JP2981485B2 - Anti-slip sole and method of manufacturing the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to shoes used by persons engaged in a building cleaning operation, and applies a water-based wax release agent to a smooth tile floor surface, and when the wax is released, the floor surface gets wet and slips. The present invention relates to an anti-slip sole designed to work safely without slipping even in a state where it becomes easy and not to damage the floor, and a method of manufacturing the sole.

[0002]

2. Description of the Related Art In general, floors of buildings are laid with tile flooring made of polyvinyl chloride having a smooth surface, and the surface thereof is coated with a polishing wax to prevent dirt. The floor cleaning work of a building is performed about once a year, and a wax remover is used to remove dirt from the floor and to remove wax from the floor surface. At this time, the floor surface becomes very slippery, similar to thick ice melted.

[0003] Conventional shoe soles are made of rubber soles with anti-slip design for imparting anti-slip properties, or short fibers such as organic fibers and inorganic fibers are compounded as a non-slip agent in a rubber kneaded material. Shoe soles in which the anti-slip agent is exposed on the rubber surface have been proposed, but even if shoes using these soles are used, the tiles are liable to slip on the floor of the tile during wax removal work. There was often a danger of falling and was often subject to work-related injuries.

[0004]

SUMMARY OF THE INVENTION The present invention provides a tile floor which is not slippery even when the smooth tile floor is in an extremely slippery state in which an aqueous wax release agent is applied on the entire surface. An object of the present invention is to provide a shoe sole which is not damaged and has a protective property which does not impair the smoothness and surface gloss.

[0005]

The anti-slip sole of the present invention comprises:
A sole made of a polymer elastic body composed of a base portion (1) and a ground portion (2), wherein the ground surface (3) of the ground portion (2) has a smooth surface, and the ground surface is provided. (3) is provided with a number of cuts (4) perpendicular to the center line A-A connecting the toe and the heel portion in the width direction, which are substantially perpendicular to the upper surface of the shoe sole. ) Consists of three members: a front part (2a), a center part (2b), and a rear part (2c). At least the front part (2a) and the rear part (2c) contain organic short fibers, and A large number of organic short fibers are exposed on the front surface (3a) and the rear portion (3c) of the ground surface, and the base (1) is at least a front portion (2a) of the ground portion (2). ) And a polymer elastic body softer than the rear part (2c).

In the method for producing a slip-resistant sole according to the present invention, a rubber kneaded material containing an organic short fiber (5) and a foaming agent as main components is sheeted, cut into a predetermined shape, and a non-sealed portion for a ground contact portion. Forming a vulcanized rubber part (6), and then blending the organic short fiber (5) and a foaming agent blended so that the hardness after vulcanization is softer than that of the unvulcanized rubber part (6) for the ground part. The rubber kneaded material containing no rubber is sheeted and cut into a predetermined shape to form a base unvulcanized rubber part (7), and the unvulcanized rubber part (6) for the ground part and the base unvulcanized rubber. A rubber part (7) is formed in a hollow portion formed by combining a lower mold for shoe sole molding in which a number of continuous band-shaped blades parallel to each other in the width direction of the bottom stand on the bottom and an upper mold. Are placed in sequence, and after clamping, heat and pressure are applied to foam the unvulcanized rubber part (6) for the grounding part and vulcanize with the unvulcanized part for the base. After forming the sole integral with, the ground portion of the sole and buffing, and wherein the exposing the organic short fibers.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION In the present invention, a polymer elastic body constituting a base (1) and a grounding part (2) constituting a sole of a shoe is made of natural rubber, polyisoprene rubber, styrene butadiene rubber,
Polybutadiene rubber, nitrile butadiene rubber, chloroprene rubber, ethylene propylene rubber, butyl rubber, urethane rubber, acrylic rubber, polypiclohydrin rubber,
At least one selected from propylene oxide rubber, ethylene-vinyl acetate copolymer, polyvinyl chloride, polyolefin, thermoplastic polyurethane, thermoplastic rubber, and foamed polyurethane.

[0008] Also, the contact surface (3) of the contact portion (2) of the shoe sole
Has a smooth surface without uneven design, and its ground surface (3)
There are provided a number of cuts substantially parallel to each other at right angles to a center line AA connecting the toe and the heel portion, and are provided vertically toward the upper surface of the shoe sole. It is necessary for the grounding surface (3) to have a smooth surface without any uneven design in order to maximize the grounding area and increase the slip resistance, and the cut is used to remove the water film on the tile floor surface wet with an aqueous wax release agent. This contributes to imparting cutting and slip resistance. The cut grooves are continuous band-shaped grooves provided in parallel with each other in the width direction of the shoe sole, and among them, the shape of the groove is preferable because the continuous band-shaped wavy line provides an anti-slip effect in the sliding direction. The depth of the cut groove is 2
5 m / m is appropriate.

