Woven bag bottom sewing device

Abstract

The invention relates to the technical field of woven bag processing, in particular to a woven bag bottom sewing device which comprises a machine frame, a fixed side plate, a bottom plate and a fixed box installed on one side of the bottom of the machine frame, the bottom plate is fixedly installed at the center of the top of the machine frame through bolts, and transmission rollers are movably connected to the positions, on the two sides of the bottom plate, of the machine frame through bearings. A friction belt is movably connected between the two ends of the outer side of the transmission roller on the bottom plate, the friction belt moves on the peripheries of the two ends between the transmission roller and the bottom plate, and fixed side plates are fixedly installed at the centers of the two ends of one side of the top of the rack through bolts. Air is sucked through the positioning air suction holes, so that the woven bag is well attached to the bottom plate and the friction belt during sewing, dislocation and wrinkling are avoided during sewing, a rack plate drives a piston plate in an air exchange cylinder to move through a movable plate and a movable groove, the piston plate forms negative pressure in the air exchange cylinder, and the air exchange cylinder is driven to rotate. Air suction action is performed on the positioning air suction hole through the first guide pipe, and sewing is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of woven bag processing, in particular to a woven bag bottom sewing device. Background Art

[0002] Woven bags are a type of plastic packaging bag, also known as snakeskin bags, which are widely used in the packaging of fertilizers, chemical products and other items; their raw materials are generally chemical raw materials such as polyethylene and polypropylene; the currently commonly used sewing process is to use an industrial sewing machine for needle sewing; the industrial sewing machine is set on one side of the woven bag conveying track, and pressure plates are set on both sides of the sewing needle of the sewing machine to press the woven bag to prevent the woven bag from deviating due to the sewing process; the woven bag is transported by the conveyor, and when one end of the woven bag enters under the sewing machine, the bottom sewing begins.

[0003] In the existing bottom sewing process, since a pressing plate is used under the sewing machine to press the woven bag, and the other parts of the woven bag are continued to move forward under the transmission of the conveyor, the part of the woven bag pressed by the pressing plate is subjected to a certain friction force, resulting in wrinkles on the woven bag at the bottom of the seam. The wrinkles not only affect the quality of the bottom of the seam during the sewing process, but even cause damage to the sewing needle in severe cases, affecting the service life of the sewing machine. When sewing the bottom, the woven bag cannot be well fitted, and stable friction transmission in the sewing process cannot be guaranteed, which not only causes wrinkles but also causes sewing misalignment, thereby causing the woven bag mouth to be uneven and unusable. In addition, the friction generated by the transmission after sewing the bottom will cause static electricity between the woven bag and the machine body, making it impossible for the woven bag to be detached stably and easily stuck, greatly affecting the efficiency. Summary of the invention

[0004] In order to overcome the deficiencies of the prior art, the present invention provides a woven bag bottom sewing device.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: comprising a frame, fixed side plates arranged on both sides of the top of the frame, a bottom plate arranged at the center of the top of the frame and a fixed box installed on one side of the bottom of the frame, the bottom plate is fixedly installed at the center of the top of the frame by bolts, a transmission roller is movably connected to the frame at both sides of the bottom plate by bearings, a friction belt is movably connected between the outer ends of the transmission roller on the bottom plate, and the friction belt moves around the outer periphery of both ends between the transmission roller and the bottom plate, the fixed side plates are fixedly installed at the centers of both ends of one side of the top of the frame by bolts, a fixing rod is fixedly installed between the fixed side plates by bolts, a supporting plate with a friction roller is fixedly installed between the fixing rods by bolts, an organic board is fixedly installed at the center of one side of the top of the frame by bolts, a sewing machine body for sewing the bottom of a woven bag is fixedly installed at the center of one side of the top of the machine plate by bolts, a positioning component for positioning the woven bag is arranged in the fixed box, and the positioning component includes:

[0006] A positioning suction hole for sewing a woven bag, wherein a plurality of the positioning suction holes are evenly opened on the bottom plate at one side of the bottom of the sewing machine body, and the bottom of the positioning suction hole extends through the suction seat at the bottom center of the bottom plate, and a ventilation cylinder is installed on one side of the bottom of the frame through a connecting rod, and the bottom center of the suction seat is connected to the outer side of one end of the ventilation cylinder through a first conduit;

