EP3597580B1 - Fördervorrichtung zum fördern von flexiblen bögen - Google Patents

Fördervorrichtung zum fördern von flexiblen bögen Download PDF

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Publication number
EP3597580B1
EP3597580B1 EP18724932.1A EP18724932A EP3597580B1 EP 3597580 B1 EP3597580 B1 EP 3597580B1 EP 18724932 A EP18724932 A EP 18724932A EP 3597580 B1 EP3597580 B1 EP 3597580B1
Authority
EP
European Patent Office
Prior art keywords
sheets
support means
wheels
sheet
displacement
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
EP18724932.1A
Other languages
English (en)
French (fr)
Other versions
EP3597580C0 (de
EP3597580A1 (de
Inventor
Rob Van der Snoek
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.)
Simon Corrugated Machinery SL
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Simon Corrugated Machinery SL
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Publication date
Application filed by Simon Corrugated Machinery SL filed Critical Simon Corrugated Machinery SL
Publication of EP3597580A1 publication Critical patent/EP3597580A1/de
Application granted granted Critical
Publication of EP3597580B1 publication Critical patent/EP3597580B1/de
Publication of EP3597580C0 publication Critical patent/EP3597580C0/de
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Anticipated expiration legal-status Critical

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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
    • 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
    • B65H5/00—Feeding articles separated from piles; Feeding articles to machines
    • B65H5/22—Feeding articles separated from piles; Feeding articles to machines by air-blast or suction device
    • B65H5/222—Feeding articles separated from piles; Feeding articles to machines by air-blast or suction device by suction devices
    • B65H5/224—Feeding articles separated from piles; Feeding articles to machines by air-blast or suction device by suction devices by suction 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
    • B65H29/26—Delivering or advancing articles from machines; Advancing articles to or into piles by dropping the articles
    • B65H29/32—Delivering or advancing articles from machines; Advancing articles to or into piles by dropping the articles from pneumatic, e.g. suction, carriers
    • 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
    • B65H29/58—Article switches or diverters
    • B65H29/62—Article switches or diverters diverting faulty articles from the main streams
    • 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
    • B65H29/70—Article bending or stiffening arrangements
    • 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
    • B65H31/24—Pile receivers multiple or compartmented, e.d. for alternate, programmed, or selective filling
    • 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
    • B65H2301/50—Auxiliary process performed during handling process
    • B65H2301/51—Modifying a characteristic of handled material
    • B65H2301/512—Changing form of handled material
    • B65H2301/5121—Bending, buckling, curling, bringing a curvature
    • B65H2301/51214—Bending, buckling, curling, bringing a curvature parallel to direction of displacement of 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
    • B65H2404/00—Parts for transporting or guiding the handled material
    • B65H2404/10—Rollers
    • B65H2404/13—Details of longitudinal profile
    • B65H2404/134—Axle
    • B65H2404/1342—Built-up, i.e. arrangement for mounting axle element on roller body
    • B65H2404/13421—Built-up, i.e. arrangement for mounting axle element on roller body involving two elements, i.e. an element at each end of roller body
    • 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
    • B65H2404/10—Rollers
    • B65H2404/15—Roller assembly, particular roller arrangement
    • B65H2404/154—Rollers conveyor
    • 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
    • B65H2404/25—Driving or guiding arrangements
    • B65H2404/251—Details of drive roller
    • 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
    • B65H2404/25—Driving or guiding arrangements
    • B65H2404/255—Arrangement for tensioning
    • 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
    • B65H2406/31—Suction box; Suction chambers
    • B65H2406/312—Suction box; Suction chambers incorporating means for transporting the handled material against suction force
    • B65H2406/3122—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
    • B65H2406/00—Means using fluid
    • B65H2406/30—Suction means
    • B65H2406/31—Suction box; Suction chambers
    • B65H2406/312—Suction box; Suction chambers incorporating means for transporting the handled material against suction force
    • B65H2406/3124—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
    • 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
    • B65H2406/00—Means using fluid
    • B65H2406/30—Suction means
    • B65H2406/35—Other elements with suction surface, e.g. plate or wall
    • B65H2406/351—Other elements with suction surface, e.g. plate or wall facing the surface of the handled material

