CN220264866U - Hall door control device of household ladder - Google Patents

Abstract

The utility model discloses a hoistway door control device of a household ladder, which comprises a track and a power device, wherein two gantry crane assemblies are arranged on the track in a sliding manner, an electric door lock for limiting opening and closing is arranged between the gantry crane assemblies, and the power device drives the gantry crane assemblies to be opened or closed along the track in a split manner; the electric door lock further comprises a control device, wherein the control device is connected with the power device and the electric door lock. According to the scheme, under the condition that the car door device is not installed, the power device is used for realizing the automatic opening and closing of the hall door device, so that the single-layer hall door control device can be automatically opened and closed, or the multi-layer hall door control device can be simultaneously opened and closed; the unlocking device (i.e., electric door lock) of the self-driven hall door control device is not mounted on the car door and does not rely on the driving force generated by the car door motor to unlock.

Description

Hall door control device of household ladder

Technical Field

The utility model relates to the technical field of elevator hoistway doors, in particular to a hoistway door control device of a household ladder.

Background

In the traditional elevator door opening and closing, after a moving car (the car door is closed in the running process) reaches the corresponding hall door position, the car door is simultaneously linked with the hall door to open the door; when the elevator leaves, the hall doors need to be closed at the same time; and the corresponding parts of the car cannot interfere with the movement of the stationary hoistway door when running. The car door device adopts a complex structure of a set of centralized car door motor drive, a combined unlocking system, a distributed N-layer hall door device and a signal system (the car side is a door opening and closing main signal, and only a safety loop on the hall side is connected in series to give an on-off signal). The composite unlocking system is formed by matching a set of door knives and N layers of hall door locks: the door knife and the hall door locks of different floors are provided with fit gaps in the horizontal direction, after the door knife reaches the different floors and the car reaches the stop floor, the door knife is correspondingly inserted into the hall door lock of the corresponding floor, the door motor (at the side of the car door) drives the door knife to open, and the open door knife transversely drives the hall door lock to unlock and open the hall door. After the hall door is closed, the door knife is retracted, a gap is formed between the door knife and the hall door lock, and then the lift car vertically leaves. The conventional hall door device needs to move to the corresponding hall door device to open and close the hall doors, and cannot open a plurality of hall doors at the same time. According to the standard GB/T21739 household elevator manufacturing and installation safety standard requirements, a low-speed household elevator can not need a car door, and the conventional elevator door opening and closing cannot realize the self-running of a hall door device.

For example, chinese patent publication No. CN109399429B, 11/13/2020, entitled "a hoistway door booster door closing device", includes that a booster is provided on an upper sill of an hoistway door, and when an elevator opens and closes the door, the booster is in an extended state and abuts against a car door knife, wherein at the end of the elevator closing, the booster is engaged with the car door knife by abutting against the car door knife, and the hoistway door is completely closed by using the driving force of the car door; in the elevator up-and-down elevator running process, the booster device is in a contracted state, and a gap is reserved between the booster device and a car door cutter, so that the elevator running is not influenced; the power assisting device comprises a bracket, an electromagnetic coil, a spring and a shaft, wherein the power assisting device is fixed on a hoistway door upper sill door hanger plate, the electromagnetic coil is arranged at the front end of the bracket, the shaft is arranged at the front end of the axis of the electromagnetic coil, and the spring is connected with one end of the shaft and is arranged at the other side of the electromagnetic coil; when the electromagnetic coil is powered on, the shaft moves towards the electromagnetic coil along the axis of the electromagnetic coil, and the power assisting device is in a contracted state; when the electromagnetic coil is powered off, the shaft is reset under the action of the spring, and the power assisting device is in an extending state.

The existing patents have the following defects: the traditional hall door device needs the car door device to move to the corresponding hall door device to open and close the hall door, and the hall door device cannot be opened and closed by itself and cannot be opened simultaneously.

