JP6199207B2 - Groove polishing apparatus and elevator apparatus - Google Patents

Description

  The present invention relates to a groove polishing apparatus and an elevator apparatus.

  Conventionally, in an elevator apparatus, a technique for processing or cleaning a groove of a sheave has been disclosed. For example, Patent Document 1 discloses a technique for processing a sheave groove. Specifically, it has a processing portion arranged to face the groove portion around which the rope is not wound, and a movable support portion that supports the processing portion so as to be movable in the rotational axis direction and the radial direction of the sheave, A grooving apparatus configured by providing a grindstone for processing a groove in the processing portion is disclosed. According to this patent document 1, it is said that the correction process of a groove | channel can be performed efficiently in a short time.

  Patent Document 2 discloses a technique for cleaning a groove of a sheave. Specifically, it is equipped so as to be able to move forward and backward with respect to the rim surface of the sheave, and is urged in a direction approaching the rim surface of the sheave by an urging body, and the sheave of the sheave attached to this retainer. A groove cleaning device is disclosed that includes a viscoelastic cleaning spatula that rubs the rope. According to this patent document 2, the groove can be rubbed and cleaned by operating the elevator apparatus at a low speed while the cleaning spatula is pressed against the groove, and can be easily and quickly cleaned.

  Patent Document 3 discloses a technique for cleaning a groove of a sheave as in Patent Document 2. Specifically, a hoisting machine is disclosed that includes a cleaning brush whose tip always contacts the sheave groove from below during normal operation of the elevator apparatus. According to Patent Document 3, work required for cleaning is greatly simplified, and the groove can be always kept clean as well as during maintenance.

JP 2008-87132 A JP 2003-54854 A JP 2012-240836 A

  However, none of the techniques described in Patent Documents 1 to 3 is a technique for polishing a groove of a sheave. Polishing is a process of recreating the shape of a worn groove as described in Patent Document 1, and the original shape of the groove without changing the groove shape itself as described in Patent Documents 2 and 3. It is an intermediate operation with cleaning to maintain the shape, and refers to an operation for forming the surface of the groove.

Specifically, in order to increase the efficiency of the polishing operation, an apparatus for polishing a groove (hereinafter referred to as a groove polishing apparatus) needs to satisfy all of the following conditions. That is, the groove polishing device
(1) A structure that can be always installed during normal operation of the elevator apparatus.
(2) A movable structure that can be separated from the groove during normal operation of the elevator apparatus.
(3) a structure capable of generating a large pressing force capable of polishing the groove;
Is needed.

  The techniques described in Patent Documents 1 and 2 cannot satisfy the above (1), and the technique described in Patent Document 3 cannot satisfy the above (2). Therefore, the efficiency of the polishing operation cannot be improved only by the techniques described in Patent Documents 1 to 3.

  The present invention has been made in consideration of the above points, and proposes a groove polishing apparatus and an elevator apparatus that can improve the efficiency of polishing work.

  In order to solve such a problem, in the present invention, in a groove polishing apparatus for polishing a sheave groove formed in a sheave, the groove polishing apparatus is always installed below the sheave, a stand, a lever, A pressing force adjustment mechanism and a polishing jig are provided, the stand rotatably supports the lever, the lever is installed at a position removed from directly below the sheave groove, one end is rotatably supported by the stand, and the other end Is supported by a pressing force adjusting mechanism, and a support rod is provided between one end and the other end. The supporting rod supports a polishing jig located immediately below the sheave groove. By moving the end upward or downward, the lever is rotated with one end of the lever as a fulcrum, and the polishing jig is supported by the support rod, and when the other end of the lever moves upward, the sheave Polish the sheave groove by touching the groove and the other end of the lever When moving in, characterized in that away from sheave grooves.

