EP1939122A1 - Verfahren und Vorrichtung zur Regelung und Kalibrierung des Abstandes zwischen einer Rolle und einer Reibvorrichtung eines Gerätes zur Trennung von Blättern von einem Stapel - Google Patents

Verfahren und Vorrichtung zur Regelung und Kalibrierung des Abstandes zwischen einer Rolle und einer Reibvorrichtung eines Gerätes zur Trennung von Blättern von einem Stapel Download PDF

Info

Publication number
EP1939122A1
EP1939122A1 EP06077330A EP06077330A EP1939122A1 EP 1939122 A1 EP1939122 A1 EP 1939122A1 EP 06077330 A EP06077330 A EP 06077330A EP 06077330 A EP06077330 A EP 06077330A EP 1939122 A1 EP1939122 A1 EP 1939122A1
Authority
EP
European Patent Office
Prior art keywords
conveyor roller
separating
drive
separating surface
relative
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.)
Withdrawn
Application number
EP06077330A
Other languages
English (en)
French (fr)
Inventor
Jan Jacobus Peter Remeijnse
Christiaan Antoon Munneke
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.)
Quadient Technologies France SA
Original Assignee
Neopost Technologies 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 Neopost Technologies SA filed Critical Neopost Technologies SA
Priority to EP06077330A priority Critical patent/EP1939122A1/de
Publication of EP1939122A1 publication Critical patent/EP1939122A1/de
Withdrawn legal-status Critical Current

Links

Images

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
    • B65H3/06—Rollers or like rotary separators
    • B65H3/0669—Driving devices therefor
    • 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
    • B65H3/06—Rollers or like rotary separators
    • B65H3/0676—Rollers or like rotary separators with two or more separator rollers in the feeding 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
    • B65H3/46—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
    • B65H3/5215—Non-driven retainers, e.g. movable retainers being moved by the motion of the article the retainers positioned under articles separated from the top of the pile
    • B65H3/5223—Retainers of the pad-type, e.g. friction pads
    • 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
    • B65H3/5246—Driven retainers, i.e. the motion thereof being provided by a dedicated drive
    • B65H3/5276—Driven retainers, i.e. the motion thereof being provided by a dedicated drive the retainers positioned over articles separated from the bottom of the pile
    • B65H3/5284—Retainers of the roller type, e.g. rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H7/00—Controlling article feeding, separating, pile-advancing, or associated apparatus, to take account of incorrect feeding, absence of articles, or presence of faulty articles
    • B65H7/18—Modifying or stopping actuation of separators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/40—Type of handling process
    • B65H2301/42—Piling, depiling, handling piles
    • B65H2301/423—Depiling; Separating articles from a pile
    • B65H2301/4232—Depiling; Separating articles from a pile of horizontal or inclined articles, i.e. wherein articles support fully or in part the mass of other articles in the piles
    • B65H2301/42322—Depiling; Separating articles from a pile of horizontal or inclined articles, i.e. wherein articles support fully or in part the mass of other articles in the piles from bottom of the pile
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/40—Type of handling process
    • B65H2301/42—Piling, depiling, handling piles
    • B65H2301/423—Depiling; Separating articles from a pile
    • B65H2301/4232—Depiling; Separating articles from a pile of horizontal or inclined articles, i.e. wherein articles support fully or in part the mass of other articles in the piles
    • B65H2301/42324—Depiling; Separating articles from a pile of horizontal or inclined articles, i.e. wherein articles support fully or in part the mass of other articles in the piles from top of the pile
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2511/00—Dimensions; Position; Numbers; Identification; Occurrences
    • B65H2511/10—Size; Dimensions
    • B65H2511/13—Thickness
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2511/00—Dimensions; Position; Numbers; Identification; Occurrences
    • B65H2511/10—Size; Dimensions
    • B65H2511/135—Surface texture; e.g. roughness
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2511/00—Dimensions; Position; Numbers; Identification; Occurrences
    • B65H2511/20—Location in space
    • B65H2511/21—Angle
    • B65H2511/212—Rotary position
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2511/00—Dimensions; Position; Numbers; Identification; Occurrences
    • B65H2511/20—Location in space
    • B65H2511/22—Distance
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2511/00—Dimensions; Position; Numbers; Identification; Occurrences
    • B65H2511/20—Location in space
    • B65H2511/22—Distance
    • B65H2511/224—Nip between rollers, between belts or between rollers and belts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2513/00—Dynamic entities; Timing aspects
    • B65H2513/10—Speed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2513/00—Dynamic entities; Timing aspects
    • B65H2513/10—Speed
    • B65H2513/11—Speed angular
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2515/00—Physical entities not provided for in groups B65H2511/00 or B65H2513/00
    • B65H2515/30—Forces; Stresses
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2515/00—Physical entities not provided for in groups B65H2511/00 or B65H2513/00
    • B65H2515/30—Forces; Stresses
    • B65H2515/32—Torque e.g. braking torque
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2553/00—Sensing or detecting means
    • B65H2553/51—Encoders, e.g. linear
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2557/00—Means for control not provided for in groups B65H2551/00 - B65H2555/00
    • B65H2557/20—Calculating means; Controlling methods
    • B65H2557/23—Recording or storing data
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2557/00—Means for control not provided for in groups B65H2551/00 - B65H2555/00
    • B65H2557/60—Details of processes or procedures
    • B65H2557/61—Details of processes or procedures for calibrating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2601/00—Problem to be solved or advantage achieved
    • B65H2601/10—Ensuring correct operation
    • B65H2601/12—Compensating; Taking-up

