CN117585535A

CN117585535A - Bobbin case

Info

Publication number: CN117585535A
Application number: CN202410028014.8A
Authority: CN
Inventors: H·瓦尔特曼; J·科瓦尔斯基; R·沃斯
Original assignee: Oerlikon Textile GmbH and Co KG
Current assignee: Oerlikon Textile GmbH and Co KG
Priority date: 2019-04-17
Filing date: 2020-04-06
Publication date: 2024-02-23
Also published as: JP2022529777A; JP7483749B2; CN113677610B; WO2020212180A1; CN113677610A

Abstract

The invention relates to a bobbin housing for accommodating a yarn bobbin, comprising a hollow-cylindrical tubular body (1) which is designed to be pushed onto a bobbin spindle. In order to obtain a radial fastening of the tubular body (1) on the circumferential surface of the bobbin mandrel (8), according to the invention, a fastening element (3) is provided on at least one end face (2.1) of the tubular body, which fastening element is designed to be elastically deformable in order to radially tighten the tubular body (1) on the circumferential surface of the bobbin mandrel (8).

Description

Bobbin case

The present application is a divisional application of the invention patent application (application date: month 4 and 6 of 2020, title of the invention: bobbin case) with the original application number 202080029006.5 (International application number PCT/EP 2020/059765).

Technical Field

The present invention relates to a winding tube for accommodating a yarn bobbin.

Background

In the production and processing of yarns, it is known to wind the yarn into bobbins for temporary storage. In order to accommodate and transport such a yarn package, the yarn package is wound on the circumferential surface of a so-called winding tube. For this purpose, the winding tube is designed as a hollow cylinder for pushing onto the bobbin mandrel or collet. In particular in the melt spinning production of synthetic yarns, it is common to tension a plurality of winding bobbins in a bobbin stack on a bobbin mandrel. The winding tube can be fastened to the circumference of the bobbin mandrel by a clamping mechanism. Such a winding tube is known, for example, from DE4115339 A1.

The known winding tube has a hollow cylindrical tubular body with a gripper at the free end face for gripping the yarn. The tube body is designed as a continuous hollow cylinder and is clamped on the circumference of the bobbin mandrel. In this regard, a plurality of clamping mechanisms are required to secure a plurality of winding bobbins to the bobbin mandrel circumference.

However, winding bobbins of the type in which the winding bobbins are connected to one another with their end faces in a positive-locking manner in a bobbin stack by axial tensioning are also known from the prior art. Thus, for example, from WO2010/094553A1, a plurality of winding bobbins are fixed to the bobbin mandrel circumference by axial tensioning by means of a clamping mechanism which is arranged at the free end of the bobbin mandrel. The axial force required to fix a plurality of winding bobbins is here related to the number of winding bobbins. In the case of a large number of winding bobbins on the circumference of the bobbin mandrel, therefore, a stable holding of all the winding bobbins is only associated with a large axial force, which requires correspondingly high dimensional stability of the winding bobbins.

Disclosure of Invention

The object of the present invention is therefore to improve a winding tube of this generic type such that the winding tube in a combination of a plurality of winding tubes arranged next to one another can be firmly fixed on the bobbin mandrel surface independently of any axial clamping forces.

According to the invention, this object is achieved in that a fastening element, which is designed to be elastically deformable for radial tensioning of the tubular body on the circumference of the bobbin mandrel, is arranged on at least one end face of the tubular body.

The invention has the special advantage that the winding bobbins in the axially joined bobbin stack are held on the bobbin mandrel circumference by radial tensioning. The winding tube can then be fastened to the circumference of the bobbin mandrel by means of the automatically initiated tensioning.

The following improvements of the invention have been made in particular in this case, the fastening element being deformable on the tube body by axial displacement of a plurality of tube bodies on the bobbin mandrel. The tube can then be initially pushed onto the bobbin mandrel without any significant resistance. Deformation of the fixing occurs solely due to the interaction of adjacent tubes, which results in automatic radial tightening on the tubes.

In a particularly advantageous development of the invention, the fastening element is formed by a rubber ring which is fastened in a groove on the end face of the tube body. Because of the rubber ring material properties, even minimal axial movements may thereby result in large clamping forces acting radially between the pipe body and the clamping mandrel.

In order to achieve radial tensioning on the end faces of the tube body, which has rubber rings on both end faces, the rubber rings protrude from the end face of the winding tube in the relaxed state, a development of the invention is preferably achieved. The tubes in the stack of tubes are pushed together and can therefore already be used advantageously for generating radial clamping forces.

