EP0875164A1 - Construction inferieure de chaussure absorbant l'énergie pour chaussures de sécurité - Google Patents

Construction inferieure de chaussure absorbant l'énergie pour chaussures de sécurité Download PDF

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Publication number
EP0875164A1
EP0875164A1 EP98107271A EP98107271A EP0875164A1 EP 0875164 A1 EP0875164 A1 EP 0875164A1 EP 98107271 A EP98107271 A EP 98107271A EP 98107271 A EP98107271 A EP 98107271A EP 0875164 A1 EP0875164 A1 EP 0875164A1
Authority
EP
European Patent Office
Prior art keywords
wall
energy absorption
section
substructure according
absorption element
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.)
Granted
Application number
EP98107271A
Other languages
German (de)
English (en)
Other versions
EP0875164B1 (fr
Inventor
Karl Götze
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.)
Otter Schutz Gesellschaft fuer Entwicklung und Vertrieb Persoenlicher Schutzausruestungen mbH
Original Assignee
Otter Schutz Gesellschaft fuer Entwicklung und Vertrieb Persoenlicher Schutzausruestungen mbH
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Filing date
Publication date
Application filed by Otter Schutz Gesellschaft fuer Entwicklung und Vertrieb Persoenlicher Schutzausruestungen mbH filed Critical Otter Schutz Gesellschaft fuer Entwicklung und Vertrieb Persoenlicher Schutzausruestungen mbH
Publication of EP0875164A1 publication Critical patent/EP0875164A1/fr
Application granted granted Critical
Publication of EP0875164B1 publication Critical patent/EP0875164B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • A43B7/32—Footwear with health or hygienic arrangements with shock-absorbing means
    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B21/00—Heels; Top-pieces or top-lifts
    • A43B21/24—Heels; Top-pieces or top-lifts characterised by the constructive form
    • A43B21/26—Resilient heels
    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B21/00—Heels; Top-pieces or top-lifts
    • A43B21/24—Heels; Top-pieces or top-lifts characterised by the constructive form
    • A43B21/30—Heels with metal springs

