EP0140200B1 - Device to pick up flat work pieces - Google Patents

Abstract

An apparatus for picking up, transporting and exactly depositing planar work pieces, particularly cloth parts, comprises lifting devices which can be moved over work piece deposition points. The lifting devices comprise a pressure plate having a plurality of adhesive-tape pickups removably fixed thereon, e.g., by adhesion magnets. The adhesive-tape pick ups can be easily moved to any number of selectable points on the pressure plate in order to conform to the work piece to be picked up. The adhesive-tape pickups comprise a tubular housing having disposed therein a longitudinally movable adhesive-tape winding device with associated table deflection rolls. The tubular member has a baffle plate located at the bottom thereof. The baffle plate is provided with apertures. The tape deflection rollers protrude slightly through these apertures presenting adhesive tape for picking up a work piece when the apparatus is positioned at a pickup point. When the apparatus is positioned at a workpiece deposition point, lowering of the pressure plate at the deposition point causes the tape deflection rollers to be retracted within the apertures and work piece is stripped off by the baffle plate.

Description

The invention relates to a device for picking up, transporting and precisely depositing flat workpieces, in particular fabric parts, from at least a first depositing point to a second depositing point, consisting of a moving or rotating platform bridging the depositing points and equipped with at least one lifting device, in which the lifting device working according to the adhesive principle of action also includes in the form of an adhesive tape pickup arrangement, in which the adhesive tape pickup arrangement also consists of an adhesive tape winding device which is longitudinally displaceable on a frame in a guided holder and has tape deflection rollers which are provided on the side of the frame base and which represent adhesive rolls and the frame base through suitable openings for the passage of the adhesive tape in the area of the tape deflection rollers in the receiving sliding position of the adhesive tape winding device is designed to form a scraper plate and in which the up / down control of the sliding position de r tape winding device in the holder depending on the movement of the lifting device, taking into account the gradual further transport of the adhesive tape, is made such that the tape winding device when lowering the lifting device at the location of a first storage location with the tape in the area of its adhesive rollers to be transported The workpiece is gripped, held in place in the raised state of the lifting device during transport and released again at the location of the second storage location after the lifting device has been lowered.

Devices of this type, as are known from US Pat. No. 3,083,961, serve to automate sub-processes in the field of industrial production. Automation is of particular importance in the field of ready-made clothing, since manufacturing here is still very cost-intensive compared to other manufacturing areas and rationalization measures are essential in view of the increasing cost pressure.

As the literature "Apparel and Knitwear" 22, (1983), No. 1, pages 6 to 11, explains, it is particularly difficult when stacking fabric parts to lift such a flat workpiece perfectly from a workpiece stack and in a prescribed position for store its further processing at another location, for example also on a stack. With sensors that work according to the pneumatic principle, only textile fabrics that have a sufficiently low air permeability can be picked up and transported properly. The preferred pickups working according to the mechanical principle use gripping systems which are equipped with pickup needles or clamping devices. As practice shows, however, such gripping systems have a relatively low reliability and cannot be optimally adapted to the widely differing material properties of such flat workpieces in every case. Pickups working according to the adhesive principle of action are also problematic, although different material properties do not play a major role here, because the adhesive force decreases with the period of use and, moreover, also contaminate the adhesive surfaces. For this reason, practically only adhesive tape pick-up arrangements with adhesive tape winding devices can be used here in order to be able to constantly renew the adhesive surfaces in the course of the work processes. As the adhesive tape pickup arrangement according to the aforementioned US Pat. No. 3,083,961 shows, such a pickup is a relatively voluminous and complicated construction which practically does not allow adaptation to workpieces to be picked up with different dimensions. In the field of ready-made clothing, however, such transducer devices have to be highly flexible because the workpieces in the form of fabric parts can vary greatly in size, as well as in size, for the same size.

The invention is based on the object of specifying a further solution for an adhesive tape pickup arrangement for a device of the type described in the introduction, which, with relatively little technical effort, has a high degree of flexibility in adapting to flat workpieces of virtually any shape with high operational reliability.

This object is achieved on the basis of such a device according to the invention by the features specified in the characterizing part of patent claim 1.

The invention is based on the essential finding that a high degree of flexibility in adapting the pick-up arrangement to the shape of the workpieces to be picked up can be brought about in an extremely advantageous manner in that the pick-up arrangement is subdivided into a plurality of tubular pick-ups each representing an independent functional unit, which because of their independent functional properties a printing plate representing a common base plate can be fixed in practically any arrangement and can hardly be hindered by the finger shape with regard to their mutual arrangement, that is to say they can always be optimally aligned in their overall arrangement on the printing plate to the shape of a flat workpiece to be picked up.

