Carton folding conveying device

Abstract

The present invention relates to the technical field of carton folding, and specifically discloses a carton folding conveying device, wherein a positioning frame is sleeved on the outer peripheral side of the positioning frame and can move up and down, the positioning frame is a square structure, the folding assembly has four groups, and is respectively arranged at the four sides of the circumference of the positioning frame, the folding assembly comprises a rotating shaft, a gear 1, a gear 2, a rack, a torsion spring and a strut, the rotating shaft is rotatably installed on the inner side of the positioning frame, the gear is coaxially fixedly installed on the rotating shaft, the strut is fixedly connected to the rotating shaft, the two ends of the torsion spring are respectively connected to the rotating shaft and the strut, the gear 2 is rotatably installed on the positioning frame and meshes with the gear 1, the rack is arranged on the inner side surface of the positioning frame, when the positioning frame moves downward, the rack can mesh with the gear 2, and the driving assembly 1 can drive the positioning frame to move downward; the present invention can make the four folding leaves at the upper end of the carton in a tilted downward state before loading articles into the carton, so as to facilitate the loading of articles.

Description

Technical Field

[0001] The present invention relates to the technical field of carton folding, and in particular to a carton folding conveying device. Background Art

[0002] After the factory completes the processing of the product, it generally needs to use folding cartons to package the items. This type of folding carton is packaged by folding. Under normal circumstances, the bottom of the carton is closed, and then the top is used to store the items, and then the top is folded and packaged. After packaging, the carton is transported. When the bottom of the carton is closed, the fold at the top of the carton is generally in a vertical state. At this time, when loading larger items into the carton, or when mechanical equipment is needed to load items, the fold in a vertical state will affect the loading of the items.

[0003] A patent document with announcement number CN220350103U discloses a carton folding conveying device, including a conveying platform and side frames, side frames are set up on both sides of the conveying platform, multiple groups of conveying shafts are movably installed in the conveying platform, and rollers are fixedly sleeved on the outside of the conveying shafts, and a conveying motor is installed on the outer wall of the conveying platform, and a conveying belt is arranged between the output shaft of the conveying motor and the conveying shaft. The carton folding conveying device is provided with a pressing cylinder, a piston rod, and a pressing block. The device uses two groups of pressing cylinders to drive the piston rod to extend in the feeding direction, driving the pressing block to descend, thereby pressing down the two groups of carton foldings of the packaging carton. When the carton foldings are pressed to the horizontal, the suction cup generator is started, and the vacuum suction cup generates a high-strength negative pressure airflow to suck the carton foldings, so that the two groups of carton foldings are always kept open. The pressing cylinder only needs to be pressed down once in the feeding direction, which solves the problem of continuous pressing.

[0004] The above technical solution can only press down one group of two opposite folds in the carton during folding and conveying, while the other group of two opposite folds is still in a vertical state, which causes inconvenience to the loading of articles. Summary of the invention

[0005] The present invention provides a carton folding and conveying device, aiming to solve the technical problem in the related art that the folding at the upper end of the carton in a vertical state will affect the loading of articles.

[0006] A carton folding conveying device comprises a frame and a conveying mechanism, wherein the frame is arranged at the conveying starting end of the conveying mechanism, and further comprises a positioning frame, a positioning frame, a folding assembly and a driving assembly 1, wherein the positioning frame is arranged at the upper part of the frame, the positioning frame is sleeved on the outer peripheral side of the positioning frame and can move up and down, the positioning frame is a square structure, the folding assembly has four groups, and is respectively arranged at the four sides of the circumference of the positioning frame, the folding assembly comprises a rotating shaft, a gear 1, a gear 2, a rack, a torsion spring and a strut, the rotating shaft is rotatably mounted on the inner side of the positioning frame, the gear is coaxially fixedly mounted on the rotating shaft, the strut is fixedly connected to the rotating shaft, the two ends of the torsion spring are respectively connected to the rotating shaft and the strut, so that one end of the strut faces the inner side of the positioning frame, the gear 2 is rotatably mounted on the positioning frame and meshes with the gear 1, the rack is arranged at the inner side surface of the positioning frame, when the positioning frame moves downward, the rack can mesh with the gear 2, and the driving assembly 1 can drive the positioning frame to move downward.

