JP2547211Y2 - Automatic winder unwinding assist device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION For example, an automatic winder that splices a large number of yarn supplying bobbins produced by a ring spinning machine and winds the yarn into a cone or cheese-like winding package while removing defective portions such as slabs. Regarding the unwinding assist device,
In particular, the present invention relates to an unwinding assisting device capable of increasing a winding speed.

[0002]

2. Description of the Related Art In an automatic winder, a plurality of weights of a winding unit are arranged in parallel.
This will be described below.

In FIG. 7, 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 supplied to a predetermined position of the unit is supplied to a balun breaker 6, and Traverse drum 1 passing through a disk or gate type tensor 7 for applying a tension, a slab catcher 8 for detecting a defective portion of the yarn, and the like.
3 is wound around the winding package 14 which rotates.
Reference numeral 15 denotes a yarn splicing device, 16 denotes a suction mouth that guides the upper thread of the package to the yarn splicing device 15, and 17 denotes a relay pipe that guides the lower yarn of the yarn supplying bobbin to the yarn splicing device 15. The unit has each of the above members, and a 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 rotating disk 19 while being inserted into the independent trays 18. Then, 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 supplying bobbin 4 at the winding position A
The yarn end Y1 is inserted into the hollow portion of the head of the yarn supplying bobbin 4 so that the yarn Y is blown up and sucked into the relay pipe 17.

In the winding unit 1 described above, a cone or cheese-like single winding is performed while removing defective portions such as slabs from the yarn unwound from the yarn supplying bobbin, and performing yarn splicing for each yarn supplying bobbin. To form a package,
The productivity will depend greatly on the winding speed. However, with a 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 suddenly increases from the point in time when the remaining unwinding amount called the third ball becomes と な っ, and if the degree of this increase becomes large, the tension causes thread breakage. (B) Sluffing increases as the winding speed increases. The sluffing refers to a state in which a plurality of coils are entangled with each other and unwound at once at a time like a loop-through without being stably unwound from the chess portion 4a of the yarn supplying bobbin 4, leading to yarn breakage. Cause. (C) 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. For this reason, as shown in FIG. 7, the balloon of the yarn unwound from the yarn supplying bobbin 4 is limited by a balloon breaker 6 which is a quadrangular pyramid tube, and the balloon is kept appropriate so as not to spread too much. However, since the balloon breaker 6 is located above the yarn supplying bobbin 4 from below the guide plate 10 and is fixed to the machine base 5, the unwinding of the yarn supplying bobbin 4 proceeds and the yarn supplying bobbin 4 4, the distance from the chess part 4a to the lower end of the balloon breaker 6 gradually increased, and the function of the balloon breaker 6 tended to deteriorate. In view of this, there has been proposed a balloon breaker 6 having a cylindrical shape and gradually descending following the unwinding of the yarn supplying bobbin.

[0006]

However, the conventional balloon breaker is not appropriate in its shape.
It was not possible to comprehensively cope with the phenomenon (c).
As a result, there was a problem that the practical winding speed of about 1000 m / min was not increased.

The present invention has been made in view of the above-mentioned problems of the prior art, and has been made in consideration of the above-described problems. An object of the present invention is to provide an unwinding assisting device for a winder.

[0008]

The unwinding assisting device according to the present invention, which achieves the above object, covers the yarn supplying bobbin, and its regulating position is lowered in accordance with the unwinding, so that the yarn unwound from the chess portion is removed. A first cylinder for expanding the balloon, a second cylinder inserted into the first cylinder, and a throttle attached to the second cylinder, which is located above the yarn supplying bobbin and regulates a yarn path. It is provided.

When the balloon of the yarn unwound from the yarn supplying bobbin in the first cylindrical body is larger than the outer diameter of the yarn supplying bobbin at the unwinding position, the angle of unwinding from the chess portion is appropriately maintained, and sluffing and fluffing are performed. Is reduced. In addition, when the balloon above the yarn supplying bobbin is restricted by the throttle provided on the second cylindrical body so as to be small, the rise and fluctuation of the unwinding tension are suppressed.

