SAFETY DEVICE IN PRESS WORKING MACHINE SUCH AS HIGH FREQUENCY WELDER

PROBLEM TO BE SOLVED: To realize a safety device having more safeness in a press working machine such as a high frequency welder. SOLUTION: In the press working machine where a work A is mounted on a receiving stand 1, and is pressed from the upper part thereof by a pressurization member 2, a liftin...

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Hauptverfasser: IGUCHI KENJI, KURAKI ITSUO
Format: Patent
Sprache:eng
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Zusammenfassung:PROBLEM TO BE SOLVED: To realize a safety device having more safeness in a press working machine such as a high frequency welder. SOLUTION: In the press working machine where a work A is mounted on a receiving stand 1, and is pressed from the upper part thereof by a pressurization member 2, a lifting frame 3 including the pressurization member 2 is supported by two kinds of cylinders of a press cylinder 4 and a safety cylinder 5 arranged in series. The safety cylinder 5 performs energization to a direction of lifting the lifting frame 3 to the upper part with a force smaller than the weight of the whole of the lifting frame 3. In this way, even if the pressure cylinder 6 is stretched in a state where a foreign matter B such as the finger of an operator is caught, the safety cylinder 5 acts so as to lift the lifting frame 3 to the upper part, the whole weight of the lifting frame is not applied thereto as well as pressurization force by the press cylinder 6, and safety can be acquired. The change in the stroke of the safety cylinder 5 and the lifting position of the lifting frame 3 are detected, and, by combining them, the control of progressing a safe and efficient operation can be performed. COPYRIGHT: (C)2007,JPO&INPIT