U.S. patent application number 12/455069 was filed with the patent office on 2010-08-26 for variable bend for use with gun and gun attached with the same.
This patent application is currently assigned to EXMODEL Company Limited. Invention is credited to Katsuyuki Koyama.
Application Number | 20100212204 12/455069 |
Document ID | / |
Family ID | 42629648 |
Filed Date | 2010-08-26 |
United States Patent
Application |
20100212204 |
Kind Code |
A1 |
Koyama; Katsuyuki |
August 26, 2010 |
Variable bend for use with gun and gun attached with the same
Abstract
The invention provides a variable bend that allows a cheek rest
to be accurately adjusted and to be firmly fixed to a gunstock
without impairing the gunstock. A pad base is fixed between a
rear-end face of the stock and a shoulder pad. A bend frame is
fixed to the stock by plastically deforming a joint portion in
conformity with a shape of an upper part of the stock, by adhering
the joint portion with the upper part of the stock and by fixing an
attachment plate to a coupling portion of the pad base. Then, the
cheek piece is vertically adjustably fixed to the bend frame.
Inventors: |
Koyama; Katsuyuki; (Ota-ku,
JP) |
Correspondence
Address: |
JORDAN AND HAMBURG LLP
122 EAST 42ND STREET, SUITE 4000
NEW YORK
NY
10168
US
|
Assignee: |
EXMODEL Company Limited
Ota-ku
JP
|
Family ID: |
42629648 |
Appl. No.: |
12/455069 |
Filed: |
May 28, 2009 |
Current U.S.
Class: |
42/73 |
Current CPC
Class: |
F41G 1/425 20130101;
F41A 21/24 20130101; F41C 23/14 20130101; F41C 23/08 20130101 |
Class at
Publication: |
42/73 |
International
Class: |
F41C 23/14 20060101
F41C023/14 |
Foreign Application Data
Date |
Code |
Application Number |
Feb 20, 2009 |
JP |
2009-038314 |
Claims
1. A variable bend for use with a gun having a barrel and a stock,
the bend being for attachment to the stock, comprising: a pad base
composed of an interposed portion interposed between a rear-end
face of the stock and a shoulder pad and a coupling portion formed
at an upper end of the interposed portion and having a coupling
slit; a bend frame having a joint portion that may be joined to an
upper part of the stock and an attachment plate formed so as to
rise at a center part of the joint portion in a width direction and
having a plurality of elongate holes; and a cheek piece having a
slit that fits with the attachment plate; wherein the interposed
portion of the pad base is fixed between the rear-end face of the
stock and the shoulder pad, the bend frame is attached to the stock
by fitting and fixing the attachment plate into the coupling slit
of the coupling portion of the pad base and by fixing the joint
portion to the upper part of the stock, and the cheek piece is
fixed to the bend frame by fitting the attachment frame of the bend
frame into the slit of the cheek piece while adjusting its height
by the elongate holes and screws.
2. The variable bend for use with the gun according to claim 1,
wherein the joint portion of the bend frame has a number of cuts
formed so as to extend from the outside to the attachment plate in
a width direction and has a number of split pieces arrayed in a
longitudinal direction; and each of these split pieces is made to
be plastically deformable in conformity with a contour of the upper
part of the stock.
3. The variable bend for use with the gun according to claim 1,
wherein a vertically elongate hole having a recess is formed
through the interposed portion of the pad base and a sliding nut is
fitted slidably into the elongate hole having the recess; the
coupling portion of the pad base is fixed with the attachment plate
of the bend frame vertically adjustably by the elongate holes and
screws; and the interposed portion of the pad base is fixed to the
rear-end face of the stock and the sliding nut is screwed into the
interposed portion so as to be able to adjust the shoulder pad in a
vertical direction.
4. The variable bend for use with the gun according to claims 1
through 3, wherein the attachment plate of the bend frame has a
concave portion formed so as to allow a string, a band or the like
to be would around together with the stock at an end thereof
opposite from the coupling portion of the pad base.
