Double-layer transport case

Abstract

The utility model discloses a double-layer transport case which comprises a transport frame, and the transport frame comprises a bottom frame, at least one pair of guide rails, at least one pair of stand columns and an upper-layer bracket. The guide rails are fixed to the bottom frame, each pair of guide rails is arranged on the two sides of the upper portion of the bottom frame in the width direction of the bottom frame, and each pair of guide rails is arranged in parallel and inclines upwards. The stand columns are close to the lower ends of the guide rails, fixed to the bottom frame and extend in the height direction of the bottom frame. The upper layer bracket includes a first end portion and a second end portion in a length direction of the upper layer bracket. Wherein the first end part can move along the guide rail and can be separated from the guide rail from the lower end of the guide rail, and the stand column is used for supporting the second end part. According to the double-layer transport case disclosed by the utility model, the automobile and the upper-layer tray are fixed outside the case and then integrally loaded into the case, so that the double-layer transport case is more convenient, time-saving and labor-saving. And the brackets of a plurality of transport boxes can be placed in one box in a centralized manner during returning, so that the utilization rate of the transport boxes during returning is improved.

Description

Technical Field

[0001] This utility model relates to the field of transportation equipment technology, specifically to a double-layer transport box. Background Technology

[0002] Some existing car transport boxes are divided into upper and lower transport spaces, with both the upper and lower trays used to carry cars. However, loading cars requires a lot of manpower and takes a long time. Furthermore, during the return trip, the upper tray obstructs the space utilization of the transport box, resulting in low efficiency.

[0003] Therefore, a double-layer transport container is needed to at least partially solve the above problems. Utility Model Content

[0004] The utility model description section introduces a series of simplified concepts, which will be further explained in detail in the detailed description section. This utility model description section is not intended to limit the key features and essential technical features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.

[0005] To at least partially solve the above problems, this utility model provides a double-layer transport box, the double-layer transport box including a transport frame, the transport frame including:

[0006] Base frame;

[0007] At least one pair of guide rails are fixed to the base frame. Each pair of guide rails is respectively disposed on both sides above the base frame along the width direction of the base frame. Each pair of guide rails is arranged in parallel and inclined upward.

[0008] At least one pair of uprights are provided, the uprights are correspondingly arranged with the guide rail, the uprights are close to the lower end of the guide rail, the uprights are fixed to the base frame and extend along the height direction of the base frame;

[0009] The upper bracket includes a first end and a second end along its length.

[0010] The first end can move along the guide rail and can detach from the lower end of the guide rail, and the column is used to support the second end.

[0011] According to this utility model, the double-layer transport container allows for securing the vehicle to the upper pallet outside the container before loading it into the container as a whole. This is more convenient, saving time and effort compared to loading the vehicle into the container first and then securing it to the upper pallet inside. Since the upper pallet can be removed from the container, multiple transport container pallets can be grouped together in one container during the return trip, allowing the other containers to be used as ordinary cargo containers, thus improving the utilization rate of the transport containers during the return trip.

[0012] Optionally, the guide rail further includes a limiting pin, and the guide rail is provided with a bracket limiting hole, the limiting pin being able to be inserted into the bracket limiting hole to limit the first end.

[0013] Optionally, the guide rail is configured as a groove, and rollers are respectively provided on both sides of the first end of the upper bracket, and the rollers roll within the groove.

[0014] Optionally, the openings of the grooves of the pair of guide rails are arranged facing each other, and the rollers extend outward from the side of the first end along the width direction of the upper bracket.

[0015] Optionally, the roller is connected to the main body of the upper bracket via a telescopic sleeve, and the telescopic sleeve is provided with a pin hole.

[0016] Optionally, the second end includes a locking seat, the position of which is adjustable along the length of the upper bracket, and the locking seat extends outward from the side of the second end along the width of the upper bracket.

[0017] The column includes a stop bar that extends outward from the column perpendicular to the height direction and is used to support the locking seat.

[0018] Optionally, the column further includes a sliding block, which is fixedly connected to the stop bar. The sliding block can move up and down along the column and is fixed to the column by a fixing pin.

[0019] Optionally, the locking seat includes a top plate and side plates, the side plates extending downward from the top plate, and the top plate and the two side plates forming a downward-opening groove.

