CN110155843B - Elevator pit overhauls special device of saving oneself - Google Patents
Elevator pit overhauls special device of saving oneself Download PDFInfo
- Publication number
- CN110155843B CN110155843B CN201910543134.0A CN201910543134A CN110155843B CN 110155843 B CN110155843 B CN 110155843B CN 201910543134 A CN201910543134 A CN 201910543134A CN 110155843 B CN110155843 B CN 110155843B
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- China
- Prior art keywords
- landing door
- unlocking
- door lock
- pusher dog
- lock
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- 238000005452 bending Methods 0.000 claims abstract description 41
- 238000012423 maintenance Methods 0.000 claims description 33
- 238000007689 inspection Methods 0.000 claims description 5
- 238000010586 diagram Methods 0.000 description 6
- 230000003449 preventive effect Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009194 climbing Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
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
- B66B5/0087—Devices facilitating maintenance, repair or inspection tasks
Abstract
The invention provides a self-rescue device special for elevator pit overhaul, which comprises a landing door unlocking device and an unlocking and holding device, wherein the landing door unlocking device comprises a pusher dog and a long crank, and the middle part of the pusher dog is arranged on a triangular key lock and rotates synchronously with the triangular key lock; the long crank comprises a vertical part and a bending part, a first end of the vertical part is positioned at the lower part of the landing door and is vertically connected with the bending part, a second end of the vertical part is hinged with a first end of the pusher dog, and the up-and-down movement of the vertical part drives the pusher dog to rotate by taking the triangular key lock as the circle center; the second end of the pusher dog is positioned below the layer door lock latch hook and is used for jacking the layer door lock latch hook upwards; the unlocking retainer is capable of providing a downward force to the bend when the bend is moved downward and inserted into the unlocking retainer. The elevator door lock can assist an maintainer to open the elevator door lock in the pit, and keep the elevator door lock in an open state until the maintainer climbs out of the pit to leave the hoistway, and the maintainer can reset the elevator door lock outside the elevator door to restore normal operation.
Description
Technical Field
The invention belongs to the technical field of elevator equipment, and particularly relates to a self-rescue device special for elevator pit overhaul.
Background
The elevator can normally and safely run, besides manufacturing and installation, the other main factor is daily maintenance and maintenance during running, the maintenance and preventive maintenance of elevator equipment are enhanced, the faults and the elevator stopping time are reduced, the elevator is always in a good technical state, and the elevator is a frequent and very important work. The preventive maintenance of the elevator is to constantly monitor and check the elevator in use, and once the fault sign is found, the elevator is repaired and maintained, so that the elevator may not be ill or have few ill problems. Preventive maintenance, i.e. spot inspection maintenance, is performed on critical parts and easily failed parts of the elevator.
When the maintenance operation of the elevator pit is carried out, two maintenance personnel are generally required to cooperate. In extreme cases, when only one maintainer performs pit maintenance, the maintainer needs to be able to unlock the landing door lock from the pit of the elevator shaft and keep the unlocking state of the landing door lock until the landing door lock climbs out of the pit. However, some pit arrangements of the hoistway are such that the ladder of the pit cannot support the serviceman to open the landing door lock, and then the serviceman cannot open the landing door and climb out of the hoistway. And in the maintenance process, because the elevator can possibly move up and down, the landing door lock cannot be opened all the time, and the landing door lock can be opened only when a maintenance personnel is ready to leave the well, so that the maintenance personnel in the pit can open the landing door lock from the inside of the pit of the elevator well and keep the unlocking state of the landing door lock until the landing door lock climbs out from the pit. Meanwhile, after leaving the hoistway, an maintainer needs to reset the landing door lock to restore normal operation of the elevator, and the restoration needs to be completed outside the landing door by the maintainer. Therefore, the development of a device for assisting in solving the above problems by an maintainer during pit maintenance is significant for pit maintenance operation.
