EP0915041A1 - Méthode et dispositif pour séparer des objets flexibles et plats - Google Patents

Méthode et dispositif pour séparer des objets flexibles et plats Download PDF

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Publication number
EP0915041A1
EP0915041A1 EP98120960A EP98120960A EP0915041A1 EP 0915041 A1 EP0915041 A1 EP 0915041A1 EP 98120960 A EP98120960 A EP 98120960A EP 98120960 A EP98120960 A EP 98120960A EP 0915041 A1 EP0915041 A1 EP 0915041A1
Authority
EP
European Patent Office
Prior art keywords
suction
adhesive
transport
transport direction
effect
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.)
Withdrawn
Application number
EP98120960A
Other languages
German (de)
English (en)
Inventor
Hans Ehrlich
Hans-Ernst Gauger
Rainer Buschulte
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.)
LTG Holding GmbH
Original Assignee
LTG Holding GmbH
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
Priority claimed from DE1997149498 external-priority patent/DE19749498C2/de
Priority claimed from DE19832847A external-priority patent/DE19832847C2/de
Application filed by LTG Holding GmbH filed Critical LTG Holding GmbH
Publication of EP0915041A1 publication Critical patent/EP0915041A1/fr
Withdrawn legal-status Critical Current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
    • B65H3/0816—Suction grippers separating from the top of pile
    • B65H3/0825—Suction grippers separating from the top of pile and acting on the rear part of the articles relatively to the final separating direction
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H3/00—Separating articles from piles
    • B65H3/08—Separating articles from piles using pneumatic force
    • B65H3/0808—Suction grippers
    • B65H3/0883—Construction of suction grippers or their holding devices

Definitions

  • the invention relates to a method for separating flexible, flat objects, especially of Sheets of paper, cardboard sheets, metal sheets or the like, taking the items from a stack lifted off at the top and thereby isolated and subsequently horizontally or approximately horizontally Transport direction can be removed.
  • the invention is therefore based on the object Process for separating flexible, flat objects specify with which even with large quantities Trouble-free operation per unit of time is guaranteed.
  • this object is achieved by that for lifting a progressing in the transport direction, adhesive effect attracting the object is built up.
  • the invention is therefore based Process on it not the flat object full-surface lifting, but progressively in areas, namely in such a way that the one acting on it Adhesion effect that causes lifting in Direction of transport progresses and accordingly first the rear edge of the flat object raised and in the course of the further lifting process due to the progressively increasing adhesive effect the adjoining areas of the object be raised until the front edge is reached is.
  • the item is subject to during the Lifting process due to the progressive adhesive effect a reversible approximately S-shaped Deflection, that is, it becomes - in cross section viewed - almost in the form of one from the rear edge to the leading edge of the "shaft" in the lifting position transferred. If this position is reached, then the removal takes place in a horizontal or approximately horizontal direction of transport. If the object is removed, then the next item raised from the stack. This However, lifting can also take place in the overlapping position to the previous item, that is, as soon as the previously raised object is a section is removed, but still a part There is overlap to the stack in the area the trailing edge of the next board raised. The Raising thus takes place in an area that is characterized by the removal of the previously lifted board already has been released. The progressive increase the next board is coordinated with the removal the previously raised board.
  • the adhesive effect is achieved as a vacuum effect becomes.
  • the vacuum flexible, flat objects made of any material be raised.
  • the adhesive effect by magnetic To achieve holding effect.
  • the vacuum effect is essentially dealt with. Instead of the negative pressure effect but also one for ferromagnetic objects magnetic holding action so that the entire Accordingly, disclosure of this application applies to magnetic devices if specific Vacuum devices are described.
  • the invention further relates to a device for Separating flexible, flat objects, in particular of paper sheets, cardboard sheets, metal sheets or the like, with one of the objects of one Stack of lifting device and one the objects after taking off in horizontal or roughly horizontal transport direction transporting transport device, the object attracting to the adhesive device Adhesive effect progressing in the direction of transport is built up. First, accordingly by one in the area of the rear edge of the object trained adhesive effect the rear edge of the object from the stack and then be the other areas of the item - namely progressing in the direction of transport - due to the Adhesive effect progressing in the direction of transport the detention facility raised.
  • the detention facility several, next to each other in the direction of transport, can be activated or deactivated in succession Has suction elements.
