Device for preparing woven bags

Abstract

The present invention relates to a woven bag preparation technology, specifically to a device for preparing woven bags, which comprises a frame, a bag-stretching device, a bag-grabbing device, a conveying device, a cutting device, a bag-tail clamping device and a bottom-sealing device; the bag-stretching device comprises a holding device and a filling device, which stretch the mouth of the woven bag, the bag-grabbing device grabs the woven bag from the bag-stretching device, the conveying device is used to convey the bag-grabbing device to a working position along the length direction of the woven bag, the cutting device cuts the woven bag with a resistance wire, the bag-tail clamping device clamps the cut woven bag, and the bottom-sealing device sews the bottom of the woven bag with a sewing machine. The reliability of preparing woven bags using the device for preparing woven bags is high, and each step in the movement process of the woven bag is deterministic and controllable, which is more reliable than the solution of using negative pressure to absorb the movement of the woven bag, and the two layers of woven bags at the open end of the prepared woven bag are not adhered.

Description

Technical Field

[0001] The present invention relates to a woven bag preparation technology, specifically to a device for preparing woven bags, which comprises a frame, a bag-stretching device, a bag-grabbing device, a conveying device, a cutting device, a bag-tail clamping device and a bottom-sealing device; the bag-stretching device comprises a holding device and a filling device, which stretch the mouth of the woven bag, the bag-grabbing device grabs the woven bag from the bag-stretching device, the conveying device is used to convey the bag-grabbing device to a working position along the length direction of the woven bag, the cutting device cuts the woven bag with a resistance wire, the bag-tail clamping device clamps the cut woven bag, and the bottom-sealing device sews the bottom of the woven bag with a sewing machine. The reliability of preparing woven bags using the device for preparing woven bags is high, and each step in the movement process of the woven bag is deterministic and controllable, which is more reliable than the solution of using negative pressure to absorb the movement of the woven bag, and the two layers of woven bags at the open end of the prepared woven bag are not adhered. Background Art

[0002] Woven bag making equipment is a relatively mature equipment, but because woven bags are generally cut by hot cutting, the cut woven bags will have different degrees of adhesion at their open ends, which is not conducive to automatically opening the woven bag mouth when the woven bag is used to pack materials. Therefore, it is generally necessary to manually open the bonded bag mouth during the bag making process or before using the woven bag to pack materials, which is inconvenient to use. In addition, the speed of using woven bags on packaging equipment is generally not very fast. For example, it usually takes nearly one minute to use one woven bag on a cheese yarn automatic packaging machine. There are also woven bag making equipment that uses a rubbing device to rub the hot-cut woven bag mouth open, but it may not be rubbed open during the working process.

[0003] In view of the above situation, the present invention designs a device for preparing woven bags, in which the two layers of woven bags at the cut point are in a separated state, so that the woven bags made by hot cutting can ensure that the incision will not fall off and the opening will not stick together. Since the bag making speed of the device for preparing woven bags is not too fast, it is suitable for equipment that uses woven bags for packaging, such as automatic packaging of woven bags of cheese yarn, and the prepared woven bags can be supplied to the packaging equipment for use. Summary of the invention

[0004] In view of the shortcomings of the prior art, the technical problem to be solved by the present invention is to provide a device for preparing woven bags, which is used to automatically prepare woven bags with two layers of woven bags at the open ends that are not adhered to each other. The solution is:

[0005] A device for preparing woven bags, comprising a frame, a bag supporting device, a bag grabbing device, a conveying device, a cutting device, a bag tail clamping device and a bottom sealing device;

[0006] The frame is a frame structure component;

[0007] The bag-holding device comprises a holding device and a filling device.

[0008] The holding device is at least two parallel, rotatable, unpowered rollers mounted on the frame through a bearing seat.

