WO2012100950A1

WO2012100950A1 - Padlock

Info

Publication number: WO2012100950A1
Application number: PCT/EP2012/000359
Authority: WO
Inventors: Bernhard Garthe
Original assignee: ABUS August Bremicker Söhne KG
Priority date: 2011-01-27
Filing date: 2012-01-26
Publication date: 2012-08-02
Also published as: CN103348071A; ES2717658T3; CA2824848A1; AU2012210778B2; EP2668354A1; AU2012210778A1; BR112013019096B1; CN103348071B; DE102011009591A1; EP2668354B1; BR112013019096A2; CA2824848C; DK2668354T3

Abstract

A padlock comprises a lock housing, a U-shaped shackle and a cylinder in order to selectively lock the shackle on the lock housing, wherein the cylinder has a cylinder axis and is secured on the lock housing by means of a securing element. The securing element is mounted on the cylinder so as to be displaceable and spring back transversely to the cylinder axis, wherein the securing element engages with a securing opening on an inner face of the lock housing in order to secure the cylinder on the lock housing.

Description

HANG CASTLE

The invention relates to a padlock with a lock housing, a U-shaped lock bracket and a lock cylinder to selectively lock the lock bracket to the lock housing, wherein the lock cylinder has a cylinder axis and is secured by a securing element to the lock housing. In such a padlock the lock bracket is held displaceable on the lock housing. In an open position of the lock strap, a free end of the lock strap can be guided, for example, by an eyelet of an object. In a closed position, both ends of the lock bracket are connected to the lock housing. In this closed position, the lock bracket can be locked by means of the lock cylinder via a locking device on the lock housing. For this purpose, the lock cylinder typically has a cylinder housing and a cylinder core, which is rotatably mounted in the cylinder housing with respect to said cylinder axis and can be actuated by means of an associated key. Said locking means may comprise, for example, a rotary latch which is rotatably coupled to the rotatable cylinder core, and two blocking balls which engage in response to the rotational position of the rotary latch in locking recesses of the lock bracket or can withdraw from these.

The lock cylinder forms a separate unit, which is secured to the lock housing by means of a securing element. For this purpose, it is known from US Pat. No. 6,425,274 B1 to use a locking screw which is parallel to the cylinder axis by means of a strap retainer. mekanal of the lock housing is inserted and screwed to a web portion of the cylinder housing. A disadvantage of this solution is that for securing the lock cylinder on the lock housing, the locking screw at the end of a strap receiving channel find only in the associated threaded hole and then must be rotated by means of a tool.

It is an object of the invention to provide a padlock of the type mentioned, in which the lock cylinder can be attached to the lock housing in a simple manner. In particular, a releasable attachment of the lock cylinder to the lock housing should be possible, and the padlock should be made in a compact size.

This object is achieved by a padlock with the features of claim 1, and in particular by the fact that the fuse element is displaceably mounted on the lock cylinder and resiliently mounted transversely to the cylinder axis, wherein the securing element engages in a securing opening on an inner side of the lock housing To secure the lock cylinder on the lock housing.

The securing element is thus not inserted parallel to the cylinder axis in the lock cylinder, but the securing element is movable transversely to the cylinder axis, in particular exactly perpendicular to the cylinder axis. In this case, the securing element is spring-mounted on the closing cylinder, ie the securing element is biased (for example by means of a compression spring) in the direction of a securing position in which the securing element cooperates with a securing opening which is formed in the interior of the lock housing. By such an arrangement, the lock cylinder is automatically secured to the lock housing when the lock cylinder is inserted into the lock housing becomes. The attachment of the lock cylinder to the lock housing can thus be carried out in a particularly comfortable and reliable manner, in particular without the need for using a tool. A particular advantage of the securing element movable transversely to the cylinder axis is that, despite the separate design of the lock cylinder (in particular releasably secured to the lock housing, see below), a compact design of the padlock can be achieved, for example with a width of the lock housing of, for example at most 35 mm. In particular, it is not necessary that the lock cylinder is arranged in alignment with the respective strap receiving channel of the lock housing, so that a locking screw can be screwed into the lock cylinder through the respective strap receiving channel, as is known from the aforementioned patent US 6,425,274 B1. In addition, the lock strap and the respective strap receiving channel of the lock housing may have a small diameter, since it is not necessary to adapt the diameter of the respective strap receiving channel to the size of a locking screw according to US Pat. No. 6,425,274 B1. However, such a securing screw must have a certain minimum size in order to ensure sufficient stability of the fastening of the lock cylinder to the lock housing.

