Passenger and drop device

Abstract

The invention provides a boarding and alighting device, which can be hung on and removed from a cab of a driving simulator regardless of the state of a floor surface on which the driving simulator is arranged, and can be safely boarded and alighting by a driver. A boarding / alighting device for boarding / alighting to a moving body simulator, the boarding / alighting device being provided with: a bridge provided with a telescopic mechanism; a driving device for driving the telescoping mechanism; and a platform to which the bridge is fixed. The bridge has a cantilever beam structure and is provided with a telescopic support device for supporting the free end side of the cantilever beam, i.e., the front end of the bridge.

Description

Technical Field

[0001] The present invention relates to a boarding and disembarking device, and in particular to a boarding and disembarking device for a cockpit of a simulator. Background Art

[0002] In the past, as an example of a simulator, for example, a driving simulator described in Patent Document 1 changes the posture of a simulated vehicle body relative to a floor surface by a servo cylinder. By combining the change in the posture of the simulated vehicle body (cockpit) relative to the floor surface with an image projected onto a screen by a projector, it is possible to simulate a situation where a driver riding in the simulated vehicle body drives a car.

[0003] However, in order to make the behavior of the vehicle body closer to reality and the driving feeling of the driver closer to reality, it is preferable to set the actuator that imparts posture changes to the cockpit to a higher stroke.

[0004] Patent Document 2 describes a driving simulator including an actuator with a long stroke.

[0005] Prior art literature

[0006] Patent Literature

[0007] Patent Document 1: Japanese Patent No. 4493575

[0008] Patent Document 2: Japanese Patent No. 5813706 Summary of the invention

[0009] Problems to be solved by the invention

[0010] However, in the case of a driving simulator based on such a high-stroke actuator, the height of the cockpit from the floor surface is relatively high. In this case, a ladder-shaped boarding and alighting device is considered for the driver to get on and off the cockpit. However, since there are drive mechanisms such as actuators and hydraulic pipes on the floor surface, when the ladder is set in the cockpit, it will interfere with the drive mechanism, and it is difficult to ensure the installation position of the ladder. In addition, during the simulation, it is necessary to remove the ladder from the installation position. Therefore, in order to get on and off the cockpit without relying on drive mechanisms such as actuators and hydraulic pipes on the floor surface, the boarding and alighting device can be in the form of a bridge, but in this case, the bridge twists or bends, and it is difficult for the driver to get on and off the cockpit safely.

[0011] Therefore, an object of the present invention is to provide a boarding and alighting device which can be hung on and removed from a cockpit of a driving simulator regardless of the state of a floor surface on which the driving simulator is installed, and which allows a driver to board and alight safely.

[0012] Solutions to Solve Problems

[0013] In order to solve the above-mentioned problems, a boarding and alighting device is provided, which is a boarding and alighting device for boarding and alighting to a mobile body simulator, and is characterized in that it comprises: a bridge, which has a telescopic mechanism; a driving device, which drives the telescopic mechanism; and a platform, to which the bridge is fixed, and the bridge is a cantilever beam structure and has a telescopic supporting device for supporting the free end side of the cantilever beam, i.e., the front end of the bridge.

[0014] Furthermore, the above-mentioned boarding and descending device may be configured such that the above-mentioned bridge includes a plurality of bridges, and the above-mentioned telescopic mechanism is a mechanism in which the plurality of bridge members are housed in a nested structure and are extended and deployed to each other during use.

[0015] Furthermore, in the above-mentioned boarding and descending device, the above-mentioned telescopic mechanism may further include a ball screw and a linear guide.

[0016] In addition, the above-mentioned boarding and descending device may be configured such that the above-mentioned telescopic mechanism is composed of a pop-up bridge.

[0017] Furthermore, the above-mentioned boarding and descending device may be configured such that the above-mentioned telescopic mechanism is constituted by a rotating bridge.

[0018] In addition, the above-mentioned boarding and descending device may also be that the above-mentioned retractable supporting device is a supporting jack having supporting legs.

[0019] In addition, the above-mentioned boarding and descending device may also be that the above-mentioned support legs are composed of ball screws.

[0020] In addition, the above-mentioned boarding and descending device may also be that the above-mentioned supporting legs are composed of trapezoidal screws.

[0021] Furthermore, the above-mentioned boarding and descending device may be configured such that the above-mentioned supporting device includes foldable supporting legs.