[0009] The filling device includes at least two mutually parallel unpowered rollers serving as retaining rollers, a retaining roller mounting plate, a spouting plate and a spouting side plate, both ends of the retaining roller are mounted on the retaining roller mounting plate to form a frame-like structure, the frame-like structure is assembled between the retaining devices and constrained by the unpowered rollers of the retaining devices, the two spouting plates are mounted in parallel on the retaining roller mounting plate, the two spouting side plates are horizontally arranged long strip plate-like components, the length direction of the spouting plates is perpendicular to the length direction of the retaining rollers, two optical axes are mounted in the vertical direction of the spouting side plates, the optical axes pass through two linear bearings mounted on the retaining roller mounting plate, the length direction of the optical axes is parallel to the retaining rollers, one end of the optical axis is vertically fixedly mounted on the spouting side plate, and a tension spring is installed between the end of the other end and the retaining roller mounting plate on which it is mounted, the spring pulls the two spouting side plates in a direction away from each other, the woven bag passes between the limiting roller and the retaining roller, the structure composed of the retaining roller, the retaining roller mounting plate, the spouting plate and the spouting side plates is located on the inner side of the woven bag, the upper and lower spouting plates and the left and right spouting side plates open the mouth of the woven bag.

[0010] Bag pressing cylinders are respectively installed on the upper and lower sides of the two opening support plates. When the cylinder rods of the bag pressing cylinders are extended, the two opening support plates are pressed to move closer to each other.

[0011] The bag grabbing device comprises a bag grabbing flip plate, a bag grabbing lower pressure plate, a bag grabbing lower pressure plate cylinder, a bag grabbing upper pressure plate, a bag grabbing upper pressure plate cylinder, a bag grabbing flip plate hinge, a bag grabbing flip cylinder, and a bag grabbing mounting plate. The bag grabbing lower pressure plate is installed at the end of the cylinder rod of the bag grabbing lower pressure plate cylinder, the bag grabbing upper pressure plate is installed at the end of the cylinder rod of the bag grabbing upper pressure plate cylinder, the bag grabbing lower pressure plate cylinder and the bag grabbing upper pressure plate cylinder are installed on the grooved bag grabbing flip plate, and the bag grabbing lower pressure plate is installed at the end of the cylinder rod of the bag grabbing lower pressure plate cylinder. The grooves of the pressure plate and the upper pressure plate of the grab bag are opposite to those of the grab bag flip plate. When the cylinder rods of the cylinders of the lower pressure plate of the grab bag and the upper pressure plate of the grab bag are retracted, the upper and lower support plates are respectively located between the lower pressure plate of the grab bag, the upper pressure plate of the grab bag and the inner sides of the grab bag flip plate. When the cylinder rods of the cylinders of the lower pressure plate of the grab bag and the upper pressure plate of the grab bag are extended, the lower pressure plate of the grab bag and the upper pressure plate of the grab bag respectively grasp the edge of the woven bag supported by the support plate between the inner sides of the grab bag flip plate. The grab bag flip plate is swingably suspended and installed under the grab bag mounting plate through the grab bag flip plate hinge. The cylinder rod of the grab bag flip cylinder installed on the grab bag mounting plate is connected to the grab bag flip plate through a fisheye bearing. The grab bag flip cylinder pulls the grab bag flip plate to swing between the horizontal position and the plumb bob position.

[0012] The conveying device comprises a bag moving guide element and a bag moving drive element. The bag moving drive element drives the bag grabbing device to move along the bag moving guide element. The conveying device is used to convey the bag grabbing device to a working position along the length direction of the woven bag.

[0013] The cutting device comprises a resistance wire and a resistance wire driving component, and the resistance wire driving component drives the horizontal resistance wire to move in the plumb direction to cut the woven bag.

[0014] The bag tail clamping device comprises a clamping assembly and a bag tail moving assembly, the clamping assembly comprises a lower bag clamping cylinder, a lower bag clamping rod, an upper bag clamping rod, an upper bag clamping cylinder, and a bag clamping frame, and the bag tail moving assembly comprises a bag clamping and delivering cylinder, a bag clamping frame guide rail, and a bag clamping frame slider. The bag clamping frame is a rectangular frame with an opening at the top, and the cylinder rods of the two lower bag clamping cylinders and the two upper bag clamping cylinders are relatively installed on the bag clamping frame, and the two sections of the lower bag clamping rods and the two sections of the upper bag clamping rods are respectively installed on the cylinder rods of the two lower bag clamping cylinders and the two upper bag clamping cylinders, the bag clamping frame is suspended and installed below the bag clamping frame slider, and the bag clamping frame slider is suspended and movably assembled below the bag clamping frame guide rail installed on the frame, the bag clamping and delivering cylinder is installed on the frame, and the cylinder rod of the bag clamping and delivering cylinder is installed on the bag clamping frame, and the bag clamping frame guide rail is parallel to the bag moving guide rail. When the cylinder rods of the lower bag clamping cylinder and the upper bag clamping cylinder are extended, the adjacent surfaces of the lower bag clamping rod and the upper bag clamping rod are at the same height as the side plate of the support opening.

