Automatic boxing device for U-shaped gaskets

Abstract

The utility model relates to the technical field of food packaging equipment, and provides a U-shaped gasket automatic boxing device which comprises a box body conveying line, a gasket conveying line and a pressing mechanism. The box body conveying line is arranged on the lower side of the gasket conveying line and used for conveying box bodies with upward openings. The gasket conveying line is used for conveying U-shaped gaskets; the pressing mechanism comprises an annular line body and a plurality of telescopic components. A part of the annular line body is arranged on the upper side of the gasket conveying line in the extending direction of the gasket conveying line. The multiple telescopic components are sequentially arranged at intervals in the extending direction of the annular line body, and the annular line body is used for driving the telescopic components to move in the extending direction of the annular line body. The telescopic component is used for pressing the U-shaped gaskets conveyed by the gasket conveying line into the box conveyed by the box conveying line. According to the U-shaped gasket boxing device, boxing operation of a plurality of U-shaped gaskets can be automatically completed, the whole boxing process does not need personnel participation, the packaging cost is reduced, and the boxing efficiency of the U-shaped gaskets is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of food packaging equipment, in particular to an automatic box packing device for U-shaped gaskets. Background Art

[0002] Currently, when milk bags are packed in boxes, gaskets are usually placed in the box. The gaskets are used to limit the placement of the milk bags in the box. They not only cushion the milk bags, but also provide internal support for the box, ensuring that the box is more beautiful and durable.

[0003] According to the packaging requirements of the product, various types of gaskets can be placed in the box. U-shaped gaskets are the most widely used gaskets in dairy product packaging. Figure 1 As shown, the U-shaped gasket 10 is in a flat form, and has a second area 102, a first area 101 and a third area 103 arranged in sequence along a first direction, and a fold extending along a second direction is provided between the first area 101, the second area 102 and the third area 103, wherein the first direction and the second direction are perpendicular. Figure 2 As shown, when the U-shaped gasket 10 is folded along the fold, the flat U-shaped gasket can be folded into a U-shaped form. When the U-shaped gasket 10 is in the U-shaped form, the second area 102 and the third area 103 are relatively arranged and are both perpendicular to the first area 101.

[0004] In practical applications, manual packing of U-shaped gaskets is usually adopted. This operation mode not only has high packaging costs, but also makes it difficult to ensure the packing efficiency of the U-shaped gaskets, thus affecting the packaging efficiency of the milk bags. Utility Model Content

[0005] The utility model provides an automatic packing device for U-shaped gaskets, which is used to at least solve or improve the problems of high packaging cost and difficulty in ensuring packing efficiency of U-shaped gaskets in the manual operation mode in the prior art.

[0006] The utility model provides a U-shaped gasket automatic boxing device, comprising: a box conveying line, a gasket conveying line and a pressing mechanism;

[0007] The box conveying line is arranged at the lower side of the gasket conveying line, and the box conveying line is used to convey boxes with the opening facing upward; the gasket conveying line is used to convey the U-shaped gaskets;

[0008] The pressing mechanism includes an annular line body and a plurality of telescopic members, a portion of the annular line body being arranged on the upper side of the gasket conveying line along the extension direction of the gasket conveying line; the plurality of telescopic members being arranged in sequence and spaced apart along the extension direction of the annular line body, and the annular line body being used to drive each of the telescopic members to move along the extension direction thereof;

[0009] Wherein, the telescopic member is used to press the U-shaped gasket conveyed by the gasket conveying line into the box conveyed by the box conveying line.

[0010] According to the U-shaped gasket automatic packing device provided by the utility model, the annular line body includes an annular conveyor chain and an annular track, and the annular track is extended along the extension direction of the annular conveyor chain;

[0011] The telescopic member includes a fixed frame and a lifting frame, the lifting frame is movably provided on the fixed frame along the vertical direction, and the fixed frame is connected to the endless conveying chain;

[0012] The annular track is connected to the lifting frame to guide the lifting frame to rise and fall relative to the fixed frame; the lifting frame is configured to press the U-shaped gasket into the box body during the descending process.

[0013] According to the U-shaped gasket automatic packing device provided by the utility model, the annular track includes a descending guide section, an ascending guide section and a horizontal connecting section;

[0014] The descending guide section, the ascending guide section and the horizontal connecting section are connected end to end in sequence, and the descending guide section and the ascending guide section are located on the upper side of the gasket conveying line;

[0015] The descending guide section is used to guide the lifting frame to move downward relative to the fixed frame, and the ascending guide section is used to guide the lifting frame to move upward relative to the fixed frame.

[0016] According to the automatic packing device for U-shaped gaskets provided by the utility model, the telescopic member further includes a rolling member; the rolling member is connected to the lifting frame, and the rolling member is in rolling contact with the annular track.

[0017] According to the U-shaped gasket automatic packing device provided by the utility model, the upper end of the fixing frame is connected to the ring conveyor chain, and the lower end of the fixing frame is slidably matched with the lifting frame;

[0018] The lifting frame is arranged on one side of the fixing frame, the rolling element is arranged on the upper end of the lifting frame and located on the side of the lifting frame away from the fixing frame, and the lower end of the lifting frame contacts or separates from the U-shaped gasket.

[0019] According to the U-shaped gasket automatic packing device provided by the utility model, the lifting frame includes a first connecting plate, a second connecting plate and a plurality of guide rods;

[0020] The fixing frame is provided with a plurality of guide sleeves, the plurality of guide sleeves are arranged side by side, the plurality of guide rods are passed through the plurality of guide sleeves in a one-to-one correspondence, and each guide rod extends in a vertical direction;

[0021] The first connecting plate is connected to the upper end of each guide rod respectively, and the rolling element is connected to the first connecting plate; the second connecting plate is connected to the lower end of each guide rod respectively, and the second connecting plate is configured to contact or separate from the U-shaped gasket.

[0022] According to the U-shaped gasket automatic packing device provided by the utility model, the gasket conveying line includes a first line body and a second line body;

[0023] The first line body and the second line body are spaced apart from each other and arranged side by side; a clamping section for clamping the U-shaped gasket is formed between the first line body and the second line body, and the clamping section is arranged on the upper side of the box conveying line.

