A hemming and seaming machine

Abstract

The utility model discloses a kind of edge folding cutting machines, including rack and the table top being set on rack, still include folding mechanism, adsorption mechanism, tablet extension mechanism, tablet jacking mechanism, material taking transfer mechanism and sewing main shaft mechanism;The folding mechanism is set on table top, and the bidirectional folding of fabric is realized by folding plate;The adsorption mechanism is set below table top, and fabric is fixed by air hole negative pressure adsorption;The tablet extension mechanism and tablet jacking mechanism are respectively set in table top side and below, and the local area of fabric is held by the cooperation of both;Material taking transfer mechanism is straddled between table top and sewing main shaft mechanism, for transferring folded fabric. The positioning, folding, transfer, sewing and other key processes of fabric are integrated on a device, realize the continuous automatic operation from laying to sewing forming, greatly reduce manual intervention. Each mechanism is cooperated by time sequence and space, ensure that process connection is smooth, improve processing efficiency and folding accuracy.

Description

Technical Field

[0001] This utility model relates to the field of automation technology of tailoring machinery, specifically to a hemming tailoring machine. Background Technology

[0002] In the production of clothing and home textiles, hemming is a high-frequency process (such as cuffs, trouser hems, and binding). Traditional processes rely on manual labor for fabric laying, folding, positioning, transfer, and sewing, which has the following drawbacks:

[0003] 1. Inefficient: Manual hemming requires repeated adjustments to the fabric position, taking more than 30 seconds per piece, resulting in high labor costs during mass production;

[0004] 2. Unstable precision: Manual folding is prone to problems such as inconsistent fold width and skewed edges, which affects the finished product qualification rate;

[0005] 3. Disruptions in process connections: Existing semi-automatic equipment can only perform a single function (such as folding or sewing), requiring multiple machines to work together, and the fabric needs to be transferred manually, resulting in a long production line and a high failure rate;

[0006] 4. Difficulty in implementing complex folding processes: There is a lack of flexible control over asymmetrical folding or processes that require step-by-step folding.

[0007] Therefore, there is an urgent need for a fully automated device that integrates positioning, folding, transfer, and sewing to solve the problem of fragmented processes. Utility Model Content

[0008] To address the shortcomings of existing technologies, this utility model provides a hemming sewing machine that achieves full automation of the entire process of material laying, positioning, folding, pressing, transferring, and sewing through the coordinated operation of multiple mechanisms controlled by time sequence.

[0009] To achieve the above objectives, this utility model provides the following technical solution:

[0010] A hemming sewing machine includes a frame and a table mounted on the frame, and further includes a folding mechanism, an adsorption mechanism, a pressure plate extension mechanism, a pressure plate lifting mechanism, a material handling and transfer mechanism, and a sewing spindle mechanism. The folding mechanism is mounted on the table and achieves bidirectional folding of the fabric through a folding plate. The adsorption mechanism is located below the table and uses negative pressure through air vents to adsorb and fix the fabric. The pressure plate extension mechanism and the pressure plate lifting mechanism are respectively located on the side and below the table, and the two work together to press and hold a local area of ​​the fabric. The material handling and transfer mechanism spans between the table and the sewing spindle mechanism and is used to transfer the folded fabric. The folding mechanism, adsorption mechanism, pressure plate extension mechanism, pressure plate lifting mechanism, and material handling and transfer mechanism are coordinated through timing control and spatial layout to form a continuous automated processing of fabric positioning, folding, and transfer to sewing.

[0011] Furthermore, the folding mechanism includes: a front folding plate and a rear folding plate symmetrically arranged on the table; a front folding plate driving device for driving the front folding plate to move in the direction of the rear folding plate; and a rear folding plate driving device for driving the rear folding plate to move in the direction of the front folding plate.

[0012] Furthermore, the folding mechanism also includes: a linear slide rail on which a slider is movably connected; and a connecting block connected to both the output end of the drive device and the slider, so that the folding plate remains horizontally movable.

[0013] Furthermore, the adsorption mechanism includes: a vacuum pump, which can switch to generate negative pressure airflow or positive pressure airflow, where negative pressure airflow causes the pores to adsorb the fabric, and positive pressure airflow causes the pores to blow the fabric away; a pneumatic connector disposed under the table surface, which has a pneumatic cavity inside, and the pneumatic cavity is connected to the vacuum pump through a pipe; and several pores disposed on the table surface and connected to the pneumatic cavity.

