EP0481323B1 - Method for feeding a production machine with a precision centering and apparatus therefor - Google Patents

Method for feeding a production machine with a precision centering and apparatus therefor Download PDF

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Publication number
EP0481323B1
EP0481323B1 EP91117076A EP91117076A EP0481323B1 EP 0481323 B1 EP0481323 B1 EP 0481323B1 EP 91117076 A EP91117076 A EP 91117076A EP 91117076 A EP91117076 A EP 91117076A EP 0481323 B1 EP0481323 B1 EP 0481323B1
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EP
European Patent Office
Prior art keywords
strip
centring
turntable
coil
lifting
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP91117076A
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German (de)
French (fr)
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EP0481323A1 (en
Inventor
Ingomar J. K. Summerauer
Thomas Hartwig
Georg Laager
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Bruderer AG
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Bruderer AG
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Filing date
Publication date
Priority to CH328690 priority Critical
Priority to CH3286/90 priority
Application filed by Bruderer AG filed Critical Bruderer AG
Publication of EP0481323A1 publication Critical patent/EP0481323A1/en
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Publication of EP0481323B1 publication Critical patent/EP0481323B1/en
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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D43/00Feeding, positioning or storing devices combined with, or arranged in, or specially adapted for use in connection with, apparatus for working or processing sheet metal, metal tubes or metal profiles; Associations therewith of cutting devices
    • B21D43/02Advancing work in relation to the stroke of the die or tool
    • B21D43/021Control or correction devices in association with moving strips
    • B21D43/023Centering devices, e.g. edge guiding

