JP5674215B1 - Elevator rope runout suppression device - Google Patents

Abstract

[PROBLEMS] To reduce the amount of rope swing itself when an elevator rope swing is likely to increase during an earthquake or strong wind. A rope runout suppressing apparatus according to an embodiment of the present invention includes a hitch plate 22 and a hitch plate 22 each having a plurality of shackle rods 25 to which end portions of a plurality of wire ropes 14 are respectively attached. A hitch plate rotating mechanism that rotates the angle to change the natural frequency of the wire rope 14 by twisting it. [Selection] Figure 2

Description

  Embodiments of the present invention relate to an elevator rope run-out suppressing device that suppresses the run-out amount of a rope when a wire rope (hereinafter referred to as a rope) that suspends an elevator car is shaken by an earthquake or strong wind.

  Of the vibrations included in seismic waves, long-period ground motions have the concern of causing high-rise buildings to resonate when they coincide with the natural frequency of high-rise buildings, and earthquake countermeasures have become an important issue even in elevators. For this reason, in an elevator installed in a high-rise building, measures are taken such as a control operation that temporarily stops the elevator when the building is shaken by an earthquake or a strong wind.

  Also, in elevators of high-rise buildings, the width of the building swings during an earthquake or strong wind, and the rope that hangs the elevator car swings along with it, and the vibration of the earthquake and the natural vibration of the rope match. The rope may resonate.

  Guide rails are installed on the walls of the hoistway, and hoistway devices such as landing switches for detecting landing of the car are installed. If the elevator rope swings greatly, it may catch on the guide rail support brackets or the arm to which the landing switch is attached, causing an accident that damages the hoistway equipment. In the worst case, it also develops into a situation where passengers are trapped in the car.

  As a measure for preventing such a catching phenomenon due to rope swing, a protection line is provided between the end of the arm to which the hoistway device is attached and the construction side structure of the hoistway.

  On the other hand, in order to ensure the safety of passengers before the phenomenon of the rope being caught, in Patent Document 1, for example, the amount of rope runout is calculated from the rope image, and when the rope runout exceeds a certain level, It proposes to perform deceleration operation and control operation that stops the car at the nearest floor.

JP 2009-166939 A

  Conventional measures against rope runout due to earthquakes and strong winds are effective in preventing damage to hoistway equipment due to rope catching, or preventing passenger confinement in the car.

  However, the swing of the rope itself cannot be suppressed. For this reason, when a rope shake occurs during an earthquake or a strong wind, if the rope shake is large, the vibration is transmitted to the car, causing the passenger to feel uncomfortable or in some cases anxious. It will be.

  Therefore, the present invention has been made in view of the above-described problems of the prior art, and when the swing of the elevator rope is likely to increase during an earthquake or a strong wind, the swing amount of the rope itself can be suppressed to a low level. An object of the present invention is to provide an elevator rope run-out suppressing device.

  In order to achieve the above object, the present invention changes the natural frequency of the wire rope so that the plurality of wire ropes for suspending the elevator car and the counterweight do not resonate with the vibration of the building. By the above, a device for suppressing the swing of the rope, the hitch plate to which a plurality of shackle rods that respectively fix the end portions of the plurality of wire ropes are attached, and the hitch plate are rotated by a predetermined angle, And a hitch plate rotation mechanism that changes the natural frequency of the wire rope by twisting the wire rope.

1 is a diagram illustrating a schematic configuration of an elevator to which an elevator rope run-out suppressing device according to the present invention is applied. 1 is a side view of an elevator rope run-out suppressing device according to a first embodiment of the present invention. 1 is a plan view of an elevator rope run-out suppressing device according to a first embodiment of the present invention. It is a side view which shows the modification of the rope run-out suppression apparatus of the elevator by 1st Embodiment. It is a top view which shows the modification of the rope run-out suppression apparatus of the elevator by 1st Embodiment. It is a side view of the rope run-out suppressing device of the elevator by 2nd Embodiment of this invention. It is a top view of the rope run-out suppressing device of the elevator by 2nd Embodiment of this invention. It is a figure which shows schematic structure of the elevator with which 3rd Embodiment of this invention is applied. It is a flowchart which shows the procedure which operates the rope runout suppression apparatus by 3rd Embodiment of this invention. It is a figure which shows schematic structure of the elevator with which 4th Embodiment of this invention is applied. It is a side view of the rope run-out suppressing device of the elevator by 4th Embodiment of this invention.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of an elevator rope run-out suppressing device according to the present invention will be described with reference to the accompanying drawings.

