JPH0765248B2 - Method and device for stopping winding of open-end spinning frame - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention is intended for preparing a doff by interrupting winding when a package formed in an open-end spinning machine reaches a predetermined diameter. And a device for implementing this.

[Conventional technology and its problems]

Conventionally, in an open-end spinning machine, a yarn spun from a spinning unit is taken up by a winding drum to form a package, and a package that has reached a predetermined diameter is released from contact with the winding drum and the winding is interrupted. As a method therefor, for example, there is a method disclosed in JP-A-60-82572. According to this, a connection member that rotates integrally with the cradle arm that supports the package is provided,
A stop mechanism is configured by connecting an operating member including a rack to this. The full tube is detected by the cradle pushing a limit switch provided near the base of the cradle arm, and the sliver supply to the spinning unit is stopped by this signal. For this reason, the spun yarn gradually becomes thin and leads to cutting,
This thread breakage is detected by the thread breakage sensor. The solenoid is excited by this signal, and the rack of the operating member is engaged with the pinion that is always rotating in a fixed direction.
Move it down. As a result, the cradle arm connected to the actuating member also moves upward, separating the package from the winding drum and stopping the winding of the yarn.

In this winding stop method, after the full pipe signal is issued, the sliver supply is first stopped to actively cause yarn breakage, and then the package is separated from the winding drum, so that the package is wound. The yarn is distributed evenly over the entire width of the package by traversing at the time of winding, and the yarn spun after the sliver supply is stopped is gradually thin, so it is difficult to find the yarn end,
There is a drawback that it takes time and effort to take out the yarn end in the next work, the weaving process and the knitting process.

[Means for solving problems]

The present invention aims to solve the above-mentioned problems of the prior art, so that the yarn at the end of winding is located at a predetermined position of the package so that the yarn end on the package can be easily and surely found at the time of doffing. For example, the present invention provides a method and an apparatus for centrally winding a wire in a central portion.

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

According to this method, when the package reaches the full package, the yarn being wound is first released from the traverse mechanism by this signal, and thus the traverse operation is stopped. However, since the yarn is spun as it is from the spinning unit, the yarn continues to be wound on the package without being cut, but because the traverse is stopped, it has a length that allows traverse. Since the drawn-out yarn is wound up at a certain position and the path difference is eliminated, the tension of the spun yarn between the draw-out roller and the winding drum is reduced. The supply of the sliver to the spinning unit is stopped by the signal from the sensor that detects this decrease in tension. As a result, the spun yarn gradually becomes thinner and breaks after some time. Until then, the winding of the yarn is continued, but since traverse is not performed, the yarn is wound in a narrow band at a specific portion on the package to clearly show the existence of the yarn end.

According to the second aspect of the present invention, as a device for carrying out the above-mentioned method, a yarn spun from a spinning unit equipped with a sliver supply means is pulled out by a pull-out roller, and is taken up by a winding drum to traverse. In a yarn winding device of an open-end spinning machine that forms a package on a bobbin held by a cradle arm while traversing by means, first detecting means is provided for detecting that the package has reached a predetermined size. Second detecting means for detecting the yarn tension is provided between the pull-out roller and the winding drum, and further receives a signal from the first detecting means,
When an operation signal is issued to the yarn removing means provided on the yarn path near the traverse means and the signal from the second detecting means is received, and the signal is lower than a predetermined value, the sliver supplying means. There is provided a winding stopping device in an open-end spinning machine, which is provided with control means for issuing an operation signal for stopping the supply of the sliver.

Hereinafter, the present invention will be described in more detail with reference to the preferred embodiments shown in the drawings.

〔Example〕

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

The cradle arm 11 is fixed to a mounting member 16 that is integrally rotatably fixed to a rotating shaft 15 that is supported so as to extend parallel to the longitudinal direction of the machine base with respect to the casing 14. As shown by the chain double-dashed line in FIG. 1, the mounting member 16 has a pressure mechanism 17 for adjusting the pressure contact force of the package P supported by the cradle arm 11 to the winding drum 12.
Are connected. The pressing mechanism 17 urges the cradle arm 11 to rotate toward the winding drum 12 from the beginning of winding until the package P reaches a predetermined diameter by the action of a compression spring, and the package diameter becomes larger than a predetermined value. If it becomes, the cradle arm 11 is configured to be urged in a direction of separating from the winding drum 12.