  In order to solve such a problem, in the present invention, in an elevator apparatus equipped with a groove polishing device for polishing a sheave groove formed on a sheave, the groove polishing device is always installed below the sheave, Equipped with a stand, lever, pressing force adjusting mechanism, and polishing jig, the stand rotatably supports the lever, the lever is installed at a position off the sheave groove, and one end is rotatable to the stand The other end is supported by the pressing force adjusting mechanism, and a support bar is provided between the one end and the other end. The support bar supports the polishing jig located immediately below the sheave groove, and the pressing force The adjustment mechanism has a structure in which the lever is rotated about the one end of the lever by moving the other end of the lever upward or downward. The polishing jig is supported by the support rod, and the other end of the lever is upward. When moving, the sheave groove touches the sheave groove Polished, if the other end of the lever is moved downwardly, characterized in that away from sheave grooves.

  According to the present invention, it is possible to improve the efficiency of the polishing operation.

It is a top front lineblock diagram of an elevator apparatus. It is an AA cross-section block diagram at the time of a grinding | polishing operation | work start. It is an AA cross-section block diagram at the time of completion | finish of grinding | polishing operation | work. It is an AA cross-section block diagram at the time of normal driving | operation. It is an AA section lineblock diagram at the time of grinding work. It is an expanded block diagram of a BB cross section. It is an expanded block diagram of CC cross section. It is an enlarged lineblock diagram of a DD section. It is an enlarged block diagram of the EE cross section. It is an enlarged block diagram of a pressing force adjustment mechanism. It is an AA cross-section block diagram in other embodiment.

  Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

(1) Whole structure FIG. 1: shows the upper front structure of the elevator apparatus 1 in this Embodiment. The elevator apparatus 1 includes a hoisting machine 10, a sheave 20, a groove polishing apparatus 30, a hoisting machine base 40, a beam 50, a machine room floor 60, a baffle 70, and the like.

  The hoisting machine 10 is a driving device for rotating the sheave 20 and is installed on the hoisting machine mount 40. The sheave 20 includes a plurality of sheave grooves 21 and a shaft 22. A rope is wound around each of the plurality of sheave grooves 21, and a car and a counterweight are respectively attached to ends of these ropes.

  The shaft 22 is joined to the hoisting machine 10 and transmits the driving operation of the hoisting machine 10 to the sheave 20. When the hoisting machine 10 is driven, the sheave 20 is rotated via the shaft 22, and the rope wound around the sheave groove 21 moves in the circumferential direction of the sheave groove 21. A car and a counterweight attached to the hoist lift and lower the hoistway.

  The reason why the rope wound around the sheave groove 21 moves in the circumferential direction of the sheave groove 21 is because the frictional force generated between the rope and the sheave groove 21 is used. The sheave 20 (or the sheave groove 21) is made of cast iron, and wears and collapses when a frictional force is applied continuously for a long period of time. Therefore, the groove surface needs to be polished by the groove polishing apparatus 30 as will be described later. The sheave groove 21 is round here, but may be undercut or V-shaped.

  The groove polishing device 30 is a device for polishing a plurality of sheave grooves 21 formed in the sheave 20, and is always installed below the sheave 20 and on the hoisting machine stand 40. The groove polishing apparatus 30 includes a polishing jig 31, a support bar 32, a lever 33, a stand 34, and the like.

  The polishing jig 31 is a member that contacts the sheave groove 21 during polishing and polishes the sheave groove 21. The support bar 32 includes two support bars, a support bar 32A (FIGS. 6 and 7) and a support bar 32 </ b> B (FIGS. 8 and 9), and is a member for supporting the polishing jig 31. The support bar 32 itself is inserted into and supported by the holes 333A and 333B (FIGS. 7 and 9) of the two levers 33.

  The lever 33 is a member for separating the polishing jig 31 from the sheave groove 21 or adjusting the polishing position and the polishing amount, and rotates to a position below the sheave 20 and off from just below the sheave groove 21. Installed as possible. The stand 34 is a member for rotatably supporting the lever 33 and is installed on the hoisting machine mount 40. Details of the groove polishing apparatus 30 will be described later (FIGS. 2 to 10).

