JP3434372B2 - Truss connection jig - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joining jig for trusses, which is suitable for joining structural members in a wooden structure, and particularly for joining structural members in a truss structure.

[0002]

2. Description of the Related Art In recent years, various types of wood have been used in order to take advantage of wood and artificially improve the structural defects of natural materials such as knots to obtain large cross-sections and long wood that are difficult to obtain from natural wood. Has been developed for structural laminated wood. Along with this, there has been a demand for a truss joint jig that supports truss joints in wooden structures. The conventional joining jig for truss will be described below. 2. Description of the Related Art Conventionally, as a truss joint jig for a truss in a wooden structure, a bolt and nut is used for joining structural members. For example, in Japanese Unexamined Patent Publication (Kokai) No. 4-41831, a pair of metal connectors are radially welded to the outer periphery of a tubular hub member at regular intervals, and a wooden support member is sandwiched between the pair of metal connectors to form a bolt / nut. A lightweight dome and a connector therefor, which are fastened and fixed with a bolt, are disclosed in Japanese Utility Model Laid-Open No. 4-13703 in which a bolt embedding hole is previously drilled in an end surface of a wooden member, and a bolt is embedded in the bolt embedding hole. There is disclosed a joining device for integrally joining a wooden truss member with a bolt by tightly fixing the bolt to a joining fitting via a nut.

[0003]

However, in the above-mentioned conventional structure, when the structural members are joined, the number of parts such as bolts, nuts, washers, etc. is large and the work of fixing the structural members is complicated and the workability is poor. There was a problem. Further, there is a problem that the metal fitting is large in size and heavy and lacks in portability, and in particular, work in high places also lacks safety. In addition, a wooden support member tightened and fixed with bolts and nuts has a problem that the shrinkage of the wood causes loss of the tightening force in a few years and looseness is apt to occur, thereby lowering the physical strength. In addition, in the case, it is necessary to insert and fix the bolts to the wooden member with an adhesive beforehand, and if damage or dimensional difference occurs during construction, it is difficult to cope on site and the workability is lacking. Had. Further, it is impossible to confirm whether or not the adhesive for fixing the bolts is uniformly filled in the bolt embedding holes of the wooden member and securely adhered and fixed, which causes a problem in quality control. Furthermore, if the nut is excessively tightened when the wooden member is attached to the fitting, there is a problem in that the adhesive that bonds the bolt and the wooden member together due to the pulling force of the bolt is easily damaged and the safety is impaired. Was.

The present invention solves the above-mentioned problems of the prior art by eliminating rattling due to shrinkage of wood, easy injection of an adhesive, and reliable joining of structural members.
Truss suitable for joining structural members in a truss structure that can easily handle complex joining structures on site, significantly improve workability, workability, and reliability, and improve building productivity An object of the present invention is to provide a joining jig for use.

[0005]

To achieve this object, the present invention has the following constitution. The joining jig for a truss according to claim 1, wherein a core fitting, a hollow tubular member having a base fixed to a predetermined portion of the core fitting and having an open end, and an end of the base of the tubular member. To the hollow portion of the tubular member from the portion or side portion, the branch pipe hole portion, the branch pipe engaging portion formed in the branch pipe hole portion, and the branch pipe engaging portion. And a branch pipe having an engagement portion that is fixed or detachably engaged with the branch pipe engagement portion at one end. The joining jig for a truss according to claim 2, wherein a core metal fitting, a hollow member engaging portion formed in plural in a predetermined shape on a side wall of the core metal fitting in a convex or concave shape, and the member engaging A branch pipe engaging portion formed at an end portion of the core fitting side of the core portion, and a tubular member having an end portion having a core engaging portion that is detachably engaged with the member engaging portion, A hollow branch pipe fixed to the branch pipe engaging portion or having an end portion screwed or fitted to the branch pipe engaging portion and detachably fixed thereto. The joining jig for a truss according to claim 3, wherein a core metal fitting, an engagement hole portion for a member that is provided in a predetermined portion of a side wall of the core metal fitting, and has a screwing or fitting means inside thereof; A tubular member having a hollow portion inside which an end is opened, in which the base is screwed into the engagement hole or fixed by a fitting means, and the tubular member from the end or side of the base of the tubular member. A branch pipe hole formed in communication with the hollow portion of the member, a branch pipe engaging portion formed in the branch pipe hole, and an engagement for detachably engaging the branch pipe engaging portion. And a branch pipe formed at one end thereof. Claim 4
The truss joining jig according to any one of claims 1 to 3 has a configuration in which a ridge portion or an uneven portion is formed on the surface of the tubular member. According to a fifth aspect of the present invention, there is provided a truss joining jig according to any one of the first to fourth aspects, wherein the branch pipe is fixed to the branch pipe engaging portion.

