WO2024084620A1 - Bearing replacement assisting tool for elevator hoist and bearing replacement method - Google Patents

Bearing replacement assisting tool for elevator hoist and bearing replacement method Download PDF

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Publication number
WO2024084620A1
WO2024084620A1 PCT/JP2022/038905 JP2022038905W WO2024084620A1 WO 2024084620 A1 WO2024084620 A1 WO 2024084620A1 JP 2022038905 W JP2022038905 W JP 2022038905W WO 2024084620 A1 WO2024084620 A1 WO 2024084620A1
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WO
WIPO (PCT)
Prior art keywords
worm shaft
bearing
gear box
stop member
hoist
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PCT/JP2022/038905
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French (fr)
Japanese (ja)
Inventor
伸幸 吉野
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三菱電機ビルソリューションズ株式会社
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Application filed by 三菱電機ビルソリューションズ株式会社 filed Critical 三菱電機ビルソリューションズ株式会社
Priority to PCT/JP2022/038905 priority Critical patent/WO2024084620A1/en
Publication of WO2024084620A1 publication Critical patent/WO2024084620A1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B11/00—Main component parts of lifts in, or associated with, buildings or other structures
    • B66B11/04—Driving gear ; Details thereof, e.g. seals
    • B66B11/08—Driving gear ; Details thereof, e.g. seals with hoisting rope or cable operated by frictional engagement with a winding drum or sheave

Definitions

  • This disclosure relates to technology to assist in the replacement of bearings in elevator hoists.
  • Patent Document 1 discloses technology related to elevator hoists.
  • the load on the rotor shaft is supported by a support base and one of the bearing devices, so that the other bearing device can be removed and the stator can be pulled out without using a lifting device such as a crane, and the motor and other components can be disassembled.
  • This disclosure has been made to solve the problems described above, and aims to provide a bearing replacement aid and a bearing replacement method that can restrict the relative axial movement of the worm shaft during bearing replacement work for an elevator hoist.
  • the hoist comprises a motor unit, a worm shaft one end of which is connected to the rotating shaft of the motor unit, a gear box through which the worm shaft is inserted, a thrust bearing attached to the gear box and supporting the worm shaft, and a brake wheel fixed to the worm shaft between the gear box and the motor unit.
  • the bearing replacement aid includes a first stop member that is sandwiched between the brake wheel and the gear box above the worm shaft to stop the worm shaft from moving relative to the gear box when the thrust bearing is pulled out of the gear box.
  • the present disclosure also applies to a bearing replacement method for an elevator hoist.
  • the hoist includes a motor unit, a worm shaft one end of which is connected to the rotating shaft of the motor unit, a gear box through which the worm shaft is inserted, a thrust bearing attached to the gear box and supporting the worm shaft, and a brake wheel fixed to the worm shaft between the gear box and the motor unit.
  • the bearing replacement method includes the steps of installing a first stop member between the brake wheel and the gear box, pulling out the thrust bearing from the worm shaft, and removing the first stop member from the hoist.
  • the present disclosure also applies to a bearing replacement method for an elevator hoist.
  • the hoist includes a motor unit, a worm shaft one end of which is connected to the rotating shaft of the motor unit, a gear box through which the worm shaft is inserted, a thrust bearing attached to the gear box and supporting the worm shaft, and a brake wheel fixed to the worm shaft between the gear box and the motor unit.
  • the bearing replacement method includes the steps of installing a second stop member between the brake wheel and the motor unit, attaching the thrust bearing to the worm shaft, and removing the second stop member from the hoist.
  • the bearing replacement aid disclosed herein can restrict the relative axial movement of the worm shaft during bearing replacement work. As a result, the work efficiency of bearing replacement work is improved.
  • FIG. 1 is a diagram showing the external configuration of a hoist to which a bearing replacement auxiliary tool in an embodiment is applied;
  • FIG. 2 is a schematic diagram showing the internal structure around the gear box of the hoisting machine. 13 is a schematic diagram for explaining the removal operation of the thrust bearing.
  • FIG. FIG. 2 is a perspective view showing a bearing replacement auxiliary tool for a hoist according to the present embodiment.
  • 4A to 4C are three views of a first stop member.
  • 11A and 11B are three-view diagrams of a second stop member.
  • 10 is a schematic diagram showing a state in which a first stop member is disposed on a hoisting machine.
  • FIG. 13 is a schematic diagram showing a state in which a second regulating member is disposed on the hoisting machine.
  • FIG. 13 is a diagram showing a state in which the first regulating member is installed on the hoist.
  • FIG. 11 is a schematic view showing a state in which the first stop member is installed on the hoist, as seen from the gear box side towards the brake wheel with the gear box being see-through.
  • FIG. 11 is a partial enlarged view showing a state in which the second regulating member is installed on the hoist.
  • 1 is a schematic diagram showing a state in which a second regulating member is installed on a hoist, as seen from the motor unit side toward the brake wheel with the motor unit being transparent.
  • Embodiment 1 External configuration of a hoist to which a bearing replacement auxiliary tool according to an embodiment is applied.
  • Fig. 1 is a diagram showing the external configuration of a hoist to which a bearing replacement auxiliary tool according to an embodiment is applied.
  • Fig. 2 is a schematic diagram showing the internal structure around a gear box of the hoist.
  • the hoist 10 is a worm hoist for an elevator.
  • the hoist 10 is installed in the machine room of the elevator.
  • the hoist 10 is equipped with a gear box 12, a motor unit 14, a brake wheel 16, a hoisting sheave 17, and a worm shaft 20 as the main components related to the bearing replacement work. Note that the hoist 10 is equipped with various other components in addition to these components, but the description of these will be omitted.
  • the gear box 12 constitutes part of the structure of the hoist 10.
  • the gear box 12 has a thrust bearing hole 121 and a ground bearing hole 122 formed in opposing positions.
  • the side of the gear box 12 on which the ground bearing hole 122 is formed is referred to as the "ground side”
  • the side on which the thrust bearing hole 121 is formed is referred to as the "thrust side.”
  • the gear box 12 includes a bearing box 22 in which the thrust bearing 24 is housed.
  • the bearing box 22 is fitted into the thrust bearing hole 121 with the thrust bearing 24 housed inside.
  • a bearing cover 18 is attached to the opening of the bearing box 22 by a cover bolt 19.
  • a gland bearing 26 is fitted into the gland bearing hole 122.
  • the worm shaft 20 is inserted from the ground side to the thrust side of the gear box 12 and is supported by the thrust bearing 24 and the ground bearing 26.
  • the worm gear 202 of the worm shaft 20 is screwed into a link gear (not shown) inside the gear box 12.
  • the link gear transmits the rotational force of the worm shaft 20 to the winding sheave 17.
  • the axial direction of the worm shaft 20 from the ground side to the thrust side is referred to as the "thrust direction”
  • the direction from the thrust side to the ground side is referred to as the "ground direction”.
  • the motor unit 14 is detachably attached to the structure of the hoist 10 with bolts.
  • the ground side end of the worm shaft 20 is connected to the rotating shaft of the motor unit 14. When the rotating shaft of the motor unit 14 rotates, the worm shaft 20 rotates accordingly.
  • the brake wheel 16 is a part of the brake mechanism and is fixed so as to rotate together with the worm shaft 20.
  • the brake wheel 16 is disposed between the gear box 12 and the motor section 14 on the worm shaft 20.
  • Fig. 3 is a schematic diagram for explaining the removal of the thrust bearing.
  • an operator When removing the thrust bearing 24, an operator first removes the cover bolt 19 and removes the bearing cover 18. Then, two prepared jack bolts 28 are screwed into the threaded holes of the bearing housing 22 and tightened evenly. As a result, the bearing housing 22 together with the thrust bearing 24 is gradually pulled out of the thrust bearing hole 121 in the thrust direction of the worm shaft 20.
  • the thrust bearing 24 is tightly engaged with the worm shaft 20. For this reason, when the thrust bearing 24 is pulled out in the thrust direction, the worm shaft 20 may also be pulled in the thrust direction.
  • blocks of wood or other material have problems with strength and ease of use.
  • the bearing replacement aid of this embodiment is an aid for restricting the relative movement of the worm shaft 20 with respect to the gear box 12 during the replacement work of the thrust bearing 24.
  • FIG. 4 is a perspective view showing the bearing replacement aid of the hoist of this embodiment.
  • the bearing replacement aid includes a first stop member 30 and a second stop member 40.
  • FIG. 5 is a three-sided view of the first stop member.
  • FIG. 6 is a three-sided view of the second stop member.
  • the first stop member 30 is an auxiliary tool that is used by being sandwiched between the brake wheel 16 and the ground side of the gear box 12 above the worm shaft 20.
  • the first stop member 30 has a first planar portion 302 and a second planar portion 304.
  • the first planar portion 302 and the second planar portion 304 are both rectangular in shape, and one of the longitudinal sides is connected to each other so that the cross section perpendicular to the longitudinal direction is mountain-shaped. There is no limitation on the angle between the first planar portion 302 and the second planar portion 304.
