Elevator door lock device and control method thereof

Abstract

The present invention provides an elevator car door lock device and a control method thereof, the device comprises a door knife bottom plate, a starting rod, a door knife arm assembly, a lock hook assembly, a crank swing assembly and a verification switch, the lock hook assembly comprises a lock hook and an elastic mechanism, the crank swing assembly comprises a rotating member, a lock hook unlocking shaft, and a first connecting member, the verification switch comprises a switch contact and a switch socket, the starting rod is used to push the door knife arm assembly to move when the lock hook is unlocked, so that the door knife arm assembly touches the lock hook unlocking shaft and drives the rotating member to rotate, so that when the rotating member rotates, the lock hook is driven to rotate downward through the first connecting member to achieve unlocking, and when the door knife arm assembly is disengaged from the lock hook unlocking shaft, the elastic mechanism releases potential energy, so that the lock hook rotates upward to reset and achieve locking. Compared with the prior art, the mechanical part and the electrical part of the present invention are verified at the same time, the reliability of the car door lock is improved, the impact of the lock hook on the switch is further reduced, and the opening and closing door of the elevator is simplified and more reliable through the linkage structure.

Description

Technical Field

[0001] The invention relates to an elevator accessory, in particular to an elevator door lock device and a control method thereof. Background Art

[0002] At present, in the traditional elevator car door lock device, most of the car door lock mechanical part and electrical part are operated separately. The safety of the elevator car door lock is guaranteed by the mechanical and electrical parts. The mechanical part realizes the door opening response of the door system, and the electrical part mainly realizes the control of the door lock circuit. The car door lock set by this conventional method not only needs to add additional additional devices, making the car door lock structure complicated, increasing the difficulty of maintenance and the cost of the elevator, but also the mechanical and electrical safety cannot be guaranteed at the same time, which reduces the reliability of the car door lock and makes it difficult to avoid accidents.

[0003] The traditional elevator car door lock switch socket is set upright. Specifically, the power groove on the switch socket is upward, so dust is easily accumulated in the switch groove. In addition, the traditional elevator car door lock hook is set downward. When the door is closed and locked, the lock hook has a large impact on the switch, which can easily damage the switch.

[0004] When the elevator door is opened and closed in various situations, specifically, when the car is in the unlocking area and when the car is in the unlocking area, the traditional elevator door lock needs to be implemented through different modules, which has a complex structure and high cost, reducing the safety of the elevator. Summary of the invention

[0005] In order to overcome the shortcomings of the prior art, the present invention provides an elevator door lock device and a control method thereof, and the specific technical solution is as follows:

[0006] An elevator car door lock device comprises a door knife bottom plate, a starter rod, a door knife arm assembly, a lock hook assembly, a crank swing assembly and a verification switch, wherein the door knife arm assembly is arranged on the door knife bottom plate;

[0007] The lock hook assembly comprises a lock hook and an elastic mechanism, wherein the lock hook is rotatably arranged on the door knife bottom plate, a first end of the elastic mechanism is arranged on the lock hook, and a second end of the elastic mechanism is arranged on the door knife bottom plate;

[0008] The crank swing assembly includes a rotating member, a lock hook unlocking shaft, and a first connecting member, wherein the first end of the rotating member is rotatably arranged on the door knife bottom plate, the lock hook unlocking shaft is arranged on the second end of the rotating member, the first end of the first connecting member is rotatably arranged on the rotating member, and the second end of the first connecting member is rotatably arranged on the lock hook;

[0009] The verification switch includes a switch contact and a switch socket, wherein the switch contact is arranged on the lock hook, and the switch socket is arranged on an external base located above the lock hook;

[0010] The starter rod is arranged on the door knife arm assembly, and the starter rod is used to push the door knife arm assembly to move when the lock hook is unlocked, so that the door knife arm assembly touches the lock hook unlocking shaft and drives the rotating member to rotate, and then when the rotating member rotates, the lock hook is driven to rotate downward through the first connecting member to achieve unlocking, and the lock hook drives the switch contact to disengage from the switch socket, and the elastic mechanism is used to accumulate potential energy when the lock hook rotates downward;

[0011] The starting rod is also used to push the door knife arm assembly to move when the lock hook is locked, so that the door knife arm assembly is disengaged from the lock hook unlocking shaft, and then the elastic mechanism releases potential energy, so that the lock hook rotates upward and resets to achieve locking, and the lock hook drives the switch contact to contact the switch socket.

[0012] In a specific embodiment, the rotating member includes a door knife arm limiting shaft for pushing the door knife arm assembly to unlock, the lock hook unlocking shaft is provided with a billiard ball, the first end of the first connecting member is rotatably arranged on the rotating member through the door knife arm limiting shaft, and the second end of the first connecting member is rotatably arranged on the lock hook through a hinge shaft.

[0013] It should be noted that the configuration method using an articulated shaft is only a preferred configuration method of the present invention, and there are other preferred configuration methods, such as a lead screw, a locating pin, a bearing, and the like.

