JP2020031896A - Cushion material and footwear using the same - Google Patents

Abstract

To provide a cushion material, a sock liner and footwear having an elastic material such as a sponge as the cushion material for shock absorption for a part from the heel to a tread part and causing less settling phenomena.SOLUTION: The cushion material 10 of a foot contact side of footwear, includes an integral sponge from a heel part 16 to a tread part 14 of a foot sole, and a sheet material tightly-attached to the sponge from the top/bottom along with air to seal it. The sock liner includes the cushion material 10 between an insole bottom and a flexible insole surface covering the upper surface of the insole bottom. The footwear includes the cushion material 10 in the foot contact side of a shoe sole.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a cushioning material, an insole using the same, and footwear such as sandals and shoes provided with the insole.

  2. Description of the Related Art At present, various products are used for improving functionality such as improving comfort and improving shock absorption. Also, various techniques have been proposed for imparting such functionality to an insole used in the instep. Conventionally, sponge materials made of various materials have been used in order to alleviate the impact on the soles caused by walking or the like and to improve comfort. Improvements have been made to the material and shape of the sponge material to absorb impact and reduce the burden on the soles and lower limbs.

  As a cushion material for absorbing shock, a material provided with an insole in which gas or liquid is sealed is also used. As a gas, for example, a cushion material that seals air is generally called an air cushion.

  Many types and shapes of sponge materials have been proposed for an insole provided with a sponge cushion material that has been conventionally used. An insole provided with a sponge cushion material has a problem in that its elasticity is reduced due to long-term use in various applications (for indoor use, competition, etc.) and its shape is lost, so that a so-called "set" phenomenon occurs.

  On the other hand, in the case of the air cushion material, the "set" phenomenon which occurs in the sponge material does not occur, but there is a problem that the repulsive force of the air is constant and various repulsive forces such as the cushion material cannot be selected. Further, a space for sealing an air or the like for absorbing a shock is formed in the heel portion and the arch portion, and a passage connecting these spaces is also required. Therefore, there is a problem that the structure becomes complicated. Furthermore, depending on the degree of air flow, there is also a problem that a space in which air or the like is sealed unnecessarily expands, resulting in poor comfort.

  When walking or stepping, a load is applied to the stepped portion, and when landing, a load is applied to the heel portion. In this way, the entire foot sole from the heel to the stepping portion has a shock-absorbing effect appropriately in accordance with the walking motion, and a sponge material having many types is used as a shock-absorbing material. There is a demand for a cushion material that is difficult, an insole using the same, and footwear provided with the insole.

  An object of the present invention is to provide a cushioning material having an elastic material such as sponge as a cushioning material for absorbing shock from a heel portion to a stepping portion, and to prevent a set phenomenon, and to use the cushioning material. To provide insoles and footwear.

  The present invention (1) is a cushion material on the foot contact side of footwear, comprising: an integral sponge extending from the heel portion of the sole to the stepping portion; and a sheet material that tightly seals the sponge with air from above and below. It is a cushion material having.

  A first feature of the present invention (1) is that an integral sponge is provided from the heel region of the sole to the step portion region. Since a sponge for absorbing shock is provided from the heel portion to the stepping portion, it has a shock absorbing effect over the entire walking of a person and the like, and since it is integrated, the structure is simple and the manufacturing cost is reduced.

  A second feature of the present invention (1) is that the sponge is tightly sealed with air from above and below by a sheet material. Due to this structure, the air inside the sponge covered with the sheet material cannot escape to the outside, and also exhibits the effect as a so-called air cushion.

  Since the sponge and the sheet material are in close contact with each other, both the shock absorbing effect of the sponge and the shock absorbing effect of the air cushion are provided, so that the thickness can be reduced as compared with the cushion material of the sponge alone or the air cushion alone.

