DE9208528U1 - Mortise lock for a front door or apartment entrance door - Google Patents

Abstract

When the bolt (5) of a lock, including the lock cylinder (6) and the bolt drive, is accommodated in a case (12) of a mortise lock (2, 34, 35), such a mortise lock can be inserted, according to choice, into the lock case of the mortise lock, in order to obtain the desired bolt extension. An essential element is the case (12) of the mortise lock (2, 34, 35) with its three guide slots (18, 19, 20). Insofar as the locking bit (9) does not act directly on the bolt tail (15), a control part (32) can be interposed as a kind of lengthening piece. If the key is to execute two revolutions, it is proposed to use a lever (38) which is pivotably and displaceably mounted on the case (12) and on the bolt tail (15) and which, together with the bolt tail (15), forms a second recess for the repeated entry of the locking bit. <IMAGE>

Description

Applicant:

Gretsch-Unitas GmbH
Building fittings
Johann-Maus-Str. 3

7257 Ditzingen

P-am 3 15 1645 024 15.6.92

B/mr (92/26)

Title : Mortise lock for a front door or apartment entrance door

Description

The invention relates to a mortise lock for a house door or an apartment entrance door with a bolt and a latch that can be operated by means of a switch using a locking bit of a locking cylinder. If the door is not locked, it can be opened using a handle that pulls the latch back. However, in the case of apartment entrance doors or external doors in general, such a handle is usually only found on the inside. From the outside, the door must therefore be opened using the key, which is used on the one hand to operate the latch and on the other hand to pre-lock the bolt if it is inserted into the

-&iacgr;. Hi < &mdash; I

Turns in the opposite direction. There are designs where the bolt reaches the pre-locked end position with a single turn. Other designs require two turns of the key for this. Furthermore, there are different adjustment paths for the bolt in the designs where the bolt is fully pre-locked with a single turn of the key. For example, there are locks where the bolt can be pre-locked a maximum of 10 mm and others where it can be pre-locked a maximum of around 13 mm. The designs with two full key turns for the entire bolt path usually result in a total path of the bolt when pre-locked of 20 mm.

It is easy to see that a different lock design is required for each deadbolt closure. However, it is generally required that the so-called rear bolt dimension should remain as small as possible, i.e. the dimension between the center of the handle nut and the rear edge of the lock.

The task now is to design a mortise lock of the type mentioned at the beginning in such a way that versions with different bolt throws can be realized using as many identical parts as possible, whereby the rear bolt dimension should be as small as possible in each case.

To achieve this object, the invention proposes that the mortise lock according to the preamble of claim 1

according to the characterizing part of this claim
In a common design for all versions
Lock case can be used to install different units
in order to achieve the desired bolt exclusion. All these installation units have the same or at least a substantially similar housing, so that the receptacle in the lock case for all built-in locks
In particular, the housings of the various built-in locks can be used for all intended
variants must be the same. This also allows identical
Versions of the bolt and the locking cylinder or
profile cylinder. Of course, the housing of the built-in lock can be designed universally, so that
assemble different parts or some parts
The lock can also be equipped with at least one tumbler, which can be mounted at least
conventional tasks and therefore does not need to be explained in detail. It secures at least the two end positions of the bolt. In order to be able to use the key not only to close the bolt forwards and backwards, but also to operate the latch in a releasing sense, the
Built-in lock also provided with a change or something
so that a change of the mortise lock can be easily coupled to the built-in lock.

The locking cylinder is mounted in the usual way, whereby of course not only the housing of the built-in lock

a corresponding receptacle, but also on the box of the mortise lock or its cover each have a
appropriate breakthrough is provided.

A particularly preferred embodiment of the invention is characterized in that the housing of the built-in lock has several, at least substantially in its
Direction of displacement extending, arranged one above the other
guide slots, one of which
Guide slots a guide pin on the bolt tail
"One above the other" in this case means that when the lock is installed, one guide slot is located above the next. With one and the same built-in lock
it is sufficient to use only one of these
If there are three guide slots, you can use them to create three different
designs of the built-in lock. This
However, this does not exclude the possibility that in the case of one and the same
Built-in lock also uses two or all installation slots
Because the guide slots are located on a part that is stationary relative to the door, namely the housing of the built-in lock, they run at least essentially in
Direction of movement of the bolt, on which at least one guide pin engaging in a guide slot
As the name suggests, the
The guide slot and the guide pin together provide a guide for the bolt, especially for the inner or rear

Bolt end or bolt tail. In addition, the bolt can of course be guided as usual in the opening of the lock case or a sleeve supporting the lock case.

