JPS63264926A - Quality control of finished yarn - Google Patents

Abstract

PURPOSE:To carry out quality control of yarn preventing the generation of defective yarn caused by measurement operation, by measuring yarn quality with a quality measuring device nearly simultaneous to doffing in a winder and analyzing the data combining the measured value of a twisting zone with with that of an untwisting zone. CONSTITUTION:A yarn y of yarn-feeding side is sucked with a suction nozzle of a threading apparatus 27 in doffing operation. During the suction operation, the quality of the yarn Y is measured in measurement zones 58, 59 by a quality measuring device 60 at the tip end of an arm 47 and by a quality measuring device 60 at the tip end of an arm 61 of a quality measuring apparatus 46. The data 65 measured by the quality measuring devices 60, 60 are transmitted to a quality controlling apparatus 66 and analyzed to obtain individual quality control information of each winding package on each doffing operation.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for controlling the quality of processed yarn in a yarn false twisting machine.

[Conventional technology]

As shown in Fig. 13, the yarn false twisting machine passes filament yarn (Y) fed out from a yarn feeding package (Pl) of a creel stand (a), which is a yarn feeding device, to a first heater (b) and a yarn cooling plate (C). ), the false-twisting device (d), and the second heater (e) are sequentially turned on to perform the false-twisting process and wind the material onto the winding puff cage (P2) in the winding device (f).

Conventionally, in the yarn false twisting machine mentioned above, processing conditions such as yarn tension, thickness, number of twists, and yarn temperature are measured by dotting, which involves replacing a full package with an empty bobbin in the winding device of the yarn false twisting machine. Using a measuring device that manually measures each processing condition regardless of the doffing time and at a period considerably longer than the doffing time, the measurement area, that is, the yarn (Y), is tested by the false twisting device (d). This was carried out in the twisting section (58) before passing through the false twisting bag [(d)] and in the untwisting section (59) after passing through the false twisting bag [(d)] to control the quality of the yarn.

[Problem that the invention seeks to solve]

However, in the conventional method as described above, the false twisting device (d) is usually located at a higher position than the worker's height, so a work trolley (h) is required, making measurement laborious;
It is not easy to carry out measurements in the yarn 58) and the untwisting area (59) at the same time, and furthermore, it is impossible to instantaneously analyze and process the respective measurement results to judge the quality of the yarn.

In addition, since measurements especially in the twisted area (<58) affect the yarn processing process, if measurements were taken while the yarn was being wound into the winding package (P2), the winding package would have been discarded. . However, when measuring manually, the cycle between one measurement and the next measurement is often long, and if an abnormality occurs in the false-twisting device during this cycle, the multiple wound packages wound during that time may be considered defective. There was a problem. The present invention has been made in consideration of the above circumstances.

[Means for solving problems]

In order to solve the above-mentioned problems, the present invention uses a yarn quality measuring device in a yarn false twisting machine having a plurality of winding devices to check the twisting area and untwisting area almost simultaneously with dotting in the winding device. Yarn quality is measured, and the measured values of the twisting area and the untwisting area are combined and analyzed for yarn quality control.

[Example] Hereinafter, a preferred example of the method for quality control of processed yarn of the present invention will be described based on the accompanying drawings.

First, before explaining the present invention, let us first discuss a yarn false twisting machine having a plurality of winding devices, and the present applicant's patent application No. 60-22'74.
The doffing device for a yarn false-twisting machine proposed in No. 76 (Title of the invention: Method and device for doffing packages in a yarn false-twisting machine) will be explained with reference to FIG.

FIG. 1 shows a side view of the yarn false twister.

A long first heater (2) is placed on one side of the work space (1).
is set upright, and a plurality of thread winding devices (3) are provided on the other side. Further, a creel (4) supporting a large number of yarn feeding packages (Pl) is arranged on the back of the first heater (2).
A second heater (5) is installed at the back of the yarn winding device (3). Above the work space (1) is a yarn cooling plate (6).
, a yarn guide device (7), and a false twisting device (8) are arranged in this order, and further below the first heater (2) and the second heater (5).
There are feed rollers (9), (10) above and below, respectively.
(11) is provided.

