CN220465793U - Cabin door safety detection device - Google Patents

Abstract

The utility model discloses a cabin door safety detection device which comprises a swing floor and a machine shell, wherein the upper end part of the machine shell is fixed on the swing floor, an opening penetrating up and down is formed in the swing floor, a detection plate assembly is movably installed at the opening, the detection plate assembly is connected with an elastic device capable of driving the detection plate assembly to rise upwards through elastic force, a limiting piece capable of limiting the maximum height of the detection plate assembly to rise upwards is arranged in the machine shell, a driving device capable of driving the limiting piece to move so as to adjust the maximum height of the detection plate assembly to rise upwards is also installed on the machine shell, and a detection element capable of monitoring the height position of the detection plate assembly or a safety shoe is arranged on the upper surface of the detection plate assembly. The cabin door safety detection device can convert the original manual operation of the cabin door safety detection device into an electric control operation mode, and can meet the requirement of unmanned operation of a boarding bridge.

Description

Cabin door safety detection device

Technical Field

The utility model relates to the technical field of boarding bridges, in particular to a cabin door safety detection device.

Background

The boarding bridge is connected with the airplane, the swinging floor at the front end of the airplane receiving opening needs to be adjusted to be basically parallel to the airplane door, and when the distance is 15-20 CM, the airplane receiving opening awning is automatically attached to the surface of the airplane body, and the automatic leveling mechanism extends out to lean on the airplane. When the boarding bridge is in an automatic leveling state, an operator places safety boots below the opened airplane cabin door, and the safety boots are used for detecting whether unexpected uncontrolled movement occurs between the airplane and the boarding bridge, so that the airplane cabin door is quickly close to the floor of the boarding bridge, for example, the situation that tires of the airplane burst, and the like, so that the airplane body and the cabin door are unexpectedly lowered is caused. In the mode of automatic leveling, the boarding bridge can start the protection function of the cabin door of the airplane, when unexpected uncontrolled movement occurs, the safety boots are triggered as long as the speed of the cabin door and the safety boots approaching each other exceeds the automatic leveling range, and then the boarding bridge can quickly descend, so that the cabin door of the airplane cannot collide with the floor of the airplane receiving opening, and the damage to the cabin door of the airplane caused by the unexpected descent of the airplane in the airplane receiving state is prevented.

With the rising demand of airports for automatic boarding bridges, the boarding bridges are required to be capable of achieving unmanned full-automatic boarding, and therefore the placement of safety boots cannot be completed manually.

Disclosure of Invention

In view of the above, an object of the present utility model is to provide a door safety detection device capable of detecting the position of a door without manual placement.

The utility model adopts the technical proposal for solving the technical problems that:

the utility model provides a hatch door safety inspection device, includes swing floor and casing, the upper end of casing is fixed on the swing floor, be provided with the trompil that link up from top to bottom on the swing floor, trompil department movable mounting has the pick-up plate subassembly, the pick-up plate subassembly is connected with the elastic device that can rise upward through elasticity drive it, be provided with in the casing and can inject the locating part of the maximum height that the pick-up plate subassembly upwards risen, still install on the casing can drive the locating part removes in order to adjust the drive arrangement of the maximum height that the pick-up plate subassembly upwards risees, be provided with in the casing and monitor the detecting element of the high position of pick-up plate subassembly or the upper surface of pick-up plate subassembly are provided with the safety shoe.

In a preferred scheme of the utility model, the detection plate assembly comprises a top plate and a connecting sleeve fixed on the lower surface of the top plate, the limiting piece is positioned in the connecting sleeve and can move up and down relative to the connecting sleeve, and the lower end of the connecting sleeve is provided with an end plate which can be abutted with the limiting piece.

In a preferred scheme of the utility model, a guide post is fixed in the casing, a guide sleeve matched with the guide post is fixed on the lower surface of the top plate, and the detection element is used for monitoring the position change of the guide sleeve.

In a preferred scheme of the utility model, the elastic device comprises a spring sleeved on the guide post, the upper end of the spring is abutted with the lower end face of the guide sleeve, and the lower end of the spring is abutted with the inner bottom face of the shell.

