JPH0477561B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to cloth shoes, and particularly to dust-proof work safety shoes suitable for use in clean rooms and the like.

[Technical background]

In recent years, there has been a strong need for clean rooms in various industries such as the electronic industry, precision industry, pharmaceutical industry, oil refining industry, food industry, printing industry, film manufacturing industry, painting industry, etc. such as semiconductor product manufacturing, and the medical field. It is being

In particular, extremely strict cleanliness is required in the manufacturing process of semiconductor products such as integrated circuits (ICs) and large-scale integrated circuits (LSIs), and how to keep clean rooms clean is important for improving product yields. This is becoming a major issue.

Conventionally, in order to prevent contaminated particles from entering a clean room from outside, a Hepa filter is used to supply clean air into the room, and an air shower is used to remove dust and bacteria from the clothes of occupants. In addition, dust-free materials are also being used for clothes and shoes themselves.

In addition, in certain manufacturing processes for semiconductor products, particularly in wafer processing factories, powerful chemicals are often used, which poses a problem that when chemicals are exposed to them from outside, they penetrate and cause chemical burns.

Furthermore, in semiconductor processes, charging due to static electricity is directly linked to serious accidents, and consideration must be given to this.

By the way, as a measure against dust resistance, the inventor of the present invention has already developed dustproof cloth shoes that are excellent in dust resistance and workability and durability. These cloth shoes are made by integrally combining a sole made of rubber material and a foot cover made of synthetic fiber, and either a fastener for opening and closing is provided from the upper front edge of the foot cover downward, or a conductive material is mixed into the entire sole. The foot cover is made of rubber material, and the foot cover is made of synthetic fiber cloth woven with conductive fibers, which prevents the foot cover from being charged with static electricity.

However, when working using dust-proof cloth shoes with the structure described above, the soft cloth foot covers are directly connected to the soles of the shoes, so when walking, the sides of the foot covers that wrap around the feet can move from side to side. Occasionally, the worker would slip and step on the chemical solution that was scattered on the floor, and the chemical solution would seep into the interior through the fabric, causing chemical burns for the worker and causing sprain accidents. Also,
Since the toe part of the shoe has a sealed structure, it is not only inconvenient to put on and take off the shoe, but also because it is difficult to wash the toe part, foreign matter tends to accumulate there, which becomes a source of dust. Furthermore, although the entire sole of the shoe is made of rubber material mixed with a conductive substance, the antistatic effect is not necessarily sufficient.

[Purpose of the invention]

One object of the present invention is to provide cloth shoes for clean rooms that have improved safety against chemical solutions on the working floor by improving the foot cover structure. Another object of the present invention is to provide cloth shoes for clean rooms that are easy to put on and take off and wash.

Another object of the present invention is to provide cloth shoes for clean rooms that eliminate charging accidents and improve reliability by changing the structure of the conductive member in the sole.

[Summary of the invention]

A brief overview of typical inventions disclosed in this application is as follows.

That is, a sole made of rubber and a foot cover made of synthetic fiber are joined together, and a chemical-resistant reinforcing fabric material is joined along the side surface of the foot cover that contacts the sole, and the toe part inside the foot cover is bonded. A chemical-resistant tongue-like cloth piece is attached to the foot cover, and an opening/closing fastener is provided from the upper front edge of the foot cover to the toe at the top of the sole, making it significantly safer for chemical liquids on the floor. This makes it easier to put on and take off and wash.

〔Example〕

FIG. 1 is a side perspective view showing dustproof safety shoes which are an embodiment of clean room cloth shoes according to the present invention. FIG. 2 is a perspective view of the dust-proof safety shoe shown in FIG. 1, with the zipper lowered and the interior opened, as seen from slightly above the front.

In this embodiment, the sole 1 of the dust-proof safety shoes and the bag-shaped foot cover 2 that covers the foot of the worker have a mutually integrated structure.

The sole 1 is made of amber-colored synthetic rubber called Ame-rubber, and has sufficient thickness to prevent worker's foot fatigue.As shown in Fig. 3, the sole 1 has grooves 3 to prevent slipping on the back side. is formed, and a conductive rubber part 4 (raw rubber mixed with powdered carbon) is formed on a part of the back side.
is formed integrally with the surrounding synthetic rubber portion 5. This conductive rubber portion 4 is electrically connected to conductive fibers woven into a foot cover, which will be described later, via a conductive material 6 provided on the upper surface of the sole.

On the other hand, the foot cover 2 is made of a synthetic fiber such as polyester with conductive fibers 7 made of carbon woven in the horizontal direction (or vertical direction). In order to connect the sole 1 and the foot cover 2, a conductive adhesive is used at the upper edge of the sole, and a bias tape 14 is used to stitch around the periphery.

A chemical-resistant reinforcing cloth material 8 made of thick synthetic fibers surrounds the side surface of the foot cover in contact with the sole of the shoe.
are sewn to the foot cover at the top and bottom at a predetermined height (width), and are joined together with chemical-resistant glue.
Both end joints 9 of this chemical-resistant reinforcing cloth material 8 are provided at positions slightly deviated from the rearmost portion, as shown in FIG.

