Warp let-off device and warp let-off method of rapier loom

Abstract

The invention discloses a let-off device and a let-off method of a rapier loom, and relates to the technical field of rapier looms. The let-off device of the rapier loom comprises an outer frame and further comprises a let-off assembly arranged at the tail of the outer frame. The tension adjusting assembly is arranged on the inner side of the outer frame and used for adjusting the tension after the warp yarn is output; the tension adjusting assembly comprises a box body fixed to the lower end in the outer frame, and bearing seats are installed at the upper end of the box body at equal intervals. Through cooperation of a guide wheel, a lifting rod and a first piston, microcosmic tension fluctuation of warp is converted into hydraulic change of liquid in a U-shaped cavity, then the hydraulic change is transmitted to a liquid storage cavity through a communicating pipe, a second piston and a permanent magnet are driven to move, and then a magnetic repulsive force balance point between the second piston and a fixed electromagnet is changed; the tension change caused by warp let-off speed fluctuation, warp yarn friction or raw material unevenness can be responded in real time, the response is smooth, mechanical hysteresis is avoided, and the phenomenon that a traditional spring or a balance weight type tensioner is prone to oscillation or overregulation is effectively avoided.

Description

Technical Field

[0001] This invention relates to the field of rapier loom technology, specifically to a warp feeding device and method for a rapier loom. Background Technology

[0002] As the most representative shuttleless weaving equipment in modern textile industry, the rapier loom's popularity and wide application have been widely recognized in the industry worldwide. This type of loom not only inherits the high efficiency, high speed, and high automation common to the shuttleless loom family, but also exhibits excellent process compatibility due to its unique weft insertion mechanism. Whether it's delicate and fragile natural fibers, strong and smooth synthetic fibers, or complex blended and fancy yarns, all can achieve precise weft insertion and connection under the stable grip of the rapier head, thus greatly expanding the range of yarns and fabrics that can be processed. The boundaries of types are particularly noteworthy. The technical superiority of rapier looms in the face of multi-color weft yarn weaving tasks makes them an indispensable core equipment in the production of high-end yarn-dyed fabrics. They can easily handle intricate color schemes and pattern structures, satisfying the market's diversified pursuit of the visual aesthetics and artistic value of textiles. With the continuous deepening of the textile industry's technological upgrading and equipment iteration process, shuttle looms are gradually withdrawing from the historical stage, while shuttleless looms, especially rapier looms, are steadily establishing their dominant position in the mainstream production system of woven fabrics due to their comprehensive performance advantages.

[0003] Chinese patent application CN215404807U discloses a tension regulating warp feeding device for a rapier loom. In this structure, when the regulating rod rotates, the end of the regulating rod with an external thread rotates in the threaded hole, thereby causing the regulating rod to move relative to the base. When the regulating rod moves, it drives the drive arm to move together. The drive arm causes the position of the regulating frame to change, so that the rotating arm rotates around the hinge point on the mounting base, thereby completing the position adjustment of the regulating frame and the tension regulating roller on the regulating frame, and changing the tension of the warp yarn on the tension regulating roller.

[0004] However, since traditional guide rollers are mostly installed in a rigid and fixed manner, they lack the necessary buffering and adaptive adjustment capabilities. When the warp yarn encounters abnormal stretching, it is very easy to generate severe friction with the roller surface. This not only accelerates the wear of the fibers on the yarn surface, but also leads to an increase in the yarn breakage rate, which seriously affects the continuity of production. More in-depth, such structures generally lack the ability to independently control individual warp yarns. Once a certain yarn becomes loose or too tight, it will affect the uniformity of the overall warp tension distribution, which in turn will cause defects such as cloudiness and streaks on the fabric surface, seriously affecting the quality of the finished product. In addition, during the process of the warp yarn passing through the reed and moving up and down with it to form the shed, traditional devices often ignore the implicit tension fluctuations caused by changes in path length. This seemingly minor geometric factor will be amplified into a key variable affecting the overall operational stability in actual high-speed weaving. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a warp feeding device and method for a rapier loom, solving the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a warp feeding device for a rapier loom, comprising an outer frame and a warp feeding assembly located at the tail of the outer frame; a tension adjusting assembly located inside the outer frame for adjusting the tension after the warp yarns are output; the tension adjusting assembly comprises: a housing fixed to the lower end of the outer frame, with bearing seats evenly spaced on its upper end, a connecting shaft rotatably mounted inside the bearing seats, and a guide wheel fixed on one side of the connecting shaft; a U-shaped cavity located inside the housing and corresponding to the bearing seats, with lifting rods symmetrically fixed on the bearing seats, the lower end of the lifting rods extending into the U-shaped cavity and fitted with a first piston; a liquid storage cavity located inside the housing and in the middle of the U-shaped cavity, with a connecting pipe communicating with the U-shaped cavity at its lower end, an electromagnet fixed at the upper end of the liquid storage cavity, and a second piston slidably mounted inside the liquid storage cavity, with a permanent magnet repelling the electromagnet fixed at the upper end of the second piston; and an adjusting roller located above the housing.

