GB2224042A - Winding: supporting end of bobbin tube - Google Patents

Description

A A-1653 Centering plate bearing 2 2 2' 0 4 2 The invention relates to a

spooling device for winding a thread according to the first part of claim 1. This spooling device is known through the EU-PS 0 176 020.

With a known spooling device, the actuation of the plates is performed by a guide device, which serves the spool change. It is Mounted pivotally in the plate axis positions, position. position, clamping position at the same time; when the gulde device is lowered into the admission position when the spool lever is lifted upwardly for lifting off the full spool, the centering plates are released for disengaging the fUll spool. As there can be considerable length differences amongst the commercially available spool tubes, the achievement of the predetermined end positions of the guide device can be especially prevented or be centering to simplify centering within the arms of the spool lever in two end an Upper resting position, and a lower working When the guide device is pivoted into its resting the centering plates are brought into their 1 A-1653 made very difficult, when these are arrested in the two end positions by stopping devices. Furthermore, the known device does not offer the possibility to yield to length changes arising during the spooling process.

With the clamping mechanism of the known spooling device, the centering plate is mounted on a-parallel spring, which can be brought into the relaxed position by rotating a threaded bush, and by which the centering plate is guided in the working position. Therefore, with the known spooling device, due to the length changes of the parallel spring of the centering plates during its displacement in the clamping position arising during the axial displacement of the centering plate, the centering plates are not guided exactly, above all, the. guide pin has to have sufficient clearance to be able to avoid these length changes transversely to its axis. This to construction also means that the adjust to the position of the front This leads to the axes of the centering properly when the front surfaces are not necessary clearance d u pp I a te can the tube.

aligning exactly cenrering surface of plates not absolutely 1 A-1653 plane parallel. As the distance between clamping of the parallel spring and the centering plate axis can only correspond to the necessary dimension for exactly aligning the centering plates with a certain tube length, differences necessarily arise when the tube length varies or changes during the spool travel- Therefore, an exact axial alignment of the centering plates is not guaranteed with the known device.

The object of the invention is to provide a spooling device which always guarantees the aligning adjustment of the centering plates, independent of the length of the spool tube.

This object is achieved by a spooling device-- according to claim 1- By aligning a centering plate mounted rotatably in a clamping bush in a guide bUsh mounted in an arm of the 's:.; p o C) I lever, the exact guiding in axial direction is ensured. 1 n that way, the clamping bUSh supported by a coaxial coil spring engages in a thread of the guide bush, its pitrh is not self-restricting relatively to the application direction of the spring force at the clamping bush, the compensation of A1653 different spool tube lengths as well as length changes arising during the spooling process are guaranteed. A manual means mounted on the clamping bush makes it possible to rotate the clamping bush from outside for releasing and chucking of the centering plate with respect to the spool lever arm in both directions.

Embodiments and further developments of the spooling device according to the invention result from the subclaims. With the aid of the embodiment shown in the enclosed drawing of the invention, this is explained further.

Tt shows:

fig. 1 view onto a spool clamped in the spool lever; fig. 2 axial section through a centering plate of the spooling device according to the invention; fig. 3 view onto the outer side of the centering plate.

Figure 1 shows a view onto the spooling device according to the invention, which comprises a spool lever 1 with an axially, 1 1 A-1653 against spring force, releasable centering plate 9 according to the invention at a spool lever arm 1.1, pivotal around the pivot axis 39 between the driving position and the lifted position carrying a full spool 40.

The spool lever at the pivot mounted between thereon pivoting to the spooling 1.1 and at the the arms comprises of a yoke which is mounted pivotally axis 39 as well as arms 1. 1 and 1.2, which are ends of the yoke. A spool tube can be clamped. The spool tube and the spool 40 to be formed are Mounted on a driving roller (not shown). By around the pivot axis 39, the spool lever 1 can yield increasing spool diameter with the progress of process. The spool tube 11 is mounted between the 1.2. For the pivotal mounting, centering plate.-, 9 used, which are mounted rotatably on the arms 1.1 and 1.2 align with each other. For the clamping of the spool tube at I t. he arms are and 1 -1, east one of the centering plates 9 can carry out an axial movement for widening the distance to the other centering plate. For clamping, the centering plate can be moved axially in such a way, that the distance decreases.

