EP3095492B1 - Front jaw for safety ski binding - Google Patents

Description

The invention relates to a front jaw of a safety ski binding with a housing and with two on the housing about vertical axes pivotable sole holders, which cooperate with elements which are arranged between the sole holders in Skiquerrichtung and acted upon by a running in the Skiquerrichtung helical compression spring.

Such a toe is from the EP 1 892 020 A2 known. The acted upon by the spring elements are pistons which are displaceably guided in a cylinder-like housing which has a cylinder axis parallel to the ski direction. Each sole holder is pivotable about a housing arranged on the vertical vertical axis and formed as a double lever. Arranged on the outside of each piston facing the respective sole holder is a link path interacting with the sole-remote arm of the respective sole holder, which is divided into two sections by an elevation, the sole holder being held in the release position on one of these sections. When the binding is triggered, one of the pistons is inserted into the cylindrical housing while compressing the spring. This known toe has a number of components which rub against each other when triggered, in particular, sliding friction occurs between the spring and the inner sides of the pistons in which the spring is held, between the outer sides of the pistons and the cylindrical housing and between the sole holders and the slide tracks of the piston, so that the release force is affected accordingly, especially at lower spring preload.

The invention has for its object to make a toe of the type mentioned in such a way that in a simple and compact design, the sliding friction Triggering is significantly reduced and a defined release force is achieved even at a low spring preload.

The object is achieved according to the invention in that the acted upon by the helical compression spring elements are tension members, wherein the one tension member on one sole holder and the other tension member on the other sole holder is articulated, wherein the vertical axes of the sole holder, based on the position of the mounted on the ski front jaw, are arranged in front of the articulation points of the tension elements.

Due to the inventive design of the front jaw with tension elements instead of pressure elements a particularly low-friction swinging the sole holder is guaranteed when triggered. By using traction elements, the toe jaw can be made with a small number of friction causing points on components and it can also be achieved in setting with lower spring preload exact release forces.

For a compact construction of the front jaw, it is advantageous according to the invention if each tension element extends from its point of articulation on one sole holder in the direction of the other sole holder and in each case in the transverse direction. The helical compression spring is expediently supported on those end regions of the tension elements which are remote from their respective articulation points.

In a particularly compact embodiment of the front jaw according to the invention, the two tension elements are arranged running inside one another, wherein the helical compression spring is positioned in the mutually extending region of the tension elements.

In a particularly low-friction execution of the front jaw, the vertical axes about which the sole holders are pivotable relative to the housing, designed as a bolt or the like mounted on the housing. In another embodiment where no bolts are required, the sole holders have hinged vertical axes. These joints can according to a preferred embodiment of the invention of interlocking recesses and projections may be formed, which are formed on the sole holders and a housing part.

In order to minimize possible sliding friction between the individual components of the release mechanism accommodated in the toe piece, the individual components involved are designed and arranged in a special way.

In one of the measures according to the invention it is provided that the one, first tension member has two arms extending in the ski direction, which are connected at one end via a vertically extending, acted upon by the helical compression spring arm and are hinged on the other a sole holder. Preferably, a bolt is further arranged on the sole holder, with which the ends of the arms of the one tension element are connected and against which the sole holder is rotatably arranged.

A compact embodiment of the front jaw is supported by the fact that the other, second tension element is designed as a pull rod, which extends with a portion between the arms of the first tension element and is surrounded by the helical compression spring.

In a further preferred embodiment, the second tension member carries at its end a relation to the first tension member non-rotatably held first spring abutment which is adjustable in the longitudinal direction of the second tension element. By these measures, the bias of the helical compression spring can be adjusted in a simple manner.

According to a further embodiment variant of the invention, the second spring abutment for the helical compression spring is arranged on the connecting arm of the first pulling element and passes in a rotationally movable manner by the second pulling element.

In a further preferred embodiment, the second traction element is mounted in a special way on the second sole holder, in order to ensure compression of the helical compression spring in a lateral release by the second sole holder. For this purpose, the second tension member passes through the second sole holder and has a widened end portion which sits in a recess of the second sole holder with play and can be supported at the bottom of the recess in a lateral release of this sole holder. The opening in the sole holder is widened in the direction of the housing interior and to the front in order to allow a slight tilting movement of the tension elements together with the helical compression spring about the pivot point of the first tension element on the first sole holder.

