JP2011148587A - Rotation detecting device of elevator hoisting machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rotation detecting device of an elevator hoisting machine, easily installable in an existing elevator hoisting machine. <P>SOLUTION: A fixture 3 is fixed to a hoisting machine motor 1 by fastening the hoisting machine motor 1 from the outer periphery. A body support tool 12 is installed in the fixture 3 via pins 9 and 11 and blocks 8 and 10. The body support tool 12 includes first and second plates 13 and 14 and a plurality of thumbscrews 15 for connecting the first and second plates 13 and 14. A detecting device body 16 is supported by the second plate 14. The detecting device body 16 includes a detecting shaft 18 integrally rotating with a motor shaft 2. The detecting shaft 18 is connected to the motor shaft 2 via a rubber joint 19. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an elevator hoisting machine rotation detection device that detects the rotation of a motor shaft of a hoisting machine motor, and more particularly to an attachment structure for an elevator hoisting machine.

  A conventional rotation detection device for an elevator hoist includes a disk that rotates integrally with a motor shaft, and a pulse detector that generates a signal corresponding to the rotation of the disk. The disc is formed integrally with a rotating boss fitted to the shaft end of the motor shaft. The pulse detector is fixed to the outer wall of the motor with a screw (see, for example, Patent Document 1).

JP 2000-143130 A

  In recent years, the control of elevators has been remarkably advanced, and the signals of the rotation detection device important in the control have also evolved. For this reason, when reforming an elevator, it is desirable to use a rotation detection device that matches the latest control even when an existing hoisting machine is used. However, the shape of the fitting part of the motor shaft end and the mounting position of the pulse detector on the hoisting machine differ depending on the installation time. Therefore, in the conventional mounting structure, a new rotation detecting device is added to the existing hoisting machine. Can not be attached as it is, and additional processing to motors and equipment is often required.

  Thus, when additional processing is required, the customer's approval may not be obtained or there may be no work space at the site, so the rotation detection device may not be replaced. In addition, cutting oil or the like for additional processing may adhere to the equipment and impair quality. Furthermore, although there is a method using an attachment adapted to the shape of the fitting portion, it is necessary to manufacture various types of attachments, and there is a high possibility that the shaft is misaligned, and adjustment work is required. Furthermore, when a new rotation detecting device is attached by performing additional processing, there is a possibility that maintenance work or the like performed before the replacement cannot be performed.

  The present invention has been made to solve the above-described problems, and an object thereof is to obtain an elevator hoisting machine rotation detection device that can be easily attached to an existing elevator hoisting machine. To do.

  An elevator hoisting machine rotation detection device according to the present invention includes: a fixing tool fixed to the hoisting motor by tightening the hoisting motor from the outer periphery; a main body support attached to the fixing tool; and the hoisting motor. A detection shaft that is rotated integrally with a motor shaft that is a rotation shaft of the motor, is supported by a body support, and generates a signal corresponding to the rotation of the motor shaft, and is placed on the shaft end of the motor shaft. A cylindrical coupling portion coupled to the motor shaft is provided, and a joint that is fixed to the detection shaft and transmits the rotation of the motor shaft to the detection shaft is provided.

  In the elevator hoisting machine rotation detection device according to the present invention, the fixing device is fixed to the hoisting motor by tightening the hoisting motor from the outer periphery with the fixing tool, and the connection between the detection shaft and the motor shaft is performed. Since the coupling portion is put on the shaft end of the motor shaft, it can be easily attached to an existing elevator hoisting machine.

