Container locking device

Abstract

A container locking device is described, which comprises a housing (10) and a locking pin (20) which is movable in an axial direction (Z) and in a peripheral direction with respect to the housing (10), which locking pin (20) has a shaft (21) which is at least partially accommodated by the housing (10) and which has a mushroom head (23) for engaging in a container corner fitting, which mushroom head (23) is integrally formed on an upper end (22) of the shaft (21), wherein the locking pin (20) is movable between a plurality of positions in which the locking pin (20) extends to different extents with respect to the housing (10) by means of a guide contour (30) and at least one guide pin (31a, 31b) which engages in the guide contour (30). It is therefore an object of the invention to develop a container locking device which can be controlled more precisely between a receiving / unloading readiness state and a locking readiness state. It is an object that the guide contour (30) is formed such that the guide contour extends continuously at the periphery in the peripheral direction with respect to the shaft (21).

Description

Technical Field

[0001] The present invention relates to a container locking device with the features described in the preamble of claim 1. Background Technology

[0002] Container locking devices are typically mounted on the chassis of vehicles such as semi-trailers, trucks, or freight trains, and are used to releasably attach the mounted containers to the vehicle's chassis. Each container has a so-called container corner fitting on its underside, which serves both as a support for mounting the container and as a means of engaging the locking pin.

[0003] DE 202009016268 U1 describes a locking device for a container known from the prior art. The locking device includes a housing and a locking pin that can rotate and lower approximately 90° about a vertical axis via a helical guide. The locking pin mechanism uses a pressure plate that shifts due to the weight of the container, thereby initiating the rotational and lowering movement of the locking pin. However, a drawback has been found: after unloading the container, the pressure spring, especially if it is covered with dirt and grease, no longer reliably opens, and there is a risk that lifting the container will also lift the vehicle beneath it.

[0004] Document DE 102007007067 A1 also discloses a device for locking a container with a rotatable and retractable locking element by transferring the weight force of the container to a cam, depending on the presence of the unloading container. However, the device cannot reliably release the locking element from engagement with the container's corner fittings when the container is unloaded. Summary of the Invention

[0005] Therefore, the object of the present invention is to develop a container locking device that can more precisely control the state between receiving / unloading preparation and locking preparation.

[0006] This objective is achieved according to the invention using the features of claim 1. To detachably connect the container to the housing and thereby to the vehicle chassis, the locking pin performs movement in its axial and circumferential directions from a fully lowered and / or ready-to-pick-up position and / or a clamped position. The container is substantially locked in the clamped position of the locking pin, and thus spatially fixed in position relative to the housing.

[0007] The guide profile should be understood as a recessed groove, specifically relative to the surface of the shaft. Similarly, the guide profile can also be a raised area of ​​material on the surface of the shaft. In any case, the guide profile extends circumferentially around the locking pin as a closed profile. At least one guide pin always operatively engages with the guide profile and follows the guide profile in one direction of rotation of the locking pin.

[0008] Since the locking pin cannot rotate backward, it must always rotate in one direction. Therefore, the guide groove must be circumferential to allow the locking pin to return to its initial position.

[0009] The container locking device is preferably attached to the chassis or support structure of the container vehicle by means of a housing.

[0010] Advantageously, the circumferential topography of the guide profile changes direction alternately between upper and lower profile points, with each upper profile point located at the minimum axial distance from the mushroom head and each lower profile point located at the maximum axial distance from the mushroom head. The guide profile follows a circumferential zigzag path around the locking pin.

[0011] All upper contour points can have the same minimum axial distance, and all lower contour points can have the same maximum axial distance to the mushroom head. The minimum axial distance is always less than the maximum axial distance.

[0012] According to a particularly preferred embodiment, the upper and lower contour points are equidistant from each other in the circumferential direction, with the upper contour point offset from the lower contour point by half a distance. This results in a uniform and symmetrical distribution of the upper and lower contour points, which in turn gives equal-length guide contour segments with alternating directions between the upper and lower contour points. This, in particular, results in a constant rotational movement of the locking pin.

