JPH0891701A - Taking-up of thread and device therefor - Google Patents

Abstract

PURPOSE: To contrive the formation of a pineapple-shaped package having the excellent winding shape, by taking up a thread with a constant tension so that the traverse angle becomes constant, in spite of the fact that the winding diameter of a package increases. CONSTITUTION: The gradual increase of the winding diameter of a package P is detected by a position detection member S, and the detection signal is inputted into a controller C, and the controller C controls the number of revolution of a motor MS for revolution-driving a scroll cam 1 so that the traverse angle becomes constant or nearly constant, i.e., the speed of a thread guide arranged at one end of a traverse arm becomes constant. Accordingly, the traverse speed which becomes lower as the winding diameter of the package P increases more is kept constant by increasing the number of revolution of the package P, and the traverse angle is kept always constant or nearly constant, even when the winding diameter of the package P increases.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention gradually reduces the traverse width as the package winding diameter increases,
Both ends of the package are tapered, so-called
The present invention relates to a yarn winding method and device for forming a pineapple-shaped package.

[0002]

2. Description of the Related Art Conventionally, a cam block having a cam shoe engaged with a groove of a scroll cam rotating at a constant number of revolutions and a traverse arm having a substantially L-shaped plane is reciprocated along a guide rod. And a device for winding the yarn, in which a cam plate for traversing the yarn with the cam plate for rotating the traverse arm so that the traverse width is gradually reduced according to an increase in the winding diameter of the package is provided. It is known (for example, JP-A-63-123772 and JP-A-3-73760).

The above-described conventional yarn winding method and its device will be described in more detail with reference to FIG. 3 which is a schematic plan view of a yarn winding device to which a conventional yarn winding method is applied. .

Reference numeral 1 is a scroll cam 1 having a spiral groove 1 ', and 2 is a cam block slidably supported by a guide rod 3. The cam block 2 is provided with a cam shoe (not shown) that engages with the groove 1 ′ of the scroll cam 1. Therefore, the rotation of the scroll cam 1 causes the cam shoe to engage with the groove 1 ′ of the scroll cam 1. The cam block 2 having the reciprocating motion reciprocates in the left-right direction along the guide rod 3.

A shaft 4 disposed on the cam block 2 is pivotally attached to a substantially corner portion of a traverse arm 5 having a substantially L-shaped plan view. One end of the traverse arm 5 has a yarn guide 5 '. However, a slide piece 5 ″ is arranged at the other end of the traverse arm 5. Reference numeral 6 denotes a cam plate arranged along the scroll cam 1 and rotatable about a shaft 7. A slide piece 5 ″ arranged at the other end of the traverse arm 5 is slidably engaged with a linear cam groove 6 ′ provided along the longitudinal direction of the cam plate 6. . Reference numeral 8 denotes a roller attached to one end of the cam plate 6, and the roller 8 has a package P.
The arm 9 movable in the up-down direction according to the winding diameter of the abuts. A spring 10 is attached to the cam plate 6 so that the roller 8 is always in contact with the arm 9.

At the beginning of winding the package P, the cam plate 6 is substantially parallel to the scroll cam 1 as shown in FIG. 3, and the traverse arm 5 is at the position shown by the solid line. Then, as the winding diameter of the package P increases, the arm 9 gradually moves upward in association with the winding diameter of the package P, and thus,
The cam plate 6 rotates counterclockwise about the shaft 7.
As the winding diameter of the package P increases, the cam plate 6 rotates in the counterclockwise direction, so that the traverse arm 5 is centered on the shaft 4 and, when the traverse arm 5 is located at the left end, as indicated by a chain double-dashed line. When the traverse arm 5 is positioned at the right end, the traverse arm 5 rotates counterclockwise.
The traverse width of the yarn that is traversed by engaging the yarn guide 5'disposed on is gradually reduced as the winding diameter of the package P increases, and a pineapple-shaped package is formed.

[0007]

In the above-described conventional yarn winding method and device, the number of revolutions of the scroll cam 1 is always constant, and in other words, as the winding diameter of the package P increases. Then, as the traverse width becomes narrower, the cam plate 6 rotates counterclockwise about the shaft 7, and the inclination of the cam plate 6 becomes larger. Therefore, the yarns arranged at one end of the traverse arm 5 The speed of the guide 5 ', that is, the traverse speed of the yarn, is reduced.

As described above, as the winding diameter of the package increases, the traverse speed of the yarn decreases, so the winding angle decreases, and thus the winding tension increases as the winding diameter of the package P increases. Becomes gradually smaller, the yarn cannot be wound with a constant tension, and the winding shape of the package becomes defective. In addition, the rewinding tension of the yarn released from the package in which the winding tension is not constant is naturally not constant, so that the yarn release failure or the like is caused. In particular, when the yarn is a covering yarn or an elastic yarn, the unwinding tension is not constant, that is, the tension is small at the beginning of the unwinding when the winding diameter of the package is large. Crinkling occurs and problems such as rewinding malfunction occur.

