WO2015125266A1

WO2015125266A1 - Elevator device

Info

Publication number: WO2015125266A1
Application number: PCT/JP2014/054113
Authority: WO
Inventors: 尚文尾方; 哲志小野; 遼小松
Original assignee: 株式会社日立製作所
Priority date: 2014-02-21
Filing date: 2014-02-21
Publication date: 2015-08-27
Also published as: JP6236143B2; JPWO2015125266A1; CN105764831A; CN105764831B

Abstract

An elevator device comprising a low-profile hoist having: a housing (5) disposed within the hoistway; a main shaft (7) supported at one end thereof by the housing; bearings (11, 12) affixed to the outer periphery of one axial end of the main shaft; an annular rope sheave (6) rotatably mounted to the bearings; and a motor for rotating and driving the rope sheave, the elevator device being configured so that the car is moved vertically by means of a main rope wrapped around the rope sheave, wherein: the main shaft is configured as a hollow main shaft; a rotating circular plate-like sealing body (19) is affixed to the opening end side of the rope sheave, which faces the car; an encoder (21) for detecting the rotational speed of the rotating circular plate-like sealing body is disposed within the hollow section of the hollow main shaft; a rotating shaft (20b) connected to the encoder is formed at the center of rotation of the rotating circular plate-like sealing body; and a shaft-like detection section (20a) is formed coaxially with the rotating shaft (20b) on the surface of the side of the rotating circular plate-like sealing body (19), which faces the car.

Description

Elevator equipment

The present invention relates to an elevator apparatus equipped with a thin hoisting machine.

Recently, a so-called machine room-less elevator device without a machine room has become widespread. In the case of this machine room-less elevator device, all the devices conventionally installed in the machine room are installed in the hoistway, and the hoisting machine is also installed in the hoistway. There are various configurations for installing the hoisting machine in the hoistway. For example, the hoisting machine is installed so that it partially overlaps the car cross section at the lowermost or uppermost part of the hoistway, or the height direction of the hoistway In the middle part, there is one that installs a hoisting machine in the gap between the car and the hoistway wall. Usually, since the clearance between the carriage and the hoistway wall is about several hundred mm, a thin hoisting machine is required to install the hoisting machine in the clearance.

Thin hoisting machines are generally installed in the gap of about several hundred mm between the hoistway and the ride, facing the hoistway wall, and the side of the hoisting machine is balanced There are many cases where weights are placed. That is, the thin hoisting machine is installed in a form surrounded on all sides by a hoistway wall, a car and a counterweight. Therefore, if the thin hoisting machine can be reduced in size, the cross section of the hoistway can be reduced, and the degree of freedom in layout of devices installed in the hoistway can be increased. For this reason, downsizing of the thin hoisting machine used in the machine room-less elevator device, in particular, reduction of the axial length of the entire hoisting machine, that is, thinning is an important technical issue.

Further, as the hoisting machine, a hollow main shaft that is cantilever-supported to the housing is provided, the sheave is rotatably supported via a bearing on the hollow main shaft, and an encoder is disposed in the hollow portion of the hollow main shaft. The configuration is known (see Patent Document 1).

JP 2004-229498 A

However, in the thin hoisting machine in the conventional elevator apparatus, since the operator does not sufficiently consider the adjustment and inspection work of the hoisting machine and the encoder from the car side, the hoisting machine and the encoder are adjusted. And the inspection work was not easy.

An object of the present invention is to provide an elevator apparatus equipped with a thin hoisting machine that allows an operator to easily perform adjustment and inspection work of the hoisting machine and encoder from the car side.

