WO2001076986A1 - Vorrichtung zum hängenden transport von flächigen werkstücken - Google Patents
Vorrichtung zum hängenden transport von flächigen werkstücken Download PDFInfo
- Publication number
- WO2001076986A1 WO2001076986A1 PCT/EP2001/004046 EP0104046W WO0176986A1 WO 2001076986 A1 WO2001076986 A1 WO 2001076986A1 EP 0104046 W EP0104046 W EP 0104046W WO 0176986 A1 WO0176986 A1 WO 0176986A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- drive
- conveyor belts
- conveyor
- shaft
- parking position
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G21/00—Supporting or protective framework or housings for endless load-carriers or traction elements of belt or chain conveyors
- B65G21/20—Means incorporated in, or attached to, framework or housings for guiding load-carriers, traction elements or loads supported on moving surfaces
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G37/00—Combinations of mechanical conveyors of the same kind, or of different kinds, of interest apart from their application in particular machines or use in particular manufacturing processes
- B65G37/02—Flow-sheets for conveyor combinations in warehouses, magazines or workshops
Definitions
- the invention relates to a device for the hanging transport of flat workpieces, in particular of sheet metal or blanks, with a number of jointly driven, rotating conveyor belts and with at least one holding device for the flat workpieces which acts along the transport path and is associated with the conveyor belts.
- Such devices for hanging transport of flat workpieces have been known for a long time. They usually consist of a frame, to which a number of conveyor belts are fastened seated on a common drive shaft, each individual conveyor belt rotating around a conveyor belt body.
- This conveyor belt body contains the holding device, which in most cases consists of a magnetic device for transporting ferromagnetic workpieces.
- the magnetic fields of the magnetic holding device penetrate the conveyor belt and ensure the compensation of the earth's gravity as well as a contact pressure between the workpiece and the conveyor belt. This is usually done by means of permanent magnetic fields, temporary magnetic fields for compensation of the permanent magnetic fields being switchable if necessary in order to let go of the ferromagnetic workpiece again.
- the conveyor belts can have suction openings which interact with vacuum devices arranged in the conveyor belt body and hold the workpieces in place by means of negative pressure.
- the vacuum devices are usually designed so that they can be switched off in order to enable the workpieces to be transferred or deliberately ejected.
- a typical area of application for such a transport device is the mechanical stacking of automatically punched or cut sheets, the surfaces of which should not be scratched: After a sheet coil has been unwound from a decoiler and processed into sheet metal pieces with automatic scissors, the sheet pieces must be taken from the scissors discharge conveyor belt and placed on top of each other in a way that is gentle on the surface.
- the conveyor belts of a transport device mentioned in the introduction take over the sheets from the discharge conveyor belt and transport them hanging to a discharge point at which the sheet metal pieces are stacked on top of one another.
- ferromagnetic sheets are processed, so that magnetic tape conveyors are preferably used.
- a suction belt conveyor is usually used.
- Such a combined magnetic belt-suction belt conveyor does not only offer advantages: For the transport of ferromagnetic workpieces, ie in about 90% of all cases, simple and robust toothed belts can be used as conveyor belts; Complex sealing measures between the conveyor belt and the holding device, as are necessary with suction belt conveyors, can be dispensed with in these cases. Furthermore, iron or steel workpieces have a significantly more abrasive effect on the conveyor belts than aluminum workpieces, which in turn require relatively soft conveyor belts. As a result, such combined devices thus cause unnecessary, high wear on the (suction) conveyor belts, which are particularly complex to manufacture and assemble because of the required sealing.
- freshly cut or punched iron and steel sheets generally have sharp edges which, in the event of a malfunction - namely when a workpiece is positioned and wedged on the transport route - cuts and thus cuts a soft conveyor belt, as is required for vacuum holding devices to make something useless.
- This known device is a combined magnetic tape suction belt conveyor have the advantages, with its problems by separating the combined conveyor belt in a belt intended exclusively for magnetic transport and a conveyor belt arranged directly next to it and exclusively intended for vacuum transport
- the obvious design effort which is greatly increased compared to the other known devices, is said to be due to very short changeover times and small wear amortize the complex suction conveyor belts in a short time.
