Upper tool holder apparatus for press brake and upper tool attachable thereto

摘要

An upper tool holder apparatus (1) for removably supporting an upper tool (9) on an upper table (3) of a press brake includes: a holder body (5) removably attached to the upper table; an upper tool clamp (11) attached to the holder body, for pushing and fixing an upper portion of the upper tool to a support plate (7) provided at a lower portion of the holder body; a clamping force adjusting device (13) for adjusting a clamping force of the upper tool clamp; and a clamp releasing device (15) for releasing the upper tool clamped by the upper tool clamp. In particular, a wedge-shaped member (17) vertically movably provided at a lower portion of the upper tool clamp is formed with a stop portion (17K) engageable with and disengageable from an engage portion (9K) formed in the upper tool (9). Further, an upper tool (9) for a press brake includes: a contact surface (6F) contactable to a lower surface of a support plate (7) provided at a lower portion of a holder body (5) of an upper tool holder apparatus (1) attached to an upper table (3) of a press brake; a slide surface (9S) slidably contactable to a front or rear surface of the support plate; an engage portion (9K) engageable with and disengageable from a stop portion (17K) of a wedge-shaped member (17) vertically movably provided at an lower portion of an upper tool clamp (11) pivotally attached to the upper tool holer apparatus (1); and a work processing portion (9M) for processing a work in cooperation with a lower tool.