Pallet box chassis

Abstract

The present invention provides a pallet box chassis, which includes a bottom plate and a bottom beam. The edge of the bottom plate has a protrusion extending downward, the bottom beam is arranged below the bottom plate, and the bottom beam is provided with a notch at a position corresponding to the protrusion; wherein the protrusion is provided with a bending portion at the free end, the bending portion extends through the notch and bends against the side wall of the bottom beam, so that the bottom plate and the bottom beam are fixedly connected to each other. According to the pallet box chassis of the present invention, the problem of deformation of the bottom plate caused by hot-dip galvanizing after the pallet box chassis is assembled is avoided. The bottom plate is made of hot-dip galvanized thin steel plate, which can effectively reduce the dead weight of the pallet box and improve transportation efficiency. The bottom plate is connected to the chassis frame in a hooking manner, which avoids the problem that the zinc layer is damaged and affects the anti-corrosion and the spray repair paint affects the quality of the pallet box. The bottom plate is detachable, which is convenient for maintenance and replacement of the bottom plate during use.

Description

Technical Field

[0001] The present invention generally relates to the technical field of container transportation, and more particularly to a pallet box chassis. Background Art

[0002] Currently, most steel pallet boxes need to be hot-dip galvanized to achieve the purpose of corrosion protection. However, the hot-dip galvanizing process will cause serious deformation of the thin bottom plate on the pallet box chassis.

[0003] In order to solve the deformation problem, there are two common methods:

[0004] (1) The chassis frame of the pallet box is first hot-dip galvanized, and then the bottom plate made of purchased hot-dip galvanized thin steel plate is welded to the hot-dip galvanized chassis frame. This can avoid deformation of the bottom plate, but the welding process will damage the hot-dip zinc layer, and the damaged position needs to be sprayed with repair paint. The repair paint left during the repair process will damage the environment inside the box, and the corrosion resistance of the pallet box will decrease, and the appearance will not be beautiful;

[0005] (2) A thicker steel plate is used to make the bottom plate on the chassis. After the bottom plate is welded to the chassis frame, the chassis is hot-dip galvanized as a whole. A thicker bottom plate can reduce deformation during the hot-dip galvanizing process, but this will waste more materials, increase costs, and increase the weight of the pallet box. While controlling the total weight, the loading weight is reduced accordingly.

[0006] Therefore, it is necessary to provide a pallet box chassis to at least partially solve the above problems. Summary of the invention

[0007] In order to at least partially solve the above problems, the present invention provides a pallet box chassis for a pallet box, comprising:

[0008] a bottom plate, wherein an edge of the bottom plate has a protrusion extending downward; and

[0009] A bottom beam, the bottom beam is arranged below the bottom plate, and the bottom beam is provided with a notch at a position corresponding to the protrusion;

[0010] The protrusion is provided with a bending portion at the free end, and the bending portion extends through the notch and bends against the side wall of the bottom beam, so that the bottom plate and the bottom beam are fixedly connected to each other.

[0011] Optionally, the bottom beam is hot-dip galvanized separately, and the bottom plate is made of hot-dip galvanized steel plate.

[0012] Optionally, there are multiple protrusions, and the multiple protrusions are arranged at a predetermined distance from each other along the edge of the bottom plate.

[0013] Optionally, the edge of the bottom plate has a side wall portion extending downward by a predetermined distance, the protrusion extends downward from the side wall portion, and the width of the side wall portion along the edge direction of the bottom plate is greater than the width of the protrusion along the edge direction of the bottom plate.

[0014] Optionally, it further comprises a side beam for connecting and fixing the end wall or the side wall of the pallet box, the side beam being arranged on the outer side of the bottom beam in parallel with the bottom beam, and the protrusion extending into between the side beam and the bottom beam.

[0015] Optionally, the bottom beam is a square tube.

[0016] Optionally, the cross section of the bottom beam along a direction perpendicular to the length direction is a U-shape with the opening facing downward, and the opening of the U-shape is a notch for the bottom beam to cooperate with the bottom plate.

