WO2016143110A1

WO2016143110A1 - Rope sheave

Info

Publication number: WO2016143110A1
Application number: PCT/JP2015/057266
Authority: WO
Inventors: 正北澤
Original assignee: 三菱電機株式会社
Priority date: 2015-03-12
Filing date: 2015-03-12
Publication date: 2016-09-15
Also published as: JPWO2016143110A1; JP6332548B2; CN107407395A; CN107407395B

Abstract

A rope sheave (10) comprises: a rotatably supported rotating shaft (22); a rope support member (8) which has a rope support groove annularly provided in the outer periphery thereof, has an inner peripheral surface provided at the center thereof and forming a first hole, and is disposed so that the rotating shaft is located in the first hole; a contact member (20) which protrudes in the diameter direction of the rotating shaft and which is provided to the rotating shaft in the centerline direction of the rotating shaft so as to be capable of being in contact with the rope support member; a mounting member (30) which has a second hole for allowing the rotating shaft to be fitted therein, has an outer peripheral surface engaged with the inner peripheral surface, and is provided while a gap is formed between the mounting member (30) and the contact member; and a pressing member (26) which is removably mounted to the rotating shaft or the contact member and which presses the mounting member in the centerline direction toward the contact member. The center of the annular rope support groove and the center of the first hole are located on the same straight line, the center of the outer peripheral surface and the center of the second hole are located on the same straight line, and the outer peripheral surface and the inner peripheral surface are tapered so that the diameters of the outer peripheral surface and the inner peripheral surface decrease in the direction toward the contact member.

Description

Sheave

The present invention relates to a sheave.

In a sheave of an elevator hoist, a leash member is provided on the outer periphery of the sheave. An annular groove is provided in the circumferential direction of the leash member, and a car is connected to a rope wound around the groove. As the maintenance of the sheave, for example, when the wear of the groove progresses due to contact with the rope, the leash member is replaced. For this reason, some sheaves are detachably attached to a rotating body that is rotated by a motor so that the sheaves can be exchanged together. An attachment part is provided in the rotating body, and an attachment hole part is provided in the sheave. Each of the attachment portion and the attachment hole portion is provided with a tapered surface and a flat surface connected to the outer peripheral side of the tapered surface. When the sheave is attached to the rotating body, the attachment hole portion is fitted into the attachment portion and fixed with a bolt. By aligning the tapered surfaces, the shaft center of the rotating body and the shaft center of the sheave are matched, and the sheave is fixed to the rotating body by fastening bolts at locations where the respective planes are aligned. . (See Patent Document 1)

JP 2008-74590 A

By the way, when the mounting hole portion is mounted on the mounting portion, the respective tapered surfaces are in close contact with each other, and in order for the respective flat surfaces to be in close contact with each other, the mounting hole portion and the mounting portion are processed with extremely high dimensional accuracy. It is necessary to keep it. If the tapered surfaces are in close contact with each other and a gap is formed between the planes, the plane on the sheave side is inclined and fixed toward the plane of the rotating body due to the fastening force of the bolts. That is, the outer peripheral portion of the sheave is fixed while being inclined toward the rotating body. Conversely, when a gap is formed between the tapered surfaces and the flat surfaces are in close contact with each other, the axis of the rotating body and the axis of the sheave are displaced. In either case, the ride comfort of the elevator becomes worse. When assembling a rotating body and a sheave at a factory, dimensional accuracy can be improved by repeating temporary assembly and additional processing, but it takes time. When exchanging sheaves at the elevator installation site, temporary assembly and additional processing cannot be repeated, so the dimensional accuracy of the sheaves deteriorates.

The present invention has been made to solve such a problem, and an object of the present invention is to obtain a sheave that can be easily manufactured and maintained and has high dimensional accuracy.

