WO2023047561A1 - エレベータ装置 - Google Patents

エレベータ装置 Download PDF

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Publication number
WO2023047561A1
WO2023047561A1 PCT/JP2021/035262 JP2021035262W WO2023047561A1 WO 2023047561 A1 WO2023047561 A1 WO 2023047561A1 JP 2021035262 W JP2021035262 W JP 2021035262W WO 2023047561 A1 WO2023047561 A1 WO 2023047561A1
Authority
WO
WIPO (PCT)
Prior art keywords
electromagnet
car
electric actuator
elevator
safety device
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.)
Ceased
Application number
PCT/JP2021/035262
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
洋輔 久保
秀隆 座間
康司 伊藤
智久 早川
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to EP21957724.4A priority Critical patent/EP4410727A4/en
Priority to JP2023549280A priority patent/JP7522325B2/ja
Priority to CN202180102279.2A priority patent/CN117940361A/zh
Priority to PCT/JP2021/035262 priority patent/WO2023047561A1/ja
Publication of WO2023047561A1 publication Critical patent/WO2023047561A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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
    • 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
    • B66B5/22—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 means of linearly-movable wedges

Definitions

  • the present invention relates to an elevator apparatus equipped with an electrically operated safety device.
  • the elevator system is equipped with a governor and an emergency stop device to constantly monitor the ascending and descending speed of the car and to emergency stop the car that has fallen into a predetermined overspeed condition.
  • the car and the governor are connected by a governor rope, and when an overspeed condition is detected, the governor restrains the governor rope and activates the emergency stop device on the car side to bring the car to an emergency stop.
  • Patent Document 1 The technology described in Patent Document 1 is known as a conventional technology related to a safety device that does not use a governor rope.
  • a drive shaft that drives the safety device and an operating mechanism that operates the drive shaft are provided on the car.
  • the operating mechanism includes a movable iron core mechanically connected to the drive shaft via a connecting piece, and an electromagnet that attracts the movable iron core.
  • the drive shaft is biased by a drive spring, but normally the movement of the drive shaft is restrained by the operating mechanism because the electromagnet is energized and the movable iron core is attracted.
  • the electromagnet is demagnetized and the restraint on the drive shaft is released, and the drive shaft is driven by the biasing force of the drive spring.
  • the lifting rod of the safety device is pulled up, so that the safety device operates to bring the car to an emergency stop.
  • the electromagnet when returning the safety device to its normal state, move the electromagnet closer to the movable iron core that was moved in the event of an emergency.
  • the electromagnet contacts the movable core, the electromagnet is energized and the movable core is attracted to the electromagnet. Further, the electromagnet is driven while the movable iron core is attracted to the electromagnet, and the movable iron core and the electromagnet are returned to the normal standby position.
  • the movement mechanism of the electromagnet has a feed screw shaft with which the electromagnet is screwed, and a motor for rotating the feed screw shaft.
  • the drive mechanism including the drive shaft and the operating mechanism occupy a large space. This limits the freedom of installation of the drive and actuation mechanisms in the car.
  • the present invention provides an elevator apparatus equipped with an electric emergency stop device that can reduce the occupied space and is suitable for space saving.
  • an elevator apparatus includes a car, a safety device provided in the car, a drive mechanism provided in the car for operating the safety device, and a drive mechanism for operating the safety device.
  • an electric actuator wherein the drive mechanism has a drive rod connected to the safety device and operating the safety device, the drive rod having a torsion spring portion, and the electric actuator When operated, the driving rod rotates due to the biasing force of the torsion spring portion, and the rotation of the driving rod causes the safety device to operate.
  • the space occupied by the drive mechanism of the safety device can be reduced.
  • FIG. 1 is a schematic configuration diagram of an elevator apparatus that is an embodiment
  • FIG. FIG. 2 is a view in the direction of arrow A in FIG. 1, showing the configuration of the safety device in the example.
  • FIG. 2 is a configuration diagram showing the mechanical structure of the electric actuator 10 (FIG. 1) when the safety device 2 is in a non-operating state
  • FIG. 4 is a plan view showing the mechanical structure of the electric actuator shown in FIG. 3
  • Fig. 2 is a configuration diagram showing the mechanical structure of the electric actuator 10 (Fig. 1) when the safety device 2 is in an operating state
  • FIG. 6 is a plan view showing the mechanical structure of the electric actuator shown in FIG. 5;
  • FIG. 1 is a schematic configuration diagram of an elevator system that is one embodiment of the present invention.
  • the elevator system includes a car 1, a safety device 2, a drive mechanism (12 to 17) for operating the safety device 2, and an electric actuator 10 for operating the drive mechanism. I have.
  • the car 1 is suspended in a hoistway provided in the building by a main rope 3 that is wound around a car under pulley 5 that is provided at the bottom of the car 1 . Further, the car 1 is slidably engaged with the guide rails 4 via a guide device (not shown). When the main rope 3 is friction-driven by a driving device (hoisting machine, not shown), the car 1 ascends and descends in the hoistway.
