Packaging box

Abstract

The utility model discloses a packaging box and relates to the technical field of ton bag packaging boxes. The box comprises a box body, a box cover and a bottom frame, the box body is provided with a containing cavity used for containing a ton bag, and a material leakage hole is formed in the bottom of the box body. The box cover is placed on the upper side of the box body and used for covering the box body. The bottom frame is arranged on the lower side of the box body and used for bearing the box body. The upper end face of the box cover is provided with a plurality of concave areas, and the lower end face of the bottom frame extends downwards to be provided with a plurality of supporting legs corresponding to the concave areas. The bottom frame can be stacked on the upper side of a box cover of another packaging box through cooperation of the supporting legs and the concave areas. By the adoption of the technical scheme, the ton bag conveying device has the advantages that when ton bags full of powder are conveyed, the ton bags are not prone to toppling over, a plurality of ton bags can be stacked, and more ton bags can be placed in the unit area.

Description

Technical Field

[0001] The utility model relates to the technical field of ton bag packaging boxes, in particular to a packaging box. Background Art

[0002] Ton bags, also known as flexible bulk bags, container bags, and space bags, are medium-sized bulk containers and a type of containerized unit transporter. They are moisture-proof, dust-proof, radiation-resistant, durable, and secure, and possess sufficient structural strength. Due to their ease of loading, unloading, and handling, and their significant improvement in loading and unloading efficiency, ton bags have seen rapid growth in recent years. Container bags are typically made from polyester fibers such as polypropylene and polyethylene.

[0003] However, ton bags filled with powder have low transportation efficiency, occupy a large area when stored, and are prone to tipping over during transportation, which urgently needs improvement. Utility Model Content

[0004] The purpose of the utility model is to provide a packaging box to address the defects and shortcomings of the existing technology. The box has the advantages that when transporting ton bags filled with powder, the ton bags are not easy to tip over, and multiple ton bags can be stacked, so that more ton bags can be placed in a unit area.

[0005] To achieve the above purpose, the technical solution adopted by the present invention is: a packaging box, comprising:

[0006] The box body has a receiving cavity for placing the ton bags, and a material leakage hole is opened at the bottom of the box body;

[0007] a box cover, placed on the upper side of the box body, for covering the box body; and

[0008] A bottom frame is provided on the lower side of the box body and is used to support the box body;

[0009] The upper end surface of the box cover is provided with several recessed areas, and the lower end surface of the base frame is provided with several supporting feet corresponding to the recessed areas extending downward; the base frame can be stacked on the upper side of the box cover of another packaging box through the cooperation between the supporting feet and the recessed areas.

[0010] The utility model is further provided that the box body includes: four side panels arranged around the box body, and a bottom panel arranged on the bottom side of the side panels and forming together with the side panels the accommodating cavity for placing ton bags; the side panels are rotatably assembled on the upper side of the bottom panel; when stored, the multiple side panels are rotated and folded inwardly respectively.

[0011] The utility model is further configured such that the four side panels are: a first side panel, a second side panel and a fourth side panel adjacent to the first side panel, and a third side panel located opposite the first side panel; a channel is formed on one side of the first side panel close to the second side panel and the other side of the first side panel close to the fourth side panel, as well as on one side of the third side panel close to the second side panel and the other side of the third side panel close to the fourth side panel;

[0012] The packaging box also includes four fixing straps, each of which passes through one of the channels. The lower ends of the fixing straps are fixed in the bottom plate, and the upper ends extend out of the upper side of the channels and form a ring or hook shape for hanging the box.

[0013] The utility model is further provided that the packaging box also includes a plurality of flaps arranged in the accommodating cavity and located on the bottom plate; the leakage hole is commonly opened in the middle of the bottom plate and the flap; the side of the flap away from the leakage hole is a free end, and when the free end is lifted, the flap forms a slope inclined toward the leakage hole.

