WO2017119079A1 - Dispositif de frein pour treuil d'ascenseur - Google Patents

Dispositif de frein pour treuil d'ascenseur Download PDF

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Publication number
WO2017119079A1
WO2017119079A1 PCT/JP2016/050243 JP2016050243W WO2017119079A1 WO 2017119079 A1 WO2017119079 A1 WO 2017119079A1 JP 2016050243 W JP2016050243 W JP 2016050243W WO 2017119079 A1 WO2017119079 A1 WO 2017119079A1
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WO
WIPO (PCT)
Prior art keywords
brake
car
braking
weight
unit
Prior art date
Application number
PCT/JP2016/050243
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English (en)
Japanese (ja)
Inventor
佳典 谷
Original Assignee
三菱電機株式会社
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 三菱電機株式会社 filed Critical 三菱電機株式会社
Priority to PCT/JP2016/050243 priority Critical patent/WO2017119079A1/fr
Publication of WO2017119079A1 publication Critical patent/WO2017119079A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B11/00—Main component parts of lifts in, or associated with, buildings or other structures
    • B66B11/04—Driving gear ; Details thereof, e.g. seals
    • B66B11/08—Driving gear ; Details thereof, e.g. seals with hoisting rope or cable operated by frictional engagement with a winding drum or sheave
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D49/00—Brakes with a braking member co-operating with the periphery of a drum, wheel-rim, or the like
    • F16D49/16—Brakes with two brake-blocks
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D51/00—Brakes with outwardly-movable braking members co-operating with the inner surface of a drum or the like
    • F16D51/16—Brakes with outwardly-movable braking members co-operating with the inner surface of a drum or the like shaped as brake-shoes pivoted on a fixed or nearly-fixed axis
    • F16D51/18—Brakes with outwardly-movable braking members co-operating with the inner surface of a drum or the like shaped as brake-shoes pivoted on a fixed or nearly-fixed axis with two brake-shoes
    • F16D51/26—Brakes with outwardly-movable braking members co-operating with the inner surface of a drum or the like shaped as brake-shoes pivoted on a fixed or nearly-fixed axis with two brake-shoes both extending in the same direction from their pivots
    • F16D51/28—Brakes with outwardly-movable braking members co-operating with the inner surface of a drum or the like shaped as brake-shoes pivoted on a fixed or nearly-fixed axis with two brake-shoes both extending in the same direction from their pivots mechanically actuated

