JPH03146307A - Composite laminated wood and its manufacture - Google Patents

Abstract

PURPOSE:To improve the productivity, while the gluing strength between mutual members is heightened and the positioning of mutual members is carried out easily and surely in manufacture by gluing integrally the intermediate members composed of synthetic resin or synthetic rubber to the platelike members on both sides with depressions and protrusions. CONSTITUTION:Composite laminated wood M1 is composed by two wooden platelike members 1a having rectangular cross section and the same width and two intermediate members 2a made of hard synthetic resin-foam intervening between the plate members. On the opposite surfaces of both plate members 1a, the grooves 3a having inverse trapezoids are respectively engraved in parallel longitudinally at the two positions of both sides. On the upper and lower surfaces of both intermediate members 2a, three ridges 3b having the cross sectional trapezoids corresponding to the grooves 3a are longitudinally formed in parallel respectively. These ridges 3b are set in the state of such a size, shape and arrangement interval that they may be inserted sufficiently into the corresponding grooves 3a. On each contacting surface, three pairs of the grooves 3a and the ridges 3b are integrally formed through an adhesive as if palms are joined together. Hollow part 4 is formed inside with both plate members 1a and the intermediate members 2a.

Description

Detailed Description of the Invention (Industrial Field of Application) The present invention is a composite laminated wood material useful for structural members of fittings and furniture such as wooden gates and doors, building materials for landscaping and decorative banners, etc. Concerning the method of making oysters.

(Prior art and its problems) Composite laminated wood is generally made by gluing together multiple pieces of wood, such as ground wood and small square wood, with their fiber directions parallel to each other and gluing them together. It contributes to the effective use of wood resources because small-diameter logs and derived materials for lumber and woodworking can be used, and because the raw material is small in diameter, wood drying and chemical treatment can be carried out efficiently, and stress relief during drying is easy. There are also advantages such as being able to adjust the strength and dispersing the defects of raw materials by combining them. In particular, composite laminated wood with a hollow cross section has the advantage that it is lightweight and has a large diameter, and the inside can be used for attaching electrical wiring and various metal fittings.

However, because conventional composite laminated materials generally have members bonded together on flat surfaces and are rigid as a whole, they have the disadvantage of being susceptible to glabellar displacement at joints and being weak against twisting. When assembling, it takes a lot of effort to position the parts relative to each other, resulting in poor productivity.
There is a problem in that defective products are likely to be produced due to misalignment and the yield is low.

(Means for Solving the Problems) In view of the above-mentioned circumstances, the present invention absorbs the glabellar displacement at the joint, is strong against twisting (and can easily and reliably position the members relative to each other), and can be used in production. The aim is to provide composite laminated timber with excellent properties.

As a means to achieve the above object, claim (1) of the present invention
Composite laminated timber consists of multiple wood planks arranged parallel to each other with their surfaces facing each other, and an intermediate material made of synthetic resin or synthetic rubber interposed between these planks in the longitudinal direction. A plurality of grooves and grooves are formed along the longitudinal direction on each of the contact surfaces of the intermediate material and the plate-like materials on both sides, and the intermediate material and the plate-like materials on both sides fit together over the unevenness. A structure is adopted in which the parts are joined and integrated by adhesion.

In addition, in the composite laminated timber according to claim (2) of the present invention, in the structure according to claim (1), a plurality of wooden intermediate materials are interposed between the opposing wooden planks, and these planar materials and the intermediate A hollow part is formed between the material and the material.

Similarly, in the composite laminated timber according to claim (3) of the present invention, in the configuration according to claim (1) or (2), the opposing wooden planks are set to have the same width, and at least one side of these planks is set to have the same width. A groove whose bottom surface is the side surface of the wooden intermediate material is formed between the side edges of the groove.

On the other hand, in the method for manufacturing a composite laminated timber according to the present invention, a joint surface portion having a plurality of unevenness along the longitudinal direction is formed at at least one place of a wooden plate-like material whose fiber direction is along the longitudinal direction, and a synthetic resin Alternatively, a plurality of grooves corresponding to the above-mentioned unevenness are formed on two parallel surfaces of an intermediate material made of synthetic rubber, and each of the uneven surfaces of the intermediate material is fitted onto the joint surface of the plate-like material through an adhesive. By doing so, a plurality of plate-shaped materials arranged in parallel with their plate surfaces facing each other and the intermediate material interposed between these plate-shaped bodies are joined and integrated.