  • the activation of a Suction elements causes the associated area the sheet is raised in the lifting position becomes. Is the suction strong enough and / or that Suction element at a sufficiently short distance to the metal sheet, the lifting takes place on the basis of the Suction.
  • a lifting device can, for example be a pneumatic device that means a piston is pneumatically moved up and down, a suction device at its free end wearing.
  • the detention device at least a suction means extending in the transport direction has by moving a slide Can be activated progressively in the direction of transport or in the opposite direction can be deactivated.
  • a slide Can be activated progressively in the direction of transport or in the opposite direction can be deactivated.
  • suction openings are opened or it is possible that a Suction chamber of the adhesive device enlarged or is reduced.
  • an essentially downwardly open suction chamber has a side wall formed by the slide, which when lifting the item in Transport direction is shifted so that the Suction chamber expands in the direction of transport and due to of which with increasing expansion the progressive suction of the object takes place.
  • the adhesive device continuously or in segments in the direction of transport towards the object to lift it is relocatable. Therefore, first takes place in Lower the area of the rear edge of the object the adhesive device so that there the adhesive effect enters and the corresponding area of the item is raised. Continuously or in segments then the adjacent areas of the Detention device shifted towards the object, so that these areas of the object be detected and raised.
  • the adhesive device at least one extending in the direction of transport Has a suction means with a suction chamber through at least one partition can be divided into subchambers is and that the partitions or areas of them relocatable to connect / separate adjacent subchambers are.
  • the suction chamber is due the partitions divided into sub-chambers, the the partial chamber assigned to the rear edge of the metal sheet is subjected to negative pressure, whereby the Lifting the flexible, flat object in in this zone.
  • the adhesive device several lying side by side in the direction of transport Has suction chambers / suction openings, which by means of a Vacuum control device can be activated / deactivated one after the other are.
  • the activation respectively Deactivation can be done, for example, by means of a valve control take place between a vacuum source and the suction chambers respectively Suction openings.
  • the adhesive device at least two adjacent to each other in the direction of transport Suction belt stretches that simultaneously form the transport device, wherein the suction belt sections with regard to their negative pressure and one after the other in terms of their drive or can be activated / deactivated at the same time.
  • This way it is possible to go through one after the other activation of the negative pressure Adhesive effect and the object progressively then lift the item by simultaneous activation of all drives of the suction belt sections to be transported horizontally. Leaves the rear edge of a sheet of metal a suction belt section, so this can be done again be deactivated, the deactivation with regard to the drive, so that -zur Creation of a sheet metal shingling - the following Sheet raised in the area of its rear edge can be.
  • the individual suction belt sections show thus lengths that are shorter than that Longitudinal format (format seen in the direction of transport) of the metal sheets.
  • Suction elements are controlled can be activated / deactivated. These suction elements too can then use for the progressive lifting of the metal sheets are used.
  • the adhesive device as a blowing air device is formed, the blowing air in essentially along the surface of the to be lifted Object is blown.
  • this blowing roughly parallel to the surface of the metal sheet creates a suction effect on the metal sheet raises a higher level, as well progressively takes place, i.e. from the rear edge starting to the front edge.
  • the adhesive device is designed as a vacuum device
  • the one Blown air device is assigned such that the Blowing air at least partially the vacuum effect picks up.
  • the vacuum device in a certain area supplied with blown air, so the negative pressure has no effect there, it there is therefore no lifting of a metal sheet in this area.
  • Is now controlled by the Blown air, showing the strength and / or direction and / or the impact of the blowing air can be influenced is, in itself, over the entire length of the metal sheet targeted influence of constant negative pressure, such that they are in the direction of transport progressively builds up, so takes place accordingly progressive lifting of the object.
  • FIG. 1 shows a device 1 for separating flexible, flat objects 2, which are used as metal sheets 3 can be formed.
  • the metal sheets 3 are arranged as a stack 4 one above the other, such that their levels are horizontal.
  • a pallet 5 for example by means of a roller conveyor 6 in the suitable aligned position to device 1 can be moved.
  • the device 1 has an adhesive device 7, a transport device 8 and a lifting device 9 on.
  • the metal sheets 3 each have one Trailing edge 10 and a leading edge 11 each, the front edge 11 in the transport direction (Arrow 12) points.
