EP0701037A1 - Lock for prison doors - Google Patents

Abstract

The security lock firmly holds a door shut, esp. in a security area in a prison. It incorporates a set of key-operated tumblers which can retract the bolt, together with a catch retracted via a changeover mechanism by a second turn of the key. The front part (Rv) of a locking device, consisting of a recess (A) in the bolt stem (3), is necessary for locking the bolt out of use. It is formed on a lever (12) which hinges on the stem between a front position used for the locking-out movement and a rear position. This activates the changeover mechanism via a lug (10a) on moving from the front to the rear position. The lever can bear against the stem in the front position.

Description

The invention relates to a lock for prison doors with at least one set of tumblers, which are arranged by means of a key with at least one key bit for withdrawing the bolt, and with a latch, which is secured by a second rotation of the tumblers by a second rotation of the tumblers if necessary the inserted key is retractable.

Prison door locks of the type described above are known. They are equipped with at least one set of tumblers that are only slightly raised to activate the secured change. The reason for this is the fact that for the second rotary movement of the key the bolt lock formed on the bolt shaft must be changed by material removal, but that on the other hand sufficient material must be present in the region of the bolt lock to be able to exclude the bolt. Because of these different requirements, the bolt lock for the actuation of the change is only slightly excluded in the known locks, which results in the limited increase of the tumblers for the actuation of the change.

The invention has for its object to provide a prison door lock of the type described above, in which the tumblers are raised in order to achieve maximum security even when actuating the change to arrange the full height, ie the complete radius of the respective key bit level.

The solution to this problem by the invention is characterized in that the front part required for excluding the bolt is designed in the form of a recess in the bolt shaft bolt closure on a lever which is on the bolt shaft between a front, used for the exclusion movement and one rear end position is pivotally mounted and which actuates the change in a transfer from the front to the rear end position via a stop.

By the inventive design of the bolt closure executed in the shaft using a pivotable lever between two end positions, the advantage is achieved that the same tumblers are used for securing the actuation of the change without additional processing, namely by using the full lifting height for the bolt actuation and thus highest possible security. At the same time, a change in the deadbolt which is necessary for the second key rotation is achieved without material removal, so that there is no impairment of the functional reliability of the bolt actuation, although the tumblers provided for this purpose are also used to secure the alternate actuation.

The lock according to the invention can be designed with one or two tumbler sets, which either have a fixed closure or are convertible. The keys used for the lock can be designed with a single or a double bit with the same or different closure of the beard levels. If a double-bit key is used, it must be pulled out of the lock after the bolt has been pulled back and inserted into the lock rotated by 180 ° for the latch actuation.

According to a further feature of the invention, the lever rests positively on the locking shaft in the front end position and on a stop pin of the change in the rear end position. The lever is preferably loaded by a spring in the direction of its front end position.

In a preferred embodiment of the invention, the lever is arranged between the locking shaft and the striking plate and by angling or thickening of its area of attack with attack surfaces lying in the plane of the bolt shaft, which have at least the strength of the bolt shaft, so that despite the division of the bolt closure between two components, a large-area and reliable contact for the key bit results.

Fig. 1

eine ohne Schloßdecke gezeichnete Draufsicht auf das Schloß im verschlossenen Zustand;

Fig. 2

eine der Fig. 1 entsprechende Draufsicht, in der sich das Schloß im halboffenen Zustand befindet, d.h. mit zurückgezogenem Riegel, aber herausragender Falle;

Fig. 3

eine weitere Draufsicht auf das Schloß gemäß den Fig. 1 und 2, wiederum im halboffenen Zustand gemäß Fig. 2, jedoch mit engeordneten Zuhaltungen zum Zurückziehen der Falle mittels des Wechsels;

Fig. 4

eine weitere Draufsicht auf das Schloß nach den Fig. 1 bis 3 in geöffnetem Zustand mit zurückgezogenem Riegel und über den Wechsel eingezogener Falle;

Fig. 5

eine Darstellung des unteren Teils des Schlosses gemäß Fig. 1, bei der zur Erläuterung des Riegelschlusses die Zuhaltungen nicht dargestellt sind;

Fig. 6

einen Querschnitt gemäß der Schnittlinie VI - VI in Fig. 5;

Fig. 7

eine der Fig. 5 entsprechende Darstellung bei Beginn der Wechselbetätigung und

Fig. 8

eine den Fig. 5 und 6 entsprechende Darstellung mit zurückgezogenem Wechsel.