Definitions

  • the device for transporting flexible sheets of the present invention belongs to those that enable transporting flexible sheets of the kind used in the graphic arts sector or the packaging industry between different handling stations.
  • flexible sheets In the graphic arts sector or the packaging industry, it is common practice to transport flexible sheets, for example between a feeding station and a printing station or between a rotary sheeter and a stacking station.
  • the rotary sheeter formats materials initially wound on a reel, and therefore flexible, in the longitudinal direction, such that after the sheets have been cut in a transverse direction, they must be transported for subsequent stacking or handling.
  • These flexible sheets are made of materials such as paper, cardboard, plastic or similar, and particularly of single-sided corrugated cardboard, which consists of two sheets of paper one flat sheet or " liner " and one corrugated sheet or " fluting " .
  • the transport takes place in a controlled manner so that the sheets are well positioned in the stacking station or other handling stations, such as a printing station, and that they do not curl up on each other during transport due to lack of rigidity in the longitudinal direction thereof, which at the same time is the transport direction, instead of remaining flat.
  • the device described in this document does not allow these flexible sheets to be transported at high speeds, because the air currents generated while transporting each flexible sheet can separate the sheet from the device, initially bending the front edge thereof and finally separating the sheet from the device, causing the sheet to move out of the longitudinal direction of transport and to be arranged obstructing the passage of other sheets.
  • This situation requires the intervention of an operator in order to remove the sheet that obstructs the passage, it being necessary to stop the transport device, thus entailing the corresponding loss of time.
  • Document JP2008266020A discloses a device according to the preamble of the appended claim 1.
  • Said known device comprises two flat conveyor belts, placed with different inclinations, for retaining portions of each flexible sheet during its transportation, forcing each sheet to bend between the conveyor belts and adopt a curved position.
  • special care has to be taken when placing the conveyor belts, taking into consideration the speed, size and flexibility of the sheets, for not overbending or damaging the sheets during its transportation. Therefore, once the conveyor belts are placed, the size, flexibility and speed of the sheets to be transported cannot be easily changed. Also, since the air currents generated between the conveyor belts while transporting each flexible sheet can separate the sheet from the device, sheets must be transported at relative low speeds.
  • Document JPS63196450 discloses a movable tray type sorter with a plurality of trays with curved surface where sheets can be stored.
  • Document US2009/212484A1 discloses a paper ejecting device for ejecting sheets of paper from a machine to a paper receiving tray, for correcting the curling of the printed sheet during ejection.
  • Document US5006042A discloses an apparatus for feeding paperboards from a stack through a feed gate, comprising three parallel rows of frictional wheels.
  • WO 2013/160399 A1 discloses a device for transporting flexible sheets, comprising:
  • the device for transporting flexible sheets of the present invention belongs to the kind that combines movable support means on which a sheet can be placed and which are adapted to move the sheet in a direction of displacement, preferably straight and preferably horizontal; and suction means for maintaining the sheet placed against the support means.
  • the support means are configured so that a sheet placed against the support means takes on a bent shape in a transverse plane to the direction of displacement, which can be for example fluted or tile-shaped.
  • the bent shape can be either convex or concave, as well as being corrugated, having convex sections and concave sections, enabling advantageously that the sheet be able to move maintaining the bent shape thus increasing resistance to bending at the front part thereof and supporting greater accelerations and speeds, without separating from the device and without being damaged.
  • the bent shape has a curve, the ratio of which between the chord and the sagitta is less than 100, i.e., 100 sagittas or less fit in the chord, such that the trajectory variation of the curve is high enough to allow the sheet to be sufficiently bent so that resistance to bending in the direction of transport is achieved.
  • the bent shape has a curve, the ratio of which between the chord and the sagitta is greater than 10, i.e., 10 sagittas or more fit in the chord, such that the trajectory variation of the curve is low enough to allow the sheet to be sufficiently bent but without damaging it.
  • the bent shape has a curve, the ratio of which between the chord and the sagitta is lesser than 100 and greater than 10, i.e., that between 10 and 100 sagittas fit in the chord, such that it provides the sheets with good resistance to bending in the longitudinal direction of transport without damaging them.