[0007] The beneficial effects of the present invention are as follows: the present invention controls the driving component 1 to drive the positioning frame to move downward, and through the meshing of the rack set on the inner side of the positioning frame and the gear 2, the meshing of the gear 2 and the gear 1 can drive the support rod to rotate, and can push the hinge to flip outward until the positioning frame is sleeved on the outer peripheral side of the four hinges, so that before the items are loaded into the carton, the four hinges at the upper end of the carton are in a tilted downward state, which is convenient for loading the items.

[0008] Preferably, a stopper is elastically mounted on the positioning frame, and the stopper can stop against the lower part of the positioning frame. When the positioning frame moves downward, the stopper can detach from the lower part of the positioning frame, thereby achieving the effect that the stopper can block and limit the multiple positioning frames mounted on the positioning frame, and when the driving component drives the lowermost positioning frame to move downward, the stopper can continue to prevent the remaining positioning frames from falling.

[0009] Preferably, the abutment point between the stopper and the positioning frame is an inclined surface.

[0010] Preferably, the driving component 1 has two groups, and the two groups of driving components 1 are respectively arranged on both sides of the positioning frame, and the driving component 1 includes a fixing frame, a supporting member, a clamping member and a driving member 1, the fixing frame is fixedly installed on the upper part of the frame body, the supporting member is connected to the fixing frame for sliding up and down, the clamping member is connected to the supporting member for sliding, and the positioning frame is provided with a slot adapted to the clamping member, the clamping member can be clamped in the slot, and the driving member 1 can drive the clamping member to approach or move away from the positioning frame, and after the clamping member is clamped in the slot, the driving member 1 can drive the positioning frame to move downward.

[0011] Preferably, an inclined surface inclined upward is provided at the end of the clamping member facing the positioning frame, which has the effect of facilitating the clamping member to enter and exit the clamping slot.

[0012] Preferably, the positioning frame includes four side panels, the four side panels are arranged opposite to each other in pairs, and the surfaces where the four side panels are located form a rectangular structure. A driving component 2 is also provided on the upper part of the frame body, and the driving component 2 can drive the two opposite side panels to move closer to or away from each other. The effect is that by controlling the two opposite side panels to move closer to or away from each other, the positioning frame can adapt to positioning frames of different sizes.

[0013] Preferably, the second driving component includes a screw, a threaded sleeve, a second connecting rod and a second driving member, the screw is vertically arranged on the inner side of the positioning frame, the threaded sleeve is threadedly engaged with the outer peripheral side of the screw, and a second connecting rod is provided between the threaded sleeve and each of the side plates, and the two ends of the second connecting rod are respectively hinged to the threaded sleeve and the side plate, so that when the threaded sleeve is raised or lowered, the two opposite side plates can be driven to move closer to or away from each other, and the second driving member is fixedly mounted on the upper part of the frame and can drive the screw to rotate.

[0014] Preferably, a ring sleeve is rotatably mounted on the screw rod, and a telescopic rod is provided between the ring sleeve and each of the side plates. The telescopic rod is horizontally arranged, and two ends thereof are fixedly connected to the ring sleeve and the side plates respectively.

[0015] Preferably, an opening is provided at one corner of the positioning frame, which has the effect of enabling a screw rod to pass through the opening so as to facilitate control of the positioning frame to be sleeved on the positioning frame.

[0016] By adopting the above technical scheme, the beneficial effects of the present invention are as follows: the present invention controls the driving component 1 to drive the positioning frame to move downward, and the rack arranged on the inner side of the positioning frame is meshed with the gear 2, so that the gear 2 and the gear 1 are meshed, which can drive the support rod to rotate, and can push the vertical hinge at the upper end of the carton to flip it outward, and then the downward-moving positioning frame will contact the inner side of the four hinges flipped outward, and as the positioning frame continues to move downward, it will drive the hinges to flip to a tilted downward state, and the positioning frame will be sleeved on the outer peripheral side of the four hinges, that is, the folding of the carton is completed, and the positioning frame can limit the hinges at the same time, so that before the items are loaded into the carton, the four hinges at the upper end of the carton are in a tilted downward state, which is convenient for loading the items. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the present invention.

[0018] Figure 2 It is a schematic diagram of the installation structure of the positioning frame and the positioning frame of the present invention.

[0019] Figure 3 It is a schematic diagram of the installation structure of the folding assembly of the present invention.

