| 摘要 |
PURPOSE: A connecting type trench cover is provided to prevent the trench cover from being upward separated by forming support protrusions in both sides of an insert coupling groove. CONSTITUTION: A connecting type trench cover(10) comprises insert rings(100) and insert coupling grooves(110). The insert rings are protruded from both sides of the front surface of a body. Barb-shaped inclined hanging protrusions(102) are formed in the ends of the insert rings. The insert coupling grooves are formed on the rear surface of the body in order to accept the insert rings. Separation preventing hanging protrusions(112) are formed in the insert coupling grooves and are lower than the inclined hanging protrusions. |
