U.S. patent application number 11/430125 was filed with the patent office on 2006-11-30 for joint structure of iron framework and coupling member for connecting rectangular steel beam to rectangular steel column.
Invention is credited to Minoru Hiragaki.
Application Number | 20060265992 11/430125 |
Document ID | / |
Family ID | 36032099 |
Filed Date | 2006-11-30 |
United States Patent
Application |
20060265992 |
Kind Code |
A1 |
Hiragaki; Minoru |
November 30, 2006 |
Joint structure of iron framework and coupling member for
connecting rectangular steel beam to rectangular steel column
Abstract
The present invention provides a joint structure of iron
framework capable of enhancing workability and strength. The joint
structure of iron framework 1 is a joint structure of iron
framework for connecting a hollow rectangular steel beam 4 to a
hollow rectangular steel column 2 via a coupling member 3. The
coupling member 3 includes: a rectangular cylinder 31 fitted to an
outer periphery of the hollow rectangular steel column 4 and firmly
attached to the hollow rectangular steel column 4; a U-shaped
receiving member 4 provided to a side surface of the rectangular
cylinder 31 for connecting the hollow rectangular steel beam 4, the
U-shaped receiving member 32 having a bottom portion 32b protruded
from the side surface of the rectangular cylinder 31, having a
U-shaped opening portion 32 located to face upward, having a
U-shaped end surface firmly attached to the side surface of the
rectangular cylinder 31; and a lid 33 firmly attached to the
U-shaped receiving member 32 in a state of covering the upper
surface of the hollow rectangular steel beam 4 mounted in the
U-shaped receiving member 32.
Inventors: |
Hiragaki; Minoru;
(Shizuoka-shi, JP) |
Correspondence
Address: |
KANESAKA BERNER AND PARTNERS LLP
SUITE 300, 1700 DIAGONAL RD
ALEXANDRIA
VA
22314-2848
US
|
Family ID: |
36032099 |
Appl. No.: |
11/430125 |
Filed: |
May 9, 2006 |
Current U.S.
Class: |
52/633 |
Current CPC
Class: |
E04B 2001/2406 20130101;
E04B 2001/2457 20130101; E04B 5/43 20130101; E04B 2001/2421
20130101; E04C 2003/0465 20130101; E04C 2003/043 20130101; E04B
1/2403 20130101; E04B 2001/2451 20130101; E04B 2001/2418
20130101 |
Class at
Publication: |
052/633 |
International
Class: |
E04C 3/02 20060101
E04C003/02 |
Foreign Application Data
Date |
Code |
Application Number |
May 24, 2005 |
JP |
2005-150513 |
Claims
1. A joint structure of iron framework for connecting a hollow
rectangular steel beam to a hollow rectangular steel column via a
coupling member, wherein the coupling member comprising: a
rectangular cylinder fitted to an outer periphery of the hollow
rectangular steel column and firmly attached to the hollow
rectangular steel column; a U-shaped receiving member provided to a
side surface of the rectangular cylinder for connecting the hollow
rectangular steel beam, the U-shaped receiving member having a
bottom portion protruded from the side surface of the rectangular
cylinder, having a U-shaped opening portion located to face upward,
having a U-shaped end surface firmly attached to the side surface
of the rectangular cylinder; and a lid firmly attached to the
U-shaped receiving member in a state of covering the upper surface
of the hollow rectangular steel beam mounted in the U-shaped
receiving member.
2. The joint structure of iron framework according to claim 1,
wherein a slit is formed on each side surface of a rectangular
cylinder, and the rectangular cylinder is firmly attached to a
hollow rectangular steel column via the slit.
3. The joint structure of iron framework according to claim 1,
wherein the bottom portion of the U-shaped receiving member is
formed with a bottom bolt hole for allowing a bolt to pass
therethrough, a right rising portion which is one of the sides
rising from the bottom portion is formed with a right bolt hole for
allowing a bolt to pass therethrough, and a left rising portion
which is the other side rising from the bottom portion is formed
with a left bolt hole, respectively, and wherein the bottom surface
of the hollow rectangular steel beam is formed with a bottom
surface bolt hole corresponding to the bottom bolt hole, and the
left side surface of the hollow rectangular steel beam is formed
with a left side surface bolt hole corresponding to the left bolt
hole, and a left side surface of the hollow rectangular steel beam
is formed with a left side surface bolt hole corresponding to the
left bolt hole, wherein the upper surface of the hollow rectangular
steel beam is formed with a hand insertion hole of a size allowing
a hand to enter therein, and wherein the U-shaped receiving member
and the hollow rectangular steel beam are connected to each other
by the bottom bolt and the bottom nut via the bottom bolt hole and
the bottom surface bolt hole, by the left bolt and the left nut via
the left bolt hole and the left side surface bolt hole, and by the
right bolt and the right nut via the right bolt hole and the right
side surface bolt hole.
4. The joint structure of iron framework according to claim 1,
wherein the bottom portion of the U-shaped receiving member is
formed with a bottom bolt hole for allowing a bolt to pass
therethrough, a surface of a right rising portion which is one of
the sides rising from the bottom portion of the U-shaped receiving
member is formed with a right bolt hole for allowing a bolt to pass
therethrough, and a surface of a left rising portion which is the
other side rising from the bottom portion is formed with a left
bolt hole, respectively; wherein the bottom surface of the hollow
rectangular steel beam is formed with a bottom surface bolt hole
corresponding to the bottom bolt hole, and the left side surface of
the hollow rectangular steel beam is formed with a left side
surface bolt hole corresponding to the left bolt hole, and a left
side surface of the hollow rectangular steel beam is formed with a
left side surface bolt hole corresponding to the left bolt hole;
wherein the side surface of the hollow rectangular steel beam is
formed with a hand insertion hole of a size allowing a hand to
enter therein; wherein a surface of the right rising portion or a
surface of the left rising portion is formed with a hand insertion
hole of rising portion's side surface corresponding to the hand
insertion hole of rectangular beam's side surface; and wherein the
U-shaped receiving member and the hollow rectangular steel beam are
connected to each other by the bottom bolt and the bottom nut via
the bottom bolt hole and the bottom surface bolt hole, by the left
bolt and the left nut via the left bolt hole and the left side
surface bolt hole, and by the right bolt and the right nut via the
right bolt hole and the right side surface bolt hole.
