DE1944808U - THREAD RUNNING KNIFE FOR TEXTILE TRAILS. - Google Patents

Description

KYOTO KIKAI KABUSHIKI KAISHA, 50 Ki sshoin-Funadocho, Minami-jku,

Kyoto / JAPAN

Thread runner for textile webs.

The invention relates to a thread runner for moving textile webs.

The angle of inclination of the threadline that will be used when processing Textiles occurs, can be up to about 10 °. If it is a continuously moving textile web, it changes the angle of inclination of the weft threads at each point of attachment suddenly ■ borrowed by 10 to 20 degrees. It is with the well-known linear gauges possible to measure the angle of inclination in a narrow area, but with larger fluctuations or sudden changes an automatic measurement of the angle of inclination is hardly possible up to now. So far we have been content with stronger ones Correcting deviations in the thread run by hand, so in the small range of fluctuation recorded by the thread run meter can be to come.

■ v.iiÄitJii

The object of the invention is to create a thread linear meter for 'running textile webs with which the weft thread' angles can be detected in a wide range with high sensitivity j.

The thread runner according to the invention for running textile webs is characterized by a thread counter for generating a signal voltage with the frequency of the number the threads passing by in the unit of time and a thread runner detector, Consists of a light source that is operated at the frequency of the signal voltage and directed onto the textile web and an imaging device located on the other side of the textile web, which the thread image in the continuous Light the light source on a photoelectric device designs.

An embodiment of the invention is based on the following described in the drawing. Are in it

Fig. 1 is a schematic representation of the invention Line knife;

2 shows an illustration of the thread run detector in detail;

Fig. 3 is an enlarged view of different thread courses Id ern;

4 shows the course of the thread running images corresponding to these electrical signals;

Fig; 5 is a block diagram of the evaluation device and the

"° ί ι

ν ί. ,

- 3

occurring in different places of the same electrical signals;

6 shows a sectional illustration of the thread counter in detail and an evaluation curve;

7 shows the representation of an evaluation curve in the thread runner detector; Fig. 8 is a diagram for explaining the invention for

Detection of curved threadlines; and 9 shows a diagram to explain the invention for the detection of inclined thread runs.

In Fig. 1 ■ a textile web 1 runs in the direction of the arrow χ past two scanning devices 2, 2 ¹ , which are arranged symmetrically to the right and left at equal distances from the center of the textile web and from synchronously switched on and off light sources 3 and 3 * and imaging devices 4 and 4 * facing them. In the middle of the textile web 1 is a thread counter 5, consisting of a light source 6 fed with direct current and an imaging device 7 opposite it.

The thread runner gauges 3 and 3 'are used to detect the course of the thread in their place, to generate electrical signals corresponding to the angles of inclination of the weft threads at this point and for measuring the angle of inclination of the weft threads by the difference between the two electrical signals. The thread counter generates electrical signals, the frequency of which corresponds to the number of threads passing through, and synchronizes the input -

Switching off the ^r light sources 3 and '3' with the number

through

Fig. 2 shows in detail the structure of a yarn path detector 2 or 2 ¹ . Fig. 2A is a horizontal section, Fig. 2B is a vertical section, and Fig. 2C are front, axial and rear views of the photo-element slit disk.

The light source 3 or 3 'contains a tubular gas discharge lamp 8, which is switched on synchronously with each thread pass in the thread counter 5. For concentration and parallelism A reflector 9 '', partitions 10 to prevent scattered reflections and a condenser 11 serve for the light. The imaging devices 4 and 4 'each have a narrow, long gap in the direction of the prescribed thread run of the textile web ι Mistake. A cylindrical lens 13, the axis of which runs parallel to the gap, is located behind the same. There are more behind Column 14 and 15 attached in the same direction. Below the Gap 15 is a rotating disc 16, which is from a synchronous motor 17 is driven via a countershaft 18. On the axis of rotation of the disk slip rings 19 are arranged isolated from the axis, on which brushes 20 grind. The brushes 20 are led to connections 21. On disk 16 is one A plurality of photocells (photo elements) 22 attached radially at regular intervals on the rear side. In the disc are located in front of the photocells 22 corresponding radial

^{Λ : ::} Ά "' S £ ^^ ^^^^ S ^^ ißlM ^^ MM ^^^^ SMa

Seat 23.

