JP7483749B2 - Winding pipe - Google Patents

Description

The present invention relates to a winding tube for accommodating a yarn package, as described in the preamble of claim 1.

During the production and processing of yarns, it is generally known that yarns are wound into yarn packages for intermediate storage. For the storage and transport of such yarn packages, they are wound around so-called winding tubes. For this purpose, the winding tubes are designed as hollow cylinders so that they can be slipped onto a packaging mandrel or onto a chuck. In particular, during the production of synthetic yarns in a melt spinning process, several winding tubes are usually held around the packaging mandrel as a winding tube stack. In this case, the winding tubes can be fixed in position on the packaging mandrel by means of a clamping means. Winding tubes of this kind are known, for example, from DE 41 15 339 A1.

The known winding tube has a hollow cylindrical winding tube body, which at one end face has a catch element for catching the yarn. The winding tube is of a hollow cylindrical design throughout and is clamped to the periphery of the packaging mandrel. To this extent, several clamping means are required to fix the winding tubes on the periphery of the packaging mandrel.

However, the prior art also knows tubes which are connected to one another in a positively-locking manner at their end faces in the tube stack by axial clamping. Thus, for example, WO 2010/094553 reveals that several tubes are fixed on the circumference of the packaging mandrel by axial clamping with a clamping means arranged on the free end of the packaging mandrel. The axial force required to fix several tubes depends on the number of tubes. With a large number of tubes on the circumference of the packaging mandrel, a secure hold of all the tubes is therefore associated with very high axial forces, which require a correspondingly high deformability of the tubes.

The object of the present invention is therefore to improve the winding tube of the type mentioned at the beginning so that the winding tube, in groups of several winding tubes arranged next to each other, can be reliably fixed on the circumferential surface of the packaging mandrel without relying on axial forces.

This problem is solved by the present invention in that a position fixing element is arranged on at least one end face of the tube body, and the position fixing element is formed elastically deformable to radially clamp the tube body around the circumferential surface of the packaging mandrel.

Advantageous refinements of the invention are defined by the features and combinations of features recited in the respective dependent claims.

The invention has the particular advantage that in an axially joined tube stack, the tube body is held against the circumferential surface of the packaging mandrel by radial clamping. The tube body is thus fixed in position against the circumferential surface of the packaging mandrel by automatically induced clamping.

In this case, a refinement of the invention has proven particularly useful, in which the fixing elements provided on the tube bodies are deformable by the axial movement of the tube bodies onto the packaging mandrel. The tube bodies can therefore initially be slipped onto the packaging mandrel without significant resistance. Only by the cooperation of the adjacent tube bodies does the deformation of the fixing elements take place, and an automatic radial tightening of the tube bodies takes place.

In a particularly advantageous refinement of the invention, the fixing element is formed by a rubber ring, which is mounted in a receiving recess at the end face of the tube body. As a result, even a very small axial movement can cause a high radial clamping force acting between the tube body and the packaging mandrel due to the material behavior (deformation) of the rubber ring.

In order to maintain radial tension at each end face of the tube body, a preferred embodiment of the invention is implemented in which the tube body has a rubber ring at each end face, which extends beyond the end face of the tube in the unloaded state. Thus, the butting of the tube bodies already in the tube stack can be advantageously used to generate radial tension.

According to another advantageous refinement of the invention, the fixing means is formed by elastic clamping tongues arranged on the end face of the tube body, which are evenly distributed around the circumference of the tube body and are arranged in accordance with the inner contour. Such clamping tongues are preferably formed directly on the end face of the tube body. Depending on the material thickness of the clamping tongues and the structural connections, the elasticity of the clamping tongues for deformation can be decisively influenced.

In order to bring about a uniform radial clamping of the tube body over the circumference of the packaging mandrel, it is further provided that the clamping tongues extending in the axial direction of the tube body are formed in an inclined manner and can be deformed by corresponding clamping cones. As a result, radial clamping of the tube body is possible essentially without axial preloading of the tube stack.

The clamping cones are advantageously formed on the opposite end faces of the tube bodies so that adjacent tube bodies in the tube stack can be combined by means of the clamping cones and the clamping tongues.

Another alternative embodiment of the invention is provided by a modification in which the position fixing element is constituted by a number of clamping tongues formed at a predetermined distance from one another at the end face of the tube body, which can be clamped by a number of opposing clamping projections provided at the end face of the adjacent tube body. This results in a number of clamping areas distributed along the circumference, which provide a secure hold even in the presence of tolerances of the clamping tongues and clamping projections.

