JP2002177008A - Rubber sole having strong grip - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rubber sole which has a strong grip and a high safety especially for other people. SOLUTION: The rubber sole 4 does not have a spike and has plenty of grip units 1 each of which consists of a base 5 having protrudings 6 and 7 whose tops are formed to be roughly flat or roughly spherical. The base 5 of a grip unit 1 has a height difference over the rubber sole face 4. The protrudings 6 and 7 have height difference over the base 5. The protrudings 6 and 7, the base 5 and the rubber sole face 4 are integrally formed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high-grip rubber sole used for shoes requiring high grip, such as boots, safety shoes, mountain shoes, fishing shoes and the like.

[0002]

2. Description of the Related Art For shoes that require a high grip such as boots, safety shoes, mountain shoes, fishing shoes, etc., a necessary and sufficient grip force is realized by drawing a non-slip pattern (pattern) on a rubber shoe sole. ing. However, the anti-slip pattern alone is not suitable for mountain shoes used, for example, in mountainous areas with many slopes. Therefore, spikes are often attached to rubber shoe soles. These conventional mountain shoes exhibit high gripping power by making the spikes bite into the ground. For this reason, it is a metal spike or a rubber spike in which a metal (stud) is fitted at least at the distal end portion.

[0003]

In a shoe having a rubber sole with a spike such as a mountain shoe, a spike attached to the rubber sole is bitten into the ground to obtain a grip force.
In particular, it was suitable for shoes requiring high grip, such as boots, safety shoes, mountain shoes, fishing shoes, and the like. Theoretically, the spikes are sharper, the larger the spike the better the grip.
However, in rubber soles with large spikes, the number of rubber sole planes that are difficult to contact the ground increases, and when soil, sand, weeds, etc. adhere to the spikes, the grip force decreases immediately, making it easier to slip. There was a problem.

[0004] Furthermore, metal spikes or rubber spikes using a metal at the tip have a considerable risk of injuring a person. For example, if a climber in mountain shoes falls,
Spikes may injure accompanying climbers. In severe cases, it was not uncommon for the accompanying climbers to step on their hands. Of course, it is preferable not to cause such a situation, but it is necessary to say that the rubber shoe sole, which could hurt people in the unlikely event, had a safety problem. Therefore, while demonstrating high grip,
Rubber soles for safety were studied.

[0005]

SUMMARY OF THE INVENTION As a result of the study, a rubber shoe sole to which no spike is attached has been developed. A number of grip units each having a base having a substantially flat or substantially spherical projection at its tip are provided. The base of this grip unit has a step with respect to the rubber sole plane and the projection has a step with respect to the base, respectively, and the high grip which integrally forms the projection, the base and the rubber sole plane is formed. Rubber soles. The rubber shoe sole according to the present invention is provided with a large number of grip units having a multi-stage configuration with respect to the rubber shoe sole plane, thereby realizing a rubber shoe sole capable of exerting a grip force not inferior to spikes.

[0006] Since the protruding portion constituting the grip unit has a substantially flat or substantially spherical tip, it does not hurt even if it touches the object like a spike. Also, unlike spikes, the protrusion does not bite into the ground, but exerts gripping force by locking the step provided between the protrusion and the base, the base and the rubber sole bottom plane to the ground. Therefore, it is not necessary to make the base and the protrusion so high. In the present invention, the height (projection amount) of the tip of the protrusion from the rubber shoe sole plane may be about 10 mm or less.
The slope or flat surface formed by the step of the base with respect to the rubber shoe sole and the step with respect to the base makes it easier to drop soil, sand, weeds, and the like, thereby preventing a decrease in grip force. The angle of the slope and the height of the plane forming the step may be the same or different for each grip unit.

Specifically, (1) the grip unit has a direction in which a main grip force is exerted depending on the positional relationship or the number of protrusions projecting from the base, and the direction is randomized. Rubber soles with multiple grip units. If the steps of the projections with respect to the base are made equal in all directions, the grip force can be obtained in all directions. If all the grip units are as described above, there is a possibility that the grip force of the entire rubber sole will decrease when the grip force of any of the grip units decreases. Therefore, by giving a direction to exert a grip force for each grip unit and making the direction random, even if one grip unit reduces the grip force, another grip unit exerts the grip force. Then, the grip force of the rubber sole is prevented from lowering as a whole. When a plurality of protrusions are provided on a single base, the height of each protrusion may be the same or different.