Definitions

  • the present invention relates to a shoe substructure, especially for safety shoes, with a Sole construction with a protection against impulses or impacts Injuries arranged in the heel or heel area Energy absorption element.
  • Footwear for the commercial sector is meant to be in case falls to protect against impact-related injuries, in particular heel fractures, an energy absorbing Show shoe base.
  • EN 344 demands a value of 20 joules
  • the former national DIN 4843 one Value of 30 joules was required.
  • the different values are due on the one hand to the fact that so far in certain countries faced technical problems, the higher To achieve value. On the other hand, it is also due to different ones Measuring methods used in the norms for determining energy consumption are described. Basically but it can be assumed that an energy intake of at least 30 joules provides better protection than 20 Joule.
  • a shoe substructure of the type mentioned is known for example from EP-A-0 749 705.
  • This well-known Construction has already proven itself quite well, because they are both comfortable and comfortable good energy absorption capacity of about 30 joules (measured according to EN 344, section 5.10).
  • This is a Damping element made of relatively soft elastic material with a relatively harder one, but still also existing elastically compressible material Combined energy absorption element.
  • the present invention is based on the object the energy absorption behavior with good wearing comfort to improve still further, also including a economic manufacturing process should be possible.
  • the energy absorption element a stiff elastic deformation behavior with a force / displacement characteristic that initially steeply rising and then gradually decreasing Has initial section.
  • This invention Energy absorption element is preferred as a flat insert trained and in a soft elastic material (especially PU) existing sole layer embedded, so that by superimposing the force / displacement characteristics of the rigid elastic Energy absorption element and the soft elastic Sole layer a resulting characteristic curve such arises that results from the area under the resulting Characteristic curve energy in the range of about 30 to 40 joules, in particular around 35 joules.
  • the invention is based on the knowledge that it is common with elastic materials because of their deformation behavior at most possible with special, complex measures is to achieve an energy consumption of over 30 joules. Because have such elastically compressible materials typically a progressive characteristic curve with a relatively flat initial increase. Since the energy (or work) derives from the Area under the force / displacement characteristic (path integral of the Force), the first part of the total deformation path consumed with little energy, practically wasted. Since the in the sales area of Shoes maximum possible deformation path with about 15 mm is extremely low anyway, that goes for the flat one Climb remaining path despite the then progressive climb no longer out to still target the energy value of about 30 joules.
  • the energy absorption element according to the invention can advantageously be designed so that a resulting characteristic curve arises in the overall effect of the sole structure, which increases very quickly to a maximum permissible force when deformed and retains approximately this value of the force when deformed further. In theory, almost the maximum energy could be absorbed as a product of power.
  • the special characteristic of the energy absorption element according to the invention can preferably be achieved constructively be that the energy absorption element from a flat, especially with a circular contour like a disc Hollow body with a first, e.g. lower, i.e. one Bottom of the sole (profile side) facing wall and a second, e.g. upper, facing a shoe upper Wall is formed, with at least one of the two walls arched essentially in the shape of a bowl, in particular is frustoconical.
  • the bowl-shaped wall needed for deformation due to a kind of arch effect initially a relatively high force (steep climb the characteristic curve), and according to a specific deformation path the rise then becomes correspondingly flatter; it can even be achieved that the characteristic curve is one of the steep rising and then degressively flattening initial section subsequent, sloping curve section.
  • the bowl-shaped or frustoconical shape acts for this Wall of the hollow body according to the principle of a children's toy well-known "crack frog" (jumping leaf or Disc spring).
  • a safety shoe 1 in section, which consists of an upper shoe 2 and a substructure 4.
  • the substructure consists essentially of a sole structure 6, which in turn is a conventional profile sole 8 and one made of soft elastic material Has sole layer 10.
  • This sole layer 10 is with such safety shoes usually a steel midsole 12 embedded.
  • This steel midsole serves as a puncture-proof insert (e.g. according to DIN 32768), around the foot, especially in the construction area in front of pointed objects, such as nails, etc.
  • the sole structure 6 is in the heel or heel area equipped with an energy absorption element 16.
  • the present Invention is particularly concerned with the design and arrangement of this energy absorption element 16, which now in particular with reference to FIGS. 2 to 4 or 4a to be explained in more detail.
  • the energy absorption element 16 as a flat insert trained and in particular made of polyurethane (PU) existing sole layer 10 embedded.
  • This insert part is of a flat, preferably with a circular contour (see Fig. 3) approximately discus-like (Fig. 2,4 and 4a) Hollow body 18 formed.
  • This hollow body 18 consists of a first, lower in this embodiment, the Bottom of the sole (profile side) facing wall 20 and a second, here upper, facing the shoe upper 2 Wall 22.
  • the first wall 20 is preferably in the essentially flat, while the second wall 22 has an approximately cup-shaped contour. This will enclosed a cavity 24 between the two walls 20, 22.
  • the shell-shaped second wall 22 preferably has the shape of a truncated cone with a flat conical Circumferential section 26 and a central, in essential plane center distance 28.
