STRUCTURE OF HIDDEN HINGE, AND HIDDEN HINGE MOUNTING METHOD

PROBLEM TO BE SOLVED: To provide the structure of a hidden hinge and a hidden hinge mounting method enabling one person to safely carry out work alone when mounting a door to a door frame. SOLUTION: The hidden hinge 1 is constituted such that two sets of connecting arms 4a, 4b for connecting the door frame 2 and the door 3 in an openable/closable manner are connected to a vertical rotating shaft 5 and mounted to a pair of adjusting block 6a for the door frame 2 and an adjusting block 6b for the door 3. The connecting arms 4a, 4b are provided with rotating shafts 7 serving as pin support parts at the respective one ends S, and sliding shafts 8 serving as slide support parts at the other ends T. The pair of adjusting blocks 6a, 6b are built in a pair of hinge casings 1a, 1b respectively. The lower end of the hinge casing 1a of the door frame 2 is provided with a claw part 9 formed of a plate spring for preventing the fall of the adjusting block 6a. The lower end of the adjusting block 6a of the door frame 2 is provided with a locking part 10 of projecting shape locked to the claw part 9. COPYRIGHT: (C)2008,JPO&INPIT