WO1990004694A1

WO1990004694A1 - Automatic lock

Info

Publication number: WO1990004694A1
Application number: PCT/DE1989/000657
Authority: WO
Inventors: Freimut Schonert
Original assignee: Freimut Schonert
Priority date: 1988-10-19
Filing date: 1989-10-17
Publication date: 1990-05-03
Also published as: EP0439478A1; DE58905711D1; EP0439478B1

Abstract

An automatic lock, in particular a door lock, has a latch (2) and a locking bolt (3) which are lodged in a case (1), pass through holes in a faceplate (4) on the front side of said case and co-operate with a locking plate provided with corresponding recesses. A return device (5) moves the latch (2) in the direction of locking. The locking bolt (3) in automatically pushed out into its locked position when the lock slides into the locking plate.

Description

Automatically locking lock

State of the art

The invention is based on an automatically locking lock, in particular a door lock according to the type of the main claim. Locks of this type work together with a locking plate having corresponding recesses and are provided with a resetting device which acts on the latch in the closing direction. When the lock runs into the lock plate, the latch, which is provided with a beveled surface in the direction of addition, is pushed through the lock plate into the lock housing against the force of the restoring device. As soon as the recesses in the castle _. Covering the tulp and in the striking plate, the latch moves back out of the lock housing and into the striking plate due to the restoring force. As is known, the locking effect provided by the latch is not sufficient to secure against unauthorized opening of the lock. With the help of a flat, solid object, for example a check card, the latch can be pushed back into the lock and the door opened. Adequate security is only provided when the locking bolt is extended into the striking plate. Locks have therefore been developed. where the trap is secured against being pushed back. However, this solution has the disadvantage that the latch can be pressed out of the striking plate even by applying a small force to the door.

In a known automatically locking lock (DE-QS 32 41 273), therefore, either an additional bolt is provided or the latch is designed as a combined latch bolt. In the case of the combined latchbolt, the latch has a straight, bolt-like area following the beveled area which, when the lock is inserted into the striking plate, extends into the striking plate. Protection against pushing open the door is not sufficient here either. The provision of an additional latch is, on the other hand, relatively complex. since the striking plates and door frames must also be designed accordingly. All known automatically locking locks also work with an additional latch for actuating the release mechanism for locking the lock. This has the disadvantage that an adjustment is necessary so that the locking is not triggered too early. Such an adjustment is quite difficult and must be carried out again in each individual case, since the distance between the lock face plate and the lock plate can have large tolerances for different doors. This distance can change even after the lock has been installed, so that such a lock suddenly stops working.

Advantages of the invention

The automatically locking lock according to the invention with the characterizing features of the main claim has the advantage that no additional bolt is required, that a conventional locking plate can be used and that no changes need to be made in the frame, for example because of a further extending case. Characterized in that the locking bolt automatically extends into its locking division when the lock moves into the locking plate, the same protection is provided against pushing open the door as in the case of a lock locked by an arbitrarily operated locking bolt. On the other hand, the automatic locking according to the invention does not result in any disadvantages with regard to the normal operation of the lock. It can be used for locks with axially slidable locking bolts as well for locks with a rotatably mounted locking bolt, a so-called swivel bolt that moves into the locking plate by rotating it by 45 °.

According to an advantageous embodiment of the invention, a trigger mechanism for triggering the automatic opening of the locking bolt is provided, which can be actuated by the latch. This eliminates the need for an additional trap with all associated devices such as springs, recesses, etc.

According to an advantageous further development of these features, the trigger mechanism can be triggered when the latch is extended into the striking plate. This has the advantage that it is impossible for the locking bolt to be extended prematurely into the striking plate, that is to say before the lock has completely run into the striking plate. Adjustment of the lock after installation of the lock in., The door is therefore omitted.

According to a further embodiment of the invention, the locking bolt is loaded in the closing direction by a reset element and can be locked in its releasable position in the lock. In this way, a purely mechanical and thus inexpensive manufacture and retraction of the locking bolt is ensured, the locking of the locking bolt in its locked position preventing the locking bolt from moving out again immediately after the door is opened. According to a further embodiment of the invention, which is also claimed for itself and which relates to a lock with a lever follower engaging the latch in the opening direction, the locking bolt can be automatically retracted when the lever follower is turned in the opening direction. In such locks, the latch is used to open the door in the lock by means of the door handle or rotary knob provided on one side of the door. In the case of end doors such as front doors, a doorknob or a rotary knob is provided on the inside of the door, while only a fixed button or a handle is provided on the outside of the door. Due to the design according to the invention, the door can be opened from the inside by simply actuating the door handle or the rotary knob, despite the automatically locking lock, which is absolutely necessary, for example, in the case of escape doors.

