Winding – tensioning – or guiding – Coil holder or support – Spool or core
Patent
1991-10-25
1993-11-02
Stodola, Daniel P.
Winding, tensioning, or guiding
Coil holder or support
Spool or core
2421582, B65H 7500
Patent
active
052577465
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a device for winding and unwinding a wire, such as a relatively thin electric insulated cable, comprising a winding element and a wire guidance means rotatable about the winding element and axially movable along the winding element.
Such devices are known and comprise a rotation-symmetrical cylindrical wire drum which constitutes the winding element. This wire drum is rotatably mounted in a stand and is driven by a motor. A guide rail is attached to the stand and extends parallel to the wire o o drum. A wire guidance means in the form of a wire guide is movable on the guide rail. A wire is wound on and off the wire drum in a manner such that the wire drum rotates at a constant speed while the wire guide guides the wire during a forward and backward movement on the guide rail.
It will be realized that a device of this kind has a relatively high space requirement. This becomes obvious in situations where the diameter is limited and it is desired that the device shall permit unwinding and winding of as long a wire as possible.
The object of the present invention is to accomplish a device of the type described that permits a maximum portion of the radial space occupied by the device to hold wound wire. The device also provides simple construction and reliable functioning.
According to the invention such a device is primarily characterized in that the circumference of the winding element and its speed of rotation and the first speed of axial movement are varied with respect to one another and with respect to the diameter of the wire so that wire is wound up on the winding element by means of the wire guidance means in layer by layer fashion respectively from the surface of the winding element up to a maximum radial extension.
The relative rotatability and axial movement, respectively, between the winding element and the wire guidance means is usually achieved with the aid of one or several electric motors via gearing and steering devices of kinds which are, per se, known.
In a suitable embodiment the wire guidance means comprises a series of supporting rolls having supporting surfaces rotatable about axes which form an angle with the longitudinal axis of the winding element. Suitably the supporting surfaces are so designed that the generatrices for said supporting surfaces in a plane through the longitudinal axis of the winding element, as seen from the end of the winding element where the winding of the wire is begun, form an angle smaller than 90.degree.. The supporting rolls can be shaped as a frustum of a cone to form a supporting surface having the smaller portion directed inward toward the winding element.
The device according to the invention will now be described in detail with reference to the accompanying figures of which:
FIG. 1 shows schematically in perspective a first embodiment of the device according to the invention;
FIG. 2 shows a longitudinal section through the device in FIG. 1 in part;
FIG. 3 shows schematically in perspective a second embodiment of the device according to the invention;
FIG. 4 shows a longitudinal section through the device in FIG. 3 in part; and
FIG. 5 shows a view of a wire guidance means.
In FIG. 1 a winding element is designated by 1. The winding element 1 consists of a cylindrical drum which is mounted in a housing 2 and rotatable relative to the housing by means of a motor 3 via a gear reduction set which is not shown. A wire guidance means 4 is rotatable about the winding element 1 and axially displaceable along the winding element. The wire guidance means comprises three conical supporting rolls 5 having their smaller ends directed inward toward the winding element. The supporting rolls are rotatable about axes extending at right angles from a sleeve assembly which embraces and is rotatable on the winding element. Relative to the housing the wire guidance means 4 is axially displaceable guided by guidance means 6 which is shown in phantom in FIG. 1. The wire guidance means 4 is provided with a pulley 7 over which the wire 9 entering
REFERENCES:
patent: 2858085 (1958-10-01), Strang
patent: 3003748 (1959-11-01), Musser
patent: 3670977 (1972-06-01), Boneck
patent: 3851831 (1974-12-01), Steiner et al.
patent: 3908922 (1975-09-01), Guthrie et al.
patent: 4830298 (1989-05-01), Van Blunk
patent: 4842108 (1989-06-01), Anderson et al.
Krantz Ingemar
Norrvi Hans
Rollins John F.
Saab Missiles Aktiebolag
Stodola Daniel P.
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