JP2569030B2 - Anti-theft wheel fixing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is an anti-theft wheel fixing device comprising a sleeve surrounding a hexagonal head of a wheel nut or bolt, the sleeve being rotatable on the hexagonal head and cooperating with a lock cylinder. The keyed cylinder plug of this lock cylinder controls the locking member associated with the radial shoulder for the locking member to engage, and the engaging portion of the locking member with respect to the radial shoulder is controlled by the key. The present invention relates to a device released by rotation of a cylinder plug.

Such an arrangement is known from U.S. Pat. No. 2,534,446, in which a hexagonal head directly receives a cylinder plug and has diametrically opposed longitudinal tumbler slots. The free end of the hexagonal head forms a cylindrical step and has a circumferentially extending slot for mounting a locking member, which is fixed by a pin. This means that the lock cylinder itself is a component of the wheel nut or bolt. Hexagonal heads have disadvantages because of the multiple slots. Furthermore, when the hexagonal head is tightened or loosened, the lock cylinder may be damaged. After applying the wheel nuts or bolts, the sleeve must be pushed into the hexagonal head. Since the key must be operated to rotate the cylinder plug in order to fix it in the mounting position, the locking member can reach the annular groove of the sleeve. Form a shoulder in the direction. If the sleeve is not fully depressed, the locking member pivots into the area in front of the annular groove. Then, the sleeve is fixed so as not to be removed.

The purpose of configuring such a device, which facilitates the mounting and fixing of the sleeve, in addition to the fact that the lock cylinder is not roughly handled, that it is simple to manufacture, is based on the subject matter of the present invention. .

The object of the present invention is to provide a latch member in which the locking member, which is spring-loaded outward from the cylinder plug when the sleeve is pressed into the hexagonal head, is snapped behind the radial shoulder. This is solved by the above-described device.

As a result of this configuration, the device has increased value in use. Lock cylinders are no longer components of wheel nuts or bolts. Thus, the lock cylinder is not exposed to damage when tightening or loosening.
The hexagonal head is not weakened by the opening therethrough. Furthermore, the mounting of the sleeve containing the lock cylinder can be performed without manipulating the key and only by pushing it into the hexagonal head. During this mounting movement, the lock cylinder flexes. As soon as the locking member is located in the area behind the radial shoulder of the hexagonal head, it is snap-fitted. The snap fit is clearly audible, ensuring a secure mounting position. This simple installation of the device saves time. The sleeve can be removed only after the key has been operated and the locking member has been guided to the release position by the cylinder plug. Since several sleeves with lock cylinders can be removed with a single key, it is necessary to provide one extra key and one extra key for one set of sleeves.

Advantageously, the locking member is in the form of a double-arm latch extending in the length of the lock cylinder, having a latch head arranged at one end, and further comprising another latch arm. Is surrounded by an annular spring extending circumferentially around the cylinder plug. Since the locking member is now located in the region of the tumbler, the device can be of a short and lightweight construction. Therefore, the length is determined only by the length of the lock, and the number of tumblers can be increased to increase the security of the lock. Also, seals may be provided on all operating parts.

In this connection, there is the advantage that the annular spring is located in the outer open recess of the locking member. Thus, the device does not protrude beyond the locking member in the background direction, violating a space-saving configuration.

An advantage from a control technology point of view arises in that the inwardly inclined surface of the hexagonal head is located outside the radial shoulder. When the sleeve is depressed, the flexing movement of the latch gradually progresses.

A larger support surface is obtained because the latch head is circumferentially wide relative to the latch member shaft. Thus, a greater removal force engaging it can be accepted without danger.

Another variant feature is that the locking member is in the form of an annular leaf spring extending circumferentially around the syringe plug, the diameter of which can be reduced by rotation of the cylinder plug, the diameter of which can be reduced. In the larger, non-tension state, it projects outwardly for a portion of its length to cooperate with the radial shoulder. Thereby, the labor of the component parts can be saved. Now, the annular leaf spring itself becomes the locking member. During the mounting movement of the sleeve, the inwardly inclined surface of the hexagonal head reduces the diameter of the annular leaf spring. Then, as it moves in front of the radial shoulder, it can loosen and secure the sleeve against withdrawal. Then, in order to pull out the sleeve, it is necessary to insert a key suitable for the lock cylinder.

