Barrier device for repelling animals, preferably birds, in particular pigeons

Abstract

The invention relates to a barrier device for repelling animals, preferably birds, in particular pigeons, which device has at least one carrier having at least one fastening part (2) and retaining parts (3), extending transversely with respect thereto, for barrier elements (6). They are adjustable relative to the retaining part (3). The carrier is provided with two spaced-apart guides (4, 7) for the barrier elements (6), of which the rear guide (7) in the direction of adjustment of the barrier elements (6) forms a stop for the barrier element (6) in the end position of the barrier element. The length (L) of the barrier elements (6) is at least approximately at most as great as the distance (A) between the guide (4) located at the front in the direction of adjustment and the upper or front edge (9) of the fastening part (2).

Description

[0001] Barrier device for keeping animals, preferably birds, especially pigeons, away.

[0002] The invention relates to a barrier device for repelling animals, preferably birds, in particular pigeons, according to the preamble of claim 1.

[0003] Solar or photovoltaic modules are increasingly being installed on building roofs. Gaps are formed between these modules and the roof, which birds use for perching and nesting. To prevent birds from accessing these gaps, barrier devices are known (EP 4 368 019 A1). These devices have spaced-apart barrier elements that block access to the gap. The barrier elements are mounted on a pin-shaped retaining element, which is held by a transverse mounting element that attaches the barrier device to the module. The barrier elements are in the form of sleeves that can be moved along the pin-shaped retaining elements until they rest on the roof. The barrier device consists of numerous individual parts, which complicates its manufacture and installation.

[0004] Locking devices are also known (DE 20 2017 005 880 U1) in which the mounting part is U-shaped. The mounting part is attached to the frame of the solar / photovoltaic modules by its crossbar. The locking elements are pins that protrude through openings in the leg of the mounting part extending from the crossbar. When the locking device is installed, the adjacent locking pins are offset to varying degrees relative to the mounting part, depending on the surface on which the locking pins rest in their installed position. As a result, the locking pins protrude more or less far beyond the frame of the solar / photovoltaic modules. This leads to shading of the modules, resulting in a loss of module performance. Furthermore, the locking pins protruding beyond the frame hinder the cleaning of the modules.Roller or disc brushes are used for cleaning to remove dirt particles and the like from the top of the modules. The protruding locking pins hinder cleaning, as the brushes cannot reach the edges of the modules due to these pins. Consequently, the modules must be cleaned manually at the edges. Furthermore, there is the problem that the protruding locking pins can be damaged during cleaning with the brushes, such as being bent or even broken off. In such cases, optimal locking protection is no longer guaranteed.

[0005] The invention is based on the objective of further developing such a locking device in such a way that it ensures optimal locking protection while being manufactured simply and cost-effectively.

[0006] This problem is solved according to the invention in the generic locking device with the characterizing features of claim 1.

[0007] In the locking device according to the invention, the locking elements are held and guided on the retaining part by two spaced-apart guides. The rear guide, in the adjustment direction of the locking elements, forms a stop for the locking element when it is in its end position. The rear guide thus prevents the locking element from detaching from the retaining part. The two guides ensure that the locking elements can be easily and precisely moved along the retaining parts to reach their respective installation positions. The locking elements are designed such that their length is at least approximately equal to the distance between the front guide, in the adjustment direction, and the upper or front edge of the mounting part.This ensures that the locking elements, in their fully extended position, do not protrude beyond the mounting element and thus beyond the solar / photovoltaic module, or only protrude so minimally that shading of the modules by the locking elements, which would lead to a loss of performance, is avoided in a structurally simple manner. Furthermore, thanks to the design according to the invention, the upper surface of the module can be easily cleaned right up to the edge using cleaning devices such as roller brushes or disc brushes. The locking elements are not damaged or destroyed by the cleaning process.

[0008] Advantageously, the locking elements are provided with a stop at their leading end (in the adjustment direction) that abuts the front guide when the locking elements are pushed up to their maximum position. This ensures that the locking elements do not protrude beyond the mounting part, even when pushed up to their maximum position.

[0009] The stop can be formed, for example, by a corresponding deformation of the end of the locking element. It is also possible to provide a transverse pin penetrating the locking element, a cap-shaped attachment, or similar features at the front end.

