An integrated folding box

Abstract

The present invention discloses an integrated folding box, which is applied to the logistics turnover industry. The integrated folding box includes a chassis, and a front door, a left door, a right door and a rear door vertically connected to four sides of the chassis. Fixed slots are respectively arranged at four corners of the chassis. The front door and the rear door are respectively fixed to the chassis through two columns and two embedded bodies. The embedded bodies and the fixed slots are detachably and rotatably fixed. The left door and the right door are hinged to the chassis and fixed to the columns through locks. The front door is provided with an openable door leaf, and the door leaf is fixed to the column through a lock. A first stacking groove is arranged on the top surface of the column, stacking positioning blocks are arranged at four corners of the lower surface of the chassis, and a fixed slot stacking protrusion is arranged at the top of the fixed slot. Compared with the prior art, the present invention is more convenient and safe in folding, disassembly, etc., and can be stacked in both the upright and folded states.

Description

Technical Field

[0001] The present invention relates to the logistics turnover industry, and more specifically, to a box device for carrying, loading and unloading, and transporting and turning over non-metallic raw material blocks such as rubber and chemical fibers. Background Art

[0002] Folding boxes or logistics boxes are generally used for carrying, loading and unloading, and transporting and turning over non-metallic raw material blocks such as rubber and chemical fibers, and generally include a chassis, front and rear doors, and left and right doors.

[0003] In the prior art, when the front and rear doors are installed on the chassis, two bolts need to be applied with adhesive at the lower end of each front and rear door, and then manually screwed on. Because the front and rear doors are relatively heavy, and because the bolts are arranged at the bottom, at least two people are required to complete the operation, which is time-consuming and laborious. During maintenance, it is even necessary to heat and melt the solidified adhesive and then reverse the operation to unscrew the bolts one by one before the front and rear doors can be removed.

[0004] In the prior art, the connection between the left and right doors and the chassis is through a fork shaft and bolts. Due to the structural dimensions, the diameter of the fork shaft is very small. Although high-strength materials are used, after years of opening and closing operations, the reality is that the deformation is relatively serious, affecting the service life. Moreover, the left and right door panels need to be profiled at the intersection of the fork shafts to avoid rubber chips from entering. Although it plays a protective role in preventing rubber chips from entering, the processing and profiling process is complex, time-consuming and laborious.

[0005] In the prior art, the four dimensions of the chassis use 3.0 mm thick Z-shaped profiled steel strips. Although high-strength materials are used, due to the relatively large structural dimensions, it is easy to deform. Therefore, several vertical pipes are used for reinforcement, and the design is rigid and complicated. After all, the upper part of the Z shape is still a single piece without rib support, and only the so-called (high-strength plate) with a thickness of 3 mm is used to block the outward movement of the large left and right doors, which is slightly insufficient in strength.

[0006] In the prior art, for this kind of metal box, whether it is stacked after folding or stacked after loading, due to the small size of the stacking parts, it is quite difficult for the operator to operate. Due to the limitations of the internal and external dimensions of the box, for the design of this form of stacking parts, it is impossible to increase the size of the stacking parts, which has now become a chronic problem in the industry, and users' feedback and willingness to modify are strong.

[0007] In the prior art, the operation of erecting a folding box is extremely cumbersome. In the folded state, when the front and rear doors are manually lifted from the folded state to the erect state, the front and rear doors are not vertically positioned and standing upright. Due to the positioning structure, they need to tilt outward at a certain angle. After the left and right doors are opened and erected, one hand needs to support the left and right doors, and the other hand needs to grab the front and rear doors and turn them inward. At the same time, the hand supporting the left and right doors needs to open the rotary latch on the left and right doors. After the front and rear doors are closed against the left and right doors, release and adjust the hand controlling the latch of the left and right doors, and fasten it before the operation on one side can be completed. Then, when operating the locking of the other side of the same left and right doors and the other front and rear doors, because they are already misaligned, the other side of the left and right doors needs to be pushed inward by a certain distance, and the latch needs to be forcefully lifted and not released. The other hand needs to pull the other front and rear door inward to be close, and after the latch is aligned, it can be locked.

[0008] When locking the other side of the left and right doors, the situation becomes even more difficult. By this time, the two front and rear doors have been locked and erected with the first pair of left and right doors. Both latches at both ends need to be forcefully flipped open, and then aligned and fastened. Since it is almost impossible to operate the two latches simultaneously, only one can be operated at a time. But this is exactly the problem: when the second pair of left and right doors is flipped to a nearly erect state, one hand is needed for the front and rear doors and one hand for the left and right door locks; when locking the second latch of the second pair of left and right doors, the latch is already in a "jammed" state. One hand needs to push the left and right doors inward, and the other hand needs to lift the latch plate buckle. At this time, the hand that needs to move the plate buckle needs to be exchanged, and then the other hand needs to straighten the front and rear doors. After alignment, lock the latch. It can be seen that the process is very complicated. Summary of the Invention

[0009] The technical problem to be solved by the present invention is to provide a box body to solve the problems mentioned in the background art.

[0010] To achieve the above object, the present invention adopts the following technical solutions:

[0011] The present invention actually includes a variety of technical solutions to solve different technical problems. All technical solutions include a chassis and four doors respectively vertically connected to the four sides of the chassis. The front door is installed on the front side of the chassis, the left door is installed on the left side of the chassis, and the right door is installed on the right side of the chassis. However, the specific forms may vary:

[0012] Solution 1: A folding box based on a detachable and foldable upright column: Under this technical solution, at least one door is installed on the chassis in the following installation manner of the rear door (referring to the overall solution description below Solution 14). When a door is installed on its corresponding side in the following installation manner of the rear door, fixing grooves are provided at both ends of this side. Under this solution, the door can be easily disassembled and easily folded down, but generally it is not easy to fall off.

[0013] Solution 2: A logistics box with an openable door leaf: This corresponds to a logistics box with an openable door leaf itself, such as the front door described below. The door leaves of other doors can also be installed in the same way as the front door described below so that they can be opened. However, the specific forms of the fixing slots, columns, and inlays are not emphasized. As long as the columns are installed in the fixing slots through the inlays to support the door leaf, it can be fixedly embedded or embedded in the following way.

[0014] Solution 3: A self-locking folding box based on hinges: This corresponds to the installation method of the left door and the right door. In a folding box, at least one door is installed in the folding box in the same way as the left door described below. In this installation form, the door can be folded and its lock can be self-locked.

[0015] Solution 4: A stackable logistics box: This only includes the stacking technology when the logistics box is upright, corresponding to the corresponding stacking of the following first stacking groove and stacking protrusion.

[0016] Solution 5: A stackable folding box: This includes the stacking technology when the folding box is folded, corresponding to the corresponding stacking of the following fixing slot and stacking protrusion. At this time, it is only required that the column can be removed from the fixing slot. Therefore, after removing the column, the door can be put into the box to achieve folding.

[0017] Solution 6: A folding box with an openable door leaf: This includes Solution 1 + Solution 2. At this time, the technical solution between the fixing slot and the column of the front door is detachable and foldable, and the front door leaf can be opened. At least or all of the four doors can be installed on the chassis according to this solution.

[0018] Solution 7: A folding box based on the combination of detachable collapsible columns and hinges: This includes 1 + Solution 3. At this time, the front and rear doors are fixed to the chassis in the way of detachable collapsible columns, and the left and right doors are fixed to the chassis by hinges, but the specific form of the lock is not included.

[0019] Solution 8: A self-locking folding box based on the combination of detachable collapsible columns and hinges: This includes 1 + Solution 3. At this time, the front and rear doors are fixed to the chassis in the way of detachable collapsible columns, and the left and right doors are fixed to the chassis by hinges, including the specific form of the left and right door locks.

[0020] Solution 9: A folding box with an openable door leaf based on the combination of detachable collapsible columns and hinges: This includes Solution 6 + Solution 3. At this time, the folding box can be folded and the door leaf can be opened.

[0021] Solution 10: A folding box with an openable and self-locking door leaf based on the combination of detachable collapsible columns and hinges: This includes Solution 8 + Solution 9.

[0022] Solution 11: A dual-purpose stackable folding box. This includes Solution 4 + Solution 5. At this time, the folding box can be stacked in both the upright and folded states.

[0023] Solution 12: A stackable folding box based on the combination of a detachable collapsible upright column and a hinge. This includes Solution 7 + Solution 5.

[0024] Solution 13: A dual-purpose stackable folding box based on the combination of a detachable collapsible upright column and a hinge. This includes Solution 7 + Solution 11.

[0025] Solution 14: An integrated folding box. This includes Solution 1 + Solution 2 + Solution 3 + Solution 4 + Solution 5.

