WO2007029310A1

WO2007029310A1 - Brake device for elevator

Info

Publication number: WO2007029310A1
Application number: PCT/JP2005/016308
Authority: WO
Inventors: Masunori Shibata
Original assignee: Mitsubishi Denki Kabushiki Kaisha
Priority date: 2005-09-06
Filing date: 2005-09-06
Publication date: 2007-03-15
Also published as: CN100562476C; EP1923345B1; JP4925105B2; EP1923345A4; EP1923345A1; CN101068737A; JPWO2007029310A1

Abstract

A brake device for an elevator, having a rotating body, a braking body displaceable between a braking position at which the braking body is in contact with the rotating body and a release position at which the braking body is separated from the rotating body, an urging body for urging the braking body in a direction in which the braking body is displaced to the braking position, an electromagnet having a first electromagnet coil and a second electromagnet coil individually producing electromagnetic attraction force when supplied with electricity and displacing the braking body to the release position against the urging force by the urging body, and a brake control device for controlling the supply of electricity to each of the first electromagnet coil and the second electromagnet coil. To displace the braking body, the brake control device performs different electricity supply control for the first electromagnet coil and the second electromagnet coil. When the braking body is displaced between the opening position and the release position, it is deflected by the electromagnetic attraction force of the first and second electromagnetic coils and by the urging force of the urging body. The construction reduces impact noise by displacement of the braking body.

Description

Specification

Elevator brake equipment

Technical field

TECHNICAL FIELD [0001] The present invention relates to an elevator brake device for braking raising and lowering of a car and a counterweight.

Background art

Conventionally, an elevator brake device has been proposed in which a disk rotating integrally with a motor shaft is clamped between a plate and an armature to brake the rotation of the disk. In such a conventional brake device, a cushioning material for reducing impact noise during braking is provided on the plate and armature (see Patent Document 1).

[0003] Patent Document 1: Japanese Unexamined Patent Publication No. 2003-184919

Disclosure of the invention

Problems to be solved by the invention

[0004] However, the conventional elevator brake device requires a cushioning material for reducing the impact noise, which increases the manufacturing cost.

[0005] The present invention has been made to solve the above-described problems, and is an elevator that can reduce noise generated during braking and can reduce manufacturing costs. The purpose is to obtain a braking device. Means for solving the problem

[0006] The elevator braking device according to the present invention includes a rotating body, a braking body that can be displaced between a braking position that contacts the rotating body, and an open position where the rotating body force is released, and the braking body is displaced to the braking position. A first electromagnetic coil and a second electromagnetic coil that generate an electromagnetic attraction force when energized, respectively. On the other hand, an electromagnetic magnet for displacing the brake body to the open position and a brake control device for controlling energization of each of the first electromagnetic coil and the second electromagnetic coil are provided. In addition, different energization controls are performed on the first electromagnetic coil and the second electromagnetic coil. Brief Description of Drawings

FIG. 1 is a schematic configuration diagram showing an elevator according to Embodiment 1 of the present invention.

2 is a side sectional view showing the brake device main body of FIG.

FIG. 3 is a configuration diagram schematically showing the electromagnetic magnet of FIG. 2.

4 is a schematic configuration diagram showing a brake device main body when the first and second braking bodies in FIG. 2 are in a braking position.

FIG. 5 is a schematic configuration diagram showing a brake device body when the first and second braking bodies of FIG. 4 are in an open position.

FIG. 6 is a graph for explaining the operation of the brake device of FIG.

FIG. 7 is a schematic configuration diagram showing a brake device body when the first braking body of FIG. 5 is cramped.

FIG. 8 is a graph for explaining the operation of the brake device according to the second embodiment of the present invention.

FIG. 9 is a graph for explaining the operation of the brake device according to the third embodiment of the present invention.

FIG. 10 is a graph for explaining the operation of the brake device according to the fourth embodiment of the present invention.

FIG. 11 is a graph for explaining the operation of the brake device according to the fifth embodiment of the present invention.

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

Embodiment 1.