In a particularly preferred embodiment of the device for automatically placing flat workpieces to be fixed together on the one from a feed to the fixation press-formed press input side, a first depositing point, preferably in the form of a magazine stacking the workpieces to be processed, is provided on both sides of the feed line representing the second depositing point. Here, the running platform bridging the three storage locations has, on a slide that can be moved along the running platform, two lifting devices which are arranged one behind the other in the running direction and at a distance from the second storage location from a first storage location and are synchronously controlled in their movement sequence. In this way, it is achieved that a workpiece can be placed on the second depositing point with each movement of the slide, while at the same time a picking-up process can also take place at each of the first two depositing points.

The situation is particularly favorable if the first storage locations are stack of workpieces that hold magazines accessible from above, the lateral boundaries of which are realized by brush elements with bristles oriented sideways and slightly downwards, and these brush elements adapt to the outer contour of a stack of workpieces on a base plate made of ferrous metal, for example a steel plate, can be fixed at a freely selectable location by means of holding magnets attached to the brush elements.

As extensive studies on which the invention is based have shown, the adhesive tape transducers in one of the outer shaping of the workpieces to be accommodated according to arrangement and number on the printing plate are outstandingly suitable for a clean separation of the workpieces stored in a stack when brush magazines are given in the specified one Dimensioning is used. One of the reasons for this is that not only the number and arrangement of the adhesive tape receivers, but also the brush elements that together form a brush magazine, are optimally adaptable according to the number and position of the outer contour and the area size of the workpieces combined in a stack.

Further advantageous refinements of the brush magazines are specified in claims 4 and 5.

The switching of the adhesive tape winding devices integrated in the adhesive tape receptacles, which is necessary in the course of the operating procedure, expediently takes place during the displacement of the adhesive tape winding device within the tubular housing in the area between its receiving and stripping sliding positions. A useful embodiment for this is specified in claim 6.

Since the adhesive tape in the adhesive tape winding device experiences wear during operation and has to be renewed from time to time, it proves to be very expedient to replace the adhesive tape winding device. to design plug-in unit on the guided holder and for this purpose to make the interior of the tubular housing accessible through a suitably dimensioned removable cover.

In a particularly preferred embodiment of an adhesive tape pickup, the guided holder of the adhesive tape winding device is connected to the piston rod of a small compressed air cylinder accommodated on the side of the pressure plate in the tubular housing, which is connected via electrically controllable air valves and air hoses to a compressed air distributor arranged on the pressure plate. Here, the compressed air cylinder is controlled in the desired correspondence with the movement of the lifting device. The use of a compressed air cylinder as a displacement drive for the adhesive tape winding device has the advantage of particularly simple assembly in the production of such sensors. Furthermore, such a compressed air cylinder enables a pressure of the adhesive tape on the flat workpiece to be lifted which can be set within wide limits, so that the required adhesion can be set as required for the most diverse materials of such workpieces. Such a compressed air cylinder also allows the stroke to be set within relatively wide limits.

In order to also ensure any arrangement across the pressure plate with the shortest possible connection hoses in such an adhesive tape transducer working with a compressed air cylinder, the compressed air distributor is expediently a distribution strip extending along the width and / or length of the pressure plate with a large number of quick contact closures for the air hoses to be connected.

Further advantageous designs of adhesive tape pickups are specified in claims 10 to 12.

• Figur 1 schematische Darstellung einer Vorrichtung für das automatische Auflegen von miteinander zu fixierenden Stoffteilen auf der Eigangsseite einer Fixierpresse in einer ersten Aufnahme- und Ablegeposition.
• Figur 2 die Vorrichtung nach Fig. 1 in einer zweiten Aufnahme- und Ablegeposition.
• Figur 3 die perspektivische Darstellung einer Preßluftverteilerleiste für den Anschluß von mit Preßluftantrieben gestalteten Klebeband-Aufnehmern.
• Figur 4 die schematische Darstellung eines mit Preßluft arbeitenden Klebeband-Aufnehmers mit der Klebeband-Wickelvorrichtung in der oberen Abstreif-Schiebestellung.
• Figur 5 der Klebeband-Aufnehmer nach Fig. 4 mit der Klebeband-Wickelvorrichtung in der unteren Aufnahme-Schiebestellung.
• Figur 6 eine Variante eines Klebeband-Aufnehmers nach Art der Fig. 4 und 5 in Explosionsdarstellung für eine als austauschbare Einheit gestaltete Klebeband-Wickelvorrichtung.
• Figur 7 eine erste Ausführungsform einer als Einheit gestalteten Klebeband-Wickelvorrichtung.
• Figur 8 eine zweite Ausführungsform einer als Einheit gestalteten Klebeband-Wickelvorrichtung.
• Figur 9 eine erste Ausführungsform eines Klebeband-Aufnehmers mit über eine Druckhaube in Abhängigkeit der Hubbewegung der Hubeinrichtung betätigten Verschiebung der Klebeband-Wickelvorrichtung.
• Figur 10 eine zweite Ausführungsform eines Klebeband-Aufnehmers mit über eine Druckhaube in Abhängigkeit der Hubbewegung der Hubeinrichtung betätigten Verschiebung der Klebeband-Wickelvorrichtung.
• Figur 11 eine dritte Ausführungsform eines Klebeband-Aufnehmers mit über eine Druckhaube in Abhängigkeit der Hubbewegung der Hubeinrichtung verschiebbaren Klebeband-Wickelvorrichtung.
• Figur 12 ein Bürstenmagazin im Schnitt.
• Figur 13 eine Aufsicht auf ein Bürstenmagazin für Sakko-Vorderteile.
• Figur 14 die Aufsicht auf ein Bürstenmagazin für Kragenteile.

