JP3179367U - Bonding bracket mounting structure - Google Patents

Abstract

An object of the present invention is to provide a mounting structure for a joint fitting that is more resistant to various stresses generated when an external force is applied.
A T-shaped bracket 10 is attached to the side surface of a column 18 when the beam and the column 18 are joined, and the end of the beam is abutted against the column 18 via the T-shaped bracket 10. It is a mounting structure. The embedded metal fitting 1 for holding the T-shaped metal fitting 10 is inserted into the column 18 from the outside to the inside. The embedded metal fitting 1 bites into the wood part firmly by the lag screw screw part 4. Threaded washers 5a and 5b are respectively screwed into the male screw portions 3 near the front and rear ends. The threaded washer 5b on the T-shaped metal fitting 10 side has a height that matches the depth of the recess 21 formed on the side surface of the column 18. Then, the T-shaped metal fitting 10 is fixed to the column 18 with the nut 26 so that the outer end face of the screw washer 5b and the front surface of the base plate 11 are in contact with each other.
[Selection] Figure 4

Description

  The present invention is the same as the construction of a structural material frame, in which the end of the second structural material is abutted against the side surface of the first structural material via a joint fitting, and both structural materials are joined via the joint fitting. The present invention relates to a structure for attaching a joint fitting to a first structural member.

  In the frame construction method, a joining metal fitting is often used when fixing a column and a column, a column and a beam, or a beam and a beam as a structural material. The design gazette of patent document 1 is mentioned as an example of such a joining metal fitting. For example, as shown in FIG. 1 showing the use state of the joint metal fitting (article name: architectural beam fixing metal fitting) of this Patent Document 1, as shown in FIG. 1, for example, a single pull bolt, a washer and a nut (or double pull) It is fixed to the beam with bolts.

Similar Design Registration No. 1 of Design Registration No. 899148

In such a configuration, various external forces act on the building joints due to, for example, wind or earthquakes in the building.
For example, when a horizontal force is applied to the horizontal member such as the beam, a large pulling force may be applied to the washer through the joint fitting. For this reason, conventionally, the area of the washer is made relatively large to reduce the load resistance per unit area, thereby preventing problems such as deformation of the washer and penetration of the washer into the wood part. However, there has been a demand for a metal fitting for fixing a bolt-shaped member that can reduce the load applied to the washer without increasing the area of the washer so much and can oppose the tensile stress.
Similarly, there is a possibility that a force that presses the column, that is, a compressive force, acts as a lateral force of the horizontal member. Conventionally, the compressive force has not been transmitted to the pull-out bolt, and the compressive force is received by the column from the horizontal member. However, since the joint metal has a much higher strength than wood, there has been a demand to disperse this compressive force in the joint metal.
Furthermore, there is a possibility that a large shearing force acts on the pulling bolt due to the vertical movement of the horizontal member. Of course, there is a demand to disperse the shearing force on the assumption that a very large force is applied instantaneously even though the pulling bolt has a proof strength that can resist the shearing force.
The present invention is for solving the above-mentioned problems. The object is to provide a mounting structure for a joint fitting that is more resistant to various stresses generated when an external force is applied.

