Bag clamping and opening transportation equipment

Abstract

The invention relates to the field of transportation equipment, and particularly discloses bag clamping and opening transportation equipment which comprises cross beams, a bag clamping structure and a transportation assembly, the bag clamping structure is arranged on the cross beams, the transportation assembly drives the multiple cross beams to move, and the bag clamping assembly comprises an opening and closing driving element, a clamping driving element, an opening and closing connecting shaft, a clamping connecting shaft and a bag clamping assembly. The bag clamping assembly comprises a static clamping jaw, a movable clamping jaw and a retaining spring, the static clamping jaw moves in a limited mode in the axial direction of the cross beam, the movable clamping jaw slides on the static clamping jaw in a limited mode in the axial direction of the static clamping jaw, the retaining spring is arranged between the static clamping jaw and the movable clamping jaw, and the clamping connecting shaft drives the static clamping jaw and the movable clamping jaw to open or clamp. The opening and closing connecting shafts drive the adjacent bag clamping assemblies to be close to or away from each other, the opening and closing driving elements drive the clamping connecting shafts to rotate, and the clamping driving elements drive the clamping connecting shafts to rotate. According to the multi-station bag clamping and opening device, bag clamping and bag opening operation can be conducted at multiple stations at the same time, the structure is stable, the structure cost is reduced, the production efficiency is improved, and the production cost is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of transportation equipment, in particular to a bag clamping and opening transportation equipment. BACKGROUND

[0002] At present, most of the existing loading packaging production lines use cylinders or electric cylinders to complete clamping operations, and clamping elements are arranged on the planar transportation equipment to complete the assembly line work. When opening the bag, it is necessary to reach a specific position to cooperate with other opening driving elements to complete the operation. Moreover, if multiple stations are to be opened at one time, opening driving elements need to be provided for each station, which is costly. Moreover, due to the planar transportation, the occupied area is large, and the production cost is high.

[0003] The technical problem to be solved by the present application is how to design a compact bag opening and transportation equipment that can ensure production efficiency. SUMMARY

[0004] In order to overcome the shortcomings of the prior art, the purpose of the present application is to provide a bag clamping and opening transportation equipment.

[0005] The technical scheme adopted by the present application is as follows: a bag clamping and opening transportation equipment, comprising a cross beam, a bag clamping structure and a transportation assembly, the bag clamping structure is arranged on the cross beam, the transportation assembly drives a plurality of cross beams to move, the bag clamping assembly comprises an opening and closing driving element, a clamping driving element, an opening and closing connecting shaft, a clamping connecting shaft and a bag clamping assembly, the opening and closing connecting shaft and the clamping connecting shaft are respectively limited to rotate on the cross beam, the bag clamping assembly comprises a static clamping jaw, a movable clamping jaw and a retaining spring, the static clamping jaw moves axially along the cross beam, the movable clamping jaw slides axially along the static clamping jaw on the static clamping jaw, the retaining spring is arranged between the static clamping jaw and the movable clamping jaw, the circumference of the clamping connecting shaft is provided with a cam, the A' end of the movable clamping jaw abuts against the cam, the static clamping jaw is arranged between the A end of the movable clamping jaw and the clamping connecting shaft, the circumference of the opening and closing connecting shaft is provided with a plurality of positive and negative threads, adjacent static clamping jaws are matched with different direction threads of the opening and closing connecting shaft, one end of the opening and closing connecting shaft is provided with a first rotating part, the output end of the opening and closing driving element is provided with a first rotating through slot, the first rotating part and the first rotating through slot are detachably connected, one end of the clamping connecting shaft is provided with a second rotating part, the output end of the clamping driving element is provided with a second rotating through slot, the second rotating part and the second rotating through slot are detachably connected.

[0006] In some embodiments, the A' end of the movable clamping jaw is provided with a connecting roller, the connecting roller is limited to rotate at the A' end of the movable clamping jaw, and the circumference of the connecting roller abuts against the cam.

[0007] In some embodiments, the axial length of the cam is greater than the moving distance of the static clamping jaw.

[0008] In some embodiments, the cam is an axisymmetric figure.

[0009] In some embodiments, the first rotating member and the second rotating member are arranged at different ends of the cross beam, respectively.