[0015] The bottom sealing device includes a sewing machine and a sewing machine moving drive guide component. The sewing machine moving drive guide component includes a seam moving belt, a seam guide rail, a seam motor, and a seam bracket. The sewing machine can be slidably assembled on the seam guide rail on the seam bracket through a slider, and is horizontally moved by the seam motor through the seam moving belt. The moving direction of the sewing machine is perpendicular to the length direction of the bag transfer guide rail, and the height of the sewing area of ​​the sewing machine is the same as the height of the support side plate.

[0016] By means of the above mechanism, the working principle of the device for preparing woven bags is as follows: the head end of the rolled woven bag tube material is pulled out, the open end of the woven bag is passed between the holding device and the filling device, the woven bag surrounds the filling device in the woven bag, and the bag grabbing device grabs the edge of the woven bag supported by the opening plate; the bag moving motor of the conveying device drives the bag grabbing device to move away from the opening plate to pull the woven bag to the expected length, and the bag grabbing device stops moving; the bag pressing cylinder presses the two opening plates closer to each other, so that the resistance wire for bag cutting cuts the woven bag; the bag tail clamping device clamps The woven bag is held, and the resistance wire of the cutting device is lifted to thermally cut the woven bag; the bag tail clamping device drives the tail of the woven bag to move to a position away from the cutting device, and the bag grabbing device continues to move in the direction away from the opening plate, and the sewing machine of the bottom sealing device sews the bottom of the woven bag; the bag tail clamping device releases the woven bag, and the bag grabbing device continues to move in the direction away from the opening plate to the process position where it needs to release the woven bag, and then releases the woven bag, and the conveying device returns to the position of clamping the woven bag in the direction close to the opening plate, and a new woven bag preparation process can be started. The reliability of preparing woven bags using the device for preparing woven bags is high, and each step in the process of moving the woven bag is deterministic and controllable, which is more reliable than the solution of using negative pressure to absorb the movement of the woven bag. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The present invention is a schematic structural oblique side view of an embodiment of a device for preparing a woven bag.

[0018] Figure 2 The present invention is a schematic diagram of a front structural view of an embodiment of a device for preparing a woven bag.

[0019] Figure 3 The present invention is a schematic top view of the structure of an apparatus for preparing woven bags according to an embodiment of the present invention.

[0020] Figure 4 It is a schematic left view of the structure of an embodiment of a device for preparing woven bags of the present invention.

[0021] Figure 5 The present invention is a schematic diagram of the principle of a bag-supporting device for preparing a woven bag according to an embodiment of the present invention.

[0022] Figure 6 The present invention is a schematic diagram of the principle of a filling device for preparing a woven bag according to an embodiment of the present invention.

[0023] Figure 7 The present invention is a schematic diagram of the principle of a bag grabbing device in an embodiment of a device for preparing woven bags.

[0024] In the figure: 10. Frame 20. Limit roller 21. Holding roller 22. Bag pressing cylinder 23. Holding roller mounting plate 24. Opening plate 25. Opening side plate 26. Bearing seat 27. Optical axis 28. Linear bearing 30. Grab bag flip plate 301. Grab bag lower pressure plate 302. Grab bag lower pressure plate cylinder 303. Grab bag upper pressure plate 304. Grab bag upper pressure plate cylinder 305. Grab bag flip plate hinge 306. Grab bag flip cylinder 307. Grab bag mounting plate 31 .Bag transfer rail 32. Bag transfer slider 33. Bag transfer motor 34. Bag transfer belt 35. Bag transfer reinforcement rod 40. Bag cutting bracket 41. Bag cutting cylinder 50. Seam moving belt 51. Seam guide rail 52. Seam bracket 53. Seam motor protective cover 54. Sewing machine 60. Lower bag clamping cylinder 61. Bag clamping and transfer cylinder 62. Lower bag clamping rod 63. Upper bag clamping rod 64. Upper bag clamping cylinder 65. Bag clamping frame 66. Bag clamping frame slider 67. Bag clamping frame rail DETAILED DESCRIPTION

[0025] A specific embodiment of the device for preparing woven bags of the present invention is given below in conjunction with the drawings. The embodiment is only an example of the present invention and does not constitute a limitation of the claims of the present invention. The matters not described in the present invention are applicable to the prior art.

