JP3275189B2 - Method and apparatus for winding high elongation yarn - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high elongation yarn such as a rubber yarn (elongation of 200% or more) or a spandex (elongation of 550% to 1000%) continuously supplied at a constant yarn speed. The present invention relates to a winding method suitable for winding well and a configuration of the winding device.

[0002]

2. Description of the Related Art A winding device for winding a yarn continuously supplied at a constant line speed on a bobbin as a package having a predetermined shape, that is, as a means for controlling the winding speed in a so-called take-up winder, is a yarn feeding device. In general, a dancer device is arranged in the middle of a line, and feedback control of the spindle rotation speed on the winding machine side is performed while detecting the tension of the yarn by the dancer device.

[0003]

However, when winding a high elongation yarn such as a delicate rubber yarn or spandex,
When controlling the number of spindle rotations by the above-mentioned dancer device, the yarn is easily stretched due to the slight rotational resistance of the dancing roller or stationary roller of the dancer device, and unexpected tension acts on the yarn, and the winding is performed. There is a problem that the taken yarn itself is damaged, and a bulge phenomenon (bulging of the end surface of the wound yarn) occurs in the package, thereby deteriorating the winding shape.

[0004] One of the thread winding conditions for improving the package shape is to reduce the tension (internal tensile stress) of the yarn from the start to the end of winding on the bobbin. Although it is said to be effective for prevention, it is extremely difficult to perform fine tension control with a low tension in the dancer control as described above due to the rotational resistance of the roller and the like, and urgent development is strongly desired.

[0005]

According to a first aspect of the present invention, there is provided a winding device for a high elongation yarn.
A roller bale that passively rotates in contact with the outer periphery of the package, a rotation speed detection means for the roller bale, and a rotation speed of the roller bale based on an output signal from the rotation speed detection device, regardless of an increase in the winding diameter of the package. A winding speed control means for controlling the number of rotations of the spindle so that the number is always constant; and a traverse device, wherein the spindle and the cam shaft of the traverse device are linked at a predetermined rotation ratio. .

[0006] winding device of a high elongation yarn of claim 2 wherein is irrespective of the winding diameter increment size package as the outer peripheral speed is constant at all times, winding speed control for controlling the rotational speed of the spindle Means and a traverse device, and means for interlocking the spindle and the cam shaft of the traverse device at a predetermined rotation ratio, and increasing the ratio of the rotation speed of the spindle to the yarn traverse speed by increasing the winding diameter of the package. It is characterized in that it includes means for changing step by step in the process.

[0007] Furthermore retractor high elongation yarn of claim 3, wherein, regardless of the package winding diameter increment size as the outer peripheral speed is constant at all times, winding speed control for controlling the rotational speed of the spindle Means and a traverse device, and a means for interlocking the spindle and the cam shaft of the traverse device at a predetermined rotation ratio, and a means for gradually changing the traverse width of the traverse device in a winding diameter increasing process. It is characterized by the following.

[0008]

[Action] In the take-up device of high elongation yarn of claim 1 wherein, the roller bail to passively rotate in contact with the outer periphery of the package, a rotation speed detecting means of the roller bail, the Winding speed control means for controlling the rotation speed of the spindle based on an output signal from the rotation speed detection means so that the rotation speed of the roller bale is always constant irrespective of an increase in the winding diameter of the package; By interlocking the cam shaft of the device with the predetermined rotation ratio, the traverse length of the yarn per unit outer peripheral length in the process of increasing the winding diameter of the package can be gradually reduced, and the actual winding in the process of increasing the winding diameter can be reduced. Since the yarn speed is reduced, the tension of the yarn is automatically and gradually reduced upon winding , and a bulge phenomenon is avoided.

According to a second aspect of the present invention, there is provided a winding device for a high elongation yarn, wherein the ratio between the rotational speed of the spindle and the yarn traverse speed is changed stepwise in the course of increasing the winding diameter of the package. By changing the speed ratio between the two, the rate of change of the actual winding speed from the start to the end of winding can be freely changed.

In the winding device for a high elongation yarn according to the third aspect , the traverse width of the traverse device is gradually changed in the process of increasing the winding diameter by changing the traverse width so that the traverse width is changed from the beginning of winding. The rate of change of the actual winding speed up to the end of winding can be freely changed.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings.

FIG . 1 is a front view showing an outline of a winding device according to the present invention, and FIG. 2 is a side view of the winding device.