[0007] An air outlet connection seat for positioning the woven bag after it is dropped off, wherein the air outlet connection seat with a plurality of air jets is fixedly mounted on one end of the top of the frame by bolts, and the center of one side of the air outlet connection seat is connected to the outer side of one end of the ventilation cylinder through a second conduit;

[0008] A swing shaft for concentrating the bottom of the woven bag, one side of the bottom of the frame is connected to the swing shaft through a bearing, one end of the swing shaft passes through the bearing and extends into the fixed box, and a rotating gear is fixedly installed on the swing shaft in the fixed box by bolts, a hydraulic telescopic rod is fixedly installed at one end inside the fixed box by bolts, and a rack plate meshing with the rotating gear is fixedly installed on the top of the hydraulic telescopic rod by bolts.

[0009] As a preferred technical solution of the present invention, the support plate is fixedly installed between the two ends of the fixing rod by bolts, a plurality of connecting plates are fixedly installed on one side of the support plate by bolts, one end of the support plate is connected to the friction roller through a rotating shaft on the bottom of the connecting plate, the other end of the support plate is connected to the limiting roller through a rotating shaft on the bottom of the connecting plate, a rotating roller is arranged on the bottom of the connecting plate between the friction roller and the limiting roller, and the support plates are all located on the top side of the friction belt.

[0010] A driving frame with a driving motor is fixedly installed on one side of the bottom of the frame by bolts, one end of the transmission roller passes through the bearing on the frame and is connected to a driven pulley, the output end of the driving motor is connected to a driving pulley through a rotating shaft, and a transmission belt ring is tensionedly connected between the driving pulley and the driven pulley.

[0011] As a preferred technical solution of the present invention, a spiral curling cylinder for curling one end of the bottom of the woven bag is fixedly installed on the top of the frame by bolts on one side of the machine plate, a spiral plate is fixedly installed on the bottom plate inside the spiral curling cylinder by bolts, and a square-structured pressure plate is fixedly installed on one end of the spiral curling cylinder close to the sewing machine body by bolts.

[0012] The swing shaft moves on the bottom side of the limiting roller, and a plurality of swing rods for swinging the woven bag off are evenly installed on the top side of the swing shaft, and the air outlet connection seat is arranged on the top side of the swing rod. An emergency button is fixedly installed on the top side of the frame by bolts, and a controller for controlling the hydraulic telescopic rod and the driving motor is fixedly installed on the other side of the top of the frame by bolts.

[0013] As a preferred technical solution of the present invention, a T-shaped slide groove is opened at the center of one side of the top of the fixed box, and a T-shaped slider is slidably connected to the fixed box in the T-shaped slide groove. The top center of the rack plate is fixedly installed on the bottom end of the T-shaped slider by bolts, and a movable plate is fixedly installed on the outer side of one end of the rack plate by bolts, and a piston plate is movably arranged inside the air exchange cylinder, and a piston rod is fixedly installed at the center of one side of the piston plate by bolts, and one end of the piston rod is connected to the center of one side of the movable plate through.

[0014] A movable groove matching the size of the movable plate is opened on one side of the fixed box, and the movable plate moves through the movable groove. A movable hole matching the size of the rack plate is opened at the top center of one end of the fixed box, and the rack plate moves in the movable hole.

[0015] As a preferred technical solution of the present invention, a mounting rod is fixedly installed on the frame at the bottom of one end of the sewing machine body by bolts, an operating table is fixedly installed between the top ends of the mounting rod and the frame by bolts, one-way valves are provided on the first conduit and the second conduit, a support frame with a bobbin is fixedly installed on the top of the machine plate at both ends of one side of the sewing machine body by bolts, and the sewing head of the sewing machine body is arranged at the center of one side of the edge pressing plate.

[0016] Compared with the prior art, the present invention can achieve the following beneficial effects:

[0017] 1. The friction belt cooperates with the friction roller and the rotating roller under the support plate to transport the woven bag on the top of the bottom plate. The spiral plate is cooperated in the spiral curling cylinder to fold and curl one end. The woven bag with overlapping curling edges is sewn under the sewing machine body to achieve a stable sewing effect on the bottom of the woven bag.

