Title of Invention

WINDER TUBE COUPLING FOR A SPINNING OR TWISTING SPINDLE

Abstract A winder tube coupling for a spinning or twisting spindle is described, in which the taking along of the winder tube by the spindle upper part is effected by means of a positive coupling connection comprising recesses and projections. The recesses take the form of longitudinal grooves arranged on the spindle upper part, while the projections take the form of cylindrical pegs arranged on the winder tubes, which pegs engage with the longitudinal grooves. The pegs are disposed during spindle operation towards the spindle tip on a stopping surface which causes the longitudinal grooves to narrow. A cap comprising the longitudinal grooves is preferably positioned on the spindle upper part.
Full Text BACKGROUND AND SUMMARY OF THE INVENTION
Winder tube coupling for a spinning or twisting spindle
The present invention relates to a winder tube coupling on a spinning or twisting spindle in
which the taking along of the winder tube by the spindle upper part is effected by a
connection having positive fit which comprises recesses and projections.
It is known that the winder tube is centred by spring elements and simultaneously taken
along. It is also known that the centring and taking along of the winder tube is achieved by
coupling members under the action of centrifugal forces. In both variations it is possible to
generate a frictional connection or a positive coupling connection of the winder tube coupling,
if required also a frictional connection and a positive coupling simultaneously. It is, however,
disadvantageous that such winder tube couplings require additional components which can
be lost during operation of the spindle, apart from the fact that they are very complicated in
design.
A winder tube coupling for a connection having positive fit of the above mentioned type is
known, for example, from German published application 41 31 498. In the case of these
winder tube couplings, cap-like buttons are located on the outer circumference of the spindle
upper part, which cap-like buttons can be disposed on a longitudinal groove of the winder
tube by means of centrifugal forces.
It is an object of the present invention to create a winder tube coupling of the above
mentioned type having a connection with positive fit between the winder tube and the
spindle, whereby radially movable parts, which act under the forces of springs or centrifugal
forces, can be omitted.
This object has been achieved in accordance with the present invention in that the recesses
take the form of longitudinal grooves arranged on the spindle upper part and that the
projections take the form of pegs arranged on the winder tube, which pegs engage with the
longitudinal grooves, which pegs are disposed during spindle operation towards the spindle
tip on a stopper surface which narrows the longitudinal groove.
By means of the present invention, a winder tube coupling is created in which, as in prior art,
a taking along having a positive fit is ensured. In contrast to prior art, there are no parts on
the spindle upper part which are radially movable by means of spring or centrifugal forces.
Thus, in circumferential direction of the spindle a good taking-along of the winder tube is
achieved during rotation of the spindle upper part. In addition, the stopping surface, which
narrows the longitudinal groove, ensures that the winder tube does not travel upwards
towards the spindle tip due to the yarn pulling force of the winding-on yarn which prevails
during operation. It is, of couse, self-explanatory that the slit width must be larger than the
diameter of the peg: The advantage is that aH complicated forms present on the winder tube
coupling are located on the spindle upper part, whereas the winder tube need only comprise
a peg - or a plurality of pegs - which are simple to produce.
The above mentioned stopping surface may be formed by a wall which borders the
longitudinal groove. This results not only in a particularly simple manufacture, but also
ensures a continuous lateral border of the longitudinal groove. In order to be independent of
the rotational direction of the spindle, it is advantageous when the longitudinal groove
comprises a stopping surface in both spindle rotational directions. This results also in a
symmetrical manufacture of the winder tube coupling.
As the winder tube coupling must be suitable for automatic doffing processes, and in
particular for automatic positioning of the winder tube on the spindle upper part, attention
must be paid that the winder tube does not lock either during positioning nor when it is
removed. It is furthermore favourable when the winder tube is being removed from the
spindle upper part that the shut down spindle can turn a little in circumferential direction.
This is the case anyway in modem spindle drives, and it is presumed to be the case in the
present invention.
In an embodiment of the present invention, the wall forming the stopping surface takes the
