CN113291960B - Elevator door safety device and elevator - Google Patents
Elevator door safety device and elevator Download PDFInfo
- Publication number
- CN113291960B CN113291960B CN202110583561.9A CN202110583561A CN113291960B CN 113291960 B CN113291960 B CN 113291960B CN 202110583561 A CN202110583561 A CN 202110583561A CN 113291960 B CN113291960 B CN 113291960B
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- side plate
- plate
- movable plate
- door
- movable
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- 230000000149 penetrating effect Effects 0.000 claims description 6
- 230000001960 triggered effect Effects 0.000 abstract description 6
- 230000009471 action Effects 0.000 abstract description 2
- 238000013461 design Methods 0.000 abstract description 2
- 238000006073 displacement reaction Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B13/00—Doors, gates, or other apparatus controlling access to, or exit from, cages or lift well landings
- B66B13/24—Safety devices in passenger lifts, not otherwise provided for, for preventing trapping of passengers
- B66B13/245—Safety devices in passenger lifts, not otherwise provided for, for preventing trapping of passengers mechanical
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B13/00—Doors, gates, or other apparatus controlling access to, or exit from, cages or lift well landings
- B66B13/02—Door or gate operation
- B66B13/14—Control systems or devices
- B66B13/143—Control systems or devices electrical
- B66B13/146—Control systems or devices electrical method or algorithm for controlling doors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B13/00—Doors, gates, or other apparatus controlling access to, or exit from, cages or lift well landings
- B66B13/24—Safety devices in passenger lifts, not otherwise provided for, for preventing trapping of passengers
- B66B13/28—Safety devices in passenger lifts, not otherwise provided for, for preventing trapping of passengers between car or cage and wells
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B13/00—Doors, gates, or other apparatus controlling access to, or exit from, cages or lift well landings
- B66B13/30—Constructional features of doors or gates
- B66B13/306—Details of door jambs
Landscapes
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Mechanical Engineering (AREA)
- Elevator Door Apparatuses (AREA)
Abstract
The invention discloses an elevator door safety device and an elevator, wherein the elevator comprises a door plate and a door frame upright post, the door frame upright post comprises a first side plate, a second side plate and a third side plate, the first side plate and the third side plate are respectively positioned at two sides of the second side plate, the first side plate is positioned between the second side plate and the door plate, the safety device comprises a movable plate, an elastic piece and a limit switch, the movable plate is positioned between the second side plate and the door plate, the elastic piece and the limit switch are positioned between the first side plate and the movable plate, the elastic piece is used for providing a trend that the movable plate moves towards a direction far away from the first side plate, and the limit switch is used for stopping the door plate to act. The safety device is reasonable in structural design, and when a hand or an object touches the movable plate to move, the limit switch is triggered to stop the action of the door plate, so that the hand or other objects are prevented from being clamped; and the release of the elastic piece can reset the movable plate, so that the elevator can be ensured to continue to normally run.
Description
Technical Field
The invention relates to the technical field of elevators, in particular to an elevator door safety device and an elevator comprising the safety device.
Background
With the rapid development of social economy and the continuous improvement of the living standard of common people, elevators have become an indispensable part of people's daily life. At present, the elevator is widely used in places such as markets, office buildings, residential buildings and the like, and the use safety of the elevator is also increasingly emphasized. In general, in order to ensure normal operation of an elevator, a gap with a certain distance is allowed between a door plate and a door frame upright post of the elevator.
When a passenger takes an elevator or waits for the elevator, when the body of the passenger leans against the elevator, hands or other objects on the body possibly contact the door plate, so that the hands or the foreign matters are brought into gaps between the door plate and the door frame upright post when the elevator is opened, if a hand clamping event occurs, the body of the passenger is damaged, or the foreign matters are involved in and then damage the elevator, and the normal operation of the elevator can be influenced.
Disclosure of Invention
In view of the above, the present invention aims to overcome the drawbacks of the prior art, and the technical problem to be solved by the present invention is to provide an elevator door safety device, which can prevent unexpected occurrence by triggering a limit switch to stop the elevator operation when a passenger's hand or object is brought into a gap between a door panel and a door frame upright post.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
the utility model provides an elevator door safety device, the elevator includes door plant and door frame stand, the door frame stand includes first curb plate, second curb plate and third curb plate, first curb plate and third curb plate are parallel to each other and perpendicular to the door plant sets up, the second curb plate is on a parallel with the door plant sets up, first curb plate and third curb plate are located the both ends of second curb plate just are located respectively the both sides of second curb plate, first curb plate is located the second curb plate with between the door plant, safety device includes fly leaf, elastic component and limit switch, the fly leaf is located between second curb plate and the door plant, elastic component and limit switch are located between first curb plate and the fly leaf, the one end of elastic component is used for acting on the first curb plate, the other end of elastic component is used for acting on the fly leaf, the elastic component is used for providing and makes the fly leaf has to keeping away from the trend of first curb plate direction motion, limit switch is used for making the door plant stop action.