[0013] Advantageously, an axially extending profile extension is formed from each upper profile point. When the at least one guide pin moves within the profile extension, this always results in the downward or upward movement of the locking pin, for example, to prepare for container reception or removal, or to clamp the container using the locking pin.

[0014] Preferably, the contour extensions are alternately formed as short and long contour extensions in the direction of the mushroom head. The short contour extensions are sufficient to clamp the container against the housing using locking pins. The short contour extensions are sufficient for this purpose because the clamping process is already accomplished by the container corner fittings on the housing, and the contour extensions do not need to be longer. In the position ready to receive or remove the container, the at least one guide pin is located within the long contour extension.

[0015] According to a first advantageous embodiment, the guide profile is formed directly on the shaft of the locking pin, and the at least one guide pin is fixedly mounted to the housing. The fixed mounting of the guide pin refers to a rotational fixed mounting relative to the locking pin in the circumferential direction and a fixed mounting in the axial direction of the locking pin. In particular, the at least one guide pin may be mounted in an intermediate housing layer located between the top and bottom walls of the housing. The guide profile may, for example, be milled into the shaft of the locking pin.

[0016] According to a second alternative embodiment, a guide profile is formed in a guide tube concentrically surrounding the shaft of the locking pin, and the at least one guide pin is fixedly mounted in the shaft of the locking pin. The guide pin fixedly mounted in the shaft of the locking pin is understood as a rotationally fixed support relative to the locking pin in the circumferential direction and a fixed support in the axial direction of the locking pin.

[0017] Advantageously, the at least one guide pin is spring-loaded in its axial extension direction, regardless of the embodiments described above. This ensures permanent engagement of the at least one guide pin with the guide profile, particularly when interaction with a stop (described later) is required, which may necessitate axial forward and backward movement of the at least one guide pin.

[0018] The at least one guide pin should be radially aligned with the locking pin, regardless of whether the at least one guide pin is fixed to the housing or directly attached to the locking pin.

[0019] It is particularly advantageous if the locking pin interacts with the stop such that the locking pin moves only in a predetermined rotational direction. The stop preferably includes a shoulder formed in the guide profile, through which the at least one guide pin may traverse in one direction. The shoulder may have a sharp edge on its inlet side for the at least one guide pin and gradually taper to the original level of the guide profile on its outlet side.

[0020] Reverse rotation of the locking pin is prevented by the fact that at least one guide pin cannot pass over the sharp edge of the shoulder and therefore follows a different path of the guide profile.

[0021] As an alternative to the above embodiments, the stop may include one or more shoulders arranged in the shaft. These shoulders engage spring-loaded claws in a predetermined rotational direction and are held by the claws in the opposite direction.

[0022] These shoulders also have sharp edges on their inlet side for claws, and gradually taper to the original level of the shaft on their outlet side.

[0023] Advantageously, the locking pin is driven by a reverse drive unit for the axial travel path. The reverse drive unit is understood to be a drive unit that can switch between forward and reverse rotation directions. The reverse drive unit is a drive motor or includes a drive motor. The rotation direction is typically reversed each time the at least one guide pin reaches one of the lower contour points or the distal end of one contour extension. Suitable sensors can be provided to detect whether the at least one guide pin has reached the lower contour point or the distal end of the contour extension. Alternatively, the increased current consumption of the drive motor at these points can also be measured and used as a switching signal for the reverse drive unit.

[0024] Advantageously, the shaft of the locking pin is formed with an external thread that engages with the internal thread of a gear arranged on the shaft.

[0025] The rotational motion of the drive unit is transmitted to the movement of the locking pin along the guide profile via a gear running on the shaft. The gear travels on the external thread of the locking pin, continuously changing its position relative to the housing.

