Folding railway box with convex top cover and stacking method of folding railway box

Abstract

The invention discloses a folding railway box with a convex top cover and a stacking method of the folding railway box. The four corners of the bottom frame are provided with bottom corner pieces which are the same as those of a common container, the upper portion of the periphery of the bottom frame is connected with side walls and end walls, the side walls and the end walls define a frame body, the side walls and the end walls are connected with a big-end-down trapezoidal convex top cover, and a supporting frame for supporting the convex top cover is connected into the convex top cover. An upper top plate of the convex top cover is connected with the inclined top plates on the two sides in a hinged mode, the side walls and the end walls are connected with the bottom frame through a plurality of hinges, the side walls and the end walls form bendable structures with the bottom frame at the hinge positions, a plurality of power assisting devices facilitating turning up are arranged between the side walls and the bottom frame and between the end walls and the bottom frame, and power assisting devices are arranged between the tops of the side walls and the end walls and the convex top cover. The side walls and the end walls are connected through quick locking mechanisms, and lock pin devices are arranged between the bottom frame and the corner columns on the two sides of the end walls. According to the stacking method, five table boxes can be folded into a box position of one table box, and the freight of the box position can be saved by 80%.

Description

Technical Field

[0001] The invention relates to a container, in particular to a foldable railway box with a convex top cover and a stacking method thereof. Background Art

[0002] Containers have become a standard means of transport for international multimodal transport. With the new development opportunities brought by the "Silk Road on Land", rail transport has become an important mode of transport in the New Silk Road Economic Belt, which is of great significance to the trade and economic growth of countries along the route. However, due to the differences in economic development among countries, trade between some countries tends to be in a single direction, mostly imports or exports, so the return of empty containers will increase the transportation cost. This requires a container that is both safe and can be folded and stacked during return transport to reduce transportation costs. For example, my country imports cotton from Uzbekistan, but it is returned empty. In order to reduce transportation costs, foldable containers have appeared on the market, and multiple empty containers are folded and transported to reduce trade costs. For example, patent ZL202221447351.3 discloses a folding container, which includes a spiral push rod assembly installed between the top plate and the bottom plate, and a door folding connecting rod connecting the bottom plate with the front plate and the rear plate. The top plate and the bottom plate are opened and closed by the telescopic action of the spiral telescopic rod in the spiral push rod assembly. A folding connecting rod is arranged on the side plate. The mutual action between the folding connecting rod and the slide grooves on both sides of the front plate and the rear plate and the slide groove axis of the top plate and the lever principle completes the complete box folding form of the front plate and the rear plate. This box has a small volume and does not utilize the space above the tunnel. The stacking form and structure are relatively complex, the number of stacking is small, and the transportation cost is relatively high. The "Silk Road on Land" is mainly transported on land trains, and the tops of the tunnels and culverts through which the trains pass are arc-shaped. Therefore, many countries jointly formulate international railway loading limits, such as the Central Asian International Railway loading limits involving more than a dozen countries in Central Asia, and its size requirements are as follows: Figure 1 As shown. The railway loading limit can be fully utilized, and the folded empty container can be transported by rail for return trip, which is relatively low in cost. Therefore, it is necessary and important to design a container that is easy to fold and unfold and can load as much cargo and folded empty container as possible during train transportation, which is very necessary and important for reducing transportation costs. Summary of the invention

[0003] The object of the present invention is to provide a method for providing a foldable railway box with a convex top cover which has a simple structure, low manufacturing cost, reliable use, and is convenient for expanding and folding empty containers, and the folded and stacked empty containers can be loaded on a train as much as possible, and the stacked dimensions are within the loading limit of the Central Asian International Railway.

[0004] In order to achieve the above requirements, a foldable railway box with a convex top cover of the present invention is implemented as follows: it is characterized in that it includes a rectangular base frame, the four corners of the base frame have bottom corner pieces similar to those of ordinary containers, the upper part of the four sides of the base frame is connected to side walls and end walls, the side walls and the end walls form a frame-shaped body, a trapezoidal convex top cover with a small top and a large bottom is connected to the side walls and the end walls, a support frame for supporting the convex top cover is connected inside the convex top cover, the upper top plate of the convex top cover is hingedly connected to the inclined top plates on both sides, the side walls and the end walls are connected to the base frame by multiple hinges, and the side walls and the end walls are respectively connected at the hinges. The structure is bendable with the base frame, and a plurality of power-assisting devices are provided between the side wall and the base frame, and between the end wall and the base frame to facilitate flipping. The power-assisting device includes a power-assisting tension spring, one end of which is fixed on the base frame, and the other end of which is connected to a steel wire rope. The steel wire rope is turned upward through a pulley and fixed to the surface above the hinge of the side wall or the end wall. The top of the side wall and the end wall and the convex top cover, as well as the side wall and the end wall are connected through a quick locking mechanism. A locking pin device is provided between the base frame and the corner columns on both sides of the end wall to position the end wall on the base frame.

