JPH0415742Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a thread winding device in a spindle-driven winder that winds thread by reciprocating a bobbin in the axial direction.

(Prior art) The thread guide in this kind of thread winding device is a fixed type or, for example, as described in Japanese Patent Publication No. 48-31178, it is formed by a roller held on a swinging lever, and the thread guide is formed by a roller held by a swinging lever. Devices in which rollers are moved in an arc are already known.

(Problem to be solved by the invention) In the latter of the above conventional devices, the amount of bending of the yarn changes frequently due to the arc-shaped movement of the roller due to the swinging of the lever, and therefore the winding angle changes and remains constant. It is difficult to obtain such winding conditions, and since the number of rollers is large, the yarn is likely to be damaged due to bending, and this problem is especially serious in the case of carbon fiber. Furthermore, the former type, in which the thread guide is of a fixed type, has no responsiveness to fluctuations in thread tension, resulting in many thread breakage accidents.

(Means for Solving the Problems) The present invention eliminates the above-mentioned conventional drawbacks and reduces the bending given to the threads to prevent damage.
In a spindle-driven winder that winds yarn by reciprocating the bobbin in the axial direction, a roller that moves up and down while keeping the axis parallel to the bobbin according to the tension of the winding yarn is installed just in front of the bobbin as a yarn guide. , and the roller has a diameter equal to or larger than the diameter of the bobbin, and the roller is biased in a direction away from the bobbin.

(Example) In the drawings, 1 is the machine frame, and 2 is the support part 3 on the machine frame.
The spindle is rotatably supported by a spindle and is driven by a motor 4 on the machine frame. 5 indicates a bobbin that rotates together with the spindle but is held so that it can move on the spindle.

Reference numeral 6 denotes a traverse cam which is formed into an endless shape by connecting two spiral grooves 7 in opposite directions on the circumferential surface at both ends. A shaft rod 10 is connected to a traverse guide 9 that engages with a groove of the cam and reciprocates in the length direction by rotation of a cam, and the other end of the shaft rod is connected to a bobbin 5.
The movable member 11 is connected to the movable member 11 so as to be movable together with the movable member 11. Therefore, the bobbin 5 is rotated by the rotation of the spindle 2 while repeating reciprocating motion on the spindle 2 as the traverse guide 9 reciprocates due to the rotation of the traverse cam 6, thereby winding the yarn.

In the above spindle-driven winder,
The thread a is wound onto the bobbin 5 through a guide roller 12 provided at a fixed position, but in the present invention, just before the bobbin 5,
The present invention is characterized in that a roller 13 that moves vertically while keeping the axis parallel to the bobbin 5 is provided as a thread guide.

The roller 13 is connected to the bobbin 5 and the guide roller 12.
It is formed as a dancer roller suspended on the thread a between them, moves up and down only in the vertical direction according to the tension of the thread a, and has a relatively large diameter that is approximately equal to or larger than the diameter of the bobbin 5, The bending of yarn a was reduced.

That is, as shown in FIG. 3, a vertical guide rod 14 is fixed to one side of the machine frame 1, and the roller 13 is attached to a shaft piece 16 fixed to an elevating member 15 that moves up and down along the vertical guide rod 14.
is rotatably supported in a loose manner, a thread a is suspended on this, a weight 17 is suspended from the shaft piece 16, and a grooved trochanter 18 provided on the elevating member 15 is attached to the vertical guide rod 14.
By engaging the fixed shaft 19 provided parallel to the lifting member 15, the lifting member 15 is prevented from rotating in the lateral direction and is restricted from moving only in the vertical direction, and the movement of the roller 13 as a thread guide is controlled. One end of the wire 21 suspended from a pulley 20 pivotally supported on the frame 1 is connected to the lifting member 15.
A balance weight 22 is suspended from the other end of the wire 21 to make the vertical movement of the lifting member 15 smooth and light, and to make the up and down response of the roller 13, which serves as a yarn guide, due to fluctuations in the tension of the yarn a more sensitive. .

(Function) In the above configuration, after passing through the guide roller 12, the yarn a is wound around the bobbin 5 which is reciprocated by the drive of the spindle 2 and the traverse cam 6 while suspending the roller 13 which serves as a yarn guide. , fluctuations in the tension of the thread a during winding can be automatically adjusted by the vertical movement of the roller 13, which acts as a dancer roller, and the roller 13 acts as a thread guide to ensure a predetermined thread path and accurately move the thread. have them wind the thread.

(Effects of the invention) According to the invention, a dancer roller suspended from the thread is provided as a thread guide at a position immediately before the bobbin, and the roller is moved only in the vertical direction, so that the number of contact points with the thread is kept to a minimum. This is effective for maintaining quality when winding fiber yarns that are vulnerable to friction, such as carbon fibers, and the dancer roller automatically adjusts the yarn tension by its vertical movement. In addition, since the diameter of the roller is made large, there is little bending of the yarn, reducing damage to the yarn, and since there is little variation in yarn tension, the winding state is stable and a package with a good shape can be obtained.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; Fig. 1 is a front view, Fig. 2 is a partially cutaway plan view, Fig. 3 is a partially cutaway side view, and Fig. 4 is a reciprocating view of the bobbin. FIG. 3 is a partially cutaway side view showing the operating mechanism section. 2...Spindle, 5...Bobbin, 13...Thread guide.

Claims (1)

[Scope of utility model registration request] In a spindle-driven winder that winds yarn by reciprocating the bobbin in the axial direction, a roller that moves up and down while keeping the axis parallel to the bobbin according to the tension of the winding yarn is installed just in front of the bobbin as a yarn guide. , and a thread winding device in which the roller has a diameter equal to or larger than the diameter of the bobbin, and the roller is biased in a direction away from the bobbin.