JP6475136B2 - Hoisting machine and elevator - Google Patents

Description

  The present invention relates to a hoisting machine that moves a car up and down and an elevator equipped with the hoisting machine.

  Conventionally, an elevator includes a car, a counterweight, a rope that connects the car and the counterweight, and a hoisting machine on which the rope is wound. The hoisting machine has a main shaft, a sheave supported rotatably on the main shaft and wound with a rope, and a rotor block connected to the sheave. The hoisting machine has a rotation detector that detects the rotation speed of the rotor block.

  In recent years, there has been a demand for smaller and thinner hoisting machines. However, when the hoisting machine is reduced in size and thickness, heat is trapped in the hoisting machine, and the heat dissipation performance of the electric motor constituting the hoisting machine is lowered. As a result, there has been a problem that the temperature rise of the electric motor increases and a malfunction occurs in the rotation detector.

  In order to solve such a problem, for example, a technique described in Patent Document 1 is disclosed. Patent Document 1 includes a housing provided with a stator, a rotating frame provided with a permanent magnet at a position facing the stator, and a sheave provided in the rotating frame, and the rotating frame is a bearing. The hoisting machine supported by the main shaft connected to the housing via is described.

  In the technique described in Patent Document 1, the main shaft has a hollow shape communicating from one end to the other end, a storage space for storing an encoder for detecting the rotation of the rotating frame on the connection end side with the housing, and the other end side. A through hole communicating with the storage space. The encoder housed in the housing space and fixed to the housing is provided so that the other end rotates together with the rotating frame, and connects one end of the encoder shaft inserted into the through hole from the other end of the main shaft. ing. The encoder shaft is provided with blades in the storage space, and the encoder shaft is provided with a vent hole communicating from the other end of the encoder shaft to the storage space.

JP 2012-218859 A

  However, in the technique described in Patent Document 1, since the blades are provided in the storage space for storing the encoder serving as the rotation detector, it is necessary to form a large storage space. Furthermore, when maintaining the encoder which is a rotation detector, the blade | wing arrange | positioned in storage space becomes obstructive and had the problem that the workability | operativity of a maintenance work fell. Furthermore, in the technique described in Patent Document 1, it is necessary to form ventilation holes and blades on the encoder shaft, and the mechanism for cooling the rotation detector is complicated.

  In view of the above problems, an object of the present invention is to provide a hoisting machine and an elevator capable of simplifying a mechanism for cooling a rotation detector and improving workability of maintenance work.

In order to solve the above problems and achieve the object of the present invention, the hoisting machine of the present invention is a hoisting machine on which a rope connected to a car is wound. The hoisting machine includes a housing provided with a stator, a main shaft, a rotor block, a sheave, a rotation detector, a lid, and a closing plate.
The main shaft is attached to the housing and has a cylindrical hole penetrating along the axial direction and a storage portion formed in the cylindrical hole. The rotor block is rotatably supported by the main shaft and has a magnet facing the stator. The sheave is provided on the rotor block, and a rope is wound around it. The rotation detector is provided in a housing portion of the main shaft, and has a shaft portion that detects the rotation of the rotor block and the sheave and rotates with the rotor block and the sheave. The lid is fixed to the shaft portion, covers the opening of the through hole into which the main shaft of the sheave or the rotor block is inserted and the opening of the cylindrical hole, and rotates together with the sheave and the rotor block. The closing plate is fixed to the lid and covers an opening formed in the lid, and a ventilation hole and fins through which air passes are formed.
The lid has a recess in which the closing plate is disposed. A shielding member that shields electromagnetic waves is disposed on the main shaft. And a shielding member is arrange | positioned at the recessed part formed in the cover body, and is interposed between a cover body and a closing board.

  The elevator of the present invention includes a car that moves up and down in the hoistway, a counterweight connected via the car and a rope, and a hoisting machine that raises and lowers the car by winding the rope. I have. Moreover, the hoisting machine mentioned above is used for the hoisting machine.

  According to the hoisting machine and the elevator of the present invention, it is possible to simplify the mechanism for cooling the rotation detector and improve the workability of maintenance work.

