JP6819752B1 - Main rope runout suppression device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a runout suppressing device for a main rope capable of reducing the magnitude of noise transmitted in a car during operation. SOLUTION: A runout suppressing device 30 is attached to a support portion 32 attached to a car side main rope group 12A above the car 14 and a car side main rope group 12A above the support portion 32, and is attached to the support portion 32. The runout suppressing units 42 and 48 for suppressing the runout of the rope group 12A by pulling the runout suppressing ropes R1, R2, R3 and R4 connected to the rope group 12A are provided. [Selection diagram] Fig. 2

Description

The present invention relates to a main rope runout suppression device, and more particularly to a main rope runout suppression device that suppresses main rope runout caused by shaking of a building in which an elevator is installed due to an earthquake or the like.

In recent years, as the height of buildings has increased, the runout of the main rope has become a problem in rope-type elevators when the building shakes due to an earthquake or strong wind.

Rope-type elevators installed in high-rise buildings often have a machine room directly above the upper part of the hoistway of the car, and a hoisting machine for driving the car is installed in the machine room. A main rope is hung on the sheave that forms part of the hoist, and a car is connected to one end side of the main rope and a balance weight is connected to the other end side, and each is suspended by the main rope. It has been lowered.

Then, by rotating the sheave in the forward or reverse direction by the prime mover, the car guided by the pair of car guide rails laid in the vertical direction is raised and lowered.

In an elevator with such a configuration, for example, when a building sways due to long-period ground motion, the main rope that suspends the car from the top of the building also sways in the horizontal direction in almost the same direction as the sway of the building (hereinafter, this horizontal direction). The runout of the main rope is called "lateral runout").

Conventionally, the magnitude of the runout of the main rope is estimated from the magnitude of the shake of the building detected by the long-period vibration detector installed in the building, and the elevator depends on the degree of the runout of the main rope. The control operation of the elevator is being carried out, and the operation of the elevator is temporarily suspended.

However, there is a problem that the normal operation of the elevator cannot be resumed until the runout of the main rope converges even after the runout of the building has subsided. In addition, when the main rope resonates with the frequency of building shaking caused by an earthquake or strong wind, it is possible that the main rope swings greatly. In such a case, the main rope may come into contact with the equipment installed in the hoistway and be damaged. Further, if the equipment is damaged, repair work by a maintenance person or the like is required, so that there is a problem that it takes a longer period of time to restart the normal operation.

Patent Document 1 states that the rope is connected to a clamp attached to the main rope, and both ends of the rope extend diagonally downward from the clamp and are hung on pulleys installed at opposite corners on the upper surface of the car. Disclosed is a runout suppression device for a main rope that vibrates a clamp by pulling a runout suppression rope connected to an actuator (runout suppression portion) in the center of the upper surface with the actuator to suppress lateral runout of the main rope. There is.

Japanese Unexamined Patent Publication No. 3-51279

In the runout suppressing device for the main rope described in Patent Document 1, since the runout suppressing portion is installed on the upper surface of the car, the operating noise of the suppressing portion is easily transmitted to the inside of the car. Therefore, there is a problem that the noise in the car tends to increase when the runout suppressing device of the main rope is activated along with the lateral runout of the main rope.

An object of the present invention is to provide a runout suppressing device for a main rope that can reduce the magnitude of noise transmitted into a car during operation.

The main rope runout suppression device of the present invention is a runout suppression device that suppresses the runout of the main rope when the main rope that suspends the elevator car is shaken, and is attached to the main rope above the car. It is characterized by including a support portion and a runout suppression portion that is attached to a main rope above the support portion and suppresses runout of the main rope by pulling a runout suppression rope connected to the support portion. ..

In the runout suppression device of the main rope of the present invention, the runout suppression unit may include a pulley over which the runout suppression rope is laid and a drive unit that rotationally drives the pulley.

In the runout suppressing device of the main rope of the present invention, the runout suppressing portion may be configured to suppress the runout of the main rope in two orthogonal directions.

According to the runout suppressing device of the main rope of the present invention, the runout suppressing portion attached to the main rope pulls the runout suppressing rope connected to the support portion to suppress the lateral runout of the main rope. In this configuration, even if the runout suppressing portion operates due to the lateral runout of the main rope, the operating noise of the runout suppressing portion is difficult to be transmitted to the inside of the car because the runout suppressing portion is attached to the main rope. As a result, it is possible to reduce the amount of noise transmitted to the inside of the car when the runout suppressing portion operates due to the lateral runout of the main rope.

