JP2000102402A - Spiked shoe bottom - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the deformation of a she bottom due to projecting parts such as a spike pin and a grounding projection. SOLUTION: This shoe bottom is provided with an outer sole 3 projectingly provided with projecting parts such as a spike pin 5a and a grounding projection 5b on the lower surface of a stepping part. In the case, on the upper surface or at a position near the upper surface of a front stepping part projectingly provided with the projection parts of the sole 3, a reinforcing sheet 4 formed by more rigid material than an outer sole forming material is integrally layer- formed. A through hole penetrating in the vertical direction is provided at the reinforcing sheet.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a spiked shoe sole.

[0002]

2. Description of the Related Art In general, a shoe sole is made of a shoe body by sticking a torso rubber from the upper side to a backing cloth formed so as to cover the instep portion and side surfaces of the shoe. Attach the inner sole (insole) to the bottom inner surface, attach the midsole made of resin foam, etc. to the bottom outer surface of the shoe body, fold the peripheral edge of the trunk rubber on the lower surface of the midsole, and superimpose, An outer sole (ground bottom) is attached from above the folded rubber trunk and midsole.

A shoe sole disclosed in Utility Model Registration No. 2531232 is used for shoes such as running, jogging, and training. It is formed by sticking a shank part made of thermoplastic synthetic resin with sticks, and sticking the outer sole only to the front tread portion and the heel tread portion excluding the non-step portion, thereby forming the sole of the shoe sole. The aim is to reduce the weight and prevent deformation to prevent wearer fatigue.

[0004] However, shoes such as fishing surf boots and the like in which a spike pin or a grounding projection is provided on the lower surface of a tread portion of an outer sole may fly or walk on a rugged place such as a rocky shore. Then, there is no big problem because there is a certain thickness in the heel stepping part of the outer sole, but in the thin front stepping part, the projection of the spike pin and the grounding projection is inside the shoe together with the midsole. There is a problem that the foot is deformed and pressed against the sole of the foot. Such deformation of the protruding portion of the shoe sole makes the comfort very poor and causes fatigue of the shoe wearer.

To prevent this, it is conceivable to increase the thickness of the front tread portion of the outer sole or to form the outer sole with a hard material. However, in this case, the outer sole is formed at the boundary between the toes and the instep. As a result, the wearer does not bend freely, so that the wearer's jumping and walking movements are hindered and fatigue is forced. In addition, according to the means of thickening the front tread portion of the outer sole of the former, the weight of the shoe increases and the fatigue of the shoe wearer is further increased, and the latter is made of a hard material. The means of forming has a problem that it causes slippage and wear of the grounding projection.

As another preventive measure, it is conceivable to connect the projecting portions of the spike pins and the grounding projections to each other with ribs. However, this also cannot prevent the soles from being compressed. The weight increases, causing fatigue of the shoe wearer.

Further, it is conceivable to attach a rigid bottom plate integrally formed with a protruding portion to the bottom surface of the outer sole like a spike shoe for baseball. However, it is necessary to increase the strength of the bottom plate to prevent damage to the bottom plate. The higher the height, the more the boundary between the toes and the upper part does not bend freely, making it easier for the wearer to get tired, and the bottom plate peeling off from the bottom of the outer sole, sand or water in the peeled gap However, there is a problem that infiltration accelerates deterioration.

[0008]

Means for Solving the Problems In order to solve the above problems, the invention according to claim 1 comprises a midsole (2) attached to the bottom of a shoe body, and an affixed to the bottom of the midsole (2). At least a spike pin (5
a) and an outer sole (3) provided with a protruding portion such as a grounding protruding portion (5b), at least a front tread portion provided with the protruding portion of the outer sole (3). A spike shoe in which a reinforcing sheet (4) formed of a material having higher rigidity than the material forming the outer sole (3) and having a through hole (11) in the vertical direction is integrally laminated at or near the upper surface. Adopt the bottom.

Further, in the invention according to claim 2, the reinforcing sheet (4) is layered except for the contact position at the boundary between the toe and the instep of the front tread portion. The spike shoe sole described in 1 is adopted.

According to a third aspect of the present invention, there is provided the spiked shoe according to the first or second aspect, wherein a hoisting piece (12) is provided to project upward at least at a wide portion on both side edges of the reinforcing sheet (4). Adopt the bottom.

