CN113415704B - Elevator car door lock device and control method thereof - Google Patents

Abstract

The invention provides an elevator car door lock device and a control method thereof, wherein the device comprises a door knife bottom plate, a door knife arm assembly, a lock hook, a connecting rod assembly and a verification switch, wherein the verification switch comprises a switch contact and a switch socket; the connecting rod assembly is used for driving the door knife arm assembly to fold inwards under the action of external force and driving the hook end of the lock hook to rotate downwards, so that the switch contact is separated from the switch socket to realize unlocking, and is also used for driving the door knife arm assembly to open outwards, so that the hook end of the lock hook rotates upwards through the balancing weight, and the switch contact is contacted with the switch socket to realize locking. Compared with the prior art, the mechanical part and the electrical part of the elevator door lock can be verified at the same time, the reliability of the elevator door lock can be improved, the impact of the lock hook on the switch is reduced, and the switch door of the elevator is simplified and reliable through the linkage structure.

Description

Elevator car door lock device and control method thereof

Technical Field

The invention relates to an elevator accessory, in particular to an elevator car door lock device and a control method thereof.

Background

At present, the elevator is used as the most frequent vertical transportation means for modern people, not only solves the daily life demands of people, but also plays a very important role in promoting the development of human society, and the safety of the elevator has direct influence on the life and production of people.

In the traditional elevator car door lock device at present, most of car door lock mechanical parts and electric parts are separated, the safety of the elevator car door lock is ensured by the mechanical parts and the electric parts, the mechanical parts realize the door opening of a door system correspondingly, the electric parts mainly realize the control of a door lock loop, and according to the car door lock arranged by the conventional method, not only is an additional device required to be added, the car door lock structure is complicated, the maintenance difficulty and the elevator cost are increased, but also the mechanical safety and the electric safety cannot be ensured at the same time, the reliability of the car door lock is reduced, and the accident is difficult to avoid.

The traditional elevator car door lock switch socket is arranged in a positive mode, specifically, a power supply groove on the switch socket is upward, dust is easy to accumulate in a switch groove, and a traditional elevator car door lock latch hook is arranged downward, so that when a door is closed and locked, the latch hook impacts a switch greatly, and the switch is easy to damage.

When the elevator is opened and closed under various conditions, specifically, when the elevator car is in an unlocking area, the elevator door is opened and closed and when the elevator car is not in an unlocking area, the traditional elevator car door lock is realized through different modules, the structure is complex, the cost is high, and the safety of the elevator is reduced.

Disclosure of Invention

In order to overcome the defects in the prior art, the invention provides an elevator car door lock device and a control method thereof, and the specific technical scheme is as follows:

an elevator car door lock device comprising:

the door knife comprises a door knife bottom plate, a door knife arm assembly, a lock hook, a connecting rod assembly and a verification switch, wherein the door knife arm assembly and the lock hook are movably arranged on the door knife bottom plate;

the connecting rod assembly is arranged on the lock hook and is rotationally connected with the door knife arm assembly, the lock hook comprises a tail end and a hook end with an upward tip, and the tail end is provided with a balancing weight;

the connecting rod assembly is used for driving the door knife arm assembly to fold inwards under the action of external force and driving the hook end of the lock hook to rotate downwards, so that the switch contact is separated from the switch socket to realize unlocking, and is also used for driving the door knife arm assembly to open outwards, so that the hook end of the lock hook rotates upwards through the balancing weight, and the switch contact is contacted with the switch socket to realize locking.

In a specific embodiment, the door knife further comprises a starting block and a swing rod assembly, wherein the swing rod assembly is rotatably arranged on the door knife bottom plate and used for clamping the starting block;

the starting block is connected to the connecting rod assembly and used for pushing the connecting rod assembly to swing.

In a specific embodiment, the swing rod assembly comprises a swing rod and a swing rod spring, the swing rod is rotatably arranged on the door knife bottom plate, the swing rod is elastically connected to the door knife bottom plate through the swing rod spring, one end of the swing rod is provided with a limit bearing, and the other end of the swing rod is provided with a rolling bearing;

the limiting bearing is used for being clamped with the starting block, and the rolling bearing is used for contacting a curve plate on a bottom plate of an external door machine, so that the swing rod rotates and drives the limiting bearing to move on the starting block; the rolling bearing is also used for enabling the swing rod to rotate and driving the limit bearing to be clamped with the starting block through the downward movement of the swing rod spring to be separated from the curve plate.

In a specific embodiment, the linkage assembly includes a first linkage, a second linkage, a third linkage, and a rotating member;

the first end of the first connecting rod, the first end of the second connecting rod and the first end of the third connecting rod are coaxially sleeved on the rotating piece;

the second end of the first connecting rod is arranged on the lock hook, the second end of the second connecting rod is rotationally connected with the door knife arm assembly, the second end of the third connecting rod is rotationally connected with the starting block, and a linkage assembly is formed among the first connecting rod, the second connecting rod and the third connecting rod.