[0014] The utility model is further provided that the flap is rotatably assembled on the side of the bottom plate close to the leakage hole through a rotating shaft; the bottom plate is provided with a top plate hole corresponding to each flap, and the top plate hole is located on the side of the bottom plate away from the rotating shaft.

[0015] The utility model is further provided with a plurality of grooves connected to the leakage holes on the inner bottom wall of the bottom plate, and a flap is installed corresponding to each groove; when the flap is laid flat, the flap just fills the groove.

[0016] The present invention is further provided that the packaging box also includes a plurality of hooks arranged on the inner wall of the box body and close to the upper side for hooking the ton bags.

[0017] The present invention is further provided with a hook placement groove on the upper side of the inner wall of the box body, and the hook can be received in the hook placement groove.

[0018] The present invention is further provided that the packaging box also includes a closing device arranged on the inner bottom side or the outer bottom side of the box body for opening or closing the leakage hole.

[0019] The utility model is further provided that the closing device includes: a first covering plate slidably assembled on the bottom side of the outside of the box body, and a second covering plate slidably assembled on the bottom side of the outside of the box body; the first covering plate and the second covering plate move toward or away from each other to close or open the leakage hole.

[0020] After adopting the above technical solution, the beneficial effects of the utility model are as follows: in the utility model, by providing a box body for placing ton bags, when the ton bags filled with powder are placed in the box body, the box body supports the ton bags on all sides, effectively preventing the ton bags from tipping over; in addition, by providing a box cover and a base frame, and the upper end face of the box cover is provided with a number of recessed areas, and the lower end face of the base frame is provided with a number of supporting feet extending downward, the base frame can be stacked on the upper side of the box cover of another packaging box through the cooperation of the supporting feet and the recessed areas, thereby realizing the stacking of multiple packaging boxes, and then accommodating more ton bags filled with powder in a unit area, and the cooperation of the recessed areas and the supporting feet prevents the base frame from sliding relative to the lower box cover, which is safer when stacking. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0022] Figure 1 It is a structural diagram of the packaging box;

[0023] Figure 2 This is a schematic diagram of the structure of two stacked packaging boxes;

[0024] Figure 3 This is a schematic diagram of the exploded structure of the packaging box;

[0025] Figure 4 It is a structural diagram of the chassis;

[0026] Figure 5 This is a structural diagram of the chassis from another perspective;

[0027] Figure 6 It is a structural diagram of the box and fixing straps;

[0028] Figure 7 It is a structural diagram of the side panel;

[0029] Figure 8 This is a schematic diagram of the structure of the hidden bottom plate of the box;

[0030] Figure 9 This is a schematic diagram of the structure of the packaging box with the flap in a flat state;

[0031] Figure 10 It is a structural diagram of a packaging box with the flap in a raised state;

[0032] Figure 11This is a schematic diagram of the exploded structure of the box and chassis;

[0033] Figure 12 It is a structural diagram of the bottom plate with the flap in a flat state;

[0034] Figure 13 It is a structural diagram of the bottom plate with the flap in a raised state;

[0035] Figure 14 It is a structural diagram of the base plate;

[0036] Figure 15 This is a structural diagram of the hook being in the storage state and the cover plate closing the leakage hole;

[0037] Figure 16 This is a structural diagram of the hook being in an extended state and the cover plate opening the material leakage hole;

[0038] Figure 17 yes Figure 16 Enlarged view of point A in the middle;

[0039] Figure 18 It is a structural diagram of a hook;

[0040] Figure 19 This is a structural diagram of another type of hook;

[0041] Figure 20 This is a schematic diagram of the structure of the cover plate closing the leakage hole;

[0042] Figure 21 This is a structural diagram of the cover plate opening the leakage hole;

[0043] Figure 22 yes Figure 21 Schematic diagram of the structure explosion;

[0044] Figure 23 yes Figure 21 Schematic diagram of the structure explosion from another perspective.

