WO2010143298A1

WO2010143298A1 - Brake device for elevator hoist

Info

Publication number: WO2010143298A1
Application number: PCT/JP2009/060772
Authority: WO
Inventors: 康司小川; 裕治加藤
Original assignee: 三菱電機株式会社
Priority date: 2009-06-12
Filing date: 2009-06-12
Publication date: 2010-12-16
Also published as: JPWO2010143298A1; CN102428020A; EP2441724A1; CN102428020B; EP2441724A4; EP2441724B1; KR101250030B1; KR20120011852A; JP5279905B2

Abstract

A first displaceable body is provided with a first movable iron core, a driven body located separated from the first movable iron core, and a first lining provided on that surface of the driven body which is on the first movable iron core side. A rotation body is provided between the first movable iron core and the first lining. A second displaceable body is provided with a second movable iron core located between the first movable iron core and the rotation body, and also with a second lining provided on that surface of the second movable iron core which is on the rotation body side. The first displaceable body is urged by a first urging body in the direction in which the first lining makes contact with the rotation body, and the second displaceable body is urged by a second urging body in the direction in which the second lining makes contact with the rotation body. An electromagnet in common with the first and second movable iron cores is provided therebetween. The electromagnet causes the first and second movable iron cores to be displaced against urging force of the first and second urging bodies in the direction in which the first and second linings are separated from the rotation body.

Description

Brake device for elevator hoisting machine

This invention relates to a brake device for an elevator hoisting machine that is provided in a hoisting machine having a drive sheave around which a rope or belt for suspending a car is wound and brakes the rotation of the driving sheave.

Conventionally, in order to give a braking force to a rotor that is rotated integrally with a drive sheave, an electromagnetic brake of an elevator hoisting machine that independently brakes the two large and small annular armatures arranged coaxially with respect to the rotor. Proposed. Each armature is pressed against the rotor by the biasing force of a separate coil spring. Thus, the braking force by each armature can be generated independently, thereby improving the reliability of the operation of the electromagnetic brake (see Patent Document 1).

Japanese Patent Laid-Open No. 2000-21118

However, since the diameter of the small armature is smaller than the diameter of the large armature, it is difficult to obtain a sufficient braking force when the braking force is applied to the rotor only by the small armature. In order to secure the braking force only by the small armature, it may be possible to strengthen the biasing force of the coil spring that displaces the small armature, but the impact when the coil spring becomes large or the small armature contacts the rotor. The problem that a sound becomes loud will arise.

The present invention has been made to solve the above-described problems, and provides a brake device for an elevator hoisting machine that can ensure the reliability of a braking operation and can be reduced in size. For the purpose.

A brake device for an elevator hoist according to the present invention includes a rotating body that is rotated integrally with a rotating shaft, a first movable iron core, a driven body that is disposed away from the first movable iron core, and a first moving body. A first lining provided on the surface of the first movable iron core, a rotating body is interposed between the first movable iron core and the first lining, and the first lining contacts and separates from the rotating body. A first displacement body that is displaceable in a moving direction, a second movable iron core disposed between the first movable iron core and the rotating body, and a second provided on a surface of the second movable iron core on the rotating body side. A second displacement body that is displaceable in a direction in which the second lining contacts and separates from the rotating body, and a first urging member that biases the first displacement body in a direction in which the first lining contacts the rotating body. 1 urging body, urging the second displacement body in a direction in which the second lining contacts the rotating body Two urging bodies and the first and second movable iron cores, and the first and second linings move away from the rotating body against the urging forces of the first and second urging bodies. A common electromagnetic magnet for displacing the first and second movable iron cores is provided.

BRIEF DESCRIPTION OF THE DRAWINGS It is a block diagram which shows the elevator apparatus by Embodiment 1 of this invention. It is a longitudinal cross-sectional view which shows the brake device of FIG. It is a front view which shows the brake device of FIG. It is a longitudinal cross-sectional view which shows the state of a brake device when the braking force with respect to the drive sheave of FIG. 1 is cancelled | released. It is a longitudinal cross-sectional view which shows the brake device of the elevator hoisting machine by Embodiment 2 of this invention. It is a longitudinal cross-sectional view which shows the brake device of the elevator hoisting machine by Embodiment 3 of this invention. It is a longitudinal cross-sectional view which shows the state of the brake device when the braking force with respect to the rotating shaft of FIG. 6 is cancelled | released.

