EP2295683B1 - Loop lock with offset cylinder axle - Google Patents

Description

The present invention relates to a loop lock, in particular chain or wire lock, with a lock body having a longitudinal axis and surrounding a cylinder housing a lock cylinder, and with a loop, wherein a first end of the loop is permanently attached to an attachment point of the cylinder housing and vertically is aligned with the longitudinal axis of the lock body, wherein a second end of the loop is releasably secured to a longitudinal end of the lock body and is aligned coaxially to the longitudinal axis of the lock body, and wherein in the cylinder housing, a cylinder core of the lock cylinder is rotatably mounted about an axis of rotation.

Such a loop lock is off DE 44 34 585 A1 known.

In such a lock an otherwise cylindrical lock body and / or a cylinder housing in the region of the attachment point for the first end of the loop is enlarged or provided with projections to provide a sufficient volume of material for a secure attachment of the first end of the loop. However, this leads to a relatively bulky configuration of the lock body.

Therefore, it is the object of the present invention to provide a lock of the type mentioned, which is easy to manufacture and compact in construction and in which nevertheless a secure attachment of the first end of the loop can be ensured.

The object is achieved by the features of claim 1 and in particular by the fact that the axis of rotation of the cylinder core is offset parallel to the longitudinal axis of the lock body, namely away from the attachment point for the first end of the loop.

Compared to a known from the prior art purely coaxial arrangement of the cylinder core with respect to the lock body and the cylinder housing, the cylinder housing thus has a greater thickness in the region of the attachment point, which is required for a mechanically strong attachment of the first end of the loop without but that the cylinder housing has to be extended in the region of the attachment point to the outside or provided with projections. Thus, overall, without sacrificing safety, a slimmer cylinder housing and a correspondingly smaller design of the lock body result.

Due to the thereby possible, easy to manufacture cylindrical shapes of the lock body and the cylinder housing without additional projections for receiving the first end of the loop loop lock invention is also easier and less expensive to manufacture.

According to a preferred embodiment, an axial extension of the cylinder housing serves as a clamp receptacle for the second end of the loop, wherein the axis of the Klobenaufnahme coincides with the longitudinal axis of the lock body. Thus, the axis of rotation of the cylinder core is also offset from the axis of the clamp receiver parallel and away from the attachment point for the first end of the loop.

Preferably, in the axial extension, in particular on its inner surface, an actuatable by the lock cylinder inner sleeve is rotatably received, which has a plurality of distributed over its circumference closing element receptacles.

According to a further advantageous embodiment, the axial extension has a plurality of, in particular axially introduced, the closing element receiving associated evasive openings.

In a further preferred embodiment closing elements are arranged in the closing element receptacles, which engage in a closed position relative to the axial extension in a closed position in a circumferential groove of a recorded in the Klobenaufnahme, forming the second end of the loop and in a release position in dependence on a rotational position of the inner sleeve the escape openings can recede for release of the block. As a result, a very compact closing mechanism is realized, which nevertheless reliably fixes the clamp in the closed position in the clamp receptacle.

Preferably, the escape openings relative to the inner surface of the axial extension in the direction of rotation of the inner sleeve inclined control surfaces, which are adapted to control the closing elements between the closed position and the release position. During a rotational movement into the closed position, the inclined control surfaces come into contact with the closing elements and, with increasing rotation of the inner sleeve, also move them increasingly radially inwards so that the closing elements can then finally engage in the circumferential groove of the clamp received in the clamp receptacle. Upon rotation of the inner sleeve in the release position, the hidden in the closed position escape openings are released, so that the closing elements back radially in the escape the escape openings can, whereby the interior of the Klobenaufnahme is released to remove the block.

Preferably, the cylinder core on its side facing away from a key receptacle end face an eccentrically arranged on the axis of rotation of the cylinder core driving pin, which cooperates with a provided on a cylinder core end face of the inner sleeve control link, in particular a slot for actuating the inner sleeve. The combination of driving pin and control link realized in a simple manner a transmission of a rotational movement of the cylinder core on the inner sleeve despite the axial offset of the axes of rotation of the cylinder core and inner sleeve.

