US3466028A - Apparatus for feeding sheets from a stack to a processing machine - Google Patents

Apparatus for feeding sheets from a stack to a processing machine Download PDF

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Publication number
US3466028A
US3466028A US647501A US3466028DA US3466028A US 3466028 A US3466028 A US 3466028A US 647501 A US647501 A US 647501A US 3466028D A US3466028D A US 3466028DA US 3466028 A US3466028 A US 3466028A
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US
United States
Prior art keywords
stack
sheets
processing machine
sheet
feeding
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Expired - Lifetime
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US647501A
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English (en)
Inventor
Fernand Bays
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VIDOSA
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VIDOSA
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D43/00—Feeding, positioning or storing devices combined with, or arranged in, or specially adapted for use in connection with, apparatus for working or processing sheet metal, metal tubes or metal profiles; Associations therewith of cutting devices
    • B21D43/20—Storage arrangements; Piling or unpiling
    • B21D43/24—Devices for removing sheets from a stack
    • 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
    • B65H3/0816—Suction grippers separating from the top of pile
    • B65H3/0825—Suction grippers separating from the top of pile and acting on the rear part of the articles relatively to the final separating direction
    • 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
    • B65H3/36—Separating articles from piles by separators moved in special paths, e.g. enclosing an area
    • B65H3/38—Separating articles from piles by separators moved in special paths, e.g. enclosing an area the paths not enclosing an area