Disclosure of Invention

The utility model aims to solve the problems that a traditional hall door device needs a car door device to move to a corresponding hall door device to open and close a hall door, and the hall door device cannot be opened and closed by itself and cannot be opened simultaneously with a plurality of hall doors.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

the hoistway door control device of the household ladder comprises a track and a power device, wherein two gantry crane assemblies are arranged on the track in a sliding manner, an electric door lock for limiting opening and closing is arranged between the gantry crane assemblies, and the power device drives the gantry crane assemblies to be opened or closed along the track in a split manner; the electric door lock further comprises a control device, wherein the control device is connected with the power device and the electric door lock. According to the hall door control device of the household ladder, the hall door device (comprising the hall door plate and connected with the door hanging component) is automatically opened and closed through the power device under the condition that the car door device is not installed. The control device comprises a sensor, when the car moves to a specified floor, the control device controls the electric door lock of the hall door control device of the floor to be unlocked and controls the power device to drive the door hanger assembly to be opened or closed. When maintenance personnel operate at the bottom of a well or any floor, the lift car stops at other floors, and at the moment, the control device can control the hall door control device of the floor needing operation to be opened or closed, so that the maintenance personnel can conveniently maintain the operation. The control device and the N-layer active hall door control device are combined to realize the automatic door opening and closing operation of the single-layer hall door control device or the simultaneous door opening and closing operation of the multi-layer hall door control device. The unlocking device (i.e., electric door lock) of the self-driven hall door control device is not mounted on the car door and does not rely on the driving force generated by the car door motor to unlock.

Preferably, the power device comprises a driving belt, a tensioning wheel and a door motor for driving the tensioning wheel to rotate, wherein the driving belt bypasses the tensioning wheel, and the door motor drives the driving belt to rotate through driving the tensioning wheel. The control device controls the opening or closing of the door motor.

Preferably, the door hanger assembly is provided with a connecting piece, the connecting piece is connected with a driving belt, and the power device drives the door hanger assembly to be opened or closed along the track through the driving belt. The upper end of the connecting piece is connected with the driving belt, and the lower end of the connecting piece is connected with the door hanger assembly.

Preferably, the number of the connecting pieces is two, the connecting pieces are in one-to-one correspondence with the gantry crane assemblies, and the connecting pieces are connected with the driving belt. The driving belt drives the gantry crane assembly to move along the sliding rail simultaneously.

Preferably, the power device further comprises pulley steel wire rope assemblies, a connecting piece is arranged on any one of the door hanging assemblies, the connecting piece is connected with the driving belt, and the door hanging assembly provided with the connecting piece drives the other door hanging assembly to move along the track through the pulley steel wire rope assemblies. The driving belt drives one of the door hanger components to move along the sliding rail, and the other door hanger component is driven by the door hanger component to move along the rail through the pulley steel wire rope component.

Preferably, the pulley steel wire rope assembly comprises a pulley arranged on the track and a steel wire rope sleeved on the pulley, and the gantry crane assembly is connected with the steel wire rope. The pulleys are distributed along the length direction of the track.

Preferably, the electric door lock controls the lock tongue to limit the opening and closing of the door hanging component.

Preferably, the electric door lock comprises a limiting plate and an electric switch arranged on one door hanging component and an electromagnetic lock component arranged on the other door hanging component, wherein the electromagnetic lock component comprises a lock tongue, and the lock tongue is pulled out of or inserted into the limiting plate to limit the door hanging component to be opened and closed. The electromagnetic lock assembly further comprises a movable base, a locking assembly and a reset piece, wherein the locking assembly is arranged on the movable base, the movable base is arranged on the door hanging assembly, the electromagnetic lock drives the lock tongue to stretch out and draw back, the reset piece drives the lock tongue to be pulled away from the limiting plate so as to unlock the door hanging assembly, and the reset piece can adopt a reset spring in the scheme.

Preferably, the electromagnetic lock assembly is provided with an electrical contact, and the electrical contact is matched with the electrical switch. When the door hanger component is closed, the electrical contact is contacted with the electrical switch, the electrical switch starts the electromagnetic lock to extend out of the lock tongue, and the lock tongue is locked with the limiting plate.