[0026] Preferably, the external thread and the guide profile are arranged to overlap in the axial direction of the shaft. This means that the guide profile extends through the external thread. The thread of the external thread is interrupted in segments by the guide profile.

[0027] Alternatively, the gear can be fixed axially relative to the housing and driven by a pinion of the drive unit. The pinion is advantageously mounted to the output shaft of the drive unit to prevent rotation.

[0028] Specifically, the locking pin is surrounded by a guide sleeve between the mushroom-shaped head and the guide profile. When the locking pin is fully retracted, the guide sleeve moves into the housing along with it. In the ready-to-receive or unload position of the container locking device, the guide sleeve protrudes segmentally from the housing and holds the horizontal forces caused by the loading or unloading process away from the locking pin. It has proven particularly advantageous if, starting from the lowered position of the locking pin, the guide sleeve is kept rotationally fixed by guide walls integrally formed into the housing and axially guided by these guide walls along a predetermined axial travel path.

[0029] Advantageously, the guide sleeve is provided with at least one latch, which is movable in the radial direction along the locking pin. In the lowered position of the locking pin, the latch engages in a recess of the locking pin, thereby securing the guide sleeve at least axially to the locking pin. This allows the locking pin to initially extend out of the housing together with the guide sleeve.

[0030] According to a particularly advantageous embodiment, the at least one latch is supported on an associated guide wall in the lowered position of the locking pin. The guide wall is an integral part of the housing and provides support to prevent rotation of the guide sleeve.

[0031] In the partially extended position of the locking pin, the guide sleeve and the locking pin can extend together out of the housing until the guide sleeve disengages from the guide wall and is axially supported on the housing by a collar projecting radially from the guide sleeve. Thus, the protruding collar restricts the axial travel of the guide sleeve away from the housing. When the protruding collar contacts the housing, particularly the interior of the top wall of the housing, only the locking pin changes its axial position relative to the housing.

[0032] Preferably, in the partially extended position, at least one latch is pressed into the recess of the locking pin by means of a spring element.

[0033] The spring preload acting on the at least one bolt is exceeded only when the locking pin is extended axially, causing the latch to lock in the axial direction of the locking pin and slide out of the recess along the shaft, particularly on the external thread formed on the shaft. Thus, in the fully extended position of the locking pin, the at least one latch is spring-loaded on the shaft of the locking pin. Attached Figure Description

[0034] To better understand, the invention is explained in more detail below with reference to 10 accompanying drawings.

[0035] Figure 1 A perspective section through the container locking device with a fully lowered locking pin according to the first embodiment;

[0036] Figure 2 : Figure 1 A perspective view of the locking pin of the container locking device shown;

[0037] Figure 3 Perspective view of the enlarged portion of the guide outline of the locking pin;

[0038] Figure 4 : Perspective top view of the guide sleeve of the container locking device;

[0039] Figure 5 :according to Figure 4 A perspective bottom view of the guide sleeve;

[0040] Figure 6 A perspective section passing through a container locking device with a slightly protruding locking pin according to the first embodiment;

[0041] Figure 7 A perspective section passing through the container locking device according to the first embodiment between the ready-to-receive and clamping positions;

[0042] Figure 8 : A perspective section passing through the container locking device according to the first embodiment immediately before reaching the clamping position;

[0043] Figure 9 : A perspective side view of the container locking device at the location where photos are to be taken and removed, according to the second embodiment; and

[0044] Figure 10 : An enlarged cross-section of the upper end of the guide sleeve and locking pin of the container locking device in the position ready for receiving and removal according to the second embodiment. Detailed Implementation

[0045] Figure 1A perspective section is shown through a container locking device having a housing 10 and a locking pin 20 in the fully lowered position, the locking pin 20 being movably mounted relative to the housing 10. The housing 10 has a top wall 12 and a generally parallel bottom wall 13 spaced apart from the top wall 12, wherein the top wall 12 and the bottom wall 13 are connected to each other by generally vertical side walls 14.

