EP0002653A1 - Dispositif pour faire progresser le bord d'attaque d'une bande à travers une machine de traitement de bande - Google Patents

Dispositif pour faire progresser le bord d'attaque d'une bande à travers une machine de traitement de bande Download PDF

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Publication number
EP0002653A1
EP0002653A1 EP78100047A EP78100047A EP0002653A1 EP 0002653 A1 EP0002653 A1 EP 0002653A1 EP 78100047 A EP78100047 A EP 78100047A EP 78100047 A EP78100047 A EP 78100047A EP 0002653 A1 EP0002653 A1 EP 0002653A1
Authority
EP
European Patent Office
Prior art keywords
clamping
clamping pieces
sheet
pieces
wedge gap
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.)
Withdrawn
Application number
EP78100047A
Other languages
German (de)
English (en)
Inventor
Hans-Jörg Weinzinger
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.)
Voestalpine AG
Original Assignee
Voestalpine AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Voestalpine AG filed Critical Voestalpine AG
Publication of EP0002653A1 publication Critical patent/EP0002653A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B39/00—Arrangements for moving, supporting, or positioning work, or controlling its movement, combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B39/02—Feeding or supporting work; Braking or tensioning arrangements, e.g. threading arrangements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H20/00—Advancing webs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H20/00—Advancing webs
    • B65H20/16—Advancing webs by web-gripping means, e.g. grippers, clips
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H5/00—Feeding articles separated from piles; Feeding articles to machines
    • B65H5/08—Feeding articles separated from piles; Feeding articles to machines by grippers, e.g. suction grippers
    • B65H5/14—Details of grippers; Actuating-mechanisms therefor

