CN110002081B

CN110002081B - Folding turnover box

Info

Publication number: CN110002081B
Application number: CN201910355058.0A
Authority: CN
Inventors: 陈道菊
Original assignee: Chongqing Baike Dingyu Technology Co Ltd
Current assignee: Chongqing Baike Dingyu Technology Co Ltd
Priority date: 2019-04-29
Filing date: 2019-04-29
Publication date: 2024-01-23
Anticipated expiration: 2039-04-29
Also published as: CN110002081A

Abstract

The invention relates to a folding turnover box which comprises two vertically arranged front and rear side plates, two vertically arranged left and right side plates and a horizontally arranged bottom plate, wherein folded edges which face the two front and rear side plates respectively are arranged on two vertical side edges of the two left and right side plates, mounting grooves are formed in the outer walls of the two front and rear side plates, pressing parts capable of moving up and down in the vertical direction and two pressing arms are arranged in the mounting grooves, the left end and the right end of each pressing part are hinged with one end of each pressing arm respectively, limiting parts are arranged on the two vertical side edges of the two left and right side plates, the side edges of the outer walls of the two front and rear side plates are arranged between the inner sides of the folded edges and the limiting parts, and one end of each pressing arm far away from each pressing part is arranged beside each limiting part. The invention is convenient and stable to lock; when needs folding, through pressing down the pressing part for preceding curb plate breaks away from the stop of spacing portion around, then curb plate and control curb plate realization folding around the upset in proper order, convenient operation.

Description

Folding turnover box

Technical Field

The invention relates to the field of transportation box equipment, in particular to a folding turnover box.

Background

The folding turnover box is a logistics box, is widely applied to factory turnover, logistics transportation turnover and express transportation turnover, can be unfolded when being used, can be folded when not being used, can greatly reduce the occupied space of the recycling transportation volume and the storage process, and is favorable for mass recycling transportation, storage and preservation.

Many cases have a complicated locking system or unstable locking, and a case having a base, a first side plate, and a second side plate is disclosed in the case of a case described in chinese patent document (application No. 201810328884.1). The first side plate and the second side plate are both arranged on the base and can be folded or erected relative to the base. The first side plate and the second side plate are lockable to each other via a locking structure. The first side plate and the second side plate are engaged with each other via an engagement structure. The left and right edges of the first side plate are further provided with first limit structures, and the left and right edges of the second side plate are further provided with second limit structures. The first limit structure and the second limit structure are arranged as: after the second side plate is unfolded and erected, the first side plate is mutually matched with the second limiting structure in the process of unfolding and locking, so that the first side plate is relatively fixed in position in the direction perpendicular to the second side plate and can move downwards simultaneously. The folding box can realize quick and accurate locking of the adjacent side plates of the folding box, but has poor structural stability of side connection, and when the inner wall of the side plate is impacted by the goods greatly during carrying the goods, the stability of the folding box is still threatened greatly, so that the practicability of the folding box is reduced.

Disclosure of Invention

The invention aims to solve the technical problem of providing the folding turnover box which is simple in structure, simple and convenient to operate, capable of realizing quick locking and unlocking, and firm and stable in locking mode.

The technical scheme for solving the technical problems is as follows: the utility model provides a folding turnover case, includes the front and back curb plate of two vertical settings, the left and right curb plate of two vertical settings and the bottom plate of level setting, two the bottom side limit of front and back curb plate is respectively can inwards fold and articulates on the front and back side limit of bottom plate, two the bottom side limit of left and right curb plate is respectively can inwards fold and articulates on the left and right side limit of bottom plate, two the front and back curb plate is established between the two the left and right curb plate, two be equipped with respectively towards two on the two vertical sides of left and right curb plate the hem of front and back curb plate, two all be provided with the mounting groove on the outer wall of front and back curb plate, be equipped with in the mounting groove and can inwards fold in vertical direction the pressure portion and two press the arm, the left and right both ends of pressure portion articulate two respectively press the one end of arm, the mounting groove is internally provided with supporting parts for supporting the middle parts of the pressing arms respectively, two vertical side edges of the left side plate and the right side plate are provided with limiting parts, two side edges of the outer walls of the front side plate and the rear side plate are arranged between the inner sides of the folded edges and the limiting parts, one end of the pressing arms, which is far away from the pressing parts, extends towards the direction of the limiting parts and penetrates through and stretches out of the end walls of the mounting groove, is arranged beside the limiting parts, and when the pressing parts are pressed downwards, the two pressing arms respectively rotate by taking the two supporting parts as supporting points, and one end of the two pressing arms, which is far away from the pressing parts, outwards presses the limiting parts in the rotating process, so that the front side plate and the rear side plate are separated from the blocking of the limiting parts.