According to an advantageous development of these features, the lever follower has an extension which actuates a lever device acting on the locking bolt which moves the locking bolt into its retracted position when the lever follower is rotated in the opening direction. In this way, the closing bolt can also be retracted purely mechanically and therefore inexpensively by turning the lever foot. The end of lever devices is common in locks, so that there are no constructive problems. According to a further advantageous embodiment of the invention, the locking bolt has a recess into which a latching element for locking the locking bolt can be locked in its retracted position.

According to an advantageous development of these features, an axially displaceably guided latching rod can be latched into the recess provided in the locking bolt and the rod is loaded in the latching direction by a reset element, the latching rod at its end facing away from the recess in the locking bolt is mounted in a path provided on the latch, through which the latching rod can be pulled out of the recess provided in the locking bolt against the force of the reset element when the latch is extended. When the latch is retracted and extended, the path provided on the latch shifts relative to the locking rod guided axially in the SchloQ. The track is shaped in such a way that the latching rod is lifted out of the recess when the latch is extended and, conversely, can snap into the recess when the latch is retracted.

According to an advantageous further development of these features, the end of the locking rod facing the hall has a rotatably articulated hook arm and a mechanical rocker is provided into which the hook can be hooked, with a lever arm which is rotatably mounted in the housing and whose free end has a roller with which the narrow side of the latch facing away from the locking bolt and having a corresponding profile cooperates as a rocker. The roller rolls in and out of the trap on the narrow side of the trap, the profile being designed such that the hooked-in locking bar is raised when the trap is extended and releases the locking bolt when a certain lifting height is reached. By means of the return spring provided on the latching rod, the roller is held on the track when the trap is moved back and forth.

According to an advantageous further development of these features, the latching rod can be hooked into the mechanical rocker with its hook arm when the latch is inserted into the lock. This ensures that the release mechanism for the locking bolt is armed by the entry of the lock into the striking plate.

According to a further advantageous embodiment of the invention for an automatically locking lock with a latch follower engaging the latch in the opening direction, the hook arm of the latching rod can be automatically released from the rocker when the latch follower is actuated. This ensures that when the door is opened with the help of the doorknob when the doorknob is released and the case thus extended, the locking bolt does not extend, since the latching rod is unhooked from the rocker and is therefore not lifted out of the recess in the locking bolt. The next time the door is closed, the lock can run back into the striking plate and the lock can be released. According to an advantageous further development of these features, a push rod is arranged on the handle follower which, when the handle follower is turned in the closing direction, unlatches the hook arm of the latching rod from the rocker.

According to a further advantageous embodiment of the invention, the hook arm of the latching rod can be unhooked from the rocker by means of a locking cylinder when the hall is actuated. This prevents the locking bolt from moving out again immediately after opening and preventing the lock from entering the locking plate again.

According to an advantageous development of these features, the profile of the narrow side of the latch facing away from the locking bolt has the shape of a jag, the flank of which faces the lock cuff is pulled lower than the flank pointing in the opposite direction. The end face of the hook arm of the latching rods is chamfered. This embodiment has the advantage that the latching rod hooked in when the lock is actuated by the lock can snap into the recess in the locking bolt when the hall is fully extended, as a result of which the lock is activated. The next time the lock Ein¬ running in the b ^'is chiieübiech However, by the tapered end face of the hook arm the Ein¬ raststaπge from the rocker unhooked, so DAT when retracting the case of the locking bolt is not yet initiated. Only when the complete Retracting the trap the roller is on the other side of the prong, the hook arm is properly hooked back in, so that when the case is extended into the striking plate the locking bolt is released and can extend into the striking plate.

According to a further advantageous embodiment of the invention, tumblers which are displaceably guided in the housing between two positions are provided in the area of the locking bolt and prevent the locking bolt from being retracted in one position while releasing the locking bolt in the other position. Such tumblers are known per se. They serve to prevent the extended locking bolt from being pressed back into the lock from outside by forceful intervention. When the locking bolt is extended, the tumblers block the end pin fixed to the locking bolt from moving back into the lock. When the lock is unlocked, the tumblers are moved into their release position by the driver stit t arranged on the lock cylinder. Since the locking bolt can usually be closed twice, at least two independent tumblers are also provided.

