WO2023026423A1 - Dispositif d'ascenseur - Google Patents

Dispositif d'ascenseur Download PDF

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Publication number
WO2023026423A1
WO2023026423A1 PCT/JP2021/031300 JP2021031300W WO2023026423A1 WO 2023026423 A1 WO2023026423 A1 WO 2023026423A1 JP 2021031300 W JP2021031300 W JP 2021031300W WO 2023026423 A1 WO2023026423 A1 WO 2023026423A1
Authority
WO
WIPO (PCT)
Prior art keywords
car
electric actuator
brake shoe
electromagnet
rod
Prior art date
Application number
PCT/JP2021/031300
Other languages
English (en)
Japanese (ja)
Inventor
聡志 沼田
Original Assignee
株式会社日立製作所
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 株式会社日立製作所 filed Critical 株式会社日立製作所
Priority to CN202180101528.6A priority Critical patent/CN117794838A/zh
Priority to PCT/JP2021/031300 priority patent/WO2023026423A1/fr
Priority to JP2023543572A priority patent/JP7562006B2/ja
Priority to EP21954424.4A priority patent/EP4393861A1/fr
Publication of WO2023026423A1 publication Critical patent/WO2023026423A1/fr

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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
    • 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
    • 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
    • B66B5/027—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions to permit passengers to leave an elevator car in case of failure, e.g. moving the car to a reference floor or unlocking the door
    • 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
    • B66B5/04—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions for detecting excessive speed
    • B66B5/06—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions for detecting excessive speed electrical
    • 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

