EP0173959B1 - Dispositif pour déposer des feuilles en pile - Google Patents

Dispositif pour déposer des feuilles en pile Download PDF

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Publication number
EP0173959B1
EP0173959B1 EP85110845A EP85110845A EP0173959B1 EP 0173959 B1 EP0173959 B1 EP 0173959B1 EP 85110845 A EP85110845 A EP 85110845A EP 85110845 A EP85110845 A EP 85110845A EP 0173959 B1 EP0173959 B1 EP 0173959B1
Authority
EP
European Patent Office
Prior art keywords
sheet
sheets
belt conveyor
suction belt
horizontal
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
EP85110845A
Other languages
German (de)
English (en)
Other versions
EP0173959A1 (fr
Inventor
Tadashi C/O Mihara Machinery Works Of Yano
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.)
Mitsubishi Heavy Industries Ltd
Original Assignee
Mitsubishi Heavy Industries Ltd
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 Mitsubishi Heavy Industries Ltd filed Critical Mitsubishi Heavy Industries Ltd
Publication of EP0173959A1 publication Critical patent/EP0173959A1/fr
Application granted granted Critical
Publication of EP0173959B1 publication Critical patent/EP0173959B1/fr
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H29/00—Delivering or advancing articles from machines; Advancing articles to or into piles
    • B65H29/26—Delivering or advancing articles from machines; Advancing articles to or into piles by dropping the articles
    • B65H29/32—Delivering or advancing articles from machines; Advancing articles to or into piles by dropping the articles from pneumatic, e.g. suction, carriers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2406/00—Means using fluid
    • B65H2406/30—Suction means
    • B65H2406/32—Suction belts
    • B65H2406/323—Overhead suction belt, i.e. holding material against gravity
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/10—Handled articles or webs
    • B65H2701/17—Nature of material
    • B65H2701/176—Cardboard
    • B65H2701/1762—Corrugated

