CN110641849A

CN110641849A - Tray box

Info

Publication number: CN110641849A
Application number: CN201810671842.8A
Authority: CN
Inventors: 苏继军; 刘春良; 倪建生; 李波; 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: Cimc Carrier Technology Co ltd; Dalian CIMC Logistics Equipment Co Ltd
Priority date: 2018-06-26
Filing date: 2018-06-26
Publication date: 2020-01-03

Abstract

The invention provides a pallet box comprising a rectangular base tray and a pallet wall. At least one tray wall is removable. Connecting shafts are arranged at two ends of the bottom of the detachable tray wall, an upright post with a connecting groove is arranged at the top point corresponding to the chassis, and the connecting shafts can move and can be rotatably accommodated in the connecting groove. At least one upright post connected with the wall of the detachable tray is provided with a notch communicated with the connecting groove on the outer side surface. The detachable tray wall can be tilted outward to a predetermined angle with respect to a vertical direction perpendicular to the chassis, in which state the notch is aligned with the connecting shaft in a tilt direction perpendicular to a thickness direction of the detachable tray wall, as viewed in an axial direction of the connecting shaft. According to the tray box, the detachable tray wall can be detached in a mode of inclining outwards and drawing upwards, the detachable tray wall always moves towards a direction far away from goods in the tray box in the detaching process, the detachable tray wall is not affected by the external expansion pressure of the goods, and the tray box is convenient to use.

Description

Tray box

Technical Field

The present invention relates generally to the field of container transportation, and more particularly to a pallet box.

Background

In the field of logistics transportation, a pallet box is generally used as a container for shipping goods to transport the goods. The tray box typically includes a base having opposed end walls and opposed side walls connected thereto. At least one pair of the end and the side wall is fixedly connected with the chassis in the vertical direction, and the other pair of the end and the side wall can be connected with the adjacent end and the side wall through the lock so as to be indirectly fixedly connected with the chassis in the vertical direction, so that the end, the side wall and the chassis are connected into a whole to form a container for storing and transporting goods.

In order to save space, increase transportation and storage volume, reduce logistics cost, there are generally two kinds of modes in the tray case when empty case transportation and storage: the first is to disassemble the tray box into parts such as end wall, side wall, chassis, etc., and then stack, transport and store, i.e. the disassembled tray box; the other is to fold the end walls and side walls onto the chassis for stacking, transportation and storage, i.e., folding tray cases. The detachable tray box and the foldable tray box respectively have advantages and disadvantages, and the detachable tray box has the advantages that: the structure is simple, the cost is low, and the unloading device is particularly suitable for products which need to be disassembled at the end and the side wall and are convenient to unload, such as synthetic rubber raw material blocks. The disadvantages are that: the disassembling and stacking operation is relatively inconvenient, and the components are easy to lose and damage. The folding tray box has the advantages that: the folding and stacking operation is convenient, and the components are not easy to lose and damage. The disadvantages are that: the structure is relatively complex, the cost is relatively high, and the unloading device is not suitable for the condition that the unloading is carried out after the end and the side wall are completely disassembled.

At present, synthetic rubber raw material blocks are transported and stored by adopting a detachable tray box. When unloading, the end and the side wall are firstly detached from the chassis, and then the rubber block is pushed away from the chassis. The unloading is convenient because the obstruction of the end and the side wall is avoided. However, as mentioned above, the knock-down pallet box has some disadvantages and is not well suited for shipping other products. If the foldable tray box is used for transporting and storing the synthetic rubber raw material blocks, although the defects of the detachable tray box can be overcome and the foldable tray box is more convenient to use when other products are shipped, the existing foldable tray box cannot be used for detaching the end and the side wall when goods are filled in the box or the opposite end and the side wall of the goods in the box have external expansion pressure, or cannot be used for completely detaching the end and the side wall. The synthetic rubber raw material block is not easily unloaded.

Therefore, there is a need to provide a pallet box that at least partially solves the above problems.