  • This middle section 28 runs approximately parallel to one through the Sole structure 6 in the heel area defined foot rest area; see Fig. 1.
  • the two walls 20, 22 of the Hollow body 18 preferably formed as two separate molded parts and here in the region of their peripheral edges - preferably via a positive or non-positive snap connection 30 (like a can lid closure) - so closely connected that the inner cavity 24 embedded in the elastic sole layer 10 according to FIG. 1 Hollow body 18 when embedding or foaming free of the surrounding material of the sole layer 10 remains. This prevents the deformation behavior influenced by material penetrating into the cavity 24 becomes.
  • the snap connection 30 is shown in FIG. 4 by a circumferential Edge web 32 of the first wall 20 is formed, wherein the upper wall 22 engages in the edge web 32 in a latching manner.
  • both walls 20 and 22 each have an edge web 32 or 32a, which interlock with one another.
  • Energy absorption element 16 has this a force / displacement characteristic curve illustrated in FIG. 5 with a initially steeply rising and then degressive flattening initial section 34. At this initial section 34 is followed by a second curve section 36, the - as shown - preferably a sloping course owns. This second curve section 36 of the force / displacement characteristic of the energy absorption element 16 then goes finally into a progressively increasing end section 38 over.
  • the transition from the start section 34 to the second curve section 36 is approximately 1/3 of the maximum deformation path s max and preferably a force F 1 .
  • the maximum deformation path s max is approximately 10 to 20 mm, in particular 10 to 15 mm.
  • the force F 1 is in the range of approximately 3,000 to 4,000 N.
  • the transition from the second curve section 36 to the end section 38 is then approximately 2/3 of the maximum deformation path s max and preferably a force F 2 which is in the range of approximately 1,000 to 3,000 N.
  • the maximum deformation path s max is preferably achieved at a force F 3 of approximately 5,000 N.
  • the deformation or suspension behavior of the energy absorption element 16 can be influenced in a wide range by design. 4 and 4a, it is expedient if the flat-conical peripheral section 26 of the second wall 22 has a wall thickness which changes from the outer peripheral edge in the direction of the center, preferably increasing. 4a, the wall thickness in the region of the outer peripheral edge is denoted by d 1 , while the wall thickness at the transition to the central section 28 is illustrated by d 2 .
  • the flat central section 28 is preferably formed with a wall thickness d ′ which corresponds approximately to the (larger) wall thickness d 2 of the peripheral section 26.
  • the characteristic curve can be effectively influenced by these dimensional relationships in particular. For example, as an alternative to the course illustrated in FIG. 5, it can also be achieved that the second curve section 36 runs approximately linearly and approximately parallel to the path axis (abscissa). Furthermore, of course, a more clearly decreasing course can also be achieved.
  • the energy absorption element 16 is preferably seated directly on the steel midsole 12 expediently engages an extension 42 of the first wall 20 for relative position fixation in an opening in the midsole 12 a.
  • the steel midsole 12 simultaneously with the energy absorption element 16 in the Sole layer 10 are embedded, resulting in a simple Manufacturing leads.
  • the energy absorption element is located in its upper area 16 also directly in connection with the insole 14.
  • the insole 14 covers the central one Center section 28 of the second wall 22 such that the Material of the elastic sole layer 10 - see Fig. 1 - only in the area of the flat-conical peripheral section 26 with wedge-like decreasing thickness radially from the outside inwards between the energy absorption element 16 and the insole 14 is arranged.
  • the energy absorption element lies 16 with direct investment contact directly between the Steel midsole 12 and the insole 14. Therefore lies the foot - apart from the midsole 14 and one possibly additionally provided insole - directly on the energy absorption element 16.
  • Characteristic curve of the energy absorption element 16 comes into effect, especially in the initial area of the deformation path to achieve a high energy consumption.
  • the characteristic curve of the Energy absorption element 15 of course also by the used Affect material.
  • a sprayable is preferred thermoplastic with a hardness about Range from 60 to 70 Shore-D used. Suitable for this is for example polyamide (PA, e.g. PA6), polypropylene (PP) or polyoxymethylene (POM).
  • PA polyamide
  • PP polypropylene
  • POM polyoxymethylene
  • the present invention leads - except for an improved one Energy consumption behavior - also at an inexpensive Manufacturability.
  • the energy absorption element 16 is the same for all shoe sizes, i.e. with the same size, can be formed. Hereby only a single set of molding tools is required. Handling when embedding the energy absorption element is very simple because of its preferred Connection with the steel midsole well fixed and very is positioned exactly.
  • the energy absorption element is located 16 immediately below a sole or footbed-like insert part 44.
  • This insert part 44 expediently consists of a relatively dimensionally stable, but elastically deformable plastic material.
  • Fig. 7 an embodiment is shown in which the energy absorption element 16 with the central section 28 of the second Wall 22 bears against the underside of the insert part 44.
  • the invention is not based on the illustrated and described Embodiments limited, but also includes all designs having the same effect in the sense of the invention. Furthermore, the invention is not yet based on the Claim 1 defined combination of features limited, but can also be by any other combination of certain characteristics of all of the individual characteristics disclosed be defined. This means that basically practically every single feature of claim 1 omitted or by at least one elsewhere in the registration disclosed individual feature can be replaced. To that extent is claim 1 only as a first attempt at formulation to understand for an invention.