Next, in order to increase the anti-slip effect, the member of the ground contact portion (2) is characterized by being made of a polymer elastic body containing the organic short fiber, and the ground surface is buffed or the like. The organic short fibers must be exposed on the surface by polishing. It is necessary that the organic short fibers are exposed at least in the front part (2a) from the toe to the heel part and in the rear part (2c) corresponding to the heel part, and it is more preferable that the organic short fiber is exposed in the entire contact part. .

[0010] Further, it is preferable that the elastic polymer used for the grounding portion (2) is a rubber member in order to impart anti-slip property, and natural rubber, polyisoprene rubber, At least one rubber member such as styrene butadiene rubber, polybutadiene rubber, nitrile butadiene rubber, chloroprene rubber, ethylene propylene rubber, butyl rubber, urethane rubber, acrylic rubber, polypiclohydrin rubber, propylene oxide rubber, and thermoplastic rubber is selected. . The rubber member is more preferably a foam, and the sole having the cut can contact the ground contact surface with a larger contact area. Considering the physical properties of the shoe sole, the specific gravity of the foam is preferably 0.7 to 0.9.

The organic staple fiber used in the present invention has a suitable rigidity in order to impart anti-slip properties, and is made of polyamide fibers such as nylon 6, nylon 66, and aramid fiber in consideration of the fact that the floor surface is not easily damaged. At least one is selected from the group consisting of polyester, polyester fiber and acrylic fiber.
The size of the short fiber is preferably 8 to 25 microns in diameter and 3 to 30 m in length in consideration of dispersibility and slip resistance with the floor surface.
m, preferably 3-5 mm.

When the polymer elastic body is a rubber member, the organic short fiber is added in an amount of 15 to 40 parts by weight based on 100 parts by weight of the pure rubber. Within this range, the workability during kneading is good, and the slip resistance is sufficiently maintained. Here, if the added amount of the organic short fiber is less than 15 parts by weight, the anti-slip property is not sufficiently provided, and if it is more than 40 parts by weight, the short fiber is poorly dispersed in the rubber, and the kneading operation becomes difficult.

The base (1) of the sole of the present invention is disposed so as to cover the entire upper surface of the grounding part (2), and the grounding part (2) is provided.
And is made of a polymer elastic body softer than the grounding portion (2). Grounding part (2)
Is preferably as thin as possible to impart flexibility to the shoe sole thickness, and 3 to 5 m / m is appropriate. At this time, the grounding part (2) is easily adapted to the floor, and the corners of the cuts provided on the grounding surface (3) cut the water film covering the floor surface and the organic material exposed on the surface of the grounding surface. Short fibers work to make the anti-slip effect more effective. When the polymer elastic body is a rubber member, if the hardness is 35 to 50 in JIS K6301 spring type A type, a suitable bending property can be obtained, which is preferable.

[0014]

【Example】

[Table 1]

[0015]

[Table 2]

[0016]

[Preparation of unvulcanized rubber parts of grounding part and base] According to the grounding part compounding table shown in Table 1 and the base compounding table shown in Table 2, each compounding is performed, and each is kneaded by a roll machine at a roll temperature of 45-50 ° C. Then, it was rolled to a predetermined thickness to obtain an unvulcanized rubber sheet. Cut each unvulcanized rubber sheet into a predetermined shape,
The unvulcanized rubber parts of the grounding part and the base were made. Among the above-mentioned parts, the rubber part of the ground part was set to 3 m / m, and the cutting direction was such that the rolling direction was the longitudinal direction of the shoe sole.

[0017]

[Sole molding mold] The sole molding mold used in the present invention comprises an upper mold and a lower mold. A continuous wavy strip-like blade as shown in FIGS. Are provided vertically on the bottom surface, and form notches in the ground contact surface simultaneously with the formation of the sole.

[0018]

[Formation of sole] The unvulcanized rubber part for the ground part is placed at a predetermined position on the lower mold of the mold for molding the sole, and then the unvulcanized rubber part for the base is placed thereon. Closing press temperature 14
Press vulcanization was performed under the conditions of 0 ° C., a pressure of 100 kg / cm ² , and a time of 7 minutes to foam the unvulcanized rubber part for the ground part and to form an integral part with the unvulcanized rubber part for the base.