[0024] According to the U-shaped gasket automatic packing device provided by the utility model, the first line body and the second line body are both belt conveyor mechanisms, and the conveying surfaces of the belt conveyor mechanisms are vertically distributed.

[0025] According to the U-shaped gasket automatic box packing device provided by the utility model, the box conveying line includes a main line body and a guardrail;

[0026] The main line body is used to support the bottom of the box body to realize the transportation of the box body; the guardrails are arranged on both sides of the main line body and are configured to contact the side walls of the box body to correct the placement posture of the box body on the main line body.

[0027] According to the U-shaped gasket automatic packing device provided by the present invention, the box conveying line further includes a limit assembly; the limit assembly includes a first limit member and a second limit member, the first limit member and the second limit member are relatively arranged on both sides of the main line body;

[0028] The first limiting member is configured to contact the left swing cover of the box body to limit the folding angle of the left swing cover toward the outside of the box body; the second limiting member is configured to contact the right swing cover of the box body to limit the folding angle of the right swing cover toward the outside of the box body.

[0029] The U-shaped gasket automatic packing device provided by the utility model is equipped with a box conveying line, a gasket conveying line and a pressing mechanism. During the packing process, based on the mutual cooperation of the box conveying line, the gasket conveying line and the pressing mechanism, the U-shaped gasket is transported on the upper side of the box conveying line while the box is conveyed by the box conveying line, and the telescopic action of each telescopic component in the pressing mechanism is utilized to press each U-shaped gasket in turn, thereby completing the packing operation of multiple U-shaped gaskets in turn.

[0030] As can be seen from the above, the utility model can automatically complete the packing operation of multiple U-shaped gaskets, and the entire packing process does not require human participation, thereby reducing packaging costs and ensuring the packing efficiency of the U-shaped gaskets. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are 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 work.

[0032] Figure 1 It is a structural schematic diagram of a U-shaped gasket in a flat state in the prior art;

[0033] Figure 2 This is a schematic diagram of the structure of a U-shaped gasket in the prior art;

[0034] Figure 3 This is one of the schematic diagrams of the automatic folding and packing equipment for U-shaped gaskets provided by the utility model;

[0035] Figure 4 This is the second schematic diagram of the automatic folding and packing device for U-shaped gaskets provided by the present invention;

[0036] Figure 5 It is a structural diagram of the feeding bin provided by the utility model;

[0037] Figure 6 It is a structural schematic diagram of the box packing device provided by the utility model;

[0038] Figure 7 It is a structural diagram of the pressing mechanism provided by the utility model;

[0039] Figure 8 It is a structural schematic diagram of the telescopic member provided by the utility model;

[0040] Figure 9 It is a structural schematic diagram of the annular track provided by the utility model;

[0041] Figure 10 It is a structural schematic diagram of the conveying line and the gasket conveying line in the folding device provided by the present invention being arranged relative to each other;

[0042] Figure 11 This is a schematic diagram of the box conveyor line provided by the present invention conveying multiple boxes in sequence;

[0043] Figure 12 The utility model provides Figure 11 A partial enlarged schematic diagram of the box conveying line;

[0044] Figure 13 It is a structural schematic diagram of the folding device provided by the utility model;

[0045] Figure 14 This is a schematic structural diagram of the pressing assembly provided by the present utility model;

[0046] Figure 15 This is a structural diagram of the folding assembly provided by the utility model;

[0047] Figure 16 It is a structural diagram of the feeding assembly provided by the utility model;

[0048] Reference numerals:

[0049] 10. U-shaped gasket; 101. First area; 102. Second area; 103. Third area; 20. Box; 201. Left swing cover; 202. Right swing cover;

[0050] 1. Feeding bin; 11. First supporting rack; 12. Second supporting rack;

[0051] 2. Folding device; 21. Conveyor line; 22. Pressing assembly; 221. First bracket; 222. Pressing wheel assembly; 23. Folding assembly; 231. First rotary drive member; 232. First dial wheel; 233. Second dial wheel; 234. Transmission shaft; 235. Adjusting assembly; 236. Guide assembly; 2361. First guide rod; 2362. Second guide rod; 24. Loading assembly; 241. Second bracket; 242. Second rotary drive member; 243. Rotating frame; 244. Nozzle assembly;

[0052] 3. Cartoning device; 31. Carton conveyor line; 311. Main line body; 312. Guardrail; 313. Limiting assembly; 3131. First limiting member; 3132. Second limiting member; 32. Gasket conveyor line; 321. First line body; 322. Second line body; 33. Pressing mechanism; 331. Annular line body; 332. Telescopic member; 3311. Annular conveyor chain; 3312. Annular track; 3301. Descending guide section; 3302. Ascending guide section; 3303. Horizontal connecting section; 3321. Fixed frame; 3322. Lifting frame; 3323. Rolling member. DETAILED DESCRIPTION

[0053] To make the purpose, technical solutions, and advantages of the present invention more clear, the following will be combined with the accompanying drawings to clearly and completely describe the technical solutions of the present invention. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0054] The following combination Figures 1-16 , the U-shaped gasket automatic folding and packing equipment provided by the utility model embodiment is described in detail through specific embodiments and application scenarios.

[0055] like Figure 3 and Figure 4 As shown, the embodiment of the present utility model provides a U-shaped gasket automatic folding and packing device, comprising: a folding device 2 and a packing device 3;

[0056] The folding device 2 is used to fold Figure 1 The U-shaped gasket 10 shown in the flat form is folded into Figure 2 The U-shaped form shown;

[0057] The box packing device 3 includes: a box conveying line 31, a gasket conveying line 32 and a pressing mechanism 33; the box conveying line 31 is arranged on the lower side of the gasket conveying line 32, and is used to convey the boxes 20 arranged with the open top facing upward; the gasket conveying line 32 is connected to the folding device 2 and is used to convey the folded U-shaped gaskets 10;

[0058] The pressing mechanism 33 includes an annular line body 331 and a plurality of telescopic members 332. A portion of the annular line body 331 is disposed on the upper side of the gasket conveying line 32 along the extension direction of the gasket conveying line 32. The plurality of telescopic members 332 are sequentially spaced apart along the extension direction of the annular line body 331. The annular line body 331 is used to drive each telescopic member 332 to move along the extension direction thereof.

[0059] The telescopic member 332 is used to press the U-shaped gasket 10 conveyed by the gasket conveying line 32 into the box 20 conveyed by the box conveying line 31 .

