DE1710202C - Method for monitoring the weft insertion with automatic shooters - Google Patents

Description

· Kreis delivers.

For a comprehensive monitoring of the weft insertion, it is necessary to use the various

The invention relates to a method for monitoring functions jointly on a web monitoring system the weft insertion with an automatic chair. With the help of separate sensing contactors, in the devices with the help of a scanning device, this leads to considerable in practice Input of an evaluation circuit electrical Im- borrowed difficulties and caused a large one pulse for generating control impulses at the outlay on equipment. The attachment input is in the scanning section of the evaluation circuit. supply of more than one z. B. electro-optical

When the weft thread is inserted by means of an automatic transceiver device on one side of the shuttle In particular, three surveillance radio chairs and their adjustment are problematic, abgetions exercise: The monitoring of the thread provision of the increased susceptibility to failure and the advice on the weft reel, the supervision of the cost of a multiplication of this most sensitive the weft thread running off the bobbin with regard to part of the monitoring system. Each of the evaluation fraction or the absence and monitoring of the 65 circles on the other hand would be separate from the appropriate ones Sagittarius Movement. To release points in time in order to

There are methods of the type mentioned for adapting the control to the work cycle of the every single one of these tasks is known. The loom serves to achieve this.

The invention is based on the technical problem of developing a method for monitoring the weft thread entry by means of a machine gunner who, with the help of a common scanning and evaluation device, can perform at least rvei monitoring functions, e.g. B. weft bobbin and weft thread monitoring, and allows a clear differentiation of the received monitoring signals at the output of the evaluation device. This object is achieved in that the input of the evaluation circuit temporally successive pulses which at least indicate the status of the weft yarn and of the quill, are supplied the associated over them, and during certain periods _b losed lines of the evaluation circuit the output will be supplied to the same.

Such a pulse sequence arises in the case of the periodic one Passing a slot on the Hmpfangteil the scanning device, with the signal information due to the occurrence or absence of pulses, which may have a certain shape (amplitude, Modulation) may have, is contained in it.

With reference to the drawings, examples of devices for carrying out the invention are shown Monitoring procedure explained. It shows

F i g. 1 the block diagram of a detailed example,

F i g. 2 the diagram of an arrangement of signal generating means in the machine gunner,

F i g. 3 shows the pulse diagram for the exemplary embodiment according to FIG. 4 and 5,

F i g. 4 the block diagram of the evaluation circuit A to P i g. 1 for monitoring the weft bobbin, the weft thread and cW presence of the shooter,

F i g. 5 an addition to the block diagram according to FIG. 4 for monitoring the shooter speed.

From Fig. 1, the connection of the most important elements of a monitoring system attached outside of the automatic contactor can be seen. The scheme contains two TK probes which are connected to an input of evaluation circuit A. A second input is connected to a clock generator KW , while lines lead to the actuators S and W at the output of the evaluation circuit. The actuator S is used to stop the loom, while the actuator W in looms with automatic bobbin change to initiate de? Spool change process can be provided. The clock generator KW derives a clock pulse K ₁ preferably from the drive of the loom, for example with the help of a contact that is actuated by a cam disk attached to the crankshaft, whose function in connection with the evaluation circuit according to FIG. 4 will be described in more detail. The clock pulse could, however, also from another part of the loom describing the working rhythm of the loom, e.g. B. the sley can be derived.

The derivation of impulses from the shooter can in a known manner on electro-optical! Be done away. A probe head TK is attached to both sides of the sley, which scans the machine shooter, on which reflective elements are arranged, when entering or exiting the shed. Reversing reflectors are particularly suitable as reflective elements. As guard elements LF, SW, they are arranged, for example, in such a way that they come into the area of the scanning light beam when they enter the compartment or when they exit and in the error state openly. An error condition then generates an electrical pulse LF ₁ , SW ₁ when the machine gunner flies past the scanning device .

Except for the guard elements LF and SW, which are

in two states - open and covered - there are more on the shooter. Always open reflectors M ₁ , M _s attached, which generate _{pulses M 11} and M _S1 in the light receiver each time they fly through the scanning area. This

J5 pulses (marking pulses) form together with the impulses characterizing a state of affairs (guardian impulses) "a pulse train which is produced by the evaluation circuit with regard to the occurrence of pulses within certain time intervals will.