[0005] The quick locking mechanism includes a base plate fixed on a connecting piece, two upright connecting pieces are fixed on the base plate, two clamping plates are fixed on the connecting piece on both sides through a pin shaft, a rotating block is installed between the two clamping plates, rotating shafts extend from both ends of the rotating block, the rotating shafts are inserted into the axial holes of the two clamping plates, a circular hole is made on the rotating block perpendicular to the center line of the rotating shaft, a screw with a hook at the front end is inserted into the circular hole, nuts matching the threads on the screw are screwed on the screws before and after the rotating block, and the tail ends of the two clamping plates are fixed by an annular sleeve, the hook at the front end of the screw is used to hook the annular chain, hook or rod on the other connecting piece, and the two connecting pieces are tightened and fixed by adjusting the length of the screw through the two nuts.

[0006] The locking pin device is that an upper sleeve is fixed in the lower ends of the two corner columns of the end wall and passes through the lower surface to form a positioning hole, a lower sleeve is fixed on the bottom frame corner column opposite to the positioning hole, a positioning pin matching the positioning hole is inserted in the lower sleeve, a locking handle is fixed on the side of the positioning pin, and a compression spring is sleeved on the positioning pin between the locking handle and the upper bottom plate of the bottom frame corner column. When the locking handle is lifted and the positioning pin is raised and inserted into the positioning hole, an upper positioning plate for placing the locking handle is fixed on the bottom frame corner column next to the height position of the locking handle. The upper positioning plate is shape.

[0007] When the positioning pin of the locking pin device descends to the upper surface of the upper base plate without exposing the base frame corner column, a lower positioning plate for placing the locking handle is fixed on the base frame. The lower positioning plate has the same shape as the upper positioning plate, but is different in height from the base frame.

[0008] U-shaped lifting rings for lifting are fixed on the outer surfaces of the side upper beams of the side walls, the end upper beams of the end walls, the upper top plate and the inclined top plate, wherein the ∪-shaped lifting rings on the upper top plate and the inclined top plate are U-shaped lifting rings that can be overturned.

[0009] The bottom frame is provided with a grasping groove for hoisting and a slot for forklift fork feet to be inserted and lifted.

[0010] The upper surface of the base frame is paved with a wooden floor.

[0011] The side wall is provided with a box door.

[0012] The length of the chassis is the same as that of a 40-foot container.

[0013] The stacking method of the convex top cover foldable railway box is characterized in that five empty convex top cover foldable railway boxes of the same size are folded and packed into an outer size less than or equal to that of one convex top cover foldable railway box or not exceeding the loading limit of the Central Asian International Railway, and the steps are:

[0014] A. Separation and folding of convex top covers: Open the connection of the quick locking mechanism between the side wall and the end wall and the convex top cover, lift the convex top cover, separate the main box from the convex top cover, and remove the support frame; among the five convex top covers to be packaged, fold three of them around the hinges: the top plate and an inclined top plate are flattened, and the other inclined top plate is bent under the top plate, which is set as component A; disassemble the remaining two convex top covers: the top plate and an inclined top plate are flattened around the hinges, which is set as component B; the other inclined top plate is separated from the top plate, and the separated inclined top plate is set as component C;

[0015] B. Folding of the side walls, end walls and bottom frame: release the connection of the quick locking mechanism between the side walls and the end walls, use the hinges and power-assisting device to slowly bend and level the two side walls toward the bottom of the box, and complete the folding of the two side walls in sequence; then place the locking handle on the upper positioning plate onto the lower positioning plate, and the positioning pins drop below the upper surface of the bottom frame corner column, release the positioning of the end wall by the positioning pins, use the hinges and power-assisting device to slowly bend the end wall toward the bottom of the box, and press it on the bent side wall to fix the end wall and the side wall, and place multiple support frames removed from the convex top cover on the side wall between the two end walls, and they must not be higher than the upper surface of the stacked end walls and be fixed. This setting is the D component;

[0016] C. Stacking of components: The order of stacking from bottom to top is 5 D components, 3 A components, 2 B components, and 2 C components. Each adjacent D component is fixed with bolts. After the entire component is stacked, it is tied with tie wraps to prevent movement.

