CN112141485A

CN112141485A - Folding tray box

Info

Publication number: CN112141485A
Application number: CN202010947771.7A
Authority: CN
Inventors: 苏继军; 孙士国
Original assignee: China International Marine Containers Group Co Ltd; CIMC Containers Holding Co Ltd; Dalian CIMC Logistics Equipment Co Ltd; Dalian CIMC Special Logistics Equipment Co Ltd
Current assignee: China International Marine Containers Group Co Ltd; Dalian CIMC Logistics Equipment Co Ltd; CIMC Transpack Technology Co Ltd
Priority date: 2020-09-10
Filing date: 2020-09-10
Publication date: 2020-12-29

Abstract

The invention discloses a folding tray box, comprising: a chassis; a first side wall and a second side wall which are oppositely arranged at two sides of the chassis and can be pivotally connected to the corner upright post between a folding state and an assembling state; the second sidewall pivot axis is higher than the first sidewall pivot axis by a distance C; first and second upper covers pivotably connected to top ends of the first and second side walls; in the assembled state, the distance between the first upper cover and the second upper cover along the horizontal direction is J, the horizontal distances from the first upper cover pivot axis and the second upper cover pivot axis to the inner side faces of the corner posts connected with the first upper cover and the second upper cover are F, C, F and J satisfy C + J > 2F, in the folded state, the first upper cover is stacked to the outer surface of the first side wall, and the second side wall and the second upper cover are both located on the first surface of the first upper cover. According to the folding tray box, the folding height can be effectively reduced, the transportation amount of the empty box during transportation is increased, and the transportation cost is reduced.

Description

Folding tray box

Technical Field

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

Background

The folding pallet box in the field of logistics transportation can save space and cost for empty box transportation or storage. The existing folding tray box is provided with an upper cover which is separated from the box body, such as a detachable integral upper cover. Such a folding tray box is not convenient to operate when folded and assembled, and the upper cover is easily lost and damaged. Still another cover is in the form of a two piece cover, and referring to the foldable pallet box 10 shown in fig. 1, two pieces of the cover 50 are each hinged to the top of the side walls 30, and the cover 50 is folded along with the side walls 30 when folded. The folding height of the folding tray box includes the thickness of the two upper covers 50, and the folding height is relatively high. In order to increase the transportation amount and reduce the transportation cost during empty container transportation, the folding height of the folding tray box should be reduced as much as possible, so that the folding tray box can be loaded into a container for transportation by one more layer.

To this end, the present invention provides a folding tray box to at least partially solve the problems in the related art.

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.

In order to at least partially solve the above problems, the present invention provides a folding tray box comprising:

the four corners of the chassis are provided with angular upright posts;

a first side wall disposed on one side of the chassis and pivotably connected to the corner post about a first side wall pivot axis;

a second side wall disposed on an opposite side of the chassis from the first side wall and pivotably connected to the corner post about a second side wall pivot axis that is higher than the first side wall pivot axis by a distance C;

a first upper cover pivotally connected to the top end of the first side wall about a first upper cover pivot axis;

a second upper cover pivotally connected to the top end of the second side wall about a second upper cover pivot axis;

wherein the first and second side walls are pivotable between a collapsed state and an assembled state,

in the assembled state, a distance between the first upper cover and the second upper cover in a horizontal direction is J, a horizontal distance between the first upper cover pivot axis and an inner side surface of the corner post connected to the first upper cover is F, a horizontal distance between the second upper cover pivot axis and an inner side surface of the corner post connected to the second upper cover is F, C, F, and J satisfy C + J > 2F,

in the folded state, the first upper cover is stacked to an outer surface of the first side wall, and the second side wall and the second upper cover are both located on a first surface of the first upper cover.

According to the folding tray box, the height distance C between the first side wall pivot axis and the second side wall pivot axis, the distance J between the first upper cover and the second upper cover along the horizontal direction in the assembled state, the horizontal distance F between the first upper cover pivot axis and the inner side surface of the corner upright connected with the first upper cover and the horizontal distance F between the second upper cover pivot axis and the inner side surface of the corner upright connected with the second upper cover are reasonably designed to meet the condition that C + J is more than 2F, so that the folding mode that the first upper cover is overlapped to the outer surface of the first side wall, and the second side wall and the second upper cover are both positioned on the first surface of the first upper cover can be realized when the folding tray box is in the folded state. The folding mode can effectively reduce the folding height of the folding tray box, increase the transportation amount of the empty box during transportation and reduce the transportation cost. In addition, the folding mode can enable the length of the first upper cover and the second upper cover to be as large as possible, so that the first upper cover and the second upper cover can completely cover the opening of the folding tray box when the folding tray box is in an assembled state.

Optionally, the thickness of the sidewall is W, and the relationship between F and W satisfies: f is more than 0.5W and less than W.

Optionally, the thickness of the first upper cover is smaller than the thickness of the first side wall.

Optionally, the corner stand column further comprises a side wall shaft connecting device, the first side wall is pivotally connected to the corner stand column through the side wall shaft connecting device, the second side wall is pivotally connected to the corner stand column through the side wall shaft connecting device, the side wall shaft connecting device comprises a side wall hinge shaft and a side wall threaded hole which are oppositely arranged at two ends of the bottom of the side wall, and a side wall bolt matched with the side wall threaded hole.

Optionally, the corner post connected to the side wall is provided with a side wall hinge hole for receiving the side wall hinge shaft and the side wall bolt.

Optionally, still include upper cover axle connecting device, first upper cover pass through upper cover axle connecting device but pivot ground is connected to the top of first lateral wall, the second upper cover pass through upper cover axle connecting device but pivot ground is connected to the top of second lateral wall, upper cover axle connecting device is including setting up the upper cover articulated shaft in one side of the pivot end of upper cover, setting up and being in the upper cover nut or the upper cover screw hole of the opposite side of pivot end, and with upper cover nut or upper cover screw hole matched with upper cover bolt.

Optionally, top ends of the first side wall and the second side wall are both provided with an upper cover hinge hole for receiving the upper cover hinge shaft and the upper cover bolt.

Optionally, the folding tray bin further comprises end walls disposed opposite the ends of the chassis, the end walls pivotally connecting the corner posts about end wall pivot axes.

Optionally, the corner posts connected to the end walls are provided with elongated holes for receiving the end wall pivot shafts.

Optionally, the first upper cover includes first support limiting plates disposed at both sides of the first upper cover, and the second upper cover includes second support limiting plates disposed at both sides of the second upper cover.