Through the arrangement of the movable plate, the elastic piece and the limit switch, when a body or an object is driven by the door plate to move, the movable plate can be touched, the elastic piece can be compressed when the movable plate is pushed, when the movable plate moves to be in contact with the limit switch, the elevator can stop moving, further occurrence of unexpected situations is prevented, and elevator clamping hands or other objects can be effectively avoided; when the external force withdraws from the movable plate, the compressed elastic piece can be released to drive the movable plate to reset, so that the elevator can continue to normally run.
Preferably, the door frame pillar includes a fourth side plate parallel to the second side plate, the first side plate is connected between the second side plate and the fourth side plate, and the movable plate is accommodated between the second side plate and the fourth side plate; the fourth side plate is provided with a first through hole penetrating through the thickness direction of the fourth side plate, and the first through hole is formed in one side, away from the first side plate, of the fourth side plate.
Preferably, the door frame upright post further comprises a fifth side plate parallel to the first side plate, the fifth side plate is arranged between the second side plate and the fourth side plate, the first side plate and the fifth side plate are respectively positioned on two opposite sides of the movable plate, a second through hole penetrating through the thickness direction of the fifth side plate is formed in the fifth side plate, and the second through hole is communicated with the first through hole, namely, the second through hole is formed in one side, far away from the second side plate, of the fifth side plate. The fifth side plate is combined with the first side plate, so that the left and right movement of the movable plate can be limited, and the movable plate cannot slide out of the door frame upright post; the second port is communicated with the first port, so that when hands or other objects extend into a gap between the door plate and the door frame upright post, the movable plate is easier to touch, and the movable plate is pushed to move so as to trigger the limit switch.
Further preferably, the length of the movable plate is greater than the lengths of the first opening and the second opening, the width of the movable plate is smaller than the width of the first opening, and the thickness of the movable plate is greater than or equal to the width of the second opening. The length of the movable plate is longer than that of the first through hole and the second through hole, so that the movable plate can be effectively fixed between the second side plate and the fourth side plate to prevent the movable plate from falling out; the width of the movable plate is smaller than that of the first through hole, so that the movable plate has a movable displacement interval, and can move along the opening direction of the elevator to trigger the limit switch when an external force is applied.
Preferably, the length direction of the elastic piece is perpendicular to the length direction of the movable plate, the length of the elastic piece in a natural state is larger than the length of the limit switch, and the sum of the length of the elastic piece in the natural state and the width of the movable plate is smaller than or equal to the distance between the first side plate and the fifth side plate. The length direction of the elastic piece is perpendicular to the length direction of the movable plate, namely, the elastic piece stretches and contracts along the moving direction of the movable plate. In some embodiments of the invention, the length of the elastic piece in a natural state is larger than that of the limit switch, so that on one hand, when the movable plate is not subjected to external force or is subjected to small external force, displacement is not generated or the moving distance is short enough to trigger the limit switch, thereby avoiding mistaken touching of the limit switch and ensuring normal operation of the elevator; on the other hand, the elastic piece is compressed when the movable plate is triggered to the limit switch, and the elastic piece is released when external force is withdrawn so as to reset the movable plate; the sum of the length of the elastic piece in the natural state and the width of the movable plate is smaller than the distance between the first side plate and the fifth side plate, so that the elastic piece is not compressed when the elevator normally operates, the movable plate is pushed to drive the elastic piece to compress, an effective compression stroke is guaranteed, the movable plate can touch the limit switch, and effective operation of the safety device is guaranteed.
More preferably, the sliding rail comprises a sliding rail and a pulley sliding along the sliding rail, one of the door frame upright post and the movable plate is provided with the sliding rail, and the rest of the door frame upright post and the movable plate is provided with the pulley. The pulley block is on the slide rail, and the two mutually support, make things convenient for the left and right movement of fly leaf, and restrict the fly leaf to upwards or the downward movement, prevent that the fly leaf from dropping.
Further preferably, the upper end and the lower end of the second side plate are both provided with the sliding rail, the upper end and the lower end of the movable plate are both provided with the pulley, and the movable plate is slidably mounted on the sliding rail. The sliding rail and the pulley are arranged to increase the flexibility of the moving plate, so that the sensitivity of the safety device is improved.
