CN113493048A

CN113493048A - Tray box

Info

Publication number: CN113493048A
Application number: CN202110777101.XA
Authority: CN
Inventors: 高惠锦
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-07-09
Filing date: 2021-07-09
Publication date: 2021-10-12

Abstract

The invention discloses a tray box. The tray box includes a bottom tray, two side walls and two end walls. The four corners on tray case chassis are provided with the chassis stand, and the chassis stand includes the first surface towards the lateral wall and the second surface towards the end wall under the assemblage state of tray case. A chassis stacking boss is arranged at the top of the chassis upright post; the first surface is provided with a first elongated slot, the second surface is provided with a second elongated slot and a limiting lug, and the second elongated slot is provided with a side opening communicated with the outside of the box in the direction opposite to the first surface. And side wall hinged shafts extending into the first long grooves are arranged on two sides of the bottom of the side wall, and side wall limiting holes for accommodating the chassis stacking bosses are arranged at the bottom ends of the side wall stand columns. End wall hinged shafts used for extending into the second long grooves are arranged on two sides of the bottom of the end wall, and end wall limiting notches used for containing limiting convex blocks are arranged on the end wall upright posts. According to the pallet box disclosed by the invention, the side walls are prevented from toppling safely and reliably in an assembled state, and the end walls are detachable.

Description

Tray box

Technical Field

The invention relates to the field of containers, in particular to a tray box.

Background

To reduce logistics packaging costs, current tray boxes are often designed to be collapsible. Such foldable tray boxes generally consist of a base, two end walls oppositely disposed on the base, and two side walls oppositely disposed on the base. When folding tray case, two end walls of turning over earlier, two lateral walls should be able to keep the assemblage state this moment to the emergence is emptyd to the incasement and is pounded the end wall of breaking over earlier, or causes the injury to operating personnel. When the tray box is assembled, the two side walls are assembled firstly, at the moment, the two side walls also need to be capable of stably keeping the assembled state, so that the end walls can be continuously assembled by operating personnel, and the tray box can be folded and assembled by one person.

In order to solve the technical problem, two solutions are mainly provided at present, the first is to erect the side walls to incline the side walls outside the box, and the second is to insert the side walls on the chassis. The first mode is that the side wall can be directly laid down when folded, and the operation is convenient, but if the operation is carried out in outdoor strong wind, the side wall has the risk of being blown down by wind; the second mode is safe and reliable in rigid combination of the side wall and the chassis, but the side wall needs to be lifted to separate the side wall and the chassis from sleeve insertion and then folded during folding operation, so that the operation is troublesome.

The tray box generally requires that the end walls and the side walls are connected with the chassis in the vertical direction in an assembled state so as to ensure that the end walls and the side walls are not separated from the chassis in use of the tray box, at least one pair of end walls or one pair of side walls are connected with the chassis in the vertical direction, and the end walls or the side walls which are not connected with the chassis in the vertical direction can be indirectly connected with the chassis in the vertical direction through the connecting lock of the end walls and the side walls. Above-mentioned mode that the lateral wall that inclines outward the case stood can realize simultaneously when the lateral wall assemblage being connected with the chassis in vertical direction when the lateral wall assemblage, and the second kind is inserted the lateral wall cover mode on the chassis, because folding operation need lift up the lateral wall during the time of need fold again, can not realize lateral wall and chassis in vertical direction's being connected during so lateral wall assemblage, consequently just need end wall and chassis to be connected in vertical direction.

The end walls and the chassis are connected in the vertical direction in two modes, the first mode is that the lower beams of the end walls and the edge beams of the chassis are hinged together in a mode of penetrating shafts through hinges or round pipes, the advantages are high connection strength, and the defects are that the heights of hinged shafts of the two end walls need to be one higher and one lower, the end walls are folded and divided in sequence, and the end walls are difficult to install and disassemble. The second is that set up the articulated shaft at end wall underbeam both ends, set up on the chassis stand with articulated shaft complex slot hole, set up matched with connecting pin on the end wall stand and on the chassis stand respectively, connecting hole or connection lug, the spread groove, connecting pin when end wall assemblage, connecting hole or connection lug, the spread groove cooperatees and makes end wall and chassis be connected in vertical direction, the connecting pin when the end wall is folding, connecting hole or connection lug, the spread groove separation, the articulated shaft is portable in the slot hole, make the end wall fold not divide the order, can realize making things convenient for the end wall to dismantle in order to do benefit to end wall production equipment through the setting of articulated shaft or slot hole form, the maintenance, change.

According to the requirements of safe and reliable anti-toppling of the side wall and detachable end wall of a client, the prior art cannot meet the requirements or has a complex structure and high cost at the same time. Therefore, there is a need to design a new structure of tray box to at least partially solve the above problems.

Disclosure of Invention

In this summary, concepts in a simplified form are introduced that are further described in the detailed description. This summary of the invention is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used as an aid in determining the scope of the claimed subject matter.

The invention provides a pallet box, which comprises a rectangular chassis, two end walls arranged oppositely on the chassis and two side walls arranged oppositely on the chassis, wherein the side walls comprise side wall upright posts, the end walls comprise end wall upright posts,

the four corners on chassis are provided with the chassis stand, the chassis stand include in the assemblage state of tray case down towards the first surface of lateral wall and towards the second surface of end wall, the chassis stand includes:

the chassis stacking boss is arranged at the top of the chassis upright post;

a first elongated slot disposed on the first surface;

the second long grooves are arranged on the second surface, and at least one second long groove is provided with a side opening communicated with the outside of the tank in the direction opposite to the first surface; and

the limiting lug is arranged on the second surface and is positioned above the side opening;

the side wall includes:

side wall hinge shafts which are respectively arranged at two sides of the bottom of the side wall facing the first surface in the assembled state and extend away from the side wall along the direction vertical to the side wall upright; and

the side wall limiting hole is formed in the bottom end of the side wall upright post and is positioned above the side wall hinge shaft;

the end wall includes:

end wall hinge shafts respectively provided on both sides of a bottom of the end wall facing the second surface in the assembled state and extending from the end wall in a direction perpendicular to the end wall pillar away from the end wall; and

the end wall limiting notch is arranged on the end wall upright post and is positioned above the end wall hinge shaft;

the side wall hinge shaft is used for entering the first long groove to enable the side wall to be hinged with the base plate, the end wall hinge shaft is used for entering the second long groove to enable the end wall to be hinged with the base plate, after the side wall is assembled, the base plate stacking lug boss is at least partially located in the side wall limiting hole to enable the side wall to be kept upright, and after the end wall is assembled, the limiting lug boss is at least partially located in the end wall limiting notch to limit the upward movement of the end wall.

According to the tray box, the side walls can be stably arranged in an assembled state, the anti-toppling safety and reliability are realized, and the end walls can be detached.

Optionally, the inner side of the base plate stacking boss has a first guiding inclined surface, and the upper end of the limiting lug has a second guiding inclined surface, so that during the assembling process of the side wall, the second guiding inclined surface and the first guiding inclined surface sequentially guide the side wall limiting hole, so that the base plate stacking boss at least partially enters the side wall limiting hole.