• Fig. 1 eine Außenansicht eines erfindungsgemäßen Vorderbackens einer Sicherheitsskibindung von vorne,
• Fig. 2 eine Ansicht einiger Bestandteile des Vorderbackens bei entferntem Gehäuse,
• Fig. 3 einen Horizontalschnitt des erfindungsgemäßen Vorderbackens,
• Fig. 3a in einer Ansicht gemäß Fig. 3 eine andere Ausführungsvariante,
• Fig. 4 eine Schrägansicht gemäß der Darstellung aus Fig. 3,
• Fig. 5 einen Vertikalschnitt des Vorderbackens und
• Fig. 6 und Fig. 7 Ansichten gemäß Fig. 3 während Seitwärtsauslösungen.

Further features, advantages and details of the invention will now be described with reference to the drawing illustrating embodiments. Show

• Fig. 1 an external view of a front jaw according to the invention a safety ski binding from the front,
• Fig. 2 a view of some components of the toe with the housing removed,
• Fig. 3 a horizontal section of the front jaw according to the invention,
• Fig. 3a in a view according to Fig. 3 another embodiment variant,
• Fig. 4 an oblique view as shown Fig. 3 .
• Fig. 5 a vertical section of the front jaw and
• Fig. 6 and Fig. 7 Views according to Fig. 3 while sideways firing.

The figures show a front jaw 1 of a safety ski binding, whose second binding part, a heel-jaw, is not shown. Also not shown is a ski, wherein the designated in the figures with S _L dashed line mounted at Safety ski binding given Skilängsachse called, denoted by Q double arrow indicates the transverse direction - parallel to the ski upper side - or the Skiquerrichtung. Indications such as "vertical", "sideways" and the like relate to the ski mounted toe and a plane parallel to the ski top.

The toe 1 is provided for receiving the toe-side end of the sole of a ski boot, not shown. In one embodiment of the safety ski binding exclusively as Abfahrtsbindung both the toe 1 and the heel pieces, not shown, are arranged or attached in a conventional manner on the ski. However, an embodiment of the safety ski binding as touring binding is also possible, the toe jaw 1 being arranged on a towing plate likewise not shown, rotatably mounted in the region of the front jaw 1 about a transverse axis, which can be locked on the ski in a detachable manner in its rear region.

The front jaw 1 has a one-piece or multi-part housing 2 with an upper housing part 2a, a lower housing part 2b and a front housing part 2c. The lower housing part 2b has a base plate 3, by means of which the toe 1 can be attached to the ski or on a touring plate in a manner not shown and known per se. The base plate 3 may also be a separate component, which is firmly connected to the housing 2, for example screwed. Inside the housing 2 are housed components of a triggering mechanism described in detail below.

The toe 1 has two sole holders, a first sole holder 4 and a second sole holder 5, which are formed at their rear regions in particular in a conventional manner such that they from the top and the front portion of the sole of a ski boot used in the toe 1 overlap at the edge and rest on the side of the sole.

The sole holders 4, 5 are "one arm" executed and in one embodiment ( Fig. 1 to 3 . Fig. 4 to 7 ) at their front portions 4a, 5a about vertical, for example as a bolt 6a ( Fig. 3 ) executed, arranged on the housing 2 axes 7 to the outside, in the direction of the arrows F ₁ and F ₂ in Fig. 6 and Fig. 7 , swing out. At the in Fig. 3 Furthermore, each sole holder 4, 5 has a support element 4b, 5b which is circular in cross-section concentric with its axis 7, in each case at its region of its front portion 4a, 5a which is concentric with its axis 7, which has a countercurrent surface at one on the lateral edge region of the front part 2c of the housing Support surface 8a, 8b rests. At the in Fig. 3a shown alternative embodiments of the invention, the support surfaces 4b, 5b opposite to the support members 4b, 5b formed, more pronounced depressions, so that the support surfaces together with the support elements 4b, 5b form joints about which the sole holder 4, 5 are swung. In this case, no separate axes 7 are required.