In a specific embodiment, the device further comprises an elastic component;

the elastic component is arranged on the door knife bottom plate and is elastically connected to the starting block, and the elastic component is used for providing elastic force for the starting block.

In a specific embodiment, the door knife arm assembly comprises a left door knife arm, a right door knife arm, a first connecting block and a second connecting block;

the middle part of the first connecting block is hinged with the door knife bottom plate, and the starting block is connected with the first connecting block through the connecting rod assembly so as to drive the first connecting block to rotate under the drive of external force;

the left door knife arm, the first connecting block, the right door knife arm and the second connecting block are sequentially hinged to form a parallelogram structure, so that the starting block can finally drive the left door knife arm and the right door knife arm to open outwards or clamp inwards.

In a specific embodiment, the door knife further comprises an emergency unlocking device, wherein the emergency unlocking device comprises an emergency unlocking plate and an emergency unlocking tension spring, the emergency unlocking plate is rotatably arranged on the door knife bottom plate, one end of the emergency unlocking tension spring is elastically connected with the emergency unlocking plate, and the other end of the emergency unlocking tension spring is connected with the door knife bottom plate;

the emergency unlocking plate is provided with a fixing part for fixing an external rescue rope, so that the rescue rope can drive the emergency unlocking plate to rotate clockwise and press down the hook end of the lock hook, and the emergency unlocking tension spring accumulates potential energy;

when the rescue rope is released, the emergency unlocking tension spring releases potential energy, so that the emergency unlocking plate rotates anticlockwise and is separated from the hook end of the lock hook.

A control method using the elevator car door lock device as described above, comprising the following specific operation steps:

when the lift car is in an unlocking area and receives a door opening instruction, the starting block drives the door knife arm assembly to retract inwards to clamp a landing door ball through the connecting rod assembly under the action of external force, the landing door lock is unlocked, and meanwhile, the hook end of the lock hook is enabled to rotate downwards through the connecting rod assembly, so that the switch contact is separated from the switch socket, unlocking is realized, and the lift car is normally opened;

when the lift car is in an unlocking area and receives a door closing instruction, the rolling bearing on the swinging rod is in contact with the curve plate on the bottom plate of the external door machine, so that the swinging rod rotates and drives the limit bearing to slide on the starting block, the starting block starts to rotate, meanwhile, the door knife arm assembly is driven to open outwards through the connecting rod assembly, the hook end of the lock hook rotates upwards under the action of the balancing weight to keep a locking state, the switch contact is in contact with the switch socket, locking is achieved, and the lift car is normally closed.

In a specific embodiment, when the car is in an unlocking area and the car is used for taking off the door from the car, the car door is moved to the door opening direction by external force until the right door knife arm contacts the landing ball, the right door knife arm moves outwards under the resistance of the landing ball, so that the first connecting block and the second connecting block rotate clockwise and drive the left door knife arm and the right door knife arm to rotate, then the connecting rod assembly drives the lock hook to rotate downwards, the car door lock hook is unlocked, and the switch contact is driven to be separated from the switch socket, and unlocking is realized;

when the elevator car is in an unlocking area and the elevator car is used for taking off the elevator car, firstly, the elevator car is unlocked by a triangular key, so that the elevator car moves towards the opening direction, the elevator car moves until the left elevator arm touches the elevator car, the left elevator arm moves outwards under the resistance of the elevator car, the first connecting block and the second connecting block rotate clockwise and drive the left elevator arm and the right elevator arm to rotate, and then the connecting rod assembly drives the lock hook to rotate downwards to unlock the elevator car lock hook and drive the switch contact to be separated from the switch socket, so that unlocking is realized.

In a specific embodiment, when the car is in a non-unlocking area and the motor opens the door by mistake, the motor acts to enable the synchronous belt to move in the door opening direction, the synchronous belt drives the starting block to rotate to enable the first connecting block to rotate anticlockwise, the left door knife arm and the right door knife arm continue to clamp inwards, the connecting rod assembly is not acted by the extrusion force from the upper right, at the moment, the connecting rod assembly is kept in a free state, and the locking hook is in a locking state and still keeps in a normal door closing locking state with the switch bracket integrated on the bottom plate of the door machine;

when the car is in a non-unlocking area and the door is taken off in the car, the motor synchronous belt does not act, the starting block and the linkage plate also keep motionless, the door hanging plate drives the door knife bottom plate to move towards the door opening direction during taking off the door, the whole car door lock device integrally moves towards the door opening direction until the lock hook hooks the switch fixing plate fixed on the door machine, the door knife arm assembly does not contact the landing door ball, the door knife arm assembly does not act, and the door hanging plate continues to move towards the door opening direction until the hook hooks the hook plate fixed on the door machine;

when the car is in a non-unlocking area, the landing door is unlocked by a triangular key firstly, so that the landing door moves to be completely opened in the opening direction, a rescue rope is manually pulled downwards at the moment, the rescue rope fixing part moves downwards to drive an emergency unlocking plate to rotate clockwise, after the emergency unlocking plate overcomes the tension of an emergency unlocking tension spring, the hook end of the locking hook rotates downwards, the unlocking of the car door is realized, then the car door is manually pulled out, after the rescue rope is released, the emergency unlocking tension spring releases pressure to enable the emergency unlocking plate to rotate anticlockwise, and the hook end of the locking hook automatically resets upwards through the gravity of the locking hook and the counterweight, so that the locking state is maintained.