The beneficial effects of the invention are as follows: after the front side plate, the rear side plate, the left side plate and the right side plate are turned to be vertically arranged, the side edges of the front side plate and the rear side plate are limited between the limiting parts and the folded edges through the limiting parts, so that the locking of the front side plate, the rear side plate, the left side plate and the right side plate is realized, and the locking is convenient and stable; when needs folding, through pressing down the pressing part, the pressing part drives the pressing arm and rotates with supporting part as the fulcrum to realize outwards pressing the spacing portion, make preceding curb plate break away from spacing portion's the stop around, then overturn preceding curb plate and control curb plate realization folding in proper order, convenient operation.

On the basis of the technical scheme, the invention can be improved as follows.

Further, the mounting groove is the bar mounting groove that length direction level set up, the middle part interval of mounting groove is equipped with two vertical setting's backup pad, but press the portion to establish with sliding from top to bottom between two the backup pad, be equipped with the confession in the backup pad press the through-hole that the arm passed, two press the one end of arm pass and stretch out after the through-hole with press the portion hinge.

The beneficial effects of adopting the further scheme are as follows: through setting up the bar mounting groove for hold the portion of pressing and press the arm, avoid pressing the portion and press the arm protrusion front and back curb plate's outer wall and lead to damaging in the use.

Further, the supporting part is a U-shaped supporting piece arranged in the mounting groove, two ends of the U-shaped supporting piece are fixedly connected with two side walls of the mounting groove respectively, and the pressing arm is arranged between the U-shaped supporting piece and the bottom of the mounting groove.

The beneficial effects of adopting the further scheme are as follows: the supporting part adopts U type support piece, can play the effect of fulcrum on the one hand, can carry out spacingly to pressing the arm on the other hand, avoids pressing the arm and breaks away from the mounting groove.

Further, the side of the vertical side of the left side plate and the right side plate is provided with a mounting hole for mounting the limiting part, the limiting part comprises a mounting bar and a limiting block, one end of the mounting bar is fixedly connected with an inner wall of the mounting hole, the limiting block is fixedly arranged on one surface of the front side plate and the rear side plate, the vertical side of the front side plate and the rear side plate is arranged between the limiting block and the folding edge, and one end of the pressing arm, which is far away from the pressing part, is arranged beside the limiting block.

The beneficial effects of adopting the further scheme are as follows: one end of the mounting bar is fixedly connected with the inner wall of the mounting hole, the side edges of the front side plate and the rear side plate are limited through the limiting block, when the locking is required to be opened, the pressing arm presses the limiting block outwards, the front side plate and the rear side plate are separated from the blocking of the limiting block, and the limiting block resets after the pressing part is loosened due to the fact that the bar-shaped mounting bar has certain elasticity, so that the next locking is performed.

Further, the lower part of stopper is by supreme inclined plane that inclines to being close to in the curb plate top direction around gradually, press the arm to keep away from press the one end of portion to establish the vertical below of lower part of stopper, the stopper orientation left and right sides board middle part the side be by being close to the side of installation strip to keep away from the side of installation strip gradually to being close to the inclined plane of the direction slope of curb plate outer wall around.

The beneficial effects of adopting the further scheme are as follows: the lower part of the limiting block adopts an inclined plane, so that in the process that one end of the pressing arm far away from the pressing part moves upwards, the inclined plane is forced, and the limiting block is gradually pressed outwards until the front side plate and the rear side plate are separated from the blocking of the limiting block.

Further, the vertical side of preceding curb plate is last all to be equipped with the storage tank, two press the arm keep away from the one end of pressing the portion is passed and is stretched out place respectively behind the cell wall at mounting groove both ends in the storage tank, the storage tank switches on the inner wall of preceding curb plate, the stopper is arranged in the storage tank, the storage tank orientation the wall surface of the outer wall of preceding curb plate with form spacing wall between the outer wall of preceding curb plate and the rear curb plate, spacing wall is arranged in the stopper with between the hem.

