JP2009007138A - Pulley device of elevator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pulley device of an elevator with space-saved brake device which is changeable irrespective of the support structure of an existing drive pulley and in which an extension shaft must not be joined or the space is not increased. <P>SOLUTION: This pulley device of an elevator comprises: the drive pulley 1 rotatably installed on a base body 20, having a rope groove 13 in the outer peripheral surface, having a braking surface 14 on the inner peripheral surface or on the inner part of the inner peripheral surface, and having an inner tubular part 11 at the center part; a support member 5 rotatably supported on the inner tubular part of the drive pulley and restricted to rotate relative to the base body; and a braking mechanism secured to the support member and advancing and retreating a braking piece relative to the braking surface. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an elevator sheave device, and more particularly to a sheave device that is preferably used for adding a brake to an existing drive machine and that has a built-in brake useful as an ordinary hoisting machine.

  Recently, a plurality of brake devices are required to improve safety when the cage moves upward. Replacing an existing drive machine with a drive machine having a plurality of brakes has a problem of a carry-in / out route from an existing machine room and a problem of a construction period. Therefore, there is a demand for a method and structure in which additional braking devices can be easily attached and installation time is short. As a brake that can be additionally attached in the conventional field, an output shaft extension is attached to the output shaft and the sheave, thereby forming a rotation extension. This rotational extension is connected to the central hub of the brake assembly. Some brake assemblies are supported by a torque arm fixed to a bed plate (see, for example, Patent Document 1).

JP-A-5-238663 (first page, FIG. 1)

  The conventional elevator sheave device as described above has a structure in which an extension shaft is attached to an existing drive sheave and a brake device is attached to the extension shaft. Since this structure requires the extension shaft to be joined to the output shaft or sheave, there is a problem that the extension shaft cannot be attached and the brake cannot be added in the drive machine in which the output shaft is supported at both ends. . In addition, since the brake device is arranged by extending the output shaft, there is a problem that it cannot be mounted unless a space for arranging the brake device is secured in the vicinity of the drive device.

  The present invention has been made in order to solve the above-described problems of the prior art, and can be replaced regardless of the existing drive sheave support structure without joining the extension shaft or increasing the space. An object of the present invention is to provide an elevator sheave device with a space-saving brake device.

  The elevator sheave device according to the present invention is provided so as to be rotatable with respect to the base body, has a rope groove on the outer peripheral surface, has a braking surface on the inner peripheral surface or an inner side of the inner peripheral surface, and has an inner portion in the center. A driving sheave having a cylindrical portion, a support member that is rotatably supported with respect to the inner cylindrical portion of the driving sheave, and whose rotation is restricted with respect to the base; and a braking surface that is fixed with respect to the supporting member And a braking mechanism for moving the braking piece forward and backward.

  In the present invention, a drive sheave having a rope groove on the outer peripheral surface and an inner peripheral surface or a braking surface on the inner side of the inner peripheral surface is used to rotate with respect to the inner cylindrical portion of the drive sheave. Since there is provided a support member that is freely supported and whose rotation is restricted with respect to the base body, and a braking mechanism that is fixed to the support member and moves the braking piece back and forth with respect to the braking surface, an existing drive is provided. It can be replaced regardless of the support structure of the sheave, and the extension shaft is not joined or the space is not particularly increased. For this reason, it is possible to add a brake device to an existing drive machine simply by replacing the sheave.

