A pneumatic tension control device for home textiles
By using a roller frame driven by slide rails and cylinders in the pneumatic tension control device for home textiles, combined with the connecting block and locking structure, the complex problem of roller replacement in the prior art is solved, and a more efficient production process and simplified device installation are achieved.
Patent Information
- Application Number
- CN202421524611.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-29
- Publication Date
- 2025-04-04
- Estimated Expiration
- 2034-06-29
AI Technical Summary
In the prior art, the roller replacement process of the tension control device is complicated, which affects production efficiency.
A pneumatic tension control device for home textiles is designed, and a roller frame driven by slide rails and cylinders is used to achieve rapid replacement of rollers through connecting blocks and locking structures.
The roller replacement process is simplified, production efficiency is improved, and the installation process of the device is simplified through cylinder position adjustment.
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Figure CN222714722U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of home textile equipment, in particular to a pneumatic tension control device for home textiles. Background Art
[0002] The tension control system is often a system integration of tension sensors and tension controllers. It is mainly used in metallurgy, papermaking, film, dyeing and finishing, weaving, plastics, wire and other equipment. It is an automatic control system that realizes constant tension or taper tension control. Its main function is to achieve synchronization between rollers and uniform control of winding and unwinding.
[0003] The tension control device is indispensable for realizing the above-mentioned tension control system. The tension control device in the prior art generally consists of a plurality of fixed rollers and a plurality of rollers that can be moved up and down driven by a cylinder or an electric cylinder, so that the film or cloth is driven by the moving rollers to control the film or cloth to be in a taut state, thereby adjusting the tension of the film or cloth.
[0004] For example, the Chinese patent with patent number ZL 201821695925.2 discloses: "A multi-axis synchronous tension control device for textile finishing equipment, including a box body and a feed port, a feed port is provided at the bottom end of one side of the box body, a wire winding box is fixedly installed on one side of the box body, a tension control device is fixedly installed between the wire winding box and the feed port, and the tension control device is composed of a rotating roller, a fixed plate, a No. 1 electric push rod and a connecting plate. The utility model increases the tension through the tension control device, and the wire winding box performs the winding work. The tension control device drives the whole to rotate through the rotating roller, and the outer wall of the rotating roller is fixedly connected to a fixed sleeve. When the fixed sleeve contacts the fabric, the tension of the device is the smallest. The fabric tension is controlled by adjusting the No. 1 electric push rod. The device has a simple structure, is easy to operate, and is convenient to manage. Multi-axis synchronous operation improves the stability of material tension control, reduces manual operation errors, reduces labor intensity, and improves production efficiency."
[0005] However, including the scheme described in the above patent, there is a problem with the tension control devices used in the textile and home textile fields in the prior art, especially the tension control devices used for cloth winding, that is, the rollers in the existing tension control devices are fixed to the roller frames by pressing blocks and bolts, which makes it very troublesome to replace the rollers. In addition, since the material of the textile fabrics produced by the textile mills changes frequently during the production process, the demand for the tension control range provided by the tension control device also changes frequently, and the size of the rollers directly affects the tension control. Therefore, the convenience of replacing the rollers is particularly important. Once the roller replacement efficiency is low, it will directly affect the production efficiency. Summary of the invention
[0006] In order to overcome the disadvantage that the roller replacement process of the tension control device in the prior art is complicated, which will drag down the overall production efficiency, the utility model provides a pneumatic tension control device for home textiles.
[0007] The utility model solves the technical problem by providing a pneumatic tension control device for home textiles, comprising:
[0008] A support frame, comprising a support side plate and a support back plate;
[0009] A slide rail, which is arranged on the front side of the supporting back plate, and a slider is slidably connected to the slide rail;
[0010] A roller frame connected to the slider, wherein a plurality of rollers are rotatably mounted on the roller frame;
[0011] The cylinder is connected to the supporting side plate through a bracket, and the piston rod of the cylinder is connected to the roller frame in a transmission manner. The roller frame can move up and down under the drive of the cylinder.