FIG. 1 is a schematic configuration diagram showing an elevator according to Embodiment 1 of the present invention. In the figure, a lift 2 and a counterweight 3 are provided in the hoistway 1 so as to be lifted and lowered. At the upper part of the hoistway 1, a lifting machine (driving device) 4 for raising and lowering the force 2 and the counterweight 3 is provided. The lifting machine 4 includes a lifting machine body 5 and a drive sheave 6 that is rotated by the lifting machine body 5. A plurality of main ropes 7 are wound around the drive sheave 6. The force 2 and the counterweight 3 are suspended in the hoistway 1 by the main ropes 7. Or The go 2 and the counterweight 3 are raised and lowered in the hoistway 1 by the rotation of the drive sheave 6.

The rotation of the drive sheave 6 is braked by the brake device 8. The brake device 8 has a brake device body 9 mounted on the lifting machine body 5 and a brake control device 10 for controlling the operation of the brake device body 9.

Here, FIG. 2 is a side sectional view showing the brake device body 9 of FIG. In the figure, the upper machine body 5 has a motor 11. The motor 11 has a motor shaft 12 that rotates together with the drive sheave 6.

A cover plate 13 is fixed to the motor 11 via a plurality of rods 14 arranged in parallel with the motor shaft 12. Thus, the cover plate 13 is arranged away from the motor 11 in the axial direction of the motor shaft 12. The brake device body 9 is arranged between the motor 11 and the cover plate 13!

[0012] The brake device body 9 includes a first brake disk (rotating body) 15 and a second brake disk (rotating body) 16 that can rotate integrally with the motor shaft 12, and first and second brake disks 15, 16 The first brake body 17 and the second brake body 18 that are displaceable between the brake position that contacts at least one of the first brake disk 15 and the first brake disk 15 and the open position where the force is released, 2 Plural springs (biasing bodies) 19 that bias the braking bodies 17, 18 to the braking position, and the first and second braking bodies 17, 18 are displaced to the open position against the biasing force of each spring 19. For having an electromagnetic magnet 20!

The first and second brake disks 15, 16 are provided on the motor shaft 12 via the spline hub 21. As a result, the first and second brake discs 15 and 16 can be displaced with respect to the motor shaft 12 in the axial direction of the motor shaft 12, and can be displaced to the motor shaft 12 in the rotational direction. It is fixed against. The first and second brake discs 15 and 16 are spaced apart from each other in the axial direction of the motor shaft 12, and in this example, the first brake disc 15 is more cover plate than the second brake disc 16. It is located on the side away from 13.

[0014] The first and second braking bodies 17, 18 are arranged at intervals in the axial direction of the motor shaft 12. In this example, the first braking body 17 is disposed on the side farther from the cover plate 13 than the second braking body 18. In addition, between the first braking body 17 and the second braking body 18, the first braking body 17 A brake disk 15 is disposed, and a second brake disk 16 is disposed between the second brake body 18 and the cover plate 13.

[0015] When the first and second brake bodies 17, 18 are displaced to the open position force braking position, the first and second brake bodies 17, 18 are displaced toward the cover plate 13 while pressing the first and second brake discs 15, 16. Is done. Further, the first and second braking bodies 17 and 18 are displaced away from the cover plate 13 by being displaced to the braking position force releasing position, and are opened from the first and second brake disks 15 and 16. Be released.

[0016] The first braking body 17 is provided on the armature 22 with a disk-like armature slidably supported by each rod 14, and the first brake disc 17 when the first braking body 17 is in the braking position. And a sliding member 23 in contact with 15. The second braking body 18 is provided on the movable plate 24 and a disc-like movable plate 24 supported by each rod 14 so as to be slidable. When the second braking body 18 is in the braking position, the first and first braking bodies 18 are provided. 2Sliding members 25 and 26 that contact the brake discs 15 and 16, respectively. The cover plate 13 is provided with a sliding member 27 that contacts the second brake disk 16 when the first and second braking bodies 17 and 18 are in the braking position.

The electromagnetic magnet 20 is fixed to the motor 11. Each spring 19 is disposed between the electromagnetic magnet 20 and the armature 22 in a contracted state. Thereby, the first braking body 17 is urged by the springs 19 in the direction away from the electromagnetic magnet 20.

Here, FIG. 3 is a configuration diagram schematically showing the electromagnetic magnet 20 of FIG. In the figure, the electromagnetic magnet 20 includes a cylindrical fixed core 28 (FIG. 2) fixed to the motor 11, a pair of first electromagnetic coils 29 that generate an electromagnetic attractive force that attracts the armature 22 by energization, and It has a pair of second electromagnetic coils 30! /.

