EP1132552B1 - Lock with tumblers - Google Patents

Description

The invention relates to a lock according to the preamble of claim 1. Furthermore, the invention relates to a method for recoding a lock with tumblers according to at least claim 1, wherein the tumblers are brought in a lock case by means of a key about a rotation axis in a predetermined position be moved and by means of a rotatable by the key actuator a bolt in the lock case, the key is removable only in one position and positionable in several positions.

Locks of the generic type are already known. By means of a key having a key bit with different depths incisions, thin plates, preferably metal plates, which are referred to as tumblers, pivoted to different degrees by a predetermined pivot point. Each of the tumblers is provided with at least one recess into which engages at least a portion of a locking bolt. Locks of the generic type are equipped with several such tumblers so that they must be pivoted as described above with a corresponding key so as to align the recesses so that the locking bar or parts of the locking bar can engage in this now uniform recess. For example, to recode such a lock to another key if the key is lost, other tumblers or existing ones must be used in a different order.

An already simplified solution is proposed in EP 0 663 497 A2; Here, a recodable lock is described having a plurality of spring-loaded tumblers each pivotable about a pivot axis and apertured at their ends remote from the pivot axis for receiving therein a leg of a fence blade mounted such that it can move transversely to the direction of movement of the lock bolt.

The fence blades are provided with a toothing, which are fixed in position via a spring-loaded coding device. In order to recode, a Umkodierzapfen is actuated in the lock case and pressed axially inward to achieve that during the rotation of the key, ie during the closing process, the coding no longer engages the toothing of the fence slats and thus their fixation is repealed.

The recoding pin remains in this depressed position as it is held over a pin. After replacing the key by a new key, which is possible after a rotation of 180 °, the tumblers are raised during the closing process by the key teeth and take a new position. At the same time the fence slats are moved transversely to the bolt, because the legs of the fence slats are still in contact with the tumblers. As a result of the further rotation of the key, the recoding pin is also released again and automatically moves from its depressed position into its starting position, since it is spring-loaded.

The recoding thus takes place in that the position of the legs, which engage in the tumblers, is changed relative to the bolt. Such recombinations are relatively expensive, since a plurality of parts are used to achieve the desired recoding.

A generic lock is also known from DE-PS 565 027 known. In this lock, the tumblers on their end facing away from the latch on slot-shaped recesses into which engages a web. Different codes can be achieved by a different engagement of the web be set in one of the recesses. To adjust, it is necessary to move the bridge within the lock box, whereby a large lock box is required.

From US-A-4 072 032 another lock is known. This prior art lock consists of a lock case in which two sets of tumblers are arranged, which tumblers are adjustable via two keys to release a lock in the lock box arranged latch in the direction of displacement. The tumblers, which are movable by means of two keys, have different designs and are oriented oppositely, so that two locking elements of the bolt can only be pushed into corresponding recesses of the tumblers if the tumblers are correspondingly provided with their recesses by the position of the applicable key. The tumblers can be adjusted depending on the key. For this purpose, an axis of rotation is provided which is adjustable from outside the lock case. The axis of rotation is formed by a nose on a rotary member, wherein the nose engage in corresponding teeth of the tumblers.

To adjust this prior art lock is provided that a special key is inserted, which allows a further rotation of a lock compared to a monitoring key, whereby the relevant tumblers are placed in a position in which the rotary member is rotatable relative to the tumblers so that the relevant nose engages in a different detent. The same applies to the set of other tumblers, which are opposite to the first-mentioned tumblers.

Finally, FR-A-2 535 772 discloses a lock which has different tumblers which are oppositely arranged in a lock case, so that also in this lock two keys are necessary for actuation. A displacement of the tumblers relative to the axis of rotation is not provided here.

Starting from this prior art, the invention has the object of developing a preferably aufsperrgeschütztes lock so that the recoding is easier to handle and minimizes reached the inserts or simplified to reduce the cost.

The solution to this problem provides that an elastic element is arranged transversely to the direction of rotation of the tumblers and that the tumblers are acted upon by the elastic element, so that they are displaceable transversely to its pivoting direction.