Optionally, the upper ends of the first sidewall upright of the first sidewall and the second sidewall upright of the second sidewall are both provided with T-shaped holes, and the T-shaped holes are located on the inner side faces of the first sidewall upright and the second sidewall upright facing the inside of the folding tray box.

Optionally, the foldable tray box comprises a connecting rod, and two ends of the connecting rod are provided with T-shaped hanging connectors matched with the T-shaped holes.

Optionally, a first communication hole is formed in an upper end of the first sidewall pillar, an axial direction of the first communication hole is parallel to the first sidewall, and a second communication hole is formed in an upper end of the second sidewall pillar, an axial direction of the second communication hole is parallel to the second sidewall.

Optionally, the lower part of the corner pillar is provided with a corner pillar communication hole, and the axial direction of the corner pillar communication hole is parallel to the first side wall.

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 schematic view of a prior art folding pallet box in a folded configuration;

FIG. 2 is a schematic diagram of the structure of a folding tray box according to a first preferred embodiment of the present invention in an assembled state;

FIG. 3 is a schematic structural view of the folding tray box of FIG. 2 in a folded condition;

FIG. 4 is a schematic diagram of a folding tray box according to a second preferred embodiment of the present invention in an assembled state;

FIG. 5 is a schematic view of the folding tray case of FIG. 4 in a folded configuration;

FIG. 6 is a schematic diagram of a third preferred embodiment of a folding tray case according to the present invention in an assembled state;

FIG. 7 is a schematic structural view of the folding tray box of FIG. 6 in a folded condition;

FIG. 8 is a perspective view of the collapsible pallet compartment of FIG. 2 in an assembled state;

FIG. 9 is an exploded isometric view of the folding pallet box of FIG. 2;

fig. 10 is a partial schematic view of the manner in which the end walls of the folding tray box are connected to the chassis according to the present invention;

FIG. 11 is an enlarged fragmentary view of the manner in which the end walls of the folding tray box of FIG. 10 are connected to the chassis at M;

fig. 12 is an enlarged partial view of the corner posts of the folding tray box of fig. 9 at E connected to the end walls;

fig. 13 is a partial schematic view of the connection of the first side wall of the folding tray box to the base tray according to the present invention;

FIG. 14 is an enlarged partial view of the side wall shaft attachment means at one end of the first side wall of the folding tray box of FIG. 9 at N;

FIG. 15 is an enlarged fragmentary view of the manner in which one end of the first side wall of the folding tray box is connected to the chassis at O of FIG. 13;

FIG. 16 is an enlarged fragmentary view of the side wall shaft attachment means at the other end of the first side wall of the folding tray box of FIG. 9 at P;

fig. 17 is an enlarged partial view of the manner in which the other end of the first side wall of the folding tray box of fig. 13 at Q is connected to the chassis;

fig. 18 is a partial schematic view of the upper lid axle attachment of the folding tray box according to a preferred embodiment of the present invention;

fig. 19 is a partial schematic view of a cover pivot attachment for a folding tray box according to another preferred embodiment of the present invention;

fig. 20 is a partial schematic view of a cover pivot attachment according to yet another preferred embodiment of the folding tray box of the present invention;

fig. 21-27 are schematic views of a folding process of a folding tray box according to a first preferred embodiment of the present invention;

fig. 28 is a perspective view of the folding tray box according to the first preferred embodiment of the present invention in a folded state;

fig. 29 is a schematic exploded perspective view of a two-fold type pallet box according to a preferred embodiment of the present invention;

FIG. 30 is an enlarged fragmentary view of the first sidewall riser at U of FIG. 29;

FIG. 31 is an enlarged fragmentary view of the corner post of FIG. 29 at S;

FIG. 32 is an enlarged partial view of the end of the connecting rod at R in FIG. 29;

FIG. 33 is a partially enlarged view of the connection of the connecting bar of the two continuous folding type tray box with the first sidewall posts according to the preferred embodiment of the present invention;

FIG. 34 is a schematic view of the two-fold foldable pallet box of FIG. 29 in an assembled state; and

fig. 35 is a schematic view of the two-fold foldable tray box of fig. 29 in a folded state.

Reference numerals:

100/200/300: folding tray box 110/210/310: chassis

111/211/311: corner post 1112: corner upright post intercommunicating pore

112: first skirt 113: second skirt

120: end wall 121: end wall pivot shaft

1211: long hole 1211 a: opening of the container

122: half-folding door 130/230/330: first side wall

131: sidewall shaft connecting means 1311 a: side wall articulated shaft

1311 b: first casting 1312 a: threaded hole on side wall

1312 b: second casting 1313: side wall bolt

1313 a: first threaded rod 1313 b: first polished rod

1314: sidewall hinge hole 132: first side wall column

1321: first communication hole 140/240/340: second side wall

142: second sidewall post 1421: second communication hole

150/250/350: first upper cover 150A: first surface

150B: second surface 151: upper cover shaft connecting device

1511: first hinge seat 1511 a: upper cover articulated shaft

1512: second hinge base 1512 a: upper cover nut

1513: upper cover bolts 1513 a: second threaded rod

1513 b: second polished rod 1514: hinge hole of upper cover

1515: third hinge seat 1515 a: base body

152: first open-close end 153: first pivot end

154: first support limiting plate 155: first side beam

156: third edge beam 160/260/360: second upper cover

162: second open-close end 163: second supporting limiting plate

164: upper cover handle 165: second side beam

170: t-shaped hole 171: sidewall connection assembly

172: chassis connection assembly 180: connecting rod

181: t-shaped hanging joint 190: lock set

191: the locking hole 351: first upper cover pivot

400: two-link pallet 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.

In the following description, a detailed structure will be presented for a thorough understanding of embodiments of the invention. It is apparent that the implementation of the embodiments of the present invention is not limited to the specific details familiar to those skilled in the art. It should be noted that ordinal numbers such as "first" and "second" are used in the invention only for identification and do not have any other meanings, such as a specific order. Also, for example, the term "first component" does not itself imply the presence of "second component", and the term "second component" does not itself imply the presence of "first component". The terms "upper", "lower", "front", "rear", "left", "right" and the like as used herein are for purposes of illustration only and are not limiting.

A preferred embodiment according to the present invention will be described in detail with reference to fig. 2 to 35.