[0010]

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

In FIG. 1, the unwinding assisting device 30 includes a first
A main body includes a cylindrical body 31 as a restricting member, a throttled cylindrical body 32 as a second restricting member, and a sensor 33, a cylinder 38, and a controller 40 as follow-up mechanisms.

The cylindrical body 31 as a first regulating member is open at the top and bottom, and has a first arm 31a to which a lifting block 35 is attached on the side surface of the cylindrical body 31. The elevating block 35 is vertically slidably inserted into a rod 37 suspended from the fixed block 36, and
Is connected to a piston rod 38a of a cylinder 38 erected in the vertical direction, and the cylinder 31 can be moved up and down in accordance with expansion and contraction of the rod 38a of the cylinder 38. The tubular body 31 descends so that the distance L1 of the yarn supplying bobbin 4 from the chess portion 4a becomes substantially constant, and covers the core tube 4b of the yarn supplying bobbin 4. Then, the balloon Y1 of the yarn unwound from the chess part 4a is regulated so as to be larger than the yarn supplying bobbin outer diameter d at the unwinding position, and its spreading is appropriately maintained to increase the unwinding angle, and the sluffing is performed. And plays the role of suppressing the generation of fluff.

The inner diameter D of the inner diameter regulating portion, which is the lower end of the cylindrical body 31, is smaller than the outer diameter of the yarn layer of the yarn supplying bobbin 4, and the core tube 4b
Is larger than the outside diameter of In general, the core tube 4b and the yarn layer of the yarn supplying bobbin 4 have a conical shape, and the yarn 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 cylindrical body 31 ( The diameter d which is larger than the top part
One. Therefore, the inner diameter D of the cylindrical body 31 is smaller than D1 and larger than d1. The inner diameter D of the cylindrical body 31 is preferably as close as possible to d1.

The throttle-provided cylinder 32 as a second regulating member is inserted around the outer periphery of the cylinder 31 as the first regulating member.
Accordingly, the throttled cylinder 32 descends as the cylinder 31 sequentially descends. However, the throttle 32 has a slit 32.
An arm 32c with d is attached, and a magnet 32b is attached below the arm 32c. 32d slit
Are guided by a stopper shaft 34, and the stopper shaft 3
When the magnet 32b and the arm 32c hit the plate 34a at the lower end of the four, the lowering of the throttled cylinder 32 stops. That is,
At the latest, at the point when the thread tension starts to increase remarkably, the throttle body 32 with the throttle stops stopping and the throttle 32a is positioned directly above the core tube 4b. This aperture 3
2a regulates the yarn path, and the guide plate 10
Is restricted so as to be smaller than the inner diameter D of the cylindrical body 31 to prevent a large fluctuation of the balloon Y2, suppress an increase in the thread tension, and narrow the fluctuation width.

The inner diameter of the aperture 32a is not more than the outer diameter of the top of the core tube 4b and not less than 2 mm. Core tube 4b
If the outer diameter of the top of the thread exceeds the
If it is less than the above, there is a problem in raising the yarn. Preferably, a diaphragm with an inner diameter of 4 to 6 mm is good. Also,
The apertured cylinder 32 is divided from the cylinder 31 and the cylinder 31 is inserted into the apertured cylinder 32, so that the cylinder 31 and the apertured cylinder 32 are in a standby state at the solid line position. The total height is lower.

Next, the sensor 33, the cylinder 38, and the controller 40 as the following mechanism will be described. The sensor 33 attached to the second arm 31b of the cylinder 31 detects the chess portion 4a of the yarn supplying bobbin 4, and the controller 40 receiving the input of the sensor 33 operates the switching valve 39, and the piston rod 38a of the cylinder 38 Gradually expands, and the cylindrical body 31
And the distance L1 between the chess part 4a and the chess part 4a can be kept substantially constant. As the sensor 33, a diffuse reflection type sensor is used. As illustrated, as the unwinding of the chess unit 4a progresses, the distance from the sensor 33 to the chess unit 4a increases, and the sensor 33 eventually issues an OFF signal. The controller 40 receiving the 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 unit 4a is shortened, and the sensor 33 eventually emits an ON signal. When the controller 40 receives the ON signal, the controller 40 controls the cylinder 38 via the switching valve 39.
Is stopped. By this repetition, the cylindrical body 31 descends sequentially with unwinding. The sensor 33 for monitoring the chess unit 4a is not limited to the horizontal direction, and can be attached at any angle from directly above the chess unit 4a to the horizontal.

