EP0263568A1 - Verfahren und Apparat zum Vereinzeln von flachen, biegsamen Gegenständen aus einem Magazin mit Hilfe eines Saugkopfes - Google Patents

Verfahren und Apparat zum Vereinzeln von flachen, biegsamen Gegenständen aus einem Magazin mit Hilfe eines Saugkopfes Download PDF

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Publication number
EP0263568A1
EP0263568A1 EP87201923A EP87201923A EP0263568A1 EP 0263568 A1 EP0263568 A1 EP 0263568A1 EP 87201923 A EP87201923 A EP 87201923A EP 87201923 A EP87201923 A EP 87201923A EP 0263568 A1 EP0263568 A1 EP 0263568A1
Authority
EP
European Patent Office
Prior art keywords
magazine
suction head
wheels
bent
front edge
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
EP87201923A
Other languages
English (en)
French (fr)
Other versions
EP0263568B1 (de
Inventor
Ernst Dahl Kragh
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.)
Thorsted Maskiner AS
Original Assignee
Thorsted Maskiner AS
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 Thorsted Maskiner AS filed Critical Thorsted Maskiner AS
Priority to AT87201923T priority Critical patent/ATE84279T1/de
Publication of EP0263568A1 publication Critical patent/EP0263568A1/de
Application granted granted Critical
Publication of EP0263568B1 publication Critical patent/EP0263568B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B65H3/00—Separating articles from piles
    • B65H3/08—Separating articles from piles using pneumatic force
    • B65H3/0808—Suction grippers
    • B65H3/085—Suction grippers separating from the bottom of pile
    • B65H3/0858—Suction grippers separating from the bottom of pile this action resulting merely in a curvature of each article being separated
    • B65H3/0866—Suction grippers separating from the bottom of pile this action resulting merely in a curvature of each article being separated the final separation being performed between rollers