  • the elevator apparatus of this embodiment is a so-called machine room-less elevator in which a drive device (hoisting machine: not shown) and an elevator control device (not shown) are installed in the hoistway.
  • a speed detection device (not shown) is provided in the car 1 and constantly detects the ascending/descending speed of the car 1 in the hoistway. Therefore, the speed detector can detect that the elevator car 1 has exceeded a predetermined overspeed.
  • the speed detection device is provided with an image sensor, and detects the speed of the car 1 based on the image information of the surface condition of the guide rail 4 acquired by the image sensor. For example, the speed detection device calculates the speed from the moving distance of the image feature amount in a predetermined time.
  • the speed detection device may calculate the speed of the car based on the output signal of a rotary encoder that rotates as the car moves.
  • the electric actuator 10 is an electromagnetic actuator in this embodiment and is arranged at the bottom of the car 1 .
  • the drive mechanism (12-17) is also arranged below the car 1. As shown in FIG.
  • the drive rod 12 that drives the safety device 2 rotates around the central axis in the longitudinal direction due to the biasing force of the spring portion 13 .
  • a brake (described later) of the safety device 2 is pushed up. As a result, the safety device 2 operates.
  • the drive rod 12 is arranged below the car 1.
  • the drive rod 12 is rotatably supported below the car 1 by a first support portion 16 and a second support portion 17 .
  • the spring portion 13 is made of a torsion coil spring.
  • the drive rod 12 is inserted through the spring portion 13 .
  • One end of the spring portion 13 ie, the torsion coil spring, is fixed to a locking portion 14 on the surface of the drive rod 12 .
  • the spring portion 13 that is, the other end of the torsion coil spring is fixed to a fixing portion 15 positioned below the car 1 .
  • the spring portion 13 receives a torsional moment and stores bending elastic energy around the central axis of the spring portion 13 .
  • the drive rod 12 is inserted through the spring portion 13 , so the central axis of the spring portion 13 substantially coincides with the rotational central axis of the drive rod 12 . Therefore, when the bending elastic energy of the spring portion 13 is released, the drive rod 12 rotates due to the biasing force of the spring portion 13 as described above.
  • the safety devices 2 are arranged one by one on the left and right sides of the car 1.
  • a pair of brake elements included in each safety device 2 is movable between a braking position and a non-braking position, and sandwiches the guide rail 4 at the braking position. Furthermore, when the safety device 2 rises relative to the car 1 due to the descent of the car 1, the frictional force acting between the brake shoe and the guide rail 4 produces a braking force. As a result, the safety device 2 is actuated when the car 1 is in an overspeed condition to bring the car 1 to an emergency stop.
  • the elevator system of this embodiment has a so-called ropeless governor system that does not use a governor rope. ), the power supply to the drive (hoist) and to the control device controlling this drive is cut off. Further, when the descending speed of the car 1 reaches a second overspeed (for example, a speed not exceeding 1.4 times the rated speed), the electric actuator 10 provided in the car 1 operates the safety device 2. Then, the car 1 is brought to an emergency stop.
  • a second overspeed for example, a speed not exceeding 1.4 times the rated speed
  • the ropeless governor system is composed of the aforementioned speed detection device and a safety control device that determines the overspeed state of the car 1 based on the output signal of the speed detection device.
  • This safety control device measures the speed of the car 1 based on the output signal of the speed detection device, and when it is determined that the measured speed has reached the first overspeed, the power supply of the drive device (hoisting machine) and It outputs a command signal for shutting off the power supply of the control device that controls this drive device. Further, when the safety control device determines that the measured speed has reached the second overspeed, it outputs a command signal for operating the electric actuator 10 .
  • FIG. 2 is a view from the arrow A in FIG. 1, showing the configuration of the safety device 2 in this embodiment.
  • a pair of brakes 201 are placed on a pedestal 202 .
  • the push-up rod 203 fixed to the pedestal 202 is driven upward in the figure, the pedestal 202 pushes up the brake shoe 201 to the braking position.
  • the rotational force of the drive rod 12 is converted into driving force for moving the push-up rod 203 upward by the first link portion 101, the second link portion 102, and the third link portion that are rotatably connected to each other. be done.
  • the end of the drive rod 12 is connected to the central portion of the first link portion 101 in the longitudinal direction.
  • One end portion in the longitudinal direction of the first link portion 101 and one end portion in the longitudinal direction of the second link portion 102 are rotatably connected to each other at the connection portion 110 .
  • the other longitudinal end of the second link portion 102 and one longitudinal end of the third link portion 103 are rotatably connected to each other at a connecting portion 111 .
  • a central portion in the longitudinal direction of the third link portion 103 is rotatably supported by a fixed shaft 115 .
  • the ends of drive rods 12 are connected.
  • the other end in the longitudinal direction of the third link portion 103 and the one end in the longitudinal direction of the push-up rod 203 are rotatably connected to each other at the connecting portion 112 .
