| 摘要 |
A device for applying a working or assembling process to an article at an appropriately selected position as temporarily mounted to a supporting plate through a hole formed therein, having a housing of a generally twofold tubular structure, an annular piston disposed in an annular space in said housing and adapted to be axially reciprocated by selective supply or exhaust of pressure fluid, and a plurality of cotter members arranged in the tubular housing so as to be selectively driven out of the tubular housing radially outwardly as driven by the annular piston by way of a wedging engagement with the annular piston, so that the cotter members are driven against the inner peripheral wall surface of the hole of the supporting plate with very high force available by the wedging engagement.
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