| 摘要 |
PROBLEM TO BE SOLVED: To provide a pipe joint structure capable of obtaining large connecting strength, facilitating connection at a job site, and reducing a cost therefor. SOLUTION: The pipe joint structure comprises a joint body 1; a pair of sleeves 3, 3 equipped between the joint body 1 and a connecting pipes 2, 2; and a pair of water cut-off packings 4, 4 equipped between the joint body 1 and a connecting pipes 2, 2. In an inner end side of the sleeve 3, a locking leg 31 which has a locking end 32 formed on the connecting pipe 2 with bending a tip portion diametrically inward and locked with a locking groove 21 from the circumferencial outside to a locking groove 21 formed on the connecting pipe 2 by bending a tip end portion to a diametrical inside. The joint body 1 is provided with fitting grooves 11, 11 formed in an inner circumferencial direction in which the water cut-off packings 4, 4 are fitted, a restricting step portions 12, 12 formed in the inner circumferencial direction so a to abut on the outer side of the locking end 32 and restrict the movement of the locking end 32 inward, and relieving groove 13, 13 formed in the inner circumferencial direction so as to guide/allow the deformation of the locking legs 31, 31 in the circumferencial outward direction and form a locking state in a space with a deformed part 311.
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