Automatic sewing equipment for guitar bag production

Abstract

The utility model relates to the field of guitar bag production technology, and specifically relates to an automatic sewing equipment for guitar bag production, which comprises a base, further comprises a sewing machine, a positioning and pressing mechanism and a sewing adjusting mechanism, and the mobile rolling pressure self-adapting smoothing completely eliminates fabric wrinkles, guarantees the flatness of sewing stitches, and the smoothing design of the smoothing roller takes into account full coverage and pressure adaptability, avoids the influence of residual wrinkles on stitch quality, the smoothing roller is first driven to descend by a lifting cylinder, tightly adheres to the surface of the guitar bag fabric on the base to ensure that there is no gap in initial contact, then the sliding frame and the smoothing roller are synchronously moved to the edge of the fabric by a driving motor, the smoothing roller freely rolls in the rotating frame through the rotating shaft, and the wrinkles from the middle to the edge of the fabric are flattened one by one, avoiding the problem that traditional fixed smoothing can only deal with local and edge wrinkles, and finally the smoothing roller moves to the edge of the fabric, is again moved downward to press and position, further compacts the edge wrinkles, and realizes comprehensive material without dead angle smoothing.

Description

Technical Field

[0001] This utility model relates to the field of guitar bag production technology, specifically to an automatic sewing device for guitar bag production. Background Technology

[0002] Guitar bags, as the core protective equipment for guitars, are made of a variety of materials, including canvas, nylon, thickened cotton and linen, and multi-layer composite fabrics. They also need to be adapted to the size requirements of guitars of different specifications. The sewing process requires extremely high standards for the smoothness, precision, and stability of the stitches. With the continuous improvement of product quality requirements in the musical instrument accessories industry and the popularization of small-batch, fast-response production, guitar bag production is gradually facing the challenge of routine sewing of multiple specifications and materials. Traditional sewing equipment can no longer meet the needs of efficient and high-quality production.

[0003] Existing automated sewing equipment for guitar bag production has the following shortcomings: 1. The smoothing mechanism of traditional guitar bag sewing equipment is mostly a fixed structure, which can only press and smooth a local area of ​​the fabric. It cannot cover the entire range from the center to the edge of the fabric, resulting in prominent edge wrinkles. This directly affects the smoothness of the subsequent sewing stitches. At the same time, the smoothing and clamping actions are independent of each other and require manual operation and control. This not only increases the number of operation steps, but also makes it easy for the fabric to not be clamped in time after smoothing, causing it to spring back and wrinkle, further reducing the sewing quality.

[0004] 2. Traditional equipment often relies on manual adjustment of the sewing machine's position, making it difficult to achieve precise and coordinated control in the longitudinal, lateral, and height directions. The adjustment error is relatively large, and the various adjustment dimensions interfere with each other, making it impossible to independently lock the reference position. This makes it difficult for the sewing machine needle to accurately align with the area to be sewn. Utility Model Content

[0005] The purpose of this invention is to provide an automatic sewing device for producing guitar cases.

[0006] To achieve this objective, the present invention adopts the following technical solution: An automatic sewing machine for guitar bag production is provided, including a base, a sewing machine, a positioning and pressing mechanism, and a sewing adjustment mechanism. The sewing machine is positioned above the base, and the positioning and pressing mechanism is mounted on the surface of the base. The positioning and pressing mechanism includes a sliding frame, a support plate, a lifting cylinder, a smoothing roller, and a pressing plate. There are four sets of sliding frames, all slidably connected in sliding grooves opened inside the base. There are two sets of support plates, each set fixed between two sets of sliding frames on the same side. The lifting cylinder is fixed to the surface of the support plate, the smoothing roller is positioned below the output end of the lifting cylinder, and the pressing plates are positioned on both sides of the smoothing roller. The pressing surface of the pressing plate is provided with anti-slip texture. The sewing adjustment mechanism is installed on the surface of the base. The sewing adjustment mechanism includes an adjustment frame one, a transverse lead screw, an adjustment frame two, and a lifting lead screw. The adjustment frame one is slidably connected to the surface of the base via a slide rail. The transverse lead screw is rotatably connected inside the adjustment frame one. The adjustment frame two is slidably connected to the inside of the adjustment frame one via a slide rail, and the adjustment frame two is threadedly connected to the transverse lead screw via a threaded seat. The lifting lead screw is rotatably connected to the inside of the adjustment frame two. The sewing machine is slidably connected to the inside of the adjustment frame two via a slide rail, and the sewing machine is threadedly connected to the lifting lead screw via a threaded seat.

