JP2023055344A - Package, package manufacturing method and yarn winding device - Google Patents

Abstract

To reduce unwinding tension when unwinding a package.SOLUTION: A package 100 of the present disclosure includes a cone-shaped winding tube 120 and a thread layer 110. The winding tube 120 has a tapered winding surface inclined from a central axis C by a first angle θ. The thread layer 110 is obtained by winding yarn so that a winded surface is formed having the same inclination as the winding surface of the winding tube 120. The thread layer 110 includes: a first thread layer 111 being in contact with the winding tube 120 and having a first traverse width W1; a second thread layer 112 being on the first thread layer 111 and having a second traverse width W2 that decreases with the increase in distance from the first thread layer 111; and a third thread layer 113 being on the second thread layer 112 and having a third traverse width W3. The first traverse width W1 satisfies a relation of W1×1/2≤W3≤W1×2/3 with respect to the third traverse width W3 .SELECTED DRAWING: Figure 2

Description

The present disclosure relates to a package, a package manufacturing method, and a yarn winding device.

2. Description of the Related Art A cone winding package is known in which a yarn layer is formed by winding a yarn using a yarn winding device on the surface of a winding tube having a tapered winding surface. A yarn winding device for producing a cone-wound package traverses the yarn while rotating the winding tube to form a yarn layer over the traverse width. Such yarn winding devices include an arm traverse type winding device (Patent Document 1) and a belt traverse type winding device (Patent Document 2).

JP 2009-214984 A JP 2007-161449 A

A conventional cone-wound package has a problem that when unwinding the yarn of the package, the unwinding tension increases as the package diameter increases, and yarn breakage occurs in the process of unwinding the yarn of the package. rice field.

An object of the present disclosure is to provide a package with little change in unwinding tension regardless of the size of the package diameter.

The package of this disclosure is
a cone-shaped winding tube having a tapered winding surface inclined at a first angle from the central axis;
and a yarn layer in which yarn is wound such that a winding surface having the same inclination as the winding surface is formed. The yarn layer comprises a first yarn layer in contact with the winding tube and having a first traverse width W1 and a second traverse width W2 on the first yarn layer that decreases with distance from the first yarn layer. and a third thread layer on the second thread layer and having a third traverse width W3. The first traverse width W1 satisfies the following relationship with the third traverse width W3.
W1×1/2≦W3≦W1×2/3

The package of the present disclosure has a third yarn layer with a narrow traverse width on the outermost surface, and can prevent an increase in unwinding tension when the package diameter is large. As a result, when the package diameter is small and the unwinding tension does not matter, the yarn winding amount is not reduced, and when the package diameter is large and the unwinding tension is high, the yarn winding amount is reduced. It prevents the release tension from becoming high. Regardless of the size of the package diameter, the change in unwinding tension can be reduced, and the rate of decrease in the amount of yarn wound as a package can be minimized.

The thickness T3 of the third thread layer is thicker than the thickness T2 of the second thread layer, and the thickness T3 of the third thread layer is thicker than the thickness T1 of the first thread layer.

The first traverse width W1 of the first yarn layer is constant regardless of the distance from the winding tube, or decreases as the distance from the winding tube increases, and the second yarn layer The first traverse width W1e of the first yarn layer adjacent to the winding tube may be 90% or more of the first traverse width W1s of the first yarn layer adjacent to the winding tube.

The second traverse width W2e of the second yarn layer adjacent to the third yarn layer is 50% or more and 90% or less of the second traverse width W2s of the second yarn layer adjacent to the first yarn layer good too.

The third traverse width W3 of the third yarn layer is constant regardless of the distance from the winding tube, or decreases as the distance from the second yarn layer increases. The third traverse width W3e of the outer surface of the layer may be 90% or more of the third traverse width W3s of said third yarn layer adjacent to said second yarn layer.

The first traverse width W1e of the first thread layer adjacent to the second thread layer may be equal to the second traverse width W2s of the second thread layer adjacent to the first thread layer.

The second traverse width W2e of the second thread layer adjacent to the third thread layer may be equal to the third traverse width W3s of the third thread layer adjacent to the second thread layer. In other words, the traverse width of the yarn layer may be continuous.

The thickness T1 of the first thread layer may be thicker than the thickness T2 of the second thread layer.

The end face of each thread layer on the small diameter side of the cone-shaped winding tube is defined as the small diameter side end face of each thread layer, and the end face of each thread layer on the large diameter side of the cone-shaped winding tube is defined as the large diameter end face of each thread layer. The large-diameter side end surface of the third thread layer is formed perpendicular to the winding surface of the cone-shaped winding tube when viewed in a cross-sectional view passing through the center line of the cone-shaped winding tube when viewed as a side end surface. may have been

The end face of each thread layer on the small diameter side of the cone-shaped winding tube is defined as the small diameter side end face of each thread layer, and the end face of each thread layer on the large diameter side of the cone-shaped winding tube is defined as the large diameter end face of each thread layer. Inclination angle of the large-diameter side end surface or the small-diameter side end surface of the second thread layer with respect to the direction perpendicular to the winding surface when viewed as a side end surface and viewed in a cross-sectional view passing through the center line of the cone-shaped winding tube may change along the way.

