A bed skirt serging machine

Abstract

This invention relates to the field of fitted sheet overlock machine technology, and discloses a fitted sheet overlock machine, including a workbench A, on which a sewing machine is fixedly connected. A workbench B is provided on one side of the workbench A, and a housing is fixedly connected to one side of the workbench A. A mounting plate is rotatably connected inside the housing. A winding frame is rotatably connected to the top and bottom of one side of the mounting plate. Gears are fixedly connected to the side of the winding frame away from the mounting plate, and the gears on the winding frame mesh with each other. In this fitted sheet overlock machine, when the elastic cord is being driven, a new elastic cord is placed on another winding frame. At this time, when the elastic cord is being driven, the winding frame can drive another winding frame on the mounting plate to rotate through the cooperation of the two gears. The driven winding frame can then wind up the new elastic cord, avoiding the need for manual rewinding of the elastic cord after it is used up in traditional devices, which affects the efficiency of fitted sheet overlock work.

Description

Technical Field

[0001] This invention relates to the field of overlocking machines for fitted sheets, specifically an overlocking machine for fitted sheets. Background Technology

[0002] A fitted sheet overlock machine is a special sewing machine used to complete the overlocking process in the production of fitted sheets. Overlocking, also known as overlocking, is an important step in the production of clothing and bedding, designed to prevent the yarn from fraying at the edges of the fabric and to enhance its appearance.

[0003] The working principle of fitted sheet overlocking machines is basically the same. The skirt is rolled up by a take-up roller and driven by a transmission mechanism. At the same time, there is another transmission mechanism to transport the elastic cord. Through the two transmission mechanisms, the skirt and elastic cord are transported to the sewing mechanism respectively. Then the backing sheet is taken out. At this time, the worker sews the skirt, backing sheet and elastic cord together by the sewing mechanism to complete the fitted sheet overlocking work.

[0004] Overlock machines for fitted sheets are widely used in the market and are commonly found among major sewing machine manufacturers. They are an indispensable piece of equipment in the fitted sheet production process, and their efficient and precise operation can greatly improve the production efficiency and quality of fitted sheets.

[0005] During the use of fitted sheet overlock machines, the frame for winding the elastic cord needs to be rewound after the elastic cord is used up. However, this winding process is mostly done manually, significantly impacting the overall efficiency of the fitted sheet overlock process. Therefore, we propose a fitted sheet overlock machine. Summary of the Invention

[0006] The purpose of this invention is to provide a fitted sheet overlock machine to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a fitted sheet overlock machine, comprising a workbench A, a sewing machine fixedly connected to the workbench A, a workbench B provided on one side of the workbench A, a housing fixedly connected to one side of the workbench A, a mounting plate rotatably connected inside the housing, a winding frame rotatably connected to the top and bottom of one side of the mounting plate, gears fixedly connected to the side of the winding frame away from the mounting plate, and the gears on the winding frame meshing with each other, and a rotating wheel rotatably connected to one side of the housing, the rotating wheel being fixedly connected to the mounting plate.

[0008] Preferably, a cover plate is slidably connected to the top side of the outer casing, a limiting wheel B is rotatably connected to the side of the cover plate near the outer casing, a limiting wheel A is rotatably connected to the top of the outer casing near the cover plate, and a knob is threadedly connected to one side of the cover plate.

[0009] Preferably, the top two sides of the workbench B are fixedly connected to rails, and the opposite sides of the rails are provided with limiting grooves. The bottom of the workbench B is rotatably connected to clamping rods A.

[0010] Preferably, a fixed frame is slidably connected between the tracks, and a plurality of telescopic rods are fixedly connected to the bottom of the fixed frame. A limiting plate is fixedly connected between the bottoms of the telescopic rods, and paper tape is fixedly connected to the bottom of the limiting plate. Limiting rods are fixedly connected to both ends of the top of the limiting plate, and the limiting rods are slidably connected to the limiting grooves on the same side of the track.