A-1653 -6 A clamping lever 17 and a dead centre easily accessible, on the outer side 1.1. As becomes clear from the the centering plate 9 according to the universally because of its simple uncomplicated spring 20 are mounted, of the spool lever arm further description, invention can be used construction and the operation means. Due to the special form of it.s construction, it functions without problems, can be brought in into its two end positions in a simple and safe way, and especially independent of arising length differences of spool tubes 11. Therefore, for example, when using centering plate according to the invention in a known spooling device described above, the achievement of the intended end positions of the guide device there is guaranteed, even with different clamping lengths.

is t h e t h e Figure,s 2 and 3 serve as closer explanation of the construction and functioning of the spooling device according to the invention- A threaded bush 3 having an inner thread 4 is rigidly connected to the arm 1-1 of the spool lever. In the embodiment depicted, it is part of the arm 1.1, but, for 1 A-1653 example, it can also be connected via a flange or other customary means in a suitable manner at the spool lever arm 1.1 or 1.2. A clamping bush 5 is is screwed into the threaded bush 3 with its outer thread, and can be displaced axially by rotating it with respect to the threaded bush 3. Threaded bLJ,-:.,-h 3 and clamping bush 5 are in the form of a pot in the embodiment depicted, their openings are opposite to each other A bottom 8 terminates the threaded bush 3 on the outer side, while the bottom 27 of the clamping bush 5 comprises a pivot pin 30 for accommodating the centering plate 9 on its side pointing to the opposite spool lever arm 1.2. A bearing IL) mounted on the pivot pin 30 lying adjacent of a collar 36, secured by a fastening 31, for example by a snap ring.

centering plate 9 is mounted on the bearing 10 fixed axially SUc h a way together with the clamping bLJSh 5- A spring 7 i s clamped between the bottom a of the threaded bush 3 and the bottom 27 of the clamping bush 5 and is centered by a circular cylindrical projection of the clamping tube bottom 27 projecting into the inside of the clamping bush. The design and object of the spring 7 are described later in more detail.

to is and The in A-1653 In the circumference of the threaded bush 3, a window 12 provided, through which a projection 13 mounted on circumference of the clamping bush 5 projects towards outside over the circumference of the threaded bush. In depiction of figures 2 and 3, this projection 13 is in a simple manner as part of the clamping bush 5, usually, it is only inserted into the circumference of clamping bush 5, after the clamping bush 5 is threaded into threaded bush 3. The window 12 for the projection is dimensioned so that it leaves sufficient clearance for projection 13 in axial and in circumference direction for i s the the the reproduced but the the 13 the t he necessary movements for chucking and releasing the centering plate 9. The axial extension of window 12 is shown in figure 2, its extension in circumference direction is shown in figure 3.

A coupling ring 14 is mounted respect to the threaded bush 3 an the threaded bush 3 and is located spool like.

loosely and rotatable. outer side of axially on one hand by lever arm 1.1, on the other hand by a snap ring An axial slit projecting into the circumference with thp. t he. or t h p. of the A1653 coupling ring 14 over part of its length forms two stops 15, 16 (figure 3), which include the projection 13 projecting correspondingly from the window 12 into the threaded bush 3 of the clamping bush 5. The clearance is adjusted, so that an exact adjustment of the movements of the coupling ring 14 the end positions, especially at the clamping position of centering plate 9 compensation of different clamping lengths is Nevertheless, it may not be of such a size, that release of the full spool 40 is endangered.

be-comes unnecessary, and that especially at the the made possible.

the safe A clamping 1 e v er 17 is mounted ar the coupling ring 14, extending radially and essentially parallel to the outer surface of the arm 1.1, with which it (14) is roratable with respect to the threaded bush 3. A bearing boss 35 is provided approximately opposite of the mounting point of the, clamping lever 17, the function thereof is described later on_ Prefercbly.. the angular freedom of the clamping lever 17 or of the coupling ring 14 is restricted by two ring stops 18, 19Nevertheless, the angular freedom is dimensioned so that the A 1653 necessary clearance of the centering plate 9 or of the clamping bush 5 in the threaded bush 3 is guaranteed.