[0019] The first electromagnetic coil 29 and the second electromagnetic coil 30 are arranged on a plane perpendicular to the direction in which the first braking body 17 is displaced. Further, the first electromagnetic coil 29 and the second electromagnetic coil 30 are alternately arranged at equal intervals in the circumferential direction of the fixed core 28. Further, each first electromagnetic coil 29 is arranged symmetrically with respect to the axis of the motor shaft 12, and each second electromagnetic coil 30 is arranged symmetrically with respect to the axis of the motor shaft 12.

[0020] Each first electromagnetic coil 29 is supplied with electric power from the first power source 31, and is supplied to each electromagnetic coil 30. The power from the second power source 32 is supplied. The energization amount from the first power source 31 to each first electromagnetic coil 29 is measured by the first current detector (CT) 33, and the energization amount from the second power source 32 to each second electromagnetic coil 30 is the second current amount. It is now measured by the current detector (CT) 34. Further, the brake control device 10 is electrically connected to an operation control device (not shown) that controls the operation of the elevator.

The brake control device 10 receives information from each of the first current detector 33, the second current detector 34, and the operation control device. In addition, the brake control device 10 controls energization of the first and second electromagnetic coils 29 and 30 based on information from the first current detector 33, the second current detector 34, and the operation control device. It is like that.

The brake control device 10 outputs a voltage command for the first electromagnetic coil 29 to the first power supply 31 and outputs a voltage command for the second electromagnetic coil 30 to the second power supply 32. The first power source 31 applies a voltage corresponding to the voltage command value for the first electromagnetic coil 29 to the first electromagnetic coil 29, and the second power source 32 is a voltage corresponding to the voltage command value for the second electromagnetic coil 30. Is applied to the second electromagnetic coil 30. That is, the brake control device 10 controls the energization of the first and second electromagnetic coils 29 and 30 by outputting voltage commands to the first and second electromagnetic coils 29 and 30, respectively. ing.

The brake control device 10 controls the energization of the first electromagnetic coil 29 and the second electromagnetic coil 30 different from each other when the brake device main body 9 is operated. That is, when operating the brake device body 9, the brake control device 10 determines the amount of energization to the first electromagnetic coil 29 and the amount of energization to the second electromagnetic coil 30 so that the electromagnetic attractive force is unbalanced. It comes to control.

In this example, the brake control device 10 uses the urging force of each spring 19 and the electromagnetic attractive force generated from the first and second electromagnetic coils 29 and 30 when operating the brake device main body 9 to The first electromagnetic coil 29 and the second electromagnetic coil 30 are controlled to be energized differently so that the first braking body 17 is contained.

FIG. 4 is a schematic configuration diagram showing the brake device body 9 when the first and second braking bodies 17 and 18 of FIG. 2 are in the braking position. As shown in the figure, when the energization of the first and second electromagnetic coils 29 and 30 is stopped, the first braking body 17 and the first The brake disc 15, the second brake body 18, and the second brake disc 16 are pressed against the cover plate 13 in a state where they overlap with each other in the axial direction of the motor shaft 12. At this time, the sliding members 23 and 25 are in contact with the first brake disc 15, and the sliding members 26 and 27 are in contact with the second brake disc 16. The first and second brake discs 15, 16 The rotation of is braked.

FIG. 5 is a schematic configuration diagram showing the brake device main body 9 when the first and second braking bodies 17 and 18 of FIG. 4 are in the open position. As shown in the figure, when the first and second electromagnetic coils 29, 30 are energized, the first brake body 17 is attracted by the electromagnetic magnet 20 and displaced in a direction away from the cover plate 13. Yes. As a result, braking on the first and second brake discs 15, 16 is released.

Next, the operation will be described. Fig. 6 is a graph for explaining the operation of the brake device 8 of Fig. 3. Fig. 6 (a) is a graph showing the relationship between the brake release command of the operation control device and time, and Fig. 6 (b). Is a graph showing the relationship between the voltage command for the first electromagnetic coil 29 and time, Fig. 6 (c) is a graph showing the relationship between the voltage command for the second electromagnetic coil 30 and time, and Fig. 6 (d) is the first graph. FIG. 6E is a graph showing the relationship between the energization amount to the electromagnetic coil 29 and time, and FIG. 6E is a graph showing the relationship between the energization amount to the second electromagnetic coil 30 and time.

