JP2003095535A - Ribboning preventing device and method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem in a conventional winding device that a ribbon breaker for preventing occurrence of ribboning has a constitution for always periodically turning on or off a drum motor for driving a slow vibration drum, therefore power consumption increases, a winding speed of a thread strip is decreased by turning off the drum motor, and thus productivity is reduced. SOLUTION: In a ribboning preventing device, the thread strip Y is slowly vibrated and wound on a package 3 by the slow vibration drum 6 having a plurality of continuous traverse grooves 11 having different number of windings, and it is switchable as necessary by which traverse groove 11 the thread strip is slowly vibrated, of the plurality of traverse grooves 11. A package brake 36 for charging a load in the rotation direction of the package 3 is disposed in a cradle 22 for supporting the package 3 and the package brake 36 is operated at a suitable timing, thereby slipping the package 3 with respect to the slow vibration drum 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ribbon winding prevention device and method for preventing ribbon winding formed when a package is produced by a winding device such as an automatic winder.

[0002]

2. Description of the Related Art Conventionally, in a winding device such as an automatic winder, a yarn unwound from a spinning bobbin or the like is traversed left and right by a traverse drum having traverse grooves. Winding is performed on a package that is pressed against a vibration drum and driven to rotate. in this way,
In the process of winding the yarn around the package while traversing it,
When the package diameter and the drum diameter of the traverse drum have a certain relationship, ribbon winding occurs on the winding package. Ribbon winding is a phenomenon in which the yarns wound on the package pass through substantially the same yarn path for a certain period, and the number of intersections of the yarns on the package is extremely reduced. The package having such ribbon winding has a problem that the yarn unwinding property in the subsequent step is deteriorated. Further, the ribbon winding may appear as an appearance ribbon on the surface layer of the package.

Therefore, conventionally, by periodically turning on and off a drum motor that rotationally drives a traverse drum, a ribbon breaker that slips a package with respect to the traverse drum prevents the occurrence of ribbon winding. . As the ribbon breaker, the package is oscillated so that the contact pressure of the left and right ends of the package with respect to the traverse drum is periodically changed, and the package is slipped with respect to the traverse drum. Alternatively, the package is configured to be slightly lifted from the traverse drum, and the package is slipped with respect to the traverse drum. Such a ribbon breaker for slipping the package with respect to the traverse drum is always operated from the winding start to the winding end of the package, and the one having a configuration of periodically turning the drum motor on and off, Mainly used.

[0004]

However, particularly in a ribbon breaker configured to periodically turn on / off the drum motor, since the drum motor is always turned on / off, power consumption increases and the drum motor is There has been a problem that productivity is deteriorated as the winding speed of the yarn is decreased by turning it off. Also, if the ribbon winding is eliminated by the above-mentioned ribbon breaker, the package will always slip with respect to the traverse drum, and the friction will damage the yarn and increase the fluff, resulting in deterioration of the package quality. However, there is a problem that defective winding such as twisting is increased.

[0005]

The above is the problem to be solved by the present invention. Next, the means for solving the problem will be described. That is, as described in claim 1, a traverse drum having a plurality of continuous traverse grooves having different numbers of winds traverses the yarn and winds the package into a package, and any traverse groove among the plurality of traverse grooves is wound. In a ribbon winding prevention device capable of appropriately switching whether a yarn is traversed by a groove, a package brake that applies a load in the rotation direction of the package is provided in a cradle that supports the package, and the package brake is appropriately timed. The actuation causes the package to slip relative to the traverse drum.

Further, according to a second aspect of the present invention, the package brake is activated when the rotation speed of the package reaches the same rotation speed as the traverse drum or a half rotation speed.

Further, as described in claim 3, a traverse drum having a plurality of continuous traverse grooves having different wind numbers is used to select any one of the traverse grooves as appropriate to traverse the yarn and package the package. When the package reaches the same rotational speed as the traverse drum or half the rotational speed of the traverse drum while being wound up, a load is applied in the rotational direction of the package by the package brake provided in the cradle that supports the package, and the package is rotated. Slip against the traverse drum.

