EP0732282B1 - A method and apparatus for transferring sheet files - Google Patents
A method and apparatus for transferring sheet files Download PDFInfo
- Publication number
- EP0732282B1 EP0732282B1 EP19960850047 EP96850047A EP0732282B1 EP 0732282 B1 EP0732282 B1 EP 0732282B1 EP 19960850047 EP19960850047 EP 19960850047 EP 96850047 A EP96850047 A EP 96850047A EP 0732282 B1 EP0732282 B1 EP 0732282B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- file
- treatment station
- sheets
- rolling
- edge
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H3/00—Separating articles from piles
- B65H3/46—Supplementary devices or measures to assist separation or prevent double feed
- B65H3/60—Loosening articles in piles
Definitions
- the present invention relates to a method of and an apparatus for transferring a file of sheets of paper, plastic or like material from the top of a sheet stack to a treatment station, for instance to a vibratory table.
- the sheets may measure 1400 x 1000 m. This means that the file can weigh up to 25-30 kg, depending on the size of the sheets and on the thickness of the file. Three to four files form a cutting file, the weight of which may be of the order of 70-75 kg. In order to cut the sheets correctly and to loosen any sheets that may have fused together, it is necessary to blow air between the sheets before placing the sheets on the vibratory table.
- a method of and an apparatus for transferring a file of sheets uppermost in a sheet stack to a treatment station comprising the steps of gripping one edge of the file and swinging the edge upwards-rearwards and rolling the file over a part of the upper surface of the stack and transferring said file to the treatment station have earlier been proposed in EP 0 098 385 A for instance.
- this method is very complicated and consists of no fewer that eleven steps which means that the corresponding apparatus will be very expensive and functional sensitive. It also shows that the problem in question is great.
- the object of the present invention is to solve the aforesaid problem and to provide a method and apparatus for transferring a sheet file from a sheet stack to a treatment station, including loosening of fused sheets and separation thereof by air. This object is achieved with an inventive method and inventive apparatus having the characteristic features set forth in claims 1 and 7.
- Shown in the drawing is a stack of sheets 1 from which a file of sheets is to be loosened and transferred to a treatment station, for instance to a vibratory table.
- a treatment station for instance to a vibratory table.
- at least one clamping device 3 which is mounted on a substantially vertical operating arm 4 for pivotal movement through 180° about a horizontal axle 5.
- the operating arm 4 can be moved reciprocatingly in the horizontal plane with the aid of a servo-device.
- the clamping device 3 is provided with a nozzle for blowing air between the sheets.
- one edge 6 of the file 2 is gripped and swung upwardly-rearwardly through 180° and drawn in the direction of the arrow 7 while rolling the file 2 over a part of the upper surface of the stack 1.
- the operating arm 4 is then returned and the file 2 rolled in the opposite direction, back over the upper surface of the stack.
- air is blown in between the sheets from the sides thereof so as to air-separate all sheets in the file.
- the opposing edge 10 of the file may optionally be clamped firmly during this return movement.
- the folding device intended to hold the sheets firmly at the opposing edge 10 is symbolized by the weight 8 in Fig. 2.
- the operating arm 4 is now moved in the direction of the arrow 9.
- the gripping device is operated with servo-assistance, wherein the operator grips a control lever on the operating arm 4 and moves it in the desired direction.
- the apparatus may be suspended either from a swivel crane, an overhead crane, or may run in tracks.
- the described movement generates shearing between the sheets in the file 2. As the upper outwardly sheared part of the file is held firmly and the rolling movement is partly repeated, the sheets will separate and allow air to flow therebetween.
- the file can either be drawn directly to the treatment station or can be turned by again rolling over the file and then drawn over to the treatment station. Air is suitably blown in beneath the file 2, in order to reduce friction.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sheets, Magazines, And Separation Thereof (AREA)
- Pile Receivers (AREA)
Description
- The present invention relates to a method of and an apparatus for transferring a file of sheets of paper, plastic or like material from the top of a sheet stack to a treatment station, for instance to a vibratory table.
- When cutting paper with the aid of a single-knife guillotine, it is first necessary to separate the sheets with air and then lift the sheets onto the vibratory table in order to shake the sheets into their correct positions before the file can be cut. This is effected fully manually. The sheets may measure 1400 x 1000 m. This means that the file can weigh up to 25-30 kg, depending on the size of the sheets and on the thickness of the file. Three to four files form a cutting file, the weight of which may be of the order of 70-75 kg. In order to cut the sheets correctly and to loosen any sheets that may have fused together, it is necessary to blow air between the sheets before placing the sheets on the vibratory table. A method of and an apparatus for transferring a file of sheets uppermost in a sheet stack to a treatment station, comprising the steps of gripping one edge of the file and swinging the edge upwards-rearwards and rolling the file over a part of the upper surface of the stack and transferring said file to the treatment station have earlier been proposed in EP 0 098 385 A for instance. However, this method is very complicated and consists of no fewer that eleven steps which means that the corresponding apparatus will be very expensive and functional sensitive. It also shows that the problem in question is great.
- The object of the present invention is to solve the aforesaid problem and to provide a method and apparatus for transferring a sheet file from a sheet stack to a treatment station, including loosening of fused sheets and separation thereof by air. This object is achieved with an inventive method and inventive apparatus having the characteristic features set forth in
claims 1 and 7. - Further embodiments of the invention are defined in
dependent claims 2 to 6 and 8. - The invention will now be described in more detail with reference to the accompanying drawing, in which
- Fig. 1 is a perspective view which illustrates schematically one step of the inventive method; and
- Fig. 2 is a perspective view which illustrates schematically another step of the inventive method.