Disclosure of Invention
The invention aims to provide a self-rescue device special for elevator pit maintenance, which can assist an maintainer to open a landing door lock in a pit when the maintainer finishes pit maintenance and leaves a hoistway, and can reset the landing door lock outside the landing door after the maintainer climbs out of the pit and leaves the hoistway after the landing door lock is kept in an open state, so that normal operation of an elevator is restored.
The invention is realized by the following technical scheme:
the elevator pit overhauling special self-rescue device comprises a landing door unlocking device and an unlocking retaining device, wherein the landing door unlocking device and the unlocking retaining device are both positioned at one side of a landing door close to a hoistway, the landing door unlocking device is positioned below a landing door lock hook and is arranged on a triangular key lock, and the unlocking retaining device is positioned below the landing door unlocking device and is movably arranged at the lower part of the landing door;
the landing door unlocking device comprises a pusher dog and a long crank, wherein the middle part of the pusher dog is movably arranged on the triangular key lock and rotates synchronously with the triangular key lock;
the long crank comprises a vertical part and a bending part, a first end of the vertical part is positioned at the lower part of the landing door and is vertically connected with the bending part, a second end of the vertical part is hinged with a first end of the pusher dog, and the up-and-down movement of the vertical part drives the pusher dog to rotate by taking the triangular key lock as the circle center;
the second end of the pusher dog is positioned below the landing door lock hook and is used for jacking the landing door lock hook upwards so that the landing door lock is in an unlocking state;
when the bending part moves downwards and is inserted into the unlocking maintaining device, the unlocking maintaining device can provide downward force for the bending part so that the layer door lock maintains the unlocking state.
According to the elevator pit maintenance special self-rescue device, the long crank is pulled to move downwards to drive the pusher dog to rotate upwards by taking the triangular key lock as the center of a circle, so that the lock hook of the layer door lock is jacked, unlocking of the layer door lock is realized, the long crank is pulled to move downwards, meanwhile, the bending part of the long crank is inserted into the unlocking retaining device, the unlocking retaining device exerts downward force on the bending part, the long crank can drive the pusher dog to jack the lock hook of the layer door lock all the time, so that the lock hook of the layer door lock is kept in an unlocking state all the time, an maintainer can leave a hoistway through a climbing ladder and enter a hall, then the maintainer is inserted into the triangular key lock outside the layer door and rotates in the opposite direction of unlocking the layer door lock by the triangular key lock, the pusher dog rotates synchronously along with the triangular key lock, the bending part of the long crank is driven to move upwards, and the bending part of the long crank is separated from the unlocking retaining device, so that the layer door lock is restored to a locking state.
Compared with the prior art, the special self-rescue device for elevator pit maintenance moves the unlocking position from the top end of the landing door to the lower part of the landing door, so that an maintainer can open the landing door lock in the pit by himself without the cooperation of other maintainers, and the landing door lock is kept in an unlocking state by the unlocking and retaining device until the maintainer climbs out of a hoistway, and also without the cooperation of other maintainers, the maintainer can reset the landing door lock outside the landing door, so that the normal operation of the elevator is recovered.
Further, the unlocking and retaining device comprises a retaining wheel and an elastic device, wherein the retaining wheel is arranged on the landing door and can rotate along the circle center, and a groove-shaped notch matched with the bending part is arranged on the outer circumference of the retaining wheel;
the elastic device is arranged between the holding wheel and the landing door;
when the bending part moves downwards and is inserted into the groove notch, the elastic device can provide anticlockwise circumferential force for the holding wheel so that the holding wheel provides downward force for the bending part.
Further, the elastic device comprises a torsion spring and a limit screw, the limit screw is arranged on the landing door, one end of the torsion spring is fixed on the retaining wheel, and the other end of the torsion spring is propped against the limit screw.
Further, the elastic device comprises an arc spring and a limit screw, the limit screw is arranged on the landing door, one end of the arc spring is fixed on the holding wheel, the other end of the arc spring is fixed on the limit screw, and the arc center position of the arc spring is the same as the circle center position of the holding wheel.
Further, the device also comprises a balancing weight which is arranged at the second end of the pusher dog. The weight of the long crank can be balanced through the weight of the balancing weight, so that when the landing door lock is in a locking state, the condition that the first end of the pusher dog rotates downwards due to the weight pulling force of the long crank, and the second end of the pusher dog rotates upwards to touch the landing door lock hook is avoided.