[0045] Explanation of reference numerals: a, leakage hole; b, gathering cavity; 100, box body; 110, side panel; 110a, first side panel; 110b, second side panel; 110c, third side panel; 110d, fourth side panel; 111, passage; 112, hook placement slot; 120, bottom panel; 121, bottom panel body; 1211, top panel hole; 1212, groove; 1213, ridge; 122, bottom panel wall; 123, reinforcing rib; 130, flap; 130a, short side; 130b, long side; 130c, beveled side; 200, box cover; 210, recessed area; 300, base frame; 310, supporting leg; 310a, first supporting leg; 310b, second supporting leg; 310c, third supporting leg; 301d, fourth supporting leg; 320, leakage avoidance hole of base frame; 330, avoidance hole of top plate; 340, avoidance hole of travel slot; 400, fixing strap; 500, hook; 510, base; 520, hook body; 530, hook body placement slot; 600, cover plate; 610, first cover plate; 620, second cover plate; 630, boss; 640, fixing plate; 641, leakage avoidance hole of fixing plate; 642, travel slot. DETAILED DESCRIPTION

[0046] The present invention will be described in further detail below with reference to the accompanying drawings.

[0047] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed, but as long as they are within the scope of the claims of the present invention, they are protected by patent law.

[0048] This embodiment relates to a packaging box, referring to Figure 1-Figure 5 The container comprises a box body 100, a cover 200, and a base frame 300. The box body 100 has a storage cavity for ton bags; the cover 200 is placed on the upper side of the box body 100 to cover the box body 100; and the base frame 300 is located on the lower side of the box body 100 to support the box body 100. The upper end surface of the cover 200 is provided with several recessed areas 210, and the lower end surface of the base frame 300 is provided with several support legs 310 extending downwardly, corresponding to the recessed areas 210.

[0049] By providing a box body 100 for placing ton bags, the traditional disposable ton bag + pallet format is changed, so that when the ton bag filled with powder is placed in the box body 100, the box body 100 supports the ton bag on all sides, effectively preventing the ton bag from tipping over; in addition, by providing a box cover 200 and a base frame 300, and the upper end surface of the box cover 200 is provided with a plurality of recessed areas 210, and the lower end surface of the base frame 300 is provided with a plurality of supporting legs 310 extending downward, the base frame 300 can be stacked on the upper side of the box cover 200 of another packaging box through the cooperation of the supporting legs 310 and the recessed areas 210, thereby realizing the stacking of multiple packaging boxes, and then accommodating more ton bags filled with powder in a unit area, and the cooperation of the recessed areas 210 and the supporting legs 310 prevents the base frame 300 from sliding relative to the lower box cover 200, making it safer when stacking.

[0050] Specifically in this embodiment, refer to Figure 4 and Figure 5 The base frame 300 includes several supporting legs 310, including a first, elongated supporting leg 310a located on one side of the lower end of the base frame 300; a second, elongated supporting leg 310b located on the lower end of the base frame 300 away from the first supporting leg 310a; a third, block-shaped supporting leg 310c located on the lower end of the base frame 300, between the first and second supporting legs 310a, 310b, and near the other side; and a fourth, block-shaped supporting leg 301d located on the lower end of the base frame 300, between the first and second supporting legs 310a, 310b, and away from the third supporting leg 310c. The upper end of the lid 200 is provided with four recessed areas 210 corresponding to the four supporting legs 310. When the base frame 300 is placed on the box lid 200 from above, it is restricted by the recessed area 210 and the support legs 310 and cannot move in any horizontal direction, thus improving the safety of multiple boxes when stacked. Of course, in other embodiments, the shape, number, and position of the support legs 310, as well as the recessed area 210, can also be designed in other ways, as long as they can limit the horizontal movement between the base frame 300 and the box lid 200. In this embodiment, the base frame 300 is also fixed to the bottom side of the box body 100 by external locking members.