According to a further preferred embodiment, two steel pins are inserted parallel to each other and parallel to the longitudinal axis of the lock body in the cylinder housing, that the two steel pins engage tangentially in an annular groove of a attached to the first end of the loop fitting. The steel pins are used in that region of the cylinder housing, which according to the invention has an increased thickness due to the eccentric arrangement of the cylinder core in the lock body. Instead of fastening with steel pins, any other type of fastening can also be realized in the region of increased thickness; in particular, fastening by means of a snap ring, a U-shaped bracket or only one pin would also be possible.

Further preferred embodiments of the invention are indicated in the dependent claims, the description and the drawing.

Fig. 1

ein erfindungsgemäßes Schlaufenschloss gemäß einem Ausführungsbeispiel in teilweiser Schnittansicht;

Fig. 2

eine perspektivische Ansicht einer Innenhülse des Schlaufenschlosses von Fig. 1;

Fig. 3

eine Explosionsdarstellung des Schlaufenschlosses von Fig. 1;

Fig. 4

eine perspektivische Ansicht des Schlaufenschlosses gemäß Fig. 1 unter Weglassung des Schlosskörpers; und

Fig. 5 und 6

eine ausschnittsweise Schnittdarstellung durch das Schlaufenschloss gemäß Fig. 1 in einer Freigabestel- lung und einer Schließstellung.

The invention will be described below with reference to an embodiment with reference to the drawing. Show it:

Fig. 1

an inventive loop lock according to an embodiment in partial sectional view;

Fig. 2

a perspective view of an inner sleeve of the loop lock of Fig. 1 ;

Fig. 3

an exploded view of the loop lock of Fig. 1 ;

Fig. 4

a perspective view of the loop lock according to Fig. 1 omitting the lock body; and

FIGS. 5 and 6

a partial sectional view through the loop lock according to Fig. 1 in a release position and a closed position.

According to Fig. 1 to 6 an inventive loop lock comprises a cylindrical lock body 10 which surrounds a likewise cylindrical cylinder housing 12 of a lock cylinder. In the cylinder housing 12, a cylinder core 20 is provided which has a plurality of actuatable by means of a key 46, known per se locking members. In a closed position of the loop lock according to the invention a rotation of the cylinder core 20 is not possible with removed key 46. The axis of rotation Z of the cylinder core 20 is offset in parallel with respect to the longitudinal axis S of the lock body 10.

By this offset, the cylinder housing 12 in the region of the cylinder core 20 on different wall thicknesses. In the peripheral region of the largest wall thickness, a connection piece receptacle 40 in the form of a radial bore is provided, into which a connection piece 16 of a loop 14 is received. In the present embodiment, the loop 14 shown only in sections is formed as a chain, but also an embodiment as a wire rope or other suitable manner is possible.

The connecting piece 16 has at its free end, which is received in the connection piece receptacle 40, an annular groove 42 into which two parallel spaced and parallel to the longitudinal axis S aligned, inserted into corresponding axial bores 56 of the cylinder housing 12 steel pins 44 and thus engage the Connecting piece 16 fixed, but rotatably connect to the cylinder housing 12 about its longitudinal axis.

On the inner surface of the axial extension 28, an operable by the cylinder core 20, cup-shaped inner sleeve 22 is rotatably received. The inner sleeve 22 has three distributed over its circumference closing element receptacles 24, in each of which a closing element formed here as a closing ball 32 is movably received in the radial direction. The preferably designed as radial bores closing element receivers 24 are configured such that the closing balls 32 extend only to a certain extent in the interior of the inner sleeve 22 and in particular can not fall out of the closing element receptacles 24.

The cup-shaped inner sleeve 22 forms with its open side a clamp receptacle 50, in which in the closed position of the loop lock at the other free end of the loop 14 fastened clamp 18 is added. The block 18 has a circumferential groove 30 into which the closing balls 32 in the in Fig. 1 and 6 engage shown closed position.

