JPH10167573A - Spun yarn winding machine for resilient yarn and yarn changeover method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a spun yarn winding machine for resilient yarns, which is capable of changing over the yarn certainly using a simple structure and also removing unnecessary yarns produced at yarn changing-over without risk of damaging the package. SOLUTION: This device comprises bobbin holders 15 and 16, a touch roller 3, traverse device 4, turret 2, and yarn guide 7. The yarn Y wound into a package P with the yarn guide 7 is set off from the winding width, and the yarn tension is decreased for slackening of the yarn Y, and the yarn Y having expanding/contracting property is allowed to wind fast on an empty bobbin Be certainly when the yarn guide 7 in the yarn changeover position M rotates and contacting is generated after the yarn Y is wound fast on the empty bobbin Be.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a bobbin holder,
A touch roller, a traverse device, and a bobbin holder position changing means, and when the package is fully wound, the bobbin holder provided with an empty bobbin and the bobbin holder on the fully wound package side are swapped to switch yarn to an empty bobbin. The present invention relates to a yarn winding machine for yarn.

[0002]

2. Description of the Related Art A conventional spinning winder for elastic yarn of this kind is
A turret type take-up winder is generally used in which a turret plate on which two bobbin holders are mounted is rotated to exchange the positions of the bobbin holders, and when the package becomes full, the yarn is switched to an empty bobbin and the yarn is continuously wound. is there. In this spinning winder, as shown in FIG. 2C, the turret 2 is rotated and stopped so that the empty bobbin Be comes to an intermediate position M past the winding position K. Then, the yarn guide 7, which is a yarn winding means, is moved so that the yarn Y makes one turn around the empty bobbin Be, the full winding package P is suddenly braked to loosen the yarn Y, and the elastic yarn Ya is emptied from the empty bobbin Be. Stick on the surface of.
The yarn Ya is wound around the surface of the empty bobbin Be, and the package P
The bobbin B is cut between the empty bobbin Be and the full winding package P due to the yarn tension generated when the side yarn Ya is wound.
The next elastic yarn Y is wound from above the elastic yarn Y stuck to e to fix the yarn end. After the yarn winding guide 7 is returned, the empty bobbin Be is returned to the winding position K as shown in FIGS. 2D and 2E, and the traverse device 4 shifts to the main winding.

FIG. 4 shows a position of a yarn guide 7 serving as a yarn winding means, a full winding package P, and a yarn Y wound around an empty bobbin Be. When the yarn guide 7 moves in the state shown in FIG. 2C, the traversing yarn Y is captured by the guide groove 9 including the two curved portions 10 provided on the guide bar 18 of the yarn guide 7. Then, the yarn guide 7 is moved so that the yarn Y makes one round along the outer periphery of the empty bobbin Be, the full winding package P is suddenly braked to loosen the yarn Y, and the downstream yarn is changed to the upstream yarn. Make sure that the empty bobbin Be
Stick on the surface of. This is because when the yarn Y is wound around the empty bobbin Be, if the yarn tension is relaxed and the yarns are reduced in advance and the yarns are not brought into sufficient contact with each other, the yarns that have been elongated during the winding will This is because if the amount of contact of the yarn is small because the contact is reduced after the contact, the yarns that have come into contact with each other are separated and the yarn switching fails.

[0004]

As described above, in this conventional spinning winder, the full winding package is suddenly braked to loosen the yarn, and the elastic yarn is stuck on the surface of the empty bobbin. For this reason, a braking device that applies sudden braking to the extent that assists winding around the empty bobbin is required. In addition, a rod winding in which unnecessary yarn generated at the time of yarn switching is wound at one place can be formed on the surface of the fully wound package. Although this unnecessary thread, in this case, is a rod wound, the physical properties of the thread are different due to different conditions such as the thread tension at the time of ordinary winding and must be removed without fail. However, since the elastic yarn is thin and has high adhesiveness, the yarn end cannot be found only by suctioning at the suction, and it is very difficult to find the yarn end. For this reason, the bar-wound portion has been removed by picking the thread at the bar-wound portion, not at the thread end, with a nail and pulling it out of the package. At this time, the claws often damage the package surface.

