Frame box
By introducing movable movable angle columns and drive components into the frame box, the problems of low transportation efficiency and large site occupation caused by the height of the corner columns of the frame box are solved, and efficient transportation and safe railway transportation are achieved.
Patent Information
- Application Number
- CN202421242480.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-31
- Publication Date
- 2025-01-10
- Estimated Expiration
- 2034-05-31
AI Technical Summary
The existing frame box corner columns have fixed heights and cannot be stacked during railway transportation, resulting in large occupancy of the site and cannot be lifted through container spreaders when transporting two-story vehicles, affecting transportation efficiency.
A frame box including fixed angle columns and movable angle columns is designed. The movable angle columns are movable in the vertical direction, and the height adjustment is achieved through the drive assembly. They can be lifted by a sling and can be lower than the top of the vehicle during railway transportation, avoiding collisions. .
It realizes efficient transportation of frame boxes and saves space, improves transportation efficiency, and ensures the safety of railway transportation and the convenience of lifting.
Smart Images

Figure CN222330535U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of logistics equipment, in particular to a frame box. Background Art
[0002] The main modes of transportation for commercial vehicles in my country are road transportation, rail transportation and water transportation. For rail transportation, commercial vehicles are mainly transported by JSQ type special railway transportation vehicles. They can meet the transportation needs of various types of commercial vehicles, with an annual transportation capacity of more than 7 million vehicles.
[0003] However, JSQ-type special railway transport vehicles cannot be stacked and occupy a large area of railway stations when idle, affecting the storage and turnover of large quantities of commercial vehicles.
[0004] For this reason, the commercial vehicles are transported by rail in flat rack containers, so that when they are idle, the flat rack containers can be stacked to reduce the space occupied by the railway yard.
[0005] The height of the corner posts of the existing frame boxes is fixed. When used to transport two-layer vehicles, in order to prevent the corner posts from exceeding the railway limit, the height of the corner posts of the frame boxes located on the upper layer needs to be reduced. In this way, the upper end of the corner post of the frame box located on the upper layer is lower than the top end of the vehicle located on the upper layer. As a result, the frame box cannot be lifted by the container lifter.
[0006] Therefore, the utility model provides a frame box to at least partially solve the above problems. Utility Model Content
[0007] A series of simplified concepts are introduced in the utility model content section, which will be further described in detail in the specific embodiments section. The utility model content section of the utility model does not mean to attempt to define the key features and essential technical features of the technical solution claimed for protection, nor does it mean to attempt to determine the scope of protection of the technical solution claimed for protection.
[0008] In order to at least partially solve the above technical problems, the utility model provides a frame box, which includes:
[0009] The first one;
[0010] A second frame, the second frame is located above the first frame and is spaced apart from the first frame;
[0011] A fixed corner post, the bottom end of which is connected to the first frame, and the fixed corner post is connected to the second frame;
[0012] The movable corner post is movably connected to the fixed corner post in the vertical direction.
[0013] According to the frame box of the utility model, the arrangement of the first frame and the second frame enables the frame box to transport at least two layers of vehicles, and the transportation efficiency is high; in addition, the arrangement of the movable corner columns and the fixed corner columns enables the frame box loaded with vehicles to be hoisted by a sling and transported by rail.
[0014] Optionally, the movable corner post is passed through the fixed corner post.
[0015] Optionally, the movable corner post has a first operating portion, and the first operating portion extends outside the fixed corner post.
[0016] Optionally, the frame box further comprises a driving assembly, wherein the driving assembly is connected to the fixed corner post and the movable corner post to drive the movable corner post to move.
[0017] Optionally, the drive assembly is located within the fixed corner post.
[0018] Optionally, the frame box further comprises a second operating portion, which extends outside the fixed corner column to drive the driving assembly to work.
[0019] Optionally, the driving assembly is detachably arranged, and the fixed corner column has a maintenance notch arranged corresponding to the driving assembly.
[0020] Optionally, the fixed corner column has a first limiting hole, the movable corner column has a second limiting hole, and the frame box further includes a limiting pin, which is passed through the first limiting hole and the second limiting hole to fix the movable corner column to the fixed corner column.
[0021] Optionally, the limiting pin has an extending and protruding limiting operating portion.