Disclosure of Invention

To at least partially solve the above problems, the present invention provides a tray case including:

the chassis is rectangular; and

the tray walls are four and are respectively arranged above the side edges of the chassis, and at least one of the tray walls is detachably connected with the chassis;

the top point of the chassis corresponding to the detachable tray wall is provided with an upright post, the inner end face of the upright post facing the detachable tray wall is provided with a connecting groove extending up and down, and at least one of the two upright posts connected with the detachable tray wall is provided with a notch which is communicated with the connecting groove and extends transversely on the outer side face intersected with the inner end face;

connecting shafts extending outwards along the length direction are respectively arranged at two ends of the bottom of the detachable tray wall, the connecting shafts can enter the connecting grooves through the gaps and can be movably accommodated in the connecting grooves, and the detachable tray wall can pivot around the connecting shafts;

the tray case is configured such that the detachable tray wall can be tilted outward to a predetermined angle with respect to a vertical direction perpendicular to the chassis, and in this state, the notch is aligned with the connecting shaft in a tilt direction perpendicular to a thickness direction of the detachable tray wall, as viewed in an axial direction of the connecting shaft.

Optionally, at least one pair of opposing outer side edges of the chassis are provided with upwardly extending blocking walls, the tray walls corresponding thereto abutting inner surfaces of the blocking walls when in the assembled state.

Optionally, the chassis includes a rectangular structure surrounded by four side beams, the upper surfaces of at least one pair of the side beams arranged oppositely are provided with grooves extending along the length direction, the bottoms of the tray walls corresponding to the grooves are accommodated in the grooves when the tray walls are in an assembled state, and the outer standing walls of the grooves are configured as the blocking walls.

Optionally, the inner side wall of the connecting groove forms a limiting inclined surface at the lower end, and the limiting inclined surface is configured to extend along the inclined direction; when the detachable tray wall is inclined outward with respect to the vertical direction to a state where the connecting shaft abuts against the limit inclined surface and the outer side surface of the detachable tray wall abuts against the upper edge of the blocking wall, the angle between the detachable tray wall and the vertical direction is the predetermined angle.

Optionally, a support block is disposed in the groove, the support block supporting the tray wall.

Optionally, the upper surface of the rectangular structure is provided with a bottom plate, and the upper edge of the outer side vertical wall of the groove is higher than the bottom plate.

Optionally, a reinforcing member is arranged in the middle of the groove, and the reinforcing member is respectively connected with the two vertical walls of the groove.

Optionally, the upright provided with the notch is provided with a blocking member at a position of the outer side surface close to the notch, the blocking member being configured to be movable between a covering position covering the notch and an opening position exposing the notch.

Optionally, two sides of the bottom of the detachable tray wall are provided with avoidance notches for avoiding the stand column, and the shape of the avoidance notches is adapted to the shape of the stand column.

Optionally, one of the avoiding notch and the upright column corresponding to the avoiding notch is provided with a protruding part, and the other is provided with a concave part matched with the protruding part.

Optionally, the pallet box includes a lock configured to detachably connect adjacent pallet walls.

Optionally, the sum of the length of the bottom of the detachable tray wall and the length of any one of the connecting shafts is greater than the distance between the inner end faces of the two columns on the two sides of the detachable tray wall.

Optionally, the sum of the length of the connecting shaft corresponding to the gap and the length of the bottom of the detachable tray wall is smaller than the sum of the distance between the inner end surfaces of the two columns on the two sides of the detachable tray wall and the horizontal extension distance of the gap.

Optionally, the predetermined angle is 10 ° to 45 °.

Optionally, the predetermined angle is 10 ° to 30 °.

The tray box provided by the invention is provided with the detachable tray wall, the detachable tray wall can be inclined outwards relative to the chassis by a preset angle and can be detached from the chassis in a mode of being pulled and pulled obliquely upwards in the state, and the detachable tray wall always moves towards the direction far away from goods in the tray box in the detaching process, so that the detachable tray box is not influenced by pressure generated by goods swelling and is convenient to use.