Definitions

  • Power driven guide means typically in the form of quadrangular or quadrilaterial guide linkage arrangements, cooperate with the aforementioned cross-beam for displacing the sheet lifting means.
  • the latter during displacement, conjointly carry out a substantially curve-shaped work stroke consisting of a vertical component and a horizontal component, wherein the uppermost sheet of the stack arrives between the aforesaid transport rolls at the end of such work stroke.
  • the present invention relates to an improved apparatus for feeding or transporting individual sheets or the like from a stack to a processing machine.
  • the inventive apparatus is generally of the type comprising a number of lifting elements for the sheets arranged above the sheet stack, and further includes at least two transport rolls arranged downstream of such stack in the direction of withdrawal of the individual sheets therefrom, with the sheets being movable between and through the aforesaid transport rolls.
  • Apparatuses of this type serve for transporting or feeding sheet metal plates, paper sheets, cardboard sheets, or similar flat or strip-like material, to the shears, punches or die cutters, power presses, printing presses or similar processing machines.
  • sheets is used in its broader sense to generally encompass substantially flat material which can be placed in stack-like configuration.
  • Another, more specific object of the present invention relates to an improved apparatus of the aforementioned type which is capable of operating at increased speed and is particularly suitable for handling most types of sheet material, even relatively large sheet metal plates or the like.
  • Still a further significant object of this invention relates to an improved apparatus for feeding sheets from a stack in a controlled manner into a desired processing machine, operating at relatively high speed, capable of handling, without damage, the material which is to be fed, manifesting itself through its relatively inexpensive and uncomplicated construction, thereby assuring against undue breakdown and malfunction while permitting ease of operation.
  • Yet a further important object of this invention relates to an improved feed apparatus for transporting individual sheets from a stack from one location to a further desired location in a highly eflicient manner and with a minimum of lost time.
  • the inventive apparatus is broadly manifested by the features that the lifting elements or means for the sheets are arranged at a crossbeam which is mounted to be longitudinally displaceable. Further, the aforementioned lifting elements or means can be displaced through the agency of power-driven guide means, in the form of so-called quadrangular or quadrilateral guide linkage arrangements disposed in substantially parallelogram configuration. As a result, the lifting means for the sheets, during such displacement, conjointly carry out a substantially curve-shaped wor-k stroke composed of a vertical component and a horizontal component, wherein the uppermost sheet of the stack arrives between the transport rolls at the end of such work stroke.
  • the sheet lifting means are moved along a substantially curve-shaped path so that, in each instance, the uppermost sheet of a stack is displaced in the feed or transport direction. Consequently, the thus displaced uppermost sheet arrives between the transport rolls and owing to the action of the latter is further conveyed or transported.
  • Such motion cycle and the return movement can take place considerably quicker than two successive movements in directions disposed transverse to one another.
  • FIGURE 1 schematically illustrates a side view of a preferred embodiment of inventive apparatus in operable association with a stack of sheet-like material
  • FIGURE 2 schematically depicts, in side view, the suction cups in operable association with the guide means in the form of quadrangular or quadrilateral guide linkage arrangements, and in a lowered position upon the stack;
  • FIGURE 3 schematically depicts the suction cups and associated guide means of FIGURE 2 in the raised position engaging the uppermost sheet of the stack and feeding such into the transport or feed rolls;
  • FIGURE 4 schematically illustrates a plan view of the apparatus of FIGURE 1.
  • the exemplary embodiment of inventive apparatus incorporates a frame structure 1 having bearing blocks 2 and two pairs of transportor withdrawal rolls 3 and 4 which rotate in the direction of the indicated arrows of FIG- URE 1.
  • location A represents the front of the machine whereas the other location designated B represents the rear thereof.
  • Identical rod members 5 which are disposed in tandem, in other words behind one another, are sup ported by the bearing blocks 2.
  • a suitable sled member 6 is mounted to be horizontally displaceable, in the direction of the double-headed arrow 7, upon such rod members 5.
  • This sled member 6 carries the unit or equipment by means of which it is possible to always displace the uppermost sheet, such as sheet 32, of the stack 29 in the transport or feed direction, which, in this case, would be at the right end of the machine towards location B and the transport rolls 3, 4.
  • this sled member 6 is equipped with a substantially horizontal cross-beam 8.
  • a plurality of downwardly depending suction cups 9 are mounted at such cross-beam 8. These suction cups 9 are disposed in a row behind one another, wherefore in FIGURES 1 to 4 only the forwardmost suction cup is visible.
  • a web or bracket member 10 is secured at the central region of the cross-beam 8 and to which there is hingedly connected a piston rod 11. The latter carries a piston 12 which can be displaced to and fro in a suitable pressure cylinder 13.
  • This pressure cylinder 13 is supported at the sled member 6 by means of a bearing or support bracket 14 (FIGURE 1) and can be rocked about the hinge location 15 with respect to the bearing bracket 14.
  • a respective guide means is disposed at each end of the cross-beam 8.
  • the control links 16 and 17 of each such guide means 40 are pivotable about the pivot pins 18 and 19 respectively, as best seen by referring to FIGURES 2. and 3.
  • These pivot pins 18 and 19 are embedded or otherwise afiixed at the horizontally displaceable sled member 6.
  • the cross-beam 8 and a respective bracket 20 afiixed thereto serves as the connecting element for each quadrilateral guide linkage arrangement 40.