1 is a schematic configuration diagram schematically showing an elevator according to an embodiment of the present invention. 1 is a plan view showing an elevator according to an embodiment of the present invention. It is sectional drawing which shows the winding machine concerning the embodiment of this invention. It is sectional drawing which shows the principal part of the winding machine concerning the embodiment of this invention. It is a top view which shows the cover body of the winding machine concerning the embodiment of this invention. It is a top view which shows the cover body and closing plate of the winding machine concerning the embodiment of this invention.

  Hereinafter, embodiments of an elevator and a hoist according to the present invention will be described with reference to FIGS. In addition, the same code | symbol is attached | subjected to the common member in each figure.

1. First, a configuration of an elevator according to an embodiment of the present invention (hereinafter referred to as “this example”) will be described with reference to FIGS. 1 and 2.
FIG. 1 is a schematic configuration diagram showing a configuration example of the elevator of this example.

  The elevator 1 of this example is a so-called machine room-less elevator that does not have a machine room above a hoistway 100 formed in a building structure. As shown in FIG. 1, the elevator 1 includes a car 110 that moves up and down in the hoistway 100, a hoisting machine 10, a counterweight 130, two driven pulleys 140 and 150, and a rope 170. Yes.

  A lifting pulley 111 is provided at the bottom of the car 110. The car 110 is guided by a pair of car guide rails 112 (see FIG. 2) to move up and down in the hoistway 100. The pair of car guide rails 112 is provided in the hoistway 100 and extends in the vertical direction in the hoistway 100.

  The counterweight 130 is provided with a weight-side pulley 131. The counterweight 130 moves up and down in the hoistway 100 while being guided by a pair of weight guide rails 122 (see FIG. 2). The pair of weight guide rails 122 is provided in the hoistway 100 and extends in the up-down direction in the hoistway 100, similarly to the pair of car guide rails 112.

  One end and the other end of the rope 170 are fixed to the uppermost part of the hoistway 100. Further, the first driven pulley 140 and the second driven pulley 150 are arranged at the uppermost part of the hoistway 100. The rope 170 is mounted on the first driven pulley 140 from the weight side pulley 131 to the first driven pulley 140 of the counterweight 130, and for lifting the hoisting machine 10, the second driven pulley 150, and the car 110. The pulley 111 is wound around in this order.

  The hoisting machine 10 is disposed at the lowermost part of the hoistway 100. A rope 170 is wound around the sheave 5 described later of the hoisting machine 10. As shown in FIG. 2, the hoisting machine 10 is arranged with the sheave 5 directed toward the car 110 that is opposite to the wall surface of the hoistway 100. When the hoisting machine 10 is driven, the sheave 5 rotates, and the hoisting machine 10 raises and lowers the car 110 and the counterweight 130 in a vine manner via the rope 170.

2. Next, the hoisting machine 10 of this example will be described with reference to FIGS.
FIG. 3 is a cross-sectional view showing the hoisting machine 10 of this example. FIG. 4 is a cross-sectional view showing a main part of the hoisting machine 10 of this example.

  As shown in FIG. 3, the hoisting machine 10 includes a frame 2, a main shaft 3, a rotor block 4, a sheave 5, a brake mechanism 6, and a stator 7. The hoisting machine 10 of this example is an outer rotor type hoisting machine in which the rotor block 4 is disposed outside the stator 7 in the radial direction. The hoisting machine 10 includes a rotation detector 9 that detects the rotation speeds of the rotor block 4 and the sheave 5 and two shielding members 43a and 43b that are electromagnetic shield covers.

  The frame 2 showing the housing is arranged on one end side in the axial direction of the main shaft 3. The frame 2 has a boss portion 11 to which the main shaft 3 is attached, an attachment portion 12 to which the stator 7 is fixed, and a connecting portion 13 that connects the boss portion 11 and the attachment portion 12. One end portion side of the main shaft 3 in the axial direction is fitted to the boss portion 11.