Further, as described in claim 4, the yarn is traversed by the traverse drum in which a plurality of continuous traverse grooves having different wind numbers are formed, and the yarn is wound into a package,
Of the plurality of traverse grooves, a ribbon winding prevention device capable of appropriately switching which traverse groove is used to traverse the yarn is provided with a contact pressure adjuster capable of adjusting the contact pressure of the traverse drum of the package, The contact pressure adjuster reduces the contact pressure of the package with respect to the traverse drum at an appropriate timing, so that the package slips with respect to the traverse drum.

According to a fifth aspect of the present invention, the contact pressure adjuster is activated when the rotational speed of the package reaches the same rotational speed as the traverse drum or a half rotational speed.

Further, as described in claim 6, by the traverse drum having a plurality of continuous traverse grooves having different wind numbers, any one of the traverse grooves is appropriately selected and the package is traversed while the yarn is traversed. When the package rotation speed reaches the same rotation speed as the traverse drum or half of the traverse drum speed, the contact pressure adjuster that can adjust the contact pressure of the package traverse drum reduces the contact pressure. , Slip the package against the traverse drum.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described with reference to the accompanying drawings. 1 is a schematic configuration diagram of an automatic winder equipped with a ribbon winding prevention device of the present invention, FIG. 2 is a development view of a traverse drum showing a yarn path during normal operation, and FIG. 3 is a yarn path during ribbon winding diameter operation. FIG. 4 is a development view of the traverse drum shown in FIG. 4, and FIG. 4 is a side view showing another embodiment of the automatic winder equipped with the ribbon winding prevention device.

First, a schematic structure of an automatic winder using the ribbon winding prevention apparatus and method according to the present invention will be described. The automatic winder 1 is a device that unwinds a yarn from a spinning bobbin formed by a ring spinning machine or the like and rewinds it as a package 3. As shown in FIG. 1, the yarn unwound from the spinning bobbin arranged below is sent to the upper part, passed through the yarn defect detection head 5, and then traversed by the traverse drum 6, and then the package. It is rolled up to 3. The package 3 is supported by the cradle 22.

A continuous traverse groove 11 is formed on the drum surface of the traverse drum 6. The traverse groove 1
1 is composed of a traverse forward path 11F that conveys the yarn to the left in FIG. 1 and a traverse return path 11B that conveys the yarn to the right, and the yarn Y traversed to the left in the traverse outward route 11F continues. Te traverse return 11B
Will return to the original position even if it is traversed to the right. Also,
A package 3 that is in pressure contact with the traverse drum 6 is disposed above the traverse drum 6, and the package 3 is rotationally driven by the traverse drum 6. The yarn Y traversed by the traverse groove 11 is wound around the package 3. This yarn Y is package 3
Ribbon winding occurs when the diameter of the package 3 reaches a certain diameter during the winding process.

Therefore, the traverse groove 11 formed in the traverse drum 6 is formed with two kinds of continuous traverse grooves 11 having different wind numbers (hereinafter appropriately referred to as W) in order to prevent ribbon winding. ing. One of them is 2.5W for both the traverse forward route 11F and the traverse backward route 11B.
It is the traverse groove 11 in the normal operation configured by The other is the traverse groove 11 at the time of ribbon winding diameter operation in which the traverse outward path 11F is 3 W, the traverse return path is 2.5 W, and the traverse groove 11 is composed of 2 traverses (2 reciprocations) and has an average drum wind number of 2.75 W.

Referring to FIG. 2, the traverse groove 1 during normal operation
1 will be described. When the yarn Y is traversed starting from the point a in FIG. 2, the yarn Y moves in the traverse groove 11 from the point a to the branch portion SP as the traverse drum 6 rotates.
Passes through the groove L1 and reaches the point b. Then, it moves from the point b to the point c and from the point c to the point d, and reaches the left end of the traverse drum 6. That is, the traverse outward path 11F is constituted by the traverse groove 11 connecting the points a, b, c, and d. The traverse drum 6 is moved to 2.5 by the movement of the yarn Y to the left.
Since it is rotating, the number of drum winds on the traverse outward path 11F is 2.5W.

