| 摘要 |
PURPOSE:To install vertical intermediate frames and horizontal intermediate frames and an intermediate frame and an outer frame without using an installing screw. CONSTITUTION:Connecting holes 18 to insert connecting rods 17 extending in the lengthwise direction in a hollow space of horizontal intermediate frames 3, are arranged in fitting parts of vertical intermediate frames 11. A forming position of these connecting holes 18 is set in a position where the connecting rods 17 inserted in the connecting holes 18 come into contact with an inside surface 5a of a front side wall 5 of the horizontal intermediate frames 3 in a fitting condition of both fitting parts 12 and 4. |