[0022] In addition, the above-mentioned boarding and descending device may also be that the above-mentioned supporting jack is a hydraulic jack.

[0023] In addition, the above-mentioned boarding and descending device may be, and the structure of the above-mentioned bridge may be a truss structure.

[0024] Effects of the Invention

[0025] According to the present invention, it is possible to provide a boarding and alighting device which can be hung on and removed from a cockpit of a driving simulator regardless of the state of a floor surface on which the driving simulator is installed, and on which a driver can board and alight safely. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of a driving simulator according to an embodiment of the present invention.

[0027] Figure 2 (a) and (b) respectively represent a boarding and alighting device according to an embodiment of the present invention. Figure 1A schematic top view and a schematic side view showing the positional relationship of the cockpit.

[0028] Figure 3A (a) and (b) are schematic perspective views showing states of a corridor of a boarding and alighting device according to an embodiment of the present invention.

[0029] Figure 3B (c) is a schematic perspective view showing a state of a corridor of the boarding and alighting device according to the embodiment of the present invention.

[0030] Figure 4 (a) and (b) are schematic perspective views showing the extended state of the support legs of the jacking jack according to the embodiment of the present invention.

[0031] Figure 5 It is a top view of a covered bridge showing a boarding and descending device according to an embodiment of the present invention.

[0032] Figure 6 (a) and (b) are respectively an enlarged plan view and a schematic perspective view of a jack position displacement plate of a boarding and descending device according to an embodiment of the present invention.

[0033] Figure 7 (a) and (b) are respectively an enlarged plan view and a schematic perspective view of a jack position displacement plate of a boarding and descending device showing another embodiment of the present invention.

[0034] In the figure:

[0035] 100—driving simulator; 110—cockpit; 120—actuator system; 121a, 121b, 121c—actuators; 130—screen; 140—bridge; 141—opening for boarding and alighting; 142—entrance door; 143—bridge; 143a—first bridge; 143b—second bridge; 143c—third bridge; 144—jack position displacement plate; 144a, 144b—scale holes; 144c—pin; 145—arc-shaped through hole; 150—platform; 160—pit; 170—support jack. DETAILED DESCRIPTION

[0036] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0037] Figure 1 It is a perspective view showing the structure of a driving simulator 100 according to one embodiment of the present invention.

[0038] like Figure 1As shown, the driving simulator 100 is configured to include: a cockpit 110; an actuator system 120 that moves the cockpit; a screen 130 that is used to reflect the scenery seen from the cockpit according to the movement of the cockpit; a corridor 140 that is a boarding and disembarking device relative to the cockpit; a platform 150 that is provided with a boarding and disembarking device and is used for the driver to board and disembark; and a concave pit 160 that is equipped with the actuator system 120 and has a bottom surface lower than the platform (see Figure 2 (b)). In addition, this embodiment relates to a simulator of a car as the driving simulator 100, but is not limited thereto. For example, as will be understood from the following description, it can be used as a simulator of a mobile body such as a railway vehicle or an airplane.

[0039] The cockpit 110 is a simulated riding part for the driver to ride and drive, and is equipped with a steering wheel, seats, instrument panel, door mirrors, doors, and other structures for simulating the driving of an actual car. The corridor (boarding and disembarking device) 140 for the driver to board and disembark from the cockpit 110 is set on the platform 150. The details will be described later. When the driver boards and disembarks, the corridor is extended as a whole, and its front end becomes a position corresponding to the boarding and disembarking port of the cockpit 110 ( Figure 1 ). And, in this state, a pair of support legs provided on the lower surface of the front end of the corridor bridge 140 extend into the pit 160 where the actuator system 120 is provided and contact the floor surface. Thus, the front end of the corridor bridge 140 is supported by the support legs. In addition, when no simulation is performed, the corridor bridge 140 is in a state where the support legs are retracted and the entirety is retracted and located on the platform 150 (refer to (a) of FIG. 3 ). That is, when using the driving simulator 100, first, the corridor bridge 140 is extended to a state where the front end thereof corresponds to the position corresponding to the boarding and alighting opening of the cockpit. Next, the driver opens the entrance door 142 on the near front side of the corridor bridge 140 on the platform 150 and boards the corridor bridge, follows the safety gate 146 to reach the boarding and alighting opening 141, and boards the cockpit 110 through the opening. After using the driving simulator 100, the driver moves from the cockpit 110 to the corridor 140 through the boarding and disembarking opening 141 at the front end of the corridor 140, and moves to the platform 150 through the entrance door 142 located on the platform 150 side of the corridor 140. Then, the corridor 140 is retracted to the storage state.