[0051] Existing ton bags are usually placed on a ton bag unpacking machine when unloading, and the ton bag is punctured by the bag breaking head of the ton bag unpacking machine for unloading. The box 100 of this solution can be placed on the ton bag unpacking machine together with the ton bag for unloading, without having to take out the ton bag, saving time and being very convenient to use. Figure 6 、 Figure 9 and Figure 10As shown, the bottom of the box body 100 is provided with a leakage hole a, so that the ton bag can be built into the box body 100 and can also be broken with the bag breaking head. The bag breaking head passes through the leakage hole a from bottom to top and directly acts on the ton bag without damaging the box body 100. The box body 100 can be reused, saving costs. Figure 4 、 Figure 5 and Figure 11 As shown, the chassis 300 is provided with chassis leakage avoidance holes 320 corresponding to the leakage holes a, so that the chassis 300 can also be placed together with the box body 100 on a ton bag unpacking machine for unloading.

[0052] Reference Figure 6-Figure 8 The box 100 includes four circumferentially arranged side panels 110, and a bottom panel 120 disposed on the undersides of the side panels 110 and, together with the side panels 110, forming a storage chamber for the ton bags. The side panels 110 are pivotally mounted on the top of the bottom panel 120. When stored, the side panels 110 rotate and fold inward, significantly reducing the space occupied by the box 100. Specifically, in this embodiment, the side panels 110 are pivotally mounted on the bottom panel 120 via a rotating shaft.

[0053] The four side panels 110 are: a first side panel 110a, a second side panel 110b and a fourth side panel 110d adjacent to the first side panel 110a, and a third side panel 110c located opposite the first side panel 110a. A channel 111 extending from top to bottom is defined on one side of the first side panel 110a near the second side panel 110b and the other side near the fourth side panel 110d, as well as on one side of the third side panel 110c near the second side panel 110b and the other side near the fourth side panel 110d. The packaging box also includes four fixing straps 400, each of which passes through one of the channels 111. The lower ends of the fixing straps 400 are fixed to the bottom panel 120, and the upper ends extend above the channels 111 and form a loop or hook shape for hanging the box body 100. Of course, in other embodiments, two channels 111 may be provided on each side panel 110, that is, eight channels 111 are provided, and correspondingly, eight fixing straps 400 are provided. Here, the upper ends of the fixing straps 400 are formed into a loop or hook shape, which includes two situations: one is that the upper ends of the fixing straps 400 are externally connected to a loop or hook-shaped connector, and the other is that the upper ends of the fixing straps 400 are directly looped or hooked.

[0054] By providing a fixing strap 400, and the fixing strap 400 passes through the channel 111 of the side panel 110, one end of the fixing strap 400 is fixed in the bottom plate 120, and the other end extends out of the upper side of the channel 111 and forms a ring or hook shape. Therefore, when the box body 100 is hung by the fixing strap 400, the gravity exerted on the fixing strap 400 is directly transmitted to the bottom plate 120, and only the strength of the connection between the fixing strap 400 and the bottom plate 120 is tested. Moreover, since the lower end of the fixing strap 400 is directly fixed in the bottom plate 120 rather than on the upper side of the bottom plate 120, the strength of the connection is greater, so that the high-strength packaging box is not easy to fall off the hang during hoisting.

[0055] The four side panels 110 together form a rectangular parallelepiped frame. Specifically in this embodiment, the four side panels 110 form a rectangular parallelepiped with a square cross section. Figure 14 In addition to the bottom plate body 121 , the bottom plate 120 also has a bottom plate surrounding wall 122 located around the bottom plate body 121 ; the side plate 110 is rotatably mounted on the bottom plate surrounding wall 122 .

[0056] In this embodiment, the fixing strap 400 is a tendon binding rope; in other embodiments, the fixing strap 400 may also be made of other materials.

[0057] Reference Figure 8 Horizontally positioned reinforcing ribs 123 are built into the bottom plate 120, located on the undersides of the first and third side panels 110a, 110c. The lower ends of the fixing straps 400 are secured to the ends of the reinforcing ribs 123. Taking the first side panel 110a as an example, the lower ends of the two fixing straps 400 are secured to the ends of the reinforcing ribs 123, maintaining balance. This explains why two channels 111 are provided on each of the two side panels 110, rather than one per side panel 110. Furthermore, the reinforcing ribs 123 are preferably steel bars, which provide sufficient strength.

