| 摘要 |
Apparatus is provided for self-righting a signpost after it has been tipped over comprising a plate for connecting to the signpost and a complementary tray secured to the ground. Most of the apparatus is located below ground ou t of harm's way. The tray has upturned peripheral edges within which the plate resides. A chain is connected to the plate, extends through a hole in the tray and in to the bore of a pipe for connecting to the bottom of a compression spring. When th e signpost and plate tip, the plate rotates within the tray, displacing the chain and compressing the spring. Preferably a lip extending over the edge of the plat e causes the plate to ride up the edge of the tray, increasing the chain's displacement. The increased tension in the chain urges the plate and signpos t to right themselves. The plate and tray are complementary and square shape so that the square sides engage during tipping and prevent rotation of the signpost' s orientation when it returns to the upright position. Preferably a cup is mounted to the plate for insertion of the shaft of a conventional signpost. |
