JPH06191723A - Driving control method of yarn winding machine - Google Patents

Abstract

PURPOSE:To prevent the fluctuation of tension during the switching operation by placing a contact roller in a non-contact position relative to a bobbin immediately after the switching from a full-wound bobbin to an empty bobbin, and rotating the contact roller in an abutting manner on the yarn layer at the specified speed after the yarn layer of the specified size is formed. CONSTITUTION:In a winding machine, the yarn to be supplied through a traverse device 3 is wound around a bobbin 30 in a condition where a contact roller 4 (hereafter referred to as 'roller') is pressed against the bobbin which is inserted into a spindle 2 to be pivotably supported by a frame 1. The bearing pressure of the roller 4 to the bobbin 30 is provided by a bearing pressure providing mechanism 5, and the roller 4 is supported to the specified position by a supporting mechanism 6. When the yarn is switched from a fully wound bobbin to an empty bobbin, the roller 4 is separated from the bobbin 30 immediately after the yarn is switched while the roller 4 is abutted on the yarn layer on the bobbin 30 when the yarn layer of the specified amount is formed. The rotational speed of the roller 4 is controlled to be larger than the surface speed of the empty bobbin until the yarn is switched to the empty bobbin side.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drive control method for a spindle drive type winder that winds a yarn at a high speed of 4000 m / min or more.

[0002]

2. Description of the Related Art Generally, when winding a yarn spun from a spinning machine, a bobbin mounting spindle rotatably attached to a machine frame and a spindle located above the spindle and perpendicular to the machine frame There is used a winder including a traverse device mounted so as to move up and down in a direction, and a contact roller that abuts a bobbin inserted into a spindle to apply a predetermined surface pressure.

When the winding speed is 6000 m / min or more, the contact roller prevents the surface of the bobbin from being scratched and damaged, and the package shape is improved even at 4000 m / min to 6000 m / min. Therefore, the spindle and the contact roller are positively rotated by a driving device.

When switching from the full bobbin to the empty bobbin while rotating at such a high speed, the speed of the full bobbin is slightly increased at the time of the yarn switching operation to increase the winding tension to form the bobbin. It has been attempted to increase the force of the yarn to be caught in the formed yarn catching groove and to stabilize the yarn tension to prevent the yarn from being wound around the godet roll on the upstream side of the winder.

However, when the contact roller is driven at a constant speed, the yarn on the upstream side of the winding machine is wound on the full bobbin after coming into contact with the contact roller. When the amount is small, the yarn tension on the upstream side of the winder does not become high, and the yarn is wound around the godet roller due to the tension drop during yarn switching, and the yarn switching operation fails, and the speed increase amount of the full bobbin is large. The yarn tension between the contact roller and the full bobbin becomes extremely high, and when the yarn comes into contact with the bobbin, yarn breakage occurs and yarn switching fails. In addition, there is a problem that the yarn tension greatly changes during the yarn switching operation, and the characteristics of the yarn wound on the outermost layer change.

Further, the yarn wound on the bobbin in the yarn hooking operation or the yarn switching operation has a very thin yarn layer thickness. Therefore, when the contact roller comes into contact with the yarn layer on the bobbin in such a state, the yarn layer is struck and damaged by the contact roller, resulting in weaving spots in the knitting and weaving process and dyeing spots in the dyeing process.

Therefore, when the thread hooking operation or the thread switching operation is performed, the contact roller is brought into contact with the thread layer on the bobbin in a very thin state so that the thread is not hit by the contact roller. A gap is formed between the contact roller and the bobbin by providing a step or inserting a spacer at the end of the slide shaft supporting the contact roller.

Further, since the above-mentioned contact roller is positively rotated by the driving device and does not come into contact with the yarn layer during the yarn hooking operation or the yarn switching operation, and immediately thereafter, it is based on the rotation speed of the contact roller. Moreover, the rotation speed of the spindle for mounting the bobbin cannot be controlled. Therefore, the rotation speed of the spindle is controlled by feedforward control based on the winding diameter calculation until the contact roller comes into contact with the yarn layer, a predetermined amount of yarn layer is formed on the bobbin, and the yarn layer comes into contact with the contact roller. Then, when the rotation speed (number of rotations) changes, the change is detected and the spindle rotation speed control is changed from feedforward control to the preset winding speed based on the rotation speed of the contact roller. The feedback control is switched to control so that

In the method in which the contact roller as described above is supported at a predetermined position so that the thread layer comes into contact with the contact roller by the winding thickening of the thread, the thread is wound on the bobbin as shown in FIG. When the thread layer is formed on the bobbin, the thread layer on the bobbin starts to contact the contact roller (T
It takes a very long time from 1) to the time (T3) when the preset surface pressure (Pa) is reached.