  The connecting portion 13 is provided with an annular protrusion 14. The protrusion 14 protrudes toward the other end of the connecting portion 13 in the axial direction of the main shaft 3. An oil receiving cover 15 is fixed to the top of the protrusion 14 on the other end side in the axial direction of the main shaft 3. A space portion 16 is formed between the oil receiving cover 15 and the connecting portion 13. Grease leaked from an oil seal 24 or the like to be described later accumulates in the space portion 16.

  An oil reservoir 17 is disposed in the vicinity of the space 16 that is disposed in the lower portion in the vertical direction. The space 16 and the oil reservoir 17 communicate with each other through a communication hole 18 provided in the connecting portion 13. The grease that has flowed into the space 16 passes through the communication hole 18 and flows into the oil reservoir 17.

  A mounting portion 12 is provided outside the connecting portion 13 in the radial direction. The attachment portion 12 is a concave portion formed in a substantially cylindrical shape with one end side in the axial direction of the main shaft 3 closed and the other end side opened. A stator 7 including a laminated electromagnetic steel sheet and a stator coil wound around the laminated electromagnetic steel sheet is fixed to the concave portion of the attachment portion 12.

  Brake mechanisms 6 are provided at the upper and lower portions of the frame 2 in the vertical direction. The brake mechanism 6 abuts on a rotor block 4 which will be described later, thereby braking the rotation operation of the rotor block 4 and the sheave 5.

  The main shaft 3 is formed in a cylindrical shape and has a cylindrical hole 3a that penetrates from one end to the other end in the axial direction. A storage portion 31 is formed at the other end portion of the main shaft 3 in the axial direction. The storage portion 31 is formed by expanding the other end side in the axial direction of the cylindrical hole 3a of the main shaft 3 in the radially outward direction. The rotation detector 9 is stored in the storage unit 31. The configuration of the rotation detector 9 will be described later.

  A first shielding member 43a is fixed to one end of the main shaft 3 in the axial direction. The 1st shielding member 43a is being fixed to the main axis | shaft 3 so that the opening of the axial direction one end side in the cylinder hole 3a may be plugged up. The 1st shielding member 43a is comprised by the net-like member. The first shielding member 43a has a role as an electromagnetic shield that shields electromagnetic waves. Moreover, the 1st shielding member 43a is preventing that the dust and dust which float in the hoistway 100 penetrate | invade into the accommodating part 31 via the cylinder hole 3a.

  The rotor block 4 and the sheave 5 are rotatably attached to the side of the main shaft 3 where the storage portion 31 is formed, that is, the other end portion in the axial direction.

  The rotor block 4 and the sheave 5 are configured integrally with each other via a connection portion 8. The rotor block 4 is formed in a substantially cylindrical shape. The rotor block 4 is inserted between the stator 7 fixed to the mounting portion 12 of the frame 2 and the brake mechanism 6. The rotor block 4 is disposed to face the stator 7.

  A plurality of magnets 20 are fixed to the inner wall surface on the inner side in the radial direction of the rotor block 4. The plurality of magnets 20 are fixed at predetermined intervals along the circumferential direction of the rotor block 4. Therefore, the plurality of magnets 20 face the stator 7 fixed to the mounting portion 12 of the frame 2 with a predetermined interval. The plurality of magnets 20 are alternately arranged with N and S poles along the circumferential direction of the rotor block 4. The number of N-pole magnets 20 and the number of S-pole magnets 20 are set to the same number.

  In addition, a connecting portion 8 is continuously provided at the end of the rotor block 4 on the other end side in the axial direction of the main shaft 3. The connecting portion 8 is substantially vertically continuous from the end of the rotor block 4 toward the inside in the radial direction. A sheave 5 is provided inside the connecting portion 8 in the radial direction.

  The sheave 5 protrudes from the end of the connecting portion 8 in the direction opposite to the rotor block 4. The sheave 5 is formed in a cylindrical shape. A rope 170 shown in FIG. 1 is wound around the sheave 5. Then, the rope 170 is wound around the sheave 5 by rotating the sheave 5.