Definitions

  • the invention relates to a method for adjusting an apparatus for separating sheets, such as paper or plastic sheets or envelopes, from a stack and to such an apparatus.
  • sheets from a top or bottom end of a stack are fed into a separating area where each time a sheet is separated and from where the separated sheet is fed individually.
  • separating the sheets several principles of operation are known, such as friction separation and gap separation.
  • a sheet In friction separation, a sheet is individually separated from other sheets having been fed to the separating area because friction between on the one hand a surface urging an outer one of the sheets in transport direction and friction between a separating surface restraining next sheets from being entrained by the outer sheet and the next sheets in contact with the separating surface are higher than the friction between the outer sheet and the next sheet or sheets.
  • Separation based on this principle does generally not require any adjustment by an operator to properties of the sheets to be separated, but is relatively sensitive to the condition of the surfaces contacting the sheets and of the properties of the surfaces of the sheets and is less suitable for processing relatively thick sheets and for separating items that each are constituted by two or more sheets, such as brochures.
  • gap separation In gap separation, a gap between conveyor and separating surfaces facing the separating area from opposite sides is set such, that only one sheet or set of sheets at a time can pass through the gap.
  • the next sheets are restrained by the separating surface from being entrained by the outer sheet or set of sheets, since the next sheet or sheets do not fit between the conveyor and separating surfaces together with the outer sheet or set of sheets.
  • the outer sheet is transported in the transport direction and thereby separated from the others. This enables to separate sheets or sets of sheets reliably with little, if any, significant influence of the properties of the surfaces facing the separating area or of the surfaces of the sheets to be separated.
  • the gap needs to be adjusted by an operator by adjusting the positions relative to each other of the surfaces facing the separating area from opposite sides, to the thickness of the type of sheets or of the sets of sheets to be separated from the stack.
  • the operator may for instance initially set the relative positions such that a specimen of the sheets to be separated can easily be brought into the separating area and subsequently adjust the position of one of the surfaces towards the separating area until the operator senses slight amount of friction between the sheet and the surfaces facing the separating area. This is a cumbersome procedure and the adjustment depends on the experience and feeling of the operator.
  • this object is achieved by providing a method according to claim 1.
  • the invention may also be embodied in a separating apparatus according to claim 9, which is specifically adapted for use in this method.
  • the measured value of the variable dependent on resistance encountered by the drive as a measure for determining whether at least the position of the conveyor roller relative to the separating surface or the position of the separating surface relative to the conveyor roller needs to be adjusted or adjusted further, it can be determined reliably and accurately and in a simple manner without relying on the experience of the operator, whether the separating apparatus needs to be adjusted or adjusted further.
  • the invention is first discussed with reference to an example of an apparatus according to the invention shown in Figs. 1-3 .
  • the apparatus has a hopper tray 15 for holding a stack 2 of sheets.
  • the hopper tray 15 is suspended relative to a main frame 16 via two pairs of bars 17, 18 that are each pivotably linked to the frame 16 and to the hopper tray 15.
  • a motor 19 is mounted to the frame 16.
  • a threaded drive shaft 20 coupled to the motor 19 engages a nut 21 that is mounted to one of the bars 17.
  • a feeding roller 1 is positioned and arranged for feeding sheets 3 from a stack 2 in a transport direction, indicated by an arrow 13, to a separating area 4, after the hopper tray 15 has been lifted to a position in which an uppermost sheet 3 of the stack is near the feeding roller 1.
  • the feeding roller 1 is rotatably suspended in a rocker arm 25 which is suspended pivotably about a shaft 7 and coupled to a solenoid 26 for bringing the feeding roller 1 selectively in and out of contact with the uppermost sheet 3 of the stack 2.
  • a conveyor roller 5 and a separating surface 9 are arranged downstream in transport direction 13 of the feeding roller 1.
  • the conveyor roller 5 has a circumferential surface 6 extending around its axis of rotation 7.
  • the separating surface is provided in the form of a circumferential surface of a separating roller 8. Portions of the circumferential surface 6 of the conveyor roller 5 and of the separating surface 9 face the separating area 4 from opposite sides and in essentially opposite directions.
  • two sets of transport rollers 22, 23 are arranged for transporting sheets that are being separated away from the stack 2.
