JPH0217541Y2 - - Google Patents

Description

[Detailed explanation of the idea] This invention relates to bamboo shoots.

2. Description of the Related Art Conventionally, as a screen for use in bathrooms, sinks, etc., there has been known a screen made of wood or synthetic resin foam, in which an upper plate and a lower plate are fixed in a cross-shaped manner with nails, adhesive, or the like. However, wooden screens have disadvantages such as being susceptible to distortion due to water absorption and drying, and being susceptible to corrosion. In addition, conventional synthetic resin foam screens have low foaming upper and lower plates molded by extrusion molding or injection molding, so they have a hard surface and can easily slip when used in a bath. Ta. Furthermore, since each of the above conventional products has a structure in which the upper plate and lower plate are fixed with nails, adhesives, etc., the upper plate and lower plate fixed parts may loosen or come off due to long-term use, resulting in short service life. It was hot.

The present invention was devised in view of the above points, and an object of the present invention is to provide a screen that is excellent in anti-slip properties, shock-absorbing properties, mechanical strength, durability, etc.

That is, the present invention is made by integrally molding upper plates arranged in parallel with a predetermined interval and lower plates arranged in parallel with a predetermined interval in a cross-shape,
The gist of the present invention is a screen characterized by being constructed from an in-mold molded body of polypropylene resin foam particles.

Embodiments of the present invention will be described below with reference to the drawings.

As shown in FIGS. 1 and 2, the screen 1 of the present invention has upper plates 2 arranged in parallel at a predetermined interval and lower plates 3 arranged in parallel at a predetermined interval. It is integrally molded in a criss-cross shape and is composed of polypropylene resin foam particles molded in a mold.

Examples of the polypropylene resin constituting the screen 1 of the present invention include a polypropylene homopolymer, an ethylene-propylene copolymer, a mixture of an ethylene-propylene copolymer and a low-density polyethylene and/or an ethylene-vinyl acetate copolymer, etc. Can be mentioned.

The above-mentioned polypropylene resin may be crosslinked or non-crosslinked, but non-crosslinked is particularly preferred.

The screen 1 of the present invention uses the so-called bead molding method, in which pre-expanded polypropylene resin particles are filled into a mold and heated, the pre-expanded particles are heated and foamed in the mold, and the pre-expanded particles are fused together. The upper plate 2 and the lower plate 3 are integrally molded.

The reason why the material resin of the screen 1 of the present invention is a polypropylene resin is that this resin is optimal in terms of molding conditions and other aspects for obtaining a foamed particle molded product in a mold, and the molded product of this resin is This is because it has excellent physical properties that satisfy all the conditions required for screen screens, such as excellent cushioning properties, rebound resilience, mechanical strength, dimensional stability, heat resistance, and chemical resistance, as well as low water absorption. be. Although pre-expanded particles of polystyrene resin or polyethylene resin can also be applied to the bead molding method, the molded bodies obtained by this method have the following drawbacks. In other words, foamed polystyrene resin moldings have the drawbacks of being brittle and easily broken, as well as poor chemical resistance, while foamed polyethylene resin moldings cannot exhibit the desired cushioning properties and impact resilience. In addition to not being able to obtain low-density products (highly foamed), it is also complicated and difficult to manufacture, as the base resin (polyethylene) must be crosslinked. .

Since the screen 1 of the present invention is composed of a foamed particle molded body, it is possible to make the density of the molded body lower than that of a molded body formed by extrusion molding or injection molding, for example, 0.01 to 0.09 g/cm. The density can be ³ . When the density is set to 0.01 to 0.09 g/cm ³ in this way, the cushioning properties are further improved, the soft feeling when touching the skin is increased, and the tactility is also improved.

