JPS62275401A - Conductive vibrationproof 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 Detailed Description of the λ Invention [Industrial Application Field] The present invention provides anti-vibration properties that prevent static electricity from accumulating on clothing, the human body, etc., and absorb and reduce vibrations generated by walking. This invention relates to conductive anti-vibration shoes.

[Problems to be solved by conventional technology and the invention] Conventionally, factories where accidents caused by static electricity are a problem, such as semiconductor factories, have taken various measures to prevent static electricity. As countermeasures against the static electricity generated during manufacturing, anti-static shoes, anti-static gloves, anti-static shoes, etc. are used, and these are essential in semiconductor factories.

On the other hand, in the IC industry, the degree of integration has increased in recent years, and L
With the advancement of SI and ultra-LSI, many production processes involve highly precise machining.

Under these circumstances, stricter vibration prevention measures have been required for IC production equipment. Vibrations that affect IC production equipment include vibrations from outside the building,
Continuous slight vibrations, vibrations emitted from production equipment and peripheral equipment,
There are vibrations caused by workers walking, and many of these vibrations have been prevented to an almost negligible extent through various conventional prevention measures. How to prevent this is a major issue. In particular, low-frequency vibrations of 1 to 5 Hz generated by workers' walking are close to the frequency of movement that has the most adverse effect on production equipment, and it has become a major issue to prevent low-frequency vibrations caused by walking. Conventionally, as a countermeasure against walking vibrations, a method of creating a vibration-isolating structure on the floor of a production factory has been adopted, but sufficient vibration isolation is not achieved and the cost is high.Therefore, a low-cost and effective vibration-isolating method has been developed. was desired.

[Means for solving problems]

The present invention addresses the above points! ! The purpose of this invention is to provide conductive anti-vibration shoes with excellent anti-static properties and anti-vibration properties.

That is, the present invention provides at least a cover, a conductive midsole, an elastomer layer provided on the inner and/or outer side of the midsole, and a conductive layer provided on the outside of the midsole. The insole is at least partially exposed on the inner surface of the shoe, and the conductive layer is at least partially in contact with the insole and at least partially grounded. This article focuses on conductive anti-vibration shoes.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

FIGS. 1 and 2 show an embodiment of the conductive anti-vibration shoe of the present invention, in which 1 is a cover and 2 is an insole. An elastomer layer 3 is provided on the heel portion of the inner surface of the midsole 2, and a conductive layer 4 is provided on the outer surface of the midsole 2 in contact with the midsole 2. is configured.

The jacket 1 is made of woven fabric, non-woven fabric, knitted fabric, natural leather, PvC leather, synthetic leather, artificial leather, etc. The midsole 2 is made of a conductive material. As the conductive insole 2, for example, an insole fabric used for ordinary footwear that is made conductive is used, and any of the commonly used methods for imparting conductivity can be used. Can be adopted. The insole 2 may be, for example, conductive thread, copper wire or other metal wire woven or sewn into it, conductive resin or conductive ink impregnated, or metal pieces such as metal studs attached. Conductive rubber, conductive elastomer for the inner sole fabric,
For example, after laminating a conductive fabric or the like, a part of the insole fabric is removed so that the conductive rubber, conductive elastomer, or conductive fabric comes into direct contact with the foot. The elastomer layer 3 is an elastomer that has a large loss coefficient (taδ) in the low frequency range, especially vibrations of about 1 to 5 Hz caused by human walking, and has excellent absorption of walking vibration energy, and has appropriate elasticity as a shoe sole material. You can use whatever you have. Further, the elastomer layer 3 may be made of foam for the purpose of improving comfort and fit, as long as it does not lose its ability to absorb walking and photographing energy. Examples of the elastomer forming the elastomer layer 3 include butyl rubber, halogenated butyl rubber, natural rubber, polynorbornene, chloroprene, phthalene rubber, and styrene rubber.
Examples include phtadiene rubber, stele/-phthanene-styrene block copolymer, styrene-isoprene-styrene block copolymer, polyether urethane, polyester urethane, ethylene-vinyl acetate copolymer, polyvinyl chloride, etc. It is not limited to. In addition, these elastomers are appropriately mixed so that they have characteristics that increase the loss coefficient knee δ and efficiently absorb walking vibration energy. It can be used in combination with submersible substances, bituminous substances, etc.