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

Fig. 1

a plan view of the castle in the closed state drawn without a castle ceiling;

Fig. 2

a plan view corresponding to Figure 1, in which the lock is in the semi-open state, ie with the bolt retracted, but outstanding case.

Fig. 3

a further top view of the lock according to Figures 1 and 2, again in the semi-open state according to Figure 2, but with ordered tumblers for withdrawing the latch by means of the change.

Fig. 4

a further top view of the lock of Figures 1 to 3 in the open state with the bolt retracted and the case retracted by the change.

Fig. 5

a representation of the lower part of the lock of Figure 1, in which the tumblers are not shown to explain the bolt closure.

Fig. 6

a cross section along the section line VI - VI in Fig. 5;

Fig. 7

a representation corresponding to FIG. 5 at the start of the change operation and

Fig. 8

5 and 6 corresponding representation with withdrawn change.

1 to 4, a lock plate 1 can be seen, on the front, angled edge of which a face plate 2 is fastened. Both the locking head 3a formed at the front end of a locking shaft 3 and a latch 4, which is arranged on the front end of a locking shaft 4a, protrude through openings 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. The longitudinal shaft 4a is guided by guide pins 1b, which are also arranged on the lock plate 1. Finally, the lock plate 1 carries threaded bushings 1c, which are used for the detachable fastening of the lock cover, not shown in the drawings.

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 4 and is plugged onto a key pin 1d arranged on the lock plate 1. This key S, which is designed as a double-bit key in the exemplary embodiment, acts on locking tumblers 5 which are mounted on the lock plate 1 in an adjustable manner via elongated holes 5c on the guide pins 1a provided for guiding the locking shaft 3a. The locking tumblers 5 are designed to interact with the key bit of the key S with a tumbler channel 5a. In the area of this tumbler channel 5a, two stop pins 1e are arranged on the lock plate 1, which prevent the key S from being rotated in the wrong direction of rotation.

In the exemplary embodiment, each locking tumbler 5 interacts via a coupling channel 5b with a coupling piece 6a of a changeover tumbler 6, which are also height-adjustable via elongated holes 6b on bearing pins 3c of the locking shaft 3. Via a toothing attached to the front, each changeover tumbler 6 interacts with a locking tumbler 7, which is held in the closed state of the lock on a retaining pin 8, which in turn is fixedly arranged on the lock plate 1.

In order to enable the change-over positions 6 to be separated from the locking tumblers 7, the locking tumblers 7 are guided via elongated holes 7a on guide pins 9a of a support plate 9 which is arranged below the locking shaft 3 between this locking shaft 3 and the lock plate 1 and with the guide pins 9a in elongated holes 3e of the locking shaft 3 engages. This support plate 9 is loaded by a tension spring 9b, which is arranged between a guide pin 9a of the support plate 9 and a spring mandrel 3f fastened on the locking shaft 3.

The latch 4 is actuated either via the locking lug of a profile cylinder, not shown, which is inserted into a locking cylinder opening 1f shown in the drawings in the lock plate 1 and in the lock cover, not shown, or via a change 10, which is on a bearing mandrel 3g on the bolt shaft 3 is pivotally mounted. At the upper end, the change 10 is loaded counterclockwise by a return spring 11.

