| 摘要 |
PURPOSE: To variously mount passage blocks by forming lengthwise openings of the passage by shortening two passage sides brought into contact with one another at a corner of cross section of the passage, and providing fixing edges positioned outward to mount the passages extended in parallel with a lengthwise direction at least three of the four passage sides. CONSTITUTION: To form an opening of a width (c), side sections 11' of two lateral bars 11 directed toward one corner are shortened by sizes (b) to form the opening 20. A row of passage cross sections of rectangular and square shapes of various sizes can be formed as needed while holding a pitch network of fixed edges 12 having a reference pitch (a). In normal case, all four passage sides have two or more edges 12, but in a narrow rectangular cross sectional case, only one fixed edge can be existed at the one narrow side in contact with the opening 20. |