[0046] The locking pin 20 includes a shaft 21, the upper end of which is integrally incorporated into a mushroom head 23. The mushroom head 23 has a convex upper surface and a flat lower surface. The lower surface is substantially orthogonal to the shaft 21. With the container in place, the mushroom head 23 is inserted into a corner fitting (not shown) of the container. By rotating the locking pin 20 downwards, the corner fitting is then clamped in the direction of the housing 10. An external thread 25 is provided at one free end of the shaft 21.

[0047] An upper through-opening 15 is formed in the top wall 12 of the housing, and this upper through-opening 15 is sized such that the mushroom head 23 of the locking pin 20 can be fully lowered into the housing 10. In this lowered position of the locking pin 20, the lower free end of the shaft 21 protrudes from the housing 10 through the lower housing through-opening 16 along with the external thread 25. The lower housing through-opening 16 is closed at the bottom by a cup-shaped cap 17. The fully lowered position of the locking pin 20 within the housing 10 allows the container locking device to be removed when not in use, for example, to accommodate different container sizes.

[0048] The locking pin 20 is actuated by the guide profile 30 and the drive unit 50. The guide profile 30 is formed on the shaft 21, and two opposite guide pins 31a and 31b engage in the guide profile 30 under spring tension. The guide profile 30 is specifically recessed into the shaft 21.

[0049] Guide pins 31a and 31b are arranged radially on opposite sides of shaft 21 and are spring-loaded in the intermediate housing base 18. The intermediate housing base 18 is fixedly attached to housing 10, particularly to the upright housing sidewall 14. Regardless of the position of locking pin 20, guide pins 31a and 31b are always in contact with guide profile 30.

[0050] Drive unit 50 transmits torque to gear 26 via its pinion 51, gear 26 running on external thread 25 formed on shaft 21. External thread 25 overlaps with guide profile 30 in the axial direction Z of shaft 21. Guide profile 30 extends through external thread 25 of shaft 21. Depending on the rotation direction of pinion 51 and gear 26, the shaft 21 of locking pin 20 moves upward toward the top wall 12 of housing or downward toward the bottom wall 13 of housing. The movement of locking pin 20 in the circumferential direction and in the axial direction Z follows the position of guide pins 31a, 31b within guide profile 30.

[0051] Guide contour 30 in Figure 2 , Figure 3 The shaft 21, which is particularly well shown and completely surrounds the locking pin 20 circumferentially, is particularly well shown. The guide profile 30 is designed such that the locking pin 20 always changes its rotational and axial positions in a predetermined circumferential direction, regardless of the rotational direction of the drive unit 50.

[0052] When the rotation direction of the drive unit 50 is reversed, the locking pin cannot change its rotation direction either.

[0053] The guide profile 30 is symmetrically designed for two opposite guide pins 31a and 31b, such that the guide pin 31b is located in a similarly shaped portion of the guide profile 30 opposite to that of the guide pin 31a.

[0054] The guide contour 30 extends alternately between the upper contour point 32 and the lower contour point 33 in a zigzag pattern. The upper contour point 32 has a minimum axial distance Z in the axial direction Z of axis 21 up to the mushroom head 23. min Furthermore, the lower contour point 33 has the maximum axial distance Z. max Maximum axial distance Z max Always greater than the minimum axial distance Z min .

[0055] In the circumferential direction, the upper contour points 32 are preferably spaced apart from each other by a constant distance A. The lower contour points 33 are spaced apart from each other by the same distance A in the circumferential direction. Ideally, the lower contour points 33 are offset from the upper contour points 32 by half the circumferential distance A.