  • the first stop member 30 has two planes connected so that the angle between the first planar portion 302 and the second planar portion 304 is a right angle in the cross section perpendicular to the longitudinal direction.
  • the first stop member 30 can be, for example, an L-shaped angle bar of L3 x 30 x 30 mm.
  • the total length of the first stop member 30 in the longitudinal direction is set taking into consideration the positional relationship between the gear box 12 and the brake wheel 16 of the hoist 10.
  • FIG. 7 is a schematic diagram showing the arrangement of the first stop member on the hoist.
  • the first stop member 30 is set to a total length that fits in the longitudinal direction between the ground side of the gear box 12 of the hoist 10 and the brake wheel 16 above the worm shaft 20.
  • the total length of the first stop member 30 in the longitudinal direction is set to a length slightly shorter than the distance between the side portion 123 on the ground side of the gear box 12 and the side portion 161 of the brake wheel 16 facing said side portion.
  • the total length of the first stop member 30 in the longitudinal direction is, for example, 70 mm.
  • the first stop member 30 has a first chamfered portion 306 at both corners on the edge side of the first flat surface portion 302. Similarly, the first stop member 30 has a first chamfered portion 306 at both corners on the edge side of the second flat surface portion 304. There are no limitations on the shape and size of the first chamfered portion 306. Here, the first chamfered portion 306 is formed over a range of approximately 1/3 of the short-side length of the first flat surface portion 302 and the second flat surface portion 304. If the first stop member 30 is an L-shaped angle bar, for example, L3 x 30 x 30, the first chamfered portion 306 has a side of 10 mm.
  • a label portion 308 with the words "Ground Side” written on it is attached to the first flat portion 302.
  • the label portion 308 may cover the entire surface of the first flat portion 302.
  • the color of the label portion 308 is preferably a highly visible color such as a fluorescent color.
  • the configuration of the label portion 308 is not essential to the first stop member 30.
  • the second stop member 40 is an auxiliary tool that is used by being sandwiched between the brake wheel 16 and the motor unit 14 above the worm shaft 20.
  • the structure of the second stop member 40 can be the same as that of the first stop member 30, except for the overall length in the longitudinal direction.
  • the second stop member 40 has a first planar portion 402 and a second planar portion 404.
  • the first planar portion 402 and the second planar portion 404 are both rectangular in shape, and one side in the longitudinal direction is connected to each other so that the cross section perpendicular to the longitudinal direction is mountain-shaped. There is no limitation on the angle between the first planar portion 402 and the second planar portion 404.
  • the second stop member 40 has two planes connected so that the angle between the first planar portion 402 and the second planar portion 404 is a right angle in the cross section perpendicular to the longitudinal direction.
  • an L-shaped angle bar of L3 x 30 x 30 mm can be used for the second stop member 40.
  • the total length of the second regulating member 40 in the longitudinal direction is set taking into consideration the positional relationship between the motor unit 14 and the brake wheel 16 of the hoist 10.
  • FIG. 8 is a schematic diagram showing the arrangement of the second regulating member on the hoist.
  • the brake wheel 16 has a cylindrical protrusion 163 protruding in the ground direction of the worm shaft 20 at the center where the worm shaft 20 is fixed.
  • the total length of the second regulating member 40 in the longitudinal direction is set to a length slightly shorter than the distance between the side surface 142 on the brake wheel 16 side of the motor unit 14 and the side surface 164 of the protrusion 163 facing the side surface 142.
  • the total length of the second regulating member 40 in the longitudinal direction is, for example, 80 mm.
  • the second restricting member 40 has second chamfered portions 406 at both corners on the edge side of the first flat surface portion 402. Similarly, the second restricting member 40 has second chamfered portions 406 at both corners on the edge side of the second flat surface portion 404. There is no limitation on the size of the second chamfered portions 406. Here, the second chamfered portions 406 are formed in a range of approximately 1/3 of the short-side length of the first flat surface portion 402 and the second flat surface portion 404. If the second restricting member 40 is an L-shaped angle bar of, for example, L3 x 30 x 30, the second chamfered portions 406 have a side length of 10 mm.
  • a label portion 408 with "Motor Side” written on it is attached to the first flat portion 402.
  • the label portion 408 may cover the entire surface of the first flat portion 402.
  • the color of the label portion 408 is preferably a highly visible color such as a fluorescent color.
  • the configuration of the label portion 408 is not essential to the second restricting member 40.
  • Preparation Process Bearing Cover Removal Process The worker removes the bearing cover 18 by removing the cover bolts 19. This exposes the thrust bearing 24 fitted inside the bearing housing.
  • Fig. 9 is a diagram showing a state in which the first stop member is installed on the hoist.
  • Fig. 10 is a schematic diagram showing a state in which the first stop member is installed on the hoist, seen from the gear box side toward the brake wheel with the gear box seen through.
  • the brake wheel 16 has a cylindrical protrusion 162 that protrudes in the thrust direction at the center where the worm shaft 20 is fixed.
  • the first stop member 30 is arranged on top of the protrusion 162 of the brake wheel 16 with its longitudinal direction aligned with the axial direction of the worm shaft 20 and oriented so as to be convex upward. This restricts the relative movement of the brake wheel 16 and the worm shaft 20 fixed thereto in the thrust direction with respect to the gear box 12.
  • Second step Removal step of thrust bearing 24 An operator screws two prepared jack bolts 28 into the screw holes of the bearing box 22 and tightens them evenly.
  • the worm shaft 20 is restricted in its relative movement in the thrust direction with respect to the gear box 12 by the first stop member 30. Therefore, the bearing box 22 is gradually pulled out in the thrust direction from the thrust bearing hole 121, leaving the worm shaft 20 behind. As a result, the thrust bearing 24 fitted inside the bearing box 22 is pulled out from the worm shaft 20.
  • Fig. 11 is a partially enlarged view showing the state in which the second regulating member is installed on the hoist.
  • Fig. 12 is a schematic view showing the state in which the second regulating member is installed on the hoist, seen from the motor unit side toward the brake wheel with the motor unit seen through.
  • the second stop member 40 is arranged with its longitudinal direction aligned with the axial direction of the worm shaft 20, and is disposed between the side surface 164 of the protruding portion 163 of the brake wheel 16 and the side surface 142 of the motor unit 14 in an upwardly convex orientation. This restricts the relative movement of the brake wheel 16 and the worm shaft 20 fixed thereto in the ground direction with respect to the motor unit 14 and the gear box 12.
  • the first stop member 30 When the thrust bearing 24 is being pulled out from the gear box 12, the first stop member 30 is sandwiched between the brake wheel 16 and the gear box 12 above the worm shaft 20, and can restrict the relative movement of the worm shaft 20 with respect to the gear box 12. This improves the efficiency of the work of pulling out the thrust bearing 24 from the gear box 12.
  • the first flat portion 302 and the second flat portion 304 are connected so that the cross section perpendicular to the longitudinal direction has an upwardly convex mountain shape. With this configuration, the first stop member 30 can be stably installed above the worm shaft 20.
  • the first stop member 30 is configured so that the angle between the first planar portion 302 and the second planar portion 304 is a right angle in a cross section perpendicular to the longitudinal direction.
  • the first stop member 30 can be formed using a general-purpose L-shaped angle bar, making it easy to manufacture the first stop member 30.
  • the first stop member 30 has sufficient strength to act as a resistance material when compressed in the longitudinal direction.
  • the first stop member 30 has a first chamfered portion 306 at the corner of the first flat portion 302 and the second flat portion 304. This configuration makes it possible to prevent the corner from getting caught when the first stop member 30 is installed in a narrow portion of the hoist 10, making installation easier and preventing damage to the hoist 10.
  • the first chamfered portion 306 also contributes to preventing injury to workers handling the first stop member 30.
  • the second restricting member 40 is sandwiched between the brake wheel 16 and the motor unit 14 above the worm shaft 20, and restricts the relative movement of the worm shaft 20 with respect to the motor unit 14. This improves the efficiency of the work of attaching the thrust bearing 24 to the gear box 12.
  • the first flat portion 402 and the second flat portion 404 are connected so that the cross section perpendicular to the longitudinal direction has an upwardly convex mountain shape. With this configuration, the second regulating member 40 can be stably installed above the worm shaft 20.
  • the second stop member 40 is configured so that the angle between the first planar portion 402 and the second planar portion 404 is a right angle in a cross section perpendicular to the longitudinal direction.
  • the second stop member 40 can be formed using a general-purpose L-shaped angle bar, making it easy to manufacture the second stop member 40.
  • the second stop member 40 has sufficient strength to act as a resistance material when compressed in the longitudinal direction.
  • the second regulating member 40 has second chamfered portions 406 at both corners of the first flat portion 402 and the second flat portion 404. This configuration makes it possible to prevent the corners from getting caught when the second regulating member 40 is installed in a narrow section of the hoist 10, making installation easier and preventing damage to the hoist 10.
