JP2011254859A - Cushion sheet for metatarsal region - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problems wherein normal human foot skeletons normally have three arches, and wearing footwear with high heels, for example, for a long time compresses the transverse arch from the first metatarsal head to the fifth metatarsal head to cause calluses and resultant pains especially at the second metatarsal head and third metatarsal head on the sole, where pressure concentrates, and makes walking difficult.SOLUTION: A metatarsal cushion sheet 0101 includes a base 0102 to be disposed on a shoe sole side, first elastic projections 0103 arranged on a base surface or ground side surface of the base, and a decompression part 0108 disposed on the base surface and at least partly enclosed by the first elastic projections 0103. This can provide a decompression effect, can absorb walking shocks to enhance wearing comfort, and can enhance skid prevention.

Description

  The present invention relates to a footrest cushion sheet that is used by being placed on a shoe sole, and a shoe sole provided with the cushion sheet and a shoe.

  Usually, a human normal foot skeleton has three arches. The three arches are the medial longitudinal arch from the radius to the first metatarsal head, the lateral longitudinal arch from the radius to the fifth metatarsal head, and the first metatarsal head to the fifth metatarsal. It is a transverse arch over the bone head. These play an important role in providing a sense of stability when standing and absorbing landing impact pressure when walking.

  However, when holding a standing posture during standing work, for example, when wearing high-heeled footwear such as women's pump shoes with a heel of 3 cm or more for a long time, the heel portion is higher than the forefoot portion. Therefore, the weight load is concentrated on the forefoot, the lateral arch holding the foot skeleton is lowered, and the octopus (tako) on the second metatarsal head and the third metatarsal head on the sole where the pressure is particularly concentrated, And the pain accompanying it occurs, and the problem that it becomes difficult to walk during walking has arisen.

  In view of this, the applicant of the present application has proposed a sole for footwear characterized in that a pressure-reducing portion is provided at portions corresponding to the second metatarsal head and the third metatarsal head (Patent Document 1). . Furthermore, this document discloses that the surface is embossed to prevent slipping (see paragraph 0028).

However, in order to realize a more comfortable walking, it is desirable to improve the comfort by absorbing the impact during walking and to improve the slip resistance.
JP 2006-198084 A

  In order to solve the above problems, the applicant of the present application proposes the invention described below.

  That is, as a first invention, a base to be disposed on the shoe sole side, a first elastic protrusion disposed on a base surface that is a surface on the ground side of the base, and a first elastic protrusion disposed on the base surface. A cushion sheet for a stepping portion is proposed, which includes a pressure-removal portion surrounded by at least a part of the periphery.

  In addition, as a second invention, the cushioning sheet for a treading part according to the first invention is proposed in which the pressure-reducing part is composed of a flexible protrusion that is a protrusion made of a material softer than the first elastic protrusion.

    Further, as a third invention, the first elastic protrusion is composed of a frame part first elastic protrusion arranged in a frame part surrounding the pressure-reducing part, and other first elastic protrusions other than the frame part first elastic protrusion, The frame portion first elastic protrusion is proposed as a cushion sheet for a stepping portion according to the first invention or the second invention, which is relatively higher than other first elastic protrusions.

  As a fourth invention, a sole of a shoe provided with the cushioning sheet for a stepping portion according to any one of the first invention to the third invention is proposed.

  As a fifth invention, there is proposed a shoe provided with the cushioning sheet for a stepping portion according to any one of the first invention to the third invention.

  The footrest cushion sheet according to the present invention is decompressed at a position corresponding to the region of the sole corresponding to the second metatarsal head and the third metatarsal head of the foot, and in some cases, the fourth metatarsal head. It is appropriate to arrange and use so that the part is located.