In order to be able to retract the latch 4 against the force of a latch spring 4c by means of the change 10 in the half-open position of the lock according to FIG. 2, the key S must be removed from the lock and rotated by 180 ° and put back on the key pin 1d. During the subsequent rotation of the key S in a clockwise direction according to FIG. 3, the key bit strikes a lever 12 which is pivotably mounted on a bearing pin 3h of the locking shaft 3. This lever 12 comes into contact with the described key rotation on a stop pin 10a of the change 10, so that with a further turn of the key according to FIG. 4 the upper end of the change 10 via a stop bolt 4b fastened on the drop shaft 4a, the latch 4 into the position shown in FIG 4 retracts the position shown against the force of both the latch spring 4c and the return spring 11.

A prerequisite for this retraction movement of the trap 4 is that the complete tumbler package comprising locking tumblers 5, changeover tumblers 6 and locking tumblers 7 according to FIG. 3 has been raised beforehand via the key bit of the correct key S, so that one fastened on a removable plate 13 Interchangeable pin 13a in the respective closure, correspondingly aligned incisions 7b of the locking tumblers 7 can occur. The interchangeable plate 13 is guided in a longitudinally displaceable manner by means of elongated holes 13b on bearing pins 1g of the lock plate 1 and is longitudinally displaced via an elongated hole 10b in alternation 10 by a driving mandrel 13c fastened on the interchangeable plate 13. An actuation of the change 10 by the key S is therefore only possible if the three-part tumblers have been properly classified according to the respective locking, which is why one speaks of a secured change 10.

In order to hold the bolt in the respective end position, a holder 14 is pivotally mounted on a bearing pin 1h of the lock plate 1, which is loaded by a leg spring 14a and engages with stops in corresponding recesses or behind corresponding stop edges of the bolt shaft 3. This retainer 14 is raised by at least one of the locking tumblers 5 against the force of the leg spring 14a when the locking shaft 3 is to be transferred from the respective end position into the other end position.

In order to withdraw the locking shaft 3a from the locked state of the lock shown in FIG. 1 into the open position, the locking tumblers 5 are first raised by the key S corresponding to the respective locking, so that the coupling pins 6a of the switching tumblers 6 together with a further key rotation the bolt shaft 3 can be moved back. With the locking tumblers 5, the retainer 14 was raised so that the locking shaft 3 is released for this retraction movement.

Since the support plate 9, which is loaded by the tension spring 9b, is moved together with the locking shaft 3 in the pulling-in direction, the locking tumblers 7 coupled with these are also withdrawn with the retraction movement of the changeover tumblers 6, so that these are separated from the retaining pin 8. As soon as the locking shaft 3 has been moved into its rear end position shown in FIG. 2, the tumblers 5, 6 and 7 are lowered into the position shown in FIG Fig. 2 position shown. This semi-open position of the lock with the bolt head 3a retracted but the latch 4 excluded is shown in FIG. 2.

In this half-open position according to FIG. 2, the latch 4 can be pulled back against the force of the latch spring 4c by the locking lug of the profile cylinder not shown in FIG. 2. This retraction movement of the latch 4 is thus independent of the locking mechanism actuated by the key S.

However, in order to retract the latch 4 using the key S, it is necessary to remove the key S from the position shown in FIG. 2 and to put it back on the key pin 1d offset by 180 °. A subsequent rotation of the key S, which is shown in Fig. 3, on the one hand causes the locking tumblers 5 to be lifted via the tumbler levels of the key bit and thus the change tumblers 6 and locking tumblers 7 which are positively connected to these tumblers 5 and secondly by the locking step in another Rotation in a clockwise direction entrains the lever 12, which in this respect forms the front part of the deadbolt. Since the lever 12 comes into contact with the stop pin 10a of the change 10 after a slight pivoting movement about its bearing mandrel 3h arranged on the locking shaft 3a, the further rotation of the key S causes the changeover 10 to pivot about its bearing mandrel 3g. This pivoting movement of the change 10 presupposes that the locking tumblers 7 are aligned by the correct closing of the key S in such a way that the change pin 13a of the change plate 13 can occur in their incisions 7b, which, when the change 10 pivots, as shown in FIG drawn left end position in its right end position shown in FIG. 4. An actuation of the change 4 is therefore only possible with a key S with a proper closure.

