| 摘要 |
A length-adjustable construction pole construction pole is provided to indicate different directions by employing a sign board hanger, which is foldable. A length-adjustable construction pole construction pole comprises slidable pipes(P1,P2,P3), a sign board hanger(51), a sign board hanger main body(52), clamps(54), and a plurality of rings. The slidable pipes adjust the length of the pole by sliding up and down. The sign board hanger main body is installed to the pole. The signal board hanger is hinged at the sign board hanger main body, and has holes to hang a sign board. The clamps sandwiches the sign board hanger main body. The rings are disposed between the clamps to cause the clamps to be fixed to the pole securely.
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