EA017467B1 - Device for controlling and locking elevator car door - Google Patents

Abstract

The invention relates to elevator engineering, in particular to devices for opening and closing an elevator door. The invention us aimed at increasing reliability of an apparatus operation. The device for controlling and locking an elevator door comprises an actuator (1), at axes (10, 11) of which levers (12, 13) are mounted changing the distance between rails (14) fixed thereon. The rails (14) are adapted to interlock with rollers (15) of a shaft door. The actuator (1) has a connecting rod (16) coupled with a driving mechanism (4) of the car door and the lever (12), both levers (12 and 13) are arranged at a similar angle relative to the connecting rod (16). A locking lever (20) is provided with an axle (26), which is adapted to cooperate with slot (29) walls of a stationary base (7) due to the own weight of the locking lever (20). The connecting rod (16) has a sector (17) adapted to a constant contact with the locking lever (20).

Description

(57) The invention relates to the field of elevator construction, in particular to devices for opening and closing elevator doors. The objective of the invention is to increase the reliability of the device. The device for controlling and locking the door of the elevator car contains an actuator (1), on the axes (10), (11) of the base (9) of which levers (12), (13) are installed, changing the distance between the runners (14) fixed to them . The runners (14) have the ability to interact with the rollers (15) of the shaft door. The actuator (1) has a connecting rod (16) associated with the drive mechanism (4) of the cabin door and the lever (12). The levers (12) and (13) are placed with respect to the connecting rod (16) at the same angle. The locking lever (20) is equipped with an axis (26), which has the ability to interact with the walls of the groove (29) of the fixed base (7) due to the dead weight of the locking lever (20). The connecting rod (16) is equipped with a sector (17), installed with the possibility of constant contact with the locking lever (20).

017467 Β1

017467 B1

The invention relates to the field of elevator construction, in particular to devices for opening and closing elevator doors.

A device for actuating and locking elevator doors [1] with drive rails interacting with drive rollers of the elevator shaft door, the drive runners are located between said rollers, comprising an actuator. An actuator controls the distance between the drive rails and comprises an actuator lever associated with the cab door drive. The actuator also has a spring-loaded latch mounted for rotation around an axis, which interacts with a stationary locking groove and locks the cab doors. In this case, the spring is connected to the latch and the actuating lever with the possibility of transmitting pressure and pre-tension by it.

A disadvantage of the known device is the need to fine-tune the rollers of the door of the shaft, caused by their location on the outside of the drive runners, which reduces the reliability of the device. The presence of a multifunctional compression spring also reduces reliability, since its breakdown destroys the entire device. In addition, the disadvantages of the design include the complexity of its manufacture, due to the installation of some rotating parts on rolling bearings.

Closest to the claimed is a device for controlling and locking elevator doors [2], containing an actuator, on the axes of which are two levers that change the distance between the runners. The runners interact with the rollers of the shaft doors located between them. The actuator is equipped with a spring-loaded connecting rod connected to the drive mechanism of the cabin door and one of the levers. The connecting rod and levers are mounted at a predetermined angle. The actuating device also contains a locking device for the cabin door in the form of a lever, equipped with a tensioning mechanism, the tension element of which is connected to one of the runners through a deflecting flywheel mounted on the connecting rod. The axis of the lever of the locking device enters the groove of the fixed base under the action of a spring, fixing the drive of the cab door in the closed position. The control over the locking of the cab door drive is carried out by a switch mounted on a fixed base, the counterpart of the switch is mounted on the lever of the locking device. In the closed position, the switch closes the safety circuit of the elevator, which allows the cab to move between floors.

The known device is devoid of some of the disadvantages of the above device [1], namely, the rollers of the shaft doors are located between the runners - no fine tuning is required. However, this device has its drawbacks, which include insufficient reliability due to the presence of a tension element in the form of a flexible cable, the break of which excludes the possibility of opening doors. Also, the reliability of the device is reduced due to the design of the locking device, which removes the lock of the doors in case of breakdown of the pressing lever of the locking device of the spring, which is unacceptable when the elevator car stops between floors.

The objective of the invention is to increase the reliability of the device.

The problem is solved in that in the device for controlling and locking the door of the elevator car containing an actuator, on the axes of the base of which levers are installed with the ability to rotate and change the distance between the runners fixed on these levers, the said runners have the ability to interact with the rollers of the shaft door, wherein the actuator has a locking lever with an axis and a connecting rod connected to the drive mechanism of the cabin door, one of the said levers and a locking lever of the cabin door, said levers are positioned with respect to the connecting rod at the same angle, the axis of the locking lever has the ability to interact with the walls of the groove of the fixed base, according to the invention the connecting rod is equipped with a sector installed with the possibility of constant contact with the locking lever, and the axis of the locking lever has the ability to contact the walls of the groove of the fixed base due to the dead weight of said locking lever.

The invention is illustrated by drawings, where:

in FIG. 1 shows a General view of the device in a closed state;

in FIG. 2 - the same, on an enlarged scale in the position in which the drive of the cab door is held in the closed position;

in FIG. 3 - the device in a position in which the elevator car is in the zone of opening doors;

in FIG. 4 - device in the process of opening doors;

in FIG. 5 - the device is in a position in which the elevator car is located outside the door opening zone.

A device for controlling and locking the door of the elevator car (Fig. 1) contains an actuator 1 mounted on the drive carriage 2 of the drive of the car door. The carriage 2, in turn, is mounted on a beam 3, which is fixed on the roof of the elevator car (not shown). Also on the beam 3 is mounted a drive mechanism 4 of the cabin door, which, by means of a toothed belt 5 through a leash 6

- 1 017467 is connected to the actuator 1. On the beam 3 there is a fixed base 7 and a driven carriage 8. The door leaves of the cab (not shown) are hung on the carriages 2 and 7.