[0017] Optionally, the cross-section of the bottom beam along a direction perpendicular to the length direction is an S-shape having two U-shapes with opposite opening directions.

[0018] Optionally, the notch is provided on two U-shaped common side walls of the bottom beam, one U-shaped structure of the bottom beam is used to support the bottom plate, and the other U-shaped structure of the bottom beam is used to connect and fix the end wall or side wall of the pallet box.

[0019] According to another aspect of the present invention, there is provided a pallet box comprising any pallet box chassis as described above.

[0020] According to the pallet box chassis of the present invention, the chassis frame composed of the bottom beam is separately hot-dip galvanized, which avoids the problem of bottom plate deformation caused by hot-dip galvanizing after the pallet box chassis is assembled. The bottom plate is made of hot-dip galvanized thin steel plate, which can effectively reduce the dead weight of the pallet box, increase the weight of transportable goods, and improve transportation efficiency. The bottom plate and the chassis frame are connected by hooking instead of welding, which avoids the problem that the zinc layer is damaged and affects the anti-corrosion and the spray repair paint affects the quality and aesthetics of the pallet box. In addition, this connection method is detachable, which is also convenient for maintenance and replacement of the bottom plate during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The following drawings are used as part of the present invention for understanding the present invention. In the drawings:

[0022] Figure 1 A schematic diagram of a base plate according to a preferred embodiment of the present invention;

[0023] Figure 2 for Figure 1 A schematic diagram of the unfolding of the bottom plate shown;

[0024] Figure 3 for Figure 1A partial enlarged view of the middle A part;

[0025] Figure 4 A schematic diagram of a bottom beam according to a preferred embodiment of the present invention;

[0026] Figure 5-6 for Figure 1 The bottom plate shown is Figure 4 Schematic diagram of the installation process of the bottom beam shown;

[0027] Figure 7 A schematic diagram of a bottom beam according to another embodiment of the present invention;

[0028] Figure 8 for Figure 1 The bottom plate shown is Figure 7 The matching diagram of the bottom beam shown;

[0029] Fig. 9 To have Figure 1 The bottom plate shown is Figure 7 A front view of a pallet box chassis with bottom beams shown;

[0030] Fig.10 To have Fig. 9 The back side schematic diagram of the pallet box chassis shown;

[0031] Fig.11 for Fig. 9 A partial enlarged view of part B in the middle;

[0032] Fig.12 for Fig.10 A partial enlarged view of the middle C part;

[0033] Fig.13 A schematic diagram of a bottom beam according to a third embodiment of the present invention; and

[0034] Fig.14 To have Fig.13 Schematic diagram of a pallet box chassis with bottom beam shown. DETAILED DESCRIPTION

[0035] In the following description, a large number of specific details are provided to provide a more thorough understanding of the present invention. However, it is apparent 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 well known in the art are not described.

[0036] In order to solve the problem that the bottom plate of a pallet box chassis is deformed during hot-dip galvanizing and the anti-corrosion performance is deteriorated due to welding, the present invention provides a pallet box chassis.

[0037] like Figure 1 to Figure 3As shown in the figure, the bottom plate 110 of the pallet box chassis shown in the present invention is shown. The bottom plate 110 is mainly used to cover the frame of the pallet box chassis and bear the goods in the pallet box. Therefore, the shape of the bottom plate 110 is roughly a rectangle adapted to the bottom of the pallet box. Side wall portions 111 are provided at the four edges of the bottom plate 110, and the side wall portions 111 extend downward from the edges of the bottom plate 110 by a predetermined distance. At the edge of the side wall portion 111, a protrusion 112 is formed by continuing to extend downward by a predetermined distance, and the end of the protrusion 112 forms a bent portion 113. Figure 3 As shown, when assembling the pallet box chassis, the bending portion 113 is bent by a bending device to form a hook to cooperate with the bottom beam for connection.