  The hoisting machine base 40 is a member for supporting the hoisting machine 10, the sheave 20, and the groove polishing apparatus 30. The beam 50 is a member for supporting the hoisting machine base 40. The machine room floor 60 is a member for supporting the beam 50. The baffle wheel 70 is a member for guiding one end of a rope wound around the sheave groove 21 to a counterweight or a car.

(2) Each cross-sectional structure FIG. 2: shows the AA cross-section structure of FIG. 1 at the time of a grinding | polishing operation start. In the AA cross section, the groove polishing apparatus 30 includes a lever pin 331, a pressing force adjusting mechanism 332, and the like in addition to the above-described configuration (31 to 34). The lever pin 331 is a member for rotatably supporting the lever 33 on the stand 34.

  The pressing force adjusting mechanism 332 is a device for generating a pressing force necessary for polishing by pressing the polishing jig 31 against the sheave groove 21. The pressing force adjusting mechanism 332 includes a mechanism that moves up and down one end of the lever 33 with the lever pin 331 as a fulcrum, and a mechanism that limits the maximum distance (polishing amount) when pushed upward to a predetermined polishing amount δ.

  The mechanism for raising and lowering one end of the lever 33 in the pressing force adjusting mechanism 332 includes a spring seat adjusting nut 3321, a spring seat 3322, a spring 3323, and the like. When the spring seat adjustment nut 3321 is rotated, the spring seat 3322 can be moved up and down to adjust the pressing force. Specifically, when the spring seat adjustment nut 3321 is rotated so as to move the spring seat 3322 upward, the spring 3323 is bent and one end of the lever 33 can be pushed upward. Therefore, the pressing force for pressing the polishing jig 31 against the sheave groove 21 can be increased.

  On the other hand, when the spring seat adjusting nut 3321 is rotated so as to move the spring seat 3322 downward, the bending of the spring 3323 is reduced, and one end of the lever 33 can be moved downward. Therefore, the pressing force for pressing the polishing jig 31 against the sheave groove 21 can be reduced or the polishing jig 31 can be separated from the sheave groove 21.

  The mechanism for limiting the polishing amount in the pressing force adjusting mechanism 332 includes a nut 3324 and a stopper 3325. The nut 3324 is a member for adjusting the polishing amount δ, and the stopper 3325 limits the maximum moving distance of one end of the lever 33 so that the sheave groove 21 is not polished by the polishing amount δ adjusted by the nut 3324. It is a member for doing. At the start of the polishing operation, the polishing amount δ remains at the initially set value δ because the polishing jig 31 has not yet polished the sheave groove 21. As the polishing progresses, it gradually decreases to zero.

  FIG. 3 shows a cross-sectional configuration taken along the line AA of FIG. 1 at the end of the polishing operation. At the end of the polishing operation, the polishing amount δ is zero. The groove polishing apparatus 30 includes a polishing jig moving mechanism 333 in addition to the above-described configurations (31 to 34, 331, 332).

  The polishing jig moving mechanism 333 is a device for moving the polishing jig 31 in the direction of the shaft 22 of the sheave 20. The polishing jig moving mechanism 333 includes a support rod pulley 3331, a polishing jig driving pulley 3332, a pulley shaft 3333, a pulley stand 3334, and a belt 3335.

  The support rod pulley 3331 is a member that is attached to the end of the support rod 32B (FIGS. 8 and 9) and rotates the support rod 32B. When the support bar 32B is rotated, the polishing jig 31 supported by the support bar 32B moves in the direction of the shaft 22 of the sheave 20. The polishing jig drive pulley 3332 is a member for rotating the support rod pulley 3331 via the belt 3335.

