EP0736266A1 - Sicherheitsschuh mit elektrisch leitendem Sohlenaufbau - Google Patents

Sicherheitsschuh mit elektrisch leitendem Sohlenaufbau Download PDF

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Publication number
EP0736266A1
EP0736266A1 EP96104891A EP96104891A EP0736266A1 EP 0736266 A1 EP0736266 A1 EP 0736266A1 EP 96104891 A EP96104891 A EP 96104891A EP 96104891 A EP96104891 A EP 96104891A EP 0736266 A1 EP0736266 A1 EP 0736266A1
Authority
EP
European Patent Office
Prior art keywords
electrically conductive
sock
shaped insert
insole
safety shoe
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP96104891A
Other languages
German (de)
English (en)
French (fr)
Inventor
Günter Nötzold.
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
WL Gore and Associates GmbH
Original Assignee
WL Gore and Associates GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by WL Gore and Associates GmbH filed Critical WL Gore and Associates GmbH
Publication of EP0736266A1 publication Critical patent/EP0736266A1/de
Withdrawn legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B7/00—Footwear with health or hygienic arrangements
    • A43B7/12—Special watertight footwear
    • A43B7/125—Special watertight footwear provided with a vapour permeable member, e.g. a membrane
    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B7/00—Footwear with health or hygienic arrangements
    • A43B7/36—Footwear with health or hygienic arrangements with earthing or grounding means