The invention will be explained in more detail below with reference to exemplary embodiments shown in the drawing. In the drawing:

• Figure 1 is a schematic representation of a device for the automatic placement of parts to be fixed together on the entry side of a fixing press in a first pick-up and drop-off position.
• Figure 2 shows the device of FIG. 1 in a second pick-up and put-down position.
• Figure 3 is a perspective view of a compressed air distribution strip for the connection of adhesive tape transducers designed with compressed air drives.
• Figure 4 is a schematic representation of a tape receiver working with compressed air with the tape winding device in the upper stripping-sliding position.
• Figure 5 shows the tape pickup of FIG. 4 with the tape winding device in the lower receiving-sliding position.
• Figure 6 shows a variant of an adhesive tape 4 and 5 in an exploded view for an adhesive tape winding device designed as an interchangeable unit.
• FIG. 7 shows a first embodiment of an adhesive tape winding device designed as a unit.
• Figure 8 shows a second embodiment of an adhesive tape winding device designed as a unit.
• 9 shows a first embodiment of an adhesive tape pickup with a displacement of the adhesive tape winding device actuated via a pressure hood as a function of the lifting movement of the lifting device.
• 10 shows a second embodiment of an adhesive tape pickup with a displacement of the adhesive tape winding device actuated via a pressure hood as a function of the lifting movement of the lifting device.
• FIG. 11 shows a third embodiment of an adhesive tape pickup with an adhesive tape winding device which can be displaced via a pressure hood as a function of the lifting movement of the lifting device.
• Figure 12 is a brush magazine in section.
• Figure 13 is a plan view of a brush magazine for jacket front parts.
• Figure 14 is a top view of a brush magazine for collar parts.

The device according to FIGS. 1 and 2 for the input side of a fixing press consists of a frame-like running platform 1 which bridges three storage locations arranged next to one another. The middle depositing point, which is used by a feed, for example in the form of a conveyor belt to feed the workpieces to be fixed together in a fixing press, represents a second depositing point A2. To the right and left of this second depositing point A2 are first depositing points A1a and A1b, which here are workpiece stacks receiving magazines 31 and 32. On the top of the moving platform 1 there is a carriage 4 which can be moved over the storage locations and whose reciprocating movement takes place via a compressed air cylinder 5 attached to the carriage 4. The piston rod 5a of this compressed air cylinder 5 is fastened with its free end to the holder 5b on the right upper side of the moving platform 1. Two lifting devices H1 and H2 are arranged one behind the other on the carriage 4 at a distance from the second depositing point A2 from the first depositing points A1a and A1b. They each consist of a pressure plate DP, each of which is attached to the piston rod 61 of a vertically oriented compressed air cylinder 6 on its upper side and has a plurality of adhesive tape receivers KA that can be fixed at any point on the underside by fastening means, preferably holding magnets. Quick fasteners can also be used as fastening means, which engage in one of the numerous openings of a pressure plate provided with a perforated grid. A hole-patterned pressure plate also enables the KA tape adapters to be attached using screws.

The compressed air cylinders 5 and 6, which represent pneumatic drives, are controlled via electrically controllable valves (not shown). 1, the carriage 4 is just in the left end position and the lifting devices H1 and H2 have carried out a downward lifting movement. In this position, the adhesive tape receivers KA of the lifting device H1 remove a workpiece, for example a fabric part, from the workpiece stack in the magazine 31 at the first storage location A1a, whereas the lifting device H2, assuming the start of operation, does not yet perform a storage function.

In a next step, the pressure plates DP of the two lifting devices H1 and H2 make an upward stroke and are moved with the carriage 4 via the compressed air cylinder 5 into the right end position, as shown in FIG. 2. When the pressure plates DP are subsequently lowered, the lifting device H1 deposits the part of the material picked up by the first storage location A1 at the second storage location A2 and at the same time a workpiece, for example, a workpiece, for example, from the workpiece stack in the magazine 32 at the first storage location A1b by the adhesive tape receivers KA of the lifting facility a fixation insert. After the pressure plates DP of the two lifting devices H1 and H2 have been raised and the carriage 4 has been displaced via the compressed air cylinder 5 into the left end position shown in FIG. 1, the lifting devices H1 and H2 are again lowered, and in this case those on the free ends of the adhesive tape receivers KA the fixing device adhering to the lifting device H2 is deposited exactly over the already deposited fabric part at the second storage location A2. At the same time, the adhesive tape pickups KA of the lifting device H1 in turn pick up a workpiece from the workpiece stack in the magazine 31. In this way it is achieved that with each movement of the carriage 4 and a lifting movement of the two lifting devices H1 and H2, a workpiece is simultaneously picked up at a first storage location and deposited at the second storage location. As soon as the two workpieces to be fixed together are deposited at the second storage location A2, the conveyor belt representing the second storage location A2 starts to move and conveys the parts of the fabric to be fixed together into the press.

