Trousers-loop machine and method of operation thereof

Abstract

The application discloses a pants loop machine, which comprises a workbench device and a sewing machine head. The machine further comprises a feeding mechanism, a material taking assembly and a hemming mechanism. The feeding mechanism comprises a feeding mounting base, a feeding conveying mechanism and a shearing mechanism. The feeding mounting base is arranged on the frame in a front-rear sliding mode. The feeding conveying mechanism actively feeds the pants loop belt. The shearing mechanism cuts the pants loop belt. The material taking mounting base is fixedly arranged on the workbench plate. A jaw driving mechanism is arranged on the material taking mounting base, the jaw driving mechanism drives the material taking jaw assembly to move forward and backward, and the material taking jaw assembly clamps the end of the pants loop belt. A hemmer X driving device drives the two hems to move left and right. A hemmer Y driving device drives the adjustment of the distance between the fixed hem and the adjustment hem by adjusting the forward and backward movement of the hem. A hemmer Z driving device drives the two hems to move up and down. The hemmer Y driving device drives the forward and backward movement of the feeding mounting base.

Description

Technical Field

[0001] This invention relates to the field of automated processing equipment technology, specifically a trouser loop sewing machine and its working method. Background Technology

[0002] Pants loops are commonly used in lower garments such as trousers and skirts, primarily to secure the waistband. Pants loops are placed at appropriate intervals at the waistband, their color matching the trousers, and their material being the same as the trouser fabric. When using a belt, it is passed through each loop in turn, and the loops secure the belt, connecting it to the garment. Some belts serve a decorative purpose (such as those on dresses), while others tighten the lower garment at the waist to prevent it from slipping down. Pants loops need to be sewn onto the garment one by one, and the sewing efficiency of the loops affects the overall garment processing efficiency. Therefore, automatic pants loop machines have emerged on the market to improve processing efficiency. Chinese patent document CN107090671B discloses a "fully automated loop sewing machine and its control method". The loop clamping mechanism of this device includes a feeding mechanism and a clamping mechanism. The feeding mechanism includes a guide wheel, a guide platform and a rubber wheel arranged opposite each other, and a cutting assembly. The cutting assembly includes an upper cutter and a lower cutter. The material belt enters from the guide wheel, is pressed by the rubber wheel via the guide platform, and is continuously fed. After the material belt reaches a certain length, it is cut by the cutting assembly. The clamping mechanism clamps the cut material belt of a certain length and sends it to the sewing mechanism. The clamping mechanism includes a main clamping mechanism. The main clamping mechanism includes an upper clamp and a lower clamp arranged opposite each other, and also includes an upper clamping clamping assembly. The upper clamping clamping assembly is used to control the relative movement of the upper clamp and the lower clamp to clamp the material belt. The upper clamping assembly includes a bullet head connected to the push rod of the straight drive assembly, a hollow support sleeve fitted with the bullet head and having an open slot at the top, a guide block adapted to the shape of the front end of the hollow support sleeve and having an installation slot at the front end, and a guide movable block inserted into the installation slot of the guide block; it also includes a force transmission block, which includes a first included angle arm and a second included angle arm. The first included angle arm is installed at the top of the hollow support sleeve, the guide block, and the guide movable block, and is locked in the open slot at the top of the hollow support sleeve and the guide block. The second included angle arm is located inside the hollow support sleeve and connects to the bullet head. The first included angle arm and the second included angle arm form an obtuse angle; the guide movable block is connected to the upper clamp and drives the upper clamp to move. A spring is provided between the upper clamp and the lower clamp. This machine first sews the first thread, then the main clamping mechanism clamps the fabric strip again. The left and right presser feet of the sewing mechanism move upwards to release the fabric strip, the main clamping mechanism rotates the fabric strip 360 degrees, and the left and right presser feet of the sewing mechanism press the fabric strip downwards. The main clamping mechanism then releases and returns to its initial position. This shows that the machine head has only one set of presser feet, which is inefficient and prone to positional deviation during the 360-degree rotation, affecting quality and appearance. Secondly, the distance between the main clamping mechanism and the auxiliary clamping mechanism is fixed, while different garments require different trouser loop sizes. This structure can only be used for sewing single-size trouser loops. Different sizes of trouser loops require separate equipment, significantly increasing the company's equipment investment and costs.To improve efficiency, some sewing machines are equipped with two needles and two sets of presser feet for simultaneous sewing. For example, Chinese patent document CN201065466Y discloses an automatic stitching machine. This structure has two presser feet, and the distance between the presser feet can be adjusted, which improves adaptability. When the sewing machine is used, both sides of the trouser loop are sewn at the same time, which greatly improves efficiency. However, the feeding mechanism of this structure is relatively troublesome to adjust and has low precision control capability. Summary of the Invention

[0003] The purpose of this invention is to provide a simple, easily adjustable trouser loop machine and its working method that can adapt to the hemming requirements of trouser loops of different lengths.

[0004] The basic technical solution for achieving the objective of this invention is: a trouser loop sewing machine, comprising a worktable assembly and a sewing head. The worktable assembly includes a frame, a worktable plate, and a worktable lifting mechanism. The worktable plate is fixedly mounted on the frame via the worktable lifting mechanism. The sewing head is a double-needle sewing head, and the distance between the two presser feet of the sewing head is adjustable. Its structural features include: a feeding mechanism, a material handling assembly, and a hemming mechanism.

[0005] The feeding mechanism includes a feeding mounting base, a feeding conveyor, and a shearing mechanism. The feeding mounting base is slidably mounted on the frame in a back-to-back direction. The feeding conveyor actively feeds the trouser straps. The shearing mechanism cuts the trouser straps off. The picking assembly includes a picking mounting base, a picking gripper assembly, and a gripper drive mechanism. The picking mounting base is fixedly mounted on the worktable. The gripper drive mechanism is mounted on the picking mounting base and drives the picking gripper assembly to move back and forth, gripping the end of the trouser strap.

[0006] The hemming mechanism includes hemming units, an X-axis drive unit, a Z-axis drive unit, and a Y-axis drive unit. The hemming units consist of a fixed hemming unit and an adjustable hemming unit. The X-axis drive unit drives both hemming units to move left and right. The Y-axis drive unit drives the adjustable hemming unit to move back and forth to adjust the distance between the fixed and adjustable hemming units. The Z-axis drive unit drives both hemming units to move up and down. The Y-axis drive unit drives the feeding mounting base to move back and forth.

[0007] Furthermore, to improve the hemming accuracy and adapt to different trouser strap thicknesses, the two hemming machines have the same structure, both including a hemming clamp assembly, a clamping seat, and a clamping rotation drive device.

[0008] The edge-rolling clamp assembly includes a fixed clamping rod, a movable clamping rod, and an edge-rolling clamp base. The edge-rolling clamp base is rotatably mounted on the clamp base, and a clamping rotation drive device drives the edge-rolling clamp base to rotate. The clamping rotation drive device is fixedly mounted on the clamp base. The fixed clamping rod is fixedly mounted on the edge-rolling clamp base and coaxial with the rotation axis of the edge-rolling clamp base. The movable clamping rod is fixedly mounted on the edge-rolling clamp base and parallel to the fixed clamping rod; the distance between the movable clamping rod and the fixed clamping rod is adjustable.

[0009] Furthermore, to improve the accuracy of the edge-curling feeding process, the edge-curling device also includes an auxiliary clamping plate and an auxiliary clamping drive device. The auxiliary clamping plate is rotatably mounted on the material clamping seat, with its rotation axis perpendicular to the rotation axis of the edge-curling material clamping seat. The left end of the auxiliary clamping plate is located above the fixed clamping rod. The auxiliary clamping drive device drives the right end of the auxiliary clamping plate to move up and down, thereby causing the left end of the auxiliary clamping plate to lift upwards or press downwards onto the fixed clamping rod.

[0010] Furthermore, to achieve synchronous movement and adjustment in the X, Y, and Z directions, the edge curler X-direction drive device includes an edge curler X-direction motor, an edge curler X-direction first mounting base, an edge curler X-direction second mounting base, and an edge curler X-direction guide assembly. The edge curler X-direction guide assembly includes two linear guides arranged parallel to each other. One linear guide is fixedly mounted on the worktable along its left-right direction, and the other linear guide is fixedly mounted on the feeding mounting base along its left-right direction. The edge curler X-direction first mounting base is fixedly mounted on the slider of the linear guide on the worktable. The edge curler X-direction motor is fixedly mounted on the worktable, and drives the edge curler X-direction first mounting base to move in the X direction along the edge curler X-direction guide assembly via corresponding synchronous pulleys and synchronous belt assemblies. The edge curler X-direction second mounting base is fixedly mounted on the slider of the linear guide on the feeding mounting base.

[0011] The edge curler Y-axis drive device includes an edge curler Y-axis drive motor, an edge curler Y-axis lead screw and nut pair, an edge curler Y-axis guide assembly, an adjustable edge curler guide assembly, and an adjustable edge curler synchronous guide shaft. The edge curler Y-axis drive motor drives the feeding mounting base to move along the edge curler Y-axis guide assembly in the Y direction via the edge curler Y-axis lead screw and nut pair.

[0012] The adjusting hemming device guide assembly includes two linear guides. One linear guide is fixedly mounted on a first mounting base in the X direction of the hemming device along its front-to-back direction, and its slider is fixedly mounted on a second mounting base in the X direction of the hemming device. The other linear guide is fixedly mounted on a material clamping seat of the adjusting hemming device along its front-to-back direction, and its slider is fixedly mounted on a material clamping seat of the fixed hemming device. The adjusting hemming device synchronous guide shaft is fixedly mounted on the adjusting hemming device along the Y direction and slidably mounted on the fixed hemming device.

[0013] The Z-axis driving device for the hemming machine includes a first Z-axis driving cylinder and a second Z-axis driving cylinder. The first Z-axis driving cylinder is fixedly mounted on a first X-axis mounting base of the hemming machine by the lower end of its cylinder rod. The second Z-axis driving cylinder is fixedly connected above the cylinder body of the first Z-axis driving cylinder by its cylinder body. The cylinder rod of the second Z-axis driving cylinder extends upwards and is arranged parallel to the cylinder rod of the first Z-axis driving cylinder. The first and second Z-axis driving cylinders drive the hemming machine to move in the Z-direction.

[0014] Furthermore, in order to improve the feeding accuracy, active feeding is adopted. The feeding and conveying mechanism includes a feeding drive motor, a feeding roller, a feeding roller transmission assembly, a feeding pressure roller, a pressure roller transmission assembly, a feeding pressure roller seat, a pressure roller seat drive cylinder, and a feeding platform.

[0015] The feeding platform is fixedly mounted on the feeding mounting base. The feeding drive motor is fixedly mounted on the feeding mounting base. The feeding roller is rotatably mounted in the feeding platform, with its highest point above the upper surface of the feeding platform. The feeding roller is driven to rotate by the feeding drive motor through the feeding roller transmission assembly. The feeding pressure roller is rotatably mounted on the feeding pressure roller seat. The feeding pressure roller is driven to rotate by the feeding drive motor through the pressure roller transmission assembly. The feeding pressure roller rotates in opposite directions to the feeding roller. The feeding pressure roller is located above the feeding roller. A pressure roller seat drive cylinder drives the feeding pressure roller seat to rotate, thereby causing the feeding pressure roller to move closer to or further away from the feeding roller.

