JP2020203781A - Thread winding device and automatic winder - Google Patents

Abstract

To detect an occurrence of bar winding even if a traverse sensor or a thread speed sensor is not installed.SOLUTION: There is provided a thread winding device 2 configured to wind thread Y on a package P by traversing the thread Y while rotating a drum 32 that contacts a peripheral surface of the package P, and including a control unit 40 for determining whether or not bar winding has occurred in which the thread Y is intensively wound in a part of a traverse region based on the number of package winds, which indicates the number of rotations of the package P while traversing the thread Y a unit number of times.SELECTED DRAWING: Figure 2

Description

The present invention relates to a bobbin winder and an automatic winder.

For example, Patent Document 1 discloses a thread winding device configured to wind a thread around a package while traversing the thread by rotating a twill drum that comes into contact with the peripheral surface of the package. In such a thread winding device, for example, when the thread is spliced in a state where the thread wraps around the back side of the twill swing drum, the thread may not be properly traversed and a bar winding may occur. "Stick winding" means that the yarn is not normally traversed and the yarn is wound intensively in a part of the traverse area. Since the package in which the bar winding is formed is a defective product, it is desirable to detect the occurrence of the bar winding as soon as possible and take appropriate measures.

JP-A-2010-269915

Although the thread winding device of Patent Document 1 is configured to detect rotation defects of the package, no configuration is disclosed for detecting rod winding. In addition, some thread take-up devices are equipped with a traverse sensor that detects that the thread is traversed and a thread speed sensor (thread length sensor) that detects the running speed of the thread. With such a sensor, it is possible to detect the occurrence of bar winding, but the thread winding device without such a sensor could not detect the occurrence of bar winding.

The present invention has been made in view of the above problems, and an object of the present invention is to be able to detect the occurrence of bar winding even if a traverse sensor or a yarn speed sensor is not mounted.

The thread winding device according to the present invention is a thread winding device configured to wind the thread around the package by traversing the thread while rotating a drum in contact with the peripheral surface of the package. Control to determine whether or not there is a bar winding in which the yarn is intensively wound in a part of the traverse region based on the number of package winds indicating how many rotations of the package during traversing the unit number of times. It is characterized by having a part.

According to such a bobbin winder, the occurrence of bar winding can be detected as long as the number of package winds is obtained. The number of package winds can be calculated from the number of rotations of the package and the number of rotations of the drum, and a sensor for detecting these rotation speeds is generally mounted on a bobbin winder. Therefore, it is possible to detect the occurrence of bar winding even if the traverse sensor or the yarn speed sensor is not mounted.

In the present invention, the control unit may determine whether or not the bar winding has occurred based on the amount of decrease in the number of package winds in a predetermined time.

As will be described in detail later, the number of package winds changes drastically when bar winding occurs. Therefore, by using the amount of decrease in the number of package winds as a criterion for determining the occurrence of bar winding, it is possible to appropriately determine whether or not bar winding has occurred.

In the present invention, the control unit may determine that the bar winding has occurred when the amount of decrease in the number of package winds in the predetermined time exceeds a predetermined first threshold value.

As will be described in detail later, according to this configuration, when bar winding occurs on the large diameter side of the cone winding package, the occurrence of bar winding can be satisfactorily detected.

In the present invention, the control unit may determine that the bar winding has occurred when the amount of decrease in the number of package winds in the predetermined time is less than the predetermined second threshold value.

As will be described in detail later, according to this configuration, when bar winding occurs on the small diameter side of the cone winding package, the occurrence of bar winding can be satisfactorily detected.

In the present invention, it is preferable that an alarm unit is provided to notify the operator when the control unit determines that the bar winding has occurred.

By providing such an alarm unit, the operator can immediately grasp the occurrence of bar winding, so that it is possible to quickly respond when bar winding occurs.

In the present invention, when the control unit determines that the bar winding has occurred, it is preferable to stop the winding of the thread on the package.

According to this configuration, the amount of yarn wound around the package in the rod-wound state can be minimized.

In the present invention, it is preferable to wind the yarn in a cone winding package in which the winding diameter gradually increases or decreases in the axial direction.

As will be described in detail later, when the package is a cone-wound package, the rotation speed of the package changes particularly rapidly when bar winding occurs, so that the occurrence of bar winding can be detected accurately. ..

In the present invention, the drum may be a twill drum having a twill groove for traversing the thread formed on the peripheral surface.