[0012] Also included are:
[0013] A connection structure, comprising a connection groove provided on a roller frame and connection blocks provided on both sides of the roller, wherein the roller frame is provided with a plurality of through windows, the connection groove is provided on both sides of the through windows, the roller is rotatably connected to the connection block, and the connection block can be engaged and connected in the connection groove, so that the roller can be rotatably mounted in the through windows;
[0014] The locking structure is arranged between the connection groove and the connection block, and acts on the connection groove and the connection block to prevent the two from being separated.
[0015] The specific composition of the locking structure is further that the locking structure includes a locking rod rotatably inserted into the roller frame and a locking groove opened at the bottom of the connecting block, the top of the locking rod is located in the connecting groove, the top of the locking rod can form a plug-in fit with the locking groove, and the locking rod has at least a locked position state and an unlocked position state by rotating;
[0016] When the locking rod is in the locked position, the top of the locking rod forms an interference fit with the locking groove to prevent the locking rod from being disengaged from the locking groove;
[0017] When the locking rod is in the unlocking position, the interference fit between the top of the locking rod and the locking groove is released, and the locking rod can be disengaged from the locking groove.
[0018] The interference structure between the locking rod and the locking groove is further, and interference ribs are protruding on the groove walls on both sides of the locking groove. The interference ribs are located at the groove mouth of the locking groove, and a passing gap is arranged between the two interference ribs. An interference block is also protruding on the top of the locking rod, and the interference block can pass through the passing gap to enter the locking groove, and the interference block can form an interference fit with the interference rib as the locking rod rotates.
[0019] The connection method between the locking rod and the roller frame is further that a transfer hole is opened through the bottom of the connecting groove on the roller frame, the locking rod is inserted into the transfer hole, and a limiting groove is also opened at the bottom of the connecting groove above the transfer hole, and a limiting rib is convexly provided on the circumferential side of the locking rod, and the limiting rib is embedded in the limiting groove.
[0020] The driving method of the bottom of the locking rod is further that a threaded column is protruding from the bottom of the locking rod, and the threaded column is exposed below the roller frame. A knob is also threadedly fitted on the threaded column, and the locking rod can be driven to rotate by turning the knob.
[0021] The replaceable structure of the roller further comprises a replaceable first roller and a second roller, and the diameter of the first roller is greater than the diameter of the second roller.
[0022] The cylinder's translatable structure is further such that the bracket can translate up and down relative to the support frame to drive the cylinder to translate up and down. The bracket is provided with a plurality of threaded holes, and the support side panels are also provided with a plurality of bolt holes arranged in a straight line along the up and down directions. Bolts pass through the bolt holes and are threadedly engaged in the threaded holes to fix the position of the bracket.
[0023] The bracket further has an avoidance structure for the support back plate. The bracket is provided with an avoidance groove, and the lower end of the support back plate extends to the bottom of the bracket through the avoidance groove. As the bracket translates relative to the support frame, the lower end of the support back plate can move relative to the avoidance groove.
[0024] The guide structure for the bracket to move relative to the supporting side plate is further provided with a plurality of guide grooves in the up-down direction on the supporting side plate, and the bracket is provided with guide ribs protruding toward the supporting side plate, the guide ribs are embedded in the guide grooves and can slide along the guide grooves.
[0025] The support frame further has a monitoring structure for the movement of the roller frame, the back side of the support back plate is connected to a track sensor, and the roller frame is connected to a trigger for triggering the track sensor through a mounting plate, and a sensing window is also provided on the support plate from front to back, the mounting plate extends through the sensing window to the rear of the support back plate, and the mounting plate can translate up and down in the sensing window.
[0026] Roller replacement process of the utility model:
[0027] When it is necessary to replace rollers of different sizes, you can first turn the knob under the roller frame to drive the locking rod to rotate from the locked position to the unlocked position. When all the locking rods are switched to the unlocked position, the original roller can be lifted from the fabric window, and the connecting block will be detached from the connecting groove. Then, remove the connecting blocks on both sides of the original roller, and then put the removed connecting blocks on both sides of the roller to be replaced. Then, place the roller to be replaced on the fabric window, and at the same time, make the connecting blocks on both sides of the roller frame embedded in the connecting groove. Finally, turn the knob again to drive the locking rod to switch from the unlocked position to the locked position. At this point, the replacement of the roller is completed.
