Method and devices for safety for mechanical presses

Details Method and devices for safety for mechanical presses Method and devices for safety for mechanical presses

1977-12-28

1980-02-26

Herrmann, Allan D.

192 clutches and power-stop control

Stop mechanism

Drive release and brake

100 53, 192 485, 192 85A, 192129B, F16D 2108, F16D 6702, F16P 300

Patent

active

041901436

ABSTRACT:
This disclosure relates to a method and apparatus for facilitating safe operation of mechanical presses. The press includes a press ram mounted on a crank shaft and adapted for reciprocatory movement along a vertical path between uppermost and lowermost points on the path. A motor is provided for turning the crank shaft through 360 degrees rotation including an upper dead center position. The press further includes main clutch and brake means for disconnecting the crank shaft from the motor and stopping the ram at the uppermost point of its path of travel after completion of a stroking cycle. At this point the crank shaft is at its upper dead center position. The press also includes an auxiliary clutch which is operatively connected in series with the main clutch and which is normally engaged for transmitting power from the motor to the crank shaft. The auxiliary clutch will be automatically disengaged if the crank shaft unintentionally rotates past its upper dead center position upon completion of a stroking cycle of the ram, thereby preventing a hazardous double stroke upon failure of the main clutch or the like.

REFERENCES:
patent: 3113653 (1963-12-01), Volkovitsky
patent: 3504774 (1970-04-01), Rode
patent: 3509976 (1970-05-01), Coon

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