Press blocking and control system
AssigneeStarboard Industries, Inc.
InventorsMaurice James Good, Benjamin W. Colman
Life of this patent
Estimating the term…
Abstract
The press blocking and control system of this invention embodies a press ram blocking apparatus and circuitry and control means for moving a ram blocking member into ram stopping position thereunder upon the occurrence of one or more events justifying blocking of the pressed ram, to prevent injury or damage to personnel and equipment which would expectedly result from inadvertence, error or accident. The control circuitry for the blocking device is connected to and in association with conventional press control circuitry for the press ram actuating mechanism. For normal press operation, the ram blocking member is retained in retracted position by its actuating apparatus and control circuitry.
Claims38
In a press ram blocking and control system for a press having
- a frame supporting a movable ram-affixed upper tool holding bolster plate and a lower die plate,
- means for reciprocatingly moving said ram-affixed upper bolster plate relative to said lower die plate,
- and press control circuitry to actuate and control said means to reciprocatingly move a frame supported ram,
- the improvement comprising in combination
- a solenoid operated fluid valve,
- a fluid cylinder communicating with said valve and having a reciprocatingly movable piston and piston rod actuated by operation of said solenoid and valve,
- means securing said cylinder and valve to said press frame,
- a reciprocatingly movable blocking member for said upper bolster plate affixed to the distal end portion of said piston rod projecting from said fluid cylinder,
- solenoid actuating and control means electrically connected to said valve operating solenoid and mounted on said press frame for actuation by said means for moving said upper bolster plate,
- and solenoid-connected and -actuating circuitry connected and responsive to said solenoid actuating and control means upon a malfunction in normal press operation,
- whereby said blocking member is insertable between said movable upper bolster plate and said lower die plate in response to solenoid operated valve actuation of said fluid cylinder piston and piston rod upon the occurrence of a malfunction in normal press operation.
In a press blocking and control system for a press having
- a frame supporting a movable upper ram-affixed tool holding bolster plate and a lower die plate,
- means for reciprocatingly moving said ram-affixed upper bolster plate relative to said lower die plate,
- and press control circuitry to actuate and control said means to reciprocatingly move a frame supported ram,
- the improvement comprising in combination
- a solenoid comprising a housing, a coil and a pin axially movable in said coil,
- said solenoid pin having at least one end portion thereof projecting beyond an end of said housing,
- means securing said solenoid on and to said press frame, a reciprocatingly movable blocking member for said upper bolster plate connected to said projecting end portion of said solenoid pin,
- solenoid actuating and control means electrically connected to said solenoid coil and mounted on said press frame for actuation by triggering means on said ram-affixed bolster plate,
- and solenoid-connected and -actuating circuitry connected and responsive to said solenoid actuating and control means upon a malfunction in normal press operation,
- whereby said blocking member is insertable between said movable upper bolster plate and said lower die plate in response to solenoid coil actuation of said solenoid pin upon the occurrence of a malfunction in normal press operation.
Dependencies are inferred from the claim text.