PROBLEM TO BE SOLVED: To provide an insertion device having a constitution capable of expanding a grasping member from a constricted condition to a specific size in a short period of time.SOLUTION: The insertion device has the insertion part 13 inserted in a subject, the grasping member 20 arranged in the outer periphery of the insertion part 13, freely expandable and contractable in the radial direction R, and fixing the position of the insertion part 13 to a wall part by abutting on the wall part in the subject when expanding to a specific size, the sealing member 20 sealing and covering the grasping member 20, the grasping member 20 is constituted of an elastic body which constricts in the radial direction R and assumes a constricted condition when the inside of the sealing member 19 is decompressed and expands in the radial direction R and is elastically restored from the constricted condition to an expanded condition expanding to the specific size by its own elastic force when the decompression inside of the sealing member 19.COPYRIGHT: (C)2012,JPO&INPIT【課題】把持部材を短時間にて収縮状態から規定の大きさまで膨張させることのできる構成を具備する挿入装置を提供する。【解決手段】被検体内に挿入される挿入部13と、挿入部13の外周に設けられた、径方向Rに膨張収縮自在であるとともに規定の大きさまで膨張した際に被検体内の壁部に当接することにより、壁部に対して挿入部13の位置を固定する把持部材20と、把持部材20を密閉して覆う密閉部材19と、を具備し、把持部材20は、密閉部材19内が減圧されると径方向Rに収縮して収縮状態となり、密閉部材19内の減圧が解除されると径方向Rに膨張して収縮状態から規定の大きさまで膨張する膨張状態まで自身の弾性力により弾性復帰する弾性体によって構成されていることを特徴とする。【選択図】図2
