CN104609286B - Elevator car door lock device - Google Patents
Elevator car door lock device Download PDFInfo
- Publication number
- CN104609286B CN104609286B CN201510009334.XA CN201510009334A CN104609286B CN 104609286 B CN104609286 B CN 104609286B CN 201510009334 A CN201510009334 A CN 201510009334A CN 104609286 B CN104609286 B CN 104609286B
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- Prior art keywords
- lock
- assembly
- roller
- hook
- arm piece
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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
- B66B13/16—Door or gate locking devices controlled or primarily controlled by condition of cage, e.g. movement or position
Abstract
The invention discloses an elevator car door lock device, which comprises a lock seat assembly fixed on a door machine bottom plate, a hook lock assembly fixed on a door machine hanging plate and a baffle plate assembly fixed on an upper sill of a hoistway door of each floor, wherein a lock hole is formed in the lock seat assembly, the hook lock assembly comprises a roller and a movable hook lock driven by the roller, a hook part is fixedly arranged on the movable hook lock, when the roller is not contacted with the baffle plate assembly and is positioned on one side of the baffle plate assembly close to the lock seat assembly, the hook part is positioned in the lock hole, and when the roller is not contacted with the baffle plate assembly and is positioned on one side of the baffle plate assembly far away from the lock seat assembly, the hook part is separated from the lock hole. The invention ensures that the elevator door motor does not need to work all the time when the car door plate is in a closed state, and the car door plate can not be automatically opened when the elevator door motor is stopped.
Description
Technical Field
The invention relates to the technical field of elevators, in particular to an elevator car door lock device.
Background
Present elevator car door lock device is generally for hitting the bow formula, it includes hook lock subassembly and lock seat subassembly, all be fixed with one on the bank on the lobby of every floor and hit the bow, the hook lock subassembly is fixed on the door machine bottom plate, be provided with the gyro wheel on the hook lock subassembly, activity hook lock and pressure spring, the hook lock subassembly can be by the flexible and horizontal migration of pressure spring, lock seat subassembly is fixed and can be along with door machine link plate synchronous motion on the door machine link plate, when the sedan-chair door board is in the closure state, lock seat subassembly withstands the hook lock subassembly, the pressure spring is compressed this moment, when elevator car is located the non-flat zone, when the sedan-chair door board tries to open, the activity hook lock on the hook lock subassembly can hook with lock seat subassembly each other, make lock seat subassembly can's horizontal migration because of the promotion of pressure spring, make the bow on the hook lock subassembly, make the activity on the hook lock subassembly bump against the gyro wheel, thereby make the activity lock subassembly swing along with the door machine link plate remove, thereby make the lock subassembly normally.
According to the elevator car door lock device, when the car door plate is closed, the pressure spring on the hook lock component contracts, and the pressure spring has rebound force on the hook lock component, so that the car door plate is in a closed state due to the fact that the elevator door motor always works, once the elevator door motor stops working, the rebound force of the pressure spring can push the hook lock component to move, the hook lock component can push the lock seat component to move, the car door plate can be automatically slightly opened, a gap is formed between the two car door plates, so that the elevator door motor always works, and the elevator door motor can generate large heat and has high power consumption; in addition, if the elevator door machine is powered off and stops, the car door plate can be automatically slightly opened, so that the elevator is in failure and the elevator stops immediately.
Disclosure of Invention
The invention aims to solve the technical problem of providing an elevator car door lock device, which ensures that an elevator door motor does not need to work all the time when a car door panel is in a closed state, and the car door panel can not be automatically opened when the elevator door motor is stopped.
