JP2016088726A - Main rope unbalance compensator of elevator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a main rope unbalance compensator of an elevator capable of suppressing an ascent of a tension wheel without biting into a rail when the tension wheel jumps up following a sudden stop of the elevator while detecting an ascent of the tension wheel and stops an operation of a hoist before a jumping-up prevention part suppresses an ascent of the tension wheel.SOLUTION: A main rope unbalance compensator 30 includes a compensation rope 36b, one end of which is connected to the bottom edge of a car 14, and the other end of which is connected to a lower side of a counter weight 16, a tension wheel 36 for importing tension to the compensation rope 36b, a jumping-up prevention part 40 provided above the tension wheel 36 that includes an elastic stopper 44 on the lower surface side, a safety switch 50 provided at a predetermined position on the lower end side of the elastic stopper 44 that detects the tension wheel 36, and a control part 20 for controlling an operation of the hoist 12. The control part 20 stops an operation of the hoist 12 when the safety switch 50 detects the tension wheel 36.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an elevator main rope unbalance compensator.

  The main rope imbalance compensator provided in the elevator includes a compensation rope having one end connected to the car and the other end connected to the counterweight, and a tensioning wheel that applies tension to the compensation rope. For example, the stretcher is supported by a rail erected in a pit of a hoistway so as to be movable in the vertical direction. When the elevator stops suddenly, for example, the counterweight is prevented from jumping up due to inertial force by the tensioning wheel rising. The main rope imbalance compensator includes a lockdown device (hereinafter, referred to as a spring-up prevention unit) that suppresses the lift of the tensioner when the tensioner is excessively lifted.

  Patent Document 1 discloses a main rope imbalance compensator including a spring-up preventing unit that suppresses the lifting of a tensioned vehicle when the tensioned vehicle rises. This main rope unbalance compensator uses a frictional force generated between the biting roller and the rail, and the biting roller of the spring-up preventing portion bites between the holding bracket fixed to the support frame of the tensioner and the rail. It is comprised so that the rise of a car may be suppressed.

  Also, in general, the jumping prevention part of the main rope imbalance compensator detects the ascent of the stretcher before the biting roller bites between the gripping bracket and the rail, and stops the operation of the hoisting machine, for example. It is also necessary to provide a safety switch to be used. In this safety switch, for example, when the main rope contracts due to seasonal factors and the tension wheel rises, the above-mentioned biting roller bites between the gripping bracket and the rail, so that the jump-up prevention part can be appropriately used when the elevator stops suddenly. It has a role to prevent it from functioning.

JP 2013-166606 A

  In the main rope imbalance compensator described in Patent Document 1, when the spring-up prevention unit suppresses the lifting of the tensioner, the biting roller bites between the holding metal fitting and the rail. For this reason, there is a problem that it takes much time to restore the apparatus.

  Therefore, an object of the present invention is to detect the rise of the tension vehicle and stop the operation of the hoisting machine before the splash prevention unit suppresses the rise of the tension vehicle, and the tension vehicle jumps up when the car suddenly stops. It is an object of the present invention to provide an elevator main rope unbalance compensator that can suppress the lifting of a tensioned vehicle without biting into a rail.

  The main rope unbalance compensator for an elevator according to the present invention includes a main rope connected to a car and a counter weight via a hoisting machine, and the mass of the main rope on the car side that changes according to the raising and lowering of the car. Compensation device for compensating for the mass imbalance of the main rope on the counterweight side, one end connected to the lower end of the car and the other end connected to the lower side of the counterweight, and a compensation rope A tensioning wheel that applies tension to the compensating rope that hangs down in the direction of gravity while guiding the wind, a spring-up preventing portion that is provided above the tensioning wheel and has an elastic stopper on the lower surface facing the tensioning wheel, and a lower end side of the elastic stopper A safety switch that is provided at a predetermined position and detects a tensioned vehicle and a control unit that controls the operation of the hoisting machine, and the control unit winds up when the safety switch detects the tensioned vehicle The operation is intended to stop.