It is an overall block diagram of the elevator to which the runout suppression device of a main rope which is one Embodiment of this invention is applied. It is a figure which shows the perspective view when the runout suppression device of the main rope shown in FIG. 1 is viewed obliquely from the rear, and the plan view of the support portion included in the runout suppression device of the main rope in a circle. FIG. 3A is a diagram partially showing a configuration of a runout suppressing device for the main rope and a partially enlarged view around the pulley when viewed from the direction A shown in FIG. FIG. 3B is a partial cross-sectional view showing the configuration of a drive unit included in the runout suppressing device of the main rope. It is a figure which includes the figure which shows the structure of the runout suppression device of the main rope and its periphery when the runout occurs in the main rope group, and the partially enlarged view which shows the state of the runout suppression device of the main rope included in the figure. ..

Hereinafter, the elevator 10 to which the main rope runout suppression device according to the embodiment of the present invention is applied will be described with reference to the drawings. In each figure, "X" shown in the figure indicates a horizontal direction X parallel to the axial direction of the tension wheel 19, "Y" indicates a horizontal direction Y orthogonal to the horizontal direction X, and "Z" is horizontal. It is assumed that the vertical direction Z perpendicular to the directions X and Y is indicated.

FIG. 1 is a diagram showing a schematic configuration of an elevator 10. In FIG. 1, the main rope group 12 is shown as one rope for simplification of illustration. As shown in FIG. 1, the elevator 10 is a traction type rope type elevator, and is one end side of a main rope group 12 composed of a plurality of main ropes 12-1, 12-2, 12-3 (see FIG. 2). The car 14 is hung on the vehicle, and the balance weight 15 is hung on the other end side.

Further, as shown in FIG. 1, a runout suppressing device (hereinafter, referred to as "runout suppressing device") 30 of the main rope is attached to the main rope group 12 above the car 14. Further, the car 14 is configured to be able to move up and down in the vertical direction Z along a pair of guide rails (not shown) provided on the wall surface of the hoistway 17 corresponding to the car 14. Similarly, the balance weight 15 is also provided so as to be able to move up and down in the vertical direction Z along a pair of guide rails (not shown) provided corresponding to the weight 15.

Further, the car 14 has one end of a main rope group 12 whose suspended weight varies depending on the elevating position of the car 14 and a compensating rope 16 having a function of compensating for weight imbalance of a traveling cable (not shown). Is connected. The compensation rope 16 is bridged over a tension wheel 19 installed in a pit 17-1 which is the bottom of the hoistway 17, and the other end side is connected to the lower end of the balance weight 15.

The main rope group 12 is bridged over the sheave 18A and the deflector 18B of the hoisting machine 18 installed in the machine room M directly above the hoistway 17, and the sheave 18A is driven by a hoisting machine motor (not shown). It has a function of relatively raising and lowering the car 14 and the counterweight 15 by rotating forward or reverse. Further, the machine room M is provided with a control unit 20 that comprehensively controls the operation of the hoisting machine 18 and the like and the operation of the runout suppressing device 30. In the present embodiment, the operation of the runout suppressing device 30 is controlled by the control unit 20 provided in the machine room M, but the present invention is not limited to this. For example, a control unit that controls the operation of the runout suppression device 30 may be provided on the upper surface 14R of the car 14. In the present embodiment, the case where the number of main ropes is three is described as an example, but the number of main ropes may be less than three or more than three. ..

In the following explanation, the part of the main rope group 12 in which the car 14 is suspended is referred to as the car side main rope group 12A, and the part in which the balance weight 15 is suspended is required to be the balance weight side main rope group 12B. Called according to. According to the above definition, the lengths of the car-side main rope group 12A and the balance weight-side main rope group 12B occupying the main rope group 12 vary depending on the elevating position of the car 14. The car-side main rope group 12A shown by the alternate long and short dash line in FIG. 1 schematically shows an example of the state when the car-side main rope group 12A swings sideways (detailed in the latter part).

