JP2686035B2 - Shock absorbing member for shoes and shoes with shock absorbing function - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shoe, especially a sports shoe, which requires the sole of the shoe to have both a shock absorbing function and a repulsive force imparting function.

[0002]

2. Description of the Related Art Conventionally, a midsole or an insole for sports shoes has various shock absorbing structures in order to mitigate the shock of the foot or leg due to the landing impact force during running or jumping. Things have been proposed.

For example, a base made of a stretchable elastic material, at least a pair of side mounting plates extending continuously to the left and right from the center of the base, and provided at least at the tip of the side mounting plates. And a bed-shaped cushioning portion fixed to the central portion of the base, and the fixing portion is configured to be fixed to a side portion of the bottom member of the footwear. Japanese Patent Application Laid-Open No. 2-74202 discloses a cushioning member for footwear, in which a gel material is enclosed in a deformable outer casing. In this footwear cushioning member, shock absorption and repulsive force application in the longitudinal direction of the shoe are performed by a bed-like buffer section, and repulsive force application in the width direction of the shoe is performed by at least a pair of side mounting plates.

Further, a buffer layer made of a gel material sheet material divided into a large number of independent compartments is polymerized on a required portion of the bottom of the shoe, and the gel material sheet material is penetrated by 50 to 200.
Japanese Patent Laid-Open No. 62-159601 discloses a shock-absorbing shoe made by mixing minute hollow spheres in a gel substance of a certain degree. This shock-absorbing shoe is designed such that shock absorption is dispersed by a large number of independent sections.

Alternatively, a sheet material 42 as shown in FIG.
a shock absorbing member for shoes 42 in which a gel substance 42b is enclosed in a,
Furthermore, a shock absorbing member for shoes made of a foamed urethane material or the like is known.

[0006]

For example, in sports shoes such as tennis, badminton, basketball, etc., which require agile foot movements, the soles of the feet of a player who moves violently and diversifiedly in the front, rear, left, right, or up and down directions. It absorbs the impact force against pressure, and
Instantly move to the next action by the player (give momentum)
In order to be able to
It is required to have a function that allows this to act in multiple directions according to various movements of the player. In other words, it is necessary to have both a good shock absorbing function and a multi-direction repulsive force imparting function.

However, all of the conventional constructions are mainly intended to absorb impact force, and are not constructed so that repulsive force can act in multiple directions. That is, the impact absorbing member (gel material or foam urethane material, gel material or side mounting plate in Japanese Patent Laid-Open No. 2-74202) is elastically (compressed) deformed by the pressure from the sole of the player, and mainly,
Since the repulsive force is obtained by the restoring force, the repulsive force acts only in the direction opposite to the impact force, or
Even if it acts in multiple directions, it becomes extremely weak. Of course, such a repulsive force is effective when the player is always performing only a linear reciprocating motion, but for example, when the player suddenly changes the movement from front to back, left to right, This movement change cannot be followed (the response to the movement change is poor), and it cannot contribute to the instantaneous force application.

For the same reason, the conventional structure tends to have an insufficient shock absorbing function.

Therefore, the present invention provides a shock absorbing member having both a good shock absorbing function and a multidirectional repulsive force imparting function,
Another object of the present invention is to provide a shoe with a shock absorbing function.

[0010]

A shock absorbing member for shoes according to claim 1 is made of an elastic material and has a required internal volume.
Communication between multiple independent compartments and between independent compartments
A sheet material having a passage, and an independent section of the sheet material and
Enclosed in a continuous enclosed space formed by passages
And a fluid. Fluid viscosity is 10 to 10 ⁵
Centipoise (value at 40 ° C), independent section
Fluid inside can flow to other independent compartments through passages
You. The shock absorbing member for shoes according to claim 2, wherein the fluid is the dense
It is enclosed in a smaller amount than the total volume of the closed space.

According to a second aspect of the shock absorbing member for a shoe of the present invention, in the above structure, a gel material is used as the fluid.

According to a third aspect of the present invention, there is provided a shoe with a shock absorbing function, wherein the shoe shock absorbing member according to the first or second aspect is attached to a required shock absorbing portion on the bottom surface of the shoe.

[0013]

When an independent compartment receives an impact force from the sole of the foot, the internal pressure of the sole compartment causes the fluid contained in the independent compartment to flow to the other independent compartment through the passage. Similarly, the internal pressure of the other independent compartment increases due to the inflow of the fluid, and the fluid enclosed in the other independent compartment flows to the other independent compartment via the passage. In this way, the impact force acting on one independent compartment is propagated through the flow of the fluid to all the other independent compartments, and all the independent compartments (including the independent compartment on which the impact force acts) It is converted to an increase in internal pressure and absorbed. Since the amount of increase in the internal pressure is uniform in all the independent sections, the impact force is evenly absorbed by all the independent sections.

