PROBLEM TO BE SOLVED: To provide a watering tube which suppresses dispersion in the amount of water supply for each water supply hole.SOLUTION: The watering tube includes: a main pipe 10 which has a liquid conveying passage 11 and a branch pipe 20 which is provided at a periphery of the main pipe 10 and has a communicating hole 21 provided between the liquid conveying passage 11 and the main pipe, a water supply hole 22 which is headed toward the outside, and a water supply channel 23 which extends between the communicating hole 21 and the water supply hole 22. A plurality of the communicating holes 21 are arranged with fixed spacings along with a longitudinal direction L of the liquid conveying passage 11. The inner diameter of the liquid conveying passage 11 varies along with the longitudinal direction L.COPYRIGHT: (C)2012,JPO&INPIT【課題】給水孔毎の給水量のばらつきを抑制する潅水チューブを提供する。【解決手段】潅水チューブは、液体搬送路11を有する主管10と、主管10の外周に設けられ、液体搬送路11との間に設けられた連通孔21と、外方へ向かう給水孔22と、連通孔21と給水孔22との間に延びる給水路23を有する支管20と、を備える。連通孔21は、液体搬送路11の長手方向Lに沿って所定間隔を空けて複数配置される。液体搬送路11の内径は、長手方向Lに沿って変化する。【選択図】図1