[0018] 2. Air is sucked through the positioning suction hole, so that the woven bag is well fitted with the bottom plate and the friction belt during sewing, and no dislocation and wrinkles will occur during sewing. The rack plate drives the piston plate in the air exchange cylinder to move through the movable plate and the movable groove. The piston plate forms negative pressure in the air exchange cylinder, and the positioning suction hole is sucked through the first conduit to achieve sewing;

[0019] 3. When the piston plate forms negative pressure in the air exchange cylinder, the rack plate drives the swing shaft on the rotating gear to move, and the rack plate and the rotating gear are used to flip and swing the swing shaft and the swing rod, driving the woven bags under the limiting roller from the vertical state to the horizontal state, so as to realize the centralized stacking of the seam bottom of the woven bags and ensure the stable structural connection.

[0020] 4. The air discharged from the air exchange cylinder enters the air outlet connection seat through the second conduit. The air outlet connection seat blows air to separate the woven bag from the friction belt to prevent the woven bag from getting stuck on the frame due to static electricity. The design is ingenious and can achieve centralized stacking of the woven bags, reducing labor intensity.

[0021] 5. Through the meshing and rotation of the rack plate and the rotating gear, the air inlet in the ventilator can position the woven bag and the air outlet can separate the woven bag. The design structure is stable and the connection is ingenious. The air outlet swings the swing rod to realize the stacking of the woven bag, and the air inlet swing rod is reset to wait for the next sewing discharge. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 The overall structure of the present invention is shown in FIG. Figure 1 ;

[0023] Figure 2 The overall structure of the present invention is shown in FIG. Figure 2 ;

[0024] Figure 3 For the present invention Figure 1 Schematic diagram of the internal structure of the middle drive frame;

[0025] Figure 4 For the present invention Figure 1 Schematic diagram of the middle frame structure;

[0026] Figure 5 For the present invention Figure 4 Schematic diagram of the bottom structure of the middle rack;

[0027] Figure 6 For the present invention Figure 1 Schematic diagram of the connection structure of the middle support plate;

[0028] Figure 7 For the present invention Figure 2 Schematic diagram of the internal structure of the middle fixed box;

[0029] Figure 8 For the present invention Figure 2 Schematic diagram of the connection structure of the fixed box.

[0030] Among them: 10, frame; 11, machine plate; 12, sewing machine body; 13, driving motor; 14, driving frame; 15, driven pulley; 16, driving pulley; 17, driving belt ring; 18, emergency button; 19, controller; 20, fixed side plate; 21, fixed rod; 22, friction roller; 23, support plate; 24, connecting plate; 25, limit roller; 26, rotating roller; 30, fixed box; 31, swing shaft; 32, rotating gear; 33, hydraulic telescopic rod; 34, rack plate; 35, swing rod; 36, rotating gear; 37, hydraulic telescopic rod; 38, hydraulic telescopic rod; 39, hydraulic telescopic rod; 40, hydraulic telescopic rod; 41, hydraulic telescopic rod; 42, hydraulic telescopic rod; 43, hydraulic telescopic rod; 44, hydraulic telescopic rod; 45, hydraulic telescopic rod; 46, hydraulic telescopic rod; 47, hydraulic telescopic rod; 48, hydraulic telescopic rod; 49, hydraulic telescopic rod; 50, hydraulic telescopic rod; 51, hydraulic telescopic rod; 52, hydraulic telescopic rod; 53, hydraulic telescopic rod; 54, hydraulic telescopic rod; 55, hydraulic telescopic rod; 56, hydraulic telescopic rod; 57, hydraulic telescopic rod; 58, hydraulic telescopic rod; 59, hydraulic telescopic rod; 60, hydraulic telescopic rod; 61, hydraulic telescopic rod; 62, hydraulic telescopic rod; 63, hydraulic telescopic rod; 64, hydraulic telescopic rod; 65, hydraulic telescopic rod; 66, hydraulic telescopic rod; 67, hydraulic telescopic rod; 68, hydraulic telescopic rod; 69, hydraulic telescopic rod; 70, hydraulic telescopic rod; 71, hydraulic telescopic rod; 72, hydraulic telescopic rod; 73, hydraulic telescopic rod; 6. T-shaped slide groove; 37. T-shaped slider; 38. movable groove; 39. movable hole; 40. bottom plate; 41. transmission roller; 42. friction belt; 43. positioning suction hole; 44. suction seat; 45. spiral curling cylinder; 46. spiral plate; 47. edge pressure plate; 50. air exchange cylinder; 51. first duct; 52. air outlet connection seat; 53. second duct; 54. movable plate; 55. piston plate; 56. piston rod; 57. one-way valve; 58. connecting rod; 60. mounting rod; 61. operating table; 62. support frame. DETAILED DESCRIPTION

[0031] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific embodiments, but the following embodiments are only preferred embodiments of the present invention, not all. Based on the embodiments in the implementation mode, other embodiments obtained by those skilled in the art without creative work all belong to the protection scope of the present invention. The experimental methods in the following embodiments, unless otherwise specified, are conventional methods, and the materials, reagents, etc. used in the following embodiments, unless otherwise specified, can all be obtained from commercial channels.