[0022] Optionally, the frame box further comprises a limit member, which is rotatably arranged and can be rotated to a blocking position to be located to the side of the limit operating part, thereby blocking the limit operating part and further blocking the limit pin from moving away from the second limit hole.
[0023] Optionally, the frame box further comprises a limit reset member, which is connected to the limit member to apply a force to the limit member to move the limit member toward the blocking position.
[0024] Optionally, the second bracket is located between the top and bottom ends of the fixed corner post, and / or
[0025] The top of the movable corner post is located above the second frame
[0026] Optionally, a movable top corner piece is provided at the top end of the movable corner post, a bottom corner piece is provided at the bottom end of the fixed corner post, and a headband piece for blocking the movable top corner piece is provided at the top end of the fixed corner post.
[0027] Optionally, the movable corner post is movable between a first position and a second position in a vertical direction, the position of the movable corner post at the second position is lower than the position of the movable corner post at the first position, and when the movable corner post is at the second position, the dimension between the top surface of the movable corner post and the bottom surface of the bottom corner piece is less than or equal to 3570 mm. BRIEF DESCRIPTION OF THE DRAWINGS
[0028] In order to make the advantages of the utility model more easily understood, the utility model briefly described above will be described in more detail by referring to the specific embodiments shown in the accompanying drawings. It can be understood that these drawings only depict typical embodiments of the utility model and should not be considered as limiting the scope of protection thereof. The utility model is described and explained with additional characteristics and details through the accompanying drawings.
[0029] Figure 1 It is a schematic front view of a frame box according to a preferred embodiment of the utility model;
[0030] Figure 2 for Figure 1 A schematic front view of a two-layer vehicle for transporting a flat rack container, wherein the movable corner post is located in a first position;
[0031] Figure 3 for Figure 1 A schematic front view of a two-layer flat rack transport vehicle, wherein the movable corner post is located at a second position;
[0032] Figure 4 for Figure 1 A schematic side view of a flat rack transport two-layer vehicle with a movable corner post in a second position showing the boundary of the railway limit;
[0033] Figure 5 for Figure 1 A three-dimensional schematic diagram of a corner column assembly of a frame box, and a connection between a first frame and a second frame;
[0034] Figure 6 for Figure 1 Another three-dimensional schematic diagram of the corner column assembly of the frame box and the connection between the first frame and the second frame;
[0035] Figure 7 for Figure 6 A partial enlarged schematic diagram of the corner column assembly of the frame box and the A where the first frame and the second frame are connected; and
[0036] Figure 8 for Figure 6 Schematic diagram of the movable corner column of the frame box.
[0037] Description of Reference Numerals
[0038] 110: Corner post assembly 111: Fixed corner post
[0039] 112: Movable corner column 113: Repair gap
[0040] 114: First limit hole 115: Avoidance hole
[0041] 116: movable body 117: second limiting hole
[0042] 118: first operating part 120: movable top corner piece
[0043] 121: Bottom corner piece 122: Headband piece
[0044] 130: driving assembly 131: second operating part
[0045] 140: Limit pin 141: Limit operation part
[0046] 142: Limiting piece 143: Limiting reset piece
[0047] 144: Mounting seat 150: First frame
[0048] 160: Second vehicle 170: First vehicle
[0049] 171: Second vehicle 180: Boundary
[0050] 190: Guardrail 191: Perforated steel floor
[0051] 192: Ladder 193: Mobile reset part DETAILED DESCRIPTION
[0052] In the following description, a large number of specific details are given to provide a more thorough understanding of the present invention. However, it is obvious to those skilled in the art that the present invention can be implemented without one or more of these details. In other examples, in order to avoid confusion with the present invention, some technical features known in the art are not described.
[0053] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be noted that the terms "upper", "lower" and similar expressions used herein are only for the purpose of illustration and are not intended to be limiting.
[0054] In this document, ordinal numbers such as “first” and “second” cited in the present invention are merely identifiers and do not have any other meanings, such as a specific order.
[0055] In order to thoroughly understand the implementation of the utility model, a detailed structure will be presented in the following description. Obviously, the implementation of the utility model is not limited to the specific details familiar to those skilled in the art. The preferred implementation of the utility model is described in detail below, but in addition to these detailed descriptions, the utility model can also have other implementations.
