| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a scraper automating scraping work that had been done by hand. SOLUTION: A scraper 1 for partially scraping the surface of a PE tube 11 as a pretreatment for coalescent joining is provided with a device body 2 movable along the surface of the PE tube 11, an electric motor 4 arranged inside the device body 2 by sealing it up in it, a rotary blade 7 rotating by the power transmitted from the electric motor 7, and a positioning means 7A for regulating the amount scraped by the rotary blade 7.</p> |