Optionally, the outer side wall of the side wall limiting hole is provided with a stacking part notch, the stacking part notch is opened upwards from the bottom of the outer side wall of the side wall limiting hole, and the width of the stacking part notch is greater than that of the chassis stacking boss.

Optionally, the outer sidewall of the sidewall limiting hole has a third guiding slope, and/or the outer sidewall of the sidewall limiting hole has a fourth guiding slope, so that during the assembly of the sidewalls, the third guiding slope and the fourth guiding slope guide the sidewall limiting hole to allow the chassis stacking projection to at least partially enter the sidewall limiting hole.

Optionally, the chassis is provided with a sidewall support for supporting the sidewall.

Optionally, the end wall pillar is configured in a groove form, a notch of the groove faces the outside of the tank, a first opening is arranged on an outer side wall of the groove, a limiting groove reinforcing plate is arranged inside the groove, a second opening is arranged on the limiting groove reinforcing plate, and the first opening and the second opening form the end wall limiting notch.

Optionally, the side wall column is provided with a hook plate, the outer side wall of the groove of the end wall column is provided with a first column notch matched with the hook plate, and the bottom of the end wall column is provided with a second column notch, so that the end wall can move outwards to increase the size in the box when the tray box is assembled.

Optionally, a chamfer is provided at the bottom of the second long groove, and the chamfer is inclined from the inside of the tank to the outside of the tank, so that the width of the bottom notch of the second long groove is greater than the width of the upper part of the second long groove.

Optionally, the end wall has an end wall lock, the end wall lock includes an end wall lock lever, the side wall stand has an end wall lock hole, wherein, when the end wall with the side wall is assembled, the end wall stand is hooked by the hook plate, and the end wall lock lever is inserted into the end wall lock hole, with the end wall with the side wall is connected.

Optionally, the end wall lock further comprises:

an end wall lock handle connected with the end wall lock rod; and

an end wall lock handle mount for retaining the end wall lock handle when the end wall lock is locked.

Optionally, a side of the end wall lock handle fixing piece away from the side wall is provided with a flanging to increase the stroke of the end wall lock rod, and/or

The end wall lock handle fixing piece is arranged below the end wall lock rod, and the upper end of the end wall lock handle fixing piece is provided with a chamfer so as to increase the moving space of the end wall lock handle when the end wall lock is opened and locked.

Optionally, at least one of the side walls comprises:

the door frame comprises a door frame upright post and a door frame lower beam, the door frame upright post forms the side wall upright post, and an inclined reinforcing rib is arranged at the joint of the door frame upright post and the door frame lower beam; and

and the lower corner of the door is provided with a lower corner inclined plane matched with the inclined reinforcing rib.

Optionally, the door includes a door sill configured as a downwardly opening door sill channel,

a long circular tube arranged along the length direction of the lower beam of the doorframe is fixed on the lower beam of the doorframe,

when the door is installed on the door frame, the door lower beam groove is buckled on the long circular tube so that the door lower beam is connected with the door frame lower beam.

Optionally, the upper end of the door frame upright post is provided with a tapered groove facing the outside of the box and a connecting pin, the connecting pin is positioned in the tapered groove,

the upper corner of the door is provided with a conical table and a connecting hole, the connecting hole is arranged in the conical table, the conical table is used for being matched with the conical groove, the connecting hole is used for being matched with the connecting pin,

wherein the tapered land is at least partially located in the tapered slot and the connecting pin is at least partially located in the connecting hole when the door is closed.

Optionally, the door has a side wall lock, the side wall lock has a side wall lock bar, the door frame column has a side wall lock hole, and in the closed state of the door, the side wall lock bar is inserted into the side wall lock hole.

Optionally, the side wall comprises a side wall lower beam.

Optionally, the door frame lower beam forms the side wall lower beam.

Optionally, the side wall lower beam is provided with a mounting groove with an opening facing the outside of the box, at least one of the two side wall hinge shafts is configured as a bolt shaft, a lower corner of the side wall corresponding to the bolt shaft is provided with a threaded hole, and the bolt shaft is mounted to the threaded hole through the mounting groove and penetrates into the first long groove so as to detachably connect the side wall and the chassis.

Optionally, the top of chassis stand is provided with chassis pile spare, chassis pile spare includes chassis pile boss with spacing lug, the bottom surface four corners on chassis with the corresponding position of chassis pile boss is provided with the pile hole, the pile hole can hold chassis pile boss to realize fold condition the pile of tray case.

Optionally, the top of the side wall column is provided with a side wall stacking boss, and in the assembled state, the position of the side wall stacking boss corresponds to the position of the stacking hole, and the stacking hole can accommodate the side wall stacking boss, so that the stacking of the pallet box in the assembled state is realized.

Optionally, door frame stand top is provided with door frame pile spare, door frame pile spare include lateral wall pile boss the bell jar with the connecting pin, lateral wall pile boss is followed the top of door frame stand upwards protrudes under the assemblage state, lateral wall pile boss's position with the position in pile hole is corresponding, the pile hole can hold lateral wall pile boss, in order to realize the assemblage state the pile of tray case.

Drawings

The following drawings of the invention are included to provide a further understanding of the invention. The drawings illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention. In the drawings:

FIG. 1 is a perspective view of a pallet box according to a preferred embodiment of the present invention;

FIG. 2 is an enlarged view of portion A of FIG. 1;

FIG. 3 is an enlarged view of portion B of FIG. 1;

FIG. 4 is an enlarged view of portion C of FIG. 1;

FIG. 5 is a perspective view of the chassis of the tray box according to the preferred embodiment of the present invention;

FIG. 6 is an enlarged view of portion D of FIG. 5;

FIG. 7 is a perspective view of an end wall of a tray box according to a preferred embodiment of the present invention;

FIG. 8 is an enlarged view of section E in FIG. 7;

FIG. 9 is a perspective view of a side wall of a tray box according to one embodiment of the present invention;

FIG. 10 is an enlarged view of portion F of FIG. 9;

FIG. 11 is an enlarged view of portion G of FIG. 9;

FIG. 12 is a perspective view of a door frame of a side wall of a pallet box according to another embodiment of the invention;

FIG. 13 is an enlarged view of portion H of FIG. 12;

FIG. 14 is a perspective view of a door of a side wall of a tray box according to another embodiment of the present invention;

FIG. 15 is an enlarged view of portion I of FIG. 14;

FIG. 16 is a partial perspective view of a door of a side wall of a tray box according to another embodiment of the present invention; and

fig. 17a-17f are schematic views of the assembly process of the side walls of the tray box according to the preferred embodiment of the present invention.

