A turnout structure for a suspended monorail and a turnout diversion method

Abstract

The present application provides a turnout structure and a turnout diversion method for a suspended monorail system, which adopt a specific combination of a fixed rail and a swing rail to solve the interference problem between the movable rail and the motor car or vehicle that may occur when a conventional railway turnout in the prior art is applied to a suspended monorail using a steel wheel-steel rail system.

Description

Technical Field

[0001] This application relates to the field of suspended monorails, and particularly to a turnout structure and a turnout diversion method for a suspended monorail. Background Art

[0002] Rail transit systems generally include conventional railway systems, straddle monorail systems, suspended monorail systems, etc.

[0003] At present, the conventional railway system adopts a steel wheel and steel rail system, and a number of sleepers are laid under the steel rails. In its turnout structure, in addition to the fixed rails forming the running channels, the transformation of whether different running channels are in a passing state is achieved by changing the position of the movable rails; since in the conventional railway system, the power bogie or the motor car, vehicle, etc. are located above the steel rails, the position transformation of the movable rails is usually the position transformation of the end of the movable rails, and the whole movable rail is located inside the running channel and has a large angle with the space plane of the running channel.

[0004] In the straddle monorail system and the suspended monorail system, the track beam can be a single profile structure, and the design of its turnout structure is relatively simple. For example, the turnout structure can be achieved by swinging a number of single profile structures.

[0005] In the suspended monorail system, there are also track beams using double-structured assemblies or box-type structures. At present, when this structure is applied, the power bogie or the motor car, etc. usually adopt a rubber wheel system, mainly because after the power bogie or the motor car adopts a steel wheel and steel rail system in this structure, the design of its turnout structure is more complex. Summary of the Invention

[0006] On the basis of the foregoing, if the turnout structure of the existing conventional railway system is applied to the second type of suspended monorail system adopting a steel wheel and steel rail system, there will be a problem of interference between the movable rail and the motor car suspended on the track beam; because the whole movable rail is located inside the running channel and has a large angle with the space plane of the running channel.

[0007] The turnout structure of a conventional railway system usually includes at least two running channels. Any running channel includes a long rail and a short rail, and the two short rails of the two running channels intersect to form a frog. At the frog, there are two movable rails. One end of the two movable rails is connected to the frog, and the other ends are respectively located inside the two long rails. When any running channel is in use, the other end of one of the movable rails moves to be tangentially locked with the long rail. However, in this design, when any movable rail is not in use, it has a large angle with the direction of the running channel, that is to say, any movable rail interferes with the running channel itself. The conventional railway system can adopt this method because the power bogie or motor car, etc. are located above the rail. Even if the movable rail interferes with the running channel itself, it will not interfere with the power bogie or motor car, etc. However, if the solution of the conventional railway system is directly applied to the suspended monorail system with the above-mentioned second structure using a steel wheel-rail system, the movable rail will interfere with the power bogie or motor car, etc. The suspended monorail system with the above-mentioned second structure can also adopt a rubber tire system, but the rubber tire system can adopt a simpler method in the turnout structure design. Therefore, this application does not involve the suspended monorail system with a rubber tire system, nor does it involve the suspended monorail system using a single-profile track beam, and is particularly applicable to the suspended monorail system using a double-structure assembly or a box-type structure track beam.

[0008] Therefore, this application hopes to provide a turnout structure and a turnout diversion method for a suspended monorail system to solve the above technical problems.

[0009] The technical solution of the first aspect provided by this application, that is, a turnout structure for a suspended monorail system, includes a turnout beam and a swinging rail; the turnout beam includes a first running channel and a second running channel, and the swinging rail includes a first swinging rail and a second swinging rail;

[0010] In the passing state of the first running channel, the second swinging rail forms a part of one side running rail of the first running channel, and the first swinging rail is entirely located outside the other side running rail of the first running channel;

[0011] In the passing state of the second running channel, the first swinging rail forms a part of one side running rail of the second running channel, and the second swinging rail is entirely located outside the other side running rail of the second running channel.

