A multi-thread synchronous weft yarn untwisting device

Abstract

The application discloses a multi-thread synchronous weft yarn untwisting device, which comprises a winding device, the winding device comprising a first gear, a first mounting plate, a second gear, a motor, a first mounting rod, a first mounting shaft, a take-up drum, a mounting block, a sliding rod, a reciprocating wire rod and a threaded sliding block, which is used for collecting the weft yarn after untwisting and keeping the tensile force of the weft yarn; a paying-off device comprising a second mounting plate, a sixth gear, a second mounting rod, a second mounting shaft, a paying-off drum, a fixed plate, a support arm and a second sliding bearing, which is used for placing the weft yarn to be untwisted; a friction device composed of a friction ring, which can untwist the weft yarn through friction; and a moving device comprising a motorized twisting reel, a fixed pulley and a movable pulley, which is used for adjusting the efficiency during untwisting.

Description

Technical Field

[0001] This invention relates to the field of textile fabrics, and more particularly to a multi-thread synchronous weft yarn untwisting device. Background Technology

[0002] In fabric weaving, weft yarn is required. However, since weft yarn is made by winding multiple yarns together, it contains torsional stress. This torsional stress causes the weft yarn to automatically gather and form knots during weaving, thus affecting the final fabric weaving effect. The existing method is to install a sleeve device with a detwisting ring at the front end of the weft yarn winding spool and pass the weft yarn through the detwisting ring and the sleeve. The weft yarn is detwisted by the pressure friction between the detwisting ring and the sleeve. However, when encountering large knots, the knots are easily stuck, or even the detwisting ring may fall off, resulting in poor detwisting effect.

[0003] For example, CN201920735808.2 proposes a yarn untwisting device, which includes a cylinder with an untwisting ring on its side wall. The untwisting ring is an elastic ring. A fixing component is provided at one end of the cylinder. A connecting part is provided on the side wall of the cylinder. The diameter of the connecting part gradually increases away from the fixing component. Multiple annular grooves are spaced apart on the connecting part. The annular grooves are coaxially arranged with the cylinder. The untwisting ring is located in the annular groove. The diameter of the untwisting ring is smaller than the diameter of the annular groove. When it is necessary to increase the pressure of the untwisting ring on the yarn, the untwisting ring is moved to the annular groove with a larger diameter. The deformation of the untwisting ring increases, the pressure on the cylinder increases, and the downward tension on the yarn is greater, thus achieving a better untwisting effect. However, this does not solve the above-mentioned problem.

[0004] The present invention can stretch the weft yarn through the winding device and make the weft yarn form an angle with the unwinding device, so as to detwist by friction with the friction device. Summary of the Invention

[0005] To address the aforementioned problems, the present invention aims to provide a multi-thread synchronous weft yarn detwisting device. This device can stretch the weft yarn through a winding device and, in conjunction with a release device, make the weft yarn form an angle, thereby detwisting it through friction with a friction device.

[0006] This invention provides a multi-thread synchronous weft yarn detwisting device, which includes a slide rail, a base plate at one end of the slide rail, a first sliding plate at the other end of the slide rail, and a second sliding plate in the middle of the slide rail. The device further includes: a winding device located above the base plate for collecting the detwisted weft yarn and maintaining its tension; a feeding device located above the first sliding plate for placing the weft yarn to be detwisted; a friction device located above the second sliding plate for detwisting the weft yarn through friction; and a moving device located below the first sliding plate for adjusting the detwisting efficiency.

[0007] Furthermore, the winding device includes a first gear, a first mounting plate, a second gear, a motor, a first mounting rod, a first mounting shaft, a take-up drum, a mounting block, a sliding rod, a reciprocating screw, and a threaded slider. The first gear is mounted on the base plate via bearings. The first mounting plate is rotatably positioned in front of the first gear. The second gear is fixed above the first gear. The motor is positioned above the base plate. A third gear on the motor output shaft meshes with the first mounting plate. The first mounting rods are evenly distributed in a ring in front of the first mounting plate. The first mounting shaft is rotatably positioned on the first mounting rod. A fourth gear is positioned behind the first mounting shaft and meshes with the second gear. The take-up drum is positioned on the first mounting shaft. The mounting block is positioned on the first mounting plate and located on one side of the take-up drum. The sliding rod is positioned on the mounting block. The reciprocating screw is rotatably mounted on the first mounting plate and the mounting block. A fifth gear is positioned at the end of the reciprocating screw and meshes with the first gear. The threaded slider is slidably mounted on the sliding rod and the reciprocating screw.

