GB1058958A - Improvements in guiding apparatus for rotary cutting devices - Google Patents

Abstract

1,058,958. Sawing. TEXTILE MACHINERY DEVELOPMENTS Ltd. Aug. 25, 1965, No. 36436/65. Heading B5L. Guiding apparatus for a power-operated rotary saw 18 comprises a work-supporting table or bench 10 having spaced guide rails 21, and a carriage 19 for the rotary saw mounted for movement along the rails, the carrier being provided with rollers 20, Fig. 2 (not shown) running on the guide rails, each roller and its related rail being so formed as to present engaging surfaces which as viewed endwise of the rail are slanted oppositely on opposite sides of the control plane of the roller at right-angles to its axis. The table has longitudinal members 12 and cross-members 13 forming a frame and bars 16, 17 forming an open structure for supporting the workpiece which may be a sheet of hardboard or corrugated plastic, or may be of stone, brick or tile. A pair of bars 14, 15 extend near one edge of the frame and define therebetween a slot for the saw. The rails 21 are carried by supports 22 and are of rectangular or triangular cross-section with a corner uppermost. The carriage 19 has on one side a pair of rollers 20, each of which consists of a pair of flanges 25, Fig. 2 (not shown) engaging one of the rails and is prevented from moving axially relative to the carriage. The other side of the carriage has one or more rollers which are similar to those on the said one side but are free to move axially. The rotary saw 18 has a blade 26 which extends through a slot in the bottom of the carriage and the slot between the bars 14, 15. The slots are of sufficient width to permit the saw to be tilted one way or the other. A fence 27 is adjustably fitted by means of bolts engaging slots to the frame 12, 13 on one or other side of the carriage. The workpiece may be clamped to the frame by a clamping bar 29 carried by parallel links 30 on mountings 31 on the frame. The bar clamps the work by the force of gravity and can be lifted to an inoperative position by a handle 33 connected by links 36, 38 to the bar. When the bar is raised, the pivot 37 for the links moves through a dead centre position to a position determined by a stop to retain the bar in the raised position. In an alternative embodiment, the rails 40, Fig. 4 (not shown), are V-shaped and the rollers 41 have conical shaped flanges 42.