Double-pulley auxiliary conveying structure of waistline setting machine

Abstract

The utility model belongs to the technical field of the upper waist machine relates to a double tow wheel auxiliary conveying structure of upper waist machine, including sewing machine, the work table below sewing machine head is provided with the cloth tow wheel mechanism and cloth pressing tow wheel mechanism of auxiliary conveying, be provided with the cutting knife mechanism that cuts off cloth between cloth tow wheel mechanism and cloth pressing tow wheel mechanism, cloth tow wheel mechanism, cutting knife mechanism and cloth pressing tow wheel mechanism all are located the rear side of sewing machine presser foot and distribute in proper order along the conveying direction of cloth, cloth tow wheel mechanism and cloth pressing tow wheel mechanism are driven by power device and move down respectively. The double tow wheel auxiliary conveying structure of upper waist machine provided by the utility model can make cloth sewing more even, prevent cloth rebound or shift in the moment of cutting.

Description

Technical Field

[0001] This utility model belongs to the technical field of waist-lifting machines, and relates to a double-tug wheel auxiliary conveying structure for waist-lifting machines. Background Technology

[0002] Waistband sewing machines are specialized sewing equipment used in garment processing. They are mainly used to precisely sew waistbands and other waist components of trousers and skirts to the waistband of the garment. Through automated or semi-automatic feeding and presser foot assistance, they ensure that the waistband fits the garment body smoothly and the stitching is even, greatly improving the efficiency and precision of the waistband sewing process. They are widely used in the mass production of trousers, skirts and other garments with waistbands.

[0003] To improve the automation level of waistband sewing machines, Chinese utility model patent CN205917437U (publication date: 2017-02-01) discloses a trouser waistband sewing machine, including a sewing head and an operating table. A feed nozzle is hinged to one side of the operating table, and the nozzle consists of a feed sleeve, a guide plate, and a guide wire. A pressure roller is installed at the other end of the sewing head. This waistband sewing machine can complete the sewing of the trouser waistband in one go, simplifying the processing flow.

[0004] Existing waist-sealing machines are equipped with a pressure roller to assist in feeding during the sewing process. However, for thicker denim fabrics, the pressure of this structure is insufficient to completely suppress the elastic shrinkage and interlayer slippage of the fabric. In addition, during the automation of waist-sealing machines, the cutting mechanism is also integrated into the fabric feeding process. However, at the moment the cutting mechanism cuts the fabric, the finished part retracts or shifts due to loss of traction, which cannot guarantee the neatness of the cut and the continuity of the process. Utility Model Content

[0005] This invention addresses the shortcomings of existing technologies by providing a double-roller auxiliary conveying structure for a sewing machine, which can make fabric sewing smoother and prevent fabric from springing back or shifting at the moment of cutting.

[0006] To solve the above-mentioned technical problems, the objective of this utility model is achieved through the following technical solution: A double-roller auxiliary conveying structure for a sewing machine includes a sewing machine. An auxiliary conveying fabric feeding roller mechanism and a fabric pressing roller mechanism are arranged on the worktable below the sewing machine head. A fabric cutting mechanism is arranged between the fabric feeding roller mechanism and the fabric pressing roller mechanism. The fabric feeding roller mechanism, the cutting mechanism, and the fabric pressing roller mechanism are all located behind the sewing machine presser foot and are distributed sequentially along the fabric conveying direction. The fabric feeding roller mechanism and the fabric pressing roller mechanism are driven downward by a power device.

[0007] In the above-mentioned double-roller auxiliary conveying structure of a waist-lengthening machine, the fabric feeding roller mechanism includes a fabric feeding roller and a fabric feeding roller drive cylinder. A fabric feeding roller mounting seat is provided on the rear side of the machine head. The fabric feeding roller drive cylinder is mounted on the fabric feeding roller mounting seat and is connected to the fabric feeding roller in a driving connection. Furthermore, the fabric feeding roller mounting seat is integrally formed on the machine head. The fabric feeding roller drive cylinder is vertically mounted on the top of the fabric feeding roller mounting seat through a threaded connection or other means. The end of its piston rod is connected to a sliding block on a guide shaft. The fabric feeding roller is mounted below the sliding block.

