EP3521229B1 - Dispositif tampon pour système de transport, système de transport et procédé de fonctionnement - Google Patents

Dispositif tampon pour système de transport, système de transport et procédé de fonctionnement Download PDF

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Publication number
EP3521229B1
EP3521229B1 EP18155152.4A EP18155152A EP3521229B1 EP 3521229 B1 EP3521229 B1 EP 3521229B1 EP 18155152 A EP18155152 A EP 18155152A EP 3521229 B1 EP3521229 B1 EP 3521229B1
Authority
EP
European Patent Office
Prior art keywords
flat objects
deposit
belt conveyor
buffer
conveyor
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.)
Active
Application number
EP18155152.4A
Other languages
German (de)
English (en)
Other versions
EP3521229A1 (fr
Inventor
Robert Barrer
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.)
MULTIGRAF AG
Original Assignee
MULTIGRAF AG
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 MULTIGRAF AG filed Critical MULTIGRAF AG
Priority to EP18155152.4A priority Critical patent/EP3521229B1/fr
Publication of EP3521229A1 publication Critical patent/EP3521229A1/fr
Application granted granted Critical
Publication of EP3521229B1 publication Critical patent/EP3521229B1/fr
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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
    • B65H83/00—Combinations of piling and depiling operations, e.g. performed simultaneously, of interest apart from the single operation of piling or depiling as such
    • B65H83/02—Combinations of piling and depiling operations, e.g. performed simultaneously, of interest apart from the single operation of piling or depiling as such performed on the same pile or stack
    • B65H83/025—Combinations of piling and depiling operations, e.g. performed simultaneously, of interest apart from the single operation of piling or depiling as such performed on the same pile or stack onto and from the same side of the pile or 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
    • B65H29/00—Delivering or advancing articles from machines; Advancing articles to or into piles
    • B65H29/24—Delivering or advancing articles from machines; Advancing articles to or into piles by air blast or suction apparatus
    • B65H29/241—Suction devices
    • B65H29/242—Suction bands or 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
    • B65H29/00—Delivering or advancing articles from machines; Advancing articles to or into piles
    • B65H29/52—Stationary guides or smoothers
    • 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
    • B65H3/56—Elements, e.g. scrapers, fingers, needles, brushes, acting on separated article or on edge 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
    • B65H31/00—Pile receivers
    • B65H31/04—Pile receivers with movable end support arranged to recede as pile accumulates
    • B65H31/08—Pile receivers with movable end support arranged to recede as pile accumulates the articles being piled one above another
    • B65H31/10—Pile receivers with movable end support arranged to recede as pile accumulates the articles being piled one above another and applied at the 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
    • B65H43/00—Use of control, checking, or safety devices, e.g. automatic devices comprising an element for sensing a variable
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H9/00—Registering, e.g. orientating, articles; Devices therefor
    • B65H9/16—Inclined tape, roller, or like article-forwarding side registers
    • B65H9/163—Tape
    • 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
    • B65H2301/421—Forming a pile
    • B65H2301/4213—Forming a pile of a limited number of articles, e.g. buffering, forming bundles
    • 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
    • B65H2301/44—Moving, forwarding, guiding material
    • B65H2301/446—Assisting moving, forwarding or guiding of material
    • B65H2301/4461—Assisting moving, forwarding or guiding of material by blowing air towards handled material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2402/00—Constructional details of the handling apparatus
    • B65H2402/10—Modular constructions, e.g. using preformed elements or profiles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2404/00—Parts for transporting or guiding the handled material
    • B65H2404/20—Belts
    • B65H2404/26—Particular arrangement of belt, or belts
    • B65H2404/264—Arrangement of side-by-side belts
    • B65H2404/2641—Arrangement of side-by-side belts on movable frame
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2404/00—Parts for transporting or guiding the handled material
    • B65H2404/20—Belts
    • B65H2404/26—Particular arrangement of belt, or belts
    • B65H2404/269—Particular arrangement of belt, or belts other arrangements
    • B65H2404/2691—Arrangement of successive belts forming a transport path
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2404/00—Parts for transporting or guiding the handled material
    • B65H2404/70—Other elements in edge contact with handled material, e.g. registering, orientating, guiding devices
    • B65H2404/74—Guiding means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2405/00—Parts for holding the handled material
    • B65H2405/10—Cassettes, holders, bins, decks, trays, supports or magazines for sheets stacked substantially horizontally
    • B65H2405/11—Parts and details thereof
    • B65H2405/114—Side, i.e. portion parallel to the feeding / delivering 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
    • B65H2406/00—Means using fluid
    • B65H2406/30—Suction means
    • B65H2406/32—Suction belts
    • B65H2406/323—Overhead suction belt, i.e. holding material against gravity
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/10—Handled articles or webs
    • B65H2701/17—Nature of material
    • B65H2701/176—Cardboard

Definitions

  • the invention relates to a buffer device for stacking flat objects that are supplied via a conveyor system, a conveyor system with at least one such buffer device, and an operating method for such a buffer device.