As shown in FIGS. 2 and 3, a connecting member 18 is fixed to the rotary shaft 15 at its base end so as to be rotatable integrally with the rotary shaft 15. Below the casing 14, a drive shaft 19 common to all weights extending along the longitudinal direction of the machine base is installed, and a pinion 20 is formed on the outer periphery thereof.
At the tip of the connecting member 18, there is a rack 21 engageable with the pinion 20, and an operating bar 22 as an operating member for moving the cradle arm 11 to a predetermined maximum raised position when the pin is full, It is rotatably connected by 23. As shown in FIG. 2, the operating bar 22 is formed to have a length such that the rack 21 corresponds to the pinion 20 when the cradle arm 11 is in the lowered position.
Is always urged in a direction to separate from the pinion 20. Further, as shown in FIG. 3, the operation bar 22 has a notch recess 25 continuous with the rack 21 at a position corresponding to the pinion 20 when the cradle arm 11 is rotated to the highest position. Are formed. The casing 14
A pressing lever 26 for pressing the operating bar 22 against the urging force of the leaf spring 24 at a position where the rack 21 meshes with the pinion 20 is rotatably supported by a support shaft 27 at the lower end of the The operating lever is provided at the lower end of the pressing lever 26.
A guide roller 28 that engages with 22 and guides its movement is rotatably attached. Above the pressing lever 26, one end is engaged with an engaging portion 26a protruding from the pressing lever 26, and the other end is pivotally supported by a plunger 29 of a solenoid SOL. It is rotatably supported. Further, above the solenoid SOL, when the cradle arm 11 is rotated to the highest position, by engaging with a dog D that is integrally rotated with the rotating shaft 15, a limit for detecting it is provided. Switch LS is provided.

On the other hand, immediately before the traverse guide 10, a yarn removing mechanism 35 including a solenoid having a rod 33 having a length that traverses the entire traverse width of the yarn Y is fixed to the tip of the plunger 34. This mechanism 35 holds the rod 33 at a position where it does not engage with the yarn during normal winding, but when receiving an operation signal, it pushes up the traveling yarn Y from below and separates it from the traverse guide 10. It has the function of

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

The drive shaft 19 is constantly driven to rotate during operation of the machine base,
Since the solenoid SOL is not excited in the normal winding state, the rack 21 occupies a position where the rack 21 cannot engage with the pinion 20 due to the spring force of the leaf spring 24, and the cradle arm 11 has the same diameter as the package P. It gradually turns upward (counterclockwise in Figs. 2 and 3) as it increases. When the diameter of the package P reaches a predetermined size and the cradle arm 11 rotates to a predetermined position, the limit switch
When the LS is activated and this signal is input to the controller 40, the controller 40
An actuation signal from 40 causes an actuation signal to be issued to the yarn removing mechanism 35, which raises the rod 33 and pushes up the yarn Y to separate it from the traverse guide 10.

At the same time, the controller 40 also sends an operation signal to the solenoid SOL to excite it. This allows the solenoid SOL
2, the drive lever 30 is rotated in the counterclockwise direction in FIG. 2, the pressing lever 26 is rotated in the clockwise direction against the force of the leaf spring 24, and the operating bar 22 is moved to its rack 21.
Occupy the position where it engages with the pinion 20. When the rack 21 and the pinion 20 mesh with each other, the operating bar 22 is pulled down until the recess 25 provided subsequent to the rack 21 faces the pinion 20. As a result, the connecting member 18 connected to the actuating bar 22 rotates counterclockwise about the rotating shaft 15, and the cradle arm 11 also supports the package P and also rotates counterclockwise about the rotating shaft 15. And the package P is separated from the winding drum 12.

