EP0397016A2 - Dispositif et procédé pour l'enlèvement d'une feuille séparée d'une cassette - Google Patents

Dispositif et procédé pour l'enlèvement d'une feuille séparée d'une cassette Download PDF

Info

Publication number
EP0397016A2
EP0397016A2 EP90108290A EP90108290A EP0397016A2 EP 0397016 A2 EP0397016 A2 EP 0397016A2 EP 90108290 A EP90108290 A EP 90108290A EP 90108290 A EP90108290 A EP 90108290A EP 0397016 A2 EP0397016 A2 EP 0397016A2
Authority
EP
European Patent Office
Prior art keywords
sheet
stack
suction
magazine
foremost
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.)
Granted
Application number
EP90108290A
Other languages
German (de)
English (en)
Other versions
EP0397016B1 (fr
EP0397016A3 (fr
Inventor
Werner Müller
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.)
August Krempel Soehne GmbH and Co KG
Original Assignee
August Krempel Soehne GmbH and Co KG
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 August Krempel Soehne GmbH and Co KG filed Critical August Krempel Soehne GmbH and Co KG
Publication of EP0397016A2 publication Critical patent/EP0397016A2/fr
Publication of EP0397016A3 publication Critical patent/EP0397016A3/fr
Application granted granted Critical
Publication of EP0397016B1 publication Critical patent/EP0397016B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B65H3/00—Separating articles from piles
    • B65H3/08—Separating articles from piles using pneumatic force
    • B65H3/0808—Suction grippers
    • B65H3/085—Suction grippers separating from the bottom of pile