[0014] Furthermore, the tablet extension mechanism is located on one side of the table surface, and includes a tablet and a tablet driving device for driving it to move back and forth; the tablet lifting mechanism is located under the table surface, and includes a push rod and a lifting driving device for driving it to move up and down, wherein the upper end of the push rod passes through the pneumatic connector and the table surface in sequence and maintains contact with the lower surface of the tablet.

[0015] Furthermore, the material handling and transfer mechanism includes: a transverse module, fixedly mounted on the frame; a material handling body, movably connected to the transverse module; and a pressing fixture, connected to the material handling body via a pressing drive device; the pressing fixture has a long, through-type sewing groove along its length.

[0016] Furthermore, the push rod remains in the lifted state in the initial position, so that the pressure plate and the table surface are kept at a distance.

[0017] Furthermore, the moving paths of the front folding plate and the rear folding plate are parallel to each other, and both are at a height from the table surface greater than the pressing height of the pressing plate.

[0018] Furthermore, the distribution area of ​​the plurality of air holes is smaller than the fabric area and is located in the center area of ​​the table surface between the front folding plate and the rear folding plate.

[0019] Furthermore, when the fabric is laid flat, it covers the air hole area, and the area covered on the rear folding plate is larger than the area covered on the front folding plate; when the fabric is blown up, the part pressed down by the pressure plate remains fixed, and the part not pressed up is raised for folding.

[0020] Compared with existing technologies, this patented technical solution has the following advantages: it integrates a complete process chain of adsorption positioning, pressing and fixing, bidirectional folding, pressing and transferring, and sewing preparation, significantly reducing manual intervention and improving production efficiency. The mechanism's movement sequence and spatial avoidance are strictly matched to ensure zero-interference operation of complex motion sequences. The front and rear folding plates can move independently in opposite directions, enabling simultaneous or step-by-step folding of both ends of the same fabric, significantly improving folding efficiency. Simultaneously, independent drive allows control over the folding sequence and amplitude, providing flexibility for complex folding processes. The integrated design of the material picking mechanism—pressing, dragging, and groove guidance—ensures the folded fabric reaches the sewing station in a stable shape and with preset seam positions, solving the pain point of needing to re-align after transfer in traditional equipment. Attached Figure Description

[0021] Figure 1 The diagram shown is a schematic representation of the overall structure of the hemming sewing machine of this utility model.

[0022] Figure 2 The diagram shown is a schematic representation of the overall structure of the hemming sewing machine of this utility model.

[0023] Figure 3 The diagram shown is a schematic representation of the overall structure of the hemming sewing machine of this utility model.

[0024] Figure 4 The diagram shown is a top view of the hemming sewing machine of this utility model.

[0025] Figure 5 As shown Figure 1 A magnified view of AA in the image;

[0026] Figure 6 As shown Figure 2 A magnified view of BB in the image;

[0027] Figure 7 As shown Figure 3 A magnified view of the CC area in the image;

[0028] Figure 8 The diagram shown is a schematic of the material handling and transfer mechanism.

[0029] In the diagram: 1. Frame; 2. Folding mechanism; 3. Adsorption mechanism; 4. Pressing plate extension mechanism; 5. Pressing plate lifting mechanism; 6. Material handling and transfer mechanism; 7. Sewing spindle mechanism; 8. Tabletop; 21. Front folding plate; 22. Rear folding plate; 23. Front folding plate drive device; 24. Rear folding plate drive device; 25. Linear slide rail; 26. Slider; 27. Connecting block; 28. Connecting seat; 29. ​​Air blowing pipe; 31. Pneumatic connector; 32. Air hole; 33. Pipe; 41. Pressing plate; 42. Pressing plate drive device; 43. Slider seat; 44. Lead screw; 51. Top rod; 52. Lifting drive device; 61. Lateral movement module; 62. Material handling body; 63. Lowering fixture; 64. Lowering connecting plate; 311. Pneumatic cavity; 631. Cutting groove. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] See Figure 1-8 As shown, this embodiment provides a hemming sewing machine, including a frame 1 and a table 8, a folding mechanism 2, an adsorption mechanism 3, a pressure plate extension mechanism 4, a pressure plate lifting mechanism 5, a material handling and transfer mechanism 6, and a sewing spindle mechanism 7, all mounted on the frame 1. The folding mechanism 2 is mounted on the table 8 and is used to achieve bidirectional folding of the fabric. The adsorption mechanism 3 is located below the table 8 and is used to fix the fabric by adsorbing it with negative pressure. The pressure plate extension mechanism 4 and the pressure plate lifting mechanism 5 are respectively located on the side and below the table 8 to help hold local areas of the fabric. The material handling and transfer mechanism 6 spans between the table 8 and the sewing spindle mechanism 7 and is used to transfer the folded fabric. By integrating key processes such as fabric positioning, folding, transfer, and sewing into one machine, continuous automated operation from fabric laying to sewing completion is achieved, significantly reducing manual intervention. The timing and spatial coordination of each mechanism ensures smooth process connection, improving processing efficiency and folding accuracy.