  • the topmost sheet of metal 3 of the stack 4 points to the adhesive device 7 and Transport device 8 a vertical distance on. This distance becomes when the stack 4 is processed roughly adhered to, this means that by Dismantling the height of the stack 4 a not shown Lifting device must take action the remaining stack so far that the distance to Adhesion device 7 or transport device 8 received within a certain range remains.
  • the lifting device 9 is a lifting suction device 13 formed, which has a piston rod 14, the pneumatic by means of a not shown Control device can be raised and lowered and which has a controllable suction head at its free end 15 has.
  • the following are regarding the adhesive device 7, the transport device 8 and the lifting device 9 each have the explanations given according to the illustrated embodiments, being on the width of the format of the sheet respectively Sheet 3 no consideration becomes. Assign these sheets or sheets 3, however, has a not inconsiderable width -what is to be assumed- it is possible that about the width distributes several elements of the adhesive device 7, the transport device 8 and also the Lifting device 9 are arranged to cover the entire Sheet width and a trouble-free lifting and to ensure removal of the metal sheets 3.
  • the stack 4 is below of the device 1.
  • the piston rod 14 Around the topmost sheet of metal 3 raise and in the raised position to hold, the piston rod 14 first lowers of the suction cup 13 in the area of the rear edge 10 the top of the sheet 3 above off, the controllable suction head 15 being activated, that is, it has a suction effect. Subsequently pulls - according to Figure 2- the piston rod 14 back, whereby the sheet 3 in the area their rear edge 10 is raised, such that their top against the bottom of the adhesive device 7 occurs.
  • the transport device 8 comes into operation, which - according to the embodiment of the figures 1 to 5- as drive-controlled and vacuum-controlled Suction belt device 16 formed which has a plurality of rollers 17, over which at least an endless suction belt 18 runs, whereby at least within the loop of the suction belt 18 a vacuum box 19 is located.
  • the transport device 8 activated so that that of the transport device 8 of the adhesive device 7 adopted sheet 3 in the direction of transport 12 transported away, for example one Processing station is fed.
  • the transport device 8 is the transport device 8 as relatively short unit shown. In practice it can have a much longer length or several transport devices 8 in Series are connected in series.
  • the raised sheet 3 is removed, as shown in Figure 5 is. It can be seen that the rear edge 10 of the raised sheet 3 already so far from the trailing edges 10 of the metal sheets 3 of the stack 4 has moved away that the vacuum cleaner 13 again can take action to the next sheet 3 to lift from stack 4.
  • the adhesive device 7 occurs then with appropriately controlled progressive Adhesive effect in action so that a takeover the corresponding area of the following sheet 3 collision-free to the rear edge 10 of the previous raised, moving away metal sheet 3 takes place.
  • the lifting and transport steps are therefore carried out in an overlapping position of the metal sheets 3, so that a very high number of pieces per Unit of time can be driven.
  • FIG. 6 shows an embodiment of a Adhesion device 7 (the transport device 8 of the Device 1 is not shown for the sake of simplicity).
  • the adhesive device 7 has several, in Direction of transport (arrow 12) Suction elements that can be activated / deactivated in succession 20 on that via a vacuum control device 21 connected to a vacuum source 22 are.
  • 6 is in the upper area Construction shown schematically. It is recognizable that the vacuum control device 21st has a plurality of valves 23 which between the vacuum source 22 and the respective Suction element 20 lie.
  • the suction elements 20 are as downwardly open chambers 24 formed over Pipe socket 25 and on the pipe socket 25th connected valves 23 via a common Suction line 26 with the vacuum source 22 in connection stand.
  • the vacuum control device 21 controls the valves 23 one after the other such that for lifting those lying on top of the stack 4 Sheet 3 first in the area of its rear edge 10 and then progressing segment by segment by activating the adjacent chamber 24 is raised.
  • no lifting device 9 is shown. This applies generally for all exemplary embodiments of the invention, which either have a lifting device 9 can or have no lifting device 9. If no lifting device 9 is provided, then the adhesive effect of the adhesive device 7 is sufficient, by the distance to the topmost table 3 overcome so that by activating the adhesive device the lifting of the panel 3 takes place automatically.
