GB989151A - - Google Patents

Abstract

989,151. Drafting-apparatus. SPINDELFABRIK SUSSEN, SCHURR, STAHLECKER & GRILL G. m. b. H. Dec. 30, 1963 [Dec. 29, 1962], No. 51220/63. Heading D1D. In a supporting and loading arm for drafting apparatus having centrally-guided twin rolls and a U-shaped guide rail adjustably carrying a bracket for each roller pair, each bracket engaging the lateral sides of the rail and having at its free end a recess for a roller pair and also having a loadspring, each bracket has at least one arm extending obliquely toward the front and/or toward the rear and engaging the side-walls of the rail near the lower edges thereof, while the spring takes the form of a leaf-spring extending substantially parallel to the arm or arms and presses with its free end on the shaft of the associated roller pair. In Fig. 1, each bracket 3 is cast or moulded and is adjustably bolted in a slot in the rail 1. The bracket has a downwardly inclined arm 4 ending in a recessed part 5 carrying a bearing 6 for the central shaft of a roller pair 8. Each bolt 2 also secures a tapered spring 9 substantially parallel to the arm 4 and pressing at its free end on the bearing 6. When the guide rail is lifted, stops 201 limit the drop of the springs and the rolls are retained by springs 202 disposed between walls 5<SP>11</SP> on one side of the recess 5. The arrangement allows the brackets and rolls to be set closely together. In Fig. 4, the brackets 44<SP>1</SP> are adjustably secured by bolts 42 passing through a washer 405, its edges serving as markers in conjunction with a scale on the rail 41. The brackets are of sheet metal of U-section, with their free ends formed with recesses 45, the walls of which are tempered, and with their sides slightly spread so that they press against the sides of the rail. Each spring 49 is pivoted to its bracket and is tensioned by a set-screw 404 bearing at one point on the spring. Retaining-springs 402 are carried by members 45<SP>111</SP> inturned from the walls of the bracket. One of these springs secures a bracket 408 for a clearer. A cover 406 forming part of a locking- lever is provided. In Fig. 8, the brackets 83 and springs 89 extend first rearwardly and then forwardly in elbow-shape, the markets being of sheet metal of U-section to provide walls which are ribbed as at 107, 108, to engage each side wall of the rail. The arm 85<SP>11</SP> at one side of the recess has a removable or moulded plastic covering 85<SP>111</SP> The arrangement allows the use of long brackets secured at points close to the vertical plane of the associated rolls. In Fig. 10, each bracket is attached by a bolt 102 extending through a washer 102<SP>111</SP> and a threaded plate 102<SP>1</SP> which also receives a set screw bearing at right angles on a spring 109. The washer stands proud of a plate 115 which can be lifted and rotated to one side to give access to the set-screw, the arrangement also allowing the position of the bracket to be adjusted without interfering with the set-screw. The spring is attached to a downturned lug 119 of the bracket passing through an aperture therein, and being held by a tab (Fig, 10a, not shown). By reversing one of the brackets, an area is provided between the rolls 108, 108<SP>1</SP> in which clearer(s) 120 are carried by slots or projections 120<SP>1</SP>, 120<SP>11</SP>. In Fig. 12, the inclined bracket arms 123À123<SP>11</SP> support roller pairs at maximum distances apart in a relatively short rail, one pair 128 lying in front of the rail and the third 128<SP>11</SP> lying near the pivot of the rail. The arm 123 is provided with a cover 130 and supports a roller 131 for tensioning an apron carried by the middle roller. The guiderail may support a guide 130. By inclining the three arms in the same direction, the rollers may be moved close together.