[0008] Furthermore, a guide wheel and a first sliding bearing are rotatably mounted on the threaded slider, with the first sliding bearing located in front of and above the guide wheel.

[0009] Furthermore, the take-up drum is conical, with baffles at both the front and rear, and a notch at the front end. The front and rear ends of the first mounting shaft fit into the inner wall of the take-up drum, and the front end of the first mounting shaft has a snap-fit ​​structure that can lock the notch at the front end of the take-up drum.

[0010] Furthermore, the wire feeding device includes a second mounting plate, a sixth gear, a second mounting rod, a second mounting shaft, a wire feeding drum, a fixed plate, a support arm, and a second sliding bearing. The second mounting plate is rotatably mounted above the first slide plate via a bearing bracket. The sixth gear is slidably mounted on the motor output shaft and meshes with the second mounting plate. The second mounting rod is located in front of the second mounting plate. The second mounting shaft is rotatably mounted on the second mounting rod. The wire feeding drum is mounted on the second mounting shaft. The fixed plate is fixed in front of the second mounting plate. The support arm is evenly hinged to the edge of the fixed plate in a ring.

[0011] Furthermore, a torsion spring is provided between the support arm and the fixed plate, the support arm is located on the side of the wire feeding drum, and a second sliding bearing is provided at the end of the support arm.

[0012] Furthermore, the friction device consists of a friction ring disposed above the second sliding plate. The friction ring is located between the first mounting plate and the second mounting plate, and is coaxial with the first mounting plate and the second mounting plate. The friction ring is circular, and the weft yarn passes through the friction ring.

[0013] Furthermore, the friction ring is provided with an inclined groove, the groove facing in the opposite direction to the rotation direction of the first mounting plate and the second mounting plate.

[0014] Furthermore, the moving device includes an electric winch, a fixed pulley, and a movable pulley. The electric winch is located below the base plate, the fixed pulley is located on both sides of the front end below the base plate, and the movable pulley is located below the second slide plate. A pull line is wound around the electric winch.

[0015] Furthermore, one end of the pull wire is fixed to an electric winch, the middle part of the pull wire is wound around a fixed pulley on one side, a movable pulley and a fixed pulley on the other side in sequence, and the other end of the pull wire is fixedly connected to the first slide plate.

[0016] Beneficial effects: 1. A fifth gear is provided at the end of the reciprocating screw, which meshes with the first gear. The threaded slider is slidably installed on the slide rod and the reciprocating screw. A guide wheel and a first sliding bearing are rotatably installed on the threaded slider. The first sliding bearing is located above and in front of the guide wheel. The take-up drum is conical, with baffles at both the front and rear. The front end of the take-up drum has a notch. The front and rear ends of the first mounting shaft fit into the inner wall of the take-up drum. The front end of the first mounting shaft has a snap-fit ​​structure that can lock the notch at the front end of the take-up drum. The take-up drum can be disassembled and assembled through the snap-fit ​​structure at the front end of the first mounting shaft. Then, the threaded slider is driven to move back and forth by the reciprocating screw. The guide wheel and the first sliding bearing guide the untwisted weft yarn to be evenly wound on the take-up drum, and multi-thread simultaneous untwisting is achieved.

[0017] 2. The fixing plate is fixed in front of the second mounting plate. The support arm is evenly hinged to the edge of the fixing plate in a ring. A torsion spring is provided between the support arm and the fixing plate. The support arm is located on the side of the pay-off drum. A second sliding bearing is provided at the end of the support arm. The weft yarn can be guided by the second sliding bearing, and the tension of the weft yarn can be maintained by the support arm with the torsion spring.

[0018] 3. The friction ring is circular, and the weft yarn passes through the friction ring. The friction ring has an inclined groove, and the groove faces the opposite direction of rotation of the first mounting plate and the second mounting plate. The inclined groove can increase the friction force, which is different from the traditional grooveless type. It has a better detwisting effect. It is also different from vertical or horizontal grooves. Compared with the groove, the inclined groove is less likely to cause the weft yarn to get stuck in the groove.

