Patent ID: 6656099
Filing Date: 2003-12-02
Classification: B21D,Y10T

Abstract:
A press brake comprising:an upper table provided with an upper tool holder; a lower table provided with a lower tool holder, the lower table being opposed to the upper table in an upward and downward direction and being movable relative to the upper table in the upward and downward directions; an upper guide base extending in a left-right direction and fixed to the upper table so as to protrude in the left-right direction from a side of the upper table; an exchange upper tool support to detachably support a plurality of divided upper tools to be mounted to or demounted from the upper tool holder, the exchange upper tool support being adapted to be positioned on a section of the upper guide base protruding sideways from the upper table; an upper tool exchange device to exchange divided upper tools between the exchange upper tool support and the upper tool holder, the upper tool exchange device being movable in the left-right direction on the upper table; a hook support part provided in the upper tool exchange device and adapted to engage a divided tool mounted on the tool holder or the exchange upper tool support, the hook support part being movable in the upward and downward direction and in a front-rear direction substantially perpendicular to the left-right direction to move the divided tool engaged therewith in the upward and downward direction and in the front-rear direction; a lower guide base extending in the left-right direction and fixed to the lower table so as to protrude in the left-right direction from a side of the lower table; an exchange lower tool support to removably support a plurality of divided lower tools to be mounted to or demounted from the lower table, the exchange lower tool support being adapted to be positioned on a section protruding sideways from the lower guide base; and a lower tool exchange device to exchange divided lower tools between the exchange lower tool support and the lower tool holder, provided free to move in the left-right directions on the lower table.