[0010] In an advantageous embodiment, the rear guide is a tongue projecting from the retaining part, which has a passage opening for the locking element. Due to the transversely projecting tongue, the locking element can be positioned only a short distance from the retaining part, so that only a small installation space is required for the locking device.

[0011] A particularly simple and cost-effective manufacturing process is achieved when the tongue is bent out of the retaining part. Especially when the retaining part is made of metal, the tongue can be very easily partially separated from the retaining part and then bent out.

[0012] A particularly simple design is achieved when the rear end of the locking element (in the adjustment direction) is fitted with a stop. In the locking element's end position, this stop interacts with the rear guide, ensuring that the locking element cannot slip out of the rear guide.

[0013] A particularly simple and cost-effective manufacturing process is achieved when the stop element is formed by a deformed end section of the locking element. Such a deformed end section can be easily incorporated into the locking element. In particular, it is not necessary to attach an additional component to the locking element to form the stop element.

[0014] Of course, the stop element can also be formed, for example, by a transverse pin which is provided at the rear end of the locking element and penetrates it in such a way that at least one end protrudes beyond the locking element.

[0015] A cost-effective and advantageous design is achieved when the front guide, in the adjustment direction of the locking element, projects transversely from the retaining part and has a through-opening for the locking element. The through-openings of the two guides are aligned with each other in the adjustment direction of the locking element, so that it is guided perfectly on the retaining part during adjustment.

[0016] A simple and cost-effective manufacturing process is achieved when the front guide is formed by the angled free end of the retaining part. In this case, it is only necessary to angle the free end of the retaining part accordingly. Attaching additional parts to the retaining part, which would involve considerable effort, is therefore unnecessary.

[0017] In another simple and cost-effective design, two adjacent locking elements are connected by a cross piece. In this case, two locking elements can be mounted simultaneously to the support brackets using a single insertion process. Simple and cost-effective manufacturing is advantageously achieved by forming the cross piece and the locking elements connected to it as a single piece. A rod, preferably bent into a U-shape, can then be used for this purpose. The legs of the rod form the two locking elements, and the web forms the cross piece.

[0018] The support beam can be secured in its installed position in any suitable way. One option is to equip the beam with at least one clamping element. This allows the beam, and thus the entire locking device, to be easily clamped to a corresponding support on the building's roof.

[0019] To facilitate the assembly of the locking device, in a further embodiment of the invention, the carrier for at least some of the locking elements is provided with a locking element that secures the locking element against displacement in a retracted position. This retracted position forms a rest position for the locking elements, in which they protrude only slightly beyond the retaining part. Since the locking elements are secured against displacement in this rest position, the locking device can be easily and securely assembled without obstruction from displaced locking elements.

[0020] The locking element is advantageously provided with a through-opening for the locking element. This allows the locking element to project through the through-opening of the locking element in its rest position. It is positioned at a distance from the two guides such that the through-openings of the guides and the locking element share a common axis.

[0021] A particularly advantageous design is achieved when the locking element is configured at one end such that it can only pass through the opening of the locking part in a predetermined position. The locking element is always long enough that, in its rest position, it projects through both guides, ensuring that the locking element is properly guided as soon as it is released from the locking part.

[0022] A simpler design from a manufacturing perspective results if the opening of the locking element has a non-circular cross-section. For example, the opening can have an elongated outline.

[0023] Advantageously, the locking element has a cross-sectional shape at its end adapted to the non-circular cross-section of the opening in the locking part. For example, if the opening in the locking part has an elongated outline, then the cross-sectional shape of the end of the locking element is also correspondingly elongated. The locking element can then only pass through this opening if the elongated cross-sectional shape of the end of the locking element is aligned with the elongated opening in the locking part. It is only necessary to rotate the locking element about its axis to move it into the release position.

[0024] The subject matter of the application is not only defined by the subject matter of the individual patent claims, but also by all information and features disclosed in the drawings and the description. These are claimed as essential to the invention, even if they are not explicitly stated in the claims, insofar as they are novel, individually or in combination, compared to the prior art.

[0025] Further features of the invention will become apparent from the further claims, the description and the drawings.

[0026] The invention is explained in more detail below with reference to several embodiments illustrated in the drawings. Fig. 1 shows a perspective view of a first embodiment of a locking device according to the invention with locking elements in a rest position.

[0027] Fig. 2 shows a perspective view of the rear view of the locking device according to Fig. 1.

