JPS63275720A - Method for stopping winding operation of open-end fine spinning frame and apparatus therefor - Google Patents

Abstract

PURPOSE:To stop the supply of silver to a spinning unit by detecting the lowering of yarn tension between a delivery roller and a winding drum caused by the stop of traversing motion according to a full-bobbin signal and to wind an end yarn on the surface of a package in the form of a ribbon. CONSTITUTION:A yarn Y is actively removed from a traversing mechanism during winding operation by a yarn-removing mechanism acting according to a full-bobbin signal. The lowering of yarn tension between a delivery roller and a winding drum caused by the stop of the traverse is detected to stop the feed of a sliver to a spinning unit. The yarn is wound on the top layer of a package P at a prescribed position R in the form of a ribbon to facilitate the detection of the yarn end.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention provides a method for interrupting winding and preparing for doffing when a package formed on an open-end spinning machine reaches a predetermined diameter. The present invention relates to a method for stopping a computer and a gW for implementing the same.

[Conventional technology and its problems]

Conventionally, in an oven-end spinning machine, yarn spun from a spinning unit is taken up by a winding drum to form a package, and when the package reaches a predetermined diameter, it is released from contact with the winding drum and winding is interrupted. For example, there is a method disclosed in Japanese Patent Application Laid-open No. 82572/1983. According to this, a stopping mechanism is constructed by providing a connecting member that rotates integrally with a cradle arm that supports a package, and connecting an operating member provided with a rack to this connecting member. Detection of a full tube is performed by the cradle pushing a limit switch notch provided near the base of the cradle arm, and this signal causes the supply of sliver to the spinning unit to be stopped. For this reason, the spun yarn gradually becomes thinner and breaks, and this yarn breakage is detected by a yarn breakage sensor.

This signal energizes the solenoid, causing the rack of the actuating member to engage the pinion, which is constantly rotating in a constant direction, and move it downward. As a result, the cradle arm connected to the actuating member also moves upwardly, separating the package from the winding drum and stopping winding of the yarn.

In this winding stop method, after the full sliver signal is issued, the sliver supply is first stopped to actively cause yarn breakage, and then the puff cage is separated from the winding drum, so that the sliver is not wound around the package. The sliver yarn is evenly distributed throughout the package due to the traversing during winding, and the yarn that is spun after the sliver supply is stopped gradually becomes thinner, making it difficult to find the end of the sliver.
There was a drawback that the next step, winding the thread onto the new bobbin, was time-consuming.

[Means for solving problems]

SUMMARY OF THE INVENTION The present invention aims to solve the above-mentioned problems of the prior art, and is aimed at ensuring that the yarn at the end of winding is located at a predetermined location on the pan cage so that the yarn end on the package can be easily and reliably found during doffing. , for example, to provide a method and apparatus for concentrating the winding on the central part.

That is, according to the first aspect of the present invention, the yarn spool of an open-end spinning machine forms a package by pulling out yarn spun from a spinning unit by a pull-out roller, taking it to a winding drum, and traversing it by a traversing mechanism. In the take-up device, the yarn being wound is separated from the traversing mechanism in response to a full package signal indicating that the package has reached a predetermined size, and the yarn between the take-out roller and the take-up drum caused by the stop of traverse is removed. A method for stopping winding in an open-end spinning machine is proposed, which is characterized by detecting a decrease in yarn tension and stopping the supply of sliver to a spinning unit.

According to this method, when the package reaches full capacity, the yarn being wound is first separated from the traverse mechanism by this signal, so that the traverse operation is stopped.

However, since the yarn is still being spun from the spinning unit, the yarn continues to be wound onto the package without being cut. The yarn pulled out is wound up at a fixed point, eliminating the path difference, so the tension of the spun yarn between the pulling roller and the winding drum is reduced.

A signal from a sensor detecting this tension drop causes the supply of sliver to the spinning unit to be stopped. As a result, the spun yarn gradually becomes thinner and is cut after some time.

Until this point, the yarn continues to be wound, but without traversing, the yarn is wound in a narrow band at a specific location on the package to clearly indicate the presence of the yarn end.

According to a second aspect of the present invention, as an apparatus for carrying out the above-mentioned method, the yarn spun from a spinning unit equipped with a sliver supply means is pulled out by a pull-out roller, taken up by a winding drum, and traversed. In the yarn winding device of an oven-end spinning machine which forms a package on a bobbin held by a cradle arm while traversing by a means, a first detection means is provided for detecting that the pan cage has reached a predetermined size. , providing a second detection means for detecting yarn tension between the pull-out roller and the winding drum, further receiving a signal from the first detection means,
An activation signal is issued to the yarn removing means provided on the optical path near the traversing means, and upon receiving the signal from the second detecting means, when the signal falls below a predetermined value, the sliver supplying means There is provided a winding stop device for an open-end spinning machine, characterized in that it is provided with a control means for issuing an activation signal for stopping the supply of sliver to the spinning machine.

