| 摘要 |
PROBLEM TO BE SOLVED: To eliminate the need for brazing and to improve working efficiency by linking connecting rods so as not to bring these rods into contact with each other and turnably connecting wraparound endpieces and temples to each other. SOLUTION: A first turning fulcrum hole 3 is pierced perpendicularly to the horizontal plane of the wraparound endpiece 2 from the outer end of the wraparound endpiece and a second turning fulcrum hole 4 is pierced apart a suitable spacing. A third turning fulcrum hole 5 is pierced perpendicularly to the horizontal plane of the temple 1 from the front end of the temple as well and a fourth turning fulcrum hole 6 is pierced apart a suitable spacing. The wraparound endpiece side second turning fulcrum hole 4 and the temple side third turning fulcrum hole 5 turnably screw two upper and lower connecting rods 7 and 7a. The connecting rod 8 of an approximate hook bolt shape provided with female type clamping parts at both ends is turnably screwed to the wraparound endpiece first turning fulcrum hole 3 and the temple side fourth turning fulcrum hole 6. The front end of the temple 1 abuts on the vicinity (k) of the recessed part in the hook part of the connecting rods 8 of the hook bolt shape in the state of opening the temple l approximately at 90 deg. to suppress the turning beyond the same.
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