Transportation device for vehicles to quickly get on and off viaduct and using method of transportation device

Abstract

The invention discloses a transportation device for a vehicle to quickly get on and off a viaduct and a using method thereof.The transportation device comprises an erecting part, a supporting arm part and a platform part, and under the action of a first hydraulic part, erecting arms in the erecting part can rotate relative to the upper end of a moving body on the basis of parallel stacking; under the action of the second hydraulic part, the adjacent supporting arms in the supporting arm part can be stacked in parallel during transportation and can be unfolded into a straight line for butt joint during use; under the action of the traction component, the supporting arm group can rotate relative to the erecting arm on the basis of parallel stacking; a platform body in the platform component can be stacked on the supporting arm in parallel and rotate to be parallel to the ground or the bridge floor. The folding and unfolding device can be rapidly unfolded and folded on the ground or a viaduct, the supporting arms are in lap joint with the viaduct or the ground during unfolding, rapid transportation of vehicles between the ground and the viaduct is achieved, the overall occupied space can be reduced after folding, and the overall maneuverability is improved.

Description

Technical Field

[0001] The invention relates to the technical field of vehicle transfer, and in particular to a transportation device for vehicles to quickly go up and down an elevated bridge and a use method thereof. Background Art

[0002] A viaduct is a bridge structure built above the ground to carry the passage of vehicles such as roads. As an efficient mode of transportation, viaducts can transfer traffic from the ground to the air, reduce ground traffic congestion, improve the convenience and smoothness of urban transportation, and become an important part of the road transportation network of large and medium-sized cities.

[0003] There is often a certain distance between adjacent entrances or exits on an elevated bridge. When vehicles are severely congested, or encounter an emergency, or are damaged during wartime, vehicles lack an effective path and cannot quickly get on and off the elevated bridge at any time, resulting in a bridge trap.

[0004] At present, there are few special devices used to ensure that vehicles can quickly go up and down viaducts at home and abroad. The methods of transporting vehicles up and down viaducts are: 1. Direct lifting by large helicopters, but it is difficult for a single helicopter to lift a heavy vehicle of about 30 tons, the cost is high, and the efficiency of multiple helicopters working together is low; 2. The use of building up and down bridge ramps has high requirements for the site, and the huge impact force on the bridge when going up and down steep slopes is not feasible. For example, a viaduct with a climbing gradient of 60% and a height of 10m requires at least 17m of ground space; 3. Using traditional cranes for lifting or large-tonnage aerial work vehicles for vertical transportation, on the one hand, the lifting operation efficiency is low and the safety risk is high; on the other hand, after cranes and aerial work vehicles lift other vehicles on the ground or on the viaduct, they cannot quickly go up and down to the viaduct or the ground, especially in special circumstances such as wartime or emergency rescue, they cannot continue to maneuver with the convoy and can only ensure one-time tasks, resulting in great limitations in use. Summary of the invention

[0005] The purpose of the present invention is to provide a transportation device for vehicles to quickly go up and down an elevated bridge, which can be used on the ground and on the bridge deck. After unfolding, the vehicle can be transported up and down between the ground and the elevated bridge. The transportation efficiency is high and it is suitable for vehicles of different weights and bridge decks of different heights. After folding, the overall occupied space can be reduced and the overall maneuverability can be improved.

[0006] To achieve the above-mentioned purpose, the present invention provides a transport device for vehicles to quickly go up and down a viaduct, comprising a mounting component located on a mobile body, having a mounting arm;

[0007] The erection arm rotates between being parallel and stacked on the mobile body and forming an obtuse angle with the mobile body;

[0008] The arm assembly comprises a supporting arm group;

[0009] The support arm group is detachably connected to the erection arm and rotates between being stacked in parallel on the erection arm and forming an obtuse angle with the erection arm; the support arm group has at least two support arms, and adjacent support arms perform switching movements between being stacked in parallel and being connected in a straight line;

[0010] The platform component comprises a platform body rotatably mounted on a base plate seat;

[0011] The base plate seat is driven to move and is located on the support arm group, and the platform body can be stacked on the support arms in parallel and rotated to be parallel to the ground or the bridge deck.

[0012] In some examples of the present invention, when the number of the support arms is two, the two support arms are connected in a " / \" structure, and switch between parallel stacking and linear docking based on the downward angle;

[0013] The front support arm is connected to the rear end of the erection arm in a rotatable and detachable manner.

[0014] In some examples of the present invention, when the number of the support arms is three, the three support arms are connected in a "\ / \" structure;

[0015] The front support arm and the middle support arm switch between parallel stacking and straight-line docking based on the upward angle; the middle support arm and the rear support arm switch between parallel stacking and straight-line docking based on the downward angle;

[0016] Wherein, a support seat which is driven to move is arranged on the erection arm, and the support arm on the front side is rotated and detachably connected to the support seat.

[0017] In some examples of the present invention, the arm member is driven to rotate on the erection arm by a traction member;

[0018] The traction component comprises a drum, a roller, and a traction rope;

[0019] The reel is located on the mobile body and is driven to rotate;

[0020] The roller is rotatably mounted on the front end of the erection arm;

[0021] One end of the traction rope is rolled up on the drum, and the other end is wound around the outer side of the roller and then connected to the support arm group.

[0022] In some examples of the present invention, the erection component further comprises a first hydraulic component, the tail end of the first hydraulic component is movably mounted on the mobile body, and the telescopic end is rotatably connected to the erection arm;

[0023] A second hydraulic component is movably installed between adjacent support arms, and is driven by the second hydraulic component to perform switching movement between parallel stacking and linear docking;

[0024] The platform component also includes a third hydraulic component, the tail end of which is movably installed on the bottom plate seat, and the telescopic end is rotatably connected to the platform body.

[0025] In some examples of the present invention, adjacent support arms are provided with fixed circular wheels at the rotational positions, and the fixed circular wheels are fixedly connected to one of the support arms;

[0026] The second hydraulic component is rotatably mounted on the other support arm, and the output end is connected to one end of the transmission chain plate; the other end of the transmission chain plate is wound around the circumference of the fixed round wheel and then fixedly connected to the fixed round wheel;

[0027] When the second hydraulic component is in tension, adjacent support arms are butted in a straight line.