  • the hinge connection of the bracket 20 and the cross-beam 8 to the control links 16 and 17 respectively is undertaken through the agency of suitable journal pins 21 and 22 respectively (FIGURE 2).
  • the guide means 40 in the form of the quadrangular or quadrilateral guide linkage arrangements are constructed as so-called parallelogram guides. This, in effect, means that the spacing of the pins 18 and 19 is equal to the spacing of the pins 21 and 22, and further, that the spacing of the pins 18 and 21 is equal to the spacing of the pins 19 and 22. Owing to this parallelogram guide arrangement the underface or bottom of the suction cups 9 remains continuously horizontal during their substantially arc-shaped pivoting or rocking about the pins 18.
  • FIGURES 2 and 3 depict the position of the quadrilateral guide linkage arrangements 40 in both terminal positions. Since in these terminal positions the control links 16 and 17 are at the region of their dead-center positions, it is advantageous to employ elastic elements 23 and 24, for instance coil springs, which in the respective terminal positions of the control links 16 and 17 are alternately pre-stressed and serve to assist such control links, during a reversal in movement, to move away from their dead-center position.
  • elastic elements 23 and 24 for instance coil springs
  • an elevationally displaceable table means 25 is provided beneath the cross-beam 8.
  • This table means 25 is guided by vertical columns 26 and can be selectively raised and lowered by means of a pressurized fluid medium operated piston unit 27. Further, as shown in FIGURE 1, a pallet 28 with a stack of sheets 29 is located upon the table means 25.
  • the sheets do not consist of a magnetic material, for instance are formed of aluminum, paper or cardboard then stack separation is undertaken by compressed air which flows through suitable nozzles in the conventional manner.
  • the magnet beam 34 is equipped with both separating magnets as well as compressed air nozzles.
  • the electric conductors running to the individual units also the hydraulic or pneumatic conduits for the pistons 12 and 27 as well as for the suction cups 9, particularly since such structure can be conventional and does not form part of the subject matter of the present invention.
  • the mode of operation of the heretofore described exemplary embodiment of inventive apparatus is a follows: After depositing a stack of sheets 29 or the like by means of the pallet 28 upon the table means 25 the latter is sufficiently elevated so that the uppermost sheet 32 is situated approximately at the height between the rollers of each pair of transport rolls 3 and 4.
  • the carriage or sled member 6 is displaced along the horizontal rod members 5 in such a manner that the magnet beam 30 is situated at a spacing of several millimeters from the rear of the stacked sheets.
  • a suitable pressure medium impinges against the face 12a of the piston member 12 which is connected with the piston rod 11 so that the piston member 12 is displaced into the position shown in FIGURE 3, in other words moves towards the right upper end of the associated cylinder 13. Consequently, the guide means 40 in the form of the previously considered quadrangular or quadrilateral guide linkage arrangements displace the cross-beam 8 along a curve. As a result the uppermost sheet 32 is now raised by the suction cups 9 and displaced in the direction towards the pair of transport or withdrawal rolls 3 to such an extent that it is engaged by the latter and removed from the remainder of the stack 29.
  • This sheet 32 for instance a sheet metal plate, can then be placed upon a table 33, at which location this sheet 32 is further processed or conveyed to another desired location.
  • air is admitted into the non-illustrated suction conduit leading to the cross-beam 8, so that the suction cups 9 disengage from the previously held uppermost sheet 32. The latter then falls back onto the stack 29 and bears upon such, yet is withdrawn in sliding fashion over such stack since it is seized by the transport rolls 3, 4.
  • the suction cups 9 are disposed at the forward edge of the stack 29 in other words at the location A which is considered the front of the machine, since here it is possible to carry out in the simplest and quickest manner the raising of the uppermost sheet 32. Additionally, by virtue of this arrangement it will be appreciated that the suction cups 9 can be pivoted back from the position of FIGURE 3 into the position of FIGURES 1 and 2 even when the previously withdrawn uppermost sheet still bears upon the right hand portion of the stack 29 of FIGURE 2 and is still engaged by the transport rolls 3, 4.
  • the table means 25 is therefore moved upwardly, by a known elevating or lifting mechanism, by an amount equal to the degree of such reduction in the stack height.
  • the control of this movement of the table means 25 can, for instance, take place such that after the stack height has decreased an amount equal to about 2 to 4 millimeters the table means 25 is then raised by such amount.
  • the table means 25 is moved downwardly and is again in position ready to receive a new stack 29.
  • Apparatus for feeding individual sheets from a stack of such sheets to a processing machine comprising:
  • At least two transport rolls arranged downstream of said stack in the direction of withdrawal of the individual sheets therefrom, said sheets being movable between said transport rolls;
  • a cross-beam mounted to be longitudinally displaceable at which are arranged said sheet lifting means; power-driven guide means cooperating with said crossbeam for displacing said sheet lifting means;
  • said sheet lifting means during such displacement conjointly carrying out a substantially curve-shaped work stroke composed of a vertical component and a horizontal component, the uppermost sheet of the stack arriving between said transport rolls at the end of said work stroke.
  • each of said substantially quadrangular guide linkage arrangements is composed of linkage means arranged in substantially parallelogram configuration.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sheets, Magazines, And Separation Thereof (AREA)
US647501A 1966-06-24 1967-06-20 Apparatus for feeding sheets from a stack to a processing machine Expired - Lifetime US3466028A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH915266A CH442141A (de) 1966-06-24 1966-06-24 Vorrichtung zum Transport einzelner Tafeln von einem Stapel zu einer Verarbeitungsmaschine