Further, the yarn Y moves in the traverse groove 11 from the point d to the point e, the point e to the point f, and the point f to the point a with the rotation of the traverse drum 6, and the right end of the traverse drum Reach That is, the traverse groove 11 connecting the points d, e, f, and a
This constitutes a traverse return path 11B. Since the traverse drum 6 rotates 2.5 times due to the movement of the yarn Y to the right, the number of drum winds on the traverse outward path 11F is 2.5W. From the above, during normal operation,
The traverse drum 6 is formed with traverse grooves having a forward path of 2.5 W and a backward path of 2.5 W.

Next, the traverse groove 11 during the ribbon winding diameter operation will be described with reference to FIG. When the yarn Y is traversed starting from the point a in FIG. 3, the yarn Y passes through the groove L2 from the point a through the branch portion SP through the traverse groove 11 as the traverse drum 6 rotates. up to g. Then, it moves from the point g to the point h and from the point h to the point i, and reaches the left end of the traverse drum 6. That is, the traverse outward path 11F is constituted by the traverse groove 11 connecting the points a, g, h, and i. By moving the yarn Y to the left, the traverse drum 6
Is rotating three times, so the traverse forward route 11
The number of drum winds of F is 3W.

Further, the yarn Y moves in the traverse groove 11 from the point i to the point j, the point j to the point k, and the point k to the point m in accordance with the rotation of the traverse drum 6, and the right end of the traverse drum. Reach That is, the traverse groove 11 connecting the points i, j, k, and m
This constitutes a traverse return path 11B. The traverse drum 6 rotates 2.5 times due to the rightward movement of the yarn Y, so that the traverse backward path 11B has a wind number of 2.
It is 5W. As a result, the yarn Y traverses once (reciprocating), but does not return to the point a and further traverses the second reciprocating.

The yarn Y traversed from the point m to the left again reaches the point n, moves from the point n to the point b, from the point b to the point c, and from the point c to the point d. Reach the left edge. In other words, the yarn Y that constitutes the 3W traverse forward path 11F connecting the points m, n, b, c, and d, and is further traversed from the point d to the right direction is composed of the points d, e, f, and a. 2.5W
It moves in the traverse return path 11B, reaches the right end of the traverse drum 6, and returns to the starting point a. From the above, during the ribbon winding diameter operation, the traverse drum 6 has the forward path 3W and the backward path 2.
Two reciprocating traverse grooves consisting of 5 W, 3 W on the outward path and 2.5 W on the return path are formed. The average number of drum winds during the ribbon winding diameter operation is (3W + 2.5W + 3W +
2.5W) / 4, which is 2.75W. As described above, in the automatic winder of this embodiment, the traverse drum 6 is formed with a plurality of (two in this embodiment) continuous traverse grooves 11 having different numbers of drum winds.

The above-described traverse groove 11 at the time of normal operation and ribbon winding diameter operation is branched at the branch portion SP, and switching of the traverse groove 11 at this branch portion SP is performed by the yarn defect detecting head 5 and the yarn defect detecting head 5. This is performed by a pin cylinder 24, which is a yarn path switching means, which is arranged in the yarn path between the traverse drum 6. Pin cylinder 24
Is configured to be switchable between on and off. In the on state, it projects to the position A in FIG. 1 to bend the yarn Y (the yarn path at this time is shown as Y1 in FIG. 1). As a result, the yarn Y is guided to the groove L1 side, and the normal operation of 2.5 W is performed on both the forward and backward paths. Further, in the off state, the pin cylinder 24 is pulled in, the tension on the yarn Y is released (the yarn path at this time is shown as Y2 in FIG. 1), and the yarn Y is in the groove L2.
Guided to the side, the ribbon winding diameter operation with an average wind number of 2.75 W is performed.

During normal operation in which ribbon winding does not occur, the pin cylinder 24 is turned on and the yarn Y is fed into the groove L1.
Side, and while the diameter of the package 3 is in the vicinity of the diameter where the ribbon winding occurs, the pin cylinder 24 is turned off to guide the yarn Y to the groove L2 side, and the traverse groove 11 during the ribbon winding diameter operation. Is used to shift the yarn path wound on the package 3 to prevent ribbon winding.