According to an advantageous embodiment, the lock housing has a receiving opening for the lock cylinder, which is preferably provided on the underside of the lock housing. While the securing element is initially pushed back into the lock cylinder, the lock cylinder along the cylinder axis can be inserted into the receiving opening of the lock housing in such a way that the securing element snaps into the securing opening when an end position is reached To secure the lock cylinder in the end position on the lock housing. This results in a particularly simple and secure attachment of the lock cylinder to the lock housing. The securing element is preferably arranged on a web section of a cylinder housing of the lock cylinder, this web section also containing the tumblers of the lock cylinder (eg pin tumblers). Preferably, the securing element is formed independently of the tumblers of the lock cylinder and does not extend into the cylinder core of the lock cylinder.

Furthermore, it is preferred if the lock cylinder has a key insertion opening, wherein the securing element is arranged at an end of the lock cylinder (or the mentioned web section) facing away from the key insertion opening. In particular, the lock cylinder may include a plurality of tumblers (e.g., pin tumblers), the lock member being located behind the last tumbler with respect to the key insertion direction. At this point, the securing element is particularly well protected against manipulation in order to prevent unauthorized removal of the lock cylinder from the lock housing.

According to an advantageous embodiment, the securing element is formed by a securing pin which is biased by means of a compression spring in the direction of a securing position. Alternatively, however, the fuse element may, for example, also be integrally formed as a safety spring, which is biased by its inherent elasticity in the direction of the securing position.

Particularly convenient is the fastening of the lock cylinder to the lock housing when the securing element to the lock cylinder Captive captivated. For this purpose, it is preferred if the securing element is displaceably mounted in a receiving recess of the lock cylinder (in particular of said web portion of the cylinder housing), wherein the securing element has a stop portion which cooperates with a stop portion of the lock cylinder to prevent escape of the securing element from the receiving recess , In this way, it is thus avoided that the spring element mounted in a spring-loaded manner unintentionally falls out of the receiving recess or is forced out before the lock cylinder is inserted into the lock housing.

Said abutment portion of the securing element is preferably formed by an increase in diameter of the securing element, wherein the abutment portion of the locking cylinder is formed by a corresponding reduction in diameter of a peripheral boundary of said receiving recess. This can be achieved, for example, in that the reduction in diameter is formed by a stop ring inserted into the receiving recess of the lock cylinder.

For some applications, it is desirable that the lock cylinder is releasably secured to the lock housing in order to subsequently replace the lock cylinder or to be able to subsequently change the locking secret of the lock cylinder. This makes it possible that the manufacturer of the padlock prefabrication takes place, with a locksmith prior to delivery of the padlock to the final user still performs a customization (for example, by combining a particular color of the lock housing with a specific Closing secret). Thus, it can also be achieved that the user has a low More number of different keys must lead, as explained in the aforementioned patent US 6,425,274 Bl.

For such a releasable attachment of the lock cylinder to the

Lock housing, it is preferred if the lock housing has two strap receiving channels for receiving a respective leg of the lock bracket, wherein said securing opening for the securing element on the inside of the lock housing is accessible via one of the two strap receiving channels and in particular formed by a part of one of the two strap receiving channels. The respective strap receiving channel is closed by means of the associated stirrup leg when the lock strap is locked to the lock housing. In the closed position of the lock bracket, the securing element is thus not accessible. However, when the lock bracket is unlocked, i. when the lock cylinder is brought by means of the associated key in the release position, the bar arm can be removed from the respective bail receiving channel, so that in this way the securing opening and the securing element are accessible. The securing element can now be pushed back into a release position to selectively remove the lock cylinder from the lock housing. Here, a particular advantage is that despite the releasable securing of the lock cylinder on the lock housing, a compact design of the padlock is made possible, as explained above.

In order to facilitate the attachment of a tool for pushing back the securing element, the securing element can have an actuating bevel, in particular at its free end. Such Betätigungsabschrägung can be formed for example by a circumferential chamfer. Said receiving recess of the lock cylinder for the securing element may be a blind hole, ie the prestressed securing element or a compression spring associated with the securing element is supported on a bottom of the receiving recess.

