EP0427281A2 - Unwinding reel, particularly for coils of wire - Google Patents

Abstract

The invention relates to an unwinding reel, which can be mounted rotatably on a rotary table, for coils, in particular for coils of wire, with a coil support arrangement which is held by a stand and on which the coil to be worked off in a vertical direction can be placed from above, which has at least one essentially horizontal support surface and a number of essentially vertically aligned support parts standing at uniform angular distance from one another, which, to centre the coil, are displaceable radially outwards against the force of a return device, under the action of the weight force of the coil on the support surface, and with a fixing device for the coil support arrangement. In order to be able to carry out considerably more economically the working of wire, cables or the like, which are available in the form of coils wound without spools, the invention proposes that the unwinding reel is in operation mounted removably on a centring pin assigned to the rotary table and that the fixing device is designed as a variable locking device of the radial displaceability of the support parts. <IMAGE>

Description

The invention relates to a reel for coils, in particular wire coils, which can be rotatably supported on a turntable, with a coil carrier arrangement held by a stand, onto which the coil to be worked in the vertical direction can be placed from above, which has at least one essentially horizontal contact surface and several at an even angular distance from one another , Has essentially vertically aligned support parts which can be displaced radially outwards for centering the coil against the force of a restoring device under the action of the weight of the coil on the bearing surface, and with a locking device for the coil carrier arrangement.

To simplify the warehousing and handling of wire, cable or the like, both at the manufacturer and at the processor, there is an increasing tendency to reel semi-finished products, such as. B. wire rings, d. H. to use so-called "coils". This has particular economic advantages, because in this way no empties storage, no administration and no separate handling for wire spools, drums, crown stands, etc. more is needed. In addition, coils can be easily stored in a small space, with the additional advantage that empties transport costs are eliminated.

A coil is regularly wound in layers from the inside and oscillating in the vertical direction, the outside diameter growing from layer to layer until the desired coil weight is reached. The height and the inner diameter of the coil do not change as the coil grows. With this technique it is sufficient to use the coil After reaching the target weight, tie it with band irons in several places to bring it into a ready-to-ship condition. This results in great advantages with regard to transport and space-saving storage, it being shown that transport damage could also be effectively reduced in this way. An additional advantage is that with a given capacity of the device processing the semifinished product, longer production run times can be realized both by the consumer and by the manufacturer, which further benefits the economy of cable or wire production and processing.

The advantages listed above speak in principle for the use of such coils. However, in order to be able to fully exploit these advantages, it is necessary to provide drainage devices with which coils can be processed without problems. Such a device must first open up the possibility of placing or exchanging the coil with simple kinematics. It must also ensure that excessive unbalance forces do not occur when processing the coil, which would lead to considerable problems and difficulties in cable or wire processing. Finally, care must be taken to ensure that the windings of the coil remain stabilized during processing and on the other hand do not jam, so that withdrawal forces which are as uniform as possible occur.

From FR-PS 25 83 027 a decoiler with a turntable is known, the decoiler being operationally arranged on the turntable. The drive shaft of the decoiler passes through the decoiler, starting from the turntable. On the top, from the drain reel protruding end of the drive shaft, a bearing is flange-mounted. Overall, the known decoiler is namely pivotable about a horizontal axis. A coil can be put on or taken off in the vertical alignment of the axis of the decoiler and thus also the drive shaft. The coil is processed in a horizontal orientation, i.e. after the axis of the decoiler has been swiveled. Here, however, the problem of imbalance does not exist to the extent that this only arises with horizontal processing.

Starting from the above-described prior art, the object of the invention is to provide a decoiler of the type in question, with which it is possible to carry out the processing of wire, cable or the like, which are in the form of coils, in a substantially more economical manner.

