EP4219869A1 - Automatic lock - Google Patents

Abstract

The invention relates to an automatic lock comprising a housing (1) with a forend plate (2), a spring-loaded latch (3), a bolt (5) which can be actuated by a push rod (4) and a locking plate which interacts perpendicularly to the forend plate (2). the force of a spring (6) displaceable release element (7), which in the zero position protrudes with a retaining projection (8) into the movement path of the push rod (4) and blocks it in the unlocked position. The release element (7) is constructed in two parts and comprises a release wedge (9) which protrudes through the forend plate (2) in the zero position and a bearing part (10) which is mounted in the housing and carries the retaining projection (8), the release element (7) being between a functional position and a maintenance position, and wherein a spring-loaded safety element (11) is provided in the housing (1), which against the force of a spring (12) parallel to the forend plate (2), for example by means of a lever tool that can be inserted through the forend plate (2), is displaceable and in the functional position protrudes with a section into the movement path of the bearing part (10) and thus secures the triggering element (7) in the functional position.

Description

technical field

The invention relates to an automatic lock comprising a housing with a forend plate, a spring-loaded latch, a bolt that can be actuated by a connecting rod and a triggering element that interacts with a striking plate and can be displaced normal to the forend plate against the force of a spring, which in the zero position has a retaining projection in the movement path of the connecting rod protrudes and blocks it in the unlocked position.

State of the art

Such an automatic lock is, for example, in DE 19626745 C shown. In such a lock, when the lock hits the opposite locking plate in the frame, both the latch and the triggering element are pushed into the lock via a ramp through the locking plate. As a result, the push rod is released and when the wing is completely closed, the latch, the bolt and possibly also the triggering element can dip into corresponding recesses in the strike plate, whereby the door is locked. The lock mechanism for actuating the bolt can be designed in different ways, so that it can be unlocked again, for example, via a lock cylinder, a drive or a handle attached to the nut.

The disadvantage of the known automatic locks is that the release element cannot be adapted to the respective gap in the forend area, or can only be adapted with great effort. A correspondingly complex lock mechanism as well as specially matched locking pieces or locking plates with corresponding recesses are also required for most triggering elements.

Brief description of the invention

The object of the present invention is to eliminate these disadvantages and to create an automatic lock in which the release unit is made up of as few components as possible, the release element can be adjusted to different gap widths in the forend, and in which standard strikers or striking plates can also be used.

This object is achieved according to the invention in that the triggering element is constructed in two parts and comprises a triggering wedge that protrudes through the forend plate in the zero position and a bearing part that is mounted in the housing and carries the retaining projection, with the triggering element being displaceable between a functional position and a maintenance position, and with a spring-loaded safety element is provided, which can be displaced parallel to the forend plate against the force of a spring, for example by means of a lever tool that can be inserted through the forend plate, and which in the functional position protrudes with a section into the movement path of the bearing part and thus secures the triggering element in the functional position.

The release element is preloaded by a spring in the direction of the forend plate. In the functional position, the movement of the triggering element is limited by a section of the securing element, so that only the triggering wedge protrudes from the forend plate. When the door is closed, this release wedge runs onto the striking plate or striker piece and is pushed further into the housing against the force of the spring. As a result, the retaining projection disengages from the push rod and releases it for the locking process.

In order to set the triggering element with regard to the gap width of the forend, a lever tool, for example a screwdriver or a special key, is inserted into an opening in the forend plate when the door leaf is open and the securing element is thus displaced parallel to the forend plate, for example upwards, against the force of its spring. As a result, the section of the securing element disengages from the triggering element and this is pushed outwards beyond the functional position into the maintenance position by its associated spring. In the maintenance position, the distance between can now due to the two-part structure of the trigger element Release wedge and storage part can be adjusted. After the setting has been made, the release element is simply pushed back into the housing in the direction of the functional position using the release wedge. As soon as the release element has been pushed far enough into the housing, the spring of the safety element pushes it back down and the release element is again secured in the functional position.

