JPH06104539B2 - Method of applying transfer tail in yarn winding machine - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a method for transferill forming a yarn wound on a bobbin.

(Prior Art) When winding a yarn around a bobbin, conventionally, as described in JP-A-50-35449, JP-B-55-34747, JP-A-54-82452, etc. From the thread gripping means provided on the thread gripping means to the traverse end on the thread gripping means side, the thread is moved at a predetermined pitch by a thread regulation guide or the like, and when the thread reaches the traverse end, It was released from the regulation guide, gripped by the traverse guide and transferred to the traverse movement to form the package.

(Problems to be solved by the invention) However, when the yarn is released at the traverse end from the regulation guide located upstream due to the fact that the yarn is printed on the friction rope, the yarn is restricted by the guides. In the absence of light, it quickly and rapidly moves toward the traverse center. At this time, the tension of the yarn drops sharply, so that the yarn is loosened and a plurality of single yarns of the yarn are disjointed, so-called single yarn cracking occurs, or the disjointed single yarns are adjacent to each other. When the yarn is released from the problem that the unwinding occurs in the post-process due to entanglement with the single yarn of the filament and the yarn is released from the regulation guide, and when it rapidly moves toward the traverse center, multiple filaments Since the yarns are gripped by the yarn guide of the traverse device in an unstable state where the single yarns of the single yarn are disjointed, some of the multiple single yarns are traversed with the yarn guide left unwound and unwound in the subsequent process. There was a problem that defects occurred.

An object of the present invention is to prevent the yarn from loosening, loosening, and entanglement of the yarn until the yarn is released from the regulation guide and transferred to the traverse guide at the time of applying the transfer till, and solves the above problems. Especially.

(Means for Solving the Problems) As a result of earnest studies on the cause of the above-mentioned problems, the inventor of the present invention makes one rotation of the bobbin holder in which the yarn moves toward the traverse center when the yarn is released from the regulation guide. The inventors have found that there is a close relationship between a value obtained by dividing the hit distance by a coefficient related to the bobbin diameter and the state of the yarn after transfer till molding, and thus arrived at the present invention.

That is, the present invention guides the yarn while forming a transfer till at the bobbin end by the yarn winding device while controlling the free movement of the yarn in the traverse direction by the regulation guide. After the yarn is gripped by the yarn gripping means arranged in the portion, and the yarn is wound around the bobbin outer peripheral surface at a predetermined interval from the yarn gripping means to the traverse maximum stroke end side in the vicinity of the yarn gripping means, Necessary for winding the yarn by releasing the yarn from the regulation guide within the range of the maximum traverse stroke exceeding the traverse maximum stroke end and freely moving the yarn in the traverse center direction as the bobbin rotates. Is a traverse motion, and V is a value obtained by dividing the movement distance per rotation of the bobbin by the free movement by the outer peripheral length of the bobbin, the value of V satisfies the following equation. A transfer Tir imparting method characterized by setting the release position of the yarn.

However, B in the formula is the width (m of the thread wound on the bobbin.
m), D is the outer diameter (mm) of the bobbin, and π is the circular constant.

The method of the present invention will be described below with reference to the drawings.

FIG. 1 shows an automatic switching winder adapted to automatically switch the yarns used when carrying out the method of the present invention,
Reference numeral 1 is a machine frame, and 2 is a turret table rotatably attached to the machine frame 1. Two bobbin holders 3 and 4 are rotatably projected on the turret table 2, and the bobbin holders 3 and 4 are configured to be movable in the axial direction during turret. Bobbins 5 and 6 for winding a yarn are mounted on the bobbin holders 3 and 4. A friction roller 9 is rotatably attached to the frame 8 above the bobbin holder 3, and the friction roller 9 is driven by a motor (not shown). A traverse device 7 having a yarn guide 12 for traversing the yarn Y is arranged on the right side of the friction roller 9. The friction roller 9,
The rotatably mounted frame 8 and traverse device 7 are fixedly mounted on a slide block (not shown) and are configured to be movable up and down along a slide shaft (not shown), and are pressed against the bobbin 5 with a predetermined contact pressure. ing.
The bobbin holder 3 is frictionally driven by the friction roller 9 being pressed against it.

