EP0093865A1 - Palpeur pour la détection de coutures - Google Patents

Palpeur pour la détection de coutures Download PDF

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Publication number
EP0093865A1
EP0093865A1 EP83102867A EP83102867A EP0093865A1 EP 0093865 A1 EP0093865 A1 EP 0093865A1 EP 83102867 A EP83102867 A EP 83102867A EP 83102867 A EP83102867 A EP 83102867A EP 0093865 A1 EP0093865 A1 EP 0093865A1
Authority
EP
European Patent Office
Prior art keywords
web
detectors
distance
scanning device
scanning
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP83102867A
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German (de)
English (en)
Other versions
EP0093865B1 (fr
EP0093865B2 (fr
Inventor
Alfonsius A. J. Van Dijk
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Johannes Menschner Maschinenfabrik GmbH and Co KG
Original Assignee
Johannes Menschner Maschinenfabrik GmbH and Co KG
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Publication date
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Application filed by Johannes Menschner Maschinenfabrik GmbH and Co KG filed Critical Johannes Menschner Maschinenfabrik GmbH and Co KG
Publication of EP0093865A1 publication Critical patent/EP0093865A1/fr
Publication of EP0093865B1 publication Critical patent/EP0093865B1/fr
Application granted granted Critical
Publication of EP0093865B2 publication Critical patent/EP0093865B2/fr
Anticipated expiration legal-status Critical
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Classifications

    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06C—FINISHING, DRESSING, TENTERING OR STRETCHING TEXTILE FABRICS
    • D06C13/00—Shearing, clipping or cropping surfaces of textile fabrics; Pile cutting; Trimming seamed edges
    • D06C13/02—Arrangements for detecting the presence of a seam in the fabric to lift the shearing blade

