JP2002125705A - Sole of shoe - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide soles of boots used to perform a water work having a function that has a sufficient effect on stopping the soles from slipping even on a plain and smooth floor, wet with water. SOLUTION: The bottom face (a') of the sole (a) of the shoe composed of a soft synthetic resin or a rubber is formed in a plain and smooth shape. This bottom face (a') of the sole (a) is formed with the concave grooves a2 in rows, with the width of each concave groove at its open mouth part being made narrower than that of the same concave groove at the deepest part a22, so that the cross section is formed nearly upside-down trapezoid. The cross section of convex branches a1 formed between the concave grooves a2 is constituted to form nearly trapezoid so that the plain, smooth, and a large ground touching face a12 of the convex branches a1 sticks tightly to a floor C, and the edge parts a21 of convex branches are pressed closely against the floor C while walking, and the soles have a good effect on stopping the shoes from slipping.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shoe sole, and more particularly to a shoe sole used for working boots having water resistance and oil resistance.

[0002]

2. Description of the Related Art Conventionally, shoe soles used for boots and the like used when performing water work on a smooth concrete floor such as a kitchen or a gas station are wet with water, and furthermore, an oil film such as vegetable oil or lubricating oil is formed on the sole. An uneven pattern that extends in the width direction of the shoe is used so as to maintain the ground friction force, drainage function, and grip force on the floor and ground that have been made slippery. As the uneven pattern used for the sole of boots, relatively narrow grooves and convex parts are alternately arranged on the bottom surface of the sole, and fine irregularities are formed on the surface of the convex part that will be the ground contact part. Are often used.

[0003]

As described above, a certain degree of frictional force or the like can be exerted on the uneven pattern used in the conventional shoe sole or on concrete wet with water. However, there is a limit in the pattern that combines the uneven pattern and the rough surface finish, and the smooth finished concrete surface and the floor surface covered with floor panels etc. get wet,
Further, when an oil film or the like is generated, a sufficient anti-slip effect (frictional force or the like) cannot be exerted by the water and the oil film that wet the surface, and there is a risk of slipping and falling.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional circumstances, and is intended to provide a smooth concrete or floor panel for a shoe sole used for boots for performing water work on a floor or the like on which a water film or an oil film is formed. The present invention is to provide a function for exhibiting a sufficient anti-slip effect even when a smooth floor surface on which the floor is laid is slippery.

[0005]

In order to solve the above-mentioned problems, the shoe sole of the present invention is made of relatively soft rubber or soft synthetic resin, and has a smooth bottom surface. On this smooth bottom surface, a large number of concave grooves are formed in a concave shape in parallel. Since these concave grooves are formed such that the width of the opening is smaller than the width of the deepest part of the groove, the cross-sectional shape is substantially inverted trapezoid. In addition, when formed between the above-mentioned concave grooves, the cross-sectional shape of the ridge becomes a trapezoid.

As described above, when the cross-sectional shape of the groove is substantially inverted trapezoid, the width of the deepest portion of the groove can be widened and the width of the groove opening can be narrowed. In addition, the cross-sectional shape of the ridge formed between the concave grooves is necessarily substantially trapezoidal, and a wide smooth ground contact surface (shoe bottom) in contact with the floor surface can be secured.
Further, the width of the base end portion of the ground contact portion formed between the concave grooves is reduced, and the flexibility of the ridge can be improved. Therefore, at the time of use, the smooth contact surface of each ridge is in close contact with the floor surface via a large contact area, and at the same time, the ridge also bends in response to the bending of the shoe sole that occurs during walking, resulting in an acute angle. The edge of the contact surface that has become firmly pressed against the floor surface to ensure good grip. The description of the shoe sole according to the second and third aspects will be made together in the section of (Embodiments of the Invention).

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a boot A including the sole of the present invention. The boots A are molded using rubber or a relatively soft vinyl chloride resin or urethane resin, and the portion above the soles a is configured similarly to ordinary boots. 2 and 3 show a sole a of the boot A described above. The shoe sole a is injection-molded using a synthetic resin such as a vinyl chloride resin or rubber, or the like, and the bottom surface a ′ is formed into a smooth, preferably mirror-like shape. The bottom surface a 'of the sole a serving as the ground contact surface is divided into several blocks b.
Within each block b, concave grooves a2 are formed in parallel at predetermined intervals, and a relatively wide ridge a1 is formed between these concave grooves a2. That is, the ridge a1 protrudes with reference to the deepest portion of the concave groove a2 formed in the shoe sole a. Will do.

The ridge a1 and the groove a2 formed in the range of each block b disposed on the bottom surface a 'of the shoe sole a are:
There are a block formed so as to extend in the width direction of the sole a in the range of the block b, and a block formed in a slanted state in the range of the block b. a10 and the heel part a20 are arranged in a combined state (FIG. 2).

