U.S. patent application number 10/559390 was filed with the patent office on 2007-05-17 for method of accurately positioning anchor bolt to foundation by swing-type anchor bolt.
Invention is credited to Takashi Matsumoto.
Application Number | 20070107339 10/559390 |
Document ID | / |
Family ID | 33549412 |
Filed Date | 2007-05-17 |
United States Patent
Application |
20070107339 |
Kind Code |
A1 |
Matsumoto; Takashi |
May 17, 2007 |
Method of accurately positioning anchor bolt to foundation by
swing-type anchor bolt
Abstract
To enable realization of accurate positioning of an anchor bolt
to a foundation with a simple procedure using a member of an
extremely simple structure without using a temporary reference
construction. An anchor bolt 6 is accurately positioned and
installed on leveling concrete 2 by fixedly installing a base seat
1a of a mounting member 1 so as to be aligned with a center mark
for the anchor bolt positioned and indicated thereon, disposing the
anchor bolt 6 upright on a hollow bolt 1b via a hinge member 4 and
a turn buckle member 5, then casting concrete for a base portion
and a rising portion of the foundation simultaneously, adjusting
the anchor bolt 6 which is inclined at the hinge member 4 being
bent due to the casting pressure into a vertical state while
measuring with a plummet instrument before the concrete is
hardened, and maintaining the anchor bolt 6 in the vertical state
by a verticality holder until the concrete is hardened.
Inventors: |
Matsumoto; Takashi;
(Iwaki-shi, JP) |
Correspondence
Address: |
WENDEROTH, LIND & PONACK, L.L.P.
2033 K STREET N. W.
SUITE 800
WASHINGTON
DC
20006-1021
US
|
Family ID: |
33549412 |
Appl. No.: |
10/559390 |
Filed: |
June 14, 2004 |
PCT Filed: |
June 14, 2004 |
PCT NO: |
PCT/JP04/08313 |
371 Date: |
December 6, 2005 |
Current U.S.
Class: |
52/295 |
Current CPC
Class: |
E02D 27/32 20130101 |
Class at
Publication: |
052/295 |
International
Class: |
E02D 27/00 20060101
E02D027/00 |
Foreign Application Data
Date |
Code |
Application Number |
Jun 16, 2003 |
JP |
2003-170129 |
Claims
1. A method of accurately positioning an anchor bolt to a
foundation by a swing-type anchor bolt comprising the steps of:
fixedly installing anchor bolt mounting means on leveling concrete
so as to be aligned with a center mark for the anchor bolt
positioned and indicated thereon; mounting the anchor bolt to the
anchor bolt mounting means so that an axial center is aligned with
the center mark in a state of extending in the vertical state via a
hinge member which can be bend in any directions through
360.degree.; casting concrete for a base portion and a rising
portion of the foundation simultaneously; and adjusting the anchor
bolt that may have inclined at the time of casting to the vertical
state before the concrete is hardened, and maintaining the vertical
state by holding means.
2. A method of accurately positioning an anchor bolt to a
foundation by a swing-type anchor bolt comprising the steps of:
fixedly installing anchor bolt mounting means on leveling concrete
so as to be aligned with a center mark of an outer periphery of a
mat foundation for the anchor bolt positioned and indicated
thereon; mounting the anchor bolt to the anchor bolt mounting means
so that an axial center is aligned with the center mark in a state
of extending in the vertical state via a hinge member which can be
bent in any directions through 360.degree.; casting concrete for a
base portion; adjusting the anchor bolt that may have inclined at
the time of casting to the vertical state before the concrete is
hardened, and maintaining the vertical state thereof until the
concrete is hardened by holding means; and removing the holding
means and casting concrete for a rising portion.
3. A method of accurately positioning an anchor bolt to a
foundation by a swing-type anchor bolt comprising the steps of:
fixedly installing anchor bolt mounting means on leveling concrete
so as to be aligned with a center mark for the anchor bolt
positioned and indicated thereon; casting concrete for a base
portion of the foundation to a level of a midpoint of an extension
shaft extending upright from an immediately above the center mark,
the extension shaft extending from the anchor bolt mounting means;
mounting an anchor bolt to an upper end of the extension shaft of
the anchor bolt mounting means so that an axial center and an axial
center are aligned with each other in a state of extending in a
vertical state via a hinge member which can be bent in directions
any through 360.degree.; casting concrete for a rising portion of
the foundation; and adjusting the anchor bolt which may have
inclined at the time of casting to the vertical state before the
concrete is hardened, and maintaining the vertical state by holding
means.
4. A method of accurately positioning an anchor bolt to a
foundation by a swing-type anchor bolt comprising the steps of:
mounting unit mounting means for an anchor bolt unit on leveling
concrete so that an axial center of a reference center shaft of the
anchor bolt unit connected in a positional relation which is to be
achieved when the plurality of anchor bolts are mounted to the
foundation is aligned vertically with a center mark for the
reference center shaft of the anchor bolt unit positioned and
indicated thereon when the reference center shaft is disposed
upright in a vertical state; mounting the anchor bolt unit to the
unit mounting means so that the axial center is aligned with the
center mark in a state in which the reference center shaft is
extended upright in the vertical state via a hinge member which can
be bent in any directions through 360.degree.; casting concrete for
a base portion and a rising portion of the foundation
simultaneously; and adjusting the reference center shaft to the
vertical state to adjust the anchor bolt unit that may have
inclined at the time of casting to a vertical state before the
concrete is hardened, and maintaining the vertical state by holding
means.
5. The method of accurately positioning an anchor bolt to a
foundation by a swing-type anchor bolt according to claim 1,
wherein the center mark is positioned and indicated on the leveling
concrete in reference to directly a reference center of a
building.
6. The method of accurately positioning an anchor bolt to a
foundation by a swing-type anchor bolt to a foundation by a
swing-type anchor bolt according to claim 1, wherein a height
adjusting member is interposed immediately above or immediately
below the hinge member.
7. The method of accurately positioning an anchor bolt to a
foundation by a swing-type anchor bolt according to claim 4,
wherein the reference center shaft is formed of a shaft body
constituting an outer layer and a core member of a small diameter
constituting an axial center thereof and is adapted to be cut at
any position in a longitudinal direction.
8. The method of accurately positioning an anchor bolt to a
foundation by a swing-type anchor bolt according to claim 1
comprising the steps of: indicating a reference center line of the
foundation on the leveling concrete in reference to the reference
center of the building, fabricating a center mark indication tape
which indicates a reference center line to be aligned with the
reference center line and the center mark for the anchor bolt or
the center mark for the reference center shaft which has a
predetermined positional relation therewith in advance; and
adhering the center mark indication tape on the leveling concrete
so as to align the center mark indication tape with the reference
center line, thereby indicating the respective center marks.
9. The method of accurately positioning an anchor bolt to a
foundation by a swing-type anchor bolt according to claim 1,
wherein the hinge member is formed of a flexible tube member having
insertion joint ends at both ends.
10. The method of accurately positioning an anchor bolt to a
foundation by a swing-type anchor bolt according to claim 4,
wherein the hinge member is formed of resilient material having
joint ends at both ends.
11. The method of accurately positioning an anchor bolt to a
foundation by a swing-type anchor bolt according to claim 6,
wherein the height adjusting member is a turn buckle type height
adjusting member including an adjusting member body for adjusting
the length by being rotated and screw members having thread in the
opposite direction from each other screwed into the adjusting
member body from both ends or a piston type height adjusting member
including a cylindrical adjusting member body, two piston members
inserted from both ends thereof so as to be capable of back and
forth movement, rod members connected to the piston member so as to
project from both ends of the cylindrical adjusting member body,
two or more fixing screws screwed on a peripheral side of the
cylindrical adjusting member body, the two or more fixing screws
being screwed to peripherals side of the piston members for fixing
the position thereof.
12. The method of accurately positioning an anchor bolt to a
foundation by a swing-type anchor bolt according to claim 1,
wherein a plummet instrument for measuring the verticality of the
anchor bolt or the reference center shaft of the anchor bolt unit
is used for adjusting the anchor bolt or the anchor bolt unit to
the vertical state, and the plummet instrument includes a pipe
member for fitting on the anchor bolt or the reference center shaft
and a verticality measuring section provided on an upper end
thereof.
13. The method of accurately positioning an anchor bolt to a
foundation by a swing-type anchor bolt according to claim 12, at
least an upper portion of the anchor bolt which is fitted into the
pipe member of the plummet instrument is corrected to be a circle
having a center on an axial center in plan view before use so as to
be fitted on the pipe member smoothly without being decentered and
without looseness.
14. The method of accurately positioning an anchor bolt to a
foundation by a swing-type anchor bolt according to claim 2,
wherein the holding means including two band-shaped holding strips
connected so as to be capable of being bent at a midpoint thereof,
an anchor holding hole opening at a bent center portion; and
magnetized portions arranged at positions near both ends of the
respective band-shaped holding strips is employed, the anchor bolt
corrected to the vertical state is fitted in the anchor holding
hole, and the two band-shaped holding strips are opened into a
V-shape so that the magnetized portions at both ends can be fixedly
attached to a concrete frame formed of magnetic metal.
15. The method of accurately positioning an anchor bolt to a
foundation by a swing-type anchor bolt according to claim 2,
wherein the center mark is positioned and indicated on the leveling
concrete in reference to directly a reference center of a
building.
16. The method of accurately positioning an anchor bolt to a
foundation by a swing-type anchor bolt according to claim 3,
wherein the center mark is positioned and indicated on the leveling
concrete in reference to directly a reference center of a
building.
17. The method of accurately positioning an anchor bolt to a
foundation by a swing-type anchor bolt according to claim 4,
wherein the center mark is positioned and indicated on the leveling
concrete in reference to directly a reference center of a
building.
18. The method of accurately positioning an anchor bolt to a
foundation by a swing-type anchor bolt to a foundation by a
swing-type anchor bolt according to claim 2, wherein a height
adjusting member is interposed immediately above or immediately
below the hinge member.
19. The method of accurately positioning an anchor bolt to a
foundation by a swing-type anchor bolt to a foundation by a
swing-type anchor bolt according to claim 3, wherein a height
adjusting member is interposed immediately above or immediately
below the hinge member.
20. The method of accurately positioning an anchor bolt to a
foundation by a swing-type anchor bolt to a foundation by a
swing-type anchor bolt according to claim 4, wherein a height
adjusting member is interposed immediately above or immediately
below the hinge member.
21. The method of accurately positioning an anchor bolt to a
foundation by a swing-type anchor bolt according to claim 2
comprising the steps of: indicating a reference center line of the
foundation on the leveling concrete in reference to the reference
center of the building, fabricating a center mark indication tape
which indicates a reference center line to be aligned with the
reference center line and the center mark for the anchor bolt or
the center mark for the reference center shaft which has a
predetermined positional relation therewith in advance; and
adhering the center mark indication tape on the leveling concrete
so as to align the center mark indication tape with the reference
center line, thereby indicating the respective center marks.
22. The method of accurately positioning an anchor bolt to a
foundation by a swing-type anchor bolt according to claim 3
comprising the steps of: indicating a reference center line of the
foundation on the leveling concrete in reference to the reference
center of the building, fabricating a center mark indication tape
which indicates a reference center line to be aligned with the
reference center line and the center mark for the anchor bolt or
the center mark for the reference center shaft which has a
predetermined positional relation therewith in advance; and
adhering the center mark indication tape on the leveling concrete
so as to align the center mark indication tape with the reference
center line, thereby indicating the respective center marks.
23. The method of accurately positioning an anchor bolt to a
foundation by a swing-type anchor bolt according to claim 4
comprising the steps of: indicating a reference center line of the
foundation on the leveling concrete in reference to the reference
center of the building, fabricating a center mark indication tape
which indicates a reference center line to be aligned with the
reference center line and the center mark for the anchor bolt or
the center mark for the reference center shaft which has a
predetermined positional relation therewith in advance; and
adhering the center mark indication tape on the leveling concrete
so as to align the center mark indication tape with the reference
center line, thereby indicating the respective center marks.