[0060] It is understandable that the folding device 2 is configured to be arranged on one side of the feeding bin 1, and the folding device 2 is used to pick up the flat U-shaped gasket 10 from the feeding bin 1, and can fold the flat U-shaped gasket 10 into a U-shaped form.

[0061] Exemplarily, the folding device 2 may include a plurality of manipulators, one of which is used to take the U-shaped gasket 10 from the feeding bin 1, and the other manipulators are used to cooperate with each other to fold the flat U-shaped gasket 10 into a U-shaped form.

[0062] like Figure 4 and Figure 5 As shown, the feeding bin 1 includes a first supporting rack 11 and a second supporting rack 12. The first supporting rack 11 and the second supporting rack 12 are arranged side by side and are used to support a plurality of flat U-shaped gaskets 10 placed side by side along a first direction. One of the first supporting rack 11 and the second supporting rack 12 is provided with a conveyor belt, which is used to drive the plurality of U-shaped gaskets 10 to move along the first direction to realize feeding of the U-shaped gaskets 10.

[0063] Furthermore, for the box packing device 3, the box conveying line 31, the gasket conveying line 32 and the annular line body 331 of the pressing mechanism 33 can all be configured to be conveyed along the same conveying direction and in a step-by-step conveying manner.

[0064] In actual application, while the box conveyor line 31 is conveying the box 20, the gasket conveyor line 32 synchronously conveys the U-shaped gasket 10 on the upper side of the box conveyor line 31. The annular line body 331 drives the telescopic member 332 to move above the gasket conveyor line 32, and the telescopic member 332 completes a process of extending downward and retracting upward. When the telescopic member 332 extends downward, the telescopic member 332 presses the U-shaped gasket 10 into the box 20. When the telescopic member 332 retracts upward, the telescopic member 332 leaves the box 20.

[0065] In this way, as the box conveyor line 31 conveys multiple boxes 20 in sequence, and the gasket conveyor line 32 conveys multiple U-shaped gaskets 10 in sequence, since the annular line body 331 drives the multiple telescopic members 332 to move to the upper side of the gasket conveyor line 32, the multiple telescopic members 332 perform telescopic actions in sequence, so that based on the multiple telescopic members 332, the packing operations of the multiple U-shaped gaskets 10 can be completed in sequence; in the entire packing process, the conveying actions of the box conveyor line 31 and the gasket conveyor line 32 and the pressing action of the pressing mechanism 33 can be carried out synchronously, ensuring the packing efficiency of the U-shaped gaskets 10.

[0066] Among them, the annular wire body 331 can be an annular chain, and the telescopic member 332 can be a cylinder or an electric push rod; by driving the multiple telescopic members 332 to move through the annular wire body 331, the telescopic members 332 can be reused, ensuring that the packing operation of the U-shaped gasket 10 can continue uninterruptedly.

[0067] The U-shaped gasket automatic folding and packing equipment shown in the present invention, by setting a folding device 2 and a packing device 3, can fold the flat U-shaped gasket 10 into a U-shaped shape by the folding device 2, and then use the packing device 3 to perform the packing operation of the U-shaped gasket 10. During the packing process, based on the mutual cooperation of the box conveying line 31, the gasket conveying line 32 and the pressing mechanism 33, the telescopic action of each telescopic component 332 in the pressing mechanism 33 is utilized to complete the packing operation of multiple U-shaped gaskets 10 in sequence.

[0068] As can be seen from the above, the utility model can automatically complete the folding and packing operations of multiple U-shaped gaskets 10, and the entire packing process does not require human participation, thereby reducing packaging costs and ensuring the folding and packing efficiency of the U-shaped gaskets 10.

[0069] In some embodiments, as Figure 6 and Figure 7 As shown, the annular line body 331 includes an annular conveying chain 3311 and an annular track 3312, and the annular track 3312 is extended along the extension direction of the annular conveying chain 3311;

[0070] like Figure 7 and Figure 8 As shown, the telescopic member 332 includes a fixed frame 3321 and a lifting frame 3322. The lifting frame 3322 is movably provided on the fixed frame 3321 along the vertical direction. The fixed frame 3321 is connected to the endless conveying chain 3311.

[0071] The annular track 3312 is connected to the lifting frame 3322 to guide the lifting frame 3322 to rise and fall relative to the fixing frame 3321 ; the lifting frame 3322 is configured to press the U-shaped gasket 10 into the box body 20 during the descent process.

[0072] It can be understood that the annular conveyor chain 3311 is equipped with a driving gear disc and a driven gear disc, which are spaced apart from each other and can be rotatably mounted on the first frame; the annular conveyor chain 3311 is respectively engaged with the driving gear disc and the driven gear disc, and is wound between the driving gear disc and the driven gear disc.

[0073] At the same time, the circular track 3312 is installed on the first frame. The circular track 3312 is configured to extend along the extension direction of the circular conveyor chain 3311 and is located below the circular conveyor chain 3311.

[0074] Furthermore, regarding the telescopic member 332, the fixed frame 3321 is configured to extend in the vertical direction. A vertical guide structure is provided between the fixed frame 3321 and the lifting frame 3322. The vertical guide structure guides the lifting frame 3322 so that it can be movably mounted in the vertical direction relative to the fixed frame 3321. The vertical guide structure can be composed of a sliding rail and a slider that can be slidably engaged, or it can be composed of a guide rod and a guide hole that can be plugged into and engaged with each other.

[0075] Among them, a part of the annular track 3312 located on the upper side of the gasket conveyor line 32 is used to guide the lifting frame 3322 to rise and fall relative to the fixed frame 3321. The lifting frame 3322 can use a slider to slide with the annular track 3312, or it can be configured with a rope loop that can be sleeved on the annular track 3312. There is no specific limitation on this, as long as the annular track 3312 can guide the lifting frame 3322 to rise and fall relative to the fixed frame 3321.

[0076] As can be seen from the above, the utility model adopts an annular track 3312 to guide the lifting frame 3322 of each telescopic member 332 relative to the fixed frame 3321 to complete the telescopic action of the telescopic member 332. The entire process does not involve electric control. This design simplifies the layout structure and control process of the pressing mechanism 33, and realizes precise control of the telescopic action of each telescopic member 332, which is conducive to ensuring the accurate and reliable completion of the packing operation of each U-shaped gasket 10.

