JPS61181401A - Fire extinguishing boots - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] [Industrial application field 1 The present invention relates to a method for manufacturing firefighting boots.

[Conventional technology]

In general, firefighting boots are required to have heat resistance and puncture resistance from the standpoint of firefighting activities. As a countermeasure, traditionally, the surface of the boots, including the upper rubber (3), has been treated with a silver color to improve heat resistance, and heat-resistant rubber has been used for the outsole (6) and other sole rubber. At the scene of a fire, etc. where there is a lot of heat, the upper edge (7) often becomes hot (which can hinder firefighting efforts. Also, as a measure to prevent shoes from being pushed through, a stainless steel plate (11) is attached to the sole of the shoe. However, the upper edge (7) is not reinforced, and there is a high risk of stepping on nails, etc., which greatly impedes firefighting efforts.

In view of the above-mentioned circumstances, there is a strong demand for firefighting boots with particularly good heat insulation properties and punch-through resistance of the upper edge (7).

Incidentally, firefighting boots commonly used at present have a shape as shown in FIG. That is, it consists of a knee cover (1) made of flexible rubber or vinyl, followed by a torso rubber (4) and instep rubber (3) made of the same thick and firm material, and the outsole C6) is integrated. A toe rubber (5) is attached to the tip of the toe, and reflective tape (2) is attached to the upper edge and back of the rubber (4).

The part of the lower edge of the instep rubber (3) that joins to the outsole (6) is referred to as the instep edge (7). A band hole (8) for a hanging band is provided on the outer upper edge of the knee cover (1). This is the external appearance of commonly known firefighting boots.

[Problem that the invention seeks to solve]

It is an object of the present invention to solve the above-mentioned drawbacks and provide firefighting boots with excellent heat insulation and puncture resistance.

[Means for solving problems]

The present invention aims to provide firefighting boots with excellent heat insulation and puncture resistance by imparting heat insulation and puncture resistance to the upper edge (7) of firefighting boots, and the cutting strength of single fibers is improved. 1
Cut a piece of aramid fiber (trade name: Kevlar) with a basis weight of 200 grams or more per square meter, which is 15 grams or more per denier, into a tape with a width of 2 cm or 5 cm, and add 2 mm on each side of the tape. Heat-proofing and punch-proof properties obtained by molding and vulcanizing the upper edge wrapping cloth (X15), which is provided with a glue part 1161 coated with adhesive and having a width of 10 mm or more, between the upper edge (7) of boots. These are excellent firefighting boots. The shape of the instep wrapping cloth (15) is shown in FIG.

[For production]

The middle edge part (7) of the firefighting boots has a structure as shown in FIG. 2 as a cross-sectional view of section A. That is, from the inner layer of the boots to the lining (9)
, the middle sole rubber (121), and the stainless steel plate (11) to prevent punching.
13) and the instep lower rubber (0) are continuously molded together with the outsole (6), but this instep rubber (3) and the outsole (
6) is called the instep part (7), and when forming this instep part (7), the rubber 0-pull instep wrapping cloth 11 is applied under the instep.
5) is held and molded so that one end overlaps the stainless steel plate (11). If you form it like this, the instep wrapping cloth (
15) is stably held between the glued portions (16) on both sides while maintaining the air-containing properties of the fabric, and the air layer provides excellent heat insulation. In addition, the instep wrapping cloth r, 15) made of aramid fibers has excellent punch-through resistance due to the high strength of the aramid fibers that make up the fabric. Although it is significantly reduced by fixing the constituent fibers, excellent punch-through resistance is maintained by maintaining an air-containing state as in the present invention, that is, by allowing even some fiber transferability to remain.

It should be noted that there is no problem whether the instep wrapping cloth 115) is held in a single layer or in multiple layers on the instep edge (7).

[Example 1] Using 10 count single yarn of spun yarn made of aramid fiber, weaving density is 50 vertically and 45 horizontally per square meter, and a floating fabric with a basis weight of 250 grams is made into a tape shape with a width of 5 cm. As shown in Fig. 3, the instep wrapping fabric (I5) was coated with rubber latex to a width of about 4 mm on each side to form a glued part (16), as shown in Fig. 3. As shown in the figure, the shoes are held between the upper edges (7) and molded and vulcanized in the usual manner to produce firefighting boots.

The firefighting boots of the present invention have excellent heat insulation and about 5 times higher puncture resistance than conventional products.

[Example 2] A canvas with a fabric weight of 650 grams per square meter made by weaving 4 lO count aramid fiber spun yarns at a weaving density of 35 vertically and 25 horizontally per inch was shaped into a tape with a width of 4 cm. Shoes were made by sandwiching a single layer of instep wrapping fabric 115), which was cut into strips and coated with rubber latex to a width of about 5 mm on both sides to form glued parts (16), as in Example-1. .

A comparison of heat resistance and puncture resistance with conventional products is as follows:
We have obtained firefighting boots with excellent heat resistance and puncture resistance.

Note-1 Heat resistance measurement method: The upper edge (7) was heated from the outside at 300°C for 10 minutes, and the temperature rise inside was measured. However, the room temperature at the time of measurement was 20°C.

Note-2: Measurement method for perforation resistance in accordance with JIS and Tslol [Effects of the invention] The firefighting boots of the present invention have excellent heat insulation and perforation resistance, and there is no difference in wearability from conventional products. They are in good condition, making activities at fire scenes safe and easy, and are excellent firefighting boots for practical use.

[Brief explanation of drawings]

FIG. 1 is an external perspective view showing an example of firefighting boots of the present invention. FIG. 2 is an enlarged cross-sectional view of the main part of section A in FIG. FIG. 3 is a partially cutaway plan view showing an example of the instep wrapping cloth used in the present invention. 1...Knee cover 2...Reflective tape 3...Rubber instep 4...Rubber torso 5...Rubber toe 6...
Outsole 7...Middle edge 8...Band hole 9...
・Lining 10...Inner sole rubber 11...Stainless steel plate 12...Inner sole rubber 13...Inner core rubber 1
4... Rubber under the instep 15... Instep wrapping cloth 16...
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Claims (1)

[Claims] Made of aramid fibers with a single fiber cutting strength of 15 grams or more per denier, the basis weight per square meter is 20
An instep edge made by cutting a fabric weighing 0 grams or more into a tape shape with a width of 2 cm to 5 cm, and providing glued parts (16) with a width of 2 mm to 10 mm on each side of the tape. These firefighting boots have excellent heat insulation and puncture resistance, and are made by sandwiching a wrapping cloth (15) between the upper edge (7) of the boots and molding and vulcanizing them.