JPH0345337A - Laminated sheet material - Google Patents

Abstract

PURPOSE:To make it possible to provide plates, materials of which are different from or same as each other, on both the front and rear sides of the material concerned, though it is light in weight, and prevent the secular change and the warpage and separation due to severe environments from occurring by a structure wherein the laminated sheet material concerned consists of sheet-like core material part, which is produced by providing reinforcing material on both the sides of core material, and sheet material, which is pasted onto both the sides of said core material part. CONSTITUTION:Core material part 3 is produced by pasting fiber reinforced plastic (FRP) reinforcing materials 7 and 8 on both the sides of aluminum honeycomb 6. The FRP is made of glass mat impregnated with resin and has resistance to bending in all directions. The core material part 3, which is produced by pasting said FRP reinforcing materials on both the upper and lower sides of the aluminum honeycomb 6, shows high rigidity though its weight is remarkably light. By integrating said core material part 3 with wooden sheet material 1 and synthetic resin sheet material 2, the warpage and twist due to the difference between the linear expansion coefficient of the front sheet material and that of the rear sheet material, secular change and the like can be effectively prevented from occurring.

Description

[Detailed Description of the Invention] [Industrial Application Field 1] The present invention relates to a board material that can be used for a wide range of purposes such as furniture, fittings, construction materials, ships, vehicle materials, etc. It is lighter and stronger than plate materials with a multi-layer structure, such as those known for its laminated structure, and can withstand harsh usage environments such as temperature changes and moisture, and is resistant to deformation such as warping and twisting. This relates to board materials.

[Prior Art] Plywood such as plywood and decorative boards made by pasting synthetic resin boards on plywood are widely known. When plywood such as plywood is used for temporary purposes such as concrete panels, or as base material for buildings, surface 4 deformability as a material is not a problem. However, for example, boards that are used as materials for high-end furniture, doors and other fittings used in places subject to temperature and humidity changes, and other harsh conditions that require flatness may deform over a short or long period of time. It is required to be strong and durable. Conventionally, such materials include, for example, metal materials or wood materials, which have the problem of being extremely heavy because thick feed is laminated in multiple layers.

In addition, materials with a structure in which the front plate and back plate are made of different materials, such as multi-layered materials such as wood and synthetic resin, wood and metal, etc., and plates with a structure in which plates made of different materials are layered and bonded together. Due to the difference in linear expansion coefficient between the two, the plate warps and twists due to expansion and contraction due to temperature changes. In addition, the adhesion surface of different materials has elongation,
There is a problem that stress due to shrinkage always acts, and the adhesive surface tends to peel off. In addition, in the case of structures made by laminating wood and non-wood materials such as synthetic resin, wood swells when wet and contracts when dry, but non-wood materials do not swell or contract due to moisture absorption or drying. In environments with varying humidity, the tendency for deformation and peeling becomes even more pronounced.

In this way, in order to obtain a material that can withstand deformation over a long period of time by combining similar and different types of materials, there is a problem in that it becomes extremely heavy, and it also needs to be able to withstand harsh conditions such as repeated wetting and drying. However, there are many more problems with conventional techniques, and it has been difficult to obtain materials that are lightweight but do not warp or peel over a long period of time.

The present invention solves these problems and provides a lightweight plate material that allows plates made of different materials or the same type to be placed on the front and back sides, and that does not warp or peel even when placed in harsh environments or over time. is intended to do.

[Means for Solving the Problems] A means for achieving the above-mentioned object is, as stated in the claims, a core material having a plate-like shape with reinforcing materials provided on both sides of the core material. , a laminated plate material formed by pasting plate materials on both sides of the core material portion, and a core material portion formed by combining directional materials in substantially the same plane and in different directions, the core material It has a plate material characterized by having plate materials attached to both sides of the part, and a core part equipped with a reinforcing material formed by introducing directional materials in different directions on substantially the same plane. , is a plate material characterized in that plate materials are attached to both surfaces of the core portion.

The above structure forms a relatively lightweight core material with excellent rigidity in the center, and the rigidity of the core material allows the elongation, contraction, and swelling of the same or different materials attached to both the front and back surfaces. This prevents warping and twisting caused by

The present invention will be described in detail below based on examples.

[Embodiment 1] FIG. 1 is a perspective view showing a plate material according to a first embodiment of the present invention, and FIG. 2 is a diagram showing the structure of a core portion used in that embodiment.

In this example, a wooden plate 1 is attached to one side of the core portion 3, and a synthetic resin plate 2 is attached to the other side.

