DE20307840U1 - Emergency unlocking device on a sliding door for vehicles, in particular public transport vehicles - Google Patents

Abstract

The system includes a cylinder (5), a spring (5.1) and a slotted link (6) engaging a door opening bolt (7). A knob or plunger operates a 3/2-way valve supplying compressed air to the cylinder. The drive supplements an electric motor (4) connected to the upper support and guide system (3) for the door frame members (2) and the left (1A) and right (1B) door leaves.

Description

Emergency release device on a swing-sliding door for vehicles, in particular public transport vehicles

The invention relates to an emergency release device on a pivoting sliding door for vehicles, in particular vehicles of local public transport with the features of the preamble of claim 1.

Pivoting sliding doors of the type assumed here are known per se and are described, for example, in EP 1 040 979 A2. They are generally designed in such a way that a spreading lever, on which the reaction force of the drive device exerts a torque to generate the displacement movement of the support guide in the transverse direction to the door opening, is in a position at or just behind the dead center of its pivoting movement in the closed position of the support guide in order to lock the support guide in the closed position.

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In this position the door can no longer be opened even by pushing from the inside.
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It is known to provide an emergency release device for such pivoting sliding doors so that, for example, passengers can open the door at any time to leave the vehicle, even in the event of a power failure. The emergency release device has a spring-loaded cylinder which is under the pressure of the supplied compressed air in the normal state and locks the tensioned spring in this normal state. When the spring-loaded cylinder is vented using an emergency valve, the tensioned spring is released and the support guide is pushed outwards under the force of this spring until it reaches at least the dead center position mentioned above, so that the door can then be fully opened by hand.

The problem with such emergency release devices is that the door can no longer be returned to the closed position by hand after an emergency release and opening, as the force of the released, relaxed spring of the spring-loaded cylinder prevents the support guide from being pushed back into its original position. Special measures must therefore be taken to be able to close the door again after an emergency release. To do this, it is necessary to put pressure on the spring-loaded cylinder again so that its spring is tensioned and no longer offers any resistance to the support guide moving back to the original position of the closed door.

The invention is based on the object of designing an emergency release device with the features of the preamble of claim 1 in such a way that the emergency-released pivoting sliding door can be re-closed by hand using the simplest technical means.

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This object is achieved according to the invention with the features of the characterizing part of claim 1. Advantageous further developments of the emergency release device according to the invention are described in the dependent claims.

The basic idea of the invention is to use the emergency tap, which is used to trigger the emergency release of the pivoting sliding door, to simultaneously create conditions under which the door can be closed again manually. The invention is based on the idea that the pressure-free state of the spring-loaded cylinder only needs to be maintained until the door or the support guide is pushed outwards beyond the dead center position, after which it can be fully opened at any time.

This means that the emergency valve can be returned to the rest position very quickly after it has been activated. The design is such that in the rest position the spring-loaded cylinder is ventilated again and the spring is guided into the tensioned position. This does not prevent the door from being fully opened, which has already been pushed past the dead center position, and the door can be closed again manually at any time because the spring of the spring-loaded cylinder is guided back into the tensioned position and does not prevent the support guide from being pushed in.

Since a passenger who activates the emergency release device by operating the emergency tap will generally release this emergency tap immediately after operating it, the simplest embodiment of the solution to the problem according to the invention consists in returning the actuating element of the emergency tap to the rest position under spring force after it has been released, so that the emergency tap itself returns to the rest position. It is of course also possible to provide a detachable coupling between the actuating element and the emergency tap, so that if the passenger does release the actuating element

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longer, the emergency valve itself can still be returned to the rest position under spring force. It is also possible to provide a timer that returns the emergency valve to the rest position after a predetermined time, regardless of the position of the actuating element.

In general, it is advantageous or even mandatory that an emergency tap is installed both inside the vehicle and outside the vehicle in the area of the pivoting sliding door so that the door can be unlocked in an emergency from both the inside and the outside. Of course, it is then sensible to equip both emergency taps with the device described above, which allows the door to be closed again manually. In order to prevent the emergency tap from being accidentally activated while driving, it is advantageous to provide a corresponding device to prevent the emergency tap from being accidentally activated. For example, in the case of an emergency tap installed inside the vehicle, this can be done using a magnetic device that releasably fixes the emergency tap in the rest position. In the case of an emergency tap installed outside the vehicle, it can be advantageous to make the emergency tap lockable using a locking device that can be operated with a key so that the parked vehicle cannot be opened using the external emergency tap.

The emergency release device according to the invention can be used both with pivoting sliding doors with one door leaf and with pivoting sliding doors with two door leaves that can be moved against each other in their longitudinal direction, each of which is suspended in the support guide via a carriage guided on a round rod. An electric motor common to both door leaves can serve as the drive device, and the transmission of the reaction force to at least one end of the support guide can take place in a manner known per se via a coupling rod.

In the following, an embodiment of an emergency release device according to the invention is explained in more detail with reference to the accompanying drawings. 5

The drawings show:

Fig. 1 a double-leaf pivoting sliding door seen from the inside in the fully open state;
Fig. IA shows the area E of Fig. 1 in an enlarged view;

Fig. 2 shows, in a further enlarged view compared to Fig. IA, the spring-loaded cylinder of the emergency release device according to Fig. 1 and IA with connecting elements in the emergency operating state;

Fig. 3 is a view similar to Fig. 2 showing the spring-loaded cylinder in the operating state in which the door is fully opened; Fig. 4 is a view similar to Fig. 2 showing the spring-loaded cylinder in the operating state in which the door is closed;

Fig. 5 in a pneumatic circuit diagram the compressed air supply to the spring-loaded cylinder with the emergency valve.
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Fig. 1 shows a pivoting sliding door for a public transport vehicle. In the following, only those elements of the pivoting sliding door that are relevant for the description of the emergency release device are explained.
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In Fig. 1, the door is shown in the fully opened state when viewed from the inside. The door leaves IA and IB are suspended from a support guide 3 so that they can be moved longitudinally relative to one another in a manner not specifically shown. They can be brought together from the fully opened position shown in Fig. 1 in a sliding movement directed towards one another, and then they can be moved inwards together with the support guide 3 in the transverse direction to the door opening into

a closed position in which the door leaves IA and IB lie within the door frame 2 and thus within the vehicle wall. In the opposite direction, the support guide can be moved outwards from a closed position into a sliding position in which the door leaves again lie outside the vehicle wall and can be pushed apart in their longitudinal direction to fully open the door. In the exemplary embodiment shown, the drive device is an electric motor 4, from which the door leaves IA and IB are moved in a manner not shown in more detail, for example via a toothed belt drive. The force for moving the support guide outwards or inwards is derived from the reaction force of the drive device in a manner known per se and described, for example, in EP 1 040 979 A2. The reaction force can be transmitted to the more distant end of the support guide via a coupling rod, depending on the position of the electric motor 4. The transfer of the reaction force to the support guide 3 takes place, as also explained in the document cited above, in such a way that a spreading lever that transmits the force in the closed position of the support guide 3 is in a position at or just behind the dead center of its pivoting movement in order to lock the support guide 3 in the closed position. In this position, the door can no longer be opened by hand, even by pressing from the inside.

An emergency release device is provided so that the door can be opened by the passengers in an emergency, for example in the event of a power failure. It has a spring-loaded cylinder 5 connected to the vehicle's compressed air system, which is connected to the compressed air network 9 via a 3/2-way valve 8 in the manner shown in Fig. 4. The 3/2-way valve 8 is designed as an emergency valve that is operated via an actuating element 8.1, which can be designed as an actuating lever, for example. The 3/2-way valve 8 has a rest position in which the spring-loaded cylinder 5 is connected to the compressed air network 9 and is pressurized. In this state,

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as can be seen from Fig. 3 and 4, the spring 5.1 is tensioned and, as will be explained in more detail below, the emergency release device is out of operation. If the 3/2-way valve is brought into the position shown in Fig. 5 by means of the actuating element 8.1 and in which the spring-loaded cylinder 5 is connected to the outside space, the spring-loaded cylinder 5 is vented, whereby the pressurization is removed and the spring 5.1, which was held in the tensioned state via the piston rod 5.2 of the spring-loaded cylinder 5 and a spring plate 5.3 when the spring-loaded cylinder 5 was ventilated, relaxes and comes into the position shown in Fig. 2.

The piston rod 5.2 of the spring-loaded cylinder 5 is connected via a mounting element

6.1 with a slotted hole 6, and the not shown pre-

The direction for moving the support guide 3 has an opening bolt 7 which is guided in the elongated hole bracket 6. The arrangement is such that outside of emergency operation, i.e. when the spring 5.1 is tensioned in the "operating state door closed", as shown in Fig. 4, the opening bolt 7 is located at the inner end of the elongated hole of the elongated hole bracket 6, while in the "operating state door fully open", as shown in Fig. 3, it is located at the outer end of the elongated hole of the elongated hole bracket 6.

