EP1249421B1

EP1249421B1 - Yarn traverse device

Info

Publication number: EP1249421B1
Application number: EP02012950A
Authority: EP
Inventors: Osamu. Raionzumanshon-shugakuin 310 20 Nakagawa
Original assignee: Murata Machinery Ltd
Current assignee: Murata Machinery Ltd
Priority date: 1996-03-14
Filing date: 1997-02-24
Publication date: 2005-11-30
Anticipated expiration: 2017-02-24
Also published as: EP1197461A2; DE69734789T2; CN1184125C; TW333208U; DE69718364T2; EP1195341A3; DE69718364D1; EP1197461A3; EP1195341A2; EP1249421A1; EP0795509A1; CN1160010A; DE69734789D1; KR970065380A; KR100307328B1; EP0795509B1

Description

TECHNICAL FIELD

The present invention is related to a yarn traverse device according to the preamble of claim 1.

BACKGROUND ART

Conventionally, a yarn traverse device has been known that positions in the vertical direction at the predetermined spacing a pair of propeller shaped rotating wings arranged so that they rotate in opposite directions and that plane of rotation is parallel with respect to the axis of rotation of the touch roller or package as shown in Fig. 7. This kind of conventional yarn traverse device moves a yarn along a guide member to one edge of the guide member by one of the rotating wings rotating in a predetermined direction. In continuance, the yarn is received at one end of the guide member by one of the rotating wings that is rotating in the opposite direction to the above rotating wing and is thus moved in the opposite direction. Yarn transferal is carried out at both edges of the guide member between the two rotating wings that rotate in directions opposite to each other and thus traversing of the yarn is carried out.

Using Figure 7 being a schematic front elevation of the above mentioned conventional yarn traverse device, the problems the present invention attempts to solve will be described.

c1 is the upper rotating wing of one pair of rotating wings positioned so that they rotate in opposite directions to each other and rotates about a rotation shaft c1'. c2 is the lower rotating wing which rotates in a direction opposite to the aforementioned upper rotating wing c1 about a rotation shaft c2'. c3 is a publicly known touch roller. c4 is the package formed by the winding of yarn y on a bobbin c5 supported by a publicly known support device (not shown in the drawing). Furthermore, c6 is a yarn guide at the traverse point of the yarn y. It should be noted that for convenience, the yarn y is moved to the right by the upper rotating wing c1 and to the left by the lower rotating wing c2.

When yarn y is moved to the right by the upper rotating wing c1 and reaches the right edge transfer position A, the yarn y separates from the upper rotating wing c1 (at the yarn separating point) and connects with the lower rotating wing c2 (at the yarn coupling point) and is moved to the left. When this kind of transfer occurs at the right edge transfer position A, the distance from point a1 (the yarn coupling point a1) where the yarn y separates from the upper rotating wing c1 and connects with the lower rotating wing c2 to the contact point a2 where the yarn y contacts the touch roller c3 is the so-called yarn y free length d1.

Furthermore, when the yarn y is moved to the left by the lower rotating wing c2 and reaches the left edge transfer position B, the yarn y separates from the lower rotating wing c2 (at the yarn separating point) and connects with the upper rotating wing c1 (at the yarn coupling point) and is moved to the right. When this kind of transfer occurs at the left edge transfer position B, the distance from point b1 (in the yarn coupling point b1) where the yarn y separates from the lower rotating wing c2 and connects with the upper rotating wing c1 to the contact point b2 where the yarn y contacts the touch roller c3 is the so-called yarn y free length d2.

On the conventional yarn traverse device as described above, the free length d1 at the right transfer position A and the free length d2 at the left transfer position B are different. Thus if the free lengths at the left and right edges are different, differences in shape are generated at the left and right edges of the package c4 and the package c4 of improper shape is manufactured.

Same applies to the yarn traverse device known from DE-A-4 425 133 defining the preamble of claim 1.

SUMMARY OF THE INVENTION

The problem underlying the invention is, therefore, to provide a yarn traverse device producing packages having proper shape without differences at the left and right end surfaces.

This problem is accomplished by the features as defined in the characterizing portion of claim 1.

According to the invention the lower rotating wing transfers the yarn along a downward gradient from one to the other side or - as defined by way of example for the following description - from right to left and the upper rotating wing transfers it along an upward gradient from left to right whereas the lower rotating wing according to DE-A-4 425 133 transfer the yarn along an upward gradient from left to right and upper rotating wing transfers it along a downward gradient from right to left.