[0007] Furthermore, it also includes guide rollers, symmetrically arranged at one end of the outer frame, with the gap between the two guide rollers used for guiding the warp output; arc-shaped frames, symmetrically installed on both sides of the outer frame, with sliding sleeves slidably installed on them, the two sets of sliding sleeves being centrally symmetrical about the midpoint of the line connecting the two arc-shaped frames; a fixing rod is fixed to one side of each sliding sleeve, and arc-shaped reeds are installed at equal intervals on the fixing rod; wherein, the arc-shaped reeds on the two sets of fixing rods are staggered, and the gap between the two sets of guide rollers coincides with the central axis of the arc-shaped frame and the arc-shaped reed.

[0008] Furthermore, a movable plate is fixed at the middle end of the sliding sleeve, and the other end of the movable plate is hinged to the outer frame. The hinge point coincides with the central axis of the arc corresponding to the arc of the arc frame and the arc reed. A through groove is opened in the middle of the movable plate, and a slider is slidably installed in the through groove. A movable rod is rotatably installed on one side of the slider.

[0009] Furthermore, a dual-axis motor is fixed at the bottom of the outer frame, and a drive shaft is provided at the output end of the dual-axis motor. A fourth pulley is installed on the drive shaft. A pin is rotatably installed on the outer frame. One end of the pin is fixedly connected to the movable rod, and a fifth pulley is fixed at the other end of the pin. A second transmission belt is provided between the fifth pulley and the fourth pulley.

[0010] Furthermore, the warp feeding assembly includes a warp feeding shaft rotatably mounted within the outer frame, with equally spaced isolation discs on the warp feeding shaft, and a fixing slot is provided on the surface of the warp feeding shaft, with a fixing strip fixed in the fixing slot by bolts.

[0011] Furthermore, one end of the warp feed shaft passes through the outer frame and is equipped with a first pulley, one end of a drive shaft passes through the outer frame and is equipped with a second pulley, a transmission shaft is rotatably mounted on the outer frame, one end of the transmission shaft is provided with a third pulley, and a first transmission belt is provided between the first pulley, the second pulley, and the third pulley.

[0012] Furthermore, a groove is provided on one side of the guide wheel, and guide blocks that are slidably connected to the adjacent groove are provided on the other side of the connecting shaft and the transmission shaft.

[0013] Furthermore, a tension detection roller is installed on the inner side of the outer frame, and the tension detection roller is located between the adjusting roller and the guide roller.

[0014] Furthermore, lead screws are rotatably mounted on both sides of the outer frame, and stroke slides are threadedly connected to the lead screws. One end of the stroke slide is vertically slidably connected to the outer frame, and both ends of the adjusting roller are rotatably connected to the stroke slides. A motor for driving the adjusting roller to rotate is fixed on the outside of one of the stroke slides. A transmission box is fixed at the upper end of the outer frame, and a drive assembly is provided inside the transmission box. The drive assembly is used to drive the lead screw to rotate synchronously.

[0015] The present invention also provides a warp feeding method for a rapier loom, applicable to a warp feeding device for a rapier loom, comprising the following steps: S1. Adjust the height of the adjusting roller; S2. Wrap the warp yarn around two adjacent warp feed assemblies, and adjust the tension of each warp yarn individually through the tension adjustment assembly at the other end of the warp yarn; S3, and apply power to the warp yarns to transport them.