It is a side view which shows the rotation detection apparatus of the elevator hoisting machine by Embodiment 1 of this invention. It is a front view which shows the rotation detection apparatus of FIG. It is a perspective view which shows the state before connecting the coupling of FIG. 1 to a motor shaft. It is a perspective view which shows the state which connected the coupling of FIG. 3 to the motor shaft. FIG. 5 is a perspective view showing a state in which the joint of FIG. 3 is connected to a motor shaft of a type different from FIG. 4. It is a side view which shows the state which mounted | wore the handle for manual operation with the motor shaft of FIG. It is a side view which shows the rotation detection apparatus of the elevator hoisting machine by Embodiment 2 of this invention. It is a front view which shows the rotation detection apparatus of FIG. It is a perspective view which shows the 1st example of the coupling of the rotation detection apparatus by Embodiment 3 of this invention. It is a perspective view which shows the 2nd example of the coupling of the rotation detection apparatus by Embodiment 3 of this invention.

Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.
Embodiment 1 FIG.
1 is a side view showing a rotation detection device for an elevator hoist according to Embodiment 1 of the present invention, and FIG. 2 is a front view showing the rotation detection device of FIG. In the figure, a cylindrical hoist motor 1 has a motor shaft 2 that is a rotating shaft. The hoist motor 1 is installed such that the motor shaft 2 is horizontal.

  A fixing tool 3 is wound around and fixed to the outer peripheral portion of the hoist motor 1. The fixture 3 is a pair of a belt-like first clamp member 4, a belt-like second clamp member 5, and first and second clamp members 4, 5 that are fastened to the outer periphery of the hoist motor 1. Fasteners 6 and 7 are fixed to the hoisting machine motor 1 by tightening the hoisting machine motor 1 from the outer periphery.

  Intermediate portions of the first and second clamp members 4 and 5 are curved in a circular arc shape (semicircular shape) along the outer peripheral surface of the hoisting machine motor 1. The first clamp member 4 is applied to the upper half of the outer peripheral surface of the hoisting machine motor 1. The second clamp member 5 is applied to the lower half of the outer peripheral surface of the hoisting machine motor 1. Moreover, the one end parts of the 1st and 2nd clamp members 4 and 5 have mutually opposed. Similarly, the other end portions of the first and second clamp members 4 and 5 are also opposed to each other.

  The fastening tool 6 has a bolt that penetrates one end of the first and second clamp members 4 and 5 and a nut that is screwed to the bolt. The fastening tool 7 has a bolt that penetrates the other end portions of the first and second clamp members 4 and 5 and a nut that is screwed to the bolt.

  A first block 8 is fixed to an intermediate portion of the outer peripheral surface of the first clamp member 4. A first pin 9 passes through the first block 8. A second block 10 is fixed to an intermediate portion of the outer peripheral surface of the second clamp member 5. A second pin 11 passes through the second block 10.

  The first and second blocks 8 and 10 are arranged symmetrically about the motor shaft 2. The first and second pins 9 and 11 are arranged in parallel with the width direction of the hoisting machine motor 1 (left and right direction in FIG. 2).

  A main body support 12 is attached to the first and second pins 9 and 11. That is, the main body support 12 is attached to the fixture 3 via the pins 9 and 11 and the blocks 8 and 10. Further, the main body support 12 has a shape obtained by bending a belt-like flat plate into a U-shape (arch shape).

  Further, the body support 12 includes an L-shaped first plate 13 fixed to the first pin 9, an L-shaped second plate 14 fixed to the second pin 11, and the first and first And a plurality of thumb screws 15 as connecting means for connecting the two plates 13 and 14. The connecting portion between the first and second plates 13 and 14 is located above the motor shaft 2.

  The first plate 13 can be rotated about the first pin 9 by removing the thumbscrew 15. The second plate 14 can be rotated around the second pin 11 by removing the thumbscrew 15.

  The second plate 14 supports a detection device body 16 that generates a signal corresponding to the rotation of the motor shaft 2. The detector main body 16 is disposed at a position where the motor shaft 2 is extended in the axial direction. The detection device main body 16 is attached to the second plate 14 via a pair of upper and lower leaf springs 17. The leaf spring 17 is fixed to the second plate 14 and the detection device main body 16 by a plurality of screws.

