Formed paper bag conveying device

Abstract

The present invention discloses a forming paper bag conveying device. It includes a paper conveying wheel device, a main positioning device for paper bag stacking, and a front positioning device for paper bags. A paper suction nozzle device for adsorbing the formed paper bags above the paper conveying wheel device is further arranged on the frame wallboard. Through the paper suction nozzle device, the formed paper bags can be adsorbed one by one and conveyed onto the paper conveying wheel device, and then the paper conveying wheel device sequentially conveys the formed paper bags onto the chain positioning conveying device. The advantages are as follows: It ensures the accurate conveying of the formed paper bags, avoids the situation of conveying multiple paper bags at one time during the conveying process, and thus eliminates the problem of paper bags being missed in processing. The action reliability of the finger claw assembly is high and forms a rotational conveying, ensuring the consistency of the transfer process and improving the transfer efficiency. The roller bearing can be used to keep in contact with the driving cam to specify the running track of the swing gear, improve the accuracy of the action, and further ensure the reliability of the conveying.

Description

Technical Field

[0001] The present invention relates to an accessory device of a paper bag forming machine, in particular to a conveying device for formed paper bags. Background Art

[0002] In the prior art, large-scale automated production of paper bags has been achieved, and the structures of paper bags in the market vary greatly. For example, in the takeaway market, round ropes or flat rope handles need to be pasted on the outside of the paper bags. At the same time, in order to ensure the reliability of the use of the paper bags, usually a piece of paper is pasted on the bottom surface of the bag bottom as a bottom patch to increase the strength of the bag bottom. However, in the process of paper bag processing, a paper bag conveying device is required to sequentially convey the paper bags to the next process for subsequent processing (such as pasting handles and bottom patches on the outside). Traditionally, manual methods are usually used to transfer the paper bags between different processes. Later, automated conveying equipment has gradually emerged. Although the existing automated processing equipment can achieve the automated conveying of paper bags, due to the defects in its structural design, it is difficult to ensure reliable conveying. Usually, there may be a situation where multiple paper bags are conveyed at one time during the conveying process, resulting in the problem of partial paper bags being missed in processing. Subsequently, it is necessary to sort the paper bags that have not been accurately conveyed, which is time-consuming and laborious, resulting in a waste of production costs. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a conveying device for formed paper bags that can accurately input the stacked formed paper bags one by one for the next process production, thereby improving work efficiency and reducing production costs.

[0004] To solve the above technical problem, the conveying device for formed paper bags of the present invention includes a paper conveying wheel device for conveying formed paper bags supported and installed by a frame wall panel, a main paper bag stacking positioning device located above the paper conveying wheel device for positioning the bottom surface and two side surfaces of the formed paper bags, and a front paper bag positioning device located in front of the main paper bag stacking positioning device for supporting the front end surface of the formed paper bags. A paper suction nozzle device for adsorbing the formed paper bags above the paper conveying wheel device is also provided on the frame wall panel. Through the paper suction nozzle device, the formed paper bags can be adsorbed one by one and conveyed onto the paper conveying wheel device, and then the paper conveying wheel device sequentially conveys the formed paper bags onto the paper bag output device.

[0005] The paper conveying wheel device includes a main shaft supported and installed by a frame wall panel, a paper conveying wheel assembly installed on the main shaft, a driving cam, and a main gear capable of driving the main shaft to rotate. The paper conveying wheel assembly is provided with a finger claw assembly for clamping and conveying the formed paper bags, and a driving swing piece for driving the finger claw assembly in cooperation with the driving cam is also provided on the paper conveying wheel assembly. Through the driving of the driving swing piece, the finger claw assembly can bite and grab the formed paper bags or release and convey them onto the paper bag output device.

[0006] The paper feeding wheel assembly includes a pair of fixed paper feeding wheels mounted on the main shaft and a pair of synchronous paper feeding wheels mounted between the pair of fixed paper feeding wheels. Card slots are provided on both of the two synchronous paper feeding wheels. The finger claw assembly includes a finger claw shaft installed through the pair of fixed paper feeding wheels and capable of swinging driven by a driving pendulum, and two finger claws mounted on the finger claw shaft. The two finger claws are located at the card slots of the two synchronous paper feeding wheels so as to be able to bite and grab or release and convey the formed paper bag.

