JPH057707U - Elastic paving material - Google Patents

Abstract

(57) [Summary] (Modified) [Purpose] To provide elastic pavement material suitable for playgrounds that children and kindergarten children can play with peace of mind compared to conventional elastic pavement for sports facilities. The elastic pavement material 1 of the present invention has a structure in which foam chips 2 are bonded to each other through a thin binder layer, and voids 3 are formed between the foam chips. Foam chips are made of closed cell rubber and / or plastic foam and have a foaming ratio of 2 to 10 times. [Effect] Due to the interaction between the air bubbles inside the foam chips and the voids that exist between the foam chips, the appropriate shock absorption and softness are exerted, and the impact on the human body is greatly reduced. In addition, the pavement will be extremely safe and secure.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

  The present invention relates to an elastic paving material for paving the surface of a playground or a road. The present invention relates to an elastic pavement material that gives a proper cushioning property when walking or running.

[0002]

[Prior art]

  In recent years, in various sports facilities, traditional materials such as Antuca have been replaced by organic materials. A suitable thickness of material is used. For example, an athletic field, Urethanes with a rubber hardness (JIS) of about 40 to 60 at various ball fields and gymnasiums. Paving materials are widely used. However, this pavement material absorbs impact energy. Due to its small ability, it has the drawback of injuring the legs and waist of the human body due to prolonged exercise. This Rubbers obtained from EPDM or waste tires, etc., to solve such drawbacks as Chips (rubber hardness of about 50-60) are bound with a binder and have voids inside Porous pavement materials have been developed. With this porous pavement material, the air in the void is large Impact resilience is weakened by its ability to absorb impact energy, so it has a bad effect on the human body. The sound is reduced.

[0003]

[Problems to be solved by the device]

  However, conventional porous pavement materials are used for general sports facilities (tennis, basketball). It is suitable for playgrounds, but facilities such as elementary schools and nursing homes (playgrounds such as gardens and schoolyards) ) Lacks in softness and is too rigid.

[0004]   The purpose of the present invention is to emphasize safety rather than pavement mainly for sports. An object is to provide an elastic pavement material suitable for amusement halls, which has an appropriate softness.

[0005]

[Means for Solving the Problems]

  The elastic paving material of the present invention comprises foam chips bonded with a binder, As a foam chip, it has a void structure consisting of independent bubbles, and the bubble ratio is from 2 What is 10 times is used. In the present invention, the foam structure of the foam chip and The foam rate is important, and the foam chips with a closed cell structure with a foam rate of 2 to 10 times Only suitable.

[0006]

【Example】

  Hereinafter, the present invention will be described with reference to the drawings.

[0007]   FIG. 1 shows an elastic paving material 1 according to an embodiment of the present invention. This elastic pavement The packaging material 1 has a structure in which the foam chips 2 are bonded to each other through a thin binder layer. Therefore, the voids 3 are formed between the foam chips 2.

[0008]   The foam chip 2 is made of, for example, rubber such as natural rubber, SBR, BR, EPDM or PU. , Or polypropylene, polyethylene, polyvinyl acetate, polyvinyl chloride, etc. A closed-cell foam, preferably 2 to 10 times more foamed Has a foam rate.

[0009]   The particle size of the foam chip 2 depends on its material, foaming ratio, etc. It is arbitrarily selected according to the circumstances, but generally about 1 to 5 mm is suitable.

[0010]   As a binder for connecting the foam chips 2, rubber or synthetic resin is used. Rubber-based or synthetic resin-based binders commonly used for adhesion, such as Retan rubber, EVA, acrylic resin, etc. can be used.

[0011]   As foam chips     Bubble ratio: About 3 times     Average particle size: about 5 mm The foamed rubber chip of is used, and 20 parts by weight of 100 parts by weight of this foamed chip are used. After mixing the rubber binder, the bottom made of water-permeable asphalt concrete. A 20 mm-thick coating was applied to the surface of the ground base through a primer. Elastic pavement obtained The material had the following properties:

Compressive force (10%): 0.5 to 0.7 kg / cm ² Tensile strength: 5.0 to 8.0 kg / cm ² Specific gravity: 0.5 to 0.7 An elastic pavement material 1 according to the example of FIG. The elastic pavement material 1 of this example has a structure in which mixed chips obtained by mixing foam chips 2 and rubber chips 4 that have not been foamed at an appropriate ratio are bonded to each other through a thin binder layer. A void 3 is formed between the four. Instead of the rubber chip 4, a non-foamed plastic chip may be used.

[0013]   In actually applying the elastic paving material 1 shown in FIG. 1 of the present invention, for example, As shown in FIG. 3, the surface of the base substrate 6 such as water-permeable asphalt concrete. After applying a suitable primer 5 to the, add a binder to the foam chip 2 and mix A method of applying the above mixture to a predetermined thickness is adopted. Alternatively, with foam chips 2 The mixture with the binder is formed into a material with a predetermined thickness in advance, and this molding material is used as the base material. It can also be laid on the surface of the substrate via a primer.

[0014]

[Effect of device]

  As explained above, the elastic pavement material of the present invention has a foaming ratio of 2 to 10 times. Bond closed-cell rubber and / or plastic foam chips with a binder The combined structure makes it softer than conventional elastic paving materials of the same type. Is high. Moreover, due to the interaction with the voids that exist between the foam chips, an appropriate impact is obtained. Exhibits shock absorption and greatly reduces the risk of injury to the human body.

[Brief description of drawings]

FIG. 1 is a partial vertical sectional view of an elastic paving material according to an embodiment of the present invention.

FIG. 2 is a partial vertical cross-sectional view of an elastic paving material according to another embodiment of the present invention.

FIG. 3 is a partial vertical cross-sectional view showing a state in which the elastic paving material of FIG. 1 is provided on a base substrate.

[Explanation of symbols]

1 Elastic paving material 2 foam chips 3 void 4 rubber chips 5 primer 6 Base substrate

Claims (11)

[Scope of utility model registration request] 1. An elastic pavement material comprising a material in which foam chips are bound with a binder, wherein the foam chips have a void structure composed of independent bubbles, and the bubble ratio thereof is 2 to 10 times. 2. The elastic paving material according to claim 1, wherein the foam chips are foam rubber chips. 3. The elastic paving material according to claim 1, wherein the foam chips are foam plastic chips. 4. The elastic paving material according to claim 1, wherein the foam chips are a mixture of foam rubber chips and foam plastic chips. 5. The elastic paving material according to claim 1, wherein the binder is a mixture of foamed rubber chips and rubber chip rubbers. 6. The elastic paving material according to claim 1, wherein the binder is a mixture of foamed rubber chips and urethane chips. 7. The elastic paving material according to claim 1, wherein the binder is a mixture of foamed plastic chips and rubber chips. 8. The elastic paving material according to claim 1, wherein the binder is a mixture of foamed plastic chips and urethane chips. 9. The elastic pavement material according to claim 1, wherein the binder is a rubber-based binder. 10. The elastic pavement material according to claim 1, wherein the binder is a synthetic resin binder. 11. The elastic paving material according to claim 10, wherein the binder is a urethane binder.