The yarn (Y) pulled out from the yarn supply package (Pl) passes through the first feed roller (9), inside the first heater (2) from bottom to top, and is bent by guide pins (12) and (13). After that, the yarn runs diagonally downward along the yarn cooling plate (6), passes through the yarn guide device (7), and is introduced into the false twisting device (8).

The yarn (Y) coming out of the false twisting device (8) is attached to the guide pin (14)
After passing through the second feed roller (10) and descending inside the second heater (5), the thread passes through the third feed roller (11) and the thread guide (15) to the thread winding device (3).
and is wound up to form a wound package (P2).

The thread winding device (3) is arranged in three stages vertically and in four rows in the front-rear direction of the paper, for a total of 12 units, and includes a cradle arm (16) that supports a winding package (P2), and a cradle arm (16) that supports the winding package (P2).
The friction roller (17) and thread (Y
) and other members. (19) is a suction pipe provided below the yarn winding device (3), which communicates with a blower (not shown).

In the work space (1), in front of the first heater (2),
A flat peg stand (20) is arranged. The stand (20) has a roller (21) provided on its lower surface that slides on a rail (22) laid on the ground.
It is designed to be able to run in the front and back direction of the paper in FIG. 1, and is normally fixed at a position facing the thread winding device (3) by a stopper (not shown). In addition, on the surface of the stand (20) facing the thread winding device (3), there are 12 vegs (23) in three rows vertically and four rows in the longitudinal direction of the paper, spaced at equal intervals vertically and longitudinally. planted horizontally,
An empty bobbin (B) is inserted into each veg (23). Another rail (24) is laid on the ground between the peg stand (20) and the thread winding device (3), and the doffing cart (25) is moved forward and backward in the plane of the paper by rollers (26) on the rail (24). Drive in the direction.

Although the details are not shown, the doffing cart (25) cuts the yarn (Y) when the winding package (P2) in the yarn winding device (3) is fully wound, and the cradle arm (16).
), and at the same time remove the bobbin (B) from the Veg stand (20), attach the bobbin (B) to the cradle arm (16), and place the winding package (P2) onto the Veg (23). It is designed to be installed on the

Next, the yarn quality measuring device used in the embodiment of the present invention was installed at the fourth rl.
! This will be schematically explained with reference to FIGS.

The quality measuring device consists of a yarn tension measuring device (36), a yarn thickness measuring device (37), a yarn twist measuring device (38), or a yarn temperature measuring device (39). 36) (3
7) (38) (39) Conventionally known measuring instruments are used. Measurement examples using each are shown below.

First, in the case of measuring the tension of the thread, the three measuring instruments (41) protruding from the tip of the measuring instrument (36) are pushed lightly into the thread (Y) to measure the inductance, etc. within the measuring instrument (36). However, the tension of the thread (Y) can be measured.In the case of measuring the thickness of the thread, the thickness of the thread (Y) can be measured using the denier sensor (42) provided at the tip of the measuring device (37).

When measuring the number of twists in a yarn, the main disk (4
3) and the auxiliary disk (44) inside the measuring device (38), the number of twists of the yarn (Y) can be measured. To measure the temperature of the thread, use the balance head (
The temperature of the yarn (Y) can be measured by the thermal convection sensor located inside the yarn (Y). There is a mounting member (
71) is provided.

These measuring instruments (36) (37) (38) (39
) is the first arm part (47) of the quality measuring device (46) installed on the head of the doffing truck (25) using the mounting member (71)
) is appropriately provided at the tip, and furthermore, a measuring device (36) is provided at the second
It is provided at the tip of the arm portion (61). The quality measuring device (
46) has a first arm part (47) and a second arm part (
A slide frame (61) is installed along the vehicle width direction connecting the winding device (3) and the peg stand (20).
48) Slide bar to support reciprocating movement
(49) and the screw rod (51) are horizontally suspended. The slide frame (48) has a slide bar (49)
A guide body (not shown) is slidably attached to the screen and a nut body (50) is screwed onto the screenie rod (51). Both ends of the screenie rod (51) are rotatably supported via bearings (52). In addition, a pulley (53) is attached to one end of the screw rod (51) to rotate it, and the boo U (53) and the boo J (55) attached to the rotating shaft of the motor (M) Endless Bell) (56
) is wrapped around it. In addition, the slide frame (48
) is attached with a sensor (S) that detects the movement of the yarn so that it can be accurately positioned with respect to the traveling path of the yarn, and the first arm part (47) is used for measurement in the twisting area (58).
and a second arm (61) measuring in the untwisting area (59)
operation is ensured.

