Cloth tensioning device of sewing machine

Abstract

The utility model discloses a cloth tensioning device of a sewing machine, and relates to the field of cloth tensioning devices. The supporting and tightening device comprises a supporting and tightening device body and a sewing machine, the supporting and tightening device body comprises a first clamping table frame, a second clamping table frame, a third adjusting frame and a fifth adjusting frame, and the supporting and tightening device is provided with a reinforcing mechanism, a first mounting piece, a second mounting piece, a supporting and tightening block, a bolt hole, a hexagonal groove, a ball seat, a first screw rod, a threaded sleeve and a second screw rod; vibration generated in the working process of the sewing machine can be effectively resisted, looseness is not prone to occurring even if the sewing machine is affected by vibration for a long time, and therefore the stability of tensioning force is guaranteed, in addition, the threaded sleeve and the threaded rod can be adjusted in length, it is guaranteed that the third adjusting frame and the fifth adjusting frame with different angles can be matched, installation and detachment are convenient, and use is convenient. The overall stability is enhanced, and the situation that the tensioning degree is not enough due to the fact that the tensioning roller shifts downwards is avoided.

Description

Technical Field

[0001] This utility model relates to the field of fabric tensioning devices, specifically a sewing machine fabric tensioning device. Background Technology

[0002] The sewing machine fabric tensioner is an extremely practical sewing machine accessory that plays a key role in improving sewing quality and efficiency. This ingeniously designed device includes multiple adjustable frames as a base for mounting and supporting other components. Its flexible design allows users to adjust the position and height of the device to accommodate fabrics of varying thicknesses and materials. Three pulleys within the device form a stable triangular support structure, made of wear-resistant materials to ensure durability and reliability over extended use.

[0003] Currently, existing sewing machine fabric tensioning devices use multiple adjusting frames with three pulleys to ensure the tensioning belt can hold the fabric taut. However, because sewing machines vibrate during use, long-term use can cause the adjusting bolts between the adjusting frames to loosen or shift due to vibration. This results in unstable tension or even loosening, which in turn affects the fabric tensioning effect. This can lead to fabric shifting or wrinkling during sewing, affecting sewing quality and efficiency. Utility Model Content

[0004] Therefore, the purpose of this utility model is to provide a sewing machine fabric tensioning device to solve the technical problem that existing devices cause the adjusting bolts to loosen or shift due to vibration, resulting in unstable tension and affecting the fabric tensioning effect, sewing quality, and efficiency.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a sewing machine fabric tensioning device, comprising a tensioning device and a sewing machine, wherein the tensioning device comprises a first clamping table frame, a second clamping table frame, a third adjusting frame and a fifth adjusting frame, and reinforcing mechanisms are installed on both sides of the third adjusting frame and the fifth adjusting frame, wherein the reinforcing mechanism comprises a first mounting member and a second mounting member, the first mounting member being disposed on the third adjusting frame and the second mounting member being disposed on the fifth adjusting frame;

[0006] Both the first mounting component and the second mounting component are U-shaped. Clamping blocks are screwed to both sides of the first mounting component and the second mounting component, and bolt holes are passed through the clamping blocks. Hexagonal grooves are opened on the outer side of the bolt holes.

[0007] The top of the first mounting component and the bottom of the second mounting component are both provided with ball seats, and a first screw and a second screw are installed on the two ball seats. A threaded sleeve is screwed between the first screw and the second screw.

[0008] By adopting the above technical solution, the tensioning device, through the combination of the first clamping frame, the second clamping frame, the third adjusting frame, and the fifth adjusting frame, forms a stable support structure. The installation of the reinforcing mechanism further enhances the stability of the device, ensuring the stable tension of the fabric during the sewing process.

[0009] Furthermore, after the clamping block is tightened, it can abut against the third and fifth adjusting frames, and a fixing bolt is screwed into the bolt hole.

[0010] By adopting the above technical solution and tightening it with the fixing bolts in the bolt holes, a tight connection between the reinforcing mechanism and the adjusting frame is ensured, preventing loosening due to vibration or long-term use, and improving the stability and reliability of the device.

