JP2017190238A - Elevator braking device - Google Patents

Abstract

An elevator braking device capable of returning a brake disc to a rotatable state even when a friction lining of the brake disc is stuck to a hoisting machine main body.
An elevator braking device according to the present embodiment is provided with a hoisting machine main body that rotates a rope for elevating and lowering an elevator car, and opposed to the hoisting machine main body, and rotates as the elevator car moves up and down. A disc-shaped brake disc, a friction lining provided on at least an end surface facing the hoisting machine main body of both end surfaces in the axial direction of the brake disc, and pressing the brake disc toward the hoisting machine main body side Accordingly, a braking portion that brakes the lifting and lowering of the elevator car, and a peeling portion that peels the brake disc from the hoisting machine main body when the braking state by the braking portion is released.
[Selection] Figure 2

Description

  Embodiments described herein relate generally to an elevator braking device.

  The elevator apparatus connects an elevator car and a counterweight with a rope, and rotates the rope with a hoist to raise and lower the elevator car. Further, the elevator apparatus is configured to include a braking device for raising and lowering the elevator car, in other words, stopping the rotation of the rope. For example, Patent Document 1 discloses a configuration example of this type of braking device. The braking device has a configuration in which friction linings are provided on both end surfaces in the axial direction of a disc-like brake disk that rotates as the elevator car moves up and down. The braking device presses the brake disc against the hoisting machine main body side by the braking plate, thereby stopping the elevator car from moving up and down due to friction between the friction lining and the hoisting machine main body.

JP2013-103832A

  By the way, in the conventional braking device that stops the raising / lowering of the elevator car due to the friction between the friction lining and the hoisting machine main body, the friction lining may stick to the hoisting machine main body. For example, when lifting and lowering the elevator car is stopped in a hot and humid environment, for example, when lifting and lowering the elevator car is stopped for a long time such as several days, the friction lining tends to stick to the hoisting machine body. It is known. If the friction lining adheres to the hoisting machine main body, the brake disk cannot be returned to a rotatable state, and an event may occur in which the elevator car cannot be raised or lowered.

  Therefore, the present embodiment provides an elevator braking device that can return the brake disc to a rotatable state even when the friction lining of the brake disc is stuck to the hoisting machine main body.

  The elevator braking device according to the present embodiment includes a hoisting machine main body, a brake disk, a friction lining, a braking unit, and a peeling unit. The hoisting machine main body rotates a rope for raising and lowering the elevator car. The brake disc has a disc shape, is provided to face the hoisting machine body, and rotates as the elevator car moves up and down. The friction lining is provided on at least an end surface of the brake disc facing the hoisting machine main body in both axial end surfaces. A braking part brakes the raising / lowering of the said elevator car by pressing the said brake disc to the said winding machine main body side. The peeling part peels off the brake disc from the hoisting machine main body as the braking state by the braking part is released.

The figure which shows schematically the example of a whole structure of the elevator braking device which concerns on this embodiment. The figure which shows schematically the structural example of the principal part of the elevator braking device which concerns on 1st Embodiment (the 1). The figure which shows the structural example of the principal part of an elevator braking device (the 2) FIG. 3 schematically shows a configuration example of a main part of an elevator braking device (part 3). The figure which shows schematically the structural example of the principal part of the elevator braking device which concerns on 2nd Embodiment (the 1). The figure which shows the structural example of the principal part of an elevator braking device (the 2) The figure which shows schematically the structural example of the principal part of the elevator braking device which concerns on 4th Embodiment. The figure which shows schematically the structural example of the principal part of the elevator braking device which concerns on 5th Embodiment. The figure which shows schematically the structural example of the principal part of the elevator braking device which concerns on 6th Embodiment.

  Hereinafter, a plurality of embodiments according to an elevator braking device will be described with reference to the drawings. In each embodiment, substantially the same elements are denoted by the same reference numerals, and description thereof is omitted.

(First embodiment)
An elevator braking device 10 illustrated in FIG. 1 includes a hoisting machine main body 11 and a braking mechanism unit 12. The hoisting machine main body 11 includes a sheep 15 that functions as a driving sheave at the end of the rotary shaft 14 of the rotary drive motor 13. A rope 16 that connects an elevator car and a counterweight (not shown) is stretched over the sheep 15. The hoisting machine main body 11 has a configuration in which the rope 16 is moved up and down by rotating the sheep 15 by the rotation drive motor 13, thereby raising and lowering the elevator car.

