EP0949366A2 - Apparatus for clamping an underwound yarn wrap on the spindle of a ring spinning or ring twisting machine - Google Patents

Abstract

An underwinding thread clamping mechanism for a ring spinning or ring twisting machine spindle has sinusoidal interengaging spindle collar and clamping sleeve ends releasable by an actuator (4) used for braking the sleeve with respect to the collar. The apparatus clamps an underwinding thread on a ring spinning or ring twisting machine spindle having, below a fitted bobbin, a fixed collar (2) and an axially displaceable clamping sleeve (3), which can be disconnected by an actuator. The underwinding thread is wrapped by less than 360 degrees around the spindle. Corresponding end faces (10,20) of the collar and the spring-biased rotatable clamping sleeve have interengaging sinusoidal contours over at least part of their circumference and/or diameter. While the actuator is used for braking the sleeve with respect to the collar.

Description

The invention relates to a device for clamping a Thread on the spindle of a ring spinning or ring twisting machine, with the spindle one below an attached cop firmly arranged on her collar and one axially displaceable on it and has a rotatable clamping sleeve, which for lifting a Active clamping connection with the collar via an actuating device in Can be brought into contact with the underwind thread and the spindle wraps less than 360 °.

As soon as the bobbin (Kops) on ring spinning or ring twisting machines is completed, the winding by spinning completed, with the top, back and bottom turns executed can be. To form underwindings, the thread is below the underwind crown in the corrugated area of the whorl of the spindle (Underwind area) guided below the coil sleeve. There the Thread still deposited in a few turns. Only then will the finished The bobbin when doffing from the spindle by means of automatic bobbin changing devices withdrawn from the spindle shaft, the thread between Undercut and Kops tears. However, the thread is still running from the whorl over the ring traveler to the drafting system.

With the subsequent piecing, the ring bench is then raised again, so that the thread is again guided over the underwind crown and at following main spiders can be wound on the new bobbin can.

The windings remain on the whorl of the spindle and must be removed from time to time. The removal can take place during of the main spinning both manually by means of an operable Separation process (DE 29 31 209 C2) and automated using a Cleaning element (G 91 11 455.1).

Although those that arise during the removal of the underwinds Thread remnants through appropriate suction and collection devices can be eliminated, fiber fly arises in the spinning mill. There this can affect the spinning process, it is undesirable and shouldn't arise at all. In addition, suction and Collection facilities for fiber flights with increased investments connected. Also the devices for removing the windings cause considerable costs.

Devices and methods have been developed in recent years by means of which sub-windings are applied to those described above Kind should be dispensable.

The prior art includes a device with an expandable Clamping body which acts on it with the spindle rotating Centrifugal force is shifted downwards (EP 0 292 856 A1). Thereby a nip opens, which partially spins the thread when spinning Had wrapped around and now releases him. To the clamp body to return to its clamping position during spinning, it is according to another known construction (EP 0 358 032 A1) provided with a return element in the form of a ring spring.

A device for handling the thread in a ring spinning machine and a corresponding method for this (EP 0 462 467 B1) are used as an actuating element for an axially displaceable fixing sleeve, the can move between a working and an open position that Ring bench. In addition, a pressure is exerted on the fixing sleeve Reset element, for example a spring, which is parallel to the Longitudinal axis of the spindle shaft acts.

In another known construction for actuating one Fixing sleeve for a ring spinning or twisting machine (EP 0 587 526 A1) acts an actuator for independent control of the locking sleeve together with this and is for this via a backdrop control actuatable. This allows the locking sleeve to be independent of the Parameters of a spinning program, in particular of the spindle speed, but adjusted to the spinning program. By the Actuator can in the locking sleeve from a closed position an open position with release of the underwind thread can be brought. A return element in the form of a spiral spring brings the fixing sleeve back to its closed position.

Another device for clamping a bobbin thread the spindle of a ring spinning or twisting machine (EP 0 775 769 A1) the spindle underneath an attached spinning bobbin their connected covenant and one by means of an actuator axially displaceable on the spindle, with the collar in a clamping active connection bringable clamping sleeve, the underwind thread the spindle wraps with less than 360 °. The with at least one actuator provided actuator is fixed to the Machine arranged; the actuating element is only for actuation with the clamping sleeve can be brought into contact; beyond that is one Device provided by which the ferrule regardless of Action of the actuator held in the clamped position becomes.

Another known construction (DE 196 28 826 A1) uses one Clamping device for threads on a spindle for a spinning or Twisting machine. This device has a fixed clamping element and an axially displaceable, against the fixed clamping element pressable clamping element. The sliding clamping element is with a conical inner surface with which at least one regardless of the movable clamping element movable centrifugal body is engaged.