[0056] The utility model provides a frame box. The frame box can be a 50-foot box. The frame box has a two-layer structure. Both layers of the frame box can be used to transport vehicles. The corner column assembly 110 of the frame box can be telescopic. In this way, when the frame box is loaded with a vehicle, if it is necessary to hoist the frame box, the top of the corner column assembly 110 is positioned higher than the top of the vehicle located on the upper layer, so that the corner column assembly 110 can be connected by a hoist for hoisting. When the frame box loaded with a vehicle is transported by rail, the top of the corner column assembly 110 can be made lower than the top of the vehicle located on the upper layer, so as to avoid collision between the corner column assembly 110 and objects on both sides of the railway (such as the top wall of a railway tunnel, etc.) during the railway transportation.
[0057] Please refer to Figures 1 to 8 The frame box includes a first frame 150 and a second frame 160. The structures of the first frame 150 and the second frame 160 are substantially the same as the structure of the bottom frame of the container.
[0058] The second rack 160 is located directly above the first rack 150. The second rack 160 is spaced apart from the first rack 150. The length directions of the first rack 150 and the second rack 160 are parallel. The width directions of the first rack 150 and the second rack 160 are parallel.
[0059] Please continue to refer to Figures 1 to 8 , the frame box further includes a corner column assembly 110. The corner column assembly 110 includes a fixed corner column 111. The bottom end of the fixed corner column 111 is connected to the first frame 150. The fixed corner column 111 is connected to the second frame 160. In this way, the fixed corner column 111, the first frame 150 and the second frame 160 form a substantially rectangular parallelepiped structure. In this way, the first frame 150 and the second frame 160 form a two-layer structure. Both the first frame 150 and the second frame 160 can be used to carry vehicles. For example, the first frame 150 is used to carry a first vehicle 170. The second frame 160 is used to carry a second vehicle 171. The height of the second vehicle 171 can be greater than the height of the first vehicle 170.
[0060] It will be appreciated that in an embodiment not shown, the height of the second vehicle may be equal to or less than the height of the first vehicle.
[0061] like Figures 1 to 8As shown, the corner post assembly 110 further includes a movable corner post 112. The length direction of the movable corner post 112 and the length direction of the fixed corner post 111 are both parallel to the vertical direction. The movable corner post 112 is connected to the fixed corner post 111. The movable corner post 112 is movable in the vertical direction relative to the fixed corner post 111. The position of the top end of the movable corner post 112 is higher than the position of the top end of the fixed corner post 111. In this way, the movable corner post 112 can move between the first position and the second position.
[0062] like Figure 2 and Figure 6 As shown, when the movable corner post 112 is located at the first position, the height dimension of the whole formed by the movable corner post 112 and the fixed corner post 111 is the first dimension. Figures 3 to 5 As shown, when the movable corner post 112 is located at the second position, the height dimension of the whole formed by the movable corner post 112 and the fixed corner post 111 is the second dimension. The first dimension is greater than the second dimension.
[0063] In this way, when the frame box loaded with the vehicle needs to be hoisted by the hoist, the movable corner post 112 can be located at the first position. In this way, the top end of the movable corner post 112 is located higher than the top of the vehicle located on the second frame 160. The hoist can connect the top end of the movable corner post 112. When the movable corner post 112 is located at the first position, the frame boxes can also be stacked.
[0064] When the frame box loaded with vehicles needs to be transported by rail, the movable corner post 112 can be placed in the second position. Figure 4 As shown, at this time, along the vertical direction, the dimension between the top surface of the corner post assembly 110 (the top surface of the movable top corner piece 120 described later) and the bottom surface of the bottom corner piece 121 described later is not greater than the preset dimension. The preset dimension can be determined according to the railway boundary. For example, the preset dimension ranges from 3500 mm to 3600 mm. Further, the preset dimension can be 3570 mm. In this way, the corner post assembly 110 and the boundary 180 described later are prevented from overlapping, thereby preventing the corner post assembly 110 from being bumped during transportation, and ensuring the safety of transportation by railway.
[0065] Railway limits refer to the outline dimension lines (boundary 180) that cannot be crossed between buildings, equipment and locomotives and vehicles on the line to ensure transportation safety. There are two types: building approach limits and locomotive and vehicle limits, collectively known as the basic railway limits. The former is the outline line that buildings on both sides of the railway line are not allowed to intrude; the latter is the outline line that locomotives and vehicles themselves and the goods they carry are not allowed to cross, and a certain gap should be left between the two.