[0017] A foldable railway box with a convex top cover and a stacking method thereof designed according to the above scheme fully utilize the space of the international railway loading limit. During return transportation, 5 boxes are folded and packed to occupy only the space of 1 box, that is, the return freight can save 80% of the space freight. It can be stacked in more quantities than ordinary foldable containers, especially in structural design. A plurality of spring assist devices are provided between the side wall and the bottom frame, and between the end wall and the bottom frame to facilitate tipping and folding buffering. When the assist tension springs are installed when the side walls and the end walls are tipped up, a certain pre-tension is given. When the boxes are tipped over and folded together, the tension of the assist tension springs is greater. When the pressure on the side walls and the end walls is relieved, the walls can be tipped up more easily under the action of the assist tension springs. A reliable and convenient quick locking mechanism is used between each connecting piece, and according to different connection requirements, the hook is selected to connect with the ring chain or hook or rod. For example, the overlap with the ring chain is suitable for the connection of two connection points with a certain angle. When used in the connection between the convex top cover and the side wall and the end wall, the manufacturing and installation errors of the convex top cover and the side wall and the end wall can be overcome; when the hook is overlapped with the rod, the two connecting pieces can be accurately connected. When used in the connection between the side wall and the end wall, the correctness and tightness of the connection position of the side wall and the end wall can be ensured, and gaps and misalignments can be prevented. A convenient locking pin device is used for the positioning of the end wall and the bottom frame, which ensures that the end wall of the entire main box body is accurately and quickly positioned on the bottom frame. When the stacked boxes arrive at the return destination, the folded boxes can be easily restored to the empty box state when loading by the reverse operation of the stacking method of the convex top cover foldable railway box mentioned above. This is for long-distance transportation, especially cross-border trade, and its economic value cannot be underestimated. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is the loading limit map of the Central Asian International Railway;

[0019] Figure 2 It is a front view of a folding railway box with a convex top cover;

[0020] Figure 3 yes Figure 2 Left-view enlarged image of ;

[0021] Figure 4 yes Figure 2 A top view of

[0022] Figure 5 yes Figure 3 Sectional view of AA in the middle;

[0023] Figure 6 yes Figure 2 A magnified cross-sectional view of the middle BB;

[0024] Figure 7 yes Figure 2 Cross-sectional view of CC;

[0025] Figure 8 yes Figure 6 A partial enlarged view of E1 in the middle;

[0026] Fig. 9 yes Figure 5 A partial enlarged view of E2 in the middle;

[0027] Fig.10 yes Figure 2 A4 partial enlarged view;

[0028] Fig.11 yes Figure 2 A partial enlarged view of the A5;

[0029] Fig.12 yes Figure 6 A partial enlarged view of B2 in the middle;

[0030] Fig.13 yes Figure 6 A partial enlarged view of B3 in the middle;

[0031] Fig.14 yes Figure 2 A partial enlarged view of A1 in the middle;

[0032] Fig.15 yes Figure 3 A partial enlarged view of A2 in the middle;

[0033] Fig.16 yes Figure 4 A partial enlarged view of A3 in the middle;

[0034] Fig.17 It is a state diagram of lifting the convex top cover by using a U-shaped lifting ring that can be overturned and when the U-shaped lifting ring plate is raised;

[0035] Fig.18 yes Figure 7 After removing the wooden floor on the chassis, the distribution diagram of the power assist device on the chassis is reflected;

[0036] Fig.19 yes Fig.18 A partial enlarged view of the middle C1 region;

[0037] Fig. 20 yes Figure 6 A partial enlarged view of the middle C2 area;

[0038] Fig.21 yes Fig.18 A partial enlarged view of the middle C3 region;

[0039] Fig. 22 yes Figure 5 A partial enlarged view of the middle C4 region;

[0040] Fig.23yes Figure 5 A partial enlarged view of the middle B1 area;

[0041] Fig.24 yes Figure 6 The B2 area in the middle shows a partial enlarged view of the quick locking mechanism between the convex top cover and the end wall;

[0042] Fig.25 yes Figure 5 A partial enlarged view of the middle B4 area;

