DE3708114A1 - Device for recording operating states at work stations of a spinning machine - Google Patents

Abstract

The invention relates to a device for recording operating states at work stations of a spinning machine, especially thread breaks at spinning stations of a ring-spinning machine, which has, for each spinning station, a thread-break sensor, emitting a thread-break signal when a thread break is sensed, and at least one working member which can be loaded by the thread-break signal from the thread-break sensor. According to the invention, the thread-break sensor can also be loaded by an operating member and, when loaded by the operating member, emits at least one signal distinguishable from the thread-break signal. <IMAGE>

Description

The invention relates to a device for detection operating conditions at workplaces of a spinning machine, especially of broken threads at the spinning positions of a ring spinning machine, which has one per spinning position, when feeling egg thread break emitting a thread break signal sensor and has at least one working organ that is the break signal of the thread break sensor can be applied.

It is known spinning machines, for example ring spinning machines, with automatic match stop device equip, which with a in the thread running direction after Spout of the drafting device arranged sensors the presence feel the thread and if it is absent as a result of thread breaks the further by means of a fuse retention device Disconnect roving. Known match-stop device lines have an energy accumulator, for example a tensioned spring on which to turn on the Lun tenretaining device is triggered.

To fix a thread break, be it by hand through a Operator or automatically by an automatic thread attaching device, the effect of the match stop device must be be lifted so that the fuse can be used to attach the thread finished. This is done by moving the fuse back holding device in the starting position, the force memory is tightened again. Because when removing the thread  break does not yet exist, must still be safe be made that the match stop device during the Thread attachment does not take effect again.

On the other hand, after the operator's activity has ended goose for threading are caused that the match stops Establishment can take effect again, that is, itself is in the cocked position. Both if threading was successful, as well as when more Other attempts were unsuccessful or, for example, because of Missing the runner had to remain unsuccessful. In the former Fall must stop at the next thread break can take effect again. In the second case, it must - triggered by lack of thread - immediately effective tre to lower the feed of roving initiated break.

The operating element must therefore on the occasion of lifting the thread breaks several times to the match stop device signals and to be able to connect with it - one-way.

The object of the invention is for this communication between an operator to fix a thread break and the Match stop device an easy way to create fen.

This task is done with the features in the characterizing part of claim 1 solved. This achieves the advantage that not another, from the already existing transfer completely independent transmission system must be judged. The control element can be a Operator, for example the machine operator Act spinner. However, it is preferably provided that the Operating element a thread break automatically eliminating thread breaks setting tool of any known design and effect wise is.  

Various options are available in the subclaims Realization of the transmission of the thread break signal under separable communication signals specified.

A me assigned to the thread break sensor device Chinese or - if designed as a reed contact - magne table-actuated switching element can in particular by a Operator can be operated easily. In contrast, a Actuation of the sensor of the thread break sensor or one connected to the thread break sensor device, ge separated the need for mechanical power dung, which in particular with an automatic thread application setting device requires special devices, avoided such sensors electro-magnetic, optical, acoustic or can be acted upon in another way.

It is to be understood under the action in a distinguishable manner according to claim 2, that with the same - electro magnetic, optical, acoustic or in another way - exposure to a single sensor, the distinguishability of the signals can be achieved by different coding of further signals or when using several Sensors by using sensors that respond to different types of exposure. For example, in addition to an electro-magnetic yarn break sensor that responds to the rotation of the FE metallic spinning rotor, a sensor that responds to optical signals and can be acted upon by the operating element can be used. Other two or triple combinations of the aforementioned types of exposure can also be used.

When using separate switching elements or additional Senso ren can their signals according to a further subclaim via line separated from the line of the thread break sensor and are easily distinguished  bar. In order to reduce the required line work, can the signals in training according to the invention can also be managed via a common line, whereby to ensure this through appropriate coding is that the signals from the various sensors and / or. Switching elements remain distinguishable.

The coding can exist in different frequency of the signals, in a certain aperiodic pulse train or - with no more than two sensors or switching elements - in different polarity of the signals.