Definitions

  • the invention relates to a device for removing individual sheets from a magazine, in which a stack of sheets is received, with a suction device which can be placed on the foremost sheet of the stack, sucks it up and can be moved away from the magazine with the sheet being sucked up.
  • the invention further relates to a method for removing individual sheets from a magazine, in which a stack of sheets is received, in which a suction device is placed on the foremost sheet of the stack, the foremost sheet is sucked in by the suction device and then the suction device together attached sheet is moved away from the magazine.
  • the uppermost sheet is to be gradually removed from a magazine in which a stack of horizontally lying sheets which are stacked on top of one another in the vertical direction is received.
  • Sheet in the sense of the present invention is to be understood in particular to mean packaging blanks made of paper or plastic materials, which can be provided with punched-out areas or windows.
  • sheet is also to be understood as objects, such as paper sheets, flat bags or the like.
  • a problem with peeling individual sheets from a stack is that if a top copy is picked up by a suction device and then to be moved away from the stack in a horizontal or vertical direction, by adhesive forces between the underside of the top sheet and the The upper side of the next underlying sheet adheres to one another so firmly that not only the top sheet, but also one or possibly several other sheets are pulled off.
  • a disadvantage of such a device or of such a procedure is that this can only be used in magazines with copies lying horizontally.
  • the weight of the stack presses on the foremost sheet to be removed, which, like the remaining stack, is prevented from falling out of the magazine by mostly side retainers. Due to the pushing pressure, due to the specimens lying on the front cover sheet, no air wedge can be inserted between the individual sheets by blowing.
  • Such standing magazines have the advantage that they can be refilled continuously from one side and that sheets can be continuously withdrawn from the magazine on the other side. This is not possible in magazines with stacked sheets stacked horizontally, because after the bottom sheet of the stack lying on the bottom of the magazine has been pulled off, the bottom must first be lowered and a new stack must be inserted.
  • a further disadvantage of the horizontal pulling off of sheets which are provided with cutouts, such as windows or the like, is that upturns, in particular in the corner areas of the cutouts, protrude beyond the flat surface of the sheet and get caught with an underlying sheet when the sheet is pulled off horizontally can, for example, in its window-shaped cut-out, so that here too there is a risk that several copies will be removed, which can even be damaged by the hooking.
  • Another disadvantage of the method of blowing in from the side is that this blowing in at such workplaces results in a strong air movement with the swirling of the smallest particles, which is stressful for the worker.
  • Another disadvantage of this method of operation is that an exact and fault-prone control is necessary in order to obtain the appropriate blowing pressure.
  • the provision of a device which generates compressed air is always associated with noise, which likewise affects and annoys the operator of such a device.
  • the object of the present invention is therefore to develop a device or a method of the type mentioned at the outset in such a way that individual sheets can be removed from a magazine of any type in a simple and reliable manner.
  • the object is achieved in a device in that an element which can be placed under pressure on the foremost sheet is provided, that on each side of the element there is provided a suction device which can be moved in the direction of the intermediate element, one of the two Suction devices, the foremost sheet still lying on the stack, bulging upward when moving towards the element, in each case, between the element and the suction device, pointing away from the stack.
  • the object is achieved by a method in which the foremost sheet of the stack, on the one hand pressed in an area under pressure on the stack, on the other hand is gripped on both sides of the pressed area by a suction device and then by the two suction devices in the direction of the pressed area lying therebetween is pressed, the foremost sheet bulging, in each case, directed away from the next sheet of the stack between the area and the suction device, bulging.
  • the contact pressure of the adjacent element is such that the foremost sheet in the pressing area is pressed firmly onto the stack, thus also holding the sheets below or behind them in place.
  • the suction devices move, only the foremost sheet bulges somewhat, this creates a space between the foremost and the next sheet below or behind it, so that air can enter the space underneath the arch.
  • the sheet lies essentially only in that area with its underside on the upper side of the next sheet in which it is pressed by the element onto this next lower sheet.
  • the laterally outer areas of the blade at the outer end of each curvature are also in contact with the, if at all, only in a very small area Top of the next sheet, so that there are no more such adhesive forces between their contacting surfaces that are sufficient that when lifting the suction device together with the pressing element with the curved foremost sheet an underlying flat sheet is pulled off.
  • a sheet which has been punched out can then be arched in such a way that the corresponding punched-out areas or the projecting edges lie in the curved area, so that when the sheet is pulled off in the direction of the sheet plane, hooking can no longer take place. It is of course also possible to remove the arched sheet perpendicularly or at an angle to the sheet plane. This makes it possible to work with both standing and lying paper magazines.
  • the suction device releases the sheet. Due to the meantime corrugated state, the sheet has a slightly curved shape after detaching from the suction device, which has the considerable advantage when working with a standing magazine that such a sheet, if released by the suction device, for example due to gravity with the curved edge meets a ground, has considerable resistance to buckling, so that, in contrast to completely flat sheets, individual sheets can be fed upright to a lower-lying processing station due to the working method according to the invention with a relatively high falling speed.
  • the element takes the form of a rod which can be placed along a central longitudinal line of the stack.