  • a motor 11 is coupled to the conveyor roller 5 via a drive train 24 for driving rotation of the conveyor roller 5 about its axis of rotation 7 in a sense of rotation for transporting a sheet 3 in contact with its circumferential surface 6 in the transport direction 13.
  • the drive train 24 is also coupled for driving the separating roller 8 in a sense of rotation for urging a sheet in the separating area 4 that is in contact with the circumferential surface 9 of the separating roller in a direction opposite to the transport direction 13.
  • the drive train 24 is coupled to the transport roller sets 22, 23 for driving these sets of rollers.
  • the relative positions of the conveyor roller 5 and the separating surface 9 are critical.
  • the correct distance between the conveyor roller 5 and the separating surface 9 depends inter alia on the thickness and the surface properties of the sheets to be separated. A too small distance will cause that the delivery of sheets is unreliable and the sheets mat become damaged. If the distance is too large, more than one sheet or set of sheets may be delivered at a time and the delivery of sheets may become unreliable.
  • the adjustment structure 10 includes a DC-motor 27, a schematically shown control system 12 coupled to the motor, a drive shaft 28 and a pulse disk 29 coupled to the motor 27, a pulse detector 30 and a separating roller carrier 31 having a threaded bore which engages a threaded end 32 of the drive shaft 28.
  • a measuring unit For measuring rotation of the conveyor roller 5, a measuring unit is provided, which includes a pulse disk 33 rotationally fixed to the shaft 7 (and thus also relative to the conveyor roller 5 and a pulse detector 34 mounted along the periphery of the pulse disk 33 and connected to the control system 12.
  • a pulse disk 35 is rotationally fixed to one of the shafts of that set of rollers 22 for co-rotation with the transport rollers on that shaft and a pulse detector 36 is mounted along the periphery of the pulse disk 35 and also connected to the control system 12.
  • the signals sent by the pulse detectors 34, 36 to the control system 12 may represent just the detection of pulses, but may also represent angular movement or the rotational velocity of the respective pulse disk 33, 35.
  • the rotation of the conveyor roller and of the transport rollers may also be monitored by monitoring commands sent to a stepper motor or commands sent to a brushless DC motor.
  • the control system 12 is arranged for controlling the motor 11 and the drive train 24 for driving the conveyor roller 5 and the transport roller sets 22, 23 and the motor 27 for adjusting the distance between the separating surface 9 and the conveyor roller, before separation of sheets from the stack 2 is started or continued, to carry out a procedure as is described below.
  • the separating surface 9 is retracted far enough to allow reliable entry of a sheet or a set of mutually connected sheets 3 into the separating area 4. Then, a single specimen 3 of the sheets or sets of sheets in the stack 2 to be separated is brought into the separating area 4, either by hand or by placing a single sheet or set of sheets in the hopper tray 15 and entering a command that causes the control system 12 to control the motor 11 and the drive train 24 such that the feeding roller 1 engages the sheet or set of sheets 3 and advances it in the transport direction 13 into a position extending into the separating area 4.
  • control system 12 controls the motor 11 and the drive train for driving the rotation of the conveyor roller 5, while the sheet 3 is held stationary and thereby refrained from being displaced by the conveyor roller 5.
  • the pulse detector sends information representative of rotation of the conveyor roller 5 to the control system 12. This rotation is dependent on resistance encountered by the drive 11, 24, because the motor 11 will be slowed down by the encountered resistance.
  • rotation or rotational velocity also other variables dependent on resistance encountered by the drive could be measured and checked against a criterion, such as a change in velocity, the current required to achieve a certain rotational velocity or the torque exerted to achieve a certain rotational velocity.
  • control system 12 compares the received value representative of rotation of the conveyor roller 5 with a predetermined criterion in the form of a value range for the rotation of the conveyor roller 5 that would have been obtained if the resistance encountered, mainly caused by friction between the conveyor roller and the sheet 3, would have been within a predetermined range.
  • a next adjustment cycle is started after the adjustment motor 27 has been controlled to adjust (preferably reduce) the position of the separating surface 9 relative to the conveyor roller 5. If the received value representative of rotation of the conveyor roller 5 is inside the predetermined range, the adjustment procedure is completed and terminated by removing the test sheet 3 from the separating area 4.
  • a warning signal is generated, for example in the form of an audio signal or a visual signal on a display, if none of the measured variables obtained throughout an available range of the adjustment structure 10 meets the predetermined criterion.
  • a sheet 3 may also be inserted after the drive 11 for rotation of the conveyor roller 5 is activated.
