Fabric tensioning device for embroidery machine

Abstract

The invention relates to the field of embroidery machines, and discloses a fabric tensioning device for an embroidery machine, the fabric tensioning device comprises a chassis and a support, the support is fastened at the edge of the upper surface of the chassis through bolts, an embroidery mechanism is arranged on the support, and a rotary feeding structure is arranged in the middle of the upper surface of the chassis; after one piece of fabric is embroidered through the embroidering mechanism on the support, the embroidered area can be rotated out from the position below the support through the rotary feeding structure, meanwhile, the next piece of to-be-embroidered area is fed, so that the working time is saved, the working efficiency is improved, a pressing strip can be rotated and pressed to the middle of the fabric through the smoothing and pressing structure, and the fabric can be conveniently and quickly embroidered. And then the fabric is synchronously moved towards the two sides, so that the pressing work of the fabric is realized.

Description

Technical Field

[0001] The present invention relates to the technical field of embroidery machines, and more particularly to a fabric tensioning device for an embroidery machine. Background Art

[0002] An embroidery machine, also known as a computer embroidery machine, is the most advanced embroidery machine in the contemporary era. It can achieve high speed and high efficiency in traditional manual embroidery, and can also meet the requirements of "multi-level, multi-functional, unity and perfection" that cannot be achieved by manual embroidery. When an embroidery machine is working, a fabric tensioning device is used;

[0003] A fabric tensioning device for an embroidery machine with the patent number CN117966382A is provided with a release roller and a winding roller whose positions can be adjusted. When the fabric is short, the user can rotate the first threaded rod to drive the two T-shaped plates to approach each other, thereby driving the release roller and the winding roller to approach each other, facilitating the winding and fixing of the fabric. When the fabric is long, the first threaded rod can be rotated in the opposite direction, so that the release roller and the winding roller move away from each other to adapt to the winding and fixing of the longer fabric;

[0004] However, in actual use, it is necessary to wind the fabric to be embroidered around the release roller and the winding roller. After embroidering one piece of fabric, it is necessary to remove the embroidered fabric and then rewind another piece of fabric on the release roller and the winding roller to continue the embroidery work. Such an operation is time-consuming and laborious, reducing the work efficiency. Therefore, there is room for improvement. Summary of the Invention

[0005] In order to solve the problems raised in the above background art, the present invention provides a fabric tensioning device for an embroidery machine.

[0006] The fabric tensioning device for an embroidery machine provided by the present invention adopts the following technical solutions:

[0007] A fabric tensioning device for an embroidery machine includes a chassis and a bracket. The bracket is fastened to the edge of the upper surface of the chassis by bolts. An embroidery mechanism is arranged on the bracket, and a rotary feeding structure is arranged in the middle of the upper surface of the chassis;

[0008] The rotary loading structure includes a support plate disposed directly above the middle of the chassis. The support plate is connected to the chassis through a support rod. A motor is installed at the middle of the bottom surface of the chassis. A rotating column is rotatably connected to the middle of the upper surface of the chassis. The top end of the output shaft of the motor is connected to the rotating column. A fixed cylinder is fixedly connected to the upper surface of the support plate. The fixed cylinder is movably sleeved on the rotating column. A top sleeve is fixedly sleeved on the top end of the rotating column. A plurality of connecting blocks are welded to the side surface of the top sleeve. Each connecting block is fastened with a loading plate through a bolt. A placement groove is formed in the middle of the loading plate. Pressing strips are provided on both side walls of the placement groove. A support plate is arranged in the placement groove through a moving structure. An embroidery groove is formed in the middle of the upper surface of the support plate. Flattening and pressing structures are arranged on both sides of the upper surface of the loading plate. A collection box is arranged at the front side of the upper surface of the chassis.

[0009] Preferably, the flattening and pressing structure includes first through grooves formed on both sides of the placement groove on the loading plate. A screw rod is rotatably connected to the inner wall of the first through groove close to the placement groove. A first moving plate is sleeved on the screw rod. Both ends of the first moving plate are in close contact with the inner wall of the first through groove. A threaded groove for the screw rod to pass through is formed in the first moving plate. A rotating shaft rotatably passes through the first moving plate. A turning plate is fixedly sleeved in the middle of the rotating shaft. A pressing strip is installed at one end of the turning plate. A first driving structure is arranged between the rotating shaft and the loading plate.