In order to solve the above technical problems, the present invention provides an elevator car door lock apparatus, comprising:
the lock seat component is fixed on the door machine bottom plate, and a strip-shaped lock hole extending along the moving direction of the door machine hanging plate relative to the door machine bottom plate is arranged on the lock seat component;
the hook lock assembly is fixed on the door machine hanging plate and comprises a roller and a movable hook lock driven by the roller, a hook part is fixedly arranged on the movable hook lock, and when the hook part is positioned in the lock hole, the hook part can slide along the length direction of the lock hole and is limited at the end part of the lock hole; and
the baffle plate assembly is fixed on a hoistway door sill on each floor, the working surface on the baffle plate assembly is arranged in the vertical direction, and the working surface on each baffle plate assembly comprises two guide inclined surfaces which are used for being in rolling fit with the rollers to enable the movable hook lock to swing and a supporting surface which is arranged between the two guide inclined surfaces and is used for being in rolling fit with the rollers to enable the hook part to be kept at a position separated from the lock hole;
when the roller does not contact the baffle assembly and is positioned on one side of the baffle assembly close to the lock seat assembly, the hook portion is positioned in the lock hole, and when the roller does not contact the baffle assembly and is positioned on one side of the baffle assembly far away from the lock seat assembly, the hook portion is separated from the lock hole.
After adopting the structure, compared with the prior art, the invention has the following advantages:
according to the elevator door panel, the hook lock assembly is driven to move through the door machine hanging plate, when the elevator is in a non-flat zone, when the elevator door panel is tried to be opened, the hook part on the movable hook lock is limited at the end part of the lock hole, so that the hook lock assembly cannot move, the elevator door panel cannot be opened, when the elevator is in the flat zone, the baffle plate assembly enables the roller to swing, the hook part on the movable hook lock is separated from the lock hole, the hook lock assembly can freely move, and the elevator door panel can be opened.
As an improvement, the hook lock assembly further comprises a support and an arm piece, a first hinge shaft in the horizontal direction and a second hinge shaft in the vertical direction are arranged on the support, the movable hook lock is hinged to the first hinge shaft, the arm piece is hinged to the second hinge shaft, a horizontal rod is arranged on the movable hook lock, a vertical rod is arranged on the arm piece, the side wall of the horizontal rod abuts against the side wall of the vertical rod, the roller is horizontally arranged and fixed on the arm piece, when the roller swings to drive the arm piece to swing, the vertical rod drives the movable hook lock to swing through the horizontal rod to enable the hook portion to move upwards, the hook portion is located at one end of the movable hook lock, and a pressure spring for automatically resetting after the movable hook lock swings is arranged between the other end of the movable hook lock and the support. In the technical scheme, the movable hook lock swings in the vertical plane, so that once the pressure spring for automatically resetting after the movable hook lock swings fails, the movable hook lock can automatically swing downwards to reset under the action of self gravity, and the reliability is higher.
As an improvement, the bracket is further provided with a stopping part for stopping the movable hook lock when the movable hook lock swings, the arm part comprises an upper arm part and a lower arm part, the roller is arranged on the upper arm part, the vertical rod is arranged on the lower arm part, the upper connecting sleeve on the upper arm part and the lower connecting sleeve on the lower arm part are movably sleeved on the second hinge shaft, the upper connecting sleeve and the lower connecting sleeve are vertically superposed, a torsion spring is positioned between the upper arm part and the lower arm part and sleeved on the upper connecting sleeve and the lower connecting sleeve, and two ends of the torsion spring are respectively fixed with the upper arm part and the lower arm part. In this technical scheme, after the activity hook lock upwards swings certain angle, the activity hook lock is stopped by backstop portion promptly, can avoid the activity hook lock upwards swing the angle too big to when the activity hook lock is stopped by backstop portion, lower arm can't continue to swing, and the upper arm resists the torsion of torsional spring and continues to swing, like this, if deviation appears in the mounted position between gyro wheel, the baffle subassembly, when the activity hook lock is stopped by backstop portion, the gyro wheel can also remove, avoids appearing the dead condition of card between gyro wheel and the baffle subassembly.
Drawings
FIG. 1 is a schematic view of the combination of a hook lock assembly, a lock seat assembly, a door machine base plate and a door machine hanging plate;
FIG. 2 is a schematic view of the combination of the hook lock assembly, the lock bracket assembly and the flapper assembly;
FIG. 3 is a top view of FIG. 2;
FIG. 4 is an exploded view of the hook lock assembly;
FIG. 5 is a schematic structural view of the movable hook lock being limited by the locking hole;
fig. 6 is a schematic structural view when the movable hook lock is separated from the lock hole.
