Device for preventing lift car of lift from accidentally moving

Abstract

The invention discloses a device for preventing a lift car of a lift from accidentally moving, which comprises a machine frame, a rope wheel, a rope wheel shaft, a monitoring mechanism, a triggering assembly and a lift braking device. The monitoring mechanism comprises a graduated disk, a motion electromagnet, a rotating block and a movable pull pin mechanism. The graduated disk is fixedly installed on the extending-out end of the rope wheel shaft and provided with a plurality of clamping grooves evenly distributed at intervals along the circumferential direction of the graduated disk. The motion electromagnet is fixedly arranged on the machine frame, the rotating block is rotatably disposed on the machine frame, the movable pull pin mechanism is fixedly arranged on the rotating block, and pull pins of the movable pull pin mechanism are located in the clamping grooves of the graduated disk on the condition that the motion electromagnet loses power. The triggering assembly is connected with the lift braking device. A triggering structure is arranged on the rotating block and after the rotating block rotates at a certain angle, the triggering structure triggers the triggering assembly to be in motion. The device for preventing the lift car of the lift from accidentally moving is capable of detecting upward or downward low-speed movements due to faults of the lift car of the lift and enabling the lift to slow down and stop.

Description

technical field [0001] The invention relates to the technical field of elevator car safety protection, in particular to a device for preventing accidental movement of the elevator car. Background technique [0002] At present, elevator use devices are all used to detect the action device when the elevator car is overspeeding. It can only detect that the elevator is in a dangerous state when overspeeding and drive the elevator braking device to slow down and stop the elevator; When the elevator moves slowly at a low speed, the elevator speed limiter of the prior art cannot be detected, so there will be no corresponding action to make the elevator decelerate and stop, thus causing danger; for example, when the elevator is leveling and the elevator car When the door is open, the elevator car is running out of control due to a failure of an electrical component or the elevator car is slowly moving upward or downward due to other unknown factors such as the traction force of the ...

AI Technical Summary

Problems solved by technology

[0002] At present, elevator use devices are all used to detect the action device when the elevator car is overspeeding. It can only detect that the elevator is in a dangerous state when overspeeding and drive the elevator braking device to slow down and stop the elevator; When the elevator moves slowly at a low speed, the elevator speed limiter of the prior art cannot be detected, so there will be no corresponding action to make the elevator decelerate and stop, thus causing danger; for example, when the elevator is leveling and the elevator car When the door is open, the elevator car is running out of control due to a failure of an electrical component or the elevator car is slowly moving upward or downward due to other unknown factors such as the traction force of the elevator main machine is not enough to maintain the leveling and static state of the car. Downward movement, in this case, the moving speed of the elevator car is very low, and has not yet reached the overspeed action speed, so the previous elevator speed limiter cannot detect that the speed of the elevator at this time is a dangerous speed, and the speed limiter will act accordingly Therefore, the mechanism will not act, so it will not be able to provide action instructions to the brake components, and the brake components will not stop the slow-moving car. Between the elevator landing door, the upward or downward movement of the elevator car may cause shear injury to passengers, and in severe cases, it may cause death of passengers

Images