[0032] Embodiment: Figure 1 , Figure 2 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8As shown, the frame 10 includes a fixed side plate 20 arranged on both sides of the top of the frame 10, a bottom plate 40 arranged at the center of the top of the frame 10, and a fixed box 30 installed on one side of the bottom of the frame 10. The bottom plate 40 is fixedly installed at the center of the top of the frame 10 by bolts. The frame 10 is movably connected with a driving roller 41 on both sides of the bottom plate 40 through bearings. A friction belt 42 is movably connected between the outer ends of the driving roller 41 on the bottom plate 40, and the friction belt 42 moves between the outer peripheries of the two ends between the driving roller 41 and the bottom plate 40. The friction belt 42 can drive the woven bag to be transported on the bottom plate 40. The frame 10 is provided with a fixed side plate 20 fixedly installed at the center of both ends of the top side by bolts, a fixed rod 21 is fixedly installed between the fixed side plates 20 by bolts, a support plate 23 with a friction roller 22 is fixedly installed between the fixed rods 21 by bolts, an organic board 11 is fixedly installed at the center of the top side of the frame 10 by bolts, a sewing machine body 12 for sewing the bottom of the woven bag is fixedly installed at the center of the top side of the machine board 11 by bolts, and the bottom of the woven bag is overlapped and sewn, and a positioning component for positioning the woven bag is provided in the fixed box 30, and the positioning component includes:

[0033] A positioning suction hole 43 for sewing the woven bag, a plurality of positioning suction holes 43 are evenly opened on the bottom side of the sewing machine body 12 on the bottom plate 40, the bottom of the positioning suction hole 43 extends through the suction seat 44 at the bottom center of the bottom plate 40, the positioning suction hole 43 is used to increase the pressure between the woven bag and the friction belt 42 during sewing, so that there will be no misalignment and wrinkles during the sewing process, a ventilation cylinder 50 is installed on the bottom side of the frame 10 through a connecting rod 58, and the bottom center of the suction seat 44 is connected to the outer side of one end of the ventilation cylinder 50 through a first conduit 51;

[0034] An air outlet connection seat 52 for positioning the woven bag after it falls off is fixed on one end of the top of the frame 10 by bolts. The center of one side of the air outlet connection seat 52 is connected to the outer side of one end of the ventilator 50 through a second conduit 53. The air outlet connection seat 52 is used to blow the falling woven bag to prevent the woven bag from sticking to the frame 10 due to static electricity.

[0035] A swing shaft 31 for sewing the bottom of the woven bags is connected to the swing shaft 31 on one side of the bottom of the frame 10 through a bearing. The swing shaft 31 drives the swing rod 35 to swing the woven bags, so that the sewn woven bags can be concentrated and stacked. One end of the swing shaft 31 passes through the bearing and extends into the fixed box 30, and a rotating gear 32 is fixedly installed on the swing shaft 31 in the fixed box 30 by bolts. A hydraulic telescopic rod 33 is fixedly installed at one end of the fixed box 30 by bolts. A rack plate 34 meshing with the rotating gear 32 is fixedly installed on the top of the hydraulic telescopic rod 33 by bolts. The rack plate 34 cooperates with the rotating gear 32 to achieve intermittent swinging of the swing shaft 31 and the effect of air intake positioning adsorption and air outlet woven bag separation.

[0036] See also Figure 2 , Figure 3 and Figure 6 A support plate 23 is fixedly installed between the two ends of the fixing rod 21 by bolts, and a plurality of connecting plates 24 are fixedly installed on one side of the support plate 23 by bolts. One end of the support plate 23 is connected to a friction roller 22 through a rotating shaft on the bottom of the connecting plate 24, and the other end of the support plate 23 is connected to a limiting roller 25 through a rotating shaft on the bottom of the connecting plate 24. For stable discharge of the woven bag after the bottom is sewn, a rotating roller 26 is arranged on the bottom of the connecting plate 24 between the friction roller 22 and the limiting roller 25 on the support plate 23, and the support plates 23 are all located on the top side of the friction belt 42.