Publications (1)

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US3466028A true US3466028A (en) 1969-09-09

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US647501A Expired - Lifetime US3466028A (en) 1966-06-24 1967-06-20 Apparatus for feeding sheets from a stack to a processing machine

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US (1) US3466028A (de)
CH (1) CH442141A (de)
DE (2) DE1531086A1 (de)
GB (1) GB1174987A (de)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4003567A (en) * 1976-04-07 1977-01-18 Union Camp Corporation Sheet pick-up and feeder
US4006704A (en) * 1974-08-13 1977-02-08 Fmc Corporation Straight line gluer
US4470589A (en) * 1982-09-30 1984-09-11 Karl Singer Method and apparatus for feeding and laminating sheets
US4516763A (en) * 1982-03-30 1985-05-14 Agfa-Gevaert Aktiengesellschaft Method and apparatus for singularizing stacked X-ray films or the like
US5222858A (en) * 1991-09-24 1993-06-29 Dowen Company Limited Apparatus for collecting counting and stacking material in sheets
US5716047A (en) * 1994-03-31 1998-02-10 Canon Kabushiki Kaisha Recording or reading apparatus and sheet supply device with drive system having first and second mechanisms
US5788455A (en) * 1996-07-31 1998-08-04 Agfa Divison, Bayer Corporation Method and apparatus for picking and transporting plates in an automated platesetter
US6135437A (en) * 1996-12-20 2000-10-24 Heidelberger Druckmaschinen Ag Device and method for transporting sheets singly separated from a sheet pile
US6352255B1 (en) * 2000-06-12 2002-03-05 Xerox Corporation Reversing shuttle feeder
US6726433B1 (en) 1996-08-07 2004-04-27 Agfa Corporation Apparatus for loading and unloading a supply of plates in an automated plate handler
CN104438933A (zh) * 2014-11-28 2015-03-25 江苏亚威机床股份有限公司 一种板材立体仓库内置取料机械手的分张装置

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115740171B (zh) * 2022-11-25 2023-07-25 浙江杰伟精密机械有限公司 一种t型铅板的加工模具及其加工工艺

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2145764A (en) * 1936-05-08 1939-01-31 Crown Cork & Seal Co Sheet moving mechanism for sheet feeders
US3070367A (en) * 1957-11-09 1962-12-25 Mabeg Maschinenbau Gmbh Nachf Sheet separating and feeding device
US3370845A (en) * 1965-09-07 1968-02-27 Gen Binding Corp Sheet feeding apparatus

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2145764A (en) * 1936-05-08 1939-01-31 Crown Cork & Seal Co Sheet moving mechanism for sheet feeders
US3070367A (en) * 1957-11-09 1962-12-25 Mabeg Maschinenbau Gmbh Nachf Sheet separating and feeding device
US3370845A (en) * 1965-09-07 1968-02-27 Gen Binding Corp Sheet feeding apparatus

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4006704A (en) * 1974-08-13 1977-02-08 Fmc Corporation Straight line gluer
US4003567A (en) * 1976-04-07 1977-01-18 Union Camp Corporation Sheet pick-up and feeder
US4516763A (en) * 1982-03-30 1985-05-14 Agfa-Gevaert Aktiengesellschaft Method and apparatus for singularizing stacked X-ray films or the like
US4470589A (en) * 1982-09-30 1984-09-11 Karl Singer Method and apparatus for feeding and laminating sheets
US5222858A (en) * 1991-09-24 1993-06-29 Dowen Company Limited Apparatus for collecting counting and stacking material in sheets
US5716047A (en) * 1994-03-31 1998-02-10 Canon Kabushiki Kaisha Recording or reading apparatus and sheet supply device with drive system having first and second mechanisms
US5788455A (en) * 1996-07-31 1998-08-04 Agfa Divison, Bayer Corporation Method and apparatus for picking and transporting plates in an automated platesetter
US20040179922A1 (en) * 1996-07-31 2004-09-16 Agfa Corporation Apparatus for loading and unloading a supply of plates in an automated plate handler
US7055431B2 (en) 1996-07-31 2006-06-06 Agfa Corporation Apparatus for loading and unloading a supply of plates in an automated plate handler
US6726433B1 (en) 1996-08-07 2004-04-27 Agfa Corporation Apparatus for loading and unloading a supply of plates in an automated plate handler
US6135437A (en) * 1996-12-20 2000-10-24 Heidelberger Druckmaschinen Ag Device and method for transporting sheets singly separated from a sheet pile
US6352255B1 (en) * 2000-06-12 2002-03-05 Xerox Corporation Reversing shuttle feeder
CN104438933A (zh) * 2014-11-28 2015-03-25 江苏亚威机床股份有限公司 一种板材立体仓库内置取料机械手的分张装置

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Publication number Publication date
DE6608901U (de) 1971-12-16
CH442141A (de) 1967-08-15
DE1531086A1 (de) 1969-08-07
GB1174987A (en) 1969-12-17

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