| 摘要 |
A joint structure for connecting a primary-side cylindrical short pipe (1a) and a secondary-side cylindrical short pipe (1) to each other through which an object to be conveyed passes using a flexible cylindrical tube (3), wherein annular expansion portions (4, 4a) are formed integrally with opening edges facing each other on the primary-side and secondary-side cylindrical short pipes (1a, 1) to have a larger dimension than an outer diameter of each of the cylindrical short pipes, respectively, outer wall faces of the expansion portions are configured such that diameters thereof are gradually reduced from openings, respectively, and end portions of the flexible cylindrical tube are attached to be covered on outer faces of the expansion portions (4, 4a), respectively. |