[0066] In this embodiment, the arrangement of the first frame 150 and the second frame 160 enables the frame box to transport at least two layers of vehicles, and the transportation efficiency is high; in addition, the arrangement of the movable corner column 112 and the fixed corner column 111 enables the frame box loaded with vehicles to be hoisted by a sling and transported by rail.
[0067] Alternatively, if Figure 5 and Figure 6 As shown, the movable corner post 112 is inserted through the fixed corner post 111. In this way, the structure of the frame box is simple.
[0068] It can be understood that in an embodiment not shown, the movable corner post can be located to the side of the fixed corner post in the horizontal direction.
[0069] Please refer to Figure 5 and Figure 6 ,as well as Figure 8 The movable corner post 112 has a movable body 116 and a first operating portion 118. The movable body 116 is inserted into the fixed corner post 111. The first operating portion 118 is formed by the movable body 116 extending outward horizontally. The fixed corner post 111 has an avoidance hole 115. The first operating portion 118 passes through the avoidance hole 115 and extends outside the fixed corner post 111. In this way, the first operating portion 118 can be moved up and down by a forklift, thereby moving the movable corner post 112 between the first position and the second position. In this way, when the drive assembly 130 described later fails, the first operating portion 118 can be moved up and down by a forklift.
[0070] Preferably, the first operating portion 118 is connected to the lower end of the movable body 116 .
[0071] like Figure 5 As shown, the frame box further includes a driving assembly 130. The driving assembly 130 may be a hydraulic cylinder. The driving assembly 130 is connected to the fixed corner column 111 and the movable corner column 112 to drive the movable corner column 112 to move between the first position and the second position in the vertical direction. Thus, it is convenient to drive the movable corner column 112 to move between the first position and the second position. In addition, the staff does not need to climb onto the second frame 160 to operate the movable corner column 112, and the operation of the movable corner column 112 is highly safe.
[0072] It is understandable that in an embodiment not shown, the drive assembly may also be a linear drive component, such as a motor, a combination of a rack and a gear, a cylinder, and the like.
[0073] Optionally, the driving assembly 130 is located inside the fixed corner column 111. Thus, the driving assembly 130 can be protected.
[0074] like Figure 5As shown, the driving assembly 130 is located below the movable corner post 112. The top end of the driving assembly 130 is connected to the movable corner post 112. The lower end of the driving assembly 130 is connected to the fixed corner post 111. The lower end of the driving assembly 130 is located at the upper surface of the first frame 150. The driving assembly 130 is detachably arranged. The fixed corner post 111 has a maintenance notch 113 corresponding to the driving assembly 130. The maintenance notch 113 is located at the driving assembly 130. The maintenance notch 113 is separated from the avoidance hole 115. Therefore, the driving assembly 130 can be replaced through the maintenance notch 113.
[0075] Please continue to refer to Figure 5 The frame box further includes a second operating portion 131. The second operating portion 131 passes through the avoidance hole 115 and extends to the outside of the fixed corner column 111. In this way, the second operating portion 131 can act on the driving assembly 130, thereby driving the driving assembly 130 to work.
[0076] Specifically, the second operating portion 131 is rotatably connected to the driving assembly 130. In this way, the second operating portion 131 moves between the original position and the driving position. When the second operating portion 131 moves from the original position toward the driving position, the driving assembly 130 can be driven to work, thereby causing the movable corner post 112 to move upward from the second position toward the first position.
[0077] like Figure 5 As shown, the frame box further includes a movable reset member 193. The movable reset member 193 is a spring. The movable reset member 193 is connected to the second operating portion 131 and the fixed angle column 111 to apply a force to the second operating portion 131 to move the second operating portion 131 toward the original position. In this way, the second operating portion 131 can automatically return to the original position, which is convenient for operation.
[0078] Furthermore, the driving assembly 130 may be a foot-operated hydraulic cylinder, and the second operating part 131 may be a pedal, thereby facilitating operation.
[0079] In an embodiment not shown, the driving assembly may also be a lever cylinder or an electronically controlled hydraulic cylinder.