[0020] Optionally, the locking seat further includes an anti-detachment pin, which, in the installed state of the upper bracket, passes through the two side plates below the stop bar to prevent the stop bar from dislodging from the opening of the locking seat.

[0021] Optionally, the side of the second end is provided with locking seat limiting holes at intervals along the length direction of the upper bracket, and locking pins are inserted into the locking seat limiting holes on both sides of the top plate adjacent to the top plate.

[0022] Optionally, the transport frame includes a top side beam extending along the length of the base frame, and the upper end of the upright is connected to the top side beam; and / or

[0023] The end face of the first end of the upper bracket is also provided with an anti-collision device.

[0024] Optionally, the transport frame includes guide rail supports arranged along the height direction to support the guide rails, and the lower part of the guide rail supports is fixed to the base frame; and / or

[0025] The guide rail includes a horizontal extension, which is smoothly connected to the lower end of the inclined portion of the guide rail. The horizontal extension is fixedly connected to the base frame, and the lower part of the column is fixed to the horizontal extension.

[0026] According to the present invention, the double-layer transport box can be tilted to prevent the box cover from being too high, thus realizing multimodal transport. The tilt angle can be adjusted to adapt to different types of transport vehicles. Attached Figure Description

[0027] The following drawings, which are incorporated herein by reference as part of this invention, are provided for understanding the invention. The drawings illustrate embodiments of the invention and their descriptions, serving to explain the principles of the invention.

[0028] Figure 1 This is a schematic diagram of the transport frame of a double-layer transport box according to a specific embodiment of the present utility model, wherein some components are omitted for ease of illustration;

[0029] Figure 2 This is a side view of a double-layer transport box according to a specific embodiment of the present utility model, wherein some components are omitted for ease of illustration;

[0030] Figure 3 This is a schematic diagram of the side, end, and bottom of a double-layer transport box according to a specific embodiment of the present utility model;

[0031] Figure 4 This is a schematic diagram of the upper support of a double-layer transport box according to a specific embodiment of the present utility model;

[0032] Figure 5 for Figure 4 A top view of the upper bracket shown;

[0033] Figure 6 for Figure 4 The rear view of the upper bracket shown;

[0034] Figure 7 for Figure 4 A schematic diagram of the rollers and telescopic sleeve of the upper bracket shown;

[0035] Figure 8 for Figure 1 A partial schematic diagram of region A in the middle;

[0036] Figure 9 for Figure 1 A partial schematic diagram of region A from another perspective;

[0037] Figure 10 for Figure 3 A partial schematic diagram of region B in the middle;

[0038] Figure 11 for Figure 1 A partial schematic diagram of region C from another perspective; and

[0039] Figure 12 for Figure 4 A partial schematic diagram of region D in the middle.

[0040] Explanation of reference numerals in the attached figures:

[0041] 10: Base frame

[0042] 20: Upper bracket

[0043] 21: First end

[0044] 211: Roller

[0045] 212: Telescopic Sleeve

[0046] 212a: Pin hole

[0047] 213: Collision avoidance device

[0048] 22: Second end

[0049] 221: Locking Seat

[0050] 221a: Top plate

[0051] 221b: Side panel

[0052] 221c: Anti-pinning

[0053] 222: Locking seat limit hole

[0054] 223: Locking pin

[0055] 30: Guide rail

[0056] 31: Limit pin

[0057] 32: Bracket limiting hole

[0058] 30a: Horizontal extension

[0059] 40: Column

[0060] 41: Bar

[0061] 42: Sliding block

[0062] 43: Fixed pin

[0063] 50: Top and side beams

[0064] 60: Guide rail support

[0065] 100: Transport rack

[0066] 200: Double-layer transport container

[0067] D1: Length direction of the base frame

[0068] D2: Width direction of the base frame

[0069] D3: Height direction of the base frame

[0070] X: Length direction of the upper bracket

[0071] Y: Width direction of the upper bracket Detailed Implementation

[0072] In the following description, numerous specific details are provided to provide a more thorough understanding of the present invention. However, it will be apparent to those skilled in the art that the present invention can be practiced without one or more of these details. In other instances, certain technical features known in the art are not described to avoid confusion with the present invention.