[0011] Preferably, a support frame A is slidably connected between the outer sides of the track, a support frame B is fixedly connected to the bottom of the support frame A, and a clamping rod B is rotatably connected between the support frames B.

[0012] Preferably, a load-bearing frame is fixedly connected to the top of the workbench A, and a placement platform is slidably connected to both sides of the top of the load-bearing frame. A placement rack is fixedly connected to the top of the workbench A, and the placement rack is located between the two placement platforms.

[0013] Preferably, a mounting frame A is fixedly connected to one side of the load-bearing frame, and a take-up roller is rotatably connected to the end of the mounting frame A away from the load-bearing frame. Two transmission rods A are rotatably connected between the mounting frames A. A transmission motor is fixedly connected to one side of the mounting frame A, and the output end of the transmission motor is fixedly connected to one of the transmission rods A.

[0014] Preferably, a mounting frame B is fixedly connected to the side of the load-bearing frame away from the mounting frame A, a connecting rod is rotatably connected between the tops of the mounting frames B, two transmission rods B are rotatably connected between the bottoms of the mounting frames B, a drive motor is fixedly connected to one side of the mounting frame B, and the output end of the drive motor is fixedly connected to the end of any one of the transmission rods B.

[0015] Preferably, a control box is fixedly connected to the side of the workbench A near the outer shell, and a transmission frame is rotatably connected to the side of the control box near the outer shell, with the transmission frame located above the outer shell.

[0016] Preferably, a lead screw is rotatably connected to the track on the top side of the workbench B near the outer shell. The lead screw is threadedly connected to the fixed frame. A fixed motor is fixedly connected to one end of the track on the top of the workbench B with the lead screw, and the output end of the fixed motor is fixedly connected to the end of the lead screw.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] 1. When the elastic cord is driven, the new elastic cord is placed on another winding frame. When the elastic cord is driven, the winding frame can drive another winding frame on the mounting plate to rotate through two gears. At this time, the driven winding frame can wind up the new elastic cord. This avoids the need to manually rewind the elastic cord after it is used up, which affects the efficiency of the overlocking work of the fitted sheet, and effectively improves the auxiliary function of the device when the elastic cord is replaced.

[0019] 2. In the transmission process of the elastic rope, the elastic rope is placed between the limiting wheel A and the limiting wheel B. At this time, the cover plate can be moved to adjust the distance between the limiting wheel A and the limiting wheel B. This changes the clamping tightness of the elastic rope by the limiting wheel A and the limiting wheel B, thereby adjusting the tightness of the elastic rope during transmission. This effectively improves the convenience of adjusting the tightness of the elastic rope when the device is used for overlocking fitted sheets.

[0020] 3. In this invention, when moving the film, a fixed motor drives a lead screw to rotate, thereby transmitting power to the fixed frame. As the fixed frame moves, the telescopic rod automatically extends and retracts through the cooperation of the limiting rod and the limiting groove. One end of the film is then glued with masking tape, and the film is moved along with the limiting plate to the other end of the track. During the movement of the fixed frame, the support frame A is manually pushed, causing clamping rod B to engage with clamping rod A. Clamping rods B and A then work together to hold the film, completing the film transport process. This avoids the problem of accidentally picking up multiple films simultaneously when manually handling them. Furthermore, the cooperation between clamping rods A and B during film movement helps to level the film, improving the assistance during film movement. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 This is another structural schematic diagram of the present invention;

[0023] Figure 3 This is a schematic diagram of the outer shell structure of the present invention;

[0024] Figure 4 This is a schematic diagram of the structure of the mounting plate and its connecting components of the present invention;

[0025] Figure 5 This is a schematic diagram of the track and its connecting components of the present invention;

[0026] Figure 6 This is a schematic diagram of the track structure of the present invention;

[0027] Figure 7This is a schematic diagram of the support frame A structure of the present invention;

[0028] Figure 8 This is a schematic diagram of the fixing frame structure of the present invention.