[0032] See Figures 1 to 6As shown, the folding mechanism 2 includes a front folding plate 21 and a rear folding plate 22 symmetrically arranged on the table surface 8. Specifically, the front folding plate 21 and the rear folding plate 22 are connected to the output end of the driving device via a connecting seat 28. The front folding plate driving device 23 drives the front folding plate 21 to move towards the rear folding plate 22. The rear folding plate driving device 24 drives the rear folding plate 22 to move towards the front folding plate 21. The upper surface of the rear folding plate 22 is provided with an air blowing pipe 29, and several air holes are spaced apart along its length on the outer side of the air blowing pipe 29, with the air holes facing towards the front folding plate 21. The air blowing pipe 29 is connected to an external air source device. The front and rear folding plates can move independently towards each other, realizing simultaneous or step-by-step folding of both ends of the same fabric, significantly improving folding efficiency. Simultaneously, independent driving allows control of the folding sequence and amplitude, providing flexibility for complex folding processes. The folding mechanism 2 also includes: a linear slide rail 25, on which a slider 26 is movably connected; and a connecting block 27, which is connected to both the output end of the drive device and the slider 26, keeping the folded plate moving horizontally. The slide rail and slider mechanism ensures that the folded plate moves along a strictly straight trajectory, avoiding deviation or tilting, and guaranteeing the straightness and positional accuracy of the folded edges. The aforementioned front folding plate drive device 23 and rear folding plate drive device 24 can be either cylinders or servo motors.

[0033] See Figure 1 , Figure 6 As shown, the adsorption mechanism 3 includes: a vacuum pump; a pneumatic connector 31 disposed under the tabletop 8, which has a pneumatic cavity 311 inside, and the pneumatic cavity 311 is connected to the vacuum pump through a pipe 33; and several air holes 32, which are opened on the tabletop 8 and connected to the pneumatic cavity 311. The vacuum pump generates a negative pressure environment in the pneumatic cavity 311, forming several air holes 32 on the tabletop 8 to adsorb the fabric, thereby positioning the fabric on the tabletop 8 and preventing it from shifting.

[0034] The tablet pressing extension mechanism 4 is located on the right side of the table 8. It includes a tablet pressing 41 and a tablet pressing drive device 42 that drives it to move back and forth. The tablet pressing 41 is located on the slider seat 43, and the tablet pressing drive device 42 drives the slider seat 43 to move back and forth along the screw 44.

[0035] See Figure 3 , Figure 7As shown, the pressing sheet lifting mechanism 5 is located under the table surface 8. It includes a lifting rod 51 and a lifting drive device 52 that drives the rod to move up and down. The lower end of the lifting rod 51 is located at the output end of the lifting drive device 52, and its upper end passes through the pneumatic connector 31 and the table surface 8 in sequence, used to lift or release the pressing sheet 41. The lifting drive device 52 is located below the pneumatic connector 31. After the pressing sheet 41 extends to cover the target area, the lifting rod 51 moves down to press down on the key parts of the fabric, forming a reliable local fixing point, providing a basis for subsequent blowing and folding. In the initial state, the lifting rod 51 lifts the pressing sheet 41 to maintain a distance from the table surface 8, ensuring that the pressing sheet 41 will not scratch or push the fabric during the insertion / extraction process, protecting the fabric and ensuring positioning accuracy. The pressing sheet drive device 42 and the lifting drive device 52 can be either cylinders or servo motors.