The marker _{pulses M 11} and M ₂ could also be generated in other ways, e.g. B. with the help of magnets mounted in the shuttle and scanning coils attached to the sley. A purely optical scanning device, however, is less complex and considerably easier to grow.

When monitoring the weft entry, the following four phases of the contactor cycle, i. H. of Back and forth flight of the shooter, of interest:

Phase I: Entry of the shooter into the compartment, flight direction U (for example from left to right).

Phase II: exit of the shooter from the compartment, flight _3S direction / ,.

Phase III: Entry of the shooter into the compartment, flight direction / "(for example from right to Left).

Phase IV: the outlet of the shooter from the tray flight f _r

In this example, the monitoring program is intended to monitor the weft thread, the monitoring the shot coil and the monitoring of the firing of the shooter (determining whether at all a shot has occurred) included. The distribution of these functions to the individual phases of the The contactor cycle is as follows:

in I: control of the weft spool
Control of the launch,

in II: control of the weft,
in III: control of the launch,
in IV: control of the weft.

In the absence of a launch message and not intact weft the actuation member S is to cause the stoppage of the loom, in case of empty pirn to the actuating member to W

Initiate bobbin change. Instead, with non-automatic machines, the loom can also be shut down in the latter case, for which purpose the corresponding line would only have to be connected to S at the output of the evaluation circuit.

S5 In order to carry out this monitoring program, the shooter is equipped with the method shown in FIG. 2 provided arrangement of reflective elements. LF and SW denote the

5 .6

Guard elements for the weft bobbin or the pulse R ₁ triggers another timing element Z, which is used for the weft thread, while M ₁ and M _{2 are} two Markie control gates T ₄ and T ₅ . T _t is indicated penetration elements, which, as mentioned, are only permissible when the output of the timing element Z point is in an open state. It is important that (6), the state Z ₁ prevails, T _s, on the other hand, is through-distances between LF and M ₂ on the one hand and SW 5 during Z ₁ '. The gates of T _6, in series with T _4, and and M ₁ on the other hand remarkably from each other different T _1, in series with T _1, are derived from the timing element K (T ₆ to and are both less than half of the waste at K ₁ , T ₁ at K ₁ ) controlled. This timing element becomes status M ₁ M ₂ . with the help of a tactic derived from the loom

In the following it is assumed that the counter KW _{1 is} triggered, which appears at the input (2) of the shooter's speed limit after the negative value circle has taken place. In the present example, the shot lies within a given tolerance range. When the triggering shortly before the entry of the shooter scanning of the shooter can now take place within zen in the subject and the time constant of the timing element K _{by the marker pulses M 11} and M _{21 be} so large that the pulse K ₁ longer limited time interval the LF and SW corresponds to the sampling interval M ₁₁ M ₂₁ (or M ₂ , corresponding pulses LF ₁ and 5W ₁ only on a few to M ₁₁ ). The impulse K ₁ then occurs during the whole of the correct scanning, from the direction of flight of the shooter, in phases I and III, while occurring in pending positions. The two possible phases II and IV, the state K ₁ prevails. In species of the sequence of signal pulses at each passage of the shuttle through the shed who flyby of the contactors at a probe TK the thus through the states K ₁ and K _1, two timeThe first line (1) shows the pulse diagram according to Fig. 3, ao Defined sections, the beginning of which is linked to the work, whereby the marking impulses according to the cycle of the loom. On the other hand, marker _{elements with M n} and M _{21 are} designated by the timers P, R and Z in the bewurden. The two halves of the diagram are linked with the pulse sequence in the same way as the two flight directions Z ₁ and / _{2 of} the Schüt periods of time, which are defined by the states P ₁ or P ₁ , zen, ie phases I and II or III and IV .An as Ä, or A ₁ 'and Z ₁ or Z ₁ ' are identified, beHand of the block diagram according to FIG. 4 and that's true. When a pulse occurs, the pulse diagram according to FIG. 3 will now be used to describe a combination of states in the evaluation circuit, i.e. the evaluation circuit. Due to the simultaneity of K ₁ nrier ^ ₁ 'with To this, only the functionally important elements _{P 1} or P ₁ ', A ₁ or A ₁ 'and Z ₁ or Z _{1' are shown in the block diagram;} the bracketed 30 is sated. The evaluation according to a fixed reference number in FIG. 4 denote the dots, the working diagram applied is based on the fact that an imden unambiguously identifies the impulses of the correspondingly identified impulse by meeting a certain line of the impulse diagram according to FIG. 3 combination of states. is adorned.

