JPH0578019A - Unreeling auxiliary device for automatic winder - Google Patents

Abstract

PURPOSE:To provide a proper shape of a balloom regulating member in the unreeling auxiliary device for an automatic winder which can increase practical taking-up speed. CONSTITUTION:The unreeling auxiliary device is provided with a balloom regulating member 31 which has an inside diameter regulating part smaller than the yarn layer outside diameter of a yarn feed bobbin and larger than the outside diameter of a core pipe and covers the yarn feed bobbin while following unreeling of the yarn feed bobbin, and is also provided with an enlarged part 41 with a corner of more than 3mmR attached to an inside diameter regulating part 31d.

Description

Detailed Description of the Invention

[0001]

[Industrial field] For example, an automatic winder that splices a large number of bobbines produced by a ring spinning machine and removes defective parts such as slabs and winds them into one corn or cheese-shaped winding package. The present invention relates to an unwinding assisting device, and more particularly to an unwinding assisting device capable of increasing the winding speed.

[0002]

2. Description of the Related Art An automatic winder is a winding unit in which a large number of weights are arranged in parallel.
This will be described with reference to 1.

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 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 tenser 7 for applying tension, a slab catcher 8 for detecting a defective portion of the yarn, etc., the yarn is wound by a traverse drum 13 into a 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. A unit has the above-mentioned members, and a large number of such winding units 1 are arranged in parallel to constitute one automatic winder. Further, the yarn feeding bobbins 4 are inserted in the trays 18 which are independent of each other, and the feeding conveyor 1
It is supplied to the winding position A of the winding unit 1 via 1 and the rotary disc 19. 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 into 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 operates to cut the yarn, and the slab catcher 8
The yarn splicing is performed starting from the yarn traveling signal OFF. This yarn splicing operation will be described with reference to FIG. In FIG. 12, the suction mouth 16 swivels in the direction, and its suction port 16a has a traverse drum 13 and a winding package 14.
And the yarn end of the winding package 14 is sucked.
When the suction mouth 16 reaches a predetermined position, the traverse drum 13 or the winding package 14 is reversed by the reverse rotation of the reverse rotation roller or the drive motor in the machine frame 5 to loosen the yarn,
The yarn end is sucked into the suction mouth 16. 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, the suction mouth 1 sucking the yarn end on the winding package side and the yarn end on the yarn supplying bobbin side.
When 6 and the relay pipe 17 turn in the opposite direction and return to the position shown in the drawing, the yarn enters the yarn joining device 15 and the yarn joining is 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 carried out starting from the yarn traveling signal OFF of the slab catcher 8.
However, if the yarn supplying bobbin becomes empty, the yarn joining operation fails because there is no lower yarn. Therefore, a yarn feeler 9 for confirming the presence or absence of the lower yarn is provided below the tenser 7. If the yarn feeler 9 does not detect the lower yarn, the bobbin change is performed in parallel with the yarn joining 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 thread may be a mechanical one or one using an optical sensor.

In the winding unit 1 described above, one corn or cheese-shaped winding is performed while removing defective parts such as slabs from the yarn unwound from the yarn supplying bobbin and performing splicing for each yarn supplying bobbin. To form a package
The productivity depends largely on the winding speed. However, in the conventional automatic winder, the practical winding speed is 1
It was around 000 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 a third ball becomes 1/3, but if the degree of this unwinding 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 intertwined with each other like a loop drop and are unwound at a stretch without being unwound stably from the chess portion 4a of the yarn supplying bobbin 4, leading to yarn breakage. 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 limited 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, the balloon breaker 6 is attached from the lower side of the guide plate 10 to the yarn feeding bobbin 4.
Since it is located on the upper side of the yarn feeding bobbin 4 and is fixed to the machine base 5, the unwinding of the yarn feeding bobbin 4 proceeds and the yarn feeding bobbin 4
The distance from the chess portion 4a to the lower end of the balloon breaker 6 gradually increased, and the function of the balloon breaker 6 tended to deteriorate. Therefore, it has been proposed to make the balloon breaker 6 cylindrical so as to follow the unwinding of the yarn feeding bobbin and gradually lower it.

[0008]

However, the shape of the conventional balloon breaker is not appropriate, so that (a)-
It was not possible to comprehensively deal with the phenomenon of (c).
As a result, there is a problem that the practical winding speed around 1000 m / min cannot be increased.

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

[0010]

In order to achieve the above object, an 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.
A balloon regulating member covering the yarn feeding bobbin while following the unwinding of the yarn feeding bobbin is provided, and the inner diameter regulating portion has a diameter of 3 mmR.
An enlarged portion having the above corners is attached.