In these figures, (1) is a spindle supported by a frame (2) of a winder, (3) is a bobbin holder fixed to the front end of the spindle (1), and B is the bobbin holder (3). A cylindrical bobbin in which five are inserted in series on the outer periphery of the bobbin, and each bobbin is provided with an upper lever (4).
By this operation, the bobbin holders (3) are securely held respectively.

[0014] (5), said frame (2) a cam box attached to the lower end of the swingably supported by an arm about the fulcrum 0 of the upper (6), the cam box (5) in the A known traverse cam (7) having a plurality of (corresponding to the number of bobbins) endless spiral grooves formed by connecting two spiral guide grooves having different winding directions to each other at both ends thereof is provided on the spindle (not shown). In parallel with 1),
A traverse guide (8) slidably provided in the longitudinal direction of the cam box (5) corresponding to each of the bobbins B is engaged with each of the spiral grooves. Each traverse guide (8) is reciprocated by the rotation of the traverse cam (7).

A plurality of traverse guides (8)
Are connected to each other by a rod (not shown), and a guide pin (not shown) provided on a part thereof is engaged with the only spiral groove formed on the traverse cam (7) to reciprocate at once. They may be moved.

The cam shaft (9) to which the traverse cam (7) is fixed and the spindle (1) are connected to a frame (2).
Are interlocked with a predetermined rotation ratio via a belt transmission mechanism (10) composed of a combination of a timing belt and a timing pulley provided behind the motor (2), which are fixed at the rear of the frame (2). 11)
Are simultaneously driven.

[0017] (12), said at the top of the cam box (5), the ends brackets (13) (13 ') an axially supported by the roller bail rotatably by, the roller bail (12), It rotates passively in contact with the outer peripheral surface of the package formed on the bobbin (B). The rotational speed is constantly detected on the upper surface of the cam box (5) as shown in FIG. The detection is made by means (14a). It should be noted that the above-mentioned rotation speed detecting means (14
As a), for example, a strip-shaped discontinuous reflection portion is provided at the end of the roller veil (12), and is configured by a limited reflection type photomicroswitch arranged to face the discontinuous reflection portion.

Further, the motor (11) of the spindle (1) for driving, in the yarn layer growth process of the package, the value of the rotational speed of the roller bail (12) is always preset lifting <br/> to continue As shown in FIG. 3, the roller bale (1) is controlled by a rotation speed detecting means (14a).
2) The number of revolutions is detected, and the pulse signal output from the
/ V converter (pulse-voltage converter) (15) replaces the voltage displacement signal with the winding speed control means (control circuit) (1)
6) In advance, the motor (1) is compared with the speed command voltage commanded by the yarn speed setting device (17) and based on the deviation signal.
By controlling the voltage to 1), the number of revolutions is gradually reduced with the growth of the yarn layer of the package P (increase in the winding diameter),
Feedback control is performed so that the rotation speed of the roller bale (12), that is, the peripheral speed of the package P is constant.

When the winding of the roller bale (12) and the bobbin B is started in a non-contact state, the roller bale (12) does not rotate until the package P reaches a predetermined thread layer. A means for detecting the peripheral speed is separately required. Therefore, as shown in FIG. 3, a pulley Q having the same diameter as the bobbin B is mounted on the spindle (1), and a detection pulley R having the same diameter as the roller bale (12) is supported in parallel with the spindle (1). The belt 5 is wound between Q and R, and the detection pulley R is provided with the same number of discontinuous reflection portions in the form of stripes as the roller bale (12), and the second rotation speed detecting means 14b is opposed to the discontinuous reflection portions. Provided. The second rotation speed detecting means (14b) includes a switching circuit T including a timer.
The F / V converter 15 is connected in parallel with the rotation speed detecting means (14a) through the second rotation speed detecting means (14b) from the start of winding until the yarn layer reaches a predetermined thickness. ), The number of rotations of the spindle (1) is controlled, and the roller bale (12) comes into contact with the package P due to the increase in the number of yarn layers.
Switching the relay contact of the rotation speed detecting means (14a).
, The peripheral speed of the package P is kept constant.

[0020] Incidentally, the number of discontinuous reflective portion to be provided to diameter ratio and detection pulley R between the detection pulley R and pulley Q is
Roller veil (12)
The second rotation number detection means (14b) may be set to emit a frequency signal substantially equal to the pulse signal generated by the rotation number detection means (14a) when the rotation speed reaches the steady rotation.