[0020] Figure 4 It is a schematic diagram of the installation structure of gear 2 of the present invention.

[0021] Figure 5 It is a structural schematic diagram of the positioning frame of the present invention.

[0022] Figure 6 It is a schematic structural diagram of a driving component 1 of the present invention.

[0023] Reference numerals:

[0024] 11. frame; 12. conveying mechanism; 13. positioning frame; 131. slot; 132. opening; 141. vertical rod; 142. horizontal rod; 2. positioning frame; 21. side plate; 211. through slot;

[0025] 31. Rotating shaft; 32. Gear 1; 33. Gear 2; 34. Rack; 35. Torsion spring; 36. Support rod;

[0026] 41. Stopper; 42. U-shaped frame; 43. Spring;

[0027] 51, fixing frame; 511, slide groove; 52, supporting member; 53, clamping member; 54, driving member 1; 55, connecting rod 1; 61, screw rod; 62, threaded sleeve; 63, connecting rod 2; 64, driving member 2;

[0028] 71. Ring sleeve; 72. Telescopic rod. DETAILED DESCRIPTION

[0029] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0030] like Figures 1 to 6 As shown, the carton folding and conveying device of the embodiment of the present invention includes a frame 11 and a conveying mechanism 12. The frame 11 is arranged at the conveying starting end of the conveying mechanism 12, and also includes a positioning frame 2, a positioning frame 13, a folding component and a driving component.

[0031] The positioning frame 2 is arranged on the upper part of the frame body 11, and the positioning frame 13 is sleeved on the outer peripheral side of the positioning frame 2 and can move up and down. The positioning frame 13 is a square structure. Specifically, the positioning frame 2 includes four side panels 21. The four side panels 21 are grouped in pairs, and the two side panels 21 in each group are arranged opposite to each other, and the surfaces where the four side panels 21 are located form a rectangular structure. A driving component 2 is also provided on the upper part of the frame body 11. The driving component 2 can drive the two opposite side panels 21 to move closer to or away from each other.

[0032] like Figure 2 As shown, a door frame is fixedly installed on the upper part of the frame body 11, and the door frame includes two vertical rods 141 and a cross bar 142 fixedly installed on the upper part of the two vertical rods 141. The vertical rod 141 is fixedly connected to the frame body 11. The second driving component includes a screw 61, a threaded sleeve 62, a second connecting rod 63 and a second driving member 64. The screw 61 is vertically arranged on the inner side of the positioning frame 2 and is rotatably connected to the cross bar 142. The threaded sleeve 62 is threadedly fitted on the outer peripheral side of the screw 61. A second connecting rod 63 is provided between the threaded sleeve 62 and each side plate 21. The two ends of the second connecting rod 63 are hinged to the threaded sleeve 62 and the side plate 21 respectively. The second driving member 64 is fixedly installed on the upper part of the cross bar 142. The second driving member 64 can be a motor and its output end is fixedly connected to the screw 61. The second driving member 64 is controlled to drive the screw 61 to rotate forward and reverse, which can drive the threaded sleeve 62 to move up and down. Through the second connecting rod 63, the two opposite side plates 21 of the four side plates 21 can be driven to move closer to or away from each other to adapt to positioning frames 13 of different sizes. The inner side surface of the positioning frame 13 fits with the outer side surface of the side plate 21.

[0033] The size of the positioning frame 13 needs to be selected according to the size of the carton, and the size of the positioning frame 13 should be slightly larger than the size of the port on the carton.

[0034] like Figure 2 As shown, a ring sleeve 71 is rotatably connected to the screw rod 61, and a telescopic rod 72 is provided between the ring sleeve 71 and each side plate 21. The telescopic rod 72 is horizontally arranged, and its two ends are respectively fixedly connected to the ring sleeve 71 and the side plate 21. The length direction of the telescopic rod 72 is in the same direction as the moving direction of the side plate 21, which can limit the movement of the side plate 21.

