| 摘要 |
PROBLEM TO BE SOLVED: To avoid problems of aesthetic appearance and safety caused by a left gate mark without any effort, when an outer member constituting a backrest is manufactured by an injection molding method.SOLUTION: An outer member 5 has a frame structure opened in the longitudinal direction and includes an upper member 9. The upper member 9 includes a rear step part 20 opened downward and rearward, formed thereon, and a land part 21 is formed on the rear step part 20. A hanger device 12 is attached to a place of the land part 21. In a case where no hanger device 12 is attached thereto, the land part 21 is covered by a cover 45. When the upper member 9 is molded, it is so set as to leave a gate mark 56 on the land part 21. The gate mark 56 is covered by the hanger device 12 or the cover 45, so as to, even if the gate mark is not scraped off highly accurately, cause no problem of the aesthetic appearance and safety.SELECTED DRAWING: Figure 4 |