  • the second chamfered portions 406 also contribute to preventing injury to workers handling the second regulating member 40.
  • bearing replacement aid of this embodiment may employ the following modifications.
  • the bearing replacement aid may be configured to include only one of the first stop member 30 and the second stop member 40.
  • the first stop member 30 may be set to a length that allows it to be installed between the side surface 123 on the ground side of the gear box 12 and the end surface of the protrusion 162 that faces the side surface 123, and may be positioned so that it abuts against the worm shaft 20.
  • the second stop member 40 may be disposed on the upper portion of the protruding portion 163 of the brake wheel 16 with its longitudinal direction aligned with the axial direction of the worm shaft 20 and convex upward.
  • the total longitudinal length of the second stop member 40 may be set to be slightly shorter than the distance between the side portion 142 of the motor unit 14 on the brake wheel 16 side and the side portion of the brake wheel 16 facing the side portion 142.

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  • Engineering & Computer Science (AREA)
  • Civil Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Gear Transmission (AREA)
  • Cage And Drive Apparatuses For Elevators (AREA)

Abstract

Provided is a bearing replacement assisting tool for restricting a relative movement of a worm shaft in an axial direction in a bearing replacement operation for an elevator hoist. The hoist comprises a motor unit, a worm shaft one end of which is coupled to a rotating shaft of the motor unit, a gearbox through into which the worm shaft is inserted, a thrust bearing attached to the gearbox and supporting the worm shaft, and a brake wheel fixed to the worm shaft between the gearbox and the motor unit. The bearing replacement assisting tool includes a first restricting member that is held between the brake wheel and the gearbox above the worm shaft and restricts a relative movement of the worm shaft with respect to the gearbox when the operation for pulling the thrust bearing out of the gearbox is being performed. The bearing replacement assisting tool also includes a second restricting member that is held between the brake wheel and the motor unit above the worm shaft and restricts a relative movement of the worm shaft with respect to the motor unit when the operation for attaching the thrust bearing to the gearbox is being performed.

Description

エレベーター用巻上機の軸受取替補助具及び軸受取替方法Elevator hoist bearing replacement aid and bearing replacement method
　本開示は、エレベーター用巻上機の軸受取替作業を補助するための技術に関する。 This disclosure relates to technology to assist in the replacement of bearings in elevator hoists.
　特許文献１には、エレベーター用巻上機に関する技術が開示されている。この技術では、回転子軸に係る荷重を支持台と一方の軸受装置とにより支持させることにより、クレーン等の揚重手段を用いることなく他方の軸受装置を取り外して固定子を引き抜き、電動機等を分解することができるとしている。 Patent Document 1 discloses technology related to elevator hoists. In this technology, the load on the rotor shaft is supported by a support base and one of the bearing devices, so that the other bearing device can be removed and the stator can be pulled out without using a lifting device such as a crane, and the motor and other components can be disassembled.
日本特開平８－８１１６４号公報Japanese Patent Publication No. 8-81164
　エレベーター用のウォーム巻上機の軸受がウォーム軸に固く篏合していることがある。この場合、軸受をウォーム軸から取り外す作業において、ウォーム軸自体が軸受とともに軸方向に移動してしまうおそれがある。これを防止するため、角材等を適当に挟んで対応することが考えられるが、強度及び使い勝手に課題がある。上記特許文献１の技術には、軸受を軸から取り外す際に軸の移動を規制することについて、有効な手段が開示されていない。 The bearings of elevator worm hoists can sometimes be tightly fitted to the worm shaft. In this case, when removing the bearings from the worm shaft, there is a risk that the worm shaft itself will move axially along with the bearings. One way to prevent this is to use a piece of lumber or similar to hold the bearings in place, but this raises issues with strength and ease of use. The technology in Patent Document 1 does not disclose any effective means of restricting movement of the shaft when removing the bearings from the shaft.
　本開示は、上述のような課題を解決するためになされたもので、エレベーター用巻上機の軸受取替作業において、ウォーム軸の軸方向への相対的な移動を規制することのできる軸受取替補助具及び軸受取替方法を提供することを目的とする。 This disclosure has been made to solve the problems described above, and aims to provide a bearing replacement aid and a bearing replacement method that can restrict the relative axial movement of the worm shaft during bearing replacement work for an elevator hoist.
　本開示は、エレベーター用巻上機の軸受取替作業で利用される軸受取替補助具に適用される。巻上機は、モーター部と、一端がモーター部の回転軸に連結されたウォーム軸と、ウォーム軸が挿し通された歯車箱と、歯車箱に取り付けられ、ウォーム軸を支持するスラスト部軸受と、歯車箱とモーター部との間においてウォーム軸に固定されたブレーキホイールと、を含んで構成される。軸受取替補助具は、スラスト部軸受を歯車箱から引き抜く作業時に、ウォーム軸の上方においてブレーキホイールと歯車箱との間に挟まれてウォーム軸の歯車箱に対する相対移動を規制する第一規制部材を備える。 This disclosure applies to a bearing replacement aid used in the work of replacing bearings in elevator hoists. The hoist comprises a motor unit, a worm shaft one end of which is connected to the rotating shaft of the motor unit, a gear box through which the worm shaft is inserted, a thrust bearing attached to the gear box and supporting the worm shaft, and a brake wheel fixed to the worm shaft between the gear box and the motor unit. The bearing replacement aid includes a first stop member that is sandwiched between the brake wheel and the gear box above the worm shaft to stop the worm shaft from moving relative to the gear box when the thrust bearing is pulled out of the gear box.
　また、本開示は、エレベーター用巻上機の軸受取替方法に適用される。巻上機は、モーター部と、一端がモーター部の回転軸に連結されたウォーム軸と、ウォーム軸が挿し通された歯車箱と、歯車箱に取り付けられ、ウォーム軸を支持するスラスト部軸受と、歯車箱とモーター部との間においてウォーム軸に固定されたブレーキホイールと、を含んで構成される。軸受取替方法は、第一規制部材をブレーキホイールと歯車箱との間に設置する工程と、スラスト部軸受をウォーム軸から引き抜く工程と、第一規制部材を巻上機から撤去する工程と、を備える。 The present disclosure also applies to a bearing replacement method for an elevator hoist. The hoist includes a motor unit, a worm shaft one end of which is connected to the rotating shaft of the motor unit, a gear box through which the worm shaft is inserted, a thrust bearing attached to the gear box and supporting the worm shaft, and a brake wheel fixed to the worm shaft between the gear box and the motor unit. The bearing replacement method includes the steps of installing a first stop member between the brake wheel and the gear box, pulling out the thrust bearing from the worm shaft, and removing the first stop member from the hoist.
　また、本開示は、エレベーター用巻上機の軸受取替方法に適用される。巻上機は、モーター部と、一端がモーター部の回転軸に連結されたウォーム軸と、ウォーム軸が挿し通された歯車箱と、歯車箱に取り付けられ、ウォーム軸を支持するスラスト部軸受と、歯車箱とモーター部との間においてウォーム軸に固定されたブレーキホイールと、を含んで構成される。軸受取替方法は、第二規制部材をブレーキホイールとモーター部との間に設置する工程と、スラスト部軸受をウォーム軸へ取り付ける工程と、第二規制部材を巻上機から撤去する工程と、を備える。 The present disclosure also applies to a bearing replacement method for an elevator hoist. The hoist includes a motor unit, a worm shaft one end of which is connected to the rotating shaft of the motor unit, a gear box through which the worm shaft is inserted, a thrust bearing attached to the gear box and supporting the worm shaft, and a brake wheel fixed to the worm shaft between the gear box and the motor unit. The bearing replacement method includes the steps of installing a second stop member between the brake wheel and the motor unit, attaching the thrust bearing to the worm shaft, and removing the second stop member from the hoist.
　本開示の軸受取替補助具によれば、軸受の取替作業時にウォーム軸の軸方向への相対的な移動を規制することができる。その結果、軸受取替作業の作業効率が向上する。 The bearing replacement aid disclosed herein can restrict the relative axial movement of the worm shaft during bearing replacement work. As a result, the work efficiency of bearing replacement work is improved.