[0037] A driving frame 14 with a driving motor 13 is fixedly installed on one side of the bottom of the frame 10 by bolts, one end of the transmission roller 41 passes through the bearing on the frame 10 and is connected to a driven pulley 15, the output end of the driving motor 13 is connected to a driving pulley 16 through a rotating shaft, and a transmission belt ring 17 is tensionedly connected between the driving pulley 16 and the driven pulley 15.

[0038] See also Figure 1 , Figure 2 and Figure 4 A spiral curling cylinder 45 for curling one end of the bottom of the woven bag is fixedly installed on the top of the frame 10 on one side of the machine plate 11 by bolts, a spiral plate 46 is fixedly installed on the bottom plate 40 in the interior of the spiral curling cylinder 45 by bolts, and a square-structured pressing plate 47 is fixedly installed on the end of the spiral curling cylinder 45 close to the sewing machine body 12 by bolts to achieve overlapping curling of one end of the woven bag, and then to achieve pressing and sewing.

[0039] The swing shaft 31 moves on the bottom side of the limiting roller 25, and a plurality of swing rods 35 for swinging the woven bags to fall off are evenly installed on the top side of the swing shaft 31, and the air outlet connection seat 52 is arranged on the top side of the swing rod 35. An emergency button 18 is fixedly installed on the top side of the frame 10 by bolts to achieve an emergency stop effect, and a controller 19 for controlling the hydraulic telescopic rod 33 and the drive motor 13 is fixedly installed on the other side of the top of the frame 10 by bolts to achieve the bottom sewing of woven bags of different specifications.

[0040] See also Figure 2 , Figure 4 , Figure 5 , Figure 7 and Figure 8 A T-shaped groove 36 is provided at the center of one side of the top of the fixed box 30, and a T-shaped slider 37 is slidably connected to the fixed box 30 in the T-shaped groove 36. The top center of the rack plate 34 is fixedly installed on the bottom end of the T-shaped slider 37 by bolts, so that the rack plate 34 can move back and forth stably. A movable plate 54 is fixedly installed on the outer side of one end of the rack plate 34 by bolts, and a piston plate 55 is movably provided inside the ventilation cylinder 50. A piston rod 56 is fixedly installed at the center of one side of the piston plate 55 by bolts, and one end of the piston rod 56 is connected to the center of one side of the movable plate 54 through the end, so as to realize the suction and exhaust of the ventilation cylinder 50.

[0041] A movable groove 38 that matches the size of the movable plate 54 is opened on one side of the fixed box 30, and the movable plate 54 moves through the movable groove 38. A movable hole 39 that matches the size of the rack plate 34 is opened at the top center of one end of the fixed box 30, and the rack plate 34 moves in the movable hole 39 and moves through it, with a simple and stable structure.

[0042] See also Figure 5 , Figure 7 and Figure 8 A mounting rod 60 is fixedly installed on the frame 10 at the bottom of one end of the sewing machine body 12 by bolts, and an operating table 61 is fixedly installed between the top of the mounting rod 60 and the frame 10 by bolts. A one-way valve 57 is provided on the first duct 51 and the second duct 53. The first duct 51 can only take air into the ventilation cylinder 50, and the second duct 53 can only let air out of the ventilation cylinder 50. A support frame 62 with a bobbin is fixedly installed on the top of the machine plate 11 at both ends of one side of the sewing machine body 12 by bolts, and the sewing head of the sewing machine body 12 is arranged at the center of one side of the pressure plate 47.

[0043] Working principle: Place the neatly stacked woven bags on the operating table 61, and the operator holds one end of the bottom of the woven bag and puts it into the spiral curling cylinder 45. At the same time, the woven bag and the friction belt 42 are against each other. The friction belt 42 cooperates with the friction roller 22 and the rotating roller 26 under the support plate 23 to transport the woven bag on the top of the bottom plate 40. At the same time, during the transportation process, one end of the woven bag cooperates with the spiral plate 46 in the spiral curling cylinder 45 to fold and curl one end. The woven bag with overlapping curling edges is sewn under the sewing machine body 12 to achieve a stable sewing effect on the bottom of the woven bag.