[0077] In some embodiments, as Figure 7 and Figure 9 As shown, the annular track 3312 includes a descending guide section 3301, an ascending guide section 3302, and a horizontal connecting section 3303; the descending guide section 3301, the ascending guide section 3302, and the horizontal connecting section 3303 are connected end to end in sequence, and the descending guide section 3301 and the ascending guide section 3302 are located on the upper side of the gasket conveying line 32;

[0078] The descending guide section 3301 is used to guide the lifting frame 3322 to move downward relative to the fixing frame 3321 , and the ascending guide section 3302 is used to guide the lifting frame 3322 to move upward relative to the fixing frame 3321 .

[0079] It can be understood that the descending guide section 3301 extends obliquely downward along the conveying direction of the gasket conveying line 32, and the ascending guide section 3302 extends obliquely upward along the conveying direction of the gasket conveying line 32. The descending guide section 3301 and the ascending guide section 3302 can form a "V"-shaped structure.

[0080] In the process of the descending guide section 3301 guiding the lifting frame 3322 to move downward relative to the fixed frame 3321, the lifting frame 3322 moves horizontally forward along the conveying direction of the gasket conveying line 32 while also moving downward, thereby pressing the U-shaped gasket 10 into the box body 20.

[0081] Accordingly, in the process of the rising guide section 3302 guiding the lifting frame 3322 to move upward relative to the fixed frame 3321, the lifting frame 3322 moves horizontally forward along the conveying direction of the gasket conveying line 32 while also moving upward, thereby realizing the separation of the lifting frame 3322 from the box body 20.

[0082] Since the various positions of the horizontal connecting sections 3303 are distributed on the same horizontal plane, the horizontal connecting sections 3303 cannot drive the lifting frame 3322 to rise or fall relative to the fixing frame 3321 .

[0083] Furthermore, arc-shaped transition sections are provided between the horizontal connecting section 3303 and the descending guide section 3301, between the descending guide section 3301 and the ascending guide section 3302, and between the ascending guide section 3302 and the horizontal connecting section 3303.

[0084] In some embodiments, as Figure 8 As shown, the telescopic member 332 further includes a rolling member 3323 ; the rolling member 3323 is connected to the lifting frame 3322 , and the rolling member 3323 is in rolling contact with the annular track 3312 .

[0085] It can be understood that by setting the rolling contact between the rolling element 3323 and the annular track 3312, it is ensured that the annular track 3312 can drive the lifting frame 3322 to rise and fall relative to the fixed frame 3321 through the rolling element 3323, and that the lifting frame 3322 can move smoothly relative to the annular track 3312 along the extension direction of the annular track 3312.

[0086] In some examples, the rolling element 3323 includes two rollers, which are arranged opposite to each other and clamped on the peripheral wall of the annular track 3312. The wheel edge of each roller is in rolling contact with the annular track 3312. The wheel edge of each roller can be provided with an annular groove adapted to the peripheral wall of the annular track 3312, and the annular groove is extended along the circumference of the roller.

[0087] In some examples, the rolling member 3323 includes a roller, which is arranged on the lower side of the annular track 3312, and the wheel edge of the roller is in contact with the peripheral wall of the annular track 3312; at this time, the telescopic member 332 can also be provided with an elastic member, which is arranged between the fixed frame 3321 and the lifting frame 3322.

[0088] During the movement of the roller along the descending guide section 3301, the descending guide section 3301 drives the lifting frame 3322 to descend relative to the fixed frame 3321 through the roller, and the elastic member is gradually compressed or stretched until it is in a compressed state or a stretched state; during the movement of the roller along the ascending guide section 3302, the elastic member recovers from the compressed state or the stretched state to a natural deformation state, thereby driving the lifting frame 3322 to ascend relative to the fixed frame 3321.

[0089] Furthermore, if Figure 7 and Figure 8 As shown, in order to facilitate the mutual cooperation between the annular track 3312 and the rolling element 3323 to guide the lifting frame 3322 to rise and fall relative to the fixed frame 3321, when the fixed frame 3321, the lifting frame 3322 and the rolling element 3323 are installed and arranged, the upper end of the fixed frame 3321 is connected to the annular conveyor chain 3311, and the lower end of the fixed frame 3321 is slidably matched with the lifting frame 3322; the lifting frame 3322 is arranged on one side of the fixed frame 3321, and the rolling element 3323 is arranged at the upper end of the lifting frame 3322, and is located on the side of the lifting frame 3322 away from the fixed frame 3321, and the lower end of the lifting frame 3322 is in contact with or separated from the U-shaped gasket 10.

[0090] In some embodiments, as Figure 8 As shown, in order to ensure the stability of the lifting frame 3322 relative to the fixed frame 3321, the lifting frame 3322 includes a first connecting plate, a second connecting plate and a plurality of guide rods;

[0091] The fixing frame 3321 is provided with a plurality of guide sleeves, which are arranged side by side. A plurality of guide rods are correspondingly passed through the plurality of guide sleeves, and each guide rod extends in a vertical direction.

[0092] The first connecting plate is connected to the upper end of each guide rod respectively, and the rolling member 3323 is connected to the first connecting plate; the second connecting plate is connected to the lower end of each guide rod respectively, and the second connecting plate is configured to contact or separate from the U-shaped gasket 10.

[0093] In some embodiments, as Figure 6 and Figure 10 As shown, the gasket conveying line 32 includes a first line body 321 and a second line body 322;

[0094] The first line body 321 and the second line body 322 are spaced apart from each other and arranged side by side. A clamping section for clamping the U-shaped gasket 10 is formed between the first line body 321 and the second line body 322 . The clamping section is arranged on the upper side of the box conveying line 31 .

[0095] It is understandable that since the initial form of the U-shaped gasket 10 is a flat form, after the U-shaped gasket 10 is folded, the second area 102 and the third area 103 of the U-shaped gasket 10 both tend to return to a flat form, which makes the first wire body 321 and the second area 102 of the U-shaped gasket 10, as well as the second wire body 322 and the third area 103 of the U-shaped gasket 10 have a larger contact friction force, so that the U-shaped gasket 10 will not fall from between the first wire body 321 and the second wire body 322 under the action of its own gravity when it is clamped in the clamping interval.