In a preferred scheme of the utility model, the end plate is provided with a through hole, the limiting piece is connected with a pull rod penetrating through the through hole downwards, the driving device comprises a motor arranged in the shell, the motor is connected with a speed reducer, an output shaft of the speed reducer is connected with the pull rod through a screw rod pair or a gear rack pair, and an upper limit switch capable of limiting the maximum stroke of upward movement of the pull rod and a lower limit switch capable of limiting the maximum stroke of downward movement of the pull rod are arranged in the shell.

In a preferred embodiment of the present utility model, the detecting element is mounted on the end plate and is used for monitoring a change in a distance between the limiting member and the end plate, and a spring capable of driving the limiting member and the end plate to move away from each other by elastic force is disposed between the limiting member and the end plate.

In a preferred embodiment of the present utility model, a fixing bracket is disposed in the casing, and the elastic device is a nitrogen spring connected between the top plate and the fixing bracket.

In a preferred scheme of the utility model, the end plate is provided with a through hole, the limiting piece is connected with a chain penetrating through the through hole downwards, the shell is rotatably provided with a chain wheel meshed with the chain, the driving device comprises a motor arranged in the shell, the motor is connected with a speed reducer, and an output shaft of the speed reducer is connected with the chain wheel through a worm gear pair.

In a preferred scheme of the utility model, the chain is a unidirectional bending chain, a horizontal guide groove is arranged in the machine shell, the lower part of the chain is slidably arranged in the guide groove, and a pressure spring capable of driving the tail end of the chain to move left and right in the guide groove is arranged in the guide groove.

In a preferred scheme of the utility model, the detection plate assembly comprises a top plate and a lifting frame fixed on the lower surface of the top plate, a motor bracket and a shearing arm are arranged in the shell, a horizontal second guide groove is arranged on the lifting frame, a horizontal first guide groove is arranged on the motor bracket, the shearing arm comprises a first connecting rod and a second connecting rod, the middle part of the first connecting rod is hinged with the middle part of the second connecting rod to form an X-shaped structure, the upper end of the first connecting rod is hinged with the lifting frame, the lower end of the first connecting rod is connected with a first movable part capable of moving along the first guide groove, the lower end of the second connecting rod is hinged with the motor bracket, the upper end of the second connecting rod is connected with a second movable part capable of moving along the second guide groove, the elastic device is connected with the second movable part to drive the second movable part to move towards the upper end of the first connecting rod, the limiting part is movably mounted on the motor bracket and can abut against the first movable part to limit the maximum height of the first movable part, and the limit device can be driven to move up the left limit the limit position detection assembly.

In a preferred embodiment of the present utility model, the elastic means is a tension spring capable of driving the second movable member to move toward the upper end of the first link.

In a preferred embodiment of the present utility model, the first movable member and the second movable member are rollers.

In a preferred scheme of the utility model, the driving device is a gear motor, an output shaft of the gear motor is connected with a screw rod which is transversely arranged, and the limiting piece is a translational nut meshed with the screw rod.

In a preferred embodiment of the present utility model, an anti-slip rubber pad is provided on the upper surface of the swing floor.

In a preferred scheme of the utility model, the upper surface of the top plate is provided with a buffer anti-skid rubber cushion.

The beneficial effects of the utility model are as follows:

1. the cabin door safety detection device main body is arranged under the swing floor, and the cabin door safety detection device main body is in the same state as a normal machine connection state and does not prevent the machine connection.

2. The detection plate assembly is lifted upwards in an electric mode and is released from the swinging floor, and the cabin door safety detection device can be switched to a cabin door monitoring working state; the cabin door safety detection device is kept in a monitoring working state by the elastic force of the spring, when the cabin door is pressed down, the cabin door presses down the detection plate assembly, the spring is compressed, and meanwhile the detection element sends out an emergency descending instruction, so that the boarding bridge floor can be descended in an emergency manner to avoid the cabin door of the aircraft.

3. The cabin door safety detection device can convert the original manual operation of the cabin door safety detection device into an electric control operation mode, and can meet the requirement of unmanned operation of a boarding bridge.

4. The safety distance is increased; the distance of the aircraft due to unexpected sinking is limited, which is theoretically that the radius of the aircraft tire is subtracted by 32% -35% of the tire compression deformation, and the radius of the hub is subtracted. The safety boots for the boarding bridge are directly arranged between the swinging floor and the gap of 15-20 cm of the cabin door, the safety boots have a certain rigid height h, no matter whether the aircraft accidentally bursts tires or the boarding bridge is accidentally lifted, the cabin door and the floor can be finally approached, the cabin door is not damaged by extrusion by the distance= (15-20) -h, and the detection plate assembly of the cabin door safety detection device or the safety boots on the detection plate assembly can be sunk to the position not higher than the upper surface of the swinging floor, so that the safety distance is greatly improved.