[0028] As shown in the figure, when the force 2 is stopped on the floor (time TO), the output of the brake release command from the operation control device to the brake control device 10 is stopped ( Figure 6 (a)). At this time, the supply of electric power to the first and second electromagnetic coils 29, 30 is stopped (FIGS. 6 (b) and 6 (c)), and the first and second braking bodies are urged by the urging force of each spring 19. 17 and 18 are displaced to the braking position (Fig. 4). As a result, the rotation of the first and second brake discs 15 and 16 is braked, and the stop position of the force 2 is maintained.

[0029] When the movement of the force 2 is started (time T1), the brake release command is also output to the operation control device force to the brake control device 10 (Fig. 6 (a)). As a result, voltage commands for the first and second electromagnetic coils 29 and 30 are simultaneously output from the brake control device 10 to the first and second power sources 31 and 32 (FIGS. 6B and 6C). )), Electric power is supplied to the first and second electromagnetic coils 29, 30. Thereafter, when the energization amount to the first and second electromagnetic coils 29, 30 increases and time T2 is reached (FIG. 6 (d), FIG. 6 (e)), the first and second braking bodies 17 , 18 are displaced to the open position (Fig. 5) and braking on the first and second brake discs 15, 16 is released. [0030] After that, when the force 2 is moved and the force 2 is stopped again on another floor, the output of the brake release command from the operation control device is stopped (Fig. 6 (a)). . As a result, only the output to the first electromagnetic coil 29 of the voltage command from the brake control device 10 is stopped first (FIG. 6 (b)). Thereafter, when the time T4 is delayed by the time T, the output to the second electromagnetic coil 30 is stopped (FIG. 6 (c)). That is, the energization of each of the first and second electromagnetic coils 29, 30 is different so that the timing of the energization of the first electromagnetic coil 29 is different from the timing of the energization of the second electromagnetic coil 30. Is controlled by the brake control device 10. As a result, the energization amount to the second electromagnetic coil 30 begins to decrease after a time T from when the energization amount to the first electromagnetic coil 29 begins to decrease (FIGS. 6 (d) and 6 (e)).

[0031] After this, when the energization amount to each of the first and second electromagnetic coils 29, 30 continues to decrease and reaches time T5 (Fig. 6 (d), Fig. 6 (e)), 1 While the braking body 17 is attracted by the second electromagnetic coil 30, only the portion attracted by the first electromagnetic coil 29 is separated from the electromagnetic magnet 20 by the urging force of each spring 19. That is, since the electromagnetic attraction force of the first electromagnetic coil 29 whose energization amount has started to decrease first is weaker than the electromagnetic attraction force of the second electromagnetic coil 30, the first electromagnetic coil 29 being attracted by the first electromagnetic coil 29 The part of the braking body 17 moves away from the electromagnetic magnet 20 first. As a result, the first braking body 17 crawls.

Here, FIG. 7 is a schematic configuration diagram showing the brake device body 9 when the first braking body 17 of FIG. As shown in the figure, when the first braking body 17 is stagnant, the distance between the first braking body 17 and the first brake disc 15 is such that the portion where the slack of the first braking body 17 is larger. It ’s getting smaller. That is, the distance between the first braking body 17 and the brake disc 15 is partially reduced.

[0033] Thereafter, when the energization amount to the first and second electromagnetic coils 29, 30 further decreases and approaches 0, the urging force of each spring 19 overcomes the electromagnetic attraction force of the second electromagnetic coil 30, The first and second control bodies 17, 18 are displaced to the braking position. That is, when the distance between the first brake body 17 and the first brake disk 15 is partially reduced, the first brake body 17 starts to shift to the braking position. The brake bodies 17, 18 are displaced to the brake position. As a result, the rotation of the first and second brake disks 15, 16 is braked. In such an elevator brake device 8, the brake control device 10 is different from the first electromagnetic coil 29 and the second electromagnetic coil 30 when the first braking body 17 is displaced. Since energization is controlled, the electromagnetic attractive forces of the first and second electromagnetic coils 29 and 30 when the first braking body 17 is displaced can be made different from each other. Accordingly, the first braking body 17 can be partially separated from the electromagnetic magnet 20 by the urging force of each spring 19, and then the first braking body 17 can be started to be displaced to the braking position. . Therefore, the speed of the first braking body 17 when reaching the braking position can be reduced, and the impact sound generated during the braking operation of the brake device body 9 can be reduced. In addition, since a shock absorbing material for absorbing the shock is not necessary, the manufacturing cost can be reduced.