  • a system which comprises a first and a second printer, from which sheets of paper are fed to a mixing module which has a sheet rotor, by means of which the sheets can be rotated by 90°.
  • input buffers and output buffers are provided, from which the sheets are removed or into which the sheets are deposited.
  • the mixing module comprises a plurality of controllable switches and at least one mixing path along which the sheets are brought together and at least one bypass path along which the sheets can be guided from a first work station directly to a second work station.
  • a conveying device which allows sheets fed to a receiving device to be pneumatically coupled to a conveyor belt and fed to any delivery device.
  • Known output buffers also have the disadvantage that the objects fed to the stack are often subjected to undesired stresses. In particular, objects with low strength can suffer undesirable deformations. An imprint that may have been completely dried can be altered in a disadvantageous manner.
  • the EP2711318A1 discloses a device which serves to convey sheet material, comprising control means for controlling the conveying process, at least one conveyor belt with air ducts provided therein and at least one pneumatic device which can be connected to the air ducts of the conveyor belt, so that sheets fed in from a receiving device are pneumatically connected the conveyor belt can be coupled and fed to a dispensing device.
  • the EP2385007A2 discloses a suction and conveying system for sucking and conveying an object, comprising means for generating a negative pressure caused by an air vortex for sucking the object and means for conveying the sucked object.
  • the aspiration and conveyance system can be arranged to face an edge of a stack of items to aspirate and convey items from the stack.
  • the US2008111297A1 discloses a sheet feeding apparatus used in an image forming apparatus such as a printer, a facsimile machine, a copying machine, and a multifunctional peripheral having corresponding functions.
  • the present invention is therefore based on the object of creating an improved buffer device which is suitable for stacking flat objects arriving along a conveyor axis, an improved conveyor system with such a buffer device and an improved operating method for this buffer device.
  • the buffer device provided for stacking flat objects is intended to avoid undesired effects on the flat objects being conveyed, so that, for example, flat objects with low strength can be conveyed without suffering any deformation.
  • the surface of the flat objects should not be changed either.
  • conveyor systems according to the invention which are equipped with at least one such buffer device, should be able to be constructed flexibly and cost-effectively, so that the customer's investments result in maximum benefit.
  • the running axis of the at least one endless belt is inclined by an angle of inclination in relation to the conveying axis, so that a transverse force pointing to the guide element acts on the transported flat objects.
  • incoming flat objects can be recorded in a material-friendly manner, precisely guided and placed on a stack.
  • the flat objects are sequentially coupled to the belt conveyor by means of the suction device and supported by the air flow emitted by the blowing device, practically on an air cushion, to the storage position.
  • the decoupling from the belt conveyor can take place before reaching or after reaching the storage position.
  • the flat objects remain aligned in one plane due to the air flow emitted by the blowing device, so that curvatures and folds are avoided. Since the storage position is further away from the blowing device than the pick-up position at which the flat objects are coupled to the belt conveyor, the flat object in the storage position can gently sink onto the already present stack with flat objects.
  • the flat objects are treated as gently as possible. Deformation and contamination of the flat objects are avoided. In particular, changes to a coating that may not yet have fully solidified or contamination are avoided.
  • the flat objects can be conveyed quickly and precisely.
  • the coupling to the at least one endless belt allows the flat Transport objects powerfully and at high speed.
  • a plurality of endless belts are provided, between which openings, for example longitudinal slots, preferably running in the conveying device, are provided through which air is sucked.
  • the flat objects are therefore coupled to a number of endless belts that ensure reliable transport.
  • the suction device comprises at least one suction unit and the blowing device comprises at least one blowing unit.
  • the suction unit and the blowing unit are preferably in the form of a fan having an electric motor and a rotor or propeller.
  • the air flow of the suction device and/or the air flow of the blowing device can preferably be controlled manually or electronically in terms of intensity and/or cross-section and/or can be selectively switched on or off.
  • the air flow of the suction device can preferably be switched on or off by means of a flap which is driven by a flap motor.
  • the coupling of the flat objects to the belt conveyor and/or the decoupling from the belt conveyor can preferably be selectively controlled or influenced by actuating the flap motor. Sliders can also be used to advantage, by means of which the air flow can be changed, d. H. whose cross-section and/or intensity can be controlled and/or switched on or off.
  • the blowing device preferably has at least one slide, which can be actuated to adapt the width and/or height of the cross section of the air flow to the dimensions and/or the weight of the flat objects.
  • the pressing force with which the flat objects are pressed against the belt conveyor is preferably set by controlling the suction unit or by controlling an electric motor provided in the suction unit.
  • the intensity of the air flow of the blower device is adjusted by controlling the at least one blower unit or the electric motor. It is also possible to use several suction units or blower units that can be switched on or off individually. A higher intensity of the air streams of the suction device and/or the blowing device is set for flat objects with a higher grammage.
  • the flat objects Due to the inclination of the belt conveyor at the end against the guide element, the flat objects are subjected to a required force or transverse force moved against the guide element, such as a side wall or a ruler.
  • the inclination preferably takes place in a plane parallel to the guided flat objects.