As shown in FIG. 2, the core part 3 is made by pasting reinforcing materials 7 and 8 of fiber reinforced plastic (hereinafter referred to as FRP) on both sides of an aluminum/S nicomb 6. The P R and P used in this example are gelatin mats impregnated with resin, and have resistance to bending in all directions. 3 indicates strong rigidity while being extremely lightweight.

By integrating this core part 3 with the wooden board 1 and the synthetic resin board 2, the difference in linear expansion coefficient between the front and back boards,
It is possible to effectively prevent warping and twisting due to changes over time. The core material used in the present invention is not limited to honeycomb structural materials made of various materials such as aluminum □ honeycomb, and any other materials such as wood, synthetic resin, plastic foam, etc. can be used.

[Example 2] Figures 3 and 4 are perspective views showing an example of a board using a core made of a pair of wooden boards as the core part, and Figure 4 shows how the boards in Figure 3 are attached. It is a perspective view which shows each front board material and a core material.

In Figures 3 and 4, 21 is a wooden board, 22 is a synthetic resin board, 23 is a core part, 24 and 25 are core parts with wood grain in the vertical direction, and 26 and 27 are core parts with wood grain in the horizontal direction. be.

In this example, as shown in FIG. 4, the core portion 23 is formed of four wooden cores having grains with different directions. Each core material is assembled on the same plane so that the direction of the wood grain is parallel to each side of the board. Surface board material 2
The grain direction of 1 is facing the long plane of the board, and the core material 24
The direction of the grain of the core material 25 is almost parallel to this,
6.27 It intersects at right angles to the grain direction.

A wooden plate 21 is attached to one side of such a core material, and a synthetic resin plate 22 is attached to the other side to form the plate shown in FIG. 3.

This configuration is effective in preventing warping in the width direction of the board because the direction of the grain of the core material 26.27 is perpendicular to the direction of the grain of the wooden board. are arranged in the length direction of the board, which effectively prevents the board from warping in the length direction.

[Example 3] Fig. 5 and Fig. 6 are examples in which a reinforcing material is further provided on a wooden core material to form a core material portion in order to provide rigidity to the core material.

The core material of the core material portion 33 is made of wooden core materials 34, 37, 37, 34, 37, 37, 34, 34, 37, 34, 34, 37, 34, 34, 37, 34, 34, 37, 34, 37, 34, 34, 37, 34, 34, 37, 34, 34, 37, 34, 37, 34, 37, 37, 34, 37, 37, 34, 37, 37, 34, 37, 34, 37, 37, 34, 37, 37, 34, 37, 37, 37, 34, 37, 37, 37, 37, 34, 37, would be formed.
It is formed by combining 35 and 36. A core portion 33 is formed by pasting thin FRP plates on both upper and lower surfaces of the core. When the core material and the reinforcing material are combined as in this example, the core material does not necessarily need to be a combination of directional materials, and may be a single simple plate. In this example, the FRP used for the reinforcing material is a combination of FRP thin plates with fibers aligned in one direction as shown in Figure 6, and the reinforcing material 38.41 is assembled so that the fiber directions are perpendicular to each other on the same plane.
．． It is a combination of 39.40 and 42.45.43.44. In addition, as a reinforcing material, cross FRP with strength biased to one side is used.

It may also be a cross FRP with uniform strength in all directions. The core member 33 formed in this way has sufficient rigidity in all directions, and is made by pasting boards made of different materials such as wooden boards and synthetic resin boards on both sides. Provides strong resistance to deformation such as bending and twisting.

[Example 41] FIGS. 7 and 8 are examples in which an aluminum honeycomb plate is used as the core material and wood is used as the reinforcing material to construct the core material part.

On both sides of the aluminum honeycomb board 54, reinforcing materials made of thin wood plates 55, 57, 56, and 58 whose grain directions are orthogonal to each other, and reinforcing materials made of thin plates 59, 61, 60, and 62 are pasted to form a core material. A portion 53 is formed. Although the aluminum honeycomb 54 is extremely lightweight, it lacks rigidity; however, by bonding reinforcing materials made of oriented wood on both sides, it is possible to obtain a core portion 53 with sufficient rigidity. A wooden board 5 is placed on one side of the section 53.
1 and the synthetic resin plate 52 attached to the other side are resistant to deformation such as warping and twisting.

[Example 5] FIGS. 9 and 10 are examples in which the structure is almost the same as that of Example 4, but an FRP thin plate with the fibers aligned in the same direction is used as a reinforcing material instead of a wooden thin plate.