In addition, the control of energization by the brake control device 10 is such that the timing of stopping energization of the first and second electromagnetic coils 29 and 30 is different from each other. The suction force and the electromagnetic arch I force of the second electromagnetic coil 30 can be easily made different in strength, and the impact sound generated during the braking operation of the brake device body 9 can be reduced.

[0036] When the first braking body 17 is also displaced to the braking position, the first braking body 17 is driven by the electromagnetic attractive force of the first and second electromagnetic coils 29, 30 and the biasing force of each spring 19. Therefore, it is possible to reduce the impact sound generated during the braking operation of the brake device main body 9 and to make the deformation of the first braking body 17 symmetrical. Thus, a more stable braking operation can be performed.

[0037] Embodiment 2.

In the first embodiment, by varying the timing of stopping energization of the first and second electromagnetic coils 29, 30, different electromagnetic attraction forces with different strengths are applied during the braking operation of the brake device body 9. It is generated in the first and second electromagnetic coils 29 and 30 respectively, but the time from the start of voltage command stop to each of the first and second electromagnetic coils 29 and 30 to 0 By making the different from each other, electromagnetic attraction forces having different strengths may be generated in the first and second electromagnetic coils 29 and 30 respectively during the braking operation of the brake device body 9.

That is, FIG. 8 is a diagram for explaining the operation of the brake device according to Embodiment 2 of the present invention. It is a graph of. Fig. 8 (a) is a graph showing the relationship between the brake release command of the operation control device and time, Fig. 8 (b) is a graph showing the relationship between the voltage command for the first electromagnetic coil 29 and time, and Fig. 8 ( c) is a graph showing the relationship between the voltage command for the second electromagnetic coil 30 and time, Fig. 8 (d) is a graph showing the relationship between the amount of current supplied to the first electromagnetic coil 29 and time, and Fig. 8 (e) is 4 is a graph showing the relationship between the amount of current applied to the second electromagnetic coil 30 and time.

[0039] As shown in the figure, the brake control device 10 starts the stop of the voltage command for each of the first and second electromagnetic coils 29, 30 simultaneously at time T3 (FIG. 8 ( b), Figure 8 (c)). The brake control device 10 controls the voltage command for the first electromagnetic coil 29 so that it immediately becomes 0 after the stop of the voltage command is started. Then, the voltage command is stopped and the force is continuously reduced at a constant rate so that it is controlled to zero when a predetermined time has elapsed. That is, the brake control device 10 controls the voltage command for each of the first and second electromagnetic coils 29 and 30 so that the time from when the stop of the voltage command is started until the force becomes zero is different from each other. Become. Other configurations are the same as those in the first embodiment.

[0040] Next, the operation will be described. The opening operation of the brake device main body 9, that is, the operation when the first and second braking bodies 17 and 18 are also displaced to the opening position is the same as that in the first embodiment.

[0041] When the brake release command output from the operation control device is stopped (Fig. 8 (a)) and the brake device main body 9 performs a braking operation, the first and second electromagnetics are controlled by the brake control device 10. The output of the voltage command to each of the coils 29 and 30 is stopped simultaneously at time T3. Thereafter, under the control of the brake control device 10, the voltage command for the first electromagnetic coil 29 instantaneously becomes 0 (FIG. 8 (b)), and the voltage command for the second electromagnetic coil 30 continuously decreases to a predetermined value. It will be 0 when the time has elapsed (Fig. 8 (c)).

[0042] Thus, after the time T3 has elapsed, the energization amounts to the first and second electromagnetic coils 29 and 30 are different from each other (Fig. 8 (d), Fig. 8 (e)). As in the first mode, the first braking body 17 is swollen. The subsequent operation is the same as in the first embodiment.

[0043] In such an elevator brake device, during braking operation of the brake device body 9, the brake control device 10 controls each of the first and second electromagnetic coils 29, 30. Since the time from the start of the voltage command to be stopped until the force becomes zero is different, the first braking body 17 is partially separated from the electromagnetic magnet 20 as in the first embodiment. After that, the displacement of the entire first braking body 17 to the braking position can be started. Therefore, it is possible to reduce the impact sound generated during the braking operation of the brake device body 9.

[0044] Embodiment 3.