  • FIG. 3 is a configuration diagram showing the mechanical structure of the electric actuator 10 (FIG. 1) when the safety device 2 is in a non-operating state.
  • 4 is a plan view showing the mechanical structure of the electric actuator shown in FIG. 3.
  • the electric operating section includes an operation lever 11 connected to the drive rod 12, a movable member 34 rotatably engaged with the operation lever 11, and an electromagnetic force that attracts the movable member 34. It has an electromagnet part 35 that The electromagnet portion 35 has two electromagnet core portions 35A whose magnetic pole surfaces face the movable member 34, and an electromagnet support plate 35B to which the two electromagnet core portions 35A are fixed. At least the portion of the movable member 34 that is attracted to the electromagnet portion 35 is made of a magnetic material.
  • the electric actuator includes a feed screw 36 (for example, a trapezoidal screw) rotatably supported by a first support member 41 and a second support member 42 fixed to a base portion 50 provided at the bottom of the car 1. , and a motor 37 that drives a feed screw 36 to rotate.
  • the feed screw 36 is screwed with a feed nut 35C provided in the electromagnet portion 35 .
  • the motor 37 rotates the feed screw 36, the rotating feed screw 36 and the feed nut 35C provided in the electromagnet 35 cause the rotation of the motor 37 to linearly move the electromagnet 35 along the axial direction of the feed screw 36. is converted to
  • the base part 50 is formed by bending a plate-like member, and has a fixed part fixed to the car 1 and a convex part projecting downward from the car 1 .
  • the feed screw 36 , the movable member 34 , the electromagnet portion 35 and the motor 37 are positioned below the convex portion of the base portion 50 .
  • the drive rod 12 is positioned in the space between the lower portion of the car 1 and the convex portion of the base portion 50 .
  • One longitudinal end of the operating lever 11 is connected to the drive rod 12 .
  • the operating lever 11 passes through an opening 50C in the convex portion of the base portion 50. As shown in FIG.
  • the other end of the operating lever 11 in the longitudinal direction is connected to the movable member 34 .
  • the movable member 34 in the standby state, is attracted to the electromagnet section 35 which is excited.
  • the electromagnet part 35 is located at a predetermined position in the standby state.
  • the biasing force of the spring portion 13 acts on the drive rod 12 so as to rotate it in the direction of the arrow shown in FIG.
  • the movable member 34 since the movable member 34 is attracted to the electromagnet portion 35 , the movement of the movable member 34 and the operating lever 11 and the rotation of the drive rod 12 are restrained against the biasing force of the spring portion 13 . .
  • FIG. 5 is a configuration diagram showing the mechanical structure of the electric actuator 10 (FIG. 1) when the safety device 2 is in an operating state.
  • 6 is a plan view showing the mechanical structure of the electric actuator shown in FIG. 5.
  • the motor 37 is driven to rotate the feed screw 36 .
  • Rotation of the motor 37 is converted into linear movement of the electromagnet portion 35 along the axial direction of the feed screw 36 by the rotating feed screw 36 and the feed nut 35C provided in the electromagnet portion 35 .
  • the electromagnet part 35 approaches the movable member 34 positioned at the operating position as shown in FIGS.
  • the operating lever 11 causes the driving rod 12 to move in the direction opposite to the direction of the arrow shown in FIG. direction. Therefore, the spring portion 13 (FIG. 1), which is a torsion coil spring, receives a torsional moment and stores bending elastic energy around the central axis of the spring portion 13 . Therefore, the spring portion 13 releases elastic energy when the electric actuator 10 is actuated, and then stores elastic energy when the electric actuator returns to the standby state.
  • the space occupied by the drive mechanism of the safety device 2 and the electric actuator 10 can be reduced. Therefore, the drive mechanism and the electric actuator 10 can be installed in a narrow space like the lower part of the car 1.
  • both the longitudinal direction of the drive rod 12 in the drive mechanism and the longitudinal direction of the feed screw 36, that is, the longitudinal direction of the electric actuator are parallel to the lower surface of the car 1 (for example, the car floor surface). are arranged so that As a result, the space occupied by the drive mechanism of the safety device 2 and the electric actuator 10 can be reliably reduced.
  • a torsion bar spring (torsion bar) may be used instead of the torsion coil spring.
  • at least part of the drive rod 12 is constituted by a torsion bar spring.
  • the present invention is not limited to the above-described embodiments, and includes various modifications.
  • the above-described embodiments have been described in detail in order to explain the present invention in an easy-to-understand manner, and are not necessarily limited to those having all the described configurations.
  • the electric actuator 10 may be provided above the car.
  • the elevator device may have a machine room.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Maintenance And Inspection Apparatuses For Elevators (AREA)
PCT/JP2021/035262 2021-09-27 2021-09-27 エレベータ装置 Ceased WO2023047561A1 (ja)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP21957724.4A EP4410727A4 (en) 2021-09-27 2021-09-27 ELEVATOR DEVICE
JP2023549280A JP7522325B2 (ja) 2021-09-27 2021-09-27 エレベータ装置
CN202180102279.2A CN117940361A (zh) 2021-09-27 2021-09-27 电梯装置
PCT/JP2021/035262 WO2023047561A1 (ja) 2021-09-27 2021-09-27 エレベータ装置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2021/035262 WO2023047561A1 (ja) 2021-09-27 2021-09-27 エレベータ装置

