EP0093865B1 - Palpeur pour la détection de coutures - Google Patents

Palpeur pour la détection de coutures Download PDF

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Publication number
EP0093865B1
EP0093865B1 EP83102867A EP83102867A EP0093865B1 EP 0093865 B1 EP0093865 B1 EP 0093865B1 EP 83102867 A EP83102867 A EP 83102867A EP 83102867 A EP83102867 A EP 83102867A EP 0093865 B1 EP0093865 B1 EP 0093865B1
Authority
EP
European Patent Office
Prior art keywords
detectors
fabric web
scanning apparatus
distance
seam
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.)
Expired
Application number
EP83102867A
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German (de)
English (en)
Other versions
EP0093865B2 (fr
EP0093865A1 (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
Application granted granted Critical
Publication of EP0093865B1 publication Critical patent/EP0093865B1/fr
Publication of EP0093865B2 publication Critical patent/EP0093865B2/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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, in particular shearing machines, the control of which is to be influenced when the seam is detected, with at least two detectors, which scan the web at a distance from one another and are arranged in and adjustable perpendicular to the web plane, each with one the probe can be placed on the material web, the signals generated being fed to a control circuit which only issues a control command to the machine control when at least two detectors, possibly at different times, deliver a signal which can be interpreted as a seam.
  • 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. B. to lift the shears at a seam passage from the web in a clipper and so to prevent damage to the clipper.
  • the invention is based on the preamble of claim 1 from a device as described for example in US-A-4194 659.
  • the detectors arranged opposite one another on the longitudinal edges of the web consist of electrical switches which are arranged on pivotable holders with respect to the web.
  • Such a switch detector has the disadvantage that it can only react to relatively large elevations on the web, which is due to the mechanics of such switches.
  • a switch is only able to report the two switching states «On and « Off. The result of this is that the known device is able to report only relatively strongly raised seams.
  • seam detection has been the subject of numerous considerations on a large scale.
  • B. DE-B-924 323 a device for determining a product seam, in which one side or both sides of the web an electrical conductor, for. B. in the form of a metallic thread, which causes a control pulse when touching two contacts connected to a control circuit.
  • a metal penetrating or superficially metallized textile thread DE-B-925884 proposes that the goods at the point to be considered, that is, usually at the seam, with a conductive liquid, for. B. a saline solution or weak acid to short-circuit the control circuit.
  • a Geiger tube is used as the seam detector, the fabric 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-B-2 428 112 deals with a seam monitor, in which a high-frequency probe is provided with a probe and at least one receiving device which is connected to an electrical conductor incorporated in the seam, e.g. B. appeals to a metal or stanol strip or a conductive film applied to the web.
  • the invention starting from a scanning device, in particular according to US-A-4 194 659, has the object of creating a device which is very simple in terms of its design, with which web seams of very small thickness can also be scanned and in which a simple one Calibration of the detectors is possible.
  • each detector consists of a potentiometer which is fixed to the machine with its resistance track, and the probe is arranged with little play on a coupling member 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 transversely to the web running direction next to one another in such a way that in each case the two detectors of a group are arranged transversely to the product web running direction and at a distance in fabric web running direction in the 'distance, it is further advantageous if each arranged on a transverse to the web running direction line detectors of both Groups each have the same distance from each other.
  • the control circuit essentially has 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.
  • the coupling member could be designed as a pivoting lever carrying the probe
  • 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 is preferably designed as a low-radial play roller at the end of the coupling member, so that against an otherwise possible design of the probe z. B. as a skid more favorable friction values and thereby in turn more accurate measured values.
  • the invention provides that two potentiometers with opposite polarity are connected to the control circuit in such a way that, with the same deflection of the probes of these two detectors, the total measuring 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 in each case are arranged together in a carrier which is adjustable with respect to the plane of the web, a simple adjustment is possible e.g. B. possible by adjusting the carrier in such a way that the measuring voltage is to be set to the value zero, which, for. B. can easily be done with the help of a simple voltmeter.
  • each carrier 11 for each detector 12 and 13 On a designated 10 frame of a web processing machine, for. B. a clipper, two carriers 11 for each detector 12 and 13 are arranged such that they are both adjustable in height (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 is arranged as a probe head 28.
  • a rod-shaped coupling member 26 on the free end of which a preferably roller-mounted roller 27 is arranged as a probe head 28.
  • 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 given when the scanning signals of these two detectors 12 and 13 coincide, i.e. H. 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 thus z. B. for paper web processing machines.
  • the arrangement described is less suitable for scanning such webs, the regular patterns, z. B. cross grooves or waffle pattern on the back (which is usually scanned).
  • Straight seams of such webs could, however, be scanned, for example, by arranging one of the two detectors 12 or 13 offset with respect to the other detector 13 or 12 in web direction 20. 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 goods running speed, the time period that a seam would at least need to reach the second detector 13 'has passed. 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.
  • 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 in such a way that the detectors 34 and 35 and the detectors 36 and 37 are at a distance 38 from one another in the direction of web travel 20 and in each case in the direction transverse to the web direction of travel Distance 39 are offset.
  • 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 web has unevenness, which in the device according to FIGS. 1 and 2, provided that it is in line with the detectors 12 and 13 or 13 ', that Detection of a straight seam would result.
  • 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 also be recognized with the device according to FIGS. 3 and 4.
  • the path / pulse generator 42 only has to ensure that unevenness of the material web which is too far apart in terms of time or distance may no longer be recognized as a seam.
  • the linking logic 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 at a later point in time corresponding 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 alignment of a detector group 32 or 33 is therefore possible in a simple manner by adjusting the total measuring 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)

Claims (9)

