| 摘要 |
A pneumatically powered riveting tool for setting breakstem rivets has a riveting head (12) having means (26, 36, 38) for pulling a rivet stem so as to set the rivet and break off a tail part (46) of the stem, and an air injector (52, 50) which, when supplied with compressed air via a hose (76) and passages (78, 80, 82, 84, 64) induces a secondary flow of air whereby the broken off stem tails (46) are entrained so as to expel the stem tails from the riveting head (12) into a container (14) which is removably attached to the riveting head. A safety valve (94, 96) operates to disable the air injector (52, 50) and thus prevent ejection of stem tails when the container (14) is not in position to receive them. The safety valve operates to reduce the flow of air to the air injector (52, 50) either by cutting off the supply of air to the injector (52, 50) or by allowing the air supply to bleed away to atmosphere via the passage (84) before reaching the injector. <IMAGE> |