[0028] In some examples of the present invention, a rotating plate is rotatably mounted on the rear end of the erection arm;

[0029] When the support arm group includes two support arms, both ends of the support arm group can be detached and assembled on the rotating plate through a latch;

[0030] When the support arm group includes three support arms, one end of the front support arm is detachably mounted on the rotating plate through a latch, and the rotating plate is rotatably mounted on the support seat.

[0031] In some examples of the present invention, a rack and a guide rail are arranged on the support arm along the length direction;

[0032] The bottom end of the base plate is provided with a slide seat matched with the guide rail, and the top end is provided with a driving member; the driving member is meshed and connected with the rack through a gear assembly;

[0033] Among them, when the support arm group is unfolded, the racks and guide rails on adjacent support arms can be connected in a straight line.

[0034] In some examples of the present invention, a rotating platform whose rotation is controlled is provided at the upper end of the mobile body, and the rotation axis is arranged vertically;

[0035] The erection components are mounted on a rotating platform;

[0036] The platform body is provided with a level sensor connected to the controller;

[0037] After receiving the signal from the level sensor, the controller controls the third hydraulic component to adjust the level of the platform body.

[0038] The purpose of the present invention is to provide a method for using a transportation device for quickly getting vehicles on and off an elevated bridge. By stacking the erection arms and the support arm groups in parallel and unfolding the support arm groups into a straight line for docking, the device can be quickly unfolded and folded on the ground or on an elevated bridge. When unfolded, the support arms are overlapped on the elevated bridge or the ground, so that the vehicle can be quickly transported between the ground and the elevated bridge. When folded, the overall occupied space can be reduced and the overall maneuverability can be improved.

[0039] A method for using a transportation device for quickly getting vehicles on and off an elevated bridge, characterized in that it specifically comprises the following steps:

[0040] S1, when initially folded, the platform body is stacked in parallel on the uppermost support arm, two or three support arms are stacked in parallel up and down on the erection arm, and the erection arm is stacked in parallel on the mobile body;

[0041] S2, when the transport device is located on the ground or on the bridge deck to transport vehicles up and down, the mobile body is located at a suitable position, the first hydraulic component is activated, so that the erection arm drives the support arm group to initially rotate a certain angle relative to the mobile body, and at the same time the traction component and the second hydraulic component are actuated, the support arm group rotates a certain angle relative to the erection arm, and the two or three support arms change from a parallel stacking state to a straight-line docking state, and finally the two or three support arms docked in a straight line are overlapped on the viaduct to complete the overall deployment;

[0042] S4, when the overall deployment is completed, the erection arm and the traction component are disassembled and separated from the support arm group, and the support arm group is deployed to support independently, and the third hydraulic component drives the platform body to rotate relative to the bottom plate seat, and the bottom plate seat moves on the support arm group, so that the platform body can dock with the elevated bridge deck or the ground, and the vehicles on the ground can be transported upward to the elevated bridge deck through the platform body, or the vehicles on the elevated bridge deck can be transported downward to the ground through the platform body;

[0043] S5, after the transportation of the vehicle up and down the viaduct is completed, the erection arm and the traction component are installed and connected from the support arm group, the platform body is stacked in parallel on the uppermost support arm, two or three support arms are stacked in parallel on the erection arm, and the erection arm is stacked in parallel on the moving body, and the transport device is in a folded state again;

[0044] S6, when there are two supporting arms and the supporting arm group is fully unfolded and overlapped between the ground and the bridge deck, the erection arm on the mobile body is first disassembled and separated from one end of one supporting arm, and then moved to the bridge deck or the ground through the platform body, and the erection arm on the mobile body is then installed and connected with one end of the other supporting arm.

[0045] The platform body is stacked in parallel on the uppermost supporting arm, the two supporting arms are stacked in parallel on the erecting arms, and the erecting arms are stacked in parallel on the moving body, so as to complete the folding of the transport device and the transport of the upper and lower viaducts.

[0046] Compared with the prior art, the present invention is a transportation device for vehicles to quickly go up and down the viaduct. The erection arms are rotated relative to the upper end of the moving body on the basis of parallel stacking, and the support arm group is rotated relative to the erection arms on the basis of parallel stacking. Adjacent support arms can be stacked in parallel and unfolded into a straight line for docking, so that the device can be quickly unfolded and folded on the ground or viaduct. When unfolding, the support arms are overlapped on the viaduct or the ground, and the platform body receives the corresponding vehicles, so that the vehicles can be quickly transported between the ground and the viaduct. When folding, the erection arms and the support arm group are stacked in parallel, so that the overall occupied space is reduced and the overall mobility is improved.

[0047] When the other two support arms are rotated and connected to form a " / \" structure, the transport device can not only transport other vehicles up and down from the ground or bridge deck, but also quickly transport itself to the ground or bridge deck. It is more flexible and maneuverable, and is suitable for the transportation of heavy-loaded vehicles on lower viaducts. When the three support arms are rotated and connected to form a "\ / \" structure, it is suitable for the transportation of light-loaded vehicles on higher viaducts while ensuring that the support arm group can be folded and unfolded. Therefore, the transport device can be used in different heights of viaducts and different heavy-loaded vehicles, and can meet the diverse needs of wartime.

[0048] Since the drum in the traction component reels and releases the traction rope, the support arm group is driven to fold and unfold, which can meet the larger tilt angle and greater bearing capacity after the support arm group is unfolded. It is not only flexible in operation, but also allows fast up and down transportation of different heavy-loaded vehicles on viaducts of different heights;

[0049] Since the second hydraulic component is connected to the transmission chain plate, and the transmission chain plate is wound around the fixed circular wheel, when the second hydraulic component is in tension, the adjacent support arms are linearly butted, so that the tension can be applied to the support arms through the transmission chain plate and the fixed circular wheel. The overall structure is compact, and as the angle between adjacent support arms changes, the arc of the transmission chain plate wound around the fixed circular wheel changes, thereby avoiding dead points of force when two or three support arms are folded or unfolded. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Figure 1 is a schematic diagram of the present invention as a whole in a folded state;

[0051] Figure 2 It is a schematic diagram of the present invention as a whole in a gradually unfolding state;

[0052] Figure 3It is a schematic diagram of the installation components of the present invention when they are unfolded;

[0053] Figure 4 is a top view of the mounting components of the present invention when they are folded;

[0054] Figure 5 is a schematic diagram of two support arms gradually unfolding in the present invention;

[0055] Figure 6 is a schematic diagram of a platform component located on a support arm in the present invention;

