CN117042648A - Working shoes - Google Patents

Abstract

The application provides a pair of work shoes which can stably obtain high anti-skid performance, are light in weight and are easy to walk. A work shoe (1) is provided with an upper (2) and an outsole (3), wherein the outsole (3) has a base (31) joined to the bottom of the upper (2) and a block design (32) formed on the bottom surface of the base (31). In the work shoe (1), the thickness of the base (31) of the outsole (3) is uniformly formed over substantially the entire surface, and the heel (12) of the upper bottom (21) is provided with a hollow structure (22). The hollow structure (22) has an upper opening and thick wall portions (23, 24) formed on a part of the bottom surface.

Description

Working shoes

Technical Field

The present application relates to a work shoe using a sole capable of suppressing slipping caused by water, oil, or the like, for example.

Background

In most cases, water, oil, and other slippery liquids adhere to floors in food processing plants, kitchens in eating houses, and the like, and may slip when the user walks during the operation. Therefore, it is preferable to use a work shoe having a sole with high slip resistance, which can suppress slipping caused by water, oil, or the like, for a worker who works in such a place where slipping is likely to occur.

Conventionally, as a structure for improving the slip resistance of soles provided in such work shoes, there is known a sole in which the hardness of a ground contact portion is defined and a plurality of block designs formed by projections and depressions provided on the ground contact portion are defined (for example, refer to patent document 1).

In addition, there is also known a sole including an outsole and a midsole, wherein the outsole has a block design formed of a plurality of irregularities of a predetermined shape; the midsole has a hardness equal to or higher than that of the outsole (for example, refer to patent document 2).

Prior art literature

Patent literature

Patent document 1: japanese patent laid-open No. 2000-106903

Patent document 2: japanese patent laid-open No. 2002-165607

Disclosure of Invention

Problems to be solved by the application

However, in the conventional sole structure, the bottom thickness of the outsole is not constant from the top (toe portion) to the rear (heel portion), and particularly, the bottom thickness gradually increases from the tread portion to the heel portion, so that the individual blocks of the sole cannot be uniformly pressed, and the anti-slip effect is not stable.

In view of the above, an object of the present application is to provide a safe work shoe which can stably obtain high slip resistance, is lightweight, and is easy to walk.

Means for solving the problems

In order to achieve the above object, the present application provides a work shoe comprising an upper and an outsole, wherein the outsole has a base portion joined to a bottom portion of the upper and a block design formed on a bottom surface of the base portion, the work shoe is characterized in that a wall thickness of the base portion of the outsole is uniformly formed on substantially the entire surface, the base portion of the outsole is formed to be equal to or thinner than a wall thickness of a bottom portion of the upper, a hollow structure portion is provided in a heel portion of the bottom portion of the upper, an upper portion of the hollow structure portion is opened, and the hollow structure portion has a thick wall portion formed on a part of the bottom surface.

The present inventors have conducted comparative experiments using 3-color molded articles composed of an upper, a midsole, and an outsole and 2-color molded articles composed of an upper and an outsole for the purpose of further improving slip resistance by using the anti-clogging sole of japanese patent No. 5222431 proposed by the present inventors, and have obtained the following results.

That is, the total thickness of the soles was the same, but the thickness of the heel portion of the outsole of the 3-color molded article was 9mm, and the thickness of the heel portion of the outsole of the 2-color molded article was 23.5mm. When the dynamic friction coefficients of both were measured, the dynamic friction coefficient of the 3-color molded article was about 0.41,2 and the dynamic friction coefficient of the molded article was about 0.28.

From this, it was found that a shoe having a heel thickness of 9mm was excellent in body feeling slip resistance with respect to a shoe pad having a heel thickness of 23.5mm, and even more excellent in slip resistance when the heel thickness of the outsole was thin.

The present application has been completed based on the above knowledge, and can provide a sole comprising: by uniformly forming the thickness of the base portion of the outsole over substantially the entire surface, the thickness of the heel portion of the outsole can be easily made thinner, and high slip resistance can be stably obtained.

However, when the heel has a certain height in terms of the height of the heel, the center of gravity is more easily moved forward, and the user can walk forward more easily.

However, if the heel height is too high, the sole of the foot may be in a tense state, causing a great stress on the foot, and possibly deteriorating walking efficiency. In addition, if the heel height is too low, the weight may concentrate on the heel, possibly causing fatigue. In this way, the heel height serves to distribute body weight to various parts of the sole and to achieve an averaging. Accordingly, as the upper in consideration of ease of walking, fatigue reduction, comfort, and safety of the work shoe, it is preferable to set a heel tolerance of an average of 10mm to 15mm for the distance from the tread portion to the heel portion of the work shoe.

For example, in order to set a heel tolerance for a work long shoe and to uniformly set the thickness of the outsole to be thin as a whole, the thickness of the heel portion of the bottom of the upper must be set to be thick. However, when the heel portion of the bottom portion of the upper is made thicker, the cooling of the upper becomes worse in the process of injection molding the outsole after injection molding the upper, and good molding results cannot be obtained.

Therefore, in the present application, by providing the hollow structure portion at a position corresponding to the heel portion of the bottom portion of the upper, the thickness of the outsole can be made uniform while maintaining the heel height, and the entire surface can be uniformly pressed, thereby improving the slip resistance. Further, the hollow structure can be used to reduce the weight.

Further, it is preferable that the hollow structure portion of the upper bottom portion includes: a first thick portion in a lattice shape, which stands up as the thick portion from the bottom surface of the hollow structure portion; and a second thick portion in a lattice shape protruding from the bottom surface of the inner side divided by the first thick portion.

