DOUBLE-ARM WORKING MACHINE

摘要

A double-arm working machine where left and right front working attachments (A, B) are vertically swingably attached to left and right swing posts (7a, b) provided at the front of an upper rotation body (3) having an operation room (4). The working machine has an interference-prevention control section for creating, based on an angular difference between the front working attachments (A, B) and on a command signal from an operation device, an output signal for rotating the swing posts (7a, b). In the working machine, that range of the angular difference where the working attachments (A, B) can be in contact with each other is defined as a danger-of-interference region and that range of the angular difference which is set contiguous to the danger-of-interference region is defined as a quasi-danger-of-interference region. When the angular difference between the front working attachments (A, B) is in the quasi-danger-of-interference region and the front working attachments (A, B) approach each other, the interference-prevention control section reduces the output signal for rotating the swing posts (7a, b) to reduce the speed of rotation of either of the front working attachments (A, B) that rotates toward the other. Thus, damage to the left and right front working attachments by interference between them can be prevented.