Embodiment 1 FIG.
1 to 3 are diagrams for explaining an elevator sheave device according to Embodiment 1 of the present invention, and FIG. 1 is an exchange of the sheave device according to Embodiment 1 for a drive sheave of an existing drive machine. It is a figure which shows a state, (a) is principal part sectional front view, (b) is principal part sectional drawing which shows the structure of the seal part enclosed with the circle | round | yen A of Fig.1 (a), (c) is a modification of a seal part It is principal part sectional drawing which shows these. 2 is a side view of the driving machine shown in FIG. 1, and FIG. 3 is a partially cutaway side view showing the internal structure of the sheave device shown in FIG. The first embodiment is applied to a type in which a shaft on which a driving sheave is mounted rotates. In the figure, the drive sheave 1 is formed in a bowl shape having a bowl shape or an outer cylinder portion around it, and has an inner cylinder portion (a boss portion in this example) 11 at the center portion and an outer cylinder portion 12 at the outer side portion. A rope groove 13 is formed on the outer peripheral surface of the outer cylindrical portion 12, and a braking surface 14 is formed on the inner peripheral surface of the outer cylindrical portion 12. The output shaft 21 of the existing driving machine 2 is penetrated and fitted into the inner cylinder portion 11, and the inner peripheral surface 11 a of the inner cylinder portion 11 serves as a coupling portion with respect to the output shaft 21. The drive sheave 1 is provided so as to be rotatable with respect to the base 20 of the drive machine 2 as described above.

  A space on the right side in FIG. 1 of the drive sheave 1 is rotatably supported via the bearing 3 with respect to the outer peripheral surface 11 b of the inner cylinder portion 11, and accommodates the braking mechanism 4 between the drive sheave 1. And a substantially donut-shaped support member 5 for fixing and supporting the braking mechanism 4 is provided so as to cover the outer cylinder portion 12. As shown in FIG. 2, the support member 5 has locking members (51) 51a and 51b which are two block-shaped stoppers that interfere with the side surfaces 20a and 20b of the base body 20 in the rotational direction. The rotation is restricted in any direction. The locking members 51a and 51b are fixed to the outer surface of the support member 5 by a plurality of bolts 52, respectively.

  In this example, two sets of braking mechanisms 4 are provided symmetrically with respect to the driving sheave 1, and two electromagnet mechanisms 41 (41 a, 41 b) fixed to a mounting seat 53 integrally formed with the support member 5, respectively. The two brake pieces 6 (6a, 6b) are constituted by two operation pieces 42 (42a, 42b) for moving forward and backward with respect to the braking surface 14, respectively, and two brake springs 43 (43a, 43b). The operating piece 42 is disposed opposite to the electromagnet mechanism 41, the braking spring 43 is disposed between the operating piece 42 and the electromagnet mechanism 41, and the braking piece 6 is fixed to the operating piece 42. An inspection hole 54 and an inspection hole lid 55 that closes the inspection hole 54 are provided at positions corresponding to the electromagnet mechanism 4 and the brake piece 6 in the support member 5.

  A seal 31 is provided on one side of the bearing 3 that supports the support member 5 (left side in FIG. 1A), and a bearing lid 32 is provided on the other side. A sealing means 7 as shown in FIG. 1B and FIG. FIG. 1B shows a case where the labyrinth seal 71 is used. The labyrinth seal 71 is, for example, provided with a void in a maze shape on the opposing surface where the inner peripheral surface portion of the outer cylindrical portion 12 of the drive sheave 1 and the outer peripheral surface portion of the support member 5 are close to each other. Further, FIG. 1C schematically shows a case where a hermetic seal 72 such as an oil seal is used. The sheave device 10 according to the first embodiment includes the drive sheave 1, the bearing 3, the braking mechanism 4, the support member 5, the locking member 51, the braking piece 6, and the like. The control circuit of the electromagnet mechanism 41 is not shown. Further, the existing drive machine 2 is provided with a drive motor 22 for rotating the output shaft 21, a brake drum 23a, an electromagnet mechanism 23b for an existing brake, a brake arm 23c, and the like.

  Next, the operation of the first embodiment configured as described above will be described. In the sheave device 10 configured as described above, when the drive sheave 1 is braked, the braking springs 43a and 43b between the electromagnet mechanisms 41a and 41b of the built-in braking mechanism 4 and the operating pieces 42a and 42b. The braking force is obtained by pressing the braking pieces 6a, 6b against the braking surface 14 via the operating pieces 42a, 42b by the spring force of. When rotating, the electromagnet mechanisms 41a and 41b of the brake mechanism 4 are energized to attract the operating pieces 42a and 42b in the direction of the electromagnet mechanisms 41a and 41b, and the braking pieces 6a fixed to the operating pieces 42a and 42b. The drive sheave 1 rotates by rotating the output shaft 21 by the motor 22 at the same time as obtaining a gap between 6b and the braking surface 14.