[0010] In some embodiments, the opening and closing driving element is provided with a horizontal moving driving element and a horizontal moving fixing seat, the fixing end of the horizontal moving driving element is fixedly connected with the horizontal moving fixing seat, the output end is fixedly connected with the fixing end of the opening and closing driving element, and the horizontal moving driving element drives the opening and closing driving element to move close to or away from the cross beam.

[0011] In some embodiments, the conveying assembly comprises a conveying track, a conveying chain plate and a conveying sprocket, the conveying sprocket and the conveying chain plate are in transmission cooperation, the conveying chain plate comprises link plates and conveying connecting shafts, the link plates are movably hinged through the conveying connecting shafts, and the two ends of the conveying connecting shaft are respectively provided with conveying rollers which rotate on the conveying track.

[0012] In some embodiments, the conveying track comprises a curved portion, the middle part of the curved portion is provided with a rotating through hole, the conveying sprocket passes through the rotating through hole and protrudes from the surface of the curved portion, the circumferential surface of the conveying sprocket is provided with connecting tooth grooves and movable tooth grooves, the connecting tooth grooves and the movable tooth grooves are arranged alternately, the connecting tooth grooves limit the movement of the conveying connecting shafts, and the link plates are limited in the movable tooth grooves.

[0013] In some embodiments, one end of the link plate is a narrow part, the other end is a wide part, the narrow part of the link plate is connected with the wide part of the adjacent link plate through the conveying connecting shaft, and the width of the connecting tooth groove is smaller than the width of the narrow part.

[0014] In some embodiments, the conveying track comprises a straight portion, the lower part of the conveying track is provided with a supporting rail, and the conveying roller moves between the straight portion and the supporting rail.

[0015] The present application has the following advantages:

[0016] The bag clamping and opening conveying equipment can realize simultaneous clamping and opening operations in multiple stations, most of the clamping and opening operations of the structure involve mechanical driving, the structure is stable and can be used for a long time, the conveying assembly of the present application is rotary conveying, the structure is more compact, the same station operation can be realized, the present application saves more space, fewer driving elements are involved, the structure cost is reduced, the production efficiency is improved, and the production cost is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the embodiment;

[0018] Figure 2 It is a schematic diagram of the structure of the bag clamping and opening conveying equipment; Figure 1 It is an enlarged schematic diagram of the structure of the bag clamping and opening conveying equipment;

[0019] Figure 3 It is a schematic diagram of the connection structure of the cross beam and the bag clamping structure;

[0020] Figure 4 Structure diagram of bag clamping structure;

[0021] Figure 5 Structure diagram of opening and closing driving element;

[0022] Figure 6 Structure diagram of transportation assembly;

[0023] Figure 7 Structure diagram of Figure 6 Structure diagram of label B;

[0024] Figure 8 Structure diagram of connection structure of transportation track, transportation chain plate and transportation sprocket;

[0025] Correspondence between labels and names in the figure is as follows: 1, whole machine frame; 2, cross beam; 3, bag clamping structure; 4, transportation assembly;

[0026] 11, rail support; 21, guide shaft;

[0027] 31, opening and closing driving element; 32, clamping driving element; 33, opening and closing connecting shaft; 34, clamping connecting shaft; 35, bag clamping assembly; 36, static clamping jaw; 37, movable clamping jaw; 38, retaining spring; 311, first rotating through slot; 312, transverse movement driving element; 313, transverse movement fixing seat; 331, first rotating part; 332, first roller; 341, cam; 342, second rotating part; 343, second roller; 361, fixing protrusion; 371, connecting roller; 372, connecting protrusion;

[0028] 41, transportation driving element; 42, transportation track; 43, transportation chain plate; 44, transportation sprocket; 421, straight part; 422, curved part; 431, chain link plate; 432, transportation connecting shaft; 433, transportation roller; 441, connecting tooth groove; 442, movable tooth groove. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work belong to the scope of protection of the present application.

[0030] Please refer to Figure 1The application provides a technical scheme: a bag clamping and opening conveying device, comprising a whole machine frame 1, a cross beam 2, a bag clamping structure 3 and a conveying assembly 4. The conveying assembly 4 moves on the whole machine frame 1, the bag clamping structure 3 is arranged on the cross beam 2, and the conveying assembly 4 drives the movement of the cross beams 2.

