| 摘要 |
The present invention relates to a guardrail having cylindrical bumpers, comprising: posts installed apart from each other; an impact absorbing bumper rotationally installed in the post; rails installed in an upper and a lower part of the impact absorbing bumper on the post to face each other across the post, and formed with a bolt assembling groove in a longitudinal direction on a surface facing the post; and a fastening means to fasten the post and a pair of rails. The fastening means of the guardrail having the cylindrical bumpers comprises: a bracket bent in a C-shape to contact in three directions for a pair of rails installed in parallel between the posts; a set of bolt and nut to fasten the post, installed to fixate a bracket surface contacting the post to the post; a set of bolt and nut to fasten the rail, installed to fixate a bracket surface contacting the rail to the rail; and a reinforcement plate installed between a bolt head part of the set of bolt and nut to fasten the rail and the bolt assembling groove on the rail, formed with a pressing part bent with two ends contacting the rail towards an inner surface of the rail when fastening the set of bolt and nut to fasten the rail, and formed with latches having regular intervals on the pressing part. According to the present invention, the guard rail having the cylindrical bumpers provided to protect vehicles, facilities or pedestrians is able to prevent disintegration of assembling between the post and the rails by improving the fastening means to couple the post and the rails, against an external impact. The fastening capability is improved by the latches formed on the ends of the reinforcement plate provided inside the rail, with effects of retaining a normal fastening condition between the post and the rails within a predefined level of impact. |