Definitions

  • the invention relates to a safety shoe with a shaft and a sole structure having at least one outsole and an insole connected to the shaft and which forms an electrical dissipation resistance from the footwell of the shoe to the underside of the sole structure which is within the limits of a predetermined minimum and a predetermined maximum Leakage resistance is, wherein the outsole is constructed with a plastic, which is brought by admixing electrically conductive particles to a specific resistance leading to the required discharge resistance, and wherein there is an electrical connection between the foot interior and the outsole.
  • this capacitor charges. If the person touches live devices, this capacitor charges. If the electrical charge cannot be removed, this can have a disruptive or even damaging effect on electronic devices which the person touches after the electrical charge, and such a charge may also be harmful to the person's body. So that the electrical Charge can be reduced within a reasonable time, the electrical discharge resistance of the sole structure must therefore not exceed a maximum resistance value.
  • Conventional safety shoes of the type specified in the introduction have a sole made of polyurethane (PU), which has been made electrically conductive by admixing electrically conductive particles, such as carbon or graphite particles.
  • PU polyurethane
  • an electrically conductive band is sewn onto the inside of a lining located above the insole. This electrically conductive band extends around the insole so that part of the band is inside the shoe and another part is under the insole and in electrical contact with the conductive PU sole.
  • the insole is perforated in the ball area and a vulcanized mass or plastic mass, which is made electrically conductive by adding carbon particles, is placed on the underside of the insole. In this way there is an electrical discharge through the insole to the conductive PU sole.
  • the insole that is usually present is only a half-sole, that is, it extends in the longitudinal direction of the shoe only from the heel area to the ankle area of the foot and not below the ball of the foot.
  • the upper and the functional layer which is usually part of a lining laminate, are usually connected to one another at the upper shaft end, whereupon the lower ends of the upper and functional layer or lining laminate are then pinched around the underside of the insole.
  • the lasting fold can only be knocked onto the underside of the insole with strong wrinkling, which is particularly true in places with a pronounced curve, such as in particular in the toe area and in the heel area.
  • Extreme small pleats form, especially with small shoe sizes, which have to be glazed (planed away) before an outsole is glued on.
  • the glazing often leads to an injury to the functional layer and thus to the water leakage of the shoe at the injured point.
  • a sock-like insert with a functional layer instead of a functional layer wrapped around the insole with the upper. Since the sock-like insert is not only inside the upper of the upper but also inside, i.e. on the inside of the foot of the insole, the functional layer is not at risk when glazing the gussets of the upper and there is also no risk of water leakage if this is the case with large shoe sizes Upper material only just over the edge of the last and the insole.
  • the invention has for its object to make a safety shoe of the type specified available, which is constructed with a sock-shaped insert with functional layer material and yet allows sufficient electrical dissipation between the foot of the person wearing the safety shoe and the electrically conductive outsole.
  • the high insulation resistance of the functional layer of the sock-shaped insert is bridged or overridden, so that an electrical connection between the foot of the person wearing the safety shoe and the conductive outsole is made possible.
  • the sock-shaped insert has a contact path between the foot interior and the insole at least in the ball area and the insole is constructed at least in the ball area in a manner known per se with electrically conductive material acting through the insole.
  • the insole can either consist entirely of electrically conductive material or only in the ball area.
  • the insole in the ball of the foot area can be provided with a hole which is closed with electrically conductive material.
  • This can either be a piece of material made of electrically conductive material attached to the edge of the insole hole, or the insole hole can also be filled with electrically conductive outsole material when an outsole is molded on.
  • the sock-shaped insert can either be constructed with electrically insulating material which is replaced in the entire sole area or only in the ball area by an electrically conductive material forming the contact path, or can be constructed at least in the ball area or also with electrically conductive functional layer material. In the latter case, the electrical conductivity is achieved by embedding electrically conductive particles, such as carbon or graphite particles.
  • the sock-shaped insert as a whole with electrically insulating material and at least on the Places that are in the area of electrically conductive insole material can be sewn through the sock-shaped insert with electrically conductive thread.
  • the water permeability caused by the stitching through the sock-shaped insert can be eliminated by sealing the seam, which is done at least in the area which is opposite the electrically conductive insole material by means of an electrically conductive adhesive.
  • the sock-shaped insert is usually sewn together from several parts to obtain the desired sock shape.
  • the seams are then sealed on the outside of the sock-shaped insert using a waterproof sweatband.
  • electrically conductive thread for at least part of these seams or for part of one of these seams and to seal at least the electrically conductive seam regions by means of electrically conductive adhesive.
  • An insole can be arranged on the sole area of the sock-like insert in a manner known per se on the inside facing the foot interior. This consists either at least in the ball area of electrically conductive material or it consists entirely of electrically insulating material, in which case it is designed as a half-insole that only extends from the heel area to approximately the ankle area of the foot interior.
