Safe toecap cover made of resin

A technology of resin type and toe cap, which is applied in the direction of shoe uppers, footwear, household components, etc., and can solve problems such as damage to the connecting part

Inactive Publication Date: 2004-02-04
YKK CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the toe cap is subjected to a greater force or load, the connecting portion between the front end protrusion and the top is subjected to a large load due to the shape of the toe cap, so that the connecting portion is subjected to a large load. damage
In order to solve this problem, the following improvement measures have been taken: the thickness of the connecting part is made greater than the thickness of other parts (the front end convex part and the top), but this measure still has certain limitations when the toe cap is fitted on the shoes and feet

Method used

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  • Safe toecap cover made of resin
  • Safe toecap cover made of resin
  • Safe toecap cover made of resin

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0036] First, weigh out thermoplastic resin balls (60% by weight of glass fibers in polyurethane) that are cut into fibers with a diameter of about 0.5 mm and cut into lengths of 20 mm to increase strength, and complete plasticization by heating in a quasi-mold The way of preliminary molding (after applying a 0.5kg / cm 2 pressure, and under the temperature condition of 210° C., the operation was carried out for 0.5 minutes), so that a parison of a toe cap was prepared. Next, the parison is put into a toe cap die and heated in a 400kg / cm 2 Under the pressure of 135 ° C, compression molding was carried out, so that a toe cap for safety shoes with a size of 26 cm was made.

[0037] The structural form of the manufactured toe cap is as follows Figures 1 to 4 shown. like figure 2 As shown, this structure is provided with a front protruding part 1, a protruding part 2 on the side of the big toe and a protruding part 3 on the side of the little toe, and the protruding part of th...

example 2

[0039] Toe caps were manufactured in the same manner as in Example 1 above, except that fiber-reinforced thermoplastic resin balls containing 60% by weight glass fibers in nylon 6 were used. The structural form of the toe cap of making is also identical with example 1.

example 3

[0041] Toe caps were manufactured in the same manner as in Example 1, except that fiber-reinforced thermoplastic resin balls containing 75% by weight glass fibers in polypropylene were used. The structural form of the toe cap of making is also identical with example 1.

[0042] The headroom heights of the above-mentioned toe covers obtained in Examples 1 to 3 were measured with an impact energy of 200 Joules. This measurement shall be carried out in accordance with the measurement method in the CEN standard. The standard value specified in this standard is: when the impact energy is 200 joules (20kg×100cm), the headroom height is 14mm, and there must be no cracks that allow light to pass through the toe cap. The results are shown in Table 1.

[0043] Table 1

[0044] Headroom height when the impact energy is 200 joules (20kg×100cm)

[0045] Example 1

Example 2

Example 3

sample number

Polyurethane...

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Abstract

A resin safety shoe toe cap made from a fiber-reinforced thermoplastic resin, wherein the toe cap resin safety shoe toe cap is constituted from rising parts comprising a front end rising part 1, a big toe side rising part 2 and a little toe side rising part 3; a top part 6; and a base part 5, wherein the thickness of the big toe side rising part 2 is made to be greater than the thickness of the little toe side rising part 3. Moreover, the big toe side rising part 2 and the little toe side rising part 3 are connected to the front end rising part 1 by curved surface parts 4 having different curvatures, and the rising parts are formed so as to rise up approximately perpendicularly to the base part 5. The safety shoe toe cap not only satisfies the performances in L-class and S-class of JIS T 8101, but also the impact resistance and compression resistance performances stipulated in H-class of JIS T 8101 and safety shoe standards in the CEN Standard, without impairing the ability to fit to shoes and wearer's feet.

Description

technical field [0001] The present invention relates to a safety toe cover, which can be applied to shoes, boots or the like, in order to increase the structural strength of the toe cap, thereby increasing safety. Background technique [0002] As far as safety toe covers are concerned, the strength of the upper of the shoe is very important to prevent heavy objects from falling, so many steel toe covers are widely used. However, since the shoes with the steel toe caps are very heavy, it presents a problem to the person wearing such shoes. For this reason, in recent years, in order to make safety shoes lighter in weight, someone has developed toe caps made of thermoplastic resin with reinforcing fibers (such as glass fibers). [0003] In the conventional safety toe cap made of thermoplastic resin containing reinforcing fibers, the material used therefor is already known, for example, Japanese Patent Laid-Open No. 2000-238142. Japanese Patent Laid-Open No. 2000-238142 disclo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A43C13/14A43B23/02A43B23/08B29C43/18B29L31/50C08J5/04
CPCA43B23/087Y10T428/249924A43B23/02
Inventor 田中嘉治広田睦夫石田智久
Owner YKK CORP
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