-
- Shown in the drawing is a stack of
sheets 1 from which a file of sheets is to be loosened and transferred to a treatment station, for instance to a vibratory table. To this end, there is provided at least oneclamping device 3 which is mounted on a substantiallyvertical operating arm 4 for pivotal movement through 180° about a horizontal axle 5. Theoperating arm 4 can be moved reciprocatingly in the horizontal plane with the aid of a servo-device. Theclamping device 3 is provided with a nozzle for blowing air between the sheets. - As will be seen from Fig. 1, one
edge 6 of thefile 2 is gripped and swung upwardly-rearwardly through 180° and drawn in the direction of the arrow 7 while rolling thefile 2 over a part of the upper surface of thestack 1. Theoperating arm 4 is then returned and thefile 2 rolled in the opposite direction, back over the upper surface of the stack. As the file of papers is returned, air is blown in between the sheets from the sides thereof so as to air-separate all sheets in the file. Theopposing edge 10 of the file may optionally be clamped firmly during this return movement. The folding device intended to hold the sheets firmly at theopposing edge 10 is symbolized by the weight 8 in Fig. 2. Theoperating arm 4 is now moved in the direction of the arrow 9. - As before mentioned, the gripping device is operated with servo-assistance, wherein the operator grips a control lever on the
operating arm 4 and moves it in the desired direction. The apparatus may be suspended either from a swivel crane, an overhead crane, or may run in tracks. - The described movement generates shearing between the sheets in the
file 2. As the upper outwardly sheared part of the file is held firmly and the rolling movement is partly repeated, the sheets will separate and allow air to flow therebetween. - Upon completion of the return rolling movement according to arrow 9, the file can either be drawn directly to the treatment station or can be turned by again rolling over the file and then drawn over to the treatment station. Air is suitably blown in beneath the
file 2, in order to reduce friction.
Claims (8)
- A method of transferring a file (2) of sheets of paper, plastic or the like uppermost in a sheet stack (1) to a treatment station, for instance to a vibratory table, comprising the steps of gripping one edge (6) of the file (2) and swinging the edge upwards-rearwards through 180° and rolling the file (2) over a part of the upper surface of the stack (1), and then rolling back the file (2) and transferring said file to the treatment station.
- A method according to Claim 1, characterized by supplying air from the sides of the file during the return rolling movement.
- A method according to Claim 1 or Claim 2, characterized by firmly holding the opposite edge (10) of the file (2) during said return rolling movement.
- A method according to any one of Claims 1 - 3, characterized by passing the file (2) directly to the treatment station after rolling back the file.
- A method according to any one of Claims 1 - 3, characterized by turning the file (2) by re-rolling the same prior to passing the file to the treatment station.
- A method according to Claim 4 or Claim 5, characterized by blowing air in beneath the file (2) as it is transferred to the treatment station.
- Apparatus for applying the method according to any one of Claims 1 - 6, in which at least one clamping device (3) is mounted on a generally vertical operating arm (4) for pivotal movement through 180° about a horizontal axle (5) and functions to grip one edge (6) of a file (2), wherein said operating arm (4) is servo-assisted for movement in a horizontal plane.
- Apparatus according to Claim 7, characterized in that the clamping device (3) includes air nozzles through which air is blown in between the sheets.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE9500884A SE504109C2 (en) | 1995-03-13 | 1995-03-13 | Methods and apparatus for transferring sheets |
SE9500884 | 1995-03-13 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0732282A2 EP0732282A2 (en) | 1996-09-18 |
EP0732282A3 EP0732282A3 (en) | 1997-09-03 |
EP0732282B1 true EP0732282B1 (en) | 1999-08-04 |
Family
ID=20397523
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19960850047 Expired - Lifetime EP0732282B1 (en) | 1995-03-13 | 1996-03-11 | A method and apparatus for transferring sheet files |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0732282B1 (en) |
DE (1) | DE69603527T2 (en) |
SE (1) | SE504109C2 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2643252B1 (en) * | 2010-11-22 | 2020-07-08 | GR Automation Holding ApS | Automatic handling and aeration of a stack of paper sheets |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3220917C2 (en) * | 1982-06-03 | 1984-10-18 | Gerhard Zöll Maschinenbau, 6238 Hofheim | Method for dividing partial stacks from an overall stack and for depositing each partial stack in a flaky position |
DE3933626C1 (en) * | 1989-10-07 | 1991-03-14 | Wolfgang 6238 Hofheim De Mohr | |
DE69106064T2 (en) * | 1990-06-01 | 1995-05-11 | De La Rue Syst | Method for determining sheets in a stack. |
-
1995
- 1995-03-13 SE SE9500884A patent/SE504109C2/en not_active IP Right Cessation
-
1996
- 1996-03-11 EP EP19960850047 patent/EP0732282B1/en not_active Expired - Lifetime
- 1996-03-11 DE DE1996603527 patent/DE69603527T2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
SE9500884L (en) | 1996-09-14 |
EP0732282A2 (en) | 1996-09-18 |
EP0732282A3 (en) | 1997-09-03 |
SE9500884D0 (en) | 1995-03-13 |
DE69603527D1 (en) | 1999-09-09 |
DE69603527T2 (en) | 2000-03-16 |
SE504109C2 (en) | 1996-11-11 |
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