Further preferably, the movable plate is provided with a bump, the bump is located between the movable plate and the door plate and penetrates through the first through hole, and the size of the bump is smaller than that of the movable plate. The lug is located between the movable plate and the door plate and penetrates through the first through hole, a gap is reserved between the movable plate and the door plate, and after hands or objects of passengers extend into the gap between the door plate and the door frame stand column, the movable plate can be touched, so that the safety device is triggered to operate, and accidents are avoided.
Preferably, at least two elastic pieces are arranged, and the elastic pieces are uniformly arranged between the movable plate and the first side plate at intervals. In some embodiments of the invention, two elastic pieces are arranged symmetrically about the limit switch, which is beneficial to the uniform stress of the elastic pieces, so that the movable plate can move stably, and the effective operation of the safety device is ensured. In other embodiments of the present invention, three or more elastic members may be disposed at even intervals, and the elastic members may be disposed at even intervals, so as to exert an effect of making the stress on the elastic members even.
The invention also provides an elevator comprising a safety device as described above. The safety devices are respectively arranged between the door plates at the two sides of the elevator and the corresponding door frame upright posts.
Compared with the prior art, the invention has the following advantages: the elevator door safety device is reasonable in structural design and simple in structure, the elastic piece and the limit switch are arranged between the movable plate and the first side plate, the movable plate is positioned between the second side plate and the door plate, when a hand or an object is extruded between the door plate and the movable plate along the door opening direction, the movable plate can be driven to move along the door opening direction by friction force so as to trigger the limit switch, so that the door plate is stopped, and the hand or other objects are prevented from being clamped; the release of the elastic piece can also reset the movable plate, so that the elevator can be ensured to continue to normally run.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic view of an elevator in which a safety device is installed in an embodiment of the present invention;
fig. 2 is a cross-sectional view of an elevator with a safety device installed in an embodiment of the invention;
wherein: 1-door plank, 2-door frame upright post, 21-first side plate, 22-second side plate, 23-third side plate, 24-fourth side plate, 241-first through hole, 25-fifth curb plate, 3-fly leaf, 4-elastic component, 5-limit switch, 6-slide rail, 7-pulley, 8-lug.
Detailed Description
In order to make the technical solution of the present invention better understood by those skilled in the art, the technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
Referring to fig. 1 to 2, the elevator of the present embodiment includes conventional parts such as a door panel 1, a door frame pillar 2, and the like, and a safety device. The door frame upright post 2 is integrally bent and formed and comprises a first side plate 21, a second side plate 22, a third side plate 23, a fourth side plate parallel to the second side plate 22 and a fifth side plate 25 parallel to the first side plate 21. The first side plate 21 and the third side plate 23 are parallel to each other and perpendicular to the door panel 1, the first side plate 21 and the third side plate 23 are respectively located at two sides of the second side plate 22, the first side plate is connected between the second side plate 22 and the fourth side plate 24, the second side plate 22 is parallel to the door panel 1, the fifth side plate 25 is arranged between the second side plate 22 and the fourth side plate 24, and the first side plate 21 and the fifth side plate 25 are respectively located at two opposite sides of the movable plate 3. Wherein, the fourth side plate 24 is provided with a first through hole 241 penetrating through the thickness direction thereof at one side far away from the first side plate 21, and the width of the first through hole 241 is smaller than the width of the fourth side plate 24; the fifth side plate 25 is provided with a second opening penetrating through the thickness direction of the fifth side plate 25, the width of the second opening is equal to that of the fifth side plate 25, the second opening is communicated with the first opening 241, namely, the fourth side plate 24 and the fifth side plate 25 are provided with openings at positions close to the landing door, so that a passenger can touch the movable plate 3 in time after the passenger's hand or an object enters the gap by mistake, and the safety device is triggered to operate.
The elevator door safety device in this embodiment includes a movable plate 3, an elastic member 4, a limit switch 5, a limit device, and a bump 8 disposed on the movable plate 3, where the elastic member 4 is preferably a spring in this embodiment.