In this case, the unvulcanized rubber part of the ground portion containing the organic short fiber may be provided separately in a front portion and a rear portion as shown in FIG. 2, or as shown in FIG. It may be provided integrally on the entire surface of the grounding surface.

The hardness of the rubber member at the base of the shoe sole after molding is J
It was 46 by IS K6301 spring type test type A. The specific gravity of the sole contact portion was 0.8. The ground portion containing the organic short fibers of the shoe sole molded by the above method was buffed and brushed with a polishing machine having a nylon brush to expose the organic short fibers to the surface.

[0021]

[Shoe making] To carry out a wear test on the sole of the present invention, the shoe upper made of vinyl leather and a rubber sponge with a cotton cloth laminated on the front and an insole made of a pulp board bonded to the last were used. Place, hang the shoe upper on the last,
A rubber-based adhesive is applied to a predetermined portion of the upper of the shoe upper and dried, and the sole of the above embodiment is pressed on the lower surface of the upper of the upper shoe and pressed. Paste the tape,
Put in a vulcanizing can, at a temperature of 127 ° C and a pressure of 2.5 kg / cm ² ,
The product was subjected to hot air vulcanization for 5 minutes to obtain shoe products.

[0022]

Comparative Example 1 For the sole of Comparative Example 1, a sole made of an ordinary rubber member having the same sole design was prepared for comparison with the sole of the present invention in terms of slip resistance. The unvulcanized rubber material having the composition shown in Table 3 was kneaded and rolled, and was molded at a temperature of 150 ° C., a pressure of 100 kg / cm ² and a time of 5 hours in a shoe sole mold having the same bottom design as that of the example.
Press vulcanization was performed under the conditions of minutes, and shoe soles as shown in FIGS. 4 and 5 were prepared. At this time, the hardness of the sole is JIS K
It was 62 as measured by a 6301 spring type test type A.

[0023]

[Table 3]

[0024]

COMPARATIVE EXAMPLE 2 The sole of the comparative example was made of another anti-slip design to compare the sole with the sole of the present invention.
The unvulcanized rubber material shown in Table 3 as in Comparative Example 1 was kneaded and rolled, and was heated at 150 ° C. under a pressure of 100 kg / cm ² for 5 minutes in a shoe sole mold (not shown) provided with an anti-slip design. Press vulcanization was performed under the conditions to prepare a shoe sole having an anti-slip design as shown in FIGS.

[0025]

[Evaluation of Slip Resistance] In order to measure the slip resistance of the shoe sole, slip-test samples of a predetermined rectangular shape were taken from the shoe soles of Example 1 and Comparative Examples 1 and 2. Each sample for the slip test was set on an Ono type slip tester (OY Pull Slip Meter) so as to be parallel to the slip direction, and a floor surface was formed from a tile having a smooth surface made of polyvinyl chloride. Then, each sample was set on a floor material uniformly covered with a wax release agent (diluted alkaline surfactant with water), and a constant load W was applied to pull the sample in the sliding direction. Table 4 shows the results of measuring the maximum tensile force F at the start of sliding and comparing the slip resistance with the sliding coefficient (CSR value) using the value of F / W. Here, the range of the slip coefficient of the shoe sole is set in consideration of the correlation of the sensory test, and the range of 0.4 to 0.7 is the optimum range. The slip coefficient of the shoe sole of the example showed a numerical value within the optimum range, and the shoe sole slip coefficient of Comparative Examples 1 and 2 showed a numerical value in a dangerous range.

[0026]

[Table 4]

[0027]

[Evaluation of slippage by putting on actual shoes] A shoe cleaning professional was requested for five pairs of shoes of the example, and a test was repeated five times by putting on the actual working floor surface. In addition, 12 pairs of shoes of the same type were requested to a professional vocational training school for building cleaning, and the test was repeated three times by putting on foot on a training floor. In any case, the anti-slip effect not found in conventional shoes was recognized, and was highly evaluated as work shoes.

