SU872422A1 - Tensioning device for counterweight ropes of lift - Google Patents

Description

(54) STRETCH DEVICE FOR EQUALIZING EQUALIZERS

one

This invention relates to a lifting machinery industry, in particular tensioning devices for balancing elevator ropes.

A known device for balancing elevator ropes, comprising a block covered by a rope, the axis of which is mounted on a frame, having a mechanism for fixing it relative to the guides of the elevator car l.

A disadvantage of the known device is that the design of the locking mechanism, including the inertial mass, provides for its movement upwards, and with it the tensioning device, as one of the conditions for its operability. This explains the fact that there is a jump in the counterweight during the time until the tensioning device stops on the guides.

In addition, during the operation, whether}) there may be cases of untimely triggering of the locking mechanism during an abrupt rest of the elevator car.

ROPES LIFT

for example, stopping the elevator drive with one of the locking devices, listening to the passenger for the stop button, etc., by listening to the passenger, and counterweight while jerking up, indicates acceleration to the tension device and fixes it on the guides. The likelihood of an arbitrary engagement of the F1-S mechanism increases at high nominal elevator speeds.

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The purpose of the invention is to increase reliability.

To achieve this goal, the fixation mechanism is rigidly mounted on the axis of the specified block and kinematically

15 is connected by means of spring-loaded gi and a system of levers with hingedly mounted on the frame locking elements with spring-loaded stops, which interact with the grooves, which are made on rails.

In addition, the locking mechanism is designed as a centrifugal type speed limiter. 3 In FIG. 1 shows an elevator with compensating cables and tensioning devices; a general view; in fig. 2 - tension device, general view; in fig. 3 is a left side view of FIG. 4 shows section A-A in FIG. 2; in fig. 5 is a section bB in FIG. 4; in fig. tensioning device, the initial state in fig. 7 - the same, working condition; in fig. 8 is a section bb of FIG. 7; in fig. 9 — node I in FIG. 6. Compensating cable 1. suspended from cab 2 and counterweight 3, bends around block 4 of tension device 5 installed between rails 6. Block 4 is seated on axis 7 between the cheeks of frame 8; The axis 7 also has a speed limiter 9 fitted, the body 10 of which is fixedly connected to the sleeve 1 of the axis 7 planted on the tongue 12. The unit 4 transmits rotation to the sleeve 14 through the tongue 13. The support 15 is screwed onto it with screws 16 17, connected by means of spring-loaded gates 18. A tooth 19 is mounted in the housing 1O. At the opposite end of the axis 7 a ball-type safety clutch 2O is seated, one of the half-body 21 of which is pressed by the spring 22 and rigidly connected to the axis 7, and the other half coupling 23 has a leash 24 to which it is hingedly attached a 25. Spring 26 with one end rests against nuts 25 screwed on a bar and 25 into a bracket 28 fixed on frame 8 and having an opening through which the cable passes 25. 25. The other end of cable 25 is connected to a system of levers 2 which includes the rocker ZO and ti 31 and 32, connected with breadcrumbs 33. On the axis 34 of the cracker 33, the earrings 35 are fixedly mounted, to which the locking elements 36 are hingedly hinged. The body 37, the spring 38 and the stop 39 whose tooth has a contour of grooves made in the guides .6. The tensioning device operates as follows. When the cab moves downward, the block 4 rotates in the direction of the arrow (Fig. In this case, the stops 39 are in the initial position, i.e. they are retracted from the guides 6. Block 4 through the tongue 13 Transmits the rotation to the sleeve 14 and through the support 15 to the weights 17 (Fig 4, 5 and 7). When the cabin 2 exceeds the nominal speed of the load 17 under the action of centrifugal force, it overcomes the resistance of the spring seated on the pull 18. At the same time the load 17 hooks one of the teeth 19 fixedly on housing 10. The housing 10 begins to rotate and through the axis 7, ball valve safety The coupling sleeve 20, tgu 25 and the system of levers 29 transfers the elements 36 from the initial position to the working position (Fig. 7). The stop 39 enters the groove of the guide 6 and stops the tensioning device 5, preventing it from moving upwards, thereby eliminating the jump In case of landing the cabin on catchers. 11 After transferring the locking elements 36 from the initial position to the working position, the safety clutch 2O is activated, thereby breaking the rigid connection between the block 4 and the locking elements 36. The spring 38 entering the locking element assembly 36 designed to seamlessly pores 39 from the initial position to the working position if the tooth of the stop 39 hits the protrusion of the guide 6. With sfoM, the locking element 36 moves towards the guide 6, compressing the spring 38. When lifting the tension device, the stop 39 moves the protrusion of the guide 6 and falls into its groove (in FIG. 9 is shown by a dotted line), thus preventing further tensioning of the tensioning device 5. The speed limiter 9 of the tensioning device 5 is set to a smaller excess of the nominal speed than that of the cabin 2. Therefore, when the cabin 2 is landing, the tensioner 5 is in the working position, i.e. in the position with the stops 39 inserted (in Fig. 9 is shown by a dotted line.). To transfer the stops 39 from the working position to the initial position, it is necessary {1 to place the cab 2 in the upward movement mode. In this case, the block 4 rotates in the direction opposite to the arrow (FIG. 7). The load 17 leaves the engagement with the housing 10 and the spring 26 returns the locking elements 36 to the initial position. The use of a tension device eliminates the jump of the counterweight, as well as the tension device itself, and thereby eliminates the possibility of dynamic loads on the Elevator elements, which increases the reliability of its operation. In addition, the design of the proposed tensioning device makes it possible to avoid spontaneous fixing it on the directions.

Claims (2)

Invention Formula 1, Tensioning device for balancing elevator ropes, comprising a rope-covered block, the axis of which is mounted on a frame having a mechanism for fixing it relative to the guides for the elevator car, characterized in that, in order to improve reliability, the fixation mechanism is mounted on the axis of the specified block ka and is kinematically connected by means of spring-loaded gi and a system of levers with hingedly mounted on the frame retaining elements with spring-loaded stops, interacting with grooves, which are designed on one hand. . 2. The device according to claim 1, wherein the locking mechanism is made in the form of a centrifugal-type speed limiter. Sources of information taken into account in the examination 1. US patent No. 3653467, CL, 187-22, published. 1972 (prototype). (rig. 3 BB 3 //////////// Л / 7 ////// Л 39/7 fiye.9