The rotating wing that is releasing the yarn determines the position and form of the end surface of a package. This is the upper rotating wing on the left side and the lower rotating wing on the right side according to DE-A-4 425 133. According to the invention the lower rotating wing releases the yarn on the left side and the upper rotating wing on the right side.

At the time of the yarn transfer from the upper wing to the lower wing on the left side according to DE-A-4 425 133 the lower rotating wing engaging the yarn is located between the upper rotating wing releasing the yarn and the touch roller and the lower rotating wing restricts the yarn to prevent the yarn releasing position of the upper rotating wing from varying, thereby maintaining the relatively stable position of the package end surface.

At the time of the yarn transfer on the right side however, the upper rotating wing engaging the yarn is located above the lower rotating wing releasing the yarn and the yarn is not restricted between the lower rotating wing releasing the yarn and the touch roller, resulting in the variation of the yarn releasing position of the lower rotating wing. This variation directly leads to the variation of the package end surface during the yarn transfer on the right side.

At the time of the yarn transfer on the right side according to the invention the lower rotating wing engaging the yarn is located between the upper rotating wing releasing the yarn, and the lower rotating wing restricts the yarn to prevent the yarn releasing position of the upper rotating wing from varying, thereby maintaining the relatively stable position of the package end surface.

At the time of the yarn transfer on the left side however the yarn is not restricted between the lower rotating wing releasing the yarn at the touch roller, resulting in the variation of the yarn releasing position of the lower rotating wing.

The comparison of the distance between the yarn releasing position and the touch roller at the time of the yarn transfer on the left side according to the invention and on the right side according to DE-A-4 425 133, however, shows that the distance between the position of the lower rotating wing releasing the yarn and the touch roller according to the invention is smaller than the distance between the position of the lower rotating wing releasing the yarn and the touch roller according to DE-A-4 425 133.

Due to this reduced distance between the position of the rotating wing and the touch roller at the time of the yarn transfer packages may be produced that have good end surfaces on both sides.

BRIEF DESCRIPTION OF THE DRAWINGS

Figure 1 is a top plan view of the yarn traverse device of the present invention.

Figure 2 is a vertical sectional view along the line II-II of Figure 1 of the yarn traverse device of the present invention.

Figure 3 is a schematic front view of the yarn traverse device of the present invention.

Figure 4 is a schematic front view of a plurality of yarn traverse devices of the present invention arranged in combination.

Figure 5 is a schematic front view of a plurality of the yarn traverse device of a second embodiment of the present invention arranged in combination.

Figure 6 is a schematic front view of the yarn traverse device of a third embodiment of the present invention.

Figure 7 is a schematic front view of a conventional yarn traverse device.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

Henceforth an embodiment of the present invention will be described but, provided the aims are not surpassed, the present invention is not limited to the present embodiment.

Firstly, using Figures 1, 2 and 3, a yarn traverse device U of the present invention will be described.

1 is a propeller shaped upper rotating wing extending to points symmetrical with respect to a center of rotation 1a. The upper rotating wing 1 is mounted by a suitable attachment means such as a screw 6 or the like to a rotating cylinder 5 positioned via a bearing 4 on the periphery of a cylindrical frame 3 mounted on a flat frame 2. 7 is a propeller shaped lower rotating wing positioned below the upper rotating wing 1, having a length the same as the upper rotating wing 1 and extending to points symmetrical with respect to a center of rotation 7a separated only by a predetermined eccentric distance e from the center of rotation 1a of the upper rotating wing 1. The lower rotating wing 7 is mounted by a suitable attachment means such as a screw 10 or the like on the lower part of a rotating shaft 9 positioned via a bearing 8 inside the cylindrical frame 3.

11 is a guide member mounted above the upper rotating wing 1 for forming the traverse path of a yarn y. The tips of the upper rotating wing 1 and lower rotating wing 7 are so arranged that they project from an arc shaped yarn guide surface 11a of the guide member 11. Furthermore, the eccentric distance e on the line joining the center of rotation 1a of the upper rotating wing 1 and the center of rotation 7a of the lower rotating wing 7 is positioned approximately in line with the yarn guide surface 11a of the guide member 11. It should be noted that arrangement of the guide member 11 below the lower rotating wing 7 or between the upper rotating wing 1 and the lower rotating wing 7 are possible.