Definitions

  • the present invention relates to a method for dispensing flexible sheets from a magazine by means of a suction device which is brought to pull out the foremost sheet in the magazine for delivering the sheet to a conveyor device.
  • the invention is based on the consideration that a high reliability of the individual taking out of flat members such as paper sheets, periodicals, cardboard sheets, newspapers etc. will be obtained by an active bending out of a relatively small width of an edge area of the foremost member, while the remainder thereof is supported by a front wall of the magazine, such a bending being effectable by means of guided sucking discs with a very small or no risk of the corresponding edge of the next member being bent outwards equally, as this will require a very unusual force of adhesion between the edge areas.
  • the edge area may be bent out past an inwardly protruding holder nose on the magazine along the free edge of the body, whereby an even greater reliability is obtained.
  • the bent-out edge area is brought to engagement with a drawing device which may draw out the remaining portion of the member from the magazine by a lateral, outwards drawing movement and deliver the member to suitable conveyor means.
  • the bent-out edge area may be brought into surface contact with a rotating drawer roller cooperating with a co-rotating dolly roller, but certain problems occur as to the introduction of the edge area between two such rollers upon a pure bending out of the edge area, and by the invention it is indicated how these problems may be solved in a simple manner. It has already been suggested that the sucking discs are swung outwards until the projecting front edge of the sheet member is caught by a pair of drawer rollers, and that the sucking discs are swung back after the drawing out of the sheet. However, for beginning the next operation cycle this return movement has to wait until the first sheet is entirely drawn out, which in practice implies a considerable delay in time.
  • the invention provides for a method by which the sucking discs may be brought to engage the sheet already before the previous sheet has been completely drawn out from the magazine.
  • a relevant dispenser is suggested in DE-B-1,084,278, in which a suction head is caused to swing out the front edge area of the sheet to a position in which it projects into a recess in a rotating disc arranged laterally of the sucking head, such that during further rotation of the disc an end wall of the recess will hit the sheet and draw it off the sucking head and then automatically guide the sheet and portion into a driving engagement between the periphery of the disc and a cooperating pressure roller.
  • the sucking head may be returned very soon, without waiting for the entire sheet to be pulled out, but an associated drawback is that the sucking head is subjected to a heavy wear by the said drawing off of the high number of consecutive sheets therefrom.
  • the sucking head of course, can be made by a rigid and wear resistant material, but only at the expense of the sheet gripping safety thereof. For that reason it is highly preferable to use a traditional semisoft suction disc.
  • sucking head is operationally released from the sheet just before the sheet is engaged by the said end wall of the recess in the rotating disc and then be moved ahead of the sheet and portion and retracted from the moving path thereof without being engaged by the sheet end portion.
  • the system shown in Fig. 1 consists of a magazine 2 for flat, bendable members 4, e.g. sheets or periodicals, which are desired to be delivered individually from the lower end of the magazine.
  • the majority of the bottom of the magazine is covered by a bottom plate 6, between the front edge of which and the front side of the magazine is left an open bottom portion 8, the front side of the magazine having, however, a lower, shortly backwardly projecting holder nose 10, which carries the front end of the members 4.
  • a row of sucking discs 14 which may cooperate with the exposed underside of the lowermost member 4 in the magazine pile, see also Fig. 2.
  • the carrier arms 12 are connected to a common carrier beam 16 which is arranged rigidly projecting from a connecting rod 18, which at its upper end is rotably connected with an excentric pivot 20 on a flywheel 22 which is kept in constant rotation by an axle 24.
  • the lower end of the connecting rod 18 has a laterally outwardly projecting pin 26 which cooperates with a guiding track 28 in a fixed guiding block 30 such that hereby the sucking discs are movable through a desired trajectory path for each rotation of the wheel 22. This trajectory is designated 32 in Fig. 2.
  • a row of wheels 34 is arranged on a common shaft 36, and in front of each of these wheels another row of wheels 40 of a larger diameter is placed on another common shaft 38.
  • the wheels 34 are entirely round while the wheels 40 are provided with a peripheral depression 42 between shoulder 44 and 46, of which the shoulder 44 leads from the outer wheel periphery 48 down to the depression 42, while the shoulder 46 leads from the depression 42 upwards or outwards to an intermediate peripheral level 50, which through a further shoulder 52 is led outwards to the outer periphery 48.
  • the outer periphery is located closely against the wheel 34, the distance between the shafts 36 and 38 being adaptable, in an adjustable or resilient manner, such that the individual members 4 may be squeezed in between the wheels 34 and 40.
  • the shaft 38 of the wheels 40 is rotated synchronically with the flywheel 22, while the axle 36 and thereby the wheels 34 may optionally be arranged in a freely rotatable manner.
  • the parts assume the positions shown in Fig. 2, in which the sucking discs 14 have just been brought to about the lower, foremost edge area of the lowermost member 4 in the magazine 2, while the depressions 42 of the wheels 40 are positioned right outside the lower front end of the magazine, while rotating in the rotation direction of the wheel 40 indicated by an arrow.
  • the sucking discs 14 are activated through the carrier arms 12, which are suction conduits connected with a non-illustrated vacuum source through a cyclical ly activated valve.
  • the sucking discs 14 are movable downwards along a first, arched partial portion I of the trajectory 32, whereby the sucking discs are rotated rearwards to the position indicated in dotted lines, being moved hereby as if they were rotated downwards about the front edge of the fixed magazine bottom plate 6.
  • a downwards drawing of the front end area of the lowermost member 4 is carried out, and the front area will be drawn down past the holding nose 10 and so as to be swung down about the front edge of the bottom plate 6.
  • the concerned swung-down position of the front edge area of the member 4 is indicated in full lines in Fig. 3. It is seen that the wheel 40 has at the same time been rotated to a position in which the depression 42 is brought inside the outer edge of the swung-down edge area, such that the down-swinging may continue slightly further without being obstructed by the wheels 40.
  • the outer circumference 48 of the wheels 40 naturally has to be sufficiently large for ensuring that a complete drawing out of the single members 4 from the magazine may be effected before a new operation cycle begins.
  • some downwardly projecting holder fingers 54 are placed at the front edge of the magazine, e.g. as indicated in dotted lines in Fig. 1.
  • These fingers which may consist of flat springs, are downwardly and backwardly projecting such that their lower ends are positioned just inside the movement path of the front edge of the member 4 when this is bent down during the first phase of the operation sequence. The front edge of the member 4 will thereby slip down underneath the holder fingers, as indicated in Fig.
  • the holder fingers 54 By using the holder fingers 54 the possibility of a continuous operation is thus obtained also by the handling of thick of semi-stiff objects, the suctation discs 14 being allowed to release the member and be led out in front of the front edge thereof before the front edge is caught by the shoulder 46 for further displacement by the shoulder 52.
  • suctation discs 14 remained in engagement with the front edge of the sheet member until the shoulder 46 reached this area, but in that case the suctation discs would have to be led hastily downwards after the release, whereby their movement would be inappropriately jerky and long, with corresponding requirements as to a high speed for the same cycle time.
  • suctation discs 14 For a desired rapid removal of the suction discs 14 from the front edge area of the member 4 it is appropriate that the suctation discs are guided in such a manner that they are not led downwards and outwards, but are simultaneously swung horizontally through a horizontal position as indicated by the sequence according to Figs. 3, 4 and 5, as the inwardly oriented edges of the suctation discs are hereby particularly quickly removed from the moving path of the front edge area of the member 4.
  • the desired movement characteristic for the sucmination discs may be obtained in a simple manner just by means of the control system illustrated in Fig. 1, but will be appreciated that a suitable guiding will also be obtainable by other means.
  • the carrier arms 12 of the suc Vietnamese discs are placed on a common carrier beam, which may also function as a vacuum connection, but in practice it may be preferred that the suctation discs have individual carrier and movement systems, preferably of the illustrated simple type, inasfar as it is hereby possible to operate the suction discs with a certain mutual phase displacement.
  • a possible alternative to the recess 50 will be a radial displacement by one of the wheels 34 or 40, such that these wheels (Fig. 5) are first kept slightly apart while the sucking head is removed from the area, and only thereafter are moved together for an effective drawing out of the member from the magazine.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sheets, Magazines, And Separation Thereof (AREA)
  • Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
  • Communication Control (AREA)
  • Supplying Of Containers To The Packaging Station (AREA)
EP87201923A 1986-10-08 1987-10-08 Verfahren und Apparat zum Vereinzeln von flachen, biegsamen Gegenständen aus einem Magazin mit Hilfe eines Saugkopfes Expired - Lifetime EP0263568B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87201923T ATE84279T1 (de) 1986-10-08 1987-10-08 Verfahren und apparat zum vereinzeln von flachen, biegsamen gegenstaenden aus einem magazin mit hilfe eines saugkopfes.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DK4790/86 1986-10-08
DK479086A DK479086D0 (da) 1986-10-08 1986-10-08 Fremgangsmaade og apparat til udtagning af baejelige fladeemner fra et magasin