The traverse device 7 is provided with a yarn removing guide 11 which is swingable to the side of the friction roller 9 extending in the axial direction of the friction roller 9 above the yarn guide 12, and when the yarn removing guide 11 changes the yarn, Remove the yarn Y from the yarn guide 12. The yarn Y removed from the yarn guide 12 is regulated by a device facing the traverse device 7 above the friction roller 9, and the yarn is guided to the yarn gripping means formed at the end of the bobbin to transfer the transfer till. A regulation guide 10 for forming is provided.

When the package (not shown) wound around the bobbin 5 mounted on the bobbin holder 3 reaches a predetermined amount, the other bobbin holder 4 is started by the running device (not shown), and when the number of rotations reaches a predetermined rotation, the turret. Rotate the table 2. Before the yarn Y wound around the package 13 of the bobbin holder 3 in the turret comes into contact with the bobbin 6 mounted on the bobbin holder 4, the yarn removing guide 11 is operated to remove the yarn from the yarn guide 12 and the bobbin of the regulating guide 10. The yarn 15 is regulated by the groove 15 for regulating the yarn formed in the traverse area in the vicinity of the yarn gripping means 14 (FIG. 2). Next, thread holding means formed on the bobbin 6 mounted on the bobbin holder 4.
14 is regulated by the groove 15 of the regulation guide 10 and the package 13
The bobbin holder 4 is moved in the axial direction so that the bobbin holder 4 is moved to a position corresponding to the yarn Y wound on the yarn Y, and the yarn holding means 14 of the bobbin 6 holds the yarn Y (FIG. 3). After a predetermined bunch is wound on the thread gripping means 14, the bobbin holder 4 is moved to the left and at the same time the regulation guide 10 is moved to the right to form the transfer till 16 on the bobbin 6 at a predetermined pitch A. , The bobbin holder 4 reaches the stroke end (Fig. 4). Further, after moving the regulating guide 10 to the right and winding the yarn Y on the bobbin 6 at a predetermined pitch C (FIG. 5), the yarn removing guide 11 is returned to release the yarn Y from the regulating guide 10. The yarn Y naturally moves toward the center of the traverse at a speed V represented by the following equation. At this time,
The yarn is held by the yarn guide 12 which is traversing, and the package is formed on the bobbin 6.

V: The speed at which the yarn naturally moves toward the center of the traverse when the yarn is released from the regulation guide B: The yarn width when the yarn is wound on the bobbin (mm) D: The outer diameter of the bobbin ( mm) π: Circumferential ratio In this case, the regulation guide 10 is located upstream of the yarn guide 12 and at a position not more than twice the traverse length (package winding width) from the print point of the yarn on the friction roller. It is preferably provided. In the present embodiment, the yarn is wound around the bobbin with the pitch A and the pitch C, but the axial movement distance of the bobbin holder is set to the minimum dimension so that the yarn does not drop from the package end face at the time of switching, The movement distance of the regulation guide is set so as to achieve the effect of the present invention. The pitch A is determined by the relative speed of the axial movement of the bobbin holder and the movement of the regulation guide, and the pitch C is set by the movement speed of the regulation guide.

In the above description, the bobbin holder is moved in the axial direction, but a guide is provided between the full bobbin and the empty bobbin so as not to fall from the end face of the full package of the yarn being switched, and the regulation is performed. It is also possible to adopt a system in which the yarn is guided to the yarn holding means of the empty bobbin by the movement of only the guide to impart the transfer till. The regulation guide is of a known type that has been conventionally used, for example, Japanese Patent Laid-Open No. 50-35449.
JP-B, JP-B-55-34747, JP-A-54-82452, JP-A-57-85764, JP-B-56-38500,
Those described in Japanese Patent Publication No. 52-151, Japanese Patent Publication No. 58-30224, etc. are used. Although the automatic switching winder has been described in the present embodiment, a winder configured to manually hook the yarn may be used. Further, instead of performing the release of the yarn between the yarn gripping means and the center of the traverse, the yarn is released at a position that exceeds the traverse center by a predetermined pitch and satisfies the value V of the present invention. You may Further, it is not limited to the friction drive type winder, but may be a spindle drive type winder.

(Example) Hereinafter, the present invention will be described with reference to an example.