24. The method of accurately positioning an anchor bolt to a
foundation by a swing-type anchor bolt according to claim 2,
wherein the hinge member is formed of a flexible tube member having
insertion joint ends at both ends.
25. The method of accurately positioning an anchor bolt to a
foundation by a swing-type anchor bolt according to claim 3,
wherein the hinge member is formed of a flexible tube member having
insertion joint ends at both ends.
26. The method of accurately positioning an anchor bolt to a
foundation by a swing-type anchor bolt according to claim 2,
wherein a plummet instrument for measuring the verticality of the
anchor bolt or the reference center shaft of the anchor bolt unit
is used for adjusting the anchor bolt or the anchor bolt unit to
the vertical state, and the plummet instrument includes a pipe
member for fitting on the anchor bolt or the reference center shaft
and a verticality measuring section provided on an upper end
thereof.
27. The method of accurately positioning an anchor bolt to a
foundation by a swing-type anchor bolt according to claim 3,
wherein a plummet instrument for measuring the verticality of the
anchor bolt or the reference center shaft of the anchor bolt unit
is used for adjusting the anchor bolt or the anchor bolt unit to
the vertical state, and the plummet instrument includes a pipe
member for fitting on the anchor bolt or the reference center shaft
and a verticality measuring section provided on an upper end
thereof.
28. The method of accurately positioning an anchor bolt to a
foundation by a swing-type anchor bolt according to claim 4,
wherein a plummet instrument for measuring the verticality of the
anchor bolt or the reference center shaft of the anchor bolt unit
is used for adjusting the anchor bolt or the anchor bolt unit to
the vertical state, and the plummet instrument includes a pipe
member for fitting on the anchor bolt or the reference center shaft
and a verticality measuring section provided on an upper end
thereof.
Description
TECHNICAL FIELD
[0001] The present invention relates to a method of accurately
positioning an anchor bolt to be embedded in foundation concrete of
various building structures by a swing-type anchor bolt.
BACKGROUND ART
[0002] In foundations of various building structures, it is
necessary to provide an anchor bolt for firmly connecting the
foundation and building frame of an upper structure to be installed
thereon at the time of construction. The anchor bolt is a member
whose lower portion is to be embedded in the foundation in a state
in which an upper portion thereof projected from an upper surface
of the foundation, as is needless to say.
[0003] In residential construction built by a conventional
construction method, through holes for anchor bolts opening on
bed-sills have been formed by measuring positions of the anchor
bolts extending upright from a top end of the foundation
individually, marking the positions on groundwork before
installation, and drilling the marked positions at a building site.
Therefore, installation of the bed-sill to the top end of the
foundation is enabled only after such a troublesome work, and is a
very inefficient work.
[0004] In contrast, even in the case of the conventional
construction method, when the through holes for the anchor bolts
are drilled in advance when pre-cutting the bed-sills, and the
carried bed-sills are installed on the top end of the foundation
quickly in the building site, the efficiency is significantly
improved. Of course, realization of this method is premised on
accurate positioning of the anchor bolt projecting from the top end
of the foundation and accurate adjustment of the same.
[0005] In prefabricated buildings or steel-frame buildings,
superstructures are fabricated in a factory, and hence flexibility
at the building site is extremely low. Therefore, accurate
installation of the anchor bolts to the foundations for connecting
with these structures is also required.
[0006] When installing such an anchor bolt to the foundation, a
method of stretching a leveling line above the top end of a rising
portion of the foundation horizontally from temporary reference
construction along its reference center line, driving the anchor
bolts along the leveling line in sequence while measuring
dimensions based on a drawing, and fixing the anchor bolts to a
concrete form in a driven state by supporting means is widely used.
Since this method must be completed within a relatively short time
until concrete is hardened, the procedures are hurriedly performed,
and hence measurement may be inaccurate. Therefore, omission of
implantation the anchor bolt may often occur as it stands now. In
addition, with this method, the temporary reference construction
which serves as a reference of measurement can be displaced with a
slight external force, and hence there is a problem such that the
reliability of the temporary reference construction which serves as
a reference cannot be secured. Furthermore, there is also a problem
such that the temporary reference construction becomes an obstacle
of various works.
[0007] As an improvement of this method, a technique disclosed in
Patent Document 1 is proposed. Instead of the temporary reference
construction, it is placed in a standing manner on an outside of a
corner of the foundation concrete form including a supporting leg
which can be adjusted in height freely, and a hooking portion for
the leveling line arranged on a L-shaped side plate at an upper end
thereof so as to be capable of sliding in the horizontal direction.
This technique has no difference from the conventional technique
except for a point that replacement of the leveling line can easily
be performed. Therefore, the problems described above are not
solved at all.
[0008] There are other techniques proposed in particular for
mounting the anchor bolt accurately to the foundation as shown
below.
[0009] One of them is aiming at accurately positioning the anchor
bolt by fixing the same to concrete form via the supporting means,
and is proposed in Patent Document 2 and Patent Document 3.
However, the proposal of Patent Documents 2 and 3 are both premised
on accuracy of concrete form for building the foundation, and aim
at improvement of mounting accuracy of the anchor bolt to an anchor
bolt supporting member or an anchor bolt holding member mounted
directly or indirectly thereto. However, it seems that required
positioning accuracy of the anchor bolt cannot be achieved
sufficiently in a practical sense.
[0010] The concrete form for building the foundation is, as long as
it is the one currently used, not able to avoid slight displacement
due to a high pressure exerted when casting concrete. Therefore, in
spite of increase of positioning accuracy in support of the anchor
bolt supporting member itself, displacement occurs on the side of
concrete form and, accordingly, displacement of the anchor bolt
supporting member itself may be resulted. Furthermore, the high
pressure exerted when casting concrete is also exerted to the
anchor bolt which is supported by the supporting member or the
like. Therefore, the supporting member cannot support the pressure,
and hence slight displacement cannot be avoided unless it has a
substantially solid structure.
[0011] Therefore, with the technique in which the anchor bolt is
fixed to the concrete form via the supporting means as shown in
Patent Documents 2 and 3, the positioning accuracy cannot be
improved sufficiently.
[0012] Alternatively, there are other techniques proposed in Patent
Document 4 and Patent Document 5, in which the lower portion is
fixed to an understructure such as an anchor plate having an anchor
bolt holding member or a fixing leg, and the upper portion is fixed
to the superstructure such as a positioning plate or a positioning
jig so as to construct a solid anchor frame, and then the
understructure is fixed to leveling concrete or the like, thereby
positioning the anchor bolt at a predetermined position.
[0013] The objects of the Patent Documents 4 and 5 are, to provide
a positioning plate in which an upper end screw portion of the
anchor bolt can be inserted and removed easily for the former, and
to improve workability by suspending plumb bobs from four sides of
a jig body of the superstructure for the latter. However, as
described above, both of the techniques are premised on the
technique to realize the accurately positioning the anchor bolt by
constructing the solid anchor frame as described above.
[0014] The anchor frames shown in Patent Documents 4 and 5 are
constructed extremely solidly, and hence they can resist the
pressure from the concrete to be cast and can maintain the accuracy
relatively easily when it is accurately positioned. However, in
such a structure, the longer the anchor bolt becomes, the higher
strength of the frame is required. Therefore, the cross-section of
the frame further increases, and the weight also increases
correspondingly, whereby workability is deteriorated and hence
increase in cost cannot be avoided.
[0015] There is also a technique in which the anchor bolt is
supported by reinforcing steel for reinforcing the foundation.
However, such reinforcing steel is displaced easily and
significantly when casting concrete. Therefore, it should be said
that the reinforcing steel is almost of no use.
Patent Document 1: Japanese Unexamined Utility Model Registration
Application No. 5-38036
Patent Document 2: Japanese Unexamined Patent Application
Publication No. 2002-242201
Patent Document 3: Japanese Unexamined Patent Application
Publication No. 2000-54397
Patent Document 4: Japanese Unexamined Patent Application
Publication No. 2000-352120
Patent Document 5: Japanese Unexamined Patent Application
Publication No. 5-141095
DISCLOSURE OF INVENTION
Problem to be Solved by the Invention
[0016] It is an object of the present invention to solve the
above-described problems in the related art and provide a method of
accurately positioning an anchor bolt to a foundation that can
realize accurately positioning the anchor bolt to the foundation
with a simple procedure without using a temporary reference
construction and using a member of an extremely simple
structure.
MEANS FOR SOLVING THE PROBLEM
[0017] A first aspect of the present invention is a method of
accurately positioning an anchor bolt to a foundation by a
swing-type anchor bolt including the steps of:
[0018] fixedly installing anchor bolt mounting means on leveling
concrete so as to be aligned with a center mark for the anchor bolt
positioned and indicated thereon;
[0019] mounting the anchor bolt to the anchor bolt mounting means
so that an axial center is aligned with the center mark in a state
of extending in a vertical state via a hinge member which can be
bend in any directions through 360.degree.;
[0020] casting concrete for a base portion and a rising portion of
the foundation simultaneously; and
[0021] adjusting the anchor bolt that may have inclined at the time
of casting to the vertical state before the concrete is hardened,
and maintaining the vertical state by holding means.
[0022] A second aspect of the present invention is a method of
accurately positioning an anchor bolt to a foundation by a
swing-type anchor bolt including the steps of:
[0023] fixedly installing anchor bolt mounting means on leveling
concrete so as to be aligned with a center mark of an outer
periphery of a mat foundation for the anchor bolt positioned and
indicated thereon;
[0024] mounting the anchor bolt to the anchor bolt mounting means
so that an axial center is aligned with the center mark in a state
of extending in a vertical state via a hinge member which can be
bent in any directions through 360.degree.;
[0025] casting concrete for a base portion;
[0026] adjusting the anchor bolt that may have inclined at the time
of casing to the vertical state before the concrete is hardened,
and maintaining the vertical state thereof until the concrete is
hardened by holding means; and
[0027] removing the holding means and casting concrete for a rising
portion.
[0028] A third aspect of the present invention is a method of
accurately positioning an anchor bolt to a foundation by a
swing-type anchor bolt including the steps of:
[0029] fixedly installing anchor bolt mounting means on leveling
concrete so as to be aligned with a center mark for the anchor bolt
positioned and indicated thereon;
[0030] casting concrete for a base portion of the foundation to a
level of a midpoint of an extension shaft extending upright from an
immediately above the center mark, the extension shaft extending
from the anchor bolt mounting means;
[0031] mounting the anchor bolt to an upper end of the extension
shaft of the anchor bolt mounting means so that an axial center and
an axial center are aligned with each other in a state of extending
in a vertical state via a hinge member which can be bent in any
directions through 360.degree.;
[0032] casting concrete for a rising portion of the foundation;
and
[0033] adjusting the anchor bolt which may have inclined at the
time of casting to the vertical state before the concrete is
hardened, and maintaining the vertical state by holding means.
[0034] A fourth aspect of the present invention is a method of
accurately positioning an anchor bolt to a foundation by a
swing-type anchor bolt including the steps of:
[0035] mounting unit mounting means for an anchor bolt unit on
leveling concrete so that an axial center of a reference center
shaft of the anchor bolt unit connected in a positional relation
which is to be achieved when the plurality of anchor bolts are
mounted to the foundation is aligned vertically with a center mark
for the reference center shaft of the anchor bolt unit positioned
and indicated thereon when the reference center shaft is disposed
upright in a vertical state;
[0036] mounting the anchor bolt unit to the unit mounting means so
that the axial center is aligned with the center mark in a state in
which the reference center shaft is extended upright in the
vertical state via a hinge member which can be bent in any
directions through 360.degree.;
[0037] casting concrete for a base portion and a rising portion of
the foundation simultaneously; and
[0038] adjusting the reference center shaft to the vertical state
to adjust the anchor bolt unit that may have inclined at the time
of casting to the vertical state before the concrete is hardened,
and maintaining the vertical state by holding means.
[0039] A fifth aspect of the present invention is the method of
accurately positioning an anchor bolt to a foundation by a
swing-type anchor bolt according to the first, second, third, or
fourth aspect of the present invention, wherein the center mark is
positioned and indicated on the leveling concrete in reference to
directly a reference center of a building.