  • FIG. 7 illustrates a further exemplary embodiment an adhesive device 7, the -Like all other detention facilities 7 the different embodiments- preferably is designed as one or more suction bars.
  • a Direction of transport (arrow 12) extending suction chamber 27 is provided, which is open at the bottom, that is, there is only an air grille there 28.
  • the adhesive device 7 3 (not shown in Figure 7) opens one Suction line 29 into the suction chamber 27.
  • the air line 29 is connected to a vacuum source 22.
  • a slider 30 slidably stored.
  • the slide 30 has a piston rod 31 and a piston wall 32, which is a displaceable Suction chamber wall 33 forms. Is by means of Piston rod 31 the suction chamber wall 33 in the direction of the arrow 34, this increases active volume of the suction chamber 27 with the result that the adhesive effect (suction effect) in the direction of transport 12 is built up progressively. This has to Consequence that a sheet 3 raised in synchronism with the movement of the slider 30 and is held on the adhesive device 7. Subsequently the sheet is then removed 3 by means of the transport device, not shown 8th.
  • FIG 8 shows an embodiment of a Adhesion device 7, the one above the stack 4 has stationary level 40, from the air cushion 41st go out to which a suction beam 43 is attached.
  • the suction bar 43 therefore hangs over the air cushions 41 at level 40 above the stack 4.
  • the Suction bar 43 is connected to a vacuum source, not shown connected and along its length, So in the direction of transport 12, flexible, so that it towards the stack 4 in the sense of a "continuous shaft" can be deformed.
  • the suction bar 43 is open at the bottom, so that a sheet 3 can be sucked in. Because of the multitude of over the length of the metal sheet 3 arranged air cushions 41, preferably can be designed as concertina tubes, can the suction bar 43 in the direction move the top of the stack 4. this happens by appropriate control of the air cushions 41, so that they individually adjust their length.
  • a corresponding pneumatic, not shown Control device takes control of the various Air cushion and drives like that before first lowering the suction bar 43 in the area of the rear edge 10 of the metal sheets 3, whereby the topmost metal sheet 3 is sucked in and raised.
  • the embodiment of Figure 9 corresponds to that Embodiment of Figure 8, but none continuous control of the air cushions 41 takes place, but a segmental approach in the direction of transport 12, that is, take the air bags 41 essentially only two states, namely on the one hand the normal state (short length) and the activated state (long length) so that the lowering the suction bar 43 not in the sense of a continuous, moving in the direction of transport Deflection is made, but discontinuously. Otherwise it works of the embodiment of Figure 9, however, also as in the embodiment of Figure 8. However there is the difference that in Figure 9 the Suction bar 43 does not touch the stack 4, like this is the case in FIG. 8.
  • the embodiment of Figure 10 illustrates the function of the embodiment of Figure 9 regarding an overlapping position of a Sheet 3 and a subsequent sheet 3. It is recognizable that a metal sheet 3 has already been raised and by means of the transport device 8 in the transport direction 12 is transported away. The rear edge 10 of these are being removed Sheet 3 lies approximately on the middle of the length format of stack 4.
  • FIG 11 shows an embodiment of a Adhesion device 7, which is in the transport direction 12 extending suction means 51, the is designed as a suction chamber 52.
  • the suction chamber 52 is downwards, i.e. towards the Stack 4, open and is over several air intake 53 and suction lines 54 with one not vacuum source shown in connection.
  • Within the suction chamber 53 are transverse to the direction of transport 12- partitions 55 arranged so that the suction chamber 52 into a plurality of subchambers 56 is divided.
  • the partitions 55 can in their upper area by means of pivot axes 57 in Direction of arrows 58 are pivoted, whereby the volume of the suction chamber 52 accordingly can be adjusted.
  • Three partitions are an example 55 shown in dashed lines, causing the folded Position is clarified.
  • the not shown Low pressure source is by means of an intake port 53 connected to the right-hand partial chamber 56, so that when the vacuum is activated Adhesive effect in the area of the rear edge 10 becomes. Now the individual partitions 55 one after the other - seen in the direction of transport 12 - folded or pivoted, the negative pressure effect migrates in the direction of the transport direction 12, so that the adhesive effect in this way progressively built up in transport effect 12 becomes.
  • Embodiments are often several Intake 53 over the length of the adhesive device 7 distributed, which makes it possible after opening the chamber partition, i.e.