Further, even when the yarn layer comes into contact with the contact roller, the surface pressure varies depending on the yarn quality, the yarn thickness, the yarn layer thickness, etc., and the rotation state of the contact roller also varies.

Therefore, it is not possible to accurately detect the timing of switching from the feedforward control to the feedback control, and the switching from the feedforward control to the feedback control does not reach the set surface pressure (Pa). The control may be switched to the feedback control, or the feedforward control may not be switched to the feedback control even after reaching a predetermined surface pressure (Pa).
There is a problem that accurate speed control cannot be performed, and the surface speeds of the yarn layer surface and the contact roller are deviated, which adversely affects the yarn layer.

[0012]

The first problem is that tension fluctuations occur during yarn switching operation, resulting in yarn breakage and failure in yarn switching, and uniform yarn distribution from the innermost layer to the outermost layer. The point is that a package having characteristics cannot be obtained.

A second problem is that it takes time to reach a predetermined surface pressure after the yarn layer on the bobbin comes into contact with the contact roller, and the timing at which the feedforward control is switched to the feedback control is accurately detected. The point is that you cannot.

[0014]

In order to solve the above-mentioned problems, a drive control method for a yarn winding machine according to the present invention is a spindle drive type having a contact roller which is positively driven as in claim 1. When winding the yarn with the take-up machine and switching from the full bobbin to the empty bobbin, position the contact roller so that it does not come into contact with the bobbin immediately after the yarn switching operation, and a predetermined amount of the yarn layer is formed on the bobbin. After that, at least one of the contact roller and the bobbin is moved in the direction in which the distance between the contact roller and the bobbin decreases.
The contact roller is brought into contact with the thread layer on the bobbin with a predetermined surface pressure, and the rotation speed of the contact roller is higher than the surface speed of the empty bobbin until the thread is switched to the empty bobbin side. The surface speed of the fully wound bobbin is controlled to be substantially the same as or slower than that of the full bobbin, and the surface speed of the empty bobbin after the yarn is switched to the empty bobbin is controlled to be substantially the same.

Further, when the yarn is wound by the spindle drive type winder having the contact roller which is positively driven, the contact is made immediately after the yarn hooking operation or immediately after the yarn switching operation. The roller is positioned so as not to contact the bobbin, and after a predetermined amount of thread layer is formed on the bobbin, the contact roller or at least one of the bobbins is moved in a direction in which the distance between the contact roller and the bobbin decreases. When the contact roller is brought into contact with the thread layer on the bobbin with a predetermined surface pressure, and when the contact roller comes into contact with the thread layer on the bobbin, the rotation speed of the spindle is controlled from the feedforward control based on the winding diameter calculation. Feedback control that controls the rotation speed of the spindle to a predetermined winding speed based on the rotation speed of the roller Preferably to replace.

[0016]

1 is a schematic overall view showing an embodiment of a winder for carrying out a drive control method of the present invention. The winder is rotatable in a horizontal state on a machine casing 1. The attached bobbin insertion spindle 2, the traverse device 3 which is located above the spindle 2 and which is attached so as to move up and down along the guide 1a formed on the machine frame 1, and the traverse device 3 The contact roller 4 rotatably attached to the lower portion, the contact pressure applying mechanism 5 for bringing the contact roller 4 into contact with the bobbin 30 inserted into the spindle 2 or the package with a predetermined contact pressure, and the contact roller 4. A support mechanism 6 that supports the contact roller 4 at a predetermined position.
7, a microcomputer having an input function for controlling the rotational speeds of the spindle 2 and the contact roller 4, the traverse speed of the traverse device 3, a memory function, a comparison calculation function, an operation command function, etc. And a yarn hooking mechanism (not shown) provided above the traverse device 3.

