EP0334299A1 - Steigeisen - Google Patents

Steigeisen Download PDF

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Publication number
EP0334299A1
EP0334299A1 EP89105056A EP89105056A EP0334299A1 EP 0334299 A1 EP0334299 A1 EP 0334299A1 EP 89105056 A EP89105056 A EP 89105056A EP 89105056 A EP89105056 A EP 89105056A EP 0334299 A1 EP0334299 A1 EP 0334299A1
Authority
EP
European Patent Office
Prior art keywords
crampon
longitudinal
frame
members
angle
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Withdrawn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
EP89105056A
Other languages
German (de)
English (en)
French (fr)
Inventor
Michael Saumweber
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.)
Georg Gabriel & Sohn
Original Assignee
Georg Gabriel & Sohn
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 Georg Gabriel & Sohn filed Critical Georg Gabriel & Sohn
Publication of EP0334299A1 publication Critical patent/EP0334299A1/de
Withdrawn legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43C—FASTENINGS OR ATTACHMENTS OF FOOTWEAR; LACES IN GENERAL
    • A43C15/00—Non-skid devices or attachments
    • A43C15/06—Ice-gripping devices or attachments, e.g. ice-spurs, ice-cleats, ice-creepers, crampons; Climbing devices or attachments, e.g. mountain climbing irons
    • A43C15/068—Climbing devices or attachments, e.g. glacier crampons, mountain climbing irons

