EP0431369A2 - Mortise lock with latch bolt - Google Patents

Abstract

A mortise lock for doors or the like. is provided with a latch bolt under the action of a latch spring (6), which, when the door leaf is open, protrudes through an interlocking element (10 '') in an only partially extended, only with its front bevel (4 ') over the lock forend (3) ') is to be locked, which can be disengaged by the striking plate-side impact of a cuff-side protruding trigger (10) arranged in the area of the locking surface (4 <V>) of the latch bolt (4), thereby allowing the latch bolt (4) to reach its full extended position. In order to create a mortise lock of the aforementioned type which, with an even simpler construction of the locking element and trigger mechanism, has an arrangement of the trigger (10) and the locking element (10 '' ') which is protected against unintentional actuation when the door is open, and at the same time It remains ensured that the trigger (10) only releases the latch bolt for its full extension movement after the closed position of the door has been reliably reached, the trigger (10) is pivotally supported in the latch bolt and is protected by a locking lug (10 ''') Mistake.

Description

The invention relates to a mortise lock for doors or the like, with a latch bolt which acts under the action of a latch spring and which, when the door leaf is open, can be locked by a locking element in an intermediate position which is only partially extended and only protrudes with its front bevel protruding above the lock cuff. which is to be disengaged by the striking plate-side impact of a trigger projecting in the area of the locking surface of the latch bolt and thereby allowing the latch bolt to reach its full extended position.

A mortise lock of the above type is known from US-PS 39 12 309. It has in common with conventional mortise locks that its latch bolt in the door open position only protrudes from the lock faceplate with its front run-up bevel, but offers the latter the advantage that the latch bolt automatically moves deeper into the striker plate on the door frame side, which means that it already runs through this deep closing engagement a greater security against break-in of the door is achieved. Also, the latch bolt in its fully extended locking position, in which its run-up slope completely disappears in the striking plate, cannot be caused by unauthorized insertion of a sufficiently firm counter status, such as a flexible sheet, screwdriver or check card, are moved back into the door gap between the door lock and striking plate, as is easily possible with simple latch locks. In the known latchbolt mortise lock, the locking element which allows the latchbolt to be locked in its partially extended intermediate position is designed as a spring pawl loosely mounted in a recess in the latchbolt, while the trigger is designed as an axially parallel to the latter release slide which is adjustable on the blocking surface side of the latchbolt , which is provided with an inclined ramp surface locking recess for the pawl engaging therein in the door open position. When the latch bolt snaps into the strike plate opening, the trigger slide is held back by the strike plate, causing the pawl to slide up on the inclined surface of the lock recess of the trigger slide, thereby releasing the latch bolt for its full extension movement. The two-part design of the locking element and release slide is structurally complex. In addition, the position of the trigger slide on the latch bolt accessible from the front has the disadvantage that the trigger slide can be easily actuated on the face side and thus adjusted when the door is open, as a result of which the latch bolt can unintentionally move out into its full extended position. This can lead to considerable damage if the door is slammed carelessly. In addition, the above-described malfunction possibility prevents such a lock from being used in fire doors, for example. The same disadvantages also have other type of latch bolt mortise locks known from DE-OS 32 41 273, in which the locking element allowing the latch bolt to be locked in its partially extended intermediate position and its trigger are stored below the latch bolt in the lock case, the trigger is formed as a protruding auxiliary latch between the latch bolt and an additional key-operated latch bolt. A further disadvantage here is that the latch bolt has already been released for its full extension movement by the trigger and the locking element is when the trigger has been pressed in by the striking plate, but the latch bolt has not yet been inserted into the striking plate perforation, for example when the door leaf is not yet fully pressed into the closing position. If the door were then pushed open again, the latch bolt would again be in its fully extended position when the door was open.

The invention has for its object to provide a mortise with latch bolt of the type mentioned, which does not have the aforementioned shortcomings, rather with an even simpler structure of the locking elements and trigger mechanism, a more protected against unwanted operation with open door arrangement of the trigger and Has locking element and in which, as with the same type mortise lock, it is also ensured that the trigger only releases the latch bolt for its full extension movement after the closed position of the door has been reliably reached.

