JPH0578015A - Control method for unreeling auxiliary device - Google Patents

Abstract

PURPOSE:To provide a control method for an unreeling auxiliary device which enables a lower balloon regulating member to follow unreeling smoothly. CONSTITUTION:In a control method for an unreeling auxiliary device provided with a lower balloon regulating member 31 which has an inside diameter regulating part for covering a yarn feed bobbin 4 and follows unreeling of the yarn feed bobbin 4. The lower balloon regulating member 31 follows unreeling based on unreeling time calculated by a host computer 41 in advance.

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. Relates to a control method for the unwinding assisting device.

[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.
Will be explained.

In FIG. 5, 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. Of the traverse drum 1 after passing through a disc or gate type tensor 7 for applying tension of the slab, a slab catcher 8 for detecting a defective portion of the yarn, and the like.
It is wound by the winding package 14 which rotates by 3.
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 supplying bobbins 4 are supplied to the winding position A of the winding unit 1 via the supply conveyor 11 and the rotating disc 19 while being inserted in the trays 18 which are independent from each other. 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 portion of the yarn supplying bobbin 4 so that the yarn Y 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. 6, the suction mouth 16 swivels in a direction, its suction port 16 a 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 1 is rotated by the reverse rotation of the reverse rotation roller or the drive motor in the machine frame 5.
3 The winding package 14 is reversed to loosen the yarn so that 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. For bobbin change, the yarn blown up from the yarn supplying bobbin is used in the relay pipe 1.
7 is sucked. 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 enters the yarn joining device 15. , Piecing 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. 5) and the turning operation of the eject lever (not shown), and 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 when the degree of this increase increases, yarn breakage due to the tension occurs. (B) Sluffing increases as the winding speed increases. This sluffing is the yarn feeding bobbin 4
The chess portion 4a is not unwound in a stable manner, and a state in which several coils are intertwined with each other like a loopout and unwound at a stretch is a cause of yarn breakage. (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. 5, 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, since the balloon breaker 6 is located from the lower side of the guide plate 10 to the upper side of the yarn supplying bobbin 4 and is fixed to the machine base 5, the unwinding of the yarn supplying bobbin 4 progresses and the yarn supplying bobbin 4 advances. The distance from the chess portion 4a of 4 to the lower end of the balloon breaker 6 gradually increases, and the function of the balloon breaker 6 deteriorates. As a result, yarn breakage may occur near the end of the unwinding of the yarn supplying bobbin 4.

As an unwinding assisting device for coping with such yarn breakage at the end of unwinding, a device disclosed in FIG. 7 has been proposed. A rotary screw shaft 22 is erected on the side of the yarn feeding bobbin 4 and the balloon breaker 6 in the winding position,
The rotary screw shaft 22 is rotated by a motor 23 such as a pulse motor fixed to the upper support plate 2a. A lift table 24 is screwed into the rotary screw shaft 22, and the rotary screw shaft 2 is inserted into a through hole 24 a formed in the lift table 24.
A guide shaft 25, which is erected in parallel with 2, is fitted.
With such a structure, the elevating table 24 moves up and down as the rotary screw shaft 22 rotates. Further, a balloon breaker 6 fitted from above the core tube 4b is attached to the lifting table 24. Further, a sensor mounting plate 26 is provided on the lifting table 24 so as to be vertically position adjustable, and the chess portion 4 of the yarn feeding bobbin 4 is mounted on the sensor mounting plate 26.
A sensor 27 such as a photoelectric sensor for detecting the upper end of a is provided, and the motor 23 is controlled by the signal of the sensor 27. That is, the balloon breaker 6
Sensor 2 so that it is at a predetermined position above chess part 4a.
7 drives the motor 23 to lower the lifting table 24.

In the unwinding assisting device 28 described above, the balloon breaker 6 descends following the unwinding of the yarn, and the distance L1 from the lower end of the balloon breaker 6 to the upper end of the chess portion 4a.
Maintains aptitude. Therefore, the lower balloon is maintained in a restricted state even near the end of winding.

[0010]

However, in the unwinding assisting device 28 of FIG. 7, the measurement of the upper end position of the chess portion 4a by the sensor 27 is inaccurate, and the balloon breaker 6 unwinds the yarn. It had a problem that it could not keep up.