Referring to fig. 2, 3, 8 and 9, there is shown the structure of a folding tray box 100 according to a first preferred embodiment of the present invention. The folding tray box 100 includes a bottom tray 110, end walls 120 oppositely disposed at both ends of the bottom tray 110, and a first side wall 130 and a second side wall 140 oppositely disposed at both sides of the bottom tray 110. A first upper cover 150 is pivotably connected to the top end of the first side wall 130 by an upper cover shaft coupling means 151, and a second upper cover 160 is pivotably connected to the top end of the second side wall 140 by an upper cover shaft coupling means 151. The four corners of the chassis 110 are respectively provided with angular pillars 111. The first and

second side walls

130 and 140 are pivotally connected to the corner posts 111 by side wall shaft connecting means 131 between a folded state folded onto the chassis 110 and a vertically erected state, and the end walls 120 at both ends are pivotally connected to the corner posts 111 by end wall pivot shafts 121 between a folded state folded onto the chassis 110 and an erected state.

The two end walls 120, the first side wall 130 and the second side wall 140 can be connected and fixed by a lock 190 in an assembled state. At this time, the first upper cover 150 is pivotable about a first upper cover pivot axis, that is, an axis of the upper cover shaft coupling means 151 coupled to the first upper cover 150, between a closed position covering the opening of the folding tray box 100 and an open position located outside the first side wall 130. Likewise, the second upper cover 160 is pivotable about a second upper cover pivot axis, i.e., the axis of the upper cover axle connection 151 associated with the second upper cover 160, between a closed position covering the opening of the folding tray box 100 and an open position located outside of the second side wall 140. When the first and second upper covers 150 and 160 are in the closed position, the first and

second side walls

130 and 140, the two end walls 120, the first and second upper covers 150 and 160, and the chassis 110 together form an inner receiving space capable of loading goods for shipping the corresponding goods.

Referring to fig. 2, according to the folding tray box 100 of the present invention, the sidewall shaft coupling means 131 coupled to the first sidewall 130 is positioned at a lower height than the sidewall shaft coupling means 131 coupled to the second sidewall 140. In the folding process, the first side wall 130 is folded first, and then the second side wall 140 is folded, so that when the folding tray box 100 is in the folded state, the first upper cover 150 is stacked on the outer surface of the first side wall 130, and the second side wall 140 and the second upper cover 160 are both located on the first surface 150A of the first upper cover 150, as shown in fig. 3 in detail. After folding in this way, a small gap X, typically 2 to 3mm, exists between the inner surface of the second sidewall 140 and the inner surface of the second cover 160 in the height direction of the folding tray box 100, and the influence on the folding height can be ignored. Therefore, the folding height of the foldable tray box 100 includes the thickness of the first side wall 130, the thickness of the first upper cover 150 and the thickness of the second side wall 140, and the thickness of the second upper cover 160 does not occupy the folding height any more, so that the folding height of the foldable tray box 100 can be effectively reduced, the transportation amount of the empty box during transportation can be increased, and the transportation cost can be reduced.

It should be noted that the directional terms "outside" and "inside" are directions determined based on the folding tray box 100 in the assembled state, the "outside" is the outside side of the folding tray box 100, and the "inside" is the inside side of the folding tray box 100. The first surface 150A of the first cover 150 is an inner surface of the first cover 150 when the foldable tray box 100 is in the erected state, and the second surface 150B of the first cover 150 is an outer surface of the first cover 150 when the foldable tray box 100 is in the erected state.

In order to realize the folding manner, it is necessary to design the dimensions of the folding tray box 100 appropriately. Referring to fig. 2 and 3, assuming that the horizontal distance between the centers of the two sidewall shaft connecting means 131 connected to the first sidewall 130 and the second sidewall 140 is a, the horizontal distance between the center of the sidewall shaft connecting means 131 and the inner side surface of the corner post 111 is B, the vertical distance between the second sidewall pivot axis and the first sidewall pivot axis is C, that is, the vertical distance between the center of the sidewall shaft connecting means 131 connected to the second sidewall 140 and the center of the sidewall shaft connecting means 131 connected to the first sidewall 130 is C, the vertical distance between the center of the sidewall shaft connecting means 131 connected to the first sidewall 130 and the center of the upper cover shaft connecting means 151 is D, the horizontal distance between the center of the upper cover shaft connecting means 151 and the inner side surface of the corner post 111 in the assembled state is F, that is, the horizontal distance between the first upper cover pivot axis and the inner side surface of the corner post 111 connected to the first upper cover 150 in the assembled state is F, the horizontal distance between the second upper cover pivot axis and the inner side surface of the corner post 111 connected to the second upper cover 160 is F, the horizontal distance between the inner side surface of the first upper cover 150 and the center of the upper cover shaft connecting means 151 connected thereto is G, the horizontal distance between the inner side surface of the second upper cover 160 and the center of the upper cover shaft connecting means 151 connected thereto is H, the horizontal distance between the inner side surface of the first upper cover 150 and the inner side surface of the second upper cover 160 is J, the horizontal distance between the inner side surface of the first upper cover 150 and the inner side surface of the adjacent corner post 111 in the folded state is K, and preferably, the horizontal distance between the inner side surface of the second upper cover 160 and the inner side surface of the adjacent corner post 111 is also K, that is, in the folded state, the inner side surface of the first upper cover 150 is flush with the inner side surface of the second upper cover 160. From FIG. 2, the relation (1) can be obtained: a ═ G + J + H-2F +2B, the relationship (2) can be obtained from fig. 3: a ═ B + K + H + D-C and relation (3): d ═ B + K + G, and combining the three relationships above yields relationship (4): C-2F + 2K-J.

Referring to fig. 2, it can be seen that the length of the folding tray box 100 depends on a and the height of the folding tray box 100 depends on D, and it can be seen from the relation (4) that whether the above-mentioned folding manner of the folding tray box 100 according to the present invention can be implemented is independent of a and D, i.e., the variation of the length and height of the folding tray box 100 does not affect the implementation of the above-mentioned folding manner. That is, the first side wall 130 is folded first and the second side wall 140 is folded later under the condition that the first side wall 130 is not interfered with the corner post 111 at the opposite side of the first side wall 130 after being folded, so that the first upper cover 150 is folded to the outer surface of the first side wall 130 when the folding type tray box 100 is in the folded state, and the folding manner that the second side wall 140 and the second upper cover 160 are both positioned on the first surface 150A of the first upper cover 150 is suitable for the folding type tray boxes 100 of various sizes satisfying the relation (4).

