| 摘要 |
PURPOSE:To perform inspection by a simple mechanism by opening and closing respective end parts of an oil passage by two couples of arms supported pivotally on a couple of fixed shafts through a rotary sleeve. CONSTITUTION:The oil passage 3a of a journal part 1 and the oil passage 3b of an adjacent pin part 2 are linked together by a slanting oil passage 3c which connect their center parts together. Then, the couple of fixed shafts 5a and 5b are provided successively between upper end parts of a frame in parallel to the axis of a crank shaft. Then, the 1st arm 7a corresponding to the left side part of the journal part 1 and the 2nd arm 8a corresponding to the left side of the pin part 2 are supported pivotally on one fixed shaft 5a through the common rotary sleeve 6a. Further, the 1st arm 7b corresponding to the right side part of the journal part 1 and the 2nd arm 8b corresponding to the right side part of the pin part 2 are supported pivotally on the other fixed shaft 5b through a sleeve 6b. A presser 13 is provided at the lower end parts of the arms 7a and 7b and fitted around a rod 14 so thatit is axially slidable. The rod 14 is connected to an air source 18 and air supplied into the presser 13 is supplied to the oil passage 3a. |
