| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a double wall cylindrical synthetic resin-made molded product capable of exhibiting decorative characteristics and functions due to a double walls by combining and firmly fixing an outer cylindrical body to the end part of an inner cylindrical body without damaging beautiful appearance. <P>SOLUTION: The double wall cylindrical synthetic resin-made molded product has a double wall cylindrical body formed by the synthetic resin-made outer cylindrical body and the inner cylindrical body inserted and combined to the outer cylindrical body, and a ring body made of a synthetic resin to be bondable to the outer cylindrical body by heat-welding and exhibiting a function as a fitting and engaging part for combining and fixing the ends of the outer cylindrical body and the inner cylindrical body at least at one end part of the upper end part and the lower end part of the double wall cylindrical body. The ring body is integrally provided around end part of the outer cylindrical body by heat welding using an insert molding of the outer cylindrical body and the inner cylindrical body as inserting materials. <P>COPYRIGHT: (C)2009,JPO&INPIT |