[0040] Figure 2 (a) and (b) represent Figure 1 The top view and side view show the positional relationship between the corridor bridge 140 and the cockpit 110.

[0041] like Figure 2As shown in (a), the corridor bridge 140 is extended from the platform 150 so that the front end thereof reaches a position adjacent to the cockpit 110. At this time, the corridor bridge 140 extends toward the cockpit 110 stopped at a predetermined stop position without contacting the cockpit 110. In addition, the door 115 of the cockpit 110 opens toward the boarding and disembarking opening 141 at the front end of the corridor bridge 140, thereby ensuring a path for the driver to board and disembark from the corridor bridge 140 to the cockpit 110. In addition, since the corridor bridge 140 does not contact the cockpit 110, the weight of the corridor bridge 140 and the impact during extension and retraction will not be applied to the cockpit 110, and will not affect the cockpit 110 and the actuator system 120 described later.

[0042] In addition, if Figure 2 As shown in (b), the structure is such that when the corridor bridge 140 is extended, the bottom surface of the corridor bridge 140 and the bottom surface of the cockpit 110 are at the same height. In this way, even if the height of the cockpit 110 from the floor where the actuator system 120 is installed to the cockpit 110 is relatively high, by using the corridor bridge 140 of this embodiment, the corridor bridge 140 can be easily installed in the cockpit 110, and it can also be removed. In addition, since the driver can get on and off the cockpit 110 on foot on the corridor bridge 140, it is possible to move in the same way as an actual vehicle that is boarded on foot on the ground, and a high sense of immersion can be obtained.

[0043] Reference Figure 1 , Figure 2 (b), the actuator system 120 has three actuators 121a, 121b, and 121c that are evenly separated and arranged at three locations along the circumferential direction in a manner surrounding the cockpit 110. Parts of these three actuators can be retracted in their respective axial directions, and are connected to a swing base 111 fixed to a cockpit support platform via a hexapod 124, and the cockpit support platform is provided on the bottom side of the cockpit 110. In addition, the hexapod 124 is fixed to a fixed platform 126. Thus, the actuator system 120 can drive the actuators 121a, 121b, and 121c through a driving source such as hydraulic pressure, so that the cockpit 110 moves in the X and Y axis directions. In addition, through the hexapod 124, the cockpit 110 can move in six degrees of freedom in the three-axis directions of X, Y, and Z and the rotation directions around each of these axes. The operation of the cockpit based on these actuators 121a, 121b, 121c and the hexapod 124 is controlled by a host computer (not shown).

[0044] The screen 130 is installed above the pit 160 so as to surround the cockpit 110, and projects images by a projector (not shown) suspended from the ceiling. In order to avoid the driving sources, hydraulic pipes, etc. of the actuators 121a, 121b, and 121c installed on the floor surface of the pit 160, the screen 130 is located at a predetermined height from the floor surface of the pit.

[0045] When receiving image signals from a computer (not shown), the projector projects images of scenery seen from inside the vehicle when driving on a simulated driving road, i.e., simulated images, onto the screen 130 based on the image signals. The driver obtains information on the driving road, signs, traffic lights, other vehicles, pedestrians, etc. while observing the simulated images projected on the screen 130, and performs driving operations according to the information.

[0046] Among them, the three actuators 121a, 121b, 121c, the hexapod 124 and other driving mechanisms are provided. In particular, when the actuator of the hexapod 124 has a relatively high stroke, the height of the cockpit 110 provided on the upper side of the hexapod 124 becomes relatively high. Therefore, in this embodiment, the above-mentioned driving mechanism is provided in the pit that is a recessed portion relative to the platform. In addition, it is configured so that boarding and disembarking to the cockpit 110 are performed using the corridor bridge 140 by providing the pit, and the corridor bridge 140 provided on the platform is retractable relative to the cockpit 110.

[0047] The platform 150 is a scaffold for the driver to enter the room where the driving simulator 100 is installed and get on the upper part of the corridor 140. The platform 150 is made of concrete, for example, and has a horizontal floor surface at the upper part. In addition, the aforementioned pit 160 is provided in the center of the platform 150.