  • the bent shape has a curve, the sagitta of which is greater than 20 millimeters, said shape being suitable for transporting the flexible sheet of cardboard in bent or fluted shape.
  • the movable support means comprise drive shafts that are parallel to each other, perpendicular to the direction of displacement of the sheets and that follow a curved trajectory in the transverse plane to the direction of displacement of the sheets, said shafts being provided with wheels. Said wheels determine a transport surface of the sheets through which the sheets can be transported when being pushed by the wheels.
  • Each drive shaft can be independently actuated by a motor, thus being able to control the rotational speed of each shaft such that the sheets can be accelerated or slowed down, progressively increasing or decreasing the rotating speed of consecutive shafts, as appropriate.
  • This speed control can be managed by a computer through which instructions are sent to the different motors that actuate the shafts, as well as other support means, such as a conveyor belt.
  • the curved trajectory that each drive shaft follows in the transverse plane thereof to the direction of displacement of the sheets is equal to the curve of the transport surface on that same transverse plane.
  • the drive shafts comprise straight sections, the ends of which are connected to rotating transmission parts coupled to both sides of a same wheel, thus allowing the rotation of all the wheels of a shaft, thus allowing the rotation to be transmitted to all the wheels of a same shaft.
  • the wheels are provided with side inlets for coupling the rotating transmission parts, which allow the rotation of the section to be transmitted to the wheel and the wheel to transmit the rotation to the next section through the transmission part thereof.
  • the profile of the rotating transmission parts and of the inlets of the wheels is complementary, in a variant of interest the complementary profile being a gearwheel complementary profile.
  • the wheels are made of a material that is more flexible than the rotating transmission parts, thus allowing the consecutive straight sections to vary the trajectory of the shaft when the rotating transmission parts are slightly deformed by the wheel inlets.
  • the wheels be made of polyurethane or of any other flexible material.
  • the device further comprises ejection means of defective sheets, arranged between the shafts, such that when said ejection means are actuated by an operator, it pushes a defective sheet to remove it from the device. It is highlighted that by being able to slightly separate the sheet from the device, it will disengage, enabling it to fall into a rejection container underneath the ejection means.
  • ejection means should preferably be retractable i.e., being able to be concealed inside the device and they can comprise a pneumatic piston which, when actuated, enables quickly pushing out the sheet from the device and removing the ejection means, thus removing only the defective sheet and preventing the rest of the sheets, which are not defective, from being ejected.
  • the support means in the direction of displacement comprise a conveyor belt, which allows better control of the sheets, especially for braking and precise positioning.
  • the device can comprise an acceleration section in which the movable support means comprise drive shafts that are parallel to each other, perpendicular to the direction of displacement of the sheets and that follow a curved trajectory in the transverse plane to the direction of displacement of the sheets, said shafts being provided with wheels, and an end section in which the support means comprise a conveyor belt, thus allowing the sheets to be able to increase or decrease their speed in the acceleration section according to the actuation of the different drive shafts, maintaining the sheets attached to the device, and that, at the end section, the sheets can be better controlled, held more firmly and even released by deactivating the suction means in this end section, for example for stacking thereof.
  • the movable support means comprise drive shafts that are parallel to each other, perpendicular to the direction of displacement of the sheets, said shafts being provided with wheels, and an end section in which the support means comprise a conveyor belt, sufficient transport of the sheets could be achieved even if these were not bent, i.e., if they were transported flat, although in this case they would not withstand speeds and accelerations as high as when they are bent.
  • the previously described devices could also be considered, in which the movable support means on which a sheet can be placed and which are adapted to move the sheet in a direction of displacement, would be configured so that a sheet placed against the support means would take on a flat shape in a transverse plane to the direction of displacement, although they would not withstand speeds and accelerations as high as when they are bent.