[0044] When the woven bag is being sewn, the suction seat 44 under the bottom plate 40 sucks air through the positioning suction hole 43, so that the woven bag is well fitted with the bottom plate 40 and the friction belt 42 during sewing, and no dislocation or wrinkles will occur during sewing. The hydraulic telescopic rod 33 in the fixed box 30 is retracted to drive the rack plate 34 to move toward one end of the hydraulic telescopic rod 33. The rack plate 34 drives the piston plate 55 in the air exchange cylinder 50 to move through the movable plate 54 and the movable groove 38. The piston plate 55 forms a negative pressure in the air exchange cylinder 50, and sucks air through the positioning suction hole 43 through the first conduit 51 to achieve sewing. At the same time, the rack plate 34 drives the swing shaft 31 on the rotating gear 32 to move, so that the swing shaft 31 and the swing rod 35 enter a vertical state.

[0045] When the suction action cooperates with the woven bag to complete the bottom seam, the woven bag enters under the limiting roller 25 through the friction belt 42, and then leans on one side of the swing rod 35. At this time, the hydraulic telescopic rod 33 resets and extends. The hydraulic telescopic rod 33 similarly flips and swings the swing shaft 31 and the swing rod 35 through the rack plate 34 and the rotating gear 32, and drives the woven bag under the limiting roller 25 from the vertical state to the horizontal state, so that the woven bag can be stacked together at the bottom of the seam, and the structure is stable. At the same time, the hydraulic telescopic rod 33 uses the movable plate 54 and the movable groove 38 to discharge the gas in the ventilation cylinder 50 during the pushing process, and the discharged gas cylinder enters the air outlet connection seat 52 through the second conduit 53. The air outlet connection seat 52 inflates the woven bag and the friction belt 42 to separate it, so as to avoid the woven bag from being stuck on the frame 10 due to static electricity adsorption. The design is ingenious.

[0046] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited thereto, and various changes can be made within the knowledge scope of technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A woven bag bottom sewing device, comprising a frame (10), fixed side panels (20) arranged on both sides of the top of the frame (10), a bottom plate (40) arranged at the center of the top of the frame (10), and a fixed box (30) installed on one side of the bottom of the frame (10), characterized in that: The bottom plate (40) is fixedly mounted at the center of the top of the frame (10) by means of bolts, a transmission roller (41) is movably connected to the frame (10) on both sides of the bottom plate (40) by means of bearings, a friction belt (42) is movably connected between the outer ends of the transmission roller (41) on the bottom plate (40), and the friction belt (42) moves around the outer periphery of both ends between the transmission roller (41) and the bottom plate (40), and the fixed side plate (20) is fixedly mounted at the center of both ends of one side of the top of the frame (10) by means of bolts. ), a fixing rod (21) is fixedly installed between the fixed side plates (20) by bolts, a support plate (23) with a friction roller (22) is fixedly installed between the fixing rods (21) by bolts, an organic board (11) is fixedly installed at the center of one side of the top of the frame (10) by bolts, a sewing machine body (12) for sewing the bottom of the woven bag is fixedly installed at the center of one side of the top of the machine board (11) by bolts, and a positioning component for positioning the woven bag is provided in the fixed box (30), and the positioning component includes: A positioning suction hole (43) for sewing a woven bag, wherein a plurality of the positioning suction holes (43) are evenly arranged on the bottom side of the sewing machine body (12) on the bottom plate (40), the bottom of each positioning suction hole (43) extends through a suction seat (44) at the bottom center of the bottom plate (40), a ventilation cylinder (50) is installed at the bottom side of the frame (10) via a connecting rod (58), and the bottom center of the suction seat (44) is connected to the outer side of one end of the ventilation cylinder (50) via a first conduit (51); An air outlet connection seat (52) for positioning the woven bag after it is dropped off, wherein the air outlet connection seat (52) with a plurality of air jets is fixedly mounted on one end of the top of the frame (10) by means of bolts, and the center of one side of the air outlet connection seat (52) is connected to the outer side of one end of the ventilation cylinder (50) by means of a second conduit (53); A swing shaft (31) for sewing the bottom of a woven bag is provided. The swing shaft (31) is connected to one side of the bottom of the frame (10) via a bearing. One end of the swing shaft (31) passes through the bearing and extends into the fixed box (30). A rotating gear (32) is fixedly installed on the swing shaft (31) in the fixed box (30) via bolts. A hydraulic telescopic rod (33) is fixedly installed at one end of the fixed box (30) via bolts. A rack plate (34) meshing with the rotating gear (32) is fixedly installed at the top of the hydraulic telescopic rod (33) via bolts.

