JP2871599B2 - Winding method and device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a winding method for an automatic winder or the like which winds a yarn while traversing the yarn appropriately, and an apparatus therefor.

[0002]

2. Description of the Related Art As shown in FIG. 4, a winding unit 1 of an automatic winder includes a paper tube 3 while traversing a yarn Y from a spinning bobbin (not shown) provided at a lower portion by a traverse drum 2 as appropriate. And a package P having a predetermined shape is formed. Traverse drum 2
Is rotatably driven while being cantilevered by the frame 4 of the winding unit 1, and a traverse groove 5 is formed on the surface thereof. A cover 6 for preventing the yarn Y from jumping out of the groove 5 is provided on the front side of the traverse drum 2, and a guide member 7 for regulating the running of the yarn Y in accordance with the traverse width is provided in front of the cover 6. Is provided. On the upstream side of the yarn traveling of the guide member 7, the yarn Y
A slab catcher 8 that detects and cuts the defect (slab) of the slab is provided. In addition, the winding unit 1 is provided with a knotter for tying the yarn Y when the yarn breaks or the yarn is cut by the slab catcher 8, a suction mouth and a suction pipe for turning and transferring the upper and lower yarns to the knotter at the time of piecing. Have been.

[0003]

During the winding of the yarn Y by such an automatic winder, the yarn Y is traversed by the traverse drum 2.
(Slack) or the yarn bundle of the outer layer of the package P shifts to the small diameter side (scramble), and there is a problem that a defective package occurs. One possible cause of this phenomenon is that the tension of the yarn Y becomes unstable at the start of winding after piecing.
The generation of such a defective package cannot be prevented by the conventional cover 6 and guide member 7.

[0004]

[Summary of the present invention to solve the above problems, the winding method for winding while appropriately traverses the yarn, during the winding start, traverse in a normal winding Totoki
Traverse range regulation that moves the yarn closer to the center than the
And after the prescribed rise time has passed,
It is to cancel . Further, the present invention provides a winding device that winds a yarn while appropriately traversing the yarn, wherein the yarn restricting member is movable outside and outside the traverse range, and the yarn restricting member is advanced into the traverse range at the start of winding , and the predetermined
And a drive mechanism for returning to outside the traverse range after the elapse of the rising time . It is preferable that the drive mechanism drives the yarn regulating member at the start of rotation at the start of winding. The thread regulating member includes a pair of lever members that move the thread toward the center, and a concave engagement that engages with the thread.
A part may be formed . With this configuration, it is possible to prevent the twill from coming off due to unstable tension.

[0005]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIGS. 1 and 2 show an automatic winder to which the winding method and apparatus according to the present invention are applied. The winding unit 11 of the automatic winder includes a traverse drum 2 for winding the yarn Y from a spinning bobbin (yarn supplying bobbin) 12 while appropriately traversing the yarn Y. The slab catcher 13 removes a yarn defect to a predetermined shape ( It is configured to form a package P having a (cone shape). The traverse drum 2 is a winding unit 1
The package P is supported by one frame 14 in a cantilever manner, and is rotationally driven by a drum motor 34 to rotate the package P by frictional contact. A groove 5 for traversing the yarn Y with a predetermined width A is formed on the peripheral surface of the traverse drum 2.
A cover 6 for preventing the yarn Y from jumping out of the groove 5 is provided on the front side. Below the traverse drum 2 (on the yarn traveling upstream side), a yarn regulating member 15 which is a feature of the present invention is provided.

The yarn regulating member 15 is a lever plate 1 which is a pair of swingable lever members arranged in the axial direction of the traverse drum 2.
A drive mechanism 18 for operating the lever plates 16 and 17 at a predetermined timing is provided. The lever plates 16 and 17 are supported by support brackets (not shown) attached to the frame 14 via longitudinal axes 19 and 20, and the leading end of the swing extends forward from the traverse drum 2. Engagement portions 21 and 22 are formed inside the extension portion so as to be appropriately engaged with the yarn Y. The engagement portions 21 and 22 with the thread Y substantially constitute the thread regulating member 15 which is a feature of the present invention. Also package P
The connecting rod 23 is hooked between the vicinity of the base end of the longitudinal axis 19 of one lever plate 16 located on the smaller diameter side and the vicinity of the distal end side of the longitudinal axis 20 of the other lever plate 17 located on the larger diameter side. Passed,
Both ends are supported by pins 24. That is, the swing of one lever plate 16 is transmitted to the other lever plate 17, and the tips of the levers approach or separate from each other. Note that, as shown in FIG.
Slant surfaces 32 and 33 having a U-shape in a plan view are formed on the tip side from the front and rear sides 1 and 22, so that the yarn can be engaged with the yarn deviated more forward than the yarn path at the time of normal winding. ing.

