Elevator car door lock device

Abstract

The utility model discloses an elevator car door lock device which comprises a car door lock plate, a car lock plate, a first lock rod, a lock hook, a locking component and a first unlocking component. The first lock rod is clamped with the lock hook through the locking component, the locking function of the elevator car door is achieved, the car door is prevented from being opened by mistake when an elevator is in a non-flat-layer area, and the safety of passengers is guaranteed. The first unlocking component can achieve unlocking operation from the interior of the lift car through the structures such as the first lock cylinder and the first cam under the emergency condition. The device further comprises a second lock rod and a second unlocking part, and the emergency rescue function of unlocking from the outside of the lift car is provided. The touch switch is used for monitoring the locking state of the car door, and the elevator is prevented from running when the door is not locked. The baffle is used for preventing mechanical interference between the first lock rod and the second lock rod, and normal operation of the device is ensured. The device has the advantages of being simple in structure, convenient to operate, reliable in emergency unlocking and the like, and the operation safety and the emergency response capacity of the elevator are remarkably improved.

Description

Technical Field

[0001] The utility model relates to the field of elevator safety equipment, and particularly relates to an elevator car door lock device. Background Art

[0002] According to statistics, among the accidents caused by mechanical and electrical failures of elevators themselves, the door system accounts for the largest proportion. If an elevator fails and the car stops outside the unlocking area, passengers inside the car may blindly try to pry open the door to save themselves in panic, risking falling into the elevator shaft or suffering a shearing accident.

[0003] In order to effectively reduce such elevator accidents and prevent passengers from prying open the car door, in July 2015, the National Standardization Administration Committee approved the First Amendment to GB7588—2003 "Safety Rules for the Construction and Installation of Lifts". In June 2017, the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China approved the Second Amendment to TSGT7001—2009 "Rules for the Supervision and Periodic Inspection of Lifts—Traction and Forced Drive Lifts" to be synchronously modified with GB7588—2003, adding Item 6.11 "Car Door Opening Restriction Device and Opening of Car Door" in Annex A, which has been implemented since October 1, 2017. After installing the car door lock on the elevator, it can effectively avoid casualties and shearing accidents caused by elevator passengers prying open the door and falling into the shaft. When passengers are trapped, rescue personnel usually need to break open the car door, which not only increases the rescue time but also easily causes accidental injuries to passengers during the breaking process, threatening the safety of elevator passengers.

[0004] Therefore, there is an urgent need to design a car door lock device that can be opened from the inside of the car when the car is in the leveling area to enable passengers inside the car to escape in time. Summary of the Utility Model

[0005] The purpose of the utility model is to provide an elevator car door lock device, which can ensure the safety of the elevator door system while allowing internal unlocking operations in case of emergency, thereby improving the overall safety and emergency response ability of the elevator.

[0006] The technical solution adopted by the utility model to solve the above problems is: an elevator car door lock device, including a car door lock plate and a car lock plate. The car door lock plate is arranged on the car door, and a first lock rod is rotatably arranged thereon. The car lock plate is arranged on the car, and a lock hook that is tightly matched with the lock rod is arranged thereon. A locking component for driving the first lock rod to be locked in the lock hook after being inserted is arranged on the car door lock plate, and a first unlocking component for driving the first lock rod to rotate and disengage from the lock hook is also arranged on the car door lock plate.

[0007] Preferably: the first unlocking component includes a first lock core slidably arranged on the car door, a first return spring is arranged on the outer side of the first lock core, and the first lock core is plugged and adapted with a first key, and a first cam is arranged at one end of the first lock core for driving the first lock rod to rotate.

[0008] Preferably, the car door lock plate is rotatably provided with a second lock rod, a web rod is connected and fixed between the second lock rod and the first lock rod, and a second unlocking component for driving the second lock rod to swing is provided at one end of the second lock rod.

[0009] Preferably, the first locking rod is L-shaped, with a locking head matched with the locking hook at one end and an extension portion at the other end, the extension portion being in contact with the first cam after being pushed and slid out by the first key.

[0010] Preferably, a touch switch is arranged on the car door lock plate, and the touch switch contacts the lower surface of the lock head.

[0011] Preferably, the car lock plate is rotatably provided with a lever and is provided with a driving component for driving the lever to rotate, the first lock rod is provided with a groove, and the end of the lever slides in the groove and contacts therewith.

[0012] Preferably: a baffle is provided between the first locking rod and the second locking rod.

[0013] Compared with the prior art, the utility model has the following advantages and effects:

[0014] The utility model ensures that passengers cannot open the car door from inside the car when the elevator is in a non-level area by setting a snap-fit design between the first locking rod and the lock hook, effectively preventing safety accidents caused by passenger misoperation. Through the cooperation of the locking component and the unlocking component, the device provides the function of unlocking from inside the car in an emergency, reducing the rescue operation of rescue personnel and allowing passengers to escape quickly when the elevator stays in the level area. At the same time, the device realizes two-way emergency unlocking inside and outside the car through a double unlocking design, improves rescue efficiency, and reduces secondary injuries that may be caused by breaking the car door. The design of the touch switch ensures real-time monitoring of the locking state of the car door, effectively preventing the elevator from running when it is not locked, and further improving the safety performance of the elevator. By setting a baffle between the first locking rod and the second locking rod, the independent operation of the first locking rod and the second locking rod is guaranteed, mechanical interference is prevented, and the reliability and stability of the entire device are improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The utility model is a structural schematic diagram of an elevator car door locking device according to an embodiment of the present utility model.

[0016] Figure 2 It is a schematic structural diagram of the first unlocking component of an embodiment of the utility model.

[0017] Figure 3 This is a schematic structural diagram of the second unlocking component in an embodiment of the present utility model.

[0018] Reference numerals in the drawings: car lock plate 11, car body lock plate 12, first lock rod 13, lock hook 14, locking component 15, first unlocking component 16, lever 17, driving component 18, groove 19, first lock core 21, first return spring 22, first key 23, first cam 24, second lock rod 31, web bar 32, second unlocking component 33, second lock core 41, second return spring 42, second key 43, second cam 44, lock head 51, extension part 52, touch switch 53, baffle 54. Specific embodiments

[0019] The present utility model will be further described in detail below with reference to the accompanying drawings and through embodiments. The following embodiments are explanations of the present utility model, and the present utility model is not limited to the following embodiments.

[0020] Embodiment: Refer to Figure 1 - Figure 3 , in this embodiment, an elevator car door lock device is involved, which is specifically used to improve the safety during the operation of the elevator, especially to prevent passengers from accidentally opening the car door when the elevator stops in a non-leveling area and avoid the dangerous situation of falling into the elevator shaft. The device also provides the function of unlocking the car door from the inside in case of emergency, so as to facilitate rescue personnel to implement rescue in special situations. Specifically, it includes: a car lock plate 11 and a car body lock plate 12. The car lock plate 11 is installed on the car door, and a first lock rod 13 is rotatably arranged thereon. The car body lock plate 12 is installed on the car body, and a lock hook 14 that is tightly matched with the first lock rod 13 is arranged thereon. The device is also provided with a locking component 15 for driving the first lock rod 13 to be locked after being inserted into the lock hook 14. When the elevator is in a non-leveling area, the first lock rod 13 is driven by the locking component 15 to engage with the lock hook 14 to ensure that the car door cannot be opened, thereby ensuring the safety of passengers.

[0021] In addition, the device also includes a first unlocking component 16 for driving the first lock rod 13 to disengage from the lock hook 14. The unlocking component is mainly used in case of emergency. When the elevator stops in the leveling area, it allows the passengers to unlock through the first lock core 21 and lock operation from the inside of the car, driving the first lock rod 13 to rotate and disengage from the lock hook 14, so as to open the car door. During the on-site rescue process of the rescue personnel, the steps of breaking open the car door from the outside are reduced, which not only improves the rescue efficiency but also avoids the situation of accidentally injuring the passengers when breaking open the car door, ensuring that the passengers can leave the elevator quickly and safely.

[0022] The car door lock plate 11 is rotatably provided with a lever 17 and is installed with a driving component 18 for driving the lever 17 to rotate. The first lock rod 13 is provided with a groove 19, and the end of the lever 17 slides in the groove 19 and contacts therewith. The driving component 18 in this embodiment adopts a driving motor or the elevator car door machine through gear transmission to realize the swing of the lever 17, so that the elevator can realize the opening and closing of the car door through the driving component 18 when the elevator is in the leveling area.

[0023] In this embodiment, the first unlocking component 16 includes a first lock core 21 slidably disposed on the car door, a first return spring 22 is disposed on the outer side of the first lock core 21, and the first lock core 21 is plugged with a first key 23, and one end of the first lock core 21 is provided with a first cam 24 for driving the first lock rod 13 to rotate. Specifically, the first key 23 is disposed in a hidden cavity of the car door, and the cavity is sealed by a cover plate. When the elevator fails, the cover plate can be removed, the key can be taken out and inserted into the first lock core 21 and pushed, so that one side of the first cam 24 contacts one side of the first lock rod 13, and then the first key 23 is rotated to drive the first lock core 21 to drive the first cam 24 to swing, and push the first lock rod 13 to swing away from the lock hook 14 to achieve unlocking, and at the same time, it can call for help from the outside through the cavity, which is convenient for rescue personnel to carry out rescue.