[0026] The overall solution of the present invention (actually Solution 14) is described as follows. All the above solutions are determined by combining the specific descriptions of each solution with the following description:

[0027] The present invention includes a chassis, and a front door, a rear door, a left door, and a right door respectively vertically connected to the four sides of the chassis; fixing grooves are provided at the four corners of the chassis, namely a rear left fixing groove, a rear right fixing groove, a front left fixing groove, and a front right fixing groove;

[0028] The rear door includes a rear left upright column, a rear right upright column, and a rear door panel fixed between the rear left upright column and the rear right upright column;

[0029] A rear left fitting is connected to the bottom of the rear left upright column, and the rear left fitting is embedded in the rear left fixing groove;

[0030] A rear right fitting is connected to the bottom of the rear right upright column, and the rear right fitting is embedded in the rear right fixing groove;

[0031] The rear left fixing groove includes a rear left bottom plate, a rear left left side plate vertically connected to the left side of the rear left bottom plate, a rear left right side plate vertically connected to the right side of the rear left bottom plate, and a rear left rear side plate vertically connected to the rear side of the rear left bottom plate; a vertical rear left sliding groove is provided on the right side surface of the rear left left side plate, the top width of the rear left sliding groove is d1, the middle width of the rear left sliding groove is d2, and the bottom width of the rear left sliding groove is d3;

[0032] A rear left top boss protrudes from the top of the left side surface of the rear left fitting, and the top of the rear left top boss is connected to the bottom surface of the rear left upright column; a rear left bottom boss protrudes from the bottom of the left side surface of the rear left fitting; the width of the rear left top boss in the front-rear direction is d1; the rear left bottom boss is a short cylinder with a small corner cut off by a rear left cutting inclined plane and a diameter of d5; the maximum width of the rear left bottom boss in the direction perpendicular to the rear left cutting inclined plane is d1, and the maximum width of the rear left bottom boss in the front-rear direction is d4;

[0033] d1, d2, d3, d4, d5 satisfy the following formula: d1 < d4 ≤ d5 ≤ d3 < d2;

[0034] When the rear left fitting body is inserted into the rear left fixing groove, the rear left bottom boss is located at the bottom of the rear left sliding groove, and the rear left top boss is inserted into the top of the rear left sliding groove;

[0035] The rear right fixing groove includes a rear right bottom plate, a rear right right side plate vertically connected to the right side of the rear right bottom plate, a rear right left side plate vertically connected to the left side of the rear right bottom plate, and a rear right rear side plate vertically connected to the rear side of the rear right bottom plate; a vertical rear right sliding groove is formed on the left side surface of the rear right right side plate, the top width of the rear right sliding groove is d1, the middle width of the rear right sliding groove is d2, and the bottom width of the rear right sliding groove is d3;

[0036] A rear right top boss is protrudingly arranged at the top of the right side surface of the rear right fitting body, and the top end of the rear right top boss is connected to the bottom surface of the rear right upright column; a rear right bottom boss is protrudingly arranged at the bottom of the right side surface of the rear right fitting body; the width of the rear right top boss in the front-rear direction is d1; the rear right bottom boss is a short cylinder with a small corner cut off by a rear right cutting inclined plane and a diameter of d5; the maximum width of the rear right bottom boss in the direction perpendicular to the rear right cutting inclined plane is d1, and the maximum width of the rear right bottom boss in the front-rear direction is d4;

[0037] When the rear right fitting body is inserted into the rear right fixing groove, the rear right bottom boss is located at the bottom of the rear right sliding groove, and the rear right top boss is inserted into the top of the rear right sliding groove;

[0038] A horizontal rear lower fitting strip is connected between the rear left fixing groove and the rear right fixing groove, and a rear upper fitting strip is fixed to the bottom of the rear door panel; a rear lower fitting protrusion is vertically upward arranged at the rear side of the top surface of the rear lower fitting strip, and a rear upper fitting depression is arranged at the rear side of the bottom surface of the rear upper fitting strip;

[0039] When the rear left fitting body is inserted into the rear left fixing groove and the rear right fitting body is inserted into the rear right fixing groove, the rear lower fitting protrusion is fitted into the rear upper fitting depression;

[0040] The front door includes a front left upright column, a front right upright column, and a front door panel located between the front left upright column and the front right upright column; the edge of the front door panel protrudes forward to form a front frame, and the front frame includes a front upper frame with a horizontal upper end, a front left frame with a vertical left end, and a front right frame with a vertical right end;

[0041] A left limiting piece extends from the left end of the front upper frame, and a right limiting piece extends from the right end of the front upper frame; a left limiting groove is arranged on the front surface of the top end of the front left upright column, and a right limiting groove is arranged on the front surface of the top end of the front right upright column; the left limiting piece is inserted into the left limiting groove from the front to the rear, and the right limiting piece is inserted into the right limiting groove from the front to the rear;

[0042] On the right side of the top of the front left column, there is a first front left lock hole; at the top of the front left frame, there is a second front left lock hole horizontally communicating with the first front left lock hole; at the bottom left of the front upper frame, there is a vertical front left lock fixture fixing plate, and on the front left lock fixture fixing plate, there is a third front left lock hole horizontally communicating with the second front left lock hole;

[0043] The front left lock fixture includes a front left lock fixture upper lock rod and a front left lock fixture lower lock rod vertically connected at the ends; the front left lock fixture upper lock rod passes through the third front left lock hole and the second front left lock hole from right to left in sequence and is embedded in the first front left lock hole; on the side wall of the front left lock fixture upper lock rod, there is a protruding front left lock fixture boss, and between the front left lock fixture boss and the front left lock fixture fixing plate, there is a front left spring;

[0044] On the left side of the top of the front right column, there is a first front right lock hole; at the top of the front right frame, there is a second front right lock hole horizontally communicating with the first front right lock hole; at the bottom right of the front upper frame, there is a vertical front right lock fixture fixing plate; on the front right lock fixture fixing plate, there is a third front right lock hole horizontally communicating with the second front right lock hole;

[0045] The front right lock fixture includes a front right lock fixture upper lock rod and a front right lock fixture lower lock rod vertically connected at the ends; the front right lock fixture upper lock rod passes through the third front right lock hole and the second front right lock hole from left to right in sequence and is embedded in the first front right lock hole; on the side wall of the front right lock fixture upper lock rod, there is a front right lock fixture boss, and between the front right lock fixture boss and the front right lock fixture fixing plate, there is a front right spring;

[0046] At the bottom of the front left column, there is a front left fitting body, and the front left fitting body is embedded in the front left fixing groove;

[0047] At the bottom of the front right column, there is a front right fitting body, and the front right fitting body is embedded in the front right fixing groove;

[0048] The front left fixing groove includes a front left bottom plate, a front left left side plate vertically connected to the left side of the front left bottom plate, a front left right side plate vertically connected to the right side of the front left bottom plate, and a front left front side plate vertically connected to the front side of the front left bottom plate; on the right side surface of the front left left side plate, there is a vertical front left sliding groove, the top width of the front left sliding groove is d1, the middle width of the front left sliding groove is d2, and the bottom width of the front left sliding groove is d3;

[0049] On the top of the left side surface of the front left fitting body, there is a protruding front left top boss, and the top of the front left top boss is connected to the bottom surface of the front left column; on the bottom of the left side surface of the front left fitting body, there is a protruding front left bottom boss; the width of the front left top boss in the front and back direction is d1; the front left bottom boss is a short cylinder with a small corner cut off by a front left cutting inclined plane and a diameter of d5; the maximum width of the front left bottom boss in the direction perpendicular to the front left cutting inclined plane is d1, and the maximum width of the front left bottom boss in the front and back direction is d4;

[0050] When the current left fitting is inserted into the front left fixing groove, the front left bottom boss is located at the bottom of the front left sliding groove, and the front left top boss is inserted into the top of the front left sliding groove;

[0051] The front right fixing groove includes a front right bottom plate, a front right right side plate vertically connected to the right side of the front right bottom plate, a front right left side plate vertically connected to the left side of the front right bottom plate, and a front right front side plate vertically connected to the front side of the front right bottom plate; a vertical front right sliding groove is formed on the left side surface of the front right right side plate, the top width of the front right sliding groove is d1, the middle width of the front right sliding groove is d2, and the bottom width of the front right sliding groove is d3;

[0052] A front right top boss protrudes from the top of the right side surface of the front right fitting, and the top end of the front right top boss is connected to the bottom surface of the front right upright post; a front right bottom boss protrudes from the bottom of the right side surface of the front right fitting; the width of the front right top boss in the front-rear direction is d1; the front right bottom boss is a short cylinder with a small corner cut off by a front right cutting inclined plane and a diameter of d5; the maximum width of the front right bottom boss in the direction perpendicular to the front right cutting inclined plane is d1, and the maximum width of the front right bottom boss in the front-rear direction is d4;

[0053] When the front right fitting is inserted into the front right fixing groove, the front right bottom boss is located at the bottom of the front right sliding groove, and the front right top boss is inserted into the top of the front right sliding groove;

[0054] A horizontal front lower fitting strip is connected between the front left fixing groove and the front right fixing groove, and a front upper fitting strip is connected between the bottom ends of the front left upright post and the front right upright post; a front lower fitting protrusion is vertically upward arranged on the front side of the top surface of the front lower fitting strip, and a front upper fitting depression is arranged on the front side of the bottom surface of the front upper fitting strip;

[0055] When the current left fitting is inserted into the front left fixing groove and the front right fitting is inserted into the front right fixing groove, the front lower fitting protrusion is fitted into the front upper fitting depression;

[0056] A front door fan fixing strip is arranged at the bottom of the front door fan, and a protruding strip arranged at the top of the front upper fitting strip is inserted into a recessed strip arranged at the bottom of the front door fan fixing strip;

[0057] The left door includes a left door fan, a first left connecting sleeve is arranged at the bottom end of the left door fan, a second left connecting sleeve is arranged at the left edge of the chassis, and the first left connecting sleeve and the second left connecting sleeve are axially communicated and then hinged by a left pin shaft;

[0058] The edge of the left door fan protrudes leftward to form a left frame, and the left frame includes a left upper frame that is horizontal in the upper part, a left rear frame that is vertical in the rear side, and a left front frame that is vertical in the front side;

[0059] A first left rear lock hole is formed on the front side of the top of the rear left upright column, and a first left front lock hole is formed on the rear side of the top of the front left upright column; a second left rear lock hole is formed on the top of the left rear frame and is horizontally connected to the first left rear lock hole, and a second left front lock hole is formed on the top of the left front frame and is horizontally connected to the first left front lock hole;

[0060] A vertical left rear lock fixing plate is connected to the bottom rear end of the left upper frame, and a vertical left front lock fixing plate is connected to the bottom front front end of the left upper frame; a third left rear lock hole is formed on the left rear lock fixing plate and is horizontally connected to the second left rear lock hole; a third left front lock hole is formed on the left front lock fixing plate and is horizontally connected to the second left front lock hole;

[0061] The left rear lock comprises an upper locking rod and a lower locking rod of the left rear lock, the ends of which are vertically connected; the rear end surface of the upper locking rod of the left rear lock is a sliding inclined surface;