- both conveyor belts assigned to one another must be movable in the vertical direction in order to render one or the other conveyor belt inactive. This causes a high level of design effort when coupling the conveyor belts to the common drive shaft usually present in such devices, or else a disadvantageous eccentricity of this coupling.
- Pieces of sheet metal are arranged close to each other or moved into a closely adjacent position to each other, since there is always a conveyor belt of the other holding principle in between.
- the object of the invention is to propose a device of the type mentioned at the outset, which can be selected with little production outlay and high operational reliability - Transport of ferromagnetic workpieces and non-ferromagnetic workpieces possible with short changeover times.
- a device according to the invention for the hanging transport of flat workpieces, in particular of sheet metal or blanks, with a number of jointly driven, rotating conveyor belts and with at least one holding device for the flat workpieces which acts along the transport path and is associated with the conveyor belts is designed such that the conveyor belts together with the associated holding device or
- Holding devices can be moved out of the conveying area into a parking position decoupled from the drive.
- the conveyor belts moved there can be exchanged without problems, without having to pull out the common drive shaft that is normally present from the overall device, as is customary in the prior art. So it is not only possible to replace simple and robust magnetic conveyor belts with suction conveyor belts with very short changeover times, but the device is also future-compatible as a result, because retrofitting with conveyor belts of a conveyor principle that is not yet known is just as easy and quick.
- the invention also facilitates replacement of a damaged conveyor belt. At the same time, all disadvantages and problems of a combined magnetic-vacuum conveying device are avoided.
- conveyor belts that are not required can be moved into the parking position for the transport of small metal sheets and thus decoupled from the drive train, which minimizes the wear and the energy requirement of the overall device.
- Principles in one and the same device and within a short time of ⁇ convert one principle (e.g. magnetic conveyor belts) to the other principle (e.g. suction conveyor belts), simply by moving the conveyor belt group that is not required to one of the two parking positions and the other conveyor belt group from their parking position to the conveyor area. According to this embodiment of the invention, it is even possible to replace a defective belt or to retrofit the device during production.
- one principle e.g. magnetic conveyor belts
- suction conveyor belts e.g. suction conveyor belts
- At least one guide running transversely to the conveying direction is preferably provided on the frame of the device, along which at least some of the conveyor belts are held laterally displaceable, the guide extending to at least one parking position.
- This guide can run from a left to a right parking position and keep all conveyor belts movable; but it can also, for example, two different guides for two different
- Conveyor belt groups are provided, each guide then only reaching the parking position assigned to its respective conveyor belt group.
- the conveyor belts located in the conveyor area are preferably coupled to a common drive shaft, the coupling being designed such that it allows the conveyor belts to be laterally displaceable.
- the drive shaft is designed as a polygonal shaft or as a grooved shaft and each conveyor belt has a driving wheel that can be positively placed on and removed from the drive shaft.
- Such a drive wheel is in positive engagement at any point on a drive shaft designed in this way, so that a stepless displacement of each conveyor belt along the transverse guide is possible without problems and without interrupting the flow of force.
- a drive shaft is preferably used which has two opposite, concave-shaped sections in its cross section.
- a cross section corresponding to a hexagon, from which two opposite sides are folded towards the shaft axis, has proven particularly useful, so that this creates two opposite, concave-shaped sections of the drive shaft.
- the drive wheel can be supported, for example, with slide or ball bearings on the almost radially extending shoulders of these concave sections, as a result of which a geometrically advantageous form fit between the drive shaft and Driving wheel results and at the same time the driving wheel can nevertheless be moved very easily axially on the drive shaft.
- the drive shaft is connected to the drive motor via a detachable drive train; because a non-detachable drive train would hinder the free lateral displacement of the conveyor belts.
- Such a releasable drive train can be realized in that the
- Drive shaft is connected to the drive motor via at least one terminally arranged drive wheel, and that the drive wheel sits positively on the drive shaft, can be removed from it and is part of a pivotable drive belt set or gear transmission set:
- the pivotable drive belt set or gear transmission set are first shifted laterally until the drive wheel is pulled off beyond the end of the drive shaft.
- the drive belt set or gear transmission set is then pivoted, in particular to remove the drive wheel from the travel range of the conveyor belts or their drive wheels.
- the conveyor belts can then be moved into their parking position by very simple lateral displacement, wherein they are pulled off the drive shaft and are therefore decoupled from the drive train.
