JPH08917U - Unwinding assist device for automatic winder - Google Patents

Abstract

(57) An object of the present invention is to provide an appropriate shape of a balloon regulating member in an unwinding assisting device of an automatic winder capable of increasing a practical winding speed. SOLUTION: The yarn supplying bobbin has an inner diameter regulating portion 31d which is smaller than the outer diameter of the yarn layer and larger than the outer diameter of the core tube. It is provided with a cylindrical balloon regulating member 31 for increasing the unwinding angle, and is smoothly connected to the inner diameter regulating portion 31d under the inner diameter regulating portion 31d and has a diameter of 3 mmR.
The unwinding assisting device is provided with the enlarged portion 41 having the above corners.

Description

[Detailed description of the device]

[0001]

[Technical field to which the device belongs]

 For example, regarding the unwinding assisting device in an automatic winder that splices a large number of yarn feeding bobbins produced by a ring spinning machine and removes defective parts such as slabs into one corn or cheese-like winding package, In particular, the present invention relates to an unwinding assisting device that enables an increase in winding speed.

[0002]

[Prior art]

 The automatic winder has a large number of winding units arranged in parallel, and the equipment arrangement of one winding will be described with reference to FIG.

In FIG. 11, a winding unit 1 is fixed in position by a support tube 2 and a duct 3, and a yarn Y drawn from a yarn supplying bobbin 4 that is positioned and fed to a predetermined position of the unit is a balun breaker 6 and a predetermined yarn. After passing through a disk or gate type sensor 7 for applying tension, a slab catcher 8 for detecting a defective portion of the yarn, and the like, the traverse drum 13 winds the winding package 14 that rotates. Reference numeral 15 is a yarn joining device, 16 is a suction mouse for guiding the upper yarn on the package side to the yarn joining device 15, and 17 is a relay pipe for guiding the lower yarn on the yarn supplying bobbin side to the yarn joining device 15, Each winding unit has the above-mentioned members, and a large number of such winding units 1 are arranged side by side to form one automatic winder. Further, the yarn supplying bobbins 4 are supplied to the winding position A of the winding unit 1 via the supply conveyor 11 and the rotary disc 19 while being inserted into the independent trays 18. The empty bobbin 4'after the winding is completed is discharged to the discharge conveyor 12, and a new yarn supplying bobbin 4 is supplied instead. The yarn end Y1 is inserted in the hollow portion of the head of the yarn supplying bobbin 4 so that the yarn Y of the yarn supplying bobbin 4 at the winding position A is blown up and sucked by the relay pipe 17.

In the winding unit 1 described above, when the slab catcher 8 detects a defective portion of the yarn, the attached cutter is operated to perform the yarn cutting, and the yarn running signal of the slab catcher 8 is used as a starting point for the yarn splicing. Done. This yarn splicing operation will be described with reference to FIG. In FIG. 12, the suction mouth 16 swivels in the direction, its suction port 16a is located between the traverse drum 13 and the winding package 14, and sucks the yarn end of the winding package 14. When the suction mouth 16 reaches a predetermined position, the traverse drum 13 or the winding package 14 reversely releases the yarn by the reverse rotation of the reverse rotation roller or the drive motor in the machine frame 5, and the yarn end is sucked into the suction mouth 16. To do so. Further, substantially at the same time as the operation of the suction mouth 16, the relay pipe 17 turns in the direction and is positioned below the tensor 7. At this time, the tensor 7 is opened, and the yarn end released from the tensor 7 is sucked into the relay pipe 17. In the bobbin change, the yarn blown from the yarn supplying bobbin is sucked into the relay pipe 17. Next, when the suction mouth 16 and the relay pipe 17, which have sucked the yarn end on the winding package side and the yarn end on the yarn supplying bobbin side, turn in opposite directions and return to the position shown in the drawing, the yarn is spun on the yarn joining device 15. Entering and splicing are performed.

