JPH0578028A - Unreeling auxiliary device and its control method - Google Patents

Abstract

PURPOSE:To provide the control method of an unreeling auxiliary device which can respond also to a half-ball bobbin. CONSTITUTION:This is a control method of an unreeling auxiliary device made by providing a balloon regulating member 32 which has an inner regulator to cover a feeder bobbin 4, and transfers from a shunting position to a specific position to follow the untying, in which the position of a chase 4a is recognized according to the bobbin form fed by a sensor 33 and the like, and the balloon regulating member 31 is to be transferred to a position recognized by a cylinder 38 and the like.

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. And a control method therefor, and more particularly, to an unwinding assist device and a control method therefor.

[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 tenser 7 is sucked by the relay pipe 17. In the bobbin change, the yarn blown up from the yarn supplying bobbin and discharged is sucked into the relay pipe 17. Next, when the suction mouth 16 and the relay pipe 17, which have sucked the yarn end on the winding package side and the yarn end on the yarn supplying bobbin side, turn in opposite directions and return to the position shown in the drawing, the yarn 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, 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 the defective portion of the slab from the yarn unwound from the yarn supplying bobbin and performing the splicing for each yarn supplying bobbin. Since the package is formed, its productivity greatly depends on the winding speed. However, in the conventional automatic winder, the practical winding speed is 10
It was around 00 m / min. The reason is (a) below.
This is because the winding speed is limited by the combination of the phenomena (c) to (c). (A) The unwinding tension increases as the winding speed increases. Especially, the remaining unwinding amount called the third ball is 1
The unwinding tension sharply increases from the time point of / 3, but if the degree of this increase increases, the yarn breaks due to the tension. (B) Sluffing increases as the winding speed increases. This sluffing is a state in which a plurality of coils are 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. 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 became longer, and the function of the balloon breaker 6 tended to deteriorate. Therefore, there is also proposed an unwinding assisting device in which the balloon breaker 6 is formed into a cylinder and is gradually lowered following the unwinding of the yarn supplying bobbin.

[0008]

However, as shown in FIG. 5, the yarn supplying bobbin supplied to the winding unit 1 is not always a predetermined constant shape, and is incomplete at a rate of several percent. A wound shape (sometimes called a semi-cylindrical bobbin) may be mixed. In this half-bobbin 4 ″,
The initial operating position of the balloon breaker 6 is located below the normal position. In this way, when the balloon breaker 6 is lowered following the unwinding, if the semi-lens bobbin 4 ″ is mixed, the starting operating position of the balloon breaker 6 is not determined, which is why the unwinding assisting device is practically used. There was a problem that it could not be used.

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 assisting device and a control method therefor capable of coping with a semi-cylindrical bobbin. It is what

[0010]

In order to achieve the above object, a control method of an unwinding assisting device according to the present invention has an inner diameter restricting portion which covers a yarn feeding bobbin and which follows an unwinding operation from a retracted position. A method of controlling an unwinding assisting device, comprising a balloon regulating member that moves to a position, wherein the position of a chess portion is recognized according to the shape of a bobbin supplied, and the balloon restricting member is moved to the recognized position. That's how it was done. Further, as the unwinding assisting device, there is an unwinding assisting device having an inner diameter restricting portion that covers the yarn supplying bobbin, and a balloon restricting member that moves from a retracted position to a predetermined position following unwinding, Some have means for recognizing the position of the chess portion according to the shape of the supplied bobbin, and means for moving the balloon restricting member to the recognized position.

[0011]

When the position of the chess portion is recognized according to the shape of the supplied bobbin and the balloon restricting member is moved to the recognized position, the operating position of the balloon restricting member is automatically determined even with a half ball.

[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 used in the method 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 regulates the yarn path, and a balloon (upper balloon) extending from the tubular body 31 to the guide plate 10 is formed.
It prevents the large fluctuation of the yarn and narrows 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, a method of controlling the unwinding assisting device by the sensor 33, the cylinder 38, and the controller 40 as a follower mechanism will be described below. Until the sensor 33 attached to the second arm 31b of the tubular body 31 detects the chess portion 4a of the semi-cylindrical bobbin 4 ″, the controller 40 that receives the input of the sensor 33 operates the switching valve 39 and the piston rod of the cylinder 38. When the sensor 33 detects the chess portion 4a, the cylinder body 31 stops at the operating position where the distance between the cylinder body 31 and the chess portion 4a is L1, which is substantially constant.
Then, the ON / OFF of the sensor 33 causes the cylindrical body 31 to gradually descend while following the unwinding. That is, if a sensor that detects the chess portion 4a is used, it is possible to easily perform control that is compatible with a semi-cylindrical bobbin. A diffuse reflection sensor is used as the sensor 33. As a typical example,
A light source consisting of an LED and a detector consisting of a phototransistor or a photodiode are arranged crossing or parallel to each other,
In some detectors, light emitted from a light source is diffused and reflected by an object to be detected and is detected by a detector. As shown, the chess part 4a
As the unwinding proceeds, the distance from the sensor 33 to the chess portion 4a increases, and the sensor 33 eventually outputs 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 switching valve 3
The piston rod 38 a of the cylinder 38 is stopped via 9. By repeating this, the cylindrical body 31 descends sequentially with the unwinding. The sensor 33 that monitors the chess part 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.