The sheave according to the present invention includes a rotating shaft that is rotatably supported, a rope-hanging groove that is annularly provided on the outer periphery, an inner peripheral surface that forms a first hole is provided in the center, and an inner side of the first hole. And a contact member provided on the rotation shaft so as to protrude in the diameter direction of the rotation shaft and to be able to contact the rope connection member in the center line direction of the rotation shaft, It has a second hole in which the rotating shaft is fitted, the outer peripheral surface is aligned with the inner peripheral surface, and is attached to the rotating shaft or the abutting member so as to be detachably attached to the abutting member. And a pressing member that pushes the attachment member toward the abutting member in the direction of the center line, and the center of the annular leash groove and the center of the first hole are formed on the same straight line, The center and the center of the second hole are formed on the same straight line, and the outer peripheral surface and the inner peripheral surface become smaller in diameter as they approach the contact member. It is tapered for Kunar.

According to the present invention, the leash member is brought into contact with the abutment member, the second hole of the attachment member is fitted to the rotation shaft, the outer peripheral surface of the attachment member and the inner peripheral surface of the leash member are aligned, It attaches to a rotating shaft or a contact member, and pushes an attachment member toward a contact member toward a center line direction. As a result, the center of the outer peripheral surface and the inner peripheral surface, which are formed in a tapered shape so that the diameter becomes smaller as they approach the abutting member, come on the center line of the rotating shaft, and the center of the annular leash groove rotates. Come on the axis centerline. When the push member is removed, the leash member can be removed from the rotating shaft and replaced.

According to the present invention, it is possible to obtain a sheave that can be easily manufactured and maintained and has high dimensional accuracy.

1 is an overall configuration diagram illustrating an elevator according to Embodiment 1 of the present invention. It is sectional drawing which shows the whole elevator hoisting machine by arrow II-II shown in FIG. It is an enlarged view which shows the principal part of the elevator hoisting machine cross section of FIG. It is a front view which shows the sheave of the elevator hoisting machine by the arrow III shown in FIG. FIG. 5 is a cross-sectional view taken along arrows IV-IV in FIG. 4. It is a front view which shows the sheave of the elevator hoisting machine by Embodiment 2 of this invention. (A) is sectional drawing which shows arrow VV of FIG. 6, (b) is sectional drawing which shows arrow VI-VI of FIG.

Embodiment 1 FIG.
An embodiment of the present invention will be described with reference to FIGS. FIG. 1 is an overall configuration diagram showing an elevator according to Embodiment 1 of the present invention, and FIG. 2 is a sectional view showing an overall configuration of an elevator hoisting machine shown in FIG. 3 is an enlarged view showing a main part of the cross section of the elevator hoisting machine shown in FIG. 2, FIG. 4 is a front view showing the sheave of the elevator hoisting machine as viewed in the direction of the arrow III shown in FIG. FIG. 4 is a cross-sectional view showing view IV-IV in FIG.

In FIG. 1, a car 2 and a counterweight 3 are provided in a hoistway 1 so as to be able to go up and down. A machine room 4 in which a hoisting machine 7 is installed is provided in the upper part of the hoistway 1. The hoisting machine 7 is rotatably provided with a sheave 10. A deflecting wheel 9 is provided adjacent to the hoisting machine 7. The rope 24 is wound around the sheave 10 and the baffle 9 and then lowered to the hoistway 1 from the hole in the floor of the machine room 4, and the car 2 and the counterweight 3 are connected to both ends.

In FIG. 2, the hoisting machine 7 is provided with a cylindrical frame 12 having one end opened and a wall 11 at the other end. A cylindrical stator 15 around which a coil is wound is provided on the inner periphery of the frame body 12. A fixed body 13 is provided so as to protrude from the wall 11 to the inner peripheral side of the stator 15. A fixed shaft 14 is provided so as to protrude from the fixed body 13 in the direction of the center line of rotation of the sheave 10. The fixed shaft 14 protrudes from the opened frame 12.