Examples 1 to 5 Polyester filament yarn was wound at a winding speed of 4,000 m / min, and the state of transfer till was evaluated. At that time, the height H of the traverse guide, the pitch P of the transfer till, the yarn width B, the stroke width 2, and the bobbin diameter D shown in FIGS. 6 and 7 are as shown in Table 1. The fineness of the yarn and the number of filaments were also changed as shown in Table 1, and in each example, the position X for releasing the yarn was changed variously.

As shown in Table 2, the relationship between the pitch L when the yarn is released from the regulation guide, the traverse height H, and the position X at which the yarn is released substantially matches the following equation (1).

Here, substituting the equation (1) into 1.2B / πD ≦ V ≦ 3.80 × 10 ⁻² and multiplying both sides by πD, 1.2B ≦ L ≦ 3.80 × 10 ⁻² × πD (3) (2) Substituting equation (3) into equation (3), Therefore, the effect of the present invention can be achieved by setting the distance from the center of the traverse that releases the yarn from the regulation guide to X represented by the equation (4). That is, this is 1.2B / π
It is shown that the effect of the present invention is achieved when D ≦ V ≦ 3.80 × 10 ⁻² is satisfied.

Further, as is clear from the above data, it is understood that the distance that the yarn moves after being released from the regulation guide is irrelevant to the thickness and tension of the yarn, and the condition of the yarn is also the same.

(Effects of the Invention) The effects of the present invention are as follows.

(1) The value V obtained by dividing the moving distance of the yarn released from the regulation guide after the transfer till molding by the bobbin outer circumferential length per bobbin rotation of the yarn by the free movement at the time of release is 1.2B / πD. Since the range is set so that ≦ V ≦ 3.80 × 10 ^-2 , loosening of the yarn and looseness of the single yarn do not occur when the yarn is released, and unwinding failure in the subsequent process is eliminated. The yarn quality can be improved.

(2) Since the yarn contacting the bobbin surface is wound at a small winding angle, the friction resistance between the bobbin surface and the yarn becomes small at the time of unwinding, and the yarn is not tangled at the seam between the paper and the paper produced during bobbin molding. Since the thread is not caught, it will not break during unwinding.

(3) According to the present invention, when the yarn is released from the regulation guide, the state of moving in the traverse center direction is released at a stable position, so that the yarn guide holds all of the plurality of single yarns at the same time. I started to do traverse exercises,
Part of the single yarn does not move out of the yarn guide and is not traversed, and unwinding failure does not occur in the subsequent process.

[Brief description of drawings]

FIG. 1 is a front view showing an example of an apparatus for carrying out the method of the present invention, FIGS. 2 to 5 are developed side views for explaining a thread switching state in the method of the present invention, and FIG. 6 is a transfer in the method of the present invention. FIG. 7 is a schematic diagram for explaining a state in which a tiling is applied, and FIG. 7 is a diagram for explaining a state in which the yarn is released and the yarn naturally moves in the traverse center direction after the transfer till molding in the method of the present invention. FIG. 5, 6 ... bobbin, 7 ... traverse device 10 ... regulation guide, 12 ... traverse guide, 14 ... thread gripping means.

Claims (1)

[Claims] 1. When forming a transfer till at a bobbin end portion of a yarn winding device, the yarn is guided while a free movement of the yarn in a traverse direction is regulated by a regulating guide, and the bobbin end portion is guided. The yarn gripping means disposed on the bobbin is wound around the outer peripheral surface of the bobbin at a predetermined interval from the yarn gripping means to the traverse maximum stroke end side in the vicinity of the yarn gripping means. Within the range of the maximum traverse stroke beyond the maximum traverse end of the traverse, the yarn is released from the regulation guide, and the yarn is freely moved in the traverse center direction as the bobbin rotates, which is necessary for winding the yarn. When the value which is obtained by dividing the moving distance per rotation of the bobbin by the free movement by the outer peripheral length of the bobbin as V while shifting to the traverse motion is V, the value of V satisfies the following expression: Transfer Till imparting method characterized by setting the release position of the. However, B in the formula is the width (m of the thread wound on the bobbin.
m), D is the outer diameter (mm) of the bobbin, and π is the circular constant.