[0016] The present invention has the following beneficial effects: (1) The warp feeding device and method of the rapier loom, through the cooperation of the guide wheel, the lifting rod and the first piston, converts the micro tension fluctuation of the warp yarn into the hydraulic change of the liquid in the U-shaped cavity, and then transmits it to the liquid storage chamber through the connecting pipe, driving the displacement of the second piston and the permanent magnet, thereby changing the magnetic repulsion balance point between them and the fixed electromagnet. It can respond in real time to the tension changes caused by the fluctuation of the warp feeding speed, the friction of the warp yarn or the unevenness of the raw materials. Its response is smooth and without mechanical lag, effectively avoiding the oscillation or over-adjustment phenomenon that is easy to occur in traditional spring or counterweight tensioners. In addition, by adjusting the excitation current of the electromagnet, the basic tension threshold can be flexibly set, so that the same device can be adapted to a wide range of warp yarn characteristics from fine filaments to coarse and tough blended yarns, significantly improving the adaptability and stability of the equipment in the production of diverse fabrics.

[0017] (2) The warp feeding device and method of the rapier loom, through the cooperation of the guide wheel, the lifting rod and the first piston, combined with the hydraulic transmission mechanism of the U-shaped cavity and the liquid storage cavity, realizes the independent and precise control of the tension of a single warp yarn. When the tension of a certain warp yarn fluctuates locally, the corresponding guide wheel drives the first piston to move in the U-shaped cavity through the lifting rod, thereby changing the flow state of the liquid in the connecting pipe, pushing the position of the second piston and the permanent magnet relative to the electromagnet in the liquid storage cavity, and adjusting the balance height of the guide wheel in real time through the change of magnetic repulsion, so that the tension of each warp yarn can be independently adjusted according to its actual state, avoiding the problem of mutual interference between warp yarns caused by the overall tension adjustment in the traditional system.

[0018] (3) The warp feeding device and method of the rapier loom, by combining the sliding sleeve, the fixed rod, the arc frame and the arc reed, ensures that the path length of the warp yarn is kept constant during the opening process, eliminates the problem of periodic loosening or tightening of the warp yarn caused by the up and down translation of the traditional reed, and greatly improves the surface quality of the fabric.

[0019] (4) The warp feeding device and warp feeding method of the rapier loom: the guide wheel achieves synchronous rotation under the drive of the transmission shaft through the sliding cooperation of the guide block and the guide groove, while retaining its independent floating ability in the vertical direction. This ensures that even during high-speed warp feeding, each guide wheel can adjust its height in real time according to the tension change of its corresponding warp yarn, without affecting the operation of adjacent guide wheels.

[0020] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 In this invention Figure 1 Another perspective view; Figure 3 In this invention Figure 2 Top view; Figure 4 This is a schematic diagram of the internal structure of the present invention; Figure 5 For the present invention Figure 4 Enlarged view of point A in the middle; Figure 6 This is a schematic diagram of the installation structure of the housing in this invention; Figure 7 This is a schematic diagram of the installation structure of the arc-shaped reed in this invention; Figure 8 This is a schematic diagram of the installation structure of the guide wheel in this invention; Figure 9 This is a schematic diagram of the connection structure between two adjacent guide wheels in this invention; Figure 10 This is a schematic diagram of the structure of the warp delivery component in this invention; Figure 11 This is a schematic diagram of the warp yarn installation structure in this invention.

[0022] In the diagram, 1. Outer frame; 2. Warp feed beam; 3. Fixed slot; 4. Isolation disc; 5. Fixing strip; 6. Transmission box; 7. Guide roller; 8. Arc frame; 9. Sliding sleeve; 10. Warp yarn; 11. Dual-axis motor; 12. Drive shaft; 13. First pulley; 14. Second pulley; 15. Third pulley; 16. First transmission belt; 17. Second transmission belt; 18. Fixed rod; 19. Arc reed; 20. Tension detection roller; 21. Lead screw; 22. Stroke slide; 23. Drive shaft; 24. First bevel gear; 25. Second bevel gear; 26. Fourth pulley; 27. Motor; 28. Pin; 29. ​​Fifth pulley; 30. Movable plate; 31. Through groove; 32. Slider; 33. Movable rod; 34. Adjusting roller; 35. Housing; 36. Guide wheel; 37. Bearing seat; 38. Lifting rod; 39. U-shaped cavity; 40. Liquid storage cavity; 41. Connecting pipe; 42. First piston; 43. Second piston; 44. Permanent magnet; 45. Electromagnet; 46. Connecting shaft; 47. Slide groove; 48. Guide block; 49. Drive shaft. Detailed Implementation

[0023] 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.

[0024] In the description of this invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inner", "around", etc., which indicate orientation or positional relationship, are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting this invention.

[0025] The following is based on Figure 1 - Figure 11 This invention describes the warp feeding device and method for a rapier loom provided in an embodiment of the invention.