[0036] See Figures 1 to 4 and Figure 8 As shown, the material handling and transfer mechanism 6 includes: a transverse module 61, fixedly mounted on the frame 1; a material handling body 62, movably connected to the transverse module 61; and a pressing fixture 63, connected to the material handling body 62 via a pressing drive device. The pressing drive device is a cylinder, with the cylinder portion fixed to the material handling body 62 and its telescopic output end connected to a pressing connecting plate 64. The pressing fixture 63 is detachably connected to the pressing connecting plate 64 to facilitate replacement with different types of fixtures as needed. The pressing fixture 63 has a long, through-type cutting groove 631 along its length. The pressing fixture 63 presses the folded fabric onto the worktable while simultaneously transferring it, preventing the folds from loosening during the transfer process. It should be noted that only appropriate pressure is applied to simultaneously drag the fabric to the next process step, rather than completely compacting it. The sewing groove 631 on the pressure fixture 63 provides a sewing path, allowing the folded fabric to reach the sewing station in a stable shape and with preset seam positions, thus solving the problem of needing to realign after the transfer of traditional equipment.

[0037] The push rod 51 remains in the raised position in the initial position, maintaining a distance between the pressure plate 41 and the table surface 8 to prevent pushing the fabric during movement. The pressure plate 41 is always in the raised state before moving into the working position, completely eliminating the risk of interfering with or pushing the positioned fabric on its movement path.

[0038] The moving paths of the front folding plate 21 and the rear folding plate 22 are parallel to each other, and the height of both of them from the table surface 8 at their initial positions is greater than the pressing height of the pressure plate 41. The height design of the folding plates before the folding action and during the reset process ensures that they can smoothly pass over the already positioned pressure plate 41, avoiding interference between the mechanisms and ensuring the reliability of complex action sequences.

[0039] The distribution area of ​​several air holes 32 is smaller than the fabric area and is located in the center area of ​​the table surface between the front folding plate 21 and the rear folding plate 22. The air holes 32 ensure that the center of the fabric is stably attracted, providing a basis for subsequent folding. The edges of the fabric extend beyond the air hole area and cover the folding plates, providing the front / rear folding plates with an operating surface that directly acts on the fabric.

[0040] When the fabric is laid flat, it covers the area of ​​the air holes 32, and the area of ​​the folding plate 22 after coverage is larger than that of the front folding plate 21. When the fabric is blown up, the part pressed down by the pressure plate 41 remains fixed, while the part not pressed up is raised for folding. When air is blown up, only the part of the fabric not pressed down by the pressure plate, which is covered by the folding plate, can be effectively raised, forming a natural slope, which greatly facilitates the folding plate to fold it smoothly, improving the folding smoothness and shaping effect. The differentiated coverage area design supports the realization of asymmetrical folding technology, such as different front and rear folding margins.

[0041] Working principle: A single piece of fabric is laid flat on the perforated area of ​​the table 8. It should be noted that the area of ​​the fabric is larger than the area of ​​the perforated area; therefore, part of the fabric lies flat on the upper surfaces of the front folding plate 21 and the rear folding plate 22. After the fabric is laid flat, the vacuum pump generates a negative pressure airflow, and the perforated area 32 adsorbs the fabric onto the table 8 under negative pressure. The pressing plate extension mechanism 4 moves forward, causing the pressing plate 41 to move above the fabric. It should be noted that the push rod 51 continuously lifts the pressing plate 41, creating a certain distance between the pressing plate 41 and the table surface to prevent it from pushing the fabric during forward movement. Once the pressing plate 41 is above the fabric, the lifting drive device 52 drives the push rod 51 downward, at which point the pressing plate 41 presses down on the fabric. The front folding plate drive device 23 drives the front folding plate 21 to move towards the rear folding plate 22, folding part of the fabric laid flat on its upper surface onto the pressure plate 41. Simultaneously, the air blowing pipe 29 blows up part of the fabric laid flat on the upper surface of the rear folding plate 22. Then, the rear folding plate drive device 24 drives the rear folding plate 22 to move towards the front folding plate 21, folding the fabric laid flat on its upper surface towards the front folding plate 21. It should be noted that, as mentioned above, after the fabric is laid flat, the area covering the rear folding plate 22 is larger than that of the front folding plate 21. Therefore, only the air blowing pipe 29 needs to be designed on the rear folding plate 22 to effectively lift the fabric portion on the rear folding plate 22, greatly facilitating its folding. After completing the above two folding steps, the pressing plate 41, the front folding plate 21, and the rear folding plate 22 retract and return to their initial state. It should be noted that the height of the front folding plate 21 and the rear folding plate 22 above the table surface is greater than the thickness of the pressing plate 41 to prevent collision with the pressing plate 41 during the folding process. In addition, the front folding plate 21 and the rear folding plate 22 move forward a small distance relative to each other, rather than passing over each other, i.e., they move closer to the air hole area of ​​the table surface 8. The transverse module 61 drives the material picking body 62 to move entirely above the fabric. The downward driving device drives the downward pressing fixture 63 to move down and press the folded fabric onto the table surface. At the same time, the transverse module 61 drives the material picking body 62 to move entirely towards the sewing spindle mechanism 7, forming a pressing and transfer of the fabric at the same time. The sewing needle follows the seam groove 631 to complete the sewing and enter the next cycle.