Further, the control unit 20 detects the runout of the car side main rope group 12A via a plurality of rope runout detection sensors (not shown) installed in the hoistway 17, and the car side main rope is based on the detection result. The operation of the runout suppressing device 30 is controlled so as to suppress the lateral runout of the group 12A. As a result, the lateral runout of the main rope group 12A on the car side can be suppressed at an early stage. Further, for the drive control of the runout suppression device 30 in the control unit 20, a drive pattern suitable for attenuating the lateral runout of the car side main rope group 12A may be calculated in advance and used by using simulation or the like. In addition, an appropriate drive pattern for suppressing the lateral vibration of the car side main rope group 12A is experimentally calculated by operating the runout suppression device 30 in a state where the car side main rope group 12A is actually laterally oscillated. You may try to do it.

FIG. 2 is a perspective view of the runout suppression device 30 shown in FIG. FIG. 2 shows the configuration of the runout suppression device 30 shown in FIG. 1 when viewed from diagonally rearward. FIG. 3A is a diagram showing the configuration of the runout suppression device 30 when viewed from the direction A shown in FIG. As shown in FIGS. 2 and 3A, the runout suppressing device 30 includes a support portion 32 fixed to the car side main rope group 12A directly above the car 14 and a car side main rope group above the support portion 32. It is provided with a runout suppressing unit 40 fixed to 12A.

The support portion 32 is formed in a substantially cross shape in a top view, and is composed of a runout suppression piece 34 extending in the X direction and a runout suppression piece 36 extending in the Y direction. Cylinders H1, H2, and H3 penetrating in the thickness direction are provided at the center of the support portion 32. The main ropes 12-1, 12-2, and 12-3 constituting the car-side main rope group 12A are inserted into the cylinders H1 to H3. The main ropes 12-1, 12-2, and 12-3 are fixed to the support portion 32 in the cylinders H1 to H3 by using a fixture such as a bolt (not shown).

Further, as shown in FIG. 2, the runout suppression unit 40 includes a runout suppression unit 42 that suppresses lateral runout of the car-side main rope group 12A in the X direction, and a car in the Y direction that is arranged directly above the unit 42. It is composed of a runout suppression unit 48 that suppresses lateral runout of the side main rope group 12A. Since the runout suppression units 42 and 48 have the same configuration, the runout suppression unit 42 will be mainly described in the following description, and the runout suppression unit 48 will be omitted as appropriate.

As shown in FIG. 3A, the runout suppression unit 42 includes a main body 43 having a substantially box-like appearance fixed to the car-side main rope group 12A. The main body 43 is provided with pulleys 44 and 45 on both side surfaces, and is provided with a drive unit 46 at one end. Since the configurations and peripheral configurations of both pulleys 44 and 45 are the same, the configuration and peripheral configurations of the pulley 45 will be mainly described in the following description, and the description of the pulley 44 and peripheral configurations will be omitted as appropriate. The pulley 45 is composed of a wheel-set type pulley, that is, a large-diameter pulley portion 45A formed on the outside and a small-diameter pulley portion 45B formed on the inside. Further, as shown in FIG. 3A, the drive unit 46 is provided with drive shafts 46A and 46B protruding from both side surfaces, respectively, and the drive pulleys 47A and 47B are provided via the drive shafts 46A and 46B. Are driven to rotate. Since the configurations and peripheral configurations of the drive pulleys 47A and 47B are the same, the peripheral configurations of the drive pulleys 47B and the drive pulleys 47B will be mainly described below, and the peripheral configurations of the drive pulleys 47A and the drive pulleys 47A will be described. Will be omitted as appropriate.

A drive rope D1 is bridged between the inner pulley portion 45B and the drive pulley 47B of the pulley 45 described above, and the pulley 45 is rotationally driven via the drive rope D1. Further, as shown in FIG. 3A, a runout suppression rope having both ends connected to both ends 34A and 34B of the runout suppression piece 34 constituting the support portion 32 to the large diameter pulley portion 45A of the pulley 45. R2 is bridged. As a result, as the drive pulley 47B rotates, the runout suppression piece 34 constituting the support portion 32 can be pulled via the runout suppression rope R2.

FIG. 3B is a partial cross-sectional view showing the configuration around the pulley 45 of the main body 43. As shown in FIG. 3B, a guide protrusion 43A is provided inside the main body 43 along the vertical direction Z, and moves up and down between the guide protrusion 43A and the side wall 43B. A substantially rectangular parallelepiped slide member 49 arranged so as to be possible is provided. Further, the side wall portion 43B is provided with a vertically long slit 43B-1 at a position facing the slide member 49. A shaft 45-1 of the pulley 45 is rotatably supported on the slide member 49 while being inserted through the slit 43B-1. Further, an elastic spring SP1 is arranged between the slide member 49 and the bottom portion 43C of the main body 43. With these configurations, the pulley 45 is supported by the main body 43 in the vertical direction, in other words, in a state where the pulley 45 can be moved in a direction substantially parallel to the vertical direction Z when the car side main rope group 12A is not swinging sideways. ..