[0011] Furthermore, a sixth adjustment frame is rotatably connected to the top of the fifth adjustment frame via an adjustment bolt, and a threaded telescopic rod is rotatably connected to one side of the sixth adjustment frame via a rotating block.

[0012] By adopting the above technical solution, the device can flexibly adjust its angle and height according to actual needs, adapting to the requirements of different sewing machines and workbenches, and improving the applicability and flexibility of the device.

[0013] Furthermore, a rubber block is provided at the bottom of the threaded telescopic rod, and the rubber block abuts against the sewing machine.

[0014] By adopting the above technical solution, the vibration generated by the sewing machine during operation is effectively buffered, preventing the vibration from affecting the tensioning device, while protecting the sewing machine from direct collision and wear, and extending the service life of the equipment.

[0015] Furthermore, the sewing machine includes a workbench, with the sewing machine mounted on the top of the workbench. The first clamping frame and the second clamping frame are respectively clamped to the front and rear ends of the workbench. The bottom of the first clamping frame and the second clamping frame are screwed with clamping bolts. After the clamping bolts are tightened, they are used to fix the first clamping frame and the second clamping frame to the workbench. An organic body is mounted on the top of the workbench.

[0016] By adopting the above technical solution, the tensioning device can be stably installed on workbenches of different sizes and types, improving the versatility and stability of the device.

[0017] Furthermore, the top of the first clamping table frame is provided with a mounting plate, and a first adjusting frame is installed on one side of the mounting plate by adjusting bolts. A first roller is rotatably connected to one side of the first adjusting frame, and a second adjusting frame is detachably connected to the top of the second clamping table frame by bolts.

[0018] By adopting the above technical solution, the position and angle of the belt roller can be adjusted as needed, which facilitates the pressing of fabrics of different sizes and shapes, and improves the flexibility and practicality of the device.

[0019] Furthermore, a fourth adjusting frame is rotatably connected to one side of the second adjusting frame via adjusting bolts, and a second belt roller is rotatably connected to one side of the fourth adjusting frame.

[0020] By adopting the above technical solution, the adjustability of the device is increased, allowing the two belt rollers to work together to press the fabric more evenly and improve the sewing quality.

[0021] Furthermore, a fifth adjustment frame is rotatably connected to one side of the second adjustment frame via an adjustment bolt, and a sixth adjustment frame is provided on one side of the fifth adjustment frame.

[0022] By adopting the above technical solutions, the device can adapt to more complex sewing needs, thus improving its applicability and flexibility.

[0023] Furthermore, a third belt roller is rotatably connected to one side of the sixth adjusting frame, and a pressing belt is sleeved between the third belt roller, the second belt roller, and the first belt roller.

[0024] By adopting the above technical solution, the pressing belt can firmly fix the fabric on the worktable, preventing the fabric from shifting and wrinkling during the sewing process, thus improving sewing efficiency and quality.

[0025] Furthermore, the first and second belt rollers are pressure rollers, and the third belt roller is a tension roller.

[0026] By adopting the above technical solution, each belt roller can play its unique role. The pressing roller is responsible for pressing the fabric, and the tensioning roller is responsible for adjusting the tension of the pressing belt, which together ensures the stable fixation and uniform pressing of the fabric.

[0027] Furthermore, the first and second belt rollers are tensioning rollers, and the third belt roller is a tensioning roller.

[0028] In summary, the present invention has the following main advantages:

[0029] 1. This utility model, by setting up a reinforcing mechanism, a first mounting component, a second mounting component, a tensioning block, bolt holes, a hexagonal groove, a ball seat, a first screw, a threaded sleeve, and a second screw, and the reinforcing mechanism tightly connects the third and fifth adjusting frames together through the first and second mounting components, can effectively resist the vibration generated by the sewing machine during operation, prevent relative displacement between the adjusting frames, and thus maintain the stability of the tensioning device. Moreover, the tensioning block in the reinforcing mechanism is screwed to the adjusting frame through bolt holes, and the tensioning block has a hexagonal groove, which is convenient for tightening with tools, so that the tensioning block can be firmly fixed on the adjusting frame. Even if it is subjected to long-term vibration, it is not easy to loosen, thus ensuring the stability of the tension force. In addition, the threaded sleeve and screw can be adjusted in length to ensure that they can be adapted to the third and fifth adjusting frames at different angles. Moreover, the installation and disassembly are convenient, enhancing the overall stability and avoiding the situation where the tensioning roller shifts downward and the tension is insufficient.