[0007] The driving pendulum includes a swing gear installed on one of the fixed paper feeding wheels through a pin shaft and capable of swinging around the pin shaft as the center, a roller bearing also installed on the fixed paper feeding wheel through a mounting shaft, a first spring rod installed on the swing gear, and a second spring rod installed on the fixed paper feeding wheel. A spring capable of keeping the roller bearing in contact with the driving cam is connected between the first spring rod and the second spring rod. A finger claw shaft gear matched with the swing gear is installed on the finger claw shaft.

[0008] The paper sucking nozzle device includes a support assembly located below the formed paper bag, installed on the frame wallboard through a rotating shaft and capable of swinging relative to the formed paper bag, a swing arm assembly cooperatively installed with the support assembly, and a suction nozzle tube with a suction nozzle installed on the support assembly. A gas distribution sleeve cam is installed on the main shaft. The suction nozzle tube is connected to the gas distribution sleeve cam through an air pipe.

[0009] The swing arm assembly includes a support installed at one end of the support assembly, a connecting plate hinged to the support, and a swing arm hinged to the connecting plate. The swing arm is hinged to the frame wallboard. An air suction nozzle cam is installed on the main shaft. A roller bearing matched with the air suction nozzle cam is installed on the swing arm. A spring for pressing the roller bearing against the air suction nozzle cam is also pulled between the frame wallboard and the swing arm. By the rotation of the air suction nozzle cam, the swing arm assembly can drive the support assembly to swing relative to the formed paper bag, so that the suction nozzle contacts the formed paper bag to adsorb and convey the formed paper bag.

[0010] The main positioning device for paper bag stacking includes a sliding shaft supported and installed by the frame wallboard and an adjusting assembly arranged in parallel with the sliding shaft. A pair of sliding seats are installed on the sliding shaft. A tray assembly for supporting the formed paper bag is installed on the pair of sliding seats. Internal threaded holes for cooperating with the adjusting assembly are provided on both of the two sliding seats. The adjusting assembly has two threaded sections respectively cooperating with the two threaded holes. The adjusting assembly is screwed into the threaded holes of the sliding seats through the threaded sections and can adjust the position of the sliding seats on the sliding shaft through the adjusting assembly.

[0011] The adjusting assembly includes a first adjusting screw, a second adjusting screw, and a handwheel mounted on the first adjusting screw or the second adjusting screw. A threaded section is respectively provided on the first adjusting screw and the second adjusting screw, and the threaded sections of the first adjusting screw and the second adjusting screw are arranged in opposite directions so that the two sliding seats can move relatively or in opposite directions to adjust the width of the paper bag surface.

[0012] The front positioning device of the paper bag includes a mounting shaft supported and installed by the frame wall panel, a fixed seat fixedly installed on the mounting shaft, a positioning plate installed on the fixed seat, and a bottom support plate installed on the positioning plate. The front end of the formed paper bag is limited on the positioning plate and supported by the bottom support plate.

[0013] Two finger claw assemblies are symmetrically arranged on the paper feeding wheel assembly. Two driving pendants are also provided on the paper feeding wheel assembly. Each of the two driving pendants corresponds to a finger claw assembly so that both finger claw assemblies can bite and grab the formed paper bag or release it and convey it to the paper bag output device.

[0014] The advantages of the present invention are as follows:

[0015] (1) By setting the paper suction nozzle device, the formed paper bags are adsorbed one by one and conveyed to the paper feeding wheel device, and the paper feeding wheel device is used to transfer the formed paper bags. The adsorption method is adopted for transfer, so that only a single formed paper bag can be adsorbed each time, ensuring the accurate conveyance of the formed paper bags, avoiding the situation of conveying multiple paper bags at one time during the conveying process, and thus eliminating the problem of paper bag omission in processing.

[0016] (2) Through the ingenious structural design of the paper feeding wheel device and the driving pendants with special structures cooperating with the finger claw assemblies of the paper feeding wheel device, the finger claw assemblies can bite and grab or release the formed paper bags by driving the driving pendants. The action reliability of the finger claw assemblies is high and a rotational conveyance is formed, ensuring the consistency of the transfer process and improving the transfer efficiency.

[0017] (3) The swing gear ingeniously designed in the driving pendant and the roller bearing cooperating with the driving cam. Thus, the roller bearing can be used to keep in contact with the driving cam, making the running track of the swing gear specific, improving the accuracy of the action, and further ensuring the reliability of the conveyance.

[0018] (4) Due to the special structural design of the paper suction nozzle device, during use, the rotation of the designed suction nozzle cam can make the swing arm assembly drive the support assembly to swing relative to the formed paper bag, so that the suction nozzle contacts the formed paper bag to adsorb and convey the formed paper bag. This structural design can effectively prevent the problems of mis-adsorption and mis-transfer, and improve the accuracy of the adsorption action.

