JP2008074590A - Hoist for elevator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily attach the pulley of a hoist for an elevator to a bearing holding part. <P>SOLUTION: A rotary frame 29 is rotatably supported on a cantilevered fixed shaft 28 of a hoist 15. A pulley 32 is detachably attached to the outside of the rotary frame 29. The mounting hole 33 of the pulley 32 is fitted to a bearing holding part 34 projecting to the outside of the rotary frame 29. Both pulleys 32, 34 are set coaxially with the fixed shaft. The joining surfaces 50, 51 of the bearing holding part 34 and the mounting hole 33 are tapered at the same angle, and have groove parts 52 and projections 53 between the groove parts 52. When the mounting hole 33 is fitted to the bearing holding part 34, the groove parts 52 and the projections 53 are joined to each other. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an elevator hoisting machine using a flat motor.

  As this type of elevator hoisting machine, for example, a type described in Patent Document 1 is known. This hoisting machine is attached to a support base at the upper part of the hoistway, and drives the sheave to rotate up and down the car.

  Referring to FIG. 7, the outline will be described. The hoisting machine 1 is mainly composed of a flat motor, and has a fixed frame 2 standing vertically on a support base, and is cantilevered by the fixed frame 2. The fixed shaft 3, the rotating frame 4 rotatably supported on the fixed shaft 3, the bearing holding portion 5 projecting from the center of the rotating frame 4, and the detachably attached to the bearing holding portion 5 A sheave 6, a rotor 7 supported on the inner periphery of the rotary frame 4, a stator 8 fixed to the fixed frame 2 with a gap in the radial direction from the rotor 7, and the rotary frame 4 The bearing holding portion 5 is formed concentrically with the axis of the fixed shaft 2.

  The sheave 6 is detachably attached by screwing a bolt 11 into the bottom 10 of the rotating frame 4 and has a V-shaped rope groove 12 around which a rope is wound.

  In addition, a mounting hole 13 to be attached to the bearing holding portion 5 is formed in the central portion of the sheave 6. The inner diameter of the mounting hole 13 is set to a size that can be attached to the outer peripheral surface of the bearing holding portion 5 with a minute gap.

Since the bearing holding portion 5 and the fixed shaft 3 are concentric, the center of the rope groove 12 coincides with the axis of the fixed shaft 3 when the mounting hole 13 is attached to the bearing holding portion 5. Therefore, when replacing the sheave 6, the bolt 11 is removed, the sheave 6 is removed from the rotating frame 4, the new sheave 6 is mounted on the bearing holding portion 5, and the bolt 11 is screwed into the rotating frame 4, so that a new The rope groove 12 of the sheave 6 is fixed concentrically with the fixed shaft 3.
JP 2000-16727 A

  However, although the hoisting machine 1 has a minute gap between the mounting hole 13 of the sheave 6 and the bearing holding portion 5, there is a problem in the mounting operation to the bearing holding portion 5.

  That is, when the sheave 6 is mounted on the bearing holding portion 5, the sheave 6 must be kept perpendicular to the bottom portion 10. However, since the sheave 6 is heavy, it is often difficult to keep the sheave vertical. In particular, since the space in the elevator hoistway is narrow, the work of attaching the sheave 6 is not easy and the workability may be deteriorated.

  The present invention is a technical idea created to solve the above-mentioned problems. The invention according to claim 1 is a fixed shaft that is cantilevered by a fixed frame in a hoistway, and is rotatable on the fixed shaft. A rotary frame pivotally supported by the motor, a motor configured between the rotary frame and the fixed frame, and a rope around which a rope that is detachably attached to the outer surface of the rotary frame and lifts the car is wound. A sheave and a bearing holding portion that protrudes from an outer surface of the rotating frame and is fitted with a mounting hole of the sheave. The sheave and the bearing holding portion are concentric with the axis of the fixed shaft. The elevator hoisting machine is characterized in that the inner surface of the mounting hole and the outer surface of the bearing holding portion are formed in a tapered shape with the same angle.