[0029] In the diagram: 1. Workbench A; 11. Sewing machine; 12. Support frame; 13. Placement table; 14. Placement rack; 2. Mounting frame A; 21. Take-up roller; 22. Transmission rod A; 23. Transmission motor; 3. Mounting frame B; 31. Connecting rod; 32. Transmission rod B; 33. Drive motor; 4. Control box; 41. Transmission frame; 5. Housing; 51. Limiting wheel A; 52. Cover plate; 53. Limiting wheel B; 54. Knob; 6. Mounting plate; 61. Take-up rack; 62. Gear; 63. Rotary wheel; 7. Workbench B; 71. Track; 72. Limiting groove; 73. Clamping rod A; 74. Lead screw; 75. Fixed motor; 8. Fixed frame; 81. Telescopic rod; 82. Limiting plate; 83. Paper tape; 84. Limiting rod; 9. Support frame A; 91. Support frame B; 92. Clamping rod B. Detailed Implementation

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

[0031] Please see Figure 1-8 The present invention provides a technical solution: a fitted sheet overlock machine, including a workbench A1, a sewing machine 11 fixedly connected to the workbench A1, a load-bearing frame 12 fixedly connected to the top of the workbench A1, a placement table 13 slidably connected to both sides of the top of the load-bearing frame 12, and a placement rack 14 fixedly connected to the top of the workbench A1, with the placement rack 14 located between the two placement tables 13.

[0032] Furthermore, the sewing machine 11 can sew the hem, the base piece, and the elastic cord to complete the overlocking work of the fitted sheet. The thread used for overlocking can be placed on the placement table 13 to facilitate the use of the sewing machine 11. The placement frame 14 can support the hem part between the mounting frame A2 and the mounting frame B3 to prevent the hem from sagging and affecting its transmission operation.

[0033] Combined with appendix Figure 1 and Figure 2As shown, a mounting frame A2 is fixedly connected to one side of the load-bearing frame 12, and a take-up roller 21 is rotatably connected to the end of the mounting frame A2 away from the load-bearing frame 12. Two transmission rods A22 are rotatably connected between the mounting frames A2. A transmission motor 23 is fixedly connected to one side of the mounting frame A2, and the output end of the transmission motor 23 is fixedly connected to one of the transmission rods A22.

[0034] Furthermore, when performing the hemming work on the fitted sheet, the skirt is first cut to the specified width, then wound around the take-up roller 21, with one end passed between the two drive rods A22 and placed between the two drive rods B32. At this time, the drive motor 23 is turned on, and the skirt is driven by the rotating drive rods A22. During the transmission of the skirt, the two drive rods A22 cooperate to smooth the skirt, so that the skirt moves in a flat state.

[0035] Combined with appendix Figure 1 and Figure 2 As shown, a mounting frame B3 is fixedly connected to the side of the load-bearing frame 12 away from the mounting frame A2. A connecting rod 31 is rotatably connected between the tops of the mounting frames B3. Two transmission rods B32 are rotatably connected between the bottoms of the mounting frames B3. A drive motor 33 is fixedly connected to one side of the mounting frame B3, and the output end of the drive motor 33 is fixedly connected to the end of any one of the transmission rods B32.

[0036] Furthermore, while starting the transmission motor 23, the drive motor 33 is also started. At this time, the drive motor 33 can drive the transmission rod B32 connected to it to rotate. The transmission rod B32 works together with the rotating transmission rod A22 to drive the skirt hem. At the same time, the transmission rod B32 can continue to flatten the skirt hem during the rotation process, so that the skirt hem is still in a flat state when it enters the sewing machine 11.

[0037] Combined with appendix Figure 1 and Figure 2 As shown, a control box 4 is fixedly connected to the side of the workbench A1 near the outer shell 5, and a transmission frame 41 is rotatably connected to the side of the control box 4 near the outer shell 5. The transmission frame 41 is located above the outer shell 5.