[0028] Fig. 3 shows an enlarged and perspective view of part of the locking device according to the invention as shown in Figs. 1 and 2.

[0029] Fig. 4 shows the locking device according to the invention with locking elements in the locking position in a perspective view,

[0030] Figures 5 to 7 show further embodiments of a locking device according to the invention in a representation corresponding to Figure 1.

[0031] The barrier device serves to prevent animals, especially birds, preferably pigeons, from settling and / or nesting in the spaces between, for example, solar or photovoltaic modules and the roof. It can also prevent access to such spaces by animals such as martens.

[0032] The locking device according to Figures 1 to 3 has a carrier 1, which is advantageously made of metal and can be manufactured, for example, by a stamping process from a strip, a plate, or the like. The carrier 1 has only a small thickness, so that it requires little installation space in its installed position.

[0033] The support can also be made of any other suitable material, for example, a dimensionally stable, hard plastic. The support 1 has a band- or strip-shaped mounting part 2, from which narrow, strip-shaped retaining parts 3 project transversely, preferably vertically. The retaining parts 3 are formed integrally with the mounting part 2 and lie in a common plane with it.

[0034] The retaining elements 3 are arranged one behind the other along the fastening element 2, preferably at equal intervals. Advantageously, the retaining elements 3 are identical. The free end 4 of the retaining elements 3 is bent at a right angle and provided with a passage opening 5 for a locking element 6 (Fig. 3). The bent end 4 forms a tongue or guide for the locking element 6.

[0035] The locking element 6 is preferably designed in the form of a pin.

[0036] It can be moved from a starting or rest position (Figs. 1 to 3) into a locking position (Fig. 4). The diameter of the passage opening 5 corresponds to the outer diameter of the locking element 6, which is thereby reliably guided during its sliding movement.

[0037] A tongue 7 is bent out from the retaining part 3 at a distance above the angled free end 4. This tongue 7 also has a through-opening 8 (Fig. 3) for the locking element 6. The diameter of the through-opening 8 corresponds to the outer diameter of the locking element 6. The free end 4 and the tongue 7 guide the locking element 6 precisely during its sliding movement. The free end 4 and the tongue 7 are positioned at a distance from each other, which advantageously contributes to the precise guidance during the sliding movement of the locking element 6.

[0038] The tongue 7 is bent out of the retaining part 3 at a right angle. For this purpose, a corresponding cut is made in the retaining part 3 so that the tongue 7 can subsequently be bent out of it at a right angle. The fastening part 2 is provided with further tongues 10 at its upper edge 9, which are bent out in the same direction as the tongues 7. If the carrier 1 is preferably punched out from a metal strip or a metal plate, then the tongues 10 are punched out along with it. After the punching process, the tongues 10 are then bent at a right angle to the fastening part 2.

[0039] The tongues 10 have a passage opening 11 which, unlike the passage openings 5, 8, is elongated (Fig. 4). This shape of the passage opening 11 is used to secure the locking element 6 in its rest position as shown in Figs. 1 to 3.

[0040] The locking elements 6 are provided at their upper end with a deformed section 12 (Fig. 4). The outline of this end section 12 corresponds to the outline of the passage opening 11. This means that the locking element 6 can only be pushed through the passage opening 11 if the outlines of the end section 12 and the passage opening 11 match.

[0041] Due to the deformed end section 12, the locking element 6 is widened in one direction at this end, preventing it from sliding through the opening 8 of the tongue 7. Once the end section 12 is in contact with the tongue 7, the locking element 6 can no longer be moved downwards.

[0042] This lowest locking position is shown in Fig. 4.

[0043] The distance between the two tongues 7 and 10 determines the maximum displacement path of the locking elements 6. This distance depends on the height of the space to be sealed between the roof and a module located at a distance above it.

[0044] The end section 12 can be easily plastically deformed, so that no complex manufacturing processes are required. Figures 1 to 3 show the locking elements 6 in their upper rest position. The locking elements 6 are rotated about their axis so that they cannot be pushed through the openings 11 of the tongues 10. This is only possible when the locking elements 6 are rotated about their axis so that the deformed end section 12 coincides with the opening 11. Only then can the end section 12 be pushed through the opening 11.