On the other hand, the independent compartment into which the fluid has flown rises due to the rise in the internal pressure, and pushes up the sole portion in contact with this. This pushing-up force acts as a repulsive force, and this repulsive force acts on a sole portion different from the sole portion that receives a landing impact, and the directions thereof are not limited to the opposite direction to the impact force and are multidirectional.

[0015]

Embodiments of the present invention will be described below.

As shown in FIG. 1, the shoe with shock absorbing function of this embodiment is a shoe 1 consisting of an upper 1a, an insole 1b, a midsole 1c and an outsole 1d. The impact absorbing member 2 is attached to the heel and forefoot. The shoe sole has a multi-layered structure including an insole 1b, a midsole 1c, and an outsole 1d, and the shock absorbing member 2 is inserted in the midsole 1c. Midsole 1c is top 1
c1 and the lower part 1c2, and the recesses 1c3, 1c4 are provided in the heel part and the forefoot part of the lower part 1c2.
After inserting the shock absorbing member 2 into 3, 1c4 respectively,
The upper part 1c1 and the lower part 1c2 are polymerized. Such a shoe sole is fixed to the bottom surface of the upper 1a.

As shown in FIG. 2, the shock absorbing member 2 comprises a sheet material 2a and a fluid 2b enclosed in the sheet material 2a, and a large number of independent sections 2c in which the fluid 2b is enclosed.
And a passage 2d for communicating between the independent sections 2c, and
All the independent sections 2c communicate with each other via a passage 2d in a chain form. The fluid 2b enclosed in each independent section 2c is
It can flow to another adjacent independent section 2c via the passage 2d. In the case of this embodiment, the shape of the independent section 2c is a semicircular shape, but the shape is not limited to this, and may be an elliptical shape, a polygonal shape, an island shape, or the like. However, shock absorption, multidirectionality of repulsive force, durability of sheet material 2a (stress concentration is less likely to occur)
In consideration of the above, it is preferable that the independent section 2c has a semicircular shape.
Note that in FIG. 2b, the independent section 2c is slightly flat in the height direction. This is because the enclosed amount of the fluid 2b is slightly smaller than the total volume of the independent compartment 2c and the passage 2d in order to ensure the fluidity of the fluid 2b (a slight negative pressure in the independent compartment 2b). It is in a state). Further, the number of the independent sections 2c is appropriately set according to the function of the shoe to be used, but it is good to set it to 2 to 10, preferably 3 to 7. Such a shock absorbing member 2 is, for example, a sheet material 2
After the fluid 2b is enclosed in a, it can be formed by press molding using a mold corresponding to the size and shape of the independent section 2c and the passage 2d.

The sheet material 2a may be any material as long as it can enclose the fluid 2b, and the material thereof is not particularly limited, but a material having appropriate elasticity and excellent durability and moldability, for example, polyvinyl chloride. It is better to use materials.

Also, the fluid 2b to be sealed in the independent compartment 2c
Can be liquid, gas or gel, but the viscosity is 10 to 10 ⁵
Centipoise (at 40 ° C), preferably 1
0 ² to 10 ⁴ centipoise, glass transition point (Tg))-
It is preferably 20 ° C or lower, preferably -40 ° C or lower, and the specific gravity is as low as possible. Specifically, it is desirable to use a gel substance such as liquid polybutadiene rubber and silicon gel, but other gel substances such as IR, liquid urethane rubber, plasticizer, oil and the like may be used. Further, water or the like which is an incompressible fluid may be used.

As shown schematically in FIG. 3, when a certain independent section 2c (referred to as 2c1) receives an impact force P from the sole of the foot, the shock absorbing member 2 is moved to the independent section 2c1 due to an increase in its internal pressure. The enclosed fluid 2b flows into another adjacent independent section 2c (referred to as 2c2) via the passage 2d. Similarly, the internal pressure of the other independent section 2c2 rises due to the inflow of the fluid 2b, and the other independent section 2c (not shown) in which the fluid 2b enclosed in the independent section 2c2 is further adjacent to the other through the passage 2d. Flow to. In this way, the impact force P acting on a certain independent section 2c1 is propagated in a chain to all the other independent sections 2c via the flow of the fluid 2b, and all the independent sections 2c (the independent sections on which the impact force P acts are independent. It is converted into an increase in the internal pressure of the section 2c1 (including the section 2c1) and absorbed. Since the amount of increase in the internal pressure is uniform in all the independent sections 2c, the impact force P is evenly absorbed by all the independent sections 2c. On the other hand, the other independent compartment 2c2 into which the fluid 2b has flown rises due to the rise in the internal pressure (the other independent compartment 2c not shown also rises), and pushes up the sole part in contact therewith. This pushing force becomes the repulsive force F, and this repulsive force F is the impact force P.
It acts on a sole part different from the sole part (the sole part that receives a landing impact) that exerts a force, and the direction thereof is not limited to the direction opposite to the impact force P and is multidirectional.

