JPH03170178A - Toepiece - Google Patents

Abstract

PURPOSE: To prevent a necessary rotational work from being reduced by the compression of a release spring at the time of a frontward twisted overturn by specifiedly constituting a control plate and angle levers respectively. CONSTITUTION: A toe piece is provided with a casing 2 which is fixed to a ski board 3 and has an axial hole 2b. A release spring 5 is stored in the hole 2b, its one end is supported to a lateral wall 2c of the casing, and the other end is supported by a piston-type spring receiver 6. The spring receiver is connected to a tension rod 8, the tension rod penetrates the lateral wall and supports a control plate 9 in its rear end. The tension rod is rotated perpendicularly to the longitudinal axis of the hole 2b of the casing. The tension rod 9 is guided to a vertical long hole 2d formed in the lateral wall 2c, two webs 9c1 , 9c2 having different width are arranged in the front face of the control plate 9, and a short lever arm 11a out of two angle levers 11 which are pivotally mounted by a vertical shaft 10 in the casing 2 is selectively in contact with either one of the both webs.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention is a toe piece, which is provided with a casing that can be fixed to a ski and has an axial hole, and a release spring is accommodated in the hole. the release spring is supported at one end in a transverse wall of the casing and at the other end in a piston-like spring receiver, the spring receiver being coupled to a tension bar; a tension bar passing through the lateral wall and supporting a control plate at a rear end, wherein the tension bar is oriented relative to the longitudinal axis of the hole in the casing; It relates to a type that can be pivoted in a vertical direction.

PRIOR ART A toepiece of this type has already been described in DE 24 48 769 A1. In this known toepiece, the front end of the boot is held securely by a retaining shell. This retaining shell is supported at three points on the casing under the influence of release springs, thus allowing release of the toe piece to the side in the event of a torsional fall, and upward release of the toe piece in the event of a backward fall of the skier. However,
The sole of the ski boot must match the specifications exactly and fit snugly into the retaining shell. If the sole is too small, the boot becomes unstable within the retaining shell during skiing, which is undesirable. If, on the other hand, the sole is too large, the retaining shell contacts the sole only along two lines, which inevitably leads to damage to the sole.

In the toepiece described in DE 29 05 837 A1, when the skier's weight shifts forward, the release spring is preloaded via the pedal, the actuating rod and the control transmission. Therefore, if a torsional fall combined with a forward fall occurs during sliding, the work to be performed by the shell-shaped sole holder before it starts its pivoting movement is reduced. However, this known toepiece is complex in construction due to the large number of individual parts.

A similar towpiece with the same disadvantages is disclosed in DE 29 48 274 A1. Also in this known toe piece with a shell-shaped sole retainer, the release spring is firstly significantly tightened during a torsional fall combined with a forward fall, which reduces the effort required for lateral pivoting of the sole retainer.

The f-toe piece disclosed in DE 2030749 differs from the previously described configurations in that the toe piece body can be pivoted about an axis extending perpendicular to the upper surface of the ski. ing.

An adjustable release spring acting on the locking ball is accommodated in the bore parallel to the pivot axis. The locking pawl is located in a wedge-shaped narrowing recess extending in the longitudinal direction of the ski in the slidably supported guide plate. A rack is fixed to the guide plate,
The rack is engaged with tooth segments. This tooth segment has a lever arm that can be pressed down by the boot during a forward fall of the skier.

In the event of a torsional fall combined with a forward fall, the guide plate is first slid towards the end of the ski, so that the locking pole is supported in a reduced area. As a result, the force required for release is reduced, and the shell-like sole presser fixed to the toe piece body can be turned with less force than when the toe piece is simply twisted and fallen. This known toe piece also uses a large number of structural parts, and these large numbers of structural parts make the toe piece difficult to manufacture.

[Problems to be Solved by the Invention] It is an object of the present invention to eliminate the disadvantages of the known configurations, and, unlike the last three embodiments mentioned above, to reduce the turning effort required in the event of a forward torsion fall due to the compression of the release spring. The purpose is to provide a tow piece that would never be created. In this case, it is rather desirable that the preload of the release spring be constant, regardless of whether a pure torsional fall or a torsional fall combined with a forward fall takes place.