[0021] (18), in front of the winder, a non-contact yarn guides disposed at a predetermined distance from the cam box (5), yarn guide (18) is horizontally in cantilevered state A duct (2) is inserted into the projecting ventilation pipe (19).
0), the blower opening of the centrifugal blower (21) is connected, and a slit-shaped nozzle opening (2) is provided on the lower surface of the blower pipe (19) at a position corresponding to the center of each bobbin B.
2) is formed, and a guide plate (23) is provided on both sides of each nozzle opening (22), each of which faces downward and defines a parallel opposing gap and a consequent widening yarn gap.
Adjacent guide plates (23) were formed integrally.

The above-mentioned yarn guide (18) makes the yarn Y sent at a constant speed from a feed roller device (24) installed on the upstream side of the winding machine oppose the guide plate (23) from the nozzle opening (22). The air is jetted into the gap and levitated so as to turn sharply toward the traverse guide (8) while avoiding contact with the blower pipe (19).

[0023] (25) is a Itodan sensor attached to an upper surface of the air pipe (19) of the thread guide (18) and disposed respectively each one a relative Kakuitojo Y.

In the winding apparatus according to the present invention, a plurality of yarns fed at a constant line speed by a feed roller device (24) in the final stage of the spinning process or the yarn processing process of the high elongation yarn Y. Y is turned upward by the yarn guide (18), each yarn end is fixed to the bobbin B, and wound up in a cheese shape while traversing by the traverse guide (8).
The rotation speed of the spindle (1) is set such that the rotation speed of the roller bale (12) in contact with the surface of the package P and the peripheral speed of the package P are constant, that is, the apparent winding speed is constant. While being controlled as described above, the number of winds W of the package P is kept constant from the start to the end of winding by the interlocking rotation of the traverse cam shaft (9) and the spindle (1).

[0025] Therefore, considering the developed view of the package in at diameter D ₁ and D ₂ as shown in FIG. 4 (b), substantially winding yarn length L ₁ per unit outer peripheral length (l), L ₂ is 4
It is as shown in (b).

Here, assuming that the ratio between the winding lengths L ₁ and L ₂ is k,
From the similarity of triangles,

[0027]

(Equation 1)

The above (1) to the actual winding diameter D _1, D _2, traverse length T, by substituting winding number W, as if the ratio is determined, is illustrated in FIG. 4 (c), a constant wind Under a constant number of traverse lengths, the traverse lengths (t ₁ ) and (t ₂ ) per unit outer peripheral length have a relationship of t ₁ > t ₂ ... (2), and therefore L ₁ > L ₂ (3) The actual winding length gradually decreases as the diameter increases. That is, when winding a high elongation yarn, if the initial winding speed (substantially the winding speed) is set to be several percent higher than the line speed and the winding is started, the tension of the yarn Y is automatically increased as the package diameter increases. The bulge phenomenon is prevented, and the damage of the yarn due to the internal tensile stress of the package is reduced.

In the above embodiment, the simplest winding mode (in the case of cheese winding under the conditions of a constant number of winds and a constant traverse length) according to the method of the present invention has been described. The gradually decreasing ratio k of the actual winding speed (the winding length per unit time) from the start of winding to the end of winding of the package P is arbitrarily adjusted in each of the following embodiments and combinations thereof. Is possible.

[0030] Figure 5 and Figure 6 (A) and (B) shows an embodiment in which increased or decreased by the gradual change of the winding number of the decreasing ratio k.

FIG . 5 is a schematic view of a winding device capable of changing the number of winds.

[0032] To explain this, the motor 26 belt 2
Roller bale 28 (drum) for placing package P rotatably supported via 7 and driving positively in the winding direction
And a grooved drum 31 that traverses the yarn Y through a continuously variable transmission mechanism 29 including a pair of tapered rollers and a gear train 30. 32 based on the signal from the rotational speed value detecting means S ₁ of the package P, and continuously variable transmission mechanism 29, while checking the rotational speed of the output shaft by the detection means S _2, by operating the actuator 33, predetermined Shows a computer for setting a plurality of gear ratios.

[0033] The winding yarn machine, winding start yarn packages P in Zui also a command of the computer 32 while extending from (diameter D ₁₎ to the winding yarn end (diameter D _2), the ribbon winding on the surface of the package P ( A so-called step-precision winding in which the number of winds W is changed stepwise is performed while avoiding the number of winds at which there is a risk of causing pattern winding.

[0034] In FIG. 6 (b) the winding yarn machine, while gradually increasing the number of winding from W ₁ to W _2, the diameter D
₁ shows a case where the wound to a diameter D ₂ from.

[0035] According to this, in the winding end diameter D ₂ when real winding yarn length L ₂ of the unit outer peripheral length per l in winding end diameter D ₂ is wound without changing the W ₁ the wind number shorter than substantially winding yarn length L ₂ ', and thus decrease the ratio k Gayori large tension decreasing effect than that of FIG 4 can be understood to have been promoted.