  • This measure has the advantage that the sheet is quasi clamped on the stack in a relatively narrow linear area that can span an entire width of material. It is then possible to create a relatively large curved area on both sides of the rod.
  • the element is curved in the contact area, the side of the sheet facing the element being tangential to the line of curvature of the element.
  • This measure has the advantage that the sheet arching on both sides of the element can gently nestle against the curved contour, so that no traces such as angular press-in impressions remain on the sheet. This is achieved particularly favorably in that the element is semicircular in cross section.
  • the element is fastened to a carrier which can be delivered to the foremost sheet with controllable contact pressure.
  • This measure has the advantage that sheets of different materials can be removed, ie each can be adapted to the type of materials as well as to different thicknesses and different flexibility of the sheets.
  • a compression spring arrangement is provided between the carrier and the element, and the carrier can be advanced to the foremost sheet of the stack.
  • This measure has the advantage that the corresponding contact pressure can be generated by structurally simple, robust and thus indestructible measures.
  • the suction devices can be pivoted about axes arranged at a distance from the foremost sheet and running parallel to the sheet plane.
  • This measure has the advantage that, seen through the pivoting movement relative to the plane of the sheet, a circular movement directed away from the plane of the sheet is generated, which supports the formation of the curvatures between the pressed element and suction devices.
  • the two suction devices are arranged symmetrically to the element lying centrally on the foremost sheet.
  • This measure has the advantage that the compressive forces acting on the sheet each act uniformly during the formation of the curvature, so that evenly shaped curvatures are produced, after which, for example, a uniformly curved sheet is produced in a standing magazine after release, which has precisely predetermined properties in With regard to the buckling resistance.
  • each suction device has a plurality of suction cups, the approximately annular end surface of which comes to lie directly on the rectilinear surface of the sheet and parallel to the latter during suction, and that the end surface after pivoting at an angle and at a distance from the rectilinear one Surface run.
  • This measure has the advantage that, on the one hand, as already mentioned, the formation of the curvature is supported, and it is also possible, by arranging the suction cups correspondingly far to the side, to ensure that the arched specimen is essentially only pressed in the middle Area in connection with the lower copy. This allows an extremely rapid movement of the arched sheet away from the remaining stack, because adhesive forces can only act in the narrow central contact area.
  • This measure also has the advantage that when the surface-mounted suction cups are pivoted in the direction of the element pressed between them, the outer regions of the suction cups are moved somewhat into the sheet stack.
  • the foremost sheet that is to be pulled off is moved away from retaining devices that are intended to prevent the foremost sheet from escaping from the magazine, or at least the contact pressure that presses this sheet against the retaining devices is reduced.
  • the foremost sheet can then be removed from the retainers without risk of damage.
  • this pressure relief of the foremost sheet is desirable, since in the case of a suitably large magazine, considerable pressure is exerted on the foremost sheet to be removed works.
  • Such a movement of the pivoting suction cups, which is directed into the stack can be further increased in that the pivot axis of the suction cups is arranged laterally offset from the longitudinal axis of the suction cups.
  • the suction device is carried by the carrier which also carries the element.
  • This measure has the advantage that a structurally particularly simple device is created which is designed as a compact component, since the essential components, namely the element and the suction device, are held by a single carrier.
  • the carrier can be pivoted in such a way that a gripped sheet is led away from a circular arc line directed perpendicularly away from the stack surface.
  • This measure has the advantage that, in the case of objects with extremely protruding edges due to punching, a sheet can nevertheless be removed from the stack quickly and without the risk of getting caught.
  • the magazine is designed as a standing, inclined magazine, and the carrier can be pivoted in front of the delivery surface which is inclined downward in the direction of gravity, and after the front sheet has been sucked in and arched, the carrier can be pivoted such that the straight longitudinal lines of the curved sheet run vertically, and the sheet in this position using gravity is released from the suction device.
  • a magazine has opposing retainers, each of which covers an edge area of the foremost sheet, the movement of the suction device being such that the edge areas of the sheet covered by the retainers are pulled off the retainers so far tangentially that the edges become clear.
  • This measure has the advantage that, in particular in the case of standing magazines, the sheet is only arched so far that its lateral end edges just leave the retainers. This movement can be carried out very quickly by the tangential sliding along the retainers without the risk of damage.
  • a device 10 according to the invention shown in FIGS. 1 to 4 has a carrier 12 which is arranged pivotably about a pin 14, as is indicated by an arrow 15.
  • the carrier 12 consists of an angle arm 16, one arm 18 is fixedly connected to the pin 14.
  • a second arm 20, which extends at right angles from arm 18, carries two brackets 22, 24, which in turn extend perpendicularly from arm 20, extend parallel to arm 18 and extend in the same direction as this arm 18 away from arm 20 .
  • each holder 22 or 24 is provided with a compression spring 26 or 28, which in turn is connected to an element 30 in the form of a rod 32.
  • the rod 32 which is connected to both holders 22, 24 via the springs 26, 28, runs at a distance and parallel to the arm 20.
  • the rod 32 has a profile which is semicircular in cross section (see in particular FIGS. 3 and 4), whose semicircular line of curvature 34 (see FIG. 3) extends away from the outer end of the spring 26 or 28, that is to say via its rectilinearly extending rearward Side is connected to the springs 26 and 28 respectively.
  • two suction devices 36 and 38 are also accommodated, each of which is identical and one have in the carrier 12 received shaft 40 or 40 '.