Drawings
FIG. 1 is a schematic diagram of a special self-rescue device for elevator pit maintenance;
FIG. 2 is a schematic diagram of the structure of a door lock of a closing layer of the self-rescue device special for elevator pit maintenance;
FIG. 3 is a schematic diagram of the structure of the unlocking layer door lock of the special self-rescue device for elevator pit maintenance;
fig. 4 is a side view of the elevator pit inspection-specific self-rescue device of the present invention mounted on a landing door.
In the figure, the door unlocking device comprises a 1-layer door unlocking device, a 11-pusher dog, a 12-long crank, a 121-vertical part, a 122-bending part, a 2-unlocking retaining device, a 21-retaining wheel, a 211-groove notch, a 22-elastic device, a 221-torsion spring, a 222-limit screw, a 3-triangular key lock, a 4-layer door lock hook, a 5-layer door lock seat, a 6-balancing weight and a 7-layer door.
Detailed Description
The invention is further described below with reference to the drawings and examples.
Please refer to fig. 1, which is a schematic structural diagram of a self-rescue device special for elevator pit maintenance according to the present invention. The utility model provides a special self-rescue device of elevator pit maintenance, includes layer door unlocking device 1 and unblanks holding device 2, and layer door unlocking device 1 and unblanking holding device 2 all are located the layer door 7 and are close to one side position of well, and wherein layer door unlocking device 1 is located the below position of layer door lock latch hook 4 and installs on triangle key lock 3, unblanks holding device 2 and is located the below position and movable mounting of layer door unlocking device 1 in layer door 7 lower part.
Specifically, the landing door unlocking device 1 comprises a pusher dog 11 and a long crank 12, wherein the middle part of the pusher dog 11 is arranged on the triangular key lock 3 and rotates synchronously with the triangular key lock 3; specifically, the cam key lock 3 is fixed on the landing door 7 through the cam key outer retainer and the cam key inner retainer, and the pusher dog 11 is fixed on the cam key lock through the cam key inner retainer and the nut. The upper end of the long crank 12 is hinged with the pusher dog 11, the long crank 12 can move up and down relative to the landing door 7, the long crank 12 comprises a vertical part 121 and a bending part 122, the first end of the vertical part 121 is positioned at the lower part of the landing door 7 and is vertically connected with the bending part 122, the second end of the vertical part is hinged with the first end of the pusher dog 11, and the up-and-down movement of the vertical part 121 drives the pusher dog 11 to rotate by taking the triangular key lock 3 as the circle center; the second end of the pusher dog 11 is positioned below the landing door lock hook 4 and is used for jacking up the landing door lock hook 4 so that the landing door lock is in an unlocking state; when the bent portion 122 moves downward and is inserted into the unlock maintaining device 2, the unlock maintaining device 2 can provide a downward force to the bent portion 122 so that the landing door lock maintains an unlocked state.
Please refer to fig. 3 in combination, which is a schematic diagram of the unlocking layer door lock of the self-rescue device for elevator pit maintenance according to the present invention. After the maintenance personnel finish the maintenance of the pit, through pulling the bending part 122 to move downwards, the bending part 122 drives the vertical part 121 to move downwards, and the vertical part 121 drives the first end of the pusher dog 11 to rotate downwards by taking the triangular key lock 3 as the circle center, so that the second end of the pusher dog 11 is driven to rotate upwards by taking the triangular key lock 3 as the circle center until the second end of the pusher dog 11 jacks up the layer door lock hook 4, the layer door lock hook 4 is separated from the layer door lock seat 5, and the layer door lock is in an unlocking state, so that unlocking of the layer door lock is realized. When the maintainer pulls the bending part 122 to move downwards, the bending part 122 of the long crank 12 is pulled downwards to the position of the unlocking maintaining device 2, then the bending part 122 is inserted into the unlocking maintaining device 2, the bending part 122 is applied with downward force through the unlocking maintaining device 2, the position of the bending part 122 is fixed, the downward force applied by the door opening guaranteeing device to the bending part 122 is larger than the reset spring force of the landing door lock hook 4, so that the second end of the pusher dog 11 can be driven by the vertical part 121 to jack up the landing door lock hook 4 all the time, the landing door lock hook 4 is separated from the landing door lock seat 5, the landing door lock is kept in an unlocking state all the time, and the maintainer can release the bending part 122 and the unlocking maintaining device 2 at the moment and then leave a hoistway through a ladder stand to enter a landing room.
