A pre-attaching front gusset sewing mechanism

Abstract

The utility model discloses a kind of front stop mouth pull strip suture front auxiliary shaping lead-out sewing mechanism, it is related to sewing technical field, including support, guiding device and belt feeding device;Support is provided with left and right extension support pole;Limiting structure that support pole is provided with the limit of front stop mouth pull strip roll left and right movement;Guiding device includes integrally-formed fixed rod and stretch rod;Fixed rod is fixedly installed at the top of sewing machine and extends upwards;Stretch rod includes multiple front and rear arranged "S" hooks, and multiple "S" hooks are connected head to tail;Belt feeding device includes belt feeding frame and connecting rod.The cooperation of support, guiding device and belt feeding device, the effective guidance and shaping of front stop mouth pull strip before suture are realized, avoid the problems such as folding, bending that easily appear in traditional sewing mode, significantly improve the suture quality.Limiting groove can accurately position front stop mouth pull strip at the correct position in front of presser foot, ensure the position accuracy when suture, solve the problem of uneven consumption.

Description

Technical Field

[0001] This utility model relates to the field of sewing technology, and in particular to a front stop strip pre-sewing auxiliary shaping and guiding sewing mechanism. Background Technology

[0002] In garment production, the sewing quality of the front hem has a crucial impact on the overall appearance of the garment. Among these processes, sewing the drawstring at the front hem is a key step. However, traditional sewing methods are prone to problems such as pleats, bends, and uneven fabric allowance when handling the drawstring. These issues can lead to wavy, twisted, or unevenly tensioned drawstrings after sewing, severely affecting the smoothness of the garment's appearance.

[0003] Meanwhile, manually adjusting the stitching straps is not only time-consuming but also requires a high level of worker skill, making it prone to errors and affecting production efficiency and product quality. In mass production, the instability of manual operation makes it difficult to ensure consistent stitching results for the same garment, leading to inconsistent product quality, a high rework rate, and increased production costs and labor consumption. Utility Model Content

[0004] The purpose of this invention is to provide an auxiliary shaping and guiding sewing mechanism for the front stop strip before sewing. Through the coordinated action of the bracket, guide device and feed device, the front stop strip is effectively guided and shaped before sewing, avoiding problems such as folding and bending that are easy to occur in traditional sewing methods, and significantly improving the sewing quality.

[0005] To achieve the above objectives, this utility model provides a pre-sewing auxiliary shaping and guiding sewing mechanism for the front stop pull strip, including a bracket, a guiding device, and a feeding device; the bracket is fixed to the rear table of the sewing machine, and a left-right extending support rod is provided on it; the center hole of the front stop pull strip roll passes through the support rod and can rotate on the support rod; the support rod is provided with a limiting structure to restrict the left-right movement of the front stop pull strip roll; the guiding device includes an integrally formed fixing rod and a tensioning rod; the fixing rod is fixedly installed on the top of the sewing machine and extends upward; the tensioning rod includes multiple front-and-rear "S" hooks, the multiple "S" hooks being connected end to end; the front stop... The front stop pull is wound up and down between the "S" hooks and extends from its end; the feed device includes a feed frame set at the presser foot of the sewing machine and a connecting rod that fixes the feed frame to the sewing machine; the feed frame is provided with a limiting groove with an opening facing away from the presser foot, the limiting groove allowing the front stop pull to be engaged and supported at the bottom of the groove; the center hole of the front stop pull roll is limited and sleeved on the support rod, the front stop pull is pulled from the front stop pull roll into the guide device, wound between the "S" hooks and extends from its end, then enters the limiting groove from above, the front stop pull is engaged and supported at the bottom of the groove, and then enters the presser foot from below.

[0006] By adopting the above structure, the coordinated action of the bracket, guide device, and feed device effectively guides and shapes the front stop strip before sewing, avoiding problems such as folding and bending that are prone to occur in traditional sewing methods, and significantly improving sewing quality. The limiting groove can accurately position the front stop strip in the correct position in front of the presser foot, ensuring positional accuracy during sewing and solving the problem of uneven feed.