[0014] Preferably, the switch socket comprises a slot, the opening direction of the slot faces downward, and the switch contact comprises a pin, which is plugged into and fits with the slot.

[0015] In a specific embodiment, the elastic mechanism includes a support rod, a spring, a baffle cover assembly, a base, and a second connecting member. The base is arranged on the door knife bottom plate, the support rod is movably passed through the base, the spring and the baffle cover assembly are passed through the support rod, and the baffle cover assembly stops the end of the spring, the first end of the second connecting member is rotatably connected to the lock hook, and the second end of the second connecting member is connected to the support rod.

[0016] Preferably, the elastic mechanism includes at least one baffle cover assembly, the baffle cover assembly includes a through hole, one end of the base is provided with a through hole, the first end of the spring is fixed to the first end of the baffle cover assembly and is arranged on the base, the second end of the spring is arranged on the second end of the baffle cover assembly, the through hole on the baffle cover assembly is coaxial with the spring and the through hole on the base, and the support rod passes through the through hole on the base, the through hole on the baffle cover compression spring and the spring in sequence from top to bottom.

[0017] In a specific embodiment, the door knife arm assembly includes a left door knife arm, a right door knife arm, a first connecting block, a second connecting block, a transition plate, a first swing block, and a second swing block. The middle part of the first connecting block is hinged to the door knife base plate. The starting rod is connected to the first connecting block to drive the first connecting block to rotate under external force. The right door knife arm, the first connecting block, the transition plate, and the second connecting block are hinged in sequence to form a first parallelogram structure. The first swing block, the transition plate, the second swing block, and the left door knife arm are hinged in sequence to form a second parallelogram structure, so that the starting rod can eventually drive the first swing block to move, and then the first swing block can touch the billiard ball on the lock hook unlocking shaft to rotate the rotating part.

[0018] In a specific embodiment, the first connecting block and the second connecting block are respectively connected to the door knife base plate through rolling bearings, the upper and lower ends of the right door knife arm are respectively connected to the first ends of the first connecting block and the second connecting block through rolling bearings, the upper and lower ends of the transition plate are respectively connected to the second ends of the first connecting block and the second connecting block through rolling bearings, the other positions of the upper and lower ends of the transition plate are respectively connected to the first end of the first swing block and the lower movable link block through hinge shafts, and the upper and lower ends of the left door knife arm are respectively connected to the second ends of the first swing block and the second swing block through hinge shafts.

[0019] Preferably, the door knife base plate includes a plurality of slide grooves, and a billiard shaft is installed at the lower end of the first connecting block. The billiard shaft can move freely in the slide grooves of the door knife base plate, and the billiard shaft is used to cooperate with the impact bow at the center position of the door machine.

[0020] In a specific embodiment, the elevator car door lock device also includes a starting block and a starting block tension spring, the first end of the starting block is rotatably arranged on the door knife base plate, the first end of the starting block tension spring is connected to the second end of the starting block, the second end of the starting block tension spring is connected to the door knife base plate, the first end of the starting rod is arranged on the first connecting block, the second end of the starting rod is connected to the synchronous belt driving the car door switch, the starting rod is used to rotate the first connecting block under the drive of the synchronous belt of the car door switch, and the starting tension spring is used to drive the starting block to rotate.

[0021] Preferably, the first end of the starting block is rotatably arranged on the door knife base plate through a hinge shaft, the second end end of the starting block includes a circular hole and an arc groove, the first end of the starting block tension spring is fixedly connected to the starting block through the circular hole, the starting rod includes a plurality of rolling bearings, the starting rod is used to drive the first connecting block to rotate, the starting rod can move in the sliding groove on the door knife base plate, and the starting tension spring is used to drive the starting block to rotate clockwise, and when the starting rod moves into the arc groove of the starting block, the starting block is stuck with the starting rod, thereby realizing door opening and unlocking; when the starting block rotates counterclockwise under the push of the external base, the starting rod disengages from the arc groove on the starting block, so that the starting rod drives the first connecting block to rotate, thereby pushing the lock hook unlocking shaft to disengage from the left door knife arm, and at the same time, the blocking cover compression spring releases potential energy and thereby drives the screw to lock and close the door.

[0022] In a specific embodiment, the elevator door lock device also includes an emergency unlocking component, which includes a rope, a column, an emergency unlocking piece, and an emergency unlocking spring. The emergency unlocking piece is movably arranged on the door knife base plate, the column is arranged on the emergency unlocking piece, the rope is arranged at the first end of the emergency unlocking piece, the first end of the emergency unlocking spring is connected to the second end of the emergency unlocking piece, and the second end of the emergency unlocking spring is connected to the door knife base plate. The rope is used to move downward when subjected to external force and drive the emergency unlocking piece to move downward, so that the column touches the rotating part, and then the rotating part drives the lock hook to unlock, so that the emergency unlocking spring accumulates potential energy when it is stretched downward, so that when the external force of the rope disappears, the emergency unlocking spring releases the potential energy to reset the emergency unlocking piece.