In order to solve the above-mentioned problem, in the device according to claim 1, the side of the first structural member is abutted against the end of the second structural member via a joint fitting, and both structural members are disposed via the joint fitting. And a bolt member inserted from the outer side to the inner side of the first structural member, the bolt members being close to both ends of the main body. A male screw portion screwed on the outer periphery, a lag screw screw portion screwed on the outer periphery between the male screw portions of the main body, and a screw screwed on the male screw portions. A bolt insertion hole formed of first and second washer members that respectively contact the outer surface and the inner surface of the first structural member, and the joint fitting contacts the side surface of the first structural member And the second plate extending forward from the front surface of the fixed plate body. And an insertion plate piece inserted into an insertion groove formed in the lip portion of the structural material, and at least a second washer member disposed on the side of the joint fitting is formed on a side surface of the first structural material. The fixing plate body of the joint fitting accommodated in a recess having the same depth as the thickness of the second washer member abuts against the outer end surface of the second washer member, and the tip of the bolt member is the tip of the joint fitting. The gist of the invention is that the fixed plate body protrudes from the bolt insertion hole formed in the fixed plate body to the front side of the fixed plate body and is sandwiched between the side surface of the first structural member and the fastening member. .
As a result, the bolt member is arranged on the first structural member with a strong fixing force by the lag screw threaded portion, and the joining metal fitting is attached to the side surface of the first structural member by the fixing plate body and screwed to the main body of the bolt member. The end face of the second washer member thus formed is also faced.

According to the second aspect of the present invention, the end of the second structural material is abutted against the side surface of the first structural material via the joint metal fitting, and the two structural materials are joined via the joint metal fitting. It is a mounting structure of a joint metal fitting to a first structural material, and a bolt member is inserted through the first structural material from the outer side to the inner side, and the bolt member is screwed around the outer periphery of the main body. A male screw part, a head part that comes into contact with the outer surface of the first structural member formed integrally with the base end of the main body, and the first screwed on the outer periphery between the head part and the male screw part A lag screw threaded portion that is screwed to the structural member, and a washer member that is in contact with an inner surface of the first structural member threadedly engaged with the male threaded portion, and the joining bracket is the first structural material A fixed plate body formed with bolt insertion holes that are in contact with the side surfaces of the fixed plate body, and forward from the front surface of the fixed plate body And an insertion plate piece inserted into an insertion groove formed in the end portion of the second structural material, and at least the washer member is a thickness of the same washer member formed on the side surface of the first structural material The bolt insertion formed by the fixing plate body of the joint fitting being in contact with the outer end surface of the washer member, the tip of the bolt member being formed in the fixing plate body of the joint fitting. The gist of the invention is that the fixed plate body protrudes from the hole to the front side of the fixed plate body and is sandwiched between the side surface of the first structural member and the fastening member.
As a result, the bolt member is arranged on the first structural member with a strong fixing force by the lag screw threaded portion, and the joining metal fitting is attached to the side surface of the first structural member by the fixing plate body and screwed to the main body of the bolt member. The end face of the second washer member thus formed is also faced.

Further, in the device according to claim 3, in addition to the configuration of the device according to claim 1, the first washer member is accommodated in a recess deeper than the recess for the second washer member. The gist.
The gist of the invention described in claim 4 is that, in addition to the configuration of the invention of claim 2, the head portion includes a passive rotational force portion.
As a result, the rotational force can be passively passed through the head portion by the rotational force passive portion of the bolt member, and the main body can be bitten into the wood portion around the through hole by the action of the lag screw screw portion.
Further, in the device according to claim 5, in addition to the configuration of any device according to any one of claims 1 to 4, the washer member is formed in a disk shape, and the female screw portion on the inner periphery of the through hole formed at the center thereof. The gist is that it is screwed with the male screw portion of the main body.
The gist of claim 6 is that, in addition to the configuration of any one of claims 1 to 5, the washer member includes a rotational force passive portion.
As a result, the rotational force can be passively passed through the washer member by the rotational force passive portion of the bolt member, and the main body can be bitten into the wood portion around the through hole by the action of the lag screw screw portion.
Further, the gist of the invention described in claim 7 is that, in addition to the configuration of the invention of claim 6, the rotational force passive portion is formed on the upper surface of the washer member.