In the folded state, a certain gap should be left between the first and

second covers

150 and 160 and the inner side of the adjacent corner post 111 to avoid interference between the first and

second covers

150 and 160 and the corner post 111 during the folding process. That is, in the folded state, the horizontal distance K between the inner side surface of the first upper cover 150 and the inner side surface of the second upper cover 160 and the inner side surface of the adjacent corner post 111 should satisfy: k is more than 0. Combining relation (4) again to obtain relation (5): c + J > 2F. It can be understood that the foldable tray box 100 satisfying the relation (5) among the vertical distance C between the second side wall pivot axis and the first side wall pivot axis, the horizontal distance F between the first upper cover pivot axis and the inner side surface of the corner post 111 connected to the first upper cover 150 in the assembled state, the horizontal distance F between the second upper cover pivot axis and the inner side surface of the corner post 111 connected to the second upper cover 160, and the horizontal distance J between the inner side surface of the first upper cover 150 and the inner side surface of the second upper cover 160 can achieve the purpose of effectively reducing the folding height by the folding manner described above, regardless of the external dimensions of the foldable tray box 100.

In the assembled state, the top surfaces of the first and

second sidewalls

130 and 140 should be located in the same horizontal plane. The height dimension of the first side wall 130 is larger because the position of the pivot axis of the first side wall 130 is lower, that is, the position of the side wall shaft connecting means 131 connected with the first side wall 130 is lower. In the folded state, the length dimension of the first upper cover 150 is correspondingly large. Since the position of the pivot axis of the second sidewall 140 is high, that is, the position of the sidewall shaft connecting means 131 connected to the second sidewall 140 is high, the height dimension of the second sidewall 140 is small. In the folded state, the second side wall 140 and the second cover 160 lie flat and generally in the same plane, and therefore the sum of the height dimension of the second side wall 140 and the length dimension of the second cover 160 approximately matches the length (direction parallel to the end wall 120 or direction of dimension a) dimension of the folding tray bin 100. In the case where the length dimension of the folding tray box 100 is determined, the smaller the height dimension of the second side wall 140 is, the larger the length dimension of the second upper cover 160 may be. Therefore, the folding manner of the first side wall 130 and the first top cover 150, and the second side wall 140 and the second top cover 160 being unfolded and laid flat, can make the length of the first top cover 150 and the second top cover 160 as large as possible, so as to ensure that the top opening of the folding tray box 100 can be completely covered by the first top cover 150 and the second top cover 160 when the folding tray box 100 is in the assembled state.

In contrast, if the first side wall 130 and the first upper cover 150 are unfolded and laid flat and the second side wall 140 and the second upper cover 160 are stacked, the height dimension of the first side wall 130 is larger due to the lower position of the pivot axis of the first side wall 130, and the length dimension of the first upper cover 150 is smaller (compared with the length dimension of the second upper cover 160 folded and laid flat with the second side wall 140). Likewise, since the position of the pivot axis of the second sidewall 140 is higher and the height dimension of the second sidewall 140 is smaller, the length dimension of the second cover 160 is smaller (compared to the length dimension of the first cover 150 stacked in the aforementioned folding manner and the first sidewall 130). At this time, when the foldable tray box 100 is in the assembled state, the first upper cover 150 and the second upper cover 160 cannot completely cover the top end opening of the foldable tray box 100.

Further, referring to fig. 2 and 3, the relation (4) C is 2F +2K-J, which represents the size relationship of the foldable tray box 100 in the horizontal direction between the assembled state and the folded state, that is, the relation (4) is satisfied, so that the foldable tray box 100 can ensure a reasonable J gap in the assembled state, and ensure a reasonable K gap in the folded state, so that the size relationship of the foldable tray box 100 in the horizontal direction can be assembled and folded. Referring to fig. 3, it can be seen that in order to minimize the fold height, C needs to be minimized. In the relation (4) C ═ 2F +2K-J, K and J are fit clearances, and are generally 3 to 5 mm. When K and J take a certain value, the size of C is mainly determined by F. Therefore, to obtain a smaller C, it is desirable to minimize F. The size of F is related to whether there is sufficient space to accommodate the first top cover 150 in the vertical direction and whether the second side wall 140 and the second top cover 160 interfere with the first top cover 150 when the folding tray box 100 is in the folded state.

With continued reference to fig. 3, when the folding tray box 100 is in the folded state, it is assumed that a vertical distance between the center of the upper cover shaft coupling means 151 and the first surface 150A of the first upper cover 150 is Y, and a vertical distance between the center of the upper cover shaft coupling means 151 and the inner surface of the second upper cover 160 is Y. When the folding tray box 100 is in the assembled state, the inner surfaces of the side walls are generally flush with the inner side surfaces of the corner posts 111, and therefore, the distance between the center of the upper cover shaft connecting device 151 and the inner surfaces of the side walls is also F, i.e., the distance between the center of the upper cover shaft connecting device 151 and the inner surfaces of the first side wall 130 and the second side wall 140 is F, as shown in fig. 2. Assuming that the thickness of the first and

second sidewalls

130 and 140 is W, the thickness of the first and

second covers

150 and 160 is V. From fig. 3, the relation (6) can be derived: c + W ═ F + Y + W-F, and relationship (7): and Y is W-F + V. The relation (8) can be obtained by combining the relation (4), the relation (6) and the relation (7): v is 2F-W + K-J/2. It can be seen from relation (8) that, under the condition that the values of K and J are fixed and the thickness W of the side wall is not changed, reducing F reduces the thickness V of the upper cover, otherwise under the folded state, the first upper cover 150 and the second upper cover 160 will interfere in the vertical direction, and therefore the value of F cannot be reduced at will.

Since J/2 is not less than 0, the relation (9) can be obtained by combining the relation (8) again: v is less than or equal to 2F-W + K. When F is 0.5W, V is less than or equal to K, and the upper cover is thin and cannot meet the strength requirement. Since F < W, 2F-W < W, and since K is small, the influence can be ignored, and therefore V < W can be obtained by analyzing the relation (9), namely the thickness of the upper cover is smaller than that of the side wall. That is, on the premise of satisfying the relation (5) C + J > 2F to ensure the reasonable size relation of the foldable tray box 100 in the horizontal direction between the assembled state and the folded state, the thickness of the upper cover and the center position of the upper cover shaft connecting device 151 need to be designed reasonably, so that F is selected as a reasonable value in the range of 0.5W < F < W, i.e., the value of F is greater than half of the thickness W of the side wall, and V < W, i.e., the thickness V of the upper cover is smaller than the thickness W of the side wall, thereby ensuring that the foldable tray box 100 can effectively reduce the folding height and the size relation in the vertical direction is reasonable, i.e., there is enough space in the vertical direction to accommodate the first upper cover 150, and avoiding the interference between the second side wall 140 and the second upper cover 160 and the first upper cover 150.