[0062] The locking rod of the left rear lock passes through the third left rear lock hole and the second left rear lock hole from front to back, and then is embedded in the first left rear lock hole; a protruding left rear lock boss is provided on the side wall of the locking rod of the left rear lock, and a left rear spring is provided between the left rear lock boss and the left rear lock fixing plate;

[0063] The left front lock comprises an upper locking rod and a lower locking rod of the left front lock, the ends of which are vertically connected; the front end surface of the upper locking rod of the left front lock is a sliding inclined surface;

[0064] The locking rod of the left front lock passes through the third left front lock hole and the second left front lock hole from back to front, and then is embedded in the first left front lock hole; a left front lock boss is provided on the side wall of the locking rod of the left front lock, and a left front spring is provided between the left front lock boss and the left front lock fixing plate;

[0065] A vertical rear left limit plate is also fixed to the front side of the left end of the rear left pillar, a vertical front left limit plate is also fixed to the rear side of the left end of the front left pillar, and a left door limit plate vertically connected to the left edge of the chassis is also provided on the left side of the second left connecting sleeve;

[0066] The left door leaf is limited to the right side of the rear left limit plate, the front left limit plate and the left door limit plate;

[0067] A rear left limiting opening is provided on the rear left limiting plate, and a rear left protruding block is provided on the left side of the left rear frame, and the rear left protruding block is embedded in the rear left limiting opening from right to left;

[0068] A front left limiting opening is provided on the front left limiting plate, and a front left protruding block is provided on the left side of the left front frame, and the front left protruding block is embedded in the front left limiting opening from right to left;

[0069] The right door includes a right door leaf. A first right connecting sleeve is provided at the bottom end of the right door leaf, and a second right connecting sleeve is provided at the right edge of the chassis. After the first right connecting sleeve and the second right connecting sleeve are axially communicated, they are hinged by a right pin shaft.

[0070] The edge of the right door leaf protrudes rightward to form a right frame, which includes a horizontally upper right frame, a vertically rear right frame at the rear side, and a vertically front right frame at the front side.

[0071] On the front side of the top of the rear right vertical column, a first right rear lock hole is provided; on the rear side of the top of the front right vertical column, a first right front lock hole is provided; at the top end of the rear right frame, a second right rear lock hole horizontally communicating with the first right rear lock hole is provided; at the top end of the front right frame, a second right front lock hole horizontally communicating with the first right front lock hole is provided.

[0072] At the bottom end of the rear part of the upper right frame, a vertical right rear lock fixture fixing plate is connected; at the bottom end of the front part of the upper right frame, a vertical right front lock fixture fixing plate is connected; on the right rear lock fixture fixing plate, a third right rear lock hole horizontally communicating with the second right rear lock hole is provided; on the right front lock fixture fixing plate, a third right front lock hole horizontally communicating with the second right front lock hole is provided.

[0073] The right rear lock includes a right rear lock upper lock rod and a right rear lock lower lock rod vertically connected at the end; the rear end face of the right rear lock upper lock rod is a sliding inclined plane.

[0074] The right rear lock upper lock rod sequentially passes through the third right rear lock hole and the second right rear lock hole from front to back and then is embedded in the first right rear lock hole; on the side wall of the right rear lock upper lock rod, a protruding right rear lock boss is provided, and a right rear spring is provided between the right rear lock boss and the right rear lock fixture fixing plate.

[0075] The right front lock includes a right front lock upper lock rod and a right front lock lower lock rod vertically connected at the end; the front end face of the right front lock upper lock rod is a sliding inclined plane.

[0076] The right front lock upper lock rod sequentially passes through the third right front lock hole and the second right front lock hole from back to front and then is embedded in the first right front lock hole; on the side wall of the right front lock upper lock rod, a right front lock boss is provided, and a right front spring is provided between the right front lock boss and the right front lock fixture fixing plate.

[0077] On the front side of the right end of the rear right vertical column, a vertical rear right limiting plate is further fixed; on the rear side of the right end of the front right vertical column, a vertical front right limiting plate is further fixed; on the right side of the second right connecting sleeve, a right door limiting plate vertically connected to the right edge of the chassis is further provided; the right door leaf is limited to the left side of the rear right limiting plate, the front right limiting plate and the right door limiting plate.

[0078] The rear right limit plate is provided with a rear right limit opening, and a rear right protruding block is protrudingly arranged on the right side surface of the rear right frame. The rear right protruding block is inserted into the rear right limit opening from left to right; the front right limit plate is provided with a front right limit opening, and a front right protruding block is protrudingly arranged on the right side surface of the front right frame. The front right protruding block is inserted into the front right limit opening from left to right;

[0079] The top edges of the front door leaf, rear door leaf, left door leaf and right door leaf are all located on the same horizontal plane; the tops of the rear left column, rear right column, front left column and front right column are all higher than the horizontal plane and are provided with first stacking grooves on the upper surfaces of the tops; the chassis is further fixed with stacking positioning blocks below each fixing groove; a second stacking groove is provided on the bottom surface of each stacking positioning block, and a stacking protruding block that is vertically aligned with the first stacking groove is provided at each second stacking groove; a fixing groove stacking protrusion that is vertically aligned with the second stacking groove is further provided at the top of each fixing groove.

[0080] One end of the left pin shaft is tightly fixed in the first left connecting sleeve through the left pin shaft boss, and the other end is slidably arranged in the second left connecting sleeve.

[0081] One end of the right pin shaft is tightly fixed in the first right connecting sleeve through the right pin shaft boss, and the other end is slidably arranged in the second right connecting sleeve.

[0082] A protruding rear left limit protruding block is provided at the bottom of the rear surface of the left door leaf; a protruding front left limit protruding block is provided at the bottom of the front surface of the left door leaf.

[0083] A protruding rear right limit protruding block is provided at the bottom of the rear surface of the right door leaf; a protruding front right limit protruding block is provided at the bottom of the front surface of the right door leaf.

[0084] The advantages of all the above technical solutions over the prior art are as follows:

[0085] 1. Convenient folding:

[0086] For the left and right doors, as long as the left and right door locks are pulled inward, the left and right doors can be laid down in the box by rotation. The pin shaft is designed with special functions. The pin shaft penetrates into two coaxial sleeves of the left and right doors and the chassis. The design feature is that at the position where the pin shaft penetrates into one of the sleeves, two groups of vertical bosses are punched out, with two bosses in each group. During installation, the pin shaft is inserted from one end, and the front end without bosses can smoothly enter. When the rear end reaches the boss position, it has an interference fit relationship with the sleeve, that is, one sleeve is locally deformed and expanded after being squeezed by the bosses, so as to achieve a reverse stop effect. This hinge has the characteristics of ingenious structure, simple installation, firm connection, convenient disassembly and convenient maintenance.

[0087] For the front and rear doors, the front and rear doors can be laid down inside the box by slightly lifting them. Generally, the chimeras at the bottoms of the front and rear doors are not easily detached from the fixing grooves, thus preventing accidental detachment under normal circumstances. However, by rotating the chimeras to a specific angle, the front and rear doors can also be detached from the chassis, enabling maintenance of the front and rear doors. In short, the front and rear doors can be upright, laid down, abducted and obliquely erected, and even removed from the chassis, facilitating loading, unloading and maintenance.

[0088] 2. The lock is fixed conveniently and effectively:

[0089] Limit pieces (left limit piece and right limit piece) are provided beside the lock of the front door leaf. The limit pieces are limited by the upright posts, thus preventing the front door leaf from falling into the box after the lock is opened and scratching the interiors of the left and right doors.

[0090] Sliding inclined planes are provided on the end faces of the locks of the left and right doors. Thus, when lifting and fixing, self-locking to the upright posts can be achieved through the sliding inclined planes without manually pulling the locks; in addition, the locks on the upper parts of the left and right doors are spring locks, and the natural state is the locked state, that is, the ends of the locks will extend a certain distance. Usually, when the locks are in the locked state, the ends of the locks extend into the upright posts. Due to the spring relationship, even after the left and right doors are opened and the hands are released, the locks will also extend under the action of the springs. At this time, if there is a misoperation and the left and right doors are buckled inward, the inner panels of the front and rear doors will be scratched or even torn. The present invention is provided with limit protruding blocks at the bottoms of the two side faces of the left and right door leaves, thus separating the left and right door leaves from the front and rear doors by a certain distance, so that the protruding locks of the left and right door leaves cannot reach the inner walls of the front and rear doors, achieving the purpose of avoiding scratches.

[0091] 3. The front door leaf can be opened:

[0092] In the upright state, sometimes it is necessary to open the front door leaf to put in or take out goods or observe the interior, etc. In the present invention, it is not necessary to remove the entire front door. As long as the lock of the front door leaf is pulled inward, and then the front door leaf is lifted or slightly rotated and then lifted, the front door leaf can be detached. In the loaded state, due to the soft body sagging property of raw materials such as rubber, after the goods are stored for a period of time, they squeeze the chassis and the four walls. In the tensioned state, the front door lock can be opened. Since the bottom of the front door leaf has a rotatable meshing relationship, the front door leaf can also be rotated outward by using the tension force to facilitate smooth removal, realizing manual or robotic free picking of goods. At this time, the other three sides are still in the locked state.

[0093] 4. Double stacking control and double stacking design are another highlight of this type of folding metal box.

[0094] When the box is folded empty, stacking is achieved through the cooperation of the stacking positioning block at the bottom of the chassis and the top of the fixed groove. The two vertical inclined surfaces of the second stacking groove fit tightly with the two side surfaces at the top of the fixed groove and provide bidirectional positioning, enabling stacking. Due to the inclined surface connection, the docking space is large, and after falling, the gap is small, completely overcoming the disadvantage of loose layers.