  • the adjustment cycle may be a continuous process in which the conveyor roller 5 is rotated and the variable dependent on the encountered resistance is continuously or repeatedly measured while adjusting the position of the separating surface 9.
  • the adjustment structure and control system operates fast enough, it is possible to carry out an adjustment cycle during the transportation of the sheet through the separating area instead of while holding the sheet or set of sheets stationary.
  • the resistance encountered by the drive driving the conveyor roller depends mainly on the friction between the test sheet and the separating surface.
  • a version of the separating apparatus shown in Figs. 1-3 is shown that is equipped with a grip 14 for holding the test sheet 3 stationary in the separating area 4.
  • the grip 14 is rotationally fixed to a shaft 37 of which rotation indicated by an arrow 38 can be operated by a solenoid 39 under control of the control system 12.
  • the grip 14 was in a raised position pivoted away from the path to be followed by the sheet as it is passed into the position extending into the separating area 4.
  • the grip 14 is shown in an activated position in which it is lowered and engages the sheet 3. After the adjustment procedure has been completed, the grip 14 is pivoted away from the sheet 3 again under control of the control system 12.
  • the criterion against which the variable dependent on the resistance encountered by the drive is checked may be selected such that the relative positions of the conveyor roller and the separating surface at which the variable meets the criterion is such that these positions are suitable for and retained for operation.
  • the criterion against which the variable dependent on the resistance encountered by the drive is checked is selected such that the relative positions of the conveyor roller and the separating surface at which the variable meets the criterion is such that these positions are too far apart or too close together for operation.
  • the relative positions of the conveyor roller and the separating surface are adjusted further by a margin. This margin may be a fixed value or related to the relative positions of the conveyor roller and the separating surface.
  • Such a difference between the relative positions of the conveyor roller and separating surface when the criterion is met and the desired relative positions of the conveyor roller and separating surface during operation can be advantageous for a more accurate detection of a resistance encountered by the drive that meets the predetermined criterion.
  • a difference between the torque delivered to a conveyor roller driven in unloaded condition and the torque delivered to a conveyor roller driven while pressed against a sheet may only be measurable reliably if the distance between the conveyor roller and the separating surface is smaller than the distance between the conveyor roller and the separating surface in operating condition.
  • the control system 12 has a memory 40 for storing a setting value representing the position of the separating surface 9 relative to the conveyor roller 5.
  • the setting value representing the position to which the separating surface 9 has been adjusted can be stored in the memory 40 as a job setting, for instance in combination with other job settings.
  • the thickness of the circumferential surface 6 of the conveyor roller 5 and the separating surface 9 of the separating roller 8 may wear. Due to such wear, the actual relative position of the separating surface 9 relative to the section of the circumferential surface 6 of the conveyor roller 5 that faces the separating area 4 when adjusted in accordance with a given setting value may change. Moreover, changes in temperature and ageing of the material of the rollers 5, 8 may affect the position to which the separating surface needs to be adjusted for reliable operation, in particular, it may be required to position the separating surface 9 differently to exert the same normal force onto a sheet 3 extending in the separating area 4. Hence, in time, the optimal position of the conveyor roller 5 and the separating surface 9 may deviate from the stored position of the adjustment structure 10.
  • control system 12 is arranged for use in a calibration cycle to determine a reference position of the separating surface 9 relative to the conveyor roller 5.
  • the reference position is established by, prior to bringing a single specimen of the sheets to be separated in the separating area 4, carrying out at least once a calibration cycle.
  • a first step of the calibration cycle is to measure the variable dependent on resistance encountered by the drive 11, 24 driving rotation of the conveyor roller 5. Instead, a variable dependent on a contact force pressing the conveyor roller and the separating surface against each other may be measured.
  • An advantage of measuring a variable dependent on the contact force pressing the conveyor roller and the separating surface against each other is, that such a measurement does not require the conveyor roller to be driven so that rubbing of the conveyor roller over the separating surface can be avoided.