The impulses appearing at point (1), the impulse ^{input of the output 35 J 0} ^ " ^{will be} the size of the time constants in the utilization circle, impulses appearing in two proportions to the given possible time intervals parallel gate chains T ₁ , T ₁ and T ₂ , T ₃ , T _4, T _6, which in the 3 manner visible g of pulses from F i. by time-determining elements P, R, Z and K overall set. the timing element Z, for example, disassembled each be controlled was investigated. the time-determining the sampling intervals in two Parts corresponding to the elements in this example are monostable multi-states Z ₁ and Z ₁ ', namely in such a way that in the vibrators. After the arrival of phases I and II of the contactor cycle, they deliver a pulse LF ₁ input pulse output pulse. P ₁ , R ₁ , Z ₁ and the state Z ₁ , while in phases III and IV K ₁ the duration corresponding to their time constants appears _{during Z 1 '} and K can the evaluation circuit is therefore sensitive to the output pulses. The time-determining occurrence of an LFj guard impulse in all four element P is differentiated from an input impulse over a phase, if one is first of all from one in F.ig. 4 indicated by a capacitor differentiation from the others in the same differentiator triggered, namely by the combination of states occurring impulses falling edge of the impulse. It is used, as can be seen from this: In phase I, LF ₁ can only be seen with K ₁ and Z ₁ block diagram according to FIG. 4, for control 50 in II with AT ₁ 'and Z ₁ , in III with K ₁ and Z ₁ 'and ir of the gates T ₁ and T ₂ , of which the first one occurs at I ^ with K ₁ and Z ₁ '. For the unambiguous feast its first input passing impulse, setting a LF. Impulse serve in the further dit if at the same time on its second, with the timed elements P and R. These cause in principle a unifying element connected input an im- differentiation between the Pulse intervals before pulse P ₁ occurs, while the second gate T _{2 is} then permeable to 55 M _u and LF ₁ on the one hand and from M _n and SW _x to a pulse when the timer on the other hand. If a signal pulse hits a pulse P ₁ at no pulse P ₁ or, in other words, it has a characteristic distance from the previous one for when at the output of the timing element P, point (4) in the occurrence of SW ₁ , Fig. 4, the ZustandP ₁ 'reigns These designations Where a signal pulse, however, the ZuständeP _1' to planning as was common for the other Torschal- 60 R ₁ so that all the so-called coincidence circuits stepped in front of him a pulse ii obligations, a distance at which the Distance between M are used. Corresponds to the transverse to the transit direction and LF _1. This results in directly opening entrances of the gates is given in Fig. 4 the specified working scheme of the system at the state for which the gate is permeable fitted combination of states, which is the Wej. In the same way as the partial element P, 05 of a signal pulse also becomes one of the actuating elements! the timer R is triggered and makes the gate T _s must release:

permeable, if at its output, point (S), a 1.) If a signal pulse occurs _{in a time interval on pulse R 1.} The falling edge of an Im- in which the states KP 'R

SSSSS

* * ^Abstdlms * · ^w * ^luh ' ^s

Is

■ sSygssSS - S3SSEffiS £

is a little longer than de J ^ "™", _{the inn of the} &), urollintervalls, so that the smallest pulse M ₁₁ and SW and Λ ^ a little longer g ^^ _{speed of the pouring at} the

Distance ^^ "^ •""Juaenüeen that the from the scanning point by the duration of the pulses R ₁ T ₁ from Z has the condition ^ sufficientj ^ ^. ^ _{D distance of the mark erU} ngs-