First embodiment
FIG. 1 is a diagram illustrating a schematic configuration of an elevator to which the rope runout suppressing apparatus according to the present embodiment is applied. In FIG. 1, reference numeral 10 indicates an elevator car, and reference numeral 12 indicates a counterweight.

  A main rope composed of a plurality of ropes 14 is wound around a traction sheave 15 and a deflecting sheave 16 of the hoisting machine. One end of the rope 14 is fixed to the car 10, the other end of the rope 14 is fixed to the counterweight 12, and the car 10 and the counterweight 12 are suspended by the rope 14 in a fishing bottle shape.

  In this embodiment, the end of the rope 14 is connected to prevent the rope 14 from swinging as shown by a broken line in FIG. 1 when an earthquake occurs or the building shakes due to a strong wind. A rope runout suppression device 20 that rotates the hitch plate is installed on the upper beam of the car 10.

FIG. 2 is a view showing a side surface of the rope shake suppressing device 20 according to the present embodiment, and FIG. 3 is a view of the rope shake suppressing device 20 as viewed from above the upper beam 18.
2 and 3, reference numeral 22 denotes a hitch plate. The hitch plate 22 is formed of a disk-shaped plate and is rotatably held by an annular housing 23. The housing 23 is formed with a ring-shaped guide rail that guides the rotation of the hitch plate 22.

  Four shackle rods 25 for connecting the end of the rope 14 are attached to the hitch plate 22. The lower end portion of the shackle rod 25 is inserted through the hitch plate 22. A spring seat 26 is provided at the lower end of the shackle rod 25, and a coil spring 27 that absorbs vibration is mounted between the lower surface of the hitch plate 22 and the spring seat 26. Reference numeral 28 is a lock nut for fixing the spring seat 26.

  A socket 30 that holds the end of the rope 14 is attached to the tip of the shackle rod 25 that rises vertically from the hitch plate 22. Inside the socket 30 is housed a wedge member in which the end of the rope 14 is folded back. The end of the folded rope is clipped using a clip.

  In this embodiment, a motor 32 is installed on the housing 23 as a drive source for rotating the hitch plate 22. On the outer periphery of the hitch plate 22, a driven ring gear 33 is provided. The ring gear 33 meshes with a driving-side spur gear 34 that is rotated by a motor 32.

  The elevator rope run-out suppressing device according to the present embodiment is configured as described above. Next, its operation and effects will be described.

  While the elevator is operating normally, in the rope runout suppressing device 20 of the present embodiment, the hitch plate 22 remains stationary. When there is no swing of the rope 14 due to an earthquake or strong wind, the rope swing suppression device 20 functions only as a hitch plate for fixing the shackle rod 25.

  On the other hand, when the seismic vibration is detected by a seismometer or the like while the car 10 is traveling, the rope shake suppression device 20 operates as follows.

  In FIG. 2, the motor 32 is activated to rotate the spur gear 34, and the rotational torque is transmitted to the hitch plate 22 through the ring gear 33 that meshes with the spur gear 34. In this case, the hitch plate 22 is decelerated and starts to rotate slowly. For example, the hitch plate 22 stops when it rotates about 90 degrees.

  As the hitch plate 22 rotates, a total of four ropes 14 whose ends are connected to the shackle rods 25 are wound in a bundle. By winding these four ropes 14 in a bundle shape, the natural frequency of the rope 14 changes to a value different from the original natural frequency.

  When the vibration frequency of the building at this time coincided with the original natural frequency of the rope 14, there was a possibility that the rope 14 would resonate and shake greatly. By operating the rope swing suppression device 20, the rope 14 is wound in a bundle shape and the natural frequency deviates from a value that resonates, so that the swing amount of the rope 14 itself can be reduced to a small range.

  When the shaking of the building is settled, the hitch plate 22 rotates in the reverse direction to return the swaying of the bundled rope 14, so that the rope 14 returns to the original state.

Modified example
The above is an example in which the rotation of the motor 32 is transmitted to the hitch plate 22 by the spur gear 34 and the ring gear 33. However, as shown in FIGS. 4 and 5, the worm gear 36 is replaced by the ring gear instead of the spur gear 34. The worm gear 36 may be driven by a motor 32.

  By using the worm gear 36 instead of the spur gear 34, the structure around the hitch plate 22 in the rope runout suppressing device 20 can be compactly compared with the structure using the spur gear.

Second embodiment
Next, FIGS. 6 and 7 show a rope runout suppressing apparatus according to a second embodiment of the present invention. The second embodiment is an embodiment in which the hitch plate 22 is directly driven by a motor 32 without using a gear transmission mechanism.

