JPS61254473A - Spindle driven winder - Google Patents

Abstract

PURPOSE:To prevent damage to weak fiber or hollow fiber during winding at a low speed and to fiber of a smaller denier during winding at a high speed by detecting the winding diameter of a package through light with no contact with the package or the fiber so as to control the peripheral velocity of the package in such a manner as a reach a predetermined value. CONSTITUTION:Light projected from a projector 1 is received by a receiver 4, and when the diameter of a package 3 is D mm, the number of bits of D/0.097 is sampled by a counter 5, and a winding diameter arithmetic circuit 6 calculates the winding diameter of the package 3 according to the sampling value, and a reference R for comparison in a comparator circuit 9 is calculated according to the obtained winding diameter and a value set in a velocity setter 7. On the other hand, a gear 15 is mounted to the shaft of a motor 13, and the number of teeth is detected by a pickup 14, and the number of teeth N is sampled by a counter 10. Then, the reference value R and the number of teeth N are compared with each other in the comparator circuit 9, and according to the difference between R and N, a PID arithmetic unit 11 is operated to control the output frequency of an inverter 12. Thus, as detection can be performed with no contact, there is no fear of damage to the wound fiber.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a spindle driven winder.

The yarn to be wound by the spindle-driven winding machine of the present invention is not particularly limited, but according to the present invention, it is particularly possible to use a weak yarn such as a pitch-based carbon fiber before firing or a pressed yarn such as a hollow fiber. This collapses the hollow hole, making it possible to wind up threads that are sensitive to shape damage without damaging them, and to wind up fine denier threads at high speeds without damaging them. Further, the present invention can be used in a range from low speed to high speed.

[Conventional technology]

2. Description of the Related Art A spindle-driven winding machine is known in which a bobbin holder equipped with a bobbin is driven by an electric motor to control the circumferential speed or tension of a package wound on the bobbin to a predetermined value.

[Problem that the invention seeks to solve]

Conventionally known spindle drive winders have the following problems.

In a spindle-driven winding machine that uses a contact roller to control the circumferential speed, the contact roller contacts the package, detects the number of rotations of the contact roller, and controls the number of rotations of the roller to a predetermined number of rotations. Since the package cage drives the contact roller at high speed, the frictional force of weak yarns and fine denier yarns causes thread quality irregularities in the yarns located at the edges of the package, and streaks occur when dyed after knitting and weaving. When winding hollow fibers, there is a problem in that the hollow holes are crushed by contact with the contact roller.

In addition, as the winding speed increases, weak yarns and fine denier yarns, even if they are not hollow yarns, have problems such as streaks and deformation of the yarn cross section due to the frictional force of the contact roller.

A tension-controlled spindle-driven winding machine, in which a tension detector is brought into contact with the yarn being wound, detects the tension of the yarn, and controls the winding tension to a predetermined value, has a winding speed of 4000 m/min or more, for example. When winding yarn at high speed, the yarn is strained by the tension detector, and as a result, fuzz, single yarn breakage, and elongation patterns occur in the yarn. Particularly when winding fine denier yarn, the occurrence of fuzz, single thread breakage, and elongation is noticeable.Furthermore, when controlling the rotation speed of the bobbin holder according to a pre-programmed pattern, it is difficult to actually Since the winding state of the winding is not fed back and the rotation is controlled only by the programmed value, it is difficult to accurately control the circumferential speed from the beginning of winding to the end of winding.

[Means for solving problems]

In the present invention, in a spindle-driven winding machine that controls the rotational speed of an electric motor connected to a bobbin holder on which a bobbin is attached so that the circumferential speed of a package wound on the bobbin reaches a predetermined value, A light emitter and a light receiver are installed so that at least a part of the light path leading to the package intersects with the package on the bobbin holder, and the light emitted from the light emitter is divided into minute dimensions in the radial direction of the package and is transmitted to the light receiver. A spindle drive winding machine that detects the winding diameter of the package from the detected signal, and controls the drive motor based on a value calculated from the calculated winding diameter and a preset winding speed. This solves the above-mentioned problems.

[Function] The present invention does not use members that come into contact with the yarn, such as contact rollers or tension detectors, and detects the winding diameter of the package using light without contacting the package or the yarn. The speed is controlled to a predetermined straightness. Therefore, since the detection can be performed in a non-contact state, the winding yarn can be wound without being damaged. In particular, low-speed winding of weak yarns such as pitch-based carbon fibers before firing, low-speed winding of hollow fibers, high-speed winding of fine denier yarns, etc.
It is possible to wind the yarn within a range of 10 minutes without sacrificing the quality of the yarn.

〔Example〕

The present invention will be explained in detail below.

FIG. 1 is a block diagram of one embodiment of the present invention.

In this embodiment, the light from the emitter is detected inside the receiver as light divided into minute dimensions in the radial direction of the package, and the portion of the light divided into minute dimensions that is blocked by the package is divided. Count the numbers.