Description

  • The invention relates to a method according to the preamble of claim 1 and to a device according to the preamble of claim 4.
  • Such a method and such a device have become known from EP-A-0 267 357. The coil is placed with a vertical axis on a rotatable support or a turntable, then the strip start is pulled off, then the strip is rotated by 90 ° so that it comes to lie in an approximately horizontal plane, and finally on an axis predetermined by the processing machine centered.
  • The procedures according to FR-A-2 340 149 were similar, but by hand, in which a hand-operated rotating device with a subsequent, driven pair of rollers formed the pulling and rotating device, but deliberately from an uncentered one for reasons of the chosen arrangement The position of the coil was assumed because a certain angle to the plane of the coil was considered appropriate.
  • Although this method and its associated device have generally proven themselves well in practice, internal stresses sometimes occur in the workpieces produced in the processing machine, which can have an unpleasant effect on delicate products. Naturally, the origin of such internal tensions is difficult to determine, since they can already be introduced during the production of the strip-like material, generally sheet metal strips, or also during the winding of the coil, etc. Therefore, the processing machine is generally preceded by a so-called straightening machine which is deformed of the belt between interlocking rollers compensates for such tensions. Another, sometimes occurring, phenomenon existed in one-sided wear of belt guides arranged after the centering section.
  • These shortcomings were not hidden from the experts in the past either, as the introduction to DE-B-1 296 475 in particular shows. The solution according to this document also only resulted in rough centering, because only the position of a single edge of the tape was taken into account. In general, however, coils with different strip widths are processed, so that the central axis of the strip - if the position of only one edge of the strip is determined - will deviate depending on the strip width from a desired position and corresponding to the machine axis. For this reason, the long-known disadvantages could not be eliminated by this construction.
  • In a first step, the invention is based on the knowledge that at least some of the phenomena described above may be due to the centering, and this results in the task of creating an improved centering method, making the system cheaper and enabling a shorter overall length. This is achieved in a surprisingly simple manner by the method features of independent claim 1 and the device features of independent claim 4.
  • While in the known method the coil-side end of the band-shaped material is determined by the position of the coil and possibly by clamping surfaces engaging on the band and therefore hindering good centering, this effect is prevented by the measure according to the invention. Advantageous embodiments of the invention are described in dependent claims 2, 3, and 5-18.
    A reliable actuation of a band clamping device on a coil in an unwinding station can be achieved by a device according to the dependent claims 14 and 16, respectively.
  • Further details of the invention emerge from the following description of exemplary embodiments described with reference to the drawing. Show it:
  • Fig. 1
    A system according to the invention for loading with a straightening machine;
    Fig. 2
    a punching machine with a loading device according to the invention without a straightening machine;
    Fig. 3
    an enlarged view of a detail from Fig.1 to illustrate a lifting platform, which in
    Fig. 4
    is shown in plan view in two different planes along the line IV-IV of Figure 3;
    Fig. 5
    a centering device according to the invention; and
    Fig. 6
    a device carrier for receiving the tape centering unit according to the invention, and optionally take-off rollers and possibly also scissors, all in modular construction, in horizontal section, for which purpose FIGS. 6A, 6B show an enlarged view of an actuating device for a tape clamp in two positions along the line A, B - A, B illustrates;
    Fig. 7 and 8
    each a variant of the lifting device for the coils, in an oblique view; and
    Fig. 9
    a preferred embodiment of the unwinding station in an axonometric view.
  • 1, a straightening machine 22 is supplied with strip-like material 4. This band-shaped material 4 is unwound from a coil 2 at a roll-off station 1 at the right end of FIG. The strip-shaped material 4, which, as can be seen, lies in a vertical plane from the coil 2, since the coil is unwound with a vertical axis of rotation 5, passes through a strip transport and twisting device 20, which in itself is similar to that of FIG EP-A-0 267 357 could be formed. Before this, the band-shaped material 4 is aligned on centering rollers 6, at the center of feed rollers 21, which - in the direction of movement of the belt 4 - are connected downstream of a pair of take-off rollers 9 which may pull off directly from the coil 2. The take-off rollers 9 (due to the vertical belt level) vertically directed axes, whereas the axes of the feed rollers 21, after being rotated by the belt transport and twisting device 20 connected to the take-off mechanism, lie horizontally by 90 °.
  • The feed rollers 21 and possibly a vertical (not shown) pair of centering rollers - here for centering the belt 4 in the horizontal plane - are expediently accommodated in a side stand 54 designed in a modular design. These centering rollers are designed analogously to those according to FIG. 5, but of course they are rotated by 90 °.
  • The strip-shaped material 4 can then, if necessary, pass through a straightening machine 22, which has the strip to and fro rolls 50, 51, and a loop section (not shown) before entering a processing machine 18, for example a welding machine, here a high-frequency stamping press (which is characterized by the arrangement of compensating masses for the fast punching movement and is accommodated in a soundproof housing 19), which loop section can be replaced by the combined loop and twist section 24 if the straightening machine 22 is omitted. Each of these loop sections is expediently provided with a light barrier 28 for regulating the loop size. Furthermore, each loop section is assigned a corresponding loop guide 25, which generally consists of a series of rollers.