[0026] Please refer to Figure 1 - Figure 11 The present invention provides a technical solution: a warp feeding device for a rapier loom, including an outer frame 1 and a warp feeding component. The warp feeding component is located at the tail of the outer frame 1. Before use, the warp feeding component can reverse the warp yarn 10 to complete the winding, so as to facilitate the subsequent feeding of the warp yarn 10.

[0027] To achieve tension adjustment during the warp yarn 10 feeding process, the warp feeding device of the rapier loom provided in this embodiment also includes a tension adjustment component. The tension adjustment component is located inside the outer frame 1 and is used for tension adjustment after the warp yarn 10 is output. The tension adjustment component includes a housing 35, a liquid storage chamber 40, and an adjustment roller 34. The housing 35 is fixed to the lower end inside the outer frame 1, and bearing seats 37 are installed at equal intervals on its upper end. A connecting shaft 46 is rotatably installed inside the bearing seat 37. A guide wheel 36 is fixed on one side of the connecting shaft 46. The guide wheel 36 is used to pull the warp yarn 10 output by the warp feeding component. A U-shaped cavity 39 is located inside the housing 35 and corresponds to the bearing seat 37. Symmetrical fixed... A lifting rod 38 is fixed, the lower end of which extends into the U-shaped cavity 39 and is fitted with a first piston 42. A liquid storage cavity 40 is located inside the housing 35 and in the middle of the U-shaped cavity 39. Its lower end is provided with a connecting pipe 41 that communicates with the U-shaped cavity 39. An electromagnet 45 is fixed at the upper end of the liquid storage cavity 40, and a second piston 43 is slidably installed inside the liquid storage cavity 40. A permanent magnet 44 that repels the electromagnet 45 is fixed at the upper end of the second piston 43. An adjusting roller 34 is located above the housing 35. It should be noted that the upper end of the U-shaped cavity 39 and the upper end of the liquid storage cavity 40 are connected through an air hole to maintain the air pressure balance between the non-liquid parts of the U-shaped cavity 39 and the liquid storage cavity 40, thereby avoiding the influence of air pressure.

[0028] Before use, the magnetic output of the electromagnet 45 needs to be adjusted to control the height of the second piston 43 inside the liquid storage chamber 40, thereby controlling the height of the guide wheel 36 and maintaining a stable tension of the warp yarn 10 on the guide wheel 36. When the tension of the warp yarn 10 decreases, the warp yarn 10 exerts no tension on the guide wheel 36 and the bearing seat 37. Under the gravity of the guide wheel 36 and the bearing seat 37, the lifting rod 38 moves downward, thereby causing the first piston 42 to squeeze the liquid inside the U-shaped cavity 39 and allow the liquid to flow into the liquid storage chamber 40 through the connecting pipe 41. This causes the second piston 43 to drive the permanent magnet. Iron 44 slides toward electromagnet 45, causing the repulsive force to gradually increase until the second piston 43 stabilizes. When the tension of warp 10 increases, the guide wheel 36 and bearing seat 37 are pulled upward by the warp 10, and under the action of hydraulic pressure, the liquid column inside the reservoir 40 drops, further causing the second piston 43 to drive the permanent magnet 44 to slide away from the electromagnet 45, causing the repulsive force to gradually decrease until the second piston 43 stabilizes. When the tension deviates from the set value, the displacement of the guide wheel 36 triggers hydraulic changes, thereby changing the magnetic balance point and causing the tension to return to a stable state.

[0029] By utilizing the combined effects of gravity, hydraulic pressure, and magnetism, when the tension of the warp yarn 10 changes, the position adjustment of the guide wheel 36 is transmitted to the first piston 42 via the lifting rod 38, thereby changing the hydraulic distribution within the U-shaped cavity 39. The automatic tension adjustment is achieved by balancing the incompressibility of the fluid and the repulsive force of the magnetic field. The magnetic output of the electromagnet 45 can be adjusted in real time as needed to cope with the dynamic tension fluctuations of the warp yarn 10. In addition, the connection between the U-shaped cavity 39 and the liquid storage cavity 40 ensures responsiveness, while the presence of air holes eliminates the influence of air pressure changes on the adjustment accuracy, thus ensuring the accuracy and stability of tension feedback.