Wherein, 1, hooking and locking the assembly; 101. a roller; 102. a movable hook lock; 103. a hook portion; 104. a support; 105. a first hinge shaft; 106. a second hinge shaft; 107. a horizontal bar; 108. a vertical rod; 109. a stopper portion; 110. an upper arm member; 111. a lower arm member; 112. connecting sleeves are arranged; 113. a lower connecting sleeve; 114. a torsion spring; 115. a pressure spring; 116. a first stopper; 117. a second stopper; 2. a lock base assembly; 201 lock hole; 3. a door machine bottom plate; 4. a gantry crane hanging plate; 5. a baffle plate assembly; 501. a working plane; 502. a guide slope;
Detailed Description
The present invention will be described in further detail with reference to the drawings and the detailed description.
As shown in fig. 1, the elevator car door lock apparatus of the present invention comprises a lock base assembly 2 fixed to a door machine base plate 3 and a hook lock assembly 1 fixed to a door machine link plate 4.
The lock seat component 2 is provided with a long-strip-shaped lock hole 201 extending along the moving direction of the gantry crane hanging plate 4 relative to the gantry crane bottom plate 3, namely, the gantry crane hanging plate 4 can be driven by a gantry crane to transversely slide on the gantry crane floor 3, and the lock hole 201 transversely extends.
The hook lock assembly 1 comprises a roller 101 and a movable hook lock 102 driven by the roller 101, that is, when the roller 101 moves, the roller 101 can drive the movable hook lock 102 to swing, a hook portion 103 is fixedly arranged on the movable hook lock 102, when the hook portion 103 is located in the lock hole 201, the hook portion 103 can slide along the length direction of the lock hole 201 and is limited at the end of the lock hole 201, and when the hook portion 103 is limited at the end of the lock hole 201, the hook lock assembly 1 cannot move.
As shown in fig. 2, the elevator car door lock apparatus of the present invention further includes a barrier assembly 5, a barrier assembly 5 is fixed to the hoistway door sill at each floor, the working surface of the barrier assembly 5 is disposed in a vertical direction, the working surface of each barrier assembly 5 includes two guide slopes 502 and a support surface 501 disposed between the two guide slopes 502, the two guide slopes 502 are symmetrically disposed, the guide slopes 502 are configured to be in rolling engagement with the roller 101 to swing the movable hook lock 102, and the support surface 501 is configured to be in rolling engagement with the roller 101 to hold the hook 103 at a position separated from the lock hole 201.
In the following description, the guide slope 502 of the shutter assembly 5 on the side close to the latch base assembly 2 is referred to as a first guide slope, and the guide slope 502 of the shutter assembly 5 on the side away from the latch base assembly 2 is referred to as a second guide slope.
As shown in fig. 3, when the car door panel is in the closed state, the roller 101 is not in contact with the baffle assembly 5, in the drawing, B is a vertical distance between the first guide slope and the roller 101, where B is 6 to 10mm, and C is a vertical distance between a plane where the supporting surface 501 is located and a tangent line of the roller 101, which is closer to the baffle assembly 5 and parallel to the supporting surface 501, where C is about 10 mm.