  • the angle of inclination which is preferably set taking into account the dimensions and the weight of the flat objects, is preferably ⁇ 10° and is, for example, in the range of 3°-6°.
  • the various parts of the buffer device in particular the belt conveyor, the suction device, the blowing device and the at least one guide element can be connected to a mounting structure in a fixed, displaceable and/or rotatable manner.
  • the belt conveyor can be rotated by a rotating device connected to the mounting structure in one plane continuously or stepwise in one or more steps in a rotating range relative to the conveying axis, preferably in one and/or the other direction by the selectable angle of inclination -a and/or +a , which is preset or selectable.
  • a servomotor preferably a stepping motor, is preferably provided, by means of which the desired rotation can be set.
  • the control device includes a control program, by means of which the buffer device can preferably be operated selectively in one or more operating modes.
  • planar objects arriving along a conveying axis are deposited on the deposit and when operating as an inbound buffer, planar objects are removed from the deposit or from the stack and delivered along the transport axis.
  • the flat objects lying at the top of the stack are fanned out by the air flow emitted by the blowing device and separated from one another at least at the front.
  • the uppermost flat object is coupled to the belt conveyor and carried away by the latter by means of the suction device.
  • the air flow emitted by the blowing device supports the further Coupling to the belt conveyor and complete separation of the coupled flat object from the other objects in the stack.
  • a separating device with a blocking element is preferably provided, which can be displaced in the region of a transfer height in which a flat object to be released is separated from subsequent flat objects.
  • the blocking element can be adjusted manually, e.g. by means of a slider or cable, or electrically by means of a servomotor. For example, the space below the belt conveyor is monitored optically and the blocking element is moved up if necessary.
  • a control circuit is provided, with a sensor coupled to the control device, preferably an optical or mechanical sensor, and a lifting drive coupled to the control device and provided for driving the shelf, which can be controlled by means of the control circuit in such a way that the respective uppermost flat Object of the stack on the shelf, which can be displaced by means of the drive along a displacement axis perpendicular to the belt conveyor, can be regulated to the transfer height monitored by the sensor.
  • the position of the shelf is therefore regulated in such a way that the top edge of the stack is always at the transfer height at which flat objects can be added or removed. If flat objects are added, the stack is preferably lowered step by step. If flat objects are removed, the stack is moved upwards. In this way, it is possible to remove or precisely position flat objects exactly at the placement position and at the transfer height. If necessary, adjustments are made according to the selected operating mode. When operating as an output buffer, the transfer height can be lower.
  • a buffer device is used as an output buffer or stacker in a conveyor system
  • an input buffer can be implemented with minimal effort using the technology according to the invention.
  • the conveyor system can therefore be inexpensive with practically uniform technology, i. H. an output buffer and an equivalent input buffer.
  • the buffer device according to the invention can be switched over to different operating modes, which can be selected and implemented using the control device.
  • the buffer device according to the invention can be converted from an input buffer to an output buffer and back by changing the operating mode.
  • the buffer device according to the invention can also be constructed either only as an input buffer and/or only as an output buffer with only minimal changes.
  • the buffer device has device features or device elements that are configured identically, with the same function or as mirror images. Due to the use of largely identical device parts, these can be procured, stored and assembled with greatly reduced effort.
  • buffer devices according to the invention are integrated into a conveyor system as a mirror image as an input buffer and as an output buffer, e.g. to ensure accessibility of the operating means on only one side of a process line, then again almost all parts of the device can be used identically. In this case, it is preferably provided that mechanical parts are designed symmetrically and are inserted in the input buffer or output buffer in the appropriate orientation.
  • the buffer device according to the invention therefore has the advantage that input buffers and output buffers for conveyor systems can be made available with little or no material expenditure. Conveyor systems with one or more process lines can therefore be implemented with significantly reduced effort. This has the additional advantage that the buffer device handles the flat objects optimally in its function as an input buffer or as an output buffer.
  • Buffer devices according to the invention can not only be used optionally, but extended processes can also be carried out. Flat objects can be moved back and forth via process lines and, for example, processed several times. Due to the flexibility of the buffer devices according to the invention, the number of devices can normally also be reduced. For example, with six bimodal buffer devices, a process line can be implemented in a conveyor system, which has, for example, one input buffer and five output buffers or five input buffers and one output buffer. On the other hand, if only unimodal buffer devices were used, five input buffers and five output buffers and thus a total of ten unimodal buffers would have to be used Buffer devices are available to realize the same configurations of the conveyor system.
  • FIG. 1 shows a buffer device 10 according to the invention, which serves as an output buffer for the stacking of planar objects 71, 72, . . .
  • a unimodal buffer device 10 is present if the buffer device serves only as an output buffer or stacker.
  • the buffer device 10 is bimodal, ie can be switched between two operating modes in which it can be used as an output buffer or as an input buffer or dispenser or feeder for delivering stacked flat objects 71, 72, . That is, the buffer device 10 shown can optionally receive flat objects 71, 72 and add them to the stack 7 or remove them from the stack 7 and deliver them.
  • the working processes of the processing device can be controlled by means of a control device 8 . If available, the different operating modes can also be selected and implemented by the control device 8 . In other words, the control device 8 can switch the buffer device 10 from the “output buffer” operating mode to the “input buffer” operating mode.