  By constructing as described above, in the device of each of the above claims, when an external force is applied around the joint portion of the first structural member of the joint fitting, the stress is distributed, so that the stress is more than conventional. It is possible to provide a mounting structure for a joint metal fitting having strength.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments embodying the attachment structure of the present invention will be described below with reference to the drawings.
Example 1
As shown in FIG. 1, the embedded metal fitting 1 made of an alloy according to the first embodiment includes a long and solid main body 2 having a circular cross section. Male screw portions 3 are screwed on the outer periphery of the main body 2 near both ends. A lag screw thread portion 4 is screwed on the outer periphery between the same male thread portions 3 of the main body 2. A threaded washer 5 shown in FIG. 2 is screwed into the male thread portion 3 of the main body 2 of the embedded metal fitting 1. A screwed washer 5 as a washer member has a disk shape, and a through hole 6 is formed at the center thereof. A female screw portion 7 is screwed on the inner peripheral surface of the through hole 6. The threaded washer 5 is provided with a pair of small through-holes 8 having a circular cross section at positions opposed to each other by 180 degrees with the through-hole 6 interposed therebetween. In the first embodiment, two screw washers 5a and 5b are used.

A method of using such an embedded metal fitting 1 for fixing a T-shaped metal fitting 10 as a joining metal fitting to a column will be described.
As shown in FIGS. 3 and 7, a T-shaped bracket 10 made of rolled steel is composed of a substantially rectangular base plate 11 and an insertion plate piece 12. The insertion plate piece 12 extends rearward from the center so as to be orthogonal to the base plate 11, and the T-shaped fitting 10 as a whole has a substantially T-shaped planar shape. Bolt through holes 14 are formed in the base plate 11 at two locations on the upper and lower sides. A semicircular bolt space 15 is formed in the insertion plate piece 12 at a position corresponding to the bolt through hole 14.
The insertion plate piece 12 is formed with a notch 16 and two pin through holes 17. The notch 16 and the pin through-hole 17 are locations where the drift pin 19 is engaged.
On the other hand, recesses 20 and 21 are formed in advance on two opposing surfaces of the column 18 to which the T-shaped fitting 10 is mounted. As shown in FIG. 5, a through-hole 23 is formed so as to pass from one recess 20 to the center of the other recess 21. The depth (front-rear width) of the concave portion 21 on the inner side on which the T-shaped fitting 10 is attached coincides with the height of the screw washer 5b. The outer recess 20 is deeper than the inner recess 21. In the first embodiment, since the bolt through holes 14 of the T-shaped metal fitting 10 are two in the upper and lower directions, the recesses 20 and 21 and the through hole 23 are also formed in two upper and lower stages.

First, as shown in FIG. 1B, the first threaded washer 5a is screwed into one male threaded portion 3 of the embedded metal fitting 1. As shown in FIG. The threaded washer 5a extends in the axial direction up to the joint between the male thread part 3 and the lag screw thread part 4, and since there is no further thread, it cannot be advanced and the threaded washer 5 is rotated when it is further rotated. The force rotates the embedded metal fitting 1 itself in a direction in which the lag screw screw portion 4 bites into the wood material.
For example, an impact wrench 24 as shown in FIG. 10 is used to attach the embedded metal fitting 1 to the column 18. A special tool 25 that can be inserted into the pair of small through holes 8 is attached to the socket 24 a of the impact wrench 24.
First, as shown in FIG. 5, the tip of the main body 2 of the embedded metal fitting 1 (that is, the side where the screwed washer 5a is not mounted) is arranged at the position of the through hole 23 opened to the concave portion 20 side. In this state, the tip of the special tool 25 of the impact wrench 24 is inserted into the small through hole 8 of the screw washer 5a, and the impact wrench 24 is driven while applying a load. As a result, the embedded metal fitting 1 rotates and advances while the main body 2 is biting into the wood portion around the through hole 23 by the action of the lag screw screw portion 4 using the through hole 23 as a guide hole. The lag screw screw portion 4 is screwed into the column 18 while biting into the column 18. As shown in FIG. 6, the mounting of the embedded metal fitting 1 to the column 18 is completed in a state where the back surface of the screw washer 5 a is in contact with the bottom surface of the recess 20. This is performed for the upper and lower concave portions 20 and 21 and the through hole 23.