A cylindrical rotor 16 is provided on the inner peripheral side of the stator 15 so as to face the stator 15. A plurality of permanent magnets 18 are arranged at equal intervals on the outer circumferential surface of the rotor 16 facing the stator 15. When the coil is energized, the rotor 16 rotates. A fixed body 13 is located on the inner peripheral side of the rotor 16, and a pair of brakes 19 are provided on the fixed body 13. The inner peripheral surface of the rotor 16 is a braking surface, and the rotor 16 is braked when the friction material of the brake 19 is pressed against the braking surface.

The rotor 16 is provided with a cylindrical contact member 20 so as to protrude from the opened frame 12 in the center line direction. The front end surface 20a of the contact member 20 is a flat surface provided in a direction orthogonal to the center line. A rotating shaft 22 is provided so as to protrude in the center line direction from the center portion of the distal end surface 20a. The rotor 16, the abutting member 20, and the rotating shaft 22 are integrally formed, supported by the fixed shaft 14 via the bearing 17, and rotated about the center line of the fixed shaft 14.

2, 3, and 4, a leash member 8 that rotates together with the rotating shaft 22 is disposed on the outer peripheral side of the rotating shaft 22. The leash member 8 includes a hollow cylinder 5 and a hollow disk 6 provided in a film shape in the center of the inner peripheral surface of the cylinder 5. The cylinder 5 constitutes the rim of the sheave 10, and the disc 6 constitutes the spoke of the sheave 10. On the outer peripheral portion of the cylinder 5, an annular rope hooking groove 8 a that makes one round in the circumferential direction is provided. A plurality of ropes 8a are provided side by side in the direction of the rotation center line. Although not shown in FIGS. 2, 3 and 4, the rope 24 is wound around each of the rope hanging grooves 8 a.

The disc 6 is in contact with the contact member 20 in the direction of the center line of rotation. A first hole 6 a is provided in the center of the disc 6 so as to penetrate in the center line direction. The edge of the first hole 6a, that is, the inner peripheral surface 6b of the disk 6 forming the first hole 6a is formed in a taper shape so that the diameter becomes smaller as it approaches the contact member 20 in the center line direction. ing. The annular leash groove 8a is formed such that the center line of rotation coincides with the center line of the first hole 6a. As a manufacturing method of the leash member 8, for example, the material of the leash member 8 is attached to a machine tool, and the leash groove 8a and the first hole 6a are continuously processed. Thereby, the rope hanging groove 8a is easily formed so that the center line of rotation coincides with the center line of the first hole 6a.

An attachment member 30 is provided in contact with the inner peripheral surface 6b. The attachment member 30 is formed in a disk shape. The attachment member 30 is rotated together with the rotation shaft 22. A second hole 30a is provided in the center of the attachment member 30 so as to penetrate in the center line direction. The rotary shaft 22 is fitted in the second hole 30a. The outer peripheral surface 30b of the attachment member 30 is formed in a taper shape so that the diameter becomes smaller as it approaches the contact member 20 in the center line direction. The outer peripheral surface 30b is formed such that the center line of rotation coincides with the center line of the second hole 30a. As a manufacturing method of the attachment member 30, for example, the material of the attachment member 30 is attached to a machine tool, and the outer peripheral surface 30b and the second hole 30a are continuously processed. Thereby, the outer peripheral surface 30b is easily formed such that the center line of rotation coincides with the center line of the second hole 30a.

The outer peripheral surface 30b of the attachment member 30 and the inner peripheral surface 6b of the leash member 8 are formed in a tapered shape in the same direction and matched. The dimensions of the outer peripheral surface 30b and the inner peripheral surface 6b are set so that there is a gap in the center line direction between the mounting member 30 and the contact member 20 in a state where the outer peripheral surface 30b and the inner peripheral surface 6b are in contact with each other. ing. The mounting member 30 is pushed toward the contact member 20 in the center line direction by a plurality of bolts 26 as push members. The attachment member 30 presses the flat surface 6 c of the disk 6 against the tip surface 20 a of the contact member 20. The bolt 26 passes through the attachment member 30 and is screwed into the contact member 20. Since the outer peripheral surface 30b and the inner peripheral surface 6b that are tapered in the same direction are pressed against each other, the outer peripheral surface 30b and the inner peripheral surface when the attachment member 30 and the leash member 8 are rotated. The center lines of rotation of 6b are coincident.