[0080] Alternatively, if Figures 5 to 8 As shown, the fixed corner column 111 has a first limiting hole 114. The movable corner column 112 has a second limiting hole 117. Some of the second limiting holes 117 correspond to the first position of the movable corner column 112. The frame box further includes a limiting pin 140. When the movable corner column 112 is located at the first position, the first limiting hole 114 is located at the second limiting hole 117. At this time, the limiting pin 140 is inserted through the first limiting hole 114 and the second limiting hole 117 to fix the movable corner column 112 to the fixed corner column 111. In this way, the movable corner column 112 can be locked in the first position.
[0081] Alternatively, if Figure 8 As shown, there are at least two (for example, two) second limiting holes 117. Thus, the limiting pin 140 is selectively inserted into one of the second limiting holes 117. Thus, the movable corner post 112 can be fixed to two positions of the fixed corner post 111.
[0082] Alternatively, if Figures 5 to 7 As shown, the stop pin 140 is located below the second frame 160. The stop pin 140 is movably connected to the second frame 160 in the horizontal direction. In this way, the stop pin 140 can move between the stop position and the departure position. When the stop pin 140 is located at the stop position, the stop pin 140 is inserted into the first stop hole 114 and the second stop hole 117. At this time, the movable corner post 112 is fixed to the fixed corner post 111. When the stop pin 140 is located at the departure position, the stop pin 140 leaves the second stop hole 117. At this time, the movable corner post 112 can move relative to the fixed corner post 111. In this way, the stop pin 140 can be prevented from being lost.
[0083] Furthermore, if Figure 7 As shown, the limit pin 140 has a limit operating portion 141 extending downward and protruding. Therefore, the limit operating portion 141 can be turned to move the limit pin 140.
[0084] Please continue to refer to Figure 7 The frame box also includes a limit member 142 and a mounting seat 144. The limit member 142 and the mounting seat 144 are both sheet metal parts. A portion of the mounting seat 144 is located below the second frame 160. The mounting seat 144 is fixedly connected (e.g., welded) to the second frame 160. The limit member 142 is located below the second frame 160. The limit member 142 is rotatably connected to the mounting seat 144. The rotation axis of the limit member 142 and the moving direction of the limit pin 140 form an angle (e.g., vertical).
[0085] In this way, the stopper 142 can rotate between the blocking position and the release position. Figure 7 As shown, when the limiting member 142 is located at the blocking position and the limiting pin 140 is located at the limiting position, the limiting member 142 is located at the side of the limiting operating portion 141 along the moving direction of the limiting pin 140 to block the limiting operating portion 141, thereby preventing the limiting pin 140 from leaving the limiting position. In this way, the limiting pin 140 can be prevented from leaving the limiting position.
[0086] When the limiting pin 140 needs to be moved to the leaving position, the limiting member 142 can be rotated to the releasing position. At this time, the limiting member 142 no longer blocks the limiting operating portion 141. The limiting pin 140 can be moved to the leaving position.
[0087] Please continue to refer to Figure 7The frame box further includes a limit reset member 143. The limit reset member 143 is a spring. The limit reset member 143 is connected to the limit member 142 and the mounting seat 144 to apply a force to the limit member 142 to move the limit member 142 toward the blocking position. Thus, the limit member 142 that has left the blocking position can automatically return to the blocking position, which is convenient for operation.
[0088] like Figures 1 to 6 As shown, the second frame 160 is located between the top and bottom ends of the fixed corner column 111. In this way, part of the fixed corner column 111 is located above the second frame 160. The frame box also includes a guardrail 190. The guardrail 190 is located above the second frame 160. The guardrail 190 is connected to the second frame 160 and the part of the fixed corner column 111 located above the second frame 160. In this way, the protection of the upper layer of the frame box can be increased, and the frame box can be used safely.
[0089] Please refer to Figures 1 to 3 , the first frame 150 and the second frame 160 are both provided with a porous steel floor 191. The porous steel floor 191 is used to carry the vehicle. In this way, the vehicle can be tied up through the porous steel floor 191. The frame box also includes a ladder 192. The ladder 192 connects the first frame 150 and the second frame 160. The ladder 192 extends from the first frame 150 to the second frame 160. Therefore, the second frame 160 can be climbed up through the ladder 192.
[0090] like Figures 1 to 6 As shown, a movable top corner piece 120 is provided at the top end of the movable corner post 112. A bottom corner piece 121 is provided at the bottom end of the fixed corner post 111. The frame boxes can be stacked by the movable top corner piece 120 and the bottom corner piece 121. The frame boxes can be hoisted by the movable top corner piece 120.
