Winding – tensioning – or guiding – Coil holder or support – Spool or core
Patent
1991-12-04
1993-09-07
Stodola, Daniel P.
Winding, tensioning, or guiding
Coil holder or support
Spool or core
242 586, 242 684, B65H 7500, B65H 1930
Patent
active
052421279
DESCRIPTION:
BRIEF SUMMARY
This invention relates to an apparatus for reeling or unreeling a cable or the like, comprising
a frame,
two supports mounted vertically immovably on the frame, said supports being horizontally movable towards and away from each other in accordance with the axial width of a reel,
a suspending arm mounted in each support, said suspending arm being provided at the lower end with a gripping means for gripping a centre of the reel and arranged displaceably in vertical direction with respect to the support over a distance corresponding to the sum of a height difference between the centre of a largest reel and the centre of a smallest reel and a lifting distance of the largest reel, and
power means to vertically displace the suspending arms.
This kind of apparatus is used especially in the cable industry for reeling or unreeling cables, but the apparatus is equally applicable when reeling other similar products, such as ropes. The purpose of the apparatus is to raise the reel so that it can be rotated about its central axis. The apparatus comprises gripping pins for gripping the reel from a central hole or from some other lifting means provided on opposite sides of the reel. Even though the reels are originally symmetrical on both sides, and the central holes are positioned accurately on the same horizontal axis, the reels and especially their two flanges may be damaged and deformed in use so that the reel to be lifted is no longer positioned in an upright position on the underlying surface but slants so that the central holes of the reel are positioned at different heights with respect to each other. The same situation occurs when the underlying surface has worn unevenly. Therefore the gripping pins of the apparatus must be able to compensate for height differences between the central holes. In addition to this, the apparatus should, of course, be able to handle reels of different diameters.
Finnish Patent Specification 61012 (Swedish Patent Specification 392,185) discloses a cable reeling apparatus in which the gripping pins are fastened to suspending arms mounted vertically displaceably in supports fastened to the frame of the apparatus, more precisely, to horizontal beams supported by two columns of the frame. The supports are thereby fastened to the horizontal beams in such a way that the supports maintain their vertical position relative to the horizontal beams but are nevertheless horizontally moveable along the beams. For gripping the reel, the suspending arms can be raised and lowered so that the reels can be raised off the floor level sufficiently to be rotated freely.
This kind of cable reeling apparatus, however, has certain major disadvantages. Since the supports for the suspending arms are fastened to the frame vertically immovably, the suspending arms have to be lowered rather a long distance in order that the gripping pins of the suspending arms could be pushed into engagement with the central holes of the reel. After raising the suspending arms to such an extent that the reel is able to rotate, the suspending arms remain rather long. The rotation of the reel causes considerable stresses in the suspending arms, which results in vibration and swaying and may disturb the reeling and possibly damage the suspending arms. A further disadvantage is that to prevent swaying of the suspending arms during the reeling, the suspending arms must be journalled in their supports with a clearance as small as possible. As a result of this, the gripping pins in the lower ends of the suspending arms are not able to be displaced to any greater degree in the sideward direction in their lowered position. Therefore, the gripping pins are not able to find central holes which have been displaced slightly from the original position due to damage or for some other reason.
To avoid these disadvantages, cable reeling apparatuses have been developed in which the supports for the suspending arms are vertically movable with respect to the frame. One such apparatus is disclosed in Finnish Patent Specification 60542 (German Paten
REFERENCES:
patent: 1874904 (1932-08-01), Crafts
patent: 3123314 (1964-03-01), Bruestle
patent: 4098468 (1978-07-01), Skalleberg
patent: 4679743 (1987-07-01), Dallmaier
Nokia Maillefer Oy
Rollins John
Stodola Daniel P.
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