According to a fourth aspect of the present invention, there is provided the spike shoe sole according to any one of the first to third aspects, wherein the reinforcing sheet (4) is made of a fabric such as nylon, tetron, polyester, or cotton.

According to a fifth aspect of the present invention, the reinforcing sheet (4) heats and cures a prepreg sheet in which a thermosetting synthetic resin is impregnated with reinforcing fibers such as glass and carbon, and a through hole (11) is formed in a vertical direction. The spiked shoe sole according to any one of claims 1 to 3, which is a plate-like body formed with the following.

[0013]

Next, embodiments of the present invention will be described with reference to the drawings.

<Embodiment 1> As shown in FIG. 1, a spike shoe sole of this fishing surf shoe has an inner sole 1 adhered to the inner surface of the bottom of the shoe body, and an inner sole 1 adhered to the bottom of the shoe body. A midsole 2, an outer sole 3 attached to the bottom of the midsole 2, and a reinforcing sheet 4 sandwiched between the midsole 2 and the outer sole 3. Projections such as spike pins 5a and grounding projections 5b are protrudingly provided on the lower surface of the tread portion of the outer sole 3.

The spike sole of this shore shoe is formed by the following steps.

First, a tricot, a jersey, and a last (not shown) formed according to the outer shape of various feet are provided.
Put a backing cloth 6 made of cotton or the like. After the last is removed, the backing cloth 6 has a cavity having a size and a shape surrounding the part including the toes, the instep, the heel, and the like.

Next, a midsole 2 made of neoprene, foam rubber or the like is attached to the bottom of the backing cloth 6 with a rubber-based adhesive.

A body rubber 7 made of a compound rubber such as natural rubber, ethylene propylene rubber, or styrene butadiene rubber is adhered to a portion of the backing cloth 6 corresponding to the upper part and the side of the foot.

A reinforcing rubber, a decorative member, and the like (not shown) are attached to the outside of the trunk rubber 7.

The outer sole 3 made of a compounded rubber such as butadiene rubber, nitrile rubber, or isoplane rubber is attached to the midsole 2 and the trunk rubber 7 folded on the midsole 2 by a manufacturing method described later. . Thereby, the spike soles are formed on the shore shoes as shown in FIG.

The entire shore shoe to which the spiked shoe sole is stuck is placed in a pressure cooker (not shown), heated, pressurized, vulcanized, and cured. As a result, the shore shoe is completed.

Next, the manufacture of the outer sole 3 will be described with reference to FIG.

First, a spike pin 5a is mounted on a predetermined position of the lower die 8, and a reinforcing sheet 4 coated with raw rubber diluted with a solvent is positioned and mounted on the upper die 9. Next, after a predetermined amount of the compounded rubber mass 10 is loaded into the lower mold 8, the upper mold 9 is charged.
Then, the upper and lower dies 9, 8 are set in a press (not shown), and heated, pressed, and vulcanized to cure the rubber.

As a result, projections such as spike pins 5a and grounding projections 5b are formed on the outer sole 3 on the lower surface of the stepped portion. Further, the reinforcing sheet 4 is integrally formed on the upper surface of the outer sole 3.

The reinforcing sheet 4 is formed of a material having a higher rigidity than the material forming the outer sole 3, and as shown in FIGS.
Having. The reinforcing sheet 4 can be layered over the entire surface of the outer sole 3, but at least the upper surface of the front tread portion on which the projections including the spike pins 5 a and the grounding projections 5 b of the outer sole 3 are provided. Alternatively, the layers may be integrally formed at a position near the upper surface. In this embodiment, as shown in FIG. 2, the outer sole 3 is provided at a portion other than a stepped portion.

The reinforcing sheet 4 may be flat, but as shown in FIGS. 3 and 4, at least a wide portion on both side edges is provided with a raised piece 12 projecting upward. There may be.

As the reinforcing sheet 4, a prepreg sheet in which a thermosetting synthetic resin is impregnated with reinforcing fibers such as glass and carbon is cured by heating to form through holes 11 in the vertical direction as shown in FIGS. An FRP plate can be used. The reinforcing sheet 4 is heat-cured by impregnating a thermosetting resin such as epoxy or phenol into a woven fabric plain-woven with monofilaments, single yarns or twin yarns of reinforcing fibers such as glass or carbon. It is made by cutting the plate-like body thus formed into a predetermined shape and at the same time making a through hole in the vertical direction.

