| 摘要 |
PROBLEM TO BE SOLVED: To provide a sign of a prefabricated triangular pyramid shape which is simple in construction, is light in weight and is easy to transport, store, move and install by forming the sign which consists of freely openably bundled plastic pipes as struts and is composed of tarpaulin display sheets consisting of fibers and a synthetic resin and forming these display sheets as an attachable and detachable type. SOLUTION: The triangular pyramid struts are formed by bundling the one- side ends of the three plastic pipes 1, universally connecting the other ends by means of latches 2 and opening the legs. Fabrics 4 sewn with zippers or hook-and-loop fasteners are previously adhered to the plastic pipes 1. Weights, such as sand bags, are previously packed into the cavities on the lower ground contact side of the pipes. The display sheets 3 are the tarpaulins consisting of the fibers and the synthetic resin. These sheets are cut to a triangular shape and the zippers or hook-and-loop fasteners are sewn to the rear sides of the two sides thereof. The front sides are display surfaces printed with display items, such as 'Off Limits', of which the letter-forms, expressions, etc., are not limited.
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