In this state, the tip of the body 2 of the embedded metal fitting 1 protrudes from the inner surface of the column 18. Then, the second threaded washer 5b is screwed into the male thread portion 3 protruding from the inner recess 21 side. As shown in FIG. 6, the threaded washer 5 b is in contact with the bottom surface of the recess 21, so that the outer surface (icicle) of the column 18 and its own outer surface are exactly aligned. At this stage, the bolt through hole 14 of the base plate 11 of the T-shaped bracket 10 is inserted into the upper and lower male screw portions 3 of the embedded bracket 1 protruding from the column 18, and finally, in the bolt space 35. A nut 26 as a fastening member is screwed into the projecting male screw portion 3 to fasten and fix the T-shaped fitting 10 to the column 18 (state shown in FIGS. 3 and 4). At this time, the outer end surface of the screwed washer 5b and the front surface of the base plate 11 abut. As a result, the pressing force from the T-shaped metal fitting 10 is transmitted to the main body 2 of the embedded metal fitting 1 through the screw washer 5b.
In this way, the beam 27 is set on the column 18 to which the T-shaped fitting 10 is attached as shown in the arrow of FIG. 3 and FIG. 7 and fixed by the drift pin 19 from the side surface, thereby completing the rigid joint.

By configuring as in the first embodiment, the following effects are achieved.
(1) Conventionally, when a strong tensile force is applied to the beam 27, the tensile stress generated in the bolt for fixing the T-shaped metal fitting can be held only by the washer. However, by using the embedded metal fitting 1 of the second embodiment, the tensile stress of the double pulling bolt can be held by both the threaded washer 5a and the lag screw threaded portion 4. It can be made small.
(2) When a pressing force is applied to the column 18 from the direction of the beam 27, conventionally, the pressing force is hardly transmitted to the bolt for fixing the T-shaped bracket, and is simply received by the side surface of the column. Met. However, since it is configured as described above, when a pressing force is applied to press the column from the beam 27 direction, the pressing force is transmitted from the T-shaped bracket 10 to the embedded bracket 1 via the screw washer 5b. And since the embedded metal fitting 1 can resist the pressing force by both the threaded washer 5b and the lag screw screw portion 4, the force can be distributed to the embedded metal fitting 1 having a high resistance to stress. Contributes to improved strength.
(3) When a shearing force is applied to the column 18 so that the beam 27 moves in the vertical direction, conventionally, the bolt for fixing the T-shaped metal fitting has a resistance to the shearing force. However, since the threaded washer 5b that is firmly screwed to the main body 2 is disposed closest to the T-shaped fitting 10 of the main body 2 as in the first embodiment, it is wider than the main body 2 with respect to the shearing force. The threaded washer 5b can counteract very efficiently.
(4) With the passage of time, a phenomenon occurs in which the structural material becomes thin, that is, shrinks compared to the original. In that case, conventionally, the washer may float from the column surface and the T-shaped fitting 10 may not be pulled firmly. In this case, if a strong pulling force is applied, acceleration is applied, so that the load applied to the washer portion may become larger. In the embedded metal fitting 1 of the second embodiment, since the lag screw thread portion 4 is screwed into the column 18, the screw washer 5 is difficult to float from the column 18, and even if the screw washer 5 a is floated, the lag screw Since the threaded portion 4 is screwed into the column 18, it is possible to counter the tensile stress generated in the main body 2 due to the tensile force even when aged.