[0012] This application also provides the technical solution of the first aspect combined by any one or several of the following features:

[0013] Optionally, the first running channel is provided with a first fixed long rail and a first fixed short rail; the second running channel is provided with a second fixed short rail and a second fixed long rail; the first fixed short rail and the second fixed short rail are located between the first fixed long rail and the second fixed long rail;

[0014] When the first running channel is in a passing state, both ends of the second swing rail are respectively locked to the second fixed long rail and the first fixed short rail, and the whole of the first swing rail is located outside the first fixed long rail; a part of the second fixed long rail, the second swing rail, and the first fixed short rail form one side running rail of the first running channel, and the first fixed long rail is the other side running rail of the first running channel;

[0015] When the second running channel is in a passing state, both ends of the first swing rail are respectively locked to the first fixed long rail and the second fixed short rail, and the whole of the second swing rail is located outside the second fixed long rail; a part of the first fixed long rail, the first swing rail, and the second fixed short rail form one side running rail of the second running channel, and the second fixed long rail is the other side running rail of the second running channel.

[0016] Several moving supports are connected below the swing rail, and several moving supports are connected to a swing device; the swing device is provided with a swing shaft, and the swing shaft is arranged outside the first running channel and the second running channel.

[0017] Optionally, several moving supports support the movement of the swing rail synchronously.

[0018] Optionally, the shape of the swing rail remains unchanged when the first running channel is in a passing state, the second running channel is in a passing state, and during the transition state between the first running channel being in a passing state and the second running channel being in a passing state.

[0019] Optionally, rail tips are provided at both ends of the first swing rail and the second swing rail.

[0020] Optionally, the starting ends of the first fixed short rail and the second fixed short rail intersect, and a fixed frog is arranged at the intersection.

[0021] The present application also provides a technical solution in another aspect, that is, a turnout diversion method for a suspended monorail system, including the following steps:

[0022] 1) Select the passing state of the first running channel. The first swing rail is locked outside the first fixed long rail. The second swing rail first swings to the inside of the first running channel, and then is translated as a whole until its two ends are respectively locked and connected to the second fixed long rail and the first fixed short rail;

[0023] 2) Select the passing state of the second running channel. The second swing rail is locked outside the second fixed long rail. The first swing rail first swings to the inside of the second running channel, and then is translated as a whole until its two ends are respectively locked and connected to the first fixed long rail and the second fixed short rail.

[0024] The above turnout diversion method is a process of mutual switching between the passing states of the first running channel and the second running channel. Specifically, during the working process, if the EMU selects the passing state of the first running channel or the second running channel, the position relationship between the running channel of the turnout, the fixed rail, and the swinging rail is first determined, and then appropriate adjustments are made as needed.

[0025] The solution of this application is essentially different from the state transformation method of conventional railway turnouts. When the movable rail of a conventional railway is not in use, it is basically in a position transverse to the running channel; when the movable rail is in use, its port part is moved to the connection position of the fixed rail. The solution of this application adopts a different setting method. When the swinging rail is not in use, it is located outside the running rail; when the swinging rail is in use, the connection between the swinging rail and the fixed rail is a partial connection. The solution of this application more effectively solves the problem of complex turnout structure after the suspended monorail adopts the steel wheel-rail system.

[0026] In this application, the longitudinal direction refers to the running direction of the track or turnout beam, the transverse direction is horizontally perpendicular to the running direction, and the vertical direction is vertically perpendicular to the running direction. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a schematic diagram of the passing state of the first running channel in the embodiment of this application;

[0028] Figure 2 is a schematic diagram of the passing state of the second running channel in the embodiment of this application;

[0029] Figure 3 is Figure 1 a schematic diagram of the cross-section at A'-A' when the EMU passes through in

[0030] Figure 4 is Figure 3 an enlarged view of M in

[0031] Figure 5 is Figure 1 a schematic diagram of the cross-section at B'-B' when the EMU passes through in

[0032] Figure 6 is Figure 5 an enlarged view of N in

[0033] Figure 7 is a three-dimensional view of the overall turnout beam structure in the passing state of the first running channel;

[0034] Figure 8 is Figure 7 the bottom view of

[0035] Figure 9 is Figure 7 an enlarged view of E in

[0036] Figure 10 Is Figure 7 An enlarged view of the F position in

[0037] Figure 11 Is a three-dimensional view of the overall turnout beam structure in the passing state of the second running channel;

[0038] Figure 12 Is Figure 11 A bottom view of

[0039] Figure 13 Is Figure 11 An enlarged view of the G position in

[0040] Figure 14 Is Figure 11 An enlarged view of the H position in

[0041] Figure 15 Is a schematic diagram of a train passing through the turnout beam in the embodiment of the present application;

[0042] Figure 16 Is Figure 15 A bottom view when there is no motor car. Specific embodiments

[0043] The following specific embodiments illustrate the implementation manners of the present application. Those skilled in the art can easily understand other advantages and effects of the present application from the content disclosed in this specification.

