EP0701035A1 - Lock for prison door - Google Patents

Abstract

Between each closing tumbler (4) and locking tumbler (6) is a reversible tumbler (5) which is guided on the bolt shaft (3) and which can be coupled by a coupling (4b,5a) with the closing tumbler. The reversible tumbler is detachably connected to the locking tumbler by gearing. The locking tumbler in turn is guided on a support plate (7) which during normal operation of the bolt is connected with force-locking action by at least one spring (8) to the bolt shaft but for reversing the closing can be fixed in its front end position against the force of the spring on drawing back the locked-out bolt. The support plate can be fixed in the front end position by a change-over rod (9) which with the door opened is set in the lock displaceable against a recoil spring. The rod can be guided height adjustable on guide pins (1e) of the lock plate (1).

Description

The invention relates to a lock for prison doors with at least one tumbler set, each consisting of directly operated by the key bit, liftable on the lock plate guided tumblers and locking tumblers, which can be lifted and moved in the longitudinal direction of the bolt and via one consisting of a coupling piece and a coupling channel Coupling for changing the lock are releasably connected to the locking tumblers, the locking tumblers being transferred to their neutral starting position both in the locked and in the retracted position of the bolt and the locking tumblers are fixed on a locking pin of the lock plate when the bolt is locked.

Locks of the type described above for prison doors are known, for example, from DE-AS 1 156 674. Due to the adjustability of the lock, you have a high level of security against unauthorized opening of the prison doors.

A disadvantage of the known locks can be seen in the fact that when the bolt is retracted, a change in the locking can be carried out unintentionally if the bolt is locked with another key, because a locking change occurs automatically if the bolt which is retracted is locked with another key. Since it cannot be seen with which closure the bolt was excluded, this can lead to difficulties if the bolt is to be moved back to its retracted position.

The invention has for its object to develop the lock described above for prison doors so that only a targeted change of the lock can be carried out so that the disadvantages resulting from unconscious lock change due to use of other keys are avoided.

The solution to this problem by the invention is characterized in that between each locking tumbler and locking tumbler a changeover tumbler is arranged, which can be raised on the bolt shaft and can be coupled to the locking tumbler via the coupling and which is releasably connected to the locking tumbler via a toothing which is in turn liftable on a support plate which is non-positively connected to the bolt by normal actuation of the bolt by at least one spring, but can be fixed in its front end position against the force of the spring when the bolt is withdrawn when the bolt is withdrawn.

This inventive design of a lock intended for prison doors has the advantage that a change of the closure can only take place if the bolt is excluded when the door is open with the correct key and the opening is locked by setting the support plate before retracting the bolt is specifically prepared. By this definition of the support plate, which results in a separation between locking and conversion tumblers, the assignment between these two tumblers is canceled so that the lock can subsequently be changed by using a different key.

With the design according to the invention, not only is the handling of the prison door lock improved, but also increased security is achieved because an unintentional, possibly manipulated, change of the closure is prevented.

According to a further feature of the invention, the support plate is fixed in its front end position by a changeover rod, which at open door is arranged against the force of a return spring adjustable in the lock. In a preferred embodiment of the invention, this changeover rod is adjustable in height on guide pins of the lock plate and can be coupled to the support plate via a coupling hook.

In order to prevent tampering even when the changeover rod is actuated, the invention also proposes to secure the changeover rod in both end positions of the bolt against stops by means of stops. According to the invention, this can be done in that the changeover rod is secured against lifting when the bolt is retracted by a stop mandrel interacting with the support plate and, when the bolt is completely excluded, by abutment of a stop edge on the bolt shaft. The last-mentioned fuse is released when the bolt is slightly withdrawn in order to enable the changeover rod to be actuated.

In a preferred embodiment of the invention, the spring effecting a non-positive connection of the support plate to the bolt is arranged between the bolt shaft and the support plate.

Finally, the invention proposes to arrange two sets of tumblers, each consisting of locking, switching and locking tumblers, the tumblers of which are arranged on the same support plate so that they can be lifted. This doubling of the tumblers further increases safety.

Fig. 1

eine ohne Schloßdecke gezeichnete Draufsicht auf das Schloß mit zurückgezogenem Riegel;

Fig. 2

eine der Fig. 1 entsprechende Draufsicht mit ausgeschlossenem Riegel;

Fig. 3

eine weitere Draufsicht, bei der der Riegel aus seiner ausgeschlossenen Stellung nach Fig. 2 leicht zurückgezogen ist;

Fig. 4

eine Draufsicht auf das Schloß nach den Fig. 1 bis 3 in einer Stellung, in der der Riegel nach Betätigen der Umstellstange zurückgezogen wurde und damit eine Trennung der Sperr- und Umstellzuhaltungen sowie ein Festlegen der Sperrzuhaltungen auf dem Haltestift erfolgt ist, und

Fig. 5

eine weitere Draufsicht auf das Schloß, wobei sich der Riegel in der ausgeschlossenen Stellung befindet, das Ausschließen jedoch mit einer anderen Schließung erfolgte.

