EP1188850A2 - Open-end spinning device - Google Patents

Abstract

The open-end spinner has a sliver loosening unit (4) in an easily-released mounting at the connecting bracket (30) of its straight guide (3), at the spinning box housing (2). A sliver loosening roller (12), to break the sliver down into fibers, is within the sliver loosening unit with its own motor together with the sliver take-in cylinder (14) powered by a step motor (15). The sliver loosening unit is mounted to pivot on a swing axis in a guide slit at the mounting bracket, which is open to the front, held in place by a sprung locking bolt which slides within a drilling at the sliver loosening unit body. A second straight guide (70) is at the mounting bracket, with guide bolts (63) which fit into guide drillings (69) at the mounting body (71) of the sliver loosening unit. At least one guide bolt has a locking groove (66), to be engaged by manual locking levers (64) riding in vertical guide slits (65) near the guide drillings at the mounting body. A spring at the locking lever holds it in the engaged position. An electromotor (13) with an outer rotor drives the sliver loosening roller. A coupling plate (34) links the power supply lines (35-38) at the mounting bracket, working with a coupling (45) at the sliver loosening unit. A centering unit (46) is between the mounting bracket and the bearing pedestal (26) at the bearing assembly (5) for the spinning rotor, with at least one centering component (47) as a key holder. A static funnel (39) to catch dirt, and its pneumatic waste disposal system (40), are located under the sliver loosening unit. The spinning rotor (7) is powered by a single electromotor drive (6). The axis (48) of the sliver loosening roller and the axis (49) of the sliver take-in roller are orthogonal to the axis (50) of the spinning rotor.

Description

The invention relates to an open-end spinning device according to the Preamble of claim 1.

There are several related to rotor spinning machines Embodiments of open-end spinning devices are known.

DE 43 23 213 A1 describes, for example, an open-end spinning device with a supporting frame fixed to the machine base frame of a spinning machine. The support frame has a support disk bearing arrangement, an axial bearing and a rotor housing which can be closed by a pivotably mounted cover element.
In the cover element, a so-called channel plate, a fiber sliver feed cylinder, an opening roller and a one-piece fiber guide channel are arranged.

As usual, the opening roller is driven by a Tangential belt, while the sliver feed cylinder over one Worm gear with a machine-long drive shaft connected is.

When the rotor housing is closed, it protrudes from the duct plate arranged, so-called duct plate adapter, which next to a Thread take-off nozzle also has the mouth of the fiber guide channel, in the spinning rotor in, so that from the fiber channel opening emerging individual fibers directly to the neighboring arranged fiber slide surface of the spinning rotor are fed.

As certain in the manufacture of high quality open-end yarns Conditions regarding the mutual arrangement of the Spinning elements, for example their distance and / or their Dimensioning, must be fulfilled, result from the pivotable arrangement of the cover element relatively early limits, as for the minimum diameter of the spinning rotor that can be used.

That is, even with an arrangement of the pivot axis of the Cover element almost vertically below the rotor opening, such as this is described in DE 43 23 213 A1, and thereby achievable relatively flat pivoting curve, is with the known spinning devices use very small Spinning rotors, for example with a diameter <28 mm, very much problematic.

Attempts have therefore already been made in the past to construct open-end spinning devices in which the rotor housing is not supported by a swivel Cover element is closable, but a cover element owns that to a via a linear guide stationary part of the open-end spinning devices connected is.

DE-OS 23 27 347 and DE-OS 23 27 348 show and describe rotor spinning device with such Linear guide.

As can be seen in particular from the drawings FIGS. 1 and 2 of these patent applications, these open-end spinning devices each have a stationary bearing housing for receiving a spinning rotor rotating in a rotor housing and a cover element which is connected to the stationary bearing housing so as to be displaceable via a linear guide.
As is known, a fiber ribbon feed cylinder and an opening roller are also arranged within the cover element.

The drive of the opening roller and sliver feed cylinder takes place through central, machine length Drive devices that are stationary in the area of the stationary Spinning rotor bearing housing are arranged.

Since, in the interest of equal thread numbers, in particular the Sliver feed cylinder must be driven without slippage, designed in the known open-end spinning devices Transmission of the drive energy from the machine-long, stationary drive devices on which can be moved stored lid element arranged sliver feed and Dissolution devices overall quite complicated and expensive.