[0044] Please refer to Figures 1 to 16 Note that the structures, proportions, sizes, etc. shown in the drawings of this specification are only used to cooperate with the content disclosed in the specification for those skilled in the art to understand and read, and are not used to limit the implementation conditions of the present application. Therefore, they do not have technical essence. Any modification of the structure, change of the proportional relationship, or adjustment of the size, without affecting the effects and purposes that the present application can achieve, should still fall within the scope that the technical content disclosed in the present application can cover. At the same time, the terms such as "upper", "lower", "left", "right", "middle", and "one" cited in this specification are only for the convenience of clear description and are not used to limit the implementation scope of the present application. The change or adjustment of their relative relationships, without substantial change in the technical content, should also be regarded as the scope that the present application can implement.

[0045] Please refer to Figures 1 - 2 As shown in Figures 1 - 2 Is a schematic diagram of the turnout structure of the present application. A turnout structure for a suspended monorail system provided by the present application includes a turnout beam 30 and a swing rail;

[0046] The turnout beam 30 includes a first running channel L1 and a second running channel L2, and the swing rails include a first swing rail 500 and a second swing rail 600;

[0047] Please refer to Figure 1 As shown, when the first running channel L1 is in a passing state, the second swing rail 600 forms a part of one side running rail of the first running channel L1, and the first swing rail 500 is entirely located outside the other side running rail of the first running channel L1;

[0048] Please refer to Figure 2 As shown, when the second running channel L2 is in a passing state, the first swing rail 500 forms a part of one side running rail of the second running channel L2, and the second swing rail 600 is entirely located outside the other side running rail of the second running channel L2.

[0049] The above settings are the principle designs of the solution of this application. It more reflects the design idea of the overall solution and the improvement points of applying the existing conventional railway to the suspended monorail system of this application. The difference from the conventional railway system is mainly reflected in how to avoid the position design of the swing rail in the non-use state under different passing channel states of the turnout structure, so as to avoid its interference with the motor car 40 or the vehicle 20, etc. The motor car mentioned above can also be a powered bogie.

[0050] In addition, please refer to Figures 3 - 4 As shown, Figure 3 is Figure 1 a schematic diagram of the cross-section at A'-A' when passing through the motor car in Figure 4 is Figure 3 an enlarged view of the M part in

[0051] The motor car or the powered bogie travels along the running rails on both sides. One running rail includes the second swing rail 600 and the fixed rail of the turnout beam 30 itself, and the other running rail is the fixed rail of the turnout beam 30. The wheels 401 of the motor car or the powered bogie are made of steel wheels, and the running rails are all made of steel rails. The second swing rail 600 can be locked and connected to the fixed rail, for example, tangentially locked connection, as shown in the enlarged M part; the second swing rail 600 is tangentially locked and connected to the fixed rail, and the second swing rail 600 is connected with a lateral movement device, and the lateral movement device prompts the second swing rail 600 to move laterally within the first running channel L1.

[0052] Figure 5 is Figure 1 a schematic diagram of the cross-section at B'-B' when passing through the motor car in Figure 6 is Figure 5Enlarged view at N; The motor car 40 or the powered bogie travels along the running rails on both sides, one of the running rails is the second swing rail 600, and the other running rail is the fixed rail of the switch beam 30. The wheels 401 of the motor car or the powered bogie are made of steel wheels, and the running rails are all made of steel rails, as shown in the enlarged part M; The second swing rail 600 is connected with a lateral movement device, and the lateral movement device causes the second swing rail 600 to move laterally within the first running channel L1. Figures 5 - 6 It can also show the fixed rail of the second running channel L2.