[0028] The cylinder position adjustment process of the utility model:
[0029] When the support frame is installed on the production line, if the height difference between the roller on the roller frame and the roller on the production line cannot meet the requirements, the position of the cylinder can be adjusted. First, unscrew and remove the bolts used to fix the position between the support frame and the bracket, and then the bracket can be moved up and down. During this process, ensure that the guide rib slides in the guide groove. When the bracket is moved into place and the threaded holes on the bracket are aligned with the other bolt holes on the support side plate again, the bolts can be re-passed through the bolt holes and tightened in the threaded holes to complete the re-fixation of the bracket.
[0030] The beneficial effects of the utility model are:
[0031] 1. The roller is connected to the roller frame through the cooperation of the connecting block and the connecting groove, and the connecting block and the connecting groove are locked through the locking structure. Therefore, when the roller needs to be replaced, it is only necessary to unlock the locking structure and remove the connecting block from the connecting groove, making the roller replacement process simpler and effectively improving the overall production efficiency;
[0032] 2. The locking structure consists of a rotating locking rod and a locking groove on the connecting block. The locking rod can be rotated to interfere with or release the locking groove. Therefore, the locking and unlocking process of the locking structure is also very simple. You only need to turn the knob under the locking rod, which makes the roller replacement process faster and more convenient.
[0033] 3. The bracket for supporting the cylinder is movably arranged relative to the supporting frame. Therefore, when the position of the cylinder needs to be adjusted after the entire tension control device is installed in place, there is no need to adjust the entire tension control device. Only the bracket needs to be moved and adjusted, which makes the adjustment process of the tension control device easier.
[0034] 4. A track sensor for real-time monitoring of the movement of the roller frame is also provided on the support frame, so that intelligent control of the tension control device can be achieved by monitoring the roller frame, so that the tension control device can be better adapted to various intelligent production lines. BRIEF DESCRIPTION OF THE DRAWINGS
[0035] Figure 1 It is a front structural schematic diagram of the utility model.
[0036] Figure 2 It is a schematic diagram of the back structure of the utility model.
[0037] Figure 3 It is an explosion schematic diagram of the utility model.
[0038] Figure 4 It is a schematic diagram of the disassembly of the roller frame and the roller in the utility model.
[0039] Figure 5 It is a schematic diagram of the splitting of the locking rod and the knob in the utility model.
[0040] Figure 6 It is a structural schematic diagram of the locking block in the utility model.
[0041] Figure 7 It is a cross-sectional view of the locking block in two directions of the utility model.
[0042] Figure 8 It is a structural schematic diagram of the roller frame in the utility model.
[0043] Fig. 9 It is a comparative schematic diagram of the first roller and the second roller in the utility model.
[0044] Fig.10 It is a structural schematic diagram of the bracket in the utility model.
[0045] Numbers in the figure: 1. Support side plate; 2. Support back plate; 3. Slide rail; 4. Slider; 5. Roller frame; 6. Roller; 7. Cylinder; 8. Bracket; 9. Connecting groove; 10. Connecting block; 11. Fabric window; 12. Locking rod; 13. Locking groove; 14. Interference rib; 15. Passing gap; 16. Interference block; 17. Adapter hole; 18. Limiting groove; 19. Limiting rib; 20. Threaded column; 21. Knob; 22. First roller; 23. Second roller; 24. Threaded hole; 25. Bolt hole; 26. Avoidance groove; 27. Guide groove; 28. Guide rib; 29. Track sensor; 30. Mounting plate; 31. Trigger; 32. Sensing window. DETAILED DESCRIPTION
[0046] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0047] It should be understood that although the terms upper, middle, lower, top, end, etc. appear in this article to describe various elements, these elements are not limited by these terms. These terms are only used to distinguish elements from each other for easy understanding, and are not used to define any direction or order limitation.
