Winding – tensioning – or guiding – Reeling device – Multiple windings
Patent
1992-12-31
1994-10-25
Stodola, Daniel P.
Winding, tensioning, or guiding
Reeling device
Multiple windings
242407, 191 1220R, 254333, B65H 7502
Patent
active
053581903
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a device for stowing away a cable composed of several leads, in particular a supply cable for a central energy supply system on board aircraft, for example, comprising a rotary winding drum having a hollow cylindrical bearing body for single-layer winding of several turns of the cable, which in its turn is connected by a compensating cable inside the bearing body preferably to a fixed connection, with the compensating cable being more strongly twisted in the axial direction of the winding drum and less strongly when wound onto the winding drum.
A corresponding stowing device is known from WO-A-80/00643. The cable inside the cylindrical bearing body is twisted more or less around the shaft depending on the circumference of the wound or unwound energy supply cable. For thick cables, a device of this type is unsuitable, since twisting over the full length of the compensating cable would not be possible.
A stowing device is known from, for example, EP-B-0 163 025. The winding roller comprises two drum disks, between which lies the connecting cable in its wound state. The distance between the two drum disks is matched to the diameter of the connecting cable such that the wound layers are next to one another in one plane. The connecting cable is, in its wound state, virtually coiled onto an inner face of one of the drum disks. The winding drum itself, which is preferably disposed underneath the passenger boarding bridge. has a vertical rotation axis. The arrangement of the connecting cable ensures that it is not twisted during winding and unwinding, which might otherwise result in a break in the leads forming the connecting cable. The connection between the connecting cable and the fixed connection such as a junction box, i.e. the compensating cable, is coiled inside a dome-shaped housing section in the known proposal, with the leads being exposed to prevent them breaking. These leads accordingly resemble a kitchen whisk, which is twisted into a more or less marked coil shape depending on whether the connecting cable is wound or unwound.
This proposal permits a considerable increase in the effective length of the connecting cable for stowing on the winding drum in comparison with systems in which a compensating drum associated with the winding drum is provided and on which a compensating cable can be wound having a length corresponding to that of the connecting cable (DE-C 33 47 965).
In a cable winding device according to U.S. Pat. No. 2,486,167, a cable to be unwound or wound is passed through a receptacle that is movable in the longitudinal direction of the winding device by means of a spindle.
In a cable drum according to U.S. Pat. No. 3,106,366, movement of the cable over sliding elements designed as rollers is known.
The object underlying the present invention is to develop a device of the type described at the outset such that it is is very compact in design yet provides the possibility of accommodating without difficulty thick cables that can be frequently wound and unwound, without damage in particular to the compensating cable.
The object is attained in accordance with the invention substantially in that the compensating cable or leads thereof exposed in sections are held by a receptacle approximately centrally inside the bearing body.
By the measures in accordance with the invention, that section of the compensating cable inside the bearing body is subdivided into two sections of preferably equal length, as a result of which the twist effect is divided up, permitting a greater number of rotations in the appropriate direction compared to other systems, but without the compensating cable being subjected to an undesirable degree of loading.
To prevent the receptacle causing constraint forces in addition when the compensating cable is rotated and twisted, the receptacle is designed to rotate about the longitudinal axis of the winding drum and relative to said drum.
In particular, the receptacle can be a disk element having at least one aperture intended for passing through the com
REFERENCES:
patent: 2486167 (1949-10-01), Jurasevich
patent: 2533592 (1950-12-01), Landon
patent: 3106366 (1963-10-01), Bernard
patent: 3372887 (1968-03-01), Ladany
patent: 3843094 (1974-10-01), Watts
patent: 4066093 (1978-01-01), Egerstrom
Manfred Fladung GmbH
Nguyen John Q.
Stodola Daniel P.
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