The heel of the work shoe is a contact start portion during walking and is also a portion to which a load is applied during standing work, and therefore, when the work shoe is pressurized, excessive pressure is applied to cause the wall thickness to become too thin, and design deformation is excessive, so that slipping is likely to occur.

Therefore, by providing the first thick wall portion and the second thick wall portion in a lattice shape in the hollow structure portion at the bottom of the upper, the compression of the hollow structure portion can be restricted to prevent extreme deformation of the block design, and therefore, the resistance against the traveling direction can be improved, and the slip resistance can be improved.

Drawings

FIG. 1 is an illustrative cross-sectional view of a work shoe of a positional embodiment of the present application.

Fig. 2 is an explanatory cross-sectional view of the hollow structure portion in the present embodiment.

Fig. 3 is an explanatory plan view of the hollow structure portion in the present embodiment.

Detailed Description

An embodiment of the present application will be described based on the drawings. The work shoe 1 of the present embodiment is a long shoe formed by injection molding, and includes an upper 2 and an outsole 3 as shown in a cross section in fig. 1. The upper 2 and the outsole 3 are formed by two-color molding. Although not shown, a flat insole is used as the insole.

The upper 2 includes a bottom 21, and an outsole 3 is provided on a lower surface of the bottom 21. The outsole 3 includes a base 31 joined to the bottom 21 of the upper 2, and a plurality of projections 32 constituting a block design formed below the base 31.

As described above, the work shoe 1 of the present embodiment includes the sole composed of the bottom 21 of the upper 2 and the outsole 3.

In the base 31 of the outsole 3, the wall thickness from the toe portion 10 to the heel portion 12 via the tread portion 11 is formed uniformly. Moreover, the base 31 of the outsole 3 is formed to be equal to or thinner than the wall thickness of the bottom 21 of the upper 2.

As shown in fig. 1 and 2, a hollow structure 22 is formed in the heel 12 of the bottom 21 of the upper 2. As shown in fig. 2, the hollow structure 22 includes a first thick portion 23 rising from the bottom surface thereof and a second thick portion 24 protruding less than the first thick portion 23.

Fig. 3 is a view of the heel shown in fig. 2 in plan view. As shown in fig. 3, the first thick portion 23 is formed in a lattice shape dividing the hollow structure portion 22 into a plurality of regions, and the second thick portion 24 formed in a lattice shape smaller than the first thick portion 23 is formed inside the first thick portion 23.

The work shoe 1 having the above-described structure can be provided with the hollow structure portion 22, whereby the heel portion 12 of the outsole 3 can be made thinner (for example, 9 mm) in the double-color molding. Further, with the construction of the work shoe 1 of the present embodiment, the dynamic friction coefficient of the work shoe was measured by setting the thickness of the heel 12 of the outsole 3 to 9mm, and as a result, it was confirmed that the dynamic friction coefficient was about 0.48, and it was the highest section of 5 sections having a dynamic friction coefficient of 0.30 or more in the safety shoe and work shoe technical guideline 2.2 slip resistance of the technical guideline JN IOSH-TR-No.41 of the institute of labor and health, and the body feeling slip resistance was good.

As described above, the thickness of the base 31 of the outsole 3 of the work shoe 1 of the present application is formed to have a uniform size from the toe portion 10 to the heel portion 12, and the entire surface can be uniformly pressed, so that the slip resistance is improved.

Further, since the hollow structure portion 22 is provided at the heel portion 12 of the bottom portion 21 of the upper 2, a proper heel height can be provided, and the thickness of the heel portion 12 of the outsole 3 can be made thin, so that high slip resistance can be obtained.

Further, by providing the first thick wall portion 23 and the second thick wall portion 24 in a lattice shape in the hollow structure portion 22 of the bottom portion 21 of the upper 2, it is possible to prevent extreme deformation of the block design due to the convex portion 32 of the outsole 3, and it is possible to improve the resistance against the running direction and the slip resistance.

Further, the hollow structure 22 of the bottom 21 of the upper 2 realizes weight reduction of the sole, and enables more comfortable walking.

In the present embodiment, the work shoe 1 is a long shoe for work, but the shape of the upper other than the bottom 21 is not limited to the above-described embodiment.

Symbol description

1 … working shoe, 12 … heel, 2 … upper, 21 … upper bottom, 22 … hollow structure, 23 … first thick wall portion, 24 … second thick wall portion, 3 … outsole, 32 … convex portion (block design).

Claims (2)

1. A pair of work shoes is formed by two-color molding,

the work shoe comprises an upper and an outsole, wherein the outsole has a base part jointed with the bottom of the upper and a block design formed on the bottom surface of the base part,

the work shoe is characterized in that,

the wall thickness of the base of the outsole is formed uniformly over substantially the entire face,

the base of the outsole is formed to be equal to or thinner than the wall thickness of the bottom of the upper,

a hollow structure part is arranged at the heel part of the bottom of the upper,

the hollow structure portion has an upper opening, and the hollow structure portion has a thick wall portion formed on a part of the bottom surface.

2. The work shoe of claim 1 wherein the shoe is made of a material selected from the group consisting of,

the hollow structure portion of the upper bottom portion includes:

a first thick portion in a lattice shape, which stands up as the thick portion from the bottom surface of the hollow structure portion; the method comprises the steps of,

and a second thick portion in a lattice shape protruding from an inner bottom surface divided by the first thick portion.