JP2022142837A - Elevator hoist and elevator - Google Patents

Abstract

To provide a hoist 5 of an elevator 1 and the elevator 1 capable of easily and highly accurately adjusting the position of an encoder 59.SOLUTION: Whether or not a coaxial degree of a rotary part of an encoder 59 with respect to a rotation center line of a drive sheave 54 falls within a permissible range can be confirmed by using a projection shaft part 62a projecting from an outer surface of an encoder bracket 66 coaxially to the rotary part of the encoder 59. When the coaxial degree falls outside the permissible range, the coaxial degree can be adjusted to fall within the permissible range by using axial position adjusting means 71 or axial parallelism adjusting means 72.SELECTED DRAWING: Figure 2

Description

The present invention relates to elevator hoisting machines and elevators.

The hoist described in Patent Document 1 includes a fixed shaft (hollow main shaft 7), a drive sheave (sheave 6) rotatably supported by the fixed shaft, and arranged on the axis of the fixed shaft, an encoder (encoder 21) mounted on a fixed shaft, a front cover (rotary disc-shaped sealing body 19) mounted on the end face of the drive sheave and operatively connected with the rotating part of the encoder on the inside (rotary disc-shaped sealing body 19), and a front cover. and a protruding shaft portion (shaft-shaped detection portion 20a) protruding from the outer surface of the encoder coaxially with the rotating portion of the encoder. Patent document 1 discloses that it is checked whether the coaxiality of the rotating part of the encoder with respect to the rotation center line of the drive sheave is within the allowable range, and if it is out of the allowable range, the mounting position of the front cover is adjusted. It is described that position adjustment of the encoder is performed by

WO2015/125266

However, Patent Literature 1 does not specifically disclose an adjustment means or an adjustment method. Therefore, in the hoist according to Patent Document 1, adjustment work is not easy, and it is difficult to perform highly accurate adjustment work.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide an elevator hoisting machine and an elevator in which the position adjustment of the encoder can be easily and highly accurately performed.

An elevator hoisting machine according to the present invention includes:
a fixed axis;
a drive sheave rotatably supported on a fixed shaft;
an encoder arranged on the axis of the fixed shaft and attached to the fixed shaft;
a cover body having an opening on the center side and attached to the end face of the drive sheave;
an encoder bracket attached to the opening in the cover body and operatively coupled to the rotating part of the encoder inside;
a protruding shaft portion protruding coaxially with the rotating portion of the encoder from the outer surface of the encoder bracket;
A hoisting machine for an elevator, comprising axial position adjusting means for adjusting the position of the encoder bracket in the direction orthogonal to the axis with respect to the cover body.

Also, in this case,
The shaft position adjusting means includes a screw member that is screwed into either the cover main body or the encoder bracket, is screwed in the direction perpendicular to the axis, and has a tip that contacts the other of the cover main body and the encoder bracket. can be adopted.

In addition, another elevator hoisting machine according to the present invention includes:
a fixed axis;
a drive sheave rotatably supported on a fixed shaft;
an encoder arranged on the axis of the fixed shaft and attached to the fixed shaft;
a cover body having an opening on the center side and attached to the end face of the drive sheave;
an encoder bracket attached to the opening in the cover body and operatively coupled to the rotating part of the encoder inside;
a protruding shaft portion protruding coaxially with the rotating portion of the encoder from the outer surface of the encoder bracket;
A hoisting machine for an elevator, comprising shaft parallelism adjusting means for adjusting the inclination of the encoder bracket with respect to the cover body.

Also, in this case,
The shaft-parallelism adjusting means includes a screw member that is screwed into either the cover body or the encoder bracket, is screwed in the axial direction, and has a tip that abuts on the other of the cover body or the encoder bracket. can be adopted.

Further, as one aspect of the elevator hoist according to the present invention,
the drive sheave has a concave end face,
The cover body can be attached to the concave end face of the drive sheave.

Further, as another aspect of the elevator hoist according to the present invention,
the cover body has a concave end face to include the opening;
The encoder bracket can be attached to the concave end face of the cover body.