According to an advantageous further development of these features, the tumblers in the direction of their closed position are each relieved by a reset device. This ensures that the tumblers automatically move into their closed position when the locking bolt is extended. According to an advantageous further development of the two last-mentioned features for an automatically locking lock with a locking bar that can be automatically retracted when the handle follower is turned in the opening direction, the handle follower engages a lever which is mounted in the housing and which, when the printer nut is turned in the opening direction, holds the tumblers in their position releasing the return of the locking bolt.

All the features shown in the description, the following claims and the drawing can be essential to the invention both individually and in any combination with one another.

An exemplary embodiment of the subject matter of the invention is shown in the drawing and is described in more detail below. Show it:

1 shows a lock in the open position on the long side in the locking position with the locking bolt extended and the latch extended,

FIG. 2 shows a lock according to FIG. 1, which was opened by actuating the printer, with an engaged, activated locking bolt and a retracting latch, FIG. 3 shows a lock according to FIG. 1, which was opened by actuating the locking cylinder, with the locking bolt retracted, activated and the latch and extension extended

Fig. 4 shows a lock according to Fig. 1 with a retracted, armed lock bolt and retracted by running into the striking plate.

The lock shown in FIG. 1 has a latch 2 guided axially in a housing 1 and a locking bolt 3 likewise axially guided in the housing 1, both of which are each removed from the housing 1 by a recess in a lock faceplate 4 arranged on the end face of the housing 1 are extendable. The latch 2 is loaded in the closing direction by a spring 5, while in the opening direction on the latch 2 a nut 6 rotatably mounted in the housing 1 engages. The printer unit 6 is provided with an extension 7 which engages a lever device 8 which is rotatably mounted in the housing 1 and which engages with the locking bolt 3 via a link guide 10 on the other side of its axis of rotation 9. A spiral spring 12, which is supported on the housing 1 and which is prestressed in the extension direction of the shooting bar 3, engages on a shoulder 11 of the shooting bar 3. The SchlieGrie¬ gel 3 is on its case 2 facing the narrow side with a recess 13 and on its end facing away from the lock face plate 4 with a toothed rack 14. A snap-in rod 15 can be snapped into the recess 13, on which a return spring 16 biased in the snap-in direction engages and which on the other hand is provided with a rotatably articulated hook arm 17 which can be hooked into a mechanical rocker 18 arranged in the area of the latch 2. The mechanical rocker 18 has a lever arm 19 rotatably mounted in the housing 1, the free end of which is provided with a roller 20 arranged perpendicular to the lever arm 19, which cooperates with a prong 21 provided on the narrow side of the latch 2 which is averted from the locking bolt 3.

The toothed rack 14 of the locking bolt 3 is provided on its side facing away from the lock face plate 4 with an end pin 22 which interacts with teeth 23 and 24 of tumblers 25 and 26 which are displaceably mounted in the housing 1. The tumblers 25 and 26 are displaceably mounted in the housing 1 between a position which frees the path of the end pin 22 and a position which blocks the path of the end pin 22 and is loaded by the force of one spring 28 supported on the housing 1 in the direction of its closed position continuous On the axis of rotation 9 of the lever device 8, another lever 29 is rotatably mounted in the housing 1, on which the extension 7 engages the follower 6 and which in turn acts against the force of the springs 28 on the tumblers 25 and 26 by means of a link 27 in the opening direction. On the follower 6 eirie ^" push rod 30 is also arranged, the free End can be brought into engagement with the hook arm 17 of the locking rod 15. A further lever 32 is provided on the axis of rotation 9, which acts on the latch 2 in the opening direction and can be actuated by the locking bolt 3 by means of a link 33 articulated on the lever 32.

FIGS. 1 to 4 each show different locking situations. 1 shows the lock in its locked position, that is to say locked position, FIG. 2 shows the situation after actuating the follower 6 to open the door, that is when the latch 2 is extended, and FIG. 3 shows the situation after Opening the lock by means of a lock cylinder. The trap 2 is already completely out, the locking bolt 3 is armed. 4 shows the situation when the armed lock enters the striking plate. The latch 2 is already fully retracted and the latching rod 15 is hooked into the rocker 18 with its hook arm 17.