Alternatively, a continuous receiving channel for the securing element in the lock cylinder (in particular in the web portion of a cylinder housing) is provided, the following advantage being achieved: In some lock cylinders it is desirable or necessary that a possible rotational movement of the cylinder core relative to the cylinder housing is limited , This can be achieved in a simple manner in that the securing element is mounted displaceably in the cylinder housing and biased radially outwardly with respect to the cylinder axis by a compression spring, wherein the compression spring is supported on a rotation stop element, which is also mounted displaceably in the cylinder housing and by means of Compression spring is biased radially inwardly with respect to the cylinder axis. This rotation stop element engages in a recess of the cylinder core, which extends with respect to the cylinder axis along a limited circumferential angle. By this engagement, the rotational movement of the cylinder core is limited relative to the cylinder housing. Unlike in the aforementioned patent US Pat. No. 6,425,274 B1, therefore, a circumferentially limited engagement recess is provided on the part of the rotatable cylinder core, wherein the rotation stop element engaging in this recess is provided in a receiving channel on the part of the cylinder housing, which is required anyway for said securing element.

According to a further advantageous embodiment, the lock housing is made in one piece and made of plastic. By using a Lock housing made of plastic, the padlock is suitable as a so-called "lock-out" lock for securing a switch an industrial plant, as described for example in the patent US 7 278 283 B2. Such a "lock-out" lock prevents inadvertent activation of the industrial plant while a maintenance person at the plant is performing work and blocking a switch associated with the industrial plant during this period by means of the padlock in an OFF position. Since in the padlock invention, the lock cylinder can be inserted straight into the lock housing until the fuse element automatically snaps into the fuse opening of the lock housing, unlike the two-piece design according to the patent US 7 278 283 B2, the lock housing be integrally formed, causing the Production of the

Lock housing cheapened.

A one-piece design of the lock housing also contributes to a compact design. A compact design of the padlock is particularly advantageous for use as a "lock-out" lock, since often several "lock-out" locks are attached in close proximity to each other on a cabinet or fuse box, such as in the patent US 7,148 435 B2 and in the patent

US 6,388,213 B l is shown.

The invention will now be described by way of example only with reference to the drawings. Identical or similar elements are identified therein with the same reference numerals.

Fig. 1 shows a longitudinal sectional view of a first embodiment of a padlock. FIG. 2 shows a detailed view of FIG. 1.

Fig. 3 shows a longitudinal sectional view of a second embodiment of a padlock.

4 shows a detail view of FIG. 3.

Figs. 5 and 6 show a respective exploded view of the second

Embodiment according to FIGS. 3 and 4.

The padlock shown in Fig. 1 has a lock housing 11 and a U-shaped lock bracket 13 which is held on the lock housing 11 displaceable in a straight line. The lock bracket 13 has two bar arms 15, which are received in a respective strap receiving channel 17 of the lock housing 11.

The padlock further comprises a lock cylinder 19 which locks the lock bracket 13 selectively on the lock housing via a locking device 21. The lock cylinder 19 has a cylinder housing 23 with a hollow cylindrical core receiving portion 25, in which a cylinder core 27 is rotatably mounted about a cylinder axis A. The cylinder housing 23 further has an eccentric land portion 29 formed on the core receiving portion 25. In the land portion 29 and in the core receiving portion 25, a plurality of pin tumblers 31 are arranged to cooperate with a key 33 inserted into the cylinder core 27.

The locking device 21 comprises a rotary latch 35 which is rotatably coupled to the Zylinderkem 27, and two blocking balls 37, the by means of the rotary latch 35 selectively in a respective Verriegelungsvertie- 39 tion of the two bracket legs 15 are urged.

At the web portion 29 of the cylinder housing 23, with respect to the Einfühirichtung of the key 33 behind the pin tumblers 31, a securing element 41 is provided which secures the lock cylinder 19 on the lock housing 1 1. For this purpose, the securing element 41 is biased by a compression spring 43 in the direction of the securing position shown in Fig. 1, with respect to the cylinder axis A radially outward. In this securing position, the securing element 41 engages in a securing opening 45, which is formed on the inside of the lock housing 11 and forms an axial extension of one of the two strap receiving channels 17, i. the securing opening 45 opens into the respective strap receiving channel 17th