[0040] A sixth aspect of the present invention is the method of
accurately positioning an anchor bolt to a foundation by a
swing-type anchor bolt according to the first, second, third, or
fourth aspect of the present invention, wherein the height
adjusting member is interposed immediately above or below.
[0041] A seventh aspect of the present invention is the method of
accurately positioning an anchor bolt to a foundation by a
swing-type anchor bolt according to the fourth aspect of the
present invention, wherein the reference center shaft is formed of
a shaft body constituting an outer layer and a core member of a
small diameter constituting an axial center thereof and is adapted
to be cut at any position in a longitudinal direction.
[0042] An eighth aspect of the present invention is the method of
accurately positioning an anchor bolt to a foundation by a
swing-type anchor bolt according to the first, second, third,
fourth, fifth, sixth, or seventh aspect of the present invention
including the steps of indicating a reference center line of the
foundation on the leveling concrete in reference to the reference
center of the building, fabricating a center mark indication tape
which indicates a reference center line to be aligned with the
reference center line and the center mark for the anchor bolt or
the center mark for the reference center shaft which has a
predetermined positional relation therewith in advance; and
adhering the center mark indication tape on the leveling concrete
so as to align the center mark indication tape with the reference
center line, thereby indicating the respective center marks.
[0043] A ninth aspect of the present invention is the method of
accurately positioning an anchor bolt to a foundation by a
swing-type anchor bolt according to the first, second, or third
aspect of the present invention, wherein the hinge member is formed
of a flexible tube member having insertion joint ends at both
ends.
[0044] A tenth aspect of the present invention is the method of
accurately positioning an anchor bolt to a foundation by a
swing-type anchor bolt according to the fourth aspect of the
present invention, wherein the hinge member is formed of resilient
material having joint ends at both ends.
[0045] An eleventh aspect of the present invention is the method of
accurately positioning an anchor bolt to a foundation by a
swing-type anchor bolt according to the sixth aspect of the present
invention, wherein the height adjusting member is a turn buckle
type height adjusting member including an adjusting member body for
adjusting the length by being rotated and screw members having
thread in the opposite direction from each other screwed into the
adjusting member body from both ends or a piston type height
adjusting member including a cylindrical adjusting member body, two
piston members inserted from both ends thereof so as to be capable
of back and forth movement, rod members connected to the two piston
member so as to project from both ends of the cylindrical adjusting
member body, two or more fixing screws screwed on a peripheral side
of the cylindrical adjusting member body, the two or more fixing
screws being screwed to peripherals side of the piston members for
fixing the position thereof.
[0046] The twelfth aspect of the present invention is the method of
accurately positioning an anchor bolt to a foundation by a
swing-type anchor bolt according to the first, second, third, or
fourth aspect of the present invention, wherein a plummet
instrument for measuring the verticality of the anchor bolt or the
reference center shaft of the anchor bolt unit is used for
adjusting the anchor bolt or the anchor bolt unit to the vertical
direction, and the plummet instrument includes a pipe member for
fitting on the anchor bolt or the reference center shaft and a
verticality measuring section provided on an upper end thereof.
[0047] A thirteenth aspect of the present invention is the method
of accurately positioning an anchor bolt to a foundation by a
swing-type anchor bolt according to the twelfth aspect of the
present invention, at least an upper portion of the anchor bolt
which is fitted into the pipe member of the plummet instrument is
corrected to be a circle having a center on an axial center in plan
view before use so as to be fitted on the pipe member smoothly
without being decentered and without looseness.
[0048] A fourteenth aspect of the present invention is the method
of accurately positioning an anchor bolt to a foundation by a
swing-type anchor bolt according to the second aspect of the
present invention, wherein the holding means including two
band-shaped holding strips connected so as to be capable of being
bent at a midpoint thereof, an anchor holding hole opening at a
bent center portion; and magnetized portions arranged at positions
near both ends of the respective band-shaped holding strips is
employed, the anchor bolt corrected to the vertical state is fitted
in the anchor holding hole, and the two band-shaped holding strips
are opened into a V-shape so that the magnetized portions at both
ends can be fixedly attached to a concrete frame formed of magnetic
metal.
ADVANTAGES OF THE INVENTION
[0049] According to the first, second, third, and fourth aspects of
the present invention, accurate and quick positioning of the anchor
bolt on the foundation is realized in a simple procedure using
members of an extremely simple structure without using a temporary
reference construction.
[0050] In addition by securing the verticality of the anchor bolt
or the reference center shaft using the plummet instrument, the
immovable center mark on the leveling concrete can be moved to the
top end of the foundation with a high degree of accuracy.
[0051] Since the necessity of the temporary reference construction
is eliminated, there is no obstacle in the area around the site of
the foundation work, whereby incoming and outgoing of vehicles,
movement of a construction machine, or various works can be
performed extremely easily.
[0052] According to the fifth aspect of the present invention, the
center mark can be positioned and indicated on the leveling
concrete accurately without using the temporary reference
construction.
[0053] According to the sixth aspect of the present invention, the
height of the anchor bolt to be positioned and installed can be
adjusted easily.
[0054] According to the seventh aspect of the present invention,
after the anchor bolt is positioned by the anchor bolt unit, the
core member of a small diameter which constitutes the axial center
of the reference center shaft appears on a cross-sectional surface
thereof which appears at the top end of the rising portion of the
foundation, and hence it can be used as an original point of the
reference center line to be indicated on the top end of the rising
portion of the foundation.
[0055] According to the eighth aspect of the present invention,
only by achieving the positioning for some of reference center
lines which are important with level or transit, other center marks
can be positioned and indicated on the leveling concrete extremely
easily and quickly using the center mark display tape.
[0056] According to the ninth and tenth aspects of the present
invention, the structure of the rising portion in which the anchor
bolt or the anchor bolt unit can be tilted freely can be realized
easily and reliably.
[0057] According to the eleventh aspect of the present invention,
the height of the anchor bolt can be adjusted easily as needed. The
structure is also simple.
[0058] According to the twelfth aspect of the present invention,
measurement of the verticality of the anchor bolt or the reference
center shaft can be performed easily and quickly with a simple
instrument.
[0059] According to the thirteenth aspect of the present invention,
the verticality of the anchor bolt can be secured more accurately,
and hence the accuracy of the positioning of the anchor bolt is
further enhanced.
[0060] According to the fourteenth aspect of the present invention,
even when there is an adjacent concrete frame only on one side such
as a case after concrete for the base portion on the outer
peripheral portion of the mat foundation is cast, the anchor bolt
which is corrected in inclination and secured in its verticality
can be maintained in this state easily and reliably.
BRIEF DESCRIPTION OF THE DRAWINGS
[0061] FIG. 1(a) is an explanatory front view, partly broken, of
Example 1 showing a state in which an anchor bolt is being mounted
to a mounting member via a hinge member and a turn buckle member,
and FIG. 1(b) is an explanatory front view, partly broken, of
Example 1 showing a state in which the anchor bolt is mounted to
the mounting member via the hinge member and the turn buckle
member.
[0062] FIG. 2 is an explanatory front view, partly broken, of
Example 1 showing a state in which concrete is cast in an area
where the anchor bolt mounted to the mounting member via the hinge
member and the turn buckle member is installed.
[0063] FIG. 3 is an explanatory cross-sectional view, partly
broken, of a rising portion of a foundation in Example 1 showing a
state in which a vertical state of the anchor bolt is maintained by
a verticality holder until the concrete is hardened.
[0064] FIG. 4 is an explanatory cross-sectional view, partly
broken, of the foundation in Example 1 after the concrete is
hardened.
[0065] FIG. 5 is an explanatory front view, partly broken, of
Example 2 showing a state in which the anchor bolt is mounted to an
extension shaft of the mounting member via the hinge member and the
turn buckle member.
[0066] FIG. 6(a) is an explanatory cross-sectional view, partly
broken, of Example 2 showing a state in which a ball head lock nut
provided with an extension shaft extending upright is about to be
screwed into a hollow bolt of the mounting member on leveling
concrete, and FIG. 6(b) is an explanatory cross-sectional view,
partly broken, of Example 2 showing a state in which the ball head
lock nut provided with the extension shaft extending upright is
screwed into the hollow bolt of the mounting member on the leveling
concrete.
[0067] FIG. 7 is an explanatory cross sectional view, partly
broken, of Example 2 showing a state in which concrete for a base
portion is cast in an area in which the extension shaft extended
upright from the mounting member is disposed.
[0068] FIG. 8 is an explanatory cross-sectional view, partly
broken, of Example 2 showing a state in which the anchor bolt is
about to be mounted to a volute joint projected from the concrete
for the base portion of the extension shaft extended upright from
the mounting member via the hinge member and the turn buckle
member.
[0069] FIG. 9 is an explanatory cross-sectional view, partly
broken, of Example 2 showing a state n which concrete for a rising
portion of the foundation is cast in the area where the anchor bolt
is installed from the extension shaft via the hinge member and the
turn buckle member.
[0070] FIG. 10(a) is an explanatory cross-sectional view of Example
3 showing a state in which a mounting hole is formed in leveling
concrete with a drill, FIG. 10(b) is an explanatory cross-sectional
view of Example 3 showing a state in which a plug is fitted in the
mounting hole drilled in the leveling concrete, FIG. 10(c) is an
explanatory cross-sectional view of Example 3 showing a state in
which the extension shaft provided with a screw member at a lower
end thereof is screwed into the mounting hole drilled in the
leveling concrete and fitted with the plug, and FIG. 10(d) is a
plan view of the extension shaft in Example 3.
[0071] FIG. 11 is an explanatory cross-sectional view, partly
broken, of Example 3 showing a state in which a reinforcing pipe is
fitted on the extension shaft extended upright from the mounting
hole in the leveling concrete.
[0072] FIG. 12 is an explanatory cross-sectional view, partly
broken, of Example 3 showing a state in which the reinforcing pipe
is fitted on the extension shaft extended upright from the mounting
hole in the leveling concrete and a plummet instrument is fitted
thereover.
[0073] FIG. 13(a) is an explanatory front view, partly broken, of
Example 4 showing a state in which an anchor bolt unit is mounted
to the mounting member, and FIG. 13(b) is an explanatory front
view, partly broken, of Example 7 showing a state in which the
anchor bolt unit is mounted to the mounting member, and FIG. 13(c)
is an explanatory front view, partly broken, of Example 8 showing a
state in which the anchor bolt unit is mounted to the mounting
member.
[0074] FIG. 14 is an enlarged explanatory plan view of the mounting
member according to Example 1 and Example 2.
[0075] FIG. 15(a) is an explanatory cross-sectional view of the
mounting member according to Example 5, and FIG. 15(b) is an
explanatory cross-sectional view of the mounting member according
to Example 6.
[0076] FIGS. 16(a) to (f) are explanatory plan views showing
examples of a center mark indication tape used in the respective
Examples.
[0077] FIG. 17(a) is a general perspective view of an inspection
tool for the plummet instrument according to Example 10 with the
plummet instrument shown adjacently thereto, and FIG. 17(b) is a
general perspective view of the inspection tool for the plummet
instrument according to Example 11.
[0078] FIG. 18(a) is a general front view of a verticality holder
used in the respective Examples, FIG. 18(b) is a general side view
of the verticality holder used in the respective Examples, FIG.
18(c) is an explanatory plan view showing a state in which the
anchor bolt is supported by the verticality holder and fixedly
attached to concrete forms both sides in the respective Examples,
and FIG. 18(d) is a general perspective view showing a state in
which the anchor bolt is supported by the verticality holder and
fixedly attached to one side of the concrete form in the respective
Examples.
[0079] FIG. 19(a) is a general perspective view of the plummet
instrument in Example 9, FIG. 19(b) is a general perspective view
of an adaptor in Example 9, FIG. 19(c) is a general perspective
view of the plummet instrument to which the adaptor in Example 9 is
attached, FIG. 19(d) is an enlarged cross-sectional view taken
along the line d-d in FIG. 19(a), and FIG. 19(e) is an enlarged
cross-sectional view taken along the line e-e in FIG. 19(b).