[0007] Preferably, a support frame is fixed to the lower surface of the base, a drive motor is fixed to the lower surface of the support frame, a drive gear is fixed to the output shaft of the drive motor, and drive racks are centrally symmetrically meshed on both sides of the surface of the drive gear. The drive racks are slidably connected to the surface of the support frame, and push-pull plates are fixed to the opposite ends of the two sets of drive racks. The two sets of push-pull plates are respectively fixedly connected to the two sets of sliding frames on the same side, and the push-pull plates have clearance grooves inside that are adapted to the drive racks on the opposite side. Starting the drive motor can drive the drive gear to rotate, thereby driving the drive racks to move the push-pull plates relative to each other, which can drive the sliding frames to move along the slide rails on the surface of the support frame.

[0008] Preferably, the output end of the lifting cylinder is fixed with a lifting frame, the bottom of the lifting frame is provided with a rotating frame, the smoothing roller is rotatably connected to the inside of the rotating frame through a rotating shaft, the surface of the rotating frame is fixed with a push rack, the push rack is slidably connected in a push groove opened inside the lifting frame, a tension spring is fixed between the top of the push rack and the surface of the lifting frame, a push gear is meshed with the surface of the push rack, a limit strip is fixed on the side of the rotating frame surface near the push rack, and a limit groove adapted to the limit strip is opened inside the lifting frame.

[0009] Preferably, the positioning and clamping mechanism further includes a drive shaft, a clamping gear, a clamping rack, and a clamping seat. The drive shaft is fixed inside the push gear and is rotatably connected to the surface of the lifting frame via a bearing bracket. The clamping gear is fixed at the end of the drive shaft. The clamping rack is meshed with the surface of the clamping gear. The clamping seat is fixed at the bottom end of the clamping rack. A second limiting strip is fixed on the side of the surface of the clamping seat near the clamping rack. A second limiting groove adapted to the second limiting strip is provided inside the lifting frame.

[0010] Preferably, a positioning slide rod is fixed on the surface of the clamping plate. The positioning slide rod is slidably connected in a positioning rod groove opened inside the clamping seat. A spring is sleeved on the outside of the positioning slide rod, and the two ends of the spring are respectively fixed between the clamping seat and the clamping plate.

[0011] Preferably, the sewing adjustment mechanism further includes a longitudinal movement motor, a longitudinal movement gear, and a longitudinal movement rack. The longitudinal movement motor is fixed to the side surface of the adjustment frame one via the frame, the longitudinal movement gear is fixed to the output shaft of the longitudinal movement motor, and the longitudinal movement rack is fixed to the surface of the base. The longitudinal movement gear and the longitudinal movement rack are meshed and connected. Starting the longitudinal movement motor can drive the adjustment frame one to move longitudinally along the slide rail on the surface of the base through the longitudinal movement gear and the longitudinal movement rack.

[0012] Preferably, the sewing adjustment mechanism further includes a horizontal movement motor and a lifting motor. The horizontal movement motor is fixed on the surface of the first adjustment frame near the horizontal movement lead screw, and the output shaft of the horizontal movement motor is fixedly connected to the horizontal movement lead screw. The lifting motor is fixed on the top of the second adjustment frame near the lifting lead screw, and the output shaft of the lifting motor is fixedly connected to the lifting lead screw. The horizontal movement and lifting adjustment of the sewing machine are realized by driving the horizontal movement motor and the lifting motor.

[0013] The beneficial effects of this utility model are: 1. This utility model discloses an automatic sewing machine for guitar bag production. The machine features a moving, rolling, and pressure-adaptive smoothing mechanism that completely eliminates fabric wrinkles and ensures smooth sewing stitches. The smoothing roller's design balances full coverage with pressure adaptability, preventing residual wrinkles from affecting stitch quality. First, the smoothing roller is driven to descend by a lifting cylinder, ensuring close contact with the guitar bag fabric surface on the base without gaps. Then, the drive motor, drive gear, and drive rack work together to move the sliding frame and smoothing roller synchronously towards the fabric edge. The smoothing roller rolls freely within the rotating frame via a rotating shaft, smoothing out wrinkles from the center to the edge of the fabric one by one. This avoids the problem of traditional fixed smoothing methods that can only handle localized or edge wrinkles. Finally, after the smoothing roller reaches the fabric edge, it moves down again to press and position, further compacting the edge wrinkles and achieving smoothing of the entire material without any dead angles.