  When appropriately arranged in this manner, the pressure applied to the second metatarsal head and the third metatarsal head of the foot, and in some cases, the area corresponding to the fourth metatarsal head can be dispersed and reduced. Therefore, it is possible to prevent the occurrence of wrinkles (octopus) and associated pain in this portion. Further, the slip resistance is improved.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In addition, this invention should not be limited to these embodiments at all, and can be implemented in various modes without departing from the gist thereof. The first embodiment relates to claims 1 to 5 and the like.
<< Embodiment 1 >>
<Embodiment 1: Overview>

  In the present embodiment, a stepping portion cushion sheet will be described, which has a pressure-removal portion surrounded by at least a part of the periphery by a first elastic protrusion. When the footrest portion cushion sheet of this embodiment is appropriately attached to the sole, the second metatarsal head and the third metatarsal head of the foot, and possibly the fourth metatarsal head, The decompression section is located at a position corresponding to the region.

FIG. 1 shows an example of a footrest cushion sheet according to the present embodiment. (A) is a bottom view of the footrest cushion sheet for women, (b) is a bottom view of the footrest cushion sheet for men, and (c) is a curve A− of the footrest cushion sheet of FIG. It is a schematic diagram which shows the mode of the cut surface at the time of cut | disconnecting by A ', In this figure, the cross section of the elastic protrusion mentioned later is typically shown.
<Embodiment 1: Configuration>

  The footrest cushion sheet (0101) according to the present embodiment includes a base (0102) disposed on the shoe sole side, a first elastic protrusion (0103), and a pressure-reducing part (0108).

  The footrest cushion sheet includes both a case where the shoe is a component part of a shoe attached in the shoe manufacturing process and a case where the user attaches the shoe to the shoe later.

    In addition, the cushion sheet of the present invention may be configured as a cushion sheet in a form distinguishable from shoes and shoe soles, and may be integrally formed with the shoe soles without boundary with the shoes and shoe soles. Is also included. Even in such a case, it is interpreted as the cushion sheet of the present invention, the shoe of the present invention, or the sole of the shoe of the present invention. In that case, the base surface is interpreted as pointing to the bottom of the shoe.

    In addition, even if shoes and shoe soles and cushion sheets are configured in a distinguishable form, they are not retrofitted in the shoe or shoe sole production process, but the shoe or shoe sole production process. It may be formed integrally with the shoe sole. Even in such a case, the part formed integrally is the cushion sheet referred to in the present invention, the shoe provided with this is the shoe referred to in the present invention, and the sole of the shoe provided with this is in the present invention. It is interpreted as the outsole of shoes.

  The “base” (0102) is a flat member disposed on the shoe sole side. In this figure, it is the part enclosed by the thick line. The thickness of the base is not particularly limited, but may be about 1 mm, for example. The base material is not particularly limited, but for example, the same as the first elastic protrusion described later, and it is preferable to form the base integrally because the possibility that the first elastic protrusion is removed is reduced.

  The cushion sheet for the treading portion of the present embodiment may be used by the user after being adhered to the shoe sole. In this case, if an adhesive is applied to the side of the base that adheres to the shoe sole, the bonding operation is easy.

  Drawing 2 is a figure for explaining the shape of the base of the cushion sheet for stepping parts of this embodiment. The shape of the base is not particularly limited, but the shape is similar to the toe side shape of the shoe sole (0201), and the size is slightly narrower than the width (0203) of the portion corresponding to the vicinity of the stepping portion (0202) of the shoe sole. Also good. In this case, when the user attaches, it is easy to determine the position where the shoe sole is attached, and since the bonding area is widened, it is possible to prevent the cushion sheet for the stepping portion from being displaced or peeled off during use.

  Refer to FIG. 1 again.

  The “first elastic protrusion” (0103) is disposed on the base surface. The base surface is a surface on the ground side of the base. In this figure, the first elastic protrusion is shown in gray (dark gray and light gray).

  The material of the first elastic protrusion is not particularly limited as long as it is a material having elasticity, such as rubber and foamed latex, but a material having high wear resistance is preferable because it can be used for a long time.

