LOCKING DEVICE FOR VERTICAL SLIDING GATES AND SIMILAR

Abstract: Locking device for vertically movable sliding gates and similar mounted in a gate frame. In the frame there is a lock mechanism comprising a locking bar (1) for locking engagement with the gate (8), said locking bar being journalled on a bearing for rotating movement between a locking and an unlocking position, a pawl (3) for optionally blocking the locking bar in its locking position and a cam plate (2) which feels whether the gate is open or closed and is adapted to detain the blocking action of the pawl (3) as long as the gate is open. The purpose of this is to avoid damage on the lock by attempts to close the gate when the locking bar (1) is blocked.

Description: Locking device for vertical sliding gates and similar The present invention relates to a locking device for ver¬ tical sliding gates and similar, comprising a rotatably jour- nalled locking bar and a pawl for blocking the locking bar in locking position. In locking devices of this type there has been the problem that when the pawl is in blocking engagement with the locking bar at the same time as the gate is open, the gate can not be closed without first releasing the pawl. The invention aims at solving this problem by means of a cam 0 member which is adapted to feel whether the gate is open or closed and to prevent the blocking of the locking bar as long as the gate is open. In this way is prevent-ed the damage caused on the lock by an attempt to close the gate -with a blocked locking bar. This is especially useful in connection 5 with gates where the locks are operated from a panel remote from the gate. Closer details of the invention appear from the following description of an embodiment of the invention and the annexed drawings showing: _ 0 Fig. 1 , a section of the lock parallel to the plane of the gate, the lock being in unblocked state. ,,— ,JE_ig».»2_ f ._±he.__3ame. section of the lock in blocked state. The locking mechanism is situated in the frame of the gate. It comprises a locking bar 1 , a cam member or cam plate 2 and 5 a paw " l"3 The locking bar 1 is joumalled on a lug 11 between a.protruding position in which a protruding part of the bar : is adapted to engage a recess 9 in the gate 8 and a retracted position in which the locking bar lies wholly within. the frame and does not engage the recess 9 » thus leaving the gate l0 8 unlocked. The cam member 2 is joumalled on the same lug 10 and is also movable between a protruding position and a "" retracted position. The pawl 3 s movable on a lug 10 between a raised position in Fig. 1 and a lowered position in Fig. 2. When the cam member 2 takes its protruding position in Fig. 1 5" it holds -the pawl 3 i n its raised position-r — —— - • •• •- When the gate 8 is lowered vertically from above towards its closed position, the locking bar 1 is urged against th biasing action of the spring 12 by a wedging action of the lower edge of the gate towards the retracted position of 5 the locking bar by rotation on the lug 11. During this mov ment the locking bar engages a lug on the cam member 2, that the latter is brought towards its retrapted position by rotation on the same lug 11 against the biasing action of the spring 13. When the gate has reached its bottom pos 10 tion the locking bar 1..snaps into the recess 9 in the edge of the gate under the action of the spring 12. The cam mem 2 is retained in its retracted position by the edge of the gate against the action of the spring 13. When the cam mem : ber 2 thus is brought to its retracted position in Fig. 2. 15 the pawl 3 is released and moves down by its own weight, o alternatively by a spring (not shown) , into engagement: wit - a.recess in the locking bar blocking the latter in its pro position truding/and also locking the gate in its closed position. The pawl 3 is remote-controlled by an electromagnet 5 > whi 20 in actuated state pulls the pawl 3 upwards and: releases th locking;bar 1. Now the gate is free to be opened.,. _and duri the opening movement the lower side of the recess 9_ engage _ the protruding portion of the locking bar, swinging the ba on the lug 11 into its retracted position. The rotatable 25 bearing permits the cooperating surfaces on the bar 1 and in the recess 9 to be orientated perpendicularly to the di rection in which the gate moves, which is preferable for o taining a reliable locking. From the said follows that the locking bar is adapted to be wedged inwards by the movemen 30 of the gate in both directions, as long as the bar 1 is no blocked by the pawl 3. The general function of the cam plate 2 is to detect wheth the gate is closed or open and it serves in this connectio - the purpose to prevent the pawl 3 from blocking the lockin 35 bar 1 as long as the gate is open. It should in other word always be possible to close an open gate irrespective of whether the electroiπgnet 5 has been switched off for putti the pawl 3 into blocking position. If the gate is open the cam plate 2 is held in its protruding position by the spring 13. In this position the cam plate 2 holds the pawl ' '■ 3 raised, so that even if the magnet 5 is switched off,the pawl 3 does not move down to its blocking position. The blocking of the locking bar 1 initiated by the magnet 5 . <- while the_ga<tie is still open is thus detained by the cam plate 2 till the gate has been'closed. This makes it pos¬ sible always to close an open gate without checking whether the locking bar is blocked or not, which is especially use; ful in connection with gates having a remote control. For establishing a remote control the pawl 3 is provided with a mercury switch or similar sensor 6, which is connec¬ ted to an indicating device on a panel for remote control and shows whwther the pawl 3 is in blocking or releasing position. Also the cam plate 2 is provided with a similar sensor, for instance a mercury switch 7 » indicating whether the gate is closed or open. In this way several gates can be controlled from a central panel indicating whether the gates are open or shut and whether they are locked or un- locked. OMPI

Claims: Claims __ 1. Locking device for vertically moving sliding gates and similar mounted ' in a gate rame, said frame having a lock mechanism including a movable locking bar for locking engagement with the gate, said locking bar being joumalle ~ on a bearing for rotating movement between a locking and a * unlocking position, a pawl for optionally blocking said locking bar in its locking position, characterized in that a cam member (2) is adapted to detect whether the gate is open or closed and also adapted to engage said pawl (3) fo detaining the latter from blocking the locking bar (1) whe the gate is open. 2. Locking device as defined in claim 1 , characterized in that the pawl (3) is controlled by an electromagnet (5) fo optional setting to blocking or releasing position. 5 3. Locking device as defined in any of the preceding claim characterized in that the pawl (3) is provided with a sens (6) , for instance a mercury switch, for remote indication of whether the pawl (3) is in blocking or releasing posi¬ tion. 0 *•• Locking device as defined in any of the preceding-claim characterized in that the cam member (2) is provided with sensor (7) > for instance a mercury switch, for remote con¬ trol of whether the gate is open or closed.

Inventors: STENDAL K
Applicants: STENDAL K, STENDALS ELEKTRISKA AB
Application year: 1979
Main classification: E05B47
IPC codes: E05B41, E05B45, E05B47, E05B65