  • the contact pressure may for instance be measured by measuring the torque exerted by a drive of the adjustment structure while the adjustment structure is controlled for moving the separating surface to the conveyor roller. When the separating surface touches the conveyor roller, the torque exerted by the drive of the adjustment structure will increase. When the exerted torque reaches a predetermined value, the reference position has been reached and the drive is stopped or uncoupled or a slip coupling will slip.
  • the measured value of the variable dependent on resistance encountered by the drive 11, 24 or, where applicable, the variable dependent on a contact force pressing the conveyor roller and the separating surface against each other is checked against a predetermined criterion. If the measured value meets the predetermined criterion, a value representing the current position of the separating surface 9 relative to the conveyor roller 5 is stored as a reference position in a memory. If the measured value does not meet the predetermined criterion, the adjustment structure 10 is operated to adjust or to further adjust the position of the separating surface 9 relative to the conveyor roller 5 and to restart the calibration cycle.
  • the operating position of the separating surface 9 can thereafter be determined as a value relative to a reference position in which the separating surface 9 is in contact with the conveyor roller 5 with an, at least to a certain extent, predetermined contact pressure.
  • the value representing the operating position of the separating surface is made independent of manufacturing tolerances and wear of the conveyor roller and the separating surface 9.
  • the position of the separating surface 9 can be adjusted very accurately without the need of an adjustment cycle involving the presence of a test sheet 3 in the separating area by carrying out the calibration cycle once or more, until a new reference position has been found and subsequently adjusting the position of the separating surface to a position relative to the reference position in accordance with the stored value representing the operating position of the separating surface 9.
  • the control system 12 is arranged for generating a signal for warning the operator that the conveyor roller 5 and/or the separating surface 9 is/are worn too far. For example by causing a warning to be shown on a display. Alternatively or additionally, the control system 12 may be arranged to cause such a warning signal to be generated if a reference position is reached, but is located outside a predetermined range.
  • the conveyor roller(s) and the separating surface(s) may be positioned in positions that are mutually staggered in transport direction and/or perpendicularly to the transport direction, so that the sheets are to some extent flexed when engaged by the conveyor roller(s) and the separating surface(s) and the bending stiffness of the sheets influences the normal forces and thus the frictional forces exerted thereon.
  • the separating surface may also be provided in the form of one or more stationary surfaces instead of as a circumferential surface of a roller or the roller may be suspended stationary and optionally be rotatable manually to bring a fresh surface section in a position facing the separating area, if the surface section presently facing the separating area is worn out.
  • an apparatus and method according to the invention may also be applied in a so-called bottom feeder in which sheets are fed from a bottom end of a stack, or the sheets may be fed from either end of a stack that is oriented so as to have an essentially horizontal stacking direction.
  • the control system may be arranged to only signal to an operator that the adjustment structure must be operated to adjust the position of the conveyor roller and/or of the separating surface, either manually or by activating a drive displacing the conveyor roller and/or the separating surface.
  • the adjustment structure may also be arranged for adjusting the position of the separating surface relative to the conveyor roller by displacing the conveyor roller.
  • the relative positions of the separating surface and of the conveyor roller may be adjusted by displacing the separating surface and/or the conveyor roller.
  • the adjustment structure may be arranged for manually driven adjustment, for instance by turning a thumb wheel.
  • the control system 12 may then be arranged to cause the operator to be signaled in which direction to turn the wheel and whether a setting suitable for operation has been reached.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sheets, Magazines, And Separation Thereof (AREA)
EP06077330A 2006-12-28 2006-12-28 Verfahren und Vorrichtung zur Regelung und Kalibrierung des Abstandes zwischen einer Rolle und einer Reibvorrichtung eines Gerätes zur Trennung von Blättern von einem Stapel Withdrawn EP1939122A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP06077330A EP1939122A1 (de) 2006-12-28 2006-12-28 Verfahren und Vorrichtung zur Regelung und Kalibrierung des Abstandes zwischen einer Rolle und einer Reibvorrichtung eines Gerätes zur Trennung von Blättern von einem Stapel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP06077330A EP1939122A1 (de) 2006-12-28 2006-12-28 Verfahren und Vorrichtung zur Regelung und Kalibrierung des Abstandes zwischen einer Rolle und einer Reibvorrichtung eines Gerätes zur Trennung von Blättern von einem Stapel