[0048] The covered bridge 140 is fixed to the platform 150 via a base 180. The base 180 is fixed by being embedded in the platform 150 when laying concrete constituting the platform 150. In addition, the base 180 is supported on the floor surface of the pit 160 by fixing legs 181.

[0049] Figure 3A (a), (b) and Figure 3B (c) is a diagram for explaining the covered bridge 140 according to the present embodiment.

[0050] Figure 3A(a) is a three-dimensional diagram showing the storage state of the corridor bridge 140 of the embodiment of the present invention. In this embodiment, the corridor bridge 140 has a structure formed by connecting rectangular frames that also serve as safety barriers 146, namely a bridge 143. The bridge 143 has a plurality of bridges, which are composed of a first bridge 143a, a fixed part to the platform 150, a second bridge 143b, a middle part, and a third bridge 143c, a front end. In addition, the bridge has a telescopic mechanism, and when in use, the first bridge 143a, the second bridge 143b, and the third bridge 143c are extended and unfolded relative to each other, and in contrast, they are contracted and stored relative to each other. The first bridge 143a of the corridor bridge 140 is fixed to a fixed platform, namely a base 180, for fixing to the platform 150. Through the telescopic mechanism, when the corridor bridge 140 is in the storage state, the first bridge 143a, the second bridge 143b, and the third bridge 143c are contracted to form a nested structure with each other, so that they are stored as a whole on the base 180. In addition, for example, the bridge 143 may also be a truss structure. If the bridge 143 is a truss structure, the rigidity of the bridge 143 can be fully ensured during the extension and expansion state, and the extension and contraction of the bridge 143 and the extension and contraction of the support legs 172 described later will not be hindered.

[0051] Figure 3A (b) is a stereoscopic diagram showing the state of the corridor bridge 140 of the embodiment of the present invention being deployed in the middle of use. From the aforementioned storage state, the telescopic mechanism, i.e., the first telescopic motor 148a, which is a driving device for driving the telescopic mechanism, is used to rotate the telescopic mechanism, i.e., the first telescopic ball screw 148b, thereby the third bridge 143c is extended and deployed along the telescopic mechanism, i.e., the first telescopic linear guide 148c, relative to the first bridge 143a in the direction of the cockpit 110. In addition, at the same time, by rotating the second telescopic ball screw 149b using the second telescopic motor 149a, the second bridge 143b is extended and deployed along the second telescopic linear guide 149c relative to the first bridge 143a in the direction of the cockpit 110. In this way, since the telescopic mechanism is composed of a ball screw, the speed of extension and retraction can be increased compared to the case of using other screws. In addition, as described above, the corridor bridge 140 becomes a nested structure in which the first bridge 143a, the second bridge 143b, and the third bridge 143c move and retract relative to each other. Thus, the corridor bridge 140 only extends toward the cockpit 110, and collision with the cockpit 110, the screen 130 and other peripheral equipment can be prevented. In addition, due to such a nested structure, the number of parts is small and simple compared to the case where the bridge is telescopic in an accordion-type or a telescopic type, and the installation of the safety barrier is easy.

[0052] Figure 3B(c) is a perspective view showing the bridge 140 of the embodiment of the present invention when fully deployed. The second bridge 143b and the third bridge 143c are fully deployed in the extension direction relative to the first bridge 143a. In this state, as described below, in order to support the front end of the bridge 140, the support leg 172 extends from the storage portion 171 of the top support jack 170 relative to the floor surface of the pit 160.

[0053] When the driving simulator 100 is used, the corridor bridge 140 is retracted and stored toward the platform 150 in the reverse order of the extension and deployment of the corridor bridge 140 toward the cockpit 110 .

[0054] In addition, in the present embodiment, the corridor bridges 140 are stored in a nested structure, but are not limited to this. The corridor bridge having a bridge of the same length as the distance from the platform 150 to the cockpit 110 may also be a pop-up bridge that is popped up and located above the platform 150 and becomes stationary. In addition, instead of popping up, it may be a rotating bridge whose front end draws an arc track when viewed from above and rotates toward the platform 150 to become stationary. In addition, the integrally constructed bridge may also move directly to the vicinity of the cockpit 110, and also directly return to the platform 150.