[0014] 2. This utility model discloses an automatic sewing device for guitar bag production. The smoothing and clamping actions are linked, and there is a double anti-displacement mechanism. The clamping is reliable and secure, ensuring sewing stability. The linkage design of smoothing-triggered clamping allows for immediate clamping after smoothing without additional operation. The clamping structure features adaptive pressure and anti-slip friction for double anti-displacement protection, completely solving the problem of fabric shifting during sewing. When the smoothing roller moves downwards and positions itself, pushing the top pusher rack to slide, the pressure seat and pressure plate descend synchronously until they are flush with the fabric edge. The entire process does not require separate activation of the clamping power; it is directly triggered by the smoothing action, reducing operational steps and... To avoid issues like fabric wrinkling due to improper clamping after smoothing, the second limiting strip on the clamping seat slides along the second limiting groove of the lifting frame, ensuring that the clamping plate moves only vertically downwards without any forward, backward, left, or right offset. This precisely aligns with the fabric edge, preventing misalignment that could result in the edge not being clamped or being clamped into non-sewing areas. Furthermore, the anti-slip texture on the clamping surface of the clamping plate significantly increases the coefficient of friction with the fabric. Even if the sewing machine moves and applies pressure to the fabric during sewing, friction can resist fabric slippage. Combined with the continuous pressure of the spring, this creates a dual anti-displacement system of pressure and friction, ensuring that the sewing stitches always align with the preset trajectory without deviation or skipped stitches.

[0015] 3. This utility model discloses an automatic sewing device for guitar bag production. Its three-dimensional adjustment is independently controllable, with high positioning accuracy, ensuring the precision of the guitar bag sewing stitches. The longitudinal, lateral, and height adjustments are all independently driven and do not interfere with each other, completely avoiding errors from manual adjustment. Longitudinal adjustment ensures that the first adjustment frame drives the sewing machine to move smoothly along the preset longitudinal trajectory, accurately locking the longitudinal reference. Lateral adjustment ensures that the second adjustment frame drives the sewing machine without lateral deviation, accurately aligning it with the lateral trajectory of the guitar bag fabric to be sewn. Height adjustment enables the sewing machine to rise and fall vertically, accurately adapting to the fabric thickness. All three-dimensional adjustments can accurately reach the preset position, ensuring that the sewing machine needle is always aligned with the area to be sewn, effectively reducing the problem of stitch deviation and misalignment in guitar bag sewing, and improving stitch consistency and sewing quality.

[0016] 4. The automatic sewing equipment for guitar bag production of this utility model uses motor drive to replace manual adjustment, which greatly improves the adjustment efficiency and reduces labor costs. All dimensions of adjustment are directly driven by the motor, eliminating the need for manual screw turning or manual pushing of the sewing machine, thus completely simplifying the adjustment process. Compared with traditional manual adjustment, it reduces the time cost of manual adjustment and the rate of operational errors. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments of the present invention will be briefly described below.

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2This is a schematic diagram of the positioning and pressing mechanism and the sewing adjustment mechanism of this utility model; Figure 3 This is a schematic diagram of the structure of the support frame and sliding frame of this utility model; Figure 4 This is a schematic diagram of the structure of the support plate and smoothing roller of this utility model; Figure 5 This is a schematic diagram of the structure of the smoothing roller and the pressing plate of this utility model; Figure 6 This is a schematic diagram of the sewing adjustment mechanism of this utility model; In the diagram: 1. Base; 2. Sewing machine; 3. Positioning and pressing mechanism; 4. Support frame; 5. Drive motor; 6. Drive gear; 7. Drive rack; 8. Push-pull plate; 9. Sliding frame; 10. Support plate; 11. Lifting cylinder; 12. Lifting frame; 13. Rotating frame; 14. Smoothing roller; 15. Push rack; 16. Tension spring; 17. Push gear; 18. Drive shaft; 19. Pressing gear; 20. Pressing rack; 21. Pressing seat; 22. Pressing plate; 23. Positioning slide rod; 24. Spring; 25. Sewing adjustment mechanism; 26. Adjustment frame one; 27. Longitudinal motor; 28. Longitudinal gear; 29. ​​Longitudinal rack; 30. Transverse motor; 31. Transverse lead screw; 32. Adjustment frame two; 33. Lifting motor; 34. Lifting lead screw. Detailed Implementation

[0019] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0020] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual images. They should not be construed as limiting the scope of this patent. To better illustrate the embodiments of the present invention, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product.