A particularly advantageous refinement is in which a number of clamping tongues and a number of clamping lugs are arranged offset from one another on each of the two end face ends of the tube body. The end face ends of the tube body can thus be combined with one another in any way to obtain a radial clamping that occurs automatically during axial movement.

The removal of the tube bodies of the tube stack can be particularly improved by a refinement of the invention in which the tube bodies have a radially oriented annular withdrawal groove on the periphery, which is arranged on one of the end face ends. This allows, for example, an automatic operating unit or a doffer to be used to remove the tubes loaded with the yarn package from the packaging mandrel.

Particularly advantageous is a refinement of the invention in which the winding tube has a number of axial grooves arranged in a distributed manner on the inner diameter side, which preferably cooperate with longitudinal webs on the periphery of the packaging mandrel, so that the winding tube assumes a predefined position as much as possible when it is fitted onto the packaging mandrel and rotation of the winding tube is avoided. As a result, a form-locking connection between the winding tube and the packaging mandrel is already realized during fitting.

The tube according to the invention is therefore particularly suitable for being automatically clamped around the periphery of a packaging mandrel. A larger number of tube bodies can be reliably held around the periphery of the packaging mandrel as a tube stack.

The present invention will now be described in detail with reference to the accompanying drawings, which illustrate some embodiments of the winding tube according to the present invention.

1 shows a schematic view of a first embodiment of a winding tube according to the invention in one view; FIG. FIG. 2 shows a schematic view of a first embodiment of a winding tube according to the present invention from another perspective. 3 shows a schematic view of another embodiment of a winding tube according to the invention in one view; FIG. 4 is a schematic view of another embodiment of a winding tube according to the present invention, seen from another angle; FIG. 3 shows a schematic view of yet another embodiment of a winding tube according to the invention in one view; FIG. FIG. 4 is a schematic view of yet another embodiment of a winding tube according to the present invention, seen from another angle.

In Fig. 1.1 and Fig. 1.2, a first embodiment of a winding tube according to the invention is shown in several views. Fig. 1.1 shows a schematic combination of a cross section and a side view, and Fig. 1.2 shows a schematic partial view of the end face end of the embodiment shown in Fig. 1.1 in a tightened state.

The winding tube of the embodiment shown in FIG. 1.1 has a hollow cylindrical winding tube body 1. The winding tube body 1 has two end faces 2.1, 2.2 located opposite each other. Each of the end faces 2.1, 2.2 is formed with a receiving recess 5.1, 5.2, respectively. The receiving recess 5.1 in the end face 2.1 is bounded by an annular web 6.1 on the inside. Correspondingly, the receiving recess 5.2 in the end face 2.2 is bounded by an annular web 6.2 as well. In this embodiment, the receiving recesses 5.1, 5.2 are formed with the same inner diameter, and the cutting depths determined by the webs 6.1, 6.2 are likewise configured to be the same.

An elastically deformable fixing element 3 is arranged in each of the receiving recesses 5.1, 5.2. The fixing element 3 is formed by two separate rubber rings 4.1, 4.2. The rubber rings 4.1, 4.2 are arranged in the receiving recesses 5.1, 5.2 and are fixedly connected to the tube body 1 by gluing or vulcanization. The rubber rings 4.1, 4.2 arranged in the receiving recesses 5.1, 5.2 are dimensioned in their axial extension such that they each have a free end that overhangs the end face ends 2.1, 2.2 of the tube body 1.

The tube body 1 has an annular drawing groove 19 on its outer contour. This drawing groove 19 is arranged at the end face end 2.2.

In order to explain the fixing elements 3 provided on the end faces 2.1, 2.2, reference is additionally made to FIG. 1.2. In FIG. 1.2, the end face 2.1 of the tube body 1 is shown in a clamped state. This tube body 1 and another tube body 1' are connected at their end faces 2.1, 2.2' by axial clamping on the circumference of the packaging mandrel 8. The end faces 2.1, 2.2' are connected against each other, so that deformations of the rubber rings 4.1', 4.2' occur. The rubber rings 4.1', 4.2' are thus compressed. Due to the low compressibility of the rubber ring 4.1, a clamping force acting in the radial direction occurs between the tube body 1 and the packaging mandrel 8 at the same time as a very high rigidity of the radial fixation. The adjacent tube body 1' is likewise held separately radially clamped by the clamping force generated by the rubber ring 4.2'.

The embodiment of the winding tube according to the invention shown in FIG. 1.1 is fixed radially on the circumference of the packaging mandrel 8 by axial clamping, whether in multiple or single cases. Thus, for example, one of the end face ends 2.1 or 2.2 can be arranged to rest against an axial stop, so that the deformation of the fixing element 3 during axial movement results in radial clamping. At the end face end 2.1 or 2.2 corresponding to the free end of the packaging mandrel 8, the axial clamping can be brought about, for example, by a clamping ring arranged on the circumference of the packaging mandrel 8. However, a special advantage of the winding tube according to the invention is that multiple tube bodies can be held on the circumference of the packaging mandrel 8 as a tube stack (or tube assembly) by their own clamping, which occurs individually in each case.