  • The coil 2 is arranged on a lifting platform with a supporting platform 3. Instead of the lifting platform 3, another form of a vertically displaceable carriage can also be provided. A single coil 2, preferably in a cassette known per se, not shown, for example in accordance with WO-A-90/09945, which is hereby disclosed as disclosed and which is taken from a coil store, can be located on the turntable 7 arranged on the lifting platform 3; but it can also be provided a conventional pallet reel with several coils arranged one above the other For example, belong to the execution of a single order and are therefore processed one after the other. For correct centering at the height of the take-off rollers 9, an edge sensor 26 is provided, particularly in this case, expediently for the upper edge of the coil 2. Of course, this does not take into account the width of the band-shaped material on the coil 2, so that this is practically only a rough centering, as is sufficient for pallet reels and has been proposed, for example, with a photoelectric converter in DE-B-1,296,475.
  • After all, this coarse centering already allows you to get by with minimal handling when changing from one coil to another, yes, that this change can even take place automatically. It is only necessary for this that the lift is designed for such a large load and its drive is controlled by the sensor 26. The lifting platform 3 carries a turntable 7, via which the respective coil 2 can be driven in the unwinding direction, and optionally also in the winding direction. Lifting device and unwinding drive form an unwinding station 1 which can be designed in its upper section as a magazine for further coils 15.
  • The unwinding station has at least two, preferably three to four stands 12 which have latching holes 12a at regular intervals, for example in two adjacent vertical rows, as can be found in furniture construction. Holding devices 12b can be hung in these latching openings, which support the horizontal cassettes 87 (FIG. 3; see also EP-A-0267357) or documents 72 (FIG. 1.3) of the coils 15 (FIG. 1). As shown in FIG. 1, when applied to the storage of coils, this has the advantage that in the case of coils which are wider than the hole division of the holes 12a, the division of the holding elements 12b need not be changed because - as with the higher coils 15 (with a wider band material) can be seen in FIG. 1 - the coil is narrower in diameter than its base (this has already been described in EP-A-0 267 357) and therefore is able to penetrate between the holding elements 12b. In a magazine file, this middle coil 15 then occupies two positions one above the other. This arrangement is of course also advantageous regardless of the centering device described above.
  • The aforementioned use of stands 12 with a division of notches 12a (which may also be designed differently) may also be used to modify and expand an unwinding station. If it is desired to replace a conventional unwinding station, as shown in EP-A-0 267 357 mentioned above, with one with a lifting device, this could also be hung directly into the stand 12 without the need for a separate frame .
  • It goes without saying that the lifting device can be designed differently, for example may also have fluid cylinder units. It is essential, however, that it can be raised in more than just two positions. For example, it would be conceivable to attach three or more hydraulic cylinders to the bottom of the unwinding station 1, which act in the peripheral region or in the region of the edge of the platform 3. This in turn has the advantage that it counteracts tilting during the vertical movement and thus also ensures that the platform 3 is in a perfect, horizontal position (which can also be formed merely by a rust-like frame) during unwinding. This prevents the searched, centered position from being disturbed by tilting the platform.
  • However, in order to enable a greater compactness of the construction and an easy assembly on the hole stands 12, it is advantageous if the lifting device works with elongated tension members, such as cables or (preferably) chains 73, and thus with the aid of an anchoring beam 74 on the holes 12a, or, according to FIG. 3, can be better fixed to the blocks 13 firmly connected to the stands 12 or their connecting walls (not shown).
  • Furthermore, it is advantageous if at least one drive motor 8 or 76 is arranged on the platform 3 itself. Of this, the motor 8 is provided for driving the turntable 7, while a drive shaft of the lifting device can be driven by the motor 76 via a gear 77 (FIG. 3), so that no further installations are required for the installation of such a lifting device. The gear 77 is expediently designed to be self-locking, for example in the form of a worm gear. An output cable of the edge sensor 26 is connected to the motor 76 and its lifting control, not shown, which is designed similarly to a lift control and, as is known per se in lift controls, can be designed as a mechanical sensor with a roller at the end of a lever in order to actuate a switch .
  • Because of the already mentioned importance of a tilt-free alignment, it is also advantageous if guide rollers 80 engaging on the platform 3 in the peripheral region of the rotary plate 7 are arranged (only two of them are shown in FIG. 4). For easier replacement, it is also advantageous if sliding guides, here in the form of rails 81, are connected to the lifting device, since then the platform 3 carrying the essential elements only needs to be inserted.
  • With regard to the sliding guides 81, it is clear that these are designed to be as low-friction as possible, given the high weight resting on them. Roller guides, such as those used for drawer guides, are conceivable, but it is easier and more stable if they are provided with a sliding coating, in particular made of plastic.
  • As far as the chains 73 are concerned, it is expedient to arrange them in the manner of a pulley block, for which purpose two chain wheels 83 are fastened to a drive shaft 82 (FIG. 3, 7), which cooperate with deflection wheels 84 on an axis parallel to the shaft 82 . 3 further deflection wheels 85, 86 are arranged above it.
