Punch for punch press

Claim 2

A punch tool for a punch press provided with a plurality of striking positions at which a striker is selectively placed for punching a workpiece, said punch press also being provided with a tool support means for supporting said punch tool, said punch tool comprising: a punch holder having a key way, said punch holder being detachably inserted into a punch installation portion formed in the tool support means and held in place by a key attached to said support means; a pair of punch bodies so supported on said punch holder as to be independently movable in the vertical direction, said pair of punch bodies so located as to be concurrently aligned with a pair of respective striking positions, said punch bodies each having a keyway, said keyways aligned to engage a single key fixedly attached to said punch holder; a pair of shearing blade portions formed on the lower ends of the pair of punch bodies, respectively, said pair of shearing blade portions having elongated configurations so guided by guide means as to have their elongated directions extending perpendicular to one another; and a die detachably inserted into a die installation portion formed in the tool support means, the die having a pair of die holes corresponding to the pair of shearing blade portions.

Claim 3

The punch tool of claim 1, wherein said punch holder includes a bottom end section, further comprising: a sheet retainer formed on the bottom end section of the punch holder, for securely retaining the workpiece to be punched by either one of the shearing blade portions.

Claim 4

The punch tool of claim 2, wherein one of the shearing blade portions having an elongated configuration is so oriented that the elongation direction of said one shearing blade portion points at a central portion of the other of said shearing blade portions.

Claim 5

The punch tool of claim 2, wherein the extending directions of the pair of shearing blade portions are parallel respectively to X and Y directions along which the workpiece is moved by a workpiece positioning device that is provided on the punch press.

Claim 6

The punch tool of claim 1, wherein one of the shearing blade portions having an elongated configuration is so oriented that the elongation direction of said one shearing blade portion points at a central portion of the other of said shearing blade portions.

Claim 7

The punch tool of claim 5, wherein the extending directions of the pair of shearing blade portions are parallel respectively to X and Y directions along which the workpiece is moved by a workpiece positioning device that is provided on the punch press.

Claim 8

The punch tool of claim 1, wherein the extending directions of the pair of shearing blade portions are parallel respectively to X and Y directions along which the workpiece is moved by a workpiece positioning device that is provided on the punch press.

Claim 9

A punch press for punching holes in a generally horizontal workpiece, said punch press comprising: a frame; a plurality of striking positions at which a striker is selectively placed for striking a punch tool; a tool support means formed with a punch installation portion and a die installation portion for supporting a punch-and-die set and aligning the said punch-and-die set with one of the striking positions; at least one punch-and-die set including a punch holder with guide means detachably insertable into the punch installation portion in a vertically movable manner, a pair of punch bodies so installed on said punch holder as to be independently movable in the vertical direction, said punch bodies each having a keyway, said keyways aligned to engage a single key fixedly attached to said punch holder, said pair of punch bodies so located as to be concurrently aligned with a pair of respective striking positions, a pair of shearing blade portions formed on the lower ends of the pair of punch bodies respectively, said pair of shearing blade portions having elongated configurations so guided by guide means as to have their elongated directions crossing one another at the central portion of either one of the shearing blade portions at a right angle, and a die with guide means, detachably inserted into said die installation portion, said die having a pair of die holes corresponding to the pair of shearing blade portions respectively.

Claim 10

A punch press for punching holes in a generally horizontal workpiece, said punch press comprising: a frame; a plurality of striking positions at which a striker is selectively placed for striking a punch tool; a tool support means formed with a punch installation portion and a die installation portion for supporting a punch-and-die set and aligning the said punch-and-die set with one of the striking positions; at least one punch-and-die set including a punch holder with guide means detachably insertable into the punch installation portion in a vertically movable manner, a pair of punch bodies so installed on said punch holder as to be independently movable in the vertical direction, said punch bodies each having a keyway, said keyways aligned to engage a single key fixedly attached to said punch holder, said pair of punch bodies so located as to be concurrently aligned with a pair of respective striking positions, a pair of shearing blade portions formed on the lower ends of the pair of punch bodies respectively, said pair of shearing blade portions having elongated configurations so guided by guide means as to have their elongated directions crossing one another at the central portion of either one of the shearing blade portions at a right angle, and a die with guide means, detachably inserted into said die installation portion, said die having a pair of die holes corresponding to the pair of shearing blade portions respectively.