Abstract: There are provided a first belt-clutch mechanism switching power transmission to a first large-diameter pulley, and, at the same time, a second belt clutch mechanism switching power transmission to a second large-diameter pulley, and a first and a second belt clutch mechanism are provided with a first and a second arm members, tension clutch pulleys installed at point portions of these arm members, and actuators which rotate a first and a second arm members in such a way that a position at which a first no-end belt is wound on the first large-diameter pulley is switched to a position at which winding is avoided, and, at the same time, a position at which a second no-end belt is wound on a second large-diameter pulley is switched to a position at which winding is avoided.

Abstract: There are provided a first belt-clutch mechanism switching power transmission to a first large-diameter pulley, and, at the same time, a second belt clutch mechanism switching power transmission to a second large-diameter pulley, and a first and a second belt clutch mechanism are provided with a first and a second arm members, tension clutch pulleys installed at point portions of these arm members, and actuators which rotate a first and a second arm members in such a way that a position at which a first no-end belt is wound on the first large-diameter pulley is switched to a position at which winding is avoided, and, at the same time, a position at which a second no-end belt is wound on a second large-diameter pulley is switched to a position at which winding is avoided.

Abstract: In a rice huller, a first small-diameter pulley and a second large-diameter pulley are attached to a first roll shaft. A first large-diameter pulley and a second small-diameter pulley are attached to a second roll shaft. This configuration makes it possible to switch between a first driving state in which a rice hulling operation is performed by passing and driving a belt between the first small-diameter pulley on the first roll shaft and the first large-diameter pulley on the second roll shaft and a second driving state in which a rice hulling operation is performed by passing and driving a belt between the second large-diameter pulley on the first roll shaft and the second small-diameter pulley on the second roll shaft.

Abstract: In a rice huller, a first small-diameter pulley and a second large-diameter pulley are attached to a first roll shaft. A first large-diameter pulley and a second small-diameter pulley are attached to a second roll shaft. This configuration makes it possible to switch between a first driving state in which a rice hulling operation is performed by passing and driving a belt between the first small-diameter pulley on the first roll shaft and the first large-diameter pulley on the second roll shaft and a second driving state in which a rice hulling operation is performed by passing and driving a belt between the second large-diameter pulley on the first roll shaft and the second small-diameter pulley on the second roll shaft.

Abstract: A husking apparatus for cereals comprises a pair of rolls provided parallel to each other with a clearance therebetween, and an inclined guide chute situated above the rolls. The guide chute slides down cereal grains between the rolls, and the rolls rotate in opposite directions, respectively, to nip and shell the cereal grains therebetween. The guide chute and the rolls are located so that a guide surface of the guide chute is substantially perpendicular to a line connecting the centers of rotational shafts, and that an extension line from the guide surface passes within a range of .+-.10 mm on both sides of a middle point of the clearance between the first and second rolls. The guide surface of the guide chute has such an inclination that the cereal grains spread all over a width of the guide surface in the substantially single layer of a band-like shape and are accelerated up to a speed less than peripheral speeds of the rolls while they slide down along the guide surface.