EP3817615B1 - Ermüdungsschutzschuh - Google Patents

Ermüdungsschutzschuh

Info

Publication number
EP3817615B1
EP3817615B1 EP19755435.5A EP19755435A EP3817615B1 EP 3817615 B1 EP3817615 B1 EP 3817615B1 EP 19755435 A EP19755435 A EP 19755435A EP 3817615 B1 EP3817615 B1 EP 3817615B1
Authority
EP
European Patent Office
Prior art keywords
antifatigue
insert
safety shoe
shoe
safety
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.)
Active
Application number
EP19755435.5A
Other languages
English (en)
French (fr)
Other versions
EP3817615A1 (de
Inventor
Pier Franco Uzzeni
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.)
U Power Group SpA
Original Assignee
U Power Group SpA
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 U Power Group SpA filed Critical U Power Group SpA
Priority to EP25212646.1A priority Critical patent/EP4663061A3/de
Priority to HRP20251618TT priority patent/HRP20251618T1/hr
Priority to RS20260081A priority patent/RS67685B1/sr
Publication of EP3817615A1 publication Critical patent/EP3817615A1/de
Application granted granted Critical
Publication of EP3817615B1 publication Critical patent/EP3817615B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B7/00—Footwear with health or hygienic arrangements
    • A43B7/32—Footwear with health or hygienic arrangements with shock-absorbing means
    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B13/00—Soles; Sole-and-heel integral units
    • A43B13/02—Soles; Sole-and-heel integral units characterised by the material
    • A43B13/12—Soles with several layers of different materials
    • A43B13/125—Soles with several layers of different materials characterised by the midsole or middle layer
    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B23/00—Uppers; Boot legs; Stiffeners; Other single parts of footwear
    • A43B23/08—Heel stiffeners; Toe stiffeners
    • A43B23/081—Toe stiffeners

