JPH0734965Y2 - Bonded structure of laminated wood - Google Patents

Description

[Detailed Description of the Invention] [Industrial application] The present invention relates to a bonded structure for laminated wood, and more particularly to a bonded structure for laminated wood capable of improving fire resistance.

[Prior Art] Conventionally, a laminated material used for various purposes as a structural material or a structural material has been known.

This laminated lumber is made by using raw materials such as cedar, cypress, oak, lauan, etc., and making the fiber directions of a sawing board or small timber parallel to each other, and laminating and adhering in the length, width, and thickness directions. It is a material with excellent fire resistance compared to steel as a material.

An example of such a laminated-material joining structure is a laminated-material joining structure as shown in FIG. This is two laminated wood
At the joint part A of the laminated timber temporarily joined by interposing the guide members 3,3 between the first and second members, the steel is spread over the respective faces 1a, 2a and 1b, 2b of the two laminated members 1, 2. Joining plate 4,4
And the joining plates 5 and 5 are arranged, and the joining plates 4 and 4 are joined to each other by a plurality of bolts 6,6, ..., and the joining plates 5 and 5 are joined to each other by a plurality of bolts 7,7 ,. is there.

[Problems to be solved by the invention] By the way, according to the conventional joining structure of laminated wood, the joining plates 4,5, ... And the bolts 6,7 ,. It was For example, at the time of fire, the joint plates 4,5, ... and the bolts 6,7, ...
When heated back and forth, these strengths decrease and the laminated wood
The joint between 1 and 2 could loosen and come off. In particular, when the joining plates 5 and 5 receive a tensile force, there is a problem that some coating is required on these joining plates 5 and 5 because the joining plates 5 and 5 cannot be exposed due to the burnout design.

As described above, the conventional method includes various problems, and there is an urgent need for improvement.

The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a joining structure for laminated wood, which solves the above various problems.

[Means for Solving the Problems] In order to solve the above problems, the present invention employs the following joining structure of laminated wood. That is, the present invention is characterized in that a PC steel material is provided so as to extend over both of the two laminated members to be joined, and the joined portion of the laminated members is tightly bound by the PC steel member.

[Operation] The tensile force introduced by the PC steel material reduces the tensile force generated in the fiber direction at the joint portion of the laminated wood, and relaxes or cancels it.

[Embodiment] FIG. 1 and FIG. 2 are views showing an embodiment of the present invention, in which reference numeral B is a laminated member joining structure according to the present invention.

In this bonded structure B of the laminated wood, the end portions 11a, 12a of the laminated wood 11, 12 are joined to each other via the guide members 13, 13, and a plurality of PC steel materials 14, 14 are provided near the upper end of the joined portion. Further, a plurality of PC steel materials 15, 15 ... Are arranged near the lower end.

The PC steel material 14 is provided in the vicinity of the upper end of the joint portion of the laminated members 11 and 12, straddles both the upper end surface 11b of the laminated member 11 and the upper end surface 12b of the laminated member 12, and the upper end surface 11b and the upper end surface. 12b
It is arranged along each longitudinal direction. The end portion 14a of the PC steel material 14 is fixed to the upper end surface 11b of the laminated material 11 by the fixing hardware 21.
The end portion 14b is fixed to the laminated wood 12 by the fixing hardware 22.
Is fixed to the upper end surface 12b of the. This PC steel material 14 has an upper end surface 11b of the laminated material 11 and an upper end surface 1 of the laminated material 12 by an adhesive 23.
It is fixed on both sides.

The PC steel material 15 is provided in the vicinity of the lower end of the joint portion of the laminated members 11 and 12, and passes from the upper end surface 11b of the laminated member 11 to the lower end portion of the joint portion of the laminated members 11 and 12 and the upper end surface 12b of the laminated member 12. It is arranged in a substantially L-shape extending to the
It abuts under both ends of 24. The end 15a of this PC steel material 15
Is fixed to the upper end surface 11b of the laminated material 11 by the fixing hardware 25,
Further, the end portion 15b is fixed to the upper end surface 12b of the laminated member 12 by the fixing hardware 26. The PC steel material 15 is fixed to both the laminated members 11 and 12 with an adhesive 27.