The present invention has for its object a To create device compared to the known prior art ensures in a simpler manner that the thread during the Spinning with a spindle or whirl winding of less than Clamped 360 ° and released after doffing in the subsequent spinning becomes.

This object is achieved in that together corresponding end faces of the federal government and the by at least one Spring element acted upon at least one clamping sleeve Partial area of the circumference and / or the cross section a wavy Have a contour. This wavy contour results in a good winding of the underwind thread during spinning, whereby on the other hand, it ensures that the underwind thread when picked up the clamping effect is released safely.

The wavy contour comprises at least one curve area; however, preferably several curve areas are provided, the wavy contour can also be carried out on two levels and the inner level is higher or lower.

In a further embodiment of the invention, the axially displaceable Clamping sleeve can be moved by an actuating device. This can for example as a swivel lever, as a camshaft or as a stationary one Set control to be executed.

In a further embodiment of the invention, the actuating device be designed to be movable along the row of spindles, externally driven, for example by a traction device, a cleaning unit (e.g. traveling blowers) or by a separate carriage, or self-driven, for example, by a battery-powered or Electric motor powered by a power rail. Is possible of course also manual operation, e.g. pushing or pulling the Actuator.

A combination of the actuator with a cleaning unit such as a traveling blower is especially of Advantage if this cleaning unit also has a suction device comprises, by means of which the released underwind thread is sucked off can be.

Advantageous further developments result from the others Subclaims.

Fig. 1

eine Seitenansicht einer Textilspindel, teils geschnitten;

Fig. 2a

einen Längsschnitt durch die erfindungsgemäße Vorrichtung in Klemmstellung und durch eine Betätigungsvorrichtung;

Fig. 2b

einen Längsschnitt der Ausführungsform nach Fig. 2a in Freigabestellung;

Fig. 3a

einen Längsschnitt durch eine andere Ausführungsform der Erfindung in Klemmstellung und durch eine Betätigungsvorrichtung;

Fig. 3b

einen Längsschnitt analog der Ausführungsform nach Fig. 3a in Freigabestellung;

Fig. 4

eine Abwicklung der wellenförmigen Kontur;

Fig. 5

eine Seitenansicht der erfindungsgemäßen Klemmvorrichtung;

Fig. 6a

ebenfalls einen Längsschnitt durch eine weitere Ausführungsform der Erfindung in Klemmstellung und durch eine Betätigungsvorrichtung;

Fig. 6b

einen Längsschnitt analog der Ausführungsform nach Fig. 6a in Freigabestellung;

Fig. 6c

eine vergrößerte Darstellung des Bereichs A in Fig. 6a;

Fig. 7

eine Variante der Vorrichtung im Längsschnitt;

Fig. 8a

eine Draufsicht auf eine Betätigungsvorrichtung in Klemmstellung;

Fig. 8b

eine Draufsicht auf die Ausführungsform nach Fig. 8a in Freigabestellung;

Fig. 9a

eine Draufsicht auf eine andere Ausführungsmöglichkeit der Erfindung in Klemmstellung;

Fig. 9b

eine Draufsicht auf die Ausführungsform nach Fig. 9a in Freigabestellung;

Fig. 10

eine Draufsicht auf eine angetriebene Betätigungsvorrichtung;

Fig. 11

eine Draufsicht auf eine selbstgetriebene Betätigungsvorrichtung;

Fig. 12

eine Ansicht einer Ringspinnmaschine in schematischer Darstellung der erfindungsgemäßen Betätigungsvorrichtung und

Fig. 13

eine Ausführungsmöglichkeit eines Zugmittels schematisch in Ansicht.

The invention is described below with reference to exemplary embodiments shown in the drawing. The drawing shows:

Fig. 1

a side view of a textile spindle, partially cut;

Fig. 2a

a longitudinal section through the device according to the invention in the clamping position and through an actuating device;

Fig. 2b

a longitudinal section of the embodiment of Figure 2a in the release position.

Fig. 3a

a longitudinal section through another embodiment of the invention in the clamping position and by an actuating device;

Fig. 3b

a longitudinal section analogous to the embodiment of Figure 3a in the release position.

Fig. 4

a development of the undulating contour;

Fig. 5

a side view of the clamping device according to the invention;

Fig. 6a

likewise a longitudinal section through a further embodiment of the invention in the clamping position and through an actuating device;

Fig. 6b

a longitudinal section analogous to the embodiment of Figure 6a in the release position.

Fig. 6c

an enlarged view of area A in Fig. 6a;

Fig. 7

a variant of the device in longitudinal section;

Fig. 8a

a plan view of an actuating device in the clamping position;

Fig. 8b

a plan view of the embodiment of Figure 8a in the release position.

