Safety device for press brake

Details Safety device for press brake Safety device for press brake

1978-04-06

1979-09-04

Lanham, C. W.

Metal deforming

With use of control means energized in response to activator...

Sensing tool or tool-linked part

72389, 100 53, B21D 5500

Patent

active

041663691

ABSTRACT:
A safety device for press brakes comprises light projectors mounted on the side of a lower beam of the press brake so as to form a plurality of horizontal light beams extending between a punch and a workpiece, light receivers mounted on the side of the lower beam so as to receive said light beams, and detector means mounted between said light receivers and a safety circuit and adapted to be actuated immediately before the interruption of the light beams when the punch interrupts them with the downward movement of a slide, thereby preventing the stopping of the operation of the press brake.

REFERENCES:
patent: 1962742 (1934-06-01), Jongedyk
patent: 2082210 (1937-06-01), McMaster
patent: 2241556 (1941-05-01), MacMillin
patent: 2311441 (1943-02-01), James
patent: 2798583 (1957-07-01), Jeszka
patent: 3276557 (1966-10-01), Brown
Sheet Metal Industries, Jun. 1977, vol. 54, No. 6, "Twenty-Five Years of Photo-Electric Guarding", by D. G. Harrison, pp. 536-539.
Sheet Metal Industries, Jun. 1977, vol. 54, No. 6, "Infra Red Lightscreens-The Right Approach to Photo-Electric Guards", pp. 550-556.

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