  In the standing state, a load is applied to the heel and the tread, so the air in the heel and the tread flows from the heel and the tread into the arch region between the heel and the tread, and the upper sheet is removed. Pushing up, the area between the toe area of the sole and the arch area creates an air cushion effect. The effect of both sponge and air improves the comfort of the sole of the sole and the tread.

  When stepping on the foot, the step on the sole presses the cushion material, and the shock on the step on the sole is absorbed by the sponge and air. A part of the air in the stepped portion in the cushion material flows into the heel side by the pressing and the air in the heel region increases, so that the upper surface of the sheet material is pushed upward. Thereafter, when the heel portion of the sole lands, the air in the heel region absorbs a large impact, and when the air flows backward to the stepping-out side, the sponge becomes a cushion material and exhibits an impact absorbing effect. The backflowed air flows into the stepped portion side of the cushion material, and pushes up the upper surface of the sheet material of the stepped portion, thereby exerting a great effect on absorbing shock at the next stepping.

  The cushion material is constantly compressed during use due to a load applied from above, so that the thickness is reduced by so-called "sag", and the cushioning property is deteriorated after long-term use. In the present invention (1), since air flows into the interior of the cushion material, the "set" due to compression is always improved, and the durability of the sponge is improved. Furthermore, in the present invention (1), since the shock is absorbed by both the sponge and the air, the load on the sponge is small and the durability of the sponge is improved, as compared with the conventional cushioning material using a sponge alone as the shock absorbing material. I do.

  The present invention (2) provides a first region portion corresponding to the heel portion of the sole, a second region portion corresponding to the stepping portion of the sole, and a third region portion between the first region portion and the second region portion. The present invention (1) is provided with an area portion, wherein the width of the second area portion is larger than the width of the first area portion, and the width of the third area portion is smaller than the width of the first area portion. It is a cushion material.

  The feature of the present invention (2) allows the cushioning material to appropriately fit the shape of the sole of the foot, so that the cushioning effect is improved and the comfort is good.

  The present invention (3) is a footwear insole in which the cushioning material of the present invention (1) or (2) is interposed between an insole bottom and a flexible insole covering the upper surface thereof.

  This insole has cushioning material interposed between the insole bottom and the insole, so it has both a sponge cushion and an air cushion. It has high properties. Further, since the thickness of the cushioning material of the present invention (1) or (2) can be reduced as described above, it becomes possible to provide an insole provided with this cushioning material in a thin insole. .

  The present invention (4) is characterized in that a cushion material accommodating recess having a depth substantially equal to half the thickness of the cushion material is formed on the upper surface of the insole bottom, wherein the cushion material accommodating recess is formed. It is insole of footwear. Since the cushion material accommodating recess is formed, it becomes easy to attach the cushion material to the insole, and the cushion material does not move in the insole.

  The present invention (5) is a shoe provided with the cushion material according to the present invention (1) or (2) on the foot contact side of a shoe sole. The cushioning material according to the present invention (1) or (2) has a good shock absorbing performance, good wearing comfort, and durability by integrating a sponge cushion and an air cushion and simultaneously exhibiting both cushioning properties. High cushioning material. By attaching this cushion material to the foot contact side of the shoe sole, footwear having these excellent functions can be provided.

  The present invention (6) is a shoe provided with the insole according to the present invention (3) or (4). The insole material according to the present invention (3) or (4) has good cushioning properties and comfortable feeling, and further has good durability. Therefore, footwear provided with this insole also has good cushioning properties and comfortable feeling and good durability. Become.

  Since the present invention is configured as described above, it is possible to provide a cushioning material having excellent shock absorbing performance and durability from the heel portion to the stepping portion, and to provide an insole and footwear provided with the cushioning material.

It is a top view of the cushion material (Example 1) of the left foot side by this invention. It is XX sectional drawing of FIG. It is a figure showing typically a situation when weight is applied to the cushion material. It is a left foot side plan view of the insole (Example 2) by this invention. It is a perspective view which shows the structure of the left foot side of the insole (Example 2) by this invention. FIG. 5 is a sectional view taken along line YY of FIG. 4. It is a perspective view of the footwear equipped with the insole of Example 2.