By the way, even when the yarn supplying bobbin becomes empty or when the yarn is broken, the above-described yarn joining operation is performed starting from the yarn traveling signal OFF of the slab catcher 8. However, when the yarn supplying bobbin becomes empty, the yarn joining operation fails because there is no lower yarn. There, a yarn feeler 9 for confirming the presence or absence of the lower thread is provided below the tenser 7, and if the yarn feeler 9 does not detect the lower thread, bobbin change is performed in parallel with the yarn splicing operation. . This bobbin change is performed in cooperation with the rotation of the rotary disc 19 (see FIG. 11) and the turning operation of an eject lever (not shown), the empty bobbin 4'is discharged, and a new yarn feeding bobbin 4 is supplied. Such a yarn feeler 9 for detecting the lower yarn may be a mechanical one or one using an optical sensor.

[0006] In the winding unit 1 described above, while removing defective parts such as slabs from the yarn unwound from the yarn supplying bobbin, and performing yarn splicing for each yarn supplying bobbin, one of the cone and chees Since the winding package is formed, its productivity depends largely on the winding speed. However, in the conventional automatic winder, the practical winding speed was around 1000 m / min. The reason is that the winding speed is limited by the combination of the following phenomena (a) to (c). (A) The unwinding tension increases as the winding speed increases. In particular, the unwinding tension sharply increases from the time when the remaining unwinding amount called the third ball becomes 1/3, but if the degree of this increase increases, the yarn breaks due to the tension. (B) Sluffing increases as the winding speed increases. This sluffing is a state in which a plurality of coils are entangled with each other like a loophole without being unwound stably from the chess portion 4a of the yarn supplying bobbin 4, resulting in yarn breakage. It will be a cause. (C) The fluff increases as the winding speed increases.

It has been empirically known that these phenomena (a) to (c) depend on the state of unwinding from the yarn supplying bobbin. Therefore, as shown in FIG. 11, the balloon of the yarn unwound from the yarn supplying bobbin 4 is restricted by the balloon breaker 6 which is a quadrangular pyramid cylinder, and the balloon is kept appropriate so as not to spread too much. However, since the balloon breaker 6 is located below the guide plate 10 and above the yarn supplying bobbin 4 and is fixed to the machine base 5, the unwinding of the yarn supplying bobbin 4 proceeds and the yarn supplying bobbin 4 is released. The distance from the chess portion 4a of 4 to the lower end of the balloon breaker 6 gradually increased, and the function of the balloon breaker 6 tended to deteriorate. Therefore, it is also proposed to make the balloon breaker 6 cylindrical so as to follow the unwinding of the yarn feeding bobbin and gradually lower it.

[0008]

[Problems to be solved by the device]

 However, the shape of the conventional balloon breaker is not appropriate, and it is not possible to comprehensively deal with the phenomena (a) to (c). As a result, there was a problem that the practical winding speed of about 1000 m / min could not be increased.

The present invention has been made in view of the above problems of the prior art, and an object thereof is to provide an unwinding assist device for an automatic winder capable of increasing a practical winding speed. It is intended to provide an appropriate shape for the balloon regulating member in.

[0010]

[Means for Solving the Problems]

 In order to achieve the above object, the unwinding assisting device in the present invention has an inner diameter regulating portion that is smaller than the outer diameter of the yarn layer of the yarn supplying bobbin and larger than the outer diameter of the core tube, and follows the unwinding of the yarn supplying bobbin. While being provided with a cylindrical balloon regulating member which covers the yarn supplying bobbin and widens the balloon of the yarn at the inner diameter regulating portion to increase the unwinding angle, the inner diameter regulating portion is provided below the inner diameter regulating portion. It is smoothly connected with an enlarged portion having a corner of 3 mmR or more.