The actuator 1 (Fig. 2) contains a base 9, on the axis 10, 11 of which levers 12 and 13 are installed, respectively. Skids 14 are fixed on levers 12, 13. When the elevator car is in the stopping zone, the rollers 15 of the shaft door are between the skids 14 at an equidistant distance Y1. A connecting rod 16 is also installed on the axis 10 of the base 9, on the axes of which a leash 6 and a sector 17 are fixed, providing a distance Y1 by contact with the lever 12. The connecting rod 16 is in tension under the influence of a tension spring 18. A locking lever 20 is installed on the axis 19 of the base 9 spring-loaded compression spring 21 to compensate for vibrations that occur during the movement of the elevator car. A lever 23 is mounted on the axis 22 of the base 9 for fixing the connecting rod 16, also spring-loaded with a spring 21. An axis 24 is mounted on the locking lever 20 with a roller 25 mounted on it and constantly in contact with sector 17. The locking lever 20 is also equipped with an axis 26 and a counterpart 27 of the switch 28, which is mounted on a fixed base 7. On a fixed base 7 there is a groove 29, in engagement with the walls of which there is an axis 26 of the locking lever 20. The engagement of the axis 26 with the walls of the groove 29 is ensured by the dead weight of the locking lever 20. N and the base 9 has a groove 30 that limits the stroke of the connecting rod 16.

The device operates as follows (Fig. 3). When the elevator car is in the stopping zone, on command from the control station (not shown), the drive mechanism 4 of the cabin door mounted on the beam 3 is turned on, actuating the actuator 1. Through the belt 5, the drive mechanism 4 moves the leash 6 towards the door opening, turning the connecting rod 16 around the axis 10. The angle of rotation of the connecting rod 16 is limited by the groove 30 of the base 9. Simultaneously with the connecting rod 16, the lever 12 is rotated around the axis 10 by means of the sector 17. The lever 12 drives the runners 14, reducing the distance between them, simultaneously but turning the lever 13 about the axis 11. When moving the skids 14 come into contact with the rollers 15 of the shaft door, not allowing the lever 12 to turn further. In this case, the sector 17 acts on the roller 25 mounted on the axis 24, turning the locking lever 20 around the axis 19. The locking lever 20, overcoming the force of the spring 21 and its own weight, disengages the axis 26 from the engagement with the walls of the groove 29 of the fixed base 7, while simultaneously outputting the response part 27 of the contact with the switch 28, which opens the safety circuit of the elevator and prevents the movement of the cabin. After the axis 26 is disengaged from the walls of the groove 29 (Fig. 4), the drive mechanism 4 begins to move the actuator 1, the driving carriage 2 on which it is mounted, and the driven carriage 8, kinematically connected with the leading carriage 2, towards the door opening. In this case, the lever 23 rotates around the axis 22 and fixes the connecting rod 16 to prevent it from turning.

When the elevator car is in the stop zone (Fig. 3), in the event of a blackout of the drive mechanism 4 of the car door, the connecting rod 16 starts to rotate around axis 10 under the action of the spring 18. Further, the operation of the device is similar to that described above. After the axis 26 is disengaged from the walls of the groove 29 (Fig. 4), it is possible to manually open the doors of the passenger from inside the cabin.

When the elevator car is outside the stop zone when an erroneous command is received from the control station (not shown) to open the door, the drive mechanism 4 is turned on, actuating the actuator 1. At the same time, the connecting rod 16 is rotated, moving the runners 14, which do not come into contact with the rollers 15 mine doors. Thus, the runners 14 are reduced to a minimum distance, and the axis 26 of the locking lever 20 remains engaged with the walls of the groove 29 of the fixed base 7. In this case, the cabin door remains locked and it cannot be opened.

When the elevator car is outside the stop zone (Fig. 5), in the event of a blackout of the drive mechanism 4 of the cabin door, the connecting rod 16 starts to rotate around the axis 10 under the action of the spring 18. In the future, the operation of the device is similar to the previous situation. In this case, the cab door remains locked and cannot be opened.

The proposed design of the device for controlling and locking the elevator car door allows to increase the reliability of its operation.

Information sources.

1. RF patent 2373133, B66B 13/12, publ. 11/20/2009.

2. US patent 7252179, B66B 13/06, publ. 08/07/2007.

Claims (1)

CLAIM A device for controlling and locking the door of the elevator car, containing an actuator (1), on the axes (10), (11) of the base (9) of which levers (12), (13) are installed with the possibility of rotation and changing the distance between the runners (14) mounted on these levers (12), (13), the said runners (14) have the ability to interact with the rollers (15) of the shaft door, while the actuator (1) has a locking lever (20) with an axis (26) and a connecting rod ( 16) associated with the drive mechanism (4) of the cabin door with one of the said levers (12), (13) and the locking lever (20) of the engine The cab doors, the said levers (12), (13) are placed with respect to the connecting rod (16) at the same angle, the axis (26) of the locking lever (20) has the ability to interact with the walls of the groove (29) of the fixed base (7), characterized in that the connecting rod (16) is equipped with a sector (17) installed with the possibility of constant contact with the locking lever (20), and the axis (26) of the locking lever (20) has the ability to contact the walls of the groove (29) of the fixed base (7) due to dead weight of said locking lever (20).