Textiles: spinning – twisting – and twining – Apparatus and processes – Covering or wrapping
Patent
1997-02-28
1998-08-11
Stryjewski, William
Textiles: spinning, twisting, and twining
Apparatus and processes
Covering or wrapping
57 3, 57 11, 57 13, 57 15, 57 16, 57 18, 57264, D02G 336
Patent
active
057911347
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The invention relates to a winding device for wrapping an elongated product being processed in cable technology with one or more than one elongated product under a prescribable tensile stress. The device has a supply coil for the respective elongated product, having a measuring probe for determining tensile stresses of the elongated product on its path from the supply coil to the product being processed, and having an evaluation/control device which is assigned to the measuring probe.
A winding device of this type is disclosed by DE 42 17 092 C1. It is constructed as a central spiral winder. Arranged about its central axis is an inner carrying element having a supply coil and, on the outside, concentrically therewith, a carrying element having a cage or flyer. With the aid of the flyer, an elongated product is drawn off from the supply coil and wound onto a cable core, which is led through the inner carrying element. In order to determine the tensile stress of the elongated product, there is applied to the outside of the outer carrying element of the cage (flyer) a measuring probe which rotates with the cage about the central axis. The measuring probe is designed in the manner of a bending beam which extends to the outside in the radial direction away from the outer carrying element. On an end or side facing away from the central axis, the beam has an eyelet through which, on its own, only the elongated product is led on the path from its supply coil to the cable core. The measuring probe is suspended in such a way that it can be deflected axially out of its radial direction at least toward one side. In order to measure the tensile stress, the elongated product is guided through the eyelet of the measuring probe, substantially parallel to the central axis, is deflected in the opposite direction and is only then finally fed to the cable core. Under specific practical conditions, it is possible in particular for disturbing variables, such as centrifugal forces, imbalances, frictional forces, to become additionally effective on a measuring probe which is suspended and designed in this way. As a result, it is possible to falsify the measurement result for the tensile stress of the elongated product very much in an impermissible manner.
DE 35 25 022 A1 discloses a central spiral spinner for cable technology, in which a ribbon-like or thread-like spinning material is pulled off from a rotating supply coil with the aid of a rotating flyer and is wound onto a cable core. This spinning material on its own is led over a dancer device which is firmly connected to the flyer, and which is arranged in the external region of the rotating flyer, along the axis of rotation of the supply coil. The working position of the dancer device in this case depends on the tensile stress of the spinning material and is interrogated for the purpose of regulating the coil speed. During the rotation of a dancer device of this type, it is possible, for example, for centrifugal forces to act on its functional parts of the device and to falsify the measurement result for the tensile stress with which the ribbon-like or thread-like material is being drawn off from the rotating supply coil. Thus, in particular in the case, for example, of relatively large rotational speeds, there is the risk that under certain circumstances overstressing or even breakage of the elongated product may occur, since a prescribed tensile stress for the material used cannot be maintained sufficiently precisely.
EP 0 459 322 A1 discloses, in the specialist area of weaving machine technology, a measuring instrument for determining tensile stresses in a thread which is being fed to a weaving machine. In this case, only this one thread is led on its own through an eyelet, which is mounted on a flexible plate or lamina which is deformed by the axial draw-off direction stress, and, this plate is deformed in the axial thread draw-off direction.
SUMMARY OF THE INVENTION
The invention is based on the object of providing a winding device for c
REFERENCES:
patent: 4237687 (1980-12-01), De Vecchis et al.
patent: 4256247 (1981-03-01), Loepfe
patent: 4628675 (1986-12-01), Sakamoto
patent: 4663928 (1987-05-01), Delobel et al.
patent: 5644905 (1997-07-01), Luthardt et al.
Kessel Gunther
Knoch Horst
Loczenski Martin
Luthardt Reiner
Muller Thomas
Siemens Aktiengesellschaft
Stryjewski William
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