[0021] Reference Figures 1 to 6The diagram shows an automatic sewing machine for producing guitar cases, including a base 1, a sewing machine 2, a positioning and pressing mechanism 3, and a sewing adjustment mechanism 25. The sewing machine 2 is positioned above the base 1. The positioning and pressing mechanism 3 is mounted on the surface of the base 1 and includes a sliding frame 9, a support plate 10, a lifting cylinder 11, a smoothing roller 14, and a pressing plate 22. There are four sets of sliding frames 9, all slidably connected within sliding grooves inside the base 1. There are two sets of support plates 10, each set fixed between two sets of sliding frames 9 on the same side. The lifting cylinder 11 is fixed to the surface of the support plate 10. Roller 14 is positioned below the output end of lifting cylinder 11, and pressing plates 22 are positioned on both sides of smoothing roller 14. The pressing surface of pressing plate 22 is provided with anti-slip texture. Sewing adjustment mechanism 25 is mounted on the surface of base 1. Sewing adjustment mechanism 25 includes adjusting frame one 26, transverse lead screw 31, adjusting frame two 32, and lifting lead screw 34. Adjusting frame one 26 is slidably connected to the surface of base 1 via a slide rail. Transverse lead screw 31 is rotatably connected to the inside of adjusting frame one 26. Adjusting frame two 32 is slidably connected to the inside of adjusting frame one 26 via a slide rail, and adjusting frame two 32 is threaded to transverse lead screw 31 via a threaded seat. The lifting screw 34 is rotatably connected inside the adjusting frame 2 32. The sewing machine 2 is slidably connected inside the adjusting frame 2 32 via a slide rail, and the sewing machine 2 is threadedly connected to the lifting screw 34 via a threaded seat. Before starting the equipment, the longitudinal, transverse, and height three-dimensional positions of the sewing machine 2 need to be adjusted according to the sewing requirements of the guitar bag fabric through the sewing adjustment mechanism 25 to ensure that the sewing machine 2 is accurately aligned with the area to be sewn. The adjusting frame 1 26 moves longitudinally to determine the longitudinal reference position of the sewing machine 2. The longitudinal movement motor 27, which is fixed on the side surface of the adjusting frame 1 26, is started. The output shaft of the longitudinal movement motor 27 drives... The longitudinal shift gear 28 rotates synchronously. Since the longitudinal shift gear 28 is meshed with the longitudinal shift rack 29 fixed on the surface of the base 1, the rotational power is converted into the linear motion of the adjustment frame 26. The adjustment frame 26 slides smoothly along the surface of the base 1 via the bottom slide rail to achieve longitudinal translation. If the sewing machine 2 needs to move to the front end of the base 1, the longitudinal shift motor 27 rotates forward to drive the longitudinal shift gear 28 to roll forward along the longitudinal shift rack 29, thereby moving the adjustment frame 26 forward. If it needs to move backward, the longitudinal shift motor 27 rotates in reverse until the adjustment frame 26 drives the subsequent components to the preset longitudinal reference position, and then the longitudinal shift motor 27 is turned off.

[0022] Reference Figures 1 to 3A support frame 4 is fixed to the lower surface of the base 1, and a drive motor 5 is fixed to the lower surface of the support frame 4. A drive gear 6 is fixed to the output shaft of the drive motor 5. Drive racks 7 are centrally symmetrically meshed on both sides of the surface of the drive gear 6. The drive racks 7 are slidably connected to the surface of the support frame 4. Push-pull plates 8 are fixed to opposite ends of the two sets of drive racks 7. The two sets of push-pull plates 8 are respectively fixedly connected to two sets of sliding frames 9 on the same side. The push-pull plates 8 have recesses inside that are adapted to the drive racks 7 on the opposite side. The motor 5 drives the drive gear 6 to rotate, which in turn drives the drive rack 7 to move the push-pull plate 8 relative to each other. This causes the sliding frame 9 to move along the slide rail on the surface of the support frame 4. After the sewing machine 2 is positioned, the guitar bag fabric to be sewn is laid flat on the surface of the base 1. At this time, the two sets of smoothing rollers 14 are positioned above the middle of the guitar bag fabric. The positioning and pressing mechanism 3 achieves the lateral positioning, smoothing, and pressing pretreatment of the fabric. The sliding frame 9 moves laterally to adapt to the width of the guitar bag fabric. After the guitar bag fabric is laid flat... The smoothing roller 14 descends to eliminate fabric wrinkles, activating the lifting cylinder 11 fixed to the surface of the support plate 10. The output shaft of the lifting cylinder 11 extends downward, driving the lifting frame 12 fixed at its output end to descend synchronously. The rotating frame 13 at the bottom of the lifting frame 12 and the smoothing roller 14 internally rotatably connected therein move downwards until the surface of the smoothing roller 14 is in close contact with the surface of the guitar bag fabric on the base 1. The descent of the output shaft of the lifting cylinder 11 stops, and then the drive motor 5 fixed to the lower surface of the support frame 4 is activated. The output shaft of the drive motor 5 drives the drive gear 6 to rotate synchronously. Two sets of drive racks 7 are centrally symmetrically meshed on both sides of the surface of the drive gear 6, and the drive racks 7 are slidably connected to the surface of the support frame 4. When the drive gear 6 rotates, the two sets of drive racks 7 move in opposite directions. Push-pull plates 8 are fixed to the opposite ends of the two sets of drive racks 7. The push-pull plates 8 have clearance grooves inside to avoid interference with the opposite drive racks 7. The two sets of push-pull plates 8 are fixedly connected to the two sets of sliding frames 9 on the same side, thereby driving the sliding frames 9 to separate synchronously in opposite directions.