A further development of the invention results from claim The recesses mentioned there for engaging the tumbler are already known per se and therefore do not require any further explanation. The same also applies to the basic principle of adjusting the tumbler, in particular directly via the locking bit of the locking cylinder. In a further development of the invention, it is proposed that the bolt tail has a further open-edged recess on its underside for the entry of the locking bit when closing forwards and backwards. In this case, the locking bit therefore acts directly on the bolt or its tail, whereby in particular a rotation of the locking bit in an anti-clockwise direction results in the bolt being closed forwards and a rotation in the opposite direction results in the bolt being closed backwards. This is a design in which the key only makes a single rotation. The bolt stroke or extension is expediently more than 10 mm, for example around 13 mm. On the other hand, this lock is characterized by a particularly simple and therefore inexpensive construction.

A further development of this lock is characterized by a stop that protrudes transversely to the plane of the bolt tail, which, when the bolt is closed, enables the change

out of the range of movement of the locking bit. This ensures that when the locking bit is turned back, i.e. when the bolt is closed back, the locking bit does not run against the change, but enters the recess on the bolt tail and can thus take it with it in the opening direction.

Another embodiment of the invention is given in claim 7. It results in a larger bolt throw of, for example, around 20 mm. This is achieved with a single turn of the key, due to the use of an "extension" for the locking bit. The latter does not act directly on the bolt, but rather via the extension mentioned. The larger radius results in the larger stroke of the bolt. Of course, the extension or the control part that causes the extension cannot be rigidly attached to the bolt, but rather the necessary freedom of movement in the direction of rotation and feed must be ensured. However, these movement options must be limited. So that the force can be transferred from the locking bit to the bolt. The overall means provided for this are given in claim 7. Preferably, the web mentioned there is located between the bearing bolt of the control part and its holder for the locking bit. Because the bridge can be moved in an arched slot, it should have a curvature that corresponds to the shape of the arch. The shape and size of the arch are essentially determined by the flight circle of the locking bit. The arch runs

approximately concentric but at a distance from it.

It is particularly advantageous that the bearing bolt of the control part protrudes above its level and the protruding end forms a driver for the change when the bolt is pre-locked. The bearing bolt therefore takes on a second task, which simplifies and reduces the cost of the construction. When the control part is moved from the rear end of the guide slot to the front end, i.e. when the bolt is pre-locked, the bearing bolt also moves from the inside to the outside and takes the change with it, so that it is outside the range of movement of the locking bit when it is turned back. Only when the bolt has reached its release position does the change also return to its effective position and then the latch can be retracted by turning the key further in a re-locking direction over the change. The door can therefore be opened from the outside using the key. From the inside, the latch is usually pulled back using the handle, whose square mandrel is inserted into the square socket of a handle nut, with the usual links including a return spring being connected between this and the latch.

A further variant of the invention is described in claim 10. It corresponds to the embodiments used here in that the key can be turned twice by 360°

is turned to move the bolt from the ineffective retracted position to the maximum pre-locked locking position. After 360°, half the bolt stroke is reached and the key can be removed in this position too.

Because the locking bit has to engage with the bolt twice in this variant, a single recess on the underside of the bolt is not sufficient; instead, two recesses arranged one behind the other are required in the direction of advance of the bolt, with the locking bit first engaging in the first recess facing the bolt and then, on the second turn of the key, in the second recess associated with the bolt tail end. The second recess is, however, to a certain extent "adjustable", i.e. it only reaches its final shape and size after the bolt has been locked once. It is formed on the one hand by the bolt and on the other hand by the pivoting lever or its extension attachment. A sensible control system is provided for this purpose, which ensures that the locking bit finds the correct receptacle on each of the two turns and that all other functions of this lock also run correctly and in the intended order. For details, please refer to the description of the corresponding embodiment.

A further embodiment of the invention provides that the lower edge of the change when the bolt is retracted in the

The locking bit is in the range of motion of the locking bit, which rotates in the retracting direction, so that when the key is turned in the retracting direction, the latch can be automatically acted upon via the change. Furthermore, the change brought out of the range of motion of the locking bit when the bolt is closed is reset in a further development of the invention by the lock being further developed in accordance with the claim.