  • In order to be able to process, instead of mere coils, those in cassettes (which are indicated by dash-dotted lines in FIG. 3 at 87), which are provided with through-openings for driving the coil, it is advantageous to use a drive adapter that is practically only a carrier (72) for the roller packs 88 shown in FIGS. 3 and 4, of which the right one in section and the left one in side view in FIG. 3 is shown. Each of these rollers adapts to the respective speed of the turntable 7 and transfers it smoothly to the overlying coil support (not shown) with the coil 2 or 15 lying thereon, without this necessitating a special design of the turntable for bevel gears oblique conical surfaces required.
  • A gearbox 89 is also assigned to the rotary drive motor 8, above which a rotary plate 90 with driver pins 71 for the rotary plate 7 is arranged. Since, as mentioned, the band-shaped material 4 is pulled off from the coil by means of the take-off rollers 9, the rotary drive 8 is not absolutely necessary for the coil; rather, the tape 4 can only be pulled off the rollers 9, similar to the capstan drive of a tape recorder. However, it is preferred to proceed as described in the simultaneously filed application EP-A-481324 "Method for controlling the loading of a processing machine with strip material and device therefor" by the same applicant, which is hereby deemed to be disclosed.
  • According to the invention, the strip 4 which has now been pulled off the coil 2 in a vertical plane is centered before being rotated into the horizontal position, as shown in FIG. 5. A frame 92 is provided therein, on which two guide columns 93 are expediently fastened in a vertical position. As can still be seen, the device shown in FIG. 5 is practically a measuring device which adjusts the height of the Platform 3 adjusts so that the band-shaped material 4 is unwound onto a central plane M and in this position.
  • As such, it would be conceivable to mount a number of sensors in a row running perpendicular to the central plane M, for example inductive, capacitive or, as preferred, photoelectric converters. In the former case, an increased signal (or none at all) would result at the output of those sensors in the area of which the band actually lies, so that the actual width of the band 4 can be calculated from the number of responsive sensors leaves. The same effect could be achieved with a single sensor moved perpendicular to the central plane M.
  • However, the preferred embodiment according to FIG. 5 looks different. Here, opposing centering surfaces, preferably in the form of centering rollers 6, can be moved towards one another with the aid of the drive 16 until they meet an edge of the belt 4 and give a corresponding signal to the lifting motor 76, which thus moves the platform 3 into that of the centered one Position raises the appropriate height until the other centering surface also abuts the opposite edge of the belt.
  • The drive for the centering rollers 6 can be of any design, for example also fluid. However, it is preferred to use a worm 97 driven by a motor 16, which has a left-hand thread on the one hand and a right-hand thread on the other hand approximately up to the central plane M. In this way, it is ensured without complicated synchronization devices that both rollers 6 can move towards one another by the same amount and at the same speed.
  • With the two threaded sections of the worm 97, two movable supports 98 work together, which have at their right end (with reference to FIG. 5) a corresponding internal thread 97 ′ engaging in the worm 97 and are guided in their movement by the guide columns 93. Each of these carriers 98 carries an axis 95 on which the centering roller 6 is rotatably mounted and thereby does not hinder a longitudinal movement of the belt 4 as soon as it rests on the roller. The worm 97 plays the role of a synchronizing device for the movement of the two carriers 98, and it is understandable from this that it can be replaced by any other synchronizing device, for example if each carrier 98 is assigned its own cylinder drive or motor.
  • A sensor traveling on the carrier 98 is connected to each of these centering rollers 6, which sensor is designed here - together with a reflector - as a light barrier 28a. Therefore, if the respective carrier 98 moves towards the edge of a belt 4 to be centered, the light barrier is interrupted at the moment when the roller 6 reaches the associated belt edge. Certainly, the reaching of the band edge could also be determined by measuring a current on motor 16 which may increase thereupon, but this could lead to undesirable voltages in band 4, which is why the arrangement shown is more advantageous.
  • Even if only one of the light barriers is interrupted, the motor 16 and the worm 97 continue to move. The centering roller 6, which has first arrived at a belt edge, thus pushes the belt against the central plane M in front of it. However, these outputs are connected to an EXCLUSIVE-OR gate 99 which only emits a signal when only one of the sensors is still providing a signal, ie the one that has not yet reached its associated band edge. The output signal of the EXCLUSIVE-OR gate triggers a control stage 91 for the motor 76 of the lifting device, so that the motor 76 begins to rotate when one of the centering rollers 6 reaches the edge. Its rotational speed or that of the downstream transmission is set such that the lifting device expediently also moves in synchronism with the displacement of the belt 4 against the central plane M.
  • It goes without saying that reaching an edge by means of a centering roller 6 means that the associated coil 2 lies in a corresponding plane and must therefore be shifted accordingly by actuating the lifting device. Only when the second centering roller 6 has reached its associated edge does its light barrier signal also fail to appear. Accordingly, a logic element 94 with AND function reports (in the case of an inductive or capacitive sensor an AND gate, in the case of a photoelectric or pneumatic sensor, as here, a NAND gate) to the control circuit 91 of the motor 76 and to a control circuit 96 for the motor 16 that the centering process has ended and causes both motors to be switched off. This also achieves fine centering, which theoretically can also be achieved without the coarse centering by means of the mechanical sensor 26, in particular if the lifting device cannot be displaced over several coil widths, i.e. should only be suitable for holding a single coil. Conversely, in some cases the rough centering described using sensor 26 may be sufficient. In any case, it is important that the belt 4 is freely movable in the area of the centering rollers 6, because otherwise it could only be brought into the central position temporarily.