[0043] Fig.26 yes Figure 6 A partial enlarged view of the middle B5 area;

[0044] Fig. 27 yes Figure 5 A partial enlarged view of the middle D1 area;

[0045] Fig.28 yes Figure 7 A partial enlarged view of the middle D2 area;

[0046] Fig.29 yes Figure 3 A magnified partial cross-section of the middle F1 region;

[0047] Fig.30 yes Fig.29 Cross-sectional view of middle HH;

[0048] Fig.31 yes Fig.29 The state diagram when the locking handle in is pulled up and rotated to separate from the upper positioning plate;

[0049] Fig.32 yes Fig.31 The cross-sectional view of H2-H2;

[0050] Fig.33 yes Fig.31 The locking handle is lowered to the lower positioning plate, and the positioning pin is lowered and separated from the positioning hole;

[0051] Fig.34 yes Fig.33 The cross-sectional view of H3-H3;

[0052] Fig.35 is the front view of the convex top cover;

[0053] Fig.36 It is the main view of the support frame;

[0054] Fig.37 It is a connection diagram of the top plate and two inclined top plates after the support frame is removed in the convex top cover;

[0055] Fig.38 This is a diagram showing the top plate and two inclined top plates after they are folded;

[0056] Fig.39 It is a state diagram after the top plate and an inclined top plate are folded;

[0057] Fig.40 This is a state diagram of a sloping top plate;

[0058] Fig.41 is a front view of a folding railway box with a convex top cover after the convex top cover is removed;

[0059] Fig.42 yes Fig.41 The main view after the two side walls in the middle are bent toward the bottom of the box and laid flat;

[0060] Fig.43 yes Fig.42 A top view of the two end walls of the box being bent toward the bottom and pressed against the two side walls, and multiple support frames being placed on the side walls between the two end walls;

[0061] Fig.44 yes Fig.43 A cross-sectional view of KK;

[0062] Fig.45 yes Fig.44 A partial enlarged view of the middle C5 region;

[0063] Fig.46 There are 5 D components (i.e. Fig.43 Components) main view after stacking;

[0064] Fig.47 yes Fig.46 A local magnified image of the middle G1 region;

[0065] Fig.48 This is an enlarged left view of five empty convex-top folding railway boxes after they are disassembled and stacked;

[0066] Fig.49 yes Fig.48 Comparative chart within the loading limits of the Central Asian international railway.

[0067] In the figure: 1. bottom frame; 2. bottom corner piece; 3. wooden floor; 4. hinge; 5. side wall; 6. end wall; 7. grip groove; 8. slot; 9. door; 10. convex top cover; 11. support frame; 12. top plate; 13. inclined top plate; 14. side upper beam; 15. end upper beam; 16. U-shaped lifting ring; 17. U-shaped lifting ring that can be overturned; 18. power assist device; 19. power assist tension spring; 20. wire rope; 21. pulley; 22. quick locking mechanism; 23. bottom plate; 24. connecting piece; 25 . Pin shaft; 26. Clamp plate; 27. Rotating block; 28. Rotating shaft; 29. ​​Axis hole; 30. Round hole; 31. Hook; 32. Screw; 33. Nut; 34. Annular sleeve; 35. Annular chain; 36. Rod; 37. Corner column; 38. Locking pin device; 39. Upper sleeve; 40. Positioning hole; 41. Corner column of base frame; 42. Lower sleeve; 43. Positioning pin; 44. Locking handle; 45. Upper base plate; 46. Compression spring; 47. Upper positioning plate; 48. Lower positioning plate; 49. Bolt; 50. Inner frame line; 51. Outer frame line. DETAILED DESCRIPTION