Publications (2)

Publication Number Publication Date
EP0263568A1 true EP0263568A1 (de) 1988-04-13
EP0263568B1 EP0263568B1 (de) 1993-01-07

Family

ID=8136685

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87201923A Expired - Lifetime EP0263568B1 (de) 1986-10-08 1987-10-08 Verfahren und Apparat zum Vereinzeln von flachen, biegsamen Gegenständen aus einem Magazin mit Hilfe eines Saugkopfes

Country Status (5)

Country Link
EP (1) EP0263568B1 (de)
AT (1) ATE84279T1 (de)
DE (1) DE3783419T2 (de)
DK (1) DK479086D0 (de)
ES (1) ES2038652T3 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0574346A2 (de) * 1992-04-29 1993-12-15 Thorsted Maskiner A/S Vorrichtung zum Entstapeln für Bündel von gedruckten Papierblättern und ihre Anwendung

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE401933C (de) * 1922-10-13 1924-09-11 Harold Frank Warbey Bogenabfuerhrvorrichtung fuer Gummiermaschinen
DE1084278B (de) * 1957-12-31 1960-06-30 Richard Winkler Vorrichtung zur Entnahme von Einzelblaettern oder -bogen aus einem Stapel mit Hilfe eines gesteuert kippbaren Saugarms

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE401933C (de) * 1922-10-13 1924-09-11 Harold Frank Warbey Bogenabfuerhrvorrichtung fuer Gummiermaschinen
DE1084278B (de) * 1957-12-31 1960-06-30 Richard Winkler Vorrichtung zur Entnahme von Einzelblaettern oder -bogen aus einem Stapel mit Hilfe eines gesteuert kippbaren Saugarms

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0574346A2 (de) * 1992-04-29 1993-12-15 Thorsted Maskiner A/S Vorrichtung zum Entstapeln für Bündel von gedruckten Papierblättern und ihre Anwendung
EP0574346A3 (de) * 1992-04-29 1995-05-31 Thorsted Maskiner As Vorrichtung zum Entstapeln für Bündel von gedruckten Papierblättern und ihre Anwendung.

Also Published As

Publication number Publication date
EP0263568B1 (de) 1993-01-07
DE3783419D1 (de) 1993-02-18
DK479086D0 (da) 1986-10-08
ATE84279T1 (de) 1993-01-15
ES2038652T3 (es) 1993-08-01
DE3783419T2 (de) 1993-07-29

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