[0023] Preferably, the emergency unlocking piece includes a through hole and a sliding groove, the emergency unlocking piece is arranged on the door knife base plate by passing through the sliding groove on the emergency unlocking piece through a screw, the screw can move in the sliding groove on the emergency unlocking piece, the column is arranged on the emergency unlocking piece and passes through the sliding groove on the door knife base plate, the rope is arranged on the first end of the emergency unlocking piece through a screw, the first end of the emergency unlocking spring is connected to the second end of the emergency unlocking piece through the through hole of the emergency unlocking piece, the second end of the emergency spring is connected to the door knife base plate through a screw, the sliding groove on the emergency unlocking piece has the same length as the sliding groove on the door knife base plate, and the emergency unlocking piece can move up and down within the range of the sliding groove on the door knife base plate through the screws arranged on the door knife base plate and the column arranged on the emergency unlocking piece.

[0024] A control method for an elevator door lock device, comprising:

[0025] When the car is in the unlocking area, the starter rod drives the first connecting block to rotate counterclockwise, so that the first swing block drives the rotating member to rotate and pushes the first connecting member to move, and then the first connecting member pushes the lock hook to rotate downward to achieve unlocking, and the lock hook drives the switch contact to disengage from the switch socket to achieve normal door opening, and the elastic mechanism accumulates potential energy when the lock hook rotates downward;

[0026] The start rod drives the first connection block to rotate clockwise, so that the first swing block is disengaged from the lock hook unlocking shaft, and then the elastic mechanism releases potential energy, so that the lock hook rotates upward and resets to achieve locking, and the lock hook drives the switch contact to contact the switch socket to achieve normal door closing;

[0027] When prying the door from outside the car, use a triangular key to unlock the floor door, so that the left door knife arm touches the main door ball of the floor door. The left door knife arm moves outward under the drive of the main door ball of the floor door and drives the rotating part to rotate. The rotating part pushes the first connecting part to move and further drives the locking hook to rotate downward, thereby unlocking the car door, and the locking hook drives the switch contact to disengage from the switch socket, and the car door opens.

[0028] In a specific embodiment:

[0029] When the car is in the non-unlocking area, the motor moves the synchronous belt to move in the door opening direction, the synchronous belt drives the start rod and drives the first connecting block to rotate counterclockwise, the door knife arm assembly cannot contact the floor door ball during the retraction process, and then the rotating part does not move, and then the lock hook does not move, and the car door does not open;

[0030] When the door is pried open from the car, the motor does not move, and then the synchronous belt does not move, and the starting rod also remains stationary. When the door is pried open, the door hanging plate drives the door knife bottom plate to move, and the door knife arm assembly cannot contact the floor door ball, and then the door knife arm assembly does not move, and the door hanging plate continues to move in the door opening direction until the lock hook hooks the external base, and the car door does not open.

[0031] In a specific embodiment:

[0032] When opening the door from outside the car, first use the triangular key to unlock the floor door, pull the rope downward, and the downward movement of the rope drives the emergency unlocking piece to move downward, so that the emergency unlocking tension spring accumulates potential energy when it is stretched downward, and then the column touches the rotating part, and the rotating part rotates counterclockwise and drives the lock hook to rotate clockwise to unlock the car door. After releasing the rope, the emergency unlocking tension spring releases the potential energy to make the emergency unlocking piece slide upward, and the column on the emergency unlocking piece detaches from the upper end of the rotating part, and the lock hook automatically resets under the action of the baffle cover assembly and the spring to maintain the locked state.

[0033] The present invention has at least the following beneficial effects:

[0034] According to the present invention, an elevator door lock device and a control method thereof include a door knife bottom plate, a starting rod, a door knife arm assembly, a lock hook assembly, a crank swing assembly and a verification switch; when the car moves to the floor station, the starting rod pushes the door knife arm assembly to touch the lock hook unlocking shaft and drives the rotating member to rotate, so that when the rotating member rotates, the lock hook is driven to rotate downward through the first connecting member to achieve unlocking, and the lock hook drives the switch contact to disengage from the switch socket to achieve normal door opening, and the elastic mechanism is used to accumulate potential energy when the lock hook rotates downward. Subsequently, the starting rod pushes the door knife arm assembly to move, so that the door knife arm assembly is disengaged from the lock hook unlocking shaft, and then the elastic mechanism releases the potential energy, so that the lock hook rotates upward to reset to achieve locking, and the lock hook drives the switch contact to contact the switch socket to achieve normal door closing.

[0035] Therefore, an elevator car door lock device and a control method thereof provided by the present invention can ensure the locking of the mechanical part and the safety verification of the electrical circuit at the same time, so that the car door lock has a simple structure and is easy to install and debug, reduces the difficulty of maintenance and the cost of the elevator, and improves the reliability and safety of the car door lock. The opening and closing of doors in various situations becomes simpler, more reliable and safer through such a linked opening and closing method.

[0036] Furthermore, the switch socket includes a slot, the opening direction of the slot is downward, and the switch contact includes a pin, which is plugged into the slot; this arrangement can avoid the accumulation of dust in the switch slot, reduce the impact of the lock hook on the switch socket, and avoid the switch socket being damaged by the lock hook.