[0056] Only after the upper contour point 32 are contour extensions 34 and 35 aligned along the axial direction Z. These contour extensions 34 and 35 are preferably formed with a shorter length as a short contour extension 34 and a longer length as a long contour extension 35. Besides... Figure 2 In addition to the short profile extension 34 shown, a second short profile extension 34 exists on the opposite side of the locking pin 20, which is not visible here. The short profile extensions 34 are oriented at an angle of approximately 180° to each other. Ideally, the long profile extension 35 is arranged to be offset from the short profile extensions 34 by approximately 90° (see [reference]). Figure 1 ).

[0057] In the ready-to-load or unload position of the locking pin 20, where the locking pin 20 partially protrudes from the housing 10 to provide lateral guidance for the container corner fitting during loading, the guide pins 31a, 31b have migrated into the long profile extension 35. In the clamped position of the locking pin 20 with the container placed on the housing 10, the guide pins 31a, 31b have migrated into the short profile extension 34. The longer type of short profile extension 34 is not necessary because the container corner fitting stops the guide pins 31a, 31b before they reach the distal end of the short profile extension 34 anyway. The short profile extension 34 significantly reduces the risk of operator pinching because when the container is not present, the mushroom head 23 cannot be lowered to the top wall 12 of the housing, and the guide pins 31a, 31b have reached the distal end of the short profile extension 34.

[0058] Once each upper contour point 32 and lower contour point 33 has been traversed by the guide pins 31a and 31b, or the distal end of the short contour extension 34 or the long contour extension 35 has been reached by the guide pins 31a and 31b, the drive unit 50 reverses its rotation direction. To prevent the guide pins 31a and 31b from returning to the previous portion of the guide contour 30 when the drive unit 50 reverses its rotation direction, a stop 40 is provided on the shaft 21.

[0059] In this embodiment, the stop 40 is formed by the shape of the guide profile 30 itself. For this purpose, the stop 40 has a shoulder 41 with a sharp edge at each upper profile point 32 and lower profile point 33, over which the guide pins 31a, 31b pass and engage due to their spring-loaded guidance.

[0060] Due to the stepped design of the shoulder 41, when the locking pin 20 rotates backward, the guide pins 31a and 31b abut against the shoulder 41 in the circumferential direction of the shaft 21, thereby preventing the locking pin 20 from rotating in that direction. Figure 2 In the diagram, the locking pin 20 can only rotate in the direction of rotation D, i.e., clockwise. Starting from each upper contour point 32 and lower contour point 33, the guide contour 30 rises in a ramp manner in the opposite direction of rotation D to the adjacent lower contour point or upper contour point 33, 32, so as to reach a sufficient level at the subsequent lower contour point or upper contour point 33, 32 for the shoulder 41 of the additional steps.

[0061] Locking pin 20 moves from its fully retracted position, as... Figure 1 As shown, it initially moves together with the guide sleeve 60 in its axial direction Z, as... Figure 4 and 5 As shown. The guide sleeve 60 has an opening 64 for the shaft 21 of the locking pin 20, which is centrally located in the main part 65.

[0062] On its lower side, the guide sleeve 60 is surrounded by a generally cylindrical collar 62 that protrudes radially beyond the main portion 65 and rests flat on the upper surface of the intermediate housing base 18 in the fully retracted position of the locking pin 20.

[0063] Two opposing latches 61 are mounted in the collar 62 of the guide sleeve 60 so as to be movable radially toward the opening 64; these latches engage with the recess 28 formed in the shaft 21 from the fully retracted position of the locking pin 20 (see...). Figure 2 In this way, the guide sleeve 60 is detachably connected to the locking pin 20 in the axial direction. In the circumferential direction, the guide sleeve 60 is initially held by two opposing guide walls 11 that are firmly fixed in the housing 10.

[0064] The guide sleeve 60 engages with the corresponding guide wall 11 on three sides, particularly by means of the latch 61.

[0065] Each of the two guide walls 11 is engaged by a spring element 63, the spring element 63 in Figure 6 The middle is particularly visible and its distal end rests on the opposite side of the guide sleeve 60. As long as the two latches 61 are within the guide wall 11, the guide sleeve 60 moves upward or downward together with the locking pin 20.