[0036] Figure 6 (b) is opposite to the above, in case of reducing the number of winding from W ₁ W ₂ stepwise to, substantially winding yarn length of the unit outer peripheral length per l in winding end diameter D ₂ is L ₂ is substantially wound yarn length L ₂ 'longer in winding end diameter D ₂ in the case where the winding number W ₁ is constant winding, thus reducing the ratio k is relaxed.

[0037] FIGS. 7 to 9, by changing the traverse width is an example of a traverse width variable traverse device that can be used to change the gradual reduction ratio k.

[0038] To illustrate this, grooved cam piece 34 in conjunction with spindle tilts with according increases of the winding yarn winding yarn body
The traverse width of the thread guide 35 can be changed by tilting the groove cam piece 34. The groove cam piece 34 has a long groove 36 in the longitudinal direction, and is provided above the groove cam piece 34 in the traverse direction. A movable yarn guide holder 37 is provided, and the yarn guide holder 37 is provided with a yarn guide 35.

Further , a traverse direction shaft 39 is arranged on the front surface of the groove cam piece 34, and a traverse slide piece 41 reciprocated in the traverse direction by the traverse cam 40, and a regulation control slide that moves with the traverse slide piece 41. A piece 42 is movably supported along its axis 39.

[0040] Then 46, and the traverse slide piece 41, a groove cam piece 34, by swinging pieces for interlocking the movable yarn guide holder 37 or the like along the thread guide rod 48, rocker Dohen 46 Has pins 43 and 44 at the lower end and a pin 45 at the upper end. The interlocking of the groove cam piece 34 and the thread guide holder 37 by the swinging piece 46 will be described.
The pin 43 provided on the swinging piece 46 is inserted into the long groove 3 of the grooved cam piece 34.
6, and is loosely engaged with a groove 41a provided on the traverse slide piece 41 and orthogonal to the traverse direction, and a pin 44 is rotatably loosely engaged with the regulation control slide piece.

The groove 37 further orthogonal to the traverse direction in which a pin 45 of the swinging piece 46 to the yarn guide holder 37
a.

[0042] Te Thus, said projections 47a of the tip of the operating lever 47 which rotates with the increase in the winding diameter of the winding yarn body long groove 36
And the traverse width is changed by tilting the groove cam piece 34 in accordance with the increase in the winding diameter of the winding body (this device is disclosed in Japanese Utility Model Publication No. 1-3456).

FIGS . 10A and 10B show that the traverse width of the yarn guide is increased or decreased in accordance with the increase in the winding diameter of the package, so that the winding starts (diameter D ₁ ) and ends at the winding end (diameter D ₂ ). shows a case where gradually decrease or increase the traverse length from T ₁ to T ₂ during leading.

FIG . 10A shows a case where the traverse length is gradually reduced from T ₁ to T ₂ as the winding diameter of the package increases, so-called pineapple winding is performed.

[0045] According to this, the winding end diameter D ₂ when wound on without changing the unit periphery length T ₁ in (diameter D ₂₎
Is smaller than the actual winding length L ₂ ′, and therefore the reduction ratio k is larger than when the traverse length is constant.

FIG . 10B shows a case in which the traverse length is increased from T ₁ to T ₂ as the package becomes thicker.

As shown in the drawing, the package diameter D ₂ of the traverse length T ₂ is such that the actual winding yarn length L ₂ ′ per unit outer circumference l does not change the traverse length T ₁ and the diameter D ₂ The winding ratio is larger than the actual winding length L ₂ ′ when wound up to the maximum winding length, and the reduction ratio k is more moderate than in the case of cheese winding (scare end cheese).

When the increase in the traverse length is set to be extremely large, the use of a known bobbin with a flange shown in FIG. 11 can prevent the end face of the yarn from dropping.

In this embodiment, the traverse width is increased at both ends of the package P, but the same effect can be expected by increasing only one of them.

In the embodiment shown in FIGS. 1 to 3, as a means for keeping the outer peripheral speed of the package P constant irrespective of the increase in the winding diameter, a roller for touching the outer periphery of the package P is used. Although the method of detecting the number of rotations of the bale and controlling the number of rotations to be constant has been exemplified, as means for keeping the outer peripheral speed of the package P constant, the outer diameter of the package P is measured by an optical sensor or the like. A method of controlling the spindle rotation speed in real time based on data, and a method of controlling the pindle rotation speed based on the tilt angle of the cradle caused by increasing the diameter by supporting the package P with a cradle so that the package P can move away from the fixed roller bale. Various control means, such as a method for performing the control, are applicable.