[0037] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0039] Figure 1 1 is a structural front view of the elevator car door lock device in the embodiment;

[0040] Figure 2 2. It is a rear view of the structure of the elevator car door lock device in the embodiment;

[0041] Figure 3 This is a front view of the car door lock structure in the normal door opening condition in the embodiment;

[0042] Figure 4 This is a front view of the car door lock structure when the car door is opened from outside the unlocking area in the embodiment;

[0043] Figure 5 It is a front view of the car door lock structure when the motor in the non-unlocking area mistakenly opens the door in the embodiment.

[0044] Description of main component symbols:

[0045] 1-the second swing block; 2-the door knife bottom plate; 3-the rotating part; 4-the door knife arm limiting shaft; 5-the rope; 6-the lock hook unlocking shaft; 7-the column; 8-the emergency unlocking plate; 9-the first swing block; 10-the transition plate; 11-the emergency unlocking spring; 12-the left door knife arm; 13-the door knife arm tension spring; 14-the right door knife arm; 15-the first connecting block; 16-the supporting rod; 17-the cover assembly; 18-the base; 19-the second connecting piece; 20-the external base; 21-the switch socket; 22-the switch contact; 23-the lock hook; 24-the hinge shaft; 25-the first connecting piece; 26-the second connecting block; 27-the rubber bolt; 28-the starting block; 29-the starting block tension spring; 30-the starting rod; 31-the billiard ball shaft; 32-the lock hook limiting shaft; 33-the spring. DETAILED DESCRIPTION

[0046] Example

[0047] like Figure 1 As shown, this embodiment provides an elevator device, including a door knife base plate 2, a starting rod 30, a door knife arm assembly, a lock hook assembly, a crank swing assembly and a verification switch, and the door knife arm assembly is arranged on the door knife base plate 2.

[0048] The lock hook assembly includes a lock hook 23 and an elastic mechanism. The lock hook 23 is rotatably arranged on the door knife base plate 2. The first end of the elastic mechanism is arranged on the lock hook 23, and the second end of the elastic mechanism is arranged on the door knife base plate 2.

[0049] The crank swing assembly includes a rotating member 3, a lock hook unlocking shaft 6, and a first connecting member 25. The first end of the rotating member 3 is rotatably set on the door knife base plate 2, the lock hook unlocking shaft 6 is set on the second end of the rotating member 3, the first end of the first connecting member 25 is rotatably set on the rotating member 3, and the second end of the first connecting member 25 is rotatably set on the lock hook 23.

[0050] The verification switch includes a switch contact 22 and a switch socket 21 . The switch contact 22 is disposed on the lock hook 23 , and the switch socket 21 is disposed on an external base 20 located above the lock hook 23 .

[0051] The starting rod 30 is set on the door knife arm assembly. The starting rod 30 is used to push the door knife arm assembly to move when the lock hook 23 is unlocked, so that the door knife arm assembly touches the lock hook unlocking shaft 6 and drives the rotating member 3 to rotate, and then when the rotating member 3 rotates, the lock hook 23 is driven to rotate downward through the first connecting member 25 to achieve unlocking, and the lock hook 23 drives the switch contact 22 to disengage from the switch socket 21. The elastic mechanism is used to accumulate potential energy when the lock hook 23 rotates downward.

[0052] The starting rod 30 is also used to push the door knife arm assembly to move when the lock hook 23 is locked, so that the door knife arm assembly is disengaged from the lock hook unlocking shaft 6, and then the elastic mechanism releases the potential energy, so that the lock hook 23 rotates upward and resets to achieve locking, and the lock hook 23 drives the switch contact 22 to contact the switch socket 21.

[0053] In this embodiment, the rotating member 3 includes a door knife arm limiting shaft 4 for pushing the door knife arm assembly to unlock, the lock hook unlocking shaft 6 is provided with a billiard ball, the first end of the first connecting member 25 is rotatably set on the rotating member 3 through the door knife arm limiting shaft 4, and the second end of the first connecting member 25 is rotatably set on the lock hook 23 through the hinge shaft 24.

[0054] It should be noted that the configuration method using the articulated shaft 24 is only a preferred configuration method of the present invention, and there are other preferred configuration methods, such as a lead screw, a positioning pin, a bearing, and the like.

[0055] Preferably, the switch socket 21 comprises a slot, the opening direction of the slot faces downward, and the switch contact 22 comprises a pin that is plugged into the slot.

[0056] In this embodiment, the elastic mechanism includes a support rod 16, a spring 33, a baffle assembly 17, a base 18, and a second connecting member 19. The base 18 is arranged on the door knife bottom plate 2, the support rod 16 is movably penetrated on the base 18, the spring 33 and the baffle assembly 17 are penetrated on the support rod 16, and the baffle assembly 17 stops the end of the spring 33, the first end of the second connecting member 19 is rotatably connected to the lock hook 23, and the second end of the second connecting member 19 is connected to the support rod 16.