[0053] Please refer to Figures 7 - 8 、 Figures 11 - 12 as shown; Figure 7 is a perspective view of the overall switch beam structure in the passing state of the first running channel L1; Figure 8 is Figure 7 bottom view of; Figure 11 is a perspective view of the overall switch beam structure in the passing state of the second running channel; Figure 12 is Figure 11 bottom view of;

[0054] Figures 7 - 8 、 Figures 11 - 12 The switch structure shown in 、 includes a switch beam 30 and swing rails; The swing rails move within the switch beam 30, the switch beam 30 includes a first running channel L1 and a second running channel L2, and the swing rails include a first swing rail 500 and a second swing rail 600;

[0055] The first running channel L1 is provided with a first fixed long rail 100 and a first fixed short rail 300; The second running channel L2 is provided with a second fixed short rail 400 and a second fixed long rail 200; The first fixed short rail 300 and the second fixed short rail 400 are located between the first fixed long rail 100 and the second fixed long rail 200;

[0056] Please refer to Figure 8 As shown from the entrance of channel A to the entrance of channel B, that is, in the passing state of the first running channel, both ends of the second swing rail 600 are locked to the second fixed long rail 200 and the first fixed short rail 300 respectively, and the whole of the first swing rail 500 is located outside the first fixed long rail 100; Part of the second fixed long rail 200, the second swing rail 600, and the first fixed short rail 300 form one side running rail of the first running channel, and the first fixed long rail 100 is the other side running rail of the first running channel;

[0057] Please refer to Figure 12As shown, in the case of the second traveling channel from the A port of the channel to the C port, both ends of the first swing rail 500 are respectively locked to the first fixed long rail 100 and the second fixed short rail 400, and the whole of the second swing rail 600 is located outside the second fixed long rail 200; part of the first fixed long rail 100, the first swing rail 500, and the second fixed short rail 400 form one side traveling rail of the second traveling channel, and the second fixed long rail 200 is the other side traveling rail of the second traveling channel.

[0058] In addition, please refer to Figures 9 - 10 as shown, Figure 9 which is Figure 7 the enlarged view of the E position in Figure 10 which is Figure 7 the enlarged view of the F position in Figure 7 which is, for example, Figure 8 the C'-C' cross-section in Figure 9 As shown, the first swing rail 500 is located outside the first fixed long rail 100. Preferably, the first swing rail 500 is located outside the equipment clearance limit of the turnout vehicle to facilitate the passage of the turnout vehicle; the first swing rail 500 is connected to the lateral movement device 101, the lateral movement device 101 is connected to the swing device 10, and the swing device 10 rotates and swings in the vertical plane along the swing axis 102. The lateral movement device 101 can cause the whole of the first swing rail 500 to move, for example, it can move laterally in the first traveling channel or move outside the first traveling channel. Figure 10 As shown, the second swing rail 600 is tangentially and locked to the first fixed short rail 300. The second swing rail 600 is connected to the lateral movement device 101, and the lateral movement device is connected to the swing device. The swing device 10 rotates and swings in the vertical plane along the swing axis 102.

[0059] Please refer to Figures 13 - 14 as shown, Figure 13 which is Figure 11 the enlarged view of the G position in Figure 14 which is Figure 11 the enlarged view of the H position in Figure 11 which is, for example, Figure 12 the D'-D' cross-section in Figure 13 As shown, the first swing rail 500 is tangentially and locked to the first fixed short rail 300. The first swing rail 500 is connected to the lateral movement device 101, and the lateral movement device is connected to the swing device 10. The swing device 10 rotates and swings in the vertical plane along the swing axis 102. Figure 14As shown, the second swing rail 600 is located outside the second fixed long rail 200. Preferably, the second swing rail 600 is located outside the equipment clearance limit of the turnout vehicle to facilitate the passage of the turnout vehicle. The second swing rail 600 is connected to the lateral movement device 101, and the lateral movement device 101 is connected to the swing device. The swing device 10 rotates and swings in the vertical plane along the swing axis 102. The lateral movement device can cause the overall movement of the second swing rail, for example, it can move laterally within the second running channel or outside the second running channel.

[0060] In this application, the swing rail can maintain its shape unchanged during the swinging process and the locked state, only the position changes. For example, in the passing state of the first running channel, the passing state of the second running channel, and the transition state between the passing state of the first running channel and the passing state of the second running channel, the shape of the swing rail, that is, the first swing rail and the second swing rail, remains unchanged.

[0061] At the C'-C' section and the D'-D' section, the starting ends of the first fixed short rail and the second fixed short rail can intersect or not intersect. If they intersect, a fixed frog is provided at the intersection.