Pas light emanating from the gas discharge lamp δ passes through the condenser η and the textile web- ι onto the cylindrical lens 13 and. is concentrated by this on a line parallel to its length. If the direction of the weft threads coincides with the longitudinal direction of the slot 12 * the enlarged images of the weft threads created by the lens 13 become the largest and the images of the warp threads disappear completely. If, on the other hand, the direction of the weft threads intersects the center line of the gap 12, the images of the weft threads become gradual. smaller ,, the crossing angle grows to about * - * 20 ° _{QXi 1} . the images of the weft threads disappear completely. "If the enlarged images of the weft threads produced in this way are designed on the gap 15, which is slightly wider and shorter than the gap 12, then images result according to Pig", 3, Bei I in Pig, 3 the case is shown that the direction of the weft threads coincides with the direction of the gap 12 «At II and ΙΪΙ the cases are shown that the pad running direction deviates from the longitudinal gap by the angles θ and 2Q » The hatched parts correspond to the shadow of the Weft threads and the white parts in the spaces between the weft threads. A further gap 14 between the lens 13 and the gap 15 is used to mask false beam paths ₀

When the disc located immediately behind the gap 15 eats revolves in the direction of arrow Y «so feel the radial

Slits 23 the thread images designed on the gap 15 from one end of the gap 15 to the other. If it is ensured that adjacent slits 23 do not touch the gap 15 at the same time, and that scanning through the next slit 23 begins immediately after scanning by one slit 23, then the output voltages according to FIG. 4 result at the Terminals 21, to which all photoselles are connected in parallel

The investigation of the signal voltages results in one the following; "

If the width W of the slits is selected properly in Figure "2 23" so 22 generate the Abtastphotosellen a voltage large amplitude in the bright part _r a voltage of small amplitude in the dark part and a voltage average amplitude in üebergangsteil between the bright and the dark part of the enlarged thread images _o curves i ^1, II "and Ili 'in Fig ₀ 4 show the resulting voltage profiles for the cases I, II and III in Fig * 3" when the envelope I ", II" and III "of the curves in Figure be considered. 4 so it follows that the envelope I ^Si is a straight line, while the curves II "and III" vibrations of different frequencies.. correspond "the frequency of · H ⁵ GTE! curve thus appears to depend on the Neigungswinköl the Weft off »

5 shows a block diagram of the arrangement for evaluation

the voltages emitted by the photocells 22. The Signalspanntang a at the output of Abtastvorriehtungen ,, so the inhibiting 21 "is applied to an amplifier 25." This has a uniform gain for frequencies between 100 and 20000 Hz and has automatic gain control "at its output enters the voltage curve b in FIG _e 5 on "A demodulator with filter circuit follows" - which rectifies the oscillation b and filters out the synchronous frequency component of the weft = · threads "era output of stage 26 results in the voltage curve c It is fed to a low-frequency amplifier 27, the gain of which is the higher the smaller '., / the input voltage is »By means of a bias voltage, the voltage curve ü is achieved in which the upper and lower. Tips are cut off "This is followed by a differentiating stage 28, which generates needle pulses e of a single polarity either when the Ira pulses rise or fall after d

are shown at £ ... This means that the number of Envelope maxima in Pig, 4 a

as is well known

se the Aus & kl the where of the curve I ¹ no

, ö.seigt the construction of the 6B are cuts in to each other

5ο Fig. 6D

bucket demodulator «The light source 6, which is fed with direct current, consists of a Qlöalamise SO and a convex ¹ lens 31 ■> The scanning device 7 has a long light entry slit 32, which is located in the optical. Axis Z ~ Z ° of the incandescent lamp 30 is "a cylinder lens 33 arranged under the entry gap 32, the longitudinal axis of which extends in the longitudinal direction of the entry" gap, a narrow long gap 34 under the "cylinder lens 33" with its direction the Llxigsaclise of cylinder = - lens _s matches a halbzylindrisehe lens 35 below the gap 34 "whose longitudinal axis perpendicular sur longitudinal axis of the cylindrical lens 33 runs" a thy circular hole 3-6 and a circular aperture 36 'of the cylindrical lens 35 and finally ©! In a photo 37 under the aperture 36, the direction of the longitudinal axis of the cylinder lens 33 is parallel % nv direction of the threads in textile web 1. The light from the incandescent lamp 30 is made parallel by the iconvex lens 31 and illuminates the surface Textile web 1, the light passing through the long narrow entrance gap

32 -the cylindrical lens 33 »Wnn of the weft threads now falls the direction parallel to the clearing of the longitudinal axis of the enlarged by the cylindrical lens of the image is, so is the magnification of the. Weft cut-most and the warp threads disappear practical .As the cylindrical lenses 33 and 35 mutually perpendicular cut, is at au the seal of the cylinder lens

33 parallel thread run of the weft threads das.verlarged picture of the "" "weft threads pass through the gap 34 and onto the

β)