Drawings

The following drawings are included to provide a further understanding of the invention. In the drawings:

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

FIG. 2 is a schematic view of the chassis of the pallet box shown in FIG. 1;

FIG. 3 is a schematic view of a bottom end beam side of the chassis shown in FIG. 2;

FIG. 4 is a schematic view of an end wall of the tray box shown in FIG. 1;

FIG. 5 is a schematic view of a side of the underside beam of the chassis shown in FIG. 2;

FIG. 6 is a schematic view of a side wall of the pallet box shown in FIG. 1;

FIG. 7 is a schematic half-section view of the undercarriage shown in FIG. 2 in a direction perpendicular to the bottom end beam;

FIG. 8 is a schematic half-section view of the undercarriage shown in FIG. 2 in a direction perpendicular to the underside beam;

FIG. 9 is a schematic view of one side of an end wall of the tray box shown in FIG. 1;

FIG. 10 is an enlarged view of a portion A of FIG. 9;

FIG. 11 is a schematic view of the tray box of FIG. 1 with the end walls and side walls in a collapsed position;

FIG. 12 is a schematic view of the tray box of FIG. 1 with the end and side walls thereof tilted outwardly;

FIG. 13 is a partial perspective view of the end wall shown in FIG. 4;

FIG. 14 is a partial perspective view of the chassis shown in FIG. 2; and

fig. 15 and 16 are schematic views of the relative positions of the end walls of the tray box according to the present invention with respect to the chassis during disassembly and assembly.

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 the present invention may be practiced without one or more of these specific details. In other instances, well-known features have not been described in order to avoid obscuring the invention.

The invention provides a pallet box, which comprises a chassis and a pallet wall. The chassis is rectangular. The tray walls are four and are respectively arranged above the side edges of the chassis. The walls and the floor together enclose a space for accommodating goods. Wherein at least one tray wall is detachable with respect to the chassis. The detachable tray wall is configured to be capable of being tilted outward by a predetermined angle with respect to a vertical direction perpendicular to the chassis, and to be detachable from the chassis in such a manner as to be drawn obliquely upward along the tilt direction. From this, can dismantle the tray wall and move towards the direction of keeping away from tray incasement goods always dismantling the process to do not receive the influence of the bloated produced pressure of goods outward, facilitate the use.

The pallet box of the present invention will be described in detail with reference to the accompanying drawings.

As shown in fig. 1, the pallet box comprises a chassis 1, a pair of oppositely disposed end walls 2 and a pair of oppositely disposed side walls 3. The end wall 2 and the side wall 3 can be disposed vertically above the chassis 1, with the end wall 2 and the side wall 3 in an assembled state. The end walls 2, side walls 3 and the chassis 1 together enclose a space for accommodating goods.

Here the end wall 2 and the side wall 3 are both different embodiments of the tray wall. Wherein the length of the side walls 3 is greater than the length of the end walls 2. In other embodiments of the invention, the four tray walls may be provided with the same dimensions without distinguishing between the end walls and the side walls, in which case the tray is square. Since the end wall 2 and the side wall 3 are both tray walls and are similar in structure, in the following description, the end wall 2 will be taken as an example, and only the structural features of the side wall 3 will be described. However, it will be appreciated by those skilled in the art that the structural features of the end wall 2 and side wall 3 may be common or interchangeable.

Fig. 2 shows a detailed structure of the chassis 1, which is constructed in a rectangular structure formed by four side members. Wherein the four side beams include a pair of oppositely disposed bottom end beams 12 and a pair of oppositely disposed bottom end beams 13. The bottom end beam 12 and the bottom side beam 13 correspond to the end wall 2 and the side wall 3, respectively. Preferably, the upper surface of the rectangular structure is provided with a bottom plate 11. To facilitate loading and unloading of the goods, the upper surface of at least one pair of bottom end beams 12 and bottom side beams 13 should be flush with the upper surface of the bottom plate 11 or slightly lower than the upper surface of the bottom plate 11 to avoid obstacles when the goods are to be unloaded from the chassis 1. For example, in the present embodiment, the length of the side wall 3 is greater than the length of the end wall 2, that is, the length of the bottom side member 13 is greater than the length of the bottom end member 12. The cargo on the floor panel 11 is preferably unloaded from the position of the bottom side member 13, and therefore, at least the upper surface of the bottom side member 13 should be made flush with the upper surface of the floor panel 11. Four vertexes of the rectangular structure are respectively provided with four upright posts 14 extending upwards, and the end wall 2 and the side wall 3 are detachably connected with the chassis 1 through the upright posts 14.