[0016] Furthermore, to ensure feeding accuracy and smooth continuous feeding, the feeding mechanism also includes a guiding mechanism. The guiding mechanism includes a first guide plate, a second guide plate, and an upper guide limiting plate. The first guide plate is fixedly mounted on the feeding platform in the front-to-back direction, with its corresponding part located above the feeding roller and avoiding it. The second guide plate is fixedly mounted on the feeding platform in the front-to-back direction, located to the right of the first guide plate. Its corresponding part extends to the right, bypassing the feeding roller, and extends to the rear of the feeding roller, thus forming a belt loop channel between the first and second guide plates. The distance between the feeding roller, the feeding pressure roller, and the second guide plate is adjustable to accommodate belt loops of different widths. The upper guide limiting plate is fixedly mounted on the front of the first and second guide plates in the left-to-right direction, thereby sealing off the upper front of the belt loop channel and limiting the belt loop upwards to prevent it from slipping out of the channel.

[0017] Furthermore, to ensure continuous feeding over extended periods and reduce the number of times the loops need to be threaded, the feeding mechanism also includes a joint detection mechanism. This joint detection mechanism is used to detect the joints where two loops connect.

[0018] Specifically, the joint detection mechanism includes a trouser loop pressure plate, a detection sensor, a tension spring, a detection adjustment seat, and a pressure plate seat locking handwheel.

[0019] The lower part of the detection adjustment seat is rotatably mounted on the feeding mounting seat, with its rotation axis along the Y direction. The upper part of the detection adjustment seat cooperates with the locking handwheel of the pressure plate seat, clamping and fixing it on the feeding mounting seat. The corresponding part of the screw of the locking handwheel of the pressure plate seat is located in the corresponding arc-shaped groove on the feeding mounting seat, thereby locking and fixing the upper part of the feeding mounting seat on the feeding mounting seat through the locking handwheel of the pressure plate seat. The loop pressure plate is rotatably mounted on the detection adjustment seat, coaxial with the rotation axis of the lower part of the pressure plate seat. The rear end of the loop pressure plate is located in the rear part of the loop belt channel, and behind the feeding roller and the feeding pressure roller. One end of the tension spring is fixedly connected to the detection adjustment seat, and the other end is connected to the upper front part of the loop pressure plate, thereby causing the rear part of the loop pressure plate to move downward and contact the upper surface of the loop belt below. The detection sensor is fixedly mounted on the detection adjustment seat in the front-rear direction, with its front end cooperating with the upper part of the loop pressure plate.

[0020] Furthermore, to ensure the flatness of the trouser loops, the material handling gripper assembly includes a fixed gripper, a movable gripper, a clamping cylinder, and a gripper reset assembly. The movable gripper is rotatably mounted on the fixed gripper, and the clamping cylinder is fixedly mounted on the fixed gripper. The clamping cylinder drives the movable gripper to form a closed clamping structure with the front part of the fixed gripper. The gripper reset assembly separates the front end of the movable gripper upwards from the fixed gripper.

[0021] Furthermore, in order to cut the trouser straps, the cutting mechanism includes a cutting mount, a fixed blade, a moving blade, and a moving blade drive cylinder.

[0022] The shearing mounting base is rotatably mounted on the feeding mounting base, with its rotation axis oriented vertically. A discharge hole is located at the bottom of the shearing mounting base. A moving blade driven by a cylinder rotates the moving blade up and down, intersecting with the stationary blade to perform a shearing operation, cutting the trouser straps exiting the discharge hole.

[0023] Furthermore, to cut different shapes for the ends of the trouser loops, the cutting mechanism also includes a first angle adjusting cylinder and a second angle adjusting cylinder. The first and second angle adjusting cylinders are fixedly connected together by their respective cylinder bodies. The piston rod of the first angle adjusting cylinder extends forward and is hinged to the feeding mounting base, with its hinge axis positioned vertically. The piston rod of the second angle adjusting cylinder extends backward and is hinged to the cutting mounting base, with its hinge axis also positioned vertically.

[0024] Specifically, when the piston rod of the first angle adjusting cylinder extends and the piston rod of the second angle adjusting cylinder retracts, the fixed blade and the moving blade are perpendicular to the belt loop. Cutting is performed at this time, resulting in belt loops with straight ends. When both piston rods of the first and second angle adjusting cylinders retract, the fixed blade and the moving blade are at a certain angle to the belt loop. A first cut is performed. After this cut, the piston rods of both cylinders extend, and the fixed blade and the moving blade turn to the other side, forming an angle with the belt loop. A second cut is then performed. After both cuts, the ends of the belt loop are triangular.

[0025] Furthermore, for easier material handling, the shearing mechanism also includes a pallet and a pallet drive cylinder. A pallet drive unit is located on the lower left side of the moving blade.

[0026] The pallet drive cylinder is a single-acting spring-return cylinder, with the spring pushing the piston rod upward. The pallet slides vertically on the pallet drive cylinder, its front side contacting the rear side of the fixed blade, located below the moving blade. The pallet is driven by the piston rod of the pallet drive cylinder. A downward pressing part is provided on the left side of the pallet, cooperating with the pallet drive section of the moving blade.

[0027] Furthermore, to improve the precision of the hemming and ensure accurate positioning, an auxiliary positioning mechanism is also included. This auxiliary positioning mechanism comprises a lower material support mechanism and an upper material pressing mechanism. The lower material support mechanism works in conjunction with the upper material pressing mechanism to clamp and fix the corresponding parts of the trouser loops.

[0028] There are two material lowering mechanisms, designated as a front lowering mechanism and a rear lowering mechanism based on their relative positions. Both mechanisms have identical structures, including a material lowering drive cylinder and a material lowering seat. The material lowering drive cylinder drives the material lowering seat to move up and down. The distance between the front and rear lowering mechanisms is adjustable.

[0029] There are two upper pressing mechanisms, designated as a front upper pressing mechanism and a rear upper pressing mechanism based on their relative positions. Both mechanisms have identical structures, including an upper pressing head and a pressing head drive cylinder, which drives the upper pressing head to move up and down. The distance between the front and rear upper pressing mechanisms is adjustable.

[0030] The upper pressure head of the front upper pressing mechanism cooperates with the material support seat of the front lower supporting mechanism to clamp the corresponding part of the trouser strap. The upper pressure head of the rear upper pressing mechanism cooperates with the material support seat of the rear lower supporting mechanism to clamp the corresponding part of the trouser strap.

[0031] Furthermore, to ensure the straightness of the trouser loops in the Y direction, the upper pressing mechanism also includes limiting rods. There are two limiting rods, which are fixedly mounted on the upper pressing head in the left-right direction, and the distance between the two limiting rods can be adjusted.

[0032] Furthermore, to facilitate the insertion of the belt after sewing, the auxiliary positioning mechanism also includes a redundancy mechanism. The redundancy mechanism includes a redundancy pressure rod and a pressure rod drive cylinder. The pressure rod drive cylinder drives the redundancy pressure rod to move up and down.

[0033] A method for operating a trouser loop machine includes the following steps:

[0034] Step 1: Adjust the distance between the two hemming devices. Adjust the distance between the front and rear lower material support mechanisms. Adjust the distance between the front and rear upper material pressing mechanisms. Adjust the distance between the moving clamping rod and the fixed clamping rod to be 0.5 to 2 mm greater than the thickest part of the trouser strap, according to the thickness of the trouser strap. Adjust the position of the detection sensor according to the thickness of the trouser strap.

[0035] Step 2: Thread the corresponding portion of the rolled-up trouser loops into the guiding mechanism and the feeding conveyor of the feeding mechanism.

[0036] Step 3: The material handling component clamps the rear end of the belt loop, then pulls the belt loop backward, while the feeding mechanism simultaneously conveys the belt loop backward.

[0037] Furthermore, the auxiliary positioning mechanism clamps and positions the loop belt between the material handling component and the feeding mechanism. The material support mounting seat of the lower material support mechanism rises to the lower side of the loop belt, supporting the loop belt from below, and then the upper pressure head, together with the material support mounting seat, clamps and fixes the loop belt downwards.

[0038] Step 4: While the material taking component pulls the trouser loop backward, the hemming mechanism moves to the right from its initial state to the rightmost end. After the hemming device has completely moved to the right from below the trouser loop, the cylinder rod of the second drive cylinder of the hemming device Z-direction drive unit of the hemming mechanism also extends, so that the distance between the rotation axis of the hemming material clamping seat and the upper surface of the feeding table is greater than the radius of the fixed clamping rod by 0.3 to 1 mm.

[0039] The cylinder rod of the auxiliary clamping drive device retracts downwards, and the auxiliary clamping reset device pulls the right end of the auxiliary clamping plate downwards, thereby raising the left end of the auxiliary clamping plate upwards and away from the fixed clamping rod. Then, the fixed clamping device and the adjusting clamping device's clamping material holder rotate upwards and towards each other 270 degrees until the moving clamping rod is above the fixed clamping rod. The X-axis drive device of the clamping device drives the clamping device to move to the left along the X-axis until the corresponding part of the trouser loop is located between the fixed clamping rod and the moving clamping rod of the clamping material clamping assembly of the clamping device.

[0040] Then, the material handling assembly loosens the rear end of the belt loop, and the shearing mechanism cuts the belt loop. After cutting, the feeding roller and feeding pressure roller of the feeding conveyor mechanism clamp the belt loop and convey it backward a certain distance. Next, the fixed edge rolling device and the edge rolling clamp of the adjusting edge rolling device rotate downward and towards each other by 270 degrees, so that the two ends of the cut belt loop are rolled downward to a relative state. Then, the cylinder rod of the auxiliary clamping drive device extends upward and pushes the right end of the auxiliary clamping plate upward, thereby pressing the left end of the auxiliary clamping plate downward, clamping and fixing the corresponding part of the belt loop together with the fixed clamping rod. The lower material support mechanism of the auxiliary positioning mechanism descends, and the upper pressure head of the upper pressure mechanism rises.

[0041] Step 5: The worker first places the main body fabric on the needle plate of the sewing machine head. The hemming device retracts downwards via the Z-axis of the second drive cylinder. Then, the hemming device's X-axis drive mechanism drives the hemming device to move to the left along the X-axis until it is below the two presser feet of the sewing machine head. Next, the hemming device retracts downwards via the Z-axis of the first drive cylinder, causing the hemming device to continue descending, thus placing the hemmed trouser loop on the main body fabric on the needle plate of the sewing machine head. Then, the presser feet of the sewing machine head press down first to fix the trouser loop. After the trouser loop is fixed, the hemming device's X-axis drive mechanism drives the hemming device to move to the right along the X-axis back to the initial position. When the hemming device leaves the trouser loop, the presser feet of the sewing machine head press down a second time to press and fix the trouser loop tightly on the needle plate, and then sewing begins.

[0042] As the edge curler X resets, the material handling assembly performs the next material handling operation.

[0043] Furthermore, to facilitate the wearing of the belt after sewing, step three also includes the following steps:

[0044] Before the upper pressure head clamps the loop together with the material support mounting seat, the redundant pressure bar descends. At this time, the feeding conveyor actively delivers the excess portion of the loop belt, and the redundant pressure bar arches the corresponding part of the loop belt from above, making it lower than the upper surface of the feeding table, so that the loop belt leaves a little slack. Then the upper pressure head descends again and clamps the loop together with the material support mounting seat.

[0045] Step four also includes the following step: raising the redundant pressure bar.

