JPH101258A - Belt traverse device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a belt traverse device such that yarn delivery errors do not occur even in the event of fluctuation of tension etc. SOLUTION: Traverse guides 29, 30 are fixed in the opposite positions of endless timing belts 27, 28 overlappe one above the other and running in opposite directions, and yarn delivery plates are provided close to both sides of the front of each timing belt; yarn-receiving timing pulleys 23, 26 are made larger in diameter than yarn-delivery timing pulleys 24, 25, and the length of the yarn propelling part of each of the traverse guides 29, 30 is extended by an amount equivalent to the difference L between the diameters of the large and small timing pulleys.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a belt traverse device for traversing a yarn being wound in a winder for winding the yarn.

[0002]

2. Description of the Related Art As a belt traverse device, a device shown in FIG. 4 is conventionally known. The belt traverse device is located slightly upstream of the drive drum 3 of the winder, and
A traverse guide 7, which is provided on the yarn path on the downstream side of the tensor 4 and is fixed at opposite positions to two endless timing belts 5, 6 which are superimposed in two upper and lower stages and run in opposite directions to each other; 8 and thread transfer plates 11 and 12 provided close to both sides of the front surfaces of the pulleys 9 and 10 of the timing belts 5 and 6. The grooves 3 at both ends of the drive drum 3
a and 3b are for determining the traverse end properly.

In this belt traverse device, the yarn Y drawn from the yarn supply package 1 and wound on a winding package 2 rotated by a driving drum 3 is fixed to, for example, a lower timing belt 5. It is assumed that the traverse guide 7 moves leftward. When the yarn Y reaches the left end, it moves in a direction away from the traverse guide 7 along the edge of the yarn delivery plate 11 and comes off. Then, it is scooped and engaged with the upper traverse guide 8 which has just traveled from the opposite side, and then moves to the opposite right side. Thereafter, the same is alternately repeated on the right and left sides, and a traverse is given to the yarn Y.

[0004]

In the conventional belt traverse device, since the size of both traverse guides 7 and 8 is exactly the same, both the traverse guides 7 and 8 are in the state of (3) in FIG. The portions (longer portions) of the traverse guides 7 and 8 that play the role of thread propulsion overlap vertically. At this time, when there is a tension fluctuation or the like, as shown by an arrow, if the yarn is separated from the edge of the yarn transfer plate 11,
There is a case where the delivery traverse guide 8 does not engage with the receiving side and a delivery error occurs.

It is an object of the present invention to provide a belt traversing device which does not cause a yarn delivery error even when the tension fluctuates.

[0006]

According to the belt traverse device of the present invention, traverse guides 29 and 30 are fixed at diametrically opposite positions of endless timing belts 27 and 28 which run in opposite directions in two vertical stages. ,
A thread delivery plate is provided near both sides of the front surface of the timing belt, and a timing pulley 2 on the thread receiving side is provided.
The timing pulleys 24, 2 on the yarn transfer side have diameters 3 and 26.
It is larger than the diameter of 5.

The yarn propulsion portions 29a, 30a of the traverse guides 29, 30 are made longer.

The length of the yarn propulsion portion 29a (30a) of the traverse guide 29 (30) may be made equal to the difference L in diameter between the two-diameter and small-diameter timing pulleys.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a belt traverse device according to the present invention will be described with reference to FIGS.

This belt traverse device is provided between a drive drum of a winder and a tensor, and is made of ceramics at positions directly opposite to endless timing belts 27 and 28 which run in mutually opposite directions in a two-stage stack. The traverse guides 29 and 30 are fixed, and the yarn delivery plates 11 and 12 are provided on both sides, which is the same as the conventional one.

In the present invention, first, the timing pulley 2 around which the timing belts 27 and 28 are stretched
The diameters of 3, 24, 25 and 26 are different from the conventional ones. Also, the size of the traverse guides 29, 30 is made larger than the conventional one.