[0057] Preferably, the elastic mechanism includes at least one baffle cover assembly 17, the baffle cover assembly 17 includes a through hole, one end of the base 18 is provided with a through hole, the first end of the spring 33 is fixed to the first end of the baffle cover assembly 17 and is arranged on the base 18, the second end of the spring 33 is arranged at the second end of the baffle cover assembly 17, the through hole on the baffle cover assembly 17 is coaxial with the spring 33 and the through hole on the base 18, and the support rod 16 passes through the through hole on the base 18, the through hole on the baffle cover compression spring and the spring 33 from top to bottom in sequence.

[0058] In this embodiment, the door knife arm assembly includes a left door knife arm 12, a right door knife arm 14, a first connecting block 15, a second connecting block 26, a transition plate 10, a first pendulum block 9, and a second pendulum block 1. The middle part of the first connecting block 15 is hinged to the door knife base plate 2. The starting rod 30 is connected to the first connecting block 15 to drive the first connecting block 15 to rotate under the drive of an external force. The right door knife arm 14, the first connecting block 15, the transition plate 10, and the second connecting block 26 are hinged in sequence to form a first parallelogram structure. The first pendulum block 9, the transition plate 10, the second pendulum block 1, and the left door knife arm 12 are hinged in sequence to form a second parallelogram structure, so that the starting rod 30 can eventually drive the first pendulum block 9 to move, and then the first pendulum block 9 can touch the billiard ball on the lock hook unlocking shaft 6 to rotate the rotating part 3.

[0059] In this embodiment, the first connecting block 15 and the second connecting block 26 are respectively connected to the door knife base plate 2 through rolling bearings, the upper and lower ends of the right door knife arm 14 are respectively connected to the first ends of the first connecting block 15 and the second connecting block 26 through rolling bearings, the upper and lower ends of the transition plate 10 are respectively connected to the second ends of the first connecting block 15 and the second connecting block 26 through rolling bearings, the other positions of the upper and lower ends of the transition plate 10 are respectively connected to the first swing block 9 and the first end of the lower movable link block through the hinge shaft 24, and the upper and lower ends of the left door knife arm 12 are respectively connected to the second ends of the first swing block 9 and the second swing block 1 through the hinge shaft 24.

[0060] Preferably, another position of the upper end of the right door knife arm 14 is connected to the door knife base plate 2 through the door knife arm tension spring 13, and a billiard shaft 31 is installed at the lower end of the first connecting block 15. The billiard shaft 31 can move freely in the slide groove of the door knife base plate 2, and the billiard shaft 31 is used to cooperate with the impact bow at the center position of the door machine.

[0061] like Figure 2 As shown, in this embodiment, the elevator car door lock device also includes a starting block 28 and a starting block tension spring 29. The first end of the starting block 28 is rotatably arranged on the door knife base plate 2, the first end of the starting block tension spring 29 is connected to the second end of the starting block 28, the second end of the starting block tension spring 29 is connected to the door knife base plate 2, the first end of the starting rod 30 is arranged on the first connecting block 15, the second end of the starting rod 30 is connected to the synchronous belt driving the car door switch, the starting rod 30 is used to rotate the first connecting block 15 under the drive of the synchronous belt of the car door switch, and the starting tension spring is used to drive the starting block 28 to rotate.

[0062] Preferably, the first end of the starting block 28 is rotatably arranged on the door knife base plate 2 through the hinge shaft 24, the second end of the starting block 28 includes a circular hole and an arc groove, the first end of the starting block tension spring 29 is fixedly connected to the starting block 28 through the circular hole, the starting rod 30 includes a plurality of rolling bearings, the starting rod 30 is used to drive the first connecting block 15 to rotate, the starting rod 30 can move in the slide groove on the door knife base plate 2, the starting tension spring is used to drive the starting block 28 to rotate clockwise, when the starting rod 30 moves into the arc groove of the starting block 28, the starting block 28 is stuck to the starting rod 30, thereby realizing door opening and unlocking; when the starting block 28 rotates counterclockwise under the push of the external base 20, the starting rod 30 disengages from the arc groove on the starting block 28, so that the starting rod 30 drives the first connecting block 15 to rotate, thereby pushing the lock hook unlocking shaft 6 to disengage from the left door knife arm 12, and at the same time the cover compression spring releases the potential energy and drives the screw to realize locking and closing the door.

[0063] Preferably, a rubber bolt 27 is provided at one end of the external base 20 contacting the start block 28 . The provision of the rubber bolt 27 prevents the external base 20 from directly contacting the start block 28 , thereby preventing damage to the surface of the start block 28 .

[0064] In this embodiment, the elevator door lock device also includes an emergency unlocking component, which includes a rope 5, a column 7, an emergency unlocking piece 8, and an emergency unlocking spring 11. The emergency unlocking piece 8 is movably arranged on the door knife base plate 2, and the column 7 is arranged on the emergency unlocking piece 8. The rope 5 is arranged at the first end of the emergency unlocking piece 8, and the first end of the emergency unlocking spring 11 is connected to the second end of the emergency unlocking piece 8. The second end of the emergency unlocking spring 11 is connected to the door knife base plate 2. The rope 5 is used to move downward when subjected to external force and drive the emergency unlocking piece 8 to move downward, so that the column 7 touches the rotating member 3, and then the rotating member 3 drives the lock hook 23 to unlock, so that the emergency unlocking spring 11 accumulates potential energy when it is stretched downward, so that when the external force of the rope 5 disappears, the emergency unlocking spring 11 releases the potential energy to reset the emergency unlocking piece 8.