[Means for Solving the Problem] In order to solve this problem, the present invention provides a toe piece of the type mentioned at the beginning, in which the tension rod is guided in a vertical long tag provided in the transverse wall. and the control plate has on its front surface two overlapping webs of different widths, one of the webs having a short shaft of two angle levers supported on vertical axes in the casing. The lever arm on the paddle side is now in selective contact.

[Effect of the invention] According to the invention, the control plate has two overlapping webs of different widths on its front surface, so that whether only torsional overturning occurs or combined with torsional overturning Depending on whether a forward fall occurs, two different characteristics of the toepiece release result. However, such a vertical shift of the control plate can be implemented much more easily than a shift in the longitudinal direction of the ski, which would require a control transmission with many individual parts.

With the structure of claim 2, it is possible to produce different release characteristics for the release process during a pure twisting fall and the release process during a twisting fall combined with a forward fall. .

Various options are available for the configuration of the individual control surfaces of both control surface pairs. Among these measures, the measure according to claim 3 has the advantage of simple manufacture. moreover,
With this measure, an angled lever with a straight vertical control edge can be used.

The measures according to claim 4 ensure a good transition from the upper pair of control surfaces to the lower pair of control surfaces of the control plate.

The measures according to claim 5 ensure that the short lever arm of the pivoting angle lever is in contact with the associated control surface. Furthermore, jamming in the lower region of this lever arm is prevented.

The measures according to claim 6 allow an advantageous transmission of the forces produced by the skier that are necessary for adjusting the displacement of the control plate.

The measures according to claim 7 enable a play-free bearing of the free end of the pedal in the recess of the control plate, without bending of the pedal occurring.

The measures according to claim 8 ensure a reliable return of the control plate to its starting position after a forward fall has taken place. Furthermore, it is ensured that neither abutment of the control plate against the plate-like extension of the casing nor of the tension rods against the transverse walls of the casing can occur.

The measures according to claim 9 ensure a reliable support of the tension bar as well as continuous support of the tension bar in the vertical plane during displacement adjustment.

[Example] In the following, embodiments of the invention will be explained in detail with reference to the drawings.

In the drawing, the toe piece is designated as a whole with the reference numeral 1. The toe piece has a casing 2 which is fastened to the ski 3 by means of screws 4. The casing 2 has a plate-shaped extension 2a towards the boot 16, which extends below the sole. A hole 2b is provided in the casing 2, into which a release spring 5 configured as a coil spring is inserted.
is stored. This release spring is supported at one end in the transverse wall 2c of the casing 2 and at the other end in a piston-shaped spring receiver 6, which is released by means of a threaded sleeve 7. The axial movement of the spring 5 can be adjusted. This spring receiver is guided into the hole 2b. The threaded sleeve 7 rests with a surface 7 a configured as a spherical area on a correspondingly configured counter surface 6 a of the spring receiver 6 . The threaded sleeve 7 is screwed onto a tension rod 8, which passes through the middle of the release spring 5 and extends through a vertical elongated hole 2d provided in the transverse wall 2c of the casing 2. It projects through and carries a control plate 9 at its rear end.

On the side of the casing 2 facing the ski boot l6, two vertical shafts 10 are fixed symmetrically with respect to the vertical longitudinal center plane of the gear l, to which angle levers II are fixed. It is supported (see Figure 2). These angle levers 11 are the shorter lever arms IIa.
The lever arm itb is in contact with the front side of the control plate 9, and the longer lever arm itb is in contact with the ski boot l6. The shorter lever arm lla is beveled at an acute angle α in the lower region of its side facing the control plate 9.