  The braking mechanism unit 12 includes a brake disk 17 and a braking unit 18. The brake disc 17 has a disk shape, and a central portion thereof is attached to an end portion on the opposite side to the sheep 15 of both end portions of the rotation shaft 14 of the rotation drive motor 13. The brake disc 17 is rotated together with the sheep 15 by the rotation drive motor 13. Therefore, the brake disc 17 rotates with the rotation of the sheep 15, that is, with the elevator car moving up and down.

  The brake disc 17 includes friction linings 19 on both end surfaces in the axial direction. That is, the brake disc 17 has the friction lining 19 on both the end surface facing the hoisting machine body 11 and the end surface facing the braking portion 18. The friction lining 19 is provided in an annular shape along the peripheral end of the brake disc 17.

  The braking unit 18 includes a coil case unit 20 and a braking plate 21, and is fixed to the hoisting machine main body 11 with bolts 22. In this case, the elevator braking device 10 includes two braking portions 18 so as to sandwich the rotating shaft 14 of the rotary drive motor 13. An electromagnetic coil 23 is provided in the coil case portion 20. The brake plate 21 is biased toward the brake disc 17 by a spring 24. The spring 24 is compressed when the energization of the electromagnetic coil 23 is turned on. Thereby, the brake plate 21 is drawn toward the coil case part 20 side. Further, the spring 24 is extended when the electromagnetic coil 23 is turned off. Thereby, the brake plate 21 is pushed out to the hoisting machine main body 11 side.

  The brake unit 18 presses the brake disc 17 toward the hoisting machine main body 11 by the brake plate 21 by turning off the energization of the electromagnetic coil 23. Then, the friction between the friction lining 19 and the hoisting machine main body 11 stops the rotation of the brake disc 17, that is, the elevator car. Moreover, the brake part 18 cancels | releases the press state of the brake disc 17 by the brake plate 21, ie, a braking state, by turning ON electricity supply of the electromagnetic coil 23. FIG. As a result, the brake disk 17 returns to a rotatable state, and the elevator car can be raised and lowered.

  In the configuration in which the lift of the elevator car is stopped by the friction between the friction lining 19 and the hoisting machine main body 11, the friction lining 19 sticks to the hoisting machine main body 11, and the brake disc 17 cannot be returned to a rotatable state. An event can occur. For this reason, the elevator braking device 10 employs a configuration for returning the brake disc 17 to a rotatable state even when the friction lining 19 is stuck to the hoisting machine main body 11.

  That is, as illustrated in FIG. 2, the elevator braking device 10 includes a peeling portion 25 on the braking plate 21. The peeling portion 25 is fixed to the outer end portion of the braking plate 21 with a bolt 26. The peeling part 25 includes a base part 25a extending from the outer end of the brake plate 21 toward the hoisting machine main body 11 and a claw extending from the end of the base part 25a toward the hoisting machine main body 11 toward the rotary shaft 14. Part 25b. The peeling part 25 moves to the hoisting machine main body 11 side and the coil case part 20 side along the axial direction of the rotating shaft 14 together with the brake plate 21. Along with this, the claw portion 25b of the peeling portion 25 also moves to the hoisting machine main body 11 side and the coil case portion 20 side along the axial direction of the rotating shaft 14. A step portion 11 a is provided at the end of the hoisting machine main body 11 on the braking portion 18 side. This step portion 11a is to secure a space for allowing movement of the claw portion 25b of the peeling portion 25.

  Next, an example of the peeling operation of the brake disc 17 by the elevator braking device 10 will be described. That is, when the brake disc 17 is pressed against the hoisting machine main body 11 side by the braking portion 18 from the non-braking state in which the brake disc 17 can rotate as illustrated in FIG. The brake disc 17 is pressed against the hoisting machine main body 11 and the friction between the friction lining 19 and the hoisting machine main body 11 stops the rotation of the brake disc 17, that is, the elevator car ascending / descending. Then, when returning from this braking state to a non-braking state in which the elevator car can be raised and lowered, the braking plate 21 of the braking portion 18 is drawn toward the coil case portion 20 as illustrated in FIG. At this time, as the brake plate 21 moves, the peeling portion 25 is also drawn toward the coil case portion 20 side. As a result, the claw portion 25 b of the peeling portion 25 is locked to the end surface of the brake disc 17 on the hoisting machine main body 11 side, and the brake disc 17 is peeled off from the hoisting machine main body 11.

  According to the present embodiment, the elevator braking device 10 peels off the brake disc 17 from the hoisting machine main body 11 by the peeling unit 25 as the braking state by the braking unit 18 is released. Therefore, even if the friction lining 19 of the brake disc 17 is stuck to the hoisting machine main body 11, the brake disc 17 can be returned to a rotatable state, and the elevator car cannot be raised or lowered. The occurrence of an event can be avoided.