The rotary member is positively connected to a locking element which is equipped with a link which is acted upon by a guide element which is connected to the latch. This ensures that the lock can be adapted to a new key, without exchanging the tumblers. In a relative to the lock case different position of the tumblers in their zero position, it is by design excluded that all tumblers rest on the bolt. This is also kinematic reasons, since no curve over all adjustment positions of the tumblers forms a constant distance to the bolt. Although it is possible to iteratively establish an approximation curve and thus to minimize the distance difference, but there is always a difference. Therefore, it is provided to use an elastic element, for example an elastomer profile, so that the tumblers are slightly displaceable in their longitudinal direction with respect to the direction of movement of the bolt. It is thus ensured that, in the case of an externally acting displacement force on the bolt, the tumblers which first come into contact with the bolt can dodge until the difference in length has been absorbed and all tumblers on the bolt come to rest. A Aufsperrversuch, in which just by said pressing the bolt against the tumblers by means of a wire is trying to pivot each tumbler in its unlocked position, thus effectively prevented because not only a tumbler rests on the bolt.

It is envisaged that the nose fixes the tumblers in their fulcrum position. The shape of the nose is designed so that it engages in the corresponding notches of the tumblers.

The tumblers are particularly identical in shape, so that no different tumblers must be installed in a predetermined order during assembly of the castle. This results on the one hand economic advantages in terms of keeping the tumblers and on the other hand simplified assembly, since the use of identical tumblers no detailed installation instructions must be given. The identity of the tumblers extends in particular to the Tourkananl and the closing curve. Due to the convertibility of the tumblers by means of the rotary element in combination with a toothing the tumblers can be arranged even with identical design such that the necessary safety requirements are met in such a lock.

Preferably, the notches in the tumblers are designed as a row of teeth. Advantageously, the rotary member can be pivoted with a commercial screwdriver. But it is also an embodiment conceivable in which the rotary member is pivoted with a commercial hex key.

Of particular importance is the locking element; this is equipped with a backdrop into which a guide element which is firmly connected to the latch, engages. The scenery is designed so that pivoting is possible only in a predetermined position of the bolt.

As a further development means are provided for guiding the key, which are designed for example as a dome and / or as an actuating element, wherein the dome engages in the tip of the key and the actuating element is in operative connection with the key. By the actuator, the bolt is moved over a driver.

In order to prevent snagging, the tumblers are designed according to the training with beads that are designed differently in adjacent tumblers. This ensures that the tumblers are not flat to each other, but are spaced in each of their pivotal position. An elaborate deburring can thus be dispensed with.

Furthermore, the tumblers, due to their shape design, loaded in each of their pivotal position with the same spring force. The same applies to a defined deflection. D. h., If, for example, the tumblers, which occupy different positions relative to the lock case by their setting in their zero position, are deflected by actuation in the direction of rotation, each of the tumblers is claimed for a same large deflection by an angle β with equal torque ; an end position determination of the tumblers on their restoring force by the spring is thus excluded. This applies regardless of which setting position was assigned to the guard in the coding.

An advantageous embodiment of the lock according to the invention provides that between the means for guiding the key and the tumblers a shielding is arranged, or that the tumblers are designed so that they are always acted upon by a same initial spring force. Alternatively it can be provided that an actuating element is provided for the articulation of the tumblers, or that the tumblers are acted upon transversely to its direction of rotation by an elastic element.

These developments ensure that a scanning of the tumblers is prevented. Due to the shielding element, it is no longer possible to spy on the individual pivoting positions of the tumblers, for example with a thin wire. The access to the tumblers is prevented by the shielding, which is advantageously connected to the lock case.

The shape of the tumblers is chosen so that they have the same distance from the spring seat to the axis of rotation of the key in each of its zero positions - closed position of the bolt and no action by key or actuator - and thus acted upon by a same initial spring force. It is thus also prevented a spying, since it can not be determined which tumbler is further pivoted; nor is it possible to use the restoring force of the spring to determine which end position is intended for the tumbler. Also, for example, can not be determined by means of a miniature lens, which tumbler is acted upon by which key incision, as by an actuator that is operatively connected to the key and preferably equipped with a projection, each of the tumblers is articulated at the same point and thus uniform contact traces be generated on all tumblers.

The actuator is equipped according to a development with only one slot-like opening, so that an all-round scanning is prevented. Through this slot-like opening and the beard of the key to deflect the tumblers. The actuator is designed so that while using a example wrong key or a key-like object, although a rotation is possible, but the possible angle of rotation is limited. This also limits the possible scanning angle in the same way.

