EP1923345A1 - Dispositif de freinage pour ascenseur - Google Patents

Dispositif de freinage pour ascenseur Download PDF

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Publication number
EP1923345A1
EP1923345A1 EP05781944A EP05781944A EP1923345A1 EP 1923345 A1 EP1923345 A1 EP 1923345A1 EP 05781944 A EP05781944 A EP 05781944A EP 05781944 A EP05781944 A EP 05781944A EP 1923345 A1 EP1923345 A1 EP 1923345A1
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EP
European Patent Office
Prior art keywords
electromagnetic coil
energization
braking
electromagnetic coils
brake
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP05781944A
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German (de)
English (en)
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EP1923345A4 (fr
EP1923345B1 (fr
Inventor
Masunori Shibata
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Mitsubishi Electric Corp
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Mitsubishi Electric Corp
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Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
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Publication of EP1923345A4 publication Critical patent/EP1923345A4/fr
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B1/00—Control systems of elevators in general
    • B66B1/24—Control systems with regulation, i.e. with retroactive action, for influencing travelling speed, acceleration, or deceleration
    • B66B1/28—Control systems with regulation, i.e. with retroactive action, for influencing travelling speed, acceleration, or deceleration electrical
    • B66B1/32—Control systems with regulation, i.e. with retroactive action, for influencing travelling speed, acceleration, or deceleration electrical effective on braking devices, e.g. acting on electrically controlled brakes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
    • B66B5/02—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
    • B66B5/02—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions
    • B66B5/16—Braking or catch devices operating between cars, cages, or skips and fixed guide elements or surfaces in hoistway or well
    • B66B5/18—Braking or catch devices operating between cars, cages, or skips and fixed guide elements or surfaces in hoistway or well and applying frictional retarding forces
    • B66B5/185—Braking or catch devices operating between cars, cages, or skips and fixed guide elements or surfaces in hoistway or well and applying frictional retarding forces by acting on main ropes or main cables