  6 and 7, a housing 44 of a rotation drive mechanism is installed on the upper beam 18. A motor 32 is attached to the bottom surface of the housing 44. The turntable 45 is rotatably supported via a bearing 46 and is directly rotated by the motor 32.

  A pair of legs 47 is vertically mounted on the turntable 45, and the hitch plate 22 is fixed to the upper ends of the legs 47. Four shackle rods 25 each having a socket 30 for holding the end of the rope 14 are attached to the hitch plate 22. The configuration of the shackle rod 25 is the same as that shown in FIG.

  When the motor 32 is started when the building is shaken by an earthquake or a strong wind, the hitch plate 22 starts rotating together with the turntable 45, for example, rotates about 90 degrees and stops. Since the rope 14 is wound in a bundle by the rotation of the hitch plate 22, the natural frequency deviates from the resonating value, and the swing amount of the rope 14 itself can be reduced to a small range.

  When the shaking of the building is settled, the hitch plate 22 rotates in the reverse direction to return the swaying of the bundled rope 14, so that the rope 14 returns to the original state.

  In the second embodiment, the hitch plate 22 is directly driven by the motor 32 and rotated without using the gear transmission mechanism, so that the rope 14 can be quickly bundled in a bundle after sensing the shaking of the building. In other words, it is possible to quickly take measures to suppress the rope 14 from shaking.

Third embodiment
Next, with reference to FIG. 8, FIG. 9, the rope runout suppressing apparatus by 3rd Embodiment of this invention is demonstrated.

  In this third embodiment, the vibration detector 40 is installed in the elevator's machine room, and when the vibration detector 40 detects the vibration of the building, the vibration amount of the rope 14 is predicted, and the predicted value is When it exceeds a certain level, the rope runout suppression device 20 is activated.

  The configuration of the rope runout suppressing device 20 can be any of those shown in FIGS. 2, 4, and 6.

  Here, FIG. 9 is a flowchart showing a control procedure of the rope runout suppression apparatus 20 executed by the arithmetic unit of the control panel 42 installed in the machine room of the elevator.

  First, when the vibration detector 40 detects the vibration of the building, the vibration signal is transmitted to the control panel 42 (step S10). In the control panel 42, data indicating how the rope 14 swings in response to various magnitudes of vibration is stored in a storage device, and the arithmetic unit determines the amplitude and period of the detected vibration waveform. The amount of deflection of the rope 14 is estimated by collating with the data (step S11).

  Next, the estimated amount of shake of the estimated rope 14 is compared with a preset reference value of the amount of shake (step S12). This reference value is a shake amount that is a criterion for determining whether or not the rope shake suppression device 20 needs to be operated. As a result of the comparison, when the estimated shake amount is larger than the reference value, the process proceeds to step S13, and the control panel 42 operates the rope shake suppression device 20.

  In the rope runout suppressing device, when the motor 32 is activated, the hitch plate 22 starts rotating and rotates to a predetermined rotational position. Since the rope 14 is wound in a bundle by the rotation of the hitch plate 22, the natural frequency of the rope 14 deviates from the resonating value, and the swing amount of the rope 14 itself can be reduced to a small range. When the shaking of the building ends, the hitch plate 22 is reversely rotated to the original position (step S14), thereby returning the twist of the bundled rope 14, and the rope 14 returns to the original state.

  On the other hand, as a result of the comparison in step S12, when the estimated shake amount is smaller than the reference value, the rope shake suppressing device 20 ends the process without operating.

  According to the third embodiment as described above, in a situation where the building shakes due to an earthquake or strong wind, and there is a high probability that the swing amount of the rope 14 will increase due to resonance, the hitch plate 22 rotates and the rope moves. It is wound in a bundle and the amount of rope runout can be reliably reduced. On the other hand, the pitch plate 22 can be prevented from rotating under conditions where the swing amount of the rope 14 is unlikely to increase even when the building is shaken, and unnecessary operations can be eliminated.

Fourth embodiment
Next, a rope runout suppressing apparatus according to a fourth embodiment of the present invention will be described with reference to FIGS.
FIG. 10 is a diagram illustrating a schematic configuration of an elevator to which the rope run-out suppressing device according to the fourth embodiment is applied. The fourth embodiment is an embodiment in which roping of the rope 14 is applied to an elevator having a so-called 2: 1 configuration.

  As shown in FIG. 10, a hitch beam 50 is installed in the elevator machine room. The rope runout suppression device 20 is installed in the hitch beam 50, and one end of the rope 14 is fixed to the hitch plate of the rope runout suppression device 20.