Description of reference numerals:

10: side wall

11: side wall stacking boss

12: side wall column

13: hook plate

15: side wall lower beam

16: first mounting groove

17: side wall articulated shaft

18: bolt shaft

19: end wall lock hole

20: end wall

21: end wall column

21A: outer side wall of upright post

21B: first opening

22: end wall hinge shaft

23: end wall limiting notch

24: limit groove reinforcing plate

24B: second opening

25: first column gap

26: second column gap

30: chassis

31: chassis upright post

32: first long groove

33: second long groove

33A: side opening

34: side wall support

35: beveling

36: chassis end beam

37: first surface

38: second surface

39: vertical edge of end beam

40: door frame

41: door frame stacking piece

42: doorframe column

43: doorframe lower beam

44: long round tube

46: second mounting groove

47: tapered groove

48: connecting pin

49: side wall lock hole

50: door with a door panel

51: door connector

52: door lower beam

53: door sill groove

54: side wall lock

55: side wall lock rod

57: conical table

58: connecting hole

59: lower door corner inclined plane

60: end wall lock

61: end wall lock bar

62: end wall lock base

63: end wall lock handle

64: handle fixing part of end wall lock

65: flanging

66: chamfering

67: fixing rod

68: trough

69: holding rod

81: chassis stacking piece

84: spacing lug

84A: second guide inclined plane

85: base plate stacking boss

85A: first guide inclined plane

91: side wall lower corner fitting

92: stacking part

93: side wall limiting hole

94: gap of stacking part

95: top surface of the gap

96: outer end wall of limiting hole

97: outer side wall of limiting hole

98: inclined reinforcing rib

100: tray box

Detailed Description

In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. It will be apparent, however, to one skilled in the art, that embodiments of the invention may be practiced without one or more of these specific details. In other instances, well-known features have not been described in detail so as not to obscure the embodiments of the invention.

Exemplary embodiments according to the present invention will now be described in more detail with reference to the accompanying drawings. These exemplary embodiments may, however, be embodied in many different forms and should not be construed as limited to only the embodiments set forth herein. It should be understood that these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of these exemplary embodiments to those skilled in the art. In the drawings, the same reference numerals are used to designate the same elements for the sake of clarity, and thus their description will be omitted.

Herein, the terms of directions such as "up", "down", "top", "bottom", "inside" and "outside" are all corresponding directions when the tray box is in normal use. Herein, a direction perpendicular to the end walls of the tray case is defined as a length direction of the tray case, and a direction perpendicular to the side walls of the tray case is defined as a width direction of the tray case.

The following detailed description is to be read in connection with specific embodiments.

The invention provides a tray box with detachable and foldable four walls.

As shown in fig. 1, the tray case 100 according to the preferred embodiment of the present invention is composed of a bottom chassis 30, two side walls 10 oppositely disposed on the bottom chassis 30, and two end walls 20 oppositely disposed on the bottom chassis 30.

As shown in fig. 5 and 6, the chassis 30 is rectangular. Chassis uprights 31 are provided at four corners of the chassis 30. The chassis upright 31 comprises a first surface 37 facing the side wall 10 and a second surface 38 facing the end wall 20 in the erected state of the pallet box 100. The top of the chassis upright column 31 is provided with a chassis stacking boss 85, and the chassis stacking boss 85 protrudes upwards from the top of the chassis upright column 31. The first surface 37 of the chassis upright 31 is provided with a first elongated slot 32. A second elongated slot 33 is provided in a second surface 38 of the chassis upright 31. At least one second long groove 33 is provided with a side opening 33A, and the side opening 33A communicates with the outside of the tank in a direction opposite to the first surface 37 of the second long groove 33. Preferably, the upper end of each second elongated slot 33 is provided with a side opening 33A communicating with the outside of the tank to facilitate easier installation of the end wall 20 (described in more detail below). A stop tab 84 extends from the second surface 38 of the chassis upright 31. The limit projection 84 is located above the side opening 33A.

As shown in fig. 7 and 8, the end wall 20 has an end wall pillar 21. End wall hinge axes 22 extend outwardly from both sides of the bottom of the end wall 20. Specifically, the end wall hinge shafts 22 are respectively provided on both sides of the bottom of the end wall stand 21 that face the second surface 38 in the erected state of the tray case 100, and extend from the end wall stand 21 in a direction perpendicular to the end wall stand 21 away from the end wall 20. The end wall hinge axis 22 is used to enter the second elongated slot 33 to hinge the end wall 20 to the chassis 30. The end wall stud 21 has an end wall retention notch 23. An end wall retention notch 23 is located above the end wall hinge axis 22. When the end wall 20 is assembled, the end wall limiting notch 23 cooperates with the limiting projection 84 of the chassis upright 31 to limit the upward movement of the end wall 20 (as shown in fig. 2). Specifically, after the end wall 20 is assembled, the retention tab 84 is at least partially positioned within the end wall retention notch 23 to limit upward movement of the end wall 20.

As shown in fig. 9 and 10, the side wall 10 has a side wall pillar 12. Side wall hinge shafts 17 extend outward from both sides of the bottom of the side wall 10. Specifically, the side wall hinge shafts 17 are respectively provided at both sides of the bottom of the side wall 10 toward the first surface 37 in the erected state of the tray case 100, and extend from the side wall 10 in a direction perpendicular to the side wall pillar 12 away from the side wall 10. The sidewall hinge 17 is used to enter the first elongated slot 32 to hinge the sidewall 10 to the chassis 30. The bottom end of the sidewall upright 12 is provided with a sidewall limiting hole 93 with a downward opening. The side wall stopper hole 93 is located above the side wall hinge shaft 17. After the side walls 10 are assembled, the side wall limiting holes 93 are matched (sleeved) with the chassis stacking bosses 85 of the chassis upright posts 31 so that the side walls 10 are kept upright (as shown in fig. 2). That is, after the side walls 10 are assembled, the chassis stacking tabs 85 are at least partially positioned within the side wall limiting holes 93 to keep the side walls 10 upright.

The bottom position of the second long groove 33 is lower than the bottom position of the first long groove 32. When the pallet box 100 is folded, the two end walls 20 are first folded over. Because the side wall limiting hole 93 and the chassis stacking boss 85 are mutually sleeved and inserted, the two side walls 10 can keep an assembled state at the moment and cannot topple towards the inside of the box, and therefore the end wall 20 which is firstly folded down cannot be smashed or the injury to operators cannot be caused. When the tray box 100 is assembled, the two side walls 10 are assembled first, and also because the side wall limiting hole 93 and the chassis stacking boss 85 are inserted into each other, the two side walls 10 can be kept in an assembled state, and an operator can safely continue to assemble the end wall 20. Thereby enabling a single person to complete folding and assembling the pallet box 100.

A more complete appreciation of the present invention and many of its attendant advantages will be further described below in connection with the method of mounting the side walls 10 and end walls 20.