  According to this invention, since the both surfaces are tapered at the same angle, the mounting hole can be attached to the bearing holding portion even when the sheave is tilted.

  According to a second aspect of the present invention, there is provided a fixed shaft that is cantilevered by a fixed frame in the hoistway, a rotary frame that is rotatably supported by the fixed shaft, and the rotary frame and the fixed frame. A motor that is configured, a sheave that is attached to the outer surface of the rotating frame using a fixture, and on which a rope that raises and lowers the car is wound, and that protrudes from the outer surface of the rotating frame, A hoisting machine for an elevator comprising a bearing holding portion to which a mounting hole of a vehicle is mounted, wherein the sheave and the bearing holding portion are formed concentrically with an axis of the fixed shaft, The inner surface of the bearing and the outer surface of the bearing holding portion are formed in a tapered shape having the same angle, and a coupling means for coupling the both surfaces is provided.

  According to this invention, since the both surfaces are tapered at the same angle, the mounting hole can be attached to the bearing holding portion even when the sheave is tilted. After the mounting, the both surfaces are coupled, so that the rotation of the bearing holding portion is transmitted to the sheave.

  In addition, as one aspect of the joining means, for example, as in the invention described in claim 3, the joining means includes a plurality of groove portions formed at equal intervals along the axial direction of the both surfaces, and protrusions between the groove portions. Things. As a result, the grooves and the protrusions are coupled to each other, and the rotation of the bearing holding portion is transmitted to the sheave.

  According to the first to third aspects of the present invention, since the mounting hole can be attached to the bearing holding portion while the sheave is tilted, it is not necessary to keep the sheave vertical, thereby making it easy to install the sheave. Become.

  In particular, according to the invention described in claim 2.3, since the rotation of the bearing holding portion is transmitted to the sheave, the load applied to the fixture is reduced.

  1 to 6 show an elevator hoist according to an embodiment of the present invention, and the hoist 15 is installed on a support base 17 in a hoistway 16, as shown in FIG. The elevator car 18 is raised and lowered.

  In other words, a pair of car rails 19 are erected in the hoistway 16 at a predetermined interval, and the car 18 is guided so as to be movable up and down. The car 18 supports a pair of guide pulleys 20 on both sides in the opening direction at the bottom. A main rope 21 wound around the guide pulley 20 passes through the bottom of the car 18, and one end of the main rope 21 is supported by one beam 22 on the ceiling side.

  In addition, a pair of weight guide rails 23 are erected on the hoistway 16 in parallel with the car guide rails 19 at a predetermined interval to guide the counterweight 24 so that it can be raised and lowered in the vertical direction. . A guide pulley 25 is pivotally supported on the upper portion of the counterweight 24, and the other end of the main rope 21 is wound around the guide pulley 25 and supported by the other beam 22.

  Specifically, as shown in FIG. 1, the hoisting machine 15 includes a fixed frame 27 erected perpendicularly to a base 26 on the support base 17 and a fixed cantilever supported by the fixed frame 27. A shaft 28, a rotating frame 29 rotatably supported by the fixed shaft 28, a motor 30 configured between the rotating frame 29 and the fixed frame 27, and the support frame 27 supported by the fixed frame 27 A sensor 31 that detects the speed of the motor 30, a sheave 32 that is detachably attached to the outer surface of the rotating frame 29, and on which the main rope 21 is wound, and projects from the outer surface of the rotating frame 27. The bearing holding part 34 to which the mounting hole 33 of the sheave 32 is mounted is mainly configured.

  The fixed shaft 28 has a cantilever-side large-diameter portion 35 and a free-end-side small-diameter portion 36, and the large-diameter portion 35 is cantilevered on the vertical surface of the fixed frame 27. The rotary frame 29 is rotatably supported on the small diameter portion 36 via a bearing 37.