(Example 2)
As shown in FIGS. 8 and 9, the embedded bracket 31 made of an alloy according to the second embodiment includes a long and solid main body 32 having a circular cross section. A male screw portion 33 is screwed on the outer periphery of the main body 32 near the tip. A head portion 34 having a regular hexagonal outer peripheral shape is integrally formed at the rear end of the main body 32.
A lag screw screw portion 35 is screwed around the outer periphery between the head portion 34 and the male screw portion 33 of the main body 32.
As shown in FIG. 9, the embedded metal fitting 31 of the second embodiment is also used to fix the T-shaped metal fitting 10 as the joining metal fitting to the pillar, similarly to the first embodiment. The head portion 34 is different from the first embodiment in that the general wrench can be used as the six-rotation force passive portion. Therefore, a standard tool is attached to the socket 24a of the impact wrench 24 and the head portion 34 is attached. It is possible to apply a rotational force by engaging. Detailed mounting work of the embedded metal fitting 31 is the same as described above, and is therefore omitted. As shown in FIG. 8, an ordinary washer 37 is disposed between the head portion 34 and the column 18. In the second embodiment, the same effect as that of the first embodiment is achieved with respect to the threaded washer 5b on the T-shaped metal fitting 10 side.

The above embodiment may be embodied as follows.
-The shape of the said embedded metal fittings 1 and 21 is an example, Comprising: For example, the length of the main bodies 2 and 22, the number of turns of the lag screw screw parts 4 and 33, a pitch, etc. can be changed suitably. Further, the size and thickness of the screw washers 5a and 5b can be appropriately changed.
-It is also possible to use a joint fitting having a shape other than the T-shaped fitting 10.
In FIG. 3, the case where the beam 27 is joined to one surface of the column 18 is taken as an example, but the present invention can also be applied to the case where the beam 27 is joined to both surfaces.
In the embedded metal fitting 1 of the first embodiment, the small through-hole 8 is used as the rotational force passive portion, and the hexagonal head portion 34 is used in the second embodiment. However, other shapes may be used. .
In the above embodiment, the T-shaped bracket 10 of the threaded washer 5b on the T-shaped bracket 10 side is arranged so that the outer surface (icicle) of the column 18 and the outer surface of the column 18 coincide with each other. In order to make the front surface of the plate 11 come into strong contact, the tip of the washer 5b is slightly protruded from the outer surface of the column 18 and is tightened with a nut 26 so that the washer 5b is inserted into the recess 21 via the T-shaped fitting 10. The contact surface between the outer end surface of the washer 5 b and the front surface of the base plate 11 may be pushed back to be the outer surface of the column 18. In this case, the height of the washer 5b is set slightly larger than the depth of the recess 21.
-In addition, it is free to implement in a mode that does not depart from the spirit of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS (a) of the embedded metal fitting used in Example 1 of this invention is a front view, (b) is the front view which mounted | wore with (a) the screw washer. FIG. 3 is a partially broken front view showing the right side broken along the vertical center line. BRIEF DESCRIPTION OF THE DRAWINGS It is a screw washer used in Example 1 of this invention, (a) is a perspective view, (b) is the partially broken front view fractured | ruptured in the center. Explanatory drawing explaining the state which fixes a joining metal fitting to a pillar in Example 1, and is going to arrange | position a beam in a joining metal fitting position further. The partial expanded sectional view of the state which fixed the joining metal fitting to the pillar in Example 1 with the embedded metal fitting and the screw washer. Explanatory drawing explaining a part of attachment process of the joining metal fitting in the state which applied the embedded metal fitting to the through-hole of the pillar in Example 1. FIG. Explanatory drawing explaining a part of attachment process of the joining metal fitting in the state which attached the embedded metal fitting to the pillar in Example 1. The plane exploded view for demonstrating the attachment state of a joining metal fitting. The front view of the embedded metal fitting used in Example 2 of this invention. The partial expanded sectional view of the state which fixed the joining metal fitting to the pillar with the embedded metal fitting and the screw washer in Example 2. FIG. The side view of the state which attached the tool to the impact wrench which provides a rotational force to a present Example.

