EP0445029A1 - Papierbogenzuführvorrichtung mit Andrucksohle - Google Patents

Papierbogenzuführvorrichtung mit Andrucksohle Download PDF

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Publication number
EP0445029A1
EP0445029A1 EP91400531A EP91400531A EP0445029A1 EP 0445029 A1 EP0445029 A1 EP 0445029A1 EP 91400531 A EP91400531 A EP 91400531A EP 91400531 A EP91400531 A EP 91400531A EP 0445029 A1 EP0445029 A1 EP 0445029A1
Authority
EP
European Patent Office
Prior art keywords
sheets
stack
cylinder
path
drive means
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
EP91400531A
Other languages
English (en)
French (fr)
Other versions
EP0445029B1 (de
Inventor
Guy Chevrolier
Jean-Michel Ciccone
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.)
Sagem SA
Original Assignee
Sagem SA
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 Sagem SA filed Critical Sagem SA
Publication of EP0445029A1 publication Critical patent/EP0445029A1/de
Application granted granted Critical
Publication of EP0445029B1 publication Critical patent/EP0445029B1/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
    • B65H3/46—Supplementary devices or measures to assist separation or prevent double feed
    • B65H3/52—Friction retainers acting on under or rear side of article being separated
    • B65H3/5207—Non-driven retainers, e.g. movable retainers being moved by the motion of the article
    • B65H3/523—Non-driven retainers, e.g. movable retainers being moved by the motion of the article the retainers positioned over articles separated from the bottom of the pile
    • B65H3/5238—Retainers of the pad-type, e.g. friction pads