In this embodiment, the four tray walls are each configured to be removably connected to the chassis. In yet other embodiments, one or more tray walls may be configured to be non-removably coupled to the chassis. The non-detachable tray wall can be connected with the chassis through the upright post, and can also be connected with the chassis through other modes, such as direct welding with the chassis and the like. In addition, adjacent tray walls may be connected to the same post at the same apex. The structure of the chassis is not limited to the above embodiment, and for example, in another embodiment, the chassis may be in the form of a rectangular structure formed by one integral plate.

Fig. 4 and 13 show the structure of the end wall 2. As shown in fig. 4, the end wall 2 is substantially rectangular. Both ends of the bottom 21 of the end wall 2 are provided with two connecting shafts 22 extending outwardly in the length direction. Accordingly, fig. 3, 7 and 14 show the structure of the bottom end beam 12 side of the chassis 1 corresponding to the end wall 2. As shown in fig. 7 and 14, an inner end surface 149 of the pillar 14 facing the end wall 2 is provided with a connecting groove 141 extending up and down. The connecting shaft 22 of the end wall 2 can be accommodated in the connecting groove 141 and can move up and down along the connecting groove 141. That is, the end wall 2 is pivotably connected to the upright 14 about the connecting shaft 22. Hereby it is achieved that the end wall 2 folds inwards or inclines outwards in relation to the chassis 1. Since the coupling grooves 141 extend up and down, the two opposite end walls 2 can be folded inward without being sequentially arranged, facilitating the folding operation. Fig. 11 shows the pallet box in a folded state, in which a pair of end walls 2 and a pair of side walls 3 are respectively folded on the chassis 1, so that the space occupied when the empty box is transported can be reduced. Fig. 12 shows the tray box with the end walls 2 and side walls 3 respectively inclined outwardly relative to the chassis 1, with the end walls 2 and side walls 3 being removable.

Referring again to fig. 3 and 14, the outer side 148 of the left upright 14 intersecting the inner end surface 149 is provided with a transversely extending notch 142, the notch 142 communicating with the attachment slot 141. Wherein, the position of the notch 142 is higher than the position of the bottom of the connecting groove 141. The connecting shaft 22 of the end wall 2 can enter into the connecting groove 141 through the notch 142 or escape from the connecting groove 141, thereby achieving the mounting or dismounting of the end wall 2 with respect to the chassis 1. It will be appreciated that since the connecting shaft 22 can enter through the opening of the connecting slot 141 in the inner end face 149 of the upright 14, the removal of the end wall 2 can be achieved by providing only one of the two uprights 14 connected to the end wall 2 with a notch 142. Of course, notches 142 may be provided in both columns 14.

The process of disassembling the end wall 2 will now be described. As shown in fig. 15, the end wall 2 is first inclined outward by a predetermined angle θ with respect to a vertical direction OM perpendicular to the chassis 1. At this time, the tray case is configured such that the connecting shaft 22 is aligned with the notch 142 in a direction perpendicular to the thickness direction of the end wall 2 as viewed in the axial direction of the connecting shaft 22. This direction may be referred to as an oblique direction, i.e., a direction on a plane perpendicular to the axial direction of the connecting shaft 22, which is parallel to the projection of the wall surface of the end wall 2 on this plane. By pulling the end wall 2 obliquely upward in the direction ON in this state, the connecting shaft 22 can be moved to the position of the notch 142, and the state in this case is shown in fig. 16. After the connecting shaft 22 enters the notch 142, the end wall 2 can be moved in any direction within the range of the included angle between the direction ON and the horizontal direction OP, so that the connecting shaft 22 is disengaged from the notch 142, and the detachment of the end wall 2 is completed.

Wherein the predetermined angle θ may range from 10 ° to 45 °. When θ is smaller than 10 °, the end wall 2 is inclined at a small angle in disassembly, and approaches a vertical state. Whereas the end wall 2 is vertical in operation and is not intended to be removed in operation. Therefore, the angle is too small, which easily causes the end wall 2 to easily transition from the vertical state at the time of operation to the inclined state at the time of detachment, and there is a risk of erroneous detachment. And when θ is larger than 45 °, the end wall 2 is too inclined outward at the time of disassembly, and the worker is inconvenient to operate. Preferably, the range may be 10 ° to 30 °. In this way, the worker can operate the end wall 2 for removal and installation in a comfortable position. In one embodiment, θ may take on a value of 13 °, 17 °, 24 °, or 35 °.