The open-end spinning devices described above were able to their overall relatively failure-prone structure is not convincing and therefore have not found their way into practice.

Furthermore, open-end spinning devices are known, in which one each within the pivotably mounted cover element single-motor-driven sliver opening roller and / or a single-motor driven sliver feed cylinder are arranged.

An open-end spinning device designed in this way is described for example in DE 43 09 947 A1.

A disadvantage of the spinning device according to DE 43 09 947 A1, however, is that the cover element is connected to the spinning rotor bearing housing via a pivot axis which is relatively difficult to access, which, as explained above, has both a clear limitation with regard to the minimum rotor diameter and difficulties for example, possible repairs to these individual drives.
That is, in these known spinning devices, the sliver opening unit integrated in the cover element with the sliver opening roller driven by the single motor and the sliver feeding cylinder driven by the single motor is also relatively difficult to remove.

The present invention is based on the aforementioned prior art based on the task of productivity of rotor spinning machines by increasing the spinning rotor speeds and thereby also to ensure that the spinning devices in If necessary, they are easily accessible and easy to repair.

According to the invention, this object is achieved by a device as described in claim 1.

Advantageous embodiments of the invention are the subject of Dependent claims.

The use of a linear guide for mounting the fiber sliver opening unit has, as already explained above, the advantage that, if necessary, very small spinning rotors can also be used.
This means that the use of extremely small spinning rotors enables a considerable increase in the spinning rotor speeds, while at the same time ensuring that the boundary conditions required for the production of a high-quality open-end yarn, for example with regard to the positioning of the channel plate adapter of the cover element, can be met exactly ,
The use of a stepper motor to drive the sliver feed cylinder in connection with the single-motor driven sliver opening roller ensures in a simple and inexpensive way that a uniform single fiber feed into the spinning rotor takes place and thus an exact yarn number is guaranteed at all times of the spinning process.
The easily detachable connection of the sliver opening unit to the connection console of the linear guide also ensures that not only all components, e.g. the spinning rotor, remain easily accessible, but that the entire sliver opening unit can also be easily replaced if necessary, so that e.g. whose individual drives can be checked and, if necessary, repaired in a special workshop.

This means that the design of an open-end spinning device according to the invention not only leads to a noticeable improvement in the productivity of such textile machines, but is also characterized by being easy to repair.
Furthermore, essential spinning components can be exchanged quickly and safely, for example when changing lots.

As stated in claim 2, is in a first Embodiment provided that the sliver-dissolving unit over a swivel axis with the connection bracket of the linear guide connected and secured by a locking device.

This means that the fiber sliver opening unit can be easily tilted about the pivot axis after releasing the locking device, so that, for example, access to the spinning rotor is largely released.
Since the swivel axis is fixed in the storage slots of the connection console which are open towards the front, the sliver-dissolving unit can also be easily removed if necessary and, for example, exchanged for another sliver-dissolving unit.

The locking device consists, as described in claim 3, in an advantageous embodiment of a spring-loaded locking bolt, which is slidably mounted on the connection bracket of the linear guide, and a corresponding connection hole in the area of the sliver opening unit.
This means that during the spinning operation, the swiveled-in sliver opening unit is reliably secured on the one hand by the locking bolt engaged in the connection hole, on the other hand, by pulling back the locking bolt, which is preferably done manually, the locking device can easily be taken out of operation and the sliver opening unit can then be moved forward easily pivoted and removed if necessary.

In a further preferred embodiment, the sliver opening unit is connected to the connection bracket of the first linear guide described in claim 1 via a second, short linear guide.
That is, on the connection bracket of this first linear guide, as set out in claim 4, guide bolts are arranged which slide in corresponding guide bores of a connection body of the sliver opening unit.

As set out in claim 5, the guide bolts have in Area of their free end each have a locking groove, in which can enclose a corresponding locking means.

These locking means are preferably, as described in claim 6, designed as a manually actuable locking lever.
That is, in the installed state, two pivotably mounted locking levers (Claim 7), preferably acted upon by a spring element in the sense of "pivoting in", engage in the locking grooves of the guide bolts and thereby fix the sliver opening unit in a form-fitting manner on the connection bracket of the first linear guide.