Definitions

  • the invention relates to a scanning device for determining web seams in web processing machines, e.g. Clippers, the control of which is to be acted upon in seam detection, with at least two detectors scanning the web at a distance from one another, the scanning signals of which are fed to a control circuit which, when the scanning signals of at least two detectors coincide, only issue a control command to the machine control.
  • a scanning device for determining web seams in web processing machines e.g. Clippers
  • a plurality of web sections are sewn or glued to one another for the mechanical processing of webs of goods in order to be able to capture a larger web stock in one goods pass.
  • seam detection is necessary, e.g. in order to lift the shears from the web when the seam passes through a shearing machine and thus prevent damage to the shear blades.
  • DE-PS 9 24 323 describes a device for determining a product connection seam, in which an electrical conductor, for example in the form of a metallic thread, is applied to the product web on one or both sides that causes a control pulse when two contacts connected to a control circuit are touched.
  • DE-PS 9 25 884 suggests treating the goods at the point to be taken into account, that is to say generally at the seam, with a conductive liquid, for example a salt solution or a weak acid to short-circuit the control circuit.
  • a Geiger tube is used as the seam detector, the web being wetted in the seam area with a radioactive liquid.
  • a thread impregnated with a fluorescent color is sewn into the seam, which is scanned by a photoelectric device comprising several detectors.
  • DE-AS 24 28 112 deals with a seam monitor in which a high-frequency probe head with a probe and at least one receiving device is provided which responds to an electrical conductor incorporated in the seam, for example a metal or staniol strip or a conductive film applied to the material web.
  • the object of the invention based on a scanning device, in particular according to DE-AS 12 68 557, in the establishment of which the coincidence of at least two scanning signals is provided for acting on the machine control system, is to provide a device which is very simple in terms of its design, with which web seams can be scanned that have not previously been specially prepared for this purpose.
  • each detector consists of one with its resistance track, which is machine-fixed, but adjustable across the web level, there is a potentiometer and a probe that can be placed on the web surface, which is arranged with little play on a coupling element, which is rigidly connected to the sliding contact of the potentiometer.
  • Such an arrangement known per se provides that two detectors are provided at a distance from one another transversely to the direction of travel of the web.
  • This arrangement which is the simplest in its design, is suitable, for example, for recognizing straight transverse seams in paper webs in particular, the probe heads being deflected at the same time when the seam passes.
  • a universal and therefore particularly advantageous in the context of the invention scanning device with which not only bevel seams, but almost all occurring seam shapes can be scanned with outstanding accuracy, consists quasi in a combination of the previously described alternative arrangements of two detectors in that two groups of each two detectors are arranged next to one another transversely to the direction of web travel in such a way that the two detectors of a group are arranged at a distance transversely to the direction of web travel and at a distance in the direction of web travel, it being further advantageous if the detectors of both groups arranged on a straight line transverse to the direction of web travel each have the same distance from each other.
  • the control circuit falls in the essentially the task of recognizing whether all detectors are excited within a permissible time and / or path tolerance. Only if this is the case is the seam recognized correctly.
  • a rotary potentiometer could be used as a potentiometer, in which the coupling member could be designed as a pivoting lever carrying the probe, it has proven to be particularly advantageous if the potentiometer has a sliding contact that can be moved in a straight line and if the coupling member, which is essentially rod-shaped, moves in the direction of movement of the Sliding contact extends. The deflection of the probe then leads to a linearly proportional displacement of the sliding contact and thus enables a particularly precise and simple acquisition of the measured values.
  • the backlash desired for the measuring accuracy can best be achieved in a particularly simple manner.
  • the probe head is preferably designed as a low-radial play roller at the end of the coupling member, which prevents an otherwise also possible configuration of the probe head, e.g. As a skid, more favorable friction values and thus, in turn, more accurate measured values can be achieved.
  • the invention provides that two potentiometers with opposite polarity to the control current are connected in such a way that, with the same deflection of the probes of these two detectors, the total measurement voltage is zero.
  • This creates a self-adjusting scanning device which only presupposes that all detectors are arranged in a plane parallel to the plane of the web. This can be achieved in a simple manner by arranging all potentiometers at the same distance from a web support.
  • the potentiometers of one group or all potentiometers are arranged together in a carrier which is adjustable with respect to the plane of the web, a simple adjustment is e.g. by adjusting the support in such a way that the measuring voltage can be set to zero, which e.g. can easily be done with the help of a simple voltmeter.
  • two carriers 11 for one detector 12 and 13 each are arranged in such a way that they are each height-adjustable (double arrow 14) and pivotally adjustable about an axis 15 (double arrow 16).
  • Each carrier 11 is located with the associated detector 12 or 13 above a table 18 provided with a fabric support 17, over which a web 19 is guided in the web running direction 20.
  • the web 19 shows two sections 21 and 22 which are connected by a seam 23.
  • the detectors 12 and 13 each comprise a linear potentiometer 22 with a resistance track (not shown) fixed in the housing and thus fixed on the carrier 11 and a sliding contact indicated by 25. This is rigidly connected to a rod-shaped coupling member 26, on the free end of which a preferably roller-mounted roller 27 acts as a probe head 28 is ordered.
  • a rod-shaped coupling member 26 on the free end of which a preferably roller-mounted roller 27 acts as a probe head 28 is ordered.
  • Each change in the thickness of the web 19, in particular the seam 23, causes a deflection of the probe head 28 and, associated therewith, a displacement of the sliding contact 25 upwards.
  • the resulting change in resistance influences the electrical values of the control circuit to which the respective detector is connected at 29.
  • FIG. 2 shows, two detectors 12 and 13 are arranged at a distance 30 transversely to the direction of web travel 20.
  • the control command to the machine control is issued when the scanning signals of these two detectors 12 and 13 coincide, i.e. that is, when both detectors are excited simultaneously by an unevenness of the material web in the arrangement shown in FIG. 2.
  • This very simple device according to FIGS. 1 and 2 is very well suited for the seam detection on essentially smooth surface webs with seam 23 arranged perpendicular to the web running direction 20, in particular e.g. for machines processing paper webs.
  • the arrangement described is less suitable for the scanning of such webs that have regular patterns, for example transverse grooves or waffle patterns on the back (which is usually scanned).
  • Straight seams of such webs could, however, be scanned, for example, by moving one of the two detectors 12 or 13 relative to the other detector 13 or 12 in web direction 20 orders. This is illustrated in FIG. 2 with the detector 13 'taking the place of the detector 13, which is offset by the distance 31 in the direction of web travel 20 from the other detector 12.
  • transverse seams can also be detected on patterned or profiled webs, the only requirement being that the pattern repeat has a dimension different from the distance 31.
  • the electronics here have to hold on to the pulse generated by the first-responding detector 12 by changing the resistance until, in accordance with the set fabric running speed, the time has elapsed that a seam would at least need to reach the second detector 13 '. If this second detector 13 'then responds, the seam is recognized; if it does not respond, no control impulse is passed on to the machine control. In many cases, even with such a device, cross seams of the type of seam 23 can be detected with sufficient reliability.
  • the detector arrangements described above also have the disadvantage that oblique or special seams cannot be detected, at least not with sufficient reliability. However, this is easily possible with the device shown in FIGS. 3 and 4.
  • two groups 32 and 33 of two detectors 34, 35 and 36, 37 are arranged such that the detectors 34 in the direction of web travel 20 and 35 and the detectors 36 and 37 are at a distance 38 from one another and are each offset by a distance 39 in the direction transverse to the direction of web travel.
  • An arrangement is provided in the vicinity of both web edges, as corresponds to that last described with reference to FIG. 2.
  • the mode of operation is understood as follows with reference to FIG. 5.
  • the path / pulse generator 42 keeps the pulse caused by the detector 34 usable at least until the seam - if it is is one - the detector 35 should have reached.
  • the detector group 33 having the detectors 36 and 37, in whose circuit a differential logic 43 is also connected, which is also linked to the path / pulse generator 42.
  • the material web has unevenness, which in the device according to FIGS. 1 and 2, if in line with the detectors 12 and 13 or 13 ' lying down would result in the recognition of a straight seam.
  • the differential logic connected to these two detectors 34 and 35 initially recognizes on standard seam. However, since neither the detector 36 nor the detector 37 are energized, the differential logic 43, which is connected to these detectors, cannot detect at the seam.
  • the link logic 44 which only receives a seam detection from the difference logic 41, can no longer detect seams due to the missing message from the difference logic 43 and does not give a control pulse to the machine controller 45.
  • the special seam 40 ′ shown in FIG. 4 passes through the scanning device. This means that the detectors are excited by the thickenings 50 to 53 in the order 34, 36, 35 and 37. Accordingly, the difference logic 41 first detects a seam, with a slight time delay the difference logic 43 also determines a seam. Since the logic logic 44 has now received a seam message from the two difference logics 41 and 43, it also recognizes the seam and responds to the machine control 45.
  • diagonal seams of the type of diagonal seam 40 can of course also be recognized with the device according to FIGS. 3 and 4.
  • the path / pulse generator 42 is closed only for this ensure that unevenness of the material web that is too far apart in terms of time or distance may no longer be recognized as a seam.
  • the logic function essentially has the task of not accepting a seam as reported by only one detector group 32 or 33 via the associated difference logic 41 or 43, unless the other difference logic is also available at a later time according to the setting of the path / pulse generator Seam reports. On the other hand, it has the task of recognizing a seam when the difference logics 41 and 43 report a seam, either at the same time or with a time delay.
  • the detectors 34 and 35 on the one hand and the detectors 36 and 37 on the other hand are each connected to the control circuit with different polarities. If the detectors 35/35 and 26/37 of a group 32 or 33 are acted upon in the same direction, the resistance of one detector is to be reduced thereby, while that of the other is increased by the same amount. An adjustment of a detector group 32 or 33 is therefore possible in a simple manner by adjusting the total measurement voltage to zero. This is possible in a simple manner by the pivot adjustment arrangement of the supports 11 for the corresponding detectors described at the beginning.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Controlling Rewinding, Feeding, Winding, Or Abnormalities Of Webs (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Length Measuring Devices With Unspecified Measuring Means (AREA)
EP83102867A 1982-05-12 1983-03-23 Palpeur pour la détection de coutures Expired - Lifetime EP0093865B2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3217815A DE3217815C2 (de) 1982-05-12 1982-05-12 Abtastvorrichtung zur Ermittlung von Warenbahnnähten
DE3217815 1982-05-12