During the disassembly process, when the connecting shaft 22 is located in the connecting groove 141, the connecting shaft 22 moves obliquely upward, that is, the connecting shaft 22 moves laterally outward while moving upward. At this time, if the pallet box is loaded with goods such as synthetic rubber raw material blocks which are easy to generate outward expansion pressure on the pallet wall, the connecting shaft 22 is transversely and gradually far away from the goods, that is, the pallet wall (end wall 2) is transversely and gradually far away from the goods, so that the influence of the outward expansion pressure generated by the goods on the pallet wall can be reduced, the friction force between the goods and the pallet wall is reduced, and the dismounting process of the pallet wall is simplified.

The process of installation of the tray wall may be reversed from the above-described process of removal. However, when no goods on the chassis block the tray wall, the connecting shaft can enter the connecting groove through the notch in a manner that the tray wall is in other postures to complete the installation, for example, the tray wall is in a vertical state. In addition, in the dismounting process, when goods in the tray box do not generate outward expansion pressure or the outward expansion pressure is small, the tray wall can be directly lifted upwards to enable the connecting shaft to align with the notch, so that dismounting is completed. Of course, the connecting shaft is easy to slide from the notch to enter the upper end of the connecting groove in the disassembling mode, the connecting shaft is not easy to align with the notch, and the disassembling is not more convenient as the tray wall is inclined outwards. And the upward lifting and dismounting mode is only suitable for the tray wall which is not in limited connection with the chassis in the vertical direction. And the mode of outwards inclining the dismantlement can make the tray wall break away from and accomplish the dismantlement with the spacing connection of chassis in the vertical direction, and the adaptability is better.

Preferably, as shown in fig. 3 and 10, on an outer side 148 of the upright 14, there is further provided a blocking member 143 configured to be movable between a covering position covering the notch 142 and an open position exposing the notch 142. The blocking member 143 prevents the connecting shaft 22 from coming out of the notch 142 in a normal use state, and prevents the end wall 2 from being undesirably detached from the chassis 1.

As shown in fig. 4, the sum of the length of the connecting shaft 22 corresponding to the gap 142 and the length of the bottom 21 of the end wall 2 is a1, which should be smaller than the sum B2 of the distance B1 between the horizontal extension of the gap 142 and the inner end faces 149 of the two uprights 14 shown in fig. 3. This ensures that when only one notch 142 is provided, the right side of the bottom 21 of the end wall 2 abuts against the inner end surface 149 of the right pillar 14, and the connecting shaft 22 can smoothly pass through the notch 142 without being blocked, thereby ensuring that the end wall 2 can be smoothly disassembled and assembled. In addition, the sum of the length of any connecting shaft 22 and the length of the bottom 21 of the end wall 2 should preferably be greater than B1. For example, a1 should be greater than B1. This prevents the end wall 2 from moving relative to the chassis 1 along the length of the base 21, which would cause the connecting shaft 22 to come out of the opening of the connecting slot 141 at the inner end face 149 of the upright 14.

In order to connect the components of the pallet box tightly and reduce the gap, as shown in fig. 4, the bottom 21 of the end wall 2 is provided with relief notches 23 on both sides for relieving the upright posts 14. In this way, when the end wall 2 is attached to the chassis 1, the upright 14 is located at the escape notch 23, and the portion above the escape notch 23 is adjacent to the adjacent side wall 3. Thereby making the accommodating space of the tray box tighter.

Preferably, as shown in fig. 3 and 4, on the vertical side of the avoidance gap 23, a first recess 231 extending horizontally is provided, and on the column 14, at a position corresponding to the first recess 231, a first protrusion 144 extending horizontally is provided. As further shown in fig. 9 and 10, when the end wall 2 is attached to the chassis 1, the first projection 144 extends into the first recess 231. With this arrangement, the end wall 2 can be prevented from moving upward.

