| 摘要 |
PROBLEM TO BE SOLVED: To provide a joint structure of a box-shaped roof pipe, which enables smooth dismantlement of the corner unit box-shaped roof pipe arranged in a joint corner between crosswise and lengthwise roof rows. SOLUTION: Engagement of a pair of outside engaging pieces 18a and 18b of a joint 16 of the corner box-shaped roof pipe 11a with a pair of inside engaging pieces 19a and 19b is constituted as a combination of engagement using an engaging piece 20 formed in a flat cross-sectional shape, and engagement using an engaging piece 21 formed in a triangular cross-sectional shape and having an oblique side 21a along the diagonal direction of the corner box-shaped roof pipe 11a. The engagement using the engaging piece 21 formed in the triangular cross-sectional shape, and the engagement using the engaging piece 20 formed in the flat cross-sectional shape are alternately arranged by means of the joint 16 between the corner box-shaped roof pipe 11a and a lateral box-shaped roof pipe 11b, and the joint 16 between the corner box-shaped roof pipe 11a and a lower box-shaped roof pipe 11c, so as not to interfere with obliquely upward movement toward a diagonal-direction outside Y from a joint corner of the corner box-shaped roof pipe 11a. COPYRIGHT: (C)2011,JPO&INPIT
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