Publications (3)

Publication Number Publication Date
EP0093865A1 true EP0093865A1 (fr) 1983-11-16
EP0093865B1 EP0093865B1 (fr) 1986-12-30
EP0093865B2 EP0093865B2 (fr) 1991-03-13

Family

ID=6163352

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83102867A Expired - Lifetime EP0093865B2 (fr) 1982-05-12 1983-03-23 Palpeur pour la détection de coutures

Country Status (4)

Country Link
US (1) US4498240A (fr)
EP (1) EP0093865B2 (fr)
DE (2) DE3217815C2 (fr)
ES (1) ES8402038A1 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH671754A5 (fr) * 1986-09-24 1989-09-29 Grapha Holding Ag
GB2201243B (en) * 1987-02-19 1991-09-18 Heidelberger Druckmasch Ag Sheet processing apparatus
DE3705304A1 (de) * 1987-02-19 1988-09-01 Heidelberger Druckmasch Ag Vorrichtung zur messung von auf einer unterlage liegendem papier oder dergleichen
US5243408A (en) * 1991-07-17 1993-09-07 P. H. Glatfelter Company Method and apparatus for detecting web discontinuities
DE59205602D1 (de) * 1992-02-19 1996-04-11 Ferag Ag Doppelbogenerkennung
DE4232784C1 (de) * 1992-09-30 1994-05-05 Erhardt & Leimer Gmbh Verfahren und Vorrichtung zum Aufspüren von Metallteilchen
DE59403176D1 (de) * 1993-10-29 1997-07-24 Ferag Ag Verfahren und Vorrichtung zur Messung der Dicke von Druckereierzeugnissen, wie Zeitungen, Zeitschriften und Teilen hiervon
IT1318297B1 (it) * 2000-08-01 2003-07-28 Giuseppe Caccia Dispositivo per l'applicazione automatica di supporti protettivi salva cuciture, per tessuti e/o affini in movimento.
EP2923957A1 (fr) * 2014-03-26 2015-09-30 UHLMANN PAC-SYSTEME GmbH & Co. KG Dispositif d'adaptation de la commande d'une installation pour l'usinage de bandes de feuilles