[0080] FIG. 20(a) is a general front view in cross-section showing
a state in which the plummet instrument is set to a reference
center shaft of the anchor bolt unit in Example 9, FIG. 20(b) is a
general front view in cross-section showing a state in which the
plummet instrument with the adaptor mounted to the anchor bolt is
attached to the mounting member via the hinge member and the turn
buckle member according to Example 9.
REFERENCE NUMERALS
[0081] 1 mounting member (anchor bolt mounting means) [0082] 1a
base seat [0083] 1b hollow bolt [0084] 1c view hole [0085] 1d
sector shaped projection [0086] 1e screw member [0087] 1f flange
body [0088] 2 leveling concrete [0089] 3 concrete screw [0090] 4
hinge member [0091] 5 turn buckle member (height adjusting member)
[0092] 5a screw member [0093] 5b turn buckle member body [0094] 5c
screw member [0095] 5d volute joint [0096] 6 anchor bolt [0097] 6a
flange member [0098] 6b male screw [0099] 6c nut [0100] 7 ball head
lock nut [0101] 7a volute joint [0102] 7b extension shaft [0103] 7c
cross groove [0104] 8 concrete [0105] 9 plummet instrument [0106]
9a verticality measuring section [0107] 9b pipe member [0108] 10
verticality holder (holding means) [0109] 10a band-shaped holding
strip [0110] 10b anchor holding hole [0111] 10c magnet [0112] 11
reinforcing pipe [0113] 11a reinforcing flange [0114] 12 template
[0115] 13 reference center shaft [0116] 13a shaft body [0117] 13b
shaft member [0118] 14 hinge member [0119] 15 auxiliary spring
[0120] 16 anchor bolt unit [0121] 18 concrete for base portion
[0122] 19 adaptor [0123] 19a flange body [0124] 19b adjusting pipe
member [0125] 21 mounting member [0126] 21a taper member [0127] 21b
cylindrical body [0128] 21c volute joint [0129] 21d bolt member
[0130] 25 supporting pole [0131] 28 concrete for rising portion of
foundation [0132] 29 inspection tool [0133] 29a float [0134] 29b
set shaft [0135] 29c plumb bob shaft [0136] 31 mounting member
[0137] 31a base seat [0138] 31b mounting nut [0139] 31c viewing
hole [0140] 31d volute joint [0141] 31e volt member [0142] 35
supporting pole [0143] 35a damper [0144] 39 inspection tool [0145]
39a base plate [0146] 39b universal joint mechanism [0147] 39c set
shaft [0148] 39d plumb bob shaft [0149] ca center mark for anchor
bolt [0150] cs center mark for reference center shaft of anchor
bolt unit [0151] d drill [0152] h screw hole [0153] hm mounting
hole [0154] k concrete form [0155] L1, L2 reference center line
[0156] m notched groove [0157] n nut [0158] p plug member [0159]
t1-t6 center mark indication tape [0160] v v-shaped notch
BEST MODE FOR CARRYING OUT THE INVENTION
[0161] The present invention provides a method of accurately
positioning an anchor bolt to a foundation by a swing-type anchor
bolt based on the steps of indicating a center mark for an anchor
bolt or for a reference center shaft of an anchor bolt unit on
immovable leveling concrete, installing the anchor bolt or the
anchor bolt unit on the leveling concrete so as to be capable of
tilting freely with the anchor bolt itself or the reference center
shaft of the anchor bolt unit aligned vertically with the center
mark, casting concrete, adjusting the anchor bolt or the anchor
bolt unit which may be inclined during casting of the concrete into
a vertical state and moving the anchor bolt itself or the reference
center shaft of the anchor bolt unit so as to be extend upright at
a position matching vertically with the center mark before the
concrete is hardened, and maintaining the same in the vertical
state by holding means until the concrete is hardened.
[0162] The present invention basically has a structure described
above, and is used for positioning the anchor bolt in the same
principle. However, more specifically, it is classified into two
categories of positioning of the single anchor bolt and positioning
of the anchor bolt unit having the plurality of anchor bolts
combined with each other with a predetermined positional relation.
The positioning of the single anchor bolt in the former case is
further divided into two categories depending on whether casting of
foundation concrete is performed separately for a base portion and
a rising portion in two steps, or it is performed in one step
without separating the procedure.
[0163] A difference between the positioning of the single anchor
bolt and the positioning of the anchor bolt unit having the
plurality of anchor bolts combined with each other is, as described
above, that the vertical adjustment after casting of concrete is
performed for the anchor bolt itself in the former case, while it
is performed for the reference center shaft provided in the unit in
the latter case. The latter case is of course configured to achieve
efficient positioning by combining the plurality of anchor bolts
together, and the practical mutual positioning principle is the
same.
[0164] In the case in which the casting of concrete is performed in
two steps, the positioning of the single anchor bolt is different
between the case of an outer periphery of a mat foundation and the
case of portions other than the outer periphery of the mat
foundation and other types of foundations (continuous footing
foundation, independent foundation, hybrid foundation, continuous
foundation).
[0165] In the case in which the casting of concrete is performed in
two steps and in the case of the portions other than the outer
periphery of the mat foundation and the other types of foundations,
it is necessary to provide an extension shaft which extends further
upward from a top end of concrete to be cast for the base portion
(concrete cast in the first step) on an anchor bolt mounting means
to be installed corresponding to the center mark of leveling
concrete, and also it should have a strength that can resist from
displacement even by casting of the concrete for the base portion.
On the other hand, in the case of the outer periphery of the mat
foundation, it is not necessary to be like the case described above
even in the case of casting concrete in two steps.
[0166] In the case in which the casting of concrete is performed in
two steps and in the case of the portions other than the outer
periphery of the mat foundation and the other types of foundations,
the anchor bolt is mounted to the extension shaft projecting from
concrete for the base portion so as to be capable of tilting
freely, concrete for the rising portion is cast, and subsequently,
the anchor bolt is adjusted to the vertical state before the
concrete is hardened, and then the anchor bolt is maintained in the
vertical state by the holding means until the concrete is hardened.
On the other hand, in the case of all the types of foundations
other than the mat foundation and the casting of concrete is
performed in one step, the anchor bolt is mounted while matching
with the center mark of leveling concrete so as to be capable of
tilting freely, concrete is cast both for the base portion and the
rising portion, the anchor bolt is adjusted in the vertical state
before the concrete is hardened, and maintained by simple holding
means until the concrete is hardened.
[0167] In the case of the mat foundation, concrete for the base
portion and concrete for the rising portion are cast in two steps.
In the case of the outer periphery, the anchor bolt is disposed
upright from the anchor bolt mounting means so as to be capable of
tilting freely without providing the extension shaft on the anchor
bolt mounting means as in the case of casting concrete in one step
for the foundations other than the mat foundation, and concrete for
the base portion is cast. Since concrete in the outer periphery of
the mat foundation is as deep as concrete reaches the midsection of
the anchor bolt, inclination of the anchor bolt is corrected using
a plummet instrument before the concrete is hardened and the
verticality is secured, and then the verticality of the anchor bolt
is maintained by the holding means.
[0168] When casting concrete for the base portion, since only an
outer frame side of concrete form exists in the outer periphery of
the mat foundation, it is preferable to employ holding means
including two band-shaped holding strips connected so as to be bent
at a midpoint thereof, an anchor holding hole opening at a bent
center portion, and magnetized portions arranged at positions near
both ends of the respective band-shaped holding strips as the
holding means, so that the anchor bolt with the verticality secured
is fitted in the anchor holding hole, and the two band-shaped
holding strips are opened into a V-shape, thereby being fixedly
attached to the outer concrete form with the magnetized portions at
both ends. Since concrete frame employed is normally formed of
magnetic metal, this adsorption joint using the magnetized portions
is achieved.
[0169] In the outer periphery of the mat foundation, concrete for
the rising portion is cast after the concrete for the base portion
is hardened. However, since the anchor bolt is reliably fixed by
the concrete for the base portion at this point of time, it is not
necessary to fix the anchor bolt by the holding means.
[0170] The principle of positioning is identical for any of the
cases shown above. In the case in which concrete is cast in two
steps and in the case of the portion other than the outer periphery
of the mat foundation and the other types of foundations, the
anchor bolt is mounted to the extension shaft so as to be capable
of tilting freely when casting concrete for the rising portion.
Therefore, unless the extension shaft is maintained in the vertical
state and the reliably aligned relation with the center mark
indicated on leveling concrete is maintained, accuracy of the
positioning of the anchor bolt mounted thereon cannot be secured.
Therefore, as described above, the anchor bolt mounting means to be
mounted to the leveling concrete and the extension shaft must have
a sufficiently high strength so as to avoid displacement even when
the concrete for the base portion is cast.
[0171] Since the thickness of the concrete for the base portion in
this case is significantly smaller than that of the rising portion,
the pressure generated when casting concrete is not so high. On the
other hand, since the extension shaft must simply play a role to
extend the center mark on leveling concrete up to the top of the
base concrete, it can be formed into a column shape which is not
too thick, and the pressure exerted by concrete can be reduced as
well. Therefore, the strength required for the anchor bolt mounting
means and the extension shaft does not affect the cost.
[0172] Anyway, in the present invention, it is firstly necessary to
position the center mark for the anchor bolt or the center mark for
the reference center shaft of the anchor bolt unit on leveling
concrete, and indicate the same.
[0173] The leveling concrete is to be arranged entirely in a
foundation building area or across a sufficient width along an
installation line of the rising portion in advance.
[0174] Furthermore, the center mark for the anchor bolt or the
center mark for the reference center shaft of the anchor bolt unit
are to be positioned and marked and indicated by charcoal or other
marking means on the leveling concrete directly from the reference
center of the building. It is also possible to position the
reference center line of the rising portion of the foundation from
the reference center of the building, and indicate it on the
leveling concrete, so that the center mark for the anchor bolt can
be positioned with reference to the reference center line.
[0175] In this case, a center mark indication tape on which the
reference center line to be aligned with the reference center line
of the rising portion of the foundation and the center mark for the
anchor bolt or the center mark for the reference center shaft of
the anchor bolt unit which is to be a specific positional relation
with the reference center line are indicated is manufactured in
advance, and the center mark indication tape is adhered on the
leveling concrete while matching the reference center lines with
each other, whereby the respective center marks can be
indicated.
[0176] Subsequently, when the single anchor bolt is placed upright
on the leveling concrete as described above, the anchor bolt
mounting means is fixedly mounted so as to match the center mark.
In the case of the foundations other than the mat foundation and in
the case in which the casting of concrete is performed for the base
portion and the rising portion in two steps in sequence as
described above, the anchor bolt mounting means having the upright
extension shaft of a length exceeding the thickness of the base
portion is employed. When the casting of concrete for the base
portion is performed simultaneously with that for the rising
portion, such the extension shaft is not necessary.
[0177] In the case of portion other than the outer periphery of the
mat foundation, concrete is cast in two steps, and it is completely
the same as the case of providing on the foundation other than the
mat foundation and of performing that for the base portion and for
the rising portion in two steps in sequence.
[0178] The anchor bolt mounting means used in the case in which
casting of concrete is performed in two steps needs to have a
higher strength than that used in the case in which it is performed
in one step. However, there is no reason to differentiate the
structure itself except for the point described above. In either
cases, various structures may be employed freely while maintaining
the required mounting strength.
[0179] For example, a structure including an ore anchor to be fixed
by being struck into a mounting hole drilled in leveling concrete,
and a shaft member connected thereto having connecting means with
respect to a hinge member or a height adjusting member described
later, a structure including a base seat to be fixed on leveling
concrete with adhesive agent, a concrete nail, a concrete screw or
the like, a nut member fixedly provided thereon, and a bolt member
to be screwed into the nut member having the connecting means with
respect to the hinge member or the height adjusting member
described later, or a structure including the base seat to be fixed
on leveling concrete with adhesive agent, the concrete nail, the
concrete screw or the like, a hollow bolt member fixedly provided
thereon, a ball head lock nut member to be screwed on the hollow
bolt member having the connecting means with respect to the hinge
member or the height adjusting member described later can be
employed.