[0038] Furthermore, the control box 4 is equipped with control elements. Using the control elements in the control box 4, all electrical appliances on the device can be controlled. The transmission frame 41 has its own drive mechanism. When the elastic rope is being transmitted, the elastic rope is placed on the transmission frame 41. At this time, the transmission frame 41 is rotated, and the elastic rope can be transmitted using the transmission frame 41. At this time, the elastic rope and the skirt are synchronously transmitted to the sewing machine 11. With the help of the base sheet, the overlocking work of the fitted sheet can be completed.

[0039] Combined with appendix Figure 1 , Figure 3 and Figure 4 As shown, a housing 5 is fixedly connected to one side of the workbench A1, a cover plate 52 is slidably connected to the top side of the housing 5, a limit wheel B53 is rotatably connected to the side of the cover plate 52 near the housing 5, a limit wheel A51 is rotatably connected to the top side of the housing 5 near the cover plate 52, and a knob 54 is threadedly connected to one side of the cover plate 52.

[0040] An installation plate 6 is rotatably connected inside the outer casing 5. A winding frame 61 is rotatably connected to the top and bottom of one side of the installation plate 6. A gear 62 is fixedly connected to the side of the winding frame 61 away from the installation plate 6, and the gears 62 on the winding frame 61 mesh with each other. A rotating wheel 63 is rotatably connected to one side of the outer casing 5, and the rotating wheel 63 is fixedly connected to the installation plate 6.

[0041] Furthermore, when conveying the elastic rope, the elastic rope is placed between the limiting wheel B53 and the limiting wheel A51. Then, the knob 54 is turned, and the cover plate 52 can be slid to adjust the distance between the limiting wheel B53 and the limiting wheel A51, so that the limiting wheel B53 and the limiting wheel A51 are in contact with the elastic rope. At this time, the tension of the elastic rope can be adjusted according to the clamping force of the limiting wheel A51 and the limiting wheel B53 on the elastic rope. After the position of the cover plate 52 is adjusted, the knob 54 is turned in the opposite direction to fix and limit the cover plate 52.

[0042] Furthermore, before overlocking the fitted sheet, first wind the elastic cord around the lower take-up frame 61. Then, rotate the mounting plate 6 via the rotating wheel 63 to swap the positions of the two take-up frames 61 on the mounting plate 6. At this time, pass one end of the elastic cord on the take-up frame 61 through the limit wheels B53 and A51, and place it on the transmission frame 41. Then, pull one end of the elastic cord to the sewing machine 11. After that, when overlocking the fitted sheet, the transmission frame 41 will pull the elastic cord to move. The tightening rope will cause the winding frame 61 to rotate, and the winding frame 61 can drive another winding frame 61 to rotate via the gear 62. At this time, place one end of the new slack rope on the empty winding frame 61, and use the rotating winding frame 61 to wind up the new slack rope. When the winding is completed, the slack rope on the other winding frame 61 will be used up. At this time, rotate the wheel 63 again to swap the positions of the two winding frames 61, and continue to repeat the above operation to continuously and quickly change the slack rope.

[0043] Combined with appendix Figure 1 , Figure 2 , Figure 5 , Figure 6 and Figure 8As shown, a workbench B7 is provided on one side of the workbench A1. The top two sides of the workbench B7 are fixedly connected to rails 71, and the opposite sides of the rails 71 are provided with limiting grooves 72. The bottom of the workbench B7 is rotatably connected to a clamping rod A73. A lead screw 74 is rotatably connected in the rail 71 on the top of the workbench B7 near the outer shell 5. The lead screw 74 is threadedly connected to the fixing frame 8. A fixed motor 75 is fixedly connected to one end of the rail 71 on the top of the workbench B7 with the lead screw 74, and the output end of the fixed motor 75 is fixedly connected to the end of the lead screw 74.