  The rotary frame 29 is formed in a bottomed cylindrical cup shape, and includes a disk-shaped bottom portion 38 and a peripheral wall 39 formed on the periphery of the bottom portion 38, and a brake 40 is provided on the outer periphery of the peripheral wall 39. It has been. The brake 40 is a drum-type brake that uses the peripheral wall 39 as a rotating drum. As shown in FIG. 3, the brake 40 has a pair of brake arms 41 that are pivotally supported at one end on the base 26, and both the brake arms. A pair of braking shafts 43 that pass through the other ends of the braking arms 41 and are opposed to each other, and the braking shafts 43. And an electromagnet 45 that operates so as to separate the two brake shafts 43 against the brake spring 44.

  As shown in FIG. 1, the motor 30 includes a rotor 46 supported on the inner periphery of the peripheral wall 39, and a stator 47 fixed to the fixed frame 27 with a gap in the circumferential direction. And the rotor 46 is configured as an abduction type facing the outer diameter side of the stator 47. In the rotor 46, a plurality of permanent magnets may be attached to the inner periphery of the peripheral wall 39, and a rotor core embedded with a plurality of permanent magnets may be disposed on the inner periphery of the peripheral wall 39. On the other hand, the stator 47 includes a stator core 47a in which silicon steel plates are laminated and a stator winding 47b wound around the stator core 47a. The stator 47 is fixed to the fixed frame 27 via a bracket 48. Yes.

  The bearing holding portion 34 protrudes from the center of the outer surface of the bottom portion 38 and is set concentrically with the axis of the fixed shaft 28. On the other hand, in the sheave 32, a V-shaped rope groove 49 around which the main rope 21 is wound is formed on the outer peripheral portion, and the mounting hole 33 is formed in the central portion on the rotating frame side P.

  Therefore, if the mounting hole 33 is attached to the bearing holding portion 34, the center of the rope groove 49 coincides with the axis of the fixed shaft 28. At this time, the inner peripheral surface 51 of the mounting hole 33 and the outer peripheral surface 50 of the bearing holding portion 34 are coupled.

  That is, as shown in FIGS. 4 and 5, the mounting hole 33 and the bearing holding portion 34 are formed in similar truncated octagonal shapes, and the inner diameter of the mounting hole 33 on the rotary frame side P is the bearing holding. It is set larger than the inner diameter of the portion 34 on the counter-rotating frame side Q, and the both surfaces 50 and 51 are formed in a tapered shape having a diameter reduced from the rotating frame side P toward the counter-rotating frame side Q at the same angle.

  The both surfaces 50, 51 have a plurality of V-shaped groove portions 52 formed at equal intervals along the axial direction, and inverted V-shaped protrusions 53 between the groove portions 52. Accordingly, when the mounting hole 33 is mounted on the bearing holding portion 34 as shown in FIG. 6, the groove portion 52 and the protrusion 53 are coupled to each other. After the coupling, the sheave 32 is fixed by screwing the bolt 54 into the bottom portion 38.

  Therefore, when the sheave 32 is replaced due to wear of the rope groove 49 or the like, the bolt 54 is removed and the sheave 32 is pulled out from the bearing holding portion 34, and then the new sheave 32 is attached to the bearing holding portion 34. When the bolt 54 is screwed in, the rope groove 49 of the new sheave 32 is fixed concentrically with the fixed shaft 28.

  In this case, the both surfaces 50 and 51 are tapered, so that the sheave 32 can be mounted on the bearing holding portion 34 even when the sheave 32 is tilted. Therefore, it is not necessary to keep the sheave 32 vertical, and thus the sheave 32 can be easily mounted even in the hoistway 16 having a small space. In this respect, workability is improved and work time is shortened.

  The bearing holding portion 34 plays a role of transmitting the rotation of the rotary frame 29 to the sheave 32 after mounting, in addition to the role of a guide when the mounting hole 33 is mounted. That is, in the hoist 1 of Patent Document 1, since a minute gap is provided between the mounting hole 13 and the bearing holder 5, the rotation of the rotating frame 4 is transmitted to the sheave 6 by the bolt 11. .