A large-diameter timing pulley 23 is rotatably mounted above the left drive shaft 21.
A small-diameter timing pulley 24 is fixed below. A small-diameter timing pulley 25 is fixed to the upper side of the right drive shaft 22, and a large-diameter timing pulley 26 is rotatably mounted below. Then, the timing pulley 23 and the timing pulley 25
Of the traverse guide 30 attached to the traverse guide 29, the front side of the timing belt 27 moves rightward as indicated by the arrow, and is extended between the timing pulley 24 and the timing pulley 26. The attached timing belt 28 is configured such that the front side moves leftward as indicated by an arrow.

The positional relationship between the traverse guides 29 and 30 shown in FIG. 1 is when the yarn Y is to be passed from the traverse guide 30 to the traverse guide 29 on the left side. The latter is the one who receives. Therefore, the timing pulley 23 that receives the yarn Y
Is large, and the diameter of the timing pulley 24 to be passed is small. This relationship is the same for the right timing pulleys 25 and 26. The lengths of the timing belts 27 and 28 are the same.

The traverse guides 29 and 30 have exactly the same shape and are basically the same as the conventional one. As shown in FIG. 2, the yarn propulsion portion 29a (30a) serving as the yarn propulsion part is long, The auxiliary part 29b (30b) is shorter. However, the yarn propulsion section 29a (30a) is larger than the conventional one shown by a dotted line. The size difference L is about 2 mm, and is equal to the difference between the diameters of the timing pulley 23 and the timing pulley 24 or the difference between the diameters of the timing pulley 25 and the timing pulley 26. In addition, although the yarn propulsion part 29a (30a) may be the same as the conventional one, it is more effective to make it larger than the conventional one.

In the belt traverse device having such a configuration, for example, as shown in FIG. 3, which shows the order of yarn transfer operation, the yarn Y is guided by a traverse guide 30 fixed to the lower timing belt 28. Move to the left and reach the left end. The yarn Y is moved along the edge of the yarn transfer plate 11 by the yarn driving portion 30 of the traverse guide 30.
a in the direction away from the tip of the “a” [FIG.
(2)]. When the yarn Y comes off from 30a (FIG. 3 (3)),
Upper traverse guide 2 just running from the opposite side
9 enters the engagement state between the yarn propulsion portion 29a and the auxiliary portion 29b [FIG. 3 (4)], and moves rightward together with the traverse guide 29. Thereafter, the same operation is repeated alternately on the right and left.

As described above, since the tip of the traverse guide 29 which receives the yarn Y in the state shown in FIG. 3 (3) is located outside the tip of the traverse guide 30 which passes, even if there is a tension fluctuation or the like, the yarn Y Is securely engaged with the traverse guide 29, and there is almost no occurrence of yarn delivery mistake.

[0017]

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

That is, even if the yarn being wound has a variation in tension or the like, the yarn delivery error between the two traverse guides hardly occurs.

[Brief description of the drawings]

FIG. 1 is a front view of a belt traverse device according to the present invention.

FIG. 2 is a plan view of a traverse guide used in the belt traverse device of the present invention.

FIG. 3 is a plan view illustrating a thread delivery sequence in the belt traverse device of the present invention.

FIG. 4 is a perspective view of a conventional belt traverse device.

FIG. 5 is a plan view illustrating a yarn delivery order in a conventional belt traverse device.

[Explanation of symbols]

 23 Timing Pulley on Thread Receiving Side 24 Timing Pulley on Thread Transfer Side 25 Timing Pulley on Thread Transfer Side 26 Timing Pulley on Thread Receiving Side 27 Timing Belt 28 Timing Belt 29 Traverse Guide 29a Thread Propulsion Section 30 Traverse Guide 30a Thread Propulsion Section

Claims (3)

[Claims] 1. A traverse guide is fixed to diametrically opposite positions of endless timing belts running in opposite directions in two vertically stacked stages, and a yarn transfer plate is provided close to both sides of the front surface of the timing belt. and,
A belt traverse device in which the diameter of the timing pulley on the yarn receiving side is larger than the diameter of the timing pulley on the yarn transfer side. 2. The belt traverse device according to claim 1, wherein the yarn propulsion portion of each traverse guide is made longer. 3. The belt traverse device according to claim 1, wherein the length of the yarn propulsion portion of the traverse guide is set to be equal to the difference in diameter between the large-diameter and small-diameter timing pulleys.