[0068] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0069] Figures 2 to 6 The schematic diagram of the structure of the convex top cover foldable railway box shows that it includes a rectangular base frame 1, the length of the base frame 1 is the same as that of a 40-foot container, the four corners of the base frame 1 are provided with bottom corner pieces 2 which are the same as those of ordinary containers, and the upper surface of the base frame 1 is paved with a wooden floor 3. Figure 7 As shown, the upper part of the four sides of the base frame 1 is connected to the side wall 5 through a plurality of hinges 4. Figure 8 As shown and the end wall 6 as Fig. 9 As shown, the side wall 5 and the end wall 6 form a frame, and the bottom frame 1 is provided with a grab groove 7 for hoisting. Fig.10 As shown and for the forklift fork foot to insert the raised slot 8 Fig.11 As shown. The side wall 5 and the end wall 6 are respectively connected to the bottom frame 1 at the hinge 4 to form a bendable structure, wherein the side wall 5 is provided with a box door 9. A trapezoidal convex top cover 10 with a small top and a large bottom is connected to the side wall 5 and the end wall 6, and a support frame 11 for supporting the convex top cover 10 is connected inside the convex top cover 10. The upper top plate 12 of the convex top cover 10 is connected to the inclined top plates 13 on both sides by hinges, as shown in FIG. Fig.12 , Fig.13 The side upper beam 14 of the side wall 5 and the end upper beam 15 of the end wall 6 are fixed with U-shaped lifting rings 16 for lifting. Fig.14 , Fig.15 As shown, a U-shaped lifting ring 17 capable of tipping over for lifting is fixed on the outer surface of the upper top plate 12 and the inclined top plate 13. Fig.16 , Fig.17 shown.

[0070] A plurality of assisting devices 18 are provided between the side wall 5 and the bottom frame 1, and between the end wall 6 and the bottom frame 1 to facilitate the turning up. Figures 18 to 22 As shown, it includes a booster spring 19, one end of which is fixed on the base frame 1, and the other end of the booster spring 19 is connected to a steel wire rope 20, which is turned upward through a pulley 21 and fixed to the surface above the hinge 4 of the side wall 5 or the end wall 6.

[0071] The top of the side wall 5 and the end wall 6 are connected to the convex top cover 10 by a quick locking mechanism 22. Figure 23 to Figure 26 As shown, the side wall 5 and the end wall 6 are also connected by a quick locking mechanism 22. Figure 27 to Figure 28 As shown, the quick locking mechanism 22 includes a base plate 23 fixed on a connecting member, two upright connecting plates 24 are fixed on the base plate 23, two clamping plates 26 are fixed on both sides of the connecting plate 24 through a pin 25, a rotating block 27 is installed between the two clamping plates 26, a rotating shaft 28 extends from both ends of the rotating block 27, the rotating shaft 28 is inserted into the axial holes 29 of the two clamping plates 26, and a circular hole 30 is formed on the rotating block 27 perpendicular to the center line of the rotating shaft 29, a screw rod 32 with a hook 31 at the front end is inserted into the circular hole 30, nuts 33 matching the threads on the screw rod 32 are screwed on the screw rods 32 before and after the rotating block 27, and the tail ends of the two clamping plates 26 are fixed by an annular sleeve 34, and the hook 31 at the front end of the screw rod 32 hooks the annular chain 35 on the other connecting member as shown in FIG. Figure 23 to Figure 26 As shown or rod 36 as Figure 27 to Figure 28 As shown or hook (not shown in the figure), and the length of the screw rod 32 is adjusted by two nuts 33 to tighten and fix the two connecting parts.

[0072] A locking pin device 38 is provided between the base frame 1 and the corner columns 37 on both sides of the end wall 6 to position the end wall 6 on the base frame 1. The locking pin device 38 is as shown in FIG. Figures 29 to 34 As shown, an upper sleeve 39 is fixed in the lower end of the two corner columns 37 of the end wall 6 and passes through the lower surface to form a positioning hole 40, a lower sleeve 42 is fixed on the bottom frame corner column 41 opposite to the positioning hole 40, a positioning pin 43 matching the positioning hole 40 is inserted in the lower sleeve 42, a locking handle 44 is fixed on the side of the positioning pin 43, and a compression spring 46 is sleeved on the positioning pin 43 between the locking handle 44 and the upper bottom plate 45 of the bottom frame corner column. When the locking handle 44 is lifted, the positioning pin rises and is inserted into the positioning hole 40, an upper positioning plate 47 for placing the locking handle 44 is fixed on the bottom frame corner column 41 next to the height position of the locking handle 44. The upper positioning plate 47 is When the positioning pin 43 is lowered to the upper surface of the upper bottom plate 45 without exposing the bottom frame corner column 41, a lower positioning plate 48 is fixed on the bottom frame 1 for placing the locking handle 44. The lower positioning plate 48 has the same shape as the upper positioning plate 47, but the height of the bottom frame 1 is different. Figure 33 to Figure 34shown.