In the second embodiment, the voltage applied to the second electromagnetic coil 30 is continuously reduced at a constant rate during the braking operation of the brake device main body 9. However, the second electromagnetic coil 30 Even if the voltage applied to is instantaneously reduced to a preset value, it may be continuously reduced at a constant rate.

That is, FIG. 9 is a graph for explaining the operation of the brake device according to Embodiment 3 of the present invention. Fig. 9 (a) is a graph showing the relationship between the brake release command of the operation control device and time, Fig. 9 (b) is a graph showing the relationship between the voltage command for the first electromagnetic coil 29 and time, and Fig. 9 ( c) is a graph showing the relationship between the voltage command for the second electromagnetic coil 30 and time, Fig. 9 (d) is a graph showing the relationship between the energization amount to the first electromagnetic coil 29 and time, and Fig. 9 (e) is 4 is a graph showing the relationship between the amount of current applied to the second electromagnetic coil 30 and time.

[0046] As shown in the figure, the brake control device 10 is configured to simultaneously start stopping the voltage command for each of the first and second electromagnetic coils 29, 30 at time T3 (FIG. 9 ( b), Figure 9 (c)). The brake control device 10 controls the voltage command for the first electromagnetic coil 29 so that it immediately becomes 0 after the stop of the voltage command is started. After starting to stop the voltage command, reduce it to the set value that was set by force and then reduce it continuously at a constant rate so that it will become 0 when a predetermined time has passed. It comes to control. The set value is a value between 0 and the maximum value (predetermined value) of the voltage command for the second electromagnetic coil 30. Other configurations are the same as those in the first embodiment.

Next, the operation will be described. The opening operation of the brake device main body 9, that is, the operation when the first and second braking bodies 17 and 18 are also displaced to the opening position is the same as that in the first embodiment. [0048] When the brake release command output from the operation control device is stopped (Fig. 9 (a)) and the brake device main body 9 performs a braking operation, the first and second electromagnetics are controlled by the control of the brake control device 10. The voltage command for each of the coils 29 and 30 is stopped simultaneously at time T3. Thereafter, the voltage command to the first electromagnetic coil 29 is instantaneously zero by the control of the brake control device 10 (FIG. 9 (b)). On the other hand, the voltage command for the second electromagnetic coil 30 decreases to the set value instantaneously, then decreases continuously at a constant rate, and becomes 0 when a predetermined time has passed (Fig. 8 (c )).

[0049] Thus, after the time T3 has elapsed, the energization amounts to the first and second electromagnetic coils 29 and 30 are different from each other (Fig. 9 (d), Fig. 9 (e)). As in the first mode, the first braking body 17 is swollen. The subsequent operation is the same as in the first embodiment.

[0050] Even in such an elevator brake device, during the braking operation of the brake device main body 9, the command of the voltage command to each of the first and second electromagnetic coils 29, 30 is controlled by the control of the brake control device 10. Since the time from when the stop is started until the force becomes zero is different from each other, the impact sound generated during the braking operation of the brake device body 9 can be reduced as in the second embodiment. In addition, the voltage command for the second electromagnetic coil 30 is continuously reduced at a constant rate after being instantaneously reduced to the set value during the braking operation of the brake device body 9, so that the first braking body 17 The voltage command for the second electromagnetic coil 30 can be instantaneously reduced to the lowest voltage command value that can hold the brake position at the braking position, and the operation time of the brake device body 9 can be shortened. .

[0051] Embodiment 4.

Further, in the first embodiment, the impact sound during the braking operation of the brake device body 9 is reduced by changing the timing of stopping the energization of the first and second electromagnetic coils 29 and 30 to each other. As shown in the figure, the start of energization of the first and second electromagnetic coils 29, 30 is made different from each other, so that the impact sound can be reduced even when the brake device body 9 is opened. May be.

That is, FIG. 10 is a graph for explaining the operation of the brake device according to Embodiment 4 of the present invention. Fig. 10 (a) is a graph showing the relationship between the brake release command of the operation control device and time, and Fig. 10 (b) shows the relationship between the voltage command for the first electromagnetic coil 29 and time. Fig. 10 (c) is a graph showing the relationship between the voltage command for the second electromagnetic coil 30 and time, and Fig. 10 (d) is a graph showing the relationship between the energization amount to the first electromagnetic coil 29 and time, FIG. 10 (e) is a graph showing the relationship between the energization amount to the second electromagnetic coil 30 and time.