  The pulley shaft 3333 is a member for rotating the polishing jig driving pulley 3332. A handle for rotating the pulley shaft 3333 is attached to the end of the pulley shaft 3333, and the pulley shaft 3333 can be rotated by turning the handle. The pulley stand 3334 is a member for supporting the polishing jig driving pulley 3332. The belt 3335 is a member for transmitting the rotation operation of the polishing jig driving pulley 3332 to the support rod pulley 3331.

  With this polishing jig moving mechanism 333, the polishing jig 31 can be freely moved to each position of the plurality of sheave grooves 21 even immediately under the sheave 20, which is difficult to work.

  FIG. 4 shows a cross-sectional configuration taken along the line AA of FIG. 1 during normal operation of the elevator apparatus 1. During normal operation of the elevator apparatus 1, the spring seat 3322 is moved downward by turning the spring seat adjustment nut 3321, thereby eliminating the bending of the spring 3323 and lowering the end portion of the lever 33. As a result, the top of the polishing jig 31 can be moved to a position where it does not contact the sheave groove 21. Therefore, the normal operation of the elevator apparatus 1 can be performed while the groove polishing apparatus 30 is always installed.

  FIG. 5 shows an AA cross-sectional configuration of FIG. 1 during the polishing operation. During the polishing operation, the spring seat adjustment nut 3321 is turned to move the spring seat 3322 upward, thereby bending the spring 3323 and pushing up the end of the lever 33. At this time, a pressing force F <b> 2 by the spring 3323 is generated at the end of the lever 33.

  With respect to this pressing force F2, a pressing force F1 at which the top of the polishing jig 31 pushes up the sheave groove 21 is calculated by the following equation (1). In consideration of the following formula (1), the groove polishing apparatus 30 can generate a large pressing force F1 required for polishing by generating a small pressing force F2.

  Further, when the top of the polishing jig 31 is in contact with the sheave groove 21, the groove polishing apparatus 30 is parallel to the tangent line A1 of the bottom circle of the sheave groove 21 at the contact point and is a fulcrum. The lever pin 331 has a structure that substantially coincides with the line A2 passing through the axial center of the lever pin 331 (structure in which the interval A3≈0). This is because the same pressing force F1 is generated regardless of whether the sheave 20 rotates in the right direction or the left direction.

  Regarding the relationship between the pressing forces F1 and F2 and the rotation direction, the following equation (2) is generally known. In consideration of the following formula (2), when the distance A3 between the tangent line A1 and the line A2 is 0, the formula (1) is the same, and the pressing force F1 is constant regardless of the rotation direction of the sheave 20. .

  In the present embodiment, the groove polishing device 30 is a device that polishes the sheave groove 21 while being always installed, and therefore polishes the sheave groove 21 without removing the rope from the sheave groove 21. In this case, the elevator apparatus 1 is operated at a low speed to rotate the sheave 20, but in order to obtain the rotation amount necessary for polishing, several to several tens of reciprocating operations are required.

  That is, polishing is performed while the sheave 20 is rotated in either the right rotation or the left rotation. Even if the rotation directions are different, the pressing force F1 is constant and does not vary as described above. Therefore, it is not necessary to adjust the pressing force F1 according to the rotation direction, so that the polishing operation can be performed efficiently.

  6 shows a BB cross-sectional configuration of FIG. The polishing jig 31 polishes the sheave groove 21 by bringing the top portion into contact with the sheave groove 21. The polishing jig 31 is supported by a support bar 32A. The support bar 32 </ b> A is inserted into the holes 333 </ b> A (FIG. 7) of the two levers 33 and supported by the levers 33. A nut 3336A is provided at the end of the support bar 32A so that the support bar 32A does not come out of the hole 333A of the lever 33.

  FIG. 7 shows a cross-sectional configuration taken along the line CC of FIG. The support bar 32A is inserted into and supported by the respective holes 333A of the two levers 33. The polishing jig 31 includes a grindstone 311 and a holder 312. The grindstone 311 is provided on the top of the polishing jig 31 and actually polishes the sheave groove 21. The holder 312 is supported by the support bar 32A so as to be movable in the direction of the axis 22 of the sheave 20. The grindstone 311 is formed by using an alumina abrasive or a silicon carbide abrasive as the abrasive and solidifying it with a binder such as resin or clay.

