| 摘要 |
1,114,631. Cutting apparatus. CINCINNATI MILLING MACHINE CO. 26 April 1966 [12 May, 1965], No. 18301/66. Heading B4B. A machine for cutting material, such as cloth, supported thereon comprises an endless cutting blade 56 carried by two spaced pulleys 49, 50 and extending between the pulleys in two paths of travel which are located close together at a point between the pulleys. The pulleys are mounted on a carriage 12 having a motor 13 connected by gearing 15, 16 to a shaft 17 on which are gears 18 engaging racks 19 on a frame 10 whereby the carriage is movable along ways 11 on the frame. The carriage supports two upper rollers 25, 26, Fig. 1, and two lower rollers 27, 28 and a flexible belt 29 having its ends secured to the frame is threaded through the rollers. Two shelves denning a gap therebetween are mounted adjacent the upper rollers, the cutting blade extending through the gap. When the carriage is moved by the motor 13, the blade and gap move together so that the blade cuts stationary material supported on the belt. The carriage has an upper and lower part respectively above and below the plane A in which the material is supported, each part having a pair of guide shafts 34, 35, 36, 37, Fig. 4, along which upper and lower cross slides 38, 39 are movable in unison by cross screws 40, 41 interconnected by a shaft 62, Fig. 2, driven from a reversible motor 60. Each cross slide rotatably supports a vertical shaft 45, 46, each shaft having a gear 69, 74 engaged by a worm 68, 73 on splined shafts 67, 72 which are supported in the upper and lower parts of the carriage, are interconnected by a vertical shaft 71, and driven from a reversible motor 65. Each vertical shaft 45, 46 is secured to a bracket 47, 48 rotatably supporting one of the pulleys 49, 50, pulley 49 being connected to an electric motor 51. The brackets carry a plurality of small rollers 57 arranged in arcs to guide the cutting blade so that, between the pulleys, the paths of the blade are close together. One edge of the blade is bevelled whereby, at the cutting area, the blades present a combined edge B, Fig. 6, the two paths of the blade at the cutting area being guided by studs 59 in the bracket 48. In operation, the motors 13, 60 and 65 for moving the carriage 12, the cross slides 38, 39 and rotating the brackets 47, 48 are controlled by a circuit to which signals are transmitted from a punched tape reader, the blade being thus movable in any direction relative to the material to be cut and always maintained tangential to any curved cut being effected. |