Claims

1. A hemming sewing machine, comprising a frame (1) and a table (8) disposed on the frame (1), characterized in that, It also includes a folding mechanism (2), an adsorption mechanism (3), a pressing plate extension mechanism (4), a pressing plate lifting mechanism (5), a material handling and transfer mechanism (6), and a sewing spindle mechanism (7); the folding mechanism (2) is set on the table (8) and forms a bidirectional fold of the fabric through the folding plate; the adsorption mechanism (3) is set below the table (8) and adsorbs and fixes the fabric through negative pressure air holes; the pressing plate extension mechanism (4) and the pressing plate lifting mechanism (5) are respectively set on the side and below the table (8), and the two work together to press and hold a local area of ​​the fabric; the material handling and transfer mechanism (6) is straddling the table (8) and the sewing spindle mechanism (7) to transfer the folded fabric; the folding mechanism (2), the adsorption mechanism (3), the pressing plate extension mechanism (4), the pressing plate lifting mechanism (5), and the material handling and transfer mechanism (6) are coordinated by timing control and spatial layout to form a continuous automated processing of fabric positioning, folding, and transfer to sewing.

2. The hemming sewing machine according to claim 1, characterized in that, The folding mechanism (2) includes: a front folding plate (21) and a rear folding plate (22) symmetrically arranged on the table surface (8); a front folding plate driving device (23) for driving the front folding plate (21) to move towards the rear folding plate (22); and a rear folding plate driving device (24) for driving the rear folding plate (22) to move towards the front folding plate (21); wherein, an air blowing pipe (29) is provided on the upper surface of the rear folding plate (22), and a plurality of air holes are spaced apart along its length on the outer side of the air blowing pipe (29), with the plurality of air holes facing towards the front folding plate (21), and the air blowing pipe (29) is connected to an external air source device.

3. The hemming sewing machine according to claim 2, characterized in that, The folding mechanism (2) further includes: a linear slide rail (25) on which a slider (26) is movably connected; and a connecting block (27) connected to both the output end of the drive device and the slider (26) to keep the folding plate moving horizontally.

4. The hemming sewing machine according to claim 1, characterized in that, The adsorption mechanism (3) includes: a vacuum pump; a pneumatic connector (31) disposed under the table (8), which has a pneumatic cavity (311) inside, the pneumatic cavity (311) being connected to the vacuum pump through a pipe (33); and a plurality of air holes (32) opened on the table (8) and connected to the pneumatic cavity (311).

5. The hemming sewing machine according to claim 4, characterized in that, The tablet extension mechanism (4) is located on one side of the table (8), and includes a tablet (41) and a tablet driving device (42) that drives it to move back and forth; the tablet lifting mechanism (5) is located under the table (8), and includes a top rod (51) and a lifting driving device (52) that drives it to move up and down. The upper end of the top rod (51) passes through the pneumatic connector (31) and the table (8) in sequence and keeps in contact with the lower surface of the tablet (41).

6. The hemming sewing machine according to claim 1, characterized in that, The material handling and transfer mechanism (6) includes: a transverse module (61) fixedly mounted on the frame (1); a material handling body (62) movably connected to the transverse module (61); and a pressing fixture (63) connected to the material handling body (62) via a pressing drive device. The pressing fixture (63) has a long strip-shaped through-type sewing groove (631) along its length.

7. The hemming sewing machine according to claim 5, characterized in that, The top rod (51) remains in the initial position, keeping the pressure plate (41) and the table surface (8) at a distance.

8. The hemming sewing machine according to claim 2, characterized in that, The moving paths of the front folding plate (21) and the rear folding plate (22) are parallel to each other, and both are at a height greater than the pressing height of the pressing plate (41) from the table surface.

9. The hemming sewing machine according to claim 4, characterized in that, The distribution area of ​​the plurality of air holes (32) is smaller than the fabric area and is located in the center area of ​​the table surface between the front fold plate (21) and the rear fold plate (22).

10. The hemming sewing machine according to claim 9, characterized in that, When the fabric is laid flat, it covers the area of ​​the air holes (32), and the area covered on the rear fold plate (22) is greater than the area covered on the front fold plate (21).

Images