  In addition, since the supporting member 5 is latched with respect to the base | substrate 20 by the latching member 51 (51a, 51b), even if the drive sheave 1 rotates, it does not rotate. Further, since the sealing means 7 is provided, it is possible to prevent dust and lubricating oil from entering the inside of the braking mechanism 4 and the braking surface 14 from the outside. When the brake mechanism 4 or the brake piece 6 is inspected, inspection and maintenance are performed by opening the inspection hole lid 55. On the other hand, when a brake device is added to an existing hoisting machine (not shown) in which a brake sheave is not attached to the drive sheave, the drive sheave is shown in FIG. By replacing the sheave device 10 with the braking mechanism 4 built-in, the addition of the mechanical portion of the brake device is completed.

  As described above, according to the first embodiment, since the braking mechanism 4 is arranged on the inner side of the drive sheave 1, the space is saved, and when adding a brake device, the extension shaft can be joined or the space can be reduced. Without any particular increase, it is possible to add a brake device to an existing drive by simply replacing the drive sheave. Further, since the braking mechanism 4 is located away from the direction in which the rope oil scatters, the rope oil can be prevented from adhering to the braking surface 14, and the sealing means 7 is provided, so that the rope oil can be more reliably entered. It can be prevented. Further, the support member 5 is rotatably provided on the inner cylindrical portion (boss portion) 11 of the drive sheave 1, and the locking members 51 a and 51 b for stopping the rotation are provided with respect to the side surface portions 20 a and 20 b of the existing base 20. Since the projections are provided so as to interfere with each other in the rotation direction, it is possible to easily replace the sheave device 10 having the braking mechanism 4 without requiring the installation of the support member 5 on the main body of the driving machine 2.

  In addition, the braking pieces 6a and 6b are arranged at two places on both sides symmetrically with respect to the rotational center of the driving sheave 1, so that the braking mechanism 4 is provided by effectively using the space on the inner peripheral side of the driving sheave 1. The braking mechanism can be reduced in size. Furthermore, the support member 5 can suppress the entry of dust or oil from the sheave into the space that accommodates the braking mechanism 4 by providing the sealing means 7 facing the inner peripheral surface of the drive sheave 1. A highly reliable elevator hoisting machine can be obtained. Furthermore, by providing the support member 5 with the inspection hole 54 of the brake mechanism 4, the brake mechanism 4 and the brake piece 6 can be easily inspected from the outside, and the maintainability is improved. Further, since the driving sheave 1 and the braking mechanism 4 are integrated, when the braking mechanism 4 is additionally attached, the position adjustment work of the driving sheave 1 and the braking mechanism 4 is unnecessary, and the braking surface 14 at the time of shipment is not necessary. Since the positional relationship between the brake piece 6 and the brake piece 6 is maintained, the on-site sliding operation is unnecessary, and the installation time can be shortened.

Embodiment 2. FIG.
4 to 6 illustrate an elevator sheave device according to Embodiment 2 of the present invention, and FIG. 4 shows a replacement of the sheave device of Embodiment 2 with a drive sheave of an existing drive machine. FIG. 5A is a cross-sectional front view of a main part, and FIG. 4B is a cross-sectional view of a main part showing details in the vicinity of the bearing of FIG. 5 is a side view of the drive machine shown in FIG. 4, and FIG. 6 is a partially cutaway side view showing the internal structure of the sheave device shown in FIG. In each figure, the same numerals indicate the same or corresponding parts. In the first embodiment, the case where the driving sheave 1 is used in a driving machine (winding machine) that is fitted to the output shaft 21 and rotates together is illustrated, but in the second embodiment, the shaft is fixed. It is an example at the time of using for the drive machine of the structure currently made. In the figure, the existing driving machine 2 includes an output boss 26 that is rotatably supported by a bearing 25 with respect to a support shaft 24, and the driving sheave 1 </ b> A according to the second embodiment is connected to the output boss 26 by a bolt 261. The structure is fastened and rotates around the support shaft 24 together with the output boss 26.