The described construction of the centering plate bearing results therein that the axial displacement of the centering plate 9 follows by rotating the clamping bush 5 with respect to the threaded bush 3. Therewith, the centering plate 9 is pressed into its clamping position by the spring 7 and kept in the clamping position, while a rotation of the clamping bush 5 with respect to the action of the spring 7 is necessary.

1 The choice of a torsion spring 7A shown in figure 2 with a working direction in the sense of clamping of the centering,plate 9 has been proved to be of advantage- With the depicted embodiment, it is anchored in a spring slit 29 in the centering stop of the clamping bush bottom 27 on the one hand, and at an abutment 28 connected to the bottom 8 of the 3 on the other hand. A change of the spring pre-tensioning can for example be achieved with the bush bottom 8 threaded thereto (see figure 2) by threading the bottom 8 in a position threaded bush 1 A-1653 11respectively opposite to the threaded bush 3. With a further development. not depicted, the abutment 28 is a round disc or mounted on such. This disc fits into a corresponding bore in the bottom 8 of the threaded bush 3. It is secured against mutual axial movement in the bore by known means, furthermore, disc and bore are secured from mutual rotation by providing interfitting axially directed toothing on the circumference, especially a fine toothing. By rotating the abutment 28 loosened from the toothing and re-inserting in the desired position, the spring pre-tensioning can bp. adjusted to a tine. grading, depending on the chosen tooth pitch- A dead centre spring 20 supports the movement of the centering plate 9 in its two end positions and holds it resiliently in its end positions. It is connected, on the one hand, to the outside of the spool lever arm 1.1 (holder 33) therewith, and, an the other hand, to the bearing boss 35 of the coupling ring 14 mentioned above via pivot bearings 25, 26. The dead centre spring (figures 2 and 9) is a strong compression spring 20, which is supported, in the depicted embodiment, in its straight A1653 form by a telescopic guide comprising a support tube 21 and a support bar 22 guided in the tube bare 34- But it can also comprise only of a sufficiently stiff simple compression spring. With corresponding choice of its paint of engagement at the coupling ring 14, a strain spring can also be chosen as deed centre spring 20- In the depiction of figures 2 and 2, the closed end support tube 21, developed as tube boss 25, forms, with the holder 33 at the arm 1.1, a of t h e to g et h e- r pivot bearing 25; a further pivot bearing for the dead centre spring 20 is formed by the free end of the support bar 22, ending in a bar boss 24, of the coupling ring 14- The tension force of the compression spring comprising the dead centre spring 20, is dimensioned so, according to the invention, that the effect of its force over the projection 13 on the clamping-bush 5 exceeds that Of spring 7 considerably. The dead centre spring 20 essentially runs in the radial extension of the coupling ring radius towards spring holder 33 at the lever arm!.I- 4 A- 1653 Now, when the full spool 40, at the end of the spool is to be released from the clamping position shown in to 3, the coupling ring 14 is pivoted anti-clockwise clamping lever 17. The projection 13 of the clamping travel f igures 1 over the. bush 5 is carried by the stop 15 at the coupling ring 14, and moves the clamping bush 5 anti-clockwise away from the spool tube 11 by the rotating movement, so that this is released. At the beginning of the clamping lever movement, the dead centre spring 20 is compressed at first, until the dead centre position is reached. When the dead centre position is exceeded, the dead centre spring 20 exerts a torque, increased by further rotation of the coupling ring 14, on the coupling ring 14, until the effect of the spring 20, dependent on its dimension, is finally so large, that it presses the clamping bush 5, and therewith the centering plate 9 into the release position, against the force of the spring 7, without further force being exerted on the clamping lever 17, and keeps it in this position- For clamping a new spool tube, it is sufficient to rotate the coupling ring 14 with the clamping lever 17 so far in the other direction, until the dead centre spring 20 has 1 A-1653 1 exceeded its dead centre position, after which both dead centre spring 20 and spring 7 bring the centering plate 9 into the clamping position over the clamping bush 5. When the angular freedom of the clamping lever 17 limited by the ring stops 18 and 19 is chosen with a sufficient width, both springs 20 and 7 work together when clamping the spool tube 11. The amount of clearance left for the projection 13 between the stops 15 and 16 also determines, for example, the amount of insensitivity with respect to the length differences arising with the spool tubes.