(Function) Since the plate-like material and the intermediate material are joined together by joining each other through the adhesive on their uneven surfaces, the bonding area of the joint is significantly increased compared to when joining flat surfaces together. As a result, large joint strength is obtained, and interlayer displacement at the joint is absorbed by the material elasticity of the intermediate material, resulting in great torsion resistance even in laminated structures with a small joint width, such as those with a hollow cross section. . Also, when joining assemblies,
Positioning is automatically performed simply by fitting the above-mentioned projections and depressions together.

Therefore, as the intermediate material, polymer materials having a certain degree of elasticity such as extruded products of soft or semi-hard synthetic resins, foams of semi-hard or hard synthetic resins, and soft or hard synthetic rubbers are suitable.

In particular, the above-mentioned foam can also be expected to act as a heat insulating material.

On the other hand, in addition to veneers such as sawn wood, L.
Laminated materials such as VL materials can also be used.

In addition, when the opposing wooden planks are set to have the same width, grooves are formed along the longitudinal direction by positioning the intermediate material deeper inward than the side edges of both planks. . This grooved composite glulam can be connected to other members or composite glulam with corresponding mortises or grooves by tongue and groove joints.

(Example) Embodiments of the present invention will be described below based on the drawings.

The composite laminated timber M1 shown in Figs. 1 and 2 is an intermediate structure consisting of two wooden planks 1a and la with a rectangular cross section and the same width, and two hard synthetic resin foams interposed between them. It is composed of the material 2a. Note that the fiber direction of the plate-shaped materials 1a is along the longitudinal direction (the same is true for all composite laminated materials to be described later).

Therefore, on the opposing surfaces of both plate materials 1a and la, respectively,
Three grooves 3a each having an inverted trapezoid cross section are carved parallel to each other along the longitudinal direction at two locations on both sides. on the other hand,
Three protruding stripes 3b each having a trapezoidal cross-section and corresponding to the grooved stripes 3a are formed parallel to each other along the longitudinal direction on two parallel surfaces, that is, on the upper and lower surfaces of the rain intermediate members 2a, 2a.

Each of the protrusions 3b is set to a size, shape, and arrangement interval that allows it to be completely fitted into the corresponding grooved line 3a, and the composite laminated timber Ml is made up of the plate-shaped materials 1a, la and the intermediate material 2a.

2a and three pairs of concave strips 3a and convex strips 3b come together on each contact surface, and are made by joining and integrating them with an adhesive, and both plate-like materials 1a and la are attached on the inside. A rectangular hollow portion 4 is formed surrounded by the intermediate members 2a, 2a, and the side surfaces of both plate-shaped members 1a, la and the intermediate member 2a are flush with each other on both sides.

The composite laminated timber M2 shown in FIG. 3 consists of two wood plate-like materials 1b and lb with the same width and a rectangular cross section in which the grooves 3a on one side are located slightly toward the center, and two intermediate materials 2a similar to those described above. , 2a, and has a hollow part 4 like the composite laminated timber Ml, and a groove 5 whose bottom is the side surface of the intermediate material 1a between the side edges of both plate-like materials 2b and 2b on one side. is formed. Such composite laminated timber M2 can be connected to other members having a tenon that fits into the groove 5 by tongue and groove joints, and can also be connected to similar composite laminated timber M2 or other members by using tongue and groove joints. It can also be connected to other members having grooves.

The composite laminated timber M3 shown in Fig. 4 is a wide wood plate having two groups of convex strips 3b on both sides between opposingly arranged wooden plate-like materials lc, lc having two groups of concave strips 3a near the center. Grooves 5 are provided on both sides by interposing only one intermediate member 2b made of a flat hard synthetic resin foam. Such a composite laminated timber M3 can be connected to other members by tongue and groove joints using the grooves 5 on both sides. Therefore,
For example, by connecting a plurality of composite laminated materials M3 and connecting the aforementioned composite laminated materials M2 to both ends thereof, a face plate having an arbitrary width can be produced.