As described in claim 1, both the sliver feed cylinder and the sliver opening roller are driven by a single motor.
That is to say, in a preferred embodiment, the sliver opening roller is driven, as set out in claim 8, via an individual electric motor drive, for example a direct current or alternating current motor.
This single drive is preferably designed as a compact external rotor.

As described in claim 9, in an advantageous embodiment, a coupling device is arranged in the area of the connection console of the first linear guide, which enables mechanical separation of the electrical and pneumatic supply lines leading to the fiber sliver opening unit.
This means that the individual drives arranged within the fiber sliver opening unit are connected via supply lines, easily separable if necessary, to an energy supply and control device arranged, for example, in the area of the stationary bearing device of the spinning rotor.

In a preferred embodiment, the coupling device consists, as set out in claim 10, of a coupling plate arranged on the connection bracket of the first linear guide, which corresponds in the operating position of the open-end spinning device with a correspondingly designed coupling element on the connection body of the sliver-dissolving unit.
This means that a coupling element arranged in the region of the fiber sliver dissolving unit is designed, for example, as a so-called “mother part”, the contact sockets of which are connected to the individual drives of the fiber sliver dissolving unit.
In the locked position, contact pins arranged on the coupling plate grip into these contact sockets and thereby form an electrically and pneumatically continuous closure.

For exact positioning of the sliver opening unit at all times to ensure, it is further provided that the connection console of the first linear guide on the back Has centering device. Preferably there is Centering device consists of two hardened dowel pins, which in the operating position in the corresponding centering holes Intervene stationary bearing block (Claim 11).

As stated in claim 12, at least one of the centering elements of the centering device functions as a key switch. This means that at least one of the dowel pins acts on an electrical switch in the operating position of the sliver opening unit in such a way that this switch is kept in the closed state and the supply line to the drives of the sliver opening unit is therefore live.
However, any relative movement between the sliver opening unit and the associated stationary pedestal immediately leads to the key switch being opened and the energy supply to the individual drives being cut off.
The key switch consequently ensures in a simple manner that the releasable coupling device which is switched on in the supply lines for the individual drives is always switched off or without pressure before each disconnection.

Further details of the invention are based on one below of the drawings shown embodiment can be removed.

Fig. 1

eine Offenend-Spinnvorrichtung während des Spinnbetriebes, mit einem stationären Spinnboxgehäuse und einer über eine Linearführung verschiebbar angeschlossenen Faserband-Auflöseeinheit, wobei an einer Anschlußkonsole dieser Linearführung eine Schwenkachse und eine Verriegelungeinrichtung angeordnet sind,

Fig. 2

die in Fig.1 dargestellte Offenend-Spinnvorrichtung in der Außer-Betrieb-Stellung, das heißt, mit einem Rotorgehäuse, das aufgrund einer linearen Verschiebung der Faserband-Auflöseeinheit geöffnet ist,

Fig. 3

die Offenend-Spinnvorrichtung gemäß Figur 2, wobei die Faserband-Auflöseeinheit um die Schwenkachse im Bereich der Anschlußkonsole abgeklappt ist,

Fig. 4

in perspektivischer Ansicht eine erste Ausführungsform der Anschlußkonsole der ersten Linearführung, mit einer Kupplungsplatte einer elektrisch/pneumatischen Kupplungseinrichtung,

Fig. 5

eine an der Anschlußkonsole angeordnete Zentriereinrichtung, die ein auf einen Schlüsselschalter wirkendes Zentrierelement aufweist,

Fig. 6

eine Offenend-Spinnvorrichtung gemäß Fig.1, mit einer zweiten Ausführungsform einer ersten Linearführung,

Fig. 7

einen Lagerbock zur Aufnahme der in Fig.6 dargestellten ersten Linearführung, gemäß Schnitt VII - VII der Fig.6,

Fig. 8

eine Offenend-Spinnvorrichtung mit einer Linearführung gemäß der Figuren 1-3, wobei im Bereich der Anschlußkonsole der Linearführungen eine zweite Linearführung zum lösbaren Anschließen der Faserband-Auflöseeinheit angeordnet ist,

Fig. 9

die Offenend-Spinnvorrichtung gemäß Fig.8, wobei die zweite Linearführung im getrennten Zustand dargestellt ist,

Fig. 10

eine perspektivische Ansicht auf die Anschlußkonsole der ersten Linearführung mit den Führungsbolzen der zweiten Linearführung sowie die im Bereich der zweiten Linearführung angeordete Kupplungseinrichtung,

Fig.11

einen Arretierungshebel für die zweite Linearführung im Detail.