[0035] like Figures 2 to 5 As shown, the folding assembly has four groups, and is respectively arranged at the four sides of the positioning frame 2 in the circumferential direction. The folding assembly includes a rotating shaft 31, a gear 1 32, a gear 2 33, a rack 34, a torsion spring 35 and a strut 36. The rotating shaft 31 is rotatably installed on the inner side of the positioning frame 2, the gear 1 32 is coaxially fixedly installed on the rotating shaft 31, the strut 36 is fixedly connected to the rotating shaft 31, the torsion spring 35 is sleeved on the outer circumference of the rotating shaft 31 and its two ends are respectively connected to the rotating shaft 31 and the strut 36, so that one end of the strut 36 faces the inner side of the positioning frame 2, the gear 2 33 is rotatably installed on the positioning frame 2 and meshes with the gear 1 32, the rack 34 is arranged on the inner side of the positioning frame 13, and when the positioning frame 13 moves downward, the rack 34 can mesh with the gear 2 33, and the driving assembly 1 can drive the positioning frame 13 to move downward.

[0036] Specifically, the four groups of folding components correspond to the four side panels 21 one by one, the rotating shaft 31 is rotatably installed on the inner side surface of the side panel 21, the inner side surface of the side panel 21 has a height direction and a length direction, the length direction of the rotating shaft 31 is in the same direction as the length direction of the inner side surface of the side panel 21, the gear 1 32 is coaxially fixedly connected to the rotating shaft 31, the support rod 36 can be in a horizontal state under the action of the elastic force of the torsion spring 35, and its inner end faces the inner side of the positioning frame 2, a through groove 211 is opened on the side panel 21, the gear 2 33 is rotatably installed at the through groove 211, and a part of the gear 2 33 extends to the outside of the side panel 21 so that it can engage with the rack 34 arranged on the inner side surface of the positioning frame 13.

[0037] When folding, first select a positioning frame 13 that is slightly larger than the size of the upper port of the carton according to the size of the carton, and then control the second drive component 64 to adjust the spacing between the side panels 21 according to the size of the positioning frame 13, so that when the positioning frame 13 is sleeved on the outer peripheral side of the positioning frame 2, the inner side of the positioning frame 13 fits with the outer side of the side panel 21. In the initial state, the positioning frame 13 is located on the upper side of the second gear 33, and the support rod 36 is in a horizontal state. After the carton with the upper end folded vertically is placed on the frame 11 directly below the positioning frame 2, the control drive component 1 drives the positioning frame 13 to move downward. When the positioning frame 13 moves down to the second gear 33, the engagement of the second gear 33 and the rack 34 will drive the second gear 33 to rotate. Since the second gear 33 is engaged with the first gear 32, it will drive the gear 1 32, the rotating shaft 31 fixedly connected to the gear 1 32 and the support rod 36 fixedly connected to the rotating shaft 31 rotate, and the rotation direction of the support rod 36 is opposite to the rotation direction of the gear 2 33, that is, the inner end of the support rod 36 will rotate downward, and the torsion spring 35 will accumulate force. When the support rod 36 rotates to the inner end and stops against the inner side surface of the vertical hinge and continues to rotate, the hinge will be pushed to flip outward. At this time, the positioning frame 13 will move down to disengage from the gear 2 33. As the positioning frame 13 continues to move downward, the positioning frame 13 will contact the inner sides of the four hinges flipped outward. As the driving component 1 drives the positioning frame 13 to continue to move downward, the hinge will be driven to flip to a tilted downward state, and the positioning frame 13 will be sleeved on the outer peripheral side of the four hinges, that is, the folding of the carton is completed, and the positioning frame 13 can limit the folding.

[0038] When the rack 34 disposed on the inner side of the positioning frame 13 is out of mesh with the second gear 33 , the support rod 36 will return to its original position under the action of the torsion spring 35 .

[0039] In addition, after the carton is folded, the folded carton can be pushed onto the conveying mechanism 12 by the pushing mechanism, and the carton can be conveyed to the loading station for loading by the pushing mechanism. After the loading is completed, the positioning frame 13 can be removed and the carton can be sealed.

[0040] In some embodiments, Figures 2 to 4 As shown, a stopper 41 is elastically mounted on the positioning frame 2, and the stopper 41 can stop at the lower part of the positioning frame 13. When the positioning frame 13 moves downward, the stopper 41 can be detached from the lower part of the positioning frame 13, and the stopper 41 and the positioning frame 13 stop at an inclined surface.

