Cutting – Operation controlled by detector means responsive to work – Actuation of tool controlled in response to work-sensing means
Patent
1989-12-20
1991-01-29
Phan, Hien H.
Cutting
Operation controlled by detector means responsive to work
Actuation of tool controlled in response to work-sensing means
83550, 83628, 83633, 83687, B26D 516, B26D 538
Patent
active
049878115
ABSTRACT:
A pair of guide bores in an electric punch support a pair of punching blocks aligned with, and movable into, respective punching holes in a main frame. Two operation arms are pivoted on respective holders and each is connected to one punching block to impart vertical motion thereto. Each operation arm includes a longitudinal guide groove therein. A pair of operation pins are driven in circular paths within the guide grooves to reciprocate the operation arms about their pivots. In the quiescent condition, the one of the guide pins lies at the end of its guide groove, whereas the other guide pin lies about in the middle of its guide groove. A guide concavity at the end of the guide grooves accepts its respective operation pin, whereby the associated operation arm rests at a different rotational position than it would if the guide concavity were omitted. A spring provides a restoring force on the punching block associated with the guide concavity. The guide grooves and holders may be positioned at selectable spacings. A reversing switch permits reversing the direction of the circular paths to clear jams.
REFERENCES:
patent: 2327646 (1943-08-01), Hutchinson
patent: 4079647 (1978-03-01), Elder et al.
patent: 4579029 (1986-04-01), Sunuga
patent: 4622793 (1986-11-01), Oki
patent: 4833958 (1989-05-01), Abildgaard et al.
Ikarashi Masayoshi
Okazaki Kunihati
Maruzen Kabushiki Kaisha
Peterson Ken
Phan Hien H.
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