SU765175A1 - Lift - Google Patents

Description

one

The invention relates to lift engineering and can be used in passenger, cargo-and-freight and freight elevators.

Known is a lift containing a cabin and a counterweight mounted in a shaft on rails and suspended at the ends of a haul rope, around a drive driving pulley, and a speed limiter with a rope of two branches, one of which is connected to the lever of the catchers via fasteners, mounted on the cab.

The disadvantage of this elevator is the load of the shaft by the tension device located therein and the extended branches of the rope-block system along the entire height of the shaft from its attachment to the ceiling, which worsens the conditions of operation of the elevator and reduces its reliability.

Purpose-; invention - improving operating conditions and improving the reliability of the elevator.

This is achieved by the fact that the speed limiter cable is connected to the counterweight by the end of one branch and the second branch to the cabin by means of a device attached to it to adjust the tension of the rope, made in the form of spring-loaded slips with a screw rod connected to the end beige rope.

FIG. 1 shows the proposed elevator, a general view; in fig. 2 - an upper element 1 with a device for adjusting the tension of the rope.

The elevator consists of a cab 1 and a counterweight 2, installed in the driveway on the guides 3 and suspended at the ends of the pull rope 4, enveloping the driver-driving pulley 5 of the drive 6, and speed limiter 7 with the pulley B. bending around it

One of the branches of the rope 8 is fastened with the fastening element 9 to the lever 10 of the mechanism for switching on catchers 11 and 12 mounted on the cab 1.

Claims (2)

The switching mechanism, catchers, kinematically linking speed limiter 7 with catchers 11 and 12, includes levers 10 and 13. Connected with spring 14 by means of spring 14, the leg 15, on which the stop 16 is attached, interacting with the driver 17. 3 The rope 8 is connected via the spring 18 by the end of one leg with the counterweight 2, and the end of the second leg is connected to the cab 1 by means of a device attached to it to adjust the tension: the rope, made in the form of spring-loaded (by means of spring 19) suspension 20 con ohm of the rope 8 screw screw 21 and preloaded with the help of nuts 22. On cab I, there is a locking contact 23 with a gap in relation to the aperture 20 acting on the contact 23 when pulling the cables, and the drive 6 is disconnected by means of the contact 23 works as follows. When clockwise pin 5 rotates clockwise, cab I lowers. At the same time, the lever 10, lowering together with the cabin 1 t, no rope 8 downwards, which actuates the limiter, speed 7, caused it to rotate clockwise. The tension of the rope 8 is secured by springs 18 and 19. In the event that the cab moves downward at a speed exceeding the allowable (for example, if the haul rope breaks or looses), the speed limiter, having reached the critical number of revolutions, turns its pulley stops, and the rope 8 stops and raises the levers 10 and 13 upward, causing the cabin to sit on the And and 12 locks while simultaneously disconnecting the drive motor 6 using the switch 17. In weakening the rope 8 due to its stretching, the exhaust 20.to a blocking contact 23, which turns off the drive motor 6. The tension adjustment of the rope 8 is made by rotating the nuts 22. The positive effect of the invention is that, by eliminating the tensioning device of the rope, the speed limiter is released when the shaft is wet, which improves the operating conditions . The presence of a device for adjusting the tension of the rope increases the reliability of operation and improves the operating conditions of the elevator; Claim 1. Lift containing a cabin and a counterweight installed in the shaft on guides and lights at the ends of the hauling rope, enveloping the traction driving pulley of the drive, and speed limiter with a rope of two branches, one of which is connected to the lever of the switching mechanism via fasteners catchers mounted on the cabin, characterized in that, in order to improve the operating conditions and increase reliability, the speed limiter cable is connected to the counterweight by the end of one leg with a spring and Ora branches - cab fixed thereon by the device for adjusting the tension of the rope. 2. An elevator according to claim 1, characterized in that the device for adjusting the tension of the rope is made in the form of a spring-loaded branch with a screw rod connected to the end of the haul rope. Sources of information taken into account during the examination 1. M. Brodsky. Safe operation of elevators. M., Nedra 1975, p. 11-28, fig. 4, 16, 17.