[0019] 4. An electric twisting wheel is located below the base plate, fixed pulleys are located on both sides of the front end below the base plate, and a movable pulley is located below the second slide plate. A pull line is wound around the electric twisting wheel. One end of the pull line is fixed to the electric twisting wheel, and the middle part of the pull line is wound around the fixed pulley on one side, the movable pulley, and the fixed pulley on the other side in sequence. The other end of the pull line is fixedly connected to the first slide plate. The second slide plate and the first slide plate can be moved by pulling the pull line with the electric twisting wheel, and the second slide plate can be aligned, thereby adjusting the angle between the weft yarns between the first sliding bearing and the second sliding bearing, thereby changing the detwisting efficiency and improving the practicality of this detwisting device.

[0020] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Attached Figure Description

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

[0022] Figure 2 This is a schematic diagram of the overall structure of the present invention. Figure 2 .

[0023] Figure 3 This is a schematic diagram of the overall structure of the present invention. Figure 3 .

[0024] Figure 4 This is an exploded view of the present invention.

[0025] Figure 5 The explosion of the winding device of the present invention Figure 1 .

[0026] Figure 6 The explosion of the winding device of the present invention Figure 2 .

[0027] Figure 7 The explosion of the winding device of the present invention Figure 3 .

[0028] Figure 8 The explosion of the winding device of the present invention Figure 4 .

[0029] Figure 9 The explosion of the wire feeding device of the present invention Figure 1 .

[0030] Figure 10 The explosion of the wire feeding device of the present invention Figure 2 .

[0031] Figure 11 This is a cross-sectional view of the friction device of the present invention.

[0032] Reference numerals: Base plate 1; First gear 2; First mounting plate 3; Second gear 4; Motor 5; Third gear 6; First mounting rod 7; First mounting shaft 8; Fourth gear 9; Take-up drum 10; Mounting block 11; Slide rod 12; Reciprocating screw 13; Fifth gear 14; Threaded slider 15; Guide wheel 16; First sliding bearing 17; First sliding plate 18; Second mounting plate 19; Sixth gear 20; Second mounting rod 21; Second mounting shaft 22; Pay-off drum 23; Fixing plate 24; Support arm 25; Second sliding bearing 26; Second sliding plate 27; Friction ring 28; Electric stranding wheel 29; Fixed pulley 30; Moving pulley 31; Pull wire 32; Slide rail 33. Detailed Implementation

[0033] 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. In order to simplify the disclosure of the present invention, the components and settings of specific examples are described below. Of course, they are just examples and are not intended to limit the present invention.

[0034] The multi-thread synchronous weft yarn detwisting device according to an embodiment of the present invention will now be described with reference to the accompanying drawings. Figure 1 - Figure 11 As shown, the multi-thread synchronous weft yarn detwisting device includes a slide rail 33, a base plate 1 at one end of the slide rail 33, a first slide plate 18 slidably at the other end of the slide rail 33, and a second slide plate slidably in the middle of the slide rail 33. The multi-thread synchronous weft yarn detwisting device also includes: a winding device located above the base plate 1 for collecting the detwisted weft yarn and maintaining the tension of the weft yarn; a feeding device located above the first slide plate 18 for placing the weft yarn to be detwisted; a friction device located above the second slide plate for detwisting the weft yarn through friction; and a moving device located below the first slide plate 18 for adjusting the efficiency during detwisting.

[0035] like Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown, the multi-thread synchronous weft yarn untwisting device includes a winding device, which includes a first gear 2, a first mounting plate 3, a second gear 4, a motor 5, a first mounting rod 7, a first mounting shaft 8, a take-up spool 10, a mounting block 11, a slide rod 12, a reciprocating screw 13, and a threaded slider 15. The first gear 2 is mounted on the base plate 1 via bearings. The first mounting plate 3 is rotatably positioned in front of the first gear 2. The second gear 4 is fixed above the first gear 2. The motor 5 is positioned above the base plate 1. A third gear 6 is mounted on the output shaft of the motor 5 and meshes with the first mounting plate 3. The first mounting rods 7 are evenly distributed in a ring in front of the first mounting plate 3. The first mounting shaft 8 is rotatably positioned on the first mounting rods 7. A fourth gear 9 is located behind the first mounting shaft 8 and meshes with the second gear 4. The take-up spool 10 is positioned on the first mounting plate 1. On shaft 8, mounting block 11 is mounted on first mounting plate 3. Mounting block 11 is located on one side of take-up drum 10. Slide rod 12 is mounted on mounting block 11. Reciprocating screw 13 is rotatably mounted on first mounting plate 3 and mounting block 11. Fifth gear 14 is provided at the end of reciprocating screw 13. Fifth gear 14 meshes with first gear 2. Threaded slider 15 is slidably mounted on slide rod 12 and reciprocating screw 13. Threaded slider 15 is rotatably mounted with guide wheel 16 and first sliding bearing 17. First sliding bearing 17 is located in front of and above guide wheel 16. Take-up drum 10 is conical. Baffles are provided at both the front and rear of take-up drum 10. A notch is provided at the front end of take-up drum 10. The front and rear ends of first mounting shaft 8 fit into the inner wall of take-up drum 10. A buckle structure is provided at the front end of first mounting shaft 8 to lock the notch at the front end of take-up drum 10.

