EP0864716B1 - Lock with a latch bolt, a dead bolt, and a follower - Google Patents

Abstract

Pressure is exerted on the latch (4) via a pivot lever (7). A dog (8) is connected and disconnected by a coupling element (11) positioned between the bolt (5) and the dog. When the bolt is retracted, the dog produces a connected (9) and a disconnected (10) position by means of a radial cam (12). The lock nut (6) is a component separate from the pivot lever. The dog sits on the lock nut or pivot lever. The coupling element and dog are held in contact by a shared pair of slide surfaces (14).

Description

The invention relates to a lock with latch, bolt and Lock nut according to the preamble of claim 1.

Such castle is known for example from the DE 36 25 541 A and DE 43 19 325 A.

In this known lock the case is extended Latch uncoupled from the lock nut. This measure serves to avoid any introduction of force into the lock interior, when the bar is locked. In this way becomes an imminent destruction of the interior of the lock during burglary attempts counteracted. The castle nut rotates so to speak empty as soon as the bar is locked.

To achieve this, a driver is provided, the between the acting on the case rotary lever and the Trap is arranged. The driver is via a coupling element in Einkuppelstellung or disengaging position brought. The coupling element is moved by a control cam, which the coupling element depending on the bolt position positioned.

In the case of DE 36 25 541A, the rotary lever is rigid with the castle nut connected. Rotary lever and lock nut exist, so to speak from a single piece.

The driver is as a pivoting lever on the case arranged and has a drive projection, which depends from its pivotal position on the latch with the rotary lever the lock nut can be brought into coincidence. This is referred to as Einkuppelstellung. In another position a contact between the rotary lever and driver is excluded. This is called disengaging position.

The Einkuppelstellung and the Auskuppelstellung be forced by the coupling element, which on a control cam of the bolt slides off.

The fundamental problem of this construction method is that the gear connection between bolt and Schlossnuß has to bridge great distances. Therefore exists the danger of relatively large geared games between the individual gear elements such as cam, coupling element, Driver, rotary lever. The gear game is by the Driver, the two-armed unbalanced lever is even stronger.

In principle, however, any wear on the in Contact located gear members are taken into account. Thus, on the one hand, a relatively large overlap between aimed at the rotary lever and the drive projection of the case. In the present construction, however, results This causes the problem that the driver to a relatively large Angle must be pivoted when the geared connection Disconnect between the rotary lever and driver is.

To avoid the existing danger of training game between to avoid the relatively long gear members is a compression spring provided on the driver, which from the coupling element loaded end of the driver always in Appendix holds on the coupling element.

Since the fall-side end of the coupling element in a with the trap moving pair of pins is guided on this Way a relative movement between the coupling element and the Driver at the journal end practically impossible.

In this way, however, the coupling element of the compression spring always in contact with the control cam of the bolt held. At this end, the coupling element is stationary in Lock case stored. When you press the case, the fall side End of the coupling element a forced circular motion follow him as a result of the bondage to the Pin pair of the trap is impressed.

Here, the coupling element is forced a circular motion, along which the upper end of the coupling element, which under the bias of the compression spring on the driver held, must also lower.

This happens while the rotary lever is in the trap Draw in lock box. On the other hand, between the rotary lever and the latch always a certain relative movement is inevitable because the trap is translationally horizontal and the rotary lever is rotated, occurs at the contact point between the rotary lever and its point of application at the Trap always relative motion.

The oppositely directed and by the compression spring impressed pivotal movement of the driver thus causes an additional relative movement between the rotary lever and its point of attack on the driver, that of the former relative movement is directed opposite.

This results in an additive overlay of both Relative movements with the risk of disproportionate wear.

As in this embodiment, a compression spring required is to the driver between Einkuppelstellung and To move disengaging position, here is a forced wear preprogrammed, which must be avoided.

It is therefore an object of the present invention, in the Known locks with detachable lock nut on the necessary geared coupling between latch and latch as far as possible freedom from play a disproportionate wear to avoid.

