JPS6125832Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to synthetic resin game boards such as Go boards, Shogi boards, Chess boards, Sugoroku boards, etc. In particular, the hitting sounds of pieces and Go stones are almost the same as those made of natural wood. The aim is to provide a disc with good sound quality.

Go, shogi boards, etc. are made of natural wood (mainly oak wood, katsura wood, etc.)
These are common, but they are very expensive.
It is difficult to obtain as a mere hobby or entertainment tool. Therefore, an attempt has been made to provide a Go, Shogi, etc. board made of synthetic resin in place of the natural wood. In this case, the appearance, such as surface hardness and feel, can be made to resemble natural wood to some extent by changing the synthetic resin material, foaming ratio, printing method, etc., but the hitting sound of the pieces and Go stones is clearly different from that of natural wood. This was different, and this was one of the obstacles to increasing the commercial value of synthetic resin discs. In particular, people like shogi boards and Go boards that have a good sound quality, so when commercializing synthetic resin boards, it is important not only to look good but also to make the sound quality similar to and better than natural wood. It is.

The present invention was developed based on various researches in view of the above, and it was decided that the surface would have an appropriate hardness comparable to that of natural wood, and the sound quality when hitting pieces or Go stones would be extremely good. be. In other words, the present invention forms the exterior with a low-expansion, high-density synthetic resin foam with an expansion ratio of 1.2 to 5.0 times, and uses a synthetic resin foam with a higher expansion ratio and low density of 2.0 to 15 times as the backing material. It is characterized by having a disc body made up of.

Next, one embodiment of the present invention will be described based on the drawings. The figure shows a shogi board with legs, where 1 is a board whose top surface is divided into vertical and horizontal grids, and 2 are legs. However, the foaming ratio of board 1 is 1.2~
An exterior material 3 made of a synthetic resin foam with a low foaming density of 5.0 times, preferably 1.5 to 3.0 times, and a certain degree of hardness, and a foaming ratio higher than that of the exterior material 3, a low density, and a foaming ratio of 2.0 to 15. A backing material 4 made of a synthetic resin foam whose size is 3.0 to 6.0 times larger is bonded to the backing material 4 by adhesive means or the like. If the foaming ratio of the foam used for the exterior material 3 is outside the range, the surface hardness and feel similar to natural wood will not be obtained, and the foaming ratio of the foam used for the backing material 4 will not be within the range. If the magnification is outside the range, the hitting sound of the pieces and Go stones will be considerably different from that of natural wood, which is not desirable.

In the illustrated example, the configuration of the disk body 1 made of the above-mentioned exterior material 3 and backing material 4 includes a thick plate-like backing material 4 and a hollow rectangular disk-shaped inner body 5 corresponding to the shape of the disk body. Exterior materials 3, 3,
3 and 3 are joined by adhesive means or the like so that the inclined end surfaces of approximately 45° are abutted against each other, and the board 1 is
An exterior material 3 corresponding to the upper surface is bonded to the upper surface of the inner body 5 and the upper end surfaces of the four exterior materials 3 by adhesive means. Although it is possible to attach an exterior material to the lower surface of the board 1, in practice, as described above,
It is sufficient to provide the exterior material 3 on the top surface and the four circumferential sides. The configuration of the board 1 is not limited to the above embodiments, and various implementations are possible. For example, it may be made of a material in which the exterior material 3 and the backing material 4 are laminated in advance, and at least the top surface and the four circumferential sides are made of the exterior material. It is also possible to form a bonded structure so that it is covered, or the inner body 5 made of the backing material 4 described above can be integrally molded. Further, the inner body 5 made of the backing material 4 may be internally solid, but from the viewpoint of sound absorption, acoustic effect, weight reduction, and material saving, it is preferable to form the inner body 5 to be internally hollow as shown in the drawing. Furthermore, if the disc body 1 is relatively thin, only the upper surface thereof may be formed of the exterior material 3 and the lower part thereof may be formed of the backing material.

The above-mentioned exterior material 3 and backing material 4 include styrene resins such as polystyrene and copolymers mainly composed of styrene, olefin resins such as polypropylene and copolymers mainly composed of polyethylene and olefins, and olefin resins such as copolymers mainly composed of polypropylene, polyethylene, and olefins, and olefin resins such as copolymers mainly composed of polypropylene and polyethylene. copolymer,
Foams of polyvinyl chloride resin, polyurethane resin, and other synthetic resins are used, and foams of hard synthetic resins such as styrene resins are particularly preferably used as the exterior material 3 that requires a certain degree of hardness. Out of the exterior material 3 and the backing material 4, at least the exterior material 3 is made of a thermoplastic resin foam such as the above-mentioned styrene resin, and has a large number of resin foam strips with a high density on the surface and a low density on the inside. Preferably, foam plates are used which have a dense skin layer formed by converging parallel arrays and fusing adjacent strips together. In this case, the high-density parts, which are the fused parts of the resin foam strips, have a wood grain pattern, and the appearance is almost the same as that of natural wood. Of course, ordinary synthetic resin foam may be used as the exterior material 3 and the backing material 4, but in that case, it is recommended to print a wood grain pattern or other pattern on the surface of the exterior material 3, which corresponds to the top and side surfaces of the board 1. good. The thickness of the exterior material 3 and the backing material 4 can be appropriately determined depending on the material, foaming ratio, thickness of the board 1, etc., but as an example in the case of a shogi board as shown in the figure, the thickness of the exterior material 3 is 5.
~10mm, and the thickness of the backing material 4 is 20~30mm.