Definitions

  • the present invention relates to a device for feeding a machine with a series of sheets of paper arranged in a stack, comprising means for receiving the stack and means for separating each of the sheets from the stack.
  • Such a device finds its application in particular for office machines such as printers, photocopiers and fax machines, for example, the sheets of paper being, as the case may be, blank or already written.
  • the present invention aims to overcome this drawback.
  • the pressure plate is mounted movable at two degrees of freedom corresponding to two rotations, one around an axis parallel to the path of the leaves, the other around an axis perpendicular to this path.
  • said pressure flange has two projecting edges perpendicular to the path of the sheets, in contact with said flexible blade.
  • said pressure sole is provided with two wings giving it the shape of a stirrup, and it is connected, by means of an articulation of the "gimbal" type, to an elastic blade built-in pressurization.
  • Such a device is particularly simple to make and to assemble.
  • said pressure soleplate is pressurized by at least one spring bearing on a fixed support, and the position of the spring is adjustable to distribute the pressure.
  • the device can thus be adapted to different types of sheets of paper.
  • a central stop is provided to limit the amplitude of the displacement of said sole in the direction perpendicular to the plane of the sheets during their journey.
  • elastic means are provided for returning the sheets against the drive means.
  • the drive means comprise a cylinder driven in rotation about its axis, the first generator of said cylinder in contact with said flexible blade is disposed after the elastic return means on the path of the sheets, and the distance between the two is seen from the axis of the cylinder at an angle between substantially 10 degrees and substantially 30 degrees.
  • the friction surface of the drive means is made of a material whose coefficient of friction relative to the paper is greater than approximately the unit
  • the flexible retaining blade is made of a material whose coefficient of friction relative to the paper is less than substantially the unit, and the dimension, in a direction perpendicular to that of the path of the sheets, of the friction surface of the retaining means is significantly less than that of the friction surface of the means in the same direction.
  • the drive means comprise a cylinder tangent along one of its generatrices to the end sheet with which they cooperate, and the flexible blade is arranged to form an angle with the sheets of the stack other than that cooperating with the drive means.
  • This embodiment is particularly simple, safe, and of a relatively low cost price.
  • the device comprises a tray for receiving the stack 2 of sheets of paper, the bottom 1 of which is inclined relative to the horizontal, so that the stack 2 is driven, under the effect of its own weight, on the side of the lower horizontal edge 11 of tray 1.
  • This assembly comprises in particular a cylinder 3, circular and with an axis parallel to the edge 11, arranged here so that the sheet 21 most bottom of the stack 2 is substantially tangent to the surface of the cylinder 3.
  • the surface of the cylinder 3 is here made of rubber with a hardness of less than substantially 30 shores A, and its coefficient of friction with respect to the paper is of the order of 1.2.
  • the dimension of the cylinder 3 along its axis is at least of the order of magnitude of the dimension of the sheets in the same direction.
  • the cylinder 3 is driven in rotation about its axis by a motor and an appropriate drive mechanism, in the direction indicated by the arrow 33, which corresponds to the friction drive of the sheet 21 out of the tray.
  • Metal blades 32 resiliently recall the sheets of stack 2 against the cylinder 3.
  • the blades 32 each extend in a plane forming with the plane of the bottom 1 of the tank an acute angle ⁇ , and their ends press the sheets of the stack 2 at points situated substantially on the tangent generatrix T between the cylinder 3 and the sheet 21.
  • the blades 32 here have curved ends, in particular so as not to damage the sheets, or , in the absence of leaves, the surface of cylinder 3.
  • the blades 32 are fixed on the upper part 12 of the receiving tank, which forms with the bottom 1 an angle less than the angle ⁇ , thus helping to separate the sheets from stack 2.
  • a rubber blade 4 here with a hardness of the order of 60 shores A, and a coefficient of friction with respect to the paper equal to 0.9, is fixedly mounted in abutment against the cylinder 3.
  • the contact zone between the blade 4 and the cylinder 3 extends on the path of the sheet 21 when the latter is driven by the cylinder 3.
  • the blade 4 is fixed so that its face turned towards the side of the cylinder 3 extends, in its part upper, in the same plane as the blades 32.
  • the rubber blade 4 is longer than the metal blades 32, and because of its different flexibility, it bends so that the area on which it is is in contact with the cylinder 3, delimited by a generator of the cylinder 3, or contact generator, denoted C in FIG.
  • the angle ⁇ under which is seen, from the axis of the cylinder 3, the portion of the cylinder 3 between the generatrices C and T, is of the order of 15 degrees.
  • the angle ⁇ could be between substantially 10 degrees and substantially 30 degrees.
  • the flexible blade 4 is pressed against the cylinder 3 by a pressure plate 5, rigid and movably mounted with two degrees of freedom, so that the flexible blade 4 follows the shape of the cylinder 3 beyond the contact generator vs.
  • the pressure plate 5 is provided with two wings 53 and 54 which give it the shape of a stirrup.
  • Each of the wings 53 and 54 is provided with an oblong slot in which an end 551 and 552 engages respectively, with a axis 55 parallel to the axis of the cylinder 3.
  • the axis 55 comprises a rounded bulged part 553 which bears against the sole 5 itself.
  • the axis 55 is connected to a recessed elastic blade 6 for pressurizing, which thus presses the sole 5 against the blade 4.
  • the sole 5 is therefore movable in rotation about the axis 55 perpendicular to the path of the sheets, and, thanks to the oblong slots of its wings 53 and 54, around an axis parallel to this path.
  • Each of these rotations corresponds to a degree of freedom, the arrangement which has just been described forming an articulation of the "gimbal" type between the sole 5 and the embedded elastic blade 6.
  • the sole 5 also comprises two edges 51 and 52, parallel to the axis of the cylinder 3, and therefore perpendicular to the path of the sheets, in contact with the flexible blade 4.
  • the dimension of the blade 4, along the axis of the cylinder 3, that is to say perpendicular to the path of the sheets, is notably lower than that of the roller 3, and the blade 4 extends in the central part of the roller 3, the blades 32 being arranged here on either side of the blade 4.
  • the device which has just been described operates as follows.
  • the sheet 21 slides without difficulty against the sheet of the immediately upper stack, it is the only one to be driven. However, it is frequent that the sheet 21 carries with it one or more sheets of the stack, in particular because the coefficient of friction between the various sheets of paper is too high, or else because the sheets remain integral with each other. others by the roughness of their edges.
  • FIG. 4 Such a situation, where several sheets of the stack 2 are entrained is shown in FIG. 4, where it appears that the rubber blade 4, arranged in the path of the sheets thus entrained, retains the sheets other than the sheet 21 which cooperates with cylinder 3. Blade 4 retains the sheets for two reasons. On the one hand, the leaves other than the sheet 21 form with the blade 4 an angle denoted ⁇ which means that they tend to remain blocked against the blade 4. This is in particular due to the offset between the generatrices T and C. D ' on the other hand, if despite everything the sheet placed immediately above the sheet 21 is entrained in the contact zone between the blade 4 and the cylinder 3, it will be retained, by friction, by the blade 4.
  • the friction force between the blade 4 and the sheet 21 is less than that between the cylinder 3 and the sheet 21, which has as a consequence the driving of the sheet 21.
  • the frictional force of the blade 4 is sufficient to retain, by friction, any sheet other than that which cooperates with the cylinder 3.
  • each of the sheets from the stack 2 is ensured by the cooperation of the cylinder 3 which directly drives a single sheet, and of the blade 4 which retains the sheets other than that directly driven, but which could nevertheless s 'be found entrained indirectly.
  • the pressure plate 5 due to its two degrees of freedom, is automatically put in place, and ensures constant pressure.
  • FIG. 5 there is shown a variant of the device of Figure 1, in which the same elements have the same references.
  • the device of FIG. 5 essentially differs from that of FIG. 1 by the shape and the mounting of the sole.
  • the sole 5 ′ of FIG. 5 is provided with projecting edges 51 ′ and 52 ′, here more rounded than the edges 51 and 52, and fasteners 53 ′ each comprising an oblong lumen which cooperates with a fixed axis integral with a rigid support 8.
  • One or more springs 6 ′ here coil springs, are arranged between the support 8 and the sole 5 ′ to put it under pressure.
  • the position of the line of action D of the springs 6 ′ is adjustable, by means of lugs not shown for the sake of simplicity, cooperating with each of the ends of the springs 6 ′.
  • the sole 5 ′ is therefore, like the sole 5, movable around two perpendicular axes, and the distribution of the pressure between the edges 51 ′ and 52 ′ is adjustable by varying the position of the springs 6 ′.
  • an adjustable stop is provided, here a simple screw 9, cooperating with a threaded hole in the support 8, and which limits the amplitude of movement of the sole 5 ′ in the direction perpendicular to the plane of the sheets during their journey.
  • the screw 9 is in a central position relative to the sole 5 ′, so that when the sole 5 ′ abuts against the screw 9, the lifting of the edge 52 ′ by the sheet pack 2 causes the tilting of the sole 5 ′ around its point of contact with the screw 9, in order to bring the edge 51 ′ of the cylinder 3 and thus prevent the package of sheets from passing under the flexible blade 4.
  • the present invention is not limited to the embodiment which has been described, and it is in particular within the reach of the skilled person to determine, for the cylinder 3 and the blade 4, materials other than those which have been described, by combining the friction forces to achieve the desired result. Good results are obtained when the coefficient of friction of the blade 4 relative to the paper is less than unity, that of the cylinder 3 relative to the paper being greater than unity.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sheets, Magazines, And Separation Thereof (AREA)
  • Pile Receivers (AREA)
EP91400531A 1990-03-02 1991-02-27 Papierbogenzuführvorrichtung mit Andrucksohle Expired - Lifetime EP0445029B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9002630 1990-03-02
FR9002630A FR2659071B1 (fr) 1990-03-02 1990-03-02 Dispositif d'alimentation d'une machine en feuilles de papier, a semelle de pression.

