Zigzag blanking device in a press

Claim 2

A zigzag blanking device in a press having a crank shaft and of the type in which a punch holder and a die holder are arranged to reciprocally move in unison in traverse directions with respect to an intermittently advancing strip of material to be punched out, character-ized in that a planet gear is mounted on a first rotary shaft means which has imparted thereto rotational movement at a predetermined ratio to the rotation of the crank shaft of said press; a stationary sun gear disposed to be in engagement with said planet gear; a first eccentric pin integrally formed with said planet gear; a reciprocally movable member having an elongated groove for slidably receiving said first eccentric pin; a rack operatively connected to said reciprocally movable member and a pinion mounted on one end of a second rotary shaft means for meshing with said rack, said second rotary shaft means having a rotary disc secured to its other end, the rotary disc being provided with a second eccentric pin, and said die holder having an extension provided with a further elongated groove said further elongated groove having a slidable member disposed therein and provided with means for loosely receiving said second eccentric pin.

Claim 3

The zigzag blanking device in a press as set forth in claim 1, in which the eccentricity of said second eccentric pin provided with said rotary disc is adjustable.

Claim 4

A zigzag blanking device in a press comprising a horizontally reciprocal die holder, a vertically and horizontally reciprocal punch holder operatively connected to said die holder and having an extension provided on the underside with an elongated groove, said punch holder being movable independent of said die holder in its vertical movement and movable along with the die holder in its horizontal movement, guide means along which said die and punch holders reciprocally move in their horizontal movement, a vertical rotary shaft having at the upper end a rotary disc provided with a threaded eccentric pin which is slidably received in said elongated groove in the die holder extension, an adjusting screw mounted on said rotary disc in threaded engagement with said eccentric pin so as to adjust the eccentricity of the pin, a pinion mounted on said rotary shaft, a rack slidably mounted in the frame of said press for engagement with said pinion, a reciprocal member operatively connected to said rack and having an elongated groove on the underside, a pair of stationary guide members mounted in said frame for guiding said reciprocal member therealong, a slidable member slidably received in said elongated groove in the reciprocal member, a planet gear having a further eccentric pin integrally formed therewith, said further eccentric pin being loosely received in said slidable member, a stationary sun gear in engagement with said planet gear and having a shaft, said planet gear revolving about said sun gear while rotating about its own axis, a larger gear rotatably mounted on a stationary shaft mounted in said frame and bearing said shaft of the planet gear and smaller gear mounted a second rotary shaft to be driven by a drive shaft of said press in engagemnt with said larger gear.

Claim 5

A zigzag blanking device in a press comprising a horizontally reciprocal die holder, a vertically and horizontally reciprocal punch holder operatively connected to said die holder and having an extension provided on the underside with an elongated groove, said punch holder being movable independent of said die holder in its vertical movement and movable along with the die holder in its horizontal movement, guide means along which said die and punch holders reciprocally move in their horizontal movement, a vertical rotary shaft having at the upper end a rotary disc provided with a threaded eccentric pin which is slidably received in said elongated groove in the die holder extension, an adjusting screw mounted on said rotary disc in threaded engagement with said eccentric pin so as to adjust the eccentricity of the pin, a pinion mounted on said rotary shaft, a rack slidably mounted in the frame of said press for engagement with said pinion, a reciprocal member operatively connected to said rack and having an elongated groove on the underside, a pair of stationary guide members mounted in said frame for guiding said reciprocal member therealong, a slidable member slidably received in said elongated groove in the reciprocal member, a planet gear having a further eccentric pin integrally formed therewith, said further eccentric pin being loosely received in said slidable member, a stationary sun gear in engagement with said planet gear and having a shaft, said planet gear revolving about said sun gear while rotating about its own axis, a larger gear rotatably mounted on a stationary shaft mounted in said frame and bearing said shaft of the planet gear and smaller gear mounted a second rotary shaft to be driven by a drive shaft of said press in engagemnt with said larger gear.

Claim 6

The zigzag blanking device in a press as set forth in claim 3, in which the diameter ratio of said sun gear to said planet gear is 2 to 1.

Claim 7

The zigzag blanking device in a press as set forth in claim 3, in which said horizontal movement of the die and punch holders is in a direction at right angles to the longitudinal axis of an intermittently advancing strip material to be punched out in said press.

Claim 8

The zigzag blanking device in a press as set forth in claim 3, in which said horizontal movement of the die and punch holders is intermittent.