DE2631791A1 - ALONG AT LEAST A SPINNING MACHINE, IN PARTICULAR AN OPEN-END SPINNING MACHINE, MOVABLE MAINTENANCE DEVICE - Google Patents

Description

PATENT Attorneys ο e O -t η Q 1

DR.- I NG. H. H. WILH ELM - D I P L. - I N G. H. D A U ST E R

D-7000 STUTTGARTI - G VMN ASIUMSTRASSE 31B - TELEPHONE (07 11) 29 1133

Stuttgart, July 14, 1976 D 5105

Applicant: Fritz Stahlecker

Josef-Neidhart-Str. 18th

734-1 Bad Ueberkingen

and . Hans Stahlecker

Haldenstrasse 20

7334- cuties

Along at least one spinning machine, in particular an open-end spinning machine, movable maintenance device

The invention relates to a spinning machine along at least one, in particular an open-end spinning machine movable one-part or multi-part maintenance device with means for carrying out a cleaning and a piecing process on a spinning unit and with a traversing device is equipped for the marriage to stop at that

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the spinning unit to be maintained and the execution of the maintenance work determining program control is provided, which via a switching device to means for detecting a fault a spinning unit or can be connected to a stepping mechanism, in particular according to patent .......... (patent application P 25 46 Λ36.2).

The proposal of the main patent then aims at that of the the same maintenance device, both operational malfunctions, for example a thread breakage, can be eliminated, as well as preventive Maintenance work is carried out, which may prevent a malfunction. Especially with open-end spinning machines Such a procedure is advantageous because it is known that the quality of the thread produced is dependent on decreases in a predictable time without then already having a Thread break occurs. These reductions in quality lead to irregularities, particularly those affecting further processing make the spun thread difficult or impossible. Preventive maintenance of the spinning units, especially cleaning especially of the spinning rotor, leads to an improvement the spinning quality.

Der.Erfindung is based on the task of designing a maintenance device of the type mentioned at the outset so that, if possible constant UmI on times s for the maintenance device can be obtained, so that the time intervals in which the maintenance device passes the individual spinning units, are as small and constant as possible. This is to ensure that with reasonable preventive maintenance of the spinning units a monitoring in sufficiently short time intervals of the individual spinning units is carried out so that the Production quantity is not impaired, as a malfunction can then be quickly identified and rectified.

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To solve the problem is one for the Umsehalteinrichtung Control circuit provided, the one after covering a Defined path on the stepping device switching device and after a defined period of time the means for detecting a malfunction of a spinning unit includes a switching timing device.

This training ensures that a certain time segment is determined, which results from a monitoring trip composed of a certain duration and a period of time necessary for preventive waiting, the period of time for its preventive activities depending on that for the surveillance drive required time is increased or decreased. This means that if there are many malfunctions occur, only a small proportion of preventive maintenance is carried out, while conversely, with a small number of operational disruptions, there is a greater proportion of preventive maintenance.

In an advantageous embodiment of the invention, a changeover switch is connected to a changeover switch which is connected to a time-dependent switching impulses emitting timing element and an opposing switching impulses emitting, the number of overflowed spinning units detecting counter is connected. In this embodiment, the control circuit decides the switching device automatically before the start of a preventive maintenance process, how much time you for preventive waiting is available, after which the next surveillance trip must be started. The one for a total circulation The time span required can be kept almost constant, so that the time intervals in which the maintenance device .passes the individual spinning units.

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In another embodiment of the invention it is provided that one of its comparison device is applied to the changeover switch Attacks controlled actuator, which is connected to a timepiece, which is one of a specific Away or for driving past a certain number of spinning units required period of time emits dependent signal. In this configuration, the one for a monitoring trip The time required is compared with an average value, according to which the duration of the preventive maintenance depends on it is established so that constant circulation times can also be obtained here in the mean value.

In an advantageous embodiment of the invention it is provided that the switching period of the time measuring device or the Timer is adjustable. This opens up the possibility of the maintenance device dn to adapt the values that result from a changed situation ^ for example, if an additional open-end chip machine is in the maintenance unit is included or if an adaptation to other pasermaterials to be processed on the spinning machines should be made.