(Second Embodiment)
The elevator braking device 10 illustrated in FIGS. 5 and 6 includes a push-off portion 30. The push-off portion 30 is provided at an end portion facing the brake disc 17 in both axial end portions of the brake plate 21. The push-off part 30 includes a ball plunger 30b in the main body part 30a. The ball plunger 30b is urged toward the brake disc 17 by a spring 30c. Further, the ball plunger 30b is housed rotatably in the main body 30a.

  According to the present embodiment, when the brake disk 17 is pressed against the hoisting machine main body 11 by the brake unit 18 from the non-braking state in which the brake disk 17 can rotate as illustrated in FIG. 5, the braking state illustrated in FIG. It becomes. At this time, the ball plunger 30b of the push-off portion 30 abuts on the end surface of the brake disc 17 on the brake portion 18 side, whereby the ball plunger 30b is pushed into the main body portion 30a. Further, the ball plunger 30 b abuts against the end surface of the brake disc 17, thereby generating a resistance force against the rotation of the brake disc 17. Therefore, the ball plunger 30b also has a braking function for braking the rotation of the brake disc 17. The ball plunger 30b is rotatably provided. For this reason, even if it contacts the brake disc 17, the end face of the brake disc 17 is hardly damaged.

  When returning from the braking state to the non-braking state, the braking plate 21 of the braking unit 18 is pulled toward the coil case unit 20 side. At this time, as the brake plate 21 moves, the push-off portion 30 is also drawn toward the coil case portion 20 side. The ball plunger 30b is pushed out of the main body 30a by the urging force of the spring 30c as the pushing-away part 30 is pulled toward the coil case part 20 side. The brake disc 17 is pushed away from the braking portion 18 by the pushed ball plunger 30b.

  Further, as the brake plate 21 moves, the peeling portion 25 is also drawn toward the coil case portion 20 side. As a result, the claw portion 25 b of the peeling portion 25 is locked to the end surface of the brake disc 17 on the hoisting machine main body 11 side, and the brake disc 17 is peeled off from the hoisting machine main body 11.

  Also according to the present embodiment, when the friction lining 19 of the brake disc 17 is stuck to the hoisting machine body 11, the brake disc 17 can be returned to a rotatable state by being peeled off by the peeling portion 25. The occurrence of an event in which the elevator car cannot be raised or lowered can be avoided.

  In addition, the elevator braking device 10 pushes the brake disc 17 away from the brake plate 21 of the braking unit 18 by the push-off unit 30 in conjunction with releasing the braking state by the braking unit 18. Therefore, even when the friction lining 19 of the brake disc 17 is stuck to the brake plate 21 of the braking portion 18, the brake disc 17 can be returned to a rotatable state, and the elevator car cannot be raised or lowered. It is possible to avoid the occurrence of an event.

(Third embodiment)
In this embodiment, a control device (not shown) that controls the overall operation of the elevator braking device 10 is an operation of peeling the brake disc 17 from the hoisting machine main body 11 by the peeling portion 25, that is, the braking plate 21 of the rotary shaft 14. An operation of reciprocating along the axial direction is executed at a predetermined cycle. In this manner, by periodically repeating the peeling operation of the brake disc 17, it is possible to avoid the friction lining 19 of the brake disc 17 sticking to the hoisting machine body 11. Further, even if the friction lining 19 of the brake disc 17 is stuck to the hoisting machine main body 11, the brake disc 17 can be peeled off from the hoisting machine main body 11 before the degree of sticking increases. . It should be noted that the cycle for performing the peeling operation of the brake disk 17 can be changed as appropriate, for example, several seconds, minutes, hours, days, etc.

(Fourth embodiment)
As illustrated in FIG. 7, the elevator braking device 10 includes a peeling detection unit 40. In this case, the peeling detection unit 40 is configured by a switch type sensor and is provided in the coil case unit 20 of the braking unit 18. In the braking state in which the brake plate 21 is pushed out to the hoisting machine main body 11 side, the brake plate 21 is separated from the switch 40a of the peeling detection unit 40, and the peeling detection unit 40 is turned off. When the brake plate 21 is pulled toward the coil case portion 20, that is, when the brake disk 17 is peeled off from the hoisting machine main body 11, the brake plate 21 pushes the switch 40a of the peeling detection unit 40 and peels it off. The detection unit 40 is turned on. Thereby, the peeling detection unit 40 detects that the brake disc 17 has been peeled off from the hoisting machine main body 11.