Further, as another aspect of the elevator hoisting machine according to the present invention,
A central portion of the encoder bracket including a portion where the protruding shaft protrudes is offset axially inward.

Further, as still another aspect of the elevator hoist according to the present invention,
The fixed shaft is a hollow shaft having a hollow portion,
A configuration can be adopted in which the encoder is disposed in the hollow portion of the fixed shaft.

Further, as still another aspect of the elevator hoist according to the present invention,
The cover main body, the encoder bracket, and the projecting shaft are arranged axially inward of the outermost end surface of the drive sheave, and may adopt a configuration in which they do not protrude from the outermost end surface.

Further, as still another aspect of the elevator hoist according to the present invention,
The encoder is a hall type with a cylindrical rotating part,
A configuration can be adopted in which the protruding shaft portion is a distal end portion of the shaft body that passes through the encoder bracket and is inserted into the rotating portion of the encoder.

Further, as still another aspect of the elevator hoist according to the present invention,
The encoder bracket may have a through hole accessible to the end face of the fixed shaft.

Further, the elevator according to the present invention is
An elevator comprising any one of the hoisting machines described above.

According to the present invention, by using the protruding shaft portion, it is possible to check whether the coaxiality of the rotating portion of the encoder with respect to the rotation center line of the drive sheave is within the allowable range. In some cases, it can be adjusted to within acceptable limits by utilizing axial position adjusting means or axial parallelism adjusting means. Therefore, according to the present invention, position adjustment of the encoder can be performed easily and with high accuracy.

FIG. 1 is a schematic perspective view of an elevator. FIG. 2 is a cross-sectional side view of the hoist according to one embodiment of the present invention. FIG. 3 is an enlarged cross-sectional side view of the tip portion of the hoist. FIG. 4 is an enlarged cross-sectional exploded side view of the tip portion of the hoist. FIG. 5 is an enlarged front view of the tip of the hoist. FIG. 6 is an enlarged cross-sectional side view of the tip portion of the hoist according to another embodiment.

DESCRIPTION OF THE PREFERRED EMBODIMENTS As an embodiment of the present invention, a so-called machine-room-less type elevator in which a hoist is arranged in a hoistway will be described below with reference to FIGS. 1 to 5 .

As shown in FIG. 1 , the elevator 1 includes a hoistway 2 , a car 3 and a drive mechanism 4 for the car 3 . The hoistway 2 extends vertically in a multistory building. The car 3 ascends and descends in the hoistway 2 by driving the driving mechanism 4, and stops at a designated story when the driving mechanism 4 is stopped.

The drive mechanism 4 includes a car sheave 40 , a first overhead sheave 41 , a hoisting machine 5 , a second overhead sheave 42 , a counterweight 43 , a counterweight sheave 44 and a main rope 45 . A sheave is a sheave.

A car sheave 40 is arranged in the lower part of the car 3 . The first overhead sheave 41 and the second overhead sheave 42 are arranged on (a frame arranged on) the upper part in the hoistway 2 . The hoisting machine 5 is arranged in the lower part of the hoistway 2 . The counterweight 43 is arranged in a space formed between the wall surface of the hoistway 2 and the car 3 and moves up and down in the hoistway 2 . A counterweight sheave 44 is arranged above the counterweight 43 .

One end 45a of the main rope 45 is fixed to (a frame disposed on) the upper portion of the hoistway 2, and includes the car sheave 40, the first overhead sheave 41, the drive sheave 54 of the hoisting machine 5, and the second overhead sheave. 42 and the counterweight sheave 44, and the other end 45b is fixed to the upper part (the frame arranged in the hoistway 2). Rotation of the drive sheave 54 of the hoisting machine 5 causes the main rope 45 to travel, and accordingly the car 3 to which the car sheave 40 is attached moves up and down in the hoistway 2 . Similarly, as the main rope 45 travels, the counterweight 43 to which the counterweight sheave 44 is attached moves up and down in the hoistway 2 .

The hoisting machine 5 is arranged in a space formed between the wall surface of the hoistway 2 and the car 3 in the lower part of the hoistway 2 . The hoisting machine 5 is arranged so that the front side (the side of a front cover 64 described later) faces the car 3 . Since the space between the wall of the hoistway 2 and the car 3 is narrow, this type of hoist 5 is also called a thin hoist.