[0095] When loading and dropping items, the stability of the folding boxes is crucial due to the heavy load and the weight of the folding boxes. Between each pair of stacked folding boxes, the first stacking groove at the top of the column of the lower box is equipped with a slanted trapezoidal mating surface that mates with the stacking protrusions of the upper box's chassis foot. Simultaneously, the top of the column is designed as a convex rectangular frame corresponding to the two perpendicular slopes of the second stacking groove, thereby adding another level of fit, making the folding more stable and secure when dropped under heavy loads. Furthermore, the stacking unit of this invention is large in scale, with a clear target point during stacking and high recognition for forklift operators, solving a long-standing problem that has troubled many customers for years.

[0096] In summary, the product of the present invention adopts a variety of modern processing technologies as a whole, and its appearance is neat, bright, beautiful and atmospheric. Each hinge point adopts a precision casting process, and is engaged and docked by sliding, rotating, snapping, etc. The lock is unique, compact in structure, and automatically rebounds and self-locks. The stability and safety performance during the transportation process are greatly enhanced. The frames of each component are made of high-strength materials, and the load-bearing capacity is further enhanced. The engagement between the components is made of special special-shaped tubes, with clear edges and corners, neat meshing, and proper overall coordination. It is a brand-new warehousing and transportation product. BRIEF DESCRIPTION OF THE DRAWINGS

[0097] Figure 1 is a perspective view from the left front toward the present invention;

[0098] Figure 2 is a perspective view from the left rear toward the present invention;

[0099] Figure 3 is a perspective view from the right rear toward the present invention;

[0100] Figure 4 is a perspective view from the front right toward the present invention;

[0101] Figure 5 yes Figure 4 Enlarged view of box A;

[0102] Figure 6 is a bottom perspective view of the present invention;

[0103] Figure 7 yes Figure 6 Enlarged view of box B;

[0104] Figure 8 is a perspective view of the chassis of the present invention facing from the right front;

[0105] Figure 9 is Figure 8 an enlarged view of the square box C;

[0106] Figure 10 is a perspective view of the chassis of the present invention facing from the right rear;

[0107] Figure 11 is Figure 10 an enlarged view of the square box D;

[0108] Figure 12 is a rear view of the rear door of the present invention;

[0109] Figure 13 is a right view of the rear door of the present invention;

[0110] Figure 14 is a left view of the rear door of the present invention;

[0111] Figure 15 is a front view of the front door of the present invention;

[0112] Figure 16 is Figure 15 an enlarged view of the square box E;

[0113] Figure 17 is Figure 15 an enlarged view of the square box F;

[0114] Figure 18 is a left view of the front door of the present invention;

[0115] Figure 19 is Figure 18 an enlarged view of the square box G;

[0116] Figure 20 is a right view of the front door of the present invention;

[0117] Figure 21 is Figure 20 an enlarged view of the square box H;

[0118] Figure 22 is a perspective view of the front door of the present invention;

[0119] Figure 23 is a left view of the left door of the present invention;

[0120] Figure 24 is a front view of the left door of the present invention;

[0121] Figure 25 is a top view of the left door of the present invention;

[0122] Figure 26 is Figure 25Enlarged view of box J;

[0123] Figure 27 Schematic diagram of the process of the front left bottom boss of the present invention being inserted into the front left chute;

[0124] ⏎ Schematic diagram of the front left chimeric body of the present invention being fixed in the front left fixing groove;

[0125] Figure 28 is Figure 29 Enlarged view of box K in;

[0126] Figure 28 Schematic diagram of the front left chimeric body and the front left upright post of the present invention after falling down and folding together;

[0127] Figure 30 Schematic diagram of the front left chimeric body of the present invention being unable to be vertically pulled out;

[0128] Figure 31 Schematic diagram of the present invention in a stacked state in the folded state;

[0129] Figure 32 Schematic diagram of the present invention in a stacked state in the storage state;

[0130] Figure 33 Schematic diagram of the connection process of the left pin shaft of the present invention to the first left connecting sleeve and the second left connecting sleeve.

[0131] In the figure:

[0132] 1, front door, 2, left door, 3, right door, 4, rear door, 5, chassis;

[0133] 111, front left upright post, 112, front right upright post, 121, front left frame, 122, front right frame, 13, front upper frame, 131, left limit piece, 132, right limit piece, 133, front door panel, 141, front left lock fixing plate, 1411, front left spring, 1412, front left lock boss, 1413, front left lock upper locking rod, 142, front right lock fixing plate, 1421, front right spring, 1422, front right lock boss, 1423, front right lock upper locking rod, 151, front left chimeric body, 1511, front left top boss, 1512, front left bottom boss, 1521, front right top boss, 1522, front right bottom boss, 152, front right chimeric body, 161, front left limit plate, 162, front right limit plate, 171, front left limit opening, 172, front right limit opening, 18, front door panel fixing strip, 19, front upper chimeric strip;

[0134] 221. Left rear border, 222. Left front border, 23. Upper left border, 231. Left door leaf, 251. Upper locking rod of left rear lock, 252. Upper locking rod of left front lock, 261. Rear left protruding block, 262. Front left protruding block, 271. Left rear spring, 272. Left front spring, 28. First left connecting sleeve, 29. Rear left limiting protruding block;

[0135] 411. Rear left column, 412. Rear right column, 451. Rear left fitting, 452. Rear right fitting, 461. Rear left limiting plate, 462. Rear right limiting plate, 49. Rear upper fitting strip;

[0136] 51. Front left fixing groove, 511. Front left bottom plate, 512. Front left left side plate, 513. Front left front side plate, 514. Front left right side plate, 515. Front left sliding groove, 52. Front right fixing groove, 53. Rear left fixing groove, 531. Rear left bottom plate, 532. Rear left left side plate, 533. Rear left rear side plate, 534. Rear left right side plate, 535. Rear left sliding groove, 54. Rear right fixing groove, 55. Second left connecting sleeve, 56. Left door limiting plate, 57. Right door limiting plate, 58. Front lower fitting strip, 59. Rear lower fitting strip;

[0137] 6. Stacking positioning block, 61. First stacking groove, 62. Second stacking groove, 63. Stacking protruding block, 64. Fixed groove stacking protrusion. Detailed implementation mode

[0138] The following describes the detailed implementation mode of the present invention in conjunction with the attached drawings.

[0139] As Figure 34 shown, the overall solution of the present invention includes a chassis 5 and a front door 1, a rear door 4, a left door 2 and a right door 3 that are respectively vertically connected to the four sides of the chassis 5;

[0140] Fixing grooves are provided at the four corners of the chassis 5, namely the rear left fixing groove 53, the rear right fixing groove 54, the front left fixing groove 51 and the front right fixing groove 52;

[0141] The rear door 4 includes a rear left column 411, a rear right column 412, and a rear door leaf fixed between the rear left column 411 and the rear right column 412;

[0142] A rear left fitting 451 is connected to the bottom of the rear left column 411, and the rear left fitting 451 is embedded in the rear left fixing groove 53;

[0143] A rear right fitting 452 is connected to the bottom of the rear right column 412, and the rear right fitting 452 is embedded in the rear right fixing groove 54;

[0144] The rear left fixing groove 53 includes a rear left bottom plate 531, a rear left left side plate 532 vertically connected to the left side of the rear left bottom plate 531, a rear left right side plate 534 vertically connected to the right side of the rear left bottom plate 531, and a rear left rear side plate 533 vertically connected to the rear side of the rear left bottom plate 531; a vertical rear left sliding groove 535 is formed on the right side surface of the rear left left side plate 532, the top width of the rear left sliding groove 535 is d1, the middle width of the rear left sliding groove 535 is d2, and the bottom width of the rear left sliding groove 535 is d3;

[0145] A rear left top boss is protrudingly provided at the top of the left side surface of the rear left fitting body 451, and the top end of the rear left top boss is connected to the bottom surface of the rear left upright post 411; a rear left bottom boss is protrudingly provided at the bottom of the left side surface of the rear left fitting body 451; the width of the rear left top boss in the front-rear direction is d1; the rear left bottom boss is a short cylinder with a small corner cut off by a rear left cutting inclined plane and a diameter of d5; the maximum width of the rear left bottom boss in the direction perpendicular to the rear left cutting inclined plane is d1, and the maximum width of the rear left bottom boss in the front-rear direction is d4;

[0146] d1, d2, d3, d4, and d5 satisfy the following formula: d1 < d4 ≤ d5 ≤ d3 < d2;

[0147] When the rear left fitting body 451 is embedded in the rear left fixing groove 53, the rear left bottom boss is located at the bottom of the rear left sliding groove 535, and the rear left top boss is embedded in the top of the rear left sliding groove 535;

[0148] The rear right fixing groove 54 includes a rear right bottom plate, a rear right right side plate vertically connected to the right side of the rear right bottom plate, a rear right left side plate vertically connected to the left side of the rear right bottom plate, and a rear right rear side plate vertically connected to the rear side of the rear right bottom plate; a vertical rear right sliding groove is formed on the left side surface of the rear right right side plate, the top width of the rear right sliding groove is d1, the middle width of the rear right sliding groove is d2, and the bottom width of the rear right sliding groove is d3;

[0149] A rear right top boss is protrudingly provided at the top of the right side surface of the rear right fitting body 452, and the top end of the rear right top boss is connected to the bottom surface of the rear right upright post 412; a rear right bottom boss is protrudingly provided at the bottom of the right side surface of the rear right fitting body 452; the width of the rear right top boss in the front-rear direction is d1; the rear right bottom boss is a short cylinder with a small corner cut off by a rear right cutting inclined plane and a diameter of d5; the maximum width of the rear right bottom boss in the direction perpendicular to the rear right cutting inclined plane is d1, and the maximum width of the rear right bottom boss in the front-rear direction is d4;

[0150] When the rear right fitting body 452 is embedded in the rear right fixing groove 54, the rear right bottom boss is located at the bottom of the rear right sliding groove, and the rear right top boss is embedded in the top of the rear right sliding groove;