Inside the foot cover 2, a chemical-resistant tongue-like cloth piece (referred to as tongue) 10 is sewn at one end on the sole of the toe part (see Fig. 2), so as to cover the toe from above. It's getting old.

The foot cover 2 is provided with an opening/closing fastener 11 that extends from the upper end of the front part to the toe.

Further, narrow portions 12 and 13 are provided at the upper end portion and ankle portion of the foot cover 2, respectively. These squeezed parts 12 and 13 are used to hold the foot cover 2 so that it does not slip off the worker's feet during work, and a rubber cord or the like is sewn inside to elastically hold the squeezed parts. ing.

〔effect〕

According to the present invention described above along with the embodiments, the following effects can be obtained.

(1) A foot cover made of synthetic fiber is integrally bonded to a sole made of rubber, and a thick chemical-resistant reinforcing cloth is tightly attached to the side of the foot cover that contacts the sole using bias tape and adhesive. Because they are connected, the worker's feet are safely supported by the thick soles and thick reinforcing fabric, without shifting from side to side during work walking, thus preventing dangerous chemicals from spilling onto the floor. Even if there are chemicals scattered around, safety can be ensured by preventing the chemical solution from penetrating through the thin fabric of the conventional foot cover.

(2) The sole, foot cover, and side reinforcement fabric are integrally and airtightly joined to each other, and the tongue-shaped cloth piece effectively prevents dust from entering the foot cover. It is comfortable to wear, reduces fatigue, and has good workability.

(3) The sole of the shoe is partially equipped with conductive rubber made of carbon that has sufficient conductivity, and is connected to the conductive fibers woven into the foot cover through the conductive material, so there is no possibility of charging accidents due to static electricity. can be effectively prevented. Incidentally, after the cloth shoes have been used for a suitable period of time, the entire foot cover maintains conductivity due to moisture such as sweat emitted from the worker's feet, further increasing the antistatic effect.

(4) Since chemical-resistant tongue-like pieces are provided at the claw feet within the foot cover, the toes can be completely protected against intrusion of chemical solutions through gaps in the fasteners, etc.

(5) Chemical-resistant reinforcement part: Both ends are joined at a position slightly deviated from the rearmost part along the side of the foot cover that contacts the sole, increasing mechanical strength and improving durability.

(6) The opening/closing fastener is provided so that it reaches from the upper front edge of the foot cover to the toe toe, making it easy to remove foreign matter from the toe when putting on and taking off shoes or washing. If an insole or the like is provided, it becomes easy to put in and take out the insole. In particular, the fabric shoes of the present invention, which take into account the ease of washing, can reliably reduce the possibility of introducing dust sources into clean rooms where strict cleanliness is required. Extremely useful as cloth shoes.

Although the invention made by the present invention has been specifically explained based on the examples, the present invention is not limited to the above-mentioned examples, and can be modified in various ways without departing from the gist thereof. For example, the sole 1 and the foot cover 2 may be sewn together with thread, preferably electrically conductive thread.

Furthermore, the foot covers can also be made of materials other than polyester, such as polyamide-based synthetic resins. The conductive fibers can also be made of stainless steel or vapor deposited aluminum, for example.

[Application field]

In the above explanation, the invention made by the present inventor was mainly applied to the field of application of semiconductor products, which is the background of the invention, but it is not limited to this and is applicable to other fields. For example, it can be applied to dustproof shoes used in many fields such as precision industry and chemical industry.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of dust-proof safety shoes, which is an embodiment of clean room cloth shoes according to the present invention. FIG. 2 is a front perspective view of the safety shoe shown in FIG. 1 in a state where the zipper is opened, as seen from slightly above. FIG. 3 is a bottom view of a safety shoe also according to the invention. FIG. 4 is a partial longitudinal sectional view of a safety shoe according to the present invention. 1... Sole, 2... Foot cover, 3... Groove, 4...
... Conductive rubber part, 5 ... Synthetic rubber part, 6 ... Conductive material, 7 ... Conductive fiber, 8 ... Chemical-resistant reinforced cloth material, 9 ... Joint, 10 ... Tongue-shaped cloth piece, 11...
Opening/closing fastener, 12, 13...Aperture part, 14
...Bias tape.

Claims (1)

[Scope of Claims] 1. A shoe sole made of rubber or the like and a foot cover made of synthetic fiber are combined together, and chemical-resistant reinforcement made of thick synthetic fiber is provided along the side surface of the foot cover in contact with the sole. The cloth materials are joined together, and a chemical-resistant tongue-like cloth piece is attached to the toe part inside the foot cover, and an opening/closing fastener is provided from the front upper edge of the foot cover to the toe of the upper part of the sole. Cloth shoes for clean rooms characterized by: 2. The clean room cloth shoe according to claim 1, wherein both ends of the chemical-resistant reinforcing fabric are joined to each other at a position offset from the final side of the foot cover. 3. A part of the sole has a conductive rubber part mixed with a conductive substance, and the foot cover has conductive fibers woven into it, and the conductive rubber part and the conductive fibers are mutually interwoven. The clean room cloth shoe according to claim 1, which is electrically connected.