[0073] The stacking method of the convex top cover foldable railway box is to fold and pack the above five empty convex top cover foldable railway boxes of the same size into a size less than or equal to the outer size of one convex top cover foldable railway box or not exceeding the loading limit of the Central Asian International Railway, and the steps are:

[0074] A. Separation and folding of the convex top cover 10: Open the connection between the side wall 5 and the end wall 6 and the convex top cover 10 with the quick locking mechanism 22, lift the convex top cover 10, separate the main box body (bottom frame 1, side wall 5, end wall 6) from the convex top cover 10, and remove the support frame 11 as shown in FIG. Figure 35 to Figure 37 In the five convex top covers 10 to be packed, three of the convex top covers 10 are folded around the hinges: the top plate 12 and the inclined top plate 13 are flattened, and the other inclined top plate 13 is bent under the top plate 12 as shown Fig.38 As shown, this is set as component A; the remaining two convex top covers 10 are disassembled into: the top plate 12 and the inclined top plate 13 are flattened around the hinge as shown Fig.39 As shown, this is set as component B; another inclined top plate 13 is separated from the top plate 12, and the separated inclined top plate 13 is as shown Fig.40 The setting shown is for C component;

[0075] B. Folding of the side wall 5, the end wall 6 and the bottom frame 1: The main box body after removing the convex top cover 10 is as follows Fig.41 As shown, the connection between the side wall 5 and the end wall 6 is released by the quick locking mechanism 22, and the two side walls 5 are slowly bent toward the bottom of the box and laid flat by using the hinge 4 and the power assist device 18, and the folding of the two side walls 5 is completed in sequence. Fig.42 Then place the locking handle on the upper positioning plate 47 on the lower positioning plate 48, and the positioning pin 43 is lowered to below the upper surface of the bottom frame corner column 41, and the positioning pin 43 is released to position the end wall 6 as shown Figure 33 to Figure 34 As shown, the end wall 6 is slowly bent toward the bottom of the box by using the hinge 4 and the assisting device 18, and is pressed on the bent side wall 5, so that the end wall 6 and the side wall 5 are fixed, and a plurality of support frames 11 removed from the convex top cover 10 are placed on the side wall 5 between the two end walls 6, and are not higher than the upper surface of the stacked end wall 6 and are fixed, as shown in FIG. Figures 43 to 45 As shown, this setting is the D component;

[0076] C. Stacking of components: The order of stacking is 5 D components stacked from bottom to top. Fig.46 , wherein each adjacent D assembly is fixed by bolts 49 as shown in Fig.47 As shown in the figure, there are 3 A components, 2 B components, and 2 C components, and finally they are tied with tie bands to prevent them from moving relative to each other. The shape and size of the entire assembly after stacking is as follows Fig.48 As shown, the loading limit of the Central Asian International Railway is as follows Fig.49As shown, the inner frame line 50 is the outline figure after stacking, and the outer frame line 51 is the loading limit of the Central Asian International Railway, which can fully meet the transportation requirements of the Central Asian International Railway with a railway gauge of 1520 mm.

Claims

1. A foldable railway box with a convex top cover, characterized in that The container comprises a rectangular bottom frame, the four corners of which are provided with bottom corner pieces identical to those of ordinary containers, the upper part of the four sides of the bottom frame being connected with side walls and end walls, the side walls and the end walls forming a frame-shaped body, the side walls and the end walls being connected with a trapezoidal convex top cover which is smaller at the top and larger at the bottom, the convex top cover being connected with a supporting frame for supporting the convex top cover, the upper top plate of the convex top cover being hingedly connected with the inclined top plates on both sides, the side walls and the end walls being connected with the bottom frame through a plurality of hinges, the side walls and the end walls being respectively connected with the bottom frame at the hinges to form a bendable structure, A plurality of assisting devices are provided between the frame, the end wall and the base frame to facilitate the flipping. The assisting device comprises an assisting tension spring, one end of which is fixed on the base frame, and the other end of which is connected to a steel wire rope. The steel wire rope is turned upward through a pulley and fixed to the surface above the hinge of the side wall or the end wall. The top of the side wall and the end wall and the convex top cover, as well as the side wall and the end wall are connected through a quick locking mechanism. A locking pin device is provided between the base frame and the corner columns on both sides of the end wall to position the end wall on the base frame.

