Closing device for an electrical enclosure, and a corresponding electrical enclosure

Abstract

A locking device for a switch cabinet, with a lock door and a secondary door, wherein the secondary door, on a vertical outer edge opposite its hinge side, has a U-profile formed on a door leaf of the secondary door with a receptacle for a lock mechanism of the lock door, which receptacle is offset back relative to the door leaf and which is open towards the door leaf, wherein on an outer free profile side of the U-profile, a swivelling lever of a lock of the secondary door is pivotably mounted about an axis of rotation between an open position and a locking position. Furthermore, a corresponding switch cabinet is described.

Claims

1. A locking device for a switch cabinet, the switch cabinet having a lock door and a secondary door that swing between open and closed positions about side hinges, said locking device comprising: a door leaf for the secondary door, the door leaf terminating opposite its hinge in a U-profile, the U-profile being oriented towards the interior of the cabinet to provide a receptacle opening facing towards the front exterior of the cabinet, the receptacle receiving a portion of the lock door when the lock door is closed; the U-profile having a leg portion formed from a free profile side end of the door leaf of the secondary door and extending towards the front exterior of the cabinet; and a lock for the secondary door, the lock having a swiveling lever connected to the leg of the U-profile mounted about an axis of rotation between an open position and a locking position.

2. The locking device according to claim 1, in which the swivelling lever is pivotable in a plane between the open position and the locking position, which plane extends parallel to the free profile side.

3. The locking device according to claim 1, in which the axis of rotation extends perpendicular to the free profile side of the U-profile.

4. The locking device according to claim 1, in which the free profile side extends at least approximately perpendicular or at an obtuse angle to the door leaf.

5. The locking device according claim 1, in which, in the open position, the swivelling lever extends to the front of the secondary door beyond the door leaf plane, and in which in the locking position, the swivelling lever is arranged completely behind the door leaf plane.

6. The locking device according to claim 1, in which the lock of the secondary door comprises a first and a second push rod, to which the swivelling lever is mechanically coupled via a scissor element, the push rods extending along an outer side of a further profile side of the U-profile arranged on the rear side of the secondary door, which further profile side is formed by a bent edge on the outer free profile side of the U-profile.

7. The locking device according to claim 1, in which the lock of the secondary door comprises a first and a second push rod to which the swivelling lever is mechanically coupled via a scissor element, wherein a first toggle lever of the scissor element is connected at opposite ends to the first push rod and the swivelling lever via a respective first rotary connector and a second toggle lever of the scissor element is connected at opposite ends to the second push rod and the swivelling lever via a respective second rotary connector.

8. The locking device according to claim 7, in which in each setting position of the swivelling lever, at least one of the toggle levers overlaps over its entire length with the outer free profile side of the U-profile or a pinch protection cover fixed thereto and projecting beyond it.

9. The locking device according to claim 7, in which at least one of the toggle levers has a toggle lever rod and a V-shaped pinch protection cover which is either integrally formed on the toggle lever rod or releasably connected to it.

10. The locking device according to claim 7, in which the toggle levers are each connected to the respective push rod via an L-shaped coupling element, which has a first attachment side which extends parallel to the outer free profile side of the U-profile and which has the rotary connector, and which coupling element has a second attachment side, which is connected to the push rod and extends parallel to an outer side of a further profile side of the U-profile arranged at the rear of the secondary door.

11. The locking device according to claim 7, in which a pinch protection cover is fixed to the U-profile and extends parallel to the outer free profile side of the U-profile and protrudes from the rear of the U-profile.

12. The locking device according to claim 7, in which, in the open position of the swivelling lever, a first of the toggle levers extends parallel to the outer free profile side of the U-profile and protrudes from the rear of the U-profile.

13. The locking device according to claim 7, in which, in the open position of the swivelling lever, a second of the toggle levers extends parallel to the outer free profile side of the U-profile and protrudes over the front of the U-profile.

14. The locking device according to claim 7, in which the toggle levers are attached to the swivelling lever oppositely with respect to the axis of rotation of the swivelling lever, wherein further axes of rotation of the rotary connectors connecting the toggle levers to the swivelling lever are arranged between the toggle levers and the swivelling lever parallel to the axis of rotation of the swivelling lever.