It is a further preferred feature that the release wedge is screwed into the bearing part via a thread, as a result of which the distance between the tip of the release wedge and the bearing part can be adjusted. This represents a particularly simple way of connecting the release wedge to the bearing part and at the same time providing an adjustment option for the two parts relative to one another. Depending on the number of turns of the release wedge, the thread in the bearing part can be screwed in further or less.

According to a further preferred feature, it is provided that the release wedge and the associated through-opening in the forend plate of the housing have a cross-section that deviates from circular. This prevents a set distance between the release wedge and the bearing part from slowly changing over time, for example as a result of vibrations that occur. Through the use of the lock, as well as when the door is slammed, there are repeated vibrations in the lock, which in the case of a tripping wedge with a circular cross-section could lead to the latter slowly twisting. Due to the fact that both the release wedge and its passage opening in the forend plate do not have a circular cross-section, the release wedge cannot be rotated in the functional position, but only in the maintenance position. Here it is important to ensure that, depending on the cross-sectional shape, the release wedge can then only be pushed back into the functional position in the respectively provided rotated positions, for example every 60°, 90° or 180°.

With regard to a preferred variant of the automatic lock, it is also a feature that a changeover lever is provided for actuating the latch via a locking cylinder or via a drive, and that the bolt has a peripheral recess in which a push-back protection element that can be displaced parallel to the forend plate comes to rest when the bolt is pushed out, with both the changeover lever, the push rod and an upper plate of the housing having guide receptacles running parallel to the forend plate, in which the push-back protection element is guided, so that it is floating between the change lever and the upper plate. The automatically extending bolt when the automatic lock is triggered is secured against undesired pressing in by a push-back safety device, which is floating between the change lever and the upper plate and protrudes through the push rod. This represents a particularly simple and cost-effective construction, by means of which the anti-back pressure device can be implemented with just a single element.

Brief description of the drawing figures

• Fig. 1 eine perspektivische Detailansicht eines erfindungsgemäßen Automatikschlosses im Bereich des Auslöseelements mit offenem Gehäuse und ohne Schubstange in Funktionsstellung,
• Fig. 2 die Detailansicht aus Fig. 1 in Wartungsstellung,
• Fig. 3 die Detailansicht aus Fig. 1 in Funktionsstellung mit ausgelöstem Auslöseelement,
• Fig. 4 eine schematische Explosionsansicht eines erfindungsgemäßen Automatikschlosses,
• Fig. 5 eine schematische Seitenansicht eines erfindungsgemäßen Automatikschlosses mit durchsichtiger Schubstange in Ausgangsstellung,
• Fig. 6 die schematische Seitenansicht aus Fig. 4 in einer Zwischenstellung während des Auslösevorgangs,
• Fig. 7 die schematische Seitenansicht aus Fig. 4 in verriegelter Stellung und
• Fig. 8 die schematische Seitenansicht aus Fig. 4 mit der Schubstange in der obersten Position während des Entriegelungsvorgangs.

The invention is now described below using an exemplary embodiment and with the aid of the accompanying figures. show it

• 1 a perspective detailed view of an automatic lock according to the invention in the area of the triggering element with an open housing and without a push rod in the functional position,
• 2 the detail view 1 in maintenance position,
• 3 the detail view 1 in functional position with tripped release element,
• 4 a schematic exploded view of an automatic lock according to the invention,
• figure 5 a schematic side view of an automatic lock according to the invention with a transparent push rod in the initial position,
• 6 the schematic side view 4 in an intermediate position during the release process,
• 7 the schematic side view 4 in the locked position and
• 8 the schematic side view 4 with the push rod in the top position during the unlocking process.

Description of execution types

In the Figures 1 to 3 each perspective detail views of the release element 7 are shown in different lock positions. For a better view, the top plate 21 (see 4 ) of the housing 1 and the push rod 4 (see Figures 4 to 8 ) not drawn. In 1 one sees a portion of the housing 1 above the case 3, where the trigger element 7 is in the zero position. The zero position according to 1 and the release position when the release element 7 is pushed in according to FIG 3 are both functional positions, whereas in 2 the maintenance position is shown. The securing element 11 can be displaced in a guide in the housing 1 parallel to the forend plate 2 and is biased downwards by means of a spring 12 . In the functional position, a section of the securing element 11 protrudes into the movement path of the bearing part 10 of the triggering element 7. The triggering element 7 is constructed in two parts with a bearing part 10 which is prestressed in the direction of the forend plate 2 by means of a spring 6. The holding projection 8 for the connecting rod 4 and a threaded receptacle for the thread 13 of the release wedge 9 are located on the bearing part 10. This is screwed into the bearing part 10 and protrudes in the zero position, as shown in FIG 1 shown, the forend plate 2 through a corresponding passage opening 14 with a cross section corresponding to the release wedge 9 .