[0151] A horizontal rear lower fitting strip 59 is connected between a rear left fixing groove 53 and a rear right fixing groove 54, and a rear upper fitting strip 49 is fixed to the bottom of the rear door panel; a rear lower fitting protrusion is vertically upwardly provided at the rear side of the top surface of the rear lower fitting strip 59, and a rear upper fitting recess is provided at the rear side of the bottom surface of the rear upper fitting strip 49;

[0152] When a rear left fitting body 451 is fitted into the rear left fixing groove 53 and a rear right fitting body 452 is fitted into the rear right fixing groove 54, the rear lower fitting protrusion is fitted into the rear upper fitting recess;

[0153] The front door 1 includes a front left vertical column 111, a front right vertical column 112, and a front door panel 133 located between the front left vertical column 111 and the front right vertical column 112; the edge of the front door panel 133 protrudes forward to form a front border, and the front border includes a front upper border 13 with a horizontal upper end, a front left border 121 with a vertical left end, and a front right border 122 with a vertical right end;

[0154] A left limiting piece 131 extends from the left end of the front upper border 13, and a right limiting piece 132 extends from the right end of the front upper border 13; a left limiting groove is provided on the front surface of the top end of the front left vertical column 111, and a right limiting groove is provided on the front surface of the top end of the front right vertical column 112; the left limiting piece 131 is fitted into the left limiting groove from front to back, and the right limiting piece 132 is fitted into the right limiting groove from front to back;

[0155] A first front left lock hole is provided on the right side surface of the top of the front left vertical column 111; a second front left lock hole horizontally communicating with the first front left lock hole is provided at the top end of the front left border 121; a vertical front left lock fixture fixing plate 141 is connected to the bottom end of the left part of the front upper border 13, and a third front left lock hole horizontally communicating with the second front left lock hole is provided on the front left lock fixture fixing plate 141;

[0156] The front left lock fixture includes a front left lock fixture upper lock rod 1413 and a front left lock fixture lower lock rod vertically connected at the end; the front left lock fixture upper lock rod 1413 sequentially passes through the third front left lock hole and the second front left lock hole from right to left and then is fitted into the first front left lock hole; a protruding front left lock fixture boss 1412 is provided on the side wall of the front left lock fixture upper lock rod 1413, and a front left spring 1411 is provided between the front left lock fixture boss 1412 and the front left lock fixture fixing plate 141;

[0157] A first front right lock hole is provided on the left side surface of the top of the front right vertical column 112; a second front right lock hole horizontally communicating with the first front right lock hole is provided at the top end of the front right border 122; a vertical front right lock fixture fixing plate 142 is connected to the bottom end of the right part of the front upper border 13; a third front right lock hole horizontally communicating with the second front right lock hole is provided on the front right lock fixture fixing plate 142;

[0158] The front right lock includes a front right upper lock rod 1423 and a front right lower lock rod which are vertically connected at the end; the front right upper lock rod 1423 passes through the third front right lock hole and the second front right lock hole from left to right in sequence and is then embedded in the first front right lock hole; a front right lock boss 1422 is provided on the side wall of the front right upper lock rod 1423, and a front right spring 1421 is provided between the front right lock boss 1422 and the front right lock fixing plate 142;

[0159] A front left fitting 151 is connected to the bottom of the front left column 111, and the front left fitting 151 is embedded in the front left fixing groove 51;

[0160] A front right fitting 152 is connected to the bottom of the front right column 112, and the front right fitting 152 is embedded in the front right fixing groove 52;

[0161] The front left fixing groove 51 includes a front left bottom plate 511, a front left left side plate 512 vertically connected to the left side of the front left bottom plate 511, a front left right side plate 514 vertically connected to the right side of the front left bottom plate 511, and a front left front side plate 513 vertically connected to the front side of the front left bottom plate 511; a vertical front left sliding groove 515 is provided on the right side surface of the front left left side plate 512, the top width of the front left sliding groove 515 is d1, the middle width of the front left sliding groove 515 is d2, and the bottom width of the front left sliding groove 515 is d3;

[0162] A front left top boss 1511 protrudes from the top of the left side surface of the front left fitting 151, and the top end of the front left top boss 1511 is connected to the bottom surface of the front left column 111; a front left bottom boss 1512 protrudes from the bottom of the left side surface of the front left fitting 151; the width of the front left top boss 1511 in the front and rear directions is d1; the front left bottom boss 1512 is a short cylinder with a small corner cut off by a front left cutting inclined plane and a diameter of d5; the maximum width of the front left bottom boss 1512 in the direction perpendicular to the front left cutting inclined plane is d1, and the maximum width of the front left bottom boss 1512 in the front and rear directions is d4;

[0163] When the front left fitting 151 is embedded in the front left fixing groove 51, the front left bottom boss 1512 is located at the bottom of the front left sliding groove 515, and the front left top boss 1511 is embedded in the top of the front left sliding groove 515;

[0164] The right fixing groove 52 includes a front right bottom plate, a front right right side plate vertically connected to the right side of the front right bottom plate, a front right left side plate vertically connected to the left side of the front right bottom plate, and a front right front side plate vertically connected to the front side of the front right bottom plate; a vertical front right sliding groove is provided on the left side surface of the front right right side plate, the top width of the front right sliding groove is d1, the middle width of the front right sliding groove is d2, and the bottom width of the front right sliding groove is d3;

[0165] On the top of the right side surface of the front right fitting body 152, a front right top boss 1521 is protrudingly provided, and the top end of the front right top boss 1521 is connected to the bottom surface of the front right upright column 112; on the bottom of the right side surface of the front right fitting body 152, a front right bottom boss 1522 is protrudingly provided; the width of the front right top boss 1521 in the front-rear direction is d1; the front right bottom boss 1522 is a short cylinder with a small corner cut off by a front right cutting inclined plane and a diameter of d5; the maximum width of the front right bottom boss 1522 in the direction perpendicular to the front right cutting inclined plane is d1, and the maximum width of the front right bottom boss 1522 in the front-rear direction is d4;

[0166] When the front right fitting body 152 is embedded in the front right fixing groove 52, the front right bottom boss 1522 is located at the bottom of the front right sliding groove, and the front right top boss 1521 is embedded in the top of the front right sliding groove;

[0167] A horizontal front lower fitting strip 58 is connected between the front left fixing groove 51 and the front right fixing groove 52, and a front upper fitting strip 19 is connected between the bottom ends of the front left upright column 111 and the front right upright column 112; on the front side of the top surface of the front lower fitting strip 58, a front lower fitting protrusion is vertically upward provided, and on the front side of the bottom surface of the front upper fitting strip 19, a front upper fitting recess is provided;

[0168] When the front left fitting body 151 is embedded in the front left fixing groove 51 and the front right fitting body 152 is embedded in the front right fixing groove 52, the front lower fitting protrusion is fitted in the front upper fitting recess;

[0169] At the bottom of the front door panel 133, a front door panel fixing strip 18 is provided, and the protruding strip provided on the top of the front upper fitting strip 19 is embedded in the recessed strip provided at the bottom of the front door panel fixing strip 18;

[0170] The left door 2 includes a left door panel 231. At the bottom end of the left door panel 231, a first left connecting sleeve 28 is provided. On the left edge of the chassis 5, a second left connecting sleeve 55 is provided. After the first left connecting sleeve 28 and the second left connecting sleeve 55 are axially communicated, they are hinged by a left pin shaft;

[0171] The edge of the left door panel 231 protrudes leftward to form a left frame. The left frame includes a horizontally upper left upper frame 23, a vertically rear left rear frame 221, and a vertically front left front frame 222;

[0172] On the front side of the top of the rear left upright column 411, a first left rear lock hole is opened. On the rear side of the top of the front left upright column 111, a first left front lock hole is opened; at the top end of the left rear frame 221, a second left rear lock hole horizontally communicated with the first left rear lock hole is opened. At the top end of the left front frame 222, a second left front lock hole horizontally communicated with the first left front lock hole is opened;

[0173] At the bottom rear end of the upper left frame 23, there is a vertical left rear lock fixing plate connected, and at the bottom front end of the upper left frame 23, there is a vertical left front lock fixing plate connected; on the left rear lock fixing plate, there is a third left rear lock hole horizontally communicating with the second left rear lock hole; on the left front lock fixing plate, there is a third left front lock hole horizontally communicating with the second left front lock hole;

[0174] The left rear lock includes a left rear lock upper lock rod 251 and a left rear lock lower lock rod vertically connected at the ends; the rear end face of the left rear lock upper lock rod 251 is a sliding inclined plane;

[0175] The left rear lock upper lock rod 251 passes through the third left rear lock hole and the second left rear lock hole from front to back in sequence and then is embedded in the first left rear lock hole; on the side wall of the left rear lock upper lock rod 251, there is a protruding left rear lock boss, and between the left rear lock boss and the left rear lock fixing plate, there is a left rear spring 271;

[0176] The left front lock includes a left front lock upper lock rod 252 and a left front lock lower lock rod vertically connected at the ends; the front end face of the left front lock upper lock rod 252 is a sliding inclined plane;[[ID=?]]

