EP1637675B1 - Locking device with pivoting bolts for doors on public transport carriages, especially for railway vehicles - Google Patents

Description

The invention relates to a rotary latch lock for vehicle doors having the features of the preamble of patent claim 1.

State of the art:

Rotary traps have long been known for the door lock in vehicles. So far, however, rotary latch locks in vehicle sliding doors or sliding doors on public transport vehicles have only been operated by pneumatic cylinders or manually. Such a catch for a vehicle sliding door is shown for example in the utility model DE 8601065. at However, in such an embodiment, it is necessary that the door is closed with a large momentum, so that the catch does not remain in the pre-rest, but can be moved into the main rest. However, such a large momentum is particularly disadvantageous for doors for rail traffic, since the doors used here often have a high weight: A large flywheel leads to a person at risk (pinching), on the other hand, a high noise pollution for the passengers. It is therefore advantageous if the door slowly moves into the position to be closed and then passes the catch in the main branch.

It is generally known that the locking of vehicle doors is effected by an electric motor.

The patent EP 0109656 B1 discloses a lock for a motor vehicle door with a locking pin which is gripped by a forked bolt which engages in a closed position on a locking lever rotatable about an axis, wherein fork bolt and closing lever about their axis of rotation respectively by one or a common electric motor are driven. In one direction of rotation, the rotary latch is moved via a freewheel, a gear and a cam in the closing direction. In the other direction of rotation is a locking lever also via a freewheel, a gear and a cam in Entrieglungsd.h. Opening direction moves. By the two freewheels causes the respective rotational movement transmits only either on the catch or on the closing lever. A disadvantage of this However, known device is that the above-mentioned object is only partially met, since the motor drive is only able to move the catch from the pre-rest in the main branch. The pre-rest, however, must be achieved by the momentum of the door leaf.

Another electrically driven rotary latch closure device is described in the patent EP 1066438 B1. This patent discloses a door lock, in particular for vehicles, having a rotary latch with a motorized closing aid and a motorized opening aid for the door, wherein one and the same drive motor is used for opening and closing, and a transmission member as a transmission, which can be reversed between two switching positions is, so that the drive energy depending on the switching position of the transmission element alternatively passes on one of two separate output paths to the rotary latch, depending on whether the catch is opened or closed. In addition, the rear derailleur is set ineffective in a fault. A disadvantage of this known device, however, is that it is very space consuming. So not only the drive motor is needed, but also a clutch motor, which is necessary for the circuit of the transmission. Furthermore, in turn, the above-mentioned object is only partially fulfilled, since the motor drive is only able to move the catch from the pre-rest in the main branch. The pre-rest must still be reached by the swing of the door.

It is a requirement of public transport vehicles that, in the event of an emergency, a door must be manually open upon actuation of an emergency maneuver or emergency switch, i. The catch must be unlocked from the main catch. This results in the problem that there is a self-locking because of the pending transmission, which hinders the opening of the rotary latch. A solution to this problem is that upon actuation of the emergency switch, the transmission is decoupled from the drive element of the rotary latch.

Task:

The object of the invention is thus to form a rotary latch with the features mentioned in the preamble of claim 1 in such a way that a secure locking is ensured with little force of the door and that the unlocking of the catch in an emergency without the geared motor is possible. The latter is necessary because, as mentioned above, in public transport vehicles, it is necessary for a door to be manually open in an emergency upon actuation of an emergency or emergency switch, i. The catch must be unlocked from the main catch.

The inventive device fulfills the object with the features of the characterizing part of claim 1. Advantageous developments are the subject of the dependent claims. An advantage of the invention is that the door enters the closed position only with very little momentum, in order then to be locked in a motor-driven manner via the preliminary catch in the main catch.

A further advantage of the invention is that the device makes space-saving without additional drives the decoupling of the catch from the geared motor, so that in an emergency manual operation, the catch can be unlocked without self-locking of the geared motor. In advantageous embodiments of the device according to the invention sensors are also used, which monitor the state of the rotary latch locking. This is to ensure the actual locking of the door. Therefore, it is monitored whether on the one hand, the catch bolt is in the catch, and on the other hand, whether the catch is located in the main branch. In addition, a door leaf control switch can ensure that the door leaf is actually closed.

It can be provided that a door is equipped with multiple rotary latch locks for safety reasons.

Brief Description:

Fig. 1a

eine Seitenansicht der Schließvorrichtung im geöffneten Zustand;

Fig. 1b

eine Seitenansicht der Schließvorrichtung mit der Drehfalle in Vorrast;

Fig. 1c

eine Seitenansicht der Schließvorrichtung mit der Drehfalle in Hauptrast;

Fig. 2

eine explodierte Darstellung der Drehfalle im geschlossenen Zustand;

Fig. 3a

eine perspektivische Darstellung der Schließvorrichtung im geöffneten Zustand;

Fig. 3b

eine perspektivische Darstellung der Schließvorrichtung mit der Drehfalle in Vorrast;

Fig. 3c

eine perspektivische Darstellung der Schließvorrichtung mit der Drehfalle in Hauptrast.

