US Patent No. 10,166,683

WORKPIECE CONVEYING APPARATUS FOR A PRESSING MACHINE


Patent No. 10,166,683
Issue Date January 01, 2019
Title Workpiece Conveying Apparatus For A Pressing Machine
Inventorship Keisuke Takeda, Kanagawa (JP)
Assignee Aida Engineering, Ltd., Kanagawa (JP)

Claim of US Patent No. 10,166,683

1. A workpiece conveying apparatus for a pressing machine, comprising:two robots each comprising:
a raising and lowering frame supported on a stationary frame so as to be movable in a Z-axis direction being an up-and-down direction, the stationary frame being mounted to extend along a Y-axis direction that is a width direction orthogonal to an X-axis direction being a workpiece conveying direction of a passage space for conveying a workpiece;
a first arm supported at a proximal end side thereof on the raising and lowering frame through a first joint so as to be freely rotatable within a horizontal plane;
a second arm supported at a proximal end side thereof on a distal end side of the first arm through a second joint so as to be freely rotatable within the horizontal plane;
a first arm driving mechanism configured to drive the first arm to rotate about the first joint with respect to the raising and lowering frame; and
a second arm driving mechanism configured to drive the second arm to rotate about the second joint with respect to the first arm;
a raising and lowering mechanism configured to enable the two robots to move in the Z-axis direction;
a cross arm configured to couple distal ends of second arms of the two robots so as to be freely rotatable within the horizontal plane through a third joint;
a workpiece holding unit removably connected to the cross arm and configured to releasably hold the workpiece through a tool holder;
a shifting device mounted to the cross arm and configured to move, by a shifting movement drive source, a drive-side shifting member linearly along a longitudinal direction of the cross arm relative to the cross arm; and
a sliding device mounted to the workpiece holding unit and configured to move, under a state in which the workpiece holding unit is connected to the cross arm, the tool holder in a Y-axis direction by an operation of causing a driven-side shifting member corresponding to the drive-side shifting member to be driven by the drive-side shifting member.