Definitions

  • the present invention relates to a brake device for an elevator for braking the raising/lowering of a car and a counterweight.
  • a brake device for an elevator having a structure in which a disc rotating integrally with a motor shaft is clamped between a plate and an armature so that rotation of the disc is braked.
  • the plate and the armature are provided respectively with shock absorbing materials for abating impact noise during braking (see Patent Document 1).
  • Patent Document 1 JP 2003-184919 A
  • the conventional brake device for the elevator requires the shock absorbing materials for abating impact noise, and hence entails an increase in the cost of manufacturing.
  • the present invention has been made to solve the above-mentioned problem, and it is therefore an obj ect of the present invention to obtain a brake device for an elevator which makes it possible to abate noise generated during braking operation and reduce the cost of manufacturing.
  • a brake device for an elevator includes: a rotating body; a braking body displaceable between a braking position at which the braking body is in contact with the rotating body and an open position at which the braking body is spaced apart 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 electromagnetic coil for generating an electromagnetic suction force through energization and a second electromagnetic coil for generating an electromagnetic suction force through energization, for displacing the braking body to the open position through generation of the electromagnetic suction forces against an urging force exerted by the urging body; and a brake control device for controlling energization of the first electromagnetic coil and energization of the second electromagnetic coil respectively.
  • the brake control device performs different types of energization control for the first electromagnetic coil and the second electromagnetic coil when displacing the braking body.
  • Fig. 1 is a schematic diagram showing an elevator according to Embodiment 1 of the present invention.
  • a car 2 and a counterweight 3 are provided within a hoistway 1 in such a manner that the car 2 and the counterweight 3 can be raised/lowered.
  • a hoisting machine (drive device) 4 for raising/lowering the car 2 and the counterweight 3 is provided in an upper portion of the hoistway 1.
  • the hoisting machine 4 has a hoisting machine body 5, and a drive sheave 6 rotated by the hoisting machine body 5.
  • a plurality of main ropes 7 are looped around the drive sheave 6.
  • the car 2 and the counterweight 3 are suspended within the hoistway 1 by means of the respective main ropes 7.
  • the car 2 and the counterweight 3 are raised/lowered within the hoistway 1 through rotation of the drive sheave 6.
  • the brake device 8 has a brake device body 9 mounted on the hoisting machine body 5, and a brake control device 10 for controlling the operation of the brake device body 9.
  • Fig. 2 is a lateral sectional view showing the brake device body 9 of Fig. 1 .
  • the hoisting machine body 5 has a motor 11.
  • the motor 11 has a motor shaft 12 rotated integrally with the drive sheave 6.
  • a cover plate 13 is fixed to the motor 11 via a plurality of rods 14 disposed parallel to the motor shaft 12. Thus, the cover plate 13 is disposed apart from the motor 11 in an axial direction of the motor shaft 12.
  • the brake device body 9 is disposed between the motor 11 and the cover plate 13.
  • the brake device body 9 has a first brake disc (rotating body) 15 and a second brake disc (rotating body) 16, a first braking body 17 and a second braking body 18, a plurality of springs (urging bodies) 19, and an electromagnet 20.
  • the first brake disc 15 and the second brake disc 16 can rotate integrally with the motor shaft 12.
  • Each of the first braking body 17 and the second braking body 18 is displaceable between a braking position at which each of the first braking body 17 and the second braking body 18 is in contact with at least one of the first brake disc 15 and the second brake disc 16, and an open position at which each of the first braking body 17 and the second braking body 18 is spaced apart from the first brake disc 15 and the second brake disc 16.
  • the springs 19 urge each of the first braking body 17 and the second braking body 18 toward the braking position.
  • the electromagnet 20 is designed to displace each of the first braking body 17 and the second braking body 18 to the open position against urging forces of the respective springs 19.
  • the first brake disc 15 and the second brake disc 16 are provided on the motor shaft 12 via a spline hub 21.
  • the first brake disc 15 and the second brake disc 16 are displaceable with respect to the motor shaft 12 in the axial direction of the motor shaft 12, and fixed to the motor shaft 12 in a rotational direction of the motor shaft 12.
  • the first brake disc 15 and the second brake disc 16 are disposed apart from each other in the axial direction of the motor shaft 12. In this example, the first brake disc 15 is disposed further apart from the cover plate 13 than the second brake disc 16.
  • the first braking body 17 and the second braking body 18 are disposed apart from each other in the axial direction of the motor shaft 12. In this example, the first braking body 17 is disposed further apart from the cover plate 13 than the second braking body 18 .
  • the first brake disc 15 is disposed between the first braking body 17 and the second braking body 18, and the second brake disc 16 is disposed between the second braking body 18 and the cover plate 13.
  • each of the first braking body 17 and the second braking body 18 is displaced toward the cover plate 13 while pressing a corresponding one of the first brake disc 15 and the second brake disc 16.
  • each of the first braking body 17 and the second braking body 18 is displaced away from the cover plate 13 and hence spaced apart from a corresponding one of the first brake disc 15 and the second brake disc 16.