The invention is explained in more detail below with reference to the drawing. The drawing shows three embodiments of the invention. These show:

Figures 1

to 3 three different embodiments in

a top view of the partially

broken mortise lock;

Figures 4

and 5 the built-in lock of Figure 1 in the two

Extreme positions of the latch;

Figures 6 and 7 one of the figures 4 and 5 corresponding

Representation of the embodiment according to

Figure 2;

Figures 8

to 10 corresponding representations for the third

Embodiment according to Figure 3.

A built-in lock 2 is installed in a mortise lock 1, which is inserted into a corresponding pocket of a door, preferably a front door or apartment entrance door, and is held there by suitable known means. The lock is shown in detail in Figures 4 and 5. The mortise lock is equipped with a latch 3 and a handle nut 4. A handle is inserted into the latter in a known manner so that the latch can be pulled back via known intermediate links. A return spring returns this mechanism to its original position. In this respect, it is known state of the art.

The built-in lock 2 has a bolt 5 which can be locked in the direction of arrow 7 using a key (not shown) inserted into a locking cylinder 6 and can be locked back in the opposite direction if the key is turned in the opposite direction. In addition, the latch 3 can also be retracted in a known manner using the key and a change 8 by operating the key. If the key is turned in the direction of arrow 10, whereby the locking bit 9 of the locking cylinder 6 is also turned in the same direction, this leads to a locking movement of the bolt 5.

in the direction of arrow 7. A rotation in the opposite direction causes the bolt 5 to be retracted from the pre-locked position shown in Figure 4 into the retracted position shown in Figures 5 and 1. A further rotation against the arrow 10 causes the latch 3 to be retracted in the direction of arrow 11 starting from the position shown in Figures 1 and 5 via the change 8.

According to the invention, the housing 12 of the built-in lock 2 is inserted into the lock housing 13 and held therein by suitable means, for example by pins of the housing 12 engaging in openings in the lock housing 13, whereby the free pin ends can be riveted. A connection using screws or similar elements is also possible without any problem.

The housing 12 of the built-in lock 2 is also equipped with a holder 14 for the locking cylinder 6, which can also be held in the lock housing 13. The built-in lock also includes a bolt 5 with a bolt tail 15.

In the embodiment according to Figure 1, the locking bit acts directly on the bolt tail 15 according to, for example, Figure 5, whereby it also raises a tumbler 16 against the resistance of its loading spring 17 by the required amount.

According to Figures 4 and 5, the locking bit 9 passes through the

Outward stroke of the bolt 5 has a rotation angle of approximately 120°. This is sufficient to either fully advance or fully retract the bolt 5. In this embodiment, the key is therefore rotated by a maximum of 360°.

As can be clearly seen in Figure 4, for example, the housing of the built-in lock 2 is equipped with several guide slots 18, 19 and 20, arranged one above the other in the installed position, in all embodiments with three. In particular, it is provided that the upper guide slot 18 is a straight slot that extends in the sliding direction 7 of the bolt 5. The guide slot 19 is an angled slot with a straight slot part 21 that is parallel to the guide slot 18 and a rear, slanted slot part 22 that extends towards the guide slot 18. There is an arched guide slot 20 under the guide slot. It slopes slightly outwards at the front and, roughly speaking, runs concentrically to the trajectory of the locking bit 9.

In the embodiment of Figures 4 and 5, a guide pin 23 of the bolt tail 15 engages in the angled guide slot 19. When the bolt 5 is retracted, it is located at the transition from the straight slot part 21 to the slanted slot part 22. When the bolt is fully pre-locked, it is assigned to the left end of the straight slot part 21 (Figure 4).

On the latch tail 15 there are several open-edged recesses arranged one behind the other in the direction of displacement for the engagement of the tumbler 16. This is lifted when the locking bit 9 is swung up, for example from the rotational position shown in Figure 5, and this causes the latch 5 to be released in the direction of displacement. Opposite, on the underside of the latch tail 15, there is another open-edged recess 26 into which the locking bit enters as shown in Figure 5 when the latch is pre-locked and from which it exits again at the end of the pre-locking movement as shown in Figure 4. The pre-locking movement of the embodiment of Figures 1, 4 and 5 is preferably about 13 mm for one turn of the key.