This object is achieved with the features of the claim 1.

From the invention there is the advantage that under Avoidance of fit problems Relative movements between the links of the gear chain between bolt and latch be minimized and only on the designated Sliding surface pair can occur.

This will be a long lasting and over the life precise and clearance-free lock created, which is not only simple in construction and production, but beyond that, despite the extra idle function the lock nut consists of only a few parts.

The invention provides the possibility of the individual Links of the gear chain between bolt and latch short run and in this way low gear play to obtain.

The Gleitflächenpaar lies between coupling element and Takeaway. The driver is merely the movement of the Lock nut or rotary lever.

As a rule, the lock nut between bolt and latch is arranged, can be in this way short components realize with small ranges of motion.

If lock nut and rotary lever are stored coaxially with each other, can the sliding surface pair with the circumference of a Circle or a circular cylinder around the axis of rotation of Cover lock nut and rotary lever. In this way one becomes more uniform and consistent over the rotational movement of the lock nut Surface contact between the mutual sliding partners achieved.

The low surface pressures provide in this case for further increase in service life.

Of particular advantage is a development in which the driver, who either at the castle nut or at the Rotary lever sits alone under the influence of gravity stands and only with its weight on the contact surface the coupling element rests.

Since the driver easily common to Schloßnuß and rotary lever is appropriate, it is only self-weight hang up on the coupling element. When turning the Lock nut then can the driver on a corresponding Sliding slideway of the coupling element. Especially when using of circular slideways gives the advantage a smooth operation of the lock. For one of a kind Pressure spring biased towards the Gleitbahnpaarung Driver applies accordingly.

Fig.1

ein Ausführungsbeispiel der Erfindung im eingekuppelten Zustand, und

Fig.2

ein Ausführungsbeispiel der Erfindung im ausgekuppelten Zustand.

In the following the invention will be explained in more detail with reference to an embodiment. Show it:

Fig.1

an embodiment of the invention in the engaged state, and

Fig.2

an embodiment of the invention in the disengaged state.

Unless otherwise stated below, the following description always for all figures.

The figures show a lock 1. Such lock 1 sits in a lock case 2 with forend 3. In appropriate Holes of the forend 3 are a case 4 and a latch 5 out. The latch 4 and the latch 5 are from the lock box 2 wrapped. The lock nut 6 has a central square opening for receiving a knob or a door handle and is set in rotation by this.

In one function, the Schloßnuß 6 serves the admission the trap to the trap, usually under spring preload in the extension direction, in the lock case 2 so far retract that the fall tip from the strike plate 20 is driven out.

The strike plate 20 in turn is connected to the door frame connected.

It now applies, the rotational movement of the lock nut in dependence from the position of the bolt 5 so predestined that the rotational movement with retracted latch 5 in a retraction movement the trap 4 is implemented while the rotary motion at vorgeschlossenem latch 5, so if the latch in the Striker plate of the door frame is retracted, without influence on the trap stays.

It must therefore be the geared connection between the Locknut and the trap are disengaged if necessary. This is when retracted into the strike plate of the door frame Latch 5 required. When not retracted latch 5 However, the case 4 should be able to be operated.

For this purpose, the lock nut 6 is a from the rotary lever 7, which acts on the latch 4 with a Hebelarmende, separated Component. The rotational movement of the lock nut 6 can thus of the rotational movement of the rotary lever 7 are independent. This creates the basic requirement that the lock nut 6 so to speak can be rotated at idle when the latch. 5 is locked.

On the other hand, but also the rotary lever 7 is retracted Bar 5 act on the trap 4. This is about the driver 8 achieved in the present case on the Rotary lever 7 is arranged. Similarly, the driver can 8 are also attached to the lock nut 6. In any case engages one end of the driver either at the lock nut or on the rotary lever, while the other end then via a drive projection on the rotary lever 7 or on the lock nut 6 must attack.