  • the first braking body 17 has a discoid armature 22 slidably supported by the respective rods 14, and a sliding material 23 provided on the armature 22 and brought into contact with the first brake disc 15 when the first braking body 17 is at the braking position.
  • the second braking body 18 has a discoid movable plate 24 slidably supported by the respective rods 14, and slidingmaterials 25 and 26 provided on the movable plate 24 and brought into contact with the first brake disc 15 and the second brake disc 16, respectively, when the second braking body 18 is at the braking position.
  • the cover plate 13 is provided with a sliding material 27 brought into contact with the second brake disc 16 when each of the first braking body 17 and the second braking body 18 is at the braking position.
  • the electromagnet 20 is fixed to the motor 11.
  • Each of the springs 19 is disposed in a compressed state between the electromagnet 20 and the armature 22.
  • the first braking body 17 is urged away from the electromagnet 20 by the respective springs 19.
  • Fig. 3 is a schematic diagram showing the electromagnet 20 of Fig. 2 .
  • the electromagnet 20 has a columnar fixed core 28 ( Fig. 2 ) fixed to the motor 11, and a pair of first electromagnetic coils 29 and a pair of second electromagnetic coils 30 for generating electromagnetic suction forces for sucking the armature 22 through energization.
  • the first electromagnetic coils 29 and the second electromagnetic coils 30 are disposed on a plane perpendicular to a direction in which the first braking body 17 is displaced.
  • the first electromagnetic coils 29 and the second electromagnetic coils 30 are alternately disposed at equal intervals in a circumferential direction of the fixed core 28.
  • the respective first electromagnetic coils 29 are disposed symmetrically with respect to an axis of the motor shaft 12, and the respective second electromagnetic coils 30 are disposed symmetrically with respect to the axis of the motor shaft 12.
  • the respective first electromagnetic coils 29 are supplied with power from a first power supply 31, and the respective electromagnetic coils 30 are supplied with power from a second power supply 32.
  • An amount of energization of each of the first electromagnetic coils 29 through the supply of power from the first power supply 31 is measured by a first current detector (CT) 33
  • an amount of energization of each of the second electromagnetic coils 30 through the supply of power from the second power supply 32 is measured by a second current detector (CT) 34.
  • CT current detector
  • an operation control device (not shown) for controlling the operation of the elevator is electrically connected to the brake control device 10.
  • Pieces of information are input to the brake control device 10 from the first current detector 33, the second current detector 34, and the operation control device, respectively.
  • the brake control device 10 controls energization of the first electromagnetic coils 29 and energization of the second electromagnetic coils 30 based on the pieces of information obtained from the first current detector 33, the second current detector 34, and the operation control device, respectively.
  • the brake control device 10 outputs a voltage command for the first electromagnetic coils 29 to the first power supply 31, and a voltage command for the second electromagnetic coils 30 to the second power supply 32.
  • the first power supply 31 applies to each of the first electromagnetic coils 29 a voltage corresponding to a value of the voltage command for the first electromagnetic coils 29, and the second power supply 32 applies to each of the second electromagnetic coils 30 a voltage corresponding to a value of the voltage command for the second electromagnetic coils 30. That is, the brake control device 10 outputs the voltage commands for the first electromagnetic coils 29 and the second electromagnetic coils 30, respectively, thereby controlling energization of the first electromagnetic coils 29 and energization of the second electromagnetic coils 30.
  • the brake control device 10 When operating the brake device body 9, the brake control device 10 performs different types of energization control for the first electromagnetic coils 29 and the second electromagnetic coils 30, respectively. That is, when operating the brake device body 9, the brake control device 10 controls the amount of energization of the first electromagnetic coils 29 and the amount of energization of the second electromagnetic coils 30 such that electromagnetic suction forces thereof become out of balance with each other.
  • the brake control device 10 when operating the brake device body 9, the brake control device 10 performs different types of energization control for the first electromagnetic coils 29 and the second electromagnetic coils 30 such that the first braking body 17 yields due to the urging forces exerted by the respective springs 19 and electromagnetic suction forces generated by the first electromagnetic coils 29 and the second electromagnetic coils 30.
  • Fig. 4 is a schematic diagram showing the braking device body 9 at a time when each of the first braking body 17 and the second braking body 18 of Fig. 2 is at the braking position.
  • the first electromagnetic coils 29 and the second electromagnetic coils 30 have been stopped from being energized
  • the first braking body 17, the first brake disc 15, the second braking body 18, and the second brake disc 16 are pressed against the cover plate 13 while overlapping with one another in the axial direction of the motor shaft 12 due to urging forces of the respective springs 19.
  • the sliding materials 23 and 25 are in contact with the first brake disc 15, and the sliding materials 26 and 27 are in contact with the second brake disc 16, so rotation of each of the first brake disc 15 and the second brake disc 16 is braked.
  • Fig. 5 is a schematic diagram showing the brake device body 9 at a time when each of the first braking body 17 and the second braking body 18 of Fig. 4 is at the open position.
  • the first electromagnetic coils 29 and the second electromagnetic coils 30 are energized, the first braking body 17 is sucked by the electromagnet 20 and has been displaced away from the cover plate 13.