Hereinafter, the present invention will be explained in more detail based on preferred embodiments shown in the drawings.

〔Example〕

As shown in FIG. 1, the yarn Y spun from the spinning unit 2 is pulled out upward by a pull-out roller 7 provided above the spinning unit 2, passes through a yarn guide 9 and a traversing re-guide 10, and then enters a cradle. The package P is wound up as a package P onto a bobbin 13 which is rotatably supported at the tip of an arm 11, is pressed against a winding drum 12, and is driven by the drum 12.

The cradle arm 11 is fixed to a mounting member 16 that is fixed to the casing 14 so as to be able to rotate integrally with respect to a rotation shaft 15 that is supported so as to extend parallel to the longitudinal direction of the machine base. As shown by the two-dot chain line in FIG. 1, the mounting member 16 is connected to a pressure mechanism 17 for adjusting the pressure force with which the package P supported by the cradle arm 11 is pressed against the winding drum 12. The pressure mechanism 17 rotates and urges the cradle arm 11 toward the winding drum 12 from the start of winding until the package P reaches a predetermined diameter by the action of a compression spring, and when the package diameter is larger than a predetermined value. If the cradle arm 11
The winding drum 12 is configured to be biased in a direction to separate from the winding drum 12.

As shown in FIGS. 2 and 3, the rotation shaft 15 includes:
A connecting member 18 is rotatably fixed integrally with the rotation shaft 15 at its base end. Below the casing 14, a drive shaft 19 common to all the spindles extends along the longitudinal direction of the machine base.
is installed, and a binion 20 is formed on its outer periphery. At the tip of the connecting member 18, there is an operating bar 22, which has a rack 21 that can engage with the pinion 20 and serves as an operating member for moving the cradle arm 11 to a predetermined highest position when the pipe is full. They are rotatably connected by 23. As shown in FIG. 2, the operating bar 22 has a length such that the rack 21 corresponds to the pinion 20 when the cradle arm 11 is in the lowered position, and is always released from the pinion 20 by a leaf spring 24. It is biased in the direction of separation. Further, as shown in FIG. 3, the operating bar 22 is provided with the pinion 2 when the cradle arm 11 is rotated to the highest position.
A cutout recess 25 that is continuous with the rack 21 is formed at a position corresponding to 0. At the lower end of the casing 14, a pressing lever 26 is rotatably mounted on a support shaft 27 for pressing the operating bar 22 to a position where its rack 21 engages with the pinion 20 against the biasing force of the leaf spring 24. A guide roller 28 is rotatably attached to the lower end of the press lever 26 and engages with the operating lever 22 to guide its movement. Above the press lever 26 is a drive lever 30, which has one end engaged with an engaging portion 26a protruding from the press lever 26 and whose other end is pivotally supported by a plunger 29 of a solenoid SQL.
It is rotatably supported by a. Further, above the solenoid SQL, there is a limit that detects when the cradle arm 11 is rotated to the highest position by engaging with the dog D that rotates integrally with the rotation shaft 15. A switch LS is provided.

On the other hand, a rod 33 having a length that traverses the entire traverse width of the thread Y is placed just before the plunger 3.
A thread removal mechanism 35 consisting of a solenoid fixed to the tip of the thread removal mechanism 35 is installed.

This mechanism 35 holds the rod 33 in a position where it does not engage the yarn during normal winding, but when an activation signal is received, it pushes up the running yarn Y from below and separates it from the traversing guide 10. It has the function of

The operation of the device configured as described above will be explained.

The drive shaft 19 is always rotated while the machine is in operation, but in the normal winding state, the solenoid SQL is not energized, so the operating bar 22 is moved by the spring force of the temporary spring 24 so that the rack 21 is rotated by the pinion 20. As the diameter of the pan cage P increases, the cradle arm 11 is gradually rotated upward (counterclockwise in FIG. 2.3). When the diameter of the package P reaches a predetermined size and the cradle arm 11 rotates to a predetermined position, the limit switch LS is activated and this signal is sent to the controller 4.
0 from the controller 40.

An activation signal is issued to the thread removal mechanism 35, causing the rod 33 to rise, pushing up the thread Y and separating it from the traversing guide IO.