Furthermore, it is provided that the actuating element has a driver, which allows the displacement of the bolt. This driver is designed so that it shears in case of violence, for example, due to a predetermined breaking point, and thus prevents a displacement of the bolt is prevented. Preferably, the actuating element is made of thermoplastic material, so that it is destroyed by increased heat and thus also the displacement of the bolt is prevented.

Due to the design, it is impossible that all tumblers rest on the bolt. This is also kinematic reasons, since no curve over all adjustment positions the tumblers forms a constant distance to the bolt.

The bolt has leg-like projections, which are designed with at least one nose. Through these projections, in conjunction with the lugs, it is ensured that always a portion of the bolt is in communication with the tumblers. The effect of the elastic element is thus supported.

Figur 1

eine teilweise geschnittene perspektivische Darstellung einer ersten Ausführungsform eines Schlosses;

Figur 2

das Schloss gemäß Figur 1 in verriegelter Stellung;

Figur 3

das Schloß gemäß den Figuren 1 und 2 während eines Verfahrensschrittes zum Umkodieren;

Figur 4

das Schloss gemäß den Figuren 1 bis 3 im Längsschnitt;

Figur 5a - c

drei Schlüsselstellungen im Schloss gemäß den Figuren 1 bis 4;

Figur 6

eine teilweise geschnittene perspektivische Darstellung einer zweiten Ausführungsform eines Schlosses;

Figur 7

das Schloss gemäß Figur 6 im Längsschnitt und

Figur 8

das Schloss gemäß den Figuren 6 und 7 im Querschnitt.

Other features and advantages will become apparent from the following description of the accompanying drawings. In the drawing, an embodiment of the invention is shown. In the drawing show:

FIG. 1

a partially cutaway perspective view of a first embodiment of a lock;

FIG. 2

the lock of Figure 1 in the locked position;

FIG. 3

the lock according to Figures 1 and 2 during a process step for transcoding;

FIG. 4

the lock according to the figures 1 to 3 in longitudinal section;

FIG. 5a-c

three key positions in the lock according to Figures 1 to 4;

FIG. 6

a partially sectioned perspective view of a second embodiment of a lock;

FIG. 7

the lock according to Figure 6 in longitudinal section and

FIG. 8

the lock according to Figures 6 and 7 in cross section.

In Figure 1, a lock is shown schematically in perspective, showing a lock case 1 with inserted key 6. Parts of the lock case 1 are shown broken to make areal tumblers 3 recognizable that always press on springs 4 against an actuating element 5. The bolt 2 is guided in the lock case 1 and can only be moved in its longitudinal axis when the tumblers 3 are brought via the key 6 in a predetermined position. Furthermore, in Figure 1, a rotation axis 8 of the tumblers 3 can be seen, which is connected to a locking element 7.

Figure 2 shows an example of a tumbler 3 with a portion of the bolt 2 in its closed position. In this position, the key 6 is removable. A rotary member 11 with an attached nose 9, about which the tumblers 3 pivot, is in its initial position with a tooth of a row of teeth 10 in engagement. In this position, the bolt 2, the pivoting of the rotary member 11 is prevented, since pivoting of the rotary member 11 is prevented by a guide element, not shown, which is in communication with the locking element 7.

FIG. 3 shows the position of the lock during a recoding.

The actuator 5 and the key 6 have been rotated from the zero position a in a first detent position b and thus the tumblers 3 in response to the corresponding height of the key bit to a corresponding Angle has been pivoted about the axis of rotation 8. Leg-like projections 12 of the bolt 2 engage in recesses 13 of the tumblers 3 a. In this position, it is possible that the rotary member 11 can be pivoted α by a predetermined angle, the nose 9, which is located on the rotary member 11, is disengaged from the teeth 10 of the tumblers 3. The actuation of the rotary member 11 is possible from outside the lock case 1. In this position, the bolt 2, the pivoting of the rotary member 11 is made possible because of the design of a link, the locking element 7 is released.

After pivoting of the rotary member 11 further rotation of the key 6 and the actuating element 5 from the first position b in a second position c is possible, which again corresponds to the starting position a, the key 6 has thus been rotated 360 ° and can now by a second key 6 'are exchanged, this differs in the Bart execution of the first key 6. Due to the backdrop in Verrieglungeselement 7 in connection with the connected via the bolt 2 actuator 5, an unintentional turning back of the key 6 on the position b is also prevented. An uncontrolled adjustment of the tumblers 3 is thus excluded.