Definitions

  • the present invention relates to a brake device for an elevator hoisting machine that brakes rotation of a brake drum by pressing a brake shoe against a braking surface of the brake drum.
  • emergency braking by the hoisting machine brake device is performed when a power failure occurs while the car is running and when the car reaches an abnormal speed.
  • the brake torque at this time is a specification that matches the maximum unbalance torque applied to the hoisting machine, that is, the torque applied when the difference between the weight on the car side and the weight on the counterweight side is maximum. ing. For this reason, when the weight on the car side and the weight on the counterweight side are the same, the deceleration of the car at the time of emergency braking increases, and the ride comfort is impaired.
  • the pressing position of the brake pad against the brake disk is variable in the radial direction of the brake disk.
  • the braking torque during braking is relaxed (see, for example, Patent Document 1).
  • the configuration of the brake device of the conventional elevator hoisting machine as described above cannot be applied to a brake device using a brake drum. Further, since the disc brake or the brake pad needs to be moved in parallel to the braking surface of the brake disc, the configuration becomes complicated.
  • the present invention has been made to solve the above-described problems, and is an elevator hoisting machine that can appropriately adjust the brake torque during emergency braking with a simple configuration even when using a brake drum.
  • the purpose is to obtain a brake device.
  • a brake device for an elevator hoisting machine includes a brake drum having a cylindrical braking surface, a brake shoe, a braking spring that presses the braking shoe against the braking surface, and a brake shoe against the braking spring.
  • the brake unit has an electromagnetic magnet that is separated from the braking surface, and a control device that controls the brake unit.
  • the brake unit is configured to change the angle at which the braking spring presses the brake shoe against the braking surface during braking.
  • the controller is rotatable with respect to the drum, and the control device adjusts the rotation angle of the brake unit according to the information related to the weight loaded in the car and the information related to the running direction of the car while the car is running.
  • the brake unit is rotatable with respect to the brake drum, and according to the information on the weight loaded in the car and the information on the traveling direction of the car during the traveling of the car. Since the rotation angle of the brake unit is adjusted, the brake torque at the time of emergency braking can be appropriately adjusted with a simple configuration even in the type using the brake drum.
  • FIG. 3 is a sectional view taken along line III-III in FIG. 2.
  • FIG. 4 is a cross-sectional view showing a state where the brake shoe of FIG. 3 is pulled away from the braking surface. It is sectional drawing which shows the state which rotated the brake unit of FIG. 4 to the horizontal direction. It is sectional drawing which shows the state which carried out the emergency stop of the cage
  • FIG. 3 is a block diagram showing a control system of the position adjusting motor 25 in FIG. 2.
  • FIG. 9 is a cross-sectional view taken along line IX-IX in FIG. 8. It is sectional drawing which shows the state from which the brake shoe of FIG. 8 was pulled away from the braking surface. It is sectional drawing which shows the state which rotated the brake unit of FIG. 10 to the horizontal direction. It is sectional drawing which shows the state which carried out the emergency stop of the cage
  • FIG. 1 is a block diagram showing an elevator according to Embodiment 1 of the present invention.
  • a machine room 2 is provided in the upper part of the hoistway 1.
  • an elevator hoist 3, a deflector 4, and a control device 5 are installed in the machine room 2.
  • the elevator hoisting machine 3 includes a drive sheave 6, a hoisting machine motor (not shown) that rotates the driving sheave 6, and a brake device 21 (FIG. 2) that brakes the rotation of the driving sheave 6.
  • a suspension body 7 is wound around the driving sheave 6 and the deflecting wheel 4. As the suspension body 7, a plurality of ropes or a plurality of belts are used.
  • a car 8 is connected to the first end of the suspension body 7.
  • a counterweight 9 is connected to the second end of the suspension body 7.
  • the car 8 and the counterweight 9 are suspended in the hoistway 1 by the suspension body 7 and are moved up and down in the hoistway 1 by rotating the drive sheave 6.
  • the control device 5 raises and lowers the car 8 at a set speed by controlling the rotation of the elevator hoisting machine 3.
  • a pair of car guide rails 10 that guide the raising and lowering of the car 8 and a pair of counterweight guide rails 11 that guide the raising and lowering of the counterweight 9 are installed.
  • a car buffer 12 and a counterweight buffer 13 are installed at the bottom of the hoistway 1.
  • An emergency stop device 14 that holds the car guide rail 10 and makes the car 8 emergency stop is mounted at the lower part of the car 8.
  • the emergency stop device 14 is provided with an operating lever 15 for operating the emergency stop device 14.
  • the machine room 2 is provided with a governor 16 that monitors whether the car 8 is traveling at an excessive speed.
  • the governor 16 includes a governor sheave 17, an overspeed detection switch, a rope catch, and the like.
  • a governor rope 18 is wound around the governor sheave 17.
  • the governor rope 18 is laid circularly in the hoistway 1 and connected to the operating lever 15.
  • the governor rope 18 is wound around a tension wheel 19 disposed at the lower part of the hoistway 1.
  • the governor rope 18 circulates and the governor sheave 17 rotates at a rotational speed corresponding to the traveling speed of the car 8.
  • the governor 16 mechanically detects that the traveling speed of the car 8 has reached an excessive speed. As the excessive speed to be detected, a first excessive speed Vos that is higher than the rated speed Vr and a second excessive speed Vtr that is higher than the first excessive speed are set.
  • the overspeed detection switch When the traveling speed of the car 8 reaches the first overspeed Vos, the overspeed detection switch is operated. Thereby, the electric power feeding to the elevator hoisting machine 3 is interrupted, and the car 8 is stopped urgently.