  Hereinafter, preferred embodiments of the present invention will be illustratively described in detail with reference to the drawings. However, the materials, shapes, relative arrangements, and the like of the components described in this embodiment are not intended to limit the scope of the present invention, but are merely illustrative examples, unless otherwise specified. Absent. In addition, the directions of the members and the like may be referred to as upper, lower, left, and right depending on the directions in the drawings for convenience, but these do not limit the scope of the present invention.

  FIG. 2 is a plan view of the cushion material 10 (Example 1) on the left foot side according to the present invention, the whole being a first region portion 16, a second region portion 14, and a region between the first region portion 16 and the second region portion 14; The third region 15 is provided, and is integrated. Along the outer periphery, the upper sheet 12 and the lower sheet 13 of FIG. As the material of the upper sheet 12 and the lower sheet 13, a thermoplastic resin that can be easily heat-sealed can be used. For example, polyvinyl chloride (PVC) is preferred because of its easy handling and low cost.

  A first region portion 16 corresponding to the heel portion of the sole, a second region portion 14 corresponding to the stepping portion of the sole, and a third region portion 15 between the first region portion 16 and the second region portion 14 The width of the second region 14 is larger than the width of the first region 16, and the width of the third region 15 is smaller than the width of the first region 16. By adopting such a shape that fits the shape of the sole, the cushion effect is improved and the comfort is improved.

  FIG. 2 shows a cross section taken along line XX of FIG. The sheet material includes an upper sheet 12 and a lower sheet 13 which are sheet materials made of a material that does not allow air to pass through. The sponge 11 is in close contact with the upper sheet 12 and the lower sheet 13 in a sealed space. As the sponge 11, various materials used as a cushion material for footwear can be used. For example, there are a sponge made of a synthetic resin and a sponge made of a natural resin. Various sponges such as a urethane sponge, a polyethylene sponge, an ethylene propylene rubber sponge, and a chlorobutylene rubber sponge can be used as the synthetic resin sponge. Natural rubber sponges include natural rubber sponges.

  FIG. 3 schematically shows the load applied to the cushion member 10 and the movement of air inside the cushion member 10. The cushioning material 10 is actually provided on the insole 20 (see FIG. 4) and the footwear side of the footwear, but in FIG. 3, in order to clearly show the movement of air inside the cushioning material 10, the cushioning material 10 is directly attached to the cushioning material 10. Shows a state where the sole of the foot is in contact with. In addition, the thickness of the cushion material 10 is shown to be larger than the actual thickness so that the air flow can be easily understood.

  FIG. 3A shows a state in which a person stands and comes into contact with the cushion material 10, but the weight has not yet been applied to the cushion material 10. The stepping portion 14a of the sole contacts the second region 14 of the cushion material 10, and the heel portion 16a of the sole contacts the first region 16 of the cushion material 10. The third region 15 of the cushion material 10 does not contact the arch 15a of the sole.

FIG. 3B shows the deformation of the cushion material 10 and the movement of air inside the cushion material 10 when a load due to the weight of the person standing upright is applied to the cushion material 10. By the load, the sole of the trampling portion 14a takes the force F ₁ is downward, the sole of the heel portion 16a takes the force F ₂ is downward, and the second region 14 of the cushion member 10 first The first region 16 is deformed into a concave shape. Pressing by the force F ₁ and F ₂ is the deformation due to the sponge 11, a second region 14 and the first region portion 16 is softened by the buffer effect of being deformed into a concave shape. The air inside the second region 14 and the first region 16 flows into the third region 15 and presses the arch 15a of the sole upward from below. The arch 15a of the sole is firmly supported by the pressed force. From this state, the user steps in the direction of the arrow.