[0026] A device for preparing woven bags, comprising a frame, a bag supporting device, a bag grabbing device, a conveying device, a cutting device, a bag tail clamping device and a bottom sealing device;

[0027] The frame is a frame structure component;

[0028] The bag-holding device comprises a holding device and a filling device.

[0029] The holding device is two parallel and rotatable limiting rollers 20 (of course, two each on the upper and lower sides are not excluded) mounted on the frame 10 through the bearing seat 26. The limiting rollers 20 are unpowered rollers.

[0030] The filling device comprises a retaining roller 21 (unpowered roller), a retaining roller mounting plate 23, a support plate 24 and a support side plate 25. The two ends of the four retaining rollers 21 are mounted on the retaining roller mounting plate 23 to form a frame-like structure. The frame-like structure is assembled between the limiting rollers 20 and is constrained by the upper and lower limiting rollers 20. It is not excluded to adopt four limiting rollers 20 in combination with two retaining rollers 21, or four limiting rollers 20 with 8 retaining rollers, etc., as long as the retaining device can limit the filling device to the inside, the support plate 24 is mounted on the retaining roller mounting plate 23, and the two support side plates 25 are long plate-like components. The support side plates 25 are arranged in the vertical direction. Two optical axes 27 are installed, and the optical axis 27 passes through two linear bearings 28 installed on the retaining roller mounting plate 23. The length direction of the optical axis 27 is parallel to the retaining roller 21. One end of the optical axis 27 is vertically fixed on the support side plate 25, and a tension spring is installed between the end of the other end and the retaining roller mounting plate 23 on which it is installed. The spring pulls the two support side plates 25 away from each other, and the woven bag passes between the limiting roller 20 and the retaining roller 21. The structure composed of the retaining roller 21, the retaining roller mounting plate 23, the support plate 24 and the support side plates 25 is located on the inner side of the woven bag, and the upper and lower support plates 24 and the left and right support side plates 25 open the mouth of the woven bag.

[0031] In order to control the spacing of the woven bag opened by the upper and lower opening plates 24, a bag pressing cylinder 22 is installed on the upper and lower sides of the two opening plates 24. When the cylinder rod of the bag pressing cylinder 22 is extended, the two opening plates 24 are pressed closer to each other, making it easier for the bag cutting resistance wire to cut the woven bag. If the spacing between the two opening plates 24 is large, the upper and lower layers of the incision after the resistance wire cuts the woven bag are easily misaligned.

[0032] The bag grabbing device comprises a bag grabbing flip plate 30, a bag grabbing lower pressure plate 301, a bag grabbing lower pressure plate cylinder 302, a bag grabbing upper pressure plate 303, a bag grabbing upper pressure plate cylinder 304, a bag grabbing flip plate hinge 305, a bag grabbing flip cylinder 306, and a bag grabbing mounting plate 307.

[0033] The bag grabbing lower pressure plate 301 is installed at the end of the cylinder rod of the bag grabbing lower pressure plate cylinder 302, and the bag grabbing upper pressure plate 303 is installed at the end of the cylinder rod of the bag grabbing upper pressure plate cylinder 304. The bag grabbing lower pressure plate cylinder 302 and the bag grabbing upper pressure plate cylinder 304 are installed on the grooved bag grabbing flip plate 30. The bag grabbing lower pressure plate 301 and the bag grabbing upper pressure plate 303 are opposite to the groove of the bag grabbing flip plate 30. The bag grabbing lower pressure plate cylinder 302 and the bag grabbing upper pressure plate cylinder 304 are installed on the grooved bag grabbing flip plate 30. When the cylinder rod of the upper pressure plate cylinder 304 is retracted, the upper and lower opening plates 24 are respectively located between the grab bag lower pressure plate 301, the grab bag upper pressure plate 303 and the inner side of the grab bag flip plate. When the cylinder rods of the grab bag lower pressure plate cylinder 302 and the grab bag upper pressure plate cylinder 304 are extended, the grab bag lower pressure plate 301 and the grab bag upper pressure plate 303 respectively grasp the edge of the woven bag supported by the opening plate 24 between the inner side of the grab bag flip plate. The grab bag flip plate 30 is swingably suspended and installed below the grab bag mounting plate 307 through the grab bag flip plate hinge 305. The cylinder rod of the grab bag flip cylinder 306 installed on the grab bag mounting plate 307 is connected to the grab bag flip plate 30 through a fisheye bearing. The grab bag flip cylinder 306 pulls the grab bag flip plate 300 to swing between the horizontal position and the plumb bob position.