Drawings

FIG. 1 is a schematic view of the structure of embodiment 1 of the present utility model with the sensing plate assembly in a raised state;

FIG. 2 is a schematic view of the structure of embodiment 1 of the present utility model with the sensing plate assembly in a retracted state;

FIG. 3 is an exploded view of example 1 of the present utility model;

FIG. 4 is a schematic view showing the structure of embodiment 2 of the present utility model when the detection plate assembly is in the retracted state;

FIG. 5 is a schematic view showing the structure of embodiment 3 of the present utility model when the detection plate assembly is in a raised state;

FIG. 6 is a schematic view of the structure of embodiment 3 of the present utility model when the sensing plate assembly is depressed by the door;

FIG. 7 is a schematic view showing a mounting structure of a chain in embodiment 4 of the present utility model;

FIG. 8 is a schematic view of the structure of embodiment 5 of the present utility model with the sensing plate assembly in a raised state;

fig. 9 is a schematic structural view of embodiment 5 of the present utility model when the detection plate assembly is in the retracted state.

Detailed Description

The technical scheme of the present utility model will be clearly and completely described below with reference to the accompanying drawings.

It should be noted that all directional indicators (such as up, down, left, right, front, and rear …) in the present utility model are merely used to explain the relative positional relationship, movement, etc. between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly. Furthermore, the description of "preferred," "less preferred," and the like, herein is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "preferred", "less preferred" may include at least one such feature, either explicitly or implicitly.

Referring to fig. 1 to 9, the present utility model provides a cabin door safety detection device, which comprises a swing floor 1 and a casing 2, wherein the upper end of the casing 2 is fixed on the swing floor 1, an opening 11 penetrating up and down is provided on the swing floor 1, a detection plate assembly 3 is movably installed at the opening 11, the detection plate assembly 3 is connected with an elastic device capable of driving the detection plate assembly to lift up by elastic force, a limiting piece 41 capable of limiting the maximum height of the detection plate assembly 3 to lift up is provided in the casing 2, a driving device capable of driving the limiting piece 41 to move to adjust the maximum height of the detection plate assembly 3 to lift up is also installed on the casing 2, a detection element 5 capable of monitoring the height position of the detection plate assembly 3 is provided in the casing 2, or a safety shoe 6 is provided on the upper surface of the detection plate assembly 3.

Example 1

Fig. 1 to 3 show an embodiment 1 of the present utility model, in which a detection element 5 capable of monitoring the height position of a detection plate assembly 3 is provided in a housing 2, the detection plate assembly 3 includes a top plate 31, a connecting sleeve 32 fixed to the lower surface of the top plate 31, a stopper 41 is located inside the connecting sleeve 32 and movable up and down with respect to the connecting sleeve 32, and an end plate 321 capable of abutting against the stopper 41 is provided at the lower end of the connecting sleeve 32.

The casing 2 is internally fixed with a guide post 21, the lower surface of the top plate 31 is fixed with a guide sleeve 33 matched with the guide post 21, the guide sleeve 33 and the guide post 21 are in sliding fit or rolling fit, the elastic device comprises a spring 101 sleeved on the guide post 21, the upper end of the spring 101 is abutted with the lower end face of the guide sleeve 33, and the lower end of the spring 101 is abutted with the inner side bottom face of the casing 2.

The end plate 321 is provided with a through hole, the limiting piece 41 is connected with a pull rod 42 penetrating through the through hole downwards, the driving device comprises a motor 43 arranged in the casing 2, the motor 43 is connected with a speed reducer 44, an output shaft of the speed reducer 44 is connected with the pull rod 42 through a ball screw pair, a trapezoidal screw pair or a gear rack pair, and an upper limit switch 201 capable of limiting the maximum stroke of the upward movement of the pull rod 42 and a lower limit switch 202 capable of limiting the maximum stroke of the downward movement of the pull rod 42 are arranged in the casing 2.