  A bearing housing 21 is provided inside the sheave 5 in the radial direction. The bearing housing 21 is formed in a cylindrical shape, and is formed with a through hole 21a penetrating from one end to the other end in the axial direction. A bearing 22 is provided on the inner wall of the through hole 21 a of the bearing housing 21. The main shaft 3 is inserted into the through hole 21 a of the bearing housing 21. The bearing housing 21 is rotatably supported on the other end portion of the main shaft 3 in the axial direction via a bearing 22.

  Oil seals 24 are provided at both ends in the axial direction of the through-hole 21a of the bearing housing 21, respectively. The oil seal 24 is interposed between the inner wall of the through hole 21 a of the bearing housing 21 and the outer peripheral surface of the main shaft 3. The oil seal 24 seals the space formed by the other axial end of the main shaft 3 and the through hole 21 a of the bearing housing 21. The oil seal 24 seals the grease sealed in the bearing 22.

  Further, a lid body 41 is fixed to the other end side of the bearing housing 21 in the axial direction. As shown in FIG. 4, the lid body 41 is fixed to the bearing housing 21 via a fixing bolt 51 so as to close the opening on the other end side in the axial direction of the through hole 21 a of the bearing housing 21. Therefore, the lid body 41 faces the cylindrical hole 3 a of the main shaft 3 and the storage portion 31.

FIG. 5 is a plan view showing the lid 41.
As shown in FIGS. 4 and 5, the lid body 41 is formed in a circular flat plate shape. As shown in FIG. 5, a concave portion 41 b is formed in the central portion of the lid body 41 in the radial direction. The concave portion 41b is formed in a substantially circular shape on one surface opposite to the facing surface facing the storage portion 31 provided on the main shaft 3 in the lid body 41. The recess 41b is recessed from one surface toward the storage portion 31.

  Two substantially semicircular openings 41a are opened in the recess 41b. The number of openings 41a is not limited to two, but may be one, or three or more. Further, a joint shaft portion 41c is provided between the central portion of the lid body 41 in the radial direction, that is, between the two openings 41a. A shaft portion 9b of a rotation detector 9 described later is fixed to the joint shaft portion 41c.

  In addition, a plurality of fixing holes 41 d through which the screw portions of the fixing bolts 51 are inserted are provided in the outer edge portion of the lid body 41. Furthermore, a plurality of fixing holes 41e through which the screw portions of the fixing bolts 52 are inserted are provided in the outer edge portion of the recess 41b. Further, when the lid body 41 is fixed to the bearing housing 21, the lid body 41 faces the car 110 side that is the opposite side of the wall surface of the hoistway 100 (see FIG. 2).

  As shown in FIG. 4, the second shielding member 43 b and the closing plate 42 are fixed to the recess 41 b of the lid body 41 via the fixing bolt 52 so as to close the two openings 41 a. Therefore, the closing plate 42 faces the cylindrical hole 3 a of the main shaft 3 and the storage portion 31 through the lid body 41.

FIG. 6 is a plan view showing the lid 41 and the closing plate 42.
As shown in FIGS. 4 and 6, the closing plate 42 is formed in a circular flat plate shape. The closing plate 42 is provided with a plurality of fins 42a. The plurality of fins 42 a are formed at equal intervals in the circumferential direction of the closing plate 42. The plurality of fins 42a are formed by cutting out a part of the closing plate 42 and further bending it. When the closing plate 42 is fixed to the concave portion 41 b of the lid body 41, the plurality of fins 42 a protrude in the direction opposite to the lid body 41.

  In addition, a plurality of air holes 42b are formed in the closing plate 42 by forming a plurality of fins 42a. The air flowing through the rotation of the plurality of fins 42a passes through the vent hole 42b.

  Further, a plurality of fixing holes 42 c through which the screw portions of the fixing bolts 52 are inserted are formed in the outer edge portion of the closing plate 42.

  In this example, the example in which the closing plate 42 is formed in a circular shape corresponding to the shape of the recess 41b has been described, but the shape of the closing plate 42 is not limited to this. The shape of the closing plate 42 may be formed in various other shapes such as a square or a hexagon. In this case, the recess 41 b formed in the lid 41 is set according to the shape of the closing plate 42.

