JPH0720129Y2 - Threading device for turret type winder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a yarn hooking device for a turret type winder used in melt spinning of synthetic fibers.

[Conventional technology]

The switching method in the yarn hooking device of the turret type winder used in the melt spinning of synthetic fibers is shown in FIGS.
As illustrated in FIGS. 6 and 6, the yarn T is guided to the yarn catching groove 2b of the empty bobbin 2a fitted on the bobbin shaft 2 provided above the full cheese 4 at the time of switching. The thread catching groove 5b of the empty bobbin 2a passes through the thread shifting guide 5
Then, the thread T is pushed into the bobbin thread catching groove 2b by the thread hooking guide 7. However, with the above method,
As the bobbin length becomes more uneven as it is machined, the thread catching groove 2b of the bobbin and the thread T do not match each other, resulting in a failure in switching. In order to deal with such a problem, as shown in FIG. 3 (Japanese Patent Laid-Open No. 62-290686), a method of swinging the threading guide 7 in the left and right direction has been devised, and the bobbin length has a large machining size variation. However, it is said that it can be easily switched. As another method, there is also used a method in which the bobbin shaft swings in the left-right direction to search for the thread catching groove of the bobbin, but such a method causes complication in terms of machine structure and electrical control. Not only is it forced, but when spinning at high speeds (6000 m / min or more), the yarn tends to fly due to the rotation of the bobbin shaft while searching for the yarn catching groove on the bobbin surface, and switching failures tend to occur. Comes out. Moreover, a method is known in which the touch roll and the empty bobbin are brought into a non-contact state in consideration of the yarn quality as the speed increases, but in such a method, the yarn vibrates due to the influence of the rotating wind force of the touch roll and the bobbin shaft. It does not match the thread catching groove, and switching fails.

[Problems to be solved by the invention]

The present inventors have completed the present invention as a result of intensive studies on the yarn hooking device of the conventional turret type winder. That is, an object of the present invention is to provide a yarn hooking device for a turret type winding machine that can perform stable winding without switching turrets during normal winding and high-speed winding.

[Means for solving problems]

The present invention relates to a thread shifting guide 5 for guiding the thread T at the time of switching to the thread catching groove 2b of the empty bobbin 2a fitted to the bobbin shaft 2 provided above the full cheese 4. A yarn hooking device for a turret type winder having at least a pair of yarn hooking mechanisms, each of which includes a yarn hooking guide 7 configured to push the yarn thread T into the yarn catching groove 2b of the empty bobbin 2a,
The yarn pulling guide 5 conveys the yarn T obliquely upward to the yarn catching groove 2b, passes the yarn regulating bar 8, and the yarn hooking guide 7 moves the yarn T to the yarn catching groove 2b at an angle of 1.5 to. The yarn T is pushed in contact with the empty bobbin 2a by moving from the front to the back in a position where the yarn T is obliquely crossed, and the yarn T is pushed into the yarn catching groove 2b of the empty bobbin 2a. It is a yarn hooking device for a turret type winder, which is characterized in that

In the yarn hooking device of the turret type winder according to the present invention, the yarn hooking guide is provided at a position where the yarn crosses the groove for catching the yarn of the bobbin obliquely. The mechanical structure and electrical control are simplified,
This has made it possible to significantly improve the success rate of high-speed spinning switching.

Hereinafter, the present invention will be described with reference to the drawings showing an embodiment of a yarn hooking device of a turret type winder according to the present invention.

FIG. 1 is a front view of a yarn hooking device of a turret type winder according to the present invention, and FIG. 2 is a side view thereof, each showing turret switching. As shown in FIGS. 1 and 2, at the time of switching, the yarn T is removed from the traverse guide 9 by the swinging movement of the kicker plate 6, and by the movement of the yarn pulling guide 5, the yarn catching groove 2b of the bobbin is diagonally above. It is carried to the machine and passed through the thread regulation bar 8 and wrapped around the full cheese 4. Second
As shown in the figure, the thread hooking guide 7 is the thread catching groove of the empty bobbin.
Push the yarn while slanting it into 2b, and the yarn will go into the yarn catching groove 2b.
Enters and is wound on an empty bobbin. At this time, the oblique crossing of the yarn intersects with the yarn catching groove at the center of the bobbin as shown in FIG. 1, and its angle is optimally 1.5 to 3.0 degrees.

〔Example〕

Comparative example of switching success rate when melt spinning the polyester multifilament (75d / 36f) at a take-up speed of 6000 to 7000 m / min using the yarn hooking device of the turret type winder according to the present invention (oscillating yarn hooking device) ) And the results are shown in Table 1. In Example 1 shown in Table 1, as shown in FIG. 1, the intersection angle between the yarn and the thread catching groove at the center of the bobbin was adjusted to 1.5 degrees, Example 2 was adjusted to 3.0 degrees, and Comparative Example 1 was 0 degrees. Comparative Example 2 was adjusted to 10.0 degrees and the take-up speed was 600 under each condition.
The experiment was performed at 0, 6500, and 7000 m / min with a switching Doff number of 150 Doff. Comparative Example 3 is the result of using the yarn hooking device of the yarn hooking swing type shown in FIG.

From Table 1, it can be seen that the switching success rate is significantly improved by using the yarn hooking device of the turret type winder of the present invention.

The yarn hooking device of the turret type winder of the present invention shown in FIGS. 1 and 2 used in Examples 1 and 2 is a yarn hooking guide fixed type, and is the same as the conventional swing type yarn hooking device. In comparison, the mechanical cylinder and electrical control were simple and unnecessary.

[Effect of the device] By using the yarn hooking device of the turret type winder of the present invention, switching failure can be eliminated and winding can be stabilized in high-speed spinning. , It has become possible to become a yarn hooking device for a turret type winder that is greatly simplified.

[Brief description of drawings]

1 and 2 show an embodiment of a yarn hooking device for a turret type winder according to the present invention. FIG. 1 is a front view and FIG. 2 is a side view of FIG. FIG. 3 is a front view of a swing type yarn hooking device as a comparative example. FIG. 4, FIG. 5 and FIG. 6 show a yarn hooking device of a general turret type winder. 1: Full bobbin shaft, 2: Empty bobbin shaft, 3: Touch roll, 4: Full roll cheese, 5: Threading guide, 6: Kicker plate, 7: Threading guide, 8: Thread regulation bar, 9: Traverse Guide, 2a:
Empty bobbin, 2b: Thread catching groove.

Claims (1)

[Scope of utility model registration request] 1. A yarn pulling guide 5 for guiding a yarn T when switching to a yarn catching groove 2b of an empty bobbin 2a fitted on a bobbin shaft 2 provided above a full cheese 4. A yarn hooking device for a turret type winder having at least a pair of yarn hooking mechanisms, which comprises a yarn hooking guide 7 for pushing the yarn T into the yarn catching groove 2b of the empty bobbin 2a. 5 is the thread T for the thread catching groove
2b diagonally upward, through the thread tension bar 8 and the thread hooking guide 7 causes the thread T to form an angle of 1.5 to 3 with the thread catching groove 2b.
The yarn T is pushed into the empty bobbin 2a so as to contact the empty bobbin 2a by moving from the front to the back at a position where the yarn T is pushed into the yarn catching groove 2b of the empty bobbin 2a. A yarn hooking device for a turret type winder having a structure.