Automatic edge binding machine

Abstract

The present invention discloses an automatic overlock sewing machine, which includes a frame, a working platform, and an overlock sewing head. The working platform includes a main table board and a head table board. The key point is that it further includes a material pulling device. The material pulling device includes a mounting seat assembly, a material pulling roller, a feeding presser foot, a roller adjusting assembly, and a detection assembly. The mounting seat assembly is arranged on the head table board and is located on the right side of the overlock sewing head. The roller adjusting assembly is arranged on the mounting seat assembly. The material pulling roller is rotatably arranged on the roller adjusting assembly, and the roller adjusting assembly controls the lifting or lowering of the material pulling roller. When the material pulling roller is lowered, the fabric drives the material pulling roller to rotate, and at the same time, the fabric is guided backward by the material pulling roller. The detection assembly is used to judge whether the material pulling roller needs to be lifted or lowered. The feeding presser foot is arranged on the mounting seat assembly, and its position in the up and down direction can be adjusted to ensure that the fabric is in a flat state when feeding.

Description

Technical Field

[0001] The present invention relates to the technical field of sewing equipment, and specifically to an automatic overlock sewing machine for the overlocking process in the garment processing. Background Art

[0002] There is a process called overlocking (also called edge binding) in the garment processing. Since the materials such as polyester fabrics are generally synthetic fibers and relatively hard in texture, the yarns at the edge seams of the cut fabric are likely to spread out. Therefore, overlocking is required. Overlocking is to sew a circle of edges at the edge seams with a special overlock sewing machine to prevent the yarns in the fabric from spreading out and also play a role in aesthetics. The existing overlock sewing machines usually include a frame, a working platform and an overlock sewing head. During operation, it is necessary to manually hold the fabric for feeding, and the working efficiency is too low. Now there are also some overlock sewing machines with feeding devices, but the structures of these feeding devices are mostly relatively complex, and the effects are not ideal, and they cannot achieve a good effect of feeding the fabric in place. Summary of the Invention

[0003] The purpose of the present invention is to provide an automatic overlock sewing machine for garment overlocking with a simple structure and a relatively high degree of automation.

[0004] The basic technical solution to achieve the purpose of the present invention is: an automatic overlock sewing machine, including a frame, a working platform and an overlock sewing head. The working platform includes a main table board and a head table board. The main table board is fixedly arranged on the frame and is in a horizontal state. There is a head hole penetrating through the upper and lower parts of the main table board and opening backward on the left part of the main table board. The overlock sewing head is fixedly arranged on the frame and is located in the head hole of the main table board. The head table board is detachably and fixedly arranged in the head hole of the main table board, cooperates with the overlock sewing head, and covers the corresponding part of the overlock sewing head. The upper surface of the head table board is flush with the upper surface of the main table board. Its structural feature is: it also includes a fabric pulling device. The fabric pulling device includes a mounting seat assembly, a fabric pulling roller, a feeding presser foot, a roller adjusting assembly and a detection assembly. The mounting seat assembly is arranged on the head table board and is located on the right side of the overlock sewing head. The roller adjusting assembly is arranged on the mounting seat assembly. The fabric pulling roller is rotatably arranged on the roller adjusting assembly and is controlled by the roller adjusting assembly to lift or press down. When the fabric pulling roller presses down, the fabric drives the fabric pulling roller to rotate, and at the same time the fabric is guided backward by the fabric pulling roller. The detection assembly is used to judge whether the fabric pulling roller needs to lift or press down. The feeding presser foot is arranged on the mounting seat assembly, and its position in the up and down direction can be adjusted to ensure that the fabric is in a flat state when feeding.

[0005] The technical scheme based on the above basic technical scheme is: the mounting seat assembly includes a material guide seat, a first adjusting hand wheel of the material guide seat, a lifting seat, a lifting seat driving cylinder, a lifting seat adjusting hand wheel and a lifting seat limit screw. The material guide seat is slidably arranged on the machine head table along the front-back direction. A guide arc surface is provided at the right front part of the material guide seat. The first adjusting hand wheel of the material guide seat is rotatably arranged on the machine head table by its central cylindrical part, and its rotation axis is arranged along the front-back direction. The material guide seat is provided with a first screw hole with an opening facing backwards to cooperate with the front screw part of the first adjusting hand wheel of the material guide seat. The screw of the first adjusting hand wheel of the material guide seat is screwed into the first screw hole of the material guide seat, so that the material guide seat can be moved forward and backward by rotating the first adjusting hand wheel of the material guide seat, and the position of the material guide seat on the machine head table in the front-back direction is changed. The lifting seat is slidably arranged on the material guide seat along the up-down direction, and the lifting seat is driven by the lifting seat driving cylinder to move up and down. The lifting seat adjustment hand wheel is rotatably arranged in the material guide seat by its lower cylindrical section, and its rotation axis is arranged in the up-down direction. The screw rod part in the middle of the lifting seat adjustment hand wheel is screwed on the lifting seat, so that the position of the lifting seat in the up-down direction can be changed by rotating the lifting seat adjustment hand wheel. The screw rod part of the lifting seat limit screw passes through the lifting seat from top to bottom and then screws on the material guide seat, limiting the lifting seat from the top to limit the height of the lifting seat.

[0006] The technical scheme based on the above-mentioned corresponding technical schemes is: the feed presser foot is horizontally fixed on the lower side of the front part of the lifting seat, and the feed presser foot is provided with a waist-shaped roller hole running through it from top to bottom. The roller hole is arranged with the left part facing backward and the right part facing forward. The roller adjustment assembly includes a roller adjustment arm and an adjustment arm driving cylinder. The roller adjustment arm is rotatably connected and arranged on the middle part of the front part of the lifting seat from the upper end of the right part. The pick-up roller is rotatably arranged on the lower end of the left part of the roller adjustment arm, and the angle α between the surface vertically arranged through the rotation axis of the pick-up roller and the surface vertically arranged to the left and right is greater than 45 degrees and less than 90 degrees. The left end of the roller adjustment arm is driven by the adjustment arm driving cylinder to lift or press down, thereby lifting or pressing down the pick-up roller at the left end of the roller adjustment arm. The pick-up roller passes downward through the waist-shaped roller hole of the feed presser foot and presses the cloth tightly on the head platen.