Finally, the present invention further provides a receiver wherein the inwardly bent end of the annular leaf spring is spaced from the other end of the annular leaf spring fixed to the plug by approximately a quarter of a circle. It has the advantage of engaging the surface. Thus, the use of space is optimal. The receiving surface is preferably formed by a projection on the side of the housing for the lock cylinder.

Two exemplary embodiments of the invention will now be described, by way of non-limiting example, with reference to the accompanying drawings, in which:

In the accompanying drawings, FIG. 1 shows a general view of the present invention according to the first embodiment shown together with related keys, FIG. 2 shows a front view of FIG. 1, and FIG. 3 shows a sleeve separated from a wheel nut. FIG. 4, FIG. 4 is an enlarged view in the longitudinal direction of FIG. 3, FIG. 5 is a sectional view taken along the line V--V in FIG. 1, and FIG.
FIG. 7 is a sectional view taken along line VI-VI of FIG. 7, and FIG. 7 is a line VII-V of FIG.
II is a sectional view, FIG. 8 is a partial sectional view of the device according to the second embodiment showing a sleeve fitted with a wheel nut,
FIG. 9 is a cross-sectional view of the device of FIG. 8 in the region of a locking member in the form of an annular leaf spring.

In the first embodiment shown in FIGS. 1 to 7, the wheel nut is designated by the reference numeral 1. This nut has a head 2 of circular cross section together with a plug part 3 and, adjacent thereto, a head 4 of polygonal (in this case hexagonal). An axial bore 5 extends from the free end of the polygonal head 4 (FIG. 4). The bore 5 forms a radial shoulder 6 in the region of the end face opposite the head 2,
The inwardly inclined surface 7 extends on the side opposite to.

The hexagonal head 4 adjacent to the plug part 3 is provided with rounded corners 9. A sleeve 10 covers the hexagonal head 4, said hexagonal head with corners 9 allowing for rotational mounting with respect to the sleeve 10, said sleeve 10 being dimensioned to receive the hexagonal head 4. It has a bore 14. When the sleeve is depressed, the end 11 of the sleeve 10 on the depressed side extends to the head 2. Adjacent end 11 in bore 14 is an inner annular groove 12. A sealing ring 13 is inserted into said groove, which sealingly grips the plug part 3 when the sleeve 10 is depressed.

At the end of the bore 14 remote from the groove 12 is a stepped bore portion 15. The stepped flange 16 of the housing 17 of the lock cylinder 18 is frictionally engaged therein. Lock cylinder 18
The housing 17 has a central plug bore 19 for receiving a cylinder plug 20 (FIGS. 6 and 7). The cylinder plug 20 is fixed in the housing 17 so as not to move in the radial direction. For the cylinder plug 20,
A keyway 21 is provided therethrough for receiving the key 24. A wafer-type tumbler 22 extends obliquely with respect to the keyway 21 of the cylinder plug 20, and a diametrically opposed opening 23 of the housing 17 is associated with the tumbler. When the key 24 is not inserted, the end of the tumbler 22 engages the opening 23 to prevent the cylinder plug 20 from rotating with respect to the housing 17. Key 24 is the key path
When inserted into 21, tumbler 22 has an open end
Being retracted from 23, the cylinder plug can be rotated in a known manner in the housing 17.
The friction between the cylinder plug 20 and the lock cylinder housing 17 is
Is less than the friction created between the cylinder plug 20 and the bore 15 of the sleeve 10 so that when the key 24 rotates, the cylinder plug 20
Only move with the key.

A protrusion 25 extending in the radial direction is formed on the flange 16 of the cylinder plug 20 (FIGS. 5 and 7). This projection cooperates with a receiving surface 26 of the housing 17 of the lock cylinder. The receiving surface 26 is configured with respect to the protrusion 25 so that the cylinder plug 20 can be rotated by 45 degrees (see FIG. 7).