[0096] In practical applications, such as Figure 2 and Figure 6 As shown, the first wire body 321 abuts against the second area 102 of the U-shaped gasket 10, and the second wire body 322 abuts against the third area 103 of the U-shaped gasket 10. The first wire body 321 and the second wire body 322 cooperate with each other to jointly drive the U-shaped gasket 10 to move along the conveying direction of the box conveyor line 31.

[0097] The width of the clamping zone is adapted to the width of the first region 101 of the U-shaped gasket 10 .

[0098] Furthermore, in order to facilitate the conveying of the U-shaped gasket 10, the first line body 321 and the second line body 322 are both belt conveying mechanisms, and the conveying surface of the belt conveying mechanism is vertically distributed.

[0099] Specifically, since the U-shaped gasket 10 is clamped between the first wire body 321 and the second wire body 322, the conveying surface corresponding to the first wire body 321 is conveyed in a counterclockwise direction, and the conveying surface corresponding to the second wire body 322 is conveyed in a clockwise direction, the first wire body 321 and the second wire body 322 cooperate with each other to drive the U-shaped gasket 10 to move along the conveying direction of the box conveyor line 31.

[0100] In some embodiments, as Figure 11 and Figure 12 As shown, the box conveyor line 31 includes a main line body 311, a guardrail 312 and a limit assembly 313;

[0101] The main line body 311 is used to support the bottom of the box body 20 to realize the transportation of the box body 20; the guardrails 312 are provided on both sides of the main line body 311 and are configured to contact the side walls of the box body 20 to correct the placement of the box body 20 on the main line body 311;

[0102] The limiting component 313 includes a first limiting member 3131 and a second limiting member 3132, and the first limiting member 3131 and the second limiting member 3132 are relatively arranged on both sides of the main line body 311; the first limiting member 3131 is configured to contact the left swing cover 201 of the box body 20 to limit the folding angle of the left swing cover 201 toward the outside of the box body 20; the second limiting member 3132 is configured to contact the right swing cover 202 of the box body 20 to limit the folding angle of the right swing cover 202 toward the outside of the box body 20.

[0103] It is understandable that the main line body 311 includes a second frame and a conveyor chain arranged on the second frame. Two conveyor chains can be set, and the two conveyor chains are arranged side by side. The two conveyor chains are supported on the bottom of the box body 20 to realize the conveyance of the box body 20.

[0104] The left swing cover 201 and the right swing cover 202 are two swing covers along the width direction of the box body 20, and the width direction of the box body 20 is perpendicular to the conveying direction of the main line body 311; the folding angle α of the left swing cover 201 toward the outside of the box body 20 can be 120º~150º, and the folding angle β of the right swing cover 202 toward the outside of the box body 20 can be 120º~150º.

[0105] Two guardrails 312 are provided, one on each side of the main line 311 and connected to the second frame. The spacing between the two guardrails 312 matches the width of the box 20. Thus, the two guardrails 312 ensure that the length of the box 20 remains consistent with the conveying direction of the main line 311 when the box 20 is transported on the main line 311, and the placement of the box 20 on the main line 311 is not affected by external forces.

[0106] Furthermore, the first limiting member 3131 and the second limiting member 3132 have the same structure, and can be configured to include two limiting rods arranged side by side, with a limiting gap formed between the two limiting rods, and each limiting rod extending along the conveying direction of the main line body 311. The left swing cover 201 of the box body 20 is inserted into the limiting gap of the first limiting member 3131, and the right swing cover 202 of the box body 20 is inserted into the limiting gap of the second limiting member 3132.

[0107] As can be seen from the above, by limiting the left swing cover 201 and the right swing cover 202 of the box body 20 through the limiting component 313, it can be ensured that the open end above the box body 20 remains open. This design facilitates the packing operation of the U-shaped gasket 10.

[0108] like Figure 3 and Figure 13 As shown, this embodiment also provides a folding device 2 for automatically folding the U-shaped gasket 10, the folding device 2 comprising: a conveying line 21, a pressing component 22 and a folding component 23;

[0109] The conveyor line 21 is used to support the U-shaped gasket 10 and convey the U-shaped gasket 10 to the lower side of the pressing assembly 22. The pressing assembly 22 is used to press the first area 101 of the U-shaped gasket 10.

[0110] The folding assembly 23 includes a first rotary driving member 231, a first dial 232, and a second dial 233. The first rotary driving member 231 is in transmission connection with the first dial 232 and the second dial 233, respectively. The first dial 232 and the second dial 233 are spaced apart from each other and are disposed opposite to each other on either side of the conveyor line 21.

[0111] The first dial 232 is used to drive the second area 102 of the U-shaped gasket 10 to fold upward relative to the first area 101 , and the second dial 233 is used to drive the third area 103 of the U-shaped gasket 10 to fold upward relative to the first area 101 .

[0112] It is understandable that the conveyor line 21 includes a third frame and a conveyor chain arranged on the third frame. Two conveyor chains can be set, and the two conveyor chains are arranged side by side. The two conveyor chains are supported on the first area 101 of the U-shaped gasket 10 to realize the conveyance of the U-shaped gasket 10.

[0113] In actual application, the pressing component 22 has a pressing part, which is in flexible contact with the first area 101 of the U-shaped gasket 10. The pressing part presses the U-shaped gasket 10 against the conveyor line 21 and also ensures that the U-shaped gasket 10 can move forward under the conveyance of the conveyor line 21.

[0114] At the same time, the projection of the pressing part along the vertical direction is located between the projection of the first dial 232 and the second dial 233 along the vertical direction. This design allows the pressing component 22 to press the first area 101 of the U-shaped gasket 10 while the first dial 232 and the second dial 233 of the folding component 23 can be used to fold the second area 102 and the third area 103 of the U-shaped gasket 10.

[0115] Furthermore, the first rotating drive member 231 can adopt a reduction motor, and the first rotating drive member 231 is used to drive the first dial 232 and the second dial 233 to rotate; the wheel edge of the first dial 232 can contact the second area 102 of the U-shaped gasket 10, and the first dial 232 drives the second area 102 of the U-shaped gasket 10 to fold upward relative to the first area 101 during the rotation; accordingly, the wheel edge of the second dial 233 can contact the third area 103 of the U-shaped gasket 10, and the second dial 233 drives the third area 103 of the U-shaped gasket 10 to fold upward relative to the first area 101 during the rotation.

