JP3123128U - Composite buffer plate - Google Patents

Abstract

【Task】
Provide a buffer plate that is breathable, has a high energy absorption capability for impact, and has a soft contact surface for what is to be protected.
[Solution]
The composite shock-absorbing plate 1 according to the present invention is divided into two types: a styrene-based elastomer cross-linked foam plate 2 having closed cells with a plurality of holes 4 penetrating vertically and a low-resilience urethane foam plate-like body 3. The foamed plate-like body is laminated, and the styrene-based elastomer crosslinked foamed plate-like body 2 is provided with a large number of holes 4 penetrating vertically above and below the equilateral triangle so that the sides of the adjacent triangular holes are parallel to each other. The laminated surface of the styrene-based elastomer crosslinked foamed plate-like body 2 and the low-resilience urethane foam plate-like body 3 is adhered by a chloroprene rubber adhesive.
[Selection] Figure 1

Description

The present invention relates to a shock absorbing member that absorbs an impact.

  There are various materials for shock absorbing materials, but foam is one of the typical ones. Among them, in recent years, a low resilience foam material excellent in energy absorption has attracted attention.

  The low-resilience urethane foam plate is relatively inexpensive, soft and has little local pressure, so it is used for bedding and cushions. The air bubbles communicate with each other, and when the external force is removed after compression, it has the property of slowly returning to its original state. This low-resilience urethane foam sheet has a rebound resilience of about 15% or less (JIS K 6400-3) as compared with general foam.

  However, the disadvantages of the low-resilience urethane foam plate-like body include extremely brittleness, high temperature dependence, yellowing, water absorption, and lack of energy absorption when thinned.

  In order to solve such a problem, a low resilience foam having physical properties different from those of a general low resilience urethane foam plate has been developed. For example, cross-linked foams of styrenic elastomers with closed cells are excellent in energy absorption, but also have elasticity like rubber, and are relatively strong against heat, acid and alkali and excellent in weather resistance. ing. However, depending on the application, there is a drawback in that it has no breathability and is low in foaming (10 to 15 times), so that it is harder to touch than a low-resilience urethane foam plate.

  There is also a high-performance gel-like material as a low-resilience buffer material. This material has a very high buffering capacity, but is expensive, heavy and difficult to handle including processing.

  As described above, even a low-resilience buffer material has advantages and disadvantages, and there are examples in which a plurality of types of materials are laminated in order to solve the problem.

  A laminate in which a thermoplastic elastomer crosslinked material and another material are laminated has been filed (see, for example, Patent Document 1, Patent Document 2, and Patent Document 3). Moreover, the laminated body which laminated | stacked another raw material with the foam which opened the hole according to the objective is also devised (for example, refer patent document 4 and patent document 5).

JP-A-2005-247756 JP 2004-230380 A Japanese Patent Laid-Open No. 2004-07489 JP-A-6-269304 Japanese Utility Model Publication No. 6-062859

  The problem to be solved by the present invention is to provide a buffer plate-like body that is breathable, has a high energy absorption capability against impacts, and has a soft contact surface with respect to what is to be protected.

  The means of the present invention which intends to solve the above problem is that in the means of claim 1, the low repulsion consisting of closed cells having a plurality of holes 4 having a predetermined size and shape penetrating vertically is provided at a predetermined interval. A composite buffer plate 1 comprising a composite formed by laminating a low resilience urethane foam plate 3 having open cells on one surface of a styrene-based elastomer crosslinked foamed plate 2.

  The composite buffer plate according to claim 1, wherein the holes 4 are formed of equilateral triangles, and the sides of the equilateral triangles of the adjacent holes 4 are arranged in parallel. This is a body 1.

  According to the means of claim 3, the styrene-based elastomer crosslinked foamed plate-like body 2 having closed cells having the holes 4 has a fabric laminated on the surface opposite to the adhesive surface with the low-resilience urethane foam plate-like body 3. A composite buffer plate 1 according to the means of claim 1 or 2.

  According to the means of claim 2 above, the size of the equilateral triangle of the hole 4 is 3 to 50 mm per side, the interval between adjacent triangles is 3 to 50 mm, and the styrene-based elastomer cross-linked foam plate 2 is formed. These holes 4 have the same size and the same interval between adjacent triangles, and the size depends on the size of the object to be buffered and supported.

  The thickness of the styrene-based elastomer crosslinked foamed plate 2 used in the present invention is preferably 1 to 40 mm. The thickness of the low-resilience urethane foam plate-like body 3 used in the present invention is preferably 1 to 300 mm. The size of each plate-like body is 50 mm × 50 mm to 1000 mm × 2000 mm.

The physical properties of the styrene-based elastomer crosslinked foamed plate 2 used in the present invention are as follows: 25% compression hardness is ² to 4 N / cm ² (test: according to JIS K 6767) rebound resilience is 5 to 50% (test: Those according to JIS K 6301 are preferred.

  In the present invention, the laminated surface of the styrene elastomer cross-linked foam plate 2 and the low-resilience urethane foam plate 3 is adhered by an adhesive made of chloroprene rubber.