[0044] A fixed frame 8 is slidably connected between the tracks 71. Several telescopic rods 81 are fixedly connected to the bottom of the fixed frame 8. A limiting plate 82 is fixedly connected between the bottoms of the telescopic rods 81. Paper tape 83 is fixedly connected to the bottom of the limiting plate 82. Limiting rods 84 are fixedly connected to both ends of the top of the limiting plate 82, and the limiting rods 84 are slidably connected to the limiting grooves 72 on the same side track 71.

[0045] Next, the film is stacked on the worktable B7. At this time, the fixed motor 75 is started, which drives the lead screw 74 to rotate. The rotating lead screw 74 can drive the fixed frame 8 to move along the track 71 for conveying the film.

[0046] Furthermore, during the movement of the fixing frame 8, the track 71 can limit and guide the limiting rod 84 through the limiting groove 72. After the fixing frame 8 moves to one end of the track 71, the limiting rod 84 will descend along the limiting groove 72, causing the telescopic rod 81 to extend. As the telescopic rod 81 extends, the limiting plate 82 can also descend. At this point, the paper tape 83 can be used to adhere to the surface of the uppermost base film. Then, the fixing motor 75 is controlled to rotate in the opposite direction. The reverse-rotating screw 74 will then drive the fixing frame 8 to move along the track 71 towards the sewing machine 11. After the fixing frame 8 moves in the opposite direction, the limiting rod 84 will... The plate is lifted along the limiting groove 72, and the telescopic rod 81 is retracted, causing the limiting plate 82 to rise. At this time, the paper tape 83 can lift one end of the base piece and move it around the clamping rod A73 towards the sewing machine 11. When the fixing frame 8 moves to the end of the track 71 close to the sewing machine 11, the fixing motor 75 is turned off. At this time, the operator manually tears the base piece off the paper tape 83 and places it on the sewing machine 11 for overlocking. Then, the fixing motor 75 is turned on again to move the fixing frame 8 and repeat the above operation to continuously perform overlocking.

[0047] Combined with appendix Figure 5 and Figure 7As shown, a support frame A9 is slidably connected between the outer sides of the track 71, a support frame B91 is fixedly connected to the bottom of the support frame A9, and a clamping rod B92 is rotatably connected between the support frames B91.

[0048] Furthermore, before the paper tape 83 is applied to the substrate, the support frame A9 is manually pulled to separate the clamping rods B92 and A73, allowing the limiting plate 82 to descend smoothly and the paper tape 83 to adhere to it. After the paper tape 83 lifts the substrate, the support frame A9 is manually pushed to bring the clamping rods B92 and A73 into place. At this point, the clamping rods A73 and B92 work together to level the substrate during its movement, ensuring that the substrate remains flat after transport, facilitating the edge-sealing work of the workers.

[0049] Working principle: First, install the device in the designated position, then power on the device, and then it can be used. First, cut the skirt to the designated width, then wrap it around the take-up roller 21, pass one end of it between the two drive rods A22, place it between the two drive rods B32, and place it at the sewing machine 11.

[0050] Next, the elastic rope is wound around the take-up frame 61 located below. Then, the mounting plate 6 is rotated by the rotating wheel 63 to swap the positions of the two take-up frames 61 on the mounting plate 6. At this time, one end of the elastic rope on the take-up frame 61 is passed through the limiting wheel B53 and the limiting wheel A51 and placed on the transmission frame 41. One end is then pulled to the sewing machine 11. Then, the knob 54 is turned to slide the cover plate 52 and adjust the distance between the limiting wheel B53 and the limiting wheel A51 so that the limiting wheel B53 and the limiting wheel A51 are in contact with the elastic rope. At this time, the tension of the elastic rope can be adjusted according to the clamping force of the limiting wheel A51 and the limiting wheel B53 on the elastic rope during the feeding. After the position of the cover plate 52 is adjusted, the knob 54 is turned in the opposite direction to fix the cover plate 52 in a limited position.