The mounting member 30 is fitted with the rotation shaft 22 in the second hole 30a, and is pushed toward the contact member 20 by the bolt 26. The outer peripheral surface 30b is pressed against the inner peripheral surface 6b of the leash member 8, and the contact member 20 is fixed in a state where a gap is opened. The attachment member 30 is pushed toward the first hole 6a, whose diameter decreases in a tapered manner. For this reason, the attachment member 30 receives a force compressed toward the center side in the diameter direction, the diameter of the second hole 30a is contracted, and the attachment member 30 is pressed against the rotating shaft 22. Thereby, the rotation center line of the rotating shaft 22 and the outer peripheral surface 30b of the attachment member 30 coincide. In this way, the rope centering grooves 8a and the inner peripheral surface 6b, the inner peripheral surface 6b and the outer peripheral surface 30b, the outer peripheral surface 30b and the rotary shaft 22, and the respective rotation center lines coincide. Accordingly, when the leash member 8 is rotated together with the rotation shaft 22, the rotation center line of the leash groove 8 a coincides with the rotation center line of the rotation shaft 22.

Thus, the disk 6 is fixed to the contact member 20 by the plurality of bolts 25 tightened in the direction of the center line in a state where the center lines of rotation coincide with each other. The flat surface 6 c of the disk 6 facing the contact member 20 is pressed against the tip surface 20 a of the contact member 20. As a result, the position of the leash hanging groove 8a in the center line direction can be determined with high accuracy. Even if the rope 24 is wound and a large load is applied, the leash member 8 does not tilt, and the position of the leash groove 8a in the center line direction is maintained with high accuracy.

4 and 5, the disc 6 of the leash member 8 is provided with a through-hole 6 f penetrating in the center line direction. A screw hole 6d is formed up to the middle of the through hole 6f so that the bolt 27 can be screwed in as a pressing means, and the remainder is a circular through hole 6e having a diameter smaller than the inner diameter of the screw hole 6d. The through hole 6 e is provided at a position facing the contact member 20. The contact member 20 at a position facing the through hole 6e is provided with a hole 20a in the center line direction. A round bar-like protruding member 31 is fitted in the hole 20a. The diameter of the protruding member 31 is smaller than the diameter of the through hole 6e. The protruding member 31 protrudes in the direction of the center line into the through hole 6e. A first flat surface 31 a that is inclined along the direction of rotation of the leash member 8 is provided at the tip of the protruding member 31.

A round bar-shaped contact member 32 that is in contact with the first flat surface 31 a of the protruding member 31 and extends in the center line direction is disposed. The contact member 32 is provided with a second plane 32a combined with the first plane 31a. The diameter of the contact member 32 is smaller than the diameter of the through hole 6e. The length of the contact member 32 in the center line direction is provided so as to be located from the screw hole 6d to the through hole 6e. When the bolt 27 is screwed into the screw hole 6d, the first plane 31a is inclined along the rotation direction, so that the contact member 32 having a diameter smaller than that of the through hole 6e is rotated along the first plane 31a. Move to. Then, the contact member 32 comes into contact with one side of the inner surface of the through hole 6e in the rotational direction facing the first flat surface 31a. The protruding member 31 contacts the other side of the inner surface of the through hole 6e. Since the bolt 27 cannot be screwed beyond this position, the bolt 27 is fastened with a lock nut 33 so as not to loosen in this state.