[0023] Reference Figures 1 to 5A lifting frame 12 is fixed to the output end of the lifting cylinder 11. A rotating frame 13 is provided at the bottom of the lifting frame 12. The smoothing roller 14 is rotatably connected to the inside of the rotating frame 13 via a rotating shaft. A push rack 15 is fixed to the surface of the rotating frame 13. The push rack 15 is slidably connected to a push groove opened inside the lifting frame 12. A tension spring 16 is fixed between the top of the push rack 15 and the surface of the lifting frame 12. A push gear 17 is meshed with the surface of the push rack 15. A limit strip is fixed to the side of the rotating frame 13 near the push rack 15. A limit groove matching the limit strip is opened inside the lifting frame 12. By moving the sliding frame 9, the rotating frame 13 and the smoothing roller 14 can be driven to move synchronously. The smoothing roller 14 rotates freely inside the rotating frame 13 via a rotating shaft. As the rotating frame 13 moves, the smoothing roller... 14 can roll and smooth the surface of the fabric. After the smoothing roller 14 moves and smooths the edge of the guitar bag fabric, the drive motor 5 is turned off, and the lifting cylinder 11 is restarted to continue driving the lifting frame 12 to move down. At this time, under continuous downward pressure, the smoothing roller 14 will press tightly against the edge surface of the guitar bag fabric to complete the positioning. At the same time, the smoothing roller 14 is subjected to the opposite force of the guitar bag fabric and the base 1, which will force the rotating frame 13 and the lifting frame 12 to move relative to each other. Then, the push rack 15 fixed on the surface of the rotating frame 13 will slide along the push groove inside the lifting frame 12, thereby stretching the tension spring 16 to deform and generate elasticity. During the process, the limiting strip on the surface of the rotating frame 13 slides along the limiting groove inside the lifting frame 12 to ensure that the rotating frame 13 only moves in the vertical direction and does not shift to the left or right, ensuring a uniform smoothing effect.

[0024] Reference Figures 4 to 5The positioning and clamping mechanism 3 also includes a drive shaft 18, a clamping gear 19, a clamping rack 20, and a clamping seat 21. The drive shaft 18 is fixed inside the push gear 17 and is rotatably connected to the surface of the lifting frame 12 via a bearing bracket. The clamping gear 19 is fixed at the end of the drive shaft 18. The clamping rack 20 is meshed with the surface of the clamping gear 19. The clamping seat 21 is fixed at the bottom end of the clamping rack 20. A limit strip is fixed on the side of the surface of the clamping seat 21 near the clamping rack 20. A limit groove is provided inside the lifting frame 12 to match the limit strip. As the push rack 15 moves, it can drive the push gear 17 meshing with it to rotate. A drive shaft 18 is fixed inside the wheel 17. The drive shaft 18 is rotatably connected to the surface of the lifting frame 12 through a bearing bracket, thereby driving the drive shaft 18 to rotate synchronously. The clamping gear 19 fixed at the end of the drive shaft 18 rotates accordingly. A clamping rack 20 is meshed with the surface of the clamping gear 19. The clamping rack 20 moves vertically downward as the clamping gear 19 rotates. A clamping seat 21 is fixed at the bottom of the clamping rack 20. The limiting strip 2 on the surface of the clamping seat 21 slides along the limiting groove 2 inside the lifting frame 12 to prevent the clamping seat 21 from shifting, thereby driving the clamping seat 21 to descend synchronously. The clamping plate 22 connected to the bottom of the clamping seat 21 moves downward accordingly until the surface of the clamping plate 22 is tightly attached to the two edges of the fabric.