The number of winds of the Ayashin drum is determined by the type of drum and does not change during the winding of the thread. Therefore, when using a twill drum, the number of package winds can be easily obtained.

The automatic winder according to the present invention is characterized in that a plurality of the above-mentioned thread winding devices are arranged.

According to such an automatic winder, the occurrence of bar winding can be detected even if each thread winding device is not equipped with a traverse sensor or a thread speed sensor.

It is a schematic block diagram of the automatic winder which concerns on this embodiment. It is a front view of a winding unit. It is a schematic side view which shows the winding state of a thread. It is a graph which shows the transition of the number of package winds at the time of normal winding. It is a graph which shows the transition of the decrease amount of the number of package winds at the time of normal winding. It is a schematic front view which shows the winding state of a thread. It is a graph which shows the transition of the decrease amount of the number of package winds at the time of bar winding occurrence. It is a graph which shows the transition of the decrease amount of the package wind number, and the threshold value.

Hereinafter, an example of the embodiment of the present invention will be described with reference to the drawings.

(Automatic winder)
FIG. 1 is a schematic configuration diagram of an automatic winder according to the present embodiment. As shown in FIG. 1, the automatic winder 1 can freely travel along the arrangement directions of the plurality of winding units 2 (corresponding to the thread winding device of the present invention) arranged in one direction and the plurality of winding units 2. The ball lifting device 3 and the machine stand control device 4 provided in the above are provided. In the following, as shown in FIG. 1, the arrangement direction of the plurality of winding units 2 is the horizontal direction, and the direction orthogonal to both the horizontal direction and the vertical direction (the vertical direction on the paper surface of FIG. 1) is the front-rear direction. The front-back direction will be described with the front side in the vertical direction of the paper as the front side and the back side as the rear side.

The automatic winder 1 winds the yarn Y unwound from the yarn feeding bobbin B in each winding unit 2 to form the package P. When the package P is completed in a certain winding unit 2, the ball lifting device 3 moves to the winding unit 2, collects the completed package P, and replaces it with an empty winding pipe. The machine stand control device 4 controls the entire automatic winder 1 and emits a control signal to each take-up unit 2 and the ball lifting device 3.

(Taking unit)
FIG. 2 is a front view of the take-up unit 2. The take-up unit 2 winds the yarn Y unwound from the yarn feed bobbin B on the take-up pipe Q while traversing it to form the package P. The take-up unit 2 is various with respect to the yarn feeding portion 10 that holds the yarn Y of the yarn feeding bobbin B in a supplyable state and the yarn Y that is unwound from the yarn feeding bobbin B held by the yarn feeding portion 10. The yarn processing unit 20 that performs various processing, the winding unit 30 that winds the yarn Y processed by the yarn processing unit 20 on the winding pipe Q to form the package P, and these units 10, 20, and 30 are controlled. It includes a unit control unit 40 (corresponding to the control unit of the present invention). The thread feeding section 10, the thread processing section 20, and the winding section 30 are arranged side by side in this order from bottom to top.

The yarn feeding unit 10 has a bobbin holding unit 11 for holding the yarn feeding bobbin B, and an unwinding assisting device 12 for assisting the unwinding of the yarn Y from the yarn feeding bobbin B. The unwinding assist device 12 has a tubular body 13 that covers the thread feeding bobbin B from above. The tubular body 13 is configured to be raised and lowered by an elevating device (not shown). In the unwinding assisting device 12, as the unwinding of the thread Y progresses, the tubular body 13 is lowered to regulate the swelling (balloon) of the thread Y during unwinding and stabilize the tension of the thread Y.

The winding unit 30 has a cradle 31 that supports the package P (winding tube Q) and a twill drum 32 (corresponding to the drum of the present invention) that traverses the thread Y. The cradle 31 rotatably supports both ends of the package P. The twill drum 32 is in contact with the peripheral surface of the package P and is rotationally driven by the drum motor 33. A twill groove 32a is formed on the peripheral surface of the twill drum 32, and the thread Y is traversed by rotating the twill drum 32 with the thread Y located in the twill groove 32a. When the twill drum 32 rotates in contact with the package P, the package P is driven to rotate, and the thread Y traversed by the twill drum 32 is wound around the package P.