According to a further advantageous development of the invention, the fastening means are formed by a plurality of elastic clamping tongues on the end face of the tubular body, which are arranged uniformly distributed around the tubular body and are assigned to the inner contour. Such a clamping tongue can preferably be formed directly on the end face of the tube body. Here, the elasticity for deforming the clamping tongue can be influenced mainly by the material thickness and the structural attachment of the clamping tongue.

In order to produce a uniform radial tensioning of the tube body over the entire circumference of the bobbin mandrel, it is also provided that the axially projecting clamping tongues of the tube body are designed in a ramp-like manner and can be deformed by a corresponding clamping cone. The radial tensioning of the tubular body can then be effected substantially without axial pretensioning of the bobbin stack.

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

A further alternative embodiment of the invention is provided by the fact that the securing element is formed by a plurality of clamping tongues which are designed to be spaced apart from one another on the end face of the pipe body, said clamping tongues being capable of being clamped by a plurality of opposing clamping projections on the end face of an adjacent pipe body. This results in a plurality of clamping areas which are designed to be distributed over the circumference and have the effect of being firmly held even in the case of differences in tolerance between the clamping tongue and the clamping projection.

In this case, the following modifications are particularly advantageous, in which the plurality of clamping tongues and the plurality of clamping projections are each designed to be offset from one another on both end faces of the tubular body. The end faces of the tube body can then be combined with one another at will in order to obtain a self-generated radial tension in the event of an axial displacement.

The removal of the tubular body in the tube stack can be improved in particular by the following inventive development, the tubular body having radially surrounding drop tube grooves on the circumferential surface, which drop tube grooves are assigned to one of the end faces. Thus, an operating robot or doffer can be used to drop the tube pushed by the yarn bobbin, for example, from the bobbin mandrel.

In order to be able to ideally assume a predetermined position when the winding tube is pushed onto the bobbin mandrel and to prevent any rotation of the winding tube, the development of the invention is particularly advantageous in that the tube body has a plurality of axial grooves which are designed to be distributed over the inner diameter and which can advantageously interact with a longitudinal web on the circumference of the bobbin mandrel. The form-fitting connection between the tube body and the bobbin mandrel is then already achieved when the tube body is being pushed.

The winding tube according to the invention is thus particularly suitable for being pulled up in an automated manner on the circumference of a bobbin mandrel. In this case, a relatively large number of winding bobbins can be held firmly on the bobbin mandrel circumference in a bobbin stack.

Drawings

The invention will be explained in more detail below by means of several embodiments of the winding tube of the invention with reference to the accompanying drawings, in which:

fig. 1.1 and 1.2 show schematically in several views a first embodiment of the winding tube according to the invention;

fig. 2.1 and 2.2 show schematically in several views a further embodiment of the winding tube according to the invention; and

fig. 3.1 and 3.2 show schematically in several views a further embodiment of the winding tube according to the invention.

Detailed Description

Fig. 1.1 and 1.2 show a first exemplary embodiment of a winding tube according to the invention in several views. Fig. 1.1 shows a schematic sectional side view of a combination, fig. 1.2 schematically showing a part of the end face of the embodiment according to fig. 1.1 in a tensioned state.

The embodiment according to fig. 1.1 has a hollow cylindrical tube body 1. The tube body 1 is provided with two opposite end faces 2.1 and 2.2. Grooves 5.1 and 5.2 are formed in each end face 2.1,2.2, respectively. The recess 5.1 on the end face 2.1 is delimited internally by a circumferential web 6.1. The recess 5.2 in the end face 2.2 is thus also delimited by the encircling web 6.2. In this embodiment, the grooves 5.1,5.2 are designed with the same inner diameter, wherein the depth of cut determined by the webs 6.1 and 6.2 is also achieved in the same way.

An elastically deformable fixing 3 is arranged in each recess 5.1, 5.2. The mount 3 is formed by two separate rubber rings 4.1, 4.2. Rubber rings 4.1 and 4.2 are arranged in the grooves 5.1,5.2 and are fixedly coupled to the pipe body 1 by means of gluing or vulcanization. The rubber rings 4.1 and 4.2 arranged in the grooves 5.1 and 5.2 are dimensioned in terms of the extent of the axial extension of the rubber rings 4.1 and 4.2 in such a way that the rubber rings 4.1 and 4.2 each have a free end which protrudes over the end faces 2.1 and 2.2 of the tubular body 1.

The tubular body 1 has a circumferential drop tube groove 7 assigned to the end face 2.2 on the outer contour.

