| 摘要 |
PROBLEM TO BE SOLVED: To balance the locking strength between the inner and outer runners without complicating a structure and the like. SOLUTION: Both of a pair of upper surface opened-suspending pieces 22a of a guide rail 22 are provided with a series of locking claws 32, and an different side extending piece 40 extending in the inner and outer direction different from the folding direction of a horizontal folded piece 12a is integrally formed continuously from the horizontal folded piece, by partially cutting and standing a lock plate 12. Both of the horizontal folded piece 12a and the different side extending piece 40 are provided with the predetermined number of lock holes 34.
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