The beneficial effects of adopting the further scheme are as follows: the setting of holding groove can make the setting press the arm in the mounting groove only need on a vertical plane rotate, improves the stability when releasing the lock.

Further, be equipped with a plurality of locating holes on the hem, the outer wall of preceding curb plate is close to vertical side department and is equipped with a plurality of reference columns, and a plurality of the reference column one-to-one inserts and establishes in the locating hole.

The beneficial effects of adopting the further scheme are as follows: the stability after locking can be further limited to the setting of locating hole and reference column, avoids preceding curb plate and control curb plate to take place relative movement, improves preceding curb plate and control curb plate connection's fastness and joint strength.

Further, front and rear side blocks extending upwards are arranged on the front side and the rear side of the bottom plate, the height of each front and rear side block is larger than or equal to the sum of the thicknesses of the two front and rear side plates, left and right side blocks extending upwards are arranged on the left side and the right side of the bottom plate, and the height of each left and right side block is larger than or equal to the sum of the thicknesses of the two front and rear side plates and the two left and right side plates.

The beneficial effects of adopting the further scheme are as follows: the arrangement can enable the front side plate, the rear side plate, the left side plate and the right side plate to be arranged in the left side block and the right side block after folding, and damage to the front side plate, the rear side plate, the left side plate, the right side plate, the left side plate and the right side plate after protruding out of the left side block in the transportation process is avoided.

Further, the front side plate and the rear side plate are respectively a front side plate and a rear side plate, the left side plate and the right side plate are respectively a left side plate and a right side plate, the rotation axis of the rear side plate after the front side plate and the rear side plate are hinged is higher than the rotation axis of the front side plate after the front side plate and the rear side plate are hinged, the rotation axis of the left side plate after the left side plate and the right side plate is higher than the rotation axis of the rear side plate after the front side plate and the rear side plate are hinged, and the rotation axis of the right side plate after the left side plate and the right side plate are hinged is the same as the horizontal height of the rotation axis of the left side plate after the left side plate and the right side plate are hinged.

The beneficial effects of adopting the further scheme are as follows: the arrangement enables the front side plate to be horizontally arranged on the bottom plate after being folded, the rear side plate is horizontally arranged on the front side plate, and the left side plate and the right side plate are horizontally arranged on the rear side plate.

Further, a pressing groove which is convenient for the hand to insert and press the pressing part downwards is formed in one surface of the pressing part, which is far away from the bottom of the mounting groove.

The beneficial effects of adopting the further scheme are as follows: the pressing groove is provided to facilitate pressing of the pressing portion.

Drawings

FIG. 1 is a schematic perspective view of the present invention;

FIG. 2 is a rear view of the present invention;

FIG. 3 is a right side view of the present invention;

FIG. 4 is an enlarged view of the connection between the stop portion and the pressing arm in FIG. 1;

in the drawings, the list of components represented by the various numbers is as follows:

1-1, a front side plate, 1-2, a rear side plate, 2-1, a left side plate, 2-2, a right side plate, 3, a bottom plate, 4, a folded edge, 5, a mounting groove, 6, a pressing part, 7, a pressing arm, 8, a supporting part, 9-1, a mounting strip, 9-2, a limiting block, 10, a supporting plate, 11, a through hole, 12, a mounting hole, 13, a containing groove, 14, a limiting wall, 15, a positioning hole, 16, a positioning column, 17, front and rear side blocks, 18, left and right side blocks, 19 and a pressing groove.

Detailed Description

The principles and features of the present invention are described below with reference to the drawings, the examples are illustrated for the purpose of illustrating the invention and are not to be construed as limiting the scope of the invention.