Preferably, the electric door lock comprises a hook arranged on one door hanging component and a lock tongue arranged on the other door hanging component, the lock tongue is clamped with the hook in the horizontal direction, the lock tongue is arranged on the connecting piece, a guide limiting plate is arranged on the door hanging component provided with the lock tongue, a guide groove is formed in the guide limiting plate, the upper end of the connecting piece is connected with the driving belt through a switching piece, the upper end of the connecting piece is rotatably arranged on the switching piece, the lower end of the connecting piece is rotatably arranged on the door hanging component, a guide post is arranged on the connecting piece, the guide post is slidably arranged in the guide groove of the guide limiting plate, and the connecting piece rotates the lock tongue around the lower end of the connecting piece to realize opening and closing of the electric door lock. The guide groove is an arc taking a rotating point at the lower end of the connecting piece as a circle center, and the arc opening faces downwards. When the electric door lock is in a locking state, the hook is clamped with the lock tongue, and the guide post is positioned at the highest point of the middle part of the guide groove. When the adapting piece drives the connecting piece to move towards two sides of the hoistway door, the guide post moves along the guide groove, and one end of the lock tongue, which is clamped with the hook, rotates and is tilted, so that the lock tongue is separated from the hook, and the electric door lock is unlocked.

Therefore, the utility model has the following beneficial effects: (1) The automatic opening and closing of the hall door device can be realized through the power device under the condition that the car door device is not installed, so that the automatic opening and closing door operation of the single-layer hall door control device can be realized, or the simultaneous opening and closing door operation of the multi-layer hall door control device can be realized; (2) The unlocking device (namely an electric door lock) of the self-driven hoistway door control device is not arranged on the car door and does not rely on the driving force generated by the car door motor to unlock; (3) When maintenance personnel operate at the bottom of a well or any floor, the lift car stops at other floors, and at the moment, the control device can control the hall door control device of the floor needing operation to be opened or closed, so that the maintenance personnel can conveniently maintain the operation.

Drawings

Fig. 1 is a schematic structural view of a first embodiment of the present utility model.

Fig. 2 is a schematic structural diagram of a second embodiment of the present utility model.

Fig. 3 is a schematic structural view of a third embodiment of the present utility model.

Fig. 4 is a schematic structural view of the electric door lock of the present utility model.

The following figures are shown:

track 1, door hanging component 2, control device 3, driving belt 4, tensioning wheel 5, door motor 6,

A connecting piece 7, a guide post 7.1,

Pulley 8, wire rope 9, spring bolt 10, limiting plate 11, electric switch 12, electromagnetic lock component 13, electric contact 14, hook 15,

A guide limiting plate 16, a guide groove 16.1,

An adapter 17, a movable base 18, a locking assembly 19 and a reset piece 20.

Detailed Description

In order to make the purposes, technical solutions and advantages of the technical solution embodiments of the present utility model more clear, the present utility model is further described below with reference to the accompanying drawings and the detailed description.

The first embodiment is that a hoistway door control device of a household ladder as shown in fig. 1 comprises a track 1 and a power device, wherein two gantry crane assemblies 2 are slidably arranged on the track 1, an electric door lock for limiting opening and closing is arranged between the gantry crane assemblies 2, and the power device drives the gantry crane assemblies 2 to be opened or closed along the track 1; the electric door lock further comprises a control device 3, wherein the control device 3 is connected with the power device and the electric door lock.