It is necessary that the conductive layer 4 is configured such that at least a portion thereof is in contact with the midsole 2 and at least a portion thereof is grounded. The conductive layer 4 is made of rubber such as NBR, CR, NR15B R, polyether polyurethane, polyester polyurethane, polyvinyl chloride, etc., coated with metal powder, metal oxide powder, carbon powder, gold, carbon fiber, carbon fiber, or metal coating. It is composed of a compound K containing conductive materials such as glass beads, an antistatic agent, and a surfactant. The electrical resistance value of the conductive layer 4 is preferably within the range of having sufficient conductivity and preventing occurrence of electric shock, and is 1.0X10' to 1.
．． Approximately 0x10'Ω is preferable.

The elastomer layer 3 is not limited to being provided on the inner surface of the inner sole 2 as described above, but is also provided on the outer surface of the inner sole 2 as shown in FIGS. A layer 4 can also be provided, and can also be provided on both the outer and inner sides of the midsole. Furthermore, 3 layers of elastomer
The elastomer 13 is not limited to being provided only on the heel part, but can also be provided on the heel part and the stepping part as shown in FIGS. S, 6, 7, and 8. When provided on both sides, walking footage can be absorbed more effectively, but in either case, at least a portion of the insole 2 is exposed to the inner surface of the shoe,
In addition, it is necessary that the midsole 2 and the conductive layer 4 are in contact with each other at least in part.

9 and 10 show a further different embodiment, in which a conductive layer 4 having a plurality of columnar protrusions 5a is provided in contact with the midsole 2 with the columnar protrusions 5a on the outside, and further from above the conductive layer 4. The single layer of elastomer 3 is provided so that the end surface of the columnar projection 5a can be in contact with the ground. FIGS. Figures 13 and 14 show an embodiment in which a protrusion 6b extends in the front-rear direction of the shoe. 15 and 16 show an embodiment in which the entire heel part of the bottom part is made of a single layer of elastomer 3, and the other part of the bottom part is made of a conductive layer 4; FIGS. 17 and 1
FIG. 8 shows an embodiment in which a plurality of elastomer layers 3 and conductive layers 4 are alternately provided on the outer surface side of the midsole 2.

In the case of the shoes shown in FIGS. 15, 16, 17, and 18 above, the portion where the elastomer layer 3 is used may be the conductive layer 4, and the portion where the conductive layer 4 is made may be the elastomer 13. .

19 and 20, a conductive layer 4 having a ridge 7 that follows the outer shape of the sole is provided in contact with the midsole 2, and an elastomer is placed in a recess surrounded by the ridge 7 of the conductive layer 4. 21 and 22, an embodiment in which a single layer 3 is provided, in which an elastomer layer 3 having a through hole corresponding to the protrusion 6eK of the conductive layer 4 is provided in contact with the outer surface of the midsole 2, FIGS. 23 and 24 show an embodiment in which the protrusion 6c of the conductive layer 4 is inserted into the through hole so that the protrusion 6c is in contact with the inner sole 2, as shown in FIGS.
This is a modification of the embodiment shown in FIG. 22, in which the protrusion 6C is replaced by a columnar protrusion 5b.

In each of the above embodiments, a shoe is constructed from a shoe cover 1, an insole 2, an elastomer layer 3, and a conductive layer 4.
As long as it does not impede the flow of electricity from the foot to the midsole to the conductive layer and does not violate the purpose of the present invention, any insole material, midsole core material, or other materials conventionally used as convex materials for shoe parts can be used. .

Further, the shape, number, etc. of the protrusions and ridges of the conductive layer are not limited to those shown in the above embodiments, but can be any shape and number.