The present invention has been made by paying attention to such problems existing in the prior art. The challenge is
An object of the present invention is to provide an elastic yarn spinning winder capable of reliably performing yarn switching with a simple structure and removing unnecessary yarn generated at the time of yarn switching without damaging a package.

[0006]

In order to achieve the above object, according to the first aspect of the present invention, the yarn wound on the package is removed from the winding width, and the yarn is fully wound with a peripheral speed difference. A yarn switching means is provided for switching a yarn to an empty bobbin by utilizing a decrease in the yarn tension caused by being wound around the bobbin end of the package.

According to a second aspect of the present invention, the yarn switching means is configured to double as a yarn winding means for winding the elastic yarn around the empty bobbin. According to the third aspect of the present invention, in the yarn winding winder for an elastic yarn according to the second aspect, after the supply yarn to the full winding package side is removed from the winding width by the yarn switching means, the yarn winding means becomes empty. The time required for the yarn on the downstream side of the bobbin to come into contact with the yarn on the upstream side of the empty bobbin is set to the time at which a bunch winding is formed at the end of the fully wound package.

According to the first aspect of the present invention, the tension is reduced by removing the supply yarn from the surface of the package having a high rotation speed to the end of the bobbin having a low rotation speed,
By utilizing the decrease in the tension, the elastic yarn is slackened and acts to assist in winding around the empty bobbin.

According to the second aspect of the invention, the yarn switching means acts to remove the yarn from the winding width of the package, and acts to wind the detached yarn as it is on the empty bobbin as the yarn winding means.

According to the third aspect of the present invention, when the winding is changed from the full-wound package to the empty bobbin, before the yarn on the downstream side of the empty bobbin contacts the yarn on the upstream side and the yarn switching is completed, It acts to secure a time margin for forming a bunch winding at the end of the bobbin of the full winding package.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, the basic structure of the take-up winder 5 will be described. The spinning winder 5 has a structure in which an elevating frame 1 which can be raised and lowered freely on a machine frame 8 and a rotatable turret 2 which is a bobbin holder position exchanging means are provided. The elevating frame 1 supports a touch roller 3 and a traverse device 4, respectively. The touch roller 3 is always in pressure contact with a yarn layer of a bobbin at a winding position, which will be described later. Is driven to rotate. In addition, the traverse device 4
Is provided with a traverse guide 6. The traverse guide 6 engages with the yarn Y and reciprocates in the traverse range to traverse the yarn Y.

The turret 2 is driven around a rotating shaft 14 by a drive source such as an induction motor (not shown). Several bobbins are inserted into the two bobbin holders 15 and 16, respectively. One bobbin holder 15 is located at the winding position K and the other bobbin holder 16 is located at the standby position L. For ease of explanation, the bobbin around which the package P is wound is referred to as a bobbin Bf and the empty bobbin is referred to as Be.

The yarn guide 7 serving as a yarn winding means includes a swing arm 17 pivotally supported at a lower portion of the machine frame 8, and a guide bar 18 attached to a tip of the swing arm 17. The swing arm 17 is provided on the tip side of the bobbin holders 15 and 16, and from this tip side, the bobbin holder 15,
The guide bar 18 is cantilevered at the base of 16. The empty bobbin Be at the yarn switching position is shown in FIG.
When the swing arm 17 is rotated at the intermediate position M shown in FIG. 7, the rotation shaft 19 of the swing arm 17 is provided at a position where the guide bar 18 can wind the thread Y around the empty bobbin Be. The reason why the yarn switching position is set to the intermediate position M between the winding position K and the standby position L is that the winding angle of the yarn Y with respect to the empty bobbin Be is increased to about ３ or more of the entire circumference, and the rotation of the yarn guide 7 is increased. In addition to reducing the amount, the yarn guide 7 is
This is because the structure of the spinning winder is simplified by adopting a structure in which only the rotational movement is performed at a position deviating from the rotation locus of No. 6.