A possible embodiment of the invention is shown in FIGS. 1 to 3. Show it

Fig. 1a

a side view of the locking device in the open state;

Fig. 1b

a side view of the locking device with the catch in pre-restraint;

Fig. 1c

a side view of the locking device with the catch in main branch;

Fig. 2

an exploded view of the catch in the closed state;

Fig. 3a

a perspective view of the locking device in the open state;

Fig. 3b

a perspective view of the locking device with the catch in pre-restraint;

Fig. 3c

a perspective view of the locking device with the catch in Haupastast.

In FIGS. 1a to 1c the closing device is shown in the states "open", "pre-rest" and "main-lock". The locking device is used to lock a door, not shown. Shown is a mounted on the door catch pin 1, which can be locked by the locking device. The path of the catch bolt when closing the door is shown in Fig. 1a by the dashed lines. As soon as the catch bolt enters the provided recess of the rotary latch 2, the closing process of the rotary latch 2 can begin. The rotary latch 2 is driven by an electric geared motor 7. After the rotation of the catch 2 in the pre-locking engages, as shown in Fig. 1b, a locking element 3 with a pawl 4 behind the Vorrastnocken 5 of the catch and prevents turning back the catch. The catch bolt 1 is already locked, but the door is not fully closed yet. To close the door tight, the catch 2 rotates, as shown in Fig. 1c, in the main catch, so that the pawl 4 now engages behind the main locking cam 6 of the catch 2.

Fig. 2 shows an exploded view of the rotary latch in the closed state. The gear motor 7 rotates an output gear 8, which transmits the rotation to a second gear 9. This gear 9 is rotatably connected to a threaded shaft 10, which is designed as a coarse thread shaft. The thread of the threaded shaft 10 preferably has a pitch of 30 °. On the threaded shaft 10 is seated a nut 11 which is translationally moved along the axial direction of the shaft by the rotational movement of the shaft and by a biased spring 17, which is designed as a compression spring. At the end remote from the gear 9, the nut 11 has a ring gear 12. If, during the rotational movement, the nut moves in the direction of the rotary latch 2, then this ring gear 12 engages in a corresponding concealed in this representation ring gear 13, which is located on the rotary latch. This sprocket 13 is shown for example in Fig. 3c. Thus, the coupling of the geared motor 7 is produced with the rotary latch 2 via these sprockets 12 and 13. Since the nut 11 can not move further translationally, the rotational movement of the threaded shaft 10 transmits via the toothed coupling to the rotary latch 2. The rotary latch 2 rotates, driven by the geared motor 7, against the force of a torsion spring 14, which is thus tensioned, first in the Vorrast and then in the main rast.

The catch arranged opposite the locking element 3, which is designed as a two-armed lever and which is rotatably mounted on a rotation axis 15 which is parallel to the axis of rotation of the rotary latch, is mounted. In the open state of the closing device a spring 16 is tensioned, which exerts a force on the lower lever arm of the locking element 3 upwards, so that the upper lever arm of the locking element 3, on which the pawl 4 is arranged, experiences a force in the direction of the rotary latch 2. By this force, the pawl is pressed against the catch 2. If now the rotary latch 2 performs a rotational movement in the direction of the pre-rest, the pawl can engage behind the pre-locking cam 5. In a further rotational movement of the rotary latch 2 in the direction of the main catch of the pawl finally, held by the spring 16, behind the main catch cam 6 of the catch 2 and thus locks the catch 2 in the main position.

If the geared motor 7 now, after the rotary latch has been rotated to the main latching position, rotates in the other direction by a predetermined angular amount, the nut 11 moves back towards the gear 9 and the rotary latch 2 is decoupled from the geared motor 7, wherein the spring 17 spans.

This uncoupling always takes place after each closure of the catch 2, ie, once the catch is rotated in the main branch, the gear motor 7 reverses its direction of rotation due to a corresponding control, so that the catch is decoupled from the geared motor and the gearbox. The gear motor rotates in this direction until the nut 11 rests against the gear 9.

The catch can either be opened electrically or normally via an emergency operation manually.

During the electrical opening of the rotary latch, the geared motor 7 rotates in the direction that the nut 11 resting against the gearwheel 9 is blocked in translation and therefore carries out a rotational movement directly. On the nut 11, a pivot arm 18 is arranged in the direction of the locking element, which moves due to the rotational movement upwards. The pivot arm 18 engages an unlocking lever 19, which is arranged on the upper lever arm of the locking element 3. The release lever 19 is pushed by the pivot arm 18 upwards, whereby also the pawl 4, which is located at the same end of the locking lever 3, moves upward, against the force of the spring 16, which is tensioned. Characterized in that the locking hook is no longer in contact with the rotary latch 2, the catch is unlocked and it rotates, driven by the torsion spring 14, back to the open position, whereby the catch bolt is released. This reverse rotation of the rotary latch is not subject to self-locking by the geared motor or the transmission, since the catch thereof, as described above, has already been decoupled.

