| 摘要 |
PURPOSE:To enable a long-time and stable measurement with a longer life by a promotional weathering tester having a rotary contact unit, by providing a conical roller bearing as relay contact of a contact unit and to turn this to a rotary contact by injecting a conductive grease containing a conductive powder such as carbon powder. CONSTITUTION:A sample rotating frame turning around a light source provided in a testing tank is provided with a black panel thermosensitive section, a light receiving section, and a sensing section such as temperature sensing element, it is made to communicate with a contact unit 41 through a rotary shaft 14 and a signal from the sensing section is fetched from the contact unit 41 through a lead 35 to be transmitted to a measuring section or the like. A conical roller bearing 26 is used as relay contact of the contact unit 41 and combined with a fixed bearing 26a, mobile bearing 26b as a pair through a spring 44. A grease blended with a conductive powdery body such as carbon powder in a base oil, silver powder or copper powder is previously injected into the conical roller bearing 26 and a signal is fetched outside through a lead 39 at a terminal 37 of an external bearing 30.
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