  • the shafts 40 and 40 'run parallel to the arm 20, are at the same level and laterally equally spaced from the brackets 22 and 24 (see Fig. 3).
  • a suction device 36 and 38 From each shaft 40 and 40 'of a suction device 36 and 38 extend vertically directed suction cups 44, 46 and 44', 46 'away, at the outer ends of suction cups 48, 50 and 48', 50 'are arranged.
  • the suckers 44 and 46 of the suction device 36 which are connected to the shaft 40 (see FIG. 1), are spaced apart from one another in such a way that they come to lie approximately at the level of the end region of the rod 32.
  • the suction devices 36 and 38 are connected to negative pressure means, not shown here, so that a negative pressure can be generated at the outer ends of the suction cups.
  • the device 10 cooperates with a magazine 60, which is designed as an inclined, standing magazine and whose housing 62 at the outlet end, i.e. in the illustration of FIGS. 1 and 2 at the right end, with retainers 64, 66 (see FIGS. 3 and 4 ) is provided.
  • a magazine 60 which is designed as an inclined, standing magazine and whose housing 62 at the outlet end, i.e. in the illustration of FIGS. 1 and 2 at the right end, with retainers 64, 66 (see FIGS. 3 and 4 ) is provided.
  • a stack 67 of sheets 68, 69 and 70 ' is added, with the foremost sheet 70 in its lateral edge area on the inside of the retainer 64, 66, and is thereby prevented from falling out of the magazine 60.
  • the retainers 64 and 66 are rod-shaped in the exemplary embodiment shown here.
  • Such standing, inclined magazines 60 have the advantage that sheets 72 can be pushed continuously, as is indicated in FIG. 1 by an arrow 74.
  • the operation of the device 10 according to the invention is as follows:
  • the carrier 12 is brought in front of the magazine 60 by pivoting by means of a drive, not shown, about the pin 14, as shown in FIG. 1.
  • the rod 32 then lies exactly along a surface line of the curvature in a region 33 on a central longitudinal line on the outside of the foremost specimen 70. In this pivoting position, the rod 32 is pressed onto the specimen 70 due to the force of the springs 26 and 28.
  • the contact pressure of the rod 32 can be regulated in that the arm 20 can be moved back and forth along the arm 18, as is indicated by a double arrow 51 in FIG. 1. This adjustment can be done by a pressure cylinder, not shown here.
  • the suction devices 36 and 38 are also displaceable in the direction of the double arrow 51 of FIG. 1, this being used for adjustment.
  • the suction devices 36 and 38 are pivoted about their shafts 40, 40 'in such a way that the suction cups, together with the sheet 70 adhering thereto, move onto the rod 32, as shown in FIG. 4 is indicated by arrows 54 and 56.
  • the sheet 70 bulges between the corresponding suction cup and the rod 32 directed away from the top of the stack 67 (see also FIG. 6). 4
  • the left and right outer ends of the sheet 70 are pulled off tangentially from the retainers 64 and 66, which are then exposed in the illustration of FIG. 4, that is to say no longer perpendicular to the pull-off Stacking level can be prevented by the retainers 64 and 66.
  • the pivot axes of the suction cups are laterally offset in the direction of element 32, as a result of which the movement of the suction cups directed into the magazine 60 is more pronounced, so that the foremost copy 70 is completely detached from the retainers 64 and 66.
  • the carrier 12 After swiveling the suction devices 36, 38, which can be done by means known per se, such as swivel levers or rotary cylinders, the carrier 12 is moved counterclockwise from the position shown in FIG. 1 into the position shown in FIG. 2 shown position pivoted.
  • the suction cups i.e.
  • the suction or vacuum state has ended, the sheet 70 pulled from the magazine 60 detaches from the suction cups due to the force of gravity and falls, as shown by an arrow 52 in FIG. 2, downward.
  • the suction devices 36 and 38 are then pivoted again from the pivoted position shown in FIG. 4 into the position shown in FIG. 3 and at the same time the carrier 12 is pivoted back into the position shown in FIG. 2, in order to then take the now front copy 69 and to repeat the process described above.
  • FIG. 5 to 7 show how the shape changes as a result of a machining operation with the device 10 according to the invention of a sheet 70 changed.
  • a specimen 70 accommodated in the magazine 60 assumes the flat shape shown in FIG. 5. After it has been gripped by the suction devices 36, 38 and pivoted, it assumes the wavy shape shown in FIG. 6. Due to the compression of the material by the pivoting suction cups on the rod 32, the specimen 70 ⁇ , after it has detached itself from the suction devices 36, 38, assumes the curved shape shown in FIG. 7.
  • This slightly curved shape has the advantage that a specimen which, as shown in FIG. 2, falls from the device 10 due to the force of gravity is prevented from buckling due to this curved geometry, so that even relatively large falling distances can be carried out with corresponding acceleration .
  • the distances between the suction devices 36 and 38, as well as the distances of the suction devices of a suction device in the longitudinal axis of the corresponding shaft, are adjustable so that a device 10 can be easily adapted to different magazine sizes.
  • suction devices with individual suction cups have been shown. It is of course also possible to design the suction devices as suction strips with perforations, or to arrange several suction devices along a shaft 40 in the case of correspondingly larger magazines.
  • the device 10 has been described in connection with an inclined magazine 60. It is of course also possible to work with a lying magazine, in which horizontally lying copies are recorded. It is then possible for the copy taken to be discharged either in the horizontal, vertical or correspondingly oblique or curved direction. This depends on the respective product, or in particular on whether there are punched-out edges or the like protruding far beyond the surface of the sheet, which necessitate a removal movement which runs more perpendicularly to the sheet plane.
  • packaging blanks with window-like punchings can be moved without any problems, without the risk of snagging.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sheets, Magazines, And Separation Thereof (AREA)
EP90108290A 1989-05-10 1990-05-01 Dispositif et procédé pour l'enlèvement d'une feuille séparée d'une cassette Expired - Lifetime EP0397016B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3915284A DE3915284A1 (de) 1989-05-10 1989-05-10 Einrichtung und verfahren zum entnehmen von einzelnen blaettern aus einem magazin
DE3915284 1989-05-10