The signals emanating from the control element can do this ordered sensor already in coded form the. For example, an operator would have to do this carry the appropriate sensor. To avoid this is in these cases it is advantageous if a sensor or a Switching element a signal triggered by an application encoded by a subordinate encoder itself.

Depending on the type of coding used, the Selection device downstream of the sensor as frequency filter, as a decoder (with pulse coding) or as an electrical Ven tile (with polarity) trained.

Further training arise from the further subclaims chen.

The invention is described below with reference to the drawing illustrated embodiments described in more detail. In the drawing shows:

Fig. 1 is a schematic view of the device according to the invention in side view;

Figure 2 is a plan view of another embodiment in broken view; FIG.

Figure 3 shows a further view of an embodiment in side view in a schematic representation.

Fig. 4 shows a further possible embodiment of the scanning of the thread;

Fig. 5, 6 and 7 ways to forward the signals in cal matic representation;

Fig. 8 shows another embodiment in side view in a schematic representation.

Of FIG. 1 has an unspecified Ringspinnma machine a drawing frame 1 on, by which the yarn 2 is running and guided by a thread guide 3 via a ring 6 guided by a rotor 7 on a spindle 4 is wound. This spindle 4 sits on a spindle bench 8 of the ring spinning machine. The ring 6 with the rotor 7 is arranged on a ring bench 5 . It is understood that a spinning machine has a plurality of spinning stations of this type arranged side by side.

A draft-stop device 14 with an actuating element 15 is arranged upstream of the drafting device 1 . The Luntenstop-Vorrich device can be of any, known per se and therefore not described here in detail construction and mode of action.

Each spinning station also has a yarn break sensor 11 which, when a yarn break is sensed via lines 12 and 16 , sends a signal to the actuating element 15 , by means of which the roving stop device 14 is triggered and thereby the further supply of roving to the drafting device 1 is prevented.

It is assumed that the thread break sensor 11 contains a sensor which is known per se, in which a current of the frequency f ₁ (corresponding to the rotational frequency of the rotor) is generated by the revolution of the FE-metallic rotor 7 . This current is amplified in an amplifier 17 and fed to a relay 29 via a frequency filter 18 set to the rotor frequency. As long as the frequency f ₁ is present, the relay 29 remains open; if the frequency f ₁ does not occur as a result of thread breakage and the rotor 7 comes to a standstill, the relay closes a contact through which the actuating element 15 is acted on via the line 16 and triggers the sliver stop device 14 .

At spinning positions at which a thread is broken, a thread attachment device 9, which is patrolling the spinning machine, engages in the area of the broken thread of the spindle 4 with an attachment device. In this case, there is an interaction with the thread break sensor 11 , in which a transmitter 30 , which is arranged at the front end of an arm 10 pivoted in by the thread attachment device 9 according to arrow A and is brought by this pivoting movement in the immediate vicinity of the sensor arranged in thread break sensor 11 , the sensor in the thread break sensor 11 is applied.

Since the supply of roving to the drafting device 1 has to be resumed to correct a thread break, the transmitter 30 applies the thread break sensor 11 with a frequency f ₂ , which, amplified in the amplifier 17 , is fed via the filter 18 to the relay 29 '. This relay 29 'acts on the actuator 15 in the sense that the locking effect of the match stop device 14 is canceled.

Amplifier 27 , filter 18 and relay 29 , 29 'are arranged in a control unit 13 assigned to each spinning station. The output of the amplifier 17 of each control unit 13 of a machine can also be connected via a spur line 20 to a bus 21 , which leads to a central evaluation unit 22 .

The central evaluation unit 22 has frequency filters 24 , relays 31 , 32 , a two-stage display device 23 , a computing unit 25 and a registration device 26 .