  • the braking of each of the first brake disc 15 and the second brake disc 16 is cancelled.
  • Fig. 6 is a graphical representation for explaining the operation of the brake device 8 of Fig. 3 .
  • Fig. 6(a) is a graph showing a relationship between a brake opening command and a time in the operation control device.
  • Fig. 6 (b) is a graph showing a relationship between a voltage command for the first electromagnetic coils 29 and a time.
  • Fig. 6(c) is a graph showing a relationship between a voltage command for the second electromagnetic coils 30 and a time.
  • Fig. 6(d) is a graph showing a relationship between an amount of energization of the first electromagnetic coils 29 and a time.
  • Fig. 6(e) is a graph showing a relationship between an amount of energization of the second electromagnetic coils 30 and a time.
  • the brake opening command is output from the operation control device to the brake control device 10 ( Fig. 6(a) ).
  • the voltage commands for the first electromagnetic coils 29 and the second electromagnetic coils 30 are simultaneously output from the brake control device 10 to the first power supply 31 and the second power supply 32, respectively ( Figs. 6(b) and 6(c) ), so the first electromagnetic coils 29 and the second electromagnetic coils 30 are supplied with power.
  • the amounts of energization of the first electromagnetic coils 29 and the second electromagnetic coils 30 increase.
  • T2 Figs. 6(d) and 6(e)
  • each of the first braking body 17 and the second braking body 18 is displaced to the open position ( Fig. 5 ), so the braking of each of the first brake disc 15 and the second brake disc 16 is cancelled.
  • the brake opening command is stopped from being output from the operation control device ( Fig. 6 (a) ) .
  • the voltage command for the first electromagnetic coils 29 is first stopped from being output from the brake control device 10 ( Fig. 6(b) ).
  • the voltage command for the second electromagnetic coils 30 is stopped from being output with a delay of a time T ( Fig. 6 (c) ) .
  • energization of the first electromagnetic coils 29 and energization of the second electromagnetic coils 30 are controlled respectively by the brake control device 10 such that a timing for stopping energization- of the first electromagnetic coils 29 and a timing for stopping energization of the second electromagnetic coils 30 become different from each other.
  • the amount of energization of the second electromagnetic coils 30 starts decreasing after the lapse of the time T from a timing when the amount of energization of the first electromagnetic coils 29 starts decreasing ( Figs. 6(d) and 6(e) ).
  • the electromagnetic suction force of each of the first electromagnetic coils 29 whose amount of energization starts decreasing first is weaker than the electromagnetic suction force of each of the second electromagnetic coils 30, so that a portion of the first braking body 17 which is sucked by the first electromagnetic coils 29 first moves away from the electromagnet 20.
  • the first braking body 17 yields.
  • Fig. 7 is a schematic diagram showing the braking device body 9 at a time when the first braking body 17 of Fig. 5 yields.
  • the clearance between a certain portion of the first braking body 17 and the first brake disc 15 becomes narrower as the degree of yield of that portion of the first braking body 17 increases. That is, the clearance between the first braking body 17 and the brake disc 15 is partially narrow.
  • the brake control device 10 performs the different types of energization control for the first electromagnetic coils 29 and the second electromagnetic coils 30 when displacing the first braking body 17, so the magnitude of the electromagnetic suction forces of the first electromagnetic coils 29 and the magnitude of the electromagnetic suction forces of the second electromagnetic coils 30 can be made different from each other when displacing the first braking body 17.
  • displacement of the entire first braking body 17 to the braking position can be started after the first braking body 17 has been partially spaced apart from the electromagnet 20 due to the urging forces of the respective springs 19.
  • the speed of the first braking body 17 when reaching the braking position can be reduced, so impact noise generated during braking operation of the brake device body 9 can be abated. Further, no shock absorbing material for absorbing a shock is required, so a reduction in the cost of manufacturing can also be achieved.
  • the brake control device 10 performs energization control such that the timing for stopping energization of the first electromagnetic coils 29 and the timing for stopping energization of the second electromagnetic coils 30 become different from each other, so the magnitude of the electromagnetic suction forces of the first electromagnetic coils 29 and the magnitude of the electromagnetic suction forces of the second electromagnetic coils 30 can be made different from each other with ease. As a result, impact noise generated during braking operation of the brake device body 9 can be abated.
  • the first braking body 17 During displacement of the first braking body 17 from the open position to the braking position, the first braking body 17 yields due to the electromagnetic suction forces of the first electromagnetic coils 29 and the second electromagnetic coils 30 and the urging forces of the respective springs 19.
  • impact noise generated during the braking operation of the brake device body 9 can be abated, and further, the first braking body 17 can be deformed laterally symmetrically. Consequently, higher stability is guaranteed in performing the braking operation.
  • the timing for stopping energization of the first electromagnetic coils 29 and the timing for stopping energization of the second electromagnetic coils 30 are made different from each other to cause the first electromagnetic coils 29 and the second electromagnetic coils 30 to generate electromagnetic suction forces different in magnitude from each other during the braking operation of the brake device body 9.