For the explanation of the fastening elements 3 provided on the end faces 2.1,2.2, reference is also made to fig. 1.2. Fig. 1.2 shows an end face 2.1 of the tubular body 1 in a tensioned state. The tube body 1 and the further tube body 1 'are coupled to one another with their end faces 2.1 and 2.2' by axial tensioning on the circumference of the bobbin mandrel 8. The end faces 2.1 and 2.2 'are here joined against each other, so that deformation of the rubber rings 4.1 and 4.2' occurs. The rubber rings 4.1 and 4.2' are then pressed together. Due to the incompressibility of the rubber ring 4.1, a clamping force is generated that acts radially between the tube body 1 and the bobbin mandrel 8, which clamping force is simultaneously associated with a very high level of rigidity with respect to radial fixing. The adjacent tubular bodies 1 'are likewise held in a radially tensioned manner apart by the clamping force from the rubber ring 4.2'.

The embodiment of the winding tube according to the invention shown in fig. 1.1 can be clamped radially on the circumference of the tube mandrel only by a plurality or individual axial tensioning. One of the end faces 2.1 or 2.2 can then be assigned, for example, to an axial stop, so that a deformation of the fastening element 3 in the event of an axial displacement leads to a radial tensioning. Axial tensioning on the end face 2.1 or 2.2 associated with the free end of the bobbin spindle can be produced, for example, on the circumference of the bobbin spindle by means of a clamping ring. However, a particular advantage of the winding tube according to the invention is that a plurality of winding tubes can be held on the circumference of the bobbin mandrel in a tube stack by means of self-clamping, which is always activated in an automatic manner.

Since the winding bobbin is provided with the bobbin-falling groove 19 formed to radially surround the circumferential surface of the tubular body 1, the winding bobbin can be dropped from the bobbin mandrel. This process can be performed manually on the winding tube or in an automated manner.

Another embodiment of the winding tube according to the invention is schematically shown in fig. 2.1 and 2.2 in a combined cross-sectional side view and a partial cross-sectional view thereof to one end face. In the embodiment shown in fig. 2.1, the elastic fastening element 3 is formed directly on the end face 2.2 of the tubular body 1. The fixing element 3 is formed by a plurality of individual clamping tongues 9 arranged to protrude axially on the end face 2.1 of the tube body 1. The clamping tongue 9 is designed with a ramp-like outer contour and is arranged in an extension of the inner contour of the tube body 1. The clamping tongues 9 are arranged uniformly on the circumference of the hollow cylindrical tube body 1, wherein the separating webs 13 are arranged between the clamping tongues 9. The circumferential expansion joint 11 is designed to allow the bending capability of the clamping tongue 9 relative to the pipe body 1. The clamping tongues 9 can be bent radially inwards.

The clamping cone 10 is formed in the inner contour of the opposite end face 2.1 of the tube body 1. The clamping cone is delimited on the inside by a bobbin stop 12. The clamping cone 10 is designed with a slope which corresponds to the outer contour of the clamping tongue 9. The end face 2.1 can then be pushed onto the clamping tongue 9 of the adjacent pipe body 1 by means of the clamping cone 10 to obtain radial tensioning.

Fig. 2.2 shows the situation in which two opposite end faces 2.2 and 2.1 'formed on the pipe bodies 1 and 1' interact. The pipe body 1' has been pushed onto the clamping tongue 9 of the adjacent pipe body 1 by means of the clamping cone 10. The defined radial contact pressure of the tubular body 1 and the tubular body 1' on the circumference of the bobbin mandrel 8 when the clamping tongue 9 hits the bobbin stop 12 can be achieved by a predetermined fit size.

In order to fix the end of the tubular body 1 associated with the free end of the bobbin mandrel, a clamping ring with a corresponding clamping cone can be used, so that the last winding bobbin of the bobbin stack can be radially tensioned on each end face of the bobbin mandrel.

The end face 2.1 of the tubular body 1, which is designed with the clamping cone 10, is preferably used for bearing against a bobbin stop, which preferably also has a ramp-like outer contour for receiving the clamping cone 10.

As can be seen from the view of fig. 2.1, a radially encircling doffing groove 19, which is assigned to the end face 2.2 and serves to doff the winding tube from the bobbin mandrel, is provided on the circumferential surface of the tube body.

In order to obtain an end face of the desired identical configuration on the tubular body 1, a further embodiment of the winding tube according to the invention is schematically shown in fig. 3.1 and 3.2. Fig. 3.1 shows a combined cross-sectional side view of the winding tube, and fig. 3.2 shows the end face in the tensioned state on the circumference of the bobbin mandrel.