Publications (3)

Publication Number Publication Date
EP0397016A2 true EP0397016A2 (fr) 1990-11-14
EP0397016A3 EP0397016A3 (fr) 1991-07-31
EP0397016B1 EP0397016B1 (fr) 1994-08-10

Family

ID=6380406

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90108290A Expired - Lifetime EP0397016B1 (fr) 1989-05-10 1990-05-01 Dispositif et procédé pour l'enlèvement d'une feuille séparée d'une cassette

Country Status (4)

Country Link
EP (1) EP0397016B1 (fr)
JP (1) JPH0323127A (fr)
DD (1) DD297943A5 (fr)
DE (2) DE3915284A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013018196A1 (de) * 2013-10-30 2015-04-30 Murrplastik Systemtechnik Gmbh Vorrichtung zum Greifen und Transportieren eines Kennzeichnungsschildersatzes
CN108840132A (zh) * 2018-07-24 2018-11-20 广西北流盛丰源纸品有限公司 一种纸板翻转装置
CN113479445A (zh) * 2021-05-18 2021-10-08 红塔烟草(集团)有限责任公司 一种硬盒商标纸多通道下纸装置

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2258025C1 (ru) * 2003-12-10 2005-08-10 Московский государственный университет дизайна и технологии (МГУДТ) Устройство для поштучного захвата гибких листовых объектов
JP6993945B2 (ja) * 2018-08-02 2022-01-14 日立チャネルソリューションズ株式会社 紙葉類取扱装置及び紙葉類取扱方法

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3756587A (en) * 1971-12-23 1973-09-04 Usm Corp Fabric pick-up mechanism
BE791606A (fr) * 1972-07-10 1973-03-16 Pilot Pen Co Ltd Procede et appareil pour aspirer et soulever la feuille la plussuperieure d'une pile de feuilles de ce type
US4311304A (en) * 1978-09-29 1982-01-19 Fuji Photo Film Co., Ltd. Presensitized plate handling device
DE3325518A1 (de) * 1983-07-15 1985-01-24 Stb Strahlentechnische Bilddiagnostik Heinz Fleck, 2080 Pinneberg Verfahren zum transportieren und/oder aufeinanderfolgenden zufuehren einzelner filmblaetter o.dgl. von einem stapel und vorrichtung zur durchfuehrung des verfahrens
US4669716A (en) * 1985-07-29 1987-06-02 Bell & Howell Method and device for deflecting a sheet prior to feeding

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013018196A1 (de) * 2013-10-30 2015-04-30 Murrplastik Systemtechnik Gmbh Vorrichtung zum Greifen und Transportieren eines Kennzeichnungsschildersatzes
CN108840132A (zh) * 2018-07-24 2018-11-20 广西北流盛丰源纸品有限公司 一种纸板翻转装置
CN108840132B (zh) * 2018-07-24 2024-06-07 广西北流盛丰源纸品有限公司 一种纸板翻转装置
CN113479445A (zh) * 2021-05-18 2021-10-08 红塔烟草(集团)有限责任公司 一种硬盒商标纸多通道下纸装置
CN113479445B (zh) * 2021-05-18 2024-03-22 红塔烟草(集团)有限责任公司 一种硬盒商标纸多通道下纸装置

Also Published As

Publication number Publication date
DD297943A5 (de) 1992-01-30
DE59006738D1 (de) 1994-09-15
EP0397016B1 (fr) 1994-08-10
DE3915284A1 (de) 1990-11-15
JPH0323127A (ja) 1991-01-31
DE3915284C2 (fr) 1992-05-21
EP0397016A3 (fr) 1991-07-31

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