  • the device of the present invention therefore enables carrying out a method for transporting flexible sheets that comprises placing a flexible sheet against movable support means that are adapted to move the sheet in a direction of displacement, and maintain the sheet against the support means by means of suction means, such that the sheet takes on a bent shape in a transverse plane to the direction of displacement, i.e., the method for transporting flexible sheets comprises bending the sheets in a transverse plane to the direction of displacement, thus providing greater resistance to the sheets against bending at the front during transport and allowing them to be transported at higher speeds and accelerations.
  • Figures 1a and 1b show a bottom view and a sectional view of a first variant embodiment of the device 1 for transporting flexible sheets 2 of the present invention, which has movable support means 3 on which a sheet 2 can be placed and which are adapted to move the sheet in a direction of displacement, for transporting a sheet 2 or a sequence of sheets 2 between different stations.
  • the sheets will be transported preferably suspended or hung from the device 1, i.e., arranged between the device 1 and the floor, enabling an operator to better visualize the transport of the sheets from floor level.
  • the movable support means 3 are wheels 8 arranged on shafts 7 that enable pushing the sheets 2 during transport thereof.
  • a plate 19 is arranged between the shafts 7 and the sheets 2, such that the wheels 8 traverse the plate 19 through windows 20 suitably performed on the plate 19, which allow the wheels 18 to protrude and push the sheets 2 in the direction of transport, as shown in Figure 1 .
  • the same plate 19 has holes 21 through which air can be sucked in, such that suction means 5, which can be made up of one or more air extractors 22, allow the sheets 2 to be placed against the support means 3, i.e., against the wheels 8.
  • the plate 19 also has ejection means 25 of defective sheets 2, which when actuated, preferably by means of a pneumatic piston that would be actuated for example when an operator detects a defective sheet 2, protrude from the plate 18 causing the sheet 2 to be removed from the device 1.
  • the movable support means 3 comprise drive shafts 7 that are parallel to each other, perpendicular to the direction of displacement of the sheets 2 and that follow a curved trajectory in the transverse plane to the direction of displacement of the sheets 2, said shafts being provided with wheels 8 that determine the transport surface 4 of the sheets.
  • each shaft 7 is actuated by a different motor and can rotate at different speeds, such that it enables varying the transport speed of the sheets 2, accelerating or slowing down the sheets 2 so they can be displaced at greater or lesser speed and separated or joined together, without the increase in speed causing the sheets 2 to separate from the device 1 and block the passage of other sheets 2.
  • each drive shaft 7 in the transverse plane thereof to the direction of displacement of the sheets 2 is equal to the curve 6 of the transport surface of that same transverse plane, such that all the wheels 8 of a same shaft 7, having the same radius, rotate at the same angular speed and will drive the sheet 2 at the same speed along the entire shaft 7, providing the sheet 2 with a curved 6 shape.
  • the movable support means 3 are configured so that the sheets 2 placed against the support means 3 take on a bent or fluted shape in a transverse plane to the direction of displacement, i.e., they take on a tile shape that provides the sheets 2 with greater resistance to bending at the front part thereof when being transported at high speeds between different stations, without damaging them.
  • the sheets 2 will preferably maintain an essentially straight shape in a longitudinal direction to the direction of displacement, so that they do not offer resistance to transport thereof.
  • the support means 3 determine a surface 4 for transport of the sheets 2 which in turn has a bent or fluted shape, the section of this transport surface 4 determining, in a transverse plane to the direction of displacement of the sheets 2, a curve 6, which can be either convex or concave, or even a combination between convex and concave portions that form a corrugation.
  • a curve 6 which can be either convex or concave, or even a combination between convex and concave portions that form a corrugation.
  • the support means 3 can be discreet, such as an assembly of wheels 8 shown in Figures 1a and 1b , the ends of which would determine the transport surface 4 as continuous, such as a conveyor belt 12, which allows air to pass through it and which would determine the transport surface 4, such as a perforated belt or a net or mesh, for example a metallic mesh, as described below.
  • the holes 21 in the plate 19 are distributed between the wheels 8 of the support means 3, thus achieving that the force exerted by the suction means 5 is distributed evenly along the shaft 7.
  • the support means 3 are arranged such that the transport surface 4 determines a curve 6, which will be the shape that the sheets 2 take on during transport thereof.
  • the bent shape they take on has a curve 6, the ratio of which between the chord c and the sagitta s is less than 100, i.e., the distance of the chord c is 100 times or less the distance of the sagitta s, in other words, 100 sagittas or less fit in the cord.