Reference numbers 61 to 72 correspond to reference numbers 51 to 62 in FIG. 8, respectively. In this example as well, the fibers of the adjacent reinforcing materials are combined so that their fiber directions are perpendicular to each other.
Forms a core material with excellent rigidity and has excellent water resistance.
It has an excellent effect on preventing warping in the width and length directions.

[Example 6] Figures 11 and 12 show examples in which a different core material is used, in which a wooden core material has parallel wood grains on each side of a quadrilateral and has wood grains that are orthogonal to each other. A core part 93 is formed by combining 94, 96, 95, 97 and a wooden core 98, 99, 100° 101 having grains parallel to the diagonal of the quadrilateral on the same plane. A wooden board 91 and a synthetic resin board 92 are attached to both sides of this core part 93 to form a board.

This board also has the advantage of being resistant to warping in all directions.

[Example 7] Figures 13 to 14 show an example in which a core part was formed by combining an aluminum honeycomb plate and an FRP reinforcing material as in Example 5, but the direction of the fibers of the FRP reinforcing material was changed from that in the example. Different from 5, reinforcing material 1. has fibers aligned in a direction parallel to the diagonal of the quadrilateral. This is an example in which the core member 113 is constructed by combining 4.115.116.117 and 118.119.120.121 and pasting this on both sides of the aluminum honeycomb 123. This example also has the same effect as Example 5.

[Embodiment 8] FIGS. 15 to 16 are examples in which the structure of the core portion is more complicated. The core portion 133 has a core material in which a paper honeycomb board 138 is provided in the center, and wooden frame materials 134, 137, 135, and 136 having parallel wood grains on the four sides are combined around the core material. The reinforcement material has directional F with parallel fibers on all four sides.
RP l 40.143.141.142 in combination, and similar directional FRP 145.148.146
．． 147, and these are attached to both sides of the core material to form the core material part 133. Incorporating a vapor honeycomb board makes it possible to reduce weight, and the combination of a directional core material and a directional reinforcing material makes it resistant to deformation in all directions. In addition, the wooden frame material makes it convenient for attaching hinges and doorknobs, for example when used as door material.

[Example 9] FIGS. 17 to 18 are examples in which an aluminum honeycomb plate is used as the core material 204 as in Example 5, and FRP reinforcing materials are provided on both sides to form the core material part 203. FR,
P reinforcement 205.206.207 and 209.210.
211 differs from Example 5 in that adjacent portions are not abutted against each other in a diagonal manner, but are abutted against each other perpendicularly. A plate having such a core part is also used in Example 5.
The same effect can be obtained.

[Example 10] FIGS. 19 to 20 have the same configuration as Example 8 in FIG. 16, but the relationship between the core part 223 and the frame shrine 225 is
This shows an example different from the figure.

In this example, the entire core part 223 is made smaller than the temporary shape, and a frame member 225 is provided on the outside thereof.

2. Since the reinforcing material of the core material does not appear at the edge of the board, there are advantages such as preventing the user from being injured by the fibers of the reinforcing material.

[Effects of the Invention] According to the present invention, as explained in detail in the above embodiments, it is possible to obtain a plate with a robust laminated structure without deformation such as warping or peeling even during long-term use. It becomes possible. Moreover, according to the present invention, it is possible to obtain a plate material using different materials on the front and back sides, and the laminated structure plate made of different materials obtained in this way is lightweight and thin, and can be used indoors depending on the purpose. It has the effect that it can be used freely regardless of the purpose as a material used under harsh outdoor conditions, and can be used even when the usage conditions are different between the front and back sides.

Even when the present invention is applied to a board in which homogeneous materials are laminated, the same effects as described above can be obtained, such as the ability to prevent deformations such as warpage and twisting of the board caused by usage conditions and aging due to the function of the core material. be able to.

[Brief explanation of drawings]

1 to 20 are diagrams showing embodiments of the present invention. 1.21.31.51.61.91.111.201.
221... Wooden board, 2.22.32.
52.62.92.112.132.202.222・
...Synthetic resin plate material, 3.23.33.53.6
3.93.113.133.203.223... Core material part

Claims (1)

[Claims] 1. A core material having a plate-like shape with reinforcing materials provided on both sides of the core material,
A laminated board material 2 made of plate materials pasted on both sides of the core part, has a core part formed by combining directional materials in different directions on substantially the same plane, and has a core part formed by combining directional materials in different directions on the same plane, Laminated board material made by pasting board materials on the sides. 3. A laminated plate material having a core portion including a reinforcing material formed by combining directional materials in different directions on substantially the same plane, and having plate materials adhered to both sides of the core portion.