1. Appareil d'exploration pour la détection de coutures (23 ; 40 ; 40') de bande de matière dans des machines travaillant des bandes (19) de matière, en particulier des machines à tondre, sur la commande desquelles il faut agir lorsqu'une couture est détectée, muni d'au moins deux détecteurs (12, 13) explorant la bande de matière (19) à distance (30) l'un de l'autre et disposés de façon que l'on puisse les régler et modifier leur réglage perpendiculairement au plan de la bande de matière, présentant chacun une tête d'exploration (28) pouvant être posée sur la bande (19) de matière, les signaux engendrés étant délivrés à un circuit de commande qui donne alors uniquement un ordre de commande à la commande de machines si au moins deux détecteurs, éventuellement avec décalage de temps, fournissent un signal pouvant être interprété comme une couture, caractérisé par le fait que chaque détecteur (12, 13, 13', 34, 35, 36, 37) est formé d'un potentiomètre (24) dont la bande de résistance est disposée solidairement de la machine et que la tête d'exploration (28) est disposée avec peu de jeu sur un organe de couplage (26) qui est relié rigidement au contact glissant (25) du potentiomètre (24).
2. Appareil d'exploration selon la revendication 1, caractérisé par le fait que - dans une disposition en elle-même connue - deux détecteurs (12, 13) sont prévus à distance (30) l'un de l'autre transversalement à la direction de mouvement (20) de la bande de matière.
3. Appareil d'exploration selon la revendication 1, caractérisé par le fait que deux détecteurs (12, 13) sont disposés aussi bien à distance (30) l'un de l'autre transversalement à la direction (20) de mouvement de la bande de matière qu'à distance (31) l'un de l'autre dans la direction de mouvement (20) de la bande de matière.
4. Appareil d'exploration selon la revendication 2 ou 3, caractérisé par le fait que deux groupes (32 : 33) de deux détecteurs chaque fois (34, 35 ; 36, 37) sont disposés côte à côte transversalement à la direction de mouvement (20) de la bande de matière, de telle sorte que les deux détecteurs (24, 35 ; 36, 37) d'un groupe (32, 33) sont chaque fois disposés à distance (39) transversalement à la direction de mouvement (20) de la bande de matière et à distance (38) dans la direction de mouvement (20) de la bande de matière.
5. Appareil d'exploration selon la revendication 4, caractérisé par le fait que les détecteurs (34, 36 ; 35, 37) des deux groupes (32 ; 33) chaque fois disposés sur une droite située transversalement à la direction de mouvement (20) de la bande de matière présentent entre eux chaque fois la même distance (46).
6. Appareil d'exploration selon les revendications 1 à 5, caractérisé par le fait que le potentiomètre (24) présente un contact glissant (25) pouvant se mouvoir en ligne droite et que l'organe de couplage (26) réalisé pratiquement en forme de tige s'étend dans la direction de mouvement du contact glissant (25).
7. Appareil d'exploration selon la revendication 6, caractérisé par le fait que la tête d'exploration (28) est conçue sous forme de galet palpeur (27) monté sur palier à roulement avec peu de jeu à l'extrémité de l'organe de couplage (26).
8. Appareil d'exploration selon l'une des revendications précédentes, caractérisé par le fait que les potentiomètres (24) de deux détecteurs (34, 35 ; 35, 36) à la fois sont raccordés avec une polarité opposée au circuit de commande (29), de telle sorte que, pour une déviation égale des têtes d'exploration (28) des deux détecteurs (34, 35 ; 36, 37), la tension totale de mesure est égale à zéro.
9. Appareil d'exploration selon l'une des revendications précédentes, caractérisé par le fait que les potentiomètres (24) d'un groupe (32 ; 33) chaque fois, ou tous les potentiomètres (24), sont disposés en commun sur un support (11) réglable relativement au plan de la bande de matière.
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 EP0093865A1 (fr) 1983-11-16
EP0093865B1 true 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) ES521627A0 (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
DE3705304A1 (de) * 1987-02-19 1988-09-01 Heidelberger Druckmasch Ag Vorrichtung zur messung von auf einer unterlage liegendem papier oder dergleichen
GB2201243B (en) * 1987-02-19 1991-09-18 Heidelberger Druckmasch Ag Sheet processing apparatus
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
EP0651231B1 (fr) * 1993-10-29 1997-06-18 Ferag AG Procédé et dispositif pour mesurer l'épaisseur de produits d'imprimerie, comme des journaux, des revues ou similaires
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

Family Cites Families (15)

* 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
US2798912A (en) * 1954-08-16 1957-07-09 Howard C Lindemann Slub detecting and locating apparatus
DE1066173B (fr) * 1955-03-25
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
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
US3462568A (en) * 1967-07-19 1969-08-19 Deering Milliken Res Corp Seam detector apparatus
US3680215A (en) * 1970-10-30 1972-08-01 Black Clawson Co Continuous thickness measuring apparatus for veneer and other web material
FR2238003B1 (fr) * 1973-07-23 1980-04-04 Riggs & Lombard Inc
DE2428112C3 (de) * 1974-06-11 1979-05-10 Erhardt & Leimer Kg, 8900 Augsburg Nahtwächter zur Ermittlung von lYarenbahnniUiten
US4194659A (en) 1977-06-23 1980-03-25 Birch Brothers Southern, Incorporated Seam responsive rolls and method
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

Also Published As

Publication number Publication date
ES8402038A1 (es) 1984-01-16
ES521627A0 (es) 1984-01-16
US4498240A (en) 1985-02-12
EP0093865B2 (fr) 1991-03-13
DE3368701D1 (en) 1987-02-05
DE3217815A1 (de) 1983-11-24
DE3217815C2 (de) 1985-07-18
EP0093865A1 (fr) 1983-11-16

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