The above-mentioned spindle 2 and contact roller 4 are rotated by independent electric motors (not shown).

The traverse device 3 is located above the spindle 2 and the slider 9 which vertically engages with the guide 1a formed on the machine frame 1 and is parallel to the spindle 2. Frame 10 mounted on the slider 9, a traverse unit 11 mounted on the frame 10 so as to have a predetermined interval in the same direction as the longitudinal direction of the spindle 2, and a drive mechanism for the traverse unit 11 (not shown). It is composed of and.

The traverse unit 11 described above has a structure in which a plurality of blades are attached to a plurality of rotary shaft bodies, the blades are rotated together with the rotary shaft bodies, and the yarn reciprocates by the blades, or a rotary roller. A structure in which a traverse guide is engaged with a groove formed on the peripheral surface and the traverse guide is reciprocated in the longitudinal direction of the spindle 2 to traverse the yarn is used.

In the above-described surface pressure imparting mechanism 5, the head 12a is movably inserted into the air chamber 9a formed in the slider 9, and the lower end is attached to the machine frame 1 with the bracket 13 interposed. It has a piston 12, an electromagnetic switching valve 14a, and a pressure control valve (not shown), and is constituted by a compressed air supply pipe 14 connected to the air chamber 9a of the slider 9.

Instead of the cylinder mechanism composed of the air chamber 9a of the slider 9 and the piston 12, it is possible to use a commercially available compressed air cylinder.

When the high-pressure compressed air is supplied to the air chamber 9a, the contact roller 4 mounted on the frame body 10 together with the slider 9 rises, the surface pressure on the spindle 2 becomes small, and the low-pressure compressed air is supplied. Then, the surface pressure increases.

The support mechanism 6 is composed of a compressed air cylinder 15 attached to the slider 9 and a compressed air supply pipe 16 having an electromagnetic switching valve 16a.

At the time of threading operation or thread switching operation, compressed air is supplied to the compressed air cylinder 15 so that the piston rod 15a is projected and the slider 9 and the frame 1
0 is raised to form a predetermined gap between the contact roller 4 and the bobbin 30 attached to the spindle 2, and the thread hooking operation or thread switching operation is completed and the bobbin is detected by the timer or the winding diameter detection sensor. The controller 8 detects that a preset amount of yarn layer has been formed on 30.
When a compressed air supply stop signal is sent from the compressed air supply pipe 16 of the support mechanism 6 to the piston rod 1 of the compressed air cylinder 15.
5b is retracted and the contact roller 4 is brought into contact with the yarn layer on the bobbin 30. At the same time when the operation signal is sent to the compressed air supply pipe 16, or after a preset time has elapsed, the rotational speed control of the spindle 2 is performed, and the rotational speed of the spindle is changed from the feedforward control based on the rotational speed of the contact roller. Feedback control is performed to control the winding speed to a preset winding speed.

As the sensor 7 for detecting the rotation speed of the contact roller 4, a rotary encoder for detecting the rotation speed of the contact roller, or a pulse detector for detecting a gear attached to the contact roller or a hole is used. be able to.

Further, the contact roller 4 has a slightly larger diameter at the portion where the thread layer is not wound so that the thread layer does not come into direct contact with the bobbin 30 until a preset thread layer is formed. There is no need to form a step.

The drive control operation in the above-described winding machine will be described.

First, the winding speed, the traverse speed, the number of traverses, the winding surface pressure, the yarn winding amount, the yarn layer forming time and the like are input to the control device 8.

Next, the electromagnetic switching valve 1 of the compressed air supply pipe 16
6a is operated to switch the pipeline, and when compressed air of a predetermined pressure is supplied to the compressed air cylinder 15, the piston rod 15
b is projected and the frame 10 is lifted together with the slider 9,
A predetermined gap is formed between the contact roller 4 and the bobbin 30 attached to the spindle 2.

Further, the compressed air having a predetermined pressure is supplied to the compressed air supply pipe 1.
4 to the air chamber 9a of the slider 9 so that the contact roller 4 can be brought into contact with the bobbin 30 inserted into the spindle 2 at a preset surface pressure.