  DESCRIPTION OF SYMBOLS 1,31 ... Wood material embedded metal fittings as bolt members, 2, 32 ... Main body, 3 ... Male screw portion, 4, 35 ... Lug screw screw portion, 5a, 5b ... Screw washer as washer member, 10 ... Joining T-shaped metal fitting as a metal fitting, 11 ... base plate as a fixing plate, 12 ... insert plate piece, 25 ..., 18 ... pillar as first structural member, 26 ... nut as fastening member, 27 ... second structure Beam as material.

According to a third aspect of the present invention, in addition to the configuration of the first aspect of the invention, the first washer member is accommodated in a recess deeper than the recess for the second washer member. The gist.
According to a fourth aspect of the present invention, in addition to the configuration of the second aspect of the invention, the gist of the invention is that the head portion includes an engaging portion that passively rotates.
Thus, the bolt member can be caused to pass through the head by the engaging portion that passively passes the rotational force, and the main body can be bitten into the wood portion around the through hole by the action of the lag screw screw portion.
Moreover, in addition to the structure of any one of Claims 1-4, in the invention of Claim 5, the said washer member is made into disk shape, and the said female screw part of the inner periphery of the through-hole formed in the center is said. The gist is that it is screwed with the male screw portion of the main body.
Further, the gist of the invention described in claim 6 is that, in addition to the configuration of any one of the inventions of claims 1 to 5, the washer member is provided with an engaging portion that passively rotates.
Accordingly, the bolt member can be caused to pass through the washer member by the engaging portion that passively passes the rotational force, and the main body can be bitten into the wood portion around the through hole by the action of the lag screw screw portion.
The gist of the invention according to claim 7 is that, in addition to the configuration of the invention of claim 6, the engaging portion for passively passing the rotational force is formed on the upper surface of the washer member.

(Example 2)
As shown in FIGS. 8 and 9, the embedded bracket 31 made of an alloy according to the second embodiment includes a long and solid main body 32 having a circular cross section. A male screw portion 33 is screwed on the outer periphery of the main body 32 near the tip. A head portion 34 having a regular hexagonal outer peripheral shape is integrally formed at the rear end of the main body 32.
A lag screw screw portion 35 is screwed around the outer periphery between the head portion 34 and the male screw portion 33 of the main body 32.
As shown in FIG. 9, the embedded metal fitting 31 of the second embodiment is also used to fix the T-shaped metal fitting 10 as the joining metal fitting to the pillar, similarly to the first embodiment. The difference from the first embodiment is that the head portion 34 is shaped so that a general wrench can be used as an engaging portion that passively passes six rotational forces. Therefore, a standard tool is attached to the socket 24a of the impact wrench 24, and It is possible to apply a rotational force by engaging with the head portion 34. Detailed mounting work of the embedded metal fitting 31 is the same as described above, and is therefore omitted. As shown in FIG. 8, an ordinary washer 37 is disposed between the head portion 34 and the column 18. In the second embodiment, the same effect as that of the first embodiment is achieved with respect to the threaded washer 5b on the T-shaped metal fitting 10 side.

The above embodiment may be embodied as follows.
-The shape of the said embedded metal fittings 1 and 21 is an example, Comprising: For example, the length of the main bodies 2 and 22, the number of turns of the lag screw screw parts 4 and 33, a pitch, etc. can be changed suitably. Further, the size and thickness of the screw washers 5a and 5b can be appropriately changed.
-It is also possible to use a joint fitting having a shape other than the T-shaped fitting 10.
In FIG. 3, the case where the beam 27 is joined to one surface of the column 18 is taken as an example, but the present invention can also be applied to the case where the beam 27 is joined to both surfaces.
In the embedded metal fitting 1 of the first embodiment, the small through hole 8 is used as the engaging portion that passively receives the rotational force, and the hexagonal head portion 34 is used in the second embodiment. Is also possible.
In the above embodiment, the T-shaped bracket 10 of the threaded washer 5b on the T-shaped bracket 10 side is arranged so that the outer surface (icicle) of the column 18 and the outer surface of the column 18 coincide with each other. In order to make the front surface of the plate 11 come into strong contact, the tip of the washer 5b is slightly protruded from the outer surface of the column 18 and is tightened with a nut 26 so that the washer 5b is inserted into the recess 21 via the T-shaped fitting 10. The contact surface between the outer end surface of the washer 5 b and the front surface of the base plate 11 may be pushed back to be the outer surface of the column 18. In this case, the height of the washer 5b is set slightly larger than the depth of the recess 21.
-Besides, it is free to implement in a mode that does not depart from the gist of the present invention.