In addition, as shown in fig. 3 and 4, it is preferable that a second protrusion 232 extending vertically downward is provided on the top lateral side of the escape notch 23, and a second recess 145 extending vertically is provided on the pillar 14 at a position corresponding to the second protrusion 232. As further shown in fig. 9 and 10, when the end wall 2 is attached to the chassis 1, the second protrusion 232 extends into the second recess 145. Therefore, the upright post 14 can be corrected by the matching between the second protruding part 232 and the second concave part 145, and the vertical gap between the upright post 14 and the end wall 2 is prevented from being enlarged due to outward inclined deformation of the upright post 14 caused by upward bending and arching of the bottom end beam 12 in the production and use processes.

The first and

second recesses

231 and 145 are opened in the horizontal direction inside and outside the tray case. In this way, the connection of the end wall 2 to the chassis 1 in the vertical and horizontal direction is achieved when the end wall 2 is in the vertical position. When the end wall 2 is in the position inclined outward of the tank, the first projecting portion 144 and the first recessed portion 231, and the second projecting portion 232 and the second recessed portion 145 can be respectively and easily disconnected without affecting the inclination of the end wall 2 outward of the tank, thereby avoiding interference with the detachment of the end wall 2.

It is to be understood that the specific arrangement positions of the above-described structures (the first recess and the first protrusion, the second recess and the second protrusion) that are fitted to each other are not limited to those shown in the present embodiment, as long as the fitting can be achieved. For example, the first recess 231 may be disposed at any suitable position on the pillar 14 corresponding to the end wall 2, and the first protrusion 144 is disposed at a corresponding position on the vertical side of the relief notch 23 of the end wall 2.

As shown in fig. 4, the end wall 2 is provided with a lock 4. The lock 4 serves to connect the adjacent end walls 2 and side walls 3 together when the pallet box is erected. When the end wall 2 cannot move upwards, the side wall 3 cannot move upwards because it is rigidly connected to the end wall 2 by means of the lock 4. Therefore, it is only necessary to provide the engagement structure for preventing the upward movement on the end wall 2 and the corresponding pillar 14, and it is not necessary to provide the same structure on the side wall 3, so that the production cost can be reduced.

In this embodiment the bottom end beam 13 is longer than the bottom end beam 12, preferably for unloading the goods on the floor 11 from the position of the bottom end beam 13. Therefore, the bottom side member 13 is subjected to a large force during use. The bottom side beam 13 adopts an upper and lower double-layer beam structure, so that the strength and rigidity are ensured, and the deformation is prevented. And bottom end roof beam 12 adopts single roof beam structure, alleviates the weight of tray case on the basis of guaranteeing intensity to the operation of manual hydraulic pressure carrier is adapted to. Since the bottom side member 13 has a greater strength, as shown in fig. 6, a stacking block 34 is provided at the top end of the side wall 3. In the assembled condition, the stacking blocks 34 are higher than the top end of the end wall 2. When the pallet boxes are stacked in an assembled state, the chassis of the upper pallet box is placed on the stacking block 34, the weight is directly transmitted to the bottom side beams 13 through the side walls 3, and then the weight of the upper pallet box is dispersed to other parts of the chassis 1 of the lower pallet box through rigid connection between the parts.

Preferably, as shown in fig. 5 and 6, the top transverse side of the escape notch 33 of the side wall 3 is provided with a vertically extending third recess 331, and the top of the upright post 14 corresponding to the side wall 3 is provided with a third protrusion 146. When the side wall 3 is mounted to the chassis 1 in an assembled state, the third protrusion 146 extends into the third recess 331 and abuts against the top surface of the third recess 331. Therefore, the pillar 14 can bear a part of the weight of the upper-layer pallet box by the side wall 3 at the time of stacking, and the burden on the bottom side member 13 can be reduced. Similarly, the third recess 331 opens in the horizontal direction inside and outside the tray case. Such a structure does not affect the inclination of the side wall 3 to the outside of the tank, and prevents interference with the detachment of the side wall 3. Of course. A protrusion may be provided at the top of the avoiding notch 33 of the side wall 3, and a recess may be provided at the corresponding position of the upright post 14, as long as the abutting engagement between the two can be realized.