[0011]

[Function] From the beginning of unwinding to the unwinding of a predetermined amount (after the ternary ball), when the inner diameter regulating portion smaller than the outer diameter of the yarn layer of the yarn supplying bobbin and larger than the outer diameter of the core tube follows the unwinding, The unwinding angle of is properly maintained and sluffing and fluffing are reduced. Further, the enlarged portion having the corner of 3 mmR or more attached to the inner diameter regulating portion suppresses the generation of fluff and the fluctuation of the unwinding tension.

[0012]

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

In FIG. 1, an unwinding assisting device 30 comprises 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 upper and lower sides of the cylindrical body 31 as the lower balloon regulating member are open, and the lifting block 3 is provided on the side surface of the cylindrical body 31.
It has a first arm 31a to which 5 is attached. The elevating block 35 is vertically slidably inserted into a rod 37 suspended from a fixed block 36, and the piston rod 3 of a cylinder 38 erected on the fixed block 36.
8a, the cylinder 31 can be raised and lowered according to the expansion and contraction of the rod 38a of the cylinder 38. This cylinder 31
Sequentially descends so that the distance L1 from the chess portion 4a of the yarn supplying bobbin 4 becomes substantially constant, and covers the core tube 4b of the yarn supplying bobbin 4. Then, the unwinding angle is increased by appropriately maintaining the spread of the balloon (the lower balloon with respect to the cylindrical body 31) of the yarn unwound from the chess portion 4a, and plays the role of suppressing the occurrence of sluffing and fluff.

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 supplying bobbin 4 is important. Chess part 4
The inner diameter D of the lower end of the cylindrical body 31 that controls the balloon of the yarn unwound from a 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, 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 cylindrical body 31.
Has a diameter d1 larger than the apex at the lowest position (shown by the chain double-dashed line). 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 tubular body 31 is up to the third ball, and there is no difference in the degree of the effect even if it is further lowered or not lowered. Therefore, the cylinder body 31 may have the position of the two-dot chain line near the third ball, which is determined by the length of the piston rod 38a of the cylinder 38, as the lowest position, and the diameter d1 + the gap of 2 to 3 mm in diameter = the inner diameter D of the cylinder body 31. preferable.

The cylindrical body 32 with an aperture as the upper balloon regulating member is inserted into the outer periphery of the cylindrical body 31 as the lower balloon regulating member. Therefore, the cylindrical body 32 with a diaphragm is the cylindrical body 3
It descends with the sequential decrease of 1. However, the cylindrical body 32 with a diaphragm
An arm 32c with a slit 32d is attached to the, and a magnet 32b is attached to the lower side of the arm 32c. The slit 32d is guided by the stopper shaft 34, and the magnet 32 is attached to the plate 34a at the lower end of the stopper shaft 34.
When b and the arm 32c hit, the descent of the apertured cylinder 32 is stopped. That is, at the latest when the thread tension starts to increase remarkably, the third cylinder 32 with stop stops lowering, and the stop 32a is positioned directly above the core tube 4b. The diaphragm 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 which regulates the yarn path are important. The diaphragm 32a is 4 to 180 from the top of the core tube 4b.
Must be located mm above. If it is less than 4 mm, the diaphragm 32a comes too close to the core tube 4b, and the yarn path becomes unreasonable. This is because 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 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. Preferably, the inner diameter is 4 to 6 mm
The aperture is good. 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, the distance from the top of the core tube 4b to the guide plate 10 can be shortened, and the unwinding assisting device 30 makes the winding unit taller. Is prevented from becoming.

Next, the sensor 33, the cylinder 38, and the controller 40 as the 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, and the piston rod 38a of the cylinder 38. Gradually expands, and the tubular body 31
The distance L1 between the chess part 4a and the chess part 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,
There is a detector in which detectors composed of phototransistors or photodiodes are arranged in a crossed or parallel manner, and light from the light source is diffused and reflected by the object to be detected and is detected by the detector. As shown in the figure, as the unwinding of the chess portion 4a progresses, the distance from the sensor 33 to the chess portion 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 causes the cylinder 38 to pass through the switching valve 39.
Stop the piston rod 38a. By repeating this, the cylindrical body 31 descends sequentially with the unwinding. The sensor 33 that monitors the chess portion 4a is not limited to the horizontal direction, but can be attached at any angle from directly 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. For the slab catcher 8, for example, one that measures a change in capacitance is used, and not only the yarn defect but
It is possible to detect whether the yarn is running. If the slab catcher 8 does not issue the yarn traveling signal, the yarn splicing operation is performed. In this case, the lower yarn released from the tensor is held by the relay pipe, but when the relay pipe turns from the bottom to the top, the yarn unwound from the yarn supplying bobbin may be twisted. Therefore, in order to unravel the yarn in which the kink is likely to occur, a lever 20 as a kink preventing 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 lower yarn by the lever 20 to prevent the warp. Due to the operation of the lever 20 serving as the anti-rattle generation device, the tubular body 31 and the apertured tubular body 32 of the unwinding assisting device 30 are in the retracted positions indicated by solid lines.
The operation of the lever 20 can also 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. In this case as well, the tubular body 31 and the tubular body 32 with the diaphragm of the unwinding assisting device 30 are in the retracted position indicated by the solid line,
When the new yarn supplying bobbin 4 reaches the predetermined position, the lever 20 moves from the retracted position indicated by the chain double-dashed line to the operating position indicated by the solid line, and splicing is performed while preventing the occurrence of chattering.