The drive mechanism 18 includes an air cylinder 25 connected to one lever plate 16, an electromagnetic valve 26 for supplying and discharging air for operation to the air cylinder 25, and an operation valve for appropriately operating the electromagnetic valve 26. And a control unit 27. The air cylinder 25 is provided in the axial direction of the traverse drum 2, and the distal end of the piston rod 28 is connected to the base end of one lever plate 16 via the vertical pin 30 of the connection fitting 29. That is, it expands when air is supplied,
The lever plates 16 and 17 are swung in the direction of approaching the distal end. As shown in FIG. 1, during normal winding, that is, when the yarn Y of the spinning bobbin 12 is wound on the package P, the engaging portions 21 and 22 of the lever plates 16 and 17 are provided. Is outside the predetermined traverse range A,
Alternatively, the traverse end is held so as to be in contact with the yarn Y ₁ at the traverse end so as not to hinder the traverse action by the traverse drum 2. When the traverse control becomes necessary, the air cylinder 25 is extended, so that the engaging portions 21 and 22 advance into the traverse range A as shown by the arrow S in the figure, and the yarn path Y ₂ To the center.

The traverse control by the lever plates 16 and 17 is performed at the time when the drum starts to rotate at the start of winding. That is, as shown in FIG. 3, when the yarn Y is wound on a new paper tube 3 or when knotting is completed and winding is restarted, the traverse drum 2 and the paper tube 3 are prevented from slipping. , Until the drum steady rotation r _O is reached
For example, although the slow start is performed with a rising period t _O of about 10 seconds, the winding tension of the yarn Y is considered to be low and unstable in the first stage. Accordingly, at this time, for example, at a time of about t ₁ = 6 to 7 seconds from the start of the drum, the control unit 27 which has input the start signal of the drum motor 34 outputs an operation signal to the electromagnetic valve 26 to operate the yarn regulating member 15. Thus, the tension can be increased by moving the yarn Y to the center, and the tension can be set to a predetermined tension that enables appropriate winding. This predetermined rise time t ₁
Has elapsed, the lever plates 16 and 17 are slowly opened to return outside the traverse range A, and the regulation is released.

As described above, the movable yarn regulating member 15 is provided so as to be movable from the outside of the traverse range A to the inside of the traverse range A, and is advanced into the traverse range A by the drive mechanism 18 at the start of winding. By moving the yarn Y in the transverse direction (center side), the tension can be appropriately increased, and it is possible to prevent detachment, loose winding, and scrambling. That is, occurrence of a defective package can be eliminated, and the quality of the package P can be improved. In addition, since the yarn regulating member 15 is driven at the start of rotation at the start of winding, the occurrence of a defective package due to low tension and instability at the time of slow start can be prevented. It is also possible to swing the lever plates 16 and 17 from the time of the notching to continuously perform the traverse control at the time of the rotation start. In this way, the position of the cut end yarn is regulated to the center side, so that the yarn pick-up means (suction mouth) at the time of splicing
Can easily pick up the upper thread (the thread of the package P), and the success rate of automatic splicing can be improved. Further, the lever plates 16 and 17 and the drive mechanism 18 thereof shown in this embodiment are used.
Since it has a simple structure, it can be easily provided in an existing automatic winder, and is extremely versatile.

