CN106232902A - street column - Google Patents

Abstract

What direction extended substantially along the longitudinal absorbs the street pole clashed into, described street pole includes elongated extension (17), this extension can be separately connected to the Part I (18) of street pole at predetermined height, when making on the Part I impinging upon street pole, elongated extension separates from street pole.

Description

street column

technical field

The invention relates to an impact-absorbing street pole according to the preamble of the first claim.

Background technique

Impact-absorbing street poles are already known in the prior art. Design engineers today are actually finding other ways to improve the safety of vehicle occupants by focusing more on the following advantages: This can be achieved by improving the crashworthiness of street furniture, such as by reducing the size of vehicles and street pillars. impact effect. Against this background, an impact-absorbing street pole has been developed, ie a pole which is configured to at least partially absorb the impact of a vehicle with a pole of this type. An example of such an impact-absorbing street pole is known from US 2010/0107521 A1. US 2010/0107521 A1 describes an impact-deformation-absorbing street pole formed in such a way that the impact of a vehicle with the pole deforms (ie flattens) the area of the pole that was initially in direct contact with the vehicle. When the vehicle moves forward after the initial impact with the column, the impact can then protrude other sections of the column above and below that area of the column, and eventually can cause the column to bend backwards on top of the vehicle (in effect on, is the collapse). The deformation and subsequent protrusion absorb the impact energy. The bending of the column on top of the vehicle confines the vehicle. However, it may happen that once the vehicle makes an impact, the pillar actually squeezes the roof when it bends over the roof of the vehicle and may injure the occupants of the vehicle, for example.

Thus, street poles according to the state of the art still present a significant risk to the occupants of the vehicle during an impact of the vehicle with the street pole.

There is therefore a need for an impact absorbing street pole which improves its safety characteristics.

Contents of the invention

To this end, the street post includes an elongated extension that is detachably connected to the first portion of the street post at a predetermined height such that upon impact on the first portion of the street post, the elongated extension moves from the Street columns separated.

The inventors have found that by providing an impact-absorbing street pole with an elongate extension detachably connected to a first portion of the pole, the absorbed energy is substantially reduced for occupants of the vehicle during a vehicle impact with the street pole. Risk of crushing of curved portions of impacted street poles (more specifically, street poles that absorb impact deformation). According to the European standard EN 12767/2007 or the American standard NCHRP350 or MASH, preferably, in the context of the present invention, impact means an impact of a vehicle of approximately 900 kg at a speed of eg 35 km/h or at a higher speed of 50 km/h, 70 km/h or 100 km/h. Upon impact, the impact-absorbing street pole absorbs at least a portion of the energy generated during the impact, thereby reducing deformation of the vehicle upon impact and causing less excessive dip in acceleration versus time for occupants of the vehicle , and the separation of the elongated extension from the street pole reduces, for example, the jackknife effect where a street pole (such as, for example, deforms to absorb impacts) bends and the bent portion of the street pole crushes the vehicle. Since the length of the curved section of the street post can be reduced compared to prior art deformable street posts, the length of the post and the momentum of the curved section when impacting the vehicle is reduced, limiting damage to the vehicle and Risk of injury to vehicle occupants. The invention is of course not limited to impact-absorbing deformation poles, and is also applicable to other impact-absorbing poles, such as for example a detached impact-absorbing pole, the first part of which detaches upon impact with a vehicle.

The combination of impact-absorbing street poles and slender extensions enhances the assembly's impact-absorbing capabilities and allows for better control of g-forces upon impact. Additionally, the incorporation according to the present invention enables the inventors to erect taller and more durable structures for use as roadside hardware.

According to a preferred embodiment of the present invention, the height of the first part of the street column is chosen to enable improved control of the gravitational force on impact at impact and, when applied to a street column that absorbs impact deformation, such that the street The curved portion of the column crushing the vehicle does not substantially hit the top of the vehicle. It was found that such a length makes it possible to further reduce the risk of injury to the occupants of a vehicle hitting a street pillar.

According to an embodiment of the street column according to the invention, the height of the first part of the street column is smaller or larger than the height of the elongated extension depending on the desired configuration.

According to a preferred embodiment of the street pole according to the invention, the elongate extension comprises a cylindrical body (eg a hollow cylindrical body) extending circumferentially around the longitudinal direction.

This arrangement of the elongated extension makes its construction simpler, since it can be manufactured, for example, by bending a thin sheet of bendable material about a given axis. If the cylindrical body is hollow, this reduces the risk that the elongated extension could injure a person or eg damage the vehicle if the elongated extension separates from the first part due to an impact of the vehicle. This also makes it possible for such cables to pass through the hollow cylindrical body, if eg wires or any other cables or conduits especially come from the first part of the street pole comprising the hollow cylindrical body in which the cables reside.

According to a preferred embodiment of the street pole according to the invention, an attachment member such as any one or more of lamps, road signs, street markings, traffic lights is connected to the elongate extension. Naturally, any attachment may also be attached at other locations, for example in combination with an attachment to the elongate extension. For example, additional attachments may be attached at a much lower location, such as a road sign at a height where traffic participants can easily read the sign (e.g., a motorist looking through the window of his car), such as at A few meters above the road.

Such an attachment can be fixedly connected to the elongated extension and releasably connected with the elongated extension together with the street post when the vehicle impacts on the first part of the street post, whereby especially when the street post is absorbing When hitting a deformed street post, it is avoided that a relatively heavy object with relatively high momentum hits the vehicle and could injure the vehicle's occupants, or damage property in the vicinity of the street post.

According to a preferred embodiment of the street column according to the invention, at a predetermined height the circumference of the first part of the street column is smaller or larger than the circumference of the elongate extension depending on the desired configuration.

In this way, the elongated extension can be easily connected to the first part of the street column, especially if at a predetermined height the circumference of the first part of the street column is smaller than the circumference of the elongated extension and the street column The top of the first part of the slender extension fits snugly into the elongated extension, thereby bringing increased stability to the assembly of the first part of the street column with the elongated extension and, in some cases, eliminating any additions connection device. In addition, this type of connection prevents, for example, precipitation, such as rain, from entering the street column.

According to a preferred embodiment of the street column according to the invention, the first part of the street column comprises a cylindrical body extending in the circumferential direction around the longitudinal direction.

This arrangement of the first part of the street column (in a similar manner to the elongated extension) makes the construction of the first part lighter and simpler. The arrangement of the first part of the street pole comprising the main body reduces the impact force of the vehicle because such a pole can absorb part of the energy of the impact and deform (forming a street pole that absorbs the deformation of the impact) and can reduce injury to people and/or For example the risk of damage to the vehicle. This also enables eg wires or any other cables or conduits to be passed through the cylindrical body if the cylindrical body is hollow.

According to a preferred embodiment of the street post according to the invention, the cylindrical body is hollow and the cylindrical body of the first part comprises a first edge and a second side wall constituting the circumference of the hollow cylindrical body. At least one overlap of two edges, the hollow cylindrical body comprising fastening means for interconnecting the first edge and the second edge, the overlap having a length extending substantially parallel to the longitudinal direction .

The inventors have found that the first part of the street post with such a seam makes it possible to attach the first edge to the The second edges are connected to each other. Furthermore, a street column according to the invention having such a first portion is aesthetically pleasing and, since it does not have a protruding flange, is safer for people passing the street column.

Another alternative for fastening adjacent metal sheets that is known from the state of the art is by bending the metal sheets so that adjacent edges come into collinear contact with each other. However, it is difficult to interconnect adjacent edges that are in collinear contact, and in order to achieve sufficient interconnection of the first edge and the second edge, the interconnection is mainly limited to welding. For example, bolts cannot be used directly in this interconnection. When the metal sheets are galvanized, for example by electroplating, before the metal sheets are bent and interconnected to form a street post, adjacent edges can no longer be welded together, or at least become more difficult to weld together. So instead, adjacent edges in collinear contact need to be welded together before plating e.g. The edges are plated, which is more difficult and therefore more expensive. When the street post comprises a first part (comprising a seam with a first edge and a second edge), it can be solved by using other non-welded fastening means such as for example bolts, nails, rivets, screws or the like This problem, because the fastening means of the first part of the street column according to the invention is no longer limited to welding.

According to a preferred embodiment of the street pole according to the invention, the side wall and the fastening means are arranged to separate along the seam by disengaging the fastening means when an impact occurs at the impact location on the first part of the street pole , a hollow cylindrical body is disposed at the impact location.