In order to achieve the above object, the present invention provides a housing disposed in a hoistway in which a car moves up and down, a main shaft that is cantilevered by the housing, and an outer peripheral end fixed in the axial direction of the main shaft. A thin hoisting machine having an annular sheave disposed between the bearing and the chassis and the housing and rotatably attached to the bearing; and a motor that rotationally drives the sheave An elevator apparatus for moving a car up and down via a main rope wound around the sheave, wherein the main shaft is formed as a hollow main shaft and is configured as a hollow main shaft. A rotating disk-shaped sealing body that closes one end side in the axial direction of the hollow main shaft and the opening end side of the sheave is fixed to the opening end side that faces the car and is disposed in the hollow portion of the hollow main shaft. Is an encoder that detects the rotational speed of the rotating disk-shaped sealing body. Is disposed at the center of rotation of the rotating disk-shaped sealing body, and a rotating shaft is formed in the hollow portion of the hollow main shaft and connected to the encoder, and the rotating disk-shaped sealing body An axial detector is formed coaxially with the rotating shaft on the opposite surface side of the car.

According to the present invention, the operator can easily perform adjustment and inspection work of the hoisting machine and the encoder from the car side.

It is sectional drawing of the elevator apparatus which concerns on this invention. It is sectional drawing of the thin hoist used for an elevator apparatus. It is a front view of a thin hoisting machine. It is a rear view of a thin hoisting machine.

(Example)
Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a sectional view of an elevator apparatus showing an embodiment of the present invention. In FIG. 1, a car 2 and a counterweight 3 that are lifted and lowered in opposite directions by a main rope (not shown) are arranged in a hoistway 1. A thin hoist 4 is installed in a gap in the hoistway 1 surrounded by the car 2 and the counterweight 3. The thin hoist 4 is disposed between a housing 5 fixed to a base (not shown) in the lower part of the hoistway 1, and between the housing 5 and the car 2, and can rotate around the housing 5. It is comprised from the sheave 6 connected with. A main rope is wound around the sheave 6, and the force accompanying the rotation of the sheave 6 is transmitted to the counterweight 3 and the car 2 via the main rope. At this time, the car 2 and the counterweight 3 move up and down in opposite directions. The inspection of the thin hoist 4 is normally performed from the car 2 side. At this time, the car 2 is arranged at a position away from the thin hoisting machine 4 (position on the upper side higher than the thin hoisting machine 4), and in the lower part of the hoistway 1 than the car 2. A space for an operator to check the thin hoist 4 is formed.

FIG. 2 is a cross-sectional view of a thin hoisting machine. In FIG. 2, the thin hoist 4 includes a housing 5 and a sheave 6 as main components. The casing 5 is manufactured by machining only a portion requiring dimensional accuracy after being molded into a rough shape with cast iron or the like, and a hollow boss portion 8 is integrally formed at the center thereof. A housing recess 8 a for housing the stator 9, the rotor core 10, and the like is integrally formed in the outer peripheral portion of the boss portion 8 in a substantially cylindrical shape with a bottom. A hollow main shaft 7 is inserted in the center of the boss portion 8, and the hollow main shaft 7 is integrally coupled to the housing 5. On the outer peripheral side of the hollow main shaft 7, a sheave 6 that is formed in a substantially cylindrical shape and surrounds one end side in the axial direction of the hollow main shaft 7 is disposed. Between the one end side in the axial direction of the hollow main shaft 7 and the sheave 6, a pair of

bearings

11 and 12 formed in an annular shape are disposed close to each other, and an annular oil seal material 17 is provided. , 24, 25 are arranged, and an opening on one end side of the sheave 6 in the axial direction and one end in the axial direction of the hollow main shaft 7 on one end side in the axial direction of the sheave 6 (on the side facing the car 2). A rotating disk-shaped sealing body 19 for closing the opening on the side is detachably fixed.

The stator 9 stored in the storage recess 8a is fixed to the inner peripheral side wall surface of the storage recess 8a. The stator 9 includes a stator core (not shown) in which electromagnetic steel plates are laminated, a three-phase stator winding 13 composed of a U phase, a V phase, and a W phase, an insulating member, and the like. ing. In addition, an annular protrusion 14 that extends toward the sheave 6 and surrounds the outer peripheral portion of the hollow main shaft 7 is integrally formed in a region of the housing 5 between the housing recess 8 a and the boss portion 8. Is formed. An annular oil receiving cover 15 that surrounds the outer peripheral portion of the hollow main shaft 7 and restricts the flow of leaked oil is attached to the top of the annular protrusion 14 on the sheave 6 side with bolts.