  The driving sheave 1A is formed with an inner cylinder portion 11A having a flange portion for fixing to the output boss 26 on the center side, and the support member 5A is a bearing with respect to the outer peripheral surface of the inner cylinder portion 11A. 3, two locking members (stoppers) 51 a and 51 b that are rotatably supported through the support member 5 </ b> A and project outward in the axial direction interfere with the side surfaces 20 a and 20 b of the base 20 in the rotational direction. As a result, the rotation is restricted as in the first embodiment. On the mounting seat 53A formed inside the support member 5A, four braking mechanisms 4 are provided in an axially symmetrical manner at intervals of 90 °, and the four braking pieces 6 facing the braking surface 14 are four operating pieces, respectively. 42 is fixed.

  A bearing lid 251 is provided on the axially outer end surface of the output boss 26, and a seal 252 is provided between the inner peripheral side of the bearing lid 251 and the outer peripheral surface of the support shaft 24. Further, as shown in FIG. 4B, a bearing retainer 33 for pressing and fixing the inner ring of the bearing 3 is provided on the outer end surface in the axial direction of the inner cylinder portion 11A, and the shaft on the central portion side of the support member 5A is provided. A ring-shaped lid 32 for pressing and fixing the outer ring of the bearing 3 is provided on the outer side in the direction, and an oil seal 34 is provided between the center side end of the lid 32 and the bearing retainer 33. ing. Since other configurations are the same as those of the first embodiment, description thereof is omitted.

  In the second embodiment configured as described above, the operation is the same as in the first embodiment except that the driving sheave 1A is attached to the output boss 26. Further, the same effect can be expected, and the braking mechanism 4 can be made smaller than that of the first embodiment by providing the braking pieces 6 at four positions in axial symmetry in the circumferential direction of the braking surface 14. Is obtained. The number of braking mechanisms 4 is not particularly limited. If at least one braking mechanism 4 is provided, a basic effect can be expected. However, it is preferable that the number of braking mechanisms 4 is two or more (a plurality) in terms of balance.

Embodiment 3 FIG.
FIGS. 7 and 8 illustrate an elevator sheave device according to Embodiment 3 of the present invention. FIG. 7 shows that the existing drive sheave of the driving machine is replaced with the sheave device of Embodiment 3. FIG. FIG. 8 is a partially cutaway side view showing the internal structure of the sheave device shown in FIG. 7. In addition, this Embodiment 3 is a case where it applies to the drive machine of the structure where the output shaft (rotating shaft) which supports a drive sheave is supported by one side. In the figure, the output shaft 21 of the existing drive machine 2 protrudes to one side (right side in FIG. 7) of the drive machine 2 body, and the base body 20A of the drive machine 2 is formed as a pedestal. The drive sheave 1 is fitted to the output shaft 21 in the same manner as in the first embodiment, and the holding member 5 is also bearing with respect to the inner tube portion (boss portion) 11 of the drive sheave 1 as in the first embodiment. 3 is rotatably supported.

On the other hand, a locking member (stopper) 51 that restricts the rotation of the holding member 5 is inserted axially into the base 28 fixed to the base body 20 </ b> A by the bolt 28 a via the adjustment shim 27 and fastened to the holding member 5. It consists of multiple bolts. Since other configurations are the same as those of the first embodiment, description thereof is omitted.
In the third embodiment configured as described above, the same operation as that of the first embodiment can be obtained, and the locking member 51 that restricts the rotation of the holding member 5 is provided by a plurality of bolts. Since it is configured, it is easy to manufacture, does not require construction for attaching the block-shaped locking member illustrated in the first and second embodiments, and can be easily assembled.

