| 摘要 |
PROBLEM TO BE SOLVED: To provide a simple coupling structure to stably and durably intercouple rail members, of which a rail consists, without looseness, in a device on the rail for an exhaust gas sampling device applicable for discharge of exhaust gas from a vehicle. SOLUTION: A rail 2 consists of a plurality of rail members 5 intercoupled or assembled through a coupling element 6 means. Meanwhile, the coupling element 6 is formed in a wedge shape and the shape of a space 9 in the rail member 5 for the coupling element 6 corresponds to the wedge shape of the coupling element 6. A mounting means 10 is moved in a down state in the direction of an arrow mark A toward the rail member 5. This movement lifts the coupling element 6 in an up state in the direction of an arrow mark D toward the rail member 5. As a result, the coupling element 6 and the rail member 5 are fixed to each other through a wedge. |