[0034] The conveying device includes a bag moving guide rail 31 and a bag moving slider 32 as bag moving guide elements, and a bag moving motor 33, a bag moving belt 34, and a bag moving reinforcement rod 35 as bag moving driving elements. The bag grabbing mounting plate 307 is fixedly installed under the bag moving slider 32. The bag moving slider 32 is dragged along the bag moving guide rail 31 by the bag moving motor 33 installed on the frame 10 through the bag moving belt 34. In order to increase the rigidity of the bag moving guide rail 31, the bag moving guide rail 31 is installed under the bag moving reinforcement rod 35. The conveying device is used to transport the bag grabbing device to the working position along the length direction of the woven bag.

[0035] The cutting device includes a bag cutting bracket 40, a bag cutting cylinder 41 and a resistance wire. The bag cutting cylinder 41 is installed on the frame 10. The bag cutting bracket 40 is a rod-shaped component installed on the cylinder rod of the bag cutting cylinder 41. The two ends of the resistance wire are fixed to the ends of the rods erected at both ends of the bag cutting bracket 40.

[0036] The bag tail clamping device comprises a lower bag clamping cylinder 60, a bag clamping and conveying cylinder 61, a lower bag clamping rod 62, an upper bag clamping rod 63, an upper bag clamping cylinder 64, a bag clamping frame 65, a bag clamping frame guide rail 67, and a bag clamping frame slider 66. The bag clamping frame 65 is a rectangular frame with an opening at the top. The opening at the top of the bag clamping frame 65 is for facilitating the passage of the bag grabbing device. The cylinder rods of the two lower bag clamping cylinders 60 and the two upper bag clamping cylinders 64 are relatively installed on the bag clamping frame 65. The two sections of the lower bag clamping rods 62 and the two sections of the upper bag clamping rods 63 are respectively installed on the bag clamping frame 65. The bag clamping frame 65 is suspended and installed on the cylinder rods of the two lower bag clamping cylinders 60 and the two upper bag clamping cylinders 64 below the bag clamping frame slider 66, and the bag clamping frame slider 66 is suspended and movably assembled below the bag clamping frame guide rail 67 installed on the frame 10. The bag clamping and conveying cylinder 61 is installed on the frame 10, and the cylinder rod of the bag clamping and conveying cylinder 61 is installed on the bag clamping frame 65. The bag clamping and conveying cylinder 61 drives the bag clamping frame 65 to move along the length direction of the bag clamping frame guide rail 67, and the bag clamping frame guide rail 67 is parallel to the bag transfer guide rail 31. When the cylinder rods of the lower bag clamping cylinder 60 and the upper bag clamping cylinder 64 are extended, the adjacent surfaces of the lower bag clamping rod 62 and the upper bag clamping rod 63 are at the same height as the support opening side plate 25.

[0037] The bottom sealing device comprises a sewing machine 54, a seam moving belt 50, a seam guide rail 51, a seam bracket 52, and a seam motor protective cover 53. The sewing machine 54 is slidably mounted on the seam guide rail 51 on the seam bracket 52 through a slider, and is horizontally moved by the seam motor in the seam motor protective cover 53 through the seam moving belt 50. The moving direction of the sewing machine 54 is perpendicular to the length direction of the bag transfer guide rail 31, and the height of the sewing area of ​​the sewing machine is the same as the height of the support side plate 25.

[0038] By means of the above mechanism, the working principle of the device for preparing woven bags is as follows: the head end of the rolled woven bag tube material is pulled out, and the open end of the woven bag is passed between the limiting roller 20 and the holding roller 21, the woven bag surrounds the filling device in the woven bag, and the upper and lower opening plates 24 and the left and right opening side plates 25 open the opening of the woven bag, and the cylinder rod of the bag grabbing and flipping cylinder 306 extends out to drive the bag grabbing and flipping plates 30 to change to the plumb bob direction, and the bag grabbing device moves toward the direction of the woven bag opening supported by the opening plates, until the woven bag outside the upper and lower opening plates 24 are respectively located between the bag grabbing lower pressure plate 301, the bag grabbing upper pressure plate 303 and the inner side of the bag grabbing and flipping plates, the cylinder rods of the bag grabbing lower pressure plate cylinder 302 and the bag grabbing upper pressure plate cylinder 304 extend out, and the bag grabbing lower pressure plate 301 and the bag grabbing upper pressure plate 303 respectively grasp the edge of the woven bag supported by the opening plate 24 between the inner side of the bag grabbing and flipping plates;

[0039] The bag moving motor 33 of the conveying device drives the bag grabbing device to move away from the opening plate 24, and continuously pulls out the woven bag. When the length of the pulled woven bag reaches the expected length, the bag grabbing device stops moving.