  Furthermore, although the example which formed the some fin 42a by notching and bending a part of the closing board 42 was demonstrated, it is not limited to this. For example, the fin and the closing plate 42 may be configured by separate members, and the fin may be fixed to the closing plate 42 by a fixing method such as welding or fastening and fixing. In this case, it is necessary to form a vent hole in the vicinity of the portion where the fin is fixed on the closing plate.

  Note that the number of parts can be reduced by forming the plurality of fins 42a by notching a part of the closing plate 42 and further bending it as in this example. Furthermore, when forming the plurality of fins 42a, the air holes 42b can be formed at the same time.

  The second shielding member 43 b is interposed between the closing plate 42 and the recess 41 b in the lid body 41. The 2nd shielding member 43b is comprised by the net-like member similarly to the 1st shielding member 43a. Similar to the first shielding member 43a, the second shielding member 43b has a role as an electromagnetic shield that shields electromagnetic waves. In addition, the second shielding member 43 b prevents dust and dirt floating in the hoistway 100 from entering the storage unit 31 from the opening 41 a of the lid 41.

  Moreover, according to the hoisting machine 10 of this example, the recessed part 41b is formed in the cover body 41, and the closing plate 42 and the 2nd shielding member 43b are arrange | positioned in this recessed part 41b, The main shaft 3 in the hoisting machine 10 is arrange | positioned. The axial thickness can be reduced.

  In the hoisting machine 10 of this example, the recess 41b is formed in the lid 41, and the closing plate 42 and the second shielding member 43b are arranged in the recess 41b. However, the present invention is not limited to this. For example, the closing plate 42 and the second shielding member 43b may be fixed to one surface of the lid 41 so as to cover the opening 41a without providing the recess 41b in the lid 41.

Next, the rotation detector 9 will be described.
As shown in FIG. 4, the rotation detector 9 includes a detection unit 9a, a shaft unit 9b, a wiring 9c connected to the detection unit 9a, and a rotation plate (not shown).

  The detector 9a detects the rotational speed of the rotating plate by reading the pitch formed on the rotating plate. The detection unit 9 a is fixed to a storage unit 31 provided on the main shaft 3 via a flat fixing member 53. As the fixing member 53, for example, a plate spring is used. In addition, in order to reduce the contact area of the detection part 9a and the main axis | shaft 3, it is preferable that the fixing member 53 is a member with a thin width | variety. Thereby, the heat transmitted from the main shaft 3 to the detection unit 9a can be suppressed by the fixing member 53, and an increase in the temperature of the detection unit 9a can be suppressed.

  A shaft portion 9b is rotatably supported by the detection portion 9a. The shaft portion 9b is provided with a rotating plate (not shown). Further, the end of the shaft portion 9 b opposite to the detection portion 9 a is fixed to the joint shaft portion 41 c of the lid body 41. As described above, the lid body 41 is fixed to the bearing housing 21 provided in the sheave 5. Therefore, the shaft portion 9 b rotates together with the lid body 41 and the sheave 5.

  Note that, as described above, the fixing member 53 that fixes the detection unit 9a to the main shaft 3 is configured by an elastic leaf spring. Therefore, even if the vibration generated when the shaft portion 9b rotates is transmitted to the detection unit 9a, the vibration transmitted to the detection unit 9a by the fixing member 53 can be absorbed. Thereby, it can prevent that the malfunction occurs in the speed detection in the detection part 9a because the axial part 9b vibrates.

  The wiring 9c is connected to the detection unit 9a. The wiring 9c passes through the cylindrical hole 3a of the main shaft 3 and is drawn from the one end side in the axial direction of the main shaft 3 to the outside of the cylindrical hole 3a. Then, the wiring 9c transmits a signal detected by the detection unit 9a to the outside of the hoisting machine 10.