Compared with the prior art, the invention has the following beneficial effects:

the elevator car door lock device and the control method thereof provided by the invention can ensure the locking of the mechanical part and the safety verification of the electric loop, ensure that the car door lock is simple in structure, convenient to install and debug, reduce the maintenance difficulty and the elevator cost, improve the reliability and safety of the car door lock, and enable the opening and closing door in various conditions to be simpler, more reliable and safer in a linkage opening and closing door mode.

In order to make the above objects, features and advantages of the present invention more comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a front view of a first structure of an elevator car door lock device in an embodiment;

fig. 2 is a first structural rear view of the elevator car door lock device in the embodiment;

fig. 3 is a front view showing a second structure of the car door lock device in the case of normal door opening in the embodiment;

fig. 4 is a front view of a third structure of the door lock device when the door is taken off outside the car in the unlocking area in the embodiment;

fig. 5 is a front view of a fourth configuration of the car door lock device when the motor is erroneously opened in the non-unlock region in the embodiment.

Description of main reference numerals:

1-a door knife bottom plate; 2-a tool arm assembly; 3-latch hooks; 4-a connecting rod assembly; 5-a start block; 6-verifying the switch; 7-a swing rod assembly; 8-an elastic component; 9-switch contacts; 10-a switch socket; 11-an arc chute; 12-limiting slotting; 13-a first link; 14-a second link; 15-a third link; 16-a rotating member; 17-swinging rod; 19-a pendulum rod spring; 20-limiting bearings; 21-a rolling bearing; 22-curve plate; 23-limiting grooves; 24-left door knife arm; 25-right door knife arm; 26-a first connection block; 27-a second connection block; 28-starting block tension springs; 29-supporting columns; 30-emergency unlocking sheets; 31-emergency unlocking tension spring.

Detailed Description

Examples

As shown in fig. 1 to 5, the present embodiment provides an elevator car door lock device including:

the door knife base plate 1, the door knife arm assembly 2, the lock hook 3, the connecting rod assembly 4, the starting block 5, the verification switch 6, the swing rod assembly 7 and the elastic assembly 8 are movably arranged on the door knife base plate 1, and the door knife arm assembly 2 and the lock hook 3 are movably arranged on the door knife base plate 1.

One end of the connecting rod assembly 4 is fixedly arranged on the lock hook 3 and is rotationally connected with the starting block 5 and the door knife arm assembly 2, and is used for driving the door knife arm assembly 2 to swing. The latch hook 3 includes a tail end and a hook end with an upward tip, and a balancing weight (not shown in the figure) is arranged on the tail end, and the balancing weight makes the weight of the tail end of the latch hook 3 be greater than that of the hook end of the latch hook 3, so as to drive the hook end of the latch hook 3 to rotate upwards when the door is closed, thereby ensuring that the switch contact 9 can contact the switch socket 10.

The verification switch 6 comprises a switch contact 9 and a switch socket 10, the switch contact 9 being arranged on the latch hook 3, the switch socket 10 being arranged on an external base above the latch hook 3.

Specifically, the latch hook 3 may rotate around the bottom plate 1 of the door knife, and a limiting rubber (not shown in the figure) is fixed at the lower left side, and the weight block makes the weight of the tail end of the latch hook 3 greater than the weight of the hook end of the latch hook 3, and keeps downward under the action of gravity. The hook end of the latch hook 3 is fixed with a switch contact 9, and forms electrical interlocking with a switch fixed on the bottom plate of the door machine. The hook end of the latch hook 3 keeps an upward state under the action of the tail end balancing weight, so that the switch contact 9 can contact the switch socket 10, and the locking state is kept.

The swing rod assembly 7 and the elastic assembly 8 are both arranged on the door knife bottom plate 1, the swing rod assembly 7 is clamped with the starting block 5, the starting block 5 is used for limiting the swing rod assembly 7, and the elastic assembly 8 is elastically connected to the starting block 5 and is used for providing elastic force for the starting block 5.

Specifically, the door knife bottom plate 1 is provided with an arc chute 11, the starting block 5 is movably arranged in the arc chute 11, and the swing rod assembly 7 is clamped with the starting block 5 and used for limiting the left-right swing of the starting block 5. The elastic component 8 is elastically connected to the starting block 5, and is used for providing elastic force for the starting block 5, so that the starting block 5 is constantly kept under force in the door opening direction.

The upper end of the door knife bottom plate 1 further comprises a limiting groove 12, one end of the starting block 5 is movably arranged in the limiting groove 12, and the limiting groove 12 is used for limiting the left-right swing of the starting block 5. The starting block 5 is provided with a limit ring (not shown in the figure) which keeps the starting block 5 always moving in a limit slot 12 arranged at the upper end of the door knife bottom plate 1.