The lock shown and described works as follows:

In its position retracted into the striking plate, as shown in FIG. 1, that is to say when the door is locked, the lock can be opened in a conventional manner both from the outside and from the inside with the aid of a key. For this purpose, the key is inserted into a locking cylinder, not shown, which is provided in the housing 1 by a see recess 31 and is inserted into the housing 1 through a corresponding recess in the housing cover, not shown. By turning the key, the driver of the locking cylinder comes into engagement with the toothed rack 14, as a result of which the locking bolt 3 is inserted into the housing 1 against the force of the spring 12, the driver simultaneously locking the tumblers 25 and 26 one after the other against the force of the springs 28 shifts its open position releasing the end pin 22. After two complete rotations of the driver, the locking bolt 3 has completely moved into the housing 1. The latching rod 15 engages in the recess 13 provided in the locking bolt 3 and prevents the locking bolt 3 from being extended due to the force of the spring 12. The locking bolt 3 is retracted after the first rotation of the locking cylinder by the teeth 23, 24 of the tumblers 25, 26 prevented. By a further quarter turn of the driver, the latch 2 is moved into the housing 1 via a lever 32, so that the door can now be opened. Since the driver of the locking cylinder is still in engagement with the toothed rack 14 and holds the locking bolt 3 in place, the latch 2 can extend despite the hooked-in locking rod 15 without the locking bolt 3 also extending. The lock is now in the position shown in FIG. 3. When the door is open, the latch 2 is extended, while the locking bolt 3 is in its retracted position under tension of the spring 12 due to the rod 15 which has been re-engaged. waits. When the latch 2 is extended, the roller is located on the side of the prong 21 facing away from the lock face plate 4, so that the hooked-in locking rod 15 can snap into the recess 13 of the locking bolt 3. So that the locking bolt 3 is not already triggered when the latch 2 is retracted the next time the lock is inserted, the end face of the hook arm 1 / is bevelled and on the other hand the flank of the prong 21 facing away from the lock faceplate 4 pulled less far than the flank facing the lock face plate 4. As a result, the hook arm 1 / is not fully hooked into the rocker 1b and is unhooked when the hall 2 enters by the action of the roller ZU raised by the teeth 21 on the inclined end face. When the latch 2 is retracted further, the roller 20 runs down the flank of the prong 21 facing the lock face 4, and the hook arm 17 is hooked in again by the latch 2 acting, but this time completely, since the latching rod 15 in this position latch 2 can completely snap into the recess 13.

From the inside, the door can be opened as usual with the help of the door handle. For this purpose, the follower 6 is rotated in the opening direction, in the hig. 2 shown example counterclockwise. When turning the follower 6 in the direction of Of on the one hand, the case 2 against the return spring 5 and on the other hand over the hear- set 7 and the lever device 8 of the locking latch 3 retracted into the housing 1, the tumblers 25 and 26 being simultaneously displaced into their open position releasing the end pin 22 via the lever 29 and the link 27. When the follower 6 is turned back due to the force of the return spring 5, the rod 30 comes into engagement with the hook 17 of the latch rod 15, as a result of which it is unhooked from the rocker 18. The running up of the roller 20 on the flank of the prong 21 when the latch 2 is extended further therefore has no effect on the locking of the locking latch 3, so that it remains in its retracted position. The next time the lock enters the striking plate, when the latch 2 is retracted, the latch rod 15 is hooked back into the rocker 18 with its hook arm 17. As soon as the lock and striking plate are aligned, the latch 2 can extend into the striking plate, the hooked locking rod 15 is lifted out of the recess 13 of the locking bolt 3, so that it also extends into the striking plate due to the force of the spring 12. The lock is again in the locking position shown in FIG. 1.

In the case of a lock with a pivoting swivel bolt, the mode of operation is corresponding. Instead of the spiral spring 12, an axially guided spring with a stop is expediently used, which is biased in the closing direction when the swivel bolt is retracted. All the features shown in the description, according to the following claims and the drawing can be essential to the invention both individually and in any combination with one another.

List of reference numbers - 18-

Claims

Automatically locking lock, in particular door lock, with a latch and a locking bar, which are mounted in a housing with a lock faceplate provided on one end face, with outlet openings for the latch and locking latch, and which cooperate with a corresponding lock plate having recesses, and with a resetting device acting on the latch in the closing direction, characterized in that the locking bolt (3 ^{N is} automatically extended to its closed position when the lock enters the locking plate.