Claims (7)

The end of the second structural material is abutted against the side surface of the first structural material via the joint metal fitting, and the joint metal fitting is attached to the first structural material when the two structural materials are joined via the joint metal fitting. Structure,
A bolt member is inserted into the first structural member from the outer side to the inner side, and the bolt member is threaded on the outer periphery near both ends of the main body, and the outer periphery between the male screw portions of the main body. A lag screw thread portion screwed into the first structural member screwed to the first structural member, and a first and a second contact portion respectively in contact with an outer surface and an inner surface of the first structural member threaded into the male screw portions. Composed of two washer members,
The joint fitting includes a fixed plate body in which a bolt insertion hole is formed in contact with a side surface of the first structural member, and a front end of the second structural member that extends forward from the front surface of the fixed plate member. An insertion plate piece to be inserted into the insertion groove formed in
At least the second washer member disposed on the side of the joint fitting is housed in a recess having the same depth as the thickness of the second washer member formed on the side surface of the first structural member. The fixed plate body abuts on the outer end surface of the second washer member, and the front end of the bolt member protrudes from the bolt insertion hole formed in the fixed plate body of the joint fitting to the front side of the fixed plate body. A mounting structure for a joint fitting, wherein the fixing plate is sandwiched between a side surface of a first structural member and a nut member. The end of the second structural material is abutted against the side surface of the first structural material via the joint metal fitting, and the joint metal fitting is attached to the first structural material when the two structural materials are joined via the joint metal fitting. Structure,
A bolt member is inserted from the outer side to the inner side in the first structural material, and the bolt member is formed integrally with the male screw part screwed on the outer periphery near the distal end of the main body and the base end of the main body. A head portion that contacts the outer surface of the first structural member; a lag screw thread portion that is screwed to the first structural member that is screwed on an outer periphery between the head portion and the male screw portion; and the male screw A washer member that abuts against the inner surface of the first structural member screwed into the portion,
The joint fitting includes a fixed plate body in which a bolt insertion hole is formed in contact with a side surface of the first structural member, and a front end of the second structural member that extends forward from the front surface of the fixed plate member. An insertion plate piece to be inserted into the insertion groove formed in
At least the washer member is housed in a recess having the same depth as the thickness of the washer member formed on the side surface of the first structural member, and the fixing plate body of the joint fitting contacts the outer end surface of the washer member. The front end of the bolt member protrudes from the bolt insertion hole formed in the fixed plate body of the joint fitting to the front side of the fixed plate body, and is fixed by the side surface of the first structural member and the nut member. A mounting structure for a joining metal fitting, characterized in that the metal fitting is clamped. 2. The attachment structure for a joint fitting according to claim 1, wherein the first washer member is housed in a recess deeper than the recess for the second washer member. 3. The wood-embedded metal fitting according to claim 2, wherein the head portion includes a rotational force passive portion. The said washer member is made into disk shape, and is screwed together with the said external thread part of the said main body by the internal thread part of the through-hole inner periphery formed in the center. The mounting structure of the joint fitting described in the above. The attachment structure for a joint fitting according to any one of claims 1 to 5, wherein the washer member includes a rotational force passive portion. The attachment structure for a joint fitting according to claim 6, wherein the rotational force passive portion is formed on an upper surface of the washer member.

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