JP4247402B2 - Antistatic shoes and method for manufacturing antistatic shoes - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to an antistatic shoe and a method of manufacturing an antistatic shoe . More specifically, the present invention relates to an antistatic shoe for casual use having a simple two-layer structure of an insole and a sole, and a method for manufacturing such an antistatic shoe .
[0002]
[Prior art]
The term “electrostatic antistatic shoe” used in the present invention is broadly defined as an antistatic shoe suitable for daily use assuming a narrowly antistatic antistatic shoe defined in JIS T8103.
[0003]
When a human body moves such as walking, if a substance with a different charge train is rubbed, frictional static electricity is generated, or when attaching or detaching clothes, peeling static electricity is generated and the human body is charged. If the electrostatic charge of this human body is discharged at a place that handles various flammable gases, vapors, liquids, powders, dusts, or mixtures thereof, films, various coating machines, electronic parts, etc., the sparks cause explosions, fires, Causes accidents due to human shock. It also attracts dust and pollen to the body, causing rough skin and allergies. Also, touching a metal such as a doorknob may cause a discharge shock.
[0004]
Antistatic shoes or electrostatic shoes have been developed for the purpose of preventing such accidents and effects on the human body. This type of anti-static shoes should be (a) that a current of 1 mA or more should not flow even if it comes in contact with a 200V class live wire. (B) The charge of the human body escapes to the ground. (C) To prevent accidents such as explosions, fires, and electric shocks by making the discharge energy smaller than the minimum ignition energy even in a flammable gas, even if it is discharged between the human body and the earth. It is intended to prevent rough skin and allergies.
[0005]
JIS 8103-2001 (electrostatic charging shoes) defines the resistance value of the antistatic shoes for such purposes as follows.
1.0 × 10 ⁵ ≦ R * ≦ 1.0 × 10 ⁹
*: Performance as an antistatic shoe (electric resistance R (Ω) per piece)
[0006]
Conventionally, various antistatic shoes that conform to this JIS standard have been proposed. Many of them are more focused on the original purpose of safety and work shoes than design. Conductive rubber with grounding protrusions on the sole or metal, carbon, and antistatic agent. Is used for the bottom or a part of the bottom.
[0007]
For example, in Japanese Patent Laid-Open No. 60-158802, in an electrostatic shoe using a conductor for the insole, one end of the conductor is in contact with the conductor in the insole and the other end is exposed on the outer bottom surface of the outsole. An electrostatic shoe in which a necessary number of metal wires or electrical conductivity are embedded through the bottom of the table is disclosed.
[0008]
Japanese Patent Application Laid-Open No. 58-136302 discloses an electrostatic grounding circuit in which a through hole is provided in a shoe sole, a coil spring is passed, a human body side electrode is attached to the shoe sole upper surface, and is connected to the upper portion of the coil spring.
[0009]
In Japanese Patent Application Laid-Open No. 8-154704, the bottom is a heated rubber having an antistatic property, the partial bottom is a heated rubber having an epoxidized natural rubber as an essential component, and the lower surface appears on the ground contact surface of the main bottom. A shoe sole is disclosed.
[0010]
Japanese Patent Laid-Open No. 62-201101 discloses a conductive footwear bottom in which a part of the outer bottom made of conductive rubber is a highly conductive vulcanized rubber.
[0011]
The above-mentioned shoe soles are safety / work shoes for preventing static electricity that are mainly used in offices. They emphasize function rather than design, and are not of a type that can be worn casually for everyday use. .
[0012]
Accordingly, it is necessary to impart an antistatic function to casual shoes represented by slip-on type shoes such as moccasins and loafers.
[0013]
[Problems to be solved by the invention]
The problem to be solved by the invention is to provide a method for efficiently imparting a conductive function to a shoe comprising an upper, an insole, and an outsole.
[0014]
Another problem to be solved by the invention is to provide an antistatic shoe that imparts a conductive function to the upper and is bonded and integrated with a sole made of a conductive material by injection molding.
[0015]
Yet another problem to be solved by the invention is to provide an antistatic shoe which imparts a conductive function to the upper and is bonded and integrated with a sole made of a conductive material by hand bonding.
[0016]
[Means for Solving the Problems]
Means for solving the above problem is that, in a shoe composed of an upper, an insole, and an outsole, a conductive material is used for the upper of the upper, and the outer stitch is applied with conductive yarn. When the skin surface material and the lining material are sewn, while the upper surface material, the lining material and the insole are pierced and sewn with the conductive thread, the front foot is stroveled and the back foot is sewn. This is an antistatic shoe that is joined and integrated with a bottom made of a conductive material by injection molding.