As will be explained in more detail, a preferred embodiment for the displacement movement of the tape winding device provided in an adhesive tape pickup also has a compressed air cylinder which is actuated in the same way as the compressed air cylinders 5 and 6 via electrically controlled valves and via hose lines to one Compressed air distributor is connected. In order to get by with a freely selectable fixing of such an adhesive tape transducer over the surface of the pressure plate DP with relatively short hoses, a compressed air distributor is in the form of an edge over the width and / or length of the pressure plate extending distributor bar provided, which is shown in Figure 1 at the lifting device H2 and is designated VL.

This distributor strip VL is shown in perspective in FIG. 3. It has two metal rods 7 lying one above the other, which have a bore 71 with a screw connection 72 in their extension and furthermore have a number of quick-action closures 73, which are connected to the axial bore of the metal rods 7, and are distributed over their length.

The first exemplary embodiment of an adhesive tape pickup KA shown in section in FIGS. 4 and 5 consists of a tubular housing 8, which is closed at the top by a plate 10 with integrated holding magnets 11 for fixing the adhesive tape pickup on the pressure plate of the lifting device . On the side of the plate 10, a compressed air cylinder 9 is fastened on an intermediate plate 12 for the displacement of the adhesive tape winding device from an upper stripping-sliding position, as shown in FIG. 4, into a lower receiving-sliding position, as shown in FIG. 5, in which the holder 13 for the tape winding device KW is guided at the same time. At its lower free end, the tubular housing 8 has an end plate 81 which is provided with openings 82 for the passage of the deflection rollers 14 which are provided on the underside of the adhesive tape winding device and represent adhesive rollers. The adhesive tape winding device KW also has, in addition to a further smaller deflecting roller 14a arranged between the deflecting rollers 14, one above the other in pins 15 and 16 rotatably mounted, an adhesive tape unwinding spool 17 and an adhesive tape winding spool 18. With the adhesive tape take-up reel 18, a gear 19 is additionally rotatably provided on the pin 16, which, in the manner of a locking mechanism, results in a sliding movement of the adhesive tape winding device KW from its lower take-up sliding position into its upper stripping-sliding position with one on the tubular housing 8 attached driver 20 is engaged over a rotation angle range determined by the toothing of the gear 19. In this way it is achieved that after stripping a workpiece, the adhesive surfaces of the adhesive tape KB and the deflection rollers 14, which were in close contact with the workpiece during the pick-up and transport from a first storage location to the second storage location, a bit via the deflection rollers 14 be transported further and thus, in the successive pick-up and depositing processes, unused adhesive tape KB is repeatedly made available for picking up workpieces.

With reference to Figures 1 and 2, the displacement movement of the tape winding device KW by the compressed air cylinder 9 takes place in accordance with the lifting movement of the lifting devices H1 and H2 in such a way that, for example, when lowering the lifting device H1 according to Figure 1, for receiving a workpiece from Workpiece stack in the magazine 31 of the first storage location A1a, the tape winding device is brought from its upper stripping-sliding position into its lower receiving-sliding position, in which the deflection rollers 14 with the adhesive tape KB pass slightly through the openings 82 of the end plate 81 and there during the further downward stroke the lifting device H1 are pressed against the workpiece to be picked up. When the lifting device H1 is lifted, the adhesive tape winding device remains in the lower receiving / sliding position, namely until the lifting device H1 has arrived above the second storage area A2 in accordance with FIG. 2 and has lowered to the second storage area in a further downward stroke. Now, in the lowered stroke position of the lifting device H1, the adhesive tape winding device KW is shifted from its lower receiving and sliding position into its upper stripping and sliding position. As illustrated in FIG. 5, the driver 20 now comes into engagement with the gearwheel 19 and the aforementioned further transport of the adhesive tape KB takes place while the adhesive tape winding device KW is being moved upward. At the same time, the end plate 81 of the tubular housing acts as a scraper for the workpiece adhering to the adhesive tape KB in the region of the deflection rollers 14. The transport length of the adhesive tape KB, which is carried out during a displacement of the adhesive tape winding device KW upward, can be determined by selecting the number of teeth of the gear wheel 19.

