PROBLEM TO BE SOLVED: To provide an in-pipe investigate device that can reduce inspection time even if a target pipe has a long inspection distance.SOLUTION: A flange 23 is attached in a fluid-tight manner to either end of a tubular inner tube 21 that extends and compresses in an axial direction, a tubular elastic body 22 that is restrained from extending in the axial direction is disposed to cover the inner tube 21 with its ends fixed to the flange 23 in a fluid-tight manner, an air distributing hole 31 is provided in the flange 23 to communicate with an air chamber S formed between the inner tube 21 and the elastic body 22, and a switching valve 14 is attached to the air distributing hole 31 to switch between air supply to the air chamber S and air exhaustion from the air chamber S, thereby providing a telescopic unit 20. A plurality of telescopic units 20 are connected to form an in-pipe mobile body 13. The switching valves 14 of the plurality of telescopic units are supplied with air through an air supply tube 16C extending from compressed air supply means 16 to the in-pipe mobile body 13. Progress control means 17 individually controls the switching valves 14 of the plurality of telescopic units to supply air to the air chambers S of the telescopic units.COPYRIGHT: (C)2015,JPO&INPIT【課題】検査対象である管の検査距離が長くても検査時間を短縮することができる管体内探査装置を提供する。【解決手段】軸線方向に伸縮する筒状の内筒21の両端にフランジ23を液密に取り付け、軸線方向への伸長が規制された筒状の弾性体22を、内筒21を覆うように被せて端部をフランジ23に液密に固定し、内筒21と弾性体22との間で形成される気室Sに連通する空気流通孔31をフランジ23に設け、この空気流通孔31に気室Sへの空気の供給と気室Sからの空気の排気とを切り替える切替弁14が取り付けられた伸縮ユニット20を複数個連結した管体内移動体13に、圧縮空気供給手段16から管体内移動体13に延長した空気供給管16Cから複数の伸縮ユニットの切替弁14に空気を供給し、進行制御手段17により複数の伸縮ユニットの切替弁14を個別に制御して伸縮ユニットの気室Sに空気を供給する構成とした。【選択図】図1