[0055] In this way, the corridor bridge 140 is stored in a nested structure and unfolded in the extension direction. Furthermore, the front end of the corridor bridge 140 has the support leg 172 as described above. As a result, the corridor bridge 140 can be extended toward the cockpit 110 without being hindered by the actuators 121a, 121b, 121c, hydraulic pipes, etc. along the floor surface of the pit 160. Therefore, regardless of the state of the floor surface where the driving simulator is installed, the corridor bridge 140 can be hung on the cockpit 110 and can be removed.

[0056] In addition, as described above, if the corridor bridge is stored in a pop-up or rotating manner, it is not necessary to make the bridge portion of the corridor bridge into a nested structure, and the corridor bridge can be hung on the cockpit 110 with a simple mechanism. In addition, in the case where the integrally structured bridge itself directly moves to the vicinity of the cockpit 110 and directly returns to the platform 150, the same effect can be obtained.

[0057] <Jack support>

[0058] Figure 4 (a) and Figure 4 (b) is an enlarged perspective view showing details of the top support jack 170 of the covered bridge 140 according to the embodiment of the present invention.

[0059] Figure 4(a) is an enlarged stereoscopic view showing a state in which the support leg 172 of the supporting jack 170, which is a retractable support device of the corridor bridge 140, is stored in the storage section 171. As described above, the support leg 172 maintains the state of being stored in the storage section 171 until the corridor bridge 140 is fully unfolded. The support leg 172 has a leg portion 172a composed of a ball screw. A jack motor 173 is installed on a drive shaft 174 for retracting the support leg 172 via a gear (not shown). As a result, when the jack motor 173 does not rotate, the support leg 172 can remain stationary relative to the storage section 171 through the friction between the leg portion 172a and the storage section 171, and the friction between the gear of the jack motor 173 and the drive shaft 174. In addition, the jack motor 173 can be kept powered on, and the holding torque of the jack motor 173 can be used to maintain the stationary state.

[0060] Figure 4 (b) is an enlarged stereoscopic view showing a state in which the support leg 172 is extended and reaches the floor surface in the pit 160 from the storage section 171. When the corridor bridge 140 is unfolded, the jack motor 173 starts to rotate from the aforementioned static state, and the driving force is transmitted to the gear, the drive shaft 174, and the leg 172a. As a result, the ball screw, i.e., the support leg 172, extends from the storage section 171 to the floor surface in the pit. The support leg 172 has a foot 172b, and when the foot 172b contacts the floor surface in the pit, the jack motor 173 stops rotating. The support leg 172 remains stationary relative to the storage section 171 through the meshing friction between the ball screw, i.e., the leg 172a, and the storage section 171 cut with an internal thread corresponding to the ball screw. Therefore, the corridor bridge 140 is supported by the support leg 172. Thus, the free end side, i.e., the front end portion, of the cantilever beam structure, i.e., the corridor bridge 140, is supported and fixed, and the corridor bridge 140 does not twist or bend, so that the driver can safely approach the cockpit 110 using the corridor bridge 140, and can also safely board. Moreover, since the leg portion 172a is composed of a ball screw, the leg portion 172a can quickly respond to the rotation of the jack motor 173 and quickly extend and retract. In addition, as described above, the state of powering the jack motor 173 can also be maintained, and the holding torque of the jack motor 173 can be used to hold the extended support leg 172.

[0061] As mentioned above, in the present embodiment, the top support jack 170 having a ball screw, i.e., the support leg 172, is used, but the support leg is not limited thereto. For example, a trapezoidal screw or a worm gear may also be used. In addition, the support device may be such that the support leg is foldable and is folded when the support leg is stored. In addition, the top support jack 170 may also be composed of a hydraulic jack. Even when such a support device is used, the support leg can be quickly extended and retracted.

[0062] <Jack Position Displacement Plate>

[0063] Figure 5 This is a top view of the covered bridge 140 as viewed from above.

[0064] Figure 6 (a) and Figure 6 (b) is an enlarged view showing the jack position displacement plate 144.

[0065] like Figure 5 As shown, the covered bridge 140 is provided with a jack position displacement plate 144 at the front end of the third bridge 143c. The jack position displacement plate 144 is used to allow the top support jack 170 to rotate within a plane relative to the third bridge 143c.