As shown in fig. 1, the embodiment of the invention comprises two vertically arranged front and rear side plates, two vertically arranged left and right side plates and a horizontally arranged bottom plate 3, wherein the bottom side edges of the two front and rear side plates are respectively hinged on the front and rear side edges of the bottom plate 3 in an inward folding way, the bottom side edges of the two left and right side plates are respectively hinged on the left and right side edges of the bottom plate 3 in an inward folding way, the two front and rear side plates are arranged between the two left and right side plates, the two vertical side edges of the two left and right side plates are provided with folded edges 4 respectively facing the two front and rear side plates, the folded edges 4 extend downwards from the top parts of the left and right side plates to the bottom parts of the left and right side plates, the outer walls of the two front and rear side plates are provided with mounting grooves 5, the installation groove 5 is internally provided with a pressing part 6 and two pressing arms 7 which can move up and down in the vertical direction, in the embodiment, the pressing part 6 is arranged at the middle part of the installation groove 5 in the length direction, the two pressing arms 7 are symmetrically arranged about the pressing part 6, the left end and the right end of the pressing part 6 are respectively hinged with one end of the two pressing arms 7, in the embodiment of the invention, the pressing part 6 can be hinged with the pressing arms 7 through a rotating shaft, the rotating shaft is horizontally arranged and is vertical to the bottom of the installation groove 5, the two sides of the pressing part 6 in the installation groove 5 are respectively provided with a supporting part 8 used for supporting the middle part of the pressing arms 7, two vertical sides of the two left side plates and the right side plates are respectively provided with a limiting part, the sides of the outer walls of the two front side plates and the rear side plates are arranged between the inner side of the folded edge 4 and the limiting part, the pressing arms 7 are far away from one ends of the pressing portions 6, extend towards the direction of the limiting portions, pass through and extend out of the end walls of the mounting grooves 5, and are arranged beside the limiting portions, when the pressing portions 6 are pressed downwards, the two pressing arms 7 rotate respectively with the two supporting portions 8 serving as supporting points, and one ends of the two pressing arms 7, away from the pressing portions 6, press the limiting portions outwards in the rotating process, so that the front side plate and the rear side plate are separated from the blocking of the limiting portions.

After the front side plate, the rear side plate, the left side plate and the right side plate are turned to be vertically arranged, the side edges of the front side plate and the rear side plate are limited between the limiting parts and the folded edges 4 through the limiting parts, so that the locking of the front side plate, the rear side plate, the left side plate and the right side plate is realized, and the locking is convenient and stable; when needs folding, through pressing down pressing portion 6, pressing portion 6 drives and presses arm 7 and rotate with supporting part 8 as the fulcrum to realize outwards pressing limit portion, make preceding curb plate break away from limit portion's the stop around, then overturn preceding curb plate and control curb plate realization folding in proper order, convenient operation.

As shown in fig. 2, in this embodiment, the mounting groove 5 is a strip-shaped mounting groove horizontally arranged in a length direction, the strip-shaped mounting groove is a groove body formed in the injection molding process of the front side plate and the rear side plate, two vertically arranged support plates 10 are arranged at intervals in the middle of the mounting groove 5, the support plates 10 and the groove walls of the mounting groove 5 are integrally formed, the pressing part 6 is slidably arranged between the two support plates 10 up and down, preferably, two ends of the pressing part 6 are respectively and slidably connected with the two support plates 10, through holes 11 through which the pressing arms 7 pass are formed in the support plates 10, and one ends of the two pressing arms 7 pass through and extend out of the through holes 11 and then are hinged with the pressing part 6. Through setting up the bar mounting groove for hold and press portion 6 and press arm 7, avoid pressing portion 6 and press arm 7 protrusion front and back curb plate's outer wall and lead to damaging in the use, can lead to the direction of movement of pressing portion 6 and pressing portion 6 simultaneously, improve the stability when releasing the lock.

As shown in fig. 1, in this embodiment, the supporting portion 8 is a U-shaped supporting member disposed in the mounting groove 5, two ends of the U-shaped supporting member are fixedly connected to two side walls of the mounting groove 5, and the pressing arm 7 is disposed between the U-shaped supporting member and a bottom of the mounting groove 5. The supporting part 8 adopts a U-shaped supporting piece, so that the supporting point can be realized on one hand, the pressing arm 7 can be limited on the other hand, the pressing arm 7 is prevented from being separated from the mounting groove 5, and the U-shaped supporting piece and the front side plate and the rear side plate are integrally injection molded.