[0007] The technical solution based on the above-mentioned corresponding technical solutions is: further comprising a bone position detection device. The bone position detection device is used to determine whether there is a bone position on the cloth that needs to pass through the feeding presser foot.

[0008] The technical solution based on the above respective technical solutions is as follows: The bone position detection device includes a bone position guiding block, a bone position rotating arm, a rotating arm torsion spring, a torsion spring adjusting handwheel, and a proximity switch. The torsion spring adjusting handwheel is screwed onto the mounting seat assembly of the blanking device by its rear-end screw part. Its axis is arranged in the front-rear direction. The bone position rotating arm is rotatably arranged on the middle cylindrical section of the torsion spring adjusting handwheel at its middle part, located on the front side of the lifting seat. Its rotation axis is horizontally arranged in the front-rear direction. The bone position guiding block is fixedly arranged at the lower end of the bone position rotating arm. The lower part of the bone position guiding block is conical, and the lower end head of the cone is spherical. A detection plate part is provided at the upper end of the bone position rotating arm. The rotating arm torsion spring is sleeved on the middle cylindrical section of the torsion spring adjusting handwheel, located in front of the bone position rotating arm. One end of the rotating arm torsion spring is arranged at the upper end of the bone position rotating arm, and the other end is arranged in the handle of the torsion spring adjusting handwheel. The rotating arm torsion spring is used to make the upper end of the bone position rotating arm approach the proximity switch to the left, and make the bone position guiding block approach the machine head platen downward. The proximity switch is fixedly arranged on the mounting seat assembly of the blanking device. The detection plate part at the upper end of the bone position rotating arm abuts against the proximity switch from right to left. The proximity switch is used to detect whether the detection plate part at the upper end of the bone position rotating arm rotates away from the proximity switch to the right.

[0009] The technical solution based on the above respective technical solutions is as follows: It further includes a first auxiliary discharging device. The first auxiliary discharging device includes a first mounting seat, a first pressing head, a first pressing head driving cylinder, a first connecting seat, a first linear guide rail, and a first pressing head pulling cylinder. The first mounting seat is fixedly arranged on the overlock sewing machine head, and its front part extends forward, located in front of the overlock sewing machine head. The first linear guide rail is horizontally fixedly arranged on the first mounting seat by its guide rail in the left-right direction, located on the right side of the cylinder body of the first pressing head pulling cylinder. The first connecting seat is fixedly arranged on the slider of the first linear guide rail. The first connecting seat is driven by the first pressing head pulling cylinder to move left and right along the first linear guide rail. The first pressing head driving cylinder is fixedly arranged on the first connecting seat by its cylinder body, and its piston rod extends downward. The first pressing head is fixedly arranged at the lower end head of the piston rod of the first pressing head driving cylinder. The first pressing head is cylindrical.

[0010] The technical solution based on the above respective technical solutions is as follows: It further includes a second auxiliary discharging device. The second auxiliary discharging device includes a second mounting frame, a second pressing head, a second pressing head driving cylinder, a second connecting seat, a second linear guide rail, and a second pressing head pulling cylinder. The second mounting frame is fixedly arranged on the upper left part of the main platen of the working platform, located on the left side of the first auxiliary discharging device. The second linear guide rail is fixedly arranged on the second mounting frame by its guide rail in the left-right direction. The second connecting seat is fixedly arranged on the slider of the second linear guide rail. The second pressing head driving cylinder is fixedly arranged on the second connecting seat in the up-down direction by its cylinder body, and its piston rod extends downward. The second pressing head is fixedly arranged at the lower end head of the piston rod of the second pressing head driving cylinder. The second pressing head is cylindrical. The second connecting seat is driven by the second pressing head pulling cylinder to move left and right along the second linear guide rail.

[0011] The technical solution based on the above-mentioned corresponding technical solutions is: it also includes a material collecting device, which is used to collect and place the sewn cloth.

[0012] The technical solution based on the above-mentioned corresponding technical solutions is that the working platform also includes an adjustable table plate, and the drooping distance of the cloth after sewing is completed can be adjusted by adjusting the table plate.

[0013] The technical scheme based on the above-mentioned corresponding technical schemes is: the adjusting table is hingedly connected to the front part of the left discharge end of the main table by its front end, and its rotating axis is perpendicular to the main table; the rear part of the adjusting table is provided with an arc-shaped table adjustment hole running through it from top to bottom; the center of the table adjustment hole is located on the rotating axis at the front end of the adjusting table, and the adjusting table is fixedly connected to the main table through a plum blossom handle and a corresponding nut; the screw of the plum blossom handle passes through the table adjustment holes of the main table and the adjusting table in turn from top to bottom, and then is screwed on the corresponding nut located on the lower side of the adjusting table, thereby locking the adjusting table and the main table in position and fixing them together.

[0014] The present invention has the following beneficial effects: (1) The automatic overlocking machine of the present invention has a simple structure. The rear edge of the cloth to be sewn can be automatically guided and adjusted through the feeding device, thereby saving the corresponding labor. Workers do not need to hold the cloth by hand for feeding and sewing. After sewing is completed, the material is collected by the collecting device. The degree of automation is high. During the sewing process, workers can prepare the next piece of cloth to be sewn, which greatly improves production efficiency.

[0015] (2) The head platen of the automatic overlocking machine of the present invention is fixed on the main platen by magnet adsorption, and the stripping device is arranged on the head platen, which is convenient for disassembly and maintenance of the overlocking head.