5. The joint structure of iron framework according to claim 1,
wherein a lid is in a rectangular shape when viewed along its
plane, wherein one side of the rectangle facing to the hollow
rectangular steel column is firmly attached to a rectangular
cylinder by welding; wherein another side of the rectangle facing
to the right rising portion which is one of the sides rising from
the U-shaped receiving member is firmly attached to the right
rising portion by welding; wherein still another of the rectangle
facing to the left rising portion which is the other side rising
from the U-shaped receiving member is firmly attached to the left
rising portion by welding; wherein the remaining one side of the
rectangle facing to the upper surface of the hollow rectangular
steel beam is firmly attached to the hollow rectangular steel beam;
and wherein the lid is formed with slits, and the lid is firmly
attached to the hollow rectangular steel beam via the slits.
6. The joint structure of iron framework according to claim 1,
wherein a reinforcing member is provided to traverse the hollow
rectangular steel column along its longitudinal direction.
7. The joint structure of iron framework according to claim 1,
wherein a reinforcing member is provided to traverse the hollow
rectangular steel beam along its longitudinal direction.
8. The joint structure of iron framework according to claim 1,
wherein a reinforcing member is provided to traverse the hollow
rectangular steel beam along its longitudinal direction.
9. The joint structure of iron framework according to claim 1,
wherein a plurality of reinforcing members are provided to traverse
the hollow rectangular steel beam in its longitudinal direction,
and a grout material is injected in a space between the reinforcing
members.
10. The joint structure of iron framework according to claim 1,
wherein the U-shaped receiving member includes: an L-shaped
receiving member without either one of the right rising portion and
the left rising portion rising from the bottom portion; and a
flat-shaped member connected to the bottom portion of the L-shaped
receiving member by welding at a position having no rising portion
so as to form a U shape in cross section.
11. A coupling member including: a rectangular cylinder fitted to
an outer periphery of a hollow rectangular steel column and firmly
attached to a hollow rectangular steel column; a U-shaped receiving
member provided to a side surface of the rectangular cylinder, the
U-shaped receiving member having a bottom portion protruded from
the side surface of the rectangular cylinder, having a U-shaped
opening portion located to face upward, having a U-shaped end
surface firmly attached to the side surface of the rectangular
cylinder; and a lid firmly attached to the U-shaped receiving
member in a state of covering the upper surface of the hollow
rectangular steel beam mounted in the U-shaped receiving
Description
BACKGROUD OF THE INVENTION
[0001] 1. Field of the Invention
[0002] The present invention relates to a joint structure of iron
framework and a coupling member for connecting rectangular steel
beam to rectangular steel column, and specifically, relates to a
joint structure of iron framework and a coupling member for
connecting a rectangular steel beam to a rectangular steel column
capable of enhancing workability and strength.
[0003] 2. Description of the Related Art
[0004] Conventionally, there is a joint structure of iron framework
for connecting an H-shaped steel beam to a hollow rectangular steel
column (for example, see non-patent document 1).
[0005] In this joint structure, some midpoint of a hollow
rectangular steel column is cut. Then, an H-shaped steel beam is
connected to the hollow rectangular steel column by welding via a
member called diaphragm so as to enhance the rigidity of the joint
therebetween.
[0006] However, this joint structure of iron framework requires
cutting of some midpoint of a hollow rectangular steel column, and
this cutting operation lowers the workability. In addition, the
H-shaped steel beam is connected to the hollow rectangular steel
column, and this beam has a problem that it is weak against a load
applied thereto from its side direction (i.e. horizontal load).
[0007] [Non-patent document 1] "Easy-to-make Iron framework design
demonstrated by illustrative examples", on page 47, edited by
Japanese Society of Steel Construction, (second edition)
SUMMARY OF THE INVENTION
[0008] To solve the abovementioned problems, an object of the
present invention is to provide a joint structure of iron
framework, and a coupling member for connecting a rectangular steel
beam to a rectangular steel column.
[0009] To achieve the object described above, according to the
present invention, there is provided a joint structure of iron
framework for connecting a hollow rectangular steel beam to a
hollow rectangular steel column via a coupling member, wherein the
coupling member comprising: a rectangular cylinder fitted to an
outer periphery of the hollow rectangular steel column and firmly
attached to the hollow rectangular steel column; a U-shaped
receiving member provided to a side surface of the rectangular
cylinder for connecting the hollow rectangular steel beam, the
U-shaped receiving member having a bottom portion protruded from
the side surface of the rectangular cylinder, having a U-shaped
opening portion located to face upward, having a U-shaped end
surface firmly attached to the side surface of the rectangular
cylinder; and a lid firmly attached to the U-shaped receiving
member in a state of covering the upper surface of the hollow
rectangular steel beam mounted in the U-shaped receiving
member.
[0010] According to the invention claimed in claim 2, in the joint
structure of iron framework claimed in claim 1, a slit is formed on
each side surface of a rectangular cylinder, and the rectangular
cylinder is firmly attached to a hollow rectangular steel column
via the slit.