Definitions

  • the present invention relates to a sheet stacker for stacking various sheet-like products such as corrugated fiberboards, cardboards, plastic sheets, or the like.
  • FIGS 6 and 7 of the accompanying drawings illustrate the principal arrangement of a conventional sheet stacker for stacking corrugated fiberboards to a prescribed height.
  • corrugated fiberboards 2 (hereinafter referred to simply as "sheets") of prescribed dimensions and shape which have been produced by a corrugated fiberboard manufacturing machine 1 are transferred one by one upwardly by an inclined belt conveyor 3.
  • the conveyor 3 is inclined at an angle of which is required to allow the sheets 2 to be stacked at a height A.
  • the inclined belt conveyor 3 is generally in the form of a suction conveyor having a conveyor belt 5 supporting the sheets 2 attracted to the surface thereof for preventing the sheets 2 from slipping with respect to each other as they are fed.
  • the speed V1 of travel of the conveyor belt 5 is selected to be lower than the speed V2 of movement of the sheets 2 through the machine 1. Therefore, the sheets 2 on the inclined belt conveyor 3 are partly overlapped.
  • the speed V1 of travel of the conveyor belt 5 is adjustable so as to be an optimum speed dependent on the length L of each sheet 2 and the speed of the sheets 2 through the machine 1.
  • the sheets 2 are successively fed from the inclined belt conveyor 3 onto a horizontal belt conveyor 6 which comprises a suction conveyor for attracting the sheets 2 upwardly.
  • a sheet stopper 7 Each sheet 2 transferred horizontally by the horizontal belt conveyor 6 is stopped by a sheet stopper 7.
  • the sheet 2-a stopped by the sheet stopper 7 is separated from the horizontal belt conveyor 6 by the following sheet 2-b as it moves in the direction of the arrow.
  • the separated sheet 2-a drops between the sheet stopper 7 and a confronting sheet guide 9 onto a vertically movable sheet table 8, which is successively lowered as the sheets 2 are successively stacked thereon.
  • the speed of descent of the sheet table 8 is automatically controlled dependent on the sheet thickness and the speed of travel of the sheets 2 on the belt conveyors so that the distance B between the lower run of the horizontal belt conveyor 6 and the upper surface of the uppermost sheet 2 of the stack will remain substantially constant.
  • the stack of the sheets 2 on the sheet table 8 reaches a prescribed height A
  • the supply of the sheets 2 from the machine 1 is stopped, and the stacked sheets 2 are fed rearwardly as shown in Figure 6.
  • the sheet table 8 is moved upwardly and stopped in a position just short of contact with the lower edge of the sheet stopper 7, the sheets 2 are supplied again from the machine 1.
  • the sheet table 8 is lowered again to discharge the stacked sheets 2, thus repeating the above cycle of operation.
  • each sheet 2 attracted to the horizontal belt conveyor 6 is separated off the horizontal belt conveyor 6 by the next sheet 2 and is caused to fall.
  • the sheets manufactured by the machine 1 is of a complex shape as shown in Figure 8
  • the sheets are apt to get caught by each other and jammed up as shown in Figure 9.
  • the involved sheets are damaged and a product loss takes place.
  • a sheet stacker of the kind defined in the preamble of Claim 1 is known from US-A-3 820 779.
  • the sheets attracted and conveyed by the suction belt conveyor of this known sheet stacker are separated one by one by means of the up-and-down movement of tines, which is in synchronism with the driving of a rotary die cutter.
  • the travel speed of the sheets is slowed down before they are separated by means of a Geneva wheel and the friction of a strip. All the tines act with the same timing against large and small sheets, therefore not allowing a truing-up of sheets of different lengths.
  • the invention allows for a control of the motion timing of the sheet separator of the sheet stacker in accordance with the length of the sheet, thereby enabling the sheets to be trued up properly independent of the sheet length.
  • FIG 1 shows a corrugated fiberboard manufacturing machine 1, an inclined belt conveyor 3, a horizontal belt conveyor 6, a sheet table 8, a sheet stopper 7, and a sheet guide 9 which are of the same arrangement as those shown in Figures 6 and 7.
  • the inclined belt conveyor 3 and the horizontal belt conveyor 6 are each composed of several independent suction belt conveyors, the number of which may vary dependent on the maximum width W ( Figure 2) of sheets 2 supplied.
  • the speeds. of travel of the belts of the belt conveyor 3, 6 are the same since their drive pulleys (as indicated at 11 in Figure 7) on a common drive shaft (as indicated at 10 in Figure 7) are of the same diameter.
  • the belt conveyors 3, 6 operate at the same speed V1.
  • the aforesaid basic construction is identical to that of the conventional sheet stacker.
  • the speed of operation of the belt conveyors 3, 6 is also variable to a desired speed dependent on the operation conditions.
  • the sheet stacker according to the present invention, shown in Figures 1 through 5, has a sheet separator as described below.
  • the sheet separator is installed on the horizontal belt conveyor 6.
  • the sheet separator 12 comprises a photoelectric sensor 13 positioned at the inlet of the horizontal belt conveyor 6, a drive motor 14, a drive gear 15 fixed to the shaft of the drive motor 14, a drive shaft 16, a drive gear 17 fixed to one end of the drive shaft 16 and held in mesh with the drive gear 15, a pair of bearings 18, 19 on which the drive shaft 16 is rotatably supported, a plurality of sprockets 20 fixedly mounted on the drive shaft 16 and disposed between the horizontal conveyor belts, a driven shaft 22 rotatably supported by a pair of bearings 25, 26 a plurality of sprockets 23 fixedly mounted on the driven shaft 22, a plurality of chains 21 trained around the sprockets 20, 23, and a plurality of sheet separation cams 24 fixed at intervals to the driven shaft 22 closely to the horizontal belt conveyor 6.