Definitions

  • the present invention relates to an antifatigue safety shoe.
  • all safety shoes comprise an upper provided with a sufficiently structured, and therefore rigid, safety toe cap at the shoe toe to withstand impacts or crushing, protecting the user's foot.
  • Safety shoes are currently known which are provided with a layered sole internally comprising an insert made of an elastic material adapted to make placing the foot on the ground more comfortable during walking and in general during all the activities in which the user moves continuously.
  • footwear in the state of the art which comprises a sole provided with an elastic insert made of thermoplastic polyurethane foam, which provides a soft and dynamic cushioning that returns energy during movements.
  • ergonomic antifatigue mats are often installed in workplaces, which are made with materials and thicknesses that provide an optimal balance between compression and resistance for the operator standing on them.
  • these mats allow the muscular effort to be distributed evenly, relieving the stress on ligaments, joints and muscles, while absorbing and dispersing the micro-shocks to which the musculo-skeletal system is subjected, even in the limited movements that occur while maintaining the standing position.
  • ergonomic antifatigue mats allow stimulating blood circulation in the lower limbs and the lower back.
  • the ergonomic antifatigue mats must continuously be subjected to maintenance and cleaning in order to ensure the necessary safe working conditions for the operators.
  • the ergonomic antifatigue mats are subject, also because of their exposure to external agents, to the decay of the antistatic properties that they generally possess when they are newly installed.
  • the aim of the present invention is to provide an antifatigue safety shoe which allows ensuring the wearer a high level of comfort, particularly in conditions of prolonged standing.
  • an object of the present invention is to provide an antifatigue safety shoe that has the same ergonomic features for the wearer as those provided by ergonomic antifatigue mats.
  • a further object of the invention is to provide an antifatigue safety shoe that is capable of providing the broadest guarantees of reliability and safety when used.
  • Another object of the invention is to provide an antifatigue safety shoe that is also easy to make and is economically competitive when compared with the Prior Art.
  • an antifatigue safety shoe generally indicated with the reference numeral 1, comprises an upper 2 provided, at the shoe toe, with a safety toe cap 4 and a layered sole 3 associated with the upper 2.
  • the layered sole 3 comprises a lower layer 5 adapted to come into contact with the ground, an intermediate layer 6 associated with the upper 2 and with the lower layer 5, respectively, and an upper layer 9.
  • an antifatigue insert 7 is inserted, having an average transversal thickness of at least 6 millimetres adapted to unload the weight of the user under static conditions.
  • the antifatigue insert 7 extends over substantially the whole sole of the antifatigue safety shoe 1.
  • the antifatigue insert 7 extends over the whole sole of the antifatigue safety shoe 1, except for the shoe toe portion 40 where the safety toe cap 4 is housed.
  • the antifatigue insert 7 has a thickness of at least 8 millimetres at the rear zone P of the safety shoe 1, i.e. substantially at the heel of the user's foot.
  • the antifatigue insert 7 has a thickness of at least 6 millimetres at the middle zone C of the safety shoe 1, i.e. substantially at the arch of the user's foot.
  • the antifatigue insert 7 has a thickness of at least 4 millimetres at the front zone A of the safety shoe 1, i.e. substantially at the toe of the user's foot.
  • the static support effect provided by the antifatigue insert 7 is accentuated at the user's heel, where the weight of the same is most unloaded, and gradually decreasing towards the user's toes.
  • the antifatigue insert 7 can be embedded, at least laterally and below, in the intermediate layer 6, possibly with the exception of some lateral portions thereof exposed through lateral windows 12, where present, as explained below.
  • the intermediate layer 6 comprises a plurality of windows 12 distributed along the lateral surfaces of the intermediate layer 6 between the rear zone P and the front zone A of the antifatigue safety shoe 1, so that the antifatigue insert 7 exposes its lateral surfaces thereof through said windows 12.
  • the windows 12 provided on the lateral surfaces of the intermediate layer 6 make the antifatigue insert 7 located inside the intermediate layer 6 itself visible, and at the same time also perform the technical function of allowing the deformation towards the outside of the material of which this antifatigue insert 7 is made, so as to accommodate the deformation of the material following the compression imposed by the operator while standing in an upright position and thus unloading the operator's weight under static conditions.
  • the intermediate layer 6 is made of a polyurethane material, such as for example a lowdensity polyurethane foam.
  • the lower layer 5 is made of a polyurethane material, a nitrile material or a combination of these two materials.
  • the lower layer 5 can for example be made of a compact high-density polyurethane material, or of a thermoplastic polyurethane material, or still of a nitrile rubber.
  • the lower layer 5 comprises a base 50 and a plurality of projections 51 projecting with respect to the base 50.
  • These projections 51 can be made of a material having a density substantially lower than the density of the material with which the base 50 is made.
  • the components of the layered sole 3 are made of antistatic materials, in order to guarantee antistatic properties to the shoe 1.
  • the components of the layered sole 3 can be made of dielectric materials, in order to guarantee insulating properties to the shoe 1.
  • the lower layer 5 has anti-slip properties.
  • the safety shoe 1 is advantageously equipped with a safety toe cap 4 provided with holes configured to guarantee the transpiration of the foot.
  • a protective membrane 11 is provided for closing the holes present on the cap 4, so as to allow both the transpiration and the protection of the user's foot.