In a further embodiment of the invention, a is the degree of filling The DJfcektor is provided to detect the bobbins generated by the spinning units and to trigger the stepping mechanism or preventing the traversing device from stopping is. This ensures that there is no preventive Waiting at a spinning unit is carried out, after a bobbin change with a related one shortly beforehand Maintenance of the spinning unit has been carried out. It is also possible to exclude preventive maintenance if when the bobbin has received almost its full filling, so that a bobbin change must be carried out, which then also with is connected to a maintenance process.

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In a further embodiment of the invention, a detector is provided that checks the period of time since a previous maintenance, which is connected to the stepping mechanism and, if the period of time is too short, a stop at the spinning unit concerned prevented. This ensures that a malfunction does not occur within a short time caused maintenance work on the same spinning unit a preventive maintenance work is carried out.

In a further embodiment of the invention, a is the number of Maintenance of the individual spinning units registering memory provided. This makes it possible to obtain information about the To maintain quality or susceptibility to failure of the individual spinning units. It has been found in practice that the majority of malfunction-related maintenance cases, which can amount to up to 90%, on very specific spinning units occurs again and again, which are in the range of 20% of the existing spinning aggre gate. This makes it possible to determine these spinning units in question and, if necessary, to change them so that the number of malfunctions is reduced will. "

Further features and advantages of the invention emerge from the following description of the illustrated in the drawings Embodiments and the subclaims.

Fig. 1 shows a schematic representation of a cross section of an open-end spinning machine with a Part of a mobile maintenance device,

Fig. 2 is a section through the open-end spinning machine of Fig. 1 with a further part of the maintenance device,

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3 shows a plan view of a maintenance unit summarized Grujäpe of open d-spinning machines with a two-part maintenance device,

4 shows a block diagram for a control of an inventive Maintenance device,

Fig. 5 is part of a block diagram similar to Fig. 4- for another embodiment and

6 shows a cross-section through an open-end spinning machine with part of a maintenance device ₉ which takes on an additional function.

Those in fig _; 1 and 2 open-end spinning machine, shown only very schematically, consists of a plurality of juxtaposed open-end spinning units 1. In the embodiment shown, the spinning units 1 each have a housing part 2, in which a spinning rotor 3, indicated by dashed lines in FIG. 1, is housed. The necessary supply and dissolving means are accommodated in a housing part 5 which can be pivoted about an axis 4. A sliver 7 removed from a can 6 is fed to the feeding and opening device accommodated in the housing part 5, in which it is broken up into individual fibers and transported to the spinning rotor 3. In the spinning rotor 3, the fiber material is tied into a thread 8, which is drawn off from the take-off rollers 9 and wound onto a bobbin 11 with the aid of a winding roller 30. The presence of a thread is monitored by a thread monitor 12. As can also be seen from Fig. 1, the housing part 5 can be pivoted about its axis 4 in such a way that the spinning rotor 3 is accessible for cleaning. The open-end spinning machine is assigned a movable maintenance device, which in the example shown consists of two movable together or independently

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. Devices 13 and 14 are formed, each for itself are ready for use and carry out an operation. The part-

. Device 1J, for example, cleans the open-end spinning unit and, in particular, the spinning rotor 3. For this purpose, this device 13 is equipped with various functional elements, which ^{are indicated by the arrows I 1} I, F2 and F3. The functional element F1 interrupts the sliver feed, for example by activating the thread monitor sensor 12, the functional element F3 then swivels the housing part 5 and the functional element F2 then cleans the spinning rotor 3.