[0116] The first dial 232 and the second dial 233 can be configured to rotate in the same or different rotation directions; when the rotation directions of the first dial 232 and the second dial 233 are the same, the first dial 232 and the second dial 233 can be configured to rotate synchronously or asynchronously, and there is no specific limitation on this, as long as the U-shaped gasket 10 can be completed.

[0117] As can be seen from the above, the folding device 2 shown in the present invention, by setting a pressing component 22 and a folding component 23 based on the conveyor line 21, can use the pressing component 22 to press the first area 101 of the U-shaped gasket 10 when the conveyor line 21 conveys the flat U-shaped gasket 10 to the bottom of the pressing component 22, and then use the first dial 232 and the second dial 233 of the folding component 23 to apply force to the second area 102 and the third area 103 of the U-shaped gasket 10 respectively, so as to fold the flat U-shaped gasket 10 into a U-shaped shape. The entire folding process does not require human participation. This folding setting is not only low-cost, but also ensures the folding efficiency of the U-shaped gasket 10, and is convenient for folding large quantities of U-shaped gaskets 10 in sequence.

[0118] In some embodiments, as Figure 13 and Figure 14 As shown, the pressing assembly 22 includes a first bracket 221 and a pressing wheel assembly 222;

[0119] The pressing wheel assembly 222 is connected to the first bracket 221 and is located on the upper side of the conveyor line 21;

[0120] The pressure wheel assembly 222 includes a plurality of pressure wheels, which are arranged along the conveying direction of the conveyor line 21 , and each pressure wheel is used for rolling contact with the first area 101 of the U-shaped gasket 10 .

[0121] It is understandable that the first bracket 221 may be a gantry, and the first bracket 221 spans the upper side of the conveyor line 21 .

[0122] The pressure wheel assembly 222 includes a transfer seat and multiple pressure wheels. The transfer seat is connected to the crossbeam of the first bracket 221. The multiple pressure wheels are arranged at the bottom end of the transfer seat and are configured to be arranged in sequence along the conveying direction of the conveyor line 21.

[0123] Based on the design of the pressing component 22 , the pressing efficiency of the U-shaped gasket 10 is ensured while the normal conveying of the U-shaped gasket 10 by the conveying line 21 is not affected.

[0124] In some embodiments, the pressure wheel assembly 222 also includes a lifting adjustment member; the lifting adjustment member is connected to the first bracket 221, and multiple pressure wheels are arranged on the lower side of the lifting adjustment member, and the lifting adjustment member is used to control the contact or separation between the pressure wheel and the surface of the U-shaped gasket 10.

[0125] It is understandable that the lifting and adjusting member can be an electric push rod or a screw adjustment mechanism. By arranging each pressure wheel through the lifting and adjusting member, it is convenient to adaptively adjust the width of the gap between the wheel edge of the pressure wheel and the conveying surface of the conveyor line 21 according to the thickness of the U-shaped gasket 10, ensuring that the width of the gap is adapted to the thickness of the U-shaped gasket 10. This design ensures the pressing effect of the pressure wheel on the U-shaped gasket 10.

[0126] In some embodiments, as Figure 13 and Figure 15 As shown, the folding assembly 23 further includes a transmission shaft 234 and an adjustment assembly 235;

[0127] The transmission shaft 234 is provided through the conveyor line 21. The first and second paddle wheels 232 and 233 are sleeved on both ends of the transmission shaft 234. At least one of the first and second paddle wheels 232 and 233 is movably provided on the transmission shaft 234 along the axial direction of the transmission shaft 234.

[0128] The first rotary driving member 231 is connected to the transmission shaft 234, and the transmission shaft 234 is used to drive the first dial 232 and the second dial 233 to rotate synchronously; the adjustment component 235 is connected to the first dial 232 and the second dial 233 respectively, and the adjustment component 235 is used to adjust the distance between the first dial 232 and the second dial 233.

[0129] It is understandable that the transmission shaft 234 is rotatably provided on the third frame corresponding to the conveyor line 21 , and based on the transmission shaft 234 , the first paddle wheel 232 and the second paddle wheel 233 can be arranged on both sides of the conveyor line 21 .

[0130] The first rotary driving member 231 is used to drive the transmission shaft 234 to rotate, and the transmission shaft 234 then drives the first dial 232 and the second dial 233 to rotate synchronously. This design facilitates the use of the first dial 232 and the second dial 233 to synchronously fold the second area 102 and the third area 103 of the U-shaped gasket 10.

[0131] At the same time, the circumferential wall of the transmission shaft 234 can be provided with a first protrusion and a second protrusion, each extending axially along the transmission shaft 234. The inner wall of the central hole of the first dial 232 can be provided with a first groove, and the inner wall of the central hole of the second dial 233 can be provided with a second groove, with the first protrusion inserted into the first groove and the second protrusion inserted into the second groove. This design ensures that the transmission shaft 234 can drive the first dial 232 and the second dial 233 to rotate synchronously, and also ensures that the first dial 232 and the second dial 233 can be movably arranged on the transmission shaft 234 along the axial direction of the transmission shaft 234.

[0132] Since the models of the boxes 20 are different, the sizes of the U-shaped gaskets 10 corresponding to the different models of boxes 20 are also different. Therefore, the distance between the first dial wheel 232 and the second dial wheel 233 is adjusted by the adjustment component 235 to facilitate folding of U-shaped gaskets 10 of different sizes.

[0133] In practical applications, the adjustment assembly 235 includes a screw adjustment mechanism, a first linkage plate, and a second linkage plate; the screw adjustment mechanism includes a screw motor, a screw, a first screw nut, and a second screw nut;

[0134] The lead screw motor is connected to the lead screw, which extends along the width direction of the conveyor line 21 and is rotatably arranged on the third frame corresponding to the conveyor line 21; the lead screw includes a first thread segment and a second thread segment connected to each other, and the rotation direction of the threads of the first thread segment and the second thread segment are different, and the first lead screw nut and the second lead screw nut are respectively slidably matched with the third frame in the extension direction of the lead screw; the first lead screw nut and the first thread segment are threadedly matched, and are connected to the first linkage plate, and the first linkage plate is connected to the first thumbwheel 232; the second lead screw nut and the second thread segment are threadedly matched, and are connected to the second linkage plate, and the second linkage plate is connected to the second thumbwheel 233.