As shown in FIG. 2 , the hoisting machine 5 includes a base 50 , a fixed shaft 51 , a rotating body 53 and a drive sheave 54 . The base 50 is a base that supports various components of the hoisting machine 5 . The fixed shaft 51 horizontally protrudes from the base 50 . The fixed shaft 51 rotatably supports the rotor 53 and the drive sheave 54 via bearings 52 . The drive sheave 54 horizontally protrudes from the rotating body 53 and rotates as the rotating body 53 rotates. The drive sheaves 54 run the main ropes 45 to raise and lower the car 3, as described above.

The base 50 has a fixed core 55 along the circumferential direction. A fixed winding 56 is wound around the fixed core 55 . On the other hand, the rotor 53 has a permanent magnet 57 facing the fixed core 55 . The fixed core 55 , fixed windings 56 and permanent magnets 57 constitute a motor section 58 . Accordingly, when the stationary winding 56 is energized, the rotating body 53 and the drive sheave 54 are rotated, and the hoist 5 is driven.

The fixed shaft 51 is a cylindrical hollow shaft having a center line CL as an axis and having a hollow portion 51a centering on the axis. The fixed shaft 51 is integrally formed with the base 50 . However, the fixed shaft 51 may be separate from the base 50 .

The rotating body 53 and drive sheave 54 are arranged coaxially with each other and coaxially with the fixed shaft 51 . The drive sheave 54 is integrally formed with the rotating body 53 . However, the drive sheave 54 may be separate from the rotor 53 .

As shown in FIG. 3 , the hoisting machine 5 further includes an encoder 59 . The encoder 59 measures the number of revolutions of the drive sheave 54 which is the basis for calculating the moving speed of the car 3 . The encoder 59 is a Hall-type encoder having a cylindrical rotating portion. The encoder 59 is arranged in the hollow portion 51 a of the fixed shaft 51 . The encoder 59 is arranged on the axis of the fixed shaft 51 .

The encoder 59 is attached to the fixed shaft 51 via the attachment member 60 . The mounting member 60 is an elastic piece (leaf spring) formed by bending a leaf spring or the like into a predetermined shape. One end of the attachment member 60 is attached to the end surface 51 b of the fixed shaft 51 . More specifically, a screw hole is formed in the end surface 51b of the fixed shaft 51, a screw insertion hole is formed in one end of the mounting member 60, and the fixing screw 61 is screwed into the screw hole and tightened, whereby the mounting member 60 is is fixed to the end surface 51 b of the fixed shaft 51 . Although not shown, the other end of the mounting member 60 is fixed to the peripheral surface or end surface of the encoder 59 in the same manner as the one end. The screw holes and the mounting members 60 are provided, for example, at three equally spaced locations on the fixed shaft 51 and the encoder 59 in the circumferential direction. The encoder 59 can be displaced to some extent in the hollow portion 51a of the fixed shaft 51 by the mounting member 60 having elasticity.

As shown in FIGS. 3 to 5, the hoist 5 further includes a shaft 62 and a front cover 64. As shown in FIGS. The shaft body 62 engages with the rotating portion of the encoder 59 and serves as a rotating shaft for the rotating portion of the encoder 59 . A front cover 64 is attached to the end face of the drive sheave 54 and engages the shaft 62 . As a result, the rotation of the drive sheave 54 is transmitted to the rotating portion of the encoder 59 via the front cover 64 and shaft 62 .

The shaft 62 is arranged on the axis of the fixed shaft 51 . The shaft body 62 includes an outer shaft portion 62a, an inner shaft portion 62b, and a middle step portion 62c. The outer shaft portion 62a is fitted and inserted into an insertion hole 67a (described later) of the front cover 64, and the tip portion side protrudes from the outer surface of the front cover 64. As shown in FIG. The inner shaft portion 62 b is fitted and inserted into the rotating portion of the encoder 59 , and the tip portion side protrudes from the end surface of the encoder 59 . The intermediate step portion 62c is formed to have a larger diameter than the outer shaft portion 62a and the inner shaft portion 62b.