[0053] As shown in the figure, when the brake control device 10 receives the brake release command of the operation control device force, the brake control device 10 starts outputting the voltage command to the first electromagnetic coil 29 and then delays by the time T. 2 Output of voltage command to electromagnetic coil 30 is started. Other configurations are the same as those in the first embodiment.

Next, the operation will be described. When the brake control device 10 receives a brake release command from the operation control device, only the voltage command for the first electromagnetic coil 29 is first output from the brake control device 10 (FIG. 10 (b)). After this, when the time T6 is delayed and the time T6 is reached, a voltage command for the second electromagnetic coil 30 is output (FIG. 10 (c)). As a result, energization to the second electromagnetic coil 30 is started after time T from the start of energization to the first electromagnetic coil 29 (FIG. 10 (d), FIG. 10 (e)). That is, in this example, the first and second electromagnetic coils 29, 30 are different from each other so that the timing of starting energization of the first electromagnetic coil 29 and the timing of starting energization of the second electromagnetic coil 30 are different from each other. The energization of each of these is controlled by the brake control device 10.

[0055] Thereafter, the energization amount to each of the first and second electromagnetic coils 29, 30 increases, and the first braking body 17 first sets the portion attracted by the second electromagnetic coil 30 to the braking position. While remaining, only the portion attracted by the first electromagnetic coil 29 is displaced in a direction to overcome the biasing force of each spring 19 and approach the electromagnetic magnet 20. As a result, the first braking body 17 is retracted.

[0056] Thereafter, the portion attracted by the second electromagnetic coil 30 also overcomes the urging force of each spring 19, and the entire first braking body 17 is displaced to the open position. The subsequent operation is the same as in the first embodiment.

[0057] In such an elevator brake device, the start of energization of each of the first and second electromagnetic coils 29 and 30 is different from each other by the control of the brake control device 10, so that the brake Even when the main unit 9 is opened, the electromagnetic attractive force of the first electromagnetic coil 29 and the electromagnetic arch I force of the second electromagnetic coil 30 can easily be set to different strengths. In addition, it is possible to reduce the impact sound due to the operation of the brake device body 9.

[0058] Embodiment 5.

In the second embodiment, the voltage command for each of the first and second electromagnetic coils 29 and 30 is such that the output from the brake control device 10 is started and the maximum value (predetermined value) is reached instantaneously. It is possible to reduce the impact sound even when the brake device body 9 is released by varying the time from when the output of the voltage command is started until the force reaches the maximum value. .

That is, FIG. 11 is a graph for explaining the operation of the brake device according to the fifth embodiment of the present invention. Fig. 11 (a) is a graph showing the relationship between the brake release command of the operation control device and time, Fig. 11 (b) is a graph showing the relationship between the voltage command for the first electromagnetic coil 29 and time, and Fig. 11 (c) is a graph showing the relationship between the voltage command for the second electromagnetic coil 30 and time, FIG. 11 (d) is a graph showing the relationship between the amount of current supplied to the first electromagnetic coil 29 and time, and FIG. 11 (e). 4 is a graph showing the relationship between the amount of current supplied to the second electromagnetic coil 30 and time.

[0060] As shown in the figure, when the brake control device 10 receives the brake release command of the operation control device force, the brake control device 10 starts to output voltage commands to the first and second electromagnetic coils 29 and 30 simultaneously. It has become. The brake control device 10 controls the voltage command for the first electromagnetic coil 29 so that the output of the voltage command starts to reach the maximum value instantaneously, and the voltage command for the second electromagnetic coil 30 Then, the voltage is continuously increased at a constant rate after the output of the voltage command is started, and control is performed so that the maximum value is reached when a predetermined time has elapsed. That is, the brake control device 10 controls the voltage command for each of the first and second electromagnetic coils 29 and 30 so that the time from when the output of the voltage command is started until the force reaches the maximum value is different from each other. It has become. Other configurations are the same as those in the second embodiment.

Next, the operation will be described. When the brake control device 10 receives a brake release command from the operation control device, the brake control device 10 starts outputting voltage commands to the first and second electromagnetic coils 29 and 30 simultaneously. Thereafter, the voltage command for the first electromagnetic coil 29 instantaneously reaches the maximum value (Fig. 11 (b)), and the voltage command for the second electromagnetic coil 30 continuously increases at a constant rate, and reaches a predetermined value. After the time of The value is reached (Figure ll (c)). That is, in this example, the first time so that the time until the voltage command for the first electromagnetic coil 29 reaches the maximum value is different from the time until the voltage command for the second electromagnetic coil 30 reaches the maximum value. The voltage command for each of the second electromagnetic coils 29 and 30 is controlled by the brake control device 10.