Fig. 9a

a plan view of another embodiment of the invention in the clamped position;

Fig. 9b

a plan view of the embodiment of Figure 9a in the release position.

Fig. 10

a plan view of a driven actuator;

Fig. 11

a plan view of a self-actuated actuator;

Fig. 12

a view of a ring spinning machine in a schematic representation of the actuating device according to the invention and

Fig. 13

an embodiment of a traction device schematically in view.

In Fig. 1 is a side view of the circumferential part of a textile spindle 1 with sleeve holder, pot knife 18 and whorls with tread for a tangential strap and foot bearing, partly cut shown. 2a and 2b, the spindle 1 has below of the pot knife 18 has a collar 2 arranged thereon and below one acted upon by a spring 5, axially displaceable on the spindle and rotatably mounted clamping sleeve 3. This clamping sleeve 3 is acted upon by an actuator 4 which z. B. from a web 23, which is on a horizontal, rotatable shaft 22nd is attached.

In the embodiments of FIGS. 2a, 2b and 3a, 3b, the mutually facing end faces 10 and 20 of the federal government 2 and the Clamping sleeve 3 is a wavy, shown in more detail in FIG Contour W extending towards the edge. The wavy contour W can also only over a partial area of the end faces in the circumferential direction and / or extend in diameter.

When spinning, the delivery of the drafting system of the spinning machine, the movement of the ring bench and the spindle rotation like this matched to each other that a schematically shown in Fig. 2b Unterwindefaden 15 wraps around the spindle 1 with less than 360 °. He thereby lies between the inwardly narrowing slot the collar 2 and the ferrule 3 and there when changing the cop held.

If after restarting the spinning machine after a cop change Running spindle 1, the shaft 22 according to FIG. 2a in the direction of arrow I. is rotated, the ferrule 3 out of its rotation in Moved to a standstill or at least braked in relation to the spindle. It is countered by the contours of the contours W. Effect of the spring 5 from the clamping position according to Fig. 2a in the in Fig. 2b shown release position moved down. This will make the Clamping of the underwind thread 15 is released and it can be due release the centrifugal forces acting on it from the textile spindle 1 and carried away.

In the embodiment of FIGS. 3a and 3b, the actuating device 4 a cam 23 'arranged on the shaft 22'. Fig. 3a again shows the clamping position, i. H. the end faces 10 and 20 of the federal government 2 and the clamping sleeve 3, as already stated above, are in the active position. 3b on the shaft 22 'of the Cam 23 'rotated counterclockwise, so it moves axially sliding clamping sleeve 3 against the action of the spring 5 down and presses the clamping sleeve 3 away from the collar 2 and thereby releases the Active connection between the two end faces 10 and 20.

Simultaneously braking or stopping everyone on the spindles mounted clamping sleeves 3 of a spinning machine loads the drive considerably. To avoid this, the individual spindles associated actuators 23 and 23 'stepped at an angle be offset against each other so that braking or stopping successively.

In Fig. 4, the undulating contour W is in the form of a development shown. 5, both the collar 2 and the axially movable clamping sleeve 3 has this wavy contour W.

In the embodiment according to FIGS. 6a to 6c, the waves are wavy Contours W 'arranged in rings 12 and 13, respectively corresponding end faces 10 and 20 of the federal government 2 and the Clamping sleeve 3 are assigned on their inner circumference. The one with the Areas of the end faces 10 and 20 that come into contact with one another in this case have no wavy contours W, but are only spherical.

6a shows the device according to the invention in the clamped position: here engages the undulating contour W 'of the ring 12 in the undulating Contour W 'of the ring 13, collar 2 and ferrule 3 lie against each other and form the - in this case flat - slot into which the Underwind thread 15, as shown in an enlarged detail in FIG. 6c, inserted. Now the clamping sleeve 3 6b braking or pushing downward, are Collar 2 and clamping sleeve 3 through the contours W 'of their rings 12 and 13 respectively pushed apart and the underwind thread 15 is released.

It is understood that the kinematic reversal of the previously described Embodiments of the fixed collar 2 'also below and the axially displaceable clamping sleeve 3 'according to FIG. 7 can be arranged above this can. The actuating element 23 'can here also the clamping sleeve 3' brake or - as indicated in the drawing - print upwards, to release the engagement of the contours.

According to FIGS. 8a and 8b, the actuating device 4 comprises one horizontal rod 22 '', the drive unit 25 so is longitudinally displaceable that the arranged on them Actuators 24, for example a web with an abrasion-resistant Covering, the outer circumference of the clamping sleeve 3 according to Fig. 8a releases (Clamping position) or acted on according to Fig. 8b (release position).

