JPS60158802A - Electrostatic shoes - 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 The present invention relates to an electrostatic shoe that releases static electricity from the sole of the shoe and prevents static electricity from accumulating on the body.

Conventional electrostatic shoes either use a conductive material in the entire insole, or embed metal chains, conductive rubber studs, etc. in a part of the insole, and only use a conductive material between the insole and the outsole. The outer sole is made of black rubber containing carbon black, white comb containing plasticizer or surfactant, or plastic material containing titanium oxide. The body's static electricity flowing through the body was channeled through this top and bottom to the ground.

However, it is very difficult to keep the electrical resistance value of this outsole within a certain range during manufacturing. That is, the resistance value is 1.0X
103 to 1.0 x 10" Ω, which tends to be extremely unstable in terms of performance. Also, during storage after shoe manufacturing, the performance of the outsole changes depending on humidity, temperature, etc., and also changes over time. Continuity through the wire was extremely unstable.

Furthermore, on the outsole, there are changes in the contact area when walking or crouching, or changes in contact area due to body weight on hard or soft floors, but since the resistance value is inversely proportional to the contact area, Performance was always unstable. Furthermore, when the rubber of the outsole is impregnated with oil or solvent, the rubber swells, and as a result, contact between the carbon blacks is hindered, resulting in an increase in electrical resistance, and in this case, the conductive performance also becomes unstable. As described above, the conduction of static electricity through the conventional outsole is extremely unstable depending on natural conditions, wearing conditions, etc. Therefore, even if the insole has completely conductive metal, it is not desirable for electrostatic shoes. .

Therefore, electrostatic shoes have been proposed in which a conductive material in the midsole is connected to an iron ground for electrical conductivity. However, if you walk on iron plates etc. with these shoes, there is a risk of slipping, and there is also a risk of sparks being generated due to impact with the iron plate, and these sparks can cause an explosion if the workplace is in a place where open flames are strictly prohibited. Moreover, there were drawbacks such as water, oil, etc. impregnating from the contact surface between the metal chain and the outsole material, and in the end, electrostatic shoes with metal chains embedded in the outsole were not practical.

The present invention has been proposed in order to eliminate the above-mentioned conventional drawbacks, and by using fine fibrous metal wires or conductive wires, the unstable performance of the conventional outsole can be eliminated, and the present invention can also be achieved by using metal chains. To achieve this aim the invention aims to obtain an electrostatic shoe which is different from those which have a hazard such as It has a structure in which the required number of fine fibrous metal wires are buried so as to penetrate through the outsole so that they are exposed on the outer surface of the outsole. Electrostatic shoes that can be used as electrostatic shoes and are not affected by changes in the ground contact area when worn, are not affected by humidity, temperature, etc., and have no risk of slipping or generating sparks. This is what we intend to provide.

Embodiments of the invention will now be described with reference to the drawings, in which the drawings show embodiments of the invention. In the figure, an electrostatic shoe 1 has a midsole 2 and an outsole 3 that are integrally joined by adhesive or simultaneous vulcanization. The inner sole 2 may be entirely formed of a conductive material as shown in FIG. 2, or may have a metal chain 2a buried therein as shown in FIG. The outer sole 3 is made of the same material as before, but contains black rubber containing carbon black, plasticizer and surfactant. In addition to plastics containing white rubber, titanium oxide, etc., plastic soles such as PVC can also be used regardless of the material. 4 is a fine fibrous metal wire, one end of which is in contact with the conductor of the inner sole 2 (metal chain 2a in FIG. 4, rubber stud 2b in FIG. 5), and the other end is connected to the outer bottom surface 3a of the outsole. The required number of outsole 3'f so as to be exposed:
It is buried so as to penetrate through it. Note that the penetrating state of the fine fibrous metal wires does not necessarily have to be parallel. Further, this embedding is carried out in a casting manner when the outsole 3 is integrally vulcanized and molded with the inner sole 2.

As the metal wire 4, stainless steel fine fiber wire, copper fine fiber wire, etc. can be used. Note that other materials may be used instead of the metal wire as long as they have good conductivity and are stable. Copper wire may develop a patina, but it is only visible on the sole of the shoe, so it can be used without particular emphasis on product value.

On the other hand, stainless steel wire (wire diameter 30 μm or less) is not conspicuous in terms of hue, and if it is in the form of fine fibers, it will wear out at the same time as the top and bottom surfaces are abraded, so it is most preferable for use in the product of the present invention. Thunderon (product name) is made by surface-treating acrylic fibers with copper sulfate (plastic plating method).
Although it is possible to use , it is inappropriate because it deforms and changes in quality during vulcanization.

The bottom surface of the safety shoes is usually formed with grooves 5 in the form of lines, as shown in FIG. In this case, since the only part to be grounded is the convex surface, the metal wire 4 must be buried between the convex surface and the conductor in the middle bottom. Also, Fig. 3 shows the metal wire 4
An example of the burial position of the group is shown below.

The above was a case where the metal wire 4 was buried and penetrated through the front and bottom 3 as it was, but as in the case of a cylindrical body shown at 6 in FIG.
The upper and lower surfaces of a cylindrical body made of the same material as the outsole 3 are formed in advance so that both ends of the fine fibrous metal wire 4 are exposed, and when the insole 2 and the outsole 3 are vulcanized and molded together, If this cylindrical body 6 is placed in the conductive part of the midsole and then molded, it is possible to manufacture electrostatic shoes that are easier to work with than directly embedding metal wires in the outsole. It is possible.

As explained in detail above, the present invention allows the use of conventional standard outsole materials by simply embedding fine fibrous metal wires in the outsole, so the cost is not particularly high.
Moreover, since it has nothing to do with the resistance value of the outsole, plastic soles such as PVC soles, and even foamed urethane soles with a resistance value of 1.0×10 10 or more can be used as electrostatic shoes. Also, it is completely unaffected by humidity, temperature, etc. during storage and use.

Furthermore, according to the present invention, static electricity from the human body quickly escapes from the metal wire part on the top and bottom to the earth, and has no relation to the surrounding top and bottom, so the resistance performance value is affected by the pressure of the human body when worn, changes in ground contact area, etc. No consideration is necessary. In addition, since the metal wire is in the form of fine fibers, as the top and bottom surfaces wear, the exposed portion of the metal wire also wears out at the same time, and a large amount of the metal wire is exposed on the bottom surface, causing slippage and sparks. There is nothing like that at all. In this way, Honhirō has created electrostatic shoes with extremely excellent performance based on ideas that were completely new to the past, and is an outstanding contributor to the industry.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a side view of the electrostatic shoe, FIG. 2 is a detailed side sectional view of the main part, and FIG. The plan view, FIGS. 4 and 5 are sectional views showing an embodiment different from FIG. 2, and FIG. 7 is a side sectional view of a main part of an embodiment different from FIG. 2. Explanation of the main parts of the diagram 1: Electrostatic shoes 2: Insole 2a, metal chain 2b, rubber studs 3: Outsole 3a: Outer surface of the sole 4: Fine fibrous metal wire

Claims (1)

[Claims] In electrostatic shoes that use a conductor in part or all of the insole,
A required number of fine fibrous metal wires or conductive wires are embedded so as to penetrate through the outsole so that one end is in contact with the conductor of the inner sole and the other end is exposed on the outer surface of the bottom of the outsole. Electrostatic shoes.