EP0565913B1 - Shoe for mountain climbers - Google Patents

Abstract

The shoe for mountain climbers has a shaft and upper part made of a first material (2) as well as an exchangeable sole with edge part made of a second material (7); the materials are selected in such a manner that, as a result of the high coefficient of friction between them, slipping of the sole is excluded even in the case of extreme loading. <IMAGE>

Description

The present invention relates to a climbing shoe for mountaineers with a shaft which consists of a first soft, elastic upper part which lies closely against the foot and an elastic lower part which is firmly connected to the upper part and substantially corresponds to the tread, and with an interchangeable sole attached to the lower part second elastic material, which has an elastic edge part made of the same second material, which encloses a large part of the upper part and is connected to it in a press fit.

All climbing shoes currently available on the market consist of an elastic upper part that adapts to the shape of the foot and a lower part that is generally glued and has a lower elasticity that is firmly bonded to this upper part and extends over the entire tread, which is mostly made of natural rubber. However, this rubber sole is subject to severe abrasion when climbing rock faces, so that in some cases such climbing shoes are used up after climbing a rock face for the first time, i.e. must be replaced by new climbing shoes. The climbing shoes, however, have a purchase price in the order of several hundred marks; mountain athletes also find it annoying to have to take several pairs of climbing shoes to wear used shoes, i.e. to be able to replace those with punctured or worn parts at any time.

From DE-OS 38 24 169 a sports shoe, consisting of a shoe body and an outsole, is known, in which the outsole as a whole is replaceable and from below in the Shoe body can be inserted. With this sports shoe, it should be possible to do justice to the natural soil conditions, ie lawn, plastic surface, hard court, soft terrain or the adhesion of the soil, quickly and quickly, by providing the lower part of the shoe with a supporting body, to which alternative outsoles can be attached, which can be provided with knobs, for example, and which can be firmly connected to the shoe body by means of wire, plastic, cord straps, etc. For this purpose, both the support body and the outsoles are provided with recesses through which a tether is threaded. So it is possible. Before athletic use, such as a running competition or a tennis match, adjust the sports shoe according to the previously known local conditions, but not in the middle of a sporting event with a few simple steps to replace a used sole with a new sole.

DE-GM 83 27 686 describes an overshoe sole made of elastic material, such as plastic or rubber, which is pulled with tension over the sole of the shoe to be protected and which consists of the actual sole and aids for fastening the same, the sole being a circumferential one Has edge approximately at the level of the sole of the shoe, which is provided in the area of the instep with a reinforcement, which can also be designed as a grip tab. In the area of the web, the sole is elastically extensible in the longitudinal direction, while the surface facing the shoe sole can be provided with depressions or is waffle-shaped.

European patent application 298 721 describes a shoe which is composed of two parts, the inner part being in the form of a slipper, which can be surrounded by the second part in the form of an overshoe sole, which is accordingly adapted to the shape of the slipper and is provided with suitable holding devices, for example push buttons, so that the assembly of the two parts Shoes are particularly suitable for activities outside the home, while the inner slipper is only intended for indoor activities.

The DE-GM 18 56 901 relates to an overshoe, which is intended in particular for slabs and parquet flooring and which consists of a rubber or plastic sheath to be pulled over the front part of the actual shoe and which has approximately the same shape and which has at least one fastening strap is provided to detachably attach the case to the foot. The tip of the cover can be reinforced, as can the sides of the cover; this prevents premature wear of the normal work shoes, which occurs particularly when the front part of the normal work shoe is subjected to excessive stress when working on the floor.

The present invention has for its object to provide a climbing shoe for mountaineering, with which not only the outsole can be adapted to the climbing conditions (smooth, hard, rough or soft rock), but also in a few easy steps with a similar new sole can be replaced if the old sole has been climbed through, so that it no longer guarantees sufficient hold in the rock; At the same time, the costs for climbing equipment are to be reduced and the safety of the climber, in particular on steep walls, is to be increased.

Starting from a shoe according to DE-A-3 824 169, this allowance is solved by the features of the characterizing part of claim 1. Advantageous configurations are described in the subclaims.

The climbing shoe according to the invention has the advantage, on the one hand, that the entire shoe no longer has to be replaced if the outsole is worn out, but only the actual wearing part, namely that with the rock, i.e. with the partly sharp-edged stone in contact with the sole, which is connected to the upper part of the upper in a clamped fit. It is not only possible to remove a used sole with a few quick steps and replace it with a new sole, but also to replace a sole for a specific climbing section with a differently profiled sole for another climbing section, namely during the ascent or Descent to achieve optimal security. At the same time, the cost of the equipment can be significantly reduced because the replaceable rubber soles cost only a fraction of what a complete climbing shoe requires. Due to the special choice of material for the sole and the edge part and the special surface quality of the upper, in particular its upper part, a particularly high friction is achieved between the two materials, so that the sole can not slip with respect to the upper even if the climber is on a rocky outcrop Seek support that is significantly smaller than the tread of the sole; Even with an external load in the vicinity of the connecting edge between the sole and the edge part, the sole does not shift with respect to the lower part of the shaft.