The take-up unit 30 is further provided with a drum rotation sensor 34 for detecting the rotation speed of the twill swing drum 32 and a package rotation sensor 35 for detecting the rotation speed of the package P. The drum rotation sensor 34 and the package rotation sensor 35 are composed of, for example, a proximity sensor. The values detected by the drum rotation sensor 34 and the package rotation sensor 35 are transmitted to the unit control unit 40.

The thread processing unit 20 includes a tension applying device 21, a thread splicing device 22, a yarn clearer 23, a bobbin thread catching guide member 24, and a needle thread catching guide member 25.

The tension applying device 21 applies a predetermined tension to the traveling thread Y. In FIG. 2, a so-called gate type tension applying device 21 is shown as an example. In the gate type tension applying device 21, a plurality of fixed gate bodies 21a and a plurality of movable gate bodies 21b are alternately arranged in the vertical direction. Then, by adjusting the horizontal positions of the plurality of movable gate bodies 21b, a predetermined tension is applied to the thread Y running between the fixed gate body 21a and the movable gate body 21b.

In the yarn splicing device 22, when a yarn defect is detected by the yarn clearer 23 described later and the yarn Y is cut by the cutter 23a, when the yarn Y is broken during winding, or when the yarn Y of the yarn feeding bobbin B is cut. When the thread feeding bobbin B is lost and replaced, the thread Y (bobbin thread Y) on the thread feeding bobbin B side (thread feeding section 10 side) and the thread on the package P side (winding section 30 side) are separated. Y (upper thread Y) is spliced.

On the lower and upper sides of the thread splicing device 22, a bobbin thread catching guide member 24 that captures the bobbin thread Y and guides it to the thread splicing device 22 and a needle thread that captures the needle thread Y and guides it to the thread splicing device 22. A capture guide member 25 is provided, respectively. The bobbin thread catching guide member 24 is rotatable about a shaft 24a and is rotated and driven by a motor (not shown) to rotate up and down. The bobbin thread catching guide member 24 has a suction portion 24b at its tip that sucks and catches the thread end of the bobbin thread Y. The needle thread capture guide member 25 can rotate about the shaft 25a, and is rotated and driven by a motor (not shown) to rotate up and down. The needle thread catching guide member 25 has a suction portion 25b at its tip that sucks and catches the thread end of the needle thread Y.

When thread splicing is performed by the thread splicing device 22, the bobbin thread catching guide member 24 guides the bobbin thread Y to the thread splicing device 22, and the needle thread catching guide member 25 guides the needle thread Y to the thread splicing device 22. Specifically, the bobbin thread catching guide member 24 sucks and catches the thread end of the bobbin thread Y by the suction unit 24b, and then turns upward to guide the bobbin thread Y to the thread splicing device 22. Further, the needle thread capture guide member 25 first swivels upward, and by locating the suction portion 25b near the contact point between the package P and the twill swing drum 32, the upper thread capture guide member 25 is attached to the surface of the package P by the suction portion 25b. The thread end of the thread Y is sucked and captured. Then, the needle thread catching guide member 25 guides the needle thread Y to the thread joint device 22 by turning from the upper side to the lower side. The thread splicing device 22 connects the thread end of the bobbin thread Y guided by the bobbin thread catching guide member 24 and the thread end of the needle thread Y guided by the needle thread capturing guide member 25 to form one thread. Set to Y.

The yarn clearer 23 constantly acquires information on the thickness of the traveling thread Y, and based on the information on the thickness of the thread Y, an abnormal portion in which the thickness contained in the thread Y is thicker than a certain level is regarded as a thread defect. To detect. Further, a cutter 23a is attached to the yarn clearer 23, and when a thread defect is detected in the yarn clearer 23, the cutter 23a immediately cuts the thread Y. Then, after removing the portion of the thread defect, the thread splicing device 22 performs the thread splicing.

The take-up unit 2 is provided with an alarm unit 41. The alarm unit 41 is for informing the operator that an abnormality has occurred in the take-up unit 2. The alarm unit 41 of the present embodiment is composed of a lamp that transmits an abnormality by blinking or lighting a light and / or a speaker that transmits an abnormality by voice, but the configuration of the alarm unit 41 is not limited to these. Absent.

(Occurrence of stick winding)
FIG. 3 is a schematic side view showing the winding state of the yarn Y. FIG. 3a shows a state in which the thread Y is normally wound, and FIG. 3b shows a state in which the thread Y is wound in a rod. When the thread Y is normally wound, as shown in FIG. 3A, the thread Y is wound around the package P while traveling in the twill groove 32a formed in the twill drum 32. Be done. Therefore, the thread Y is appropriately traversed by the twill drum 32, and the package P having a desired shape is formed.