- conveyor belts can easily be threaded onto the drive shaft with their drive wheels and moved into their active position.
- the drive motor with its gear shaft can be displaced parallel to the axis of the drive shaft, the pivotable drive belt set or gear transmission set being moved together with the drive motor:
- the pivotable drive belt set or gear transmission set for pulling off the drive wheel can be very easily together with the drive motor and the possibly existing transmission are laterally shifted and then pivoted without having to release the coupling to the drive motor.
- the drive shaft As far as the drive shaft, as usual, is held at its ends by two drive belt sets or two gear transmission sets, it is expedient if one - Additional, on the frame of the device, temporarily usable support device for the drive shaft, for example a pair of pliers, is provided which holds the drive shaft in position during the lateral displacement of the conveyor belts. This prevents an impermissibly high bearing load on the drive wheels and ensures safe threading of the drive wheels of conveyor belts that are to be moved from the parking position into the conveyor area.
- temporarily usable support device for the drive shaft for example a pair of pliers
- an existing, transverse to the conveying direction of a device according to the invention is assigned a preferably uniaxial manipulator for lateral displacement and positioning of the conveyor belts, this manipulator being attached to the guide itself or on a separate travel axis on the frame of the device ,
- the manipulator can be controlled electronically, in particular via a control programmable device.
- Such a manipulator can be viewed as a uniaxial robot which, instead of the previously conventional, form-fitting connection of the conveyor belts to the frame of the device, ensures free and very rapid displacement of the conveyor belts.
- Both the shifting of individual conveyor belts or entire conveyor belt groups into their respective parking position and the setting of the distance between two conveyor belts can be carried out very easily by means of the manipulator, in particular if this can be controlled electronically.
- the control can be carried out in real time or by means of a selected program sequence.
- the previously existing spindles and associated actuators for the transverse displacement of conveyor belts are no longer required. Since the manipulator allows all conveyor belts to be moved freely, they can be pushed together into their parking position in groups in a very short time using a simple program command or fanned out from the parking position for activation.
- the conveyor belts can preferably be fixed on the guide assigned to them using the manipulator in order to be able to hold them in a defined position. This determination is preferably carried out by means of clamping or latching
- Release device is provided for releasing the locking devices. If the
- Locking devices are designed self-locking, it is sufficient if the - Disengaging device of the manipulator when detecting a conveyor belt to be displaced releases this self-locking and keeps it released during the lateral movement; when the conveyor belt is released by the manipulator, the manipulator then automatically locks itself in the corresponding position of the conveyor area or in the parking position.
- Figure 1 is a schematic front view of a device according to the invention.
- Figure 2 is a side sectional view along A-A of Figure 1;
- FIG. 3 shows a side partial sectional view along B-B according to FIG. 1.
- Figure 1 shows only a schematic front view of an embodiment of the invention: It is a sheet stacking device with a total of six first conveyor belts 1, which sit on a common drive shaft 10.
- the first conveyor belts 1 each run around a conveyor belt body (not visible here) which contains a magnetic holding device.
- the first conveyor belts 1 are thus used for the hanging transport of ferromagnetic sheets, the direction of transport being perpendicular to the image plane.
- a first parking position 3 and a second parking position 4 for the conveyor belts are provided within a frame 18 of the device.
- the first parking position 3 is intended for the first conveyor belts 1, whereas in the second parking position 4 a set of six second conveyor belts 2 is kept.
- the second conveyor belts 2 are therefore suitable for transporting and stacking non-ferromagnetic sheets, in particular aluminum sheets.
- the first conveyor belts 1 and second conveyor belts 2 are each suspended with a symbolically illustrated suspension 9 on a guide 5 running transversely to the transport direction over the entire width of the frame 18.
- a manipulator 6, which is provided with its own motor 7, is moved along the guide 5 in a programmable manner. With its help, the first and second conveyor belts 1, 2 in the - Move parking positions 3, 4 as well as get them and spread them out as desired over the drive shaft 10. It is also possible that two conveyor belts 1, 2 are arranged very close to each other in order to be able to transport particularly small sheets. The positioning of the conveyor belts 1, 2 is facilitated in that a rack 8 is attached to the guide 5, on which the suspensions 9 of the conveyor belts 1, 2 are each positively fixed by the manipulator 6 by means of a locking device.