5. The variable bend for use with the gun according to claim 1,
wherein the joint portion of the bend frame has a number of cuts
formed so as to extend from the outside to the attachment plate in
a width direction and has a number of split pieces arrayed in a
longitudinal direction, each of these split pieces being made to be
plastically deformable in conformity with the contour of the upper
part of the stock; the vertically elongate hole having a recess is
formed through the interposed portion of the pad base and a sliding
nut is fitted slidably into the elongate hole having the recess;
the coupling portion of the pad base is fixed with the attachment
plate of the bend frame vertically adjustably by the elongate holes
and screws; the interposed portion of the pad base is fixed to the
rear-end face of the stock and the sliding nut is screwed into the
interposed portion so as to be able to adjust the shoulder pad in a
vertical direction; and the attachment plate of the bend frame has
a concave portion formed so as to allow a string, a band or the
like to be would around together with the stock at an end thereof
opposite from the coupling portion of the pad base.
6. A gun having the stock attached with the variable bend described
in claim 1 and the barrel attached with a removable high rib that
extends along the barrel at a predetermined height.
7. A gun having the stock attached with the variable bend described
in claim 2 and the barrel attached with a removable high rib that
extends along the barrel at a predetermined height.
8. A gun having the stock attached with the variable bend described
in claim 3 and the barrel attached with a removable high rib that
extends along the barrel at a predetermined height.
9. A gun having the stock attached with the variable bend described
in claim 4 and the barrel attached with a removable high rib that
extends along the barrel at a predetermined height.
10. A gun having the stock attached with the variable bend
described in claim 5 and the barrel attached with a removable high
rib that extends along the barrel at a predetermined height.
11. The gun according to claim 6, wherein the high rib comprises a
plurality of mount sections fixed to the barrel by sandwiching a
rib formed along the barrel; and a top rib section fixed to the
upper part of the mount sections vertically adjustably by elongate
holes and screws; wherein the plurality of mount sections is made
of a plastic material split in a width direction and the top rib
section is made of an aluminum material so as to have a cross
section in a shape of T; and the respective split mount sections
are fixed to the barrel while sandwiching the rib of the barrel and
the frame formed under the top rib.
12. The gun according to claim 11, wherein a front edge mount
section among the plurality of mount sections is provided with a
seat member that is fixed so as to project out of the front edge
mount section and that may be grounded in placing down the gun on
the ground.
13. The gun according to anyone of claim 11, wherein an upper
surface of the top rib section is matte-finished.
Description
CROSS REFERENCE TO RELATED APPLICATIONS
[0001] This application claims the foreign priority benefit under
Title 35, United States Code, .sctn.119 (a)-(d) of Japanese Patent
Application No. 2009-038314, filed on Feb. 20, 2009 in the Japan
Patent Office, the disclosure of which is herein incorporated by
reference in its entirety.
BACKGROUND OF THE INVENTION
[0002] 1. Field of the Invention
[0003] The present invention relates to a gun for use in shooting
matches and hunting and more specifically to a variable bend
attached to a gunstock so as to fit in resting one's cheek, a
variable bend suitably applied to a gun attached with a high rib
and to a gun attached with the variable bend.
[0004] 2. Description of Related Art
[0005] Fighting in shooting in cases of using sporting guns (trap,
skeet, double-trap and others), hunting guns and shotguns in
particular is set in a moment, so that it is important how a
marksman can rest his cheek and shoulder against the gun when the
marksman takes a shooting position in order to be able to naturally
adjust on a shooting line. Although each marksman has a different
physical frame, a different face, a different habit and a different
preference in taking a shooting position, a gunstock of an ordinary
ready-made gun is made in a so-called standardized size that is a
greatest common denominator of users.
[0006] By the way, a gun sight has been widened lately and a high
rib has come to be used as what functions advantageously for
sporting guns such as a gun for clay shooting in particular. Among
the high ribs, there is even proposed a high rib that is attached
afterward to a normal rib.
[0007] Conventionally, there is proposed a gunstock in which an
upper part of the gunstock is cut and a cheek piece or a cheek
piece integrated with a shoulder pad is vertically movably and
fixably attached to the cut part as disclosed in Japanese Patent
Application Laid-open Nos. H05-215498 and H08-121994 and U.S. Pat.
No. 5,392,553 for example. Still more, there is proposed a gunstock
in which a recess is formed in a rear-end thereof, a slider having
a shoulder pad is engaged vertically movably with a slider receiver
and a stock-end plate including the shoulder pad the slider is
attached to the stock by screws as disclosed in Japanese Patent
Application Laid-open No. 2003-322497 for example.
[0008] However, those guns described above require to cut the upper
part and/or rear-end face part of the stock and to work upon the
cut parts in order to attach the cheek piece (cheek rest), the
cheek piece and the shoulder pad or the shoulder pad to the stock.