A stop 27 protrudes transversely to the plane of the bolt tail, which can be a protrusion. When the bolt 5 is closed forwards, it presses against a rear edge 28 of the change 8 and takes it along in the locking direction 7. This ensures that when the bolt 5 is closed back, the locking bit can return to the starting position according to Figure 5 without being hindered by the change. In this position of the locking bit, the change is then back in an effective position, so that the latch 3 can be retracted via it with the help of a return rotational movement of the key.

In the embodiment of Figures 2,6 and 7, a

modified bolt is used. Its bolt pin engages in the uppermost guide slot 18. It is also equipped with an additional upper recess 29 with an open edge. Approximately opposite, on the bolt spindle 15, there is a slot 30 with an open edge towards the bottom, in which a bearing bolt 31 of a control part 32 is mounted so that it can rotate and slide to a limited extent. The control part 32 represents, in a way, an extension of the locking bit 9. It has on its lower side in Figure 6 a transversely projecting, arched web 33, the curvature of which corresponds to that of the guide slot 20 in the housing 12 of the built-in lock 2. When the bolt 5 is retracted, the web 33 is assigned to the right end of the guide slot 20 according to Figure 7, while according to Figure 6 it is located at the left end of the slot when the bolt is fully pre-locked after one turn of the key. Accordingly, the pre-locking of the bolt 5 also takes place in this variant by means of a single turn of the key. However, because the control part, as mentioned, extends the locking bit 9 to a certain extent, an angle of rotation of the locking bit 9 that corresponds to that according to Figures 4 and 5 leads to a forward movement of the bolt 5 by, for example, around 20 mm.

The control part 32 is designed like a fork at its free end, i.e. it has a receptacle 36 for the locking bit 9, which in a certain way corresponds to the open-edged recess 26 on the locking slot of the first variant (Figure 5).

In addition, the bearing bolt protrudes to the opposite side, i.e. upwards in Figure 6. This bolt part forms a driver for the change 8 when the bolt 5 is closed and it works in the same way as the stop 27 of the first embodiment. The change 8 can be reset in all embodiments with the help of a rear shoulder at the transition from the bolt 5 to the bolt tail 15 (Figure 3).

Insofar as details of the second and third variants are not explained, they correspond to those of the first embodiment. However, in order to make the different design of the various built-in locks clear, the built-in lock of the second variant (Figure 2) is designated 34 and that of the third embodiment is designated 35 (Figure 3).

In the third variant, the guide pin engaging in the straight first or upper guide slot 18 is extended upwards, i.e. towards the viewer, with a lever 38 pivotably mounted on this extension. On this there is a bolt 39 which engages in the middle guide slot 19. When the bolt 5 is retracted, it is assigned to the right end of the guide slot 19 or its slanted slot part 22 according to Figure 10. In addition, it engages in a short slanted slot 40 of the bolt tail 15. In the initial position of the bolt 5, the upper

Ends of the short oblique slot 40 and the oblique slot part 22 are congruent with one another, whereby according to Figure 10 the two oblique slots enclose an angle of approximately 90° that is open downwards.

If you turn the key 360° starting from Figure 10, half of the maximum bolt extension is reached (Figure 9). In the meantime, the locking bit 9 works together with the open-edged recess 26 of the bolt tail 15. Because at the same time the bolt 39 has passed through the slanted slot part 22 of the second guide slot 19, the bolt 39 was able to move downwards along the short slanted slot 40, i.e. the relative position of the mentioned parts according to Figure 9 is now reached.

The lever 38 has a downwardly projecting extension 41 at its rear end. During the first turn of the key, it has moved away from the cam 43, which limits the first open-edged recess 26 at the rear, thereby creating a second recess 44. With the help of this, the bolt 5 can be locked by the same amount again during a second turn of the key in the direction of arrow 10, so that the position according to Figure 8 is finally reached. During this, the guide pin 23 and the bolt 39 pass through the second half of the guide slot 18 or the straight slot part 21 of the guide slot 19.

All variants are characterized by a particularly small back bolt dimension of 45 (Figure 3). The housing 12 of the built-in lock can preferably be designed as a zinc die-cast part. With one and the same housing, as explained, different dimensions of the bolt throw can be achieved, whereby only the bolt itself, the tumbler and a control element need to be replaced. A whole series of parts are the same and this leads to efficient production and quick processing for the different requirements. The different parts can be easily replaced.

