| 摘要 |
<P>PROBLEM TO BE SOLVED: To enable asphalt mixture to be properly spreaded out to the end of a screw by preventing the flotation of the screw at both right and left end sides when spreading out the asphalt mixture in the state of moving the screw down during construction even in the case that moving the screw connected to a screed via a chain up and down in linkage with the screed moved up and down. <P>SOLUTION: In a rail groove 26a of a guide rail 26 which guides a slider 25 mounted on the side of a screw spreader mechanism when the screw spreader mechanism is moved up and down, a stopper pin 28 is arranged in a freely rising and sinking manner. The stopper pin 28 is mounted at one end of an L-shaped link bracket 29 arranged in a swingable manner, and the other end of the L-shaped link bracket 29 is connected to an operation lever 32 via pull cables 33a, 33b. When the screw 19 is moved down to a predetermined height position, the stopper pin 28 is protruded to the side of the slider 25 with the operation of the operation lever 32 to inhibit the slide of the slider 25 to the upper side. <P>COPYRIGHT: (C)2013,JPO&INPIT |
