DE2408546A1 - SPOOL SUPPORT POSITION MONITORING SWITCH-OFF DEVICE FOR FAST-STRINGING MACHINES - Google Patents

Description

Applicant:

VEB heavy mechanical engineering combine

"Ernst Thalmann" Magdeburg

3011 Magdeburg 11

Marienstrasse 20th

Disconnection device monitoring coil carrier position for high-speed stranding machines

The invention relates to a device that monitors the bobbin support position Hold-off device for high-speed stranding machines using photoelectric encoders and a signal acquisition system consisting of logic modules.

Retention devices for high-speed stranding machines are known in various designs. Most are used to power the fast stranding machine when one breaks Shut down wire, either the torn wire itself or a lever held by the wire the Control circuit for stopping the stranding machine closes.

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Another known embodiment provides the stranding machine shutdown even if impermissible vibrations due to imbalances at high speeds appear. This case occurs in particular if, for whatever reason, the coil carrier begins around the axis of rotation of the stranding machine rotor to rotate. A vibration-free scanner is used when a maximum permissible vibration amplitude is exceeded the machine switched off. In many cases this type of shutdown is sufficient. The disadvantage here is the susceptibility to failure resulting from the need to set the scanner very precisely and from the possible change in position of the rope machine rotor in addition results. If the bobbin support is blocked, this vibration switch-off is not sufficient off, d. H. the impulse to switch off comes too late, so that accidents with considerable damage to property have already occurred.

A further based on this finding breaking device provides that perpendicular to the longitudinal direction of the rotor on one side of the rotor a photodetector and on the opposite side directed toward the photoreceptor light source ^s is arranged o, that the light beam of the rotor above the spool edge of the not deflected coil carrier penetrates the coil supported. If the coil carrier z. B.

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through, an impermissible bearing friction from its Itformallage rotated, a spool flange reaches the area of the light barrier and interrupts the light beam. The photo receiver emits an impulse which is used to switch off and stop the machine will. This shutdown device has some crucial parts that still cause accidents occur as a result of rotating bobbin carriers. These cases always occur when the bobbin support blocked in a position, with aer an interruption of the light beam by the coil flanges cannot occur at all.

Another disadvantage is the fact that when the stranding rotor starts up, the normal, through the Hotor jacket caused beam interruption so long in time isü that the switch-off pulse would come immediately. It It is therefore necessary to have a shutdown lock for the start-up process to provide or to extend the pulse duration fundamentally. While the latter is practical Due to the associated risk of damage, the shutdown takes place too late or at all in an emergency not) is not acceptable, the switch-off lock leads to subjective malfunction, for example if the shut-off lock is not canceled and the shut-off device is practically inoperative.

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The purpose of the invention is to avoid accidents caused by revolving bobbins on high-speed stranding machines.

The invention is based on the object of a disconnection device for monitoring the coil carrier position To create high-speed stranding machines, their IvIeßwerVerstellung based on light barriers and photo receivers with subsequent measurement processing is provided in such a way that that regardless of the interruption time of the light barriers as well as in the case of a blocking bobbin support in one that is unfavorable for the light barrier interruption Position ensures that the high-speed stranding machine is switched off in good time.

According to the invention, the object is achieved by a light barrier system coupled with a signal linking system, which consists of two light sources of different types arranged outside of the stranding rotor for each coil carrier, the beams of which are directed through apertures form an angle to one another and, passing through the window opening of the stranding rotor, directly or reflected on the potentiometer are directed and this light barrier system via an OR gate and a bistable multivibrator .2 ¹ F ₃ with dynamic output either with a pulse generator influenced by the rotating stranding rotor and fed counter with downstream FFg and

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OR element is linked or the light barrier system is linked via UlD or OR elements with a counter combination with a downstream OR element and .B ¹ Ii ¹ C., with integrated trigger modules being connected in parallel for system monitoring.

The invention also includes the fact that incandescent lamps, fluorescent tubes and iialleiberlichi are used as light sources: sources, such as luminescence diodes, are provided, one light barrier of the respective coil carrier the "Set" signal is assigned and the "Reset" signal is assigned to the other light barrier.

Another feature of the invention is that the single counter or counters the counter combination have a predetermined storage capacity of η = 1 to η = k, where the Ck + · 1). Impulse causes the switch-off.

The new switch-off device for high-speed stranding machines guaranteed in the event of a change in position of the coil carrier beyond a specified Winkelbe contract a quick, safe shutdown of the high-speed stranding machine. The system's own monitoring of the Pulse generator is effective by means of delaying after death developing jigger modules (digital-to-analog converter with threshold characteristic), which are constantly both the additionally arranged pulse generators as well as the light barriers to their puncture capability wedge; check, a high level of operational reliability is achieved. At the exit

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management without additional pulse generators and when using a counter combination, in addition to monitoring the Light barriers still the counter combination by one Trigger module monitored in such a way that in the event of faults in one any information channel of the entire light chain and Signalverkn'pfungssysseme shut down the machine is, üie shutdown device works intrinsically safe. The fact that for the start-up and Stranding machine run-out no additional equipment are necessary, no matter how short the switching time is.

On the basis of the exemplary embodiments shown in the drawing the invention is to be explained in more detail. Show it:

Fig. 1: the schematic representation of the cut-off device with additional pulse generator,

Ig. 2: the switch-off device of the other embodiment without additional pulse generator,

Fig. 3: the Verseilroi; or with the light barrier arrangement in my eyes

4i the Verseilrobor in cross section with the light barriers for a bobbin.

