EP0615514B1 - Mecanisme d'alimentation de feuilles - Google Patents

Mecanisme d'alimentation de feuilles Download PDF

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Publication number
EP0615514B1
EP0615514B1 EP92924795A EP92924795A EP0615514B1 EP 0615514 B1 EP0615514 B1 EP 0615514B1 EP 92924795 A EP92924795 A EP 92924795A EP 92924795 A EP92924795 A EP 92924795A EP 0615514 B1 EP0615514 B1 EP 0615514B1
Authority
EP
European Patent Office
Prior art keywords
belt
feeding mechanism
sheet feeding
paper
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.)
Expired - Lifetime
Application number
EP92924795A
Other languages
German (de)
English (en)
Other versions
EP0615514A1 (fr
Inventor
Stephen Christopher Watkins
Michael Burlington
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.)
Acco Rexel Group Services Ltd
Original Assignee
Acco Rexel Group Services 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 Acco Rexel Group Services Ltd filed Critical Acco Rexel Group Services Ltd
Publication of EP0615514A1 publication Critical patent/EP0615514A1/fr
Application granted granted Critical
Publication of EP0615514B1 publication Critical patent/EP0615514B1/fr
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
    • B65H3/02—Separating articles from piles using friction forces between articles and separator
    • B65H3/04—Endless-belt separators
    • B65H3/042—Endless-belt separators separating from the bottom of the pile

Definitions

  • This invention is concerned with improvements relating to sheet feeding mechanism.
  • Difficulty is encountered in feeding sheet material from a stack thereof, particularly where it is desired to fed more than one sheet at a time, and/or where it is desired that the mechanism used is simple in its construction and relatively inexpensive.
  • the number of sheets which it may be desired to feed at a time will be dependent upon the capacity of the shredding machine being used. For example, single sheet feeding will lead to an under utilisation of the shredding machine, whilst if the number of sheets which are fed exceeds a certain value, the shredding machine will tend to jam.
  • Difficulties are encountered in conventional feeding mechanisms for such operations, particularly in the ability of the sheet feeding mechanism to cope with a number of sheets which may be stapled together.
  • the control member is disposed above a portion of the belt where the belt passes from the support means and prior to the belt passing onto the second roller.
  • Preferably means is provided to vary the size of the gap.
  • paper placed on the belt will be transferred through the gap, conveniently being fed to chute means for conveying the paper into a shredding machine, the size of the gap controlling the number of pages fed simultaneously by the sheet feeding mechanism.
  • the belt will be flexed downwardly to increase the effective size of the gap, permitting passage through the gap of an increased number of pages.
  • Increased forward force on the belt as is necessary to cause the belt to flex in this manner, will increase the frictional forces between the belt and the lowermost sheet, increasing the force available for stripping the paper from (eg) a staple as may be causing the increased quantity.
  • control member is mounted for movement towards and away from the belt, preferably being urged (such as by a spring means) towards the belt into a position in which it is close to the belt, e.g. being spaced therefrom by a small distance.
  • clamping means is provided to urge a stack of paper downwardly against the belt, the belt picking up the lowermost sheet from such stack, and conveying it towards the gap, and towards the shredding machine.
  • the clamping means comprises a member which is mounted for movement, so as to retain a disposition substantially parallel to the upper stretch of the belt, notwithstanding variation in the height of the stack of paper on the belt.
  • the clamping member is pivotally mounted, such as at a central region thereof, to a cover of the sheet feeding mechanism, which may be pulled down to enclose moving parts of the feeding mechanism, enabling safe operation thereof.
  • the lid may be effective to operate an enabling switch, to cause or allow the drive means to operate.
  • the belt comprises a plurality of sections, spaced apart in the widthwise direction (i.e. at rights angles to the direction of travel).
  • the sheet feeding mechanism which is the preferred embodiment of the invention is specifically for the feeding of sheets of documentary material such as paper into a chute 11, from which the sheet material will enter a shredding machine 40, schematically shown in Figure 2, of conventional manufacture.
  • the sheet feeding mechanism comprises a housing 12 within which there is mounted a pair of rollers 14 a , 14 b , around which a belt 16 of flexible material, such as rubber or elastomer, is located.
  • Drive mechanism 10 is provided for rotating one of the rollers 14, to cause the belt to rotate within the housing 12 in the direction shown.
  • Spring means 13 may be provided to urge the rollers apart to maintain tension in the belt.
  • the belt 16 comprises three sections 16 a ,16 b , 16 c spaced widthwise of the machine, a central portion of the upper reach of said sections passing over a support plate 18 carried by side plates of the housing 12 to support the belt against movement in a downward direction.
  • a support plate 18 carried by side plates of the housing 12 to support the belt against movement in a downward direction.
  • the belt passes beneath a control member in the form of a plate 19, which is urged by a strong spring 30 acting between the plate 19 and a bar 31 extending from the housing on each side thereof, into engagement with a stop 32, so that the lower edge of the plate is spaced a short distance X from the upper reach of the belt, the stop 32 being adjustable to enable the distance X to be varied.
  • a cover 22 Pivotally mounted on a shaft 20 towards the rear end of the machine is a cover 22, the cover carrying a presser plate 26 in a manner such that the presser plate is free for pivotal movement relative to the cover 22.
  • the presser plate 26 may be carried on a pivotal mounting 24, but preferably, as is shown in Figure 3, the presser plate 26 carries spaced, parallel bars 36, which are receivable in slots 38 in the cover, springs being provided to urge the bars 36 into engagement with stops, allowing the presser plate 26 to float in either direction in a pivot-like upward movement against the action of the springs.
  • the presser plate 26 may adopt a position in which it is substantially parallel to the upper reach of the belt 16, independent of the thickness of a stack of documentary material which may be placed with the machine.
  • a stack of documentary material will be placed within a receiving area 28, defined by the side walls of the housing, in engagement with the belt 16, and the lid 22 will be lowered allowing the presser plate 26 to rest on the documentary material.
  • Such lowering of the lid may depress a micro-switch, causing a control circuit to be facilitated.
  • driving of the belt 16 will withdraw by frictional forces a sheet from the lowermost face of the stack, and convey the sheet through the gap X, to pass between the nip between the roller 14 b and a further roller 15 into the chute 11 towards shredding mechanism 40, to be shredded.
  • driving of the belt 16 will withdraw by frictional forces a sheet from the lowermost face of the stack, and convey the sheet through the gap X, to pass between the nip between the roller 14 b and a further roller 15 into the chute 11 towards shredding mechanism 40, to be shredded.
  • shredding mechanism 40 to be shredded.
  • control member 19 In the event that an unduly large number of sheets is stapled together, which are incapable of being stripped apart, subsequent to the achieval of maximum deflection of the belt, the control member 19 is free to lift to a small extent against the action of the springs 30, the force requiring to overcome the strong spring being greater than the force required initially to deflect the belt 16 in the direction Y.
  • Such lifting of the control member 19 may be such as immediately to effect a termination operation, in which operation of the sheet feeding mechanism is terminated, together with (if desired) operation of the shredding mechanism, to prevent the shredding mechanism becoming jammed.
  • control device 29 comprising an arm 42 projecting laterally from the plate 19 on its outer side, against which a spring loaded plunger 44 of a microswitch 46 is urged.
  • a control device 29 comprising an arm 42 projecting laterally from the plate 19 on its outer side, against which a spring loaded plunger 44 of a microswitch 46 is urged.
  • the control plate 19 rises to the maximum desired height, the permitted movement of the plunger 44 will open the microswitch 46, in turn causing the drive motor 10 to cease operation.
  • the sheet feeding mechanism will operate automatically to feed paper at a fairly high rate but the machine will automatically terminate operation prior to a jam within the shredding machine occurring.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sheets, Magazines, And Separation Thereof (AREA)
  • Crushing And Pulverization Processes (AREA)