In the embodiment according to FIGS. 9a and 9b there is also a horizontal rod 22 '' used with the help of drive units 25 is movable against the spindles 1. 9a are the ferrules 3 released, whereas according to Fig. 9b the actuators 24 of the actuating device 4, the outer circumferences of the clamping sleeves 3 act upon.

10 shows a schematic top view of an actuating device 4 with one movable along the row of spindles Actuating unit 26. This can also have a web have abrasion-resistant covering and is a traction means 25 'in Direction of arrow moves, one after the other the respective extent of Clamping sleeves 3 acted upon to release the thread. Obviously here the spindles 1 are actuated one after the other.

11 there is also the possibility that the actuator 4 is designed as a self-propelled unit 26 ', for example with accumulator drive, which is on a rail 40 is performed, or as an electric motor drive with busbar.

12, the actuator unit 26, which is part of the Actuating device 4 is connected to a traction means 25 ', which is designed as a rotating belt drive. As from Fig. 13 recognizable, the traction means 25 ', d. H. the belt drive, at least partially a drive roller 30 which is connected to a drive motor 35 is connected, and deflection rollers 31, 32, 33 and 34. Die Actuating unit 26 is connected to one of the strands of the traction means 25 ' connected and is taken along with its circulation. It goes without saying that the traction means 25 'is controlled so that the Actuating unit 26 between the deflection rollers 32 and 33 on the Row of spindles runs back and forth.

Claims (16)

Device for clamping a bobbin thread on the spindle (1) a ring spinning or ring twisting machine, the spindle below a attached cop a waistband attached to it (2) and has an axially displaceable clamping sleeve (3), which to release a clamping active connection between the collar (2) and clamping sleeve with an actuating device (4) in contact can be brought and the underwind thread the spindle with less as a 360 ° loop, characterized in that together corresponding end faces (10, 20) of the federal government and the at least one spring element (5) can be pressed against the collar (2) and at least on the spindle rotatably mounted clamping sleeve (3) a partial area in the direction of the circumference and / or Diameter coordinated and interlocking have wavy contour (W) and that the actuator (4) at least for braking the clamping sleeve (3) is set up opposite the collar of the spindle. Apparatus according to claim 1, characterized in that the undulating contour (W) over the entire circumference and / or over the entire diameter of the end faces (10, 20) of the collar (2) and the clamping sleeve (3) extends. Device according to claim 1 or 2, characterized in that the end faces (10, 20) of the federal government (2) and the clamping sleeve (3) in Cross section are parallel to each other. Device according to claim 1 or 2, characterized in that the end faces (10, 20) of the federal government (2) and the clamping sleeve (3) in Cross-section convex / concave against each other. Device according to claim 1 or 2, characterized in that each of the corresponding end faces (10, 20) of the federal government (2) and the clamping sleeve (3) has an inner ring (12, 13), the end face at least over a portion of its circumference is provided with the undulating contour (W). Device according to one or more of the preceding claims, characterized in that the clamping operative connection between the collar (2) and the clamping sleeve (3) dissolving actuating device (4) each one movable against the clamping sleeve (3) Actuating element (23, 23 '; 24; 26, 26'). Apparatus according to claim 6, characterized in that all Actuators (23, 23 ') together around a horizontal axis (22, 22 ') are pivotable. (Fig. 1 to 3b, 6a 6b) Apparatus according to claim 6, characterized in that all Actuators (24) together along the row of spindles (1) can be moved. (Figs. 8a and 8b) Apparatus according to claim 7 or 8, characterized in that the actuating elements (23, 23 ') at an angle or in the actuating direction the actuator (4) offset from each other are. Apparatus according to claim 6, characterized in that all Actuators (24) together towards the spindles (1) are movable. (Figs. 9a and 9b) Device according to one or more of the preceding claims 1 to 5, characterized in that the actuating device (4) an actuating element which can be moved along the spindles (1) (26). Device according to claim 11, characterized in that the actuating element (24) with a along the spindles (1) extending drive means is connected. (Fig. 10) Apparatus according to claim 12, characterized in that the Drive means is designed as a rotating belt drive (25 '). (Fig. 12, 13) Device according to claim 11, characterized in that the actuator as a separate feed drive having unit (26 ') is formed. (Fig. 11) Device according to one or more of the preceding claims 1 to 5, characterized in that the actuating device (4) along one along the ring spinning and / or twisting machine moving cleaning unit (26) is attached. Apparatus according to claim 15, characterized in that on the Cleaning unit (26) at least one blow-off nozzle and / or at least one suction nozzle for the one to be removed or detached Underwind thread is attached.

Images