Safety device for arbor of fastening machine

Details Safety device for arbor of fastening machine Safety device for arbor of fastening machine

1984-09-20

1986-05-06

Briggs, William R.

Metal working

Means to assemble or disassemble

With randomly actuated stopping or disabling means

83543, 192134, 192150, B23Q 1100

Patent

active

045862486

ABSTRACT:
The present invention relates to a safety device for an upper die arbor of a fastening machine having a driving sleeve, an upper mold mandrel, a copper sleeve, and a steel sleeve. The driving sleeve has a roller in each of four holes. A flange is formed on the circumference of upper mold mandrel. Due to the positions of the rollers with respect to the flange, and the difference between inside diameters of quadrangular slots formed in the copper sleeve and steel sleeve, when the upper mold mandrel moves downward and is blocked by an undesired object, the rollers pass over the flange and do not exert the normal forming force on the upper mold mandrel. Therefore, the upper mold mandrel does not exert the mechanical crushing force in order to prevent injury to the object.

REFERENCES:
patent: 1684296 (1928-09-01), Brodsky
patent: 2259257 (1941-10-01), MacBlane
patent: 2578546 (1951-12-01), Honener
patent: 2856999 (1958-10-01), Wilhelm
patent: 2928451 (1960-03-01), Taylor
patent: 4391358 (1983-07-01), Haeger

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