[0010] Preferably, the first driving structure includes a cross bar fixedly arranged on the upper surface of the loading plate close to the rear edge of the first through groove. A guiding bar is installed on the front surface of the cross bar. The guiding bar is in the shape of a parallelogram plate. A first sliding groove is formed on the rear side of the side surface of the first moving plate away from the placement groove. A first sliding block is slidably arranged in the first sliding groove. A first spring is connected between the first sliding block and the lower groove wall of the first sliding groove. A driving block is installed on the first sliding block. A gear is fixedly sleeved on the rear end of the rotating shaft. Teeth meshing with the gear are arranged on the driving block. A cylindrical rod is connected to the rear side surface of the driving block. One end of the cylindrical rod is in close contact with the cross bar.

[0011] Preferably, the moving structure includes fixing bars installed at the front and rear edges under the feeding plate. Guide bars are installed at the lower sides of the mutually approaching surfaces of the two fixing bars. A moving frame is slidably arranged between the two guide bars. A second driving structure is arranged between the moving frame and the fixed cylinder. Cross bars are connected to the front and rear edges of the inner walls on both sides of the moving frame. Inner plates are movably sleeved on the two cross bars. Second springs are sleeved on the cross bars. The two ends of each second spring are respectively connected to the inner plate and the moving frame. The support plate movably passes through the inner plate. A limiting plate is installed at the bottom end of the support plate. A limiting frame is sleeved in the middle of the support plate. The limiting frame is located above the inner plate. A limiting bar is closely attached to the middle of the right side surface of the limiting frame. The top end of the limiting bar is connected to the feeding plate. A third driving structure is arranged between the limiting plate and the moving frame. A transmission structure is arranged between the moving frame and the first moving plate. An extrusion structure is arranged between the support plate and the pressing plate.

[0012] Preferably, the third driving structure includes a convex strip arranged at the middle of the lower surface of the limiting plate. A first driving rod fixedly passes through the convex strip. First driving grooves are formed on the front and rear side surfaces of the moving frame. The two ends of the first driving rod are respectively movably inserted into the first driving grooves.

[0013] Preferably, the second driving structure includes a convex block arranged at the middle of the side surface of the moving frame close to the rotating column. A first inserting rod fixedly passes through the convex block. A top disc is fixedly sleeved at the upper part close to the fixed cylinder. A first arc-shaped groove and a second arc-shaped groove are formed on the top disc. A third arc-shaped groove communicating with one end of the first arc-shaped groove is formed on the upper surface of the top disc. Two communicating grooves are formed on the top disc. One of the communicating grooves communicates with the third arc-shaped groove and the second arc-shaped groove at its two ends respectively. The other communicating groove communicates with the first arc-shaped groove and the second arc-shaped groove at its two ends respectively. The bottom end of the first inserting rod is movably inserted into the first arc-shaped groove.

[0014] Preferably, the transmission structure includes a rotating rod rotatably connected to the other side wall of the first through groove. A spiral groove is formed on the rotating rod. A second moving plate is movably sleeved on the rotating rod. One end of the rotating rod is fixedly connected to a screw rod. A second inserting rod is fixedly inserted into the middle of the upper surface of the second moving plate. The hemispherical bottom end of the second inserting rod is movably inserted into the spiral groove. Bottom blocks are connected to the two ends of the lower surface of the second moving plate. A second sliding groove is formed at the position close to the bottom block on the right side surface of the moving frame. A second sliding block is slidably arranged in the second sliding groove. An L-shaped strip is fixedly connected to the second sliding block. Two pushing and pulling blocks are connected to the upper part of the L-shaped strip. The distance between the two pushing and pulling blocks is twice the thickness of the bottom block. A second driving rod is connected to the side surface of the second sliding block. Second driving grooves are formed on both sides of the fixing bar. One end of the second driving rod is movably inserted into the second driving groove.

[0015] Preferably, the extrusion structure includes extrusion blocks connected to the upper parts of the left and right side surfaces of the support plate. The upper right edge of the extrusion block has an inclined surface. Storage grooves are respectively formed in the lower parts of the inner walls on the left and right sides of the placement groove. The two pressing plates are respectively inserted into the storage grooves movably. A third spring is connected between the pressing plate and the inner groove wall of the storage groove. A second through groove is formed in the middle of the lower groove wall of the storage groove. A pushing block passes through the second through groove, and the top of the pushing block is connected to the pressing plate.

[0016] In summary, the present invention includes the following beneficial technical effects:

[0017] 1. By setting the rotary feeding structure, the flattening and pressing structure and the first driving structure, after embroidering one piece of fabric on the embroidery mechanism on the bracket, the embroidered area can be rotated out from below the bracket through the rotary feeding structure, and at the same time, the next area to be embroidered can be fed, so as to save working time and improve work efficiency. And through the flattening and pressing structure, the pressing strip can be rotated and pressed to the middle of the fabric, and then moved synchronously to both sides, so as to realize the pressing work on the fabric.