form of a slanted sliding surface for the peg when the winder tube is removed from the
spindle upper part. Taking advantage of the spindle mobility in circumferential direction
definitely prevents any self-locking, so that the automatic removal of the winder tube from the
spindle upper part is not blocked. On the other hand, the sliding surface should not, of
course, be too slanted as it should act, according to the present invention, as a resistance
against yarn pulling forces during operation. As the doffer forces for removing the winder
tube are in any case greater than the yarn pulling forces, the exact slant of the sliding
surfaces can be determined by simple tests. An angle of approximately 60° in relation to the
plane of rotation of the spindle has proved to be favourable.
It is further favourable when the sliding surface has a definite curvature. For example, a
convex radius of approximately 2 mm can be involved. When the winder tube is removed
from the spindle upper part, the peg of the winder tube can move along over the curve
towards the spindle tip.
In order facilitate the sliding of the peg as much as possible when the winder tube is removed
from the spindle upper part, it is purposeful when the peg has a curved or an oval cross
section. Overall, the peg can take the form of a cylindrical pin or a hemisphere.
In a further embodiment of the present invention, the longitudinal grooves taper in the
direction of the stopping surface. This results in a very long entry slant for the pegs when the
winder tube is positioned on the spindle, so that self-locking is in any case avoided. An angle
between 15° and 18° between the lateral walls has proven to be practical for the present
invention.
In order to facilitate the positioning of the winder tube on the spindle upper part, it is practical
when more longitudinal grooves than pegs are present, taking into consideration, however,
that as few as possible balance errors occur. For the purpose of the invention, the number of
longitudinal grooves is many times that of the number of pegs. For example, six longitudinal
grooves and three pegs have proven to be advantageous.
It is further practical when the lateral walls of two adjacent longitudinal grooves extend
wedge-shaped towards one another in the direction of the spindle tip. Between every two
longitudinal grooves starting at the spindle tip, a blade-like tip arises, so that a peg does not
collide with a wall when the winder tube is positioned, but rather locates the longitudinal
groove.
The base surfaces of the longitudinal grooves are advantageously straight und polygonal, for
example, in the fom of a hexagon. This results in a particularly simple manufacturing
process.
Alternatively, the base surfaces can be concavely curved. Thus the pegs of the winder tube
can be disposed on the spindle upper part when the spindle is rotating even with a prevailing
tolerance-based clearance for centering the winder tube.
In a particularly advantageous embodiment of the present invention, a spindle cap
comprising the longitudinal grooves is provided and placed on the spindle upper part. This
results in not only a cost-effective production process, but the spindle can be easily adapted
to various formats and diameters of winder tubes.
Although not absolutely necessary, it can be purposeful in certain circumstances when the
longitudinal grooves are provided at the end facing away from the spindle tip with an end
wall. Usually the winder tube is supported on its lower end, which faces away from the
spindle tip, on a stopping surface of the spindle upper part. A further variation can be,
however, that the winder tubes are supported alternatively via the pegs on the end wall and
thus can be disposed securely in axial direction.
According to the present invention, it is provided in addition to the described embodiments
that a winder tube as well as a spinning or twising spindle for application in the described
winder tube coupling is also claimed.
BRIEF DESCRIPTION OF THE DRAWINGS
These and further objects, features and advantages of the present invention will become
more readily apparent from the following detailed description thereof when taken in
conjunction with the accompanying drawings wherein:
Figure 1 is a part intersectional longitudinal view of a spindle upper part with a winder tube
positioned thereon, almost in original size,
Figure 2 in enlarged dimensions is a partial view of the spindle upper part of Figure 1 without
the winder tube in the area of the winder tube coupling,
Figure 3 is a cross section of the spindle upper part along the intersectional 3urface Ill-Ill of
Figure 2, with a positioned winder tube,
Figure 4 in greatly enlarged dimensions is a partial view of Figure 2,
Figure 5 is a partial view of a spindle upper part comprising a separate spindle cap, shown in
part in intersection, which serves the winder tube coupling,
Figure 6 is the spindle cap of Figure 5 from the outside,