Next, the operation of this embodiment will be explained using FIGS. 1 to 3. First, when doffing, the cradle arm (
The thread (Y) is newly wound onto the empty bobbin (B) installed in step 16) using the threading device (27) shown in FIG. The thread hooking device (27) is provided on the doffing cart (25) so as to be vertically movable in order to thread the thread winding devices (3) in three upper and lower stages. The thread hooking device (27) includes a thread shifting guide (28) for shifting the thread (Y) when winding is completed, and a cutter for cutting the thread (Y) gathered by the thread shifting guide (28). (29) and a suction nozzle (3) that sucks the fed yarn after cutting.
0) and the upper and lower three stages of multi-yarn (Y) are distributed by moving the fed yarn sucked by the guide (31) and suction nozzle (30) to the yarn winding device (3) and threading it. It is equipped with a threading arm (32) for threading. This threading device (2
7), threading is carried out on the fully wound winding package (P2).
) of the thread (Y) with the thread guide (28).
) side, cut the thread (Y) (29)
Cut the yarn (Y) on the yarn feeding side using the suction nozzle (30
) to support suction. Next, attach the threading device (27) to the bobbin (
B) is moved up and down to the newly installed stage, and the thread take-up arm (32) moves the thread (Y) that is being sucked in by the suction nozzle (30) as shown in the figure to the thread winding device (3). Thread the thread.

This embodiment uses the suction nozzle (3) as shown in the third figure.
0) is used to measure the processed yarn while suctioning the yarn.
Even if the processed yarn is affected during measurement, there is no problem because it is not wound onto an empty bobbin (B). Quality measuring device f (46
), and a quality measuring device (60) appropriately provided at the tip of the first arm (47) housed in the second arm (
61) Since the quality measuring device (60) provided at the tip contacts the yarn (Y) in the measurement area (58) or (59), respectively, or does not contact it at a measurable position, the rotation of the motor (M) is Motor shaft boom! J (55) to endless bell)
(56), the screw rod (51) pulley (
53) to rotate the screw rod (51),
Under the action of the screwed nut body (50), the slide frame (48) slides along the slide bar (49) in the direction of the measurement area, and the first arm part (48) attached to the slide frame (48) 47) and the second arm section (61) move, and the quality measuring instruments (60) provided at the ends of the arm sections (47) and (61) perform measurements.

In addition, the arm parts (47) and (61) are moved to the quality measuring instruments (60) and (60) once after measuring the thread (T2) in the measurement area by the sliding mechanism (not shown) of the slide frame (48).
) from the thread (T2) and move it to the right on the paper in Figure 3,
The thread (Yl) is measured, and the thread (T3) is measured in the same manner.

Next, a route for transmitting the measurement data of the quality measuring devices (60) and (60) described above to the quality control device (66) will be explained. In this embodiment, in order to supply power to the drive section of the doffing truck (25) described above, the power supply line (63) and the power receiving arm (6
4) is provided. Using this power supply line, the measurement data (65) is transmitted to the quality control device (
66), and individual quality control information for each wound package is obtained for each dotting by analysis processing such as tension level and frequency intensity.

Note that as the transmission means, for example, radio transmission, transmission, a method of pulling a reeled cable, a method of storing the information in a storage device provided in the doffing truck until the end of the work, etc. may be used.

Measurement data (65) in the quality control device (66) above
The analysis process will be explained using FIGS. 8 to 12. In this example, one or more of the measured values of yarn tension, thickness, number of twists, and yarn temperature measured in the twisting area (58) and the results measured in the untwisting area (59) are used. For example, the 8th
As shown in Figure 9, the twisting area (58) and the untwisting area (
When the tension of the yarn is measured in 59), the twisting tension (T1) and the untwisting tension (T2) are obtained as a transfer function regarding the human force and output, that is, the Laplace transform of the human force f (t) is expressed as F (s ), output X(
Let the Laplace transform of t) be X (s), then the transfer function G
(s) is calculated by G (s) = X (s) /F (s). Furthermore, as shown in Figures 10 and 11, the horizontal axis shows the frequency (
f) When the strength (PW) is expressed on the vertical axis, a low level curve as shown in the graph in Figure 10 is obtained under normal conditions, but a high level curve as shown in the graph in Figure 11 is obtained when the twisting part is normally used. The curve becomes , and an abnormality can be confirmed.