Definitions

  • the invention relates to a retraction device for a strip processing system with two clamping pieces for the beginning of the strip running transversely to the drawing direction and with two tensioning devices acting laterally on the clamping pieces and connected to a traction means.
  • pull-in devices are used, with the help of which the clamped band beginning can be pulled between the individual rolls and rollers of the stands.
  • two clamping rollers are provided in a known retraction device (OE-PS 248 364), which are eccentrically supported at the ends in a common frame and clamp the beginning of the tape between them by mutual rotation, so that the tape thus clamped with the help of the bearing frame connected traction means can be pulled between the red or rollers of the respective stands of the processing system.
  • the pinch rollers which are connected at the end via a pair of gearwheels, can be rotated in opposite directions by means of an adjusting lever which, when this clamping device is pulled through, abuts against a fixed starting curve and inevitably through this Clamping sense of the pinch rollers is actuated.
  • a disadvantage of this known device is that due to the eccentric clamp design, a comparatively large overall height of the clamping device is required, which requires a particularly wide opening possibility of the scaffolding.
  • only a clamping force that is independent of the applied tensile force can be achieved, which for a given rotation angle of the eccentric clamp also depends on the thickness of the band to be clamped.
  • the invention is therefore based on the object to avoid these deficiencies and to improve a retraction device of the type described in such a way that, at a low overall height with simple constructional means, a secure clamping of the beginning of the strip which is dependent on the strip tension but independent of the strip thickness is automatically guaranteed.
  • the invention achieves the stated object in that the clamping pieces consisting of pressure beams are articulated to one another in the region of their front longitudinal edges with respect to the drawing-in direction and are displaceably mounted in the tensioning devices in the drawing-in direction and in that the tensioning devices have a wedge gap tapering counter to the drawing-in direction for receiving laterally have locking cams attached to the clamping pieces.
  • clamping pieces designed as pressure bars have lateral locking cams that are pressed into the wedge gap when there is a relative displacement between the clamping pieces and the tensioning devices, there is an automatic clamping of the beginning of the tape located between the two clamping pieces because initially only the tensioning devices are over the traction means are moved.
  • the Clamping pieces are mounted displaceably with respect to the clamping devices, so that the closing cams of the clamping pieces penetrate into the wedge gap of the clamping devices and are pressed against each other by the resulting relative movement, which leads to a pincer-like closing of the clamping pieces due to the articulated connection of the clamping pieces.
  • the band is pulled along with the tensioning devices .
  • the wedge gap causes an increase in the clamping force when a greater tensile force has to be transmitted to the tape, so that it is impossible for the beginning of the tape to slip out of the clamping device.
  • the closing width of the clamping pieces depends only on the depth of penetration of the locking cams into the wedge gap of the tensioning devices, i.e. on the free displacement path of the clamping pieces relative to the tensioning device.
  • an opening cam is provided on both sides of the upper clamping piece with respect to the direction of retraction in front of the closing cam in a further embodiment of the invention, with an increasing guide surface of the respective clamping device in the direction of retraction interacts, the in the pulling direction measured distance between the closing cam and the opening cam is smaller than the corresponding distance of the entry opening of the wedge gap from the contact point of the opening cam on the guide surface. If, in order to open the clamping pieces, the tensioning devices are adjusted against the clamping pieces in the opposite direction of pulling out, the clamping force is first released by pulling the locking cams out of the wedge gap.
  • a particularly simple construction is obtained in a further embodiment of the invention in that the closing cams of the lower clamping piece are designed as sliding pieces which are mounted in a guide of the tensioning devices which is parallel to the drawing-in direction and which carries the two clamping pieces.
  • This measure makes separate supports of the clamping pieces for their displaceability with respect to the clamping devices unnecessary, because the clamping pieces can be fully supported on the clamping devices via the sliding pieces acting as abutments when closing the clamping pieces.
  • the closing cams of the upper clamping piece are shaped with respect to their surface interacting with the wedge gap according to the jacket of a circular cylinder lying parallel to the hinge axis of the clamping pieces, then the same contact and frictional relationships always result between these closing cams and the corresponding wedge surface of the wedge gap , no matter how far the clamping pieces are pressed against each other due to different tape thicknesses.
  • one of the clamping pieces distributed over its length against the other clamping piece can bear spring-loaded pressure plates which act on the beginning of the band to be clamped, so that deflections of the clamping pieces can be compensated for due to the resilient support of these pressure plates.
  • the provision of these spring-loaded pressure plates also offers the possibility of securely clamping strips divided into longitudinal strips, although different thicknesses of the individual partial strips must be expected.
  • the pull-in device shown consists of two clamps running transversely to the pull-in direction Pieces 1 and 2 for the beginning of the tape 3 and two clamping devices 4 provided laterally on these clamping pieces 1 and 2, which can be pulled through the scaffolding of the tape processing system, not shown, via a traction means 5, for example a chain, a rope or tape.
  • the clamping pieces 1 and 2 are designed as pressure beams and are articulated to one another in the region of their longitudinal edges which are at the front with respect to the drawing-in direction.
  • the joints are designated 6 in the drawing. Because of these joints 6, the beginning of the band 3 can be clamped between the clamping pieces 1 and 2 in the manner of pliers, as is illustrated in FIG. 4.
  • the lower clamping piece 2 has laterally protruding sliding pieces 7, which each engage in a guide 8 of the tensioning devices 4 parallel to the pulling-in direction and the two clamping pieces 1 and 2 in the tensioning devices 4 are displaceably mounted in the pulling-in direction.
  • Closing cams 9 are attached laterally to the upper clamping piece 1, which, with the sliding pieces 7 serving as abutments and thus also as closing cams, are inserted into a wedge gap 10 of the clamping devices with a relative displacement of the clamping devices 4 with respect to the clamping pieces 1 and 2, so that the gap between the Band pieces 3 located clamps is clamped between the clamps 1 and 2.
  • Fig. 4 shows this fact clearly.
  • the clamping devices which are designed as wedge gears, which are actuated by the traction means 5
  • the surfaces 11 of the locking cams 9 are shaped according to the jacket of a circular cylinder lying parallel to the hinge axis of the clamping pieces.
  • the upper clamping piece 1 is also provided with laterally projecting opening cams 12 which lie in front of the closing cams 9 with respect to the pull-in direction and are at a distance from the latter in the pull-in direction which is smaller than that Corresponding distance of the inlet opening of the wedge gap from the contact point of the opening cam on its cooperating guideway 13, which increases in the drawing-in direction, so that with a corresponding relative displacement between the clamping pieces 1 and 2 and the clamping devices 4, the upper clamping piece 1 is pivoted up, as this Fig.3 shows.
  • the opening angle of the wedge gap 10 must of course be selected as a function of the friction factors which occur, in order to prevent the locking cams 7, 9 from being pushed out of the wedge gap 10 independently.
  • An opening angle of less than or equal to 5 ° will usually take these conditions into account.
  • the clamping force must be able to be applied regardless of the deflection of the clamping pieces 1, 2 and any differences in thickness of the tapes.
  • several pressure plates 14 can be stored in one of the two clamping pieces distributed over its length, which are pressed by means of springs 15 against the other clamping piece and thus compensate for deflections of the clamping pieces and differences in thickness over the width of the band.
  • screws 16 are provided for mounting these pressure plates 14.
EP78100047A 1977-12-20 1978-06-01 Dispositif pour faire progresser le bord d'attaque d'une bande à travers une machine de traitement de bande Withdrawn EP0002653A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT910377A AT354390B (de) 1977-12-20 1977-12-20 Einziehvorrichtung fuer eine bandbearbeitungs- anlage
AT9103/77 1977-12-20