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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)
EP98107271A 1997-04-24 1998-04-21 Construction inferieure de chaussure absorbant l'énergie pour chaussures de sécurité Expired - Lifetime EP0875164B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE29707398U DE29707398U1 (de) 1997-04-24 1997-04-24 Energieaufnehmende Schuh-Unterkonstruktion für Sicherheitsschuhe
DE29707398U 1997-04-24

Publications (2)

Publication Number Publication Date
EP0875164A1 true EP0875164A1 (fr) 1998-11-04
EP0875164B1 EP0875164B1 (fr) 2003-01-15

Family

ID=8039472

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98107271A Expired - Lifetime EP0875164B1 (fr) 1997-04-24 1998-04-21 Construction inferieure de chaussure absorbant l'énergie pour chaussures de sécurité

Country Status (5)

Country Link
EP (1) EP0875164B1 (fr)
AT (1) ATE230942T1 (fr)
DE (2) DE29707398U1 (fr)
DK (1) DK0875164T3 (fr)
PT (1) PT875164E (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1998640A1 (fr) * 2006-03-30 2008-12-10 Li-ning Sports (Shanghai) Co., Ltd. Système d'amortissement des chocs réglable et chaussure pourvue d'un tel système
US11330860B2 (en) * 2009-06-22 2022-05-17 1158990 B.C. Ltd. Springs for shoes

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITVR20080128A1 (it) * 2008-11-20 2010-05-21 Gianfranco Zocca Sistema di ammortizzamento di suole per calzature
US9578920B2 (en) * 2014-05-13 2017-02-28 Ariat International, Inc. Energy return, cushioning, and arch support plates, and footwear and footwear soles including the same
IT201700075302A1 (it) * 2017-07-05 2019-01-05 U Invest S R L Scarpa di sicurezza energizzante.

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2919928A1 (de) * 1979-05-17 1980-11-27 Schabsky Atlas Schuhfab Sicherheitsschuhwerk und verfahren zu seiner herstellung
WO1981003602A1 (fr) * 1980-06-19 1981-12-24 T Mcmahon Chaussure concue biomecaniquement
DE3111186A1 (de) * 1981-03-21 1982-09-30 Phoenix Ag, 2100 Hamburg Unfallverhuetungsstiefel
FR2583269A1 (fr) * 1985-06-14 1986-12-19 Agulhon Michel Chaussures de securite et procedes de fabrication
EP0749705A1 (fr) 1995-06-21 1996-12-27 Otter Schutz Gesellschaft für Entwicklung und Vertrieb und persönlicher Schutzausrüstungen mbH Structure de la partie inférieure d'une chaussure, en particulier d'une chaussure de sécurité

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2919928A1 (de) * 1979-05-17 1980-11-27 Schabsky Atlas Schuhfab Sicherheitsschuhwerk und verfahren zu seiner herstellung
WO1981003602A1 (fr) * 1980-06-19 1981-12-24 T Mcmahon Chaussure concue biomecaniquement
DE3111186A1 (de) * 1981-03-21 1982-09-30 Phoenix Ag, 2100 Hamburg Unfallverhuetungsstiefel
FR2583269A1 (fr) * 1985-06-14 1986-12-19 Agulhon Michel Chaussures de securite et procedes de fabrication
EP0749705A1 (fr) 1995-06-21 1996-12-27 Otter Schutz Gesellschaft für Entwicklung und Vertrieb und persönlicher Schutzausrüstungen mbH Structure de la partie inférieure d'une chaussure, en particulier d'une chaussure de sécurité

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1998640A1 (fr) * 2006-03-30 2008-12-10 Li-ning Sports (Shanghai) Co., Ltd. Système d'amortissement des chocs réglable et chaussure pourvue d'un tel système
EP1998640A4 (fr) * 2006-03-30 2010-01-20 Li Ning Sports Shanghai Co Ltd Système d'amortissement des chocs réglable et chaussure pourvue d'un tel système
US11330860B2 (en) * 2009-06-22 2022-05-17 1158990 B.C. Ltd. Springs for shoes

Also Published As

Publication number Publication date
DE59806905D1 (de) 2003-02-20
DK0875164T3 (da) 2004-06-01
PT875164E (pt) 2003-06-30
DE29707398U1 (de) 1997-11-27
ATE230942T1 (de) 2003-02-15
EP0875164B1 (fr) 2003-01-15

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