[0007] Preferably, the support, guide device, and feeding device are located in the same longitudinal plane. This structural arrangement ensures that the front stop bar maintains linear movement during conveying, avoiding twisting or folding caused by lateral offset.

[0008] Preferably, the free end of the foremost "S" hook is provided with an upwardly bent hook; the bent hook and the "S" hook form an anti-detachment groove with an opening facing the left or right. This structure effectively prevents the front stop bar from falling off the "S" hook, ensuring the stability of the conveying process.

[0009] Preferably, a check device is also provided between the bracket and the guide device; the check device includes a check groove fixed to the top of the sewing machine and extending back and forth; the width of the check groove is adapted to the width of the front stop strip; the front stop strip passes into the check groove and slides back and forth along the bottom of the groove; a check block inclined forward and downward is rotatably installed above the check groove; the check block abuts against the upper surface of the front stop strip; when the front stop strip moves forward, the check block rotates upward under the action of friction, and the front stop strip passes through the check block; when traction stops, the check block presses against the upper surface of the front stop strip to prevent the front stop strip from retracting due to stretching and springback. This structure ensures the stability of the tension of the front stop strip and improves the consistency of product dimensions.

[0010] Preferably, the bottom of the check block has a planar structure at the contact point with the front stop bar. This structure increases the contact area with the front stop bar, improves the check-off effect, and avoids damage to the surface of the front stop bar.

[0011] Preferably, pressure shafts are provided at both ends of the check groove; the pressure shafts and the bottom of the check groove form a limiting space for the front stop bar to pass through. This structure further restricts the vertical displacement of the bar, ensuring its smooth conveying.

[0012] Preferably, the front end of the check groove is provided with rearwardly extending correction claws on the left and right sides, which abut against the upper surface of the front stop bar. With this structure, when the front stop bar is folded, the correction claws can be inserted into the two layers of the folded front stop bar to unfold it and ensure that the front stop bar is flat.

[0013] Preferably, the correction claw includes a fixed end fixed to the wall of the check groove and a rearwardly extending pointed claw end; the bottom of the pointed claw end abuts against the upper surface of the front stop bar, and its front pointed tip is rounded. This structure ensures the correction effect while avoiding scratches on the surface of the bar.

[0014] Preferably, the support rod is provided with a downwardly curved bending groove; the two side walls of the bending groove form a limiting structure; the front stop pull rod is locked on the bottom of the groove. This structure prevents the front stop pull rod from moving left or right.

[0015] Preferably, the groove wall is inclined to the left or right. This structural design facilitates the installation and replacement of the front stop tie rod roll.

[0016] After adopting the above technical solution, the beneficial effects of this utility model are: This invention, a pre-sewing auxiliary shaping and guiding sewing mechanism for the front stop strip, solves the defects of existing technologies, such as folding, bending, positional misalignment, and unstable tension, that easily occur during front stop strip sewing. Through the coordinated action of a bracket, a guiding device, and a feeding device, this invention achieves effective guidance and shaping of the front stop strip before sewing, avoiding problems such as folding and bending that are prone to occur in traditional sewing methods, and significantly improving sewing quality. The limiting groove can accurately position the front stop strip in the correct position in front of the presser foot, ensuring positional accuracy during sewing and solving the problem of uneven feed. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a front stop pull strip pre-stitching auxiliary shaping and guiding sewing mechanism of this utility model; Figure 2 yes Figure 1 Side view; Figure 3 yes Figure 1 A magnified view of part A in the image; Figure 4 yes Figure 1 A magnified view of part B in the image; Figure 5 This is a structural diagram of the support rod; Figure 6 This is a schematic diagram of the check valve. Figure 7 yes Figure 6 A sectional view along the central axis.

[0018] In the diagram, 1. Bracket, 11. Fixing seat, 12. Column, 13. Fixing sleeve, 14. Support rod, 141. Bending groove, 2. Guide device, 21. Fixing rod, 22. Tensioning rod, 23. Hook, 3. Belt feeding device, 31. Belt feeding frame, 32. Connecting rod, 4. Front stop pull strip roll, 41. Front stop pull strip, 5. Check device, 51. Check groove, 511. Correction claw, 52. Check block, 53. Pressure shaft. Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings.

[0020] The orientations mentioned in this specification are based on the orientation of the front stop strip sewing auxiliary shaping and guiding sewing mechanism of this utility model when it is working normally. It does not limit the orientation during storage and transportation, and only represents the relative positional relationship, not the absolute positional relationship.

[0021] like Figure 1 , Figure 2 and Figure 3 As shown, a front stop strip pre-sewing auxiliary shaping and guiding sewing mechanism includes a bracket 1, a guide device 2, and a feeding device 3. All three are located in the same longitudinal plane to ensure that the front stop strip 41 maintains linear movement during transport, avoiding twisting or folding caused by lateral offset.

[0022] The bracket 1 is fixed to the rear table of the sewing machine and includes a fixed base 11 and a column 12 fixed to the fixed base 11 and extending upward. A fixed sleeve 13 is fixed on the column 12, and a support rod 14 extending to the left and right is provided on the fixed sleeve 13; the center hole of the front stop pull strip roll 4 passes through the support rod 14 and can rotate on the support rod 14; a limiting structure is provided on the support rod 14 to restrict the left and right movement of the front stop pull strip roll.

[0023] like Figure 1 and Figure 5 As shown, the support rod 14 is provided with a downwardly curved bending groove 141; the two side walls of the bending groove 141 form a limiting structure; the front stop pull rod roll 4 is stuck on the bottom of the groove, and the left and right ends of the front stop pull rod roll 4 are restricted by the groove walls of the bending groove 141, thereby preventing it from moving left and right. For ease of installation and replacement, the groove walls of the bending groove 141 are inclined to the left or right.

[0024] like Figure 1 , Figure 2 and Figure 4As shown, the guide device 2 includes an integrally formed fixing rod 21 and a tension rod 22. In this embodiment, the guide device 2 is integrally formed by bending steel wire. The fixing rod 21 is fixedly installed on the top of the sewing machine and extends upward; the tension rod 22 includes multiple "S" hooks arranged front and rear, with the multiple "S" hooks connected end to end; the front stop strip 41 is wrapped up and down between the "S" hooks and extends out from its end. The tension rod 22 structure composed of multiple "S" hooks causes the front stop strip 41 to be bent multiple times during the conveying process, realizing the pre-stretching and shaping of the front stop strip 41, effectively eliminating the internal stress of the front stop strip 41, and ensuring the flatness after sewing. Furthermore, the free end of the foremost "S" hook is provided with an upwardly bent hook 23; the hook 23 and the "S" hook form an anti-detachment groove with the opening facing the left or right, which can effectively prevent the front stop strip 41 from falling off the "S" hook and ensure the stability of the conveying process.

[0025] like Figure 1 , Figure 2 and Figure 3 As shown, the tape feeding device 3 includes a tape feeding frame 31 disposed at the presser foot position of the sewing machine and a connecting rod 32 that fixes the tape feeding frame 31 to the sewing machine. The tape feeding frame 31 is provided with a limiting groove with its opening facing away from the presser foot. The limiting groove allows the front stop strip 41 to be inserted and supported at the bottom of the groove. The limiting groove can accurately position the front stop strip 41 in the correct position in front of the presser foot, ensuring the positional accuracy during sewing and solving the problem of uneven tape feed.

[0026] Further improvements were made based on the above embodiments.

[0027] like Figure 1 , Figure 2 , Figure 6 and Figure 7 As shown, a check device 5 is also provided between the bracket 1 and the guide device 2; the check device 5 includes a check groove 51 fixed to the top of the sewing machine and extending back and forth; the width of the check groove 51 is adapted to the width of the front stop strip 41; the front stop strip 41 passes into the check groove 51 and slides back and forth along the bottom of the groove. A check block 52 inclined forward and downward is rotatably installed above the check groove 51, and in its natural state, the check block 52 abuts against the upper surface of the front stop strip 41.