  Further, in the hoisting machine 10 of this example, the example in which the rotor block 4, the sheave 5 and the bearing housing 21 are integrally formed has been described, but the present invention is not limited to this. For example, the rotor block 4, the sheave 5 and the bearing housing 21 may be configured as separate members. Further, a bearing housing 21 may be provided in the rotor block 4 and the sheave 5 may be fixed to the rotor block 4.

2-1. Next, the operation of the hoisting machine 10 having the above-described configuration will be described.
When a current flows through the stator coil constituting the stator 7 fixed to the frame 2, the rotor block 4 facing the stator 7 is driven to rotate about the main shaft 3. Therefore, the sheave 5 coupled to the rotor block 4 via the connection portion 8 is also rotationally driven. And when the sheave 5 rotates, the rope 170 wound around the sheave 5 moves.

  Here, when the sheave 5 rotates, the cover body 41 and the closing plate 42 fixed to the bearing housing 21 of the sheave 5 rotate. As the closing plate 42 rotates, an air flow is generated by the plurality of fins 42 a formed on the closing plate 42. The rotation detector 9 can be cooled by this air flow. As a result, the rotation detector 9 can be cooled with a simple configuration.

  For example, when the car 110 is lifted, the second shielding member 43b, the opening 41a of the lid 41, the storage part 31, the cylindrical hole 3a of the main shaft 3, and the vent hole 42b formed in the closing plate 42, An air flow that passes through the first shielding member 43a is generated. Further, when the car 110 descends, the direction opposite to the above-described direction, that is, from the first shielding member 43a, the cylindrical hole 3a of the main shaft 3, the storage portion 31, the opening 41a, the second shielding member 43b, and the closing plate An air flow that passes through the vent holes 42b of the 42 occurs. As a result, the car 110 moves up and down, so that the air in the cylinder hole 3a of the main shaft 3 and the storage part 31 can be replaced with external air.

  Here, the 1st shielding member 43a and the 2nd shielding member 43b are formed in mesh shape. Therefore, the first shielding member 43a and the second shielding member 43b can block dust and dust, and allow only air to pass through the cylindrical hole 3a and the storage portion 31.

  Further, the storage portion 31 in which the rotation detector 9 is stored is formed on the sheave 5 side in the hoisting machine 10. As shown in FIG. 2, the sheave 5 is arranged toward the car 110 side that is opposite to the wall surface of the hoistway 100. The lid body 41 and the closing plate 42 that block the opening of the storage unit 31 are fixed to the car 110 side that is the opposite side of the wall surface of the hoistway 100 in the sheave 5. That is, since the rotation detector 9 is arranged on the inner space side of the hoistway 100, an operator who performs maintenance can easily access the rotation detector 9. As a result, the workability of the maintenance work for the rotation detector 9 can be improved.

  In addition, in the hoisting machine 10 of this example, the sheave 5 is arranged toward the inner space side of the hoistway 100, but is not limited thereto, and the sheave 5 is directed toward the wall surface of the hoistway 100. Also good. In this case, it is preferable that the storage portion for storing the rotation detector 9 is provided at the end of the main shaft 3 opposite to the sheave.

  However, in order to bring the rotation detector 9 and the fins 42a closer to each other and enhance the cooling effect, it is preferable to provide the storage portion 31 for storing the rotation detector 9 at the end portion on the sheave 5 side. At this time, the axial length of the shaft portion 9b in the rotation detector 9 can also be shortened. As a result, vibration generated by the rotation of the shaft portion 9b can be suppressed, and the rotation performance of the rotation detector 9 can be enhanced.

  Furthermore, according to the hoisting machine 10 of the present example, the lid body 41 in which the opening 41a is formed and the closing plate 42 that closes the opening 41a are configured as separate members. The fin 42 a is formed on the closing plate 42 that closes the opening 41 a of the lid 41, and is disposed outside the storage unit 31. Thereby, when inserting a hand from the opening part 41a of the cover body 41 and performing the maintenance of the rotation detector 9, the fin 42a does not interfere with the maintenance.

  In addition, the shape of the fin 42 a can be variously set without being affected by the shape of the opening 41 a of the lid 41 and the shape of the storage portion 31. Thereby, the fin 42a of a suitable shape can be provided at an appropriate location on the closing plate 42, and the cooling effect of the rotation detector 9 can be enhanced.