The cabin door safety detection device is arranged on a swinging floor 1 of a boarding gate, a proper position capable of covering various cabin doors of a machine type is selected, a machine shell 2, a detection plate assembly 3 and related components are all arranged at the position, in the automatic boarding bridge boarding process, the detection plate assembly 3 is firstly in a retracted state shown in figure 2, the swinging floor 1 is automatically regulated to be basically parallel to the bottom edge of an opened cabin door of the aircraft under the cooperation of a horizontal sensor, the detection plate assembly 3 is positioned below the cabin door, and then a driving device drives a limiting piece 41 to move a certain distance, so that the detection plate assembly 3 is lifted upwards under the action of a spring 101, and at the moment, the cabin door safety detection device is switched to a cabin door monitoring protection working state of the aircraft.

The upper surface of the swing floor 1 is coated with a non-slip rubber pad 91, and the upper surface of the top plate 31 is coated with a buffer non-slip rubber pad 92. The flexible rubber pad can avoid the risk of scratch between metal and an airplane.

When the aircraft is not berthed at ordinary times, the cabin door safety detection device is in a descending and withdrawing state, when the boarding bridge berthes the aircraft, after the front edge of the landing port floor is well butted with the aircraft, the awning automatically leans on the aircraft body, and an empty person opens the cabin door manually.

Under the action of the spring 101, the end part of the bottom of the connecting sleeve 32 and the limiting piece 41 are always kept in a contact state, when the motor 43 drives the pull rod 42 and the limiting piece 41 to slowly rise together, under the action of the elastic force of the spring 101, the detecting plate assembly 3 also rises upwards, when the upper limit switch 201 of the pull rod 42 sends out a signal, the motor 43 stops rotating, the detecting plate assembly 3 reaches the working position and enters the working state.

At this time, the position of the detection plate assembly 3 is to be monitored by the detection element 5, and the detection element 5 may be a proximity sensor, a photoelectric sensor, a micro switch, a travel switch.

When the cabin door is accidentally lowered, the lifting speed controlled by the automatic leveling mechanism can not keep the distance between the cabin door and the swing floor 1 relatively stable, the cabin door can touch the detection plate assembly 3, the detection plate assembly 3 compresses the spring 101 to sink, the detection element 5 sends a triggered signal, and then the boarding bridge control system sends a rapid lowering command to the boarding bridge lifting system to drive the boarding bridge to be emergently lowered, so that the cabin door can be prevented from being damaged due to touching the floor of the boarding bridge.

After the boarding bridge finishes the airplane docking task, the motor 43 drives the pull rod 42 to move downwards, the limiting piece 41 at the top of the pull rod 42 can pull the connecting sleeve 32 and the top plate 31 downwards to overcome the force of the spring 101, so that the detection plate assembly 3 descends, and when the pull rod 42 moves to the lower limit switch 202, the detection plate assembly 3 is recovered, and the motor 43 is powered off to stop working.

In this embodiment, the detecting element 5 is disposed beside the guide sleeve 33 for detecting a change in position of the guide sleeve 33.

The guide post 21 and the guide sleeve 33 are matched, and a self-lubricating shaft sleeve or a linear bearing can be used for increasing the sensitivity of induction.

Example 2

Fig. 4 shows embodiment 2 of the present utility model, which has a similar structure to embodiment 1, except for the following point 2.

1. In this embodiment, the size of the connecting sleeve 32 is increased, the detecting element 5 is disposed on the end plate 321 at the lower end of the connecting sleeve 32, the normal condition limiting member 41 is always in contact with the end plate 321 under the action of the spring 101, the detecting plate assembly 3 is lifted to be in a working state, if the detecting plate assembly is pressed down by the pressing action of the cabin door, the limiting member 41 is separated from the end plate 321 of the connecting sleeve 32, and the detecting element 5 can be installed at the position for detecting the occurrence of unexpected conditions. 2. In this embodiment, the guide post 21 and the guide sleeve 33 may be replaced by a linear guide rail, which is fixed on two sides of the casing 2, and the detection plate assembly 3 is connected with the slider.

The advantages of this embodiment and embodiment 1 are:

1. the cabin door safety detection device body is installed below the swing floor 1, and is not obstructed from the connection of the cabin door safety detection device body in the same state as the normal connection of the cabin door safety detection device body.