The end face of each thread layer on the small diameter side of the cone-shaped winding tube is defined as the small diameter side end face of each thread layer, and the end face of each thread layer on the large diameter side of the cone-shaped winding tube is defined as the large diameter end face of each thread layer. When viewed as a side end face and viewed in a cross-sectional view passing through the center line of the cone-shaped winding tube, the inclination angle of the large diameter side end face of the second yarn layer with respect to the direction perpendicular to the winding surface is the large diameter The angle of inclination of the side end surface with respect to the direction perpendicular to the winding surface may be different.

A package manufacturing method of the present disclosure includes the steps of preparing a cone-shaped winding tube having a tapered winding surface inclined at a first angle from a central axis;
forming a yarn layer by winding the yarn so that a winding surface having the same inclination as the winding surface is formed;
Prepare. The step of forming the thread layer includes:
(a) forming a first yarn layer on the winding tube with a first traverse width W1;
(b) forming a second yarn layer on the first yarn layer with a second traverse width W2 that gradually decreases;
(c) forming a third thread layer on the second thread layer with a third traverse width W3;
Prepare.
The first traverse width W1 satisfies the following relationship with the third traverse width W3.
W1×1/2≦W3≦W1×2/3

In the manufacturing method of the package,
The thickness T3 of the third thread layer is thicker than the thickness T2 of the second thread layer,
The thickness T3 of the third thread layer is thicker than the thickness T1 of the first thread layer.

A yarn winding device of the present disclosure includes a cone-shaped winding tube having a tapered winding surface inclined at a first angle from a central axis, and winding a yarn so as to form a winding surface inclined at the same inclination as the winding surface. and a wound yarn layer. The yarn winding device
a traversing yarn guide that traverses the yarn wound on the winding tube;
a traverse yarn guide drive unit for driving the traverse yarn guide;
A control section for controlling the traverse yarn guide driving section is provided.
The control unit
(a) forming a first yarn layer on the winding tube with a first traverse width W1;
(b) forming a second yarn layer on the first yarn layer with a second traverse width W2 that gradually decreases;
(c) forming a third thread layer on the second thread layer with a third traverse width W3;
control. The first traverse width W1 satisfies the following relationship with the third traverse width W3.
W1×1/2≦W3≦W1×2/3

The control unit, depending on the control mode,
The thickness T3 of the third thread layer is thicker than the thickness T2 of the second thread layer,
The thickness T3 of the third thread layer is made thicker than the thickness T1 of the first thread layer.

With the package of the present disclosure, the unwinding tension can be relatively small even when the package diameter is large. Therefore, it is possible to reduce the maximum value of the tension when the package is unwound, and to reduce the damage to the yarn.

1 is a diagram showing a configuration of a yarn winding device 10; FIG. 2 is a diagram for explaining the configuration of the package 100; FIG. One side of the central axis C of the winding tube 120 is a sectional view showing a cross section passing through the central axis C, and the other side is a diagram showing the outer surface. In FIG. 2, points a to n are points on the cross-sectional view. It is a flowchart explaining the process of the manufacturing method of a package. 4 is a diagram showing the relationship between the traverse width and the thickness of the yarn layer (the distance from the surface of the winding tube) in packages S1 and P1. FIG. 4 is a diagram showing the relationship between the traverse width and the yarn layer thickness (distance from the surface of the winding tube) in packages S2 and P2. FIG. FIG. 10 is a diagram showing the time dependence of the unwinding tension at the time of package unwinding for packages S1 and P1; On the horizontal axis, time 0 is the time when the unwinding ends, and as the time increases, it goes back in time and shows the time in which the package diameter is large. FIG. 10 is a diagram showing the time dependence of the unwinding tension at the time of package unwinding for packages S2 and P2; On the horizontal axis, time 0 is the time when the unwinding ends, and as the time increases, it goes back in time and shows the time in which the package diameter is large. FIG. 10 is a diagram schematically explaining measurement of unwinding tension of a package of a comparative example; It is a figure explaining typically the unwinding tension measurement of the package of an Example.

1. First Embodiment (1) Yarn Winding Device 10
A yarn winding device 10 of the first embodiment is a device that winds a yarn on the surface of a winding tube to form a yarn layer. In other words, it is a package manufacturing device. The yarn winding device 10 can wind the yarn 20 onto the package while controlling the traverse, traverse width, and traverse position. Yarn winding devices capable of controlling the traverse width and traverse position include an arm traverse type winding device and a belt traverse type winding device. The yarn winding device 10 of the present embodiment is an arm traverse type winding device, as shown in FIG.

The yarn winding device 10 winds the yarn 20 wound from the yarn supplying bobbin 21 onto the winding tube 120 . The yarn winding device 10 includes a balloon controller 12, a tension applying device 13, a splicer device 14, a clearer (yarn quality measuring device) 15, and a package forming device 16 in order from the yarn supplying bobbin 21 toward the winding tube 120. and have.