[0030] like Figure 1 , Figure 2 , Figure 4 , Figure 5 , Figure 6 and Figure 7As shown, since the warp yarn 10 moves up and down during the formation of the shed, causing tension changes, to prevent this from happening, the warp feeding device of the rapier loom provided in this embodiment also includes guide rollers 7 and arc-shaped frames 8. The guide rollers 7 are symmetrically arranged at one end of the outer frame 1, and the gap between the two guide rollers 7 is used for guiding the output of the warp yarn 10. Preferably, the guide rollers 7 are detachable to facilitate the warp yarn 10 passing through the gap between the two guide rollers 7, which is beneficial for the installation of the warp yarn 10. The arc-shaped frames 8 are symmetrically installed on both sides of the outer frame 1, and sliding sleeves 9 are slidably installed on the arc-shaped frames 8. The two sets of sliding sleeves 9 are centrally symmetrical about the midpoint of the line connecting the two arc-shaped frames 8. Fixing rods 18 are fixed on the opposite sides of the two sets of sliding sleeves 9. Arc-shaped reeds 19 are installed at equal intervals on the fixing rods 18. The fixing rods 18 are also centrally symmetrical about the midpoint of the line connecting the two arc-shaped frames 8. The arc-shaped reeds 19 on the fixed rod 18 are staggered vertically, and the gap between the two sets of guide rollers 7 coincides with the central axis of the arc-shaped frame 8 and the arc-shaped reed 19. Based on the geometric characteristics of the arc motion, it ensures that the warp yarns 10 maintain a constant path length during the shed formation process, eliminating tension fluctuations caused by length changes. Specifically, when the sliding sleeve 9 slides back and forth on the arc-shaped frame 8, the sliding sleeve 9 drives the corresponding fixed rod 18 to move, further causing the arc-shaped reed 19 to move, so that the warp yarns 10 on the other end of the arc-shaped reed 19 alternately form the shed. Since the arc-shaped reed 19 rotates with the center of the arc corresponding to its arc as the axis, the length of the warp yarns 10 pulled by the arc-shaped reed 19 will not change when forming the shed, thereby avoiding tension changes in the warp yarns 10 when forming the shed.

[0031] like Figure 4 , Figure 5 and Figure 7 As shown, in order to realize the reciprocating motion of the sliding sleeve 9 on the arc frame 8, the sliding sleeve 9 provided in this embodiment has a movable plate 30 fixed in the middle. The other end of the movable plate 30 is hinged to the outer frame 1, and the hinge point coincides with the central axis of the arc of the arc frame 8 and the arc reed 19. A through groove 31 is opened in the middle of the movable plate 30. A slider 32 is slidably installed in the through groove 31. A movable rod 33 is rotatably installed on one side of the slider 32. A dual-axis motor 11 is fixed at the bottom inside the outer frame 1. A drive shaft 12 is provided at the output end of the dual-axis motor 11. A fourth pulley 26 is installed on the drive shaft 12. A pin 28 is rotatably installed on the outer frame 1. One end of the pin 28 is fixedly connected to the movable rod 33, and the other end of the pin 28 is fixed to a fifth pulley 29. A second transmission belt 17 is provided between the fifth pulley 29 and the fourth pulley 26.

[0032] Driven by the dual-axis motor 11, the drive shaft 12 drives the fourth pulley 26 to rotate. Through the second transmission belt 17, the fifth pulley 29 rotates synchronously, further causing the pin 28 to rotate. The pin 28 drives the movable rod 33 to rotate. Through the rotation of the movable rod 33, the slider 32 slides inside the through groove 31, further pushing the movable plate 30 to swing, thereby realizing the reciprocating motion of the sliding sleeve 9 on the arc frame 8. By utilizing the kinematic characteristics of the crank-slider mechanism, the eccentric rotation of the movable rod 33 drives the slider 32 to slide linearly in the through groove 31, thereby pushing the movable plate 30 to swing around the hinge point, realizing the reciprocating motion of the sliding sleeve 9. Its periodicity matches the weft insertion rhythm of the loom, which helps to maintain the stability of the warp yarn tension 10.

[0033] like Figure 6 and Figure 10 As shown, in order to facilitate the installation of the warp yarn 10, the warp feeding assembly provided in this embodiment includes a warp feeding shaft 2 rotatably installed in the outer frame 1. Isolation discs 4 are provided at equal intervals on the warp feeding shaft 2, and a fixing groove 3 is opened on the surface of the warp feeding shaft 2. A fixing strip 5 is fixed in the fixing groove 3 by bolts.