[0019] (5)In the structural design of the main positioning device for paper bag stacking, in addition to being able to effectively support the formed paper bags, it can also make the two sliding seats move relative to or in the opposite direction through its ingeniously designed adjustment components, enabling the adjustment of the paper bag surface width size, improving the adaptability of the product. At the same time, the structural design of the front positioning device for paper bags can enable the formed paper bags to smoothly detach from the front positioning device for paper bags during the adsorption process, improving the reliability of the output of the formed paper bags.

[0020] (6)Two finger claw components are symmetrically arranged on the paper feeding wheel assembly, so that when the paper feeding wheel rotates one circle, the purpose of conveying two paper bags can be achieved, further improving the working efficiency and significantly reducing the production cost. Brief Description of the Drawings

[0021] Figure 1 is a three-dimensional structural schematic diagram of the formed paper bag conveying device of the present invention;

[0022] Figure 2 is a three-dimensional structural schematic diagram of the paper feeding wheel device in the present invention;

[0023] Figure 3 is a sectional structural schematic diagram of the paper feeding wheel device in the present invention;

[0024] Figure 4 is a structural schematic diagram of the side positioning device for paper bag stacking in the present invention;

[0025] Figure 5 is a sectional structural schematic diagram of the side positioning device for paper bag stacking in the present invention;

[0026] Figure 6 is a three-dimensional structural schematic diagram of the front positioning device for paper bags in the present invention;

[0027] Figure 7 is a three-dimensional structural schematic diagram of the paper suction nozzle device in the paper bag output device of the present invention. Detailed Description of the Embodiment

[0028] The formed paper bag conveying device of the present invention will be further described in detail below in conjunction with the drawings and specific embodiments.

[0029] Embodiment 1:

[0030] As shown in the figure, the formed paper bag conveying device of this embodiment includes a paper conveying wheel device 200 installed between two left and right frame wallboards 102 for conveying the formed paper bag 101, a main paper bag stacking and positioning device 300 located above the paper conveying wheel device 200 for positioning the bottom surface and two side surfaces of the formed paper bag 101, and a front paper bag positioning device 400 located in front of the main paper bag stacking and positioning device 300 (the output direction of the formed paper bag is defined as the front) for supporting the front end surface of the formed paper bag 101. A paper suction nozzle device 500 for adsorbing the formed paper bag 101 above the paper conveying wheel device 200 is also provided between the two left and right frame wallboards 102. Through the paper suction nozzle device 500, the formed paper bags 101 can be adsorbed one by one and conveyed onto the paper conveying wheel device 200, and then the paper conveying wheel device 200 sequentially conveys the formed paper bags 101 onto the paper bag output device 600.

[0031] Among them, the said paper conveying wheel device 200 includes a main shaft 201 supported and installed between two left and right frame wallboards 102 through bearing seats 202 and bearings, a paper conveying wheel assembly installed on the main shaft 201, an air distribution sleeve cam 206, an air suction nozzle cam 217, and a main gear 203 capable of driving the main shaft to rotate. A cam fixing seat 204 is also installed on the bearing seat 202, and a driving cam 205 is installed on the cam fixing seat 204. The said paper conveying wheel assembly includes a pair of fixed paper conveying wheels 207 respectively installed on the main shaft 201 through flat keys and a pair of synchronous paper conveying wheels 208 located between this pair of fixed paper conveying wheels 207. The paper conveying wheel assembly is provided with a finger claw assembly for clamping and conveying the formed paper bag, and a driving swing piece for driving the finger claw assembly is also provided on the paper conveying wheel assembly and is matched with the driving cam 205. Through the driving of the driving swing piece, the finger claw assembly can bite and grab the formed paper bag or release and convey it to the paper bag output device 600; for the finger claw assembly, it includes a finger claw shaft 210 supported and installed by this pair of fixed paper conveying wheels 207 and capable of being driven by the driving swing piece to swing, and two finger claws 211 installed on the finger claw shaft 210. In this embodiment, the finger claw shaft 210 is installed on the two fixed paper conveying wheels 207 with sliding bearings. Card slots are provided on both of the two synchronous paper conveying wheels 208, and the two finger claws 211 are respectively located at the card slots of the two synchronous paper conveying wheels 208 so as to be able to bite and grab the formed paper bag or release and convey it.