[0031] Please refer to Figure 6 The conveying assembly 4 comprises a conveying driving element 41, a conveying track 42, a conveying chain plate 43 and a conveying sprocket 44. The conveying driving element 41 is a combination of a motor and a speed reducer, the conveying driving element 41 is arranged on the whole machine frame 1, and the conveying driving element 41 drives the rotation of the conveying chain plate 43 through the conveying sprocket 44. The conveying sprocket 44 and the conveying chain plate 43 are in transmission cooperation. The cross beam 2 is fixedly arranged on the conveying chain plate 43.

[0032] Please refer to Figure 3 and Figure 4 The bag clamping assembly 35 comprises an opening and closing driving element 31, a clamping driving element 32, an opening and closing connecting shaft 33, a clamping connecting shaft 34 and the bag clamping assembly 35. The opening and closing driving element 31 and the clamping driving element 32 are arranged on the whole machine frame 1, and the opening and closing driving element 31 and the clamping driving element 32 are respectively motors in rotational motion. The opening and closing connecting shaft 33 and the clamping connecting shaft 34 are respectively limited to rotate on the cross beam 2. The bag clamping assembly 35 moves along the cross beam 2 in the axial direction of the cross beam 2. The bag clamping assembly 35 comprises a static clamping jaw 36, a movable clamping jaw 37 and a retaining spring 38. The static clamping jaw 36 moves along the cross beam 2 in the axial direction and can be arranged on the guide rail or guide column on the cross beam 2. The movable clamping jaw 37 slides along the static clamping jaw 36 in the axial direction of the static clamping jaw 36. The retaining spring 38 is arranged between the static clamping jaw 36 and the movable clamping jaw 37, and the retaining spring 38 keeps the A end of the movable clamping jaw 37 always pressed against the A end of the static clamping jaw 36. The circumferential surface of the clamping connecting shaft 34 is provided with a cam 341, and the A' end of the movable clamping jaw 37 abuts against the cam 341. In order to keep the movable clamping jaw 37 always abutting against the cam 341, the static clamping jaw 36 is arranged between the A end of the movable clamping jaw 37 and the clamping connecting shaft 34, and the retaining spring 38 not only keeps the A end of the movable clamping jaw 37 always pressed against the A end of the static clamping jaw 36, but also keeps the A' end of the movable clamping jaw 37 always pressed against the clamping connecting shaft 34. When the clamping connecting shaft 34 rotates, the distance between the A end of the movable clamping jaw 37 and the A end of the static clamping jaw 36 changes, thereby realizing the clamping or loosening function between the two clamping jaws.

[0033] The circumferential surface of the opening and closing connecting shaft 33 is provided with a plurality of positive and reverse threads, which are arranged in sequence. The static clamping jaw 36 is threadedly connected with the opening and closing connecting shaft 33. The two bag clamping assemblies 35 are arranged in a group. The static clamping jaws 36 in the two bag clamping assemblies 35 are respectively threadedly connected with the threads in different directions on the opening and closing connecting shaft 33. When the opening and closing connecting shaft 33 rotates, the two bag clamping assemblies 35 in the same group move axially towards each other along the cross beam 2, so that the surface of the packaging bag is convex outward, and the opening operation is completed. The two bag clamping assemblies 35 in the same group move axially away from each other along the cross beam 2, so that the surface of the packaging bag forms a plane, and the closing operation is completed.

[0034] In order to increase the smoothness between the A' end of the movable clamping jaw 37 and the cam 341, preferably, the A' end of the movable clamping jaw 37 is provided with a connecting roller 371, which rotates at the A' end of the movable clamping jaw 37. The circumferential surface of the connecting roller 371 abuts against the cam 341.

[0035] In order to ensure that the A' end of the movable clamping jaw 37 does not deviate from the cam 341, the axial length of the cam 341 is greater than the moving distance of the static clamping jaw 36.

[0036] In order to reduce the moving friction of the movable clamping jaw 37 on the static clamping jaw 36, the movable clamping jaw 37 is provided with a limiting roller, and the static clamping jaw 36 is provided with a limiting groove. The limiting roller moves in the limiting groove.

[0037] The static clamping jaw 36 is provided with a fixed protrusion 361, and the movable spring is provided with a connecting protrusion 372. The fixed protrusion 361 and the connecting protrusion 372 are arranged on the same axis, and the retaining spring 38 is arranged between the fixed protrusion 361 and the connecting protrusion 372.