Preferred embodiments of the present invention will be described below with reference to the drawings.
Embodiment 1 FIG.
1 is a block diagram showing an elevator apparatus according to Embodiment 1 of the present invention. In the figure, a car 2 and a counterweight 3 are arranged in a hoistway 1 so as to be able to move up and down. A hoisting machine 4 that generates a driving force for moving the car 2 and the counterweight 3 up and down in the hoistway 1 is provided at the bottom (pit part) of the hoistway 1.

The hoisting machine 4 includes a hoisting machine main body 5 including a motor, a drive sheave 6 rotated by the hoisting machine main body 5, and a brake device that brakes rotation of the driving sheave 6 (brake device of an elevator hoisting machine). 7. The car 2 and the counterweight 3 are suspended in the hoistway 1 by a plurality of suspension bodies 8 wound around the drive sheave 6. As the suspension body 8, for example, a rope, a belt, or the like is used.

In the upper part of the hoistway 1, there are provided a heel side return wheel 9, a counterweight side return wheel 10, a first leash stop device 11, and a second leash stop device 12. A pair of car suspension wheels 13 is provided at the lower part of the car 2. On the upper part of the counterweight 3, a counterweight suspension wheel 14 is provided.

One end of the suspension 8 is connected to the first leashing device 11, and the other end of the suspension 8 is connected to the second leashing device 12. The suspension body 8 is wound from the first leashing device 11 in the order of the car suspension wheel 13, the car side return wheel 9, the drive sheave 6, the counterweight side return wheel 10, and the counterweight suspension wheel 14. The second leashing device 12 is reached. The car 2 and the counterweight 3 are moved up and down in the hoistway 1 by the rotation of the drive sheave 6.

FIG. 2 is a longitudinal sectional view showing the brake device 7 of FIG. FIG. 3 is a front view showing the brake device 7 of FIG. Further, FIG. 4 is a longitudinal sectional view showing a state of the brake device 7 when the braking force to the drive sheave 6 of FIG. 1 is released. FIG. 2 shows the state of the brake device 7 when the braking force for the drive sheave 6 is generated. In the figure, the brake device 7 is supported by the casing of the hoisting machine body 5. The brake device 7 brakes the drive sheave 6 by applying a braking force to the rotating shaft 15 of the motor in the hoisting machine body 5.

The brake device 7 includes a brake disk (rotary body) 16 that is rotated integrally with the rotary shaft 15, and a first displacement body 17 and a second displacement that are independently displaceable in a direction in which the brake disk 16 contacts and separates A body 18, a plurality (four in this example) of first urging springs (first urging bodies) 19 for urging the first displacement body 17 in a direction in contact with the brake disk 16, and a brake disk A plurality of (four in this example) second urging springs (second urging members) 20 that urge the second displacement body 18 in a direction in contact with 16, and the hoisting machine main body 5. And a common electromagnetic magnet 21 for displacing each of the first and

second displacement bodies

17 and 18 against the urging force of the first and

second urging springs

19 and 20.

The brake disc 16 is a disk-like member disposed perpendicular to the axis of the rotary shaft 15. The brake disc 16 is fixed to the rotary shaft 15. The brake disc 16 is provided with a first braking surface 16a and a second braking surface 16b that are parallel to each other. The first and

second braking surfaces

16 a and 16 b are formed at positions where the brake disc 16 is sandwiched in the thickness direction of the brake disc 16. In this example, the first and

second braking surfaces

16 a and 16 b are perpendicular to the axis of the rotary shaft 15.

The first displacement body 17 connects the first movable iron core 22, the end plate (driven body) 23 disposed away from the first movable iron core 22, and the first movable iron core 22 and the end plate 23. A plurality of (four in this example) guide pins (connecting members) 24 and a first lining 25 provided on the surface of the end plate 23 on the first movable iron core 22 side.

The first movable iron core 22 and the end plate 23 are arranged away from each other in the direction along the axis of the rotary shaft 15. Further, the first movable iron core 22 and the end plate 23 are annular members centered on the axis of the rotation shaft 15.

Each guide pin 24 is a rod-like member arranged along the axis of the rotary shaft 15 while avoiding the brake disk 16. Each guide pin 24 is fixed between the first movable iron core 22 and the end plate 23. Further, the guide pins 24 are arranged at equal intervals in the circumferential direction of the first movable iron core 22 and the end plate 23.

