JP2004137657A - Winder tube coupling for spinning or twisting spindle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To make it possible that parts acting by force of springs or centrifugal force and movable in the radial direction are omitted. <P>SOLUTION: The winder tube coupling for a spinning or twisting spindle is so structured that gripping of a winder tube with an upper part of the spindle is realized by a joining part of a positive motion coupling composed of (two or more) recessed parts and (two or more) protrusions. The recessed parts are arranged on the upper part of the spindle and formed into vertical channels, and the protrusions are arranged on the winder tube and formed into cylindrical pegs, so that the pegs are engaged with the vertical channels. While the spindle is operating, the pegs are arranged in the direction of the top of the spindle on stopping surfaces where the vertical channels are made to be narrowed. A cap having the vertical channels is preferably mounted on the upper part of the spindle. <P>COPYRIGHT: (C)2004,JPO

Description

DETAILED DESCRIPTION OF THE INVENTION

BACKGROUND OF THE INVENTION AND SUMMARY OF THE INVENTION The present invention relates to a winder tube coupling on a spinning or twisting spindle, in which the gripping of the winder tube by the upper part of the spindle is realized by a connection having a positive fit including a recess and a projection.

It is known that a winder tube is centered and simultaneously gripped by a spring element. It is also known that centering and gripping of a winder tube is achieved by a coupling member under the action of centrifugal force. In both variants, a frictional connection or a positive coupling connection of the winder tube coupling can be generated, and if necessary, the friction connection and the positive coupling can be generated simultaneously. However, it is disadvantageous that such winder tube couplings require, apart from the fact that they are very complex in design, additional elements which can be lost during operation of the spindle.

A winder tube coupling for a connection with a positive fit of the type described above is known, for example, from DE 41 31 498 A1. In the case of these winder tube couplings, cap-shaped buttons are provided on the outer circumference of the upper part of the spindle, and these cap-shaped buttons can be arranged on the vertical groove of the winder tube by centrifugal force.

It is an object of the present invention to make a winder tube coupling of the type described above having a connection with a positive fit between the winder tube and the spindle, where a radial or centrifugal force acting under the force of a spring is applied. Moving parts can be omitted.

The object is that according to the invention, the recess takes the form of a flute arranged on the upper part of the spindle, and the projection takes the form of a peg arranged on the winder tube, the peg engaging with the flute. This is achieved by placing the pegs on the stop surface, which narrows the flutes during spindle operation, towards the spindle tip.

According to the present invention, the winder tube coupling is made so that a grip having a positive fit is ensured as in the prior art. In contrast to the prior art, there is no component above the spindle that can move radially by spring or centrifugal force. Thus, good gripping of the winder tube in the circumferential direction of the spindle is achieved when the upper part of the spindle is rotated. In addition, the stop surface that narrows the flutes ensures that the winder tube does not move upward toward the spindle tip due to the tension of the wound thread that appears during operation. Obviously, the slit width must be larger than the diameter of the peg. The advantage is that all the complicated shapes present on the winder tube coupling are provided on the upper part of the spindle, while the winder tube only needs to include a simple peg or a plurality of pegs.

The stop surface described above can be formed by walls that bound the flutes. This not only results in a particularly simple manufacture, but also ensures a continuous transverse boundary of the flutes. In order to be independent of the direction of rotation of the spindle, it is advantageous when the flutes include stop surfaces in both directions of spindle rotation. This also results in a symmetrical manufacture of the winder tube coupling.

The winder tube coupling must be suitable for automatic doffing, and especially for automatic placement of the winder tube on top of the spindle, so that not only when the winder tube is placed but also when it is removed. Care must be taken that they do not lock. Further, it is advantageous that the stop spindle can rotate only slightly circumferentially when the winder tube is being removed from the top of the spindle. This is in any case the case of a modern spindle drive and is considered to be the case of the present invention.