The thread running signal (frequency f ₁ ) of the thread break sensor 11 thus reaches via the amplifier 17 , the lines 20 , 21 and the filter 24 also the relay 32 , which, like the relay 29 when the frequency f _{1 is} absent, indicates the presence of a thread break Stage of the display device 23 turns on. At the same time, the relay 32 transmits the thread break signal to the computing unit 25 , in which these signals are evaluated according to various aspects, for example accumulation over a predetermined time, comparison with a predetermined target value etc. and the result is displayed or printed out in the registration unit 26 can.

If the thread attachment device 9 cannot fix a thread break and stops its activity at a spinning position after, for example, three unsuccessful attachment attempts, it can announce this by emitting a frequency signal f ₃ . This signal is passed through the filter 18 to the relay 29 '', which triggers the match stop device 14 again and turns on via the relay 31 the second, the presence of a thread breaker 9 not fixable thread break indicating stage of the display device 23 . The signal can also be supplied to the computing unit 25 and the registration device 26 in a manner not shown in detail.

There is the possibility of providing further frequencies, for example f ₄ , via which further information can be transmitted from the thread application device to the control unit 13 or the central evaluation unit 22 via the existing transmission path.

The thread attachment device 9 has a frequency generator 28 . In addition to the frequency f ₁ generated by the revolving spider 7 in the sensor of the yarn break sensor 11 , which, depending on the spin speed between 100 Hz and 300 Hz, are shown for example three frequencies used for control purposes, namely

f ₂ - command "release match stop", for example in the range of 500 Hz,
f ₃ - message "thread break cannot be remedied", for example in the range of 800 Hz,
f ₄ - Message "Thread break fixed", for example in the range of 1100 Hz.

The signals f ₁ , f ₂ and f ₃ are given to the actuating element 15 and thus lead to an effective linkage of the activity of the thread application device 9 with the sliver stop device 14 . The signals f ₁ and f ₃ and possibly f ₄ are fed via line 21 to the frequency filter 24 of the central evaluation unit 22 . If, for example, the message f ₃ , that is to say "thread break cannot be remedied" is given, the guide 23 is activated, whereby an operator is called to the damage location. The registration unit 26 serves to detect the individual thread breaks accordingly.

The sensor 11 is a rotor sensor known per se, and the signal transmission according to the invention can take place via the signal line of the sensor already present. So that the central evaluation unit 22 can distinguish the thread break signals of the sensor and other information signals from the thread application device 9 , the latter signals can have an identifier, for example frequency, pulse train, polarity, by which they can be distinguished from the signals of the sensor 11 . Different identifiers can be provided for different statements.

In the central evaluation unit 22 , signals with such identifications may then trigger different counting and / or switching processes, even if they are received on the same line on which the thread break signals of the sensor 11 also arrive.

For the evaluation and reproduction of the signals transmitted to the central evaluation unit 22 , there is the possibility of a current display or a registration unit.

In the embodiment of Fig. 2, two sensors 11, and 11 '' provided in the yarn breakage sensor 11, the sensor 11 '' from the Fadenansetzgerät 9 f via its transmitter at the frequencies f ₂ and ₃ can be applied.

The sensor 11 'is designed as a normal rotor sensor and emits the rotor frequency f ₁ when the rotor 7 rotates. In a subordinate selection means 18 ', for example several frequency filters of different permeability, the frequencies are sorted and lines via separate lines, for example the relay 29 , 29 ', 29 '' supplied.

In the embodiment according to FIG. 3, a switching element 27 , for example in the form of a push button, can be integrated in the housing of the denbruch sensor 11 , which can be actuated by the operating element. Upon actuation of the switching member 27 is discharged via line 27 'a of the through line 27' 'discharged yarn breakage signal separate and distinguishable signal.

According to the invention, a thread break sensor is attached so that it can be acted upon mechanically or without contact not only by the thread 2 or by the rotor 7 , but also by the control element, for example the thread attachment device 9 or the operator.

The following status states are possible when using, for example, an inductive sensor for monitoring the rotor movement, in which the rotor 7 triggers a pulse each time it passes in front of the sensor:

• a) pulses with the frequency of the rotor revolution, that is, the thread 2 is running. The frequency of the pulses can be used to detect the speed of the rotor 7 .
• b) No signal, that is, thread breakage.
• c) Signals with a special identifier, that is, notification of the thread application device 9 to the sensor.

