JP2873260B2 - Method and apparatus for forming a downward winding at a predetermined loop angle on a spindle axis of a ring spinning machine or a ring twisting machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to the range of 90 ° to 270 °.
And a ring spinning machine or a ring twisting machine for performing the method.

[0002]

2. Description of the Related Art A downward winding is for fastening a yarn end as a machine end before doffing. Upon removal of the yarn, the yarn is cut between the yarn and the lower winding. New
For spinning the start of a pipe thread, yarn end is still needs to be <br/> fastened below winding. However, it is necessary to install a new lower winding as soon as the new tubing is full. That is, the old lower winding needs to be removed.

On the other hand, reliable fastening of the yarn end during downward winding requires a winding angle several times 360 °, depending on various influence factors. On the other hand, it is difficult to reliably and timely remove the yarn wound several times from the delicate spindle area. A device for cleaning the spindle area with a knife or a fan has been used in a conventionally known ring spinning machine or ring twisting machine.
This has the undesirable consequence of not being able to perform a thorough cleaning and increasing maintenance costs.

[0004] As a device for fixing the yarn end in the downward winding, a spinning machine whose winding angle is specified in the range of 90 ° to 270 ° has been proposed. According to this structure, it becomes easy to remove the end of the yarn in the lower winding after the start of the spinning,
It has the advantage that no knife or fan is required. However, it is necessary to maintain the winding angle very accurately.

[0005] German Offenlegungsschrift 29 27 616 discloses a spin-stopping method in which substantially similar reserve winding and downward winding are carried out irrespective of the properties of the yarn and its production factors and while maintaining the winding angle at a certain value. Disclose. In said patent,
A sufficient constant wrap angle from 900 ° to 1260 ° can be ensured, so that the spinning machine can avoid special adjustment operations depending on the yarn. In this method, three necessary parameters are not changed. That is, the reference yarn supply speed at the start of the spinning stop is constant, the subsequent time-dependent change program of the speed during the spinning stop operation is constant, and the ring rail descending speed during the spinning stop operation is It is constant.

A disadvantage in this known technique despite various parameters are fixed, the winding angle becomes inaccurate, is that can be greater than 270 ° from the 90 ° is desirable winding angle. The driving of the ring rail cannot be controlled with sufficient accuracy without using hydraulic pressure or the like. However, the use of hydraulic pressure is out of the question from the viewpoint of avoiding oil loss due to the fall of fly waste and the accompanying contamination of the spinning machine.

[0007]

SUMMARY OF THE INVENTION The purpose of the present invention is particularly to
An object of the present invention is to provide a method capable of continuously performing lower winding with an winding angle of 0 ° to 270 ° with improved accuracy, and a ring spinning machine and a ring twisting machine for performing the method.

[0008]

SUMMARY OF THE INVENTION The method of the present invention is described in claim 1.
The device according to the present invention is solved by the structure described in the characterizing portion of claim 9. According to features of the present invention, to grasp Shinano continuous increase in winding angle through a yarn length sensed drawn from the work stage and the drafting device of the detected winding
Et al., It is possible to perform accurate stop control of the yarn supplied by Rukoto reduce the Isuzu one parameter other that the feed rate of the yarn from the drafting device after the lower winding start, depending on it
Thus, an accurate winding angle can be realized.

[0009] The preferred method embodiment claimed in claim 2 provides an intermediate step in which the yarn feed performed in the drafting device is at least slowed down in performing the predetermined winding steps, during which the spindle shaft speed is maintained. . This intermediate step is necessary to maintain ballooning until the yarn between the drafting device and the yarn runs in tension.
An extra thread portion is wound on the tube thread. As a result, the winding angle during downward winding is increased corresponding exactly to the yarn length drawn by the drafting device and defined by the feed speed.
Thus, the inaccuracies introduced by the thread parts accumulated or accumulating during ballooning do not occur, and the desired wrap angle can be obtained with very high precision.

[0010] Preferred embodiments are given by the features of the dependent claims.

[0011]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of the present invention; Figure 1 schematically shows a control method associated with the configuration of the spinning zone of the ring spinning machine 1, the machine base 2 of the spinning frame section, of the machine frame 2 arranged spinning units 3 and spinning unit 3 for corresponding features The drive control 4 is shown.

