WO2006024295A1 - Dispositif de maintien du vide - Google Patents

Dispositif de maintien du vide Download PDF

Info

Publication number
WO2006024295A1
WO2006024295A1 PCT/DK2005/000483 DK2005000483W WO2006024295A1 WO 2006024295 A1 WO2006024295 A1 WO 2006024295A1 DK 2005000483 W DK2005000483 W DK 2005000483W WO 2006024295 A1 WO2006024295 A1 WO 2006024295A1
Authority
WO
WIPO (PCT)
Prior art keywords
vacuum
holding device
valve
vacuum holding
shell
Prior art date
Application number
PCT/DK2005/000483
Other languages
English (en)
Inventor
Richard Nissen
Original Assignee
Richard Nissen
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 Richard Nissen filed Critical Richard Nissen
Publication of WO2006024295A1 publication Critical patent/WO2006024295A1/fr

Links

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
    • 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
    • B65H5/226—Feeding articles separated from piles; Feeding articles to machines by air-blast or suction device by suction devices by suction 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
    • B65H3/00—Separating articles from piles
    • B65H3/08—Separating articles from piles using pneumatic force
    • B65H3/10—Suction rollers

Definitions

  • the invention relates to a vacuum holding device for the lifting and/or transport of sheet-shaped objects, such as sheets of cardboard, plywood sheets and the like, said device comprising a roller or a cylinder whose outer side, shell, is perforated for the passage of air, which is sucked from the interior of the roller to generate a vacuum for holding the object by en ⁇ gagement and contact with it.
  • DE 2754370 A1 discloses such a device in the form of a cylinder with openings distributed evenly everywhere in the shell. To ensure that there is only passage through the openings which are present at the object, valve bodies are mounted in all the openings. This is a very vulnerable and un- certain way of limiting the vacuum loss, since the many valve bodies easily become leaky, which reduces the vacuum and thereby the holding force.
  • the object of the invention is to improve vacuum holding devices such that a great lifting force is achieved at the lowest possible vacuum consumption, and this is achieved according to the invention in that the suction through the shell is restricted to the area which forms the contact face between the roller, the cylinder and the object.
  • the vacuum is utilized optimally in this simple manner, and a safe and stable holding force is ensured with the lowest possible consumption of en ⁇ ergy.
  • a suction channel a vacuum channel
  • a vacuum channel is pro ⁇ vided, which terminates at the contact point, and when this is provided with a valve, a single valve will be able to control the vacuum flow through the shell. This ensures that vacuum is consumed only when there is contact with a surface of an object to generate the holding effect.
  • valve When, as stated in claim 3, the valve is provided with a movable valve body, this will be sucked against the cooperating valve seat and shut off the atmospheric air.
  • valve When, as stated in claim 4, the valve is provided with a minor leak, there will be a restricted air passage through the valve when closed to ensure that vacuum is created instantaneously at contact with a surface of an ob ⁇ ject.
  • valve body When, as stated in claim 5, the valve body is controlled by means of a closed resilient container, a passage will be opened or closed depending on the surrounding air pressure of the container by affecting the valve body.
  • the shell is provided with a resilient porous coating, a good contact with the object will be achieved, even if this might have an irregular surface.
  • fig. 1 shows an example of the lifting of objects from a stack
  • fig. 2 shows the stack and a vacuum cylinder, seen from the end
  • fig. 3 shows a sectional view of a vacuum cylinder with two examples of valves in the vacuum channel
  • fig. 4 shows an example of the surface with ribs and air gaps
  • fig. 4A shows the profile shape of a rib
  • fig. 5 shows a sectional view of a cylinder with two further examples of valves.
  • Fig. 1 schematically shows a stack of sheet-shaped objects 1 which are stacked on a pallet placed on a lifting device such that the stack may be raised to engage a plurality of vacuum cylinders 3 disposed above the stack, as shown.
  • These cylinders 3 are connected with a vacuum source such that the up- permost sheet will be sucked firmly to the cylinders 3 by engagement with these.
  • all the cylinders above the stack may be moved away optionally to a deposit position (not shown) via a support of a number of brush cylinders 4.
  • Such a transport of a sheet may take place by depositing on a roller con ⁇ veyor with rotatable cylinders 4.
  • Fig. 2 shows the stack with the sheet stack 1 and a vacuum cylinder 3 seen from the side.
  • the cylinder 3 is mounted in pins 4 in the sides of a hy- draulic or pneumatic pad or hose 5, such that there is a certain vertical movability for the individual cylinders 3, allowing their position to be adapted to the object.
  • Fig. 3 shows a sectional view of a cylinder 3.
  • the interior of the cylinder accommodates a tubular diaphragm 14 which controls the inlet of air through the exterior of the cylinder.
  • An opening 15 is shown, in which passage may be regulated by turning the diaphragm 14, just as the pipe is provided with cooperating partitions to form sections which may operate individually.
  • the vacuum cylinder may hereby be adapted to the width of the objects.
  • a channel 10 leads from the suction channel through the pipe 14 to a valve comprising a seat 12 with small passages 13 as a safeguard against lock ⁇ ing of the valve body 11 to the seat, so that this may be moved from the seat 12 more easily.
  • the channel 10 terminates at the openings 6A in the shell 14 which is dis ⁇ posed at the engagement area for the object 1 when the parts are in con- tact with each other.
  • Fig. 3 shows an embodiment at the bottom where the valve body 11 has the shape of a ball so that this may engage the seat 12 with passages 13.
  • valve bodies are conceivable, the purpose of the valve being that the body is activated, moved, at an increased air flow when the contact with the surface of the underlying object is not existing. This saves unnecessary consumption of vacuum.
  • valve body 11 is sucked to engage the seat 12 when no object 1 is present at the openings 6A, and the valve body is therefore sucked for blocking such that the air passage through the channel 10 is interrupted partially.
  • Fig. 3 at the top, shows a flat valve body 11 , while it has a spherical shape at the bottom.
  • Fig. 5 shows an alternative embodiment of the valve structure.
  • the moving device is formed by closed flexible chambers 16 which control the valve body 11 in response to the surrounding air pressure.
  • the valve body is formed by a tilting body 17 which opens and closes a passage 15 to the vacuum source.
  • small passages 13 are pro ⁇ vided in the valve seat 12, and, in the tiltable valve body 17 shown in fig. 5, a channel 18 through the body, all of said passages ensuring that the valve body is not locked firmly to the seat, but may be moved when contact with an object is created, and the vacuum passage is to be established.
  • the cylinder shell 14 is provided with openings 6A in the entire extent of the shell, said openings providing passage for the vac ⁇ uum.
  • the surface is coated with a layer of cellular rubber 15, whose structure is such that the air may pass from the outside and through the layer via air paths 6 and further through the shell 14 to the vac ⁇ uum channel 10.
  • a rib pattern as indi ⁇ cated in fig. 4, may additionally be provided, said pattern being configured as an outermost layer 7.
  • This rib pattern may be adapted to the extent of the objects, and where there is a division into sections, connecting transi- tions may not be present in the pattern.
  • Other patterns are conceivable, such as a herringbone pattern or similar, obliquely extending patterns.
  • Openings 8 for the inlet of air are present between the ribs 9, whose profile is indicated in fig. 4A.
  • This rib pattern ensures that non-plane surfaces of the object can adhere to the cylinder, as the ribs will be able to conform to the surface of the object 1 by their flexible configuration.
  • the device according to the invention hereby ensures that unnecessary consumption of vacuum does not take place, and the operational reliability is great because the device is simple and sturdy.