[0032] For the driving swing piece, it includes being installed on the right side through a pin shaft 218 ( Figure 3(in the orientation shown) a swing gear 209 that can swing around a pin shaft on a fixed paper feeding wheel 207, a roller bearing 229 also installed on the fixed paper feeding wheel 207 through a mounting shaft 213, a first spring rod 214 installed on the swing gear 209, and a second spring rod 215 installed on the fixed paper feeding wheel 207 on the right side. A spring that can keep the roller bearing 229 in contact with the driving cam 205 is connected between the first spring rod 214 and the second spring rod 215. A finger shaft gear 212 that cooperates with the swing gear 209 is installed on the finger shaft 210. Among them, the driving cam 205 is fixed. The roller bearing 229 rotates with the main shaft. Under the action of the driving cam 205, the swing gear 209 swings around the pin shaft 218, driving the finger shaft gear 212 to rotate, that is, driving the finger shaft 210 and the finger 211 to swing. When the finger 211 swings, the to-be-formed paper bag 101 is loosened, that is, the formed paper bag falls from the synchronous paper feeding wheel 208 and enters the paper bag output device 600. On the contrary, when the finger 211 bites tightly with the synchronous paper feeding wheel 208, the to-be-formed paper bag 101 is conveyed from the suction nozzle device 500 to the paper feeding wheel device.

[0033] Further, the said paper suction nozzle device 500 includes a support assembly located below the formed paper bag and installed on the frame wall panel 102 through a rotating shaft and capable of swinging relative to the formed paper bag, a swing arm assembly cooperatively installed with the support assembly, and a suction nozzle pipe 504 with a suction nozzle 505 installed on the support assembly. A gas distribution sleeve cam 206 is installed on the main shaft 201. The suction nozzle pipe 504 is connected to the gas distribution sleeve cam 206 through an air pipe. Among them, the support assembly includes a support plate 503, connecting plates 514 installed at the left and right ends of the support plate 503 through screws, a long shaft 502 fixedly installed on the left connecting plate, a short shaft 501 fixedly installed on the right connecting plate, and two copper sleeves 513 respectively installed on the long shaft 502 and the short shaft 501. Thus, the support assembly can be installed between the two frame wall panels 102 through the copper sleeves 513. Through the copper sleeves 513, the long shaft 502 and the short shaft 501 can swing. Figure 7It can be seen that the nozzle tube 504 is fixedly installed on the support plate 503. One end of the nozzle tube 504 is installed with a rubber nozzle 505, and the other end is installed with an air pipe, which is connected to the air distribution sleeve cam 206, and the air suction and release of the nozzle are controlled by the air distribution sleeve cam 206. In addition, the swing arm assembly includes a support 506 installed on the long shaft 502, a connecting plate 508 hinged to the support 506 through a connecting shaft 507, and a swing arm 509 also hinged to the connecting plate 508 through a connecting shaft. The support 506 is located outside the frame wall panel 102. The swing arm 509 is hinged to the frame wall panel 102 through a support shaft 510 and swings around the support shaft 510 as the center. An air suction nozzle cam 217 is installed on the main shaft 201, and a roller bearing 511 cooperating with the air suction nozzle cam 217 is installed on the swing arm 509. At the same time, spring pull studs are provided on both the swing arm 509 and the frame wall panel 102. A tension spring installed through the spring pull studs is also pulled between the frame wall panel 102 and the swing arm 509. The roller bearing 511 is pressed against the air suction nozzle cam 217 through the tension spring. The rotation of the air suction nozzle cam 217 causes the swing arm 509 to swing, and drives the fixed plate 503 to swing through the connecting plate 508 and the support 506, that is, the nozzle 505 swings upward to collide with the formed paper bag 101 and starts to suck air, pulls the formed paper bag 101 downward, and sends it to the synchronous paper feeding wheel 208. The finger claws 211 bite the formed paper bag and send it to the paper bag output device 600. Multiple groups of nozzles can be designed according to the size of the paper bag.