[0056] Figure 7 It is a schematic diagram of the present invention being located on the ground and transporting vehicles on the viaduct downward to the ground;

[0057] Figure 8 It is a schematic diagram of the present invention being located on a viaduct and transporting vehicles on the ground upward to the viaduct;

[0058] Fig. 9 It is a simplified diagram of the two support arms of the present invention working from folding to fully unfolding;

[0059] Fig.10 It is a simplified diagram of the three support arms of the present invention working from folding to fully unfolding;

[0060] Fig.11 It is a schematic diagram of the transport device being transported up and down between the ground and the bridge deck through the platform body;

[0061] Fig.12 is a schematic diagram of the model loading condition when two support arms are connected in a straight line in Example 3;

[0062] Fig.13 is a finite element analysis diagram of the deformation structure of the model in Example 3 at a height of 6m;

[0063] Fig.14 is a finite element analysis diagram of the deformation structure of the model in Example 3 at a height of 15m;

[0064] In the figure: 10, moving subject;

[0065] 20. erection component, 21. erection arm, 22. first hydraulic component, 23. first ear seat, 24. second ear seat, 25. tail shaft, 26. rotating plate, 27. third ear seat;

[0066] 30. arm component, 31. support arm, 32. rack, 33. guide rail, 34. fixed round wheel, 35. transmission chain plate, 36. second hydraulic component;

[0067] 40. Platform component, 41. Platform body, 42. Bottom plate seat, 43. Third hydraulic component, 44. Gear assembly;

[0068] 50. Traction component, 51. Reel, 52. Roller, 53. Traction rope. DETAILED DESCRIPTION

[0069] In order to make the purpose, technical solution and advantages of the technical solution of the present invention clearer, the technical solution of the embodiment of the present invention will be clearly and completely described in conjunction with the drawings of specific embodiments of the present invention. The same figure marks in the drawings represent the same parts. It should be noted that the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the described embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0070] Unless otherwise defined, the technical terms or scientific terms used herein shall have the usual meanings understood by persons of ordinary skill in the field to which the present invention belongs. The words "first", "second" and similar words used in the patent application specification and claims of the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "one" or "one" do not necessarily indicate a quantity limitation. Words such as "include" or "comprise" mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0071] The following description is based on the assumption that the transport device is in the initial folded state, the moving direction of the mobile body 10 is defined as the front, and the opposite side is defined as the rear;

[0072] like Figures 1 to 6 As shown, the present invention is a transport device for vehicles to quickly go up and down the viaduct, including a mobile body 10

[0073] The erection member 20 has an erection arm 21;

[0074] The mounting arm 21 rotates between being stacked parallel to the mobile body 10 and forming an obtuse angle with the mobile body 10;

[0075] The arm member 30 has a support arm group;

[0076] The support arm group is detachably connected to the erection arm 21, and rotates between being stacked in parallel on the erection arm 21 and forming an obtuse angle with the erection arm 21; the support arm group has at least two support arms 31, and adjacent support arms 31 perform switching movements between being stacked in parallel and being connected in a straight line;

[0077] The platform component 40 has a platform body 41 rotatably mounted on a base plate seat 42;

[0078] The base plate seat 42 is driven to move and is located on the support arm group, and the platform body 41 can be stacked on the support arm 31 in parallel and rotated to be parallel to the ground or bridge deck;

[0079] Specifically, the mobile body 10 can be a heavy-duty vehicle, and the operator is located in the cab to perform corresponding operations. The mobile body 10 has the necessary power or hydraulic system for the corresponding actions of the erection component 20, the arm component 30, and the platform component 40. Preferably, the transport device uses hydraulic pressure as the power input. The mobile body 10 can be a certain type of chassis vehicle, which will not be further elaborated here;

[0080] In the erection component 20, the erection arm 21 first drives the support arm group to rotate initially at a certain angle, and the support arm group then rotates at a certain angle again on the erection arm 21 to avoid excessive rotation angle of the support arm group relative to the mobile body 10 and excessive torque, thereby causing local force deformation; the erection arm 21 rotates on the mobile body 10, and the rotation angle range can be 0-110°;

[0081] In the arm member 30, the support arm group and the erection arm 21 are connected by rotation and disassembly. The rotation connection is used to ensure that the support arm group can adjust the inclination angle according to different use environments and overlap between the ground and the bridge deck. The disassembly connection is used for the support arm group and the erection arm 31 to be quickly disassembled and assembled; the rotation points of adjacent support arms 31 need to be extended so that the cross-section of the support arms 31 is limited when the adjacent support arms 31 are linearly connected, that is, the rotation angle of the adjacent support arms 31 is ensured to be 0-180°, 0° represents parallel stacking, 180° represents linear connection, and the positioning is switched between the two positions of 0° and 180°;

[0082] The support arm group is rotatably connected to the erection arm 21, and its rotation point is opposite to the rotation point of the erection arm 21 and the mobile body 10. The two opposite rotation points can ensure that the erection arm 21 is stacked on the mobile body 10 in parallel, and the support arm group is stacked on the erection arm 21. For example, the rear end of the erection arm 21 can be provided with a first ear seat 23 and a second ear seat 24 arranged oppositely. The erection arm 21 is rotatably connected to the mobile body 10 through the first ear seat 23 and is rotatably connected to the support arm group through the second ear seat 24.

[0083] As a preferred method for rotating and disassembling the support arm group and the erection arm 21, Figure 3As shown, the erection arm 21 is rotatably mounted with a rotating plate 26 through a tail shaft 25, that is, the rotating plate 26 is rotatably mounted on the second ear seat 24 through the tail shaft 25; both ends of the support arm group can be disassembled and assembled on the rotating plate 26 through a latch, that is, a plurality of pin holes are provided on the rotating plate 26, when the two ends of the support arm group are connected to the rotating plate 26, the latch passes through the support arm 31 and is positioned in the pin hole, thereby realizing the rotation between the support arm group and the erection arm 21, and the quick connection and separation, when the support arm group is separated from the rotating plate 26, the support arm group can be directly tilted and overlapped on the viaduct and the ground; as shown in FIG. Figure 2 , Figure 3 As shown, by the bolt-type installation of the support arm 21 and the rotating plate 26, and the rotation connection of the rotating plate 26 and the erection arm 21, the relative rotation between the support arm group and the erection arm 21 and the quick disassembly and assembly are realized, and it is possible to ensure that the erection arm 21 is stacked in parallel on the mobile body 10 and the support arm group is stacked in parallel on the erection arm 21;