The end surface of the intermediate step portion 62c on the side of the outer shaft portion 62a contacts the inner surface of the front cover 64 and serves as a locking portion for the front cover 64. As shown in FIG. The end surface of the intermediate step portion 62c on the side of the inner shaft portion 62b contacts the end surface of the rotating portion of the encoder 59 and serves as a locking portion for the rotating portion of the encoder 59. As shown in FIG. Threads are formed on the peripheral surfaces of the protruding portions of the outer shaft portion 62a and the inner shaft portion 6b on the middle step portion 62c side. With the front cover 64 and the rotating portion of the encoder 59 in contact with both end surfaces of the intermediate step portion 62c, the ring nut 63 is screwed and tightened to each screw, whereby the rotating portion of the encoder 59, the shaft body 62, and the front face are connected. The covers 64 are coaxially integrated with each other.

By the way, the encoder 59 is covered with the front cover 64 . Therefore, it is not possible to directly confirm whether the coaxiality of the rotating portion of the encoder 59 with respect to the rotation center line of the drive sheave 54 is within the allowable range. Therefore, by measuring the coaxiality of the protruding portion (protruding shaft portion) of the outer shaft portion 62a that protrudes from the outer surface of the front cover 64 and is coaxial with the rotating portion of the encoder 59, with respect to the rotation center line of the drive sheave 54, the driving The coaxiality of the rotating portion of the encoder 59 with respect to the rotation centerline of the sheave 54 can be indirectly measured. The length (projection amount) of the projecting shaft portion 62a is 5 mm or more, or 10 mm or more. In order to improve the measurement accuracy, the peripheral surface of the projecting shaft portion 62a is finished so that the surface roughness Ra is 0.8 (μm) or more and 12.5 (μm) or less.

The front cover 64 has a cover body 65 and an encoder bracket 66 . The cover body 65 is an annular plate attached to the end face of the drive sheave 54 and having an opening 65a on the center side. The encoder bracket 66 is a disk-shaped plate that is attached to the end face of the cover body 65 and closes the opening 65 a of the cover body 65 . Both the cover body 65 and the encoder bracket 66 are metal plates.

The cover main body 65 is attached to a concave end surface 54 a formed inside the outer peripheral portion of the end surface of the drive sheave 54 . More specifically, a bolt hole is formed in the recessed end surface 54a of the drive sheave 54, a bolt insertion hole is formed in the outer peripheral portion of the cover body 65, and a bolt 70 is screwed into the bolt hole and tightened, whereby the cover body 65 is secured. is fixed to the concave end face 54a of the drive sheave 54. As shown in FIG. The bolt holes, the bolt insertion holes, and the bolts 70 are provided, for example, at four equally spaced locations in the drive sheave 54 and the cover body 65 in the circumferential direction. The cover main body 65 is attached to the concave end surface 54a of the drive sheave 54 so that it is arranged axially inward of the outermost end surface of the outer peripheral portion of the drive sheave 54 or flush with the outermost end surface, and protrudes from the outermost end surface. It does not protrude or protrude greatly.

The encoder bracket 66 is attached to a recessed end surface 65c formed inside the outer peripheral portion of the end surface of the cover body 65. As shown in FIG. More specifically, a bolt hole is formed in the concave end surface 65c of the cover body 65, a bolt insertion hole is formed in the outer peripheral portion of the encoder bracket 66, and a bolt 70 is screwed into the bolt hole and tightened, whereby the encoder bracket 66 is mounted. is fixed to the concave end surface 65 c of the cover body 65 . The bolt holes, the bolt insertion holes, and the bolts 70 are provided, for example, at four equally divided locations in the cover body 65 and the encoder bracket 66 in the circumferential direction. The encoder bracket 66 is attached to the concave end surface 65c of the cover main body 65 so that it is arranged axially inward of the outermost end surface of the outer peripheral portion of the cover main body 65 or flush with the outermost end surface, and protrudes from the outermost end surface. It does not protrude or protrude greatly. For this reason, the encoder bracket 66 is arranged axially inward of the outermost end surface of the outer peripheral portion of the drive sheave 54 or is flush with the outermost end surface, and does not protrude from the outermost end surface or protrude greatly from the outermost end surface.

