| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a construction machine capable of suppressing the rattling of a movable bracket, resulting in reduced noises and vibration. <P>SOLUTION: A supporting shaft 21 is provided in an area on the left side of a fixed bracket 20 and a movable bracket 19, and a lock mechanism 22 is provided in an area on the right side. The lock mechanism 22 has an upper side engaging hole 35b and a lower side engaging hole 36b formed in an upper plate 35 and a lower plate 36 of the fixed bracket 20, an upper side plunger 43U and a lower side plunger 43D stored in a right supporting cylinder body 34R of the movable bracket 19, a cam shaft 44 for moving the lower side plunger 43D downward while moving the upper side plunger 43U upward, an upper side engaging ball 48U to be partially protruded to the upper side of the right supporting cylinder body 34R and seated in the upper side engaging hole 35b with the upward movement of the upper side plunger 43U, and a lower side engaging ball 48D to be partially protruded to the lower side of the right supporting cylinder body 34R and seated in the lower side engaging hole 36b with the downward movement of the lower side plunger 43D. <P>COPYRIGHT: (C)2013,JPO&INPIT |