As described above, by forming a plurality of traverse grooves 11 having different wind numbers on the traverse drum 6 and appropriately switching the yarn paths according to the package diameter, the occurrence of ribbon winding is prevented. However, the yarn unwinding property in the subsequent process is improved. However, when the diameter of the package 3 becomes the same as or larger than the diameter of the traverse drum 6, even if the traverse groove 11 is switched to the side that prevents the occurrence of ribbon winding, the ribbon winding on the surface layer of the package 3 will occur. (Appearance ribbon) occurs.

Therefore, the ribbon winding prevention device of the present invention is configured as follows, and the appearance ribbon generated when the diameter of the package 3 becomes the same diameter as the diameter of the traverse drum 6 or doubles. We try to suppress the occurrence. That is, FIG.
As shown in FIG. 3, the support arms 22a of the cradle 22 for supporting the package 3 are provided on both left and right sides of the package 3.
.. 22a is arranged and the support arms 22a.
The package 3 is supported by fitting the support portions 22b, 22b at the tip of the a into the paper tube 3a of the package 3 from both left and right sides. The support portions 22b and 22b are rotatably provided with respect to the support arms 22a and 22a,
It rotates integrally with the package 3. A package brake 36 is provided at the tip of the support arm 22a on one side, and a rotation sensor 37 is provided at the tip of the support arm 22a on the other side.

The package brake 36 is the air pipe 3
By the air pressure supplied through 6a, it is possible to apply a load in the rotational direction to the support portion 22b of the support arm 22a on one side, and the operation of supplying the air pressure to apply the load to the support portion 22b. It is possible to switch between the state and the stopped state in which the air pressure is not supplied and the load is not applied to the support portion 22b. That is, when the package brake 36 is activated by the air supply, a load is applied to the one support portion 22b in the rotation direction, and the rotation of the package 3 is braked. The rotation sensor 37 is
The rotation speed of the package 3 can be detected by detecting the rotation state of the support portion 22b of the support arm 22a on the other side. The traverse drum 6 is rotationally driven by a drum motor 7, and the rotation speed of the traverse drum 6 is detected by a controller 15 which controls the operation of the drum motor 7.

In the ribbon winding prevention device thus constructed, the rotation speed of the package 3 is detected by the rotation sensor 37 from the beginning of winding the package 3 and is input to the controller 15. Then, the rotation speed of the package 3 and the rotation speed of the traverse drum 6 are compared, and when the rotation speed of the package 3 reaches the rotation speed of the traverse drum 6 and becomes half (the diameter of the package 3 is the traverse drum). When the diameter becomes 6 times the diameter of 6, the rotation speed of the package 3 becomes half of the rotation speed of the drum motor 7), and air is supplied to the package brake 36 by the control of the controller 15 to operate the package brake 36. .

When the package brake 36 is actuated, a load is applied in the rotating direction of the package 3 and the brake is applied. Therefore, the package 3 which is being driven and rotated by the frictional force at the contact surface with the traverse drum 6 is traversed. Slip against drum 6. When the package 3 slips with respect to the traverse drum 6, the phase between the package 3 and the traverse drum 6 is deviated, and as a result, the yarn path of the yarn Y wound on the package 3 is deviated. The appearance ribbon is prevented. Then, the package brake 36 stops after operating for a predetermined time or when the diameter of the package 3 exceeds the diameter range of the appearance ribbon, and the slip state of the package 3 with respect to the traverse drum 6 is released.

As described above, when the diameter of the package 3 becomes equal to or larger than the diameter of the traverse drum 6, the package brake 36 is operated to move the package 3 to the traverse drum 6.
On the other hand, by slipping, it is possible to prevent the appearance ribbon from being generated without constantly turning the drum motor 7 on and off, so that it is possible to reduce power consumption and turn off the drum motor 7. As a result, the yarn winding speed does not decrease, and the productivity can be improved. Also, the package 3 slips with respect to the traverse drum 6 because the diameter of the package 3
Since it takes only a short time when the diameter becomes equal to or larger than the diameter of the yarn, the yarn Y pain and fluff generation due to friction can be reduced, the quality of the package can be improved, and the twill deviation etc. It is also possible to reduce defective winding. Furthermore, since it is not necessary to separately provide a ribbon winding device, cost reduction can be achieved.