  The hardness of the first elastic protrusion is not particularly limited and can be designed according to the purpose of use, but is, for example, A40 to 60 / S, preferably A50 / S (when measured with a type A durometer according to JIS K 6253). Hereinafter, the numerical value is the same when the hardness is indicated in this specification.) If the ground is soft, the harder the first elastic protrusions will bite into the ground and exhibit an anti-slip effect. However, when walking on a hard ground such as a corridor or asphalt inside an office building, the first elastic projection is soft and the higher the frictional force with the ground, the better the anti-slip effect. In addition, a softer person can absorb the impact during walking, improving comfort. Therefore, considering these circumstances comprehensively, a preferable hardness was determined by an empirical rule.

  Reference is now made to FIG. This figure is a conceptual diagram for explaining the pressure-reducing part.

  As shown in (a) of this figure, in the cushioning sheet for stepping part (0301), the “pressure-reducing part” is arranged on the base surface that is the ground side surface of the base (0302), and the first elastic protrusion ( 0303) at least part of the periphery is surrounded. That is, in this figure, the decompression portion is a region surrounded by a dotted line 0304. In this figure, the first elastic protrusion is shown only in a portion surrounding the pressure-reducing portion.

  Surrounding at least a part of the periphery means that a first elastic protrusion described later is disposed so as to surround a part of the periphery of the pressure-reducing part. That is, for example, the first elastic protrusion may not be disposed on the heel side. As shown in (b) to (g) of this figure, a horseshoe shape (b), a triangle (c), a U-shape (d), or a square shape (e) may be used as long as at least a part of the periphery is surrounded. The shape ((f), (g)) with some gaps between the first elastic protrusions may be used. Furthermore, although not illustrated, the case where only the two sides of the toe side and the heel side are surrounded and the case where only the two sides of the foot are surrounded are included.

  The decompression unit corresponds to the second metatarsal head and the third metatarsal head of the foot, and, in some cases, the fourth metatarsal head when the footrest cushion sheet of the present embodiment is appropriately attached. This corresponds to the region of the shoe sole. This will be described below with reference to the drawings.

  FIG. 4 is a diagram for explaining the correspondence between the foot and the footrest cushion sheet of the present embodiment. In the footrest portion cushion sheet (0401) of the present embodiment, the decompression portion (0403) is a shoe sole region corresponding to the second metatarsal head (0404) and the third metatarsal head (0405) of the foot. Corresponds to (0406). 0406 indicates a portion indicated by a black dotted line. In this figure, only a part of the first elastic protrusion (0402) is shown. Moreover, the light gray dotted line has shown the shoe sole (0407). Although not shown, the region of the decompression unit may further extend to a region corresponding to the fourth metatarsal head.

  The pressure-removal part is surrounded by at least a part of the periphery by the first elastic protrusion. Thereby, for example, when a protrusion is not arranged in the pressure-removal portion or a protrusion lower than the first elastic protrusion is arranged, the pressure-removal portion has a concave shape relative to the ground. In this case, when pressure is applied to the area corresponding to the pressure-removal part during walking, the area corresponding to the pressure-removal part in the base gradually deforms into a convex shape toward the ground. The pressure applied to the second and third metatarsal heads of the corresponding foot, and in some cases, the fourth metatarsal head is further reduced.

  As will be described later, in the footrest portion cushion sheet of the present embodiment, a flexible protrusion, which is a protrusion made of a material softer than the first elastic protrusion, may be disposed in the pressure-removal portion. In this case, the flexible protrusion is deformed with a smaller pressure than the first elastic protrusion. In this case, when pressure is applied to the region corresponding to the pressure-removal portion during walking, the flexible protrusion deforms with less force, so that the second metatarsal head of the foot corresponding to the pressure-removal portion during walking and the second The pressure applied to the third metatarsal head, and possibly the fourth metatarsal head is further reduced.

    That is, “pressure release” means that the pressure can be reduced as compared with the case where the stepping portion cushion sheet of the present embodiment is not used.

  Here, description will be made with reference to FIG. 1 again.

  As shown in this figure, a large number of first elastic protrusions may be arranged in a wide area up to the toe side. This is because the impact during walking can be dispersed and absorbed over a wide area.