Fig. 2 shows the fuse element 41 and its surroundings in a detailed view. It can be seen that the securing element 41 engages behind a stepped portion 47 of the lock housing 11. The securing element 41 is displaceably mounted in a receiving recess 49 of the cylinder housing 23. The securing element 41 is pin-shaped and has an axially effective stop section in the form of an increase in diameter 51. The increase in diameter 51 cooperates with a stop ring 53 which is inserted into the receiving recess 49. This prevents the securing element from inadvertently escaping from the receiving recess 49 in spite of the prestressing force applied by the compression spring 43. FIG. 2 further shows that the tip of the securing element 41 has a peripheral actuating bevel 55. By the transverse to the cylinder axis A spring-back, ie biased in the direction of the securing position securing element 41 of the

Lock cylinder 19 are attached to the lock housing 1 1 in a simple and reliable manner. For this purpose, the lock cylinder 19 is inserted along the cylinder axis A in the lock housing 11 until reaching the end position shown in Fig. 1, wherein the securing element 41 snaps into the securing opening 45 to secure the lock cylinder 19 to the lock housing 11. This type of attachment requires no tools.

In principle, a separate, closed securing opening 45 could be provided for the securing element 41. However, since in the embodiment of FIG. 1, the securing opening 45 opens into the associated bracket receiving channel 17, the securing element 41 is accessible when the lock bracket 13 in the unlocked state of

Locking cylinder 19 is brought into its open position, in which the respective bar arm 15 is removed from the hanger receiving channel 17. The securing element 41 can then be completely pushed back into the receiving recess 49 with the aid of a tool, in order to allow the authorized user, for example, to change the locking secret, to remove the lock cylinder 19. The actuating bevel 55 at the tip of the securing element 41 facilitates a corresponding engagement with the securing element 41.

It should be emphasized that the padlock shown can be made in a compact design (Fig. 1 is an enlarged view). In particular, the lock housing 11 may have a small width, since the web portion 29 of the cylinder housing 23 may have a small depth and it is not necessary that the web portion 29 is arranged completely in alignment with the respective strap receiving channel 17 of the lock housing 11, ie, the web portion 29 of the cylinder housing 23 extends only partially into the axial extension of the respective strap receiving channel 17 into it. The minimum width of the lock housing 11 is thus determined solely by the minimum dimensions of the lock cylinder 19 (diameter of the cylinder core 17, minimum depth of the web portion 29 for the Stiftzuhaltungen 31) and the minimum wall thickness in the lateral vicinity of the lock cylinder 19. In addition, the lock bracket 13 and the respective strap receiving channel 17 of the lock housing 11 may have a small diameter, since no loose securing element having a predetermined minimum size (in particular a locking screw) must be inserted through the relevant strap receiving channel 17 into the lock housing 11.

In the embodiment according to Figures 1 and 2, the receiving recess 49 for the securing element 41 is formed as a blind hole, the compression spring 43 being formed at the bottom of the blind hole, i. is supported on the cylinder housing 23.

In contrast, FIGS. 3 to 6 show an alternative embodiment in which the compression spring 43 is supported on a rotation stop element 61. The rotation stop member 61 is also displaceably mounted in the receiving recess 49, wherein the rotation stop member 61 is biased radially inwardly with respect to the cylinder axis A and wherein the receiving recess 49 is formed as a continuous bore. The rotation stopper 61 engages in an engagement recess 63 which is formed on the outer circumferential surface of the cylinder core 27 and serves as a guide groove for the rotation stopper 61. The engagement recess 63 extends along the cylinder axis A along a limited Circumferential angle (see Fig. 6). In this way, a rotational stop is formed for the rotational movement of the cylinder core 27 relative to the cylinder housing 23, similar to what is known from the aforementioned patent US 6,425,274 Bl (but in the reverse arrangement).

Also, the rotation stopper 61 is pin-shaped and has an axially effective stop portion in the form of an increase in diameter 65, which cooperates with a stop portion of the cylinder housing 23 in the form of a constriction 67 to prevent inadvertent escape of the rotation stop member 61 from the receiving recess 49.

Due to the spring-back mounting of the rotation stop element 61, the illustrated rotation stop can even be selectively overcome in order to be able to reposition the lock cylinder 19, as is also known from US Pat. No. 6,425,274 B1. This is accomplished by the actuating opening 69 (Figure 5), through which a tool can be inserted to engage the tip of the rotation stop member 61 and push it back out of the engagement recess 63 (Figure 4). The cylinder core 27 can then be brought into a rotational position in which the pin tumblers 31 can be exchanged.