  • a length of time from the start of stoppage of a voltage command for the first electromagnetic coils 29 to equalization thereof with 0 and a length of time from the start of stoppage of a voltage command for the second electromagnetic coils 30 to equalization thereof with 0 may be made different from each other to cause the first electromagnetic coils 29 and the second electromagnetic coils 30 to generate electromagnetic suction forces different in magnitude from each other during braking operation of the brake device body 9.
  • Fig. 8 is a graphic representation for explaining the operation of a brake device according to Embodiment 2 of the present invention.
  • Fig. 8 (a) is a graph showing a relationship between a brake opening command and a time in the operationcontroldevice.
  • Fig. 8 (b) is a graph showing a relationship between a voltage command for the first electromagnetic coils 29 and a time.
  • Fig. 8(c) is a graph showing a relationship between a voltage command for the second electromagnetic coils 30 and a time.
  • Fig. 8 (d) is a graph showing a relationship between an amount of energization of the first electromagnetic coils 29 and a time.
  • Fig. 8(e) is a graph showing a relationship between an amount of energization of the second electromagnetic coils 30 and a time.
  • the brake control device 10 starts stopping voltage commands for the first electromagnetic coils 29 and the second electromagnetic coils 30 simultaneously at the time T3 ( Figs. 8(b) and 8(c) ).
  • the brake control device 10 performs control such that the voltage command for the first electromagnetic coils 29 becomes 0 instantaneously upon the start of stoppage of the voltage command, and that the voltage command for the second electromagnetic coils 30 decreases continuously at a certain rate after the start of stoppage of the voltage command and then becomes 0 after a lapse of a predetermined time.
  • the brake control device 10 controls the voltage commands for the first electromagnetic coils 29 and the second electromagnetic coils 30 such that the length of time from the start of stoppage of the voltage command for the first electromagnetic coils 29 to equalization thereof with 0 and the length of time from the start of stoppage of the voltage command for the second electromagnetic coils 30 to equalization thereof with 0 become different from each other.
  • Embodiment 2 of the present invention is identical to Embodiment 1 of the present invention in other constructional details.
  • the brake control device 10 When the operation control device stops outputting the brake opening command ( Fig. 8 (a) ) and the brake device body 9 performs the braking operation, the brake control device 10 performs control to start stopping output of the voltage commands for the first electromagnetic coils 29 and the second electromagnetic coils 30 simultaneously at the time T3. After that, owing to the control performed by the brake control device 10, the voltage command for the first electromagnetic coils 29 becomes 0 instantaneously ( Fig. 8 (b) ), and the voltage command for the second electromagnetic coils 30 decreases continuously, and becomes 0 after the lapse of a predetermined time ( Fig. 8(c) ).
  • the first braking body 17 yields in the same manner as in Embodiment 1 of the present invention.
  • the subsequent operation is the same as that of Embodiment 1 of the present invention.
  • the brake control device 10 performs control such that the length of time from the start of stoppage of the voltage command for the first electromagnetic coils 29 to equalization thereof with 0 and the length of time from the start of stoppage of the voltage command for the second electromagnetic coils 30 to equalization thereof with 0 become different from each other. Therefore, as is the case with Embodiment 1 of the present invention, displacement of the entire first braking body 17 to the braking position can be started after the first braking body 17 has been partially spaced apart from the electromagnet 20. Accordingly, impact noise generated during the braking operation of the brake device body 9 can be abated.
  • the voltage applied to the second electromagnetic coils 30 is continuously reduced at a certain rate during braking operation of the brake device body 9.
  • the voltage applied to the second electromagnetic coils 30 may be reduced continuously at a certain rate after having been reduced instantaneously to a value set in advance.
  • Fig. 9 is a graphic representation for explaining the operation of a brake device according to Embodiment 3 of the present invention.
  • Fig. 9 (a) is a graph showing a relationship between a brake opening command and a time in the operationcontroldevice.
  • Fig. 9 (b) is a graph showing a relationship between a voltage command for the first electromagnetic coils 29 and a time.
  • Fig. 9(c) is a graph showing a relationship between a voltage command for the second electromagnetic coils 30 and a time.
  • Fig. 9 (d) is a graph showing a relationship between an amount of energization of the first electromagnetic coils 29 and a time.
  • Fig. 9(e) is a graph showing a relationship between an amount of energization of the second electromagnetic coils 30 and a time.
  • the brake control device 10 starts stopping voltage commands for the first electromagnetic coils 29 and the second electromagnetic coils 30 simultaneously at the time T3 ( Figs. 9(b) and 9(c) ).
  • the brake control device 10 performs control such that the voltage command for the first electromagnetic coils 29 becomes 0 instantaneously upon the start of stoppage of the voltage command, and that the voltage command for the second electromagnetic coils 30 decreases instantaneously to the value set in advance after the start of stoppage of the voltage command, then decreases continuously at a certain rate, and becomes 0 after the lapse of a predetermined time.
  • the set value is between a maximum value (predetermined value) of the voltage command for the second electromagnetic coils 30 and 0.