The balloon controller 12 has a restricting member 40 . By lowering the regulating member 40 covering the core tube of the yarn supplying bobbin 21 in conjunction with the unwinding of the yarn from the yarn supplying bobbin 21, the unwinding of the yarn from the yarn supplying bobbin 21 is assisted. The regulating member 40 contacts the balloon formed above the yarn supplying bobbin 21 by the rotation and centrifugal force of the yarn unwound from the yarn supplying bobbin 21, and applies appropriate tension to the balloon to unwind the yarn. assist Shu. A sensor for detecting the chase portion of the yarn feeding bobbin 21 is provided in the vicinity of the regulating member 40. When the sensor detects the descent of the chase portion, the regulating member 40 is driven by, for example, a stepping motor ( not shown). An air cylinder can also be adopted instead of the stepping motor.

The tension applying device 13 applies a predetermined tension to the running yarn 20 . As the tension applying device 13, for example, a gate-type device in which movable comb teeth 37 are arranged with respect to fixed comb teeth 36 can be used. The comb teeth 37 on the movable side can be rotated by, for example, a rotary solenoid 38 so that the comb teeth are engaged or disengaged. The tension applying device 13 can apply a constant tension to the wound yarn 20 to improve the quality of the package 100 . As the tension applying device 13, for example, a disk type device can be adopted in addition to the gate type device. Also, a stepping motor can be employed instead of the solenoid 38 .

When the clearer 15 detects a yarn defect and cuts the yarn, or when the yarn breaks while being unwound from the yarn supplying bobbin 21, the splicer device 14 separates the bobbin yarn on the yarn supplying bobbin 21 side and the yarn on the package 100 side. It splices the needle thread. As a yarn splicing device for splicing the needle thread and the bobbin thread, a mechanical device or a device using a fluid such as compressed air can be used.

The clearer 15 has a clearer head 49 and an analyzer 52 . A sensor for detecting the thickness of the yarn 20 is arranged on the clearer head 49 . Analyzer 52 processes the yarn thickness signal from the sensor. The clearer 15 is configured to detect yarn defects such as slabs by monitoring the yarn thickness signal from the sensor. A cutter 39 is provided near the clearer head 49 for cutting the yarn 20 immediately when the clearer 15 detects a yarn defect.

A lower thread guide pipe 25 is provided on the lower side of the splicer device 14, and an upper thread guide pipe 26 is provided on the upper side thereof. The bobbin thread guide pipe 25 catches the bobbin thread on the yarn supplying bobbin 21 side and guides it to the splicer device 14 . The needle thread guide pipe 26 catches the needle thread on the package 100 side and guides it to the splicer device 14 . The lower thread guide pipe 25 and the upper thread guide pipe 26 are configured to be rotatable around shafts 33 and 35, respectively. A suction port 32 is formed at the tip of the lower thread guide pipe 25 and a suction mouth 34 is provided at the tip of the upper thread guide pipe 26 . Appropriate negative pressure sources are connected to the lower thread guide pipe 25 and the upper thread guide pipe 26, respectively. configured for capture.

The package forming device 16 comprises a cradle 23 , a traverse device 27 and contact rollers 29 . The cradle 23 detachably supports the winding tube 120 . The winding tube 120 may be a paper tube or a plastic core tube. The traverse device 27 is an arm type traverse device for traversing the yarn 20 . The contact roller 29 is rotatable in contact with the peripheral surface of the winding tube 120 or the peripheral surface of the package 100 .

The cradle 23 is configured to be rotatable about the rotation shaft 48, and the rotation of the cradle 23 can absorb an increase in the yarn layer diameter that accompanies the winding of the yarn 20 onto the winding tube 120. is configured as Also, the cradle 23 and the traverse device 27 are configured to form a cone-shaped package 100 as shown in the figure.

A package drive motor 41 is attached to the portion of the cradle 23 that holds the winding tube 120 therebetween. The yarn 20 is wound by rotating the winding tube 120 by the package driving motor 41 . The motor shaft of the package driving motor 41 is connected to the winding tube 120 so as not to rotate relative to the winding tube 120 when the winding tube 120 is supported by the cradle 23 (so-called direct drive method). The operation of the package drive motor 41 is controlled by a package drive control section 42. The package drive control section 42 receives an operation signal from the unit control section 50 and controls the operation/stop of the package drive motor 41. ing.

A package rotation sensor 43 is attached to the cradle 23 . The package rotation sensor 43 is configured to detect rotation of the winding tube 120 attached to the cradle 23 (rotation of the thread layer 110 formed on the winding tube 120). A rotation detection signal of the winding tube 120 is transmitted from the package rotation sensor 43 to the package drive control section 42 and the unit control section 50 . Furthermore, the rotation detection signal is input to the traverse control section 46, which will be described later.

An angle sensor (package diameter acquisition unit) 44 for detecting the angle (rotation angle) of the cradle 23 is attached to the rotation shaft 48 . The angle sensor 44 is, for example, a rotary encoder, and is configured to transmit an angle signal corresponding to the angle of the cradle 23 to the unit control section 50 . Since the angle of the cradle 23 changes as the package 100 becomes thicker, the diameter of the yarn layer of the package 100 can be detected by detecting the rotational angle of the cradle 23 with the angle sensor 44 . Thus, by controlling the traverse device 27 according to the package yarn layer diameter, the yarn can be traversed appropriately. Also, the diameter of the yarn layer 110 acquired by the angle sensor 44 is transferred from the unit control section 50 to the package drive control section 42 .