As described above, the concave grooves a2 formed at regular intervals on the bottom surface a 'of the shoe sole a are formed so that the cross section is inverted trapezoidal (FIG. 3). That is, each concave groove a2 has a shape in which the deepest part a22 is wide and the opening part a21 is narrow. Accordingly, each protruding ridge a1 formed between the concave grooves a2 has a substantially trapezoidal cross section in which the width on the base end side is narrow and the width on the ground contact surface a12 side is wide.

The ridges a1 and the grooves a2 configured as described above are formed in parallel at regular intervals.
1 are formed to be wide and the width of the concave groove a2 is formed to be narrow.
By the way, in the case of this embodiment, by setting the width of the opening a21 of the concave groove a2 to 2.5 mm and the width of the ridge a1 to 6 mm, a good anti-slip property could be realized. Further, as described above, by making the cross-sectional shape of the concave groove a2 substantially inverted trapezoidal, the cross-sectional shape of the ridge a1 formed between the concave grooves a2 can be necessarily made substantially trapezoidal. Floor C of concrete, etc.
The width of the smooth contact surface a12 in contact with the contact surface can be widened to increase the contact area.

Further, as described above, by forming the concave groove a2 into a substantially inverted trapezoidal cross section, the cross-sectional shape of the ridge a1 necessarily becomes substantially trapezoidal. As a result, the width of the base end part a11 of the ridge a1 formed between the concave grooves a2 becomes narrower, so that each ridge a1 can be given an appropriate flexibility. In use, the smooth and wide contact surface a12 of each ridge a1 eliminates a water film and an oil film covering the floor surface C (FIG. 4), and the contact surface a12 of each ridge a1 constituting the tread portion a10 has a large contact area. And directly adheres to the floor surface C through the interface (FIG. 5). Further, the water removed by the contact surface a12 of the ridge a1 instantaneously enters the groove a2 and is drained. Then, in correspondence with the bending of the shoe sole a generated at the shoe sole treading part a10 or the like during walking, the ridge a1 bends appropriately from the narrow base end part a11, and the edge of the sharp ridge a1 becomes an acute angle. The portion strongly contacts the floor surface C, and a good grip force can be secured (FIG. 6). By the way, the hardness of the resin or rubber constituting the above-mentioned shoe sole a is set to JIS A hardness 60. Normally, as a shoe sole of similar boots, one having a JIS A hardness of about 65 is an average value.
In order to improve the adhesiveness of the ridge a1 to No. 2 and the bendability of the ridge a1, the above-mentioned values were set daringly.

By the way, when the bottom surface a 'of the sole a is constituted by the ridge a1 having a substantially inverted trapezoidal cross section and the substantially groove-shaped groove a2 as described above, for example, the sole a is injection molded and removed from the mold. In this case, since the corresponding portion of the forming die that forms the concave groove a2 having a substantially inverted trapezoidal cross section has a gradient opposite to the draft angle provided in the normal forming die, it is difficult to remove the shoe sole from the forming die. Therefore, in the shoe sole a of the boots A of the present embodiment, the inclination angle α of the side surface of the ridge a1 constituting the side surface of the concave groove a2, that is, the virtual angle perpendicular to the ground plane a12 of the ridge a1 at the bottom surface a ′. When the angle between the line L and the side surface of the ridge a1 exceeds 0 °,
Good results are obtained when the angle is set to 15 ° or less, more preferably, more than 0 ° and 10 ° or less. Incidentally, in the case of the present embodiment, the inclination angle α is set to 5 ° (FIG. 3). By setting the inclination angle α of the side surface of the ridge a1 within the above range, it is possible to remove the ridge a1 of the shoe sole a molded in the molding die without applying an excessive load. .

On the bottom surface a 'of the sole a, a stepping part a10
In the range of each block b disposed on the heel portion a20, the ridges a1 and the concave grooves a2 are configured to be alternately arranged in parallel while maintaining parallelism. However, each block b has a horizontal pattern b1 in which the ridge a1 and the groove a2 extend in the width direction of the shoe sole a, and an inclined pattern b2 in which the ridge a1 and the groove a2 extend so as to be inclined at about 45 °. There is. For example, a sole a
Are arranged in a state where the horizontal pattern b1 and the inclined pattern b2 are combined (FIG. 3).

The portion where the lateral pattern b1 extending in the width direction of the sole a is formed is a stepped portion a which is bent every step during walking.
10 has good flexibility, but the transverse pattern alone results in excessive flexibility, and the base end portion a1 of the shoe sole a is changed over time.
Cracks may occur in 1st class. Therefore, in the shoe sole a of the present embodiment, the block b of the horizontal pattern b1
And the block b of the inclined pattern b2 are arranged in combination. As a result, while maintaining appropriate flexibility,
The generation of cracks can be prevented. The combination of the above patterns may be used for the heel part a20,
Thereby, side slip can be prevented.