[0016] (3) The automatic overlocking machine of the present invention is provided with a material stripping device and a mounting seat assembly, through which the position of the positioning support plate in the front-to-back direction can be adjusted to meet the requirements of sewing different overlock widths. The height of the feed presser foot can be manually adjusted by the lifting seat adjustment hand wheel to meet the requirements of fabrics of different thicknesses, ensuring that the fabric is in a flat state after passing through the feed presser foot, thereby improving the sewing quality. The lifting seat drives the cylinder to automatically control the feed presser foot to be lifted, ensuring that the bone position on the fabric can pass smoothly.

[0017] (4) The material pulling roller of the material pulling device of the automatic edge binding machine of the present invention is rotatably arranged at the lower left part of the roller adjusting arm. The angle between the vertical plane passing through the rotation axis of the material pulling roller and the left-right vertical plane is greater than 45 degrees and less than 90 degrees. The angle can be designed and adjusted according to the sewing speed, which can adapt to different edge binding machine heads, has strong adaptability and wide application range. When the material pulling roller descends and contacts the fabric, due to the influence of the rolling guidance of the material pulling roller, the fabric is pulled backward, and the rear edge of the fabric remains in contact with the positioning guide surface of the positioning back plate. The material pulling roller does not require additional power, has a simple structure, the material pulling speed is adapted to the sewing speed, has good use reliability, and improves the sewing quality.

[0018] (5) The material guiding seat of the material pulling device of the automatic edge binding machine of the present invention is provided with a guiding arc surface. When the fabric passes through, it is automatically guided forward, and then enters and adheres to the positioning guide surface of the positioning back plate, ensuring that the sewing width is consistent and improving the sewing quality.

[0019] (6) The working platform of the automatic edge binding machine of the present invention is provided with an adjustable table board. By means of the adjustable table board, the distance of the fabric sag can be controlled, that is, the position when the pushing plate clamps and fixes the fabric is adjusted, ensuring that the middle part of the fabric is placed on the feeding rod, keeping the fabric balanced and not deviating to one side and causing slipping.

[0020] (7) The automatic edge binding machine of the present invention is provided with a bone position detection device. The bone position detection device has a simple structure, can adjust the magnitude of the rotational resistance of the bone position rotating arm, so as to adapt to fabrics of different materials, will not damage the fabric, has accurate judgment and good reliability. The lower part of the bone position guiding block is conical, and the lower end head of the cone is spherical, which is beneficial to reducing the resistance with the fabric, has good passability, is convenient for the fabric to pass through, and is not easy to damage the fabric.

[0021] (8) The automatic edge binding machine of the present invention is provided with a first auxiliary discharging device and a second auxiliary discharging device, which can adapt to the auxiliary discharging of fabrics of different lengths. It not only saves labor, greatly improves the work efficiency and further improves the automation degree, but also has strong adaptability and wide application range.

[0022] (9) The automatic edge binding machine of the present invention is provided with a material receiving device. Workers only need to place the fabric. From the opposite side to sewing and material receiving, no manual labor is required, which further improves the automation degree and production and processing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic structural diagram of the automatic edge binding machine of the present invention

[0024] Figure 2 is Figure 1 the left view schematic diagram of

[0025] Figure 3is Figure 1 The right-side view schematic diagram of

[0026] Figure 4 is Figure 1 The top view schematic diagram of

[0027] Figure 5 is the schematic diagram when observing from the Figure 1 upper right front of

[0028] Figure 6 is the schematic diagram when observing from the Figure 1 upper left front of

[0029] Figure 7 is the schematic diagram of the main platen when observing from the Figure 1 upper right front of

[0030] Figure 8 is Figure 1 The enlarged schematic diagram of the blanking device in

[0031] Figure 9 is Figure 8 The left-side view schematic diagram of

[0032] Figure 10 is Figure 8 The right-side view schematic diagram of

[0033] Figure 11 is Figure 8 The top view schematic diagram of

[0034] Figure 12 is the schematic diagram when observing from the Figure 8 upper left front of

[0035] Figure 13 is the schematic diagram when observing from the Figure 8 upper right front of

[0036] Figure 14 is the schematic diagram when observing from the Figure 8 upper right rear of

[0037] Figure 15 is the schematic diagram of the mounting seat assembly of the blanking device when observing from the Figure 8 lower left rear of

[0038] Figure 16 is the schematic diagram of the mounting seat assembly of the blanking device when observing from the Figure 8 upper left rear of

[0039] Figure 17 is the schematic diagram of the first auxiliary discharging device when observing from the Figure 1 upper left front of

[0040] Figure 18Schematic diagram of the second auxiliary discharging device when observed from the upper left front of Figure 1

[0041] Figure 19 Schematic diagram of the material receiving device when observed from the upper left front of Figure 1

[0042] Figure 20 Schematic diagram of the material receiving device when observed from the upper right front of Figure 1

[0043] Reference numerals in the drawings are:

[0044] Frame 1, working platform 2, main table board 2-1, head hole 2-11, magnet 2-12, adjusting table board 2-2, material placing table board 2-3, head table board 2-4, overcasting head 3,

[0045] Material scraping device 4,

[0046] Mounting seat assembly 41, material guiding seat 41-1, guiding arc surface 41-11, first adjusting handwheel of material guiding seat 41-2, lifting seat 41-3, lifting seat driving cylinder 41-4, lifting seat adjusting handwheel 41-5, lifting seat limit screw 41-6,

[0047] Material scraping roller 42, feeding presser foot 43,

[0048] Roller adjusting assembly 44, roller adjusting arm 44-1, adjusting arm driving cylinder 44-2,

[0049] Detection assembly 45, first photoelectric sensor 45-1, second photoelectric sensor 45-2,

[0050] Positioning back plate 46,

[0051] Bone position detection device 5, bone position guiding block 5-1, bone position rotating arm 5-2, detection plate part 5-21, rotating arm torsion spring 5-3, torsion spring adjusting handwheel 5-4, proximity switch 5-5,

[0052] First auxiliary discharging device 6, first mounting seat 6-1, first pressure head 6-2, first pressure head driving cylinder 6-3, first connecting seat 6-4, first linear guide 6-5, first pressure head material pulling cylinder 6-6,

[0053] Second auxiliary discharging device 7, second mounting frame 7-1, second pressure head 7-2, second pressure head driving cylinder 7-3, second connecting seat 7-4, second linear guide 7-5, second pressure head material pulling cylinder 7-6,

[0054] Material receiving device 8, material receiving frame 8-1, pushing plate 8-2, discharging air pipe 8-3, pushing plate driving device 8-4, pushing plate guiding mechanism 8-5, cylindrical guide 8-5a. DETAILED DESCRIPTION

[0055] In order to make the content of the present invention more clearly understood, the present invention is further described in detail below based on specific embodiments and in conjunction with the accompanying drawings. Figure 1 The direction shown is carried out, that is, Figure 1 The up, down, left, and right directions shown are the up, down, left, and right directions described. Figure 1 The direction is forward, away from Figure 1 The side that is at the rear is the one at the rear.