[0018] 2. By setting the moving structure, the second driving structure and the third driving structure, through the second driving structure, when the rotary feeding structure rotates, it can cooperate with the moving structure to automatically move into or out of the support plate from the placement groove. When moving out of the support plate below the placement groove, the placement groove can be opened, and the embroidered fabric can be automatically discharged from the placement groove. When moving into the support plate below the placement groove, in cooperation with the third driving structure, when the moving frame on the moving structure continues to move, the support plate can be automatically driven to move up and be inserted into the placement groove in the inner plate, so that the upper surfaces of the support plate and the pressing plate are at the same horizontal plane, which is convenient for placing the fabric in the placement groove and performing the tensioning work, and avoiding the problem of the fabric falling off.

[0019] 3. By setting the extrusion structure, when the support plate is inserted into the placement groove from above, the two pressing plates can be automatically pushed out of the storage groove, which is convenient for performing the tensioning work on the fabric on the pressing plate. When the support plate is moved down and pulled out from below the placement groove, the pressing plates in the placement groove can be automatically pulled back into the storage groove, so as to better open the placement groove, so that the embroidered fabric can be better discharged.

[0020] 4. By setting the transmission structure, when the moving frame moves, the flattening and pressing structure can be automatically driven to perform the tensioning and loosening work on the fabric. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic structural diagram of a fabric tensioning device for an embroidery machine in an embodiment of the present invention;

[0022] Figure 2It is a schematic structural diagram of the rotating loading structure in the embodiment of the present invention;

[0023] Figure 3 It is a schematic structural diagram of the top plate in the embodiment of the present invention;

[0024] Figure 4 It is a schematic structural diagram of the loading plate in the embodiment of the present invention;

[0025] Figure 5 It is in the embodiment of the present invention Figure 4 Enlarged view of the structure at position A;

[0026] Figure 6 It is a schematic structural diagram of the cross bar in the embodiment of the present invention;

[0027] Figure 7 It is a schematic structural diagram of the structure under the placement plate in the embodiment of the present invention;

[0028] Figure 8 It is in the embodiment of the present invention Figure 7 Enlarged view of the structure at position B;

[0029] Figure 9 It is a schematic structural diagram of the moving structure in the embodiment of the present invention;

[0030] Figure 10 It is a schematic structural diagram of the structure after the moving structure on the loading plate is disassembled in the embodiment of the present invention;

[0031] Figure 11 It is in the embodiment of the present invention Figure 10 Enlarged view of the structure at position C.

[0032] Description of the reference numerals: 1, chassis; 2, support rod; 3, support plate; 4, rotating column; 5, fixed cylinder; 6, motor; 7, top sleeve; 8, connecting block; 9, feeding plate; 10, pressing plate; 11, first through groove; 12, screw rod; 13, first moving plate; 14, rotating shaft; 15, flipping plate; 16, first sliding groove; 17, first spring; 18, first slider; 19, driving block; 20, cylindrical rod; 21, horizontal bar; 22, guiding bar; 23, gear; 24, support plate; 25, fixing bar; 26, guide rail bar; 27, moving frame; 28, cross bar; 29, second spring; 30, inner plate; 31, embroidery groove; 32, limiting frame; 33, limiting plate; 34, limiting strip; 35, convex strip; 36, first driving rod; 37, first driving groove; 38, convex block; 39, first inserting rod; 40, top plate; 41, first arc groove; 42, second arc groove; 43, communicating groove; 44, placing groove; 45, rotating rod; 46, second moving plate; 47, second inserting rod; 48, bottom block; 49, second sliding groove; 50, second slider; 51, second driving rod; 52, second driving groove; 53, L-shaped strip; 54, pushing and pulling block; 55, extrusion block; 56, storage groove; 57, second through groove; 58, third spring; 59, pushing block; 60, pressing strip; 61, bracket; 62, collecting frame; 63, third arc groove. Detailed implementation manners

[0033] The following will further describe the present invention in detail with reference to the Figures 1-11 accompanying drawings.