The starting block 5 is rotatably arranged on the door knife bottom plate 1 and is also used for pushing the door knife arm assembly 2 to be folded inwards through the connecting rod assembly 4 when the lock hook 3 is unlocked and driving the lock hook 3 to rotate downwards so as to enable the switch contact 9 to be separated from the switch socket 10, so that unlocking is realized. The starting block 5 is also used for enabling the swing rod assembly 7 to move on the starting block 5 through the action of external force when the lock hook 3 is locked, enabling the starting block 5 to rotate, pushing the door knife arm assembly 2 to open outwards through the connecting rod assembly 4, and simultaneously driving the hook end of the lock hook 3 to rotate upwards through the action of the balancing weight at the tail end of the lock hook 3, enabling the switch contact 9 to contact the switch socket 10, and achieving locking.

Specifically, the actuating block 5, the latch hook 3, the swing link assembly 7 and the following emergency unlocking device are all located on the first surface of the door knife bottom plate 1, and the door knife arm assembly 2 is located on the second surface of the door knife bottom plate 1. From the rear view of the car door lock, i.e. from the first side of the door knife bottom plate 1, the swing rod assembly 7 is arranged above the left side of the connecting rod assembly 4 and is positioned at the left side of the starting block 5, and the connecting rod assembly 4 is positioned above the right side of the locking hook 3 and is positioned at the right side of the starting block 5. In this embodiment, all directions of up, down, left, right, etc. are seen from the rear view of the car door lock, that is, from the first surface of the door vane base plate 1.

Specifically, this embodiment enables mechanical part locking and electrical circuit safety verification and guarantees simultaneously, makes sedan-chair lock simple structure, and installation and debugging is convenient, reduces the cost of maintenance degree of difficulty and elevator, has improved the reliability and the security of sedan-chair lock, and the switch door of multiple condition becomes simpler, more reliable and safety through the switch door mode of linkage like this.

In this embodiment, the link assembly 4 includes a first link 13, a second link 14, a third link 15, and a rotating member 16, where the first end of the first link 13, the first end of the second link 14, and the first end of the third link 15 are coaxially sleeved on the rotating member 16.

Specifically, the first end of the first link 13 is sleeved at the first end of the rotating member 16, the first end of the third link 15 is sleeved at the second end of the rotating member 16, and the first end of the second link 14 is sleeved at the middle of the rotating member 16 and is located between the first link 13 and the third link 15.

The second end of the first connecting rod 13 is arranged on the lock hook 3, the second end of the second connecting rod 14 is rotatably connected with the door knife arm assembly 2, the second end of the third connecting rod 15 is rotatably connected with the starting block 5, and a linkage assembly is formed among the first connecting rod 13, the second connecting rod 14 and the third connecting rod 15.

In this embodiment, the swing link assembly 7 includes a swing link 17 and a swing link spring 19, the swing link 17 is rotatably disposed on the door knife bottom plate 1, the swing link 17 is elastically connected to the door knife bottom plate 1 through the swing link spring 19, one end of the swing link 17 is provided with a limit bearing 20, and the other end is provided with a rolling bearing 21.

The limiting bearing 20 is used for clamping the starting block 5, and the rolling bearing 21 is used for contacting a curve plate on the bottom plate of the external door machine, so that the swing rod 17 rotates and drives the limiting bearing 20 to move on the starting block 5; the rolling bearing 21 is also used for moving downwards to be separated from the curve plate through the swing rod spring 19, so that the swing rod 17 rotates and drives the limit bearing 20 to be clamped with the starting block 5. The limit bearing 20 is in contact with the start block 5 at all times.

In this embodiment, the starting block 5 includes a limiting groove 23, and the limiting groove 23 is used for accommodating a limiting bearing 20 on the swing rod 17 to limit the swing rod 17. The starting block 5 can rotate around the door knife bottom plate 1, the limiting groove 23 is located on the left side of the starting block 5, and the limiting groove 23 is preferably an arc groove. The starting block 5 further comprises a limiting curved surface, the limiting curved surface is positioned on the left side of the starting block 5 and is communicated with the limiting groove 23, the limiting bearing 20 is in contact with the limiting curved surface at any time, and when the swing rod 17 is separated from the limiting groove 23, the swing rod 17 moves on the limiting curved surface of the starting block 5.

In this embodiment, the door vane arm assembly 2 includes a left door vane arm 24, a right door vane arm 25, a first connecting block 26 and a second connecting block 27, the middle part of the first connecting block 26 is hinged to the door vane bottom plate 1, and the starting block 5 is connected to the first connecting block 26 through the connecting rod assembly 4, so as to drive the first connecting block 26 to rotate under the driving of an external force. The left door knife arm 24, the first connecting block 26, the right door knife arm 25 and the second connecting block 27 are sequentially hinged to form a parallelogram structure, so that the starting block 5 can drive the left door knife arm 24 and the right door knife arm 25 to be outwards opened or inwards clamped.

Specifically, the left and right door arms 24 and 25 can be opened or clamped outward by rotation of the first and second connection blocks 26 and 27.

Specifically, the starting block 5 is connected to the second end of the third connecting rod 15, the first end of the third connecting rod 15 is sleeved at the second end of the rotating member 16, the first end of the second connecting rod 14 is sleeved in the middle of the rotating member 16, the second end of the second connecting rod 14 is connected to the left door knife arm 24, and the starting block 5 can drive the left door knife arm 24 to move through the third connecting rod 15, the rotating member 16 and the second connecting rod 14 and drive the left door knife arm 24 and the right door knife arm 25 to open outwards or clamp inwards through a parallelogram structure formed among the left door knife arm 24, the first connecting block 26, the right door knife arm 25 and the second connecting block 27.

In this embodiment, the emergency unlocking device further comprises an emergency unlocking device, the emergency unlocking device comprises an emergency unlocking plate 30 and an emergency unlocking tension spring 31, the emergency unlocking plate 30 is rotatably arranged on the door knife bottom plate 1, one end of the emergency unlocking tension spring 31 is elastically connected to the emergency unlocking plate 30, and the other end of the emergency unlocking tension spring is connected to the door knife bottom plate 1.

The emergency unlocking plate 30 is provided with a fixing part for fixing an external rescue rope, so that the rescue rope can drive the emergency unlocking plate 30 to rotate clockwise and press down the hook end of the latch hook 3, and the emergency unlocking tension spring 31 accumulates potential energy. When the rescue rope is released, the emergency unlocking tension spring 31 releases potential energy, so that the emergency unlocking piece 30 rotates counterclockwise and is separated from the hook end of the latch hook 3. Specifically, the emergency unlocking plate 30 is transversely arranged on the bottom plate of the door knife, and the fixing part of the emergency unlocking plate 30 for fixing the external rescue rope can be a through hole or a pillar.

In this embodiment, the elastic component 8 includes a start block tension spring 28 and a support column 29, one end of the start block tension spring 28 is fixedly connected with the door knife bottom plate 1 through the support column 29, and the other end is fixedly connected with the start block 5, so as to provide elastic force for the start block 5, and drive the start block 5 to move along one end close to the support column 29, so that the start block 5 is constantly kept under stress in the door opening direction.

In this embodiment, the switch socket 10 includes a slot, the opening direction of the slot is downward, and the switch contact 9 includes a pin, and the pin is upward and is in plug-in fit with the slot.

When the elevator car is in an unlocking area and receives a door opening instruction, as shown in fig. 2-3, the starting block 5 drives the door knife arm assembly 2 to swing under the action of external force through the connecting rod assembly 4, so that the door knife arm assembly 2 is inwards folded to clamp a landing door ball, the landing door lock is unlocked, and meanwhile, the hook end of the lock hook 3 is downwards rotated through the connecting rod assembly 4, so that the switch contact 9 is separated from the switch socket 10, unlocking is realized, and the elevator car normally opens.

Specifically, when the car is in the unlocking area and receives a door opening instruction, a starting rod is arranged on the starting block 5, and the synchronous belt drives the starting rod to move through the output of the motor, so that the starting block 5 swings. The starting rod acts in the door opening direction under the action of an external motor, drives the left door knife arm 24 to swing through the third connecting rod 15, the rotating piece 16 and the second connecting rod 14, and drives the left door knife arm 24 and the right door knife arm 25 to retract inwards to clamp the landing door ball through a parallelogram structure formed among the left door knife arm 24, the first connecting block 26, the right door knife arm 25 and the second connecting block 27, so that the landing door lock is unlocked. Simultaneously, the first connecting rod 13 is pressed to the right and acts to enable the lock hook 3 to rotate, the hook end of the lock hook 3 rotates downwards, the car door lock hook 3 is unlocked, the switch contact 9 is separated from the switch socket 10, unlocking is achieved, and the car normally opens.

As shown in fig. 1, when the car is in the unlocking area and receives the door closing instruction, the rolling bearing 21 on the swinging rod 17 contacts the curve plate on the bottom plate of the external door machine, so that the swinging rod 17 rotates and drives the limiting bearing 20 to be separated from the limiting groove 23 on the starting block 5, the starting block 5 starts to rotate, meanwhile, the connecting rod assembly 4 drives the door knife arm assembly 2 to swing, so that the door knife arm assembly 2 is outwards opened, and meanwhile, the hook end of the lock hook 3 is driven to upwards rotate through the action of the balancing weight, so that the switch contact 9 contacts the switch socket 10, locking is realized, and the car is normally closed.