A spur gear 12 is mounted on the outer periphery of the rotating cylinder 5 positioned via the bearing 4 on the periphery of the cylindrical frame 3. A spur gear 16 mounted on the lower end of a rotating shaft 15 positioned via a bearing 14 inside the cylindrical frame 13 mounted on the plate frame 2 engages with that spur gear 12. 17 is a pulley mounted on the upper part of the rotating shaft 15. A spur gear 18 is mounted on the rotating shaft 15 positioned between the pulley 17 and the spur gear 16, and a spur gear 20 mounted on a rotating shaft 19 positioned via a bearing inside the cylindrical frame (not shown in the drawings) mounted on the plate frame 2 similar to the aforementioned cylindrical frame 13 engages with that spur gear 18. Furthermore, the spur gear 20 engages with a spur gear 21 mounted on the upper part of rotating shaft 9 to which the lower rotating wing 7 is attached.

As shown in Figure 3, the plane of rotation of the upper rotating wing 1 and the plane of rotation of the lower rotating wing 7 are slanted by a predetermined angle with respect to line of the axis of rotation t1 of the publicly known touch roller T positioned below the upper rotating wing 1 and the lower rotating wing 7 or with respect to the line of the axis of rotation p1 of the package P which contacts the touch roller T. This slanting is to a degree such that the free length (d1) of the yarn y at the right edge transfer position (A) and the free length (d2) of the yarn y at the left edge transfer position (B) as explained for the conventional traverse devices is the same. In short, the upper rotating wing 1 and the lower rotating wing 7 are slanted with respect to the line of the axis of rotation t1 of the touch roller T or the line of the axis of rotation p1 of the package P so that the free length (d1) of the yarn y from the coupling point (a1) where the yarn y separates from the upper rotating wing 1 and couples with the lower rotating wing 7 to the contact point (a2) where the yarn y contacts the touch roller T when yarn y is transferred from the upper rotating wing 1 to the lower rotating wing 7 at the right transfer position (A), and the free length (d2) from the coupling point (b1) where the yarn y separates from the lower rotating wing 7 and couples with the upper rotating wing 1 to the contact point (b2) where the yarn y contacts the touch roller T when yarn y is transferred from the lower rotating wing 7 to the upper rotating wing 1 at the left transfer position (B) are the same. It should be noted that g in Figure 3 is the yarn guide is the traverse fulcrum of the yarn y.

Next, the traverse actions and driving and the like of the yarn y of the yarn traverse device having the above described structure will be described.

When the pulley 17 rotates due to a drive belt (not shown in the drawings), the spur gear 12 which engages with the spur gear 16 rotates via that spur gear 16 mounted on the lower end of the rotating shaft 15 to which is attached pulley 17. When spur gear 12 rotates, the rotating shaft 5 on which the spur gear 12 is mounted rotates and consequently, the upper rotating wing 1 which is attached to the rotating shaft 5 rotates.

Furthermore, as previously described, when the pulley 17 rotates due to the drive belt (not shown in the drawings), the spur gear 20 which engages with spur gear 18 rotates via that the spur gear 18 mounted in the middle of the rotating shaft 15 to which is attached the pulley 17. When the spur gear 20 rotates, as the spur gear 21 which engages with the spur gear 20 rotates, the rotating shaft 9 on which the spur gear 21 is mounted rotates and consequently, the lower rotating wing 7 which is attached to the rotating shaft 9 rotates.

As previously described, the rotation of the pulley 17 is transmitted to the upper rotating wing 1 via the spur gear 16 and the spur gear 12. As the rotation of the pulley 17 is transmitted to the lower rotating wing 7 via the spur gear 18, the spur gear 20 and the spur gear 21, the upper rotating wing 1 and the lower rotating wing 7 rotate in opposite directions to each other.

For convenience, the upper rotating wing 1 rotates in a counter clockwise direction in Figures 1 and 3 and the lower rotating wing 7 is shown to rotate in a clockwise direction. Also, in Figure 1, the point in time is shown where the yarn y has been transferred along the yarn guide surface 11a of the yarn guide member 11 from one tip 1b of the upper rotating wing 1 which has moved from the left edge of the guide member 11 to the right edge to one tip 7b of the lower rotating wing 7 that is positioned at the right edge of the guide member 11 and is rotating in a clockwise direction.

The yarn y which has been transferred to one tip 7b of the lower rotating wing 7 is moved from the right edge to the left edge of the guide member 11 along the yarn guide surface 11a of the guide member 11. Then, the yarn y which has been moved from the right edge to the left edge of the guide member 11 by one tip 7b of the lower rotating wing 7 is transferred from one tip 7b of the lower rotating wing 7 to one tip 1c of the upper rotating wing 1 that has rotated to the left edge of the guide member 11 and is rotating in a counter clockwise direction. This yarn y is then moved to the right along the yarn guide surface 11a of the guide member 11.

