JP2021017329A - Rope damping device and rope damping mechanism for elevator - Google Patents

Abstract

To provide a rope damping device and a rope damping mechanism for elevators that can effectively suppress the swaying of a main rope with a simple configuration.SOLUTION: There is provided a rope damping device 21 for elevators that suppresses the swaying of a main rope 5, which is passed over a hoist sheave 3 installed in a machine room 2 and connects a car 6 to a suspended weight 7, comprising a frame portion 21a provided through a rope hole 10 on the floor surface of the machine room 2, fixed to the floor surface via a fulcrum portion 21d, and swingably attached with the fulcrum portion as a fulcrum, an upper roller 21b rotatably installed on the frame portion 21a above the floor surface of a machine room floor 8, and a lower roller 21c rotatably installed below the frame portion 21a penetrating the floor surface of the machine room floor 8, which is larger than the roller diameter of the upper roller 21b and heavier than the weight of the upper roller 21b.SELECTED DRAWING: Figure 2

Description

Embodiments of the present invention relate to a rope damping device and a rope damping mechanism of an elevator.

The main rope of the elevator is hung over the sheave of the hoist and connects the cage and the balance weight. If the main rope sways while the elevator is in operation, it will affect the ride quality.

In recent years, as the height of buildings has increased, the main ropes of elevators have also become longer. The longer the main rope, the greater its sway.

Japanese Patent No. 5658357

In particular, if the building sways due to the occurrence of strong winds or earthquakes, and the main rope sways significantly with it, the operation of the elevator will be hindered. Therefore, a proposal for effectively suppressing the shaking of the main rope is desired.

An object of the present invention is to provide an elevator rope damping device and a rope damping mechanism capable of effectively suppressing the swing of a main rope by a simple configuration.

An embodiment of the present invention is an elevator rope vibration damping device that is passed over a sheave of a hoist installed in a machine room and suppresses the shaking of a main rope that connects a cage and a balance weight. A frame portion that is provided through a rope hole on the floor surface, is fixed to the floor surface via a fulcrum portion, and is swingably attached with the fulcrum portion as a fulcrum, and the frame portion above the floor surface of the machine room. The upper roller rotatably installed in the frame and the upper roller rotatably installed below the frame penetrating the floor of the machine room, which is larger than the roller diameter of the upper roller and heavier than the weight of the upper roller. It is an elevator rope vibration damping device equipped with a lower roller.

Further, a pair of rope damping devices are provided, and each rope damping device is a rope damping mechanism installed in a rope hole on the floor surface facing each other with the main rope in between.

The block diagram of the elevator to which the rope damping device and the rope damping mechanism of the elevator which concerns on embodiment are applied. The perspective view which shows the structure of the rope vibration damping device of the elevator which concerns on 1st Embodiment. The operation explanatory view of the rope vibration damping mechanism which applied the rope vibration damping device of the elevator shown in FIG. The perspective view which shows the rope vibration damping mechanism which comprises the rope vibration damping device of the elevator which concerns on 2nd Embodiment. The operation explanatory view of the rope vibration damping mechanism of the elevator shown in FIG.

As shown in FIG. 1, in the elevator to which the rope damping device and the rope damping mechanism of the elevator of the embodiment are applied, the main rope 5 is driven by the hoisting machine sheave 3 and the deflecting sheave 4 provided in the machine room 2. doing. The main rope 5 connects the car 6 and the balance weight 7.

The machine room floor 8 of the machine room 2 is provided with a rope hole 10 for hanging a main rope on a hoistway 9. As will be described later, the rope vibration damping device and the rope damping mechanism according to the embodiment are installed in the rope hole 10.

[First Embodiment]
FIG. 2 shows the configuration of the rope damping device to which the first embodiment is applied.

As shown in FIG. 2, the rope damping device 21 includes a frame portion 21a composed of a pair of left and right vertical frames, an upper roller 21b rotatably arranged between the vertical frames of the frame portions 21a by a shaft 21h, and a frame portion. Below 21 is provided with a lower roller 21c rotatably arranged by a shaft 21j between the vertical frames of the frame portion 21a.

Further, the rope vibration damping device 21 is fixed to the machine room floor 8 by a mounting hole 21e of a mounting seat 21g provided at a position serving as a fulcrum portion 21d, and is provided through the rope hole 10. A round bar 21f is arranged between the vertical frames of the fulcrum portion 21d of the rope vibration damping device 21, and can swing around the fulcrum portion 21d in a pendulum shape.

The roller diameter of the lower roller 21c is larger than that of the upper roller 21b, and its weight is also heavy. Further, the distance from the lower roller 21c to the fulcrum portion 21d is longer than the distance from the upper roller 21b to the fulcrum portion 21d.

As shown in FIG. 3, a pair of rope damping devices 21 shown in FIG. 2 are provided, and each rope damping device 21 is a rope installed in a rope hole 10 of a machine room floor 8 facing each other with a main rope 5 in between. The vibration damping mechanism 30 is configured.

Next, the operation of the first embodiment will be described with reference to FIG.