[0180] Alternatively, a structure including the base seat to be
fixed on leveling concrete with adhesive agent, the concrete nail,
or the concrete screw or the like, one of coupler joints fixedly
provided thereon, the other coupler joint to be disconnectably
connected to the one of the coupler joints having the connecting
means with respect to the hinge member or the height adjusting
member described later, or a structure including a screw member to
be screwed into a plug member press-fitted into the mounting hole
drilled in leveling concrete, and connecting means with respect to
the hinge member or the height adjusting member, described later,
provided integrally with an upper end thereof can be employed.
[0181] The base seat described above is preferably formed with a
viewing hole at a center thereof, so that it can be mounted while
checking out the center mark when installing it on leveling
concrete. Also, by providing two sector-shaped projecting strips so
that the apexes thereof project in this viewing hole thereof so as
to oppose to each other, further accurate matching of the centers
is achieved by locating the sides of the two sector-shaped
projecting strips in the viewing hole of the base seat along the
intersecting reference center lines indicated thereon when
installing the base seat on the leveling concrete.
[0182] When concrete is cast in two steps, the verticality of the
extension shaft to be disposed upright on the mounting means must
be secured as described above, which must be measured at the time
of installation and adjusted to be maintained. It may be achieved
by using various types of plummet instruments, and there is no
reason to use a specific one. However, in order to achieve higher
efficiency, the plummet instrument including a pipe member that can
be fitted on the extension shaft smoothly with little looseness and
a verticality measuring section formed on an upper end thereof may
be used.
[0183] The verticality measuring section may be those having an
appropriate accuracy. However, a structure as simple as possible is
preferred. For example, a structure in which the verticality is
measured by an air ball in liquid positioned at a center of an
upper surface may be employed.
[0184] The pipe member preferably has a diameter which allows
fitting on the anchor bolt or the like to be measured smoothly with
little looseness as described above, that is, an inner diameter
which slightly exceeds the diameter of the anchor bolt or the like
to be measured. In order to realize smoother insertion and removal,
the inner diameter of the pipe member is formed slightly larger
than the outer diameter of the anchor bolt or the like to be
measured, and the inner surface thereof is formed with a plurality
of projecting ridges extending along an axial direction over the
entire inner periphery at regular angular intervals. In this case,
a diameter of a circle formed by connecting apexes of the plurality
of projecting ridges is set to slightly exceed the outer diameter
of the anchor bolt or the like to be measured. Since the surface
area of the portions which come into contact with the outer
periphery of the anchor bolt or the like when fitting is decreased,
smoother insertion and removal are achieved. In addition, it is
convenient to form a lower end of the pipe member so as to be
widened gradually downward because it helps an upper end of the
anchor bolt to be guided toward the center when being fitted on the
anchor bolt or the like.
[0185] The pipe member of the plummet instrument is preferably
formed to have the inner diameter which matches a diameter of an
object to be measured having the largest outer diameter, and
adapted to be used with the object to be measured with a smaller
diameter by fitting an adapter to the pipe member. The adapter has
an outer diameter corresponding to the inner diameter of the pipe
member and an inner diameter corresponding to the outer diameter of
the object to be measured. It is also convenient to form a
plurality of projecting ridges on the inner periphery thereof as on
the inner periphery of the pipe member as well for smooth insertion
and removal of the object to be measured. It is preferable to
provide an annular flange on an outer periphery at a lower edge and
an entrance of the lower edge is formed to be widened gradually
downward.
[0186] As is understood from the description above, it is needless
to say that the plummet instrument described above is used not only
for measurement of verticality of the extension shaft, but also for
measurement of verticality of the anchor bolt to be disposed
upright from the extension shaft or the anchor bolt mounting means
on leveling concrete or for measurement of verticality of the
reference center shaft of the anchor bolt unit. It is also used in
other various cases as a matter of course.
[0187] Subsequently, when casing concrete in two steps, concrete
for the base portion is cast. Of course, it is premised that the
concrete form for the base portion is separately provided. The
concrete for the base portion is cast to a level near immediately
below the upper end of the extension shaft extended upright from
the anchor bolt mounting means. It is needless to say that the
length of the extension shaft is set correspondingly.
[0188] Subsequently, when the concrete for the base portion is
hardened to some extent, the anchor bolt is disposed upright on the
upper end of the extension shaft via the hinge member. In addition
to the hinge member, the height adjusting member is interposed
immediately above or below when it is required. In the operation
above, the anchor bolt is mounted to the extension shaft so that
the axial centers match with each other.
[0189] The hinge member is means which can be bent in any
directions through 360.degree. at this portion, and the structure
is not specifically limited as long as it has such a function. For
example, the hinge member can be formed of a flexible tube member
having insertion joint ends at both ends. In this case, volute or
helical joints are formed at the upper end of the extension shaft
and the lower end of the anchor bolt respectively, so that
connection is achieved by inserting the respective joints into the
tube member from the corresponding ends. This joint can be
reinforced by a band or the like as needed. It is also the same in
the case of interposing the hinge member between the anchor bolt
mounting means and the anchor bolt, and in this case, means like a
connecting rod is disposed upright on the upper portion of the
former, and the volute or helical joints are formed in the same
manner on the upper end thereof or the lower end of the latter to
achieve the same connection.
[0190] The hinge member may be formed of a flexible multi-layered
rubber column or other resilient materials having joint ends at
both ends. It is also possible to employ a single-layer rubber
column as the resilient material. The hinge member of this
structure is suitable for being interposed between the anchor bolt
unit in which the plurality of anchor bolts are set together and
the mounting means thereof. Of course, depending on the size, it
may be suitable for being interposed between the single anchor bolt
and the extension shaft or the mounting means.
[0191] The height adjusting member is means for adjusting the
height of the anchor bolt, and the structure is not specifically
limited as long as this adjustment is possible. For example, the
height adjusting member may be of a turn buckle type including an
adjusting member body for adjusting the length by being rotated,
and screw members having threads in opposite directions and screwed
into the adjusting member body from both ends.
[0192] Alternatively, it may be of a piston type having a
cylindrical adjusting member body, two piston members inserted from
both ends thereof so as to be capable of back and forth movement,
rod members connected to the two piston members and projecting from
both ends of the cylindrical adjusting member body, two or more
fixing screws screwed on a peripheral side of the cylindrical
adjusting member body to be screwed until it reaches the periphery
of the piston member for fixing the position thereof.
[0193] The anchor bolt is disposed upright on the extension shaft
via the hinge member, and also the height adjusting member as
needed, then the height is adjusted as needed, and then concrete
for the rising portion of the foundation is cast. At this time, an
additional concrete form for the rising portion must be installed
as a matter of course. This concrete form is configured along a
line of the width of the foundation obtained by a foundation width
scale in reference to the extension shafts at a plurality of
positions. The concrete form can be constructed by efficient
measurement as described above.
[0194] Casting of concrete as described above exerts a
corresponding pressure to the anchor bolt. The anchor bolt is
connected to the extension shaft at least via the hinge member as
described above, and hence is able to be bent in any directions
through 360.degree.. Therefore, it is inclined by the pressure in
the corresponding direction at a corresponding portion to release
most part of the pressure, whereby a large external force is not
exerted to the extension shaft. Therefore, the extension shaft and
an anchor bolt mounting portion at the lower end thereof are
maintained in the same state as it was initially installed on the
leveling concrete, and the extension shaft is maintained in a state
in which the upper end thereof is accurately positioned vertically
above the center mark.
[0195] Subsequently, immediately, that is, before the concrete is
hardened, the plummet instrument is set to the upper end of the
anchor bolt to restore the anchor bolt into the vertical state
while checking out the verticality measuring section of the plummet
instrument, and the anchor bolt is maintained in this state by the
holding means until the concrete is hardened. The plummet
instrument may be kept in the state of being set to the anchor bolt
so that the verticality thereof can be checked out easily at the
time of making the round, which is convenient.
[0196] The holding means is used for holding the anchor bolt until
the concrete is hardened and, once it is set, there is no
possibility of being exerted with a large external force unless
there is something irregular, and hence the holding means of a
simple structure is sufficient for holding the same. For example, a
holding tool or the like including two band-shaped holding strips
which can be bent at the center, and being formed with an anchor
holding hole at a center of the bent portion may be employed. The
one having magnets near both ends thereof so as to be capable of
being fixed to the concrete form of magnetic metal of iron system
is suitable.
[0197] When this holding means is used, the anchor holding hole is
fitted to the portion near the upper end of the anchor bolt, and
the both ends of the two holding strips are fixedly attached to the
upper end of the concrete form by the magnet disposed thereon, so
that the vertical state of the anchor bolt is maintained. The
holding means is opened into a substantially linear state, and the
both ends thereof are fixedly attached to the upper ends of the
concrete forms on both sides, or is bent into a V-shape and the
both ends thereof are fixedly attached to the upper end of the
concrete form on one side.
[0198] On the other hand, in the case of the continuous footing
foundation or other foundations (the mat foundation is excluded)
and in the case in which concrete is cast at once for both of the
base portion and the rising portion in one casting step, the anchor
bolt is connected via the hinge member, or the height adjusting
member as needed without providing the extension shaft on the
anchor bolt mounting means which is mounted on the leveling
concrete so as to match the center mark as described above. The
anchor bolt must be arranged so that the axial center thereof is
aligned vertically with the center mark in the vertical state, as a
matter of course.
[0199] The hinge member and the height adjusting member are those
described above, and the method of connecting to each other is also
the same.
[0200] Subsequently, concrete for the base portion and the rising
portion of the foundation are cast at once, and the anchor bolt
which is inclined thereby is restored to the vertical position
using the plummet instrument. Then, the anchor bolt in the vertical
state is maintained by the holding means until the concrete is
hardened as described above. The holding means and the holding
method are also the same as those described above.
[0201] In either cases where concrete is cast in two steps and in
one step, the anchor bolt is maintained in the vertical state
maintained by the holding means as described above. However, the
holding means is used merely for supplementarily supporting the
anchor bolt until the concrete is hardened, and hence is simple in
structure, so that it will not be a hindrance when adjusting the
top end level of the rising portion of the foundation.
[0202] After the concrete has hardened, the holding means is
removed from the anchor bolt, and if the plummet instrument is sill
set thereon, it is also removed. Since the anchor bolt must have
been kept in a relation in which the axial center thereof is
aligned vertically with the center mark on the leveling concrete as
long as it is kept in the vertical state at this moment, the anchor
bolt is accurately positioned in the foundation with an extremely
simple mounting operation.
[0203] In the case of the outer periphery of the mat foundation,
casting of concrete is performed in two steps for the base portion
and the rising portion as described above, the method of mounting
the anchor bolt to the anchor bolt mounting means is the same as
the case of the continuous footing foundation and other type of
foundations (the mat foundation is excluded), and in the case in
which concrete is cast in one step. The anchor bolt is disposed
upright on the anchor bolt mounting means so as to be capable of
tilting freely via the hinge member or the like and then concrete
for the base portion is cast.
[0204] Since the concrete reaches up to the midsection of the
anchor bolt in the outer periphery of the mat foundation, the
plummet instrument is set to the upper end of the anchor bolt
before the concrete is hardened, and the anchor bolt inclined due
to the casting of the concrete is corrected to the vertical state.
Whether it is corrected to the vertical state or not is checked
with the plummet instrument. The anchor bolt whose verticality is
secured is maintained in its vertical state by the holding means as
described above.
[0205] After the concrete for the base portion is hardened, the
holding means is removed and then concrete for the rising portion
is cast. At this moment, since the anchor bolt is firmly held by
the concrete for the base portion, there is no possibility to be
inclined by the casting of the concrete for the rising portion.
[0206] In this manner, in the outer periphery of the mat
foundation, the anchor bolt can be positioned upright accurately
with the extremely simple operation.
[0207] In the case in which the anchor bolt unit including the
plurality of anchor bolts set together is disposed upright on the
leveling concrete, the unit mounting means for mounting the anchor
bolt unit is fixedly installed while being aligned with the center
mark for the reference center shaft.