[0034] Referring to Figures 1-11 , an embodiment of the present invention discloses a fabric tensioning device for an embroidery machine, which includes a chassis 1 and a bracket 61. The bracket 61 is fastened to the edge of the upper surface of the chassis 1 by bolts, and an embroidery mechanism is arranged on the bracket 61. A rotary feeding structure is arranged in the middle of the upper surface of the chassis 1;

[0035] The rotary feeding structure includes a support plate 3 arranged directly above the middle of the chassis 1. The support plate 3 is connected to the chassis 1 through a support rod 2. A motor 6 is installed in the middle of the lower surface of the chassis 1. A rotating column 4 is rotatably connected to the middle of the upper surface of the chassis 1. The top end of the output shaft of the motor 6 is connected to the rotating column 4. A fixed cylinder 5 is fixedly connected to the upper surface of the support plate 3. The fixed cylinder 5 is movably sleeved on the rotating column 4. A top sleeve 7 is fixedly sleeved on the top end of the rotating column 4. Multiple connecting blocks 8 are welded to the side surface of the top sleeve 7. Each connecting block 8 is fastened with a feeding plate 9 by bolts. A placing groove 44 is opened in the middle of the upper surface of the feeding plate 9. Pressing strips 60 are arranged on both side walls of the placing groove 44. A support plate 24 is arranged in the placing groove 44 through a moving structure. An embroidery groove 31 is opened in the middle of the upper surface of the support plate 24. Flattening and pressing structures are arranged on both sides of the upper surface of the feeding plate 9. A collecting frame 62 is arranged at the front side of the upper surface of the chassis 1;

[0036] The flattening and pressing structure includes first through grooves 11 opened on the feeding plate 9 on both sides of the placement groove 44. A screw rod 12 is rotatably connected to the inner wall of the first through groove 11 close to the placement groove 44. A first moving plate 13 is sleeved on the screw rod 12. Both ends of the first moving plate 13 are in close contact with the inner groove wall of the first through groove 11. A threaded groove for the screw rod 12 to pass through is opened on the first moving plate 13. A rotating shaft 14 rotatably passes through the first moving plate 13. A turning plate 15 is fixedly sleeved in the middle of the rotating shaft 14. A pressing strip 60 is installed at one end of the turning plate 15. A first driving structure is arranged between the rotating shaft 14 and the feeding plate 9;

[0037] The first driving structure includes a cross bar 21 fixedly arranged on the upper surface of the feeding plate 9 near the rear edge of the first through groove 11. A guiding bar 22 is installed on the front surface of the cross bar 21. The guiding bar 22 is in the shape of a parallelogram plate. A first sliding groove 16 is opened on the rear side of the side surface of the first moving plate 13 away from the placement groove 44. A first sliding block 18 is slidably arranged in the first sliding groove 16. A first spring 17 is connected between the first sliding block 18 and the lower groove wall of the first sliding groove 16. A driving block 19 is installed on the first sliding block 18. A gear 23 is fixedly sleeved on the rear end of the rotating shaft 14. Teeth meshing with the gear 23 are arranged on the driving block 19. A cylindrical rod 20 is connected to the rear side surface of the driving block 19. One end of the cylindrical rod 20 is in close contact with the cross bar 21. First, directly place the fabric to be embroidered on the support plate 24 and the pressing plate 10 in the placement groove 44. Then rotate the screw rod 12. The first moving plate 13 moves away from the placement groove 44 along the rotating screw rod 12. The first moving plate 13 first drives one end of the cylindrical rod 20 to slide on the inclined surface at one end of the guiding bar 22 on the cross bar 21. Through the extrusion of the guiding bar 22 on one end of the cylindrical rod 20, the driving block 19 is pushed to drive the first sliding block 18 to move downward in the first sliding groove 16, squeezing the first spring 17 to compress. And through the teeth on the driving block 19, the gear 23 and the entire rotating shaft 14 are driven to rotate, so as to drive the pressing strip 60 at one end of the turning plate 15 to press the fabric in the middle on the support plate 24. As the first moving plate 13 continues to move, the two pressed pressing strips 60 can be driven to move toward both sides on the fabric until the pressing strips 60 move onto the pressing plate 10, thereby tightening the fabric in the placement groove 44. Then, use the embroidery mechanism on the bracket 61 to embroider the tightened fabric in the placement groove 44 on the feeding plate 9 below it. When the embroidery work is completed, the motor 6 can be directly started to drive the rotating column 4 and the feeding plate 9 to rotate as a whole, moving the embroidered fabric out from below the bracket 61. At the same time, rotate the next piece of fabric to be embroidered onto the bracket 61 below and continue the embroidery work, greatly saving the embroidery time and improving the work efficiency.