However, for example, when the thread Y is sewn around the back side (lower side) of the twill swing drum 32 and the thread splicing is performed, as shown in FIG. 3B, the thread Y Does not travel in the twill groove 32a, and the thread Y is not traversed. Then, "bar winding" occurs in which the thread Y is wound intensively on a part of the traverse area. Since the package P on which the bar winding is formed is a defective product, it is desirable to detect the occurrence of the bar winding as soon as possible and take appropriate measures. Therefore, in the present embodiment, the bar winding is detected by the following method.

(Detection of bar winding)
For each of the twill drum 32 and the package P, there is a parameter called the wind number. The number of winds indicates how many rotations of the twill drum 32 and the package P are each while traversing the thread Y a unit number of times, that is, while moving the thread Y from one end to the other end of the traverse region once. The number of winds of the twill drum 32 (hereinafter referred to as the number of drum winds) is a constant value determined by the type of the twill drum 32, and does not change while winding the thread Y. On the other hand, the number of winds of the package P (hereinafter, the number of package winds) decreases as the diameter of the package P increases.

FIG. 4 is a graph showing the transition of the number of package winds at the time of normal winding. FIG. 5 is a graph showing the transition of the decrease in the number of package winds at the time of normal winding. The “amount of decrease in the number of winds” in FIG. 5 indicates how much the number of package winds decreased in 10 seconds. When the thread Y is normally wound, the diameter of the package P increases with the passage of time, and the number of rotations of the package P during one rotation of the twill drum 32 decreases. Therefore, as shown in FIG. 4, the number of package winds gradually decreases. As shown in FIG. 5, the amount of decrease in the number of package winds gradually decreases (the pace of decrease slows down) over a long period of time while repeating slight increases and decreases. This is because as the diameter of the package P increases, the pace of increase in the diameter of the package P slows down.

In the present embodiment, the unit control unit 40 is configured to determine whether or not bar winding has occurred based on the amount of decrease in the number of package winds. Regarding the principle that bar winding can be detected based on the amount of decrease in the number of package winds, the case where the package P is a cone winding package (a truncated cone-shaped package in which the winding diameter gradually increases or decreases in the axial direction) is taken as an example, and FIG. And FIG. 7 will be described with reference to FIG.

FIG. 6 is a schematic front view showing the winding state of the yarn Y. FIG. 6A shows a state in which the thread Y is normally wound, and FIG. 6B shows a state in which bar winding B1 is generated at the end of the cone winding package P on the large diameter side. FIG. 6C of FIG. 6 shows a state in which the bar winding B2 is generated at the end portion of the cone winding package P on the small diameter side. FIG. 7 is a graph showing the transition of the amount of decrease in the number of package winds when bar winding occurs. FIG. 7a shows a case where bar winding occurs on the large diameter side of the cone winding package P, and FIG. 7b shows a case where bar winding occurs on the small diameter side of the cone winding package P.

As shown in FIG. 6a, when the yarn Y is normally wound and the rod winding is not generated, the package P having a desired shape is formed. At this time, the package P is in contact with the twill drum 32 in almost the entire axial direction (traverse direction). However, strictly speaking, the contact pressure differs depending on the position in the axial direction, and the contact pressure becomes maximum in the central region C in the axial direction. The package P is rotated by the rotational driving force of the twill drum 32, and the rotational driving force is transmitted to the package P via the central region C where the contact pressure is maximized. That is, the number of rotations of the package P and the number of package winds are determined by the diameter Pd of the central region C. The central region C where the contact pressure is maximized is determined by the relationship with the position of the center of gravity of the package P, and does not necessarily coincide exactly with the axial center of the package P.