An object of the present invention is to solve the problems of the above-described conventional yarn winding method and device and to provide a yarn winding method and device capable of stable winding.

[0010]

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, the present invention is to wind a yarn into a pineapple-shaped package with a constant traverse angle or a substantially constant angle, regardless of an increase in the winding diameter of the package. Further, according to the increase in the winding diameter of the package, the number of rotations of the scroll cam is increased to wind the yarn into a pineapple-shaped package at a constant or substantially constant traverse angle,
Further, the detection member for detecting the winding diameter of the package and the scroll cam driving device are controlled by the detection member so that the yarn is wound around the pineapple-shaped package at a constant or substantially constant traverse angle.

[0011]

EXAMPLE FIG. 1 is a schematic block diagram of a yarn winding device to which a yarn winding method of the present invention is applied, and FIG. 1 is a graph showing changes in the number of rotations of a scroll cam with winding elapsed time. There will be described an embodiment of the present invention with reference to FIG. 2. However, the present invention is not limited to the embodiment unless the gist of the present invention is exceeded.

In FIG. 1, P is a package in which both end surfaces of the above-mentioned package are tapered, that is, a so-called pineapple package, and F is in contact with the package P,
A friction roller that rotationally drives the package P, and is rotated at a constant rotation speed by an appropriate motor Mf. Reference numeral 1 denotes a scroll cam in the above-described conventional yarn winding device, which is rotationally driven by an appropriate motor Ms. S is, for example, a position detection member that supports the package P and rotates as the winding diameter of the package P increases, and detects the rotational position of a cradle arm (not shown). The gradual increase in the winding diameter of P is detected, and this detection signal is input to the control device C so that the control device C causes the rotation speed of the motor Ms that rotationally drives the scroll cam 1 to be constant or substantially constant. That is, so that the speed of the yarn guide 5 ′ arranged at one end of the traverse arm 5 in the above-described conventional yarn winding device becomes constant,
It is configured to increase gradually. That is, the traverse speed, which becomes slower as the winding diameter of the package P increases, is kept constant by increasing the rotation speed of the scroll cam 1, and the traverse angle is always maintained even if the winding diameter of the package P increases. Is constant or substantially constant. Instead of the control device C, a continuously variable transmission is arranged between the scroll cam 1 and a motor Ms that rotationally drives the scroll cam 1, and the continuously variable transmission is controlled by rotating the cradle arm. The rotation speed of the motor Ms can also be gradually increased.

As shown in FIG. 2, which is a graph showing the change in the number of revolutions of the scroll cam with the elapsed winding time, as shown in FIG. 2, the winding time gradually increases from the beginning of winding, that is, the package P As the winding diameter increases,
The number of rotations of the scroll cam is gradually increased so that the winding angle becomes constant or substantially constant. In FIG. 2, the horizontal dash-dotted line represents the conventional yarn winding method in which the rotation speed of the scroll cam is constant.

[0014]

Since the present invention is constructed as described above, it has the following effects.

Since the yarn is wound so that the winding angle is constant or substantially constant regardless of the increase in the winding diameter of the package, the yarn can be wound with a constant tension, and therefore, A pineapple-shaped package having a good winding shape can be formed, and the yarn can be rewound from the pineapple-shaped package thus formed with a constant tension.

[Brief description of drawings]

FIG. 1 is a schematic block diagram of a yarn winding device to which a yarn winding method of the present invention is applied.

FIG. 2 is a graph showing changes in the number of rotations of the scroll cam with the elapsed winding time.

FIG. 3 is a schematic plan view of a conventional yarn winding device.

[Explanation of symbols]

C: Control device F: Friction roller Ms: Scroll cam drive motor P:・ ・ ・ ・ ・ Pineapple package S ・ ・ ・ ・ ・ ・ ・ ・ Position detection member 1 ・ ・ ・ ・ ・ ・ ・ ・ Scroll cam

Claims (3)

[Claims] 1. A yarn winding method, wherein a yarn is wound around a pineapple-shaped package at a constant or substantially constant winding angle regardless of an increase in the winding diameter of the package. 2. The yarn is wound into a pineapple-shaped package at a constant or substantially constant winding angle in accordance with an increase in the winding diameter of the package to increase the rotational speed of the scroll cam. The method of winding the yarn. 3. A yarn for winding a yarn into a pineapple package with a constant or substantially constant traverse angle by controlling a detecting member for detecting a winding diameter of the package and a scroll cam driving device by the detecting member. Strip winding device.