With the above configuration, when the distance between the main body 43 and the support portion 32 fluctuates due to the lateral runout of the main rope group 12A on the car side or the drive of the runout suppression units 42 and 48, the pulley 45 moves up and down to change the distance. Can be absorbed. As a result, it is possible to prevent the runout suppressing rope R2 from bending or an excessive tension acting on the rope R2 from falling off from the pulley 45. In the present embodiment, the pulley 45 is supported by the main body 43 in a state where it can be moved in the vertical direction Z, but when the change in the distance between the main body 43 and the pulley 45 is minute and can be ignored, the pulley 45 is vertically mounted. It is not necessary to support the main body 43 in a state where it can be moved in the direction.

Subsequently, the operation of the runout suppressing device 30 when the car side main rope group 12A swings laterally will be described with reference to FIG. FIG. 4 is a diagram schematically showing a state when the car side main rope group 12A swings sideways.

In FIG. 4, at the position where the maximum amplitude is obtained in the vertical direction Z, the car-side main rope group 12A swings laterally from the origin position P in the Y1 direction to reach the position P1, and at the position P1, the car-side main rope group 12A swings in the swing direction. Is changed in the Y2 direction, passes through the origin position P, reaches the position P2 on the opposite side, and is laterally shaken so that the runout direction changes in the Y1 direction at the position P2. Here, the origin position means the position of the car-side main rope group 12A in a state in which the car-side main rope group 12A does not swing sideways, that is, in a stationary state.

As shown in FIG. 4, when the control unit 20 detects that lateral vibration has occurred in the car-side main rope group 12A by the vibration detection sensor (not shown), the ends of the vibration suppression pieces 34 and 36 on the lateral vibration direction side are detected. The drive of the runout suppression units 42 and 48 is controlled so that the portions 34A, 34B, 36A and 36B are pulled via the runout suppression ropes R1, R2, R3 and R4, respectively.

More specifically, as shown in FIG. 4, when the car-side main rope group 12A swings laterally in the Y direction between the origin position P and the position P1, the runout suppressing ropes R3 and R4 are used. The runout suppression unit 48 pulls the end 36A of the runout suppression piece 36 through the runout suppression piece 36. At this time, the runout suppression unit 48 is driven so that the magnitude of the force with which the runout suppression unit 48 pulls the end 36A of the runout suppression piece 36 is the largest when the car side main rope group 12A is located at the position P1. It is preferable to control. As a result, the lateral runout of the car side main rope group 12A can be attenuated at an early stage.

By the way, the support portion 32 is attached to the car side main rope group 12A at a position closer to the car 14 than the runout suppression units 42 and 48. On the other hand, one end of the car side main rope group 12A is attached to the car 14. Therefore, when a force of the same magnitude acts in the horizontal direction, the runout suppression units 42 and 48 fixed to the car side main rope group 12A at a position relatively distant from the car 14 are supported. It is easier to displace in the horizontal direction than 32. Therefore, when the runout suppression unit 48 pulls the end portion 36A of the support portion 32 via the runout suppression ropes R3 and R4, the runout suppression unit 48 is displaced relatively larger in the horizontal direction. Then, by urging the car side main rope group 12A of the fixed portion of the runout suppression unit 48 in the Y1 direction, the lateral runout of the car side main rope group 12A can be attenuated at an early stage.

When the runout suppression unit 48 pulls the support portion 32 diagonally upward via the runout suppression ropes R3 and R4, a force that pulls the car side main rope group 12A upward through the support portion 32 also acts. However, the magnitude of the force with which the car-side main rope group 12A suspends the car 14 is considerably larger than the force with which the runout suppressing units 42 and 48 pull the support portion 32. Therefore, the runout suppressing units 42 and 48 do not loosen the car side main rope group 12A by pulling the support portion 32.

Further, as shown in FIG. 4, when the runout suppression unit 48 pulls the end portion 36A of the support portion 32, the distance between the runout suppression unit 42 and the runout suppression piece 34 fluctuates, and this fluctuation occurs in the pulleys 44 and 45. Is absorbed by the vertical movement of. In this way, it is possible to prevent the runout suppressing ropes R1 and R2 from falling off from the pulleys 44 and 45.