The first part of such a street column is designed to absorb impacts such as a vehicle, so that the kinetic energy of an object, such as a vehicle, striking the street column is passed through the deformation of the first part of the street column (so that the street column is an impact-absorbing deformation street column) preferably Substantially absorbed by the first part of the street pole, the impact replaces, for example, a deformation of the object which, in the case of a vehicle, for example, is dangerous for the occupants of the vehicle. Accidents involving such street pillars struck by a vehicle were found to have a reduced fatality rate than accidents involving street pillars that did not absorb the energy of impact with a vehicle. Street poles that are capable of absorbing a substantial amount of energy in an impact with a vehicle are often referred to as passively safe street poles.

Street poles designed to absorb the energy of an impact with a vehicle are described, for example, by FI94890B. However, the street post according to FI94890B does not have a seam having a width extending substantially in the circumferential direction as described above comprising the street post of the preferred embodiment, but instead has an inwardly curved flange. When a vehicle hits a street pole according to FI94890B, the fastening means are arranged to disengage from the splice, with the further consequence that the splice separates. However, it was found that the stiffness of street poles according to FI94890B during a collision with a vehicle is generally still too great, so that the amount of energy absorbed by the street pole is insufficient, which increases the amount of energy that needs to be absorbed by the car, resulting in the death of the vehicle's occupants and /or increased risk of injury.

However, the splice of the first portion of the street pole of the preferred embodiment can be used for improved absorption of the kinetic energy of the vehicle. Without wishing to be bound by any theory, the inventors believe that this is caused by the substantially circumferential orientation of the width of the seam. It was found that the impact of the vehicle onto the impact site caused the hollow cylindrical body to collapse in the direction of the impact, making the street pole a street pole that absorbs impact deformation. As a result, the first part and the second part of the side wall of the hollow cylindrical body (the second part is opposite to the first part along the direction of impact) are pushed together in the direction of impact, and the hollow cylindrical body A third portion and a fourth portion of the side wall of the main body (the fourth portion being opposite the third portion in a direction substantially perpendicular to the impact direction) are urged away from each other. The relative movement of the first, second, third and fourth parts causes the two edges to move in opposite directions along the width of the seam so that the first part of the street post moves along the The seams are separated in the longitudinal direction. A similar effect can be discussed eg in WO2008151862.

The inventors have found that, upon impact, this opposite movement of the edge causes a significant sudden drop in the stiffness of the first portion of the street pole, which increases the amount of energy that can be absorbed by the street pole of the present invention. Without wishing to be bound by any theory, the inventors believe that the opposite movement of the edges along the width of the seam induces a shearing effect which results in improved disengagement of the fastening means.

The inventors have also found that the stiffness of the first portion of the street pole of the invention which has not been impacted remains substantially unchanged. In other words, the street pole according to the invention enables the stiffness of the street pole to be significantly reduced during the impact, yet maintains the stiffness of the street pole before the impact.

According to a more preferred embodiment of the street post according to the invention, the fastening means are rivets.

The inventors have found that by connecting the two edges to each other with rivets, the interconnection of the two edges becomes increasingly easier and for example even edges of galvanized steel can be interconnected for example. Furthermore, while the rivets provide sufficient rigidity to the unimpacted first portion of the street post, during impact the rivets are also more prone to disengagement due to the opposing movement of the edges along the width of the seam, making the The amount of energy absorbed by the first part is further increased, improving the passive safety of the street column.

Description of drawings

Further details and advantages of the street column according to the invention and the method for installing the street column according to the invention will become apparent from the accompanying drawings and from the description of a preferred embodiment of the invention.

Figure 1 shows a preferred embodiment of a street post according to the invention;

Figure 2 shows a different embodiment of a street post according to the invention;

Figure 3 shows a cross-section of a preferred embodiment of a street post according to the invention;

Figure 4 shows a street post hit by a vehicle according to the prior art;

Figure 5 shows a cross-section of a different embodiment of a street post according to the invention;

Figures 6a to 6d successively illustrate the effect of a vehicle striking a street pole according to the invention during a vehicle impact with a street pole.

detailed description

In Figures 1 and 2 there is shown a street column 1 comprising an elongate extension 17 connected to a first part 18 of a street column 1 according to the invention. The first part 18 of the street column 1 shown in Figures 1 and 2 is fixed to the ground. The first part 18 of the street pole 1 can be secured to the ground in any manner known to those skilled in the art. For example, the first portion 18 of the street post 1 may be inserted into the ground, bolted to the ground, and the like. When secured to the ground, preferably the street pole 1 extends in a substantially upright (preferably vertical) direction as shown in FIG. 1 . However, the street column 1 can also be arranged for example to be fastened to a wall of a building extending in a substantially horizontal direction or the like.