[0208] The anchor bolt unit includes the plurality of anchor bolts
joined in the same positional relation as the positional relation
to be achieved when being mounted to the foundation with supporting
plates such as templates, and the reference center shaft is
arranged in the anchor bolt unit in a positional relation which can
realize the positional relation of the anchor bolts in the
foundation when the reference center shaft is arranged on the
center mark on the leveling concrete in the vertical state.
[0209] Therefore, when the anchor bolt unit is mounted to the unit
mounting means, the unit mounting means positions and fixes the
axial center of the reference center shaft so as to match
vertically with the corresponding center mark on the leveling
concrete by bringing the anchor bolt and the reference center shaft
into the vertical state.
[0210] Subsequently, the anchor bolt unit is mounted to the unit
mounting means via the hinge member, or the height adjusting member
as needed, so that the axial center of the reference center shaft
is aligned with the center mark in a state in which the anchor
bolts or the like are disposed upright in the vertical state.
[0211] The anchor bolt unit is preferably provided with auxiliary
legs extended downward from the supporting plate such as the
template for positioning and supporting the anchor bolts in the
state described above, thereby causing them to provide an
inclination preventing effect which prevents inclination more than
necessary as described above.
[0212] Subsequently concrete for the base portion and the rising
portion of the foundation are cast simultaneously, and the anchor
bolt unit which is inclined during this operation is adjusted to
the vertical state before the concrete is hardened. This can be
achieved by setting the plummet instrument to the reference center
shaft and moving the same, and securing its verticality. Since the
reference center shaft is arranged in parallel with all the anchor
bolts in the unit, the verticality of all the anchor bolts can be
secured simply by correcting the reference center shaft.
[0213] The reference center shaft thus adjusted to the vertical
state is maintained in its vertical state by the holding means
until the concrete is hardened. The holding means may be the one
described above, and hence the method of usage is the same as a
matter of course. Also, as described above, since it is a holding
means of simple structure, there is little possibility to be a
hindrance of level adjustment or the like of the top end of the
foundation. The plummet instrument may be kept in the state of
being set to the reference center shaft so that the verticality
thereof can be checked out easily at the time of making the round,
which is convenient.
[0214] After the concrete is hardened, the holding means is
removed, and the template provided above is also removed. The
reference center shaft is pulled out, or cut off at the top end
level of the rising portion of the foundation. If the plummet
instrument is set, it is also removed. In a case in which the
reference center shaft is formed of a shaft body constituting an
outer layer and a core member of a small diameter constituting an
axial center thereof and is adapted to be cut at any position in
the longitudinal direction, it should be cut at the top end level
of the rising portion of the foundation as described above. At this
time, when the reference center shaft is cut, the core member of a
small diameter which constitutes the axial center appears on the
end surface thereof irrespective of its cutting position in the
height direction thereof, which can be used as an original point of
the reference center line to be indicated on the top end of the
rising portion of the foundation. This core member is preferably
differentiated in color from the outer layer for better
visibility.
[0215] When positioning is performed using the anchor bolt unit as
described above, positioning of the plurality of anchor bolts can
be achieved effectively at once. Accurate positioning of the
respective anchor bolts is totally achieved as long as the
verticality of the reference center shaft is maintained, as will be
understood from the description above.
[0216] In either cases described above, after casting of concrete,
there is the step to be performed for restoring the anchor bolt
inclined by the casting pressure of the concrete to the vertical
state before the concrete is hardened, which is the most important
step. When the plummet instrument including the pipe member which
can be fitted on the anchor bolt or the reference center shaft as
described above and the verticality measuring section provided on
the upper end thereof is used, the anchor bolt or the reference
center shaft to be measured must be a complete round having its
center on its axial center when viewed from the top. If it is
decentered, when the pipe member of the plummet instrument is
fitted on the anchor bolt or the like, it is inclined in the
decentered direction, and hence the accurate verticality of the
anchor bolt or the like cannot be secured easily.
[0217] The reference center shaft is manufactured for this purpose,
and is configured to be a complete round having its center on the
axial center thereof when viewed from the top. On the other hand,
as regards the anchor bolt, those commercially available are used,
and hence in many cases, screw portions at their upper end are not
manufactured accurately. The outer edge of the spinning screw which
constitutes the upper screw portion is partly projecting in many
cases, and it does not assume a round having a center on the axial
center thereof when viewed from the upper end side. Therefore, with
these anchor bolts solely, whether or not they are brought into the
vertical state cannot be measured accurately with the plummet
instrument.
[0218] Therefore, as regards the anchor bolts, those which are
processed and corrected in the factory or the like in advance so as
to assume a circle having a center on the axial center in plan view
for at least the portion including the upper screw portion where
the pipe member of the plummet instrument is fitted so as to
achieve smooth fitting on the pipe member without being decentered,
and without looseness must be used. This process can be achieved by
removing the portion projecting more than necessary by a turning
processing or the like. The anchor bolt of a different shape can
become usable after such a processing.
[0219] When the hinge member is formed of a flexible tube member
having insertion joint ends at both ends, and is adapted to be
connected via the volute joints inserted into the upper and lower
ends thereof, the volute joints also need to have a circumference
assuming a complete circle having a center on the axial center in
plan view, and is not allowed to be decentered. It is the same when
the height adjusting member is employed and configured of a
mechanism such as a turn buckle, and it is necessary that the upper
and lower bolt members are formed without decentering and both of
the bolt members are positioned accurately on the same axial
center.
EXAMPLE 1
[0220] Example 1 relates to a method of positioning an anchor bolt
to be installed in a concrete foundation of a wooden building and,
in particular is suitable for the case of installing an anchor bolt
which is required to have a high accuracy such as a hold-down
anchor bolt, an anchor bolt to be installed at a portion close to a
bracing, or an anchor bolt to be installed at a bed-sill joint
portion. In addition, it is also suitable as a method used for
positioning of all other types of anchor bolts, as a matter of
course.
[0221] In a first step, a center mark for the anchor bolt to be
installed is positioned and indicated on leveling concrete using
this method. The leveling concrete is to be disposed within a
required range in an area to establish the foundation in
advance.
[0222] The center mark for the anchor bolt as described above is to
be positioned directly from a reference center of a building which
is separately set and indicated on the leveling concrete, and
indicated with charcoal or other marking means. This positioning
can easily be achieved using a measuring instrument such as a
transit instrument. It is also possible to perform this positioning
using the transit instrument or the like only on a principal
portion such as reference center lines of a rising portion of the
foundation, and perform the positioning of the center mark or the
like for the anchor bolt by measurement in reference to these
reference center lines.
[0223] In this case, a method using center mark indication tapes
t1-t6 as shown in FIGS. 16(a) to (f) to position and indicate the
center marks for the anchor bolt and a reference center shaft of an
anchor bolt unit is speedy and the accurate positioning and
indication are achieved. The center mark indication tapes t1-t6
have reference center lines L1, L2 to be aligned with the reference
center line positioned by the transit instrument or the like, and a
center mark ca for the anchor bolt and a center mark cs for the
reference center shaft of the anchor bolt unit which are positioned
at a predetermined relation with the reference center lines L1, L2
indicated thereon. The center mark indication tapes t1-t6 are, as
will be understood from the description above, capable of
positioning and indicating the respective center marks ca, ca . . .
and cs, cs . . . by adhering on the leveling concrete so that the
reference center lines L1, L2 match the reference center lines
positioned and indicated on the leveling concrete.
[0224] Subsequently, in Example 1, the anchor bolts are installed
using the center marks ca, ca . . . for the anchor bolts positioned
and indicated on the leveling concrete as described above. Firstly,
a mounting member (anchor bolt mounting means) 1 constituted of a
hollow bolt 1b with a base seat 1a is fixedly installed so as to
match the corresponding center mark ca. The base seat 1a has a
viewing hole 1c opening at a center as shown in FIG. 1(a) and FIG.
14, and two sector-shaped projecting strips 1d, 1d are provided so
that the apexes thereof project in the viewing hole 1c so as to
oppose to each other. On the outside of the hollow bolt 1b, a
number of screw holes h, h . . . which also serve as connecting
holes for adhesive agent are formed to open consecutively. Notches
v of V-shape to be aligned with the reference center lines L1, L2
are formed at a center of each sides, and notched grooves m for
cutting off triangular shapes from respective four corners are
formed at positions near the respective corners.
[0225] An operator places the mounting member 1 on leveling
concrete 2 as shown in FIG. 1(a), and views inside the viewing hole
1c from above, and positions the same while matching one or both of
sides of the two sector-shaped projecting strips 1d, 1d in the
viewing hole 1c with one or both of the intersecting reference
center lines L1, L2 indicated therein or a center line of only the
center mark ca in question. In this manner, the hollow bolt 1b of
the mounting member 1 can be installed so as to be aligned
extremely accurately with the center mark ca.
[0226] Fixation of the base seat 1a of the mounting member 1 to the
leveling concrete 2 is performed using adhesive agent and concrete
screws 3, 3 . . . .
[0227] Subsequently, as shown in FIGS. 1(a) and (b), an anchor bolt
6 is installed upright to the hollow bolt 1b of the mounting member
1 via a hinge member 4 and a turn buckle member (height adjusting
member) 5.
[0228] The hinge member 4 is, as shown in FIGS. 1(a) and (b),
formed of flexible tube member and is inserted and connected at an
insertion joint end at a lower end with a volute joint 7a of a
shaft extending upright from a center of an upper end of a ball
head lock nut 7 to be screwed into the hollow bolt 1b and at an
insertion joint end at an upper end with a volute joint 5d at a
lower portion of a screw member 5a extending downwardly of the turn
buckle member 5.
[0229] The turn buckle member 5, as shown in FIGS. 1(a) and (b),
includes a turn buckle member body 5b formed with female screws of
opposite directions on an upper portion and a lower portion of an
inner periphery thereof, and the screw member 5a screwed into the
turn buckle member body 5b from a lower end thereof, and a screw
member 5c screwed into the turn buckle member body 5b from an upper
end thereof. The two screw members 5a, 5c are male screw members
having threads in the opposite directions from each other,
corresponding to the female screws formed on the upper and lower
portion of the inner periphery of the turn buckle member body 5b as
a matter of course. An upper end of the upper screw member 5c is
fixed to a lower end of the anchor bolt 6.
[0230] The anchor bolt 6 includes a flange member 6a for preventing
coming off provided at a position immediately above a lower most
portion and a male screw 6b at an uppermost position respectively
and the male screw 6b has a nut 6c which is screwed thereon in
advance, as shown in FIGS. 1(a) and (b).
[0231] The anchor bolt 6 is installed upright on the hollow bolt 1b
by connecting the turn buckle member 5 and the hinge member 4 to
the lower end thereof from above in this sequence, and screwing the
ball head lock nut 7 which is connected to the lower side thereof
onto the hollow bolt 1b of the mounting member 1. In this manner,
the anchor bolt 6 is installed upright on the corresponding center
mark ca with the axial center thereof aligned vertically therewith
as shown in FIG. 1(b).
[0232] Subsequently, the height of the anchor bolt 6 is adjusted by
rotating the turn buckle member body 5b of the turn buckle member 5
as needed, and then concrete is cast. Example 1 is an example of
the case in which concrete for both of the base portion and the
rising portion are cast in one step, so called monoblock casting,
and hence concrete is cast in this manner.
[0233] The anchor bolt 6 is subjected to a corresponding pressure
by the casting of concrete as described above. Since the anchor
bolt 6 is connected to the hollow bolt 1b of the mounting member 1
via the hinge member 4 as described above, and the hinge member 4
is formed of flexible tube member, it can be bent in any directions
through 360.degree. at this portion and hence it is inclined by the
casting pressure from concrete 8 in the corresponding direction as
indicated by a chain line in FIG. 2.
[0234] Since it is inclined according to the casting pressure as
described above, most part of the pressure can be released at this
portion, and consequently, the hollow bolt 1b and the base seat 1a
connected therewith are prevented from being exerted with an
external force which is larger than necessary. Therefore, the
mounting member 1 can be maintained reliably in a state of
initially installed on the leveling concrete 2.
[0235] Subsequently, a plummet instrument 9 is set on the upper end
of the anchor bolt 6 immediately, before the concrete 8 is
hardened, and the anchor bolt 6 is restored to the vertical state
while checking a verticality measuring section 9a of the plummet
instrument 9 as shown in FIG. 2. Then, as shown in FIG. 3, this
state is maintained by a verticality holder (holding means) 10
until the concrete 8 is hardened. The plummet instrument 9 is kept
to be set on the anchor bolt 6. It is for allowing check out of the
verticality when making the rounds thereafter.
[0236] The plummet instrument 9 is composed of the verticality
measuring section 9a and a pipe member 9b to be fitted on the
anchor bolt 6 or the like as shown in FIG. 19(a). The verticality
measuring section 9a employs a structure to measure the verticality
by the position of an air ball in liquid positioned at a center of
an upper surface. The pipe member 9b is formed to have an inner
diameter slightly larger than the outer diameter of the anchor bolt
6 to be measured and, as shown in FIG. 19(d), and the inner
periphery thereof is formed with a plurality of projecting ridges
extending along the axial direction over the entire inner periphery
at regular angular intervals. A diameter of a circle formed by
connecting apexes of the plurality of projecting ridges is set to
slightly exceed the outer diameter of the anchor bolt 6 to be
measured. A lower end of the pipe member 9b is formed so as to be
widened gradually downward as shown in FIG. 19(a).
[0237] As shown in FIG. 2 and FIG. 3, the plummet instrument 9 can
be set to the anchor bolt 6 easily and reliably by fitting the pipe
member 9b on the upper end of the anchor bolt 6. Then, after having
set plummet instrument 9 as described above, the anchor bolt 6 is
moved to the opposite direction from the direction of inclination,
that is, toward the vertical direction, and then the verticality is
checked out by the plummet instrument 9. If it is not yet in the
vertical state, it is fine adjusted to the opposite direction from
the direction of inclination which can be seen from the plummet
instrument 9 and the verticality is checked out again. By repeating
this operation several times, the vertical state of the anchor bolt
6 can be secured accurately.
[0238] As shown in FIGS. 18(a) to (d), the verticality holder 10
includes two band-shaped holding strips 10a, 10a that can be bent
at a center thereof, an anchor holding hole 10b opened at a center
of the bending portion, and magnets 10c arranged at positions near
both ends of the band-shaped holding strips 10a, 10a.
[0239] After the anchor bolt 6 is positioned in the vertical state,
the verticality holder 10 is fitted on the anchor bolt 6 through
the anchor holding hole 10b, and then, as shown in FIG. 3 and FIG.
18(c), the band-shaped holding strips 10a, 10a are widened to a
substantially linear state, and the magnets 10c at the both ends
are fixedly attached to upper ends of concrete forms k, k on both
sides, whereby the verticality of the anchor bolt 6 is
maintained.
[0240] The verticality holder 10 is also able to maintain the
anchor bolt 6 in the vertical state by fitting the anchor holding
hole 10b on the anchor bolt 6, bending the band shaped holding
strips 10a, 10a into a substantially V-shape as shown in FIG.
18(d), and fixedly attaching to the upper end of the concrete frame
k on one side.
[0241] The verticality holder 10 is simply for holding the anchor
bolt 6 until the concrete 8 is hardened, and is extremely simple in
structure. However, it is sufficient because it is not predicted
that it is subjected to a large external force during this period.
Since the verticality holder 10 has such a simple structure, it
will not be a hindrance when adjusting the top end level of the
rising portion of the foundation.
[0242] After the concrete 8 has hardened, the verticality holder 10
and the plummet instrument 9 are removed from the anchor bolt 6.
The anchor bolt 6 must be maintained in the vertical state at this
moment, and if so, the axial center thereof and the center mark ca
on the leveling concrete 2 must be vertically aligned. Therefore,
it is positioned with a high degree of accuracy with an extremely
simple operation. FIG. 4 shows this state.
EXAMPLE 2
[0243] Example 2 relates to the method of positioning the anchor
bolt 6 in the case in which the foundation is constructed by
casting concrete for the base portion and the rising portion in two
steps.
[0244] The procedure until the center marks ca, ca . . . , cs, cs .
. . are positioned and indicated on the leveling concrete 2 is
exactly the same as Example 1.
[0245] In Example 2 as well, the mounting member 1 having the
hollow bolt 1b with the base seat 1a which is the same as Example 1
is installed so as to match the corresponding center mark ca. The
method of positioning the mounting member 1 in this case is the
same as those described in Example 1. However, in Example 2, the
more accurate verticality of the hollow bolt 1b which extends
upright from the mounting member 1 is required. In this case, the
base seat 1a is positioned, and is temporarily fixed as shown in
FIG. 6(a), and then the ball head lock nut 7 with an extension
shaft 7b extending upright from an upper surface thereof is screwed
into the hollow bolt 1b provided above, and then the plummet
instrument 9 is set to the extension shaft 7b as shown in FIG.
6(b), and a mounting state of the base seat 1a is adjusted so that
the verticality of the extension shaft 7b can be secured.
[0246] When it is found that the base seat 1a is inclined by
measurement using the plummet instrument 9, a suitable plate shaped
member is inserted to a required portion between a lower surface of
the base seat 1a and an upper surface of the leveling concrete 2 to
adjust the inclination. For example, as shown in FIG. 14, a
triangular shaped portion may be cut off using the notched groove m
at the corner of the base seat 1a, and used as a member to be
inserted at the required portion between the lower surface of the
base seat 1a and the upper surface of the leveling concrete 2.
After the verticality of the extension shaft 7b is secured, the
base seat 1a is fixed on the leveling concrete reliably by concrete
screws, adhesive agent, or the like.
[0247] Subsequently, as shown in FIG. 7, concrete 18 for the base
portion is cast. The concrete 18 for the base portion is cast to a
level near immediately below an upper end of the extension shaft 7b
extended upright from the ball head lock nut 7 which is screwed
into the hollow bolt 1b as shown in FIG. 7. The length of the
extension shaft 7b should be set to comply with such an usage
condition.
[0248] In FIG. 7, the plummet instrument 9 is set at the upper end
of the extension shaft 7b, and it is for checking out the
verticality of the extension shaft 7b. Since the concrete 18 for
the base portion is thin, the extension shaft 7b does not incline
in this stage as long as it is fixed firmly to some extent.
[0249] Subsequently, when the concrete 18 for the base portion is
hardened to some extent, the anchor bolt 6 is disposed upright on
the upper end of the extension shaft 7b via the hinge member 4 and
the turn buckle member 5 as shown in FIG. 8. FIG. 5 shows a general
image of a connected state in this case. The hinge member 4 and the
turn buckle member 5 have exactly the same structures as those in
Example 1. On the other hand, a volute joint 7a is configured on
the upper end of the extension shaft 7b as shown in FIG. 8, and
hence the anchor bolt 6 can be disposed upright by inserting and
connecting the volute joint 7a into the insertion joint end at the
lower end of the hinge member 4.
[0250] Then, a turn buckle member body 5b of the turn buckle member
5 is rotated as needed to adjust the length (height), and then
concrete 28 for the rising portion of the foundation is cast as
shown in FIG. 9.
[0251] The anchor bolt 6 is subjected to the casting pressure by
the casting of the concrete 28, is inclined in the direction
corresponding to the pressure at a portion of the hinge member 4 to
release the casting pressure as described in Example 1.
Consequently, a force more than necessary is not exerted to the
extension shaft 7b, and the extension shaft 7b maintains a state in
which the upper end thereof is accurately positioned vertically
above the center mark ca.
[0252] Subsequently, as in the case of Example 1 and as shown in
FIG. 9, immediately, that is, before the concrete 28 is hardened,
the plummet instrument 9 like the one in Example 1 is set to the
upper end of the anchor bolt 6 to restore the anchor bolt 6 into
the vertical state while checking out with the plummet instrument
9, and the anchor bolt 6 is maintained in this state by the
verticality holder 10 until the concrete 28 is hardened. The
verticality holder 10 is the same as that described in Example 1,
and the verticality of the anchor bolt 6 can be maintained in the
same manner. The plummet instrument 9 is kept to be set on the
anchor bolt 6 in this case as well.
[0253] The subsequent operation is exactly the same as the one
described in Example 1, and the anchor bolt 6 must be maintained in
the vertical state at this moment, and if so, as described in
Example 1, the axial center thereof and the center mark ca on the
leveling concrete 2 must be vertically aligned. Therefore, the
anchor bolt 6 is positioned and installed on the foundation
accurately with the extremely simple operation.
EXAMPLE 3
[0254] Example 3 relates to a method of positioning the anchor bolt
6 in the case in which the foundation is constructed in two steps
by casting concrete for the base portion and the rising portion as
in the case of Example 2, and is different from Example 2 in the
process after positioning and indication of the center marks ca, ca
. . . and cs, cs . . . on the leveling concrete 2 until upright
disposition and fixation of the extension shaft 7b. Since the
different point is only the process described above, only the
different point will be described.
[0255] As shown in FIG. 10(a), a drill d is aligned with the
corresponding center mark ca on the leveling concrete 2 and a
mounting hole hm is drilled. Then, as shown in FIG. 10(b), a plug
member p is press fitted and fixed in the mounting hole hm.
Subsequently, as shown in FIG. 10(c), a screw member 1e is provided
as the anchor bolt mounting means at the lower end of the extension
shaft 7b, and the extension shaft 7b provided with a flange body 1f
at a boundary with the screw member 1e is installed in the mounting
hole hm. This is achieved by screwing the screw member 1e into the
mounting hole hm using a cross groove 7c formed on the upper end of
the extension shaft 7b, as shown in FIG. 10(d). At this time, the
screw member 1e is fixed by being screwed and advanced into the
plug member p, as shown in FIG. 10(c).
[0256] As shown in the same drawing, the extension shaft 7b is
extended upright on the corresponding center mark ca on the
leveling concrete 2. Subsequently, as shown in FIG. 11, a
reinforcing pipe 11 having a reinforcing flange 11a protruding from
a lower end in the peripheral direction is fitted thereon, and then
as shown in FIG. 12, the plummet instrument 9 is set thereon,
whereby the reinforcing flange 11a is fixed on the leveling
concrete 2 while checking out the verticality of the extension
shaft 7b reinforced with the reinforcing pipe 11 fitted thereon.
The verticality is secured by adjustment by inserting a plate
member or the like between a corresponding portion on a lower
surface of the reinforcing flange 11a and a corresponding portion
on the upper surface of the leveling concrete 2 as needed. Fixation
of the reinforcing flange 11a is performed by using adhesive agent,
concrete nails or the concrete screws 3, 3 . . . .
[0257] After the extension shaft 7b is secured to the vertical
state in this manner and reinforced by the reinforcing pipe 11, the
post process is performed in the procedure as described in Example
2. That is, concrete for the base portion is cast, and after the
concrete is substantially hardened, the extension shaft 7b is
connected to the lower end of the anchor bolt 6 via the turn buckle
member 5 and the hinge member 4 (the extension shaft 7b is
connected directly by inserting the volute joint 7a thereof into
the insertion joint end at the lower end of the hinge member
4).
EXAMPLE 4
[0258] Example 4 relates to an example of a method of positioning
and installing an anchor bolt unit 16 including the plurality of
anchor bolts 6, 6 . . . set together on the center marks ca, ca . .
. .
[0259] As shown in FIG. 13(a), the anchor bolt unit 16 includes the
plurality of anchor bolts 6, 6 . . . joined together using upper
and lower templates 12, 12 in the same positional relation as the
positional relation to be achieved when being mounted to the
foundation. The upper and lower templates 12 include connecting
holes opened in a positional relation corresponding to each other
in the vertical direction, and portions of the anchor bolts 6, 6 .
. . near the upper and lower ends thereof are inserted
therethrough, and the respective ends are fixedly tightened to
their positions with nuts n, n screwed on upper and lower sides of
the templates 12, 12.
[0260] The connecting hole is opened at a center of the upper
template 12 of the anchor bolt unit 16, a reference center shaft 13
is passed therethrough, and is fixedly tightened with the nut n, n
screwed thereto on the upper and lower sides of the template 12.