  • the support means 3 will have this same curved 6 shape and for example the shafts 7 will follow the same curve 6 as the plate 19.
  • the sheets 2 are flexible, it is advisable that the sheets 2 do not take on an excessively bent shape since they could become damaged.
  • the bent shape has a curve 6, the ratio of which between the chord c and the sagitta s is greater than 10, i.e., the distance of the chord c is 10 times or more the distance of the sagitta s, in other words, 10 sagittas or more fit in the chord.
  • the bent shape has a curve 6, the sagitta s of which is greater than 20 millimeters, such that the device 1 is especially suitable for transporting standard sized flexible sheets 2.
  • FIG. 3 shows a transverse section view of the device 1 according to the present invention together with a detail of the device 1 in which it can be seen how the support means 3 and the suction means 5 are combined.
  • the drive shafts 7 are mounted passing through supports 23 of the plate 19 and comprise straight sections 9, the ends of which are connected to rotating transmission parts 10 coupled to both sides of a same wheel 8, said wheels being provided with side inlets 11 for coupling the rotating transmission parts 10, such that the shaft 7 is curved.
  • This curvature of the shaft 7 is achieved by slightly deforming, through pressure, the rotating transmission parts 10 of the wheels 8, which are foreseen to be more flexible than the rotating transmission parts 10, such as polyurethane.
  • the rotating transmission parts 10 of the wheels are foreseen to be made of a more rigid material, such as polyethylene, polyoxymethylene, and other plastics or even of a metallic material or also any other material that is more rigid than the material of the inlets 11 of the wheels 8. It is foreseen that the deformation exerted by the rotating transmission parts 10 on the wheels 8 allows consecutive straight sections 9 to be rotated by approximately 0.5 degrees, such that the rotation of the straight section 9 is correctly transmitted to the wheels 8. It is also foreseen that the rotating transmission parts 10 can fit into the side inlets 11 of the wheels 8 such that the rotating transmission parts 10 can move axially inside each inlet 11, alternatively inward and outward of the wheel 8, during the shaft 7 rotation. Naturally, it is foreseen that the entire wheel 8 is not made of this flexible material, but that it may be sufficient that only the area of the inlets 11 be made of this flexible material.
  • the suction means 5 incorporate an extractor 22 that exerts a suctioning effect through the holes 21 of the plate 19 that enables maintaining the sheet 2 against the support means 3.
  • the suction means 5 are made up of different extractors, such that suction can be controlled in different sections of the device 1, for example by allowing the sheet 2 to be released at the end of the transport thereof.
  • the support means 3 are provided with wheels 8, and the plate 19 has windows 20 through which the wheels 8 pass, it is possible that the plate 19 not require holes 21 if the suction exerted by the suction means 5 through the windows 20 is sufficient.
  • the sheets 2 can be transported in a suspended manner, being the movable support means 3, such as wheels 8, which by rotating enable the sheets 2 to be displaced along a transport surface 4, which when taking on a curved or tile shape, advantageously allow the flexible sheets 2 to be transferred at higher speeds than if the sheets 2 were flat, preventing them from being separated from the device 1.
  • FIG 4 shows a detailed view of the section of the wheels 8 of the device 1 of Figure 3 in correlative fitting position with straight segments 9 of the shaft 7.
  • the ends of the straight sections 9 are provided with a threaded pin 14, which will pass through an orifice 15 in each rotating transmission part 10 in which a nut 13 is secured, such that the straight section 9 is firmly joined to the rotating transmission part 10, thus achieving that by rotating the shaft 7, each straight section 9 rotates the rotating transmission parts 10 joined to the ends thereof.
  • the rotating transmission parts 10 are adapted to fit and be coupled into the side inlets 11 arranged on both sides of the wheels 8, such that the straight section 9 that is actuated by a motor transmits the rotation to the remaining straight sections 9 through the respective wheels 8.
  • the material around the side inlets 11 is flexible and allows successive straight sections 9 to be slightly inclined to one another when this material around the side inlets yields, but allowing the rotation to be transmitted correctly both to the wheel 8 and to the next straight section 9 of the shaft 7.
  • the securing of the straight sections 9 to the rotating transmission parts 10 can be carried out in other alternative ways, which ensure fastening of the straight sections 9 to the rotating transmission parts 10, such as a grooved shaft, a tapered shaft, or even a shaft integrated during the molding process of the rotary transmission part 10, among others.