Publications (1)

Publication Number Publication Date
EP0002653A1 true EP0002653A1 (fr) 1979-07-11

Family

ID=3611218

Family Applications (1)

Application Number Title Priority Date Filing Date
EP78100047A Withdrawn EP0002653A1 (fr) 1977-12-20 1978-06-01 Dispositif pour faire progresser le bord d'attaque d'une bande à travers une machine de traitement de bande

Country Status (2)

Country Link
EP (1) EP0002653A1 (fr)
AT (1) AT354390B (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999030898A1 (fr) * 1997-12-12 1999-06-24 Interfic Engineering Limited Appareil et procede pour la fabrication de carton

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE404909C (de) * 1924-10-24 Preusse & Co Akt Ges Bogenziehmarke fuer Schnellpressen, Falzmaschinen und aehnliche Maschinen
US1525122A (en) * 1924-06-05 1925-02-03 Pittsburgh Plate Glass Co Sheet-glass clamp
DE739168C (de) * 1932-05-31 1943-09-13 Margarete Gerbert Transportzange fuer Vorschubapparate an Pressen, Stanzen o. dgl.
US2418065A (en) * 1940-10-16 1947-03-25 Bobst Henri Blank feeding means
US2702929A (en) * 1951-07-26 1955-03-01 Rohr Aircraft Corp Clamp
DE1078075B (de) * 1957-02-02 1960-03-24 Hydraulik Gmbh Spanneinrichtung fuer Bleche und Platten, insbesondere an Reckmaschinen
FR1358416A (fr) * 1963-01-12 1964-04-17 Dispositif de transport et de manutention automatique de matière en feuilles ou en plaques
AT248364B (de) * 1964-10-12 1966-07-25 Voest Ag Einziehvorrichtung für Bandmaterial bearbeitende Anlagen
US3638909A (en) * 1970-11-13 1972-02-01 Herbert Oliver Richard Dew Gripping means
DE2604909B1 (de) * 1976-02-07 1976-09-09 Sundwiger Eisen Maschinen Vorrichtung zum lagerichtigen Transport von Bandanfaengen aufzuwickelnder Metallbaender zu einer Haspeltrommel

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE404909C (de) * 1924-10-24 Preusse & Co Akt Ges Bogenziehmarke fuer Schnellpressen, Falzmaschinen und aehnliche Maschinen
US1525122A (en) * 1924-06-05 1925-02-03 Pittsburgh Plate Glass Co Sheet-glass clamp
DE739168C (de) * 1932-05-31 1943-09-13 Margarete Gerbert Transportzange fuer Vorschubapparate an Pressen, Stanzen o. dgl.
US2418065A (en) * 1940-10-16 1947-03-25 Bobst Henri Blank feeding means
US2702929A (en) * 1951-07-26 1955-03-01 Rohr Aircraft Corp Clamp
DE1078075B (de) * 1957-02-02 1960-03-24 Hydraulik Gmbh Spanneinrichtung fuer Bleche und Platten, insbesondere an Reckmaschinen
FR1358416A (fr) * 1963-01-12 1964-04-17 Dispositif de transport et de manutention automatique de matière en feuilles ou en plaques
AT248364B (de) * 1964-10-12 1966-07-25 Voest Ag Einziehvorrichtung für Bandmaterial bearbeitende Anlagen
US3638909A (en) * 1970-11-13 1972-02-01 Herbert Oliver Richard Dew Gripping means
DE2604909B1 (de) * 1976-02-07 1976-09-09 Sundwiger Eisen Maschinen Vorrichtung zum lagerichtigen Transport von Bandanfaengen aufzuwickelnder Metallbaender zu einer Haspeltrommel

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999030898A1 (fr) * 1997-12-12 1999-06-24 Interfic Engineering Limited Appareil et procede pour la fabrication de carton

Also Published As

Publication number Publication date
ATA910377A (de) 1979-06-15
AT354390B (de) 1980-01-10

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Inventor name: WEINZINGER, HANS-JOERG