It goes without saying that further additional functional elements can be provided, in particular functional elements that clean an opening roller (not shown) or perform a dirt extraction ο "the like". The healing device 14 then contains, for example, functional elements that carry out the actual piecing process after cleaning. For this purpose, it is equipped with a functional element F 4, which lifts the bobbin 11 from the winding roller 10 for the piecing process, seeks the bathing end and then unwinds it against the normal winding direction. The yarn end is then appropriately processed within the device 14 and a functional element F5 opposite to the normal withdrawal direction in the Spinnrot or- ⁵ is returned, there attached to a laid fibrous ring and pulled off again. Further functional elements are expediently provided, for example the functional element F6, which controls the fiber sliver feed during piecing.

The sub-devices 13 and 14 are provided with detectors 15 which Can pick up signals from signal transmitters, not shown, which are each assigned to a spinning unit 1 and its Show the need for maintenance. The signaling will

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appropriately controlled by the thread monitor 12, the "when present a thread break.es interrupts the feeding of the sliver 7 and then triggers a corresponding signal »The detectors 15 and the associated signal transmitters can mechanically, work optically, acoustically or electrically. Sound the detectors 15 is then in need of maintenance upon receipt of a signal Spinning unit 1 triggered the program with which the stopping and aligning of the device 13 or 14 and the subsequent course of the maintenance operations are controlled. Through the The maintenance procedures described are also recorded in the cases in which the individual spinning units are equipped with devices who carry out a control of the spun thread and which stop the spinning unit 1 as soon as the thread does not more «in the prescribed quality.

Such devices for monitoring the thread quality are quite expensive and complex. On the other hand, it has been in practice shown that the deterioration in yarn quality only after occurs over a certain period of operation, so that this quality assurance may be counteracted cleaning can be carried out after a certain operating time before a thread break occurs, for which the spinning unit 1 in question must be stopped and a piecing process must be carried out. TJm this way of working To enable this, which is referred to as preventive cleaning, the subdevices I3 and 14 · each have an indexing mechanism equipped, which is upstream of the program control and which is independent of the presence of a Thread breakage ensures that the subdevices 13 and 14-a Spinning unit 1 are delivered and there the maintenance work carry out. Then comes the functional element F1 of the part » rates 13 for use, with which artificially by interrupting the sliver feed a thread breakage is triggered. The subdevice 14-, which is behind the subdevice 13, then finds

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a spinning unit gate on which there is a thread breakage, It is irrelevant for this device whether this thread breakage is caused by a malfunction or artificially has been.

In Fig. 3, the arrangement is schematically in a plan view of three open-end spinning machines 16 are shown, which are assigned a common track 17 for the maintenance device which consists of the two subdevices 13 and 14. As has already been explained, the subdevice 13 carries out preparatory work, in particular the cleaning of the open-end spinning units 1, while the subdevice 14 immediately following carries out subsequent maintenance work, in particular the weaving of a thread. It is possible. To couple the two subdevices 13 and 14 with one another, so that they can only proceed together or each with their own Equip chassis so that they can be delivered to different spinning units 1 at the same time and there independently perform maintenance work on each other.

At point A, for example, the maintenance device starts running on the open-end spinning machine 16 at the top in the drawing, and begins a monitoring trip during which maintenance work is only carried out if there is a malfunction on a spinning unit is present, so that a corresponding signal acts on the detector 15, which stops and executes which triggers maintenance work. After completing a complete cycle, when the maintenance device 13 »14 has reached point A again, a preventive waiting is started again, in which a certain number of open-end spinning units are serviced in the area between A and B regardless of the presence of a malfunction, until a switch to a new monitoring drive is made in point B. Be that way

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gradually all open-end spinning units from the roadway 1? Open-end spinning machines combined to form a maintenance unit 16 detected.

In practice, certain difficulties arise from that the number of times to be carried out to rectify malfunctions No maintenance work during a cycle constant and also not exactly predictable. This means that the maintenance device 13 »14 · for the individual revolutions different lengths of time are required. For example, it can happen that a group of open-end spinning units has bobbins filled practically at the same time, so that a bobbin change must then be carried out on these spinning units, which is expediently associated with maintenance will. A large number of malfunctions have been remedied to this Maintenance work still the intended preventive Maintenance work would follow up for a round trip required period of time quite large. This could lead to an interruption in the operation of one or more spinning units would remain undetected for a long time and by the maintenance device 13 »14- would not be remedied. this could lead to a significant loss of production. In order to avoid this risk, the aim is to ensure that the total cycle times, i.e. the monitoring drives and the preventive maintenance work within a certain period of time which is kept as constant as possible. It is provided that the preventive maintenance work then reduced, i.e. fewer spinning units as a preventive measure be waited if the surveillance drive takes a long time because a large number of malfunctions are eliminated had to, while in the opposite case a larger number of Spinning units is maintained preventively.