実施の形態における軸受取替補助具が適用される巻上機の外観構成を示す図である。1 is a diagram showing the external configuration of a hoist to which a bearing replacement auxiliary tool in an embodiment is applied; 巻上機の歯車箱の周辺の内部構造を示す模式図である。FIG. 2 is a schematic diagram showing the internal structure around the gear box of the hoisting machine. スラスト部軸受の取り外し作業を説明するための模式図である。13 is a schematic diagram for explaining the removal operation of the thrust bearing. FIG. 本実施の形態の巻上機の軸受取替補助具を示す斜視図である。FIG. 2 is a perspective view showing a bearing replacement auxiliary tool for a hoist according to the present embodiment. 第一規制部材の三面図である。4A to 4C are three views of a first stop member. 第二規制部材の三面図である。11A and 11B are three-view diagrams of a second stop member. 巻上機に第一規制部材を配置した様子を示す模式図である。10 is a schematic diagram showing a state in which a first stop member is disposed on a hoisting machine. FIG. 巻上機に第二規制部材を配置した様子を示す模式図である。13 is a schematic diagram showing a state in which a second regulating member is disposed on the hoisting machine. FIG. 第一規制部材を巻上機に設置した状態を示す図である。13 is a diagram showing a state in which the first regulating member is installed on the hoist. FIG. 第一規制部材を巻上機に設置した状態を、歯車箱を透視して歯車箱側からブレーキホイールに向かって見た模式図である。FIG. 11 is a schematic view showing a state in which the first stop member is installed on the hoist, as seen from the gear box side towards the brake wheel with the gear box being see-through. 第二規制部材を巻上機に設置した状態を示す部分拡大図である。FIG. 11 is a partial enlarged view showing a state in which the second regulating member is installed on the hoist. 第二規制部材を巻上機に設置した状態を、モーター部を透視してモーター部側からブレーキホイールに向かって見た模式図である。1 is a schematic diagram showing a state in which a second regulating member is installed on a hoist, as seen from the motor unit side toward the brake wheel with the motor unit being transparent. FIG.
　以下、図面を参照して実施の形態について説明する。なお、各図において共通する要素には、同一の符号を付して、重複する説明を省略する。 Below, the embodiments will be explained with reference to the drawings. Note that elements common to each drawing will be given the same reference numerals, and duplicate explanations will be omitted.
実施の形態．
１．実施の形態における軸受取替補助具が適用される巻上機の外観構成
　図１は、実施の形態における軸受取替補助具が適用される巻上機の外観構成を示す図である。図２は、巻上機の歯車箱の周辺の内部構造を示す模式図である。巻上機１０は、エレベーター用のウォーム巻上機である。巻上機１０は、エレベーターの機械室に設置される。 Embodiment
1. External configuration of a hoist to which a bearing replacement auxiliary tool according to an embodiment is applied Fig. 1 is a diagram showing the external configuration of a hoist to which a bearing replacement auxiliary tool according to an embodiment is applied. Fig. 2 is a schematic diagram showing the internal structure around a gear box of the hoist. The hoist 10 is a worm hoist for an elevator. The hoist 10 is installed in the machine room of the elevator.
　巻上機１０は、軸受の取替作業に関連する主要な構成として、歯車箱１２と、モーター部１４と、ブレーキホイール１６と、巻上げシーブ１７と、ウォーム軸２０と、を備える。なお、巻上機１０は、これらの構成以外にも種々の構成を備えているが、それらの説明は省略する。 The hoist 10 is equipped with a gear box 12, a motor unit 14, a brake wheel 16, a hoisting sheave 17, and a worm shaft 20 as the main components related to the bearing replacement work. Note that the hoist 10 is equipped with various other components in addition to these components, but the description of these will be omitted.
　歯車箱１２は、巻上機１０の構造体の一部を構成する。歯車箱１２には、スラスト部軸受孔１２１と、グランド部軸受孔１２２とが、向かい合う位置に形成されている。以下の説明では、歯車箱１２において、グランド部軸受孔１２２が形成されている側を「グランド側」と称し、スラスト部軸受孔１２１が形成されている側を「スラスト側」と称する。 The gear box 12 constitutes part of the structure of the hoist 10. The gear box 12 has a thrust bearing hole 121 and a ground bearing hole 122 formed in opposing positions. In the following description, the side of the gear box 12 on which the ground bearing hole 122 is formed is referred to as the "ground side," and the side on which the thrust bearing hole 121 is formed is referred to as the "thrust side."
　歯車箱１２は、スラスト部軸受２４が収納される軸受箱２２を含む。軸受箱２２は、内部にスラスト部軸受２４が収納された状態で、スラスト部軸受孔１２１に嵌め込まれている。軸受箱２２の開口部には、軸受カバー１８がカバーボルト１９によって取り付けられている。グランド部軸受孔１２２には、グランド部軸受２６が嵌め込まれている。 The gear box 12 includes a bearing box 22 in which the thrust bearing 24 is housed. The bearing box 22 is fitted into the thrust bearing hole 121 with the thrust bearing 24 housed inside. A bearing cover 18 is attached to the opening of the bearing box 22 by a cover bolt 19. A gland bearing 26 is fitted into the gland bearing hole 122.
　ウォーム軸２０は、歯車箱１２のグランド側からスラスト側に向かって挿し通され、スラスト部軸受２４とグランド部軸受２６によって支持される。ウォーム軸２０のウォームギア２０２は、歯車箱１２内の図示しないリンクギアに螺合している。リンクギアは、ウォーム軸２０の回転力を巻上げシーブ１７に伝達する。以下の説明では、ウォーム軸２０の軸方向のうち、グランド側からスラスト側へ向かう方向を「スラスト方向」と称し、スラスト側からグランド側へ向かう方向を「グランド方向」と称する。 The worm shaft 20 is inserted from the ground side to the thrust side of the gear box 12 and is supported by the thrust bearing 24 and the ground bearing 26. The worm gear 202 of the worm shaft 20 is screwed into a link gear (not shown) inside the gear box 12. The link gear transmits the rotational force of the worm shaft 20 to the winding sheave 17. In the following explanation, the axial direction of the worm shaft 20 from the ground side to the thrust side is referred to as the "thrust direction", and the direction from the thrust side to the ground side is referred to as the "ground direction".
　モーター部１４は、巻上機１０の構造体にボルトによって着脱自在に設置されている。ウォーム軸２０のグランド側の端部は、モーター部１４の回転軸に連結されている。モーター部１４の回転軸か回転されると、これに伴ってウォーム軸２０が回転される。 The motor unit 14 is detachably attached to the structure of the hoist 10 with bolts. The ground side end of the worm shaft 20 is connected to the rotating shaft of the motor unit 14. When the rotating shaft of the motor unit 14 rotates, the worm shaft 20 rotates accordingly.
　ブレーキホイール１６は、ブレーキ機構の一部品であり、ウォーム軸２０とともに回転するように固定される部品である。ブレーキホイール１６は、ウォーム軸２０における歯車箱１２とモーター部１４との間に配置される。 The brake wheel 16 is a part of the brake mechanism and is fixed so as to rotate together with the worm shaft 20. The brake wheel 16 is disposed between the gear box 12 and the motor section 14 on the worm shaft 20.
２．実施の形態における軸受取替補助具の特徴
　巻上機１０は、スラスト部軸受２４及びグランド部軸受２６を取り替えることがある。図３は、スラスト部軸受の取り外し作業を説明するための模式図である。スラスト部軸受２４を取り外す場合、先ず、作業員は、カバーボルト１９を外して軸受カバー１８を取り外す。そして、準備した２本のジャッキボルト２８を軸受箱２２のネジ穴にそれぞれ螺合させて均等に締め付ける。これにより、軸受箱２２がスラスト部軸受２４とともにスラスト部軸受孔１２１からウォーム軸２０のスラスト方向に徐々に引き出される。 2. Features of the bearing replacement aid in the embodiment The hoist 10 may require replacement of the thrust bearing 24 and the gland bearing 26. Fig. 3 is a schematic diagram for explaining the removal of the thrust bearing. When removing the thrust bearing 24, an operator first removes the cover bolt 19 and removes the bearing cover 18. Then, two prepared jack bolts 28 are screwed into the threaded holes of the bearing housing 22 and tightened evenly. As a result, the bearing housing 22 together with the thrust bearing 24 is gradually pulled out of the thrust bearing hole 121 in the thrust direction of the worm shaft 20.
　ここで、スラスト部軸受２４はウォーム軸２０に固く篏合している。このため、スラスト部軸受２４がスラスト方向に引き出されると、それに伴いウォーム軸２０もスラスト方向に引っ張られてしまうことがある。このような問題を解決すべく、軸受箱２２の引き出し作業時に、例えば、歯車箱１２のグランド側の壁面とブレーキホイール１６の壁面との間に木材等の適当な角材を挟んでブレーキホイール１６の歯車箱１２に対する相対移動を規制することが考えられる。しかしながら、木材等の角材は、強度及び使い勝手に課題がある。 Here, the thrust bearing 24 is tightly engaged with the worm shaft 20. For this reason, when the thrust bearing 24 is pulled out in the thrust direction, the worm shaft 20 may also be pulled in the thrust direction. To solve this problem, it is possible to restrict the relative movement of the brake wheel 16 with respect to the gear box 12 by, for example, sandwiching a suitable block of wood or other material between the ground side wall of the gear box 12 and the wall of the brake wheel 16 when pulling out the bearing box 22. However, blocks of wood or other material have problems with strength and ease of use.