The lock housing 1 1 of the padlock shown in Fig. 1 to 6 may be formed of plastic, whereby the padlock is particularly well suited as a "lock-out" lock. LIST OF REFERENCE NUMBERS

11 lock housing

13 lock hanger

15 stirrup legs

17 Strap receiving channel

19 lock cylinder

21 locking device

23 cylinder housing

25 core receiving section

27 cylinder core

29 bridge section

31 pin tumbler

33 keys

35 rotary bolt

37 blocking ball

39 locking recess

41 fuse element

43 compression spring

45 securing opening

47 step section

49 Recording recess

51 Diameter magnification

53 stop ring

55 operating bevel

61 Rotation stop element

63 intervention recess

65 diameter increase

67 constriction

69 actuation opening Śylinderachse

Claims

claims

A padlock with a lock housing (11), a U-shaped lock bracket (13) and a lock cylinder (19) to selectively lock the lock bracket to the lock housing, wherein the lock cylinder (19) has a cylinder axis (A) and by means of a securing element ( 41) is secured to the lock housing (11), characterized

that the securing element (41) on the lock cylinder (19) displaceable and transverse to the cylinder axis (A) is mounted resiliently, wherein the securing element (41) in a securing opening (45) on an inner side of the lock housing (11) engages to the

Lock cylinder to secure the lock housing.

Padlock according to claim 1, wherein the lock housing (11) has a receiving opening for the lock cylinder (19), wherein the lock cylinder along the cylinder axis (A) in such a way in the receiving opening is inserted, that upon reaching an end position, the securing element (41) in the securing opening (45) snaps in order to secure the lock cylinder in the end position on the lock housing.

A paddle lock according to claim 1 or 2, wherein the lock cylinder (19) comprises a cylinder housing (23) and a cylinder core (27) which is rotatably mounted in a core receiving portion (25) of the cylinder housing (23), the cylinder housing having a web portion (29). has, on which the securing element (41) is mounted.

4. padlock according to one of the preceding claims, wherein the lock cylinder (19) has a Schlüsseleinführöffnung, wherein the securing element (41) on one of the key insertion opening facing away from the end of the lock cylinder (19) is arranged.

5. padlock according to one of the preceding claims, wherein the securing element (41) with respect to the cylinder axis (A) is biased radially outward.

6. padlock according to one of the preceding claims, wherein the securing element (41) is formed by a locking pin which is biased by a compression spring (43) in the direction of a securing position.

7. padlock according to one of the preceding claims, wherein the securing element (41) in a receiving recess (49) of the lock cylinder (19) is displaceably mounted, and wherein the securing element has a stop portion which cooperates with a stop portion of the lock cylinder to escape the To prevent securing element from the receiving recess.

8. A padlock according to claim 7, wherein the stopper portion of the securing member (41) by an increase in diameter (51) is formed, and wherein the stopper portion of the lock cylinder (19) by a reduction in diameter of a circumferential boundary of the receiving recess (49) is formed.

9. padlock according to one of the preceding claims, wherein the reduction in diameter is formed by a stop ring (53) inserted into the receiving recess.

10. padlock according to one of the preceding claims, wherein the lock housing (1 1) has two strap receiving channels (17) for receiving a respective leg (15) of the lock bracket (13), wherein the securing opening (45) for the securing element (41) via a the strap receiving channels (17) is accessible.

11. A padlock according to one of the preceding claims, wherein the securing element (41) has a Betätigungsabschrägung (55) to selectively push back the securing element in the lock cylinder (19) can.

12. A padlock according to one of the preceding claims, wherein the lock cylinder (19) has a cylinder housing (23) and a cylinder core (27) which is rotatably mounted in the cylinder housing, wherein the securing element (41) mounted displaceably in the cylinder housing and by means of a Compression spring (43) with respect to the cylinder axis (A) is biased radially outward, wherein the compression spring (43) on a rotation stop member (61) is supported, which also displaceably mounted in the cylinder housing (23) and by means of the compression spring (43) with respect to Cylinder axis (A) is biased radially inward, wherein the rotation stopper member (61) in a recess (63) of the cylinder core (27) engages to limit a rotational movement of the cylinder core relative to the cylinder housing.

13. padlock according to one of the preceding claims, wherein the lock housing (11) is formed in one piece and made of plastic.