  The detection device main body 16 includes a detection shaft 18 that is rotated integrally with the motor shaft 2 and a detector (for example, a pulse detector) that generates a signal corresponding to the rotation of the detection shaft 18. The detection shaft 18 is disposed coaxially with the motor shaft 2 and is connected to the motor shaft 2 via a joint 19. The rotation of the motor shaft 2 is transmitted to the detection shaft 18 through the joint 19. The second plate 14 is provided with an opening through which the detection shaft 18 and the joint 19 pass.

  3 is a perspective view showing a state before coupling the joint 19 of FIG. 1 to the motor shaft 2, and FIG. 4 is a perspective view showing a state of coupling the joint 19 of FIG. The joint 19 is made of rubber and has a cylindrical coupling portion 19 a that covers the shaft end of the motor shaft 2 and is coupled to the motor shaft 2. Further, the end of the joint 19 opposite to the coupling portion 19 a is fixed to the detection shaft 18.

  Since the torque acting on the joint 19 only rotates the detection shaft 18, the coupling portion 19a is thin. The coupling portion 19a is fastened with a band 20 wound around the outer peripheral portion thereof, so that the coupling portion 19a is fixed to a cylindrical portion where the key groove of the shaft end of the motor shaft 2 is not processed.

  3 and 4 show the case where the keyway is machined at the shaft end of the motor shaft 2, but for example, as shown in FIG. Usually, since the cylindrical portion exists at the base portion of the shaft end, the joint 19 can be fixed by the same method.

  The rotation detection device according to the first embodiment includes a fixture 3, blocks 8 and 10, pins 9 and 11, a main body support 12, a detection device main body 16, a leaf spring 17, a joint 19, and a band 20. The elevator hoisting machine has a hoisting machine motor 1, a rotation detecting device, a driving sheave rotated by the hoisting machine motor 1, and a hoisting machine brake that brakes the rotation of the driving sheave. Further, suspension means (rope or belt) for suspending the car is wound around the drive sheave.

  In the rotation detection device as described above, the rotation of the motor shaft 2 is normally transmitted to the detection shaft 18 through the joint 19 and a detection signal corresponding to the rotation of the motor shaft 2 is sent from the detection device main body 16 to the control panel. Is output. In the control panel, the car speed and the car position are detected based on the signal from the detection device main body 16, thereby controlling the operation of the elevator and monitoring the presence or absence of an abnormality.

  In an emergency or the like, it may be necessary to manually rotate the motor shaft 2 to move the car. FIG. 6 is a side view showing a state in which a handle 21 for manual operation is attached to the motor shaft 2 of FIG. When the handle 21 is mounted, the thumbscrew 15 is removed, and the first plate 13 is rotated to the upper part of the hoisting machine motor 1.

  Further, the band 20 is removed, the joint 19 is turned, and the second plate 14 is removed from the shaft end of the motor shaft 2 while rotating. Then, the second plate 14 is rotated as it is and hung from the lower part of the hoisting machine motor 1. As a result, the shaft end of the motor shaft 2 is exposed, and the handle 21 is attached to the shaft end. When returning, the rotation detecting device is returned to the original state in the reverse procedure.

  In such an elevator hoisting machine rotation detection device, the fixing device 3 is fixed to the hoisting motor 1 by tightening the hoisting motor 1 from the outer periphery with the fixing device 3, and the detection shaft 18 and the motor. The connection with the shaft 2 is performed by covering the shaft end of the motor shaft 2 with the coupling portion 19a of the joint 19, so that it is easy to add to the existing elevator hoisting machine without additional processing of the hoisting motor 1 or equipment. Can be attached. Further, the position adjustment of the rotation detecting device in the axial direction of the hoisting machine motor 1 can be easily performed.

  In addition, since the shaft end of the motor shaft 2 and the detection shaft 18 are connected by a rubber joint 19, it can be easily adapted to any shaft end type and can absorb misalignment. This eliminates the need for centering work.