[0030] 2. This utility model features a sewing machine fabric tensioning device. The first and second clamping frames are respectively clamped to the front and rear ends of the worktable, and the clamping frames are fixed to the worktable by clamping bolts. This device can adapt to worktables of different sizes and types. Furthermore, the use of a first, second, third, fourth, fifth, and sixth adjusting frame allows for flexible adjustment of angles and positions to accommodate fabrics of different sizes and shapes. The threaded telescopic rod and rubber blocks effectively buffer the vibrations generated by the sewing machine during operation, preventing the vibrations from affecting the tensioning device and avoiding the displacement of the third belt roller. Attached Figure Description

[0031] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0032] Figure 2 This is a rear-view three-dimensional structural diagram of the present invention;

[0033] Figure 3 This is a partial three-dimensional structural diagram of the tensioning device of this utility model;

[0034] Figure 4 This utility model Figure 3 Enlarged structural diagram at point A in the middle.

[0035] In the diagram: 1. Tensioning device; 101. First clamping table frame; 102. Second clamping table frame; 103. Clamping bolt; 104. Mounting plate; 105. First adjusting frame; 106. First belt roller; 107. Second adjusting frame; 108. Third adjusting frame; 109. Fourth adjusting frame; 110. Second belt roller; 111. Fifth adjusting frame; 112. Sixth adjusting frame; 113. Third belt roller; 114. Rotating block; 115. Threaded telescopic rod; 2. Sewing machine; 201. Workbench; 202. Machine body; 3. Reinforcing mechanism; 301. First mounting component; 302. Second mounting component; 303. Tensioning block; 304. Bolt hole; 305. Hexagonal groove; 306. Ball seat; 307. First screw; 308. Threaded sleeve; 309. Second screw; 4. Tensioning belt. Detailed Implementation

[0036] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0037] Example 1:

[0038] A sewing machine fabric tensioning device, such as Figures 1-4As shown, the device includes a tensioning device 1 and a sewing machine 2. The tensioning device 1 includes a first clamping frame 101, a second clamping frame 102, a third adjusting frame 108, and a fifth adjusting frame 111. Reinforcing mechanisms 3 are installed on both sides of the third adjusting frame 108 and the fifth adjusting frame 111. Each reinforcing mechanism 3 includes a first mounting member 301 and a second mounting member 302. The first mounting member 301 is mounted on the third adjusting frame 108, and the second mounting member 302 is mounted on the fifth adjusting frame 111. Both the first mounting member 301 and the second mounting member 302 have a "U"-shaped structure. Pressing blocks 303 are screwed to both sides of the first mounting member 301 and the second mounting member 302, and press them together. A bolt hole 304 is provided through the block 303, and a hexagonal groove 305 is provided on the outer side of the bolt hole 304. Ball seats 306 are provided on the top of the first mounting member 301 and the bottom of the second mounting member 302, and a first screw 307 and a second screw 309 are mounted on the two ball seats 306. A threaded sleeve 308 is screwed between the first screw 307 and the second screw 309. This sewing machine fabric tensioning device 1 provides extremely high stability and adjustability through the first clamping table 101, the second clamping table 102, the third adjusting frame 108, and the fifth adjusting frame 111, as well as the reinforcing mechanism 3 installed on both sides of the third adjusting frame 108 and the fifth adjusting frame 111. The first mounting member 301 and the second mounting member 302 in the reinforcing mechanism 3 have a "U"-shaped structure, which facilitates installation and fixing. At the same time, the design of the clamping blocks 303, bolt holes 304, and hexagonal grooves 305 on both sides makes the fastening more reliable and facilitates quick adjustment using tools. The combination of ball seat 306, first screw 307, threaded sleeve 308 and second screw 309 provides a flexible adjustment method to adapt to different fabrics and sewing needs.