As shown in fig. 3 and 4, in the embodiment of the present invention, the vertical sides of the left and right side plates are respectively provided with a mounting hole 12 for mounting the limiting part, the mounting holes 12 penetrate through two sides of the left and right side plates, the limiting part comprises a mounting bar 9-1 and a limiting block 9-2, the mounting bar 9-1, the limiting block 9-2 and the left and right side plates are integrally injection molded, one end of the mounting bar 9-1 is fixedly connected with an inner wall of the mounting hole 12, the limiting block 9-2 is fixedly arranged on one surface of the other end of the mounting bar 9-1 facing the front and rear side plates, the vertical sides of the front and rear side plates are arranged between the limiting block 9-2 and the folded edges 4, one end of the pressing arm 7 away from the pressing part 6 is arranged beside the limiting block 9-2, one end of the mounting bar 9-1 is fixedly connected with the inner wall of the mounting hole 12, the side edges of the front and rear side plates are limited through the limiting block 9-2, and when the locking is required to be opened, the pressing arm 7 presses the limiting block 9-2 outwards, so that the limiting block 9-2 is separated from the front and rear side plates are reset by the elastic side plates, and the limiting block 9-2 is released once. Preferably, the lower portion of the limiting block 9-2 is an inclined surface gradually inclined from bottom to top in a direction approaching to the top of the front and rear side plates, one end of the pressing arm 7, which is far away from the pressing portion 6, is arranged vertically below the lower portion of the limiting block 9-2, and the side surface of the limiting block 9-2, which faces the middle portion of the left and right side plates, is an inclined surface gradually inclined from the side edge approaching to the mounting bar 9-1 to the side edge far away from the mounting bar 9-1 in a direction approaching to the outer walls of the front and rear side plates. The lower part of the limiting block 9-2 adopts an inclined surface, so that in the process that one end of the pressing arm 7 far away from the pressing part 6 moves upwards, the inclined surface is applied with force, and the limiting block 9-2 is gradually pressed outwards until the front side plate and the rear side plate are separated from the blocking of the limiting block 9-2, and in order to further reduce the friction force between the pressing arm 7 and the limiting block 9-2, the end part of the pressing arm 7, which is close to one end of the limiting block 9-2, is arc-shaped.

As shown in fig. 1 and 4, in the embodiment of the present invention, the vertical sides of the front and rear side plates are respectively provided with a receiving groove 13, one end of each pressing arm 7, which is far away from the pressing part 6, passes through and extends out of the groove walls at two ends of the mounting groove 5, and then is respectively placed in the receiving groove 13, the receiving groove 13 conducts the inner walls of the front and rear side plates, the limiting block 9-2 is placed in the receiving groove 13, a limiting wall 14 is formed between the wall surface of the outer wall of the receiving groove 13 facing the front and rear side plates and the outer wall of the front and rear side plates, and the limiting wall 14 is placed between the limiting block 9-2 and the folded edge 4. The arrangement of the accommodating groove 13 can enable the pressing arm 7 arranged in the mounting groove 5 to rotate on a vertical plane only required, so that stability in unlocking is improved.

In order to further limit the stability after locking, the relative movement of the front side plate, the rear side plate, the left side plate and the right side plate is avoided, the connection firmness and the connection strength of the front side plate, the rear side plate, the left side plate and the right side plate are improved, a plurality of positioning holes 15 are formed in the folded edge 4, a plurality of positioning columns 16 are arranged on the outer walls of the front side plate and the rear side plate, close to the vertical side edges, and a plurality of positioning columns 16 are inserted in the positioning holes 15 in a one-to-one correspondence mode.

Preferred embodiments are: the front side and the rear side of the bottom plate 3 are respectively provided with a front side baffle 17 and a rear side baffle 17 which extend upwards, the height of the front side baffle 17 and the rear side baffle 17 is larger than or equal to the sum of the thicknesses of the front side plate and the rear side plate, the left side and the right side of the bottom plate 3 are respectively provided with a left side baffle 18 and a right side baffle 18 which extend upwards, the left side baffle 18 is higher than or equal to the sum of the thicknesses of the front side plate, the rear side plate and the left side plate, the right side plate and the left side plate after being folded, the front side plate, the rear side plate, the left side plate, the right side plate and the left side plate are prevented from being protruded to be damaged in the transportation process. The two front side plates and the rear side plates are respectively a front side plate 1-1 and a rear side plate 1-2, the left side plate and the right side plate are respectively a left side plate 2-1 and a right side plate 2-2, the rotation axis of the rear side plate 1-2 hinged with the front side block 17 and the rear side plate 1-1 hinged with the front side block 17 and the rear side block 17 is higher than the rotation axis of the left side plate 2-1 hinged with the left side block 18 and the right side plate 1-2 hinged with the front side block 17 and the rotation axis of the right side plate 2-2 hinged with the left side block 18 and the left side plate 2-1 hinged with the left side block 18 are the same in horizontal height. The arrangement is that the front side plate 1-1 is horizontally arranged on the bottom plate 3 after being folded, the rear side plate 1-2 is horizontally arranged on the front side plate 1-1, and the left side plate 2-1 and the right side plate 2-2 are horizontally arranged on the rear side plate 1-2. The pressing part 6 is provided with a pressing groove 19 which is convenient for the hand to insert and press the pressing part 6 downwards on one surface far away from the bottom of the mounting groove 5. The pressing groove 19 is provided to facilitate pressing of the pressing portion 6.

