Patent ID: 6056021
Filing Date: 2000-05-02
Classification: B21D,F24F

Abstract:
An assembly tool for assembling a joint structure of a duct comprising at least two plate members configured substantially in orthogonal relation, the first plate member having the end of the orthogonal portion thereof bent substantially at right angle in conformance with said orthogonal relation, the second plate member having a U-shaped groove formed at the forward end portion thereof to accommodate the bent portion of the first plate member, in which a guide rail protruding from the outer surface of the second plate member at 90 degrees or less with respect to the outer surface is formed along the length of the duct on the side of the second plate member spaced from said U-shaped groove,characterized in that said assembly tool includes an engaging portion for engaging said protruding guide rail, a pressure portion arranged adjacent said second plate member side by a distance equivalent to the length from said engaging portion to a coupling corner of said first plate member, and a hand-holding portion arranged spaced from said engaging portion.