The present invention has been made in view of the above problems of the prior art, and its object is to allow a balloon breaker as a lower balloon restricting member to smoothly follow the unwinding. It is intended to provide a control method of an unwinding assisting device.

[0012]

In order to achieve the above object, the control method of the unwinding assisting device according to the present invention has an inner diameter regulating portion which covers the yarn feeding bobbin and follows the unwinding of the yarn feeding bobbin. A control method of an unwinding assisting device comprising a lower balloon restricting member, wherein the lower balloon restricting member follows unwinding based on a previously calculated unwinding time.

[0013]

If the time required for the yarn feeding bobbin to be unwound is calculated in advance, the speed at which the inner diameter regulating portion of the lower balloon regulating member follows the unwinding is determined, and the inner diameter regulating portion and the chess portion of the yarn feeding bobbin are determined. The distance between and becomes almost constant.

[0014]

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 used in the control method 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 motor 38 as a following mechanism, a screw shaft 38a, and a screw shaft 38a. The controller 40 is a main member.

The cylinder 31 as the lower balloon regulating member is open at the top and bottom, and the lifting block 3 is provided on the side surface of the cylinder 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 screw shaft 3
It is screwed into 8a. The screw shaft 38a is connected to a motor 38 attached to the fixed block 36, and the cylinder 31 can be raised and lowered according to the rotation of the screw shaft 38a. The tubular body 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 fully fulfill the role of the cylindrical body 31 as described above,
Dimensions of the inner diameter regulating portion that is the lower end of the tubular body 31 and the yarn feeding bobbin 4
Is important because the inner diameter of the lower end of the cylindrical body 31 that controls the balloon of the yarn unwound from the chess portion 4a is smaller than the outer diameter of the yarn layer of the yarn supplying bobbin 4, and Must be larger than outer diameter.

The tubular body 32 with an aperture as the upper balloon regulating member is inserted around the outer periphery of the tubular 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 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. 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.

Next, 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, a lever 20 as a device for preventing the occurrence of the kink is provided in order to unwind the yarn which is likely to cause kink. 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. Lever 20 as this anti-rattle device
For the above operation, the tubular body 31 and the apertured tubular body 32 of the unwinding assisting device 30 are in the retracted position indicated by the solid line. 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 the position is reached and the occurrence of chattering is prevented.

Next, a yarn unwinding method by the above-described unwinding assisting device 30 will be described with reference to FIG. 2 (a)-
(D) is a figure which shows how the cylinder 31 and the cylinder 32 with a diaphragm follow unwinding. In FIG. 2A, 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. 2B 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. 2C 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 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. 2D, 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 second regulating member are divided, and the action points thereof are different. Is.

In FIG. 1, the above-mentioned cylindrical body 31 follows the unwinding based on the rotation control of the motor 38 by the controller 40, and keeps a constant distance L1 from the chess portion 4a. Therefore, the host computer 41 is connected to the controller 40, and the lowering speed of the tubular body 31 to be output by the controller 40 is determined. The procedure of the host computer 41 will be described with reference to FIG.
First, as a prerequisite, the yarn count of the yarn to be wound is input (step # 1). Further, the weight of the yarn of the yarn supplying bobbin is measured before entering the winding unit, for example,
This weight data is automatically entered (step #
2). Instead of the weight data, it is also possible to measure the thickness of the yarn layer with a sensor and input the yarn layer data. Also,
The winding speed pattern of the winding unit is also input (step # 3). Further, the size of the core tube of the yarn supplying bobbin supplied to the winding unit is also input (step # 4). Then, the yarn length of the yarn supplying bobbin is calculated from the count of step # 1 and the weight of the yarn of step # 2 (step # 5). The time required for unwinding is calculated from the yarn length and the winding speed of step # 3. (Step # 6). This unwinding time and step #
The descending speed of the cylinder is calculated from the core tube size of 4 (step # 7). The above steps # 1 to 7 are the preparation steps.
Then, when winding is started (step # 8), the tubular body descends from the retracted position to the operating position (the initial operating position determined by the core tube size) (step # 9). Then, the cylinder is sequentially lowered at the descending speed calculated in advance in step # 7 (step # 10).