Abstract

L'invention concerne un mécanisme d'alimentation de feuilles conçu pour amener des feuilles de documents, tels que du papier, dans un plan incliné à partir duquel la feuille pénétrera dans une déchiqueteuse (10). Le mécanisme d'alimentation de feuilles se compose d'une enceinte (12) dans lequel est montée une paire de rouleaux (14a^_, 14b^_) autour desquels est placée une courroie (16) de manière souple, telle que du caoutchouc, un mécanisme d'entraînement (10) étant prévu pour faire tourner un des rouleaux (14) afin que la courroie puisse tourner dans l'enceinte (12). Une partie centrale de l'extension supérieure de la courroie (16) passe au-dessus d'une plaque support (18) pour soutenir la courroie dans son mouvement descendant. Entre l'extrémité de la plaque support (18) et le passage de la courroie sur le rouleau (14b^_), la courroie passe au-dessous d'un élément de commande de la forme d'une plaque (19), poussée par un ressort (30) dans une position dans laquelle elle se trouve espacée à une courte distance (X) de l'extension supérieure de la courroie. Une plaque d'appui (26) est ménagée pour pousser une pile de papier sur l'étendue supérieure de la courroie vers la courroie. Ce papier est saisi par le déplacement de la courroie et est amené vers le vide (X), entre le rouleau (14b^_) et un second rouleau (15) le long d'un plan incliné (11) dans une déchiqueteuse (40). Dans le cas où la courroie ramassant une pluralité de feuilles adjacentes au moment où elles sont amenées vers le vide X, la courroie (16) sera déviée vers le bas, l'épaisseur de papier augmentée passant au-dessous de l'élément de commande (19) contre la déviation de la courroie (16) augmentant les forces de fixation qui agissent entre la courroie et la feuille de papier située la plus en-dessous.