[0084] In the platform component 40, the platform body 41 is used to receive the transported vehicle, and a docking mechanism for facilitating the positioning of the vehicle may be provided thereon. In addition, a springboard may be provided on the platform body 41, and the springboard is configured as a transition between the platform body 41 and the ground or the viaduct when the vehicle gets on and off the platform body 41;

[0085] The present invention is a transport device for vehicles to quickly go up and down the viaduct. Figure 1 , Fig. 9 , Fig.10 As shown, the platform body 41 is stacked in parallel on the uppermost support arm 31, and multiple support arms 31 are stacked in parallel on the erection arm 21, and the erection arm 21 is stacked in parallel on the mobile body 10. At this time, the transport device is in a folded state, and the overall structure is compact and occupies little space;

[0086] like Figure 7 , Figure 8 , Fig. 9 , Fig.10 As shown, when the transport device is located on the ground or on the bridge surface for transporting vehicles, the mobile body 10 is located in a suitable position, and a wider tire or additional support legs can be used to increase the stability of the mobile body 10; the erection arm 21 drives the support arm group to initially rotate a certain angle relative to the mobile body 10, and at the same time, the support arm group rotates a certain angle relative to the erection arm 21, and at least two support arms 31 change from a parallel stacking state to a linear docking state. At this time, the support arm group is in an unfolded state, and multiple support arms 31 are unfolded and connected between the ground and the bridge deck;

[0087] Then the support arm assembly is disassembled from the erection arm 21, and the support arm assembly is unfolded to independently support, and the platform body 41 is used to transport vehicles up and down, that is, the platform body 41 rotates relative to the bottom plate seat 42, and the bottom plate seat 42 moves on the support arm assembly, so that the platform body 41 can dock with the elevated bridge deck or the ground, and vehicles on the ground can be transported upward to the elevated bridge deck through the platform body 41, or vehicles on the elevated bridge deck can be transported downward to the ground through the platform body 41;

[0088] When the transport device is located on the ground to transport vehicles up and down the viaduct, the rotation angle between the support arm group and the erection arm 21 is small, such as an acute angle. When the transport device is located on the bridge deck to transport vehicles up and down the viaduct, the rotation angle between the support arm group and the erection arm 21 is large, such as an obtuse angle.

[0089] After the transportation of the vehicle is completed, the support arm group is installed and connected to the erection arm 21, the platform body 41 is stacked in parallel on the uppermost support arm 31, multiple support arms 31 are stacked in parallel on the erection arm 21, and the erection arm 21 is stacked in parallel on the mobile body 10. At this time, the transportation device is in a folded state again.

[0090] Embodiment 1, as Figure 2 , Figure 5 , Fig. 9 As shown, when the number of support arms 31 is an even number, the multiple support arms 31 are cyclically connected in a " / \" structure, and switch between parallel stacking and linear docking based on the downward angle;

[0091] The front support arm 31 is connected to the rear end of the mounting arm 21 in a rotatable and detachable manner;

[0092] Preferably, there are two support arms 31. If the number of support arms 31 is too large, not only will the structure be complicated, especially the switching between the stacking and straight-line docking actions between adjacent support arms 31, but also the overall structure will be unstable after the multiple support arms 31 are straight-line docked. Specifically, for the convenience of description, the front support arm 31 is defined as support arm A, and the rear support arm 31 is defined as support arm B. After the support arms A and B are rotatably connected to each other, their downward angles can be changed within 0°-180°.

[0093] like Fig. 9 , Fig.11As shown, when the transport device is in a folded state, the support arm A and the support arm B in a " / \" structure are stacked in parallel, and the support arm A is stacked in parallel on the erection arm 21, that is, the downward angle between the support arm A and the support arm B is 0°. When the support arm group is gradually unfolded, the downward angle between the support arm A and the support arm B gradually increases until it is a straight line docking of 180°. At this time, the support arm group is in a fully unfolded state; after the platform body 41 receives the vehicle, the downward angle between the support arm A and the support arm B decreases and retracts to the initial folded position;

[0094] When the number of the support arms 31 is two, as shown in FIG. Fig. 9 , Fig.11 As shown, not only can other vehicles be transported up and down from the ground or the bridge deck, but the transport device can also be transported to the ground or the bridge deck, which is more flexible; specifically, when the transport device is transported from the ground to the bridge deck, the support arm group is fully unfolded and overlapped between the ground and the bridge deck, the erection arm 21 on the mobile body 10 is first disassembled and separated from one end of the support arm A, and then moved to the bridge deck through the platform body 41, and then the erection arm 21 on the mobile body 10 is installed and connected with the other end of the support arm B, and finally the platform body 41 is stacked in parallel on the uppermost support arm 31, and the two support arms A and B are stacked in parallel to form an integral support arm group stacked in parallel on the erection arm 21, and the erection arm 21 is stacked in parallel on the mobile body 10, completing the folding of the transport device and the transportation from the ground upward;

[0095] On the contrary, when the transport device is transported from the bridge deck to the ground, the erection arm 21 on the mobile body 10 is first disassembled and separated from one end of the support arm B, and then moved to the ground through the platform body 41. Then the erection arm 21 on the mobile body 10 is installed and connected to the other end of the support arm A, and finally the transport device is folded and transported downward from the viaduct.