Calf cylinder lens 35 fall "Since this is perpendicular to the image of the weft thread, the light passes through the semicylinder lens 35 without any magnification and the part of the same passing through the circular hole 36 is thrown onto the fäotocell 37" If, on the other hand, the thread path of the weft threads does not coincide with the longitudinal axis of the cylinder lens 33, its magnification is reduced and, on the other hand, the passage of light through the half-cylinder lens 35 results in an enlargement because the image of the weft threads has a component in the direction of the longitudinal axis of the cylinder lens 35 In the course of the thread, the enlarged image «3 weft threads on the photocell 37 an almost constant quantity» From the resulting voltage at the output of the photocell 37 «which is composed of a direct current component, the level of which depends on the ratio of the scirass thread area to the space between the weft threads» and an alternating current The proportion of "which is generated by the wandering of the self-threading images via the photoselle 37 -" - can be obtained. "The synchronous frequency of the weft thread movement can thus be obtained in a known manner by evaluating the alternating current component" Through the stabilization "^; of the enlarged thread image, the amplitude of the alternating current component is also stabilized because the enlarged image with different®! The directions of the thread run have the same dimensions and the perforated diaphragm is 3.6 ° circular _o

Fig. 6F shows the signal measured with the thread counter 7

• tension when passing <ain®x_ textile web ,, the maximum values of the alternating voltage splits are plotted in the ordinate direction * The abs & i & st s <sig the angle of inclination to the right and left, where <3 © r angle is 0 ° if the direction of travel '' the shot £ gd @ n and the ^ ielattasig d © r Längaclis® d @ r cylinder lens 33 are parallel to each other. The alternating voltage generated ironfe P2iotos © lle 37 was amplified without distortion by "'60 db ο Der!" SpanBiangsVerlamf was examined with an oscilloscope »" The amplitude values and <äi <s waveforms in the 'case of different inclinations' of the weft threads are determined * As the characteristic curve shows, if the alternating voltage for the angle of inclination 0 ° Maxirauffio Wean äi @ s is set as 100 % , then the output voltage is at an inclination of ..

* 30 ° 77 % and. at <te leigrag - 40 ° 70 %. On the other hand, it was found that their oscillation path even at an angle of inclination - of * 40 ° not of .d @ mjenig © n. deviated from 0 ° ο

© the output voltage of photocell 37 About amplifies a capacitor abgesiorawen "in a Breitbandver ·» more vmü to the gas discharge lamps 3 and 3 given! in the AC% ut supply d @ y Liekt ^ melXen 3 and 3 * to win ".If as'"As Breitbandverst & lCERs .can a normal booster FTTO ^one sound reproduction vsrweaaet w © r" Let _e The Gasent- "discharge lamp 8 has, for example © ine L @ istungsaufnähme of 4 W" In Halbw @ 13 @ nb @ t3? i @ b mo ? ä @ n stabilized light sources

3 and 3 'for. the synehron frequency from 30 to 25,000

Output signal in the yarn path scanners 4 © der 4 ', measured at the output of the outward circuit according to Pig »5 using the parts described so far» The measured voltage is plotted in the ordinate direction as DC voltage. In the abscissa direction, the pad running angles are ^{plotted to the right and left of 0 0,} ie, the thread course parallel to the longitudinal direction of the gap 12. This characteristic is called rait A. Curve B is the characteristic of a well-known thread running device. The comparison of curves A and B shows that the device according to the invention has a high sensitivity in a wide angular range.

FIG _e 8G and 8H seigen as erfindungsgeraäß a curved yarn path on the basis of the curve A in Fig ₀ 7 by means of two thread Laufer setter 2 and 2 ° (Figure "i) determined were can" The longitudinal direction of the light entrance slit 12 bw "12 ^S in the two imaging devices 4 and 4 ° at this' end against the normal "undisturbed Padenlaufrichtung in the textile web ι inclined this is shown in outline in Figure" 8Q "the dash-dotted line I shows a geradep _s undisturbed yarn course, the dash-dotted lines II and III aeigen straight, but inclined thread runs and the dash-dotted lines IV and Y show curved thread runs »Column 12 ^:

and 12 * are here inclined to the line I by the same angle δ. Fig. 8H shows on the abscissa the angle of inclination of the weft threads for both yarn travel detectors, the polarity of the curve shown in FIG. 7, i.e. the output direct current of the evaluation circuit, remained unchanged for part 2, while the polarity for part 2 * was reversed »The angles of inclination to the right and to the left are marked with +0 and - ©, the voltage polarities with + and - and the characteristics of parts 2 and 2 ^f symmetrically with A and A * <. If there is no curvature of the yarn path, a straight line drawn vertically upwards from the yarn path angle -G intersects the characteristic curve A at point f. If a perpendicular to the ordinate is made from the intersection point f, the intersection point ^ e ₁ results in the output voltage of the yarn path detector 2 »Likewise this results in the output voltage of the yarn path detector 2'au «.β-, so that the repetitive voltage disappears after the polarity reversal of one output. approximately gcuröß curve IV, the angle of inclination of this weft thread against the gap 12 is almost zero, which is why the ^; The output tension of the thread run detector 2 almost disappears. If, for example, it has the value -Θ », then the vertical line established at this point of the abscissa intersects the characteristic curve AV at point g« and one obtains the output voltage -e * in full jars *

