| 摘要 |
PROBLEM TO BE SOLVED: To prevent backlash and secure engagement of a mouthpiece of a frame by regulating the positional relation of frames themselves when closing a frame for a seal case. SOLUTION: The frame 1 for a seal case has a structure so as to couple an upper side frame 2 and a lower side frame 3 by a hinge 6 arranged at one side fringe of the same and hold the closed state by a mouthpiece 7 arranged at the other side fringe of the same. In the frame 1 for the seal case, convex parts 8, 9 and concave parts 10, 11 are arranged at positions facing each other of the upper side frame 2 and the lower side frame 3. The convex parts 8, 9 and the concave parts 10, 11 engage with each other and regulate the positional relation of the upper side frame 2 and the lower side frame 3 when closing the upper side frame 2 and the lower side frame 3. Thus, the upper side frame 2 and the lower side frame 3 are prevented from the backlash in a longitudinal direction and the mouthpiece 7 is prevented from becoming easily to come off. COPYRIGHT: (C)2011,JPO&INPIT
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