(2) A plurality of grip units are put together to form a grip group, and a rubber shoe sole having a large number of the grip groups is provided. By arranging a plurality of grip units that have directionality in the grip force as described above and arranging them as a group of grips, it is possible to increase the grip force in a specific direction, and it is suitable for carrying and stepping on the foot A practical rubber shoe sole having grip force and grip direction can be provided. On the other hand, if small grip units are individually and randomly arranged, the direction of the grip force will be lost, but these small grip units also constitute a grip group, so that the direction of the grip force is not impaired. And a rubber shoe sole having excellent aesthetic appearance. The type (shape, size, etc.) of each grip unit in the grip group may be the same or different, and the height of the base or protrusion of each grip unit may be the same or different.

Here, since a load is always applied to the protruding portion, it is necessary to use rubber having a hardness higher than that of the related art. Specifically, the protrusion, the base, and the rubber sole are formed integrally with high hardness rubber having a hardness of 65 to 85. The rubber sole of the conventional general rubber sole has a hardness of up to about 60, with priority given to securing the flexibility of the flat part. On the other hand, in the rubber shoe sole of the present invention, the protrusion and the base are provided while the protrusion has durability.
It is preferable that the hardness is higher than that of the related art because the step provided between the base and the rubber shoe sole plane is engaged with the ground to exert a gripping force. High hardness rubber to obtain this hardness, for example, it is better to increase the compounding ratio of natural rubber (NR) relative to butadiene rubber (BR), especially to increase the compounding amount of a reinforcing agent such as carbon to the protrusions .

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a high grip rubber shoe sole according to the present invention will be described below with reference to the drawings. FIG.
FIG. 2 is a plan view showing a rubber shoe sole 4 in which main and auxiliary grip units 1 and 2 and a heel grip unit 3 are arranged, and FIG. 2 is a sectional view taken along line AA in FIG.

This example, as seen in FIGS. 1 and 2,
A main grip unit 1 in which a hexagonal prism block 6 and a truncated cone block 7 are sequentially stacked on a cylindrical base 5, a sub-block unit 2 of a cylindrical block 9 having a hemispherical concave portion 8 on the upper surface, and a heel grip unit 3 as a shoe sole 4. It is arranged in. The main grip unit 1 disposed in front of the sole 4 is connected to the left and right sides by ribs 10 to form individual front grip groups 11.
In addition to providing the bent ribs 12 between each other, the auxiliary grip units 2 are arranged along the toe. The main grip unit 1 and the auxiliary grip unit 2 arranged behind the sole 4 are connected to each other by a rib 10 to form an integrated rear grip group 13, and the heel grip unit 3 has a plurality of hemispherical convex portions 14. . In addition, there is no grip unit at the position corresponding to the abdomen of the foot, and only the parallel rib rows 15, 15 are provided inward from both side edges, respectively, and the original flexibility of the rubber shoe sole 4 is maintained.

The front grip group 11 in which the main grip units 1 are connected by the ribs 10 has a substantially isotropic grip force by the hexagonal prism blocks 6, but the front grip group 11 is gripped by the ribs 10 in the front-rear direction as a whole. Demonstrate power. In the left-right direction, besides each main grip unit 1, bend ribs 12
Demonstrate the grip power. On the other hand, after the main grip unit 1 and the sub grip unit 2 are connected by the ribs 10, the grip group 13 exerts a substantially isotropic grip force as a whole because the directions of the ribs 10 are various. . This is based on the assumption that the heel rotates about the heel.

The rubber sole 4 of the present invention is made of synthetic resin.
The grip units 1, 2, and 3 having steps to which soil, sand, weeds, and the like are not easily adhered are integrally formed, and in addition to a grip force equal to or higher than that of spikes, safety that has been a problem with spikes is realized. Also, grip unit 1, 2, 3 or grip group
By giving directions to the grip forces of 11, 13 and appropriately allocating the directions, it is possible to generate a sufficient grip force in all directions as the entire rubber shoe sole 4. This directionality of exerting the gripping force is hard to be realized by a spike that exerts the gripping force by biting into the ground, which is a feature of the present invention. As described above, the present invention has a feature in the structure and arrangement of the grip units 1, 2, and 3, and does not cause injuries due to overturning or stepping on the grip units. The present invention provides a rubber shoe sole 4 that is highly safe against