This object is achieved according to the invention in a generic mortise lock in that the trigger is pivotally mounted in a protected manner in the latch bolt and is provided with a locking lug which also forms the locking element.

In this way, the standardization of the locking element and trigger not only leads to a significant structural simplification of the lock, but it is ensured by the protected pivotable accommodation of the trigger and the locking lug in the latch bolt itself that the trigger lug with the trigger lug only slightly out of the locking area The release lever protruding from the latch bolt head is practically neither visible nor can it be operated unintentionally in the door open position, especially if it is - as is usually the case - rebated doors, where the trigger nose between the projecting door rebate and the semi-protruding latch bolt in itself for a mere finger operation is practically inaccessible. Otherwise it remains ensured that the The trigger and the locking lug on it only release the latch bolt for its full extension movement when the free end of the latch bolt is already snapped into the striking plate opening, so that the latch bolt can actually extend fully into its locking position.

The trigger is advantageously designed as a double-armed trigger lever which is pivotally mounted in a horizontally continuous recess of the latch bolt head about an axis extending transversely thereto and which has at its front end located at the level of the run-up slope one which projects above the locking surface of the latch bolt head with the associated inner wall side of the Strike plate entry opening interacting trigger nose and at a short distance behind it has the locking lug engaging behind the lock face plate, while at the rear end of the release lever laterally offset from its pivot axis, the latch spring which seeks to press both the latch bolt in the extended position and the release lever in the locked position attacks. This results in an extremely simple lock design, especially since the latch spring also serves as a return spring for the release lever.

According to a further feature of the invention, the latch bolt can be partially or completely retracted by conventional lever actuation, for which purpose a swivel plate to be actuated by the former, which is operated by a return spring and the latch bolt, is provided, which with one in all positions of the latch bolt on it Shaft engaging driving nose is provided.

In addition to its partially and fully extendable latch bolt, the new latch bolt mortise lock can advantageously be provided with an additional, key-operated bolt bolt, whereby, according to a further feature of the invention, the bolt bolt is articulated with the bolt bolt trying to push it into the extended position and has a corresponding spring action is which is to be locked in the retracted position of the lock bolt by a locking slide engaging at its other lever arm end, the latter being disengaged by the released latch bolt which extends further from its intermediate position and thereby releases the lock bolt for its extension movement. In this way, the lock bolt can be automatically transferred into its locking position when the latch bolt extends further, whereby the operating and unlocking security of such a mortise lock is correspondingly increased. The lock bolt extends reliably even if you press the handle with the door closed without opening the door.

It is advisable to mount the locking slide below the latch bolt and to the side next to the upper arm of the bolt control lever, and to provide it with a laterally protruding locking arm that cooperates with a locking pin provided on the bolt control lever, as well as against it with a spring engaging spring to press the underside of the latch bolt, on which there is a control cam which projects downwards and which, when the latch bolt is released and moves into the fully extended position, moves the locking slide to its lower release position, in which its locking lug releases the locking bolt on the bolt control lever for unlocking it.

For the key-operated retraction of the lock bolt, the swivel plate is provided with a driving pin which rests on the correspondingly contoured circumference of the upper arm of the bolt control lever, by means of which the swivel plate can first be pivoted into a circumference which enables the latch bolt to partially retract into its intermediate position. The further swivel adjustment of the swivel plate necessary for the complete retraction of the latch bolt can then be carried out by a slide acting on it and acted upon by the locking mechanism of the lock, which returns to its starting position after the key has been removed and thereby releases the latch bolt again for its partially extended intermediate position.

In order to be able to return the extended lock bolt to its retracted position simply by actuating the handle, as is desired with panic locks, a control cam that can be swiveled into the orbit of the follower arm can be provided on the upper arm of the bolt control lever, so that the bolt control lever brings the lock bolt into its retracted position Locking position is pivoted.

Fig.1

das Einsteckschloß in teilweise geschnittener Seitenansicht bei geöffnetem Türflügel und dabei nur teilweise aus dem Schloßstulp herausragendem Fallenriegel,

Fig.2

einen Schnitt nach der Linie II-II der Fig.1,

Fig.3

eine der Fig.1 entsprechende Ansicht des Schlosses, jedoch bei geschlossenem Türflügel und dabei voll ausgefahrenem Fallenriegel und Schloßriegel, und

Fig.4

einen Schnitt nach der Linie IV-IV der Fig.3.