In addition, as another combination, when the number of yarn twists is measured in the twisting area (58) and the yarn tension is measured in the untwisting area (59), the first
2 As shown in the figure, the number of twists (TIlI) is plotted on the horizontal axis and the untwisting tension (T2) is plotted on the vertical axis, and the number of twists (TV4) is expressed in a graph.
and untwisting tension (T2) are inversely proportional to each other and form a substantially straight line.

For example, if this is used as standard index data, an abnormality can be detected by whether or not they are on the same straight line during other measurements, or the number of twists of the yarn in the twisting area (58) is the same as the number of twists of the yarn in the untwisting area (59). By measuring the tension of the yarn, the number of twists can be evaluated, and quality control information such as the detection of abnormal yarns can be obtained. Furthermore, by combining a plurality of measurement targets in the measurement area, it is possible to perform a comprehensive comparative evaluation and improve stability during processing.

Next, in this embodiment, a quality control bag is installed in the doffing cart (25) as a means for cutting the thread when an abnormality is detected. f (6
6) An actuator (67) that operates when an abnormality is detected in the analysis results is provided, and a push button switch that sends a signal to the frame (68) on the thread winding device (3) side to operate the cutter (69) is provided. (70) is provided, and when an abnormality is detected, the actuator (67) is actuated, the push button switch (70) is pressed, the force hook (69) is actuated, and the thread is cut. As a result, winding of defective processed yarn is not started, the number of defective packages generated can be kept to a minimum, and reduction in machine efficiency due to interruption of winding of abnormal yarn can be minimized.

Note that the quality measuring device (60) of this embodiment is a quality measuring device (
The above-mentioned measuring instruments (36), (37), and (38) are provided as appropriate at the tips of the arm parts (47) and (61) of 46).
(39) is permanently installed, and the tension, thickness, number of twists,
The temperature of the yarn may be measured, or one arm may measure the twisting and untwisting zones.

Further, the measurement is not limited to the above four conditions, but even better quality control of the processed yarn can be achieved by measuring other processing conditions such as the processing speed of the thread.

〔Effect of the invention〕

As explained in detail above, in the quality control method of the present invention,
The quality of the yarn can be measured almost simultaneously in the twisting and untwisting zones, and comprehensive quality control is performed by combining the respective measured values and instantly analyzing them.

Furthermore, since the measurement is performed almost simultaneously with dotting, there is no problem even if the processed yarn is affected during the measurement, and individual quality control information can be obtained for each wound package, improving the quality of the wound package. can.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing an apparatus for carrying out the method of the present invention;
Figure 2 is a diagram illustrating threading to the unwinding device, Figure 3 is a schematic front view of the unwinding device explaining measurement with a quality measuring device, and Figures 4 to 7 are quality measuring methods. The figure showing the measuring device that performs this is a graph showing the relationship between frequency and strength in yarn tension measurement, Figure 12 is a graph showing the relationship between yarn twist number and untwisting tension, and Figure 13 explains a conventional measurement example. It is a diagram. (3) --- Winding device (46) --- Quality measuring device (58) --- Twisting zone (59) --- Untwisting zone (60) --- Quality measuring device (65) ---・Measurement data (66) - Quality control device Figure 3, Figure 4, Figure 6, Figure 5, Figure 7. Ward = Ajisho Mine\to・λuzu・1qgo）

Claims (1)

[Claims] In a yarn false twisting machine having a plurality of winding devices, the quality of the yarn is measured in the twisting zone and the untwisting zone using a yarn quality measuring device at approximately the same time as doffing in the winding device. A method for quality control of processed yarn, characterized in that the measured values and the measured values of the untwisting area are combined and analyzed to perform yarn quality control.