Definitions

  • the invention relates to a crampon of the type mentioned in the preamble of claim 1.
  • the present invention thus relates to a crampon with at least one frame made of longitudinal members, which consist of flat strip-shaped frame parts with a substantially rectangular cross section and longitudinal cross members, with front and / or vertical teeth being arranged on the longitudinal and / or transverse members , as well as fasteners for fastening the crampon to the shoe.
  • a crampon according to the preamble of claim 1 which consists of a largely rigid frame.
  • This so-called “Chouinard” crampon consists of a closed two-part frame, which is composed of a rear and a front part, which are screwed together to overlap. The length of the Overlap determines the length of the entire crampon and thus the adaptation to a certain shoe size.
  • the longitudinal members of the "Chouinard” crampon essentially have a flat horizontal rectangular or L-profile with a very short leg. The side members are often perforated for the greatest possible adjustability. The two frame halves are then screwed through these holes with continuous clamping screws.
  • a third crampon of the type in question a so-called changing system crampon, consists essentially of longitudinal spring steel strips with a rectangular cross section, each of which is fastened in pairs to a front part or a rear part of the crampon and overlaps in the longitudinal direction. Jagged girder bridges are clamped on these longitudinal members in the axial direction between the front and rear parts of the crampon. The axial connection between the front and rear part of the crampon takes place via a connecting element that is resilient in the axial direction. With this crampon, the side members are often drilled for assembly reasons.
  • An improved generic crampon therefore has longitudinal members with a rectangular cross-sectional profile, the main axis of which extends vertically. This arrangement decisively improves the bending moment and thus the bending stiffness in the longitudinal direction, but the bending resistance moment and the bending strength about the vertical axis decrease transversely to the longitudinal direction to the same extent. Since the longitudinal members of this crampon are also perforated to ensure the greatest possible adjustment, this crampon is highly prone to breakage when bending moments occur about the vertical axis transverse to the longitudinal axis of the crampon.
  • Crampons which are mainly used for alpine activities, are extremely mechanically stressed, especially when climbing in rock, but also when walking on steeply inclined slopes that can be covered with gravel, snow or ice. If the load does not affect all vertical serrations evenly, as is usually the case, the crampon is stressed primarily by bending moments. Stress peaks occur particularly when the bending stress occurs dynamically, for example when jumping from a low height onto an essentially horizontal terrain section or over a crevasse. The bending loads mainly occur in two main load directions. The greatest bending moment acts in the longitudinal axis of the crampon, i.e. about an axis that is perpendicular to the longitudinal axis of the crampon and perpendicular to the vertical axis.
  • the rigidity of the side members against bending stress is determined in addition to the material parameters of the side members, above all by the bending moment of resistance of the side members.
  • the bending resistance moment W is proportional to the product of the width b and the height h of the cross-section of the side member, the height h being square comes in.
  • the width b corresponds to the width of the longitudinal beam and the height h to the thickness of the longitudinal beam.
  • the longitudinal beams are inclined by an angle ⁇ along their longitudinal axis
  • the calculation of the moment of resistance W 'now valid must be based on a geometric height h' and a geometric width b '. These sizes correspond to the geometric projection of the side member into the corresponding vertical planes. This increases, especially at small angles of inclination ⁇ , the height h 'increases much faster than the width b', so that, also by squaring the height h ', the bending moment of resistance W' and thus the bending stiffness of the side member increases.
  • the inclined position ensures a relatively high bending stiffness in both main load directions. In other words, the angle of inclination ⁇ and thus the inclination of the side member directly determines the bending stiffness and thus also the bending strength of the entire crampon in both main load directions.
  • the side members are usually provided with recesses in the form of through holes or elongated holes, be it for assembly reasons, for reasons of optimal adaptation to different shoe sizes, or for reasons of weight saving.
  • these holes weaken the force-transmitting cross-sectional area on the one hand and, on the other hand, frequently lead to an overload of the remaining cross sections due to their notching effect and thus to the crampon breaking.
  • the neutral line In the case of conventional longitudinal beams according to the prior art with a rectangular cross-section, the main axis of which lies in the plane of the frame, the neutral line, ie the, falls when there is a bending load in the main loading direction Area of the cross-section that is not subject to tensile or compressive stresses together with the main axis of the cross-sectional area. This means that the areas with the highest tensile or compressive stress run parallel to the neutral line and that the cross-sectional areas that are most loaded are weakened by the through holes that run perpendicular to the neutral line.
  • the neutral line also extends at a certain angle to the horizontal frame plane and at a certain angle to the main axis of the cross-sectional area, so that the cross-sectional areas that are most distant from the neutral line have the highest tensile or Pressure load no longer, or can only be weakened to a small extent by the through holes.
  • the greater the angle of inclination ⁇ the more the maximum force-transmitting areas of the cross section of the longitudinal members migrate into the corners of the cross-sectional area, while in the case of flat longitudinal members the maximum force transmitting areas extend parallel to the main axis of the cross-sectional area. Due to the inclination of the side members, the areas weakened by bores are removed from the stress zones transmitting maximum force, which results in a significantly improved break resistance of the crampon.
  • an inclination of the longitudinal members along their longitudinal axis ensures a significantly improved stiffness and break resistance of the crampon.
  • the dimensions of the side members that is to say the width and / or the thickness, can be reduced while the rigidity and break resistance remain the same, as a result of which considerable weight savings can be achieved.
  • the designer has the option of choosing the angle of inclination ⁇ over a wide range to set the desired use and safety properties of a crampon according to the invention.
  • the angle of inclination is between 0 ° and 90 ° or 0 ° and -90 ° without, however, reaching the two limit values, since if these conditions are present, optimum bending stiffness and power transmission characteristics are only available in one direction of loading, while a crampon with inclined side rails is suitable the present invention overcomes this disadvantage and ensures a high degree of bending stiffness and break resistance in both main load directions.
  • the angle of inclination of the longitudinal beams does not have to be constant along the longitudinal axis of the crampon, rather it can be different in axially successive sections of the crampon.
  • This can be particularly, but not exclusively, of advantage in the case of a crampon which consists of a front and a rear frame with an articulated or at least movable connection, the longitudinal members of the front frame having a different angle of inclination than the longitudinal members of the rear frame .