Figure 7 is a cross-section of the spindle upper part comprising the spindle cap along the
intersectional surface VII-VII of Figure 6, with positioned winder tube.
DETAILED DESCRIPTION OF THE DRAWINGS
The spindle upper part 1 of a spinning or twisting spindle 2 is shown in Figure 1 in
longitudinal view. The spindle upper part 1 graduates in its lower area into a conical
supporting surface 3, to which in a known way the wharve drive (not shown) and the spirtdie
shaft (not shown) are annexed. In the upper area of the spindle upper part 1 a winder tube
coupling 4 is provided, which is described in more detail below.
A winder tube 5 is positioned on the spindle upper part 1, which tube 5 is shown in
longitudinal section. The winder tube 5 is supported below on the conical supporting surface
3 or on a stopping surface and is thus centred in its lower area. The winder tube 5 is taken
along during operation of the spindle 2 by the rotating spindle upper part 1 in the same
direction.
When the winder tube 5 is placed on the spindle upper part 1, it is often the case that the
winder tube 5 is let fall down the remaining 50 mm. This can be done in the case of manual
doffing and in the case of automatic doffing. Alternatively, the winder tube 5 can be guided
onto the spindle upper part 1.
The winder tube coupling 4 according to the present invention is described below with the aid
of the enlarged Figures 2,3 and 4.
The winder tube coupling 4 functions without radially movable parts and is a connection
having a positive fit, which connection acts with recesses 6 on the spindle upper part 1 and
projections 7 on the winder tube 5. The spindle rotation direction is denoted by the letter A.
Six recesses 6 are provided overall, which take the form of longitudinal grooves 8. Three
projections 7 are provided in contrast in the form of three pegs 9. The pegs 9 engage during
operation in the longitudinal grooves 8 and are taken along in longitudinal direction A by
means of form closure.
In the end areas facing away from the spindle tip 10, the intially tapering longitudinal grooves
8 widen out in an undercut so that in both circumferential directions stopping surfaces 11 and
13, which narrow in the longitudinal grooves 8, are formed. The longitudinal groove 8 must,
of course, at its narrowest point, be wider than the diameter of the pegs 9, so that the winder
tube 5 can be placed on the spindle upper part 1 and removed therefrom without any
difficulty.
As can be seen, the stopping surfaces 11 and 13 are each formed by a wall 12 which
borders the longitudinal groove 8, so that the arrangement of the winder tube coupling 4 is
symmetrical. This results in a particulariy simple manufacturing process.
In order that the winder tube 5 can not only be positioned on the spindle upper part 1 without
difficulty, but can also be removed therefrom, the stopping surfaces 11 and 13 take the form
of slanted sliding surfaces 14 for the pegs 9. The slant can, for example, have an angle of
60° in relation to the plane of rotation of the spindle 2. It is further advantageous when, at the
end of the stopping surface 11 or 13, the sliding surface 14 has a definite convex curve 15
having a radius of, for example, 2 mm. The pegs 9 arranged thereto, of which there are, for
the purpose of the invention, three on the winder tube 5, should have a matching round cross
section. In Figure 4 it is indicated how a peg 9 can hereby travel upwards over an
intermediary position 9', shown by a dotted line, when the winder tube 5 is removed.
As can be seen, the longitudinal grooves 8 taper towards the stopping surfaces 11,13. This
gives rise to a very long slant which prevents self-locking, whereby the angle between the
lateral walls can, for example, measure 16.4".
In order to facilitate the positioning of the winder tube 5 and to achieve true concentricity, the
number of longitudinal grooves 8 should be many times the number of pegs 9. For example,
six longitudinal grooves 8 are advantageously arranged to the three pegs 9.
The lateral walls17 and 18 of two adjacent longitudinal grooves 8 extend towards the spindle
tip 10 to form a wedge-like shape. This gives rise at the walls to a knife-like tip 19, whereby
the peg 9 always finds its way into one of the longitudinal grooves 8 when the tube winder 5
is positioned.
As can be seen in particular in Figure 3, the base surfaces 20 of the longitudinal grooves 8
have no curve and take in the present invention the form of a hexagon, at the corners
naturally with the respective walls. At their ends facing away from the spindle tip 10, the
longitudinal grooves 8 can be each provided with an end wall 21, which then, when a conical
supporting surface 3 is present, would not be necessary. Should the supporting surface 3 not
be present, then the end wall 21 presents an alternative for axially fixing the winder tube 5 by
means of their pegs 9.
In oder that no difficulties arise when the winder tube 5 is removed, despite the slanted