The height and shape of the annular protrusion 14 are selected so that the oil receiving cover 15 is located on the sheave 6 side of the center of the boss 8 of the housing 5 and the sheave 6 facing the boss 8. ing. The oil receiving cover 15 has a thickness of about 1 mm, and its inner diameter is extended to the vicinity thereof without contacting the oil seal material 17 disposed at the left end of the sheave 6. Between the housing 5 and the sheave 6, a space portion surrounded by the oil receiving cover 15, the housing 5 and the annular protrusion 14 facing the oil receiving cover 15, and surrounds the outer peripheral portion of the hollow main shaft 7. An annular oil drop space 16 is formed. The oil drop space portion 16 is formed below the region of the housing 5 that faces the oil seal material 25 and is configured as a space portion that receives leaked oil that has passed through the oil seal material 25. Further, on the stator 9 side of the annular protrusion 14, a wiring storage portion 16 a that is separated from leaked oil by an oil receiving cover 15 is formed. The wiring storage portion 16a is used as a space portion for storing wiring connected to the stator winding 13 and the like.

A pair of

bearings

11 and 12 arranged on the outer peripheral side of the hollow main shaft 7 are fixed to the outer peripheral surface of the hollow main shaft 7 and rotatably support the sheave 6. The oil seal material 24 disposed adjacent to the bearing 12 is disposed between the bearing 12 and the rotating disk-shaped sealing body 19, and is an end on one end side in the axial direction (the car 2 side) of the hollow main shaft 7. It is fixed to the outer peripheral side of an annular labyrinth seal material 26 attached to the part. In the oil seal material 24, oil in the space 50 between the bearing 12 and the oil seal material 24 leaks into the space 51 between the oil seal material 24 and the rotating disk-shaped sealing body 19. As a sealing portion for preventing leakage.

The labyrinth seal material 26 serves as a seal portion that prevents leakage oil in the space portion 51 from entering the space portion 52 between the hollow portion 7a of the hollow main shaft 7 and the rotary disk-shaped sealing body 19. It is configured. The oil seal member 25 is disposed between the bearing 11 and the boss portion 8 and is an annular oil seal attached to an opening on the other end side in the axial direction of the hollow main shaft 7 (the opposite side to the car 2). It is fixed to the inner peripheral side of the material 17. In the oil seal material 25 and the oil seal material 17, the oil in the space 53 formed between the bearing 11 and the oil seal material 25 is oil-dropping space between the boss 8 and the oil receiving cover 15. 16 is configured as a seal portion that prevents leakage as leaked oil.

On the other hand, an annular rotor core 10 is provided on the outer peripheral portion of a sheave 6 rotatably supported via

bearings

11 and 12 on a hollow main shaft 7 supported by a boss portion 8 of the casing 5 in a cantilever structure. Are integrally formed, and a groove 6a for winding the main rope is formed. The rotor core 10 is disposed to face the stator 9 housed in the housing recess 8 a of the housing 5. A plurality of permanent magnets 18 are affixed and fixed to the inner peripheral surface of the rotor core 10, thereby constituting a rotor of a surface magnet type motor. In this case, the rotor core 10 needs to be a magnetic body, and is integrally formed with the sheave 6 and the magnetic body. Electromagnetic brake devices 35 for applying a braking force to the rotor core 10 are arranged vertically on the outer periphery of the storage recess 8a facing the rotor core 10.

