JOINING METHOD OF SHEET

PURPOSE:To perform adhesion uniformly, stably, safely and at favorable workability without generating deterioration locally, by sticking sheets by heating and melting a joining device composed of a magnetic metal and heat- meltable adhesive agent by making use of an induction heating device. CONSTITUTION:The insides of end parts of synthetic resin sheets, 1, 2 are joined together vertically, between which a laminated body 6 obtained by laminating in order an adhesive agent 3, metallic plate 4 and adhesive agent 5 is placed. The sheets 1, 2 are joined to each other by heating and melting the adhesive agents 3, 5 of the laminated body 6 through the sheet 1 by an induction heating device 7. A notched part obtained by notching the lower part of an end part of the sheet 2 is superposed upon a notched part obtained by notching the upper part of an end part of the sheet 1 so that the top and bottom of both the sheets becomes flush with each other. The similar laminated body 6 is placed between both the notched parts and the laminated body 6 is heated and melted for joining of both the sheets 1, 2. With this construction, as a heating state is constant and free from irregularity, the title sheet whose adhesion is uniform and stable can be obtained.