[0046] The present invention has the following beneficial effects: (1) The trouser loop machine of the present invention has a simple structure and can adapt to trouser loops of different lengths, with strong adaptability. While adjusting the fixed hemming device and adjusting the distance of the hemming device through the Y-axis drive mechanism, the position of the feeding mechanism, the distance between the front lower material support mechanism and the rear lower material support mechanism of the auxiliary positioning mechanism, and the distance between the front upper material pressing mechanism and the rear upper material pressing mechanism can be adjusted simultaneously, and the adjustment is fast and accurate.

[0047] (2) The distance between the moving clamping rod and the fixed clamping rod of the hemming machine of the present invention can be adjusted, so as to adapt to trouser straps of different thicknesses, which is beneficial to improving the hemming accuracy. The hemming machine is also equipped with an auxiliary clamping plate to ensure that the position remains unchanged during the transportation process after hemming, which further improves the accuracy of the position during sewing.

[0048] (3) Existing trouser loop machines only have two positions for the hemming device: rising (above the needle plate) and falling (falling down onto the fabric of the needle plate). The material taking component can only pick up the material after the hemming device has moved to the other side, which is inefficient. The hemming device Z-direction drive device of the trouser loop machine of the present invention includes a first Z-direction drive cylinder and a second Z-direction drive cylinder for the hemming device. This increases the rising material taking position, so that when the hemming device is in the initial position, it is lower than the feeding table. When the material taking component picks up the material, the hemming device can pass under the trouser loop tape on the material taking component, thereby reducing the waiting time and improving efficiency.

[0049] (4) The feeding mechanism of the trouser loop machine of the present invention adopts active feeding, which is accurate. The feeding pressure roller seat can be lifted to facilitate the threading of the trouser loop straps. In order to reduce the number of times the trouser loop straps are threaded and improve efficiency, multiple long trouser loop straps can be sewn together first. The sewn joint needs to be cut off before the material taking component takes the material. The feeding mechanism is equipped with a joint detection mechanism, which can detect the joint and then cut it by the shearing mechanism, thereby helping to ensure subsequent quality and avoiding the joint being taken away by the material taking component and then sewn onto the body fabric.

[0050] (5) The cutting mechanism of the trouser loop machine of the present invention is provided with a first angle adjusting cylinder and a second angle adjusting cylinder, so as to change the angle during cutting and cut out different shapes of trouser loop ends to meet diverse needs.

[0051] (6) The feeding mechanism of the trouser loop machine of the present invention is provided with a tray plate, which can support the trouser loop belt above it and prevent the trouser loop belt from drooping. When the fixed claw and movable claw of the material picking component come forward to pick up and clamp the material, the tray plate descends, which helps to improve the accuracy and success rate of the material picking component.

[0052] (7) The trouser loop machine of the present invention is provided with an auxiliary positioning mechanism to ensure accurate positioning of the hemming mechanism before hemming, thereby improving the accuracy of subsequent hemming.

[0053] (8) The trouser loop machine of the present invention is provided with a redundant position mechanism. The redundant position mechanism enables the actual length of the middle part of the trouser loop to be greater than the distance between the two ends of the sewn part after the trouser loop is sewn onto the body fabric. This facilitates the wearing of the waist belt and ensures that there will be no stretching or deformation after the waist belt is worn, making it more flat and beautiful when worn.

[0054] (9) The working method of the trouser loop machine of the present invention is conducive to improving production efficiency. When the hemming device finishes feeding and the sewing machine head is reset, the material taking component can take the material again. Since the hemming device is equipped with a Z-direction drive device, the height of the hemming device can be lowered and it passes under the trouser loop belt. Therefore, it is not necessary to wait until the hemming device has completely run to the other side of the material taking component before the material taking component can take the material, as in the prior art. This greatly improves the working efficiency. Attached Figure Description

[0055] Figure 1 This is a schematic diagram of the trouser loop machine of the present invention.

[0056] Figure 2 From Figure 1 A diagram showing the view from the upper left front.

[0057] Figure 3 From Figure 1 A diagram showing the view from the upper right rear.

[0058] Figure 4 From Figure 1 A schematic diagram of the feeding mechanism, the edge-rolling mechanism, and the auxiliary positioning mechanism when viewed from the upper left rear.

[0059] Figure 5 From Figure 1 A schematic diagram of the feeding mechanism, edge-rolling mechanism, and auxiliary positioning mechanism when viewed from the lower right rear.

[0060] Figure 6 From Figure 1 A schematic diagram of the feeding mechanism when viewed from behind.

[0061] Figure 7 From Figure 1 A schematic diagram of the feeding mechanism when viewed from the left.

[0062] Figure 8 From Figure 1 A schematic diagram of the feeding mechanism when viewed from the upper left front.

[0063] Figure 9 From Figure 1 A schematic diagram of the feeding and conveying mechanism when viewed from the upper left rear.

[0064] Figure 10 From Figure 1 A schematic diagram of the material handling component when viewed from the upper left front.

[0065] Figure 11 From Figure 1 A schematic diagram of the material handling component when viewed from the lower right rear.

[0066] Figure 12 From Figure 1A schematic diagram of the hemming mechanism when viewed from the upper right front.

[0067] Figure 13 From Figure 1 A schematic diagram of the hemming mechanism when viewed from the lower left rear.

[0068] Figure 14 From Figure 1 A schematic diagram of the crimping assembly when viewed from above.

[0069] Figure 15 From Figure 1 A schematic diagram of the curling iron assembly when viewed from the upper left front.

[0070] Figure 16 From Figure 1 A schematic diagram of the curling iron assembly when viewed from the lower left rear.

[0071] Figure 17 This is a schematic diagram of the structure of the hemming machine.

[0072] Figure 18 From Figure 1 A schematic diagram of the auxiliary positioning mechanism when viewed from the upper left front.

[0073] Figure 19 From Figure 1 A schematic diagram of the auxiliary positioning mechanism when viewed from the lower left rear.

[0074] Figure 20 The shape of the trouser loops cut when the fixed and moving blades of the shearing mechanism are perpendicular to the trouser loops.

[0075] Figure 21 The shape of the trouser loops cut when the fixed and moving blades of the shearing mechanism are at a certain angle (not perpendicular) to the trouser loops.

[0076] The labels in the attached diagram are:

[0077] Workbench assembly 1, machine frame 11, workbench plate 12, table lifting mechanism 13, sewing machine head 2.

[0078] Feeding mechanism 3, feeding mounting base 3-1, feeding conveying mechanism 3-2, feeding drive motor 3-21, feeding roller 3-22, feeding roller transmission assembly 3-23, feeding pressure roller 3-24, pressure roller transmission assembly 3-25, feeding pressure roller seat 3-26, pressure roller seat drive cylinder 3-27, feeding platform 3-28, guiding mechanism 3-3, first guide plate 3-31, second guide plate 3-32, trouser loop belt channel 3-33, upper guide limit plate 3-34, joint detection machine Components 3-4, trouser loop pressure plate 3-41, detection sensor 3-42, tension spring 3-43, detection adjustment seat 3-44, pressure plate seat locking handwheel 3-45, shearing mechanism 3-5, shearing mounting seat 3-51, fixed blade 3-52, moving blade 3-53, pallet drive unit 3-531, moving blade drive cylinder 3-54, pallet 3-55, pressing unit 3-551, pallet drive cylinder 3-56, first angle adjustment cylinder 3-57, second angle adjustment cylinder 3-58.

[0079] Material handling assembly 4, material handling mounting base 4-1, material handling gripper assembly 4-2, fixed gripper 4-21, movable gripper 4-22, clamping cylinder 4-23, first pin 4-24, second pin 4-25, first tension spring 4-26, gripper drive mechanism 4-3, gripper drive motor 4-31, synchronous belt drive mechanism 4-32, gripper seat 4-33, first linear guide rail 4-34.

[0080] Hemming mechanism 5, hemming device 51, fixed hemming device 51b, adjustable hemming device 51a, hemming material clamping assembly 51-1, fixed clamping rod 51-11, movable clamping rod 51-12, hemming material clamping seat 51-13, clamping seat 51-2, clamping rotation drive device 51-3, auxiliary clamping plate 51-4, auxiliary clamping drive device 51-5, auxiliary clamping reset device 51-6, hemming device X-direction drive device 52, hemming device X-direction motor 52-1, hemming device X-direction first mounting seat 52-2, hemming device X-direction second... Mounting base 52-3, hemming machine X-direction guide assembly 52-4, hemming machine Y-direction drive device 53, hemming machine Y-direction drive motor 53-1, hemming machine Y-direction lead screw and nut pair 53-2, hemming machine Y-direction guide assembly 53-3, adjusting hemming machine guide assembly 53-4, adjusting hemming machine synchronous guide shaft 53-5, hemming machine Z-direction drive device 54, hemming machine Z-direction first drive cylinder 54-1, hemming machine Z-direction second drive cylinder 54-2, hemming machine Z-direction limit post 54-3, hemming machine Z-direction guide assembly 54-4.

[0081] Auxiliary positioning mechanism 6, lower material support mechanism 61, front lower material support mechanism 61a, rear lower material support mechanism 61b, material support mounting base 61-1, material support drive cylinder 61-2, material support linear guide rail 61-3, material support seat 61-4, upper pressing mechanism 62, front upper pressing mechanism 62a, rear upper pressing mechanism 62b, upper pressing head 62-1, limit rod 62-2, pressing head mounting base 62-3, pressing head drive cylinder 62-4, pressing head guide assembly 62-5, redundant positioning mechanism 63, redundant positioning pressure rod 63-1, pressure rod drive cylinder 63-2, pressure rod linear guide rail 63-3, pressure rod seat 63-4, and trouser loop belt 10. Detailed Implementation

[0082] To make the content of this invention easier to understand, the invention will be further described in detail below with reference to specific embodiments and accompanying drawings. The orientation of the invention is described according to... Figure 1 Proceeding in the indicated direction, that is Figure 1 The up, down, left, and right directions shown are the same as the directions described. Figure 1 The direction one faces is the front, and the direction one turns away from is the back. Figure 1 The side that is in front is the rear. Figure 1 The left and right directions are the X direction. Figure 1 The forward and backward direction is the Y-axis. Figure 1 The vertical direction is Z-axis. It should be understood that the terms "upper," "lower," "inner," and "outer," etc., indicate orientation or positional relationships based on the positional relationships shown in the accompanying drawings, and are only for the convenience of describing the invention or simplifying the description, not to indicate a specific orientation that must be present. Furthermore, in the description of the invention, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0083] (Example 1)

[0084] See Figures 1 to 19 The trouser loop machine of the present invention includes a worktable device 1, a sewing head 2, a feeding mechanism 3, a material taking component 4, a hemming mechanism 5, and an auxiliary positioning mechanism 6. See [link / description]. Figures 1 to 3 The workbench device 1 adopts the existing workbench structure and includes a frame 11, a workbench 12, and a workbench lifting mechanism 13. The workbench 12 is fixedly mounted on the frame 11 through the workbench lifting mechanism 13, and the height of the workbench 12 can be adjusted through the workbench lifting mechanism 13 to accommodate operators of different heights.

[0085] See Figures 1 to 3 The sewing head 2 adopts the sewing head technology in the prior art. The sewing head 2 is a double needle sewing head. The distance between the two presser feet of the sewing head 2 can be adjusted to meet the sewing needs of trouser loops of different sizes.