In the embodiment of the winding tube shown in fig. 3.1, an elastically deformable fastening element 3 is provided on each end face 2.1,2.2 of the tube body 1. The fastening element 3 is formed here by a plurality of elastically deformable clamping tongues 14 on both end faces 2.1, 2.2. The clamping tongues 14 are arranged distributed at even intervals around the tube body 1 and are formed directly on the end faces 2.1 and 2.2 of the tube body 1. The clamping projections 15 are each realized on the end faces 2.1,2.2 of the tubular body 1 at a distance between adjacent clamping tongues 14. The clamping tongues 14 on the circumferential surface each have a clamping cone 16 which is designed to correspond to a clamping cone 17 formed on the inner contour of the clamping projection. In this connection, each of the clamping projections 15 can be connected to the clamping tongue 14 by axially displacing a plurality of tubes 1, wherein the clamping tongue 14 generates a radial contact pressure with respect to the circumference of the bobbin mandrel. The defined radial clamping forces acting on the end faces 2.1 and 2.2 of the tubular body 1 can be produced by the basic design of the material thickness of the clamping bead 15 and of the clamping tongue 14 and the geometry of the clamping tongue and the slopes on the clamping cone 16 and the clamping cone 17. For the joining of several tubes 1 to one another, the clamping tongues 14 and the clamping projections 15 are offset with respect to their angular position on the end face 2.1 with respect to the clamping tongues 14 and the clamping projections 15 on the end face 2.2 of the tube 1.

Fig. 3.2 shows the case in which the end face 2.1 of the tubular body 1 is radially tensioned against the end face 2.2 'of the tubular body 1' on the circumferential surface of the bobbin mandrel 8. The clamping projection 15' is preferably engaged against the tube body 1' in this case, so that the clamping projection 15' presses the lower clamping tongue 14 against the bobbin mandrel 8, which results in a radial fixing of the winding bobbin.

As can be seen from the illustration in fig. 3.1, a plurality of axial grooves 18 are formed on the inner contour of the tube body 1. The axial slot 18 extends completely through the tubular body 1 from the end face 2.1 to the end face 2.2. Such axial grooves 18 are preferably matched to longitudinal webs on the circumference of the bobbin mandrel, so that a centering of the tube body 1 on the circumference of the bobbin mandrel is obtained. Thereby simultaneously achieving anti-rotation protection of the winding bobbin.

In the embodiment of the winding tube according to the invention shown in fig. 3.1, a correspondingly configured annular stop with a clamping projection and a clamping tongue is required to accommodate the winding tube on the bobbin mandrel.

The end face of the tubular body 1 facing the free end of the bobbin mandrel can be fixed, for example, by radially acting clamping blocks, since the axial tensioning of the winding bobbins relative to one another is not required to maintain the radial tensioning. Once the winding bobbins have been moved axially relative to each other with their tubular bodies 1, the radial retention is maintained by the self-locking action between the clamping tongues 14 and the clamping lugs 15. In order to push the stack of bobbins with wound bobbins off and separate on the bobbin mandrel circumference, a bobbin drop groove 19 is provided on the circumference of the tube body 1. The tube body 1 can then fall from the bobbin spindle onto each end face 2.1 or 2.2.

The embodiment of the winding tube according to the invention shown has the particular advantage that the tube body has a high degree of reusability. Such a winding tube can then be used several times for receiving a yarn bobbin. The tube body 1 is preferably manufactured from a plastic material or an alloy. The embodiment of the fastener shown here is exemplary in terms of construction. It is relevant here that radial tensioning is produced on the end face of the tube body 1, which is caused by deformation of the fastening element. The deformation of the fastening element is only initiated by an axial displacement of the tubular body 1, wherein the axial displacement of the tubular body 1 can be carried out by an auxiliary device or a clamping mechanism or an adjacent bobbin.

Claims

1. Winding tube for accommodating a yarn bobbin, having a hollow-cylindrical tube body (1), which tube body (1) is designed to be inserted onto a bobbin mandrel (8), characterized in that a securing element (3) is provided on at least one end face (2.1) of the tube body (1), which securing element (3) is designed to be elastically deformable for radial tensioning of the tube body (1) on the circumference of the bobbin mandrel (8), which securing element (3) is deformable on the tube body (1) by axial displacement of a plurality of tube bodies (1) on the bobbin mandrel (8), wherein the securing element (3) is formed by rubber rings (4.1, 4.2) which are secured in grooves (5.1, 5.2) in the end faces (2.1, 2.2) of the tube body (1).

2. Winding tube according to claim 1, characterized in that the tube body (1) has rubber rings (4.1,4.5) on both end faces (2.1, 2.2), respectively, which rubber rings (4.1,4.5) are designed in the relaxed state to protrude from the end faces (2.1, 2.2) of the tube body (1).

3. Winding tube according to claim 1 or 2, characterized in that the tube body (1) has radially encircling drop tube grooves (19) on the circumferential surface, which drop tube grooves (19) are assigned to one of the end faces (2.1, 2.2).

4. The winding tube according to claim 1, characterized in that the tube body (1) has a plurality of axial grooves (18) designed to be separated on an inner diameter, which plurality of axial grooves (18) pass completely through the tube body (1).