The traverse device 27 includes an elongate arm member 28 configured to be rotatable around a support shaft, a hook-shaped traverse guide (traverse yarn guide) 11 formed at the tip of the arm member 28, and the arm member 28. and a traverse guide drive motor (traverse yarn guide drive unit) 45 that drives the . The traverse guide drive motor 45 is composed of a servomotor, and is configured to traverse the yarn 20 by reciprocating and turning the arm member 28 as indicated by the arrow in FIG.

It is controlled by the operating package drive of the traverse guide drive motor 45 . The traverse control section 46 is composed of hardware such as a dedicated microprocessor, and is configured to receive a signal from the unit control section 50 and control the operation/stop of the traverse guide drive motor 45 .

A traverse guide position sensor 47 consisting of a rotary encoder is attached to the traverse device 27 . The traverse guide position sensor 47 detects the turning position of the arm member 28 (and thus the position of the traverse guide 11 ) and transmits a position signal to the traverse control section 46 .

In this embodiment, as shown in FIG. 1, the package driving motor 41 and the traverse guide driving motor 45 are provided separately, and the winding tube 120 and the traverse guide 11 are driven (controlled) independently. Thus, the yarn 20 can be wound around the winding tube 120 while flexibly changing and controlling the traversing of the yarn 20 .

The traverse control unit 46 controls the operation of the traverse guide drive motor 45 to control taper winding.

The yarn winding device 10 further includes a control section. The control section includes a unit control section 50 , a traverse control section 46 and a package drive control section 42 .

The unit control section 50 has a CPU, a RAM, a ROM, and an I/O port. A program for controlling each part of the yarn winding device 10 is recorded in the ROM. The I/O port is connected to the traverse control section 46, the package drive control section 42, each section of the yarn winding device 10, and the setting device 64, so that control information can be communicated with each other.

A plurality of yarn winding devices 10 may be arranged side by side to form a set of automatic winders (yarn winding devices). A set of automatic winders may have a controller that controls the unit controllers 50 of the plurality of yarn winding devices 10 . Further, the setting device 64 may be provided in the control section that controls the unit control sections 50 of the plurality of yarn winding devices 10 . The setting device 64 is provided in the control section, and may be provided for each unit control section 50 .

The setting device 64 is configured to transmit and receive various types of information to and from the unit control section 50 provided in each yarn winding device 10 and to centrally manage a plurality of yarn winding devices 10 . The setter 64 has a display and input keys (not shown), and can transmit various set values to the unit controllers 50 .

(2) Package 100
The package 100 of this embodiment includes a winding tube 120 and a thread layer 110, as shown in FIG.

The winding tube 120 is a cone-shaped winding tube having a tapered winding surface. When viewed in cross-section in FIG. 2, the winding surface bm is inclined with respect to the central axis C by a first angle θ. The first angle θ is 3° or more and 6° or less. The winding tube 120 has a small diameter end surface 121 and a large diameter end surface 122 .

The yarn layer 110 is obtained by winding yarn so that a winding surface having the same inclination (first angle θ) as the winding surface of the winding tube 120 is formed. Therefore, when viewed in the cross-sectional view of FIG. 2, the outermost surface of the thread layer 110 is inclined at the first angle θ with respect to the central axis C of the winding tube 120 .

The traverse width W of the thread layer 110 monotonously decreases from the surface in contact with the winding tube 120 in the thickness T direction toward the surface of the thread layer 110 . Therefore, the traverse width We of the surface of the thread layer 110 is smaller than the traverse width Ws of the surface of the thread layer 110 in contact with the winding tube 120 . The thickness T of the thread layer 110 can be 20 mm or more and 130 mm or less, but is preferably 60 mm or more and 130 mm or less for the purpose of increasing the amount of thread wound.

The thread layer 110 includes a first thread layer 111 , a second thread layer 112 and a third thread layer 113 .

The first thread layer 111 is arranged on the winding tube 120 . The first traverse width W1 of the first yarn layer 111 is constant regardless of the distance from the winding tube 120, or decreases as the distance from the winding tube 120 increases. The first traverse width W1e of the first thread layer 111 adjacent to the second thread layer 112 is 90% or more and 100% or less of the first traverse width W1s of the first thread layer 111 adjacent to the winding tube 120.

The thickness T1 of the first thread layer 111 may be 10 mm or more and 60 mm or less. When the thickness T1 of the first thread layer 111 is less than 10 mm, it becomes difficult to increase the thread amount of the thread layer 110 as a whole. When the thickness T1 of the first thread layer 111 exceeds 60 mm, it becomes difficult to properly generate the unwinding balloon and lower the unwinding tension. In this sense, it is necessary to reduce the thickness T1 of the first thread layer 111, for example, to 40 mm or less when using thinner threads.

The second thread layer 112 is arranged on the first thread layer 111 . The second traverse width W2 of the second thread layer 112 decreases as the distance from the first thread layer 111 increases. The second traverse width W2e of the second thread layer 112 adjacent to the third thread layer 113 is 50% or more and 90% or less of the second traverse width W2s of the second thread layer 112 adjacent to the first thread layer 111. The rate of decrease of the second traverse width W2 of the second thread layer 112 is greater than the rate of decrease of the first traverse width W1 of the first thread layer 111 and the rate of decrease of the third traverse width W3 of the third thread layer 113. Here, the reduction rate of the traverse width W is the rate at which the traverse width W decreases with respect to the same length in the thickness T direction.

