JPS605462B2 - synthetic planar material - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a synthetic flat material in which the directionality of strength is minimized.

In general, synthetic planar materials have an intermediate member formed into a corrugated shape by bending a planar plate interposed between the upper and lower planar materials to provide strength, and to reduce weight, as shown in Figure 1. As shown in FIG. 2, the intermediate member 1' is formed in a wavy manner so that each of the ridge lines 2 and the valley bottom lines 2' become straight lines.

By the way, in the synthetic planar material 3 having the above configuration, the concave surface portion 4 and the convex surface portion 5 of the intermediate member 1 are divided by the adjacent ridge lines 2, trough lines 2', and so on, and the upper surface and the back surface correspond to each other oppositely. The hollow pillars 8 and 9 formed by the upper and lower planar members 6 and 7 are aligned in parallel, so that the composite planar member 3 has a directional strength.

In other words, the composite planar material 3 has the minimum resistance to a force that attempts to bend it parallel to the ridge line 2...the valley bottom line 2'... It has the highest resistance to orthogonal bending forces, and the difference is large.

This means that there are few joint surfaces between the ridge line 2... and the upper and lower flat members 6 and 7, and since the joint members are mostly linear, taking into consideration the possibility that the joint surfaces may come off due to external force,
The directionality of the strength becomes even more remarkable. As a result, when using the synthetic planar material 3, the directions of the ridge lines 2, trough lines 2', etc. must be determined depending on the magnitude and direction of the external force acting on the material, which is cumbersome to handle. In view of the above-mentioned drawbacks of the conventional synthetic flat material, this invention aims to improve this by dividing the plane by a number of wavy ridges and valleys in the same phase with each other, and the top side and the back side correspond to each other in opposite ways. This is a synthetic flat material in which the directionality of strength is minimized by forming an intermediate member with a concave surface part and a convex surface part, and embodiments of the present invention will be described below with reference to the drawings.

FIG. 2 shows a partially cutaway perspective view of the upper plane member 10 of this synthetic plane material, and in the figure, numerals 10 and 11 are an upper plane member and a lower plane member formed of thin plates. An appropriate material is selected from among synthetic resin materials, wood, paper materials, metal materials, and combinations of these materials.

The above-mentioned upper and lower planar members 10 and 11 may be continuous planes, or may be mesh-like planes with holes in a grid pattern. Reference numeral 12 denotes an intermediate member fixed between the upper and lower planar members 10 and 11, and there are ridge lines 13 on the top and back surfaces of which are in the same phase and whose respective wavelengths are approximately twice as large as the wavelength a. . . . and the valley bottom line 14 . The concave surface portion 15 and the convex surface portion 16 that share each other constitute this composite planar material.

Like the upper and lower planar members 10 and 11, the intermediate member 12 is made of an appropriate material depending on the specifications, and is molded by press processing or injection depending on the material, and may be a continuous surface. It may also be a mesh surface with holes in a grid pattern. In addition, the ridge line 13... and the valley bottom line 14...
The wavelength input and amplitude a of the surface waves formed by the material can be arbitrarily selected depending on the material and the purpose of use.

The composite planar material is used as the upper and lower planar members 10 and 11 and the intermediate member 1.
2, the concave portion 15 and the upper plane member 1
0, the convex surface portion 16, and the lower plane member 11, the hollow columns 17 and 18 meander along the ridge lines 13 and the valley lines 14 within the plane of the composite plane member.

Therefore, the section modulus of the composite planar material in all directions has a value that is not significantly different. As explained above, the present invention separates the upper plane member and the lower plane member at an appropriate distance and makes the intermediate member interposed between them wave, so that the ridgeline formed on the intermediate member can be used to form a line between the two planes. A synthetic planar material that is adhered to a material and has a hollow column formed by the intermediate member and the inner surface of each of the upper and lower planar materials in a meandering shape of the same shape,
Each hollow column formed by a concave surface portion, a convex surface portion, and upper and lower flat members meander in a manner that changes periodically. Therefore, the directivity of the strength against the shear force and buckling load acting on this synthetic planar material is smaller than that of conventional synthetic planar materials.

Therefore, there is no need to align the direction of the composite planar material depending on the type, magnitude, and direction of external force, making handling easier. Furthermore, since the ridges and valleys of the concave and convex parts of the intermediate member meander in parallel, their paths are longer than those of conventional synthetic flat materials, and the bonding strength between the upper and lower flat materials is increased, so the upper and lower sides It is possible to provide a synthetic planar material that has a strong bond between the planar material and the intermediate member and is durable. Next, as an example, an impact-resistant exterior body was made using this synthetic planar material. Considering the difference with known synthetic planar materials, in the case of known synthetic planar materials, the hollow columns are straight. Therefore, there is almost no resistance to the bending force parallel to this, so it is necessary to take into account the yield strength of the contents and form it so that the direction of the hollow column of the synthetic planar material does not coincide with the direction in which the content has a strong yield strength. It is easily understood from the above-mentioned reasons that the synthetic planar material of the present invention does not require this consideration, and it is clear that the synthetic planar material is extremely advantageous in this respect.

[Brief explanation of drawings]

FIG. 1 shows a perspective view of a conventional synthetic planar material. Fig. 2 shows an embodiment of the composite planar material according to the present invention, a perspective view showing the inside with the upper planar member partially cut away, and Fig. 3 a plan view of the same embodiment with the upper planar member removed. FIG. 4 is a side view of the same embodiment. 10... Upper plane material, 11.
...Lower plane material, 12...Intermediate member, 13.
...Ridge line, 14... Valley bottom line, 15... Concave surface portion, 16... Convex surface portion. Figure 1 Figure 2 Figure 3 Figure 4

Claims (1)

[Claims] 1. By separating the upper plane material and the lower plane material by an appropriate distance and undulating the intermediate member interposed between them, the ridge line formed on the intermediate member is welded to both of the plane materials, and the A synthetic planar material characterized in that a hollow column formed by an intermediate member and the inner surfaces of the upper and lower planar materials is formed in the same meandering shape.