[0062] At this time, the first braking body 17 is attached to each spring 19 only by the portion attracted by the first electromagnetic coil 29 while leaving the portion attracted by the second electromagnetic coil 30 in the braking position. Displaced in a direction to overcome the force and approach the electromagnetic magnet 20. As a result, the first braking body 17 crawls.

[0063] Thereafter, the portion attracted by the second electromagnetic coil 30 also overcomes the urging force of each spring 19, and the entire first braking body 17 is displaced to the open position. The subsequent operation is the same as that of the second embodiment.

[0064] In such an elevator brake device, the control of the brake control device 10 causes the start force of the output of the brake control device 10 to be a predetermined value for the voltage command to each of the first and second electromagnetic coils 29, 30. Since the time to reach them is different from each other, the electromagnetic attraction force of the first electromagnetic coil 29 and the electromagnetic arching I force of the second electromagnetic coil 30 can be obtained even when the brake device body 9 is opened. Different strengths can be easily obtained, and the impact sound due to the operation of the brake device body 9 can be reduced.

In each of the above embodiments, the number of first electromagnetic coils 29 is two, and the number of second electromagnetic coils 30 is also two. Each of first and second electromagnetic coils 29, 30 The number of can be 1 or 3 or more!

In each of the above embodiments, the brake control device 10 controls the voltage applied to each of the first and second electromagnetic coils 29 and 30 according to a predetermined pattern, so that the first and second (2) The energization amount to the electromagnetic coils 29, 30 is changed, but based on the information from the first and second current detectors 33, 34, the first and second electromagnetic coils 29, 30 are The voltage applied to each of the first and second electromagnetic coils 29 and 30 may be controlled so that the energization amount of the coil changes according to a predetermined pattern.

Claims

The scope of the claims

[1] rotating body,

A braking body that is displaceable between a braking position that contacts the rotating body and an open position where the rotating body force is released;

There is provided an urging body that urges the braking body in a direction in which the braking body is displaced to the braking position, a first electromagnetic coil and a second electromagnetic coil that generate an electromagnetic attractive force when energized. An electromagnetic magnet that displaces the braking body to the open position against the urging force of the urging body, and

Brake control device for controlling energization to each of the first electromagnetic coil and the second electromagnetic coil

With

The brake control device controls the energization of the first electromagnetic coil and the second electromagnetic coil different from each other when the braking body is displaced. Brake device.

[2] The brake control device includes the first electromagnetic coil and the second electromagnetic coil so that the first electromagnetic coil and the second electromagnetic coil start and stop at least at different timings. 2. The elevator brake device according to claim 1, wherein energization of each of the two electromagnetic coils is controlled.

[3] When the brake control device starts energization of the first electromagnetic coil and the second electromagnetic coil, the time until the voltage applied to the first electromagnetic coil is changed from 0 to a predetermined value is The voltage applied to each of the first electromagnetic coil and the second electromagnetic coil is controlled so that the voltage applied to the second electromagnetic coil is shorter than the time from 0 to the predetermined value. The elevator braking device according to claim 1, wherein

[4] When the brake control device stops energizing the first electromagnetic coil and the second electromagnetic coil, the time required for the voltage applied to the first electromagnetic coil to become a predetermined value force of 0 is The voltage applied to the second electromagnetic coil is applied to each of the first electromagnetic coil and the second electromagnetic coil so as to be shorter than the time until the predetermined value force becomes zero. 2. The elevator brake device according to claim 1, wherein a voltage to be controlled is controlled.

[5] When the brake control device stops energizing the second electromagnetic coil, the voltage applied to the second electromagnetic coil is instantaneously reduced from a predetermined value to a set value smaller than the predetermined value. 5. The elevator braking device according to claim 4, wherein the braking force is reduced to the set value force 0 over a predetermined period of time.

[6] The braking body is configured so that the brake control device controls the energization of the first electromagnetic coil and the second electromagnetic coil to be different from each other, whereby the electromagnetic arch I force and the additional force are applied. 2. The brake device for an elevator according to claim 1, wherein the brake device is bent by a force! /.