JP3119730B2 - Artificial turf - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an artificial turf made of synthetic resin having a ground portion formed in part.

[0002]

2. Description of the Related Art Synthetic resin artificial grass having a structure in which natural grass-like leaves are erected on the surface of a board or sheet-like base is used for tennis, baseball, softball and other sports and practice fields, or for general households. It is widely used as rugs such as verandas and solariums. However, since synthetic resins have electrical insulation properties, molded articles thereof are usually easily charged, and artificial turf made from this material is no exception.

[0003] In particular, when laid outdoors or in a stadium or a practice field where the degree of friction is high, when the weather continues or the air is severely dried, the human body such as a competitor is charged and accumulated. When an athlete or the like touches a metal pole or a net provided in the stadium during a competition, a severe shock may be caused by discharge, and the player may not be able to play happily.

Therefore, as shown in FIG. 4, a ground portion 102 is formed of a conductive resin material on a part of an artificial turf main body 101 formed of a non-conductive resin material, and the ground portion 102 is grounded (ground). There is an artificial turf 100 designed to solve this problem. The conventional artificial turf 10
No. 0, as disclosed in Japanese Utility Model Publication No. 3-42081, fits a member to be the ground portion 102 preformed from a synthetic resin material mixed with a conductive material to a separately formed artificial turf body 101 or the like. And unifying them as described in JP-A-4-14-1
It is formed by a method of integrally molding using a two-color molding machine as disclosed in JP-A-97611.

[0005]

However, in the above-mentioned conventional artificial turf 100, the connection area between the artificial turf main body 101 and the ground portion 102 is small and completely separated as shown in FIG. Less effective. Therefore, the effect of preventing charging may be insufficient. In addition, there is a disadvantage that the ground portion 102 is easily separated from the artificial turf main body 101 and falls off during use.

[0006] In view of such circumstances, an object of the present invention is to provide an artificial turf having a grounding part having an excellent grounding effect and having a grounding part and an artificial turf body firmly integrated.

[0007]

Means for Solving the Problems In order to achieve the above object, the artificial turf according to the present invention has natural turf-like leaves planted on a plate-like or sheet-like base, An artificial turf made of synthetic resin in which a ground portion made of a conductive resin material is partially formed, wherein a ground-side surface of a leaf-like body surrounding the ground portion is integrally formed with the ground portion. Is formed.

In the above structure, the non-conductive resin material forming the artificial turf main body including the leaf-like body is not particularly limited. For example, a thermoplastic resin such as polyethylene, polypropylene, polyvinyl chloride, polyvinylidene chloride, polyester, etc. Is mentioned. On the other hand, examples of the conductive resin material forming the ground portion include a material obtained by kneading a powder or short fiber of carbon or the like having excellent corrosion resistance such as stainless steel, copper, brass, and aluminum into the above-mentioned thermoplastic resin. It is preferable to use the same resin as the artificial turf main body.

[0009]

According to the above construction, even if the number of the ground portions is the same, the area of the interface between the artificial turf body and the ground portion is increased, and the surface area of the ground portion itself is also increased. Therefore, the ground effect is increased. Also,
Since the area of the interface between the artificial turf main body and the ground portion is increased, the adhesion between the artificial turf main body and the ground portion is also improved, and there is no possibility that the ground portion is separated from the artificial turf main body during use.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the drawings showing the embodiments. FIG. 1 is a cross-sectional view of a portion of an artificial turf according to the present invention in which a ground portion is provided.
As shown in the figure, the artificial turf 1 includes an artificial turf main body 2 and a ground part 3.

The artificial turf body 2 has a large number of leaf-like bodies 22 erected on a base 21 so as to surround the ground part 3. On the other hand, the ground portion 3 is configured such that the ground portion main body 31 is fitted to the artificial turf main body 2, and the ground portion main body of the leaf-shaped body 22 provided so that the branch piece 32 surrounds the ground portion main body 31. It is integrated along the surface on the 31 side.

Therefore, if this artificial turf 1 is used,
The area of the interface between the grounding portion 3 and the artificial turf main body 2 is larger than that of the related art, the surface area of the grounding portion 3 itself is increased, and the grounding effect is increased. Moreover, the artificial turf body 2 and the grounding section 3
There is no need to worry about the ground portion 3 being separated from the artificial turf main body 2 and falling off during use.

The artificial turf 1 of this embodiment can be manufactured, for example, as follows. That is, first, a two-color injection mold 4 as shown in FIG. 2 is prepared. The mold 4 includes a first gate 41 for injecting a non-conductive resin material to be the artificial turf main body 2 and a second gate 42 for injecting the conductive resin material.
A movable member (operating pin) 43 is provided in front of 2.

Therefore, first, the movable member 43 is
As shown in FIG.
The second filled with the conductive material injected from the gate 42
After the small cavity is separated from the first small cavity 44a filled with the non-conductive resin material, the non-conductive resin material 5 is removed from the first gate 41 as shown in FIG. Fill 44a. Next, while the non-conductive resin material 5 is in the semi-molten state, the movable member 43 is retracted as shown in FIG. 3B to form the second small cavity 44b in front of the second gate 42, and then the second small cavity 44b is formed. Gate 42
Then, the conductive resin material 6 is injected from the second small cavity 44b. By this injection, the conductive resin material 6 is filled in the second small cavity 44b, and the artificial grass 1 in which the ground portion 3 is integrated with a part of the artificial grass main body 2 as shown in FIG. I can do it.

In the above embodiment, the leaf-like body 22 has a needle shape. However, if a heat treatment is performed after molding, the leaf-like body 22 can be formed into a curled shape.

[0016]

The artificial turf according to the present invention is configured as described above, so that the area of the interface between the ground portion 3 and the artificial turf main body 2 is larger and the surface area of the ground portion 3 itself is larger than in the prior art. And the ground effect is increased. In addition, since the adhesion between the artificial turf main body 2 and the ground portion 3 is improved, there is no fear that the ground portion 3 separates from the artificial turf main body 2 and falls off during use.

Therefore, if an excellent grounding effect is exhibited for a long period of time and laid in a stadium or the like, a competitor can comfortably enjoy a game or the like.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing an embodiment of an artificial turf according to the present invention, showing the vicinity of a ground portion thereof.

FIG. 2 is a cross-sectional view showing an example of an injection molding die used for manufacturing the artificial turf according to the present invention.

3A and 3B are diagrams illustrating another example of the movement of the movable member of the mold in FIG. 2 and the step of injecting the resin material from the first gate or the second gate. FIG. Is a cross-sectional view showing a state in which the movable member has advanced into the cavity, and FIG. 2B is a cross-sectional view showing a state in which the movable member is retracted to the movable mold side.

FIG. 4 is a sectional view showing a known artificial turf.

FIG. 5 is an enlarged sectional view showing the vicinity of a ground portion of the artificial turf of FIG. 4;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Artificial turf 2 Artificial turf main body 3 Ground part 6 Conductive resin material 21 Base 22 Foliate

Continuation of front page (58) Field surveyed (Int.Cl. ⁷ , DB name) E01C 13/08

Claims (1)

(57) [Claims] An artificial turf made of synthetic resin in which a natural turf-like leaf is planted on a plate-like or sheet-like base, and a ground portion made of a conductive resin material is partially formed. An artificial turf, wherein a surface of the leaf-like body surrounding the ground portion on the ground portion side is formed of a conductive resin material integrally formed with the ground portion.