  • the control device 8 can be controlled by the user or by a central computer, for example via a touch screen.
  • the control device 8 can be integrated into a wired or wireless network and connected to other devices of the Communicate conveyor system.
  • the control device 8 has an operating program 81, by means of which the buffer device 10 is controlled. It is shown symbolically that the program flow has program sequences for a first and a second operating mode MODE1, MODE2.
  • Each buffer device 10 comprises a mounting structure 6 which supports the individual device parts.
  • the assembly structure 6 typically has columns, traverses and/or plates, which optionally also serve as the cladding or as a housing for the buffer device 10 .
  • the buffer device 10 includes a belt conveyor 1 for transporting flat objects 71, 72; a suction device 2 for sucking or coupling the flat objects 71, 72 to the belt conveyor 1 and a blowing device 3 for forming an air flow below the belt conveyor 1, which acts as an air cushion for incoming flat objects 71, 72 or for fanning out or separating the objects on the stack 7 overhead flat objects 71, 72 is used.
  • a separating device 4 is preferably provided, by means of which the uppermost flat object 71 can be separated from a subsequent flat object 72 using a blocking element 43 when flat objects 71, 72 are removed from the stack 7.
  • the belt conveyor 1, the suction device 2, the blowing device 3 and the separation suggestion 4 can preferably be controlled individually.
  • Each of the devices mentioned can be controlled manually or automatically, e.g. by the control device 8 .
  • the belt conveyor 1 has four endless belts 12, each held by a pair of rollers or belt rollers 11, by means of which incoming flat objects 71, 72, . . . can be transported sequentially in one direction or the other.
  • the belt rollers 11 are each coupled via a coupling 150 to a belt motor 15, which can preferably be selectively controlled by the control device 8 in order to rotate the endless belts 12 forwards or backwards at a desired speed (see, e.g 6 ).
  • the conveying axis of the buffer device 10 which normally corresponds to the conveying axis of the conveying system, is indicated with a first arrow ⁇ 10.
  • This conveying axis ⁇ 10 runs parallel to a guide element 9 which is connected to the mounting structure 6 in the form of a guide plate.
  • the flat objects 71, 72 should always be guided along this guide element 9 so that they can be stacked precisely and also removed again and guided to the outside.
  • the running direction ⁇ 1 of the belt conveyor 1 is inclined in a plane parallel to the upper side of the stack 7 and thus parallel to the support 51 by the angle of inclination ⁇ with respect to the conveying axis ⁇ 10. i.e. the belt conveyor 1 is rotated against the guide element 9 by the angle ⁇ .
  • the flat objects 71, 72 are therefore guided precisely along the guide element 9, preferably up to a stop 94.
  • the angle of inclination ⁇ can be fixed or, if the belt conveyor 1 is rotatably mounted by means of a rotary device 19, it can be adjusted manually or by means of a servomotor 190 (see Fig 2 ). Provision is preferably made for the belt conveyor 1 to be rotatable by the angle +/- ⁇ in one direction or the other, so that the flat objects 71, 72 are always pushed against the guide element 9 when moving in and out and are guided precisely by it.
  • the running speed of the endless belts 12 is optionally adjustable.
  • the suction device 2 connected to the belt conveyor 1, by means of which incoming flat objects 71, 72 are sucked against the endless belts 12 and coupled to them, is preferably likewise controllable.
  • the air flow can be switched on and off completely and/or its intensity can be controlled in order to couple flat objects 71, 72 to or decouple them from the endless belts 12 with a desired pressing force.
  • the blowing device 3 can also be controlled, so that the width and/or height of the cross-section of the air flow can be adjusted.
  • the adjustment of the width of the air flow makes it possible to support incoming flat objects 71, 72 of a corresponding width or to separate flat objects 71, 72 of a corresponding width lying on the stack 7 from one another. If provided, the adjustment of the height and, if necessary, the radiation angle of the air flow allows an adaptation to the respective conveying process.
  • the air flow for supporting incoming flat objects can be upwards are shifted and for the separation of flat objects 71, 72 are shifted downwards on the stack 7. It is normally sufficient if the planar objects 71, 72 can be separated reliably.
  • Adjusting the airflow for the stacking process is less critical. That is, with bimodal buffer devices 10, it is usually sufficient to optimize the airflow for the input buffer mode.
  • the air flow is preferably changed by moving a perforated slider 33 (see 2 ), which can be moved back and forth in a blowing channel 30 by means of a control button 35 in order to open or close wall openings 320 of a channel wall 32 facing the stack 7 .
  • the blocking element 43 of the separating device 4 can preferably also be adjusted manually or automatically.
  • the blocking element 43 can be moved by means of a separating slide 42, which can be moved by means of a control button 41 (see FIG 2 ), down and up to ensure that only a flat object 71 leaves the buffer device 10.