Then, the yarn y which has been moved from the left edge to the right edge of the guide member 11 by one tip 1c of the upper rotating wing 1 is transferred from one tip 1c of the upper rotating wing 1 to one tip 7c of the lower rotating wing 7 that has rotated to the right edge of the guide member 11 and is rotating in a clockwise direction and this yarn y is then moved to the left along the yarn guide surface 11a of the guide member 11. In this way, the yarn y is traversed along the yarn guide surface 11a of the guide member 11 by the transferral from the upper rotating wing 1 to the lower rotating wing 7 or the lower rotating wing 7 to the upper rotating wing 1 at both edges of the guide namer 11.

In the present invention, as the plane of rotation of the upper rotating wing 1 and the plane of rotation of the lower rotating wing 7 of the yarn traverse device U are slanted with respect to the line of the axis of rotation t1 of the touch roller T or the line of the axis of rotation p1 of the package P so that the free length (d1) of the yarn y at the right transfer position (A), and the free length (d2) of the yarn y at the left transfer position (B) are the same, the package P of good shape with the left and right edges of the package P being the same may be produced.

Next, using Figure 4, the arrangement in series along the touch roller T of a plurality of yarn traverse units U having the above mentioned structure will be described.

In the present embodiment, yarn traverse devices U are arranged in series such that the upper rotating wing 1 and lower rotating wing 7 of the yarn traverse device U positioned on the right is positioned below the upper rotating wing 1 and lower rotating wing 7 of the yarn traverse device U positioned on the left side. Also, not only are the planes of rotation of the upper rotating wing 1 or the planes of rotation of the lower rotating wing 7 of adjacent yarn traverse devices U positioned so as to each partially overlap, the four planes of rotation being the plane of rotation of the upper rotating wing 1 and the plane of rotation of the lower rotating wing 7 of one yarn traverse device U and the plane of rotation of the upper rotating wing 1 and the plane of rotation of the lower rotating wing 7 of another yarn traverse device U comprising adjacent yarn traverse devices U are arranged so as to be all different.

A drive belt b is wound on the pulley 17 attached to the rotating shaft 15 of each yarn traverse device U and the pulley 17 is rotated by the running of the drive belt b by a motor (not shown in the drawing) thus driving each yarn traverse device U. It should be noted that the rectangle s shown below the plate frame 2 in Figure 4 is a simplification of the drive part of the upper rotating wing 1 and the lower rotating wing 7 comprising the spur gears 12, 16, 18, 20, 21 etc. described using Figures 1 and 2.

In the above described embodiment, as the planes of rotation of the upper rotating wing 1 or planes of rotation of the lower rotating wing 7 of adjacent yarn traverse devices U are positioned so as to each partially overlap, adjacent yarn traverse devices U may be arranged in close proximity to each other and accordingly, when a plurality of yarn traverse devices U are arranged in series, the entire length of the yarn traverse device U may by shortened.

Furthermore, in the above described embodiment, as the four planes of rotation being the plane of rotation of the upper rotating wing 1 and the plane of rotation of the lower rotating wing 7 of one yarn traverse device U and the plane of rotation of the upper rotating wing 1 and the plane of rotation of the lower rotating wing 7 of another yarn traverse device U comprising adjacent yarn traverse devices U are arranged so as to be all different, even if one yarn traverse device U becomes faulty and the rotation of the

rotating wings

1, 7 stop or a differences is generated between the rotational velocity of the

rotating wings

1, 7 of one yarn traverse device U with the rotational velocity of the

rotating wings

1, 7 of another yarn traverse device U, there is no interference or collision between the

rotating wings

1, 7 of adjacent yarn traverse devices U.

Yet further, as the plane of rotation of the upper rotating wing 1 and the lower rotating wing 7 of each yarn traverse device U are slanted with respect to the line of the axis of rotation t1 of the touch roller T or the line of the axis of rotation p1 of the package P so that the free length (d1) of the yarn y at the right transfer position (A), and the free length (d2) of the yarn y at the left transfer position (B) are the same, the package P of good shape with the left and right edges of the package P being the same may be produced.

Yet further still, as the height from the touch roller of the plurality of yarn traverse devices arranged in series is the same at all the yarn traverse devices U, there is no dispersion of the traversed state at each yarn traverse device U and accordingly a package of uniform shape may be produced.