[0025] Reference Figures 4 to 5 A positioning slide rod 23 is fixed to the surface of the pressing plate 22. The positioning slide rod 23 is slidably connected to the positioning rod groove opened inside the pressing seat 21. A spring 24 is sleeved on the outside of the positioning slide rod 23, and the two ends of the spring 24 are respectively fixed between the pressing seat 21 and the pressing plate 22. The positioning slide rod 23 fixed to the surface of the pressing plate 22 is slidably connected to the positioning rod groove inside the pressing seat 21. The spring 24 is sleeved on the outside of the positioning slide rod 23. The spring 24 can adaptively adjust the pressure of the pressing plate 22 on the fabric. If the fabric edge is thick, the spring 24 is compressed to avoid excessive pressure and damage to the fabric. If the fabric edge is thin, the spring 24 returns to its original position to ensure sufficient pressure and prevent the fabric from slipping. At the same time, the pressing surface of the pressing plate 22 is provided with anti-slip texture, which can increase the friction between the pressing plate and the fabric and further prevent the fabric edge from shifting during sewing.

[0026] Reference Figure 1 , Figure 6The sewing adjustment mechanism 25 also includes a longitudinal movement motor 27, a longitudinal movement gear 28, and a longitudinal movement rack 29. The longitudinal movement motor 27 is fixed to the side surface of the adjustment frame 26 via a frame. The longitudinal movement gear 28 is fixed to the output shaft of the longitudinal movement motor 27. The longitudinal movement rack 29 is fixed to the surface of the base 1, and the longitudinal movement gear 28 and the longitudinal movement rack 29 are meshed together. Starting the longitudinal movement motor 27 can drive the adjustment frame 26 to move longitudinally along the slide rail on the surface of the base 1 via the longitudinal movement gear 28 and the longitudinal movement rack 29. The adjustment frame 22 moves laterally, accurately aligning with the sewing path of the fabric. Starting the transverse movement motor 30 fixed to the surface of the adjustment frame 26, the output shaft of the transverse movement motor 30 directly drives the rotation of the adjustment frame 26. The transverse guide screw 31 inside the first frame 26 rotates synchronously. The second adjustment frame 32 is slidably connected to the inside of the first adjustment frame 26 through the bottom slide rail, and its back threaded seat is threadedly connected to the transverse guide screw 31. The rotational power of the transverse guide screw 31 is converted into the transverse linear motion of the second adjustment frame 32. When the transverse motor 30 rotates forward, the transverse guide screw 31 pushes the second adjustment frame 32 to move to one side of the first adjustment frame 26. When the transverse motor 30 rotates in reverse, the second adjustment frame 32 moves to the other side. During the process, the second adjustment frame 32 slides smoothly along the slide rail inside the first adjustment frame 26 without any left or right deviation, until the second adjustment frame 32 drives the sewing machine 2 to accurately align with the transverse trajectory to be sewn on the guitar bag fabric, and then the transverse motor 30 is turned off.

[0027] Reference Figure 1 , Figure 6 The sewing adjustment mechanism 25 also includes a horizontal movement motor 30 and a lifting motor 33. The horizontal movement motor 30 is fixed on the surface of the first adjustment frame 26 near the horizontal movement lead screw 31, and the output shaft of the horizontal movement motor 30 is fixedly connected to the horizontal movement lead screw 31. The lifting motor 33 is fixed on the top of the second adjustment frame 32 near the lifting lead screw 34, and the output shaft of the lifting motor 33 is fixedly connected to the lifting lead screw 34. The horizontal movement and lifting adjustment of the sewing machine 2 are achieved by driving the horizontal movement motor 30 and the lifting motor 33. When the sewing machine 2 is adjusted to fit the thickness of the guitar bag fabric, the lifting motor 33 fixed on the top of the second adjustment frame 32 is started. The output shaft of the lifting motor 33 drives the rotation of the adjustment frame 32. The internal lifting screw 34 rotates, and the sewing machine 2 is slidably connected to the inside of the adjustment frame 32 via the back slide rail. The back threaded seat is threadedly connected to the lifting screw 34. The rotational power of the lifting screw 34 is converted into the vertical lifting motion of the sewing machine 2. If the guitar bag fabric is thick, the lifting motor 33 rotates forward to drive the lifting screw 34 to rotate, causing the sewing machine 2 to move upward, increasing the distance between the needle of the sewing machine 2 and the surface of the base 1, and avoiding fabric jamming. If the fabric is thin, the lifting motor 33 rotates in reverse to drive the sewing machine 2 to move downward, ensuring that the needle can accurately pierce the fabric to complete the sewing, until the height of the sewing machine 2 needle is adapted to the fabric thickness. Then, the lifting motor 33 is turned off, and the initial position adjustment of the sewing machine 2 is completed.