In the hoistway door control device of the household elevator described in the first embodiment, the hoistway door device (including the hoistway door plate connected with the door hanger assembly 2) is automatically opened and closed by the power device without installing the car door device. The control device 3 comprises a sensor, when the car moves to a specified floor, the control device 3 controls the unlocking of an electric door lock of a hall door control device of the floor and controls a power device to drive the door hanger assembly 2 to be opened or closed. When maintenance personnel work at the bottom of a well or any floor, the lift car stops at other floors, and at the moment, the control device 3 can control the opening or closing of a hall door control device of the floor needing to work, so that the maintenance personnel can conveniently maintain the work. The control device 3+N layers of active hall door control devices are combined to realize the automatic door opening and closing operation of the single-layer hall door control device or the simultaneous door opening and closing operation of the multi-layer hall door control device. The unlocking device (i.e., electric door lock) of the self-driven hall door control device is not mounted on the car door and does not rely on the driving force generated by the car door motor 6 to unlock. The problem that the traditional hall door device can only be opened and closed when the car door device moves to the corresponding hall door device is solved, the hall door device cannot be opened and closed by itself, and a plurality of hall doors cannot be opened simultaneously.

Specifically, power device includes drive belt 4, take-up pulley 5 and drive take-up pulley 5 pivoted door motor 6, drive belt 4 bypasses take-up pulley 5, door motor 6 drives drive belt 4 through drive take-up pulley 5 and rotates. The control device 3 controls the opening or closing of the door motor 6.

In this embodiment, power device still includes pulley 8 wire rope 9 subassembly, is equipped with connecting piece 7 on arbitrary door hanger assembly 2, connecting piece 7 is connected with drive belt 4, and door hanger assembly 2 that is equipped with connecting piece 7 passes through pulley 8 wire rope 9 subassembly and drives another door hanger assembly 2 and follow track 1 removes. The driving belt 4 drives one door hanging component 2 to move along the sliding rail, and the door hanging component 2 drives the other door hanging component 2 to move along the track 1 through the pulley 8 and the steel wire rope 9 component.

Specifically, the pulley 8 and steel wire rope 9 assembly comprises a pulley 8 arranged on the track 1 and a steel wire rope 9 sleeved on the pulley 8, and the gantry crane assembly 2 is connected with the steel wire rope 9. The pulleys 8 are distributed along the length of the track 1.

In a specific embodiment, the electric door lock limits the opening and closing of the door hanger assembly 2 by controlling the lock tongue 10 thereof. In this embodiment, the electric door lock includes the couple 15 that sets up on one of them door hanger component 2 and sets up the spring bolt 10 on another door hanger component 2, spring bolt 10 with couple 15 joint in the horizontal direction, spring bolt 10 sets up on the connecting piece 7, be equipped with on the door hanger component 2 that is equipped with spring bolt 10 and lead limit plate 16, be equipped with guide slot 16.1 on the limit plate 16, the upper end of connecting piece 7 is connected with drive belt 4 through adapter 17, the upper end rotation of connecting piece 7 sets up on adapter 17, the lower extreme rotation of connecting piece 7 sets up on door hanger component 2, be equipped with guide post 7.1 on the connecting piece 7, guide post 7.1 slides and sets up in guide slot 16.1 of guide limit plate 16, connecting piece 7 rotates the switching of spring bolt 10 realization electric door lock around the lower extreme of connecting piece 7. The guide groove 16.1 is an arc taking a rotating point at the lower end of the connecting piece 7 as a circle center, and the arc opening is downward. When the electric door lock is in a locking state, the hook 15 is clamped with the lock tongue 10, and the guide post 7.1 is positioned at the highest point of the middle part of the guide groove 16.1. When the adapter 17 drives the connecting piece 7 to move towards two sides of the hoistway door, the guide post 7.1 moves along the guide groove 16.1, one end of the lock tongue 10, which is clamped with the hook 15, rotates and lifts, and the lock tongue 10, which is separated from the hook 15, is realized, and the electric door lock is unlocked.

In the second embodiment, as shown in fig. 2 and fig. 4, a hoistway door control device of a household ladder includes a track 1 and a power device, two gantry crane assemblies 2 are slidably arranged on the track 1, an electric door lock for limiting opening and closing is arranged between the gantry crane assemblies 2, and the power device drives the gantry crane assemblies 2 to be opened or closed along the track 1; the electric door lock further comprises a control device 3, wherein the control device 3 is connected with the power device and the electric door lock.