  In the main rope unbalance compensator for an elevator according to the present invention, the predetermined position may be set within 100 mm on the lower end side of the elastic stopper.

  The elevator main rope imbalance compensator according to the present invention is provided within a predetermined range on the lower end side of the tensioned vehicle, and includes a lowering detection switch for detecting the lowering of the tensioned vehicle and a detection by the lowering detection switch. And a notifying unit for notifying, and the control unit may notify the notifying unit when the lowering detection switch detects the descent of the tensioned vehicle.

  The elevator main rope imbalance compensator according to the present invention further includes a rail that supports the tensioned vehicle so as to be movable in the vertical direction, and is formed with a plurality of position adjustment holes along the vertical direction. At least one of the switch and the lowering detection switch may be detachably attached to the position adjustment hole of the rail.

  Furthermore, in the main rope unbalance compensator for an elevator according to the present invention, the jump-up preventing portion is fitted to the rail so as to be movable in the vertical direction, and is fixed to the rail via a rail clip, and is attached to the upper end portion of the rail. May be provided with a stopper for preventing the splash prevention part from dropping off.

  According to the elevator main rope imbalance compensator according to the present invention, it is possible to suppress the lifting of the tensioned wheel by absorbing the pressing force accompanying the lifting of the tensioned vehicle by the elastic force of the elastic stopper. Thereby, since an elastic stopper does not bite into a rail etc., restoration work of an apparatus can be performed easily.

  Further, according to the elevator main rope unbalance compensator according to the present invention, for example, the operation of the hoisting machine can be stopped before the elastic force of the elastic stopper acts on the tensioner that has been lifted by contraction of the main rope or the like. it can. For this reason, when the elevator car suddenly stops and the tensioned vehicle rises, the elastic force of the elastic stopper can be reliably applied to the tensioned vehicle to suppress the lifting of the tensioned vehicle.

It is a figure which shows the whole elevator structure containing the main rope imbalance compensation apparatus which is embodiment which concerns on this invention. It is a perspective view which shows the structure of the main rope imbalance compensation apparatus contained in FIG. It is a perspective view which shows the structure of the support plate of the splash prevention part shown in FIG. It is a figure which shows the structure in the top view of the rail clip shown in FIG.

  Hereinafter, embodiments according to the present invention will be described in detail with reference to the accompanying drawings. In this description, specific shapes, materials, numerical values, directions, and the like are examples for facilitating the understanding of the present invention, and can be appropriately changed according to the application, purpose, specification, and the like. In addition, when a plurality of embodiments and modifications are included in the following, it is assumed from the beginning that these characteristic portions are used in appropriate combinations.

  FIG. 1 is a diagram showing an overall configuration of an elevator 10 including a main rope imbalance compensation device 30 according to an embodiment of the present invention. The elevator 10 includes a main rope 10a, a hoisting machine 12, a running car 12a, a car 14, a counter weight 16, a control unit 20, and a main rope unbalance compensator 30.

  The main rope 10 a is wound around the hoisting machine 12 and the running car 12 a, one end is connected to the car 14, and the other end is connected to the counter weight 16. The hoisting machine 12 is installed in a machine room provided immediately above the hoistway R. The hoisting machine 12 relatively raises and lowers the car 14 and the counter weight 16 via the main rope 10a wound by the rotational driving force of an electric motor (not shown). The counter weight 16 is a counterweight for reducing a load when the hoisting machine 12 lifts the car 14.