The composite laminated timber M4 shown in FIG. 5 uses a plate-like material 1d having a group of grooves 3a on both sides of both plate surfaces, and the plate-like materials 1a, 1a are arranged in parallel so as to face each other on both surfaces. Intermediate members 2a, 2a are interposed between the opposing faces, and they are joined and integrated by joining together using the same adhesive as described above to form a prismatic shape having two hollow portions 4.4, for example. Can be used as pillar material. In the same way, it is also possible to make a composite laminated timber in which four or more plate-shaped materials are arranged in parallel, and composite laminated timber M2. Similar to M3, if grooves 5 and tenons 6 are provided, a strong assembly with multiple tongue and groove joints can be manufactured.

On the other hand, the above-mentioned composite laminated timber M1 to M4 have one or two intermediate members interposed between opposing plate-shaped bodies, but for example, as in the composite laminated timber M5 shown in Fig. 6, a wide plate-shaped Material 1
e may be used to interpose three or more intermediate members 2a between the opposing members.

Note that this composite laminated timber M5 has a hollow part 4 in the center with four intermediate members 2a interposed therebetween, so by cutting it along the imaginary line in the center with a saw 6, the groove shown in FIG. Two pieces of composite laminated wood M2 having a particle size of 5 are obtained. Therefore, this method of cutting wide composite laminated timber has the advantage that the number of man-hours can be significantly reduced compared to the method of manufacturing narrow composite laminated timber one by one.

By the way, the above-mentioned composite laminated materials Ml, M2. By providing a hollow part 4 such as M4, it is possible to realize a product that is lightweight and has a large diameter, and the hollow part 4 can be used to conduct electrical wiring for house automation etc., or when used for doors etc. Mounting fittings, interlocking fittings, locking devices, etc. can be easily incorporated into the device.

In addition, in the composite laminated material of the present invention, a decorative board may be attached to the side surface or, if necessary, the entire circumferential surface in order to prevent the joint portion formed by the intermediate material from being exposed to the outside. In addition, for example, three plate-shaped materials If, If, like the composite laminated timber M6 shown in FIG.

1g and four intermediate members 2a... are joined and integrated, and the side plate 7 with the tenon 7a is fitted and integrated via adhesive using the grooves 5 formed on both sides thereof. , composite laminated wood with hidden joints by intermediate material may also be used.

Note that the cross-sectional shape of the uneven strips 3a and 3b is the trapezoid (
The convex side is not limited to an inverted trapezoid), but can be changed to a U-shape, triangle, etc., but the shape must be such that the base width of the convex side is larger than the top width in order to facilitate gassho mating. is desired. In addition, the depth or height of these uneven stripes 3a, 3b,
The number and arrangement interval can be set arbitrarily. Furthermore, it is possible to reverse the relationship between the unevenness of the plate-shaped material and the intermediate material from the example shown, but in this case, it is necessary to increase the cutting area to form the protrusions on the plate-shaped material side. There's a lot of waste.

Application examples in which the composite laminated wood of the present invention is used as a component of a gate are shown below with reference to FIGS. 8(A) to 8(C).

This gate 9 has an upper frame 10a, a lower frame 11b, and left and right side frames 10.
Edge material 1 is placed on the inner edges of the four peripheries of the rectangular peripheral frame lO consisting of c and 10c.
1 is attached, and the edge frame 11,
[2...-] are installed in parallel through 11, and the whole structure is in the form of a lattice. The upper frame 10a and the left and right side frames 10C910c are made of composite laminated wood M2 as shown in FIG. 3 having grooves 5 on one side, and the lower frame 11
Two plate materials 1h are placed in b; Three intermediate materials 2 are placed between 1b.
Composite laminated wood M7 with a similar groove 5 on one side with a
is used, while a material having a T-shaped cross section is used as the edge material 11, and each composite laminated timber M2M7 and edge material 11
are connected to the groove 5 of the former by a tongue-and-groove joint method in which the tenon part 11a of the latter is fitted and adhered to the groove 5 of the former, and the glulam M2. A decorative joint 13 is appropriately formed between M7 and the edge material 11.

