JPS582177A - Elevator vibration isolator - 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 The present invention relates to a vibration isolator for an elevator, and more particularly to a vibration isolator that is convenient for suppressing vibration of a plurality of ropes for suspending an elevator.

Generally, as shown in Figs. 1 and 2, in a conventional elevator, a plurality of lobes 3 are wound around a sheep 2 of a hoist l installed in a machine room at the top of the hoistway, and the elevating body is attached to both ends of the sheep 2. A rider 4 and a counterweight 5 are suspended. The drive motor 6 and reducer 7 of the hoisting machine l operate the 7-
The robot 2 is rotated to move the elevating body up and down.

Incidentally, the connection between each elevating body and the lobe 3 is actually made by a hanging rod 8.9 connected to both ends of the lobe 3, and a hanging frame body 12 that supports the rider 4 and the counterweight 5, which are the elevating body.
．． 13.

That is, the hanging rods 8 and 9 are passed through the hanging frame 13.13, and coil springs 10.11 are fitted and fixed on the hanging rods 8 and 9, respectively, so that the weight of the lifting body is reduced by each spring io.
, ti, and is supported by the rope 3.

In the elevator configured in this manner, rotational pulsations caused by the hoist 1 occur during operation, and the rope 3 is vibrated in the up-and-down direction, thereby transmitting vibrations to the seats 4. In particular, when the natural frequency of the rope 3 coincides with the frequency of the rotational pulsation, the ride comfort becomes significantly worse.

Therefore, in order to suppress the resonance of the rope 3, for example, a common leaf spring 14 is attached to the lower ends of the plurality of hanging rods 8 that are elastically suspended through the hanging frame 12, and A weight 15 is attached to the spring 14, and this weight 1
It has been proposed to make the natural frequency determined by the mass of the rotor 5 and the spring constant of the leaf spring 14 coincide with the frequency of the rotational pulsation.

However, in the above configuration, since the plurality of ropes 3 are simultaneously suppressed by re-imaging, the weight must be made heavy, and as a result, the above device becomes large.
Since it requires a lot of installation space, it has the disadvantage of poor installation workability. In addition, it is extremely difficult to make the plurality of ropes 3 so that their natural frequencies are the same, and it is therefore difficult to simultaneously suppress the resonance of all the ropes using the above-mentioned device.

The present invention addresses the above-mentioned problems, and its purpose is to provide a compact elevator vibration isolator that is easy to install and that can individually suppress resonance of ropes.

In order to achieve the above-mentioned object, the present invention makes the husbands of a plurality of hanging rods on which the elevating body is suspended via elastic bodies support weights via elastic bodies.
,・U・□・ An embodiment of the present invention will be described below with reference to FIG. On the penetrating side of the plurality of hanging rods 8 passing through the hanging frame 12,
A cylindrical anti-vibration rubber (for example, a loss coefficient of 0.05 to 0.3) 16 having a large internal loss is fitted, and then the position of the anti-vibration rubber 16 is determined by screwing in the nuts (N) respectively. With this configuration, the hanging frame 12 is suspended by the hanging rod 8 via the vibration isolating rubber 16.

Further, a fine adjustment weight 20 is attached to the lower end side of each hanging rod 8. Weight 19. Fit the mounting plate 17 and position it with the arrow)n. Then, between the mounting plate 17 and the weight 19, an appropriate internal loss (for example, a loss coefficient of 0.05 to 0
．． The vibration absorbing device 21 is constructed by interposing a plurality of cylindrical vibration isolating rubbers 18 having the structure 1). In addition, vibration-proof rubber 16 and weight 1
9.20 each has a through hole 16H through which the hanging rod 8 passes.
919H and 20H are provided to prevent deformation of the anti-vibration rubber 16 due to load and attachment and detachment of the weights 19 and 20.

I try not to obstruct movement.

In the above configuration, the natural frequency determined by the spring constant of the vibration isolating rubber 18 and the mass of the weight 19.20 is selected to match the frequency of the rotational pulsation described above.

With this configuration, even if the rope resonates due to the rotational pulsation of the 7-pipe of the hoist and the vibration is transmitted to the hanging rod 8, the vibration isolating rubber 16, which has a large internal loss, is first affected.
Due to the deformation loss, resonance of the hanging rod 8, that is, the rope is suppressed. Incidentally, compared to the conventional spring (Fig. 2), resonance can be suppressed to a fraction of that.

Therefore, even if the vibration energy due to the resonance of the weights 19 and 20 is reduced, the vibration of the hanging rod 8 can be suppressed to a level equal to or higher than that of the conventional one. It can also be made smaller and requires less installation space. Further, since the natural frequency of the rope can be selected for each hanging rod 8, resonance of the rope can be efficiently suppressed, and the vibration isolating rubber 18 and the weights 19, 20 can be standardized.

By the way, in the above embodiment, the vibration isolating rubber 18 and the weight 19.2
! The vibration absorbing device 2.1 is composed of the vibration isolating rubber 1 and
A similar effect can be obtained by using a metal plate spring or coil spring instead of 8.

It goes without saying that the present invention can be applied not only to the resonance of the rope on the car side, but also to the case of suppressing the resonance of the rope on the counterweight side.

As explained above, the present invention suspends the elevating body from a plurality of hanging rods via a first elastic body, and supports a weight on each of the plurality of hanging rods via a second elastic body. As a result, the resonance of the plurality of ronibs can be suppressed individually, and most of the resonance of the rope can be suppressed by the first elastic body, so that the combination of the second elastic body and the weight can be made smaller and lighter. , and along with this, the second
Since the installation space for the elastic body and weight is small,
It is possible to provide an elevator vibration isolator that is easy to install.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing the overall configuration of an elevator, FIG. 2 is a diagram showing a main part of a conventional elevator vibration isolator, and FIG. 3 is a diagram showing a main part of an elevator vibration isolator according to the present invention. 1... Hoisting machine, 2... Sheave, 3... Rope, end... Vibration isolating rubber for hanging, 19... Weight, 20... Fine adjustment weight 1 Fig. 1 20 S 1i! 30

Claims (1)

[Claims] 1. Hoisting machine installed at the top of the hoistway and 7 of the hoisting machine
- A plurality of ropes wrapped around the rope, a hanging rod connected to each of the hanging ends of the plurality of ropes, and a first elastic body suspended from these hanging rods and movable in the vertical direction. An elevator comprising: a hanging frame guided by the lifting frame; weights supported by each of the lifting rods via a second elastic body; and an elevating body supported by the hanging frame. Anti-vibration device. 2. In claim F1Bg1, the first
A vibration isolating device for an elevator, characterized in that the elastic body is made of vibration isolating rubber. 3. A vibration isolating device for an elevator according to claim 1, wherein the second elastic body is made of vibration isolating rubber. 4. The vibration isolating device for an elevator according to claim 1, wherein the first elastic body is made of vibration isolating rubber, and the second elastic body is made of a metal spring. 5. The vibration isolating device for an elevator according to claim 1, characterized in that the weight of the weight is adjustable.