As shown in fig. 9 to 11, the side wall 10 includes a side wall lower beam 15. The side wall lower beam 15 has a first mounting groove 16 opened to the outside of the tank. At least one of the two sidewall hinge shafts 17 of each sidewall 10 is a bolt shaft 18. Preferably, one of the two sidewall hinge shafts 17 is a bolt shaft 18. The lower corner of the side wall 10 corresponding to the bolt shaft 18 has a threaded hole (not shown), and the bolt shaft 18 is mounted to the threaded hole through the first mounting groove 16 and further penetrates the first long groove 32 of the chassis pillar 31, so that the side wall 10 is detachably connected to the chassis 30.

The method for mounting the side wall 10 comprises the following steps: placing at least the upper portion of the side wall 10 on the box inside side of the chassis pillar 31 and substantially laying the side wall 10 in a box outside-up manner; firstly, obliquely inserting the side wall hinge shaft 17 into a first long groove 32 of a corresponding chassis upright column 31; aligning the threaded hole at the other end with the corresponding first long groove 32 of the chassis upright column 31; the bolt shaft 18 is threaded into the threaded hole and the polished rod shaft at the front end of the bolt shaft 18 enters the corresponding first elongated slot 32, thereby completing the installation of the side wall 10, with the side wall 10 in the folded state. The side wall 10 can be disassembled by operating in the reverse order.

Referring to fig. 6 to 8, if only one second long groove 33 is provided with a side opening 33A at the upper end thereof to communicate with the outside of the tank, the end wall 20 is mounted by: placing at least the upper portion of the end wall 20 on the inside side of the box of the chassis upright 31 and substantially laying the end wall 20 flat with the outside of the box facing upward; the hinge shaft 22 of one end wall is inserted into the second long groove 33 without the side opening 33A, and the side of the end wall 20 is contacted with the chassis 30; the end wall hinge shaft 22 on the other side is then lowered into alignment with the side opening 33A, and the end wall hinge shaft 22 on this side is fed into the second elongated slot 33 from the side opening 33A, completing the installation of the end wall 20, with the end wall 20 in the folded state. The end wall 20 is removable by operating in the reverse order.

As shown in fig. 6, the limit projection 84 is positioned above the side opening 33A. When the end wall 20 is installed, in the process of falling the end wall hinge shaft 22 which enters the second long groove 33 and is aligned with the side opening 33A, in order to avoid interference with the limiting projection 84 in the process of falling the end wall upright post 21, the limiting projection 84 is not too long to protrude out of the chassis upright post 31, however, the connection stability of the limiting projection 84 and the end wall limiting notch 23 is affected. Therefore, it is preferable that the upper end of each second long groove 33 is provided with a side opening 33A communicating with the outside of the tank. In the preferred embodiment, the method of mounting the end wall 20 is: substantially laying the end wall 20 with the outside of the tank facing upwards; firstly, inserting the end wall upper beam into the chassis from the position between the limit lug 84 and the chassis end beam 36, and at least placing the upper part of the end wall 20 on one side of the inner side of the chassis upright column 31; the end wall 20 is then assembled by feeding the two end wall hinge shafts 22 into the second elongated slots 33 from the two side openings 33A, respectively, with the end wall 20 in the folded condition. The end wall 20 is removable by operating in the reverse order.

Since the side wall 10 can be stably held in the assembled state by inserting the side wall stopper hole 93 and the chassis stacking projection 85 into each other, the side wall 10 can be assembled first, and then the end wall 20 can be assembled in the assembled state of the side wall 10. The removal of the tray box 100 can be accomplished by operating in the reverse order of the installation process. It will be appreciated that the installation and removal of the pallet box 100 can still be accomplished by only one person.

A more complete appreciation of the present invention and many of its attendant advantages will be further described below in connection with the method of assembling the side walls 10 and end walls 20.

The method of assembling the side wall 10 will be described first.

As shown in fig. 6, in the preferred embodiment of the present invention, the top end of the chassis column 31 is provided with a chassis stacking member 81, and the chassis stacking member 81 includes a chassis stacking projection 85 and a limit projection 84. The chassis stacker 81 is preferably a forged or cast part. As shown in fig. 10, a sidewall lower corner piece 91 is preferably provided at the bottom end of the sidewall upright 12 and at the lower corner of the sidewall 10. The sidewall lower corner piece 91 includes a stacking portion 92, and the stacking portion 92 includes a sidewall stopper hole 93. The sidewall lower corner piece 91 further includes a sidewall hinge shaft 17 (or a mounting threaded hole of the bolt shaft 18). . The sidewall lower corner piece 91 is preferably cast.

In order to facilitate the assembly of the side wall 10, it is preferable that a first guide slope 85A (shown in fig. 6) be provided on the chassis stacking projection 85; more preferably, a second guide slope 84A (shown in fig. 6) may be provided at an upper end of the restriction protrusion 84; more preferably, the stacking section notch 94 may be provided in a stopper hole outer side wall 97 of the side wall stopper hole 93 (as shown in fig. 10). Specifically, the first guide slope 85A is configured inside the box of the chassis stacking boss 85, that is, a slope of the vertical end wall 20 obliquely facing the inside of the box is configured at the top of the chassis stacking boss 85, so that the inclination angle of the slope is in compliance with the movement trajectory of the stacking portion 92 (specifically, the lower edge of the limiting hole outer side wall 97 of the side wall limiting hole 93) during the rotational assembly of the side wall 10. The second guide ramp 84A is inclined in a manner similar to the first guide ramp 85A, is generally perpendicular to the end wall 20 and extends from the lower side of the interior of the tank to the upper side of the exterior of the tank. The stacking portion notch 94 is opened upward from the bottom of the stacking portion 92, specifically, the stacking portion notch 94 is opened upward from the bottom of the limiting hole outer side wall 97 of the side wall limiting hole 93, and the width of the stacking portion notch 94 is greater than the width of the chassis stacking boss 85.

Fig. 17a to 17f show the function of the first guiding inclined surface 85A and the second guiding inclined surface 84A, and the guiding process of the second guiding inclined surface 84A and the first guiding inclined surface 85A when the side wall 10 is assembled.

When the side wall 10 is assembled, the side wall 10 rotates from the inside of the tank to the outside of the tank about the side wall hinge shaft 17. As shown in fig. 17a, the bottom of the sidewall lower corner fitting 91 rests on the sidewall seat 34. In the case where the bottom portion of the side wall lower corner piece 91 contacting the side wall support 34 is substantially right-angled, if the second guide slope 84A is not present, the stacking portion 92 (specifically, the lower edge of the stopper hole outer end wall 96 of the side wall stopper hole 93) may interfere with the stopper projection 84 (if the bottom portion of the side wall lower corner piece 91 contacting the side wall support 34 is not right-angled but rounded, the side wall 10 falls, the interference is more severe, and therefore the portion should be as right-angled as possible). As shown in fig. 17c, when the second guide slope 84A is provided, the stacking portion 92 does not interfere with the stopper projection 84.