The spinning unit 3 has a draft device 5 having a front roller 6 driven by a motor 7, and the connection between the motor 7, the front roller 6, the middle roller and the back roller is shown for simplicity. Absent.
The spinning unit 3 further comprises a spindle 9 with a downwardly wound crown 10 and a gripping element 11, a bearing 8 for the spindle 9, a flanged ring 13 arranged on a ring rail 12, and a threader 14 running on the ring 13. It has a guide device and a balloon controller 15. The spindle 9 is connected to a motor 17 via a spindle tape 16.
It is connected to. A thread 18 having a bobbin 18 'is mounted on the spindle 9. The drive of the ring rail 12 is omitted to simplify the drawing.

[0013] The yarn 19 is wound from the draft device 5 through the balloon controller 15 and the traveler 14 to the tube yarn 18. The drive control device 4 has a data processing device 20. The data processing device 20 includes a spinning program memory 22 including a drive program for the motors 7 and 17 and a ring rail drive, and a timing device 21. The data processing device 20 supplies the yarn 19 from the draft device 5 at a supply speed v.
Data 22 ′, 22 ″, 2 for data relating to the position of the ring rail 12 and the spindle shaft speed.
2 ″ ′. The sensor 23 for the front roller 6 and the position sensor 24 for the ring rail 12 are connected to the data input line 2.
5 and 26, which are operatively connected to the data processing device 20, the data processing device 20 being connected to control lines 27, 28,
29, it is operatively connected to the motors 7, 17 and the ring rail drive source.

FIGS. 2A, 2B and 2C schematically show operating conditions during the lower winding step. In all graphs, the horizontal axis represents time (t), and the vertical axis represents FIG.
2 (A) shows the supply speed (v) of the yarn 19 coming from the draft device 5, FIG. 2 (B) shows the rotation speed (n) of the spindle shaft 9, and FIG. 2 (C) shows the position, ie, the height ( h).

Further, a broken line extending in the vertical direction corresponds to the time axis, HW is a reserve winding step, UW is a downward winding step,
LV indicates at least an intermediate step of the yarn supply at a reduced speed, and NL indicates a post-rotation step of the spindle shaft after the supply is stopped. During operation of the ring spinning machine 1, the spinning program recorded in the memory 22 is driven and controlled by the drive control device 4. Such a spinning program basically includes the respective parts of "spinning start operation", "actual spinning operation (winding around a cup)", and "spinning stop operation". "it is wound on side, consisting reserve winding and the lower winding.

The upper winding and during a particular "spun deactivated" is performed in previously rotational speed of the spindle shaft deceleration,
In reserve winding, the speed of the spindle shaft is further reduced. These deceleration is carried out in accordance with the spinning parameters, important is that carried out by keeping ballooning as yarn breakage does not occur regardless of changes in operating conditions. The lower winding step includes a draft device 5 as described later.
Through the intermediate phase of reducing the supply of yarn from the cop 18
As soon as a predetermined winding stage for the application is provided, it is introduced by the data processing device 20 and is terminated when the desired winding angle is obtained. Here, as shown in FIGS. 3A and 3B, the winding angle is a lower winding angle at which the lower winding is performed .
The winding angle of the yarn at the portion between the runn 10 and the gripping element 11 (the angle from the center axis of the spindle in which both ends of the yarn in contact with the peripheral surface of the spindle are viewed).

During the "spinning stop operation", the ring rail
Lowering toward the lower winding position UWS , the ring rail 12
As soon as it reaches height 0 (FIG. 2c),
Wherein the predetermined winding stage for input is Ru is started. Directly
Previously, the thread 19 has traveled above the area of the lower edge of the tube 18 'of the cup 18. The moment when the ring rail 12 reaches the height 0 is detected by the sensor 24 and input to the drive control device 4 via the data input line 26. Thus, an intermediate step of setting the speed at which the yarn 19 is supplied from the draft device 5 at a reduced speed (FIG. 2A) is set. That is, the setting of the intermediate process is performed by a command transmitted to the motor 7 via the control line 27. Since the spindle shaft 9 is still rotating (FIG. 2b) , it will bulge in an arc to maintain ballooning before reaching the intermediate step .
As a result, the yarn 19 having an extra length is continuously wound on the cup 18, and the yarn 19 between the stopped front roller 6 and the rotating cup 18 travels while being tensioned. Even if the intermediate process of supplying the yarn at a reduced speed at least after this state is continued for a while,
The drawn yarn 19 is twisted only, and does not give a disadvantageous result since an excessive tension load is basically not applied. It should be noted that the time for the intermediate step of supplying the decelerated (or possibly stopped) yarn is set so as to consume the extra length of the yarn portion of the ballooning.