[0056] It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings. At the same time, in the description of the present invention, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0057] It should be understood that terms such as "upper", "lower", "inside" and "outside" to indicate directions or positional relationships are based on the positional relationships described in the drawings and are only used to facilitate the description of the present invention or simplify the description, rather than to indicate a specific direction that must be possessed.

[0058] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0059] (Example 1)

[0060] See Figures 1 to 20 The automatic overlocking machine of the present invention comprises a frame 1, a working platform 2, an overlocking head 3, a material stripping device 4, a bone position detection device 5, a first auxiliary material discharging device 6, a second auxiliary material discharging device 7 and a material receiving device 8.

[0061] See Figures 1 to 6The working platform 2 includes a main table 2-1, an adjustment table 2-2, a discharge table 2-3 and a head table 2-4. The main table 2-1 is fixedly arranged on the frame 1 and is in a horizontal state. The left part of the main table 2-1 is provided with a head hole 2-11 which runs through it from top to bottom and opens backward. The adjustment table 2-2 is hingedly connected to the front part of the left discharge end of the main table 2-1 by its front end, and its rotation axis is perpendicular to the main table 2-1. The rear part of the adjustment table 2-2 is provided with an arc-shaped table adjustment hole 2-21 which runs through it from top to bottom. The center of the table adjustment hole 2-21 is located on the front end rotation axis of the adjustment table 2-2, and the adjustment table 2-2 is fixedly connected to the main table 2-1 through a plum blossom handle 2-22 and a corresponding nut. The screw of the plum blossom handle 2-22 passes through the platen adjustment holes 2-21 of the main platen 2-1 and the adjustment platen 2-2 from top to bottom, and then screws on the corresponding nuts located at the lower side of the adjustment platen 2-2, so that the adjustment platen 2-2 and the main platen 2-1 are locked in position and fixedly connected. The unloading platen 2-3 is fixedly arranged on the frame 1, located on the upper right side of the head hole 2-11 of the main platen 2-1, and is used to place the fabric to be sewn.

[0062] See Figures 1 to 6 The overlock head 3 is fixedly arranged on the frame 1 and is located in the head hole 2-11 of the main table 2-1. The head table 2-4 is fixedly arranged in the head hole 2-11 of the main table 2-1 by adsorption by the magnet 2-12 arranged on the main table 2-1, and cooperates with the overlock head 3 to cover the corresponding part of the overlock head 3. The upper surface of the head table 2-4 is flush with the upper surface of the main table 2-1. The overlock head 3 is directly purchased on the market, and the overlock head 3 is equipped with a thread cutting device, and the thread is cut by the thread cutting device after sewing is completed.

[0063] See Figures 1 to 16 The scraping device 4 includes a mounting seat assembly 41, a scraping roller 42, a feeding presser foot 43, a roller adjustment assembly 44, a detection assembly 45 and a positioning support plate 46.

[0064] The mounting seat assembly 41 includes a material guiding seat 41-1, a first adjusting handwheel 41-2 for the material guiding seat, a lifting seat 41-3, a lifting seat driving cylinder 41-4, a lifting seat adjusting handwheel 41-5 and a lifting seat limiting screw 41-6. The material guiding seat 41-1 is slidably arranged on the machine head platen 2-4 in the front-back direction. A guiding arc surface 41-11 is provided at the front part of the material guiding seat 41-1. The positioning back plate 46 is fixedly arranged on the material guiding seat 41-1, on the left side of the material guiding seat 41-1. The positioning guiding surface of the positioning back plate 46 is vertically arranged in the left-right direction, and the right end is connected to the left end of the guiding arc surface 41-11 of the material guiding seat 41-1. The lower side surface of the positioning back plate 46 is in contact with the machine head platen 2-4. The first adjusting handwheel 41-2 for the material guiding seat is rotatably arranged on the machine head platen 2-4 by its middle cylindrical part, and its rotation axis is arranged in the front-back direction. A first screw hole which opens backward and matches with the front screw part of the first adjusting handwheel 41-2 for the material guiding seat is provided on the material guiding seat 41-1. The screw of the first adjusting handwheel 41-2 for the material guiding seat is screwed into the first screw hole of the material guiding seat 41-1, so that by rotating the first adjusting handwheel 41-2 for the material guiding seat, the material guiding seat 41-1 moves back and forth, changing the position of the material guiding seat 41-1 in the front-back direction on the machine head platen 2-4. The lifting seat 41-3 is slidably arranged on the material guiding seat 41-1 in the up-down direction. The lifting seat driving cylinder 41-4 is a CQ2B12-10D thin cylinder of SMC. The lifting seat driving cylinder 41-4 is fixedly arranged in the material guiding seat 41-1 by its cylinder body, and its piston rod extends upward and is fixedly connected to the lifting seat 41-3, so that the lifting seat 41-3 is driven by the lifting seat driving cylinder 41-4 to move up and down. The lifting seat adjusting handwheel 41-5 is rotatably arranged in the material guiding seat 41-1 by its lower cylindrical section, and its rotation axis is arranged in the up-down direction. The middle screw part of the lifting seat adjusting handwheel 41-5 is screwed onto the lifting seat 41-3, so that by rotating the lifting seat adjusting handwheel 41-5, the position of the lifting seat 41-3 in the up-down direction is changed. The screw part of the lifting seat limiting screw 41-6 passes through the lifting seat 41-3 from top to bottom and is then screwed onto the material guiding seat 41-1, limiting the lifting seat 41-3 from above and restricting the rising height of the lifting seat 41-3.