[0017]
Another means for solving the above problem is a method of manufacturing an antistatic shoe,
(I) In shoes consisting of the upper, insole, and outsole, use conductive woven fabric for the upper
(B) When the upper is suspended, the upper back made of conductive woven fabric is cut into a shorter length than the upper, and the upper back is completely placed inside the outer periphery of the upper shell. thing,
(C) Putting an outer peripheral stitch with a conductive thread in the hanging white;
(D) Electrostatic charging including sewing the upper shell backing and the upper shell material, applying a conductive adhesive to the suspended bottom, and joining and integrating with the bottom made of conductive material. It is a method of manufacturing prevention shoes.
[0018]
Still another means for solving the above problem is a method of manufacturing an antistatic shoe, wherein (a) the shoe is composed of an upper, an insole, and a sole, (B) When the upper is suspended, the upper lining made of conductive woven fabric is cut to be shorter than the upper, and the upper lining is To completely fit inside the outer peripheral edge of the material, (c) to put an outer peripheral stitch with conductive thread in the hanging white;
(D) Static electricity prevention, including sewing the upper shell backing and the upper shell material, applying a conductive adhesive to the bottom of the suspension, and joining and integrating with the bottom made of conductive material. In the method of manufacturing a shoe, when a peripheral stitch is stitched, it is stitched together with a conductive material having a predetermined shape.
[0019]
Currently, various conductive woven fabrics and conductive nonwoven fabrics have been proposed. These are all expensive. Therefore, in order to impart antistatic performance to shoes, the manufacturing cost of the entire shoe is reduced, in other words, the amount of conductive woven fabric is reduced, and the physical properties such as the strength of the shoe are not reduced. It is necessary to devise a technique that efficiently provides antistatic performance.
[0020]
An example of the conductive woven fabric that can be used in the present invention is a conductive component uniform fiber. This type of fiber includes metal fibers, such as stainless steel, which are thinned by passing metal wires repeatedly through dies, acrylic fibers, rayon, carbon fibers obtained by firing carbonized pitch fibers, acrylic fibers, rayon, quinol fibers, vinylon. There are activated carbon fibers obtained by carbonizing and activating fibers.
[0021]
Another example of the conductive woven fabric that can be used in the present invention is a conductive component-coated fiber. This type of fiber includes a metal-coated fiber in which the surface of the organic fiber is plated or coated with a metal by a vacuum deposition method, a conductive resin-coated organic fiber in which an organic layer in which conductive fine particles are dispersed is formed on the surface of the organic fiber, There are concentric composite fibers having conductive fine particles coated on the surface using a composite spinning technique, and fibers containing a metal compound surface layer in which a metal compound is impregnated and impregnated on the surface of an organic fiber and then fixed by a chemical reaction.
[0022]
Another example of the conductive woven fabric that can be used in the present invention is a conductive component composite type fiber. For this type of fiber, a composite fiber composed of a conductor-containing polymer obtained by composite spinning using a polymer in which conductive fine particles are dispersed as a core component, a blend of conductive fine particle dispersed polymer, or a multi-core composite spinning There is a composite fiber composed of a low melting point metal obtained by composite spinning of a low melting point metal and a composite component.
[0023]
Other conductive woven fabrics that can be used in the present invention include a slit yarn including a metal foil obtained by sandwiching and slitting a metal foil such as aluminum with a polymer or a film.
[0024]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is an explanatory view for explaining a method of manufacturing an example of the antistatic shoe of the present invention. As shown in FIG. 1-A, the antistatic shoe 1 of the present invention has an upper 2 and an upper lining 3 made of a conductive woven fabric, and a sole 4 made of an electrically conductive material. It is joined by injection molding.
[0025]
1-B and FIG. 1-C are exploded views showing the manufacturing method. As shown in FIG. 1-B, the upper 2 of the upper 2 and the upper 3 of the conductive woven fabric are stitched with the outer periphery 5 by the conductive yarn, and the upper 2 of the upper 2 and the conductive woven fabric. The backing 3 is sewn.
[0026]
After the upper 2 and the sole 4 made of conductive material are joined together by injection molding to complete the shoe, the sole 4 made of conductive material and the stitch 5 are in contact with each other. The static electricity charged to the inside is discharged from the inside of the body → the leather backing 3 made of a conductive woven fabric → the outer periphery stitch 5 made of a conductive yarn → the bottom 4 made of a conductive material → the ground.
[0027]
FIG. 1-C is a detailed exploded view showing the suspended bottom 6. As shown in FIG. 1-C, when the upper 2 is sutured to the insole 7, the front foot, which is subjected to a greater load during injection molding, is stitched with the strobe 8 and the rear foot is stitched with the main stitch 9. .
[0028]
In this case, if a conductive thread is used for the strobe stitch 8 and / or the main stitch 9, the upper 2 and the strob stitch 8 and / or the main stitch 9 with the conductive thread are formed with the bottom 4 made of a conductive material. Since it is in contact with the body, static electricity charged in the body is changed from the body to the back lining 3 made of the conductive woven fabric → the strobe 8 and / or the main sewing 9 with the conductive thread → the bottom 4 made of the conductive material. → It is discharged to the ground.