[0034] Furthermore, the main positioning device 300 for paper bag stacking includes a sliding shaft 301 supported and installed by two left and right frame wallboards 102 and an adjusting component arranged in parallel with the sliding shaft 301. The adjusting component includes a first adjusting screw 307, a second adjusting screw 309, and a handwheel 312 installed on the second adjusting screw 309. Both the first adjusting screw 307 and the second adjusting screw 309 are installed between the two left and right frame wallboards 102 through support sleeves 313. A pair of sliding seats 302 are installed on the sliding shaft 301. A tray component for supporting the formed paper bags is installed on this pair of sliding seats 302. Inner threaded holes (which can be nuts embedded in the sliding seats 302) for cooperating with the adjusting component are provided on both sliding seats 302. A threaded section is respectively provided on the first adjusting screw 307 and the second adjusting screw 309. The threaded sections of the first adjusting screw 307 and the second adjusting screw 309 are arranged in opposite directions so that the two sliding seats 302 can move relatively or in opposite directions to adjust the width of the paper bag surface. In addition, the tray component includes two angle iron trays 303 respectively installed on the two sliding seats 302 by screws and a pair of side baffles 304 respectively installed on the two angle iron trays 303 by screws. It may also include a middle tray seat 305 fixedly installed on the sliding shaft 301 by screws and a middle tray 306 installed on the middle tray seat 305 by screws. In this embodiment, a right-hand thread nut 310 is provided on the left sliding seat 302, and a left-hand thread nut 311 is provided on the right sliding seat 302. The first adjusting screw 307 is screwed into the threaded hole of the right-hand thread nut 310, and the second adjusting screw 309 is screwed into the threaded hole of the left-hand thread nut 311. The first adjusting screw 307 and the second adjusting screw 309 are connected by a connecting sleeve 308. Thus, by rotating the handwheel 312, the two sliding seats 302 are moved by using the first adjusting screw 307 and the second adjusting screw 309, that is, the distance between the two side baffles 304. The formed paper bags 101 are stacked on the trays 303 and 306, and the sides are positioned by this pair of side baffles 304. The front of the formed paper bags 101 is positioned by the paper bag front positioning device 400. In addition, the paper bag front positioning device 400 includes a mounting shaft 401 supported and installed by the frame wallboard 102, two fixed seats 402 fixedly installed on the mounting shaft, two positioning plates 403 respectively installed on the two fixed seats by screws, and bottom trays 404 respectively installed on each positioning plate. The front end of the formed paper bag is limited on the positioning plate and supported by the bottom tray. Thus, the main positioning device 300 for paper bag stacking and the paper bag front positioning device 400 are installed above the paper feeding wheel device 200 and form an inclined plane, as shown in Figure 1 shown, so that the front end of the formed paper bag 101 is tightly attached to the fixing plate 403 to achieve the paper bag positioning effect.

[0035] Embodiment Two:

[0036] The bag feeding device for the formed paper bags in this embodiment is substantially the same as that in Embodiment 1. The difference lies in that two finger claw assemblies are symmetrically arranged on the paper feeding wheel assembly, and two driving pendants are also arranged on the paper feeding wheel assembly. Each of the two driving pendants corresponds to one finger claw assembly, enabling both finger claw assemblies to tightly grip and grab the formed paper bags or release and convey them to the paper bag output device 600. That is to say, two equally divided finger claw assemblies and driving pendants are respectively installed on the fixed paper feeding wheel 207. Namely, when the paper feeding wheel rotates one circle, two formed paper bags are conveyed, thereby improving the conveying efficiency. The air distribution sleeve cam 206 mainly controls the suction and air release of the suction nozzle device 500.

Claims

1. A forming paper bag bag conveying device, characterized in that: It includes a paper feeding wheel device (200) for conveying formed paper bags (101) supported and installed by a machine frame wall panel (102), a main paper bag stacking and positioning device (300) located above the paper feeding wheel device (200) for positioning the bottom surface and both side surfaces of the formed paper bags (101), and a front paper bag positioning device (400) located in front of the main paper bag stacking and positioning device (300) for supporting the front end surface of the formed paper bags (101). A paper suction nozzle device (500) for adsorbing the formed paper bags (101) above the paper feeding wheel device (200) is further provided on the machine frame wall panel (102). Through the paper suction nozzle device (500), the formed paper bags (101) can be adsorbed one by one and conveyed onto the paper feeding wheel device (200), and then the paper feeding wheel device (200) sequentially conveys the formed paper bags (101) onto a paper bag output device (600). The paper feeding wheel device (200) includes a main shaft (201) supported and installed by a machine frame wall panel (102), a paper feeding wheel assembly installed on the main shaft (201), a driving cam (205), and a main gear (203) capable of driving the main shaft to rotate. The paper feeding wheel assembly is provided with a claw assembly for clamping and conveying the formed paper bags, and a driving swing piece for driving the claw assembly is further provided on the paper feeding wheel assembly and is matched with the driving cam (205). Through the driving of the driving swing piece, the claw assembly can bite and grab the formed paper bags or release and convey them onto the paper bag output device (600). The paper feeding wheel assembly includes a pair of fixed paper feeding wheels (207) installed on the main shaft and a pair of synchronous paper feeding wheels (208) installed between the pair of fixed paper feeding wheels (207). Card slots are provided on both of the two synchronous paper feeding wheels (208). The claw assembly includes a claw shaft (210) installed through the pair of fixed paper feeding wheels (207) and capable of being driven by the driving swing piece to swing, and two claws (211) installed on the claw shaft (210). The two claws (211) are located at the card slots of the two synchronous paper feeding wheels (208) so as to be able to bite and grab the formed paper bags or release and convey them. The driving swing piece includes a swing gear (209) installed on one of the fixed paper feeding wheels (207) through a pin shaft and capable of swinging with the pin shaft as the center, a first roller bearing (229) also installed on the one of the fixed paper feeding wheels (207) through a first mounting shaft (213), a first spring rod (214) installed on the swing gear (209), and a second spring rod (215) installed on the one of the fixed paper feeding wheels (207). A first spring capable of keeping the first roller bearing (229) in contact with the driving cam (205) is connected between the first spring rod (214) and the second spring rod (215). A claw shaft gear (212) matched with the swing gear (209) is installed on the claw shaft (210).