[0135] In this way, the first linkage plate and the second linkage plate can be controlled to synchronously approach or move away from the conveyor line 21 through the screw adjustment mechanism, and then the first linkage plate and the second linkage plate drive the first dial 232 and the second dial 233 to synchronously approach or move away from the conveyor line 21, thereby adjusting the distance between the first dial 232 and the second dial 233.

[0136] In some embodiments, as Figure 15 As shown, the first dial wheel 232 and the second dial wheel 233 have the same structure, both including a wheel disc and a plurality of dial teeth;

[0137] A plurality of shifting teeth are sequentially spaced along the circumference of the wheel disc, and each shifting tooth has an oblique tooth surface that contacts the U-shaped gasket 10;

[0138] Wherein, along the extension direction of the oblique tooth surface, the radial distance between each position on the oblique tooth surface and the center of the wheel disc gradually decreases.

[0139] It can be understood that the various shift teeth are distributed in a centrally symmetrical manner relative to the center of the wheel disc, and the bevel tooth surface of each shift tooth has a first end and a second end. Along the extension direction from the first end to the second end, the radial distance of each position on the bevel tooth surface relative to the center of the wheel disc gradually decreases.

[0140] During the process of folding the second area 102 or the third area 103 of the U-shaped gasket 10, as the wheel rotates, the first end of the bevel tooth surface first abuts against the surface of the U-shaped gasket 10, then the middle area of ​​the bevel tooth surface abuts against the surface of the U-shaped gasket 10, and then the second end of the bevel tooth surface abuts against the surface of the U-shaped gasket 10 until the second end of the bevel tooth surface is separated from the U-shaped gasket 10.

[0141] Since the U-shaped gasket 10 is also being transported forward by the conveyor line 21 during the process of being folded by the first dial 232 and the second dial 233, the utility model designs the structure of the dial teeth, which can ensure the folding force of the U-shaped gasket 10 in the initial stage, and can also ensure that the U-shaped gasket 10 is stably placed on the conveyor line 21 at the end stage of the folding.

[0142] In some embodiments, as Figure 10 and Figure 13 As shown, the folding device 2 further includes: a positioning assembly and a guiding assembly 236;

[0143] The positioning assembly is provided on the conveying line 21 and is used to limit the first area 101 of the U-shaped gasket 10 on the conveying line 21;

[0144] The guide assembly 236 is disposed at the rear side of the folding assembly 23 along the conveying direction of the conveyor line 21. The guide assembly 236 includes a first guide rod 2361 and a second guide rod 2362. The first guide rod 2361 and the second guide rod 2362 are spaced apart from each other and are disposed on both sides of the conveyor line 21 and the gasket conveyor line 32. The gasket conveyor line 32 is connected to the conveyor line 21 and extends in the same direction.

[0145] The first guide rod 2361 is used to guide the second region 102 of the U-shaped gasket 10 to a vertical state, and the second guide rod 2362 is used to guide the third region 103 of the U-shaped gasket 10 to a vertical state.

[0146] Specifically, the positioning assembly includes a first positioning unit and a second positioning unit, which are arranged on the conveying line 21 at intervals along the conveying direction of the conveying line 21, and the spacing between the first positioning unit and the second positioning unit is adapted to the length of the U-shaped gasket 10 along the conveying direction of the conveying line 21.

[0147] Among them, the first positioning unit and the second positioning unit have the same structure and can be configured as two positioning protrusions, and the two positioning protrusions are arranged along the width direction of the conveyor line 21; the two positioning protrusions are spaced from each other, and the spacing between the two positioning protrusions is adapted to the width of the first area 101 of the U-shaped gasket 10.

[0148] In actual application, the first area 101 of the U-shaped gasket 10 is limited to the conveyor line 21 through the positioning component, and the U-shaped gasket 10 can be placed to move relative to the conveyor line 21 under the action of the guide component 236. In this way, in the process of the U-shaped gasket 10 being conveyed forward along the conveyor line 21, it is convenient to use the first guide rod 2361 and the second guide rod 2362 to control the folding state of the second area 102 and the third area 103 of the U-shaped gasket 10 respectively, to ensure that the second area 102 of the U-shaped gasket 10 is vertically distributed relative to the horizontally set first area 101, and to ensure that the third area 103 of the U-shaped gasket 10 is also vertically distributed relative to the horizontally set first area 101.

[0149] Furthermore, if Figure 10 As shown, in order to facilitate the control of the folding state of the second area 102 and the third area 103 of the U-shaped gasket 10, the first guide rod 2361 and the second guide rod 2362 each include a first rod segment and a second rod segment;

[0150] The first rod segment is tilted relative to the conveying direction of the conveyor line 21, and the distance between the first end of the first rod segment and the conveyor line 21 is greater than the distance between the second end of the first rod segment and the conveyor line 21;

[0151] The second end of the first rod segment is connected to the first end of the second rod segment. The second end of the second rod segment extends along the conveying direction of the conveying line 21 toward a side of the first rod segment away from the folding assembly 23 .

[0152] The first guide rod 2361 may be disposed on the first line body 321 of the gasket conveying line 32 , and the second guide rod 2362 may be disposed on the second line body 322 of the gasket conveying line 32 .

[0153] In some embodiments, such as Figure 3 、 Figure 13 and Figure 16 As shown, the folding device 2 also includes: a loading component 24, which is arranged on the front side of the folding component 23 along the conveying direction of the conveyor line 21; the loading component 24 is used to pick up the U-shaped gasket 10 and place the U-shaped gasket 10 on the conveyor line 21.

[0154] The loading component 24 may be a mechanical claw, and the loading component 24 is used to pick up the U-shaped gasket 10 in a flat form from the feeding bin 1 and place the U-shaped gasket 10 in a flat form on the conveyor line 21 .

[0155] Furthermore, if Figure 16 As shown, the loading assembly 24 includes a second bracket 241, a second rotary drive member 242, a rotating frame 243 and a suction nozzle assembly 244;

[0156] The rotating frame 243 is rotatably disposed on the second bracket 241, and the suction nozzle assembly 244 is disposed on the rotating frame 243; the second rotating driving member 242 is disposed on the second bracket 241 and is connected to the rotating frame 243; the second rotating driving member 242 is used to drive the rotating frame 243 to drive the suction nozzle assembly 244 to rotate, so that the suction nozzle assembly 244 is close to or away from the conveyor line 21; the suction nozzle assembly 244 is used to adsorb or release the U-shaped gasket 10.