[0038] See Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 7 、 Figure 9 、Figure 10 and Figure 11 , the moving structure includes fixing bars 25 installed at the front and rear side edges below the loading plate 9. Guide bars 26 are installed below the mutually approaching side surfaces of the two fixing bars 25. A moving frame 27 is slidably arranged between the two guide bars 26. A second driving structure is arranged between the moving frame 27 and the fixed cylinder 5. Cross bars 28 are connected to the front and rear edges of the inner walls on both sides of the moving frame 27. Inner plates 30 are movably sleeved on the two cross bars 28. A second spring 29 is sleeved on the cross bars 28. The two ends of the second spring 29 are respectively connected to the inner plate 30 and the moving frame 27. The support plate 24 movably passes through the inner plate 30. A limiting plate 33 is installed at the bottom end of the support plate 24. A limiting frame 32 is sleeved in the middle of the support plate 24. The limiting frame 32 is located above the inner plate 30. A limiting bar 34 is closely attached to the middle of the right side surface of the limiting frame 32. The top end of the limiting bar 34 is connected to the loading plate 9. A third driving structure is arranged between the limiting plate 33 and the moving frame 27. A transmission structure is arranged between the moving frame 27 and the first moving plate 13. An extrusion structure is arranged between the support plate 24 and the pressing plate 10;

[0039] The third driving structure includes a convex strip 35 arranged at the middle of the lower surface of the limiting plate 33. A first driving rod 36 is fixedly passed through the convex strip 35. First driving grooves 37 are opened on the front and rear side surfaces of the moving frame 27. The two ends of the first driving rod 36 are respectively movably inserted into the first driving grooves 37;

[0040] The second driving structure includes a convex block 38 arranged at the middle of the side surface of the moving frame 27 close to the rotating column 4. A first inserting rod 39 is fixedly passed through the convex block 38. A top plate 40 is fixedly sleeved on the fixed cylinder 5 close to the top end. A first arc groove 41 and a second arc groove 42 are opened on the top plate 40. A third arc groove 63 communicating with one end of the first arc groove 41 is opened on the upper surface of the top plate 40. Two communicating grooves 43 are opened on the top plate 40. One of the communicating grooves 43 communicates with the third arc groove 63 and the second arc groove 42 at both ends respectively. The other communicating groove 43 communicates with the first arc groove 41 and the second arc groove 42 at both ends respectively. The bottom end of the first inserting rod 39 is movably inserted into the first arc groove 41;

[0041] The extrusion structure includes extrusion blocks 55 connected to the upper parts of the left and right side surfaces of the support plate 24. There is an inclined surface on the right side edge above the extrusion block 55. Receiving grooves 56 are opened at the lower parts of the inner walls on the left and right sides of the placement groove 44. Two pressing plates 10 are respectively inserted into the receiving grooves 56 movably. A third spring 58 is connected between the pressing plate 10 and the inner groove wall of the receiving groove 56. A second through groove 57 is opened in the middle of the lower groove wall of the receiving groove 56. A pushing block 59 passes through the second through groove 57. The top end of the pushing block 59 is connected to the pressing plate 10. When the rotating column 4 drives the bottom end of the first insertion rod 39 on the convex block 38 to slide from the second arc groove 42 and the corresponding communication groove 43 to the first arc groove 41 during rotation, it pushes the moving frame 27, the inner plate 30 and the support plate 24 as a whole to move away from the rotating column 4 on the feeding plate 9. When the extrusion block 55 on the right side surface of the support plate 24 driven by the moving frame 27 moves to be limited by the limiting strip 34, the support plate 24 is located directly below the placement groove 44. As the moving frame 27 continues to move, it drives the support plate 24 to slide relatively on the cross bar 28, stretching the second spring 29. During this process, it drives one end of the first driving rod 36 to slide in the first driving groove 37 on the moving frame 27, thereby pushing the support plate 24 to move upward and insert into the placement groove 44. And during the upward movement of the support plate 24, it drives the inclined surface on the extrusion block 55 to squeeze the pushing block 59, thereby pushing the pressing plate 10 out in the receiving groove 56 and inserting it into the placement groove 44, stretching the third spring 58, so that the upper surface of the support plate 24 and the upper surface of the pressing plate 10 are on the same horizontal plane, which is convenient for placing the fabric to be embroidered on the support plate 24 in the placement groove 44 and avoiding the problem of the fabric falling in the placement groove 44.