  • Before entering the processing machine 18, as mentioned, a loop section must be provided, which is preferably designed as a combined loop and twist section 24 - as shown in FIG. 2 - with the loop guides 25. These have an inlet roller basket 48 and an outlet roller basket 48 '. The loop section also has the loop sensor 28 already described with reference to FIG. 2 for the size of the loop. Because the loop section 24, in which the band 4 lies loosely, is connected downstream of the centering device, the free height mobility of this band section is ensured for centering without loss of space or special precautions.
  • Deviating from the conventional, however, lifting drives are provided for at least one of the loop guides 25 or at least one of the roller baskets 48, 48 ′, here expediently in the form of fluidic cylinder units, such as pneumatic cylinders 35, around at least one of the roller baskets 48, 48 ′, in particular both to bring the centering position to be aligned to the center plane M, which is given by the dimensions of the processing machine 18.
  • It is clear from what has been said that it is advantageous to control the two cylinders 35 together with the other parts of the centering device. For this purpose, the circuit according to FIG. 5 has a flip-flop 100 with its inputs at the outputs of the two logic elements 99, 94 or an analog flip-flop whose output Q is connected to a control stage 38 for the two cylinders 35 is.
  • If the EXCLUSIVE-OR gate 99 gives the switch-on signal, the output Q is switched, i.e. the control stage 38 having a switching valve receives a signal which causes this switching valve to open, whereupon air is supplied to the underside of the cylinders 35. This function presupposes that the sensor 26 is set in such a way that the platform 3 normally remains somewhat below its target position corresponding to the central plane M. Otherwise, the circuit shown must practically be doubled in the sense that corresponding control elements are also available for lowering the lifting device or the roller baskets. It goes without saying that the motor 76 must have reversible rotary devices.
  • However, as soon as the NAND gate 94 gives the "end" signal, the flip-flop 100 is switched to its output Q, i.e. the output Q switches off and the cylinders 35 remain in their respective positions.
  • Numerous modifications are conceivable within the scope of the invention; for example, the use of the stand 12 with its catch system, as explained, advantageous even without a centering device. It goes without saying that the sensor 26 can optionally be replaced by other sensors, such as a television camera to which an edge detection circuit is connected, as has become known for a wide variety of purposes, in particular in the form of contrast detection circuits. In this latter case, fine centering could also be carried out with the aid of the lifting device if the center plane M is calculated from the determination of the edges (which can also be done in a different way than with a television camera).
  • Regardless of where the fine centering takes place, it should be noted that the special design of the lifting device 3, 73, 74, 76, 77, in particular with its support on the circumference of the lifting platform 3, ensures a much more even handling and also saves space, when this was possible with known lifting devices with a central reciprocating piston, because there was always the risk of canting or slight skewing. In the case of several spindles, a complex synchronization device would be required, which can be dispensed with in the preferred embodiment according to the invention with positively synchronized chains.
  • It follows from the above explanations that a whole series of devices 6, 9, 14 are provided at the exit of the unwinding station 1, where they should be accessible, but possibly also tape cassette devices. Therefore, in order to improve accessibility and to enable a modular construction of individual units which can be detachably connected to one another, it is preferred if the pair of take-off rollers 9 (FIG. 1, 2) and / or a belt centering unit 6, 16, 28a (FIG. 5) is releasably attached to stands 12 from the operating position shown in FIG. In the present case, this takes place in that the carrier 23 can be pivoted out on a hinge 17, so that on the one hand this gives access to the belt and the devices assigned to it and on the other hand also to the units mounted on the carrier 23, which advantageously also include Scissors 14 heard, is facilitated. In addition, a conventional unwinding station can be converted cheaply into one according to the invention, since all devices can be preassembled on the carrier 23, which also reduces the delivery times.
  • Above all, this also gives access to an advantageously provided band clamping device c on a frame spanning the coil (not shown in FIG. 6) together with the rotatable carrier (cf. application WO-A-90/09945) f with a stationary clamping jaw c1 and guaranteed a movable jaw c2. Likewise, a clamping actuation device a assigned to this band-clamping device fastened on the frame side is accessible, which is shown in more detail in FIGS. 6A, 6B in two positions.
  • The strap clamping device according to these figures differs from that described in WO-A-90/09945 primarily by an extension p of one of the levers of the toggle lever system used. This extension p serves as an actuation approach. However, since the frame f is now pushed into a drawer dr in its plane, but is actuated on the side of the unwinding station by a clamp actuating device a mounted there, care must be taken to ensure that these two devices are correctly coupled to one another.