Next, using Figure 5, another embodiment of the plurality of yarn traverse devices U having the above described structure arranged in combination along the touch roller T will be described.

In this embodiment, the plane of rotation of the lower rotating wing 7 of the yarn traverse device U positioned on the left side and the plane of rotation of the upper rotating wing 1 of the yarn traverse device U positioned on the right side are positioned in the same plane, so that they partially overlap and moreover the direction of rotation of the lower rotating wing 7 of the yarn traverse device U positioned on the left side and the direction of rotation of the upper rotating wing 1 of the yarn traverse device U positioned on the right side is the same direction. The lower rotating wing 7 of the yarn traverse device U positioned on the left side and the upper rotating wing 1 of the yarn traverse device U positioned on the right side which both rotate in the same direction have a suitable rotational phase difference such as 45 degrees or 90 degrees or the like so that they do not interfere with each other when rotating.

On the aforementioned embodiment, the plane of rotation of the upper rotating wing 1 and the lower rotating wing 7 of each yarn traverse device U are slanted with respect to the line of the axis of rotation t1 of the touch roller T or the line of the axis of rotation p1 of the package P so that the free length (d1) of the yarn y at the right edge transfer position (A), and the free length (d2) of the yarn y at the left edge transfer position (B) are the same and the heights of each yarn traverse device U from the touch roller T are constructed to be all the same thus there is no dispersion of the traversed state at each yarn traverse device U and accordingly a package of uniform shape may be produced.

Next, using Figure 6, yet another embodiment of a yarn traverse device having a plurality of yarn traverse units U will be described.

In this embodiment, a plurality of yarn traverse units U are positioned along the touch roller T such that, for two adjacent yarn traverse units U, the upper rotating wing 1 of the yarn traverse unit U positioned on the right is inserted between the upper rotating wing 1 and the lower rotating wing 7 of the yarn traverse unit U positioned on the left. Accordingly, the plane of rotation of the upper rotating wing 1 and the lower rotating wing 7 of one of two adjacently positioned yarn traverse units U and the plane of rotation of the upper rotating wing 1 and the lower rotating wing 7 of the other yarn traverse device U partially overlap when viewed from above. In this way, the four planes of rotation being the plane of rotation of the upper rotating wing 1 and the plane of rotation of the lower rotating wing 7 of one yarn traverse unit U and the plane of rotation of the upper rotating wing 1 and the plane of rotation of the lower rotating wing 7 of another yarn traverse device U comprising adjacent yarn traverse devices U are arranged so as to be all different.

In the present embodiment, when the yarn traverse device is viewed from the front, the plane of rotation of the upper rotating wing 1 and the lower rotating wing 7 of each yarn traverse unit U is arranged so as to be slanted at a predetermined angle with respect to the line of the axis of rotation t1 of the touch roller T or the line of the axis of rotation p1 of the package P. Accordingly, as the distance of each yarn traverse unit U from the line of the axis of rotation t1 of the touch roller T or the line of the axis of rotation p1 of the package P are approximately the same, the traverse conditions of each yarn traverse unit U may be approximately uniform.

Furthermore, each pulley 17 of the yarn traverse group G1 comprising a predeterined number of adjacent yarn traverse units U (in the present embodiment, the yarn traverse group G1 comprises the three yarn traverse units on the left) are positioned so as to be within the same plane. Each pulley 17 is rotated by one drive belt b1 running the length of the common plane and wound on each pulley 17 and as described before, the upper rotating wing 1 and the lower rotating wing 7 are arranged so as to rotate in opposite directions to each other. Similarly, each pulley 17 of the yarn traverse group G2 comprising the same predeterined number of yarn traverse units U and being adjacent to that yarn traverse group G1 are also positioned so as to be within the same plane and each pulley 17 is rotated by one drive belt b2 running the length of the common plane and wound on each pulley 17. It should be noted that the pulley 17 may be a sprocket and the drive belt b2 may be a chain that is wound on the sprocket.

M is a height adjustment pulley member arranged between the two adjacent yarn traverse unit groups G1, G2 and positioned below and above of which are attached pulleys m1, m2 which are capable of rotating. The pulley m1 positioned above is positioned so that it is in the same plane as each pulley 17 positioned in the same plane of the yarn traverse unit group G1. The drive belt b1 that runs the length of the common plane is wound on the pulley m1 positioned above. Also, the pulley m2 positioned below is positioned so that it is in the same plane as each pulley 17 positioned in the same plane of the yarn traverse unit group G2. The drive belt b2 that runs the length of the common plane is wound on the pulley m2 positioned below.