[0177] The left front lock upper lock rod 252 passes through the third left front lock hole and the second left front lock hole from back to front in sequence and then is embedded in the first left front lock hole; on the side wall of the left front lock upper lock rod 252, there is a left front lock boss, and between the left front lock boss and the left front lock fixing plate, there is a left front spring 272;

[0178] On the front side of the left end of the rear left vertical column 411, there is also a vertical rear left limit plate 461 fixed, on the rear side of the left end of the front left vertical column 111, there is also a vertical front left limit plate 161 fixed, and on the left side of the second left connection sleeve 55, there is also a left door limit plate 56 vertically connected to the left edge of the chassis 5;

[0179] The left door leaf 231 is limited to the right side of the rear left limit plate 461, the front left limit plate 161 and the left door limit plate 56;

[0180] On the rear left limit plate 461, there is a rear left limit opening, on the left side surface of the rear left frame 221, there is a protruding rear left protrusion 261, and the rear left protrusion 261 is embedded in the rear left limit opening from right to left;

[0181] On the front left limit plate 161, there is a front left limit opening 171, on the left side surface of the front left frame 222, there is a protruding front left protrusion 262, and the front left protrusion 262 is embedded in the front left limit opening 171 from right to left;

[0182] The right door 3 includes a right door leaf, at the bottom end of the right door leaf, there is a first right connection sleeve, on the right edge of the chassis 5, there is a second right connection sleeve, and after the first right connection sleeve and the second right connection sleeve are axially communicated, they are hinged through a right pin shaft;

[0183] The edge of the right door leaf protrudes rightward to form a right frame, which includes a horizontally upper right upper frame, a vertically rear right rear frame, and a vertically front right front frame;

[0184] On the front side of the top of the rear right vertical column 412, a first right rear lock hole is provided, and on the rear side of the top of the front right vertical column 112, a first right front lock hole is provided; at the top of the right rear frame, a second right rear lock hole horizontally communicating with the first right rear lock hole is provided, and at the top of the right front frame, a second right front lock hole horizontally communicating with the first right front lock hole is provided;

[0185] At the bottom end of the rear part of the right upper frame, a vertical right rear lock fixture fixing plate is connected, and at the bottom end of the front part of the right upper frame, a vertical right front lock fixture fixing plate is connected; on the right rear lock fixture fixing plate, a third right rear lock hole horizontally communicating with the second right rear lock hole is provided; on the right front lock fixture fixing plate, a third right front lock hole horizontally communicating with the second right front lock hole is provided;

[0186] The right rear lock includes a right rear lock upper lock rod and a right rear lock lower lock rod vertically connected at the end; the rear end face of the right rear lock upper lock rod is a sliding inclined plane;

[0187] The right rear lock upper lock rod passes through the third right rear lock hole and the second right rear lock hole from front to back and then is embedded in the first right rear lock hole; on the side wall of the right rear lock upper lock rod, a protruding right rear lock boss is provided, and a right rear spring is provided between the right rear lock boss and the right rear lock fixture fixing plate;

[0188] The right front lock includes a right front lock upper lock rod and a right front lock lower lock rod vertically connected at the end; the front end face of the right front lock upper lock rod is a sliding inclined plane;

[0189] The right front lock upper lock rod passes through the third right front lock hole and the second right front lock hole from back to front and then is embedded in the first right front lock hole; on the side wall of the right front lock upper lock rod, a right front lock boss is provided, and a right front spring is provided between the right front lock boss and the right front lock fixture fixing plate;

[0190] On the front right side of the right end of the rear right vertical column 412, a vertical rear right limit plate 462 is further fixed, on the rear right side of the right end of the front right vertical column 112, a vertical front right limit plate 162 is further fixed, and on the right side of the second right connection sleeve, a right door limit plate 57 vertically connected to the right edge of the chassis 5 is further provided; the right door leaf is limited to the left side of the rear right limit plate 462, the front right limit plate 162, and the right door limit plate 57;

[0191] On the rear right limit plate 462, a rear right limit opening is provided, on the right side surface of the right rear frame, a rear right protruding block is protruding, and the rear right protruding block is embedded in the rear right limit opening from left to right; on the front right limit plate 162, a front right limit opening 172 is provided, on the right side surface of the right front frame, a front right protruding block is protruding, and the front right protruding block is embedded in the front right limit opening 172 from left to right;

[0192] At the bottom of the rear surface of the left door leaf 231, a protruding rear left limit protruding block 29 is provided; at the bottom of the front surface of the left door leaf 231, a protruding front left limit protruding block is provided.

[0193] At the bottom of the rear surface of the right door leaf, a protruding rear right limit protruding block is provided; at the bottom of the front surface of the right door leaf, a protruding front right limit protruding block is provided.

[0194] By using the above-mentioned protruding blocks, a certain distance can be separated between the left and right doors and the front and rear doors, preventing the locks of the left and right doors from scratching the inner walls of the front and rear doors when the left and right doors are buckled inward.

[0195] The top edges of the front door leaf 133, the rear door leaf, the left door leaf 231, and the right door leaf are all located on the same horizontal plane; the tops of the rear left upright column 411, the rear right upright column 412, the front left upright column 111, and the front right upright column 112 are all higher than the horizontal plane and a first stacking groove 61 is provided on the upper surface of the top; the chassis 5 is also fixed with a stacking positioning block 6 below each fixing groove; a second stacking groove 62 is provided on the bottom surface of each stacking positioning block 6, and a stacking protruding block 63 that is vertically aligned with the first stacking groove 61 is provided at each second stacking groove 62; a fixing groove stacking protrusion 64 that is vertically aligned with the second stacking groove 62 is also provided on the top of each fixing groove.

[0196] The two fixing grooves located at the rear (the rear left fixing groove 53 and the rear right fixing groove 54) are mirror-symmetrical, and the two fixing grooves located at the front (the front left fixing groove 51 and the front right fixing groove 52) are also mirror-symmetrical. The mirror-symmetry planes are all vertical planes facing the left and right directions and passing through the center of the chassis 5;

[0197] The two fixing grooves located on the left (the rear left fixing groove 53 and the front left fixing groove 51) are mirror-symmetrical, and the two fixing grooves located on the right (the rear right fixing groove 54 and the front right fixing groove 52) are also mirror-symmetrical. The mirror-symmetry planes are all vertical planes facing the front and rear directions and passing through the center of the chassis 5;

[0198] Each fitting body (the front left fitting body 151, the front right fitting body 152, the rear left fitting body 451, and the rear right fitting body 452) corresponding to each fixing groove all satisfies the above-mentioned completely identical mirror relationship. In addition, the left door 2 and the right door 3 are also arranged in a mirror-symmetrical manner, and the symmetry plane is a vertical plane facing the front and rear directions and passing through the center of the chassis 5;

[0199] We take the front left fixing groove 51 and the front left fitting body 151 as an example to illustrate their connection and function. The connection of the other three groups of fixing grooves and fitting bodies is completely determined by mirroring:

[0200] Such as Figures 1 to 34As shown, during installation, the front left fitting 151 needs to be rotated by an angle (this angle can be 45°, that is, the angle between the front left fitting 151 and the horizontal plane is 45°) so that an inclined plane cut off from the front left bottom boss 1512 is in the vertical direction. Only when its horizontal width and the top width of the front left sliding groove 515 are both the same length value d1 can the front left bottom boss 1512 be inserted into the front left sliding groove 515. After insertion, the front left bottom boss 1512 enters the middle of the front left sliding groove 515, and then the front left fitting 151 can be rotated. At this time, the front left fitting 151 can be rotated to the vertical direction and continue to move downwards, so that the front left bottom boss 1512 can be inserted into the bottom of the front left sliding groove 515, and the front left top boss 1511 can be inserted into the top of the front left sliding groove 515. At this time, the front left fitting 151 is completely fixed in the front left sliding groove 515, as Figure 27 shown.

[0201] When it is necessary to rotate the front left fitting 151 and the front left upright column 111 connected to its upper part to the lying flat state (at this time, the front door 1 can be laid down), the front left fitting 151 can be lifted so that the front left top boss 1511 is disengaged from the front left sliding groove 515, and then the front left fitting 151 can be rotated until it is horizontal, as Figures 28 to 29 shown.

[0202] Generally, for example, in the vertical case, as Figure 30 shown, the front left fitting 151 is not easily disengaged from the front left fixing groove 51. Only when the angle is adjusted manually so that the inclined plane of the front left bottom boss 1512 is in the vertical direction can it be disengaged. This is determined by the relationship of d1 < d4 ≤ d5 ≤ d3 < d2 mentioned above. Therefore, the accidental disengagement of the front left fitting 151 from the front left fixing groove 51 can be prevented. Using such a connection method, the inward folding of the front door 1 can be realized. When it is necessary to replace the front door 1 due to wear or failure, etc., the front left fitting 151 can be disengaged from the front left fixing groove 51, so that it is convenient to repair or replace parts separately.

[0203] The above is the installation and folding process of the front door 1. The installation and folding process of the rear door 4 is completely determined by symmetry.

[0204] For the entire folding box (logistics box), when folding is required, pull the lock on the left door 2 inward, and the left door 2 can be disengaged from the rear left upright column 411 and the front left upright column 111. Since its bottom is hinged to the chassis 5, it can be rotated and laid down inside the folding box; in exactly the same way, the right door 3 can be laid down inside the folding box; then, after lifting the fittings of the front door 1 and the rear door 4, they can be folded inside the folding box; in this way, the folding of the entire folding box is realized.

[0205] Multiple folded folding boxes can be stacked. Specifically, as Figure 31As shown, the stacking protrusion 63 on the bottom of the upper folding box is inserted into the fixing groove below. Due to the cooperation between the second stacking groove 62 and the stacking protrusion 64 of the fixing groove, a tight stacking can be achieved. The four corners can be stacked separately in the same manner. In addition, this stacking can be repeated to form multiple layers, which can greatly save the storage space of the folding boxes.

[0206] When the folding box of the present invention is needed to store items, the front door 1 and the rear door 4 are first lifted and then installed in the fixed groove, and then the left door 2 is lifted. The left door 2 is limited by the left door limit plate 56, the rear left limit plate 461, and the front left limit plate 161 so as not to turn outward. The rear left protruding block 261 and the front left protruding block 262 are respectively embedded in the rear left limit opening and the front left limit opening 171. At the same time, due to the sliding inclined surface set at the end of the locking rod 251 on the left rear lock and the locking rod 252 on the left front lock, the lock will retreat during the movement through the contact between the sliding inclined surface and the rear left column 411 and the front left column 111, thereby being embedded in the opening set on the column. The configuration of the sliding inclined surface is as follows: Figure 32 The lifting and fixing process of the right door 3 is exactly the same as that of the left door 2.