Please refer to fig. 2 in combination, which is a schematic diagram of a closing layer door lock of the self-rescue device for elevator pit maintenance according to the present invention. After entering a hall, an maintainer inserts the triangular key lock 3 outside the landing door 7 through the triangular key, rotates in the opposite direction of unlocking the landing door lock, the pusher dog 11 rotates synchronously with the triangular key lock 3, namely, the second end of the pusher dog 11 rotates downwards by taking the triangular key lock 3 as a circle center and is separated from the landing door lock latch hook 4, and the first end of the pusher dog 11 rotates upwards by taking the triangular key lock 3 as the circle center to drive the vertical part 121 to move upwards, and the vertical part 121 drives the bending part 122 to move upwards, so that the bending part 122 is separated from contact with the unlocking and holding device 2, and the landing door lock is restored to a locking state. According to the elevator door lock unlocking device, the unlocking position is moved downwards to the lower part of the landing door 7 from the top end of the landing door 7, so that an maintainer can unlock the landing door lock in a pit without the cooperation of other maintainers, and the landing door lock is kept in the unlocking state by the unlocking and retaining device 2 until the maintainer climbs out of a hoistway, and also without the cooperation of other maintainers, the maintainer can reset the landing door lock to the locking state outside the landing door 7, so that the normal operation of the elevator is recovered.
In the locked state of the landing door lock, considering that the long crank 12 also applies a pulling force to the first end of the pusher dog 11 due to its own weight, so that the second end of the pusher dog 12 touches the landing door lock hook 4, preferably, the elevator pit inspection dedicated self-rescue device of the present invention further comprises a balancing weight 6, and the balancing weight 6 is disposed at the second end of the pusher dog 11. Specifically, the upper end of the balancing weight 6 is provided with a hanging ring, and the hanging ring is fixed on the second end of the pusher dog 11 after penetrating through the hanging ring through a bolt, so that the balancing weight 6 is fixed on the second end of the pusher dog 11. The weight of the long crank 12 can be balanced through the weight of the balancing weight 6, so that when the layer door lock is in a locking state, the condition that the first end of the pusher dog 11 rotates downwards due to the weight pulling force of the long crank 12, and the second end of the pusher dog 11 rotates upwards to touch the layer door lock hook 4 is avoided.
Referring to fig. 4 in combination, a side view of the elevator pit inspection self-rescue device of the present invention mounted on a landing door is shown. Preferably, the unlocking and holding device 2 comprises a holding wheel 21 and an elastic device 22, wherein the holding wheel 21 is arranged on the landing door 7 and can rotate along the circle center, and a groove-shaped notch 211 matched with the bending part 122 is arranged on the outer circumference of the holding wheel; specifically, the holding wheel 21 is provided on the landing door 7 by bolts. The elastic device 22 is arranged between the holding wheel 21 and the landing door 7; when the bending portion 122 moves downward and is inserted into the groove-shaped notch 211, the elastic means 22 can provide a counterclockwise circumferential force to the holding wheel 21 so that the holding wheel 21 provides a downward force to the bending portion 122.