  • Materials suitable for the functional layer of the sock-shaped insert include microporous stretched polytetrafluoroethylene (PTFE), as described in US Pat. Nos. 3,953,566 and 4,187,390; stretched PTFE provided with hydrophilic impregnants and / or layers as described in U.S. Patent 4,194,041; breathable polyurethane layers; or elastomers such as copolyether esters and their laminates as described in U.S. Patents 4,725,481 and 4,493,870.
  • PTFE microporous stretched polytetrafluoroethylene
  • the contact path of the sock-shaped insert is to be formed by the fact that the insert itself as a whole or at least in the ball area is electrically conductive, this is achieved by embedding electrically conductive particles, such as graphite particles.
  • electrically conductive particles such as graphite particles.
  • microporous PTFE filled with graphite is used for the electrically conductive functional layer of the sock-shaped insert.
  • FIG. 1 shows a schematic vertical longitudinal section through a safety shoe 11 which has a shaft 13 and a sole structure 15.
  • the sole structure 15 comprises an insole 17, on the lower peripheral region of which a lower end of the upper 13 on the sole side is glued by means of a lasting fold using an adhesive (not shown).
  • An outsole 21 made of electrically conductive plastic is molded onto the underside of the insole 17 and onto the underside of the lasting fold 19.
  • This consists, for example, of polyurethane (PU), which is preferably made electrically conductive by filling it with electrically conductive particles, such as with carbon particles.
  • PU polyurethane
  • a sock-shaped insert 23 which is constructed with a waterproof, water vapor-permeable functional layer, which is usually part of a multilayer laminate which is based on has a lining textile layer on the inside of the functional layer on the foot side and a reinforcing textile layer on the outside of the functional layer remote from the foot.
  • the functional layer consists of a highly insulating plastic with such a high specific electrical resistance that a discharge of electrical charge from the foot 27 to the electrically conductive outsole 21 would be prevented through the functional layer.
  • the sole area or bottom 23a of the sock-shaped insert 23 is replaced by an electrically conductive material, which consists, for example, of a textile or non-woven fabric, which is made conductive by incorporating graphite particles.
  • a shaft part 23b of the sock-shaped insert 23 consists of the insulating functional layer material, for example stretched, microporous polytetrafluoroethylene (PTFE).
  • the bottom 23a of the sock-shaped insert 23 with its shaft part 23b is by means of a seam 26a connected, which is waterproof sealed on the outside of the sock-shaped insert 23 by means of a sweatband 26b.
  • At least the ball area 41 of the insole 17 has electrical conductivity, so that there is an electrical connection between the foot 27 and the electrically conductive outsole 21 from the ball 31 via the electrically conductive bottom 23a of the sock-shaped insert 23 and via the electrically conductive ball area of the insole 17 .
  • the half-insole 25 On the inside of the sole area or bottom 23a of the sock-shaped insert 23 there is a half-insole 25 which does not extend over the entire length of the foot but only from the heel area to approximately the ankle area of the foot 27.
  • the half-insole 25 consists of electrically insulating material Material so that, when extended over the ball of the foot, it would create an insulating barrier between the ball of foot 31 and the electrically conductive ball of foot 41 of insole 17.
  • the bottom 23a of the sock-shaped insert 23 is not replaced by electrically conductive material but is made conductive by incorporating particles made of electrically conductive material, for example graphite particles.
  • the seam 26a and the sweatband 26b are not required.
  • the entire sock-shaped insert 23 consists of electrically conductive material, preferably of microporous PTFE filled with graphite particles.
  • FIG. 2 shows a variant in which an insole 17 and an insole 39 are used, each of which consists of an electrically conductive material.
  • the insole 39 can therefore be designed as a full sole.
  • An overall conductive insole 17 and / or an overall conductive full-insole 39 instead of an insole 17 that is only conductive in the ball area or a half-insole 39 can optionally also be used in the other embodiments of the invention considered here.
  • Fig. 3 shows a third embodiment of the invention, in which the sock-shaped insert 23 is constructed overall with a functional layer of highly insulating plastic with such a high specific electrical resistance that the functional layer leads to a discharge of electrical charge from the foot 27 to the electrically conductive outsole 21 is prevented.
  • this insulating barrier is overcome by sewing through the sock-shaped insert 23, preferably in the form of a zigzag seam, with an electrically conductive thread 28 at least in the ball area. This seam is sealed watertight by means of an electrically conductive adhesive (not shown).
  • the insole 17 is electrically conductive at least in the ball area 41 opposite the seam with the conductive thread 28.
  • a half-insole 25 made of insulating material is provided.
  • part of the seams or at least part of one of the seams, by means of which the sock-shaped insert 23 is sewn together from several parts, is sewn with an electrically conductive thread. At least where such an electrically conductive seam comes into contact with electrically conductive insole material, this seam is sealed by means of electrically conductive adhesive. Other areas of the seam or seams can be sealed with sweatband.
  • FIG. 4 shows a fourth embodiment of the invention, in which a piece is removed from the sock-shaped insert 23 in the ball of the foot and the hole thus created is closed by means of a patch 43 made of electrically conductive material.
  • the patch 43 is sewn to the sock-shaped insert 23, for example with a zigzag seam 44.
  • the insole 17 is provided with an insole hole 33. This was filled with electrically conductive outsole material when the outsole 21 was molded on. In this embodiment, the electrically conductive ball area of the insole 17 is thus simply formed by electrically conductive outsole material.
  • the insole hole 33 has a larger diameter on all sides than the patch 43, so that the seam 44 is sealed by the outsole material filling the insole hole 33.