Abstan ^^^ Juaenüeen that the sampling point by the duration of the impu _{1 1}

of Z has the condition ^ ^ sufficientj ^ ^. ^ _{the distance of the mark erU} ngs-

first pulse of a sampling interval. s ag elements Af ₁ and M _{2 are given} in Sagittarius. The

Interval R ₁ + Z ₁ ^la "6 ^er ^ ^a « ^ert , fj f [ _nterv ^l _{aH M End of} the control interval, in which no signal.mb · K «e mentions g oßer ate dasnw ,, ^^^ ^^ _{wjrd mU H. Jfe des Tqk f§}

₁ , fj f [ _{ntervaH M En} de

wobe · K ₁ w «e mentioned g oß he ate the nw ,, ^^^ ^^ _{wjrd mU HJfe des §}

^W · ,. . ^be . ⁿ r. ^ß :. ^! f ^? ™ i, Si T * tkSfe determined, determined by the EnUe of the state * Z ₁ . From the durcn aenrtinw »» «- · · - · - · _h ■■ _{with F} ig.5 time constant of Ze.tgliedes Z depends üaner« «. You can, edoc h, JJ «^^^ S meaning 30 smallest can still be monitored in this way will be discussed, nor an anaeric speed. The ultimate limit for that

get. cw.type close-up shot takes place with control interval is through the time of the Jr-

The control togf ^ S ^ inJulses translucence of the next expected pulse signal using the from the ABFA ^lend ^ ^ ^Arr _{Ιπιρι1 Γ 5ε5} k. given in the following phase. K ₁ by ^Dlff " ^e " ^ ^r S _ch ^g _u ^e ™ _d the end of the 35 signal pulses that occur in the control ^interval, _covered with a normal shutdown J irQ. _{TrifTt ge} l _a "ge _n over the crossbar T _H. that in state T uvxh-

impuhes K ₁ ^v ^ _d ^e ; f _z ^m _us 3l ^S _/ ^Z _a ¹ _n , T _o ^er means this is casual, and about the gate T _n , which during the / unun ft in gate T ^ J ^e n Zus ^ an ^ , ^ _ _{siandes through} , _{ässig is <to the point {y) of the} Au-

Either that before the "three _WPr tekreises and generate a control pulse nir

impulse occurred jemgensmeh bs ^ ^ _α ^ ^ ^^^

point that travels further as ^ _{or not The} speed of the shooter is in the alK.c-

corresponding, that is, that acr1 control meanings when entering and exiting the compartment

correct ^a ^ hossen litter j or α _{or the compartment e) what schicden so that there are two} ckniaL'.g

The system is not working and either “ _{e circle} _ _{In can be <the} time constant of the current T slot

on the ^ ege jI) H5) ' _{hk can be changed by 45 the help of the} timer K , per night,

In this case let the lor, κ Abstell- whether the shooter is in phases 1 and UI or H

[s. Line (7), Fig. 31, and this is _{found. The monitoring can only be carried out}

organ S from the presence of Z with the help of K also affects the phases! and Hl proven

Conversely, aas presents « _{ken afld must fes} , _{em r work}

meeting of ft ^e ' ^ne f "^ f ^^ i D it Biil i

Conversely, _{afld must fes} , _{em r work}

Arrival of ft ^e ' ^ne .f _a "^ f ^^ Function 50 The example shown of an evaluation circuit feeds the shooter ais au _wm _j the Si to adapt to any desired work program, the scanning device and the ^ vvegc y, _s ^ _jnzipiel , _{every function in every phase from} p _C üW

gnalsinderAuswertevorncmungad. _ufse . _ne ^^^ _can ^^ ^^ ^ _Ab , _aMvorricll , _uni

The "b ^ i ^^ in a simple way in the ar-speed with other than electro-optical means can be used in "" "" device 55, e.g. B. partially with inductive Signalibnahnw

Work program of the ^DESL. '_{"May be, for} j _{e BD} arrangement of pulse generating elements in a record soUrhe UDerwa ^ ^^ Protect is also the conditions and gc are that one test sw ^ adaptable _{to the Wanting} schten functions in any way.