[0011] From the beginning of unwinding to the unwinding of a predetermined amount (after the third ball), when the inner diameter regulating portion that is smaller than the outer diameter of the yarn layer of the yarn supplying bobbin and larger than the outer diameter of the core tube is followed to unwind, The unwinding angle from is properly maintained and sluffing and fluffing are reduced. In addition, the balloon is regulated to an appropriate bulge and stabilized by the enlarged part with a corner of 3 mmR or more that is attached below the inner diameter regulation part so as to be smoothly continuous, and the occurrence of fluff and fluctuation of unwinding force are suppressed. To be

[0012]

[Embodiment of device]

 Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing an unwinding assisting device of the present invention.

In FIG. 1, the unwinding assisting device 30 includes a tubular body 31 as a lower balloon regulating member, a throttled tubular body 32 as an upper balloon regulating member, a sensor 33 as a tracking mechanism, a cylinder 38, and a controller. 40 is a main member.

The tubular body 31 as the lower balloon regulating member is open at the top and bottom, and has a first arm 31 a to which an elevating block 35 is attached on the side surface of the tubular body 31. The elevating block 35 is vertically slidably inserted into a rod 37 hung from a fixed block 36, and is connected to a piston rod 38a of a cylinder 38 erected on the fixed block 36. The tubular body 31 can be raised and lowered according to the expansion and contraction of 38a. The tubular body 31 is sequentially lowered so that the distance L1 from the chess portion 4a of the yarn supplying bobbin 4 is substantially constant, and covers the core tube 4b of the yarn supplying bobbin 4. Then, by appropriately maintaining the spread of the balloon (the lower balloon with respect to the tubular body 31) of the yarn unwound from the chess portion 4a, the unwinding angle is increased, and the role of suppressing the occurrence of sluffing and fluff is performed. Fulfill.

In order to sufficiently fulfill such a role of the tubular body 31, the relationship between the dimension of the inner diameter regulating portion which is the lower end of the tubular body 31 and the radial dimension of the yarn feeding bobbin 4 is important. The inner diameter D of the lower end of the tubular body 31 that controls the balloon of the yarn unwound from the chess portion 4a must be smaller than the outer diameter of the yarn layer of the yarn supplying bobbin 4 and larger than the outer diameter of the core tube 4b. Generally, the core tube 4b and the thread layer of the yarn supplying bobbin 4 have a conical shape, and the thread layer has a minimum outer diameter D1 on the upper side thereof, and the outer diameter of the core tube 4b is the lowermost position of the tubular body 31. (Shown by a chain double-dashed line) and has a diameter d1 larger than that of the top. Therefore, the inner diameter D of the cylindrical body 31 is required to be smaller than D1 and larger than d1. Preferably, the inner diameter D of the tubular body 31 should be as close as possible to d1. As will be described later, the effect due to the sequential lowering of the cylindrical body 31 is up to three-thirds, and even if it is further lowered or not lowered, there is no difference in the degree of the effect. Therefore, the cylindrical body 31 has the position of the two-dot chain line in the vicinity of the ternary ball determined by the length of the piston rod 38a of the cylinder 38 as the lower limit position, and the gap of the diameter d1 + the diameter of 2 to 3 mm = the inner diameter D of the cylindrical body 31. It is preferable that

The tubular body 32 with an aperture as the upper balloon regulating member is inserted into the outer periphery of the tubular body 31 as the lower balloon regulating member. Therefore, the cylindrical body 32 with a diaphragm descends as the cylindrical body 31 descends sequentially. However, an arm 32c with a slit 32d is attached to the apertured cylinder 32, and a magnet 32b is attached below the arm 32c. The slit 32d is guided by the stopper shaft 34, and when the magnet 32b and the arm 32c hit the plate 34a at the lower end of the stopper shaft 34, the lowering and descending of the cylindrical body 32 with a stop is stopped. That is, at the latest when the thread tension starts to increase remarkably, the cylindrical body 32 with stop stops lowering and the stop 32a is positioned directly above the core tube 4b. This squeeze 32a serves to regulate the yarn path, prevent a large fluctuation of the balloon (upper balloon) from the tubular body 31 to the guide plate 10, and narrow the fluctuation range of the yarn tension.