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 present invention provides an elevator apparatus equipped with an electric emergency stop device that can improve the degree of freedom in installation and is suitable for space saving.
  • an elevator system includes a car, a safety device provided in the car, and an electric actuator provided in the car for operating the safety device.
  • the electric actuator includes a movable member, an electromagnet for attracting the movable member in a standby state of the electric actuator, a rod connected to the movable member, and a brake actuating member connected to an end of the rod.
  • the space occupied by the actuating mechanism of the safety device can be reduced, and the degree of freedom in the installation position of the actuating mechanism is improved.
  • FIG. 1 is a schematic configuration diagram of an elevator apparatus that is an embodiment;
  • FIG. It is a front view which shows the mechanism part of the electric actuator in an Example. It is a front view which shows the mechanism part of the electric actuator in an Example.
  • FIG. 3 is a side view showing the mechanical portion of the electric actuator in the example; It is a side view which shows the mechanism part of the electric actuator in a modification.
  • 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, an electric actuator 10, a drive mechanism (12, 100, etc.), and a safety device 2.
  • a car 1 is suspended by a main rope (not shown) in a hoistway provided in a building, and is slidably engaged with a guide rail 4 via a guide device (not shown).
  • a driving device hoisting machine: not shown
  • the car 1 ascends and descends 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 .
  • a drive mechanism (12, 100, etc.) is also arranged in the lower part of the car 1. As shown in FIG.
  • the brake shoe activating member 100 pushes up the brake shoe 200 of the safety device 2 . That is, the brake shoe 200 is activated by the brake shoe activation member 100 . As a result, the safety device 2 operates.
  • the safety devices 2 are arranged one by one on the left and right sides of the car 1.
  • a pair of brake elements 200 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. Further, 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 200 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 .
  • the pair of brakes provided in the safety device 2 are activated by the brakes activating member 100, the pair of brakes sandwich the guide rail 4.
  • FIG. 2 is a front view in the installation state of FIG. 1, showing the electric actuator 10 and the mechanical portion of the drive mechanism in this embodiment.
  • the safety device is in a non-braking state
  • the electric actuator 10 is in a non-operating state (standby state). That is, the elevator installation is in its normal state.
  • the electric actuator 10 is in a standby state when the elevator system is in normal operation.
  • the movable member 34 is attracted to the energized electromagnet 35 .
  • the movement of the connection bracket 38 that connects the movable member 34 and the pressing member 15 (spring seat) is restrained against the biasing force of the drive spring 13 (compression spring).
  • At least the portion of the movable member 34 that is attracted to the electromagnet 35 is made of a magnetic material.
  • the rod 21 penetrates through the pressing member 15 .
  • the pressing member 15 is fixed to the rod 21 .
  • the fixed member 14 is fixed to a structural member (not shown) of the car 1 positioned below the car, such as a car lower frame.
  • the rod 21 slidably penetrates the fixed member 14 .
  • the rod 21 is passed through the drive spring 13 .
  • the drive spring 13 is positioned between the fixed member 14 and the pressing member 15 . One end and the other end of the drive spring 13 abut against the fixing member 14 and the pressing member 15, respectively.
  • the drive spring 13 is pressed by the fixing member 14 and the pressing member 15 . Therefore, the drive spring 13 is compressed and stores elastic energy. In other words, the drive spring 13 stores biasing force.
  • a rod 21 is connected to each of the pair of left and right brake shoe activation members 100 .
  • Each rod 21 can be operated in conjunction with a link mechanism consisting of a link 12 and a link holding pin 30 .
  • the brake shoe activating member 100 has a tapered portion, and the tapered surface is in contact with the bottom of the brake shoe 200 .
  • the brake shoe activation member 100 is made of a bar-shaped metal member.
  • a bar-shaped metal member As the metal member, a bulk member, a bent plate member, or the like can be applied. It should be noted that members of various shapes and materials can be applied without being limited to bar-shaped metal members as long as they have sufficient strength to support and push up the brake shoe 200 .
  • FIG. 3 is a front view in the installation state of FIG. 1, showing the electric actuator 10 and the mechanical portion of the drive mechanism in this embodiment.
  • the safety device is in a braking state, and the electric actuator 10 is in an operating state. That is, the elevator installation is in a stopped state.
  • the electric actuator 10 In order to return the electric actuator 10 to the standby state, the electric actuator 10 is operated as described below.
  • the electric actuator 10 has a feed screw 36 (for example, a trapezoidal screw) located on the planar portion of the base portion for driving the movable member 34 .
  • the feed screw 36 is rotatably supported by a first support member 41 and a second support member 42 fixed on the plane of the substrate portion.
  • the electromagnet 35 has a nut portion that is screwed onto the feed screw 36 .
  • the feed screw 36 is rotationally driven by a motor 37 .
  • a plate-shaped member such as a metal plate may be used as the substrate portion, or a flat portion of steel material that constitutes the cage lower frame may be used.
  • the motor 37 is driven to rotate the feed screw 36 .
  • Rotation of the motor 37 is converted into linear movement of the electromagnet 35 along the axial direction of the feed screw 36 by the rotating feed screw 36 and the nut portion of the electromagnet 35 .
  • the electromagnet 35 approaches the movable member 34 and comes into contact with the movable member 34 .
  • the electromagnet 35 is excited and the motor 37 is stopped.
  • the movable member 34 is attracted to the electromagnet 35 by electromagnetic force.
  • FIG. 4 is a side view showing the mechanical portion of the electric actuator 10 in this embodiment in the installation state of FIG. That is, FIG. 4 is a perspective view of A in FIG.
  • the rod 21 extends directly below the pair of brake pads 200 . Therefore, the brake shoe actuating member 100 connected to the end of the rod 21 is in direct contact with the brake shoe 200 .
  • the safety device in this embodiment does not have a lifting rod whose longitudinal direction extends in the height direction of the car, unlike safety devices according to known technologies.
  • Other configurations are the same as those of known safety devices.
  • the brake 200 and an elastic body such as a leaf spring that presses the brake 200 are housed in a housing 201 (or a frame).
  • FIG. 5 is a side view, similar to FIG. 4, showing the mechanical portion of the electric actuator 10 in the elevator system as a modified example.
  • a lever 203 is connected to the lower part of the pair of brake pads 200 .
  • the lever 203 extends laterally of the pair of brake pads 200 , that is, from the lower part of the brake pads 200 in a direction perpendicular to the longitudinal direction of the rod 21 .
  • the end or free end of the extension of lever 203 contacts the tapered surface of brake shoe actuating member 100 .
  • the lever 203 is pushed up by the brake shoe activating member 100, thereby pushing the brake shoe 200 up.
  • the brake 200 is pushed up by the brake actuating member 100, so that the space occupied by the operating mechanism of the safety device (the electric actuator 10 and the drive mechanism (12, 200, etc.)) can be reduced. At the same time, the degree of freedom of the installation position of the operating mechanism is improved.
  • 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 may be installed above the car.
  • the elevator apparatus may have a machine room or may be a so-called machine room-less elevator.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Maintenance And Inspection Apparatuses For Elevators (AREA)