In the hoistway door control device of the household ladder described in the above embodiment, the hoistway door device (including the hoistway door plate connected with the door hanger assembly 2) is automatically opened and closed by the power device without installing the car door device. The control device 3 comprises a sensor, when the car moves to a specified floor, the control device 3 controls the unlocking of an electric door lock of a hall door control device of the floor and controls a power device to drive the door hanger assembly 2 to be opened or closed. When maintenance personnel work at the bottom of a well or any floor, the lift car stops at other floors, and at the moment, the control device 3 can control the opening or closing of a hall door control device of the floor needing to work, so that the maintenance personnel can conveniently maintain the work. The control device 3+N layers of active hall door control devices are combined to realize the automatic door opening and closing operation of the single-layer hall door control device or the simultaneous door opening and closing operation of the multi-layer hall door control device. The unlocking device (i.e., electric door lock) of the self-driven hall door control device is not mounted on the car door and does not rely on the driving force generated by the car door motor 6 to unlock. The problem that the traditional hall door device can only be opened and closed when the car door device moves to the corresponding hall door device is solved, the hall door device cannot be opened and closed by itself, and a plurality of hall doors cannot be opened simultaneously.

Specifically, power device includes drive belt 4, take-up pulley 5 and drive take-up pulley 5 pivoted door motor 6, drive belt 4 bypasses take-up pulley 5, door motor 6 drives drive belt 4 through drive take-up pulley 5 and rotates. The control device 3 controls the opening or closing of the door motor 6.

In this embodiment, power device still includes pulley 8 wire rope 9 subassembly, is equipped with connecting piece 7 on arbitrary door hanger assembly 2, connecting piece 7 is connected with drive belt 4, and door hanger assembly 2 that is equipped with connecting piece 7 passes through pulley 8 wire rope 9 subassembly and drives another door hanger assembly 2 and follow track 1 removes. The driving belt 4 drives one door hanging component 2 to move along the sliding rail, and the door hanging component 2 drives the other door hanging component 2 to move along the track 1 through the pulley 8 and the steel wire rope 9 component.

Specifically, the pulley 8 and steel wire rope 9 assembly comprises a pulley 8 arranged on the track 1 and a steel wire rope 9 sleeved on the pulley 8, and the gantry crane assembly 2 is connected with the steel wire rope 9. The pulleys 8 are distributed along the length of the track 1. The electric door lock limits the opening and closing of the door hanger assembly 2 by controlling the lock tongue 10 thereof. In this embodiment, the electric door lock includes a limiting plate 11 and an electric switch 12 disposed on one door hanger assembly 2, and an electromagnetic lock assembly 13 disposed on the other door hanger assembly 2, where the electromagnetic lock assembly 13 includes a lock tongue 10, and the lock tongue 10 is pulled out or inserted into the limiting plate 11 to limit the opening and closing of the door hanger assembly 2. The electromagnetic lock assembly 13 further comprises a movable base 18, a locking assembly 19 and a reset piece 20, wherein the locking assembly 19 is arranged on the movable base 18, the movable base 18 is arranged on the door hanger assembly 2, the electromagnetic lock drives the lock tongue 10 to stretch out and draw back, the reset piece 20 drives the lock tongue 10 to be pulled away from the limiting plate 11 so as to unlock the door hanger assembly 2, and the reset piece 20 can adopt a reset spring in the scheme.

Further, as shown in fig. 4, an electrical contact 14 is provided on the electromagnetic lock assembly 13, and the electrical contact 14 is matched with the electrical switch 12. When the door hanger assembly 2 is closed, the electrical contact 14 is in contact with the electrical switch 12, the electrical switch 12 starts the electromagnetic lock to extend out of the lock tongue 10, and the lock tongue 10 is locked with the limiting plate 11.

In a third embodiment, as shown in fig. 3 and fig. 4, a hoistway door control device of a household ladder includes a track 1 and a power device, two gantry crane assemblies 2 are slidably arranged on the track 1, an electric door lock for limiting opening and closing is arranged between the gantry crane assemblies 2, and the power device drives the gantry crane assemblies 2 to be opened or closed separately along the track 1; the electric door lock further comprises a control device 3, wherein the control device 3 is connected with the power device and the electric door lock.