[0028] After the fabric is positioned and pressed, the sewing machine 2 is started. Combined with the coordinated actions of various mechanisms, precise sewing of the guitar bag fabric is achieved. Once started, the needle of the sewing machine 2 moves up and down at a preset frequency, piercing the fabric to complete the stitching. Simultaneously, according to the sewing trajectory of the guitar bag, the longitudinal motor 27 and the transverse motor 30 are activated as needed to adjust the position of the sewing machine 2. If a longitudinal straight trajectory is required, the longitudinal motor 27 slowly rotates forward and reverse, driving the adjusting frame 26 and the sewing machine 2 to move smoothly along the longitudinal rack 29. The needle of the sewing machine 2 is always aligned with the trajectory. If a transverse straight trajectory is required, the transverse motor 30 slowly rotates forward and reverse, driving the adjusting frame 32 and the sewing machine 2 to move along the transverse lead screw 31. If a diagonal trajectory is required, the longitudinal motor 27 and the transverse motor 30 start synchronously, adjusting according to a preset speed ratio to achieve diagonal movement of the sewing machine 2 and precisely complete the trajectory sewing.

[0029] During the sewing process, the smoothing roller 14 remains in close contact with the fabric surface, and the pressure plates 22 on both sides are always pressed against the fabric edges by the elastic force of the springs 24. The anti-slip texture increases friction and prevents the fabric from shifting as the sewing machine 2 moves, ensuring that the sewing stitches are accurately aligned with the preset track without any deviation or skipped stitches. After sewing a single piece of guitar bag fabric, the sewing machine 2 is turned off, and the longitudinal motor 27, transverse motor 30, and lifting motor 33 are started in reverse, respectively driving the adjusting frame 1 26, adjusting frame 2 32, and sewing machine 2 back to their initial positions. The lifting cylinder is then activated. 11. The output shaft is retracted upwards, causing the lifting frame 12, rotating frame 13, and smoothing roller 14 to move upwards and detach from the fabric surface. At the same time, the lifting frame 12 rises, causing the push rack 15 to move upwards, the tension spring 16 to reset, and the push gear 17 to rotate in the opposite direction. Through the transmission shaft 18 and the pressing gear 19, the pressing rack 20 is driven upwards, which in turn causes the pressing seat 21 and pressing plate 22 to move upwards, releasing the fabric from pressure. The sewn guitar bag fabric is then manually removed, completing the entire sewing process and preparing for the next guitar bag fabric sewing operation.

[0030] The tension spring 16 and the limiting strip form a pressure self-adaptation and trajectory limiting. During the smoothing process, if there are slight thickness fluctuations on the fabric surface, the smoothing roller 14 is pushed upward by the reverse force, causing the top push rack 15 to slide along the top push groove of the lifting frame 12 and stretch the tension spring 16. The elastic force of the tension spring 16 acts in the opposite direction on the rotating frame 13, so that the smoothing roller 14 always sticks to the fabric surface. It will not detach from the fabric due to insufficient pressure, nor will it crush and deform the fabric due to excessive pressure. At the same time, the limiting strip slides along the limiting groove to ensure that the rotating frame 13 only makes vertical movements and does not shift to the left or right. This avoids the smoothing roller 14 from being misaligned, which may cause local missed smoothing or fabric scratching, and ensures that the smoothing effect of the entire fabric is uniform.

Claims

1. An automatic sewing machine for producing guitar cases, comprising a base (1), characterized in that: It also includes a sewing machine (2), a positioning and pressing mechanism (3), and a sewing adjustment mechanism (25). The sewing machine (2) is set above the base (1). The positioning and pressing mechanism (3) is installed on the surface of the base (1). The positioning and pressing mechanism (3) includes a sliding frame (9), a support plate (10), a lifting cylinder (11), a smoothing roller (14), and a pressing plate (22). There are four sets of sliding frames (9), all of which are slidably connected in the sliding grooves opened inside the base (1). There are two sets of support plates (10). Each set of support plates (10) is fixed between two sets of sliding frames (9) on the same side. The lifting cylinder (11) is fixed on the surface of the support plate (10). The smoothing roller (14) is set below the output end of the lifting cylinder (11). The pressing plate (22) is set on both sides of the smoothing roller (14). The pressing plate (22) presses... The surface is provided with anti-slip texture. The sewing adjustment mechanism (25) is installed on the surface of the base (1). The sewing adjustment mechanism (25) includes an adjustment frame one (26), a transverse lead screw (31), an adjustment frame two (32), and a lifting lead screw (34). The adjustment frame one (26) is slidably connected to the surface of the base (1) through a slide rail. The transverse lead screw (31) is rotatably connected to the inside of the adjustment frame one (26). The adjustment frame two (32) is slidably connected to the inside of the adjustment frame one (26) through a slide rail. The adjustment frame two (32) is threadedly connected to the transverse lead screw (31) through a threaded seat. The lifting lead screw (34) is rotatably connected to the inside of the adjustment frame two (32). The sewing machine (2) is slidably connected to the inside of the adjustment frame two (32) through a slide rail. The sewing machine (2) is threadedly connected to the lifting lead screw (34) through a threaded seat.