  • This can be done in various ways per se, for example, by detecting the actuation approach p of funnel-shaped converging surfaces at the top and bottom and bringing it into the desired position by moving these surfaces. A much more space-saving design is, however, that the clamping actuating device a has two claws C11, C12, which are at a distance from one another to form a coupling opening o, the spacing of which from one another is dimensioned in accordance with FIG. 6A such that it not only corresponds to the width of the actuating projection p , but also a tolerance of at least 20%, preferably at least 25%. If the claws C11, C12 and / or the attachment p then have a corresponding width in the direction of insertion (cf. double arrow 52 in FIG. 6), so that in the operating position of the frame f there is a secure overlap (in FIG. 6 this is ensured by a corresponding width of the extension p), a perfect function is guaranteed under all circumstances.
  • As can be seen particularly from FIG. 6B, the claw part can be pivoted about a stationary axis x and is recognizable by the piston rod r of a piston-cylinder unit pc that can be pivoted about an axis x1 with fluid connections hc shown in FIG. 6B from the one shown in FIG. 6A Clamped position (= the insertion position of the frame f) brought into the open position shown in FIG. 6B, in which the band 4 is exposed between the jaws c1, c2. It can be seen from FIG. 6A that the claws C11, C12 assume a closed position, shown in broken lines, when reclamping, which is slightly offset from the rest position shown in full lines for the engagement of the two parts p and C11, C12 and o, respectively to bring the actuation projection p securely into its clamped position according to FIG. 6A, on the other hand to assume it in the rest position, in which the projection p can be pushed approximately centrally into the opening o.
  • In FIG. 7 it can be seen that the chain 73 has four different parts 73/1 to 73/4, the parts 73/1 and 73/3 on the one hand and the parts 73/2 and 73/4 on the other in each case in an analogous manner are led. Each chain part 73/1 to 73/4 is fastened at one end to a fixed point P above the lifting platform 3 on the stand 12 (FIG. 1). The other end of the chain parts 73/1 to 73/4 is attached to the floor, below the lifting platform 3 at a point P '. In between, the chain parts 73/1 and 73/3 (starting from the upper point P) pass through the sprocket 83 and a deflection wheel 84 'which is fastened coaxially with the sprocket 84 on its shaft. The chain parts 73/2 and 73/4, on the other hand, first run over the sprocket 84, starting from the upper point P, in order then to be guided over a deflection wheel 83 'arranged coaxially with the sprocket 83. It goes without saying that the good engagement of the chain links in the sprocket teeth must be ensured, because every chain part, taken alone, no stable position of the lift 3 ensures. The drive with the aid of the motor 76 via the drive shaft 82 takes place via the chain wheels 83, from where the movement is also transmitted to the chain wheels 84.
  • For this reason, another form of chain guide, as shown in FIG. 8, can also be used. There, too, four chain parts 123/1 to 123/4 are used, of which the chain parts with an even end digit and those with an odd end digit are guided in an analogous manner. One end of each of the chain parts 123/1 to 123/4 is attached to the floor point P ', the other directly to the lifting platform 3. In between, the chain parts 123/1 and 123/3, starting from the attachment point on the lifting platform 3, first run upwards and then down over the deflection wheel 85. Coaxially with the sprocket 83, a first deflection wheel 83 'is attached to the lifting platform 3, via which the chain parts 123/1 and 123/3 run in an almost horizontal direction to a further deflection wheel 84' arranged coaxially with the sprocket 84, and from there down to point P '.
  • The chain parts 123/2 and 123/4 run similarly, starting from their attachment point on the lifting platform 3, initially upwards to a stationary deflection wheel 86, from where they are again guided downwards to the chain wheel 84. After wrapping it around 90 °, the respective chain part 123/2 or 123/4 then runs approximately horizontally to the driving sprocket 83, and from there down to point P '.
  • This latter variant has the advantages of a block and tackle and is therefore preferred.
  • The problem of accessibility has been discussed above with reference to FIGS. 6-6B and the equipment rack 23. The problem is exacerbated by the fact that for reasons of avoiding an accident risk (especially at high unwind speeds of the heavy coils 2) it is desirable to protect the unwind station as much as possible from unauthorized access and access.
  • So far, the problem has been solved in such a way that protective grids have been set up all around in known pallet reels, which, with easy detachability, did not provide sufficient protection, but made it difficult to access the unwind station with difficult detachability.
  • According to FIG. 9, a satisfactory solution can now be found by placing the entire unwind station 101 in a closed housing ho formed by walls w, which can be closed, for example, by a protective-grid-like cover 61. The arrangement is preferably such that the take-off rollers 9 and / or the centering rollers 6, possibly together with the scissors 14, are attached to one side of the housing ho, expediently in the carrier 23 mentioned, whereas one by at least one on the opposite side Cover, like the two doors d shown here, is provided with a closable loading opening 30, whereby the handling is improved (compared to the loading shown in the previous figures at right angles to the take-off rollers 9). In addition, this design enables such unwinding stations 101 to be arranged next to one another in a row, possibly interrupted by side-mounted magazines, so that all unwinding stations 101 can be loaded from a common loading aisle, preferably via controlled handling devices, which simplifies the control of these devices. FIG. 9 shows the application of the unwinding station 101 for known pallet reels with several coils 2 one above the other, but due to the modular structure with easily releasably attachable units, it goes without saying that a conversion to cassette operation with the frame f mentioned is easily possible.