2. The bag-feeding device for formed paper bags according to claim 1, wherein: The paper suction nozzle device (500) includes a support assembly located below the formed paper bag, mounted on the machine frame wallboard (102) by a rotating shaft and capable of swinging relative to the formed paper bag, a swing arm assembly cooperatively installed with the support assembly, and a suction nozzle tube (504) having a suction nozzle (505) mounted on the support assembly. A gas distribution sleeve cam (206) is mounted on the main shaft (201), and the suction nozzle tube (504) is connected to the gas distribution sleeve cam (206) through an air pipe.

3. The bag conveying device for the formed paper bag according to claim 2, wherein: The swing arm assembly includes a support (506) mounted at one end of the support assembly, a connecting plate (508) hinged to the support (506), and a swing arm (509) hinged to the connecting plate (508). The swing arm (509) is hinged to the machine frame wallboard (102). A suction nozzle cam (217) is mounted on the main shaft (201), and a second roller bearing (511) cooperating with the suction nozzle cam (217) is mounted on the swing arm (509). A second tension spring for pressing the second roller bearing (511) against the suction nozzle cam (217) is also pulled between the machine frame wallboard (102) and the swing arm (509). By the rotation of the suction nozzle cam (217), the swing arm assembly can drive the support assembly to swing relative to the formed paper bag, so that the suction nozzle (505) contacts the formed paper bag to adsorb and convey the formed paper bag.

4. The bag conveying device for formed paper bags according to claim 1, 2 or 3, characterized in that: The main paper bag stacking positioning device (300) includes a sliding shaft (301) supported and installed by the machine frame wallboard (102) and an adjusting assembly arranged in parallel with the sliding shaft (301). A pair of sliding seats (302) are mounted on the sliding shaft (301), and a tray assembly for supporting the formed paper bag is mounted on the pair of sliding seats (302). Inner threaded holes for cooperating with the adjusting assembly are provided on both of the two sliding seats (302). The adjusting assembly has two threaded sections respectively cooperating with the two inner threaded holes. The adjusting assembly is screwed into the inner threaded holes of the sliding seats through the threaded sections and can adjust the positions of the sliding seats on the sliding shaft (301).

5. The bag conveying device for formed paper bags according to claim 4, wherein: The adjusting assembly includes a first adjusting screw (307), a second adjusting screw (309), and a handwheel (312) mounted on the first adjusting screw (307) or the second adjusting screw (309). One threaded section is respectively provided on the first adjusting screw (307) and the second adjusting screw (309). The threaded sections of the first adjusting screw (307) and the second adjusting screw (309) are arranged in opposite directions, so that the two sliding seats (302) can move relatively or in opposite directions to realize the adjustable width of the formed paper bag surface.

6. The bag conveying device for formed paper bags according to any one of claims 1, 2, 3, and 5, characterized in that: The front paper bag positioning device (400) includes a second mounting shaft (401) supported and installed by the machine frame wallboard (102), a fixed seat (402) fixedly mounted on the second mounting shaft, a positioning plate (403) mounted on the fixed seat, and a bottom tray (404) mounted on the positioning plate. The front end of the formed paper bag is limited on the positioning plate and supported by the bottom tray.

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