  • the drive motor 14 is controlled in its operation by a control device 27 in response to a signal from the photoelectric
  • each of the sheet separation cams 24 is movable below and above the lower run of the horizontal belt conveyor 6 as the cam 14 rotates.
  • the sheets 2 transferred by the inclined and horizontal suction belt conveyors 3, 6 are not partly overlapped, but are spaced from each other, with distances I kept between the leading and trailing ends of adjacent sheets. More specifically, the speed V1 of travel of the belt conveyors 3, 6 is selected to be higher than that of the belt conveyors in the conventional sheet stacker. If the speed of travel of the sheets on the belt conveyors were low with respect to the speed of the sheets in the machine 1, then the sheets would be overlapped on the belt conveyors.
  • the belt speed is adjusted dependent on the length L of each sheet 2 in order to optimize the intersheet distance I (normally in the range of from 50 to 100 mm) on the belt conveyors. The process of adjusting the belt speed will not be described as it has no direct bearing on the present invention. At any rate, it is important that the sheets be transferred separately at the distance I without being overlapped.
  • the sheets 2 are successively fed from the inclined belt conveyor 3 onto the horizontal belt conveyor 6.
  • the photoelectric sensor 13 at the inlet of the horizontal belt conveyor 6 detects the leading end of each sheet 2 and transmits a detected signal to the control device 27.
  • the sheet 2-a with its leading end having just passed the photoelectric sensor 13 is attracted upwardly and transferred by the horizontal belt conveyor 6.
  • the sheet separation cams 24 in the sheet separator 12 are rotated so that, immediately before the leading end of the sheet 2-a reaches the sheet stopper 7, the outer circumferential surfaces of the cams 24 depress the sheet 2-a off the horizontal belt conveyor 6.
  • the distance C between the sheet stopper 7 and the sheet guide 9 is selected in advance to be larger than the sheet length L by a certain clearance required to allow the sheets to drop freely.
  • the sheet separation cams 24 are rotated at all times by the drive motor 14 such that the cams 24 will make one revolution each time a sheet 2 is supplied to the horizontal belt conveyor 6. More specifically, upon detection of the leading end of the sheet 2-a by the photoelectric sensor 13, the sheet 2-a is separated from the horizontal belt conveyor 6 immediately before the leading end of the sheet 2-a reaches the sheet stopper 7. Just prior to arrival of the following sheet 2-b at the sheet separation cams 24, the sheet separation cams 24 are turned to an angular position in which they are held out of contact with the leading end of the sheet 2-b. Immediately before the leading end of the sheet 2-b fed by the horizontal belt conveyor 6 reaches the sheet stopper 7, the sheet 2-b is separated from the horizontal belt conveyor 6 by the sheet separation cams 24 and is caused to fall onto the sheet table 8.
  • the time it takes for the leading end of the sheet to reach the sheet stopper 7 after the leading sheet end has been detected by the photoelectric sensor 13 varies dependent on the operation speed or the speed of movement of the belt conveyors 3, 6.
  • the drive motor 14 is controlled in its rotation by this sensor, the photoelectric sensor 13, and the control device for rotating the sheet separation cams 24 through the illustrated power transmission mechanism.
  • the structure and operation of the sheet table 8 and the manner in which the sheets 2 falling on the sheet table 8 will be discharged remain the same as those of the conventional sheet stacker.
  • the sheets are depressed by the sheet separator at appropriate times so as to be separated from the suction belt conveyor and dropped downwardly. It is therefore not required to supply the sheets in overlapping relation to the horizontal belt conveyor. Accordingly, the sheets, even if they are of the complex as shown in Figure 8, are prevented from getting caught and jammed.
  • the sheet separator may be inactivated with the sheet separation cams stopped in an angular position out of contact with the sheets, and the speeds of operation of the horizontal and inclined belt conveyors may be lowered, so that the sheet stacker will operate in the same manner as that of the prior sheet stacker.
  • the sheets are forcibly separated from the upper or horizontal suction belt conveyor by the sheet separator in timed relation to the supply of the sheets to the upper suction belt conveyor. It is possible to drive the sheet separator from the machine 1, rather than the drive motor. Since the sheet separation cams should make one revolution each time a sheet is fed, the sheet separator may be coupled to the machine 1 through a suitable coupling means to enable the sheet separation cams to make one revolution each time a sheet is supplied from the machine 1.
  • the rotatable sheet separation cams may be replaced with vertically repro- catable mechanisms. While only one sheet separator is employed in the foregoing embodiment, a plurality of sheet separators may be arranged in the direction of travel of the sheets dependent on the size, rigidity, and other qualities of the sheets to be stacked.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Separation, Sorting, Adjustment, Or Bending Of Sheets To Be Conveyed (AREA)
  • Forming Counted Batches (AREA)
  • Pile Receivers (AREA)
  • Delivering By Means Of Belts And Rollers (AREA)
  • Making Paper Articles (AREA)