[0048] Example
[0049] Combination Figures 1 to 10 The pneumatic tension control device for home textiles shown in the figure comprises a support frame, a slide rail 3, a roller frame 5 and a cylinder 7; the support frame comprises a support side plate 1 and a support back plate 2; the slide rail 3 is arranged on the front of the support back plate 2, and a slider 4 is slidably connected to the slide rail 3; the roller frame 5 is connected to the slider 4, and a plurality of rollers 6 are rotatably mounted on the roller frame 5; the cylinder 7 is connected to the support side plate 1 through a bracket 8, and the piston rod of the cylinder 7 is in transmission connection with the roller frame 5, and the roller frame 5 can be translated up and down under the drive of the cylinder 7. ; It also includes a connecting structure and a locking structure; the connecting structure includes a connecting groove 9 opened on the roller frame 5 and connecting blocks 10 arranged on both sides of the roller 6, and a plurality of through windows are opened through the roller frame 5, and the connecting groove 9 is arranged on both sides of the through window, and the roller 6 is rotatably connected with the connecting block 10, and the connecting block 10 can be embedded and connected in the connecting groove 9 so that the roller 6 can be rotatably mounted in the through window; the locking structure is arranged between the connecting groove 9 and the connecting block 10, and acts on the connecting groove 9 and the connecting block 10 to prevent the two from separating.
[0050] Combination Figures 1 to 4 As shown, in this embodiment, two cloth windows 11 are provided on the roller frame 5 .
[0051] Combination Figures 4 to 6 As shown, in this embodiment, the locking structure includes a locking rod 12 rotatably inserted into the roller frame 5 and a locking groove 13 opened at the bottom of the connecting block 10, the top of the locking rod 12 is located in the connecting groove 9, the top of the locking rod 12 can form a plug-in fit with the locking groove 13, and the locking rod 12 has at least a locked position state and an unlocked position state through rotation; when the locking rod 12 is in the locked position state, the top of the locking rod 12 forms an interference fit with the locking groove 13 to prevent the locking rod 12 from escaping from the locking groove 13; when the locking rod 12 is in the unlocked position state, the interference fit between the top of the locking rod 12 and the locking groove 13 is released, and the locking rod 12 can escaping from the locking groove 13.
[0052] Combination Figures 5 to 7 As shown, in this embodiment, interference ribs 14 are further protruding on the groove walls on both sides of the locking groove 13, and the interference ribs 14 are located at the notch of the locking groove 13. A through gap 15 is provided between the two interference ribs 14, and an interference block 16 is further protruding from the top of the locking rod 12. The interference block 16 can pass through the through gap 15 to enter the locking groove 13, and the interference block 16 can form an interference fit with the interference rib 14 as the locking rod 12 rotates.
[0053] Combination Figure 5 and Figure 8 As shown, in this embodiment, a transfer hole 17 is formed through the bottom of the connecting groove 9 on the roller frame 5, and the locking rod 12 is inserted into the transfer hole 17. A limiting groove 18 is also formed at the bottom of the connecting groove 9 above the transfer hole 17, and a limiting rib 19 is convexly provided on the circumferential side of the locking rod 12, and the limiting rib 19 is engaged in the limiting groove 18.
[0054] Among them Figure 5 As shown, in this embodiment, a threaded column 20 is protruding from the bottom of the locking rod 12, and the threaded column 20 is exposed below the roller frame 5. A knob 21 is also threadedly fitted on the threaded column 20, and the locking rod 12 can be driven to rotate by rotating the knob 21.
[0055] Among them Fig. 9 As shown, the roller 6 described in this embodiment includes a replaceable first roller 22 and a second roller 23 , and the diameter of the first roller 22 is greater than the diameter of the second roller 23 .
[0056] Combination Figure 3 and Fig.10 As shown, the bracket 8 described in this embodiment can translate up and down relative to the support frame to drive the cylinder 7 to translate up and down. A plurality of threaded holes 24 are provided on the bracket 8, and a plurality of bolt holes 25 are arranged in a straight line along the up and down directions on the support side plate 1. Bolts pass through the bolt holes 25 and are threadedly engaged in the threaded holes 24 to fix the position of the bracket 8.
[0057] Combination Figure 3 and Fig.10 As shown, in this embodiment, the bracket 8 is provided with two rows of parallel threaded holes 24, and each row of threaded holes 24 has three threaded holes 24 arranged in a straight line at equal distances. The supporting side plate 1 is also provided with two rows of parallel bolt holes 25, and each row of bolt holes 25 has six bolt holes 25 arranged in a straight line at equal distances.