A first embodiment of a circuit for achieving constant UmI at times is in the block diagram of FIG. 4 *

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shown. The maintenance device 13 * 14- is with a program control 18 provided, which is connected on the one hand to the drives 19 of the functional elements F that perform the maintenance work, and on the other hand to the drive 20 of a Moving device. The program control 18 itself is either activated by a signal from the detector 15 from the individual Spinning units receives signals 21, or from a stepping mechanism 22 started. The switchover to the maintenance type takes place via a switchover device, which is an optional the detector 15 or the stepping mechanism 22 with the program steamer 18 connecting changeover switch 23 contains. The changeover switch 23 is expediently in the manner of a Flip-flop switching element formed switch 24 connected, to switch the signals of a timing element 25 or a counter 26 are supplied. The timer 25 is designed so that it is after a certain period of time Signal to the switch 24 emits, while the counter 26 after Vbreilaufen at a certain number of open-end spinning units also sends a signal to the switch 24. The timing element 25, which establishes the connection to the detector I5, and the counter 26, which connects the program control 18 with the stepping mechanism, are thus one on top of the other coordinated so that there are constant cycle times for a monitoring trip and preventive maintenance.

For example, the counter 26 is designed so that it emits a Sfahaltimpuls when the maintenance device 13, 14 has made a complete revolution, ie. for example from point A to point A of Fig. 3. This means that then the maintenance device 13 »14- when the point is reached A is switched to the stepping mechanism 22 after a first cycle, so that a preventive waiting is carried out is, The timer 25 is designed so that a switching signal is emitted from it after a period of time that a Average value based on experience

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for the circulation from A to A a scheme to be carried out anyway Maintenance work caused by malfunctions and including that for preventive maintenance of the area A to B required time is formed «This means that theoretically switching the maintenance device to the Detector 15 takes place when point B has been reached Faults occurred than expected, so In this case, a long preventive wait is carried out, i.e. spinning units are still being warmed. tet that go beyond the range A to B. In the event that a large number of malfunctions conditional maintenance work had to be carried out, the timer 25 will emit its switchover signal before the maintenance device 13 »14 has reached point B. this means that then due to the increased time it takes for the Monitoring drive was required, the proportion of preventive maintenance work is reduced.

In this training, care must be taken that the design of the timer 25 takes place so that the foam causing the foam Period of time is placed so that this switching pulse does not occur before a complete cycle, as in this In the event that the changeover switch 24 would not be switched after it was switched by the pulse from the counter 26 will. This could also be ruled out, for example, by the fact that the number of operating faults required maintenance cases is recorded in a memory 27, ' which is acted upon by the signals from the detector 15. This memory 27 can then send a signal to the counter 26 submit that when the time for the interpretation of the time is reached 25 the relevant number of malfunctions, the counter value signal is suppressed. This would have the consequence that after a complete cycle no preventive waiting is carried out, but rather a new monitoring

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drive is started. In this case, it would be useful if the timer 25 and the counter 26 also "for each multiple emit a switching signal of the value set on them. Appropriately, both the timing element 25 and the counter 26 is connected to the changeover switch 24 in such a way that by switching over the changeover switch 24, both the timer 25 and the counter 26 is started.