Here, the core metal fitting of the joining jig for the truss has a cylindrical shape having a cross section of a substantially circular shape, a substantially elliptical shape, a substantially polygonal shape, or a structure in which a substantially cubic shape, a substantially rectangular parallelepiped shape, a substantially spherical shape, a substantially pyramid shape, etc. A tubular member that is made of metal such as iron, steel, or an alloy formed in a shape corresponding to the joining shape of the joining end surface of the member, and has a cylindrical member that is embedded and fixed inside the structural member on the surface that joins the structural member It is freely engaged. In addition to metal, the core metal fittings are organic or inorganic fibers such as carbon fiber, boron fiber, glass fiber, metal fiber and thermosetting resin such as silicone resin, unsaturated polyester resin, epoxy resin, polycarbonate, polyamide, It may be a molded product of a composite material with a synthetic resin such as a thermoplastic resin such as polyacetal, polyester, modified PPO polyimide, ceramics using cement, etc., or a composite product thereof, and the size and location of the structural member to be joined. It can be used properly according to. The core fitting and the tubular member may be manufactured integrally or separately.

The cross-sectional shape of the tubular member has a substantially circular shape, a substantially elliptical shape, or a substantially polygonal shape in accordance with the size and shape of the structural member to be joined, and the material thereof is a single layer or 2 of the same material as the core metal fitting. A multilayer structure in which the above different materials are laminated may be used.
This makes it possible to reduce the weight of the tubular member and control the size and strength of the tubular member. A hollow portion for inflow of the adhesive is formed from the end portion to the branch pipe engaging portion in the longitudinal direction of the substantially central portion of the cross section of the tubular member. The ridges and projections and depressions formed on the outer surface of the tubular member are those in which continuous ridges or discontinuous ridges are randomly formed, or spiral, etc. flow out from the other end of the tubular member. The adhesive functions as a buffer or weir, and is formed into a shape that fills the space between the outer surface of the tubular member and the inner peripheral wall of the communication hole of the structural member to widen the bonding area and give an anchor effect. Is desirable. Depending on the construction site and the type of adhesive (those with strong viscosity), one or several protrusions may be formed at the end of the tubular member or branch pipe on the adhesive return side, or may not be formed. . Further, the width and depth of the uneven portion such as the spiral groove may be changed according to the viscosity of the adhesive. The shape of the tubular member on the outflow side of the adhesive may be a bulge, a flat shape, or a concave shape, but it is efficient to use it properly depending on the application and the type of structural member. Further, when a guide portion such as a groove or a notch for guiding the injected adhesive to the outer surface is formed at the end of the adhesive on the side of the adhesive of the tubular member, the adhesive is smoothly transferred to the surface of the tubular member. Since it can be guided between the peripheral walls of the joining holes, the workability of injecting the adhesive can be improved.

The member engaging portion for detachably engaging the tubular member with the core metal member is formed in a convex shape, a concave shape or a hole shape on the joint surface side of the structural member of the core metal member, and the fitting portion on the surface thereof. And a threaded portion is formed. Also, at the base of the tubular member,
A concave or convex core engaging portion is formed which is screwed with the member engaging portion formed on the core fitting so as to be detachably engaged. The diameter and length of the tubular member that is fixedly or detachably engaged with the joint surface of the structural member of the core fitting may differ depending on the size and shape of the structural member to be joined. Further, the number of tubular members formed on the same joint surface may be one or plural depending on the size of the structural member and the joint structure. A hollow branch pipe for injecting an adhesive into the hollow portion of the tubular member is fixedly or detachably engaged with a side portion or an end portion of the base portion of the tubular member.