When these are ready and the spindle 2 and the contact roller 4 reach the preset yarn winding rotational speed based on the speed command signal from the controller 8, the yarn hooking mechanism (not shown) drives the yarn. Is wound around the bobbin 30 inserted into the spindle 2 and the yarn layer (winding thickness 0.1 to 0.
4 mm) is formed. At the same time when the yarn is wound around the bobbin 30, a winding diameter calculating means (not shown) provided in the control device 8 is operated, and the winding diameter is calculated from preset winding conditions and the rotation speed of the spindle 2. Then, when the winding diameter reaches a preset value, when the pipeline switching operation signal is sent from the control device 8 to the electromagnetic switching valve 16a of the compressed air supply tube 16 in the support mechanism 6, the pipeline is switched and compressed. Cylinder 1
The supply of compressed air to 5 is stopped. Then, when the piston rod 15a of the compressed air cylinder 15 is retracted, the frame body 10 is lowered together with the slider 9 and the contact roller 4 is brought into contact with the thread layer formed on the bobbin 30. By the operation, when the contact roller 4 starts contacting the yarn layer on the bobbin 30 (T1), a preset surface pressure (P
It can be seen that the time (T2) to reach a) is almost instantaneous as shown in FIG.

At the same time as the operation command signal is sent to the compressed air supply pipe 16 of the support mechanism 6 described above, or after a preset time has elapsed, the spindle 2 is set in the controller 8.
The rotation speed control is switched from the feedforward control based on the winding diameter calculation to the feedback control for controlling the rotation speed of the spindle 2 based on the rotation speed of the contact roller 4 to the preset winding speed.

Then, when the rotation speed of the contact roller 4 detected by the sensor 7 is sent to the control device 8, the spindle 2 is adjusted so as to reach a preset winding speed.
The rotation speed of is controlled by feedback.

As described above, when the yarn hooking operation is completed, the winding diameter calculating means (not shown) is actuated to calculate the yarn layer formation amount, and when the calculated value reaches a preset value, the support mechanism 6 The compressed air cylinder 15 is operated to forcibly bring the contact roller 4 into contact with the yarn layer formed on the bobbin 30, and the rotation speed control of the spindle 2 is switched from the feedforward control to the feedback control. Therefore, the switching timing of the rotational speed control of the spindle 2 can be made constant, and the rotational speed control of the spindle 2 can be switched while the contact roller is in contact with the yarn layer on the bobbin at a preset surface pressure. Since the operation is performed, accurate speed control can be performed.

When a yarn is wound by a turret type winder in which a plurality of spindles are rotatably mounted on a turret member instead of the above-mentioned winder, a yarn hooking mechanism (not shown) is used. At the end of the thread hooking operation, or at the end of the switching operation from the fully wound bobbin to the empty bobbin by the thread switching mechanism (not shown), the winding diameter calculation means (not shown) etc. operates and the thread layer formation amount is increased. Calculated and contact roller 4
Is forcibly brought into contact with the yarn layer formed on the bobbin 30, and the rotation speed of the contact roller 4 is faster than the surface speed of the empty bobbin until the yarn is switched to the empty bobbin side.
After the surface speed of the full bobbin is controlled to be approximately the same as or slightly slower than that of the full bobbin, the empty bobbin 30 after the yarn is switched to the empty bobbin
If the surface speed of the yarn layer formed above is controlled to be approximately the same, tension fluctuation does not occur during yarn switching operation, yarn breakage occurs, and the yarn is not wound around the contact roller. Can be switched to an empty bobbin. Further, by performing the above-mentioned contact roller speed switching timing at least before the yarn starts traversing, it is possible to wind the yarn whose yarn characteristics do not change from the innermost layer portion to the outermost layer portion.

[0036]

According to the drive control method of the yarn winding machine of the present invention, as described in claim 1, the yarn is wound by the spindle drive type winding machine having the contact roller which is positively driven, When switching from the winding bobbin to the empty bobbin, position the contact roller so that it does not come into contact with the bobbin immediately after the thread switching operation, and after forming a predetermined amount of thread layer on the bobbin, at least one of the contact roller and the bobbin is , The contact roller and the bobbin are moved in a direction in which the distance between the contact roller and the bobbin is reduced so that the contact roller is brought into contact with the thread layer on the bobbin with a predetermined surface pressure, and the rotation speed of the contact roller is adjusted to Until the bobbin is switched to the bobbin side, the surface speed of the empty bobbin is controlled to be faster than the surface speed of the fully wound bobbin or slower than that of the fully wound bobbin, and the yarn is switched to the empty bobbin. Because it has to allowed to control so as to be substantially the same as the surface speed of the rear empty bobbin side, without causing undue tension variation during the yarn switching operation, enabling stable yarn switching. Further, by changing the speed of the contact roller at least before the yarn starts traversing, it is possible to obtain a package having uniform characteristics from the innermost layer to the outermost layer.