2. The automatic sewing equipment for producing guitar cases according to claim 1, characterized in that: A support frame (4) is fixed on the lower surface of the base (1), and a drive motor (5) is fixed on the lower surface of the support frame (4). A drive gear (6) is fixed on the output shaft of the drive motor (5). A drive rack (7) is connected to the two sides of the surface of the drive gear (6) in a centrally symmetrical meshing manner. The drive rack (7) is slidably connected to the surface of the support frame (4). Push-pull plates (8) are fixed on the opposite ends of the two sets of drive racks (7). The two sets of push-pull plates (8) are fixedly connected to the two sets of sliding frames (9) on the same side respectively. The push-pull plates (8) have a clearance groove inside that is compatible with the drive rack (7) on the opposite side. When the drive motor (5) is started, the drive gear (6) can be driven to rotate, thereby driving the drive rack (7) to drive the push-pull plate (8) to move relative to each other, which can drive the sliding frame (9) to move along the slide rail on the surface of the support frame (4).

3. The automatic sewing equipment for producing guitar cases according to claim 1, characterized in that: The output end of the lifting cylinder (11) is fixed with a lifting frame (12). The bottom of the lifting frame (12) is provided with a rotating frame (13). The smoothing roller (14) is rotatably connected to the inside of the rotating frame (13) via a rotating shaft. The surface of the rotating frame (13) is fixed with a push rack (15). The push rack (15) is slidably connected in the push groove opened inside the lifting frame (12). The top of the push rack (15) is fixed with a tension spring (16) between it and the surface of the lifting frame (12). The surface of the push rack (15) is meshed with a push gear (17). A limit strip is fixed on the side of the rotating frame (13) near the push rack (15). A limit groove that matches the limit strip is opened inside the lifting frame (12).

4. The automatic sewing equipment for producing guitar cases according to claim 3, characterized in that: The positioning and clamping mechanism (3) also includes a drive shaft (18), a clamping gear (19), a clamping rack (20), and a clamping seat (21). The drive shaft (18) is fixed inside the push gear (17), and the drive shaft (18) is rotatably connected to the surface of the lifting frame (12) through the bearing bracket. The clamping gear (19) is fixed at the end of the drive shaft (18). The clamping rack (20) is meshed with the surface of the clamping gear (19). The clamping seat (21) is fixed at the bottom end of the clamping rack (20). A limit strip is fixed on the side of the surface of the clamping seat (21) near the clamping rack (20). A limit groove that matches the limit strip is provided inside the lifting frame (12).

5. The automatic sewing equipment for producing guitar cases according to claim 4, characterized in that: A positioning slide rod (23) is fixed on the surface of the clamping plate (22). The positioning slide rod (23) is slidably connected in the positioning rod groove opened inside the clamping seat (21). A spring (24) is sleeved on the outside of the positioning slide rod (23), and the two ends of the spring (24) are respectively fixed between the clamping seat (21) and the clamping plate (22).

6. The automatic sewing equipment for producing guitar cases according to claim 1, characterized in that: The sewing adjustment mechanism (25) also includes a longitudinal motor (27), a longitudinal gear (28), and a longitudinal rack (29). The longitudinal motor (27) is fixed to the side surface of the adjustment frame (26) via the frame. The longitudinal gear (28) is fixed to the output shaft of the longitudinal motor (27). The longitudinal rack (29) is fixed to the surface of the base (1). The longitudinal gear (28) and the longitudinal rack (29) are meshed and connected. When the longitudinal motor (27) is started, the adjustment frame (26) can be driven to move longitudinally along the slide rail on the surface of the base (1) through the longitudinal gear (28) and the longitudinal rack (29).

7. The automatic sewing equipment for producing guitar cases according to claim 6, characterized in that: The sewing adjustment mechanism (25) also includes a transverse motor (30) and a lifting motor (33). The transverse motor (30) is fixed on the surface of the first adjustment frame (26) near the transverse lead screw (31), and the output shaft of the transverse motor (30) is fixedly connected to the transverse lead screw (31). The lifting motor (33) is fixed on the top of the second adjustment frame (32) near the lifting lead screw (34), and the output shaft of the lifting motor (33) is fixedly connected to the lifting lead screw (34). The transverse movement and lifting adjustment of the sewing machine (2) are achieved by driving the transverse motor (30) and the lifting motor (33).

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