JPH04128604U - shoe outsole - Google Patents

Abstract

(57) [Abstract] [Purpose] To obtain a pre-vulcanized rubber outsole that is difficult to peel off from the lower surface of the upper even if the adhesive surface is flat. [Structure] A groove is bored in parallel to the width direction on the top surface of the tread part, which is most likely to peel off.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

With this invention, even if the lower surface of the instep and the upper surface of the pre-vulcanized outsole do not match, The present invention relates to a shoe outsole that does not peel off after the two are bonded together.

0002

[Conventional technology]

The outer soles used in shoes are made of plastic to give the contact surface a clear and deeply carved design. A rubber outsole is used that is pre-vulcanized by a resin machine. In this case, the curved surface of the adhesive surface of the lower surface of the instep with the outsole of the shoe and the pre-vulcanized rubber If the curved surface of the adhesive surface of the outsole and the lower surface of the instep are different, for example, if the two are glued together and During the vulcanization with hot air inside the shoe, there were many cases where the outer sole of the shoe peeled off from the upper.

0003

[Problem that the idea aims to solve]

In an attempt to prevent this phenomenon, conventional techniques have been used to cover the lateral boundary between the upper and the outsole. In order to attach reinforcing tape so as to increase the adhesive area between the upper and the outsole of the shoe A recess is provided on the adhesive surface of the outer sole of the shoe to the lower surface of the upper, and it also matches the curved surface of the lower surface of the upper. A method was adopted in which a curved surface was provided on the adhesive surface of the outsole of the shoe to the instep. .

0004 However, the above three methods are useful in preventing the upper and the outer sole of the shoe from peeling off. However, they all have the disadvantage of being labor-intensive and high manufacturing costs. Ta. In view of these issues, the present invention was developed to create a shoe that can be firmly bonded to the lower surface of the instep without requiring any effort. Its purpose is to provide an outer sole.

[0005]

[Means to solve the problem]

In the present invention, an appropriate number of grooves (3 ) is the sole of the shoe with perforations.

[0006]

[Effect]

The outsole of this invention comes into contact with the part of the lower part of the instep where the curved surface is the most swollen when bonded. An appropriate number of grooves (3) substantially orthogonal to the length direction are bored in the part, that is, the treading part (2). Because of this, there is no special repulsive force when bonding the outsole and the upper, and it is extremely effective. In a natural state, the outsole of the shoe conforms to the curved bulge of the lower surface of the upper, and therefore, for example, when vulcanized During hot air vulcanization in a can, the adhesive will not peel off even if it softens due to heat. The outer sole of the shoe will not separate from the instep even if the product is worn for a long time after bonding. .

[0007]

【Example】

As shown in Figures 1 and 2, the flat upper surface (1) has a treading part (2) with a width of 2 mm and a depth. Five grooves (3) with a diameter of 1.5 mm were bored, and these were used as the outsole (4) of the present invention. The outer sole (4) of this shoe is made of a 50:50 mixture of natural rubber and styrene-butadiene rubber. It is a molded vulcanized rubber obtained by adding a specified rubber compounding agent to blended rubber, and the thickness is 5. mm.

[0008] As shown in Figure 3, this shoe outsole (4) is made of polychloroprene on the lower surface of the upper (5). The shoes were bonded with a rubber adhesive and vulcanized in hot air in a vulcanizing can. We manufactured 100 pairs of these shoes, but the outsole (4) has peeled off from the underside of the upper (5). I don't have any shoes at all, and I want to wear 30 of them for about 8 hours a day for 6 months. In all 30 pairs, the outer sole (4) did not peel off from the lower surface of the upper (5) at all.

[0009]

[Effect of the idea]

Attach reinforcing tape to the lateral interface between the instep and the outsole, or A recess is provided on the adhesive surface, and a curved surface that matches the curved surface of the lower surface of the upper is added. It is a new and low-cost product that does not require installation on the adhesive surface of the outer sole of the shoe. The outsole of this invention provides strong adhesion to the underside of the instep under all conditions. We were able to.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing one example of the outsole of the present invention.

FIG. 2 is a sectional view taken along the line AA in FIG. 1;

FIG. 3 is a side view illustrating the process of bonding the outsole of the present invention to the lower surface of the upper.

[Explanation of symbols]

1 Upper surface of shoe outer sole (4) 2 Treading section 3 groove 4 Outer sole 5 Instep

Claims (1)

[Scope of utility model registration request] 1. An outsole of shoes having an appropriate number of grooves (3) perforated on the upper surface (1) substantially orthogonal to the longitudinal direction of the tread portion (2).