[0065] Preferably, the door knife base plate 2 includes a plurality of slide grooves, and a lock hook limiting shaft 32 is provided on the lock hook 23 , and the lock hook limiting shaft 32 can move in the slide grooves of the door knife base plate 2 .

[0066] Preferably, the emergency unlocking piece 8 includes a through hole and a slide groove, the emergency unlocking piece 8 is set on the door knife base plate 2 by passing through the slide groove on the emergency unlocking piece 8 with a screw, the screw can move in the slide groove on the emergency unlocking piece 8, the column 7 is set on the emergency unlocking piece 8 and passes through the slide groove on the door knife base plate 2, the rope 5 is set at the first end of the emergency unlocking piece 8 by the screw, the first end of the emergency unlocking spring 11 is connected to the second end of the emergency unlocking piece 8 through the through hole of the emergency unlocking piece 8, the second end of the emergency spring is connected to the door knife base plate 2 by a screw, the slide groove on the emergency unlocking piece 8 has the same length as the slide groove on the door knife base plate 2, and the emergency unlocking piece 8 can move up and down within the slide groove range on the door knife base plate 2 through the screws set on the door knife base plate 2 and the column 7 set on the emergency unlocking piece 8.

[0067] In this embodiment, a control method of an elevator door lock device includes:

[0068] When the car is in the unlocking area, Figure 3 As shown, the start rod 30 drives the first connection block 15 to rotate counterclockwise, so that the first swing block 9 drives the rotating member 3 to rotate and pushes the first connection member 25 to move, and then the first connection member 25 pushes the lock hook 23 to rotate downward to achieve unlocking, and the lock hook 23 drives the switch contact 22 to disengage from the switch socket 21 to achieve normal door opening, and the elastic mechanism accumulates potential energy when the lock hook 23 rotates downward;

[0069] The start rod 30 drives the first connection block 15 to rotate clockwise, so that the first swing block 9 is separated from the lock hook unlocking shaft 6, and then the elastic mechanism releases potential energy, so that the lock hook 23 rotates upward to reset and realizes locking, and the lock hook 23 drives the switch contact 22 to contact the switch socket 21, so that the door is closed normally;

[0070] When opening the door from outside the car, Figure 4 As shown, the landing door is unlocked with a triangular key, so that the left door knife arm 12 touches the main door ball of the landing door. The left door knife arm 12 moves outward under the drive of the main door ball of the landing door and drives the rotating member 3 to rotate. The rotating member 3 pushes the first connecting member 25 to move and further drives the lock hook 23 to rotate downward, thereby unlocking the car door, and the lock hook 23 drives the switch contact 22 to disengage from the switch socket 21, and the car door opens.

[0071] In this embodiment:

[0072] When the car is in the non-unlocking area, Figure 5 As shown, the motor moves to move the synchronous belt in the door opening direction, the synchronous belt drives the starter rod 30 and drives the first connecting block 15 to rotate counterclockwise, the door knife arm assembly cannot contact the floor door ball during the retraction process, and then the rotating member 3 does not move, and then the lock hook 23 does not move, and the car door does not open;

[0073] When the door is pried open from the car, the motor does not move, and the synchronous belt does not move, and the starting rod 30 also remains stationary. When the door is pried open, the door hanging plate drives the door knife base plate 2 to move, and the door knife arm assembly cannot contact the floor door ball, and then the door knife arm assembly does not move, and the door hanging plate continues to move in the door opening direction until the lock hook 23 hooks the external base 20, and the car door does not open.

[0074] In this embodiment:

[0075] When opening the door from outside the car, first use the triangular key to unlock the floor door, pull the rope 5 downward, and the downward movement of the rope 5 drives the emergency unlocking piece 8 to move downward, so that the emergency unlocking tension spring 11 accumulates potential energy when it is stretched downward, and then the column 7 touches the rotating member 3, the rotating member 3 rotates counterclockwise and drives the lock hook 23 to rotate clockwise to unlock the car door. After releasing the rope 5, the emergency unlocking tension spring 11 releases the potential energy to make the emergency unlocking piece 8 slide upward, and the column 7 on the emergency unlocking piece 8 breaks away from the upper end of the rotating member 3, and the lock hook 23 automatically resets under the action of the baffle cover assembly 17 and the spring 33 to maintain the locked state.

