(57) Abstract Objective Occurring between closing meting face mutual of casing left and rightIt tries to be able make the ru opening decrease if possible,Having, the airtightness Characteristic in the inside and outside space being divided with the door and the doorAs it can improve, you see and also prospering can improveIt makes the way for folding door it hides and offer the hinge. Constitution Inside casing 20A left and right and 20A it is littleAlso the ku closing one side k of the partner who opposes to the meting face 19,The opening which is formed with the closing meting faces 19 of singingThe gu way the opening hiding component being provided, it becomes.
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