[0038] Please refer to Figure 3 and Figure 5The open-close connecting shaft 33 passes through the crossbeam 2 and is fixed with a first rotating part 331 at one end. The fixed end of the open-close driving element 31 is arranged on the whole machine frame 1, and the output end is provided with a first rotating through slot 311. The first rotating part 331 and the first rotating through slot 311 are detachably connected. When the first rotating part 331 enters the first rotating through slot 311, the open-close driving element 31 can drive the open-close connecting shaft 33 to rotate. Since the two ends of the first rotating through slot 311 are respectively connected with the outside, the first rotating part 331 can enter or leave the first rotating through slot 311 from either end of the first rotating through slot 311. Since the crossbeam 2 is provided with a plurality of crossbeams 2, when the open-close connecting shaft 33 on each crossbeam 2 reaches the open-close driving element 31, the first rotating part 331 and the first rotating through slot 311 are connected, and the open-close driving element 31 drives the open-close connecting shaft 33 to rotate. Therefore, the output end of the open-close driving element 31 is open, and any open-close connecting shaft 33 on the crossbeam 2 can be rotated. When the output end of the open-close driving element 31 works, it can drive all the movable clamping jaws 37 and the static clamping jaws 36 on the same crossbeam 2 to open or close the bag.

[0039] In order to enable the first rotating part 331 to smoothly enter the first rotating through slot 311, the two ends of the first rotating part 331 are respectively provided with first rollers 332. The first rollers 332 are limited to rotate on the first rotating part 331, and can assist the first rotating part 331 to enter the first rotating through slot 311.

[0040] Please refer to Figure 2 and Figure 3 The clamping connecting shaft 34 passes through the crossbeam 2 and is fixed with a second rotating part 342 at one end. The fixed end of the clamping driving element 32 is arranged on the whole machine frame 1, and the output end is provided with a second rotating through slot. The second rotating part 342 and the second rotating through slot are detachably connected. When the second rotating part 342 enters the second rotating through slot, the clamping driving element 32 can drive the clamping connecting shaft 34 to rotate. Since the two ends of the second rotating through slot are respectively connected with the outside, the second rotating part 342 can enter or leave the second rotating through slot from either end of the second rotating through slot. Since the crossbeam 2 is provided with a plurality of crossbeams 2, when the clamping connecting shaft 34 on each crossbeam 2 reaches the clamping driving element 32, the second rotating part 342 and the second rotating through slot are connected, and the clamping driving element 32 drives the clamping connecting shaft 34 to rotate. Therefore, the output end of the clamping driving element 32 is open, and any clamping connecting shaft 34 on the crossbeam 2 can be rotated. When the output end of the clamping driving element 32 works, it can drive all the bag clamping assemblies 35 on the same crossbeam 2 to clamp or loosen the operation.

[0041] In order to clamp the driving element 32 work, only need to rotate in the same direction to drive the movable jaw 37 and static jaw 36 complete loose and clamping operation, cam 341 is axisymmetric figure, cam 341 rotates a circle, movable jaw 37 abuts cam 341 moves to complete the clamping and loose operation.

[0042] In order to the second rotating member 342 can smoothly into the second rotating slot, the two ends of the second rotating member 342 are respectively provided with the second roller 343, the second roller 343 is limited rotation on the second rotating member 342, the second roller 343 can assist the second rotating member 342 into the second rotating slot.

[0043] Please refer to Figure 5 In order to realize another kind of first rotating slot 311 and the first rotating member 331 between the separation mode, open and close driving element 31 is provided with horizontal moving driving element 312 and horizontal moving fixed seat 313, horizontal moving fixed seat 313 is fixedly connected with the whole machine frame 1, horizontal moving driving element 312 is output end linear motion cylinder or electric cylinder, the fixed end of horizontal moving driving element 312 is fixedly connected with horizontal moving fixed seat 313, the output end is fixedly connected with the fixed end of open and close driving element 31, horizontal moving driving element 312 drives open and close driving element 31 to move in horizontal moving fixed seat 313, the moving path of open and close driving element 31 is close to or away from the crossbeam 2.

[0044] In order to avoid the motion interference of clamping driving element 32 and open and close driving element 31 when working, the first rotating member 331 and the second rotating member 342 are arranged at different ends of the crossbeam 2 respectively.

[0045] Clamping driving element 32 and open and close driving element 31 are provided with several according to actual requirements.

[0046] The crossbeam 2 is provided with guide shaft 21, the guide shaft 21 passes through the static jaw 36, the guide shaft 21 is coaxial with the crossbeam 2, the guide shaft 21 is coaxial with the crossbeam 2, the static jaw 36 moves along the guide shaft 21.

[0047] In order to avoid the adjacent but different groups of bag clamping assembly 35 touch, the adjacent groups of bag clamping assembly 35 are provided with baffle, the baffle is fixedly connected with the crossbeam 2, the open and close connecting shaft 33, the clamping connecting shaft 34 and the guide shaft 21 pass through the crossbeam 2.

[0048] Please refer to Figures 6-8In order to increase the carrying capacity of the transport chain plate 43 of the transport assembly 4, the transport chain plate 43 comprises link plates 431 and transport connecting shafts 432. The link plates 431 are hingedly connected through the transport connecting shafts 432. In order to avoid the connection position between adjacent link plates 431 being too wide, one end of the link plate 431 is narrow and the other end is wide, and the narrow end of the link plate 431 is connected with the wide end of the adjacent link plate 431 through the transport connecting shaft 432. In order to reduce the friction force of the link plate 431 moving on the transport track 42, the two ends of the transport connecting shaft 432 are respectively provided with transport rollers 433, and the transport rollers 433 rotate on the transport track 42.

[0049] The transport track 42 comprises a straight portion 421 and a curved portion 422, and the middle part of the curved portion 422 is provided with a rotating through hole, and the transport sprocket 44 passes through the rotating through hole and protrudes from the surface of the curved portion 422. The transport sprocket 44 passes through the rotating through hole and is in transmission cooperation with the bottom of the link plate 431.

[0050] The circumferential surface of the transport sprocket 44 is provided with connecting tooth grooves 441 and movable tooth grooves 442, and the connecting tooth grooves 441 and the movable tooth grooves 442 are staggered. The connecting tooth grooves 441 limit the movement of the transport connecting shaft 432, and since the transport connecting shaft 432 is limited in the connecting tooth groove 441, the link plate 431 is limited in the movable tooth groove 442. The width of the connecting tooth groove 441 is smaller than the width of the narrow part, so when the link plate 431 passes through the curved portion 422, the transport connecting shaft 432 is clamped in the connecting tooth groove 441, and the transport roller 433 rotates on the curved portion 422 to reduce the pressure of the cross beam 2 on the transport sprocket 44.

[0051] When the link plate 431 moves below the transport track 42, in order to avoid the falling of the link plate 431, the lower part of the transport track 42 is provided with a supporting rail 11, and the transport roller moves between the straight portion 421 and the supporting rail 11, so that the link plate 431 moves between the straight portion 421 and the supporting rail 11.

[0052] The cross beam 2 is fixedly arranged on the link plate 431.

[0053] Compared with the prior art, one cross beam 2 needs to be fixed on several links to have sufficient carrying capacity. The link plate 431 in the embodiment is designed as an integral structure, and most of the load on the link plate 431 is transferred to the transport track 42, thereby improving the carrying capacity of the transport chain plate 43 and enabling the link plate 431 to bear stronger tension than a conventional chain. Moreover, the link plate 431 can also realize a pitch of more than 150 mm.

[0054] The working principle and use flow of the present application: the transport assembly 4 drives the cross beam 2 to make a circulating rotary motion, reaches the first set position, the clamping driving element 32 works, the movable clamping jaw 37 and the static clamping jaw 36 complete the clamping of the packaging bag, reaches the second set position, the opening and closing driving element 31 works forward, the two bag clamping assemblies 35 of the same group are close to each other, and the bag opening operation of the packaging bag is completed, the opening and closing driving element 31 works reversely, and the bag closing operation of the packaging bag is completed.