In order to sufficiently fulfill the role of the diaphragm 32a, the position and shape of the diaphragm 32a that regulates the yarn path are important. The diaphragm 32a needs to be located 4 to 180 mm above the top of the core tube 4b. If it is less than 4 mm, the squeeze 32a comes too close to the core tube 4b and the yarn path becomes unreasonable. If it exceeds 180 mm, it is too far away to regulate the upper balloon. The inner diameter of the diaphragm 32a is less than or equal to the outer diameter of the top portion of the core tube 4b, and needs to be 2 mm or more. This is because if the outer diameter of the top of the core tube 4b is exceeded, the yarn path is not regulated, and if it is less than 2 mm, the yarn blowing up is hindered. A diaphragm having an inner diameter of 4 to 6 mm is preferable. Further, since the cylindrical body 32 with a diaphragm is divided from the cylindrical body 31 and the cylindrical body 31 is inserted into the cylindrical body 32 with a diaphragm, the cylindrical body 31 and the cylindrical body with a diaphragm are in the standby state at the solid line position. The total height with 32 becomes low. Therefore, even if the yarn feeding bobbin 4 is a long bobbin having a high height, the distance from the top of the core tube 4b to the guide plate 10 can be shortened, and the unwinding assisting device 30 can be used to remove the entire winding unit. It prevents you from getting tall.

Next, the sensor 33, the cylinder 38, and the controller 40 as a tracking mechanism will be described. The sensor 33 attached to the second arm 31b of the tubular body 31 detects the chess portion 4a of the yarn feeding bobbin 4, and the controller 40 receiving the input of the sensor 33 actuates the switching valve 39 to cause the piston rod 38a of the cylinder 38 to operate. Gradually expands so that the distance L1 between the cylindrical body 31 and the chess portion 4a can be kept substantially constant. A diffuse reflection sensor is used as the sensor 33. As a typical example, a light source composed of an LED and a detector composed of a phototransistor or a photodiode are arranged in a crossed or parallel manner, and the light from the light source is diffused by a detected object and reflected and detected by the detector. There is something. As shown in the figure, as the unwinding of the chess part 4a progresses, the distance from the sensor 33 to the chess part 4a increases, and eventually the sensor 33 issues an OFF signal. The controller 40 receiving this OFF signal extends the piston rod 38a of the cylinder 38 via the switching valve 39. Then, the distance from the sensor 33 to the chess part 4a becomes shorter, and the sensor 33 eventually emits an ON signal. The controller 40 receiving this ON signal stops the piston rod 38 a of the cylinder 38 via the switching valve 39. By repeating this, the cylindrical body 31 descends sequentially with the unwinding. The sensor 33 for monitoring the chess portion 4a is not limited to the horizontal direction, but can be attached at any angle from right above the chess portion 4a to the horizontal.

Further, equipment related to the movement of the unwinding assisting device 30 will be described. Reference numeral 8 is a slab catcher, 9 is a yarn feeler, 20 is a lever, and 21 is a turning drive unit of the lever 20. As the slab catcher 8, for example, one that measures a change in capacitance is used, and not only a yarn defect but also whether or not the yarn is running can be detected. If the slab catcher 8 does not issue the yarn traveling signal, the yarn splicing operation is performed. In this case, the bobbin thread released from the tensor is held by the relay pipe, but when the relay pipe turns from bottom to top, the yarn unwound from the yarn feeding bobbin may be twisted. Therefore, in order to unravel the yarn, which is apt to cause warp, a lever 20 as a warp prevention device shown in FIG. 2 is provided. The lever 20 moves from the retracted position indicated by the chain double-dashed line to the operating position indicated by the solid line (a state in which the lever 20 is in contact with the side surface of the core tube 4b). Each time the yarn unwound from the chess portion 4a is rotated once, a tension is applied to the bobbin thread by the lever 20 to prevent chattering. Due to the operation of the lever 20 as the anti-rattler device, the tubular body 31 and the throttled tubular body 32 of the unwinding assisting device 30 are in the retracted position indicated by the solid line. It should be noted that the operation of the lever 20 can be performed by a mechanical operation as a part of the yarn splicing operation without using an independent turning drive section. Further, when the slab catcher 8 does not generate the yarn traveling signal and the yarn feeler 9 does not detect the yarn, the yarn supplying bobbin 4 is an empty bobbin and the bobbin is changed. Also in this case, the tubular body 31 and the throttled tubular body 32 of the unwinding assisting device 30 are in the retracted position indicated by the solid line, and when the new yarn feeding bobbin 4 is in the predetermined position, the lever 20 is operated in the retracted position indicated by the chain double-dashed line. The yarn splicing is performed while preventing the occurrence of chatter at the position.