As a structure for detecting that the diameter of the package 3 is the same as or double the diameter of the traverse drum 6,
The following configuration can also be adopted. As shown in FIG. 4, a sensor lever 20 which is rotatable around a shaft 21 is disposed below the cradle 22. The sensor lever 20 is interlocked with the cradle 22, and both of them are the shaft 2
It is configured so as to integrally rotate about 1. Detection holes 20a and 20b for detecting the diameter of the package 3 are formed at the tip of the sensor lever 20, and at positions where the detection holes 20a and 20b overlap with the orbits of the detection holes 20a and 20b as the sensor lever 20 rotates. A proximity switch 23 is provided. The proximity switch 23 is turned on in the initial state,
It is configured so that it is switched off only while the detection hole 20a passes over the proximity switch 23.

Then, as the diameter of the package 3 increases, the cradle 22 rotates, and when the diameter of the package 3 reaches the diameter of the traverse drum 6, the detection hole 20a passes over the proximity switch 23. Is configured as
This turns off the proximity switch. When the proximity switch 23 is turned off, the package brake 36 described above operates and the package 3 slips on the traverse drum 6. When the detection hole 20a passes over the proximity switch 23 and leaves, the proximity switch 23 is turned on again, the package brake 36 stops, and the package 3
The slipped state of the traverse drum 6 is released.

Similarly, the diameter of the package 3 is the traverse drum 6
When the double diameter is reached, the proximity switch 23 passes over the detection hole 20b and is turned off. by this,
The package brake 36 operates and the package 3 slips on the traverse drum 6. Then, the detection hole 20
When b passes over the proximity switch 23 and leaves, the proximity switch 23 is turned on again, the package brake 36 stops, and the slip state of the package 3 with respect to the traverse drum 6 is released. In this way, it is possible to detect the operation timing of the package brake 36 using the sensor lever 21 and the proximity switch 23.

Further, the package 3 can be slipped with respect to the traverse drum 6 to prevent the appearance ribbon as described below. As shown in FIG. 4, the sensor lever 21
The shaft 21 that is the center of rotation of the rotary plate 2 is rotatable around the shaft 21 integrally with the cradle 22.
5 are provided. An upper end portion 26a of a cylinder 26 is attached to the rotating plate 25, and a lower end portion 26b of the cylinder 26 is fixed to a main body portion of the automatic winder. The cylinder 26 is configured to contract when air is supplied through the air pipe 26c.

In such a structure, when the rotational speed of the package 3 reaches the rotational speed of the traverse drum 6 and becomes half, the controller 2 controls the cylinder 2 to rotate.
Air is supplied to 6, the cylinder 26 contracts, and the rotating plate 25 rotates about the shaft 21. Rotating plate 2
When 5 rotates, the cradle 22 also rotates integrally.
In this case, the cradle 22 rotates in the direction in which the package 3 rotates upward (the direction in which the package 3 moves away from the traverse drum 6), and therefore the contact pressure of the package 3 on the traverse drum 6 becomes small. Package 3 is traverse drum 6
Since it is driven to rotate by the frictional force on the pressure contact surface with
When the contact pressure with the traverse drum becomes small, the traverse drum 6 slips.

When the package 3 slips on the traverse drum 6, the package 3 and the traverse drum 6 are out of phase with each other, and as a result, the yarn path of the yarn Y wound on the package 3 is displaced. As a result, the appearance ribbon is prevented. Then, the air supply to the cylinder 26 is stopped after a lapse of a predetermined time from the start of the supply or when the diameter of the package 3 exceeds the diameter range of the appearance ribbon, and the traverse drum 6 of the package 3 is stopped. The slip state for is canceled.

As described above, even when the contact pressure of the package 3 with respect to the traverse drum 6 is reduced by the cylinder 26 and the package 3 and the traverse drum 6 are slipped, the package brake 36 is used for slipping. It is possible to obtain the same effect as in the case of In addition, cylinder 2
When the contact pressure of the package 3 with respect to the traverse drum 6 is reduced by 6, the energy loss can be reduced as compared with the case where the package 3 is braked by using the package brake 36. Can be obtained.