[0058] Combination Figure 3 and Fig.10 As shown, an avoidance groove 26 is opened through the bracket 8 described in this embodiment, and the lower end of the support back plate 2 passes through the avoidance groove 26 and extends to the bottom of the bracket 8. As the bracket 8 translates relative to the support frame, the lower end of the support back plate 2 can move relative to the avoidance groove 26.
[0059] Combination Figure 3 and Fig.10 As shown, in this embodiment, the support side plate 1 is further provided with a plurality of guide grooves 27 in the up-down direction, and the bracket 8 is provided with guide ribs 28 protruding toward the support side plate 1 . The guide ribs 28 are embedded in the guide grooves 27 and can slide along the guide grooves 27 .
[0060] Combination Figure 2 and Figure 3 As shown, in this embodiment, a track sensor 29 is connected to the back of the support back plate 2, and a trigger 31 for triggering the track sensor 29 is connected to the roller frame 5 through a mounting plate 30. A sensing window 32 is also provided on the support plate from front to back, and the mounting plate 30 extends to the rear of the support back plate 2 through the sensing window 32, and the mounting plate 30 can translate up and down in the sensing window 32.
[0061] The roller 6 replacement process of this embodiment:
[0062] When it is necessary to replace rollers 6 of different sizes, the knob 21 located below the roller frame 5 can be turned first to drive the locking rod 12 to rotate from the locked position to the unlocked position. When all the locking rods 12 are switched to the unlocked position, the original roller 6 can be lifted out of the fabric window 11, and the connecting block 10 will be disengaged from the connecting groove 9. Then, the connecting blocks 10 on both sides of the original roller 6 are removed, and the removed connecting blocks 10 are sleeved on both sides of the roller 6 to be replaced. Then, the roller frame 5 to be replaced is set on the fabric window 11, and the connecting blocks 10 on both sides are embedded in the connecting groove 9 of the roller frame 5. Finally, the knob 21 is turned again to drive the locking rod 12 to switch from the unlocked position to the locked position. At this point, the replacement of the roller 6 is completed.
[0063] The position adjustment process of the cylinder 7 in this embodiment:
[0064] When the support frame is installed on the production line, if the height difference between the roller 6 on the roller frame 5 and the roller 6 on the production line cannot meet the requirements, the position of the cylinder 7 can be adjusted. First, the bolts used to fix the position between the support frame and the bracket 8 are unscrewed and removed, and then the bracket 8 can be moved up and down. During this process, ensure that the guide rib 28 slides in the guide groove 27. When the bracket 8 moves into place and the threaded hole 24 on the bracket 8 is aligned with the other bolt holes 25 on the supporting side plate 1 again, the bolt can be re-passed through the bolt hole 25 and tightened in the threaded hole 24 to complete the re-fixation of the bracket 8.
[0065] The advantages of this embodiment are: the roller replacement process is simple and clear, which effectively improves the overall production efficiency, and after the tension control device is installed in place, the position of the cylinder can also be adjusted, which simplifies the installation process of the tension control device.
[0066] The above specific embodiments are merely explanations of the present invention and are not limitations of the present invention. After reading this specification, those skilled in the art may make modifications to the embodiments without any creative contribution as needed. However, as long as they are within the scope of the claims of the present invention, they are protected by the patent law.
Claims
1. A pneumatic tension control device for home textiles, comprising: A support frame, comprising a support side plate (1) and a support back plate (2); A slide rail (3) is arranged on the front side of the supporting back plate (2), and a slider (4) is slidably connected to the slide rail (3); A roller frame (5) connected to the slider (4), wherein a plurality of rollers (6) are rotatably mounted on the roller frame (5); A cylinder (7) is connected to the supporting side plate (1) via a bracket (8); a piston rod of the cylinder (7) is in transmission connection with the roller frame (5); and the roller frame (5) can move up and down under the drive of the cylinder (7); It is characterized in that Also included are: A connection structure, comprising a connection groove (9) provided on a roller frame (5) and connection blocks (10) arranged on both sides of a roller (6); a plurality of cloth windows (11) are provided through the roller frame (5); the connection groove (9) is arranged on both sides of the cloth window (11); the roller (6) and the connection block (10) are rotatably connected; the connection block (10) can be engaged and connected in the connection groove (9) so that the roller (6) can be rotatably mounted in the cloth window (11); The locking structure is arranged between the connection groove (9) and the connection block (10), and acts on the connection groove (9) and the connection block (10) to prevent the two from being separated.