The projector 1 uses general light such as halogen light or fluorescent lamp light, and is disposed opposite to the light receiver 4 with a bobbin holder 2 fitted with a bobbin 2' for winding a padder 93 interposed therebetween. The receiver 4 is a charge coupled device (COD).
), a large number of microscopic solid-state image sensor elements are arranged in parallel inside, and the light emitted from the projector 1 is divided into microscopic dimensions by the solid-state image sensor elements. and receive the light.

In addition, the emitter 1 and the receiver 4 are installed on the same side with respect to the bobbin holder 2, and a reflector is placed on the opposite side of the emitter 1 and the receiver 4, so that after the light emitted from the emitter 1 is reflected by the reflector, The light may be received by the light receiver 4.

The counter 5 detects the light receiver 4 corresponding to the part where the light is blocked.
The number of bits output from the solid-state image sensor element is counted. The winding diameter calculation circuit 6 calculates the winding diameter from the value counted by the counter 5.

In the embodiment shown in Fig. 1, the light incident on each solid-state image sensor forms an angle with respect to the optical axis, so the calculated value is not the winding diameter itself, but a coefficient corresponding to the winding diameter. It has become. The calculated value may be directly converted into a winding diameter corresponding to this count, or the count may be converted into a winding diameter during a calculation described later. In order to eliminate the need for such conversion, laser light, infrared rays, or other parallel light with strong straightness may be used.

The speed setting device 7 sets the circumferential speed of the outer periphery of the package.

The reference value calculator 8 calculates a reference value based on the value set by the speed setting device 7 and the output of the winding diameter calculation circuit 6.

A gear 15 is attached to the electric motor 13, and a pulse signal corresponding to the teeth of the gear 15 is detected by the electromagnetic pickup 14 to detect the rotational speed of the electric motor 41113. A counter 1o counts the number of pulses detected by the pulse pickup 14, and a comparator 9 compares the output of the reference value calculator 8 with the output of the counter 10.

The PID calculator 11 outputs the output from the comparator 9 (compared difference)
The inverter 12 is controlled by performing PID calculation (or only PI calculation is possible) based on the . That is, inverter 12
The output frequency is controlled by the output of the PD calculator 11 to drive the electric motor 13.

The electric motor 13 is an electric motor for driving the bobbin holder 2, and is an induction motor in this embodiment.

The illustrated embodiment is a spindle-driven winder for winding yarn into a burn shape at 4000 m/min to 10000 m/min.

electric! The bobbin 2' is attached to the bobbin holder 2 connected to 113.
is attached, and the package 3 is wound around the bobbin 2'.

In this embodiment, the receiver 4 has 2048 bits and a winding diameter of 200n.
It is set to be ua. i.e. 200/
204B-0,097mm/bit.

The light projected from the light projector 1 is received by the light receiver 4, and the number of bits of the portion blocked by the package 3 is outputted from the light receiver 4. That is, when the diameter of the package 3 is Dim, the counter 5 samples D/○, 097 bits.

Based on the value sampled by the counter 5, the winding diameter calculation circuit 6 calculates the winding diameter of the package 3. Based on the calculated winding diameter and the value set in the speed setting device 7, the comparison circuit calculates a reference value R for comparison.

On the other hand, a gear 15 is attached to the shaft of the electric motor 13,
The pickup 14 detects the number of teeth on the gear. The detected number of teeth N is (rotation speed n of electric motor 11113) x (
The number of teeth of the gear is T)-N, and this value is sampled by the counter 1o.

Next, the comparison circuit 9 compares the reference value R and the number of teeth N, and R
PID calculation is performed by PID calculation circuit 11 based on the difference between and N, and the output frequency of inverter 12 is controlled. Note that the sampling periods of counters 5 and 10 are determined by a clock (not shown).

Since the present invention uses light, detection errors may occur if the projector and receiver become dirty.

In order to prevent such detection failures, it is preferable to provide an air curtain to the emitter and receiver. Furthermore, in order to prevent malfunctions due to dirt or floating threads on the emitter/receiver, in the embodiment, if more than a predetermined number of bits are consecutive, and from the middle of all bits,
A protection circuit is provided that compares this with all bits or with what is counted from other intermediate bits, and only considers the difference to be normal if the difference is within a predetermined range.

In this embodiment, the diameter of the package is taken as the total number of bits of the light receiver, but the radius D/2 of the package may be taken as the total number of bits of the light receiver. In addition, although an induction motor was used as the electric motor in this embodiment, a synchronous motor was used and the calculation circuit 6
The set frequency of the inverter 12 may be calculated from the winding diameter calculated in the above and the output of the speed setting device 7. In this case, the synchronous motor 13 is synchronized with the frequency of the inverter 12, so the gear 15, pickup 14, counter 10
The comparison circuit consisting of the comparator 9 and the comparator 9 becomes unnecessary.

The control of this embodiment uses a microcomputer,
Arithmetic processing is performed digitally, but analog circuits can also be used.

A second embodiment of another spindle drive winder according to the present invention is described below.
This will be explained with reference to the figures.

In this embodiment, the light projector/receiver is integrally moved in the radial direction of the package, and the light projected onto the package is divided into minute dimensions over time by using light having a minute width.

