Abstract: An attachment fixture includes a pair of first link plates including a connection pin for pivotally connecting an attachment to the boom tip of the power shovel; a pair of second link plates located opposed to the first link plates and including a connection pin for pivotally connecting the second link plates to a front link of the power shovel. Upper portions of the first and second link plates are connected to each other by pivot pins. U-shaped slots are formed at lower portions of the first and second link plates for fastening the first and second link plates to pins of the attachment. The U-shaped slots are located back-to-back with each other. A screw rod is mounted on the attachment fixture to open and close the first and second link plates. The screw rod has a hexagonal screw head. A lock plate is fitted over the screw head. A double ring is mounted on the screw head to prevent the screw rod from being loosened.

Abstract: The present invention relates to a fixture used when an operation attachment of various type is mounted to a power shovel, and the invention provides an attachment fixture capable of being used generally for various power shovels and attachments having different diameters and mounting widths of mounting pins. The attachment fixture comprises a body (34) for connecting an attachment (17) to an arm (11) and a front link (12) of the power shovel, a spacer 35 interposed in a gap formed between the body and the attachment, and/or a spacer (37) interposed in a gap formed between the body and the arm as well as the front link. Each of the spacers (35, 37) is formed into a cylindrical shape, a cylindrical shape having a flange, or a disk-like shape with a center hole (36, 38) having the same diameters as those of mounting pins or those of the connection pins 13, 14 connecting with the power shovel.