The new key 6 'is now rotated from the second position c in the first position b, wherein the tumblers 3 are moved relative to the rotary member 11. Due to the structural design of the actuating element 5 and the locking element 7, it is necessary to pivot the rotary member 11 by the angle α to its initial position to bring the nose 9 of the rotary member 11 with the teeth 10 into engagement before further rotation of the key 6 'is possible. The axis of rotation 8 of each tumbler 3 is thus changed and has been recoded to the new key 6 '.

The interaction of the individual parts is illustrated once again in FIG. Key 6 and actuating element 5 lie on a common axis of rotation, wherein the actuating element 5 is fixed in the lock case 1. About a driver 16 of the bolt 2 is moved. A guide member 17 on the bolt 2 is engaged in a gate of the Verrieglungselementes 7. The locking element 7 is positively connected to the rotary member 11 to which the nose 9 is located, which engages in the toothing 10 of the tumblers 3. The tumblers 3 are pivotable about this nose 9. The contact edge of the nose 9 thus forms the axis of rotation 8 of the tumblers 3. The rotary member 11 is also guided in the lock case 1 and is accessible from the outside.

FIG. 5 again illustrates the individual positions a - c of the key 6. FIG. 5a shows the starting position a. The first position b is shown in Figure 5b, this is achieved after a predetermined rotation of the key 6 and the actuating element 5. The second position c is shown in FIG. 5c, which again corresponds to the position a according to FIG. 5a. For easier locating individual positions detents can be provided via a spring-loaded ball or outside the castle a mark can be attached.

With the lock according to the invention, it is possible to recode from one to another key with a simple design.

A further embodiment of the invention is shown in FIGS. 6 to 8. The perspective view of the lock according to Figure 6 shows the lock case 1 with the bolt 2 and inserted key 6. The partially broken view, the tumblers 3 and springs 4 can be seen in the upper area, which act on the tumblers 3.

FIG. 7 shows a longitudinal section through the lock case 1. The standing in the closed position latch 2 has leg-like projections 12 which are provided with lugs 21. These lugs 21 ensure early engagement of the bolt 2 on the tumblers 3 and simulate in conjunction with tooth-like projections 60 on the tumblers 3 a locking of the bolt. 2

The tumblers 3 can be pivoted about the axis of rotation 9 in the direction w. By the application of the elastic element 14, the above-described Rastenimulation is supported. The tumbler 3 is designed so that the distance X in each of its zero position is constant., Regardless of the assumed pivot point about the axis of rotation 9. This also ensures that the initial spring force generated by the springs 4, equal to all zero positions is.

Each tumbler 3 is designed with a bead 40, which ensures a spacing to each adjacent tumbler 3.

The inserted key 6, which is guided via a key guide - here a mandrel 15, is in operative connection with the actuating element 5. The key bit can be brought over the slot-like opening 18 on the tumblers 3 for engagement and distracts them, due to the height of the beard, different. By attached to the actuator 5 projection 50 each tumbler 3 is hinged at the same place; As a result, uniform contacts are created, thus preventing any inference to the point of articulation by the key bit.

When not inserted key 6, as shown in Figure 7, a scanning by means of a wire would be conceivable. The access to the tumblers 3 but on the one hand by the design of the actuating element 5 with its slot-like opening 18 and the projection 50 and on the other hand by the shielding 25 so difficult that a reliable determination of the position of the tumbler 3 is not possible.

The sectional view in Figure 8 illustrates the spacing of the tumblers 3 through the beads 40. Furthermore, the application of the tumblers 3 by the elastic element 14 and the actuating element 5, which is shown on the Driver 6 with the bolt 2 is in communication. The executed as a dome 15 key guide element for the key 6 is anchored in the lock case 1.

With the measures shown, the Aufsperrsicherheit a lock can be significantly increased.