The swing arm 17 swings about 180 degrees about a shaft 19 by driving means such as a rotary actuator (not shown), and the thread guide 7 is moved at two points from the standby position indicated by the solid line in FIG. Move to the operating position of the dashed line. When the yarn guide 7 rotates counterclockwise from the standby position to the operating position, the downstream yarn Ya is wound along the outer periphery of the empty bobbin Be as shown in FIG. The yarn guide 7 is rotated to a position where the groove 9 completely contacts the yarn Yb spun from the upstream side. For this reason,
The yarn Ya in the guide groove 9 and the yarn Yb spun from the upstream side
Are in contact with each other in the guide groove 9 which is also a member for regulating the movement of the yarn. The yarns Ya and Yb in contact with each other are elastic yarns and have high viscosity. The yarn Ya is wound around the empty bobbin Be by being wound around the yarn Yb, and the yarn Ya is stretched and cut.

The guide bar 18 is attached to the tip of the swing arm 17 and has a guide groove 9 into which the thread Y enters as shown in FIG. The guide groove 9 includes a curved portion 10 that guides the yarn Y along a curved line and a cut portion 11 that regulates the yarn Y guided by the curved portion 10. A groove portion where the curved portion 10 and the cut portion 11 meet is a groove. The thickness is slightly larger than the thickness of the yarn, so that the yarn Ya and the yarn Yb can be reliably contacted. The position where the curved portion 10 and the cut portion 11 meet each other is outside the winding width (traversing range) of the package P.
Is wound around the empty bobbin Be, and also serves as a yarn switching means for removing the yarn Y from the surface of the fully wound package P to the end of the bobbin Bf.
For this reason, the number of parts can be reduced, and the structure and control of the spinning winder can be simplified.

The yarn Ya removed from the full package P by the guide groove 9 to the end of the bobbin Bf is
From the high peripheral speed of the bobbin Bf to the low peripheral speed of the bobbin Bf. Positively utilizing the momentary decrease in the yarn tension, the conventional package P is suddenly braked to loosen the yarn Ya, and the elastic yarn Ya and the yarn Yb are surely and sufficiently provided. It is intended to be in contact with and instead of assisting winding around the empty bobbin Be.

Then, from the full package P to the bobbin B
The tension of the yarn Ya detached to the end side of f is not only instantaneously reduced, but also continuously reduced until the yarn switching is completed and the yarn is cut. This is because the spinning winder controls the rotation of the bobbin holder so that the peripheral speed of the full bobbin package P and the peripheral speed of the empty bobbin Be are the same, so that the peripheral speed of the empty bobbin Be is higher than the full bobbin Bf. This is because it becomes faster than the peripheral speed of. In other words, empty bobbin Be
This is because the tension of the yarn Ya downstream of the empty bobbin Be is reduced by performing the same function as the feed roller.

This means that the yarn can be switched reliably even after a while, after the bobbin Bf has been removed from the full package P. That is, after the bunch winding 12 is performed in which the unnecessary yarn generated at the time of the yarn switching is repeatedly wound around the end portion of the bobbin Bf in one place many times, the yarn Ya and the yarn Yb are brought into contact with each other to perform the yarn switching. That is to say. The bunch winding 12 is different from a rod winding, in which a thread is wound many times at one place on the package surface, because the thread end comes to the end side of the bobbin Bf.
Unnecessary yarn generated at the time of yarn switching can be easily removed without damaging the package P.

The drive means of the yarn guide 7 and the drive source of the turret 2 are controlled by a control device (not shown) to control the timing and speed of rotation.

Next, a method for switching the yarn of the above-described yarn winding machine 5 will be described with reference to FIG. In FIG. 2A, when the package P is fully wound, the turret 2 is rotated counterclockwise, and further rotated past the yarn switching position of the ordinary spinning winder 5 shown in FIG. 2B. 2 in which the empty bobbin Be is at an intermediate position M between the winding position K and the standby position L.
When reaching (c), the rotation of the turret 2 is stopped. At this time, the elastic yarn Y is pressed against the surface of the empty bobbin Be, and travels in a state of being in contact with (adhering to) about 1/3 or more of the entire circumference of the empty bobbin Be. For ease of explanation, the upstream side of the empty bobbin Be of the yarn Y is defined as Yb, and the downstream side of the empty bobbin Be is defined as Ya. Then, at the same time when the yarn Y comes into contact with the empty bobbin Be, the peripheral speed of the empty bobbin Be is increased by 0 to 50%, and the tension on the Ya side is reduced.