The consumption of adhesive tape KB during the operational sequence makes it necessary to replace a used adhesive tape roll from time to time with a new adhesive tape roll. In order to make the situation as simple as possible here, as FIG. 6 shows in one exemplary embodiment, it makes sense to carry out the interchangeable tape winding device in the form of a unit E which can be plugged onto the guided holder 13 with the gear 19 and the pin 16. The unit E here consists of a carrier plate 21, on which the deflection rollers 14 and 14a, the adhesive tape unwinding spool 17 and the adhesive tape takeup spool 18 are held in a predetermined position one above the other. The pivot pin 15 for the adhesive tape unwinding spool 17 is in this case fastened to the carrier plate 21 and has a counter bearing 22 on the guided holder 13. The same applies to the belt deflection rollers 14 and 14a rotatably mounted on the pin 23. The counter bearings are designated by 24 in FIG. Furthermore, the gearwheel 19 has driver pins 25 on both sides of the pin 16, which engage in correspondingly arranged recesses in the adhesive tape take-up spool 18 (not shown in FIG. 6) when the unit E is plugged onto the guided holder 13.

As can be seen further in FIG. 6, the tubular housing 8 is firmly attached to the guide Th bracket 13 connected housing part and a removable cover 8a divided. When the unit E is plugged onto the guided holder 13, the cover 8a engages at its upper end in a groove 26 in the plate 10. Furthermore, the pin 16 protrudes through the unit E and an opening 27 in the cover 8a and enables the cover 8a to be screwed to the housing part by means of a screw nut 28 due to its thread at its free end.

FIGS. 7 and 8 also show two differently designed adhesive tape winding devices designed as interchangeable units E. The unit E according to FIG. 7 corresponds to the embodiment shown in FIGS. 4 and 5, in which a larger deflecting roller 14 with an inwardly displaced smaller deflecting roller 14a is provided on the underside on each side. This results in an adhesive tape location on the circumference of a deflection roller 14 for receiving a workpiece.

The embodiment according to FIG. 8 is particularly suitable when the flat workpieces to be picked up require a larger adhesive surface due to their own weight. This is achieved here in that the middle deflection roller 14a is made larger and is used as a support for the adhesive tape KB stretched between the deflection rollers 14. It goes without saying that, in the embodiment according to FIG. 8, the end plate 81 of the tubular housing 8, in contrast to FIGS. 4 and 5, is to be provided with a single rectangular opening running between the deflection rollers 14.

The further preferred exemplary embodiments of adhesive tape sensors shown in FIGS. 9, 10 and 11 differ from the preferred exemplary embodiment of an adhesive tape sensor shown in FIGS. 4 and 5 in that they are closed off on the side of the printing plate with a pressure hood 8c in which holds the tubular housing 8 in the manner of a telescope and is displaceable against the force of at least one spring element 40 or 41 in the direction of the bottom of the pressure hood 8c. According to the embodiment according to FIGS. 4, 5 and 6, the bottom of the pressure hood 8c is formed by a metal plate 10 with holding magnets 11 embedded therein. Furthermore, these three further embodiments differ from the embodiment according to FIGS. 4 and 5 by somewhat differently designed mountings 13a and 13b and 13c for the adhesive tape winding device KW, which all have a further spring element 40a and 41a. This further spring element is so effective that the adhesive tape winding device KW can only be transferred via the guided holder 13a or 13b or 13c against its spring force from its lower receiving sliding position to its upper stripping sliding position. The transport of the adhesive tape KB also takes place here in accordance with the embodiments according to FIGS. 4 and 5 when the adhesive tape winding device KW is shifted from its lower receiving-sliding position into its upper stripping-sliding position by engagement of a driver 20 fastened to the tubular housing 8 in the Adhesive tape reel 18 rigidly connected gear 19.

In the exemplary embodiment according to FIG. 9, the sliding movement of the adhesive tape winding device is made possible by means of two gears 42 and 43 which are firmly connected to one another and which are rotatably mounted in a pin 44 above the guided holder 13a and are designed in the manner of a locking mechanism. A gear rack 45 attached to the bottom of the pressure hood engages in the gear wheel 42 from the left, while a gear rack 46 attached to the guided holder 13 a engages in the gear gear 43 from the right. In the case of the toothed wheel 44, the ring gear is incomplete in such a way that teeth are present in successive 90 ° sectors and once there are no teeth. This 90 ° sector division is only determined by the 90 ° rotation angle that the two gearwheels make towards the end of a lowering movement of the lifting device.