The first displacement body 17 is supported by the electromagnetic magnet 21 with each guide pin 24 being passed through the electromagnetic magnet 21. The first displacement body 17 is disposed at a position where the brake disk 16 is interposed between the first movable iron core 22 and the first lining 25.

Each guide pin 24 is slidable with respect to the electromagnetic magnet 21. The first displacement body 17 is displaced in a direction along the axis of the rotary shaft 15 by sliding the guide pins 24 with respect to the electromagnetic magnet 21. The first lining 25 is brought into contact with and separated from the first braking surface 16 a of the brake disk 16 when the first displacement body 17 is displaced in the direction along the axis of the rotary shaft 15.

The second displacement body 18 is provided on the second movable iron core 26 disposed between the first movable iron core 22 and the brake disk 16 and on the surface of the second movable iron core 26 on the brake disk 16 side. And a second lining 27. The second displacement body 18 can be displaced along the guide pins 24 with respect to the first displacement body 17. Therefore, the second displacement body 18 can be displaced independently of the first displacement body 17 in the direction along the axis of the rotation shaft 15. The second lining 27 is brought into contact with and separated from the second braking surface 16 b of the brake disk 16 when the second displacement body 18 is displaced in the direction along the axis of the rotary shaft 15.

The second movable iron core 26 is an annular member centered on the axis of the rotary shaft 15. The second movable iron core 26 is provided with a plurality of through holes 28 in accordance with the positions of the respective guide pins 24. Each through hole 28 is fitted with a cylindrical bush 29 through which the guide pin 24 is slidable. Thus, the second displacement body 18 can be displaced along each guide pin 24.

The electromagnetic magnet 21 is disposed between the first movable iron core 22 and the second movable iron core 26. The electromagnetic magnet 21 is an annular body centered on the axis of the rotating shaft 15. Further, the electromagnetic magnet 21 has a stator core 30 fixed to the hoisting machine body 5 and a brake coil 31 provided on the stator core 30.

The stator core 30 is provided with a plurality of through holes 32 in accordance with the positions of the guide pins 24. A cylindrical bush 33 through which the guide pin 24 is slidable is fitted in each through hole 32. Thereby, the first displacement body 17 can be displaced with respect to the electromagnetic magnet 21 in the direction along the axis of the rotation shaft 15.

A plurality of first recesses (first spring receiving portions) 34 are provided on the surface of the stator core 30 on the first movable core 22 side. A plurality of second concave portions (second spring receiving portions) 35 are provided on the surface of the stator core 30 on the second movable iron core 26 side. The first and

second recesses

34 and 35 are arranged at equal intervals in the circumferential direction of the electromagnetic magnet 21.

The first urging springs 19 are disposed in the first recesses 34, respectively. Each first biasing spring 19 is contracted between the electromagnetic magnet 21 and the first movable iron core 22. The first displacing body 17 is urged in the direction in which the first lining 25 is in contact with the first braking surface 16 a by the elastic restoring force of each first urging spring 19.

The second urging springs 20 are disposed in the second recesses 35, respectively. Each second urging spring 20 is contracted between the electromagnetic magnet 21 and the second movable iron core 26. The second displacement body 18 is urged in a direction in which the second lining 27 comes into contact with the second braking surface 16 b by the elastic restoring force of each second urging spring 20.

The electromagnetic magnet 21 generates an electromagnetic attractive force that attracts each of the first and second

movable iron cores

22 and 26 by energizing the brake coil 31. As a result, the first and second

movable iron cores

22 and 26 are displaced in a direction approaching the electromagnetic magnet 21 against the urging forces of the first and second urging springs 19 and 20. When the first movable iron core 22 is displaced in a direction approaching the electromagnetic magnet 21, the first lining 25 is separated from the first braking surface 16 a, and the second movable iron core 26 is displaced in a direction approaching the electromagnetic magnet 21. As a result, the second lining 27 moves away from the second braking surface 16b.

That is, when the electromagnetic coil 21 is energized to the brake coil 31, the first displacement body 17 is opposed to the biasing force of the first biasing spring 19 in the direction in which the first lining 25 moves away from the first braking surface 16a. , And the second lining 27 is displaced against the urging force of the second urging spring 20 in the direction in which the second lining 27 moves away from the second braking surface 16b.

A braking force is applied to the rotating shaft 15 when at least one of the first and

second linings

25 and 27 contacts the brake disc 16. Further, the braking force applied to the rotary shaft 15 is released when both the first and

second linings

25 and 27 are separated from the brake disc 16.