[0035]

Since the present invention is constructed as described above, it has the following effects. That is, as described in claim 1, a traverse drum having a plurality of continuous traverse grooves having different numbers of winds traverses the yarn and winds the package into a package, and any traverse groove among the plurality of traverse grooves is wound. In a ribbon winding prevention device capable of appropriately switching whether a yarn is traversed by a groove, a package brake that applies a load in the rotation direction of the package is provided in a cradle that supports the package, and the package brake is appropriately timed. By operating, the package slips with respect to the traverse drum, so it is possible to prevent the appearance ribbon from being generated without constantly turning on and off the drum motor that rotationally drives the traverse drum. And the winding speed of the yarn decreases due to the drum motor being turned off. Ku, it is possible to improve the productivity. Also, the package slips with respect to the traverse drum only for a short time when the package brake is operating at an appropriate timing, so that the pain of yarn and the generation of fluff due to friction are reduced, and the package is reduced. It is possible to improve the quality of the wire and reduce the number of defective windings such as a twist. Furthermore, since it is not necessary to separately provide a ribbon winding device, cost reduction can be achieved.

Further, since the package brake operates when the rotation speed of the package reaches the same rotation speed as the traverse drum or half the rotation speed of the traverse drum, the minimum required at the timing when the appearance ribbon is generated. The package can be slipped on the traverse drum for a limited time, and the yarn pain and fluffing caused by friction can be reduced, improving the package quality and preventing defective winding such as traverse. It is possible to decrease.

Further, as described in claim 3, a traverse drum in which a plurality of continuous traverse grooves having different numbers of winds are formed, one of the traverse grooves is appropriately selected, and the package is traversed while the yarn is traversed. When the package reaches the same rotational speed as the traverse drum or half the rotational speed of the traverse drum while being wound up, a load is applied in the rotational direction of the package by the package brake provided in the cradle that supports the package, and the package is rotated. Since the traverse drum is slipped, it is possible to prevent the appearance ribbon from being generated without constantly turning on and off the drum motor that rotationally drives the traverse drum, so that it is possible to reduce power consumption. Improve productivity by preventing the yarn winding speed from decreasing due to the drum motor being turned off. It can be. Also, the package slips with respect to the traverse drum only for a short time when the package brake is operating at the time when the appearance ribbon is generated. And the quality of the package can be improved, and defective winding such as twisting can be reduced. Furthermore, since it is not necessary to separately provide a ribbon winding device, cost reduction can be achieved.

Further, as described in claim 4, the yarn is traversed by the traverse drum in which a plurality of continuous traverse grooves having different wind numbers are formed, and the yarn is wound into a package.
Of the plurality of traverse grooves, a ribbon winding prevention device capable of appropriately switching which traverse groove is used to traverse the yarn is provided with a contact pressure adjuster capable of adjusting the contact pressure of the traverse drum of the package, The contact pressure adjuster reduces the contact pressure of the package with respect to the traverse drum at an appropriate timing to cause the package to slip with respect to the traverse drum, so that the drum motor for rotating the traverse drum is always turned on / off. Since it is possible to prevent the appearance of ribbons, the power consumption can be kept low and the yarn winding speed does not decrease due to the drum motor being turned off, improving productivity. Can be made. Also, the package slips with respect to the traverse drum only for a short time when the package brake is operating at an appropriate timing, so that the pain of yarn and the generation of fluff due to friction are reduced, and the package is reduced. It is possible to improve the quality of the wire and reduce the number of defective windings such as a twist. Furthermore, since it is not necessary to separately provide a ribbon winding device, cost reduction can be achieved. Further, energy loss can be reduced as compared with the case where the package is braked by using the package brake, so that a further energy saving effect can be obtained.

Further, as described in claim 5, since the contact pressure adjuster is activated when the rotation speed of the package reaches the same rotation speed as the traverse drum or a half rotation speed, the appearance ribbon is generated at the timing. The package can be slipped against the traverse drum for the minimum necessary time, and the pain and fluffing of yarn due to friction is reduced,
It is possible to improve the quality of the package and reduce defective winding such as twisting.