On the first sole holder 4, a first tension element 9, on the second sole holder 5, a second tension member 10 is mounted or articulated. The articulation points of the tension elements 9, 10 on the sole holders 4, 5 are located between the axles 7 and the joints 4a, 5b, 8a, 8b and the sections of the sole holders 4, 5 coming into contact with the ski boot. Both tension elements 9, 10 extend between the sole holders 4, 5 in the housing interior and in the cross-section Q, that a tension element 10 extends within the other, as will be described.

In the embodiment shown, the tension element 9 has two arms 9a and 9b extending parallel to the ski upper side and in the ski direction (FIG. Fig. 5 ) and a connecting arm 9c connecting the arms 9a and 9b at one end thereof (FIG. Fig. 5 ), which runs perpendicular to the ski top. The second ends of the arms 9a and 9b are connected to a bolt 6b, which is held vertically in the sole holder 4, such that the sole holder 4 is rotatable relative to the pin 6b. The connecting arm 9c of the tension element 9 is provided with a through-hole through which the second tension element 10, which is designed as a pull rod in the embodiment shown, protrudes into the interior of the first tension element 9 between the arms 9a and 9b. Inside the first tension element 9, the second tension element 10 is surrounded by a helical compression spring 11, which is supported with its one end via a first spring abutment 12 on the connecting arm 9c. The second end of the Helical compression spring 11 is supported on a second spring abutment 13 which is screwed on the end portion of the second tension member 10 and for adjusting the bias of the helical compression spring 11 in the longitudinal direction of the tension element 10 is adjustable. For this purpose, the second spring abutment 13 is held relative to the first traction element 9, as shown, for example, by means of two extensions 13a, 13b (FIG. Fig. 2 ) on its outer circumference, which in the longitudinal direction of the arms 9a, 9b of the first pulling element 9 formed openings 14a, 14b ( Fig. 5 ) intervene.

The second, designed as a pull rod tension member 10 projects beyond the connecting arm 9c of the first tension member 9, passes through an opening 15 in the second sole holder 5 and has an example widened ball-like end portion 10a, which with a certain play in a on the outside of the sole holder 5 in Substantially counter-shaped recess 16 is seated and supported under the pressure of the spring 11 here. The opening 15 in the sole holder 5 is designed such that a certain mobility of the tension element 10 in a plane parallel to the ski surface forward is possible and therefore widening starting from the recess 16 in the direction of the housing interior accordingly. The end portion 10a is pressed under the action of the helical compression spring 11 against the bottom of the recess 16 so that both sole holders 4, 5 are loaded by the helical compression spring 11. The end portion 10a of the tension member 10 is provided with a slot to adjust and change the bias of the helical compression spring 11 in a known manner by means of a conventional tool, in particular a screwdriver. By rotating the tension element 10, the non-rotatably held spring abutment 13 on the tension member 10 is moved longitudinally and thus causes an adjustment of the mutual distance between the spring abutment 12 and the spring abutment 13. In this case, the position of the spring abutment 13 changes, so that the projecting through the opening 14a in the upper arm 9a of the tension element 9 extension 13a of the spring abutment 13 can serve as a display element for the selected setting of the bias of the helical compression spring 11. For this purpose, a transparent window printed with a scale can be provided in the upper housing part 2a, so that a reading of the set spring preload is possible.

In the following, with the aid of the exemplary embodiment with bolts 6a, safety releases of the front jaw by lateral swiveling of the first or the second sole holder 4, 5 and the accompanying release of a ski boot used will be described. If the first sole holder 4 is laterally loaded by the ski boot with a correspondingly large force, the sole holder 4 is pivoted about its axis 7 formed by the pin 6a. The pin 6b is also moved outwards, whereby the tension element 9 connected to the pin 6b Direction of the arrow F ₁ in Fig. 6 is moved and the helical compression spring 10 is compressed, as in Fig. 6 is shown. After the release of the ski boot, the sole holder 4 returns to its original position. In a lateral release of the front jaw 1 under the action of the second sole holder 5 this pivots about its axis 7 formed by the bolt 6a to the outside. In this case, the end portion 10 a of the tension element 10 is held in the recess 16, so that the tension element 10, compressing the helical compression spring 11 in the direction of the arrow F ₂ in Fig. 7 is moved. After the release of the ski boot, the sole holder 5 returns to its original position.