Next, the operation will be described. When energization to the brake coil 31 is stopped, the first lining 25 is pressed against the first braking surface 16 a by the urging force of each first urging spring 19, and each of the second urging springs 20 The second lining 27 is pressed against the second braking surface 16b by the urging force. Thereby, a braking force is applied to the rotating shaft 15 and the brake disc 16.

When the brake coil 31 is energized, the electromagnetic magnet 21 generates an electromagnetic attractive force. As a result, the first movable iron core 22 is displaced in a direction approaching the electromagnetic magnet 21 against the urging force of each first urging spring 19, and the second movable iron core 26 is moved to the second urging spring 20. It is displaced in a direction approaching the electromagnetic magnet 21 against the urging force. Thereby, the 1st lining 25 leaves | separates from the 1st braking surface 16a, and the 2nd lining 27 leaves | separates from the 2nd braking surface 16b. When the first and

second linings

25 and 27 are separated from the first and second braking surfaces 16a and 16b, the braking force on the rotating shaft 15 and the brake disc 16 is released.

For example, the slide failure of the guide pin 24 with respect to the bush 33 occurs in a state where the first lining 25 is separated from the first braking surface 16a, and the displacement of the first displacement body 17 with respect to the brake disk 16 becomes impossible. In this case, only the second lining 27 is pressed against the second braking surface 16b by the urging force of each second urging spring 20. Thereby, a braking force is applied to the rotating shaft 15 and the brake disc 16.

On the other hand, when the displacement of the second displacement body 18 with respect to the brake disc 16 becomes impossible, only the first lining 25 is applied to the first braking surface 16 a by the urging force of each first urging spring 19. Pressed. Thereby, a braking force is applied to the rotating shaft 15 and the brake disc 16.

In such an elevator hoist brake device, the brake disk 16 is interposed between the first movable iron core 22 and the first lining 25 of the first displacement body 17, and the second displacement body 18 Since the second movable iron core 26 and the second lining 27 are disposed between the first movable iron core 22 and the brake disk 16, the first and

second displacement bodies

17, 18 are displaced in directions opposite to each other. By doing so, the first and

second linings

25 and 27 can be pressed against the brake disc 16 from both sides in the thickness direction of the brake disc 16. Thereby, each position where the 1st and

2nd linings

25 and 27 contact the brake disc 16 can be made into the position where the distance from the axis of rotation axis 15 becomes mutually equal. Therefore, even when only one of the first and

second linings

25 and 27 is in contact with the brake disk 16, the braking force applied to the rotary shaft 15 due to the difference between the first and

second linings

25 and 27. A difference in size can be prevented, and the reliability of the braking operation of the brake device 7 can be ensured. In addition, since the distance between the position of each of the first and

second linings

25 and 27 and the axis of the rotary shaft 15 can be made equal to each other, the brake device 7 can be reduced in size in the radial direction.

In the above example, the first urging spring 19 is disposed between the electromagnetic magnet 21 and the first movable iron core 22, but the position of the first urging spring 19 is not limited to this. For example, the first urging spring 19 may be disposed between the separate fixed member fixed to the hoisting machine body 5 and the first movable iron core 22.

In the above example, the second biasing spring 20 is disposed between the electromagnetic magnet 21 and the second movable iron core 26, but the position of the second biasing spring 20 is not limited to this. For example, the second urging spring 20 may be disposed between a separate fixed member fixed to the hoisting machine body 5 and the second movable iron core 26.

In the above example, the second movable iron core 26 is guided along the guide pin 24, but the second movable iron core 26 is moved along a separate rod-like member parallel to the guide pin 24. You may make it guide.

Embodiment 2. FIG.
FIG. 5 is a longitudinal sectional view showing a brake apparatus for an elevator hoist according to Embodiment 2 of the present invention. FIG. 5 is a view showing a state of the brake device when the braking force to the drive sheave 6 is released. In the figure, a plurality of splines 41 along the axis of the rotary shaft 15 are provided on the outer periphery of the rotary shaft 15. The splines 41 are arranged in the circumferential direction of the rotating shaft 15.

In the center of the brake disc 16, a fitting hole 42 through which the rotary shaft 15 is passed while being fitted to each spline 41 is provided. That is, the brake disc 16 is slidably fitted to each spline 41. Thereby, the brake disc 16 can be displaced with respect to the rotating shaft 15 in the direction along each spline 41. Further, the brake disk 16 is fixed to the rotating shaft 15 by engagement with each spline 41 in the circumferential direction of the rotating shaft 15. Other configurations are the same as those in the first embodiment.