In order to prevent the tray wall from deforming outwards of the box due to the pressure of the goods bulging out, it is preferred to provide an upwardly extending stop wall at the outer side edge of the chassis. When the tray walls are in the erected condition, the bottom thereof abuts against the inner surface of the blocking wall. The blocking wall can have various configurations. For example, a shaped square pipe with a wing plate may be used as the bottom side beam or the bottom end beam, and the wing plate may be used as the barrier wall; the bottom side beam or the bottom end beam can also be provided with a groove, and the outer side vertical wall of the groove is used as a barrier wall.

In the present embodiment, as shown in fig. 7, the upper surface of the bottom end beam 12 has a groove 123 extending in the length direction. When the end wall 2 is attached to the chassis 1, its bottom 21 is received in the recess 123. Thus, the outer vertical wall of the groove 123 is used for blocking the end wall 2, so that the end wall 2 and the chassis 1 can be firmly connected, the end wall 2 is prevented from deforming outwards due to the pressure of goods, meanwhile, the acting force between the connecting shaft 22 and the connecting groove 141 can be reduced, and damage is avoided. In addition, the end wall 2 can be prevented from generating a gap with the chassis 1 when moving upwards due to the matching gap, and goods are prevented from entering the gap. Of course, the recess 123 may not be provided if the clearance between the end wall 2 and the chassis 1 when it moves upward does not cause leakage of the goods.

Preferably, as shown in fig. 7, a lower end of one side of the coupling groove 141 away from the outer side surface 148 of the column 14 (i.e., an inner side wall of the coupling groove 141) is provided with a limit slope 147. The inclined limit surface 147 is inclined in the above-described inclined direction, and for example, as shown in fig. 15, the inclined limit surface 147 is parallel to the ON direction. Such a configuration makes the inclination angle of the end wall 2 with respect to the vertical direction OM a predetermined angle θ when the end wall 2 is inclined outward with respect to the vertical direction OM until the connecting shaft 22 abuts against the limit inclination 147 and the outer side face of the end wall 2 abuts against the upper edge of the outer standing wall of the groove 123. Therefore, the end wall 2 can always keep an inclined state in the process of being pulled obliquely upwards, and the disassembly operation is convenient.

Due to the existence of the groove 123, when the end wall 2 is folded, the bottom 21 thereof is blocked by the outer standing wall of the groove 123, and the end wall 2 needs to be lifted upwards to complete the folding, which is troublesome. Thus, the support block 122 is provided in the groove 123, and the bottom 21 of the end wall 2 is placed on the support block 122. In this way, the end wall 2 extends into the recess 123 so shallowly that it can be folded over directly, simplifying the handling steps. However, such an arrangement weakens the blocking effect of the groove 123 against the end wall 2 in normal use, and therefore, the outer side upright wall of the groove 123 can be appropriately extended upward. The unloading of goods is not particularly affected even if the upper surface of the bottom end beam 12 exceeds the upper surface of the bottom plate 11, as long as the upper surface of at least one pair of the bottom end beam 12 and the bottom side beam 13 is flush with the upper surface of the bottom plate 11.

It will be appreciated that when provided with a snap-fit arrangement to prevent vertical play of the end wall 2 as described above, the end wall 2 cannot be lifted upwardly to complete the fold. If the support block 122 were not provided, the snap fit arrangement would interfere with the groove arrangement and result in the end wall 2 being unable to collapse. Therefore, the supporting blocks 122 are provided, so that the function of folding the end wall can be still realized under the condition that the tray box is simultaneously provided with the clamping structure and the groove for preventing the movement.

In addition, a reinforcing member 121 is also provided in the groove 123. The reinforcing members 121 are connected to two vertical walls of the groove 123, respectively, to play a role of reinforcement. To prevent the opening in the middle of the groove 123 from expanding when the cargo is expanded outward. The upper surface of the reinforcing member 121 may be flush with the upper surface of the supporting block 122 or slightly lower than the upper surface of the supporting block 122.