Next, a yarn unwinding method by the unwinding assisting device 30 will be described with reference to FIG. FIG.
(D) is a figure which shows how the cylinder 31 and the cylinder 32 with a throttle regulate a balloon. In FIG. 7A, the solid line cylinder 31 and the throttled cylinder 32 are in the retracted position. In this retracted position, the inner diameter regulating portion at the lower end of the cylindrical body 31 is above the core tube 4b, and a new yarn supplying bobbin is supplied following the empty bobbin discharge. Then, as shown by the two-dot chain line, the inner diameter regulating portion at the lower end of the cylindrical body 31 is lowered to an operation state in which the inner diameter regulating portion covers the core tube 4b. FIG. 7B shows the state of a five-piece ball.
a is a predetermined position. In particular, the cylindrical body 31 is a chess part 4
a, the balloon of the yarn unwound from the chess portion 4a is made larger than the outer diameter of the yarn supplying bobbin at the unwinding position, and the unwinding angle θ of the yarn is kept large,
As a result of less rubbing between the yarn remaining on the yarn supplying bobbin and the yarn to be unwound, the occurrence of sluffing and fluff is suppressed. FIG. 3C shows the state of a three-piece ball, in which only the cylinder 31 descends, the cylinder 32 with the throttle remains stopped, and the aperture 32a is at a predetermined position directly above the core tube 4b. . In particular, there is a tendency for the unwinding tension to increase sharply after the third-divided ball, but this is caused by a large balloon such as a two-dot chain line appearing on the yarn unwound from below the chess portion 4a and from above the chess portion 4a. This is because small balloons appearing in the unwound yarn alternately appear. However, the presence of the throttle 32 a restricts the upper balloon from the throttle 32 a to the guide plate 10 to be smaller than the inner diameter of the cylindrical body 31. In addition, after the third ball, the shape of the chess portion 4a starts to gradually collapse, and even if the cylindrical body 31 is further lowered, there is no difference in the effect of suppressing the sluffing and the fluff. Therefore, as shown in FIG. 3D, in unwinding after the third ball, the cylindrical body 31 remains at a predetermined position without following the unwinding.

Next, specific examples of the effects of the above-described yarn unwinding method will be described with reference to FIGS. FIG. 4 is a diagram showing the time lapse of the unwinding tension. 3A shows a case where the unwinding assisting device of the present invention is used, and FIG. 3B shows a case where a conventional fixed quadrangular pyramid is used. Further, the yarn supplying bobbin wound with Ne40 yarn with 100% cotton was unwound at 1500 m / min.
In FIG. 2B of the conventional example, the unwinding tension increases while largely changing from around the third ball. Average unwinding tension 20
g finally increased to 50g, and the fluctuation range was 30g
It has become. In the present invention, although the unwinding tension is increased, it is gradually increasing. Average unwinding tension 2
0 g finally increased to 35 g, and the fluctuation range was 15
g, and the degree of increase and the range of fluctuation are halved compared to the conventional example.

FIG. 4 is a diagram showing the relationship between the winding speed and the number of sluffing. Using a yarn supplying bobbin wound with Ne47 yarn with 100% cotton, the number of sluffing generated while one yarn supplying bobbin is unwound is observed for 12 yarn supplying 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, nearly 20 times of sluffing occur, and the yarn breakage occurs frequently due to the interaction with the increase and fluctuation of the unwinding tension shown in FIG. 3, making practical continuous operation impossible. In the present invention, the winding speed is 1300 m / m.
The number of sluffs started to increase from near in 1500m
It is several times even at / min. Therefore, yarn breakage does not increase in the continuous operation at 1300 m / min with almost no sluffing.