When the roller 101 does not contact the baffle assembly 5 and is located on one side of the baffle assembly 5 close to the lock seat assembly 2, the hook 103 is located in the lock hole 201, when the elevator car is located on a leveling zone and the car door panel is opened, the door hanger plate 4 drives the car door panel to move transversely, meanwhile, the door hanger plate 4 drives the hook lock assembly 1 to move transversely, the roller 101 moves transversely in a direction close to the baffle assembly 5, after the roller 101 moves transversely for a short distance, the roller 101 touches the first guide inclined surface and rolls transversely on the first guide inclined surface, at this time, the roller 101 drives the movable hook lock 102 to gradually swing upwardly, so that the hook 103 is gradually separated from the lock hole 201 (as shown in fig. 6, when the roller 101 rolls on the first guide inclined surface, the roller 101 swings in the a direction a, and then drives the movable hook lock 102 to swing upwardly, so that the hook 103 is separated from the lock hole 201), then the roller 101 rolls on the supporting surface 501 and rolls transversely on the supporting surface, at this time, the hook 103 is kept at a position separated from the lock hole 201, then the roller 101 rolls on the second guide inclined surface and rolls transversely, the lock hole 102 can gradually separate from the door 102, at this time, when the elevator car door panel 101 has moved transversely, the movable hook 102 can move transversely, the roller 101 and the door panel 102 can move transversely, and the elevator car can move transversely, and the door 102 can move transversely, at this time, and the elevator car door 102 can move transversely, and the elevator car door 102 and the elevator car can move transversely, and the lock hole 201, at this time, and the elevator car can move transversely, and the door 102 and the elevator car can move transversely, and the elevator car door 102 and the elevator car can move transversely at this time, and the elevator car door 102 and the elevator car door lock hole 201, and the elevator car can move transversely; when the elevator car is closed, the door hanger plate 4 gradually moves back, when the roller 101 moves to the second guide slope, the roller 101 rolls laterally along the second guide slope, at this time, the movable hook lock 102 swings upward gradually until the roller 101 rolls on the supporting surface 501 and rolls laterally on the supporting surface 501, at this time, the hook 103 has moved to a position above the lock hole 201 along with the swing of the movable hook lock 102, then the roller 101 rolls on the first guide slope and rolls laterally on the first guide slope, at this time, the movable hook lock 102 swings downward gradually, so that the hook 103 moves downward along with the movable hook lock 102 and enters the lock hole 201, and the door closing action of the elevator car is completed.
When elevator car is located the non-flat zone district, when trying to open the sedan-chair door plant, door machine link plate 4 drives 1 lateral shifting of hook lock subassembly, and hook portion 103 is located lockhole 201 this moment, and hook portion 103 will be by the tip backstop of lockhole 201, and like this, hook lock subassembly 1 can't continue to move for door machine link plate 4 can't continue to move, and like this, door machine link plate 4 just can't continue to drive the sedan-chair door plant and open the door, be like the state shown in fig. 5 promptly.
As shown in fig. 4, the hook lock assembly 1 further includes a bracket 104 and an arm member, the bracket 104 is provided with a first hinge shaft 105 in a horizontal direction and a second hinge shaft 106 in a vertical direction, the movable hook lock 102 is hinged on the first hinge shaft 105, the arm member is hinged on the second hinge shaft 106, the movable hook lock 102 is provided with a horizontal rod 107, the arm member is provided with a vertical rod 108, a side wall of the horizontal rod 107 abuts against a side wall of the vertical rod 108, the roller 101 is horizontally arranged and fixed on the arm member, when the roller 101 swings to drive the arm member to swing, the vertical rod 108 drives the movable hook lock 102 to swing through the horizontal rod 107 so as to move the hook portion 103 upward, the hook portion 103 is located at one end of the movable hook lock 102, a pressure spring 115 for automatic reset after the movable hook lock 102 swings is arranged between the other end of the movable hook lock 102 and the support 104, one end of the pressure spring 115 is connected to the movable hook lock 102, the other end of the pressure spring 115 is connected to the support 104, when the roller 101 swings, the roller 101 drives the arm to swing, so that the vertical rod 108 swings, the vertical rod 108 drives the horizontal rod 107 to swing, so that the movable hook lock 102 swings upwards, at the moment, the pressure spring 115 is compressed, when the roller 101 resets, the pressure spring 115 pushes the movable hook lock 102 to swing the movable hook lock 102 downwards, so that the movable hook lock 102 resets, and as the movable hook lock 102 swings in a vertical plane, even if the pressure spring 115 fails, the movable hook lock 102 can automatically reset due to the gravity of the pressure spring 115.