[0058] Specifically, the lower end of the fixing strap 400 is sleeved and fits over the end of the reinforcing rib 123. The interior of the bottom plate 120 corresponding to the first side plate 110a and the third side plate 110c is originally hollow. After the fixing strap 400 is inserted, the hollow space is filled, thereby securing the lower end of the fixing strap 400 within the bottom plate 120.

[0059] Reference Figures 9-11 The packaging box also includes multiple flaps 130 disposed within the receiving cavity and located on the bottom plate 120. A material leakage hole a is defined in the center of both the bottom plate 120 and the flaps 130. The side of the flaps 130 facing away from the material leakage hole a is a free end. When the free end is raised, the flaps 130 form a slope that slopes toward the material leakage hole a.

[0060] By arranging multiple flaps 130 on the bottom plate 120, the flaps 130 can be lifted away from one side of the leakage hole a, so that the multiple flaps 130 are gathered together to form a landslide leading to the leakage hole a, which helps to fully and quickly release the powder in the ton bag; when the flaps 130 are in a flat state, there is more space in the accommodating cavity to accommodate the ton bag, so that the packaging box can be adapted to accommodate ton bags with more powder. After part of the powder in the ton bag is released, the flaps 130 are lifted to form a landslide to further release the powder.

[0061] In this embodiment, the flap 130 is rotatably mounted on the side of the bottom plate 120 near the material leakage hole a via a rotating shaft (not shown). Figure 12-14 The bottom plate 120 is provided with a top plate hole 1211 corresponding to each flap 130. The top plate hole 1211 is located on the side of the bottom plate 120 away from the rotating shaft. Specifically, in this embodiment, the bottom plate 120 is provided with 2N top plate holes 1211, with two top plate holes 1211 corresponding to each flap 130. During operation, multiple external push rods pass through the top plate holes 1211 from bottom to top and continue to lift upward, thereby lifting the free end of each flap 130 upward, thereby bringing the multiple flaps 130 together, forming a landslide leading to the leakage hole a. After the external push rods retract, they no longer support the flaps 130, and the flaps 130 no longer gather together but fall back onto the bottom plate 120.

[0062] Reference Figure 4 、 Figure 5 and Figure 11 In addition to the bottom frame leakage avoidance hole 320 corresponding to the leakage hole a, the bottom frame 300 also has a top plate avoidance hole 330 corresponding to the top plate hole 1211.

[0063] Reference Figure 9 and Figure 10 There is an arc-shaped transition between the bottom plate 120 and the leakage hole a, which helps guide the powder in the ton bag to the leakage hole a no matter which state the flap 130 is in.

[0064] Reference Figure 12-14 The inner bottom wall of the base plate 120 is provided with multiple grooves 1212 that connect to the material leakage hole a. Each groove 1212 corresponds to a corresponding flap 130. When the flap 130 is flat, it neatly fills the groove 1212. Specifically, the inner bottom wall of the base plate 120 is provided with multiple ridges 1213. Each ridge 1213 extends from the inner sidewall of the base plate 120 toward the material leakage hole a, and adjacent ridges 1213 form the grooves 1212. When the flap 130 is flat, the flap 130 and the ridges 1213 are flush, forming a flat surface. This allows for better placement of bulk bags. Furthermore, after the bulk bags are punctured, the powder inside the bags will not remain on the inner bottom wall due to the unevenness of the inner bottom wall of the base plate 120.

[0065] Reference Figure 12-14 The outer contour of the inner bottom wall of the bottom plate 120 is also square. A groove 1212 is formed between each side of the inner bottom wall of the bottom plate 120 and the material leakage hole a; when the four flaps 130 are lifted, they together form a gathering cavity b.