[0041] Specifically, the length direction of the stopper 41 is arranged perpendicular to the side plate 21, and the stopper 41 moves through the side plate 21. A U-shaped frame 42 is fixedly connected to the inner side surface of the side plate 21, and a spring 43 is sleeved on the outer peripheral side of the stopper 41. The two ends of the spring 43 are respectively fixedly connected to the stopper 41 and the U-shaped frame 42 to realize the elastic connection between the stopper 41 and the side plate 21. Under the elastic push of the spring 43, part of the stopper 41 will extend outward from the side plate 21, and the end of the extended part is provided with an inclined surface inclined upward, which can stop against the bottom of the positioning frame 13.

[0042] When the present embodiment is in use, a plurality of positioning frames 13 are stacked up and down on the positioning frame 2, and the stopper 41 abuts against the bottom of the lowest positioning frame 13 to block and limit the plurality of positioning frames 13 on the positioning frame 2. When the driving component 1 drives the lowest positioning frame 13 to move downward, the positioning frame 13 abuts against the inclined surface on the stopper 41, which pushes the stopper 41 to move inwardly of the positioning frame 2, and the spring 43 is compressed until the stopper 41 no longer extends out of the positioning frame 2, and the lowest positioning frame 13 passes downward over the stopper 41, and then the stopper 41 extends out of the positioning frame 2 again under the elastic push of the spring 43, and continues to limit and block the remaining positioning frames 13 on the positioning frame 2.

[0043] Among them, the position of the stopper 41 corresponds to the position of the rack 34, and the inclined surface on the stopper 41 is opposite to the lower inclined surface of the lowermost tooth of the rack 34. Under the action of the two inclined surfaces, the stopper 41 can timely limit the positioning frame 13 when it returns to its original position.

[0044] In some embodiments, Figure 2 , Figure 5 and Figure 6 As shown, the driving component 1 has two groups, and the two groups of driving components 1 are respectively arranged on both sides of the positioning frame 2. The driving component 1 includes a fixed frame 51, a support member 52, a clamping member 53 and a driving member 1 54. The fixed frame 51 is fixedly installed on the upper part of the frame body 11. A slide groove 511 extending in the up and down directions is opened on the fixed frame 51. The support member 52 is slidably installed in the slide groove 511 up and down. There is a large friction force between the support member 52 and the fixed frame 51, that is, the friction force between the support member 52 and the fixed frame 51 is greater than the gravity of the support member 52, so that before the external force in the up and down directions on the support member 52 reaches the set value, the up and down position of the support member 52 can remain unchanged.

[0045] The clamping member 53 is slidably connected to the supporting member 52 and can be moved closer to or away from the positioning frame 2. A clamping groove 131 adapted to the clamping member 53 is provided on the positioning frame 13, and the clamping member 53 can be clamped in the clamping groove 131. The driving member 54 is a telescopic driving member. For example, the driving member 54 can be an electric push rod. The driving member 54 is installed in the slide groove 511, and its upper end is fixedly connected to the fixing frame 51. An inclined connecting rod 55 is provided between the driving member 54 and the clamping member 53, and the two ends of the connecting rod 55 are respectively hinged to the lower ends of the clamping member 53 and the driving member 54.

[0046] When the present embodiment is in use, the height of the clamping member 53 is the same as the height of the card slot 131, and the two correspond to each other. When it is necessary to drive the positioning frame 13 to move downward, the driving member 54 is controlled to extend. Since there is a large friction between the support member 52 and the fixing frame 51, the clamping member 53 will first be driven close to the positioning frame 13 through the connecting rod 55 until the clamping member 53 is inserted into the card slot 131. As the driving member 54 continues to extend, the clamping member 53, the positioning frame 13 and the support member 52 can be driven to move downward. After the positioning frame 13 is sleeved on the carton, the driving member 54 is controlled to contract. First, the clamping member 53 will be driven away from the positioning frame 13 and disengaged from the card slot 131, and then the clamping member 53 and the support member 52 can be driven to move upward to their original positions.

[0047] It is understandable that a damping member may be provided between the support member 52 and the fixing frame 51, which can also achieve the effect of keeping the vertical position of the support member 52 unchanged before the vertical external force applied to the support member 52 reaches a set value.

[0048] In some embodiments, Figure 5 and Figure 6 As shown, the end of the clamp 53 facing the positioning frame 2 is provided with an upwardly inclined inclined surface, which can facilitate the clamp 53 to enter and exit the slot 131, wherein the bottom surface of the end of the clamp 53 facing the positioning frame 2 is a horizontal surface, so that when the clamp 53 moves downward, the positioning frame 13 can be driven to move downward synchronously.