Claims (14)

Protection claims 1. Mortise lock for a house door or apartment entrance door, with a bolt (5) and a latch (3) which can be actuated via a switch (8) by means of a locking bit (9) of a locking cylinder (6), characterized in that the bolt (5) is slidably guided in a housing (12) of a built-in lock (2,34,35) mounted in the lock housing (13), which also has a receptacle (14) for the locking cylinder (6), the locking bit (9) acting directly or via an intermediate member (32) on the bolt tail (15), that the built-in lock has or accommodates a tumbler (16) which can be actuated by the locking bit (9) and a switch (8) for key operation of the latch (3). 2. Mortise lock according to claim 1, characterized in that the housing (12) of the built-in lock (2,34,35) has a plurality of guide slots (18,19,20) arranged one above the other, extending at least substantially in its direction of displacement, wherein a guide pin (23) on the bolt tail (15) engages in one of these guide slots. 3. Mortise lock according to claim 1 or 2, characterized in that the bolt tail (15) has several has open-edge recesses (24,25) for engagement of the tumbler (16) at least in the two end positions of the bolt (5). 4. Mortise lock according to claim 3, characterized in that the bolt tail (15) has on its underside a further recess (26) with an open edge for the entry of the locking bit (9) when locking forwards and backwards. 5. Mortise lock according to claim 4, characterized in that the locking bit (9) emerges from the further recess after a pre-locking movement of approximately 13 mm and the bolt can be fully pre-locked with a single turn of the key. 6. Mortise lock according to at least one of the preceding claims, characterized by a stop (27) projecting transversely to the plane of the bolt tail (15) which, when the bolt (5) is closed, brings the change (8) out of the range of movement of the locking bit (9). 7. Mortise lock according to at least one of claims 1 to 3, characterized in that a control part (32) is mounted on the underside of the latch tail (15) so as to be rotatable and slidable transversely to the direction of movement of the bolt (5), which forms an extension for the locking bit (9), the control part (32) being connected by means of a transverse protruding web (33) is mounted in one (20) of the guide slots, which has an arcuate shape, that the control part for the rotatable and sliding mounting carries a bearing pin (31) projecting forwards, which engages in a slot (30) of the bolt tail (15) that is open at the bottom, and that the control part (32) carries a receptacle (36) for the locking bit (9) at its free end pointing towards the locking cylinder. 8. Mortise lock according to claim 7, characterized in that the bearing bolt (31) of the control part (32) protrudes above its plane and the protruding end forms a driver for the change (8) when the bolt (5) is pre-locked. 9. Mortise lock according to claim 7 or 8, characterized in that the locking bit (9) emerges from the receptacle (36) of the control part (32) after a pre-locking movement of approximately 20 mm and the bolt (5) can be fully pre-locked with a single turn of the key. 10. Mortise lock according to at least one of claims 1 to 4, characterized in that the guide pin (23) engaging in one of the guide slots, namely a first guide slot (18), is extended and a lever (38) is pivotally mounted on this extension, which has a guide pin (23) engaging in a second guide slot (19). engaging bolt (39), whereby it passes through a short oblique slot (40) of the bolt tail (15), and that the lever (38) carries at its rear end an extension projection (41) which, when the bolt (5) is half-closed, forms the rear end of a second recess (44) for the locking bit (9), the front end of which is formed by a parallel cam (43) of the bolt tail (15). 11. Mortise lock according to claim 10, characterized in that the first guide slot (18) extends in the direction of displacement (7) of the bolt, while the second guide slot (19) arranged underneath has a slot part (21) parallel thereto and an adjoining slot part (22) rising towards the first guide slot (18), the short oblique slot (40) running at an opposite angle to this, and that the third, arcuate guide slot (20) is located below the second guide slot (19), the convex side of which is assigned to the second guide slot (19). 12. Mortise lock according to claim 11, characterized in that when the bolt (5) is closed back, the guide bolt (23) is located at the rear end of the first guide slot (18) and the additional bolt (39) is located at the upper end of the oblique slot part (22) of the second guide slot (19) and of the short oblique slot (40) are located. 13. Mortise lock according to at least one of the preceding claims, characterized in that the lower edge of the change (8) is located in the movement range of the locking bit (9) rotating in the retracting direction when the bolt (5) is retracted. 14. Mortise lock according to at least one of the preceding claims, characterized in that there is a shoulder (37) approximately at the transition from the inner bolt end to the bolt tail (15), by means of which the change (8) can be reset when the bolt (5) is closed back.