That is, the gun is customized for a specific marksman or game and
the gun cannot be returned to its original shape once it is worked
upon. Therefore, such a gun is used exclusively for the individual
(user) and a commercial value of the gun drops. Still more, such a
gun spreads only among a few numbers of players due to an emotional
hesitation that the precious gun might be impaired.
[0009] Still more, although it is necessary to heighten a
cheek-rest part (high bend) when the aforementioned removable high
rib is attached to the barrel in order to match with the heightened
rib, the high rib may not be able to match with the customized
stock that cannot be returned to its original shape as long as the
high rib is removable. That is, even if an attachment high rib
having an equal performance with a lightweight gun whose barrel
itself is made as a high rib is developed, this mismatch would
restrain its spread.
[0010] Further, although there is one for adjusting the bend by
winding a ringed stock guard made of an elastic material around the
stock and by inserting an intermediary material made of sponge into
a part between the stock guard and the upper part of the stock, it
is unable to provide a stable bend position and does not permit to
obtain an accurate point of impact.
[0011] Accordingly, in order to solve the aforementioned problems,
the present invention seeks to provide a variable bend as well as a
gun attached with the same that allows the cheek rest part (bend)
to be accurately adjusted and to be firmly fixed to the gunstock
without impairing the gunstock.
SUMMARY OF THE INVENTION
[0012] According to a first aspect of the invention, there is
provided a variable bend for used with a gun having a barrel and a
stock and attached to the stock. The variable bend includes a pad
base having an interposed portion interposed between a rear-end
face of the stock and a shoulder pad and a coupling portion formed
at an upper end of the interposed portion and having a coupling
slid;
[0013] a bend frame having a joint portion that may be joined to an
upper part of the stock and an attachment plate formed so as to
rise at a center part of the joint portion in a width direction and
having a plurality of elongate holes; and
[0014] a cheek piece having a slit that fits with the attachment
plate;
[0015] wherein the interposed portion of the pad base is fixed
between the rear-end face of the stock and the shoulder pad, the
bend frame is attached to the stock by fitting and fixing the
attachment plate into the coupling slit of the coupling portion of
the pad base and by fixing the joint portion to the upper part of
the stock, and the cheek piece is fixed to the bend frame by
fitting the attachment frame of the bend frame to the slit of the
cheek piece while adjusting its height by the elongate holes and
screws.
[0016] According to the first aspect of the invention described
above, the bend frame is firmly fixed to the stock by fixing the
rear end portion of the attachment plate to the coupling portion of
the pad base and by fixing the joint portion thereof to the upper
part of the stock and the cheek piece is fixed to the bend frame by
engaging its slit with the attachment plate of the bend frame while
adjusting its height by the elongate holes and screws, so that the
variable bend may be readily attached to the stock. Accordingly, it
becomes possible to set a cheek rest position fitting with the
marksman and the gun and to modify an ordinary gun as a gun having
the same performance with a custom-made gun or as a gun for
shooting match in particular readily at low cost.
[0017] Still more, because the pad base is fixed by being
interposed between the rear-end face of the stock and the shoulder
pad and the joint portion of the bend frame is fixed to the upper
part of the stock by means of adhesive or the like, the variable
bend may be attached to the stock without specifically working upon
the stock and may be removed, when it becomes unnecessary, to
return to the original gun.
[0018] According to a second aspect of the invention, the joint
portion of the bend frame has a number of cuts formed so as to
extend from the outside in a width direction toward the attachment
plate and has a number of split pieces split in a longitudinal
direction; and
[0019] each of these split pieces is made to be plastically
deformable in conformity with a shape of an upper part of the
stock.
[0020] According to the second aspect of the invention described
above, the joint portion of the bend frame is formed of the split
pieces, so that it may be readily plastically deformed in
conformity with the contour of the upper part of the stock by
hands. Therefore, the joint portion may be adhered in conformity
with the contour of the upper part of the stock and the bend frame
may be readily and firmly fixed to the stock by means of the
adhesive or the like.
[0021] According to a third aspect of the invention, a vertically
elongate hole having a recess is formed through the interposed
portion of the pad base so as to insert a slidable nut into the
elongate hole having the recess;
[0022] a coupling portion of the pad base is fixed with the
attachment plate of the bend frame vertically adjustably by the
elongate holes and screws; and
[0023] the interposed portion of the pad base is fixed to the
rear-end face of the stock and the sliding nut is screwed into the
interposed portion so as to be able to adjust the shoulder pad in a
vertical direction.