Assuming that the number of package winds is Pw, the number of drum winds is Dw, and the diameter of the Ayashin drum 32 is Dd,
Pw = Dw × Dd / Pd ... Equation (1)
Is.
Further, assuming that the rotation speed of the package P is Pr and the rotation speed of the twill drum 32 is Dr, the peripheral speed of the package P and the peripheral speed of the twill drum 32 are equal.
Pd × Pr = Dd × Dr ... Equation (2)
Is.
From the equations (1) and (2), the following equation (3) holds.
Pw = Dw × Pr / Dr ... Equation (3)

As described above, the drum wind number Dw is a constant value determined by the type of the twill drum 32. Therefore, if the rotation speed Pr of the package P and the rotation speed Dr of the twill drum 32 are known, the package wind number Pw is an equation. It can be calculated from (3). As described above, the winding unit 2 is provided with a drum rotation sensor 34 for detecting the rotation speed Dr of the twilling drum 32 and a package rotation sensor 35 for detecting the rotation speed Pr of the package P. Therefore, it is possible to calculate the number of package winds Pw without adding a new sensor. Regarding the number of drum winds Dw, the unit control unit 40 acquires the number of drum winds Dw based on the type of the twill swing drum 32 input by the operator.

Next, how the number of package winds changes when a bar winding occurs in the package P will be described. As shown in FIG. 6b, when the bar winding B1 occurs at the end of the cone winding package P on the large diameter side, the contact pressure becomes maximum in the forming region A1 of the bar winding B1. Therefore, the position where the rotational driving force is transmitted from the twilling drum 32 to the package P moves from the central region C to the formation region A1 on the large diameter side. In this way, by moving the transmission position of the rotational driving force to the large diameter side at once, the rotation speed of the package P during one rotation of the twill drum 32 sharply decreases, and further, the number of package winds sharply decreases. Decrease. That is, when the bar winding B1 occurs on the large diameter side of the cone winding package P, the amount of decrease in the number of package winds rapidly increases as shown in FIG. 7a.

On the other hand, as shown in FIG. 6C, when the bar winding B2 occurs at the end of the cone winding package P on the small diameter side, the contact pressure becomes maximum in the forming region A2 of the bar winding B2. Therefore, the position where the rotational driving force is transmitted from the twill drum 32 to the package P moves from the central region C to the small diameter side forming region A2. In this way, by moving the transmission position of the rotational driving force to the small diameter side at once, the rotation speed of the package P during one rotation of the twill drum 32 sharply increases, and further, the number of package winds sharply increases. To do. That is, when the bar winding B2 occurs on the small diameter side of the cone winding package P, the amount of decrease in the number of package winds sharply decreases as shown in FIG. 7b. The fact that the amount of decrease in the number of package winds is a negative value means that the number of package winds is increasing.

Such a rapid increase or decrease in the amount of decrease in the number of package winds is due to a rapid change in the number of revolutions of the package P. Therefore, it seems that the bar winding can be detected only by monitoring the rotation speed of the package P. However, the rotation speed of the twill drum 32 is intentionally changed during the winding of the thread Y for the purpose of suppressing the occurrence of ribbon winding (a phenomenon in which the thread Y is wound on the peripheral surface of the package P in the same trajectory). May be done. When the rotation speed of the twill drum 32 is changed, the rotation speed of the package P also changes accordingly. Therefore, if only the rotation speed of the package P is monitored to detect the rod winding, there is a risk of erroneously detecting that the rod winding has occurred even when the rotation speed of the twill drum 32 is intentionally changed. There is. In this regard, if the number of package winds, which also takes into account the rotation speed of the twill drum 32, is monitored, the accuracy of bar winding detection can be improved.

FIG. 8 is a graph showing the transition of the decrease in the number of package winds and the threshold value. FIG. 8a shows the amount of decrease and the threshold value of the number of package winds at the time of normal winding, and FIG. 8b shows the amount of decrease and the threshold value of the number of package winds at the time of bar winding. The first threshold value is a threshold value for detecting that the amount of decrease in the number of package winds has increased sharply, that is, that bar winding has occurred on the large diameter side of the cone winding package P, and the package at the time of normal winding. A value larger than the amount of decrease in the number of winds is set. On the other hand, the second threshold value is a threshold value for detecting that the amount of decrease in the number of package winds has decreased sharply, that is, that bar winding has occurred on the small diameter side of the cone winding package P, and is a threshold value at the time of normal winding. A value smaller than the amount of decrease in the number of package winds is set. In the example shown in FIG. 8, the first threshold value is set to a plurality of stages according to the transition of the decrease amount of the number of package winds at the time of normal winding, and the second threshold value is set to a constant value. The first threshold value and the second threshold value store values determined in advance in consideration of the thread count and the like, but may be configured so that they can be set by the operator. The unit control unit 40 stores the first threshold value and the second threshold value.

