| 摘要 |
PROBLEM TO BE SOLVED: To reduce breakage of a connection portion and a terminal portion of each heater arranged on an outer peripheral surface of piping, caused by heat, to improve the durability, and to facilitate maintenance. SOLUTION: Connection projections 11, 21 provided at one end edges of first and second heaters 10, 20 are electrically connected via a connection bar 30 made of a metal plate. An intermediate portion of the connection bar 30 is processed in a curved shape. Terminals 12, 22 provided at the other end edges of the first and second heaters 10, 20 are connected to electric wires 14, 24 via electric wire connection pieces 13, 23 made of metal plates. Bodies of the electric wire connection pieces 13, 23 are formed in long bar shapes extending in a direction of the external shape of piping 1. The terminals 12, 22 are arranged at a bottom of the piping 1 so as to be hardly influenced by radiation heat from the respective heaters 10, 20. COPYRIGHT: (C)2010,JPO&INPIT
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