JPH0765249B2 - 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. Stop device.

[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 pulling roller, pulling it up to the winding drum, and traversing it by the traverse mechanism. In the take-up device, the package and the winding drum are separated by a full signal indicating that the package has reached a predetermined size, whereby the package is inertially rotated and the yarn traversing is stopped. A method of stopping winding in an open-end spinning machine is proposed, which detects the decrease in the tension of the yarn between the drawing roller and the winding drum that occurs and stops the supply of the sliver to the spinning unit.

According to this method, when the package reaches a full package, the package is first separated from the winding drum, so that the yarn is disengaged from the traverse guide for traversing, grooves provided on the drum, and the traversing operation is stopped. However, since the yarn is spun as it is from the spinning unit, the yarn is wound at a limited widthwise position on the package that continues to rotate without cutting. The tension of the spun yarn is gradually reduced due to the fact that the traverse is stopped and the inertial rotation speed of the package is gradually decreased. When this value reaches a predetermined value, the supply of the sliver to the spinning unit is stopped by the signal from the sensor detecting this value. As a result,
The spun yarn gradually becomes thinner and is cut 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,
The sliver is supplied to the sliver supply means when an activating signal is issued to the ascending means attached to the cradle arm, and a signal from the second detecting means is received, and when this falls below a predetermined value. 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.

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 dotted line in FIG. 1, 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 is connected to the mounting member 16. 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.

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 release state, the rack 21 occupies the 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 increases the diameter of the package P. As it is rotated, it is gradually rotated upward (counterclockwise in FIGS. 2 and 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
When the LS is activated and this signal is input to the controller 40, the controller 40
The solenoid SOL is excited by the operation signal from 40. As a result, the plunger 29 of the solenoid SOL is pulled in, the drive lever 30 is rotated in the counterclockwise direction in FIG. 2, and the pressing lever 26 is rotated in the clockwise direction against the force of the leaf spring 24. 22 is a position where the rack 21 meshes 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. Accordingly, the connecting member 18 connected to the operating bar 22 is
Rotates counterclockwise about the rotating shaft 15, and the cradle arm 11 also rotates counterclockwise around the rotating shaft 15 while supporting the package P, so that the package P is wound on the winding drum 12. To separate from.

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 above in detail, according to the present invention, the cradle arm is raised by the full tube signal, and the sliver supply is stopped after the yarn is positively removed from the traverse mechanism. Since the ribbon is wound on the surface of the package in a narrow width, the yarn end can be easily found.
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 drawings]

FIG. 1 is a side view showing a winding state of a yarn in an open-end spinning machine, FIG. 2 is a cross-sectional view of a cradle arm raising mechanism at the beginning of winding a yarn having a small diameter of the package, and FIG. FIG. 4 is a sectional view of the cradle arm raising mechanism when the pipe is full, and FIG. 4 is a front view showing a winding state of the yarn on the surface layer of the package. 2 ... Spinning unit, 7 ... Pull-out roller, 10 Traverse guide, 12 ... Take-up 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 …… Leaf spring 26 …… Pressing lever, SOL …… Solenoid LS …… Limit switch (first detection means) 31 ...... Tension sensor (second detection means) 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. By opening the package and the winding drum by a full signal indicating that the size has been reached, the package is inertially rotated and the yarn traversing is stopped, thereby causing the pull-out roller and the winding drum. A method for stopping winding in an open-end spinning machine, wherein the supply of the sliver to the spinning unit is stopped by detecting a decrease in the tension of the yarn between the spinning unit and the spinning unit. 2. A package spun 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 pull-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, upon receiving a signal from the first detecting means, issuing an operation signal to the ascending means attached to the cradle arm, and receiving a signal from the second detecting means,
A winding stop device in an open-end spinning machine, comprising control means for issuing an operation signal for stopping the supply of the sliver to the sliver supply means when this falls below a predetermined value.