The unit control unit 40 has a rotation speed Dr of the twill drum 32 detected by the drum rotation sensor 34 and a rotation speed Pr of the package P detected by the package rotation sensor 35 at predetermined time intervals (for example, every 2 seconds). And the number of drum winds Dw, the number of package winds Pw is obtained, and the amount of decrease in the number of package winds Pw in 10 seconds is calculated. Then, the calculated decrease in the number of package winds Pw is compared with the first threshold value and the second threshold value. When the amount of decrease in the number of package winds Pw exceeds the first threshold value, it is determined that bar winding has occurred on the large diameter side of the cone winding package P, the alarm unit 41 is operated, and the thread Y is wound. To stop. If the amount of decrease in the number of package winds Pw is less than the second threshold value, it is determined that bar winding has occurred on the small diameter side of the cone winding package P, the alarm unit 41 is activated, and the thread Y is wound. Stop it. When the amount of decrease in the number of package winds Pw is equal to or greater than the second threshold value and equal to or less than the first threshold value, it is determined that the yarn Y is normally wound, and the winding of the yarn Y is continued.

As shown in FIG. 8b, when the first threshold value and the second threshold value are actually applied, all the remaining bar windings are detected except for the first bar winding generated on the small diameter side of the cone winding package P. We were able to. Of course, if the second threshold value is set a little larger, the first bar winding can be detected, and by appropriately adjusting the first threshold value and the second threshold value, the bar winding detection accuracy can be improved. .. Further, in the present embodiment, the first threshold value is set in a plurality of stages and the second threshold value is set to a constant value, but how the first threshold value and the second threshold value are set is free. For example, the first threshold value and the second threshold value may be set to gradually decrease along with the transition of the decrease amount of the number of package winds at the time of normal winding.

By the way, when bar winding occurs in the central region C (or its vicinity) of the cone winding package P, the twill swing drum 32 is similar to the case where bar winding occurs on the large diameter side and the small diameter side of the cone winding package P. The transmission position of the rotational driving force from the to the package P does not move at once. Therefore, when the bar winding occurs in the central region C of the cone winding package P, the amount of decrease in the number of package winds does not change sharply as shown in FIG. 7, and it is difficult to detect the bar winding. However, in the case of the cone winding package P, the rod winding is often biased to either the large diameter side or the small diameter side, so even if the occurrence of the rod winding in the central region C cannot be detected, it is not so problematic. Must not be.

(effect)
The winding unit 2 of the present embodiment includes a unit control unit 40 that determines whether or not bar winding has occurred based on the number of package winds. According to such a winding unit 2, the occurrence of bar winding can be detected as long as the number of package winds is obtained. The number of package winds can be calculated from the number of rotations of the twill swing drum 32 and the number of rotations of the package P, and the sensors (drum rotation sensor 34 and package rotation sensor 35) for detecting these rotation speeds are winding units. It is generally mounted on 2. Therefore, it is possible to detect the occurrence of bar winding even if the traverse sensor or the yarn speed sensor is not mounted.

In the winding unit 2 of the present embodiment, the unit control unit 40 determines whether or not bar winding has occurred based on the amount of decrease in the number of package winds in a predetermined time (10 seconds). As described above, the number of package winds changes abruptly when bar winding occurs. Therefore, by using the amount of decrease in the number of package winds as a criterion for determining the occurrence of bar winding, it is possible to appropriately determine whether or not bar winding has occurred.

In the winding unit 2 of the present embodiment, the unit control unit 40 determines that bar winding has occurred when the amount of decrease in the number of package winds in a predetermined time exceeds a predetermined first threshold value. According to this configuration, when the bar winding occurs on the large diameter side of the cone winding package P, the occurrence of the bar winding can be satisfactorily detected.

In the winding unit 2 of the present embodiment, the unit control unit 40 determines that bar winding has occurred when the amount of decrease in the number of package winds in a predetermined time is less than a predetermined second threshold value. According to this configuration, when the bar winding occurs on the small diameter side of the cone winding package P, the occurrence of the bar winding can be satisfactorily detected.

The winding unit 2 of the present embodiment is provided with an alarm unit 41 that notifies the operator when it is determined by the unit control unit 40 that rod winding has occurred. By providing such an alarm unit 41, the operator can immediately grasp the occurrence of bar winding, so that it is possible to quickly respond when bar winding occurs.

In the winding unit 2 of the present embodiment, when the unit control unit 40 determines that the rod winding has occurred, the unit control unit 40 stops the winding of the thread Y to the package P. According to this configuration, the amount of the yarn Y wound around the package P in the rod-wound state can be minimized.