[0055] Finally, it should be noted that: the above only for the preferred examples of the present application, and not for limiting the present application, although the foregoing detailed description of the present application is made with reference to the foregoing examples, for those skilled in the art, it still can be modified to the technical solution recorded in the foregoing embodiments, or equivalent replacement of part of the technical features. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A bag clamping and opening conveying device, characterized in that, The system includes a crossbeam (2), a bag clamping structure (3), and a transport assembly (4). The bag clamping structure (3) is mounted on the crossbeam (2). The transport assembly (4) drives several crossbeams (2) to move. The bag clamping assembly (35) includes an opening / closing drive element (31), a clamping drive element (32), an opening / closing connecting shaft (33), a clamping connecting shaft (34), and a bag clamping assembly (35). The opening / closing connecting shaft (33) and the clamping connecting shaft (34) rotate at their respective upper limits on the crossbeam (2). The bag clamping assembly (35) includes a stationary gripper (36), a movable gripper (37), and a retaining spring (38). The stationary gripper (36) moves at its axial limit along the crossbeam (2). The movable gripper (37) slides at its axial limit on the stationary gripper (36). The retaining spring (38) is located between the stationary gripper (36) and the movable gripper (37). The clamping connecting shaft (38) rotates at its respective upper limit on the crossbeam (2). The circumferential surface of the 34) is provided with a cam (341), the A' end of the movable jaw (37) abuts against the cam (341), the stationary jaw (36) is disposed between the A end of the movable jaw (37) and the clamping connecting shaft (34), the circumferential surface of the opening and closing connecting shaft (33) is provided with several sections of positive and negative threads, the adjacent stationary jaws (36) are threaded in different directions with the opening and closing connecting shaft (33), one end of the opening and closing connecting shaft (33) is provided with a first rotating member (331), the output end of the opening and closing driving element (31) is provided with a first rotating through groove (311), the first rotating member (331) and the first rotating through groove (311) are detachably connected, one end of the clamping connecting shaft (34) is provided with a second rotating member (342), the output end of the clamping driving element (32) is provided with a second rotating through groove, the second rotating member (342) and the second rotating through groove are detachably connected.

2. The bag clamping and opening conveying device according to claim 1, characterized in that, The movable gripper (37) has a connecting roller (371) at its A' end. The connecting roller (371) rotates in a limited manner at the A' end of the movable gripper (37), and the circumferential surface of the connecting roller (371) abuts against the cam (341).

3. The bag clamping and opening conveying device according to claim 1, characterized in that, The axial length of the cam (341) is greater than the moving distance of the stationary gripper (36).

4. The bag clamping and opening conveying device according to claim 1, characterized in that, The cam (341) is an axisymmetric figure.

5. The bag clamping and opening conveying device according to claim 1, characterized in that, The first rotating component (331) and the second rotating component (342) are respectively disposed at different ends of the crossbeam (2).

6. The bag clamping and opening conveying device according to claim 1, characterized in that, The opening and closing drive element (31) is provided with a transverse drive element (312) and a transverse fixed seat (313). The fixed end of the transverse drive element (312) is fixedly connected to the transverse fixed seat (313), and the output end is fixedly connected to the fixed end of the opening and closing drive element (31). The transverse drive element (312) drives the opening and closing drive element (31) to move closer to or away from the crossbeam (2).

7. The bag clamping and opening conveying device according to claim 1, characterized in that, The transport component (4) includes a transport track (42), a transport chain plate (43), and a transport sprocket (44). The transport sprocket (44) and the transport chain plate (43) are driven together. The transport chain plate (43) includes a chain link plate (431) and a transport connecting shaft (432). The chain link plates (431) are movably hinged to each other through the transport connecting shaft (432). The two ends of the transport connecting shaft (432) are respectively provided with transport rollers (433). The transport rollers (433) rotate on the transport track (42).

8. The bag clamping and opening conveying device according to claim 7, characterized in that, The transport track (42) includes a curved section (422), the middle part of which is provided with a rotating through hole. The transport sprocket (44) passes through the rotating through hole and protrudes from the surface of the curved section (422). The circumferential surface of the transport sprocket (44) is provided with a connecting tooth groove (441) and a movable tooth groove (442). The connecting tooth groove (441) and the movable tooth groove (442) are staggered. The connecting tooth groove (441) restricts the movement of the transport connecting shaft (432). The chain link plate (431) is restricted within the movable tooth groove (442).

9. The bag clamping and opening conveying device according to claim 8, characterized in that, The link plate (431) has a narrow part at one end and a wide part at the other end. The narrow part of the link plate (431) is connected to the wide part of the adjacent link plate (431) by a transport connecting shaft (432). The width of the connecting tooth groove (441) is smaller than the width of the narrow part.

10. The bag clamping and opening conveying device according to claim 7, characterized in that, The transport track (42) includes a straight section (421), and a support rail (11) is provided below the transport track (42). The transport roller moves between the straight section (421) and the support rail (11).

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