As a result, the package P enters inertial rotation, and at the same time, the yarn Y
Since the yarn Y is out of the traverse guide 10, the yarn Y is concentrated on a specific portion in the width direction of the package P and wound into a thin ribbon. On the other hand, the spinning of the yarn Y from the spinning unit 2 is continued, but the winding tension of the yarn gradually decreases due to the decrease in the rotation speed of the package P and the suspension of traverse. The take-up tension of the yarn is determined by the pull-out roller 7 and the take-up drum 12
It is continuously measured by a tension sensor 31 (which may also be used as a thread breakage sensor) provided in the yarn path between and, and is input to the controller 40, but this value falls below a predetermined value. In that case, an operation signal is issued from the controller 40 to the sliver supply mechanism (not shown) of the spinning unit 2,
For example, the supply of the sliver is stopped by the action of the solenoid.

As a result, the spun yarn is gradually thinned and finally cut, and the inertial rotation of the package P is also stopped. After that, the full package is removed and a new bobbin is mounted according to a known procedure to complete the doffing work.

Thus, the uppermost layer of the package P is
Since the yarn is concentratedly wound in a narrow ribbon shape (see Fig. 4), it is always possible to find this when searching for the yarn end when searching for the yarn end. It becomes easy to take out the yarn end during the stroke.

The present invention is not limited to the above embodiment,
For example, the limit switch LS may be replaced with a photoelectric switch or a proximity switch.

〔The invention's effect〕

As described in detail above, according to the present invention, the yarn removing mechanism is activated by the full-tube signal, and the sliver supply is stopped after the yarn is actively removed from the traverse mechanism. Is now wrapped around the surface of the package in a narrow ribbon shape, making it easier to find the yarn end. As a result, it is possible to take out the yarn bridge during the weaving process and the knitting process in a short time, and the efficiency is improved.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side view showing a winding state of a yarn in an open-end spinning machine, and FIG. 2 is a cross-sectional view of a cradle arm raising mechanism at the beginning of winding a yarn having a small package diameter. FIG. 3 is a cross-sectional view of the cradle arm lifting mechanism when the package is full, and FIG. 4 is a front view showing a wound state of the yarn on the surface layer of the package. 2 …… Spinning unit, 7 …… Drawer roller 10 …… Travel guide, 12 …… Winding drum P …… Package, 11 …… Cradle arm 15 …… Rotating shaft, 16 …… Mounting member 17 …… Addition Pressure mechanism, 19 …… Drive shaft 20 …… Pinion, 21 …… Rack 22 …… Operating bar, 24 …… Plate spring 26 …… Pressing lever, SOL …… Solenoid LS …… Limit switch (first detection means) 31 ...... Tension sensor (second detecting means) 35 ...... Thread removing mechanism, 40 ...... Controller

Claims (2)

[Claims] 1. A yarn winding device of an open-end spinning machine, wherein a yarn is spun from a spinning unit, is drawn by a pulling roller, is drawn to a winding drum, and is traversed by a traverse mechanism to form a package. The yarn being wound is released from the traverse mechanism by a full pipe signal indicating that the yarn has reached the size, and a decrease in yarn tension between the pull-out roller and the take-up drum caused by stopping traverse is detected. A method for stopping winding in an open-end spinning machine, characterized in that supply of a sliver to a spinning unit is stopped. 2. A package drawn on a bobbin held by a cradle arm while pulling out a yarn spun from a spinning unit equipped with a sliver supply means by a draw-out roller, taking it up to a winding drum and traversing it by a traverse means. In the yarn winding device of the open-end spinning machine to be formed, the first detecting means for detecting that the package has reached a predetermined size is provided, and the yarn tension is detected between the pull-out roller and the winding drum. 2 detecting means is provided, and further, in response to a signal from the first detecting means, an operation signal is issued to a yarn removing means provided on a yarn path near the traverse means, and the second detecting means is provided. And a control means for issuing an operation signal for stopping the supply of the sliver to the sliver supply means when the signal is lowered from a predetermined value. Winding stopping device in open-end spinning machine, characterized in that digit.