sliding surface 14 and the curvature 15, it is important, in particular in the case of automatic
doffing, that the spindle 2; although at a standstill, can, if need be, move slightly in
circumferential direction. This prevents in any case self-locking when the winder tube 5 is
removed.
The winder tube 4 coupling according to the present invention omits all radially movable
parts and presents a taking along with positive fit of the winder tube 5 by means of the
spindle upper part 1. Due to the stopping surfaces 11 or 13, the winder tube 5 is prevented
from travelling upwards, something which is caused by the yarn pulling forces, during
operation. All complicated parts are applied to the spindle upper part 1 and not to the
winder tube 5. The pegs 9 can have such dimensions that the winder tube 5 is centred not
only below at the conical supporting surface 3, but also on the base surfaces 20 of the
longitudinal grooves 8. This is in particular the case when the pegs 9 are not, as
advantageously provided, made in one piece with the winder tube 5 from plastic, but rather
are fixed as radial but stationary pins in the wall of the winder tube 5.
In the variation according to Figures 5,6 and 7 a spindel upper part 1 is provided, in which
the spindle 2, for the purpose of coupling a winder tube 5, possesses a pin-like spindle end
23, on which an exchangeable spindle cap 22 can be placed. This can consist of a light
mouldable plastic or of metal and comprises longitudinal grooves 25, which can be formed
similarly to the longitudinal grooves 8 mentioned above and having also stopping surfaces 27
formed by walls 28, against which the pegs 9 of the winder tube 5 are disposed during
operation. In order to ensure that the torque is taken up, a knurl or the like can be provided
between the pin-like spindle end 23 and the spindle cap 22 .
In the present case, which of course can also apply to the embodiments in Figures 2 to 4, the
longitudinal grooves 25 have a concavely curved base surface 26. This permits the pegs 9 to
be disposed in any case on this base surface 26 when the spindle 2 is rotating and thus to
centre the winder tube 5.
CLAIMS;
1. Winder tube coupling on a spinning or twisting spindle in which the taking along of the
winder tube by the spindle upper part is effected by a connection having a positive fit which
comprises recesses and projections, characterized in that the recesses (6) take the form of
longitudinal grooves (8;25) arranged on the spindle upper part (1) and the projections (7)
take the form of pegs (9) arranged on the winder tube (5) which engage with the longitudinal
grooves (8;25), said pegs (9) being disposed in the direction of the spindle tip (10) during
operation of the spindle (2) on a stopping surface (11,13,27) which narrows the longitudinal
groove (8;25).
2. Winder tube coupling according to claim 1, wherein the stopping surface (11,13;27) is
formed by a wall (12;28) which borders the longitudinal groove (8;25) ~
3. Winder tube coupling according to claim 2, wherein the longitidinal groove (8;25)
graduates to a stopping surface (11,13;27) in both spindle rotational directions.
4. Winder tube coupling according to claim 2 or 3, wherein the wall forming the stopping
surface (11,13;27) takes the form of a slanted sliding surface (14) for the peg (9) in order to
permit the removal of the winder tube (5) from the spindle upper part (1).
5. Winder tube coupling according to claim 4, wherien the sliding surface (14) has a definite
curvature (15).
6. Winder tube coupling acording to any one of the claims 1 to 5, wherein the peg (9) has a
rounded cross section.
7. Winder tube coupling according to any one of the claims 1 to 6, wherein each longitudinal
groove (8;25) tapers towards the stopping surface (11,13;27).
8. Winder tube coupling according to any one of claims 1 to 7, wherein the number of
longitudinal grooves (8;25) is many times that of the number of pegs (9).
9. Winder tube coupling according to claim 8, wherein the lateral walls (17,18) of two
adjacent longitudinal grooves (8;25) extend towards the spindle tip (10) in the shape of a
wedge.
10. Winder tube coupling according to any one of the claims 1 to 9, wherein the base
surfaces (20) of the longitudinal grooves (8;25) are not curved.
11. Winder tube coupling according to any one of the claims 1 to 10, wherein the longitudinal
grooves (8;25) are provided with an end wall (21) at the ends facing away from the spindle
tip (10).
12. A winder tube for application in connection with a winder tube coupling according to any
one of the claims 1 to 11.
13. A spinning or twisting spindle for application in connection with a winder tube coupling
according to any one of the claims 1 to 11.
14. A spinning or twisting spindle according to claim 13, wherein a spindle cap (22)
comprising the longitudinal grooves (25) is placed on the spindle upper part (1).
15. A spinning or twisting spindle according to claim 14, wherein the base surfaces (26) of
the longitudinal grooves (25) are concavely curved.