[0051] The film is then stacked on workbench B7. The support frame A9 is then manually pulled to separate clamping rods B92 and A73. At this point, the fixed motor 75 is activated, causing the lead screw 74 to rotate. The rotating lead screw 74 drives the fixed frame 8 to move along the track 71. During the movement of the fixed frame 8, the track 71 guides and limits the limiting rod 84 via the limiting groove 72. After the fixed frame 8 moves to one end of the track 71, the limiting rod 84 descends along the limiting groove 72, causing the telescopic rod 81 to extend. As the telescopic rod 81 extends, the limiting plate 82 descends along with it. At this point, masking tape 83 can be used to attach the film to the top layer. Then, control the fixed motor 75 to rotate in the opposite direction. At this time, the screw 74 rotating in the opposite direction can drive the fixed frame 8 to move along the track 71 towards the sewing machine 11. After the fixed frame 8 moves in the opposite direction, the limiting rod 84 will be raised along the limiting groove 72 and drive the telescopic rod 81 to retract, so that the limiting plate 82 is raised. At this time, the paper tape 83 can lift one end of the bottom piece and pass around the clamping rod A73 so that it moves together towards the sewing machine 11. During this process, manually push the support frame A9 so that the clamping rod B92 and the clamping rod A73 are in contact. At this time, the clamping rod A73 and the clamping rod B92 cooperate to flatten the bottom piece during the movement.

[0052] Then turn on the transmission motor 23 and drive motor 33. At this time, the skirt hem can be driven by the rotating transmission rod A22 and transmission rod B32, so that the skirt hem is continuously fed to the sewing machine 11.

[0053] When performing the overlocking of the fitted sheet, the transmission frame 41 will pull the elastic rope to move. At this time, the elastic rope will drive the winding frame 61 to rotate. The winding frame 61 can drive another winding frame 61 to rotate through the gear 62. At this time, place one end of the new elastic rope on the empty winding frame 61. The rotating winding frame 61 can be used to wind up the new elastic rope. When the winding is completed, the elastic rope on the other winding frame 61 is used up. At this time, rotate the wheel 63 again to exchange the positions of the two winding frames 61, and continue to repeat the previous operation.

[0054] Then, the hem, backing, and elastic cord can be sewn together using sewing machine 11 to complete the overlocking of the fitted sheet.