A bobbin 2' is attached to a bobbin holder 2 connected to a synchronous motor 23 and driven by the synchronous motor 1-3, and a package 3 is wound onto the bobbin 2'. A light projector 1 and a light receiver 4 are integrally attached to an L-shaped holder 16. (In this embodiment, in order to improve accuracy, a laser beam is used as the light beam from the projector 1.) The female thread formed on the L-shaped holder 16 is screwed into the feed screw 17, and the feed screw 17 is stepped. It is connected to the motor 18. The stepping motor 18 is rotationally controlled by a control device 19 and rotates the feed screw 17 . The guide bar 20.20' guides the holder 16 in translation.

The II Ill device 19 of the stepping motor 18 is connected to the microcomputer 21 . The microcomputer 21 receives input from the speed setter 7 and the light receiver 4, and also receives input from the inverter 1 for driving the synchronous motor 13.
2 is output.

The light emitter 1 and the light receiver 4 attached to the holder 16 are moved in the X direction by the feed screw 17 by the rotation of the stepping motor 18 while holding the package 3 between them.

When the optical axis of the projector 1 is blocked by the package 3, the stepping motor 18 is rotated by the control device 19 in response to a command from the microcomputer 21, and the holder 16 is moved by a predetermined step amount Δn (in this embodiment, 4 steps are set). (corresponding to 0.05 m1n) in the X direction. The number of moving steps Δn is added to the number of steps no from a preset reference position (in this embodiment, the center of the bobbin holder 2) as the number of steps moved due to the thickening of the winding (n-no+Δn), and in this way, The package winding diameter is calculated from the number of steps n obtained. (
In this embodiment, the pitch of the feed screw 17 is set so that the winding diameter is 300 mm and the steps are 30,000 steps.

Also, when setting the reference position outside, instead of adding,
It will be subtracted. ) Next, from the winding diameter calculated in this way and the winding speed V set by the speed setting device 7, the microcomputer 2
1, the output frequency of the inverter 12 that drives the synchronous motor 23 is calculated.

In order to prevent the package 3 from swinging around during rotation and resulting in poor control, the above-mentioned emitter 1 and receiver 4 have two optical axes, A and B (in this embodiment, the optical axes interval is 0.0. 11 m), and one optical axis A is connected to the package 3.
The stepping motor 18 is configured to move in the X direction (rolling thickness direction) by a predetermined step amount Δn when the optical axis B is interrupted by the package 3 at all times. Even if the optical axis A repeats blocking and receiving due to the swinging of the package 3, when the optical axis B receives light, the command of the optical axis A is ignored and the holder 16
This is to prevent the object from moving too far in the X direction.

In addition, the optical axis B is set for a predetermined time (0.3 se
c) When the light is received over a period of time, the light is returned by a predetermined amount (1/2Δn in this embodiment) in the anti-X direction.

In this embodiment, the bobbin holder 2 is driven by the synchronous motor 23, but an induction motor may be used to detect the rotation of the bobbin holder 2 and perform control by comparing it with a value calculated by a microcomputer.

In this example, the optical axis was moved in the X direction by a stepping motor, but a servo motor was used to control the position so that the outer diameter of the package was between the two optical axes, and the servo motor or The winding diameter may be calculated using an encoder connected to the holder 16.

Although two optical axes are used in this embodiment, the same control as described above may be performed by confirming that there is a shadow of the outer diameter of the package within a predetermined bit of the image sensor.

〔Effect of the invention〕

In the present invention, the winding diameter of the package is detected by light without using a member that comes into contact with the yarn, such as a contact roller or a tension detector, without contacting the package or the yarn, and the circumferential speed of the package is determined to a predetermined value. control so that Therefore, since the detection can be performed in a non-contact state, the winding yarn can be wound without being damaged. Especially in the range of several hundred m/min to 10,000 m/min, such as low-speed winding of weak yarns such as pitch-based carbon fibers before firing, hollow fibers, and high-speed winding of fine denier yarns, without compromising yarn quality. Can be rolled up.

[Brief explanation of drawings]

1 and 2 are block diagrams of different embodiments of the invention. 1... Floodlight, 2... Bobbin holder, 2
'...Bobbin, 3...Package, 4...
・Photoreceiver.

Claims (1)

[Claims] 1. In a spindle drive winding machine that controls the rotational speed of an electric motor connected to a bobbin holder on which a bobbin is attached so that the circumferential speed of the package wound on the bobbin reaches a predetermined value, a projector is provided. A light emitter and a light receiver are installed so that at least a part of the optical path from the light emitter to the light receiver intersects with the package on the bobbin holder, and the light emitted from the light emitter is divided into minute dimensions in the radial direction of the package. The winding diameter of the package is detected by a light receiver as light, the winding diameter of the package is calculated from the detection signal, and the drive motor is controlled by a value calculated from the winding diameter thus calculated and a preset winding speed. Spindle-driven winding machine. 2. The electric motor is an induction motor, the rotation speed of the electric motor is detected, a value calculated from the winding diameter and a preset winding speed is used as a reference value, and the difference between the reference value and the rotation speed of the electric motor is calculated. A spindle-driven winding machine according to claim 1, wherein the electric motor is controlled by PID calculation based on the PID calculation.