[0011] According to the invention claimed in claim 3, in the joint
structure of iron framework claimed in claim 1, the bottom portion
of the U-shaped receiving member is formed with a bottom bolt hole
for allowing a bolt to pass therethrough, a right rising portion
which is one of the sides rising from the bottom portion is formed
with a right bolt hole for allowing a bolt to pass therethrough,
and a left rising portion which is the other side rising from the
bottom portion is formed with a left bolt hole, respectively, and
wherein the bottom surface of the hollow rectangular steel beam is
formed with a bottom surface bolt hole corresponding to the bottom
bolt hole, and the left side surface of the hollow rectangular
steel beam is formed with a left side surface bolt hole
corresponding to the left bolt hole, and a left side surface of the
hollow rectangular steel beam is formed with a left side surface
bolt hole corresponding to the left bolt hole, wherein the upper
surface of the hollow rectangular steel beam is formed with a hand
insertion hole of a size allowing a hand to enter therein, and
wherein the U-shaped receiving member and the hollow rectangular
steel beam are connected to each other by the bottom bolt and the
bottom nut via the bottom bolt hole and the bottom surface bolt
hole, by the left bolt and the left nut via the left bolt hole and
the left side surface bolt hole, and by the right bolt and the
right nut via the right bolt hole and the right side surface bolt
hole.
[0012] According to the invention claimed in claim 4, in the joint
structure of iron framework claimed in claim 1, the bottom portion
of the U-shaped receiving member is formed with a bottom bolt hole
for allowing a bolt to pass therethrough, a surface of a right
rising portion which is one of the sides rising from the bottom
portion of the U-shaped receiving member is formed with a right
bolt hole for allowing a bolt to pass therethrough, and a surface
of a left rising portion which is the other side rising from the
bottom portion is formed with a left bolt hole, respectively;
wherein the bottom surface of the hollow rectangular steel beam is
formed with a bottom surface bolt hole corresponding to the bottom
bolt hole, and the left side surface of the hollow rectangular
steel beam is formed with a left side surface bolt hole
corresponding to the left bolt hole, and a left side surface of the
hollow rectangular steel beam is formed with a left side surface
bolt hole corresponding to the left bolt hole; wherein the side
surface of the hollow rectangular steel beam is formed with a hand
insertion hole of a size allowing a hand to enter therein, wherein
a surface of the right rising portion or a surface of the left
rising portion is formed with a hand insertion hole of rising
portion's side surface corresponding to the hand insertion hole of
rectangular beam's side surface; and wherein the U-shaped receiving
member and the hollow rectangular steel beam are connected to each
other by the bottom bolt and the bottom nut via the bottom bolt
hole and the bottom surface bolt hole, by the left bolt and the
left nut via the left bolt hole and the left side surface bolt
hole, and by the right bolt and the right nut via the right bolt
hole and the right side surface bolt hole.
[0013] According to the invention claimed in claim 5, in the joint
structure of iron framework claimed in claim 1, a lid is in a
rectangular shape when viewed along its plane; wherein one side of
the rectangle facing to the hollow rectangular steel column is
firmly attached to a rectangular cylinder by welding; wherein
another side of the rectangle facing to the right rising portion
which is one of the sides rising from the U-shaped receiving member
is firmly attached to the right rising portion by welding; wherein
still another of the rectangle facing to the left rising portion
which is the other side rising from the U-shaped receiving member
is firmly attached to the left rising portion by welding; wherein
the remaining one side of the rectangle facing to the upper surface
of the hollow rectangular steel beam is firmly attached to the
hollow rectangular steel beam; and wherein the lid is formed with
slits, and the lid is firmly attached to the hollow rectangular
steel beam via the slits.
[0014] According to the invention claimed in claim 6, in the joint
structure of iron framework claimed in claims 1 to 5, a reinforcing
member is provided to traverse the hollow rectangular steel column
along its longitudinal direction.
[0015] According to the invention claimed in claim 7, in the joint
structure of iron framework claimed in claims 1 to 5, a reinforcing
member is provided to traverse the hollow rectangular steel beam
along its longitudinal direction.
[0016] According to the invention claimed in claim 8, in the joint
structure of iron framework claimed in claims 1 to 5, a reinforcing
member is provided to traverse the hollow rectangular steel beam
along its longitudinal direction.
[0017] According to the invention claimed in claim 9, in the joint
structure of iron framework claimed in claims 1 to 5, a plurality
of reinforcing members are provided to traverse the hollow
rectangular steel beam in its longitudinal direction, and a grout
material is injected in a space between the reinforcing
members.
[0018] According to the invention claimed in claim 10, in the joint
structure of iron framework claimed in claims 1 to 5, the U-shaped
receiving member includes: an L-shaped receiving member without
either one of the right rising portion and the left rising portion
rising from the bottom portion; and a flat-shaped member connected
to the bottom portion of the L-shaped receiving member by welding
at a position having no rising portion so as to form a U shape in
cross section.
[0019] According to the invention claimed in claim 11, a coupling
member includes: a rectangular cylinder fitted to an outer
periphery of a hollow rectangular steel column and firmly attached
to a hollow rectangular steel column; a U-shaped receiving member
provided to a side surface of the rectangular cylinder, the
U-shaped receiving member having a bottom portion protruded from
the side surface of the rectangular cylinder, having a U-shaped
opening portion located to face upward, having a U-shaped end
surface firmly attached to the side surface of the rectangular
cylinder; and a lid firmly attached to the U-shaped receiving
member in a state of covering the upper surface of the hollow
rectangular steel beam mounted in the U-shaped receiving
member.
[0020] According to the joint structure of iron framework claimed
in claim 1, it is not needed to cut some midpoint of the hollow
rectangular steel column as in the prior arts. Instead, the
rectangular cylinder of the coupling member is fitted to the outer
periphery of the hollow rectangular steel column and is firmly
attached to the hollow rectangular steel column. As a result, the
workability is enhanced. In addition, since the beam is a hollow
rectangular steel beam unlike a conventional beam having a H-shaped
cross section, the joint structure produces an advantage that the
strength against the lateral loading is increased.
[0021] Further, according to the joint structure of iron framework
claimed in claim 2, in addition to the advantage of the invention
claimed in claim 1 the following advantage is produced. That is,
the side surface of the rectangular cylinder is formed with a slit
and the rectangular cylinder is firmly attached to the hollow
rectangular steel column via the slit. Thus, the rectangular
cylinder can be firmly attached to the hollow rectangular steel
column easily and strongly
[0022] The strength can be adjusted by changing the length, width,
and the like of each slit, or by providing a plurality of
slits.
[0023] Further, according to the joint structure of iron framework
claimed in claim 3, in addition to the advantage of the invention
claimed in claim 1, the following advantage is produced. That is,
the upper surface of the hollow rectangular steel beam is formed
with a hand insertion hole of a size that allows a hand to enter
therein. Thus, the U-shaped receiving member and the hollow
rectangular steel beam are easily connected to each other by the
bottom bolt and the bottom nut via the bottom bolt hole and the
bottom surface bolt hole, by the left bolt and the left nut via the
right bolt hole and the right side surface bolt hole, and by the
right bolt and the right nut via the right bolt and the right side
surface bolt.
[0024] Further, according to the joint structure of iron framework
claimed in claim 4, in addition to the advantage of the invention
claimed in claim 1 described above, the following advantage is
produced. That is, when the height of the side surface of the
hollow rectangular steel beam is large, the left side surface of
the hollow rectangular steel beam is formed with a hand insertion
hole of rectangular beam's left side surface of a size that allows
a hand to enter therein. At the same time, the right side surface
of the hollow rectangular steel beam is formed with a hand
insertion hole of rectangular beam's right side surface of a size
that allows a hand to enter therein. The U-shaped receiving member
and the hollow rectangular can be easily connected to each other by
the left bolt and the left nut via the left bolt hole and left side
surface bolt hole, and by the right bolt and the right nut via the
right bolt hole and the right side surface bolt hole. As a result,
the workability can be enhanced.
[0025] Further, according to the joint structure of iron framework
claimed in claim 5, in addition to the advantage of the invention
claimed in claim 1 above, the following advantage is produced. That
is, since the lid is formed with a slit and the lid is firmly
attached to the hollow rectangular steel beam via the slit, the lid
can be firmly attached to the hollowing rectangular steel beam
easily and strongly.
[0026] The strength can be adjusted by changing the length, width,
and the like of each slit, or by providing a plurality of
slits.
[0027] Further, according to the joint member for connecting a
rectangular steel beam to a rectangular steel column claimed in
claim 11, the rectangular cylinder of the joint member is fitted to
the outer periphery of the hollow rectangular steel column and is
firmly attached to the hollow rectangular steel column without
cutting some midpoint of the hollow rectangular steel column as in
prior arts. As a result, the workability is enhanced. In addition,
since the beam is a hollow rectangular steel beam unlike a
conventional beam having a H-shaped cross section, the joint member
produces an advantage that the strength against the lateral loading
is increased.
BRIEF DESCRIPTION OF THE DRAWINGS
[0028] FIG. 1 is a schematic perspective view of an iron framework
structure using the joint structure of iron framework according to
an embodiment of the present invention.
[0029] FIG. 2 is a schematic perspective view showing a state
before the joint structure of iron framework shown in FIG. 1 is
assembled, where the coupling member is in a state before being
fitted to a hollow rectangular steel column.
[0030] FIG. 3 is a schematic perspective view showing a state where
the coupling member shown in FIG. 2 is firmly attached to a hollow
rectangular steel column and a hollow rectangular steel beam is
before being connected.
[0031] FIG. 4 is a schematic perspective view showing a state where
a hollow rectangular steel beam is placed to a bottom portion of
the coupling member shown in FIG. 3 and the upper surface of the
hollow rectangular steel beam is before being covered with a
lid.
[0032] FIG. 5 is a schematic perspective view showing a state where
a lid is placed to cover the upper surface of a hollow rectangular
steel beam shown in FIG. 4 and the lid and the upper surface are
connected with each other by welding.
[0033] FIG. 6 is a schematic cross-sectional view along the line
6-6 of FIG. 5.
[0034] FIG. 7 is a schematic cross-sectional view along the line
7-7 of FIG. 6.
[0035] FIG. 8 is a schematic frontal cross-sectional view of the
hollow rectangular steel column which is apart of the joint
structure of iron framework shown in FIG. 1.
[0036] FIG. 9 is a schematic cross-sectional view of the
rectangular steel column (or the hollow rectangular steel beam) in
a state before a reinforcing material (knot material) is inserted
into the hollow rectangular steel (or the hollow rectangular steel
beam) shown in FIG. 4.
[0037] FIG. 10 is a schematic cross-sectional view along the line
10-10 of FIG. 9 where the reinforcing material (knot material)
shown in FIG. 9 is inserted into the rectangular steel column (or
the hollow rectangular steel beam) and is firmly attached by
welding.
[0038] FIG. 11 is a schematic partially enlarged cross-sectional
view showing a part of FIG. 10 in an enlarged state.
[0039] FIG. 12 is a schematic partially enlarged cross-sectional
view showing a part of FIG. 10 in an enlarged state FIG. 13 is a
diagram showing a state where a lateral coupling member is used in
the case where the lateral length of the hollow rectangular steel
beam shown in FIG. 1 is longer than its longitudinal length, where
FIG. 13A is a plan view, FIG. 13B is a frontal view, and FIG. 13C
is a bottom view.
[0040] FIG. 14 is a schematic exploded perspective view showing the
FIG. 13 in an exploded state.
[0041] FIG. 15 is a schematic perspective view of another
embodiment of FIG. 3, and showing a state where the coupling member
is firmly attached to the hollow rectangular steel column and the
hollow rectangular steel beam is before being connected.
[0042] FIG. 16 is a schematic perspective view showing a state
where the hollow rectangular steel beam is placed to the bottom
portion of the coupling member shown in FIG. 15 and before and
after the lid is placed to cover the upper surface of the hollow
rectangular steel beam.
[0043] FIG. 17A is a schematic cross-sectional view along the line
17-17 of FIG. 16, and FIG. 17B is a schematic partially enlarged
cross-sectional view.
[0044] FIG. 18 is a schematic frontal view according to another
embodiment of FIG. 3, and showing a state where the coupling member
is firmly attached to the hollow rectangular steel column and
before the hollow rectangular steel beam is connected.
[0045] FIG. 19 is a schematic frontal view according to another
embodiment of FIG. 18, and showing a state where the coupling
member is firmly attached to the hollow rectangular column and
before the hollow rectangular steel beam is connected.
[0046] FIG. 20 is a schematic perspective view showing a state
where a hollow rectangular steel beam is placed to the bottom
portion of the coupling member shown in FIG. 19 and before the lid
is placed to cover the upper surface of the hollow rectangular
steel beam.
BEST MODES FOR CARRING OUT THE INVENTION
[0047] A joint structure of iron framework and a coupling member
for connecting a rectangular steel beam to a rectangular steel
column according to an embodiment of the present invention will be
described with reference to drawings.
[0048] A reference numeral 1 shown in FIG. 1 denotes an iron
framework structure constituted by connecting a hollow rectangular
beam 4 to a hollow rectangular steel column 2 via a coupling member
3.
[0049] An outer shape of a cross-section crossing over a
longitudinal direction of the hollow rectangular steel column 2 and
an outer shape of a cross-section crossing over a longitudinal
direction of the hollow rectangular steel beam 4 respectively
assume a rectangular shape.
[0050] The coupling member 3 is used for connecting the hollow
rectangular steel beam 4 to the hollow rectangular steel column 2.
As shown in FIGS. 2 to 8, the coupling member 3 schematically
includes: a rectangular cylinder (substantially rectangular sleeve)
31; U-shaped receiving members 32 each formed on a side surface of
the rectangular cylinder (substantially rectangular sleeve); and
lids 33 for covering an opening 32a of each U-shaped receiving
member 32 and fixedly attached to each receiving member 32 so as to
cover the upper surface of the hollow rectangular steel beam 4
mounted in the U-shaped receiving member 32.
[0051] The rectangular cylinder (substantially rectangular sleeve)
31 assumes the shape of rectangular cylinder, and is fitted to the
outer periphery of the hollow rectangular steel column 2 and is,
firmly attached to the hollow rectangular steel column 2 by
welding. The site of the rectangular cylinder 31 fixedly attached
by welding has a site (denoted by reference numeral A in FIG. 3)
extending around the entire circumference of the upper edge portion
of the rectangular cylinder (substantially rectangular sleeve) 31
and fixedly attached by welding to the outer periphery of the
hollow rectangular steel column 2; and a site (denoted by reference
numeral B in FIG. 3) extending around the entire circumference of
the lower edge portion of the rectangular cylinder (substantially
rectangular sleeve) 31 and fixedly attached by welding to the outer
periphery of the hollow rectangular column 2.
[0052] As shown in FIG. 2, each U-shaped receiving member 32
provided on the side surface of the rectangular cylinder
(substantially rectangular sleeve) 31 substantially includes: a
U-shaped bottom portion 32b; a right rising portion 32c which is
one of the sides rising from the bottom portion 32b; and a left
rising portion 32d which is the other side rising from the bottom
portion 32b.
[0053] Further, the U-shaped bottom portion 32b is formed with a
bottom bolt hole H1 for allowing a bolt to pass therethrough; the
right rising portion 32c is formed with a right bolt hole H2 for
allowing a bolt to pass therethrough; and the left rising portion
32d is formed with a left bolt hole H3 for allowing a bolt to pass
therethrough, respectively.
[0054] As shown in FIG. 2, each U-shaped receiving member 32 is
structured as follows. That is, the U-shaped bottom portion 32b
extends from the side surface of the rectangular cylinder 31 and
the U-shaped opening 32a is directed upward. In addition, the
U-shaped end surface of the U-shaped receiving member 32 is fixedly
attached to the side surface of the rectangular cylinder and is
connected to the hollow rectangular steel beam 4. The reference
numeral C shown in FIG. 3 denotes a site of the U-shaped receiving
member 32 which is firmly attached by welding to the side surface
of the rectangular cylinder 31 along the U-shaped outer periphery
of the U-shaped end surface of the U-shaped receiving member 32,
that is, not only the side surfaces but also the bottom surface.
The U-shaped receiving member 32 shown in FIG. 3 is respectively
mounted to the four surfaces of the rectangular cylinder 31, and
thus, the U-shaped end surface of the U-shaped receiving member 32
is firmly attached by welding to each of the side surfaces of the
rectangular cylinder 31.
[0055] In addition to the welded sites A and B described above, as
shown in FIG. 2, the rectangular cylinder 31 is formed with slits
at its side surface. The rectangular cylinder 31 is firmly attached
by, for example, welding to the hollow rectangular steel column 2
via these slits S. Meantime, the length, width, and the like of
each slit S is properly set in consideration of the strength.
[0056] Each slit S of the coupling member 3 shown in FIG. 2 is
formed on all of the side surfaces of the rectangular cylinder 31,
that is, four surfaces. As shown in FIG. 6, one surface is formed
with three slits DDD, and another surface is formed with two slits
EE, and still another surface is formed with two slits FF, and
still another surface is formed with one slit G. The reference
numerals D, E, F, and G shown in FIG. 6 respectively show a site
where the rectangular steel column 2 and the rectangular cylinder
31 are firmly attached by welding to each other via the slit S.
[0057] As described above, the coupling member 3 is used for
connecting the hollow rectangular steel beam 4 to the hollow
rectangular steel column 2 to which the U-shaped receiving members
32 are firmly attached to the side surfaces of the rectangular
cylinder 31. As shown in FIGS. 2 and 3, thus-structured coupling
member 3 is fitted to the outer periphery of the hollow rectangular
steel column 2 and is firmly attached thereto by welding. As
described above, in this embodiment, the coupling member 3 is
firmly attached to the rectangular cylinder 31 strongly through the
welded site A firmly attached to the hollow rectangular steel
column 2 over the entire peripheral portion of the rectangular
cylinder 31 and the welded site B firmly attached to the hollow
rectangular steel column 2 over the entire peripheral portion of
the lower edge of the rectangular cylinder 31, in addition to the
welded sites D, E, F, G of the slits S.
[0058] After the coupling member 3 is firmly attached to the
rectangular cylinder 31, the hollow rectangular steel beam 4 is
moved in the direction along the arrow shown in FIG. 3 (or the
hollow rectangular steel beam 4 is moved from upward to downward),
so that the hollow rectangular steel beam 4 is brought into contact
with the bottom portion 32b of the U-shaped receiving member 32
(see FIG. 4).
[0059] The reference numeral 41 in FIGS. 3 and 4 denotes a hand
insertion hole formed on the upper surface of the hollow
rectangular steel beam 4 for allowing a hand to enter therein. The
bottom surface of the hollow rectangular steel beam 4 is formed
with a bottom surface bolt hole 42d corresponding to the bottom
bolt hole H1 (see FIG. 7); the right surface of the hollow
rectangular steel beam 4 is formed with a right surface bolt hole
42f corresponding to the right bolt hole H2 (see FIGS. 6 and 7);
and the left surface of the hollow rectangular steel beam 4 is
formed with a left surface bolt hole 42g corresponding to the left
bolt hole H3 (see FIGS. 6 and 7), respectively.
[0060] Therefore, as shown in FIG. 7, the U-shaped receiving member
32 and the hollow rectangular steel beam 4 are adopted to be
connected to each other by the bottom bolt TB and the bottom nut TN
via the bottom bolt hole H1 and the bottom surface bolt hole 42d,
by the right bolt RB and the right nut RN via the right bolt hole
H2 and the right side surface bolt hole 42f, and by the left bolt
LB and the left nut LN.
[0061] As described above, since the upper surface of the hollow
rectangular steel beam 4 is formed with a hand insertion hole 41 of
a size allowing a hand holding a bolt (or a nut) to enter therein,
the U-shaped receiving member 32 and the hollow rectangular steel
beam 4 can be easily connected to each other by the bottom bolt TB
and the bottom nut TN via the bottom bolt hole H1 and the bottom
surface bolt hole 42d, by the right bolt RB and the right nut RN
via the right bolt hole H2 and the right side surface bolt hole
42f, and by the left bolt LB and the left nut LN via the left bolt
hole H3 and the left side surface bolt hole 42g. As a result, the
workability can be enhanced.
[0062] Further, as shown in FIGS. 4 and 5, each lid 33 covering the
upper surface of the hollow rectangular steel beam 4 is formed with
slits. The lid 33 is firmly attached to the hollow rectangular
steel beam 4 via the slits ST by, for example, welding. The length,
width, and the like of each slit ST are properly determined in
consideration of strength. In this embodiment, four slits, two
slits, four slits, and six slits are formed in the respective lids
33. The site where the lid 33 is in contact with the hollow
rectangular steel column 2, the site where the lid 33 is in contact
with the upper end surface of the left rising portion 32c, and the
site where the lid 33 is in contact with the left rising portion
32d are also firmly attached by welding.
[0063] Specifically, each lid 33 is in the shape of rectangle when
viewed along its plane, and one side of the rectangle facing to the
rectangular cylinder 31 is firmly attached to the rectangular
cylinder 31 by welding (the welded site is denoted by the reference
numeral X1 in FIG. 5). Another side of the rectangle facing to the
right rising portion 32c which is one of the sides rising from the
bottom portion 32b of the U-shaped receiving member 32 is firmly
attached to the right rising portion 32c by welding (the welded
site is denoted by the reference numeral X2 in FIG. 5). Still
another side of the rectangle facing to the left rising portion 32d
which is the other side rising from the bottom portion 32b of the
U-shaped receiving member 32 is firmly attached to the left rising
portion 32d by welding (the welded site is denoted by the reference
numeral X3 in FIG. 5). The remaining one side of the rectangle
facing to the upper surface of the hollow rectangular steel beam is
firmly attached to the upper surface of the hollow rectangular
steel beam 4 (the welded site is denoted by the reference numeral
Z4 in FIG. 5). Further, each lid 33 is firmly attached to the upper
surface of the hollow rectangular steel beam 2 (the welded site is
denoted by the reference numeral X5 in FIG. 5).
[0064] Further, as shown in FIGS. 3 and 8 to 12, a reinforcing
materials (knot materials) 20 are inserted into the hollow
rectangular steel column 2 (the length of the rectangular steel
column is 25 m for example) via an inserting hole 2a at specified
intervals (for example, 1 m) so as to traverse the longitudinal
direction of the hollow rectangular steel column 2 in order to
increase resistance. The reinforcing materials are firmly attached
to the hollow rectangular steel column 2 via the inserting hole 2
and other inserting holes 2b, 2c, and 2d. Each site firmly attached
by welding is denoted by the reference numeral Y.
[0065] As shown in FIGS. 9 to 12, at the time of welding, the
welding can be performed without using a backing ring. Into the
hollow rectangular steel column 2, an unillustrated concrete
material (grout material) may be injected. A space between the
adjacent reinforcing materials (knot materials) 20 is filled with
an unillstrated concrete material (grout material) via a hole 20a
formed at the center of each reinforcing material (knot material)
20.