The second thread layer 112 may be composed of two or more thread layers. For example, in the package 100 shown in FIG. 2, the second thread layer 112 is composed of two layers, a fourth thread layer 112a in contact with the first thread layer 111 and a fifth thread layer 112b in contact with the third thread layer 113. It is configured. In FIG. 2, the reduction rate of the traverse width W2 of the fourth thread layer 112a is greater than the reduction rate of the traverse width W2 of the fifth thread layer 112b. Conversely, the reduction rate of the traverse width W2 of the fourth thread layer 112a may be smaller than the reduction rate of the traverse width W2 of the fifth thread layer 112b.

In the second thread layer 112, the reduction rate of the traverse width W2 may be different between the small diameter side and the large diameter side of the winding tube 120. In the package 100 of FIG. 2, the decrease rate of the traverse width W2 is large at the end face de on the small diameter side of the second yarn layer 112, and a steep slope is formed when viewed from the direction of the central axis C of the winding tube 120. However, at the end face kj on the large diameter side, the rate of decrease of the traverse width W2 is small and the slope is gentle. In FIG. 2, in the second thread layer 112, the inflection point e of the end face of the small diameter side and the inflection point j of the end face of the large diameter side together form the interface between the fourth thread layer 112a and the fifth thread layer. are doing. The bending point of the end surface on the small diameter side and the bending point on the end surface of the large diameter side may not be formed at the interface of the same thread layer. In other words, the bending point of the end face on the small diameter side and the bending point of the end face on the large diameter side may be arranged at different distances from the surface of the first thread layer 111 .

The third thread layer 113 is arranged on the second thread layer 112 . The third traverse width W3 of the third thread layer 113 is constant regardless of the distance from the second thread layer 112, or decreases as the distance from the second thread layer 112 increases. The third traverse width W3e (We) of the surface of the third thread layer 113 is 90% or more and 100% or less of the third traverse width W3s of the third thread layer 113 adjacent to the second thread layer 112 .

In the cross-sectional view of FIG. 2, the large diameter end face hi of the winding tube 120 of the third thread layer 113 is formed perpendicular to the winding surface bm of the winding tube 120 . Here, "perpendicular" includes not only completely perpendicular but also substantially perpendicular, 85° or more and 95° or less, more preferably 87° or more and 93° or less.

Similarly, in the cross-sectional view of FIG. 2, the small diameter end face gf of the winding tube 120 of the third thread layer 113 is formed perpendicular to the winding surface bm of the winding tube 120 . Here, "perpendicular" includes not only completely perpendicular but also substantially perpendicular, 85° or more and 95° or less, more preferably 87° or more and 93° or less.

The first traverse width W1 satisfies the relationship of the following formula (1) with respect to the third traverse width W3.
W1×1/2≦W3≦W1×2/3 (1)

Unless the third traverse width W3 is 1/2 or more of the first traverse width W1, it becomes difficult to increase the yarn amount of the entire yarn layer 110. FIG. Further, by setting the third traverse width W3 to 2/3 or less of the first traverse width W1, it is possible to appropriately generate the unraveling balloon and reduce the unraveling tension.

As described above, in one package 100, the first traverse width W1 or the third traverse width W3 may not be constant. In that case, in the above equation (1), the first traverse width W1s adjacent to the winding tube 120 is used as the first traverse width W1, and the surface width of the third yarn layer 113 is used as the third traverse width W3. A third traverse width W3e may be used.

Also, the thickness T3 of the third thread layer 113 is thicker than the thickness T2 of the second thread layer 112 . The thickness T3 of the third thread layer 113 is thicker than the thickness T1 of the first thread layer 111 . The thickness T1 of the first thread layer 111 is thicker than the thickness T2 of the second thread layer 112 .

In the package 100 shown in FIG. 2, the first traverse width W1e of the first yarn layer 111 adjacent to the second yarn layer 112 is equal to the second traverse width W2s of the second yarn layer 112 adjacent to the first yarn layer 111. equal. The second traverse width W2e of the second thread layer 112 adjacent to the third thread layer 113 is equal to the third traverse width W3s of the third thread layer 113 adjacent to the second thread layer 112 . That is, in the package 100 shown in FIG. 2 , the traverse width W continuously changes from the side of the yarn layer 110 in contact with the winding tube 120 toward the surface of the yarn layer 110 . The traverse width W does not have to change continuously. For example, it may change discontinuously between the first thread layer 111 and the second thread layer 112 and between the second thread layer 112 and the third thread layer 113 .

(3) Package Manufacturing Method A method for manufacturing the package 100 of the present embodiment will be described with reference to the flowchart of FIG. A yarn supplying bobbin 21 wound with a yarn 20 and a winding tube 120 are set in the yarn winding device 10 . Then, the yarn 20 is wound around the winding tube 120 to form the yarn layer 110 . The process of forming the thread layer 110 specifically includes the following steps (a) to (c). Steps (a) to (c) are
(a) forming the first thread layer 111 on the winding tube 120 with the first traverse width W1;
(b) forming a second thread layer 112 on the first thread layer 111 with a second traverse width W2 that gradually decreases;
(c) forming a third thread layer 113 on the second thread layer 112 with a third traverse width W3;
is. The thread layer 110, the first thread layer 111, the second thread layer 112, and the third thread layer 113 are as described in "(2) Package 100".