Next, a yarn unwinding method by the above-described unwinding assisting device 30 will be described with reference to FIG. FIGS. 3A to 3D are diagrams showing how the tubular body 31 and the apertured tubular body 32 follow unwinding. In FIG. 3A, the solid line cylinder 31 and the diaphragm cylinder 32 are in the retracted position. In this retracted position, the inner diameter restricting portion at the lower end of the tubular body 31 is above the core tube 4b, and new yarn feeding bobbin is supplied following empty bobbin discharge. Then, as shown by the chain double-dashed line, the inner diameter restricting portion at the lower end of the tubular body 31 is lowered to an operating state in which it covers the core tube 4b. FIG. 3B shows the state of the quintuplet, in which both the cylindrical body 31 and the diaphragm-equipped cylindrical body 32 are lowered, and the diaphragm 32a is at a predetermined position. In particular, the tubular body 31 is sequentially lowered so as to follow the unwinding of the chess portion 4a, the unwinding angle θ of the yarn unwound from the chess portion 4a is kept large, and the unthreaded yarn remaining on the yarn feeding bobbin is unwound. As a result of less rubbing between the unwound threads, the occurrence of sluffing and fluff is suppressed. FIG. 3 (c) shows a state of a three-divided ball, in which only the tubular body 31 descends, the tubular body 32 with a diaphragm remains stopped, and the diaphragm 32a is located at a predetermined position just above the core tube 4b. . In particular, the unwinding tension tends to increase sharply after the ternary ball. This is due to the fact that a large balloon such as a chain double-dashed line appearing in the unwound yarn from below the chess portion 4a and above the chess portion 4a. This is due to the alternating appearance of small balloons appearing in the unwound yarn. However, the presence of the diaphragm 32a restricts the upper balloon from the diaphragm 32a to the guide plate 10 to be small. Further, after the third coin, the shape of the chess portion 4a begins to gradually collapse, and even if the cylindrical body 31 is further lowered, there is no difference in the effect of suppressing sluffing and fluff. Therefore, as shown in FIG. 3D, in the unwinding after the ternary ball, the tubular body 31 does not follow the unwinding and remains at the predetermined position. That is, the inner diameter restricting portion at the lower end of the tubular body 31 must be sequentially lowered in accordance with the unwinding from the beginning of unwinding to the third ball, and the aperture 32a of the tubular body 32 with aperture is unrolled from the third ball. It is necessary to stop at a predetermined position directly above the core tube 4b until the end. In this way, paying attention to the difference in the necessity of the tubular body 31 and the diaphragm 32a, the tubular body 31 as the lower balloon regulating member and the diaphragm 32a as the upper balloon regulating member are divided, and the action points thereof are different. It is a thing.