  The control unit 20 is a control panel that controls the operation of the hoisting machine 12. The control unit 20 stops the rotational drive of the hoisting machine 12 when a safety switch (to be described later) detects the tension wheel 36, and operates a brake (not shown) to stop the operation of the hoisting machine. Thereby, the raising / lowering of the passenger car 14 is stopped. The control unit 20 has a display unit 20a. The display unit 20a is a notification unit that displays, for example, an operation state of the control unit 20. When the lowering of the tension wheel 36 is detected by a below-described lowering detection switch, the control unit 20 displays the detection result on the display unit 20a. Thereby, it is possible to notify the worker that the tensioning vehicle 36 is descending. Further, instead of or in addition to the display unit 20a, for example, a notification lamp or the like may be provided to display the detection result. In addition, for example, when it is not necessary to notify a worker or the like of the lowering of the tension vehicle 36 according to the specifications of the elevator 10, the display unit 20a may not be provided.

  The main rope imbalance compensator 30 includes a mass of the main rope 10a between the car 14 and the hoisting machine 12 that changes in accordance with the raising and lowering of the car 14, and between the counter weight 16 and the hoisting machine 12. It is a device that compensates for an imbalance with the mass of the main rope 10a. The main rope imbalance compensator 30 has a function of suppressing the counter weight 16 from jumping up due to inertial force when the car 14 suddenly stops, for example.

  Next, a specific configuration of the main rope imbalance compensation device 30 will be described with reference to FIG. FIG. 2 is a perspective view showing a configuration of the main rope imbalance compensator 30 included in FIG. “Arrow” X shown in FIG. 2 indicates a vertical direction, “Arrow” Y indicates a horizontal direction (hereinafter, referred to as a width direction) substantially parallel to an axial direction of a tensioning wheel 36 described later, and an arrow “Z”. "Indicates a direction orthogonal to the up-down direction X and the width direction Y (hereinafter referred to as a depth direction).

  As shown in FIG. 2, the main rope unbalance compensator 30 includes rails 32 and 34, a tensioner 36, a splash prevention unit 40, a safety switch 50, and a lowering detection switch 52. The rails 32 and 34 have a substantially T-shaped cross section in a direction orthogonal to the longitudinal direction, and are erected on the floor surface of the hoistway R so as to face each other. In the following, since the rails 32 and 34 have the same configuration, only the configuration of the rail 34 will be described, and description of the rail 32 will be omitted as appropriate.

  The rail 34 includes a flange 34a that is substantially parallel to the XZ plane and extends in the vertical direction X, and a plate-like protrusion 34b that extends from the center of the flange 34a toward the rail 32. ing. A plurality of position adjustment holes 34c and 34d are formed in the flange 34a along the vertical direction. Each position adjustment hole 34c is a hole for attaching a safety switch 50 and a descent detection switch 52, which will be described in detail later, and is provided at regular intervals, for example. Thereby, the mounting positions of the safety switch 50 and the lowering detection switch 52, which will be described in detail later, can be adjusted. The interval between the position adjustment holes 34c may be set, for example, by appropriately considering the vertical movement range of the tensioning wheel 36 and the like. Moreover, each position adjustment hole 34d is a hole for attaching the safety switch 50 and the descent detection switch 52, and may be provided at equal intervals similarly to each position adjustment hole 34c. In the present embodiment, the safety switch 50 and the lowering detection switch 52 are attached to the position adjustment holes 34c, respectively, but may be provided to the position adjustment holes 34d on the opposite side. Further, the safety switch 50 and the lowering detection switch 52 may be provided in each position adjustment hole formed in the rail 32.

  A stopper 34e is attached to the upper end of the plate-like protrusion 34b of the rail 34. The stopper 34e is composed of a hexagonal bolt with a large diameter, and is fixed by being screwed into a screw hole of a plate-like protrusion 34b (not shown). The stopper 34e has a function of preventing the splash prevention part 40, which will be described in detail later, from dropping off the rails 32 and 34. In the present embodiment, an example in which the stopper 34e is configured by a bolt is described. However, for example, the stopper may be configured by attaching appropriate protrusions to the rails 32 and 34. In addition, when it is not necessary to provide the stopper 34e according to the design specifications of the elevator 10, etc., it is good also as not providing this.