[0051]

According to the present invention, the following effects can be obtained.

[0052] In the winding device of a high elongation yarn of claim 1 wherein, the roller bail to passively rotate in contact with the outer periphery of the package, a rotation speed detecting means of the roller bail,
Winding speed control means for controlling the rotation speed of the spindle based on an output signal from the rotation speed detection means such that the rotation speed of the roller bale is always constant irrespective of an increase in the winding diameter of the package; By interlocking the cam shaft of the traverse device at a predetermined rotation ratio, the traverse length of the yarn per unit outer peripheral length in the process of increasing the winding diameter of the package can be gradually reduced, and the yarn can be reduced in the process of increasing the winding diameter. It is possible to prevent the occurrence of a bulge by successively reducing the stretching rate of the yarn, and to significantly reduce the damage caused by the internal tensile stress of the wound yarn.

[0053] In the winding device of a high elongation yarn of claim 2, wherein, by means of stepwise change in the winding diameter increment atmospheric process the ratio of package between the rotation speed and the yarn traverse speed of the spindle, By changing the speed ratio between the two, the rate of change of the actual winding speed from the beginning of winding to the end of winding can be freely changed, and the degree of decrease in the actual winding speed can be freely changed. More advanced tension control becomes possible.

In the winding device for a high elongation yarn according to the third aspect , the traverse width of the traverse device is gradually changed in the process of increasing the winding diameter by changing the traverse width so that the traverse width can be changed from the beginning of winding. The rate of change of the actual winding speed up to the end of winding can be freely changed, and the degree of decrease in the actual winding speed can be freely changed, thereby enabling advanced tension control.

[Brief description of the drawings]

FIG. 1 is a schematic front view showing an embodiment of a winding device according to the present invention.

FIG. 2 is a side view of the winding device of FIG. 1;

FIG. 3 is a block diagram showing an example of a speed control unit of the winding device of FIG. 1;

FIG. 4 is an explanatory diagram showing a relationship between an increase in the diameter of the winding yarn and a change in the actual winding length per unit outer peripheral length.

FIG. 5 is a schematic front view of another embodiment.

6 is a diagram showing the relationship between the increase in the diameter of the winding yarn and the change in the actual winding length per unit outer peripheral length in the case of winding while increasing the number of winds and in the case of winding while decreasing the number of winds in FIG. 5; Figure

FIG. 7 is a schematic front view of still another embodiment.

8 is a sectional view taken along line VIII-VIII in FIG. 7;

FIG. 9 is a plan view with a part cut away.

FIG. 10 shows the relationship between the increase in the diameter of the winding yarn and the change in the actual winding yarn length per unit outer circumferential length when the traverse length is increased or decreased by the embodiment apparatus of FIGS. 7 to 9; Explanatory diagram showing the relationship

11 is a side view of the bobbin used in FIG.

[Explanation of symbols]

Reference Signs List 1 spindle 3 bobbin holder 9 cam shaft 11 motor 12 roller bale 14a, 14b rotation number detecting means P package Y yarn (high elongation yarn)

──────────────────────────────────────────────────の Continued on front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B65H 54/02 B65H 54/28

Claims (3)

(57) [Claims] A roller bail to passively rotate 1. A in contact with the outer periphery of the package, the rotational speed detecting means of the roller bail, based on an output signal from said rotational speed detecting means, regardless of the package winding diameter increment size A winding speed control means for controlling the rotation speed of the spindle so that the rotation speed of the roller bale is always constant, and a traverse device are provided, and the spindle and the cam shaft of the traverse device are linked at a predetermined rotation ratio. A high elongation yarn winding device. 2. A traverse device, comprising: a winding speed control means for controlling the number of revolutions of the spindle so that the outer peripheral speed of the package is always constant irrespective of an increase in the winding diameter of the package; Means for interlocking the camshaft with the camshaft at a predetermined rotation ratio, and means for stepwise changing the ratio between the spindle rotation speed and the yarn traverse speed in the process of increasing the winding diameter of the package. High elongation yarn winding device. 3. A winding speed control means for controlling the number of revolutions of the spindle and a traverse device so that the outer peripheral speed of the package is always constant irrespective of an increase in the winding diameter of the package. A winding device for a high elongation yarn, comprising: means for interlocking with a cam shaft at a predetermined rotation ratio; and means for gradually changing a traverse width of the traverse device in a winding diameter increasing process.