• Fig. 1 das Oberteil und das Unterteil eines Kletterschuhs;
• Fig. 2 ein erstes Ausführungsbeispiel einer zusätzlichen auswechselbaren Sohle;
• Fig. 3 den vollständigen Kletterschuh mit aufgeschnittenem Zehenbereich;
• Fig. 4 ein zweites Ausführungsbeispiel eines Oberteils für einen Kletterschuh;
• Fig. 5 ein zweites Ausführungsbeispiel einer zusätzlichen auswechselbaren Sohle;
• Fig. 6 ein drittes Ausführungsbeispiel einer zusätzlichen auswechselbaren Sohle;
• Fig. 7 den daraus entstandenen Kletterschuh und
• Fig. 8 bis 10 drei Ausführungsbeispiele dreier zusätzlicher Haltevorrichtungen zur verbesserten Verbindung der zusätzlichen auswechselbaren Sohle mit dem Oberteil des Kletterschuhs.

The invention is explained in more detail below with reference to the drawing, in which advantageous exemplary embodiments are shown. Show it:

• Figure 1 shows the top and bottom of a climbing shoe.
• Figure 2 shows a first embodiment of an additional interchangeable sole.
• 3 shows the complete climbing shoe with the toe area cut open;
• Fig. 4 shows a second embodiment of an upper part for a climbing shoe;
• 5 shows a second embodiment of an additional replaceable sole;
• 6 shows a third embodiment of an additional interchangeable sole;
• Fig. 7 the resulting climbing shoe and
• Fig. 8 to 10 three embodiments of three additional holding devices for improved connection of the additional interchangeable sole with the upper part of the climbing shoe.

In the figures, the same parts are provided with the same reference symbols; in Fig. 1, 2 denotes a soft, elastic, tight-fitting upper part, e.g. Made of cotton, leather or a suitable plastic and clings closely to the shape of the foot. With 3 is also an elastic, essentially corresponding to the tread lower part, which is firmly connected to the upper part and in particular is glued or sewn to it and consists of the same elastic material. The entry opening of the upper part 2 is designated by 4 and a soft tab below the lacing 5 is designated by 1.

3 now shows a replaceable sole 8 made of a likewise elastic material, advantageously rubber, which is provided with an elastic edge part 7 made of the same material, which is firmly connected to the elastic sole 8 and extends at an angle from the sole in such a way that the edge part 7 when assembled with the shaft shown in FIG. 1, a large part of the upper part 2 encloses and is connected to it with appropriate dimensions in the clamp. In the embodiment shown in Fig. 2, the replaceable sole 8 covers only the front portion of the lower part 3, ie the portion of the greatest load when climbing. 9 therefore denotes a cutout in the additional replaceable sole; Now you touch the additional interchangeable sole 8 with its edge part 7 over the shaft shown in Fig. 1, so that the interchangeable sole 8 bears firmly on the lower part 3 and the edge part 7 firmly encloses a large part of the upper part 2 and rests against it in a press fit , wherein the upper edge 6 of the edge part 7 protrudes almost to the entry opening 4, so you get the climbing shoe shown in Fig. 3, in which the toe section is cut open. It is clear that the interchangeable sole 8 can be slipped on or stripped off in the shortest possible time with only one hand, and consequently even during the ascent or descent in the wall.

• Reißfestigkeit (= Quotient aus der im Augenblick des Reißens gemessenen Kraft und dem Anfangsquerschnitt der Probe): 11,5 N/mm²,
• Reißdehnung (= Quotient aus der im Augenblick des Reißens gemessenen Änderung der Meßlänge und der ursprünglichen Meßlänge der Probe): 830 %,
• Härte 58° Shore A
• Elastizität (= Quotient aus der Rückprallhöhe eines Pendels und dessen Fallhöhe): 9 %,
• Weiterreißwiderstand (= Quotient aus der Kraft, die eine definiert eingeschnittene Probe dem Weiterreißen entgegensetzt, wobei die Kraft senkrecht zur Schnittrichtung aufgebracht wird): 21 N/mm,
• Dichte: 1,15 g/cm³.

