| 摘要 |
PROBLEM TO BE SOLVED: To determine the interval of a pair of fingers easily with high accuracy when the size of a board is altered by provided a fixing plate, to be fixed with fingers, with an adjusting plate such that it can be secured at a specified position in the sliding direction. SOLUTION: When a board 31, shown by a solid line, is changed to a board 31a having smaller breadthwise dimensions, a first fixing plate 16 is slid to the base end side of a first arm body 3 and a second fixing plate 17 is slid to the forward end side of a second arm body 4. More specifically, the first fixing plate 16 is slid until it abuts, on the rear side thereof, against a retract pin 26 and secured thereat whereas the second fixing plate 17 is advanced until a second adjusting plate 22 abuts against an advance pin 25. Consequently, the interval between first and second fingers 28, 29 provided for the fixing plates 16, 17 can be set substantially equal to the breadthwise dimension of the board 31a. Fixing position of the fixing plate 16, 17 is previously adjusted with respect to the adjusting plate 21, 22. |
