| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To prevent an upper frame from being dented, in a top plate section where the upper frame and lower frame are engaged with each other to grip a top plate rim. <P>SOLUTION: The top plate section 13 is constituted so that the upper frame 19 and lower frame 20 grip the rim of the top plate 21 and the upper frame 19 covers the whole lower frame 20. The inside of a front side section 19a of the upper frame 19 is provided with an engaging section 22 formed of an erecting section 22a folding to erect from the lower end and an inward section 22b folded inward from the erecting section 22a. The position corresponding to the engaging section 22 in the lower frame 20 is provided with an engaged section 31 engaging with the inward section 22b of the engaging section 22, and the upper frame 19 is connected to the lower frame 20 by engagement of the engaging section 22 with the engaged section 31. <P>COPYRIGHT: (C)2006,JPO&NCIPI</p> |