A pedal 12 with a sliding plate 15 is pivoted by an axle 13 in the free end region of the plate-like extension 2 a of the housing 2 . The free end of the pedal 12 projects into a cutout 9a provided in the control plate 9. This recess 9a slidably accommodates the free end of the pedal 12 and widens in a wedge-like manner towards the axis 13 of the pedal 12. Below the pedal 12 there is provided a spring 4, for example in the form of a rubber block, which serves to press the pedal 12 upwards, so that the tension rod 8 is pushed against the lateral wall 2c.
It abuts on the upper end of the elongated hole 2d.

The control plate 9 is constructed in the form of a rectangular parallelepiped. The front face of the short lever arm 9 of the control plate 9 has, in its lower region, two control surfaces 9 which are bounded by a pair with respect to the vertical longitudinal center plane of the toe piece 1.
b, and these control surfaces are separated from each other by webs 9c1. The two upper control surfaces 9e have an upper section 9el formed by a cylindrical surface and an adjoining lower section 9e2, which is formed by a toroidal surface. In this case, the radius of the cylindrical surface of the upper section 9e1 is designed to be larger than the radius of the lower control surface 9b. The two upper control surfaces 9e are separated from each other by a web 9c2, which is narrower than the lower web 9cl. In this case, the transition between the upper web 9c2 and the lower web 9c1 is formed by both toroidal surfaces of the lower section 9e2 of the upper control surface 9e (see FIG. 5).

In the sliding position, all parts assume the positions shown in FIGS. 1 and 2. In this case, the shorter lever arm lla of the angle lever 11 has a wider lower vertical web 9c1.
If a pure torsional fall occurs during the skiing of a skier in contact with The control plate 9 is pulled rearward against the force of the release spring 5 until it slides.

However, if a forward torsional fall of the skier occurs, the pedals 12 are first swung in the direction of the upper surface 3a of the ski 3 against the force of the spring 14, in which case the control plate 9 is pulled downwards. In this case, the pivoting movement of the pedal 12 is limited by the predetermined dimensioning of the spring l4, so that the tension rod 8 can come into contact with the lower end of the slot 2d provided in the transverse wall 2C of the casing 2. In addition, the control plate 9 is connected to the plate-like extension 2 of the caning 2.
cannot touch a. The generation of undesired frictional forces during the release operation is thus reliably avoided. During this release movement, the two shorter lever arms lla of the two angle levers 11 come into contact with the upper narrow web 9c2. As a result, the shorter lever arm lla of the angle lever 11 that pivots is pure! The tensile rod 8 is pulled backwards by a significantly shorter distance than when the user twists and falls (see Figure 4). Therefore, the release distance required for releasing the toe piece 1 is approximately 40% smaller during a forward twisting fall than during a pure twisting fall. This compensates for the increased ball friction that occurs during forward twist falls.

The invention is in no way limited to the illustrated embodiments. On the contrary, various variations are possible without going beyond the scope of the invention. For example, a piston-shaped spring retainer for a release spring is screwed directly onto the tension rod and has a cambered outer circumferential surface in which the spring retainer fits into a hole provided in the casing. The outer circumferential surface allows the tension bar to pivot in a vertical plane. Furthermore, a further spring, for example a coil spring or disc spring unit, may be arranged below the pedal.

4 In a further variant, the control plate is provided with two control surfaces with a sinusoidal cross section or with two planar inclined surfaces at the connection to both webs. In all cases it is advantageous to round the transition between the web and the control surface.

[Brief explanation of the drawing]