Working principle: when the box is opened, the left side plate 2-1 and the right side plate 2-2 are vertically arranged in sequence, then the limiting wall 14 on the rear side plate 1-2 to the rear side plate 1-2 is rotated to move between the limiting block 9-2 and the folded edge 4, then the limiting wall 14 on the front side plate 1-1 to the front side plate 1-1 is rotated to move between the limiting block 9-2 and the folded edge 4, at the moment, locking is realized between the front side plate and the rear side plate and between the left side plate and the right side plate, the positioning columns 16 are inserted into the positioning holes 15, and the front side plate 1-1, the rear side plate 1-2, the left side plate 2-1, the right side plate 2-2 and the bottom plate 3 form a frame type box with an opening at the top end, so that the conveying of the articles is realized by placing the articles into the box. When the locking of the front side plate, the rear side plate and the left side plate and the right side plate is required to be released, a hand is inserted into the pressing groove 19, the pressing part 6 is pressed downwards, the pressing part 6 moves downwards to drive one end of the pressing arm 7, which is far away from the pressing part 6, to rotate upwards by taking the supporting part 8 as a supporting point, one end of the pressing arm 7, which is far away from the pressing part 6, presses the inclined surface of the lower part of the limiting block 9-2 in the upward rotating process, and the front side plate and the rear side plate are connected in a sliding mode, so that the limiting block 9-2 gradually moves outwards until the front side plate and the rear side plate are separated from the blocking of the limiting block 9-2, and then the front side plate and the rear side plate are rotated, so that folding is realized.

The invention has simple structure and convenient operation, realizes the quick locking and unlocking of the front side plate, the rear side plate and the left side plate and the right side plate, and can ensure the connection strength of the front side plate, the rear side plate and the left side plate and the right side plate and the reliability in use.

The foregoing description of the preferred embodiments of the invention is not intended to limit the invention to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the invention are intended to be included within the scope of the invention.

Claims

1. The utility model provides a folding turnover case, its characterized in that includes two vertical setting around curb plate, two vertical setting around curb plate and bottom plate (3) that the level set up, two the bottom side of around curb plate is articulated respectively can inwards fold on the front and back side of bottom plate (3), two the bottom side of around curb plate is articulated respectively can inwards fold around on bottom side of bottom plate (3), two around curb plate establish two between the curb plate around, two be equipped with respectively towards two on the vertical side of around curb plate hem (4) of around curb plate all be provided with mounting groove (5) on the outer wall of around curb plate, be equipped with in mounting groove (5) can inwards fold down in the vertical direction pressing part (6) and two pressing arm (7), pressing part (6)'s left and right ends hinges respectively one end of two pressing arm (7), be located in pressing part (5) are established respectively pressing part (6) are equipped with in the both sides pressing part (7) are equipped with respectively pressing part (6) are in the side wall (7) is in the limit position is passed around to the limit part (4) is in the lateral limit part is passed around the limit part (4) of two side wall (4) are located in the lateral limit part (4) are located, when the pressing part (6) is pressed downwards, the two pressing arms (7) respectively rotate by taking the two supporting parts (8) as fulcrums, and one ends of the two pressing arms (7) away from the pressing part (6) press the limiting parts outwards in the rotating process so that the front side plate and the rear side plate are separated from the blocking of the limiting parts.

2. The folding turnover box according to claim 1, wherein the mounting groove (5) is a strip-shaped mounting groove horizontally arranged in the length direction, two vertically arranged support plates (10) are arranged at the middle of the mounting groove (5) at intervals, the pressing part (6) is arranged between the two support plates (10) in a vertically sliding manner, a through hole (11) for the pressing arm (7) to pass through is formed in the support plate (10), and one ends of the two pressing arms (7) pass through and extend out of the through hole (11) and then are hinged with the pressing part (6).