[0024] According to the third aspect of the invention described
above, the interposed portion of the pad base having the sliding
nuts is fixed to the rear-end face of the stock and the shoulder
pad may be vertically movably fixed to the stock by the sliding
nuts, so that the position of the shoulder pad may be readily
adjusted so as to fit with a body frame of the marksman, a type of
the gun, position of the variable bend and others. That is, the
marksman can improve the shooting performance by adjusting the
shoulder pad in conformity with position of his shoulder.
[0025] Still more, although the shoulder pad is fixed to the
rear-end face of the stock by two wood screws in general, positions
for screwing the screws vary depending makers, countries and
others. However, the sliding nut described above allows the
variable bend including the shoulder pad to be attached to the
stock without impairing the stock and without creating new holes
through the shoulder pad by using the existing holes of the stock
by matching with the original wood screw position of the shoulder
pad. The gun may be returned to its original shape just by removing
the variable bend.
[0026] According to a fourth aspect of the invention, the
attachment plate of the bend frame has a concave portion formed so
as to allow a string, a band or the like to be would around
together with the stock at an end thereof opposite from the
coupling portion of the pad base.
[0027] According to the fourth aspect of the invention described
above, the bend frame has the concave portion and the string, band
or the like may be wound around the concave portion and the stock,
so that the bend frame may be temporarily joined together with the
stock in adhering the joint portion. Or, the bend frame may be
fixed to the stock by solely winding the string around them or by
winding it around them in conjunction with the adhesion of the
joint portion.
[0028] According to a fifth aspect of the invention, there is
provided a gun having the stock attached with the variable bend
described above and the barrel attached with a removable high rib
that extends along the barrel at a predetermined height.
[0029] According to the fifth aspect of the invention, the variable
bend is removably attached to the stock of the gun in which the
removable high rib is attached to the barrel, so that the widened
sight caused by the high rib improves the shooting performance or
performance in clay shooting in particular. However, it is possible
to return the gun to the original ordinary gun without leaving any
scar to the gun just by removing the variable bend and the high
rib.
[0030] According to a sixth aspect of the invention, the high rib
includes a plurality of mount sections fixed to the barrel while
sandwiching a rib formed along the barrel; and
[0031] a top rib section fixed to the upper part of the mount
sections vertically adjustably by elongate holes and screws;
[0032] wherein the plurality of mount sections is formed of a
plastic material split in a width direction and the top rib section
is made of an aluminum material; and
[0033] the respective split mount sections are fixed to the barrel
while sandwiching the rib of the barrel and the frame formed under
the top rib.
[0034] According to the sixth aspect of the invention described
above, the high rib has the plurality of mount sections made of
plastic such as glass-reinforced polycarbonate for example and the
top rib section made of aluminum, so that the lightweight high rib
may be realized while keeping required strength. Thus, it can
remarkably reduce an inertial load during firing of the gun
attached with the high rib. Still more, the vertical position of
the top rib is adjustable, so that it becomes possible to adjust an
aim line and a point of impact readily and accurately while
adjusting the bend by the variable bend. Thus, the invention allows
the inexpensive attachments to be attached to the gun without
working upon the body of the gun and the same performance with an
expensive custom-made gun to be acquired.
[0035] Still more, because the respective mount sections are split
into two parts, they may be mounted by sandwiching the rib of the
barrel and can also readily sandwich the frame of the top rib
section. Due to the flexibility of the plastic, the high rib of the
invention can sandwich the rib of the barrel even if a width of the
rib is different.
[0036] According to a seventh aspect of the invention, a front edge
mount section among the plurality of mount sections has a seat
member that is fixed so as to project out of the front edge mount
section and that may be grounded in placing down the gun on the
ground.
[0037] According to the seventh aspect of the invention described
above, the seat member that is fixed so as to project out of the
front edge mount section may be grounded in placing down the gun on
the ground during a shooting standby time for example, so that it
is possible to prevent a gun muzzle part from being soiled or
damaged.
[0038] According to an eighth aspect of the invention, an upper
surface of the top rib section is matte-finished.