By the way, the above-mentioned unwinding assisting device follows the unwinding by lowering the cylinder on the basis of the unwinding time, but it needs to be in the retracted position at the time of yarn splicing.
A movement independent of the normal sequential descent is required. Therefore, an efficient movement of the cylindrical body that does not reduce the winding efficiency will be described below. In FIG. 1, when the yarn traveling signal from the slab catcher 8 is turned off, a series of yarn splicing operations is started. Starting from the OFF of the yarn traveling signal, the tubular body 31 quickly rises to the retracted position of the solid line. That is, the series of yarn splicing operations and the raising of the tubular body 31 are performed in parallel.
Then, a series of yarn splicing operations (including operation of the lever 20)
Is done. 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 cylinder 31 descends, and when it contacts the chess portion 4a, the cylinder 31 stops. Then, the cylindrical body 31 is raised by a predetermined amount L1, and thereafter, the unwinding is followed at a predetermined lowering speed. In this way, the yarn traveling signal from the slab catcher 8 is turned off or on.
When the unwinding assisting device is actuated on the basis of, the movement of the cylindrical body 31 is not wasted.

Further, in the case of a thread which is unlikely to cause warp,
The lever 20 as the anti-rattle generation device is not operated. At this time, the tubular body 31 may be raised to the retracted position only when the bobbin is changed, and the lower thread of the yarn filler 9 detected in the first stage of the yarn splicing operation started by the yarn traveling signal of the slab catcher 8 is removed. The cylinder 31 can be raised to the retracted position based on the signal.

FIG. 4 shows another embodiment of the lower balloon regulating member and the upper balloon regulating member. In FIG. 4A, the lower balloon regulating member is a multistage open / close cylinder body 44a-4.
4 g are stacked with a gap ε. Figure 4
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. 4A 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. In this case, the gap ε may be zero, but in order to confirm the unwinding state of the yarn feeding bobbin, it is preferable to have a certain gap ε. The upper balloon regulating member is composed of the opening / closing lever 51. Figure 4
As shown in (b), the dog-legged levers 51a, 51
When b is closed by the drive member 52, a rhombus-shaped yarn path regulation space 53 is formed. The size of this space 53 is also the core tube 4b.
Make a space that fits within the outer diameter of the top of. 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. Also in this case, the opening / closing timings of the multistage opening / closing cylinders 44a to 44g and the opening / closing timings of the doglegged levers 51a and 51b can be controlled based on the unwinding time.

[0024]

The control method of the unwinding assisting device according to the present invention has an unwinding assist having an inner diameter restricting portion that covers the yarn supplying bobbin and a lower balloon restricting member that follows the unwinding of the yarn supplying bobbin. A method of controlling the device, wherein the lower balloon regulating member is allowed to follow the unwinding based on the unwinding time calculated in advance, and the time required for the yarn feeding bobbin to be unwound is calculated in advance. For example, the speed at which the inner diameter restricting part of the lower balloon restricting member follows the unwinding is determined, and the distance between the inner diameter restricting part and the chess part of the yarn feeding bobbin becomes substantially constant, so that the lower balloon restricting member can be smoothly unwound. Can follow Shu.

[Brief description of drawings]

FIG. 1 is a perspective view of an unwinding assisting device in which a control method of the present invention is used.

FIG. 2 is a diagram showing a yarn unwinding method by an unwinding assisting device.

FIG. 3 is a flowchart showing a control method of the present invention.

FIG. 4 is a view showing another embodiment of the lower balloon regulating member.

FIG. 5 is a device layout diagram of a winding unit.

FIG. 6 is a perspective view of a main part of the winding unit.

FIG. 7 is a diagram showing a control method of a conventional unwinding assisting device.

[Explanation of symbols]

 30 Unwinding assisting device 31 Cylindrical body (lower balloon regulating member) 41 Host computer

Claims (1)

[Claims] 1. An inner diameter regulating portion covering a yarn supplying bobbin,
A control method of an unwinding assisting device comprising a lower balloon regulating member that follows unwinding of a yarn supplying bobbin, wherein the lower balloon regulating member follows unwinding based on a pre-calculated unwinding time. A method for controlling an unwinding assisting device, comprising: