EP0353236B1 - Control device for starting and stopping an open-end spinning element - Google Patents

Abstract

A pivoting control lever (4) which can be put in three working positions serves to control an open-end spinning element. In a first production position, the control lever (4) causes a first drive element, rotating at the production speed, to act on the open-end spinning element. In the braking position, the control lever (4) causes a brake (3) to act on the spinning element and, in the start-up spinning position, the control lever (4) causes a second drive element, rotating at a speed below that of the first drive, to act on the open-end spinning element. A joint control element (7) connected to at least the stops (6) which determine the positions of the control lever (4) for producing and starting-up the spinning operation may move backwards and forwards between at least two switching positions (I, II) in the direction of the movement of the free end (42) of the control lever (4). A stop element (60) connected to the control element (7) forms the stop (6) which determines at least the position, for production or starting-up, of the control lever (4) according to the switching position (I, II) of the control element (7). The stop element (60) forms an integral part of the control element (7). The latter can move not only in the direction of movement (P1) of the free end (42) of the control lever (4), but also transversely to the direction of movement (P1) of the free end (42) of the control lever (4).

Description

The present invention relates to a control device for driving and stopping an open-end spinning element, with a pivotable control lever, which can assume a production position, a piecing position and a braking position, in the production position a first drive running at production speed, in the piecing position one versus the first drive running at a lower speed, second drive and in the braking position a brake acts on the open-end spinning element, and with stops to hold the control lever in one of the three positions.

In order to be able to stop an open-end spinning element at will or to drive it at a fixed first or second speed, it is known to provide a pivotable control lever which can assume three different working positions (WO 86/03792). In the production position, the control lever brings into effect a first drive running at production speed, in the piecing position a drive running at a lower speed than the first drive, and a brake in the braking position. Stops are assigned to the control lever, which hold the control lever in one of the three positions. At least the stops that hold the control lever in the production position and in the piecing position are controllable. The control takes place with the help of an electromagnet, which can be controlled via a switching device which also controls the fiber feed to the spinning device. Around To achieve the necessary time shifts between switching on the fiber feed and controlling the stop, the switching device is followed by a control device. Such a device is complex, in particular if the response times for reactivating the fiber feed and actuating the stop vary due to different materials. In addition, such an adjustment can only be carried out by trained personnel.

The object of the present invention is therefore to design a device of the type mentioned in such a way that any control of the control lever and thus of the spinning element is made possible in a simple manner even by untrained personnel.

This object is achieved in a generic device in that at least the stops defining the production and the piecing position of the control lever are assigned a common control element which can be moved back and forth between at least two switching positions in the direction of movement of the free end of the control lever. With the help of the control element, the stops for the control lever are actuated, whereby the mobility of the control element in the direction of the free end of the control lever ensures that depending on the position of the control element, once the stop for the production position of the control lever and the other time the stop for Firing position of the control lever is effective or disabled. The control lever is controlled completely independently of the control of other units, e.g. switching on the fiber feed, switching on the thread monitor, etc., so that the desired actuation of the control lever can even be achieved manually without complicated changes.

It is not necessary that separate stops are provided for the production position and for the piecing position of the control lever. According to a preferred embodiment of the subject of the invention is on the control element is arranged a stop element which, depending on the switching position of the control element, forms the stop for fixing the production position or the stop for fixing the piecing position of the control lever. If necessary, this stop element can also determine the braking position of the control lever.

In order to achieve a robust and simple design of the subject matter of the invention, the stop element is expediently an integral part of the control element. The control element therefore has the task of determining the respective working position of the control lever with its stop element. For this reason, it is advantageous if the control element for releasing the control lever and for determining the working position of the control lever can also be moved transversely to the direction of movement of the control lever in addition to in the direction of movement of the free end of the control lever. This can be effected, for example, by the control element being displaceable in a backdrop. Advantageously, however, the control element is pivotally mounted for movement transverse to the direction of movement of the free end of the control lever.

The control element with the stop can in principle also be moved parallel to the pivot axis of the control lever in order to release the control lever, but it is of particular advantage in the interest of a particularly robust design of the subject of the invention if the control element having the stop element is movable transversely to the pivot axis of the control lever.

According to a preferred embodiment of the subject matter of the invention, a substantially U-shaped link guide is provided, the ends of which extend transversely to the direction of movement of the free end of the control lever and, together with a stop bolt engaging in the link guide, define two switching positions of the control element, so that the control element is in its two switching positions is securely fixed. According to an expedient embodiment of the device according to the invention, the U-shaped link guide is provided on the control element.

According to a particularly simple embodiment of the control device according to the invention, the control element is pivotally mounted on the control lever. The control element is expediently designed as a two-armed lever, of which the first arm has the link guide and the second arm extends essentially parallel to the control lever and is acted upon by a spring supported on the control lever so that the stop pin in one of the Ends of the scenery guide remains. In order to be able to move the control lever from one working position to the next, it is only necessary to pivot the two-armed lever relative to the control lever, so that the stop pin in the link guide can get from one end to another end.

A particularly simple actuation can be achieved if the control lever has an extension which extends beyond the bearing point of the control element and to which the second arm of the control element extends essentially parallel.

If it is desired that the control element determines not only the production position and the piecing position of the control lever, but also its braking position, it can be provided that the link has an E-shape instead of a U-shape, the three free ends of which are E-shaped Guide link extend transversely to the direction of movement of the free end of the control lever.

According to a preferred embodiment of the subject matter of the invention, the control element is assigned two pivot axes, which can optionally be brought into effect, one pivot axis being assigned to the stop element and the other pivot axis being formed by a stop defining at least one switching position of the control element. In order to release the control lever or to bring it into engagement behind the stop element, the control element is pivoted about the pivot axis, which is formed by a stop defining one of the switching positions of the control element. Despite the release or retention of the control lever, the control element thus remains in the previous switching position.

However, if the control element is now to assume its other switching position, the control element is pivoted about the pivot axis which is assigned to the stop element. In this way, the control element is released from the stop fixing its switching position and can be brought into its other switching position.

If the control element is pivotally mounted, it could happen due to gravity that the control element is pivoted so far that the control lever cannot be returned to its production or piecing position. To prevent this, the control element is expediently assigned a stop limiting its movement in the direction of the control lever.

In the embodiment described above, the control element has to perform movements in three different directions. In order to enable switching movements to be required in only one direction, according to a further embodiment of the subject matter of the invention, the stop element integrated in the control element is assigned a stop element which is arranged on the free end of the control lever and is movable transversely to the direction of movement of the free end of the control lever is in turn associated with a drive element that is movable relative to the control element. The stop element, which is movably mounted in the control lever in this way, can be moved in this way by the drive element movable in relation to the control element such that it comes out of the effective range of the stop element integrated in the control element, so that the control lever moves into its other working position can. The drive element is expediently mounted on the control element in such a way that it can be moved relative to the latter. According to an advantageous embodiment, the drive element is movable in the direction of movement of the control element and has a run-up ramp in order to be able to disengage the stop element which is movably arranged on the free end of the control lever from the stop element integrated in the control element.

The stop element does not necessarily have to be integrated in the control element. According to a likewise advantageous embodiment, the stop element cooperating with the control lever is movably mounted relative to the control element, this stop element advantageously being part of a swivel lever.

To secure the control element in at least one of its two switching positions, according to an expedient embodiment of the subject of the invention, the control element is assigned a stop which can be moved transversely to its direction of movement.

The movements of the control lever can be achieved in an advantageous manner in that the control lever, the control element, the stop movable relative to the control element and the drive element movable relative to the control element for the stop element arranged movably at the free end of the control lever or the stop element movable relative to the control element a drive surface is assigned, which can be acted upon by linearly movable actuating means. Such a design is not only suitable for manual control of the control lever, but can also be used just as advantageously for automatic control of the control lever and thus of the spinning element.

In order to ensure that malfunctions in the movement of the control element from its one switching position to its other switching position are avoided, in an advantageous embodiment of the subject matter of the invention it can be provided that the control element is assigned a guide which, when the control element moves in the direction of movement of the free end of the Control cross movements limited to this.

The control lever is generally acted upon by a spring in the direction of movement which corresponds to the movement of the control lever into the braking position. In order not to apply excessive forces when moving the control lever from the production position to the piecing position to need, the control element is expediently acted upon by a spring opposite to the direction of action of the control lever. The spring can be adjustable, for example in that the spring is assigned a stepless adjustment device.

In order not to have to provide a fixation of the control lever in two directions for the stop element, according to a preferred embodiment of the device according to the invention the spring assigned to the control lever is made stronger than the spring assigned to the control element. In this way, the control lever always receives a force component opposite to the direction of action of the control element, even when it is additionally acted upon by the stop element and the control element.

In principle, the control lever can be assigned to a spinning station in any way. However, in order not only to obtain a functionally advantageous solution, but also to obtain an aesthetically appealing design which also has a low risk of injury, the control element is preferably mounted in a cover for the spinning station.

Nowadays, most open-end spinning devices can be operated by an automatic piecing device. In order not to have to produce two versions for the open-end spinning machine, depending on whether the machine is later intended for manual or automatic operation, the control lever and the control element can, if necessary, also be controllable by such a movable piecing device. In this way it is possible to initially provide a device of the type mentioned for manual operation and to retrofit the spinning machine later with a piecing device. Even if such a retrofit has been carried out, the control lever can still be controlled manually.

According to a simple embodiment of the device according to the invention, if an automatic control of the control lever is provided, the switching position of the control element which determines the piecing position of the control lever can be determined by the stroke of a control means provided on the movable piecing device. An additional stop for fixing this piecing position can then be omitted.

It is not necessary that a stop element is arranged on the control element, which is moved in the direction of the movement of the free end of the control lever. According to a further advantageous embodiment of the device according to the invention, the stops are acted upon elastically in the direction of the control lever and are supported with their ends facing away from the control lever on run-up ramps of the control element, of which the run-up ramp, which is assigned to the stop defining the production position of the control lever, after passing through one larger switching path is effective than the run-up ramp which is assigned to the stop defining the piecing position of the control lever. In this way, depending on the switching path of the control element, only the stop which fixes the production position of the control lever remains in effect, or both stops remain in effect both for the production position and for the piecing position of the control lever, or else both stops become ineffective brought. This ensures safe functioning.

Although the subject matter of the invention can be modified in many ways, all the designs have the common advantage that they enable the control lever and thus the open-end spinning rotor to be controlled in a simple manner, independently of other elements. As a result, such a device is particularly suitable for manual operation, but without excluding its use in connection with an automatic piecing device. The device can be produced economically and is also space-saving, so that it can easily be placed on any spinning device.

Fig. 1 bis 3

eine erste Ausbildung einer erfindungsgemäß ausgebildeten Steuervorrichtung in der schematischen Seitenansicht in ihrer Produktions-, Brems- bzw. Anspinnposition;

Fig. 4

eine Abwandlung der erfindungsgemäßen Vorrichtung in schematischer Seitenansicht entsprechend der in Fig. 1 gezeigten Produktionsstellung des Steuerhebels;

Fig. 5

eine Draufsicht auf eine weitere Abwandlung des Erfindungsgegenstandes in Produktionsstellung;

Fig. 6 bis 8

in schematischer Seitenansicht noch eine weitere Abwandlung des Erfindungsgegenstandes mit einem linear beweglichen Steuerelement in seiner Produktions-, Brems- bzw. Anspinnposition;

Fig. 9

in der Draufsicht und im teilweisen Schnitt die in den Fig. 6 bis 8 gezeigte Vorrichtung in der Produktionsstellung;

Fig. 10

in schematischer Seitenansicht eine Abwandlung des Erfindungsgegenstandes mit linear beweglichem Steuerelement;

Fig. 11

eine besonders einfache Ausbildung der erfindungsgemäßen Steuervorrichtung für den Steuerhebel in der Seitenansicht; und

Fig. 12

eine andere Ausführung des Erfindungsgegenstandes in schematischer Seitenansicht, bei welchem die Anschläge für den Steuerhebel unabhängig vom Steuerelement gelagert, durch dieses jedoch gesteuert werden.

Various exemplary embodiments are explained in more detail below with reference to drawings. Show it:

1 to 3

a first embodiment of a control device designed according to the invention in the schematic side view in its production, braking or piecing position;

Fig. 4

a modification of the device according to the invention in a schematic side view corresponding to the production position of the control lever shown in Figure 1;

Fig. 5

a plan view of a further modification of the subject of the invention in the production position;

6 to 8

in a schematic side view yet another modification of the subject matter of the invention with a linearly movable control element in its production, braking or piecing position;

Fig. 9

in plan view and in partial section, the device shown in Figures 6 to 8 in the production position.

Fig. 10

a schematic side view of a modification of the subject of the invention with a linearly movable control element;

Fig. 11

a particularly simple embodiment of the control device according to the invention for the control lever in side view; and

Fig. 12

another embodiment of the subject of the invention in a schematic side view, in which the stops for the control lever are mounted independently of the control element, but are controlled by this.

The invention is first explained using the example of the embodiment shown in FIGS. 1 to 3. These figures show a spinning station of an open-end spinning machine with a large number of identical spinning stations of the same type, arranged side by side, each with a spinning element. In principle, this spinning element, of which only one shaft 1 can be seen in the figures, can be of any design, for example as a spinning rotor. The shaft 1 of the spinning element is mounted in the usual and therefore not shown manner and is optionally driven by means of a main drive belt 10 or an auxiliary drive belt 11. The two drive belts 10 and 11 are driven in a known manner at different speeds, the speed of the main drive belt 10 corresponding to the production speed of the machine and thus also to the production speed of the spinning element. The auxiliary drive belt 11 is driven at a lower speed than the main drive belt 10, so that a spinning element driven by the auxiliary drive belt 11 also has a lower speed in comparison to a spinning element driven by the main drive belt 10.

In order to be able to drive the spinning element either at a high or a low speed or, if necessary, also to stop it, the two drive belts 10 and 11 are assigned a switching device 2. In the exemplary embodiment shown, the switching device 2 has a two-armed switching lever 20 which is pivotably mounted on an axis 200. On one arm 201, the switch lever 20 carries a main pressure roller 21, which can be brought to bear against the main drive belt 10, while the switch lever 20 carries on its other arm 202 an auxiliary pressure roller 22, which can be brought into contact with the auxiliary drive belt 11. Between the individual spinning positions there are support disks, not shown, which lift the main drive belt 10 or the auxiliary drive belt 11 when released by the main pressure roller 21 or the auxiliary pressure roller 22 from the shaft 1 of the spinning element. In this way, only the main drive belt 10 or the auxiliary drive belt 11 is in contact with the shaft 1 of the spinning element on which it is forced to this system by the corresponding pressure roller 21 or 22 becomes. The arm 201 with the main pressure roller 21 is assigned a compression spring 23 which, when the switch lever 20 is released with the main pressure roller 21, normally holds the main drive belt 10 in contact with the shaft 1 of the spinning element (not shown).

As FIG. 1 shows, a brake 3 for the shaft 1 is connected to the switch lever 20. For this purpose, a brake lever 30 is pivotally mounted on the axis 210 of the main pressure roller 21, at the free end of which a pull rod 31 engages. The brake lever 30 is arranged at an angle to the arm 201 of the switch lever 20. Here, its free end is in closer proximity to the plane defined by the main drive belt 5 than the arm 201 of the lever 20. This arm 201 has a stop 203 on its side facing the brake lever 30, against which a stop near the free end of the brake lever 30 provided driver 32 can be brought to the plant.

The brake lever 30 has in the vicinity of the axis 210 a brake pad 300 which can be brought into contact with the shaft 1 of the spinning element, which is also arranged accordingly in the immediate vicinity of the main pressure roller 21. The location of the brake lever 30 with the brake pad 300 divides the brake lever 30 into a first lever arm 301 which faces the main pressure roller 21 and a second lever arm 302 which faces the free end on which the pull rod 31 engages. The pull rod 31 is connected via a two-armed lever 33, which can be pivoted about an axis 330, to a control lever 4 for the switching device 2 and for the brake 3.

For the sake of illustration, the control lever 4 in the cover 5 is shown rotated by 90 ^° to the switching device 2, which in turn is drawn on a smaller scale compared to the control lever 4 and the control element 7 in order to show the functional affiliation.

The control lever 4 is arranged in a slot of a cover 5 of the spinning station and can be moved relative to it. According to FIG. 1, the control lever 4 is in alignment with the outer surface of the cover 5.

This position is referred to as production position I, since in this position of the control lever 4 the main pressure roller 21 holds the main drive belt 10 in contact with the shaft 1 of the spinning element, not shown, so that the spinning element is driven at a high speed, namely the production rotational speed.

As FIG. 2 shows, the control lever 4 can nevertheless assume a further position, the braking position, in which the brake 3 is brought to act on the shaft 1 of the spinning element, not shown. According to FIG. 3, the control lever 4 can also assume a third position, the piecing position II, in which the auxiliary pressure roller 22 brings the auxiliary drive belt 11 into contact with the shaft 1. Here, the spinning element is driven at a lower rotational speed than the production speed, as is usually desired during the piecing process.

The manner in which the control lever reaches and is held in its various working positions is described in detail below.

The control lever 4 is pivotally mounted on a pivot axis 40 and is acted upon by the pressure spring 23 acting on the switching device 2 via the switching lever 20, the brake lever 30, the pull rod 31 and the lever 33 in the direction of the arrow P 1. For this reason, the control lever 4 is assigned a stop 6, which prevents the control lever 4 from performing a pivoting movement in the direction of the arrow P 1. In the exemplary embodiment shown in FIGS. 1 to 3, this stop 6 is formed by a stop element 60 which is an integral part of a control element 7. This is movably mounted so that it can be moved back and forth between at least two switching positions I and II in the direction of movement of the free end 42, ie the end of the control lever 4 facing away from the lever 33. The stop element 60 can interact with the control lever 4 both in the switching position I and in the switching position II of the control element 7 and forms in the Switch position I of the control element has a first stop, which defines the production position of control lever 4, and in switch position II of control element 7, a second stop, which defines the piecing position of control lever 4.

According to FIG. 1, the stop element 60 is formed by a side wall of an essentially slot-shaped recess 61 in the control element 7. This stop element 60 works together with a counter stop 41 which is arranged on the side surface of the free end 42 of the control lever 4 facing the control element 7. This counter stop 41 has an essentially cylindrical shape and extends laterally into the recess 61 in the control element 7 delimited by the stop element 60.

The control element 7 extends with an operating end 70 to outside of the cover 5. At its end 71 facing away from the operating end 70, the control element 7 carries a stop bolt 72 which engages in a substantially U-shaped link guide 8, which in a manner not shown on the Cover 5 is attached. The two ends 80 and 81 of the link guide 8 extend transversely to the direction of movement of the free end 42 of the control lever 4 indicated by arrow P₁, while the connecting portion 82 substantially in the direction of movement of the free end 42 of the control lever 4 and indicated by arrow P₁ thus also extends in the direction of movement of the control element 7.

The control element 7 is acted upon by a spring 73, namely opposite to the direction of action of the control lever 4 by the compression spring 23 indicated by arrow P 1. For this purpose, a spring bolt 730 is provided on the control element 7, to which the spring 73 is anchored. The other end of the spring is anchored to a spring hook 50 or the like, which is supported by the cover 5.

Figure 1 shows the device in the spinning position, in which the main drive belt 10 rests on the shaft 1 of the spinning element, not shown. If this is to be stopped, the brake lever 30 is by means of the Pull rod 31 brought with its brake pad 300 to the shaft 1. With further movement of the pull rod 31, the brake lever 30 acts as a two-armed lever, which is supported on the shaft 1 of the spinning element and raises the main pressure roller 21 with its lever arm 301 to such an extent that the main drive belt 10 is lifted from the shaft 1 by the support disks, not shown. The switching lever 20 is pivoted so far via the driver 32 and the stop 203 that the main pressure roller 21 does not hold the main drive belt 10 in contact with the shaft 1, but that the auxiliary pressure roller 22 does not yet hold the auxiliary drive belt 11 for contact with the shaft 1 of the spinning element.

As Figure 1 shows, the control of the pull rod 31 is carried out with the aid of the control lever 4, which is pivoted from the position shown in Figure 1 into the position shown in Figure 2 (in the direction of arrow P₁). For this purpose, the control element 7 is pivoted about the stop pin 72 forming a pivot axis by lifting the operating end 70 (see arrow P₂). In this way, the stop 6 releases the counter stop 41. By the action of the compression spring 23 via the arm 201 and the stop 203 of the switch lever 20, the driver 32 and the arm 302 of the brake lever 30, the pull rod 31 and the lever 33 on the control lever 4, this is released in the direction of the control element 7 Arrow P1 moves. This movement of the control lever 4 is limited by a stop, not shown, which stop can be formed, for example, by part of the cover 5.

In a known and not shown manner, a switch can be provided on the cover 5 for actuating a cleaning device for the spinning element arranged in the cover, this switch being actuated by a relative movement of the control lever 4 relative to the cover 5. Cleaning of the spinning element is thus carried out simultaneously with the braking of the spinning element. If, on the other hand, the control lever 4 is brought into the braking position by pivoting the cover 5 without actuating the control element 7, the brake 3 is actuated but not the cleaning device.

If it is now to be spun again, the control lever 4 is first returned from the position shown in FIG. 2 to the position shown in FIG. 1, in which the control lever 4 is held by the stop 6 by latching the counter-stop 41 into the recess 61, since that Control element 7 is always pressed down against the control lever 4 due to the action of the spring 73.

By moving the control lever 4 from the position shown in FIG. 2 back to the position shown in FIG. 1, the brake lever 30 is lifted off the shaft 1 of the spinning element via the lever 33 and the pull rod 31, and the switch lever 20 is released again via the brake lever 30. so that the main pressure roller 21 presses the main drive belt 10 again against the shaft 1 of the spinning element. The spinning element is thus accelerated again. At a given time, if possible even before the production speed is reached, the control lever 4 is pivoted from the position shown in FIG. 1 to the position shown in FIG. 3 in order to drive the spinning element at a reduced but constant speed. This procedure accelerates the spinning element through the main drive belt 10, while the auxiliary drive belt 11 drives the spinning element at a constant rotational speed after a relatively slight speed adjustment.

For the pivoting of the control lever 4 from the production position into the piecing position, the operating end 70 of the control element 7 is pressed in the opposite direction to the arrow P₂, so that the stop bolt 72 leaves the end 80 of the link guide 8 and reaches its connecting section 82. By exerting pressure on the operating end 70 of the control element 7 opposite the arrow P 1, the stop bolt 72 of the control element 7 is moved into the region of the end 81 of the link guide 8. Then no pressure is exerted on the operating end 70 of the control element 7 in the opposite direction to the arrow P₂, so that the spring 73 pulls the end 71 of the control element 7 with the stop bolt 72 into the end 81 of the link guide 8.

When the control element 7 moves in the opposite direction to the arrow P1, the control element 7 has taken the control lever 4, which is engaged with the counter-stop 41 in the recess 61, so that it pivots the brake lever 30 via the lever 33 and thereby also via the driver 32 and the stop 203 the arm 201 with the main drive roller 21 removed from the main drive belt 10. This is thus released and stands out from the shaft 1 of the spinning element by the action of the support disks, not shown. At the same time, the auxiliary pressure roller 22 now brings the auxiliary drive belt 11 into contact with the shaft 1 of the spinning element, so that the spinning element now receives a rotational speed which is determined by the auxiliary drive belt 11. In this position of the control lever 4, the actual piecing is now carried out at a reduced speed of the spinning element, which can be carried out in a manner known per se. For example, a control button 51 is provided on the cover 5 for controlling the fiber feed, which is connected via a switching connection 120 to a control device 12 for a fiber delivery device, not shown, so that the fiber feed to the spinning element is now switched on again.

After piecing, the operating end 70 of the control element is pressed in the opposite direction to the arrow P₂, so that the control element 7 is supported on the counter stop 41 and can be pivoted about the pivot axis formed by this counter stop 41. The stop bolt 72 leaves the end 81 of the link guide 8, reaches its connecting section 82 and is brought back under the action of the compression spring 23 via the control lever 4 and the stop 6 (stop element 60) into the basic position shown in FIG. 1, in which after release of the operating end 70 of the control element 7, the spring 73 pulls the stop bolt 72 back into the end 80 of the link guide 8. This pivoting movement of the control lever 4 enables the auxiliary pressure roller 22 to lift the auxiliary drive belt 11 from the shaft 1 of the spinning element, while at the same time the main pressure roller 21 brings the main drive belt 10 back onto the shaft 1. In this position, the brake lever 30 remains raised from the shaft 1.

The U-shaped link guide 8 with its two ends 80 and 81 extending transversely to the direction of movement of the free end 42 of the control lever 4, together with the stop bolt 72 engaging in the link guide 8, place the two switching positions I (for the spinning position of the control lever 4) and II (for the firing position of the control lever 4).

When the control element 7 moves from the switching position I into the switching position II or back, the control element 7 is guided in the link guide 8 by means of the stop bolt 72. In order to prevent the control element 7 with its stop 6 from releasing the counter stop 41 of the control lever 4 at the same time, a control is assigned to the control element 7 according to the embodiment shown in FIGS. 1 to 4, which in said movement of the control element in Direction of arrow P₁ or opposite to this limited transverse movements. For this purpose, a guide pin 83 is provided on the link guide 8 to which the control element 7 can be brought into contact with its edge 74 when it moves in the direction of the arrow P 1 or opposite thereto. The relative arrangement of guide pin 83 and edge 74 of the control element 7 is selected so that when the stop pin 72 is located in the connecting section 82 of the link guide 8, it is impossible for the stop 6 to release the counter-stop 41 of the control lever 4.

When the control lever 4 is in the position shown in FIG. 2, the control element 7 can no longer be supported on the counter stop 41 of the control lever 4. In order to prevent the control element 7 from assuming an uncontrolled position, a stop bolt 84 is provided on the link guide 8 on the side facing the control lever 4 in accordance with the embodiment shown in FIGS. 1 to 3. The control element 7 in turn has a stop lug 75 in the length range between the stop pin 72 and the stop 6 on its side facing the control lever 4, which is designed in such a way that it limits pivoting of the control element 7 in the direction of the control lever 4 when the control element 7 reaches the switching position I occupies and the stop pin 72 is in the end 80 of the link guide 8, but on the other hand Movement of the control element 7 from the switching position I into the switching position II and the penetration of the stop bolt 72 into the end 81 of the link guide 8 are not impeded.

In the embodiment shown, the control element 7 is acted upon by a spring 73 opposite to the direction of action of the control lever 4 (see arrow P 1). This has the advantage that the spring 73 reduces the force that is to be applied to move the control element 7 from the switching position I to the switching position II. 4, the spring 73 can be adjustable. For this purpose, the spring bolt 730 on the control element 7 can be brought into different positions (see position 730 '), for which purpose several bores are sufficient for a gradual adjustability. If a continuous adjustment is desired, this can be achieved by a corresponding longitudinal slot in the control element 7 or by the spring bolt 50 being held by the cover 5 by means of a thread (not shown) and being able to change its axial position by twisting.

Since it is generally preferred to exert pressure and no tension for a switching movement, according to the exemplary embodiments shown in FIGS. 1 to 3, the spring (compression spring 23) assigned to the control lever 4 is stronger than the spring 73 assigned to the control element 7. This can be achieved, for example, by adjusting the spring 73 accordingly. With such a choice of the force relationships, the control element 7 is brought from the switching position I into the switching position II by exerting pressure opposite to the arrow P 1, while for the return of the control element 7 from the switching position II into the switching position I (and thus for the return of the control lever 4 from the piecing position to the production position) the stop bolt 72 is only lifted out of the end 81 of the link guide 8, while the return itself is brought about by the force of the compression spring 23.

The control element 7 is in the exemplary embodiment shown and described so far both in the direction of the arrow P 1 or opposite thereto, i.e. in the direction of movement of the free end 42 of the control lever 4, movable between two switching positions I and II, both switching positions being fixed. The two stops for determining the production position and the piecing position of the control lever 4 are formed here by a single stop element 60 which, in the switching position I, the stop for determining the production position of the control lever 4 and in the switching position II of the control element 7, the stop for determining the Firing position of the control lever 4 forms.

The control element in the exemplary embodiment shown in FIGS. 1 to 3, apart from in the direction of movement (arrow P 1 or opposite thereto) of the free end 42 of the control lever 4, also executes movements transversely thereto, these movements being shown in FIGS. 1 to 3 Embodiment take place transversely to the pivot axis 40 of the control lever 4. However, this is not an essential requirement for the control device.

In the exemplary embodiment described above, the U-shaped link guide 8 is provided in the cover 5, while the stop pin 72 cooperating with this link guide 8 is carried by the control element 7. As shown in FIG. 4, an arrangement is also possible in which a U-shaped link guide 76 is part of the control element 7, while the stop pin 72 cooperating with the link guide 76 is carried by the cover 5. The link guide 76 is formed in mirror image compared to the link guide 8 shown in FIGS. 1 to 3, so that the free ends 760 and 761 extend with respect to the connecting portion 762 to the side facing away from the control lever 4.

The function of the device shown in FIG. 4 corresponds to that which has already been described with reference to the embodiment shown in FIGS. 1 to 3.

Regardless of whether such a U-shaped link guide 76 is provided on the control element 7 or whether the U-shaped link guide 8 is arranged stationary with respect to the control element 7, the control lever 4 is controlled by exactly the same control movements.

In the exemplary embodiments shown in FIGS. 1 to 4, the control element 7 is assigned two pivot axes which can optionally be brought into effect. One pivot axis is formed by the counter stop 41 of the control lever 4, while the other pivot axis is formed by the stop bolt 72 or 52 (FIG. 11), which fixes the switching positions I and II of the control element 7 in the exemplary embodiments shown. However, if it is provided that during the period during which the spinning element is driven at low speed via the auxiliary drive belt 11, the control element 7 is held by maintaining the pressure opposite to the arrow P 1 on the control element 7 in the switching position II, so it can End 81 or 761 of the guide 8 or 76 can be omitted.

According to the exemplary embodiments described, the control element can be moved both in the direction of movement of the free end 42 of the control lever 4 and transversely thereto. For this purpose, the control element 7 is pivotally mounted. An exemplary embodiment is described below with the aid of FIG. 5, in which the control element 7 is not pivotally mounted, but rather can only be moved linearly. The control element 7 has a sliding block 77, which can be moved back and forth in a straight guide 53. The sliding block 77 carries a spring plate 78 which extends to outside the cover 5 and carries a handle 780 there. On its underside, the spring plate 78 has, in the same way as shown in FIG. 1, a recess 61, the edge of which facing the handle 780 forms the stop 6 (stop element 60). To determine the switching positions I and II, the spring plate 78 has two recesses 781 and 782, in which a stop pin 54 can be brought into engagement alternately.

Fig. 5 shows the device in which the control lever 4 assumes the spinning position. If the spinning element is braked and thus the control lever 4 are released by the control element 7 so that the control lever 4 can come into its braking position by the action of the compression spring 23, it is sufficient to press the handle 780 of the spring plate 78 in the direction of arrow P₃ exercise. The counter-stop 41 thus leaves the recess 61 in the control element 7, so that the control lever 4 is released. So that when the control lever 4 is returned from the braking position to the production position, the counter-stop 41 can automatically get back into the recess 61, the handle 780 on its side facing the control lever 4 has an inclined surface serving as a ramp 783. The control lever 4 thus presses the handle 780 and thus also the spring plate 78 to the side on its return movement from the braking position into the production position when it runs onto the ramp 783 until the counter-stop 41 can snap into the recess 61, whereupon the spring plate 78 is shown in FIG Position returns.

If the control lever 4 is now brought from the switching position shown, which corresponds to the production position of the control lever 4, in its other switching position, which corresponds to the piecing position of the control lever 4, the spring plate 78 from the stop bolt is pressed by pressure on the handle 780 opposite the arrow P₃ 54 lifted and can now be moved opposite to the direction of movement marked by the arrow P₁ until the stop bolt 54 engages in the recess 782 of the spring plate 78. This movement is supported by the spring 73.

If the control lever 4 is to be returned to its production position, the handle 780 is again moved counter to the arrow P₃, so that the stop bolt 54 leaves the recess 782, so that now under the action of the control lever 4 acting on the spring plate 78 compression spring 23rd the control element 7 returns to the position shown in FIG. 5.

As can be seen from FIG. 5, the recess 781 in the spring plate 78 can also be omitted or can be of such a size that it does not serve to determine a switching position of the control element 7, but it is then a requirement that the edge 530 delimiting the guide 53 as Stop for the sliding block 77 is formed.

As is clear from a comparison of the embodiment shown in FIGS. 1 to 4 with the embodiment shown in FIG. 5, the second control movement of the control lever can optionally take place transversely to the pivot axis 40 of the control lever 4 or parallel thereto.

In the embodiment described with reference to FIGS. 1 to 4, the control element 7 is pivotably mounted independently of the control lever 4. A particularly simple embodiment example is described below, using the example of FIG. 11, in which the control element 7 is mounted on the control lever 4. In this exemplary embodiment, the control element 7 is designed as a two-armed lever. One arm is designed as a link guide 76, with which a stop bolt 52, which is stationary or in a cover 5 (see FIGS. 1 to 5), cooperates. The second arm 700 is angled relative to the arm with the link guide 76 and extends essentially parallel to the control lever 4. A spring 731, which is supported on the control lever 4, acts on the arm 700 and thus the control element 7 in such a way that the link guide 76 is pressed against the stop pin 52 so that it is secured in one of its ends 760 or 761. In principle, it is irrelevant whether the arm 700 is located in relation to the pivot axis 701 on the side facing the pivot axis 40 of the control lever 4 or on the side facing away from this pivot axis 40. The design of the spring 731 as a compression spring or as a tension spring is in principle irrelevant and depends only on the relative arrangement of the arm 700 of the control element 7 to the control lever 4. According to FIG. 11, the control lever 4 extends over the pivot axis 701 via the control element 7 out and there forms an extension 43 which is cranked relative to the remaining part of the control lever 4, so that the arm 700 of the control element 7 and the extension 43 run substantially parallel to one another with the interposition of a spring 731 designed as a compression spring.

Since the control lever 4 is acted upon in the direction of arrow P 1 by the compression spring 23 (see FIGS. 1 to 3), it does not matter whether the ends 760 and 761 of the link guide 76 are precisely adapted to the diameter of the stop bolt 52 or not. This also applies to the embodiments shown in FIGS. 1 to 5. It is essential that the side edge of the ends 760 and 761 of the link guide 76 cooperating with the stop bolt 52 are arranged, taking into account the direction of action of the control lever 4 by the compression spring 23, in such a way that they exactly define the corresponding working position of the control lever 4.

In the exemplary embodiment according to FIG. 11, the link guide 76 can be designed to be open on the side facing away from the control lever 4, so that when the control lever 4 moves into the braking position of the stop bolt 52, the link guide 76 leaves. So that the control element 7 can be automatically pushed back with its link guide 76 onto the stop bolt 52 when the control lever 4 returns to its production position, the link guide 76 in this case has a ramp-like insertion bevel 763 formed on one or both sides, while here also the control element 7 a stop 48 limiting its movement is assigned.

Since the control lever 4 does not have to perform a large pivoting movement in order to reach the braking position, the link guide 76 can also be designed in the form of a letter E lying on the side. The connecting section 762 can face the pivot axis of the control lever 4 or can also face away from it, depending on the direction in which the link guide 76 is acted upon by the spring 731. In such an embodiment, in which the U-shaped link guide 76 is expanded to an E-shape, the third end 764 thereof then serves to fix this braking position of the control lever 4. Such an E-shaped link guide can also be designed in accordance with the control element 1 to 5 may be provided.

The previous exemplary embodiments show that the device can be modified in many ways, which can be done by exchanging individual elements with equivalents or through other combinations of the features. For example, In the exemplary embodiments described so far, the stop 6 is always an integral part of the control element 7. However, this is not a requirement. 10 shows an embodiment of the device in which the stop 6 is mounted so as to be movable relative to the control element 7. The control element 7 is designed here as a slide, which is slidably mounted in a guide 55. The slide-like control element 7 carries at its rear end 71 a stop 79 which cooperates with the guide 55. The slide-like control element 7 carries between the guide 55 and its operating end 70 a holder 62 for a pivot axis 620, on which the stop 6 designed as a cranked pivot lever 63 is mounted. This pivot lever 63 has a first lever arm 630 which extends essentially parallel to the slide-like control element 7 in the direction of the operating end 70 and carries at its free end a stop element 631 which is movably mounted relative to the control element 7. This stop element 631, which is movable relative to the control element 7, works together with the free end 42 of the control lever 4, which thus forms a counter-stop.

The other lever arm 632 of the pivot lever 63 extends essentially transversely to the longitudinal extent of the control element 7. It is assigned an actuating button 633 which is mounted in the cover 5 and is acted upon by a compression spring 634. The stroke of the actuating button 633 out of the cover 5 is limited by a stop 635 on the shaft extending into the cover 5. By pressing the button 633 in the direction of the lever arm 632, the actuating button 633 comes with its shaft end to bear against the lever arm 632 and pivots the pivoting lever 63 in such a way that the stop element 631 finally releases the control lever 4. After the actuation button 633 is released, the swivel lever 63 returns to the basic position shown, since it is acted upon accordingly by a compression spring 636 supported on the control element 7.

Another cranked pivot lever 64 is mounted stationary or in the cover 5 by means of a pivot axis 645. One arm 640 carries a catch 641, while the other arm 642 carries an actuation button 643. The arm 642 is acted upon by a compression spring 644 so that the locking lug 641 is held transversely to the direction of movement of the control element 7 in lateral contact with the control element 7, which has a recess 790 on its side facing the pivoting lever 64 for receiving the locking lug 641.

So that the control lever 4 for braking the spinning element can reach the braking position from the production position shown in FIG. 10, the actuation button 633 is pressed, so that the stop element 631 releases the free end 42 of the control lever 4. The control lever 4 can thus come into its braking position by the action of the compression spring 23 and stop the spinning element. A guide device 56 is provided in the guide 55, which holds the control element 7 in place even after the control lever 4 has been released.

The free end 42 of the control lever 4 has a run-up ramp 44 so that when the control lever 4 is pivoted back from the braking position into the production position, this run-up ramp 44 can raise the stop element 631 against the action of the compression spring 636 until it is finally behind the free end 42 of the control lever 4 snaps back into place. A corresponding actuation button 45 can also be provided on the control lever 4 for pushing the control lever 4 back from the braking position into the production position.

The mentioned locking device 56 is designed so that this return of the control lever 4 from the braking position to the production position ensures that the control element 7 is not moved, but remains in its switching position.

If, after the desired run-up of the spinning element, the shaft 1 is to be connected to the auxiliary drive belt 11, this is brought about by moving the control element 7 in the opposite direction to the arrow P 1. The locking device 56 releases the slide-like control element 7. Finally, under the action of the compression spring 644, the latch 641 engages in the recess 790 of the control element 7 and fixes this and thus also the control lever 4, which the control element 7 takes along via the stop element 631, in this switching position.

Finally, if the spinning element is to be driven again by the main drive belt 10, the actuation button 643 is actuated, so that the detent 641 releases the control element 7, which returns by the action of the compression spring 23 to the position shown, in which the stop 79 on the guide 55 runs up and thus defines the production position of the control lever 4.

As shown in FIG. 10, all elements to be controlled are controlled with the aid of actuating forces directed in parallel. These forces can be manually or with the help of actuators 130, 131 ... an automatic device, e.g. a conventional piecing device 13 (see FIG. 12), which runs along an open-end spinning machine with a multiplicity of similar spinning positions. Both the control lever 4 and the control element 7, the stop element 631, which can be moved relative thereto, and the latching lug 641 forming a stop for the control element 7 are thus assigned drive surfaces which are controlled by the control lever 4 or an actuating button 45, by which the control element 7 assigned handle 780, are formed by the actuation button 633 or by the actuation button 643.

The pivot lever 64 and the recess 790 in the control element 7 can be omitted if the control element is to be controlled by adjusting means 130, 131... Of the movable piecing device 13, as is shown in FIG Fig. 12 shown embodiment is indicated. These actuating means 130, 131 ... then have a fixed stroke which brings the control element 7 and thus also the control lever 4 into an end position corresponding to the piecing position of the control lever 4.

Even if it was assumed in the described embodiments that the control element 7 is arranged in a cover 5, this is also not a requirement. The controller can also be used independently of such a cover 5. A cover is therefore not shown in FIG. 11.

A further modification of the devices is shown in FIGS. 6 to 9, with FIG. 6 the device in the production position of the control lever 4, FIG. 7 the device in the braking position of the control lever 4 and FIG. 8 the device in the Firing position of the control lever 4 shows. In this exemplary embodiment, the control element 7 is again designed in the manner of a slide and has an elongated hole 765, in which two guide bolts 550 and 551 engage. The guide bolts 550 and 551 are supported in a manner not shown by the cover 5 or in another way with respect to the control element 7. The elongated hole 765 is dimensioned such that its two stop positions determine the two switching positions of the control element 7, these switching positions corresponding to the production position or the piecing position of the control lever 4. The switching position, which corresponds to the production position of the control lever 4, is fixed with the aid of a latching device 56. For the other switching position, which corresponds to the piecing position of the control lever 4, the slide-like control element has a recess 790 (see FIG. 10) with which the latch 641 of a pivot lever 64 cooperates.

On the side facing away from the swivel lever 64, the control element 7 has as a stop 6 a projection 750 with an edge which is oriented perpendicular to the direction of movement indicated by the arrow P 1 and is designed as a stop element 600 for a counter element 41 of the control lever 4. At the edge forming the stop element 600 is followed by a ramp 601, which is inclined on the one hand in the direction of the pivot axis 40 of the control lever 4 (ie opposite to the direction indicated by an arrow P₂ in Fig. 2) and on the other hand in the direction of the arrow P₁. This ramp 601 is intended to enable the control lever 4 to be pivoted from the production position into the braking position, as will be explained in more detail later. Another ramp ramp 602 follows the ramp ramp 601, which ramp is oriented so that it enables the control lever 4 to be pivoted out of the braking position into the production position.

Since the control element 7 is only displaceable, but cannot be moved transversely to its direction of displacement, the counter-stop 41 is mounted in accordance with the embodiment shown in FIGS. 6 to 9 so that it runs in the longitudinal direction of the run-up ramp 601 or 602 Control lever 4 can dodge. For this purpose, the control lever 4 has a link guide 46, in which the counter-stop 41 is mounted with the aid of a link block 460. This sliding block 460 is acted upon elastically by a compression spring 461 in the direction of the free end 42 of the control lever 4. The stop element 600 integrated in the control element 7 is thus assigned a second stop element (counter stop 41) which is arranged on the control lever 4 and which can be moved transversely to the direction of movement (P 1) of the free end 42 of the control lever 4. In order to effect this movement transversely to the direction of movement of the free end 42 of the control lever 4, the control element 7 is assigned a drive element 65. In principle, this drive element 65 can be arranged stationary or directly on the cover 5. The drive element 65 is movable relative to the control element 7 and, in the exemplary embodiment shown, is mounted on the control element 7 so as to be movable relative to the latter. For this purpose, the drive element 65 also has an elongated hole 650 into which the guide pin 551 extends on the one hand and on the other hand a spring receptacle 766 which is carried by the control element 7. A compression spring 651 is arranged between the end of the elongated hole 650 facing away from the guide pin 551 and the spring receptacle 766.

On its side facing the control lever 4, the drive element 65, like the control element 7 for the two directions of movement of the control lever 4, has two run-up ramps 652 and 653. The ramp 652 is arranged so that it does not normally come into contact with the counter stop 41, but is kept at a distance from it by the action of the compression spring 651, the relative position of the ramp 652 relative to the ramp 601 by the guide pin 551, with which the drive element 65 rests with the end of its elongated hole 650, is determined.

If the control lever 4 is brought into its braking position from the position shown in FIG. 6, pressure is exerted in the opposite direction of the arrow P 1 by exerting pressure on the end embodied as an actuating element 654, the guide pin 551 facing away. The ramp 652 is also displaced in the direction of the counter-stop 41 and the counter-stop 41 is removed from the control element 7 against the action of the compression spring 461.

The counter-stop 41 is displaced parallel to the stop element 600 and thereby reaches the run-up ramp 601. Due to the action acting on the control lever 4 by the compression spring 23, the latter is now pivoted in the direction of the arrow P 1 and thereby leaves the area of influence of the control element 7 and the drive element 65 .

If the control lever 4 is now to be returned to the production position, this is possible by exerting pressure on the control lever 4 in the opposite direction to the arrow P 1. The counter-stop 41 of the control lever 4 runs onto the run-up ramps 653 and 602, then slides along the run-up ramp 653 and / or 601 and finally arrives again behind the stop element 600, which thus retains the control lever 4 in its production position. The locking device 56 is designed so that the control element 7 does not leave its position shown when the control lever 4 is brought from the braking position into the production position.

If the control lever 4 is now to be brought into the piecing position immediately or after a certain time, pressure is exerted on the handle 780 of the control element 7 in the opposite direction to the arrow P 1. The stop element 600, which is an integral part of the control element 7, takes the control lever 4 with its movement opposite to the arrow P 1 via the counter stop 41. When the control element 7 reaches its intended switching position, which corresponds to the piecing position of the control lever 4, the catch 641 of the pivot lever 64 engages in the recess 790 of the control element 7 and fixes the control element 7 and control lever 4 in this position (FIG. 8).

In order to return the control lever 4 to the production position, the latch 641 is lifted out of the recess 790 by actuating the actuation button 643. Due to the action of the control lever 4 by the compression spring 23, the control lever 4 is returned to the position shown in FIG. 6, which is fixed by the end of the elongated hole 765 on the guide pin 550. In this position, the latching device 56 also snaps back into the slide-like control element 7 and additionally fixes it in this position.

It is not a requirement that the stop 6 is an integral part of the control element 7 or is mounted on the control element 7.

FIG. 12 shows an embodiment of the device in which a stop 90 or 91 is provided both for the production position of the control lever 4 and for its piecing position. Each stop is mounted on the cover 5 in a suitable manner by means of a bearing 900 or 910. Each stop has a spring support disk 901 or 911 with respect to the bearing 900 or 910 on its side facing the free end 42 of the control lever 4. A compression spring 902 or 912 is provided between this spring support disk 901 or 911 and the bearing 900 or 910, which presses the stop 90 or 91 in the direction of the control lever 4. The stop 90 or 91 protrudes over the bearing on the side facing away from the control lever 4 900 or 910 and carries at its free end transverse to its direction of movement a bolt 903 or 913. The two bolts 903 and 913 are supported on a control element 9 which is transverse to the stroke direction of the stops 90 and 91 in guides 55 and 57 is slidably mounted. On its side facing away from the bearings 900 and 910, the control element 9 has two overrun cams 92 and 920, of which the overrun cam 92 can cooperate with the bolt 903 of the stop 90 and the overrun cam 920 with the bolt 913 of the stop 91.

The control element 9 extends to outside the cover 5 and here has an actuation button 93. A spring support disk 94 is provided on the control element 9 between the guide 55 and the run-up cam 92. Between this spring support disk 94 and the guide 55 there is a compression spring 940 which always pushes the actuating button 93 out of the cover 5. At the end facing away from the actuation button 93, the control element 9 has a stop 95 which can be brought into contact with the guide 55.

The run-up cams 92 and 920 are in the switching position of the control element 9 shown at different distances from the bolts 903 and 913 assigned to them. If pressure is exerted on the actuating button 93 against the action of the compression spring 940, the bolt 903 of the stop first arrives 90 in the area of the cam cam 92, so that the stop 90 is raised. As the control element 9 continues to move, the run-up cam 920 then reaches the area of the bolt 913 of the stop 91, so that this stop 91 is now also raised.

With the aid of the device described last, the control lever 4 is controlled and thus the spinning element is controlled as follows:

In the production position shown, the control lever 4 is held in the production position by the stop 91. If the control element 9 is pushed to the far left by exerting pressure on the actuation button 93 in FIG. 12 pressed, both stops 90 and 91 are raised. The stop 91 thus releases the control lever, which can thereby be pivoted into its braking position. Then the control element 9 is released again, which returns to the position shown in FIG. 12 under the action of the compression spring 940.

If the control lever 4 is to be returned to the production position, it is pivoted again in the manner already described in the direction of the cover 5, the control lever 4 with its end 42 having a run-up ramp 44 running onto a corresponding slope 914 of the stop 91 and this against the Effect of the compression spring 912 moves until the control lever 4 has reached its production position and the stop 91 engages behind the end 42 of the control lever 4 again.

If the control lever 4 is now pivoted further in the opposite direction to the arrow P 1, this stop 90 is initially displaced by running up the ramp 44 of the control lever 4 onto a slope 904 of the stop 90 until the control lever 4 reaches its piecing position and by the re-engaging stop 90 is secured in this position.

If the control lever 4 is to be returned to its production position after it has been spun on, the control element 9 is displaced by pressing the actuating button 93 to such an extent that the cam cam 92 raises the stop 90 via the pin 903 and releases the control lever 4, but that, on the other hand, the pin 913 has not yet reached the stroke range of the cam 920. The control lever 4 released by the stop 90 can thus only be pivoted in the direction of the arrow P 1 to such an extent that it returns to the production position, since here it comes with its end 42 forming a stop to rest against the stop 91.

The two stops 90 and 91 are thus acted upon elastically in the direction of the control lever 4 and are subject to the control of run-up ramps 92 and 920, which, however, come into effect with different switching paths of the control element 9 in such a way that first the stop for fixing the piecing position of the control lever 4 and only then, after passing through a longer switching path, does the stop 91 become effective for determining the production position of the control lever 4.

In contrast to the previously described embodiments, the last-described device presupposes that two-stage travel paths must be provided for the movement of the control lever 4 and for the movement of the control element 9.

The control of the control element 9 or the control lever 4 can, as shown in FIG. 12, be carried out with the aid of adjusting means 130, 131 which are provided on a piecing device 13 which can be moved along the open-end spinning machine.

Even if it was described above primarily that before the spinning element is switched to the piecing speed, this is previously driven by the main drive belt 10, this does not mean that the spinning element must first be brought to production speed before it is switched to the piecing speed. Rather, the timing is at the discretion of the operator or the programming of the piecing device 13. This timing can be provided so that the piecing lever 4 can also be brought directly from the braking position into the piecing position. It is also possible that the control lever 4 remains in the production position for a shorter or longer time before being transferred to the piecing position. If desired, the spinning element can also be brought directly to the production speed if the piecing can be carried out at this speed.

Claims (30)

1. A control device for driving and stopping an open-end spinning element, comprising a pivotable control lever which can occupy a production position, a piecing position and a braking position, and in the production position has a first drive operating at the production speed, in the piecing position has a second drive operating at a lower speed than the first drive, and in the braking position has a brake acting on the open-end spinning element, the device also comprising abutments for holding the control lever in each of the three positions, characterized in that at least the abutments (6) locating the production position and the piecing position of the control lever (4) are associated with a common control element (7, 9) movable in reciprocation between at least two switch positions (I, II) in the direction of motion (P₁) of the free end (42) of the control lever (4).
2. A device according to Claim 1, characterized in that an abutment element (60, 631) is disposed on the control element (7) and, depending on the switch position (I, II) of the control element (7), constitutes the abutment (6) for locating at least the production position or the piecing position of the control lever (4).
3. A device according to Claim 2, characterized in that the abutment element (60) is an integrated component of the control element (7).
4. A device according to Claim 3, characterized in that the control element (7) is movable both in the direction of motion (P₁) of the free end (42) of the control lever (4) and transversely to the direction of motion (P₁) of the free end (42) of the control lever (4).
5. A device according to Claim 4, characterized in that the control element (7) for movement transversely to the direction of motion (P₁) of the free end (42) of the control lever (4) is pivotably mounted.
6. A device according to Claim 4 or 5, characterized in that the control element (7) is movable transversely to the pivot axis (40) of the control lever (4).
7. A device according to Claim 6, characterized by a substantially U-shaped connecting-link guide (8; 76), the ends (80, 81; 760, 761) of which extend transversely to the direction of motion (P₁) of the free end (42) of the control lever (4) and together with a stop pin (72; 52) engaging in the connecting-link guide (8; 76) locate two switch positions (I, II) of the control element (7).
8. A device according to Claim 7, characterized in that the U-shaped connecting-link guide (76) is provided on the control element (7).
9. A device according to Claim 8, characterized in that the control element (7) is pivotably mounted on the control lever (4).
10. A device according to Claim 9, characterized in that the control element (7) is constructed as a two-armed lever, of which the first arm comprises the connecting-link guide (76) and the second arm (700) extends substantially parallel to the control lever (4) and is acted upon by a spring (731) supported on the control lever (4) so that in the first arm the stop pin (52) remains in one of the ends (760, 761, 764) of the connecting-link guide (76).
11. A device according to Claim 10, characterized in that the control lever (4) has a prolongation (43) which extends beyond the bearing point (701) of the control element (7) and to which the second arm (700) of the control element (7) extends substantially parallel.
12. A device according to one or more of Claims 7 to 11, characterized in that the U-shape of the connecting-link guide (76) is enlarged to form an E-shape.
13. A device according to Claim 6, characterized in that the control element (7) is associated with two pivot axes (72, 41) which can optionally be brought into operation, one pivot axis (41) being associated with the abutment element (60) and the other pivot axis (72) being formed by an abutment (72) locating at least one switch position (I, II) of the control element (7).
14. A device according to one or more of Claims 6 to 13, characterized in that the control element (7) is associated with an abutment (84) limiting its movement in the direction of the control lever (4).
15. A device according to Claim 3, characterized in that the abutment element (600) incorporated in the control element (7) is associated with an abutment element (41) disposed on the free end (42) of the control lever (4) and movable transversely to the direction of motion (P₁) of the free end (42) of the control lever (4) and associated with a drive element (65) movable relative to the control element (7).
16. A device according to Claim 15, characterized in that the drive element (65) is mounted on the control element (7) so as to be movable relative thereto.
17. A device according to Claim 16, characterized in that the drive element (65) is movable in the direction of motion (P₁) of the control element (7) and has a leading ramp (652) so that the abutment element (41) movably disposed on the free end (42) of the control lever (4) can be brought out of engagement with the abutment element (600) incorporated in the control element (7).
18. A device according to Claim 2 or 3, characterized in that the abutment element (631) cooperating with the control lever (4) is mounted so as to be movable relative to the control element (7).
19. A device according to Claim 18, characterized in that the abutment element (631) mounted so as to be movable relative to the control element (7) is part of a rocking lever (63).
20. A device according to one or more of Claims 1 to 3 or 15 to 19, characterized in that the control element (7) is associated with an abutment (41) movable transversely to its direction of motion (P₁).
21. A device according to Claim 20, characterized in that the control lever (4), the control element (7), the abutment (41) movable relative to the control element (7) and the drive element (65) movable relative to the control element (7) for the abutment element (41) movably disposed at the free end (42) of the control lever (4), or the abutment element (631) movable relative to the control element (7) are each associated with a drive surface (4; 45, 643, 780, 633) which can be acted upon by adjustment means (130, 131) movable in a linear manner.
22. A device according to one or more of Claims 1 to 21, characterized in that the control element (7, 9) is associated with a guide (83; 53; 550, 551; 55; 52; 57) which limits transverse movements with respect to the control lever (4) when the control element (7,9) moves in the direction of motion (P₁) of the free end (42) of the control lever (4).
23. A device according to one or more of Claims 2 to 8 and 12 to 22, characterized in that the control lever (7) is acted upon by a spring (73) in the opposite direction to that in which the control lever (4) is acted upon.
24. A device according to Claim 23, characterized in that the spring (73) is adjustable.
25. A device according to Claim 24, characterized in that the spring (73) is associated with a stepless adjustment device (50).
26. A device according to one or more of Claims 23 to 25, having a spring acting upon the control lever in the direction of the braking position, characterized in that the spring (23) associated with the control lever (4) is stronger than the spring (73) associated with the control element (7).
27. A device according to one or more of Claims 1 to 26, in which the control lever is pivotable, as required, together with or independently of a cover for the spinning station comprising the open-end spinning rotor, characterized in that the control element (7, 9) is mounted in the cover (5).
28. A device according to one or more of Claims 1 to 27, having a piecing device which is movable along a plurality of spinning stations each having an open-end spinning element, characterized in that the control lever (4) and the control element (7, 9) are controllable by the movable piecing device (13).
29. A device according to Claim 28, characterized in that the switch position (II) of the control element (7, 9) determining the piecing position of the control lever (4) is locatable by the distance travelled by a control means (130, 131) provided on the movable piecing device (13).
30. A device according to one or more of Claims 1 and 27 to 29, characterized in that the abutments (90, 91) are resiliently acted upon in the direction of the control lever (4) and their ends (903, 913) remote from the control lever (4) are supported on leading ramps (92, 920) of the control element (9), of which the leading ramp (920) associated with the abutment (91) locating the production position of the control lever (4) comes into action after travelling a longer switch path than the leading ramp (92) associated with the abutment (90) locating the piecing position of the control lever (4).

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