[0065] The feeding presser foot 43 is horizontally and fixedly arranged on the lower front side of the lifting seat 41-3. An oval roller hole 43-1 penetrating through its up and down is provided on the feeding presser foot 43. The roller hole 43-1 is arranged with its left part inclined backward and its right part inclined forward.

[0066] The roller adjustment assembly 44 includes a roller adjustment arm 44-1 and an adjustment arm drive cylinder 44-2. The roller adjustment arm 44-1 is rotatably connected to the middle part of the front of the lifting seat 41-3 at the upper end of its right part. The blanking roller 42 is rotatably arranged at the lower end of the left part of the roller adjustment arm 44-1. The angle α between the plane passing through the axis of rotation of the blanking roller 42 and vertically arranged and the plane vertically arranged in the left-right direction is greater than 45 degrees and less than 90 degrees, and is 72 degrees in this embodiment. The adjustment arm drive cylinder 44-2 uses a CJPS6-10 needle-type cylinder of SMC. The adjustment arm drive cylinder 44-2 is rotatably connected to the left part of the front of the lifting seat 41-3 by its cylinder block. The piston rod of the adjustment arm drive cylinder 44-2 extends rightward and downward, and the end of the piston rod is hinged to the middle part of the roller adjustment arm 44-1, so that the left end of the roller adjustment arm 44-1 is lifted or pressed down by the adjustment arm drive cylinder 44-2, and further the blanking roller 42 at the left end of the roller adjustment arm 44-1 is lifted or pressed down. After the blanking roller 42 passes downward through the oval roller hole 43-1 of the feeding presser foot 43, the fabric is pressed tightly on the machine head table board 2-4.

[0067] The detection assembly 45 includes a first photoelectric sensor 45-1 and a second photoelectric sensor 45-2. Both the first photoelectric sensor 45-1 and the second photoelectric sensor 45-2 use an E3T-SR41 2M retroreflective photoelectric sensor of Omron. The first photoelectric sensor 45-1 is fixedly arranged on the right part of the lifting seat 41-3 and is used to detect whether the rear edge of the fabric is in the vertical plane where the positioning guiding surface of the positioning back plate 46 is located.

[0068] The second photoelectric sensor 45-2 is fixedly arranged on the left part of the lifting seat 41-3 and is used to detect whether the fabric feeding is ended.

[0069] See Figures 1 to 16 , the bone position detection device 5 includes a bone position guiding block 5-1, a bone position rotating arm 5-2, a rotating arm torsion spring 5-3, a torsion spring adjusting handwheel 5-4 and a proximity switch 5-5.

[0070] The torsion spring adjusting handwheel 5-4 is screwed to the front right part of the lifting seat 4-3 of the blanking device 4 through the screw part at its rear end. Its axis is arranged in the front-rear direction. The bone position swing arm 5-2 is rotatably arranged in the middle cylindrical section of the torsion spring adjusting handwheel 5-4 through its middle part, and is located on the front side of the lifting seat 4-3. Its rotation axis is horizontally arranged in the front-rear direction. The bone position guiding block 5-1 is fixedly arranged at the lower end of the bone position swing arm 5-2. The lower part of the bone position guiding block 5-1 is conical, and the lower end head of the cone is spherical. A detection plate part 5-21 is arranged at the upper end of the bone position swing arm 5-2. The swing arm torsion spring 5-3 is sleeved on the middle cylindrical section of the torsion spring adjusting handwheel 5-4, and is located in front of the bone position swing arm 5-2. One end of the swing arm torsion spring 5-3 is arranged at the upper end of the bone position swing arm 5-2, and the other end is arranged in the handle of the torsion spring adjusting handwheel 5-4. The swing arm torsion spring 5-3 is used to make the upper end of the bone position swing arm 5-2 approach the proximity switch 5-5 to the left, and make the bone position guiding block 5-1 approach the machine head platen 2-4 downward. By rotating the torsion spring adjusting handwheel 5-4, the magnitude of the rotation resistance of the bone position swing arm 5-2 is adjusted. The swing arm torsion spring 5-3 is still in a compressed state in the axial direction of the torsion spring adjusting handwheel 5-4, and is used to keep the rotating torsion spring adjusting handwheel 5-4 in the corresponding adjusted position (i.e., the self-locking state). The proximity switch 5-5 is fixedly arranged on the right side of the lifting seat 4-3. The detection plate part 5-21 at the upper end of the bone position swing arm 5-2 abuts against the proximity switch 5-5 from right to left. The proximity switch 5-5 is used to detect whether the detection plate part 5-21 at the upper end of the bone position swing arm 5-2 rotates away from the proximity switch 5-5 to the right.

[0071] See Figures 1 to 6 and Figure 17 , the first auxiliary discharging device 6 includes a first mounting seat 6-1, a first pressing head 6-2, a first pressing head driving cylinder 6-3, a first connecting seat 6-4, a first linear guide rail 6-5 and a first pressing head pulling cylinder 6-6. The first mounting seat 6-1 is fixedly arranged on the overlock sewing head 3, and its front part extends forward and is located in front of the overlock sewing head 3. The first pressing head pulling cylinder 6-6 has its cylinder body fixedly arranged on the first mounting seat 6-1, and its piston rod extends to the right. The first linear guide rail 6-5 has its guide rail horizontally fixedly arranged on the first mounting seat 6-1 in the left-right direction, and is located on the right side of the cylinder body of the first pressing head pulling cylinder 6-6. The first connecting seat 6-4 is fixedly arranged on the slider of the first linear guide rail 6-5. The end of the piston rod of the first pressing head pulling cylinder 6-6 is hinged to the first connecting seat 6-4, so that the first connecting seat 6-4 is driven by the first pressing head pulling cylinder 6-6 to move left and right along the first linear guide rail 6-5. The first pressing head driving cylinder 6-3 has its cylinder body fixedly arranged on the first connecting seat 6-4, and its piston rod extends downward. The first pressing head 6-2 is fixedly arranged at the lower end of the piston rod of the first pressing head driving cylinder 6-3. The first pressing head 6-2 is cylindrical and is made of nylon material.