[0038] Preferably, a plurality of protrusions 112 are provided on each side wall portion 111 at a predetermined distance from each other along the edge of the bottom plate 110. In this way, each protrusion 112 is small in size, which is convenient for bending using a bending device during assembly. In special cases, the protrusion 112 may also be a whole protrusion along the edge of the bottom plate 110. Such a setting can facilitate the manufacture of the bottom plate 110, but requires a relatively large bending device, and needs to be adopted when other structures of the pallet box chassis do not affect the operation of the bending device.

[0039] The bottom plate 110 is generally made of a hot-dip galvanized thin steel plate. Figure 2 As shown, a whole sheet of hot-dip galvanized thin steel plate can be cut according to a predetermined size, and the side wall portion 111 and the protrusion 112 are reserved. The side wall portion 111 is then bent by a bending device so that the side wall portion 111 extends downward to form the bottom plate 110 before assembly. In this way, the bottom plate 110 is formed in one piece, the process is simple, and it is convenient to make. This method will not damage the hot-dip zinc layer, so that the bottom plate 110 can maintain good anti-corrosion performance. In addition, the use of thin steel plate to make the bottom plate 110 can reduce the weight of the pallet box, thereby improving transportation efficiency and reducing transportation costs. Of course, it can be understood that the side wall portion 111 can also be made separately from the bottom plate 110, and connected to the bottom plate 110 by a connection method that does not damage the zinc layer.

[0040] The bottom beam 120 is disposed below the bottom plate 110 to support the bottom plate 110. Figure 4 FIG. 1 is a bottom beam 120 according to a first preferred embodiment of the present invention. The bottom beam 120 is preferably made of a square tube. A notch 121 is machined on the square tube so that the side of the square tube (such as Figure 4 As shown, the side surface 122 is connected to the inner space of the square tube at the notch 121 so as to cooperate with the bent portion 113 of the bottom plate 110. The notch 121 may correspond to the bent portion 113 one by one, or one or two or more adjacent bent portions 113 may correspond to one notch 121, which is not limited in the present invention.

[0041] When assembling the bottom plate and the bottom beam to form a pallet box chassis, firstly, the four bottom beams are connected in a predetermined arrangement through a connection method such as welding to form a chassis frame of the pallet box chassis, and then the chassis frame is hot-dip galvanized to improve the anti-corrosion performance during subsequent use. Next, the bottom plate made of hot-dip galvanized thin steel plate and the chassis frame treated with hot-dip galvanizing can be assembled to form the pallet box chassis. Figure 5 and Figure 6 As shown, the bottom plate 110 is first placed on the chassis frame, that is, the upper surface of the bottom beam 120, and the side wall portion 111 and the protrusion 112 of the bottom plate 110 are both fitted with the side surface 122 of the bottom beam 120, wherein the protrusion 112 is aligned with the notch 121, and the bent portion 113 extends downward beyond the notch 121. The bent portion 113 of the protrusion 112 is bent toward the notch 121 of the bottom beam 120 through the side and bottom surface of the chassis frame using a bending device, and the bent portion 113 passes through the notch 121 to form a hook, which is hooked on the side surface 122. In this way, each of the bent portions 113 on the four side surfaces of the bottom plate 110 is bent to form a hook passing through the corresponding notch 121, thereby completing the installation of the bottom plate 110. The hook formed by bending the bending portion 113 of the bottom plate 110 is connected to the side surface 122 of the bottom beam 120 in a hooking manner, so that the bottom plate 110 can maintain a high stability and prevent it from moving up and down.

[0042] The bottom plate is provided with side walls in order to increase the contact area between the bottom plate and the side of the bottom beam, so as to improve the stability of the connection between the bottom plate and the bottom beam. It should be understood that the bottom plate may also be provided with no side walls, the protrusions directly extend downward from the edge of the bottom plate and form a bent portion at the end, and the bottom plate contacts the side of the bottom beam only through the protrusions.