In the illustrated embodiment, the legs 2 protruding from the lower surface of the board 1 have a hollow polygonal cross-section and are made of a material in which an exterior material 3 and a backing material 4 are laminated together as in the board 1 described above. Composed of joints. The legs 2 may be made of synthetic resin foam or may be made of non-foamed synthetic resin.

In the figure, reference numeral 6 denotes a storage box for game equipment such as pieces, which is provided in an appropriate position on the side of the board 1 and can be freely drawn out;
1 is a base plate for a piece stand that can be freely drawn out at 180° opposing positions on the left and right sides of the board 1. In particular, the base plates 7, 7 are provided in the case of a shogi board. It is preferable that the storage box 6 and the front plates 6a, 7a, 7a of the base plates 7, 7, which are part of the side surfaces of the board 1, are made of the same material as the exterior material 3 of the board 1. Further, the front plates 6a and 7a, 7a can be formed to have a width slightly wider left and right or up and down than the width of the drawer opening of the storage box 6 and the base plates 7, 7.
Reference numeral 8 denotes a non-slip cushioning material such as rubber attached to the lower surface of the leg 2.

As mentioned above, this invention has a foaming ratio of 1.2 to 5.0.
Exterior material 3 made of synthetic resin foam with moderate hardness and low foaming ratio and high density, and backing material made of synthetic resin foam with a higher expansion ratio and lower density than the exterior material 3 and 2.0 to 15 times foaming. 4 are laminated together to form the board 1. Therefore, although the entire board is made of synthetic resin foam, the surface of the board 1 is made of the relatively dense exterior material with a low foaming ratio. 3, it can have appropriate hardness and is difficult to damage, and there is no risk of cracking or warping due to drying, and the difference in foaming ratio between the exterior material 3 and the backing material 4, which have a two-layer structure. In other words, the difference in density greatly improves the sound quality when hitting pieces or Go stones.

In other words, a low-expanding, high-density synthetic resin foam with an expansion ratio of 1.2 to 5.0 times as described above can exhibit a moderate hardness and feel similar to natural wood on the surface. High-density foam usually has almost no sound absorption properties that are unique to wood, and the hitting sounds from pieces and Go stones are high, but it is not thick enough to be satisfactory in terms of sound quality, but in the case of the present invention,
Even if the exterior material 3 is a relatively low-expansion, high-density synthetic resin foam with a hardness and feel similar to natural wood, and is not very thick, it has a higher expansion ratio and a lower density than the above-mentioned synthetic resin foam, and has a low density and a cellular space. Since a synthetic resin foam with a high rate of sound absorption and excellent sound absorption properties is bonded as the backing material 4, the sound of the pieces and Go stones hitting the exterior material 3 is moderately absorbed by the backing material 4, making the sound quality slightly thicker and lower. Therefore, it has the same hardness and feel as natural wood, and can also produce an extremely good hitting sound similar to natural wood.

In addition, at least when the exterior material 3 is made of a synthetic wood board made by gathering and fusing a large number of resin-foamed strips, it is possible to have not only the hardness and sound quality described above but also the appearance similar to natural wood. Good quality and can further increase product value.

Furthermore, in the present invention, as the board 1 is made of synthetic resin foam as described above, it is much lighter and easier to carry than a wooden board, and is particularly advantageous for the exterior material 3 and its foaming ratio. The two-layer structure with the backing material 4 maintains the hardness of the surface, further reduces weight and saves materials, and can be provided at low cost. Furthermore, it has excellent water resistance and corrosion resistance, and can be wiped with a wet cloth, making it easy to remove dirt.

As described above, the present invention can be easily obtained and used by anyone as a Go/Shogi board for hobbies or entertainment in place of conventional natural wooden ones.

[Brief explanation of the drawing]

The figures show an embodiment of the present invention, and FIG. 1 is a partially cutaway perspective view, FIG. Figure 4 is a cross-sectional view taken along the line taken from the front figure. 1...Disc body, 3...Exterior material, 4...Backing material.

Claims (1)

[Claims for Utility Model Registration] 1. Composite of an exterior material made of a low-expanded, high-density synthetic resin foam with an expansion ratio of 1.5 to 5.0 times, and a foamed material with a higher expansion ratio than the aforementioned exterior material and a lower density of 2.0 to 15 times. A game board such as a go or shogi board, characterized in that the board is constructed by laminating a backing material made of resin foam. 2. A game board, such as a go or shogi board, as set forth in claim 1 of the utility model registration claim, wherein an exterior material is provided on at least the top and outer surfaces of the board. 3 The exterior material is made by arranging and converging a large number of thermoplastic resin foam strips on the surface that are denser than the interior in parallel,
A game board such as a go or shogi board according to claim 1 or 2 of the utility model registration claim, which is made of a foam board having a high-density skin layer formed by fusing adjacent strips to each other. 4. The exterior material and backing material are styrene resins such as polystyrene and copolymers mainly composed of styrene, olefin resins such as copolymers mainly composed of polypropylene, polyethylene, and olefins, copolymers of styrene and ethylene, A game board, such as a go or shogi board, as set forth in any one of claims 1, 2, or 3 of the utility model registration claim, which is made of a foam of polyvinyl chloride resin or other synthetic resin. 5. A game board, such as a go or shogi board, as set forth in any one of claims 1, 2, 3, or 4 of the utility model registration claim, in which the board is hollow inside.