Publications (1)

Publication Number Publication Date
EP1939122A1 true EP1939122A1 (de) 2008-07-02

Family

ID=37963927

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06077330A Withdrawn EP1939122A1 (de) 2006-12-28 2006-12-28 Verfahren und Vorrichtung zur Regelung und Kalibrierung des Abstandes zwischen einer Rolle und einer Reibvorrichtung eines Gerätes zur Trennung von Blättern von einem Stapel

Country Status (1)

Country Link
EP (1) EP1939122A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2060520A2 (de) * 2007-11-17 2009-05-20 manroland AG Verfahren zur Einstellung des Bremsspalts einer Verlangsamungsvorrichtung für Flachprodukte sowie hierfür eingerichtete Verlangsamungsvorrichtung

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55111337A (en) * 1979-02-15 1980-08-27 Fujitsu Ltd Automatic gap adjusting method for paper feeding roller
GB2156788A (en) * 1984-04-06 1985-10-16 Laurel Bank Machine Co Sheet feeding apparatus
US4603848A (en) * 1984-04-04 1986-08-05 Mathias Bauerle Gmbh Sheet separator including passage gap adjusting mechanism for separating sheets of various thicknesses from a stack of sheets
JPS62171849A (ja) * 1986-01-21 1987-07-28 Canon Inc シ−ト分離装置
JPH04197936A (ja) * 1990-11-29 1992-07-17 Oki Electric Ind Co Ltd 紙葉類分離給送装置における分離機構自動調整方法
JPH04333432A (ja) * 1991-05-10 1992-11-20 Nec Corp 紙葉類繰り出し装置
US5172900A (en) * 1990-04-27 1992-12-22 Hitachi Koki Co., Ltd. Paper feed mechanism
US5678817A (en) * 1994-09-19 1997-10-21 Canon Kabushiki Kaisha Sheet separating device with automatic adjustment of distance between feed roller and retard roller