The encoder bracket 66 has a central portion 67 , a peripheral wall portion 68 and an outer peripheral portion 69 . The center portion 67 is a disk-shaped portion having an insertion hole 67a into which the outer shaft portion 62a of the shaft body 62 is inserted. The peripheral wall portion 68 is a cylindrical portion protruding axially outward from the peripheral portion of the central portion 67 . The outer peripheral portion 69 is a flange-like portion that protrudes radially outward from the end portion of the peripheral wall portion 68 and has the above-described bolt insertion hole. Due to this shape, the central portion 67 is arranged axially inward of the outer peripheral portion 69 . That is, the central portion 67 is offset axially inward. For this reason, the outer shaft portion 62a of the shaft body 62 inserted through the central portion 67 is arranged axially inward of the outermost end surface of the outer peripheral portion of the drive sheave 54 or flush with the outermost end surface. It does not protrude from the outer end face or protrude greatly.

The central portion 67 and the peripheral wall portion 68 are portions that are inserted into the opening 65 a of the cover body 65 . The outer diameters of the central portion 67 and the peripheral wall portion 68 are smaller than the inner diameter of the opening 65a. Therefore, a gap is formed between the outer peripheral surfaces of the central portion 67 and the peripheral wall portion 68 and the inner peripheral surface 65b of the opening 65a. Due to this gap, the encoder bracket 66 can be displaced in the radial direction, that is, in the direction perpendicular to the axis of the fixed shaft 51 in the opening 65a.

The central portion 67 has a plurality of through holes 67b at equally spaced locations in the circumferential direction. The through hole 67b is provided for two purposes: to reduce the weight of the front cover 64, and to access the end surface 51b of the fixed shaft 51, that is, to perform the tightening or unfastening operation of the fixing screw 61. .

The hoist 5 further includes shaft position adjusting means 71 and shaft parallelism adjusting means 72 . When the shaft position of the projecting shaft portion 62a with respect to the rotation center line of the drive sheave 54 is out of the allowable range, that is, the shaft position of the rotating portion of the encoder 59 with respect to the rotation center line of the drive sheave 54 is allowed. If it is out of range, it is for adjusting this. When the parallelism of the protruding shaft portion 62a with respect to the rotation center line of the drive sheave 54 is outside the allowable range, that is, when the parallelism of the rotating portion of the encoder 59 with respect to the rotation center line of the drive sheave 54 is If it is out of the acceptable range, it is for adjusting this. The shaft position adjustment and/or the shaft parallelism adjustment can adjust the position of the encoder 59, ie, the coaxiality of the rotating portion of the encoder 59 with respect to the rotational centerline of the drive sheave 54.

The axial position adjusting means 71 adjusts the position of the encoder bracket 66 in the direction orthogonal to the axis relative to the cover body 65 in the front cover 64 . Specifically, the shaft position adjusting means 71 is an hollow set (set screw). A plurality of screw holes are formed through the peripheral wall portion 68 of the encoder bracket 66 in the circumferential direction, and an enamel set is screwed into each of the screw holes. The enamel set is rotatable from the outer surface side of the peripheral wall portion 68 , and is screwed by the rotating operation so as to protrude and retreat from the inner surface of the peripheral wall portion 68 . The peripheral wall portion 68 faces the inner peripheral surface 65 b of the cover main body 65 . Therefore, the tip of the hollow set contacts the inner peripheral surface 65b. By adjusting the amount of protrusion of each hollow set from the inner surface of the peripheral wall portion 68 (including the case where the amount of protrusion is 0), the position of the encoder bracket 66 in the orthogonal direction to the cover body 65 can be adjusted. The screw holes and hollow sets are provided, for example, at four equally divided locations of the peripheral wall portion 68 in the circumferential direction.