  On the other hand, when the mounting hole 33 is attached to the bearing holding portion 34, the hoisting machine 15 couples the groove portion 52 and the protrusion 53, so that when the rotary frame 29 rotates, the bearing holding portion 34. Is transmitted to the sheave 32 through the groove 52 and the protrusion 53.

  Therefore, it is not necessary for the bolts 54 to receive the torque of the rotating frame 29, and the thrust load applied to the bolts 54 is reduced. As a result, the strict accuracy of the bolt holes 55 is not required, and the number and strength of the bolts 54 are reduced. Yes, and the cost is reduced in this respect.

  In addition, this invention is not limited to the said embodiment, For example, the said rotor 46 can also be applied to the winding machine of the internal-rotation type motor which made the inner diameter side of the stator 47 oppose.

  Further, the present invention can be applied to a hoisting machine with an electromagnetic disc brake in which a disc orthogonal to the fixed shaft 28 is formed on the outer periphery of the peripheral wall 39 and an electromagnetic brake is disposed at a position sandwiching the disc.

  Further, the groove 52 and the protrusion 53 can be eliminated, and the bearing holding portion 34 and the mounting hole 33 can be formed in a truncated cone shape. In this case, although the rotation of the bearing holding portion 34 cannot be transmitted to the sheave 32, the both surfaces 50 and 51 are formed in a tapered curved surface, so that the sheave 32 can be held without keeping the sheave 32 vertical. It can be attached to the portion 33.

The longitudinal cross-sectional view of the winding machine which concerns on embodiment of this invention. Schematic of an elevator. The front view of a brake device. (A) is a longitudinal cross-sectional view of a bearing holding portion, and (b) is a front view thereof. The fragmentary longitudinal cross-sectional view of a sheave. The perspective view which shows the state which attaches a mounting hole to a bearing holding | maintenance part. The longitudinal cross-sectional view of a prior art example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 15 ... Hoisting machine 27 ... Fixed frame 28 ... Fixed axis | shaft 29 ... Rotating frame 30 ... Motor 32 ... Sheave 33 ... Mounting hole 34 ... Bearing holding part 50 ... Outer peripheral surface of a bearing holding part 51 ... Inner peripheral surface 52 of a mounting hole ... groove 53 ... projection 54 ... bolt (fixing tool)

Claims (3)

A fixed shaft cantilevered by a fixed frame in the hoistway;
A rotating frame rotatably supported on the fixed shaft;
A motor configured between the rotating frame and the fixed frame;
A sheave that is detachably attached to the outer surface of the rotating frame and on which a rope that raises and lowers the car is wound;
A bearing holding part protruding from the outer surface of the rotating frame and fitted with a mounting hole of the sheave,
An elevator hoisting machine in which the sheave and the bearing holding portion are formed concentrically with the axis of the fixed shaft,
An elevator hoisting machine, wherein an inner surface of the mounting hole and an outer surface of the bearing holding portion are formed in a tapered shape having the same angle. A fixed shaft cantilevered by a fixed frame in the hoistway;
A rotating frame rotatably supported on the fixed shaft;
A motor configured between the rotating frame and the fixed frame;
A sheave attached to the outer surface of the rotating frame using a fixing tool, on which a rope for raising and lowering the car is wound,
A bearing holding part protruding from the outer surface of the rotating frame and fitted with a mounting hole of the sheave,
An elevator hoisting machine in which the sheave and the bearing holding portion are formed concentrically with the axis of the fixed shaft,
While forming the inner surface of the mounting hole and the outer surface of the bearing holding portion in a tapered shape of the same angle,
An elevator hoisting machine provided with a coupling means for coupling the both surfaces.   The elevator hoisting machine according to claim 2, wherein the coupling means includes a plurality of groove portions formed at equal intervals along the axial direction of the both surfaces, and protrusions between the groove portions.

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