  • FIG. 2 is a front view showing the brake device 21 of the elevator hoisting machine 3 of FIG. 1, and FIG. 3 is a cross-sectional view taken along line III-III of FIG. 2, showing a state during normal braking.
  • the brake device 21 includes a brake drum 22 that rotates integrally with the drive sheave 6, and a brake unit 23 provided in the brake drum 22. That is, the brake device 21 of the first embodiment is an internal expansion brake.
  • the brake drum 22 has a cylindrical braking surface 22a.
  • the braking surface 22 a is the inner peripheral surface of the brake drum 22.
  • the brake drum 22 is arranged so that the rotation center C thereof is horizontal.
  • the brake unit 23 includes a shaft 24, a position adjusting motor 25, an electromagnetic magnet 26, a pair of braking springs 27, a pair of movable iron cores 28, a pair of brake arms 29, and a pair of brake shoes 30.
  • the shaft 24 is arranged such that its axis is perpendicular to the rotation center C of the brake drum 22 and is vertical. Further, the shaft 24 rotates around the axis.
  • the position adjustment motor 25 is disposed at the lower end of the shaft 24 and rotates the shaft 24 in response to a command from the control device 5.
  • the electromagnetic magnet 26 has a fixed iron core 31 and a pair of brake coils 32 embedded in both side surfaces of the fixed iron core 31.
  • the movable iron core 28 faces both side surfaces of the fixed iron core 31.
  • the braking spring 27 is interposed between the movable iron core 28 and the fixed iron core 31.
  • the brake shoes 30 are connected to the movable iron core 28 via the brake arms 29, respectively.
  • Each brake spring 27 presses the brake shoe 30 against the braking surface 22a.
  • a lining 30a is provided on the surface of the brake shoe 30 that contacts the braking surface 22a.
  • the electromagnetic magnet 26 pulls the brake shoe 30 away from the braking surface 22 a against the braking spring 27.
  • the brake unit 23 is rotatable with respect to the brake drum 22 about the shaft 24 so that the angle at which the brake spring 27 presses the brake shoe 30 against the braking surface 22a changes during braking.
  • the distance that the lining 30a moves to hit the braking surface 22a at the time of braking that is, the relative distance between the braking unit 23 and the braking surface 22a is changed. Torque changes.
  • Each brake shoe 30 is rotatable with respect to the brake arm 29 about a pin 33 parallel to the shaft 24. For this reason, even when the brake unit 23 is tilted during emergency braking, the lining 30a follows the braking surface 22a.
  • FIG. 4 is a sectional view showing a state in which the brake shoe 30 in FIG. 3 is pulled away from the braking surface 22a
  • FIG. 5 is a sectional view showing a state in which the brake unit 23 in FIG. 4 is rotated in the horizontal direction
  • FIG. It is sectional drawing which shows the state which carried out the emergency stop of the cage
  • FIG. 7 is a block diagram showing a control system of the position adjusting motor 25 of FIG.
  • the control device 5 includes an operation control unit 34 that controls the operation of the car 8 and a brake angle control unit 35 that controls the position adjusting motor 25.
  • the scale device 36 generates a signal corresponding to the weight loaded in the car.
  • a signal from the scale device 36 is input to the control device 5.
  • the brake angle control unit 35 obtains information regarding the traveling direction of the car 8 from the operation control unit 34. Further, the brake angle control unit 35 outputs a command signal to the position adjustment motor 25 during the traveling of the car 8 according to the information related to the weight loaded in the car and the information related to the traveling direction of the car 8, and Adjust the rotation angle.
  • the brake angle control unit 35 moves the brake shoe 30 in a cross section along the rotation center C of the brake drum 22.
  • the direction of pressing against the braking surface 22a is perpendicular to the braking surface 22a, and the brake unit 23 is held at a position where the extension of the braking spring 27 during braking is minimized, that is, the initial position.
  • the brake angle control unit 35 determines that the deceleration generated in the car 8 becomes excessive when the emergency braking is performed while the brake unit 23 is held at the initial position with respect to the condition of the weight loaded in the car and the traveling direction. It is determined whether the condition is satisfied.
  • the brake angle control unit 35 is configured so that, for example, the weight on the car 8 side is larger than the weight on the counterweight 9 side, and the car 8 is traveling upward, and the weight on the car 8 side is on the counterweight 9 side.
  • the brake unit 23 is rotated in the horizontal direction from the initial position. Further, the brake angle control unit 35 rotates the brake unit 23 in the horizontal direction from the initial position when the weight on the car 8 side and the weight on the counterweight 9 side are balanced, for example.
  • the brake angle control unit 35 is configured so that, for example, the weight on the car 8 side is larger than the weight on the counterweight 9 side, and the weight on the car 8 side is the counterweight when the car 8 is traveling downward.
  • the brake unit 23 is kept in the initial position when the weight is smaller than the weight on the 9 side.
  • the brake angle control unit 35 determines that the brake unit immediately before the car 8 stops, for example, when the car 8 starts to decelerate and the car speed becomes a set value or less. 23 is returned to the initial position shown in FIG.
  • the inclination angle ⁇ of the brake unit 23 may be changed stepwise or continuously steplessly depending on the unbalance amount between the weight on the car 8 side and the weight on the counterweight 9 side.
  • the angle ⁇ may be fixed to one angle or may be two or more angles.
  • the control device 5 can be configured by a computer, for example. That is, the functions of the operation control unit 34 and the brake angle control unit 35 can be realized by a computer.
  • the brake unit 23 is moved with respect to the brake drum 22 around the shaft 24 so that the angle at which the brake shoe 30 is pressed against the braking surface 22 a by the braking spring 27 changes during braking.
  • the rotation angle of the brake unit 23 is adjusted according to the information related to the loaded weight in the car and the information related to the traveling direction of the car 8.