[0096] In Example 1, when there are two support arms 31, the support arm group can be unfolded to meet the requirements of a certain height of the viaduct, which is suitable for the transportation of heavy-load vehicles on a lower viaduct, such as the rapid up and down transportation of heavy-duty vehicles below 30t on an viaduct within 15m; and when the viaduct is higher, although two support arms 31 can also meet the requirements, the length of a single support arm 31 is required to be longer, so that the overall size of the folded support arm 31 is larger, resulting in a larger overall length of the transport device;

[0097] Embodiment 2, as Fig.10 As shown, when the number of the support arms 31 is three, the three support arms 31 are connected in a "\ / \" structure;

[0098] The front support arm 31 and the middle support arm 31 switch between parallel stacking and straight-line docking based on the upward angle; the middle support arm 31 and the rear support arm 31 switch between parallel stacking and straight-line docking based on the downward angle;

[0099] The mounting arm 21 is provided with a support seat that is driven to move, and the front support arm 31 is rotatable and detachably connected to the support seat;

[0100] Specifically, the three support arms 31 are connected from front to back in sequence as support arm A, support arm B, and support arm C, wherein the support arm A and the support arm B are adjusted to an upward angle within a range of 0-180°, and the support arm B and the support arm C are adjusted to a downward angle within a range of 0-180°;

[0101] The support seat is driven to move and is located on the erection arm 21. It can be connected between the support seat and the erection arm 21 by means of hydraulic parts or chain traction, and a slide rail is provided between the support seat and the erection arm 21; the support arm A can be rotated and disassembled and installed on the support seat through the rotating plate 26; the purpose of the movement of the support seat is to allow the support arm group to have enough space for adjustment when folding and unfolding. For example, when in the folded state, the support seat moves to the front end of the erection arm 21, and the folded support arm group can be completely located above the erection arm 21, avoiding misalignment between the support arm group and the erection arm 21, resulting in an overall length that is too large and an unstable center of gravity. When in the unfolded state, the support seat moves to the rear end of the erection arm 21, and the unfolded support arm group can be evenly stressed, avoiding excessive torque of the support arm group, and facilitating the disassembly and separation of the support arm group from the support seat of the erection arm 21;

[0102] like Fig.10 As shown, when the transport device is in a folded state, the support arms A, B, and C in a "\ / \" structure are stacked in parallel with each other, and the support arm A is stacked in parallel on the erection arm 21. When the support arm group is gradually unfolded, the upward angle between the support arm A and the support arm B gradually increases from 0° parallel stacking to 180° straight butt joint, and the downward angle between the support arm B and the support arm C gradually increases from 0° parallel stacking to 180° straight butt joint, at which time the support arm group is in a fully unfolded state; after the platform body 41 receives the vehicle, the upward angle between the support arm A and the support arm B decreases, and the downward angle between the support arm B and the support arm C decreases, and they retract to the initial folded position;

[0103] In Example 2, when there are three support arms 31, the length of the support arm group after unfolding is longer, but its torque becomes larger, it is easy to deform and damage at the node position, so it is suitable for the transportation of light-loaded vehicles on higher viaducts. In addition, due to the odd number of support arms 31, it can meet the requirements of vehicles going up and down the viaduct through the platform body 41, but it cannot meet the requirements of its own transportation device going up and down the viaduct, that is, it can meet the requirements of the mobile body 10 going up and down the viaduct through the platform body 41, but when the erection arm 10 is disassembled and separated from one end of the support arm group and installed and connected to the other end of the support arm group, the parallel stacking of the support arm group conflicts with the parallel stacking of the platform body 41;

[0104] In Example 1 and Example 2, in order to ensure the switching rotation of adjacent support arms 31 between parallel stacking and linear docking, the rotation point is located on the inner side of the angle between adjacent support arms 31. When linearly docking, the adjacent support arms 31 are limited by their own cross-sections. Preferably, the support arms 31 are made of H-shaped steel.

[0105] In some examples of the present invention, Figure 2 , Figure 4 As shown, the arm member 30 is driven to rotate on the erection arm 21 by the traction member 50;

[0106] The traction component 50 comprises a drum 51, a roller 52, and a traction rope 53;

[0107] The reel 51 is located on the mobile body 10 and is driven to rotate;

[0108] The roller 52 is rotatably mounted on the front end of the erection arm 21;

[0109] The other end of the transmission chain plate 35 is wound around the circumference of the fixed circular wheel 34 and then fixedly connected to the fixed circular wheel 34;

[0110] Specifically, the traction component 50 is configured to tighten the support arm component, ensure the unfolding and folding of the support arm group, and the rotation of the support arm group relative to the erection arm 21; the drum 51 can be connected to the hydraulic motor for rotation, and the traction rope 53 can be a steel wire rope, one end of which is wound and released by the drum 51, and the other end is wound around the roller 52 and detachably connected to the support arm group. This detachable connection can be that one end of the traction rope 53 is provided with a hook, and the support arm group is provided with a hanging hole, so that the disassembly and assembly can be done manually;

[0111] Preferably, when there are two support arms 31, the connection point of one end of the traction rope 53 is close to the rotation point of the adjacent support arm 31; when there are three support arms 31, the connection point of one end of the traction rope 53 is located on the middle support arm 31;

[0112] A third ear seat 27 is provided at the front end of the erection arm 21, and the roller 52 can be mounted on the third ear seat 27; in addition, a plurality of fixed pulleys or movable pulleys can be provided on the mobile body 10 and the erection component 20, so that the traction rope 53 can be wound around the fixed pulley and the movable pulley to make the traction smoother and avoid the occurrence of dead points or excessive bending angles;

[0113] When the support arm group is folded, the hydraulic motor starts to drive the drum 51 to rotate and reel in the traction rope 53. The other end of the traction rope 53 drives the support arm group close to the erection arm 21, and combined with the action of the second hydraulic component 36, the support arm group is folded and located on the erection arm 21; when the support arm group is unfolded, the hydraulic motor drives the drum 51 to rotate in the opposite direction to loosen the traction rope 53. On the one hand, the erection arm 21 rotates to drive the support arm group, and on the other hand, combined with the action of the second hydraulic component 36, the support arm group is unfolded into a straight line and finally overlapped between the ground and the viaduct, which can ensure that heavy vehicles within 30t can quickly get on and off the viaduct;

[0114] In this example, the reel 51 is wound or released to drive the traction rope 53 to pull the support arm group to complete the folding and unfolding of the support arm group, which can meet the larger inclination angle and greater bearing capacity of the support arm group after unfolding.