  FIG. 8 shows a DD cross-sectional configuration of FIG. The polishing jig 31 includes a grindstone 311 and a holder 312, and a grindstone seat 313 and an adjusting screw 314. The grindstone seat 313 supports the grindstone 311, while being supported by the upper end of the adjustment screw 314. The adjustment screw 314 is fitted with the screw 315 and attached to the holder 312 to adjust the protrusion amount of the grindstone 311. When the adjustment screw 314 is rotated, the grindstone seat 313 is moved up and down, and the grindstone seat 313 is moved up and down to move the grindstone 311 up and down.

  The support bar 32 </ b> B supports the polishing jig 31 and is inserted into the holes 333 </ b> B (FIG. 9) of the two levers 33 and supported by the levers 33. A nut 3336B is provided at the end of the support bar 32B so that the support bar 32B does not come out of the hole 333B of the lever 33.

  FIG. 9 shows an EE cross-sectional configuration of FIG. In the polishing jig 31, the holder 312 is fitted to the screw 316 and supported by the support bar 32B. The support bar 32B is inserted into the hole 333B of the two levers 33 and supported by the lever 33. A support rod pulley 3331 is attached to one end of the support rod 32B and is fixed by a nut 3336B. When the support rod pulley 3331 is rotated together with the nut 3336B, the support rod 32B is rotated, and the holder 312 fitted to the screw 316 moves in the direction of the axis 22 of the sheave 20.

  FIG. 10 shows an enlarged configuration of the pressing force adjusting mechanism 332. The pressing force adjusting mechanism 332 includes the above-described spring seat adjusting nut 3321, spring seat 3322, spring 3323, nut 3324 and stopper 3325, as well as a rod stand 3326, a rod pin 3327, a spring rod 3328, a plurality of screws and holes 3329A to 3229F. Is provided.

  The rod stand 3326 is installed on the hoisting machine base 40 and supports the spring rod 3328 via the rod pin 3327. The rod pin 3327 and the spring rod 3328 are joined by welding or the like, and the spring rod 3328 is rotatably attached to the rod stand 3326.

  A screw 3329B provided in the hole 3329A is formed as a male screw in the spring rod 3328, and a spring seat adjusting nut 3321 is fitted and attached to the screw 3329B. A spring seat 3322 having a hole 3329C is rotatably installed above the spring seat adjusting nut 3321. A spring 3323 is installed between the spring seat 3322 and the lever 33. When the spring seat adjusting nut 3321 is rotated, the spring seat 3322 is moved up and down, and the lever 33 is rotated by the spring seat adjusting nut 3321 through the spring 3323 with the lever pin 331 as a fulcrum.

  A screw 3329F is formed as a male screw at the upper end of the spring rod 3328 that passes through the holes 3329D and 3329E, and a nut 3324 is fitted and attached to the screw 3329F. The nut 3324 and the stopper 3325 are joined by welding or the like. Therefore, when the nut 3324 is rotated, the stopper 3325 moves up and down. As a result, the polishing amount δ can be adjusted by adjusting the distance between the stopper 3325 and the lever 33.

  By making it possible to adjust the polishing amount δ by the stopper 3325, the polishing amount δ is limited as the upper limit of the groove grinding amount even immediately below the sheave 20 which is difficult to work, and the sheave groove 21 is overcut. Can be prevented.