Publications (2)

Publication Number Publication Date
EP0445029A1 true EP0445029A1 (de) 1991-09-04
EP0445029B1 EP0445029B1 (de) 1995-10-25

Family

ID=9394313

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91400531A Expired - Lifetime EP0445029B1 (de) 1990-03-02 1991-02-27 Papierbogenzuführvorrichtung mit Andrucksohle

Country Status (5)

Country Link
EP (1) EP0445029B1 (de)
DE (1) DE69114030T2 (de)
ES (1) ES2079593T3 (de)
FR (1) FR2659071B1 (de)
GB (1) GB2242415A (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2684977A1 (fr) * 1991-12-13 1993-06-18 Monetel Dispositif de desempilage.
EP0704395A1 (de) * 1994-08-31 1996-04-03 Riso Kagaku Corporation Bogenanleger

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AUPN162595A0 (en) * 1995-03-09 1995-03-30 Amalgamated Wireless (Australasia) Limited Card picking apparatus for ticketing machine
JP4752873B2 (ja) 2008-06-20 2011-08-17 ブラザー工業株式会社 シート材搬送装置、それを備えた画像読取装置さらに画像読取装置を備えた画像記録装置

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH538985A (de) * 1972-06-06 1973-07-15 Frama Ag Entnahmevorrichtung für gestapelte flache Gegenstände
US4606535A (en) * 1984-11-30 1986-08-19 The Mead Corporation Sheet feeding device
DE8437890U1 (de) * 1984-12-22 1987-04-16 Professor Alfred Krauth Apparatebau GmbH & Co KG, 6930 Eberbach Ausgeber für Einzelausgabe von Banknoten
EP0280210A2 (de) * 1987-02-23 1988-08-31 Sharp Kabushiki Kaisha Papiertransportsystem
EP0281820A2 (de) * 1987-02-23 1988-09-14 Sharp Kabushiki Kaisha Papiertransportsystem
EP0374826A1 (de) * 1988-12-20 1990-06-27 Alcatel Business Systems Entstapler für flache Gegenstände

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3439844A1 (de) * 1983-09-14 1985-05-09 Ricoh Co., Ltd., Tokio/Tokyo Automatische blattzufuehreinrichtung
JPH07110034B2 (ja) * 1987-07-06 1995-11-22 キヤノン株式会社 シ−ト状物の搬送読取り装置

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH538985A (de) * 1972-06-06 1973-07-15 Frama Ag Entnahmevorrichtung für gestapelte flache Gegenstände
US4606535A (en) * 1984-11-30 1986-08-19 The Mead Corporation Sheet feeding device
DE8437890U1 (de) * 1984-12-22 1987-04-16 Professor Alfred Krauth Apparatebau GmbH & Co KG, 6930 Eberbach Ausgeber für Einzelausgabe von Banknoten
EP0280210A2 (de) * 1987-02-23 1988-08-31 Sharp Kabushiki Kaisha Papiertransportsystem
EP0281820A2 (de) * 1987-02-23 1988-09-14 Sharp Kabushiki Kaisha Papiertransportsystem
EP0374826A1 (de) * 1988-12-20 1990-06-27 Alcatel Business Systems Entstapler für flache Gegenstände

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2684977A1 (fr) * 1991-12-13 1993-06-18 Monetel Dispositif de desempilage.
WO1993012023A1 (fr) * 1991-12-13 1993-06-24 Monetel S.A. Dispositif de desempilage
US5413325A (en) * 1991-12-13 1995-05-09 Monetel S.A. Method for disassembling sheets of paper
EP0704395A1 (de) * 1994-08-31 1996-04-03 Riso Kagaku Corporation Bogenanleger
US5823524A (en) * 1994-08-31 1998-10-20 Riso Kagaku Corporation Sheet feeder with flexible frictional member for separating sheets

Also Published As

Publication number Publication date
EP0445029B1 (de) 1995-10-25
DE69114030D1 (de) 1995-11-30
FR2659071B1 (fr) 1992-07-24
FR2659071A1 (fr) 1991-09-06
DE69114030T2 (de) 1996-06-20
GB2242415A (en) 1991-10-02
ES2079593T3 (es) 1996-01-16
GB9104369D0 (en) 1991-04-17

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