DK2733286T3

DK2733286T3 - Swing arm closure with low recess depth

Info

Publication number: DK2733286T3
Application number: DK13191512.6T
Authority: DK
Inventors: Andreas Kuhnen; Jörg Skopnik
Original assignee: Emka Beschlagteile Gmbh & Co Kg
Priority date: 2012-11-19
Filing date: 2013-11-05
Publication date: 2018-03-12
Also published as: EP2733286A2; EP2733286A3; DE102012111095B4; ES2661495T3; DE102012111095A1; EP2733286B1; PL2733286T3

Description

The invention relates to a retractable lock for doors of, in particular, thin-walled switching cabinets, having a tray, which is to be mounted on the front side of the door panel and is designed for retractably receiving a lever handle, wherein said lever handle can be fixed in its position in which it is retracted into the tray using a closing device and can be swivelled out from the tray into an activation position about a pivot axle formed in the tray, and the activation movement of the lever handle, which is oriented in the plane perpendicular to the door panel and stablilized by a spring resting on the tray, can be converted into the rotation of an externally toothed pinion driving at least one locking rod. A retractable lock having the aforementioned generic features is disclosed in DE 297 05 508 U1. To the extent that it is even possible with this lock to dispense with a bar lock for driving the at least one locking rod, for example, as used in the lock also known from EP 0 261 266 Bl, in the lock known from DE 297 05 508 U1 with regard to the use of the lock in switching cabinets with particularly narrow tilting spaces to be used for the arrangement of the locking rods, the activation path of the lever handle is configured in a plane perpendicular to the door panel, wherein the pinion, which is driven by the lever handle when activated, is arranged perpendicular to the plane of the door panel and engages directly in the recesses arranged in an associated locking rod. A retractable lock, wherein the pinion driven by the lever handle during the activation thereof is arranged parallel to the plane of the door panel, is known from EP 1 900 891 A2.

The known lock is firstly associated with the disadvantage of a corresponding installation depth, because the tray with an attachment formed thereon passes through the door panel in an associated breakthrough, and the pivot mounting of the lever handle and the pivot bearing for the pinion connected to the handle lever are arranged in the attachment. The position of the pinion, oriented perpendicular to the plane of the door panel, requires a correspondingly large distance between the locking rod and the door panel, which depending on the installation space available in a switching cabinet, can be excessive. Another drawback is that, via the pinion positioned perpendicular to the plane of the door panel, only one locking rod can be driven in only one direction.

The object of the invention is therefore to reduce the required installation depth of a retractable lock having the above-mentioned generic features.

The solution to this problem, including advantageous embodiments and extensions of the invention, is derived from the content of the patent claims, which are given after this description .

The underlying idea behind the invention provides that in the inside of the tray, two sliders, which surround the pinion between them in a plane parallel to the door plane, each having a gearing system that engages in the external gearing system of the pinion and therefore executes a contrary movement during rotation of the pinion, are arranged such that they can be longitudinally displaced, of which one slider is connected to the lever handle via a connector, hinged thereto and also hinge-connected to the lever handle, in such a way that the pivoting of the lever handle taking place perpendicular to the door panel is converted into a longitudinal movement of the slider that is connected to the lever handle, said movement driving the pinion, wherein at their opposite ends the sliders have connecting structures which penetrate the door panel in associated recesses, in each case for connecting one locking rod extending on the inside of the door panel.

The invention is associated with the advantage that due to the parallel alignment of the pinion with respect to the door panel and its arrangement within the tray the installation depth of the lock is reduced. Since additionally, due to the arrangement of the pinion corresponding sliders are arranged on its two sides, two sliding locking rods, which can be moved in a reverse movement, can also be used and these can be guided close to the plane of the door panel, because the extent of the penetration of the connecting structures through the door panel can be selected. Finally, the orientation of the connector arranged between the lever handle and the connected slider results in the fact that, when closing the lock by pushing the lever handle into the tray, this connector has almost the same force direction as the sliders towards the end of the insertion path, so that to overcome the maximum sealing pressure occurring at the end of the closing process when the door is closed, the lock also provides the maximum torque .

According to one exemplary embodiment of the invention, provision is made that at each of their two ends the sliders have a projection which retracts inwards under spring action.

One exemplary embodiment of the invention provides that the connecting structures are mounted on the inwardly retracting projections of the two sliders in such a way that the connecting structures for the locking rods that run aligned are located on the central longitudinal axis of the tray. This ensures a symmetric assignment of the tray and associated locking rods, so that the tray with the actuating mechanism for the locking rods arranged therein can be inserted in a position rotated by 180 degrees, without having to adapt the arrangement of the aligned locking rods.

According to one embodiment of the invention it is also provided that the connecting structures have a fork-shaped design with fork legs and a frontally located opening between the fork legs, for receiving the assigned locking rod or part thereof in a form-locking and releasable manner. Since the locking rods are normally fixed on the inner side of the door panel using rod guides attached thereto, the advantage of this design is that the lock can be removed from the door panel without prior release of the locking rods of the locking mechanism. During the assembly, the tray with the connecting structures that project above its base plate merely needs to be placed on the door panel, because the open fork legs that penetrate the door panel slide over the associated locking rod or part of it. Since the direction of force of the locking rod is oriented parallel to the plane of the door panel and therefore perpendicular to the connection direction between the tray and the locking rod, no further measures are necessary for the function of the lock with connected locking rods. This substantially facilitates the assembly or disassembly.