It will be appreciated that the first guide ramp 85A may serve to reduce interference of the stacking portion 92 (specifically, the limiting hole outer side wall 97 of the side wall limiting hole 93) with the chassis stacking boss 85, so that the chassis stacking boss 85 enters the side wall limiting hole 93 more smoothly, similarly to the function of the second guide ramp 84A. As shown in fig. 17b, although the first guide slope 85A is provided, the stacking portion 92 may not contact the first guide slope 85A and may be caught. In order to make the stacking portion 92 contact the first guide slope 85A, the slope of the first guide slope 85A may be increased, and the height of the chassis stacking boss 85 may be decreased. While increasing the slope of the first guiding slope 85A will increase the sliding resistance of the stacking portion 92 on the first guiding slope 85A, and decreasing the height of the chassis stacking projection 85 will decrease the stacking depth when the tray box 100 is folded and stacked, resulting in a decrease in safety. As shown in fig. 17d, the stacking portion notch 94 is provided to ensure that the stacking portion 92 contacts the first guiding inclined surface 85A. Specifically, as shown in fig. 17e, the notch top surface 95 of the stacker notch 94 contacts the first guide slope 85A.

When the side wall 10 is assembled, the guiding process of the second guiding inclined surface 84A and the first guiding inclined surface 85A is as shown in fig. 17c to 17 f. The side wall 10 is assembled from the inside of the box to the outside of the box in a rotating manner, and a certain gap is formed between the stacking part 92 and the second guiding inclined surface 84A when the stacking part is adjacent to the second guiding inclined surface (as shown in FIG. 17 c); continuing to rotate the side wall 10, the outer end wall 96 of the side wall limiting hole 93 of the stacking portion 92 contacts the second guiding inclined surface 84A first, and the stacking portion 92 ascends along with the rotation of the side wall 10 (as shown in fig. 17 d); the side wall 10 continues to rotate, the stacking portion 92 continues to ascend, so that the notch top surface 95 of the stacking portion notch 94 is in contact with the first guide inclined surface 85A, and along with the rotation of the side wall 10, the stacking portion 92 continues to ascend, so that the limiting hole outer end wall 96 of the stacking portion 92 is separated from the second guide inclined surface 84A (as shown in fig. 17 e); the side wall 10 continues to rotate, and under the guidance of the first guiding inclined surface 85A, the chassis stacking boss 85 enters the side wall limiting hole 93, so as to limit the side wall 10 in the upright state (as shown in fig. 17 f). That is, when the side walls 10 are erected, the second guiding inclined surface 84A and the first guiding inclined surface 85A sequentially guide the stacking portion 92 so that the chassis stacking projection 85 enters at least partially into the side wall stopper hole 93.

The above-described first guide slope 85A and second guide slope 84A are provided on the chassis column 31 to guide the movement of the pile portion 92, specifically, the movement of the side wall stopper hole 93. It will be appreciated that, in order to guide the rotation of the side walls 10 during assembly, guide surfaces having corresponding functions may also be provided on the stacking portion 92 of the side walls 10. Specifically, for example, a third guide slope may be provided on the lower end surface of the stopper hole outer side wall 97 of the side wall stopper hole 93, and a fourth guide slope may be provided on the lower end surface of the stopper hole outer end wall 96. The inclination angles of the third guide slope and the fourth guide slope also need to be in compliance with the movement locus of the stacking portion 92 (specifically, the lower edge of the limiting hole outer side wall 97 of the side wall limiting hole 93) during the rotational assembly of the side wall 10, so as to realize a desired guide function.

When the side wall 10 is folded, the side wall 10 is lifted upwards to separate the side wall limiting hole 93 from the chassis stacking lug boss 85, and then the side wall 10 is rotated towards the box to be folded.

As shown in fig. 5 and 6, the chassis 30 is preferably provided with a sidewall support 34, and the sidewall support 34 supports the sidewall 10. The purpose of the sidewall standoffs 34 is to facilitate folding of the sidewall 10. When the side wall 10 is folded, the side wall limiting hole 93 can be separated from the chassis stacking boss 85 only by lifting the side wall 10 upwards for a small distance. If the side wall support 34 is not provided, since the hinge axis 17 of the side wall is located at a lower position and the two end walls 20 folded first have a certain height, the side wall 10 needs to be lifted a larger distance to be folded, which is inconvenient to operate, especially when the self weight of the side wall 10 is larger. In addition, the side wall support 34 supports the bottom of the side wall lower corner fitting 91, the side wall 10 is stable during the assembling rotation, if the side wall support 34 is not provided, the bottom of the side wall 10 is suspended during the assembling rotation, so that the folded end wall 20 is supported near the bottom of the side wall 10, the support is not stable, and the side wall 10 is easy to be obliquely clamped during the assembling.

The specific construction associated with the assembly of the end wall 20 will be described in detail before the method of assembly of the end wall 20 is described.

As shown in fig. 7 and 8, the end wall studs 21 are channel shaped in cross-section with the channel facing outwardly of the tank. The end wall stud is also referred to as an end wall stud slot. The outer side wall of the groove, namely the outer side wall 21A of the end wall upright post is provided with a first opening 21B, and a limiting groove reinforcing plate 24 is arranged in the groove. The limiting groove reinforcing plate 24 is provided with a second opening 24B, and the first opening 21B and the second opening 24B form an end wall limiting notch 23. Preferably, the limiting groove reinforcing plate 24 is a U-shaped plate, and two parallel walls of the U-shaped plate are arranged along the end wall column groove and fastened on the bottom surface of the end wall column groove. In this way, the retaining groove reinforcement plate 24 closes the region of the end wall retaining notch 23 except for the end wall retaining notch 23. The peripheries of the limiting groove reinforcing plates 24 can be welded with the end wall upright post grooves, and the end wall upright posts 21 with weakened strength due to the end wall limiting notches 23 can be better strengthened. It will be appreciated that the end wall restraint notches 23 may be otherwise configured, such as without the restraint slot reinforcement panel 24, or the restraint slot reinforcement panel 24 may be a flat panel having a second opening 24B that is identical to the first opening 21B. The limiting groove reinforcing plate 24 is welded on the inner side surface of the end wall upright post outer side wall 21A, and the first opening 21B is aligned with the second opening 24B. The end wall retaining notches 23 are not in communication with the interior of the bin to keep the interior of the bin flat and reduce holes and gaps.

As shown in fig. 3, the side wall pillar 12 is provided with the hook plate 13, and the first pillar notch 25 is provided at a position where the end wall pillar outer side wall 21A engages with the hook plate 13 in the assembled state. As shown in fig. 8, the bottom of the end wall stud 21 is provided with a second stud notch 26. As shown in fig. 2 and 6, in the assembled state of the end walls 20, the second stud notch 26 engages an end rail standing edge 39 of the chassis end rail 36. Thus, due to the arrangement of the first column notch 25 and the second column notch 26, the end wall 20 can be moved outwards, and the inner size of the box can be increased.

