| 摘要 |
PURPOSE:To enable an air plug to be very easily fixed and set by partially inserting an inner pipe into an outer pipe, and covering the whole outer pipe with an airtight bag-shaped elastic body, and further tightening a part of the outer circumference of the elastic body with a band. CONSTITUTION:In the inside of an outer pipe 2 made of a metal or the like and having a high rigidity, an inner pipe 3 of similarly high rigidity is partially inserted. And the whole outer pipe 2 is covered by an airtight high-flexible bag-shaped elastic body 4. In the inside of the elastic body 4, a closed space S is formed. Accordingly, a part of the inner circumferential part of the elastic body 4 becomes such a shape as it has been sandwiched between the outer pipe 2 and the inner pipe 3. A part (a) of the outer circumference of the elastic body 4 is tightened from the outside with a band 5 to form a bag shape. As a result, by supplying compressed air to the air plug, it can be very easily fixed and set. At the same time, pipings can be connected by the air plug. |