FIGS. 4 to 6 show the space between the sole a and the floor C when walking while wearing the boots A. FIG. Shoe sole a
When the shoe touches the ground, the heel portion a20 of the shoe sole a touches the ground, and furthermore, the heel side portion of the tread portion a10 touches the ground (FIG. 4). At this time, the water film and the oil film on the floor surface C are repelled at the same time as the respective ridges a1 constituting the sole a and the bottom surface a ′ are grounded. When the water film and the oil film on the floor surface C are repelled by the bottom surface a ′, the tread portion a10 is perfectly adhered to the floor surface C and stops sliding (FIG. 5). Further, the water that has been blown out by the contact surface a12 of the ridge a1 enters the groove a2 and is drained instantaneously. Next, when stepping forward on the floor C while stepping on the floor a10 while bending, the ridges a1 contacting the floor C are appropriately bent from the narrow base end, and at the same time, the ground contact 12 The heel side edge is strongly pressed against the floor surface to exhibit good gripping properties (FIG. 6).
Although the above-described embodiment describes an example in which the sole is used as boots for boots, the sole of the present invention is not limited to the sole for boots, for example, gardening seeds, or indoor sports such as basketball shoes. May be used in shoes.

[0016]

As described above, the sole of the present invention is
Constructed using a relatively soft synthetic resin or rubber, etc., and formed in parallel with a substantially inverted trapezoidal concave groove on the bottom surface of the shoe sole which is formed smoothly, and a substantially trapezoidal cross section between these concave grooves Since the convex ridge is formed on the floor, a relatively soft, wide and smooth grounding surface is secured on the ridge in contact with the floor surface, and this grounding surface eliminates a water film and an oil film on the floor surface. It can be tightly adhered to a floor wet with water through a large ground contact area. Also, at the same time, in response to the bending deformation of the shoe sole that occurs during walking, the ridge is appropriately bent from the narrowed base end,
The contact surface of the ridge can be more securely brought into close contact with the floor surface, and the edge portion of the ridge contact surface, which forms an acute angle, can be strongly pressed against the floor surface to maintain good grip. As a result, even when walking on a smooth floor wet with water, due to the adhesion of the ridge, the drainage of the groove and the pressure of the edge,
Exhibits a good anti-slip effect not found in conventional shoe soles.

According to a second aspect of the present invention, the side surface of the ridge facing each of the grooves formed on the bottom surface of the sole is more than 0 ° and not more than 15 °, and the tip side of the ridge is the center of the groove. As a result, it is possible to maintain a good grip property as described above by forming a ridge having a substantially trapezoidal cross section between the concave grooves. In addition, when the ridge formed into a substantially trapezoidal cross section is taken out of the molding die after molding, it becomes difficult to remove the product due to a draft angle opposite to a normal one. By setting it within the range of 15 ° or less, the product can be released without damaging or damaging the product.

[0018] In the shoe sole according to the third aspect, the concave grooves provided side by side within the range of the tread portion on the bottom surface are inclined with respect to the lateral groove portion substantially in the width direction of the sole and the groove of the lateral groove portion. Since it is composed of an inclined groove portion, the inclined groove portion and the ridge on the stepping portion are formed only in the width direction of the sole, as in a normal shoe sole. Can exhibit a function of preventing excessive bending, and can prevent cracks from being formed in a stomach portion of a shoe sole while maintaining an appropriate bending property.

[Brief description of the drawings]

FIG. 1 is a perspective view showing boots provided with the sole of the present invention.

FIG. 2 is a bottom view of a shoe sole embodying the present invention.

FIG. 3 is a side view and a partially enlarged view of a bottom part of the shoe sole.

FIG. 4 is an enlarged vertical cross-sectional view showing a state where the soles of boots have started to touch the wet floor surface.

FIG. 5 is an enlarged longitudinal sectional view showing a state in which a tread portion of a shoe sole is in close contact with the floor surface.

FIG. 6 is an enlarged vertical sectional view showing a stepped portion when the user steps forward on the floor by stepping on the floor.

[Explanation of symbols]

 A: boots a: shoe sole a1: convex ridge a2: concave groove a11: base end a12: ground contact surface a ': bottom surface a10: stepping portion a20 ... Heel part a21 ... opening b ... block b1 ... horizontal pattern b2 ... inclined pattern C ... floor L ... virtual line α ... inclination angle (convex side surface)

Claims (3)

[Claims] 1. A sole of a shoe made of relatively soft rubber or soft synthetic resin is formed smoothly, and a number of grooves are formed in parallel on the bottom of the shoe. The width of the groove opening is formed so as to be smaller than the width of the deepest portion of the groove, the cross-sectional shape is substantially inverted trapezoid, and the cross-sectional shape of the ridge formed between these grooves is A shoe sole configured to be approximately trapezoidal. 2. The side surface of the ridge facing each groove formed on the bottom surface of the shoe sole is set to be more than 0 ° and 15 ° or less with respect to an imaginary line orthogonal to the bottom surface of the shoe sole. The shoe sole according to claim 1, wherein the sole is inclined toward the center of the concave groove. 3. A groove provided in parallel with the stepped portion on the bottom surface of the sole, a lateral groove portion substantially in the width direction of the sole, and
3. The shoe sole according to claim 1, comprising an inclined groove portion inclined with respect to the groove of the lateral groove portion.