FIG. 3 is a plan view corresponding to FIG. 1 showing a rubber shoe sole 4 of another example. In this example, the same main grip unit 1 as above,
It has a sub-block unit 16 composed of only the cylindrical block 9 and a heel grip unit 17. The main grip unit 1 arranged in front of the sole 4 is connected to the left, right, front and rear by a rib 10 to form an integral front grip group 18, and a secondary grip unit along the toe.
16 are arranged. The main grip unit 1 and the auxiliary grip unit 16 arranged behind the sole 4 are connected to each other by a rib 10 to form an integrated rear grip group 19, and the heel grip unit 17 is provided with a plurality of hemispherical convex portions 14. I have. Further, only the parallel rib rows 15 and 15 are provided at the positions corresponding to the belly of the feet, and the original flexibility of the rubber sole 4 is maintained. The difference from the above-described example (see FIG. 1) is that the grip force of the front grip group 18 is substantially isotropic, and a sufficient grip force is exerted even in an oblique direction.

[0015]

EFFECTS OF THE INVENTION The rubber sole with high grip of the present invention exerts the same grip force as the conventional spikes, while taking safety into consideration, and boots, safety shoes and mountain shoes which are highly safe for others. Thus, it is possible to provide shoes that require a high grip such as fishing shoes. Specifically, instead of generating a gripping force by biting the spike into the ground, a gripping force is generated by using a locking due to a step of the gripping unit, whereby (1) a protrusion that constitutes the gripping unit (2) The tip can be made almost flat or almost spherical, and (3) The entire grip unit can be made of synthetic resin integrally with the rubber sole, ensuring sufficient safety when the grip unit comes into contact with people. The effect is secured. In addition, the step exerts an ability to prevent adhesion of soil, sand, weeds, and the like that cause a decrease in grip force.

A grip unit or a group of grips instead of spikes can provide a direction in which a grip force is exerted, whereby a rubber shoe sole can exert a sufficient grip force in all directions. The function of adjusting the direction of the grip force is also a feature of the present invention. This means that even if similar grip units are used, it is possible to form rubber soles having different grip characteristics by adjusting the direction of the grip force for each grip unit or each grip group. I have.

The present invention is an improvement of the structure of the rubber sole,
In order to sufficiently exhibit each of the above effects, the synthetic resin of the grip unit formed integrally with the rubber shoe sole is preferably made of high hardness rubber having a hardness of 65 to 75. This is because, by increasing the mixing ratio of NR in the rubber constituting the conventional rubber shoe sole relative to BR, it is possible to obtain a high hardness rubber having a hardness suitable for the present invention. This means that it is possible to produce the rubber sole of the present invention without greatly changing the raw material of the conventional rubber sole, and it is possible to provide the high-grip rubber sole of the present invention while suppressing costs. Bring the effect.

[Brief description of the drawings]

FIG. 1 is a plan view showing a rubber shoe sole in which main and sub grip units are arranged in multiple stages on a circular base in plan view.

FIG. 2 is a sectional view taken along the line AA in FIG.

FIG. 3 is a plan view corresponding to FIG. 1, showing a rubber shoe sole of another example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main grip unit 2 Secondary grip unit 3 Heel grip unit 4 Rubber sole 5 Cylindrical base 6 Hexagonal block 7 Truncated cone block 8 Hemispheric recess 9 Cylindrical block 10 Rib 11 Front grip group 12 Folding rib 13 Rear grip group 14 Hemisphere Convex part 15 Parallel rib row 16 Another sub block unit 17 Another heel grip unit 18 Another front grip group 19 Another rear grip group

Claims (3)

[Claims] 1. A rubber shoe sole to which spikes are not attached, and a large number of grip units each including a base having a projecting portion having a substantially flat or substantially spherical tip are provided, and the base of the grip unit is A high-grip rubber sole, wherein the protrusion has a step with respect to the base with respect to the rubber sole plane, and the protrusion, the base and the rubber sole plane are integrally formed. 2. The grip unit has a direction in which a main gripping force is exerted according to the positional relationship or the number of protrusions protruding from the base, and a large number of grip units are arranged so that the direction is random. 2. A high-grip rubber shoe sole according to claim 1. 3. The high-grip rubber shoe sole according to claim 1, wherein a plurality of grip units are combined to form a grip group, and a plurality of the grip groups are provided.