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  • Health & Medical Sciences (AREA)
  • Epidemiology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
EP96104891A 1995-04-05 1996-03-27 Sicherheitsschuh mit elektrisch leitendem Sohlenaufbau Withdrawn EP0736266A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE29505886U 1995-04-05
DE29505886U DE29505886U1 (de) 1995-04-05 1995-04-05 Sicherheitsschuh mit elektrisch leitendem Sohlenaufbau

Publications (1)

Publication Number Publication Date
EP0736266A1 true EP0736266A1 (de) 1996-10-09

Family

ID=8006482

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96104891A Withdrawn EP0736266A1 (de) 1995-04-05 1996-03-27 Sicherheitsschuh mit elektrisch leitendem Sohlenaufbau

Country Status (3)

Country Link
EP (1) EP0736266A1 (ja)
JP (1) JP3270678B2 (ja)
DE (1) DE29505886U1 (ja)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998001049A1 (en) * 1996-07-04 1998-01-15 W.L. Gore & Associates Gmbh Waterproof footwear
EP1240837A1 (en) * 2001-03-13 2002-09-18 Calzaturificio Play Sport S.r.l. Method for obtaining a waterproof shoe, and shoe obtained thereby
EP1800556A1 (en) * 2005-12-20 2007-06-27 Calzaturificio Valleverde S.p.A. Antistatic sole, shoe with this sole and process for producing this sole
WO2010048496A1 (en) * 2008-10-24 2010-04-29 Porex Corporation Composite ptfe material and applications thereof
US7795346B2 (en) 2003-11-03 2010-09-14 Porex Corporation Sintered porous high melt-flow index materials and methods of making same

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9625763D0 (en) * 1996-12-11 1997-01-29 Shico Uk Limited Anti-static footwear
JP2003088404A (ja) * 2001-09-20 2003-03-25 Achilles Corp 導電性防水靴
JP4841087B2 (ja) * 2001-09-27 2011-12-21 アキレス株式会社 導電性防水靴
DE102011010119A1 (de) 2011-02-02 2012-08-02 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Schutzanzug zur Verwendung in einem Kühlraum
JP6454079B2 (ja) * 2014-04-14 2019-01-16 ミドリ安全株式会社 導電性防水靴の内装体
US10201212B2 (en) * 2016-03-15 2019-02-12 Nike, Inc. Article of footwear with a tensioning system including a guide assembly

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH635234A5 (en) * 1980-04-02 1983-03-31 Eric Empeyta Antistatic sock
DE3447205A1 (de) * 1984-12-22 1986-07-03 Uvex Winter Optik GmbH, 8510 Fürth Antistatischer schuh, stiefel o.dgl.
EP0275644A2 (en) * 1987-01-20 1988-07-27 Japan Gore-Tex, Inc. A water-vapour-permeable waterproof shoe
WO1992020249A1 (en) * 1991-05-17 1992-11-26 Phurness Pty. Ltd. An antistatic shoe sole

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH635234A5 (en) * 1980-04-02 1983-03-31 Eric Empeyta Antistatic sock
DE3447205A1 (de) * 1984-12-22 1986-07-03 Uvex Winter Optik GmbH, 8510 Fürth Antistatischer schuh, stiefel o.dgl.
EP0275644A2 (en) * 1987-01-20 1988-07-27 Japan Gore-Tex, Inc. A water-vapour-permeable waterproof shoe
WO1992020249A1 (en) * 1991-05-17 1992-11-26 Phurness Pty. Ltd. An antistatic shoe sole

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998001049A1 (en) * 1996-07-04 1998-01-15 W.L. Gore & Associates Gmbh Waterproof footwear
EP1240837A1 (en) * 2001-03-13 2002-09-18 Calzaturificio Play Sport S.r.l. Method for obtaining a waterproof shoe, and shoe obtained thereby
US7795346B2 (en) 2003-11-03 2010-09-14 Porex Corporation Sintered porous high melt-flow index materials and methods of making same
EP1800556A1 (en) * 2005-12-20 2007-06-27 Calzaturificio Valleverde S.p.A. Antistatic sole, shoe with this sole and process for producing this sole
WO2010048496A1 (en) * 2008-10-24 2010-04-29 Porex Corporation Composite ptfe material and applications thereof
US8628843B2 (en) 2008-10-24 2014-01-14 Porex Corporation Composite PTFE materials and applications thereof

Also Published As

Publication number Publication date
JP3270678B2 (ja) 2002-04-02
JPH08299017A (ja) 1996-11-19
DE29505886U1 (de) 1996-08-01

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