The object is achieved in the invention specified in claim 1. This is based on the fact that the decoiler is operatively removably mounted on a centering pin assigned to the turntable and that the locking device is designed as a variable locking device for the radial displacement of the support parts. According to the invention, the decoiler can be detachably or removably placed on the turntable during operation. The decoiler with the coil on it can be removed, even after it has only been partially processed. A new decoiler with a further coil can then be put on or, for example, a coil that has already been partially processed and is located on a decoiler can be put back on for further processing. In an embodiment it is also provided that the decoiler has a central transport hook, by means of which the The decoiler is removable from the turntable. Due to the central reception of the coil from the coil carrier arrangement, the center of gravity of the entire arrangement is in the center position and thus below the central transport hook. Removing and replacing the transport reel is therefore much easier. Only a single rope or the like is necessary in order to lift the decoiler from the centering mandrel without tilting and / or to place it on the centering pin. The separate locking option of the support parts, which is infinitely possible, enables coils of different diameters to be securely picked up and centered on the decoiler. This locking option also makes it possible to remove the decoiler as desired from the turntable in order to possibly place another decoiler with a different coil. A particularly simple kinematics for converting the weight of the coil into the radially acting centering force results from the configuration that the coil carrier arrangement has at least three angles arranged at an equal angular distance from one another, one leg of which forms the respective contact surface and the other leg of which forms the respective supporting part, the brackets are attached to the stand using identical suspensions. It has been shown that a wire coil can withstand the stresses occurring without complications even with a merely linear bottom support on the end face. The size of the support surface for the coil has practically no influence on the centering process itself. It should be taken into account that the coil is placed from above regularly with the aid of a conveyor, for example a crane system, with which the coil is transported hanging over the reel. When the coil is lowered, it acts on the support surface of the coil carrier arrangement not immediately the full weight, but initially only a force that has to be opposed to the return device. In this floating state of the coil, the centering alignment is easily possible with low contact forces between the bearing surface and the coil. The further development according to claim 3 results in the additional advantage that the band irons with which the coil is tied for transport and / or shipping purposes are freely accessible and can therefore be removed without difficulty, which further simplifies handling.

The support parts which can be clamped radially from the inside against the coil are preferably displaced parallel to themselves during the centering process of the coil, which is particularly desirable when the coil has a cylindrical inner surface. In this way, the wire windings can be optimally stabilized over the entire height of the coil.

Such a parallel displacement of the supporting parts can be realized with the simplest measures with the measures according to claim 5, this further development having the particular advantage that it is also able to withstand the rough operation during wire processing. With this development, the reset device can also be implemented in a simple form, for example in the form of a spring, which preferably acts on the lower end of the vertical leg.

If the stand can be placed on a turntable with a centering spigot, there is the additional advantage that the decoiler can be removed from the centering spigot with the coil centered and stabilized. This can be advantageous, for example, if a partially processed coil is to be moved to another production facility or temporarily stored. For this purpose, only the stand with a coil carrier arrangement has to be lifted out, no additional measures having to be taken to secure the partially processed coil. The construction of the coil support arrangement according to the invention has the additional advantage that the space required for the intermediate storage of the decoiler remains extremely small.

Especially when the coil carrier arrangement is locked in the centering position, the intermediate decoiler can be reintegrated into the production process in a very short time by placing the stand with the coil on the centering pin from above.

The decoiler, as has been described in detail above, which can be stored in an operationally removable manner on a pivot of a turntable, is associated with a further particular advantage. Insofar as such a turntable is not absolutely necessary, the separately removable waste reel can also simply be placed on the floor and a separate dancer can be arranged for this purpose, which moves around the waste reel and allows the wire or the like to be pulled off upwards. In this way, coils wound without bobbins can also be efficiently processed using such a dancer arrangement. With regard to the arrangement of dancers, reference is made in detail to British patent applications 81 12 094, 81 25 291 and 82 10 837.