[0045] The described anti-displacement mechanism for the locking elements 6 can, of course, also be achieved in other ways. For example, it is conceivable to provide the locking elements 6 at their free end with a transverse pin that passes through the locking element 6 and projects radially beyond it with one or both ends. In this case, too, the passage opening 11 is elongated so that the transverse pin can only pass through when properly aligned with the passage opening 11.

[0046] The locking elements 6 are long enough that, in their rest position as shown in Figures 1 to 3, they protrude through the openings 5 ​​and 8. This ensures that the locking elements 6 are reliably guided as soon as they are released from the tongues 10 and moved into their respective locking positions.

[0047] The tongues 10 facilitate easy mounting of the locking device on the roof. The locking elements 6 assume their rest position, so that they do not interfere with the installation of the locking device on the roof. Once the locking device is mounted, the locking elements 6 are rotated around their axis so that they are released from the tongues 10 and can be adjusted downwards. Advantageously, after release, the locking elements 6 fall downwards under their own weight until their lower ends touch the roof or the floor of the space to be locked. Alternatively, the locking elements 6 can be designed on the locking device so that they do not slide downwards on their own, but must be manually moved into the appropriate position along the retaining parts 3.

[0048] The support 1 can be made not only of metal, but also of plastic, such as polycarbonate.

[0049] The strip- or bar-shaped fastening element 2 is provided with openings 13 through which fasteners can be inserted to attach the fastening element 2 to the mounting surface. The openings 13 are advantageously positioned centrally between adjacent locking elements 6 in the fastening element 2. The fastening element 2 can also be mounted in any other suitable manner, for example, by gluing, nailing, screwing, etc.

[0050] Since the locking elements 6 are held in their rest position by means of the tongues 10, no additional locking means are required to hold the locking elements 6 in this rest position.

[0051] The locking elements 6 can be adjusted continuously so that the gap to be secured can be closed perfectly.

[0052] To ensure that the locking elements 6 do not protrude beyond the upper edge 9 of the support 1 or the fastening part 2 in the rest position according to Fig. 1, or only project insignificantly, it is advantageous if the tongues 10 are arranged at a distance below the edge 9, deviating from the illustrated embodiment. In this case, the tongues 10 are manufactured in the same way as the tongues 7. A corresponding cut is made in the fastening part 2 so that the tongue 10 can be bent out of the fastening part 2 at a right angle. The tongues 10 can also be provided on the retaining parts 3.

[0053] The locking elements 6 are advantageously widened at the lower end 27 to form a stop, so that they cannot be moved upwards through the passage openings 5 ​​of the tongues 4.

[0054] The pin-shaped locking elements 6 can have a length L that is at least approximately equal to, but no more than, the distance A between the upper edge 9 of the fastening part 2 and the tongues 4 (Fig. 7). This ensures that the locking elements 6 can only be moved upwards to the point where the lower end 27 rests against the tongue 4 and the upper end 12 does not protrude beyond the edge 9 of the fastening part 2, or at most only protrudes slightly. This position is shown in Fig. 7 for one of the locking elements 6. In this raised position, the locking element 6 rests with its lower end 27 against the tongue 4, which forms a counter-stop.

[0055] The lower end 27 is designed such that it cannot be pushed through the opening 5 of the tongue 4. The lower end 27 can be designed in the same way as the end section 12 of the locking element 6.

[0056] Clamping elements 14 can be attached to the fastening part 2 at a distance from each other, with which the locking device can be held at a corresponding fastening point by clamping.

[0057] The clamping elements 14 are arranged on the rear side of the fastening part 2, facing away from the locking elements 6. As shown in Fig. 2, the clamping element 14 has a tab 15 which is suitably attached to the rear side of the fastening part 2. Advantageously, the tab 15 is designed so that it does not project beyond a lower edge 16 of the fastening part 2. The tab 15 extends beyond the upper edge 9 of the fastening part 2 and curves into a lower leg 17 of the clamping element 14 (Fig. 3). The leg 17 advantageously extends perpendicular to the fastening part 2 and, viewed perpendicular to the fastening part 2, is located above it. This allows the locking device with the clamping elements 14 to be easily clamped onto the corresponding component.

[0058] The leg 17 curves into an upper leg 18, which is curved in a wave-like shape in side view. The free end 19 of the upper leg 18 is bent upwards, so that an insertion opening 20 is formed between the free end 19 and the lower leg 17, which makes it possible to easily clamp the locking device onto the respective support.