The branch pipe is made of a tubular material and is made of the same material as or different from the material of the tubular member, and the hollow portion of the tubular member and the hollow portion are engaged so as to communicate with each other. As an engaging method, a screw hole may be formed in the engaging portion of the branch pipe and an engaging portion of the tubular member and screwed, or a fitting portion may be formed and engaged by fitting or the like. When a plurality of tubular members are formed on the same joint surface of the core metal fitting, the engagement direction of the branch pipe may be changed vertically or horizontally.
If the branch pipe is detachably engaged, after injecting the adhesive,
It may be left as it is when it is disengaged from the tubular member and pulled out, or when the length of the branch pipe is short and there is no hindrance when inserting a bush or a plug.

[0010]

With this structure, the joining jig for the truss made of metal or the like, in which the core metal fitting and the tubular member are integrated, is embedded and fixed in accordance with the joining shape of the joining portion between the structural members.
The ability to respond to pulling, compression, shearing, etc. can be significantly improved. Further, since the shape, diameter, length, etc. of the joining jig for truss can be freely changed, it is possible to cope with joining forms of complicated structural members. As the joining method, the joining holes and cutting parts are formed on the contact surface of each structural member, and it is only inserted into the joining jig for the truss and the adhesive is injected, so the working process can be greatly simplified and the number of working steps is reduced. can do.
Since complicated metal fittings with a large number of parts are not used, damage loss of materials due to incorrect mounting can be prevented. The adhesive injected from the branch pipe by the adhesive injection gun flows through the hollow portion of the tubular member and the bonding hole formed in the structural member and the outer peripheral surface of the tubular member, so that the structural member Since the adhesive flows back into the adhesive visual recognition groove formed on the joint surface with the core metal fitting while filling the joining hole, it is possible to reliably prevent uneven filling of the adhesive. The protrusions and concavities and convexities formed on the surface of the tubular member prevent short-paths of the adhesive in the bonding holes, and thus prevent uneven filling of the adhesive.

[0011]

【Example】

(Embodiment 1) An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is an overall perspective view of a truss joining jig according to a first embodiment of the present invention, and FIG. 2 is a cross-sectional end view of a main part of the truss joining jig according to the first embodiment of the present invention. Reference numeral 1 is a metal truss joining jig made of metal such as stainless steel in which a tubular member is detachably connected to a core metal fitting and the hollow portions are communicated with each other, and 2 is an octagonal metal core metal fitting, and 3 is Hollow member engaging portions 4 formed in a spiral shape on the outer wall surface of the core metal fitting 2 and formed by bulging in a convex shape for screwing and engaging with a cylindrical member are made of metal and are in the shape of a hollow round bar. Tubular member,
Reference numeral 5 denotes a hollow portion formed in the longitudinal direction of the central portion of the tubular member 4 and having both ends open, for admitting an adhesive agent; 6 denotes a concavo-convex portion spirally formed on the surface of the tubular member 4; The member engaging portion 3 formed in the core metal fitting 2 in a spiral shape at the base of the member 4.
A hollow core engaging portion 8 for screwing with and engaging with, and a tubular member 4 having a bulging shape and a guide groove 8a formed on the surface thereof.
Of the adhesive outflow side, 9 is an L-shaped hollow branch pipe fixed to the inner wall surface of the core metal fitting 2 in communication with the hollow portion of the member engaging portion 3, and 10 is formed in the branch pipe 9. Member engaging part 3
The branch pipe hollow portion that communicates with the hollow portion 5 of the tubular member 4 through the hollow portion, 21 is formed inside the core metal fitting 2 on the back side of the member engaging portion 3, and the branch pipe 9 is provided inside thereof. It is a branch pipe engaging portion in which a screw groove to be screwed is formed. A method for joining the structural members will be described below using the joining jig for truss in the first embodiment of the present invention configured as described above.