[0043] In this way, the chassis frame is hot-dip galvanized separately, avoiding the problem of deformation of the bottom plate caused by hot-dip galvanizing after the pallet box chassis is assembled. The bottom plate is made of hot-dip galvanized thin steel plate, which can effectively reduce the dead weight of the pallet box, increase the weight of transportable goods, and improve transportation efficiency. The bottom plate and the chassis frame are connected in a hooking manner by bending the bent portion into a hook, which can avoid the problem of zinc layer damage caused by welding in the prior art, which affects the corrosion resistance and aesthetics, and this connection method is detachable, which is also convenient for maintenance and replacement of the bottom plate during use.

[0044] remove Figure 4 In addition to the embodiment shown in the figure, the bottom beam shown in the present invention can also have a second embodiment, that is, a steel plate is bent into a bent piece with a U-shaped cross-section, such as Figure 7The bottom beam 220 is shown. In this way, the U-shaped opening of the bottom beam 220 is the notch 221 that matches the bent portion of the bottom plate, and both sides of the U-shape can be used as the sides that match the bottom plate. It should be noted that the bottom beam of the bending part has a through-length notch. The advantage of this bending structure bottom beam is that it is easy to process, but the strength and rigidity are relatively low, and it needs to be selected according to specific circumstances.

[0045] The steps of assembling the bottom beam 220 and the bottom plate 210 of the second embodiment into a pallet box chassis are the same as those of the bottom beam 120 of the first embodiment, and will not be described here for the sake of brevity. After the assembly is completed, the bending portion 213 of the bottom plate 210 and the notch 221 of the bottom beam 220 cooperate as shown in the following figure. Figure 8 shown.

[0046] Preferably, if Fig. 9 and Fig.10 As shown, a side beam 230 is further provided on the outer side of the bottom beam 220 of the pallet box chassis 200 to connect and fix the end wall or side wall of the pallet box. The side beam 230 is arranged in parallel with the adjacent bottom beam 220, and the bottom beam 220 and the side beam 230 together form a chassis frame. The side beam 230 may be in other suitable forms such as square tubes, channel steels or bent parts. Thus, in order to facilitate the installation of the bottom plate 210, an installation gap H needs to be reserved between the bottom beam 220 and the side beam 230 when forming the chassis frame.

[0047] During assembly, first assemble the bottom beam 220 and the side beam 230 into a chassis frame by means such as welding, and reserve an installation gap H between adjacent bottom beams 220 and side beams 230. Then perform hot-dip galvanizing on the chassis frame. After that, install the bottom plate 210. First, place the bottom plate 210 on the upper surface of the bottom beam 220. The side wall 211 and the protrusion 212 of the bottom plate 210 are inserted from the installation gap H and fit with the side wall 222 of the bottom beam 220. The bending equipment bends the bent portion 213 of the protrusion 212 toward the notch 221 of the bottom beam 220 through the side and bottom surface of the chassis frame. The bent portion 213 bypasses the bottom surface of the side surface 222 to form a hook, and is hooked on the side surface 222. The specific matching form is as follows: Figure 11-12 As shown. In this way, each bending portion 213 of the bottom plate 210 is bent, and the installation of the bottom plate 210 is completed. It should be understood that this is only an example, and it is not limited to the pallet box chassis using the bottom beam of the second embodiment to be provided with side beams. When the pallet box chassis is provided with the bottom beam of the first embodiment or other forms, side beams can also be provided. Those skilled in the art can design according to specific circumstances, and the present invention does not limit this.

[0048] like Fig.13The third embodiment of the bottom beam shown in the present invention is shown. The bottom beam 320 is a special-shaped bending part, which is formed by bending a steel plate, and its cross section is roughly two U-shaped parts sharing the same side, wherein the opening directions of the two U-shaped parts are opposite and respectively located on both sides of the shared side, that is, roughly formed into an S shape. The bottom beam 320 includes a bottom beam portion 323 for supporting the bottom plate and a side beam portion 324 for connecting and fixing the end wall or side wall of the pallet box. A notch 321 is provided at the connection between the bottom beam portion 323 and the side beam portion 324, that is, on the shared side of the two U-shaped parts, to cooperate with the bending part of the bottom plate. The side 322 where the bottom beam portion 323 and the side beam portion 324 are connected, that is, the shared side of the two U-shaped parts is the side contacting the side wall portion of the bottom plate. Preferably, a bending edge 325 is also provided at the opening of the non-shared side of the U-shaped part of the bottom beam portion 323, to increase the strength and rigidity of the bottom beam portion 323. It can be understood that the method of increasing the strength and rigidity of the bottom beam by bending the edges can also be applied to other embodiments such as the second embodiment. This bottom beam adopts the form of a special-shaped bending part, and the bottom beam used to support the bottom plate and the side beam used to connect and fix the end wall or side wall of the pallet box are integrally processed and formed, which has a simple process and is convenient to manufacture. It also reduces the welding process when the bottom beam and the side beam are assembled into the chassis frame, which can optimize the assembly process and improve production efficiency.