Also, the sheave 6 is formed with an oil passage 60 that is continuous with the

space portions

50 and 53 and an oil passage 61 that is continuous with the space portion 54 between the bearing 11 and the bearing 12. The rotating disk-shaped sealing body 19 is formed with a shaft-shaped detecting portion 20a and a rotating shaft 20b coaxially at the center thereof. The rotating disk-shaped sealing body 19 is formed with an annular concavo-convex portion 19 a on the side facing the sheave 6 and the hollow main shaft 7. Further, the rotary disk-shaped sealing body 19 has a plurality of openings 27 connected to the

oil passages

60 and 61 and a plurality of openings 28 connected to the space 51. Each opening 27 is closed by a plug after oil is supplied from any one of the openings 27 to the

bearings

11 and 12 via the

oil passages

60 and 61. On the other hand, each opening 28 is always open. In addition, what has a pressure release valve can also be used for the stopper for obstruct | occluding each opening 27. FIG.

Here, the annular projection 14 is formed integrally with the housing 5, but the annular projection 14 provided on the housing 5 is formed of a separate member from the housing 5 and can be fixed with a bolt. It is desirable to put a sealant such as a liquid gasket or an O-ring on the contact surface between the housing 5 and the annular protrusion 14. Similarly, after manufacturing the sheave 6 and the rotor core 10 as separate members, they may be fixed with bolts or fittings. In this case, the sheave 6 and the rotor core 10 may be made of different materials. Further, the motor can adopt other configurations, and the rotational torque generated by the motors of various configurations is transmitted to the sheave 6 via the rotor core 10 and is wound around the sheave 6 (not shown). The car 2 and the counterweight 3 are driven up and down by a main rope such as a plurality of ropes.

A rotary disk-shaped sealing body 19 is detachably fixed to an end surface of the sheave 6 facing the car 2, and a shaft-shaped detection unit that protrudes toward the car 2 is provided at the center thereof. 20a and the rotating shaft 20b which protrudes in the hollow part 7a of the hollow main shaft 7 are formed. The rotating shaft 20b is connected to a rotating disk (not shown) of the encoder 21 arranged using the hollow portion 7a of the hollow main shaft 7. The encoder 21 is a rotational speed sensor that detects the rotational speed of the rotary disk-shaped sealing body 19, that is, the rotational speed of the sheave 6, and the detection output of the encoder 21 is a signal having a detachable connection portion 22. Derived by line 23.

Since the

bearings

11, 12 and the

space portions

50, 53, 54 are filled with a lubricant such as grease from any one of the openings 27, the space portion 50 is sealed by the oil seal material 24, and the space portion 53 is oil-filled. Although sealed by the sealing material 25, measures are taken against the leaked oil that has passed through the

oil sealing materials

24, 25.

First, a description will be given of leakage countermeasures against pressure increases near the

bearings

11 and 12 and the

oil seal materials

24 and 25.

Between the bearing 12 and the rotating disk-shaped sealing body 19 and between the outer periphery on one end side in the axial direction of the hollow main shaft 7 and the sheave 6, the outer periphery on one end side in the axial direction of the hollow main shaft 7 is covered. An annular labyrinth seal material 26 and an annular oil seal material 24 covering the outer periphery of the labyrinth seal material 26 are disposed. The labyrinth seal material 26 is provided with a labyrinth seal portion 26 a that is arranged along the radial direction of the hollow main shaft 7 and that is combined with the concavo-convex portion 19 a of the rotating disk-shaped sealing body 19 to form an airtight portion. ing. The labyrinth seal portion 26 a is formed in an annular shape so as to surround the rotation shaft 20 b disposed at the rotation center of the rotating disk-shaped sealing body 19. At this time, even if the oil in the space 50 passes through the oil seal material 24, the labyrinth seal 26a prevents the oil from entering the space 52 from the space 51 as leaked oil. For this reason, even if the oil seal material 24 deteriorates, it is possible to prevent the leaked oil from entering the encoder 21 in the hollow portion 7a. Furthermore, even if the pressure of the oil in the space 51 increases, the pressure in the space 51 is released through the opening 28 of the rotating disk-shaped sealing body 19. For this reason, it is possible to prevent leakage oil from being generated as the pressure in the space 51 increases.