  The first elastic protrusions described above may have different heights. That is, the first elastic protrusion (0103) includes a frame part first elastic protrusion (0106) disposed in a frame part surrounding the pressure-reducing part, and other first elastic protrusions (0107) other than the frame part first elastic protrusion. Consists of. The height of the protrusion is based on the base surface, and the frame part first elastic protrusion is about 1 mm to 3 mm, preferably around 2 mm, for example, about 2.17 mm from the base surface, and the other first elastic protrusion is The height is about 0.5 mm to 1.5 mm from the base surface, preferably about 1 mm, for example, about 1.0 mm.

  In this case, the relatively high frame portion first elastic protrusion is grounded first. At that time, the frame portion first elastic projection is bent to absorb the impact. When the frame portion first elastic protrusion is bent and the base surface and the ground approach, the other first elastic protrusion is grounded and the other first elastic protrusion is bent. In this case, when only the first elastic projection of the frame part is in contact with the ground, the ground contact area is relatively small, and each projection receives a strong pressure, resulting in a large deflection. There will be a small deflection. That is, since a buffering effect can be obtained step by step during walking, a comfortable walking as if walking on a carpet can be realized.

  In this figure, the frame portion first elastic protrusion is a portion (0106) shown in dark gray, and the other first elastic protrusion is a portion (0107) shown in light gray. As shown in this figure, the frame portion first elastic protrusions may be arranged in a number of triangles with thin toes. In this case, the following effects are obtained.

  In other words, when walking, the first elastic projection of the frame portion arranged on the toe side will gradually come into contact with the ground, but since the toe side is arranged in a thin triangle shape, the area of newly contacting the ground will gradually decrease I will do it. On the other hand, since the load is dispersed as the ground contact area increases, the load applied to the newly grounded region decreases. As a result, the pressure applied to the first elastic projection of the frame part in the newly grounded area is substantially constant from the start of grounding until the grounding area is maximized, and an average amount of deflection can be achieved uniformly and comfortable. Walking can be realized.

  In addition, the individual shape of the first elastic protrusion is not particularly limited. More preferably, it has a substantially conical shape or a substantially truncated cone shape. When walking and landing, it absorbs shocks due to its elasticity, and when it receives heavy pressure due to weight movement, the ground contact area between the protrusion and the ground becomes wide, and it can fully demonstrate the anti-slip effect due to friction Because it can. In addition, the substantially conical shape or the substantially frustoconical shape has a strong bending elasticity even when a force to bend and bend from the lateral direction is applied during walking. Hard to give.

  In the footrest portion cushion sheet in the present embodiment, the pressure-removal portion may further be configured by a flexible protrusion that is a protrusion made of a material softer than the first elastic protrusion.

  The shape of the flexible protrusion is not particularly limited. If it is cylindrical, it will bend evenly, so you can realize a comfortable walk like walking on a carpet. The material of the flexible protrusion is not particularly limited as long as it is a material having elasticity, such as rubber and foamed latex, but a material having high wear resistance is preferable because it can be used for a long time.

  In the case where the flexible protrusion is provided, the impact at the time of landing can be dispersed and absorbed in a wide area including the pressure-reducing portion, so that comfortable walking can be realized.

  Moreover, it is good also as a structure provided with a some 2nd elastic protrusion relatively lower than a 1st elastic protrusion instead of a flexible protrusion. The second elastic protrusion is a portion indicated by 0104 in FIG. 1 and indicates a white circle in FIGS.

  By providing the second elastic protrusion, it is possible to prevent the foot from feeling like a skid. That is, when a force is applied to the first elastic protrusion from a direction other than the longitudinal direction, the first elastic protrusion does not bend uniformly, but is bent in a distorted form in an oblique direction or a lateral direction. It will give the foot a feeling of skidding. However, since the second elastic protrusion is grounded and supports the load together with the first elastic protrusion, after the second elastic protrusion is grounded, the first elastic protrusion can be prevented from further bending in a distorted form, and thus slipped. Such a feeling can be prevented from being given to the foot.

  The height of the second elastic protrusion is not particularly limited, but on the basis of the base surface, it is about 0.2 mm to 1.2 mm from the base surface, preferably about 0.7 mm, for example, about 0.68 mm. And so on.