15. The locking device according to claim 14, in which, in the open position of the swivelling lever, the other axes of rotation are arranged oppositely in relation to the door leaf and protrude relative to the door leaf as well as the U-profile on opposite sides thereof, wherein, in the locking position of the swivelling lever, the other axes of rotation are situated in front of the outer free profile side of the U-profile.

16. A switch cabinet, which has a locking device according to claim 1, the lock door and the secondary door being hinged to opposite vertical profiles of a frame of the switch cabinet, wherein in a closed position of lock door and secondary door the receptacle of the secondary door is covered by the lock door.

17. The switch cabinet according to claim 16, in which the frame has a horizontal strut which connects opposite ends of the vertical profiles to one another, wherein a sealing center piece with a profile receptacle open to the outer side of the frame is attached to the horizontal strut, and wherein a sealing element is accommodated in the profile receptacle which seals the U-profile at one of its longitudinal ends with respect to the profile receptacle.

18. The switch cabinet according to claim 17, in which the sealing center piece is attached to a Z-edge of the horizontal strut, wherein an upper horizontal profile side of the Z-edge has a system perforation of regularly spaced fastening receptacles, wherein the sealing center piece has a passage aligned with one of the fastening receptacles for the free end of a push rod of the lock, and wherein the free end extends into the horizontal strut through the passage and the aligned fastening receptacle in the locking position of the swivelling lever.

19. The switch cabinet according to claim 17, in which the sealing center piece comprises a hard component having the profile receptacle and a soft component forming the sealing element, the sealing element lining the profile receptacle along its inner circumference, wherein the sealing element has several sealing lips spaced parallel to one another and projecting horizontally from the inner circumference.

20. The switch cabinet according to claim 17, in which on a side facing the interior of the frame, the profile receptacle has a cut-out into which a portion of the sealing element projects.

Description

DRAWINGS

(1) The drawings described herein are for illustrative purposes only of selected embodiments and not all possible implementations, and are not intended to limit the scope of the present disclosure.

(2) Further details of the invention are explained using the figures below. These show:

(3) FIG. 1 in perspective view, a secondary door with a swivelling lever arranged in the open position;

(4) FIG. 2 the embodiment according to FIG. 1 in plan view of the vertical face of the locking device;

(5) FIG. 3 a perspective view of the rear of the locking device according to FIG. 1 facing the switch cabinet interior;

(6) FIG. 4 a perspective view of the side of the lock door and secondary door facing the switch cabinet interior in the area of the base frame of the switch cabinet

(7) FIG. 5 a perspective view of a sealing center piece according to an embodiment of the invention;

(8) FIG. 6 a perspective view of the side of the lock door and secondary door facing the switch cabinet interior according to another embodiment of a locking device in the locking position of both the secondary door lock as well as the lock door and secondary door;

(9) FIG. 7 a detailed view of another embodiment of a locking device according to the invention; and

(10) FIG. 8 a horizontal cross section of the switch cabinet with the doors in a closed position.

DETAILED DESCRIPTION

(11) Example embodiments will now be described more fully with reference to the accompanying drawings.

(12) To simplify the illustration, the locking device for a switch cabinet shown in FIG. 1 is shown without the lock door 1, which is complementary to the secondary door 2 shown. The secondary door 2 is designed as a sheet metal part with a door leaf 6, on the vertical longitudinal edge of which a U-profile 7 is integrally formed, in particular bent from the door leaf 6. Such a secondary door 2 is known from DE 198 06 064 C1, for example.

(13) On an outer end face, the U-profile 7 has an outer free profile side 10 to which the swivelling lever 11 is parallelly pivotable between an open position and a locking position of the locking mechanism 12 of the secondary door 2. In particular, the swivelling lever 11 can be rotated about an axis of rotation x, which extends perpendicular to the outer free profile side 10 of the U-profile 7.

(14) With respect to the axes of rotation x, which are located before and after the axis of rotation y, a toggle lever 15 is fixed to the swivelling lever 11 via a rotary connector 16 so that it can rotate relative to the swivelling lever 11. The two toggle levers 15 are connected at their ends facing away from the swivelling lever 11 via a further rotary connector 16 each to a coupling element 19, via which the toggle levers 15 are each coupled to a push rod arranged on the rear side of the U-profile 7. While the push rod mechanism, as in the case of the locking devices known from the state of the art, is thus still arranged on the side of the secondary door facing the switch cabinet interior, the secondary door lock 12 and in particular its swivelling lever 11 is accessible via the front side of the secondary door 2, so that the secondary door 2 is easy to handle.

