| 摘要 |
PROBLEM TO BE SOLVED: To provide a laying auxiliary tool that can facilitate the laying work of a piping structure that holds a moving range capable of coping with an prescribed external force. SOLUTION: In the piping structure, when the external force is applied to the structure, a body tube 13 and a sheath tube duct sleeve 14 supported and fixed to the inside of the body tube 13 are moved so as to be reciprocative with respect to a body tube duct sleeve 11 arranged on the sidewall 10a of a hand hole 10. A sheath tube 15 inserted into the sheath tube duct sleeve 14 is moved so as to be reciprocative with respect to the sheath duct sleeve 14. A stopper 28 is inserted into the sheath tube duct sleeve 14 in a state that a main body 31 is protruded from the base end of the sheath duct sleeve 14. An abutting member 29 is arranged on the internal face of the sidewall 10a. A distance between a sleeve locking part 33 arranged on the stopper 28 and an abutting part 37 is made to be a prescribed length according to the initial position of the base end of the sheath duct sleeve 14. A distance between the sleeve locking part 33 and a sheath tube abutting part 38 is made to be a prescribed length according to the initial position of the base end of the sheath tube 15. COPYRIGHT: (C)2007,JPO&INPIT
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