In the drawing, an advantageous embodiment of a mortise lock according to the invention with latch bolt is shown. Show

Fig. 1

the mortise lock in a partially sectioned side view with the door leaf open and the latch bolt only partially protruding from the lock face plate,

Fig. 2

2 shows a section along the line II-II of FIG. 1,

Fig. 3

a view corresponding to Fig.1 of the lock, but with the door closed and thereby fully extended latch bolt and lock bolt, and

Fig. 4

a section along the line IV-IV of Figure 3.

The mortise lock shown is provided with a lock case base 1, a lock cover 2 and a lock face plate 3, which is provided with corresponding through openings for the latch bolt 4 and the additionally present lock bolt 5.

The latch bolt 4 is under the action of the latch spring 6, which tries to push it into the extended position. The latch bolt 4 can be extended by the partial stroke h into the intermediate position shown in FIG. 1, corresponding to the door open position, in which it only protrudes from the lock face plate 3 with its run-up slope 4 '. But it can also in accordance with Figure 3 with the door wing completely closed reach the full extended position, i.e. they protrude from the lock faceplate 3 by the full stroke distance H, in which its run-up slope 4 'completely disappears into the entry opening 7' of the striking plate 7 struck on the frame, and between the striking plate 7 and the lock faceplate 3 it is already bolt-shaped Profiled head 4 '' is located so that the latch bolt cannot be pushed back into the door gap 7 '' by otherwise possible unauthorized insertion of a sufficiently rigid elastic object.

The latch bolt 4 is guided with its shaft 4 '' 'on the built-in in the lock case, at the same time the abutment for the latch spring 6 installation 8 horizontally displaceable. It expediently consists of an essentially omega-shaped stamped and bent part with a molded plastic head 4 ''.

In a horizontally continuous recess 9 of the latch bolt head 4 ″, the double-armed trigger lever 10 is pivotally mounted about an axis extending transversely thereto. For this purpose, axle pins 10 'are provided on the release lever 10 on its upper and lower sides, which are supported in bearing eyes ₄ ^IV provided on the latch bolt. The trigger lever 10 has at its front, at the level of the run-up slope 4 'end of the latch bolt 4 a little above the locking surface ₄ ^V protruding nose 10'', which cooperates with the associated inner wall side of the striking plate entry opening 6'. A short distance behind the trigger nose 10 ″ is on the release lever 10 the locking nose 10 ″ ″, which engages behind the lock cuff 3 in the intermediate position of the latch bolt 4 shown in FIGS. 1 and 2 and thereby for the corresponding locking of the latch bolt therein position taken by him in the door opening position. At the opposite end of the trigger lever 10 to the pivot axis 10 'is offset axially by the dimension v the pin 10 ^IV , around which the latch spring 6 engages the trigger lever 10. As a result, the spring 6 tries to press both the latch bolt 4 in the extended position and the release lever 10 into the locking position shown in FIG. It is still out Release lever 10, which is preferably made of injection-molded plastic, a stop lug 10 ^{V is} provided which, in the fully extended position of the latch bolt 4 shown in FIG. 4, strikes against the inside of the lock cuff 3 in a noise-damping manner.

To actuate the latch bolt 4 as well as the latch bolt 3 if necessary, the follower nut 11 provided with a corresponding lever insertion opening 11 'is pivotably mounted in the lock case housing. It is under the action of the return spring 12, which the follower 11 strives to pivot with its actuating arm 11 ″ against the tubular stop bolt 13.

Between the latch bolt 4 and the follower 11, the swivel disk 14 is arranged, which is mounted on a hollow chip guard sleeve 15 which connects the lock case cover and the lock case bottom to one another. This swivel disc 14 has a driver nose 14 'which, in all positions of the latch bolt 4, bears against its driver cam 4 ^VI located on the underside of the shaft 4'''. The latch bolt 4 can be retracted into its retracted position allowing the door to be opened by pushing the lever latch 11 ″ and the swivel disk 14 by actuating the lever handle both from its fully extended position according to FIG. 3 and from its intermediate position according to FIG.

