| 摘要 |
PROBLEM TO BE SOLVED: To increase the strength of a fixedly coupled portion in which an angular string to which a lower hinge is coupled is fixedly coupled to a front plate, suppress deformation of a box body, and enable suppression of inclination of a door.SOLUTION: Reinforcement members are arranged on upper surfaces of front portions of a pair of strings, respectively, a flange 13a is formed to be bent on a front end of each of these reinforcement members to have surface contact with a rear surface of a front plate 6 and to be fixed to the rear surface thereof, the front plate 6 is held between the flange 13a and a lower flange 12c on a hinge side, and the lower hinge 12c, the front plate 6, and the flange 13a of each reinforcement member are fastened together by a screw 34. Furthermore, an auxiliary member 15 is provided to abut on a box inner side surface 18g of the front portion of the string 18a and a rear surface of the flange 13a of each reinforcement member, and the auxiliary member 15 is welded to the box inner side surface 18g of the string 18a and the rear surface of the flange 13a of the reinforcement member. |