A hole 27 is formed in the cylinder housing 17 so as to be offset by 90 degrees from the opening 23, and this hole 27 merges with a wider hole portion 27 'toward the flange 16 (FIG. 4). In each hole, a double arm latch member 28 extending in the length direction of the lock cylinder 18 is received. This latch member constitutes a locking member. The latch member has at one end a latch head 29 wider than the latch shaft, said head 29 moving into a bore 27 'of the housing 17. The latch shaft extending from the latch head 29 is surrounded by an annular spring 31 having two coils, which spring engages in an outwardly open recess 30 of the latch shaft. Housing in the corresponding area to receive the annular spring 31
17 has a stepped annular zone. The latch shaft is divided into two latch arms 28 'and 28 "by an annular spring 31 which engages a latch member 28. The shorter latch arm 28' abuts the shoulder 33 of the housing 17 (fifth). (See Figure), the longer latch arm 28 "is integral with the latch head 29.

When the key 24 is removed and thus the lock cylinder is in the locked position, the latch arm 28 '
(See FIGS. 5 and 6). Hole
Another support point is formed by the edge 34 between the outer surface of the cylinder plug 20 and the engagement member 28.
Is in the precisely specified location.

When the hexagonal head 4 is to be covered with the sleeve 10, the sleeve 10 must be pushed into the hexagonal head. In doing so, the latch head 29 is gradually engaged by the inwardly inclined surface 7 of the hexagonal head 4, so that the locking member 28 pivots against the spring load. When pushed further, the latch head 29 moves past the radial shoulder 6, so that the locking member 28 is acted upon by the spring 31 in the position behind the radial shoulder shown in FIG. Snap-fit to Next, the sleeve is fixed so as not to come off by the lock cylinder 18 projecting into the bore 5. The pulling force applied to the sleeve 10 causes the locking member 28 to abut the radial shoulder 6, which is supported by the shoulder 33 of the lock cylinder housing 17. Nevertheless, the sleeve 10 can rotate on the hexagonal head 4.

Key 24 is required to remove the sleeve. Key 24
As a result, the cylinder plug 20 is rotated in the direction of the arrow from the position shown in FIG. At that time, the shorter latch arm 2
8 'exits through hole 34 and engages the outer surface of cylinder plug 20.
As a result, the latch head 29 of the locking member 28
The latch head can no longer engage the radial shoulder 6 of the hexagonal head 4. The sleeve 10 together with the lock cylinder 18 can then be removed from the hexagonal head as a composite unit.

In the second embodiment shown in FIGS. 8 and 9, the wheel bolt 1 'is fixed. The bolt has a threaded shaft 42 extending into a clamping cone portion 43. Adjacent to this is a hexagonal head 4 having an inner annular groove 46 adjacent the free end. Thus, the groove 46 forms a radial shoulder 6 '. The inner inclined surface 7 '(in this case having a larger dimension than in the first embodiment) cooperates with a locking member 36 in the form of an annular leaf spring, which extends circumferentially around the cylinder plug 20'. Extend and the diameter can be reduced by rotation of the cylinder plug. The leaf spring has a fixed end 36 ', which is bent inwardly towards the plug and which has a cross slot in the cylinder plug 20'.
It protrudes into 37 and is fixed to it. Annular leaf spring
Fixed end 3 of the other 36 (also bent inward)
6 "engages the receiving surface 38 of the lock cylinder housing 17 'and is spaced from the fixed end 36' by a distance X of about 1/4 of a circle.

The width of the annular leaf spring 36 is equal to the annular groove 46 of the hexagonal head 4.
Somewhat narrower than the width of.