In order to also automatically bring the lock bolt 5 into its extended locking position when the latch bolt 4 is fully extended, the lock bolt is used to push the bolt into the extended position and, under the corresponding effect of a leg spring 16, a double-armed bolt control lever 17 is connected via the sliding joint 18. The bolt control lever 17 is designed as a double-armed lever which is movable about the lock 19-fixed axis 19. The leg spring 16 is wound around the axle pin 19, which is supported at one end on the hollow pin 13 and at the other end on a pin 17 'seated on the bolt control lever 17. The bolt control lever is on the sliding joint 18 against Provide the overlying arm with a locking bolt 17 ''. In the intermediate extension position of the latch bolt 4 shown in FIG. 1, this is gripped by the locking lug 20 ″ seated on the laterally protruding locking arm 20 ′ of a locking slide 20. The locking slide 20 is guided vertically displaceably by way of guide holes 21, 22 which penetrate the elongated holes 20 '''and which are fixedly arranged in the lock case housing, a spring 23, which is supported on the guide pin 22 and which provides the locking slide 20 against the underside of the latch bolt head 4''. tries to press. At the latter there is a control cam 4 ^{VII which} , when the latch bolt 4 is released by the release lever 10 and thus moves into its full extension position, moves the control slide 20 downwards, whereby its locking lug 20 '' lifts off the bolt 17 '' of the bolt control lever 17 and thereby Bolt control lever 17 unlocked so that it can pivot under the action of the spring 16 and thereby bring the lock bolt 5 into its extended position.

The swivel plate 14 is also provided with a driving pin 14 '' which rests on the correspondingly contoured circumference of the upper arm of the bolt control lever 17 and via which the swivel plate 14 when the lock bolt 5 is retracted into a position in which the latch bolt 4 partially retracts from its fully extended position in its intermediate position is to be pivoted to the extent possible. In order to also be able to bring the latch bolt 4 into its full retracted position from the locking mechanism, a slider 24 which can be acted upon by the latter is also provided, which can engage the swivel plate 14 and pivot it in full as when the trigger was actuated.

In order to be able to pivot the bolt control lever 17 into its locking position which brings the lock bolt 5 into the retracted position by simply pressing the lever, a correspondingly contoured control cam 17 '''is provided on the upper arm of the bolt control lever 17 to be swiveled into the orbit of the follower arm 11''. As can be seen immediately in Figure 3, this can be done by means of pushers actuation of the bolt control lever 17 pivoted accordingly and thereby the lock bolt 5 as well as the latch bolt 4 are brought back into its retracted position.

It is understood that the lock bolt 5 is secured in its extended position by a conventional tumbler, not shown. This tumbler can be lifted by the bolt control lever 17 during its initial trigger actuation movement, which initially performs a corresponding idle stroke with respect to the lock bolt 5.

Various changes are possible within the scope of the present invention. In principle, there is also the possibility of equipping the mortise lock with a conventional lock bolt 5, which can only be pre-locked and hollowed out via the locking cylinder to be inserted into the mortise opening 25. Furthermore, the lock bolt 5 can also be designed and controlled so that it has a particularly large extension stroke as in the case of DE-OS 38 25 457.

Claims (14)