Next, a specific example of the effect of the above-described unwinding assisting device will be described with reference to FIGS. 4 to 6. FIG. 4 is a diagram showing the time course of unwinding tension. FIG. 4 (a) shows the case of using the unwinding assisting device of the present invention, and FIG. 4 (b) shows the case of using the conventional fixed quadrangular pyramid cylinder. Further, a yarn supplying bobbin wound with a yarn of Ne40 made of 100% cotton was unwound at 1500 m / min. In FIG. 4 (b) of the conventional example, the unwinding tension increases from the vicinity of the third ball with a large variation. The average unwinding tension of 20 g finally increased to 50 g, and the fluctuation range was 30 g. In the example of the present invention, although the unwinding tension increases, it gradually increases. The average unwinding tension of 20 g finally increased to 35 g, and the fluctuation range was 15 g, and both the degree of increase and the fluctuation range were halved compared to the conventional example.

FIG. 5 is a diagram showing the relationship between the winding speed and the number of sluffing. Using a yarn feeding bobbin wound with 100% cotton and Ne 47, the number of sluffing that occurs during the unwinding of one yarn feeding bobbin was observed for 12 yarn feeding bobbins, and the average value was obtained. Is shown. In the conventional example, when the winding speed exceeds 1000 m / min, the number of sluffing starts to increase. At 1500 m / min, slashing occurs nearly 20 times, and the yarn breakage occurs frequently due to the interaction with the increase and fluctuation of the unwinding tension in Fig. 4, making practical continuous operation impossible. In the example of the present invention, the number of sluffing starts to increase from around the winding speed of 1300 m / min, and it is several times even at 1500 m / min. Therefore, the yarn breakage does not increase during continuous operation at 1300 m / min with almost no sluffing.

FIG. 6 is a diagram showing the relationship between the winding speed and the fluff. As in the case of FIG. 4, a yarn supplying bobbin wound with a yarn of Ne40 of 100% cotton was used. The unit of fluff is mm, and represents the total length of fluff expressed in a sample yarn of 1 cm. The fluff of the yarn supplying bobbin before winding is 5. It is slightly below 00. In the conventional example, the take-up speed increases with the increase of the take-up speed and the fluff. In the example of the present invention, even if the winding speed is increased, the degree of increase of the fluff is extremely small, and is greatly reduced as compared with the conventional example. That is, even if wound at 1300 m / min, which is much higher than the conventional 1000 m / min, the amount of fluff does not increase.

By the way, although the above-mentioned unwinding assisting device is unrolled by a sensor that can be lifted up and down, the unwinding assisting device needs to be in the retracted position during yarn splicing as shown in FIG. An independent movement different from 33 is required. Therefore, an efficient movement of the cylindrical body that does not reduce the winding efficiency will be described below. In FIG. 2, when the yarn traveling signal from the slab catcher 8 (a signal indicating that winding is normally performed) is turned off, a series of yarn splicing operations is started. Starting from the turning OFF of the yarn traveling signal, the tubular body 31 and the throttled tubular body 32 of the unwinding assisting device 30 quickly rise to the retracted position indicated by the solid line, regardless of the output of the sensor 33. That is, the series of yarn splicing operations and the raising of the tubular body 31 and the iris-equipped tubular body 32 are performed in parallel. Then, a series of yarn splicing operations (including the operation of the lever 20) is performed. When the yarn splicing is successful and the yarn starts to be wound, the yarn traveling signal from the slab catcher 8 changes to ON. Starting from the ON of the yarn traveling signal, the tubular body 31 and the tubular body 32 with a diaphragm shift to a normal lowering operation, and the tubular body 31 stops when the output of the sensor 33 is switched from OFF to ON. In this way, when the unwinding assisting device operates with reference to OFF or ON of the yarn traveling signal from the slab catcher 8, the movement of the tubular body 31 is not wasted.

The winding speed after the yarn splicing is gradually increased to reach a predetermined winding speed. The degree of this speed increase can be changed by the controller 40 of the winding unit. If the winding speed is increased rapidly, the lowering of the tubular body 31 may be delayed and yarn breakage may occur. Therefore, the descending speed of the tubular body 31 is related to the degree of increase in the winding speed (for example, when the increasing speed of the winding speed is fast, the controller 40 of the winding unit is set in advance so that the lowering speed of the tubular body 31 is also increased. It is preferable to lower the tubular body 31 to a predetermined position before the dangerous winding speed at which the occurrence of yarn breakage is predicted.