[0039] According to the eighth aspect of the invention described
above, the upper surface of the top rib section is matte-finished
by means of shot blast, sand blast and others, so that it prevents
reflection in aiming at a target and improves aiming
performance.
[0040] It is noted that the summary of the invention described
above does not necessarily describe all necessary features of the
invention. The invention may also be a sub-combination of the
features described above.
BRIEF DESCRIPTION OF DRAWINGS
[0041] FIG. 1 is a front view showing a gun in a state in which a
variable bend and a high rib of the invention are disassembled;
[0042] FIG. 2 is a front view of the gun to which the variable bend
and the high rib are attached;
[0043] FIGS. 3A and 3B are front and side views showing a pad base
of the variable bend;
[0044] FIGS. 4A, 4B and 4C are front, plan and side views
respectively showing a bend frame of the variable bend;
[0045] FIG. 5A is a section view taken along a line A-A in FIG. 5B
showing a cheek piece of the variable bend, FIGS. 5B and 5C are
bottom and side views of the cheek piece;
[0046] FIG. 6 is a front view showing the entire high rib;
[0047] FIGS. 7A, 7B and 7C are front, plan and side views
respectively showing a front mount section of the high rib;
[0048] FIGS. 8A, 8B and 8C are front, plan and side views
respectively showing a middle mount section of the high rib;
[0049] FIGS. 9A, 9B and 9C are front, plan and side views
respectively showing a rear mount section of the high rib;
[0050] FIGS. 10A, 10B and 10C are plan, front and enlarged side
views respectively showing a top rib section of the high rib;
and
[0051] FIGS. 11A, 11B, 11C and 11D are plan, front, left side and
right side views respectively showing a seat member.
BEST MODE FOR CARRYING OUT THE INVENTION
[0052] The invention will now be described based on a preferred
embodiment with reference to the drawings, which do not intend to
limit the scope of the invention, but exemplify the invention. All
of the features and the combinations thereof described in the
embodiment are not necessarily essential to the invention.
[0053] FIG. 1 shows a state in which a variable bend 2 and a high
rib 3 that may be removably attached to a ready-made gun 1 are
disassembled and FIG. 2 shows a gun 1' in a state in which the
variable bend 2 and the high rib 3 are attached therewith.
[0054] The ready-made gun (over-under) 1 has a barrel 5, a stock 6
and a machinery section not shown. FIG. 1 shows a state in which a
shoulder pad 7 is detached from a rear-end face 6a of the stock 6.
The variable bend 2 is composed of a pad base 9, a bend frame 10
and a cheek piece 11. The pad base 9 has an interposed portion 12
interposed and fixed between the rear-end face 6a of the stock 6
and the shoulder pad 7 and a coupling portion 13 formed in a body
with the interposed portion 12 at an upper end of the interposed
portion 12. The bend frame 10 has a joint portion 15 that may be
joined with an upper part 6b of the stock 6 and an attachment plate
16 formed in a body with the joint portion 15. The cheek piece 11
is vertically adjustably fixed to the attachment plate 16 as
described later.
[0055] The high rib 3 has a front mount section 17a, a rear mount
section 17b and three middle mount sections 17c as well as a top
rib section 19 fixed across upper ends of those mount sections. The
mount sections 17a, 17b and 17c are fixed respectively to a rib 5a
formed along the barrel 5. A sighting device 20 (see Japanese
Utility Model No. 3043520) devised by the same inventor and
applicant with the present invention is attached at an end of the
top rib section 19. The sighting device 20 is constructed so as to
help aiming at a moving target by looking through a colored
transparent member such as an acrylic material from a rear
cylindrical part. Noted that although it is preferable to attach
the sighting device 20 because aiming precision improves, it is not
always necessary to attach the device.
[0056] The pad base 9 is composed of the interposed portion 12
having substantially the same plane shape with the rear-end face 6a
of the stock 6 (see FIG. 3B) and the coupling portion 13 that
extends forward (see FIG. 3A) at the upper end part of the
interposed portion 12. The interposed portion 12 has two upper and
lower elongate holes 21 and recesses 22 formed around the front
side of these elongate holes. Sliding nuts 23 are inserted into the
respective recesses 22 and elongate holes 21. The sliding nut 23
has an oval collar 23a and a cylindrical internal thread part 23b.
That is, the sliding nut 23 is formed so that it fits into the
elongate hole 21 of the interposed portion 12 slidably in the
vertical direction by fitting the collar 23a into the recess 22 and
by fitting the internal thread part 23b into the elongate hole
21.
