| 摘要 |
<P>PROBLEM TO BE SOLVED: To prevent a balloon from being left as it is expanded. <P>SOLUTION: An overtube 16 includes an insertion tube 31 to which an insert part 21 of an electronic endoscope 12 is inserted, a balloon 35 installed on the insertion tube 31, and yarn members 36 and 37 to sew the balloon 35 on the insertion tube 31. Inside the tube walls composing the insertion tube 31, an air feed/intake tube 40 is formed to feed and take in air to the balloon 35. On an outer circumferential surface of the insertion tube 31, an end of the air feed/intake tube 40 is provided. The balloon 35 is installed on the outer circumference of the insertion tube 31 in such a way as to cover the end of the air feed and intake tube 40. On the outer circumferential surface of the insertion tube 31, a plurality of needle holes 45 and 46 to sew the balloon 35 on are provided to be apart from each other in the circumferential direction of the insertion tube 31. The yarn members 36 and 37 are inserted to the needle holes 45 and 46 through the balloon 35 from the outer side to the inner side, and through the balloon 35 from the inner side to the outer side repeatedly, so that the balloon 35 is sewn on the insertion tube 31. <P>COPYRIGHT: (C)2012,JPO&INPIT |