[0115] In some examples of the present invention, Figure 3 , Figure 4 , Figure 5 , Figure 6 As shown, the erection component 20 further includes a first hydraulic component 22, the tail end of the first hydraulic component 22 is movably mounted on the mobile body 10, and the telescopic end is rotatably connected to the erection arm 21;

[0116] A second hydraulic component 36 is movably installed between adjacent support arms 31 and driven to rotate by the second hydraulic component 36;

[0117] The platform component 40 further includes a third hydraulic component 43, the tail end of which is movably mounted on the bottom plate seat 42, and the telescopic end is rotatably connected to the platform body 41;

[0118] Specifically, the first hydraulic component 22, the second hydraulic component 36, and the third hydraulic component 43 are all driven and controlled by the hydraulic system on the mobile body 10; and when the support arm group and the erection arm 21 are disassembled, or the mobile body 10 is located on the platform body 41 for transportation, the hydraulic system on the mobile body 10 can always provide hydraulic power to the corresponding hydraulic components through the oil pipe;

[0119] The first hydraulic component 22 is actuated to drive the erection arm 21 to rotate relative to the mobile body 10, and the rotation angle range is 0-110°; the second hydraulic component 36 is actuated to drive the adjacent support arms 31 to rotate, and the rotation is positioned at a parallel stacking position of 0° and a linear docking position of 180°;

[0120] The third hydraulic component 43 is actuated to drive the platform body 41 to rotate relative to the base plate seat 42, and rotate to a parallel stacking position of 0° and parallel to the bridge deck or the ground.

[0121] In some examples of the present invention, Figure 5 As shown, adjacent support arms 31 are provided with fixed round wheels 34 at the rotational position, and the fixed round wheels 34 are fixedly connected to one of the support arms 31;

[0122] The second hydraulic component 36 is rotatably mounted on the other support arm 31, and the output end is connected to one end of the transmission chain plate 35; the transmission chain plate 35 is wound around the fixed round wheel 34, and the other end is fixed;

[0123] When the second hydraulic component 36 is in tension, the adjacent support arms 31 are butted in a straight line;

[0124] Specifically, the fixed circular wheel 34 may be a semicircular structure;

[0125] Taking two support arms 31 as an example, when the tail end of the second hydraulic component 36 is movably mounted on the support arm A and the telescopic end is directly connected to the support arm B, the second hydraulic component 36 is started. Although it can drive the relative rotation of the support arms A and B, it cannot meet the flexible adjustment of the support arms A and B at a large angle of 180°. For example, when the support arms A and B are connected in a straight line, one end of the second hydraulic component 36 needs to protrude to ensure the force of the support arm B and avoid the force dead point when the support arms A and B are folded or unfolded. However, the second hydraulic component 36 protruding at one end will affect the parallel stacking of the support arms A and B and occupy a large space.

[0126] In this example, the second hydraulic component 36 is connected to the transmission chain plate 35, and the transmission chain plate 35 is wound around the fixed circular wheel 34 and fixed at the other end. When the second hydraulic component 36 is in tension, the adjacent support arms 31 are linearly connected. Therefore, the pulling force can be applied to the support arms 31 through the transmission chain plate 35 and the fixed circular wheel 34. The overall structure is compact. As the angle between adjacent support arms 31 changes, the curvature of the transmission chain plate 35 wound around the fixed circular wheel 34 changes, thereby avoiding dead points of force when the support arms A and B are folded or unfolded.

[0127] In some examples of the present invention, Figure 6 As shown, a rack 32 and a guide rail 33 are arranged on the support arm 31 along the length direction;

[0128] The bottom plate seat 42 has a slide seat matched with the guide rail 33 at its lower end and a driving member at its upper end;

[0129] The driving member is meshedly connected with the rack 32 through the gear assembly 44;

[0130] Specifically, the support arm 31 may be composed of a pair of arm plates connected by a plurality of cross bars, for example, the arm plates are H-shaped steel;

[0131] The driving member may be a motor. After the motor is started, the slide seat cooperates with the guide rail 33, and the gear assembly 44 cooperates with the rack 32 to realize the movement of the bottom plate seat 42 on the support arm 31 and on the support arm 31 after multiple straight-line docking.

[0132] The base plate seat 42 moves on the uppermost support arm 31 to adjust the position of the platform body 41. For example, when multiple support arms 31 are linearly connected and overlapped on an elevated bridge, the base plate seat 42 can drive the platform body 41 to move on the support arm 31 to adjust the height position to facilitate the reception of vehicles; or when multiple support arms 31 are stacked in parallel, the base plate seat 42 moves on the uppermost support arm 31 to adjust the center of gravity position to avoid the problem of unbalanced weight of the transportation device during maneuvering.

[0133] In some examples of the present invention, a rotating platform with controlled rotation is provided at the upper end of the mobile body 10, and the rotation axis is arranged vertically;

[0134] The erection member 20 is mounted on a rotating platform;

[0135] Specifically, the rotating platform can be rotatably mounted on the mobile body 10 through a slewing bearing, and the slewing bearing is driven to rotate by a hydraulic system. At this time, the erection component 20 and the arm component 30 are both located on the rotating platform;

[0136] When vehicles are going up and down the viaduct, a problem may occur: due to the site environment, the mobile body 10 often needs to be adjusted to a suitable position in advance, in order to maintain stability and to allow the arm component 30 to dock smoothly on the viaduct or the ground. If a rotating platform is not provided between the erection component 20 and the mobile body 10, the erection component 20 needs to be installed on the mobile body 10 at a specific angle during assembly. At this time, the angle of the mobile body 10 needs to be constantly adjusted to adapt to different site environments, resulting in a significant decrease in vehicle transportation efficiency.

[0137] This example can drive the angle adjustment of the erection components 20 and the support arm relative to the mobile body 10 by rotating the rotating platform, and is suitable for different usage environments. For example, when the width of the viaduct is small, the mobile body 10 can be arranged at a certain angle with the unfolded support arm.

[0138] In some examples of the present invention, the platform body 41 is provided with a level sensor connected to the controller;

[0139] After receiving the signal from the level sensor, the controller controls the third hydraulic component 43 to operate;

[0140] Specifically, the level sensor is used to ensure that the platform body 41 is in a horizontal state when it rotates relative to the uppermost support arm 31, that is, it is convenient for vehicles to move from the ground to the platform body 41, or for vehicles to move from the elevated bridge road surface to the platform body 41;

[0141] After receiving the signal, the controller can adjust the output of the third hydraulic component 43 in real time to ensure that the platform body 41 always maintains a horizontal state.

[0142] In some examples of the present invention, both sides of the platform body 41 are rotatably mounted with a springboard for the vehicle to transition from the platform body 41 to the ground or the viaduct;

[0143] Specifically, the springboard can be rotatably mounted on the platform body 41 through the ear seat, that is, the driving motor is started to drive the axis where the springboard is installed to rotate, thereby realizing the rotation of the springboard on the platform body 41, and the rotation angle is adjustable;

[0144] When the springboard is not in use, it is stacked on the platform body 41. When the platform body 41 needs to receive a vehicle, the springboard on the corresponding side is rotated to contact the ground or the elevated bridge road surface.