In the winding unit 2 of the present embodiment, the yarn Y is wound around the cone winding package P whose winding diameter gradually increases or decreases in the axial direction. As described above, when the package P is a cone-wound package, the number of rotations of the package P changes as the position where the rotational driving force is transmitted from the twilling drum 32 to the package P changes when the bar winding occurs. Is particularly abruptly changed, so that the occurrence of bar winding can be detected accurately.

In the winding unit 2 of the present embodiment, the drum of the present invention is a twill drum 32 in which a twill groove 32a for traversing the thread Y is formed on the peripheral surface. The number of winds of the twill drum 32 is determined by the type of drum and does not change during winding of the thread Y. Therefore, when the twill drum 32 is used, the number of package winds can be easily obtained.

(Other embodiments)
A modified example in which various changes are made to the above embodiment will be described.

In the above embodiment, it is determined whether or not bar winding has occurred based on the amount of decrease indicating how much the number of package winds has decreased in 10 seconds. However, the amount of decrease in the number of package winds is not limited to the amount of decrease for 10 seconds, and can be changed as appropriate. In addition, the numerical value used to determine whether or not bar winding has occurred is not limited to the amount of decrease in the number of package winds, and other numerical values related to the number of package winds such as the number of package winds themselves and the differential value of the number of package winds can be used. You may use it.

In the above embodiment, the unit control unit 40 determines whether or not bar winding has occurred. However, the main body for determining whether or not bar winding has occurred is not limited to the unit control unit 40, and for example, the machine base control device 4 may perform the determination.

In the above embodiment, when it is determined that the bar winding has occurred, the alarm unit 41 is activated and the winding of the thread Y by the winding unit 2 is stopped. However, the operation executed by the take-up unit 2 when it is determined that the bar winding has occurred is not limited to this.

In the above embodiment, the case where the package P is a cone-wound package has been described. However, it is also possible for the package P to apply the present invention to a cheese-wrapped package (cylindrical package). In this case, as in the case of the cone winding package, the diameter does not change abruptly even if the position of transmission of the rotational driving force changes, so that normal winding and bar winding occur compared to the case of the cone winding package. Although the set value of the threshold value for distinguishing from time is severe, it is also possible to adopt the same method as in the above embodiment.

In the above embodiment, the drum of the present invention is a twill drum 32. However, for example, the configuration of the winding unit described in JP-A-2019-59601 may be adopted. In this case, the touch roller of the above publication functions as the drum of the present invention, and an arm-type traverse device is provided separately from the drum.

1: Automatic winder 2: Winding unit (thread winding device)
32: Aya swing drum (drum)
32a: Twill groove 40: Unit control unit (control unit)
41: Alarm part Y: Thread P: Package

Claims (9)

A thread winding device configured to wind the thread around the package by traversing the thread while rotating a drum that contacts the peripheral surface of the package.
Based on the number of package winds indicating how many rotations of the package are made while traversing the yarn a unit number of times, it is determined whether or not there is a bar winding in which the yarn is intensively wound in a part of the traverse region. A thread winding device characterized by being provided with a control unit. The thread winding device according to claim 1, wherein the control unit determines whether or not the bar winding has occurred based on the amount of decrease in the number of package winds in a predetermined time. The second aspect of claim 2, wherein the control unit determines that the bar winding has occurred when the amount of decrease in the number of package winds in the predetermined time exceeds a predetermined first threshold value. Thread take-up device. The second or third claim is characterized in that the control unit determines that the bar winding has occurred when the amount of decrease in the number of package winds in the predetermined time is less than the predetermined second threshold value. The thread winding device described. The invention according to any one of claims 1 to 4, wherein an alarm unit is provided to notify the operator when the control unit determines that the pincushion has occurred. Thread take-up device. The thread winding device according to any one of claims 1 to 5, wherein when the control unit determines that the bar winding has occurred, the winding of the thread to the package is stopped. .. The thread winding device according to any one of claims 1 to 6, wherein the thread is wound in a cone winding package in which the winding diameter gradually increases or decreases in the axial direction. The thread winding device according to any one of claims 1 to 7, wherein the drum is a twill drum in which a twill groove for traversing the thread is formed on a peripheral surface. An automatic winder according to any one of claims 1 to 8, wherein a plurality of thread winding devices are arranged.

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