　本実施の形態の軸受取替補助具は、このようなスラスト部軸受２４の取替作業時に、ウォーム軸２０の歯車箱１２に対する相対移動を規制するための補助具である。図４は、本実施の形態の巻上機の軸受取替補助具を示す斜視図である。軸受取替補助具は、第一規制部材３０と、第二規制部材４０と、を含む。図５は、第一規制部材の三面図である。図６は、第二規制部材の三面図である。 The bearing replacement aid of this embodiment is an aid for restricting the relative movement of the worm shaft 20 with respect to the gear box 12 during the replacement work of the thrust bearing 24. FIG. 4 is a perspective view showing the bearing replacement aid of the hoist of this embodiment. The bearing replacement aid includes a first stop member 30 and a second stop member 40. FIG. 5 is a three-sided view of the first stop member. FIG. 6 is a three-sided view of the second stop member.
　第一規制部材３０は、ウォーム軸２０の上方においてブレーキホイール１６と歯車箱１２のグランド側との間に挟まれて使用される補助具である。第一規制部材３０は、第一平面部３０２と、第二平面部３０４と、を有する。第一平面部３０２及び第二平面部３０４は、何れも矩形形状を呈し、長手方向に直交する断面が山型になるように、長手方向の一方の辺が互いに接続されている。第一平面部３０２と第二平面部３０４のなす角度に限定はない。典型的には、第一規制部材３０は、長手方向に直交する断面において、第一平面部３０２と第二平面部３０４のなす角度が直角となるように２平面が接続されている。第一規制部材３０は、例えばＬ３×３０×３０ｍｍのＬ型アングル材を利用することができる。 The first stop member 30 is an auxiliary tool that is used by being sandwiched between the brake wheel 16 and the ground side of the gear box 12 above the worm shaft 20. The first stop member 30 has a first planar portion 302 and a second planar portion 304. The first planar portion 302 and the second planar portion 304 are both rectangular in shape, and one of the longitudinal sides is connected to each other so that the cross section perpendicular to the longitudinal direction is mountain-shaped. There is no limitation on the angle between the first planar portion 302 and the second planar portion 304. Typically, the first stop member 30 has two planes connected so that the angle between the first planar portion 302 and the second planar portion 304 is a right angle in the cross section perpendicular to the longitudinal direction. The first stop member 30 can be, for example, an L-shaped angle bar of L3 x 30 x 30 mm.
　第一規制部材３０の長手方向の全長は、巻上機１０の歯車箱１２とブレーキホイール１６との位置関係を考慮して設定される。図７は、巻上機に第一規制部材を配置した様子を示す模式図である。この図に示すように、第一規制部材３０は、ウォーム軸２０の上方において、巻上機１０の歯車箱１２のグランド側とブレーキホイール１６との間に長手方向が収まる全長に設定される。典型的には、第一規制部材３０の長手方向の全長は、歯車箱１２のグランド側の側面部１２３と、当該側面部に面するブレーキホイール１６の側面部１６１との間の距離よりも若干短い長さに設定されている。第一規制部材３０の長手方向の全長は、例えば７０ｍｍである。 The total length of the first stop member 30 in the longitudinal direction is set taking into consideration the positional relationship between the gear box 12 and the brake wheel 16 of the hoist 10. FIG. 7 is a schematic diagram showing the arrangement of the first stop member on the hoist. As shown in this figure, the first stop member 30 is set to a total length that fits in the longitudinal direction between the ground side of the gear box 12 of the hoist 10 and the brake wheel 16 above the worm shaft 20. Typically, the total length of the first stop member 30 in the longitudinal direction is set to a length slightly shorter than the distance between the side portion 123 on the ground side of the gear box 12 and the side portion 161 of the brake wheel 16 facing said side portion. The total length of the first stop member 30 in the longitudinal direction is, for example, 70 mm.
　第一規制部材３０は、第一平面部３０２の縁側の両角部に、第一面取加工部３０６を有している。同様に、第一規制部材３０は、第二平面部３０４の縁側の両角部に、第一面取加工部３０６を有している。第一面取加工部３０６の形状及び大きさに限定はない。ここでは、第一平面部３０２及び第二平面部３０４の短手方向の長さの約１／３の範囲に第一面取加工部３０６が形成されている。第一規制部材３０が、例えばＬ３×３０×３０のＬ型アングル材の場合、第一面取加工部３０６は一辺１０ｍｍである。 The first stop member 30 has a first chamfered portion 306 at both corners on the edge side of the first flat surface portion 302. Similarly, the first stop member 30 has a first chamfered portion 306 at both corners on the edge side of the second flat surface portion 304. There are no limitations on the shape and size of the first chamfered portion 306. Here, the first chamfered portion 306 is formed over a range of approximately 1/3 of the short-side length of the first flat surface portion 302 and the second flat surface portion 304. If the first stop member 30 is an L-shaped angle bar, for example, L3 x 30 x 30, the first chamfered portion 306 has a side of 10 mm.
　第一平面部３０２には、「グランド側」を記載されたラベル部３０８が付されている。ラベル部３０８の形状、大きさ、及び色彩に限定はない。ラベル部３０８は、第一平面部３０２の全面を覆っていてもよい。ラベル部３０８の色彩は、蛍光色等の視認し易い色が好ましい。また、第一規制部材３０において、ラベル部３０８の構成は必須ではない。 A label portion 308 with the words "Ground Side" written on it is attached to the first flat portion 302. There are no limitations on the shape, size, or color of the label portion 308. The label portion 308 may cover the entire surface of the first flat portion 302. The color of the label portion 308 is preferably a highly visible color such as a fluorescent color. Furthermore, the configuration of the label portion 308 is not essential to the first stop member 30.
　第二規制部材４０は、ウォーム軸２０の上方においてブレーキホイール１６とモーター部１４との間に挟まれて使用される補助具である。第二規制部材４０の構造は、例えば、長手方向の全長を除き第一規制部材３０と同様の構造を採用することができる。具体的には、第二規制部材４０は、第一平面部４０２と、第二平面部４０４と、を有する。第一平面部４０２及び第二平面部４０４は、何れも矩形形状を呈し、長手方向に直交する断面が山型になるように、長手方向の一方の辺が互いに接続されている。第一平面部４０２と第二平面部４０４のなす角度に限定はない。典型的には、第二規制部材４０は、長手方向に直交する断面において、第一平面部４０２と第二平面部４０４のなす角度が直角となるように２平面が接続されている。第二規制部材４０は、例えばＬ３×３０×３０ｍｍのＬ型アングル材を利用することができる。 The second stop member 40 is an auxiliary tool that is used by being sandwiched between the brake wheel 16 and the motor unit 14 above the worm shaft 20. The structure of the second stop member 40 can be the same as that of the first stop member 30, except for the overall length in the longitudinal direction. Specifically, the second stop member 40 has a first planar portion 402 and a second planar portion 404. The first planar portion 402 and the second planar portion 404 are both rectangular in shape, and one side in the longitudinal direction is connected to each other so that the cross section perpendicular to the longitudinal direction is mountain-shaped. There is no limitation on the angle between the first planar portion 402 and the second planar portion 404. Typically, the second stop member 40 has two planes connected so that the angle between the first planar portion 402 and the second planar portion 404 is a right angle in the cross section perpendicular to the longitudinal direction. For example, an L-shaped angle bar of L3 x 30 x 30 mm can be used for the second stop member 40.
　第二規制部材４０の長手方向の全長は、巻上機１０のモーター部１４とブレーキホイール１６との位置関係を考慮して設定される。図８は、巻上機に第二規制部材を配置した様子を示す模式図である。この図に示すように、ブレーキホイール１６は、ウォーム軸２０が固定されている中心部において、ウォーム軸２０のグランド方向に円柱状に突出した突出部１６３を有している。第二規制部材４０の長手方向の全長は、モーター部１４のブレーキホイール１６側の側面部１４２と、当該側面部１４２に面する突出部１６３の側面部１６４との間の距離よりも若干短い長さに設定されている。第二規制部材４０の長手方向の全長は、例えば８０ｍｍである。 The total length of the second regulating member 40 in the longitudinal direction is set taking into consideration the positional relationship between the motor unit 14 and the brake wheel 16 of the hoist 10. FIG. 8 is a schematic diagram showing the arrangement of the second regulating member on the hoist. As shown in this figure, the brake wheel 16 has a cylindrical protrusion 163 protruding in the ground direction of the worm shaft 20 at the center where the worm shaft 20 is fixed. The total length of the second regulating member 40 in the longitudinal direction is set to a length slightly shorter than the distance between the side surface 142 on the brake wheel 16 side of the motor unit 14 and the side surface 164 of the protrusion 163 facing the side surface 142. The total length of the second regulating member 40 in the longitudinal direction is, for example, 80 mm.
　第二規制部材４０は、第一平面部４０２の縁側の両角部に、第二面取加工部４０６を有している。同様に、第二規制部材４０は、第二平面部４０４の縁側の両角部に、第二面取加工部４０６を有している。第二面取加工部４０６の大きさに限定はない。ここでは、第一平面部４０２及び第二平面部４０４の短手方向の長さの約１／３の範囲に第二面取加工部４０６が形成されている。第二規制部材４０が、例えばＬ３×３０×３０のＬ型アングル材の場合、第二面取加工部４０６は一辺１０ｍｍである。 The second restricting member 40 has second chamfered portions 406 at both corners on the edge side of the first flat surface portion 402. Similarly, the second restricting member 40 has second chamfered portions 406 at both corners on the edge side of the second flat surface portion 404. There is no limitation on the size of the second chamfered portions 406. Here, the second chamfered portions 406 are formed in a range of approximately 1/3 of the short-side length of the first flat surface portion 402 and the second flat surface portion 404. If the second restricting member 40 is an L-shaped angle bar of, for example, L3 x 30 x 30, the second chamfered portions 406 have a side length of 10 mm.