[0066] During the upward movement of the guide sleeve 60, it is initially blocked by the top wall 12 of the housing. Further upward movement of the locking pin 20 compresses the latch 61 against the force of the spring element 63 on the inclined surface in the recess 28, causing the latch 61 to rest on the guide wall 11. The diameter of the shaft 21, particularly in the region of the external thread 25, prevents the latch 61 from sliding backward, thereby locking the guide sleeve 60 in every degree of freedom. The locking pin 20 can be rotated, closed, and opened without any horizontal force acting on the guide sleeve 60 interfering with its further movement.

[0067] During descent, latch 61 is pressed rearward into recess 28 by spring element 63, causing locking pin 20 to descend forward from that point together with guide sleeve 60.

[0068] Figure 7 A container locking device is shown between the ready-to-receive and clamped positions of the locking pin 20. The guide pins 31a, 31b were previously in the ready-to-receive / remove position of the container in the long profile extension 35, and have now moved within the guide profile 30 via the upper profile point 32 in the direction of the lower profile point 33.

[0069] The guide sleeve 60 rests on the top wall 12 of the housing with its collar 62 and is thus prevented from moving further upward. The main part 65 of the guide sleeve 60 protrudes upward beyond the upper through opening 15 and enters the container corner fitting (not shown here) where it can be located, so that horizontal force is transmitted from the main part 65 to the housing 10 and does not act on the locking pin 20.

[0070] After passing through the location Figure 7 After the lower contour point 33 in the guide contour 30, the two guide pins 31a, 31a move to the upward-facing part of the guide contour 30, as shown. Figure 8 As shown. Figure 8 As shown, the mushroom head 23 rotates almost completely to the position for clamping the container and moves downward together with the entire locking pin 20, as long as the guide pins 31a, 31b have entered the short profile extension 34. This presses the container corner fitting (not shown) against the housing 10. The container locking device is now in the clamped position.

[0071] Figure 9 An alternative embodiment of the container locking device is shown, wherein the guide profile 30 is not formed directly on the shaft 21 of the locking pin 20, but is formed in the guide tube 24 that surrounds the shaft 21 from the outside. On the other hand, the opposite guide pins 31a, 31b are fixedly mounted in the shaft 21 and protrude into the guide profile 30 of the guide tube 24.

[0072] Although a stop 40 in the form of a shoulder 41 is possible, it is difficult to integrate into the interior of the guide tube 24 from a manufacturing point of view.

[0073] Therefore, the stop 40 is implemented at the upper end 22 of the shaft 21 and includes a plurality of circumferentially distributed shoulders 41 formed in the shaft 21, which are covered by the main portion 65 of the guide sleeve 60. On the opposite side of the guide sleeve 60, a spring-loaded pin in the form of a claw 42 is arranged, and the shoulders 41 pass under the spring-loaded pin in the specified direction of rotation. Rotation in the opposite direction of rotation is prevented by holding the claw 42 in the shoulders 41.

[0074] List of reference numerals in the attached figures 10 housing 11 Guide Wall 12 Shell top wall 13. Bottom wall of the shell 14 Shell sidewalls 15 through opening 16 through openings 17 blocks 18. Base of intermediate shell 20 locking pins 21 Locking Pin upper end of 22 axis 23 Mushroom-head locking pin 24 guide tubes 25 external thread, shaft 26 Gears, Shafts 27 Internal threads, gears 28 recesses, locking pins 30 Guided Contour 31a, 31b guide pins 32 upper contour points 33 Lower contour points 34 Short Profile Extension 35 Long Profile Extension 40 stop parts 41 Shoulders 42 Locking Claw 50 drive units 51 small gears 60 guide sleeve 61 latches 62 Guide Sleeve Collar 63 Spring Components 64 openings 65 Main Department The distance between points A in the circumferential direction Rotation direction of D locking pin Axial extension direction of X-guide pin Axial direction of Z-locking pin / shaft Z min Minimum axial distance Z max Maximum axial distance Z s Axial travel of the guide sleeve.