In the hoistway door control device of the household ladder described in the above embodiment, the hoistway door device (including the hoistway door plate connected with the door hanger assembly 2) is automatically opened and closed by the power device without installing the car door device. The control device 3 comprises a sensor, when the car moves to a specified floor, the control device 3 controls the unlocking of an electric door lock of a hall door control device of the floor and controls a power device to drive the door hanger assembly 2 to be opened or closed. When maintenance personnel work at the bottom of a well or any floor, the lift car stops at other floors, and at the moment, the control device 3 can control the opening or closing of a hall door control device of the floor needing to work, so that the maintenance personnel can conveniently maintain the work. The control device 3+N layers of active hall door control devices are combined to realize the automatic door opening and closing operation of the single-layer hall door control device or the simultaneous door opening and closing operation of the multi-layer hall door control device. The unlocking device (i.e., electric door lock) of the self-driven hall door control device is not mounted on the car door and does not rely on the driving force generated by the car door motor 6 to unlock. The problem that the traditional hall door device can only be opened and closed when the car door device moves to the corresponding hall door device is solved, the hall door device cannot be opened and closed by itself, and a plurality of hall doors cannot be opened simultaneously.

Specifically, power device includes drive belt 4, take-up pulley 5 and drive take-up pulley 5 pivoted door motor 6, drive belt 4 bypasses take-up pulley 5, door motor 6 drives drive belt 4 through drive take-up pulley 5 and rotates. The control device 3 controls the opening or closing of the door motor 6.

In this embodiment, the door hanger assembly 2 is provided with a connecting piece 7, the connecting piece 7 is connected with the driving belt 4, and the power device drives the door hanger assembly 2 to be opened or closed along the track 1 through the driving belt 4. The upper end of connecting piece 7 is connected with drive belt 4, the lower extreme of connecting piece 7 is connected with door hanger assembly 2, and the number of connecting piece 7 is two, connecting piece 7 with door hanger assembly 2 one-to-one, connecting piece 7 is connected with drive belt 4. The driving belt 4 drives the gantry crane assembly 2 to move along the sliding rail at the same time.

The electric door lock limits the opening and closing of the door hanger assembly 2 by controlling the lock tongue 10 thereof. In this embodiment, the electric door lock includes a limiting plate 11 and an electric switch 12 disposed on one door hanger assembly 2, and an electromagnetic lock assembly 13 disposed on the other door hanger assembly 2, where the electromagnetic lock assembly 13 includes a lock tongue 10, and the lock tongue 10 is pulled out or inserted into the limiting plate 11 to limit the opening and closing of the door hanger assembly 2. The electromagnetic lock assembly 13 further comprises a movable base 18, a locking assembly 19 and a reset piece 20, wherein the locking assembly 19 is arranged on the movable base 18, the movable base 18 is arranged on the door hanger assembly 2, the electromagnetic lock drives the lock tongue 10 to stretch out and draw back, the reset piece 20 drives the lock tongue 10 to be pulled away from the limiting plate 11 so as to unlock the door hanger assembly 2, and the reset piece 20 can adopt a reset spring in the scheme.

Further, as shown in fig. 4, an electrical contact 14 is provided on the electromagnetic lock assembly 13, and the electrical contact 14 is matched with the electrical switch 12. When the door hanger assembly 2 is closed, the electrical contact 14 is in contact with the electrical switch 12, the electrical switch 12 starts the electromagnetic lock to extend out of the lock tongue 10, and the lock tongue 10 is locked with the limiting plate 11.