It can additionally be provided that the connector, which is hinge-connected to the lever handle, is hinge-connected to the inwardly retracting projection of the slider connected to the lever handle.

In order to ensure the best possible force direction when closing the lock, according to one exemplary embodiment of the invention it is provided that the projection of the slider, which is connected to the lever handle and connected to the connector, retracts so far inwards that the connection of the slider and connector is located underneath the longitudinal axis of the lever handle.

In one embodiment of the invention it can be provided that the connector, which is pivotably hinged to the lever handle at its one end by means of a bearing axle, is fork-shaped at its other end, and with its fork legs encloses an attachment located on the projection of the slider, wherein a bearing pin is provided, which penetrates the fork legs and the attachment to form a pivoting bearing between connector and slider.

The drawing shows an exemplary embodiment of the invention, which is described below. The single figure shows a retractable lock in its locked position with the lever handle tilted slightly outwards into a handling position, in which the tray receiving the respective components is not shown with all of its side walls included.

The retractable lock apparent from the drawing consists of a tray 10, which can be mounted on a door panel, not shown separately, and can be suitably fastened thereto. To this end, the tray has a screw arrangement 11 at each of its opposite ends. On the front of the tray 10 which comes to rest on the outer side of the door panel, a recess 12 is implemented, which is formed by the side walls, not shown in the drawing, for receiving a retractable handle lever 13 arranged therein. The lever handle 13 is pivotably mounted at its upper end on a pin fixed in the tray 10 and forming the pivot axle 14 of said handle, in such a way that a pivoting motion of the lever handle 13 is possible in a plane perpendicular to the tray 10 or to the door panel that bears the tray. The lever handle 13 is pre-tensioned by means of a spring 15 supported on the tray 10 into a handling position where it is tilted out of the recess 12 of the tray 10.

At the lower end of the tray 10, opposite to the mounting of the lever handle 13, a cylinder lock 16 is arranged, which interacts with a lever locking mechanism 17 arranged at the associated end of the tray 10. The design of such a lever locking mechanism 17 is known in the prior art. It is designed in such a way that the lever handle 13 pressed into the recess 12 of the tray 10 engages with the lever locking mechanism 17 and is thereby fixed in place. By activating the cylinder lock 16, the lever locking mechanism 17 can be released in such a way that the lever handle 13 swivels out of the recess 12 of the tray 10 under the action of the spring 15 into the handling position shown in Figure 1. Cylinder lock 16 or lever locking mechanism 17 are housed in an attachment 18 arranged in the tray 10, which can be closed off with a cap 19, so that at its associated lower end the tray 10 is furnished with a closed housing which receives lever lock 17 together with cylinder lock 16, and which protrudes through the door panel.

In the interior of the tray 10, a pinion 20 with an external gearing system 21 is arranged in a parallel alignment with the door panel, not shown, or with the base of the recess 12 of the tray 10. On both sides of the pinion 20, sliders 22 and 23, which are displaceable in their longitudinal direction, are arranged in the recess 12 of the tray 10, wherein the sliders on their side facing the pinion 20 are each provided with a gearing system 24, which is in constant engagement with the external gearing system 21 of the pinion 20. The two sliders 22 and 23 are arranged in such a way that on rotation of the pinion 20 they each execute a contrary movement in relation to each other. The sliders 22 and 23 have an inwardly retracting projection 31 at each of their two opposite ends.

The one slider 22 is hinge-connected to the lever handle 13 via a connector 25 hinge-mounted thereon. Thus, the one end 26 of the connector 25 is hinge-connected to the lever handle 13 by means of a mounting axle 27, while the opposite end 28 of the connector 25 has a forked design, with fork legs 29 spaced apart from each other. The fork legs 29 comprise an attachment 32, arranged on the associated projection 31 of the slider 22 and extending in the longitudinal direction of the tray 10, wherein the attachment 32 and the fork legs 29 are penetrated by a bearing pin 30 in such a way that the connector 25 is hinge-connected to the slider 22.

The two sliders 22 and 23 have connecting structures 33 at their mutually opposite ends, which penetrate the base of the tray 10 and in the case of a door panel-mounted tray, the door panel, in associated breakthroughs, so that locking rods, not shown, can be connected to each of the connecting structures 33. For this purpose, the connection structures 33 are forked with fork legs 34 and have an opening between them, so that one end of an assigned locking rod can be connected to each of the fork legs 34 in a releasable connection. Where it is provided that in the lock described above the locking rods are placed in an escape on the longitudinal axis of the tray 10, the connection structures 33 are also arranged on the underside of the projections 31 of the two sliders 22 and 23, facing the door panel. In addition, the technical background to the fork-shaped design of the connection structures with an opening located between the fork legs 34 is that during the assembly of the tray 10 on a door panel, the connection structures 33 need only be pushed over the locking rods preassembled on the inner side of the door panel, so that a purely form-locking and releasable connection is obtained between connector structures 33 and locking rods. This connection can be made or released simply by plugging the tray 10 onto, or removing it from, the door panel respectively.