[0072] See Figures 1 to 6 and Figure 18 , the second auxiliary discharging device 7 includes a second mounting frame 7-1, a second pressing head 7-2, a second pressing head driving cylinder 7-3, a second connecting seat 7-4, a second linear guide rail 7-5 and a second pressing head pulling cylinder 7-6. The second mounting frame 7-1 is fixedly arranged on the upper left part of the main table board 2-1 of the working platform 2, to the left of the first auxiliary discharging device 6. The second linear guide rail 7-5 is fixedly arranged on the second mounting frame 7-1 along the left-right direction by its guide rail, and the second connecting seat 7-4 is fixedly arranged on the slider of the second linear guide rail 7-5. The second pressing head driving cylinder 7-3 is fixedly arranged on the second connecting seat 7-4 along the up-down direction by its cylinder body, and its piston rod extends downward. The second pressing head 7-2 is fixedly arranged on the lower end head of the piston rod of the second pressing head driving cylinder 7-3. The second pressing head 7-2 is cylindrical, and the second pressing head 7-2 is made of nylon material. The second pressing head pulling cylinder 7-6 adopts a SMC CY3B10-250 rodless cylinder, and the second connecting seat 7-4 is fixedly connected with the slider of the second pressing head pulling cylinder 7-6, so that the second connecting seat 7-4 is driven by the second pressing head pulling cylinder 7-6 to move left and right along the second linear guide rail 7-5.

[0073] See Figures 1 to 6 , Figure 19 and Figure 20, the material receiving device 8 includes a material receiving rack 8-1, a pusher plate 8-2, a discharge air pipe 8-3, a pusher plate driving device 8-4, and a pusher plate guiding mechanism 8-5. There are two sets of pusher plate guiding mechanisms 8-5, and the structures of the two sets of pusher plate guiding mechanisms 8-5 are the same, both including a cylindrical guide rail 8-5a and a linear bearing. The material receiving rack 8-1 is fixedly arranged on the left part of the frame 1, and its height can be adjusted. A material placing rod 8-11 is arranged in the middle of the material receiving rack 8-1 along the front-rear direction. The pusher plate driving device 8-4 adopts a cylinder driving mode, and the cylinder in this embodiment uses a CDM2B20-200 cylinder of SMC. The cylinder of the pusher plate driving device 8-4 is horizontally fixedly arranged on the material receiving rack 8-1 along the left-right direction by its cylinder body, and its piston rod extends to the left. The two sets of pusher plate guiding mechanisms 8-5 are respectively arranged on the front and rear sides of the pusher plate driving device 8-4. The linear bearing of the pusher plate guiding mechanism 8-5 is fixedly arranged on the material receiving rack 8-1 along the left-right direction by its axis, and the cylindrical guide rail 8-5a is slidably arranged in the linear bearing. The right ends of the cylindrical guide rails 8-5a of the two sets of pusher plate guiding mechanisms 8-5 are fixedly connected through corresponding connecting plates. The pusher plate 8-2 is vertically arranged along the front-rear direction. The pusher plate 8-2 is fixedly connected to the piston rod of the cylinder of the pusher plate driving device 8-4, and the pusher plate 8-2 is fixedly connected to the left ends of the cylindrical guide rails 8-5a of the two sets of pusher plate guiding mechanisms 8-5, so that the pusher plate 8-2 is driven by the cylinder of the pusher plate driving device 8-4 to move left and right along the two sets of pusher plate guiding mechanisms 8-5. The discharge air pipe 8-3 is fixedly arranged above the pusher plate 8-2 along the front-rear direction. A group of air blowing holes 8-31 opening to the left are arranged along the axis of the discharge air pipe 8-3, and each air blowing hole 8-31 is arranged along the radial direction of the discharge air pipe 8-3, penetrating through the inner and outer walls of the left side wall of the discharge air pipe 8-3.