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55111337A (en) * 1979-02-15 1980-08-27 Fujitsu Ltd Automatic gap adjusting method for paper feeding roller
US4603848A (en) * 1984-04-04 1986-08-05 Mathias Bauerle Gmbh Sheet separator including passage gap adjusting mechanism for separating sheets of various thicknesses from a stack of sheets
GB2156788A (en) * 1984-04-06 1985-10-16 Laurel Bank Machine Co Sheet feeding apparatus
JPS62171849A (ja) * 1986-01-21 1987-07-28 Canon Inc シ−ト分離装置
US5172900A (en) * 1990-04-27 1992-12-22 Hitachi Koki Co., Ltd. Paper feed mechanism
JPH04197936A (ja) * 1990-11-29 1992-07-17 Oki Electric Ind Co Ltd 紙葉類分離給送装置における分離機構自動調整方法
JPH04333432A (ja) * 1991-05-10 1992-11-20 Nec Corp 紙葉類繰り出し装置
US5678817A (en) * 1994-09-19 1997-10-21 Canon Kabushiki Kaisha Sheet separating device with automatic adjustment of distance between feed roller and retard roller

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2060520A2 (de) * 2007-11-17 2009-05-20 manroland AG Verfahren zur Einstellung des Bremsspalts einer Verlangsamungsvorrichtung für Flachprodukte sowie hierfür eingerichtete Verlangsamungsvorrichtung
EP2060520A3 (de) * 2007-11-17 2011-11-30 manroland AG Verfahren zur Einstellung des Bremsspalts einer Verlangsamungsvorrichtung für Flachprodukte sowie hierfür eingerichtete Verlangsamungsvorrichtung

Similar Documents

Publication Publication Date Title
JP2659314B2 (ja) シートの回転装置と、シートの方向づけの方法ならびにシート処理アセンブリ
US5785224A (en) Inserting apparatus and method using a snap-and-burst technique
JP4077245B2 (ja) 紙葉類取出装置
US8323162B2 (en) Method for correcting a skewed position of a product exiting a folding roller gap between two folding rollers of a longitudinal folding apparatus, and a longitudinal folding apparatus
JP5186131B2 (ja) 生地計量コンベア及び生地計量切断装置
JPS5813460B2 (ja) シ−ト複数オフセットグル−プ仕分け給送装置
US7380789B2 (en) Methods of moving a media sheet from an input tray and into a media path within an image forming device
JP4057859B2 (ja) 紙葉類取出装置
EP1939122A1 (de) Verfahren und Vorrichtung zur Regelung und Kalibrierung des Abstandes zwischen einer Rolle und einer Reibvorrichtung eines Gerätes zur Trennung von Blättern von einem Stapel
JP2006240773A (ja) ロール紙繰り出し装置及びロール紙繰り出し方法
US5429347A (en) Device for unit distribution of thin stacked objects
JP4488638B2 (ja) 紙葉類取出装置
JPH09278196A (ja) シート給送装置
JPH0867373A (ja) ベルト搬送装置の蛇行調整機構
JP4528078B2 (ja) 硬貨包装装置
JPH0752089A (ja) シートの自動切断装置
JP2009066114A (ja) ベルトループ用テープの状態検出装置
JP2000086027A (ja) シート材の巻取装置
CN220536710U (zh) 一种覆膜机除尘用宽幅输送装置
JP3090134B2 (ja) 給紙装置および方法
JPH033844A (ja) 紙葉類取扱い機構
JP3439154B2 (ja) チョッパ折装置
JPH07178695A (ja) シート類切断装置
JP2007076672A (ja) ラベル供給システム及びラベル装着システム
US20210339970A1 (en) Sheet feeding

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL BA HR MK RS

AKX Designation fees paid
REG Reference to a national code

Ref country code: DE

Ref legal event code: 8566

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20090106