Claims (2)

1. Empileur de feuilles comprenant:
une table support de feuilles (8) qui supporte une pile de feuilles (2) sur sa face supérieure;
un transporteur aspirant horizontalement à couroie (6) disposé au-dessus de ladite table support de feuilles (8) et possédant une surface inférieure capable d'attirer les feuilles, pour transférer les feuilles qui sont acheminées en provenance d'un poste de traitement amont (1), et
un séparateur de feuilles (12) destiné à séparer les feuilles (2) une à une dudit transporteur aspirtant à courroie (6), caractérisé
par un détecteur (13) situé à l'entrée du transporteur horizontal aspirant à courroie (6) pour détecter l'extrémité avant de chaque feuille (2);
par un capteur sensible à la vitesse de déplacement du transporteur aspirant à courroie (6), et
par un dispositif de commande (27) qui répond aux signaux émis par ledit détecteur (13) et par ledit capteur de vitesse pour commander le séparateur de feuilles (12) de telle manière que chaque feuille soit séparée du transporteur aspirant horizontal à courroie (6) juste avant que l'extrémité avant de la feuille (2) atteigne le taquet d'arrêt des feuilles (7) qui est positionné à l'extrémité aval du transporteur aspirant à courroie (6), à une distance (C) du guide de feuilles amont (9), ladite distance (C) étant choisie de façon à être supérieure à la longueur (L) des feuilles d'une certaine marge qui est nécessaire pour permettre aux feuilles (2) de tomber librement.
2. Empileur de feuilles selon la revendication 1, caractérisé en ce que le séparateur de feuilles (12) comprend des cames (24) qui possèdent des surfaces circonférentielles extérieures excentrées par rapport au centre de rotation desdites cames, qui sont entraînées en rotation par des moyens d'entraînement (20-23) de faccon à se placer par intermittence dans le plan et hors du plan de la surface d'attraction des feuilles dudit transporteur aspirant à courroie (6), pour séparer ainsi la feuille correspondante (2) dudit transporteur (6).
EP85110845A 1984-08-30 1985-08-28 Dispositif pour déposer des feuilles en pile Expired EP0173959B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP59181596A JPS6160560A (ja) 1984-08-30 1984-08-30 シ−トスタツカ
JP181596/84 1984-08-30

Publications (2)

Publication Number Publication Date
EP0173959A1 EP0173959A1 (fr) 1986-03-12
EP0173959B1 true EP0173959B1 (fr) 1988-11-02

Family

ID=16103572

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85110845A Expired EP0173959B1 (fr) 1984-08-30 1985-08-28 Dispositif pour déposer des feuilles en pile

Country Status (3)

Country Link
EP (1) EP0173959B1 (fr)
JP (1) JPS6160560A (fr)
DE (2) DE173959T1 (fr)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0258505B1 (fr) * 1986-09-01 1991-05-08 The Ward Machinery Company Procédé et appareil pour empiler des coupes
EP0403886B1 (fr) * 1989-06-23 1993-09-01 Ferag AG Dispositif pour empiler des produits imprimés arrivant en formation imbriquée
FR2673170A1 (fr) * 1991-02-26 1992-08-28 Martin Sa Dispositif de transport et d'empilage d'objets plats.
US5160129A (en) * 1991-08-27 1992-11-03 Ward Holding Company, Inc. Sheet stacking
DE4316220A1 (de) * 1993-05-14 1995-01-26 Gremser Masch Franz Vorrichtung zum Ablegen von Bogen
US5882175A (en) * 1997-01-13 1999-03-16 Ward Holding Company Stacker for flexible sheets
JPH11255392A (ja) * 1998-03-09 1999-09-21 Isowa Corp シートスタッカのシート積上げ装置、サクションコンベア及びサクションベルト
DE10139218C1 (de) 2001-08-09 2003-04-24 Koenig & Bauer Ag Vorrichtung und ein Verfahren zur Ausrichtung von in einer Lage übereinander angeordneten Bogen
US7887040B2 (en) * 2009-01-09 2011-02-15 J & L Group International, Llc Sheet deceleration apparatus and method with kicker
ES2720126T3 (es) 2010-04-13 2019-07-18 Alliance Machine Systems Int Llc Aparato y método de desaceleración de hojas
EP2739553B1 (fr) 2011-08-04 2018-03-28 Alliance Machine Systems International, LLC Appareil et procédé d'empilement de matériau en feuille ondulée
CA2859802C (fr) 2011-12-28 2019-01-22 Curtis A. Roth Appareil et procede permettant d'empiler des articles
JP7217016B2 (ja) * 2019-09-20 2023-02-02 サンエンヂニアリング株式会社 シート材搬送装置

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1511266A1 (de) * 1966-07-22 1969-07-24 Paul Lippke Verfahren und Vorrichtung zum Foerdern und Ablegen bzw. zum Foerdern und Sortieren von Bogen aus Papier,Karton,Metallfolien od.dgl.
US3820779A (en) * 1972-04-24 1974-06-28 Deritend Eng Co Sheet delivery apparatus
US4157177A (en) * 1975-12-10 1979-06-05 Dr. Otto C. Strecker Kg. Apparatus for converting a stream of partly overlapping sheets into a stack
JPS5327983U (fr) * 1976-08-13 1978-03-09
JPS5957855A (ja) * 1982-09-24 1984-04-03 Uchida Yoko:Kk 給紙機の排紙集積装置

Also Published As

Publication number Publication date
JPS6160560A (ja) 1986-03-28
DE173959T1 (de) 1986-09-04
EP0173959A1 (fr) 1986-03-12
DE3565972D1 (en) 1988-12-08

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