[0034] By using mechanical clamping and regional isolation, each warp yarn 10 is wound independently to avoid mutual interference. When installing the warp yarn 10, one end of the warp yarn 10 is placed between two adjacent isolation discs 4 and fixed at one end by fixing strips 5. The warp feed shaft 2 is controlled to rotate in the opposite direction to realize the winding of the warp yarn 10, so as to facilitate the subsequent output of the warp yarn 10.

[0035] like Figure 1 and Figure 4 As shown, to facilitate the driving of the warp feed shaft 2, a first pulley 13 is installed through the outer frame 1 at one end of the warp feed shaft 2. A second pulley 14 is installed through the outer frame 1 at one end of the drive shaft 1. A transmission shaft 49 is rotatably installed on the outer frame 1. A third pulley 15 is provided at one end of the transmission shaft 49. A first transmission belt 16 is provided between the first pulley 13, the second pulley 14, and the third pulley 15.

[0036] The second pulley 14 is driven to rotate by the drive shaft 12, and the first pulley 13 and the third pulley 15 are rotated synchronously by the first transmission belt 16, which further rotates the warp feed shaft 2 to realize the conveying of warp yarn 10.

[0037] like Figure 1 , Figure 4 and Figure 9As shown, in order to drive the guide wheel 36 and reduce the friction between the guide wheel 36 and the warp yarn 10, a groove 47 is provided on one side of the guide wheel 36. Guide blocks 48 that are slidably connected to the adjacent groove 47 are provided on the other side of the connecting shaft 46 and the transmission shaft 49. The guide blocks 48 drive the guide wheel 36 to rotate through the transmission shaft 49. Since the height of the guide wheel 36 is uncertain, the guide blocks 48 slide inside the groove 47 to achieve synchronous driving of two adjacent sets of guide wheels 36.

[0038] like Figure 4 and Figure 8 As shown, in order to realize tension detection during the conveying of warp yarn 10, a tension detection roller 20 is installed on the inner side of the outer frame 1. The tension detection roller 20 is located between the adjusting roller 34 and the guide roller 7. Optionally, the tension detection roller 20 is equipped with pressure sensors that correspond one-to-one with the warp yarn 10 and the guide wheel 36. The pressure sensor feeds back the pressure signal to control the magnetic output of the electromagnet 45, thereby controlling the height of the second piston 43 inside the liquid storage chamber 40.

[0039] like Figure 2 , Figure 4 and Figure 6 As shown, to achieve height adjustment of the adjusting roller 34, lead screws 21 are rotatably mounted on both sides of the outer frame 1. A travel slide 22 is threaded onto the lead screw 21. One end of the travel slide 22 is vertically slidably connected to the outer frame 1, and both ends of the adjusting roller 34 are rotatably connected to the travel slide 22. A motor 27 for driving the adjusting roller 34 is fixed to the outside of one of the travel slides 22. It should be noted that in this design, the output speed of the motor 27 matches the output speed of the dual-axis motor 11 and rotates in the opposite direction to ensure stable delivery of the warp yarn 10. Furthermore, a transmission box 6 is fixed to the upper end of the outer frame 1. The transmission box 6 contains a drive assembly for synchronously driving the lead screw 21. The rotational drive assembly includes a drive shaft 23 rotatably mounted inside the transmission box 6. One end of the drive shaft 23 passes through the transmission box 6 and is equipped with a handwheel. A first bevel gear 24 is provided on the drive shaft 23. The upper end of the lead screw 21 extends into the transmission box 6 and is equipped with a second bevel gear 25 that meshes with the first bevel gear 24. The drive shaft 23 is driven to rotate by the handwheel, causing the first bevel gear 24 to drive the second bevel gear 25 to rotate. This further causes the two lead screws 21 to rotate synchronously. Through the threaded connection between the lead screw 21 and the travel slide 22, the travel slide 22 slides vertically on the outer frame 1, thereby adjusting the height of the adjusting roller 34 to adjust the distance between the guide wheel 36 and the adjusting roller 34.

[0040] In use (working), the drive shaft 23 is rotated by the handwheel, which causes the first bevel gear 24 to drive the second bevel gear 25 to rotate, and further causes the two lead screws 21 to rotate synchronously. Through the threaded connection between the lead screw 21 and the travel slide 22, the travel slide 22 slides vertically on the outer frame 1, thereby adjusting the height of the adjusting roller 34 to adjust the distance between the guide wheel 36 and the adjusting roller 34.

