Automatic thread trimming device for industrial sewing machine

Abstract

This utility model relates to the field of industrial sewing machines and discloses an automatic thread cutting device for industrial sewing machines, including a fixed frame. This utility model has the following advantages and effects: When it is necessary to cut the sewing thread, the electric telescopic rod can be controlled to move the limiting sliding plate, allowing the laser cutting head above the limiting sliding plate to contact the sewing thread. During the movement, the limiting sliding plate can drive the transmission gear to rotate via the toothed groove. The transmission gear can drive the rack to move in the opposite direction of the limiting sliding plate, thereby allowing the rack to drive the tensioning block to tension and straighten the sewing thread. The laser cutting head is then activated to cut the sewing thread. The cutting speed is fast, improving production efficiency. During the cutting process, the cut edge of the sewing thread melts instantly due to high temperature, forming a relatively smooth cross-section and reducing burrs. Since no blade directly contacts the sewing thread, operators do not face the risk of being cut by a blade when handling the yarn.

Description

Technical Field

[0001] This utility model relates to the field of industrial sewing machine technology, and in particular to an automatic thread-cutting device for industrial sewing machines. Background Technology

[0002] Industrial sewing machines are sewing machines suitable for mass production in sewing factories or other industrial sectors. Factories that need sewing machines, such as those producing clothing, shoes, and hats, all use industrial sewing machines. Industrial sewing machines need to be used with a fully automatic thread-cutting device, which automatically cuts the thread when the sewing is finished.

[0003] In the existing technology, cutting sewing thread with scissors poses a risk of cuts to personnel when handling broken sewing thread. Furthermore, in the process of mass sewing production, the blades for cutting thread need to be replaced regularly to prevent the blades from becoming worn and unable to cut the sewing thread. Utility Model Content

[0004] The above-mentioned technical objective of this utility model is achieved through the following technical solution: an automatic thread cutting device for an industrial sewing machine, including a fixed frame, an extension frame fixedly installed on one side of the fixed frame, a limiting sliding plate slidably installed on the inner side of the fixed frame, an installation block fixedly installed on one side of the fixed frame, and an automatic thread cutting component for an industrial sewing machine provided on the fixed frame, the extension frame, the limiting sliding plate and the installation block.

[0005] The automatic thread trimming assembly for the industrial sewing machine includes a laser cutting head, a flue gas filter pipe, a fan, a filter element, and a second mounting plate. The laser cutting head is fixedly installed on one side of the limiting sliding plate, the flue gas filter pipe is fixedly installed on the inside of the limiting sliding plate, the fan is fixedly installed on the inside of the flue gas filter pipe, the filter element is fixedly installed inside the limiting sliding plate, and the second mounting plate is fixedly installed on the bottom of the filter element. The second mounting plate is installed on the bottom of the limiting sliding plate by bolts.

[0006] Preferably, an electric telescopic rod is fixedly installed on the rear inner wall of the fixing frame, and the limiting sliding plate is fixedly installed on the output end of the electric telescopic rod.

[0007] Preferably, a first mounting plate is fixedly installed on one side of both the fixed frame and the extension frame, a fixed plate is fixedly installed on the top of the fixed frame, a thread-passing groove is provided on the top of the fixed plate, and an industrial sewing machine anti-thread-breakage component is provided on the automatic thread-cutting assembly, the fixed plate and the mounting block of the industrial sewing machine.

[0008] Preferably, the automatic thread trimming assembly of the industrial sewing machine further includes a rotating shaft, a transmission gear, a toothed groove, a rack, and a tensioning block. The rotating shaft is rotatably mounted on the inner side of the mounting block, the transmission gear is fixedly mounted on the outer side of the rotating shaft, the toothed groove is formed on one side of the limiting sliding plate, the toothed groove meshes with the transmission gear, the rack is slidably mounted on the inner right side of the extension frame, and the tensioning block is fixedly mounted on the top of the rack.

[0009] Preferably, the industrial sewing machine anti-thread breakage assembly includes a turntable, a cam, and a limiting plate. The turntable is fixedly installed on the top of the rotating shaft, the cam is fixedly installed on the top of the turntable, and the limiting plate is fixedly installed on the top of the fixed plate.