The axial parallelism adjusting means 72 adjusts the tilt of the encoder bracket 66 with respect to the cover body 65 in the front cover 64 . Specifically, the axial parallelism adjusting means 72 is a hollow set. A plurality of screw holes are formed through the outer peripheral portion 69 of the encoder bracket 66 in the circumferential direction, and an enamel set is screwed into each of the screw holes. The enamel set is rotatable from the outer surface side of the outer peripheral portion 69 , is screwed by the rotating operation, and can protrude and retreat from the inner surface of the outer peripheral portion 69 . The outer peripheral portion 69 faces the concave end surface 65 c of the cover body 65 . Therefore, the tip of the hollow set contacts the concave end surface 65c. The inclination of the encoder bracket 66 with respect to the cover body 65 can be adjusted by adjusting the amount of protrusion of each enamel set from the inner surface of the outer peripheral portion 69 (including the case where the amount of protrusion is 0). The screw holes and hollow sets are provided, for example, at four equally divided portions in the circumferential direction of the outer peripheral portion 69 and in the same phase as the shaft position adjusting means 71 .

The hoist 5 according to this embodiment has the above configuration. A method of centering the encoder 59 (adjusting the coaxiality of the rotating portion of the encoder 59 with respect to the rotation centerline of the drive sheave 54) is as follows.

First, the bolts 70 that hold the encoder bracket 66 are loosened to such an extent that the encoder bracket 66 does not shift with some force. Next, probes of a lever-type dial gauge or the like are brought into contact with two points spaced apart in the axial direction of the projecting shaft portion 62a. Next, the rotating body 53 is rotated at a low speed by the operation of the motor portion 58 . When the rotating body 53 rotates, the drive sheave 54 and the front cover 64 rotate, and accordingly the projecting shaft portion 62a rotates. If the rotating portion of encoder 59 is not coaxial with the centerline of rotation of drive sheave 54, the dial gauge will touch. Next, the shaft position adjusting means 71 and/or the shaft parallelism adjusting means 72 are operated so as to correct the deflection of the dial age, and the protruding shaft portion 62a is centered, that is, the encoder 59 is centered. . When the centering is completed, the bolt 70 is tightened and fixed. By these procedures, the centering operation of the encoder 59 is completed.

As described above, according to the hoisting machine 5 according to the present embodiment, by using the projecting shaft portion 62a, the coaxiality of the rotating portion of the encoder 59 with respect to the rotation center line of the drive sheave 54 is kept within the allowable range. If it is out of the allowable range, it can be adjusted to be within the allowable range by using the shaft position adjusting means 71 and the parallelism adjusting means 72 . Moreover, these operations can be performed from the car 3 side.

Further, according to the hoisting machine 5 according to the present embodiment, the shaft position adjusting means 71 and the shaft parallelism adjusting means 72 can be easily configured using screw members such as enamel sets, and can be easily configured. Adjustment work can be performed efficiently by operation.

Further, according to the hoisting machine 5 according to the present embodiment, i) the drive sheave 54 has the concave end surface 54a, the cover main body 65 is attached to the concave end surface 54a of the drive sheave 54, and ii) the cover main body 65 has a concave end face 65c, the encoder bracket 66 is attached to the concave end face 65c of the cover body 65, iii) the central portion 67 of the encoder bracket 66 is offset axially inward, iv) the fixed shaft 51 is , is a hollow shaft having a hollow portion 51 a , and the encoder 59 is arranged in the hollow portion 51 a of the fixed shaft 51 . Therefore, according to the hoisting machine 5 according to the present embodiment, the depth dimension of the hoisting machine 5 can be reduced, and the hoisting machine 5 can be made thinner.

Further, according to the hoisting machine 5 according to the present embodiment, the shaft portion and the protruding shaft portion 62a that connect the rotating portion of the encoder 59 and the encoder bracket 66 are configured by the shaft body 62 that is separate from the encoder bracket 66. be done. Therefore, according to the hoisting machine 5 according to the present embodiment, such a configuration can be manufactured at low cost and with high accuracy.

It should be noted that the present invention is not limited to the above embodiments, and various modifications can be made without departing from the gist of the present invention.

In the above embodiment, the cover body 65 and the encoder bracket 66 are formed circular. However, the invention is not limited to this. The cover body and encoder bracket may be of other shapes, such as polygonal.