Claims

1. A container locking device comprising a housing (10) and a locking pin (20), the locking pin (20) being movable relative to the housing (10) in an axial direction (Z) and rotatably movable in a peripheral direction, the locking pin (20) having a shaft (21) at least partially received by the housing (10) and having a mushroom head (23) for engaging in a container corner fitting, the mushroom head (23) being integrally formed on an upper end (22) of the shaft (21). in, By means of a guide profile (30) and at least one guide pin (31a, 31b) engaged in the guide profile (30), the locking pin (20) is movable between multiple positions extending to different degrees relative to the housing (10). Its features The guide profile (30) is formed such that the guide profile extends continuously at the periphery in the peripheral direction relative to the axis (21).

2. The apparatus according to claim 1, characterized in that, The guide contour (30) is circumferentially topographically formed by alternating directions between the upper contour point (32) and the lower contour point (33). Each upper contour point (32) is arranged at a minimum axial distance (Z) from the mushroom head (23). min At the location, and each lower contour point (33) is arranged at the maximum axial distance (Z) from the mushroom head (23). max ) place.

3. The apparatus according to claim 2, characterized in that, An axially extending profile extension (34, 35) is formed from each upper profile point (32).

4. The apparatus according to claim 3, characterized in that, The contour extensions (34, 35) are alternately formed as short contour extensions (34) and long contour extensions (35) in the direction of the mushroom head (23).

5. The apparatus according to any one of claims 1 to 4, characterized in that, The guide profile (30) is formed on the shaft (21) of the locking pin (20), and The at least one guide pin (31a, 31b) is fixedly mounted relative to the housing (10).

6. The apparatus according to any one of claims 1 to 4, characterized in that, The guide profile (30) is formed in the guide tube (24), which concentrically surrounds the shaft (21) of the locking pin (20), and The at least one guide pin (31a, 31b) is fixedly mounted in the shaft (21) of the locking pin (20).

7. The apparatus according to claim 5 or 6, characterized in that, The at least one guide pin (31a, 31b) is spring-loaded in its axial extension direction (X).

8. The apparatus according to any one of claims 1 to 7, characterized in that, The at least one guide pin (31a, 31b) is radially aligned relative to the locking pin (20).

9. The apparatus according to any one of claims 1 to 8, characterized in that, The locking pin (20) interacts with the stop (40) so that the locking pin (20) moves only in a predetermined rotational direction.

10. The apparatus according to claim 9, characterized in that, The stop (40) includes a shoulder (41) formed in the guide profile (30), the shoulder (41) being able to pass through in one direction by the at least one guide pin (31a, 31b).

11. The apparatus according to claim 9, characterized in that, The stop (40) includes one or more shoulders (41) arranged in the shaft (21), which engage spring-loaded claws (42) in a predetermined rotational direction and are held by the claws (42) in the opposite rotational direction.

12. The apparatus according to any one of claims 1 to 11, characterized in that, The locking pin (20) is driven by the reverse drive unit (50) for a travel path in the axial direction (Z).

13. The apparatus according to claim 12, characterized in that, The shaft (21) of the locking pin (20) is formed with an external thread (25), which engages with the internal thread (27) of the gear (26) arranged on the shaft (21).

14. The apparatus according to claim 13, characterized in that, The external thread (25) and the guide profile (30) are arranged to overlap in the axial direction (Z) of the shaft (21).

15. The apparatus according to claim 13 or 14, characterized in that, The gear (26) is fixedly held relative to the housing (10) in the axial direction (Z) and is driven by the pinion (51) of the drive unit (50).

16. The apparatus according to any one of claims 1 to 15, characterized in that, The locking pin (20) is surrounded by a guide sleeve (60) between the mushroom head (23) and the guide profile (30).

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