It shows:

Fig. 1

an open-end spinning device during the spinning operation, with a stationary spinning box housing and a fiber sliver opening unit which is displaceably connected via a linear guide, a pivot axis and a locking device being arranged on a connection console of this linear guide,

Fig. 2

the open-end spinning device shown in Figure 1 in the inoperative position, that is, with a rotor housing that is open due to a linear displacement of the sliver-dissolving unit,

Fig. 3

3 the open-end spinning device according to FIG. 2, the fiber sliver opening unit being folded down about the pivot axis in the region of the connection console,

Fig. 4

a perspective view of a first embodiment of the connection bracket of the first linear guide, with a coupling plate of an electrical / pneumatic coupling device,

Fig. 5

a centering device arranged on the connection console and having a centering element acting on a key switch,

Fig. 6

2 shows an open-end spinning device according to FIG. 1, with a second embodiment of a first linear guide,

Fig. 7

a bearing block for receiving the first linear guide shown in Figure 6, according to section VII - VII of Figure 6,

Fig. 8

1 shows an open-end spinning device with a linear guide according to FIGS. 1-3, a second linear guide being arranged in the region of the connection console of the linear guides for releasably connecting the sliver opening unit,

Fig. 9

8 the open-end spinning device according to FIG. 8, the second linear guide being shown in the separated state,

Fig. 10

2 shows a perspective view of the connection bracket of the first linear guide with the guide bolts of the second linear guide and the coupling device arranged in the area of the second linear guide,

Figure 11

a locking lever for the second linear guide in detail.

FIG. 1 shows the open-end spinning device according to the invention, generally designated by the reference number 1, in its operating position, that is to say in the closed state.
In the exemplary embodiment shown, the open-end spinning device 1 has a stationary spinning box housing 2 and a sliver opening unit 4 connected to the spinning box housing 2 so as to be displaceable via a linear guide 3.

A bearing device 5 is arranged inside the spinning box housing 2 and accommodates, for example, an individual drive 6 for a spinning rotor 7.
As usual, the spinning cup of the spinning rotor 7 rotates in a rotor housing 8, which is connected to a vacuum source 10 via a pneumatic line 9 and can be closed by a seal 24 embedded in a cover element 23 of the sliver opening unit 4.

As indicated, is also inside the spin box housing 2 a spinning station own energy supply and Control device 25 arranged.

The sliver opening unit 4 has, as usual, a opening roller housing 11 in which an opening roller 12 driven by a single motor rotates.
Furthermore, the sliver opening unit 4 has a sliver draw-in cylinder 14 which is driven by a stepper motor 15.
As is known, the opening roller 12, which in the present exemplary embodiment is driven, for example, by a direct-current motor 13 designed as an external rotor, breaks down a sliver 18, which is presented via a sliver compressor 16, into individual fibers (not shown).
This means that the fiber sliver 18 inserted into the opening roller housing 11 between a feed trough 17 of the fiber sliver compactor 18 and the fiber sliver feed cylinder 14 is broken down into individual fibers, which are then pneumatically separated via a fiber guiding channel 19 which opens into a so-called channel plate adapter 20 which is inserted into the cover element 23 , are conveyed to the spinning rotor 7.
The individual fibers are fed via the mouth of the fiber guide channel 19 arranged in the channel plate adapter 20 directly onto an opposite, so-called fiber slide surface of the spinning rotor 7.

The resulting in the spinning rotor 7 during the spinning process Thread 21 is discharged via a thread take-off tube 22 and closed a cheese (not shown) wound.

As shown in Figure 1, that is pressurized Rotor housing 8 during the spinning operation by the Sliver opening unit 4 arranged cover element 23 or the one let into the cover element 23 Seal 24 closed. The sliver dissolving unit 4 is thereby on a connection bracket 30 of a first linear guide 3, swiveling and easily detachable if required, fixed.

The first linear guide 3 essentially consists of a stationary bearing block 26 which, for example via a Welded connection, is permanently attached to the spinning box housing 2.