Next, a yarn unwinding method using the above-described unwinding assisting device 30 will be described with reference to FIG. Fig.3 (a)-
(D) is a figure which shows how the cylinder 31 and the cylinder 32 with a diaphragm 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 supplying bobbin is supplied following empty bobbin discharge. Then, as shown by the chain double-dashed line, the cylindrical body 3
The inner diameter regulating portion at the lower end of 1 descends to an operating state where it covers the core tube 4b. FIG. 3B shows the state of the quintuplet, and the cylindrical body 31
And the cylindrical body 32 with a diaphragm descend, and the diaphragm 32a is in 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 it is unwound with the yarn remaining on the yarn feeding bobbin. As a result of less friction between the threads, the occurrence of sluffing and fluff is suppressed. FIG. 3C shows the state of the three-divided ball, 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 third ball, but this is due to the chess part 4
This is because a large balloon such as a chain double-dashed line that appears in the yarn unwound from a below and a small balloon that appears in the yarn unwound from above chess portion 4a appear alternately.
However, due to the presence of the diaphragm 32a, the diaphragm 32a
The upper balloon from the guide plate 10 to the guide plate 10 is restricted to a small one. Also, after this third ball, the chess part 4
It is the time when the shape of a starts to collapse gradually, and even if the tubular 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 third ball, the tubular body 31 does not follow the unwinding and remains at the predetermined position. That is, the tubular body 31
The inner diameter restricting portion at the lower end must sequentially descend in accordance with the unwinding from the beginning of unwinding to the third ball.
The diaphragm 32a must be stopped at a predetermined position just above the core tube 4b from the third ball to the end of unwinding. 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 their action points are different. Is.

Next, a specific example of the effect of the above-described unwinding assisting device will be described with reference to FIGS. FIG. 4 is a diagram showing the time course of unwinding tension. FIG. 4A shows the case where the unwinding assisting device of the present invention is used, and FIG. 4B shows the case where the conventional fixed quadrangular pyramid cylinder is used. Further, a yarn supplying bobbin in which a yarn of Ne40 was wound with 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, while largely fluctuating. The average unwinding tension was 20g, but finally increased to 50g, and the fluctuation range was 3
It is 0g. In the example of the present invention, although the unwinding tension is increased, it is gradually increased. 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 feed bobbin wound with 100% cotton Ne47, the number of sluffing that occurs while one yarn feed bobbin is unwound is observed for 12 yarn feed bobbins, and the average value is calculated. It 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, slacking occurs nearly 20 times, and the yarn breaks frequently due to the interaction with increase / fluctuation of the unwinding tension shown in FIG. 4, making practical continuous operation impossible. In the present invention example, a winding speed of 1300 m / m
The number of sluffing starts to increase near in, 1500m
Even at / min, it is several times. Therefore, the yarn breakage does not increase in the continuous operation of 1300 m / min with almost no sluffing.

FIG. 6 is a diagram showing the relationship between the winding speed and the fluff. As in FIG. 4, a yarn supplying bobbin wound with a yarn of Ne40 made of 100% cotton was used. The unit of fluff is mm, and 1c
The total length of the fluff expressed in the sample yarn of m is shown. The fluff of the yarn supplying bobbin before winding is slightly less than 5.00. In the conventional example, the take-up speed increases as the take-up speed increases, and the fluff also increases. In the example of the present invention, even if the winding speed is increased,
The degree of fluff increase is extremely small, and it is greatly reduced compared to the conventional example. That is, the conventional 1000 m / mi
Even if wound at 1300 m / min, which is much higher than n, the amount of fluff does not increase.

