Elongated-member-driving apparatus – With means to head member – Common tool to drive and head member
Patent
1977-10-17
1978-10-31
Lake, Roy
Elongated-member-driving apparatus
With means to head member
Common tool to drive and head member
29 34B, 2924354, B21J 1510
Patent
active
041229886
ABSTRACT:
A pierce rivet machine for simultaneously pierce riveting sheets of material to the opposing flanges of a channel shaped member having a first and a second pierce rivet driver, a first and a second pierce rivet holder for respectively holding rivets for said first and second pierce rivet drivers, and a first and a second anvil each respectively positioned to function in conjunction with the operation of said first and second pierce rivet drivers. The first and second pierce rivet drivers are positioned diametrically opposed to each other. A drive rod supports each pierce rivet driver and attached to the end of the drive rod is a link member and bellcrank for driving the drive rod along an axial reciprocating path. A tie bar has its ends pivotally attached to the bellcranks causing the drive rods to be simultaneously actuated. One of the bellcranks has its end pivotally attached to an air cylinder motor that operates the machine. The first and second anvils are supported by a first and a second anvil arm each of which has one end pivotally connected to an anvil block assembly. The anvil block assembly has a back-up plate that is driven into and out of position between the first and the second anvil support arms during the pierce riveting operation. The structure for driving the back-up plate back and forth comprises a back-up plate guide, an elongated curved slot in the tie bar, and a pin mounted in the top of the back-up plate guide that is captured in the elongated curved slot. The pierce rivet holders are each supported by an actuator rod that travels along an axial reciprocating path during the pierce rivet operation. Each rivet holder also has a guide with a link member attached between the actuator and the guide to prevent the rivet holder from turning during the pierce rivet operation. The pierce rivet machine also has structure for automatically feeding rivets into the first and second rivet holders.
REFERENCES:
patent: 2227402 (1940-12-01), Ward
patent: 3559269 (1971-02-01), Schmitt et al.
Bell Paul A.
Gilliam Frank D.
Lake Roy
Rohr Industries, Inc.
Schlesinger Patrick J.
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