JPH059122Y2 - - Google Patents

Description

[Detailed description of the invention] <Industrial application field> The present invention relates to laminated timber, and more specifically, it is formed as a large-section laminated timber for structural use, and a nail is inserted between the joint surfaces of each laminated lamina. A mesh-like reinforcing material is interposed therebetween.

<Prior art> In order to improve the bending rigidity of a laminated timber made by bonding and integrating a plurality of stacked lamina, it has conventionally been possible to embed, for example, a plate-shaped reinforcing material such as metal in the outer layer of the stacked lamina. It has been proposed (1986)
−128005).

<Problems to be solved by the invention> However, conventional laminated timber with plate-shaped reinforcing materials such as metal embedded therein poses no problems when formed as a straight timber, but when formed as a curved timber. The problem is that the reinforcing material has a low ability to follow the displacement that occurs between the joint surfaces of the lamina when it is curved, so the fixation of the reinforcing material and the lamina at the end of the laminated wood becomes uncertain, resulting in a decrease in bending rigidity. There is.

<Means for solving the problem> The present invention was devised to solve the above problem, and it involves interposing a mesh-like reinforcing material between the joint surfaces of the outer layer of laminated lamina. It is made of laminated wood.

<Function> By making the reinforcing material into a mesh shape, the mesh part stretches between the joint surfaces of the curved lamina, so the followability of the reinforcing material itself improves, and the claws provided on the reinforcing material also extend between the joint surfaces of the lamina. It bites in and resists the shearing force generated between the joint surfaces.

<Example> An example of the present invention will be described below based on the drawings.

FIG. 1 is a schematic cross-sectional view of the laminated timber of the present invention, and FIG. 2 is an exploded view of the same essential parts.

As shown in the figure, the laminated timber of the present invention is constructed by laminating a plurality of laminae 1, and between the outer layer portions of the laminae 1, that is, the lamina 1 where large edge stress occurs when bending. For example, the reinforcing material 2 is interposed at the joints 11 and 12 between the two outermost lamina 1a, the second lamina 1b from the outermost layer, and the third lamina 1c from the outermost layer, and the joints are bonded with an adhesive or the like. It is formed by integrating.

The reinforcing material 2 has approximately the same length as the lamina 1, and is made of a mesh made of a stretchable material such as iron wire, carbon fiber, or aramid fiber having a high Young's modulus, as shown in the perspective views of FIGS. 3a to 3e. It is formed into a shape, and at each intersection of the mesh there is a claw 2 that bites into the lamina 1.
1 is provided facing vertically or upwardly or downwardly. By inserting these claws 21 into the lamina 1, the connection between each lamina 1 and the reinforcing material 2 is ensured, and the mesh portion of the reinforcing material 2 stretches between the joint surfaces of the lamina, making it possible to follow the bending of the laminated wood. is obtained.

Further, as shown in FIGS. 4a and 4b, a mesh-shaped groove 14 in which the reinforcing material 2 is embedded is formed on either or both of the opposing joint surfaces 13, 13 of the lamina 1, with the reinforcing material 2 interposed therebetween. By doing so, the reinforcing material 2 can be interposed without increasing the cross-sectional area of the laminated wood.

With the above configuration, a laminated timber with high bending rigidity and high compressive stress and tensile stress in the longitudinal direction can be obtained. Furthermore, by forming the reinforcing material 2 into a mesh shape as described above, even when the laminated wood is formed into a curved material, the reinforcing material 2 has great followability between the joint surfaces of the curved lamina, and even at the ends, the lamina 2
and reinforcing material 2 are reliably joined. Furthermore, the claws 21 provided on the reinforcing member 2 bite into the joints 11 and 12, and can sufficiently resist the shearing force between the joint surfaces. High bending rigidity is ensured.

<Effects of the invention> As described above, according to the invention, even if the adhesive between each lamina deteriorates, the durability of the laminated timber does not deteriorate. Therefore, it is ideal as a large cross-section laminated timber for structural purposes, not only as a straight timber but also as a curved timber.

[Brief explanation of the drawing]

Figure 1 is a cross-sectional schematic diagram of the laminated timber of the present invention, Figure 2
The figures are exploded views of the same essential parts, Figures 3a to 3e are perspective views of the reinforcing material, and Figure 4 is a schematic diagram showing a state in which grooves are provided in the lamina. 1, 1a, 1b, 1c...lamina, 11, 12
...Joint part, 2...Reinforcement material, 21...Claw.

Claims (1)

[Claims for Utility Model Registration] In a structural laminated timber made by bonding and integrating a plurality of laminated lamina, a mesh-like structure is formed between the bonded surfaces of the laminated lamina, and 1. A structural laminated timber characterized by interposing a reinforcing material having claws whose tips point upward and/or downward at mesh intersections.