In order to set the traverse width and traverse position of the yarn layer 110 in the yarn winding device 10, the operator inputs these to the setting device 64 to design the shape of the package.

Specific examples of package design are illustrated in FIGS. 4 and 5. FIG. In FIGS. 4 and 5, the vertical axis is labeled “thread layer” and indicates the thickness T of the thread layer 110 or the distance from the surface of the winding tube 120 . The horizontal axis is labeled "traverse width" and indicates traverse width and traverse position. For example, the position of the traverse width of 0 mm passes through the point x closest to the small diameter side end surface 121 on the surface of the yarn layer 110 in contact with the winding tube 120 in the cross-sectional view of the package 100 in FIG. − means on a straight line perpendicular to m. Similarly, in the cross-sectional view of the package 100 in FIG. It means on a straight line perpendicular to the surface bm.

FIG. 4 shows design examples of the traverse width W and the traverse position of the yarn layer 110 of the package S1 of the example of the present disclosure and the package P1 of the comparative example. The type of yarn and the amount of yarn used are the same in the package S1 of the example and the package P1 of the comparative example. What is different is the traverse width W of the thread layer 110, the design of the traverse position, and the shape of the thread layer 110 as a result.

In the package S1 of FIG. 4, the thickness T of the thread layer 110 is 0 mm to 25 mm for the first thread layer 111, 25 mm to 50 mm for the second thread layer 112, and 50 mm to 90 mm for the third thread layer 113. . In the first thread layer 111 and the third thread layer 113, the traverse width W is constant. Looking at the cross-sectional view of the package 100 , the small-diameter end surface and the large-diameter end surface of the first thread layer 111 are perpendicular to the surface of the winding tube 120 . Similarly, the small-diameter end face and the large-diameter end face of the third thread layer 113 are perpendicular to the surface of the winding tube 120 .

In the package S1, the second thread layer 112 having a thread layer thickness T of 25 mm to 50 mm includes the fourth thread layer 112a having a thread layer thickness T of 25 mm to 40 mm and the fourth thread layer 112a having a thread layer thickness T of 40 mm to 50 mm. It consists of 2 layers of 5 yarn layers. The traverse width W of the second thread layer 112 decreases as the thickness T increases, and the rate of change changes discontinuously when the thickness T reaches 40 mm. At the small-diameter side end face and the large-diameter side end face of the second thread layer 112, slope change points exist. In the package S1, the change rate (decrease rate) of the traverse width W2 of the second thread layer 112 is greater on the small diameter side end surface than on the large diameter side end surface. Also, the traverse width W changes continuously from the position where the thickness T of the thread layer 110 is 0 mm to the position where the thickness T is 90 mm on the outermost surface. Therefore, the distance between the small-diameter end face of the third thread layer 113 and the small-diameter end face of the first thread layer 111 is the distance between the large-diameter end face of the third thread layer 113 and the large-diameter end face of the first thread layer 111. bigger than

The package P1 of the comparative example has a constant traverse width W and a constant traverse position.

FIG. 5 shows a design example of the traverse width W and the traverse position of the yarn layer 110 for packages S2 and P2 using yarns different from those in FIG. 4 (thicker yarns than those in FIG. 4). The type of yarn used and the amount of yarn used are the same for the package S2 of the example and the package P2 of the comparative example. What is different is the traverse width W of the thread layer 110, the design of the traverse position, and the shape of the thread layer 110 as a result.

In the package S2 of FIG. 5, the thickness T of the thread layer 110 is 0 mm to 40 mm for the first thread layer 111, 40 mm to 65 mm for the second thread layer 112, and 65 mm to 138 mm for the third thread layer 113. . In the first thread layer 111 and the third thread layer 113, the traverse width W is constant. Looking at the cross-sectional view of the package 100 , the small-diameter end surface and the large-diameter end surface of the first thread layer 111 are perpendicular to the surface of the winding tube 120 . Similarly, the small-diameter end face and the large-diameter end face of the third thread layer 113 are perpendicular to the surface of the winding tube 120 .

The traverse width W of the second thread layer 112 of the package S2 decreases as the thickness T increases. The change rate (decrease rate) of the traverse width W2 of the second thread layer 112 differs between the small diameter side end face and the large diameter side end face. In the package S2 as well as in the package S1, the distance between the small-diameter end surface of the third thread layer 113 and the small-diameter end surface of the first thread layer 111 is larger than the distance from the large-diameter side end face of

The package P2 of the comparative example has a constant traverse width W and a constant traverse position.

(4) Measurement of Unwinding Tension Unwinding tension was measured for the packages S1, S2, P1, and P2 in FIGS. 4 and 5, and the results will be described.

8A and 8B are diagrams schematically showing unwind tension measurement. 8A shows the case of using a conventional package, and FIG. 8B shows the case of using the package of this embodiment. The unwinding tension is measured while unwinding the yarn from the small diameter side of the winding tube, as shown in FIG. 8A or 8B. The unwinding speed is 1200 m/min, and the unwinding tension is continuously measured while all the yarn wound around the package is being unwound.