- the drive for the drive shaft 10 is attached: two synchronized motors 13, 14 with associated gears 15, 16 are connected via a first drive train 11 and a second drive train 12, the construction of which is closer below is explained, with the drive shaft 10 in operative connection.
- the drive trains 11, 12 also function here as bearings for the drive shaft 10.
- the two drive blocks, consisting of drive motors 13, 14, gears 15, 16 and drive trains 11, 12 are on
- Frame 18 slidably supported, as indicated by the two double arrows.
- the two drive blocks are shifted until the engagement of the first drive train 11 and the second drive train 12 coincides the drive shaft 10 releases. Thereafter, the drive trains 11, 12 are pivoted away about the motor axis, so that the conveyor belts 1, 2 can be moved freely over the entire width of the guide 5.
- the drive shaft 10 is held by the still threaded conveyor belts 1, 2;
- a support device 17, which is only hinted at here, can be provided which, for example, grips and supports the drive shaft 10 with pliers.
- Figure 2 shows a partial sectional view of a view along the line A-A in Figure 1.
- the drive motors 13 and 14 with their gears 15 and 16 are shown for the sake of clarity above the part of the frame 18 belonging to the guide 5.
- the drive blocks actually sit behind this part of the frame 18 which is designed as a double-T beam.
- the first drive train 11 assigned to the first drive motor 13 is here in engagement with the drive shaft 10 and, in dash-dotted lines, is pivoted away
- a drive wheel 19 which can be positively placed on the drive shaft 10, which is provided with a concave section in cross section, and can be moved along this drive shaft, one on the gear shaft 22 of the - Gear 15 seated driven gear 23 and a drive belt 21 connecting the drive gear 19 and the driven gear 23, which together form a drive belt set 20.
- This drive belt set 20 is pivoted pneumatically by a lifting cylinder 26 pivotally attached to the frame 18 and its piston rod 27 attached to the drive belt set 20.
- the movability of the drive block consisting of drive motor 13, gear 15 and drive belt set 20 is ensured by two slide rails 24, on which a drive block holder 25 is slidably held.
- a bolt 35 provides a positive connection between the drive block and the frame 18 in order to absorb the torques acting on the drive block. This type of positive connection nevertheless allows the drive block to move along the slide rails 24.
- FIG. 2 shows in more detail how the conveyor belt 1 is fastened via its conveyor belt body 28 to the guide 5, which is also designed as a slide rail: a holder 29 attached to the side of the conveyor belt body 28 facing away from the viewer carries the suspension 9, which is guided by the guide 5 is held slidably.
- the holder 29 carries a locking device 30 which interacts with a rack 8 attached to the guide 5 or to the frame 18.
- the manipulator 6, which can be moved parallel to the guide 5, is in turn provided with a disengaging device 31 in order to pull a spring-loaded guide piece of the locking device 30 out of engagement with the toothed rack 8 and, after the conveyor belt 1 has been moved, to let it go again, so that he snaps back into the rack and creates a positive connection between the conveyor belt body 28 and the frame 18.
- the rack 8 can be provided with bevels.
- FIG. 2 the cross section of a preferably used drive shaft 10, which corresponds to a hexagon, from which two opposite sides are folded inwards towards the center point and thus each form a concavely shaped section, is also illustrated with reference to FIG. 2. As can be seen very well from the drawing, this results in a total of four almost radially extending surfaces, which ensure optimal power transmission between the drive shaft 10 and the drive wheel 19.
- the drive wheel 19 is preferably placed on the drive shaft 10 via roller bearings (not shown here) which are supported on the radial surfaces.
- FIG. 3 finally shows schematically how the support device 17 attached to the frame 18 for holding the drive shaft 0 during the conveyor belt change can look like:
- This is a support pliers 32 with clamping jaws 33 which are adapted to the concave shapes of the cross section of the drive shaft 10.
- the rest position 34 of this support forceps 32 is indicated by dash-dotted lines. From this it can be seen that the support tongs 32 do not interfere with the normal operation of the device.