Claims (9)

  1. Mécanisme d'alimentation en feuilles comportant un premier et un second rouleaux espacés (14a, 14b), une courroie souple (16) passée autour des rouleaux, un moyen d'entraînement (10)pour faire tourner la courroie autour des rouleaux, un moyen de support (18) pour supporter une longueur supérieure de la courroie lorsqu'elle passe du premier (14a) au second (14b) rouleaux, et un élément de commande (19) disposé au-dessus de la longueur supérieure de la courroie pour créer avec la courroie un espace (X) par lequel peut avancer du papier placé sur la courroie, caractérisé en ce que l'élément de commande (19) est disposé au-dessus d'une partie de la courroie (16) où la courroie s'éloigne du moyen de support (178) et avant que la courroie ne vienne passer sur le second rouleau (14b).
  2. Mécanisme d'alimentation en feuilles selon la revendication 1, dans lequel un moyen est prévu pour modifier les dimensions de l'espace (X).
  3. Mécanisme d'alimentation en feuilles selon la revendication 1 ou la revendication 2, dans lequel l'élément de commande (19) est monté pour se rapprocher et s'éloigner de la courroie (16), un moyen (30) étant prévu pour pousser l'élément de commande (19) vers la bande pour qu'elle vienne contre une butée réglable.
  4. Mécanisme d'alimentation en feuilles selon l'une quelconque des revendications précédentes, comportant un moyen de serrage (22, 26) pour pousser une pile de papier vers le bas contre la courroie.
  5. Mécanisme d'alimentation en feuilles selon la revendication 4, dans lequel le moyen de serrage comporte un élément (26) monté pour se déplacer afin de rester disposé sensiblement parallèlement à la longueur supérieure de la courroie (16).
  6. Mécanisme d'alimentation en feuilles selon l'une des revendications 4 et 5, dans lequel l'élément de serrage (26) est monté sur un capot (22) du mécanisme d'alimentation en feuilles.
  7. Mécanisme d'alimentation en feuilles selon l'une quelconque des revendications précédentes, dans lequel la courroie (16) comporte plusieurs sections (16a, 16b, 16c) espacées les unes des autres dans le sens de la largeur.
  8. Mécanisme d'alimentation en feuilles selon l'une quelconque des revendications précédentes, comportant un moyen (29) servant à interrompre automatiquement le fonctionnement du mécanisme d'alimentation lorsque les dimensions de l'espace viennent à dépasser une valeur prédéterminée.
  9. Mécanisme d'alimentation en feuilles selon l'une quelconque des revendications précédentes, en combinaison avec un mécanisme de déchiquetage (40) disposé à proximité immédiate du second rouleau (14b) de façon que le papier acheminé par le mécanisme soit introduit dans l'étranglement de la déchiqueteuse.
EP92924795A 1991-12-07 1992-12-07 Mecanisme d'alimentation de feuilles Expired - Lifetime EP0615514B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB9126042 1991-12-07
GB919126042A GB9126042D0 (en) 1991-12-07 1991-12-07 Sheet feeding mechanism
PCT/GB1992/002264 WO1993012022A1 (fr) 1991-12-07 1992-12-07 Mecanisme d'alimentation de feuilles

Publications (2)

Publication Number Publication Date
EP0615514A1 EP0615514A1 (fr) 1994-09-21
EP0615514B1 true EP0615514B1 (fr) 1997-06-25

Family

ID=10705871

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92924795A Expired - Lifetime EP0615514B1 (fr) 1991-12-07 1992-12-07 Mecanisme d'alimentation de feuilles

Country Status (6)

Country Link
EP (1) EP0615514B1 (fr)
JP (1) JPH07501777A (fr)
AU (1) AU3090492A (fr)
DE (1) DE69220578T2 (fr)
GB (1) GB9126042D0 (fr)
WO (1) WO1993012022A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8336794B2 (en) 2010-04-16 2012-12-25 Acco Uk Limited Paper shredder with staple and clip remover
US8196851B2 (en) * 2010-04-16 2012-06-12 Acco Uk Limited Paper shredder with feeder
US9284144B2 (en) 2014-01-29 2016-03-15 Crane Payment Innovations, Inc. Validator with a dynamic document path height

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1866690A (en) * 1931-05-18 1932-07-12 Harry W Wilson Paper shredding and crimping machine
DE3112918C2 (de) * 1981-03-31 1986-11-13 Hermann 7777 Salem Schwelling Aktenvernichter
GB8502572D0 (en) * 1985-02-01 1985-03-06 Ofrex Group Plc Sheet feeding mechanism

Also Published As

Publication number Publication date
AU3090492A (en) 1993-07-19
DE69220578T2 (de) 1997-10-09
JPH07501777A (ja) 1995-02-23
GB9126042D0 (en) 1992-02-05
WO1993012022A1 (fr) 1993-06-24
DE69220578D1 (de) 1997-07-31
EP0615514A1 (fr) 1994-09-21

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