JPH03230903A - Preparation of laminated wood - Google Patents

Abstract

PURPOSE:To simply and rapidly arrange fibers as a reinforcing material and to reduce the number of manufacturing processes to reduce cost by performing the bonding between the laminae of at least the outer layer parts among wooden laminae to be laminated by applying an adhesive mixed with staple fibers to the surface of one lamina and mutually bonding the laminae under pressure. CONSTITUTION:Staple fibers 7 are charged in a coating hopper 3 from a staple fiber hopper 9 and an adhesive 2 is charged in the coating hopper 3 from an adhesive hopper 10. The staple fibers 7 and the adhesive 2 are mixed in the coating hopper 3 by a stirrer 8 and the adhesive 2 mixed with the staple fiber 7 is emitted to the surface of a horizontally moving wooden lamina 1 from the outflow orifice provided at the leading end of the hopper 3. The lamina coated with the adhesive 2 mixed with the staple fibers 7 is bonded to the other lamina 1. Since the laminated wood 5 thus obtained are constituted so that the staple fibers 7 having excellent tensile characteristics and high rigidity are fixed and arranged to the outer layer part of the lamina laminate 4 by the adhesive 2, the laminated wood having high bending rigidity can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a method for manufacturing a laminated timber made by gluing together a plurality of wooden lamina.

[Conventional technology]

Glulam, which is made by laminating and bonding many wooden lamina, has been widely used in various fields, but in recent years it has also been used as relatively large structural members such as beams and columns of large wooden buildings. It has become to.

Showing the manufacturing process of the laminated wood shown in Figures 4 to 6, 1 in Figure 4 is a wooden lamina, and when moving this wooden lamina 1 in the length direction, adhesive is applied above it. A hopper 3 is installed, and the adhesive 2 is discharged from the hopper 3 onto the surface of the moving lamina 1.

In this way, the adhesive 2 is applied to one side of the wooden lamina 1, and as shown in FIG. As shown in FIG. 6, the entire laminate 4 is pressed together in the stacking direction to obtain a laminated timber 5 that is integrated as a whole.

However, in this way, wooden lamina 1 can only be used with adhesive 2.
The structural properties of conventional laminated timber, which is made by joining two pieces together, are not necessarily sufficient, especially in terms of bending properties, especially when used as structural members such as beams and columns of large-scale buildings, as mentioned above. There is a problem in that the cross section has to be large.

Therefore, Japanese Utility Model Application Publication No. 61-128005, Japanese Utility Model Application No. 1-6
As seen in Japanese Utility Model Application No. 8803, Japanese Utility Model Application Publication No. 1-142714, and Japanese Utility Model Application Publication No. 1-142715, it has been proposed to embed a reinforcing material in the outer layer portion of laminated lamina, for example.

In Japanese Utility Model Application Publication No. 1-128005, the reinforcing material is a plate-like material such as metal, and in Japanese Utility Model Application Publication No. 1-68803, the reinforcing material is a mesh-like material such as a reinforcing bar with a high Young's modulus, carbon fiber, aramid fiber, or ceramic. It is a thing, and the Utility Model Hei 1-
142714 and Utility Model Application Publication No. 1-142715, the reinforcing material is a long fiber of high-rigidity fiber such as carbon fiber, and both are intended to improve the bending rigidity of the laminated wood by embedding the reinforcing material. be.

Among these, Utility Model Application Publication No. 1-142714, Utility Model Application Publication No. 1-1
The long fibers used as the reinforcing material in Publication No. 42715 are made by twisting fibers with excellent tensile properties such as carbon fibers, glass fibers, steel fibers, aramid fibers, etc. to a predetermined thickness and cutting them to a predetermined length. As shown in FIG.
It is sandwiched between a, la and the lamina 1, 1 inside them and bonded.

A large number of these long fibers 6 are arranged linearly along the length of the lamina laminate 4 and substantially parallel to each other.

By the way, in order to manufacture the laminated timber 5 having the above structure, as shown in FIG. 8, only the intermediate lamina 1 is temporarily fixed by temporary adhesion or other appropriate means, and the upper and lower surfaces thereof are fixed with an appropriate jig 11. Long fiber 6 under a predetermined tension
The outermost layer lamina 1. is arranged above and below the long fibers 6.
All laminae la are placed and pressed from above and below.

1a and 1 are bonded together and at the same time the long fibers 6 are sandwiched between them.

[Problem to be solved by the invention]

However, in the conventional method for manufacturing laminated wood shown in FIGS. 7 and 8, in order to sandwich the long fibers 6 as reinforcing materials, the long fibers 6 are applied with a predetermined tension using an appropriate jig 11. A step of arranging it along the laminas 1 and 1a is required, which requires time and effort.