[0010] By adopting the above technical solution, the turntable can drive the cam to rotate. The center of the cam is not the same as that of the turntable, which allows the cam to drive the connecting frame to perform reciprocating linear motion.

[0011] Preferably, the industrial sewing machine anti-thread breakage assembly further includes a connecting frame, a fixed felt plate, and a movable felt plate. The connecting frame is slidably installed on the inner side of the limiting plate, the fixed felt plate is fixedly installed on the top of the fixed plate, and the movable felt plate is fixedly installed on one side of the connecting frame.

[0012] By adopting the above technical solution, both the fixed felt board and the movable felt board are existing technologies, which can adsorb the sewing thread and prevent the sewing thread from flying away after being cut.

[0013] Preferably, a guide groove is provided on one side of the limiting plate, and the connecting frame is slidably installed on the inner side of the guide groove.

[0014] By adopting the above technical solution, the guide groove allows the connecting frame to slide after being subjected to force, and allows the connecting frame to drive the moving felt plate to adsorb the sewing thread.

[0015] Preferably, a connecting groove is provided on one side of the connecting frame, and the cam fits into the connecting groove.

[0016] By adopting the above technical solution, the connecting groove allows the cam to drive the connecting frame, which is limited by the limiting plate, to perform reciprocating linear motion after rotation.

[0017] Preferably, a limiting groove is provided on one side of the fixing frame, and limiting blocks are fixedly installed on the left and right sides of the limiting sliding plate, with the limiting blocks slidably installed inside the limiting groove.

[0018] By adopting the above technical solution, the combination of the limiting groove and the limiting block allows the limiting sliding plate to slide more stably inside the fixed frame.

[0019] Preferably, the bottom of the limiting sliding plate is provided with an installation groove, the filter element is fitted into the installation groove, and the filter element is disposed on the inner side of the flue gas filtration pipe.

[0020] By adopting the above technical solution, the filter element can filter the flue gas drawn in by the fan, preventing the flue gas caused by the laser cutting head during the cutting process from spreading.

[0021] The beneficial effects of this utility model are:

[0022] 1. This utility model, through the automatic thread-cutting component for industrial sewing machines, allows for the movement of a limit sliding plate via an electric telescopic rod when thread cutting is required. This movement brings the laser cutting head above the limit sliding plate into contact with the sewing thread. During movement, the limit sliding plate rotates a transmission gear via a toothed groove. This gear, in turn, moves a rack in the opposite direction to the limit sliding plate, causing the rack to engage a tensioning block to taut the thread. The laser cutting head then opens and cuts the thread. The fast cutting speed improves production efficiency. During the cutting process, the thread cut surface melts instantly at high temperatures, resulting in a relatively smooth cross-section and reducing burrs. Since no blade directly contacts the thread, operators are protected from hand injuries when handling the yarn.

[0023] 2. This utility model, through the industrial sewing machine anti-thread breakage component, enables the transmission gear to rotate, thereby driving the rotating shaft to rotate. The rotating shaft can drive the turntable and cam on one side to rotate. The centers of the cam and the turntable are different, allowing the turntable to drive the connecting frame and the movable felt plate, which are limited by the limiting plate, to reciprocate linearly. This allows the movable felt plate to abut against the fixed felt plate, allowing the sewing thread to be adhered to the middle of the fixed felt plate and the movable felt plate, making it easy for personnel to find the sewing thread. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the structure of an automatic thread-cutting device for an industrial sewing machine proposed in this utility model.

[0026] Figure 2 This is a partial structural diagram of the rack and tensioning block proposed in this utility model.

[0027] Figure 3 This is a partial structural diagram of the transmission gear and rack proposed in this utility model.

[0028] Figure 4 This is a partial structural diagram of the fixing plate and wire-threading groove proposed in this utility model.

[0029] In the diagram, 1. Automatic thread trimming assembly for industrial sewing machines; 2. Thread breakage prevention assembly for industrial sewing machines; 3. Fixing frame; 4. Extension frame; 5. First mounting plate; 6. Electric telescopic rod; 7. Limiting sliding plate; 8. Fixing plate; 9. Threading groove; 10. Mounting block;

[0030] 11. Laser cutting head; 12. Flue gas filtration duct; 13. Fan; 14. Filter element; 15. Second mounting plate; 16. Rotating shaft; 17. Transmission gear; 18. Gear groove; 19. Rack; 20. Tensioning block;

[0031] 21. Turntable; 22. Cam; 23. Limiting plate; 24. Connecting frame; 25. Fixed felt plate; 26. Moving felt plate. Detailed Implementation

[0032] See Figure 1 , Figure 2 , Figure 3 and Figure 4 This utility model provides an automatic thread cutting device for an industrial sewing machine, including a fixed frame 3, an extension frame 4 fixedly installed on one side of the fixed frame 3, a limiting sliding plate 7 slidably installed on the inner side of the fixed frame 3, and an installation block 10 fixedly installed on one side of the fixed frame 3. An automatic thread cutting assembly 1 for an industrial sewing machine is provided on the fixed frame 3, the extension frame 4, the limiting sliding plate 7 and the installation block 10.

[0033] The automatic thread cutting assembly 1 for industrial sewing machines includes a laser cutting head 11, a flue gas filter pipe 12, a fan 13, a filter element 14, and a second mounting plate 15. The laser cutting head 11 is fixedly installed on one side of the limiting sliding plate 7, the flue gas filter pipe 12 is fixedly installed on the inside of the limiting sliding plate 7, the fan 13 is fixedly installed on the inside of the flue gas filter pipe 12, the filter element 14 is fixedly installed inside the limiting sliding plate 7, and the second mounting plate 15 is fixedly installed on the bottom of the filter element 14. The second mounting plate 15 is installed on the bottom of the limiting sliding plate 7 by bolts. During the cutting process, the sewing thread cut surface melts instantly due to high temperature, forming a relatively smooth cross-section and reducing burrs. Since there is no need for the blade to directly contact the sewing thread, there is no risk of the operator cutting their palm when handling the yarn.

[0034] In this embodiment, an electric telescopic rod 6 is fixedly installed on the rear inner wall of the fixing frame 3, and a limiting sliding plate 7 is fixedly installed on the output end of the electric telescopic rod 6.

[0035] In this embodiment, a first mounting plate 5 is fixedly installed on one side of both the fixed frame 3 and the extension frame 4, and a fixed plate 8 is fixedly installed on the top of the fixed frame 3. A threading groove 9 is opened on the top of the fixed plate 8, and an industrial sewing machine anti-thread breakage component 2 is provided on the industrial sewing machine automatic thread cutting assembly 1, the fixed plate 8 and the mounting block 10.

[0036] In this embodiment, the automatic thread cutting assembly 1 of the industrial sewing machine further includes a rotating shaft 16, a transmission gear 17, a toothed groove 18, a rack 19, and a tensioning block 20. The rotating shaft 16 is rotatably mounted on the inner side of the mounting block 10, the transmission gear 17 is fixedly mounted on the outer side of the rotating shaft 16, the toothed groove 18 is formed on one side of the limiting sliding plate 7, and the toothed groove 18 and the transmission gear 17 mesh with each other. The rack 19 is slidably mounted on the inner right side of the extension frame 4, and the tensioning block 20 is fixedly mounted on the top of the rack 19. The electric telescopic rod 6 is controlled to move the limiting sliding plate 7, and the laser cutting head 11 above the limiting sliding plate 7 comes into contact with the sewing thread. During the movement, the limiting sliding plate 7 can drive the transmission gear 17 to rotate through the toothed groove 18. The transmission gear 17 can drive the rack 19 to move in the opposite direction of the limiting sliding plate 7, so that the rack 19 drives the tensioning block 20 to tension and straighten the sewing thread. The laser cutting head 11 is controlled to open and cut the sewing thread.

[0037] In this embodiment, the industrial sewing machine anti-thread breakage assembly 2 includes a turntable 21, a cam 22, and a limiting plate 23. The turntable 21 is fixedly installed on the top of the rotating shaft 16, the cam 22 is fixedly installed on the top of the turntable 21, and the limiting plate 23 is fixedly installed on the top of the fixed plate 8. The cam 22 is connected to the connecting frame 24, which allows the turntable 21 to drive the movable felt plate 26 to move and abut against the fixed felt plate 25 after rotation.

[0038] In this embodiment, the industrial sewing machine anti-breakage assembly 2 also includes a connecting frame 24, a fixed felt plate 25, and a movable felt plate 26. The connecting frame 24 is slidably installed on the inner side of the limiting plate 23, the fixed felt plate 25 is fixedly installed on the top of the fixed plate 8, and the movable felt plate 26 is fixedly installed on one side of the connecting frame 24. By having the movable felt plate 26 abut against the fixed felt plate 25, the sewing thread can be adhered to the middle of the fixed felt plate 25 and the movable felt plate 26, making it easy for personnel to find the sewing thread and preventing the sewing thread from becoming loose or flying out after cutting.

[0039] In this embodiment, a guide groove is provided on one side of the limiting plate 23, and the connecting frame 24 is slidably installed on the inner side of the guide groove; the guide groove allows the connecting frame 24 to slide after being subjected to force, and allows the connecting frame 24 to drive the moving felt plate 26 to move and adsorb the sewing thread.

[0040] In this embodiment, a connecting groove is provided on one side of the connecting frame 24, and the cam 22 fits into the connecting groove; during the rotation of the transmission gear 17, it can drive the rotating shaft 16 to rotate, and the rotating shaft 16 can drive the turntable 21 and the cam 22 on one side to rotate. The centers of the cam 22 and the turntable 21 are different, so that the turntable 21 can drive the connecting frame 24 and the moving felt plate 26, which are limited by the limiting plate 23, to perform reciprocating linear motion through the cam 22.

[0041] In this embodiment, a limiting groove is provided on one side of the fixed frame 3, and limiting blocks are fixedly installed on the left and right sides of the limiting sliding plate 7. The limiting blocks are slidably installed on the inner side of the limiting groove. The limiting groove can make the limiting sliding plate 7 more stable during movement. The toothed groove 18 above the limiting sliding plate 7 can drive the transmission gear 17 to rotate. The transmission gear 17 can make the rack 19 move in the opposite direction to the limiting sliding plate 7.

[0042] In this embodiment, the bottom of the limiting sliding plate 7 is provided with an installation groove, the filter element 14 is attached to the installation groove, and the filter element 14 is set inside the flue gas filtration pipe 12. If flue gas is generated during the cutting process, a flue gas sensor is set inside the flue gas filtration pipe 12. When the flue gas is detected, the fan 13 can be started and the filter element 14 can filter the flue gas inside the flue gas filtration pipe 12 so that the flue gas can be discharged after filtration.

[0043] Specifically, when the sewing thread needs to be cut, the electric telescopic rod 6 can be controlled to move the limiting sliding plate 7, allowing the laser cutting head 11 above the limiting sliding plate 7 to come into contact with the sewing thread. During the movement, the limiting sliding plate 7 can drive the transmission gear 17 to rotate via the toothed groove 18. The transmission gear 17 can drive the rack 19 to move in the opposite direction of the limiting sliding plate 7, thereby allowing the rack 19 to drive the tensioning block 20 to tension and straighten the sewing thread. The laser cutting head 11 is then activated to cut the sewing thread. The cutting speed is fast, which can improve production efficiency. During the cutting process, the cut edge of the sewing thread melts instantly due to the high temperature, forming a relatively smooth cross-section and reducing burrs. Since there is no need for the blade to directly contact the sewing thread, there is no risk of the operator cutting their palm when handling the thread. If fumes are generated during the cutting process... A flue gas sensor is installed inside the flue gas filtration duct 12. When flue gas is detected, the fan 13 is started, and the filter element 14 filters the flue gas inside the flue gas filtration duct 12, allowing the flue gas to be discharged after filtration. During the rotation of the transmission gear 17, the rotating shaft 16 is driven to rotate. The rotating shaft 16 can drive the turntable 21 and cam 22 on one side to rotate. The centers of the cam 22 and the turntable 21 are not the same, so the turntable 21 can drive the connecting frame 24 and the moving felt plate 26, which are limited by the limiting plate 23, to reciprocate linearly. This allows the moving felt plate 26 to abut against the fixed felt plate 25, allowing the sewing thread to be adhered in the middle of the fixed felt plate 25 and the moving felt plate 26, making it easy for personnel to find the sewing thread and preventing the sewing thread from becoming loose or flying out after cutting.