In the exemplary embodiment according to FIG. 9, the adhesive tape winding device KW is in its lower receiving / sliding position in which a workpiece adhering to the adhesive tape KB in the region of the deflection rollers 14 is transported from a first depositing point A1a or A1b to the second depositing point A2 according to FIGS. 1 and 2 becomes. When the lifting device H1 or H2 is lowered, the tubular housing 8 is pushed into the pressure hood 8c when the adhesive tape pickup KA is placed on the second storage location A2 and the gearwheels 42 and 43 are rotated by 90 ° in the direction of the arrow indicated by the rack 45. In this case, since the guided holder 13a engages with the teeth of the gearwheel 44 via the toothed rack 46, the adhesive tape winding device KW is simultaneously displaced from its lower receiving sliding position into its upper stripping sliding position during this sliding movement of the tubular housing 8. The adhesive tape winding device KW now remains in this upper stripping-sliding position until the lifting device in turn performs a lowering movement over a first depositing point A1a or A1b. As soon as the housing 8 is supported with its end plate 81 on the workpiece stack in the magazine 31 or 32 and the tubular housing 8 in turn slides into the pressure hood 8c in the course of the further lowering of the lifting device, the rotation is now caused by the rack 45 of the two gears 42 and 43 the engagement of the rack 46 in the gear 44 is released and the adhesive tape winding device KW slides in its guided holder 13a under the pressure of the further spring element 40a from its upper stripping-sliding position into its lower position Take-slide position for holding another workpiece. At the end of the subsequent lowering movement of the lifting device above the second storage location A2, the rack 46 comes into engagement with the teeth of the gear wheel 44 again by a further rotation of the two gear wheels 42 and 44 and then again performs the desired displacement of the adhesive tape winding device KW at this point to their upper stripping-sliding position.

In the exemplary embodiment according to FIG. 10, the displacement of the adhesive tape winding device KW as a function of a lifting movement of the lifting device is brought about by means of a cable pull 47, which is adjusted in its rope length by means of a spreading device 49 controlled by a switching wheel 48 in the form of a rotating bracket in the sense of lifting the adhesive tape winding device KW can be shortened. In FIG. 10, the spreading device 49 is activated in the position of the switching wheel 48 shown there, and the resulting shortening of the cable pull 47 shifts the adhesive tape winding device KW into its upper stripping-sliding position. When the lifting device is lowered to a first storage location A1a or A1b according to FIG. 1, when the tubular housing 8 is pushed into the pressure hood 8c, the switching wheel 48 is advanced to the next switching position via a push rod 50 attached to the bottom of the pressure hood 8c, in which the spreading device 49 deactivated and the resulting extension of the cable 47 enables the tape winding device KW in its guided holder 13b under the force of the further spring element 41a to be transferred from its upper stripping sliding position to its lower receiving sliding position. During the next stroke of the pressure hood 8c in the course of a lowering movement of the lifting device to the second storage location A2 according to FIG. 1, the switching wheel 48 is switched on via the push rod 50 to reactivate the spreader device 49 and in this case the tape winding device KW in turn in the sense of the desired stripping upper stripping-sliding position transferred.

In the embodiment according to FIG. 11, finally, above the guided holder 13c for the adhesive tape winding device KW, a locking release device 52 controllable by a switching wheel 51 is provided, in which the switching wheel 51 in accordance with the embodiment according to FIG. 10 in turn by a push rod 50 during a stroke of the pressure hood 8c is advanced relative to the tubular housing 8 in the manner of a locking mechanism and, with every second stroke, makes a resilient locking finger, which is also fastened to the bottom of the pressure hood 8c, ineffective with respect to a counter-locking mechanism 54 on the top of the guided holder 13c for the adhesive tape winding device KW. In the position of the tape winding device KW shown in FIG. 11 in the upper stripping-sliding position, in which the detent between the detent finger 53 and the counter detent 54 is effective, during a stroke of the pressure hood 8c relative to the tubular housing 8 during a lowering movement of the Lifting device at the second storage location A2 according to FIGS. 1 and 2, the latching finger 53 latched into the counter-latch 54 and then the guided holder 13c with the adhesive tape winding device KW is raised in the course of an upward movement of the lifting device against the force of the further spring element 41a. During the next stroke of the pressure hood 8c relative to the tubular housing 8 during the next lowering movement of the lifting device at a first storage location A1a or A1b, the indexing finger 53 is made from the counter-latch 54 by switching the switching wheel 51, as shown in broken lines unlatched so that the guided holder 13c with the adhesive tape winding device KW is again lowered into its lower receiving / sliding position under the force of the further spring element 41a.

As extensive studies on which the invention is based have shown that a PVC tape with a thickness of 0.05 mm, a width of 12 mm, a density of 1.38 / sq. Cm and an adhesive property is suitable as the adhesive tape KB for the adhesive tape winding device KW from 225 pond to 25 mm long at this width. It turns out that such an adhesive tape can also be accommodated in the adhesive tape winding device KW in a length of 30 m, taking into account the relatively small dimensions of the adhesive tape receiver KA.