[0086] See Figures 1 to 9 The feeding mechanism 3 includes a feeding mounting base 3-1, a feeding conveying mechanism 3-2, a guiding mechanism 3-3, a joint detection mechanism 3-4, and a shearing mechanism 3-5. The feeding conveying mechanism 3-2 conveys the trouser loops along the guiding mechanism 3-3, which limits the trouser loops in the left-right direction. The joint detection mechanism 3-4 detects the joints where two trouser loops 10 are connected. The material taking component 4 pulls out the rolled trouser loops 10 for the hemming mechanism 5 to take and hem. The shearing mechanism 3-5 cuts the trouser loops 10 of the appropriate length from the rolled trouser loops 10. The feeding mounting base 3-1 is slidably mounted on the frame 11 in the front-back direction.

[0087] The feeding and conveying mechanism 3-2 includes a feeding drive motor 3-21, a feeding roller 3-22, a feeding roller transmission assembly 3-23, a feeding pressure roller 3-24, a pressure roller transmission assembly 3-25, a feeding pressure roller seat 3-26, a pressure roller seat drive cylinder 3-27, and a feeding platform 3-28. The feeding platform 3-28 is fixedly mounted on the feeding mounting base 3-1. The feeding drive motor 3-21 of the fixed gripper 4-21 of the picking gripper assembly 4-2 is fixedly mounted on the feeding mounting base 3-1. The feeding roller 3-22 is rotatably mounted in the feeding platform 3-28, with its highest point higher than the upper surface of the feeding platform 3-28. The feeding roller 3-22 is driven to rotate by the feeding drive motor 3-21 through the feeding roller transmission assembly 3-23, which uses a gear transmission. The feeding roller 3-24 is rotatably mounted on the feeding roller seat 3-26. It is driven to rotate by the feeding drive motor 3-21 via the roller transmission assembly 3-25. The feeding roller 3-23 rotates in opposite directions to the feeding roller 3-22. The feeding roller 3-23 is located above the feeding roller 3-22. The roller transmission assembly 3-25 includes a first synchronous pulley, a second synchronous pulley, and a roller synchronous belt. The first synchronous pulley is driven by the motor shaft of the feeding drive motor 3-21, and the second synchronous pulley is driven by the rotating shaft of the feeding roller 3-24. The roller synchronous belt surrounds the first and second synchronous pulleys. The feeding roller seat 3-24 is rotatably mounted on the feeding platform 3-28, and its rotation axis is coaxial with the first synchronous pulley. The pressure roller seat drive cylinder 3-27 is hinged to the feeding mounting base 3-1 by its cylinder body. The end of its cylinder rod is connected to the feeding pressure roller seat 3-26 through a fisheye joint. Thus, the pressure roller seat drive cylinder 3-27 drives the feeding pressure roller seat 3-26 to rotate, thereby causing the feeding pressure roller 3-24 to move closer to or further away from the feeding roller 3-22.

[0088] The material guiding mechanism 3-3 includes a first guide plate 3-31, a second guide plate 3-32, and an upper guide limiting plate 3-34. The first guide plate 3-31 is fixedly mounted on the feeding platform 3-28 in the front-to-back direction, with its corresponding portion located above and away from the feeding roller 3-22. The second guide plate 3-32 is fixedly mounted on the feeding platform 3-28 in the front-to-back direction, located to the right of the first guide plate 3-31. Its corresponding portion extends to the right, bypassing the feeding roller 3-22, and then extends to the rear of the feeding roller 3-22, thus forming a loop belt channel 3-33 between the first guide plate 3-31 and the second guide plate 3-32. The corresponding portions of the feeding roller 3-22 and the feeding pressure roller 3-24 are located within the loop belt channel 3-33. The distance between the first guide plate 3-31 and the second guide plate 3-32 is adjustable to accommodate loop belts of different widths. The upper guide limiting plate 3-34 is fixedly installed in the left-right direction on the front part of the first guide plate 3-31 and the second guide plate 3-32, thereby sealing the upper front part of the belt loop channel 3-33 and limiting the belt loop upward to prevent it from slipping out of the belt loop channel 3-33. The picking gripper assembly 4-2 is located behind the belt loop channel 3-33, and the upper surface of the fixing gripper 4-21 of the picking gripper assembly 4-2 is flush with the upper surface of the feeding table 3-28.

[0089] The joint detection mechanism 3-4 includes a loop pressure plate 3-41, a detection sensor 3-42, a tension spring 3-43, a detection adjustment seat 3-44, and a pressure plate seat locking handwheel 3-45. The lower part of the detection adjustment seat 3-44 is rotatably mounted on the feeding mounting seat 3-1, with its rotation axis along the Y direction. The upper part of the detection adjustment seat 3-44 cooperates with the pressure plate seat locking handwheel 3-45, clamping and fixing it onto the feeding mounting seat 3-1. The corresponding part of the screw of the pressure plate seat locking handwheel 3-45 is located in the corresponding arc-shaped groove on the feeding mounting seat 3-1, thereby locking and fixing the upper part of the feeding mounting seat 3-1 onto the feeding mounting seat 3-1 via the pressure plate seat locking handwheel 3-45. The loop pressure plate 3-41 is rotatably mounted on the detection adjustment seat 3-44, coaxially arranged with the rotation axis of the lower part of the detection adjustment seat 3-44. The rear end of the loop pressure plate 3-41 is located in the rear part of the loop belt channel 3-33, and behind the feeding roller 3-22 and the feeding pressure roller 3-24. One end of the tension spring 3-43 is fixedly connected to the detection adjustment seat 3-44, and the other end is connected to the upper front part of the loop pressure plate 3-41, so that the rear part of the loop pressure plate 3-41 moves downward and contacts the upper surface of the loop belt 10 below. The detection sensor 3-42 is fixedly mounted on the detection adjustment seat 3-44 in the front-back direction. Its front end cooperates with the upper part of the trouser loop pressure plate 3-41. When the joint of the two trouser loop straps (the thickness of the joint of the two trouser loop straps is greater than the thickness of the trouser loop straps) passes under the trouser loop pressure plate 3-41, the rear part of the trouser loop pressure plate 3-41 is pushed upward, so that the upper part of the trouser loop pressure plate 3-41 moves away from the detection sensor 3-42. The detection sensor 3-42 detects that the upper part of the trouser loop pressure plate 3-41 moves away from the detection sensor 3-42, thus determining that this is the joint of the two trouser loop straps 10.

[0090] See Figures 6 to 8 , Figure 20 and Figure 21The shearing mechanism 3-5 includes a shearing mounting base 3-51, a fixed blade 3-52, a moving blade 3-53, a moving blade drive cylinder 3-54, a support plate 3-55, a support plate drive cylinder 3-56, a first angle adjustment cylinder 3-57, and a second angle adjustment cylinder 3-58. The shearing mounting base 3-51 is rotatably mounted on the feeding mounting base 3-1, with its rotation axis oriented vertically. A discharge hole 3-511 is provided at the lower part of the shearing mounting base 3-51. The rear ends of the first guide plate 3-31 and the second guide plate 3-32 extend into the discharge hole 3-511. The fixed blade 3-52 is fixedly mounted on the rear side of the shearing mounting base 3-51, located below and behind the discharge hole 3-511. The moving blade 3-53 is slidably mounted on the shearing mounting base 3-51, located above and behind the discharge hole 3-511. The moving blade 3-53 moves downwards, intersecting with the fixed blade 3-52 to perform a shearing operation, cutting the trouser loop tape exiting the discharge hole 3-511. The moving blade drive cylinder 3-54 is fixedly mounted on the shearing mounting base 3-51 by its cylinder body. Its cylinder rod is connected to the moving blade 3-53, driving the moving blade 3-53 to move up and down. A support plate drive unit 3-531 is located on the lower left side of the moving blade 3-53. The support plate drive cylinder 3-56 is a single-acting spring-reset cylinder; the spring in the support plate drive cylinder 3-56 pushes the piston rod upwards. The support plate 3-55 is slidably mounted on the support plate drive cylinder 3-56, with its front side contacting the rear side of the fixed blade 3-52, located below the moving blade 3-53. The support plate 3-55 is connected to the piston rod of the support plate drive cylinder 3-56. A pressing part 3-551 is provided on the left side of the support plate 3-55, which cooperates with the support plate drive part 3-531 of the moving blade 3-53. When the moving blade 3-53 moves downward to cut the trouser loop, the support plate drive part 3-531 of the moving blade 3-53 first contacts the pressing part 3-551 of the support plate 3-55, and then pushes the support plate 3-55 downward to prevent the blade of the moving blade 3-53 from colliding with the support plate 3-55. When the moving blade 3-53 returns to its original position, the spring of the support plate drive cylinder 3-56 pushes the piston rod upward, thereby driving the support plate 3-55 to move upward and return to its original position until the upper surface of the support plate 3-55 is flush with the upper surface of the fixed blade 3-52. The first angle adjusting cylinder 3-57 and the second angle adjusting cylinder 3-58 are fixedly connected together by their respective cylinder bodies. The piston rod of the first angle adjusting cylinder 3-57 extends forward and is hinged to the feeding mounting base 3-1, with its hinge axis arranged vertically. The piston rod of the second angle adjusting cylinder 3-58 extends backward and is hinged to the shearing mounting base 3-51, with its hinge axis arranged vertically. Thus, the first angle adjusting cylinder 3-57 and the second angle adjusting cylinder 3-58 drive the shearing mounting base 3-51 to rotate to the right or left, thereby adjusting the angle between the fixed blade 3-52 and the moving blade 3-53 and the loop belt 10, cutting out the corresponding shape on the loop belt (see...). Figure 20 and Figure 21 Specifically, when the piston rod of the first angle adjusting cylinder 3-57 extends and the piston rod of the second angle adjusting cylinder 3-58 retracts, the fixed blade 3-52 and the moving blade 3-53 are perpendicular to the trouser loop belt 10. Cutting is then performed at this time, and the cut trouser loop belt has straight ends (see...). Figure 20 When the piston rods of the first angle adjusting cylinder 3-57 and the second angle adjusting cylinder 3-58 retract, the fixed blade 3-52 and the moving blade 3-53 are at a certain angle (i.e., not perpendicular) to the belt loop 10. In this embodiment, this is 45 degrees. The first cut is performed. After the cut is completed, the piston rods of the first angle adjusting cylinder 3-57 and the second angle adjusting cylinder 3-58 extend. At this time, the fixed blade 3-52 and the moving blade 3-53 turn to the other side, forming a certain angle (i.e., not perpendicular) to the belt loop 10. In this embodiment, this is 45 degrees. Then, the second cut is performed. After the two cuts are completed, the cut end of the belt loop 10 is triangular (see...). Figure 21 ).