As the fibers of the reinforcing sheet 4, those having the same fineness and density of the warp yarns 13a and the weft yarns 13b as shown in FIG. 3 are desirable for uniformly dispersing the deformation force. In addition, it is desirable that one of the warp yarn 13a and the weft yarn 13b of the fiber is aligned with the front and rear direction of the sole. In addition, it is desirable that the surface of the reinforcing sheet 4 be subjected to a known surface treatment in order to enhance the adhesion with the material for forming the outer sole 3.

Since the shore shoe thus produced includes the reinforcing sheet 4 in its spiked shoe sole, even when walking on a rugged place, the base of the projections 5a and 5b is closer to the shoe. And the projections 5a and 5b do not fall down.

<Embodiment 2> As shown in FIG. 6, in this spiked shoe sole, the reinforcing sheet 4 is provided except for the contact position of the boundary between the toe and the instep of the front tread portion. Stratified,
As shown in FIGS. 7 and 8, a reinforcing sheet 4 is formed on the upper surface of the stepped portion and the non-stepped portion of the outer sole 3 excluding the toe portion and the heel portion.

On the lower surface of the tread portion of the outer sole 3, as in the first embodiment, the spike pins 5a,
Protrusions such as the ground protrusions 5b are protruded.

As the reinforcing sheet 4, monofilaments, single yarns (without twist), and twin yarns (with twist) of synthetic fibers such as nylon, tetron, polyester or natural fibers such as cotton, and twin yarns (with twist) are satin weave, plain weave, What is formed into a woven fabric by a perforated plain weave and cut into a predetermined shape is used. The through holes 11 (see FIGS. 2 to 4) in the first embodiment to be provided in the reinforcing sheet 4 are the fibers 1 of the woven fabric.
Although it is obtained as a gap between the four, it is desirable to adopt a plain weave which is easy to have a gap between the fibers 14 from the viewpoint of appropriately forming a through hole corresponding to the through hole 11. In addition, it is desirable to perform a known surface treatment on the surface of the reinforcing sheet 4 in order to enhance the adhesion to the material for forming the outer sole 3.

Incidentally, in the first and second embodiments, the specific elastic modulus of the reinforcing sheet alone with respect to rubber is as shown in Table 1. The specific elastic modulus of the rubber with respect to the elasticity of 1.0 is 4.2 for nylon fiber woven fabric and polyester. The fiber woven fabric is 8.7, the glass fiber and phenolic resin FRP board material is 8.9,
FRP board made of carbon fiber and epoxy resin is 37.5
It is. As the reinforcing sheet 4, it is desirable that the specific elastic modulus of the reinforcing sheet alone with respect to rubber is several times.

[0034]

[Table 1]

The change in the rigidity of the outer sole 3 reinforced by the reinforcing sheet 4 is as shown in Table 2, and the thickness of the outer sole 3 is 3 mm.
The ratio to a rubber plate having a thickness of 3 mm is 2.3 when a single 250 g / m 2 polyester fiber plain woven material is deposited on the upper surface of a rubber plate having a thickness of 3 mm. Woven with a basis weight of 180g and a plain weave of 32
2.9 weight% of a phenolic resin impregnated with a phenolic resin and then heat-cured to form a welded layer of one plate with a large number of holes. 9.7 is the case where one sheet material having a large number of holes is formed by welding after impregnating with 30% by weight of an epoxy resin and curing by heating.

[0036]

[Table 2]

[0037]

According to the first aspect of the present invention, a material having higher rigidity than the material forming the outer sole is provided at least on the upper surface of the front tread portion or the position close to the upper surface where the protrusion of the outer sole is projected. Since the reinforcing sheet having through holes in the vertical direction formed by the above is integrally layered, even if it flies or jumps in places with severe undulations, the base of the projection deforms and protrudes inside the shoe and the foot The sole of the shoe does not locally compress the sole, and the sole always keeps a shape following the sole of the foot, thereby preventing the wearer of the shoe from fatigue. Further, the projection does not fall down due to the deformation.