  • the profile of the rotating transmission parts 10 and of the inlets 11 of the wheels 8 is complementary, such that the rotation of the straight sections 9 can be transmitted to the wheel 8, which can transmit it to the next straight section 9 through the rotating transmission parts 10.
  • a particularly advantageous form of the profile of the rotating transmission parts 10 and of the inlets 11 of the wheels 8 is a complementary gearwheel profile, as shown in Figure 5 and as was also shown in Figures 3 and 4 , although it was not evident from the sectional views that were provided. Nevertheless, other complementary profiles that would allow the rotation to be correctly transmitted could be used, such as geometrical shapes or other irregular shapes that enable the fitting between the rotating transmission parts 10 and the inlets 11 of the wheels 8 and the rotating transmission of the shaft 7. It should also be noted that the profiles of the inlets 11 of the wheels 8 that are shown are the same and have a gearwheel on both sides, which makes it possible to use the same rotating transmission parts 10, one of the inlets 11 being rotated with respect to the other.
  • Figure 6a shows another variant embodiment of the device 1 in which the support means 3 comprise a conveyor belt 12, such as a conveyor belt that allows air to pass through, such that the suction means 5 allow the sheet to be placed against the conveyor belt 12 and transferred on the transport surface 4, which in this case coincides with the conveyor belt 12.
  • the support means 3 were made up by different shafts 7 that could rotate at a different speed
  • the conveyor belt 12 will move forward at a same speed, it being impossible to accelerate sheets to separate them from each other by means of a single device 1.
  • One option to solve this drawback would be to arrange different devices 1 in series, such that the conveyor belt 12 of each device 1 has a higher or lower speed than the previous one, depending on whether the sheets 2 are to be accelerated or slowed down.
  • the conveyor belt 12 be made up of different longitudinal belts, for example 10 longitudinal belts measuring 40 mm each, provided with flexible, homokinetic couplings, among them, such that they follow the bent shape and they can all be dragged by means of a single motor.
  • the sectional view of the variant of Figure 6a in which the support means 3 comprise a conveyor belt 12 will also have a curved section that allows the sheets 2 to be transported in tile shape, such that it allows greater speed to be achieved without damaging the sheets 2, as described above, the suction means 5 being adapted to exert a suction force that maintains the sheet 2 against the conveyor belt.
  • the conveyor belt 12 which can be a belt or any other transport surface that allows air to pass through, such as a mesh or a grille, may be actuated by means of a single motor.
  • the support means 3 can have different sections, i.e., that in certain sections the support means 3 are made up of shafts 7 provided with wheels 8, such that the speed of each shaft 7 can be controlled independently in order to separate or join consecutive sheets 2, for example in an acceleration section T1 and other sections made up of a conveyor belt 12, such that although the speed of the conveyor belt 12 is the same, a single motor can be used to actuate the belt, for example, in a end section T2, as described below.
  • Figure 7 shows a system made up of a device 1 of the present invention for transporting sheets 2 between a rotary sheeter 16 and a stacking station 17.
  • the rotary sheeter 16 is adapted to format materials initially wound on a reel and therefore flexible in the longitudinal direction, by cutting sheets 2 from the material previously wound on the reel in the transverse direction thereof.
  • the rotary sheeter 16 provides the flexible sheets 2 to the device 1 one by one, which although initially flat on the support means 3, as indicated in section A of Figure 8a , the support means 3 will progressively bend the flexible sheet 2, reaching a curvature as indicated in section B, shown in Figure 8b , until it takes on the curved tile shape indicated in section C and shown in Figure 8c .
  • This bent shape will allow transport thereof at high speed as described above so that, before reaching the stacking station 17 where it should be presented flat, the sheet 2 returns from its curved transport position to the final flat position, adapted for storage thereof at the stacking station 17.
  • the system shown in Figure 7 uses a rotary sheeter 16 and a stacking station 17 of the kind known in the state of the art that provide and require straight sheets 2 so it is necessary to make this transition between the flat and curved transport position of the sheets 2.
  • the rotary sheeter 16 would already provide curved sheets 2, similar to section C, the device 1 could take and transport the curved sheets 2 directly without needing to curve them progressively.
  • the stacking station 17 if, for example, the sheets 2 were simply flat when separated from the device 1.
  • the sheets 2 take on the bent tile shape, not only do they prevent being separated from the device 1 during transport thereof, but they also prevent the sheets, obtained from initially wound material, from having a tendency to rewind.