409883/0283

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The shutdown device according to FIG. 1 consists of a pulse generator 1 of known design, the pulses of which are glued to a pulse shaper 2, and these shaped pulses pass through a further line to a counter 3 which has a storage capacity. Β. has η = 1 to η = k. ^{A J:} F 4 (bistable multivibrator with dynamic output, called a flip-flep) is electrically connected to the counter 3. The FF ^ 4 receives electrical signals via an OR gate 5 from the two light barriers 6 and 7, which "if the sequence is normally provided in FF- ^ 4 generates a reset signal by which the counter 3 is repeatedly set to iMull. Failed If the coil carrier is not in the intended position, a barrier signal fails, then the memory of the counter 3 detects the number η + 1, since at least η + 1 marks are attached to a rotor rotation of 180 °. This process triggers in one of the counter 3 downstream FFg _Q issues the stop command for the stranding machine via an OuSR element that is electrically connected to it. Among other things, so that the shutdown device can fulfill its function in the event of failure of the pulse generator 1, an trigger module connected to an OTD element 11 is parallel to the counter 3 12 (digital-to-analog converter with threshold value characteristic) is arranged, which triggers the stop command after a predetermined Zeic via the Ul \ iD element and the OubR element 9.

409883/0283

The same applies to the failure of the light barriers 6; or their light sources. These are monitored by the trigger module 12 ^f , which is also connected to the tßi'D element 11 and the OR element 9. In the other version according to Pig. 2, for example, four light barriers 6; 6 'and 7; 7 ¹ with three counters 13; 14; via the ÜBD members 16; 17 and the OR gate 18 linked so that the light barriers 6; 6 ¹ coming pulses are received as counting pulses in the counters 13 »14, while the pulses from the light barriers 7; 7 'as reset pulses for the counter 13; 14 take effect. The from the light barriers 7; 7 'pulses picked up in parallel before the UHD element 16 reach the ODiiR element 18, the output signal of which is effective as a counting pulse for this counter 15. The reset pulse for this counter is provided by the output signal that is sent in parallel to the light barriers 6; 6 ¹ connected tfwu element 17. All three counters 13; 14; 15 are connected on the output side to an OR gate 19, which in turn is connected on the output side to an S ¹ J ^1. , 20 which triggers the stop command when the normal pulse sequence is broken, ie when the storage capacity of one of the three counters is exceeded. So that in the event of failure of the entire - ^ icht barriers system, the shutdown device is not inoperable, a trigger module 21 is used between the output side of the OR element 18 and the input side of the OR element 19, which is used at

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Elimination of the counting pulses after a fixed time constant the stop command issued. When the machine starts up, triggered via start button 27, after reaching a predetermined speed of the trigger module 21 becomes effective again. Pure the light barrier system Various light sources, such as incandescent lamps, fluorescent tubes, luminescent diodes, etc., can be used find which modulates in the frequency range from 0 to η Hertz - with aperiodic or selective signal processing - can be operated / grounded.

In Pig. 3 and 4, the light sources 22 are z. B. on the one hand and the Potοempfanger 24 on the other Side of the "twisting rotor 23" is arranged. The light beams pass through the twisting rotor 23 through the window openings and are fastened to the coil support 10, mutually offset by suitable angles diaphragms 25; 26 limited.

In the pig. 4 becomes the different angular position the diaphragms 25; 26 shown to each other. But it is also possible to arrange within the stranding rotor 23 on the coil carrier 10 Heflectors that the light beams throw back on the Potoempfanger 24, which then on the same rotor side as the light sources 22 are arranged.

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Claims (1)

Pa ζ ent responses: 1. Spool carrier position monitoring shut-off device for high-speed stranding machines using photoelectric transducers and a signal acquisition system consisting of logic modules, characterized in that the light barrier system coupled to the signal acquisition system for each coil carrier consists of two light sources (22) of various types arranged outside the 7ereilrotors (23) Beams directed by diaphragms (25; 26) form an angle to one another and, going through the window openings of the stranding rotor (23), are directed directly or reflected onto the J? 'oto receiver (24) and this light barrier system via a U-Jütt member (5 ) and bistable multivibrator jj'i'jj (4) with dynamic output is linked either to a counter (3) fed by a pulse generator (1) influenced by the rotating stranding rotor with downstream Jf ¹ F ₃ (8) and OR element (9), or the light barrier system via an AND element (16) and an OR element (17; 18) with a Hählerko mbination (13; 14; 15) is linked to the downstream ODi ^ R element (19) and FF ₃ (20), with integrated trigger modules C12; 21) are connected in parallel. - 11 409883/0283 2a disconnection device for high-speed packing machines monitoring the bobbin carrier position, characterized in that incandescent lamps, fluorescent tubes and semiconductor light sources such as juininescence diodes are provided as light sources, which are used in constant or alternating light operation with aperiodic, selective or phase-sensitive signal processing, whereby the light barrier (6 ) or (6 ¹ ) of the respective coil carrier (10) is assigned the "Reset" signal. 3. Disconnection device monitoring coil carrier position for high-speed stranding machines according to claim 1, characterized in that the individual counter (3) or the individual counters (13; 14; 15) of the counter combination have a storage capacity of η = 1 to have η = k. 4. Shutdown device monitoring coil carrier position according to claim 1, characterized in that the overlap angles of the diaphragms (25; 26) with one another are larger than the opening angle of the stranding rotor window. - 12 - 409883/0283