The bracket 104 is further provided with a stopping portion 109 for stopping the movable hook 102 when the movable hook 102 swings, the arm includes an upper arm 110 and a lower arm 111, the roller 101 is disposed on the upper arm 110, the vertical rod 108 is disposed on the lower arm 111, an upper connecting sleeve 112 on the upper arm 110 and a lower connecting sleeve 113 on the lower arm 111 are movably sleeved on the second hinge shaft 106, the upper connecting sleeve 112 and the lower connecting sleeve 113 are stacked up and down, a torsion spring 114 is disposed between the upper arm 110 and the lower arm 111 and sleeved on the upper connecting sleeve 112 and the lower connecting sleeve 113, two ends of the torsion spring 114 are respectively fixed with the upper arm 110 and the lower arm 111, after the movable hook 102 swings upward by a certain angle, the movable hook 102 is stopped by the stopping portion 109, it is avoided that the upward swing angle of the hook latch 102 is too large, and when the hook latch 102 is stopped by the stopper 109, although the lower arm 111 cannot swing continuously, the upper arm 110 can swing continuously against the torsion of the torsion spring 114, and when the torsion spring 114 is provided, the torsion spring 114 needs to have a certain pre-torsion, so that the bracket 104 is provided with the first stopper 106 for stopping the lower arm 111 and stopping the swing of the lower arm 111 due to the pre-torsion of the torsion spring 114, and the lower arm 111 is provided with the second stopper 117 for stopping the upper arm 110 and stopping the swing of the upper arm 110 due to the pre-torsion of the torsion spring 114, so that the torsion spring 114 can maintain the pre-torsion, and the pre-torsion of the torsion spring 114 is greater than the elastic force of the compression spring 115 when the hook 103 is located in the locking hole 201.
The above description is only about the preferred embodiment of the present invention, but it should not be understood as limiting the claims, and the present invention may be modified in other structures, not limited to the above structures. In general, all changes which come within the scope of the invention as defined by the independent claims are intended to be embraced therein.
Claims (2)
1. An elevator car door lock apparatus, characterized in that it comprises:
the door lock seat assembly is characterized in that the lock seat assembly (2) is fixed on a door machine bottom plate (3), and a strip-shaped lock hole (201) extending along the moving direction of a door machine hanging plate (4) relative to the door machine bottom plate (3) is formed in the lock seat assembly (2);
the hook lock assembly (1) is fixed on a gantry crane hanging plate (4), the hook lock assembly (1) comprises a roller (101) and a movable hook lock (102) driven by the roller (101), a hook part (103) is fixedly arranged on the movable hook lock (102), and when the hook part (103) is located in a lock hole (201), the hook part (103) can slide along the length direction of the lock hole (201) and is limited at the end part of the lock hole (201); and
the baffle plate assembly (5) is fixed on a hoistway door sill of each floor, the working surface on the baffle plate assembly (5) is arranged in the vertical direction, and the working surface on each baffle plate assembly (5) comprises two guide inclined surfaces (502) which are used for being in rolling fit with the roller (101) to enable the movable hook lock (102) to swing and a supporting surface (501) which is arranged between the two guide inclined surfaces (502) and is used for being in rolling fit with the roller (101) to enable the hook part (103) to be kept at a position separated from the lock hole (201);
when the roller (101) is not in contact with the baffle assembly (5) and is positioned on one side, close to the lock seat assembly (2), of the baffle assembly (5), the hook portion (103) is positioned in the lock hole (201), and when the roller (101) is not in contact with the baffle assembly (5) and is positioned on one side, far away from the lock seat assembly (2), of the baffle assembly (5), the hook portion (103) is separated from the lock hole (201);
the hook lock assembly (1) further comprises a support (104) and an arm piece, a first hinge shaft (105) in the horizontal direction and a second hinge shaft (106) in the vertical direction are arranged on the support (104), the movable hook lock (102) is hinged to the first hinge shaft (105), the arm piece is hinged to the second hinge shaft (106), a horizontal rod (107) is arranged on the movable hook lock (102), a vertical rod (108) is arranged on the arm piece, the side wall of the horizontal rod (107) abuts against the side wall of the vertical rod (108), the roller (101) is arranged in the horizontal direction and fixed on the arm piece, when the roller (101) swings to drive the arm piece to swing, the vertical rod (108) drives the movable hook lock (102) to swing through the horizontal rod (107) to enable the hook portion (103) to move upwards, the hook portion (103) is located at one end of the movable hook lock (102), and a pressure spring (115) for automatic resetting after the movable hook lock (102) swings is arranged between the other end of the movable hook lock (102) and the support (104).