(3) Effects of this Embodiment As described above, according to the groove polishing apparatus 30 and the elevator apparatus 1 of this embodiment, the pressing force adjusting mechanism 332 and the polishing jig moving mechanism 333 are disengaged from directly below the sheave 20. In the normal operation of the elevator apparatus 1, the spring seat adjusting nut 3321 of the pressing force adjusting mechanism 332 is operated to separate the polishing jig 31 from the sheave groove 21, and during polishing work, polishing is performed. The pulley shaft 3333 of the jig moving mechanism 333 is operated to move the polishing jig 31 in the direction of the shaft 22 so as to be aligned with the position directly below the sheave groove 21 and the spring seat adjusting nut 3321 of the pressing force adjusting mechanism 332 is operated. Then, since the polishing jig 31 is brought into contact with the sheave groove 21 to adjust the pressing force, the efficiency of the polishing work can be improved.

  In addition, according to this Embodiment, since the frequency of grinding | polishing operation | work can be improved, it can avoid the situation where a micro processus | protrusion arises on the surface of the sheave groove 21 for some reason, and a rope damage arises. it can. Further, even if a small protrusion that does not require large-scale molding is generated, the groove polishing device 30 is always installed. The protrusion can be removed. Therefore, the lifetime of the rope can be improved, and the reliability of the entire elevator apparatus 1 can be improved.

(4) Other Embodiments FIG. 11 shows a cross-sectional configuration taken along the line AA of FIG. 1 in another embodiment. The groove polishing apparatus 30A of the elevator apparatus 1A according to another embodiment is configured by including an automation apparatus 334 instead of the pressing force adjusting mechanism 332 and the polishing jig driving pulley 3332 of the polishing jig moving mechanism 333. Different from the groove polishing apparatus 30. Hereinafter, regarding the groove polishing apparatus 30A, the same components as those of the groove polishing apparatus 30 are denoted by the same reference numerals, description thereof is omitted, and different structures will be described.

  The automation device 334 includes an actuator 3341, a motor-equipped polishing jig drive pulley 3342, a controller 3343, and an elevator control panel 3344. The actuator 3341 is installed between the lever 33 and the hoisting machine base 40 in place of the pressing force adjusting mechanism 332, and moves one end of the lever 33 up and down.

  A polishing jig driving pulley 3342 with a motor is installed at a place where the polishing jig driving pulley 3332 is installed instead of the polishing jig driving pulley 3332 of the polishing jig moving mechanism 333, and the support rod pulley 3331 is attached via the belt 3335. Rotate. The controller 3343 controls the operation of the actuator 3341 and the motor-driven polishing jig drive pulley 3342 in cooperation with an elevator control panel 3344 that drives the hoisting machine 10.

  A specific operation will be described. First, during the normal operation of the elevator apparatus 1A, as shown in FIG. 11, the actuator 3341 does not operate, and the lever 33 stops at the lowered position. In this case, the polishing jig 31 is separated from the sheave groove 21. Next, during the polishing operation, the controller 3343 operates the actuator 3341 and the elevator control panel 3344 causes the elevator apparatus 1A to reciprocate at a low speed.

  When the actuator 3341 pushes up one end of the lever 33, the polishing jig 31 comes into contact with the sheave groove 21 and the polishing operation is started. When changing the sheave groove 21 to be polished, the controller 3343 operates the polishing jig driving pulley 3342 with a motor in the state shown in FIG. The polishing jig 31 moves in the direction of the shaft 22 when the polishing jig driving pulley 3342 with a motor rotates the support rod pulley 3331.

  A program for executing these series of operations is stored in advance in the elevator control panel 3344. When the polishing amount δ is controlled, information on the number of reciprocating operations and the pressing force may be stored in the elevator control panel 3344 in advance.

(5) Effects of other embodiments As described above, according to the groove polishing apparatus 30A in the other embodiments, the polishing operation can be automated, so that the efficiency of the polishing operation can be further improved. . Further, even with a small pressing force F2, a large pressing force F1 required for polishing can be generated, so that the actuator 3341 can be downsized.