[0036] In a specific embodiment: the weft yarn passes through the first sliding bearing 17 and is guided to the take-up drum 10 by the guide wheel 16. The motor 5 rotates through an external power source, and drives the first mounting plate 3 to rotate through the third gear 6, thereby causing the fourth gear 9 to rotate around the second gear 4, and the fifth gear 14 to rotate around the first gear 2, thereby causing the first mounting shaft 8 to drive the take-up drum 10 to rotate for winding and tightening the weft yarn.

[0037] At the same time, the rotation of the fifth gear 14 causes the reciprocating screw 13 to rotate, thereby causing the threaded slider 15 to move back and forth on the slide bar 12, so that the weft yarn is evenly wound on the take-up spool 10.

[0038] like Figure 4 , Figure 9 and Figure 10 As shown, the multi-thread synchronous weft yarn detwisting device includes a yarn feeding device, which includes a second mounting plate 19, a sixth gear 20, a second mounting rod 21, a second mounting shaft 22, a yarn feeding drum 23, a fixed plate 24, a support arm 25, and a second sliding bearing 26. The second mounting plate 19 is rotatably mounted above the first sliding plate 18 via a bearing bracket. The sixth gear 20 is slidably mounted on the output shaft of the motor 5 and meshes with the second mounting plate 19. The second mounting rod 21 is located in front of the second mounting plate 19. The second mounting shaft 22 is rotatably mounted on the second mounting rod 21. The yarn feeding drum 23 is mounted on the second mounting shaft 22. The fixed plate 24 is fixed in front of the second mounting plate 19. The support arm 25 is evenly hinged to the edge of the fixed plate 24 in a ring shape. A torsion spring is provided between the support arm 25 and the fixed plate 24 to guide the weft yarn and maintain the tension of the weft yarn through the torsion spring. The support arm 25 is located on the side of the yarn feeding drum 23, and the second sliding bearing 26 is provided at the end of the support arm 25.

[0039] In a specific embodiment: the weft yarn passes through the second sliding bearing 26, the motor 5 drives the sixth gear 20 to rotate through the external power supply, causing the second mounting plate 19 to rotate, the weft yarn is pulled by the winding device, and the pay-off drum 23 is pulled to rotate by the guide of the second sliding bearing 26.

[0040] like Figure 2 and Figure 11 As shown, the multi-thread synchronous weft yarn detwisting device includes a friction device, which consists of a friction ring 28 located above the second slide plate. The friction ring 28 is located between the first mounting plate 3 and the second mounting plate 19. The friction ring 28 is coaxial with the first mounting plate 3 and the second mounting plate 19. The friction ring 28 is circular, and the weft yarn passes through the friction ring 28. The friction ring 28 is provided with an inclined groove, and the groove faces the opposite direction to the rotation direction of the first mounting plate 3 and the second mounting plate 19.

[0041] In a specific embodiment: when the first mounting plate 3 and the second mounting plate 19 rotate, they drive the weft yarn passing through the first sliding bearing 17 and the second sliding bearing 26 to rotate, causing the weft yarn to rub and roll against the inner side of the friction ring 28, thereby removing the torsional stress on the weft yarn and achieving the effect of detwisting.