The reference center shaft 13 is positioned so that the axial
centers of the anchor bolts 6, 6 . . . in the unit match vertically
with the corresponding center marks ca, ca . . . on the leveling
concrete 2 when the reference center shaft 13 is in the positional
relation in which the axial center thereof is aligned vertically
with the center mark cs in the vertical state.
[0261] The reference center shaft 13 includes, as shown in FIG.
13(a), a shaft body 13a which constitutes an outer layer, and a
core member 13b of a smaller diameter constituting the axial center
thereof. The shaft body 13a and the core member 13b are both formed
of hard plastic which can be cut, and are colored in different
colors from each other.
[0262] The anchor bolt unit 16 is connected to the ball head lock
nut 7 screwed onto the hollow bolt 1b of the mounting member 1 via
the turn buckle member 5 and a hinge member 14.
[0263] The turn buckle member 5 is the same as the one described in
Example 1. The upper end of the screw member 5c screwed into the
upper portion of the turn buckle member body 5b is fixedly
suspended from a center of the lower template 12 of the anchor bolt
unit 16. In other words, the suspending position of the screw
member 5c is exactly in a vertically matching relation with the
reference center shaft 13.
[0264] The hinge member 14 is formed of a flexible single-layer
rubber column having joint ends at both ends, and the lower end of
the screw member 5a on the lower side of the turn buckle member 5
is fixedly provided at a center of the upper joint end, and an
upper surface of the ball head lock nut 7 is fixedly provided at
the lower joint end of the hinge member 14.
[0265] The mounting member 1 has the same structure as that
described in Example 1. The ball head lock nut 7 is also the same
as that described in Example 1.
[0266] In Example 4 as well, the procedure of the installation of
the leveling concrete 2 to the positioning and indication of the
center marks ca, ca . . . , cs, cs . . . thereon is to be performed
in the exactly the same manner as in Examples 1 to 3 as a matter of
course. The method of mounting the base seat 1a on the leveling
concrete 2 is also exactly the same. However, in this case, it is
mounted so as to mach the corresponding center mark cs for the
reference center shaft 13, which is the only different point. It is
needless to say that the way match them is also the same.
[0267] In this manner, the anchor bolt unit 16 is connected to the
hollow bolt 1b of the mounting member 1 fixedly installed while
matching with the corresponding center mark cs on the leveling
concrete 2 via the hinge member 14 and the turn buckle member 5.
This connection is, as will be understood from the description
above, performed by screwing the ball head lock nut 7 connected to
the lower end of the hinge member 14 onto the hollow bolt 1b. The
anchor bolt unit 16 disposed upright from the hollow bolt 1b in
this manner is connected by auxiliary springs 15 between the both
ends of the lower template 12 and outer edges of the base seat 1a
in order to keep the stable posture. This connecting is achieved by
attaching hooks, not shown, to the both ends of the temperate 12
and the outer edges of the base seat 1a in advance and engaging the
springs therewith.
[0268] Subsequently, the height of the anchor bolts 6, 6 . . . of
the anchor bolt unit 16 is adjusted by rotating the turn buckle
member body 5b of the turn buckle member 5 as needed, concrete for
the base portion and the rising portion of the foundation is cast
simultaneously, and before the concrete is hardened, the anchor
bolt unit 16 which is inclined by the casting pressure of the
concrete is restored to the vertical state.
[0269] This can be achieved by setting the plummet instrument 9 on
the reference center shaft 13 and moving the same to secure the
verticality thereof. Since the reference center shaft 13 is
arranged in parallel with all the anchor bolts 6, 6 . . . in the
unit, when the reference center shaft 13 is corrected to the
vertical state, the verticality of all other anchor bolts 6, 6 . .
. can be secured simultaneously. The plummet instrument 9 is the
same as the one described in Example 1 and so on, and is used in
the same manner.
[0270] The reference center shaft 13 adjusted to the vertical state
is maintained in the vertical state by the verticality holder 10
until the concrete is hardened. The verticality holder 10 is the
one described in Example 1, and is used in the same manner as the
matter of course. As described above, the verticality holder 10 is
simple holding means, it will not be a hindrance when adjusting the
top end level of the foundation.
[0271] After the concrete is hardened, the verticality holder 10 is
removed. If the plummet instrument 9 is still set thereon, it is
also removed. The upper template 12 is also removed from anchor
bolts 6, 6 . . . and the reference center shaft 13 by removing the
nuts n, n . . . . The reference center shaft 13 is cut off at the
top end level of the rising portion of the foundation.
[0272] When the positioning is performed using the anchor bolt unit
16, positioning of the plurality of anchor bolts 6, 6 . . . can be
achieved effectively at once. Accurate positioning of the
respective anchor bolts 6, 6 . . . is totally achieved accurately
as long as the verticality of the reference center shaft 13 is
maintained, as will be understood from the description above.
[0273] The core member 13b of a smaller diameter which constitutes
the axial center appears on a sectional surface of the reference
center shaft 13 which appears on the top end of the rising portion
of the foundation, which corresponds to the center mark cs
positioned on the upper surface of the leveling concrete 2 moved
accurately upward, and hence it can be used as an original point of
the reference center line to be indicated on the top end of the
rising portion of the foundation.
EXAMPLE 5
[0274] This is an example of the anchor bolt mounting means to be
mounted so as to match the center marks ca, cs positioned and
indicated on the leveling concrete 2, and as shown in FIG. 15(a),
and of a mounting member 21 of ore anchor type as shown in FIG.
15(a), in which a mounting hole is drilled at a predetermined
portion of the leveling concrete 2, the mounting member 21 is
inserted into the mounting hole and hammered thereon from above, a
taper member 21a at a lower end is entered into a cylindrical body
21b, whereby a lower portion of the cylindrical body 21b is
enlarged and fixed to the mounting hole.
[0275] A bolt member 21d provided with a volute joint 21c at an
upper portion is screwed into an upper portion of the cylindrical
body 21b, so that the volute joint 21c can be connected to the
hinge member 4 described in Example 1 and so on. This can be used
instead of the mounting member 1 formed of the hollow bolt 1b with
the base seat 1a.
EXAMPLE 6
[0276] This is also an example of the anchor bolt mounting means to
be mounted so as to match the center marks ca, cs positioned and
indicated on the leveling concrete 2 and, as shown in FIG. 15(b),
is a mounting member 31 being composed of a mounting nut 31b with a
base seat 31a and having a viewing hole 31c opened at a center
thereof. The viewing hole 31c is formed with two sector-shaped
projecting strips so as to project with apexes thereof opposes to
each other. The base seat 31a is formed with screw holes, notches
and notched grooves like on the base seat 1a in Example 1.
[0277] A bolt member 31e provided with a volute joint 31d at an
upper end thereof is screwed into the mounting nut 31b, so that the
volute joint 31d can be connected to the hinge member 4 described
in Example 1. It can be used instead of the mounting member 1
formed of the hollow bolt 1b with the base seat 1a.
EXAMPLE 7
[0278] This is an example relating to means for supporting the
anchor bolt unit 16 before casting concrete in order to stabilize
the posture, and as shown in FIG. 13(b), to supporting poles 25, 25
which are fixedly provided so as to suspend from the lower template
12 which supports the anchor bolts 6, 6 while maintaining the
mutual positional relation thereof. These supporting poles 25, 25
are set to such a length that lower ends can only reach positions
slightly apart from the base seat 1a of the mounting member 1, and
support the anchor bolt unit 16 so as to allow inclination within a
certain range and avoid further inclination.
[0279] Other components of the anchor bolt unit 16 in this example
are completely the same as those in Example 4.
EXAMPLE 8
[0280] This is also an example relating to means for supporting the
anchor bolt unit 16 before casting concrete in order to stabilize
the posture, and as shown in FIG. 13(c), to supporting poles 35, 35
which are fixedly provided so as to suspend from the same position
as the previous example on the lower template 12 with dampers 35a
provided in midsections thereof. The supporting poles 35, 35 are
set to such a length that lower ends can only reach the base seat
1a of the mounting member 1, and support the anchor bolt unit 16 so
as to allow inclination within a certain range with a resilient
effect of the damper 35a and avoid further inclination.
[0281] Other components of the anchor bolt unit 16 in this example
are also completely the same as those in Example 4.
EXAMPLE 9
[0282] An adaptor 19 of the plummet instrument 9 used when
performing the method of accurately positioning the anchor bolt
will be described.
[0283] This includes a flange body 19a protruding at a lower end
and an adjusting pipe member 19b having the flange body 19a along
an outer periphery of the lower end, as shown in FIG. 19(b). The
adjusting pipe member 19b has an outer diameter which can be
inserted into the plummet instrument 9 smoothly without looseness,
and an inner diameter corresponds to the outer diameter of the
anchor bolt or the like with a small diameter which cannot be
measured by the plummet instrument 9 and must be measured. More
specifically, it is formed so as to be slightly larger than the
outer diameter of the object to be measured having a small diameter
and, as shown in FIG. 19(e), is formed with a plurality of
projecting ridges extending from the inner periphery thereof along
the axial direction over the entire inner periphery at regular
angular intervals. In this case, a diameter of a circle formed by
connecting apexes of the plurality of projecting ridges is set to
slightly exceed the outer diameter of the object to be measured
with a small diameter.
[0284] The lower end of the adjusting pipe member 19b is formed
into a shape widened gradually downward, as shown in FIG.
19(b).
[0285] This adaptor 19 is, therefore, used by inserting the
adjusting pipe member 19b into the pipe member 9b of the plummet
instrument 9, as shown in FIG. 19(c). FIG. 20(a) shows a sate in
which the pipe member 9b of the plummet instrument 9 is directly
fitted on the reference center shaft 13 with a large diameter
without using the adapter 19, and FIG. 20(b) shows a state in which
the plummet instrument 9 having the adapter 19 set thereon is
fitted on the upper end of the anchor bolt 6 with a small diameter.
The anchor bolt 6 with a small diameter or the like can be set
without looseness by setting the adapter 19 and fitted on the
latter adjusting pipe member 19b, so that further accurate
measurement of the verticality is enabled.
EXAMPLE 10
[0286] An inspection tool for the plummet instrument 9 used when
performing the method of accurately positioning the anchor blot
will be described.
[0287] The inspection tool 29 includes, as shown in FIG. 17(a), a
disc-shaped float 29a, a set shaft 29b extended upright from a
center of an upper portion thereof, and a plumb bob shaft 29c
suspended from a center of a lower portion of the float 29a.
[0288] The float 29a is floated in water in an appropriate water
container, and then the plummet instrument 9 to be inspected is set
to the set shaft 29b on an upper side thereof and, if the
verticality measuring section 9a indicates verticality in a state
in which the inspection tool 29 is stable state, the plummet
instrument 9 can be determined to be normal. It is suitable for
inspecting a number of plummet instruments 9 before use.
EXAMPLE 11
[0289] Another inspection tool for the plummet instrument 9 used
when performing the method of accurately positioning the anchor
bolt will be described.
[0290] The inspection tool 39 includes, as shown in FIG. 17(b), a
band-shaped base plate 39a, an universal joint mechanism 39b
provided near one end thereof, a set shaft 39c extending upright
with the intermediary of the universal joint mechanism 39b, and a
plumb bob shaft 39d extending downward via the universal joint
mechanism 39b.
[0291] An end of the base plate 39a is mounted to an appropriate
portion and the universal joint mechanism 39b side is kept up in
the air, the plummet instrument 9 to be inspected is set on the set
shaft 39b on an upper side thereof and, if the verticality
measuring section 9a indicates verticality in a state in which the
universal joint mechanism 39b is kept in a stable state, the
plummet instrument 9 can be determined to be normal. It is
convenient for inspecting a number of plummet instruments 9 before
use.
INDUSTRIAL APPLICABILITY
[0292] The present invention can achieve accurate positioning of an
anchor bolt on the foundation in a simple procedure using members
of an extremely simple structure without using a temporary
reference construction, when building a foundation for a building,
and may be utilized effectively in the industrial field in which
various buildings are constructed.
* * * * *