[0042] See Figure 1 、 Figure 4 、 Figure 6 and Figure 7, the transmission structure includes a rotating rod 45 rotatably connected to the groove wall on the other side of the first through groove 11. A spiral groove is formed on the rotating rod 45. A second moving plate 46 is movably sleeved on the rotating rod 45. One end of the rotating rod 45 is fixedly connected to the screw rod 12. The middle of the upper surface of the second moving plate 46 is fixedly inserted with a second inserting rod 47. The bottom end of the second inserting rod 47 in a hemispherical shape is movably inserted into the spiral groove. Both ends of the lower surface of the second moving plate 46 are connected with bottom blocks 48. A second sliding groove 49 is formed at a position on the right side of the moving frame 27 close to the bottom block 48. A second sliding block 50 is slidably arranged in the second sliding groove 49. An L-shaped strip 53 is fixedly connected to the second sliding block 50. Two pushing and pulling blocks 54 are connected to the upper surface of the L-shaped strip 53. The distance between the two pushing and pulling blocks 54 is twice the thickness of the bottom block 48. A second driving rod 51 is connected to the side surface of the second sliding block 50. Second driving grooves 52 are formed on both sides of the fixed strip 25. One end of the second driving rod 51 is movably inserted into the second driving groove 52. When the support plate 24 moves upward into the placement groove 44, with the movement of the moving frame 27, one end of the second driving rod 51 is driven to slide in the second driving groove 52, pushing the second sliding block 50 to slide upward in the second sliding groove 49, and driving the two pushing and pulling blocks 54 to move upward to both sides of the bottom block 48 through the L-shaped strip 53. Then, with the continuous movement of the moving frame 27, by the pushing of one of the pushing and pulling blocks 54 on the bottom block 48, the second moving plate 46 is driven to move in the first through groove 11. By using the sliding of one end of the second inserting rod 47 on the second moving plate 46 in the spiral groove on the rotating rod 45, the screw rod 12 can be automatically driven to rotate, so as to automatically realize the tensioning work of the fabric in the placement groove 44. The structure is simple and the function is practical.

[0043] The implementation principle of a fabric tensioning device for an embroidery machine in an embodiment of the present invention is as follows: First, start the motor 6 to drive the overall rotation of the rotating column 4 and the loading plate 9. When the loading plate 9 rotates to the second arc-shaped groove 42, it can pull the entire moving frame 27 and the support plate 24 away from below the placement groove 44, opening the placement groove 44, so that the embroidered fabric material in the placement groove 44 can fall into the collection box 62, realizing the automatic blanking function. When the bottom right end of the first plug rod 39 slides in the communication groove 43 driven by the loading plate 9, it pushes the entire moving frame 27, the inner plate 30, and the support plate 24 to move away from the rotating column 4 on the loading plate 9. When the extrusion block 55 on the right side of the support plate 24 driven by the moving frame 27 moves to be limited by the limiting strip 34, the support plate 24 is located directly below the placement groove 44. As the moving frame 27 continues to move, it drives the support plate 24 to slide relatively on the cross bar 28, stretching the second spring 29. During this process, it drives one end of the first driving rod 36 to slide in the first driving groove 37 on the moving frame 27, thereby pushing the support plate 24 to move upward and insert into the placement groove 44. And during the upward movement of the support plate 24, it drives the inclined surface of the extrusion block 55 to squeeze the pushing block 59, so as to push the pressing plate 10 out in the storage groove 56 and insert it into the placement groove 44, stretching the third spring 58, so that the upper surface of the support plate 24 and the upper surface of the pressing plate 10 are on the same horizontal plane. At this time, place the fabric material to be embroidered on the support plate 24 and the pressing plate 10 in the placement groove 44. Then, the rotating column 4 continues to rotate, driving the bottom end of the first plug rod 39 to slide from the communication groove 43 to the first arc-shaped groove 41. During this process, the moving frame 27 continues to move, driving one end of the second driving rod 51 to slide in the second driving groove 52, pushing the second slider 50 to slide upward in the second sliding groove 49, and driving the two push-pull blocks 54 to move upward to both sides of the bottom block 48 through the L-shaped strip 53. In this way, as the moving frame 27 continues to move, through the pushing of one of the push-pull blocks 54 on the bottom block 48, it drives the second moving plate 46 to move in the first through groove 11. By using the sliding of one end of the second plug rod 47 on the second moving plate 46 in the spiral groove on the rotating rod 45, it can automatically drive the screw rod 12 to rotate. The first moving plate 13 moves away from the placement groove 44 on the rotating screw rod 12. The first moving plate 13 first drives one end of the cylindrical rod 20 to slide on the inclined surface of one end of the guiding strip 22 on the cross bar 21. Through the extrusion of the guiding strip 22 on one end of the cylindrical rod 20, it pushes the driving block 19 to drive the first slider 18 to move downward in the first sliding groove 16, squeezing the first spring 17 to compress, and driving the gear 23 and the rotating shaft 14 to rotate as a whole through the teeth on the driving block 19, so as to drive one end of the pressing strip 60 of the flipping plate 15 to press the fabric material in the middle of the support plate 24. As the first moving plate 13 continues to move, it can drive the two pressed pressing strips 60 to move to both sides on the fabric until the pressing strips 60 move to the pressing plate 10, thereby tightening the fabric in the placement groove 44. When the loading plate 9 rotates to below the support 61,The fabric is embroidered using an embroidery mechanism. After embroidery, the rotating column 4 continues to drive the feeding plate 9 to rotate. When the bottom end of the first insertion rod 39 driven by the feeding plate 9 slides into the third arc-shaped groove 63, it drives the moving frame 27 to continue moving away from the rotating column 4, causing one end of the cylindrical rod 20 to disengage from the guiding strip 22. The elastic force of the first spring 17 is used to push the driving block 19 downward to reset, so that the pressing strip 60 is lifted on the pressing plate 10 to separate the embroidered fabric. Finally, the rotating column 4 continues to rotate, driving the bottom end of the first insertion rod 39 to slide in another communication groove 43, driving the moving frame 27 to move back toward the rotating column 4 to reset, so that the support plate 24 and the pressing plate 10 are moved away in the placement groove 44, opening the placement groove 44, causing the embroidered fabric to automatically fall into the collection frame 62 for collection. During this process, the first moving plate 13 moves toward the placement groove 44 along the rotating screw rod 12. Under the guidance of the inclined surface at the other end of the guiding strip 22, the cylindrical rod 20 moves in the reverse direction while clinging to the lower surface of the guiding strip 22, so that the pressing strip 60 is in a state of loosening the fabric, and moves in the reverse direction. In this way, the next piece of fabric can be smoothly tightened, the operation is more labor-saving and convenient, and the work efficiency is higher.