Specifically, when the car is in the unlocking area and receives a door closing instruction, the starting rod acts towards the door closing direction under the action of an external motor, the starting block 5 pushes the swinging rod 17 to rotate under the action of the external force, the rolling bearing 21 on the swinging rod 17 contacts the curve plate 22 on the bottom plate of the external door machine, the swinging rod 17 rotates, the limiting bearing 20 on the swinging rod 17 is separated from the limiting groove 23 on the starting block 5, the starting block 5 starts to rotate, the left door cutter arm 24 is driven to swing through the third connecting rod 15, the rotating piece 16 and the second connecting rod 14, and the left door cutter arm 24 and the right door cutter arm 25 are driven to open outwards through the parallelogram structure formed among the left door cutter arm 24, the first connecting block 26, the right door cutter arm 25 and the second connecting block 27, at the moment, the first connecting rod 13 is in a free state, the hook end of the locking hook 3 rotates upwards under the action of the balancing weight arranged at the tail end of the locking hook 3, the locking state is in a locking state, the switching contact 9 contacts the switching socket 10, and the normal door closing of the car is realized.

In this embodiment, as shown in fig. 2-3, when the car is in the unlocking area and the door is pulled out from the car, the car door is moved to the door opening direction by external force until the right door knife arm 25 contacts the landing door ball, the right door knife arm 25 moves outwards under the resistance of the landing door ball, so that the first connecting block 26 and the second connecting block 27 rotate clockwise and drive the left door knife arm 24 and the right door knife arm 25 to rotate, and then the connecting rod assembly 4 drives the latch hook 3 to rotate downwards, so as to unlatch the car door latch hook 3 and drive the switch contact 9 to separate from the switch socket 10, thereby realizing unlocking.

Specifically, when the car is in the unlocking area and the door is pulled out from the car, the car door is moved to the door opening direction by external force until the right door knife arm 25 touches the landing ball, the right door knife arm 25 moves outwards under the resistance of the landing ball, the first connecting block 26 and the second connecting block 27 rotate clockwise, the left door knife arm 24 and the right door knife arm 25 are driven to rotate, the first connecting rod 13 is subjected to extrusion force to the right upper side and acts by the action of the third connecting rod 15, the rotating piece 16 and the second connecting rod 14, the lock hook 3 is driven to rotate downwards, the car door lock hook 3 is unlocked, the switch contact 9 is driven to be separated from the switch socket 10, and unlocking is realized.

As shown in fig. 4, when the car is in the unlocking area and the door is pulled out of the car, the landing door is unlocked by the triangular key, so that the landing door moves in the door opening direction, the left door knife arm 24 contacts the landing ball, the left door knife arm 24 moves outwards under the resistance of the landing ball, the first connecting block 26 and the second connecting block 27 rotate clockwise, the left door knife arm 24 and the right door knife arm 25 are driven to rotate, the lock hook 3 is driven to rotate downwards by the connecting rod assembly 4, the car door lock hook 3 is unlocked, the switch contact 9 is driven to be separated from the switch socket 10, and unlocking is realized.

Specifically, under the action of the third connecting rod 15, the rotating piece 16 and the second connecting rod 14, the first connecting rod 13 is subjected to upward right extrusion force and acts, the latch hook 3 is driven to rotate downwards, the car door lock hook 3 is unlocked, and the switch contact 9 is driven to be separated from the switch socket 10, so that unlocking is realized.

In this embodiment, as shown in fig. 5, when the car is in the non-unlocking area and the motor is in the open state by mistake, the motor acts to move the synchronous belt in the open direction, the synchronous belt drives the start block 5 to rotate, so that the first connecting block 26 rotates anticlockwise, the left door knife arm 24 and the right door knife arm 25 continue to clamp inwards because no layer of door ball exists in the middle of the car, the connecting rod assembly 4 is not acted by the extrusion force in the upper right direction, the connecting rod assembly 4 is kept in a free state, the latch hook 3 is still in a locking state, the switch bracket integrated on the bottom plate of the door still keeps in a normal closed locking state, and the distance between the latch hook 3 and the hook plate in the normal closed state is less than 50mm, so that when the car door is in the open state by mistake, the open space meets the national standard requirement.

Specifically, the left and right door arms 24 and 25 continue to clamp inward, the first link 13 is not acted upon by the upward right pressing force, and at this time, the first link 13 remains in a free state, and the latch hook 3 remains in a locked state.

When the car is in a non-unlocking area and the door is taken off in the car, the motor synchronous belt does not act, the starting block 5 and the linkage plate also remain motionless, and when the door is taken off, the door hanging plate drives the door knife bottom plate 1 to move towards the opening direction, and the whole car door lock device wholly moves towards the opening direction until the lock hook 3 hooks the switch fixing plate fixed on the door machine. Because in the non-unlocking area, the door knife arm assembly 2 can not contact the landing door ball, so the door knife arm assembly 2 does not act, and the door hanging plate continues to move towards the door opening direction until the hook hooks the hook plate fixed on the door machine, and the door opening distance is less than 50mm, thereby meeting the national standard requirement.