δ5 * * *

13 '

Conditions at the thread running line ¥ ₀ Here in the area of the thread detector 2 ° the direction of the gap 12 ° and the thread running almost parallel »so that the initial tension almost disappears. In the Segend the yarn running · = erfassers 2, however, a large inclination angle with respect to the gap 12 to ₀ occurs Did this -θ the value ', the result is the intersection g .with the curve A "Thus, an output voltage * @ gi The polarity of the resulting Tension corresponds to the sign of the curvature of the thread running it and the magnitude of the resulting tension is proportional to the degree of curvature.

The representations J and K in FIG. ₉ 9 explain the detection of inclined thread courses in a similar way to FIG. 6. The only difference to Fig. 8 is "that now the inclination angle of the column 12 and 12 'of the thread Laufer setter 2 and 2 * symmetrically -against at the same angle © the horizontal dash-dot line are arranged I ₉ Again, the outputs of the thread Laufer setter 2 and 2 ° switched against each other j ■ so that the characteristic curves of the resulting voltage in Fig-, 8H and Pig * SZ do not differ from one another «, in the case of line I without a grain distortion results at the output of the; '. Thread path detector 2 again a tension + e- as in Fig. 8H ₀ The construction for the thread path "detector 2" this time must start from the point · * · © and leads to the point of intersection h _s which again is the output voltage - ^ e ^ results, so that the resulting output voltage -e * again v @ r-

if the path of the pad is curved, roughly according to the curves iy and 7 in FIG

the dashed line II in Pig _o 9J »so is

i
ι

the Au sgang s voltage of the F4denlau £ erfassers 2 is very small "veil of Padealauf almost parallel to the gap 12 is effected * Opposite the gap 12 ° a large ■ inclination angle ^ is obtained, however, the central bus station _6, the value + © 'has" From Fig. 9K to read hierftär an intersection i with the curve a 'from which an output voltage - corresponding to "e" "" vice versa are the relationships when the gestriclielten line * here, therefore, only one © resulting voltage .on _β when a straight or nearly occurs straight, inclined thread run is present and the polarity of the resulting tension depends on the sighting of the thread run from "■

With the invention, an automatic control of the thread run and the thread run curvature can be carried out if

become »Of course, an immediately readable one is also possible

the invention eliminates the need for a position of the FaäeBlaufes ψοη hand gear

Claims (1)

! PATENT ADVOCATE DR-HEINRICHHERMELINK Munich, around 24 »June 19ββ 8 Munich-Obentienzing K 34 ^ Dr "Hk / Tue Apolloweg 9, phone 572743 KYOTO HICAI lABÜSHIKj; ZAISIA ₉ 50 lisshoin-Funadoeho, Minami-ku ,. ' Kyoto / JAPAN To claims Thread measuring device for running textile webs, jg ^ gkengzeichaet by a thread counter (5) to generate a signal voltage, the frequency of which is viewed! which equates to threads passing by in the unit of time "and one or more thread runner detectors (2, 2 ') consisting of a light source (3, 3 *) directed at the textile web and one on the other side, switched on and off at the frequency of the signal voltage the textile web (1) arranged imaging _{device (4 e} 4 "λ which designs the pad image in the light penetrating the textile web on a photoelectric device, Thread run knife according to claim 1 “characterized in gel, ■ that the thread counter (5) from a fed with direct current Light source (6) and a receiving part (7) arranged on the other side of the textile web, which contain an optic (33 »35) and a photo cell (37) 3 »pad en runner blade _ ₉ ■ that the optical system comprises two 'crossed cylindrical lenses according to claim 2, characterized in that the almost independent in conjunction with Locliblenden (32" 33 "36 ₉ 36") ä @ T F _a denlauf tilt it image of the incoming weft threads on the photocell (371 design, characterized in that the light source (3) of the thread runner contains a gas discharge lamp (8) fed with the frequency of the alternating voltage emitted by (5) and that the imaging device; the picture of the weft threads running by in the light of the designs "'which runs in the sighting of the weft threads and from a rotating disk Iiβ) is scanned, which with radial carriage (23) is provided '' behind which