FIG. 5 shows the results of a comparative test of four types of shoes with shock absorbing functions (shoes A to D) for shock absorption and feeling. The shoes A and B are the ones equipped with the shock absorbing member 2 having the structure shown in FIG. 2 (this embodiment product), the shoes C are those equipped with the shock absorbing member made of a foamed urethane material (conventional product), and the shoe D is The shock absorbing member 42 having the configuration shown in FIG. 4 is attached (conventional product). The shock absorbing member 2 in the shoe A includes a sheet material 2a made of vinyl chloride and a liquid polybutadiene rubber (having a molecular weight of 20 as a fluid 2b).
00) is encapsulated, and the shock absorbing member 2 in the shoe B is a sheet material 2a made of vinyl chloride and silicone gel encapsulated as the fluid 2b. The shock absorbing member 42 in the shoe D includes a sheet material 42a made of vinyl chloride and a fluid 42
Liquid polybutadiene rubber (molecular weight 2000) is enclosed as b. These shock absorbing members are attached only to the heel portion (1c3 portion) of the shoe 1 shown in FIG.

Impact absorption was evaluated by using a drop-weight type impact tester, dropping a 13 kg striker from the height of 5 cm to the heel part (1c3 part) of the shoe 1, and measuring the maximum load at that time. did. In addition, the feeling is that the three players actually wear shoes A to D, respectively, and violently move forward, backward, leftward, rightward, and downward like tennis play, and the degree of ease of movement at that time ( The degree of response of the shoe when changing from one movement to a new movement) is evaluated in 5 levels,
The average value was taken (the larger the evaluation score, the better the feeling). As shown in FIG. 5, the product of this example had better shock absorption and feeling than the conventional product.

In the shock absorbing member 2 used in this embodiment, the independent sections 2c arranged side by side in the front-rear direction of the shoe so as to exert excellent resilience performance during forward running, which is the most frequent movement of humans. There are many passages 2d communicating with each other. That is, when a person runs forward, first touch the ground with the heel,
The ground contact point gradually moves to the toe side, but at this time, the internal pressure of the independent section 2c from the heel first rises, the fluid 2b flows to the independent section 2c from the toe, and the repulsive force F when kicking the ground is increased. It is to make it bigger. The direction in which the passage 2d is increased is determined by the intended use of a person wearing shoes.

[0024]

As described above, the shock absorbing member for shoes of the present invention has a structure in which the fluid enclosed in each independent compartment can flow to the other independent compartments via the passages. All independent sections absorb the impact force from the back evenly, and at the same time, multi-directional repulsive force is applied to the sole due to the pushing up effect of the independent section into which the fluid has flown. Therefore, according to the present invention, it is possible to provide a shock absorbing member for shoes having both a good shock absorbing function and a multi-direction repulsive force imparting function.

The above effect becomes more remarkable by using a gel substance as the fluid.

Further, the shoe with a shock absorbing function in which the shock absorbing member for shoes according to the present invention is attached to a required shock absorbing portion on the bottom surface of the shoe has good shock absorbing property and feeling feeling due to the above effects, Especially, it is most suitable as sports shoes.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a shoe with a shock absorbing function according to an embodiment.

2 is a plan view (FIG. A) showing a shock absorbing member for shoes according to an embodiment, and a bb sectional view (FIG. B) in FIG.

FIG. 3 is a cross-sectional view schematically showing the function of the shock absorbing member for shoes shown in FIG.

FIG. 4 is a plan view (FIG. A) showing a conventional shock absorbing member for shoes, and a bb sectional view (FIG. B) in FIG.

FIG. 5 is a diagram showing the results of a comparative test of impact absorption and feeling.

[Explanation of symbols]

 1 shoe 2 shock absorbing member 2a sheet material 2b fluid 2c independent section 2d passage

Claims (4)

(57) [Claims] 1. A required internal part made of an elastic material
Multiple independent compartments with a volume and between independent compartments
Independent of the sheet material having a passage for passage and the sheet material
In a continuous enclosed space formed by compartments and passages
The fluid has a viscosity of 10 to 10 ⁵ centipoise (40
The value in ° C), and the fluid in the independent compartment can flow to another independent compartment via the passage. 2. The fluid is less than the total volume of the closed space.
The shock absorbing part for shoes according to claim 1, wherein the shock absorbing part is enclosed in a small amount.
Wood. 3. The shock absorbing member for shoes according to claim 1, wherein a gel material is used as the fluid. 4. A shoe with a shock absorbing function, wherein the shock absorbing member for a shoe according to claim 1, 2 or 3 is attached to a required shock absorbing portion on the bottom surface of the shoe.