  • Embodiment 3 of the present invention is identical to Embodiment 1 of the present invention in other constructional details.
  • the brake control device 10 When the operation control device stops outputting the brake opening command ( Fig. 9 (a) ) and the brake device body 9 performs the braking operation, the brake control device 10 performs control to start stopping the voltage commands for the first electromagnetic coils 29 and the second electromagnetic coils 30 simultaneously at the time T3. After that, owing to the control performed by the brake control device 10, the voltage command for the first electromagnetic coils 29 becomes 0 instantaneously ( Fig. 9(b) ). On the other hand, the voltage command for the second electromagnetic coils 30 decreases instantaneously to the set value and then decreases continuously at a certain rate, and becomes 0 after the lapse of a predetermined time ( Fig. 8(c) ).
  • the first braking body 17 yields in the same manner as in Embodiment 1 of the present invention.
  • the subsequent operation is the same as that of Embodiment 1 of the present invention.
  • the brake control device 10 performs control such that the length of time from the start of stoppage of the voltage command for the first electromagnetic coils 29 to equalization thereof with 0 and the length of time from the start of stoppage of the voltage command for the second electromagnetic coils 30 to equalization thereof with 0 become different from each other. Therefore, as is the case with Embodiment 2 of the present invention, impact noise generated during the braking operation of the brake device body 9 can be abated.
  • the voltage command for the second electromagnetic coils 30 decreases instantaneously to the set value and then decreases continuously at a certain rate.
  • the voltage command for the second electromagnetic coils 30 can be reduced instantaneously to a minimum value of the voltage command allowing the first braking body 17 to be held at the braking position. As a result, a reduction in the operation time of the brake device body 9 can also be achieved.
  • Embodiment 1 of the present invention only the timing for stopping energization of the first electromagnetic coils 29 and the timing for stopping energization of the second electromagnetic coils 30 are made different from each other to abate impact noise during braking operation of the brake device body 9.
  • the timing for starting energization of the first electromagnetic coils 29 and the timing for starting energization of the second electromagnetic coils 30 may be made different from each other to abate impact noise during opening operation of the brake device body 9 as well.
  • Fig. 10 is a graphic representation for explaining the operation of a brake device according to Embodiment 4 of the present invention.
  • Fig. 10(a) is a graph showing a relationship between a brake opening command and a time in the operation control device.
  • Fig. 10(b) is a graph showing a relationship between a voltage command for the first electromagnetic coils 29 and a time.
  • Fig. 10(c) is a graph showing a relationship between a voltage command for the second electromagnetic coils 30 and a time.
  • Fig. 10(d) is a graph showing a relationship between an amount of energization of the first electromagnetic coils 29 and a time.
  • Fig. 10(e) is a graph showing a relationship between an amount of energization of the second electromagnetic coils 30 and a time.
  • Embodiment 4 of the present invention is identical to Embodiment 1 of the present invention in other constructional details.
  • the brake control device 10 receives the brake opening command from the operation control device, only the voltage command for the first electromagnetic coils 29 is first output from the brake control device 10 ( Fig. 10(b) ). After that, the voltage command for the second electromagnetic coils 30 is output with a delay of the time T, namely, at a time T6 ( Fig. 10(c) ). Thus, energization of the second electromagnetic coils 30 is started after the lapse of the time T from a timing when energization of the first electromagnetic coils 29 is started ( Figs. 10 (d) and 10 (e) ).
  • the brake control device 10 controls energization of the first electromagnetic coils 29 and energization of the second electromagnetic coils 30 such that the timing for starting energization of the first electromagnetic coils 29 and the timing for starting energization of the second electromagnetic coils 30 become different from each other.
  • the amount of energization of the first electromagnetic coils 29 and the amount of energization of the second electromagnetic coils 30 increase respectively, so only the portion of the first braking body 17 which is sucked by the first electromagnetic coils 29 first overcomes the urging forces of the respective springs 19 to be displaced toward the electromagnet 20 while the portion of the first braking body 17 which is sucked by the second electromagnetic coils 30 remains at the braking position.
  • the first braking body 17 yields.
  • the brake control device 10 performs control such that the timing for starting energization of the first electromagnetic coils 29 and the timing for starting energization of the second electromagnetic coils 30 become different from each other. Therefore, during the opening operation of the brake device body 9 as well, the magnitude of the electromagnetic suction forces of the first electromagnetic coils 29 and the magnitude of the electromagnetic suction forces of the second electromagnetic coils 30 can be made different from each other with ease. Thus, impact noise resulting from the operation of the brake device body 9 can be abated.
  • each of the voltage commands for the first electromagnetic coils 29 and the second electromagnetic coils 30 reaches its maximum value (predetermined value) instantaneously after the start of the outputting thereof from the brake control device 10.