[0091] A headband 122 for blocking the movable top corner piece 120 is provided at the top end of the fixed corner post 111. The headband 122 is a cast steel part. The headband 122 is fixedly connected (for example, welded) to the top end of the fixed corner post 111. The headband 122 is sleeved on the movable body 116. The projection of the headband 122 on the horizontal plane partially overlaps with the projection of the movable top corner piece 120 on the horizontal plane. In this way, when the movable corner post 112 is in the second position, the movable top corner piece 120 is overlapped to the headband 122. At this time, the headband 122 supports the movable top corner piece 120, thereby blocking the movable corner post 112 from continuing to move away from the first position and moving downward.
[0092] The utility model has been described through the above embodiments, but it should be understood that the above embodiments are only for the purpose of example and description, and are not intended to limit the utility model to the scope of the described embodiments. In addition, it can be understood by those skilled in the art that the utility model is not limited to the above embodiments, and more variations and modifications can be made according to the teachings of the utility model, and these variations and modifications all fall within the scope of protection claimed by the utility model. The protection scope of the utility model is defined by the attached claims and their equivalents.
[0093] Unless otherwise defined, the technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art in the technical field of the present invention. The terms used herein are only for describing specific implementation purposes and are not intended to limit the present invention. Terms such as "component" and the like appearing herein may represent either a single part or a combination of multiple parts. Terms such as "installation" and "setting" and the like appearing herein may represent either a component being directly attached to another component or a component being attached to another component through an intermediate. Features described herein in one embodiment may be applied to another embodiment alone or in combination with other features, unless the feature is not applicable in the other embodiment or otherwise specified.
Claims
1. A frame box, characterized in that: The frame box includes: The first one; a second frame, the second frame being located above the first frame and spaced apart from the first frame; A fixed angle post, the bottom end of which is connected to the first frame, and the fixed angle post is connected to the second frame; A movable corner post is movably connected to the fixed corner post in a vertical direction.
2. The frame box according to claim 1, characterized in that: The movable corner column is passed through the fixed corner column.
3. The frame box according to claim 2, characterized in that: The movable corner post has a first operating portion, and the first operating portion extends outside the fixed corner post.
4. The frame box according to claim 2, characterized in that: The frame box further includes a driving assembly connected to the fixed corner post and the movable corner post to drive the movable corner post to move.
5. The frame box according to claim 4, characterized in that: The drive assembly is located inside the fixed corner column.
6. The frame box according to claim 5, characterized in that: The frame box further includes a second operating portion, which extends outside the fixed corner column to drive the driving assembly to work.
7. The frame box according to claim 4, characterized in that: The driving assembly is detachably arranged, and the fixed corner column has a maintenance notch arranged corresponding to the driving assembly.
8. The frame box according to claim 1, characterized in that: The fixed corner column has a first limiting hole, the movable corner column has a second limiting hole, and the frame box further includes a limiting pin, which is passed through the first limiting hole and the second limiting hole to fix the movable corner column to the fixed corner column.
9. The frame box according to claim 8, characterized in that: The limiting pin has an extending and protruding limiting operating portion.
10. The frame box according to claim 9, characterized in that: The frame box further comprises a limit member, which is rotatably arranged and can be rotated to a blocking position to be located to the side of the limit operating part, thereby blocking the limit operating part and further blocking the limit pin from moving away from the second limit hole.
11. The frame box according to claim 10, characterized in that: The frame box further includes a limit reset component, which is connected to the limit component to apply a force to the limit component to move the limit component toward the blocking position.
12. The frame box according to claim 1, characterized in that: The second bracket is located between the top and bottom ends of the fixed corner column, and / or The top end of the movable corner column is located above the second frame.
13. The frame box according to claim 1, characterized in that: The top end of the movable corner column is provided with a movable top corner piece, the bottom end of the fixed corner column is provided with a bottom corner piece, and the top end of the fixed corner column is provided with a headband piece for blocking the movable top corner piece.
14. The frame box according to claim 13, characterized in that: The movable corner post is movable between a first position and a second position along the vertical direction, the movable corner post at the second position is lower than the movable corner post at the first position, and when the movable corner post is at the second position, a dimension between a top surface of the movable corner post and a bottom surface of the bottom corner piece is less than or equal to 3570 mm.