The folding of the end wall 2 is preferred, since the end wall 2 is arranged such that folding can be done in a straight-forward manner without having to be lifted upwards. Whereas for the side walls 3, the folding step is accomplished when it is inevitable to lift it upwards during folding, since the preferentially folded end walls 2 increase the height of the chassis 1. Therefore, as shown in fig. 5 and 8, the bottom of the side wall 3 may be directly supported by the bottom wall of the recess 133 of the bottom side member 13 corresponding to the side wall 3 without providing a support member in the recess 133. Thus, the bottom of the side wall 3 protrudes into the groove 133 more, and the outer vertical wall of the groove 133 of the bottom side beam 13 does not need to extend upwards beyond the bottom plate 11 and can also play a role of blocking the side wall 3, so that the upper surface of the bottom side beam 13 is flush with the upper surface of the bottom plate 11, and the goods on the bottom plate 11 can be conveniently pushed and unloaded from the position of the bottom side beam 13.

The above detailed description of the tray box according to the present invention has been made, and the detachable tray wall thereof is foldable and detachable, and can be detached in a manner of being tilted outward and pulled obliquely upward, and the detachable tray wall moves toward a direction away from the goods in the tray box all the time in the detachment process, and is not affected by the external expansion pressure of the goods, so that it can be adapted to the carrying requirements of various goods of different natures.

The present invention has been illustrated by the above embodiments, but it should be understood that the above embodiments are for illustrative and descriptive purposes 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. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A pallet box, characterized in that it comprises:

the chassis is rectangular; and

2. A pallet box according to claim 1, characterised in that at least one pair of opposite outer side edges of the chassis are provided with upwardly extending blocking walls against the inner surfaces of which the corresponding pallet walls abut when in the erected condition.

3. The tray box according to claim 2, wherein said chassis includes a rectangular structure defined by four side members, at least one pair of said side members being provided at upper surfaces thereof with grooves extending in a longitudinal direction, and bottom portions of said tray walls corresponding thereto being received in said grooves in an assembled state, outer side standing walls of said grooves being constructed as said blocking walls.

4. The tray case according to claim 2 or 3, wherein inner side walls of the coupling grooves form a stopper slope at a lower end, the stopper slope being configured to extend in the oblique direction;

when the detachable tray wall is inclined outward with respect to the vertical direction to a state where the connecting shaft abuts against the limit inclined surface and the outer side surface of the detachable tray wall abuts against the upper edge of the blocking wall, the angle between the detachable tray wall and the vertical direction is the predetermined angle.

5. The pallet box according to claim 3, characterized in that support blocks are provided in the grooves, said support blocks bearing the pallet walls.

6. A pallet box according to claim 5, characterized in that the upper surface of the rectangular structure is provided with a floor, the upper edges of the outer standing walls of the recesses being higher than the floor.

7. A pallet box according to claim 3, characterized in that the middle of the recess is provided with a reinforcement, which is connected to the two standing walls of the recess, respectively.

8. The pallet box of claim 1, wherein the post provided with the notch is provided with a stop at the outer side surface at a position adjacent to the notch, the stop being configured to be movable between a covering position covering the notch and an open position exposing the notch.

9. The tray box according to claim 1, wherein an avoidance notch is provided on both sides of the bottom of the detachable tray wall to avoid the pillar, and the shape of the avoidance notch is adapted to the shape of the pillar.

10. The tray box of claim 9, wherein one of the relief notch and the corresponding post has a protrusion and the other has a recess that mates with the protrusion.

11. The pallet box of claim 10, comprising a lock configured to detachably connect adjacent pallet walls.

12. The tray box according to claim 1, wherein the sum of the length of the bottom of the detachable tray wall and the length of any one of the connecting shafts is larger than the distance between the inner end faces of the two posts on both sides of the detachable tray wall.

13. The tray box according to claim 1, wherein the sum of the length of the connecting shaft corresponding to the gap and the length of the bottom of the detachable tray wall is smaller than the sum of the distance between the inner end surfaces of the two pillars on both sides of the detachable tray wall and the horizontal extension distance of the gap.

14. The tray bin of claim 1 wherein the predetermined angle is between 10 ° and 45 °.

15. The tray bin of claim 14 wherein the predetermined angle is between 10 ° and 30 °.