An exemplary embodiment of the lock according to the invention is shown in the drawing, namely:

Fig. 1

a top view of the castle drawn without a lock cover with the bolt retracted;

Fig. 2

a plan view corresponding to Figure 1 with the bolt excluded;

Fig. 3

a further plan view, in which the latch is withdrawn slightly from its closed position according to FIG. 2;

Fig. 4

a plan view of the lock of FIGS. 1 to 3 in a position in which the bolt has been retracted after actuating the change-over rod and thus a separation of the locking and change-over tumblers and a setting of the locking tumblers on the retaining pin has taken place, and

Fig. 5

another top view of the lock, the bolt is in the locked position, but the lock was done with a different lock.

In the plan views according to FIGS. 1 to 5, a lock plate 1 can be seen in each case, on the front, angled edge of which a face plate 2 is attached. The locking head 3 formed at the front end of a locking shaft 3 projects through an opening in the faceplate 2. The locking shaft 3 is mounted so as to be longitudinally displaceable via elongated holes 3b on guide pins 1a which are fastened to the lock plate 1. For fastening the lock cover, not shown in the drawing, the lock plate 1 is further provided with threaded bushings 1b.

The bolt consisting of bolt shaft 3 and bolt head 3a is actuated by a key S, which is shown in dashed lines in FIGS. 1 to 5 and is attached to a key pin 1g arranged on the lock plate 1. This key S, which is designed as a double-bit key in the exemplary embodiment, acts on two sets of locking tumblers 4, which are mounted on the lock plate 1 in a height-adjustable manner via elongated holes 4a on the same guide pins 1a as the locking shaft 3. The locking tumblers 4 are each designed to interact with the key bit of the key S with a tumbler channel. In the area of this tumbler channel, two stop pins 1c are arranged on the lock plate 1, which prevent the key S from being rotated in the wrong direction of rotation.

Each locking tumbler 4 interacts via a coupling channel 4b with a coupling piece 5a of a changeover tumbler 5, which are mounted in a height-adjustable manner via elongated holes 5b on bearing pins 3c of the locking shaft 3. Each changeover tumbler 5 interacts with teeth of a locking tumbler 6 via a toothing formed on the front. The locking tumblers 6 are guided in a height-adjustable manner by means of elongated holes 6a on guide pins 7a of a support plate 7, which is arranged below the bolt shaft 3 between this bolt shaft 3 and the lock plate 1. The guide pins 7a of the support plate 7 which engage in the elongated holes 6a of the locking tumblers 6 pass through elongated holes 3d which are formed on the locking shaft 3.

The locking tumblers 6 are formed with an incision 6b with which they can be fixed on a bearing mandrel 1d. These bearing pins 1d are arranged on the lock plate 1.

A tension spring 8 is arranged between the support plate 7 and the locking shaft 3. This tension spring 8, which is designed as a helical spring in the exemplary embodiment, is arranged at one end on a spring mandrel 3e of the locking shaft 3 and at the other end on a spring mandrel 7b of the support plate 7. This spring mandrel 7b of the support plate 7 extends through an elongated hole 3f in the locking shaft 3.

In order to enable the changeover tumblers 5 to be separated from the locking tumblers 6, the support plate 7 is provided at one end with a coupling hook 7c which interacts with a coupling hook 9a of a changeover rod 9. This changeover rod 9 is guided in a vertically movable manner via elongated holes 9b on guide pins 1e of the lock plate 1 and is loaded by a return spring 9c. At the lower end, the changeover rod 9 is provided with a stop pin 9d, which interacts with an extension 7d of the support plate 7. In addition, the changeover rod 9 is formed with a stop edge 9e which interacts with a front corner of the locking shaft 3 (see FIGS. 2 and 5).

In order to be able to raise the changeover rod 9 against the force of the return spring 9c, it is in the region of an opening 2a formed in the faceplate 2 a pin 9f, which is intended for the attachment of a suitable tool.