When the holding wheel 21 is in the non-working state, the groove-shaped notch 211 on the holding wheel 21 faces downwards due to the action of the elastic device 22. While the maintainer pulls the bending part 122 to move downwards, the holding wheel 21 is rotated clockwise to a proper position along the circle center, then the bending part 122 is inserted into the groove notch 211 of the holding wheel 21, at this time, the elastic device 22 can provide a counterclockwise circumferential force for the holding wheel 21, so that the holding wheel 21 applies a downward force to the bending part 122, the bending part 122 is clamped in the groove notch 211, and at this time, the bending part 122 and the groove notch 211 of the holding wheel 21 are in the same horizontal line. The bending part 122 drives the vertical part 121 to apply a downward rotating force to the first end of the pusher dog 11 by taking the triangular key lock 3 as a circle center, so that the second end of the pusher dog 11 always jacks up the layer door lock hook 4, the layer door lock hook 4 is separated from the layer door lock seat 5, and the layer door lock is always in an unlocking state. Preferably, the elastic device 22 comprises a torsion spring 221 and a limit screw 222, the limit screw 222 is arranged on the landing door 7, one end of the torsion spring 221 is fixed on the retaining wheel 21, and the other end of the torsion spring 221 is abutted against the limit screw 222. When the maintenance person rotates the holding wheel 21 clockwise around the center of the circle, the torsion spring 221 is in a compressed state, and thus when the maintenance person releases the holding wheel 21, the torsion spring 221 applies a counterclockwise circumferential force to the holding wheel 21. The elastic device 22 may also be other mechanical parts with elastic force, for example, the elastic device 22 includes an arc spring and a limit screw 222, one end of the arc spring is fixed on the holding wheel 21, the other end of the arc spring is fixed on the limit screw 222, the arc center position of the arc spring is located at the circle center position of the holding wheel 21, when the maintenance personnel rotates the holding wheel 21 clockwise along the circle center, the arc spring is in a compressed state, and when the maintenance personnel releases the holding wheel 21, the arc spring applies a counterclockwise circumferential force to the holding wheel 21.
The present invention is not limited to the above-described embodiments, but, if various modifications or variations of the present invention are not departing from the spirit and scope of the present invention, the present invention is intended to include such modifications and variations as fall within the scope of the claims and the equivalents thereof.
Claims (4)
1. The special self-rescue device for elevator pit overhaul is characterized by comprising a landing door unlocking device and an unlocking retaining device, wherein the landing door unlocking device and the unlocking retaining device are both positioned at one side position of a landing door, which is close to a hoistway, the landing door unlocking device is positioned below a landing door lock hook and is arranged on a triangular key lock, and the unlocking retaining device is positioned below the landing door unlocking device and is movably arranged at the lower part of the landing door;
the landing door unlocking device comprises a pusher dog and a long crank, wherein the middle part of the pusher dog is arranged on the triangular key lock and rotates synchronously with the triangular key lock;
the long crank comprises a vertical part and a bending part, a first end of the vertical part is positioned at the lower part of the landing door and is vertically connected with the bending part, a second end of the vertical part is hinged with a first end of the pusher dog, and the up-and-down movement of the vertical part drives the pusher dog to rotate by taking the triangular key lock as a circle center;
the second end of the pusher dog is positioned below the landing door lock hook and is used for jacking up the landing door lock hook so that the landing door lock is in an unlocking state;
the unlocking and retaining device comprises a retaining wheel and an elastic device, wherein the retaining wheel is arranged on the landing door and can rotate along the circle center, and a groove-shaped notch matched with the bending part is formed in the outer circumference of the retaining wheel;
the elastic device is arranged between the holding wheel and the landing door;
when the bending part moves downwards and is inserted into the groove-shaped notch, the elastic device can provide anticlockwise circumferential force for the holding wheel, so that the holding wheel provides downward force for the bending part, and the layer door lock is kept in an unlocking state.
2. The self-rescue device special for elevator pit maintenance according to claim 1, wherein the elastic device comprises a torsion spring and a limit screw, the limit screw is arranged on the landing door, one end of the torsion spring is fixed on the holding wheel, and the other end of the torsion spring is propped against the limit screw.
3. The self-rescue device special for elevator pit overhaul as claimed in claim 1, wherein the elastic device comprises an arc spring and a limit screw, the limit screw is arranged on the landing door, one end of the arc spring is fixed on the holding wheel, the other end of the arc spring is fixed on the limit screw, and the arc center position of the arc spring is the same as the circle center position of the holding wheel.