According to embodiment z. B. of Figures 1 and 8, the bearing block 26 has guide bores 27 in which elongated guide members, for example two cylindrical guide rods 28, are slidably guided.
The guide rods 28 of this first linear guide 3 are connected at their rear end via a spacer 29, while they are fixedly mounted in a connection bracket 30 at their front end.

According to the embodiment of FIG. 1, the Connection console 30 via a locking device 31, Guide slots 32 for a on the sliver opening unit 4th arranged pivot axis 33 and via a coupling plate 44 an electrical / pneumatic coupling device 34, which later for example, will be explained in more detail with reference to FIG.

The open-end spinning device 1 preferably also has a pneumatic dirt disposal device 40.
In the operating position of the open-end spinning device 1 indicated in FIG. 1 or FIG. 8, the dirt holding funnel 39 of this dirt disposal device 40 is positioned exactly under the dirt outlet opening of the fiber ribbon dissolving unit 4.
The dirt disposal device 40 either has its own vacuum source 41, as indicated in the figures, or the dirt disposal device 40 is connected directly to the vacuum system of the open-end spinning devices 1, that is to say to the vacuum source 10.

FIG. 2 shows the open-end spinning device 1 described above in a position in which the sliver opening unit 4 over the first linear guide 3 horizontally in a rearward position moved, that is, the rotor housing of the open-end spinning device is open.

That is, the cover element 23 or the seal 24 on the sliver opening unit 4 have the front open Rotor housing 8 released so that the spinning rotor 7 already is relatively accessible.

In the position shown in FIG. 2, the centering device 46, which is shown in more detail in FIG.
This means that the centering bolts 55 of the centering device 46, which are generally hardened, have left their associated centering holes 56. At least one of these centering bolts 55 has released a plunger 57 of a key switch 47 which is acted upon by a spring element 58 and thus ensured that the energy supply to the individual drives 13, 15 in the sliver opening unit 4 was interrupted.

As indicated above, is shown in FIG Position the sliver opening unit 4 over the pivot axis 33 and the locking device 31 still firmly with the Connection console 30 of the first linear guide 3 locked while the power supply through the key switch 47 already is switched off.

By releasing the locking device 31, that is to say after the manually operated locking bolt 42 has been withdrawn from the connection bore 43 in the sliver opening unit 4, the sliver opening unit 4 can, as indicated in FIG. 3, be tilted about the pivot axis 33 and, if necessary, by the bearing columns 32 which are open towards the front can be removed without problems.
During this tilting process, the currentless and pressure-free electrical / pneumatic coupling device 34 is also separated.

That is, a coupling element 45 arranged on the sliver opening unit 4, the electrical component of which has, for example, spring-loaded contact pins, is pivoted back with the sliver opening unit 4 such that these contact pins lose their mechanical contact with the contacts 59 of the coupling plate 44.
During this swiveling back of the sliver opening unit 4, a pneumatic coupling 60 is also separated, which is connected to the pneumatic lines 35.

FIGS. 6 and 7 show a further possible embodiment of such a first linear guide 3.
Instead of cylindrical guide rods, a box-like hollow profile 52 is provided here.
The hollow profile 52 is slidably mounted in a recess 53 of a stationary pedestal 26 and preferably, as can be seen in particular from FIG. 7, has spaced sliding surfaces 61 on its outside. These sliding surfaces 61 are guided in a bearing bush 54 which is fixed in the recess 53 of the bearing block 26 and is made, for example, of brass.
That is, the one or two-part bearing bush 54 guides the hollow profile 52 over a large area, so that a stable guide device is provided.

A channel 62 arranged within the hollow profile 52 can thereby can be used to accommodate the supply lines 35, 36.

Figures 8, 9 and 10 show another preferred Embodiment of the invention.

As is known from the embodiment according to FIGS. 1-3, the detachably arranged sliver opening unit 4 is slidably connected to the stationary spinning box housing 2 via a first linear guide 3.
In the area of the connection bracket 30 of the first linear guide 3, however, a further, second linear guide 70 is arranged here, which essentially consists of relatively short guide bolts 63 fixed in the connection bracket 30 and guide bores 69 let into the connection body 71 of the sliver opening unit 4.

The guide bolts 63 have in the region of their free end each have a locking groove 66, in the installed state one of the on the connector body 71 of the sliver opening unit 4th arranged locking lever 64 engage.