(Construction Example 1) FIG. 3 is a perspective view of an essential part showing an example of truss joining using the truss joining jig in the first embodiment of the present invention, and FIG. 4 (a) is a perspective view of the present invention. FIG. 4B is a cross-sectional view of an essential part showing an example of a truss joining operation using the truss joining jig according to the first embodiment, and FIG. 4B is a truss using the truss joining jig according to the first embodiment of the present invention. It is a principal part sectional view which shows an example after joining construction. In FIG.
Reference numeral 1 is a joining jig for truss, 11 is a structural member made of laminated wood or the like for joining truss, 12 is a joining surface of the structural member 11, 1
3 is a pre-cutting method in advance, or at the construction site, a joining hole formed in the joining surface 12 of the structural member 11 to a depth that is slightly larger than the diameter of the tubular member 4 so that the tubular member 4 can be embedded; An adhesive visual recognition groove portion formed by cutting for visually recognizing the return flow of the adhesive on the abutting surface of the bonding hole portion 13 is an opening portion of the adhesive visual recognition groove portion 14. In FIG. 4, 16
Is an adhesive injection gun, and 17 is injected from the branch pipe 9 through the hollow portion 5 of the tubular member 4 and the outer surface of the tubular member 4 and the joining hole portion 1.
3, the opening 1 of the adhesive visual recognition groove portion 14 while filling the inner wall 3
Epoxy-based or polyurethane-based adhesive that is filled in 5 until the return flow is visually recognized, 18 is a tree for covering the core metal fitting 2 after joining the truss, and 19 is a core metal fitting when the core metal fitting 2 is embedded. 2, a filler made of a non-combustible material such as asbestos that fills the internal gap, 20 is the opening 15 of the adhesive visual recognition groove 14.
It is a plug that is covered with the cover and is flush with the structural member. In the construction of the present embodiment, first, the structural member 11 having the joining hole portion 13 and the adhesive visual recognition groove portion 14 is brought into contact with the core metal fitting 2 and the tubular member 4 is inserted into the joining hole portion 13, Next, the structural member 11 is attracted to the core metal fitting 2 by a support jig or the like (not shown) and temporarily fixed. Temporary fixing is performed until the adhesive is solidified and the adhesion is completed. Next, the adhesive injection gun 16 is attached to the opening of the branch pipe 9, and the adhesive 17 is passed through the hollow portion 5 of the tubular member 4 and the opening 1 of the adhesive visual recognition groove portion 14 of the structural member 11.
5 until the return of the adhesive 17 is visually recognized
To fill. As shown in FIG. 4 (a), the filling of the adhesive 17 is injected from the branch pipe hollow portion 10 as indicated by the arrow, passes through the hollow portion 5 of the tubular member 4, and the surface of the tubular member 4 and the joining hole portion 13.
Fill the gap between the wall and the surrounding wall. At this time, the channeling and short pass of the adhesive 17 are prevented by the buffer effect and the dam effect of the uneven portion 6 on the surface of the tubular member 4, and the adhesive 17 is filled with almost no leakage in the gap. Furthermore, as the injection of the adhesive 17 is continued, it is possible to visually confirm that the adhesive 17 rises while filling the gap of the adhesive visual recognition groove portion 14, so that the filling unevenness can be prevented. When the adhesive 17 is visually recognized in the opening 15 of the adhesive visual recognition groove portion 14, the injection of the adhesive 17 is stopped. The bonding holes are similarly filled with the adhesive.
Next, as shown in FIG. 4 (b), after filling the gap inside the core metal fitting 2 with a non-combustible filler material 19 such as asbestos, the upper and lower openings of the core metal fitting 2 are covered with the embedded wood 18 to form the structural member 11. Cover flush. Further, the opening 15 of the adhesive visual recognition groove portion 14 is also provided so as to be flush with the plug 20. The buried tree 18 and the plug 20 are
If the same material as that of the structural member 11 is used, the structural member 11 can be integrated with the structural member 11 without causing any discomfort when the structural member 11 is covered flush. As described above, according to the present embodiment, the shape and size of the tubular member connected to the core fitting can be freely selected at the construction site according to the size and shape of the structural member to be bonded and the size of the hole for bonding. Therefore, versatility can be significantly improved. In addition, since the tubular member is integrally connected to the core metal member and is embedded and fixed integrally between the structural members to which the joining jig for the truss is joined, it resists stresses such as bending, pulling, compressing, and shearing. The power can be significantly improved. Furthermore, since the entire joining jig for the truss is buried, the inside is protected by the carbonized film and non-combustible filler on the wood surface in the event of a fire, preventing the joining jig for the truss from melting and maintaining the structural strength.
R> Prevents buildings from collapsing and increases safety.
In this embodiment, one tubular member and one joining hole are formed on the joining surface of the core metal member and the structural member, but depending on the size and application of the structural member, the joining surface may be different. Two
It is also possible to form the above-mentioned tubular members vertically and horizontally, and to form a plurality of joining holes in the structural member to join the tubular members. At this time, the branch pipes are arranged with the injection ports facing up, down, left and right so as to be convenient for injecting the adhesive.