[0042] like Figure 3 As shown, the multi-thread synchronous weft yarn detwisting device includes a moving device, which includes an electric twisting wheel 29, a fixed pulley 30, and a movable pulley 31. The electric twisting wheel 29 is located below the base plate 1, the fixed pulley 30 is located on both sides of the front end of the base plate 1, and the movable pulley 31 is located below the second slide plate. A pull wire 32 is wound around the electric twisting wheel 29. One end of the pull wire 32 is fixed to the electric twisting wheel 29, and the middle part of the pull wire 32 is wound around the fixed pulley 30 on one side, the movable pulley 31, and the fixed pulley 30 on the other side in sequence. The other end of the pull wire 32 is fixedly connected to the first slide plate 18.

[0043] In a specific embodiment: the weft yarn passes through the friction ring 28, the first sliding bearing 17 and the second sliding bearing 26, thereby forming an angle. Due to the tension of the winding device on the weft yarn, the angle of the weft yarn is made to fit against the middle of the friction ring 28.

[0044] During adjustment, the electric twisting wheel 29 is wound up by an external power source, which in turn drives the first sliding plate 18 to move and drives the second sliding plate to move by 1 / 2 the distance that the first sliding plate 18 moves. This keeps the second sliding plate in the center, thereby reducing the distance between the first sliding bearing 17 and the second sliding bearing 26, reducing the angle formed by the weft yarn, increasing the contact area between the angle and the friction ring 28, and lengthening the weft yarn in one detwisting operation, thereby improving the detwisting efficiency.

[0045] When the distance between the first sliding bearing 17 and the second sliding bearing 26 is at its maximum, the included angle is at its maximum, resulting in the highest detwisting efficiency. However, the pressure of the friction ring 28 on the weft yarn is also at its maximum, leading to the maximum reverse force of the friction ring 28 on the weft yarn. Therefore, the detwisting effect is the best, but the detwisting efficiency is the lowest, making it suitable for weft yarns with high twist. When the distance between the first sliding bearing 17 and the second sliding bearing 26 is at its minimum, the included angle is at its minimum, resulting in the lowest detwisting efficiency. However, the pressure of the friction ring 28 on the weft yarn is also at its minimum, leading to the minimum reverse force of the friction ring 28 on the weft yarn. Therefore, the detwisting effect is the worst, but the detwisting efficiency is the highest, making it suitable for weft yarns with low twist.

[0046] Working principle: The weft yarn passes through the first sliding bearing 17 and is guided by the guide wheel 16 to the take-up drum 10. The motor 5 rotates through an external power source, which drives the first mounting plate 3 to rotate through the third gear 6. This causes the fourth gear 9 to rotate around the second gear 4, and the fifth gear 14 to rotate around the first gear 2. This causes the first mounting shaft 8 to drive the take-up drum 10 to rotate for winding and tightening the weft yarn. At the same time, the rotation of the fifth gear 14 causes the reciprocating screw 13 to rotate, which causes the threaded slider 15 to move back and forth on the slide rod 12. This ensures that the weft yarn is evenly wound on the take-up drum 10. Meanwhile, the weft yarn passes through the second sliding bearing 26. The motor 5 drives the sixth gear 20 to rotate through an external power source, which causes the second mounting plate 19 to rotate. This pulls the weft yarn through the winding device and, guided by the second sliding bearing 26, pulls the pay-off drum 23 to rotate. When the first mounting plate 3 and the second mounting plate 19 rotate, they drive the weft yarn passing through the first sliding bearing 17 and the second sliding bearing 26 to rotate. This causes the weft yarn to rub and roll against the inner side of the friction ring 28, thereby removing the torsional stress on the weft yarn and achieving the effect of detwisting.