  • the upper layer 9 completely covers the antifatigue insert 7.
  • this upper layer 9 comprises, or is directly defined by, an anti-perforation lamina.
  • this anti-perforation lamina extends substantially along the entire length of the intermediate layer 6, so as to completely cover the sole of the foot of the user wearing the shoe.
  • the upper layer 9 is constituted by an anti-perforation lamina placed at the top in direct contact with the antifatigue insert 7.
  • the upper layer 9 consists of an anti-perforation lamina that completely covers the antifatigue insert 7 and extends substantially along the entire length of the intermediate layer 6, so as to completely cover the sole of the foot of the user wearing the shoe.
  • the intermediate layer 6 comprises a plurality of windows 12 distributed along the lateral surfaces of the shoe 1, and such as to allow the deformation towards the outside of the material with which this antifatigue insert 7 is made, allows the antifatigue insert 7 to effectively exercise its function of absorbing the static load, compensating for the greater rigidity of the layered sole 3 given by the presence of the anti-perforation lamina.
  • This anti-perforation lamina is preferably made of non-metallic material, for example a resin-based polyester or similar material.
  • the antifatigue insert 7 is made of a material comprising at least one polyol polymer.
  • This polyol polymer is preferably a polyol polyester.
  • the polyol polymer can also be a polyether polyol.
  • the antifatigue insert 7 can be made of a bicomponent material comprising at least one polyol polymer, such as for example a polyol polyester or a polyether polyol, and an isocyanate.
  • the isocyanate is a diphenylmethane diisocyanate, and still more preferably a 4,4'-diphenylmethane diisocyanate.
  • the bicomponent material further comprises an amine catalyst.
  • the amine catalyst is an aliphatic tertiary amine.
  • the bicomponent material comprises said polyol polyester polymer and said isocyanate in a ratio, respectively, of 100:54 parts by weight.
  • the bicomponent material comprises said polyether polyol polymer and said isocyanate in a ratio, respectively, of 100:52 parts by weight.
  • the antifatigue insert 7 is made of a polyurethane obtained from the polymerization of a polyol, preferably polyester, with an isocyanate which differs from the thermoplastic polyurethane foams mentioned in the introduction with reference to the known safety shoes due to a lower elasticity, also due to the absence of foaming agents.
  • the antifatigue insert 7 is made of a non-expanded polyurethane, preferably not of the thermoplastic type.
  • the material with which the antifatigue insert 7 is made advantageously has a density, measured according to the ISO 845 method, comprised between 300 and 360 Kg/m 3 , preferably between 320 and 360 Kg/m 3 , and still more preferably about 340 Kg/m 3 .
  • this material has a "Shore A" hardness measured according to the DIN 53 505 method which is advantageously comprised between 20 and 25 and preferably equal to 22 or 23.
  • this material has a tensile strength, measured according to the DIN 53 504 method, advantageously comprised between 1.5 and 3.5 MPa, and preferably comprised between 2.8 and 3.0 MPa.
  • this material has an elongation at break, measured according to the DIN 53 504 method, comprised between 200 and 500%, and preferably greater than 400%.
  • the material with which the antifatigue insert 7 is made has a significantly lower resilience than the elastic inserts in thermoplastic polyurethane foam mentioned with reference to the known safety shoes.
  • the resilience of the antifatigue insert 7 is according to the invention lower than 35%, and preferably comprised between 15% and 30%.
  • thermoplastic polyurethane foams used for the elastic inserts of known safety shoes is generally greater than 50%.
  • This resilience value can be measured according to the measurement standard DIN 53 512, ("Determining the rebound resilience of rubber using the Schob pendulum") and represents the relationship between the energy returned by an elastomer subjected to an impact and the energy applied to this elastomer in the same impact.
  • the density values of the material with which the antifatigue insert 7 is made also contribute to this behaviour, as the hardness and/or tensile strength and/or elongation at break values as defined above do.
  • the antifatigue insert 7 is made starting from polyol polyester, the absolute compatibility with the polyurethane material with which the intermediate layer 6 of the layered sole 3 is formed, where the antifatigue insert 7 is housed, and therefore the moulding and assembly procedures of the components that make the layered sole 3 itself are particularly simplified.
  • the average thickness of at least 6 millimetres of the antifatigue insert 7, in combination with the materials with which this antifatigue insert 7 is made, as described above, allows the antifatigue safety shoe 1 to have the same ergonomic antifatigue properties that ergonomic antifatigue mats feature.
  • the antifatigue safety shoe according to the present invention achieves the intended aim and objects, since it has ergonomic characteristics comparable to those of ergonomic antifatigue mats, but unlike ergonomic antifatigue mats it does not require expensive interventions for structural installation and subsequent maintenance.
  • Another advantage of the antifatigue safety shoe according to the invention is that the ergonomic action is exercised continuously over time as long as the operator is wearing the shoe, but also in any location, regardless of the nature of the ground on which the user places his feet.
  • the antifatigue safety shoe thus conceived is susceptible to many modifications and variants, all falling within the same inventive concept; furthermore, all details can be replaced by technically equivalent elements.
  • the materials used, as well as the dimensions, can be of any type according to the technical requirements.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Epidemiology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
  • Diaphragms And Bellows (AREA)