In the embodiment of Fig. 5, a modified one is used Control circuit for the changeover switch 23 is provided, which controls the detector 15 or the stepping mechanism 22 with the program control 18 of the maintenance device 13, 14 connects. An actuator 28 is connected to the switch 23, controlled by an electronic comparison device 29 will. Signals from a timing unit 30 are fed to the electronic comparison device 29. The timepiece 30 measures the time required for the last preventive maintenance section and the subsequent type of monitoring became. A signal dependent on this time is fed to the electronic comparison device 29, which this signal with an average time span stored in it compares the corresponding value. Depending on the result of the comparison, the electronic one determines Comparison 29 by signaling the actuator 28 whether and for how long preventive maintenance by switching is performed on the stepping mechanism 22. Has it turned out that the monitoring run is longer than in Has taken to average, the preventive maintenance will be shortened accordingly. Has been shown against it the surveillance drive was completed faster than expected, as fewer operational disruptions had occurred than average was to be expected, so the preventive one accordingly Maintenance extended to several spinning units, the signal with which the electronic comparison device the actuator 28 is operated so that the changeover switch

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23 is reconnected to the detector 15, is expedient The start signal is transmitted to the timer 30 as a start signal.

In order to give the time measuring mechanism 30 the possibility of recording the period of time required for a cycle _? a counter or odometer is expediently also provided in this embodiment, which emits appropriate signals to the time measuring mechanism 30 when a certain distance has been covered.

It is of course possible, in the embodiments according to FIGS. 4 or 5, not to design the path sections and the time spans for a full cycle of the maintenance device 13 ₉ 14 around the entire maintenance unit, but to undertake other subdivisions.

In practice, it makes sense to ensure that a spinning unit _s on which maintenance sarb ext was carried out shortly before to rectify a malfunction is not carried out during the next cycle, since this is generally not carried out is necessary and could only affect profitability. Similarly, it makes little sense to carry out preventive maintenance work if it is foreseeable that a malfunction and in particular a bobbin change will occur on a spinning unit, which will also make maintenance work necessary. It is therefore sensible if a signal transmitter on the spinning units and a detector of the maintenance device detect whether an operational maintenance work has been carried out shortly before and / or an operational maintenance work will shortly be required.

The case that is caused by a bobbin change can, for example with the aid of the configuration according to FIG. 6

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can be detected. Depending on the filling level of the bobbin 11, the bobbin holder 53, which holds the bobbin and is pivotable about an axis 52, assumes different angular positions The detector can be designed in such a way that it can only detect the signal transmitter 54 when it is moving in a central area, ie the coil 11 has a Mn de st filling, or does not yet have one maximum filling is also filled. In the illustrated embodiment, this means that the signal transmitter _s 54- to and- between the boundaries 57 57s. of the detector 56 must be located in order to be detected. Deis detector 56 can, for example, be directly connected to the stepping mechanism 22, as indicated by dashed lines in FIG. Ej? is then attached in such a way that, in the absence of a signal from the detector 56, the stepping mechanism 22 sends such a signal to the program control 18 that the traversing device on the spinning unit in question is not stopped.

In a similar way it can also be detected that at a Spinning unit maintenance work was carried out, not by changing the bobbin but by another Malfunction was caused. For example, the signal transmitter 54 can be used as a lamp or the like. be trained that switched off when performing operational maintenance work and which is provided with a timer that only allows it to be switched on again after a certain operating time has elapsed. Of course it can also be used for capturing this condition a separate detector with a separate signal generator can be provided.

In practice, it should be noted that the malfunctions do not distribute evenly over all spinning units,

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-ab -from very "certain, for whatever reason somewhat unfavorable formed spinning units are caused. To determine these spinning units, it can be provided that the number of operating faults of the individual spinning units is determined detector 15 is connected "while a switch 31 is in the connection line to the memory 27 zweäckmäßigerweise. fitted, which is betätijkigt with from the changeover switch 24 · in such a manner _s that only a connection between the detector and the memory 27 exists when the -Detector also forwards its signals to the program control 18 "The preventive maintenance operations are then not registered by the memory 27" are assigned to the spinning units recorded by the counter. It is then possible to use the To query the data contained in the memory 27 and, for example, eject it with the aid of a printer 32 or another display device *. It can also be provided that the memory can operate a display device via an actuator, which is attached to each spinning unit «·