[0055] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0056] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A fitted sheet overlock machine, comprising a workbench A (1), wherein a sewing machine (11) is fixedly connected to the workbench A (1), and a workbench B (7) is provided on one side of the workbench A (1), characterized in that: A housing (5) is fixedly connected to one side of the workbench A (1). A mounting plate (6) is rotatably connected inside the housing (5). A winding rack (61) is rotatably connected to the top and bottom of one side of the mounting plate (6). A gear (62) is fixedly connected to the side of the winding rack (61) away from the mounting plate (6), and the gears (62) on the winding rack (61) mesh with each other. A rotating wheel (63) is rotatably connected to one side of the housing (5), and the rotating wheel (63) is fixedly connected to the mounting plate (6). The top two sides of the workbench B (7) are fixedly connected to rails (71), and each side of the rails (71) is provided with a limiting groove (72). The bottom of the workbench B (7) is rotatably connected to a clamping rod A (73). The rails (71) are slidably connected to a fixing frame (8). The bottom of the fixing frame (8) is fixedly connected to several telescopic rods (81). The bottom of the telescopic rods (81) is fixedly connected to a limiting plate (82). The bottom of the limiting plate (82) is fixedly connected to a paper tape (83). (82) has a limit rod (84) fixedly connected to both ends of the top, and the limit rod (84) is slidably connected to the limit groove (72) on the same side track (71). The workbench B (7) has a lead screw (74) rotatably connected in the track (71) on the side of the outer shell (5) near the top. The lead screw (74) is threadedly connected to the fixed frame (8). The workbench B (7) has a fixed motor (75) fixedly connected to one end of the track (71) with the lead screw (74) at the top. The output end of the fixed motor (75) is fixedly connected to the end of the lead screw (74). A support frame A (9) is slidably connected between the outer sides of the track (71), and a support frame B (91) is fixedly connected to the bottom of the support frame A (9). A clamping rod B (92) is rotatably connected between the support frames B (91). Stack the film on workbench B (7), then manually pull support frame A (9) to separate clamping rod B (92) and clamping rod A (73). At this time, start the fixed motor (75) to drive the lead screw (74) to rotate. The rotating lead screw (74) can drive the fixed frame (8) to move along the track (71). During the movement of the fixed frame (8), the track (71) can limit and guide the limit rod (84) through the limit groove (72). After the fixed frame (8) moves to one end of the track (71), the limit rod (84) will descend along the limit groove (72) and drive the telescopic rod (81) to extend. When the telescopic rod (81) extends, the limit plate (82) descends along with it. At this time, use paper tape (83) to stick to the top of the film surface. Then, control the fixed motor (75) to rotate in the opposite direction. The screw (74) rotating in the opposite direction drives the fixed frame (8) to move along the track (71) towards the sewing machine (11). After the fixed frame (8) moves in the opposite direction, the limiting rod (84) will be lifted along the limiting groove (72) and drive the telescopic rod (81) to retract, so that the limiting plate (82) is lifted. At this time, the paper tape (83) lifts one end of the bottom piece and passes around the clamping rod A (73) so that the lifted end of the bottom piece moves together towards the sewing machine (11). During this process, manually push the support frame A (9) so that the clamping rod B (92) and the clamping rod A (73) fit together. At this time, the clamping rod A (73) and the clamping rod B (92) cooperate to flatten the bottom piece during the movement of the bottom piece.

2. The overlock machine for fitted sheets according to claim 1, characterized in that: A cover plate (52) is slidably connected to one side of the top of the outer shell (5). A limiting wheel B (53) is rotatably connected to the side of the cover plate (5) near the outer shell (5). A limiting wheel A (51) is rotatably connected to the top of the outer shell (5) near the cover plate (52). A knob (54) is threadedly connected to one side of the cover plate (52).

3. The overlock machine for fitted sheets according to claim 1, characterized in that: The top of the workbench A (1) is fixedly connected to a load-bearing frame (12), and the top two sides of the load-bearing frame (12) are slidably connected to a placement platform (13). The top of the workbench A (1) is fixedly connected to a placement rack (14), and the placement rack (14) is located between the two placement platforms (13).

4. A fitted sheet overlock machine according to claim 3, characterized in that: A mounting frame A (2) is fixedly connected to one side of the load-bearing frame (12), and a take-up roller (21) is rotatably connected to the end of the mounting frame A (2) away from the load-bearing frame (12). Two transmission rods A (22) are rotatably connected between the mounting frames A (2). A transmission motor (23) is fixedly connected to one side of the mounting frame A (2), and the output end of the transmission motor (23) is fixedly connected to one of the transmission rods A (22).

5. A fitted sheet overlock machine according to claim 4, characterized in that: The load-bearing frame (12) is fixedly connected to the mounting frame B (3) on the side away from the mounting frame A (2). The top of the mounting frame B (3) is rotatably connected to the connecting rod (31). The bottom of the mounting frame B (3) is rotatably connected to the two transmission rods B (32). The mounting frame B (3) is fixedly connected to one side of the drive motor (33), and the output end of the drive motor (33) is fixedly connected to the end of any one of the transmission rods B (32).

6. A fitted sheet overlock machine according to claim 1, characterized in that: A control box (4) is fixedly connected to the side of the workbench A (1) near the outer shell (5). A transmission frame (41) is rotatably connected to the side of the control box (4) near the outer shell (5). The transmission frame (41) is located above the outer shell (5).

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