• Verdrehen des Schlüssels von einer Nullstellung a in eine erste Position b, wobei die Zuhaltungen 3 um eine Drehachse 8 verschwenkt werden und die beinartigen Vorsprünge 12 des Riegels 2 in die Aussparungen 13 der Zuhaltungen 3 eingreifen,
• Verschwenken des Drehelementes 11 um einen Winkel α, wobei eine Nase 9 am Drehelement 11 aus der Aussparung 10 der Zuhaltungen 3 außer Eingriff gebracht wird, wobei das Drehelement 11 mit einem Verriegelungselement 7 verbunden ist, das über eine Kulisse durch ein Führungselement 17 mit dem Riegel 2 in Verbindung steht und das Verschwenken nur ermöglicht, wenn dieser das Verriegelungselement 7 frei gibt,
• weiteres Verdrehen des Schlüssels 6 von der ersten Position b in eine zweite Position c; in dieser Position c werden sowohl der Riegel 2 als auch die Zuhaltungen 3 über den Mitnehmer 16 des Betätigungselementes 5 in ihrer Lage fixiert.

The problem-solving inventive method for transcoding a lock with spring-loaded tumblers, has the following steps:

• Turning the key from a zero position a to a first position b, wherein the tumblers 3 are pivoted about an axis of rotation 8 and the leg-like projections 12 of the bolt 2 engage in the recesses 13 of the tumblers 3,
• Swiveling of the rotary member 11 by an angle α, wherein a nose 9 is brought out of engagement on the rotary member 11 from the recess 10 of the tumblers 3, wherein the rotary member 11 is connected to a locking element 7, which via a link through a guide member 17 with the bolt 2 is in communication and allows pivoting only if this releases the locking element 7,
• further turning the key 6 from the first position b to a second position c; in this position c, both the bolt 2 and the tumblers 3 are fixed in position via the driver 16 of the actuating element 5.

The next step, namely

Removing the first key can be done safely. Subsequently, a second key is inserted, which differs in the Bart execution of the first key. By further rotation of the second key from the second position c to the first position b, the tumblers 3 shifted relative to the rotary member 11. Finally, the rotary member 11 is pivoted to its initial position to bring the nose 9 of the rotary member 11 in the recess 10 of the tumblers 3 in engagement.

The position of the fulcrum of each tumbler 3 is thus changed, whereby a recoding, matching the new key, is achieved.

LIST OF REFERENCE NUMBERS

1

lock case

2

bars

3

tumblers

4

Spring for tumbler 3

5

Actuating element for bolt 2

6

key

7

locking element

8th

Swivel axis of the tumbler 3

9

nose

10

Notches in tumbler 3

11

rotating member

12

Leg-like projections of the bolt 2

13

Recess in tumbler 3

14

elastic member

15

cathedral

16

Carrier for bolt 2

17

guide element

18

slit-like opening in 7

21

Nose on 9

25

shielding

40

Beading

50

Lead on 7

60

Tooth-like projections on 3

α

Twist angle at 7

x

Distance from key rotation axis to spring support

ω

Direction of rotation of the tumblers 3

Claims (30)