[0039] See Figure 1 , Figure 4 After the clamping block 303 is tightened, it can abut against the third adjusting frame 108 and the fifth adjusting frame 111. A fixing bolt is screwed into the bolt hole 304. This design ensures a tight connection between the reinforcing mechanism 3 and the adjusting frame, effectively preventing loosening due to vibration or external force during use. The fixing bolt screwed into the bolt hole 304 makes installation and disassembly more convenient, while also ensuring the stability of the connection and improving the reliability and durability of the entire tensioning device 1.

[0040] See Figure 3 , Figure 4The top of the fifth adjusting frame 111 is rotatably connected to the sixth adjusting frame 112 via an adjusting bolt. One side of the sixth adjusting frame 112 is rotatably connected to a threaded telescopic rod 115 via a rotating block 114. This design allows the sixth adjusting frame 112 to flexibly adjust its angle according to actual needs, improving the adaptability and flexibility of the tensioning device 1. The threaded telescopic rod 115, rotatably connected to one side of the sixth adjusting frame 112 via the rotating block 114, further increases the adjustment range, allowing the device to more precisely adapt to the height and angle of different sewing machines 2 and worktables 201.

[0041] Example 2:

[0042] See Figure 1 A rubber block is provided at the bottom of the threaded telescopic rod 115, and the rubber block abuts against the sewing machine 2. The rubber block at the bottom of the threaded telescopic rod 115 not only provides a good cushioning effect, effectively reducing the impact of vibration generated by the sewing machine 2 during operation on the tensioning device 1, but also protects the sewing machine 2 from direct impact and wear. This detailed design improves the stability of the tensioning device 1 and extends the service life of the sewing machine 2.

[0043] See Figure 1 , Figure 2 The sewing machine 2 includes a worktable 201, with the sewing machine 2 mounted on top of the worktable 201. A first clamping frame 101 and a second clamping frame 102 are respectively clamped to the front and rear ends of the worktable 201. Clamping bolts 103 are screwed to the bottom of the first clamping frame 101 and the second clamping frame 102. Tightening the clamping bolts 103 secures the first clamping frame 101 and the second clamping frame 102 to the worktable 201. A machine body 202 is mounted on top of the worktable 201. This design allows the tensioning device 1 to be stably installed on worktables 201 of different sizes and types, improving the versatility and stability of the device. Simultaneously, the design of the clamping bolts 103 makes installation and disassembly more convenient.

[0044] See Figure 3 , Figure 4The first clamping frame 101 has a mounting plate 104 on its top. A first adjusting frame 105 is mounted on one side of the mounting plate 104 via adjusting bolts. A first belt roller 106 is rotatably connected to one side of the first adjusting frame 105. A second adjusting frame 107 is detachably connected to the top of the second clamping frame 102 via bolts. The mounting plate 104 on the top of the first clamping frame 101, and the first adjusting frame 105 mounted on one side of the mounting plate 104 via adjusting bolts, provide extremely high adjustability and flexibility. The first belt roller 106 rotatably connected to one side of the first adjusting frame 105, and the second adjusting frame 107 detachably connected to the top of the second clamping frame 102 via bolts, allow the tensioning device 1 to be quickly adjusted according to different fabrics and sewing needs, improving the practicality and efficiency of the device.

[0045] See Figure 1 , Figure 4 A fourth adjusting frame 109 is rotatably connected to one side of the second adjusting frame 107 via adjusting bolts. A second belt roller 110 is rotatably connected to one side of the fourth adjusting frame 109. The fourth adjusting frame 109, rotatably connected to one side of the second adjusting frame 107 via adjusting bolts, and the second belt roller 110, rotatably connected to one side of the fourth adjusting frame 109, further increase the adjustability and adaptability of the tensioning device 1. This design allows the position and angle of the second belt roller 110 to be flexibly adjusted as needed, working in conjunction with the first belt roller 106 to more evenly press the fabric and improve sewing quality.