[0040] The cylinder rod of the bag pressing cylinder 22 extends out, pressing the two opening plates 24 to move closer to each other, so that the resistance wire of the bag cutting can cut the woven bag;

[0041] The cylinder rod of the bag clamping and conveying cylinder 61 of the bag tail clamping device extends out, pushing the bag clamping frame 65 to move to a position close to the cutting device, the lower bag clamping cylinder 60 and the upper bag clamping cylinder 64 extend out, and the lower bag clamping rod 62 and the upper bag clamping rod 63 clamp the woven bag. At this time, the lower bag clamping rod 62 and the upper bag clamping rod 63 are located on one side of the resistance wire, and the support plate 24 is located on the other side of the resistance wire. The bag cutting cylinder 41 of the cutting device drives the resistance wire to lift up, and the woven bag is thermally cut during the process of the resistance wire being lifted up;

[0042] The cylinder rod of the bag clamping and conveying cylinder 61 is retracted, pulling the bag clamping frame 65 to move to a position away from the cutting device, and the bag moving motor 33 of the conveying device also drives the bag grabbing device to continue to move away from the opening plate 24 by the same distance as the stroke of the bag clamping and conveying cylinder 61. At this time, the sewing area of ​​the sewing machine 54 of the bottom sealing device is just aligned with the woven bag clamped by the lower bag clamping rod 62 and the upper bag clamping rod 63. When the sewing machine 54 is started, the seam motor drives the sewing machine to move along the seam guide rail 51 to sew the bottom of the woven bag;

[0043] The lower bag clamping cylinder 60 and the upper bag clamping cylinder 64 of the bag tail clamping device are retracted, the lower bag clamping rod 62 and the upper bag clamping rod 63 release the woven bag, and the bag moving motor 33 of the conveying device drives the bag grabbing device to continue to move in the direction away from the opening plate 24 to the process position where it needs to release the woven bag, and the woven bag between the bag grabbing lower pressure plate 301, the bag grabbing upper pressure plate 303 and the inner side of the bag grabbing flip plate is put on the opening of the woven bag, and the cylinder rods of the bag grabbing lower pressure plate cylinder 302 and the bag grabbing upper pressure plate cylinder 304 are retracted;

[0044] The cylinder rod of the bag grabbing and flipping cylinder 306 retracts and drives the bag grabbing and flipping plate 30 to be lifted upward and turned into a horizontal direction;

[0045] The bag moving motor 33 of the conveying device drives the bag grabbing device to return to the position where the woven bag is clamped on the opening plate 24 in the direction close to the opening plate 24, and a new woven bag preparation process can be started.

[0046] The present invention is not limited to the embodiments discussed above, and a person skilled in the art may deduce other variants based on the present invention, which also belong to the subject matter of the present invention.