[0028]

An anti-slip sole according to the present invention is a shoe sole made of a polymer elastic body in which a base and a grounding part are integrally formed. The grounding surface of the grounding part has a smooth surface. There are a number of parallel cuts substantially perpendicular to the center line A-A connecting the toe and the heel portion, which are perpendicular to the ground plane over the entire width, and the organic short fibers are exposed to the surface on the ground plane. Since the base is made of a polymer elastic material that is softer than the grounding portion, the cuts provided in the grounding surface are well adapted to the floor surface even on the tile floor surface covered with the wax release agent, and the water film is formed. In addition, the oil film is cut, and slipping can be prevented by the anti-slip effect of the organic short fiber exposed on the ground contact surface. Therefore, by wearing shoes using the sole of the present invention, the danger of falling can be avoided even during wax peeling work or walking on a slippery floor surface leaked by water.

[Brief description of the drawings]

FIG. 1 is a bottom view of a slip-resistant shoe sole of the present invention.

FIG. 2 is a sectional view taken along line AA of the embodiment of the anti-slip sole according to the present invention.

FIG. 3 is a sectional view taken along line AA of another embodiment of the anti-slip shoe sole of the present invention.

FIG. 4 is a bottom view of a shoe sole according to a comparative example.

FIG. 5 is a sectional view of the shoe sole of Comparative Example 1, taken along line BB.

FIG. 6 is a bottom view of the shoe sole of Comparative Example 2.

FIG. 7 is a CC end view of the shoe sole of Comparative Example 2.

FIG. 8 is a perspective view of a base unvulcanized rubber part according to an embodiment of the present invention.

FIG. 9 is a perspective view of an unvulcanized rubber part for a ground portion according to an embodiment of the present invention.

FIG. 10 is a sectional view of a shoe sole molding die used in the embodiment of the present invention.

FIG. 11 is a top view of a lower mold for molding a shoe sole used in the embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Base part 2 Grounding part 2a Front part of grounding part 2b Center part of grounding part 2c Rear part of grounding part 3 Grounding surface 3a Front part of grounding surface 3c Rear part of grounding plane 4 Cut 5 Organic short fiber 6 Unused for grounding part Vulcanized rubber parts 7 Unvulcanized rubber parts for base 8 Band-shaped blade 9 Upper mold for shoe sole molding 10 Lower mold for shoe sole molding

Claims (5)

(57) [Claims] 1. A sole made of a polymer elastic body comprising a base part (1) and a ground part (2), wherein the ground part (3) of the ground part (2) has a smooth surface. The ground plane (3) is provided with a number of cuts (4) that are parallel to each other in the width direction and are substantially perpendicular to the center line A-A connecting the toe and the heel portion, and are provided vertically toward the upper surface of the shoe sole. The grounding portion (2) is composed of three members, a front portion (2a), a center portion (2b), and a rear portion (2c). At least the front portion (2a) and the rear portion (2c) contain organic short fibers. At least in the front part (3a) and the rear part (3c) of the grounding surface, a large number of organic short fibers are exposed on the surface, and the base part (1) is formed of the grounding part (2). A non-slip sole made of a polymer elastic material softer than at least the front part (2a) and the rear part (2c). 2. The elastic polymer containing organic short fibers is a rubber member, and the rubber member is a foam obtained by adding 15 to 40 parts by weight of organic short fibers to 100 parts by weight of pure rubber. The non-slip sole according to claim 1, wherein: 3. The method according to claim 1, wherein the base (1) is a rubber member.
SK6301 Spring type test A hardness is 35
The anti-slip sole according to claim 1 or 2, wherein the number is from 50 to 50. 4. The organic short fiber (5) contained in the ground portion is at least one of aramid fiber, polyamide fiber such as nylon 6, nylon 66, polyester fiber, and acrylic fiber. A non-slip bottom according to any one of claims 1 to 3, characterized in that: 5. A rubber kneaded material containing an organic short fiber (5) and a foaming agent as main components is sheeted and cut into a predetermined shape to form an unvulcanized rubber part (6) for a ground portion. Next, the rubber kneaded material containing no organic short fiber (5) and a foaming agent blended so that the hardness after vulcanization is softer than that of the unvulcanized rubber part (6) for the ground part, is sheeted, The base unvulcanized rubber part (7) is cut into a predetermined shape to form a base unvulcanized rubber part (7). The lower mold for shoe sole molding, in which a number of continuous band-shaped blades parallel to each other in the width direction are erected on the bottom surface, and the upper mold are combined and sequentially placed in the cavity formed, and heated after clamping. , Pressurize to foam the unvulcanized part for the ground part (6), and vulcanize and integrate it with the unvulcanized part for the base to form the shoe sole. A method for producing a non-slip bottom, comprising buffing a ground portion to expose organic short fibers.