Crossing board box lid

Abstract

This item is a takeoff box cover used to close the runway in stadium-length jumping events (long jump, triple jump) when the takeoff board is not in use. In long jumping events, the takeoff board indicating the takeoff position is installed in a box buried in the runway when in use, but this item is used to close the runway when the takeoff board is not in use. This item is made of molded resin, and as shown in the reference oblique view and reference cross-sectional view showing the use state, when in use, the urethane used to pave athletics stadium tracks is poured onto the surface of the lid, and the urethane flows into the holes in the surface and becomes entangled, securing the urethane to the item.

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