FIG. 5 is a diagram showing the relationship between the winding speed and the fluff. Similar to FIG. 3, a yarn supplying bobbin wound with 100% cotton and Ne40 yarn was used. The unit of fluff is mm and 1c
The total length of the fluff expressed in the m sample yarn is shown. The fluff of the yarn supplying bobbin before winding is slightly lower than 5.00. In the conventional example, the winding speed is increased as the winding speed is increased. In the present invention, even if the winding speed increases,
The degree of fluff increase is extremely small, and is significantly reduced as compared with the conventional example. That is, the conventional 1000 m / mi
Even if it is wound at 1300 m / min, which is much larger than n, the amount of fluff does not increase.

FIG. 6 shows another embodiment of the first regulating member and the second regulating member. In FIG. 6A, the first regulating member is formed by stacking multi-stage opening / closing cylinders 44a to 44g with a gap ε. As shown in FIG. 6C, one opening / closing cylinder body has a pair of semicircular members 45, 46 attached to levers 48, 49 that are pivotally supported on a shaft 46. When the levers 48 and 49 are closed by the driving member 50,
An inner diameter regulating portion for regulating the lower balloon is formed. FIG. 6
(A) 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 and closing cylinders 44b → 44g close,
The inner diameter regulating portions 4a to 44g follow the unwinding. Further, a sensor (not shown) for detecting the chess portion 4a is lowered as the opening and closing cylinders 44a to 44g are closed. Further, the gap ε between the opening and closing cylinders 44a to 44g may be zero, but in order to check the unwinding state of the yarn supplying bobbin, a gap having a certain gap ε is preferable. The second regulating member is constituted by an opening / closing lever 51. As shown in FIG. 6B, when the dog-shaped levers 51a and 51b are closed by the drive member 52, a substantially circular yarn path regulating space 53 is formed. The size of the space 53 is also a space that fits within the outer diameter of the top of the core tube 4b. As described above, the cylindrical body serving as the first regulating member does not need to be continuous in the axial direction of the yarn supplying bobbin 4, and may be discontinuous.

[0022]

[Effect of the Invention] In the unwinding assisting device of the present invention, the first
Since the cylinder body keeps the unwinding angle from the chess part properly and reduces sluffing and fluff, and the restrictor regulates the balloon above the yarn feeding bobbin to be small to suppress the rise and fluctuation of the unwinding tension, The winding speed can be increased without increasing yarn breakage or fluff. That is, conventional 1000m
If the practical winding speed, which has been limited to / min, can be increased to, for example, 1300 m / min, the productivity of the automatic winder will be greatly improved, and its practical effect is large. In addition, the first cylindrical body is the second
Since it is a structure that is inserted into the cylinder, it overlaps in the standby state and can reduce the total height.

[Brief description of the drawings]

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

FIG. 2 is a diagram showing a yarn unwinding method by the device of the present invention.

FIG. 3 is a diagram showing a change in unwinding tension.

FIG. 4 is a graph showing the relationship between the winding speed and the number of sluffing.

FIG. 5 is a graph showing a relationship between a winding speed and fluff.

FIG. 6 is a view showing another embodiment of a first regulating member and a second regulating member.

FIG. 7 is a device layout diagram of a winding unit.

[Explanation of symbols]

 Reference Signs List 30 unwinding assisting device 31 cylinder (first cylinder) 32 cylinder with aperture (second cylinder) 32a aperture

Claims (1)

(57) [Scope of request for utility model registration] 1. A first cylindrical member that covers a yarn supplying bobbin, lowers its regulation position according to unwinding, and expands a balloon of yarn unwound from a chess portion, and is inserted into the first cylindrical member. An automatic winder unwinding assisting device comprising: a second cylindrical body; and a throttle attached to the second cylindrical body and located above the yarn supplying bobbin to regulate a yarn path.