• Fig. 1 einen Schnitt einer Ablaufhaspel in einem Betriebszustand, in dem das Coil gerade aufge­legt wird;
• Fig. 2 die Ablaufhaspel gemäß Fig. 1 während des Verarbeitens des Coils;
• Fig. 3 eine Draufsicht der Ablaufhaspel gemäß Fig. 1 und 2;
• Fig. 4 die Ablaufhaspel bei teilweie abgearbeitetem Coil in einer ausgehobenen Stellung des Stän­ders;
• Fig. 5 eine Seitenansicht des Drehtellers, teilweise geschnitten;
• Fig. 6a+b Einzelheiten der Lagerung des Ständers auf dem Zentrierzapfen des Drehtellers; und
• Fig. 7 eine perspektivische Darstellung der Ablaufhas­pel.

The invention is explained in more detail below with reference to the accompanying drawing, which merely represents an exemplary embodiment. Here show:

• 1 shows a section of a decoiler in an operating state in which the coil is being placed;
• FIG. 2 the decoiler according to FIG. 1 during the processing of the coil;
• 3 shows a plan view of the decoiler according to FIGS. 1 and 2;
• 4 shows the decoiler with the coil partially processed in a raised position of the stand;
• Fig. 5 is a side view of the turntable, partially in section;
• Fig. 6a + b details of the storage of the stand on the centering pin of the turntable; and
• Fig. 7 is a perspective view of the decoiler.

In Fig. 1, the reference numeral 6 designates a reel overall, which has a turntable 2, with a vertical axis of rotation AA. The turntable 2 has a centering pin 4 for receiving a vertical column or a stand 8 of the decoiler 6. The stand 8 has a column-like structure and consists of four supports 8a-8d, which are arranged at an angular distance of 90 ° to one another, in the upper area are connected to a unit via a strut 10. The upper strut 10a can carry a transport hook 12 in the middle.

The stand 8 in turn supports the actual coil carrier arrangement 14, the at least three, in the embodiment shown four supporting parts 16a-16d which are at an equal angular distance from one another, and at least one horizontally oriented support surface 18 for a wire coil 20 to be placed on it. 1, the coil carrier arrangement 14 is formed by four identically designed angles, the vertically oriented legs of the support parts 16a-16d and the horizontally oriented legs 18a-18d of which form the contact surfaces for an end face 22 of the coil 20.

The angles formed by the angled legs 16a, 18a to 16d, 18d are fastened to the stand 8 with their vertically arranged support parts 16a-16d by means of a parallelogram link mechanism, with each vertical support part 16a-16d being assigned a support 8a-8d of the stand 8. The handlebars of the respective parallel link transmission are designated 24a-24d and 26a-26d. A restoring device in the form of a tension spring 28a-28d engages the angle on the one hand in the upper region of the carrier 8a-8d and on the other hand on the lower region of the vertical legs 16a-16d in order to pretension the latter into the position shown in FIG. 1. In this position of the support parts, the diameter DA of the circle on which the outer surfaces of the angle legs 16a-16d come to lie is smaller than the inner diameter DI of the coil 20, so that the latter can be conveniently placed on the decoiler 6 from above. This placement can be done with a relatively coarse alignment to the axis AA, for example by the coil 20 using a suitable conveyor such. B. is brought into a suspended position above the decoiler 6 by means of a crane system. This is indicated in Fig. 1 by the suspension cable 30, the carries hooks 32 at the end, which engage with steel strips, not shown, with which the coil 20 is tied for transport purposes.

The coil 20 can now be lowered from the suspended position above the decoiler 6. As soon as the lower end face 22 meets the bearing surfaces 18a-18d, the weight of the coil 20 increasingly acts on the angles, whereby these are increasingly spread outwards by pivoting the levers or links 24 and 26 while executing a parallel displacement movement, until they are over the the entire height of the coil come into contact with its inner surface. As a result, the actual centering process for the coil 20 begins. The coil 20 is sufficiently stable to align the bearing surfaces 18a-18d in a common horizontal plane via the end face 22. This alignment in a common horizontal plane is only possible due to the identical steering gear arrangements if the angles each keep the same distance from the axis A-A of the decoiler 6. The coil 20 is thus forcibly centered or stretched from the inside by its own weight, which is shown in FIG. 2. In this state, the outer surfaces of the vertical legs 16a-16d lie against the inside over the entire height of the coil 20 and in this way stabilize the coil and the turns. It should be emphasized in particular that the centering process is initiated during the lowering movement of the coil 20, which takes relatively little time in this way.