  Further, the individual shape of the second elastic protrusion is not particularly limited. However, in order to prevent the foot from feeling like skidding as described above, the larger the diameter, the greater the resistance to the force to bend in a laterally distorted form. preferable. More preferred is a bowl shape. The material and hardness of the second elastic protrusion are the same as those described for the first elastic protrusion.

  Moreover, it is good also as a structure further equipped with the 3rd elastic protrusion lower than the 1st elastic protrusion arrange | positioned in the outermost periphery area | region among the protrusions arrange | positioned at a base surface. The third elastic protrusion is a portion indicated by 0105 in FIG. 1, and in FIGS. 1A and 1B, the third elastic protrusion indicates a circled portion with “·” at the center. The third elastic protrusion serves to prevent the foot from feeling like a skid due to the first elastic protrusion being bent in a distorted form by the same function as the second elastic protrusion.

  The relative height between the third elastic protrusion and the second elastic protrusion is not limited, and may be the same height as the second elastic protrusion, for example. Moreover, the individual shape of the third elastic protrusion is not particularly limited. However, in order to prevent the foot from feeling like skidding as described above, the larger the diameter, the greater the resistance to the force to bend in a laterally distorted form. preferable. More preferred is a bowl shape. The material and hardness of the third elastic protrusion are the same as those described for the first elastic protrusion.

  Furthermore, it is good also as the outsole of shoes provided with the cushion sheet for stepping parts of this embodiment.

Furthermore, it is good also as a shoe provided with the cushion sheet for stepping parts of this embodiment.
<Embodiment 1: Effect>

  The footrest cushion sheet according to the present invention is decompressed at a position corresponding to the region of the sole corresponding to the second metatarsal head and the third metatarsal head of the foot, and in some cases, the fourth metatarsal head. It is appropriate to arrange and use so that the part is located.

  When appropriately arranged in this manner, the pressure applied to the second metatarsal head and the third metatarsal head of the foot, and in some cases, the area corresponding to the fourth metatarsal head can be dispersed and reduced. Therefore, it is possible to prevent the occurrence of wrinkles (octopus) and associated pain in this portion. Further, the slip resistance is improved.

An example of a conceptual diagram of a cushion sheet for a stepping portion according to Embodiment 1 The figure for demonstrating the shape of the base of the cushion sheet for stepping parts of Embodiment 1 The figure for explaining the decompression part The figure explaining the correspondence between the foot and the cushion sheet for the stepping part of the first embodiment

Cushion sheet for stepping part 0101, 0301, 0401
Base 0102, 0302
First elastic protrusion 0103, 0303, 0402
Second elastic protrusion 0104
Third elastic protrusion 0105
Frame part first elastic projection 0106
Other first elastic protrusions 0107
Decompression unit 0108, 0304, 0403
Shoe sole 0201, 0407
Near the tread of the shoe sole 0202
Width of the part corresponding to the vicinity of the tread part of the sole
Second metatarsal head 0404
Third metatarsal head 0405

Claims (5)

A base to be placed on the sole side,
A first elastic protrusion disposed on a base surface which is a surface on the ground side of the base;
A pressure-removal part disposed on the base surface and surrounded by at least a part of the periphery by the first elastic protrusion;
Cushion seat for treading part consisting of The cushioning sheet for a treading part according to claim 1, wherein the pressure-removal part is composed of a flexible protrusion that is a protrusion made of a material softer than the first elastic protrusion. The first elastic protrusion is a frame part first elastic protrusion disposed on a frame part surrounding the pressure-reducing part,
The cushion sheet for a stepping part according to claim 1 or 2, comprising a first elastic protrusion other than the first elastic protrusion of the frame part, and the first elastic protrusion of the frame part is relatively higher than the other first elastic protrusion. The sole of the shoe provided with the cushion sheet for stepping parts as described in any one of Claim 1 to 3. A shoe provided with the cushion sheet for a stepping part according to any one of claims 1 to 3.