[0044] The above are all the preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of the present invention should be covered within the protection scope of the present invention.

Claims

1. A fabric tensioning device for an embroidery machine, comprising a chassis (1) and a bracket (61), characterized in that: A bracket (61) is fastened with bolts at the upper edge of the chassis (1), an embroidery mechanism is arranged on the bracket (61), and a rotating feeding structure is arranged in the middle of the upper portion of the chassis (1); The rotary feeding structure comprises a support plate (3) arranged at the top of the middle of the chassis (1), the support plate (3) being connected to the chassis (1) via a support rod (2), a motor (6) being installed at the middle of the bottom of the chassis (1), the top of the chassis (1) being rotatably connected to a rotating column (4), the top of the output shaft of the motor (6) being connected to the rotating column (4), the top of the support plate (3) being fixedly connected to a fixed cylinder (5), the fixed cylinder (5) being movably sleeved on the rotating column (4), the top of the rotating column (4) being fixedly sleeved with a top sleeve (7), A plurality of connecting blocks (8) are welded to the side of the top sleeve (7), and a loading plate (9) is fastened to each of the connecting blocks (8) by bolts. A placement groove (44) is provided in the middle of the loading plate (9), and compression strips (60) are provided on both side walls of the placement groove (44). A support plate (24) is provided in the placement groove (44) via a movable structure, and an embroidery groove (31) is provided in the middle of the support plate (24). Flattening and compression structures are provided on both sides of the loading plate (9), and a collecting frame (62) is provided on the front side of the upper side of the chassis (1).

2. A fabric tensioning device for an embroidery machine according to claim 1, characterized in that: The smoothing and pressing structure comprises a first through slot (11) provided on the loading plate (9) on both sides of the placement slot (44); a screw rod (12) is rotatably connected to the inner wall of the first through slot (11) close to the placement slot (44); a first movable plate (13) is sleeved on the screw rod (12); both ends of the first movable plate (13) are in close contact with the inner slot wall of the first through slot (11); a threaded slot for the screw rod (12) to pass through is provided on the first movable plate (13); a rotating shaft (14) is rotatably passed through the first movable plate (13); a flip plate (15) is fixedly sleeved in the middle of the rotating shaft (14); a pressing strip (60) is installed at one end of the flip plate (15); and a first driving structure is arranged between the rotating shaft (14) and the loading plate (9).

3. A fabric tensioning device for an embroidery machine according to claim 2, characterized in that: The first driving structure comprises a horizontal bar (21) fixedly arranged on the loading plate (9) near the rear edge of the first through groove (11); a guide bar (22) is installed on the front of the horizontal bar (21); the guide bar (22) is in the shape of a parallelogram plate; a first slide groove (16) is provided on the rear side of a side of the first movable plate (13) away from the placement groove (44); a first slider (18) is slidably arranged in the first slide groove (16); a first spring (17) is connected between the first slider (18) and the lower groove wall of the first slide groove (16); a driving block (19) is installed on the first slider (18); a gear (23) is fixedly sleeved on the rear end of the rotating shaft (14); teeth meshing with the gear (23) are arranged on the driving block (19); a cylindrical rod (20) is connected to the rear side of the driving block (19); one end of the cylindrical rod (20) is tightly attached to the horizontal bar (21).