  The tension wheel 36 has a support frame 36a and a compensation rope 36b. The tension wheel 36 is supported so as to be movable in the vertical direction, and applies tension to the compensation rope 36b that hangs down in the direction of gravity while guiding the compensation rope 36b by its own weight. The support frame 36a is a box-shaped member in which substantially square openings are formed at both ends in the depth direction Z, respectively. The support frame 36a has guide grooves 36c and 36d formed on both side surfaces substantially parallel to the XZ plane. These guide grooves 36c and 36d are formed in a substantially U shape in a top view and extend along the vertical direction X, respectively. The rails 32 and 34 described above are fitted into the guide grooves 36c and 36d of the support frame 36a, so that the support frame 36a is supported by the rails 32 and 34 so as to be movable in the vertical direction. The compensation rope 36 b is stretched over the tension wheel 36, and one end is connected to the lower end of the car 14 and the other end is connected to the lower side of the counter weight 16. In the present embodiment, only one compensation rope 36b is provided, but a plurality of compensation ropes 36b may be provided according to the specifications of the elevator.

  FIG. 3 is a perspective view showing the configuration of the support plate 42 of the splash-up preventing part 40 shown in FIG. FIG. 4 is a view showing the configuration of the rail clip 46 shown in FIG. 2 in a top view.

  Hereinafter, the configuration of the splash prevention unit 40 will be described with reference to FIGS. As shown in FIG. 2, the spring-up preventing unit 40 has a function of suppressing the lifting of the tension wheel 36. The splash prevention unit 40 includes a support plate 42, two elastic stoppers 44, and four rail clips 46.

  As shown in FIG. 3, the support plate 42 of the spring-up preventing unit 40 is a plate-like member that is long in the width direction Y. Side walls 42 a erected substantially vertically are formed at both ends in the width direction Y of the support plate 42. Guide portions 42b are respectively formed in the center portions of these side walls 42a in the depth direction Z. These guide portions 42b are cutouts that are substantially U-shaped when viewed from above, and are guide grooves for attaching the support plate 42 to the rails 32 and 34 so as to be movable in the vertical direction. Further, two through holes 42 c for attaching the elastic stopper 44 are formed in the center portion of the support plate 42 along the width direction Y. Further, positioning holes 42d are formed in the side walls 42a of the support plate 42 at both ends in the depth direction Z so as to sandwich the guide portion 42b therebetween. These positioning holes 42d are holes for attaching rail clips 46 to be described in detail later.

  As shown in FIG. 2, the elastic stopper 44 is attached to the lower surface side of the support plate 42 through a through hole 42 c so as to face the tension wheel 36. The elastic stopper 44 has a function of suppressing the lifting of the tension wheel 36 by elastic force. The elastic stopper 44 includes a bolt 44a, a spring 44b, and nuts 44c and 44d.

  The bolt 44a is inserted from below into the through hole 42c of the support plate 42 with the spring 44b inserted through the shaft portion, and from the upper surface side of the support plate 42 with the urging force of the spring 44b acting on the bolt 44a. The nuts 44c and 44d are fastened and fixed by a so-called double nut method. This prevents the nuts 44c and 44d from loosening after being fixed. The nuts 44c and 44d have a function of adjusting the spring pressure by adjusting the length of the spring 44b. As a result, an appropriate elastic force acts when pressed against the support frame 36a of the tension wheel 36.

  The bolt 44 a is a hexagonal bolt having a flat surface facing the support frame 36 a of the tension wheel 36. Thereby, when pressed by the support frame 36a of the tension wheel 36, the elastic force of the elastic stopper 44 can be made to act firmly on the support frame 36a. The surface of the bolt 44a facing the support frame 36a may have a shape having a larger area than a normal hexagon bolt. Further, the opposed surfaces of the bolt 44a may be circular.