FIG. 3C shows a state when the foot is stepped on. The stepped portion 14a of the sole, joined by a large F ₃ than the force F _1, the second region 14 of the cushion member 10 is depressed significantly. Due to the effect of the large deformation, a shock buffering action by the sponge 11 and a shock buffering action by air are generated in the stepping portion 14a of the sole, and the impact on the stepping portion 14a of the sole is alleviated. The air inside flows as indicated by the dotted arrow, and a large amount of air flows into the first region 16, so that the upper sheet 12 per the first region 16 greatly expands upward.

FIG. 3D shows a state in which the cushion material 10 on the heel 16a side of the stepped foot touches the ground. The sole of the heel portion 16a large force F ₄ is applied than the force F _2. As shown in FIG. 3 (C), since the first region 16 of the cushion material 10 has a sufficient amount of air, the heel portion 16a of the sole has a large shock buffering effect due to the air. Furthermore, the shock buffering action of the sponge 11 is added, and the impact on the heel 16a of the sole is greatly reduced. The air moves in the direction of the dotted arrow, and the amount of air on the second area 14 side increases to prepare for the next foot movement.

  FIG. 4 shows a plan view of the insole 20 of Example 2 on the left foot side. The toe side and the heel side of the insole 20 of the insole 20 are partially removed so that the inside can be seen. The cushion material 10 is mounted on the insole bottom 21. The cushion member 10 can be fixed to the insole bottom 21 and / or the insole epithelium 22 using an adhesive or a double-sided tape so as not to move.

  The insole 22 has many holes 23 formed therein. In this way, the inside of the insole can be ventilated, and at the same time, features of design can be obtained.

  FIG. 5 is a perspective view when the insole 20 of the second embodiment is disassembled. The insole bottom 21 includes an insole bottom plate 21a and an insole cushion 21b. The insole bottom cushion 21b is formed with a cushion material accommodating recess 24 having a depth substantially equal to half the thickness of the cushion material 10. The cushion material 10 is fitted into the cushion material accommodating recess 24, and the insole epithelium 22 is put on the cushion material 10 from above, and is bonded to the upper surface of the insole bottom 21. This prevents the cushioning material 10 from being more firmly attached and moving within the insole 10. An arch-side sponge 25 for further improving comfort is adhered to the arch side on the back surface of the insole 22.

  FIG. 6 is a longitudinal sectional view of the insole 20 according to the second embodiment.

  FIG. 7 is a perspective view of footwear 30 equipped with the insole 20 according to the second embodiment. The insole 20 is equipped with the cushioning material 10. The cushion material 10 can be attached to the footwear 30 without passing through the insole 20.

10: Cushion material 11: Sponge 12: Top sheet (sheet material)
13: Lower sheet (sheet material)
14: 2nd area part 14a: Stomping part of sole 15: 3rd area part 15a: Arch part of sole 16: 1st area part 16a: Heel part of sole 17: Seal part 20: Insole 21: Insole bottom 21a: insole bottom plate 21b: insole bottom sponge 22: insole epithelium 23: hole 24: cushion material accommodating recess 25: arch-side sponge 30: footwear

Claims (6)

It is cushioning material on the foot side of footwear,
With an integral sponge from the heel part of the sole to the stepping part,
A sheet material that tightly seals the sponge from above and below with air.   A second region corresponding to a heel portion of the sole, a second region corresponding to a stepping portion of the sole, and a third region between the first region and the second region; The cushion material according to claim 1, wherein the width of the region is larger than the width of the first region, and the width of the third region is smaller than the width of the first region.   3. An insole for footwear comprising the cushion material according to claim 1 or 2 interposed between an insole bottom and a flexible insole covering the upper surface thereof.   The insole according to claim 3, characterized in that a cushion material accommodating recess having a depth substantially equal to half the thickness of the cushion material is formed on the upper surface of the insole bottom.   Footwear comprising the cushion material according to claim 1 on the foot contact side of a shoe sole. Footwear comprising the insole according to claim 3 or 4.

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