[0008] In the above-mentioned double-roller auxiliary conveying structure of the waist-lifting machine, a front fixed wheel is provided below the fabric-feeding roller, and a roller through hole is provided on the worktable for the front fixed wheel to be exposed. After the fabric-feeding roller moves downward, it conveys the fabric together with the front fixed wheel.

[0009] In the above-mentioned double-roller auxiliary conveying structure of a waist-lifting machine, the fabric-pressing roller mechanism includes a fabric-pressing roller and a fabric-pressing roller drive cylinder. A rearwardly extending fabric-pressing roller mounting seat is provided on the rear side of the machine head. The fabric-pressing roller drive cylinder is mounted on the fabric-pressing roller mounting seat and is connected to the fabric-pressing roller in a driving connection. Further, the fabric-pressing roller mounting seat is a rearwardly extending cantilever beam structure. One end of the seat is fixed to the machine head by fasteners, and the other end is a suspended end used to install the fabric-pressing roller drive cylinder. The fabric-pressing roller drive cylinder is vertically mounted at the bottom of the fabric-pressing roller mounting seat. The piston rod of the fabric-pressing roller drive cylinder is connected to the fabric-pressing roller connecting plate, and the fabric-pressing roller is connected to the fabric-pressing roller connecting plate.

[0010] In the above-mentioned double-roller auxiliary conveying structure of the waist-lifting machine, a rear fixed wheel is provided below the pressing roller. Both the pressing roller and the rear fixed wheel are located on the outside of the worktable. After the pressing roller moves downward, it clamps the fabric together with the rear fixed wheel.

[0011] In the above-mentioned double-roller auxiliary conveying structure of a waist-lifting machine, the cutting mechanism includes a fixed blade disposed below the worktable and a movable blade disposed above the worktable. The worktable is provided with a cutting through hole for the movable blade to cut. The movable blade has a V-shaped structure, with its middle part hinged inside the worktable, its tail end connected to the cutting blade drive cylinder, and its head end forming a movable cutting end.

[0012] In the above-mentioned double-roller auxiliary conveying structure of the waist-raising machine, the moving blade is clearance-fitted with its hinge shaft, and a cutter clamping cylinder is provided on one side of the moving blade. The cutter clamping cylinder is connected to the moving blade and drives the moving blade to move axially to eliminate the gap between it and the fixed blade. The hinge shaft of the moving blade includes a hinge shaft between its middle part and the worktable and a hinge shaft between its tail end and the cutter drive cylinder.

[0013] Compared with the prior art, this utility model has the following advantages: This invention provides a double-roller auxiliary conveying structure for a waist-slimming machine, improving the fabric feeding and pressing structure. A fabric feeding roller mechanism and a fabric pressing roller mechanism are respectively installed on the front and rear sides of the cutting mechanism. Through this double-roller layout, this invention not only better achieves the function of pressing and conveying the fabric, making the sewing smoother, but also achieves precise tension isolation and control between the "sewing zone" and the "cutting zone." Before and during the cutting action, it can continue to firmly press down the already sewn finished part, preventing the fabric from springing back or shifting at the moment of cutting. Attached Figure Description

[0014] Figure 1 This is a perspective view of the present invention; Figure 2 This is a perspective view of a portion of the drive structure of this utility model; Reference numerals: 1. Machine head; 2. Workbench; 3. Fabric feeding roller mechanism; 31. Fabric feeding roller; 32. Fabric feeding roller drive cylinder; 33. Fabric feeding roller mounting base; 34. Front fixed wheel; 4. Fabric pressing roller mechanism; 41. Fabric pressing roller; 42. Fabric pressing roller drive cylinder; 43. Fabric pressing roller mounting base; 44. Rear fixed wheel; 5. Cutting mechanism; 51. Fixed blade; 52. Moving blade; 53. Cutting blade drive cylinder; 54. Cutting blade clamping cylinder; 6. Presser foot. Detailed Implementation