An opening in which the space 54 between the

bearings

11 and 12 is located outside the labyrinth seal portion 26a with respect to oil leakage due to an increase in the oil pressure in the space 54 between the

bearings

11 and 12. By opening through the oil passage 61 connected to 27, the generation of leaked oil accompanying the rise in pressure in the space 54 is prevented. In addition, the oil pressure in the space portion 53 between the bearing 11 and the oil seal material 25 adjacent thereto and the oil pressure in the space portion 50 between the bearing 12 and the oil seal material 24 adjacent thereto is increased. Is released through the oil passage 60 connected to the opening 27 located on the outer side of the labyrinth seal portion 26 a, thereby preventing leakage oil from being generated due to the pressure increase in the space portion 50. At this time, a plug having a pressure release valve is used as a plug for closing each opening 27.

FIG. 3 is a front view of the thin hoist 4 seen from the car 2 side. In FIG. 3, the rotating disk-shaped sealing body 19 attached to the sheave 6 has a plurality of openings 27 discretely formed on the same circumference and a plurality of openings 28. Are more discretely formed on the circumference on the side of the axial detector 20a. A hole 32 is formed on the lower side of the housing 5 so as to penetrate the front surface side (the car 2 side) and the back surface side of the housing 5. An oil sump 34 for storing oil to be dripped (leakage oil dripping from the oil dropping space 16) is formed. The oil sump 34 has a car in the housing 5 so that it can be confirmed from the car 2 side by visual inspection, finger insertion, or the like whether the oil leaked in the oil sump 34 exists. It is arranged on the 2 side. In the case of the oil reservoir 34 that can be visually inspected, the oil reservoir 34 is formed by cutting the housing 5, the side portion thereof is hermetically sealed with a transparent plate-like member, and the worker is transparent from the car 2 side. It is preferable that visual confirmation can be made through the plate-like member.

When the sheave 6 and the rotating disk-shaped sealing body 19 are stopped or when the sheave 6 and the rotating disk-shaped sealing body 19 are rotated, they communicate with the

spaces

50, 53, and 54 shown in FIG. When the

oil passages

60, 61 coincide with the openings 27, the pressures in the

spaces

50, 53, 54 are released.

Therefore, the generation of leaked oil due to pressure rise is prevented. In addition, since each of the

space portions

50, 53, and 54 is opened from the opening 27 located outside the labyrinth seal portion 26a, leaked oil enters the hollow portion 7a of the hollow main shaft 7 from the space portion 52. It does not penetrate and does not adversely affect the encoder 21 arranged in the hollow portion 7a of the hollow main shaft 7.

Next, leakage oil due to deterioration of the oil seal material 25 will be described. The leaked oil that leaks due to the deterioration of the oil seal 25 drops downward from the outer peripheral surface of the hollow main shaft 7 and reaches the oil dropping space 16. Since the oil drop space portion 16 is sealed by the above-described disk-shaped oil receiving cover 15 provided at a position where it does not come into contact with the end face of the sheave 6 on the housing 5 side, the oil drop space portion 16 In addition, the leaked oil does not enter the stator 9 located on the lower side. The recovery of leaked oil will be described with reference to FIGS.

FIG. 4 is a rear view of the hoist 4 seen from the back side. In FIG. 4, an opening 29 communicating with the oil dropping space portion 16 is formed in the boss portion 8 at a position corresponding to the oil dropping space portion 16. A conduit 30 is disposed in the housing 5 near the lower portion of the opening 29. When the oil in the space portion 52 passes through the oil seal material 25 and drops into the oil dropping space portion 16 with the deterioration of the oil seal material 25, the leaked oil is guided from the opening 29 through the conduit 30. . The conduit 30 is fixed to the housing 5 by welding so that the leaked oil does not leak, or is attached to the housing 5 in a state of being kept airtight with bolts or the like via a seal member. The conduit 30 includes a receiving portion 31 that is located at the upper portion thereof and receives leaked oil from the opening 29, and an oil guide portion 33 that connects the receiving portion 31 and a hole (through hole) 32 formed in the housing 5. Is done. That is, the housing 5 is formed with an oil passage (opening 29, conduit 30 and hole 32) for guiding the leaked oil in the oil dropping space 16 to the oil sump 34. When a part of the casing 5 is cut to form the oil guide portion 33, the conduit 30 can be a plate-like body that seals the outer surface of the oil guide portion 33, and the configuration is simplified.