[0207] When storing items, the front door leaf 133 can be removed separately to facilitate the insertion or removal of objects. Specifically, the lock of the front door 1 is pulled inward to separate the front door leaf 133 from the front left pillar 111 and the front right pillar 112. At this time, the front door leaf 133 is lifted to disengage the front door leaf fixing bar 18 from the front upper engaging bar 19, thereby removing the front door leaf 133. During the above process, due to the provision of the left and right limiting plates 131 and 132, the front door leaf 133 will not fall inward into the folding box, thereby preventing the protruding front left lock upper locking rod 1413 and front right lock upper locking rod 1423 pushed by the spring from scratching the inner surfaces of the left door 2 and the right door 3. When installing the front door leaf 133, the process can be reversed. When the folding box is in the state of storing items, the stacking function can also be achieved. Specifically, one folding box is placed on top of another folding box, and the stacking protrusion 63 of the upper folding box is embedded in the first stacking groove 61 of the lower folding box. The four corners are embedded in this way to achieve stacking. Figure 26 shown.

[0208] Figure 33 Figure 34The figure shows a connection schematic diagram of the first left connecting sleeve 28 and the second left connecting sleeve 55. During installation, forcefully hammer the left pin from left to right into the two sleeves as shown in the figure. The outer diameter of the left pin is slightly smaller than the inner diameters of the first left connecting sleeve 28 and the second left connecting sleeve 55. However, on one side, for example, on the left side in the figure, there is a left pin boss. In this way, the right side of the left pin can smoothly pass through the first left connecting sleeve 28 and enter the second left connecting sleeve 55. By forcefully hammering the left pin, the two left pin bosses can be embedded in the first left connecting sleeve 28 and fixed, thus achieving a hinge connection. The connection between the first left connecting sleeve and the second left connecting sleeve is exactly the same as the above.

[0209] As described above, the above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent substitutions or changes, and should be covered within the protection scope of the present invention.

Claims

1. An integrated folding box, characterized in that, It includes a chassis (5), a front door (1), a rear door (4), a left door (2) and a right door (3) which are vertically connected to four sides of the chassis (5) respectively; Fixing grooves are provided at four corners of the chassis (5), namely a rear left fixing groove (53), a rear right fixing groove (54), a front left fixing groove (51) and a front right fixing groove (52); The rear door (4) includes a rear left column (411), a rear right column (412), and a rear door panel fixed between the rear left column (411) and the rear right column (412); A rear left fitting body (451) is connected to the bottom of the rear left column (411), and the rear left fitting body (451) is embedded in the rear left fixing groove (53); A rear right fitting body (452) is connected to the bottom of the rear right column (412), and the rear right fitting body (452) is embedded in the rear right fixing groove (54); The rear left fixing groove (53) includes a rear left bottom plate (531), a rear left left side plate (532) vertically connected to the left side of the rear left bottom plate (531), a rear left right side plate (534) vertically connected to the right side of the rear left bottom plate (531), and a rear left rear side plate (533) vertically connected to the rear side of the rear left bottom plate (531); A vertical rear left sliding groove (535) is formed on the right side surface of the rear left left side plate (532). The top width of the rear left sliding groove (535) is d1, the middle width is d2, and the bottom width is d3; A rear left top boss protrudes from the top of the left side surface of the rear left fitting body (451), and the top of the rear left top boss is connected to the bottom surface of the rear left column (411); A rear left bottom boss protrudes from the bottom of the left side surface of the rear left fitting body (451); The width of the rear left top boss in the front-rear direction is d1; The rear left bottom boss is a short cylinder with a small corner cut off by a rear left cutting inclined plane and a diameter of d5; The maximum width of the rear left bottom boss in the direction perpendicular to the rear left cutting inclined plane is d1, and the maximum width of the rear left bottom boss in the front-rear direction is d4; d1, d2, d3, d4, d5 satisfy the following formula: d1 < d4 ≤ d5 ≤ d3 < d2; When the rear left fitting body (451) is embedded in the rear left fixing groove (53), the rear left bottom boss is located at the bottom of the rear left sliding groove (535), and the rear left top boss is embedded in the top of the rear left sliding groove (535); The rear right fixing groove (54) includes a rear right bottom plate, a rear right right side plate vertically connected to the right side of the rear right bottom plate, a rear right left side plate vertically connected to the left side of the rear right bottom plate, and a rear right rear side plate vertically connected to the rear side of the rear right bottom plate; A vertical rear right sliding groove is formed on the left side surface of the rear right right side plate. The top width of the rear right sliding groove is d1, the middle width is d2, and the bottom width is d3; On the top of the right side of the rear right fitting body (452), a rear right top boss is protrudingly provided, and the top end of the rear right top boss is connected to the bottom surface of the rear right upright post (412); on the bottom of the right side of the rear right fitting body (452), a rear right bottom boss is protrudingly provided; the width of the rear right top boss in the front-rear direction is d1; the rear right bottom boss is a short cylinder with a small corner cut off by a rear right cutting inclined plane and a diameter of d5; the maximum width of the rear right bottom boss in the direction perpendicular to the rear right cutting inclined plane is d1, and the maximum width of the rear right bottom boss in the front-rear direction is d4; When the rear right fitting body (452) is embedded in the rear right fixing groove (54), the rear right bottom boss is located at the bottom of the rear right sliding groove, and the rear right top boss is embedded in the top of the rear right sliding groove; A horizontal rear lower fitting strip (59) is connected between the rear left fixing groove (53) and the rear right fixing groove (54), and a rear upper fitting strip (49) is fixed to the bottom of the rear door panel; on the rear side of the top surface of the rear lower fitting strip (59), a rear lower fitting protrusion is vertically upwardly provided, and on the rear side of the bottom surface of the rear upper fitting strip (49), a rear upper fitting recess is provided; When the rear left fitting body (451) is embedded in the rear left fixing groove (53) and the rear right fitting body (452) is embedded in the rear right fixing groove (54), the rear lower fitting protrusion is fitted into the rear upper fitting recess; The front door (1) includes a front left upright post (111), a front right upright post (112), and a front door panel (133) located between the front left upright post (111) and the front right upright post (112); the edge of the front door panel (133) protrudes forward to form a front frame, and the front frame includes a front upper frame (13) with a horizontal upper end, a front left frame (121) with a vertical left end, and a front right frame (122) with a vertical right end; A left limiting piece (131) extends from the left end of the front upper frame (13), and a right limiting piece (132) extends from the right end of the front upper frame (13); on the front surface of the top end of the front left upright post (111), a left limiting groove is provided, and on the front surface of the top end of the front right upright post (112), a right limiting groove is provided; the left limiting piece (131) is embedded in the left limiting groove from front to back, and the right limiting piece (132) is embedded in the right limiting groove from front to back; On the right side surface of the top of the front left upright post (111), a first front left lock hole is opened; at the top end of the front left frame (121), a second front left lock hole horizontally communicating with the first front left lock hole is opened; at the bottom left part of the front upper frame (13), a vertical front left lock fixture fixing plate (141) is connected, and on the front left lock fixture fixing plate (141), a third front left lock hole horizontally communicating with the second front left lock hole is opened; The front left lock fixture includes a front left lock fixture upper lock rod (1413) and a front left lock fixture lower lock rod which are vertically connected at the end; the front left lock fixture upper lock rod (1413) sequentially passes through the third front left lock hole and the second front left lock hole from right to left and then is embedded in the first front left lock hole; on the side wall of the front left lock fixture upper lock rod (1413), a protruding front left lock fixture boss (1412) is provided, and between the front left lock fixture boss (1412) and the front left lock fixture fixing plate (141), a front left spring (1411) is provided; A front left fitting body (151) is connected to the bottom of the front left upright column (111), and the front left fitting body (151) is embedded in the front left fixing groove (51); A front right fitting body (152) is connected to the bottom of the front right upright column (112), and the front right fitting body (152) is embedded in the front right fixing groove (52); The front left fixing groove (51) includes a front left bottom plate (511), a front left left side plate (512) vertically connected to the left side of the front left bottom plate (511), a front left right side plate (514) vertically connected to the right side of the front left bottom plate (511), and a front left front side plate (513) vertically connected to the front side of the front left bottom plate (511); A vertical front left sliding groove (515) is formed on the right side surface of the front left left side plate (512). The top width of the front left sliding groove (515) is d1, the middle width of the front left sliding groove (515) is d2, and the bottom width of the front left sliding groove (515) is d3; A front left top boss (1511) protrudes from the top of the left side surface of the front left fitting body (151), and the top end of the front left top boss (1511) is connected to the bottom surface of the front left upright column (111); A front left bottom boss (1512) protrudes from the bottom of the left side surface of the front left fitting body (151); The width of the front left top boss (1511) in the front-rear direction is d1; The front left bottom boss (1512) is a short cylinder with a small corner cut off by a front left cutting inclined plane and a diameter of d5; The maximum width of the front left bottom boss (1512) in the direction perpendicular to the front left cutting inclined plane is d1, and the maximum width of the front left bottom boss (1512) in the front-rear direction is d4; When the front left fitting body (151) is embedded in the front left fixing groove (51), the front left bottom boss (1512) is located at the bottom of the front left sliding groove (515), and the front left top boss (1511) is embedded in the top of the front left sliding groove (515); The front right fixing groove (52) includes a front right bottom plate, a front right right side plate vertically connected to the right side of the front right bottom plate, a front right left side plate vertically connected to the left side of the front right bottom plate, and a front right front side plate vertically connected to the front side of the front right bottom plate; A vertical front right sliding groove is formed on the left side surface of the front right right side plate. The top width of the front right sliding groove is d1, the middle width of the front right sliding groove is d2, and the bottom width of the front right sliding groove is d3; A front right top boss (1521) protrudes from the top of the right side surface of the front right fitting body (152), and the top end of the front right top boss (1521) is connected to the bottom surface of the front right upright column (112); A front right bottom boss (1522) protrudes from the bottom of the right side surface of the front right fitting body (152); The width of the front right top boss (1521) in the front-rear direction is d1; The front right bottom boss (1522) is a short cylinder with a small corner cut off by a front right cutting inclined plane and a diameter of d5; The maximum width of the front right bottom boss (1522) in the direction perpendicular to the front right cutting inclined plane is d1, and the maximum width of the front right bottom boss (1522) in the front-rear direction is d4; When the current right fitting body (152) is inserted into the front right fixing groove (52), the front right bottom boss (1522) is located at the bottom of the front right sliding groove, and the front right top boss (1521) is inserted into the top of the front right sliding groove; A horizontal front lower fitting strip (58) is connected between the front left fixing groove (51) and the front right fixing groove (52), and a front upper fitting strip (19) is connected between the bottom ends of the front left upright post (111) and the front right upright post (112); a front lower fitting protrusion is vertically upwardly arranged on the front side of the top surface of the front lower fitting strip (58), and a front upper fitting recess is arranged on the front side of the bottom surface of the front upper fitting strip (19); When the current front left fitting body (151) is inserted into the front left fixing groove (51) and the front right fitting body (152) is inserted into the front right fixing groove (52), the front lower fitting protrusion is fitted into the front upper fitting recess; A front door fan fixing strip (18) is arranged at the bottom of the front door fan (133), and a protruding strip arranged at the top of the front upper fitting strip (19) is inserted into a recessed strip arranged at the bottom of the front door fan fixing strip (18); The left door (2) includes a left door fan (231), a first left connecting sleeve (28) is arranged at the bottom end of the left door fan (231), a second left connecting sleeve (55) is arranged at the left edge of the bottom plate (5), and after the first left connecting sleeve (28) and the second left connecting sleeve (55) are axially communicated, they are hinged by a left pin shaft; The edge of the left door fan (231) protrudes leftward to form a left frame, and the left frame includes a left upper horizontal frame (23), a left rear vertical frame (221) at the rear side, and a left front vertical frame (222) at the front side; A first left rear lock hole is opened on the front side of the top of the rear left upright post (411), and a first left front lock hole is opened on the rear side of the top of the front left upright post (111); a second left rear lock hole horizontally communicating with the first left rear lock hole is opened at the top end of the left rear frame (221), and a second left front lock hole horizontally communicating with the first left front lock hole is opened at the top end of the left front frame (222); A vertical left rear lock fixture fixing plate is connected to the bottom end of the rear part of the left upper frame (23), and a vertical left front lock fixture fixing plate is connected to the bottom end of the front part of the left upper frame (23); a third left rear lock hole horizontally communicating with the second left rear lock hole is opened on the left rear lock fixture fixing plate; a third left front lock hole horizontally communicating with the second left front lock hole is opened on the left front lock fixture fixing plate; The left rear lock fixture includes a left rear lock fixture upper lock rod (251) and a left rear lock fixture lower lock rod which are vertically connected at the end; the rear end face of the left rear lock fixture upper lock rod (251) is a sliding inclined plane; the left rear lock fixture upper lock rod (251) sequentially passes through the third left rear lock hole and the second left rear lock hole from front to back and then is inserted into the first left rear lock hole; a protruding left rear lock fixture boss is arranged on the side wall of the left rear lock fixture upper lock rod (251), and a left rear spring (271) is arranged between the left rear lock fixture boss and the left rear lock fixture fixing plate; The left front lock fixture includes a left front lock fixture upper lock rod (252) and a left front lock fixture lower lock rod which are vertically connected at the end; the front end face of the left front lock fixture upper lock rod (252) is a sliding inclined plane; The upper locking rod (252) of the left front lock passes through the third left front lock hole and the second left front lock hole from back to front in sequence and is then embedded in the first left front lock hole; a left front lock boss is provided on the side wall of the upper locking rod (252) of the left front lock, and a left front spring (272) is provided between the left front lock boss and the left front lock fixing plate; A vertical rear left limiting plate (461) is further fixed to the front side of the left end of the rear left column (411), a vertical front left limiting plate (161) is further fixed to the rear side of the left end of the front left column (111), and a left door limiting plate (56) vertically connected to the left edge of the chassis (5) is further provided on the left side of the second left connecting sleeve (55); The left door leaf (231) is limited to the right side of the rear left limiting plate (461), the front left limiting plate (161) and the left door limiting plate (56); A rear left limiting opening is formed in the rear left limiting plate (461), a rear left protruding block (261) is convexly provided on the left side surface of the rear left frame (221), and the rear left protruding block (261) is embedded in the rear left limiting opening from right to left; A front left limiting opening (171) is formed in the front left limiting plate (161), a front left protruding block (262) is convexly provided on the left side surface of the front left frame (222), and the front left protruding block (262) is embedded in the front left limiting opening (171) from right to left; The right door (3) includes a right door leaf, a first right connecting sleeve is provided at the bottom end of the right door leaf, a second right connecting sleeve is provided at the right edge of the chassis (5), and the first right connecting sleeve and the second right connecting sleeve are axially communicated and then hinged through a right pin shaft; The top edges of the front door leaf (133), the rear door leaf, the left door leaf (231) and the right door leaf are all located on the same horizontal plane; the tops of the rear left column (411), the rear right column (412), the front left column (111) and the front right column (112) are all higher than the horizontal plane and first stacking grooves (61) are formed on the upper surfaces of the tops; the chassis (5) is further fixed with stacking positioning blocks (6) below each fixing groove; a second stacking groove (62) is formed on the bottom surface of each stacking positioning block (6), and stacking protruding blocks (63) vertically aligned with the first stacking grooves (61) are provided at each second stacking groove (62); a fixing groove stacking protrusion (64) vertically aligned with the second stacking groove (62) is further provided at the top of each fixing groove; One end of the left pin shaft is tightly fixed in the first left connecting sleeve (2) through a left pin shaft boss, and the other end is slidably arranged in the second left connecting sleeve (55); One end of the right pin shaft is tightly fixed in the first right connecting sleeve through a right pin shaft boss, and the other end is slidably arranged in the second right connecting sleeve.