[0066] In one embodiment, if Figure 12-13 As shown, the flap 130 is trapezoidal in shape, with the side of the flap 130 closest to the leakage hole a being the short side 130a and the side further away from the leakage hole a being the long side 130b. The two oblique sides 130c connecting the short side 130a and the long side 130b are arranged in mirror symmetry. Specifically, the angle between the long side 130b and the oblique side 130c is 45°. When the four flaps 130 are raised to the set angle, the oblique sides 130c of adjacent flaps 130 completely align, effectively forming a tightly joined collection chamber b formed by the four flaps 130, preventing powder within the collection chamber b from falling into the ridge 1213 or groove 1212.

[0067] In one embodiment, the flap 130 is rectangular, and after the four flaps 130 are lifted 90 degrees, a gathering cavity b without gaps can be formed.

[0068] In some embodiments, other numbers of flaps 130 may be provided, and the shape of the flaps 130 is not limited. Preferably, after the plurality of flaps 130 are lifted, a gathering cavity b without gaps can be formed.

[0069] like Figure 15-17 As shown, the packaging box also includes a plurality of hooks 500 provided on the inner wall of the box body 100 and close to the upper side for hooking the ton bag. Since a plurality of hooks 500 are provided on the upper side of the inner wall of the box body 100, the ton bag can be hoisted with a sling or a ring, thereby supporting the ton bag.

[0070] like Figure 15-17 As shown, the upper inner wall of the box 100 is provided with a hook placement slot 112, into which the hook 500 can be stored. The design of the hidden hook 500 allows it to be concealed within the slot 112, preventing it from scratching the ton bag when it is placed. When the ton bag needs to be opened, the hook 500 is removed and the ton bag's strap is hung on the hook 500. Preferably, the hook 500, when stored, fills the slot 112 perfectly, leaving the inner wall of the box 100 smooth. There are various ways to conceal the hook 500, two of which are illustrated below.

[0071] As a preferred solution, Figure 17As shown, the hook 500 includes a base 510 fixedly disposed in the hook receiving slot 112, and a hook body 520 rotatably assembled on the base 510. When stored, the hook body 520 is rotated and folded onto the base 510, and the base 510 is stored in the hook receiving slot 112. When in use, the hook body 520 is rotated outward to be used.

[0072] Specifically in this embodiment, Figure 18 As shown, the hook body 520 is rotatably assembled to the lower side of the base 510 via a rotating shaft. The base 510 is screwed into the hook receiving slot 112. The base 510 is in the shape of a flat rectangular parallelepiped, and the hook body 520 is also generally in the shape of a flat rectangular parallelepiped. The free end of the hook body 520 is provided with a hook. When stored, the hooked free end of the hook body 520 is stored on the upper side of the base 510. To prevent the hook body 520 from falling when stored, the rotating shaft is a damping shaft. Of course, the base 510 can also be affixed to the hook receiving slot 112 using double-sided tape.

[0073] In another embodiment, Figure 19 As shown, the hook body 520 is rotatably mounted on the underside of the base 510 via a rotating shaft. A hook receiving slot 530 is defined in the middle of the base 510. When stored, the hook body 520 is rotated and stored within the hook receiving slot 530. The base 510 is screwed into the hook receiving slot 112. To prevent the hook body 520 from falling when stored, the rotating shaft is a damping shaft. Of course, the base 510 can also be affixed to the hook receiving slot 112 using double-sided tape.

[0074] In addition to using a damping shaft, other locking structures can also be provided between the base 510 and the hook 520. The locking structure is used to fix the hook 520 on the base 510 when the hook 520 is received in the hook placement slot 112.

[0075] In this embodiment, four hook placement slots 112 are provided on the upper side of the inner wall of the box body 100 near the top corners, and each hook placement slot 112 is correspondingly provided with a hook 500 .

[0076] like Figure 15-16 and Figure 21-22 As shown, the packaging box further includes a closing device. The closing device is arranged on the inner bottom side or the outer bottom side of the box body 100, and is used to open or close the leakage hole a.