As shown in fig. 6, the bottom of the second elongated slot 33 for receiving the end wall hinge shaft 22 is provided with a chamfer 35. The chamfer 35 is inclined from the inside of the tank to the outside of the tank so that the bottom notch width of the second long groove 33 is larger than the upper width of the second long groove 33. As the bottom notch of the second elongated slot 33 widens, the end wall hinge shaft 22 can move toward the outside of the tank at the notch so that the end wall 20 can move toward the outside of the tank. When the end wall 20 is removed, the chamfer 35 may guide the end wall hinge axis 22 into the second elongated slot 33. The width of the upper part of the second long groove 33 is matched with the shaft diameter of the end wall hinge shaft 22, so that the end wall hinge shaft 22 can be guided to move up and down when the end wall 20 is assembled and disassembled.

As shown in fig. 3, the end wall 20 is provided with an end wall latch 60. The end wall latch 60 has an end wall latch receptacle 62 secured to the end wall 20. An end wall lock bar 61 is disposed within the end wall lock seat 62. The side wall uprights 12 have end wall locking holes 19. When the end wall 20 is assembled, the hook plate 13 hooks the end wall upright post 21, and the end wall lock 61 is inserted into the end wall lock hole 19 to connect the end wall 20 with the side wall 10.

The method of assembling the end wall 20 is: after the side walls 10 are assembled, the end wall 20 is rotated from the inside of the box to the outside of the box until the end wall 20 is erected, the limit projection 84 is at least partially positioned in the end wall limit notch 23, the hook plate 13 hooks the end wall upright outer side wall 21A at the first upright notch 25, and the second upright notch 26 abuts against the end beam upright edge 39; the locking of the end wall latch 60 is completed, thereby completing the erection of the end wall 20. The end wall 20 is then folded by operating in the reverse order.

It will be appreciated that during the process of pulling up the end wall 20 outwardly of the tank, the lower end of the end wall upright 21 will rotate against the end beam upright 39 as the end wall 20 is forced outwardly of the tank, and the second upright notch 26 will abut against the end beam upright 39 when the end wall 20 is erected. After the pallet box 100 is loaded with cargo, the second column gap 26 is ensured to abut against the end beam stile 39 due to the pressure of the cargo against the end wall 20, thereby ensuring the volume inside the pallet box 100.

The assembly process of the tray box 100 is briefly described as follows: firstly, assembling two side walls 10, and inserting a side wall limiting hole 93 and a chassis stacking lug boss 85 in a sleeving manner to keep the side walls upright; the two end walls 20 are then assembled so that the hook plate 13 hooks the end wall posts 21 and the end wall lock 60 is locked to complete the assembly of the pallet box 100. The folding method of the tray box 100 is: the end wall lock 60 is opened and the two end walls 20 are folded, the two end walls 20 being folded out of order; the side walls 10 are folded after being lifted, and the two side walls 10 are folded in no sequence.

Since the erection and folding of the end wall 20 is premised on the side wall 10 being stably erected, the bottom of the second elongated slot 33 should be lower than the bottom of the first elongated slot 32 so that the end wall 20 can be folded later on the side wall 10 before the side wall 10 is erected.

It will be appreciated that the width of the upper portion of the second slot 33 matches the diameter of the end wall hinge 22, which not only ensures the strength of the chassis upright 31 at the second slot 33, but also ensures the folding position of the second folded end wall 20, avoiding interference with the upright end beam 39 during assembly.

It will be appreciated that the pallet box 100 may also be assembled by first installing the two end walls 20 and temporarily placing them in the collapsed condition; then installing the two side walls 10 and assembling the two side walls 10; finally, the two end walls 20 are assembled to complete the assembly of the pallet box 100.

As shown in fig. 3, end wall latch 60 also includes an end wall latch handle 63 and an end wall latch handle retainer 64. End wall lock handle 63 is connected to end wall lock lever 61 such that end wall lock lever 61 is movable with end wall lock handle 63. An end wall lock handle retainer 64 is located below the end wall lock seat 62. The end wall lock handle retainer 64 is configured with a slot 68 for receiving a retaining rod 67 of the end wall lock handle 63. When the end wall latch 60 is latched, the fixing lever 67 is positioned in the groove 68, so that the end wall latch handle 63 is restrained, so that the end wall latch 61 is also restrained, preventing the end wall latch 61 from coming out of the end wall latch hole 19.

End wall lock handle retainer 64 has a flange 65, which flange 65 is disposed on the side of end wall lock handle retainer 64 remote from side wall 10. When the end wall 20 is folded, the end wall lock 60 needs to be opened first, the end wall lock 61 needs to be withdrawn from the end wall lock hole 19, and the end head of the locking end of the end wall lock 61 needs to be withdrawn into the end wall upright post 21, so that the end wall lock 61 and the side wall 10 are prevented from interfering to affect operation or damage the side wall cladding plate in the folding and assembling processes of the end wall 20. After the end of the locking end of the end wall locking lever 61 retracts into the end wall upright post 21, the fixing rod 67 of the end wall locking handle 63 contacts the flange 65 of the end wall locking handle fixing piece 64, and the flange 65 prevents the end wall locking handle 63 from moving towards the side wall 10, so that the end wall locking lever 61 is prevented from extending out of the end wall upright post 21.

When end wall latch 60 is latched, securing rod 67 is positioned in slot 68. When the end wall latch 60 is open, the securing lever 67 is located on the side of the flange 65 remote from the side wall 10. It will be appreciated that since the end wall lock knob 63 moves integrally with the end wall lock bar 61, the distance of travel of the end wall lock bar 61 from the open position to the locked position is at least the sum of the distance of the inside of the slot 68 away from the side wall 10 to the flange 65 and the width of the securing bar 67. The further the flange 65 is from the slot 68, the greater the travel of the end wall latch 61. Therefore, compared with the situation that the flange 65 is not arranged, the stroke of the end wall lock rod 61 can be increased by arranging the flange 65, so that the length of the end wall lock rod 61 inserted into the end wall lock hole 19 can be increased, the end wall lock rod 61 is prevented from being separated from the end wall lock hole 19 in the use process of the tray box 100, and the locking of the end wall lock 60 is safer and more reliable.

The upper end of the end wall lock handle retainer 64 has a chamfer 66, specifically, chamfer 66 is provided at the upper notch of slot 68. As a rule of thumb, during the process of locking and unlocking the end wall lock 60, when the movement resistance of the end wall lock lever 61 is large, the operator swings the end wall lock handle 63 up and down (to rotate or move the end wall lock lever 61 up and down) while moving the end wall lock handle 63 left and right to overcome the resistance. Thus, the securing lever 67 of the end wall lock handle 63 needs to reciprocate up and down in the space between the end wall lock housing 62 and the end wall lock handle securing member 64. If the space between end wall lock receptacle 62 and end wall lock handle retainer 64 is too small, the extent of upward and downward swinging of end wall lock handle 63 is limited to the detriment of operation. Therefore, providing the chamfer 66 can increase the operating space for the end wall lock handle 63 to swing up and down. If the chamfer 66 is not provided and the position of the end wall lock handle fixing member 64 is moved downward, although the operation space for the upward and downward swinging of the end wall lock handle 63 can be increased, the end wall lock handle 63 needs to be lengthened (for example, the size of the end wall lock handle 63 in the upward and downward direction in fig. 3 needs to be increased) to ensure that there is a sufficient distance between the holding rod 69 of the end wall lock handle 63 and the end wall lock handle fixing member 64 to prevent the end wall lock handle fixing member 64 from hurting the hand during operation. It will be appreciated that the closer the gripping lever 69 (i.e., the point of application) is to the end wall lock lever 61, the more advantageous it is to move the end wall lock lever 61 smoothly, while the lengthening of the end wall lock handle 63 not only wastes material but also causes the end wall lock lever 61 to move less smoothly.