  Furthermore, since the main body support 12 supporting the detection device main body 16 is divided into two plates 13 and 14 and can be individually turned, the detection device main body 16 can be easily detached from the shaft end of the motor shaft 2. Thus, the handle 21 can be quickly mounted in an emergency.

Embodiment 2. FIG.
7 is a side view showing a rotation detection device for an elevator hoist according to Embodiment 2 of the present invention, and FIG. 8 is a front view showing the rotation detection device in FIG. The fixture 22 according to the second embodiment includes a band 23 wound around the outer periphery of the hoist motor 1 and an adjusting mechanism 24 for adjusting the circumferential length of the wheel by the band 23.

  The adjusting mechanism 24 is provided with a bolt 25. When the bolt 25 is tightened, the band 23 is sent to shrink the wheel, and the hoist motor 1 is tightened. On the other hand, when the bolt 25 is loosened, the band 23 is returned, the wheel expands, and the fixing to the hoist motor 1 is released.

  The first and second blocks 8 and 10 can slide along the band 23. Thereby, even if the diameter of the ring of the band 23 changes, the first and second blocks 8 and 10 can be moved to a point-symmetrical position with respect to the center of the motor shaft 2. Other configurations are the same as those in the first embodiment.

  Even when such a fixing tool 22 is used, it can be easily attached to an existing elevator hoisting machine without performing additional processing on the hoisting machine motor 1 or equipment as in the first embodiment. it can.

Embodiment 3 FIG.
Next, a third embodiment of the present invention will be described. In the first and second embodiments, the common joint 19 is used regardless of the type of the shaft end of the motor shaft 2, but in the third embodiment, for example, as shown in FIGS. Appropriate joints 26 and 27 are used. That is, in the joint 26 of FIG. 9, the key part 26b fitted in the key groove at the shaft end is provided on the inner periphery of the coupling part 26a. Further, in the joint 27 of FIG. 10, the coupling portion 27a covering the shaft end has a cylindrical shape with a square cross section. Other configurations are the same as those in the first or second embodiment.

  By using such joints 26 and 27, when the same type of shaft end is used in many renovation sites, the band 20 can be omitted.

  DESCRIPTION OF SYMBOLS 1 Hoisting machine motor, 2 Motor shaft, 3,22 Fixing tool, 12 Main body support tool, 13 1st plate, 14 2nd plate, 15 Thumbscrew (connection means), 16 Detection apparatus main body, 18 Detection shaft, 19, 26, 27 Joint, 19a, 26a, 27a Coupling section, 23 bands, 24 adjustment mechanism.

Claims (4)

A fixing device fixed to the hoisting motor by tightening the hoisting motor from the outer periphery;
A body support attached to the fixture;
A detection device main body that has a detection shaft that is rotated integrally with a motor shaft that is a rotation shaft of the hoisting machine motor, is supported by the main body support, and generates a signal according to the rotation of the motor shaft; A cylindrical coupling portion that covers the shaft end of the motor shaft and is coupled to the motor shaft; and includes a joint that is fixed to the detection shaft and transmits the rotation of the motor shaft to the detection shaft. An elevator hoisting machine rotation detection device.   The rotation detection device for an elevator hoisting machine according to claim 1, wherein the joint is made of rubber. The main body support has first and second plates connected to the fixture at a point-symmetrical position about the motor shaft, and connecting means for connecting the first and second plates. And
The rotation of the elevator hoisting machine according to claim 1 or 2, wherein the first and second plates are rotatable with respect to the fixture by removing the connecting means. Detection device.   The said fixing tool has the band wound around the outer peripheral part of the said hoisting machine motor, and the adjustment mechanism for adjusting the circumferential length of the ring | wheel by the said band. The rotation detection apparatus for an elevator hoisting machine according to any one of items 1 to 3.

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