  A sheave 51 is installed on the car 10, and a sheave 52 is also installed on the counterweight 12. The rope 14 is wound around the sheep 51, the traction sheave 15 of the hoisting machine, the deflecting sheave 16, and the sheave 52 of the counterweight 12. The end of the rope 14 wound around the sheave 52 is fixed to the hitch beam 14.

  FIG. 11 shows the rope runout suppressing device 20 installed in the hitch beam 50. The rope shake suppression device 20 of the fourth embodiment has a configuration in which the configuration of the rope shake suppression device 20 shown in FIG. 2 is turned upside down. Note that the rope runout suppressing device 20 of the embodiment shown in FIGS. 4 and 6 is also applicable.

  A housing 23 that rotatably holds the hitch plate 22 is attached to the hitch beam 50. As a drive source for rotating the hitch plate 22, a motor 32 is installed under the housing 23. On the outer periphery of the hitch plate 22, a ring gear 33 on the driven side is provided concentrically. The ring gear 33 meshes with a driving-side spur gear 34 that is rotated by a motor 32.

  Four shackle rods 25 having sockets 30 for holding the ends of the ropes 14 are attached to the hitch plate 22, but the shackle rods 25 are upside down from the rope runout suppression device 20 shown in FIG. 2. Is fixed.

  According to the fourth embodiment as described above, the end of the rope wound around the sheave 51 of the car 10 is connected to the hitch plate 22 of the rope runout suppressing device 20 provided in the hitch beam 50, thereby 2 Even in an elevator having a configuration of 1: roping, it is possible to effectively take a countermeasure against the swing of the rope 14 by winding the rope 14 in a bundle after sensing the shaking of the building.

  As mentioned above, although the preferred embodiment was mentioned and demonstrated about the rope run-out suppression apparatus of the elevator by this invention, these embodiment was given as an illustration and does not intend the restriction | limiting of the range of invention. Of course, the novel apparatus, method and system described in the specification can be implemented in various forms, and various omissions, substitutions and changes can be made without departing from the spirit of the present invention. is there. The claims and their equivalents are intended to cover the embodiments or improvements thereof within the spirit of the invention.

DESCRIPTION OF SYMBOLS 10 ... Ride car, 12 ... Counterweight, 14 ... Rope, 18 ... Upper beam, 20 ... Rope run-out control device, 22 ... Hitch plate, 25 ... Shackle rod, 27 ... Coil spring, 30 ... Socket, 32 ... Motor, 33 ... Ring gear, 34 ... Spur gear, 36 ... Worm gear, 40 ... Vibration sensor, 42 ... Control panel, 45 ... Turntable, 47 ... Leg, 50 ... Hitch beam

Claims (8)

A device that suppresses the swing of the rope by changing the natural frequency of the wire rope so that a plurality of wire ropes for suspending the elevator car and the counterweight do not resonate with the vibration of the building. ,
A hitch plate with a plurality of shackle rods attached to the ends of the plurality of wire ropes,
A hitch plate rotating mechanism for rotating the hitch plate by a predetermined angle and imparting a twist to the wire rope to change its natural frequency;
An elevator rope run-out suppressing device characterized by comprising: The elevator hitch suppression apparatus according to claim 1, wherein the hitch plate rotation mechanism includes a motor and a gear transmission mechanism that transmits rotation of the motor to the hitch plate.   The elevator gear according to claim 2, wherein the gear transmission mechanism includes a spur gear that is rotationally driven by the motor, and a ring gear that meshes with the spur gear and is provided on an outer periphery of the hitch plate. Rope runout suppression device.   The elevator gear according to claim 2, wherein the gear transmission mechanism includes a worm gear that is rotationally driven by the motor, and a ring gear that meshes with the worm gear and is provided on an outer periphery of the hitch plate. Rope runout suppression device.   The elevator hitch suppression apparatus according to claim 1, wherein the hitch plate rotating mechanism includes a motor and a rotary table that is directly driven by the motor and supports the hitch plate.   When the vibration of the building is sensed, the amount of swing of the rope is predicted, and when the predicted amount of swing is larger than a preset reference value, control means for operating the rope swing suppression device is provided. The elevator rope run-out suppressing device according to any one of claims 1 to 5.   The rope runout suppressing device is installed on the car in a roping configuration in which one end of the rope is fastened to the counterweight and the other end of the rope is fastened to the car. The elevator rope run-out suppressing device according to any one of claims 1 to 6, wherein the elevator rope run-out suppressing device is provided.   The elevator rope runout suppression device according to any one of claims 1 to 6, wherein the rope runout suppression device is installed in a hitch beam at an uppermost part of an elevator hoistway having a 2: 1 roping configuration. .

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