To deliver the latter signals to an inductive sensor, the thread attachment device 9 can have a magnetic head, which it brings through the attachment device 10 so close to the sensor of the thread break sensor 11 that the stray field of the magnetic head acts on the sensor. Transmitters of a different type are required to apply sensors of a different type, for example ultrasound or infrared.

In the embodiment according to FIG. 4, instead of the thread break sensor shown in FIG. 1, a probe arm 33 is provided, which is connected to a torsion spring 34 , touches the thread 2 with its front arm and 40 contacts with a rear arm to generate signals able to manufacture. This probe arm 33 can move in the direction I; this direction of movement occurs when the thread breaks, that is, when the thread 2 is not present. A further direct possibility of movement is given in the direction of arrow II, this direction of movement takes place when actuated by a control element.

In Fig. 5, 6 and 7, the coding possibilities are shown nä forth. According to FIG. 5, the coding is carried out via the polarity with positive and negative poles; According to FIG. 6, a signal is coded by an encoder 35; according to Fig. 7, both signals are encoded via encoder 35 and 36.

In the exemplary embodiment according to FIG. 8, which is similar to the exemplary embodiment according to FIG. 3, a further encoder 37 is used which interacts with the actuating member 27 .

Through the effective linking of the activity of Fa denansetzgerätes 9 with the match stop device 14 according to the invention ensures in a simple manner that the match stop device 14 does not come into action again during thread application. After the thread has been attached, the match-stop device 14 is then reactivated.

Claims (11)

1.Device for detecting operating conditions at Ar work stations of a spinning machine, in particular of thread breaks at spinning positions of a ring spinning machine, which has one thread break sensor emitting a signal when a thread break is felt and at least one working element which can be acted upon by the thread break signal of the thread break sensor, characterized in that the yarn break sensor is designed to be acted upon by an operating organ and emits at least one signal distinguishable from the yarn break signal when actuated by the operating member. 2. Apparatus according to claim 1, characterized in that a sensor of the yarn break sensor ( 11 ) by the operator gate ( 9 ) can be acted upon in at least one way, which can be distinguished from the action by a yarn break and thereby emits signals which are distinguishable from the yarn break signal ( Fig. 1 ). 3. Apparatus according to claim 1, characterized in that the thread break sensor ( 11 ) in addition to a sensor ( 11, ) for exposure to a thread break has at least one further sensor ( 11 '') by the control member ( 9 ) in a different way than can be beaten by a thread break ( Fig. 2). 4. The device according to claim 1, characterized in that the thread break sensor ( 11 ) has a switch member actuated by the operating element ( 27 ) ( Fig. 3). 5. Device according to one of the preceding claims, by in that the output (27) or a further sensor of a separate switching element signals over one of which the thread break signal-carrying line (27 '') separate line (27 ') are guided . 6. Device according to one of claims 2 to 4, characterized in that the signals emitted by a separate switching element or another sensor ( 11 '') from the yarn break signal of the yarn break sensor ( 11 ') are distinguishable and with this via a common Line ( 12 ) are discharged. 7. The device according to claim 6, characterized in that the sensors selection means ( 18 ), in particular in the form of filters, are connected via which the different signals under different signals can be conducted. 8. The device according to claim 6, characterized in that the control member ( 9 ) has an encoder ( 28 ) which is connected to a sensor acting on a sensor Sen sen. 9. The device according to claim 6, characterized in that the working member ( 22 ) is assigned a decoder ( 24 ). 10. The device according to claim 1, characterized in that over a the course of the thread ( 2 ) scanning, spring-loaded probe arm ( 33 ) from the thread break signal under separable signals can be generated ( Fig. 4). 11. The device according to claim 1, characterized in that the work organ has a ratchet stop device ( 14 , 15 ) for each work station and / or a central evaluation unit ( 22 ) which can have a guide ( 23 ) and / or a registration device ( 26 ) , includes.