[0066] Specifically, the injection of the concrete (grout material)
and the like into the hollow rectangular steel column 2 is
effective in preventing in-plane buckling from occurring in the
hollow rectangular steel column 2 due to the binding force that
each reinforcing material (knot material) 20 has. In particular,
the resistances to bending moment, shearing force, and axial force
applied to the hollow rectangular steel column 2 at the time of
earthquake and the like are significantly increased. In addition,
the hollow rectangular steel column 2 gains significantly increased
resistance to buckling force generated by a vertical loading
applied to the hollow rectangular steel column 2. In addition,
since the concrete (grout material) and the like are present inside
the hollow rectangular steel column 2, the concrete (grout
material) and the like are not in contact with the air and thus are
free from oxidation. Therefore, the concrete (grout material) and
the like maintains its original alkaline nature over a long period
of time. Further, the synthesized rigidities of the rectangular
steel column 2, the coupling member 3, and the concrete (grout
material) and the like significantly increase the stress
transmission by the rectangular steel beam 4 at the joint
portion.
[0067] If the resistance does not become short, the reinforcing
material (knot material) 20 and an unillustrated concrete material
(grout material) and the like inside the hollow rectangular steel
column 2 may be omitted properly.
[0068] Contrarily, if the resistance of the hollow rectangular
steel beam 4 becomes short, a reinforcing material (knot material)
20, an unillustrated concrete (grout material), and the like [an
unillustrated concrete (grout material) and the like is not
necessarily provided to fill the entire space between the adjacent
reinforcing materials (knot materials) 20, but may be provided
partially between the space therebetween] may be properly provided
inside the hollow rectangular steel beam 4 as is the case of the
hollow rectangular steel column 2 [the symbol ( ) in FIGS. 9R and 9
to 12 shows a case where the hollow rectangular steel column 2 is
substituted by the hollow rectangular steel beam 4].
[0069] Further, if the lateral length of the hollow rectangular
steel beam 4 is longer than its longitudinal length, the lateral
coupling member 5 is used for connection (see FIGS. 13 and 14).
[0070] Specifically, the horizontal coupling member 5 is in the
shape of rectangular cylinder. The upper surface of the lateral
coupling member 5 is formed with hand insertion holes 51, 52 of the
sizes allowing a hand to enter therein. The front surface of the
lateral coupling member 5 is formed with a front bolt hole 54. The
back surface of the coupling member 5 is formed with a back surface
bolt hole 55. The bottom surface of the lateral coupling member 5
is formed with a bottom surface bolt hole 56.
[0071] One upper surface of the hollow rectangular steel beam 4 is
formed with a beam's hand insertion hole 44 corresponding to the
hand insertion hole 52. The front surface of the hollow rectangular
steel beam 4 is formed with a beam's front bolt hole 45. The back
surface of the hollow rectangular steel beam 4 is formed with a
beam's bolt hole 46. The bottom surface of the hollow rectangular
steel beam 4 is formed with a beam's bottom surface bolt hole
47.
[0072] The other upper surface of the hollow rectangular steel beam
4 is formed with a beam's hand insertion hole 42 corresponding to a
hand insertion hole 51. The front surface of the hollow rectangular
steel beam 4 is formed with a beam's front bolt hole 43. The back
surface of the hollow rectangular steel beam 4 is formed with a
beam's bolt hole (not shown). The bottom surface of the hollow
rectangular steel beam 4 is formed with a beam's bottom surface
bolt hole (not shown).
[0073] One side of the hollow rectangular steel beam 4 and the
other side of the hollow rectangular steel beam 4 are put into the
lateral coupling member 5 in such a manner that the beam's hand
insertion hole 44 corresponds to the hand insertion hole 52; the
beam's front bolt hole 45 corresponds to the front bolt hole 54;
the beam's bolt hole 46 corresponds to the back surface bolt hole
55; the beam's bottom surface bolt hole 47 corresponds to the
bottom surface bolt hole 56; the beam's hand insertion hole 42
corresponds to the hand insertion hole 51; the beam's front bolt
hole 43 corresponds to the front bolt hole 54; the beam's bolt hole
(not shown) formed on the back surface at the other side of the
hollow rectangular steel beam 4 corresponds to the back surface
bolt hole 55; and the beam's bottom surface bolt hole (not shown)
formed on the bottom surface of the other hollow rectangular steel
beam 4 corresponds to the bottom surface bolt hole 56. Then, bolts
(not shown) are engaged with nuts N1, N2, N3 corresponding to the
bolts, and one side of the hollow rectangular steel beam 4 and the
other side of the hollow rectangular steel beam 4 are connected to
each other via the lateral coupling member 5. After that, the
connection between one side of the hollow rectangular steel beam 4
and the other side of the hollow rectangular steel beam 4 is made
to be strong via the lateral coupling member 5 by welding via a
slit 53 and plates F1, F2.
[0074] The plate F1 is of a size that can be accommodated in the
hand insertion hole 52. The space between the plate F1 and the hand
insertion hole 52 is filled by welding so that the plate F1 and the
hand insertion hole 52 are connected with each other. The reference
numeral Y1 denotes a site connected by welding. The plate F2 is of
a size that can be accommodated in the hand insertion hole 51. The
space between the plate F2 and the hand insertion hole 52 is filled
by welding so that the plate F2 and the hand insertion hole 51 are
connected with each other. The reference numeral Y2 denotes a site
connected by welding. The reference numeral Y3 denotes a site
connected by welding where the lateral member 5 is connected to the
hollow rectangular steel beam 4 via the slit 53.