  • the length of time from the start of the outputting of the voltage command for the first electromagnetic coils 29 to equalization thereof with its maximum value and the length of time from the start of the outputting of the voltage command for the second electromagnetic coils 30 to equalization thereof with its maximum value may be made different from each other to abate impact noise during the opening operation of the brake device body 9 as well.
  • Fig. 11 is a graphic representation for explaining the operation of a brake device according to Embodiment 5 of the present invention.
  • Fig. 11(a) is a graph showing a relationship between a brake opening command and a time in the operation control device.
  • Fig. 11(b) is a graph showing a relationship between a voltage command for the first electromagnetic coils 29 and a time.
  • Fig. 11 (c) is a graph showing a relationship between a voltage command for the second electromagnetic coils 30 and a time.
  • Fig. 11(d) is a graph showing a relationship between an amount of energization of the first electromagnetic coils 29 and a time.
  • Fig. 11(e) is a graph showing a relationship between an amount of energization of the second electromagnetic coils 30 and a time.
  • the brake control device 10 starts outputting voltage commands for the first electromagnetic coils 29 and the second electromagnetic coils 30 simultaneously upon receiving a brake opening command from the operation control device.
  • the brake control device 10 performs control such that the voltage command for the first electromagnetic coils 29 reaches its maximum value instantaneously after the start of the outputting of the voltage command, and that the voltage command for the second electromagnetic coils 30 rises continuously at a certain rate after the start of the outputting of the voltage command and then reaches its maximum value after the lapse of a predetermined time.
  • the brake control device 10 controls the voltage commands for the first electromagnetic coils 29 and the second electromagnetic coils 30 such that the length of time from the start of the outputting of the voltage command for the first electromagnetic coils 29 to equalization thereof with its maximum value and the length of time from the start of the outputting of the voltage command for the second electromagnetic coils 30 to equalization thereof with its maximum value become different from each other.
  • Embodiment 5 of the present invention is identical to Embodiment 2 of the present invention in other constructional details.
  • the brake control device 10 Upon receiving the brake opening command from the operation control device, the brake control device 10 starts outputting the voltage commands for the first electromagnetic coils 29 and the second electromagnetic coils 30 simultaneously. After that, the voltage command for the first electromagnetic coils 29 reaches its maximum value instantaneously ( Fig. 11 (b) ), and the voltage command for the second electromagnetic coils 30 rises continuously at a certain rate and then reaches its maximum value after the lapse of the predetermined time ( Fig. 11 (c) ).
  • the brake control device 10 controls the voltage commands for the first electromagnetic coils 29 and the second electromagnetic coils 30 such that the length of time until the voltage command for the first electromagnetic coils 29 reaches its maximum value and the length of time until the voltage command for the second electromagnetic coils 30 reaches its maximum value become different from each other.
  • the portion of the first braking body 17 which is sucked by the first electromagnetic coils 29 first overcomes the urging forces of the respective springs 19 to be displaced toward the electromagnet 20 while the portion of the first braking body 17 which is sucked by the second electromagnetic coils 30 remains at the braking position.
  • the first braking body 17 yields.
  • the brake control device 10 performs control such that the length of time from the start of the outputting of the voltage command for the first electromagnetic coils 29 from the brake control device 10 to equalization thereof with the predetermined value and the length of time from the start of the outputting of the voltage command for the second electromagnetic coils 30 from the brake control device 10 to equalization thereof with the predetermined value become different from each other. Therefore, during opening operation of the brake device body 9 as well, the electromagnetic suction forces of the first electromagnetic coils 29 and the second electromagnetic coils 30 can be made different in magnitude from each other with ease. Consequently, impact noise resulting from the operation of the brake device body 9 can be abated.
  • the number of the first electromagnetic coils 29 is two, and the number of the second electromagnetic coils 30 is two as well. However, it is also appropriate to provide only one first electromagnetic coil 29 and only one second electromagnetic coil 30, or three or more first electromagnetic coils 29 and three or more second electromagnetic coils 30.
  • the brake control device 10 controls the voltages applied to the first electromagnetic coils 29 and the second electromagnetic coils 30 according to predetermined patterns respectively, thereby changing the amounts of energization of the first electromagnetic coils 29 and the second electromagnetic coils 30, respectively.
  • the brake control device 10 may control the voltages applied to the first electromagnetic coils 29 and the second electromagnetic coils 30 based on pieces of information from the first current detector 33 and the second current detector 34 respectively such that the amounts of energization of the first electromagnetic coils 29 and the second electromagnetic coils 30 change according to predetermined patterns, respectively.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Automation & Control Theory (AREA)
  • Braking Arrangements (AREA)
  • Cage And Drive Apparatuses For Elevators (AREA)
  • Elevator Control (AREA)
EP05781944.3A 2005-09-06 2005-09-06 Dispositif de freinage pour ascenseur Revoked EP1923345B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2005/016308 WO2007029310A1 (fr) 2005-09-06 2005-09-06 Dispositif de freinage pour ascenseur