Claims

1. A device for preparing woven bags, characterized in that: It includes a frame, a bag supporting device, a bag grabbing device, a conveying device, a cutting device, a bag tail clamping device and a bottom sealing device. The frame is a frame structure component. The bag-supporting device comprises a holding device and a filling device, wherein the holding device is at least two parallel, rotatable non-powered rollers mounted on a frame through a bearing seat, and the filling device comprises at least two mutually parallel non-powered rollers as holding rollers, a holding roller mounting plate, and both ends of the holding rollers are mounted on the holding roller mounting plate to form a frame-like structure, and the frame-like structure is assembled between the holding devices. The bag grabbing device comprises a bag grabbing flip plate, a bag grabbing lower pressure plate, a bag grabbing lower pressure plate cylinder, a bag grabbing upper pressure plate, a bag grabbing upper pressure plate cylinder, a bag grabbing flip plate hinge, a bag grabbing flip cylinder, and a bag grabbing mounting plate. The bag grabbing lower pressure plate is installed at the end of the cylinder rod of the bag grabbing lower pressure plate cylinder, the bag grabbing upper pressure plate is installed at the end of the cylinder rod of the bag grabbing upper pressure plate cylinder, the bag grabbing lower pressure plate cylinder and the bag grabbing upper pressure plate cylinder are installed on the grooved bag grabbing flip plate, the bag grabbing flip plate is swingably suspended and installed below the bag grabbing mounting plate through the bag grabbing flip plate hinge, and the cylinder rod of the bag grabbing flip cylinder installed on the bag grabbing mounting plate is connected to the bag grabbing flip plate through a fisheye bearing. The conveying device comprises a bag transfer guide element and a bag transfer driving element, wherein the bag transfer driving element drives the bag grabbing device to move along the bag transfer guide element. The cutting device comprises a resistance wire and a resistance wire driving component. The bag tail clamping device comprises a clamping component and a bag tail moving component. The clamping assembly comprises a lower bag clamping cylinder, a lower bag clamping rod, an upper bag clamping rod, an upper bag clamping cylinder, and a bag clamping frame. The bag tail moving assembly comprises a bag clamping and delivering cylinder, a bag clamping frame guide rail, and a bag clamping frame slider. The bag clamping frame is a rectangular frame with an opening at the top. The cylinder rods of the two lower bag clamping cylinders and the two upper bag clamping cylinders are relatively installed on the bag clamping frame. The two sections of the lower bag clamping rod and the two sections of the upper bag clamping rod are respectively installed on the cylinder rods of the two lower bag clamping cylinders and the two upper bag clamping cylinders. The bag clamping frame is suspended and installed below the bag clamping frame slider. The bag clamping frame slider is suspended and movably assembled below the bag clamping frame guide rail installed on the frame. The bag clamping and delivering cylinder is installed on the frame, and the cylinder rod of the bag clamping and delivering cylinder is installed on the bag clamping frame. The bottom sealing device comprises a sewing machine and a sewing machine moving driving guide component.

2. The device for preparing woven bags according to claim 1, characterized in that: The filling device includes a support plate and a support side plate. The two support plates are installed in parallel on the retaining roller mounting plate. The two support side plates are horizontally arranged long plate-like components. The length direction of the support plate is perpendicular to the length direction of the retaining roller. Two optical axes are installed in the vertical direction of the support side plates. The optical axes pass through two linear bearings installed on the retaining roller mounting plate. The length direction of the optical axes is parallel to the retaining roller. One end of the optical axis is vertically fixed on the support side plate, and a tension spring is installed between the end of the other end and the retaining roller mounting plate on which it is installed.

3. The device for preparing woven bags according to claim 1, characterized in that: The grab bag lower pressure plate and the grab bag upper pressure plate are opposite to the groove of the grab bag turning plate, and the grab bag turning cylinder pulls the grab bag turning plate to swing between a horizontal position and a plumb bob position.

4. The device for preparing woven bags according to claim 1, characterized in that: The resistance wire driving component drives the horizontal resistance wire to move along the plumb direction to cut the woven bag.

5. The device for preparing woven bags according to claim 2, characterized in that: When the cylinder rods of the bag grabbing lower pressure plate cylinder and the bag grabbing upper pressure plate cylinder are retracted, the upper and lower opening plates are respectively located between the bag grabbing lower pressure plate, the bag grabbing upper pressure plate and the inner side of the bag grabbing flip plate.

6. The device for preparing woven bags according to claim 1, characterized in that: The bag clamping and conveying cylinder drives the bag clamping frame to move along the length direction of the bag clamping frame guide rail, and the bag clamping frame guide rail is parallel to the bag transfer guide rail.

7. The device for preparing woven bags according to claim 1, characterized in that: The sewing machine moving drive guide component includes a seam moving belt, a seam guide rail, a seam motor, and a seam bracket. The sewing machine can be slidably assembled on the seam guide rail on the seam bracket through a slider, and is horizontally moved by the seam motor through the seam moving belt. The moving direction of the sewing machine is perpendicular to the length direction of the bag transfer guide rail, and the height of the sewing area of ​​the sewing machine is the same as the height of the support side plate.

8. The device for preparing woven bags according to claim 2, characterized in that: The upper and lower sides of the two opening-supporting plates are respectively provided with bag-pressing cylinders, and when the cylinder rods of the bag-pressing cylinders are extended, the two opening-supporting plates are pressed to approach each other.

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