Figures 6 and 7 show the results of the unwind tension measurements. 6 and 7, the vertical axis indicates the measured value of the unwinding tension, and the horizontal axis indicates the unwinding time. The values of the unwinding tension fluctuate, and the measurement points in FIGS. 6 and 7 are average values for a given time at that time. On the horizontal axis, time 0 indicates the time when the unwinding is finished, and the positive time indicates the time before the unwinding is finished. At time 0, the thickness T of the thread layer is 0, which corresponds to measurement in a state where the thickness T of the thread layer increases toward the positive direction (right) of the time axis.

As shown in FIG. 6, in the package S1 of the present embodiment, the unwinding tension shows a low value both when the diameter is large and when the diameter is small. time is about 5000 s or more), the unwinding tension is large.

The case of FIG. 7 using yarn thicker than that of FIG. 6 also shows the same tendency as in FIG. It shows a smaller unwinding tension value than package P1.

Next, the reason why the packages S1 and S2 of the present embodiment show such a low unwinding tension will be considered.

As shown in FIG. 8A, in the package of the comparative example in which the traverse width is uniform, the yarn is released when the yarn on the large diameter side of the winding tube is unwound, especially when the diameter of the yarn layer is large. Friction is generated on the surface of the yarn layer (package) on the smaller diameter side than the position, increasing the unwinding tension. 8A and 8B, the portion drawn in thick lines on the peripheral surface of the package indicates the portion where friction occurs when the yarn is unwound. In addition, there is also the problem that it is difficult to properly release the balloon. In contrast, in the package of this embodiment, the thickness T1 of the inner first thread layer 111 is thin, and the traverse width W3 of the outer third thread layer 113 is narrow. Therefore, in the package of the present embodiment, as shown in FIG. 8B, when the outer third yarn layer 113 is unwound, the yarn is rubbed in a narrow range, and the unwinding tension can be kept low. There is also the advantage that the unraveling balloon is easily formed appropriately.

2. Features of Embodiments The above embodiments can also be described as follows.

A package 100 of the present disclosure includes a cone-shaped winding tube 120 and a thread layer 110 . The winding tube 120 has a tapered winding surface inclined from the central axis C by a first angle θ.

The yarn layer 110 is obtained by winding the yarn so that a winding surface having the same inclination as the winding surface of the winding tube 120 is formed. The thread layer 110 is in contact with the winding tube 120 and has a first thread layer 111 having a first traverse width W1, and the thread layer 110 is on the first thread layer 111 and decreases as the distance from the first thread layer 111 increases. It comprises a second thread layer 112 having a second traverse width W2 and a third thread layer 113 overlying the second thread layer 112 and having a third traverse width W3.

The first traverse width W1 satisfies the following relationship with the third traverse width W3.
W1×1/2≦W3≦W1×2/3 (1)

Also, the thickness T3 of the third thread layer 113 is thicker than the thickness T2 of the second thread layer 112 . The thickness T3 of the third thread layer 113 is thicker than the thickness T1 of the first thread layer 111 .

3. Other Embodiments Although one embodiment of the present invention has been described above, the present invention is not limited to the above-described embodiment, and various modifications are possible without departing from the gist of the invention.

The yarn winding device of the present disclosure can be applied to an automatic winder that uses a plurality of yarn winding devices side by side. Also, the package of the present disclosure is applicable to textile machines that produce a wide variety of fibers.

10 Yarn Winding Device 12 Balloon Controller 13 Tensioning Device 14 Splicer 15 Clearer 16 Package Forming Device 20 Yarn 21 Yarn Feeding Bobbin 23 Cradle 27 Traverse Device 29 Contact Roller 40 Regulation Member 41 Package Drive Motor 42 Package Drive Control Unit 45 Traverse Guide Drive Motor 46 traverse guide drive control unit 50 unit control unit 64 setting unit 100 package 110 thread layer 111 first thread layer 112 second thread layer 113 third thread layer 112a fourth thread layer 112b fifth thread layer 120 winding tube 121 winding Small-diameter end face 122 of the tube Large-diameter end face T of the winding tube Thread layer thickness W Thread layer traverse width C Central axes S1 and S2 of the winding tube Packages P1 and P2 of the example Package θ of the comparative example First angle

The end face of each thread layer on the small diameter side of the cone-shaped winding tube is defined as the small diameter side end face of each thread layer, and the end face of each thread layer on the large diameter side of the cone-shaped winding tube is defined as the large diameter end face of each thread layer. When viewed as a side end face and viewed in a cross-sectional view passing through the center line of the cone-shaped winding tube, the inclination angle of the small diameter side end face of the second yarn layer with respect to the direction perpendicular to the winding surface is the large diameter side The inclination angle of the end face with respect to the direction perpendicular to the winding surface may be different.

The operation of the traverse guide drive motor 45 is controlled by the traverse control section 46 . The traverse control section 46 is composed of hardware such as a dedicated microprocessor, and is configured to receive a signal from the unit control section 50 and control the operation/stop of the traverse guide drive motor 45 .