[0018] (sometimes it ends up or stop) which decelerated by the intermediate step of performing a thread supply, ballooning
The excess length of yarn for forming is eliminated and the yarn 19 is tensioned, so that the yarn length delivered from the drafting device 5 is exactly equal to the yarn length continuously wound on the spindle shaft. It will correspond. Lower winding process starts after the intermediate step of performing reduction yarn feed, but reaches the lower winding position UWS continued to drop from the ring rail 12 is a height of zero, the draft device 5 i.e. to perform the supply of between yarns <br The draft roller 6 continues to operate (FIG. 2c). As a result, the lower winding becomes the lower winding crown 10 and the gripping element 11.
Formed on the open lower winding part formed between
It is.

The drive control unit 4 detects the length of the yarn pulled out after the intermediate stage of the supply of the reduced speed yarn by the time measuring device 21 and the speed sensor 22 of the front roller 6, and detects the required yarn length for the desired winding angle. Is draft device 5
As soon as the yarn is pulled out, the supply of the yarn is stopped. After the supply of the yarn is stopped, the yarn is tensioned between the draft device 5 and the spindle shaft 9 and an extra length necessary for ballooning is formed.
Since the thread portion has disappeared, a desired winding angle can be realized with high accuracy and desired reproducibility.

During the lower winding step, the drive control device 4 proportionally reduces the spindle shaft speed and the yarn supply speed, and the supply speed becomes extremely low before the yarn supply is stopped. It can help to make the stop accurately. When the supply is stopped, the front roller 6 is cut off by the drive control device via the motor 7, but the rotation of the spindle shaft is continued after a short time (FIG. 2B). In this way, the lower winding is carried out in tension on the spindle shaft, which facilitates the doffing and increases the twist so that the yarn section between the draft device 5 and the lower winding crown 10 is reduced. It can be reinforced to help break the yarn at the desired location, ie, at the end of the lower winding.

The data processor 20 provides the following operations to various operation control circuits. First, when the yarn supply speed and the spindle shaft speed decrease, the ring rail 12 is almost zero.
It can be done when it came to the height position, which allows the stopping accuracy and soft intermediate supply without causing yarn breakage. With a similar advantage, the yarn feed speed is reduced corresponding to the winding angle of the lower winding.

In a preferred embodiment, the yarn supply can be decelerated during the intermediate supply stop step only until the balloon has disappeared and is in tension. In another embodiment, the downward winding step can be introduced independently of the upward winding and the reserve winding. That is, the supply of the yarn is stopped .
The intermediate step may be I line between the upper winding is being performed.
In order to never alter and the value of the yarn length given in downward winding without forming a yarn reserve similar to ballooning during reserve winding, to perform the reserve winding is required at a given height You. Reserve winding at a predetermined height is performed using the data processor 20 by detecting ring rail motion and correspondingly controlling the yarn feed speed.

In a further embodiment, the control circuit for the set ring rail position is produced via a ring rail drive which can be controlled via a drive control 4.

[Brief description of the drawings]

FIG. 1 is a schematic front view of a ring spinning machine or a ring twisting machine having a structure according to the present invention, and a drive control device is shown in a block diagram.

FIG. 2 is a graph showing operating conditions before doffing. FIG. 2 (A) is a graph showing a time change of a yarn supply speed, and FIG. 2 (B) is a graph showing a time change of a rotation speed of a spindle shaft. FIG. 2C is a graph showing the change over time of the position of the ring rail.

FIG. 3 The figure explaining the position of a lower winding, and a predetermined winding angle
3A is a schematic front view, and FIG.
It is sectional drawing by line AA of (A).