[0015] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. Figure 1-2 : A double-roller auxiliary conveying structure for a sewing machine includes the sewing machine itself. A feed roller mechanism 3 and a press roller mechanism 4 are provided on the worktable 2 below the sewing machine head 1. A fabric cutting mechanism 5 is located between the feed roller mechanism 3 and the press roller mechanism 4. The feed roller mechanism 3, the cutter mechanism 5, and the press roller mechanism 4 are all located behind the sewing machine presser foot 6 and are distributed sequentially along the fabric conveying direction. The feed roller mechanism 3 and the press roller mechanism 4 are each driven downwards by a power unit. Specifically: Fabric feeding roller mechanism 3: includes a fabric feeding roller 31 and a fabric feeding roller drive cylinder 32. A fabric feeding roller 31 mounting seat is provided on the rear side of the machine head 1. The fabric feeding roller drive cylinder 32 is mounted on the fabric feeding roller 31 mounting seat and is connected to the fabric feeding roller 31 in a transmission connection. In this embodiment, the fabric feeding roller 31 mounting seat is integrally formed on the machine head 1. The fabric feeding roller drive cylinder 32 is vertically mounted on the top of the fabric feeding roller 31 mounting seat by means of threaded engagement or other means. The end of its piston rod is connected to a slider that can slide along a vertical guide axis. The fabric feeding roller 31 is mounted below the slider by a shaft or bearing.

[0016] Preferably, in this embodiment, a front fixed wheel 34 is provided below the fabric feeding trolley 31, and a trolley through hole is provided on the worktable 2 for the front fixed wheel 34 to be exposed. After the fabric feeding trolley 31 moves downward, it together with the front fixed wheel 34 to transport the fabric.

[0017] The cutting mechanism 5 is driven by a power device to cut the fabric. The cutting mechanism 5 includes a fixed blade 51 located below the worktable 2 and a movable blade 52 located above the worktable 2. The worktable 2 is provided with a cutting through hole for the movable blade 52 to cut. The movable blade 52 has a V-shaped structure, with its middle part hinged in the worktable 2, its tail end connected to the cutting drive cylinder 53, and its head end forming a movable cutting end.

[0018] In this embodiment, preferably, the moving blade 52 is clearance-fitted with its hinge shaft. A cutter clamping cylinder 54 is provided on one side of the moving blade 52. The cutter clamping cylinder 54 is drively connected to the moving blade 52 and drives the moving blade 52 to move axially to eliminate the gap between it and the fixed blade, ensuring concentrated shearing force and a clean cut. The hinge shaft of the moving blade 52 includes a hinge shaft between its middle part and the worktable 2 and a hinge shaft between its tail end and the cutter drive cylinder 53. During operation, the cutter drive cylinder 53 and the cutter clamping cylinder 54 operate synchronously to complete the cutting action.

[0019] Fabric pressing roller mechanism 4: includes fabric pressing roller 41 and fabric pressing roller drive cylinder 42. A fabric pressing roller mounting seat 43 extending rearward is provided on the rear side of the machine head 1. The fabric pressing roller drive cylinder 42 is mounted on the fabric pressing roller mounting seat 43 and is connected to the fabric pressing roller 41 in a transmission manner. In this embodiment, the fabric pressing roller mounting seat 43 is a cantilever beam structure extending horizontally rearward. One end of it is fixed to the machine head 1 by fasteners, and the other end is a suspended end used to install the fabric pressing roller drive cylinder 42. The fabric pressing roller drive cylinder 42 is vertically mounted at the bottom of the fabric pressing roller mounting seat 43. The piston rod of the fabric pressing roller drive cylinder 42 is connected to the fabric pressing roller connecting plate. The fabric pressing roller 41 is connected to the fabric pressing roller connecting plate. Preferably, the circumferential surface of the fabric pressing roller 41 is provided with axial concave and convex stripes to increase friction.

[0020] Preferably, in this embodiment, a rear fixed wheel 44 is provided below the pressing roller 41. Both the pressing roller 41 and the rear fixed wheel 44 are located on the outside of the workbench 2. After the pressing roller 41 moves downward, it clamps the fabric together with the rear fixed wheel 44. Since both the pressing roller 41 and the rear fixed wheel 44 are located on the outside of the workbench 2, when the fabric is cut, the finished fabric released by releasing the pressing roller 41 can fall directly into the collection device outside the workbench 2.