Finally, the drawings each show tumbler springs 10 which are arranged on a spring mandrel 1f and which load the locking tumblers 4 in the direction of the key mandrel 1g. In addition, a retainer 11 can be seen, which is pivotably mounted on a bearing mandrel 1h of the lock plate 1 and is loaded by a leg spring 11a. This retainer 11 is pivoted counterclockwise against the force of the leg spring 11a by at least one locking tumbler 4 and engages with a locking lug 11b in the two end positions of the locking shaft 3 in recesses provided for this purpose in order to prevent the bolt 3 from being moved out of the respective end position unintentionally prevent.

In order to exclude the locking head 3a from the faceplate 2 from its retracted position shown in FIG. 1, the key S shown in dashed lines in FIG. 1 is turned counterclockwise. Its two key bit stages first cause the locking tumblers 4 to be raised. The coupling tumblers 5a of the changeover tumblers 5, which engage in the respective coupling channel 4a of the locking tumbler 4, simultaneously raise the shift tumblers 5 when the locking tumblers 4 are lifted.

Since the locking tumblers 6 are also connected to the locking and changing tumblers 4 and 5 via the teeth on the front of the changeover tumblers 5 and the back of the locking tumblers 6, the locking tumblers 6 on the guide pins are also lifted by the initial turning of the key S. 7a of the support plate 7.

If the key S corresponding to the respective closure of the lock is used, the locking tumblers 6 are raised in such a way that their cuts 6b are located in front of the bearing pins 1d. By turning the key S further, the step of the key shaft 3 of the key shaft 3 in FIG. 1 can be moved to the left via the step of the key bit 3 which engages in the bolt lock of the bolt shaft 3, so that the bolt head 3 a from the faceplate is excluded. As can be seen from FIG. 2, the locking tumblers 6 are fixed on the bearing pins 1d when the bolt is excluded. Since the change tumblers 5 are taken along via the bearing pins 3c of the locking shaft 3, but which remain on the lock tumblers 4 arranged on the guide pins 1a of the lock plate 1, the lock tumblers 4 are separated from the change tumblers 5 by the coupling pieces 5a of the change tumblers 5 from the coupling channels 4b the locking tumblers 4 emerge. This situation can also be seen in FIG. 2. Because the support plate 7 is carried along the locking movement of the locking shaft 3 via the guide pins 7a located in the elongated holes 3d of the locking shaft 3, the connection between the changeover tumblers 5 and the locking tumblers 6 is maintained by means of the toothing. Since the locking tumblers 4 are loaded by the tumbler springs 10, they return to a neutral position, which is shown in FIG. 2. The lock is in the locked state with the bolt head 3a excluded.

In order to return the locking head 3a from this closed state into the starting position according to FIG. 1, a key S with the correct locking is again required. As a result of its suitable closure, this key lifts the locking tumblers 4 into such a position that, during the subsequent retraction movement of the locking shaft 3, the coupling pieces 5a of the changeover tumblers 5 enter the coupling channels 4b of the locking tumblers 4, so that the locking shaft 3 moves into the starting position according to FIG. 1 can be withdrawn.

If a change of the respective closure is desired, it is necessary to exclude the bolt head 3a from the faceplate 2 as described above and then withdraw it slightly when the door is open. The lock is then in the state shown in Fig. 3. In this state, the lower front corner of the locking shaft 3 has detached from the stop edge 9e of the changeover rod 9. This changeover rod 9 can thus be raised from the lower position shown in FIG. 2 to the upper position shown in FIG. 3 against the force of the return spring 9c with the aid of a tool which passes through the opening 2a in the faceplate 2 to the pin 9f Changeover rod 9 is attached. A raise the changeover rod 9 is therefore only possible if the door was previously opened with the correct key and the locking shaft 3 has been slightly withdrawn with the aid of the correct key.

As can be seen in FIG. 3, when the changeover rod 9 is raised, its coupling hook 9a engages in the coupling hook 7c of the support plate 7. This support plate 7 is thus held in place by the changeover rod 9 in the front end position shown in FIG. 3 when the locking shaft 3 is now retracted into the rear end position shown in FIG. 4 with the key S having the previous closure. During this retraction movement of the locking shaft 3, the changeover tumblers 5 are taken along via the bearing pins 3c, so that the changeover tumblers 5 are separated from the locking tumblers 6 in the region of their toothing. At the same time, the coupling pieces 5a of the switching tumblers 5 completely enter the coupling channels 4b of the locking tumblers 4, so that the situation shown in FIG. 4 results at the end of the retraction movement of the locking shaft 3. As can be seen in FIG. 4, there is also a separation of the support plate 7 held by the changeover rod 9 from the locking shaft 3 against the force of the tension spring 8, as shown in its stretched representation in FIG. 4.