[0028] The specific method is as follows: The top of the check groove 51 is fixed with mounting seats on the left and right sides, and the mounting seats can be welded to the top of the check groove 51; the two mounting seats are fixedly connected by a round shaft; a rotating sleeve is rotatably mounted on the round shaft; the rotating sleeve is fixed to the check block 52 by a connecting rod; the connecting rod is inclined to the front and lower part of the check groove 51.

[0029] The bottom of the check block 52 abuts against the upper surface of the front stop bar 41. When the front stop bar 41 moves forward, the check block 52 rotates upward under the action of friction, and the front stop bar 41 passes through the check block 52; when traction stops, the check block 52 presses against the upper surface of the front stop bar 41 to prevent the front stop bar 41 from retracting due to tension rebound. The check device 5 effectively prevents the front stop bar 41 from retracting when traction stops, ensuring the stability of the tension of the front stop bar 41 and improving the consistency of product dimensions.

[0030] Furthermore, the bottom of the check block 52 has a planar structure at the contact position with the front stop bar 41, which can increase the contact area with the front stop bar 41, improve the check effect, and at the same time avoid damage to the surface of the front stop bar 41.

[0031] Furthermore, pressure shafts 53 are respectively provided at the front and rear ends of the check groove 51; the pressure shafts 53 and the bottom of the check groove 51 form a limiting space for the front stop bar 41 to pass through. This further restricts the vertical displacement of the bar and ensures its flat conveying.

[0032] Furthermore, the front end of the check groove 51 is provided with rearward extending correction claws 511 on the left and right sides respectively, and the correction claws 511 abut against the upper surface of the front stop bar 41. When the front stop bar 41 is folded, the correction claws 511 can be inserted into the two layers of the folded front stop bar 41 to unfold it and ensure that the front stop bar 41 is flat.

[0033] Furthermore, the correction claw 511 includes a fixed end fixed to the wall of the check groove 51 and a rearwardly extending pointed claw end; the bottom of the pointed claw end abuts against the upper surface of the front stop bar, and its front pointed tip is rounded. This ensures the correction effect while avoiding scratching the surface of the bar.

[0034] The design of the correction claw 511 and the pressure shaft 53 further optimizes the conveying state of the front stop pull bar 41, ensuring that the front stop pull bar 41 remains flat throughout the process, reducing the need for manual adjustment and lowering the requirements for worker proficiency.

[0035] like Figure 1 , Figure 6 The working process of the front stop pull strip pre-sewing auxiliary shaping and guiding sewing mechanism of this utility model is as follows: The center hole of the stop bar roll 4 is fixed to the support rod 14, and the front stop bar 41 is pulled out from the front stop bar roll 4. The front stop bar roll 4 is first corrected by the position of the correction claw 511, and then passes sequentially through the space between the pressure shaft 53 at the rear end of the check groove 51 and the bottom of the groove, the space between the check block 52 and the bottom of the groove, and the space between the pressure shaft 53 at the front end of the check groove 51 and the bottom of the groove. When the front stop bar 41 moves forward, the check block 52 rotates upward under the action of friction, allowing the front stop bar 41 to pass; when the pulling stops, the check block 52 presses against the upper surface of the front stop bar 41 under the action of gravity to prevent it from retracting; when a small retraction occurs, the check block 52 will press the front stop bar 41 tightly against the bottom of the check groove 51 to prevent it from retracting. Subsequently, the front stop strip 41 enters the guide device 2 and wraps around the "S" hooks, achieving stretching and shaping through repeated bending, and finally extends out from its end. Finally, the front stop strip 41 enters the limiting groove from above, where it is snapped in and supported at the bottom of the groove, and then enters the presser foot from below, completing the final positioning before sewing.

[0036] This invention, through the coordinated action of the bracket 1, the guide device 2, and the feeding device 3, effectively guides and shapes the front stop strip before sewing, avoiding problems such as folding and bending that are prone to occur in traditional sewing methods, and significantly improving the sewing quality.

[0037] Of course, the above description is not intended to limit the present utility model, and the present utility model is not limited to the examples given above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present utility model should also fall within the protection scope of the present utility model.