Next, the operation will be described. When each of the first and

second displacement bodies

17 and 18 is smoothly displaced, the same operation as in the first embodiment is performed.

For example, the slide failure of the guide pin 24 with respect to the bush 33 occurs in a state where the first lining 25 is separated from the first braking surface 16a, and the displacement of the first displacement body 17 with respect to the brake disk 16 becomes impossible. In this case, the second displacement body 18 is displaced by the urging force of each second urging spring 20, and only the second lining 27 contacts the second braking surface 16b. Thereafter, the brake disc 16 is displaced along each spline 41 in a direction approaching the first lining 25 while being pushed by the second displacement body 18 in a state where the second lining 27 is in contact. Thereafter, the first braking surface 16a is pressed against the first lining 25 and the second lining 27 is pressed against the second braking surface 16b by the urging force of each second urging spring 20. That is, the brake disk 16 is gripped between the first and

second linings

25 and 27. Thereby, a braking force is applied to the rotating shaft 15 and the brake disc 16.

In such elevator hoisting machine brake device, the spline 41 along the axis of the rotary shaft 15 is provided on the rotary shaft 15, and the brake disk 16 is slidably fitted on the spline 41. The brake disc 16 can be prevented from rotating relative to the rotary shaft 15 and can be displaced with respect to the rotary shaft 15 in the direction along the axis of the rotary shaft 15. As a result, even when either one of the first and

second displacement bodies

17 and 18 cannot be displaced, the brake disk 16 is moved to the position of the one displacement body by pressing with the other displacement body. Can be displaced. Therefore, the first and

second linings

25 and 27 can be pressed against the first and second braking surfaces 16a and 16b, respectively, and a decrease in braking force applied to the rotating shaft 15 can be suppressed.

Embodiment 3 FIG.
FIG. 6 is a longitudinal sectional view showing a brake device for an elevator hoist according to Embodiment 3 of the present invention. FIG. 7 is a longitudinal sectional view showing a state of the brake device when the braking force to the rotating shaft 15 in FIG. 6 is released. In the figure, between the first lining 25 and the second lining 27, two

brake discs

51 and 52 having the same configuration as the brake disc 16 of the second embodiment are arranged. The

brake disks

51 and 52 are arranged in a direction along the axis of the rotary shaft 15. Each of the

brake disks

51 and 52 can be independently displaced with respect to the rotary shaft 15 in the direction along each of the splines 41.

Between the one brake disc 51 and the other brake disc 52, a common receiving member 53 for receiving each

brake disc

51, 52 displaced in the direction along the axis of the rotary shaft 15 is disposed. One brake disk 51 is interposed between the first lining 25 and the receiving member 53, and the other brake disk 52 is interposed between the second lining 27 and the receiving member 53.

The receiving member 53 is fixed to the stator core 30. The receiving member 53 includes an intermediate plate 54 disposed perpendicular to the direction along the axis of the rotary shaft 15, an intermediate lining 55 provided on the surface of the intermediate plate 54 on the one brake disc 51 side, And an intermediate lining 56 provided on the other brake disk 52 side surface of the intermediate plate 54.

The intermediate plate 54 is an annular plate centered on the axis of the rotary shaft 15. Further, the intermediate plate 54 is arranged so as to avoid the guide pins 24.

The intermediate lining 55 faces the first lining 25 via one brake disc 51 in the direction along the axis of the rotary shaft 15. The second braking surface 16b of one brake disc 51 can be brought into contact with and separated from the intermediate lining 55.

The intermediate lining 56 faces the second lining 27 via the other brake disc 52 in the direction along the axis of the rotary shaft 15. The first braking surface 16 a of the other brake disc 52 can be brought into contact with and separated from the intermediate lining 56. Other configurations are the same as those of the second embodiment.

Next, the operation will be described. When energization of the brake coil 31 is stopped, the first lining 25 is pressed against the intermediate lining 55 via one brake disk 51 by the urging force of each first urging spring 19, and each second urging spring 19 is energized. The second lining 27 is pressed against the intermediate lining 56 via the other brake disc 52 by the urging force of the urging spring 20. That is, one brake disk 51 is gripped between the first lining 25 and the intermediate lining 55, and the other brake disk 52 is gripped between the second lining 25 and the intermediate lining 56. As a result, a braking force is applied to each of the

brake disks

51 and 52, and a braking force is applied to the rotating shaft 15 and the brake disk 16.