Claims (12)

a cone-shaped winding tube having a tapered winding surface inclined at a first angle from the central axis;
a yarn layer obtained by winding a yarn so that a winding surface having the same inclination as the winding surface is formed;
A package comprising
The thread layer is
a first yarn layer in contact with the winding tube and having a first traverse width W1;
a second yarn layer on the first yarn layer and having a second traverse width W2 that decreases with increasing distance from the first yarn layer;
a third yarn layer on the second yarn layer and having a third traverse width W3;
with
A package in which the first traverse width W1 satisfies the following relationship with respect to the third traverse width W3.
W1×1/2≦W3≦W1×2/3 The thickness T3 of the third thread layer is thicker than the thickness T2 of the second thread layer,
The thickness T3 of the third thread layer is thicker than the thickness T1 of the first thread layer,
The package of Claim 1. The first traverse width W1 of the first yarn layer is constant regardless of the distance from the winding tube, or decreases as the distance from the winding tube increases, and the second yarn layer The first traverse width W1e of the first yarn layer adjacent to is 90% or more of the first traverse width W1s of the first yarn layer adjacent to the winding tube,
The second traverse width W2e of the second yarn layer adjacent to the third yarn layer is 50% or more and 90% or less of the second traverse width W2s of the second yarn layer adjacent to the first yarn layer,
The third traverse width W3 of the third yarn layer is constant regardless of the distance from the winding tube, or decreases as the distance from the second yarn layer increases. The third traverse width W3e of the outer surface of the layer is 90% or more of the third traverse width W3s of the third yarn layer adjacent to the second yarn layer.
3. Package according to claim 2. the first traverse width W1e of the first thread layer adjacent to the second thread layer is equal to the second traverse width W2s of the second thread layer adjacent to the first thread layer;
the second traverse width W2e of the second thread layer adjacent to the third thread layer is equal to the third traverse width W3s of the third thread layer adjacent to the second thread layer;
4. Package according to claim 3. The thickness T1 of the first thread layer is thicker than the thickness T2 of the second thread layer,
A package according to any one of claims 1-4. The end face of each thread layer on the small diameter side of the cone-shaped winding tube is defined as the small diameter side end face of each thread layer, and the end face of each thread layer on the large diameter side of the cone-shaped winding tube is defined as the large diameter end face of each thread layer. When the side end face is
When viewed in a cross-sectional view passing through the center line of the cone-shaped winding tube,
The large-diameter end surface of the third thread layer is formed perpendicular to the winding surface of the cone-shaped winding tube,
A package according to any one of claims 1-5. The end face of each thread layer on the small diameter side of the cone-shaped winding tube is defined as the small diameter side end face of each thread layer, and the end face of each thread layer on the large diameter side of the cone-shaped winding tube is defined as the large diameter end face of each thread layer. When the side end face is
When viewed in a cross-sectional view passing through the center line of the cone-shaped winding tube,
The angle of inclination of the large-diameter side end surface or the small-diameter side end surface of the second thread layer with respect to the direction perpendicular to the winding surface changes along the way.
A package according to any one of claims 1-6. The end face of each thread layer on the small diameter side of the cone-shaped winding tube is defined as the small diameter side end face of each thread layer, and the end face of each thread layer on the large diameter side of the cone-shaped winding tube is defined as the large diameter end face of each thread layer. When the side end face is
When viewed in a cross-sectional view passing through the center line of the cone-shaped winding tube,
The inclination angle of the large-diameter side end surface of the second thread layer with respect to the direction perpendicular to the winding surface is different from the inclination angle of the large-diameter side end surface with respect to the direction perpendicular to the winding surface,
A package according to any one of claims 1-7. providing a cone-shaped winding tube having a tapered winding surface inclined at a first angle from the central axis;
forming a yarn layer by winding the yarn so that a winding surface having the same inclination as the winding surface is formed;
A method of manufacturing a package comprising
The step of forming the thread layer includes:
(a) forming a first yarn layer on the winding tube with a first traverse width W1;
(b) forming a second yarn layer on the first yarn layer with a second traverse width W2 that gradually decreases;
(c) forming a third thread layer on the second thread layer with a third traverse width W3;
with
A method of manufacturing a package in which the first traverse width W1 satisfies the following relationship with respect to the third traverse width W3.
W1×1/2≦W3≦W1×2/3 The thickness T3 of the third thread layer is thicker than the thickness T2 of the second thread layer,
10. The method of manufacturing a package according to claim 9, wherein the thickness T3 of the third thread layer is thicker than the thickness T1 of the first thread layer. A cone-shaped winding tube having a tapered winding surface inclined at a first angle from a central axis; A yarn winding device for creating a package comprising
a traversing yarn guide that traverses the yarn wound on the winding tube;
a traverse yarn guide drive unit for driving the traverse yarn guide;
A control unit for controlling the traverse yarn guide driving unit,
The control unit
(a) forming a first yarn layer on the winding tube with a first traverse width W1;
(b) forming a second yarn layer on the first yarn layer with a second traverse width W2 that gradually decreases;
(c) forming a third thread layer on the second thread layer with a third traverse width W3;
A yarn winding device with a control mode,
The first traverse width W1 satisfies the following relationship with respect to the third traverse width W3:
Yarn winding device.
W1×1/2≦W3≦W1×2/3 The control unit, depending on the control mode,
The thickness T3 of the third thread layer is thicker than the thickness T2 of the second thread layer,
The thickness T3 of the third thread layer is formed thicker than the thickness T1 of the first thread layer.
The yarn winding device according to claim 11.

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