The retractable lock described above functions as follows: Starting from a closed position of the lock, not shown in the drawing but comprehensible on the basis of the description, with a lever handle 13 folded into the recess 12 of the tray 10, an activation of the cylinder lock 16 via the appropriately actuated lever locking mechanism 17 leads to a release of the lever handle 13, which under the action of the spring 15 that pretensions it, firstly occupies its handling position apparent from the drawing. A further pivoting of the lever handle 13 out of the tray 10 to open the lock is converted directly, via the connector 25 connected to the lever handle 13, into a longitudinal displacement of the slider 22 connected to the connector 25 (to the left in the drawing), which, in turn, rotates the pinion 20 through the engagement of its gearing system 24 with the external gearing system 21 of the pinion 20, which during its rotation by engagement of its external gearing system 24 in the gearing system 24 of the opposite slider 23, also produces a displacement of the slider 23 in the opposite direction (to the right in the drawing) . Due to the movement of the sliders 22 and 23, the connection structures 33 are moved closer to each other, so that locking rods attached thereto are also moved into an unlocked position.

To close the lock, the lever handle 13 is moved in the direction of the tray 10, and this movement is also converted into an opposite longitudinal displacement of the sliders 22 and 23, so that the connection structures 33 located thereon are forced apart and the locking rods attached thereto are moved into the locking position. It is apparent that near the end of the insertion path the connector 25 has almost the same direction of force as the course of the two sliders 22, 23, so that the lever handle 13 exerts the maximum torque at the point when the highest sealing pressure needs to be overcome when closing the door or its locking mechanism. Upon reaching the handling position the closed position of the locking rods is reached, and the lever handle 13 can be depressed against the action of the spring 15 into the recess 12 of the tray 10 until it engages with the lever locking mechanism 17.

The features of the subject matter of these documents disclosed in the above description, the claims, the abstract and the drawing can be essential to the implementation of the invention in its various embodiments both individually and in any combination with each other.

Claims

1. Submersible closure for doors, especially on thin-walled contact cabinets with a recess (10) to be placed on the front of the door plate and arranged for a lowerable accommodating of an arm grip (13) where the arm grip (13) can be fixed in its position, where it is folded into the recess (10), via a closing device (16, 17) and can be folded out of the recess (10) around a pivot axis (14) formed in the recess (10) to an actuation position, and the activation path for the arm grip (13), oriented in the plane perpendicular to the door plate and supported by a spring (15) supported on the recess (10), can be turned into a tooth drive (20) with an external tooth, operating at least one locking bar, characterized in that in the interior of the recess (10) are placed two sliding means (22, 23) which include the tooth drive (20) located in a plane parallel to the door plate , between them, each with a tooth engaging (24) which engages the outer tooth (21) of the tooth drive (20) and thereby perform an opposite movement when the tooth drive (20) rotates longitudinally displaceable and of which one slider (22) is connected to the arm grip (13) via a connecting link (25) connected to the joint and both to the arm grip (13) in such a way that the swing of the arm grip (13) made perpendicular to the door plate is translated into a longitudinal displacement driving the tooth drive (20) of the slider (22) connected to the arm grip (13), the slider (22, 23) at their opposite ends being provided with connecting configurations (33) which run through the door plate in assigned recesses, for connecting in each case a locking rod extending on the inside of the door plate.

A submersible closure according to claim 1, characterized in that the sliding means (22, 23) are each provided with a projection (31) projecting inwardly, at both their ends.

Submersible closure according to claim 2, characterized in that the connection designs (33) on the projections (31) projecting inwardly on the two sliders (22, 23) are arranged in such a way that the connection designs (33) for the locking bars which align with each other is on the longitudinal center axis of the recess (10).

Submersible closure according to one of Claims 1 to 3, characterized in that the connection designs (33) are formed fork-shaped with fork legs (34) and an opening located between the fork legs (34) at the front, for a form-fitting and detachable receiving the associated locking rod or part thereof.

A submersible closure according to claim 2, characterized in that the connecting link (25), which is connected to the lever (13), is connected to the projection (31) which projects inwardly on the slider (22) connected to the the arm grip (13).

A submersible closure according to claim 3, characterized in that the projection (31) connected to the connecting link (25) on the slider (22) connected to the arm grip (13) protrudes so far inward that the connection between the slider (22) and the connecting link (25) are under the longitudinal axis of the arm grip (13).

A lowerable closure according to claim 6, characterized in that the connecting link (25), which at one end is pivotally connected to the arm grip (13) by a bearing shaft (27), is fork-shaped at its other end and with its fork legs (29) encloses a shoulder (32) located on the projection (31) of the slider (22), providing a bearing pin (30) which penetrates the fork leg (29) and the shoulder (32) to form a pivot bearing between the connector (25) and the slider (22).