[0091] See Figure 10 and Figure 11 The material handling assembly 4 includes a material handling mounting base 4-1, a material handling gripper assembly 4-2, and a gripper drive mechanism 4-3. The material handling mounting base 4-1 is fixedly mounted on the worktable 12. See Figure 10 and Figure 11 The material gripper assembly 4-2 includes a fixed gripper 4-21, a movable gripper 4-22, a clamping cylinder 4-23, and a gripper reset assembly. The gripper reset assembly includes a first pin 4-24, a second pin 4-25, and a first tension spring 4-26. The movable gripper 4-22 is rotatably mounted on the fixed gripper 4-21, and the clamping cylinder 4-23 is fixedly mounted on the fixed gripper 4-21. The piston rod of the clamping cylinder 4-23 extends forward and abuts against the upper rear end of the movable gripper 4-22, causing the movable gripper 4-22 to rotate. This causes the front part of the movable gripper 4-22 to move downward and form a closed clamping structure with the front part of the fixed gripper 4-21, thereby clamping the end of the trouser strap. After the piston rod of the clamping cylinder 4-23 retracts, the gripper reset assembly causes the movable gripper 4-22 to rotate, thus opening the front part of the movable gripper 4-22 from the front part of the fixed gripper 4-21. The first pin 4-24 is fixedly mounted on the fixed gripper 4-21, and the second pin 4-25 is fixedly mounted on the movable gripper 4-22. The two ends of the first tension spring 4-26 are respectively mounted on the first pin 4-24 and the second pin 4-25, located above the rotation axis of the movable gripper 4-22 and perpendicular to the rotation axis of the movable gripper 4-22. Thus, when the first tension spring 4-26 causes the movable gripper 4-22 to rotate, the front end of the movable gripper 4-22 separates upward from the fixed gripper 4-21.

[0092] See Figure 10and Figure 11 The gripper drive mechanism 4-3 is mounted on the material handling mounting base 4-1. The gripper drive mechanism 4-3 includes a gripper drive motor 4-31, a synchronous belt drive mechanism 4-32, a gripper seat 4-33, and a first linear guide rail 4-34. The gripper drive motor 4-31 is fixedly mounted on the material handling mounting base 4-1. The synchronous belt drive mechanism 4-32 includes a first driving pulley, a first driven pulley, and a first synchronous belt. The first driving pulley is driven onto the motor shaft of the gripper drive motor 4-31, and the first driven pulley is rotatably mounted on the material handling mounting base 4-1. The first synchronous belt surrounds the first driving pulley and the first driven pulley. The gripper seat 4-33 is fixedly mounted on the first synchronous belt via a synchronous belt clamp. The guide rail of the first linear guide rail 4-34 is fixedly mounted on the material handling mounting base 4-1 in the front-to-back direction. The gripper seat 4-33 is fixedly mounted on the slider of the first linear guide rail 4-34. The fixed gripper 4-21 of the gripper assembly 4-2 is fixedly mounted on the gripper seat 4-33 via a cylindrical shaft. Thus, the gripper drive motor 4-31 of the gripper drive mechanism 4-3 drives the synchronous belt transmission mechanism 4-32 to move the gripper seat 4-33 back and forth along the first linear guide rail 4-34, thereby driving the gripper assembly 4-2 to move back and forth.

[0093] See Figures 12 to 17 The hemming mechanism 5 includes a hemming device 51, an X-axis driving device 52, a Z-axis driving device 53, and a Y-axis driving device 54. (See...) Figure 16 and Figure 17 There are two hemming devices 51, which are designated as a fixed hemming device 51b and an adjustable hemming device 51a according to their rear and front positions. The distance between the fixed hemming device 51b and the adjustable hemming device 51a is adjustable. The two hemming devices 51 have the same structure, each including a hemming material clamping assembly 51-1, a material clamping seat 51-2, a clamping rotation drive device 51-3, an auxiliary clamping plate 51-4, an auxiliary clamping drive device 51-5, and an auxiliary clamping reset device 51-6.

[0094] The edge-rolling clamp assembly 51-1 includes a fixed clamping rod 51-11, a movable clamping rod 51-12, and an edge-rolling clamp seat 51-13. The edge-rolling clamp seat 51-13 is rotatably mounted on the clamp seat 51-2, and the clamping rotation drive device 51-3 drives the edge-rolling clamp seat 51-13 to rotate. The clamping rotation drive device 51-3 can be a motor or a rotary cylinder; in this embodiment, the clamping rotation drive device 51-3 is a rotary cylinder. The clamping rotation drive device 51-3 is fixedly mounted on the clamp seat 51-2. The fixed clamping rod 51-11 is fixedly mounted on the hemming material clamping seat 51-13 and is coaxial with the rotation axis of the hemming material clamping seat 51-13. The movable clamping rod 51-12 is fixedly mounted on the hemming material clamping seat 51-13 and is parallel to the fixed clamping rod 51-11. The distance between the movable clamping rod 51-12 and the fixed clamping rod 51-11 is adjustable to accommodate hemming of trouser loops of different thicknesses. The auxiliary clamping plate 51-4 is rotatably mounted on the material clamping seat 51-2, and its rotation axis is perpendicular to the rotation axis of the hemming material clamping seat 51-13. The left end of the auxiliary clamping plate 51-4 is located above the fixed clamping rod 51-11. The auxiliary clamping drive device 51-5 drives the right end of the auxiliary clamping plate 51-4 to move up and down, thereby lifting the left end of the auxiliary clamping plate 51-4 upward or pressing it downward onto the fixed clamping rod 51-11. In a further preferred embodiment, the auxiliary clamping drive device 51-5 is a cylinder, which is fixedly mounted on the clamping seat 51-2, with its cylinder rod extending upward and located below the right end of the auxiliary clamping plate 51-4. The auxiliary clamping reset device 51-6 is a tension spring, with one end fixedly mounted on the right end of the auxiliary clamping plate 51-4 and the other end fixedly connected to the clamping seat 51-2, located below the right end of the auxiliary clamping plate 51-4. Pulling the right end of the auxiliary clamping plate 51-4 downward causes the right end of the auxiliary clamping plate 51-4 to press against the end of the cylinder rod of the auxiliary clamping drive device 51-5. In use, the cylinder rod of the auxiliary clamping drive device 51-5 extends upward to push the right end of the auxiliary clamping plate 51-4 upward, thereby pressing the left end of the auxiliary clamping plate 51-4 downward onto the fixed clamping rod 51-11. When the cylinder rod of the auxiliary clamping drive device 51-5 retracts downward, the auxiliary clamping reset device 51-6 pulls the right end of the auxiliary clamping plate 51-4 downward, thereby lifting the left end of the auxiliary clamping plate 51-4 upward.

[0095] The edge curler X-axis drive device 52 drives the edge curler 51 to move along the X-axis. The edge curler X-axis drive device 52 includes an edge curler X-axis motor 52-1, an edge curler X-axis first mounting base 52-2, an edge curler X-axis second mounting base 52-3, and an edge curler X-axis guide assembly 52-4. The edge curler X-axis guide assembly 52-4 includes two linear guides arranged parallel to each other. One linear guide is fixedly mounted on the worktable 12 along its left-right direction, and the other linear guide is fixedly mounted on the feeding mounting base 3-1 along its left-right direction. The edge curler X-axis first mounting base 52-2 is fixedly mounted on the slider of the linear guide located on the worktable 12. The edge curler X-axis motor 52-1 is fixedly mounted on the worktable 12. The edge curler X-axis motor 52-1 drives the edge curler X-axis first mounting base 52-2 to move in the X direction along the edge curler X-axis guide assembly 52-4 via corresponding synchronous pulleys and synchronous belt assemblies. The edge curler X-axis second mounting base 52-3 is fixedly mounted on the slider of the linear guide rail located on the feeding mounting base 3-1.

[0096] The edge curler Y-axis drive device 53 includes an edge curler Y-axis drive motor 53-1, an edge curler Y-axis lead screw and nut assembly 53-2, an edge curler Y-axis guide assembly 53-3, an adjusting edge curler guide assembly 53-4, and an adjusting edge curler synchronous guide shaft 53-5. The ball screw of the edge curler Y-axis lead screw and nut assembly 53-2 is rotatably mounted on the worktable 12 along the Y-axis, and the lead screw nut of the edge curler Y-axis lead screw and nut assembly 53-2 is fixedly mounted on the feeding mounting base 3-1 via a corresponding lead screw nut seat. The edge curler Y-axis drive motor 53-1 is fixedly mounted on the worktable 12, and drives the ball screw of the edge curler Y-axis lead screw and nut assembly 53-2 to rotate via a corresponding coupling. The edge curler Y-direction guide assembly 53-3 includes two linear guides, both arranged along the Y-direction. Each linear guide is fixedly mounted on the worktable 12, and the sliders of both linear guides are fixedly mounted on the feeding mounting base 3-1. Thus, the edge curler Y-direction drive motor 53-1 drives the feeding mounting base 3-1 to move along the edge curler Y-direction guide assembly 53-3 in the Y-direction via the edge curler Y-direction lead screw and nut pair 53-2.

[0097] The adjusting hemming device guide assembly 53-4 includes two linear guides. One linear guide is fixedly mounted on the first mounting seat 52-2 in the X direction of the hemming device along its front-to-back direction, and its slider is fixedly mounted on the second mounting seat 52-3 in the X direction of the hemming device. The other linear guide is fixedly mounted on the material clamping seat 51-2 of the adjusting hemming device 51a along its front-to-back direction, and its slider is fixedly mounted on the material clamping seat 51-2 of the fixed hemming device 51b. The adjusting hemming device synchronous guide shaft 53-5 is fixedly mounted on the adjusting hemming device 51a along the Y direction and slidably mounted on the fixed hemming device 51b.

[0098] The Z-axis driving device 54 for the hemming machine includes a first Z-axis driving cylinder 54-1, a second Z-axis driving cylinder 54-2, a Z-axis limiting post 54-3, and a Z-axis guiding assembly 54-4. The first Z-axis driving cylinder 54-1 is fixedly mounted on the first X-axis mounting seat 52-2 of the hemming machine by the lower end of its cylinder rod. The second Z-axis driving cylinder 54-2 is fixedly connected to the cylinder body of the first Z-axis driving cylinder 54-1 by its cylinder body. The cylinder rod of the second Z-axis driving cylinder 54-2 extends upward and is arranged parallel to the cylinder rod of the first Z-axis driving cylinder 54-1.

[0099] The Z-direction limiting post 54-3 of the hemming device passes vertically through the corresponding part of the material clamp seat 51-2 that fixes the hemming device 51b and is then fixedly mounted on the first X-direction mounting seat 52-2 of the hemming device, limiting the material clamp seat 51-2 in the upper Z-direction. The Z-direction guide assembly 54-4 of the hemming device includes two linear guides. One linear guide is fixed vertically on the first X-direction mounting seat 52-2 of the hemming device, and its slider is fixedly mounted on the material clamp seat 51-2 that fixes the hemming device 51b. The other linear guide is fixed vertically on the second X-direction mounting seat 52-3 of the hemming device, and its slider is fixedly mounted on the material clamp seat 51-2 that adjusts the hemming device 51a. The first Z-direction drive cylinder 54-1 and the second Z-direction drive cylinder 54-2 of the hemming device drive the two hemming devices 51 to move in the Z-direction along the hemming device Z-direction guide assembly 54-4.

[0100] See Figure 18 and Figure 19 The auxiliary positioning mechanism 6 includes a lower material support mechanism 61, an upper material pressing mechanism 62, and a redundancy positioning mechanism 63. The lower material support mechanism 61 cooperates with the upper material pressing mechanism 62 to clamp and fix the corresponding part of the trouser loop, thereby ensuring accurate positioning during hemming.

[0101] See Figure 18 and Figure 19 There are two material support mechanisms 61. The two material support mechanisms 61 are a front material support mechanism 61a and a rear material support mechanism 61b according to their front and rear positions. The two material support mechanisms 61 have the same structure, including a material support mounting base 61-1, a material support drive cylinder 61-2, a material support linear guide rail 61-3 and a material support seat 61-4.

