Street pole

Abstract

Impact absorbing street pole extending substantially along a longitudinal direction, the street pole comprising an elongated extension ( 17 ) detachably connected at a predetermined height to a first part ( 18 ) of the street pole such that upon impact on the first part of the street pole, the elongated extension disconnects from the street pole.

1 . An impact absorbing deformation street pole extending substantially along a longitudinal direction, wherein the street pole bends upon impact and the bent part of the street pole crushes the vehicle, characterized in that the height of the first part of the street pole is chosen such that upon impact the bent part of the street pole crushing the vehicle does not substantially hit the roof of the vehicle and wherein the street pole comprises an elongated extension detachably connected at a pre-determined height to a first part of the street pole such that upon impact on the first part of the street pole, the elongated extension disconnects from the street pole. 
     
     
         2 . The impact absorbing street pole as claimed in  claim 1 , characterised in that the height of the first part of the street pole is smaller or larger than the height of the elongated extension. 
     
     
         3 . The impact absorbing street pole as claimed in  claim 1 , characterised in that the elongated extension and/or the first part of the street pole comprises a cylindrical body extending around the longitudinal direction along a circumferential direction. 
     
     
         4 . The impact absorbing street pole as claimed in  claim 3 , characterised in that the circumference of the first part of the street pole is smaller than the circumference of the elongated extension at the predetermined height. 
     
     
         5 . The impact absorbing street pole as claimed in  claim 3 , characterised in that the cylindrical body of the first part is hollow and comprises at least one overlap of a first and a second edge of a circumferential side wall forming the cylindrical body, the cylindrical body comprising fastening means for interconnecting the first and the second edge, the overlap having a length extending substantially parallel along the longitudinal direction. 
     
     
         6 . The impact absorbing street pole as claimed in  claim 5 , characterised in that the overlap has a width extending substantially along the circumferential direction. 
     
     
         7 . The impact absorbing street pole as claimed in  claim 5 , characterised in that the side wall and the fastening means are provided to split open along the overlap by breaking away the fastening means upon impact at a place of impact on the street pole, the cylindrical body, being provided at the place of impact. 
     
     
         8 . The impact absorbing street pole as claimed in  claim 5 , characterised in that the material of the side wall has a yield strength (Re) of between 50 N/mm 2 -700 N/mm 2 , preferably 200 N/mm 2 -550 N/mm 2 , more preferably 330 N/mm 2 -410 N/mm 2 . 
     
     
         9 . The impact absorbing street pole as claimed in  claim 5 , characterised in that the material of the side wall has a tensile strength (Rm) of between 50 N/mm 2 -1350 N/mm 2 , preferably 350 N/mm 2 -1050 N/mm 2 , more preferably 600 N/mm 2 -700 N/mm 2 . 
     
     
         10 . The impact absorbing street pole as claimed in  claim 5 , characterised in that the material of the side wall has a minimal elongation before breaking of at least 5%, preferably, 15%, more preferably 21%. 
     
     
         11 . The impact absorbing street pole as claimed in  claim 5 , characterised in that the side wall has a thickness of between 20 mm-0.5 mm, preferably 10 mm-1 mm, more preferably 5 mm-1 mm, even more preferably 2 mm. 
     
     
         12 . The impact absorbing street pole as claimed in  claim 3 , characterised in that the cylindrical body of the first part has a diameter at the place of impact of between 50 mm-500 mm, preferably 150 mm-400 mm, more preferably 200 mm-350 mm. 
     
     
         13 . The impact absorbing street pole as claimed in  claim 5 , characterised in that the width of the overlap is at least 0.1%, preferably maximally 100%, more preferably between 0.1% and 10%, most preferably between 2% and 3.5% of the circumference of the cylindrical body. 
     
     
         14 . The impact absorbing street pole according to  claim 5 , characterised in that the fastening means have a shear strength of between 2000N-7000N, preferably 3000N-6000N, more preferably 4000N-5000N, most preferably 4100N-4500N. 
     
     
         15 . The impact absorbing street pole as claimed in  claim 5  characterised in that the fastening means are rivets. 
     
     
         16 . The street pole as claimed in  claim 3 , characterised in that the cylindrical body has a round cross-section. 
     
     
         17 . The impact absorbing street pole as claimed in  claim 3 , characterised in that that the cylindrical body of the first part has a regular polygonal cross-section. 
     
     
         18 . The impact absorbing street pole as claimed in  claim 17 , characterised in that the overlap is substantially positioned at the centre between two adjacent vertices of the regular polygonal cross-section. 
     
     
         19 . The impact absorbing street pole as claimed in  claim 16 , characterised in that the regular polygonal cross-section comprises an uneven number of vertices. 
     
     
         20 . The impact absorbing street pole as claimed in  claim 5 , characterised in that the circumferential side wall forming the cylindrical body comprises at least one bent metal sheet. 
     
     
         21 . The impact absorbing street pole as claimed in  claim 20 , characterised in that the metal sheet is made from steel. 
     
     
         22 . The impact absorbing street pole as claimed in  claim 1 , characterised in that an attachment is connected to the elongated extension.