　第一平面部４０２には、「モーター側」を記載されたラベル部４０８が付されている。ラベル部４０８の形状、大きさ、及び色彩に限定はない。ラベル部４０８は、第一平面部４０２の全面を覆っていてもよい。ラベル部４０８の色彩は、蛍光色等の視認し易い色が好ましい。また、第二規制部材４０において、ラベル部４０８の構成は必須ではない。 A label portion 408 with "Motor Side" written on it is attached to the first flat portion 402. There are no limitations on the shape, size, or color of the label portion 408. The label portion 408 may cover the entire surface of the first flat portion 402. The color of the label portion 408 is preferably a highly visible color such as a fluorescent color. Furthermore, the configuration of the label portion 408 is not essential to the second restricting member 40.
３．軸受取替補助具を用いた軸受の取替作業手順
　次に、実施の形態の軸受取替補助具を用いたスラスト部軸受２４の取外し方法及び取付け方法について詳細に説明する。なお、スラスト部軸受２４の取外し方法及び取付け方法は、以下に示す工程の他にも種々の工程が存在するが、ここでは説明を省略する。 3. Procedure for replacing bearings using a bearing replacement aid Next, a detailed description will be given of a method for removing and installing the thrust bearing 24 using the bearing replacement aid of the embodiment. Note that the method for removing and installing the thrust bearing 24 includes various steps in addition to those described below, but the description will be omitted here.
　準備工程：軸受カバーの取り外し工程
　作業員は、カバーボルト１９を取り外して軸受カバー１８を取り外す。これにより、軸受箱の内部に嵌め込まれているスラスト部軸受２４が露出する。 Preparation Process: Bearing Cover Removal Process The worker removes the bearing cover 18 by removing the cover bolts 19. This exposes the thrust bearing 24 fitted inside the bearing housing.
　第一工程：第一規制部材の設置工程
　作業員は、第一規制部材３０を巻上機１０に設置する。図９は、第一規制部材を巻上機に設置した状態を示す図である。図１０は、第一規制部材を巻上機に設置した状態を、歯車箱を透視して歯車箱側からブレーキホイールに向かって見た模式図である。 First step: Step of installing the first stop member An operator installs the first stop member 30 on the hoist 10. Fig. 9 is a diagram showing a state in which the first stop member is installed on the hoist. Fig. 10 is a schematic diagram showing a state in which the first stop member is installed on the hoist, seen from the gear box side toward the brake wheel with the gear box seen through.
　これらの図に示すように、ブレーキホイール１６は、ウォーム軸２０が固定されている中心部において、スラスト方向に円柱状に突出した突出部１６２を有している。第一規制部材３０は、長手方向をウォーム軸２０の軸方向に合わせて上に凸となる向きでブレーキホイール１６の突出部１６２の上部に配置される。これにより、ブレーキホイール１６及びこれに固定されているウォーム軸２０の、歯車箱１２に対するスラスト方向への相対移動が規制される。 As shown in these figures, the brake wheel 16 has a cylindrical protrusion 162 that protrudes in the thrust direction at the center where the worm shaft 20 is fixed. The first stop member 30 is arranged on top of the protrusion 162 of the brake wheel 16 with its longitudinal direction aligned with the axial direction of the worm shaft 20 and oriented so as to be convex upward. This restricts the relative movement of the brake wheel 16 and the worm shaft 20 fixed thereto in the thrust direction with respect to the gear box 12.
　第二工程：スラスト部軸受２４の取外し工程
　作業員は、準備した２本のジャッキボルト２８を軸受箱２２のネジ穴にそれぞれ螺合させて均等に締め付ける。ウォーム軸２０は、第一規制部材３０によって歯車箱１２に対するスラスト方向への相対移動が規制されている。このため、軸受箱２２は、ウォーム軸２０を残してスラスト部軸受孔１２１からスラスト方向に徐々に引き出される。その結果、軸受箱２２の内部に嵌め込まれていたスラスト部軸受２４は、ウォーム軸２０から引き抜かれる。 Second step: Removal step of thrust bearing 24 An operator screws two prepared jack bolts 28 into the screw holes of the bearing box 22 and tightens them evenly. The worm shaft 20 is restricted in its relative movement in the thrust direction with respect to the gear box 12 by the first stop member 30. Therefore, the bearing box 22 is gradually pulled out in the thrust direction from the thrust bearing hole 121, leaving the worm shaft 20 behind. As a result, the thrust bearing 24 fitted inside the bearing box 22 is pulled out from the worm shaft 20.
　第三工程：第一規制部材３０の撤去工程
　スラスト部軸受２４がウォーム軸２０から引き抜かれると、作業員は、配置されていた第一規制部材３０を撤去する。 Third Step: Removing the First Stop Member 30 After the thrust bearing 24 has been pulled out from the worm shaft 20, the worker removes the first stop member 30 that has been placed therein.
　第四工程：軸受取替補助具の設置工程
　作業員は、スラスト部軸受２４の取付け工程のための準備工程として、第二規制部材４０を巻上機１０に設置する。図１１は、第二規制部材を巻上機に設置した状態を示す部分拡大図である。図１２は、第二規制部材を巻上機に設置した状態を、モーター部を透視してモーター部側からブレーキホイールに向かって見た模式図である。 Fourth step: Installation step of bearing replacement auxiliary tool An operator installs the second regulating member 40 on the hoist 10 as a preparation step for the installation step of the thrust bearing 24. Fig. 11 is a partially enlarged view showing the state in which the second regulating member is installed on the hoist. Fig. 12 is a schematic view showing the state in which the second regulating member is installed on the hoist, seen from the motor unit side toward the brake wheel with the motor unit seen through.
　これらの図に示すように、第二規制部材４０は、長手方向をウォーム軸２０の軸方向に合わせた上で、ブレーキホイール１６の突出部１６３の側面部１６４とモーター部１４の側面部１４２との間において上に凸となる向きで配置される。これにより、ブレーキホイール１６及びこれに固定されているウォーム軸２０の、モーター部１４及び歯車箱１２に対するグランド方向への相対移動が規制される。 As shown in these figures, the second stop member 40 is arranged with its longitudinal direction aligned with the axial direction of the worm shaft 20, and is disposed between the side surface 164 of the protruding portion 163 of the brake wheel 16 and the side surface 142 of the motor unit 14 in an upwardly convex orientation. This restricts the relative movement of the brake wheel 16 and the worm shaft 20 fixed thereto in the ground direction with respect to the motor unit 14 and the gear box 12.
　第五工程：スラスト部軸受２４の取付け工程
　作業員は、軸受箱２２をスラスト部軸受孔１２１に取り付ける。そして、作業員は、新たなスラスト部軸受２４に公知の加熱・冷却処理を施した後、スラスト部軸受２４をウォーム軸２０にはめ合わせ、軸受箱２２内に挿入する。ウォーム軸２０は、第二規制部材４０によって歯車箱１２に対するグランド方向への相対移動が規制されている。このため、スラスト部軸受２４は、ウォーム軸２０を残して軸受箱２２の奥まで嵌め込まれる。その結果、スラスト部軸受２４は、ウォーム軸２０に取付けられる。 Fifth step: Mounting step of thrust bearing 24 An operator mounts the bearing box 22 in the thrust bearing hole 121. Then, the operator subjects a new thrust bearing 24 to a known heating and cooling treatment, and then fits the thrust bearing 24 onto the worm shaft 20 and inserts it into the bearing box 22. The worm shaft 20 is restricted in its relative movement in the ground direction with respect to the gear box 12 by the second restricting member 40. Therefore, the thrust bearing 24 is fitted deep into the bearing box 22, leaving the worm shaft 20 behind. As a result, the thrust bearing 24 is mounted to the worm shaft 20.
４．軸受取替補助具の作用及び効果
　以上のような軸受取替補助具によれば、以下の作用及び効果が得られる。 4. Function and Effects of the Bearing Replacement Aid The bearing replacement aid described above provides the following functions and effects.
　第一規制部材３０は、スラスト部軸受２４を歯車箱１２から引き抜く作業時に、ウォーム軸２０の上方においてブレーキホイール１６と歯車箱１２との間に挟まれてウォーム軸２０の歯車箱１２に対する相対移動を規制することができる。これにより、スラスト部軸受２４を歯車箱１２から引き抜く作業の作業効率が向上する。 When the thrust bearing 24 is being pulled out from the gear box 12, the first stop member 30 is sandwiched between the brake wheel 16 and the gear box 12 above the worm shaft 20, and can restrict the relative movement of the worm shaft 20 with respect to the gear box 12. This improves the efficiency of the work of pulling out the thrust bearing 24 from the gear box 12.