2. The elevator car door lock apparatus according to claim 1, characterized in that:
the support (104) is further provided with a stopping portion (109) used for stopping the movable hook lock (102) when the movable hook lock (102) swings, each arm piece comprises an upper arm piece (110) and a lower arm piece (111), the roller (101) is arranged on the upper arm piece (110), the vertical rod (108) is arranged on the lower arm piece (111), an upper connecting sleeve (112) on the upper arm piece (110) and a lower connecting sleeve (113) on the lower arm piece (111) are movably sleeved on the second hinge shaft (106), the upper connecting sleeve (112) and the lower connecting sleeve (113) are vertically overlapped, a torsion spring (114) is located between the upper arm piece (110) and the lower arm piece (111) and sleeved on the upper connecting sleeve (112) and the lower connecting sleeve (113), and two ends of the torsion spring (114) are fixed with the upper arm piece (110) and the lower arm piece (111) respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510009334.XA CN104609286B (en) | 2015-01-09 | 2015-01-09 | Elevator car door lock device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510009334.XA CN104609286B (en) | 2015-01-09 | 2015-01-09 | Elevator car door lock device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104609286A CN104609286A (en) | 2015-05-13 |
| CN104609286B true CN104609286B (en) | 2023-04-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510009334.XA Active CN104609286B (en) | 2015-01-09 | 2015-01-09 | Elevator car door lock device |
Country Status (1)
| Country | Link |
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| CN (1) | CN104609286B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105314507A (en) * | 2015-10-27 | 2016-02-10 | 南通通洋机电制造有限公司 | Elevator car door locking device |
| CN107601241A (en) * | 2017-10-12 | 2018-01-19 | 梁润婵 | A kind of lift car door latch structure |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB220286A (en) * | 1923-08-08 | 1925-10-01 | Elevator Supplies Co Inc | Improvements in or relating to electric switches for elevator controller circuits |
| US5139112A (en) * | 1990-10-31 | 1992-08-18 | Otis Elevator Company | Elevator car door lock |
| CN1754819A (en) * | 2004-09-29 | 2006-04-05 | 株式会社日立制作所 | Elevator door device |
| CN203021148U (en) * | 2012-12-21 | 2013-06-26 | 宁波欣达电梯配件厂 | Asynchronous door knife device for elevator |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0734075Y2 (en) * | 1991-11-11 | 1995-08-02 | フジテック株式会社 | Manual unlocking device for elevator hall doors |
| EP0839753B1 (en) * | 1996-10-29 | 2003-09-24 | Inventio Ag | Device for opening and closing a car door and a hatchway door of an elevator |
| JP2010208727A (en) * | 2009-03-09 | 2010-09-24 | Toshiba Elevator Co Ltd | Interlocking device for elevator landing door |
| CN101549825A (en) * | 2009-05-05 | 2009-10-07 | 广东菱王电梯有限公司 | Elevator cage door lock |
| JP5611871B2 (en) * | 2011-03-16 | 2014-10-22 | 東芝エレベータ株式会社 | Elevator door engagement device |
| JP5908236B2 (en) * | 2011-08-31 | 2016-04-26 | 東芝エレベータ株式会社 | Elevator door equipment |
| JP5611997B2 (en) * | 2012-02-09 | 2014-10-22 | 東芝エレベータ株式会社 | Elevator door equipment |
| CN103803389B (en) * | 2012-11-14 | 2015-11-18 | 日立电梯（中国）有限公司 | Elevator door opening protecting apparatus |
| CN204607345U (en) * | 2015-01-09 | 2015-09-02 | 宁波欣达电梯配件厂 | Elevator car door locking device |
-
2015
- 2015-01-09 CN CN201510009334.XA patent/CN104609286B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB220286A (en) * | 1923-08-08 | 1925-10-01 | Elevator Supplies Co Inc | Improvements in or relating to electric switches for elevator controller circuits |
| US5139112A (en) * | 1990-10-31 | 1992-08-18 | Otis Elevator Company | Elevator car door lock |
| CN1754819A (en) * | 2004-09-29 | 2006-04-05 | 株式会社日立制作所 | Elevator door device |
| CN203021148U (en) * | 2012-12-21 | 2013-06-26 | 宁波欣达电梯配件厂 | Asynchronous door knife device for elevator |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104609286A (en) | 2015-05-13 |
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