[0074] When the automatic overlocking machine of the present invention is working: the long cloth to be sewn is placed on the main table 2-1, and its front end in the feeding direction (i.e., the left end of the cloth) is located below the second photoelectric sensor 45-2. At this time, the second photoelectric sensor 45-2 can detect the cloth below, and the device is in a working state. The corresponding part of the rear front end of the cloth is attached to the positioning guide surface of the positioning support plate 46. At this time, the first photoelectric sensor 45-1 can detect the cloth below. Then the machine is turned on, and the cloth enters the overlocking machine head 3 for overlocking. During sewing: 1. When the first photoelectric sensor 45-1 cannot detect the fabric below (that is, the rear edge of the fabric is in front of the vertical plane where the positioning guide surface of the positioning support plate 46 is located, but not in the vertical plane), the roller adjustment assembly 44 drives the material removal roller 42 downward to press the fabric against the head plate 2-4. At this time, the fabric continues to move to the left for sewing. Due to the rolling guidance of the material removal roller 42, the fabric is pulled backward, and the rear edge of the fabric moves backward to remain in contact with the positioning guide surface of the positioning support plate 46. When the first photoelectric sensor 45-1 detects that there is fabric below, the roller adjustment assembly 44 drives the material removal roller 42 to lift upward, and the fabric is not affected and moves to the left for sewing. The excess part is guided forward by the guide arc surface 41-11 of the material guide seat 41-1, and the rear edge of the fabric moves forward to remain in contact with the positioning guide surface of the positioning support plate 46. 2. When the bone position on the cloth (some cloth is made of two pieces of cloth spliced ​​and sewn, and the sewn joint usually has three or more layers of cloth thickness, and the joint is usually called the bone position in the industry) passes through the bone position guide block 5-1 of the bone position detection device 5, due to the increase in cloth thickness, the bone position guide block 5-1 is lifted to the upper left, so that the detection plate part 5-21 on the bone position rotating arm 5-2 moves to the right away from the proximity switch 5-5, so that the proximity switch 5-5 cannot detect the detection plate part 5-21 of the bone position rotating arm 5-2, and therefore it is judged that the bone position has passed. At this time, the lifting seat driving cylinder 41-4 drives the lifting seat 41-3 to move upward, thereby driving the feeding presser foot 43 to rise upward, so as to facilitate the bone position to pass. 3. When the second photoelectric sensor 45-2 cannot detect the fabric below, the first pressure head 6-2 of the first auxiliary discharging device 6 presses the fabric downward and moves to the left synchronously with the fabric; at this time, according to the position of the needle of the overlocking machine head 3 from the second photoelectric sensor 45-2 and the sewing speed, the sewing stops after a corresponding time (that is, the sewing is completed), and then the thread cutting device of the overlocking machine head 3 cuts the thread. When the sewing is completed, the left end of the fabric is located between the feeding rod 8-11 and the pushing plate 8-2 of the receiving frame 8-1, and the pushing plate driving device 8-4 drives the pushing plate 8-2 to clamp the fabric to the feeding rod 8-11 to the left, and then the first pressure head 6-2 of the first auxiliary discharging device 6 is lifted upward to release the fabric, and the unloading air pipe 8-3 blows air to the left, so that the upper part of the fabric bypasses the feeding rod 8-11 and rests on the feeding rod 8-11 to complete the material collection.4. When the sewn fabric is short, it is first fed by the first auxiliary discharging device 6. Then, the second pressing head 7-2 of the second auxiliary discharging device 7 presses down on the fabric, and the first pressing head 6-2 of the first auxiliary discharging device 6 lifts upward to release the fabric. The second auxiliary discharging device 7 sends the left end of the fabric to between the feeding rod 8-11 and the pushing plate 8-2 of the receiving rack 8-1. The pushing plate driving device 8-4 drives the pushing plate 8-2 to clamp and fix the fabric on the feeding rod 8-11 to the left. Then, the second pressing head 7-2 of the second auxiliary discharging device 7 lifts upward to release the fabric, and the discharging air pipe 8-3 blows air to the left, so that the upper part of the fabric bypasses the feeding rod 8-11 and then drapes over the feeding rod 8-11 to complete the material receiving.

[0075] In the specific embodiments described above, the purpose, technical solutions and beneficial effects of the present invention have been further described in detail. It should be understood that the above are only specific embodiments of the present invention and are not used to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An automatic hemming machine, comprising a frame, a working platform, and a hemming head; the working platform includes a main table board and a head table board; the main table board is fixedly arranged on the frame and is in a horizontal state; an opening penetrating through the upper and lower parts of the main table board and facing backward is provided in the left part of the main table board; the hemming head is fixedly arranged on the frame and is located in the head hole of the main table board; the head table board is detachably and fixedly arranged in the head hole of the main table board, cooperates with the hemming head, and covers the corresponding part of the hemming head; the upper surface of the head table board is flush with the upper surface of the main table board. It is characterized in that: It further includes a material scraping device; the material scraping device includes a mounting seat assembly, a material scraping roller, a feeding presser foot, a roller adjusting assembly, a detection assembly, and a positioning back plate; the mounting seat assembly is arranged on the head table board and is located on the right side of the hemming head; the mounting seat assembly includes a material guiding seat, a first adjusting handwheel of the material guiding seat, a lifting seat, a lifting seat driving cylinder, and a lifting seat adjusting handwheel; the material guiding seat is slidably arranged on the head table board in the front-rear direction; by rotating the first adjusting handwheel of the material guiding seat, the material guiding seat moves back and forth, changing its position in the front-rear direction on the head table board; the lifting seat is slidably arranged on the material guiding seat in the up-down direction and is driven by the lifting seat driving cylinder to move up and down; by rotating the lifting seat adjusting handwheel, the position of the lifting seat in the up-down direction is changed; the roller adjusting assembly is arranged on the mounting seat assembly; the roller adjusting assembly includes a roller adjusting arm and an adjusting arm driving cylinder; the roller adjusting arm is rotatably connected to the middle part of the front part of the lifting seat at its upper end on the right; the material scraping roller is rotatably arranged at the lower end of the left part of the roller adjusting arm, and the angle α between the plane passing through the axis of rotation of the material scraping roller and the vertical plane arranged in the left-right direction is greater than 45 degrees and less than 90 degrees; the left end of the roller adjusting arm is lifted or pressed down by the adjusting arm driving cylinder, and then the material scraping roller at the left end of the roller adjusting arm is lifted or pressed down; when the material scraping roller is pressed down, the fabric drives the material scraping roller to rotate, and at the same time the fabric is guided backward by the material scraping roller; the detection assembly is used to judge whether the material scraping roller needs to be lifted or pressed down, and the detection assembly includes a first photoelectric sensor and a second photoelectric sensor; the first photoelectric sensor is used to detect whether the rear edge of the fabric is in the vertical plane where the positioning guiding surface of the positioning back plate is located; the second photoelectric sensor is used to detect whether the fabric feeding is ended; the feeding presser foot is arranged on the mounting seat assembly, and its position in the up-down direction can be adjusted to ensure that the fabric is in a flat state when feeding.