1 sheet of drawings

209681/31

Claims (5)

ι 2 a mostly contactless with the shooter to- Patent claims: interacting scanning device for generating 1. Method for monitoring the weft of signals which have the status «g" **** ™ * »thread entry with automatic shooters, in which the shooter or the ^ ******** AbtaLrorm with the help of a scanning device the input 5 In the following, an evaluation circuit will test electrical impulses for the direction of all those people of an evaluation circuit electrical! Impetus for the right j Generation of control pulses at the output of the line of signals from ^ J ^^ X ^ l ii fh d ddh Di signals are m emem Auswerteki ^ ver Generation of control pulses at the output of line g Output circuit are supplied, thereby these signals are m
marked that the input of the works, for example with specified values
Evaluation circle temporally successive Im- io reshaped, delayed and ^sch - ^ ™ _n ^ "
pulse (Af ₁₁₁ M _n , ^, LF ₁ ), the mmdeitens the supply of control pulses to control the
Condition of the weft thread and the weft bobbin sisiuhles used. . "^, ^ ^ 53139 is at- gnalize, be fed to the above them to- By the ^ f «*" **? *? device for orderly and sp. wise em method during certain time periods and a device for closed lines of the evaluation circuit known to the weft coil monitoring, ™ ** «« «output of the same. electro-optical scanning device consisting of 2 The method according to claim 1, characterized in that a light source and f ^ _y ]? *** W * ° g * denotes, let the beginning end end of the closure, facing the ^protection ! "^" Ssens the Lines of the evaluation circuit of a probe head and emem on the weft side depending on the work cycle of the web * o steering body attached «« ^ektiere "« ⁿ ™ *% J ¹ * chair and on the other hand with the help of the timed signal generator for the evaluation circuit ** « · «■« «consecutive impulses is determined 3. The method according to claim 1, characterized in that the covering normally covered by the weft thread indicates that the temporally successive and reflects the scanning light beam to light emitting pulses (Ai _n , M _n , SW ₁ , LF ₁ ) next to the in- » 5 catchers. The Ausweiekre.s versaf ^kt ^. ^{d ver} ' ^an gf ^r formation on the condition of the weft thread this signal pulse and causes, e depending on the design of the and the information about the filling level of the loom, either its shutdown or the weft bobbin, in addition, the information about the initiation of an automatic bobbin change.
Speed of the shooter included and method and device for monitoring this separated due to the zc-.licnen distance 30 weft thread in the shooter are ζ eg evaluated from the scnwe.zeder pulses w = approx. Roman patent 396 801 known. Then suitable 4. Device for implementation of the insurance for this function, in particular an electric drive according to claim 1 and 2, characterized in that the optical scanning device with an in the shooter indicates that the evaluator is controlled by both the attached reflector, the effect of which is controlled by the loom by temporal presence and the state of the bcnuutaaens Beanderfollowing pulses (M ₁₁ , M ₂₁ , SW ₁ , LF ₁ ) is correct. In the case of the deactivatable, time-determining electronic construction key, a fault condition causes an element (K, P, R, T, Z) to appear or not to occur and which contains a guard pulse and triggers gate circuits (T ₁ to T ₉ ) flowing through the evaluation circuit , which turn off a control signal that turns off the loom.
The path of the impulses through the evaluation circuit is _{fixed. 4} o Monitoring of the contactor movement, ms occupy. special the shooter speed is in the 5. The device according to claim ^ characterized in Swiss patent 389 528, characterized in that to generate the temporally up- The scanning device contains, for example, a consecutive pulse (M ₁₁ , M ₂₁ , SW ₁ , LF ₁ ) opposite to the shooter arranged resting coil In the shooter both monitoring elements (LF, 45 which act with two in the shooter in a certain distance SW), the permanent magnets attached to the condition of the weft thread and the filling state of the weft bobbin is influenced. The method is based on the comparison of the marking time interval between the two elements (M ₁ , M ₂ ), which cannot be influenced, when the elements (M 1, M 2) fly by. Protect on the coil with generated signal pulses such a setpoint, which a timer of the evaluation