In order to adjust the release element, how far the release wedge 9 should protrude beyond the forend plate 2, the release wedge 9 must be rotated in its threaded receptacle in the bearing part 10. This is not possible due to the non-circular cross section of the release wedge 9 and the corresponding passage opening 14 in the functional position. To go to the maintenance position according to the 2 To access, the lock must first be triggered with the door open so that the push rod 4 is in the lower position. A tool is then inserted through an opening 22 in the forend plate 2 into an actuating recess 23 in the securing element 11 . By moving the lever up, the securing element 11 is against shifts the force of its spring 12 and thus releases the storage part 10 . By acting on the storage part 10 spring 6 this is now pushed further in the direction of the forend plate 2, whereby the release wedge 9 now protrudes further and can be rotated to adjust the distance between release wedge 9 and storage part 10. When the desired distance has been set, the triggering element 7 is pressed back into the housing, the securing element 11 is moved downwards again by its spring 12 and again holds the bearing part 10 in the zero position.

In the 4 the essential components of a possible embodiment of an automatic lock according to the invention are shown in a schematic exploded view. The individual components are accommodated in a housing 1, the housing 1 having a removable top plate 21 on one side and a forend plate 2 on the forend-side end face. The triggering element 7 , consisting of the triggering wedge 9 and the bearing part 10 with the retaining projection 8 , and the securing element 11 with the actuating recess 23 which is prestressed by the spring 12 is accommodated in the upper region of the housing 1 in the figure.

Immediately below there is a latch 3 which is also preloaded by means of a spring. The latch 3 is actuated via a latch retraction lever 26 which is arranged underneath and which is connected in an articulated manner to a change lever 15 . The changeover lever 15 can be actuated via a nut 27. Alternatively, the changeover lever 15 can also be actuated via a drive or a lock cylinder. A changeover slide 24 which is articulated to the changeover lever 15 and is coupled to a tumbler slide 25 is provided for actuation by means of a lock cylinder. Depending on the rotation of the lock cylinder, the tumbler slide 25 moves the changeover slide 24 into the movement path of the locking lug or vice versa. As a result, the changeover lever 15 and thus the case retraction lever 26 can also be raised or rotated via the locking lug. If the tumbler slide 25 the exchange slide 24 from the path of movement the locking lug has moved out, the tip of the tumbler slide 25 engages in a recess in the push rod 4 and blocks it. This represents an additional burglary protection.

The bolt 5 is also biased towards its locked position by means of a spring. It is actuated by a push rod 4 placed between the other elements and the top plate 21 . The push rod 4 is also coupled to the changeover lever 15 and tends to assume the lowest possible position by its own weight. To unlock and secure the bolt 5 in the unlocked position, a bolt retraction lever 29 that can be actuated via the push rod 4 and a holding lever 28 that is also controlled by the push rod 4 are provided.

A push-back safety element 17 is provided as a push-back safeguard for the pushed-out bolt 5 in the locked position, which element engages in a recess 16 on the edge of the bolt 5 . The push-back safety element 17 is guided and mounted in a floating manner in a corresponding guide receptacle 18 in the changeover lever 15 and a further guide receptacle 19 in the connecting rod and a guide receptacle 20 in the upper plate 21.

The individual lock positions during the locking and unlocking process are shown schematically in the Figures 5 to 8 shown. In the schematic side views, the push rod 4 is shown transparent in each case, so that the elements lying underneath are still visible with dashed lines.

figure 5 shows the zero position of the automatic lock when the door is open. The release element 7 holds the push rod 4 in the upper position with the retaining projection 8 . The bolt 5 is secured in its unlocked position by the retaining lever 28 .