- each of the guides 5 can also be provided in the context of the present invention. These each span the entire width of the frame 18 or only a part, because if one of the two parking positions 3, 4 is assigned only one guide 5, this does not have to extend beyond the other parking position 3, 4. It should also be mentioned that each of the guides 5 can be equipped with a manipulator 6. Within the scope of the invention it is of course also possible to assign more than one manipulator 6 to a single guide 5 in order to accelerate the displacement of the conveyor belts 1, 2.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Specific Conveyance Elements (AREA)
- Structure Of Belt Conveyors (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2001263845A AU2001263845A1 (en) | 2000-04-11 | 2001-04-09 | Device for transporting two-dimensional workpieces in a suspended manner |
EP01938096A EP1272407A1 (de) | 2000-04-11 | 2001-04-09 | Vorrichtung zum hängenden transport von flächigen werkstücken |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2000117738 DE10017738A1 (de) | 2000-04-11 | 2000-04-11 | Vorrichtung zum hängenden Transport von flächigen Werkstücken |
DE10017738.7 | 2000-04-11 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2001076986A1 true WO2001076986A1 (de) | 2001-10-18 |
Family
ID=7638204
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2001/004046 WO2001076986A1 (de) | 2000-04-11 | 2001-04-09 | Vorrichtung zum hängenden transport von flächigen werkstücken |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1272407A1 (de) |
AU (1) | AU2001263845A1 (de) |
DE (1) | DE10017738A1 (de) |
WO (1) | WO2001076986A1 (de) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10327088A1 (de) | 2003-06-13 | 2004-12-30 | Sundwig Gmbh | Vorrichtung zum hängenden Transport von flächigen Werkstücken |
DE102018221357A1 (de) * | 2018-12-10 | 2020-06-10 | Volkswagen Aktiengesellschaft | Transporteinrichtung, Transportsystem und Verfahren zum Transport von Gegenständen |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0658497A2 (de) * | 1993-12-15 | 1995-06-21 | SCHULER PRESSEN GmbH & Co. | Mit Saugluft arbeitende Vorrichtung zum hängenden Transport von Blechen |
DE19636086A1 (de) | 1996-09-06 | 1998-03-12 | Nsm Magnettechnik Gmbh | Magnetbandförderer für den hängenden Transport von Blechen o. dgl. |
EP0893372A1 (de) | 1997-07-24 | 1999-01-27 | Neuhäuser GMBH + CO. | Vorrichtung zum Transport von Werkstücken, insbesondere von hängenden, tafelförmigen Werkstücken |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19729316A1 (de) * | 1997-07-09 | 1999-01-14 | Erfurt Umformtechnik Gmbh | Platinenzuführeinrichtung für eine Umformanlage |
DE19731901C2 (de) * | 1997-07-24 | 1999-06-02 | Neuhaeuser Gmbh & Co | Vorrichtung zum insbesondere hängenden Transport von Werkstücken, insbesondere tafelförmigen Werkstücken wie Blechen oder Platten |
DE29816204U1 (de) * | 1998-09-09 | 1998-10-29 | Liebherr-Mischtechnik Gmbh, 88427 Bad Schussenried | Vorrichtung zur Zuführung von magnetisierbarem Fördergut |
-
2000
- 2000-04-11 DE DE2000117738 patent/DE10017738A1/de not_active Withdrawn
-
2001
- 2001-04-09 EP EP01938096A patent/EP1272407A1/de not_active Withdrawn
- 2001-04-09 WO PCT/EP2001/004046 patent/WO2001076986A1/de not_active Application Discontinuation
- 2001-04-09 AU AU2001263845A patent/AU2001263845A1/en not_active Abandoned
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0658497A2 (de) * | 1993-12-15 | 1995-06-21 | SCHULER PRESSEN GmbH & Co. | Mit Saugluft arbeitende Vorrichtung zum hängenden Transport von Blechen |
DE19636086A1 (de) | 1996-09-06 | 1998-03-12 | Nsm Magnettechnik Gmbh | Magnetbandförderer für den hängenden Transport von Blechen o. dgl. |
EP0893372A1 (de) | 1997-07-24 | 1999-01-27 | Neuhäuser GMBH + CO. | Vorrichtung zum Transport von Werkstücken, insbesondere von hängenden, tafelförmigen Werkstücken |
Also Published As
Publication number | Publication date |
---|---|
EP1272407A1 (de) | 2003-01-08 |
AU2001263845A1 (en) | 2001-10-23 |
DE10017738A1 (de) | 2001-10-18 |
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