[0075] In FIGS. 13 and 14, when the lateral length of the hollow
rectangular steel beam 4 is longer than its longitudinal length,
the connection is made using the lateral coupling member 5 in the
shape of rectangular cylinder. However, the present invention is
not limited thereto. Although not illustrated, as is the case of
the U-shaped receiving member 32 and the lid 33 firmly attached to
the U-shaped receiving member 32 described above, the surface
having the hole insertion holes 51, 52 and the slit 53 of the
lateral coupling member 5 is separated, that is, the surface having
the hole insertion holes 51, 52, and the slit 53 is independent
from the U-shaped receiving member. Then, the U-shaped receiving
member and the surface having the hand insertion holes 51, 52, and
the slit 53 may be connected with each other by welding.
[0076] When the height dimension H of the hollow rectangular steel
beam 4 is large as shown in FIG. 15, the hand insertion hole 41
formed on the upper surface of the hollow rectangular steel beam 4
shown in FIG. 4 cannot handle with such a beam having large height
(in FIGS. 15 to 17, the same portions as described above are
denoted by the same reference numerals and the descriptions thereof
are partially omitted).
[0077] Specifically, as shown in FIGS. 15 to 17, the left side
surface of the hollow rectangular steel beam 4 is formed with a
hand insertion hole of rectangular beam's left side surface 4a of a
size that allows a hand to enter therein, and the right side
surface of the hollow rectangular beam 4 is formed with a hand
insertion hole 4b of rectangular beam's right side surface of a
size that allows a hand to enter therein (see FIG. 17),
respectively.
[0078] A surface of the left rising portion 32d is formed with a
hand insertion hole 32d' of rising portion's left side surface that
corresponds to the hand insertion hole 4a of rectangular beam's
left side surface. A surface of the right rising portion 32c is
formed with a hand insertion hole 32c' of rising portion's right
side surface that corresponds to the hand insertion hole 4b of
rectangular beam's right side surface. As is the case of the
embodiment shown in FIG. 7, as is shown in FIG. 17A, the U-shaped
receiving member 32 and the hollow rectangular steel beam 4 are
connected to each other by the bottom bolt TB and the bottom nut TN
via the bottom bolt hole H1 and the bottom surface bolt hole 42d,
by the right bolt RB and the right-side nut RN via the right bolt
hole H1 and the bottom surface bolt hole 42d, and by the left bolt
LB and the left nut LN via the left hole H3 and the left side
surface bolt hole 42g.
[0079] Further, the upper surface of the hollow rectangular steel
beam 4 is covered with the lid 33 shown in FIG. 16. The lid 33 is
firmly attached by welding to the hollow rectangular steel beam 4
via the slits ST.
[0080] The hand insertion hole 4a of rectangular beam's left side
surface is closed via a plate F2' located inside the hand insertion
hole of rising portion's left side surface 32d'. At the same time,
the left rising portion 32d is connected to the hollow rectangular
steel beam 4 by welding via the plate F2' (see FIG. 17B).
Similarly, the hand insertion hole 4b of rectangular beam's right
side surface is closed via a plate F1' located inside the hand
insertion right rising portion right side surface hole 32c'. At the
same time, the right rising portion 32c is connected to the hollow
rectangular steel beam 4 by welding via the plate F1'.
[0081] In some cases, it is enough to provide either one of the
hand insertion hole 4a of rectangular beam's left side surface and
the hand insertion hole 4b of rectangular beam's right side
surface. In such cases, the number of the hand insertion hole (4a
or 4b) of rectangular beam's side surface is one. The site on the
surface of the right rising portion 32c or on the surface of the
left rising portion 32d that corresponds to the hand insertion hole
of rectangular beam's side surface (4a or 4b) will be a hand
insertion hole of rising portion's side surface (32c' or 32d').
[0082] Therefore, according to the joint structure of iron
framework 1 described above, the rectangular cylinder 31 of the
joint member 3 is fitted to the outer periphery of the hollow
rectangular steel column and is firmly attached to the hollow
rectangular steel column 2 without cutting some midpoint of the
hollow rectangular steel column as in prior arts. As a result, the
workability is enhanced. In addition, since the beam is a hollow
rectangular steel beam 4 unlike a conventional beam having a
H-shaped cross section, the strength against the lateral loading is
increased.
[0083] The shape of the U-shaped receiving member 32 is not limited
to that shown in FIG. 3. Alternatively, for example, as shown in
FIG. 18, the U-shaped receiving member 32 may include: a U-shaped
bottom portion 32b; a right rising portion 32c which is one of the
sides rising from the bottom portion 32b at an angle of 90 degree
with respect to the bottom portion 32b; and a left rising portion
32d which is the other side rising from the bottom portion 32b at
an angel exceeding 90 degree [90 degree+.theta.] with respect to
the bottom portion 32b. In FIG. 18, the reference numeral C'
denotes the welded site where the rectangular cylinder 31 and the
U-shaped receiving member 32 are connected to each other by
welding. The hollow rectangular steel beam 4 is lifted down to be
in contact with the U-shaped receiving member 32.
[0084] The U-shaped receiving member 32 is not limited to that
shown in FIG. 18. Alternatively, for example, as shown in FIGS. 19
and 20, the U-shaped receiving member 32 may include: an L-shaped
receiving member 32' which has only one of the right rising portion
32c and the left rising portion 32d which rise from the bottom
portion 32b (in this embodiment, there is no left rising portion
32d); and a flat plane-shaped member 32'd welded to the bottom
portion 32b of the L-shaped receiving member 32' (the welded site
is denoted by the reference numeral G in FIG. 20) at a site where
there is no rising portion (in this embodiment, a left rising
portion 32d). In FIG. 19, the hollow rectangular steel beam 4 is
lifted down to be in contact with the U-shaped receiving member 32.
The reference numeral H.sub.1.sup.5 denotes a bottom bolt hole,
H.sub.2.sup.5 a right bolt hole, and H.sub.3.sup.5 a left bolt
hole.
* * * * *