The elastic yarn winder continues to traverse the yarn Y even when the position of the bobbin holder is exchanged. When the empty bobbin Be reaches the intermediate position M and rotates the yarn guide 7 counterclockwise, the traversing yarn Ya is caught in the guide groove 9. Thereafter, the yarn guide 7 is further rotated to move the yarn Ya along the curved portion 10 from the surface of the fully wound package P to the end side of the bobbin Bf, and capture and guide the yarn Yb on the upstream side. The yarn guide 7 is rotated until it comes into contact with the yarn Yb. When the yarn Ya is moved from the surface of the full-wound package P to the end of the bobbin Bf, a significant decrease in the yarn tension occurs due to a difference between the peripheral speed of the full-wound package P and the peripheral speed of the bobbin Bf. Then, due to the decrease in the yarn tension, the yarn Y is slackened without suddenly applying a braking force to the bobbin holder 15 on the full winding package P side, and the yarn Ya and the yarn Yb surely and sufficiently contact each other in the guide groove 9, and the yarn Ya is The yarn Yb is securely wound, the yarn Ya is stretched and cut, and the yarn Y is wound around the empty bobbin Be.

When the yarn Y is wound around the empty bobbin Be and the yarn switching is completed, the turret 2 is rotated clockwise,
As shown in FIG. 2E, the empty bobbin Be is moved to the winding position K, the empty bobbin Be is brought into contact with the touch roller 3, and the operation is shifted to the main winding. At this time, the rotation of the turret 2 is shown in FIG.
The package may be stopped at the position (d) and moved to the state shown in FIG. 2E after the package has a predetermined diameter.

In the above-described winding method, the yarn guide 7 moves the yarn Y from the full-wound package P to the bobbin Bf by the guide groove 9 and also hooks the yarn Ya to reduce the yarn switching tension. The thread guide 7 is rotated until it comes into contact with. That is, the yarn Ya is loosened using only the decrease in the tension when the yarn Y comes off from the surface of the package P to the end of the bobbin Bf, and the yarn Ya is securely wound around the empty bobbin Be. In the method, the bunch winding 12 is not always necessary and sufficient. For this reason, a method for reliably forming the bunch winding 12 will be described below in the sense of preventing the yarn end from being unraveled during the transport.

The above-mentioned method means that the empty bobbin B
When e is reached, the procedure is the same up to the point where the yarn guide 7 is rotated counterclockwise, and therefore the description is omitted. Intermediate position M
Is reached, the thread guide 7 is rotated counterclockwise. The yarn guide 7 moves the yarn Ya from the surface of the full package P to the end of the bobbin Bf by the guide groove 9, and captures and guides the upstream yarn Yb, so that the yarn Ya comes into contact with the yarn Yb before contacting the yarn Yb. The rotation of the guide 7 is stopped.
When the rotation of the yarn guide 7 is stopped, the yarn Ya is continuously wound at one position on the bobbin Bf outside the winding range, and the bunch winding 12 is formed. And bobbin B
f, after the necessary and sufficient bunch winding 12 is formed, the yarn Ya
The yarn guide 7 is rotated until the contacts the yarn Yb. Since the rotational speeds of the bobbin Bf and the empty bobbin Be are different, the yarn Y
a remains in a state where the tension is reduced, the yarn Ya is slackened without applying an acute movement to the bobbin holder 15 on the side of the full winding package P, and the yarn Ya and the yarn Yb, both of which are regulated in the guide groove 9, are surely formed. , Enough contact, and the yarn Ya is securely
The yarn Y
Wraps around the empty bobbin Be. The process of setting the empty bobbin Be to the winding position K after the yarn Y is wound around the empty bobbin Be and the yarn switching is completed is the same as the above-described method, and therefore the description is omitted.

The present invention may be embodied as follows. (1) In the present embodiment, as a method for reliably forming the bunch winding 12, the rotation of the yarn guide 7 is stopped halfway, but the speed of rotating the yarn guide 7 is reduced to reduce the yarn Ya.
And the yarn Yb contact with each other to delay the cutting of the yarn Ya, so that the bunch winding 12 can be formed reliably.