The inner sleeve 22 has, on the outside, its end face facing away from the clamp receiver 50, i. at its bottom, an oblong hole 38 which cooperates with a driving pin 36 which is arranged at the side facing away from a receptacle for the key 46 end face of the cylinder core 20 radially spaced from the axis of rotation Z and engages in the slot 38. A rotary actuation of the cylinder core 20 is converted via the driving pin 36 and the slot 38 in a rotational movement of the inner sleeve 22. Through the slot 38, a occurring during the actuation of the cylinder core 20 radial relative movement between the driving pin 36 and the inner sleeve 22 is compensated.

The axial extension 28 has three distributed over its circumference evasion openings 26, which are associated with the closing element receptacles 24 and cover them in the release position. The escape openings 26 may be formed as radially introduced holes whose diameter is slightly larger than the diameter of the closing element receptacles 24, in particular to compensate for manufacturing tolerances. The edge of the escape openings 26 may be chamfered to form a control surface 34 for the closing balls 32, for example by countersinking the bores or by conical bores. Alternatively, the escape openings 26 may also be formed as bores which are within a normal plane to the longitudinal axis S of the lock body 10 (ie within the cutting plane in accordance with FIGS. 5 and 6 ) are aligned obliquely with respect to a radial orientation, that is, the respective axis of the escape openings 26 does not intersect the longitudinal axis S. By can be ensured in a particularly simple production a jam-free entry of the closing balls 32 in the escape openings 26. As an alternative to the formation as bores, the escape openings 26 can also be designed as slots which are axially introduced at the free end of the axial extension 28.

The end of the lock body 10 facing the clamp receptacle 50 is bent radially inwards and engages over the cylinder housing 12 including the axial extension 28 and the inner sleeve 22. In the other end of the lock body 10 is provided a cover cap 48 provided with an opening for the key 46, which is inextricably connected to the lock body 10 by means of locking pins 52, which are received in frictionally engaged in provided in along the circumference of the lock body 10 holes in the lock body 10 and the cover 48. Cylinder housing 10, cylinder core 20 and inner sleeve 22 are fixed in the axial direction by the cap 48 connected to the lock body 10.

Between the cylinder core 20 and the cap 48 may additionally be in Fig. 3 shown Aufbohrschutzplatte 54 may be arranged.

In Fig. 4 the loop lock according to the invention is shown without the lock body 10. In this case, the two axial bores 56 can be seen, into which the steel pins 44 are pressed for fastening the connection piece 16 in the connection piece receptacle 40.

With reference to the FIGS. 5 and 6 that are part of one along a plane AA ( Fig. 1 ) extending cross-section, the locking mechanism for the clamp 18 will now be explained. In the in Fig. 5 shown release position is aligned with the closing element receiving 24 with the Ausweichöffnung 26. If now the inner sleeve 22 relative to the axial extension 28 is rotated counterclockwise, so in the course of the rotational movement held in the Schließelementaufnahme 24 closing ball 32 is pressed against the provided on the edge of the escape opening 26 control surface 34 which against the inner surface of the axial Extension 28 is inclined in the direction of rotation of the inner sleeve 22. As a result, the closing ball 32 is displaced radially inward and passes, as in Fig. 6 shown in the circumferential groove 30 of the inserted into the Klobenaufnahme 50 block 18. In this closed position, the circumferential groove 30 engages behind the closing ball 32, so that the clamp 18 is rotatably secured about its longitudinal axis in the Klobenaufnahme 50.

Now, if the inner sleeve 22 is rotated clockwise, it returns to the position according to Fig. 5 back, so that again the closing element receiving 24 is aligned with the escape opening 26. When pulling out the block 18, the closing ball 32 can recede into the escape opening 26 and thus releases the block 16 again.

It has been found that the escape openings 26 need not necessarily be provided with bevelled control surfaces 34, since due to the spherical shape of the closing balls 32, a jam-free control is ensured even with cylindrical escape openings 26.

As in the Fig. 1 . 3 and 4 can be clearly seen, the lock body 10 and the cylinder housing 12 may be formed with a substantially cylindrical contour without disturbing projections or thickening. Due to the off-center offset arrangement of the cylinder core 20 is in a peripheral region of the cylinder housing 12, which corresponds to the attachment point for the loop 14, yet a sufficient material thickness available to reliably secure the connector 16 in the terminal receptacle 40 can.