　第一規制部材３０は、巻上機１０に設置された状態において、長手方向に直交する断面が上方に凸となる山型になるように第一平面部３０２と第二平面部３０４とが接続されている。このような構成によれば、第一規制部材３０をウォーム軸２０の上側に安定して設置することができる。 When the first stop member 30 is installed on the hoist 10, the first flat portion 302 and the second flat portion 304 are connected so that the cross section perpendicular to the longitudinal direction has an upwardly convex mountain shape. With this configuration, the first stop member 30 can be stably installed above the worm shaft 20.
　第一規制部材３０は、長手方向に直交する断面において、第一平面部３０２と第二平面部３０４の成す角が直角になるように構成されている。このような構成によれば、汎用のＬ型のアングル材を利用して第一規制部材３０を形成することができるので、第一規制部材３０の制作が容易になる。また、第一規制部材３０は、長手方向に圧縮される際の抵抗材としての強度が確保される。 The first stop member 30 is configured so that the angle between the first planar portion 302 and the second planar portion 304 is a right angle in a cross section perpendicular to the longitudinal direction. With this configuration, the first stop member 30 can be formed using a general-purpose L-shaped angle bar, making it easy to manufacture the first stop member 30. In addition, the first stop member 30 has sufficient strength to act as a resistance material when compressed in the longitudinal direction.
　第一規制部材３０は、第一平面部３０２と第二平面部３０４の角部に第一面取加工部３０６を有している。このような構成によれば、第一規制部材３０を巻上機１０の狭小部に設置する際に角部の引っ掛かりを防ぐことができるので、設置が容易になるとともに、巻上機１０を傷つけることを防止することができる。また、第一面取加工部３０６は、第一規制部材３０を取り扱う作業員の怪我防止にも寄与する。 The first stop member 30 has a first chamfered portion 306 at the corner of the first flat portion 302 and the second flat portion 304. This configuration makes it possible to prevent the corner from getting caught when the first stop member 30 is installed in a narrow portion of the hoist 10, making installation easier and preventing damage to the hoist 10. The first chamfered portion 306 also contributes to preventing injury to workers handling the first stop member 30.
　第二規制部材４０は、スラスト部軸受２４を歯車箱１２へ取り付ける作業時に、ウォーム軸２０の上方においてブレーキホイール１６とモーター部１４との間に挟まれてウォーム軸２０のモーター部１４に対する相対移動を規制することができる。これにより、スラスト部軸受２４を歯車箱１２へ取り付ける作業の作業効率が向上する。 When the thrust bearing 24 is attached to the gear box 12, the second restricting member 40 is sandwiched between the brake wheel 16 and the motor unit 14 above the worm shaft 20, and restricts the relative movement of the worm shaft 20 with respect to the motor unit 14. This improves the efficiency of the work of attaching the thrust bearing 24 to the gear box 12.
　第二規制部材４０は、巻上機１０に設置された状態において、長手方向に直交する断面が上方に凸となる山型になるように第一平面部４０２と第二平面部４０４とが接続されている。このような構成によれば、第二規制部材４０をウォーム軸２０の上側に安定して設置することができる。 When the second regulating member 40 is installed on the hoist 10, the first flat portion 402 and the second flat portion 404 are connected so that the cross section perpendicular to the longitudinal direction has an upwardly convex mountain shape. With this configuration, the second regulating member 40 can be stably installed above the worm shaft 20.
　第二規制部材４０は、長手方向に直交する断面において、第一平面部４０２と第二平面部４０４の成す角が直角になるように構成されている。このような構成によれば、汎用のＬ型のアングル材を利用して第二規制部材４０を形成することができるので、第二規制部材４０の制作が容易になる。また、第二規制部材４０は、長手方向に圧縮される際の抵抗材としての強度が確保される。 The second stop member 40 is configured so that the angle between the first planar portion 402 and the second planar portion 404 is a right angle in a cross section perpendicular to the longitudinal direction. With this configuration, the second stop member 40 can be formed using a general-purpose L-shaped angle bar, making it easy to manufacture the second stop member 40. In addition, the second stop member 40 has sufficient strength to act as a resistance material when compressed in the longitudinal direction.
　第二規制部材４０は、第一平面部４０２と第二平面部４０４のそれぞれの両角部に第二面取加工部４０６を有している。このような構成によれば、第二規制部材４０を巻上機１０の狭小部に設置する際に角部の引っ掛かりを防ぐことができるので、設置が容易になるとともに、巻上機１０を傷つけることを防止することができる。また、第二面取加工部４０６は、第二規制部材４０を取り扱う作業員の怪我防止にも寄与する。 The second regulating member 40 has second chamfered portions 406 at both corners of the first flat portion 402 and the second flat portion 404. This configuration makes it possible to prevent the corners from getting caught when the second regulating member 40 is installed in a narrow section of the hoist 10, making installation easier and preventing damage to the hoist 10. The second chamfered portions 406 also contribute to preventing injury to workers handling the second regulating member 40.
５．変形例
　本実施の形態の軸受取替補助具は、以下のような変形した態様を採用してもよい。 5. Modifications The bearing replacement aid of this embodiment may employ the following modifications.
　軸受取替補助具は、第一規制部材３０及び第二規制部材４０の何れか一方のみを備える構成でもよい。 The bearing replacement aid may be configured to include only one of the first stop member 30 and the second stop member 40.
　第一規制部材３０は、歯車箱１２のグランド側の側面部１２３と、当該側面部１２３と向き合う突出部１６２の端面部との間に設置可能な全長に設定し、ウォーム軸２０に当接するように配置してもよい。 The first stop member 30 may be set to a length that allows it to be installed between the side surface 123 on the ground side of the gear box 12 and the end surface of the protrusion 162 that faces the side surface 123, and may be positioned so that it abuts against the worm shaft 20.
　第二規制部材４０は、長手方向をウォーム軸２０の軸方向に合わせて上に凸となる向きでブレーキホイール１６の突出部１６３の上部に配置してもよい。この場合、第二規制部材４０の長手方向の全長は、モーター部１４のブレーキホイール１６側の側面部１４２と、当該側面部１４２に面するブレーキホイール１６の側面部との間の距離よりも若干短い長さになるように設定すればよい。 The second stop member 40 may be disposed on the upper portion of the protruding portion 163 of the brake wheel 16 with its longitudinal direction aligned with the axial direction of the worm shaft 20 and convex upward. In this case, the total longitudinal length of the second stop member 40 may be set to be slightly shorter than the distance between the side portion 142 of the motor unit 14 on the brake wheel 16 side and the side portion of the brake wheel 16 facing the side portion 142.
　１０　巻上機、　１２　歯車箱、　１４　モーター部、　１６　ブレーキホイール、１７　シーブ、　１８　軸受カバー、　１９　カバーボルト、　２０　ウォーム軸、　２２　軸受箱、　２４　スラスト部軸受、　２６　グランド部軸受、　２８　ジャッキボルト、
３０　第一規制部材、　４０　第二規制部材、　１２１　スラスト部軸受孔、　１２２　グランド部軸受孔、　１２３　側面部、　１４２　側面部、　１６１　側面部、　１６３　突出部、　１６４　側面部、　２０２　ウォームギア、　３０２　第一平面部、　３０４　第二平面部、　３０６　第一面取加工部、　３０８　ラベル部、　４０２　第一平面部、　４０４　第二平面部、　４０６　第二面取加工部、　４０８　ラベル部 REFERENCE SIGNS LIST 10 hoist, 12 gear box, 14 motor section, 16 brake wheel, 17 sheave, 18 bearing cover, 19 cover bolt, 20 worm shaft, 22 bearing box, 24 thrust bearing, 26 gland bearing, 28 jack bolt,
30 First stop member, 40 Second stop member, 121 Thrust portion bearing hole, 122 Gland portion bearing hole, 123 Side portion, 142 Side portion, 161 Side portion, 163 Protrusion, 164 Side portion, 202 Worm gear, 302 First flat portion, 304 Second flat portion, 306 First chamfered portion, 308 Label portion, 402 First flat portion, 404 Second flat portion, 406 Second chamfered portion, 408 Label portion

Claims (10)

  1. 　エレベーター用巻上機の軸受取替作業で利用される軸受取替補助具であって、
    　前記巻上機は、
    　モーター部と、
    　一端が前記モーター部の回転軸に連結されたウォーム軸と、
    　前記ウォーム軸が挿し通された歯車箱と、
    　前記歯車箱に取り付けられ、前記ウォーム軸を支持するスラスト部軸受と、
    　前記歯車箱と前記モーター部との間において前記ウォーム軸に固定されたブレーキホイールと、を含んで構成され、
    　前記軸受取替補助具は、
    　前記スラスト部軸受を前記歯車箱から引き抜く作業時に、
    　前記ウォーム軸の上方において前記ブレーキホイールと前記歯車箱との間に挟まれて前記ウォーム軸の前記歯車箱に対する相対移動を規制する第一規制部材を備える
    　エレベーター用巻上機の軸受取替補助具。     A bearing replacement aid used in the bearing replacement work of an elevator hoist,
    The hoisting machine includes:
    The motor section,
    A worm shaft having one end connected to a rotating shaft of the motor unit;
    a gear box through which the worm shaft is inserted;
    a thrust bearing attached to the gear box and supporting the worm shaft;
    a brake wheel fixed to the worm shaft between the gear box and the motor unit,
    The bearing replacement aid includes:
    When the thrust bearing is pulled out from the gear box,
    a first restricting member that is sandwiched between the brake wheel and the gear box above the worm shaft to restrict relative movement of the worm shaft with respect to the gear box.