  • the device 1 has an acceleration section T1 in which the support means 3 will be made up of shafts 7 provided with wheels 8, such that the speed of each shaft 7 can be controlled independently in order to separate or join consecutive sheets 2, and an end section T2 made up of a conveyor belt 12, such that although the speed of the conveyor belt 12 is the same, a single motor can be used to actuate the belt.
  • the support means 3 could also be integrally made up of shafts 7 provided with wheels 8 or by one or more conveyor belts 12, as well as different combinations of sections.
  • the sheets 2 are transported preferably suspended or hung from the device 1, i.e., arranged between the device 1 and the floor, enabling an operator not only to be able to better visualize the transport of the sheets from the floor, but also enabling the transport of sheets 2, such as single-sided corrugated cardboard with the open flute upwards, thus achieving the stacking thereof with the open flute upwards, which is preferably how they have to be provided to the end customer.
  • the device 1 i.e., arranged between the device 1 and the floor
  • Figure 9 shows another system made up of a device 1 of the present invention for transporting sheets 2 between a stacking station 17, at which an assembly of flexible sheets 2 is stacked, and a printing station 18 at which the device 1 must transfer the sheets 2.
  • the stacking station 17 will provide the flexible sheets 2 to the device 1 one by one, which although initially flat on the support means 3, as indicated in section A previously shown in Figure 8a , the support means 3 will progressively bend the flexible sheet 2, reaching a curvature as indicated in section B, shown previously in Figure 8b , until it takes on the curved tile shape indicated in section C and previously shown in Figure 8c , which will allow transport thereof at high speed as described above so that, before reaching the printing station 18 where it should be presented flat, the sheet returns from its curved transport position to the final flat position, adapted for insertion in the printing station.
  • the system shown in Figure 7 uses a staking station 17 and a printing station 18 of the kind known in the state of the art that provide and require straight sheets 2, so it is necessary to make this transition between the flat and curved transport position.
  • the feeding station would already provide curved sheets 2, similar to section C, the device 1 could take and transport the curved sheets 2 directly without needing to curve them progressively.
  • the printing station 18 if it would accept bent sheets 2.
  • the device 1 of the present invention can be used for transporting sheets 2 between many other types of stations, such as laminating stations, among others.
  • Figure 10 shows the device 1 of the present invention again, now between a stacking station 17 and a stack distribution station 24, allowing the sheets 2 to be transported from the stacking station 17 as described previously but now releasing the sheets 2 after passing an acceleration section T1 and upon reaching an end section T2, grouping the sheets two by two or even into larger groups in order to thus be able to redistribute the sheets 2, which were previously staked at the stacking station 17, into different stacks at the stack distribution station 24, such that the size of each stack is smaller and the sheets can subsequently be moved more easily.
  • the device 1 will wait for three sheets 2 to reach the end section T2 of the device 1 and then the suction means 5 of the end section T2 will be deactivated, and/or pushing means such as protrusions that protrude from the transport surface 4 to separate the sheets 2 of the transport surface 4 will be actuated, allowing the sheets 2 to be stacked up each in a stack of the stack distribution station 24.
  • the device will also allow transport between a rotary sheeter 16 and a stack distribution station 24, in a similar way.
  • the flexible sheets 2 are transported in suspended manner, the support means 3 remaining above the sheets 2, it is also foreseen that in other variant embodiments, the flexible sheets 2 remain above the support means 3, for example when the device is mounted directly on the floor.
  • the flexible sheets 2 when transported in suspended manner, they can easily be monitored by an operator, such that defective sheets 2 can be detected visually.
  • These defective sheets 2 could be removed from the device 1 by the operator's actuation of sheet ejection means 25, such as a pneumatic piston protruding from the support means 3, such that the defective sheet 2 can be released from the device 1 and fall into a rejection vessel underneath the pneumatic piston.
  • the support means would determine a flat transport plane and would be configured so that a sheet placed against the support means would take on a flat shape with respect to a transverse plane to the direction of displacement.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Delivering By Means Of Belts And Rollers (AREA)
  • Sheets, Magazines, And Separation Thereof (AREA)
  • Advancing Webs (AREA)