  • the height of the stack 7 lying on the shelf 51 changes. So that the conveying processes described, in particular the coupling to the belt conveyor 1, succeed reliably, the upper edge of the stack 7 or the uppermost flat object 71 is controlled by a control loop maintained at a desired transfer height. This position of the uppermost flat object 71 is measured by an optical sensor 56 and reported to the control device 8, which subsequently controls the lifting drive 52 and moves the tray 51 up or down until the specified transfer height is reached. This ensures that the air streams of the suction device 2 and the blowing device 3 always act in the same way on the flat object 71 to be transported and that the depositing process or removal process runs identically in each case. In preferred configurations, this transfer height can be specified as desired.
  • the guidance of the flat objects 71, 72 is determined by the guide element 9.
  • the end stop 94 ensures that the stacked flat objects 71, 72 are flush at the end.
  • a guide blade 93 is additionally provided, which is held by a carriage 92, which can be displaced along a traverse 91 and can be selectively fixed by means of a locking element 921.
  • FIG 2 shows a from the buffer device 10 of FIG 1 extracted subsystem, namely the belt conveyor 1, the suction device 2 coupled to it, parts of the blowing device 3 and separately the air slide 33 and the separating slide 42.
  • the air slide 33 and the separating slide 42 have teeth on the left-hand side, into which the associated control button 35 or 41 connected gears 34 or 44 can engage. With the rotation of the control knob 35 or 41, the slides can therefore be moved axially.
  • the air slide 33 has 3 slide openings 331, 332, 333 of different sizes, which can be displaced relative to the wall openings 320 in the duct wall 32 of the blowing device 3.
  • the first slide opening 331 ensures that the associated wall opening near the belt conveyor 1 is always open. If the air slide 33 is moved further, the adjacent wall opening 320 is opened, and if the air slide 33 is moved further, the last wall opening 320 is opened, so that flat objects 71, 72 of maximum width can be served.
  • the separating slide 42 has an inclined slot opening 421 in which a cam 431 held by the blocking element 43 is guided.
  • the cam 431 moves downwards or upwards with the blocking element 43 which is held in a vertically displaceable manner.
  • the control knob 41 By turning the control knob 41, the blocking element 43 can thus be adjusted to the desired height.
  • the belt conveyor 1 is in 2 shown from below.
  • the front half of cover 16 is cut away.
  • On the right side there is a suction unit 21 which, depending on the position of an air flap actuated by a flap motor 22, draws in air through a suction channel 20 which has longitudinal slots 201 running parallel to it on the underside between the endless belts 12. Air is therefore sucked in below the belt conveyor 1 through the longitudinal slots 201 and carried away via the suction channel 20 .
  • flat objects 71, 72 can therefore be sucked in and pulled against the endless belts 12 and conveyed away by them.
  • Figure 3a shows the subsystem of 2 with the activated blower device 3, by means of which an air flow emitted by a blower unit 31 through the blower channel 30 and further through the slide openings 331, 332, 333 and the wall openings 320, if they are superimposed, outwards against the Upper edge of a stack 7 provided on the tray 51 of flat objects 71, 72 is guided.
  • the blow channel 30 is separated by a vertical section along the conveying axis, so that the view into the interior is clear.
  • the cover 16 of the belt conveyor 1 has also been removed.
  • the air flow from the blower device 3 forms an air cushion for the incoming flat objects 71 .
  • the flat objects 71, 72, 73 lying on top of the stack 7 are fanned out and at least partially separated from one another.
  • stack 7 or its upper edge is preferably regulated to a lower transfer height h T at which the flat objects 71, 72, 73 is avoided.
  • Figure 3b shows the subsystem of Figure 3a with the additionally activated suction device 2, by means of which a supplied flat object 71 is picked up by the belt conveyor 1 and guided over the stack 7 or an isolated flat object 71 is picked up by the belt conveyor 1 on the shelf 51 and released to the outside.
  • the buffer device 10 serves as an exit buffer and the coupled flat object 71 is moved over the stack, it is ensured that an air cushion results below the flat object 71 and a flat object 72 of the stack 7 does not get in between.
  • the stack 7 is preferably regulated to a lower transfer height h T by means of the lifting device 5 in this mode of operation.
  • a transfer height h T is selected at which the fanning out of the flat objects 71, 72, 73 on the upper side of the stack 7 is guaranteed.
  • FIG 4 shows the subsystem of 2 additionally with the tray 51 on which a stack 7 with flat objects 71, 72 is shown schematically arranged.
  • the left side of the partial system is along the section line A--A of 1 cut away.
  • the air flap 221 driven by the flap motor 22 is provided inside the intake duct 20 .
  • the air is either drawn in from the left side through the endless belts 12 of the belt conveyor 1 or from the right side or from the outside through the suction channel 20 to the suction unit 21.
  • the air flap 221 shown the air is sucked in from the belt conveyor 1 through the endless belts 12 of the belt conveyor 1 .
  • the air flow or the vacuum is suddenly switched on or off by means of the air flap 221, so that flat objects 71 can be coupled to or decoupled from the endless belts 12 practically without delay.
  • the intensity of the air flow is adjusted by controlling the suction unit 21 or the electric motor provided therein.