Claims (15)

  1. Anti-Ermüdungs-Sicherheitsschuh (1), umfassend
    ein Obermaterial (2), bei dem an der Schuhspitze eine Sicherheitszehenkappe (4) und eine mehrschichtige Sohle (3), welche mit dem Obermaterial (2) verbunden ist, vorgesehen sind, wobei die mehrschichtige Sohle (3) eine untere Schicht (5), welche ausgebildet ist, mit dem Boden in Kontakt zu kommen, eine Zwischenschicht (6), welche mit dem Obermaterial (2) bzw. der unteren Schicht (5) verbunden ist, und eine obere Schicht (9) aufweist,
    dadurch gekennzeichnet,
    dass in die Zwischenschicht (6) eine Anti-Ermüdungs-Einlage (7) eingebettet ist, welche eine durchschnittliche transversale Dicke von mindestens 6 Millimetern aufweist und ausgebildet ist, das Gewicht des Benutzers unter statischen Bedingungen zu entlasten, wobei die Anti-Ermüdungs-Einlage (7) aus einem Material hergestellt ist, dessen elastische Zähigkeit, gemessen nach der Messnorm DIN 53512 weniger als 35 % beträgt.
  2. Anti-Ermüdungs-Sicherheitsschuh (1) nach Anspruch 1,
    dadurch gekennzeichnet,
    dass sich die Anti-Ermüdungs-Einlage (7) im Wesentlichen über die gesamte Sohle des Anti-Ermüdungs-Sicherheitsschuhs (1) erstreckt und
    dass die Anti-Ermüdungs-Einlage (7) aus einem Material hergestellt ist, welches eine Bruchdehnung, gemessen nach DIN 53504, zwischen 200 und 500% aufweist.
  3. Anti-Ermüdungs-Sicherheitsschuh (1) nach Anspruch 1 oder 2,
    dadurch gekennzeichnet,
    dass die Anti-Ermüdungs-Einlage (7) eine Dicke von mindestens 8 Millimetern im hinteren Bereich des Anti-Ermüdungs-Sicherheitsschuhs (1), eine Dicke von mindestens 6 Millimetern im mittleren Bereich des Anti-Ermüdungs-Sicherheitsschuhs (1) und eine Dicke von mindestens 4 Millimetern im vorderen Bereich des Anti-Ermüdungs-Sicherheitsschuhs (1) aufweist.
  4. Anti-Ermüdungs-Sicherheitsschuh (1) nach einem oder mehreren der vorhergehenden Ansprüche,
    dadurch gekennzeichnet,
    dass die Zwischenschicht (6) eine Vielzahl von Fenstern (12) aufweist, welche entlang der Seitenflächen der Zwischenschicht (6) zwischen dem hinteren Bereich und dem vorderen Bereich des Anti-Ermüdungs-Sicherheitsschuhs (1) verteilt sind, wobei die Anti-Ermüdungs-Einlage (7) ihre Seitenflächen durch die Fenster (12) freilegt.
  5. Anti-Ermüdungs-Sicherheitsschuh (1) nach einem oder mehreren der vorhergehenden Ansprüche,
    dadurch gekennzeichnet,
    dass die Anti-Ermüdungs-Einlage (7) aus einem Material besteht, welches mindestens ein Polyolpolymer aufweist.
  6. Anti-Ermüdungs-Sicherheitsschuh (1) nach einem oder mehreren der vorhergehenden Ansprüche,
    dadurch gekennzeichnet,
    dass die Anti-Ermüdungs-Einlage (7) aus einem Bikomponentenmaterial hergestellt ist, welches ein Polyolpolymer und ein Isocyanat aufweist.
  7. Anti-Ermüdungs-Sicherheitsschuh (1) nach einem oder mehreren der Ansprüche 5 oder 6,