[0066] like Figure 6 As shown in (a), the jack position displacement plate 144 side is provided with scale holes 144a, 144b and an arc-shaped through hole 145 for determining the rotation position of the supporting jack 170 in the plane. In addition, on the third bridge 143c side, a screw hole is opened at a position corresponding to the arc-shaped through hole 145, and a pin 144c is screwed into it. The pin 144c protrudes from the third bridge 143c and can be visually confirmed through the arc-shaped through hole 145, playing a guiding role for rotating the jack position displacement plate 144 on the arc. In addition, when the pin 144c reaches the end of the arc-shaped through hole 145, the rotation of the jack position displacement plate 144 stops, and it is also an end limiter for the left and right rotation of the jack position displacement plate 144.

[0067] The rotation position of the top support jack 170 in the plane using the jack position displacement plate 144 is determined by aligning the aforementioned scale holes 144a, 144b and the pin 144c. Specifically, the scale holes 144a, 144b and the pin 144c are adjusted to a position where the line L1 passing through the center axis of the jack motor 173 in a top view coincides with the line L2 passing through the center of the bridge 140 in a top view, so that the jack position displacement plate 144 is brought to a position corresponding to the bridge 140. The rotation of the jack position displacement plate 144 is performed manually, but it can also be automatically rotated using a motor, for example.

[0068] In this way, the jack position displacement plate 144 having the supporting jack 170 rotates to a predetermined position relative to the third bridge 143c. Figure 6 As shown in (b), the support leg 172 of the top jack 170 can smoothly avoid the actuators 121a, 121b, 121c, hydraulic pipes, etc. laid on the floor surface in the pit and contact the floor surface in the pit.

[0069] Figure 7 (a) is an enlarged top view showing the jack position displacement plate 144, Figure 7 (b) is a schematic perspective view showing the orientation of the jacks displaced by the jack position displacement plate 144 according to another embodiment of the present invention. Configurations having the same reference numerals as those related to the aforementioned covered bridge 140 have the same functions, and thus detailed descriptions thereof are omitted.

[0070] like Figure 7 As shown in (a), when the jack position displacement plate 144 is rotated to the left, the pin 144c reaches the right end of the arc-shaped through hole 145, and the pin 144c hits the right end of the arc-shaped through hole 145, and the rotation of the jack position displacement plate 144 stops. As a result, the jack position displacement plate 144 can be rotated to the left relative to the third bridge 143c from the above position.

[0071] like Figure 7 As shown in (b), as mentioned above, by rotating the jack position displacement plate 144 to a predetermined position, the support leg 172 can avoid interference with the actuators 121a, 121b, 121c and the hydraulic pump laid along the floor surface in the pit and contact the floor surface in the pit.

[0072] According to the above-described configuration, it is possible to provide a boarding and alighting device that can be hung on and removed from the cockpit of a driving simulator regardless of the state of the floor surface on which the driving simulator is installed, and that allows the driver to board and alight safely.

Claims

1. A boarding and disembarking device, which is used for boarding and disembarking on a mobile body simulator, The alighting and boarding device is characterized in that it comprises: A bridge having a telescopic mechanism; a driving device, which drives the telescopic mechanism; and a platform to which the bridge is fixed, The bridge has a cantilever beam structure and includes a telescopic support device for supporting the free end side of the cantilever beam, that is, the front end of the bridge.

2. The boarding and disembarking device according to claim 1, characterized in that: The bridge includes a plurality of bridges, and the telescopic mechanism is a mechanism that stores the plurality of bridges in a nested structure and extends and expands relative to each other when in use.

3. The boarding and disembarking device according to claim 2, characterized in that: The telescopic mechanism further includes a ball screw and a linear guide.

4. The boarding and disembarking device according to claim 1, characterized in that: The telescopic mechanism is composed of a spring-type bridge.

5. The boarding and disembarking device according to claim 1, characterized in that: The telescopic mechanism is composed of a rotating bridge.

6. The boarding and disembarking device according to claim 1, characterized in that: The telescopic support device is a top support jack with support legs.

7. The boarding and disembarking device according to claim 6, characterized in that: The supporting legs are formed by ball screws.

8. The boarding and disembarking device according to claim 6, characterized in that: The supporting legs are formed by trapezoidal lead screws.

9. The boarding and disembarking device according to claim 1, characterized in that: The support device is provided with foldable support legs.

10. The boarding and disembarking device according to claim 6, characterized in that: The top support jack is a hydraulic jack.

11. The boarding and disembarking device according to claim 1, characterized in that: The structure of the bridge is a truss structure.

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