| 摘要 |
<p>PROBLEM TO BE SOLVED: To cope with a damage part different in size only by preparing one kind and reduce a manufacturing cost, to reduce a working cost through suppression of a power consumption amount and shortening of a working time, and besides to improve the earthquake resisting power of a repair spot. SOLUTION: A repair member for a plastic pipe has an inner peripheral surface 2a curved along the outer peripheral surface of a plastic pipe 10 and has a heater 3 embedded on the inner peripheral surface 2a side. The heater 3 consists of a plurality of division magnetic alloy heaters 3A, 3B, and 3C embedded in a mutually concentrically and annual shape and in a plurality of spots independent from each other and at intervals of a distance in the internal and external direction of a plate-form repair member 2. By selecting energization of a high frequency current through electromagnetic induction to the division magnetic alloy heaters 3A, 3B, and 3C, the annular heat generation region of the heater 3 is variable to a plurality of steps of the areas.</p> |