Claims

1. A pre-stitching and shaping guide sewing mechanism for front stop strips, characterized in that: Includes support frame, guide device, and belt feeding device; The bracket is fixed to the rear table of the sewing machine, and a support rod extending to the left and right is provided on it; the center hole of the front stop pull strip roll passes through the support rod and can rotate on the support rod; the support rod is provided with a limiting structure to restrict the left and right movement of the front stop pull strip roll; The guiding device includes an integrally formed fixing rod and a tensioning rod; the fixing rod is fixedly installed on the top of the sewing machine and extends upward; the tensioning rod includes a plurality of front and rear arranged "S" hooks, the plurality of "S" hooks being connected end to end; the front stop pull strip is wrapped up and down between the "S" hooks and extends out from its end; The tape feeding device includes a tape feeding frame disposed at the presser foot position of the sewing machine and a connecting rod for fixing the tape feeding frame to the sewing machine; the tape feeding frame is provided with a limiting groove with an opening facing away from the presser foot, and the limiting groove allows the front stop strip to be inserted and supported at the bottom of the groove; The center hole of the front stop pull rod is limited and sleeved on the support rod. The front stop pull rod is pulled from the front stop pull rod roll into the guide device, wrapped around the "S" hook and extended from its end, and then enters the limiting groove from above. The front stop pull rod is inserted and supported at the bottom of the groove, and then enters the presser foot from below.

2. The auxiliary shaping and guiding sewing mechanism before front stop strip stitching according to claim 1, characterized in that: The bracket, guide device, and conveyor belt are located in the same longitudinal plane.

3. The auxiliary shaping and guiding sewing mechanism before front stop strip stitching according to claim 1, characterized in that: The free end of the foremost "S" hook is provided with an upwardly bent hook; the bent hook and the "S" hook together form an anti-detachment groove with an opening facing the left or right.

4. The auxiliary shaping and guiding sewing mechanism before front stop strip stitching according to claim 1, characterized in that: A check valve is also provided between the bracket and the guide device; The anti-return device includes an anti-return groove fixed to the top of the sewing machine and extending back and forth; the width of the anti-return groove is adapted to the width of the front stop bar; the front stop bar passes into the anti-return groove and slides back and forth along the bottom of the groove; A check block that tilts forward and downward is rotatably mounted above the check groove; the check block abuts against the upper surface of the front stop bar; When the front stop bar moves forward, the check block rotates upward under the action of friction, and the front stop bar passes through the check block; when traction stops, the check block presses against the upper surface of the front stop bar to prevent the front stop bar from retracting due to stretching and springback.

5. The auxiliary shaping and guiding sewing mechanism before front stop strip stitching according to claim 4, characterized in that: The bottom of the check block is in contact with the front stop bar in a planar structure.

6. The auxiliary shaping and guiding sewing mechanism before front stop strip stitching according to claim 4, characterized in that: The front and rear ends of the check groove are respectively provided with pressure shafts; the pressure shafts and the bottom of the check groove form a limiting space for the front stop bar to pass through.

7. The auxiliary shaping and guiding sewing mechanism before front stop strip stitching according to claim 6, characterized in that: The front end of the check groove is provided with rearward extending correction claws on the left and right sides respectively, and the correction claws abut against the upper surface of the front stop bar.

8. The auxiliary shaping and guiding sewing mechanism before front stop strip stitching according to claim 7, characterized in that: The correction claw includes a fixed end fixed to the wall of the check groove and a rearwardly extending pointed claw end; the bottom of the pointed claw end abuts against the upper surface of the front stop bar, and its front pointed tip is rounded.

9. The auxiliary shaping and guiding sewing mechanism before front stop strip stitching according to claim 1, characterized in that: The support rod is provided with a downwardly curved bending groove; the two side walls of the bending groove form the limiting structure; the front stop pull bar is coiled and clamped on the bottom of the groove.

10. The auxiliary shaping and guiding sewing mechanism before front stop strip stitching according to claim 9, characterized in that: The groove wall is inclined to the left or right.

Images