[0145] When used, the transport device for vehicles to quickly go up and down the viaduct specifically comprises the following steps:

[0146] S1, when initially folded, the platform body 41 is stacked in parallel on the uppermost support arm 31, two or three support arms 31 are stacked in parallel up and down on the erection arm 21, and the erection arm 21 is stacked in parallel on the mobile body 10;

[0147] S2, when the transport device is located on the ground or on the bridge deck to transport vehicles up and down, the mobile body 10 is located at a suitable position, the first hydraulic component 22 is started, so that the erection arm 21 drives the support arm group to initially rotate a certain angle relative to the mobile body 10, and at the same time the traction component 50 and the second hydraulic component 36 are actuated, the support arm group rotates a certain angle relative to the erection arm 21, and two or three support arms 31 are changed from a parallel stacking state to a straight-line docking state, and finally the two or three support arms 31 docked in a straight line are overlapped on the viaduct to complete the overall deployment;

[0148] S4, when the overall deployment is completed, the erection arm 21 and the traction component 50 are disassembled and separated from the support arm group. At this time, the support arm group is deployed to support independently, and the third hydraulic component 43 drives the platform body 41 to rotate relative to the bottom plate seat 42, and the bottom plate seat 42 moves on the support arm group, so that the platform body 41 can dock with the elevated bridge deck or the ground, and the vehicles on the ground can be transported upward to the elevated bridge deck through the platform body 41, or the vehicles on the elevated bridge deck can be transported downward to the ground through the platform body 41;

[0149] S5, after the transportation of the vehicle up and down the viaduct is completed, the erection arm 21 and the traction component 50 are installed and connected from the support arm group, the platform body 41 is stacked in parallel on the uppermost support arm 31, two or three support arms 31 are stacked in parallel on the erection arm 21, and the erection arm 21 is stacked in parallel on the mobile body 10, and the transport device is in a folded state again;

[0150] S6, when the number of support arms 31 is two and the support arm group is fully unfolded and overlapped between the ground and the bridge deck,

[0151] The erection arm 21 on the mobile body 10 is first disassembled and separated from one end of one support arm 31, and then moved to the bridge deck or the ground through the platform body 41, and the erection arm 21 on the mobile body 10 is then installed and connected to one end of the other support arm 31.

[0152] The platform body 41 is stacked in parallel on the uppermost support arm 31, the two support arms 31 are stacked in parallel on the erection arms 21, and the erection arms 21 are stacked in parallel on the mobile body 10, thereby completing the folding of the transport device and the transport of the upper and lower viaducts.

[0153] Example 3

[0154] The linear connection of two support arms 31 is selected as the key structure for analysis;

[0155] The support arm 31 is made of 400×400×15×21 H-shaped steel as the main structure. The length of two support arms 31 after being stacked in parallel is 7.5m. After being unfolded, it can overcome the up and down problems of the viaduct within 15m and ensure the transportation of heavy vehicles below 30t. The height H from the viaduct deck to the horizontal ground is not less than 6m;

[0156] When the transport device is working, the arm component 30 is unfolded, and the main force-bearing structures are the arm component 30 and the platform component 40. The force analysis of the above two components is carried out using ANSYS finite element analysis software to simulate the force conditions of the transport device under two working conditions of viaduct heights of 6m and 15m;

[0157] Consider that when the front of the vehicle is facing the outside of the platform component 40, the bending moment of the platform component 40 is the largest. Fig.12 As shown, this working condition is used as the basic loading model. On this basis, the center of gravity of the vehicle is simplified to the second axis. The center of gravity of the actual vehicle will be slightly biased backward. The weight of 30t is loaded on the sliding platform in the form of 4 linear loads. The distances between the 4 loading lines are 1550, 4200 and 1450mm respectively.

[0158] like Fig.13 As shown in FIG. 1 , when the transport device overcomes an obstacle at a height of 6 m, the angle between the platform body 41 and the horizontal plane is 23.58°, and the deformation of the arm component 30 and the platform component 40 is as shown in FIG. Figure 3 As shown, the maximum deformation is at the end of the platform body 41, about 109.74mm, which is equivalent to the angle of the platform body 41 becoming 0.629°, and the impact on the transportation of the vehicle can be ignored. The deformation of other positions is within 10cm, so the deformation of the device can meet the use requirements;

[0159] like Fig.14 As shown, when the transport device overcomes the obstacle of the maximum height of 15m, the angle between the platform body 41 and the horizontal plane is 90°, and the deformation of the arm component 30 and the platform component 40 is as shown in FIG. Figure 5 As shown, the maximum deformation is at the end of the platform body 41, which is about 97.55 mm, which is equivalent to the angle of the sliding platform becoming 0.56°. The impact on vehicle transportation can be ignored. The deformations at other positions are all within 9 cm. Therefore, the deformation of the device can meet the use requirements.

[0160] An exemplary implementation of a transportation device for quickly getting vehicles on and off an elevated bridge proposed by the present invention is described in detail above with reference to a preferred embodiment. However, it can be understood by those skilled in the art that, without departing from the concept of the present invention, various modifications and variations can be made to the above-mentioned specific embodiments, and various technical features and structures proposed by the present invention can be combined in various ways without exceeding the protection scope of the present invention, which is determined by the attached claims.

Claims

1. A transport device for vehicles to quickly get on and off an elevated bridge, characterized in that: comprising a mobile body (10) A mounting member (20) having a mounting arm (21); The mounting arm (21) rotates between being stacked parallel to the moving body (10) and forming an obtuse angle with the moving body (10); The support arm component (30) has a support arm group; The support arm assembly is detachably connected to the erection arm (21) and is rotatable between being stacked in parallel on the erection arm (21) and forming an obtuse angle with the erection arm (21); The support arm group comprises at least two support arms (31), and adjacent support arms (31) perform switching motion between parallel stacking and linear docking; The platform component (40) comprises a platform body (41) rotatably mounted on a base plate seat (42); The base plate seat (42) is driven to move and be located on the support arm group, and the platform body (41) can be stacked in parallel on the support arm (31) and rotated to be parallel to the ground or the bridge deck.

