Winding – tensioning – or guiding – Coil holder or support – Spool or core
Patent
1991-05-23
1993-05-18
Stodola, Daniel P.
Winding, tensioning, or guiding
Coil holder or support
Spool or core
53589, 242 81, B21C 4724, B65B 2706
Patent
active
052113507
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The invention relates to a system for producing strapped rolls of wiring screening, or mesh.
BACKGROUND
It is known to provide a system having a windup device that has a driven windup mandrel for winding up wire screening delivered to it, and a guide for threading the wire screening into the windup mandrel. A strip-off device is provided with which the wound wire screening roll is movable relative to the windup mandrel in the axial direction. A gripper mechanism that has gripper arms is pivotable from above and below toward the outer surface of the roll of wire screening and is movable by means of a transport device from a first position, in which it receives the roll of wire screening in the region of the windup device by means of the gripper arms, via a distance exceeding the length of the roll in the direction of the windup mandrel axis, into a second position remote from the windup mandrel. A surrounding strap application device for the wound roll of wire screening is provided, with a surrounding strapping frame for a surrounding strapping element.
A system of this above-described type, known from Austrian Patent 276.028, has the disadvantage that the gripper, mechanism is movable from the first position to the second position only passively with the aid of an ejector plate, a stationary surrounding strap application device being provided in the second position. Finely sensitive operation of the strap application device and adaptation of it to various dimensions of screening rolls or strapping requirements is therefore impossible.
THE INVENTION
The object of the invention is to overcome this disadvantage and to create a system of the type generally described above with which the roll of wire screening can be tied off with great accuracy at arbitrary points along the length of the roll with the aid of surrounding strapping elements.
Briefly, the system according to the invention has the characteristics that the gripper mechanism has at least two gripper arm units that are independent of one another and are provided with associated retainers and is adjustable to freely selectable positions in a controlled manner parallel to the axis of the windup mandrel by means of a carriage carrying the gripper mechanism and movable on rails in a manner known per se, and that the strapping frame, adjustable in a manner known per se at right angles to the axis of the windup mandrel, is likewise mounted on a carriage and is movable with this carriage on rails, in a controlled manner parallel to the axis of the windup mandrel, to freely selectable strapping positions, the gripper arms of each gripper unit being pivotably away from the roll of wire screening in a controlled manner in order to move past the strapping frame.
With this system, operation of the windup device is essentially continuous and at the same time accurately controlled adjustment of the roll of screening relative to the strapping devices is attained, which enables automatic strapping at arbitrary points of the roll of screening. In moving past the strapping frame, the gripper arms of one unit are each pivoted away in alternation, while the gripper arms of the remaining units securely hold the roll of screening and thus prevent the roll of screening from becoming twisted, dropping at one end, or unintentionally becoming wound up.
In a preferred embodiment of the invention, the retainers of the gripper arm units are formed by bearing plates adjustable relative to one another in the direction of the axis of the windup mandrel and oriented transversely to this mandrel; these plates are mounted on the gripper mechanism carriage, and the pivot bearings for the gripper arms are provided on them above and below the axis of the windup mandrel. The gripper arms preferably grip the roll of wire with their free ends, via retainers extending parallel to the windup mandrel axis and preferably being adjustable in the direction parallel to that axis. With this embodiment, secure but gentle holding of rolls of wire screening various diamet
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patent: 2198644 (1940-04-01), Wettengel
patent: 2818795 (1958-01-01), Gustafson
patent: 3032289 (1962-05-01), Frederiksson et al.
patent: 3424398 (1969-01-01), Garnier
patent: 4333301 (1982-06-01), Koutonen et al.
patent: 4512529 (1985-04-01), Kampf
patent: 4669247 (1987-06-01), Woffendin
patent: 4944139 (1990-07-01), Neilsen et al.
Ritter Gerhard
Ritter Klaus
Schmidt Gerhard
EVG Entwicklungs- u. Verwertungs- Gesellschaft m.b.H.
Rollins John
Stodola Daniel P.
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