    dadurch gekennzeichnet,
    dass das Polyolpolymer ein Polyolpolyester ist.
  8. Anti-Ermüdungs-Sicherheitsschuh (1) nach einem oder mehreren der Ansprüche 5 bis 7,
    dadurch gekennzeichnet,
    dass das Polyolpolymer ein Polyetherpolyol ist.
  9. Anti-Ermüdungs-Sicherheitsschuh (1) nach einem oder mehreren der Ansprüche 6 bis 8,
    dadurch gekennzeichnet,
    dass das Isocyanat ein Diphenylmethandiisocyanat ist.
  10. Anti-Ermüdungs-Sicherheitsschuh (1) nach einem oder mehreren der vorhergehenden Ansprüche,
    dadurch gekennzeichnet,
    dass die Anti-Ermüdungs-Einlage (7) aus nicht expandiertem Polyurethan besteht.
  11. Anti-Ermüdungs-Sicherheitsschuh (1) nach einem oder mehreren der vorhergehenden Ansprüche,
    dadurch gekennzeichnet,
    dass sich die Anti-Ermüdungs-Einlage (7) über die gesamte Sohle des Anti-Ermüdungs-Sicherheitsschuhs (1) erstreckt, mit Ausnahme des Schuhspitzenbereichs (40), in dem die Sicherheitszehenkappe (4) angeordnet ist, und
    dass die Anti-Ermüdungs-Einlage (7) aus einem Material besteht, welches eine Zugfestigkeit, gemessen gemäß dem DIN 53 504 Verfahren, zwischen 1,5 und 3,5 MPa aufweist.
  12. Anti-Ermüdungs-Sicherheitsschuh (1) nach einem oder mehreren der Ansprüche 2 bis 11,
    dadurch gekennzeichnet,
    dass die obere Schicht (9) aus einer Anti-Perforations-Folie besteht, welche den Anti-Ermüdungseinsatz (7) vollständig bedeckt und sich im Wesentlichen über die gesamte Länge der Zwischenschicht (6) erstreckt, so dass sie die Fußsohle des Schuhbenutzers vollständig bedeckt.
  13. Anti-Ermüdungs-Sicherheitsschuh (1) nach einem oder mehreren der vorhergehenden Ansprüche,
    dadurch gekennzeichnet,
    dass die obere Schicht (9) aus einer Anti-Perforations-Lamina gebildet ist, welche oberhalb in direktem Kontakt mit der Anti-Ermüdungs-Einlage (7) angeordnet ist.
  14. Anti-Ermüdungs-Sicherheitsschuh (1) nach einem oder mehreren der Ansprüche,
    dadurch gekennzeichnet,
    dass die Anti-Ermüdungs-Einlage (7) aus einem Material mit einer elastischen Zähigkeit zwischen 15 % und 30 %, gemessen gemäß der Messnorm DIN 53512, hergestellt ist.
  15. Anti-Ermüdungs-Sicherheitsschuh (1) nach einem oder mehreren der vorhergehenden Ansprüche,
    dadurch gekennzeichnet,
    dass die Anti-Ermüdungs-Einlage (7) aus einem Material besteht, welches eine Dichte zwischen 320 und 360 kg/m3 aufweist, vorzugsweise etwa 340 kg/m3, gemessen gemäß dem Verfahren ISO 845.
EP19755435.5A 2018-07-06 2019-07-03 Ermüdungsschutzschuh Active EP3817615B1 (de)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP25212646.1A EP4663061A3 (de) 2018-07-06 2019-07-03 Sicherheitsschuh gegen ermüdung
HRP20251618TT HRP20251618T1 (hr) 2018-07-06 2019-07-03 Zaštitne cipele protiv umora
RS20260081A RS67685B1 (sr) 2018-07-06 2019-07-03 Zaštitna cipela protiv zamora