2. The detection plate assembly 3 is lifted upwards in an electric mode and released from the swing floor 1, and the cabin door safety detection device can be switched to a cabin door monitoring working state; the cabin door safety detection device is kept in a monitoring working state by the elastic force of the spring 101, when the cabin door is pressed down, the cabin door presses down the detection plate assembly 3, the spring 101 is compressed, and meanwhile the detection element 5 sends out an emergency descending instruction, so that the boarding bridge floor can be descended in an emergency manner to avoid the cabin door of the airplane.

3. The cabin door safety detection device can convert the original manual operation of the cabin door safety detection device into an electric control operation mode, and can meet the requirement of unmanned operation of a boarding bridge.

4. The safety distance is increased; the distance of the aircraft due to unexpected sinking is limited, which is theoretically that the radius of the aircraft tire is subtracted by 32% -35% of the tire compression deformation, and the radius of the hub is subtracted. The safety shoe 6 for the boarding bridge is directly arranged between the swinging floor 1 and the gap of the cabin door of 15-20 cm, the safety shoe 6 has a certain rigid height h, no matter whether the aircraft accidentally bursts tires or the boarding bridge is accidentally lifted, the cabin door and the floor can be finally approached, the cabin door is not damaged by extrusion by the distance= (15-20) -h, and the detection plate assembly 3 of the cabin door safety detection device can be sunk to the same height as the swinging floor 1, so that the safety distance is greatly improved.

Example 3

Fig. 5 and 6 show embodiment 3 of the present utility model, and this embodiment and embodiment 2 have similar structures, differing in the following point 2.

1. A fixed bracket 22 is arranged in the casing 2, and the elastic device is a nitrogen spring 102 connected between the top plate 31 and the fixed bracket 22. The gas spring 101 can provide the upward force of the detection plate assembly 3, and the cylinder body and the piston cylinder have guiding functions. 2. The end plate 321 is provided with a through hole, the limiting piece 41 is connected with a chain 71 penetrating through the through hole downwards, a chain wheel 72 meshed with the chain 71 is rotatably installed in the machine shell 2, the driving device comprises a motor 43 arranged in the machine shell 2, the motor 43 is connected with a speed reducer 44, and an output shaft of the speed reducer 44 is connected with the chain wheel 72 through a worm and gear pair 45. The detection plate assembly 3 is released through the motor 43, the speed reducer 44 and worm gear transmission, the chain wheel 72 is coaxial with the worm gear, the state of the chain 71 is kept by utilizing the self-locking property of the worm gear transmission, the motor 43 rotates, the speed reducer 44 is used for reducing the speed to drive the worm to rotate, the worm drives the worm gear and the coaxial chain wheel 72 to rotate, and then the limiting piece 41 is pulled to move up and down through the chain 71, so that the lifting, the recovery and the reset of the detection plate assembly 3 can be realized.

In this embodiment, if the detecting plate assembly 3 is pressed by the cabin door to sink downwards, the guide block will be separated from the detecting element 5, the limiting piece 41 will be separated from the end plate 321 of the connecting sleeve 32, and the detecting element 5 sends an emergency bridge lowering command to the boarding bridge control system.

If a unidirectional bending chain is used as the chain 71, the chain 71 is limited by the chain outlet and the guide sleeve 33, and the guide block and the chain outlet section of the chain 71 are always kept in a vertical state.

The chain 71 can also adopt a common bidirectional chain 71 or a steel wire rope to complete the retraction and the release of the cabin door detection plate, and the chain wheel 72 is changed into a steel wire rope roller.

To ensure that the detecting element 5 can accurately and instantaneously detect the effect of the hatch, a spring 101 for separating the end from the stop 41 can be added. The detecting element 5 may also be equipped with a photoelectric sensor for noncontact distance detection under the door detecting plate, directly monitoring whether the position of the door detecting plate is changed.

Example 4

Fig. 7 shows embodiment 4 of the present utility model, and this embodiment and embodiment 3 have similar structures, except for the following point 1.

In this embodiment, the chain 71 is a unidirectional curved chain, a horizontal guide groove 23 is provided in the interior of the housing 2, the lower portion of the chain 71 is slidably mounted in the guide groove 23, and a compression spring 73 capable of driving the tail end of the chain 71 to move left and right in the guide groove 23 is mounted in the guide groove 23.

