Winding – tensioning – or guiding – Helical or random winding of material – Alternately or sequentially wound spools
Reexamination Certificate
2000-04-27
2003-10-07
Walsh, Donald P. (Department: 3653)
Winding, tensioning, or guiding
Helical or random winding of material
Alternately or sequentially wound spools
C242S474500, C242S476400, C242S476500
Reexamination Certificate
active
06629660
ABSTRACT:
TECHNICAL FIELD
The present invention relates to a method for winding synthetic fibers, a synthetic fiber winding apparatus, and a method for using a yarn package.
In more detail, the present invention relates to a technique for winding a yarn around a yarn winding bobbin without winding the initially straight-wound yarn tail bunch destined to be wasted later, positioned outside said yarn package, for getting rid of the tail bunch removing work, at a high successful bobbin-to-bobbin yarn transfer rate, and a technique incidental to said technique, for forming a yarn tail (transfer tail) with a proper length without splitting the tail, furthermore a technique for preventing the yarn end of a wound yarn package from slipping from the surface of the wound yarn package, and, in addition, a technique for carrying out the tail splicing work simply when using the package (for weaving or yarn processing, etc.).
BACKGROUND ART
A general winding machine with a mechanism for automatically transferring yarns from yarn winding bobbins to other yarn winding bobbins is described below in reference to
FIGS. 1 and 2
, and
3
through
7
.
FIG. 1
is a schematic front view showing a multiple-yarn winding machine.
FIG. 2
is a schematic side view showing a multiple-yarn winding machine.
FIGS. 3
to
7
are schematic drawings expressing the action of automatic transfer of one yarn from a wound yarn package to an empty bobbin in time series. A winding machine
1
is composed of a turret plate
3
rotatably installed in a machine casing, two spindles
4
rotatably installed on the turret plate
3
, a traverse fulcrum guide
20
for directing the yarn to a traverse device
5
installed above one of the spindles
4
, yarn winding empty bobbins
16
mounted around the spindle
4
, a contact pressure roller
6
for giving a predetermined face pressure to the yarns wound around the bobbins while being kept in contact with them, an upper yarn transfer mechanism
7
provided above the contact pressure roller
6
, a yarn passage control mechanism
8
provided between the two spindles
4
for controlling the yarn passages when the yarns are transferred from wound yarn bobbins
17
to the empty bobbins
16
, and a lower yarn transfer mechanism
12
provided between the empty bobbins
16
and the yarn passage control mechanism
8
for winding the yarns around the empty bobbins
16
. The upper yarn transfer mechanism
7
is composed of yarn shift guides
9
moving in the traverse direction of a traverse guide for shifting the yarns outside the respective regular traverse areas to tail bunching positions and tail winding positions, and a drive source (not illustrated) for these actions. The yarn passage control mechanism
8
is composed of a yarn passage control guide
10
for controlling the yarn passages lest the yarns should contact the peripheral surfaces of the empty bobbins when the empty bobbins
16
at the standby position move to the winding position, and surface yarn bunching guides
11
for guiding the yarn passages toward the surface yarn bunching positions on the surfaces of the yarns wound around the fully wound packages
17
.
The lower yarn transfer mechanism
12
is composed of initial winding guides
13
for guiding the yarns running between the yarn shift guides
9
and the yarn passage control guide
10
into contact with the peripheral surfaces of the empty bobbins
16
and moving the yarns in the axial direction of the empty bobbins
16
to let yarn holding portions
23
provided in the empty bobbins
16
hold the yarns, and arms
13
′ (not illustrated) for actuating the initial winding guides
13
between the standby position and the winding position.
When the winding machine as mentioned above is used to change the yarns from the wound yarn packages
17
to the empty bobbins
16
, the turret plate
3
is at first rotated 180 degrees clockwise, to move the wound yarn packages
17
at the winding position to the standby position, and to move the empty bobbins
16
at the standby position to the winding position.
At this time, as shown in
FIG. 3
, the yarn passage control guide
10
of the yarn passage control mechanism
8
is interlocked with the rotation of the turret
3
(not illustrated), to disengage the yarns from the traverse guide (not illustrated) and controls and supports the yarn passages lest the yarns should contact the peripheral surfaces of the empty bobbins
16
.
Then, as shown in
FIG. 4
, the yarn shift guides
9
of the upper yarn transfer mechanism
7
carry the yarns outside the respective regular traverse areas, and the surface bunching guides
11
of the yarn passage control mechanism
8
let the yarns travel toward the surface bunching positions on the yarn windings of the wound yarn packages
17
.
Then, as shown in
FIG. 5
, the initial winding guides
13
of the lower yarn transfer mechanism
12
(not illustrated) move into the space between the empty bobbins
16
and the yarn passage control mechanism
8
, and as a result, the running yarns controlled in their passages by the yarn shift guides
9
of the upper yarn transfer mechanism (not illustrated) and the surface bunching guides
11
of the lower yarn transfer mechanism
8
are brought into contact with the peripheral surfaces of the empty bobbins
16
by the initial winding guides
13
and are moved in the axial direction of the empty bobbins
16
, being introduced into and held by the yarn holding portions
23
provided in the circumferential direction of the empty bobbins
16
at the ends on one side of the empty bobbins
16
. If the yarns are held, since both the fully wound packages
17
and the empty bobbins
16
rotate in the yarn winding direction, the yarns are cut in the space between the wound yarn packages
17
and the empty bobbins
16
, and are transferred from the wound yarn packages
17
to the empty bobbins
16
.
Then, as shown in
FIG. 6
, since the yarns are guided to shift toward the tail bunching positions of the empty bobbins by the yarn shift guides
9
, the yarns coming out of the yarn holding portions move on to the peripheral surfaces of the empty bobbins
16
, to form tail bunches at the predetermined winding positions.
Then, as shown in
FIG. 7
, after predetermined lengths of tail bunches have been wound, as the yarn shift guides
9
return toward the opposite ends of the bobbins, the yarns move toward the centers of the traverse areas while forming their tails, and are taken over by the traverse guide (not illustrated), to be wound in traverse.
As described above, in the automatic bobbin-to-bobbin yarn transfer according to the above mentioned conventional winding method and apparatus, after the yarns have been transferred to the empty bobbins, the yarn shift guides
9
of the upper yarn transfer mechanism
7
which support the yarns at the tail bunching positions against the force to move the yarns toward the centers of the traverse areas cause the yarns held by the empty bobbins
16
to be wound right under the yarn shift guides
9
, to form tail bunches without fail. As a result, the formed tail bunches must be removed later, and this has been an extra burden of working.
Apart from the above apparatus, Japanese Patent Laid-Open (Kokai) No. Sho62-280172, Japanese Patent Publication (Kokoku) No. Sho57-36233 and Japanese Patent Laid-Open (Kokai) No. Hei6-321424 propose other turret type automatic winding machines, but all of these machines have the same problem as described above, since the yarn is supported against the force to move the yarn toward the center of the traverse area after it has been transferred to an empty bobbin, a tail bunch is formed without fail.
On the other hand, a winding apparatus without forming the tail bunch proposed in Japanese Patent Laid-Open (Kokai) No. Sho54-114674 is known.
However, with this apparatus, the yarn passage for introducing a yarn into a yarn holding groove extending in the circumferential direction in the surface of an empty bobbin is oblique to the yarn holding groove. As a result, the yarn cannot be reliably held, and it is
Nakajima Hirotaka
Saijo Teruaki
Sonoyama Katsumi
Suzuki Tamotsu
Yamaguchi Sumio
Piper Rudnick LLP
Rodriguez Joseph C
Toray Industries Inc.
Walsh Donald P.
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