When the key is not inserted, the annular leaf spring 36 is in a relaxed position (as shown in phantom) and extends with the portion 36 beyond the lock cylinder housing 17 '. When the sleeve 10 in this position is pushed into the hexagonal head, one edge S of the annular leaf spring 36 engages the inwardly inclined surface 7 '. This reduces the diameter of the annular leaf spring 36 so that the annular leaf spring 36 can be relaxed and snap-fit into the annular groove 46 of the hexagonal head 4 (indicated by dashed lines) at the sleeve 10 '. Can be pushed completely to achieve a secure lock. A distance X of 1/4 of the circle allows a flexible movement of one fixed end 36 "of the annular leaf spring 36. The removal of the sleeve is effected by means of a suitable key. 9, the part 36 exits the annular groove 46 of the hexagonal head and the sleeve together with the lock cylinder can be removed.

In this embodiment, an annular leaf spring that is not in a tension state is used.
When the sleeve is mounted on the hexagonal head with 36, the ring leaf spring makes a sound as it engages in the annular groove 46. In order to maintain the continuous flexibility of the annular leaf spring, the inwardly sloping surface is preferably helically shaped, thus increasing the depth.

Further, it is possible to provide another leaf spring behind such an annular leaf spring 36. In this case, the hexagonal head must be provided with a corresponding number of other annular grooves after the annular groove, each annular groove having an inwardly inclined surface.

 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-B-60-30561 (JP, B2) JP-B 54-41887 (JP, Y2) JP-B-49-26634 (JP, Y2) JP-B 62- 19441 (JP, Y2)

Claims (7)

(57) [Claims] An anti-theft wheel securing device comprising a sleeve (10) surrounding a polygonal head (4) of a wheel nut or bolt, said sleeve being rotatable over said polygonal head and In cooperation with the lock cylinder (18), a cylinder plug (20) of said lock cylinder forming a keyway (21) controls a locking member (28), and a radial shoulder (6) is connected to said locking member. In connection therewith, the engagement of the locking member (28) with the radial shoulder (6) is
In a device released by rotation of a cylinder plug (20) by a key (24), the locking member (28) has the form of a double-arm latch, the double-arm latch having the length of the lock cylinder. A latch head (29) extending in one direction and disposed at one end (28 "), and in the region of the other end (28 ')
It is surrounded by an annular spring (31) extending circumferentially around the cylinder plug (20), so that the latch head (29) is moved outward from the cylinder plug (20) by the annular spring (31). A device characterized in that it is spring-loaded and snaps behind the radial shoulder (6) when the sleeve (10) is pushed into the polygonal head (4). 2. An inwardly inclined surface (7) of a polygonal head (4).
Is arranged outside the radial shoulder (6). 3. The method according to claim 1, wherein the annular spring is located in a recess opened to the outside of the locking member. The described device. 4. The locking member according to claim 1, wherein said locking members comprise a plurality of locking members arranged symmetrically with respect to each other and surrounded by a common annular spring. 1
Item 4. The apparatus according to any one of Items 3 to 3. 5. A latch head (29) comprising: a latch member (28);
An apparatus according to any of claims 1 to 4, characterized in that it is circumferentially wide relative to said shaft. 6. An anti-theft wheel fixing device comprising a sleeve (10 ') surrounding a polygonal head (4) of a wheel nut or bolt, said sleeve being rotatable over said polygonal head. And in cooperation with the lock cylinder (18),
The cylinder plug (20 ') of the lock cylinder forming the keyway (21) controls the locking member (26), and the radial shoulder (6') engages with and is associated with the locking member. The engagement of the locking member (36) with the radial shoulder (6 ') is released by the rotation of the cylinder plug (20') by the key (24). Comprises an annular leaf spring extending circumferentially around the cylinder plug (20 '), the diameter of which can be reduced by rotation of the cylinder plug (20'), the larger diameter of the non-tensile spring. An apparatus, characterized in that in its condition it projects outwardly, a part (36) of its overall length cooperating with a radial shoulder (6 '). 7. An inwardly bent one end (36 ") of the annular leaf spring (36) engages behind a receiving surface (38), which receiving surface of the annular leaf spring (36). The other end (36 ') is spaced from the other end (36') by a distance (x) of approximately 1/4 of a circle, said other end (36 ') being fixed to a plug (20'). The apparatus according to claim 6, wherein