Guardrail With a Buffer Bracket For a Road

Abstract

A road guardrail having an impact buffering bracket between a waveform shape plate and a guardrail plate is disposed, in which an impact buffering bracket formed of a metallic plate is divided into a front bracket and a rear bracket, and the front and rear brackets are elastically engaged in forward and backward directions. When a vehicle collides with a guardrail plate, the engaged front and rear brackets are flexibly contracted for thereby releasing impact force, and in another embodiment of the present invention, an impact buffering bracket is formed in a rectangular tube shape, and a weak portion having a plurality of holes at both sides is formed. When a vehicle collides with a guardrail, the weak portion formed at the lateral sides is flexibly contracted for thereby releasing n impact force.

1 . In a guardrail in which a waveform shape guardrail is fixedly installed at a front side or front or rear side of a column vertically installed on the ground of a road, with an impact buffering bracket made by bending a metallic plate being interposed, a road guardrail having an impact buffering bracket characterized in that said impact buffering bracket  2  is divided into front and rear brackets  10  and  20 ; in the front bracket  10 , an engaging shoulder portion  12  made by bending a steel plate of the body  11  is provided on a front upper surface of the body  11  of which upper and lower and rear sides are open in a channel shape, with a vertical bent portion  4   a  being caught by the engaging shoulder portion  12  at the upper end of the guardrail  4 , with the vertical bent portion  4   a  being downwardly bent; and a plurality of bolt through holes  13  are connected in forward and backward directions at both sides of the body  11  in a peanut shape; a fixing engaging portion  16  is formed at both sides of the front surface of the body  11  for supporting the plane surface of the rear side of the guardrail plate  4  and the upper and lower inclination surfaces of the groove portion  9 ; and in the fixing engaging portion, the inclination engaging portion  15  is bent and formed at the plane engaging portion  14  of the center and the upper and lower sides of the same; and the rear bracket  20  is formed with the front and upper and lower sides being open, and an arc portion  5  forming the bolt engaging hole  21  is formed and engaged with a fixing bolt while corresponding to the rounded surface of [ 1 ], and a peanut shape bolt through hole  22  is formed in the forward and backward directions at the portion corresponding to the bolt through hole  13  of the both sides of the rear bracket  20 ; and in the rear bracket  20 , the arc portion  5  is engaged at the column  1  using the fixing bolt  3 , and the connection bolt  23  passes through the bolt through holes  13  and  22  at the front side of the rear bracket  20  with the rear side of the front bracket  10  and the front side of the rear bracket  20  being inserted; and the fixing engaging portion  16  and the guardrail  4  are engaged using the fixing volt in a state that the vertical bent portion  4   a  of the guardrail  4  is caught by the engaging shoulder portion  12  at the front side of the front bracket  10 . 
   
   
       2 . In a guardrail in which a waveform shape guardrail is fixedly installed at a front side or front or rear side of a column vertically installed on the ground of a road, with an impact buffering bracket made by bending a metallic plate being interposed, a road guardrail having an impact buffering bracket characterized in that a rectangular tube shaped body  11   a  is formed at a rear side of the impact buffering bracket  2  with an arc portion  5  being formed thereat while corresponding to the rounded surface of the column  1 ; and an engaging shoulder portion  12  made by bending a steel plate of the body  11   a  is formed at a front upper side of the body  11   a ; and a weak portion  19  having a plurality of holes is formed at both sides of the body  11   a ; and a fixing engaging portion  16  supporting the plane portion  8  of the rear surface of the guardrail  4  and upper and lower inclination surfaces of the groove portion  9  at both front sides of the body  11   a ; and the plane engaging portion  14  and the inclination engaging portion  15  are bent and formed at the center and upper and lower sides of the fixing engaging portion  16 ; and a bolt hole  17  is formed at the engaging portions  14  and  15 .