Wherein the movable plate 3 is accommodated in a space formed by the first side plate, the second side plate, the fourth side plate and the fifth side plate. In this embodiment, the length of the movable plate 3 is greater than the lengths of the first opening 241 and the second opening, which is beneficial to effectively fixing the movable plate 3 between the second side plate 22 and the fourth side plate 24, and preventing the movable plate 3 from falling out or falling; the width of the movable plate 3 is smaller than that of the first through hole 241, so that the movable plate 3 can have a displacement interval along the elevator door opening direction when an external force is applied, and the limit switch 5 can be triggered after a certain distance of movement; the thickness of the movable plate 3 is equal to the width of the second opening. The movable plate 3 is also provided with a bump 8 which is positioned between the movable plate 3 and the door plate 1 and penetrates through the first through hole 241, and a gap is reserved between the bump 8 and the door plate 1; the size of the bump 8 is smaller than the size of the movable plate 3, specifically, the width of the bump 8 is equal to the width of the movable plate 3, and the length of the bump 8 is equal to the length of the first through hole 241. The bump 8 can further limit the movable plate 3, so as to limit the movable plate 3 to move upwards or downwards and prevent the movable plate 3 from falling off; and ensure that the passenger's hand or article can touch the fly leaf 3 after mistake goes into the space to trigger this safety device operation, avoid taking place the accident.
In this embodiment, a limit switch 5 and two elastic members 4 symmetrically arranged about the limit switch are arranged between a first side plate 21 and a movable plate 3, wherein the limit switch 5 is used for stopping the door plate 1 from moving; the two symmetrically arranged elastic members 4 are beneficial to the uniform stress of the elastic members 4, one end of the elastic member 4 is used for acting on the first side plate 21, and the other end of the elastic member is used for acting on the movable plate 3, so that the movable plate 3 has a tendency to move steadily away from the first side plate 21. The length direction of the elastic piece 4 is perpendicular to the length direction of the movable plate 3, and the length of the elastic piece 4 in a natural state is larger than the length of the limit switch 5, so that on one hand, when the elevator is in normal operation, the movable plate 3 is not subjected to external force or is subjected to small external force, displacement is not generated or the moving distance is short enough to trigger the limit switch 5, the limit switch 5 can be prevented from being touched by mistake, and the normal operation of the elevator is ensured; on the other hand, the elastic piece 4 is compressed when the movable plate 3 is triggered to the limit switch 5, so that the elastic piece 4 is released to reset the movable plate 3 when the external force is withdrawn; the sum of the length of the elastic member 4 in the natural state and the width of the movable plate 3 is smaller than the distance between the first side plate 21 and the fifth side plate 25 to ensure that the elastic member 4 is not compressed when the elevator is in normal operation, so that the movable plate 3 is pushed to enable the elastic member 4 to have an effective compression stroke when being compressed, the movable plate 3 can touch the limit switch 5, and effective operation of the safety device is ensured.
The limiting device comprises a sliding rail 6 arranged at the upper end part and the lower end part of the second side plate 22, and a pulley 7 arranged at the upper end part and the lower end part of the movable plate 3, wherein the movable plate 3 is slidably arranged on the sliding rail 6, so that the pulley 7 slides along the sliding rail 6. The limiting device can facilitate the movement of the movable plate, limit the upward or downward movement of the movable plate 3 and prevent the movable plate 3 from falling; and the arrangement of the sliding rail 6 and the pulley 7 can increase the flexibility of the moving plate 3, thereby improving the sensitivity of the safety device.
The working principle of the elevator door safety device of the invention is as follows: when the hand or the object of the passenger stretches into the gap between the door plate 1 and the door frame upright post 2 along the opening direction, the movable plate 3 is touched, and the movable plate 3 can be driven to move along the opening direction and gradually approach the first side plate 21 by the friction force between the hand or the object and the movable plate 3. In this process, the elastic member 4 is also gradually compressed, when the movable plate 3 moves to contact with the limit switch 5, the movable plate 3 cannot continue to move, at this time, the door plate 1 stops moving, the passenger's hand or object can be taken out from the gap, at this time, no external force is applied to the movable plate 3, and then the elastic member 4 is released to drive the movable plate 3 to reset, so that the elevator can continue to operate normally.
The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the present invention and to implement the same, but are not intended to limit the scope of the present invention, and all equivalent changes or modifications made according to the spirit of the present invention should be included in the scope of the present invention.