[0102] The material support mounting base 61-1 of the front lower material support mechanism 61a is fixedly mounted on the feeding mounting base 3-1. Adjusting the position of the feeding mounting base 3-1 changes the distance between the front lower material support mechanism 61a and the rear lower material support mechanism 61b, accommodating trouser straps of different lengths. The material support mounting base 61-1 of the rear lower material support mechanism 61b is fixedly mounted on the worktable 12. The material support drive cylinder 61-2 is fixedly mounted on the material support mounting base 61-1 by its cylinder body, with its cylinder rod extending upward. The material support linear guide rail 61-3 is fixedly mounted on the material support mounting base 61-1 along its vertical direction. The material support seat 61-4 is fixedly mounted on the slider of the material support linear guide rail 61-3. The upper end of the cylinder rod of the material support drive cylinder 61-2 is fixedly connected to the material support seat 61-4, thereby driving the material support seat 61-4 to move up and down along the material support linear guide rail 61-3 by the material support drive cylinder 61-2.

[0103] See Figure 18 and Figure 19 There are two upper pressing mechanisms 62, designated as a front upper pressing mechanism 62a and a rear upper pressing mechanism 62b, depending on their front-to-back positions. Both mechanisms have identical structures, including an upper pressing head 62-1, a limiting rod 62-2, a pressing head mounting base 62-3, a pressing head drive cylinder 62-4, and a pressing head linear guide rail 62-5. The pressing head mounting base 62-3 of the front upper pressing mechanism 62a is fixedly mounted on the feeding mounting base 3-1. Adjusting the position of the feeding mounting base 3-1 changes the distance between the front and rear upper pressing mechanisms 62a and 62b, and simultaneously coordinates with the corresponding lower supporting mechanism 61 to accommodate trouser straps of different lengths. The pressing head mounting base 62-3 of the rear upper pressing mechanism 62b is fixedly mounted on the worktable 12. The pressure head linear guide 62-5 is fixedly mounted on the pressure head mounting base 62-3 along its vertical direction. The upper pressure head 62-1 is fixedly mounted on the slider of the pressure head linear guide 62-5. The pressure head drive cylinder 62-4 is fixedly mounted on the pressure head mounting base 62-3 by its cylinder body, and its cylinder rod extends downward and is fixedly connected to the upper pressure head 62-1, thereby driving the upper pressure head 62-1 to move up and down along the pressure head linear guide 62-5 by the pressure head drive cylinder 62-4. There are two limit rods 62-2, which are fixedly mounted on the upper pressure head 62-1 in a left-right direction. The distance between the two limit rods 62-2 can be adjusted to limit the movement of trouser loops of different widths. The upper pressure head 62-1 of the front upper pressing mechanism 62a cooperates with the material support seat 61-4 of the front lower supporting mechanism 61a to clamp the corresponding part of the trouser loop. The upper pressing head 62-1 of the upper pressing mechanism 62b cooperates with the material support seat 61-4 of the lower supporting mechanism 61b to clamp the corresponding part of the trouser loop.

[0104] See Figure 18 and Figure 19The redundant positioning mechanism 63 includes a redundant positioning pressure rod 63-1, a pressure rod drive cylinder 63-2, a pressure rod linear guide rail 63-3, and a pressure rod seat 63-4. The redundant positioning pressure rod 63-1 is fixedly mounted on the pressure rod seat 63-4 in the left-right direction. The pressure rod linear guide rail 63-3 is fixedly mounted on the pressure head mounting seat 62-3 in the up-down direction. The pressure rod seat 63-4 is fixedly mounted on the slider of the pressure rod linear guide rail 63-3. The pressure rod drive cylinder 63-2 is fixedly mounted on the pressure head mounting seat 62-3 by its cylinder body, and its cylinder rod extends downward and is fixedly connected to the pressure rod seat 63-4. Thus, the redundant positioning pressure rod 63-1 is driven by the pressure rod drive cylinder 63-2 to move up and down along the pressure rod linear guide rail 63-3.

[0105] The working method of the trouser loop machine of the present invention includes the following steps:

[0106] In the initial state, the hemming device 51 extends to the left, and the hemming clamp assembly 51-1 is located between the feeding mechanism 3 and the sewing head 2 (see...). Figure 1 The cylinder rod of the first Z-axis drive cylinder 54-1 of the edge curler Z-axis drive device 54 is in a downward extended state, and the cylinder rod of the second Z-axis drive cylinder 54-2 of the edge curler Z-axis is in a downward retracted state. The edge curler 51 is located below the material gripper assembly 4-2 of the material picking assembly 4.

[0107] The fixed clamping rod 51-11 and the movable clamping rod 51-12 of the fixed hemming device 51b are horizontally arranged, with the movable clamping rod 51-12 located in front of the fixed clamping rod 51-11. The fixed clamping rod 51-11 and the movable clamping rod 51-12 of the adjustable hemming device 51a are horizontally arranged, with the movable clamping rod 51-12 located behind the fixed clamping rod 51-11.

[0108] Step 1: Adjust the distance between the adjusting hem roller 51a and the fixed hem roller 51b; adjust the distance between the front lower material support mechanism 61a and the rear lower material support mechanism 61b; adjust the distance between the front upper material pressing mechanism 62a and the rear upper material pressing mechanism 62b; adjust the width of the trouser loop channel 3-33.

[0109] Specifically, the distance between the adjusting hem roller 51a and the fixed hem roller 51b is adjusted according to the length of the trouser loop 10 to be sewn. During adjustment, the feeding mounting base 3-1 is moved to the corresponding position by the hem roller Y-axis drive device 53, and the adjusting hem roller 51a moves together with the feeding mounting base 3-1; at the same time, the front lower material support mechanism 61a located on the feeding mounting base 3-1 moves together with the feeding mounting base 3-1, and the front lower material support mechanism 61a and the rear lower material support mechanism 61... The distance between b is adapted to the length of the trouser loop 10. The front upper pressing mechanism 62a located on the feeding mounting base 3-1 moves together with the feeding mounting base 3-1. The distance between the front upper pressing mechanism 62a and the rear upper pressing mechanism 62b is adapted to the length of the trouser loop 10. The distance between the first guide plate 3-31 and the second guide plate 3-32 is adjusted according to the width of the trouser loop 10 to be sewn, so that the width of the trouser loop channel 3-33 is adapted to the width of the trouser loop 10.

[0110] The distance between the movable clamping rod 51-12 and the fixed clamping rod 51-11 is adjusted according to the thickness of the loop belt 10, and is 0.5 to 2 mm greater than the thickness of the thickest part of the loop belt 10; in this embodiment, it is 1 mm. The detection adjustment seat 3-44 is rotated forward or backward according to the thickness of the loop belt 10, thereby changing the position of the detection sensor 3-42. The loop pressure plate 3-41 rotates with the change in the position of the detection sensor 3-42, so that the distance between the lower rear end of the loop pressure plate 3-41 and the upper surface of the feeding table 3-28 is equal to the thickness of the loop belt 10. When the trouser loop passes normally under the trouser loop pressure plate 3-41, the detection sensor 3-42 is off when it detects that there is no joint on the trouser loop. When a joint on the trouser loop passes under the trouser loop pressure plate 3-41, the lower rear end of the trouser loop pressure plate 3-41 is lifted, and the upper front end of the trouser loop pressure plate 3-41 moves away from the detection sensor 3-42. At this time, the detection sensor 3-42 is on, indicating that a joint has been detected on the trouser loop, and the part including the joint needs to be cut off.

[0111] Step 2: Thread the corresponding portion of the rolled-up trouser loop belt through the guiding mechanism 3-3 and the feeding conveyor mechanism 3-2 of the feeding mechanism 3. At this time, the cylinder rod of the pressure roller seat drive cylinder 3-27 of the feeding conveyor mechanism 3-2 retracts forward and upward, thereby driving the upper part of the feeding pressure roller seat 3-26 to rotate forward and upward, causing the feeding pressure roller 3-24 to move forward and upward away from the feeding roller 3-22, facilitating the passage of the trouser loop belt 10 between the feeding roller 3-22 and the feeding pressure roller 3-24.

[0112] Specifically, one end of the loop belt is first inserted through the upper guide limiting plate 3-34 of the feeding mechanism 3-3 into the loop belt channel 3-33 formed between the first guide plate 3-31 and the second guide plate 3-32, then passes between the feeding roller 3-22 and the feeding pressure roller 3-24, then passes under the loop pressure plate 3-41, and finally exits through the discharge hole 3-511 of the shearing mounting seat 3-51 of the shearing mechanism 3-5, and is located behind the fixed blade 3-52. After the loop belt 10 is threaded, the cylinder rod of the pressure roller seat drive cylinder 3-27 of the feeding conveying mechanism 3-2 extends backward and downward, thereby driving the upper part of the feeding pressure roller seat 3-26 to rotate backward and downward, so that the feeding pressure roller 3-24 moves backward and downward closer to the feeding roller 3-22, thereby pressing the loop belt 10 onto the feeding roller 3-22. At this point, the loop strap is threaded. After threading, the cutting mechanism 3-5 first cuts the loop strap 10 to the required shape. Then, the feeding roller 3-22 and the feeding pressure roller 3-24 of the feeding and conveying mechanism 3-2 clamp the loop strap 10 and convey it backward a distance, which is 5 mm in this embodiment. The support plate 3-55 supports the corresponding part of the loop strap 10 located behind the fixed blade 3-52 from below, and then waits for the material picking component 4 to pick up the material.

[0113] Step 3: The material handling component 4 clamps the rear end of the trouser loop belt 10, and then pulls the trouser loop belt 10 backward. At the same time, the feeding conveyor mechanism 3-2 of the feeding mechanism 3 conveys the trouser loop belt 10 backward.

[0114] Specifically, the material-picking gripper assembly 4-2 of the material-picking component 4 moves forward, while the pallet drive cylinder 3-56 drives the pallet 3-55 to move downward to avoid the material-picking gripper assembly 4-2. The fixed gripper 4-21 of the material-picking gripper assembly 4-2 extends forward into the pallet 3-55 and catches the corresponding part of the trouser loop belt 10 from below. Then the movable gripper 4-22 moves downward and clamps the end of the trouser loop belt with the fixed gripper 4-21. After clamping, the trouser loop belt 10 is pulled backward. At the same time, the feeding conveyor mechanism 3-2 of the feeding mechanism 3 synchronously conveys the trouser loop belt 10 backward.

[0115] Furthermore, the auxiliary positioning mechanism 6 clamps and positions the loop 10 between the material taking component 4 and the feeding mechanism 3. The material supporting mounting seat 61-1 of the lower material supporting mechanism 61 rises to the lower side of the loop 10, supporting the loop 10 from below. The limiting rod 62-2 of the upper pressing mechanism 62 is inserted downwards on the left and right sides of the loop 10, thereby calibrating and positioning the loop in the Y direction. Then, the upper pressing head 62-1, together with the material supporting mounting seat 61-1, clamps and fixes the loop 10 downwards.

[0116] Furthermore, before the upper pressure head 62-1 clamps the loop 10 together with the material support mounting base 61-1, the redundant pressure bar 63-1 descends. At this time, the feeding conveyor mechanism 3-2 actively delivers the remaining portion of the loop belt 10, and the redundant pressure bar 63-1 presses down from above to make the corresponding part of the loop belt 10 arch downward, lower than the upper surface of the feeding platform 3-28, so that the loop belt 10 leaves a little slack. Then the upper pressure head 62-1 clamps the loop 10 together with the material support mounting base 61-1.