[Explanation of symbols]

1 ... ring spinning machine 4 ... driving control apparatus 5 ... draft device 7, 17 ... motor 9 ... spindle 12 ... ring rail 18 ... cop 19 ... thread 20 ... data processing unit 21 ... memory Θ timekeeping device 22 ... spinning program ... Winding angle

Claims (14)

(57) [Claims] 1. Within a range of 90 ° to 270 ° on a spindle axis of a ring spinning machine or a ring twisting machine equipped with a yarn .
In the method of forming a downward winding of a predetermined winding angle of,
After a predetermined winding stage for the tube yarn (18), the length of the yarn (19) to be wound as a lower winding is detected and the 90 ° is detected .
As soon as the required length of the yarn for a given winding angle in the range from 270 ° to 270 ° is obtained, the subsequent supply of the yarn (19) is stopped by the supply stop means, whereby a precise stop control of the yarn supply is achieved. and a method of forming a lower winding, characterized in that to obtain an accurate winding angles. 2. The method according to claim 1, wherein at the start of a predetermined winding phase , the running supply of the yarn to be wound is at least temporarily reduced during an intermediate operation. 3. The method according to claim 1, wherein the rotation of the spindle (9) is maintained even after the supply of the yarn is stopped. 4. The winding step according to claim 1, wherein when the thread (19) is guided beyond the lower end of the tube (18 ') of the thread (18), a predetermined winding step is started. The method according to claim 1. 5. The spindle speed is continuously reduced by a predetermined deceleration value from a speed value selected according to the spun yarn (19) prior to the predetermined winding step. Item 5. The method according to Item 4. 6. The method according to claim 1 , wherein said predetermined winding step is provided during an upward winding process. 7. The method according to claim 6, wherein the reserve winding is performed at a predetermined height. 8. The method according to claim 1, wherein the detection of the length of the yarn is performed based on a supply speed (v) of the drafting device and a supply time (t), preferably by a pulse generated according to a rotation angle of the supply roller. A method according to any one of claims 1 to 7. 9. A draft device (5), a spindle shaft (9), a ring rail (12), a plurality of yarn guide devices (13, 14, 15) provided on the ring rail, and the draft device (5). 2. A tube according to claim 1, comprising a spinning or twisting device comprising at least one drive means (7, 17) for said spindle shaft (9) and a frame (2) for supporting said spinning or twisting device. A thread with a thread
A predetermined winding in the range of 90 ° to 270 ° on the spindle axis
Means (21, 23) for detecting the length of the treated yarn (19), means for detecting a predetermined winding stage in a ring spinning machine or a ring twisting machine that implements a method of forming an angled downward winding (24) and the respective means (21, 23, 2
And 4) a drive control device (4) coupled under operating conditions to said drive device, said control device (4) being a start-up and a draft device (5) of a spindle shaft drive (17).
A ring spinning machine or a ring twisting machine, characterized by comprising a device (20) for controlling the feed speed of the ring. 10. A device according to claim 9, wherein the means for detecting the yarn length comprises a time-measuring device (21) and a sensor (23) for the supply speed of the yarn drawn from the draft device (5). Ring spinning machine or ring twisting machine. 11. Ring spinning machine or ring twisting machine according to claim 10, wherein said sensor (23) is formed as a speed sensor for the front roller (6), in particular a rotation angle sensor. 12. Means for detecting a predetermined winding stage comprises a sensor (24) for the position of the ring rail (12), preferably with its own drive controllable by a drive control (4). The ring spinning machine or the ring twisting machine according to any one of claims 9 to 11, comprising: 13. A ring spinning machine or a ring twisting machine according to claim 9, wherein said drive control device (4) has a device for controlling a draft device (5). 14. The drive control device (4)
A timer (21), a memory (22, 22 ', 22) for storing a spinning program to be executed and for storing data for each sensor (23, 24) relating to a feed speed (v) and a position of a ring rail; ''), Data processing device (2
0), and control lines (27, 28, 2) leading to the drive (7, 17) and the ring rail drive.
The ring spinning machine or the ring twisting machine according to any one of claims 9 to 13, further comprising (9).