The purpose of the present invention is to solve the above-mentioned disadvantages of the conventional example, and to provide a method for manufacturing laminated wood made by laminating and bonding a plurality of wooden laminas, in which fibers as a reinforcing material are easily and quickly applied between the laminas by assembly work. An object of the present invention is to provide a method for manufacturing laminated wood that can be installed.

[Means to solve the problem]

In order to achieve the above-mentioned object, the present invention provides a method for manufacturing a laminated timber formed by laminating and bonding a plurality of wooden lamina, in which at least the outer layer of the laminated wooden lamina is bonded using a mixture of short fibers. Applying the adhesive to one lamina surface and pressing the lamina together, and mixing the short fibers with the adhesive are done by putting the short fibers and adhesive into a coating hopper with a built-in stirrer, and then applying the adhesive. The gist of this method is to discharge a mixture of short fibers and adhesive toward the lamina surface from the outlet of the hopper.

[Function] According to the present invention, short fibers are mixed with an adhesive, and simply by applying the adhesive containing the short fibers to the lamina surface, the lamina can be bonded to each other with the fibers sandwiched between them. .

When the lamina are bonded and fixed together, the short fibers are fixed with an adhesive, and therefore bending deformation is prevented by the short fibers, resulting in improved bending properties.

〔Example〕 Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a side view showing one embodiment of the method for manufacturing laminated wood according to the present invention, and shows a process corresponding to FIG. 4 showing the process of the conventional example.

As in the prior art, when the wooden lamina 1 is moved in the longitudinal direction, an adhesive application hopper 3 is installed above it, and this application hopper 3 has an agitator 8 inside.

Further, above the coating hopper 3, a short fiber hopper 9 and an adhesive bumper 10 were arranged side by side.

The short fibers 7 to be put into the short fiber hopper 9 include carbon fiber and steel fiber.
is put into the coating bomber 3.

Then, in the coating potper 3, these short fibers 7 and the adhesive 2 are mixed using a stirrer 8, and the adhesive 2 containing the short fibers 7 is directed from the outlet at the tip of the hopper 3 toward the surface of the lamina 1 that is being moved horizontally. Dispense.

In this way, each time the adhesive 2 containing the short fibers 7 is applied to one side of the lamina, the lamina 1 with the adhesive 2 is applied to another lamina 1 as shown in FIGS. 2 and 3. Just press it.

Note that the adhesive 2 containing the short fibers 7 may be placed on the same earthen floor of all the lamina 1, but at least on the outer layer portion of the wooden lamina 1 to be laminated, that is, the lamina laminate 4.
Laminae 1, 1 between or near the outermost lamina la, la and the inner lamina 1, 1
Between.

In the laminated timber 5 obtained in this way, the high-rigidity short fibers 7 with excellent tensile properties are included in the outer layer of the laminated lamina 4, that is, in the part that becomes the tensile side and tends to elongate when subjected to a bending load. Since the short fibers 7 are fixed and arranged with the adhesive 2, bending deformation is prevented by the short fibers 7, and therefore the bending properties are improved. Also, a product with high bending rigidity can be obtained.

[Effects of the invention] As described above, according to the method for manufacturing laminated wood of the present invention,
When laminating and bonding multiple wooden lamina to obtain laminated wood,
At least the provision of fibers as a reinforcing material between the outer layers of the wooden lamina to be laminated can be done by only slightly changing the conventional process of applying adhesive to the lamina surface, making it easy and convenient for assembly line work. Since the fibers as the reinforcing material can be quickly provided, the number of manufacturing steps is small and the cost is low.

[Brief explanation of drawings]

Fig. 1 is a side view showing one embodiment of the method for producing laminated wood according to the present invention, Fig. 2 is a perspective view of the main parts of the next step of the same as above, Fig. 3 is a front view of the same as above, and Figs. 4 to 6 7 is a perspective view of each process of a conventional example, FIG. 7 is a perspective view of another conventional example, and FIG. 8 is a side view of the first step of the same. 1, la, ... wooden lamina

Claims (2)

[Claims] (1) In a method for manufacturing laminated wood made by laminating and bonding a plurality of wooden lamina, at least the outer layer of the wooden lamina to be laminated is bonded by applying an adhesive mixed with short fibers to one lamina surface. A method for producing laminated wood characterized by coating the laminated wood on the lamina and crimping the lamina together. (2) Mixing of short fibers and adhesive is done by putting the short fibers and adhesive into a coating hopper with a built-in stirrer, and pouring the mixture of short fibers and adhesive onto the lamina surface from the outlet of this coating hopper. 2. The method for producing laminated wood according to claim 1, wherein the laminated wood is discharged toward the target direction.