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE924323C (de) 1953-07-25 1955-02-28 Menschner Textil Johannes Vorrichtung zur Ermittlung der Warenverbindungsnaht, insbesondere an zu scherenden Gewebebahnen
DE930442C (de) 1954-05-29 1955-07-18 Menschner Textil Johannes Verfahren zur Ermittlung der Warenverbindungsnaht, insbesondere an Schermaschinen
DE1268575B (de) 1963-04-19 1968-05-22 Appalachian Electronic Instr Einrichtung zur Ermittlung der Warenverbindungsnaht und zur Steuerung der Abhebevorrichtung der Bearbeitungswerkzeuge an Ausruestungsmaschinen
US3462568A (en) * 1967-07-19 1969-08-19 Deering Milliken Res Corp Seam detector apparatus
DE2336921A1 (de) * 1973-07-23 1975-01-30 Riggs & Lombard Inc Selbsteichender bzw. selbsteinstellender detektor zum feststellen von naehten o.dgl. bei laufenden stoffbahnen o.dgl
DE2428112A1 (de) * 1974-06-11 1976-01-02 Erhardt & Leimer Kg Nahtwaechter zur ermittlung von warenbahnnaehten
US4194659A (en) 1977-06-23 1980-03-25 Birch Brothers Southern, Incorporated Seam responsive rolls and method

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2798912A (en) * 1954-08-16 1957-07-09 Howard C Lindemann Slub detecting and locating apparatus
DE1066173B (fr) * 1955-03-25
US3316760A (en) * 1964-11-09 1967-05-02 Teledyne Inc Seam detector
DE1573912A1 (de) * 1965-05-24 1970-06-04 Laszlo Urmenyi Verfahren zum Erkennen von Oberflaechenerhoehungen im Papier und anderem plattenfoermigen Material und Einrichtung zur Ausuebung des Verfahrens
US3363458A (en) * 1966-02-11 1968-01-16 Cutler Hammer Inc Apparatus for detecting surface imperfections on moving webs
US3680215A (en) * 1970-10-30 1972-08-01 Black Clawson Co Continuous thickness measuring apparatus for veneer and other web material
JPS5677709U (fr) * 1979-11-21 1981-06-24
US4426785A (en) * 1982-01-04 1984-01-24 Loftus Peter J Method and apparatus for detecting abnormal thickness conditions such as folded and/or missing corners of moving sheets

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE924323C (de) 1953-07-25 1955-02-28 Menschner Textil Johannes Vorrichtung zur Ermittlung der Warenverbindungsnaht, insbesondere an zu scherenden Gewebebahnen
DE925884C (de) 1953-07-25 1955-03-31 Menschner Textil Johannes Verfahren zur Ermittlung der Warenverbindungsnaht, insbesondere an zu scherenden Gewebebahnen
DE930442C (de) 1954-05-29 1955-07-18 Menschner Textil Johannes Verfahren zur Ermittlung der Warenverbindungsnaht, insbesondere an Schermaschinen
DE1268575B (de) 1963-04-19 1968-05-22 Appalachian Electronic Instr Einrichtung zur Ermittlung der Warenverbindungsnaht und zur Steuerung der Abhebevorrichtung der Bearbeitungswerkzeuge an Ausruestungsmaschinen
US3462568A (en) * 1967-07-19 1969-08-19 Deering Milliken Res Corp Seam detector apparatus
DE2336921A1 (de) * 1973-07-23 1975-01-30 Riggs & Lombard Inc Selbsteichender bzw. selbsteinstellender detektor zum feststellen von naehten o.dgl. bei laufenden stoffbahnen o.dgl
DE2428112A1 (de) * 1974-06-11 1976-01-02 Erhardt & Leimer Kg Nahtwaechter zur ermittlung von warenbahnnaehten
DE2428112B2 (fr) 1974-06-11 1978-09-21 Erhardt & Leimer Kg, 8900 Augsburg
US4194659A (en) 1977-06-23 1980-03-25 Birch Brothers Southern, Incorporated Seam responsive rolls and method

Also Published As

Publication number Publication date
ES521627A0 (es) 1984-01-16
EP0093865B1 (fr) 1986-12-30
EP0093865B2 (fr) 1991-03-13
DE3368701D1 (en) 1987-02-05
DE3217815C2 (de) 1985-07-18
DE3217815A1 (de) 1983-11-24
ES8402038A1 (es) 1984-01-16
US4498240A (en) 1985-02-12

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