The locking levers 64, which are shown in more detail in particular in FIGS. 10 and 11, are mounted in vertical guide slots 65 of the connecting body 71, so that they can be rotated to a limited extent about a pivot axis 68.
The locking levers 64 are also acted upon, for example by a spring element 67, so that they automatically snap into the locking grooves 66 on the guide bolts 63 in the installed state and thereby the fiber sliver opening unit 4 is secure, but easily detachable at any time, at the connection console 30 the first linear guide 3.

Between the connection bracket 30 of the first linear guide 3 and the connector body 71 of the sliver dissolving unit 4 is also a coupling device 34 is arranged. This one Relative movement of the second linear guide 70 separable Coupling device 34 has, as for example in FIG. 10 indicated, a fixed on the connection console 30 Coupling plate 44 with contact plugs with the corresponding Contact socket on one of the connector body 71 of the sliver opening unit 4 arranged coupling element 45 correspond.

Claims (15)

Disposed 1. An open-end spinning device with a to the machine base frame of a textile machine, stationary Spinnboxgehäuse for mounting a revolving at a high speed in a unterdruckbeaufschlagbaren rotor housing spinning rotor, a connected via a linear guide to the Spinnboxgehäuse sliver opening unit and a cover element for closing the rotor housing,
characterized, that the sliver-dissolving unit (4), easily detachable if required, is connected to a connection bracket (30) of the linear guide (3) and that a disengagement roller (12) which can be driven by a single motor and a sliver feed cylinder (14) driven by a stepping motor (15) are arranged within the sliver opening unit (4). 2. Open-end spinning device according to claim 1, characterized in that the fiber sliver opening unit (4) via a pivot axis (33) which is mounted in guide slots (32) of the connection bracket (30) which are open to the front, and a locking device (31) is pivotally movable on the connection bracket (30). 3. Open-end spinning device according to claim 2, characterized in that the locking device (31) from a displaceably mounted on the connection bracket (30), spring-loaded locking bolt (42) and a connection bore (43) arranged in the connection body of the sliver opening unit (4). consists. 4. Open-end spinning device according to claim 1, characterized in that a second linear guide (70) is connected to the connection bracket (30), with guide bolts (63), which in the installed state with corresponding guide bores (69) in the connection body (71) of the sliver -Dissolving unit (4) correspond. 5. Open-end spinning device according to claim 4, characterized in that at least one of the guide bolts (63) has a locking groove (66). 6. Open-end spinning device according to claim 4, characterized in that vertical guide slots (65) are arranged in the region of the guide bores (69) in the connecting body (71) of the fiber sliver opening unit (4), in each of which a manually actuated locking lever (64) is arranged. 7. Open-end spinning device according to claim 6, characterized in that the locking lever (64) are acted upon by a spring element (67) in the sense of "latching". 8. Open-end spinning device according to one of the preceding claims, characterized in that an electric motor designed as an external rotor (13) is used as the drive for the opening roller (12). 9. Open-end spinning device according to one of the preceding claims, characterized in that in the area of the connection bracket (30) in the supply lines (35, 36; 37, 38) switched on coupling device (34) is arranged. 10. Open-end spinning device according to claim 9, characterized in that the coupling device (34) from a on the connection bracket (30) arranged coupling plate (44) and a on the connecting body (71) of the sliver-dissolving unit (4) arranged corresponding coupling element (45 ) consists. 11. Open-end spinning device according to one of the preceding claims, characterized in that a centering device (46) is arranged between the connection bracket (30) and a bearing block (26) arranged in the region of the spinning rotor bearing device (5). 12. Open-end spinning device according to claim 11, characterized in that the centering device (46) has at least one centering element designed as a key switch (47). 13. Open-end spinning device according to one of the preceding claims, characterized in that a stationary dirt holding funnel (39) of a pneumatic dirt disposal device (40) is arranged at a distance below the sliver-dissolving unit (4). 13. Open-end spinning device according to claim 1, characterized in that the spinning rotor (7) can be acted upon by means of a single-motor electric drive (6). 15. Open-end spinning device according to claim 1, characterized in that the axis (48) of the opening roller (12) and the axis (49) of the sliver feed cylinder (14) are arranged orthogonally to the axis (50) of the spinning rotor (7).

Images