| 摘要 |
An upper tool for a press brake is removably attached on an upper tool holding device mounted on an upper table of the press brake, and includes a wedge portion having a contact surface brought into contact with a lower surface of a support plate provided on a holder body of the upper tool holding device. A slide surface is slidably brought into contact with any of front and rear surfaces of the support plate, and a clamp surface is brought into pressure contact with a pressing-down and fixing section of an upper-tool pressing-down and fixing member of the upper tool holding device. A work processing portion processes a workpiece in cooperation with a lower tool. Further, an upper tool holding device for a press brake, for removably mounting and supporting an upper tool on an upper table of the press brake, includes a holder body attached to the upper table. A support plate is provided on a lower portion of the holder body, and an upper-tool pressing-down and fixing member is attached to the holder body, for fixedly fastening an upper portion of an upper tool in cooperation with the support plate. A clamp force adjusting device adjusts clamping force of the upper-tool pressing-down and fixing member; and a clamp releasing device releases the clamped upper tool.
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