[0062] In the embodiment of this application, the tangential locking connection between the swing rail and the fixed rail can be locked by the locking device 50 provided at the lateral movement device. Refer to the appendix Figure 4 . The swing device 10 in the embodiment of this application can be connected to the structure of the turnout beam, for example Figure 15 , or an independent swing device can be additionally provided.

[0063] The long rail and the short rail described in this application are relative descriptions made with reference to the turnout. However, in the actual track, both the long rail and the short rail are designed accordingly depending on the length of the overall track.

[0064] In the embodiment of this application, the adoptable track beam structure can be a conventional track beam structure applied to the suspended track, such as a box-type structure beam with a lower opening; or a track beam with a specific structure adopted in this application, such as Figures 15 - 16 shown; Figures 15 - 16 The turnout beam 30 shown includes a first main body 1100, a second main body 1200, and a plurality of third main bodies 1300. The first main body 1100 and the second main body 1200 are arranged symmetrically in a mirror image, and the third main bodies 1300 are respectively fixed on the upper surfaces of the first main body 1100 and the second main body 1200. Figure 15 In it, 60 is the track beam support, and 70 is the transported container.

[0065] Specifically, below the third main body 1300, the space between the first main body 1100 and the second main body 1200 forms the running space for the motor vehicle.

[0066] The first main body 1100, the second main body 1200, and the third main body 1300 are steel structures of the shape type; the preset spacing between the first main body 1100 and the second main body 1200 respectively forms the upper opening and the lower opening of the running space; there is a preset interval distance between adjacent third main bodies 1300.

[0067] The first main body, the second main body, and the third main body do not limit their specific structural shapes.

[0068] Please refer to Figures 3 - 4 as shown in Figure 3 is Figure 1 a schematic diagram of the cross-section at A'-A' when a motor car passes through in Figure 4 is Figure 3 an enlarged view of M in ; in the passing state of the first running channel, one end of the second swing rail 600 is the rail tip, which is tangentially and locked to the second fixed long rail 200; please refer to Figure 10 as shown in , in the passing state of the first running channel, the other end of the second swing rail 600 is the rail tip, which is tangentially and locked to the first fixed short rail 300.

[0069] In addition, in the passing state of the second running channel, both ends of the first swing rail 500 can be rail tips, which are respectively tangentially and locked to the first fixed long rail 100 and the second fixed short rail 400.

[0070] The rail tip is a conventional method for switching the use of two steel rails in the turnout structure of the existing rail transit system.

[0071] The first swing rail and the second swing rail described in this application are both steel rails that do not need to be deformed, and they can be moved as a whole under the action of the lateral moving device. For example, in the passing state of the first running channel, the passing state of the second running channel, and during the switching process between the passing state of the first running channel and the passing state of the second running channel, the first swing rail and the second swing rail both maintain their shapes unchanged.

[0072] When the turnout structure adopted in this application is specifically used, a turnout diversion method composed of the following steps can be adopted:

[0073] 1) Select the passing state of the first running channel. The first swing rail 500 is locked outside the first fixed long rail 100. The second swing rail 600 first swings to the inside of the first running channel, and then is translated as a whole to be respectively locked to the second fixed long rail 200 and the first fixed short rail 300.

[0074] 2) Select the passing state of the second running channel. The second swing rail 600 is locked outside the second fixed long rail 200. The first swing rail 500 first swings to the inside of the second running channel, and then is translated as a whole to be respectively locked to the first fixed long rail 100 and the second fixed short rail 400.

[0075] The above turnout diversion method is a process of mutual switching between the passing states of the first running channel and the second running channel; specifically, during the working process, if the EMU selects the passing state of the first running channel or the passing state of the second running channel, the running channel of the turnout and the positional relationship between the fixed rail and the movable rail are first determined, and then appropriate adjustments are made as needed.

[0076] For example Figures 1 - 2 As shown, in the passing state of the first running channel, the EMU passes through the AB channel, and the first swing rail 500 swings to the outside of the first fixed long rail 100; a part of the second fixed long rail 200, the second swing rail 600 and the first fixed short rail 300 form a track parallel to the first fixed long rail 100; in the passing state of the second running channel, the EMU passes through the AC channel, and the second swing rail 600 swings to the outside of the second fixed long rail 200; a part of the first fixed long rail 100, the first swing rail 500 and the second fixed short rail 400 form a track parallel to the second fixed long rail 200. According to the conventional design of the turnout structure, the widths of the first running channel L1 and the second running channel L2 are kept the same.