LIST OF REFERENCE NUMBERS

10

lock body

12

cylinder housing

14

loop

16

connector

18

Kloben

20

cylinder core

22

inner sleeve

24

Closing element receptacle

26

pass opening

28

axial extension

30

circumferential groove

32

closing ball

34

control surface

36

driving pins

38

Long hole

40

Terminal receiving

42

ring groove

44

steel pin

46

key

48

cap

50

Klobenaufnahme

52

safety pin

54

Aufbohrschutzplatte

56

axial bore

S

Longitudinal axis of 10

Z

Rotation axis of 20

Claims (12)

1. A loop lock, in particular a chain lock or a wire cable lock, having a lock body (10) which has a longitudinal axis (S) and which surrounds a cylinder housing (12) of a lock cylinder, and having a loop (14),
   wherein a first end (16) of the loop (14) is permanently fastened to a fastening point of the cylinder housing (12) and is aligned perpendicular to the longitudinal axis (S) of the lock body (10); wherein a second end (18) of the loop (14) can be releasably fastened to a longitudinal end (28) of the lock body (10) and is aligned coaxially to the longitudinal axis (S) of the lock body (10); and wherein a cylinder core (20) of the lock cylinder is rotatably supported about an axis of rotation (Z) in the cylinder housing (12),
   characterized in that
   the axis of rotation (Z) of the cylinder core (12) is offset in parallel with respect to the longitudinal axis (S) of the lock body (10), namely away from the fastening point for the first end (16) of the loop (14).
2. A loop lock in accordance with claim 1,
   characterized in that
   an axial prolongation (28) of the cylinder housing (12) serves as a block receiver (50) for the second end (18) of the loop (14), with the axis of the block receiver (50) coinciding with the longitudinal axis (S) of the lock body (10).
3. A loop lock in accordance with claim 2,
   characterized in that
   an inner sleeve (22), which can be actuated by the cylinder core (20) and which has a plurality of locking element receivers (24) distributed over its periphery, is rotatably received in the axial prolongation (28), in particular at its inner surface.
4. A loop lock in accordance with claim 3,
   characterized in that
   the axial prolongation (28) has a plurality of escape openings (26) associated with the locking element receivers (24).
5. A loop lock in accordance with claim 4,
   characterized in that
   locking elements (32) are arranged in the locking element receivers (24), said locking elements engaging into a peripheral groove (30) of a block (18) received in the block receiver (50) in dependence on a rotary position of the inner sleeve (22) relative to the axial prolongation (28) in a closed position and engaging into the escape openings (26) for a release of the block (18) in the release position.
6. A loop lock in accordance with claim 5,
   characterized in that
   the escape openings (26) have cam surfaces (34) which extend obliquely to the inner surface of the axial prolongation (28), which in particular have cam surfaces (34) inclined in the direction of rotation of the inner sleeve (22) and which are configured to control the locking elements (32) between the closed position and the release position.
7. A loop lock in accordance with any one of the claims 4 to 6,
   characterized in that
   the escape openings (26) are axially introduced into the axial prolongation (28).
8. A loop lock in accordance with claim 4 or claim 5,
   characterized in that
   the escape openings (26) are obliquely aligned.
9. A loop lock in accordance with any one of the claims 3 to 8,
   characterized in that
   the cylinder core (20) has a catch pin (36) which cooperates with a cam link provided at the inner sleeve (22), in particular with an elongate hole (38), for the actuation of the inner sleeve (22).
10. A loop lock in accordance with any one of the claims 4 to 9,
    characterized in that
    the lock body (10) peripherally covers the escape openings (26).
11. A loop lock in accordance with any one of the preceding claims,
    characterized in that
    at least one fastening element (44) is provided in the cylinder housing (32) and engages tangentially into a ring groove (42) of a connector piece (16) fastened to the first end (16) of the loop (14).
12. A loop lock in accordance with claim 11,
    characterized in that
    the at least one fastening element comprises two steel pins (44) inserted into the cylinder housing (12) in parallel to one another as well as parallel to the longitudinal axis (S) of the lock body (10).

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