At the same time, the controller 40 also sends an activation signal to solenoid SQL to energize it. As a result, the plunger 29 of the solenoid SQL is retracted and the drive lever 30
is rotated counterclockwise in FIG.
2 occupies a position where its rack 21 meshes with the pinion 20. As the rack 21 and pinion 20 engage, the actuating bar 22 is pulled down until the recess 25 provided following the rack 21 faces the pinion 20. As a result, the connecting member 1 connected to the actuating bar 22
The cradle arm 11 rotates counterclockwise around the rotation shaft 15 while supporting the puff cage P, and the cradle arm 11 also rotates counterclockwise around the rotation shaft 15 to take up the package P and transfer it to the winding drum. Release from 12.

As a result, the package P enters into inertial rotation, and at the same time the yarn Y
Since the thread Y is removed from the traverse guide 10, the thread Y is concentrated at a specific location in the width direction of the package P and wound into a thin ribbon. On the other hand, although the spinning of the yarn Y from the spinning unit 2 continues, the winding tension of the yarn gradually decreases due to the decrease in the rotational speed of the package P and the discontinuation of traversing. The winding tension of this yarn is measured by a tension sensor 31 provided on the yarn path between the pull-out roller 7 and the winding drum 12.
The sliver of the spinning unit 2 is continuously measured by a yarn breakage sensor (which may also be used as a yarn breakage sensor) and inputted to the controller 40. If this value falls below a predetermined value, the controller 40 An actuation signal is issued to a feed mechanism (not shown), which causes it to stop feeding the sliver, for example by action of a solenoid.

As a result, the spun yarn gradually becomes thinner and finally breaks, and the inertial rotation of the package P also stops.

Thereafter, the full package is removed and a new bobbin is installed in accordance with known procedures to complete the doffing operation.

In this way, on the top layer of the package P, there are
Since the yarn is wound in a concentrated manner into a narrow ribbon (see Figure 4), if you search for the end of the yarn, you will definitely find it if you search for the end of the yarn. This will make work easier when operations resume.

Note that the present invention is not limited to the above embodiments,
For example, a photoelectric switch or a proximity switch may be used instead of the limit switch LS.

〔Effect of the invention〕

As described in detail above, according to the present invention, the yarn removal mechanism is actuated by the full tube signal, and the sliver supply is stopped after the yarn is actively removed from the traversing mechanism. The thread is now wrapped in a narrow ribbon on the surface of the package, making it easier to find the end of the thread. This makes it possible to resume spinning after doffing in a short time, improving efficiency.

[Brief explanation of drawings]

Figure 1 is a side view showing the winding state of yarn in an open-end spinning machine, Figure 2 is a cross-sectional view of the cradle arm lifting mechanism at the beginning of winding yarn with a small diameter package, and Figure 3 is a side view of the winding state of the yarn in an open-end spinning machine. FIG. 4 is a cross-sectional view of the cradle arm lifting mechanism when the package is full, and a front view showing the winding state of the thread on the surface layer of the package. 2.-Spinning unit 7... Pull-out roller 10
・-・Twill guide 12・・・Take-up drum P・−
・Package 11- Cradle arm 15...
- Drive shaft 16 - Mounting member 17 - Pressure mechanism 19 - Drive shaft 20 - Binion
21-Rack 22-・Operating bar 24-Leaf spring 2
6.--Press lever 5QL-Solenoid LS-Limit switch (first detection means) 31--Tension sensor (
2nd detection means) 35 ~ Thread removal mechanism 40 - - Controller 1st Figure 2 Figure 4

Claims (1)

[Scope of Claims] 1. A yarn winding device for an open-end spinning machine in which a yarn spun from a spinning unit is pulled out by a pull-out roller, taken up by a winding drum, and then traversed by a traversing mechanism to form a package. The yarn being wound is separated from the traversing mechanism by a full yarn signal indicating that the yarn has reached a predetermined size, and the decrease in yarn tension between the pull-out roller and the winding drum caused by the stop of traversing is prevented. A method for stopping winding in an open-end spinning machine, characterized by detecting and stopping the supply of sliver to a spinning unit. 2. An opening mechanism in which the yarn spun from a spinning unit equipped with a sliver supply means is pulled out by a pull-out roller, taken up by a winding drum, and traversed by a traversing device to form a package on a bobbin held by a cradle arm. In a yarn winding device of an end spinning machine, a first detection means for detecting that the package has reached a predetermined size is provided, and a second detection means for detecting yarn tension between the pull-out roller and the winding drum. and further,
In response to the signal from the first detection means, an activation signal is issued to the thread removing means provided on the thread path near the traversing means, and in response to the signal from the second detection means, the actuation signal is activated. A winding stop device for an open-end spinning machine, characterized in that a control means is provided for issuing an activation signal to the sliver supply means to stop the supply of sliver when the value decreases below a predetermined value.