2. The automatic hemming machine according to claim 1, It is characterized in that: The mounting base assembly further includes a lifting seat limit screw; the first adjusting handwheel of the material guiding seat is rotatably arranged on the headstock plate by its middle cylindrical part, and its rotation axis is arranged along the front-back direction. The material guiding seat is provided with a first screw hole with an opening facing backward and mating with the front screw part of the first adjusting handwheel of the material guiding seat. The screw of the first adjusting handwheel of the material guiding seat is screwed into the first screw hole of the material guiding seat, so that the material guiding seat moves back and forth by rotating the first adjusting handwheel of the material guiding seat, changing the position of the material guiding seat in the front-back direction on the headstock plate; the lifting seat adjusting handwheel is rotatably arranged in the material guiding seat by its lower cylindrical section, and its rotation axis is arranged along the up-down direction. The middle screw part of the lifting seat adjusting handwheel is screwed onto the lifting seat, so that the position of the lifting seat in the up-down direction is changed by rotating the lifting seat adjusting handwheel; the screw part of the lifting seat limit screw passes through the lifting seat from top to bottom and is then screwed onto the material guiding seat, limiting the lifting seat from above and restricting the rising height of the lifting seat.

3. The automatic edge binding machine according to claim 2, characterized in that: The feeding presser foot is horizontally and fixedly arranged on the lower front side of the lifting seat. The feeding presser foot is provided with an oval roller hole penetrating through its up and down; the roller hole is arranged with its left part inclined backward and its right part inclined forward; the stripping roller passes through the oval roller hole of the feeding presser foot downward and presses the fabric against the headstock plate.

4. The automatic edge binding machine according to claim 1, characterized in that: It further includes a bone position detection device; the bone position detection device is used to judge whether there is a bone position on the fabric that needs to pass through the feeding presser foot.

5. The automatic edge binding machine according to claim 4, characterized in that: The bone position detection device includes a bone position guiding block, a bone position rotating arm, a rotating arm torsion spring, a torsion spring adjusting handwheel and a proximity switch; the torsion spring adjusting handwheel is screwed onto the mounting base assembly of the stripping device by its rear screw part; its axis is arranged along the front-back direction; the bone position rotating arm is rotatably arranged on the middle cylindrical section of the torsion spring adjusting handwheel by its middle part, located on the front side of the lifting seat; its rotation axis is horizontally arranged along the front-back direction; the bone position guiding block is fixedly arranged on the lower end of the bone position rotating arm, and the lower part of the bone position guiding block is conical, and the lower end head of the cone is spherical; the upper end of the bone position rotating arm is provided with a detection plate part; the rotating arm torsion spring is sleeved on the middle cylindrical section of the torsion spring adjusting handwheel, located in front of the bone position rotating arm. One end of the rotating arm torsion spring is arranged on the upper end of the bone position rotating arm, and the other end is arranged in the handle of the torsion spring adjusting handwheel; the rotating arm torsion spring is used to make the upper end of the bone position rotating arm approach the proximity switch to the left, so that the bone position guiding block approaches the headstock plate downward; the proximity switch is fixedly arranged on the mounting base assembly of the stripping device, and the detection plate part at the upper end of the bone position rotating arm abuts against the proximity switch from right to left. The proximity switch is used to detect whether the detection plate part at the upper end of the bone position rotating arm rotates away from the proximity switch to the right.

6. The automatic edge binding machine according to any one of claims 1 to 5, characterized in that: It further includes a first auxiliary discharging device; the first auxiliary discharging device includes a first mounting base, a first pressing head, a first pressing head driving air cylinder, a first connecting seat, a first linear guide rail and a first pressing head pulling air cylinder; the first mounting base is fixedly arranged on the overlock sewing machine head, with its front part extending forward and located in front of the overlock sewing machine head; the first linear guide rail is horizontally fixedly arranged on the first mounting base along the left-right direction by its guide rail and is located on the right side of the cylinder body of the first pressing head pulling air cylinder; the first connecting seat is fixedly arranged on the slider of the first linear guide rail; the first connecting seat is driven by the first pressing head pulling air cylinder to move left and right along the first linear guide rail; the first pressing head driving air cylinder is fixedly arranged on the first connecting seat by its cylinder body, and its piston rod extends downward; the first pressing head is fixedly arranged on the lower end head of the piston rod of the first pressing head driving air cylinder.

7. The automatic overlock sewing machine according to claim 6, characterized in that: It further includes a second auxiliary discharging device; the second auxiliary discharging device includes a second mounting frame, a second pressing head, a second pressing head driving air cylinder, a second connecting seat, a second linear guide rail and a second pressing head pulling air cylinder; the second mounting frame is fixedly arranged on the upper left part of the main table board of the working platform and is located on the left side of the first auxiliary discharging device; the second linear guide rail is fixedly arranged on the second mounting frame along the left-right direction by its guide rail, and the second connecting seat is fixedly arranged on the slider of the second linear guide rail; the second pressing head driving air cylinder is fixedly arranged on the second connecting seat along the up-down direction by its cylinder body, and its piston rod extends downward; the second pressing head is fixedly arranged on the lower end head of the piston rod of the second pressing head driving air cylinder; the second connecting seat is driven by the second pressing head pulling air cylinder to move left and right along the second linear guide rail.

8. The automatic overlock sewing machine according to any one of claims 1 to 5, characterized in that: It further includes a material collecting device, and the material collecting device is used for collecting and placing the sewn fabrics.

9. The automatic overlock sewing machine according to any one of claims 1 to 5, characterized in that: The working platform further includes an adjusting table board; the distance of the sagging after the fabric sewing is completed can be adjusted through the adjusting table board.

10. The automatic overlock sewing machine according to claim 9, characterized in that: The front end of the adjusting table board is hinged and connected to the front part of the left discharging end of the main table board, and its rotating shaft is perpendicular to the main table board; an arc-shaped table board adjusting hole penetrating through the upper and lower parts is arranged at the rear part of the adjusting table board; the center of the table board adjusting hole is located on the rotating shaft at the front end of the adjusting table board, and the adjusting table board is fixedly connected to the main table board through a plum blossom handle and a corresponding nut; the screw rod of the plum blossom handle sequentially passes through the main table board and the table board adjusting hole of the adjusting table board from top to bottom and is screwed on the corresponding nut located on the lower side of the adjusting table board, so as to lock the position of the adjusting table board and fixedly connect it to the main table board.

Images