2, in which the processing of the coil 20 can take place, is blocked because the inner diameter of the coil 20 blocks the movement of the links 24 and 26. It is about this Purpose required to adjust the length of the links 24 and 26 to the inner diameters DI of the coil 20. The handlebar gear is preferably locked in the position of the angles according to FIG. 2. In particular, the locking is effected by a tab 36 which is articulated to the support 8 and has an elongated hole 35. A screw locking lever 37 is caught in the elongated hole and can be screwed onto the handlebar 24c, for example. After a coil has been put on, the coil carrier arrangement 14 can be locked in this way in the tensioned position. Even after the coil has been largely processed, when its weight decreases, the coil carrier arrangement 14 does not automatically return to a position according to FIG. 1. Specifically, four such tabs 36 are provided in the exemplary embodiment, each acting between the stands 8a-8d, at their upper ends and the links 24a-24d (cf. also the perspective illustration in FIG. 7).

In the attached or centered state of the coil 20 (see FIG. 2), the steel straps constricting the coil 20 can be removed with ease, since the coil 20 is accessible in the entire free space between the angles 16, 18.

It is clear from the above description that the weight of the coil 20 itself determines the centering force with which the coil is clamped and the windings cannot tip over and become jammed. A particular advantage of the subject matter of the invention is that the clamping force becomes smaller as the weight of the coil 20 becomes smaller, ie while the coil is being worked through, as a result of which excessive stresses on the inside of the coil can be effectively excluded.

Due to the extremely exact centering of the coil 20 in relation to the axis A-A of the decoiler, high processing speeds are possible, especially since the column-like stand 8 can be guided by the centering pin 4 over a relatively large height. For high working speeds, it is preferable to rotate the decoiler 6 together with the turntable 2. However, it is also possible to make the centering pin 4 stationary and to make the column 6 rotate relative to the centering pin 4.

So that the wire, the cable or the like cannot come off during the unwinding, a guide ring 34 is placed on the horizontal legs 18a-18d, which has a larger outer diameter than the coil 20. The guide ring 34 is arranged so that it comes to lie slightly above the bearing surface 18 of the coil 20 to be processed, so that falling turns can be absorbed. The guide ring 34 is formed continuously and is connected in a form-fitting manner to holder supports 38 which are displaceably arranged in the support surface 18 or more precisely the legs 18a-18d. In detail, pins 39 are formed on the guide ring 34, which - in the installed state, cf. Fig. 1 - are aligned vertically downward and engage in receiving tubes 40 which are fixedly connected to the bracket supports 38. Due to the fact that the holder carriers 38 are arranged displaceably in the legs 18a-18d, the stand 8 can easily move back into its starting position (FIG. 1) after a coil has been worked through. The bracket supports 38 are then extended the farthest from the legs 18a-18d. It goes without saying that the holder carriers 38 are of such a length that even in the latter state there is still a sufficient length overlap with the legs 18a-18d.

With the help of this guide ring 34, it is possible to unwind the wire, the cable or the like without problems up to the end of the coil.

In the event that a coil is to be implemented in the partially processed state in the production process or to be temporarily stored elsewhere, the entire decoiler 6, as shown in FIG. 4, can be lifted off the centering pin 4 by a conveyor device engaging the transport hook 12. In this way, the coil 20 can be transported in the partially processed state while maintaining the internal tension or centering, and can later be put back onto the centering pin 4 with little expenditure of time.

