| 摘要 |
PROBLEM TO BE SOLVED: To mount a protective cover with a simplified structure dealing flexibly even in the case where a bent portion of a refrigerant piping disposed on a wall surface of a building is different in a bent angle thereof for each building, and an angle of a building at a corner thereof is not a predetermined value such as a rectangle. SOLUTION: The protective cover comprises a bent frame structure 1 in which a hollow frame section 11 and a hollow frame section 21 are integrally formed to be coupled through a hinge. The flex frame 1 becomes displaceable in its degree of flex by rotating both hollow frames 11, 21 around a hinge serving as a rotation center such that both frames are mutually overlapped. Herein, both hollow frames 11, 21 include an engagement section composed of an elongated hole 16 and an engagement pawl 26.
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