Example 5

Fig. 8 and 9 show embodiment 5 of the present utility model.

In this embodiment, the detecting plate assembly 3 includes a top plate 31, a lifting frame 35 fixed on the lower surface of the top plate 31, a motor bracket 26 and a scissor arm are disposed in the casing 2, a horizontal second guiding groove 351 is disposed on the lifting frame 35, and a horizontal first guiding groove 261 is disposed on the motor bracket 26. The scissor arm comprises a first connecting rod 81 and a second connecting rod 82, the middle part of the first connecting rod 81 is hinged with the middle part of the second connecting rod 82 to form an X-shaped structure, the upper end of the first connecting rod 81 is hinged with the lifting frame 35, the lower end of the first connecting rod 81 is connected with a first movable piece 83 capable of moving along the first guide groove 261, the lower end of the second connecting rod 82 is hinged with the motor bracket 26, and the upper end of the second connecting rod 82 is connected with a second movable piece 84 capable of moving along the second guide groove 351. The elastic means is connected with the second movable member 84 to drive the same to move towards the upper end of the first link 81, the limiting member 41 is movably mounted on the motor bracket 26 and can abut against the first movable member 83 to limit the minimum distance between the first movable member 83 and the lower end of the second link 82, and the driving means can drive the limiting member 41 to move left and right to adjust the maximum height of the upward lifting of the detection plate assembly 3.

Specifically, the elastic device is a tension spring 105 capable of driving the second movable member 84 to move towards the upper end of the first link 81, the driving device is a gear motor 48, an output shaft of the gear motor 48 is connected with a screw rod 93 which is transversely arranged, and the limiting member 41 is a translational nut meshed with the screw rod 93.

The first movable member 83 and the second movable member 84 are preferably rollers, and a slider may be used.

Under the action of the elastic force of the tension spring 105, the safety boot 6 is in a lifting state, the safety boot 6 is exposed above the swing floor 1 of the boarding bridge, and the cabin door of the airplane is directly monitored by the safety contact edge. When the cabin door descends outside the cabin door, the cabin door presses against the safety protection edge 61 of the safety boot 6, then the safety boot 6 sends a signal to the boarding bridge control system, and the boarding bridge control system sends a rapid descending instruction to the boarding bridge lifting system to drive the boarding bridge to descend in an emergency mode, so that the cabin door is prevented from being damaged due to collision with the floor of the boarding bridge.

Retraction of the safety shoe 6 is performed by a translational nut of the gear motor 48 and a screw rod 93, the translational nut moves leftwards, the first movable piece 83 is pushed to move leftwards, and the scissor arm can be lowered, so that the safety shoe 6 is retracted below the upper surface of the swing floor.

Compared with the embodiments 1-4, the embodiment also uses the traditional safety boot 6 as a detection element, almost does not change the original emergency avoidance procedure of the boarding bridge, and has simpler overall structure, simplicity and reliability.

The foregoing description of the preferred embodiments of the present utility model should not be construed as limiting the scope of the utility model, but rather should be understood to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the utility model as defined by the following description and drawings or any application directly or indirectly to other relevant art(s).

Claims (10)

1. The cabin door safety detection device is characterized by comprising a swing floor (1) and a machine shell (2), wherein the upper end part of the machine shell (2) is fixed on the swing floor (1), an opening (11) penetrating up and down is arranged on the swing floor (1), a detection plate assembly (3) is movably arranged at the opening (11), the detection plate assembly (3) is connected with an elastic device capable of driving the detection plate assembly to lift upwards through elastic force, a limiting piece (41) capable of limiting the maximum height of the detection plate assembly (3) to lift upwards is arranged in the machine shell (2), a driving device capable of driving the limiting piece (41) to move so as to adjust the maximum height of the detection plate assembly (3) to lift upwards is further arranged on the machine shell (2), a detection element (5) capable of monitoring the height position of the detection plate assembly (3) or a safety shoe (6) is arranged on the upper surface of the detection plate assembly (3), and a rubber cushion (91) is arranged on the upper surface of the swing floor (1).

2. A door safety inspection device according to claim 1, characterized in that the inspection board assembly (3) comprises a top board (31), a connecting sleeve (32) fixed on the lower surface of the top board (31), the limiting piece (41) is located inside the connecting sleeve (32) and can move up and down relative to the connecting sleeve (32), and an end board (321) capable of abutting against the limiting piece (41) is arranged at the lower end of the connecting sleeve (32).