Claims

1. An automatic thread trimming device for an industrial sewing machine, characterized by, include: A fixed frame (3) is provided with an extension frame (4) fixedly installed on one side of the fixed frame (3), a limiting sliding plate (7) is slidably installed on the inner side of the fixed frame (3), and an installation block (10) is fixedly installed on one side of the fixed frame (3). An automatic thread cutting assembly (1) for an industrial sewing machine is provided on the fixed frame (3), the extension frame (4), the limiting sliding plate (7) and the installation block (10). The automatic thread cutting assembly (1) of the industrial sewing machine includes a laser cutting head (11), a flue gas filter pipe (12), a fan (13), a filter element (14), and a second mounting plate (15). The laser cutting head (11) is fixedly installed on one side of the limiting sliding plate (7). The flue gas filter pipe (12) is fixedly installed on the inner side of the limiting sliding plate (7). The fan (13) is fixedly installed on the inner side of the flue gas filter pipe (12). The filter element (14) is fixedly installed inside the limiting sliding plate (7). The second mounting plate (15) is fixedly installed at the bottom of the filter element (14). The second mounting plate (15) is installed at the bottom of the limiting sliding plate (7) by bolts.

2. An automatic thread trimming device for an industrial sewing machine according to claim 1, wherein An electric telescopic rod (6) is fixedly installed on the inner rear wall of the fixed frame (3), and the limiting sliding plate (7) is fixedly installed at the output end of the electric telescopic rod (6).

3. An automatic thread trimming device for an industrial sewing machine according to claim 1, wherein The first mounting plate (5) is fixedly installed on one side of the fixed frame (3) and the extension frame (4). The top of the fixed frame (3) is fixedly installed with a fixing plate (8). The top of the fixing plate (8) is provided with a thread groove (9). The industrial sewing machine automatic thread cutting assembly (1), the fixing plate (8) and the mounting block (10) are provided with an industrial sewing machine anti-breakage assembly (2).

4. An automatic thread trimming device for an industrial sewing machine according to claim 1, wherein The automatic thread-cutting assembly (1) of the industrial sewing machine further includes a rotating shaft (16), a transmission gear (17), a toothed groove (18), a rack (19), and a tensioning block (20). The rotating shaft (16) is rotatably mounted on the inner side of the mounting block (10). The transmission gear (17) is fixedly mounted on the outer side of the rotating shaft (16). The toothed groove (18) is opened on one side of the limiting sliding plate (7). The toothed groove (18) and the transmission gear (17) mesh with each other. The rack (19) is slidably mounted on the inner right side of the extension frame (4). The tensioning block (20) is fixedly mounted on the top of the rack (19).

5. An automatic thread trimming device for an industrial sewing machine according to claim 3, wherein The industrial sewing machine anti-breakage assembly (2) includes a turntable (21), a cam (22) and a limiting plate (23). The turntable (21) is fixedly installed on the top of the rotating shaft (16), the cam (22) is fixedly installed on the top of the turntable (21), and the limiting plate (23) is fixedly installed on the top of the fixing plate (8).

6. An automatic thread trimming device for an industrial sewing machine according to claim 5, wherein The industrial sewing machine anti-breakage assembly (2) also includes a connecting frame (24), a fixed felt plate (25), and a movable felt plate (26). The connecting frame (24) is slidably installed on the inner side of the limiting plate (23), the fixed felt plate (25) is fixedly installed on the top of the fixed plate (8), and the movable felt plate (26) is fixedly installed on one side of the connecting frame (24).

7. An automatic thread-cutting device for an industrial sewing machine according to claim 6, characterized in that, The limiting plate (23) has a guide groove on one side, and the connecting frame (24) is slidably installed on the inner side of the guide groove.

8. An automatic thread trimming device for an industrial sewing machine according to claim 6, wherein A connecting groove is provided on one side of the connecting frame (24), and the cam (22) fits into the connecting groove.

9. An automatic thread trimming device for an industrial sewing machine according to claim 1, wherein A limiting groove is provided on one side of the fixed frame (3), and limiting blocks are fixedly installed on the left and right sides of the limiting sliding plate (7). The limiting blocks are slidably installed on the inner side of the limiting groove.

10. An automatic thread trimming device for an industrial sewing machine according to claim 1, wherein The bottom of the limiting sliding plate (7) is provided with an installation groove, the filter element (14) is attached to the installation groove, and the filter element (14) is set inside the flue gas filtration pipe (12).

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