[0059] The two legs 17, 18 of the clamping element 14 are designed such that, when the locking device is mounted, the upper leg 19 rests on the support under elastic deformation.

[0060] To facilitate the insertion of the clamping element 14, the upper leg 18 is penetrated by an opening 21 over half its width, extending from the free end 19 to near the transition to the lower leg 17.

[0061] As a result of the opening 21, the upper leg 18 has two sections 18a, 18b which form spring sections that can be easily deformed elastically when the clamping element 14 is attached.

[0062] The two sections 18a, 18b are each provided with an oblique cut 22, 23 over a portion of their width, extending obliquely from the longitudinal edges towards the free end of sections 18a, 18b. The cuts 22, 23 form pointed hooks 24, 25 that project towards the lower leg 17. The hooks 24, 25 act as barbs that prevent the clamping element 14 from slipping off the support or the like.

[0063] The locking elements 6 and the clamping elements 14 are located on different sides of the fastening part 2. The clamping elements 14 are arranged on the locking device such that their insertion opening 20 is directed towards the locking elements 6 on the other side of the fastening part 2.

[0064] Fig. 5 shows an embodiment in which the fastening part 2 runs perpendicular to the retaining parts 3. The fastening part 2 and the retaining part 3 are advantageously formed in one piece. Both parts can be stamped from a metal strip, a metal plate, or the like, and then the fastening part 2 can be bent at a 90° angle to the retaining parts 3.

[0065] The retaining parts 3 are designed in the same way as in the previous embodiment.

[0066] The carrier 1 with the fastening part 2 and the retaining part 3 can also be made of a different material, for example, plastic.

[0067] Since the fastening part 2 is perpendicular to the holding parts 3, the clamping elements 14 can be attached to the fastening part 2 with their lower leg 17, for example by welding, gluing and the like.

[0068] Fig. 5 shows the clamping elements 14 without the opening 21 and the hooks 24, 25, as provided in the previous embodiment. Of course, the clamping elements 14 can also have a design corresponding to Figs. 1 to 4. Conversely, it is also possible, in the previous embodiment according to Figs. 1 to 4, to design the upper leg 18 according to the embodiment shown in Fig. 5.

[0069] It is also possible to design the locking device according to Fig. 5 without clamping elements.

[0070] In contrast to the previous embodiment, no rest position is provided for the locking elements 6. Accordingly, the tongues 10, which in the previous embodiment allowed the locking elements 6 to be held in the rest position, are absent. The locking elements 6 rest with their upper ends 12 on the tongues 7. During installation of the locking device, the locking elements 6 are moved upwards to a greater or lesser extent depending on the shape of the gap to be locked.

[0071] The locking device according to Fig. 6 has a similar structure to the locking device according to Fig. 5. The fastening part 2 of the carrier 1 is perpendicular to the retaining parts 3, along which the locking elements 6 are displaceable in their longitudinal direction.

[0072] The difference from the previous embodiment is that two adjacent locking elements 6 are connected to each other by a cross piece 26. The cross piece 26 and the two locking elements 6 connected to it form a U-shaped bracket. The two locking elements 6 and the cross piece 26 are bent from a single piece of wire.

[0073] The cross piece 26 forms a stop for the two locking elements 6 connected to it, by resting on the tongues 7 in the lowest position and thereby preventing further displacement of the locking elements 6.

[0074] The locking elements 6 are very easy to install by inserting them through the tongues 7, 10 of the retaining parts 3. The locking device can be used where access by animals, such as birds, especially pigeons, into a gap formed by elements placed one above the other at a distance is to be prevented.

[0075] The distance between the locking elements 6 is determined by the type of animal to be prevented from entering the space. Due to its design, the locking device requires only a small installation space and can be manufactured very cost-effectively. The tongues 4, 7, which guide the locking elements 6, are integrally formed with the retaining part 3 and, despite its thinness, provide it with sufficient strength. In particular, no additional guide elements are required to guide the locking elements 6; these would need to be attached separately to the retaining parts 3.

[0076] If the carrier 1 has been stamped as a metal part in the preferred embodiment, then the passage openings 5, 8, 11 and 13 can already be stamped in the stamped part, so that after the stamping process only the necessary bending processes to form the tabs 4 and the tongues 7, 10 have to be carried out.