3. The folding turnover box according to claim 1, wherein the supporting part (8) is a U-shaped supporting piece arranged in the installation groove (5), two ends of the U-shaped supporting piece are fixedly connected with two side walls of the installation groove (5) respectively, and the pressing arm (7) is arranged between the U-shaped supporting piece and the bottom of the installation groove (5).

4. The folding turnover box according to claim 1, wherein mounting holes (12) for mounting the limiting parts are formed beside vertical side edges of the left side plate and the right side plate, the limiting parts comprise mounting bars (9-1) and limiting blocks (9-2), one ends of the mounting bars (9-1) are fixedly connected with one inner wall of the mounting holes (12), the limiting blocks (9-2) are fixedly arranged on one surfaces, facing the front side plate and the rear side plate, of the other ends of the mounting bars (9-1), vertical side edges of the front side plate and the rear side plate are arranged between the limiting blocks (9-2) and the folded edges (4), and one ends, far away from the pressing parts (6), of the pressing arms (7) are arranged beside the limiting blocks (9-2).

5. The folding turnover box of claim 4, wherein the lower part of the limiting block (9-2) is an inclined surface which gradually inclines from bottom to top towards the direction approaching the top of the front side plate and the rear side plate, one end of the pressing arm (7) away from the pressing part (6) is arranged under the lower part of the limiting block (9-2), and the side surface of the limiting block (9-2) facing the middle part of the left side plate and the right side plate is an inclined surface which gradually inclines from the side edge approaching the mounting bar (9-1) to the side edge far from the mounting bar (9-1) towards the direction approaching the outer walls of the front side plate and the rear side plate.

6. The folding turnover box according to claim 4 or 5, wherein the vertical side surfaces of the front side plate and the rear side plate are respectively provided with a containing groove (13), one end, far away from the pressing part (6), of each pressing arm (7) penetrates through and extends out of the groove walls at two ends of the mounting groove (5) and then is respectively arranged in the containing groove (13), the containing groove (13) is communicated with the inner walls of the front side plate and the rear side plate, the limiting block (9-2) is arranged in the containing groove (13), a limiting wall (14) is formed between the wall surface of the outer wall of the front side plate and the outer wall of the rear side plate, and the limiting wall (14) is arranged between the limiting block (9-2) and the folded edge (4).

7. A folding turnover box as claimed in any one of claims 1 to 5, characterized in that said folded edge (4) is provided with a plurality of positioning holes (15), said outer walls of said front and rear side plates are provided with a plurality of positioning posts (16) near the vertical sides, and a plurality of said positioning posts (16) are inserted in said positioning holes (15) in one-to-one correspondence.

8. A folding turnover box according to any one of claims 1 to 5, characterized in that front and rear side baffles (17) extending upwards are provided on the front and rear sides of said bottom plate (3), the height of said front and rear side baffles (17) is greater than or equal to the sum of the thicknesses of two of said front and rear side plates, left and right side baffles (18) extending upwards are provided on the left and right sides of said bottom plate (3), and the height of said left and right side baffles (18) is greater than or equal to the sum of the thicknesses of two of said front and rear side plates and two of said left and right side plates.

9. The folding turnover box of claim 8, characterized in that the front and rear side plates are respectively a front side plate (1-1) and a rear side plate (1-2), the left and right side plates are respectively a left side plate (2-1) and a right side plate (2-2), the rotation axis of the rear side plate (1-2) hinged with the front and rear side plate (17) is higher than the rotation axis of the front side plate (1-1) hinged with the front and rear side plate (17), the rotation axis of the left side plate (2-1) hinged with the left and right side plate (18) is higher than the rotation axis of the rear side plate (1-2) hinged with the front and rear side plate (17), and the rotation axis of the right side plate (2-2) hinged with the left and right side plate (18) is at the same level as the rotation axis of the left side plate (2-1) hinged with the left and right side plate (18).

10. A folding turnover box as claimed in any one of claims 1 to 5, characterized in that a pressing groove (19) for facilitating the insertion of a hand to press down said pressing part (6) is provided on a side of said pressing part (6) away from the bottom of said mounting groove (5).