  As described above, the sheave device of the present invention has a remarkable effect that it can be replaced regardless of the existing support structure of the drive sheave. In the first to third embodiments, the sealing means 7 is provided to seal the installation space of the braking mechanism 4 from the outside. However, the sealing means 7 may not necessarily be sealed. Further, the braking surface 14 is configured on the inner peripheral surface on the back surface side of the leash groove 13, but is not limited to this. You may provide in the position shifted from the part. Furthermore, in the above embodiment, the case where the sheave device of the present invention is used for exchanging the drive sheave of the existing drive machine has been described, but it is needless to say that the present invention is not necessarily limited to replacement. Needless to say, it can be preferably used in the case where a plurality of brakes are installed from the beginning.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows the state which replaced the elevator sheave apparatus which concerns on Embodiment 1 of this invention with the drive sheave of the existing drive machine, FIG.1 (a) is a principal part cross-sectional front view, FIG.1 (b) is FIG. FIG. 2 is a main part cross-sectional view showing a structure of a seal part surrounded by a circle A in FIG. The side view of the drive machine shown by FIG. The partially broken side view which shows the internal structure of the sheave apparatus shown by FIG. It is a figure which shows the state which replaced | exchanged the sheave device of the elevator which concerns on Embodiment 2 of this invention with the drive sheave of the existing drive machine, Fig.4 (a) is a principal part sectional front view, FIG.4 (b) FIG. 5 is a cross-sectional view of the main part showing details in the vicinity of the bearing of FIG. The side view of the drive machine shown by FIG. The partially broken side view which shows the internal structure of the sheave apparatus shown by FIG. The principal part cross-sectional front view which shows the case where the sheave device of the elevator which concerns on Embodiment 3 of this invention is replaced | exchanged for the drive sheave of the existing drive machine. The partially broken side view which shows the internal structure of the sheave apparatus shown by FIG.

Explanation of symbols

  1, 1A drive sheave, 10 sheave device, 11, 11A inner cylinder, 11a inner circumference, 11b outer circumference, 12 outer cylinder, 13 rope groove, 14 braking surface, 2 drive machine, 20, 20A base body, 20a, 20b side portion, 21 output shaft, 22 motor, 23a brake drum, 23b electromagnet mechanism, 23c brake arm, 24 support shaft, 25 bearing, 251 bearing lid, 252 seal, 26 output boss, 27 adjustment shim, 28 pedestal, 28a bolt, 3 bearing, 31 seal, 32 bearing lid, 32 lid, 33 bearing retainer, 34 oil seal, 4 braking mechanism, 41 (41a, 41b) electromagnet mechanism, 42 (42a, 42b) operating piece, braking spring 43 ( 43a, 43b), 5, 5A support member, 51 (51a, 51b) Stop member (stopper), 52 bolt, 53, 53A mounting seat, 54 inspection hole, 55 inspection hole lid, 6 (6a, 6b) braking piece, 7 sealing means, 71 labyrinth seal, 72 hermetic seal.

Claims (7)

  A drive sheave that is provided so as to be rotatable with respect to the base body, has a rope groove on the outer peripheral surface, has an inner peripheral surface or a braking surface on the inner side of the inner peripheral surface, and has an inner cylindrical portion at the center, and this drive A support member that is rotatably supported with respect to the inner cylindrical portion of the sheave and whose rotation is restricted with respect to the base body, and a braking mechanism that is fixed to the support member and moves the braking piece forward and backward with respect to the braking surface; Elevator sheave device characterized by comprising:   2. The drive sheave is formed in a bowl shape or a circular basin shape having an outer cylinder portion in the periphery, and the braking surface is provided on an inner peripheral surface inside the outer cylinder portion. The elevator sheave device as described.   The support member is formed so as to block one side in the axial direction of the drive sheave, and the rotation is restricted by a locking member provided to interfere with the base in the rotation direction. The elevator sheave device according to claim 1 or 2.   The elevator sheave device according to any one of claims 1 to 3, wherein a plurality of the braking pieces are provided symmetrically about the rotation center of the drive sheave.   The elevator sheave device according to any one of claims 1 to 4, further comprising a sealing means between the support member and the drive sheave.   The elevator sheave device according to any one of claims 1 to 5, wherein the support member includes an inspection hole for inspecting the braking mechanism.   7. The drive sheave, the support member, and the braking mechanism are formed so that an existing drive sheave of an elevator can be replaced. The elevator sheave device as described.

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