[0077] A closing device located on the bottom of the box 100 allows for the opening and closing of the material leakage hole a. During initial use, the closing device closes the material leakage hole a, allowing the bulk bag to be placed. When unloading is required, the closing device opens, revealing the material leakage hole a. The bag breakers pass through the material leakage hole a and puncture the bulk bag. The user can close the material leakage hole a at any time, effectively blocking the damaged part of the bulk bag, preventing the powder inside from leaking out, thereby controlling the amount of material discharged from the bulk bag. The user can also adjust the size of the material leakage hole a, thereby adjusting the unloading speed, by sliding the cover plate 600.

[0078] In this embodiment, if Figure 20-23 As shown, the closing device includes a cover plate 600 that is slidably mounted on the outer bottom side of the box body 100 and is used to open or close the leakage hole a. Specifically, the leakage hole a is opened or closed by sliding the cover plate 600. More specifically, the cover plate 600 includes a first cover plate 610 that is slidably mounted on the outer bottom side of the box body 100, and a second cover plate 620 that is slidably mounted on the outer bottom side of the box body 100. The first cover plate 610 and the second cover plate 620 move toward or away from each other to close or open the leakage hole a. Of course, the user can also partially close the leakage hole a by sliding one of the cover plates 600 to adjust the material discharge speed.

[0079] As a preferred solution, Figure 20-23 As shown, a downwardly protruding column 630 is provided on one side of the cover plate 600 away from the box body 100 to facilitate sliding the cover plate 600. The user can slide the cover plate 600 by operating the column 630, which is more convenient than directly sliding the cover plate 600.

[0080] As a preferred solution, Figure 20-23 As shown, the closing device also includes: a fixing plate 640 fixedly assembled on the outer bottom side of the box body 100. Specifically in this embodiment, the fixing plate 640 is locked on the outer bottom side of the box body 100 by means of bolts and nuts. The cover plate 600 is located between the fixing plate 640 and the box body 100. The fixing plate 640 is provided with a fixing plate leakage avoidance hole 641 for avoiding the leakage hole a. The fixing plate 640 is provided with a travel groove 642 for the boss 630 to slide back and forth. When the boss 630 slides along the travel groove 642, it drives the cover plate 600 to slide back and forth to open or close the leakage hole a. The setting of the fixing plate 640 can effectively protect the cover plate 600; and the setting of the travel groove 642 on the fixing plate 640 can limit the sliding direction and sliding stroke of the boss 630, and also make the sliding of the cover plate 600 smoother.

[0081] More specifically, there is one fixed plate 640, and the fixed plate leakage avoidance hole 641 is located in the center of the fixed plate 640. Four travel grooves 642 are opened on the fixed plate 640, and each cover plate 600 corresponds to two travel grooves 642, that is, each cover plate 600 is provided with two protrusions 630. Figure 4 and Figure 5 A travel groove avoidance hole 340 for avoiding the travel groove 642 is opened on the base frame 300.

[0082] In some embodiments (not shown), the shielding plate 600 may include three or more small shielding plates slidably mounted on the bottom side of the outer portion of the box 100. Each small shielding plate can slide independently. In addition to opening or closing the entire material discharge hole a, the material discharge speed can also be controlled by sliding different numbers of small shielding plates.

[0083] In some embodiments (not shown), the closing device includes a third cover plate rotatably mounted on the outer bottom side of the box body 100 for opening or closing the leakage hole a. Compared with the sliding method, the rotational assembly method of the third cover plate is also a feasible solution.

[0084] In some embodiments (not shown), the closing device includes a fourth cover plate that is detachably mounted on the outer bottom side of the box body 100 and is used to open or close the leakage hole a. Compared with the sliding or rotating method, the detachable assembly method of the fourth cover plate is also a feasible solution.

[0085] In all the above embodiments, the closing device may be provided with a locking structure (not shown) to ensure the stability of the closing device. After the leakage hole a is fully opened, not opened or closed, the locking device ensures that the closing device does not change position.

[0086] The above is only used to illustrate the technical solution of the present invention and is not intended to limit it. Other modifications or equivalent substitutions made to the technical solution of the present invention by ordinary technicians in this field should be included in the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solution of the present invention.

