Winding – tensioning – or guiding – Coil holder or support – Spool or core
Patent
1993-02-16
1994-06-21
Jillions, John M.
Winding, tensioning, or guiding
Coil holder or support
Spool or core
B65H 1606, B65H 1810
Patent
active
053222334
DESCRIPTION:
BRIEF SUMMARY
CROSS REFERENCE TO RELATED APPLICATIONS
This application is a national phase application corresponding to PCT/EP92/01460 filed 29 Jun. 1992 and based, in turn, upon an application P41 23 304.2 filed in Germany on 13 Jul. 1991 under the International Convention.
FIELD OF THE INVENTION
The invention relates to a guide head for heavy winding rolls and, particularly, for heavy winding rolls with a guiding element insertable in a core of the winding roll.
BACKGROUND OF THE INVENTION
Guide heads are used in winding machines for winding or unwinding of winding rolls consisting of paper or cardboard webs, for holding the winding rolls during winding or unwinding operation. Two guide heads, freely rotatably or drivably supported in the winding machine (e.g in winding brackets) are introduced on each side into the winding core of the winding roll.
If the winding rolls are not supported during winding and unwinding, e.g. by a support or bearing cylinder, in the case of particularly heavy winding rolls the intrinsic weight of the roll can cause the bending of the cores, which are usually made of cardboard, in the area between the two guide heads, causing roll defects. In this case the roll turns slightly eccentrically in the core area, resulting in restoring forces during rotation, which lead to displacements in the wound-up layers. These displacements in the wound-up layers can cause bursting or crinkling in the core area.
From DE 25 26 497-B1 a generic grip head mounted to the end of a drivable shaft is known, which consists of a guide part and a torque-transmitting part. The guide part comprises a hub nonrotatably connected to the shaft end, with a cylindrical, slightly spherical surface, surrounded by a bearing sleeve. At its one end close to the shaft end, the bearing sleeve has circumferentially distributed axial slots in order to be able to perform inclinations, so that its peripheral surface can follow the flexing of the winding core. The second part nonrotatably connected to the guide part comprises a segmented sleeve with multiple axial slots and with pressure elements, pushing the segments radially to the outside when the segmented sleeve is rotated, so that torque can be transmitted. With respect to the second part, the first part has radial play and can be inclined, so that it can adjust to the alignment of the core. Due to the adjustment of the two parts to the flexing of the winding core, the strain exerted on the ends of the winding core is reduced.
This grip head of a very expensive construction with radially expanding grip segments is designed for the transmission of torque. The guide part is nonrotatably mounted on the driven shaft, which for this reason requires an expensive pivoting support arrangement in the winding machine.
OBJECT OF THE INVENTION
It is the object of the invention to provide a guide head having simple construction and capable to adjust to the flexing of a core.
According to the invention the guide part is rotatably supported on a nonrotatable trunnion, which therefore is easily supported in the winding machine. When no external radial forces are acting, the support element centers the guide part coaxially with respect to the trunnion axis, so that the guide heads can be introduced into the new winding cores without problems.
The arrangement of the pivot bearing in the area of the trunnion end, i.e. outside the machine part to which the guide head is fastened, has the further advantage that the nonrotatable trunnion can be axially slidably supported in a constructively simple manner, e.g. by means of a centrally engaging worm drive. Since the two guide heads holding a winding core have to be pulled away from each other in axial direction when a wound-up roll has to be discharged or a new winding core has to be inserted, this can be done without moving the machine part to which the guide heads are attached. The guide heads can be simply lowered into the machine part.
BRIEF DESCRIPTION OF THE DRAWING
The above and other objects, features and advantages of the invention
REFERENCES:
patent: 3215358 (1965-11-01), Way
patent: 3797772 (1974-03-01), Lucas
patent: 4105171 (1978-08-01), Sciola et al.
patent: 5123605 (1992-06-01), Hehner et al.
Hehner Reinhard
Muller Georg
Welp Ewald G.
Dubno Herbert
Jagenberg Aktiengesellschaft
Jillions John M.
Kateshov Yuri
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