2. A transport device for vehicles to quickly get on and off a viaduct according to claim 1, characterized in that: When the number of the support arms (31) is two, the two support arms (31) are connected in a " / \" structure, and switch between parallel stacking and linear docking based on the downward angle; The front support arm (31) is connected to the rear end of the erection arm (21) in a rotatable and detachable manner.

3. The transport device for vehicles to quickly go up and down a viaduct according to claim 1, characterized in that: When the number of the support arms (31) is three, the three support arms (31) are connected in a "\ / \" structure; The front support arm (31) and the middle support arm (31) switch between parallel stacking and straight-line docking based on an upward angle; the middle support arm (31) and the rear support arm (31) switch between parallel stacking and straight-line docking based on a downward angle; The erection arm (21) is provided with a support seat which is driven to move, and the front support arm (31) is rotatably and detachably connected to the support seat.

4. A transport device for vehicles to quickly get on and off a viaduct according to claim 2 or 3, characterized in that: The support arm component (30) is driven to rotate on the erection arm (21) by a traction component (50); The traction component (50) comprises a reel (51), a roller (52), and a traction rope (53); The reel (51) is located on the mobile body (10) and is driven to rotate; The roller (52) is rotatably mounted on the front end of the erection arm (21); One end of the traction rope (53) is rolled up on the drum (51), and the other end is wound around the outside of the roller (52) and then connected to the support arm assembly.

5. The transport device for vehicles to quickly get on and off a viaduct according to claim 4, characterized in that: The erection component (20) further comprises a first hydraulic component (22), the tail end of the first hydraulic component (22) being movably mounted on the mobile body (10), and the telescopic end being rotatably connected to the erection arm (21); A second hydraulic component (36) is movably installed between adjacent support arms (31), and is driven by the second hydraulic component (36) to perform switching movement between parallel stacking and linear docking; The platform component (40) also includes a third hydraulic component (43), the tail end of which is movably mounted on the base plate seat (42) and the telescopic end of which is rotatably connected to the platform body (41).

6. A transport device for vehicles to quickly go up and down a viaduct according to claim 5, characterized in that: Adjacent support arms (31) are provided with fixed circular wheels (34) at the rotational positions, and the fixed circular wheels (34) are fixedly connected to one of the support arms (31); The second hydraulic component (36) is rotatably mounted on the other support arm (31), and the output end is connected to one end of the transmission chain plate (35); the other end of the transmission chain plate (35) is wound around the circumference of the fixed circular wheel (34) and then fixedly connected to the fixed circular wheel (34); When the second hydraulic component (36) is in tension, adjacent support arms (31) are linearly butted.

7. The transport device for vehicles to quickly go up and down a viaduct according to claim 4, characterized in that: A rotating plate (26) is rotatably mounted on the rear end of the erection arm (21); When the support arm group includes two support arms (31), both ends of the support arm group can be detached and assembled on the rotating plate (26) by means of a latch; When the support arm group includes three support arms (31), one end of the front support arm is detachably mounted on the rotating plate (26) through a latch, and the rotating plate (26) is rotatably mounted on the support seat.

8. The transport device for vehicles to quickly go up and down a viaduct according to claim 4, characterized in that: The support arm (31) is provided with a rack (32) and a guide rail (33) along the length direction; The bottom end of the base plate seat (42) is provided with a slide seat matched with the guide rail (33), and the top end is provided with a driving member; the driving member is meshed and connected with the rack (32) through a gear assembly (44); When the support arm group is unfolded, the racks (32) and guide rails (33) on adjacent support arms (31) can be connected in a straight line.

9. The transport device for vehicles to quickly go up and down a viaduct according to claim 5, characterized in that: The upper end of the mobile body (10) is provided with a rotating platform that is controlled to rotate, and the rotating axis is arranged vertically; The erection component (20) is mounted on a rotating platform; The platform body (41) is provided with a level sensor connected to the controller; After receiving the signal from the level sensor, the controller controls the third hydraulic component (43) to operate to adjust the level of the platform body (41).

10. A method for using the transport device for quickly getting vehicles on and off an elevated bridge as claimed in claim 5, characterized in that: The specific steps include: S1, when initially folded, the platform body (41) is stacked in parallel on the uppermost support arm (31), two or three support arms (31) are stacked in parallel up and down on the erection arm (21), and the erection arm (21) is stacked in parallel on the moving body (10); S2, when the transport device is located on the ground or on a bridge deck to transport vehicles up and down, the mobile body (10) is located at a suitable position, the first hydraulic component (22) is activated, so that the erection arm (21) drives the support arm group to initially rotate a certain angle relative to the mobile body (10), and at the same time the traction component (50) and the second hydraulic component (36) are actuated, the support arm group rotates a certain angle relative to the erection arm (21), and two or three support arms (31) change from a parallel stacked state to a straight-line docked state, and finally the two or three support arms (31) docked in a straight line are overlapped on the viaduct to complete the overall deployment; S4, when the overall deployment is completed, the erection arm (21) and the traction component (50) are disassembled and separated from the support arm group, and the support arm group is deployed to independently support, and the third hydraulic component (43) drives the platform body (41) to rotate relative to the base plate seat (42), and the base plate seat (42) moves on the support arm group, so that the platform body (41) can dock with the elevated bridge deck or the ground, and vehicles on the ground can be transported upward to the elevated bridge deck through the platform body (41), or vehicles on the elevated bridge deck can be transported downward to the ground through the platform body (41); S5, after the transportation of the vehicle up and down the viaduct is completed, the erection arm (21) and the traction component (50) are installed and connected from the support arm group, the platform body (41) is stacked in parallel on the uppermost support arm (31), two or three support arms (31) are stacked in parallel on the erection arm (21), and the erection arm (21) is stacked in parallel on the moving body (10), and the transport device is now in a folded state again; S6, when the number of the supporting arms (31) is two and the supporting arm group is fully unfolded and overlapped between the ground and the bridge deck, the erection arm (21) on the mobile body (10) is first disassembled and separated from one end of one of the supporting arms (31), and then moved to the bridge deck or the ground through the platform body (41), and the erection arm (21) on the mobile body (10) is then installed and connected to one end of the other supporting arm (31). The platform body (41) is stacked in parallel on the uppermost support arm (31), the two support arms (31) are stacked in parallel on the erection arm (21), and the erection arm (21) is stacked in parallel on the mobile body (10), thereby completing the folding of the transport device and the transport of the upper and lower viaducts.

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