  • FIGS 12 and 13 show an embodiment an adhesive device 7, which under construction Vacuum box 19 of Figure 6 corresponds to that that is, there are a plurality of suction elements 20 provided a variety of open to the bottom Form chambers 24.
  • the chambers 24 are over Pipelines 60 with a vacuum control device 21 connected in cross section in the figure 13 is shown.
  • the vacuum control device 21 has a housing block 61 in which a Control cylinder 62 is rotatably mounted. The direction of rotation is indicated by an arrow 63. The drive or the rotation of the control cylinder takes place by means of a drive device, not shown.
  • a vacuum source 22 is axially connected to the vacuum control device 21, so that inside the control cylinder 62nd there is a negative pressure.
  • the control cylinder 62 has control openings 64 which, depending on the rotational position, have outlets 65 of the housing block 61 can correspond. That way becomes - depending on the rotational position of the control cylinder 62- Connection between the respective chamber 24 and the vacuum source 22 created, this in such a way that - starting from the rear edge 10- an adhesive effect in the direction of transport builds up, as already described with the previously Embodiment was set out in more detail.
  • the Control cylinder 62 may also have vents 66 having that with the outside atmosphere or even be connected to a compressed air generator, to vent the chambers 62 or even with compressed air to apply to the ventilation process accelerate. The exact compressed air flow is For the sake of simplicity - not in FIGS. 12 and 13 reproduced.
  • the embodiment of the vacuum control device 21 essentially corresponds to FIG. 14 the embodiment of Figure 13, however through axial walls 70 of the control cylinder 62 in the axial direction divided into at least two areas 80.81, one of the areas of negative pressure and the leads to other compressed air.
  • the two areas 80 and 81 control openings 64 and 82 are assigned, so that per activation of a chamber with one rotation the control cylinder 62 is subjected to a vacuum and - accordingly delayed - an application done with compressed air. It is also possible, one application several times per revolution with negative and / or positive pressure.
  • the control openings 64 and 82 in their size, preferably in their circumferential direction length, are changeable to make a suitable adjustment of the adhesive effect to be able to.
  • Figure 15 shows an embodiment in which a multiplicity on the housing block 61 in the circumferential direction of outlets 65 are provided.
  • the control cylinder 62 is in the form of sealing segments 85 which stand at an angle to each other and the outlets 65 -depend on rotary position- or release. Be between the sealing segments 85 different areas 80 and 81 are formed, which is supplied with suction air and / or compressed air are. Another way results from this way Control sequence of the chambers 24 compared to the Embodiment of Figure 14
  • the embodiment of Figure 16 embodies a summary of a detention facility 7 with a transport device 8.
  • the adhesive device 7 is designed as an adhesive bar and lies within of an endless strand 88.
  • the strand is permeable to air trained so that through the strand 88 through Adhesion (suction) of the adhesive device 7 the sheet 3 can act. Is the metal sheet 3 raised by means of the adhesive device 7, so sets the Endlostrum 88 by means of a controllable Drive in motion and transports the sheet 3 in the transport direction 12 to a further processing location.
  • the adhesive device 7 is corresponding one of the embodiments formed in In the course of this registration are described.
  • FIG. 17 shows several cascaded combined embodiments according to the embodiment of Figure 16, with between each neighboring, provided with adhesive device 7 Endlostrums 88, suction bar 90 arranged are for a smooth running of the metal sheets 3 in the transition areas 92 between the Systems.
  • the pulleys are the Endlostrums 88 designated.
  • FIG. 18 shows a further exemplary embodiment, which corresponds approximately to that of Figure 17, wherein however deflection rollers 103 and the adhesive devices 7 are designed so that the vacuum in each case Clearance 102 is effective there is a guide roller 104 there. Achieved this can be done by circumferential and / or deflection roller 103 or through perforated deflection pulleys 104, that is, these are permeable to air, so there the vacuum also works.
  • Figures 19 and 20 show an embodiment an adhesive device 7, in which the adhesive device is designed as a blowing air device, their blowing air essentially along the surface the sheet 3 to be lifted is blown.
  • the underside of the adhesive device points corresponding outlet openings 110, from which Blown air 111 exits, the blown air 111 a Direction that is approximately parallel to the surface a sheet 3 runs.