[0076] Compared with the prior art, the starting rod in the present invention is used to push the door knife arm assembly to move when the lock hook is unlocked, so that the door knife arm assembly touches the lock hook unlocking shaft and drives the rotating part to rotate, and then when the rotating part rotates, it drives the lock hook to rotate downward through the first connecting member to achieve unlocking, and the lock hook drives the switch contact to disengage from the switch socket, and the elastic mechanism is used to accumulate potential energy when the lock hook rotates downward; the starting rod is also used to push the door knife arm assembly to move when the lock hook is locked, so that the door knife arm assembly is disengaged from the lock hook unlocking shaft, and then the elastic mechanism releases the potential energy, so that the lock hook rotates upward and resets to achieve locking, and the lock hook drives the switch contact to contact the switch socket.

[0077] Therefore, an elevator car door lock device and a control method thereof provided by the present invention can ensure the locking of the mechanical part and the safety verification of the electrical circuit at the same time, so that the car door lock has a simple structure and is easy to install and debug, reduces the difficulty of maintenance and the cost of the elevator, and improves the reliability and safety of the car door lock. The opening and closing of doors in various situations becomes simpler, more reliable and safer through such a linked opening and closing method.

[0078] Furthermore, the switch socket includes a slot, the opening direction of the slot is downward, and the switch contact includes a pin, which is plugged into the slot; compared with the prior art, such a configuration can avoid the accumulation of dust in the switch slot, reduce the impact of the lock hook on the switch socket, avoid the switch socket being damaged by the lock hook, and further improve the practicality of the device.

[0079] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings.

[0080] Those skilled in the art will appreciate that the accompanying drawings are merely schematic diagrams of a preferred implementation scenario, and the modules or processes in the accompanying drawings are not necessarily required for implementing the present invention.

[0081] Those skilled in the art will appreciate that the modules in the device in the implementation scenario can be distributed in the device in the implementation scenario according to the implementation scenario description, or can be changed accordingly and located in one or more devices different from the implementation scenario. The modules in the above implementation scenario can be combined into one module, or can be further split into multiple sub-modules.

[0082] The above serial numbers of the present invention are only for description and do not represent the advantages or disadvantages of the implementation scenarios.

[0083] The above disclosure is only a few specific implementation scenarios of the present invention, but the present invention is not limited thereto, and any changes that can be conceived by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. An elevator door lock device, characterized in that: It includes a door knife bottom plate, a starter rod, a door knife arm assembly, a lock hook assembly, a crank swing assembly and a verification switch, wherein the door knife arm assembly is arranged on the door knife bottom plate; The lock hook assembly comprises a lock hook and an elastic mechanism, wherein the lock hook is rotatably arranged on the door knife bottom plate, a first end of the elastic mechanism is arranged on the lock hook, and a second end of the elastic mechanism is arranged on the door knife bottom plate; The crank swing assembly includes a rotating member, a lock hook unlocking shaft, and a first connecting member, wherein the first end of the rotating member is rotatably arranged on the door knife bottom plate, the lock hook unlocking shaft is arranged on the second end of the rotating member, the first end of the first connecting member is rotatably arranged on the rotating member, and the second end of the first connecting member is rotatably arranged on the lock hook; The verification switch includes a switch contact and a switch socket, wherein the switch contact is arranged on the lock hook, and the switch socket is arranged on an external base located above the lock hook; The starter rod is arranged on the door knife arm assembly, and the starter rod is used to push the door knife arm assembly to move when the lock hook is unlocked, so that the door knife arm assembly touches the lock hook unlocking shaft and drives the rotating member to rotate, and then when the rotating member rotates, the lock hook is driven to rotate downward through the first connecting member to achieve unlocking, and the lock hook drives the switch contact to disengage from the switch socket, and the elastic mechanism is used to accumulate potential energy when the lock hook rotates downward; The actuating rod is also used to push the door knife arm assembly to move when the lock hook is locked, so that the door knife arm assembly is disengaged from the lock hook unlocking shaft, and then the elastic mechanism releases potential energy, so that the lock hook rotates upward and resets to achieve locking, and the lock hook drives the switch contact to contact the switch socket; The door knife arm assembly includes a left door knife arm, a right door knife arm, a first connecting block, a second connecting block, a transition plate, a first swing block, and a second swing block. The middle part of the first connecting block is hinged to the door knife bottom plate. The starting rod is connected to the first connecting block to drive the first connecting block to rotate under the drive of an external force. The right door knife arm, the first connecting block, the transition plate, and the second connecting block are hinged in sequence to form a first parallelogram structure. The first swing block, the transition plate, the second swing block, and the left door knife arm are hinged in sequence to form a second parallelogram structure, so that the starting rod can eventually drive the first swing block to move, and then the first swing block can touch the bumper on the lock hook unlocking shaft to rotate the rotating member. The switch socket comprises a slot, the opening direction of the slot faces downward, and the switch contact comprises a pin, which is plugged into and matched with the slot.

2. The elevator door lock device according to claim 1, characterized in that: The rotating member includes a door knife arm limiting shaft for pushing the door knife arm assembly to unlock, the lock hook unlocking shaft is provided with a billiard ball, the first end of the first connecting member is rotatably arranged on the rotating member through the door knife arm limiting shaft, and the second end of the first connecting member is rotatably arranged on the lock hook through a hinge shaft.