(Embodiment 2) FIG. 5 is an overall perspective view of a truss joining jig in a second embodiment of the present invention, and FIG. 6 is a main part of a truss joining jig in a second embodiment of the present invention. It is a sectional end view. The truss joining jig 1a of the second embodiment is different from that of the first embodiment in that the core metal fitting 2a is formed in a trapezoidal cylindrical shape having an inverted quadrangular pyramid shape, and a base portion 4a 'of a cylindrical member 4a is formed.
Is welded to the core fitting 2a, and an engaging portion 9a 'formed at one end of a hollow rod-shaped branch pipe 9a is attached to a base portion 4a' of the tubular member 4a.
The point is that a branch pipe engaging portion 21 for detachably engaging is provided. Here, the stepped portion is provided on the base portion of the surface of the cylindrical member 4a, but it may be uneven so as to enhance the damming effect of the adhesive. A method for joining the structural members will be described below using the joining jig for truss in the second embodiment of the present invention configured as described above.

(Construction Example 2) FIG. 7 is a perspective view of an essential portion showing an example of a truss joint using a truss joint jig according to the second embodiment of the present invention, and FIG. FIG. 8B is a cross-sectional end view of an essential part showing an example of a truss joining construction using the truss joining jig according to the second embodiment, and FIG. 8B shows the truss joining jig according to the second embodiment of the present invention. It is a principal part cross-section end view which shows an example after a truss joining construction. In FIG. 7, reference numeral 22 denotes a branch pipe mounting groove portion formed by cutting for mounting the branch pipe 9a on the contact surface of the joining hole portion 13a formed in the structural member 11 in a slightly larger size in accordance with the shape of the tubular member 4a, Reference numeral 23 is an opening of the branch pipe mounting groove 22. In the construction of this embodiment, first, a joining hole portion 13a having a depth at which the tubular member 4a is embedded is formed in the joining surface 12 of the structural member 11 for joining the truss with a diameter slightly larger than the diameter of the tubular member 4a. Drill with a drill. Next, a branch pipe mounting groove portion 22 for mounting the branch pipe 9a is formed in the joint surface 12 of the structural member 11 from the opening of the joint hole portion 13a toward the outer peripheral surface of the structural member 11.
Next, the structural member 11 having the joining hole 13a and the branch pipe mounting groove 22 formed therein is brought into contact with the core fitting 2a with which the branch pipe 9a is engaged. At this time, the tubular member 4a is inserted into the joining hole 13a, and the branch pipe 9a is mounted in the branch pipe mounting groove 22. Further, when an adhesive is applied to the joint surface 12 of the structural member 11 and / or the contact surface of the core metal fitting 2a, the joint of the structural member 11 can be made stronger. Next, after forming the truss structure, the structural member 11 is temporarily fixed in a state where the structural member 11 is attracted to the truss joining jig 1a using a supporting jig such as a turnbuckle or a battledore bolt. Temporary fixing is performed until the adhesive is solidified and the adhesion is completed. Next, each branch pipe 9a
The adhesive injection gun 16 is installed in the opening of the adhesive 17, and the adhesive 17 is returned to the opening 23 of the branch pipe installation groove 22 formed in the structural member 11 through the hollow portion 5a of the tubular member 4a. The joining hole 13a is filled until the flow is visually recognized. As shown in FIG. 8A, the filling of the adhesive 17 is injected from the branch pipe hollow portion 10a as shown by the arrow, passes through the hollow portion 5a of the tubular member 4a, and the surface of the tubular member 4a and the joining hole portion 13a. Fill the gap between the wall and the surrounding wall. At this time, the tubular member 4
The buffering effect of the stepped portion on the surface of a prevents the adhesive 17 from channeling or short pass, and the adhesive 17 is filled with almost no leakage. Further, when the injection of the adhesive 17 is continued, it can be visually confirmed that the adhesive 17 rises while filling the gap of the branch pipe mounting groove portion 22, so that the filling unevenness can be prevented. When the adhesive 17 is visually recognized in the opening 23 of the branch pipe mounting groove 22, the injection of the adhesive 17 is stopped and the branch pipe 9
Remove a and insert into the opening 23 of the groove 22 for mounting the branch pipe 2
Cover 0 flush. This is performed for all the bonding holes 13a. If necessary, the core metal fitting 2a is filled with a non-combustible material such as asbestos, and the openings of the upper and lower parts of the core metal fitting 2a are covered with a buried wood or the like so as to be flush with the structural member 11. It can also be integrated. Further, in the present embodiment, the joining hole 13a and the branch pipe mounting groove 22 are formed on the site in the structural member 11, but the pre-cut structural member 11 may be used. As described above, according to the present embodiment, by changing the shape of the core metal fitting in accordance with the shape of the joint end surface of the structural member for joining the truss, it is possible to easily cope with truss joints having a complicated three-dimensional structure. it can. Further, since the tubular member welded and fixed to the core metal member can be integrally embedded and fixed between the structural members joined to each other, the resistance against stress such as bending, pulling, compressing and shearing can be remarkably improved.