As shown in fig. 1, in one embodiment, at least one side wall 10 is comprised of a door 50 and a doorframe 40. In the preferred embodiment, one side wall 10 of the pallet box 100 is comprised of a door 50 and a doorframe 40. The door 50 is detachable from the doorframe 40 to facilitate loading and unloading of articles.

As shown in fig. 12, the doorframe 40 includes a doorframe column 42 and a doorframe lower beam 43. The door frame pillar 42 forms a sidewall pillar of the sidewall 10. The bottom portions of the two frame posts 42 are respectively provided with a side wall hinge shaft 17. The door frame lower beam 43 forms a side wall lower beam of the side wall 10. Preferably, the lower end of the door frame upright 42 is connected to the door frame lower beam 43 by a side wall lower corner piece 91. The junction of the door frame upright 42 and the door frame lower beam 43 has an inclined reinforcing rib 98, i.e., the side wall lower corner fitting 91 includes the inclined reinforcing rib 98. The inclined reinforcing rib 98 can reinforce the strength of the junction of the doorframe column 42 and the doorframe lower beam 43, reduce the deformation of the upper end opening of the doorframe 40 in use, and reduce the height of the doorframe lower beam 43.

As shown in fig. 14 and 16, the lower corner of door 50 has a lower door corner chamfer 59 that mates with a diagonal reinforcement rib 98. Such a structure ensures the connection strength between the doorframe upright post 42 and the doorframe lower beam 43, and also makes the height of the doorframe lower beam 43 smaller. Since the pallet box is often used to carry rubber blocks, and the rubber blocks located at the lowermost layer of the pallet box are compressed and deformed due to the fluidity of the rubber blocks, and are difficult to be discharged, the user desires that the lower the door frame lower beam 43 is, the better, which is one of the prominent features of the pallet box 100 according to the present invention, compared to the same type of box.

As shown in fig. 12, the doorframe lower beam 43 has a second mounting groove 46 that opens to the outside of the box. At least one of the two sidewall hinge shafts 17 of each door frame 40 is a bolt shaft 18. It is preferable that one of the two sidewall hinge shafts 17 of each door frame 40 is a bolt shaft 18. The lower corner portion of the door frame 40 corresponding to the bolt shaft 18 has a screw hole (not shown), and the bolt shaft 18 is mounted to the screw hole through the second mounting groove 46 and further penetrates the first long groove 32 of the chassis pillar 31, so that the side wall 10 is detachably coupled to the chassis 30. Preferably, a side wall lower corner piece 91 is arranged at the lower corner of the door frame 40, the side wall lower corner piece 91 comprises a stacking part 92 (comprising a side wall limiting hole 93), an inclined reinforcing rib 98, a side wall hinge shaft 17 (or a mounting threaded hole of a bolt shaft 18), and the side wall lower corner piece 91 is preferably a casting.

Similar to the installation method of the side wall 10 described above, the installation method of the door frame 40 is: the outside of the case of the door frame 40 is directed upward; firstly, obliquely inserting the side wall hinge shaft 17 into a first long groove 32 of a corresponding chassis upright column 31; aligning the threaded hole at the other end with the corresponding first long groove 32 of the chassis upright column 31; the bolt shaft 18 is screwed into the threaded hole, and the polished rod shaft at the front end of the bolt shaft 18 enters the corresponding first elongated slot 32, thereby completing the installation of the doorframe 40. The door frame 40 can be disassembled by operating in the reverse order.

As shown in fig. 12, a long circular tube 44 (or round steel) extending in the longitudinal direction of the lower doorframe beam is welded to the upper surface of the lower doorframe beam 43. As shown in fig. 14 and 16, the door sill 52 is configured with a downwardly opening channel, such as by a U-shaped beam configured door sill channel 53. When the door 50 is mounted to the doorframe 40, the door sill groove 53 is caught on the long circular tube 44 to connect the door sill 52 with the doorframe sill 43.

As shown in fig. 4, 12 and 13, the upper end of the doorframe post 42 is provided with a tapered groove 47 and a connecting pin 48 facing the outside of the case. Specifically, the door frame post 42 is provided at an upper end thereof with a door frame stacking member 41, and the door frame stacking member 41 includes a tapered groove 47 and a connecting pin 48. The door frame stacking member 41 is preferably a casting or forging. As shown in fig. 14 and 15, the upper corner of the door 50 is provided with a door connector 51. The door link 51 includes a tapered platform 57 and a link hole 58. The door connector 51 is preferably cast or forged. When the door 50 is closed, the tapered groove 47 engages with the tapered table 57, and the connecting pin 48 engages with the connecting hole 58. The door 50 has a sidewall lock 54, and the sidewall lock 54 has a sidewall lock lever 55. The door frame post 42 has a side wall locking hole 49 for receiving the side wall locking bar 55. The side wall latch 54 is identical or similar to the end wall latch 60 in construction, and includes a latch base, a latch handle retainer, and a lock handle retainer flange and chamfer, among other features.

The installation method of the door 50 is as follows: the door 50 is lifted, and the upper beam of the door inclines towards the outside of the box; the lower door beam 52 is aligned with the long circular tube 44, and the door 50 is dropped down, so that the lower door beam groove 53 is sleeved on the long circular tube 44; pushing the door upper beam with force to make the conical table 57 at least partially enter the conical groove 47 and make the connecting pin 48 at least partially enter the connecting hole 58; finally, the side wall latch 54 is latched to complete the installation of the door 50. The door 50 can be removed by operating in the reverse order.

As shown in fig. 4, in the closed state of the door 50, the door lower beam 52 is engaged with the door frame lower beam 43, the tapered table 57 is engaged with the tapered groove 47, the connecting pin 48 is engaged with the connecting hole 58, and the side wall lock lever 55 is engaged with the side wall lock hole 49, thereby achieving a stable connection of the door 50 with the door frame 40.