[0041] The warp yarn 10 is wound onto the warp feed assembly, and the other end of the warp yarn 10 is passed sequentially through the adjusting roller 34, guide wheel 36, tension detection roller 20, guide roller 7, and arc-shaped reed 19. The dual-axis motor 11 and motor 27 are started, and the dual-axis motor 11 drives the drive shaft 12 to drive the second pulley 14 to rotate. The first pulley 13 and the third pulley 15 rotate synchronously through the first transmission belt 16, which further rotates the warp feed shaft 2 to realize the conveying of the warp yarn 10. When the tension of the warp yarn 10 decreases, the warp yarn 10 has no tension on the guide wheel 36 and bearing seat 37. Under the gravity of the guide wheel 36 and bearing seat 37, the lifting rod 38 moves downward, thereby causing the first piston 42 to squeeze the liquid inside the U-shaped cavity 39 and make the liquid flow into the liquid storage cavity 40 through the connecting pipe 41, thereby causing the second piston 42 to move downward. The second piston 43 drives the permanent magnet 44 to slide towards the electromagnet 45, causing the repulsive force to gradually increase until the second piston 43 stabilizes. When the tension of the warp 10 increases, the guide wheel 36 and the bearing seat 37 are pulled upward by the warp 10, and under the action of hydraulic pressure, the liquid column inside the reservoir 40 drops, further causing the second piston 43 to drive the permanent magnet 44 to slide away from the electromagnet 45, causing the repulsive force to gradually decrease until the second piston 43 stabilizes. In addition, the transmission shaft 49 is rotated by the third pulley 15, thereby causing the guide block 48 to drive the guide wheel 36 to rotate. Since the height of the guide wheel 36 is uncertain, the guide block 48 slides inside the groove 47 to achieve synchronous drive of the two adjacent sets of guide wheels 36, thereby reducing the friction between the warp 10 and the guide wheel 36.

[0042] Meanwhile, the drive shaft 12 drives the fourth pulley 26 to rotate, which in turn drives the fifth pulley 29 to rotate synchronously via the second transmission belt 17. This further rotates the pin 28, which in turn drives the movable rod 33 to rotate. The rotation of the movable rod 33 causes the slider 32 to slide inside the through groove 31, further pushing the movable plate 30 to swing. This causes the sliding sleeve 9 to reciprocate on the arc frame 8, which in turn causes the sliding sleeve 9 to drive the corresponding fixed rod 18 to move. This causes the arc reed 19 to move, so that the warp yarns 10 on the other end of the arc reed 19 alternately form sheds. Since the arc reed 19 rotates with the center of the circle corresponding to its arc as the axis, the length of the warp yarns 10 pulled by the arc reed 19 does not change when forming sheds. This avoids tension changes in the warp yarns 10 when forming sheds, fundamentally eliminating path length changes, significantly reducing fatigue damage to the warp yarns 10, and ensuring long-term operational reliability.

[0043] The present invention also provides a warp feeding method for a rapier loom, comprising the following steps: S1. Adjust the height of adjusting roller 34; S2. Wrap the warp yarn 10 around two adjacent warp feed assemblies, and adjust the tension of each warp yarn 10 individually through the tension adjustment assembly at the other end of the warp yarn 10. S3, and apply power to the warp yarn 10 to transport it.

[0044] 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.

[0045] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A warp feeding device for a rapier loom, comprising an outer frame (1), characterized in that, Also includes: The delivery component is located at the tail of the outer frame (1); The tension adjustment component is located inside the outer frame (1) and is used for tension adjustment after the warp yarn (10) is output; The tension adjustment assembly includes: The housing (35) is fixed to the lower end of the outer frame (1), and bearing seats (37) are installed at equal intervals on its upper end. A connecting shaft (46) is rotatably installed inside the bearing seat (37), and a guide wheel (36) is fixed on one side of the connecting shaft (46). The U-shaped cavity (39) is located inside the box (35) and corresponds to the bearing seat (37). A lifting rod (38) is symmetrically fixed on the bearing seat (37). The lower end of the lifting rod (38) extends into the U-shaped cavity (39) and is fitted with a first piston (42). The liquid storage chamber (40) is located inside the box body (35) and in the middle of the U-shaped cavity (39). The lower end of the chamber is provided with a connecting pipe (41) that communicates with the U-shaped cavity (39). An electromagnet (45) is fixed at the upper end of the liquid storage chamber (40), and a second piston (43) is slidably installed inside the liquid storage chamber (40). A permanent magnet (44) that repels the electromagnet (45) is fixed at the upper end of the second piston (43). Adjustment roller (34) is located above box body (35).