Claims (15)

  1. Vorrichtung (1) zu Fördern von flexiblen Bögen (2), umfassend:
    - bewegliche Stützmittel (3), auf welchen ein Bogen platziert werden kann und welche dazu angepasst sind, den Bogen in einer Verschiebungsrichtung zu bewegen; und
    - Saugmittel (5), um den Bogen gegen die Stützmittel platziert zu halten;
    wobei die Stützmittel derart ausgebildet sind, dass ein gegen die Stützmittel platzierter Bogen eine gebogene Form in einer Querebene zur Verschiebungsrichtung einnimmt; wobei die Vorrichtung dadurch gekennzeichnet ist, dass die beweglichen Stützmittel Antriebswellen (7) umfassen, welche parallel zueinander sind, senkrecht zur Verschiebungsrichtung der Bögen, und welche eine gekrümmte Bahn in der Querebene zur Verschiebungsrichtung der Bögen folgen, wobei die genannten Wellen mit Rädern (8) versehen sind.
  2. Vorrichtung (1) nach dem vorhergehenden Anspruch, dadurch gekennzeichnet, dass die gebogene Form eine Kurve aufweist, deren Verhältnis zwischen der Sehne (c) und dem Sinus (s) kleiner als 100 ist.
  3. Vorrichtung (1) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die gebogene Form eine Kurve aufweist, deren Verhältnis zwischen der Sehne (c) und dem Sinus (s) größer als 10 ist.
  4. Vorrichtung (1) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die gebogene Form eine Kurve aufweist, deren Sinus (s) größer als 20 Millimeter ist.
  5. Vorrichtung (1) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die gekrümmte Bahn, welche jede Antriebswelle (7) in der Querebene derselben zur Verschiebungsrichtung der Bögen folgt, der Kurve (6) der Förderoberfläche auf der gleichen Querebene gleich ist.
  6. Vorrichtung (1) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Antriebswellen (7) gerade Abschnitte (9) umfassen, deren Enden mit rotierenden Übertragungsteilen (10) verbunden sind, welche mit beiden Seiten des gleichen Rads (8) gekoppelt sind.
  7. Vorrichtung (1) nach dem vorhergehenden Anspruch, dadurch gekennzeichnet, dass die Räder (8) mit seitlichen Einlässen (11) für die Kopplung der rotierenden Übertragungsteile (10) versehen sind.
  8. Vorrichtung (1) nach dem vorhergehenden Anspruch, dadurch gekennzeichnet, dass das Profil der rotierenden Übertragungsteile (10) und der Einlässe (11) der Räder (8) komplementär ist.
  9. Vorrichtung (1) nach dem vorhergehenden Anspruch, dadurch gekennzeichnet, dass das Profil der rotierenden Übertragungsteile (10) und der Einlässe (11) der Räder (8) ein mit einem Getrieberad komplementäres Profil ist.
  10. Vorrichtung (1) nach einem der Ansprüche 6 bis 9, dadurch gekennzeichnet, dass die Räder (8) aus einem Material hergestellt sind, welches flexibler als die rotierenden Übertragungsteile (10) ist.
  11. Vorrichtung (1) nach dem vorhergehenden Anspruch, dadurch gekennzeichnet, dass die Räder (8) aus Polyurethan hergestellt sind.
  12. Vorrichtung (1) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass sie zusätzlich Auswurfmittel (25) zum Auswerfen der Bögen (2) umfasst, welche zwischen den Wellen (7) angeordnet sind.
  13. Vorrichtung (1) nach dem vorhergehenden Anspruch, dadurch gekennzeichnet, dass die Auswurfmittel (25) einen pneumatischen Kolben umfassen.
  14. Vorrichtung (1) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Stützmittel (3) in der Verschiebungsrichtung ein Förderband (12) umfassen.
  15. Vorrichtung (1) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass sie einen Beschleunigungsabschnitt (T1) umfasst, in welchem die beweglichen Stützmittel (3) Antriebswellen (7) umfassen, welche parallel zueinander sind, senkrecht zur Verschiebungsrichtung der Bögen (2) sind und welche eine gekrümmte Bahn in der Querebene zur Verschiebungsrichtung der Bögen (2) folgen, wobei die genannten Wellen mit Rädern (8) und einem Endabschnitt (T2), in welchem die Stützmittel ein Förderband (12) umfassen, versehen sind.
EP18724932.1A 2017-03-17 2018-03-07 Fördervorrichtung zum fördern von flexiblen bögen Active EP3597580B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ES201730361A ES2681961B1 (es) 2017-03-17 2017-03-17 Dispositivo y procedimiento para el transporte de láminas flexibles
PCT/ES2018/070170 WO2018167343A1 (es) 2017-03-17 2018-03-07 Dispositivo y procedimiento para el transporte de láminas flexibles

Publications (3)

Publication Number Publication Date
EP3597580A1 EP3597580A1 (de) 2020-01-22
EP3597580B1 true EP3597580B1 (de) 2023-06-07
EP3597580C0 EP3597580C0 (de) 2023-06-07

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EP18724932.1A Active EP3597580B1 (de) 2017-03-17 2018-03-07 Fördervorrichtung zum fördern von flexiblen bögen

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EP (1) EP3597580B1 (de)
ES (2) ES2681961B1 (de)
WO (1) WO2018167343A1 (de)

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CN113173442B (zh) * 2020-01-18 2024-03-29 长兴县泗安民丰彩印厂 一种瓦楞纸板复合输出设备及其生产线

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Also Published As

Publication number Publication date
ES2681961A1 (es) 2018-09-17
EP3597580C0 (de) 2023-06-07
ES2681961B1 (es) 2019-06-27
ES2949531T3 (es) 2023-09-29
EP3597580A1 (de) 2020-01-22
WO2018167343A1 (es) 2018-09-20

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