| 摘要 |
Cartridge reloading presses wherein either a turret carrying multiple dies or a turret carrying multiple cartridges is caused to index rotationally relative to the axis of a vertically reciprocable ram. The indexing mechanism includes a ratchet element having a circular array of downwardly pointed teeth surrounding a vertical hole. This element is fixed to the ram. A hexagon rod having a nominal 120 degree twist near its lower end fits through said hole with clearance. A plastic ratchet element having upwardly pointed complementary teeth surrounding a hexagon hole fits snugly on the hexagon rod. When the ram moves upwardly the two ratchet elements are disengaged so the rod does not turn. During the ram downstroke, the ratchet elements engage while the plastic element is still on the untwisted part of the rod. Near the end of the downstroke, the engaged and locked plastic element runs onto the twist, causing the rod to rotate to thereby rotate a turret engaged therewith.
|