Claims (18)

  1. Process for loading a processing machine (18) with material (4) in strip form from a coil (2, 15), in which the coil (2, 15) is unwound with rotation with an approximately vertical unwinding axis (5) in an approximately horizontal position on a turntable (7), the plane of the strip initially being approximately vertical but then being turned in a turning step through about 90° about the longitudinal axis of the strip, and in which, upstream of the processing machine (18), the material (4) in strip form is oriented with its longitudinal axis in a horizontal position, the central plane (M), which is determined by the dimensions of the processing machine (18), characterized in that, before the turning step, a centring step is carried out in which the position of the two edges of the unwound material (4) in strip form is determined in order to determine the width of the material (4) in strip form, after which the material (4) in strip form is centred with respect to the central plane (M), for which purpose the coil (2, 15) is adjusted in height.
  2. Process according to Claim 1, characterized in that, before the centring step in which fine centring with respect to the central plane (M) is effected, the coil (2, 15) is coarsely precentred by determining the upper edge of the material (4) in strip form, for which purpose the coil (2, 15) is adjusted in height.
  3. Process according to Claim 1 or 2, characterized in that, upstream of the processing machine (18), the material (4) in strip form is turned in a combined loop and turning section (24) having loop guides (25) and forms a loop, and that at least one of the loop guides (25) is adjusted in height in order to orient the centred plane of the corresponding section of the material (4) in strip form with respect to the central plane (M).
  4. Apparatus for carrying out the process according to any of the preceding Claims, having an unwinding station (1), a strip centring means (6, 16, 28a, 91, 96) and a turning section in which a strip transport and turning means (20) for a material (4) in strip form is provided, characterized in that the strip centring means (6, 16, 28a, 91, 96) has an arrangement (6, 28a) which determines the position of at least one edge of the unwound material (4) in strip form and the width thereof, i.e. the position of both edges, and a control means (91, 96), the arrangement (6, 28a) delivering to the control means (91, 96) an appropriate signal by means of which the coil (2, 15) is adjustable in height on its turntable (7) by a lifting means (3, 73-77) so that the material (4) in strip form is centred with respect to a horizontal position, the central plane (M), determined by the dimensions of a processing machine (18).
  5. Apparatus according to Claim 4, characterized in that the arrangement (6, 28a) comprises at least one sensor (28a) which is optionally movable perpendicular to the longitudinal direction of the strip.
  6. Apparatus according to Claim 4 or 5, characterized in that the tape centring means (6, 16, 28a, 91, 96) has at least two centring rolls (6) which can be adjusted towards the mutually oppositely disposed edges of the unwound material (4) in strip form, and that, for automation of the centring process, at least one edge position indicator (26, 28a), for example a mechanical sensor (26) and/or a photoelectric transducer (28a), is associated with at least one edge of the material (4) in strip form, in particular at least the upper edge, and, when two edge position indicators are present, each of them is preferably connected to the centring roll (6) associated with it and is adjustable with said roll towards the edge.
  7. Apparatus according to any of Claims 4 to 6, characterized in that the strip centring means (6, 16, 28a, 91, 96) has at least two centring rolls (6) which can be adjusted towards the mutually oppositely disposed edges of the unwound material (4) in strip form, and that the two centring rolls (6) are connected to a synchronized drive (16, 97, 97') for synchronization of their movement, and that a drive motor (16) having a worm (97, 97') provided with threads of different pitch directions is expediently provided for this purpose.
  8. Apparatus according to any of Claims 4 to 7, characterized in that a centring means for centring the material (4) in strip form in the horizontal plane with respect to an axis determined by the dimensions of the processing machine is arranged downstream of the turning section, this centring means optionally being arranged on a side support (54) formed as a modular unit and preferably having vertically arranged centring rolls.
  9. Apparatus according to any of Claims 4 to 8, characterized in that the unwinding station (1) has a lifting means (3, 73, 74, 76, 77) with a lifting platform (3) for the turntable (7), which lifting platform is displaceable in respect of height and can be fixed in more than two different positions in respect of height and which is connected, at three or more points located in the region of its circumference, to a lifting means (73, 74, 76, 77) which expediently has an elongated traction means, in particular a chain (73), which can be driven by means of a self-locking drive, such as a worm drive, and/or which is designed and arranged in the manner of a block and tackle.
  10. Apparatus according to Claim 9, characterized in that at least one of the following features is provided:
    a) the lifting platform (3) carries at least one drive motor (76 or 8) for the lift drive and/or for the rotary drive of the turntable;
    b) guide rolls (80) engaging in the peripheral region of the turntable (7) are mounted on the lifting platform (3);
    c) a sliding guide (81) which in particular is a low-friction guide, for example covered with low-friction plastic, for insertion of the lifting platform (3), is connected to the lifting means (73, 74, 76, 77).
  11. Apparatus according to any of Claims 4 to 10, characterized in that at least two supports (12) with detents (12a) arranged at intervals, in particular with detent holes for insertion of holding elements (12b) for receiving cassettes (87) or supports carrying the coils (2, 15), are associated with the unwinding station (1), while the lifting means (3, 73, 74, 76, 77) can preferably be anchored to blocks (13) connected to the supports (12) or their connecting walls.
  12. Apparatus according to Claim 11, characterized in that a drive adapter is provided on the turntable (7), for transmitting the speed of the turntable (7) to the coil support, the drive adapter having groups (88) of rolls and a carrier (72).
  13. Apparatus according to any of Claims 4 to 12, characterized in that a combined loop and turning section (24) having loop guides (25) is arranged directly downstream of the tape centring means (6, 16, 28a), at least one of the loop guides (25) being adjustable in height for centring the plane of the corresponding section of the material (4) in strip form with respect to the central plane (M), and that the arrangement (6, 28a) of the tape centring means (6, 16, 28a, 91, 96) expediently delivers a signal to the height adjustment control (38) for achieving a height setting of the loop guide (25) analogous to the height adjustment of the turntable (7).
  14. Apparatus according to any of Claims 4 to 13, characterized in that an unwinding station (101) having the turntable (7) and the take-off rolls (9) is in the form of a closed housing, and that a loading orifice which can be covered by at least one housing closure element is arranged on the housing.
  15. Apparatus according to any of Claims 4 to 14, having a turntable (7) surrounded by a frame (f), on which frame (f) a tape clamping means (c) which can be housed in an unwinding station (1) driving the turntable (7) is provided, characterized in that a clamping actuator (a) having a coupling orifice (o) for receiving an actuating part (p) of the strip clamping means (c) on the frame when the frame (f) is housed in the unwinding station (1) is provided on the unwinding station (1).
  16. Apparatus according to Claim 15, characterized in that the clamping actuator (a) has two mutually oppositely disposed actuating claws (C11, C12) which form the coupling orifice (o) between them, and that preferably at least one of the following features is provided:
    a) the coupling orifice (o) which is defined by the actuating claws (C11, C12), for entry of the actuating part (p), corresponds to the size thereof plus a tolerance of at least 25%;
    b) the actuating claws (C11, C12) are located in a plane which is perpendicular to the direction of introduction of the, preferably insertable, frame (f) into the unwinding station (1).
  17. Apparatus according to any of Claims 4 to 16, characterized in that the tape centring means (6, 16, 28a) - optionally having a pair (9) of take-off rolls - in the direct vicinity of the turntable (7) - independently thereof - is arranged on a modular device support (23), forming a unit which can be released from its operating position and fixed in its operating position.
  18. Apparatus according to Claim 17, characterized in that shears (14) which optionally likewise form a separate, modular unit are additionally associated with the device support (23) or are detachably fastened thereto.
EP91117076A 1990-10-12 1991-10-08 Method for feeding a production machine with a precision centering and apparatus therefor Expired - Lifetime EP0481323B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CH328690 1990-10-12
CH3286/90 1990-10-12