[0049] In some embodiments, Figure 2 As shown, an opening 132 is provided at one corner of the positioning frame 13, which allows the screw 61 to pass through the opening 132, so as to control the positioning frame 13 to be mounted on the positioning frame 2. In addition, the two vertical rods 141 in the door frame are arranged on both sides of the diagonal of the positioning frame 2, which can facilitate the movement of the carton to be folded onto the frame body 11 and the pushing of the folded carton onto the conveying mechanism 12.

[0050] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A carton folding conveying device, comprising a frame and a conveying mechanism, wherein the frame is arranged at the conveying start end of the conveying mechanism, and is characterized in that: The folding assembly also includes a positioning frame, a positioning frame, a folding assembly and a driving assembly. The positioning frame is arranged on the upper part of the frame body, the positioning frame is sleeved on the outer peripheral side of the positioning frame and can move up and down. The positioning frame is a square structure. The folding assembly has four groups and is respectively arranged at the four sides of the circumference of the positioning frame. The folding assembly includes a rotating shaft, a gear one, a gear two, a rack, a torsion spring and a strut. The rotating shaft is rotatably installed on the inner side of the positioning frame, the gear is coaxially fixedly installed on the rotating shaft, the strut is fixedly connected to the rotating shaft, the two ends of the torsion spring are respectively connected to the rotating shaft and the strut so that one end of the strut faces the inner side of the positioning frame, the gear two is rotatably installed on the positioning frame and meshes with the gear one, the rack is arranged on the inner side surface of the positioning frame, when the positioning frame moves downward, the rack can mesh with the gear two, the driving assembly one can drive the positioning frame to move downward, and when the rack is disengaged from the gear two, the strut returns to its original position under the action of the torsion spring.

2. The carton folding and conveying device according to claim 1, characterized in that: A stopper is elastically mounted on the positioning frame, and the stopper can stop against the lower part of the positioning frame. When the positioning frame moves downward, the stopper can be separated from the lower part of the positioning frame.

3. The carton folding and conveying device according to claim 2, characterized in that: The abutment point between the stopper and the positioning frame is an inclined surface.

4. The carton folding and conveying device according to claim 1, characterized in that: The driving component one has two groups, and the two groups of driving components one are respectively arranged on both sides of the positioning frame. The driving component one includes a fixed frame, a support member, a clamping member and a driving member one. The fixed frame is fixedly installed on the upper part of the frame, the support member is connected to the fixed frame for sliding up and down, the clamping member is connected to the supporting member for sliding, and a card slot adapted to the clamping member is provided on the positioning frame. The clamping member can be clamped in the card slot, and the driving member one can drive the clamping member to approach or move away from the positioning frame. After the clamping member is clamped in the card slot, the driving member one can drive the positioning frame to move downward.

5. The carton folding and conveying device according to claim 4, characterized in that: An end portion of the clamping piece facing the positioning frame is provided with an inclined surface inclined upward.

6. The carton folding and conveying device according to claim 1, characterized in that: The positioning frame includes four side plates, which are arranged opposite to each other in pairs, and the surfaces where the four side plates are located form a rectangular structure. A driving component 2 is also provided on the upper part of the frame, and the driving component 2 can drive two opposite side plates to move closer to or away from each other.

7. The carton folding and conveying device according to claim 6, characterized in that: The second driving component includes a screw, a threaded sleeve, a second connecting rod and a second driving member. The screw is vertically arranged on the inner side of the positioning frame. The threaded sleeve is threadedly fitted on the outer peripheral side of the screw. A second connecting rod is provided between the threaded sleeve and each side plate. The two ends of the second connecting rod are respectively hinged to the threaded sleeve and the side plate, so that when the threaded sleeve is raised or lowered, the two opposite side plates can be driven to move closer to or away from each other. The second driving member is fixedly installed on the upper part of the frame and can drive the screw to rotate.

8. The carton folding and conveying device according to claim 7, characterized in that: A ring sleeve is rotatably mounted on the screw rod, a telescopic rod is arranged between the ring sleeve and each side plate, the telescopic rod is arranged horizontally, and two ends of the telescopic rod are respectively fixedly connected with the ring sleeve and the side plate.

9. The carton folding and conveying device according to claim 1, characterized in that: An opening is arranged at one corner of the positioning frame.

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