JPS5836872A - Preventive device for vibration of elevator - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION This FiA relates to a vibration prevention device for preventing vibrations occurring in an elevator.

FIG. 1 shows a schematic configuration of a conventional elevator.

In Figure 1, / is the car compartment, C is the car frame that supports the car compartment, jJd is the car frame at one end, 4-p is connected to 2 to hang the car compartment l and the car frame, and da is the car frame that supports the car compartment. A hoisting member for lifting the rope 3 to raise and lower the car, S is a suspension weight connected to the other end of the row 13 to balance the weight of the car, etc., and O is the row 13. This is a diversion wheel for installing the vehicle by deflecting it.

FIG. 2 shows in more detail the structure of section A surrounded by the broken line in FIG. 1. In Figure 2, Ri is rope 3
The shackle spring inserted between the car frame and the car frame is a spring seat for connecting the shackle spring 7 and the rope 3.

The elevator configured in this manner raises and lowers the car room 1 by winding up the rope 3 with the hoisting machine. Generally, a hoisting machine with a gear mechanism generates vibrations due to the meshing of the gears. This vibration excites the rope 3, and may match the natural frequency of the rope 3 and resonate.

If resonance occurs in the rope 3, large vibrations and noise will be generated in the cabin/room where the rope is suspended, causing discomfort to passengers. The natural frequency of the rope 3 is mainly determined by the length of the rope 3, the spring constant of the shackle spring, and the weight of the car room/car frame. Since the weight of the cab l changes depending on the position and the number of passengers, as a result, the natural frequency of the rope 3 is distributed over a wide range of frequencies. Therefore, it was inevitable that the frequency of the hoisting member and the natural frequency of the rope 3 would match and resonate.

In the conventional elevator, the car compartment/
In order to prevent large vibrations from occurring in the rope 3, a shackle spring 7 is inserted into the connection point between the rope 3 and the car frame.
This prevents vibrations from being transmitted to the cab. However, this conventional means has no effect of preventing the resonance of the rope 3, so the resonance of the rope 3 still occurs, and the effect of preventing the vibration generated in the cab l is only slight. There wasn't.

This invention was made in order to eliminate the above-mentioned drawbacks of the conventional ropes, and by making the natural frequencies of the ropes 3, which are composed of a plurality of ropes in combination, different for each rope, To provide an elevator vibration prevention device that can prevent all of the above from resonating with the vibration of the hoisting machine at the same time, and as a result can eliminate vibrations generated in the car.

An embodiment of the present invention will be described below with reference to the drawings. The difference between this invention and the configuration of the prior art is that the structure shown in FIG. 1 is broken! Since this is only part A, only this part will be explained. In FIG. 3, a weight 9 is inserted between the rope 3 and the car frame, is attached to each p-b 3 of the shackle spring A, which has a different spring constant for each row 13, and has a different weight, /l is a friction material inserted between adjacent weights 10, l, 13, /4' are springs and bolts for tightening all weights IO and all friction materials // to a certain set surface pressure. , indicates Natsuto. In addition, in all the weights 10VC, the hole through which the bolt /3 passes is large enough to allow the weight IO to sufficiently vibrate in the direction of P.

In the elevator according to the present invention configured as described above, the shackle spring A9 inserted between the rope 3 and the car frame is different for each rope 3, and the weights IO of different weights are provided at the ends of the ropes 3. Therefore, the natural frequencies of each rope 3 have different values. Therefore, when the hoisting machine DA winds up the rope 3, even if vibration is generated in the hoisting machine and is transmitted to the rope 3, the natural frequencies of the rows 13 are different.
The resonance of No. 3 occurs in a dispersed manner. Therefore, all row 1
3 can be prevented from resonating at the same time, and as a result, vibration of the cage due to the resonance of the rope 3 can be prevented. Also,
According to the present invention, even if resonance occurs in one rope 3, the resonance can be suppressed to a small level due to the vibration damping effect of the friction material /l when the weight IO of the rope 3 vibrates alone in the P direction. . Furthermore, it goes without saying that small vibrations of the rope 3 are prevented from being transmitted to the car frame by the shackle spring A9.

In addition, in the above implementation row, for each rope 3, the shackle spring A9 having a different spring constant and the weight 10 having a different weight are used in combination at the same time. A weight /θ with the same weight as shackle spring A9 with a different constant, or a shackle spring A with the same spring constant as a weight lθ with a different weight? may be used in combination.

As described above, according to the present invention, the resonance generated in the rope 3 is dispersed and the vibration of the rope 3 is easily damped, so that the vibration generated in the car can be reduced and the elevator ride can be improved. There is an effect that can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a schematic configuration diagram showing a conventional elevator, FIG. 2 is a sectional view showing a conventional elevator vibration prevention device, and FIG. 3 is a sectional view showing an elevator vibration prevention device according to an embodiment of the present invention. be. C...Car frame, 3...Rope, t...Shackle spring A, 10...Weight, l/...Friction material, /C...
...Spring, /3...Bolt, /Dan...Nut. In the figures, the same reference numerals indicate the same or corresponding parts. Agent Shin Kuzuno −

Claims (3)

[Claims] (1) A plurality of shackle springs with different spring constants, weights with the same number of shackle springs but different weights, a friction material inserted between the weight sands, and a fixture for tightening all the weights are provided. An elevator vibration prevention device characterized by a car frame suspended from a rope. (2) The vibration prevention device for an elevator according to claim 1, which uses a plurality of shackle springs having the same spring constant. (3) Claim 1 using weights of equal weight
Anti-vibration device for elevators as described in .