In one embodiment of the invention, the wall forming the stop surface takes the form of an inclined slide surface for the peg when the winder tube is removed from the top of the spindle. Taking advantage of the circumferential spindle mobility clearly prevents any self-locking, so that automatic removal of the winder tube from the top of the spindle is not impeded. On the other hand, the slide surface, of course, should not be so inclined in accordance with the invention that it acts as a resistance to the yarn pulling force during operation. Since the doffing force for removing the winder tube is in each case greater than the thread pulling force, the exact inclination of the slide surface can be determined by simple tests. An angle of approximately 60 ° with respect to the plane of rotation of the spindle has proven to be advantageous.

更 に It is more convenient when the slide surface has a constant curvature. For example, a convex radius of approximately 2 mm can be included. As the winder tube is removed from the top of the spindle, the pegs of the winder tube can move along this curve towards the spindle tip.

と き It is expedient when the peg has a curved or oval cross-section in order to make the peg slide as easily as possible when the winder tube is removed from the top of the spindle. Overall, the pegs can take the form of cylindrical pins or hemispheres.

In a further embodiment of the invention, the flutes taper in the direction of the stop surface. This results in a very long entrance slope for the pegs when the winder tube is placed on the spindle, so that self-locking is avoided in any case. Angles between 15 ° and 18 ° between the transverse walls have proven to be practical for the present invention.

However, it is practical when there are more flutes than pegs, taking into account that there is as little balancing error as possible to facilitate placement of the winder tube on top of the spindle. For the purposes of the present invention, the number of flutes is many times the number of pegs. For example, six flutes and three pegs have proven to be advantageous.

更 に It is even more practical when the transverse walls of two adjacent flutes extend in a wedge shape towards each other in the direction of the spindle tip. Between every two flutes starting at the spindle tip, an edge occurs, so that the pegs do not collide with the wall when the winder tube is placed, but rather are located in the flute.

The base surface of the flutes is advantageously straight and polygonal, for example hexagonal; This results in a particularly simple manufacturing process.

に Alternatively, the base surface can be concavely bent. Thus, the pegs of the winder tube can be placed on top of the spindle when the spindle is rotating, even with the appearance of a tolerance-based play for centering the winder tube.

In a particularly advantageous embodiment of the invention, a spindle cap including a flute is provided and is placed on top of the spindle. This not only results in a cost-effective manufacturing process, but also allows the spindle to be easily adapted to different types and diameters of winder tubes.

Although not absolutely necessary, in some circumstances it can be expedient when the flutes have an end wall at the end facing away from the spindle tip. Typically, the winder tube is supported on a stop surface on the top of the spindle, on its lower end facing away from the spindle tip. However, there may be a further modification in that the winder tube is alternatively supported on the end wall via pegs and can therefore be fixedly arranged in the axial direction.

According to the invention, it is provided that, in addition to the described embodiments, a winder tube and a spinning or twisting spindle for application in the described winder tube coupling are 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, taken in conjunction with the accompanying drawings. In the drawing:
Figure 1 is a partial cross-sectional longitudinal view of the upper part of the spindle with the winder tubes arranged, almost in original dimensions,
FIG. 2 is a partial view of the upper part of the spindle of FIG. 1 without the winder tube in the area of the winder tube coupling in enlarged dimensions;
3 is a cross section of the upper part of the spindle along the cross section III-III of FIG. 2 with the winder tube arranged,
FIG. 4 is a partial view of FIG. 2 with greatly enlarged dimensions;
FIG. 5 is a partial view of the top of the spindle including a separate spindle cap, partially shown in cross-section, serving as a winder tube coupling;
FIG. 6 is the spindle cap of FIG. 5 from the outside,
FIG. 7 is a cross section of the upper part of the spindle including the spindle cap along the cross section VII-VII of FIG. 6, with the winder tube arranged.

DETAILED DESCRIPTION OF THE DRAWINGS The spindle upper part 1 of a spinning or twisting spindle 2 is shown in longitudinal view in FIG. The spindle upper part 1 gradually changes in its lower region into a conical support surface 3 to which a worm drive (not shown) and a spindle shaft (not shown) are added in a known manner. A winder tube coupling 4 is provided in the upper region of the spindle upper part 1, which will be described in more detail below.

The winder tube 5 is arranged on the spindle upper part 1, and this tube 5 is shown in a longitudinal section. The winder tube 5 is supported below on the conical support surface 3 or on the stop surface and is therefore centered in its lower region. The winder tube 5 is gripped by the spindle upper part 1 which rotates in the same direction during operation of the spindle 2.