In a preferred embodiment, four corners of the bottom surface of the chassis 30 are provided with stacking holes (not shown) at positions corresponding to the positions of the chassis stacking bosses 85. The stacking holes can receive chassis stacking bosses 85. The stacking hole of the upper tray box 100 in the folded state is sleeved on the chassis stacking boss 85 of the lower tray box 100, so that the stacking of the tray box 100 in the folded state is realized. The top of the sidewall upright post 12 is provided with a sidewall stacking boss 11, or the top of the doorframe stacking member 41 of the doorframe upright post 42 is provided with a sidewall stacking boss 11, and the sidewall stacking boss 11 protrudes upward from the top of the corresponding upright post. In the assembled state of the tray case 100, the position of the side wall stacking boss 11 corresponds to the position of the stacking hole. The stacking holes may receive the sidewall stacking bosses 11. The stacking holes of the assembled upper layer tray box 100 are sleeved on the side wall stacking bosses 11 of the lower layer tray box 100, so that the stacking of the assembled tray box 100 is realized.

According to the tray box, the side walls can be prevented from toppling when being assembled, and the performance is safe and reliable; meanwhile, the end wall can be detached, so that the production, assembly, maintenance and replacement of the end wall are facilitated; the end walls and the side walls of the tray box are folded in no order, so that the operation is convenient; the multiple parts are integrally formed by forging or casting, so that the structure is simple, the cost is low, and the production and the maintenance are convenient; tray case pile and lateral wall assemblage are compromise to chassis pile boss function, further simplify the structure of tray case, promote user experience.

The present invention has been described in terms of the above embodiments, but it should be understood that the above embodiments are for purposes of illustration and description only and are not intended to limit the invention to the scope of the described embodiments. Furthermore, it will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that many variations and modifications may be made in accordance with the teachings of the present invention, which variations and modifications fall within the scope of the present invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A pallet box comprising a rectangular base pan, two end walls oppositely disposed on the base pan and two side walls oppositely disposed on the base pan, the side walls comprising side wall uprights, the end walls comprising end wall uprights, characterised in that,

the chassis stacking boss is arranged at the top of the chassis upright post;

a first elongated slot disposed on the first surface;

the side wall includes:

the end wall includes:

2. The tray box according to claim 1, wherein the box inside of the tray stacking lug has a first guide slope, and the upper end of the stopper projection has a second guide slope, so that the second guide slope and the first guide slope sequentially guide the sidewall stopper hole during the assembly of the sidewalls so that the tray stacking lug at least partially enters the sidewall stopper hole.

3. The tray case of claim 2, wherein an outer sidewall of the sidewall restraint hole has a stacking portion notch that opens upwardly from a bottom of the outer sidewall of the sidewall restraint hole, the stacking portion notch having a width that is greater than a width of the chassis stacking boss.

4. The pallet box of claim 2,

the outer side wall of the side wall limiting hole is provided with a third guide inclined surface, so that the third guide inclined surface guides the side wall limiting hole in the process of assembling the side wall, so that the chassis stacking lug boss at least partially enters the side wall limiting hole, and/or the chassis stacking lug boss

The outer end wall of the side wall limiting hole is provided with a fourth guide inclined surface, so that in the process of assembling the side walls, the fourth guide inclined surface guides the side wall limiting hole to enable the chassis stacking lug boss to at least partially enter the side wall limiting hole.

5. A pallet box according to any one of claims 1-4, characterized in that the chassis is provided with side wall supports for supporting the side walls.

6. The pallet box of claim 1, wherein the end wall stud is configured in the form of a slot, the slot having a notch facing outwardly of the box, a first opening provided on an outer side wall of the slot, a restraint slot reinforcement plate provided inside the slot, and a second opening provided on the restraint slot reinforcement plate, the first opening and the second opening constituting the end wall restraint notch.

7. The tray case of claim 6, wherein the side wall posts are provided with hook plates, the outer side walls of the slots of the end wall posts are provided with first post notches for mating with the hook plates, and the bottoms of the end wall posts are provided with second post notches so that the end walls can move outwardly to increase the inside dimension when the tray case is erected.

8. The tray box of claim 7, wherein a chamfer is provided at the bottom of the second elongated slot, the chamfer sloping from the inside of the box to the outside of the box such that the bottom slot width of the second elongated slot is greater than the upper width of the second elongated slot.

9. The tray case of claim 7,

the end wall having an end wall latch, the end wall latch including an end wall locking bar,

the side wall stud has an end wall locking hole,

when the end wall and the side wall are assembled, the hook plate hooks the end wall upright post, and the end wall lock rod is inserted into the end wall lock hole to connect the end wall with the side wall.

10. The tray bin of claim 9, wherein the end wall latch further comprises:

an end wall lock handle connected with the end wall lock rod; and

11. The tray case of claim 10,

a flange is arranged on one side of the end wall lock handle fixing piece, which is far away from the side wall, so that the stroke of the end wall lock rod is increased, and/or

12. The tray box of any of claims 1-11, wherein at least one of the side walls comprises:

13. The tray case of claim 12,

the door includes a door sill configured as a downwardly opening door sill channel,

14. The tray case of claim 13,

the upper end of the door frame upright post is provided with a conical groove and a connecting pin which face the outside of the box, the connecting pin is positioned in the conical groove,

15. The tray case of claim 14,

the door has a side wall lock with a side wall locking bar,

the upright post of the door frame is provided with a side wall lock hole,

in the closed state of the door, the side wall lock rod is inserted into the side wall lock hole.

16. The tray box of claim 1, wherein the side walls comprise side wall sills.

17. The tray box of claim 12, wherein the side walls include side wall sills, the door frame sill forming the side wall sills.

18. The tray box according to claim 16 or 17, wherein the side wall lower beam has a mounting groove opened to the outside of the box, at least one of the two side wall hinge shafts is configured as a bolt shaft, a lower corner portion of the side wall corresponding to the bolt shaft has a screw hole, and the bolt shaft is mounted to the screw hole through the mounting groove and penetrates the first long groove to detachably connect the side wall with the chassis.

19. The tray box according to claim 1, characterized in that a tray stacking member is arranged on the top of the tray column, the tray stacking member comprises the tray stacking boss and the limiting boss, stacking holes are arranged at four corners of the bottom surface of the tray at positions corresponding to the tray stacking boss, and the stacking holes can accommodate the tray stacking boss to realize stacking of the tray box in a folded state.

20. The tray box of claim 19, wherein the top of the sidewall posts is provided with sidewall stacking bosses, and the position of the sidewall stacking bosses corresponds to the position of the stacking holes in the assembled state, and the stacking holes can accommodate the sidewall stacking bosses to stack the tray box in the assembled state.

21. The tray box according to claim 14, wherein a tray stacking member is disposed on the top of the tray column, the tray stacking member includes the tray stacking boss and the limiting boss, stacking holes are disposed at four corners of the bottom surface of the tray at positions corresponding to the tray stacking boss, and the stacking holes can accommodate the tray stacking boss to stack the tray box in a folded state.

22. The tray box according to claim 21, wherein a door frame stacking member is disposed on the top of the door frame column, the door frame stacking member includes a side wall stacking boss, the tapered groove and the connecting pin, the side wall stacking boss protrudes upward from the top of the door frame column, in the assembled state, the position of the side wall stacking boss corresponds to the position of the stacking hole, and the stacking hole can accommodate the side wall stacking boss, so as to stack the tray box in the assembled state.