3. The elevator door lock device according to claim 1, characterized in that: The elastic mechanism includes a support rod, a spring, a baffle assembly, a base, and a second connecting member. The base is arranged on the door knife bottom plate, the support rod is movably inserted into the base, the spring and the baffle assembly are inserted into the support rod, and the baffle assembly stops the end of the spring. The first end of the second connecting member is rotatably connected to the lock hook, and the second end of the second connecting member is connected to the support rod.

4. The elevator door lock device according to claim 1, characterized in that: The first connecting block and the second connecting block are respectively connected to the door knife base plate through rolling bearings, the upper and lower ends of the right door knife arm are respectively connected to the first ends of the first connecting block and the second connecting block through rolling bearings, the upper and lower ends of the transition plate are respectively connected to the second ends of the first connecting block and the second connecting block through rolling bearings, the other positions of the upper and lower ends of the transition plate are respectively connected to the first end of the first swing block and the lower movable link block through hinge shafts, and the upper and lower ends of the left door knife arm are respectively connected to the second ends of the first swing block and the second swing block through hinge shafts.

5. The elevator door lock device according to claim 1, characterized in that: It also includes a starting block and a starting block tension spring, the first end of the starting block is rotatably arranged on the door knife base plate, the first end of the starting block tension spring is connected to the second end of the starting block, the second end of the starting block tension spring is connected to the door knife base plate, the first end of the starting rod is arranged on the first connecting block, the second end of the starting rod is connected to the synchronous belt driving the car door switch, the starting rod is used to rotate the first connecting block under the drive of the synchronous belt of the car door switch, and the starting block tension spring is used to drive the starting block to rotate.

6. The elevator door lock device according to claim 1, characterized in that: It also includes an emergency unlocking component, which includes a rope, a column, an emergency unlocking piece, and an emergency unlocking spring. The emergency unlocking piece is movably arranged on the door knife base plate, the column is arranged on the emergency unlocking piece, the rope is arranged at a first end of the emergency unlocking piece, the first end of the emergency unlocking spring is connected to the second end of the emergency unlocking piece, and the second end of the emergency unlocking spring is connected to the door knife base plate. The rope is used to move downward when subjected to an external force, driving the emergency unlocking piece to move downward, so that the column touches the rotating part, and then the rotating part drives the lock hook to unlock, so that the emergency unlocking spring accumulates potential energy when it is stretched downward, so that when the external force of the rope disappears, the emergency unlocking spring releases the potential energy to reset the emergency unlocking piece.

7. A control method for an elevator door lock device according to any one of claims 1 to 6, characterized in that: When the car is in the unlocking area, the starter rod drives the first connecting block to rotate counterclockwise, so that the first swing block drives the rotating member to rotate and pushes the first connecting member to move, and then the first connecting member pushes the lock hook to rotate downward to achieve unlocking, and the lock hook drives the switch contact to disengage from the switch socket to achieve normal door opening, and the elastic mechanism accumulates potential energy when the lock hook rotates downward; The start rod drives the first connection block to rotate clockwise, so that the first swing block is disengaged from the lock hook unlocking shaft, and then the elastic mechanism releases potential energy, so that the lock hook rotates upward and resets to achieve locking, and the lock hook drives the switch contact to contact the switch socket to achieve normal door closing; When prying the door from outside the car, use a triangular key to unlock the floor door, so that the left door knife arm touches the main door ball of the floor door. The left door knife arm moves outward under the drive of the main door ball of the floor door and drives the rotating part to rotate. The rotating part pushes the first connecting part to move and further drives the locking hook to rotate downward, thereby unlocking the car door, and the locking hook drives the switch contact to disengage from the switch socket, and the car door opens.

8. The control method of the elevator door lock device according to claim 7, characterized in that: When the car is in the non-unlocking area, the motor moves the synchronous belt to move in the door opening direction, the synchronous belt drives the start rod and drives the first connecting block to rotate counterclockwise, the door knife arm assembly cannot contact the floor door ball during the retraction process, and then the rotating part does not move, and then the lock hook does not move, and the car door does not open; When the door is pried open from the car, the motor does not move, and then the synchronous belt does not move, and the starting rod also remains stationary. When the door is pried open, the door hanging plate drives the door knife bottom plate to move, and the door knife arm assembly cannot contact the floor door ball, and then the door knife arm assembly does not move, and the door hanging plate continues to move in the door opening direction until the lock hook hooks the external base, and the car door does not open.

9. The control method of the elevator door lock device according to claim 8, characterized in that: When opening the door from outside the car, first use the triangular key to unlock the floor door, pull the rope downward, and the downward movement of the rope drives the emergency unlocking piece to move downward, so that the emergency unlocking tension spring accumulates potential energy when it is stretched downward, and then the column touches the rotating part, and the rotating part rotates counterclockwise and drives the lock hook to rotate clockwise to unlock the car door. After releasing the rope, the emergency unlocking tension spring releases the potential energy to make the emergency unlocking piece slide upward, and the column on the emergency unlocking piece detaches from the upper end of the rotating part, and the lock hook automatically resets under the action of the baffle cover assembly and the spring to maintain the locked state.

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