Abstract

L'invention concerne un dispositif d'ascenseur équipé d'un dispositif de frein de sécurité électromoteur qui offre un degré élevé de liberté d'installation et est apte à économiser de l'espace. Ce dispositif d'ascenseur comporte une cabine (1), un dispositif de frein de sécurité (2) disposé sur la cabine (1), et un actionneur électrique (10) qui est disposé sur la cabine et actionne le dispositif de frein de sécurité. L'actionneur électrique comporte un élément mobile, un électroaimant qui attire l'élément mobile dans un état de veille de l'actionneur électrique, une tige qui est reliée à l'élément mobile, et un élément d'activation d'élément de freinage (100) qui est relié à une extrémité de la tige. Lorsque l'excitation de l'électroaimant est arrêtée et que la tige est entraînée, un élément de freinage (200) du dispositif de frein de sécurité est poussé par l'élément d'activation d'élément de freinage.
PCT/JP2021/031300 2021-08-26 2021-08-26 Dispositif d'ascenseur WO2023026423A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
CN202180101528.6A CN117794838A (zh) 2021-08-26 2021-08-26 电梯装置
PCT/JP2021/031300 WO2023026423A1 (fr) 2021-08-26 2021-08-26 Dispositif d'ascenseur
JP2023543572A JP7562006B2 (ja) 2021-08-26 2021-08-26 エレベータ装置
EP21954424.4A EP4393861A1 (fr) 2021-08-26 2021-08-26 Dispositif d'ascenseur

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2021/031300 WO2023026423A1 (fr) 2021-08-26 2021-08-26 Dispositif d'ascenseur

Publications (1)

Publication Number Publication Date
WO2023026423A1 true WO2023026423A1 (fr) 2023-03-02

Family

ID=85322548

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2021/031300 WO2023026423A1 (fr) 2021-08-26 2021-08-26 Dispositif d'ascenseur

Country Status (4)

Country Link
EP (1) EP4393861A1 (fr)
JP (1) JP7562006B2 (fr)
CN (1) CN117794838A (fr)
WO (1) WO2023026423A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005115904A1 (fr) * 2004-05-25 2005-12-08 Mitsubishi Denki Kabushiki Kaisha Dispositif d'arrêt d'urgence d'élévateur
JP2014065589A (ja) * 2012-09-26 2014-04-17 Toshiba Corp エレベータ
WO2020110437A1 (fr) * 2018-11-28 2020-06-04 株式会社日立製作所 Dispositif d'arrêt d'urgence et ascenseur
US20200207576A1 (en) * 2018-12-31 2020-07-02 Kone Corporation Elevator car parking brake

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE60335421D1 (de) 2003-10-07 2011-01-27 Otis Elevator Co Fernrückstellbare seillose not-stopp-vorrichtung für einen aufzug

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005115904A1 (fr) * 2004-05-25 2005-12-08 Mitsubishi Denki Kabushiki Kaisha Dispositif d'arrêt d'urgence d'élévateur
JP2014065589A (ja) * 2012-09-26 2014-04-17 Toshiba Corp エレベータ
WO2020110437A1 (fr) * 2018-11-28 2020-06-04 株式会社日立製作所 Dispositif d'arrêt d'urgence et ascenseur
US20200207576A1 (en) * 2018-12-31 2020-07-02 Kone Corporation Elevator car parking brake

Also Published As

Publication number Publication date
EP4393861A1 (fr) 2024-07-03
JPWO2023026423A1 (fr) 2023-03-02
CN117794838A (zh) 2024-03-29
JP7562006B2 (ja) 2024-10-04

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