When the car is in a non-unlocking area and the car is opened, the landing door is unlocked by a triangular key, so that the landing door moves to the opening direction until the landing door is completely opened. At this time, the rescue rope (not shown in the figure) is manually pulled down, the rescue rope fixing part moves down to drive the emergency unlocking plate 30 to rotate clockwise, the emergency unlocking pulling plate overcomes the pulling force of the emergency unlocking tension spring 31, then the locking hook 3 rotates, the hook end of the locking hook 3 rotates down, unlocking of the car door is achieved, and the car door is manually pulled open. After the rescue rope is released, the emergency unlocking tension spring 31 releases pressure to enable the emergency unlocking plate 30 to rotate anticlockwise, the lock hook 3 automatically resets through the gravity of the lock hook and the counterweight, and the hook end of the lock hook 3 rotates upwards to keep a locking state.

Compared with the prior art, the elevator car door lock device and the control method thereof provided by the embodiment can ensure that the mechanical part is locked and the safety verification of an electric loop is ensured, so that the car door lock is simple in structure, convenient to install and debug, low in maintenance difficulty and low in elevator cost, the reliability and safety of the car door lock are improved, and the door opening and closing modes of various conditions are simpler, more reliable and safer through the door opening and closing mode of linkage.

The switch socket has the advantages that the dust in the switch socket can be prevented from accumulating in a downward arrangement mode through the opening direction of the slot, the impact of the lock hook on the switch socket is reduced, the switch socket is prevented from being damaged by the lock hook, and the practicability of the device is further improved.

Those skilled in the art will appreciate that the drawing is merely a schematic illustration of a preferred implementation scenario and that the modules or flows in the drawing are not necessarily required to practice the invention.

Those skilled in the art will appreciate that modules in an apparatus in an implementation scenario may be distributed in an apparatus in an implementation scenario according to an implementation scenario description, or that corresponding changes may be located in one or more apparatuses different from the implementation scenario. The modules of the implementation scenario may be combined into one module, or may be further split into a plurality of sub-modules.

The above-mentioned inventive sequence numbers are merely for description and do not represent advantages or disadvantages of the implementation scenario.

The foregoing disclosure is merely illustrative of some embodiments of the invention, and the invention is not limited thereto, as modifications may be made by those skilled in the art without departing from the scope of the invention.

Claims (6)

1. An elevator car door lock device, comprising:

the door knife comprises a door knife bottom plate, a door knife arm assembly, a lock hook, a connecting rod assembly and a verification switch, wherein the door knife arm assembly and the lock hook are movably arranged on the door knife bottom plate;

the connecting rod assembly is arranged on the lock hook and is rotationally connected with the door knife arm assembly, the lock hook comprises a tail end and a hook end with an upward tip, and the tail end is provided with a balancing weight;

the connecting rod assembly is used for driving the door knife arm assembly to be folded inwards under the action of external force and driving the hook end of the lock hook to rotate downwards so as to enable the switch contact to be separated from the switch socket to realize unlocking, and is also used for driving the door knife arm assembly to be unfolded outwards so as to enable the hook end of the lock hook to rotate upwards through the balancing weight so as to enable the switch contact to be contacted with the switch socket to realize locking;

the door knife comprises a door knife bottom plate, a door knife seat and a door knife seat, wherein the door knife seat is arranged on the door knife seat;

the starting block is connected with the connecting rod assembly and used for pushing the connecting rod assembly to swing;

the swing rod assembly comprises a swing rod and a swing rod spring, the swing rod is rotatably arranged on the door knife bottom plate, the swing rod is elastically connected to the door knife bottom plate through the swing rod spring, one end of the swing rod is provided with a limit bearing, and the other end of the swing rod is provided with a rolling bearing;

the limiting bearing is used for being clamped with the starting block, and the rolling bearing is used for contacting a curve plate on a bottom plate of an external door machine, so that the swing rod rotates and drives the limiting bearing to move on the starting block; the rolling bearing is also used for enabling the swing rod to rotate and driving the limit bearing to be clamped with the starting block through the downward movement of the swing rod spring to be separated from the curve plate;

the connecting rod assembly comprises a first connecting rod, a second connecting rod, a third connecting rod and a rotating piece;

the first end of the first connecting rod, the first end of the second connecting rod and the first end of the third connecting rod are coaxially sleeved on the rotating piece;

the second end of the first connecting rod is arranged on the lock hook, the second end of the second connecting rod is rotationally connected with the door knife arm assembly, the second end of the third connecting rod is rotationally connected with the starting block, and a linkage assembly is formed among the first connecting rod, the second connecting rod and the third connecting rod;

also comprises an elastic component;

the elastic component is arranged on the door knife bottom plate and is elastically connected to the starting block, and the elastic component is used for providing elastic force for the starting block.

2. The elevator car door lock device according to claim 1, wherein:

the door knife arm assembly comprises a left door knife arm, a right door knife arm, a first connecting block and a second connecting block;

the middle part of the first connecting block is hinged with the door knife bottom plate, and the starting block is connected with the first connecting block through the connecting rod assembly so as to drive the first connecting block to rotate under the drive of external force;

the left door knife arm, the first connecting block, the right door knife arm and the second connecting block are sequentially hinged to form a parallelogram structure, so that the starting block can finally drive the left door knife arm and the right door knife arm to open outwards or clamp inwards.