  Note that the closing plate 42 provided with the lid 41 and the fins 42a may be integrally formed. That is, the fins 42 a may be provided on the lid 41 that faces the storage portion 31.

  The present invention is not limited to the embodiment described above and shown in the drawings, and various modifications can be made without departing from the scope of the invention described in the claims.

  DESCRIPTION OF SYMBOLS 1 ... Elevator, 2 ... Frame, 3 ... Main shaft, 3a ... Tube hole, 4 ... Rotor block, 5 ... Sheave, 6 ... Brake mechanism, 7 ... Stator, 8 ... Connection part, 9 ... Rotation detector, 9a ... Detection part, 9b ... Shaft part, 9c ... Wiring, 10 ... Hoisting machine, 20 ... Magnet, 21 ... Bearing housing, 21a ... Through-hole, 22 ... Bearing, 24 ... Oil seal, 31 ... Storage part, 41 ... Lid 41a ... opening, 41b ... concave part, 41c ... joint shaft part, 42 ... closing plate, 42a ... fin, 42b ... vent hole, 100 ... hoistway, 110 ... car, 130 ... counterweight, 140, 150 ... Driven pulley, 170 ... rope

Claims (4)

In the hoisting machine in which the rope connected to the car is wound,
A housing provided with a stator;
A main shaft having a cylindrical hole attached to the housing and penetrating along the axial direction and a storage portion formed in the cylindrical hole;
A rotor block rotatably supported on the main shaft and having a magnet facing the stator;
A sheave provided on the rotor block and around which the rope is wound;
A rotation detector that is provided in the storage portion of the main shaft and has a shaft portion that detects rotation of the rotor block and the sheave and rotates together with the rotor block and the sheave;
A lid that is fixed to the shaft portion, covers the opening of the through hole into which the main shaft of the sheave or the rotor block is inserted and the opening of the cylindrical hole, and rotates together with the sheave and the rotor block;
A closing plate that is fixed to the lid and covers an opening formed in the lid, and has air holes and fins through which air passes;
Equipped with a,
The lid has a recess in which the closing plate is disposed,
The main shaft is provided with a shielding member that shields electromagnetic waves,
The said shielding member is arrange | positioned at the recessed part formed in the said cover body, The winding machine interposed between the said cover body and the said closing board . The hoisting machine according to claim 1, wherein the fin is formed by processing a part of the closing plate. One end of the main shaft in the axial direction is fitted to the housing,
The sheave is rotatably supported at the other axial end of the main shaft,
The storage portion is formed at the other end portion in the axial direction of the main shaft,
The hoist according to claim 1, wherein the lid and the closing plate are opposed to an opening on the other end side in the axial direction in the cylindrical hole of the storage portion and the main shaft. A car that goes up and down in the hoistway,
A counterweight coupled via the ride cage and rope;
A hoisting machine that raises and lowers the car by winding the rope;
The hoisting machine
A housing provided with a stator;
A main shaft having a cylindrical hole attached to the housing and penetrating along the axial direction and a storage portion formed in the cylindrical hole;
A rotor block rotatably supported on the main shaft and having a magnet facing the stator;
A sheave provided on the rotor block and around which the rope is wound;
A rotation detector that is provided in the storage portion of the main shaft and has a shaft portion that detects rotation of the rotor block and the sheave and rotates together with the rotor block and the sheave;
A lid that is fixed to the shaft portion, covers the opening of the through hole into which the main shaft of the sheave or the rotor block is inserted and the opening of the cylindrical hole, and rotates together with the sheave and the rotor block;
A closing plate that is fixed to the lid and covers an opening formed in the lid, and has air holes and fins through which air passes;
With
The lid has a recess in which the closing plate is disposed,
The main shaft is provided with a shielding member that shields electromagnetic waves,
The said shielding member is arrange | positioned at the recessed part formed in the said cover body, and is an elevator interposed between the said cover body and the said closing board .

Images