  The styrenic elastomer crosslinked foamed plate 2 used in the present invention can be provided with functions such as coloring, antibacterial processing (for example, blending with wormwood components), processing for generating negative ions (for example, blending with natural ceramics), and antistatic processing.

  The means of the present invention is to laminate two types of foamed plate, low-rebound styrenic elastomer cross-linked foamed plate and low-resilience low-rebound urethane foam plate, so that more A functional buffer plate was obtained. The low-resilience urethane foam plate is open-celled and excellent in pressure dispersibility, but it is fragile, has high temperature dependency, lacks weather resistance, and thins and lacks energy absorption (has a feeling of bottoming). On the other hand, the styrene elastomer cross-linked foam plate having closed cells has strong and excellent elongation, low temperature dependency, high weather resistance, low foaming (10 to 15 times) and high energy absorption even when thin. The pressure dispersibility is inferior to that of the low resilience foam. By laminating these two types, it has low temperature dependence, high weather resistance, high energy absorption including vibration damping as an impact buffer, strong resistance to tension, etc., pressure dispersibility In addition, an excellent buffer foam can be obtained. In addition, by providing a number of holes that penetrate the top and bottom of the styrene elastomer cross-linked foam having closed cells, excellent air permeability can be obtained while maintaining low repulsion, and the impact object is larger than the hole. The air cushion effect can be obtained, and further weight saving is realized.

  The shape of the hole formed by drilling as described in claim 2 is an equilateral triangle having a side of 3 to 50 mm, and the sides of the holes of adjacent equilateral triangles are arranged in parallel and the interval between the sides. By setting the thickness to 3 to 50 mm, the pressure can be dispersed on average. Moreover, the effect of an air cushion can also be obtained by setting the size of the triangle according to the size of the impact imparting object.

  Applications include medical, welfare, sports, shoes, home appliances, OA equipment, precision parts, architecture, vehicles, transport materials, mats, play equipment, and other various cushioning materials and protective members.

  Even under harsh conditions such as rallying of automobiles, it has low temperature dependency, high weather resistance, high energy absorption including vibration damping as an impact buffer, and strong against tension and other forces In addition, a shock-absorbing foam excellent in pressure dispersibility is useful, and is suitable for uses such as a seat for protecting a human body and a seat belt cover.

  Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a view showing a shock-absorbing foam according to the present invention. FIG. 2 shows a state before lamination of a low-rebound styrene-based elastomer cross-linked foam plate having a number of equilateral triangular holes and a low-repulsion urethane foam. FIG. 3 is a view schematically showing a state in which a styrene-based elastomer cross-linked foam plate having a large number of holes is partially lacking and a low-resilience urethane foam plate is laminated. FIG. 4 is a plan view of a mold for punching a hole in a low-rebound styrene elastomer crosslinked foamed plate.

  As shown in FIG. 1, a composite buffer plate 1 according to the present invention includes a styrene-based elastomer cross-linked foam plate 2 having closed cells and a low-resilience urethane foam plate having a plurality of holes 4 penetrating vertically. It is formed by stacking two kinds of foamed plate-like bodies of the body 3.

  As shown in FIG. 2, the styrene-based elastomer crosslinked foamed plate-like body 2 has a large number of equilateral triangular holes 4 penetrating vertically in the figure, and at this time, the sides of the adjacent equilateral triangular holes are parallel to each other. The vertices of six equilateral triangles are arranged closest to each other. These equilateral triangle holes are formed by punching the styrene-based elastomer crosslinked foamed plate-like body 2 using a flat mold 5 shown in FIG. The size and spacing of these holes can be designed to be optimal depending on the application. As shown in FIG. 3, the one surface of the styrene elastomer foam plate 2 having a large number of holes 4 and the low resilience urethane foam plate 3 are laminated with an adhesive made of chloroprene rubber, A composite buffer plate 1 according to the present invention is formed.

It is a figure which shows the composite buffer plate-like foam concerning this invention. It is a top view of a styrene-based elastomer cross-linked foam having a large number of equilateral triangular holes. It is a top view of the metal mold | die for extracting a hole. It is the figure which showed typically a mode that the styrene-type elastomer bridge | crosslinking foam plate-like body which pierced many holes and the low-resilience urethane foam plate-like body are laminated | stacked.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Composite buffer plate 2 Styrenic elastomer cross-linked foam plate 3 Low-resilience urethane foam plate 4 Hole 5 Mold for punching holes

Claims (3)

  Low resilience urethane foam having open cells on one surface of a low resilience styrene-based elastomer crosslinked foamed plate 2 comprising closed cells having a plurality of holes 4 having a predetermined size and shape penetrating in the vertical direction at predetermined intervals A composite buffer plate 1 comprising a composite formed by laminating plates 3.   The composite buffer plate-like body 1 according to claim 1, wherein the holes 4 are formed of equilateral triangles, and the sides of the equilateral triangles of the adjacent holes 4 are arranged in parallel.   The styrenic elastomer crosslinked foamed plate-like body 2 having closed cells having holes 4 has a fabric laminated on the surface opposite to the adhesive surface with the low-resilience urethane foam plate-like body 3. Alternatively, the composite buffer plate 1 according to 2.

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