(2) In this embodiment, the yarn guide 7 includes a yarn switching means for removing the yarn Y from the package P to the bobbin Bf and a winding means for winding the yarn Ya around the empty bobbin Be at the yarn switching position. Although the yarn switching means and the yarn winding means are separately provided, they may be controlled separately. The thread switching means may be used without using the thread winding means. That is, the instantaneous decrease in the yarn tension due to the transfer of the yarn Ya from the surface of the full package P to the end of the bobbin Bf, and the constant decrease in the constant tension due to the peripheral speed difference between the full bobbin Bf and the empty bobbin Be. It is also possible to adopt a configuration in which the yarn switching on the downstream side is performed by winding and winding the yarn Ya on the downstream side into the empty bobbin Be using only the above.

In the present embodiment, the yarn Y in the traverse range is moved out of the traverse range by devising the shape of the yarn guide 7, but the yarn guide 7 is moved within the traverse range as in the prior art. In addition to making the yarn restrainable, it is slidable parallel to the bobbin holders 15 and 16,
After the yarn Y is once restrained within the traverse range at the time of yarn switching, the yarn guide 7 may be slid to remove the yarn Y from the package P to the bobbin Bf, and then wound around the empty bobbin Be. In this case, the yarn switching means and the yarn winding means may be separated, or only the yarn switching means may be used.

(3) In the present embodiment, the yarn switching position is performed by moving the empty bobbin Be to an intermediate position M between the winding position K and the standby position L. This may be performed in a state where the empty bobbin Be has been moved to the winding position K.

[0029]

Since the present invention is configured as described above, it has the following effects.

According to the first aspect of the present invention, since the difference between the peripheral speed of the package and the peripheral speed of the bobbin of the full package is positively used, a large brake for applying an acute movement to the full package is used. No equipment is required. Therefore, even if a braking device is provided, only a small device for finally stopping the inertial rotation of the full-wound package is required, and it is possible to provide a spinning winder capable of reliably switching yarns with a simple structure.

According to the second aspect of the present invention, the yarn is removed from the winding width of the package as the yarn switching means, and the detached yarn is wound as it is on the empty bobbin as the yarn winding means. The number of parts can be reduced, the structure of the spinning winder can be simplified, and the control can be simplified.

According to the third aspect of the invention, the unnecessary yarn generated at the time of yarn switching can be reliably wound around the bobbin. Also, unnecessary yarn generated at the time of yarn switching is wound around the bobbin from the package surface at one location, so that unnecessary yarn can be removed without damaging the package. Therefore,
An elastic yarn spinning winder capable of removing unnecessary yarn generated at the time of yarn switching without damaging the package can be provided.

[Brief description of the drawings]

FIG. 1 is a front view of a main part of a spinning winder according to an embodiment.

FIG. 2 is a diagram showing a yarn switching of the spinning winder according to the embodiment.

FIG. 3 is a diagram illustrating a position of a yarn wound around a yarn guide, a full-wrap package, and an empty bobbin according to the embodiment;

FIG. 4 is a view showing a conventional yarn guide, a fully wound package, and a position of a yarn wound around an empty bobbin.

[Explanation of symbols]

 2 Turret (bobbin holder position exchange means) 3 Touch roller 4 Traverse device 5 Spinning take-up machine 7 Thread guide (yarn switching means and yarn winding means) 12 Bunch winding (unnecessary thread) 15 Bobbin holder 16 Bobbin holder P package Be Empty bobbin Bf package Bobbin Y yarn (elastic yarn)

Claims (3)

[Claims] In an elastic yarn spinning winder provided with a bobbin holder, a touch roller, a traverse device, and a bobbin holder position changing means, a yarn wound around a package is removed from a winding width, and the yarn is wound. A yarn winding device for an elastic yarn, characterized by comprising a yarn switching means for switching a yarn to an empty bobbin by utilizing a decrease in yarn tension caused by being wound around a bobbin end portion of a full winding package having a peripheral speed difference. . 2. The elastic yarn spinning winder according to claim 1, wherein the yarn switching means also serves as a yarn winding means for winding the elastic yarn around the empty bobbin. 3. The elastic yarn spinning winder according to claim 2, wherein after the supply yarn to the full winding package side is removed from the winding width by the yarn switching means, the yarn winding means is located downstream of the empty bobbin. A yarn switching method for an elastic yarn spinning winder, wherein a time until a yarn is brought into contact with a yarn on an upstream side of an empty bobbin is set to a time at which a bunch winding is formed at an end portion of a fully wound package.