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT102018000006999A IT201800006999A1 (it) 2018-07-06 2018-07-06 Scarpa di sicurezza antifatica.
PCT/IB2019/055688 WO2020008393A1 (en) 2018-07-06 2019-07-03 Antifatigue safety shoe

Related Child Applications (1)

Application Number Title Priority Date Filing Date
EP25212646.1A Division EP4663061A3 (de) 2018-07-06 2019-07-03 Sicherheitsschuh gegen ermüdung

Publications (2)

Publication Number Publication Date
EP3817615A1 EP3817615A1 (de) 2021-05-12
EP3817615B1 true EP3817615B1 (de) 2025-11-19

Family

ID=63762841

Family Applications (2)

Application Number Title Priority Date Filing Date
EP25212646.1A Pending EP4663061A3 (de) 2018-07-06 2019-07-03 Sicherheitsschuh gegen ermüdung
EP19755435.5A Active EP3817615B1 (de) 2018-07-06 2019-07-03 Ermüdungsschutzschuh

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP25212646.1A Pending EP4663061A3 (de) 2018-07-06 2019-07-03 Sicherheitsschuh gegen ermüdung

Country Status (12)

Country Link
EP (2) EP4663061A3 (de)
DK (1) DK3817615T3 (de)
EA (1) EA202190123A1 (de)
ES (1) ES3057589T3 (de)
FI (1) FI3817615T3 (de)
HR (1) HRP20251618T1 (de)
IT (1) IT201800006999A1 (de)
LT (1) LT3817615T (de)
PL (1) PL3817615T3 (de)
PT (1) PT3817615T (de)
RS (1) RS67685B1 (de)
WO (1) WO2020008393A1 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT202000026615A1 (it) * 2020-11-10 2022-05-10 Loris Bolzonello Insieme suola, intersuola, sottopiede di montaggio e inserto per realizzazione di una calzatura

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2738915B2 (ja) * 1995-02-17 1998-04-08 青木安全靴製造株式会社 靴及びその製造方法
US20050268484A1 (en) * 2002-03-15 2005-12-08 Ben Dombowsky Resilient sole insert
US7096605B1 (en) 2003-10-08 2006-08-29 Nike, Inc. Article of footwear having an embedded plate structure
DE102015118251A1 (de) * 2015-10-26 2017-04-27 Elten GmbH Sohle für einen Schuh, insbesondere für einen Sicherheitsschuh, sowie Schuh
IT201700051624A1 (it) * 2017-05-12 2018-11-12 U Invest S R L Scarpa di sicurezza defaticante.

Also Published As

Publication number Publication date
EP3817615A1 (de) 2021-05-12
WO2020008393A1 (en) 2020-01-09
EP4663061A3 (de) 2026-03-04
HRP20251618T1 (hr) 2026-02-13
IT201800006999A1 (it) 2020-01-06
PL3817615T3 (pl) 2026-03-30
EA202190123A1 (ru) 2021-04-06
EP4663061A2 (de) 2025-12-17
FI3817615T3 (fi) 2026-02-03
RS67685B1 (sr) 2026-02-27
PT3817615T (pt) 2026-02-03
ES3057589T3 (en) 2026-03-03
DK3817615T3 (da) 2026-02-09
LT3817615T (lt) 2026-02-10

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