  Furthermore, a cushioning material such as rubber may be attached to the opposing surface of the bolt 44a. This makes it difficult for the support frame 36a to be damaged when contacting the elastic stopper 44.

  The four rail clips 46 have a function of fixing the support plate 42 to the rails 32 and 34. Two of the four rail clips 46 are fixed by sandwiching the side wall 42a and the rail 32 on one end side of the support plate 42 shown in FIG. The remaining two rail clips 46 are fixed by sandwiching the side wall 42a and the rail 34 on the other end side of the support plate 42 from both end sides in the depth direction Z, respectively.

  As shown in FIG. 4, the rail clip 46 includes a bracket 46a, a bolt 46b, a pressing plate 46c, and a nut 46d. The bracket 46a is substantially U-shaped when viewed from above, and a positioning projection 46e is formed on the inner side surface on one end side. The positioning protrusion 46e is used to position the mounting position of the bracket 46a on the support plate 42 by fitting into the positioning hole 42d of the support plate 42 when the support plate 42 is fixed to the rails 32 and 34. It is. On the other hand, a screw hole 46f for screwing the bolt 46b is formed in a portion on the other end side facing the positioning projection 46e of the bracket 46a. A holding plate 46c is attached to the tip of the shaft portion of the bolt 46b. The pressing plate 46c is, for example, a circular flat plate. Further, a nut 46d is screwed into the bolt 46b inside the bracket 46a while being inserted into the screw hole 46f of the bracket 46a. The nut 46d is a bolt that is tightened in a direction opposite to the tightening direction of the bolt 46b to prevent the bolt 46b from being loosened when the bolt 46b is tightened and fixed.

  By fixing the support plate 42 to the rails 32 and 34 using the rail clip 46 having the above-described configuration, the vertical position of the spring-up preventing portion 40 can be adjusted according to the position of the tensioning wheel 36. Further, if the pressing force of the tensioning wheel 36 is excessive when the spring-up preventing part 40 is pressed by the tensioning wheel 36, the support plate 42 and the rails 32, 34 are held up while being held up. . Thereby, the deformation | transformation and damage of the rails 32 and 34 and the support plate 42 can be suppressed.

  As shown in FIG. 2, the safety switch 50 is a contact-type sensor having a substantially L shape, and has a function of detecting the rise of the tension wheel 36. The safety switch 50 may use a non-contact sensor.

  The safety switch 50 is provided at a predetermined position on the lower end side of the elastic stopper 44. The predetermined position of the safety switch 50 is preferably set so that the distance α between the elastic switch 44 and the lower end side of the elastic stopper 44 is within 100 mm, for example. Thereby, for example, even if the main rope 10a contracts due to seasonal factors and the lower tensioner 36 rises, the safety switch 50 can be operated in a state in which an appropriate distance remains between the elastic stopper 44. it can. If the distance α needs to be set longer depending on specifications such as the elastic force of the elastic stopper 44 and the weight of the tension wheel 36, the distance α may be set to 100 mm or more.

  In the present embodiment, the distance α is set within 100 mm, but the distance α is more preferably within 20 mm. In this case, for example, when the tensioning wheel 36 is lifted by contraction of the main rope 10a, it is possible to increase the range in which the safety switch 50 does not operate.

  The safety switch 50 includes an arm 50a and a detection piece 50b. The arm 50a is a support member having a substantially rectangular parallelepiped shape extending along the depth direction Z. One end of the arm 50a in the longitudinal direction is fixed to the position adjustment hole 34c via a bolt 50c and a nut 50d. The detection piece 50b is rotatably attached at the other end in the longitudinal direction of the arm 50a so that a direction substantially parallel to the depth direction Z is a rotation axis. The detection piece 50b is disposed at a position where the detection piece 50b contacts the support frame 36a of the tension wheel 36, and detects the rise of the tension wheel 36 by contacting the support frame 36a and rotating upward.