It is essential that the material of the sole and also of the edge part have certain mechanical properties, since these significantly improve the safety of the climber. For this purpose, a material is selected, advantageously a natural or synthetic rubber, with a hardness of 50-80 Shore A, in particular a hardness of 58-62 Shore A and an elongation at break of 400-1000%, in particular 830%. The upper consists of a material that has a high coefficient of friction with regard to the material of the sole including the edge part, such as suede with a roughened surface or plastic with a rough surface, so that a relative displacement between the shaft and the sole or edge part is excluded, provided that the climbing shoe is in use. A butyl rubber with the following properties has proven to be particularly suitable as the material for the sole and the associated edge part:

• Tensile strength (= quotient of the force measured at the moment of tearing and the initial cross section of the sample): 11.5 N / mm ² ,
• Elongation at break (= quotient of the change in measuring length measured at the moment of tearing and the original measuring length of the sample): 830%,
• Hardness 58 ° Shore A
• Elasticity (= quotient of the rebound height of a pendulum and its drop height): 9%,
• Tear resistance (= quotient of the force that a defined incised sample opposes tearing, the force being applied perpendicular to the cutting direction): 21 N / mm,
• Density: 1.15 g / cm ³ .

When using such a butyl rubber for the sole and the edge part together with a suede with a roughened outer surface for the shaft, during use, i.e. in the clamped position of the interchangeable sole on the shaft, no slipping between these two parts to one another was found even if the climber stood with the outer edge of the sole on a small rocky ledge at an angle to the horizontal, so that the climbing shoe according to the invention ensured optimal climbing safety in steep walls.

In order to achieve an even firmer connection between the upper part 2 and the exchangeable sole 8, the seat of the already tensioned raised and form-fitting edge part 7 can be improved in the exemplary embodiment shown in FIGS. 4 and 5 by a groove in the upper part 2 10 is provided, in which a correspondingly adapted bead 11 on the inside of the edge part 7 engages after the covering of this edge part on the upper part 2. It is just as well possible that instead of the groove 10 in the upper part 2, a bead is provided, over which a correspondingly elastic edge region is then drawn at the location of the bead 11 in the edge part 7 in a press fit.

In the embodiment shown in FIGS. 6 and 7, the upper consisting of upper part 2 and lower part 3 is provided with a replaceable sole 8 with a rib profile, which is also held again by means of an overstriped edge part 7 seated in the press fit on upper part 2. The sole 8 in this embodiment, like the one according to Figs. 4 and 5, completely covers the lower part 3, i.e. also the heel area. The lower part of the shaft can also be provided with projections which engage in adapted recesses in the sole.

8 to 10 show additional holding devices for the tight connection of the edge part 7 for the interchangeable sole 8 with the upper part 2; 8 this is done by an eyelet which is firmly connected to a rubber ring and through which the shoe strap 5 can be threaded; in Fig. 9 the additional holding device consists of a clamp closure 13 and in Fig. 10 from an elastic band, e.g. a rubber band.

With a suitable dimension of the additional interchangeable sole 8 with the associated edge part, a tight press fit is obtained on the upper part 2, the toes being pressed against the front section of the upper part 2 by the strong pressure on the heel area, as a result of which the climber obtains a better grip in the rock .

Claims (10)

1. A climbing shoe for mountaineering, comprising a shaft made of a first elastic material and consisting of a top (2) and a bottom (3), the top (2) being soft and elastic and fitting snugly against the foot and the bottom (3) being elastic and fastened to the top (2) and essentially matching the footprint, and comprising a replaceable, interchangeable sole (8) made of a different, second elastic material that rests against the bottom and associated margin (7) made of the second elastic material that is forced tightly around most of the shoe's top (2), wherein the second material is a natural or synthetic rubber with a Shore A hardness of 50 to 80 and a stretch to tear of 400 to 1000% and wherein the first material is a plastics with rough surface or a deerskin with its outer surface roughened, to get a high coefficient of friction relative to the second material.
2. The shoe defined in claim 1, wherein the second material is butyl rubber with a Shore A hardness of substantially 58 and a stretch to tear of substantially 830% and the shaft is of deerskin with its outer surface roughened.
3. The shoe defined in claim 1, wherein the upper edge of the margin (7) extends up to the immediate vicinity of a foot-insertion opening in the shaft (2).
4. The shoe defined in claim 1 or claim 2, further comprising a ridge along the upper border of the surface of the margin (7) facing the top that fits into a matching groove in the outer surface of the top.
5. The shoe defined in claim 1 or claim 2, wherein the upper edge of the margin has a section of a third material that is more elastic than the margin (7) itself and stretches over a ridge along the outer surface of the top when the margin is tightly in position.
6. The shoe defined in one of the previous claims, wherein the sole (8) covers only the front of the bottom (3).
7. The shoe defined in one of the previous claims, wherein the bottom walking surface of the sole (8) is smooth.
8. The shoe defined in one of the previous claims, wherein the bottom, walking surface of the sole (8) is rippled.
9. The shoe defined in one of the previous claims, wherein the bottom surface of the sole (8) has depressions that accommodate elevations on the facing surface of the shaft.
10. The shoe defined in one of the previous claims, further comprising supplementary fasteners on the margin (7) that engage the top (2).

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