[0021] During operation, the feeding mechanism conveys the main fabric (body), outer fabric (waistband), and bottom fabric (waistband hem) to the sewing area. The feed roller drive cylinder 32 actuates, causing the feed roller 31 to press down synchronously with the presser foot 6, pulling the fabric forward. Before cutting, the pressure roller drive cylinder 42 actuates, causing the pressure roller 41 to move downwards and press the fabric. When the cutting point reaches the location of the cutting mechanism 5, the cutting blade drive cylinder 53 drives the moving blade 52 to rotate downwards, cooperating with the fixed blade 51 to neatly cut the fabric. After cutting, the cutting mechanism 5 resets, and the pressure roller 41, driven by the pressure roller drive cylinder 42, lifts up, releasing the fabric. The feed roller 31, driven by the feed roller drive cylinder 32, resets with the presser foot 6. This completes one sewing cycle.

[0022] The above embodiments are merely preferred embodiments of the present utility model and are not intended to limit the scope of protection of the present utility model. Therefore, all equivalent changes made to the structure, shape, and principle of the present utility model should be covered within the scope of protection of the present utility model.

Claims

1. A double-roller auxiliary conveying structure for a sewing machine, comprising a sewing machine, characterized in that, The workbench (2) below the sewing machine head (1) is equipped with an auxiliary conveying feed roller mechanism (3) and a press roller mechanism (4). A cutting mechanism (5) for cutting the fabric is provided between the feed roller mechanism (3) and the press roller mechanism (4). The feed roller mechanism (3), the cutting mechanism (5) and the press roller mechanism (4) are all located behind the sewing machine presser foot (6) and are distributed in sequence along the conveying direction of the fabric. The feed roller mechanism (3) and the press roller mechanism (4) are driven to move downward by a power device.

2. The double-roller auxiliary conveying structure of the upper waist machine according to claim 1, characterized in that, The fabric feeding trolley mechanism (3) includes a fabric feeding trolley (31) and a fabric feeding trolley drive cylinder (32). A fabric feeding trolley mounting seat (33) is provided on the rear side of the machine head (1). The fabric feeding trolley drive cylinder (32) is mounted on the fabric feeding trolley mounting seat (33) and is connected to the fabric feeding trolley (31) in a transmission connection.

3. The double-roller auxiliary conveying structure of the upper waist machine according to claim 2, characterized in that, The fabric feeding trolley (31) is provided with a front fixed wheel (34) below it. The worktable (2) is provided with a trolley through hole for the front fixed wheel (34) to be exposed. After the fabric feeding trolley (31) moves downward, it together with the front fixed wheel (34) to transport the fabric.

4. The double-roller auxiliary conveying structure of the waist-lifting machine according to claim 1, characterized in that, The pressing roller mechanism (4) includes a pressing roller (41) and a pressing roller drive cylinder (42). A pressing roller mounting seat (43) extending backward is provided on the rear side of the machine head (1). The pressing roller drive cylinder (42) is mounted on the pressing roller mounting seat (43) and is connected to the pressing roller (41) in a transmission manner.

5. The double-roller auxiliary conveying structure of the waist-lifting machine according to claim 4, characterized in that, The pressing roller (41) is provided with a rear fixed roller (44) below it. Both the pressing roller (41) and the rear fixed roller (44) are located on the outside of the workbench (2). After the pressing roller (41) moves downward, it clamps the fabric together with the rear fixed roller (44).

6. The double-roller auxiliary conveying structure of the waist-lifting machine according to claim 1, characterized in that, The cutting mechanism (5) includes a fixed blade (51) located below the worktable (2) and a movable blade (52) located above the worktable (2). The worktable (2) is provided with a cutting through hole for the movable blade (52) to cut. The movable blade (52) has a V-shaped structure, with its middle part hinged in the worktable (2), its tail end connected to the cutting drive cylinder (53), and its head end forming a movable cutting end.

7. The double-roller auxiliary conveying structure of the waist-lifting machine according to claim 6, characterized in that, The moving blade (52) is clearance-fitted with its hinge shaft. A cutting blade clamping cylinder (54) is provided on one side of the moving blade (52). The cutting blade clamping cylinder (54) is connected to the moving blade (52) and drives the moving blade (52) to move axially to eliminate the gap between it and the fixed blade (51).

Images