Here, when the oil in the space portion 53 passes through the oil seal material 25 and drops as leaked oil in the oil dropping space portion 16 as the oil seal material 25 deteriorates, 29 through a conduit 30. The leaked oil guided to the conduit 30 is guided to the oil sump 34 shown in FIG.

In this way, the leaked oil that leaks due to the deterioration of the oil seal material 25 is dropped into the oil dropping space 16 and then guided to the oil sump 34 disposed at the position facing the car 2 in the housing 5. It is burned.

Next, adjustment and inspection work of the hoist 4 and the encoder 21 will be described. The encoder 21 shown in FIG. 2 is configured to detect the rotational speed of the rotary disk-shaped sealing body 19 and the rotary shaft 20b and to output a detection signal to a control panel (not shown). In order to obtain a simple detection signal, it is necessary to correctly position the rotary shaft 20b on the rotation center line of the rotary disk-shaped sealing body 19. When this adjustment is performed, the operator must perform from the side of the car 2, but from the side of the car 2, just by visually observing the rotating disk-shaped sealing body 19 in a stopped state, the required accurate Information, that is, information on whether or not the rotating disk-shaped sealing body 19 is arranged at a correct position cannot be obtained.

However, on the side of the car 2 of the rotating disk-shaped sealing body 19, a shaft-shaped detecting portion 20a is formed in advance on the rotation center line. Therefore, when the shaft-shaped detection unit 20a is observed while rotating the sheave 6 or the rotating disk-shaped sealing body 19, it can be determined whether or not the rotating disk-shaped sealing body 19 is fixed at the correct position. . That is, if the rotating disk-shaped sealing body 19 is disposed at a correct position, the shaft-shaped detection unit 20a rotates on the rotation center without being displaced from the rotation center. However, if the rotating disk-shaped sealing body 19 is arranged slightly deviated from the rotation center in the radial direction, the shaft-shaped detection unit 20a deviates from the original rotation center line and rotates so as to shake. For this reason, the operator can easily visually discriminate between the former state and the latter state when inspecting the encoder 21, and in the latter case, the rotating disk-shaped sealing body 19 Readjust the mounting position.

Thus, when the shaft-shaped detection part 20a is not formed in the rotating disk-shaped sealing body 19, the rotating shaft 20b which connects between the encoder 21 and the rotating disk-shaped sealing body 19 is provided with the rotating disk-shaped sealing body. It cannot be visually determined whether or not it is correctly positioned on the rotation center line of the stationary body 19. In this case, in order to confirm it visually, the inside of the hollow part 7a of the rotating disk-shaped sealing body 19 had to be looked into from the back side of the hoisting machine 4. On the other hand, in the present embodiment, since the shaft-shaped detection unit 20a is formed coaxially with the rotation shaft 20b on the car 2 side of the rotating disk-shaped sealing body 19, the rotation of the shaft-shaped detection unit 20a is detected. It is possible to easily determine visually whether or not the rotating disk-shaped sealing body 19 is fixed at the correct position from the difference in manner.

In addition, when it is necessary to replace the encoder 21 for adjustment or maintenance, the rotating disk-shaped sealing body 19 is removed, and the connector 21 and the signal line 23 are connected while slightly pulling out the signal line 23 in the hollow portion 7a. The encoder 22 is separated from the hollow portion 7 a of the hollow main shaft 7. Thereafter, a new encoder 21 is attached to the connection portion 22, and then the rotating disk-shaped sealing body 19 is attached.