The lever 12, which is pivotably mounted on the locking shaft 3, thus replaces the front part of the locking lock which is implemented in the locking shaft 3 in the form of a recess A. The rear part of the bolt closure R _h necessary to retract the bolt shaft 3 is trained directly on the locking shaft 3. The part of the bolt lock R _w required to actuate the change 10 when the bolt is withdrawn is located on the front of the lever 12, whereas the back of this lever 12 serves as the front part R _{v of} the bolt lock when the bolt shaft 3 is shown in FIG. 4 open position of the lock is to be transferred back to the closed position shown in FIG. 1.

For this actuation of the lock, it is necessary to place the key S in the position shown in FIG. 2 on the key pin 1d and to turn it counterclockwise. In this case, the locking tumblers 5 are first raised together with the changeover tumblers 6 and locking tumblers 7 as well as the retainer 14 (via the locking tumbler 5). If a key S with the correct lock has been used, the locking tumblers 7 are then pushed on the locking pin 7 arranged on the lock plate 1 as well as on the change pin 13a arranged on the interchangeable plate 13 with a further counterclockwise rotation. After all tumblers have been properly classified, a further rotation of the key S causes the bolt to be pushed out by contact with the front part R _{v of} the bolt closure, which is formed on the lever 12. A pivoting movement of the lever 12 relative to the shaft 3 of the bolt is prevented by a stop surface 12b, which is formed between the lever 12 and the bolt shaft 3. Such a detail is shown in FIGS. 5, 6 and 7.

As can be seen from FIGS. 5 to 8, the bolt closure is formed on the one hand by a recess A in the bolt shaft 3 and on the other hand by the free end of the lever 12 protruding into this recess A, which can be pivoted to a limited extent about the bearing mandrel 3h arranged on the bolt shaft 3 .

In the exemplary embodiment, this lever 12 (as best seen in FIG. 6) lies between the lock plate 1 and the change 10, which in turn lies below the locking shaft 3. The front, in the recess A of the locking shaft 3 protruding part of the change 12 has a considerably greater strength, so that a stop surface 12b is created, with which the lever 12 in its front, shown in FIGS. 5 and 7 at the the upper edge of the recess A. This stop surface 12b can be seen both in FIG. 8 and in FIG. 6. It limits the pivoting movement of the lever 12 in a clockwise direction.

The thickening of the part of the lever 12 protruding into the recess A results in a sufficiently wide engagement surface 12c for the respective beard of the key S, as can again be seen best in FIG. 6. 5, 7 and 8 show that the lever 12 is loaded in the direction of its front end position by a spring 12a, which is supported on a spring mandrel 3i which is arranged on the drop shaft 3.

If the bolt is to be moved from the excluded position shown in FIG. 5 to the retracted position shown in FIG. 7, the key S shown in dashed lines in FIG. 5 is turned clockwise. In the exemplary embodiment shown, its longer key bit takes the locking shaft 3 with it over the rear part of the locking lock R _h until it has reached the position shown in FIG. 7. If the change to retract the latch 4 is now to be actuated with the key S, it is necessary to remove the key S from the key mandrel 1d and to replace it rotated by 180 °. The latch 4 can then be actuated by turning the key S clockwise. As can be seen from FIG. 7, the longer beard step of the key 7 in turn attacks the interchangeable actuating part R _{w of} the deadbolt which is formed on the front of the lever 12. 8, the lever 12 is pivoted counterclockwise against the force of the spring 12a about the bearing mandrel 3h until it comes to rest against the stop pin 10a of the change 10. Thereafter, the lever 12 takes the change 10 with a further rotation of the key S, so that it is pivoted clockwise on the bearing mandrel 3g, as can be seen from a comparison of FIGS. 7 and 8. 8, the pivoting movement of the change 10 is ended. The trap 4 is withdrawn according to FIG. 4. After opening the door, the key S is turned counterclockwise from the position shown in FIG. 8. The latch 4 returns to its out of the faceplate 2 due to its loading by the latch spring 4c outstanding position. The change 10 and the lever 12 also return from their position shown in FIG. 8 to their initial position according to FIG. 7, with the aid of the return spring 11 or spring 12a.