2. Automatically locking lock according to claim 1, so that a trigger mechanism for triggering the automatic extension of the locking bolt (3) is provided, which can be actuated by the latch (2).

3. Automatically locking lock according to claim 2, d a d u r c h g e k e n n z e i c h n e t that the trigger mechanism when the latch (2) is deployable in the striking plate can be triggered.

4. Automatically locking lock according to one of the preceding claims, that the locking bolt (3) is loaded in the closing direction by a restoring element and can be releasably locked in its position retracted into the lock.

5. Automatically locking lock according to claim 4, so that the locking bolt (3) is loaded by a helical spring (12) supported on the housing.

6. Automatically locking lock with a latch nut engaging the latch in the opening direction, in particular according to one of the preceding claims, characterized in that the latch bolt (3) can be automatically retracted in the opening direction when the latch nut (6) is turned.

7. An automatically locking lock according to claim 6, characterized in that the follower (6) has an extension (7) which actuates a lever device (8) engaging the locking bolt (3) which actuates the locking bolt (3) when the printer is rotated (6) in the opening direction in its retracted position.

8. Automatically locking lock according to one of claims 4 to 7, so that the locking bar (3) has a recess (13) into which a locking element for locking the locking bar (3) can be locked in its retracted position.

9. Automatically locking lock according to claim 8, characterized in that an axially displaceably guided in the housing Eiπ- locking rod (15) in the locking bolt (3) provided Vorge¬ seen Ausnehmuπg (13) and that the locking rod (15; in the locking direction by a restoring element is loaded and is supported at its end facing away from the recess (13) in the locking bolt (3) in a baffle guide provided on the latch, through which the locking rod (15 ^λ when the latch is extended (2 ^N against the force of the Reset element can be pulled out of the recess (13) provided in the locking bar 3).

10. Automatically locking lock according to claim 9, characterized in that the case (2) facing the end of the Einrast¬ rod (15) has a rotatably articulated hook arm (17) and that a mechanical rocker (18) is provided, into which the hook arm (17) can be hooked, whereby a lever arm (19) rotatably mounted in the housing (1), the free end of which has a roller (20), with the narrow side of the latch (2) facing away from the locking bolt (3) and having a corresponding profile as Rocker interacts, which raises and lowers the hooked-in locking rod (15) during the axial movement of the latch (2).

11. Automatically locking lock according to claim 10, d a d u r c h g e k e n n z e i c h n e t that the locking rod (15) with its hook arm (17) can be hooked into the mechanical rocker (18) when the latch (2) is retracted into the lock.

12. Automatically locking lock according to claim 10 or 11 with a DruckernuQ acting on the latch in the opening direction, characterized in that the hook arm (17 ^{v of} the latching rod (15 ^Λ when actuating the follower (6) can be automatically unhooked from the rocker (18) .

13. Automatically locking lock according to claim 12, characterized in that a push rod (30 ^{λ) is} arranged on the follower (6), the hook arm (17 of the latching rod (15 ^x from the rocker (18) upon rotation of the follower (6) in the closing direction ^ notches.

14. Automatically locking lock according to one of claims 10 to 14, so that when the latch (2) is actuated by means of a locking cylinder, the hook arm (17) of the latching rod (15) can be unhooked from the rocker (18).

15. Automatically locking lock according to claim 14, characterized in that the profile of the locking bolt (3) facing away from the narrow side of the latch (2) has the shape of a prong (21), the faceplate of the lock (4) facing down is pulled lower than the in the opposite direction. facing flank and that the end face of the hook arm (17) is beveled.

16. Automatically locking lock according to one of the preceding claims, dadurchge¬ indicates that in the region of the locking bolt (3) in the housing (1) between two positions slidably guided tumblers (25 and 26) are provided, which with a on the locking bolt ( 3) provided end pin (22) cooperate and in one position prevent the locking bolt (3) from being retracted, while in the other position they release the locking bolt (3).

17. Automatically locking lock according to claim 16, characterized in that the tumblers (25 and 26) are loaded towards their closed position by a reset device (28).

18. Automatically locking lock according to claim 16 or 17 and with the locking nut automatically retractable when the locking nut is turned in the opening direction, characterized in that the locking nut (6) engages on a rotatably mounted in the housing (1) lever (29) which when the handle follower (6) is rotated in the opening direction, the tumblers (25 and 26) are shifted into their position releasing the backward movement of the locking bolt (3).