| 摘要 |
PURPOSE:To exactly fix a sheet material to a trough body by pressing a bar wedge into the groove of a rail in such a way as to pressingly fix the frame of the sheet material. CONSTITUTION:A trough body 4 is provided with an almost U-shaped cross section of rails 2 provided on the upper ends of its left and right-handed walls. A sheet material 3 made of a vinyl is provided, and a frame 3B of pinao wire is laid in a widthwise direction on a strip sheet 3A with a width corresponding to the width of the trough body 4. Both ends 3B' of the frame 3B of the sheet material 3 are inserted into the groove 2B' of a rail 2 and the sheet material 3 is laid on the trough body 4. Then, the both ends 3B' of the frame 3B of the sheet material 3 are exactly fixed to the groove 2B' of the rail 2 by pressing a bar wedge 5. |