The driver 8 therefore creates the rotational gear coupling between lock nut 6 and rotary lever 7 and that either depending on the position of the coupling element eleventh

The coupling element 11 is transverse to the latch 5 in the lock case 2 movable and slides for this purpose on a cam 12 of the bolt 5 off. The coupling element is at retracted Latch 5 is raised and approaches while the Schloßnuß 6. At its the Schloßnuß 6 facing side has the coupling element 11 a sliding surface, which in the direction the rotational movement of the lock nut 6 to retract the Trap 4 concave increases.

In the concave rising sliding surface of the coupling element 11 is a Gleitgegenfläche the driver 8 to lie. It is in this way a sliding surface between Driver 8 and coupling element 11 is provided, via which Coupling element 11 and driver 8 constantly in contact stay.

Since the coupling element 11 with its lower transverse side the control cam 12 of the bolt 5 slides off, it is the Transverse movement depends on the retraction position or Extended position of the bolt 5 imprinted.

In this case, the driver 8 via the Gleitflächenpaarung 14 must follow the movement of the coupling element 11.

The driver 8 in turn is between a Einkuppelstellung (see Fig.1) and a disengaging position (see Fig.2) movable. In the Einkuppelstellung 9 is between the Lock nut 6 and the rotary lever 7 a torsionally rigid connection created while in Auskuppelstellung 10 the lock nut 6 is freely movable relative to the rotary lever 7.

For this purpose, in the present case, the driver 8 a pivotally mounted on the rotary lever 7 pawl, by means of the coupling element 11 in front of an associated drive projection 15 is pivoted on the lock nut and pivoted in this Position is held by the coupling element 11.

Equally, however, the driver at the Be mounted lock nut and with a corresponding drive projection interact on the rotary lever 7.

In addition, the figures show that Schloßnuß 6 and Rotary lever 7 are additionally mounted coaxially, and that in the Einkuppelstellung 9 the Gleitflächenpaar 14 with the peripheral portion one to the bearing axis 16 concentric circle 17 covers.

The peripheral portion is - seen from the lock nut towards the latch 5 and includes an angular range, in about the maximum rotational range of the lock nut. 6 equivalent.

Since now in the Einkuppelstellung 9 of the driver 8 the Rotational movement of the rotary lever 7 impressed about the bearing axis 16 gets results in a circular limited Gleitbahnpaarung 14 the advantage of a chatter-free sliding of two sliding surfaces on each other.

In addition, it can be provided that the sliding surface pair 14 with the peripheral portion of a bearing axis to the 16th concentric circular cylinder covers. In this way one becomes Surface contact between driver 8 and coupling element 11 is reached. The resulting low surface pressure ensures for high wear resistance at the same time advantage a smooth sliding between the two Gleitflächenpartnern.

In addition, it can be provided that the driver 8 alone under the influence of gravity and only with its weight on the contact surface of the coupling element 11 rests.

However, there is always a well-defined contact between the sliding surface partners 14 may be desirable is additionally proposed, the driver under spring force to hold against the sliding surface of the coupling element 11. This is in the present case by a coil spring with two Thighs reached, which latched with one end on the rotary lever 7 while she sits up with her other thigh the driver 8 is supported in the direction of the coupling element 11.

In particular, the available sliding surface size the practical wear resistance is ensured In this way, in addition, a virtually position-independent Contact between driver and coupling element achieved.

Nevertheless, the relatively small paths that the Gleitflächenpaarung 14 travels, the guarantee for the most extensive Wear resistance despite predetermined by the coil spring 18 Contact forces. To the function:

The latch 5 is in the retracted position. The Coupling element 11 is on the raised portion of the control cam 12 stored, which is located on the upper edge 13 of the bolt 5. The associated sliding surface has the driver 8 so far raised towards the drive projection 15 of the lock nut, that the driver 8 is located in front of the drive projection 15. at Operation of the lock nut 6 to open the door becomes the frictional connection from the lock nut via the drive projection 15 transfer the driver 8. This in turn relies on his arranged on the rotary lever 7 pawl shaft 19 from, whereby the rotary lever 7 is set in a synchronous rotational movement becomes. In this case, the rotary lever 7 engages the trap tail of the case 4 and pulls them back into the lock case 2.