  • the brake torque during emergency braking can be appropriately adjusted with a simple configuration by simply rotating the brake unit 23. Thereby, it is possible to suppress the deterioration of the ride comfort of the passenger when the car 8 is brought to an emergency stop.
  • the brake unit 23 is rotated from the initial position.
  • the vehicle 8 since the vehicle 8 is inclined with respect to the initial position, it is possible to more reliably suppress the deterioration of the ride comfort of the passenger when the car 8 is brought to an emergency stop.
  • the weight on the side of the car 8 is larger than the weight on the side of the counterweight 9
  • the weight on the side of the car 8 is smaller than the weight on the side of the counterweight 9 when the car 8 is traveling upward
  • the brake unit 23 is rotated from the initial position and tilted with respect to the initial position, thereby reducing the brake torque during emergency braking when the car 8 is easy to stop. can do.
  • the car 8 is relatively stopped by rotating the brake unit 23 from the initial position and inclining the initial position.
  • the brake torque at the time of emergency braking can be reduced under conditions where it is easy to make it occur.
  • the brake unit 23 when the brake unit 23 is rotated from the initial position while the car 8 is traveling and the car 8 normally stops at the stop floor, the brake unit 23 is returned to the initial position before the car 8 stops.
  • the stationary state can be maintained more reliably. That is, while the car 8 is traveling, the weight loaded in the car is fixed, but it is not yet determined how much weight is loaded on the car 8 that is opened on the stop floor.
  • the maximum brake torque can be generated, and the car 8 can be kept stationary even if the car 8 is overloaded. it can.
  • FIG. 8 is a front view showing a brake device 41 of an elevator hoist according to Embodiment 2 of the present invention
  • FIG. 9 is a cross-sectional view taken along line IX-IX in FIG.
  • the brake device 41 according to the second embodiment includes a brake drum 42 and a pair of brake units 43 provided outside the brake drum 42. That is, the brake device according to the second embodiment is an external expansion brake.
  • the brake drum 42 has a cylindrical braking surface 42a.
  • the braking surface 42 a is the outer peripheral surface of the brake drum 42.
  • the brake drum 42 is arranged so that the rotation center C thereof is horizontal.
  • Each brake unit 43 has a shaft 44, a position adjusting motor 45, an electromagnetic magnet 46, a braking spring 47, a movable iron core 48, a brake arm 49, and a brake shoe 50. Further, the two brake units 43 have the same configuration and are arranged symmetrically with the brake drum 42 interposed therebetween.
  • the shaft 44 is disposed such that its axis is perpendicular to the rotation center C of the brake drum 42 and is vertical. Further, the shaft 44 rotates around the axis.
  • the position adjustment motor 45 is disposed at the lower end of the shaft 44 and rotates the shaft 44 in response to a command from the control device 5.
  • the electromagnetic magnet 46 has a fixed iron core 51 and a brake coil 52 embedded in a side surface of the fixed iron core 51 on the brake drum 42 side.
  • the movable iron core 48 faces the side surface of the fixed iron core 51.
  • the brake spring 47 is interposed between the movable iron core 48 and the fixed iron core 51.
  • the brake shoe 50 is connected to the movable iron core 48 via the brake arm 49.
  • the braking spring 47 presses the brake shoe 50 against the braking surface 42a.
  • a lining 50a is provided on the surface of the brake shoe 50 that contacts the braking surface 42a.
  • the electromagnetic magnet 46 pulls the brake shoe 50 away from the braking surface 42 a against the braking spring 47.
  • the brake unit 43 is rotatable with respect to the brake drum 42 about the shaft 44 so that the angle at which the brake shoe 50 is pressed against the braking surface 42a by the braking spring 47 changes during braking.
  • the relative distance between the brake unit 43 and the braking surface 42a changes, and the brake torque during emergency braking changes.
  • Each brake shoe 50 is rotatable with respect to the brake arm 49 about a pin 53 parallel to the shaft 44. For this reason, even when the brake unit 43 is tilted, the lining 50a follows the braking surface 42a.
  • FIG. 10 is a sectional view showing a state in which the brake shoe 50 in FIG. 8 is pulled away from the braking surface 42a
  • FIG. 11 is a sectional view showing a state in which the brake unit 43 in FIG. 10 is rotated in the horizontal direction
  • FIG. It is sectional drawing which shows the state which carried out the emergency stop of the cage
  • the brake angle control unit 35 (FIG. 7) outputs a command signal to the position adjustment motor 45 during the traveling of the car 8 according to the information related to the weight loaded in the car and the information related to the traveling direction of the car 8, respectively.
  • the rotation angles of the two brake units 43 are adjusted simultaneously.
  • Other configurations and operations are the same as those in the first embodiment.
  • the brake unit 43 can also be rotated with respect to such an externally-expanded brake device 41, and the brake unit 43 can be rotated according to information about the weight loaded in the car and information about the running direction of the car 8 while the car 8 is running. By adjusting the rotation angle of 43, the same effect as in the first embodiment can be obtained.
  • the present invention can be applied to a hoisting machine whose axial dimension is longer than the dimension perpendicular to the axial direction, and to a thin hoisting machine whose axial dimension is shorter than the dimension perpendicular to the axial direction.
  • the brake drum is arranged so that the center of rotation is horizontal.
  • the brake drum may be arranged so that the center of rotation is vertical or substantially vertical.
  • the angle of the brake units 23 and 43 is controlled by the control device 5 that controls the operation of the car 8.
  • the angle of the brake unit can be controlled by the control device that is separated from the operation control device. It is.
  • the overall layout of the elevator is not limited to FIG. 1, and the present invention is, for example, a 2: 1 roping elevator, a machine room-less elevator, a double deck elevator, and a one-shaft multi-car elevator. Applicable to various types of elevators.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Cage And Drive Apparatuses For Elevators (AREA)