Claims (2)
1. The elevator door safety device comprises a door plate and a door frame upright post, and is characterized in that the door frame upright post comprises a first side plate, a second side plate and a third side plate, the first side plate and the third side plate are mutually parallel and perpendicular to the door plate, the second side plate is parallel to the door plate, the first side plate and the third side plate are respectively positioned at two sides of the second side plate, the first side plate is positioned between the second side plate and the door plate, the safety device comprises a movable plate, an elastic piece and a limit switch, the movable plate is positioned between the second side plate and the door plate, the elastic piece and the limit switch are positioned between the first side plate and the movable plate, one end of the elastic piece is used for acting on the first side plate, the other end of the elastic piece is used for acting on the movable plate, the elastic piece is used for providing a trend of enabling the movable plate to move towards a direction away from the first side plate, and the limit switch is used for enabling the door plate to stop moving;
the door frame upright post comprises a fourth side plate parallel to the second side plate, the first side plate is connected between the second side plate and the fourth side plate, and the movable plate is accommodated between the second side plate and the fourth side plate; the fourth side plate is provided with a first through hole penetrating through the thickness direction of the fourth side plate, and the first through hole is formed in one side, away from the first side plate, of the fourth side plate;
the door frame comprises a limiting device, wherein the limiting device comprises a sliding rail and a pulley sliding along the sliding rail, one of a door frame upright post and a movable plate is provided with the sliding rail, and the rest of the door frame upright post and the movable plate is provided with the pulley; the upper end part and the lower end part of the second side plate are respectively provided with the sliding rail, the upper end part and the lower end part of the movable plate are respectively provided with the pulleys, and the movable plate is slidably arranged on the sliding rail; the movable plate is provided with a lug which is positioned between the movable plate and the door plate and penetrates through the first through hole, and the size of the lug is smaller than that of the movable plate;
the door frame upright post also comprises a fifth side plate parallel to the first side plate, the fifth side plate is arranged between the second side plate and the fourth side plate, the first side plate and the fifth side plate are respectively positioned at two opposite sides of the movable plate, a second through hole penetrating through the fifth side plate in the thickness direction is formed in the fifth side plate, and the second through hole is communicated with the first through hole;
the length of the movable plate is larger than the lengths of the first opening and the second opening, the width of the movable plate is smaller than the width of the first opening, and the thickness of the movable plate is larger than or equal to the width of the second opening; the length direction of the elastic piece is perpendicular to the length direction of the movable plate, the length of the elastic piece in a natural state is larger than the length of the limit switch, and the sum of the length of the elastic piece in the natural state and the width of the movable plate is smaller than or equal to the distance between the first side plate and the fifth side plate;
the elastic pieces are at least two, and the elastic pieces are uniformly arranged between the movable plate and the first side plate at intervals.
2. An elevator comprising the elevator door safety device of claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110583561.9A CN113291960B (en) | 2021-05-27 | 2021-05-27 | Elevator door safety device and elevator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110583561.9A CN113291960B (en) | 2021-05-27 | 2021-05-27 | Elevator door safety device and elevator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113291960A CN113291960A (en) | 2021-08-24 |
| CN113291960B true CN113291960B (en) | 2024-02-23 |
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ID=77325510
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110583561.9A Active CN113291960B (en) | 2021-05-27 | 2021-05-27 | Elevator door safety device and elevator |
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| Country | Link |
|---|---|
| CN (1) | CN113291960B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022228847A1 (en) * | 2021-04-28 | 2022-11-03 | Inventio Ag | Shaft door with a door guard arrangement |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08268672A (en) * | 1995-03-31 | 1996-10-15 | Toshiba Corp | Gate for elevator |
| JP2002020066A (en) * | 2000-07-03 | 2002-01-23 | Hitachi Building Systems Co Ltd | Safety device for elevator car door |
| CN1970423A (en) * | 2006-12-04 | 2007-05-30 | 杭州西子孚信科技有限公司 | Clamp-proof device |
| CN103538993A (en) * | 2013-10-26 | 2014-01-29 | 胡吉安 | Safety system for preventing hand nipping during elevator door opening |
| CN208378155U (en) * | 2018-04-27 | 2019-01-15 | 苏州江南嘉捷电梯有限公司 | A kind of anti-towing gear of elevator door |
| CN210944469U (en) * | 2019-09-25 | 2020-07-07 | 西继迅达电梯有限公司 | Prevent tong lift-cabin door system |
-
2021
- 2021-05-27 CN CN202110583561.9A patent/CN113291960B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08268672A (en) * | 1995-03-31 | 1996-10-15 | Toshiba Corp | Gate for elevator |
| JP2002020066A (en) * | 2000-07-03 | 2002-01-23 | Hitachi Building Systems Co Ltd | Safety device for elevator car door |
| CN1970423A (en) * | 2006-12-04 | 2007-05-30 | 杭州西子孚信科技有限公司 | Clamp-proof device |
| CN103538993A (en) * | 2013-10-26 | 2014-01-29 | 胡吉安 | Safety system for preventing hand nipping during elevator door opening |
| CN208378155U (en) * | 2018-04-27 | 2019-01-15 | 苏州江南嘉捷电梯有限公司 | A kind of anti-towing gear of elevator door |
| CN210944469U (en) * | 2019-09-25 | 2020-07-07 | 西继迅达电梯有限公司 | Prevent tong lift-cabin door system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113291960A (en) | 2021-08-24 |
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