초록 ▼

Apparatus is disclosed for supplying and installing plastic expansion rivets with breakaway mandrels in holes in a workpiece. It comprises a hand-held, trigger actuated, pneumatically-operated installation tool; a rivet-supply mechanism for supply rivets one-by-one to the tool on a timely basis; and

Apparatus is disclosed for supplying and installing plastic expansion rivets with breakaway mandrels in holes in a workpiece. It comprises a hand-held, trigger actuated, pneumatically-operated installation tool; a rivet-supply mechanism for supply rivets one-by-one to the tool on a timely basis; and a vacuum-operated, mandrel-removal mechanism for removing broken away mandrels from the tool. The installation tool has a hollow barrel with a nose piece at its working end for receiving and releasably holding each rivet delivered thereto. Two piston assemblies are slidably mounted in the hollow barrel: one maintains the rivet body stationary against the workpiece and the other has jaws thereon for gripping and pulling on the rivet mandrel to expand the rivet body and break away the mandrel. The hollow barrel also contains a vacuum tube through which broken-away mandrels are expelled. A control system comprising pilot pressure operated control valves supplies compressed air to the tool to effect sequential movement of the piston assemblies. Other control valves in the control system supply air to operate the rivet supply mechanism. The various control valves are operated in proper timed sequence by a pneumatic logic circuit which is responsive to actuation of a trigger-operated valve on the tool.

대표청구항 ▼

Apparatus for supplying and installing expansion rivets, each of which has an expandable body and a relatively movable breakaway mandrel, said apparatus comprising: an installation tool having a housing with a bore therethrough and comprising rivet holding means on said housing for releasably holdin

Apparatus for supplying and installing expansion rivets, each of which has an expandable body and a relatively movable breakaway mandrel, said apparatus comprising: an installation tool having a housing with a bore therethrough and comprising rivet holding means on said housing for releasably holding a rivet exteriorily of said bore, a pair of relatively movable components in said bore, each component comprising a hollow piston and a tube and being independently movable between an extended position and a retracted position, the tube of one component slidably receiving the tube of the other component, the tube of said other component having jaws thereon, and a mandrel-receiving tube in said bore and slidably received in the tube of said other component; supply means operable to supply an expansion rivet through said bore to said rivet holding means on said tool and exteriorily of said bore; mandrel removal means operable to remove a broken-away mandrel from said mandrel-receiving tube on said tool; and means for effecting: movement of both said components to extended position wherein the tube of said one component engages the body of a rivet in said rivet holding means and wherein the jaws of said other component releasably grip the mandrel of the rivet; movement of said other component to its retracted position to effect movement of said mandrel, expansion of said rivet body and break away of said mandrel; movement of said one component to its retracted position whereby its tube operates said jaws to effect release of the broken-away mandrel from said other component into said mandrel-receiving tube for removal by said mandrel removal means; movement of both components back to retracted position; and operation of supply means to supply a rivet through said bore to said rivet holding means before said both components return to extended position.