The conductive anti-vibration shoes of the present invention are based on the California method, St.I.J.
It can be manufactured using either the engineering method or the handmade method.

Hereinafter, the present invention will be explained in more detail by giving specific examples.

Example 1, Comparative Example 1 A conductive fabric woven with metal fibers was used as the inner sole, and a polynorbornene elastomer having the composition shown below was used as the elastomer layer.
Ω polyvinyl chloride (contains antistatic agent as a conductive material)
Shoes having the shapes shown in FIGS. 7 and 8 were manufactured using the California method. Tests were conducted on the anti-vibration performance and anti-static performance of this shoe and a general rubber sole as a comparative example.

Polynorbornene elastomer blend Polynorbornene (manufactured by Nippon Zeon ■) 200 parts by weight Carplex #1120 (white carbon)
10 #Precipitated barium sulfate (filler)
300g Hi-Resin #75 (organic reinforcing agent)
80N zinc flower
5 Actiblast 1
1 S7 1 1 Vibration-proofing properties are measured by a constant microtremor big amplifier sensor f-MTKV-I that detects the vibrations generated when walking on a conductive floor in a clean room of a semiconductor factory while wearing the shoes of the present invention and conventional rubber soles.
Equipped with C and MTKH-IC, t7? Measurements were made using a vibration measuring machine (manufactured by Seishin Giken ■), and the measured data was analyzed using a data analyzer as a deviation width for each frequency. Second result
It is shown in Figure 5. In addition, when I first worked in the same clean room where the above test was conducted while wearing the rubber sole, my body was charged with 7000V of static electricity after 30 minutes. When the shoes of the present invention were then put on in the charged state, the static electricity became Ov after 1 second.

〔Effect of the invention〕

In the conductive anti-vibration shoe of the present invention, at least a portion of the conductive insole is exposed on the inner surface of the shoe, and at least a portion of the conductive layer at the bottom is in contact with the insole, and at least a portion of the conductive layer is in contact with the insole. Since the part is grounded, static electricity generated on the human body or clothes flows from the foot to the midsole to the conductive layer to the floor, so the human body or clothes are not charged. Furthermore, since a single layer of elastomer is provided on the inner and/or outer sides of the midsole, vibration energy caused by walking can be absorbed and reduced.

Therefore, the conductive anti-vibration shoes of the present invention are resistant to static electricity and vibration.
For example, they are useful as work shoes in IC, LSI, and VLSI manufacturing factories, and can contribute to reducing the occurrence of defective products due to static electricity and vibration.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and include FIGS. 1, 3, and 5.
Fig. 7, Fig. 9, Fig. 11, Fig. 13, Fig. 15,
17, 19, 21, and 23 are longitudinal cross-sectional views showing different embodiments of the conductive anti-vibration shoe of the present invention, FIG. 2 is the same as FIG. 1, and FIG. 4 is the same as that of the third embodiment. , Figure 6 corresponds to Figure 5, Figure 8 corresponds to Figure 7, Figure 10 corresponds to Figure 9, and Figure 12 corresponds to Figure 1.
Figure 1, Figure 14 is Figure 13, Figure 16 is Figure 15, Figure 18 is Figure 17, Figure 20 is Figure 19, Figure 2.
Figure 2 is from Figure 21, and Figure 24 is from Figure 23, respectively.
FIG. 25 is a chart showing the vibration damping test results of the shoes of Example 1 and Comparative Example 1, showing the magnitude of amplitude with respect to frequency.

Claims (1)

[Claims] At least, the bottom part includes a cover, a conductive midsole, an elastomer layer provided on the inner surface side and/or the outside surface side of the midsole, and a bottom portion having a conductive layer provided on the outside surface side of the midsole. Conductive anti-vibration shoes, characterized in that at least a portion of the insole is exposed on the inner surface of the shoe, and at least a portion of the conductive layer is in contact with the insole and at least a portion is grounded. .