Landscapes

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

Abstract

L'invention concerne un dispositif de maintien du vide comprenant un cylindre (3) pourvu d'une enveloppe externe (7, 9, 14, 15) avec des canaux d'air (6) qui servent à réguler le vide au moyen d'un clapet (11, 12, 13), de telle manière que le passage et une force de maintien sont établis, uniquement, lorsqu'un objet (1) est en contact avec le cylindre (3). Ceci permet de diminuer la consommation de vide.
PCT/DK2005/000483 2004-08-28 2005-07-08 Dispositif de maintien du vide WO2006024295A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DKPA200401300 2004-08-28
DKPA200401300 2004-08-28

Publications (1)

Publication Number Publication Date
WO2006024295A1 true WO2006024295A1 (fr) 2006-03-09

Family

ID=35999719

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DK2005/000483 WO2006024295A1 (fr) 2004-08-28 2005-07-08 Dispositif de maintien du vide

Country Status (1)

Country Link
WO (1) WO2006024295A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2602217A3 (fr) * 2011-12-08 2014-07-30 Heidelberger Druckmaschinen AG Alimenteur de feuilles avec deux roues d'aspiration

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4145040A (en) * 1975-10-10 1979-03-20 Gretag Aktiengesellschaft Gripper drum
US5355156A (en) * 1989-08-17 1994-10-11 Linotype-Hell Ag Device for automatically clamping and releasing recording material and operation of said device
US6270074B1 (en) * 1999-04-14 2001-08-07 Hewlett-Packard Company Print media vacuum holddown
US20020191065A1 (en) * 1997-09-04 2002-12-19 Stephen Temple Vacuum drums for printing, and duplex printers
EP1449799A1 (fr) * 2003-02-18 2004-08-25 M T C - Macchine Trasformazione Carta S.r.l. Rouleau pour convoyer une bande ou une feuille de papier dans une machine de conversion de papier et méthode obtenue de convoyage

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4145040A (en) * 1975-10-10 1979-03-20 Gretag Aktiengesellschaft Gripper drum
US5355156A (en) * 1989-08-17 1994-10-11 Linotype-Hell Ag Device for automatically clamping and releasing recording material and operation of said device
US20020191065A1 (en) * 1997-09-04 2002-12-19 Stephen Temple Vacuum drums for printing, and duplex printers
US6270074B1 (en) * 1999-04-14 2001-08-07 Hewlett-Packard Company Print media vacuum holddown
EP1449799A1 (fr) * 2003-02-18 2004-08-25 M T C - Macchine Trasformazione Carta S.r.l. Rouleau pour convoyer une bande ou une feuille de papier dans une machine de conversion de papier et méthode obtenue de convoyage

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2602217A3 (fr) * 2011-12-08 2014-07-30 Heidelberger Druckmaschinen AG Alimenteur de feuilles avec deux roues d'aspiration

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