  According to the above configuration, when the tensioning wheel 36 is moved up to the predetermined position, for example, when the tensioning wheel 36 is lifted due to contraction of the main rope 10a due to a seasonal factor, the safety switch 50 detects the rising of the main rope 10a and controls the control unit. The operation of the hoisting machine 12 is stopped by 20. For this reason, the state in which the elastic force of the elastic stopper 44 does not act on the tension wheel 36 is maintained during the operation of the hoisting machine 12. As a result, for example, when the tension vehicle 36 suddenly rises due to a sudden stop of the car 14, the elastic force of the elastic stopper 44 is applied to the tension wheel 36 to reliably suppress the tension vehicle 36 from rising. be able to.

  The lowering detection switch 52 is a contact type sensor that is provided in a predetermined range on the lower end side of the tension wheel 36 and has the same configuration as the safety switch 50. When the lowering detection switch 52 detects the lowering of the tensioning vehicle 36, the control unit 20 causes the display unit 20a to display a display indicating that the tensioning vehicle 36 is descending. The distance within the predetermined range of the lowering detection switch 52 is preferably set so that, for example, the distance β between the lowering detection switch 52 and the support frame 36a of the tensioner 36 is within 100 mm. Thereby, for example, it is detected that the main rope 10a is extended due to a seasonal factor and the tensioner 36 is descending, and the operator is notified via the display unit 20a that the tensioner 36 is descending. it can. As a result, the hole for attaching the safety switch 50 and the descent detection switch 52 can be changed and adjusted to the lower position adjustment hole 34c according to the position of the tensioning vehicle 36 during the maintenance and inspection work.

  Further, the position of the splash preventing part 40 may be adjusted by lowering the position of the rail clip 46. Thereby, since the space | interval of the bounce prevention part 40 and the tension | pulling wheel 36 can be maintained at a suitable distance, the elastic force of the bounce prevention part 40 can be made to act appropriately when the tension | pulling wheel 36 raises.

  As described above, the lowering detection switch 52 has an example in which the distance β between the tension frame 36 and the support frame 36a is set within 100 mm, but the distance β may be set within 20 mm. More preferred. In this case, the lowering of the tension wheel 36 can be detected with higher accuracy.

  In the present embodiment, both the safety switch 50 and the descent detection switch 52 are attached to the position adjustment hole 34c, respectively, but only one of them is attached to the position adjustment hole 34c according to the design specifications and the like. Also good.

  According to the main rope imbalance compensation device 30 according to the above embodiment, the pressing force of the tension wheel 36 can be absorbed by the elastic force of the elastic stopper 44 and the rise of the tension wheel 36 can be suppressed. Thereby, the elastic stopper 44 does not bite into the rails 32 and 34. For this reason, the restoration work of the elevator 10 can be easily performed. In addition, the operation of the hoisting machine 12 can be stopped before the elastic force of the elastic stopper 44 acts on the tension wheel 36 having increased. Therefore, the elastic stopper 44 does not act on the tension wheel 36 during the operation of the hoisting machine 12. As a result, for example, when the tension wheel 36 rises due to a sudden stop of the car 14, the elastic force of the elastic stopper 44 can be reliably applied to the tension wheel 36 to suppress the rise.

  Further, according to the main rope imbalance compensation device 30, when the pressing force accompanying the ascent of the tension wheel 36 is excessive, the rail clip 46 that fixes the jump-up preventing portion 40 to the rails 32, 34 prevents the jump-up. The support plate 42 of the portion 40 is lifted upward while being sandwiched. The spring-up preventing unit 40 is moved upward by the pressing force of the tensioning wheel 36, and finally comes into contact with the stopper 34e at the upper end of the rails 32 and 34 and stops. Along with this, the ascent of the tension wheel 36 can also be stopped. For this reason, the rails 32 and 34 and the spring-up preventing portion 40 are not easily damaged by the pressing force of the tensioning wheel 36, and the dropping of the tensioning wheel 36 from the rails 32 and 34 can be reliably prevented.