2. A pneumatic tension control device for home textiles according to claim 1, characterized in that: The locking structure comprises a locking rod (12) rotatably inserted into the roller frame (5) and a locking groove (13) provided at the bottom of the connecting block (10); the top of the locking rod (12) is located in the connecting groove (9); the top of the locking rod (12) can be plugged into the locking groove (13); and the locking rod (12) has at least a locked position state and an unlocked position state by rotating; When the locking rod (12) is in a locked position, the top of the locking rod (12) forms an interference fit with the locking groove (13) to prevent the locking rod (12) from being disengaged from the locking groove (13); When the locking rod (12) is in the unlocking position, the interference fit between the top of the locking rod (12) and the locking groove (13) is released, and the locking rod (12) can be disengaged from the locking groove (13).
3. A pneumatic tension control device for home textiles according to claim 2, characterized in that: Interference ribs (14) are also protrudingly provided on the groove walls on both sides of the locking groove (13), and the interference ribs (14) are located at the notch of the locking groove (13). A passing gap (15) is provided between the two interference ribs (14). An interference block (16) is also protrudingly provided on the top of the locking rod (12), and the interference block (16) can pass through the passing gap (15) to enter the locking groove (13), and the interference block (16) can form an interference fit with the interference rib (14) as the locking rod (12) rotates.
4. A pneumatic tension control device for home textiles according to claim 2, characterized in that: The roller frame (5) is provided with a transfer hole (17) at the bottom of the connecting groove (9), the locking rod (12) is inserted into the transfer hole (17), the bottom of the connecting groove (9) is provided with a limiting groove (18) above the transfer hole (17), and the locking rod (12) is provided with a limiting rib (19) on the circumference, and the limiting rib (19) is engaged with the limiting groove (18).
5. A pneumatic tension control device for home textiles according to claim 2, characterized in that: A threaded column (20) is protruding from the bottom of the locking rod (12), and the threaded column (20) is exposed below the roller frame (5). A knob (21) is also threadedly engaged on the threaded column (20), and the locking rod (12) can be driven to rotate by rotating the knob (21).
6. A pneumatic tension control device for home textiles according to claim 2, characterized in that: The roller (6) comprises a replaceable first roller (22) and a second roller (23), wherein the diameter of the first roller (22) is greater than the diameter of the second roller (23).
7. A pneumatic tension control device for home textiles according to claim 1, characterized in that: The bracket (8) can translate up and down relative to the support frame to drive the cylinder (7) to translate up and down. The bracket (8) is provided with a plurality of threaded holes (24). The support side plate (1) is also provided with a plurality of bolt holes (25) arranged in a straight line along the up and down direction. Bolts pass through the bolt holes (25) and are threadedly engaged in the threaded holes (24) to achieve the fixing of the position of the bracket (8).
8. A pneumatic tension control device for home textiles according to claim 7, characterized in that: The bracket (8) is provided with an escape groove (26), and the lower end of the support back plate (2) passes through the escape groove (26) and extends to the bottom of the bracket (8). As the bracket (8) translates relative to the support frame, the lower end of the support back plate (2) can move relative to the escape groove (26).
9. A pneumatic tension control device for home textiles according to claim 7, characterized in that: The supporting side plate (1) is also provided with a plurality of guide grooves (27) in the up-down direction, and the bracket (8) is provided with guide ribs (28) protruding toward the supporting side plate (1). The guide ribs (28) are embedded in the guide grooves (27) and can slide along the guide grooves (27).
10. A pneumatic tension control device for home textiles according to claim 1, characterized in that: The back of the support back plate (2) is connected to a track sensor (29); a trigger (31) for triggering the track sensor (29) is connected to the roller frame (5) via a mounting plate (30); a sensing window (32) is also provided on the support back plate from front to back; the mounting plate (30) passes through the sensing window (32) and extends to the rear of the support back plate (2); and the mounting plate (30) can translate up and down in the sensing window (32).
Citation Information
Patent Citations
The utility model discloses a multi-axis synchronous tension control device of textile finishing equipment
CN208898187U