By the way, the above-mentioned unwinding assisting device has a unwinding follow-up by a cylindrical body which can be raised and lowered by a sensor.
As shown in FIG. 2, it is necessary to be in the retracted position at the time of yarn joining, and an independent movement different from the sensor 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. The tubular body 3 of the unwinding assisting device 30 is started regardless of the output of the sensor 33, starting from the turning off of the yarn traveling signal.
1 and the cylindrical body 32 with a diaphragm are quickly raised to the retracted position indicated by the solid line. 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 when the output of the sensor 33 switches from OFF to ON, the tubular body 31 stops. 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 cylindrical body 31 may be delayed, and thread breakage may occur. Therefore, the descending speed of the tubular body 31 is associated with the degree of increase in the winding speed (for example, if the increasing speed of the winding speed is fast, the controller 40 of the winding unit is set in advance so that the descending speed of the tubular body 31 is also increased. (Programming), until the dangerous winding speed at which the occurrence of yarn breakage is predicted is reached.
Is preferably lowered to a predetermined position.

Further, in the case of a thread which is unlikely to cause warp,
The lever 20 is not necessarily used as the anti-rattle device in FIG.
Does not work. At this time, the tubular body 31 and the tubular body 32 with a diaphragm may be raised to the retracted position only when the bobbin is changed, and the yarn traveling signal of the slab catcher 8 is turned off.
The tubular body 31 and the throttled tubular body 32 can be raised to the retracted position on the basis of the signal indicating that there is no lower thread of the yarn filler 9 detected at the first stage of the yarn splicing operation started by.

FIG. 7 shows another preferred embodiment of the cylindrical body as the lower balloon regulating member. Inner diameter regulating portion 3 of the cylindrical body 31
An umbrella-shaped enlarged portion 41 is attached below 1d. 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 inner diameter regulating portion 31 of the tubular body 31
The yarn travels smoothly at d, and the generation of fluff is further suppressed. In the unwinding of thick yarn, the lower balloon tends to inflate outward like a two-dot chain 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 bulge and stabilizes the balloon.

FIG. 8 shows another embodiment of the cylindrical body as the lower balloon regulating member. Vertical slits 42 on the cylinder 31
Is provided. Regarding bobbin change, not only the automatic winder shown in FIG. 11 that carries, feeds, winds, and discharges to and from the winding unit while inserting the yarn supplying bobbins 4 into the independent trays 18, but 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 tubular body does not necessarily have the side wall continuous in the circumferential direction.

FIG. 9 shows another embodiment of the upper balloon regulating member. In FIG. 9A, the yarn feeding bobbin 4 has a normal length, and there is a margin in the distance from the core tube 4b to the guide plate 10. Cylindrical body 31 as lower balloon regulating member
On the upper side of the retracted position of the
A square plate 43 is provided so as to be movable in the horizontal direction.
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 can regulate the yarn path. 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 feeding bobbin 4 becomes too long, and the upper balloon is insufficiently regulated. 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 a multistage open / close cylinder body 44a-
44 g are stacked with a gap ε. Figure 10
As shown in (c), one opening / closing cylinder has a pair of semicircular members 45, 46 attached to levers 48, 49 rotatably supported by a shaft 46. Levers 48, 49
When is 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 top opening / closing cylinder 44a is closed. As the unwinding of the chess part 4a progresses, the opening / closing cylinder 44b → 44g
Is closed, and the inner diameter regulating portions of the opening / closing cylinders 44a to 44g follow the unwinding. Further, a sensor (not shown) that detects the chess portion 4a descends as the opening / closing cylinders 44a to 44g close. The clearance ε between the open / close cylinders 44a to 44g may be zero,
In order to confirm the unwound state of the yarn supplying bobbin, it is preferable to have a certain clearance ε. 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, the rhombus-shaped yarn path regulation space 53 is formed.
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 serving 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 of 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. The inner diameter regulating portion is provided with an enlarged portion having a corner of 3 mmR or more, and a predetermined amount of unraveling (from the three-quarter ball) is provided. When the inner diameter regulating portion that is smaller than the outer diameter of the yarn layer of the yarn supplying bobbin and that is larger than the outer diameter of the core tube is made to follow the unwinding, the unwinding angle from the chess portion is appropriately maintained, and sluffing and fluffing are reduced. 3mm attached to the inner diameter regulation part
The enlarged portion having the corners of R or more suppresses the generation of fluff and the fluctuation of the unwinding tension, so that the winding speed can be increased without increasing yarn breakage and fluff.

[Brief description of drawings]

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

FIG. 4 is a variation diagram of 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 the relationship between 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 diagram 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 portion

Claims (1)

[Claims] 1. A balloon regulating member having an inner diameter regulating portion smaller than the outer diameter of the yarn layer of the yarn supplying bobbin and larger than the outer diameter of the core tube, the balloon regulating member covering the yarn supplying bobbin while following the unwinding of the yarn supplying bobbin. An unwinding assisting device for an automatic winder, wherein the inner diameter regulating portion is additionally provided with an enlarged portion having a corner of 3 mmR or more.