Further, when the yarn is wound by the spindle drive type winder having the contact roller which is positively driven as in claim 2, the contact roller is provided immediately after the yarn hooking operation or immediately after the yarn switching operation. Position so that it does not contact the bobbin, and after a predetermined amount of thread layer is formed on the bobbin, move at least one of the contact roller and the bobbin in the direction in which the distance between the contact roller and the bobbin decreases, and When the roller is brought into contact with the thread layer on the bobbin with a predetermined surface pressure, and when the contact roller comes into contact with the thread layer on the bobbin, the rotation speed of the spindle is controlled from the feedforward control based on the winding diameter calculation to the contact roller. The feedback control that controls the rotation speed of the spindle to the predetermined winding speed based on the rotation speed of With this configuration, the spindle rotation speed control switching operation is performed while the contact roller is in contact with the thread layer on the bobbin at a preset surface pressure, so the spindle rotation speed control switching timing is constant. In addition to being able to do so, accurate speed control can be performed.

[Brief description of drawings]

FIG. 1 is a schematic overall view showing an embodiment of a winding machine for carrying out a drive control method of the present invention.

FIG. 2 is a schematic view showing a state of surface pressure when a contact roller in the winding machine of the present invention is brought into contact with a yarn layer on a bobbin.

FIG. 3 is a schematic view showing a state of surface pressure when a contact roller in a conventional winding machine is brought into contact with a yarn layer on a bobbin.

[Explanation of symbols]

 1 Machine Frame 2 Spindle 3 Traverse Device 4 Contact Roller 5 Contact Pressure Applying Mechanism 6 Support Mechanism 7 Sensor 8 Control Device 9 Slider 10 Frame 11 Traverse Unit 12 Piston 13 Bracket 14, 16 Pneumatic Air Supply Pipe 15 Pneumatic Cylinder 1a Guide 9a Air Chamber 12a Head 15a Piston rod

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[Procedure amendment]

[Submission date] December 3, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be amended] Claims

[Correction method] Change

[Correction content]

[Claims]

Claims (2)

[Claims] 1. When a yarn is wound by a spindle drive type winder having a contact roller which is positively driven and a full bobbin is switched to an empty bobbin, the contact roller is moved to the bobbin immediately after the yarn switching operation. Place the contact roller so that it does not come in contact with the bobbin, and after a predetermined amount of thread layer is formed on the bobbin, move at least one of the contact roller and the bobbin in the direction in which the distance between the contact roller and the bobbin decreases, and the contact roller The upper surface of the bobbin is made to contact the upper thread layer with a predetermined surface pressure, and the rotation speed of the contact roller is higher than the surface speed of the empty bobbin until the yarn is switched to the empty bobbin side. Control so that it is approximately the same as or slower than the surface speed, and after the yarn is switched to the empty bobbin, control so that it is approximately the same as the surface speed on the empty bobbin side. A drive control method for a yarn winding machine, characterized in that 2. The contact roller does not come into contact with the bobbin immediately after the thread hooking operation or immediately after the thread switching operation when the yarn is wound by a spindle drive type winder having a contact roller which is positively driven. Located in the
After a predetermined amount of the thread layer is formed on the bobbin, at least one of the contact roller and the bobbin is moved in the direction in which the distance between the contact roller and the bobbin is reduced, and the contact roller is moved to the predetermined thread layer on the bobbin. When the contact roller is brought into contact with the yarn layer on the bobbin while being brought into contact with the surface pressure, the spindle rotation speed is controlled from the feedforward control based on the winding diameter calculation to the spindle rotation speed based on the contact roller rotation speed. A method for controlling the drive of a yarn winding machine, characterized in that feedback control is performed to control the winding speed to a predetermined winding speed.