[0046] See Figure 1 , Figure 2 , Figure 3 , Figure 4 A fifth adjusting frame 111 is rotatably connected to one side of the second adjusting frame 107 via adjusting bolts. A sixth adjusting frame 112 is located above one side of the fifth adjusting frame 111. The fifth adjusting frame 111, rotatably connected to one side of the second adjusting frame 107 via adjusting bolts, and the sixth adjusting frame 112 located above one side of the fifth adjusting frame 111, constitute a multi-layered, multi-angle adjusting system. This design allows the tensioning device 1 to adapt to more complex sewing needs, improving the applicability and flexibility of the device. It also facilitates quick adjustments and optimizations by the user according to actual requirements.

[0047] See Figure 1 , Figure 2 , Figure 3 , Figure 4A third belt roller 113 is rotatably connected to one side of the sixth adjusting frame 112. A pressing belt 4 is sleeved between the third belt roller 113, the second belt roller 110, and the first belt roller 106. The third belt roller 113 rotatably connected to one side of the sixth adjusting frame 112, and the pressing belt 4 sleeved between the third belt roller 113, the second belt roller 110, and the first belt roller 106, constitute a complete fabric tensioning system. This design allows the pressing belt 4 to firmly fix the fabric on the worktable 201, effectively preventing the fabric from shifting and wrinkling during the sewing process. At the same time, it also improves sewing efficiency and quality, making the sewing process smoother and more stable.

[0048] See Figure 1 , Figure 2 , Figure 3 , Figure 4 The first belt roller 106 and the second belt roller 110 are pressure rollers, and the third belt roller 113 is a tension roller. The first belt roller 106 and the second belt roller 110, as pressure rollers, are responsible for firmly pressing the fabric onto the worktable 201; while the third belt roller 113, as a tension roller, is responsible for adjusting the tension of the pressure belt 4. This clearly defined division of labor allows each belt roller to play its unique role, jointly ensuring the stable fixing and uniform pressing of the fabric. At the same time, it also improves the reliability and durability of the tensioning device 1, ensuring that it maintains good performance throughout long-term use.

[0049] The implementation principle of this embodiment is as follows: First, the first mounting component 301 is installed at the designated position on the third adjusting frame 108 to ensure that the "U"-shaped structure is firmly attached to the adjusting frame. Simultaneously, the second mounting component 302 is installed at the corresponding position on the fifth adjusting frame 111. Then, the tensioning block 303 is screwed onto both sides of the first mounting component 301 and the second mounting component 302, and tightened using a wrench or screwdriver through the bolt holes 304 and hexagonal slots 305. The first screw 307 and the second screw 309 are installed on the ball seat 306, and the threaded sleeve 308 is screwed between the two screws. By adjusting the position of the threaded sleeve, the tightness of the reinforcing mechanism can be fine-tuned.

[0050] After tightening the support block 303, check its contact with the third adjustment frame 108 and the fifth adjustment frame 111 to ensure a tight fit without looseness. By rotating the threaded sleeve 308, observe the deformation of the first mounting part 301 and the second mounting part 302 to ensure that sufficient support is provided without damaging the adjustment frame due to over-tightening.

[0051] When installing the tensioning device, the first clamping table frame 101 and the second clamping table frame 102 are clamped to the front and rear ends of the workbench 201 respectively, and fixed with clamping bolts 103. The mounting plate 104 is installed on the top of the first clamping table frame 101, and the first adjusting frame 105 is installed by adjusting bolts. The first belt roller 106 is rotatably connected to one side of the first adjusting frame 105. The second adjusting frame 107 is detachably connected to the top of the second clamping table frame 102 by bolts. The fourth adjusting frame 109 and the fifth adjusting frame 111 are rotatably connected to the lower and upper sides of one side of the second adjusting frame 102 by adjusting bolts. The sixth adjusting frame 112 is rotatably connected to the top of the fifth adjusting frame 111 by adjusting bolts. The threaded telescopic rod 115 is rotatably connected to one side of the fifth adjusting frame 111 by rotating block 114. The length of the threaded telescopic rod 115 is adjusted so that the rubber block abuts against the sewing machine 2.

[0052] The tensioning belt 4 is fitted onto the third belt roller 113, the second belt roller 110 and the first belt roller 106. By adjusting the position and angle of the first adjusting frame 105, the second adjusting frame 107, the fourth adjusting frame 109 and the fifth adjusting frame 111, the tensioning belt can evenly tension the fabric.