A pair of rope damping devices 21 are installed in the rope holes 10 with the main rope 5 in between, and the rope damping mechanism 30 is configured.

When there is no shaking (vibration) in the main rope 5, as shown by all lines in the figure, the main rope 5 repeats vertical movement without contacting each rope vibration damping device 21.

When the main rope 5 sways like the orbit 22 as shown by the alternate long and short dash line in the figure due to the occurrence of an earthquake or the like, each rope damping device 21 pendulums around the fulcrum portion 21d as the rope 5 sways. It swings like a rock. When the main rope 5 comes into contact with the upper roller 21b and the lower roller 21c, the upper roller 21b swings in the direction opposite to the swing direction of the lower roller 21c. That is, as shown by the arrows in the figure, a force is applied to each rope damping device 21 from the lower roller 21c toward the upper roller 21b. Due to this force, the upper roller 21b swings in a direction of suppressing the shaking (vibration) of the main rope 5 and suppresses the shaking (vibration) of the main rope 5. At this time, the lower roller 21c is larger than the upper roller 21b, and its weight is also heavier. Further, the distance from the lower roller 21c to the fulcrum portion 21d is longer than the distance from the upper roller 21b to the fulcrum portion 21d. Therefore, the swing width when the main rope 5 swings can be effectively reduced.

In the first embodiment, the rope damping mechanism 30 is composed of a pair of rope damping devices 21, but the rope damping mechanism 30 does not necessarily have to be a pair. By installing one rope damping device 21 in the rope hole 10, it can be expected that the main rope 5 is suppressed from shaking.

[Second Embodiment]
4 and 5 show the configuration of the second embodiment.

In the second embodiment, a pair of rope damping devices 21 are provided, each rope damping device 21 is installed in the rope hole 10 facing each other with the main rope 2 in between, and both rope damping devices 21 are on the lower side. The rope damping mechanism 31 is configured by being connected in the vicinity of the rollers 21c.

To connect the two vibration damping devices 21, the two frame portions 21a are bolted together by the roller connecting tool 32. Since the configuration of each rope vibration damping device 21 is the same as that described with reference to FIG. 2, the description thereof will be omitted.

Next, the operation of the second embodiment will be described with reference to FIG.

When there is no shaking (vibration) in the main rope 5, as shown by all lines in the figure, the main rope 5 repeats vertical movement without contacting each rope vibration damping device 21.

When the main rope 5 sways like the orbit 22 as shown by the alternate long and short dash line in the figure due to the occurrence of an earthquake or the like, each rope damping device 21 pendulums around the fulcrum portion 21d as the rope 5 sways. It swings like a rock. At this time, since the two vibration damping devices 21 are connected by the roller connector 32 to form the rope damping mechanism 31, even if a plurality of main ropes 5 sway apart, the lower roller 21c It is possible to absorb the disjointed shaking and reduce the shaking width.

As described above, according to the second embodiment, the same effect as that of the first embodiment can be obtained, and the swing of the main rope can be further reduced.

Although some embodiments of the present invention have been described above, these embodiments are presented as examples and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other embodiments, and various omissions, replacements, and changes can be made without departing from the gist of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are also included in the scope of the invention described in the claims and the equivalent scope thereof.

2 ... Machine room, 3 ... Hoisting machine sheave, 4 ... Displacement sheave, 5 ... Main rope, 6 ... Basket, 7 ... Balance weight, 8 ... Machine room floor, 9 ... Hoistway, 10 ... Loop hole, 11 ... Compen Rope, 21 ... Rope damping device, 21a ... Frame part, 21b ... Upper roller, 21c ... Lower roller, 21d ... Supporting point, 21e ... Mounting hole, 21f ... Round bar, 21g ... Mounting seat, 21h, 21j ... Shaft , 22 ... Main rope trajectory, 30, 31 ... Rope damping mechanism

Claims (4)

It is a rope damping device for elevators that suppresses the shaking of the main rope that is passed over the sheave of the hoist installed in the machine room and connects the cage and the balance weight.
A frame portion provided through a rope hole on the floor surface of the machine room, fixed to the floor surface via a fulcrum portion, and swingably attached with the fulcrum portion as a fulcrum.
An upper roller rotatably installed in the frame portion above the floor surface of the machine room, and
A lower roller that is rotatably installed below the frame portion that penetrates the floor surface of the machine room, is larger than the roller diameter of the upper roller, and is heavier than the weight of the upper roller.
Elevator rope damping device equipped with. In the rope vibration damping device according to claim 1,
An elevator rope damping device in which the distance from the lower roller to the fulcrum is longer than the distance from the upper roller to the fulcrum. A rope damping mechanism comprising a pair of rope damping devices according to claim 1 or 2, and each rope damping device is installed in a rope hole on the floor surface so as to face the main rope in between. The rope damping device according to claim 1 or 2 is provided, and each rope damping device is installed in a rope hole on the floor surface facing each other with the main rope in between, and both rope damping devices are provided. A rope damping mechanism connected near the lower roller.

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