As shown in FIG. 3, the screen 1 is composed of a large number of particles 8 that are fused together, and the boundary 9 between the particles 8 is slightly concave (FIG. 4), and this concave portion 10 are formed in large numbers corresponding to the number of particles 8. Therefore, the surface of the screen 1 is relatively rough, has a large coefficient of friction, and is difficult to slip.
Therefore, when the screen 1 is used, for example, as a bathroom screen, there is no risk of accidents such as slipping and falling when walking on the screen 1, and the connection between the screen bottom board 3 and the bathroom floor is eliminated. This prevents slipping between the
Inconveniences such as unnecessary sliding of the screen will not occur. In FIG. 4, reference numeral 11 indicates a fused portion between the particles 8.

The present invention can also be configured as shown in FIGS. 5 to 8, for example, in order to further improve the prevention of slippage on the lower surface of the lower plate 3.

In the embodiment shown in FIGS. 5 and 6, a protruding foot portion 5 having a recess 4 in the center is provided on the lower surface of the lower plate 3. In this case, the inside of the recess 4 is caused by the load of the body weight. Since the pressure is reduced and the suction cup is brought into close contact with the floor surface, the anti-slip effect of the screen 1 can be further improved.

In the embodiment shown in FIG. 7, an inclined surface 6 is provided on the bottom end face of the foot portion 5. This makes it easier for the foot portion 5 to deform. has further improved, and as a result,
It is possible to further improve the adhesion between the foot portion 5 and the floor surface and further improve the anti-slip effect. Further, in the embodiment shown in FIG. 8, the rubber 7 is inserted into the lower surface of the lower plate 3 in a protruding or non-protruding manner to improve the anti-slip effect. It is also possible to similarly insert rubber 7 on the upper surface of the upper plate 2 to improve the anti-slip effect on the upper surface of the upper plate 2. The shape, size, and number of the foot portion 5 and the rubber 7 are arbitrary. Further, a non-foamed film such as polypropylene may be laminated on the upper surface of the upper plate 2.

The screen 1 of the present invention is particularly excellent for use in places where water is heavily handled, such as bathrooms and sinks, but it is not limited to use in bathrooms and sinks, but can also be used as a moisture-proof screen in a closet, for example. be able to.

As explained above, since the screen of the present invention is composed of polypropylene resin foam particles molded in a mold, it has a relatively rough surface, has a large coefficient of friction, and has the advantage of being difficult to slip. . According to the present invention, it is possible to prevent slipping not only on the upper surface of the upper plate of the screen but also on the lower surface of the lower plate.

In addition, the screen of this invention is made of polypropylene resin foam particles molded in a mold, so it has excellent cushioning properties, rebound resilience, mechanical strength, dimensional stability, heat resistance, and chemical resistance, and has a low water absorption rate. It has excellent properties that satisfy all required conditions. All of the above conditions cannot be satisfied with anything other than the in-mold molded polypropylene resin foam particles.

Furthermore, since the screen of this invention has an upper plate and a lower plate that are integrally molded, there is no room for the upper plate and lower plate to rattle or come off like conventional products, even after long-term use, and the service life is reduced. It has the advantage of being long and robust.

[Brief explanation of drawings]

The drawings show embodiments of the present invention. Fig. 1 is a perspective view showing one embodiment of the screen of the present invention, Fig. 2 is a perspective view of the rear side of the screen of Fig. 1, and Fig. 3 is a perspective view of the screen of the present invention. Enlarged detailed view showing the surface, Figure 4 is the same as Figure 3 -
FIG. 5 is a rear view of essential parts showing another embodiment of the present invention, FIG. 6 is a vertical cross-sectional view taken along the line - - of FIG. 5, and FIG. FIG. 8 is a vertical cross-sectional view of the main part showing another embodiment in which rubber is inserted into the lower surface of the lower plate. 1...Bamboo shoots, 2...Upper boards, 3...Lower boards.

Claims (1)

[Scope of utility model registration request] upper plates arranged in parallel at predetermined intervals;
and lower plates provided in parallel with a predetermined interval,
1. A screen which is integrally molded in a criss-cross shape and is composed of a polypropylene resin foamed particle molded body.