The contact member 32 abuts on one side in the rotational direction of the inner surface of the through hole 6e, and the projecting member 31 abuts on the other side. For this reason, even if the leash member 8 rotates in either direction when the hoisting machine 7 is operated, the torque acting on the leash member 8 is received by the protruding member 31 and the contact member 32. Thereby, the leash member 8 does not shift with respect to the abutment member 20 and the rotary shaft 22, and the position accuracy of the leash groove 8a does not deteriorate.

The assembly and disassembly of the sheave 10 configured as described above will be described. The protruding member 31 is fitted into the hole 20 a of the contact member 20. The disc 6 of the leash member 8 is brought into contact with the contact member 20 so that the protruding portion of the protruding member 31 enters the through hole 6e. The bolt 25 is loosely tightened to temporarily fix the leash member 8 to the contact member 20. The contact member 32 is inserted into the through hole 6e so that the first plane 31a and the second plane 32a are aligned, and the bolt 27 is screwed. If the contact member 32 and the projecting member 31 come into contact with the inner surface of the through hole 6e, the bolt 27 cannot be screwed in. Therefore, the bolt 27 is loosely tightened at this position.

The second hole 30 a of the attachment member 30 is fitted to the rotation shaft 22, and the inner peripheral surface 6 b of the leash member 8 and the outer peripheral surface 30 b of the attachment member 30 are brought together. The bolt 26 is tightened to push the attachment member 30 toward the contact member 20. Thereafter, the bolt 25, the bolt 27, and the lock nut 33 are tightened to fix the leash member 8 to the contact member 20. The sheave 10 can be disassembled by removing the bolt 25, bolt 26, bolt 27, and lock nut 33, and removing the leash member 8 from the contact member 20 and the rotary shaft 22.

In the sheave 10 assembled in this manner, the center line of rotation of the leash hanging groove 8 a coincides with the center line of rotation of the rotating shaft 22. Further, the position of the leash hanging groove 8a in the center line direction can be determined with high accuracy. Even if the rope 24 is wound and a large load is applied, the leash member 8 does not tilt, and the position of the leash groove 8a in the center line direction is maintained with high accuracy. Further, even if the hoisting machine 7 is operated and torque is applied to the leash member 8, the leash member 8 does not shift with respect to the contact member 20 and the rotary shaft 22, and the position accuracy of the leash groove 8a is improved. There will be no worse.

Since the sheave 10 with good dimensional accuracy can be assembled and disassembled using the bolt 25, the bolt 26, the bolt 27, and the lock nut 33 in this way, the sheave 10 can be easily manufactured and maintained and has good dimensional accuracy. be able to.

Also, for example, in order to align the center line of rotation of the sheave and the rotating shaft, there is a type that shrink-fits the hole and the rotating shaft of the sheave. In this case, the sheave and the rotating shaft are installed in a factory equipped with shrink fitting. Need to be assembled. According to the present embodiment, by pressing the mounting member 30 toward the abutting member 20 with the bolt 26, the second hole 30a is pressed against the rotating shaft 22, so no shrink fitting equipment is required, and the elevator installation site Thus, the rope member 8 can be replaced.

Moreover, in order to receive the torque which acts on a sheave with the driving | operation of a winding machine, there exist some which fix a sheave and a rotating shaft with a reamer pin, for example. When exchanging the sheave, a reamer hole is required after assembling the new sheave and the rotating shaft, which is troublesome. According to the present embodiment, the projecting member 31 and the contact member 32 that receive torque can be easily attached by the bolt 27 and the lock nut 33.

In the present embodiment, the case where the mounting member 30 is pushed toward the contact member 20 by the bolt 26 as the push member has been described, but a plate-like member may be used as the push member. The mounting member 30 may be pushed toward the contact member 20 by applying the plate-shaped member to the contact member 20 and tightening the plate-shaped member to the rotating shaft 22 with a bolt.

Embodiment 2. FIG.
In the first embodiment, the case where a set of means for receiving torque acting on the leash member 8 when the hoisting machine 7 is operated is described. However, in the present embodiment, the case where two sets are provided is described. To do. Note that components having the same reference numerals as in the other embodiments show the same parts in the present embodiment, and description thereof is omitted.