[0057] The coupling portion 13 is formed so that upper right and
left side faces are tapered as tapered faces 13a and a lower face
fits along the upper part of the stock as a curved surface 13b. The
coupling portion 13 also has a coupling slit 13d at a center part
in a width direction from an upper flat face 13c to the lower
curved surface 13b. Still more, the coupling portion 13 has a hole
that penetrates through right and left side faces 13e. One side of
the hole is a thread hole 13f.sub.1 and the other side is a stepped
hole 13f.sub.2 into which a head of a bolt having a hole for a
hexagonal rod spanner may be fitted.
[0058] The interposed portion 12 of the pad base 9 is fixed to the
rear-end face 6a by two-sided adhesive tapes and/or wood screws
while facing the recesses 22 against the stock 6 in a state in
which the sliding nuts 23 are fitted into the upper and lower
recessed elongate holes 21 having the recesses. Then, the shoulder
pad 7 is fixed to the interposed portion 12 thus fixed to the stock
6 on the side thereof opposite from the rear-end face 6a by
screwing bolts 25 into the sliding nuts 23. The sliding nuts 23 are
vertically adjustable along the upper and lower elongate holes 21
and recesses 22 at this time, so that the shoulder pad 7 may be
fixed to the stock 6 by moderately screwing the bolts 25 into the
sliding nuts 23 while adjusting their position corresponding to the
body frame, preference and habit of the marksman, to the height of
the cheek piece 11 (while adjusting the variable bend) and to
whether or not there is the high rib 3. Then, the bolts 25 are
fastened into the nuts 23.
[0059] The shoulder pad 7 is fixed to the rear-end face 6a of the
stock 6 by two upper and lower wood screws in general. Accordingly,
even if a distance between holes of the wood screws is different
depending on the European-type and American-type guns and depending
on makers, the pad base 9 permits to adjust the vertical position
of the shoulder pad 7 and to fix it to the stock 6 while using the
conventional shoulder pad 7 as it is even for any gun regardless of
the distance between the wood screws by inserting the bolts 25 into
the holes of the wood screws in the stock in the original state
(without working anything upon it) because the two upper and lower
sliding nuts 23 are movable.
[0060] FIGS. 4A, 4B and 4C show the bend frame 10. The bend frame
10 is made of aluminum and has the joint portion 15 that extends
while curving to right and left in the width direction and the
attachment plate 16 that rises at the center of the joint portion
15 in the width direction. The joint portion 15 has a large number
of cuts 26 extending from the center part of the joint portion 15
to the outside in the width direction and has a large number of
split pieces 15a arrayed in a longitudinal direction. Because these
split pieces 15a are formed of thin pieces of a metallic material
such as aluminum, they are readily plastically deformed by hands
along the curved contour of the upper part 6b of the stock 6. The
attachment plate 16 has a tapered face 16a formed at an upper face
of a rear part thereof, an elongate hole 27 that extends in the
vertical direction and two elongate holes 29 that extend in the
vertical direction and that are formed while keeping a
predetermined distance from each other. Still more, the attachment
plate 16 has a recess 30 at an upper surface of a front edge
portion thereof.
[0061] The bend frame 10 is fixed to the stock 6 by plastically
deforming the split pieces 15a of the joint portion 15 along the
curved surface of the upper part 6b of the stock 6 and by joining
the joint portion 15 to the upper part 6b by a two-sided adhesive
tape or the like. Note that it is possible to fix the bend frame 10
accurately and firmly at an adequate position of the stock 6 by
temporarily attaching to the stock during adhesion by winding and
fastening a string, a band, a rubber band or the like around the
recess 30 and the stock at this time. After completing the adhesion
of the joint portion, the winding member such as the band is
removed. It is also possible to use the front part of the bend
frame 10 by firmly fixing the part to the stock by winding and
fastening the band or the like around the recess 30 when they are
not adhered by means of the two-sided adhesion tape due to reasons
that the bend frame 10 is used temporarily or no trace of the
adhesive is wanted on the stock.
[0062] Meanwhile, the bend frame 10 is fixed to the pad base 9
fixed to the rear-end face of the stock by fitting a rear end
portion of the attachment plate 16 of the bend frame 10 into the
coupling slit 13d of the coupling portion 13 by screwing a bolt not
shown into the screw hole 13f.sub.1 and the stepped hole 13f.sub.2
through the rear elongate hole 27 of the attachment plate 16.