The composite laminated timber of the present invention can be used not only as frame materials for fittings such as gates as described above, but also as face plates for doors, building materials such as pillars, beams, flooring materials, wall materials, and furniture components. Suitable for various purposes.

(Effects unique to the invention) The composite laminated timber of the present invention has high bonding strength between members,
In addition, interlayer displacement at the joint is absorbed by the intermediate material, so even joints with a small joint width, such as those with hollow parts, have extremely high resistance to twisting.Moreover, mutual positioning of parts can be easily and reliably performed during manufacturing, resulting in a high It has the advantage of high yield and productivity. In addition, since the intermediate material of this composite laminated timber is made of synthetic resin or synthetic rubber and is molded, it is possible to always use parts of consistent quality, and there are no errors in the shape, size, arrangement, etc. of unevenness. There is no risk of bonding defects, and the yield is further improved.

Therefore, the composite laminated material of claim (2) makes the most of the above advantages, has a large diameter and is particularly lightweight, and uses the hollow part to accommodate electrical wiring, various metal fittings, and devices. It has the advantage that it can be used for

The composite laminated timber according to claim (3) can be connected to similar composite laminated timber or other members by the tongue and groove joint method used in the Japanese language, and can be used for various assemblies such as frames and face plates. Can be widely used as a component.

Further, according to the method of the present invention as claimed in claim (4), it is easy to rate the constituent members and level the process, and as claimed in claim (2),
, The composite laminated timber of the present invention with various structures including the one in (3) can be easily manufactured by simply changing the combination of parts by the same procedure, and the mass production and manufacturing automation of composite laminated timber and the resulting manufacturing costs can be achieved. It is possible to reduce the

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view of a composite laminated timber according to one embodiment of the present invention, Fig. 2 is a sectional view of the same composite laminated timber, and Figures 3 to 7 are all related to other embodiments of the present invention. A cross-sectional view of such composite laminated wood, No. 8 [m (A) is a front view of a gate using the composite laminated wood of the present invention, No. 11 & (B) is a cross-sectional view taken along line B-B of the same figure (A). The figure (C) is a cross-sectional view of c-cvA in the figure (A). M1 to M7... Composite laminated wood, 1 a-1h... Wooden plate material, 2a, 2b... Intermediate material, 3a... Concave strip, 3
b...Convex strip, 4...Hollow part, 5...Groove.

Claims (4)

[Claims] (1) Consisting of a plurality of wooden plate-like materials arranged in parallel with their plate surfaces facing each other, and an intermediate material made of synthetic resin or synthetic rubber interposed along the longitudinal direction between these plate-like materials, A plurality of protrusions and depressions are formed along the longitudinal direction on each contacting surface of the intermediate material and the plate-like materials on both sides thereof, and the intermediate material and the plate-like materials on both sides fit the above-mentioned protrusions and recesses into each other. Composite laminated wood that is integrated by bonding. (2) The composite laminated timber according to claim (1), wherein a plurality of intermediate members are interposed between opposing wooden plate materials, and a hollow portion is formed between these plate materials and the intermediate materials. (3) The opposing wooden planks are set to have the same width, and a groove whose bottom surface is the side surface of the intermediate material is formed between at least one side edge of these planks. (2)
Composite laminated timber as described. (4) A joint surface portion having a plurality of unevenness along the longitudinal direction is formed in at least one place of the wooden plate-like material whose fiber direction is along the longitudinal direction, and parallel two of the intermediate material made of synthetic resin or synthetic rubber are formed. By forming a plurality of grooves corresponding to the above-mentioned unevenness on the surface, and fitting the uneven surfaces of the intermediate material into the joining surfaces of the plate-like material through adhesive, the plate surfaces are made to face each other. 1. A method for manufacturing composite laminated timber, which comprises joining and integrating a plurality of parallel-arranged plate-like materials and the intermediate material interposed between these plate-like materials.