[0117] Step 4: While the material taking component 4 pulls the trouser loop 10 backward, the hemming device 51 of the hemming mechanism 5 moves to the rightmost end from the initial state. After the hemming device 51 has completely moved to the right from below the trouser loop 10, the cylinder rod of the second drive cylinder 54-2 of the hemming device Z-direction drive device 54 of the hemming mechanism 5 also extends, so that the distance between the rotation axis of the hemming material clamping seat 51-13 and the upper surface of the feeding table 3-28 is greater than the radius of the fixed clamping rod 51-11 by 0.3 to 1 mm, which is 0.8 mm in this embodiment.

[0118] The cylinder rod of the auxiliary clamping drive device 51-5 retracts downward, and the auxiliary clamping reset device 51-6 pulls the right end of the auxiliary clamping plate 51-4 downward, thereby raising the left end of the auxiliary clamping plate 51-4 upward and away from the fixed clamping rod 51-11. Then, the fixed clamping device 51b and the clamping material holder 51-13 of the hemming device 51 rotate upward and opposite to each other by 270 degrees, so that the moving clamping rod 51-12 is above the fixed clamping rod 51-11. The hemming device X-direction drive device 52 drives the hemming device 51 to move to the left along the X direction until the corresponding part of the trouser loop 10 is located between the fixed clamping rod 51-11 and the moving clamping rod 51-12 of the hemming material clamping assembly 51-1 of the hemming device 51. The fixed clamping device 51b is located behind the rear lower support mechanism 61b, and the adjusting clamping device 51a is located in front of the front lower support mechanism 61a.

[0119] Then, the material handling assembly 4 loosens the rear end of the trouser loop 10, and the shearing mechanism 3-5 cuts the trouser loop 10. After cutting, the feeding roller 3-22 and the feeding pressure roller 3-24 of the feeding conveying mechanism 3-2 clamp the trouser loop 10 and convey it backward a distance, which is 5 mm in this embodiment. Next, the fixed hemming device 51b and the hemming material clamping seat 51-13 of the adjusting hemming device 51a rotate downward and towards each other by 270 degrees, so that the two ends of the cut trouser loop 10 are rolled downward to a relative state. Then, the cylinder rod of the auxiliary clamping drive device 51-5 extends upward and pushes the right end of the auxiliary clamping plate 51-4 upward, thereby pressing the left end of the auxiliary clamping plate 51-4 downward, clamping and fixing the corresponding part of the trouser loop 10 with the fixed clamping rod 51-11.

[0120] Furthermore, the lower material support mechanism 61 of the auxiliary positioning mechanism 6 descends, while the limit rod 62-2 and the upper pressure head 62-1 of the upper pressure mechanism 62 rise upwards.

[0121] Furthermore, the redundant pressure bar 63-1 rises.

[0122] Step 5: The worker first places the main body fabric on the needle plate of the sewing machine head 2. The hemming device Z retracts downwards from the cylinder rod of the second drive cylinder 54-2. Then, the hemming device X drive 52 of the hemming mechanism 5 drives the hemming device 51 to move to the left along the X direction to below the two presser feet of the sewing machine head 2. Next, the hemming device Z retracts from the cylinder rod of the first drive cylinder 54-1, causing the hemming device 51 to continue to descend, thus placing the hemmed trouser loop on the main body fabric on the needle plate of the sewing machine head 2. Then, the presser foot of the sewing machine head 2 presses down first to fix the trouser loop. After the trouser loop is fixed, the hemming device X drive 52 drives the hemming device 51 to move to the right along the X direction to the initial position. When the hemming device 51 leaves the trouser loop, the presser foot of the sewing machine head 2 presses down again to press and fix the trouser loop 10 tightly on the needle plate, and then sewing begins.

[0123] While the edge curler 51 is resetting, the material picking component 4 picks up the material for the next time. During the material picking process, the edge curler 51 can start repeating step four, which helps to improve work efficiency.

[0124] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above descriptions are merely specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A trouser loop sewing machine, comprising a worktable device (1) and a sewing head (2); the worktable device (1) comprises a frame (11), a worktable plate (12), and a worktable lifting mechanism (13); the worktable plate (12) is fixedly mounted on the frame (11) via the worktable lifting mechanism (13), and the sewing head (2) is a double-needle sewing head, wherein the distance between the two presser feet of the sewing head (2) is adjustable; characterized in that: It also includes a feeding mechanism (3), a material taking component (4), and a curling mechanism (5); The feeding mechanism (3) includes a feeding mounting base (3-1), a feeding conveying mechanism (3-2), and a shearing mechanism (3-5); the feeding mounting base (3-1) is slidably mounted on the frame (11) in the front-back direction; the feeding conveying mechanism (3-2) actively feeds the trouser loops; the shearing mechanism (3-5) cuts the trouser loops accordingly; the picking assembly (4) includes a picking mounting base (4-1), a picking gripper assembly (4-2), and a gripper drive mechanism (4-3); the picking mounting base (4-1) is fixedly mounted on the workbench (12); the gripper drive mechanism (4-3) is mounted on the picking mounting base (4-1), and the gripper drive mechanism (4-3) drives the picking gripper assembly (4-2) to move back and forth, and the picking gripper assembly (4-2) picks up the end of the trouser loops; The hemming mechanism (5) includes a hemming device (51), an X-axis drive device (52), a Z-axis drive device (53), and a Y-axis drive device (54). There are two hemming devices (51), namely a fixed hemming device (51b) and an adjustable hemming device (51a). The X-axis drive device (52) drives the two hemming devices (51) to move left and right. The Y-axis drive device (54) drives the adjustable hemming device (51a) to move back and forth to adjust the distance between the fixed hemming device (51b) and the adjustable hemming device (51a). The Z-axis drive device (53) drives the two hemming devices (51) to move up and down. The Y-axis drive device (54) drives the feeding mounting base (3-1) to move back and forth. The edge curling device (51) includes an edge curling clamp assembly (51-1), a clamping seat (51-2), a clamping rotation drive device (51-3), an auxiliary clamping plate (51-4), and an auxiliary clamping drive device (51-5). The edge curling clamp assembly (51-1) includes a fixed clamping rod (51-11), a movable clamping rod (51-12), and an edge curling clamping seat (51-13). The movable clamping rod (51-12) is fixedly mounted on the edge curling clamping seat (51-13), and the edge curling clamping seat (51-13) is rotatably mounted on the clamping seat (51-2). The clamping rotation drive device (51-3) drives the edge curling clamping seat (51-13) to rotate. The fixed clamping rod (51-11) is fixedly mounted on the edge-rolling material clamping seat (51-13) and is coaxial with the rotation axis of the edge-rolling material clamping seat (51-13); the auxiliary clamping plate (51-4) is rotatably mounted on the material clamping seat (51-2) and its rotation axis is perpendicular to the rotation axis of the edge-rolling material clamping seat (51-13); the left end of the auxiliary clamping plate (51-4) is located above the fixed clamping rod (51-11); the auxiliary clamping drive device (51-5) drives the right end of the auxiliary clamping plate (51-4) to move up and down, so that the left end of the auxiliary clamping plate (51-4) is lifted up or pressed down on the fixed clamping rod (51-11).

2. The trouser loop machine according to claim 1, characterized in that: The material clamping rotation drive device (51-3) is fixedly mounted on the material clamping seat (51-2); the movable clamping rod (51-12) and the fixed clamping rod (51-11) are arranged parallel to each other, and the distance between the movable clamping rod (51-12) and the fixed clamping rod (51-11) can be adjusted.

3. The trouser loop machine according to claim 1 or 2, characterized in that: The edge curler X-direction drive device (52) includes an edge curler X-direction motor (52-1), an edge curler X-direction first mounting base (52-2), an edge curler X-direction second mounting base (52-3), and an edge curler X-direction guide assembly (52-4); the edge curler X-direction guide assembly (52-4) includes two linear guide rails, which are arranged parallel to each other. One linear guide rail is fixedly mounted on the worktable (12) along the left-right direction, and the other linear guide rail is fixedly mounted on the feeding mounting base (3-1) along the left-right direction; the edge curler The first X-axis mounting seat (52-2) is fixedly mounted on the slider of the linear guide rail on the worktable (12); the X-axis motor (52-1) of the edge curler is fixedly mounted on the worktable (12), and the X-axis motor (52-1) of the edge curler drives the first X-axis mounting seat (52-2) of the edge curler to move in the X direction along the X-axis guide assembly (52-4) of the edge curler through the corresponding synchronous pulley and synchronous belt assembly; the second X-axis mounting seat (52-3) of the edge curler is fixedly mounted on the slider of the linear guide rail on the feeding mounting seat (3-1); The edge curler Y-direction drive device (53) includes an edge curler Y-direction drive motor (53-1), an edge curler Y-direction screw and nut pair (53-2), an edge curler Y-direction guide assembly (53-3), an adjustable edge curler guide assembly (53-4), and an adjustable edge curler synchronous guide shaft (53-5); the edge curler Y-direction drive motor (53-1) drives the feeding mounting base (3-1) to move in the Y direction along the edge curler Y-direction guide assembly (53-3) via the edge curler Y-direction screw and nut pair (53-2); The adjusting edge curler guide assembly (53-4) includes two linear guides. One linear guide is fixedly mounted on the first mounting seat (52-2) of the edge curler in the X direction along its guide rail, and its slider is fixedly mounted on the second mounting seat (52-3) of the edge curler in the X direction. The other linear guide is fixedly mounted on the material clamping seat (51-2) of the adjusting edge curler (51a) in the X direction along its guide rail, and its slider is fixedly mounted on the material clamping seat (51-2) of the fixed edge curler (51b). The adjusting edge curler synchronous guide shaft (53-5) is fixedly mounted on the adjusting edge curler (51a) in the Y direction and is slidably mounted on the fixed edge curler (51b). The edge-rolling device (54) includes a first edge-rolling cylinder (54-1) and a second edge-rolling cylinder (54-2). The first edge-rolling cylinder (54-1) is fixedly mounted on the first edge-rolling mounting base (52-2) in the X direction by the lower end of its cylinder rod. The second edge-rolling cylinder (54-2) is fixedly connected above the cylinder body of the first edge-rolling cylinder (54-1) by its cylinder body. The cylinder rod of the second edge-rolling cylinder (54-2) extends upward and is arranged parallel to the cylinder rod of the first edge-rolling cylinder (54-1). The first edge-rolling cylinder (54-1) and the second edge-rolling cylinder (54-2) drive the edge-rolling device (51) to move in the Z direction.

4. The trouser loop machine according to claim 1, characterized in that: The feeding and conveying mechanism (3-2) includes a feeding drive motor (3-21), a feeding roller (3-22), a feeding roller transmission assembly (3-23), a feeding pressure roller (3-24), a pressure roller transmission assembly (3-25), a feeding pressure roller seat (3-26), a pressure roller seat drive cylinder (3-27), and a feeding platform (3-28). The feeding platform (3-28) is fixedly mounted on the feeding mounting base (3-1); the feeding drive motor (3-21) is fixedly mounted on the feeding mounting base (3-1); the feeding roller (3-22) is rotatably mounted in the feeding platform (3-28), with its highest point higher than the upper surface of the feeding platform (3-28), and is driven to rotate by the feeding drive motor (3-21) through the feeding roller transmission assembly (3-23); the feeding pressure roller (3-24) is rotatably mounted in the feeding platform. On the material pressure roller seat (3-26), the feeding drive motor (3-21) drives the feeding pressure roller (3-24) to rotate through the pressure roller transmission assembly (3-25). The feeding pressure roller (3-24) and the feeding roller (3-22) rotate towards each other. The feeding pressure roller (3-24) is located above the feeding roller (3-22). The pressure roller seat drive cylinder (3-27) drives the feeding pressure roller seat (3-26) to rotate, thereby making the feeding pressure roller (3-24) move closer to or away from the feeding roller (3-22).