A simple way to reduce the susceptibility of a spinning unit to failure to make recognizable is shown in Fig. 6, which works without the use of a memory. To the Spinning unit 1 is attached to an adjusting disk 58, which is divided into specially marked sectors 62. the Adjusting disk is loaded clockwise with a torsion spring, not shown, and against the movement with a Locking pawl 60 secured, which can be disengaged via a handle 61 if necessary. The movable maintenance device 13, 14- is provided with a tooth 59 of the adjusting wheel 59 associated drive wheel 63, which can be pivoted about an axis 65 on a pivot arm 64. Of the Drive of the swivel arm 64 and the drive of the wheel 63 can

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be controlled in a manner not shown by the program controller 18 when the with the signals of the step switch 22 differentiating signals of the detector 15 is applied. In the event of any malfunction-related maintenance, the setting wheel 58 is then turned over, for example turned one tooth further, so that later without further ado shows how many malfunction-related maintenance processes are occurred in the spinning unit. It is also possible to arrange an actuator 66 in the area of the axis 65, which is shown in FIG is controlled by the memory 27 in the manner already described.

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Claims (10)

Patent and protection claims 1. Along at least a spinning machine, in particular _s' a. For which the content-determining program control is open-end movable single or multi-part maintenance device, which is equipped with means for performing a cleaning and a piecing to a spinning unit, and with a Yerfahreinrichtung to the serviceable spinning unit and executing maintenance "provided that Can be connected via a switching device to means for detecting a malfunction of a spinning unit or to an indexing mechanism _9, in particular according to Patent .-. · ... *. · ........ (Patent application P 25 46 436.2), characterized in that, that a control circuit is provided for the switching device, which switches a device (26, 24 and 28) to the stepping mechanism (22) after a specified distance has been covered and a device (26, 24 and 28) to switch over to the means (15) after a specified period of time for ■ grasp a malfunction of a spinning unit (1) switching Contains timing device (25; 30, 29). 2. Maintenance device according to claim 1, characterized in that a changeover switch (23) is connected to a changeover switch (24) is connected to a time-dependent Timing element (2§) giving switching impulses and emitting switching impulses in the opposite direction, the Number of overflowed spinning units (1) detecting counter (26) is connected. 3. Maintenance device according to claim 1, characterized in that that to the changeover switch (23) one of one 109883/0379 -19- ORiGlNAL! NSPEGTED 2831791 Comparing device (29) controlled actuator (28) acts, which is connected to a timing mechanism (30), the one of one for a certain path or for driving past a certain number of spinning units (1) emits signal dependent on the required period of time. 4. Maintenance device according to claim 2, characterized in that that as a device for detecting the preselected path and for switching to the stepping mechanism (22) a counter (26) which counts the spinning units when the gate is closed and which is used to switch back to its output value ^ is connected to the timer (25). 5. V / ar processing device according to claim 2 or 3 »characterized in that that the switching side span of the timing element (25) or the timing mechanism (30) is adjustable. 6. Maintenance device in particular according to one of claims 1 to 5i, characterized in that a degree of filling the bobbins (11) generated by the spinning units (1) Detector (56) is provided, which is connected to the step "switchgear (22) is connected to trigger or prevent the moving device from stopping. 7- maintenance device according to at least one of the claims 1 to 0, characterized in that a time span since a previous maintenance checking detector is provided, which is connected to the stepping mechanism (22) is to prevent stopping at the spinning unit in question if the period of time is too short. 8.9 Maintenance device according to at least one of claims 1 to 7 »characterized in that a number of Maintenance of the individual spinning units (1) registering memory (27) is provided. 709883/0379 -20- 9. Maintenance device according to claim 8, characterized in that the memory (27) with a counter (26) and
an actuator is connected to the one or more
Display devices are assigned «, 10. Maintenance device according to claim 9 »characterized in that a display device on the springs of the spinning unit (1) (58) is attached, which is connectable to the actuator. 109883/0379