2. The integrated folding box according to claim 1, characterized in that A first front right lock hole is formed in the left side surface of the top of the front right column (112); a second front right lock hole horizontally communicated with the first front right lock hole is formed at the top end of the front right frame (122); a vertical front right lock fixing plate (142) is connected to the bottom end of the right part of the front upper frame (13); a third front right lock hole horizontally communicated with the second front right lock hole is formed in the front right lock fixing plate (142); The front right lock includes a front right upper lock rod (1423) and a front right lower lock rod vertically connected at the end; the front right upper lock rod (1423) passes through the third front right lock hole and the second front right lock hole from left to right in sequence and is embedded in the first front right lock hole; a front right lock boss (1422) is arranged on the side wall of the front right upper lock rod (1423), and a front right spring (1421) is arranged between the front right lock boss (1422) and the front right lock fixing plate (142); The edge of the right door leaf protrudes rightward to form a right frame, and the right frame includes an upper right frame that is horizontal in the upper part, a right rear frame that is vertical in the rear side, and a right front frame that is vertical in the front side; A first right rear lock hole is provided on the front side of the top of the rear right column (412), and a first right front lock hole is provided on the rear side of the top of the front right column (112); a second right rear lock hole horizontally communicating with the first right rear lock hole is provided at the top of the right rear frame, and a second right front lock hole horizontally communicating with the first right front lock hole is provided at the top of the right front frame; A vertical right rear lock fixing plate is connected to the bottom end of the rear part of the upper right frame, and a vertical right front lock fixing plate is connected to the bottom end of the front part of the upper right frame; a third right rear lock hole horizontally communicating with the second right rear lock hole is provided on the right rear lock fixing plate; a third right front lock hole horizontally communicating with the second right front lock hole is provided on the right front lock fixing plate; The right rear lock includes a right rear upper lock rod and a right rear lower lock rod vertically connected at the end; the rear end face of the right rear upper lock rod is a sliding inclined plane; The right rear upper lock rod passes through the third right rear lock hole and the second right rear lock hole from front to back in sequence and is embedded in the first right rear lock hole; a protruding right rear lock boss is arranged on the side wall of the right rear upper lock rod, and a right rear spring is arranged between the right rear lock boss and the right rear lock fixing plate; The right front lock includes a right front upper lock rod and a right front lower lock rod vertically connected at the end; the front end face of the right front upper lock rod is a sliding inclined plane; The right front upper lock rod passes through the third right front lock hole and the second right front lock hole from back to front in sequence and is embedded in the first right front lock hole; a right front lock boss is arranged on the side wall of the right front upper lock rod, and a right front spring is arranged between the right front lock boss and the right front lock fixing plate; A vertical rear right limit plate (462) is further fixed on the front side of the right end of the rear right column (412), a vertical front right limit plate (162) is further fixed on the rear side of the right end of the front right column (112), and a right door limit plate (57) vertically connected to the right edge of the chassis (5) is further arranged on the right side of the second right connecting sleeve; the right door leaf is limited to the left side of the rear right limit plate (462), the front right limit plate (162) and the right door limit plate (57); A rear right limit opening is provided on the rear right limit plate (462), a rear right protruding block is convexly arranged on the right side surface of the right rear frame, and the rear right protruding block is embedded in the rear right limit opening from left to right; a front right limit opening (172) is provided on the front right limit plate (162), a front right protruding block is convexly arranged on the right side surface of the right front frame, and the front right protruding block is embedded in the front right limit opening (172) from left to right.

3. The integrated folding box according to claim 2, wherein A protruding rear left limit protrusion block (29) is provided at the bottom of the rear surface of the left door leaf (231); a protruding front left limit protrusion block is provided at the bottom of the front surface of the left door leaf (231).

4. The integrated folding box according to claim 2 or 3, characterized in that, A protruding rear right limit protrusion block is provided at the bottom of the rear surface of the right door leaf; a protruding front right limit protrusion block is provided at the bottom of the front surface of the right door leaf.

Images