Accordingly, the bend frame 10 is fixed to the stock 6 by
plastically deforming the joint portion 15 in conformity with the
curved surface of the upper part 6b of the stock and by screwing
the bolt into the pad base 9 that is fixed to the stock. Although
there may be a slight misalignment between the elongate hole 27 of
the attachment plate 16 and the pad base 9 fixed to the rear-end
face of the stock depending on guns at this time, the rear elongate
hole 27 is formed to have a wide width to accommodate with the
misalignment. Still more, the joint portion 15 fits to the upper
part of the stock by the plastic deformation of the split pieces
15a, so that the bend frame 10 may be firmly fixed to an
appropriate position of the stock 6.
[0063] FIG. 5A is a section view taken along a line A-A in FIG. 5B
showing the cheek piece 11 of the variable bend, FIGS. 5B and 5C
are bottom and side views thereof. The cheek piece 11 is made of
plastic or wood and is formed so that its cross-section is
substantially semi-circular and both side faces of a front edge
thereof are tapered as tapered faces 11a. Still more, bottom center
parts of the cheek piece 11 are cut off as hollow portions 32, 33
and 35. The front edge is formed to be a solid portion 36 and a
rear edge face and two middle places are formed to be bridging
solid portions 37, 39 and 40 connecting the right and left side
faces 11c. The bridging solid portions have the slit 41 formed at
the center part thereof and the two middle bridging solid portions
39 and 40 have thread holes 39a and 40a and stepped holes 39b and
40b, respectively, formed for bolts having a hexagonal head.
[0064] The cheek piece 11 is fixed to the bend frame 10 by fitting
the slit 41 with the attachment plate 16 of the bend frame 10 and
by moderately screwing the bolts into the thread holes 39a and 40a
and the stepped holes 39b and 40b while penetrating through the
elongate holes 29 of the attachment plate 16. At this time, the
elongate holes 29 permit to adjust a height and an angle in the
longitudinal direction of the cheek piece 11. Then, the cheek piece
11 is fixed to the bend frame 10 by firmly fastening the bolts by
means of a hexagonal rod spanner. Thus, the cheek piece 11 having
an appropriate contour is firmly fixed to the bend frame 10 while
adjusting its cheek rest position and aim line. Therefore, even if
the marksman rests his cheek against the cheek piece 11 with a
quick action, the cheek piece 11 will not fall down or displaced,
so that it becomes possible to shoot quickly and accurately because
the accurate aim line and the appropriate close contact with the
shoulder pad 7 may be attained.
[0065] Next, the high rib 3 appropriately matched with the variable
bend 2 described above will be explained with reference to FIGS. 6
through 10.
[0066] As shown in FIG. 6, the high rib 3 is composed of mount
sections, i.e., the front mount section 17a, the rear mount section
17b and the three middle mount sections 17c, made of
glass-reinforced polycarbonate and the top rib section 19 made of
aluminum for example. Each mount section is composed two
mirror-symmetrical (half) pieces and the high rib 3 is fixed to the
barrel 5 by sandwiching the rib 5a (see FIG. 1) of the gun and a
frame 19b (see FIGS. 6 and 10C) of the top rib section 19 by mating
those (half) pieces.
[0067] FIGS. 7A, 7B and 7C are front, plan and side views
respectively showing the front mount section 17a of the high rib.
The front mount section 17a is composed of a lower coupling portion
42, an upper coupling portion 43, front and rear column portions 45
and 46 and a middle column portion 47 and has a shape in which
rectangular and triangular shapes are combined when seen from the
front side as shown in FIG. 7A. The lower coupling portion 42 is
formed into a shape of a hook to form a croze capable of
sandwiching a rim of the barrel by the right and left (half)
pieces. The lower coupling portion 42 and the upper coupling
portion 43 have seats 48 and holes 49 formed for bolts and nuts. It
is noted that FIGS. 7 through 9 show only one (half) piece of each
mount section and the other (half) piece is omitted here because
they are mirror-symmetrical from each other.
[0068] As shown in FIGS. 8A, 8B and 8C, each of the three middle
mount sections 17c has a triangular shape when seen from the front
as shown in FIG. 8A and has a hook-like lower coupling portion 50,
front and rear columnar sections 51 and 52 and seats 48 and holes
49 for bolts and nuts in the same manner with the front mount
section 17a described above.
