| 摘要 |
PURPOSE: Double engagement apparatus of a cable tray is provided to come from a double bolting combination structure between a crossbar and a side rail, thereby durably maintaining bond between the crossbar and the side rail. CONSTITUTION: Multiple crossbars (110) are arranged according to an extension direction of a cable at regular intervals. A first contract rib (112) and a second contract rib (114) are formed at each crossbar. At the same time, the first contract rib and second contract rib are formed by a molding process. A pair of side rails (120) supports the crossbars to a supporter. A joint (122) of the side rail is contacted on an opposing end of the crossbar.
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