| 摘要 |
PROBLEM TO BE SOLVED: To provide a puncture and burst preventing structure for a tire. SOLUTION: A tire contains a jointed annular spare tire assembled from spare tire connection sections. The spare tire connection sections have a plurality of longitudinal supports between a plurality of inserts, have separate top covers on them, and have bottom plates and covers on bottom surfaces. The bottom plate has a plurality of spaced active pin holes at both ends. The inserts have a plurality of locking holes in a rail tube and have pressers from which an insertion rod is projected in the rail tube. When a tensioner extends to press the pressers and project the insertion rods from both ends of the rail tube, a projected locking portion of one presser engages with one locking hole in the rail tube. The plurality of spare tire connection sections are fitted together and insertion columns are inserted in the active pin holes to form the foldable jointed annular spare tire.
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