2. A foldable railway box with a convex top cover according to claim 1, characterized in that The quick locking mechanism includes a base plate fixed on a connecting piece, two upright connecting pieces are fixed on the base plate, two clamping plates are fixed on the connecting piece on both sides through a pin shaft, a rotating block is installed between the two clamping plates, rotating shafts extend from both ends of the rotating block, the rotating shafts are inserted into the axial holes of the two clamping plates, a circular hole is made on the rotating block perpendicular to the center line of the rotating shaft, a screw with a hook at the front end is inserted into the circular hole, nuts matching the threads on the screw are screwed on the screws before and after the rotating block, and the tail ends of the two clamping plates are fixed by an annular sleeve, the hook at the front end of the screw is used to hook the annular chain, hook or rod on the other connecting piece, and the two connecting pieces are tightened and fixed by adjusting the length of the screw through the two nuts.

3. A foldable railway box with a convex top cover according to claim 1, characterized in that The locking pin device is that an upper sleeve is fixed in the lower ends of the two corner columns of the end wall and passes through the lower surface to form a positioning hole, a lower sleeve is fixed on the bottom frame corner column opposite to the positioning hole, a positioning pin matching the positioning hole is inserted in the lower sleeve, a locking handle is fixed on the side of the positioning pin, and a compression spring is sleeved on the positioning pin between the locking handle and the upper bottom plate of the bottom frame corner column. When the locking handle is lifted and the positioning pin is raised and inserted into the positioning hole, an upper positioning plate for placing the locking handle is fixed on the bottom frame corner column next to the height position of the locking handle. The upper positioning plate is shape.

4. A foldable railway box with a convex top cover according to claim 3, characterized in that When the positioning pin of the locking pin device descends to the upper surface of the upper base plate without exposing the base frame corner column, a lower positioning plate for placing the locking handle is fixed on the base frame. The lower positioning plate has the same shape as the upper positioning plate, but is different in height from the base frame.

5. The foldable railway box with a convex top cover according to claim 1 is characterized in that U-shaped lifting rings for lifting are fixed on the outer surfaces of the side upper beams of the side walls, the end upper beams of the end walls, the upper top plate and the inclined top plate, wherein the U-shaped lifting rings on the upper top plate and the inclined top plate are overturnable U-shaped lifting rings.

6. The foldable railway box with a convex top cover according to claim 1, characterized in that The bottom frame is provided with a grasping groove for hoisting and a slot for forklift fork feet to be inserted and lifted.

7. A disassembly and assembly rack for disassembling and assembling an expandable container-type house, characterized in that The upper surface of the base frame is paved with a wooden floor.

8. The foldable railway box with a convex top cover according to claim 1 is characterized by: The side wall is provided with a box door.

9. The foldable railway box with a convex top cover according to claim 1, characterized in that The length of the chassis is the same as that of a 40-foot container.

10. A method for stacking convex top cover foldable railway boxes, characterized in that The steps of folding and packing five empty convex top folding railway boxes of the same size into a size less than or equal to the outer dimensions of one convex top folding railway box or not exceeding the loading limit of the Central Asia International Railway are: A. Separation and folding of convex top covers: Open the connection of the quick locking mechanism between the side wall and the end wall and the convex top cover, lift the convex top cover, separate the main box from the convex top cover, and remove the support frame; among the five convex top covers to be packaged, fold three of them around the hinges: the top plate and an inclined top plate are flattened, and the other inclined top plate is bent under the top plate, which is set as component A; disassemble the remaining two convex top covers: the top plate and an inclined top plate are flattened around the hinges, which is set as component B; the other inclined top plate is separated from the top plate, and the separated inclined top plate is set as component C; B. Folding of the side walls, end walls and bottom frame: release the connection of the quick locking mechanism between the side walls and the end walls, use the hinges and power-assisting device to slowly bend and level the two side walls toward the bottom of the box, and complete the folding of the two side walls in sequence; then place the locking handle on the upper positioning plate onto the lower positioning plate, and the positioning pins drop below the upper surface of the bottom frame corner column, release the positioning of the end wall by the positioning pins, use the hinges and power-assisting device to slowly bend the end wall toward the bottom of the box, and press it on the bent side wall to fix the end wall and the side wall, and place multiple support frames removed from the convex top cover on the side wall between the two end walls, and they must not be higher than the upper surface of the stacked end walls and be fixed. This setting is the D component; C. Stacking of components: The order of stacking from bottom to top is 5 D components, 3 A components, 2 B components, and 2 C components. Each adjacent D component is fixed with bolts. After the entire component is stacked, it is tied with tie wraps to prevent movement.

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