  2. 　前記第一規制部材は、
    　前記巻上機に配置された状態において、長手方向に直交する断面が上方に凸となる山型になるように２平面が接続された形状を有する
    　請求項１に記載のエレベーター用巻上機の軸受取替補助具。     The first stop member is
    2. The bearing replacement auxiliary tool for an elevator hoist machine according to claim 1, wherein, when the auxiliary tool is placed in the hoist machine, the auxiliary tool has a shape in which two planes are connected so that a cross section perpendicular to the longitudinal direction has an upwardly convex mountain shape.
  3. 　前記第一規制部材は、
    　長手方向に直交する断面において、前記第一規制部材の２平面の成す角が直角になるように前記２平面が接続されている
    　請求項２に記載のエレベーター用巻上機の軸受取替補助具。     The first stop member is
    The bearing replacement auxiliary device for an elevator hoist according to claim 2, wherein the two planes of the first stop member are connected so that the angle between the two planes is a right angle in a cross section perpendicular to the longitudinal direction.
  4. 　前記第一規制部材は、前記第一規制部材の前記２平面のそれぞれの角部に第一面取加工部を有する
    　請求項２又は請求項３に記載のエレベーター用巻上機の軸受取替補助具。     The bearing replacement auxiliary device for an elevator hoist according to claim 2 or 3, wherein the first stop member has a first chamfered portion at each corner of the two flat surfaces of the first stop member.
  5. 　前記軸受取替補助具は、
    　前記スラスト部軸受を前記歯車箱に取り付ける作業時に、
    　前記ウォーム軸の上方において前記ブレーキホイールと前記モーター部との間に挟まれて前記ウォーム軸の前記モーター部に対する相対移動を規制する第二規制部材を備える
    　請求項１から請求項４の何れか１項に記載のエレベーター用巻上機の軸受取替補助具。     The bearing replacement aid includes:
    When the thrust bearing is attached to the gear box,
    5. The bearing replacement auxiliary tool for an elevator hoist machine according to claim 1, further comprising a second restricting member that is sandwiched between the brake wheel and the motor unit above the worm shaft to restrict relative movement of the worm shaft with respect to the motor unit.
  6. 　前記第二規制部材は、
    　前記巻上機に配置された状態において、長手方向に直交する断面が上方に凸となる山型になるように２平面が接続された形状を有する
    　請求項５に記載のエレベーター用巻上機の軸受取替補助具。     The second stop member is
    The bearing replacement auxiliary tool for an elevator hoist machine according to claim 5, wherein, when the auxiliary tool is placed in the hoist machine, the auxiliary tool has a shape in which two planes are connected so that a cross section perpendicular to the longitudinal direction has an upwardly convex mountain shape.
  7. 　前記第二規制部材は、
    　長手方向に直交する断面において、前記第二規制部材の２平面の成す角が直角になるように接続されている
    　請求項６に記載のエレベーター用巻上機の軸受取替補助具。     The second stop member is
    The bearing replacement auxiliary device for an elevator hoisting machine according to claim 6, wherein the second control member is connected so that the angle formed by the two planes of the second control member is a right angle in a cross section perpendicular to the longitudinal direction.
  8. 　前記第二規制部材は、前記第二規制部材の２平面のそれぞれの角部に第二面取加工部を有する
    　請求項６又は請求項７に記載のエレベーター用巻上機の軸受取替補助具。
     The bearing replacement auxiliary tool for an elevator hoist machine according to claim 6 or 7, wherein the second control member has second chamfered portions at respective corners of two flat surfaces of the second control member.
  9. 　エレベーター用巻上機の軸受取替方法であって、
    　前記巻上機は、
    　モーター部と、
    　一端が前記モーター部の回転軸に連結されたウォーム軸と、
    　前記ウォーム軸が挿し通された歯車箱と、
    　前記歯車箱に取り付けられ、前記ウォーム軸を支持するスラスト部軸受と、
    　前記歯車箱と前記モーター部との間において前記ウォーム軸に固定されたブレーキホイールと、を含んで構成され、
    　前記軸受取替方法は、
    　請求項１から請求項４の何れか１項に記載の第一規制部材を、前記ブレーキホイールと前記歯車箱との間に設置する工程と、
    　前記スラスト部軸受を前記ウォーム軸から引き抜く工程と、
    　前記第一規制部材を前記巻上機から撤去する工程と、
    　を備えるエレベーター用巻上機の軸受取替方法。     A method for replacing bearings in an elevator hoist, comprising the steps of:
    The hoisting machine includes:
    The motor section,
    A worm shaft having one end connected to a rotating shaft of the motor unit;
    a gear box through which the worm shaft is inserted;
    a thrust bearing attached to the gear box and supporting the worm shaft;
    a brake wheel fixed to the worm shaft between the gear box and the motor unit,
    The bearing replacement method includes:
    a step of installing the first stop member according to any one of claims 1 to 4 between the brake wheel and the gear box;
    extracting the thrust bearing from the worm shaft;
    removing the first stop member from the hoist;
    A bearing replacement method for an elevator hoisting machine comprising:
  10. 　エレベーター用巻上機の軸受取替方法であって、
    　前記巻上機は、
    　モーター部と、
    　一端が前記モーター部の回転軸に連結されたウォーム軸と、
    　前記ウォーム軸が挿し通された歯車箱と、
    　前記歯車箱に取り付けられ、前記ウォーム軸を支持するスラスト部軸受と、
    　前記歯車箱と前記モーター部との間において前記ウォーム軸に固定されたブレーキホイールと、を含んで構成され、
    　前記軸受取替方法は、
    　請求項５から請求項８の何れか１項に記載の第二規制部材を、前記ブレーキホイールと前記モーター部との間に設置する工程と、
    　前記スラスト部軸受を前記ウォーム軸へ取り付ける工程と、
    　前記第二規制部材を前記巻上機から撤去する工程と、
    　を備えるエレベーター用巻上機の軸受取替方法。     A method for replacing bearings in an elevator hoist, comprising the steps of:
    The hoisting machine includes:
    The motor section,
    A worm shaft having one end connected to a rotating shaft of the motor unit;
    a gear box through which the worm shaft is inserted;
    a thrust bearing attached to the gear box and supporting the worm shaft;
    a brake wheel fixed to the worm shaft between the gear box and the motor unit,
    The bearing replacement method includes:
    a step of installing the second regulating member according to any one of claims 5 to 8 between the brake wheel and the motor unit;
    mounting the thrust bearing to the worm shaft;
    removing the second regulating member from the hoist;
    A bearing replacement method for an elevator hoisting machine comprising:
PCT/JP2022/038905 2022-10-19 2022-10-19 Bearing replacement assisting tool for elevator hoist and bearing replacement method WO2024084620A1 (en)

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Application Number Priority Date Filing Date Title
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Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2022/038905 WO2024084620A1 (en) 2022-10-19 2022-10-19 Bearing replacement assisting tool for elevator hoist and bearing replacement method

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008308312A (en) * 2007-06-15 2008-12-25 Hitachi Industrial Equipment Systems Co Ltd Elevator hoist
JP2013001557A (en) * 2011-06-21 2013-01-07 Toshiba Elevator Co Ltd Winding machine and improvement method thereof
JP2017100860A (en) * 2015-12-03 2017-06-08 株式会社明電舎 Hoist
US20200270100A1 (en) * 2016-11-22 2020-08-27 Otis Elevator Company Method and kit for retrofitting elevator machines with thrust bearing, and retrofitted elevator machine
JP2021075354A (en) * 2019-11-07 2021-05-20 三菱電機ビルテクノサービス株式会社 Removal device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008308312A (en) * 2007-06-15 2008-12-25 Hitachi Industrial Equipment Systems Co Ltd Elevator hoist
JP2013001557A (en) * 2011-06-21 2013-01-07 Toshiba Elevator Co Ltd Winding machine and improvement method thereof
JP2017100860A (en) * 2015-12-03 2017-06-08 株式会社明電舎 Hoist
US20200270100A1 (en) * 2016-11-22 2020-08-27 Otis Elevator Company Method and kit for retrofitting elevator machines with thrust bearing, and retrofitted elevator machine
JP2021075354A (en) * 2019-11-07 2021-05-20 三菱電機ビルテクノサービス株式会社 Removal device

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