The possibility of pulling the tube body 1 out of the packaging mandrel 8 is provided by a radial pulling groove 19 formed in an annular manner on the circumferential surface of the tube body 1. This process can be performed on the tube body 1 manually or automatically.

2.1 shows a cross-sectional view and a side view of another embodiment of the tube according to the invention, and in FIG. 2.2 shows a schematic partial view of one of the end ends. In the embodiment shown in FIG. 2.1, the elastic fixing element 3 is formed directly on the end end 2.2 of the tube body 1. The fixing element 3 is formed by a number of individual clamping tongues 9, which are arranged axially protruding at the end end 2.1 of the tube body 1. The clamping tongues 9 are formed with a sloped outer contour and are arranged in the extension of the inner contour of the tube body 1. The clamping tongues 9 are evenly distributed around the circumference of the hollow cylindrical tube body 1, and between the clamping tongues 9 there is a separating groove 13 in each case. To enable bending of the clamping tongues 9 relative to the tube body 1, annular deformation joints 11 are formed. The tension tongues 9 are bent inwards in the radial direction.

At the end face end 2.1 located opposite the tube body 1, a clamping cone 10 is formed on the inner contour. The clamping cone is delimited inwardly by a tube stop 12. The clamping cone 10 is formed with a slope. This slope corresponds to the outer contour of the clamping tongue 9. The clamping cone 10 of the end face end 2.1 is therefore slipped over the clamping tongue 9 of the adjacent tube body 1 to achieve radial clamping.

Figure 2.2 shows how the opposing end face ends 2.2, 2.1' of the tube bodies 1, 1' cooperate with each other. The clamping cone 10' of the tube body 1' is fitted over the clamping tongue 9 of the adjacent tube body 1. Due to the predefined fit, a defined radial crimping of the tube body 1 and the tube body 1' is achieved around the packaging mandrel 9 when the clamping tongue 9 reaches the tube stop 12'.

To fix the end of the tube body 1 that corresponds to the free end of the packaging mandrel, a clamping ring with a corresponding clamping cone can be used, so that the last tube of the tube stack can be radially clamped at each end face end on the packaging mandrel 8.

The end face end 2.1 of the tube body 1, formed with the clamping cone 10, is preferably used to abut against a tube stop. This tube stop also preferably has a beveled outer contour for receiving the clamping cone 10.

As can be seen from the drawing in FIG. 2.1, the circumferential surface of the tube body is provided with a radial withdrawal groove 19 extending in the circumferential direction. This withdrawal groove 19 corresponds to the end face end 2.2 and serves for the withdrawal of the tube 1 from the packaging mandrel 8.

In order to obtain end faces of the tube body 1 that are as uniform as possible, Figs. 3.1 and 3.2 show a schematic representation of a further embodiment of the tube according to the invention in several views. Fig. 3.1 shows a combination of a cross section and a side view of the tube, and Fig. 3.2 shows the end faces 2.1, 2.2' in the clamped state around the packaging mandrel 8.

In the exemplary embodiment of the tube shown in FIG. 3.1, an elastically deformable fixing element 3 is arranged on each of the end faces 2.1, 2.2 of the tube body 1. The fixing elements 3 are formed by elastically bendable clamping tongues 14 at both end faces 2.1, 2.2. The clamping tongues 14 are distributed around the circumference of the tube body 1 at equal intervals and are formed directly on the end faces 2.1, 2.2 of the tube body 1. At the end faces 2.1, 2.2 of the tube body 1, a clamping lug 15 is formed in each space between adjacent clamping lugs 14. The clamping lugs 14 each have a clamping cone 16 on the circumference, which corresponds to a clamping cone 17 formed on the inner contour of the clamping lug 15. In this respect, the axial movement of the tube bodies 1 causes each of the clamping projections 15 to engage with the clamping tongues 14, which then bring about a radial pressure against the circumferential surface of the packaging mandrel 8. Due to the material thickness of the clamping projections 15 and clamping tongues 14 and their geometric shape as well as the design of the gradient of the clamping cones 16 and 17, a defined radial clamping force can be generated at the end faces 2.1, 2.2 of the tube body 1. In order to combine the tube bodies 1 with one another, the clamping tongues 14 and clamping projections 15 at the end face 2.1 are designed with their angular position offset in the circumferential direction with respect to the clamping tongues 14 and clamping projections 15 at the opposite end face 2.2 of the tube body 1.