The drawings show an embodiment of the toe piece according to the present invention, in which FIG. 1 is a longitudinal sectional view of the toe piece located in the sliding position, and FIG. 2 is a partial sectional view taken along the line II-■ in FIG. 1. FIG. 3 is a longitudinal cross-sectional view of the toe piece when the vehicle falls forward; FIG. The figure is a perspective view of the control plate. l...Top piece, 2...Casing, 2a...
Extension part, 2b... hole, 2c... lateral wall, 2d...
・Long hole 3... Ski, 4... Screw, 5... Release spring 6... Spring receiver, 6a... Compatible surface, 7...
・Threaded sleeve, 7a... surface, 8... tensile rod,
9... Control plate, 9a... Notch, 9b...
Control surface, 9c19c2... web, 9d... stepped portion,
9e... Control surface 9e1... Upper section, 9e2... Lower section, IO... Shaft 11... Angle lever 11a
．． llb...Lever arm, 12...Pedal, 13
... shaft, 14 ... spring, 15 ... sliding plate,
16... Ski shoe procedure amendment, -j5, December 2002, Mumu Japan License Agency Commissioner l. Case Description 1990 Patent Application No. 232258 2. Name of the invention Torpiece 3. Relationship with the case of the person making the amendment Name of patent applicant TMC Corporation 4. Agent address: 553 Shin-Tokyo Building, 3-3-1 Marunouchi, Chiyoda-ku, Tokyo, Japan Telephone: (216) 5031-5-6. Subject of amendment (1) Representative column of patent applicant in application form

Claims (1)

[Claims] 1. The toe piece is provided with a casing that can be fixed to the ski and has an axial hole, and a release spring is housed in the hole, and the release spring is attached to one side of the toe piece. supported at one end on the lateral wall of said casing and at the other end on a piston-like spring receiver, said spring receiver being connected to a tension bar, said tension bar being supported on said casing; passing through the transverse wall and supporting a control plate at the rear end, in which case the tension rod is pivotable in a direction perpendicular to the longitudinal axis of the hole of the casing; in which the tension rod (8) is guided in a vertical elongated hole (2d) provided in the transverse wall (2c), and the control plate (9) is provided with different widths in front thereof. Two webs placed overlapping each other (9c_1
, 9c_2), and the shorter lever arm (11a) of the two angle levers (11) supported on a vertical shaft (10) in the casing (2) is mounted on one of both webs. A toe piece characterized by selective contact. 2. Following each web (9c_1; 9c_2), two control surfaces (9b, 9e) are provided which are configured symmetrically with respect to the vertical longitudinal center plane of said control plate (9), in this case , the course of the control surface (9e) provided following the upper web (9c2) is similar to that of the lower web (9c2).
2. The towpiece according to claim 1, wherein the profile of the control surface (9b) subsequent to c_1) differs from that of the control surface (9b). 3. The lower control surface (9b) is configured in a cylindrical shape,
The upper control surface (9e) is also of cylindrical design in its upper section (9e_1) and in its lower section (9e_1).
2) is configured as a torus surface, in which case the radius of the cylindrical upper section (9e_1) of the upper control surface is formed larger than the radius of the lower cylindrical control surface (9b). 3. The toe piece according to claim 2. 4. Upper web (9c_2) and lower web (9c_2)
1) is formed by two steps (9d), which are the lines of intersection of the upper control surfaces (9e) with the respective torus surfaces of the lower section (9e_2). , a toe piece according to any one of claims 1 to 3. 5. The shorter lever arm (11a) of both angle levers (11) has an approximately rectangular cross-section, in which case each angle lever (11a) faces towards said control plate (9). 2. The toe piece according to claim 1, wherein the side surfaces are bevelled at an acute angle (α) in the lower region. 6. said control plate (9) has a cutout (9a) in which a pedal (12) is slidably supported at its free end; At the end of the ski, an axis (
2. The toe piece according to claim 1, wherein the toe piece is pivotally connected to the plate-shaped extension (2a) of the casing (2) by means of a screw (13). 7. The notch (
Toepiece according to claim 6, characterized in that 9a) widens in a wedge-like manner towards the axis (13) of the pedal (12). 8. A spring (14) is housed between the pedal (12) and the plate-shaped extension (2a) of the casing (2), which spring causes the pivoting movement of the control plate (9) and thus the 7. Torp piece according to claim 6, which limits the pivoting movement of the tension rod (8). 9. The tensile rod (8) is connected to the spring receiver (6) via a threaded sleeve (7), the threaded sleeve (7) having a surface (7a) configured as a spherical area. )
2. The toepiece according to claim 1, wherein said surface is in contact with a correspondingly configured counter surface (6a) of said spring receiver (6).