  • the blowing air 111 creates a negative pressure, so that the Sheet 3 in the direction of the adhesive device 7 is raised.
  • the sheet 3 approaches very much the adhesive device 7, is created by impulse the air flow on the sheet 3 a repulsive Force.
  • the embodiment of Figure 21 relates to a Device 1, in the area of the front edge 11 of the metal sheets 3 of the stack 4- an air nozzle 120 is arranged, from which blown air emerges.
  • the Blown air is drawn off between one already and sheet metal 3 and a sheet 3 in the lift-off according to Figure 21 blown. This prevents that the rear edge of the removed sheet of metal 3 the sheet of metal in the withdrawal 3 touched.
  • the blown air can also be used for this be that the suction effect of the adhesive device 7th is compensated.
  • the blowing nozzle 120 is corresponding for this movable, swiveling or the like arranged to initially vacuum the entire Compensate adhesive device 7 and then to lift a metal sheet 3- initially in the area of Trailing edge 10 to set this compensation, wherein setting continuously in the direction of transport 12 takes place so that there is the vacuum of the adhesive device 7 can unfold and in this way and Way of lifting the sheet 3 takes place.
  • Figure 22 shows an embodiment in which in addition or as an alternative to the air nozzle 120, a stop 130 is provided, both in height (Arrow 132), as well as in the direction of transport (Transport direction 12 according to double arrow 131) can be moved can be positioned. It is recognizable that the stop 130 in the lifting Sheet 3 from the rear edge of the already in the removal located sheet metal 3 keeps so that there is no collision. The position of the stop 130 is preferably dependent on the position of the respective metal sheets 3 changed.
  • Figure 23 shows a further embodiment a device 1, which as an adhesive device 7 endless run 130.
  • the run 130 has an air-impermeable, endless revolving Volume 131, the diametrically opposite places is each provided with a suction hole 132.
  • Inside the run is a vacuum source connected suction box 133.
  • the Run 130 is located above the stack 4, the formed by flexible flat objects 2 is. These are preferably metal sheets 3. Contrary to the direction of transport (Arrow 134) is at the end of run 130 Lifting vacuum 135.
  • the lower area of the run 130 is overlaid with an air-permeable cover 136.
  • the cover 136 is fixed and is a short distance from band 131 on, so that because of the suction holes 132 as Suction tape formed tape 131 is not on the cover 136 scrubs. However, it is also possible to use a use the most abrasion-resistant tape 131 so that contact of the band 131 with the cover 136 is possible without significant abrasion.
  • the adhesive device 7 is on both sides the transport device 8 formed by two suction belt devices 16 is formed.
  • the device according to FIGS. 23 and 24 has The following mode of operation: Using the vacuum cleaner 135 from the stack 4, the topmost object 2 on its facing away from the transport direction 134 End raised. Because of the circumferential run 130 one of its suction holes 132 comes close to the raised area of object 2 and exercise due to the continuous in the direction of transport 134 Movement a suction effect running over the object 2 off, so that the object 2 wave-like progressively to the bottom of cover 136 is sucked in.
  • the two sides of the detention facility 7 arranged suction belt devices 16 are himself during this lifting of the object 2 in the rest position; however, both have a negative pressure effect or a magnetic effect, and therefore hold item 2.
  • Figures 25 to 28 show a further embodiment a device 1 for separating flexible, flat objects 2. It points as Adhesion device 7 considered several in the transport direction by far side-by-side suction cups 140 on by valves 141 from one not shown control device individually controllable are.
  • the adhesive device 7 is located on both sides the transport device according to FIGS. 26 and 28 8, the two suction belt devices 16 having. This results in the following functionality: First, it moves in the opposite direction of transport 134 most distant suction cups 140 down and sits on the object on top 2 and picks it up - held by the Suction - so that the rear area of the flat object 2 is raised.
  • the lifting suction device 135 can be dispensed with, if such strong negative pressure from suction hole 132 on the object 2 is exercised so that this alone is raised by this suction. It is also possible to use a suction cup 135, which none Up and down movement makes one sufficient has strong suction. Regarding the up and down Movement this also applies - after another Embodiment for the execution of the figure 25, so that stationary instead of suction cups Suction cups 140 are arranged, so none Carry out vertical up and down movements.