On the other hand, when the car-side main rope group 12A swings laterally in the Y direction between the origin position P and the position P2 shown in FIG. 4, the end 36B of the swing suppression piece 36 in the support portion 32 is restrained from swinging. The runout suppression unit 48 is pulled through the ropes R3 and R4. Thereby, the lateral runout of the car side main rope group 12A can be suppressed in the same manner as described above. In this way, the control unit 20 controls the drive of the runout suppression unit 48 so that the runout suppression unit 48 alternately pulls the ends 36A and 36B of the runout suppression piece 36 close to the lateral runout position of the car side main rope group 12A. As a result, the lateral runout of the car side main rope group 12A can be attenuated at an early stage.

Further, when the car-side main rope group 12A is laterally swaying in the X direction, the end 34A of the run-out suppressing piece 34, as in the case where the car-side main rope group 12 is laterally swaying in the Y direction described above, The control unit 20 may control the drive of the runout suppression unit 42 so as to pull the 34B. As a result, the lateral vibration of the car-side main rope group 12A in the X direction can be attenuated at an early stage.

On the other hand, when the car side main rope group 12A swings laterally in a direction other than the X direction and the Y direction, the lateral runout displacement of the car side main rope group 12A is X due to the drive control of the runout suppression units 42 and 48 described above. The directional component and the Y-direction component may be attenuated by the runout suppression units 42 and 48, respectively. That is, the drive of both the suppression units 42 and 48 may be controlled so that the runout suppression unit 42 attenuates the X-direction component and the runout suppression unit 48 attenuates the Y-direction component. As a result, the lateral vibration of the car-side main rope group 12A in directions other than the X direction and the Y direction can be attenuated at an early stage.

According to the runout suppression device 30 of the main rope, the runout suppression units 42 and 48 attached to the car side main rope group 12A pull the runout suppression ropes R1 to R4 connected to the support portion 32 to pull the car side main rope. The lateral runout of group 12A is suppressed. In this configuration, even if the runout suppression units 42 and 48 operate due to the lateral runout of the car side main rope group 12A, the units 42 and 48 are attached to the car side main rope group 12A, so that the units 42 and 48 It is difficult for the operating noise of the car to be transmitted to the inside of the car 14. As a result, it is possible to reduce the amount of noise transmitted into the car 14 when the runout suppression units 42 and 48 are operated due to the lateral runout of the car side main rope group 12A.

In the above embodiment, the runout suppression units 42 and 48 are used to attenuate the lateral runout of the car side main rope group 12A in the X direction and the Y direction, but only one of the runout suppression units is provided and the X direction or the runout suppression unit is provided. The lateral vibration in the Y direction may be attenuated.

The present invention can also be carried out in a mode in which various improvements, modifications, or modifications are made based on the knowledge of those skilled in the art without departing from the spirit of the present invention. Further, within the range in which the same action or effect is produced, any of the invention-specific matters may be replaced with another technique.

10 Elevator 12 Main rope group 12-1, 12-2, 12-3 Main rope 12A Car side main rope group 12B Balanced weight side main rope group 14 Riding car 30 Runout suppression device (main rope runout suppression device)
32 Support part 34,36 Runout suppression piece 34A, 34B, 36A, 36B End part 40 Runout suppression part 42,48 Runout suppression unit 43 Main body 44,45 Pulley 45A, 45B Pulley part 46 Drive part 46A, 46B Drive shaft 47A, 47B Drive pulley D1 Drive rope R1, R2, R3, R4 Runout suppression rope P Origin position P1, P2 Position X, Y Horizontal direction Z Vertical direction

Claims (3)

A runout suppression device that suppresses the runout of the main rope when the main rope that suspends the elevator car is shaken.
A support portion attached to the main rope above the car and
The main rope is attached to the main rope above the support portion, and the runout suppressing portion that suppresses the runout of the main rope by pulling the runout suppressing rope connected to the support portion is provided.
Main rope runout suppression device The runout suppression unit includes a pulley over which the runout suppression rope is laid, and a drive unit that rotationally drives the pulley.
The runout suppression device for the main rope according to claim 1. The runout suppression unit is configured to suppress runout of the main rope in two orthogonal directions.
The runout suppressing device for the main rope according to claim 1 or 2.

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