  In the present embodiment and other embodiments, the number of polishing jigs 31 has been described as one. However, the present invention is not limited to this, and for example, a plurality of polishing jigs 31 corresponding to the number of sheave grooves 21 may be provided. . In this case, since it is not necessary to move the polishing jig 31 in the direction of the shaft 22, it is possible to further improve the efficiency of the polishing operation and to simplify the structures of the groove polishing apparatuses 30 and 30A.

1, 1A Elevator device 10 Hoisting machine 20 Sheave 21 Sheave groove 22 Shaft 30 Groove polishing device 31 Polishing jig 32 Support rod 33 Lever 331 Lever pin 332 Pushing force adjusting mechanism 333 Polishing jig moving mechanism 34 Stand

Claims (8)

In the groove polishing apparatus for polishing the sheave groove formed in the sheave,
The groove polishing apparatus comprises:
Always installed below the sheave,
A stand, a lever, a pressing force adjusting mechanism, and a polishing jig are provided.
The stand is
The lever is supported rotatably,
The lever is
It is installed at a position outside the sheave groove,
One end is rotatably supported by the stand,
The other end is supported by the pressing force adjusting mechanism,
A support rod is provided between the one end and the other end,
The support bar supports the polishing jig located immediately below the sheave groove,
The pressing force adjusting mechanism is
By moving the other end of the lever upward or downward, the lever is rotated with one end of the lever as a fulcrum,
The polishing jig is
When the other end of the lever is supported by the support bar and moves upward, the sheave groove is polished by contacting the sheave groove, and when the other end of the lever moves downward, the sheave A groove polishing apparatus characterized by being separated from the groove. The support bar is
Extending in the axial direction of the sheave and installed just below the sheave groove,
The groove polishing apparatus according to claim 1, wherein the polishing jig is supported so as to be movable in an axial direction of the sheave. The polishing jig is
A holder that is supported by fitting with the support rod;
A whetstone that is supported by the holder while contacting the sheave groove,
The support bar is
A support rod pulley for rotating the support rod;
The groove polishing apparatus comprises:
The polishing jig moving mechanism having a structure for moving the holder fitted to the support rod in the axial direction of the sheave by rotating the support rod pulley is provided. The groove polishing apparatus as described. The pressing force adjusting mechanism is
The groove polishing apparatus according to any one of claims 1 to 3, further comprising a stopper for limiting a moving distance when the other end of the lever moves upward to a predetermined moving distance. . The lever is
When the top of the polishing jig is in contact with the sheave groove, the tangent of the bottom circle of the sheave groove at the contact point is parallel to the tangent and the lever rotates. The groove polishing apparatus according to claim 1, wherein the groove polishing apparatus has a structure in which a line passing through a fulcrum substantially matches. The pressing force adjusting mechanism is
A spring that biases the pressing force against the other end of the lever;
A spring seat and a spring seat adjustment nut for adjusting the pressing force biased against the other end of the lever by adjusting the deflection of the spring are provided. A groove polishing apparatus according to claim 1. The pressing force adjusting mechanism is
The groove polishing apparatus according to any one of claims 1 to 5, further comprising an actuator that moves a position of the other end of the lever up and down. In an elevator apparatus equipped with a groove polishing device for polishing a sheave groove formed in a sheave,
The groove polishing apparatus comprises:
Always installed below the sheave,
A stand, a lever, a pressing force adjusting mechanism, and a polishing jig are provided.
The stand is
The lever is supported rotatably,
The lever is
It is installed at a position outside the sheave groove,
One end is rotatably supported by the stand,
The other end is supported by the pressing force adjusting mechanism,
A support rod is provided between the one end and the other end,
The support bar supports the polishing jig located immediately below the sheave groove,
The pressing force adjusting mechanism is
By moving the other end of the lever upward or downward, the lever is rotated with one end of the lever as a fulcrum,
The polishing jig is
When the other end of the lever is supported by the support bar and moves upward, the sheave groove is contacted with the sheave groove to polish the sheave groove, and when the other end of the lever moves downward, the sheave The elevator apparatus characterized by leaving | separating from a groove | channel.