If the latch 3 and the release wedge 9 of the release element 7 strike the striker or striking plate when the door is closed, they are pushed inwards into the housing 1 . As a result, the holding projection 8 first disengages from the push rod 4 and this begins to move downwards under its own weight. So that the bolt 5 is not pushed out prematurely before the lock is fully immersed in the striking plate, the push rod 4 is held by the pushed-back latch 3 with a further projection 30 ( 6 ). Only when the latch 3 is received in its corresponding recess in the closing piece can the connecting rod 4 continue its downward movement.

In the 7 shows the locked position. On the further way down, the push rod 4 first actuates the holding lever 28, as a result of which the bolt 5 is now also released and is pushed out of the housing 1 by its spring. After the bolt 5 has been fully pushed out and the push rod 4 is in the lowest position, the push-back safety element 17 can also dip into the recess 16 on the edge of the bolt 5 due to gravity and thus secure it in the locked position. The push rod 4 acts at the same time as the projection 30 in the area of the latch 3 as a push-back safeguard for the latter.

In the 8 the unlocking process is shown, with the push rod 4 being in the uppermost position here. If the unlocking process is carried out by a lock cylinder, the locking lug 25 is moved to the right position in the drawing by rotating the locking lug, and the blocking of the connecting rod 4 is thus released. The interchangeable slide 24 coupled to the tumbler slide 25 thus reaches the movement path of the locking lug with its free end and can be lifted with the next rotation. As a result, the push rod 4 is set in an upward movement via the changeover lever 15 . This, in turn, first lifts the push-back safety element 17 out of the edge recess 16 of the bolt 5 and then the bolt 5 is drawn in via the bolt retraction lever 29, which is also actuated by the push rod 4, and then secured by the retaining lever 28 dipping in again. Furthermore, the latch 3 is pulled back via the latch retraction lever 26 . After the push rod 4 has reached the zero position again by briefly pressing back the retaining projection 8, the unlocking process is complete. At the When the push rod 4 is lowered, it is held back again by the retaining projection 8 and the lock remains unlocked until the door is closed again.

If the lock structure has an electric drive instead of a lock cylinder, the tumbler slide 25 and the changeover slide 24 can also be omitted and the drive can be coupled directly to the changeover lever 15 .

Claims (4)

Automatic lock comprising a housing (1) with a forend plate (2), a spring-loaded latch (3), a bolt (5) which can be actuated by a connecting rod (4) and a locking plate which interacts normal to the forend plate (2) against the force of a spring (6) displaceable release element (7), which in the zero position protrudes with a retaining projection (8) into the movement path of the push rod (4) and blocks it in the unlocked position, characterized in that the release element (7) is constructed in two parts and has an in zero position through the forend plate (2) protruding release wedge (9) and a bearing part (10) mounted in the housing and carrying the retaining projection (8), wherein the release element (7) can be displaced between a functional position and a maintenance position, and wherein in the housing (1st ) a spring-loaded safety element (11) is provided, which can be displaced parallel to the forend plate (2) against the force of a spring (12), for example by means of a lever tool that can be inserted through the forend plate (2), and in the functional position with a section in the Movement path of the storage part (10) protrudes and the triggering element (7) secures it in the functional position. Automatic lock according to Claim 1, characterized in that the release wedge (9) is screwed into the bearing part (10) via a thread (13), whereby the distance between the tip of the release wedge (9) and the bearing part (10) can be adjusted. Automatic lock according to Claim 1 or 2, characterized in that the release wedge (9) and the associated through-opening (14) in the forend plate (2) of the housing (1) have a cross-section which differs from circular. Automatic lock according to one of Claims 1 to 3, characterized in that a changeover lever (15) is provided for actuating the latch (3) via a lock cylinder or via a drive, and that the bolt (5) has a recess (16) on the edge , in which a push-back safety element (17) that can be displaced parallel to the forend plate (2) comes to rest when the bolt (5) is pushed out, with both the changeover lever (15), the push rod (4) and an upper plate (21) of the Housing parallel to the forend plate (2) running guide receptacles (18,19,20) in which the push-back safety element (17) is guided so that it is floating between the changeover lever (15) and the top plate (21).

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