Further, in the case of a yarn which is less likely to cause warp, the lever 20 as the anti-rattle device in FIG. 2 is not necessarily operated. At this time, the tubular body 31 and the throttled tubular body 32 need only be raised to the retracted position only when the bobbin is changed, and the yarn detected at the first stage of the yarn splicing operation started by the yarn traveling signal OFF of the slab catcher 8. The tubular body 31 and the tubular body 32 with a diaphragm can be raised to the retracted position with reference to the signal indicating that the lower thread of the filler 9 is not present.

FIG. 7 shows another preferred embodiment of the tubular body as the lower balloon regulating member. An umbrella-shaped enlarged portion 41 is attached below the inner diameter regulating portion 31d of the cylindrical body 31. The enlarged portion 41 needs to be smoothly connected to the inner diameter regulating portion 31d, and the curvature radius R of the corner is selected to be 3 mm or more. Due to the enlarged portion 41, the running of the yarn in the inner diameter regulating portion 31d of the tubular body 31 becomes smooth, and the generation of fluff is further suppressed. In the unwinding of thick yarn, the lower balloon tends to inflate outward like a chain double-dashed line due to a large centrifugal force, and as a result, the balloon tends to become unstable. However, the enlarged portion 41 restricts the excessively large lower balloon to an appropriate inflation, and stabilizes the balloon.

FIG. 8 shows another embodiment of the cylindrical body as the lower balloon regulating member. The cylindrical body 31 is provided with a vertical slit 42. Regarding the bobbin change, not only the automatic winder of FIG. 11 that carries, feeds, winds, and discharges to the winding unit while inserting the yarn supplying bobbins 4 into the independent trays 18, each unit has a plurality of units. There is an automatic winder with a magazine that stores bobbins. In the automatic winder having this magazine, since the yarn supplying bobbin is supplied while pulling the yarn from above, the yarn can be passed through this slit 42. As described above, the cylindrical body does not necessarily have to have a continuous side wall in the circumferential direction.

FIG. 9 shows another embodiment of the upper balloon regulating member. In FIG. 9A, the yarn supplying bobbin 4 has a normal length, and there is a margin in the distance from the core tube 4b to the guide plate 10. A triangular plate 43 serving as an upper balloon regulating member is provided above the retracted position of the cylindrical body 31 serving as a lower balloon regulating member so as to be horizontally movable. Before threading, the triangular plate 43 is at the retracted position indicated by the solid line, but after threading is completed, it advances to the operating position indicated by the chain double-dashed line. As shown in FIG. 9B, the inner corner 43a of the triangular plate 43 is within the outer diameter of the core tube 4b, and the yarn path can be restricted. Then, as shown in FIG. 9C, only the cylindrical body 31 descends, and the triangular plate 43 remains at the operating position. Also in this case, the height H from the top of the core tube 4b to the triangular plate 43 needs to be 180 mm or less. This is because if it exceeds 180 mm, the free portion after the yarn supplying bobbin 4 becomes too long, and the upper balloon is not regulated sufficiently. Instead of the triangular plate 43 as the upper balloon regulating member, a U-groove plate or a parallel two-plate plate can be used.