[0157] Specifically, the second bracket 241 is disposed at one side of the conveyor line 21 , and the second rotation driving member 242 is disposed at the top of the second bracket 241 . The second rotation driving member 242 may be a servo motor.

[0158] The rotating frame 243 includes a central axis and multiple connecting arms. The central axis is rotatably arranged at the top of the second bracket 241. The central axis is horizontally arranged. The multiple connecting arms are respectively connected to the central axis and are evenly arranged along the circumferential direction relative to the central axis.

[0159] The suction nozzle assembly 244 includes a plurality of suction units, each of which is connected to a plurality of connecting arms in a one-to-one correspondence. Each suction unit includes a support rod and a plurality of negative pressure suction nozzles. The support rod and the connecting arms are connected and extend horizontally, and the negative pressure suction nozzles are sequentially spaced along the extension direction of the support rod. Each negative pressure suction nozzle can be configured to be movably mounted on the support rod along the extension direction of the support rod, so that the spacing between two adjacent negative pressure suction nozzles can be easily adjusted.

[0160] In actual application, the second rotating drive member 242 can drive the rotating frame 243 according to the set angle, and the rotating frame 243 drives each adsorption unit to rotate in sequence. This design enables one of the adsorption units to take material from the feeding bin 1, and the other adsorption unit will place the picked-up horizontally on the U-shaped gasket 10 and place it on the conveyor line 21, ensuring the feeding efficiency of the U-shaped gasket 10.

[0161] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A U-shaped gasket automatic packing device, characterized in that: include: Box conveyor line, gasket conveyor line and pressing mechanism; The box conveying line is arranged at the lower side of the gasket conveying line, and the box conveying line is used to convey boxes with the opening facing upward; the gasket conveying line is used to convey the U-shaped gaskets; The pressing mechanism includes an annular line body and a plurality of telescopic members, a portion of the annular line body being arranged on the upper side of the gasket conveying line along the extension direction of the gasket conveying line; the plurality of telescopic members being arranged in sequence and spaced apart along the extension direction of the annular line body, and the annular line body being used to drive each of the telescopic members to move along the extension direction thereof; Wherein, the telescopic member is used to press the U-shaped gasket conveyed by the gasket conveying line into the box conveyed by the box conveying line.

2. The automatic packing device for U-shaped gaskets according to claim 1, characterized in that: The annular line body includes an annular conveying chain and an annular track, and the annular track is extended along the extension direction of the annular conveying chain; The telescopic member includes a fixed frame and a lifting frame, the lifting frame is movably provided on the fixed frame along the vertical direction, and the fixed frame is connected to the endless conveying chain; The annular track is connected to the lifting frame to guide the lifting frame to rise and fall relative to the fixed frame; the lifting frame is configured to press the U-shaped gasket into the box body during the descending process.

3. The automatic packing device for U-shaped gaskets according to claim 2, characterized in that: The annular track includes a descending guide section, an ascending guide section and a horizontal connecting section; The descending guide section, the ascending guide section and the horizontal connecting section are connected end to end in sequence, and the descending guide section and the ascending guide section are located on the upper side of the gasket conveying line; The descending guide section is used to guide the lifting frame to move downward relative to the fixed frame, and the ascending guide section is used to guide the lifting frame to move upward relative to the fixed frame.

4. The automatic packing device for U-shaped gaskets according to claim 2, characterized in that: The telescopic member further includes a rolling member; the rolling member is connected to the lifting frame, and the rolling member is in rolling contact with the annular track.

5. The automatic packing device for U-shaped gaskets according to claim 4, characterized in that: The upper end of the fixing frame is connected to the annular conveying chain, and the lower end of the fixing frame is in sliding cooperation with the lifting frame; The lifting frame is arranged on one side of the fixing frame, the rolling element is arranged on the upper end of the lifting frame and located on the side of the lifting frame away from the fixing frame, and the lower end of the lifting frame contacts or separates from the U-shaped gasket.

6. The automatic packing device for U-shaped gaskets according to claim 4, characterized in that: The lifting frame includes a first connecting plate, a second connecting plate and a plurality of guide rods; The fixing frame is provided with a plurality of guide sleeves, the plurality of guide sleeves are arranged side by side, the plurality of guide rods are passed through the plurality of guide sleeves in a one-to-one correspondence, and each guide rod extends in a vertical direction; The first connecting plate is connected to the upper end of each guide rod respectively, and the rolling element is connected to the first connecting plate; the second connecting plate is connected to the lower end of each guide rod respectively, and the second connecting plate is configured to contact or separate from the U-shaped gasket.

7. The automatic packing device for U-shaped gaskets according to any one of claims 1 to 6, characterized in that: The gasket conveying line includes a first line body and a second line body; The first line body and the second line body are spaced apart from each other and arranged side by side; a clamping section for clamping the U-shaped gasket is formed between the first line body and the second line body, and the clamping section is arranged on the upper side of the box conveying line.

8. The automatic packing device for U-shaped gaskets according to claim 7, characterized in that: The first line body and the second line body are both belt conveyor mechanisms, and the conveying surfaces of the belt conveyor mechanisms are vertically distributed.

9. The automatic packing device for U-shaped gaskets according to any one of claims 1 to 6, characterized in that: The box conveyor line includes a main line body and guardrails; The main line body is used to support the bottom of the box body to realize the transportation of the box body; the guardrails are arranged on both sides of the main line body and are configured to contact the side walls of the box body to correct the placement posture of the box body on the main line body.

10. The automatic packing device for U-shaped gaskets according to claim 9, characterized in that: The box conveyor line further includes a limit assembly; the limit assembly includes a first limit member and a second limit member, the first limit member and the second limit member are relatively arranged on both sides of the main line body; The first limiting member is configured to contact the left swing cover of the box body to limit the folding angle of the left swing cover toward the outside of the box body; the second limiting member is configured to contact the right swing cover of the box body to limit the folding angle of the right swing cover toward the outside of the box body.

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