[0073] To fully understand this invention, a detailed description will be set forth in the following description. It should be understood that these embodiments are provided so that the disclosure of this invention is thorough and complete, and that the concept of these exemplary embodiments is fully conveyed to those skilled in the art. Obviously, the implementation of embodiments of this invention is not limited to the specific details familiar to those skilled in the art. Preferred embodiments of this invention are described in detail below; however, other embodiments may be implemented in addition to these detailed descriptions.

[0074] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to the present invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of the stated features, integrals, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or combinations thereof.

[0075] 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, etc. Moreover, for example, the term "first component" itself does not imply the existence of a "second component", and the term "second component" itself does not imply the existence of a "first component".

[0076] It should be noted that the terms “up,” “down,” “front,” “back,” “left,” “right,” “inner,” “outer,” and similar expressions used in this article are for illustrative purposes only and are not intended to be restrictive.

[0077] This utility model provides a double-layer transport box that can be used to transport goods such as automobiles, but is not limited to transporting automobiles; it can also be used to transport ordinary goods.

[0078] Now, refer to the appendix Figure 1 To be continued Figure 12 Exemplary embodiments according to the present invention will be described in more detail below.

[0079] This utility model provides a double-layer transport box 200 (hereinafter also referred to as transport box 200), such as Figures 1 to 3 As shown, the double-layer transport box 200 includes a transport frame 100, which includes a base frame 10, an upper bracket 20, at least one pair of guide rails 30, and at least one pair of uprights 40. The guide rails 30 are fixed to the base frame 10. Each pair of guide rails 30 is respectively located on both sides of the base frame 10 along the width direction D2 of the base frame 10, and each pair of guide rails 30 is parallel and inclined upwards. The guide rails 30 are inclined upwards from the base frame 10 along the length direction D1, and the positions of each pair of guide rails 30 along the length direction D1 of the base frame 10 are approximately the same. The uprights 40 are correspondingly arranged with the guide rails 30, close to the lower end of the guide rails 30, and are fixed to the base frame 10 and extend along the height direction D3 of the base frame 10. That is, each guide rail 30 has a corresponding upright 40 at its lower end, and a pair of guide rails 30 and a corresponding pair of uprights 40 together support one upper bracket 20. The upper bracket 20 includes a first end 21 and a second end 22 along its length direction D1. The first end 21 and the second end 22 are respectively the two ends of the upper bracket 20 along its length direction X, where each end is a portion extending from the middle towards the end along the length direction D1. The first end 21 is movable along the guide rail 30 and can disengage from the lower end of the guide rail 30. A column 40 supports the second end 22, fixing it to a certain height.

[0080] Understandably, the upper bracket 20 is located above the base frame 10 and is supported by the guide rail 30 and the upright column 40. The guide rail 30 is open at least at its lower end, allowing the upper bracket 20 to detach from it, meaning it can be moved outside the container. This allows the vehicle to be secured to the upper bracket 20 from outside the container, eliminating the need for personnel to enter, making the process more convenient, time-saving, and labor-saving. When loading the upper bracket 20 with the vehicle secured into the container, it is inserted from the lower end of the guide rail 30 via the first end 21 and moved upwards along the guide rail 30. Then, the second end 22 is raised to a certain height and secured to the upright column 40.

[0081] In the installed state of the upper bracket 20, the width direction Y of the upper bracket 20 is approximately the same as the width direction D2 of the base frame 10. In the installed state of the upper bracket 20, and when the upper bracket 20 is horizontal, the length direction X of the upper bracket 20 is approximately the same as the length direction D1 of the base frame 10. In the installed state of the upper bracket 20, the upper bracket 20 can be in an inclined state where its length direction X forms an angle with the horizontal plane, that is, the length direction X of the upper bracket 20 can form an angle with the length direction D1 of the base frame 10.

[0082] It should be noted that the transport rack 100 may be equipped with a pair of guide rails 30, a corresponding pair of uprights 40, and an upper bracket 20, or it may be equipped with multiple pairs of guide rails 30, corresponding uprights 40, and upper brackets 20. Each upper bracket 20 may be used to secure one car or more than one car.

[0083] For example, the transport frame 100 is equipped with two pairs of guide rails 30, two pairs of corresponding uprights 40, and two upper brackets 20, each upper bracket 20 carrying one car. The two pairs of guide rails 30 are arranged along the length D1 of the base frame 10. The two pairs of guide rails 30 can be arranged parallel in their extension direction, i.e., the lower end of the first pair of guide rails 30 is close to the upper end of the second pair of guide rails 30. In this case, the upper brackets 20 of the first pair of guide rails 30 can be installed first using a forklift or similar equipment, followed by the upper brackets 20 of the second pair of guide rails 30. When the double-layer transport box 200 has doors at both ends, the two pairs of guide rails 30 can also be arranged back-to-back, i.e., the lower ends of the two pairs of guide rails 30 are close to the two ends of the double-layer transport box 200, and the upper ends of the first pair of guide rails 30 are close to the upper ends of the second pair of guide rails 30. In this case, two upper brackets 20 can be installed from each of the two end doors.

[0084] The double-layer transport box 200 may also include an end door, a side plate 221b disposed on the side of the transport frame 100, and a top plate 221a disposed on the top of the transport frame 100.

[0085] To enable the first end portion 21 to move along the guide rail 30, in some specific embodiments, the first end portion 21 is configured to roll along the guide rail 30. For example... Figure 8 and Figure 9As shown, the guide rail 30 is configured as a groove, and rollers 211 are respectively provided on both sides of the first end 21 of the upper bracket 20. The rollers 211 roll within the groove. The openings of the grooves of the pair of guide rails 30 are arranged facing each other, and the openings are along the extension direction of the guide rails 30 and towards the upper bracket 20. The rollers 211 extend outward from the side of the first end 21 along the width direction Y of the upper bracket 20, and the side faces the guide rail 30. That is, the distance between the two rollers 211 is greater than the dimension of the other part of the upper bracket 20 in the width direction Y of the upper bracket 20, and the main body of the upper bracket 20 is located between the two guide rails 30. The rolling of the two rollers 211 within the grooves of the guide rails 30 drives the first end 21 to move along the guide rail 30. Preferably, the dimension of the groove opening perpendicular to the extension direction of the guide rail 30 is smaller than the outer diameter of the roller 211, thereby preventing the rollers 211 from coming out of the groove opening.

[0086] Furthermore, the roller 211 is connected to the main body of the upper bracket 20 via a telescopic sleeve 212. For example... Figure 7 As shown, the telescopic sleeve 212 includes an inner sleeve and an outer sleeve. The outer sleeve has a hollow structure, and the inner sleeve can move axially within the outer sleeve. One of the inner and outer sleeves is fixedly connected to the main body of the upper bracket 20, and the other is fixedly connected to the bearing of the roller 211. The telescopic sleeve 212 is provided with several pin holes 212a. For example, the outer sleeve is provided with one pin hole 212a, and the inner sleeve is provided with multiple pin holes 212a spaced apart along its axial direction. By passing pins through the pin holes 212a of the inner and outer sleeves, the distance between the roller 211 and the main body of the upper bracket 20 can be adjusted and fixed, thereby adapting the width of the upper bracket 20 to the spacing of the pair of guide rails 30.

[0087] To define the position (height) of the first end 21 on the guide rail 30, such as Figure 8 and Figure 9 As shown, the guide rail 30 also includes a limiting pin 31, and the guide rail 30 is provided with a bracket limiting hole 32, into which the limiting pin 31 can be inserted. Along the extending direction of the guide rail 30, the limiting hole is located below the roller 211 to prevent the roller 211 from rolling downwards. To prevent damage to the roller 211, a pad can be provided between the limiting pin 31 and the roller 211.

[0088] In other specific embodiments, the opening of the groove in the guide rail 30 can face other directions, such as upward, downward, or outward, and the rollers 211 of the upper bracket 20 can be set accordingly, without limitation. Of course, the first end 21 can also be configured to slide along the guide rail 30.

[0089] like Figures 10 to 12As shown, to support the second end 22, the second end 22 includes a locking seat 221, which extends outward from the side of the second end 22 along the width direction Y of the upper bracket 20; the column 40 includes a stop bar 41, which extends outward from the column 40 perpendicular to the height direction D3, thereby supporting the locking seat 221 and fixing the height of the second end 22. Specifically, the column 40 also includes a sliding block 42 (e.g., Figure 10 As shown, the column 40 has a plurality of spaced pin holes 212a along the height direction D3. The sliding block 42 can move up and down along the column 40 and is fixed by a fixing pin 43. The sliding block 42 is fixedly connected to the stop rod 41, so that the height of the second end 22 can be adjusted. For example, the column 40 is configured as a hollow structure with an opening extending along the height direction D3. The sliding block 42 is located in the cavity of the column 40, and the stop rod 41 extends out of the opening. For example, the locking seat 221 includes a top plate 221a and a side plate 221b. The side plate 221b extends downward from the top plate 221a, and the top plate 221a and the two side plates 221b form a downward-opening groove. The side plate 221b has a limiting function to prevent the stop rod 41 from disengaging in the length direction X of the upper bracket 20.

[0090] Furthermore, to prevent the stop lever 41 from disengaging from below the locking seat 221, the locking seat 221 also includes an anti-disengagement pin 221c. In the installed state of the upper bracket 20, the anti-disengagement pin 221c passes through the two side plates 221b below the stop lever 41, which can prevent the stop lever 41 from disengaging from the lower opening of the locking seat 221.

[0091] When installing the upper bracket 20, the sliding block 42 is located at the lower part of the column 40 near the base frame 10, the locking seat 221 is located above the sliding block 42, and the anti-detachment pin 221c is not inserted. After the second end 22 is raised to the predetermined height, the sliding block 42 moves up and is fixed to the column 40 to support the locking seat 221, and then the anti-detachment pin 221c is inserted.

[0092] To accommodate different vehicle models, the upper bracket 20 is designed with an adjustable tilt. The guide rail 30 has multiple spaced bracket limiting holes 32 along its extension direction. Limiting pins 31 can be inserted into these holes 32 to limit the first end 21, allowing the first end 21 to be adjusted to different positions along the guide rail 30. Correspondingly, the position of the locking seat 221 is adjustable along the length X of the upper bracket 20; that is, the distance between the locking seat 221 and the roller 211 on the upper bracket 20 is adjustable.

[0093] Specifically, the locking seat 221 is movably connected to the side of the second end 22. The side of the second end 22 has multiple locking seat limiting holes 222 spaced apart along the length X of the upper bracket 20. Locking pins 223 are inserted into the locking seat limiting holes 222 on both sides of the top plate 221a (along both sides of the length X of the upper bracket 20) to fix the position of the locking seat 221 on the upper bracket 20. Therefore, the position of the locking seat 221 in the length X of the upper bracket 20 is adjustable, i.e., the distance between the locking seat 221 and the roller 211 can be adjusted. Figure 12 As shown, the side of the second end 22 is configured as a hollow structure and has an opening extending along the length direction X of the upper bracket 20. The locking seat 221 includes a connecting part located within the hollow structure of the side of the second end 22, and the top plate 221a is connected to the connecting part through the opening. The connecting part can move along the length direction X of the upper bracket 20 without disengaging from the opening.

[0094] In some preferred embodiments, such as Figures 1 to 3 As shown, the transport frame 100 also includes top side beams 50, which are located at the top of the transport frame 100 and extend along the length direction D1 of the base frame 10. Two top side beams 50 are located on either side of the transport frame 100 along the width direction D2 of the base frame 10. The upper end of the upright 40 is connected to the top side beams 50, making the upright 40 more stable. Simultaneously, the guide rail 30 can be configured to extend to near or contact the top of the transport box 200, allowing the upper bracket 20 to be moved to the top and fixed. Thus, the transport box 200 can also be used as a transport box for ordinary goods, improving the space utilization rate of the transport box 200 during its return trip.

[0095] To support the guide rail 30, the transport frame 100 includes a guide rail support column 60, which is arranged along the height direction D3, and the lower part of the guide rail support column 60 is fixed to the base frame 10. Alternatively, the lower part of the guide rail support column 60 is fixed to the base frame 10 via the lower part of the guide rail 30. For example, the guide rail 30 includes a horizontal extension 30a, which is smoothly connected to the lower end of the inclined portion of the guide rail 30, and the horizontal extension 30a is fixedly connected to the base frame 10. The lower part of the upright column 40 is fixed to the horizontal extension 30a.

[0096] Preferably, each guide rail 30 is supported by a plurality of guide rail supports 60 spaced apart along the length direction D1 of the base frame 10. The guide rail supports 60 also serve to strengthen the structural strength of the sides of the transport frame 100.

[0097] The end face of the first end 21 of the upper bracket 20 is also provided with an anti-collision device 213, such as a resilient pad or an outwardly protruding, arc-shaped device. Figure 4 , Figure 5 and Figure 8As shown, the anti-collision device 213 is set as a rotating wheel, which can reduce the risk of the upper bracket 20 impacting and damaging the box.

[0098] Unless otherwise defined, the technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used herein is for descriptive purposes only and is not intended to limit the scope of the invention. Features described in one embodiment may be applied, alone or in combination with other features, to another embodiment, unless that feature is not applicable in that other embodiment or is otherwise stated.

[0099] This utility model has been described through the above embodiments. However, it should be understood that the above embodiments are only for illustrative purposes. This utility model is not limited to the above embodiments. Many variations and modifications can be made based on the teachings of this utility model, and all such variations and modifications fall within the scope of protection claimed by this utility model.

Claims

1. A double-layer transport box, characterized in that, The double-layer transport container includes a transport frame, which comprises: Base frame; At least one pair of guide rails are fixed to the base frame. Each pair of guide rails is respectively disposed on both sides above the base frame along the width direction of the base frame. Each pair of guide rails is arranged in parallel and inclined upward. At least one pair of uprights are provided, the uprights are correspondingly arranged with the guide rail, the uprights are close to the lower end of the guide rail, the uprights are fixed to the base frame and extend along the height direction of the base frame; The upper bracket includes a first end and a second end along its length. The first end can move along the guide rail and can detach from the lower end of the guide rail, and the column is used to support the second end.

2. The double-layer transport box according to claim 1, characterized in that, The guide rail also includes a limiting pin, and the guide rail is provided with a bracket limiting hole. The limiting pin can be inserted into the bracket limiting hole to limit the first end.

3. The double-layer transport box according to claim 1, characterized in that, The guide rail is configured as a groove, and rollers are respectively provided on both sides of the first end of the upper bracket, and the rollers roll in the groove.

4. The double-layer transport box according to claim 3, characterized in that, The openings of the grooves of the pair of guide rails are arranged facing each other, and the rollers extend outward from the side of the first end along the width direction of the upper bracket.

5. The double-layer transport box according to claim 3, characterized in that, The roller is connected to the main body of the upper bracket via a telescopic sleeve, which is provided with a pin hole.

6. The double-layer transport box according to claim 1, characterized in that, The second end includes a locking seat, the position of which is adjustable along the length of the upper bracket, and the locking seat extends outward from the side of the second end along the width of the upper bracket. The column includes a stop bar that extends outward from the column perpendicular to the height direction and is used to support the locking seat.

7. The double-layer transport box according to claim 6, characterized in that, The column also includes a sliding block, which is fixedly connected to the stop bar. The sliding block can move up and down along the column and is fixed to the column by a fixing pin.

8. The double-layer transport box according to claim 6, characterized in that, The locking seat includes a top plate and side plates, the side plates extending downward from the top plate, and the top plate and the two side plates forming a downward-opening groove.

9. The double-layer transport box according to claim 8, characterized in that, The locking seat also includes an anti-detachment pin, which, in the installed state of the upper bracket, passes through the two side plates below the stop bar to prevent the stop bar from detaching from the opening of the locking seat.

10. The double-layer transport box according to claim 8, characterized in that, The second end has locking seat limiting holes spaced apart along the length of the upper bracket, and locking pins are inserted into the locking seat limiting holes on both sides of the top plate adjacent to the top plate.

11. The double-layer transport box according to claim 1, characterized in that, The transport frame includes a top side beam extending along the length of the base frame, and the upper end of the upright is connected to the top side beam; and / or The end face of the first end of the upper bracket is also provided with an anti-collision device.

12. The double-layer transport box according to claim 1, characterized in that, The transport frame includes guide rail supports, which are arranged along the height direction to support the guide rails. The lower part of the guide rail supports is fixed to the base frame; and / or The guide rail includes a horizontal extension, which is smoothly connected to the lower end of the inclined portion of the guide rail. The horizontal extension is fixedly connected to the base frame, and the lower part of the column is fixed to the horizontal extension.

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