| 摘要 |
PROBLEM TO BE SOLVED: To provide a cylindrical cover which is capable of hermetically covering a columnar body and is not dropped off from the columnar body.SOLUTION: A cylindrical cover 1 includes a front first half cover 111, a front second half cover 112, a rear first half cover 121 and a rear second half cover 122 in half divided cylindrical shape. Both side portions of the front first half cover 111 are locked to both side portions of the front second half cover 112 in a circumferential direction and can be slid with respect to an axis direction, and it is similar between the rear first half cover 121 and the rear second half cover 122. Between the front first half cover 111 and the rear first half cover 121, overlap portions are overlapped in a radial direction, respectively, and it is similar between the front second half cover 112 and the rear second half cover 122. When a rear cover 12 is rotated by 180° in the circumferential direction, between a columnar body 9 and the front second half cover 112, the rear first half cover 121 can be inserted and ejected. |