[0024] The locking component 15 in this embodiment can be a spring. When the car door is closed, the tension of the spring realizes the cooperation between the first locking rod 13 and the locking hook 14 to lock the car door. In daily operation, the elevator can ensure that passengers cannot open the car door at will, and at the same time, it also provides a self-rescue method in an emergency, which significantly improves the safety performance of the elevator in use.

[0025] In this embodiment, the car door lock plate 11 is rotatably provided with a second lock rod 31, a web rod 32 is connected and fixed between the second lock rod 31 and the first lock rod 13, and a second unlocking component 33 driving the second lock rod 31 to swing is provided at one end thereof, and the second unlocking component 33 in this embodiment is the same as the first unlocking component 16, specifically, comprising a second lock core 41 slidably provided on the car door, a second return spring 42 is provided on the outer side of the second lock core 41, and the second lock core 41 is plugged and adapted with a second key 43, and second cams 44 for driving the second lock rod 31 to rotate are provided at both ends of the second lock core 41, and the working principle is also the same as the first unlocking component 16. By providing the second unlocking component 33, when the car door structure is intact, rescue personnel can open the car door from the outside of the car, without consuming energy to break the car door, and also reducing the safety risks caused by breaking.

[0026] In this embodiment, the first locking rod 13 is L-shaped, with a lock head 51 adapted to the lock hook 14 provided at one end and an extension 52 provided at the other end. The extension 52 is in contact with the first cam 24 after being pushed and slid out by the first key 23. The first return spring 22 is used for the reset of the first lock core 21. After the first lock core 21 is reset, the first cam 24 thereon disengages from the side of the extension 52 of the first locking rod 13, so that when the elevator is operating normally, the normal opening and closing of the car door is not interfered with when the first locking member 15 is not enabled, and the same applies to the second unlocking member 33.

[0027] A touch switch 53 is provided on the car door lock plate 11. The touch switch 53 is in contact with the lower surface of the lock head 51. The touch switch 53 is used to monitor the locking state of the car door in real time and is linked with other safety systems. Specifically, when the lock head 51 disengages from the lock hook 14 and is not locked, the lower surface of the lock head 51 will touch the touch switch 53, and the elevator control system receives the unlocked signal, thereby stopping the elevator operation or issuing an alarm to prevent the elevator from continuing to operate when the car door is not locked, and thus avoiding potential safety accidents.

[0028] A baffle 54 is provided between the first locking rod 13 and the second locking rod 31. The design of the baffle 54 can effectively prevent mechanical interference between the first locking rod 13 and the second locking rod 31, ensuring that they operate independently during normal operation. When the first locking rod 13 engages or disengages with the lock hook 14, the baffle 54 can isolate the first locking rod 13 and the second locking rod 31 to maintain a definite movement trajectory, improving the operation reliability of the device.

[0029] The above content described in this specification is only an example of the present invention. Those skilled in the technical field to which the present invention pertains can make various modifications or supplements to the described specific embodiments or use similar methods for substitution, as long as they do not deviate from the content of this specification of the present invention or exceed the scope defined by this claim book, they should fall within the protection scope of the present invention.

Claims

1. An elevator car door lock device, characterized in that, It includes a car door lock plate and a car lock plate. The car door lock plate is arranged on the car door and has a first locking rod rotatably arranged thereon. The car lock plate is arranged on the car and has a locking hook which is locked with the locking rod. The car door lock plate is provided with a locking component for driving the first locking rod to be locked after being engaged with the locking hook. It also includes a first unlocking component arranged on the car door lock plate and used to drive the first locking rod to rotate and disengage from the locking hook.

2. The elevator car door lock device according to claim 1, characterized in that: The first unlocking component includes a first lock core slidably arranged on the car door, a first return spring is arranged on the outer side of the first lock core, and the first lock core is plugged and adapted with a first key, and a first cam for driving the first lock rod to rotate is arranged at one end of the first lock core.

3. The elevator car door lock device according to claim 2, characterized in that: The car door lock plate is rotatably provided with a second lock rod, a web rod is connected and fixed between the second lock rod and the first lock rod, and one end of the second lock rod is provided with a second unlocking component that drives the second lock rod to swing.

4. A lift car door lock device according to claim 1, characterized in that: The first locking rod is L-shaped, with a locking head matched with the lock hook at one end and an extension portion at the other end, which contacts the first cam after being pushed and slid out by the first key.

5. The elevator car door lock device according to claim 4, characterized in that: The car door lock plate is provided with a touch switch, which contacts the lower surface of the lock head.

6. The elevator car door lock device according to claim 1, characterized in that: The car lock plate is rotatably provided with a lever and is installed with a driving component for driving the lever to rotate. The first lock rod is provided with a groove, and the end of the lever slides in the groove and contacts with the groove.

7. The elevator car door lock device according to claim 3, characterized in that: A baffle is arranged between the first locking rod and the second locking rod.

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