4. A fabric tensioning device for an embroidery machine according to claim 3, characterized in that: The movable structure comprises a fixing bar (25) installed at the front and rear edges of the lower side of the loading plate (9); two fixing bars (25) are each installed with a guide bar (26) at the lower side close to each other; a movable frame (27) is slidably arranged in the two guide bars (26); a second driving structure is arranged between the movable frame (27) and the fixing cylinder (5); cross bars (28) are connected to the front and rear edges of the inner walls on both sides of the movable frame (27); inner plates (30) are movably sleeved on the two cross bars (28); a second spring (29) is sleeved on the cross bar (28); and two ends of the second spring (29) are respectively connected to the inner plate (30) and the movable frame (27). The support plate (24) is movable through the inner plate (30), a limit plate (33) is installed at the bottom end of the support plate (24), a limit frame (32) is sleeved in the middle of the support plate (24), the limit frame (32) is located above the inner plate (30), the middle of the right side of the limit frame (32) is tightly attached to the limit strip (34), the top end of the limit strip (34) is connected to the loading plate (9), a third driving structure is arranged between the limit plate (33) and the moving frame (27), a transmission structure is arranged between the moving frame (27) and the first moving plate (13), and an extrusion structure is arranged between the support plate (24) and the pressing plate (10).

5. A fabric tensioning device for an embroidery machine according to claim 4, characterized in that: The third driving structure comprises a convex strip (35) arranged at the middle of the lower side of the limiting plate (33), a first driving rod (36) fixedly passing through the convex strip (35), and first driving grooves (37) are provided on both the front and rear side surfaces of the movable frame (27), and both ends of the first driving rod (36) are movably inserted into the first driving grooves (37).

6. A fabric tensioning device for an embroidery machine according to claim 4, characterized in that: The second driving structure comprises a protrusion (38) arranged at the middle of a side surface of the moving frame (27) close to the rotating column (4), the first insertion rod (39) is fixedly passed through the protrusion (38), a top plate (40) is fixedly sleeved on the fixed cylinder (5) near the top, a first arc groove (41) and a second arc groove (42) are provided on the top plate (40), a third arc groove (63) connected to one end of the first arc groove (41) is provided on the top plate (40), two connecting grooves (43) are provided on the top plate (40), two ends of one of the connecting grooves (43) are respectively connected to the third arc groove (63) and the second arc groove (42), and two ends of the other connecting groove (43) are respectively connected to the first arc groove (41) and the second arc groove (42), and the bottom end of the first insertion rod (39) is movably inserted into the first arc groove (41).

7. A fabric tensioning device for an embroidery machine according to claim 4, characterized in that: The transmission structure comprises a rotating rod (45) rotatably connected to the groove wall on the other side of the first through groove (11), a spiral groove is provided on the rotating rod (45), a second movable plate (46) is movably sleeved on the rotating rod (45), one end of the rotating rod (45) is fixedly connected to the screw rod (12), a second insertion rod (47) is fixedly inserted into the middle of the upper part of the second movable plate (46), the lower end of the second insertion rod (47) in a hemispherical shape is movably inserted into the spiral groove, the lower ends of the second movable plate (46) are connected to the bottom block (48), and the right side of the movable frame (27) is close to the bottom block (48). 8) is provided at the position, a second slide groove (49) is slidably provided in the second slide groove (49), an L-shaped strip (53) is fixedly connected to the second slide groove (50), two push-pull blocks (54) are connected to the upper side of the L-shaped strip (53), a distance between the two push-pull blocks (54) is twice the thickness of the bottom block (48), a second driving rod (51) is connected to the side of the second slide groove (50), second driving grooves (52) are provided on both sides of the fixed strip (25), and one end of the second driving rod (51) is movably inserted into the second driving groove (52).

8. The fabric tensioning device for an embroidery machine according to claim 4, characterized in that: The extrusion structure comprises an extrusion block (55) connected to the upper part of the left and right side surfaces of the support plate (24); the upper right edge of the extrusion block (55) is an inclined surface; the lower part of the inner walls on the left and right sides of the placement groove (44) is provided with a receiving groove (56); the two pressing plates (10) are respectively movably inserted into the receiving groove (56); a third spring (58) is connected between the pressing plate (10) and the inner groove wall of the receiving groove (56); a second through groove (57) is provided in the middle of the lower groove wall of the receiving groove (56); a pushing block (59) passes through the second through groove (57); and the top end of the pushing block (59) is connected to the pressing plate (10).

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