FIG. 6 is a front view showing a sheave of an elevator hoist according to Embodiment 2 of the present invention. 7A is a cross-sectional view showing the arrow VV in FIG. 6, and FIG. 7B is a cross-sectional view showing the arrow VI-VI in FIG. 6 and 7, means for receiving torque acting on the leash member 58 are provided at two locations along the rotation direction of the leash member 58. Although not shown in the figure, an annular rope hook groove 58a is provided in the circumferential direction on the outer periphery of the rope hook member 58.

7A and 7B, the first flat surfaces 31a are inclined in opposite directions along the rotation direction of the leash member 58. The contact member 32 is in contact with the inner surface of each through hole 56e, and the protruding member 31 is not in contact with the inner surface of the through hole 56e. The contact member 32 is in contact with the inner surface of the through hole 56e on the side facing the first flat surface 31a. That is, each contact member 32 is in contact with the inner surface of the through hole 56e at positions opposite to each other along the rotation direction of the leash member 58.

In the sheave 50 configured as described above, torque that acts on the leash member 58 is received by any one of the contact members 32 according to the rotation direction of the leash member 58. Thereby, the leash member 58 does not shift with respect to the abutment member 60, and the position accuracy of the leash groove 58a does not deteriorate.

In the second embodiment, the case where two sets of means for receiving torque acting on the leash member 8 are provided has been described. A plurality of pairs can be provided as a pair. In the configuration of the first embodiment, the means for receiving torque cannot be increased in this way, but in the configuration of the second embodiment, it can be increased.

For example, if the configuration of Embodiment 1 is provided at two locations, the pitch between the two protruding members 31 and the pitch between the two through-holes 6e need to be matched, making it difficult to manufacture. On the other hand, in the configuration of the second embodiment, even if the pitch between the two protruding members 31 and the pitch between the two through holes 56e are deviated due to a manufacturing error, it can be easily absorbed because the position of the contact member 32 is deviated. Can be manufactured.

Moreover, although

Embodiment

1 and 2 demonstrated in the case of the sheave of the elevator hoisting machine, you may apply to the sheave and pulley used for another apparatus.

Claims

A rotating shaft rotatably supported;
A leash hanging member which is provided so that an outer circumferential ring is provided with an annular outer periphery, an inner peripheral surface forming a first hole is provided in a central portion, and the rotation shaft is positioned inside the first hole;
A contact member that protrudes in the diameter direction of the rotation shaft and is provided on the rotation shaft so as to be able to contact the leash member in the center line direction of the rotation shaft;
A mounting member provided with a second hole into which the rotating shaft is fitted, an outer peripheral surface being aligned with the inner peripheral surface, and a gap between the contact member;
A pressing member that is detachably attached to the rotating shaft or the contact member, and that pushes the attachment member toward the contact member in the center line direction,
The center of the ring-shaped leash groove and the center of the first hole are formed on the same straight line, the center of the outer peripheral surface and the center of the second hole are formed on the same straight line, and the outer peripheral surface and the The sheave according to claim 1, wherein the inner peripheral surface is formed in a tapered shape so that the diameter decreases as the contact member approaches.
The leash member has a through-hole penetrating in the center line direction,
A projecting member provided on the abutting member so as to project into the through-hole in the direction of the center line, and having a first plane inclined on the distal end side along the rotational direction of the rotating shaft;
A contact member having a second plane combined with the first plane and disposed in the through hole;
A pressing means for pressing the contact member toward the protruding member;
The sheave according to claim 1, further comprising:
Two combinations of the through hole, the protruding member, the contact member, and the pressing means
The sheave according to claim 2, wherein the first planes of the respective combinations are inclined in opposite directions along the rotation direction.
The sheave according to claim 3, wherein a plurality of the pairs are provided with two sets of the combinations as a pair.