[0029]
FIG. 2 is a bottom view of the hanging of another example of the antistatic shoe of the present invention. As shown in FIG. 2, in the suspended bottom surface 13 of this example, the upper backing 3 made of a conductive woven fabric is shorter than the upper 2 and is completely inside the outer periphery of the upper 2. Is in the box. The outer periphery stitch 15 is put with the conductive wire 14 to the hanging white 14, and the upper shell 3 and the upper shell 2 are stitched. Next, a conductive adhesive is applied to the bottom surface and joined to the bottom 4 made of a conductive material. With such a structure, the static electricity charged in the body is discharged from the body → the back lining material 3 made of conductive woven fabric → the conductive adhesive → the bottom 4 made of conductive material → the ground.
[0030]
In this example, when it is difficult to contact the outer periphery stitch 15 and the bottom 4 made of a conductive material, a conductive material of a predetermined shape, for example, a strip-shaped conductive nonwoven fabric is put together when the outer periphery stitch 15 is sewn. It is preferable to sew.
[0031]
【The invention's effect】
According to the first aspect of the present invention, in a shoe mainly composed of an upper, an insole, and an outsole, a conductive material is used for the upper of the upper, and an outer stitch is applied with conductive yarn. The skin surface material and the skin lining material are stitched together, while the skin surface material, the skin lining material, and the insole are pierced and sewn with a conductive thread, and are integrally joined to the bottom of the conductive material by injection molding. By forming a conductive thread, the outer periphery stitches directly contact the bottom of the conductive material to form a conductive path, and the upper surface material, upper surface material and insole are sewn together. Thus, a conductive path is formed in contact with the bottom of the conductive material, and static electricity charged in the body can be continuously and quickly released to the ground plane without impairing the function of the shoe.
[0032]
Further, according to the invention described in claim 1, when the upper shell material, the upper shell backing material, and the midsole are pierced and sewn with the conductive thread, the forefoot portion is stroveled to be suspended during the injection molding. A conductive material that can receive the load applied to the forefoot when the bottom part is suspended in the last mold, and that is connected via a conductive thread in which the upper shell material, upper leather backing material, and midsole are sewn together. A conductive path is formed in contact with the bottom of the body, and static electricity charged in the body can be continuously and quickly released to the ground surface without impairing the function of the shoe.
[0033]
According to the second aspect of the present invention, in the manufacturing method by hand-sticking of shoes mainly composed of the upper, the insole, and the outsole, the conductive weave that becomes shorter than the upper surface material when suspended. Since the cloth is used for the shell backing and the shell backing is completely accommodated within the outer peripheral edge of the upper shell, the lifting operation is simplified.
[0034]
According to the third aspect of the present invention, when the outer peripheral stitch is stitched together, the conductive path is further expanded and the discharge efficiency is improved by stitching together with a predetermined shape, for example, a strip-shaped conductive nonwoven fabric.
[0035]
[Brief description of the drawings]
BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is an explanatory view showing a production method of Example 1 of the present invention.
FIG. 1A is an overall view of a first embodiment of the present invention.
FIG. 1B is a partial perspective view of the first embodiment of the present invention.
FIG. 1C is a bottom view of the suspension of the first embodiment of the present invention.
FIG. 2 is a bottom view illustrating a manufacturing method according to a second embodiment of the present invention.
[Explanation of symbols]
1 Antistatic shoes
2 Crust
3 Shell lining
4 bottom
5 Peripheral stitch
6 Suspended bottom
7 Insole
8 Strobe bell stitching
9 stitches
10 Antistatic shoes
11 Suspended bottom
12 Conductive insole
13 Antistatic shoes
14 Hanging white
15 Peripheral stitch

Claims (3)

In a shoe composed of the upper, the midsole, and the bottom, a conductive material is used for the upper and the outer surface is stitched with a conductive thread. Stitches, and on the other hand, when the upper skin material, upper leather lining material and insole are pierced and stitched with conductive thread, the front foot is stroveled, the rear foot is main stitched, and made of conductive material by injection molding Antistatic shoes that are integrated with the bottom. A method of manufacturing antistatic shoes,
(I) In shoes consisting of the upper, insole, and outsole, use conductive woven fabric for the upper
(B) When the upper is suspended, the upper lining made of conductive woven fabric is cut shorter than the upper, and the upper lining is completely placed within the outer periphery of the upper surface. thing,
(C) Putting an outer peripheral stitch with a conductive thread in the hanging white;
(D) Electrostatic charging including sewing the upper shell backing and the upper shell material, applying a conductive adhesive to the suspended bottom, and joining and integrating with the bottom made of conductive material. Method of manufacturing prevention shoes . 3. The method for producing an antistatic shoe according to claim 2, wherein when the outer peripheral stitch is stitched, the outer stitch is sewn together with a conductive material having a predetermined shape.

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