1 A A-1653 C I a i ms 1. Spooling device for winding a thread onto a spool tube with a U-shaped lever, with two centering plates, which are mounted freely rotatably on both of the free ends of the spool lever on a common axis, wherein the spool lever is mounted pivotally around a pivot axis parallel to the spool for the spool from the driving roller and wherein at least one of the centering plates for chucking and releasing a spool tube is movable in axial against spring force, wherein the centering rotatably mounted in a clamping bLJ-':;h, the clamping bush is guided in axial direction in a guide bush mounted on an arm of the spool lever, and engages with a thread in a thread of the guide bush, the clamping bush is supported against the spool lever arm by a coaxial coil spring and the thread pitch relative to the direction of attack of the spring at t he. clamping bush i _q chosen, S 0 that the threaded connection between the clamping bush and the spool lever arm is not self-restricting, and that the clamping bush axis for placing the spool at a driving roller and lifting direction P1 ate i S 3.

4.

A-1653 -t(-n - comprises a handling means by which it can be rotated against the spool lever arm.

2, Spooling device according to claim 1, wherein the clamping bush is mounted in the guide bush, and the threaded bush comprises a window in its wall reaching over part of its circumference, through which the clamping bush projects by means of a projection.

Device according to claim 1 or 2, wherein the spring is torsion spring, which is supported on the spool lever arm, whereby the torsion spring is pre-tensioned in the sense that its torsional moment rotates the clamping bush with respect to the threaded connection in the clamping sense of the centering plate, whereby the pitch of the thread lies in the automatic locking region with respect to axial force introduction.

Device wherein 1 according to one of the preceding claims, the handling means provided for rotating the J A-1653 0 clamping bush is pivotally mounted on the arm connected to the clamping bush with clearance.

Device wherein and is according to one of the preceding claims, a freely rotatable coupling ring with clamping lever is mounted on the circumference of the guide bush and the coupling ring comprises two stops on circumference, which take with clearance the projection the clamping bush over the guide bush.

6. Device according to of the coupling ring stops.

its of c laim 5, wherein the turning capacity is limited an the guide clamp by ring Device according to claim 5 or 6, wherein the coupling ring is pressed into its two end positions by a dead centre spring.

8. Device according to claim 7, wherein the dead centre spring is a compression spring which engages, in the central 1 A1653 9 - k Ce position of the coupling ring, with the spool lever arm with one end, and with the other end radially at the circumference of the coupling ring.

9. Device according to claim 7 or 8, wherein the tensional force of the dead centre spring exceeds, in its effect on the clamping bush, the tensional force of the spring loading the clamping bush in the clamping direction of the centering plate.

t t Published 1990 atThePatentOfftce,State House, 56"71 High Holbor-,i, LoridonWClR4TP.Further copies Tnaybe obtainedfroin The PatentOfftce Was Branch, St Mary Cray, Orpington, Kent BR5 3RD. Printed by Multiplex techniques ltd, St Mary Cray, Kent, Con. 1 87