(Embodiment 3) FIG. 9 (a) is a sectional view of a main portion of a joining jig for truss in a third embodiment of the present invention. The truss joining jig 1b of the third embodiment differs from the truss joining jig of the first embodiment in that the core metal fitting 2 has a polygonal cross section.
b has a member engaging hole portion 24 having a thread groove inside which a tubular member 4b is detachably screwed, and the tubular member 4b has at least a base portion. The point is that it is provided with a spiral groove formed in the peripheral wall and a branch pipe engaging portion 25 for fixing the branch pipe 9b to the peripheral wall on the base side in a detachable or fittable manner.

The assembling method of the joining jig for truss of the third embodiment having the above structure will be described below.
FIG. 9B is a cross-sectional view of essential parts showing an assembling process of the joining jig for truss of the third embodiment. First, a core metal fitting 2b formed in a polyhedral cylindrical shape whose cross section is triangular, quadrangular, hexagonal or the like according to a construction site is prepared. Next, a tubular member having a predetermined strength and length that matches the diameter of the member engaging hole portion 24 that is formed at one or two places in the central portion of each side wall of the core metal fitting 2a, and that matches the construction site. 4b and branch pipe 9b are prepared.
Next, the thread groove of the base of the tubular member 4b is screwed to the thread groove of each member engaging hole 24 to a predetermined length, and the thread groove of the base of the branch pipe 9b is formed inside the branch tube engaging portion 25. Attach it to the screw groove.
Then, the construction is performed in the same manner as in the first construction example. As described above, according to the present embodiment, the core metal fitting, the tubular member, and the branch pipe can be disassembled and assembled, respectively, so that they can be disassembled and stored or transported separately, and can be assembled at the construction site during construction. It has excellent storability and transportability. Moreover, since the tubular member is screwed to the core metal fitting, adjustment can be performed according to the depth of the joining hole of the structural member, and the filling efficiency can be increased. When the thickness of the core metal fitting is thin, a reinforcing member such as a bolt having the same diameter may be provided inside the core metal fitting in the hole for the tubular member.

[0017]

As described above, according to the present invention, since the joining jig for the truss is coated with the adhesive inside the structural member, salt damage and dew condensation can be prevented, and corrosion does not occur. Further, since the adhesive is not exposed on the surface, it is not deteriorated by ultraviolet rays and the like, and the durability of the joint structure can be remarkably improved. Further, since the tubular member fixed to the core metal member is integrally embedded and fixed between the respective structural members to be joined, it is possible to remarkably improve the response force such as bending, pulling, compressing, shearing and the like. Also, depending on the size, shape, etc. of the structural members to be joined, by connecting the tubular members of different shapes and sizes that can be freely attached and detached to the core metal fittings, it is possible to easily make a truss joining jig at the construction site. The strength can be controlled artificially. Since the adhesive is returned to the visible groove on the side of the adhesive injection port, the space between the structural member joining hole and the tubular member can be completely filled with the adhesive, so there is no adhesive spot and extremely high mechanical strength. It is possible to obtain a truss joint structure having strength. Further, by covering the core metal fittings with the embedded wood, the truss joint jig cannot be seen from the outside, so that the joint structure can have an excellent appearance and the added value of the structure can be increased. At the time of fire, the carbonized coating of wood and the non-combustible filler protect the joint jig for the truss inside and do not cause thermal deformation. Therefore, it is possible to prevent collapse and secure evacuation time, etc., and significantly improve safety. As described above, an excellent bonding jig for trusses that has an extremely simple structure that uses an adhesive and a jig in combination, has strong rigidity and yield strength, and can significantly improve workability, labor saving, and rationalization during construction. Can be realized.