As has already been pointed out, the proper functioning of lifting devices equipped with pickups depends to a large extent on the fact that the flat workpieces stacked in magazines at the storage locations in the form of fabric parts, fixing parts and other textile structures can be separated without difficulty, i. H. can be easily removed from such a stack. FIG. 12 shows in section such a magazine 31, 32 which enables perfect separation, which here consists of brush elements 56 with bristles facing the workpiece stack 30, which are preferably oriented obliquely downwards at an angle of approximately 20 °. In order to easily adapt the brush elements 56 to the outer contour of such a stack of workpieces, they have holding magnets 57 on the foot side, with the aid of which they can be fixed at any point on the magazine base, which consists, for example, of a steel plate 58. As practice has shown, the brush magazines 56 expediently have pig bristles with a length of 20 mm and a thickness of 0.10 to 0.20 mm, since they have highly flexible properties.

FIG. 13 shows a magazine 31/32 designed in this way for a workpiece stack 30 made of jacket front parts. The brush elements with the foot-side adhesive elements 57 can be adapted to the outer contour of the Jacket front part consist of both straight brush elements 56, slightly curved brush elements 56 'and strongly curved brush elements 56 ".

FIG. 14 shows a corresponding magazine 31, 32 for a stack of workpieces 30 made of collar parts, in which four slightly curved brush elements 56 'are used.

The holding magnets 57 for the brush elements 56, 56 ', 56 "and for fixing the adhesive tape receivers KA to the pressure plate DP of a lifting device H1, H2 preferably consist of permanent holding magnets with an excessive adhesive force, such as cobalt or ceramic magnets. Appropriate The width of the magnets is 10 to 12 mm and the length is 46 to 50 mm, with a thickness of 3 to 10 mm. The adhesive force should be in the range between 18 and 26 kilopond. Instead of the holding magnets 11 embedded in the metal plate 10 according to FIGS FIGS. 4 to 6 and 9 to 11, the adhesive tape receivers can also have an entire magnetic plate in the dimensions L × W × H = 50 × 50 × 5 mm on their upper side, which is screwed to a metal base.

Claims (12)

1. A device for picking up, transporting and accurately depositing laminar workpieces, in particular pieces of cloth, from at least one first location to a second location, consisting of a moving or rotary platform which bridges the depositing locations and is equipped with at least one lifting device and wherein the lifting device comprises receivers, which operate by adhesion, in the form of an adhesive tape receiving arrangement, wherein furthermore the adhesive tape receiving arrangement consists of an adhesive tape winding device which is longitudinally displaceable in a guided holder and has tape guide rollers which are arranged on the sides of the frame base and act as adhesive rollers, and by means of suitable openings the frame base is adapted for penetration by the adhesive tape in the region of the tape guide rollers in the receiving position of the adhesive tape winding device to form a stripping sheet, and wherein the upward and downward control of the position of the adhesive tape winding device within the holder is dependant upon the movement of the lifting device, taking into consideration the step-wise transportation of the adhesive tape, in such a manner than when lowering the lifting device at a first location the adhesive tape winding device seizes a workpiece which is to be transported by means of the adhesive tape in the region of its tape guide rollers, holds it during transportation in the raised state of the lifting device and following the lowering of the lifting device releases it at the second location, characterised in that the lifting device (H1, H2) is a pressure plate (DP) which can be moved vertically upwardly and downwardly by a drive, and that the adhesive tape receiving arrangement is divided into a plurality of adhesive tape receivers (KA) which represent independent functional units and have a tubular housing (8) and which can be fixed on the underside of the pressure plate by means of fastening means, preferably contact magnets (11) in practically any arrangement with vertical alignment.

2. A device as claimed in Claim 1 for the automatic deposition of laminar workpieces, which are to be fixed to one another, on the input side of the press which is formed by the inlet to the fixing press, characterised in that the inlet constitutes said second location (A2), a respective first location (A1a, A1b) is preferably arranged on eit*r side of the second location in the form of a magazine (31, 32) which stacks the workpieces to be processed, and that the moving platform (1) bridges the three depositing locations and possesses two lifting devices (H1, H2) on a slide (4) which can be moved along the platform, which lifting devices are spaced in the direction of travel of the slide by the distance of the second location from a first location and are synchronously controlled in their sequence of movement.

3. A device as claimed in Claim 1 or 2, characterised in that the first locations (A1a, A1b) are magazines (31, 32) which receive the stacks of workpieces (30) and are accessible from the top and whose lateral borders are formed by brush elements (56, 56', 56") having inwardly and somewhat downwardly directed bristles, and that in order to match the outer contour of a stack of workpieces said brush elements can be fixed on a base plate, which consists of a ferrous metal, for example a steel plate (58) at a freely selectable point by means of contact magnets (57) which are secured to the brush elements.

4. A device as claimed in Claim 3, characterised in that the bristles of the brush elements (56, 56', 56"), which have a high flexibility, have a length of approx. 20 mm and a downwards inclination of about 20°.

5. A device as claimed in Claim 3 or 4, characterised in that the bristles of the brush elements (56, 56', 56") are pigs' bristles having a bristle thickness of 0.10 to 0.20 mm.

