| 摘要 |
A pillar of a streetlight having a double pipe structure made of synthetic resin is provided to overcome physical deterioration of the synthetic resin through the double pipe structure formed by an external tube and an internal tube. A pillar of a streetlight having a double pipe structure made of synthetic resin includes an external tube(10), an internal tube(20), and a space maintaining unit(30). The pillar is installed on a ground and has a lamp at an end portion thereof. The external tube is formed by pressing the synthetic resin. The internal tube is formed by pressing the synthetic resin. The internal tube is inserted inside the external tube. The space maintaining unit is inserted between an inner surface of the external tube and an outer surface of the internal tube.
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