In addition, referring to fig. 3 and 22, since the first upper cover 150 is required to be turned over to the outer surface of the first sidewall 130 in the folded state, and the first upper cover 150 and the second upper cover 160 are also required to be turned over to the outer surfaces of the first sidewall 130 and the second sidewall 140 in the assembled state when opened, respectively, the distance between the center of the upper cover shaft connecting device 151 and the outer surface of the sidewall connected thereto cannot be too large, i.e., the F-dimension cannot be too small, otherwise, when the second sidewall 140 and the second upper cover 160 are unfolded and laid flat on the first surface 150A of the first upper cover 150 in the folded state, the second sidewall 140 and the second upper cover 160 will not be on the same plane, i.e., the second upper cover 160 is deviated downward relative to the second sidewall 140, which will reduce the accommodation space of the first upper cover 150 in the folded state, and force the designed thickness of the first upper cover 150 to be very small.

Referring to fig. 4 and 5, which illustrate a folding tray box 200 according to a second preferred embodiment of the present invention, the folding tray box 200 is different from the folding tray box 100 of the first embodiment in that the height-to-length ratio of the folding tray box 200 is larger. The folding tray box 200 of this form, as further described in connection with fig. 2 and 3, also effectively reduces the folding height by the folding means described above.

The folding tray box 200 shown in fig. 4 and 5 can be obtained by reducing the length of the folding tray box 100 shown in fig. 2 and 3 without changing the height thereof. At this time, H and A are simultaneously reduced by the same value, and the other dimensions are not changed, so that the assembly state and the folding state of the folding tray box 200 can be ensured.

The folding tray box 200 shown in fig. 4 and 5 can also be obtained by increasing the height without changing the length of the folding tray box 100 shown in fig. 2 and 3. For example, the height of the folding tray box 100 is increased by L, and referring to fig. 3, the height dimension D of the first side wall 130 of the folding tray box 100 is increased by L, and the length dimension G of the first upper cover 150 is also increased by L; the height dimension D-C of the second sidewall 140 is increased by L, and the length dimension H of the second cover 160 is correspondingly decreased by L. Referring to fig. 2, it is also matched that the height dimension of the first and

second sidewalls

130 and 140 is simultaneously increased by L, the length dimension G of the first upper cover is increased by L, and the length dimension H of the second upper cover is correspondingly decreased by L. That is, the assembled state and the folded state of the folding tray box 200 having a larger height-to-length ratio obtained in this way can be surely achieved.

Referring to fig. 6 and 7, which illustrate a folding tray box 300 according to a third preferred embodiment of the present invention, the folding tray box 300 is different from the folding tray box 100 of the first embodiment in that the height of the folding tray box 300 is relatively small.

As can be understood from fig. 7, in the folded state, when the center of the first upper cover pivot 351 of the first upper cover 350 is located at the center of the chassis 310, the gap between the first upper cover 350 and the adjacent corner upright 311 is equal whether the first upper cover 350 is folded to the outer surface of the first side wall 330 or unfolded in the same plane as the first side wall 330. That is, in this case, the first upper cover 350 may be folded to the outer surface of the first sidewall 330 or unfolded in the same plane as the first sidewall 330. When the first top cover 350 is folded in a manner that the first side wall 330 is unfolded in the same plane, the folding height of the folding tray case 300 is smaller.

In the folded state, when the center of the first upper cover pivot axis 351 of the first upper cover 350 does not reach the center position of the chassis 310, the folding type tray box 300 may adopt a folding manner in which the first upper cover 350 is unfolded in the same plane as the first side wall 330.

In the folded state, when the center of the first upper cover pivot axis 351 of the first upper cover 350 exceeds the center position of the chassis 310, the first upper cover 350 can be folded only in such a manner as to be folded to the outer surface of the first side wall 330 to reduce the folded height of the folding tray case 300, which would otherwise cause an increase in the gap J.

The manner of connection between the various components of the folding tray box 100 of the present invention will now be described with reference to fig. 8-35.

Referring to fig. 9 to 12, two end walls 120 are oppositely disposed at both ends of the chassis 110, and are pivotably connected to the corner posts 111 at both ends of the chassis 110. Specifically, end wall pivot shafts 121 are respectively provided on both sides of the bottom of the end wall 120, and the end wall pivot shafts 121 may be connected to the bottom of the end wall 120 by welding, riveting, or the like. The corner posts 111 connected to the end walls 120 are provided with elongated holes 1211 for receiving the end wall pivot shafts 121, see in particular fig. 12. The slot 1211 is preferably designed to include an opening 1211a, the opening 1211a and the slot 1211 being arranged on adjacent sides of the corner post 111, wherein the opening 1211a is located on the side of the corner post 111 facing out of the folding tray box 100. The end wall pivot shaft 121 is fitted into the long hole 1211 from the opening 1211a, and is rotatable and movable up and down in the long hole 1211. Accordingly, the end wall 120 is rotatable with the end wall pivot shaft 121 in the elongated hole 1211 to effect pivoting between the erected state and the folded state. During folding, the two end walls 120 are folded out of sequence, and the folded end wall 120 can be adjusted in the folded position by moving the end wall pivot shaft 121 up and down in the long hole 1211, so that the end wall 120 folded back can be folded onto the end wall 120 folded first. The opening 1211a is designed to allow the end wall 120 to be quickly attached and detached, and is suitable for use in a case where the end wall 120 needs to be detached for loading and unloading.

Referring to fig. 9, the first and

second sidewalls

130 and 140 are oppositely disposed at both sides of the chassis 110 and are pivotably connected to the corner posts 111 at both sides of the chassis 110 by the sidewall shaft connecting means 131. The following description will be made by taking the connection mode of the first side wall 130 as an example.

Referring to fig. 9, 13 to 15, the sidewall shaft coupling means 131 includes a sidewall hinge shaft 1311a, and the sidewall hinge shaft 1311a is provided at one end of the bottom of the first sidewall 130. Specifically, a first casting 1311b is provided at one end of the bottom of the first sidewall 130, and the first casting 1311b may be welded, riveted, or the like to one end of the bottom of the first sidewall 130 to reinforce the strength of the first sidewall 130. The side wall hinge shaft 1311a is provided on the first casting 1311b, and may be connected to the first casting 1311b by welding, riveting, or the like, or may be constructed as one-piece with the first casting 1311 b.

