JPS6137104A - Production of 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 (Field of Industrial Application) The present invention relates to a method of manufacturing electrostatic shoes that releases static electricity charged on a human body to the ground.

(Prior art) Conventional electrostatic shoes use a conductive rubber outsole, and in order to electrically connect this outsole to the sole of the foot, metal studs penetrate the insole or conductive rubber insole is used to electrically connect the outsole to the sole of the foot. A method using a core (Japanese Utility Model Publication No. 58-26561) has been proposed. However, these electrostatic shoes require special metal rivets and cores to be manufactured and attached separately, which inevitably increases the manufacturing process and costs.

(Problems to be Solved by the Invention) The present invention does not require many extra parts or manufacturing processes unlike the conventional electrostatic shoes, and uses seams only in the injection molding process of the outsole. The purpose is to form a conductive synthetic resin film on the upper surface of the midsole that communicates with the outsole.

(Means and effects for solving the problem) For this reason, the present invention has the advantage of bending and sewing the edge of the upper to the circumferential side of the insole, and making a resin material by injection or extrusion molding on the lower surface of the insole. In a method for manufacturing shoes by molding an outsole, a conductive synthetic resin is injected into a mold for molding the outsole to mold the outsole, and by maintaining this injection pressure, the conductive synthetic resin is A synthetic resin is made to protrude from the seam between the upper sole and the insole to the upper surface of the insole, and a film of conductive synthetic resin is formed on the upper surface of the insole.

(Example) Examples of the present invention will be described below with reference to the drawings. 1 is an outsole, 2 is an insole, and 3 is a 9-piece. The outer sole is made of conductive synthetic resin (mainly polyurethane), with a body resistivity of 10Ω.
(2) This is a material formulated for use on the outsole. According to the J I Sr1103 test method, the resistance value of soles made of this material is 1. OX 10-1.0
X was approximately 10Ω, which is an ideal value for the performance of electrostatic shoes.

4 is a seam such as Matsukei stitch or other lock stitch sewing, and the edge 5 of 9 leather is folded from below to the side of the inner sole 20, and the overlapped part of both is sewn with thread to form seam 4. It is something to do. Now the insole 2 and 9 leather 3 are integrated,
This is mounted in a mold 6 as shown in FIG. 3, and the outsole 1 is formed by injection molding. In this case, another mold 7 is inserted between the leather 9 and the insole 2, and the thickness of the outsole 1 is formed by the mold 6 on the lower surface of the insole 2, which is supported from above by this mold. A space 8 corresponding to this is formed.

In this state, conductive synthetic resin is injected and filled into the space 8 using an injection molding machine or an extruder according to a known method. In this state, the synthetic resin fills the space 8 and also penetrates into the seam 4, but if this filling pressure is maintained, the resin liquid passes through the seam 4 and reaches the upper surface of the midsole 2. It oozes out and eventually flows out from around the midsole 2 into the gap (previously provided) between the mold 7 and the midsole 2, and finally forms a film 9 over the entire upper surface of the midsole 2. In this state, the mold is appropriately cooled, and after the resin has solidified, the mold 6.7 is removed, and the state shown in the cross section of FIG. Skin 1! An electrostatic shoe in which J9 is formed on the upper surface of the midsole 2 is obtained. When these shoes are worn, static electricity charged on the human body is transmitted from the wide area of the sole of the foot to the outsole 1 via the membrane 9 and the resin at the seams 4, and is discharged to the ground.

(Effects of the Invention) The present invention is constructed as described above in detail, and when the outsole made of a conductive synthetic resin is molded by injection or extrusion molding, 9 leather edges are formed on the circumferential side of the midsole. The synthetic resin liquid oozes out from the seams when folded and sewn and flows onto the upper surface of the insole, forming a film on the upper surface of the insole. This film is not created in a separate process, but is formed naturally by simply maintaining the pressure during injection or extrusion molding of the outsole, so there is no need for particularly high costs.

In addition, since this film is formed on the entire or most part of the upper surface of the insole, it has a large contact area with the sole of the foot, and can quickly and reliably dissipate electrical charges from the human body through the resin in the seams on the outsole. can.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway perspective view of an electrostatic shoe showing an embodiment of the present invention, FIG. 2 is a front sectional view of the same, and FIG. 3 is an explanatory diagram of a method of forming an outsole. Explanation of the main parts of the diagram 1 - Outsole 2 - Insole 3 - 9 Leather 4 - Seam 5 - 9 Leather edge 6. L-Mold 8-Space 9-Coating

Claims (1)

[Claims] A method for manufacturing shoes in which the edge of the upper is bent and sewn to the circumferential side of the midsole, and a resin outsole is molded on the underside of the midsole by injection or extrusion molding, in which the outsole is molded. In addition to injecting conductive synthetic resin into the mold to form the outsole,
By maintaining this injection pressure, the conductive synthetic resin oozes out from the seam between the upper and the midsole to the upper surface of the midsole, and a film of the conductive synthetic resin is formed on the upper surface of the midsole. A method for manufacturing electrostatic shoes characterized by: