DE102010010007A1 - Safety device for lift, has safety bar movably supported from lift car and forming stop unit at stop element to prevent movement of lift car in safety region, which lies above or below stop element, in lift shaft - Google Patents

Abstract

The device (5) has a safety bar (6) movably supported at a lift car (1) in a direction of a wall of a lift shaft (4) in a locking position, where the device is arranged at the lift car. The bar forms a stop unit at a stop element (7) to prevent movement of the lift car in a safety region (s), which lies above or below the stop element, in the lift shaft. An actuator is coupled with the safety bar for movement in to the locking position or from the locking position into a rest position.

Description

The invention relates to a securing device for elevators, which have a lift cage arranged movably in a car.

Safety locks for lifts are z. B. off WO 2009/050328 A1 known. With the help of these swiveling circlips, the car is locked to an elevator door in the adjacent elevator shaft while the elevator door is open.

In the maintenance of elevators, it is often necessary to enter security rooms above and / or below the car, in particular in the elevator shaft above the last floor or below the first floor. It must be prevented that the car drives into these security rooms.

Object of the present invention is therefore to provide a safety device for elevators, with which such shelters can be secured in a simple manner.

The object is achieved with the safety device of the type mentioned above in that the safety device is arranged on the car and at least one in the direction of a wall of the hoistway from the car to a locking position movably mounted safety latch, which is to form a stop on a respective associated stop element is configured to prevent a method of the car in a above or below the stop element lying shelter in the elevator shaft.

According to the teachings of the present invention, a safety device is attached to the car, with which a method of the car is prevented in the security rooms inside. In this case, stop elements are arranged in the elevator shaft, against which a on the car in the direction of the wall of the elevator shaft movable away mounted safety latch strikes when the car wants to move into the shelter.

With such a security device, it is possible in a simple manner to secure a car simply by moving out of the locking bolt in the locked position. The safety device can be made inexpensive and yet robust.

Preferably, the securing device has at least one actuator coupled to the securing bolt for movement into the blocking position or out of the blocking position into a rest position. The actuation of the safety bolt by means of an actuator and not by hand has the advantage that the safety device can be made intrinsically safe.

For this purpose, preferably at least one limit switch for switching off the actuator when it reaches the blocking position and / or the rest position is coupled to the securing bolt.

It is particularly advantageous if the securing bolt is polygonal in cross-section and is mounted in a correspondingly contoured opening in a guide plate, wherein the guide plate is firmly connected to a car. In this way, the safety catch can be rotatably mounted in the guide plate back and forth.

Advantageously, the locking bolt has a spindle which is rotatably mounted relative to the locking bolt in or on the locking latch so that the rotation of the spindle causes a longitudinal movement of the locking bolt. It is a spindle motor for rotation of the spindle mounted stationary to the car. Such a spindle motor allows a simple and inexpensive way a reciprocating movement of the locking bolt. The spindle motor can be easily stored stationary to the car by, for example, mounted on the guide plate.

The invention will be explained in more detail with reference to the accompanying drawings. Show it:

1 - Sketch of a lift shaft with car and mounted on the roof of the car safety device;

2 - Sketch of a safety device for lifts.

1 leaves a car 1 recognize that on a carrying rope 2 and a counterweight 3 in a lift shaft 4 is arranged movable up and down. At the roof of the car 1 is a safety device 5 with a safety catch 6 appropriate. The safety catch 6 is to protect a shelter S in the elevator shaft 4 from the car in the direction of the inner wall of the elevator shaft 4 moved out to get in touch with a stop 7 in the elevator shaft 4 another boot up of the car 1 into the shelter S inside to prevent.

The safety device 5 with the safety catch 6 are at the stop 7 aligned so that the locking latch 6 at the stop 7 abuts when the car 1 is moved into an inadmissible position in the shelter S inside.

In this way, the shelter S is secured so that z. B. in the maintenance of elevators Maintenance personnel through an emergency hatch in the roof of the car 1 on the roof of the car 1 climb and work safely in the shelter.

In the same way, it is conceivable that the safety device 5 at the bottom of the car 1 is attached to one below the car 1 secure shelter.

2 leaves a sketch of a security device 5 with the linear reciprocating safety catch 6 detect. This safety catch 6 is polygonal in cross-section, z. B. three, four, five or preferably hexagonal and in a correspondingly contoured opening in a guide plate 8th stored. In the illustrated embodiment, a guide plate 8th perpendicular from a base plate 9 folded to the top. Another guide plate 10 can also be perpendicular to the base plate 9 go off to another guide for the safety latch 6 to accomplish.

It is still recognizable that with the base plate 9 an actuator 11 z. B. is connected in the form of a spindle motor, via a gear tower 12 a spindle 13 drives. This spindle 13 engages with its external thread in an internal thread that with the locking latch 6 connected or integrally made with this, so that upon rotation of the spindle 13 the safety catch 6 according to the direction of rotation of the spindle 13 is moved back and forth.

An intrinsically safe switch 14 is provided to prevent an inadmissible procedure of the safety bolt 6 to prevent and the safety device 5 to put it in a safe condition or to keep it there.

Furthermore, the final position 15a . 15b provided, which recognize the end position of the safety bolt in the retracted locking position and in the retracted in-position (shown) and the actuator 11 Stop after reaching the blocking position or rest position.

The actuator 11 is with the end position buttons 15a . 15b and the intrinsically safe switch 14 preferably connected to an electronic control, in turn, with the roof of the car 1 emergency release is coupled. When opening the exit hatch in the roof of the car 1 the emergency release is triggered and the intrinsically safe control causes the spindle motor to start up 11 so that the safety catch 6 from the rest position into the locked position moves out, in this way the above the car 1 Secure shelter S to secure.

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• WO 2009/050328 A1 [0002]

Claims (5)

Safety device ( 5 ) for lifts located in a lift shaft ( 4 ) movably arranged car ( 1 ), characterized in that the securing device ( 5 ) on the car ( 1 ) is arranged and at least one towards a wall of the elevator shaft ( 4 ) from the car ( 1 ) in a blocking position movably mounted locking latch ( 6 ), which for forming a stop on a respective associated stop element ( 7 ) is adapted to a method of the car ( 1 ) in one above or below the stop element ( 7 ) lying in the elevator shaft (S) in the elevator shaft ( 4 ) to prevent. Safety device ( 5 ) according to claim 1, characterized in that the safety device ( 5 ) at least one with the safety catch ( 6 ) coupled actuator ( 11 ) has to move into the blocking position or out of the blocking position into a rest position. Safety device ( 5 ) according to claim 2, characterized in that Endlagetaster ( 15a . 15b ) for switching off the actuator ( 11 ) upon reaching the locking position and / or the rest position with the locking bolt ( 6 ) are coupled. Safety device ( 5 ) according to one of the preceding claims, characterized in that the safety catch ( 6 ) is polygonal in cross-section and in a correspondingly contoured opening in a guide plate ( 8th . 10 ), wherein the guide plate ( 8th . 10 ) fixed to a car ( 1 ) is connectable. Safety device ( 5 ) according to one of the preceding claims, characterized in that the safety catch ( 6 ) a spindle ( 13 ), which relative to the safety catch ( 6 ) rotatable in or on the securing bolt ( 6 ) is mounted so that the rotation of the spindle ( 13 ) a longitudinal movement of the safety bolt ( 6 ) and with a stationary to the car ( 1 ) mounted spindle motor as an actuator ( 11 ) for rotation of the spindle ( 13 ).

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