  • FIG. 4 shows that a flat object 71 is coupled to the belt conveyor 1, while the flat object 72 lying underneath is held back by the blocking element 43.
  • the transported flat objects 71 are monitored by an ultrasonic detector with an ultrasonic transmitter 88 and an ultrasonic receiver 89 . If two flat objects 71, 72 have passed the blocking element 43, this is reported to the control device 8 by the ultrasonic detector.
  • blower unit 31 also shows the suction unit 21 and the blower unit 31.
  • blower units 31 are preferably provided, by means of which it is ensured that a uniform air flow is emitted over the entire required cross section.
  • Figure 5a , Figure 5b and 6 show schematically conveyor systems 100 with a first buffer device 10' serving as an input buffer and a second buffer device 10 serving as an output buffer. Parts of the buffer device in 10, 10' that are not necessary for the following description or have already been discussed have been removed or cut away.
  • Figure 5a shows a conveyor system 100 according to the invention with two largely identical unimodal or bimodal buffer devices 10, 10', which are rotated by 180° relative to one another and are separated from one another by interfaces 101, between which any process line can be inserted.
  • the buffer devices 10, 10' can preferably be operated selectively in the input buffer or output buffer mode. At least one of the buffering devices 10 is configured as a fixed or selectable output buffer. If there are two bimodal buffer devices 10, 10', the flat objects 71, 72 can be transported back and forth in both directions as desired.
  • the guide element 9, along which the flat objects 71, 72 are guided, is shown schematically with a line for each of the two buffer devices 10, 10'. Due to the inclination of the belt conveyor 1 at the end against the associated guide element 9, the flat objects are pushed against the guide element 9, e.g. a side wall or a ruler, with a force Fa. The inclination preferably takes place in a plane parallel to the guided flat objects 71, 72.
  • the belt conveyors 1 of the two buffer devices 10, 10' are inclined by the angle of inclination ⁇ in one direction and the other relative to the conveying axis ⁇ 10 or ⁇ 10' are rotated so that the flat objects 71, 72 are pressed against the respective guide element 9 with a transverse force Fa or -Fa.
  • the main component of the force which the belt conveyor 1 exerts on the flat objects 71, 72 which is several times larger, acts in the direction of the conveying axis ⁇ 10 or ⁇ 10′ and ensures powerful conveying .
  • the transverse force Fa or -Fa therefore ensures the precise guidance of the flat objects 71, 72 and can be adjusted accordingly by adjusting the angle of inclination ⁇ .
  • the two buffer devices 10, 10' therefore differ essentially by the inverse operation as an output buffer or input buffer and by the described setting of the angle of inclination ⁇ , which can be done in different ways.
  • the belt conveyor 1 is rotatable by a rotating device 19 connected to the mounting structure 6 and a servomotor 190 .
  • the belt conveyor 1 can also be rotatably mounted by means of a normally vertically aligned shaft and rotated manually against one or the other stop. This stop can preferably be adjusted by an adjusting element.
  • the belt conveyor 1 is fixed in the end stop.
  • the belt conveyor 1 is provided with a magnet on both sides, which can be placed in the corresponding position of the belt conveyor 1 eg on the plate-shaped guide element 9 powerfully adheres.
  • the buffer device 10, 10' By changing the operating program 81 (see 1 ) and by automatic or manual adjustment of the belt conveyor 1, the buffer device 10, 10' according to the invention can thus easily be converted from an output buffer to an input buffer and vice versa.
  • the buffer devices 10, 10' can be configured absolutely identically.
  • FIG. 10 shows the conveyor system 100 of FIG Figure 5a in spatial representation.
  • the process lines 1000 can have any process modules A, B, C, D.
  • FIG. 1 shows a conveyor system 100 with two unimodal or bimodal buffer devices 10, 10′ formed as mirror images of one another. Since the guide elements 9 of both buffer devices 10, 10' are now on the same side of the conveying axis ⁇ 100 of the guide system 100, the belt conveyors 1 of both buffer devices 10, 10' are rotated by the angle of inclination ⁇ in the same direction. It can be seen that the belt conveyors 1 can be constructed with the same parts of the device. If care is taken to ensure that the assembly elements, for example the suction channel 20, are constructed symmetrically, they can be used in both configurations of the buffer devices 10, 10'. It can be provided that assembly openings for the device parts, for example for the suction unit 21 or the flap motor 22 are provided in the unmirrored and the mirrored assembly position. Device parts designed in this way can be used universally.
  • FIG. 12 further shows that the endless belts 12 are driven by a drive motor or belt motor 15, which is preferably actuated by the control device 8.
  • the belt motor 15 is connected to the drive shaft 111 of the belt rollers 11 by a clutch 150 .