Figure 3.2 shows the state in which the end face 2.1 of the tube body 1 is clamped radially to the end face 2.2' of the tube body 1' around the packaging mandrel 8. The clamping lug 15' of the tube body 1' is preferably butted against the stop so that the clamping lug 14 on its underside is pressed against the packaging mandrel 8, causing the tube body 1 to be fixed in its radial position.

As is clear from the drawing in FIG. 3.1, a number of axial grooves 18 are formed in the inner contour of the tube body 1. The axial grooves 18 pass completely through the tube body 1 from the end face end 2.1 to the end face end 2.2. Such axial grooves 18 can preferably engage with longitudinal webs provided on the circumferential surface of the packaging mandrel 8 in order to obtain centering of the tube body 1 on the circumferential surface of the packaging mandrel 8. This simultaneously achieves anti-rotation of the tube.

In the embodiment of the winding tube according to the invention shown in FIG. 3.1, a stopper ring having a shape corresponding to the shape of the clamping projection 15 and the fastening tongue 14 is required for mounting on the packaging mandrel 8.

Since it is not necessary to clamp the tubes axially relative to one another to maintain the radial tension, the end faces of the tube body 1 facing the free end of the packaging mandrel 8 can be fixed in position, for example, by radially acting clamping blocks. After the tube bodies 1 of the tubes are moved axially towards one another, the radial tension is maintained by the self-locking between the clamping tongues 14 and the clamping projections 15. In order to move the tube stack with the wound packages around the packaging mandrel 8 and to disassemble it, the tube body 1 is provided with a pull-out groove 19 on its periphery. This allows the tube body 1 to be pulled out of the packaging mandrel 8 towards the respective end face end 2.1 or 2.2.

The illustrated embodiment of the winding tube according to the invention has the special advantage that the tube body has a high reusability. Such a winding tube can therefore be used several times to receive packages in a fixed position on a packaging mandrel. The winding tube body 1 is preferably manufactured from plastic or light alloy. The structural design of the fixing element shown is exemplary. What is important is that at the end face end of the winding tube body 1, a radial tightening occurs due to the deformation of the fixing element. The deformation of the fixing element is initiated exclusively by the axial movement of the winding tube body 1, which can be performed by auxiliary devices or tightening means or by the adjacent winding tube.

Claims (7)

A winding tube for receiving a yarn package, comprising a hollow cylindrical winding tube body (1), said winding tube body (1) being configured so as to be able to be slipped over a package mandrel (8),
A fixing element (3) is arranged on at least one end face end (2.1) of the tube body (1), the fixing element (3) being elastically deformable for radially clamping the tube body (1) around a circumferential surface of a packaging mandrel (8) ,
the position fixing element (3) provided on the tube body (1) is deformable by axial movement of the tube bodies (1) on a packaging mandrel (8);
1. A winding tube, comprising: a tube body, the tube being provided with a plurality of end face portions, the end face portions being formed by a plurality of elastic fastening tongues, the end face portions being provided at the end face portions and the tube body being provided with a plurality of end face portions and the tube body being provided with a plurality of end face portions and the end face portions being provided at the ... 2. The tube according to claim 1 , wherein the clamping tongue (9) projecting in the axial direction of the tube body (1) is beveled for a clamping cone (10) to be fitted over the clamping tongue (9). 3. The tube according to claim 2, wherein the tube body (1) has a clamping cone (10) at its opposite end face end (2.1, 2.2 ), which can be slipped over a clamping tongue (9) of an adjacent tube body (1'). 2. The tube according to claim 1, wherein the fixing element (3) is constituted by a number of fastening tongues (14) arranged at a predetermined distance from one another on the end face ends (2.1, 2.2) of the tube body (1), the fastening tongues (14) having a number of clamping projections (15) therebetween, the clamping projections (15) of an adjacent tube body (1) being able to be slipped over the fastening tongues ( 14 ). 5. The tube according to claim 4 , wherein the tube body (1) has at each of its two end faces (2.1, 2.2) a number of clamping tongues (14) and a number of clamping lugs (15) arranged offset relative to one another. 2. The winding tube according to claim 1, wherein the peripheral surface of the winding tube body (1) has a radial drawing groove (19) extending in the circumferential direction, the drawing groove (19) being arranged in one of the end surface ends ( 2.1 , 2.2). 2. The winding tube according to claim 1, wherein the winding tube body (1) has a plurality of axial grooves (18) formed in a distributed manner on the inner diameter side, the axial grooves (18) passing completely through the winding tube body ( 1 ).

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