| 摘要 |
Raw bricks are cut from an extruded column of clay and conveyed in single file past a sensing means including an inclined light path extending between a light source and a plurality of photocells arranged linearly along one side of the conveyor. The light path cuts through one corner of each brick, and the photocell arrangement measures the thickness thereof. The sensing means is adapted for use with both "standard" and "utility" size bricks and also effective to determine undersize as well as oversize bricks. A brick ejecting means is mounted adjacent the conveyor, immediately succeeding the photocells, and is responsive to the sensing means to eject prescribed bricks of improper thickness. The ejecting means includes a pivotal kickoff lever attached to the free end of an air cylinder and so arranged as to deliver a sharp blow to the end of a prescribed brick during the upward portion of its arcuate path. Such an arrangement imparts to the brick a strong, upward and outward movement without further or continuous engagement by the lever, and eliminates the frictional drag of the conveyor belt facilitating removal of the brick therefrom. The transverse path of the lever is angularly adjustable with respect to the conveyor path, so that the force imparted by the lever includes a longitudinal component along the conveyor path as well as a transverse component to utilize somewhat the impetus of the brick along the conveyor in lifting and removing it therefrom.
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