As already described, in public transport vehicles there must always be the possibility of manually unlocking and opening a locked door in the event of an emergency. In the embodiment of the invention presented here, this is done by a Anlenkstange 20, which is mounted on the lower lever arm of the locking element and which is led out through an arcuate slot 21 from the locking device. At this Anlenkstange can attach a Bowden cable, not shown, which leads to an emergency operation within the passenger compartment. By a pulling movement on this articulation rod 20, the locking element 3 rotates until the movement of the locking element is blocked by a stop angle 22, and the locking hook 4 rises above the catch 2, so that it is unlocked. The rotary latch now rotates, driven by the torsion spring 14, back into the open position, whereby the catch bolt is released. Again, there is no self-locking because the catch has already been decoupled from the geared motor and gearbox.

FIGS. 3a to 3c show a perspective view of the rotary latch lock in the states "open", "pre-detent" and "main detent". In these representations, the function of the sensors of the different positions of the closing device becomes particularly clear, which represents an essential safety feature of the invention. There are next to a door leaf control switch, not shown, which indicates the actual closing of the door leaf, two sensors which monitor the states of the rotary latch lock. In this embodiment, these sensors are designed as micro-switches. A micro-switch 23 is used for catch pin detection, a second micro-switch 24 for displaying the main latching position. Of the Micro-switch 23 of the catch pin detection senses whether the catch pin 1 of the door is in the catch pin recess of the catch 2. Since the door always closes with a certain momentum, it is rotated by a small angle when the catch bolt 1 contacts the catch 2. This angle is sufficient to open the micro switch 23. This is the signal to allow the rotary latch 2, driven by the gear motor 7, to rotate into the pre-lock. When the catch then rotates into the main catch, so the lower lever arm of the locking element 3 abuts against the micro-switch 24, whereby this is switched. This is the signal that the catch is in the main branch.

Claims (14)

1. Rotating-latch lock for doors on public passenger transport vehicles, in particular on railway vehicles, with a rotating latch (2) which picks up a catch bolt (1) and locks it firmly, wherein the rotating latch goes from an open state into a main catch position, preferably via a pre-catch position, wherein part of the locking movement, at least the end section of the rotary movement of the rotating latch into the main catch, is effected by a, preferably electric, geared motor (7), wherein the same geared motor (7) unlocks the rotating latch again in normal operation, and which has a coupling (8-13) between the geared motor (7) and the rotating latch (2), which has a locking element (3) which prevents reverse rotation of the rotating latch (2) into the open position, which after closing into the main catch is decoupled from the geared motor (7) and this decoupling is effected by the same transmission motor (7), characterised in that after the catch bolt (1) has moved into a recess of the rotating latch the entire locking movement of the rotating latch (2) is effected by the geared motor (7).
2. Rotating-latch lock according to claim 1, characterised in that the coupling contains a nut (11) running on a threaded shaft (10).
3. Rotating-latch lock according to claim 1 or 2, characterised in that the nut (11) has a crown gear (12) on its front face, which engages in a corresponding crown gear (13) on the rotating latch (2) .
4. Rotating-latch lock according to one or more of claims 1 to 3, characterised by means by which the geared motor (7) is automatically reset by a preset angle amount after reaching the final closing position of the rotating latch (2).
5. Rotating-latch lock according to one or more of claims 1 to 4, characterised in that arranged between the nut (11) and the toothed wheel (9) is a spring (17) which supports the translatory movement of the nut (11) on the threaded shaft (10).
6. Rotating-latch lock according to one or more of claims 1 to 5, characterised in that locking element (3) has a locking hook (4).
7. Rotating-latch lock according to one or more of claims 1 to 6, characterised in that attached to the locking element (3) is a rotary spring (16), by the effect of force of which on the locking element (3) a torque is exerted in the direction of the rotating latch (2).
8. Rotating-latch lock according to one or more of claims 1 to 7, characterised in that it has a torsion spring (14), which exerts a force by which the rotating latch is opened from the main catch, after the locking element (3) has been released.
9. Rotating-latch lock according to one or more of claims 1 to 8, characterised in that the locking element (3) has an unlocking lever (19), via which the locking element (3) can be moved in such a way that the rotating latch (2) opens.
10. Rotating-latch lock according to one or more of claims 1 to 9, characterised in that the rotating latch (2) can be unlocked manually in an emergency.
11. Rotating-latch lock according to one or more of claims 1 to 10, characterised in that the locking element (3) has a connecting rod (20), via which the rotating latch (2) can be unlocked in an emergency.
12. Rotating-latch lock according to claim 11, characterised in that a Bowden cable acts on the connecting rod (20).
13. Rotating-latch lock according to one or more of claims 1 to 12, characterised in that it has a sensor which recognises that the catch bolt (1) is located in the rotating latch (2).
14. Rotating-latch lock according to one or more of claims 1 to 13, characterised in that it has a sensor which recognises that the rotating latch (2) is located in the main catch.

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