When energization to the brake coil 31 is performed, the first movable iron core 22 is displaced in a direction approaching the electromagnetic magnet 21 against the urging force of each first urging spring 19, and the second movable iron core 26 is moved to the respective positions. The second biasing spring 20 is displaced in a direction approaching the electromagnetic magnet 21 against the biasing force of the second biasing spring 20. As a result, the first lining 25 is displaced in a direction away from the intermediate lining 55, and the second lining 27 is displaced in a direction away from the intermediate lining 56. As a result, one brake disc 51 is separated from each of the first lining 25 and the intermediate lining 55 while being slid along the spline 41, and the second lining 27 is being slid while the other brake disc 52 is being slid along the spline 41. And away from each of the intermediate linings 56. Thereby, the braking force with respect to each

brake disc

51 and 52 is cancelled | released.

For example, the slide failure of the guide pin 24 with respect to the bush 33 occurs when the first lining 25 is separated from the one brake disk 51, and the displacement of the first displacement body 17 with respect to the one brake disk 51 becomes impossible. In this case, only the other brake disc 52 is gripped between the second lining 27 and the intermediate lining 56. Thereby, a braking force is applied to the rotating shaft 15.

Further, when the displacement of the second displacement body 18 with respect to the other brake disc 52 becomes impossible, only one brake disc 51 is gripped between the first lining 25 and the intermediate lining 55. Thereby, a braking force is applied to the rotating shaft 15.

In such an elevator hoisting machine brake device, two

brake disks

51, 52 arranged in a direction along the axis of the rotary shaft 15 are slidably provided on the rotary shaft 15, and each

brake disk

51, 52 is provided. Since the receiving member 53 is disposed between the two, the number of braking surfaces with which the lining is brought into contact can be increased, and the magnitude of the braking force on the rotating shaft 15 can be increased. Further, even when one of the first and

second displacement bodies

17 and 18 cannot be displaced, the

brake disk

51 or 52 is displaced while being pushed by the other displacement body. Thus, the

brake disks

51 and 52 can be gripped, and the reliability of the braking operation of the brake device 7 can be ensured.

In the above example, the receiving member 53 is fixed to the fixed iron core 30, but the present invention is not limited to this. For example, the receiving member 53 may be fixed to the hoisting machine body 5. .

In the above example, the receiving member 53 is fixed to the fixed iron core 30 and the hoisting machine main body 5 not only in the rotation direction of the

brake disks

51 and 52 but also in the direction along the axis of the rotation shaft 15. However, the receiving member 53 may be fixed to the fixed iron core 30 and the hoisting machine main body 5 only in the rotation direction of the

brake disks

51 and 52. That is, if the receiving member 53 is fixed to the fixed iron core 30 and the hoisting machine main body 5 with respect to the rotation direction of the

brake disks

51 and 52, the receiving member 53 rotates in the direction along the axis of the rotating shaft 15. May be displaceable.

Claims

A rotating body that rotates together with the rotating shaft,
A first movable iron core; a follower disposed away from the first movable iron core; and a first lining provided on a surface of the follower on the first movable iron core side, A first displacement body that is displaceable in a direction in which the rotating body is interposed between the first movable iron core and the first lining, and the first lining contacts and separates from the rotating body;
A second movable iron core disposed between the first movable iron core and the rotating body, and a second lining provided on a surface of the second movable iron core on the rotating body side, A second displacement body capable of being displaced in a direction in which the second lining contacts and separates from the rotating body;
A first urging body that urges the first displacement body in a direction in which the first lining is in contact with the rotating body;
A second urging body that urges the second displacement body in a direction in contact with the rotating body; and a first urging body that is disposed between the first and second movable iron cores. The first and second linings have a common electromagnetic magnet for displacing the first and second movable iron cores in a direction away from the rotating body against the urging force of the second urging body. Brake device for elevator hoisting machine.
The first and second displacement bodies can be displaced along the axis of the rotation axis,
The rotating shaft is provided with a spline along the axis of the rotating shaft,
The brake device for an elevator hoist according to claim 1, wherein the rotating body is slidably fitted to the spline.
The rotating shaft is provided with the two rotating bodies arranged between the first and second linings and arranged in a direction along the axis of the rotating shaft,
The elevator hoisting machine brake device according to claim 2, wherein a receiving member is provided between each of the rotating bodies, and each of the rotating bodies contacts and separates from the receiving member.