[0077] Fig. 7 shows an embodiment in which the fastening part 2 and the retaining parts 3 are essentially identical to the embodiment according to Fig. 1. In contrast, the tongues 10 and the openings 13 are not provided. The clamping elements 14 are also missing.

[0078] The length L of the pin-shaped locking elements 6, as described above, is at least approximately equal to the distance A between the tongue 4 and the upper edge 9 of the fastening part. A slight projection of the locking elements 6 beyond the edge 9, for example approximately 5 mm, is not excluded.

[0079] These dimensional relationships can also be provided in the other embodiments. The fastening part 2 can, of course, also be provided with the openings 13. The fastening part 2 can also run perpendicular to the retaining parts 3, as shown in Fig. 5. In this case, dimension A is given by the distance between the tongues 4 and the front edge 9' (Fig. 5) of the fastening part 2.

[0080] If dimensions A and L are maintained, it is ensured that the locking elements 6, in their raised position, do not protrude beyond the mounting part 2, or only do so minimally. Since the locking device or the mounting part 2 is attached to a solar or photovoltaic module in such a way that the mounting part 2 does not protrude beyond the frame of such a module, the locking elements 6, in their fully raised position, also do not protrude beyond the module frame, or at most only do so slightly. This prevents the modules from being shaded by the protruding locking elements 6, which would lead to a loss of module performance.

[0081] The modules are frequently cleaned on their upper surface using cleaning equipment, such as roller brushes or disc brushes. Since the locking elements 6 do not protrude beyond the modules, they can be easily cleaned right up to the module edge using these cleaning devices.

Claims

Claims 1. A locking device for warding off animals, preferably birds, in particular pigeons, comprising at least one carrier (1) which has at least one fastening part (2) and retaining parts (3) extending transversely to it for locking elements (6) which are adjustable relative to the retaining part (3), which has two spaced-apart guides (4, 7) for the locking elements (6), of which the rear guide (7) in the adjustment direction of the locking elements (6) forms a stop for the locking element (6) in its lower end position, characterized in that the length (L) of the locking elements (6) is at least approximately at most as large as the distance (A) between the front guide (4) in the adjustment direction and the upper or front edge (9, 9') of the fastening part (2).

2. Locking device according to claim 1, characterized in that the locking elements (6) are provided at their front end (27) in the adjustment direction with a stop which, in the maximum raised position of the locking elements (6), abuts the front guide (4).

3. Locking device according to claim 1 or 2, characterized in that the rear guide (7) is a tongue projecting from the retaining part (3) which has a passage opening (8) for the locking element (6).

4. Locking device according to one of claims 1 to 3, characterized in that the tongue (7) extends from the retaining part (3) is bent outwards.

5. Locking device according to one of claims 1 to 4, characterized in that the rear end of the locking element (6) in the adjustment direction is provided with a stop part (12).

6. Locking device according to claim 5, characterized in that the stop part (12) is formed by a deformed end section of the locking element (6).

7. Locking device according to one of claims 1 to 6, characterized in that the guide (4) at the front in the adjustment direction of the locking element (6) projects transversely from the retaining part (3) and has a passage opening (5) for the locking element (6).

8. Locking device according to one of claims 1 to 7, characterized in that the front guide (4) is formed by the angled free end of the retaining part (3).

9. Locking device according to one of claims 1 to 8, characterized in that two adjacent locking elements (6) are connected to each other by a transverse piece (26).

10. Locking device according to claim 9, characterized in that the transverse piece (26) and the locking elements (6) connected to it are formed in one piece.

11. Locking device according to one of claims 1 to 10, characterized in that the carrier (1 ) is provided with at least one clamping element (14).

12. Locking device, in particular according to one of claims 1 to 11, characterized in that the carrier (1) is for at least a part the locking element (6) is provided with a locking part (10) which locks the locking element (6) in a retracted position against displacement.

13. Locking element according to claim 12, characterized in that the locking part (10) has a passage opening (1 1 ) for the locking element (6).

14. Locking element according to claim 13, characterized in that the locking element (6) is designed at one end such that it can only pass through the passage opening (1 1 ) of the locking part (10) in a predetermined position.

15. Locking element according to one of claims 12 to 14, characterized in that the passage opening (11 ) of the locking part (10) has a non-circular cross-section.

16. Locking element according to claim 15, characterized in that the locking element (6) has at its end a cross-sectional shape adapted to the non-circular cross-section of the passage opening (11) of the locking part (10).

Images