FIG. 10 shows another embodiment of the lower balloon regulating member and the upper balloon regulating member. In FIG. 10A, the lower balloon regulating member is formed by stacking multistage open / close cylinders 44a to 44g with a gap ε. As shown in FIG. 10 (c), one opening / closing cylinder has a pair of semicircular members 45, 46 attached to levers 48, 49 rotatably supported by a shaft 46. When the levers 48 and 49 are closed by the driving member 50, an inner diameter restricting portion that restricts the lower balloon is formed. FIG. 10A shows an operating state in which only the uppermost opening / closing cylinder 44a is closed. As the unwinding of the chess portion 4a progresses, the opening / closing cylinders 44b → 44g close, and the inner diameter restricting portions of the opening / closing cylinders 44a to 44g follow the unwinding. Further, a sensor (not shown) for detecting the chess portion 4a descends as the opening / closing cylinders 44a to 44g close. Further, the gap ε between the open / close cylinders 44a to 44g may be zero, but it is preferable to have a certain gap ε in order to confirm the unwound state of the yarn supplying bobbin. The upper balloon regulating member is composed of the opening / closing lever 51. As shown in FIG. 10 (b), when the dog-legged levers 51 a and 51 b are closed by the drive member 52, a rhombus-shaped yarn path regulation space 53 is formed. The size of this space 53 is also set within the outer diameter of the top of the core tube 4b. As described above, the cylindrical body as the lower balloon regulating member does not need to be continuous in the axial direction of the yarn supplying bobbin 4, and may be discontinuous. For example, it is possible to use a simple opening / closing ring. Further, since it is the lower balloon regulating member and the upper balloon regulating member that can be opened and closed, there is an advantage that bobbin change and threading can be easily performed.

[0031]

The unwinding assisting device according to the present invention has an inner diameter regulating portion that is smaller than the outer diameter of the yarn layer of the yarn supplying bobbin and larger than the outer diameter of the core tube, and follows the unwinding of the yarn supplying bobbin. It is equipped with a cylindrical balloon regulating member that covers the bobbin and widens the yarn balloon at the inner diameter regulating part to increase the unwinding angle. Up to), when the inner diameter regulating portion smaller than the outer diameter of the yarn layer of the yarn feeding bobbin and larger than the outer diameter of the core tube is followed by the unwinding, the unwinding angle from the chess portion is appropriately maintained, and sluffing and fluff are reduced. In addition, an enlarged portion having a corner of 3 mmR or more is attached below the inner diameter regulating portion so as to be smoothly continuous, and the balloon is regulated to an appropriate bulge and stabilized, and fluff generation and unwinding tension are suppressed. Fluctuations are suppressed, increasing thread breakage and fluff. The winding speed can be increased without causing it.

[Brief description of drawings]

FIG. 1 is a perspective view of an unwinding assisting device according to the present invention.

FIG. 2 is a perspective view showing an operating state of the unwinding assisting device of the present invention.

FIG. 3 is a view showing a yarn unwinding method by the unwinding assisting device of the present invention.

FIG. 4 is a diagram showing a change in unwinding tension.

FIG. 5 is a graph showing the relationship between the winding speed and the number of sluffings.

FIG. 6 is a graph showing a relationship between a winding speed and fluff.

FIG. 7 is a cross-sectional view showing another embodiment of the lower balloon regulating member.

FIG. 8 is a cross-sectional view showing another embodiment of the lower balloon regulating member.

FIG. 9 is a cross-sectional view showing another embodiment of the upper balloon regulating member.

FIG. 10 is a view showing another embodiment of the lower balloon regulating member and the upper balloon regulating member.

FIG. 11 is a device layout view of a winding unit.

FIG. 12 is a perspective view of a main part of the winding unit.

[Explanation of symbols]

 30 Unwinding assisting device 31 Cylindrical body (lower balloon regulating member) 41 Enlarged part

Claims (1)

[Scope of utility model registration request] 1. A yarn feeding bobbin having an inner diameter regulating portion smaller than the outer diameter of the yarn layer and larger than the outer diameter of the core tube, covering the yarn feeding bobbin while following the unwinding of the yarn feeding bobbin, and the yarn at the inner diameter regulating portion. A balloon-shaped regulating member having a cylindrical shape that expands the balloon to increase the unwinding angle, and an enlarged portion having a corner of 3 mmR or more that is smoothly continuous to the inner diameter regulating portion and is below the inner diameter regulating portion. An unwinding assist device for an automatic winder characterized by being attached.