References list

1

front jaw

2

casing

2a

Housing top

2

Housing bottom

2c

Front housing

3

baseplate

4

sole holder

4a

front section

4b

support element

5

sole holder

5a

front section

5b

support element

6a, 6b

bolt

7

axis

8a, 8b

support surface

9

tension element

9a, 9b

poor

9c

connecting arm

10

tension element

10a

end

11

Helical compression spring

12, 13

Spring abutment

13a, 13b

extension

14a, 14b

opening

15

opening

16

recess

F _1, F ₂

arrow

Q

transverse direction of

S _L

ski longitudinal axis

Claims (14)

1. Front jaws (1) of a safety ski binding with a housing (2) and with two sole holders (4, 5) pivotable around vertical axes (7) on the housing (2), which cooperate with elements arranged between the sole holders (4, 5) in a transverse ski direction and to which a helical pressure spring (11) extending in the transverse ski direction is applied,
   characterised in that
   the elements to which the helical pressure spring (11) is applied are traction elements (9, 10), wherein the one traction element (9) is arranged on one sole holder (4) and the other traction element (10) is hinged on the other sole holder (5), wherein the vertical axes (7) of the sole holder (4, 5) are arranged before the linkage points of the traction elements (9, 10), related to the position of the front jaws (1) mounted on the ski.
2. Front jaws according to claim 1, characterised in that each traction element (9, 10) extends from its linkage point on the sole holder (4, 5) in the direction of the other sole holder (4, 5) in a transverse ski direction.
3. Front jaws according to claim 2, characterised in that the helical pressure spring (11) is supported in those end areas of the traction elements (9, 10) that are distant from their respective linkage points.
4. Front jaws (1) according to one of the claims 1 to 3, characterised in that the two traction elements (9, 10) are arranged to run into each other, wherein the helical pressure spring (11) is positioned in the area where the traction elements (9, 10) run into each other.
5. Front jaws (1) according to one of the claims 1 to 4, characterised in that the vertical axes, around which the sole holders (4, 5) can be pivoted in relation to the housing (2), are designed as bolts (6a) or suchlike mounted on the housing (2).
6. Front jaws (1) according to one of the claims 1 to 4, characterised in that the sole holders (4, 5) have vertical axes designed as joints.
7. Front jaws (1) according to claim 6, characterised in that the joints are formed by recesses and projections that engage each other, which are formed on the sole holders (4, 5) and a housing part (2c).
8. Front jaws (1) according to one of the claims 1 to 7, characterised in that one, namely the first traction element (9), has two arms (9a, 9b) extending in transverse ski direction (Q), which are firstly connected with each other via a vertically extending arm (9c) to which the helical pressure spring (11) is applied, and secondly hinged on one sole holder (4).
9. Front jaws (1) according to claim 8, characterised in that a bolt (6b) is arranged on the sole holder (4), with which the ends of the arms (9a, 9b) of one traction element (9) are connected and in relation to which the sole holder (4) can be rotated.
10. Front jaws (1) according to claim 8 or 9, characterised in that the other, namely second traction element (10) is designed as a traction rod, which extends with one section between the arms (9a, 9b) of the first traction element (9) and is surrounded by the helical pressure spring (11).
11. Front jaws (1) according to one of the claims 1 to 10, characterised in that the second traction element (10) supports a first spring counterbearing (13), held non-rotatable in relation to the first traction element (9) at its end, which can be adjusted in longitudinal direction of the second traction element (10).
12. Front jaws (1) according to claim 11, characterised in that a second spring counterbearing (12) sits on the connection arm (9c) of the first traction element (9), which is penetrated by the second traction element (10) in a pivotable way.
13. Front jaws (1) according to one of the claims 10 to 12, characterised in that the second traction element (10) has a further section penetrating an opening (15) in the second sole holder (5), which is equipped with an end section (10a) sitting in a gap (16) in the second sole holder (5) with some freedom of movement.
14. Front jaws (1) according to claim 13, characterised in that the opening (15) widens in the direction of the housing interior and towards the front.

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