  • the mechanical properties of the two frame parts can be adapted to the different loads occurring on the forefoot or on the heel when walking. If, above all, the safety against breakage, for example of a Chouinard crampon with perforated side members, is to be improved, then the longitudinally extending frame parts are preferably inclined in the sections provided with bores.
  • the longitudinally extending frame parts are inclined with respect to the essentially horizontal frames plane by bending the frame parts around their longitudinal axis.
  • the sections of the longitudinal members located between two successive cross members are thus, as it were, rotated about their longitudinal axis by the angle of inclination ⁇ .
  • This twisting or twisting can be integrated into the forming processes necessary during production, so that in this case the desired properties can be achieved very inexpensively according to the present invention.
  • a particularly advantageous embodiment of the invention is a crampon in which two longitudinal members are attached to a rear and front crampon part by welding, screws, rivets or the like so rigidly or molded that they along the longitudinal axis by the angle ⁇ are inclined with respect to the horizontal frame plane.
  • the longitudinal members of the front and rear crampon parts axially overlap in pairs and carry at least one toothed bridge in the axial direction between the front and rear crampon parts.
  • the connection of the front and rear crampon part can either be rigid by clamping or screwing the overlapping side members or made by a fendering connecting element.
  • the Zacknach Irish has at its outer sections with respect to the central axis of the crampon transverse to the central axis and perpendicular to the horizontal plane guide elements, which are provided with axial recesses, the shape of which corresponds essentially to the transverse profile of the side members and their main surface axis by the angle ⁇ compared to the substantially horizontal frame surface is inclined.
  • These guide elements consist, for example, but by no means exclusively, in the fact that tabs formed on the serrated bridge are bent out of the plane of the serrated bridge perpendicular to the central axis of the crampon.
  • these guide elements can also be fastened to the tooth bridge by welding, screwing, riveting or the like.
  • the jagged carrier bridge is attached to the longitudinal girder, the longitudinal girders being guided in the recesses of the guide elements, so that a secure positional fixation of the jagged carrier bridge is ensured transversely to the central axis of the crampon in any axial position and at the same time an axial displacement of the jagged carrier bridge is made possible.
  • the crampon can be adapted to a wide variety of stress types and jagged carrier bridges of various shapes and types can also be attached in the manner of a changing system.
  • Axial fixation of the toothed beam bridges is preferably carried out using a clamping screw or the like.
  • the Zackong Irish preferably, but by no means exclusively, has a U-shaped shape, the substantially vertical legs of the U-profile being formed by integrally molded or rigidly secured by screws, rivets, welding or the like.
  • the inclination of the recesses of the guide elements can preferably be achieved by two embodiments.
  • the base surface of the toothed carrier bridge can run essentially horizontally and evenly, the angled guide elements having recesses inclined from the horizontal plane by the angle of inclination ⁇ .
  • the main axis of the recesses can run parallel to the level of the jag carrier bridge directly at the junction guide elements - base surface of the U-profile, the inner section of the base of the U-profile with respect to the central axis of the crampon being essentially in the horizontal frame plane and the the central axis outer portions of the base of the U-profile are inclined relative to the horizontal frame plane by the angle of inclination ⁇ .
  • the outermost Sections of the base of the U-profile can then again run parallel to the horizontal frame plane, so that there is a secure contact surface on the mountain shoe.
  • the frame parts running parallel to one another and extending in the longitudinal direction of the same axial section of the crampon are preferably inclined in a complementary manner to one another.
  • the longitudinal beams running parallel to one another are either inclined outwards or inwards by the angle ⁇ .
  • Fig. 1 shows a crampon according to the present invention in a perspective view.
  • a front crampon part 1 with front teeth 2 and vertical teeth 3 has guide elements 4 in the form of tabs bent downwards on its side facing away from the front teeth 2.
  • the front crampon part is preferably made by stamping and bending.
  • recesses exist into which two longitudinally extending frame parts or longitudinal beams 5 project, which are inclined by the angle ⁇ with respect to the essentially horizontal plane of the frame.
  • the longitudinal beams 5 are fastened in the front crampon part 1 by means of clamping screws 6, which are shown only schematically in FIG. 1 for reasons of clarity.
  • the longitudinal beams 5 have a flat rectangular profile in cross section.
  • a toothed beam bridge 7 is attached axially to this longitudinal beam 5 from the side facing away from the front crampon part 1.
  • This serrated bridge 7 has an essentially U-shaped shape, the vertical legs of the U-profile being formed by molded vertical serrations 8.
  • the jag carrier bridge 7 also has guide elements 9 in the form of angled tabs.
  • the guide elements 9 have recesses 10, the cross-sectional area of which essentially corresponds to the cross-sectional area of the longitudinal beams 5, and the main surface axis of which is inclined by the angle ⁇ with respect to the horizontal frame plane.
  • the longitudinal beams 5 run in these recesses 10, so that the entire toothed beam bridge 7 is fixed transversely to the central axis of the crampon and is displaceably guided along the central axis.
  • the toothed carrier bridge 7 is also axially fixed by means of schematically illustrated clamping screws 11.
  • the two longitudinal beams 5 are inclined complementarily to one another by the angle ⁇ , so that there is a symmetrical arrangement.
  • the base surface 12 of the U-shaped serrated bridge is essentially flat in this exemplary embodiment and extends in the horizontal frame plane. It need not be emphasized that, depending on the length of the Crampon and desired use several rack bridges 7 can be attached to the longitudinal beam 5 of the crampon.
  • a second embodiment of a toothed bridge of a crampon according to the invention is also shown in a perspective view.
  • This second serrated bridge 13 also has an essentially U-shaped shape.
  • An inner section 14 of the base surface 15 of the U-profile lies in the horizontal frame plane.
  • the outer portions 16 of the base surface 15 with respect to the central axis of the crampon are inclined upwards by the angle ⁇ from the horizontal frame plane.
  • Outermost sections 17 adjoin the outer sections 16 on the side facing away from the central axis and in turn run parallel to the frame plane.
  • the vertical legs of the U-profile are formed analogously to the exemplary embodiment according to FIG. 1 by integrally formed vertical teeth 18.
  • Guide elements 19 in the form of bent tabs with recesses 20 are also integrally formed on the toothed carrier bridge 13 analogously to the exemplary embodiment according to FIG. 1.
  • the main axis of the recesses 20 runs parallel to the base surface 15 of the U-profile in section 16 directly above the recesses 20.
  • the horizontal inclination of the recesses 20 is therefore not determined when the recesses are punched, but rather by bending the base surface 15 in the section 16 formed.
  • the shape of the recesses 20 corresponds essentially to an area with the width and twice the height of the longitudinal beams 21 and 22.
  • the serrated bridge 13 can be used in the axial region of the crampon, where the longitudinal beams 21 and 22 of a front and rear crampon part axially overlap.
  • the longitudinal beams 21 and 22 can be axially adjusted and fixed relative to one another.