Further, in the above embodiment, the screw members (hollow sets) of the shaft position adjusting means 71 and the shaft parallelism adjusting means 72 are provided on the encoder bracket 66 . More specifically, the screw member of the shaft position adjusting means 71 is screwed into the wall portion (peripheral wall portion 68 ) of the encoder bracket 66 along the axial direction and is screwed in the direction perpendicular to the axis. It abuts on a surface (inner peripheral surface 65b) along the axial direction. The screwing member of the shaft parallelism adjusting means 72 is screwed to a portion (peripheral portion 69 ) of the encoder bracket 66 along the direction perpendicular to the axis of the encoder bracket 66 , and is screwed in the axial direction. It abuts on the surface along the direction (concave end surface 65c). However, the invention is not limited to this. As shown in FIG. 6 , the screw members of the shaft position adjusting means 71 and the shaft parallelism adjusting means 72 may be provided on the cover body 65 . More specifically, the screw member of the shaft position adjusting means 71 is screwed into the axial wall portion (peripheral wall portion) of the cover body 65 , and is screwed in the direction perpendicular to the axis. It abuts on a surface along the direction (the outer peripheral surface of the cylindrical portion). The screwing member of the shaft parallelism adjusting means 72 is screwed into a portion (annular portion) of the cover main body 65 along the direction perpendicular to the axis (annular portion), and is screwed in the axial direction. abuts on the surface (end surface) along the

Further, in the above-described embodiment, the encoder bracket 66 is provided with the screw members of both the shaft position adjusting means 71 and the shaft parallelism adjusting means 72 . However, the invention is not limited to this. Either the cover main body 65 or the encoder bracket 66 is provided with a screw member for either the shaft position adjusting means 71 or the shaft parallelism adjusting means 72, and the other of the cover main body 65 or the encoder bracket 66 is provided with A screw member for the other of the shaft position adjusting means 71 and the shaft parallelism adjusting means 72 may be provided.

Further, in the above embodiment, the hoist 5 includes both the shaft position adjusting means 71 and the shaft parallelism adjusting means 72 . However, the invention is not limited to this. The hoist 5 may be provided with either the shaft position adjusting means 71 or the shaft parallelism adjusting means 72 .

Further, in the present embodiment, in order to reduce the depth dimension of the hoist, i) the drive sheave 54 has a concave end face 54a, and the cover body 65 is attached to the concave end face 54a of the drive sheave 54. ii) the cover body 65 has a concave end face 65c, and the encoder bracket 66 is attached to the concave end face 65c of the cover body 65; iii) the central portion 67 of the encoder bracket 66 is offset axially inward; iv) The fixed shaft 51 is a hollow shaft having a hollow portion 51 a , and the encoder 59 is arranged in the hollow portion 51 a of the fixed shaft 51 . However, the invention is not limited to this. That is, in the present invention, i) to iv) are not essential, and it is possible to employ only one or none of them.

Further, in the above embodiment, the fixed shaft (main shaft) 51 is a hollow shaft. However, the invention is not limited to this. The fixed shaft may be a solid shaft. In this case, the encoder is arranged close to the end face of the fixed shaft.

Further, in the above embodiment, the encoder 59 is of a Hall type having a cylindrical rotary portion. However, the invention is not limited to this. The encoder may be of shaft type with a protruding rotating shaft. In this case, the rotary shaft may pass through the encoder bracket and have a length such that the distal end portion serves as a protruding shaft portion. Alternatively, the rotating shaft may have a normal length, an extension shaft may be connected and fixed to the rotating shaft, and the distal end portion of the extension shaft may be the projecting shaft portion.

In addition, terms such as "annular", "disk", "cylindrical", "circular", "end", "horizontal", "equally divided", "flush", and "perpendicular" that specify a shape, part or state In the present invention, in addition to itself, it also includes the concept of "abbreviated" meaning close to or similar to it.

Further, in the above embodiment, the rotating body (rotor) 53 is an inner rotor type arranged inside the fixed core 55 and the fixed winding 56 . However, it goes without saying that the present invention can also be applied to an outer rotor type in which the outer peripheral portion of the rotating body (rotor) is arranged outside the fixed core and fixed windings.