When the winder tube 5 is placed on the spindle upper part 1, the winder tube 5 can often drop 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 on the spindle upper part 1.

The winder tube coupling 4 according to the invention is described below with the help of FIGS. 2, 3 and 4 on an enlarged scale.

The winder tube coupling 4 functions without a radially movable part and is a connection with a positive fit, which is actuated by a recess 6 on the upper spindle 1 and a projection 7 on the winder tube 5. I do. The direction of spindle rotation is indicated by the letter A.

Six recesses 6 are provided as a whole, which take the form of flutes 8. Three projections 7 are provided in contrast in the form of three pegs 9. The peg 9 engages in the flute 8 during operation and is gripped in the rotational direction A by the shaping closure.

In the end region facing away from the spindle tip 10, the initially tapering flutes 8 are widened to undercuts, and thus the stop surfaces 11 and 13 which become narrower in the flutes 8 in both circumferential directions. Is formed. The flute 8 must of course be wider at its narrowest point than the diameter of the peg 9, so that the winder tube 5 can be placed on the spindle upper part 1 and removed therefrom without difficulty. .

As can be seen, the stop surfaces 11 and 13 are respectively formed by the walls 12 bounding the flutes 8, so that the arrangement of the winder tube coupling 4 is symmetric. This results in a particularly simple manufacturing process.

In order that the winder tube 5 can not only be arranged on the spindle upper part 1 without difficulty, but also be removed therefrom, the stop surfaces 11 and 13 are provided on the inclined sliding surface 14 for the pegs 9. Take shape. The inclination can for example have an angle of 60 ° with respect to the plane of rotation of the spindle 2. It is further advantageous when the sliding surface 14 at the end of the stop surface 11 or 13 has a constant convex curve 15 with a radius of, for example, 2 mm. The three pegs 9 located there on the winder tube 5 for the purposes of the present invention should have a matching round cross section. FIG. 4 shows how, as a result, when the winder tube 5 is removed, the beg 9 can move upward beyond the intermediate position 9 'shown in dotted lines.

As can be seen, the flute 8 tapers towards the stop surfaces 11,13. This results in a very long slope preventing self-locking, where the angle between the transverse walls can be for example 16.4 °.

The number of flutes 8 should be many times the number of pegs 9 to facilitate placement of the winder tube 5 and achieve true concentricity. For example, it is advantageous that six flutes 8 are advantageously arranged on three pegs 9.

The lateral walls 17 and 18 of two adjacent longitudinal grooves 8 form a wedge shape extending towards the spindle tip 10; This results in a knife-like tip 19 on the wall, whereby the peg 9 always finds its way into one of the flutes 8 when the tube winder 5 is placed.

As can be seen in particular in FIG. 3, the base surface 20 of the flute 8 is not curved and takes the shape of a hexagon in the present invention, of course with its respective wall at its corners. At their end facing away from the spindle tip 10, the flutes 8 can each be provided with an end wall 21, which would not be necessary when a conical support surface 3 is present. If the support surface 3 is not present, then the end wall 21 provides an alternative for the axial fixation of the winder tube 5 by the pegs 9.

Since no difficulties arise when the winder tube 5 is removed, despite the inclined slide surface 14 and the curved section 15, if the spindle 2 is stopped, if necessary, especially in the case of automatic doffing. It is important to be able to move slightly in the circumferential direction. This prevents self-locking in any case when the winder tube 5 is removed.

The winder tube coupling 4 according to the invention omits all radially movable parts and provides a grip with a positive fit of the winder tube 5 with the upper spindle 1. Due to the stop surface 11 or 13, the winder tube 5 during operation is prevented from any upward movement caused by the thread pulling force. All the complex parts apply to the upper part 1 of the spindle and not to the winder tube 5. The pegs 9 can be dimensioned such that the winder tube 5 is centered not only on the lower conical support surface 3 but also on the base surface 20 of the flute 8. This is particularly true when the pegs 9 are advantageously, but not made of one piece from the plastic, with the winder tube 5 and rather are fixed to the wall of the winder tube 5 as radially stationary pins. It is.

In the variant according to FIGS. 5, 6 and 7, the spindle 2 for the purpose of coupling the winder tube 5 has a pin-shaped spindle end 23 on which a replaceable spindle cap 22 can be placed. Is provided. It can be made of light moldable plastic or metal and includes flutes 25, which can be formed in the same way as the flutes 8 described above, and the stop surfaces formed by the walls 28 27, to which the pegs 9 of the winder tube 5 are arranged in operation. Knurls or the like can be provided between the pin-shaped spindle end 23 and the spindle cap 22 to ensure transmission of torque.

In the case of this variant, the flutes 25 have a concavely curved base surface 26, although of course also applicable to the embodiments of FIGS. This allows the peg 9 to be located on this base surface 26 in any case when the spindle 2 is rotating, thus allowing the winder tube 5 to be centered.

FIG. 4 is a partial cross-sectional longitudinal view of the upper part of the spindle with the winder tubes arranged, almost in original dimensions. FIG. 2 is a partial view of the upper part of the spindle of FIG. 1 without the winder tube in the region of the winder tube coupling in enlarged dimensions; 3 is a cross section of the upper part of the spindle along the cross section III-III of FIG. 2 with the winder tube arranged. FIG. 3 is a partial view of FIG. 2 with greatly enlarged dimensions. FIG. 9 is a partial view of the upper part of the spindle including a separate spindle cap, partially shown in cross section, serving as a winder tube coupling. Fig. 6 is the spindle cap of Fig. 5 from the outside. 7 is a cross section of the upper part of the spindle including the spindle cap along the cross section VII-VII of FIG. 6, with the winder tube arranged.

Claims (15)

A winder tube coupling on a spinning or twisting spindle, wherein the gripping of the winder tube by the upper part of the spindle is realized by a connection having a positive fit including a recess and a projection, wherein the recess (6) is Takes the form of a flute (8; 25) arranged on the spindle upper part (1) and a projection (7) is arranged on the winder tube (5) and engages the flute (8; 25). A stop surface (11,13; 27), said peg (9) narrowing a flute (8; 25) in the direction of the spindle tip (10) when the spindle (2) is actuated. A winder tube coupling, which is disposed above. Winder tube coupling according to claim 1, characterized in that the stop surface (11, 13; 27) is formed by a wall (12; 28) bounding the flute (8; 25). Winder tube coupling according to claim 2, characterized in that the flutes (8; 25) gradually change in the direction of rotation of both spindles towards the stop surface (11, 13; 27). The shape of the inclined sliding surface (14) for the peg (9) is such that the walls forming the stop surfaces (11, 13; 27) allow removal of the winder tube (5) from the spindle upper part (1). The winder tube coupling according to claim 2 or 3, wherein Winder tube coupling according to claim 4, characterized in that the slide surface (14) has a constant curvature (15). A winder tube coupling according to any one of the preceding claims, wherein the peg (9) has a round cross section. ワ イ ン Winder tube coupling according to any one of the preceding claims, characterized in that each flute (8; 25) tapers towards a stop surface (11, 13; 27). Winder tube coupling according to any one of claims 1 to 7, wherein the number of flutes (8; 25) is many times the number of pegs (9). Winder tube coupling according to claim 8, characterized in that the lateral walls (17, 18) of two adjacent longitudinal grooves (8; 25) extend in the form of wedges towards the spindle tip (10). The winder tube coupling according to any one of claims 1 to 9, wherein the base surface (20) of the vertical groove (8; 25) is not bent. Winder according to one of the preceding claims, characterized in that the flute (8; 25) has an end wall (21) at the end facing away from the spindle tip (10). Tube coupling. A winder tube for application in connection with the winder tube coupling according to any one of claims 1 to 11. A spinning or twisting spindle for application in connection with a winder tube coupling according to any one of the preceding claims. Spinning or twisting spindle according to claim 13, characterized in that a spindle cap (22) comprising a flute (25) is placed on the spindle upper part (1). 15. Spinning or twisting spindle according to claim 14, characterized in that the base surface (26) of the flute (25) is concavely bent.

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