  • Figure 29 shows a further embodiment a device 1, in which a Length of the object 2 extending suction box or suction bar 150 is provided.
  • the Suction of the suction bar 150 takes place at the end, the opposite of the direction of transport 134 lies.
  • the suction is there with an arrow 151 featured.
  • the representations of Figures 26 and 28 on both sides one suction belt device 16 each assigned, but not shown in Figure 29 are. This results in the following functionality: This is counteracted by means of a suction cup 140 end of the object lying in the direction of transport 134 2 raised and against the squeegee 150 sucked.
  • the suction bar 150 is over its entire Length open downwards so that in the area in which the flat object 2 against the bottom of the suction bar 150 abuts a negative pressure is approaching this underside and consequently develops a suction effect while the not yet approximated area the object 2 of this suction effect not yet is recorded. In this way, the object 2 passing through an undulating elastic Deformation sucked onto the suction bar 150. If this is done, they do not take over illustrated suction belt devices, the on both sides of the suction bar 150, the removal of object 2. From FIG. 30 goes a device designed according to Figure 29 1, but the control elements for influencing of negative pressure.
  • FIG. 30 is within of the suction beam 150 at least one separator 152 arranged, for example as relocatable Folding wall or as a linearly movable Wall can be formed.
  • separator 152 arranged, for example as relocatable Folding wall or as a linearly movable Wall can be formed.
  • reference symbol 153 is a folding wall and one after another Exemplary embodiment - with the reference number 154 a Called sliding wall.
  • the isolators 152 are by means of a device, not shown shifted.
  • the shift is such that can reduce the volume of the suction bar 150, if the folding wall 153 or the sliding wall 154 is so shifted that not all of it Volume acted on by the negative pressure (arrow 151) will, but only part of it. Corresponding the suction effect is greater. However, is already a corresponding part of the flat object 2 sucked in so that this progressively into the Area of the corresponding folding wall 153 or the sliding wall 154 arrives, so the Folding wall 153 folded into the horizontal position or the sliding wall 154 from the inside the suction bar 150 pulled out, which also in the adjoining area of the suction bar 150 Vacuum is formed and therefore progressive the suction of the flexible flat object 2 is done.
  • Figures 29 and 30 can be used for the initial Suction of the flexible object 2 lifting vacuum 140 on the opposite to the transport direction End of the flat object 2 provided be.
  • the suction effect can be achieved by means of the separating members 152 and also the rate of progression the suction effect over the longitudinal extent of the Control item 2.
  • Figure 31 illustrates this using a diagram. On the ordinate is indicated the speed V at which the suction shaft runs over the surface of the object 2; the longitudinal dimension L of the object is on the abscissa 2 applied.
  • the horizontal line 160 shows a linear behavior, that is, the speed of the intake shaft is about the length of the object everywhere equal.
  • it is also progressive behavior adjustable by appropriate control such as this clarifies line 161, that is, over the extension of the object increases the speed the wave. It can, for example in this way an adaptation to the achieve lifting work to be performed.
  • a progressive characteristic curve can also be realized.

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  • Mechanical Engineering (AREA)
  • Sheets, Magazines, And Separation Thereof (AREA)
EP98120960A 1997-11-08 1998-11-05 Méthode et dispositif pour séparer des objets flexibles et plats Withdrawn EP0915041A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE19749498 1997-11-08
DE1997149498 DE19749498C2 (de) 1997-11-08 1997-11-08 Verfahren und Vorrichtung zum Vereinzeln flexibler flächiger Gegenstände
DE19832847A DE19832847C2 (de) 1997-11-08 1998-07-21 Verfahren und Vorrichtung zum Vereinzeln flexibler, flächiger Gegenstände
DE19832847 1998-07-21

Publications (1)

Publication Number Publication Date
EP0915041A1 true EP0915041A1 (fr) 1999-05-12

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EP98120960A Withdrawn EP0915041A1 (fr) 1997-11-08 1998-11-05 Méthode et dispositif pour séparer des objets flexibles et plats

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US (2) US6244586B1 (fr)
EP (1) EP0915041A1 (fr)
JP (1) JPH11217130A (fr)

Cited By (2)

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US20010015520A1 (en) 2001-08-23
US6244586B1 (en) 2001-06-12
US6439565B2 (en) 2002-08-27

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