3. The elevator car door lock device according to claim 1, wherein:

the emergency unlocking device comprises an emergency unlocking plate and an emergency unlocking tension spring, the emergency unlocking plate is rotatably arranged on the door knife bottom plate, one end of the emergency unlocking tension spring is elastically connected with the emergency unlocking plate, and the other end of the emergency unlocking tension spring is connected with the door knife bottom plate;

the emergency unlocking plate is provided with a fixing part for fixing an external rescue rope, so that the rescue rope can drive the emergency unlocking plate to rotate clockwise and press down the hook end of the lock hook, and the emergency unlocking tension spring accumulates potential energy;

when the rescue rope is released, the emergency unlocking tension spring releases potential energy, so that the emergency unlocking plate rotates anticlockwise and is separated from the hook end of the lock hook.

4. A control method using the elevator car door lock device according to any one of the preceding claims 1-3, characterized in that:

when the lift car is in an unlocking area and receives a door opening instruction, the starting block drives the door knife arm assembly to retract inwards to clamp a landing door ball under the action of external force, the landing door lock is unlocked, and meanwhile, the hook end of the lock hook is enabled to rotate downwards through the connecting rod assembly, so that the switch contact is separated from the switch socket, unlocking is realized, and the lift car normally opens the door;

when the lift car is in an unlocking area and receives a door closing instruction, a rolling bearing on a swinging rod contacts a curve plate on a bottom plate of an external door machine, so that the swinging rod rotates and drives a limit bearing to slide on a starting block, the starting block starts to rotate, meanwhile, a door knife arm assembly is driven to open outwards through a connecting rod assembly, and the hook end of a lock hook rotates upwards under the action of a balancing weight to keep a locking state, so that a switch contact contacts a switch socket to realize locking, and the lift car is normally closed.

5. The control method of the elevator car door lock device according to claim 4, characterized by:

when the lift car is in an unlocking area and the door is pulled out from the lift car, the lift car door is moved to the door opening direction by external force until a right door knife arm touches the landing ball, the right door knife arm moves outwards under the resistance of the landing ball, so that the first connecting block and the second connecting block rotate clockwise and drive the left door knife arm and the right door knife arm to rotate, then the connecting rod assembly drives the lock hook to rotate downwards, the lift car door lock hook is unlocked, and the switch contact is driven to be separated from the switch socket, and unlocking is realized;

when the elevator car is in an unlocking area and the elevator car is used for taking off the elevator car, firstly, the elevator car is unlocked by a triangular key, so that the elevator car moves towards the opening direction, the elevator car moves until the left elevator arm touches the elevator car, the left elevator arm moves outwards under the resistance of the elevator car, the first connecting block and the second connecting block rotate clockwise and drive the left elevator arm and the right elevator arm to rotate, and then the connecting rod assembly drives the lock hook to rotate downwards to unlock the elevator car lock hook and drive the switch contact to be separated from the switch socket, so that unlocking is realized.

6. The control method of the elevator car door lock device according to claim 5, characterized by:

when the car is in a non-unlocking area and the motor opens the door by mistake, the motor acts to enable the synchronous belt to move in the door opening direction, the synchronous belt drives the starting block to rotate to enable the first connecting block to rotate anticlockwise, the left door knife arm and the right door knife arm continue to clamp inwards, the connecting rod assembly is not acted by the extrusion force to the upper right, at the moment, the connecting rod assembly keeps a free state, the lock hook is in a locking state, and the lock hook and a switch bracket integrated on a bottom plate of the door machine still keep a normal door closing locking state;

when the car is in a non-unlocking area and the door is taken off in the car, the motor synchronous belt does not act, the starting block and the linkage plate also keep motionless, the door hanging plate drives the door knife bottom plate to move towards the door opening direction during taking off the door, the whole car door lock device integrally moves towards the door opening direction until the lock hook hooks the switch fixing plate fixed on the door machine, the door knife arm assembly does not contact the landing door ball, the door knife arm assembly does not act, and the door hanging plate continues to move towards the door opening direction until the lock hook hooks the hook plate fixed on the door machine;

when the car is in a non-unlocking area, the landing door is unlocked by a triangular key firstly, so that the landing door moves to be completely opened in the opening direction, a rescue rope is manually pulled downwards at the moment, the rescue rope fixing part moves downwards to drive an emergency unlocking plate to rotate clockwise, after the emergency unlocking plate overcomes the tension of an emergency unlocking tension spring, the hook end of the locking hook rotates downwards, the unlocking of the car door is realized, then the car door is manually pulled out, after the rescue rope is released, the emergency unlocking tension spring releases pressure to enable the emergency unlocking plate to rotate anticlockwise, and the hook end of the locking hook automatically resets upwards through the gravity of the locking hook and the counterweight, so that the locking state is maintained.

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