[0053] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the present invention and are not intended to limit the invention. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and spirit of the present invention, provided that such modifications, substitutions, and variations are within the scope of the claims of the present invention and are protected by patent law.

Claims

1. A fabric tensioning device for a sewing machine, characterized in that: The device includes a tensioning device (1) and a sewing machine (2). The tensioning device (1) includes a first clamping frame (101), a second clamping frame (102), a third adjusting frame (108), and a fifth adjusting frame (111). The third adjusting frame (108) and the fifth adjusting frame (111) are equipped with reinforcing mechanisms (3) on both sides. The reinforcing mechanism (3) includes a first mounting member (301) and a second mounting member (302). The first mounting member (301) is disposed on the third adjusting frame (108), and the second mounting member (302) is disposed on the fifth adjusting frame (111). The first mounting component (301) and the second mounting component (302) are both U-shaped. The first mounting component (301) and the second mounting component (302) are screwed with a support block (303) on both sides, and the support block (303) has a through bolt hole (304). The outer side of the bolt hole (304) is provided with a hexagonal groove (305). The top of the first mounting member (301) and the bottom of the second mounting member (302) are both provided with ball seats (306), and a first screw (307) and a second screw (309) are installed on the two ball seats (306). A threaded sleeve (308) is screwed between the first screw (307) and the second screw (309).

2. The sewing machine fabric tensioning device according to claim 1, characterized in that: After the support block (303) is tightened, it can abut against the third adjustment frame (108) and the fifth adjustment frame (111). The bolt hole (304) is screwed with a fixing bolt.

3. The sewing machine fabric tensioning device according to claim 1, characterized in that: The top of the fifth adjustment frame (111) is rotatably connected to the sixth adjustment frame (112) via an adjustment bolt, and one side of the sixth adjustment frame (112) is rotatably connected to a threaded telescopic rod (115) via a rotating block (114).

4. The sewing machine fabric tensioning device according to claim 3, characterized in that: The bottom of the threaded telescopic rod (115) is provided with a rubber block, and the rubber block abuts against the sewing machine (2).

5. The sewing machine fabric tensioning device according to claim 1, characterized in that: The sewing machine (2) includes a workbench (201), with the sewing machine (2) mounted on the top of the workbench (201). The first clamping frame (101) and the second clamping frame (102) are respectively clamped to the front and rear ends of the workbench (201). The bottom of the first clamping frame (101) and the second clamping frame (102) are screwed with clamping bolts (103). After the clamping bolts (103) are tightened, they are used to fix the first clamping frame (101) and the second clamping frame (102) on the workbench (201). An organism (202) is mounted on the top of the workbench (201).

6. The sewing machine fabric tensioning device according to claim 1, characterized in that: The top of the first clamping table frame (101) is provided with a mounting plate (104), and a first adjusting frame (105) is installed on one side of the mounting plate (104) by adjusting bolts. A first belt roller (106) is rotatably connected to one side of the first adjusting frame (105). The top of the second clamping table frame (102) is detachably connected to a second adjusting frame (107) by bolts.

7. The sewing machine fabric tensioning device according to claim 6, characterized in that: A fourth adjustment frame (109) is rotatably connected to one side of the second adjustment frame (107) via an adjustment bolt, and a second belt roller (110) is rotatably connected to one side of the fourth adjustment frame (109).

8. The sewing machine fabric tensioning device according to claim 6, characterized in that: A fifth adjustment frame (111) is rotatably connected to one side of the second adjustment frame (107) via an adjustment bolt, and a sixth adjustment frame (112) is provided on one side of the fifth adjustment frame (111).

9. The sewing machine fabric tensioning device according to claim 8, characterized in that: A third belt roller (113) is rotatably connected to one side of the sixth adjusting frame (112), and a tensioning belt (4) is sleeved between the third belt roller (113), the second belt roller (110) and the first belt roller (106).

10. The sewing machine fabric tensioning device according to claim 9, characterized in that: The first belt roller (106) and the second belt roller (110) are tensioning rollers, and the third belt roller (113) is a tensioning roller.

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