Mortise lock for doors or the like, with a latch bolt (4) under the action of a latch spring (6), which, when the door leaf is open, is only partially extended, but only with its front bevel (4 ') over the lock forend (3) protruding intermediate position is to be locked by a locking element (10 '''), which can be disengaged by striking a striker on the side facing the faceplate, arranged in the area of the locking surface (₄ ^V ) of the latch bolt (4) and thereby releasing the latch bolt (4) to its full extent Extend position can be reached, characterized in that the trigger (10) in the latch bolt (4) is pivotally mounted protected and provided with a locking lug (10 ''') forming the locking element. Mortise lock according to claim 1, characterized net gekennzeich that the trigger (10) is designed as a horizontally running continuously, blocking surface side situated recess (9) of the latch bolt head (4 '') about a transversely thereto extending axis pivotably mounted, double-armed trigger levers (10) is at its front end, located at the level of the run-up slope (4 '), a release lug (10'') projecting beyond the locking surface (4 ^V ) of the latch bolt head (4'') and interacting with the associated inner wall side of the striking plate insertion opening (6') ) and at a short distance behind it the locking face (3) engaging behind the locking lug (10 '''), while at the rear end of the release lever (10) laterally offset to its pivot axis (10') which both the latch bolt (4) in the extended position as the latch spring (6), which is also trying to press the release lever (10) into the locked position, also acts. Mortise lock according to claim 2, characterized net gekennzeich that the release lever (10) oppositely disposed two on its top and bottom, in on the latch bolt (4) existing bearing eyes (₄ ^IV ) gripping axle journals (10 '). Mortise lock according to any one of claims 1 to 3, characterized by that, that the release lever (10) is made of molded plastic. Mortise lock according to any one of claims 1 to 4, as characterized by, that the release lever (10) (10 ''') located stop projection (10 ^V) is formed with a distance behind its locking nose is provided, which in the fully extended position of the latch bolt ( 4) on the inside of the lock faceplate (3). Mortise lock according to any one of claims 1 to 5, as by in that the latch bolt (4) is designed as a stamped and bent part with Plastic-molded head. Mortise lock according to one of claims 1 to 6 with a follower nut (11) which acts under the action of a return spring (12), characterized in that between the follower nut (11) and latch bolt (4) there is provided a swivel plate (14) which can be actuated by the former is provided with a catch nose (14 ') engaging in all positions of the latch bolt (4) on its shaft (4'''). Mortise lock according to claim 7, characterized in that the swivel disc (14) on a hollow, the lock case cover (2) and the lock case bottom is mounted chip protection liner (15) interconnecting (1). Mortise lock according to any one of claims 1 to 8, which is provided apart from its partially and fully extendable latch bolt (4) with an additional, key-lock bolt (5), characterized net gekennzeich to push that to the lock bolt (5) it in extended position seeking , under appropriate Fe The effect of standing, double-armed bolt control lever (17) is articulated, which is to be locked in the retracted position of the lock bolt by a locking slide (20) acting on the other end of its lever arm and the latter is to be disengaged by the released latch bolt (4), which extends further from its intermediate position and thereby releases the lock bolt (5) for its extension movement. Mortise lock according to claim 9, characterized net gekennzeich, that the locking slide (20) projecting laterally below the latch bolt (4) and mounted laterally next to the upper arm of the bolt control lever (17) adjustable in height and with a, an existing with the bolt control lever (17) locking bolt (17 '') cooperating locking lug (20 '') carrying locking arm (20 ') and to be pressed by a spring (23) engaging against the underside of the latch bolt (4), on which a downwardly projecting control cam ( 4 ^VII ) which, when the latch bolt (4) is released and extends further, shifts the locking slide (20) into its lower release position, in which its locking lug (20 '') the locking bolt (17 '') on the bolt control lever (17) for unlocking it releases. Mortise lock according to claim 9, characterized net gekennzeich that the swivel disc (14) resting with one at the correspondingly contoured circumference of the upper arm of the bolt control lever (17) driving pin (14 '') is provided, the means of which the pivot washer (14) in the key-retracting Lock bolt (5) is to be pivoted into a scope which enables the latch bolt (4) to be partially retracted from its fully extended position into its intermediate position. Mortise lock according to claim 11, characterized in that for the key-operated complete retraction of the latch bolt (4) the swivel disc (14) can be pivoted by a slide (24) acting on it and acted upon by the locking mechanism of the lock in the same way as when the handle is actuated. Mortise lock according to any one of claims 1 to 12, da d urch in that there is provided in the orbit of the Drückernußarms (11 '') such einzuschwenkender control cam (17 ''') on the upper arm of the bolt control lever (17), that the bolt control lever ( 17) can also be pivoted into the locking position bringing the lock bolt (5) into the retracted position by actuating the handle. Mortise lock according to claim 13, characterized in that a tumbler securing the lock bolt (5) in its extended position is to be lifted by the bolt control lever (17) during its initial, with respect to the lock bolt (5), first an idle stroke executing lever actuation movement.

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