Referring to fig. 9 and 16, the sidewall shaft coupling means 131 further includes a sidewall screw hole 1312a provided at the other end of the bottom of the first sidewall 130 and a sidewall bolt 1313 fitted into the sidewall screw hole 1312 a. Specifically, a second casting 1312b is provided at the other end of the bottom of the first sidewall 130, and a sidewall screw hole 1312a is provided in the second casting 1312 b. Sidewall bolt 1313 includes a first threaded rod 1313a and a first polished rod 1313b that mate with sidewall threaded hole 1312 a.

Referring to fig. 9, 15 and 17, the corner post 111 connected to the first sidewall 130 is provided with a sidewall hinge hole 1314 for receiving a sidewall hinge shaft 1311a and a sidewall bolt 1313. During the connection process of the first side wall 130 and the corner post 111, the first threaded rod 1313a is screwed into the side wall threaded hole 1312a, and the side wall hinge shaft 1311a and the first threaded rod 1313b are respectively installed into the corresponding side wall hinge holes 1314 on the corner post 111, so that the first side wall 130 can be pivotally connected to the corner post 111 to realize the pivoting between the assembled state and the folded state. The sidewall bolts 1313 are provided to hinge the other side of the first sidewall 130 to the corner post 111, so as to facilitate installation of the first sidewall 130 after galvanization, and avoid welding a burning-out zinc coating when the other side of the first sidewall 130 is installed to the corner post 111 by welding the sidewall hinge shaft 1311a after galvanization.

The mounting structure and function of the second side wall 140 and the corresponding corner column 111 are the same as those of the first side wall 130 and the corresponding corner column 111, except that the position of the hinge rotation center of the side wall shaft connecting device 131 connected with the first side wall 130 is relatively low, the height dimension of the corresponding first side wall 130 is large, the position of the hinge rotation center of the side wall shaft connecting device 131 connected with the second side wall 140 is high, and the height dimension of the corresponding second side wall 140 is small.

The design is such that the first side wall 130 and the second side wall 140 can be tilted outwardly at a small angle of 5 ° to 15 ° relative to the vertical during the erection and folding process to ensure that the first side wall 130 and the second side wall 140 do not topple over, which facilitates the continued operation of the erection and folding of the end wall 120 by a person.

Referring to fig. 9, the chassis 110 further includes a first skirt 112 at the bottom of the first sidewall 130 for supporting the first sidewall 130 and a second skirt 113 at the bottom of the second sidewall 140 for supporting the second sidewall 140.

With continued reference to fig. 9, the first upper cover 150 is pivotably connected to the top end of the first side wall 130 by an upper cover shaft connection 151, and the second upper cover 160 is pivotably connected to the top end of the second side wall 140 by an upper cover shaft connection 151.

The upper cover shaft connection means 151 includes an upper cover hinge shaft 1511a oppositely disposed at both sides of the pivoting end of the upper cover; and/or threaded holes and cover bolts 1513 that mate with the threaded holes. The connection between the first cover 150 and the first sidewall 130 will be described as an example. Referring to fig. 9 and 18, the upper cover shaft-connecting means 151 according to the preferred embodiment of the present invention includes an upper cover hinge shaft 1511a, and the first upper cover 150 includes a first pivoting end 153 with the upper cover hinge shaft 1511a disposed at both sides of the first pivoting end 153. Specifically, first hinge seats 1511 are provided at outer corners of both sides of the first pivoting end 153, and the first hinge seats 1511 may be welded, riveted, or the like to both sides of the first pivoting end 153. In the embodiment shown in fig. 18, a first hinge mount 1511 is attached to the upper and outer side surfaces of the third side rail 156. The upper cover hinge shaft 1511a is provided on the first hinge base 1511, and may be connected to the first hinge base 1511 by welding, riveting, or the like, or may be integrally formed with the first hinge base 1511.

Referring to fig. 19, the upper cover hinge shaft 1511a of at least one of both sides of the first pivoting end 153 may be replaced with a screw hole in a form to be fitted with the upper cover bolt 1513. Specifically, a second hinge seat 1512 is disposed at an outer corner of one side of the first pivot end 153, and in the illustrated embodiment, the second hinge seat 1512 is connected to an upper surface and an outer side surface of the third side beam 156. An upper cap nut 1512a is attached to the second hinge base 1512, such as by welding, to form a threaded aperture. The upper cover bolt 1513 includes a second threaded rod 1513a and a second polished rod 1513b that mate with the upper cover nut 1512 a.

In other embodiments, not shown, the threaded hole may be configured as an upper cover threaded hole directly machined at the second hinge base 1512 to mate with the second threaded shaft 1513a of the upper cover bolt 1513, instead of the upper cover nut 1512 a.

Referring to fig. 20, there is schematically shown an upper cover shaft coupling device 151 according to another preferred embodiment of the present invention. The difference from the above described preferred embodiment is the construction of the hinge seat. In the illustrated embodiment, the third hinge seats 1515 are disposed at two sides of the first pivot end 153, and the seat 1515a of the third hinge seat 1515 is connected to the second surface 150B of the first upper cover 150, the end surface and the side surface of the first side beam 155, and the end surface and the side surface of the third side beam 156, for example, by welding or riveting, so as to increase the connection contact surface sufficiently and enhance the connection strength effectively. Since the seat 1515a is connected to the second surface 150B of the first cover 150 and does not protrude from the first side beam 155 and the third side beam 156, the thickness of the seat 1515a can be increased to increase the strength of the third hinge seat 1515 without affecting the pivoting of the first cover 150.

An upper cover hinge shaft 1511a may be provided at an upper portion of the third hinge seat 1515 at both sides of the first pivoting end 153, or at least one side of the upper cover hinge shaft 1511a may be replaced in a form of a screw hole to be engaged with the upper cover bolt 1513. The threaded hole may be configured as an upper cover threaded hole (not shown) directly machined at the third hinge seat 1515, or as an upper cover nut 1512a coupled to the third hinge seat 1515.