A winder tube coupling for a spinning or twisting spindle is described, in which the taking
along of the winder tube by the spindle upper part is effected by means of a positive coupling
connection comprising recesses and projections. The recesses take the form of longitudinal
grooves arranged on the spindle upper part, while the projections take the form of cylindrical
pegs arranged on the winder tubes, which pegs engage with the longitudinal grooves. The
pegs are disposed during spindle operation towards the spindle tip on a stopping surface
which causes the longitudinal grooves to narrow. A cap comprising the longitudinal grooves
is preferably positioned on the spindle upper part.

Documents:

423-KOL-2003-(26-07-2012)-CORRESPONDENCE.pdf

423-KOL-2003-ABSTRACT 1.1.pdf

423-kol-2003-abstract.pdf

423-KOL-2003-AMANDED CLAIMS.pdf

423-KOL-2003-ASSIGNMENT.1.3.pdf

423-kol-2003-assignment.pdf

423-KOL-2003-CANCELLED PAGES 1.1.pdf

423-kol-2003-claims.pdf

423-KOL-2003-CORRESPONDENCE 1.3.pdf

423-KOL-2003-CORRESPONDENCE-1.1.pdf

423-KOL-2003-CORRESPONDENCE-1.2.pdf

423-KOL-2003-CORRESPONDENCE.1.3.pdf

423-kol-2003-correspondence.pdf

423-KOL-2003-DESCRIPTION (COMPLETE) 1.1.pdf

423-kol-2003-description (complete).pdf

423-KOL-2003-DRAWINGS 1.1.pdf

423-kol-2003-drawings.pdf

423-KOL-2003-EXAMINATION REPORT.1.3.pdf

423-KOL-2003-FORM 1 1.1.pdf

423-kol-2003-form 1.pdf

423-KOL-2003-FORM 18.1.3.pdf

423-kol-2003-form 18.pdf

423-KOL-2003-FORM 2 1.1.pdf

423-kol-2003-form 2.pdf

423-KOL-2003-FORM 3 1.1.pdf

423-KOL-2003-FORM 3.1.3.pdf

423-kol-2003-form 3.pdf

423-kol-2003-form 5.pdf

423-KOL-2003-FORM-27.pdf

423-KOL-2003-GPA.1.3.pdf

423-KOL-2003-GRANTED-ABSTRACT.pdf

423-KOL-2003-GRANTED-CLAIMS.pdf

423-KOL-2003-GRANTED-DESCRIPTION (COMPLETE).pdf

423-KOL-2003-GRANTED-DRAWINGS.pdf

423-KOL-2003-GRANTED-FORM 1.pdf

423-KOL-2003-GRANTED-FORM 2.pdf

423-KOL-2003-GRANTED-LETTER PATENT.pdf

423-KOL-2003-GRANTED-SPECIFICATION.pdf

423-KOL-2003-PA 1.1.pdf

423-KOL-2003-PA.pdf

423-KOL-2003-PETITION UNDER RULE 137.pdf

423-KOL-2003-REPLY TO EXAMINATION REPORT.1.3.pdf

423-KOL-2003-REPLY TO EXAMINATION REPORT.pdf

423-kol-2003-specification.pdf


Patent Number 248129
Indian Patent Application Number 423/KOL/2003
PG Journal Number 25/2011
Publication Date 24-Jun-2011
Grant Date 20-Jun-2011
Date of Filing 05-Aug-2003
Name of Patentee NOVIBRA GMBH
Applicant Address DONZDORFER STR. 4, 73079 SUSSEN
Inventors:
# Inventor's Name Inventor's Address
1 STAHLECKER GERD AUF DER EBENE 30, D-73054 EISLINGEN/FILS
2 SCHÄFFLER GERNOT NARZISSENWEG 4, D-73116 WASCHENBEUREN
PCT International Classification Number D01H7/16;B65H49/06,
PCT International Application Number N/A
PCT International Filing date
PCT Conventions:
# PCT Application Number Date of Convention Priority Country
1 NA