  Unless the brake disk 17 is peeled off from the hoisting machine main body 11, the peeling portion 25 and the brake plate 21 cannot move to the coil case portion 20 side, and accordingly, the switch of the peeling detection portion 40 is switched by the braking portion 21. 40a cannot be pushed in. Therefore, the peeling detection unit 40 can detect that the brake disc 17 has been peeled off from the hoisting machine main body 11 when the switch 40a is pushed in and turned on.

  According to the present embodiment, it is possible to detect that the brake disc 17 has been peeled off from the hoisting machine main body 11 by the peeling detection unit 40. Therefore, based on the detection result of the peeling detection unit 40, for example, it is possible to automatically perform control such as repeating the peeling operation or stopping the peeling operation.

(Fifth embodiment)
As illustrated in FIG. 8, the elevator braking device 10 is provided with a locked portion 50 at the peripheral end portion of the brake disc 17. The locked portion 50 is not provided with the friction lining 19 and the end face of the brake disc 17 is exposed. When the braking state by the braking portion 18 is released, the claw portion 25b of the peeling portion 25 is locked to the locked portion 50 as the braking plate 21 moves to the coil case portion 20 side. Then, the brake disc 17 is peeled off from the hoisting machine main body 11. Therefore, according to this structure, it can avoid that the friction lining 19 is damaged by the nail | claw part 25b.

(Sixth embodiment)
As illustrated in FIG. 9, the elevator braking device 10 is provided with a groove 60 on the peripheral end surface of the brake disk 17. The groove portion 60 is continuously provided along the circumferential direction of the brake disc 17. The claw portion 25b of the peeling portion 25 is inserted into the groove portion 60. The claw portion 25 b of the peeling portion 25 has a gap between the inner wall surface and the bottom wall surface of the groove portion 60. When the braking state by the braking portion 18 is released, the claw portion 25b of the peeling portion 25 moves on the coil case portion 20 side of the groove portion 60 as the braking plate 21 moves to the coil case portion 20 side. The brake disc 17 is pulled off from the hoisting machine main body 11 while being locked to the inner wall surface. Also according to the present embodiment, the brake disc 17 stuck to the hoisting machine main body 11 can be peeled off and returned to a rotatable state, and the occurrence of an event that makes it impossible to raise and lower the elevator car is avoided. Can do.

(Other embodiments)
The present embodiment is not limited to the above-described embodiment, and can be expanded or modified as follows, for example.
For example, the brake disk 17 may be configured to include the friction lining 19 only on the end surface facing at least the hoisting machine main body 11. Further, the elevator braking device 10 is not limited to the configuration including the two braking portions 18, and may be configured to include one braking portion 18, or may be configured to include three or more braking portions 18. Also good. Moreover, you may implement combining several embodiment mentioned above suitably.

  This embodiment is presented as an example and is not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. This embodiment and its modifications are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

  In the drawings, 10 is an elevator braking device, 11 is a hoisting machine main body, 16 is a rope, 17 is a brake disk, 18 is a braking part, 19 is a friction lining, 25 is a peeling part, 30 is a releasing part, and 40 is a pulling part. A peeling detection part is shown.

Claims (6)

A hoisting machine body for rotating a rope for raising and lowering an elevator car;
A disc-shaped brake disc that is provided opposite to the hoisting machine main body and rotates as the elevator car moves up and down;
A friction lining provided on at least an end surface of the brake disk facing the hoisting machine body in both axial end surfaces;
A braking unit that brakes the lifting and lowering of the elevator car by pressing the brake disc against the hoisting machine main body side;
Along with the release of the braking state by the braking part, a peeling part for peeling the brake disc from the hoisting machine main body,
An elevator braking device comprising: The friction lining is also provided on an end surface of the brake disc facing the braking portion among both axial end surfaces of the brake disc,
The elevator braking device according to claim 1, further comprising a push-off portion that pushes the brake disc away from the brake portion when the braking state by the brake portion is released.   The elevator braking device according to claim 1 or 2, wherein an operation of peeling the brake disc from the hoist main body by the peeling portion is executed at a predetermined cycle.   The elevator braking device according to any one of claims 1 to 3, further comprising a peeling detection unit that detects that the brake disc has been peeled off from the hoisting machine main body.   The said peeling part latches to the part in which the said friction lining is not provided among the said brake discs, and peels off the said brake disc from the said winding machine main body. Elevator braking device. A groove is provided on the peripheral end surface of the brake disc,
The elevator braking device according to any one of claims 1 to 5, wherein the peeling portion is engaged with the groove portion and peels the brake disc from the hoisting machine main body.

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