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, even with the semi-cylindrical bobbin 4 ″, the distance from the chess portion 4a is lowered to the operating state of L1. FIG. Both the tubular body 31 and the tubular body 32 with a diaphragm descend, and the diaphragm 32a is in a predetermined position.
Is gradually lowered so as to follow the unwinding of the chess portion 4a, the unwinding angle θ of the yarn unwound from the chess portion 4a is kept large, and the yarn remaining on the yarn feeding bobbin and the unwound yarn are unwound. As a result of less rubbing, the occurrence of sluffing and fluff is suppressed. FIG. 2 (c) shows a state of the three-divided ball in which the unwinding is further advanced, only the tubular body 31 descends, the tubular body 32 with a diaphragm remains stopped, and the diaphragm 32a is directly above the core tube 4b. It is in place. In particular, the unwinding tension tends to increase sharply after the third ball, which is caused by a large balloon such as a chain double-dashed line appearing in the yarn unwound from below the chess portion 4a and from above the chess portion 4a. This is due to the alternating appearance of small balloons appearing in the unwound yarn. However, the presence of the diaphragm 32a restricts the upper balloon from the diaphragm 32a to the guide plate 10 to be small. Further, after the third coin, the shape of the chess portion 4a begins to gradually collapse, and even if the cylindrical body 31 is lowered further, 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 inner diameter restricting portion at the lower end of the tubular body 31 needs to descend sequentially in accordance with the unwinding from the beginning of unwinding to the third ball.
It is necessary for a to stop at a predetermined position directly above the core tube 4b from the third ball to the end of unwinding. In this way, the cylindrical body 31
Focusing on the difference in the necessity of the diaphragm 32a and the diaphragm 32a, the cylinder 31 as the lower balloon restricting member and the diaphragm 32a as the upper balloon restricting member are divided, and the operation points thereof are different.

FIG. 3 is a diagram showing an unwinding assisting device used in another control method. The difference from FIG. 1 is that a motor 42 and a screw shaft 43 are used instead of the sensor 33 and the cylinder 38, and the motor 42 is controlled by the controller 40 via the host computer 41.

In FIG. 3, the cylinder 31 is a controller 4
Based on the rotation control of the motor 42 by 0, the unrolling is followed and a constant distance L1 from the chess portion 4a is maintained. 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). The weight of the yarn of the yarn supplying bobbin is measured before entering the winding unit, and this weight data is automatically input (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. 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 yarn number of step # 1 and the weight of the yarn of step # 2 (step # 5). The time required for unwinding is calculated from this yarn length and the winding speed in step # 3 (step # 6). From the unwinding time and the core tube size in step # 4, the descending speed of the cylinder is calculated (step #
7).

By the way, when the semi-cylindrical bobbins are mixed, it is necessary to lower the operating position of the tubular body. However, the operating position of the cylindrical body cannot be determined only by the unwinding time described above. Therefore, in step # 8, the shape of the yarn supplying bobbin is recognized. For example, the sensor installed in the entrance of the supply conveyor detects the height of the chess part by a sensor with a transmission type photoelectric feeler arranged in a row, and the special chess balls have a chess part on a magnetic plate stretched on the tray. Write the height of. A magnetic plate reading device is provided in each winding unit. The operating position of the cylinder is determined based on the information from this reading device (step # 9).

Steps # 1 to 7 and step # 8 described above
~ 9 is the preparation stage. Then, when winding is started (step # 10), the tubular body descends from the retracted position to the operating position (first operating position determined from the core tube size and the information in step # 9) (step # 11). Then, the cylindrical body descends sequentially at the descending speed calculated in advance in step # 7 (step # 12).

By the way, the above-mentioned unwinding assisting device follows the unwinding by lowering the tubular body based on the unwinding time, but it is necessary 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. 3, 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 are 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 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, 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.

[0025]

The unwinding assisting device control method according to the present invention is a method in which the position of the chess portion is recognized according to the shape of the supplied bobbin and the balloon regulating member is moved to the recognized position. Further, the unwinding assisting device has a means for recognizing the position of the chess portion according to the shape of the supplied bobbin and a means for moving the balloon restricting member to the recognized position, and is a semi-ball. Also, since the operating position of the balloon restriction member is automatically determined,
It is also possible to use a half bobbin.

[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 perspective view of an unwinding assisting device in which another control method of the present invention is used.

FIG. 4 is a flow chart of another control method.

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.

[Explanation of symbols]

 30 Unwinding assisting device 31 Cylindrical body (lower balloon regulating member) 33 Sensor 41 Host computer

Claims (2)

[Claims] 1. An inner diameter regulating portion covering a yarn supplying bobbin,
A control method for an unwinding assisting device comprising a balloon regulating member that moves from a retracted position to a predetermined position following unwinding, wherein the position of a chess part is recognized according to the shape of a supplied bobbin and is recognized. Method for controlling the unwinding assisting device, wherein the balloon regulating member is moved to the open position. 2. An inner diameter regulating portion which covers the yarn supplying bobbin,
An unwinding assisting device comprising a balloon restricting member that moves from a retracted position to a predetermined position following unwinding, which is recognized as a means for recognizing the position of a chess portion according to the shape of a bobbin supplied. An unwinding assisting device having means for moving the balloon regulating member to the position.