[0049] The pallet box chassis 300 assembled by the bottom beam of the third embodiment is as follows: Fig.14 As shown, the assembly process is the same as the assembly process of the pallet box chassis using the bottom beam of the first embodiment, which will not be described here. Preferably, the pallet box chassis 300 is also provided with a lower frame 340 to increase the strength of the pallet box chassis 300 and facilitate the handling of the pallet box chassis 300.

[0050] According to another aspect of the present invention, there is further provided a pallet box having any of the pallet box chassis described above.

[0051] According to the pallet box chassis of the present invention, the chassis frame composed of the bottom beam is separately hot-dip galvanized, which avoids the problem of bottom plate deformation caused by hot-dip galvanizing after the pallet box chassis is assembled. The bottom plate is made of hot-dip galvanized thin steel plate, which can effectively reduce the dead weight of the pallet box, increase the weight of transportable goods, and improve transportation efficiency. The bottom plate and the chassis frame are connected by hooking instead of welding, which avoids the problem that the zinc layer is damaged and affects the anti-corrosion and the spray repair paint affects the quality and aesthetics of the pallet box. In addition, this connection method is detachable, which is also convenient for maintenance and replacement of the bottom plate during use.

[0052] The present invention has been described by the above embodiments, but it should be understood that the above embodiments are only for the purpose of example and illustration, and are not intended to limit the present invention to the described embodiments. It can be understood by those skilled in the art that more variations and modifications can be made according to the teachings of the present invention, and these variations and modifications all fall within the scope of the protection claimed by the present invention. The protection scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. A pallet box chassis, used for a pallet box, characterized in that: include: A bottom plate, wherein the edge of the bottom plate has a protrusion extending downward, the protrusion is multiple, and the multiple protrusions are arranged along the edge of the bottom plate at a predetermined distance from each other, and the bottom plate is made of a hot-dip galvanized thin steel plate; as well as A bottom beam, the bottom beam is arranged below the bottom plate, the bottom beam is provided with a notch at a position corresponding to the protrusion, the cross section of the bottom beam along a direction perpendicular to the length is an S-shape having two U-shapes with opening directions opposite to each other, the notch is arranged on a common side wall of the two U-shapes of the bottom beam, one U-shaped structure of the bottom beam is used to support the bottom plate, and the other U-shaped structure of the bottom beam is used to connect and fix the end wall or side wall of the pallet box; The protrusion is provided with a bent portion at the free end, the bent portion extends through the notch and bends against the side wall of the bottom beam to form a hook, which is hooked on the side wall of the bottom beam, and the bottom plate is connected to the side wall of the bottom beam by a hook formed by bending the bent portion, so that the bottom plate and the bottom beam are fixedly connected to each other. The notches correspond to the bent portions one by one.

2. The pallet box chassis according to claim 1, characterized in that: The bottom beam is hot-dip galvanized separately.

3. The pallet box chassis according to claim 1, characterized in that: The edge of the bottom plate has a side wall portion extending downward by a predetermined distance, the protrusion portion extends downward from the side wall portion, and the width of the side wall portion along the edge direction of the bottom plate is greater than the width of the protrusion portion along the edge direction of the bottom plate.

4. A pallet box, characterized in that: Comprising the pallet box chassis according to any one of claims 1 to 3.

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