Further, as described in claim 6, a traverse drum in which a plurality of continuous traverse grooves having different numbers of winds are formed, one of the traverse grooves is appropriately selected, and the package is traversed while the yarn is traversed. When the package rotation speed reaches the same rotation speed as the traverse drum or half of the traverse drum speed, the contact pressure adjuster that can adjust the contact pressure of the package traverse drum reduces the contact pressure. Since the package is slipped with respect to the traverse drum, it is possible to prevent the appearance ribbon from being generated without constantly turning on / off the drum motor that rotationally drives the traverse drum. In addition, the winding speed of the yarn does not decrease due to the drum motor being turned off, and the productivity can be improved. Also, the package slips with respect to the traverse drum only for a short time when the package brake is operating at the time when the appearance ribbon is generated. And the quality of the package can be improved, and defective winding such as twisting can be reduced. Furthermore, since it is not necessary to separately provide a ribbon winding device, cost reduction can be achieved. In addition, energy loss can be reduced compared to when the package is braked using the package brake.
Further energy saving effect can be obtained.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of an automatic winder including a ribbon winding prevention device of the present invention.

FIG. 2 is a development view of a traverse drum showing a yarn path during normal operation.

FIG. 3 is a development view of a traverse drum showing a yarn path during ribbon winding diameter operation.

FIG. 4 is a side view showing another embodiment of the automatic winder including the ribbon winding prevention device.

[Explanation of symbols]

3 winding package 6 traverse drum 11 traverse grooves 20 sensor lever 22 Cradle 23 Proximity switch 26 cylinders 36 Package brake 37 Rotation sensor

Claims (6)

[Claims] 1. A traverse drum in which a plurality of continuous traverse grooves having different numbers of winds are formed, the yarn is traversed and wound into a package, and the traverse groove is selected by any one of the traverse grooves. In a ribbon winding prevention device capable of appropriately switching whether to traverse, a package brake that applies a load in the rotation direction of the package is provided in a cradle that supports the package, and the package brake is operated at an appropriate timing. A ribbon winding prevention device characterized in that a package is slipped on a traverse drum. 2. The ribbon winding prevention device according to claim 1, wherein the package brake operates when the rotation speed of the package reaches the same rotation speed as the traverse drum or a half rotation speed of the traverse drum. 3. A traverse drum in which a plurality of continuous traverse grooves having different numbers of winds are formed, and any traverse groove is appropriately selected to wind the yarn around the package while traversing the yarn. When the rotational speed reaches the same rotational speed as the traverse drum or half the rotational speed, a load is applied in the rotational direction of the package by the package brake provided in the cradle that supports the package, and the package slips with respect to the traverse drum. A method for preventing ribbon winding, which comprises: 4. A traverse drum in which a plurality of continuous traverse grooves having different numbers of winds are formed, and the yarn is traversed and wound into a package, and the traverse groove of any of the plurality of traverse grooves is used. In a ribbon winding prevention device capable of appropriately switching whether to traverse the package, a contact pressure adjuster capable of adjusting the contact pressure of the package with respect to the traverse drum is provided, and the package traverse vibration is adjusted at an appropriate timing by the contact pressure adjuster. A ribbon winding prevention device, wherein a package is slipped on a traverse drum by reducing a contact pressure to the drum. 5. The ribbon winding prevention device according to claim 4, wherein the contact pressure adjuster operates when the rotation speed of the package reaches the same rotation speed as the traverse drum or half the rotation speed of the traverse drum. 6. A traverse drum in which a plurality of continuous traverse grooves having different numbers of winds are formed, and any traverse groove is appropriately selected to wind the yarn around the package while traversing the yarn. When the rotation speed reaches the same rotation speed or half the rotation speed as the traverse drum, the contact pressure adjuster capable of adjusting the contact pressure of the package to the traverse drum reduces the contact pressure to move the package to the traverse drum. A method for preventing ribbon winding, which comprises slipping against a ribbon.