Abstract

L'invention concerne un dispositif de freinage pour un treuil d'ascenseur dans lequel un tambour de frein présente une surface de freinage cylindrique circulaire. Une unité de frein comprend un sabot de frein, un ressort de frein et un électroaimant. L'unité de frein est adaptée pour pouvoir tourner par rapport au tambour de frein de telle sorte que l'angle sous lequel le ressort de frein presse le sabot de frein contre la surface de freinage pendant le freinage varie. En réponse aux informations d'un poids de charge dans une cabine d'ascenseur et aussi en réponse aux informations relatives au sens de déplacement de la cabine d'ascenseur, un dispositif de commande régule l'angle de rotation de l'unité de frein pendant le déplacement de la cabine d'ascenseur.
PCT/JP2016/050243 2016-01-06 2016-01-06 Dispositif de frein pour treuil d'ascenseur WO2017119079A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/JP2016/050243 WO2017119079A1 (fr) 2016-01-06 2016-01-06 Dispositif de frein pour treuil d'ascenseur

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2016/050243 WO2017119079A1 (fr) 2016-01-06 2016-01-06 Dispositif de frein pour treuil d'ascenseur

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WO2017119079A1 true WO2017119079A1 (fr) 2017-07-13

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PCT/JP2016/050243 WO2017119079A1 (fr) 2016-01-06 2016-01-06 Dispositif de frein pour treuil d'ascenseur

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7031776B1 (ja) * 2021-04-09 2022-03-08 三菱電機株式会社 ブレーキ装置及びエレベータ用巻上機

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4988450U (fr) * 1972-11-24 1974-07-31
JPH0977396A (ja) * 1995-09-13 1997-03-25 Toshiba Corp エレベータ用ブレーキ装置
JP2005132506A (ja) * 2003-10-28 2005-05-26 Mitsubishi Electric Corp エレベータ巻上機用ブレーキ装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4988450U (fr) * 1972-11-24 1974-07-31
JPH0977396A (ja) * 1995-09-13 1997-03-25 Toshiba Corp エレベータ用ブレーキ装置
JP2005132506A (ja) * 2003-10-28 2005-05-26 Mitsubishi Electric Corp エレベータ巻上機用ブレーキ装置

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7031776B1 (ja) * 2021-04-09 2022-03-08 三菱電機株式会社 ブレーキ装置及びエレベータ用巻上機

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