(15) With reference to FIGS. 2 and 3, further details of the locking device shown in FIG. 1 become clear. In particular, the toggle lever 15, which projects beyond the front of the secondary door 2 in the open position of the secondary door lock 12, has a pinch protection cover 17 formed on a toggle lever rod 18 of the toggle lever 15. As shown in FIG. 2, the pinching protection cover 17 covers the area between the outer free profile side 10 of the U-profile 7, the toggle lever rod 18 protruding from the front of the secondary door 2, and the swivelling lever 11, in order to prevent fingers from being caught when pivoting the swivelling lever 11 and thus preventing the aforementioned components of the scissor element 14 from shifting relative to each other.

(16) On the outer side 3 of the further profile side 22 of the U-profile 7, the outer side facing the switch cabinet interior, a further pinch protection 17 is attached, which extends beyond the outer side 3 and thus in the installation situation in the direction of the switch cabinet interior. The further pinch protection cover 17 can be attached to the U-profile 7, for example screwed to the further profile side 22 of the U-profile 7.

(17) FIG. 2 further shows that the push rods 13 are fixed to the further profile side 22 of the U-profile 7 by means of a welded bolt 9, whereby in an end area where the push rods 13 are placed on the bolt 9 via a keyhole, the push rods 13 have an oblong hole along which the respective push rod 13 can be moved across the respective bolt 9. Further details are shown in FIG. 3.

(18) The two toggle levers 15 are each connected to the push rod via an L-shaped coupling element 19. While the toggle levers 15 can be pivoted in a plane that extends parallel to the outer free profile side 10 of the U-profile 7, the translatory linear movement achieved with the aid of the scissor element 14 is shifted via the L-shaped coupling elements 19 in a plane that extends along the outer side 3 of the other profile side 22 of the U-profile 7 at the rear of the secondary door 2. In this way it is possible that, when the push rod mechanism is arranged behind the secondary door 2 in a covered manner, the swivelling lever 11 itself can be arranged in front of the secondary door 2 and thus can be easily accessible for a user. The combination of FIGS. 1 to 3 also shows that the shown embodiment has been realized with simple technical means. For example, the L-shaped coupling elements can also be formed as simple, edged sheet metal parts.

(19) FIG. 4 shows an exemplary embodiment of a switch cabinet 100 in the area of the base frame of the frame 110. The base frame has a front horizontal strut 120, which limits the door-side opening of the frame 110 on the base side. The lock door 1 and the secondary door 2 are hinged to opposite vertical profiles (not shown) of the frame 110, as known from DE 10 2016 117 378 B3, for example.

(20) The horizontal strut 120 of the frame 110 connects the opposite ends of the vertical profiles with each other and has a sealing center piece 200, which is attached to the horizontal strut 120 via a profile receptacle 210 open to the outside of the frame 110. A sealing element 220 is accommodated in the profile receptacle 210, which seals the U-profile 7 of the secondary door 2 at its bottom longitudinal end against the profile receptacle 210.

(21) A suitable base frame is known from DE 10 2015 121 193 B4, for example. The horizontal strut 120 of the embodiment shown in FIG. 4 is formed accordingly and therefore has a Z-edge 121 on its outer circumference, via which the sealing center piece 200 is attached to the horizontal strut 120. In addition, an upper horizontal profile side 122 of the Z-edge 121 has a system perforation of regularly spaced fastening receptacle 123. The sealing center piece 200 has a passage 230 which is aligned with one of the fastening receptacles 123 for the free end of the push rod 13 of the lock 12, whereby the free end of the push rod 13 in the locking position extends through the passage 230 and the aligned fastening receptacle 123 into the horizontal strut 120 and thus locks the secondary door against the frame.

(22) As can be seen in FIG. 5, the passage 230 has a run-up slope 270, which the free end of the push rod meets when the push rod 13 is moved from its release position to the locking position. Thereby, the U-profile 7 is pressed further into the profile receptacle 210 under pre-tension of the sealing element 220, wherein the sealing element 220 is compressed and thus an effective sealing of the U-profile 7 of the secondary door 3 against the frame is achieved.

(23) In particular, the sealing center piece 200 can be formed as a plastic moulding and the sealing element 220 can line the profile receptacle 210 along its inner circumference. The sealing element 220 has several sealing lips 240 spaced parallel to each other and projecting horizontally from the inner circumference.

