JP3133772U - Work shoes with toe parts reinforced with hard rubber - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lightweight and inexpensive work shoe having a reinforcing part on a toe part.
SOLUTION: A front core rubber sheet is heated and softened between a body rubber and a case back of a toe portion of a boot, and is fixed with a reinforcing cloth to form a front core portion, and vulcanized after shoe molding. , JIS K6253 Shore A hard boots having a tip made of hard rubber having a hardness of 92 to 97 are obtained. In addition, the tip core rubber sheet is heated and softened between a rubber part such as a rotating tape on the toe part of the underground tabbed and the upper cover and fixed with a reinforcing cloth to form the tip core part. By vulcanizing, an underground tab having a tip made of hard rubber having a JIS K6253 Shore A hardness of 92 to 97 is obtained.
[Selection] Figure 1

Description

   The present invention relates to reinforcement of toe portions of work shoes such as boots and underground tabs.

In conventional work shoes, a high-strength material such as a steel tip or a resin tip is sandwiched between the toes in order to ensure the safety of the toes. The so-called safety shoes were sufficient in strength, but they were not heavy and were not comfortable to the foot because of their poor weight.
Japanese Utility Model Publication No. 52-148244 JP 2005-40571 A

Moreover, in the conventional safety shoes, it is necessary to prepare the tip core member by molding in advance according to the toe shape. For this reason, it is necessary that the shape of the tip and the last fit exactly, and since the shape of the tip is limited, there is no versatility and there is a restriction on design. Also, in terms of cost, when requesting the manufacture of the lead core outsourced, the minimum lot is large, which causes a price increase.
Recently, there is no demand for safety shoes to satisfy the JIS standard, but there is a demand for low-cost work shoes that require some degree of toe protection. In order to respond to such a demand, the work shoes of the present invention have been devised.

The boots of the present invention are boots having a reinforcing part at the toe part, and a core material made of unvulcanized rubber and a reinforcing cloth for fixing the same are sandwiched between the trunk back cloth and the trunk rubber, The JIS K6253 Shore A hardness of the core after vulcanization is 92 to 97.

The underground tab of the present invention is an underground tab with a reinforcing part on the toe part, and a core material made of unvulcanized rubber and a reinforcing cloth for fixing the same between the upper and the rotating rubber part such as tape. The JIS K6253 Shore A hardness of the lead core after vulcanization is 92 to 97.

The work shoe of the present invention is a work shoe having a reinforcing part on the toe part, and a core material made of unvulcanized rubber and a reinforcing cloth for fixing the same between the upper and a rubber part such as a tip protection rubber. The JIS K6253 Shore A hardness of the core is 92 to 97 after vulcanization.

  The tip used in the present invention is in the form of a sheet and preferably has a thickness of 1.2 to 2.0 mm. Moreover, it is preferable that an adhesive is applied to both sides of the reinforcing cloth for fixing after sticking the tip.

The shoes of the present invention have high hardness rubber sandwiched between the toes of boots and underground tabs, so that the feet (toes) are protected from slight impacts on the toes, and steel toes or resin toes are used. It was lighter than the shoes used.
In addition, since the tip core is a rubber having elasticity, fatigue due to the load on the foot is reduced, the uncomfortable feeling per foot can be alleviated, and the fit can be improved.
Furthermore, the supply of the toe can be prepared in the form of a sheet, and it can be softened by heating so that it can become familiar with the last of the toes, so that no special equipment is required and work shoes can be manufactured at low cost. did it.

A boot is described as the best mode for carrying out the present invention.
1. Preparation of tip core material, reinforcing cloth and other parts The tip core used for the boots of the present invention was prepared. The tip is in the form of a sheet, and FIG.
The core rubber sheet was prepared by kneading an unvulcanized hard rubber composition with a roll and rolling it into a 1.5 mm sheet, then cutting it into a half-moon shape.

Next, the reinforcing fabric was topped with an adhesive layer on both sides of a thin fabric equivalent, and after winding, it was cut on a tape.
A schematic diagram is shown in FIG.
In addition, rubber parts such as the back of the trunk, rubber band, upper rubber, upper rubber, rotating tape, bottom rubber, and other necessary parts such as snow-proofing pieces were prepared.

2. Processing process The cylinder back, which is sewn in a sock shape, is hung on the last of the cylinder length, the entire back of the cylinder is glued, and the tip rubber (shown in Fig. 2) is heated and softened on the toes to adapt to the shape of the last. Then, a reinforcing cloth (shown in FIG. 3) was fixed to the edge of the tip of the tip so that the tip was not displaced.
Next, a trunk rubber was affixed from above, and the core rubber was sandwiched between the trunk back and the trunk rubber. After this, the necessary rubber parts (the former rubber, the former rubber, the heel rubber, the bottom rubber, the lower tape, the turning tape, etc.) are bonded together, and the unvulcanized rubber member is vulcanized through the vulcanization process. Die cut.

3. After die-cutting of the finishing process, snow protection pieces were sewn to obtain boots shown in FIG.
The tip of the boots had a JIS K6253 Shore A hardness of 95 after vulcanization. The toe portion had a moderate hardness and was sufficient to protect the toe portion.

It is the schematic of the boots which concern on this invention. It is a top view of the core rubber sheet concerning the present invention. It is the schematic of the reinforcement cloth for adhering the tip core rubber which concerns on this invention.

Explanation of symbols

1. Boots 2. Toe rubber (Toe rubber sheet)
3. Reinforcement cloth

Claims (4)

It is a boot having a reinforcing part on the toe part, and a toe core material made of unvulcanized rubber and a reinforcing cloth for fixing it are sandwiched between the trunk back cloth and the trunk rubber, and the toe core after vulcanization No. JIS K6253 Shore A hardness is 92-97. It is an underground mold having a reinforcing part on the toe part, and a core material made of unvulcanized rubber and a reinforcing cloth for fixing it are sandwiched between the upper and the rubber parts such as the tape, A subsurface tab characterized by JIS K6253 Shore A hardness of 92 to 97 on the core after vulcanization. It is a work shoe with a reinforced part on the toe part, and a core material made of unvulcanized rubber and a reinforcing cloth for fixing it are sandwiched between the upper and a rubber part such as a tip protection rubber. A work shoe characterized by having a JIS K6253 Shore A hardness of 92 to 97 after curing. The tip core material used in the shoes according to claim 1, claim 2, and claim 3 is a sheet having a thickness of 1.2 to 2.0 mm.

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