[0069] The rear mount section 17b also has a triangular shape whose
hypotenuse is long when seen from the front side as shown in FIG.
9A and has a hook-like lower coupling portion 53, a rear columnar
sections 55 whose gradient is small and a vertical front columnar
section 56 and seats 48 and holes 49 for bolts and nuts in the same
manner with the front mount section 17a.
[0070] FIGS. 10A, 10B and 10C are plan, front and enlarged side
views respectively showing the top rib section 19 of the high rib
3. The top rib section 19 is formed into a shape of T as shown in
FIG. 10C. A matte finish treatment such as a shot blast finish and
a sand blast finish is applied to an upper surface U of the top rib
19a. A plurality of elongate holes 57 is formed through the frame
19b. The top rib section 19 is coupled with the respective mount
sections 17a, 17b and 17c through steps of interposing the frame
19b between the upper mount sections of the respective pieces,
mating the respective pieces, inserting the bolts into the
respective elongate holes 57 and fastening the nuts.
[0071] The high rib 3 is fixed to the barrel 5 by fastening the
bolts and nuts while sandwiching the rib of the barrel by the right
and left (half) pieces of the lower coupling portions 42, 50 and 53
of the respective mount sections. At this time, the elongate holes
57 permit to adjust a height and an angle in the longitudinal
direction of the high rib 3, so that it becomes possible to adjust
a supporting point and a point of impact. Still more, because the
respective mount sections 17a, 17b and 17c are made of plastic
having flexibility and the respective columnar portions can
sandwich the frame 19b of the top rib section 19 and the rib 5b of
the barrel with its elastic deformation, the high rib 3 may be
attached to most of guns even if a width of the rib of the barrel
is different.
[0072] The sighting device 20 devised by the inventor of the
present invention and described above may be attached to the front
edge of the top rib section 19 or a seat member 60 shown in FIG. 11
may be attached at the front edge of the front mount section 17a.
FIGS. 11A, 11B, 11C and 11D are plan, front, left side and right
side views respectively showing the seat member 11. The seat member
60 is made of plastic and has an oval grounding portion 61 at one
end, a retaining bulging portion 62 at another end and a thin
interposed portion 63 between them. The seat member 60 is attached
to the front mount section 17a by interposing the interposed
portion 63 of the seat member 60 between the both (half) pieces of
the front columnar portion 45 of the front mount section 17a and is
retained by the bulged portion 62 and the grounding portion 61. The
grounding portion 61 extends out of the barrel and supports the gun
when the barrel is placed down during a standby time for
example.
[0073] The gun 1' (see FIG. 2) having the same performance with a
custom-made gun to which a high rib and a high-bend are assembled
may be obtained by attaching the variable bend 2 and the high rib 3
to the gun 1. The high rib 3 is formed of the plurality of mount
sections made of plastic and the top rib section is made of
aluminum, so that its weight is light and does not change a balance
of the gun. Still more, each mount section has adequate elasticity,
so that it can absorb an impact shock and can reduce an inertial
load during firing. Further, the top rib section may be vertically
adjusted with respect to the respective mount sections, so that it
allows the supporting point and the point of impact to be finely
adjusted and allows improving the accuracy of shooting.
[0074] The variable bend 2 is positioned at the high-bend position
matching with the high rib 3 and permits to adjust the height and
aim line. Still more, the cheek piece 11 does not fall or is
displaced even if the marksman rests his cheek quickly and roughly
and always permits to assure an adequate cheek resting position
fitting with the marksman. Further, the variable bend 2 may be
attached to the body of the gun without impairing the gun and may
be removed, when it is not necessary, together with the removable
high rib 3 described above. That is, the gun 1 may be returned to
the original state as shown in FIG. 1.
[0075] Note that although it is preferable to use the variable bend
together with the high rib, it is not always necessary to use it
together with the high rib. For instance, the variable bend may be
used for a gun attached with a scope or a gun attached with various
optical sighting device. Still more, the variable bend may be used
solely for a normal gun.
[0076] Although the invention has been described by way of the
exemplary embodiments, it should be understood that those skilled
in the art might make many changes and substitutions without
departing from the spirit and scope of the invention. It is obvious
from the definition of the appended claims that the embodiments
with such modifications also belong to the scope of the
invention.
* * * * *