[0077] The solution of this application is essentially different from the state transformation method of the existing conventional railway turnout. When the movable rail of the conventional railway is not in use, it is basically in a position transverse to the running channel; when the movable rail is in use, its port part is then moved to the connection position of the fixed rail. The solution of this application adopts a different setting method. When the swing rail is not in use, its whole body is located outside the fixed rail and is not fixedly connected to the running rail; when the swing rail is in use, a partial connection is adopted between the swing rail and the fixed rail. The solution of this application more effectively solves the problem of complex turnout structure after the suspended monorail adopts the steel wheel-rail system.

[0078] The above embodiments are only illustrative of the principles and effects of this application and are not intended to limit this application. Any person familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of this application. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the technical field without departing from the spirit and technical idea disclosed in this application should still be covered by the claims of this application.

Claims

1. A turnout structure for a suspended monorail, characterized in that, It includes a turnout beam and a swing rail; the turnout beam includes a first running channel and a second running channel, and the swing rail includes a first swing rail and a second swing rail; When the first running channel is in a passing state, the second swing rail forms a part of one side running rail of the first running channel, and the whole of the first swing rail is located outside the other side running rail of the first running channel; When the second running channel is in a passing state, the first swing rail forms a part of one side running rail of the second running channel, and the whole of the second swing rail is located outside the other side running rail of the second running channel; The first running channel is provided with a first fixed long rail and a first fixed short rail; the second running channel is provided with a second fixed short rail and a second fixed long rail; The first fixed short rail and the second fixed short rail are located between the first fixed long rail and the second fixed long rail; When the first running channel is in a passing state, the two ends of the second swing rail are respectively locked to the second fixed long rail and the first fixed short rail, and the whole of the first swing rail is located outside the first fixed long rail; a part of the second fixed long rail, the second swing rail, and the first fixed short rail form one side running rail of the first running channel, and the first fixed long rail is the other side running rail of the first running channel; When the second running channel is in a passing state, the two ends of the first swing rail are respectively locked to the first fixed long rail and the second fixed short rail, and the whole of the second swing rail is located outside the second fixed long rail; a part of the first fixed long rail, the first swing rail, and the second fixed short rail form one side running rail of the second running channel, and the second fixed long rail is the other side running rail of the second running channel; The first swing rail is located outside the first fixed long rail. The first swing rail is connected to a lateral movement device, the lateral movement device is connected to a swing device, the swing device rotates and swings in a vertical plane along a swing axis, and the lateral movement device can cause the whole of the first swing rail to move; The second swing rail is located outside the second fixed long rail. The second swing rail is connected to a lateral movement device, the lateral movement device is connected to a swing device, the swing device rotates and swings in a vertical plane along a swing axis, and the lateral movement device can cause the whole of the second swing rail to move.

2. The turnout structure according to claim 1, wherein: Several moving supports are connected below the swing rail, and the several moving supports are connected to the swing device; the swing device is provided with a swing axis, and the swing axis is arranged outside the first running channel and the second running channel.

3. The turnout structure according to claim 2, wherein: The several moving supports synchronously support the movement of the swing rail.

4. The turnout structure according to claim 1, characterized in that: In the passing state of the first running channel, the passing state of the second running channel, and the transition state between the passing state of the first running channel and the passing state of the second running channel, the shape of the swing rail remains unchanged.

5. The turnout structure according to claim 1, wherein: Rail tips are provided at both ends of the first swing rail and the second swing rail.

6. The turnout structure according to claim 1, characterized in that: The starting ends of the first fixed short rail and the second fixed short rail intersect, and a fixed frog is provided at the intersection.

7. A turnout diversion method for a suspended monorail, characterized in that: Adopting the turnout structure according to claim 1, it includes the following steps: 1) Select the passing state of the first running channel. The first swing rail is locked outside the first fixed long rail. The second swing rail first swings to the inside of the first running channel, and then is integrally translated so that its two ends are respectively locked and connected to the second fixed long rail and the first fixed short rail; 2) Select the passing state of the second running channel. The second swing rail is locked outside the second fixed long rail. The first swing rail first swings to the inside of the second running channel and then is integrally translated so that its two ends are respectively locked and connected to the first fixed long rail and the second fixed short rail.

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