Claims

1. A multi-thread synchronous weft yarn untwisting device, comprising a slide rail (33), a base plate (1) at one end of the slide rail (33), a first sliding plate (18) slidably provided at the other end of the slide rail (33), and a second sliding plate (27) slidably provided in the middle of the slide rail (33), characterized in that, The multi-line synchronous weft yarn detwisting device also includes: a winding device located above the base plate (1) for collecting the detwisted weft yarn and maintaining the tension of the weft yarn; a feeding device located above the first slide plate (18) for placing the weft yarn to be detwisted; a friction device located above the second slide plate (27) for detwisting the weft yarn through friction; and a moving device located below the first slide plate (18) for adjusting the efficiency during detwisting. The winding device includes a first gear (2), a first mounting plate (3), a second gear (4), a motor (5), a first mounting rod (7), a first mounting shaft (8), a take-up drum (10), a mounting block (11), a slide rod (12), a reciprocating screw (13), and a threaded slider (15). The first gear (2) is mounted on the base plate (1) via bearings. The first mounting plate (3) is rotatably positioned in front of the first gear (2). The second gear (4) is fixed above the first gear (2). The motor (5) is positioned above the base plate (1). A third gear (6) is mounted on the output shaft of the motor (5) and meshes with the first mounting plate (3). The first mounting rods (7) are evenly distributed in a ring in front of the first mounting plate (3). The first mounting shaft (8) is rotatably mounted on the first mounting rod (7). A fourth gear (9) is provided behind the first mounting shaft (8) and meshes with the second gear (4). The take-up drum (10) is mounted on the first mounting shaft (8). The mounting block (11) is mounted on the first mounting plate (3) and is located on one side of the take-up drum (10). The slide rod (12) is mounted on the mounting block (11). The reciprocating screw (13) is rotatably mounted on the first mounting plate (3) and the mounting block (11). A fifth gear (14) is provided at the end of the reciprocating screw (13) and meshes with the first gear (2). The threaded slider (15) is slidably mounted on the slide rod (12) and the reciprocating screw (13). The threaded slider (15) is rotatably mounted with a guide wheel (16) and a first sliding bearing (17), the first sliding bearing (17) being located in front of and above the guide wheel (16); The take-up drum (10) is conical, with baffles at both the front and rear. The front end of the take-up drum (10) has a notch. The front and rear ends of the first mounting shaft (8) fit into the inner wall of the take-up drum (10). The front end of the first mounting shaft (8) has a buckle structure that can hold the notch at the front end of the take-up drum (10).

2. The multi-thread synchronous weft yarn untwisting device as described in claim 1, characterized in that, The wire feeding device includes a second mounting plate (19), a sixth gear (20), a second mounting rod (21), a second mounting shaft (22), a wire feeding drum (23), a fixed plate (24), a support arm (25), and a second sliding bearing (26). The second mounting plate (19) is rotatably mounted above the first sliding plate (18) via a bearing bracket. The sixth gear (20) is slidably mounted on the output shaft of the motor (5). The sixth gear (20) meshes with the second mounting plate (19). The second mounting rod (21) is located in front of the second mounting plate (19). The second mounting shaft (22) is rotatably mounted on the second mounting rod (21). The wire feeding drum (23) is mounted on the second mounting shaft (22). The fixed plate (24) is fixed in front of the second mounting plate (19). The support arm (25) is evenly hinged to the edge of the fixed plate (24) in a ring.

3. The multi-thread synchronous weft yarn untwisting device as described in claim 2, characterized in that, A torsion spring is provided between the support arm (25) and the fixed plate (24). The support arm (25) is located on the side of the wire feeding drum (23). A second sliding bearing (26) is provided at the end of the support arm (25).

4. The multi-thread synchronous weft yarn untwisting device as described in claim 1, characterized in that, The friction device consists of a friction ring (28) located above the second slide plate (27). The friction ring (28) is located between the first mounting plate (3) and the second mounting plate (19). The friction ring (28) is coaxial with the first mounting plate (3) and the second mounting plate (19). The friction ring (28) is circular, and the weft yarn passes through the friction ring (28).

5. The multi-thread synchronous weft yarn untwisting device as described in claim 4, characterized in that, The friction ring (28) is provided with an inclined groove, the groove facing in the opposite direction to the rotation of the first mounting plate (3) and the second mounting plate (19).

6. The multi-thread synchronous weft yarn untwisting device as described in claim 1, characterized in that, The moving device includes an electric winch (29), a fixed pulley (30) and a movable pulley (31). The electric winch (29) is located below the base plate (1), the fixed pulley (30) is located on both sides of the front end of the base plate (1), and the movable pulley (31) is located below the second slide plate (27). A pull wire (32) is wound on the electric winch (29).

7. The multi-thread synchronous weft yarn untwisting device as described in claim 6, characterized in that, One end of the pull wire (32) is fixed to the electric winch (29), and the middle part of the pull wire (32) is wound around the fixed pulley (30) on one side, the movable pulley (31) and the fixed pulley (30) on the other side in sequence. The other end of the pull wire (32) is fixedly connected to the first slide plate (18).

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