3. The cabin door safety detection device according to claim 2, wherein a guide post (21) is fixed in the casing (2), a guide sleeve (33) matched with the guide post (21) is fixed on the lower surface of the top plate (31), the detection element (5) is used for monitoring the position change of the guide sleeve (33), the elastic device comprises a spring (101) sleeved on the guide post (21), the upper end of the spring (101) is abutted with the lower end face of the guide sleeve (33), and the lower end of the spring (101) is abutted with the inner bottom face of the casing (2).

4. A hatch door safety inspection device according to claim 2, characterized in that the end plate (321) is provided with a through hole, the limiting piece (41) is connected with a pull rod (42) penetrating through the through hole downwards, the driving device comprises a motor (43) arranged in the casing (2), the motor (43) is connected with a speed reducer (44), an output shaft of the speed reducer (44) is connected with the pull rod (42) through a screw pair or a rack-and-pinion pair, and an upper limit switch (201) capable of limiting the maximum stroke of upward movement of the pull rod (42) and a lower limit switch (202) capable of limiting the maximum stroke of downward movement of the pull rod (42) are arranged in the casing (2).

5. A hatch door safety detection device according to claim 2, characterized in that the detection element (5) is mounted on the end plate (321) and is adapted to monitor the distance change between the stop (41) and the end plate (321), between the stop (41) and the end plate (321) a spring (101) is arranged which can drive the two away from each other by means of an elastic force.

6. A door safety inspection device according to claim 2, characterized in that a fixed bracket (22) is provided in the housing (2), and the elastic means is a nitrogen spring (102) connected between the top plate (31) and the fixed bracket (22).

7. A hatch door safety inspection device according to claim 2, characterized in that the end plate (321) is provided with a through hole, the limiting piece (41) is connected with a chain (71) penetrating downwards through the through hole, a sprocket (72) meshed with the chain (71) is rotatably mounted in the casing (2), the driving device comprises a motor (43) arranged in the casing (2), the motor (43) is connected with a speed reducer (44), and an output shaft of the speed reducer (44) is connected with the sprocket (72) through a worm and gear pair (45).

8. The cabin door safety detection device according to claim 7, wherein the chain (71) is a unidirectional bending chain, a horizontal guide groove (23) is arranged in the casing (2), the lower part of the chain (71) is slidably mounted in the guide groove (23), and a pressure spring (73) capable of driving the tail end of the chain (71) to move left and right in the guide groove (23) is mounted in the guide groove (23).

9. A door safety inspection device according to claim 1, characterized in that the inspection plate assembly (3) comprises a top plate (31), a lifting frame (35) fixed on the lower surface of the top plate (31), a motor bracket (26) and a scissor arm are arranged in the machine shell (2), a horizontal second guide groove (351) is arranged on the lifting frame (35), a horizontal first guide groove (261) is arranged on the motor bracket (26), the scissor arm comprises a first connecting rod (81) and a second connecting rod (82), the middle part of the first connecting rod (81) is hinged with the middle part of the second connecting rod (82) to form an X-shaped structure, the upper end of the first connecting rod (81) is hinged with the lifting frame (35), a first movable piece (83) capable of moving along the first guide groove (261) is connected with the lower end of the second connecting rod (82), the upper end of the second connecting rod (82) is hinged with the motor bracket (26), the upper end of the second connecting rod (82) is connected with a second movable piece (84) capable of moving along the second guide groove (351) to the second movable piece (84), the limiting piece (41) is movably mounted on the motor bracket (26) and can be abutted with the first movable piece (83) to limit the minimum distance between the first movable piece (83) and the lower end part of the second connecting rod (82), and the driving device can drive the limiting piece (41) to move left and right to adjust the maximum height of the upward lifting of the detection plate assembly (3).

10. The cabin door safety detection device according to claim 9, wherein the elastic device is a tension spring (105) capable of driving the second movable member (84) to move towards the upper end of the first connecting rod (81), the first movable member (83) and the second movable member (84) are rollers, the driving device is a gear motor (48), an output shaft of the gear motor (48) is connected with a screw rod (93) which is transversely arranged, and the limiting member (41) is a translational nut meshed with the screw rod (93).