  In the main rope imbalance compensation device 30 according to the above embodiment, the lowering detection switch 52 is provided. However, for example, when it is not necessary to provide the lowering detection switch 52 according to the specifications of the elevator 10, the lowering detection switch 52 is not provided. It may be a thing.

  In the main rope imbalance compensation device 30 according to the above embodiment, the detection piece 50b of the safety switch 50 is in contact with the support frame 36a of the tension vehicle 36 to detect the rise of the tension vehicle 36. The detection piece of the safety switch 50 may be in direct contact with the tension wheel 36. In this case, it is preferable to set the distance between the detection piece of the safety switch 50 and the tension vehicle 36 in the same manner as the distance α in the above embodiment. Similarly, for the lowering detection switch 52, the detection piece may be in direct contact with the tension wheel 36. Also in this case, it is preferable to set the distance between the lowering detection switch 52 and the tension wheel 36 in the same manner as the distance β in the above embodiment.

  The main rope imbalance compensator according to the present invention is not limited to the configuration of the above-described embodiment and its modifications, but within the matters described in the claims of the present application and the equivalents thereof. It goes without saying that various improvements and modifications are possible.

10 elevator, 10a main rope, 12 hoisting machine, 14 passenger car, 16 counter weight, 20 control unit, 20a display unit (notification unit), 30 main rope unbalance compensator, 32, 34 rail, 34c, 34d position adjustment Hole, 34e Stopper, 36 Tensioner, 36a Support frame, 36b Compensation rope, 40 Bounce prevention part, 44 Elastic stopper, 46 Rail clip, 50 Safety switch, 52 Lowering detection switch, R hoistway, X vertical direction, Y width direction , Z Depth direction, α, β distance.

Claims (5)

In the main rope connected to the car and the counter weight via the hoisting machine, the mass of the main rope on the car side and the mass of the main rope on the counter weight side that change according to the raising and lowering of the car. A compensation device for compensating for imbalance,
A compensation rope having one end connected to the lower end of the car and the other end connected to the lower side of the counterweight;
A tension wheel that applies tension to the compensation rope that hangs down in the direction of gravity while guiding the compensation rope;
A spring-up preventing portion provided above the tension wheel and having an elastic stopper on a lower surface facing the tension wheel;
A safety switch that is provided at a predetermined position on the lower end side of the elastic stopper and detects the tension wheel;
A control unit for controlling the operation of the hoisting machine,
The control unit stops the operation of the hoisting machine when the safety switch detects the tension vehicle.
Elevator main rope unbalance compensator. In the elevator main rope unbalance compensator according to claim 1,
The elevator main rope unbalance compensator, wherein the predetermined position is set within 100 mm on the lower end side of the elastic stopper. In the elevator main rope imbalance compensator according to claim 1 or 2,
A lowering detection switch that is provided within a predetermined range on the lower end side of the tensioning vehicle and detects the lowering of the tensioning vehicle;
A notification unit for notifying the detection by the lowering detection switch,
The controller is an elevator main rope imbalance compensator that causes the notification unit to notify when the lowering detection switch detects the lowering of the tensioned vehicle. In the elevator main rope imbalance compensator according to any one of claims 1 to 3,
The rail further comprises a rail in which a plurality of position adjustment holes are formed along the vertical direction while supporting the tension wheel so as to be movable in the vertical direction,
At least one of the safety switch and the descent detection switch is a main rope unbalance compensator for an elevator, which is detachably attached to the position adjustment hole of the rail. The elevator main rope unbalance compensator according to claim 4,
The splash prevention part is fitted to the rail so as to be movable in the vertical direction, and is fixed to the rail via a rail clip,
A main rope unbalance compensator for an elevator, wherein a stopper is provided at an upper end portion of the rail to prevent the jump-up preventing portion from falling off.

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