With continued reference to fig. 9, the top ends of the first sidewall post 132 of the first sidewall 130 and the second sidewall post 142 of the second sidewall 140 are each provided with an upper cover hinge hole 1514 for receiving an upper cover hinge shaft 1511a and an upper cover bolt 1513. In one manner of connecting the first upper cover 150 to the first sidewall 130, the first upper cover 150 can be pivotally connected to the first sidewall 130 by tightening the second threaded rod 1513a to the upper cover nut 1512a or the upper cover threaded hole and installing the upper cover hinge axis 1511a and the second threaded rod 1513b into the corresponding upper cover hinge hole 1514 on the first sidewall upright 132, respectively, such that in the assembled state, the first upper cover 150 pivots between a closed position covering the opening of the folding tray box 100 and an open position located on the outer surface of the first sidewall 130. The upper cover bolt 1513 is arranged to realize the hinge joint of the first upper cover 150 and the first side wall 130, so as to facilitate the installation of the first upper cover 150 after galvanization, and avoid welding a burning zinc coating when the first upper cover 150 and the first side wall 130 are installed in a mode of welding an upper cover hinge shaft 1511a after galvanization.

Preferably, when the hinge seat is designed and installed, when the first upper cover 150 is located at the closed position, the distance between the axis of the upper cover hinge shaft 1511a and the second surface 150B of the first upper cover 150 is slightly greater than the distance between the axis of the upper cover hinge shaft 1511a and the outer surface of the first side wall 130, and the upper cover hinge shaft 1511a and the upper cover hinge hole 1514 are spaced with a suitable gap, so as to ensure that the second surface 150B of the first upper cover 150 is attached to the outer surface of the first side wall 130 when the first upper cover 150 is located at the open position. That is, when the first cover 150 is located at the open position, the first cover 150 is located on the outer surface of the first sidewall 130 and is parallel to the first sidewall 130.

The mounting structure and function of the second upper cover 160 and the second sidewall 140 are the same as the mounting structure and function of the first upper cover 150 and the first sidewall 130, and thus the description thereof is omitted.

Preferably, referring to fig. 9, the first upper cover 150 includes first support limit plates 154 disposed at both sides of the first upper cover 150, and the second upper cover 160 includes second support limit plates 163 disposed at both sides of the second upper cover 160. When the first and

second covers

150 and 160 are in the closed position, the first and second

support limit plates

154 and 163 overlap the top end of the end wall 120 to achieve the fixation of the first and

second covers

150 and 160.

In the illustrated embodiment, the first support stopper plates 154 are disposed at both sides of the first open/close end 152 of the first upper cover 150, and the second support stopper plates 163 are disposed at both sides of the second open/close end 162 of the second upper cover 160. It is understood that the specific arrangement positions of the first and second

support limit plates

154 and 163 may be adjusted as needed.

Preferably, the second support limit plate 163 includes a cover pull 164 extending toward the inside of the folding tray box 100 and beyond the second side beam 165 of the second cover 160 to facilitate opening of the second cover 160. Since the second upper cover 160 is small in size and light in weight, the opening operation by the upper cover handle 164 is facilitated. After the second cover 160 is opened, the third side member 156 of the first cover 150 can be grasped to open the first cover 150.

It is understood that an upper cover pull 164 may be provided on at least one of the first and second

support stopper plates

154 and 163 to conveniently open the first and second upper covers 150 and 160.

The folding process of the folding tray box 100 of the present invention will be described below with reference to fig. 21 to 28.

First, pull the second cover 160 by hand with the cover handle 164, refer to fig. 21;

second, the third side beam 156 of the inner side of the box of the first upper cover 150 is pulled by hand to open the first upper cover 150, refer to fig. 22;

third, the lock 190 is opened and the two end walls 120 are folded out of order, see fig. 23 and 24;

the fourth step, folding the first sidewall 130, the first upper cover 150 is folded with the first sidewall 130, refer to fig. 25;

the fifth step, folding the second sidewall 140, the second cover 160 is folded with the second sidewall 140, refer to fig. 26;

the sixth step is to unfold the second upper cover 160 to complete the folding operation, referring to fig. 27 and 28.

The assembly sequence and manner is the reverse of the folding process and is understood with reference to the folding process.

In a particular embodiment, the horizontal distance F between the first upper cover pivot axis and the inner side of the corner post 111 connected to the first upper cover 150 in the assembled state has a basic dimension of 15 mm. By designing the height difference between the support surface of the first skirt 112 supporting the first sidewall 130 and the support surface of the second skirt 113 supporting the second sidewall 140 of the chassis 110 so that the position of the support surface of the first skirt 112 is lower than the position of the support surface of the second skirt 113, the height difference is set to 34mm, and the height difference C between the center of the sidewall shaft connecting means 131 connected to the second sidewall 140 in the folded state and the center of the sidewall shaft connecting means 131 connected to the first sidewall 130 is 34mm at the same time. The basic dimension of the horizontal distance K from the first and

second covers

150 and 160 to the inner side face of the corner post 111 in the folded state is designed to be 4 mm. The basic size of the horizontal distance J from the inner side surface of the first upper cover 150 to the inner side surface of the second upper cover 160 in the assembled state is 4mm, and the basic size conforms to the relation (4): C2F +2K-J, i.e. 34 2 × 15+2 × 4-4. The folded height of the first sidewall 130 and the first upper cover 150 is 33 mm. The end wall pivot shaft 121 is movable in the long hole 1211 of the corner post 111, and the folded second side wall 140 is made flat with the second upper cover 160 by the position of the lower support surface of the first side wall 130, the position of the lower support surface of the second upper cover 160, the position of the support surface of the first skirt 112, and the position of the support surface of the second skirt 113 in cooperation with the adjacent members.

According to the folding tray box 100 of the present invention, since the end walls 120 are detachable, the folding tray box 100 with the detached end walls 120 can be connected together to form a multi-connected tray box to accommodate a wider variety of goods for transportation. A two-tray box 400 formed by connecting two folding tray boxes 100 will be described with reference to fig. 29 to 35.

Referring to fig. 29 and 30, in the present embodiment, the upper ends of the first side wall upright 132 of the first side wall 130 and the second side wall upright 142 of the second side wall 140 of the folding tray box 100 are each provided with a T-shaped hole 170, and the T-shaped holes 170 are located on the sides of the first side wall upright 132 and the second side wall upright 142 that face the inside of the box of the folding tray box 100. The upper end of the first sidewall upright 132 is provided with a first communication hole 1321, the axial direction of the first communication hole 1321 is parallel to the first sidewall 130, the upper end of the second sidewall upright 142 is provided with a second communication hole 1421, and the axial direction of the second communication hole 1421 is parallel to the second sidewall 140.

Referring to fig. 29 and 31, a lower portion of the corner post 111 is provided with a corner post communication hole 1112, and an axial direction of the corner post communication hole 1112 is parallel to the first side wall 130. In the illustrated embodiment, two upper and lower corner post communication holes 1112 are opened in the lower portion of the corner post 111. It will be appreciated that the specific number of corner post communication apertures 1112 may be set as desired.