Further, as described above, the leaked oil leaking with the deterioration of the oil seal 25 is dropped into the oil dropping space 16 and then guided to the oil sump 34 disposed facing the car 2 side. Therefore, it can be easily confirmed from the car 2 side whether there is leaked oil that leaks as the oil seal 25 deteriorates.

The worker visually observes the shaft-shaped detection unit 20a from the side of the car 2, and the worker determines whether or not the shaft-shaped detection unit 20a is rotating correctly on the rotation center line of the rotating disk-shaped sealing body 19. Instead, it is also possible to determine whether or not the rotating disk-shaped sealing body 19 is disposed at a correct position by using a detection device that detects how the shaft-shaped detection unit 20a rotates.

In the present embodiment, when the shaft-shaped detection unit 20a is observed, if the rotating disk-shaped sealing body 19 is disposed at the correct position, the shaft-shaped detection unit 20a is not positioned on the rotation center line and does not move. On the other hand, if the rotating disk-shaped sealing body 19 is arranged slightly deviated in the radial direction from the rotation center, the shaft-shaped detection unit 20a is deviated from the original rotation center line and shakes. It can be discriminated that it rotates, and it can be easily known whether or not the rotating disk-shaped sealing body 19 is fixed at the correct position.

According to the present embodiment, the operator can easily adjust and inspect the hoisting machine 4 and the encoder 21 from the car 2 side.

In addition, according to the present embodiment, the encoder 21 can be easily replaced from the car 2 side by removing the rotating disk-shaped sealing body 19 from the sheave 6. In the hoisting machine 4, the hollow main shaft 7 is cantilevered by the housing 5, and the encoder 21 is disposed in the hollow portion 7 a of the hollow main shaft 7. The length can be shortened to make it thinner.

In addition, this invention is not limited to the above-mentioned Example, Various modifications are included. For example, the bearing may be a single bearing or three or more bearings. The above-described embodiments have been described in detail for easy understanding of the present invention, and are not necessarily limited to those having all the configurations described.

2 car, 4 hoisting machine, 5 chassis, 6 sheaves, 7 hollow main shaft, 11, 12 bearings, 16 oil drop space, 17 oil seal material, 19 rotating disk-shaped sealing body, 20a shaft detection Part, 20b rotary shaft, 21 encoder, 24, 25 oil seal material, 26 labyrinth seal material, 26a labyrinth seal part, 27-29 opening, 30 conduit, 32 hole, 33 oil guide, 34 oil sump.

Claims

A housing disposed in a hoistway in which a car moves up and down, a main shaft that is cantilevered by the housing, a bearing that is fixed to the outer periphery on one axial end side of the main shaft, and the car and the housing And a thin hoisting machine having an annular sheave rotatably attached to the bearing, and a motor that drives the sheave to rotate, and is wound around the sheave In an elevator device that moves the car up and down via a cable,
The main shaft is formed as a hollow main shaft formed in a hollow shape,
On the opening end side of the sheave that faces the car, a rotating disk-shaped sealing body that closes the axial one end side of the hollow main shaft and the opening end side of the sheave is fixed,
In the hollow portion of the hollow main shaft, an encoder that detects the rotational speed of the rotating disk-shaped sealing body is disposed,
A rotation shaft that is disposed in a hollow portion of the hollow main shaft and is connected to the encoder is formed at a rotation center portion of the rotation disk-shaped sealing body, and the car of the rotation disk-shaped sealing body is formed. An elevator apparatus characterized in that a shaft-shaped detection portion is formed coaxially with the rotating shaft on the side facing the surface.
The elevator apparatus according to claim 1,
The said rotating disc-shaped sealing body is detachably fixed to the opening end side which faces the said riding car among the said sheaves, The elevator apparatus characterized by the above-mentioned.