4. The elevator pit inspection dedicated self-rescue device of claim 1, further comprising a counterweight disposed at the second end of the finger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910543134.0A CN110155843B (en) | 2019-06-21 | 2019-06-21 | Elevator pit overhauls special device of saving oneself |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910543134.0A CN110155843B (en) | 2019-06-21 | 2019-06-21 | Elevator pit overhauls special device of saving oneself |
Publications (2)
| Publication Number | Publication Date |
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| CN110155843A CN110155843A (en) | 2019-08-23 |
| CN110155843B true CN110155843B (en) | 2023-12-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910543134.0A Active CN110155843B (en) | 2019-06-21 | 2019-06-21 | Elevator pit overhauls special device of saving oneself |
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| Country | Link |
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| CN (1) | CN110155843B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111410105B (en) * | 2020-03-05 | 2021-09-14 | 日立电梯（中国）有限公司 | Elevator system, maintenance safety device and transmission mechanism |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20060036381A (en) * | 2005-11-15 | 2006-04-28 | 미쓰비시덴키 가부시키가이샤 | Unlocking device of elevator landing door and method of modifying the device |
| JP2011037553A (en) * | 2009-08-07 | 2011-02-24 | Mitsubishi Electric Corp | Unlocking device of landing door lock device of elevator |
| CN203461671U (en) * | 2013-09-10 | 2014-03-05 | 宁波欧菱电梯配件有限公司 | Elevator floor door locking device provided with remote unlocking stay cord |
| WO2017098557A1 (en) * | 2015-12-07 | 2017-06-15 | 三菱電機株式会社 | Landing door opening device for elevator |
| CN107473061A (en) * | 2016-06-08 | 2017-12-15 | 奥的斯电梯公司 | The maintenance safety device and its operating method of elevator system |
| CN207566698U (en) * | 2017-11-09 | 2018-07-03 | 西继迅达（许昌）电梯有限公司 | A kind of elevator and its hall door unlocking apparatus |
| CN210150536U (en) * | 2019-06-21 | 2020-03-17 | 广州广日电梯工业有限公司 | Elevator pit overhauls special device of saving oneself |
| CN210393364U (en) * | 2019-06-27 | 2020-04-24 | 广州广日电梯工业有限公司 | Elevator and landing door protection device thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FI125118B (en) * | 2013-01-07 | 2015-06-15 | Kone Corp | Elevator |
-
2019
- 2019-06-21 CN CN201910543134.0A patent/CN110155843B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20060036381A (en) * | 2005-11-15 | 2006-04-28 | 미쓰비시덴키 가부시키가이샤 | Unlocking device of elevator landing door and method of modifying the device |
| JP2011037553A (en) * | 2009-08-07 | 2011-02-24 | Mitsubishi Electric Corp | Unlocking device of landing door lock device of elevator |
| CN203461671U (en) * | 2013-09-10 | 2014-03-05 | 宁波欧菱电梯配件有限公司 | Elevator floor door locking device provided with remote unlocking stay cord |
| WO2017098557A1 (en) * | 2015-12-07 | 2017-06-15 | 三菱電機株式会社 | Landing door opening device for elevator |
| JP6456519B2 (en) * | 2015-12-07 | 2019-01-23 | 三菱電機株式会社 | Elevator landing door opening device |
| CN107473061A (en) * | 2016-06-08 | 2017-12-15 | 奥的斯电梯公司 | The maintenance safety device and its operating method of elevator system |
| CN207566698U (en) * | 2017-11-09 | 2018-07-03 | 西继迅达（许昌）电梯有限公司 | A kind of elevator and its hall door unlocking apparatus |
| CN210150536U (en) * | 2019-06-21 | 2020-03-17 | 广州广日电梯工业有限公司 | Elevator pit overhauls special device of saving oneself |
| CN210393364U (en) * | 2019-06-27 | 2020-04-24 | 广州广日电梯工业有限公司 | Elevator and landing door protection device thereof |
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| CN110155843A (en) | 2019-08-23 |
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