6. A device as claimed in one of the preceding Claims, characterised in that above the tape guide rollers (14) the adhesive tape winding device (KW) includes two vertically spaced pins (15, 16) for the rotary mounting of two tape coils (17, 18) which serve to wind the adhesive tape (KB) across the tape guide rollers (14, 14a), and that the tape coil (18) which is provided for taking up the adhesive tape is rigidly fixed to a toothed wheel (19) which, when the adhesive tape winding device moves in a predetermined displacement direction in the tubular housing (8), engages with a pawl (20), which is arranged on the tubular housing in the form of a ratchet or a toothed rack.

7. A device as claimed in one of the preceding Claims, characterised in that the adhesive winding device (KW) is designed as an exchangeable unit (E) which can be positioned onto a guided holder (13) and for this purpose the inside of the tubular housing (8) is made accessible by a suitably dimensioned removable cover (8a).

8. A device as claimed in one of the preceding Claims, characterised in that the guided holder (13) of the adhesive tape winding device (KW) is connected to the piston rod of a small compressed-air cylinder (9), which is accommodated on the side of the pressure plate (DP) in the tubular housing (8), that furthermore the compressed-air cylinder is connected to a compressed-air distributor, which is arranged on the pressure plate, by means of electrically controllable air valves and air tubes, and that the control of the compressed-air cylinder is effected in the required conformity with the sequence of movement of the lifting device (H1, H2).

9. A device as claimed in Claim 8, characterised in that the compressed-air distributor is a distributor strip (VL) which extends over the width and/or length of the pressure plate (DP) at the edge and has a plurality of rapid-contact locks (73) for the air tubes to be connected.

10. A device as claimed in one of Claims 1 to 7, characterised in that on the side of the pressure plate (DP) the adhesive tape receiver (KA) is sealed by means of a pressure cap (8c), wherein the tubular housing (8) is telescopically received and displaceable against the force of at least one spring element (40) in the direction of the pressure plate, that furthermore the guided holder (13a) of the adhesive tape winding device (KW) can be transferred from its lower receiving position into its upper stripping position against the force of at least one further spring element (40a), that furthermore adjacent the pressure cap (8c) a gear wheel arrangement (42, 43) is rotatably mounted in the tubular housing (8), which arrangement (42, 43) is rotatably mounted in the tubular housing (8), which arrangement (42, 43) during each movement of the tubular housing towards the pressure plate engages with a first rack (45), which is secured in the pressure cap, and only during every second of such movements of the tubular housing engages with a second rack (46), which is secured to the guided holder of the adhesive tape winding device, in such a manner that during an upward movement of the tubular housing when both racks are engaged the adhesive tape winding device is raised from its lower receiving position into its upper stripping position and during the next upward movement when only the first rack is engaged the adhesive tape winding device is re-lowered into its lower receiving position under the effect of the force of the further spring element.

11. A device as claimed in one of Claims 1 to 7, characterised in that on the side of the pressure plate (DP) the adhesive tape receiver (KA) is sealed by means of a pressure cap (8c), wherein the tubular housing (8) is telescopically secured therein to be displaceable in the direction of the pressure plate against the force of at least one spring element (41), that furthermore the guided holder (13b) of the adhesive tape winding device (KW) can be transferred from its lower receiving position to its upper stripping position against the force of at least one further spring element (41a), that furthermore the guided holder of the adhesive tape winding device is connected to a cable (47), which is arranged in the tubular housing, adjacent the pressure plate and by means of which the adhesive tape winding device can be raised from its lower receiving position into its upper stripping position by shortening the vertical length of the cable by means of an expanding device (49) which is controllable by means of a toothed control wheel (48), and that during each upward movement of the tubular housing in the direction of the pressure plate the control wheel is advanced by means of a push rod (50), which is secured in the pressure cap, in such a manner that the expanding device is alternately activated and deactivated.

12. A device as claimed in one of Claims 1 to 7, characterised in that adjacent the pressure plate (DP) the adhesive tape receiver (KA) is sealed by means of a pressure cap (8c), wherein the tubular housing (8) is telescopically secured and displaceable in the direction of the pressure plate against the force of at least one spring element (41), that furthermore in the tubular housing on the side of the pressure cap is arranged a releasable retaining device (52) which is controllable by means of a toothed wheel (51) and which co-operates with a resilient retaining finger (53) secured in the pressure cap, that furthermore the guided holder (13c) of the adhesive tape winding device has a detent (54) for the retaining finger on the top, into which detent the retaining finger engages during an upward movement of the tubular housing in the direction of the pressure plate in the deactivated state of the stop release device and during the following motion of the tubular housing in the opposite direction it transfers the adhesive tape winding device (KW) from its lower receiving position into its upper stripping position against the force of at least one further spring element (41 a) and retains it there until the activation of the stop release device, and that the toothed wheel is advanced by means of a push rod (50) secured in the pressure cap during each upward movement of the tubular housing in the direction of the pressure plate and alternately activates and deactivates the releasable retaining device.

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