JPS646085Y2 - - Google Patents

Description

[Detailed explanation of the idea] (Industrial application field) The present invention relates to anti-static shoes.

(Prior Art) Conventional antistatic shoes that prevent the human body from being charged with static electricity include, for example, shoes with metal studs embedded in the soles, or shoes whose core structure has been modified to have a structure with good conductivity. Various research and developments have been carried out, and for example, it is already known in Utility Model Publication No. 58-26561.

(Problem that the invention seeks to solve) However, as a result of research that has focused only on conductive performance in conventional antistatic shoes, the positions where the metal studs or center cores are installed are located at the arch of the foot, at the front left and right. position (approximately tread position). However, as is well known, this position is the part where the sole of the shoe bends when the shoe is worn, and therefore, if a hole for inserting a metal stud is made at this position, tears are likely to occur, and the center core etc. If the special structure of the shoe is buried, the flexibility of the shoe will be hindered, leading to problems such as poor wearing comfort.

(Means for solving the problems) As a result of research to solve these problems, the present invention solves the above problems by providing a metal stud approximately in the center between the base and tip of the thumb on the sole of the foot. This is what we discovered to solve the problem.

The present invention will be explained below based on the drawings. Reference numeral 1 denotes an insole made of sponge material or the like. 2 is insole 1
This is an insole made of fiber or the like that is attached to the bottom side of the shoe. Reference numeral 3 denotes an outer sole formed of conductive rubber and adhered to the lower surface side of the midsole 2. Reference numeral 4 denotes a metal stud with an I-shaped longitudinal section, which is provided at approximately the center of the insole contact area of the thumb (approximately the center between the base and tip of the thumb) when the shoe is worn; It is provided with a slight bulge on the upper surface side of the pad 1, and the lower end surface is fixed to the outer sole 3 so as to be electrically conductive.

(Function) When the shoes of the present invention are worn, static electricity is applied to the outer sole 3 through the metal studs 4 from the thumb surface pressed with the maximum pressing force at the center of the thumb, and from the outer sole 3 to the ground. This makes it possible to conduct static electricity and prevents the human body from becoming electrostatically charged.

Hereinafter, the results of the time-lapse test of the electrostatic charging voltage of the present invention will be explained based on FIG. 4. FIG. 4 shows the charging voltage-time curve, and the measurement locations were the following four locations.

Measurement location of curve A: General work shoes Metal stud location of curve B: Thumb center position (Fig. 3b)
Position of the metal rivet on curve C...Position of the base of the thumb (3rd position)
(Position shown in Figure c) Metal stud position on curve D...Position just in front of the arch of the foot (Position shown in Figure 3, d) Next, the measuring method is as follows: (1) Half of the four layers of synthetic fiber Fold it over and short-circuit one end of the short side with the human body. In the case of this test, the abdomen. (2) Rub it with your hands for about 20 seconds (friction) and immediately measure the change in electrostatic voltage over time. (3) For measuring charged voltage, current collector type potential measuring device KS-
325 type (manufactured by Kasuga Denki) was used as the recorder.
Figure 4 shows the results of measurements using TYPE30066, PEN-RECORDER (manufactured by Yokogawa Hokushin Electric). In other words, the curve for general work shoes A is immediately after charging.
A 30 to 40 second plateau is seen, and this trend is also seen in the curve C, with a 10 to 15 second plateau. On the other hand, the above-mentioned plateau part is not seen in curve B, which was measured at the caulking position b of the metal stud of the present invention, and curve D, which was measured while wearing the metal stud at a position slightly in front of the arch of the foot. The reduction in charging voltage and the relaxation time were shorter than those of samples A and C, and a remarkable relaxation phenomenon was observed immediately after the measurement, clearly showing that the antistatic ability was excellent.

(Effects of the invention) When this invention is implemented, the contact with the human body is good, but the bending of the conventional shoe sole, which has caused deterioration of the function of the sole such as cracking and breakage due to repeated bending, making it uncomfortable to wear, etc. There is no fear of cracks, breakage, etc. due to repeated bending, and the antistatic shoe has a good current conduction effect and is comfortable to wear.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing the present invention. FIG. 2 is a longitudinal sectional view. FIG. 3 is a diagram illustrating the present invention and other comparative measurement locations. FIG. 4 is a diagram showing a charging voltage-time curve. 1... Insole, 2... Insole, 3... Outer sole, 4...
Metal stud, A...Charging voltage-time curve, B...Charging voltage-time curve, C...Charging voltage-time curve, D...Charging voltage-time curve.

Claims (1)

[Scope of utility model registration request] A metal stud is provided on the sole of the shoe where the center of the thumb comes into contact when the shoe is worn.The upper end of the metal stud bulges out toward the insole where the thumb comes into contact, and the lower end is made of conductive synthetic rubber. Anti-static shoes characterized by a fixed outer sole.