Further, the yarn regulating member 15 may be used to prevent the end surface from dropping. It is considered that one cause of the end face drop is that the yarn Y is jumped up due to the sudden loss of high tension due to the cutting of the yarn Y. Therefore, in addition to the start of winding, when the yarn is cut by the slab catcher 13 and when the yarn supply 12y of the spinning bobbin 12 runs out,
Try to regulate traverse. In order to drive the lever plates 16 and 17 at this timing, a signal for detecting a yarn defect is input from the slab catcher 13 shown in FIG. 2 to the control unit 27 and before the cutter provided on the slab catcher 13 operates. Next, the electromagnetic valve 26 is switched to drive the air cylinder 25. If the cutter ON signal of the slab catcher 13 is delayed by, for example, 20 msec from the yarn defect detection signal, the operation of the electromagnetic valve 26 can be advanced, and the yarn speed is 1,300 m
Even at the time of / sec, the position about 50 cm from the slab detection position can be cut, so that there is no problem in removing the yarn defect. To operate when the yarn supply 12y runs out, for example, the operation of the balloon controller 28 shown in FIG. 1 is used. The balloon controller 28 regulates the balloon when the spinning bobbin 12 is unwound,
When the yarn supply 12y of the spinning bobbin 12 decreases, the yarn is moved downward to prevent the balloon length from becoming excessively long. Therefore, when the balloon controller 28 is located at the lowermost end,
If this is detected by a sensor or the like and the lever plates 16 and 17 are rocked when the detection signal is input to the control unit 27 or when a predetermined time has elapsed after receiving the signal, the yarn supply 12y is The traverse control can be performed immediately before disappearing. As another control for preventing the end surface from dropping, the gate filler 31 can be used. The gate filler 31 detects the presence or absence of a lower thread (yarn supply) at the time of thread breakage or thread cutting, and determines whether or not to perform a knotting operation.
When the unwinding is completed, almost no yarn is detected at the same time. Therefore, by inputting the signal indicating that there is no thread to the control unit 27, the lever plates 16 and 17 can be moved before the end thread jumps up.
Can be controlled to control the yarn. Note for the prevention of such end face drop, it is preferable to further advance to the center side than the yarn path Y ₃ set as easily position Shi fell end face. In addition, it is preferable that one lever plate 16 is configured such that the advance distance of the engagement portion 21 is larger than that of the other lever plate 17. This is to cope with the tendency that the peripheral surface of the cone-shaped package P is inclined downward toward the small-diameter side, so that the small-diameter side is liable to drop the end face.

In this embodiment, a pair of lever plates 16 and 17 are shown as the yarn regulating member 15, but any structure can be used as long as it can regulate the yarn and change the tension. Good. Further, the drive mechanism 18 is not limited to the air cylinder 25, and may be of any type as long as it operates the yarn regulating member 15 at a predetermined timing.

[0013]

As described above, according to the first and second aspects of the present invention, it is possible to prevent the twilling from occurring due to low and unstable tension and to improve the quality of the package. . Further, according to the third aspect of the invention, it is possible to prevent the occurrence of a defective package at an unstable time when the tension at the time of the slow start is low.
According to the invention of claim 4, the present invention can be easily applied to an existing automatic winder, and is extremely versatile.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of the present invention.

FIG. 2 is a plan view of a main part of FIG.

FIG. 3 is a change diagram of a drum speed for explaining the operation of FIG. 2;

FIG. 4 is a front view showing a main part of an automatic winder which is a conventional winding device.

[Explanation of symbols]

 2 traverse drum 15 yarn regulating member 16, 17 lever plate (lever member) 18 drive mechanism 27 control unit 34 drum motor P package A traverse range Y yarn

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁶ , DB name) B65H 54/00-54/48 B65H 59/00-59/40

Claims (4)

(57) [Claims] 1. A winding method for winding while appropriately traverses the yarn, during the winding start, observed when preparative normal winding
Traverse range where the yarn is centered more than the traverse range
After the specified rise time has passed,
A winding method characterized by removing regulations . 2. A winding device for winding a yarn while appropriately traversing the yarn, wherein the yarn regulating member is movable in and out of a traverse range, the yarn regulating member is advanced into the traverse range at the start of winding , and a predetermined rise is provided. Time passes
And a drive mechanism for returning to outside the traverse range after the rotation . 3. The winding device according to claim 2, wherein the drive mechanism drives the yarn regulating member at a rotation start timing of winding start. 4. A recess in which said thread regulating member engages with said thread on each of a pair of lever members which bring said thread to the center .
The winding device according to claim 2, wherein the winding device has an engagement portion .