When the emergency release is activated, the movement of the piston rod

5.2 of the spring-loaded cylinder 5 under the action of the spring 5.1, as shown in Fig. 2 under the keyword "emergency operation", the inner end of the slot of the slot bracket 6 is moved together with the opening bolt 7. This displacement movement causes the support guide 3 to be pushed outwards at least beyond the dead position and then the door can be opened completely by hand. However, this type of emergency release has the disadvantage that when the spring-loaded cylinder 5 and spring 5.1 are in the position shown in Fig. 2, the support guide 3 and thus the door cannot be moved into the

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Closed position can be moved back because, due to the position of the elongated hole tab 6, the opening bolt 7 cannot be moved back into the position shown in Fig. 4 against the strong pressure of the spring 5.1. For this reason, the emergency release device is designed in such a way that the emergency tap, i.e. the 3/2-way valve 8, returns to the rest position under spring force when the actuating element 8.1 is released, in which position the spring-loaded cylinder 5 is ventilated again from the compressed air network 9 and returns to the operating state shown in Fig. 3 and 4. The spring 5.1 is again in the tensioned state, and now the support guide 3 can be manually moved back to the closed position via the dead center position at any time, thus closing the door.

Claims (8)

1. Emergency release device on a pivoting sliding door for vehicles, in particular public transport vehicles, with at least one door leaf that can be moved in its longitudinal direction, which is suspended and guided in a support guide, which can be moved together with the door leaf from a closed position in which the door leaf lies in the vehicle wall, into a sliding position in which the door leaf lies outside the vehicle wall, and back, and with a drive device for moving the door leaf, from whose reaction force the force for moving the support guide is derived, the arrangement being such that the door is guided from the closed position into the sliding position and back via a dead center position, by which it is held shut in the closed position, the emergency release device having a spring-loaded cylinder, when vented by means of an emergency tap, the tensioned spring is released and the support guide is pushed outwards under spring force at least beyond the dead center position, characterized in that the emergency tap ( 8 ) is provided with a device for automatically returning from the operating position into the rest position, wherein in the rest position the spring-loaded cylinder ( 5 ) is ventilated and the spring ( 5.1 ) is guided into the tensioned position, in which the support guide ( 3 ) can be guided by hand via the dead center position into the closed position. 2. Emergency release device according to claim 1, characterized in that the device for automatically returning the emergency tap ( 8 ) has a spring element which returns the emergency tap ( 8 ) to the rest position when the actuating element ( 8.1 ) is released and/or after a predetermined period of time has elapsed. 3. Emergency release device according to claim 2, characterized in that the emergency tap ( 8 ) is designed as a 3/2-way valve, via which the spring-loaded cylinder ( 5 ) can be connected to a compressed air source ( 9 ), the circuit being such that in the rest position the spring-loaded cylinder ( 5 ) is connected to the compressed air source ( 9 ) and is ventilated, while in the operating position it is vented and the 3/2-way valve returns from the operating position to the rest position under spring force when an actuating element ( 8.1 ) is released. 4. Emergency release device according to one of claims 1 to 3, characterized in that the device for moving the support guide ( 3 ) from the closed position outwards beyond the dead center position has an opening bolt ( 7 ) which is guided in an elongated hole tab ( 6 ) connected to the piston rod ( 5.2 ) of the spring-loaded cylinder ( 5 ), the arrangement being such that when the spring ( 5.1 ) is tensioned, the opening bolt ( 7 ) lies at the inner end of the elongated hole in the closed position and at the outer end of the elongated hole in the open position and when the emergency release is actuated by the movement of the piston rod ( 5.2 ) under the action of the spring ( 5.1 ), the inner end of the elongated hole of the elongated hole tab ( 6 ) is displaced with the opening bolt ( 7 ). 5. Emergency release device according to one of claims 1 to 4, characterized in that an emergency tap is arranged both in the vehicle and outside the vehicle in the area of the pivoting sliding door. 6. Emergency release device according to claim 5, characterized by a device for preventing unintentional actuation of the emergency tap. 7. Emergency release device according to claim 6, characterized in that in particular the emergency tap arranged in the vehicle is releasably fixed in the rest position by a magnetic device. 8. Emergency release device according to claim 6, characterized in that in particular the emergency tap arranged on the outside of the vehicle can be locked by a locking device which can be actuated by means of a key.