Publications (2)

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EP0481323A1 EP0481323A1 (en) 1992-04-22
EP0481323B1 true EP0481323B1 (en) 1995-08-23

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EP91117076A Expired - Lifetime EP0481323B1 (en) 1990-10-12 1991-10-08 Method for feeding a production machine with a precision centering and apparatus therefor

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US (1) US5482225A (en)
EP (1) EP0481323B1 (en)
JP (1) JPH04258329A (en)
AT (1) AT126739T (en)
DE (1) DE59106301D1 (en)
ES (1) ES2033222T1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010016063A1 (en) * 2010-03-22 2011-09-22 Krones Ag Labeling machine for processing roll material and apparatus for receiving roll material

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6866213B2 (en) 2001-12-28 2005-03-15 Kimberely-Clark, Worldwide, Inc. Rolled web products having a web wound in an oscillating fashion
US6641080B2 (en) 2001-12-28 2003-11-04 Kimberly-Clark Worldwide, Inc. Method and apparatus for winding a web
US6802467B2 (en) 2001-12-31 2004-10-12 Kimberly-Clark Worldwide, Inc. Method for axial feeding of ribbon material and a stock of ribbon material coils for axial feeding
US6726142B2 (en) 2001-12-31 2004-04-27 Kimberly-Clark Worldwide, Inc. Twist controlling device, rotatable nip and axial feed system
US6702212B2 (en) 2001-12-31 2004-03-09 Kimberly-Clark Worldwide, Inc. Method for axial feeding of ribbon material and a stock of ribbon material coils for axial feeding
US6735933B2 (en) 2001-12-31 2004-05-18 Kimberly-Clark Worldwide, Inc. Method and apparatus for axial feed of ribbon material
US10081510B2 (en) * 2010-12-17 2018-09-25 Shanghai Pujiang Cable Co., Ltd. Device and method for winding and unwinding a parallel wire strand horizontally
US20130248638A1 (en) * 2010-12-17 2013-09-26 Zhejiang Pujiang Cable Co., Ltd. Method for Horizontally Winding and Unwinding a Parallel Wire Strand
US9850089B2 (en) 2014-06-20 2017-12-26 Kimberly-Clark Worldwide, Inc. Apparatus and method for controlling the unwinding of a web

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2340149A1 (en) * 1976-02-05 1977-09-02 Benteler Werke Ag Continuous welding machine for steel tubes - has steel strip feed coil and guide to feed successive strips into forming and welding machines

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2871013A (en) * 1956-04-03 1959-01-27 Gpe Controls Inc Web guide
DE1208145B (en) * 1962-02-02 1965-12-30 Driam S A Device for guiding of metal strips
LU43689A1 (en) * 1962-05-08 1963-07-06
US3218000A (en) * 1963-02-18 1965-11-16 Wilson Eng Co Inc Lee Strip handling apparatus
DE1296475B (en) * 1966-04-04 1969-05-29 Buckbee Mears Co Means for unwinding a moving in the vertical plane of the web material from a material drum
US3411728A (en) * 1967-01-24 1968-11-19 Johnson & Johnson Tape-feeding apparatus
US3583310A (en) * 1968-09-06 1971-06-08 Mesta Machine Co Tightener-bander machine
GB1357523A (en) * 1970-06-05 1974-06-26 Molins Ltd Web feeding
US3810591A (en) * 1972-07-13 1974-05-14 Stanley Works Dispensing machine for coil stock
US4058270A (en) * 1976-08-12 1977-11-15 Interlake, Inc. Strap dispensing system
US4304370A (en) * 1980-03-13 1981-12-08 John W. Rogers Strip feed mechanism
DE3326955A1 (en) * 1983-07-27 1985-02-07 Schuler Gmbh L Device for aligning a metal strip on a machining station
US4720054A (en) * 1985-12-05 1988-01-19 Kent Corporation System for supplying strip to a processing line
US4863112A (en) * 1986-04-18 1989-09-05 Bruderer Ag Method for storing coils of wound band-like blank material and for charging a processing machine, and an installation for this purpose
AT77273T (en) * 1986-11-05 1992-07-15 Bruderer Ag Method for storing coils with reeled tape-shaped raw material and for loading a machining machine and system for this.
EP0414853B1 (en) * 1989-02-27 1995-12-27 Bruderer Ag Device for receiving and unwinding coils

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2340149A1 (en) * 1976-02-05 1977-09-02 Benteler Werke Ag Continuous welding machine for steel tubes - has steel strip feed coil and guide to feed successive strips into forming and welding machines

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010016063A1 (en) * 2010-03-22 2011-09-22 Krones Ag Labeling machine for processing roll material and apparatus for receiving roll material

Also Published As

Publication number Publication date
ES2033222T1 (en) 1993-03-16
DE59106301D1 (en) 1995-09-28
AT126739T (en) 1995-09-15
US5482225A (en) 1996-01-09
JPH04258329A (en) 1992-09-14
EP0481323A1 (en) 1992-04-22

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