2. The warp feeding device for a rapier loom according to claim 1, characterized in that, Also includes: Guide rollers (7) are symmetrically arranged at one end of the outer frame (1), and the gap between the two guide rollers (7) is used for guiding the output of warp yarns (10); Arc-shaped frames (8) are symmetrically installed on both sides of the outer frame (1), and sliding sleeves (9) are slidably installed on them. The two sets of sliding sleeves (9) are centrally symmetrical about the midpoint of the line connecting the two arc-shaped frames (8). A fixing rod (18) is fixed on one side of the sliding sleeve (9), and arc-shaped steel reeds (19) are installed on the fixing rod (18) at equal intervals. Among them, the arc-shaped reeds (19) on the two sets of fixed rods (18) are staggered, and the gap between the two sets of guide rollers (7) coincides with the central axis of the arc corresponding to the arc of the arc frame (8) and the arc-shaped reeds (19).

3. The warp feeding device for a rapier loom according to claim 2, characterized in that, The sliding sleeve (9) has a movable plate (30) fixed at the middle end. The other end of the movable plate (30) is hinged to the outer frame (1), and the hinge point coincides with the central axis of the arc corresponding to the arc of the arc frame (8) and the arc reed (19). A through groove (31) is provided in the middle of the movable plate (30). A slider (32) is slidably installed in the through groove (31). A movable rod (33) is rotatably installed on one side of the slider (32).

4. The warp feeding device for a rapier loom according to claim 3, characterized in that, A dual-axis motor (11) is fixed at the bottom inside the outer frame (1). The output end of the dual-axis motor (11) is provided with a drive shaft (12). A fourth pulley (26) is installed on the drive shaft (12). A pin (28) is rotatably mounted on the outer frame (1). One end of the pin (28) is fixedly connected to the movable rod (33), and the other end of the pin (28) is fixed with a fifth pulley (29). A second transmission belt (17) is provided between the fifth pulley (29) and the fourth pulley (26).

5. The warp feeding device for a rapier loom according to claim 4, characterized in that, The warp feeding assembly includes a warp feeding shaft (2) rotatably installed in the outer frame (1). Isolation discs (4) are provided at equal intervals on the warp feeding shaft (2), and a fixing slot (3) is opened on the surface of the warp feeding shaft (2). A fixing strip (5) is fixed in the fixing slot (3) by bolts.

6. The warp feeding device for a rapier loom according to claim 5, characterized in that, One end of the feed shaft (2) passes through the outer frame (1) and is fitted with a first pulley (13). One end of the drive shaft (12) passes through the outer frame (1) and is fitted with a second pulley (14). A transmission shaft (49) is rotatably mounted on the outer frame (1). One end of the transmission shaft (49) is provided with a third pulley (15). A first transmission belt (16) is provided between the first pulley (13), the second pulley (14), and the third pulley (15).

7. The warp feeding device for a rapier loom according to claim 6, characterized in that, The guide wheel (36) has a groove (47) on one side, and the connecting shaft (46) and the transmission shaft (49) are provided with guide blocks (48) that are slidably connected to the adjacent groove (47).

8. A warp feeding device for a rapier loom according to any one of claims 1-7, characterized in that, A tension detection roller (20) is installed on the inner side of the outer frame (1), and the tension detection roller (20) is located between the adjusting roller (34) and the guide roller (7).

9. The warp feeding device for a rapier loom according to claim 8, characterized in that, The outer frame (1) is rotatably mounted with lead screws (21) on both sides. The lead screws (21) are connected to stroke slides (22) by threads. One end of the stroke slides (22) is vertically slidably connected to the outer frame (1). The two ends of the adjusting roller (34) are rotatably connected to the stroke slides (22). A motor (27) for driving the adjusting roller (34) to rotate is fixed on the outside of one of the stroke slides (22). The upper end of the outer frame (1) is fixed with a transmission box (6), and the transmission box (6) is provided with a drive assembly, which is used to drive the lead screw (21) to rotate synchronously.

10. A warp feeding method for a rapier loom, applicable to the warp feeding device of the rapier loom according to any one of claims 1-9, characterized in that, Includes the following steps: S1. Adjust the height of the adjusting roller (34); S2. Wrap the warp yarn (10) around two adjacent warp feed assemblies, and adjust the tension of each warp yarn (10) individually through the tension adjustment assembly at the other end of the warp yarn (10); S3, and apply power to the warp yarn (10) to transport it.

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