By separating the locking tumblers 6 stored on the bearing pins 1d from the switching tumblers 5 connected to the locking tumblers 4, it is now possible to provide the lock with a different lock by inserting another key into the key channel of the locking tumblers 4. This difference results from a comparison of the positions of the coupling pieces 5a of the changeover tumblers 5 in relation to the coupling channels 4b of the locking tumblers 4 with the bolt excluded according to FIGS. 5 and 2. In accordance with this new closure, the change-over tumblers 5 are also coupled with the locking tumblers 6 when the bolt shaft 3 is subsequently excluded with the new key. 5, the coupling hook 7c of the support plate 7 is separated from the coupling hook 9a of the changeover rod 9, so that the changeover rod 9 returns to the starting position due to the force of the return spring 9c. In this In the starting position, the changeover rod 9 is secured in both end positions of the bolt by means of stops against lifting. When the bolt is withdrawn according to FIG. 1, this securing is carried out by abutment of the stop mandrel 9d on the extension 7d of the support plate 7. When the latch is excluded according to FIG. Unwanted manipulation of the lock with the aid of the changeover rod 9 is therefore not possible either with the bolt locked or with the bolt withdrawn. A change of the closure can therefore only be carried out consciously in the manner described above.

Reference list

S

key

1

Lock plate

1a

Guide pin

1b

Threaded sleeve

1c

Stop pin

1d

Bearing mandrel

1e

Guide pin

1f

Spring mandrel

1g

Key pin

1h

Bearing mandrel

2nd

Forend

2a

opening

3rd

Bolt shaft

3a

Bolt head

3b

Long hole

3c

Bearing pin

3d

Long hole

3e

Spring mandrel

3f

Long hole

4th

Locking tumbler

4a

Long hole

4b

Clutch channel

5

Diverter lock

5a

Coupling piece

5b

Long hole

6

Locking device

6a

Langoch

6b

incision

7

Support plate

7a

Guide pin

7b

Spring mandrel

7c

Clutch hook

7d

renewal

8th

Tension spring

9

Diverter rod

9a

Clutch hook

9b

Long hole

9c

Return spring

9d

Stop mandrel

9e

Stop edge

9f

pen

10th

Tumbler spring

11

Retainer

11a

Leg spring

11b

Locking nose

Claims (8)

Lock for prison doors with at least one tumbler set, each consisting of lock tumblers that can be operated directly by the key bit, that can be raised on the lock plate, and that can be lifted and moved in the longitudinal direction of the bolt and via a coupling consisting of a coupling piece and a coupling channel for changing over the Closure are releasably connected to the locking tumblers, the locking tumblers being transferred to their neutral starting position both in the locked position and in the retracted position of the bolt and the locking tumblers are fixed on a locking pin of the lock plate when the bolt is locked,
characterized by
that between each locking tumbler (4) and locking tumbler (6) a changeover tumbler (5) is arranged, which can be raised on the bolt shaft (3) and can be coupled to the locking tumbler (4) via the coupling (4b, 5a) and which can be coupled via a Gearing is detachably connected to the locking tumbler (6), which in turn can be raised on a support plate (7), which is non-positively connected to the bolt shaft (3) during normal operation of the bolt by at least one spring (8), but for changing the closure against the force of the spring (8) when retracting the excluded bolt in its front end position can be fixed. Lock according to claim 1, characterized in that the fixing of the support plate (7) in its front end position is effected by a changeover rod (9) which is arranged in the lock in an adjustable manner against the force of a return spring (9c) when the door is open. Lock according to claim 2, characterized in that the height-adjustable rod (9) is guided on guide pins (1e) of the lock plate (1) and can be coupled to the support plate (7) via a coupling hook (9a). Lock according to claim 2 or 3, characterized in that the changeover rod (9) is secured against lifting in both end positions of the bolt by stops (9d, 9e). Lock according to claim 4, characterized in that when the bolt is retracted, the changeover rods (9) are secured against lifting by a stop pin (9d) which interacts with the support plate (7). Lock according to claim 4, characterized in that the change-over rod (9) is secured against lifting when the bolt is completely excluded by contacting a stop edge (9e) on the bolt shaft (3). Lock according to at least one of Claims 1 to 6, characterized in that the spring (8) which provides a non-positive connection between the support plate (7) and the locking shaft (3) is arranged between the locking shaft (3) and the support plate (7). Lock according to at least one of claims 1 to 7, characterized in that two tumbler sets each consisting of locking, switching and locking tumblers (4,5,6) are arranged, the tumblers of which are arranged on the same support plate (7) so that they can be raised .

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