Publications (1)

Publication Number Publication Date
WO2023047561A1 true WO2023047561A1 (ja) 2023-03-30

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ID=85719389

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Application Number Title Priority Date Filing Date
PCT/JP2021/035262 Ceased WO2023047561A1 (ja) 2021-09-27 2021-09-27 エレベータ装置

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EP (1) EP4410727A4 (https=)
JP (1) JP7522325B2 (https=)
CN (1) CN117940361A (https=)
WO (1) WO2023047561A1 (https=)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2025191701A1 (ja) * 2024-03-12 2025-09-18 株式会社日立製作所 エレベータ装置
WO2025191633A1 (ja) * 2024-03-11 2025-09-18 株式会社日立製作所 エレベータ装置、並びにエレベータ装置の保守方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004142914A (ja) * 2002-10-25 2004-05-20 Mitsubishi Electric Corp エレベーターの非常止め装置
JP2012520811A (ja) * 2009-03-16 2012-09-10 オーチス エレベータ カンパニー 過加速度および過速度検出・処理システム
US20140326544A1 (en) * 2011-12-21 2014-11-06 Inventio Ag Actuator for an elevator brake
WO2019220505A1 (ja) * 2018-05-14 2019-11-21 三菱電機株式会社 エレベーターの安全装置、及びエレベーターの安全システム
JP2021130550A (ja) * 2020-02-20 2021-09-09 株式会社日立製作所 非常止め装置及びエレベーター

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7178590B2 (ja) * 2019-07-31 2022-11-28 パナソニックＩｐマネジメント株式会社 エレベータ装置
CN113184656B (zh) * 2021-05-24 2022-10-25 日立电梯（中国）有限公司 一种电梯安全钳一体式提拉机构

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004142914A (ja) * 2002-10-25 2004-05-20 Mitsubishi Electric Corp エレベーターの非常止め装置
JP2012520811A (ja) * 2009-03-16 2012-09-10 オーチス エレベータ カンパニー 過加速度および過速度検出・処理システム
US20140326544A1 (en) * 2011-12-21 2014-11-06 Inventio Ag Actuator for an elevator brake
WO2019220505A1 (ja) * 2018-05-14 2019-11-21 三菱電機株式会社 エレベーターの安全装置、及びエレベーターの安全システム
JP2021130550A (ja) * 2020-02-20 2021-09-09 株式会社日立製作所 非常止め装置及びエレベーター

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP4410727A4 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2025191633A1 (ja) * 2024-03-11 2025-09-18 株式会社日立製作所 エレベータ装置、並びにエレベータ装置の保守方法
WO2025191701A1 (ja) * 2024-03-12 2025-09-18 株式会社日立製作所 エレベータ装置

Also Published As

Publication number Publication date
EP4410727A4 (en) 2025-09-03
EP4410727A1 (en) 2024-08-07
CN117940361A (zh) 2024-04-26
JP7522325B2 (ja) 2024-07-24
JPWO2023047561A1 (https=) 2023-03-30

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