[Brief description of drawings]

FIG. 1 is an overall perspective view of a truss joining jig according to a first embodiment of the present invention.

FIG. 2 is a sectional view of an essential part of a truss joining jig according to the first embodiment of the present invention.

FIG. 3 is a perspective view of an essential part showing an example of truss joining using the joining jig for truss in the first embodiment of the present invention.

FIG. 4 (a) is a sectional view of an essential part showing an example of a truss joining operation using the truss joining jig according to the first embodiment of the present invention, and (b) a truss joining treatment according to the first embodiment of the present invention. Cross-sectional view of essential parts showing an example after construction of truss connection using tools

FIG. 5 is an overall perspective view of a truss joining jig according to a second embodiment of the present invention.

FIG. 6 is a sectional view of an essential part of a truss joining jig according to a second embodiment of the present invention.

FIG. 7 is a perspective view of a main part showing an example of truss joining using a truss joining jig according to a second embodiment of the present invention.

FIG. 8 (a) is a cross-sectional view of an essential part showing an example of a truss joining operation using the truss joining jig according to the second embodiment of the present invention, and (b) a truss joining treatment according to the second embodiment of the present invention. Cross-sectional view of essential parts showing an example after construction of truss connection using tools

FIG. 9A is a sectional view of a main part of a joining jig for trusses according to a third embodiment of the present invention. FIG. 9B is a sectional view of a main part showing an assembly process of the joining jig for trusses according to the third embodiment of the present invention.

[Explanation of symbols]

1,1a Truss joining jig 2,2a, 2b core metal fittings 3 member engaging part 4,4a, 4b Cylindrical member 4'a base 5,5a hollow part 6 uneven parts 7 Core engaging part 8 Adhesive outflow end 8a Adhesive guide groove 9,9a, 9b Branch pipe 9a 'engaging part 10, 10a Branch hollow 11 Structural members 12 Bonding surface 13, 13a Bonding hole 14 Adhesive visual recognition groove 15 openings 16 Adhesive injection gun 17 Adhesive 18 buried trees 19 Filling material 20 plugs 21 Engagement part for branch pipe 22 Groove for mounting branch pipe 23 opening 24 member engaging hole 25 Engagement part for branch pipe

Claims (5)

(57) [Claims] 1. A core fitting, a hollow tubular member having a base fixed to a predetermined portion of the core fitting and having an open end, and the tubular member from the end or side of the base of the tubular member. A branch pipe hole formed so as to communicate with the hollow portion of the member, a branch pipe engaging portion formed in the branch pipe hole, and a branch pipe fixing portion fixed to the branch pipe engaging portion. A joining jig for a truss, comprising: a branch pipe having an engaging portion that is detachably engaged with the joining portion and formed at one end thereof. 2. A core metal fitting, a hollow member engaging portion formed in plural in a convex shape or a concave shape on a predetermined portion of a side wall of the core metal fitting, and an end of the member engaging portion on the core metal fitting side. Fixed to the branch pipe engaging portion, a tubular member having at its end a core engaging portion that is detachably engaged with the member engaging portion Or a hollow branch pipe having an end portion screwed or fitted to the branch pipe engagement portion and detachably fixed thereto, and a truss joining jig. 3. A core metal fitting, a member engaging hole portion having a screwing or fitting means formed inside at a predetermined portion of a side wall of the core metal fitting, and a base portion is screwed into the member engaging hole portion. And a tubular member having a hollow portion having an open end, which is fixed by a wearing or fitting means, and communicates from an end portion or a side portion of the base portion of the tubular member to the hollow portion of the tubular member. A branch pipe hole, a branch pipe engaging portion formed in the branch pipe hole, and an engaging portion that detachably engages with the branch pipe engaging portion is formed at one end. A joining jig for a truss, which is provided with a branch pipe. 4. The joining jig for a truss according to claim 1, wherein a protrusion or an uneven portion is formed on the surface of the tubular member. 5. The branch pipe is fixed to the branch pipe engaging portion, wherein the branch pipe is fixed to the branch pipe engaging portion.
The joining jig for truss described in.