When the two folding tray boxes 100 are connected, the faces with the removed end walls 120 are brought together and connected by the side wall connecting members 171, the bottom tray connecting members 172 and the connecting rods 180.

Specifically, the side wall coupling assembly 171 and the chassis coupling assembly 172 include bolts, nuts, and washers, and the bolts of the side wall coupling assembly 171 pass through the first communication holes 1321 and the second communication holes 1421 of the two folding tray boxes 100, and the bolts of the chassis coupling assembly 172 pass through the corner post communication holes 1112 of the two folding tray boxes 100 to couple the side walls of the two folding tray boxes 100 and the chassis 110 together. Washers with proper thickness are arranged between the side wall upright posts and the corner upright posts 111 of the two folding tray boxes 100 and are sleeved on the connecting bolts, so that the two folding tray boxes 100 can be tightly connected and kept in a correct state.

The two ends of the connecting rod 180 are respectively provided with two T-shaped hanging joints 181 which are matched with the T-shaped holes 170, specifically referring to fig. 32, the T-shaped hanging joints 181 are inserted into the sidewall columns from the upper ends of the two T-shaped holes 170 of the two opposite sidewalls of the two foldable tray boxes 100, then the connecting rod 180 falls, the T-shaped hanging joints 181 hang the lower ends of the T-shaped holes 170, specifically referring to fig. 33, thereby connecting the opposite sidewalls of the two foldable tray boxes 100 together, specifically referring to fig. 34, and preventing the sidewalls of the two tray boxes 400 from deforming in use. Such that two folding pallet boxes 100 can be assembled into one large two-in-one pallet box 400 to accommodate the transportation of a greater variety of goods.

When the upper covers of the two-link tray cases 400 are closed, the first upper cover 150 and the second upper cover 160 of the two folding tray cases 100 overlap at one side thereof the top ends of the end walls 120 and overlap at the other side thereof the link bars 180. The folding and erection of the side walls, end walls and top cover of the twin tray box 400 is substantially the same as that of the folding tray box 100. When the two-in-one tray box 400 is folded, the two end walls 120 are folded onto the bottom tray 110 without being stacked on each other, but are folded onto the bottom tray 110 together and positioned on the same plane. In addition, the connecting rod 180 is detached before folding, and the connecting rod 180 can be accommodated in the space between the two folded end walls 120.

Referring to fig. 9, one of the two end walls 120 is constructed in an integral structure, and the other end wall is constructed in a structure including a half-folding door 122, so that both the end walls 120 can be detached from the chassis 110, and the end wall 120 can be detached from the chassis 110 as needed to be loaded or unloaded, or only the half-folding door 122 can be opened to load or unload. Each of the first sidewall posts 132 and each of the second sidewall posts 142 have upper and lower locking holes 191 corresponding to the locking device 190, so that the end walls 120 of the two structures can be installed in an interchangeable position.

Likewise, referring to fig. 34, both end walls 120 of the tray case 400 may be constructed in a unitary structure, may be constructed in a structure including the half-folding door 122, and may be constructed in a structure in which one is constructed in a unitary structure and the other is constructed in a structure including the half-folding door 122, as necessary.

Unless defined otherwise, technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Terms such as "disposed" and the like, as used herein, may refer to one element being directly attached to another element or one element being attached to another element through intervening elements. Features described herein in one embodiment may be applied to another embodiment, either alone or in combination with other features, unless the feature is otherwise inapplicable or otherwise stated in the other embodiment.

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. It will be appreciated by those skilled in the art that many variations and modifications may be made to the teachings of the invention, which fall within the scope of the invention as claimed.

Claims

1. A folding tray bin, comprising:

the four corners of the chassis are provided with angular upright posts;

2. The folding tray box of claim 1, wherein the side wall has a thickness W, and the relationship between F and W satisfies: f is more than 0.5W and less than W.

3. The folding tray box of claim 1, wherein the thickness of the first cover is less than the thickness of the first side wall.

4. The folding tray box of claim 1, further comprising a sidewall pivot attachment, the first sidewall being pivotally attached to the corner post by the sidewall pivot attachment, the second sidewall being pivotally attached to the corner post by the sidewall pivot attachment, the sidewall pivot attachment including a sidewall hinge axis and a sidewall threaded aperture disposed opposite a bottom end of the sidewall, and a sidewall bolt mating with the sidewall threaded aperture.

5. The folding tray box of claim 4, wherein said corner posts connected to said side walls are provided with side wall hinge holes for receiving said side wall hinge axes and said side wall bolts.

6. The folding tray box of claim 1, further comprising an upper cover pivot connection, the first upper cover being pivotally connected to a top end of the first side wall by the upper cover pivot connection, the second upper cover being pivotally connected to a top end of the second side wall by the upper cover pivot connection.

7. The folding tray box of claim 6, wherein the upper cover pivot connection means comprises an upper cover hinge axis disposed opposite each side of the upper cover pivot end; and/or

The screw hole and with screw hole matched with upper cover bolt.

8. The folding tray box of claim 7, wherein top ends of the first and second side walls are each provided with a lid hinge hole for receiving the lid hinge shaft and the lid bolt.

9. The folding tray box of claim 1, further comprising end walls disposed opposite ends of the chassis, the end walls pivotally connecting the corner posts about end wall pivot axes.

10. The folding tray box of claim 9, wherein said corner posts associated with said end walls are provided with elongated holes for receiving said end wall pivot axes.

11. The folding tray box of claim 1, wherein the first upper cover includes first support limiting plates provided at both sides of the first upper cover, and the second upper cover includes second support limiting plates provided at both sides of the second upper cover.

12. The folding tray box of claim 1, wherein an upper end of each of the first sidewall upright of the first sidewall and the second sidewall upright of the second sidewall is provided with a T-shaped aperture on an inner side of the first sidewall upright and the second sidewall upright facing into the box of the folding tray box.

13. The folding tray box of claim 12, comprising a connecting bar having T-shaped hanging tabs at each end for mating with the T-shaped holes.

14. The folding tray box of claim 12, wherein the upper end of the first sidewall post is provided with a first communication hole having an axis direction parallel to the first sidewall, and the upper end of the second sidewall post is provided with a second communication hole having an axis direction parallel to the second sidewall.

15. The folding tray box of claim 1, wherein a lower portion of the corner post is provided with a corner post communication hole, an axial direction of which is parallel to the first side wall.