  • the same drive shaft 111 is provided on both sides of the belt conveyor 1, so that the belt motor 15 can be coupled on both sides without additional effort. Since mirrored or non-mirrored use is possible for functionally relevant device parts, this is possible for practically all device parts of the buffer device 10, 10'. If there is a deviation from the symmetry, there is nevertheless a reduced effort for the mirroring. With buffer devices 10, 10' according to the invention, conveyor systems 100 can therefore be implemented at significantly reduced costs. In addition, an advantageous flexibilization of the conveyor systems 100 is possible.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Delivering By Means Of Belts And Rollers (AREA)

Claims (15)

  1. Dispositif tampon (10) pour l'empilage d'objets plats (71, 72, ...) en papier, carton ou plastique arrivant le long d'un axe de transport (x10) dans une position de dépose sur un dépôt (51), comprenant
    a) un dispositif de commande (8) pour commander le processus d'empilage;
    b) un convoyeur à bande (1) avec au moins une bande sans fin (12) entraînée par des rouleaux de bande (11), au moyen de laquelle des objets plats (71, 72, ...) arrivant peuvent être transportés de manière séquentielle en direction de la position de dépôt;
    c) un dispositif d'aspiration (2) relié au convoyeur à bande (1), au moyen duquel des objets plats (71, 72, ...) arrivant peuvent être aspirés contre l'au moins une bande sans fin (12) et être couplés à celle-ci;
    d) un dispositif de soufflage (3), au moyen duquel un courant d'air dirigé vers le dépôt (51) peut être guidé le long du côté de l'au moins une bande sans fin (12) qui est orienté vers les objets plats (71, 72, ...) qui arrivent;
    caractérisé en ce que le dispositif comprend en outre
    e) au moins un élément de guidage (9) le long duquel un objet plat (71) couplé au convoyeur à bande (1) peut être guidé le long d'un axe de guidage (x10), de préférence jusqu'à une halte (94), dans la position de dépose;
    où l'axe de marche (×1) de la au moins une bande sans fin (12) est incliné d'un angle d'inclinaison (a) par rapport à l'axe de transport (x10), de sorte qu'une force transversale (Fa) dirigée vers l'élément de guidage (9) agit sur les objets plats transportés (71, 72, ...) .
  2. Dispositif tampon (10) selon la revendication 1, caractérisé en ce qu'une boucle de régulation est prévue, avec un capteur (56) couplé au dispositif de régulation (8) et un entraînement (52) couplé au dispositif de régulation (8) et prévu pour actionner le dépôt (51), qui peut être commandé au moyen de la boucle de régulation de telle sorte que l'objet plat (71) respectivement le plus haut de la pile (7) sur le dépôt (51), qui peut être déplacé au moyen de l'entraînement (52) le long d'un axe de déplacement perpendiculaire au convoyeur à bande (1), peut être réglé à une hauteur de transfert (hT) surveillée par le capteur (56).
  3. Dispositif tampon (10) selon la revendication 1 ou 2, caractérisé en ce que le convoyeur à bande (1), le dispositif d'aspiration (2), le dispositif de soufflage (3) et l'au moins un élément de guidage (9) sont reliés de manière fixe, déplaçable ou rotative à une structure de montage (6).
  4. Dispositif tampon (10) selon la revendication 3, caractérisé en ce que le convoyeur à bande (1) peut être tourné par un dispositif de rotation (19) relié à la structure de montage (6) dans un plan de manière continue ou au moins en une étape dans une zone de rotation par rapport à l'axe de transport (x10) dans une direction et/ou dans l'autre direction, de l'angle d'inclinaison (-a, +a) pouvant de préférence être sélectionné.
  5. Dispositif tampon (10) selon une des revendications 1 - 4, caractérisé en ce que le transfert d'air à travers le dispositif d'aspiration (2) peut de préférence être activé sélectivement par un volet (221) relié à un moteur de volet (22), de sorte que les objets plats (71, 72, ...) peuvent être sélectivement couplés ou découplés du convoyeur à bande (1), la force avec laquelle les objets plats (71) sont pressés contre la au moins une bande sans fin (12) étant de préférence réglable en commandant une unité d'aspiration (21) du dispositif d'aspiration (2).
  6. Dispositif tampon (10) selon une des revendications 1 - 5, caractérisé en ce que la section transversale du flux d'air du dispositif de soufflage (3) est réglable en largeur et/ou en hauteur au moyen d'un dispositif de réglage (32, 33, 35), qui comprend de préférence au moins un coulisseau (33).
  7. Dispositif tampon (10) selon la revendication 6, caractérisé en ce que le dispositif de commande (8) comprend un programme de commande (81) au moyen duquel le dispositif tampon (10) peut être réglé sélectivement pour fonctionner comme un tampon de sortie pour l'empilage d'objets plats (71, 72, ...) arrivant le long d'un axe de transport (x10) sur le dépôt (21) ou pour fonctionner comme un tampon d'entrée pour le désempilage d'objets plats (71, 72, ...) du dépôt (21) et leur déchargement le long de l'axe de transport (x10).
  8. Dispositif tampon (10) selon la revendication 7, caractérisé en ce qu'il est prévu un dispositif de séparation (4) avec un élément de blocage (43), qui est déplaçable dans la zone de la hauteur de transfert (hT) pour séparer un objet plat (71) à dispenser des objets plats suivants (72, ...) .