Meanwhile, the driver 8 makes an exact Circular movement around the bearing axis 16 around and slides it to the peripheral portion of the concentric circle 17, which limits the corresponding sliding surface of the coupling element 11. Since the distance between the bearing axis 16 and Gleitflächenpaarung 14 is relatively low, the relative path between the circular limited outside of the driver. 8 and the circular limited sliding surface of the coupling element 11 kept low.

If, on the other hand, the bolt 5 is in the extended position (see Figure 2) is the coupling element 11 in the extended position descending cam 12 followed. This was also the kreiskonkave Sliding surface on the coupling element 11 with lowered, at which the driver 8 with its kreiskonvexen counter surface is in contact.

As a result, the driver 8 comes out of the diameter range out, the drive projection 15 of the lock nut. 6 can sweep when turning the lock nut. The drive projection 15 therefore deletes functionally past the driver 8, as soon as the driver 8 of the lowering movement of the coupling element 11 followed. The castle nut turns up without influence the rotary lever 7 through.

LIST OF REFERENCE NUMBERS

1

Lock

2

lock box

3

stulp

4

Cases

5

bars

6

lock follower

7

lever

8th

takeaway

9

engagement position

10

disengaging

11

coupling element

12

cam

13

Top edge of the bolt

14

face pair

15

driving projection

16

bearing axle

17

concentric circle

18

spiral spring

19

pawl shaft

20

striking plate

Claims (6)

1. Lock (1) having a catch (4), a bolt (5) and a lock follower (6), wherein the lock follower (6) influences the catch (4) via a rotary lever (7) with the interpositioning of a dog (8) which can be coupled and uncoupled by a coupling element (11), wherein the coupling element (11) is seated in the lock box in a moveable manner transverse to the bolt (5) between the bolt (5) and the dog (8) and moves the dog (8) to the coupled position (9) when the bolt (5) is retracted and the dog (8) is otherwise located in the uncoupled position (10), wherein the lock follower (6) is a component which is separate from the rotary lever (7) and is coaxially mounted together with the lock follower (6) and wherein the dog (8) is seated on the lock follower (6) or rotary lever (7) and the coupling element (11) and the dog (8) are held together in contact between the coupled position (9) and the uncoupled position (10) by means of a common sliding surface pair (14), characterised in that the coupling element (11) has its position in the transverse direction imposed upon it by virtue of a radial cam (12), which is located on the bolt (5), in dependence upon the retraction or extension position of the bolt (5) such that the coupling element (11) raises the dog (8) to the coupled position (9) when the bolt (5) is retracted and lowers said dog to the uncoupled position (10) when the bolt (5) is extended.
2. Lock as claimed in claim 1, characterised in that in the coupled position (9) the sliding surface pair (14) is aligned with a peripheral portion of a circle (17) which is concentric with respect to the bearing spindle (16) of the lock follower (6) and the rotary lever (7).
3. Lock as claimed in claim 1 to 2, characterised in that the sliding surface pair (14) is aligned with the peripheral portion of a circular cylinder which is concentric with respect to the bearing spindle.
4. Lock as claimed in claim 1 to 3, characterised in that the dog (8) alone is under the influence of gravity and lies with its weight on the sliding contact surface of the coupling element (11).
5. Lock as claimed in claim 1 to 3, characterised in that in the direction towards the sliding contact surface of the coupling element (11) the dog (8) is under the influence of a biased spring (18) and lies under spring bias on the sliding contact surface of the coupling element (11).
6. Lock as claimed in claim 1 to 5, characterised in that the dog (8) is a latch which is mounted on the lock follower (6) or rotary lever (7) so as to be pivotable about a latch shaft (19) and which is pivoted by means of the coupling element (11) up to an allocated drive projection (15) on the rotary lever (7) or lock follower (6) and is held in this coupled position (9) by the coupling element (11).

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