Claims

1. A packaging box, characterized in that: include: The box body (100) has a receiving cavity for placing ton bags, and a material leakage hole (a) is opened at the bottom of the box body (100); a box cover (200), placed on the upper side of the box body (100) and used to cover the box body (100); and A bottom frame (300) is provided on the lower side of the box body (100) and is used to support the box body (100); The upper end surface of the box cover (200) is provided with a plurality of recessed areas (210), and the lower end surface of the base frame (300) is provided with a plurality of supporting legs (310) corresponding to the recessed areas (210) extending downward; the base frame (300) can be stacked on the upper side of the box cover (200) of another packaging box through the cooperation between the supporting legs (310) and the recessed areas (210).

2. The packaging box according to claim 1, characterized in that: The box body (100) comprises: four side panels (110) arranged around the box body, and a bottom panel (120) arranged on the bottom side of the side panels (110) and forming together with the side panels (110) the accommodating cavity for placing the ton bag; the side panels (110) are rotatably assembled on the upper side of the bottom panel (120); when stored, the plurality of side panels (110) are respectively rotated and folded inward.

3. The packaging box according to claim 2, characterized in that: The four side panels (110) are respectively: a first side panel (110a), a second side panel (110b) and a fourth side panel (110d) adjacent to the first side panel (110a), and a third side panel (110c) located opposite to the first side panel (110a); a channel (111) is respectively provided on one side of the first side panel (110a) close to the second side panel (110b) and the other side of the first side panel (110a) close to the fourth side panel (110d), and a channel (111) is respectively provided on one side of the third side panel (110c) close to the second side panel (110b) and the other side of the third side panel (110c) close to the fourth side panel (110d); The packaging box further comprises four fixing straps (400), each of the fixing straps (400) passing through one of the channels (111), the lower ends of the fixing straps (400) being fixed in the bottom plate (120), and the upper ends extending out of the upper side of the channels (111) and forming a ring or hook shape for the box body (100) to be hung.

4. The packaging box according to claim 2, characterized in that: The packaging box further comprises a plurality of flaps (130) arranged in the accommodating cavity and located on the bottom plate (120); the leakage hole (a) is commonly provided in the middle of the bottom plate (120) and the flaps (130); the side of the flaps (130) away from the leakage hole (a) is a free end, and when the free end is lifted, the flaps (130) form a slope inclined toward the leakage hole (a).

5. The packaging box according to claim 4, characterized in that: The flap (130) is rotatably assembled on a side of the bottom plate (120) close to the material leakage hole (a) via a rotating shaft; the bottom plate (120) is provided with a top plate hole (1211) corresponding to each flap (130), and the top plate hole (1211) is located on a side of the bottom plate (120) away from the rotating shaft.

6. The packaging box according to claim 4, characterized in that: A plurality of grooves (1212) communicating with the material leakage holes (a) are provided on the inner bottom wall of the bottom plate (120), and each of the grooves (1212) is correspondingly installed with one of the flaps (130); when the flaps (130) are laid flat, the flaps (130) just fill the grooves (1212).

7. The packaging box according to claim 1, characterized in that: The packaging box further comprises a plurality of hooks (500) arranged on the inner wall of the box body (100) and close to the upper side, and used for hooking the ton bags.

8. The packaging box according to claim 7, characterized in that: A hook placement groove (112) is provided on the upper side of the inner wall of the box body (100), and the hook (500) can be received in the hook placement groove (112).

9. The packaging box according to claim 1, characterized in that: The packaging box further comprises a closing device arranged on the inner bottom side or the outer bottom side of the box body (100) for opening or closing the leakage hole (a).

10. The packaging box according to claim 9, characterized in that: The closing device comprises: a first covering plate (610) slidably mounted on the outer bottom side of the box body (100), and a second covering plate (620) slidably mounted on the outer bottom side of the box body (100); the first covering plate (610) and the second covering plate (620) move toward or away from each other to close or open the leakage hole (a).

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