Reference Signs List 1 elevator 2 hoistway 3 car 4 drive mechanism 40 car sheave 41 first overhead sheave 42 second overhead sheave 43 counterweight 44 counterweight sheave 45 Main rope 45a One end 45b Other end 5 Winding machine 50 Base 51 Fixed shaft 51a Hollow part 51b End face 52 Bearing 53 Rotator 54 Drive Sheave 54a Concave end surface 55 Fixed iron core 56 Fixed winding 57 Permanent magnet 58 Motor section 59 Encoder 60 Mounting member 61 Fixing screw 62 Shaft 62a Outside Axial portion (protruding shaft portion) 62b... Inner shaft portion 62c...Middle step portion 63...Ring nut 64...Front cover 65...Cover main body 65a...Opening 65b...Internal peripheral surface 65c...Concave end surface 66 Encoder bracket 67 Center portion 67a Insertion hole 67b Through hole 68 Peripheral wall portion 69 Peripheral portion 70 Bolt 71 Shaft position adjusting means 72 Shaft parallelism adjusting means CL center line

Claims (12)

a fixed axis;
a drive sheave rotatably supported on a fixed shaft;
an encoder arranged on the axis of the fixed shaft and attached to the fixed shaft;
a cover body having an opening on the center side and attached to the end face of the drive sheave;
an encoder bracket attached to the opening in the cover body and operatively coupled to the rotating part of the encoder inside;
a protruding shaft portion protruding coaxially with the rotating portion of the encoder from the outer surface of the encoder bracket;
A hoisting machine for an elevator, comprising axial position adjusting means for adjusting a position of an encoder bracket in a direction perpendicular to the axis with respect to a cover body. 1. The shaft position adjusting means comprises a screw member that is screwed into either the cover main body or the encoder bracket, is screwed in a direction orthogonal to the axis, and has a tip that abuts on the other of the cover main body and the encoder bracket. 3. The elevator hoist according to claim 1. a fixed axis;
a drive sheave rotatably supported on a fixed shaft;
an encoder arranged on the axis of the fixed shaft and attached to the fixed shaft;
a cover body having an opening on the center side and attached to the end face of the drive sheave;
an encoder bracket attached to the opening in the cover body and operatively coupled to the rotating part of the encoder inside;
a protruding shaft portion protruding coaxially with the rotating portion of the encoder from the outer surface of the encoder bracket;
A hoisting machine for an elevator, comprising an axis-parallelism adjusting means for adjusting the inclination of the encoder bracket with respect to the cover body. 3. The axial parallelism adjusting means comprises a screw member that is screwed into one of the cover body and the encoder bracket, and that is screwed in the axial direction and whose tip end contacts the other of the cover body and the encoder bracket. 3. The elevator hoist according to claim 1. the drive sheave has a concave end face,
The elevator hoisting machine according to any one of claims 1 to 4, wherein the cover body is attached to the concave end face of the drive sheave. the cover body has a concave end face to include the opening;
The elevator hoisting machine according to any one of claims 1 to 5, wherein the encoder bracket is attached to the concave end face of the cover body. The elevator hoisting machine according to any one of claims 1 to 6, wherein a center portion of the encoder bracket including a portion where the protruding shaft protrudes is offset axially inward. The fixed shaft is a hollow shaft having a hollow portion,
The elevator hoisting machine according to any one of claims 1 to 7, wherein the encoder is arranged in a hollow portion of the fixed shaft. 9. The elevator according to any one of claims 1 to 8, wherein the cover body, the encoder bracket and the projecting shaft are arranged axially inward of the outermost end surface of the drive sheave and do not protrude from the outermost end surface. winding machine. The encoder is a hall type with a cylindrical rotating part,
10. The elevator hoisting machine according to any one of claims 1 to 9, wherein the protruding shaft portion is a distal end portion of a shaft body that penetrates through the encoder bracket and is inserted into the rotating portion of the encoder. The elevator hoisting machine according to any one of claims 1 to 10, wherein the encoder bracket has an accessible through hole in the end face of the fixed shaft. An elevator comprising the hoisting machine according to any one of claims 1 to 11.

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