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  • Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
EP89105056A 1988-03-23 1989-03-21 Steigeisen Withdrawn EP0334299A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3809809 1988-03-23
DE19883809809 DE3809809A1 (de) 1988-03-23 1988-03-23 Steigeisen

Publications (1)

Publication Number Publication Date
EP0334299A1 true EP0334299A1 (de) 1989-09-27

Family

ID=6350497

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89105056A Withdrawn EP0334299A1 (de) 1988-03-23 1989-03-21 Steigeisen

Country Status (2)

Country Link
EP (1) EP0334299A1 (pl)
DE (1) DE3809809A1 (pl)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT1580U1 (de) * 1996-06-26 1997-08-25 Kroesbacher Peter Steigeisen
US6742286B2 (en) 2001-01-23 2004-06-01 Kahtoola, Inc. Flexible traction system for common shoes
US6837512B2 (en) 2001-10-24 2005-01-04 David M. Long Apparatus for improving human mobility on snow surfaces

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3786579A (en) * 1973-01-29 1974-01-22 Seattle Mfg Corp Adjustable crampons
DE2947571A1 (de) * 1979-01-19 1980-07-31 Salewa Gmbh Sportgeraetefab Aufbau eines steigeisens und verfahren zur befestigung des steigeisens
DE3418832A1 (de) * 1984-05-21 1985-11-21 Salewa Sportgeräte GmbH, 8000 München Steigeisen

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT150074B (de) * 1936-03-21 1937-06-25 Alfred Horeschowsky Steigeisen.
FR1024617A (fr) * 1949-09-17 1953-04-03 Crampons pour brodequins, en particulier pour brodequins d'alpinistes
DE2051837A1 (de) * 1970-02-14 1971-08-19 RATTI - PIAZZA, eine Handelsgesellschaft nach ital. Recht, Lecco, Como (Italien) Steigeisen für Bergschuhe
US4480396A (en) * 1979-01-19 1984-11-06 Lowe Greg E Crampon construction and method of attachment

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3786579A (en) * 1973-01-29 1974-01-22 Seattle Mfg Corp Adjustable crampons
DE2947571A1 (de) * 1979-01-19 1980-07-31 Salewa Gmbh Sportgeraetefab Aufbau eines steigeisens und verfahren zur befestigung des steigeisens
DE3418832A1 (de) * 1984-05-21 1985-11-21 Salewa Sportgeräte GmbH, 8000 München Steigeisen

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT1580U1 (de) * 1996-06-26 1997-08-25 Kroesbacher Peter Steigeisen
US6742286B2 (en) 2001-01-23 2004-06-01 Kahtoola, Inc. Flexible traction system for common shoes
US7089688B2 (en) 2001-01-23 2006-08-15 Kahtoola, Inc. Flexible traction system for common shoes
US6837512B2 (en) 2001-10-24 2005-01-04 David M. Long Apparatus for improving human mobility on snow surfaces

Also Published As

Publication number Publication date
DE3809809A1 (de) 1989-10-05
DE3809809C2 (pl) 1992-09-24

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