As described above, the drive belt b1 of the yarn traverse unit group G1 is linked to the drive belt b2 of the adjacent yarn traverse unit group G2 via the height adjustment pulley member M. Accordingly, the drive force from the drive source such as a motor or the like (not shown in the drawing) is transmitted to the drive belt b1 of the yarn traverse unit group G1 and is then transmitted to the drive belt b2 of the adjacent yarn traverse unit group G2 via the height adjustment pulley member M. In this way, the drive force from the drive source is sequentially transmitted to the adjacent yarn traverse unit group. It should be noted that the rectangle d shown below the plate frame 2 in Figure 6 is a simplification of the drive part of the upper rotating wing 1 and the lower rotating wing 7 comprising the spur gears 12, 16, 18, 20, 21 etc. described using Figures 1 and 2.

When all of the pulleys 17 of the yarn traverse units U are rotated by a single drive belt, the distance h from the line of the axis of rotation of the touch roller T to the pulley 17 of the yarn traverse unit U becomes as large as that at the yarn traverse unit U positioned to the right. Accordingly, the length of the rotating shaft 15 on which is mounted the pulley 17 must be changed at every yarn traverse unit U. Further, if the length of the rotating shaft 15 becomes longer, a shape deformation of the rotating shaft 15 occurs due to the load from the drive belt and problems such as eccentric rotation arise.

In the present embodiment as described above, the plurality of yarn traverse units U are so arranged that, when the yarn traverse device is viewed from the front, the plane of rotation of the upper rotating wing 1 and the lower rotating wing 7 of each yarn traverse unit U is arranged so as to be slanted at a predetermined angle with respect to the line of the axis of rotation t1 of the touch roller T or the line of the axis of rotation p1 of the package P. The yarn traverse units U arranged in this way are divided into yarn traverse unit groups G1, G2 comprising a predetermined number of yarn traverse units U. As the drive belts b1,b2 of adjacent yarn traverse unit groups G1, G2 are connected via the height adjustment pulley member M, there is no requirement to change the length of the rotating shaft 15 of all the yarn traverse units U and a few or small number of yarn traverse units U of different types having different lengths of the rotating shaft 15 may be prepared.

When the yarn traverse unit groups G1, G2 are comprised of 3 yarn traverse units U as in the present embodiment, a yarn traverse device arranged with a plurality of yarn traverse units U may be arranged if yarn traverse units U having three types of the rotating shaft 15 of differing lengths are provided. Further, as the drive belts b1, b2 of adjacent yarn traverse unit groups G1, G2 are linked by the height adjustment pulley member M, the rotating shaft 15 to which is attached the pulley 17 need not be long and accordingly, there is deformation of the rotating shaft 15 due to loads from the drive belts b1, b2.

Claims

A yarn traverse device for use with a yarn winder comprising a plurality of yarn traverse units (U) each having an upper rotating wing (1), a lower rotating wing (7), which rotate in opposite directions and which are slanted with respect to the axis of rotation of a touch roller (T) or a package (P), which overlap partially with the wings of adjacent traverse units (U), the rotational centers of which are offset to each other, which have respectively a yarn coupling point (a1, b1) and a yarn separating point on the left and right ends of the yarn traverse path and the yarn coupling points (a1, b1) of which define free yarn lengths (d1, d2) from the coupling points to the yarn contact points (a2, b2) on the touch roller (T),
characterized in that,
the upper and lower rotating wings (1, 7) are slanted in the direction so that the free lengths (d1, d2) concerning the yarn coupling points (a1, b1) on the left and right ends of the yarn traverse path are the same.
A yarn traverse device according to claim 1
characterized in that,
the lower rotating wing (7) transfers the yarn along a downward gradient and the upper rotating wing (1) transfers it along an upward gradient.
A yarn traverse device according to claim 1 or 2
characterized in that,
a height adjustment pulley member (M) having two pulleys (m1, m2) which rotate in unison is arranged between yarn traverse unit groups (G1, G2) comprising a plurality of yarn traverse units (U) and the yarn traverse units (U) of one yarn traverse unit group (G1) are driven by a drive belt (b1) wound on one pulley (m1) of the height adjustment pulley member (M) and the yarn traverse units (U) of the other yarn traverse unit group (G2) are driven by a drive belt (b2) wound on the other pulley (m2) of the height adjustment pulley member (M).