1. Lock with tumblers (3) in a substantially flat case (1), wherein in said case (1) a lock bolt (2) is arranged for sliding, said tumblers (3) are arranged for pivoting about a rotational axis (8), said tumblers (3) are adjustable in their position relative to rotational axis (8) in the direction of their surface, the adjustment taking place essentially at right angles to the sliding direction of lock bolt (2), and wherein a key (6) is provided for pivoting said tumblers (3), and said rotational axis (8) of said tumblers (3) is formed by a nose (9) on a rotational element (11),
   characterized in
   that transversely to the rotational direction (ω) of said tumblers (3) an elastic element (14) is arranged and that said tumblers (3) are acted upon by said elastic element (14), so that the same may be displaced transversely to their direction of pivoting.
2. Lock according to claim 1,
   characterized in
   that said tumblers (3) are identically formed with regard to their shape.
3. Lock according to claim 1,
   characterized in
   that said rotational element (11) may be accessed and rotated from outside of said case (1).
4. Lock according to claim 1,
   characterized in
   that said rotational element (11) is connected to a locking element (7), preferably in a form-fit fashion.
5. Lock according to claim 4,
   characterized in
   that said locking element (7) is equipped with a gate that is acted upon by a guide element which is connected to locking bolt (2).
6. Lock according to one or more of the claims 1 to 5,
   characterized in
   that said nose (9) fixes said tumblers (3) in their fulcrum position.
7. Lock according to one or more of the claims 1 to 6,
   characterized in
   that said nose (9) is formed in manner such that it is adapted to the shape of a notch (10).
8. Lock according to one or more of the preceding claims,
   characterized in
   that said notch (10) of tumbler (3) is formed as a series of teeth.
9. Lock according to one or more of the preceding claims,
   characterized in
   that for guiding key (6) means (15) are provided.
10. Lock according to claim 9,
    characterized in
    that said means (15) for guiding said key are a pin and/or an actuating element.
11. Lock according to claim 9,
    characterized in
    that between said means (15) for guiding key (6) and said tumblers (3) a shielding element (25) is arranged.
12. Lock according to one or more of the preceding claims,
    characterized in
    that an actuating element (5) for the articulation of said tumblers (3) is provided.
13. Lock according to one or more of the preceding claims,
    characterized in
    that said tumblers (3) are formed with beads (14).
14. Lock according to claim 4,
    characterized in
    that said beads (14) of adjacent tumblers (3) are differently configured.
15. Lock according to claim 4 or 14,
    characterized in
    that said tumblers (3) are spaced from each other by said beads (4) in each of their pivoting positions.
16. Lock according to one or more of the preceding claims,
    characterized in
    that said tumblers (3) are acted upon by spring-loaded elements (4).
17. Lock according to any one of the preceding claims,
    characterized in
    that said tumblers (3) are configured in a way such that the same are always loaded with the same initial spring force.
18. Lock according to one of the claims 16 or 17,
    characterized in
    that said tumblers (3) are configured in a way such that each tumbler (3) is loaded with an equally high spring force at the same extent of excursion.
19. Lock according to claim 18,
    characterized in
    that said tumblers (3) are configured in a way such that at the same extent of excursion every tumbler (3) is loaded with an equally high spring force, independently of the set position of the tumbler (3) about its rotational axis (8).
20. Lock according to claim 1,
    characterized in
    that said actuating element (5) and said locking element (7) are designed with a mutually corresponding gate.
21. Lock according to one or more of the preceding claims,
    characterized in
    that said locking bolt (2) includes leg-like projections (9).
22. Lock according to claim 21,
    characterized in
    that said projections (9) of said locking bolt (2) are designed with at least one nose (10).
23. Lock according to claim 1,
    characterized in
    that said elastic element (14) is an elastomer profile.
24. Lock according to claim 11,
    characterized in
    that said shielding element (25) is fixed to said case (1).
25. Lock according to claim 12,
    characterized in
    that said actuating element (5) is equipped with a projection (50).
26. Lock according to claim 25,
    characterized in
    that said actuating element (5) includes a slot-like opening (18).
27. Lock according to claim 25 or 26,
    characterized in
    that said actuating element (5) is designed with a driving feature (16).
28. Lock according to claim 27,
    characterized in
    that said driving feature (16) includes a predetermined breaking point.
29. Lock according to claim 12 or at least according to any one of the claims 25 to 28, characterized in
    that said actuating element (5) is made of a plastic material.
30. Method of converting the code of a lock with tumblers (3) according to one of the claims 1 to 29, wherein said tumblers (3) are brought into a predetermined position about a rotational axis (8) within a case (1) by means of key (6) and wherein a locking bolt (2) is displaced in said case (1) by means of an actuating element (5) that may be rotated by means of said key (6), which key (6) may be removed only in one position and may be positioned in several positions (a, b, c),
    characterized in
    that said converting of the code is effected in the following sequence:

    a) rotating said key from a zero-position (1) to a first locking position (b), with tumblers (3) being pivoted about a rotational axis (8) and the leg-like projections of the locking bolt (2) engaging in the recesses of said tumblers (3);

    b) pivoting said rotational axis (8) by an angle (α), with a nose (9) on rotational axis (8) being disengaged from the toothing (10) of the tumblers (3), with the rotational axis (8) being connected to a locking element (7) which is in connection with said locking bolt (2) through a gate and permits pivoting only if the same releases said locking element;

    c) further rotating said key from the first locking position (b) to a second position (c);

    d) removing the first key;

    e) inserting a second key, of which the beard is designed differently from the first key;

    f) rotating said second key from the second position (c) to the first locking position (b), with the tumblers (3) being displaced relative to the rotational axis (8);

    g) pivotally moving said rotational axis (8) to its initial position for engaging nose (9) of said rotational axis (8) in said toothing (10).

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