Further, the reinforcing sheet is formed by laminating a thin member having higher rigidity than the material forming the outer sole on the upper surface or the intermediate layer close to the outer sole as a part of the outer sole, so that the weight of the shoe does not increase. Further, since the physical properties of the outer sole are not affected, the outer sole is easily curved at the boundary between the toes and the instep, and does not hinder the wearer's exercise.

Further, since the reinforcing sheet is integrally formed on the upper surface of the outer sole or an intermediate layer close to the upper surface through a through hole, the reinforcing sheet is prevented from peeling off from the outer sole, and sand or water is prevented from coming off. Deterioration due to intrusion can be prevented.

According to the second aspect of the present invention, the reinforcing sheet is layered except for the abutting position at the boundary between the toe and the instep of the front tread portion. Without compromising the curvature of the bottom,
And since the reinforcing sheet is layered before and after this part,
There is no deformation of the projection into the shoe.

According to the third aspect of the present invention, since the roll-up pieces are projected upward at least at the wide portions on both side edges of the reinforcing sheet, the inside of the shoe is formed on the inclined surface which is inclined laterally with respect to the walking direction. Even if the foot slides to the side, the feet are stabilized, so that fatigue of the shoe wearer can be prevented.

According to the fourth aspect of the present invention, since the reinforcing sheet is made of a woven fabric such as nylon, tetron, polyester, or cotton, the outer sole forming material enters the gap between the weft and the warp of the woven fabric and is integrated with the outer sole. Thus, the shoe sole can be hardened and hardly peeled off and has excellent durability. In addition, since a commercially available net obtained by cutting a net can be used as the reinforcing sheet, it can be manufactured at low cost without requiring a special device.

According to the fifth aspect of the present invention, the reinforcing sheet is a plate-like sheet formed by heating and curing a prepreg sheet in which a thermosetting synthetic resin is impregnated with reinforcing fibers such as glass and carbon to form vertical through holes. Since it is a body, the outer sole forming material enters the through-hole and is integrated with the outer sole, so that the hardness can be further increased as compared with the case of a woven fabric, and deformation during walking can be prevented.

[Brief description of the drawings]

FIG. 1 is a partially cutaway view of a surf shoe having a spike sole according to the present invention.

FIG. 2 is a longitudinal sectional view of a mold showing a manufacturing process of the outer sole, and is a view corresponding to the direction of line II-II in FIG.

FIG. 3 is a schematic diagram viewed in the direction of line III-III in FIG. 1;

FIG. 4 is a sectional view taken along line IV-IV in FIG. 3;

FIG. 5 is an enlarged sectional view of a reinforcing sheet in FIG.

FIG. 6 is a schematic view similar to FIG. 2, showing a spiked shoe sole according to another embodiment of the present invention.

7 is a sectional view taken along the line VII-VII in FIG.

FIG. 8 is an enlarged sectional view of the reinforcing sheet in FIG. 7;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 2 ... Mid sole 3 ... Outer sole 4 ... Reinforcement sheet 5a ... Spike pin 5b ... Grounding projection 11 ... Through hole 12 ... Winding piece

Claims (5)

[Claims] 1. A midsole attached to a bottom of a shoe main body, and an outer sole having a projection such as a spike pin, a grounding projection or the like protruding from at least a lower surface of a tread portion attached to the bottom of the midsole. In the spiked shoe sole having the upper sole, the upper sole is formed of a material having a higher rigidity than the outer sole forming material, at least on the upper surface of the front tread portion or the position close to the upper surface where the protrusion of the outer sole protrudes. A spiked shoe sole, wherein a reinforcing sheet having a through hole in a direction is integrally laminated. 2. The spiked shoe according to claim 1, wherein the reinforcing sheet is layered except for a contact position between a toe portion and a toe portion of the front tread portion. bottom. 3. The spiked shoe sole according to claim 1, wherein a roll-up piece protrudes upward from at least wide portions of both side edges of the reinforcing sheet. 4. The method according to claim 1, wherein the reinforcing sheet is nylon, tetron,
The spike sole according to any one of claims 1 to 3, wherein the spike sole is made of a fabric such as polyester or cotton. 5. The reinforcing sheet is a plate-like body in which a prepreg sheet in which a thermosetting synthetic resin is impregnated with a reinforcing fiber such as glass or carbon is heat-cured to form a through-hole in a vertical direction. The spiked shoe sole according to any one of claims 1 to 3, wherein