Publications (3)

Publication Number Publication Date
EP1923345A1 true EP1923345A1 (fr) 2008-05-21
EP1923345A4 EP1923345A4 (fr) 2012-03-07
EP1923345B1 EP1923345B1 (fr) 2013-11-13

Family

ID=37835447

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05781944.3A Revoked EP1923345B1 (fr) 2005-09-06 2005-09-06 Dispositif de freinage pour ascenseur

Country Status (4)

Country Link
EP (1) EP1923345B1 (fr)
JP (1) JP4925105B2 (fr)
CN (1) CN100562476C (fr)
WO (1) WO2007029310A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012152998A3 (fr) * 2011-05-12 2013-01-03 Kone Corporation Frein et procédé de fabrication d'un frein
US8746413B2 (en) 2008-06-03 2014-06-10 Otis Elevator Company Single brakeshoe test (electrical) for elevators
US9637349B2 (en) 2010-11-04 2017-05-02 Otis Elevator Company Elevator brake including coaxially aligned first and second brake members
WO2020127517A1 (fr) * 2018-12-20 2020-06-25 Inventio Ag Procédé et commande de frein pour la commande d'un frein d'une installation d'ascenseur

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10822215B2 (en) 2018-11-26 2020-11-03 Otis Elevator Company Fail safe bar for clutch type brake adjustment
CN111517197B (zh) * 2020-04-29 2021-07-06 佛山市顺德区龙江镇建筑工程有限公司 一种建筑机械用升降机
CN113998557B (zh) * 2022-01-05 2022-03-04 心力电梯科技有限公司 一种电梯安全制动器

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JP2005126183A (ja) * 2003-10-23 2005-05-19 Mitsubishi Electric Corp エレベータのブレーキ制御装置
EP1544148A1 (fr) * 2002-09-27 2005-06-22 Mitsubishi Denki Kabushiki Kaisha Commande de frein d'ascenseur

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EP1431226A1 (fr) * 2001-09-28 2004-06-23 Mitsubishi Denki Kabushiki Kaisha Unite de commande de frein d'ascenseur
EP1544148A1 (fr) * 2002-09-27 2005-06-22 Mitsubishi Denki Kabushiki Kaisha Commande de frein d'ascenseur
JP2005126183A (ja) * 2003-10-23 2005-05-19 Mitsubishi Electric Corp エレベータのブレーキ制御装置

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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8746413B2 (en) 2008-06-03 2014-06-10 Otis Elevator Company Single brakeshoe test (electrical) for elevators
US9637349B2 (en) 2010-11-04 2017-05-02 Otis Elevator Company Elevator brake including coaxially aligned first and second brake members
WO2012152998A3 (fr) * 2011-05-12 2013-01-03 Kone Corporation Frein et procédé de fabrication d'un frein
CN103518073A (zh) * 2011-05-12 2014-01-15 通力股份公司 电磁制动器、制动器及用于制造制动器的方法
US20140048359A1 (en) * 2011-05-12 2014-02-20 Kone Corporation Electromagnetic brake, a brake, and a method for making a brake
CN103518073B (zh) * 2011-05-12 2016-08-17 通力股份公司 电磁制动器、制动器及用于制造制动器的方法
RU2601488C2 (ru) * 2011-05-12 2016-11-10 Коне Корпорейшн Электромагнитный тормоз, тормоз и способ изготовления тормоза
AU2012252276B2 (en) * 2011-05-12 2017-02-16 Kone Corporation An electromagnetic brake, a brake, and a method for making a brake
US9638272B2 (en) 2011-05-12 2017-05-02 Kone Corporation Electromagnetic brake, a brake, and a method for making a brake
EP2707618B1 (fr) 2011-05-12 2018-12-05 Kone Corporation Frein
WO2020127517A1 (fr) * 2018-12-20 2020-06-25 Inventio Ag Procédé et commande de frein pour la commande d'un frein d'une installation d'ascenseur

Also Published As

Publication number Publication date
EP1923345A4 (fr) 2012-03-07
JP4925105B2 (ja) 2012-04-25
WO2007029310A1 (fr) 2007-03-15
JPWO2007029310A1 (ja) 2009-03-12
EP1923345B1 (fr) 2013-11-13
CN100562476C (zh) 2009-11-25
CN101068737A (zh) 2007-11-07

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