The utility model has the following beneficial effects: (1) The automatic opening and closing of the hall door device can be realized through the power device under the condition that the car door device is not installed, so that the automatic opening and closing door operation of the single-layer hall door control device can be realized, or the simultaneous opening and closing door operation of the multi-layer hall door control device can be realized; (2) The unlocking device (namely an electric door lock) of the self-driven hoistway door control device is not arranged on the car door and does not rely on the driving force generated by the car door motor to unlock; (3) When maintenance personnel operate at the bottom of a well or any floor, the lift car stops at other floors, and at the moment, the control device can control the hall door control device of the floor needing operation to be opened or closed, so that the maintenance personnel can conveniently maintain the operation.

The above embodiments are merely preferred embodiments of the present utility model, and are not intended to limit the scope of the present utility model. All equivalent changes in shape and structure according to the present utility model are intended to be included in the scope of the present utility model.

Claims (10)

1. The hoistway door control device of the household ladder is characterized by comprising a track (1) and a power device, wherein two gantry crane assemblies (2) are slidably arranged on the track, an electric door lock for limiting opening and closing is arranged between the gantry crane assemblies, and the power device drives the gantry crane assemblies to be opened or closed along the track; the electric door lock further comprises a control device (3), and the control device is connected with the power device and the electric door lock.

2. The hoistway door control device of a household ladder according to claim 1, wherein the power device comprises a driving belt (4), a tensioning wheel (5) and a door motor (6) for driving the tensioning wheel to rotate, the driving belt bypasses the tensioning wheel, and the door motor drives the driving belt to rotate by driving the tensioning wheel.

3. A hoistway door control apparatus for a home ladder according to claim 2, wherein the gantry assembly is provided with a connecting member (7) connected to a driving belt, and the power device drives the gantry assembly to be opened or closed along the track by the driving belt.

4. A hoistway door control apparatus for a home ladder as claimed in claim 3, wherein the number of the connection members is two, the connection members are in one-to-one correspondence with the door hanger assemblies, and the connection members are connected with the driving belt.

5. The hoistway door control device of a household ladder according to claim 2, wherein the power device further comprises pulley wire rope assemblies, a connecting piece is arranged on any one of the gantry crane assemblies, the connecting piece is connected with the driving belt, and the gantry crane assembly provided with the connecting piece drives the other gantry crane assembly to move along the track through the pulley wire rope assemblies.

6. The hoistway door control apparatus of a home ladder as claimed in claim 5, wherein the pulley wire rope assembly includes a pulley (8) provided on the rail and a wire rope (9) fitted around the pulley, and the gantry assembly is connected to the wire rope.

7. A hoistway door control apparatus for a home ladder according to claim 3 or 4 or 5 or 6, wherein said electric door lock restricts opening and closing of said door hanger assembly by controlling a lock tongue (10) thereof.

8. The hoistway door control apparatus of a home ladder according to claim 7, wherein the electric door lock includes a limit plate (11) and an electric switch (12) provided on one of the door hanger assemblies, and an electromagnetic lock assembly (13) provided on the other door hanger assembly, the electromagnetic lock assembly including a lock tongue which is withdrawn from or inserted into the limit plate to limit opening and closing of the door hanger assembly.

9. A hoistway door control apparatus for a home ladder as claimed in claim 8, wherein said electromagnetic lock assembly is provided with electrical contacts (14) which cooperate with an electrical switch.

10. The hoistway door control device of a household ladder according to claim 7, wherein the electric door lock comprises a hook (15) arranged on one of the gantry crane components and a lock tongue arranged on the other gantry crane component, the lock tongue is clamped with the hook in the horizontal direction, the lock tongue is arranged on the connecting piece, a guide limiting plate (16) is arranged on the gantry crane component provided with the lock tongue, a guide groove (16.1) is arranged on the guide limiting plate, the upper end of the connecting piece is connected with the driving belt through a switching piece (17), the upper end of the connecting piece is rotatably arranged on the switching piece, the lower end of the connecting piece is rotatably arranged on the gantry crane component, a guide post (7.1) is arranged on the connecting piece, the guide post is slidably arranged in the guide groove of the guide limiting plate, and the connecting piece rotates the lock tongue around the lower end of the connecting piece to realize opening and closing of the electric door lock.