  9. Système de transport (100) avec au moins un dispositif tampon (10) selon une des revendications 1 - 8, qui est relié à une rue de processus (1000) comprenant au moins une unité de processus (A ; B ; C ; D) et qui sert au dépôt d'objets plats (71, 72, ...) arrivant le long d'un axe de transport (x10) et/ou au désempilage d'objets plats (71, 72, ...) du dépôt (21) et à leur déchargement le long de l'axe de transport (×10).
  10. Système de transport (100) selon la revendication 9, caractérisé en ce que, du côté de l'entrée de la rue de processus (1000), un premier dispositif tampon (10') fonctionnant comme un tampon de sortie selon l'une des revendications 1 à 8 est connecté et en ce que, du côté de la sortie de la rue de processus (1000), un deuxième dispositif tampon (10) fonctionnant comme un tampon d'entrée selon l'une des revendications 1 à 8 est connecté.
  11. Système de transport (100) selon la revendication 9 ou 10, caractérisé en ce que le mode de fonctionnement des dispositifs tampons (10, 10') connectés à la ligne de traitement (1000) en tant que tampon de sortie ou tampon d'entrée est sélectivement configurable.
  12. Système de transport (100) selon la revendication 10 ou 11, caractérisé en ce que le premier dispositif tampon (10') et le deuxième dispositif tampon (10) dans leur ensemble ou au moins dans l'étendue du convoyeur à bande (1), le dispositif d'aspiration (2) et le dispositif de soufflage (3) sont conçus de manière au moins approximativement identique ou au moins approximativement inversée.
  13. Procédé pour faire fonctionner un dispositif tampon (10) pour l'empilage d'objets plats (71, 72, ...) en papier, carton ou plastique arrivant le long d'un axe de transport (x10) dans une position de dépose sur un dépôt (51), comprenant
    a) un dispositif de commande (8) pour commander le processus d'empilage;
    b) un convoyeur à bande (1) avec au moins une bande sans fin (12) entraînée par des rouleaux de bande (11), au moyen de laquelle des objets plats (71, 72, ...) arrivant peuvent être transportés de manière séquentielle en direction de la position de dépôt;
    c) un dispositif d'aspiration (2) relié au convoyeur à bande (1), au moyen duquel des objets plats (71, 72, ...) arrivant peuvent être aspirés contre l'au moins une bande sans fin (12) et être couplés à celle-ci;
    d) un dispositif de soufflage (3), au moyen duquel un courant d'air dirigé vers le dépôt (51) peut être guidé le long du côté de l'au moins une bande sans fin (12) qui est orienté vers les objets plats (71, 72, ...) qui arrivent; et
    e) au moins un élément de guidage (9) le long duquel un objet plat (71) couplé au convoyeur à bande (1) peut être guidé le long d'un axe de guidage (x10), de préférence jusqu'à une halte (94), dans la position de dépose;
    où l'axe de marche (×1) de la au moins une bande sans fin (12) est incliné d'un angle d'inclinaison (a) par rapport à l'axe de transport (x10), de sorte qu'une force transversale (Fa) dirigée vers l'élément de guidage (9) agit sur les objets plats transportés (71, 72, ...) .
  14. Procédé de fonctionnement selon la revendication 13, caractérisé en ce que le convoyeur à bande (1) est mis en rotation par un dispositif de rotation (19) relié à la structure de montage (6) dans un plan de manière continue ou par étapes, jusqu'à ce que l'angle d'inclinaison prédéterminé (-a, +a) par rapport à l'axe du convoyeur (×10) soit atteint.
  15. Procédé de fonctionnement selon la revendication 13 ou 14, caractérisé en ce que le dispositif de commande (8) comprend un programme de commande (81) au moyen duquel le dispositif tampon (10) est réglé sélectivement, à savoir pour un fonctionnement en tant que tampon de sortie pour l'empilage d'objets plats (71, 72, ...) arrivant le long d'un axe de transport (×10) sur le dépôt (21) ou pour un fonctionnement en tant que tampon d'entrée pour le désempilage d'objets plats (71, 72, ...) du dépôt (21) et leur déchargement le long de l'axe de transport (×10).
EP18155152.4A 2018-02-05 2018-02-05 Dispositif tampon pour système de transport, système de transport et procédé de fonctionnement Active EP3521229B1 (fr)

Priority Applications (1)

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EP3521229B1 true EP3521229B1 (fr) 2022-04-06

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Publication number Priority date Publication date Assignee Title
JP4327996B2 (ja) 2000-06-20 2009-09-09 藤倉ゴム工業株式会社 シリンダ装置
US7706737B2 (en) 2005-11-30 2010-04-27 Xerox Corporation Mixed output printing system
JP4810407B2 (ja) * 2006-11-15 2011-11-09 キヤノン株式会社 シート給送装置及び画像形成装置
US9079733B2 (en) * 2010-05-07 2015-07-14 Bdt Media Automation Gmbh Vortex suction separator device
EP2711318B1 (fr) * 2012-09-25 2015-08-12 Multigraf AG Dispositif et procédé de transport de feuilles ainsi que le système de transport
JP6443733B2 (ja) * 2014-11-04 2018-12-26 株式会社リコー 給紙装置、画像形成装置および画像形成システム

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