(24) The combination of FIGS. 4 and 5 also shows that the sealing element 220 has at its end protruding from the profile holder 210 a sealing web 260 opposite each, with which the sealing center piece 200 is sealed in the closed position of the secondary door 2 shown in FIG. 4 against a seal 24 applied to the inner side of the secondary door 2.

(25) Analogously, a further sealing center piece can be arranged on an upper horizontal strut of the frame, which seals the U-profile 7 at its upper end against the frame. With the aid of the sealing center pieces and the seal 24 applied to the inner sides of the door, it is possible to achieve a circumferentially closed sealing of the switch cabinet door side against the switch cabinet frame.

(26) FIG. 6 shows an embodiment of a locking device in the locking position, in which all components of the scissor element, in particular the two toggle levers 15 and the swivelling lever 11 itself, are arranged in alignment with the outer free profile side 10 of the U-profile 7, thus saving space, so that, on the one hand, when closing the lock door of the locking device, the secondary door lock 12 cannot collide with the lock door and, on the other hand, the elements of the scissor element 14 also cannot protrude into the installation space of the switch cabinet housing and collide with switch cabinet installations there. The only elements of the locking device that project beyond the push rod mechanism into the interior of the switch cabinet housing are the pinch protection covers 17. In one embodiment these can be detachably connected to the toggle lever rod 18 or the U-profile 7 respectively, so that in the application where there is a risk of collision between the pinch protection covers 17 and switch cabinet internals, the use of the pinch protection covers 17 can be omitted at the expense of the pinch protection.

(27) A tubular door frame 23 each is arranged on the inner sides of lock door 1 and secondary door 2, the tubular door frame 23 on the lock door side being arranged in such a way that, in the closed position of secondary door 2 and lock door 1 shown in FIG. 6, sufficient space is created between the outer free profile side 10 of the U-profile 7 and the tubular door frame 23 to accommodate the secondary door lock 12 between the tubular door frame 23 and the outer free profile side 10 in the locking position of the secondary door lock 12.

(28) With reference to FIG. 7, the attachment of the push rod mechanism on the outer side 3 of the further profile side 22 of U-profile 7 is shown. Weld bolts 9 are fixed to the further profile side 22 via the outer side 3, onto which the push rods are in turn attached via a keyhole-shaped oblong hole. In order to prevent the push rods 13 from coming loose from the bolt 9, the push rods are secured by means of a securing attachment 25 placed on the bolts, which additionally has the function of a stop by engaging in the oblong-shaped keyhole 26, as shown in the lower detailed view of FIG. 7, so that the part of the securing attachment 25 engaging in the hole 26 forms a stop which prevents the bolt 9 from aligning with the wide end of the keyhole 26 and thus prevents the push rod 13 from coming loose.

(29) In summary, FIG. 8 shows the secondary door 2 and lock door 1 in the closed position. The door leaf 6 of the secondary door 2 terminates in the U-profile 7. The U-profile 7 is offset towards the interior of the switch cabinet to provide a receptacle 8 opening towards the exterior of the cabinet for receiving for a bent end portion of the lock door 1. The U-profile 7 has a leg portion 5 formed from a free profile and of the door leaf 6 of the secondary door 2. The swiveling lever 11 of the secondary door lock is connected to the leg 5 of the U-profile 7 about an axis of rotation x between an open position and a locking position. When the swiveling lever 11 is in the closed position, it is located completely interiorly of the door leaf 6. A key 30, for example, can be used to engage a lock mechanism 27 to secure the locked door 1 in a locked position. To open the doors, the key 30 can be used to unlock the lock door 1 and a handle 31, for example, can be grasped by the user to pull open the lock door 1. Then, the swiveling lever 11 can be rotated to unlock the secondary door 2.

(30) The features of the invention disclosed in the above description, drawings and claims may be essential for the realisation of the invention either individually or in any combination.

(31) The foregoing description of the embodiments has been provided for purposes of illustration and description. It is not intended to be exhaustive or to limit the disclosure. Individual elements or features of a particular embodiment are generally not limited to that particular embodiment, but, where applicable, are interchangeable and can be used in a selected embodiment, even if not specifically shown or described. The same may also be varied in many ways. Such variations are not to be regarded as a departure from the disclosure, and all such modifications are intended to be included within the scope of the disclosure.