| 摘要 |
PROBLEM TO BE SOLVED: To attain a small clearance dimension, and assembling and repairing in the form of general purpose. SOLUTION: A door frame 1 involves undercut guide grooves 10, 11 one by one at the first edge part and the second edge part facing the first edge part, and a door external wall 2 involves undercut guide rails 12, 13 which are disposed so as to meet the guide grooves and be engaged with the insides of the guide grooves, at both the edge parts. The door external wall is fixed inside the guide grooves 10, 11 so as to integrate their shapes in a lateral direction with regard to the longitudinal direction of the guide grooves 10, 11. The door frame 1 involves a retaining groove at the third edge part extending laterally to both the edge parts, and an engaging groove at the fourth edge part facing the third edge part. The door external wall involves a retaining (engaging) rail which is disposed so as to meet the retaining (engaging) groove and engages in the retaining (engaging) groove, at the third (the fourth) edge part. The door external wall is capable of being inserted by the guide rail in the guide groove of the door frame in the longitudinal direction until the retaining rail goes into the retaining groove, and the engaging rail engages with the inside of the engaging groove. |