2. A woven bag bottom sewing device according to claim 1, characterized in that: The support plate (23) is fixedly installed between the two ends of the fixing rod (21) by bolts, and a plurality of connecting plates (24) are fixedly installed on one side of the support plate (23) by bolts, one end of the support plate (23) is connected to the friction roller (22) at the bottom of the connecting plate (24) by a rotating shaft, and the other end of the support plate (23) is connected to the limiting roller (25) at the bottom of the connecting plate (24) by a rotating shaft, and a rotating roller (26) is arranged at the bottom of the connecting plate (24) between the friction roller (22) and the limiting roller (25) on the support plate (23), and the support plates (23) are all located on the top side of the friction belt (42).

3. A woven bag bottom sewing device according to claim 2, characterized in that: A driving frame (14) with a driving motor (13) is fixedly mounted on one side of the bottom of the frame (10) by bolts; one end of the driving roller (41) passes through a bearing on the frame (10) and is connected to a driven pulley (15); the output end of the driving motor (13) is connected to a driving pulley (16) via a rotating shaft; a driving belt ring (17) is tensionedly connected between the driving pulley (16) and the driven pulley (15).

4. A woven bag bottom sewing device according to claim 1, characterized in that: A spiral curling cylinder (45) for curling one end of the bottom of the woven bag is fixedly installed on the top of the frame (10) by bolts on one side of the machine plate (11); a spiral plate (46) is fixedly installed on the bottom plate (40) in the interior of the spiral curling cylinder (45) by bolts; and a square-structured edge holding plate (47) is fixedly installed on the end of the spiral curling cylinder (45) close to the sewing machine body (12) by bolts.

5. The woven bag bottom sewing device according to claim 3, characterized in that: The swing shaft (31) moves on the bottom side of the limiting roller (25), and a plurality of swing rods (35) for swinging the woven bag are evenly installed on the top side of the swing shaft (31), and the air outlet connection seat (52) is arranged on the top side of the swing rod (35). An emergency button (18) is fixedly installed on the top side of the frame (10) by bolts, and a controller (19) for controlling the hydraulic telescopic rod (33) and the drive motor (13) is fixedly installed on the other side of the top of the frame (10) by bolts.

6. A woven bag bottom sewing device according to claim 1, characterized in that: A T-shaped slide groove (36) is provided at the center of one side of the top of the fixed box (30), and a T-shaped slider (37) is slidably connected to the fixed box (30) in the T-shaped slide groove (36). The top center of the rack plate (34) is fixedly mounted on the bottom end of the T-shaped slider (37) by bolts, and a movable plate (54) is fixedly mounted on the outer side of one end of the rack plate (34) by bolts. A piston plate (55) is movably arranged inside the air exchange cylinder (50), and a piston rod (56) is fixedly mounted at the center of one side of the piston plate (55) by bolts, and one end of the piston rod (56) is connected to the center of one side of the movable plate (54) through the top center.

7. A woven bag bottom sewing device according to claim 6, characterized in that: A movable groove (38) having a size matching that of the movable plate (54) is provided on one side of the fixed box (30), and the movable plate (54) is movable and passes through the movable groove (38). A movable hole (39) having a size matching that of the rack plate (34) is provided at the center of the top of one end of the fixed box (30), and the rack plate (34) is movable in the movable hole (39).

8. The woven bag bottom sewing device according to claim 4, characterized in that: A mounting rod (60) is fixedly mounted on the frame (10) at the bottom of one end of the sewing machine body (12) by means of bolts, an operating table (61) is fixedly mounted between the top end of the mounting rod (60) and the frame (10) by means of bolts, one-way valves (57) are provided on both the first conduit (51) and the second conduit (53), a support frame (62) with a bobbin is fixedly mounted on the top of the machine plate (11) at both ends of one side of the sewing machine body (12) by means of bolts, and a sewing head of the sewing machine body (12) is arranged at the center of one side of a pressure plate (47).

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