If the latch 3 is now to be transferred from the position shown in FIG. 7 to its extended position according to FIG. 5, this is done with the help of the key S, which has a beard on the rear surface of the lever 12 during a counterclockwise rotation attacks which forms the front part of the bolt closure R _v . Since the lever 12 bears with its stop surface 12b in a form-fitting manner on the locking shaft 3, an attack on the key bit on the front part of the locking lock R _v causes the locking shaft 3 to be pushed out and thus the locking head 3a emerges from the faceplate 2.

The above-described design of the bolt closure consisting of the rear part Rh, the front part R _v and the interchangeable actuating part R _w in the form of a recess A in the bolt shaft 3 and a lever 12 projecting into this recess A and pivotable relative to the bolt shaft 3 makes it possible to use the same tumblers for securing the change-over actuation that also secure the actuation of the bolt. Here, the full stroke of the tumblers is used both for bolt actuation and for alternate actuation, so that the safety of the lock is considerably increased. However, the use of the pivotable lever 12 not only avoids additional processing of the tumblers, but also additional material removal on the locking shaft 3, which would impair the functional reliability of the lock.

Reference list

1

Lock plate

1a

Guide pin

1b

Guide pin

1c

Threaded sleeve

1d

Key pin

1e

Stop pin

1f

Lock cylinder opening

1g

Bearing pin

1h

Bearing mandrel

2nd

Forend

3rd

Bolt shaft

3a

Bolt head

3b

Long hole

3c

Bearing pin

3e

Long hole

3f

Spring mandrel

3g

Bearing mandrel

3h

Bearing mandrel

3i

Spring mandrel

4th

Cases

4a

Droppings

4b

Stop bolts

4c

Trap spring

5

Locking tumbler

5a

Tumbler channel

5b

Clutch channel

5c

Long hole

6

Diverter lock

6a

Coupling piece

6b

Long hole

7

Locking device

7a

Long hole

7b

incision

8th

Retaining pin

9

Support plate

9a

Guide pin

9b

Tension spring

10th

Change

10a

Stop pin

10b

Long hole

11

Return spring

12th

lever

12a

feather

12b

Abutment surface

12c

Target

13

Removable disk

13a

Change pin

13b

Long hole

13c

Driving mandrel

14

Retainer

14a

Leg spring

A

Recess

R _h

Bolt closure rear part

R _v

Bolt closure front part

R _w

Bolt-lock interchangeable actuator

S

key

Claims (5)

Lock for prison doors with at least one set of tumblers, which are arranged by means of a key with at least one key bit for withdrawing the bolt, and with a latch, which can be withdrawn by a second rotary movement of the possibly changed key by means of a change secured by re-arranging the tumblers is
characterized,
that the front part (R _v ) required for excluding the bolt (3, 3a) of the bolt closure in the form of a recess (A) in the bolt shaft (3) is formed on a lever (12) which is on the bolt shaft (3) is pivotally mounted between a front end position used for the exclusion movement and a rear end position and which actuates the change (10) when moving from the front end position to the rear end position via a stop (10a). Lock according to claim 1, characterized in that the lever (12) bears in a form-fitting manner on the locking shaft (3) in the front end position. Lock according to claim 1 or 2, characterized in that the lever (12) bears in the rear end position on a stop pin (10a) of the change (10). Lock according to one of claims 1 to 3, characterized in that the lever (12) is loaded by a spring (12a) in the direction of its front end position. Lock according to at least one of claims 1 to 4, characterized in that the lever (12) is arranged between the bolt shaft (3) and the lock plate (1) and by angling or thickening its area of attack with attack surfaces lying in the plane of the bolt shaft (3) (12b) is provided, which have at least the strength of the locking shaft (3).

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