Then, the joint portions of the laminated members 11 and 12 are tightly connected by the PC steel materials 14, 15, ....

In order to bind the PC steel members 14, 15, ... together, the end portions 11a, 12a of the laminated members 11, 12 are joined together via the guide members 13, 13, and a plurality of PC steel members are provided near the upper end of the joined portion. After disposing 14,14 and a plurality of PC steel materials 15,15, ... near the lower end,
Steel materials 14, 15, ... Apply a tensile force in the axial direction of each and tighten them. After that, both ends of the PC steel materials 14, 15, ... Are fixed to the upper end surface 11b of the laminated material 11 and the upper end surface 12b of the laminated material 12, respectively, by the fixing hardware 21,2.
Fixed at 2,… In this way, tension is introduced into the joint between the laminated members 11, 12.

As shown in this embodiment, PC steel materials 14, 15, ...
Introducing a tension force that gives an appropriate compressive force to the joints of 1 and 12 reduces the tensile force generated in the fiber direction at the joints of the laminated members 11 and 12, and relaxes or cancels them.

In this bonded structure B of the laminated wood, the end portions 11a, 12a of the laminated wood 11, 12 are joined to each other via the guide members 13, 13, and a plurality of PC steel materials 14, 14 are provided near the upper end of the joined portion. Further, since a plurality of PC steel materials 15, 15, ... Are arranged near the lower end and are tightly bound by these PC steel materials 14, 15, .., the following excellent effects can be obtained.

(A) The tensile force generated in the fiber direction at the joint portion between the laminated members 11 and 12 can be reduced, relaxed or canceled, and therefore the bending of the joint portion between the laminated members 11 and 12 can be reduced.

(B) Even when a large bending moment is applied, the size of the joining plate can be limited by using the conventional joining plate and the bolt together.

(C) At the joint portion between the laminated members 11 and 12, the joint plate and the bolt are not exposed unlike the conventional case, so that the covering material is not required and the design process is facilitated.

In the above example, the PC steel material 15 is the laminated wood material 11
The upper end surface 11b of the laminated body 11 and the upper end surface 12b of the laminated member 12 passing through the lower ends of the joints of the laminated members 11 and 12 are arranged in a substantially L-shape. Any structure may be used as long as it can be arranged at the joints of the joints 12 and 12, and can be changed to various structures.

[Effects of the Invention] This invention has a PC steel material that is disposed over both of the two laminated lumbers to be joined, and the joining portion of the laminated lumber is tightly bound by the PC steel material. The excellent effect of can be achieved.

(A) It is possible to reduce the tensile force generated in the fiber direction at the joint portion of the laminated material, and relax or cancel it. Therefore, the bending of the joint portion of the laminated member can be reduced.

(B) Even when a large bending moment is applied, the size of the joining plate can be limited by using the conventional joining plate and the bolt together.

(C) Since the joining plate and the bolt are not exposed at the joint portion of the laminated material unlike the conventional case, the covering material is not required and the design process is facilitated.

From the above, it is possible to expect improvements in various points and excellent effects.

[Brief description of drawings]

1 and 2 are views showing an embodiment of the present invention, in which FIG. 1 (a) is a front view of a laminated structure for joining laminated wood, and FIG. 1 (b) is a view of FIG. 1 (a). A horizontal cross-sectional view taken along the line III-III, FIG. 2 (a) is a partial cross-sectional view of the upper end of the joint of the laminated wood, and FIG. 2 (b) is a partial cross-sectional view of the lower end of the same, FIG. (A) is a front view of a conventional laminated wood joining structure, and (b) of the same figure.
FIG. 4B is a transverse sectional view taken along line II-II of FIG. B ... Glued wood joining structure, 11,12 ... Glued wood, 14 ... First PC steel, 15 ... Second PC steel.

Claims (1)

[Scope of utility model registration request] 1. A bonded structure for laminated wood, comprising a PC steel material disposed over both of two laminated wood materials to be joined, wherein the bonded portion of the laminated wood is tightly bound by the PC steel material. .