Of course, it is possible to design the decoiler differently from the specifically described exemplary embodiment without thereby leaving the basic idea of the invention. For example, it is possible to vary the number of support parts, ie angles. For example, it is conceivable to use three angles arranged at an angular distance of 120 °. However, more than four angles can also be used, as long as there is a uniform radially outward bracing of the coil 20. It is also possible to design the reset device differently, for example by means of a gas spring element or the like. Finally, the column construction is not limited to a welded construction with the aid of several standing beams, although this allows the mass of the decoiler and thus the mass forces occurring during the processing of the coil to be kept very small. The decoiler is particularly not limited to wire coils. It can be used for coils different materials, e.g. B. also for cables, with the same advantages.

In Fig. 5, the turntable 2 is shown drawn out in detail, with only partially shown storage locations on the struts 10a and 10b. This storage is shown again in greater detail in FIG. 6. It can be seen that the lower bearing, which is assigned to the strut 10b in the exemplary embodiment, is essentially designed as an axial bearing, while the upper bearing, FIG. 10a, is essentially designed as a radial bearing (assigned to the strut 10a). The bearing is realized in each case by ball bearings 41 (axial bearings) and 42 (radial bearings).

In particular, also from Fig. 7 it is clear that in the embodiment, the support parts 16a-16d are formed from U-profiles, with an opening facing centrally inwards. In contrast, the legs 18a-18d and the bracket 38 are formed from rectangular profiles.

The features of the invention disclosed in the above description, the drawing and the claims can be of importance both individually and in any combination for the implementation of the invention.

Claims (10)

1. On a turntable rotatable storage reel for coils, in particular for wire coils, with a coil holder arrangement held by a stand, on which the coil to be worked in the vertical direction can be placed from above, which has at least one essentially horizontal contact surface and several at a uniform angular distance from one another , Has essentially vertically aligned support parts which can be displaced radially outwards for centering the coil against the force of a return device under the action of the weight of the coil on the bearing surface, and with a locking device for the coil support arrangement, characterized in that the decoiler is operationally removable a centering pin assigned to the turntable is mounted and that the locking device is designed as a variable locking device of the radial displaceability of the support parts. 2. decoiler according to claim 1 characterized by a central transport hook (12). 3. decoiler, in particular according to one or more of the preceding claims, characterized in that a latch (36), which is articulated on the carrier (8) and cooperates with an angle leg (16a-16d), is provided for locking. 4. decoiler, in particular according to one or more of the preceding claims, characterized in that the coil support arrangement (14) on the bottom carries a guide ring (34) slightly above the Aufla surface (18) comes to lie radially outside of the attached coil (20). 5. decoiler, in particular according to one or more of the preceding claims, characterized in that in the bearing surface (18) (the legs 18a to 18d) slidably arranged holder carrier (38) are provided, with which the guide ring (34) cooperates in a form-fitting manner. 6. decoiler, in particular according to one or more of the preceding claims, characterized in that the bearing on the turntable is realized by a separate axial bearing (41) and an axial bearing (42). 7. decoiler for coils, in particular for wire coils, with a coil support arrangement held by a stand, onto which the coil to be worked in the vertical direction can be placed from above, which has at least one essentially horizontal contact surface and several, at a uniform angular distance from one another, essentially vertically aligned Has support parts, which can be displaced radially outwards for centering the coil against the force of a restoring device under the influence of the weight of the coil on the bearing surface, and with a locking device for the coil carrier arrangement, characterized in that the decoiler is independent, for transport with a located thereon Coil is formed and that the coil carrier assembly carries a guide ring on the bottom, which comes to lie slightly above the support surface (18) radially outside the coil (20). 8. decoiler according to claim 7, characterized in that the locking device is designed as a variable locking device of the radial displacement of the support parts. 9. decoiler according to one of claims 7 or 8, characterized by a central transport hook (12). 10. decoiler according to one of claims 7-9, characterized in that for locking a hinged to the carrier (8), with an angle leg (16a-16d) cooperating tab (36) is provided.

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