5. The trouser loop machine according to claim 4, characterized in that: The feeding mechanism (3) also includes a joint detection mechanism (3-4); the joint detection mechanism (3-4) is used to detect the joint where two trouser loops are connected.

6. The trouser loop machine according to claim 1, characterized in that: The material handling gripper assembly (4-2) includes a fixed gripper (4-21), a movable gripper (4-22), a clamping cylinder (4-23), and a gripper reset assembly. The movable gripper (4-22) is rotatably mounted on the fixed gripper (4-21), and the clamping cylinder (4-23) is fixedly mounted on the fixed gripper (4-21). The clamping cylinder (4-23) drives the movable gripper (4-22) to form a closed clamping structure with the front part of the fixed gripper (4-21). The gripper reset assembly causes the front end of the movable gripper (4-22) to separate upward from the fixed gripper (4-21).

7. The trouser loop machine according to claim 1, characterized in that: The shearing mechanism (3-5) includes a shearing mounting base (3-51), a fixed blade (3-52), a moving blade (3-53), and a moving blade drive cylinder (3-54). The shearing mounting base (3-51) is rotatably mounted on the feeding mounting base (3-1), and its rotation axis is set in the vertical direction; the lower part of the shearing mounting base (3-51) is provided with a discharge hole (3-511); the moving blade (3-53) is driven by the moving blade driving cylinder (3-54) to move up and down and intersect with the fixed blade (3-52) to form a shearing operation, cutting off the trouser loop belt coming out of the discharge hole (3-511).

8. The trouser loop machine according to claim 7, characterized in that: The shearing mechanism (3-5) also includes a first angle adjusting cylinder (3-57) and a second angle adjusting cylinder (3-58); the first angle adjusting cylinder (3-57) and the second angle adjusting cylinder (3-58) are fixedly connected together by their respective cylinder bodies. The piston rod of the first angle adjusting cylinder (3-57) extends forward and is hinged to the feeding mounting base (3-1), with its hinge axis arranged in the vertical direction; the piston rod of the second angle adjusting cylinder (3-58) extends backward and is hinged to the shearing mounting base (3-51), with its hinge axis arranged in the vertical direction.

9. The trouser loop machine according to claim 7, characterized in that: The shearing mechanism (3-5) also includes a pallet (3-55) and a pallet drive cylinder (3-56); the lower left side of the moving blade (3-53) is provided with a pallet drive unit (3-531); The pallet drive cylinder (3-56) is a single-acting spring reset cylinder. The spring of the pallet drive cylinder (3-56) pushes the piston rod upward. The support plate (3-55) is slidably mounted on the support plate drive cylinder (3-56) in the vertical direction. The front side of the support plate (3-55) contacts the rear side of the fixed blade (3-52) and is located below the moving blade (3-53). The support plate (3-55) is connected to the piston rod of the support plate drive cylinder (3-56) in a transmission manner. The left side of the support plate (3-55) is provided with a pressing part (3-551) that cooperates with the support plate drive part (3-531) of the moving blade (3-53).

10. The trouser loop machine according to claim 1, characterized in that: It also includes an auxiliary positioning mechanism (6); the auxiliary positioning mechanism (6) includes a lower material support mechanism (61) and an upper material pressing mechanism (62); the lower material support mechanism (61) and the upper material pressing mechanism (62) cooperate to clamp and fix the corresponding part of the trouser loop belt; There are two lower material support mechanisms (61). The two lower material support mechanisms (61) are a front lower material support mechanism (61a) and a rear lower material support mechanism (61b) according to their front and rear positions. The two lower material support mechanisms (61) have the same structure, both including a material support drive cylinder (61-2) and a material support seat (61-4). The material support drive cylinder (61-2) drives the material support seat (61-4) to move up and down. The distance between the front lower material support mechanism (61a) and the rear lower material support mechanism (61b) can be adjusted. There are two upper pressing mechanisms (62). The two upper pressing mechanisms (62) are a front upper pressing mechanism (62a) and a rear upper pressing mechanism (62b) according to their front and rear positions. The two upper pressing mechanisms (62) have the same structure, both including an upper pressing head (62-1) and a pressing head driving cylinder (62-4). The pressing head driving cylinder (62-4) drives the upper pressing head (62-1) to move up and down. The distance between the front upper pressing mechanism (62a) and the rear upper pressing mechanism (62b) can be adjusted. The upper pressure head (62-1) of the front upper pressure mechanism (62a) cooperates with the material support seat (61-4) of the front lower material support mechanism (61a) to clamp the corresponding part of the trouser loop; the upper pressure head (62-1) of the rear upper pressure mechanism (62b) cooperates with the material support seat (61-4) of the rear lower material support mechanism (61b) to clamp the corresponding part of the trouser loop.

11. The trouser loop machine according to claim 10, characterized in that: The upper pressing mechanism (62) also includes a limiting rod (62-2); there are two limiting rods (62-2), and the two limiting rods (62-2) are fixedly installed on the upper pressing head (62-1) in the left and right directions, and the distance between the two limiting rods (62-2) can be adjusted.

12. The trouser loop machine according to claim 10, characterized in that: The auxiliary positioning mechanism (6) also includes a redundant positioning mechanism (63); the redundant positioning mechanism (63) includes a redundant positioning lever (63-1) and a lever drive cylinder (63-2); the lever drive cylinder (63-2) drives the redundant positioning lever (63-1) to move up and down.

13. A method for operating a trouser loop machine, comprising the following steps: Step 1: Adjust the distance between the two hemming devices (51); adjust the distance between the front lower material support mechanism (61a) and the rear lower material support mechanism (61b); adjust the distance between the front upper material pressing mechanism (62a) and the rear upper material pressing mechanism (62b); adjust the distance between the moving clamping rod (51-12) and the fixed clamping rod (51-11) according to the thickness of the trouser loop (10) so that it is 0.5 to 2 mm greater than the thickness of the thickest part of the trouser loop (10); adjust the position of the detection sensor (3-42) according to the thickness of the trouser loop (10); Step 2: Thread the corresponding part of the rolled-up trouser loop into the guiding mechanism (3-3) and the feeding conveying mechanism (3-2) of the feeding mechanism (3); Step 3: The material taking component (4) clamps the rear end of the trouser loop (10), and then pulls the trouser loop (10) backward. At the same time, the feeding conveyor (3-2) of the feeding mechanism (3) simultaneously conveys the trouser loop (10) backward. Furthermore, the auxiliary positioning mechanism (6) clamps and positions the loop (10) between the material taking component (4) and the feeding mechanism (3); the material supporting mounting seat (61-1) of the lower material supporting mechanism (61) rises to the lower side of the loop (10) and supports the loop (10) from below, and then the upper pressure head (62-1) moves downward together with the material supporting mounting seat (61-1) to clamp and fix the loop (10); Step 4: While the material taking component (4) pulls the trouser loop (10) backward, the hemming device (51) of the hemming mechanism (5) moves to the right from the initial state to the rightmost end. When the hemming device (51) is completely out to the right from below the trouser loop (10), the cylinder rod of the second drive cylinder (54-2) of the hemming device (54) of the hemming device (5) also extends, so that the distance between the rotation axis of the hemming material clamp (51-13) and the upper surface of the feeding table (3-28) is greater than the radius of the fixed clamping rod (51-11) by 0.3 to 1 mm. The cylinder rod of the auxiliary clamping drive device (51-5) retracts downward, and the right end of the auxiliary clamping plate (51-4) is pulled down by the auxiliary clamping reset device (51-6), thereby raising the left end of the auxiliary clamping plate (51-4) upward and away from the fixed clamping rod (51-11). Then, the fixed edge curler (51b) of the edge curler (51) and the edge curling material clamping seat (51-13) of the adjusting edge curler (51a) rotate upward and opposite each other by 270 degrees until the moving clamping rod (51-12) is located above the fixed clamping rod (51-11). The edge curler X-direction drive device (52) drives the edge curler (51) to move to the left along the X direction until the corresponding part of the trouser loop (10) is located between the fixed clamping rod (51-11) and the moving clamping rod (51-12) of the edge curling material clamping assembly (51-1) of the edge curler (51). Then, the material taking component (4) loosens the rear end of the trouser loop (10), and the cutting mechanism (3-5) cuts the trouser loop (10). After cutting, the feeding roller (3-22) and the feeding pressure roller (3-24) of the feeding conveying mechanism (3-2) clamp the trouser loop (10) and convey it backward a certain distance. Then, the fixed hemming device (51b) of the hemming device (51) and the hemming material clamp (51-13) of the adjusting hemming device (51a) rotate downward and towards each other by 270 degrees, so that the cut trouser loop... The two ends of the loop (10) are rolled downwards to a relative state; then, the cylinder rod of the auxiliary clamping drive device (51-5) extends upwards to push the right end of the auxiliary clamping plate (51-4) upwards, thereby pressing the left end of the auxiliary clamping plate (51-4) downwards, and clamping and fixing the corresponding part of the trouser loop (10) with the fixed clamping rod (51-11); the lower material support mechanism (61) of the auxiliary positioning mechanism (6) descends, and the upper pressure head (62-1) of the upper pressure mechanism (62) rises upwards; Step 5: The worker first places the main body fabric on the needle plate of the sewing machine head (2), and the hemming device Z retracts downwards from the cylinder rod of the second drive cylinder (54-2); then the hemming device X drive device (52) of the hemming mechanism (5) drives the hemming device (51) to move to the left along the X direction to below the two presser feet of the sewing machine head (2). Next, the hemming device Z retracts from the cylinder rod of the first drive cylinder (54-1), causing the hemming device (51) to continue to descend, thereby... The rolled-up trouser loop is placed on the main body fabric on the needle plate of the sewing machine head (2). Then the presser foot of the sewing machine head (2) presses down first to fix the trouser loop. After the trouser loop is fixed, the hemming device X-direction drive (52) drives the hemming device (51) to move to the right along the X direction to the initial position. When the hemming device (51) leaves the trouser loop, the presser foot of the sewing machine head (2) presses down again to press the trouser loop (10) tightly and fix it on the needle plate, and then the sewing is performed. While the edge curler X is reset, the material taking component (4) takes material for the next time.

14. The method of operating the trouser loop machine according to claim 13, wherein step three further includes the following step: Before the upper pressure head (62-1) clamps the loop (10) together with the material support mounting seat (61-1), the redundant pressure bar (63-1) descends. At this time, the feeding conveyor mechanism (3-2) actively feeds out the excess portion of the loop belt (10), and the redundant pressure bar (63-1) arches the corresponding part of the loop belt (10) from above downwards, making it lower than the upper surface of the feeding table (3-28), so that the loop belt (10) leaves a little excess. Then the upper pressure head (62-1) clamps the loop (10) together with the material support mounting seat (61-1) from below. Step four also includes the following step: the redundant pressure bar (63-1) rises.

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