The street column 1 shown in FIGS. 1 and 2 extends substantially along the longitudinal direction 8 . The longitudinal direction 8 extends between the first end and the second end.

The first end is configured to be fastened to the base layer. In Figures 1 and 2, the base layer is shown to be substantially horizontal. However, the base layer may also extend substantially vertically or in any other direction. As discussed above, the base layer may be, for example, the ground, a wall of a building, or the like.

The first end can, for example, be arranged to be inserted into the ground. Furthermore, the first end portion may be arranged to be at least partially set in cement. However, other known means of fastening the first end to the base may be used, such as bolting the first end to the base.

Preferably, the first end comprises means for enabling electrical wires to enter the street pole 1 , preferably into the first part 18 of the street pole 1 , for example to provide power to lighting or any other electrically powered device. In addition, the first end comprises, for example, an opening to the interior of the street column 1 , preferably the first part 18 of the street column 1 . However, this is not critical to the invention and the wires could also be arranged along the outside of the street pole 1 for example.

The second end is arranged to be provided with devices such as, for example, lights 19, street signs, traffic signs, traffic lights, direction signs, billboards and the like. The second end may, for example, be provided with one, two, three, four or even more horizontally curved arms, each arm comprising a lighting device forming a lighting pole which can be placed along a street or Highway use to illuminate streets or highways. The second end is part of the elongated extension 17 .

The street post 1 may have any shape and size deemed suitable by a person skilled in the art. The longitudinal direction 8 of the street column 1 shown in Figures 1 and 2 is substantially straight. However, the street column 1 may, for example, be curved in its longitudinal direction 8 when it is arranged to be mounted to an upright base.

The street column 1 comprises an elongate extension 17 detachably connected to a first part 18 of the street column 1 at a predetermined height h. The elongate extension 17 shown in Figures 1 and 2 comprises a cylindrical body extending circumferentially around the longitudinal direction. The circumference of the elongate extension 17 may be smaller than, equal to or greater than the circumference of the first portion 18 of the street column 1 to which the extension is connected. 1 and 2 show the attachment 19 connected to the elongated extension 17 . The attachment can be, for example, a street lamp, a traffic light, a traffic sign or a billboard, but by no means limited to the examples mentioned here.

The street pole 1 , preferably the first part 18 , comprises a cylindrical body 6 . The cylindrical body 6 extends around the longitudinal direction 8 in a circumferential direction 9 . A cross-section of such a cylindrical body 6 is shown, for example, in FIGS. 3 and 5 .

The cylindrical body 6 can be arranged at any position along the longitudinal direction 8 of the street pole 1 , preferably the first part 18 . The street column 1 (preferably the first part 18) may for example comprise a first longitudinal section, solid or hollow, and a second longitudinal section, for example of wooden or plastic etc., the second longitudinal section is formed by at least one cylindrical body 6 . The first longitudinal section and the second longitudinal section can be arranged at any position along the longitudinal direction 8 such that the first longitudinal section is arranged near the first end and the second longitudinal section is arranged at the second end Nearby, but preferably, the first longitudinal section is arranged near the second end and the second longitudinal section is arranged near the first end. Preferably, the street column 1 , preferably the first part 18 , consists of at least one cylindrical body 6 . FIG. 2 shows, for example, that the first part 18 of the street column 1 consists of different successive cylindrical bodies 6 . However, as shown in FIG. 1 , preferably, the first part 18 of the street column 1 is formed by a single cylindrical body 6 .

The inventors have found that the street column 1 can be easily formed when it is constituted by a single cylindrical body 6 , preferably a hollow cylindrical body, preferably the first part 18 .

The cylindrical body 6 may be made of any material such as plastic, wood, metal such as eg aluminium, iron, stainless steel, galvanized steel, etc.

The cylindrical body 6 may have any shape and size deemed suitable by a person skilled in the art.

Preferably, the dimensions of the cylindrical body 6 are substantially determined by its length and diameter 12 . The length of the cylindrical body is measured along the longitudinal direction 8 of the street column 1 (preferably the first part 18), while as shown in Figures 3 and 5, the diameter 12 is defined to define the cylindrical body 6 The diameter of the arc in the circumferential direction 9.

The diameter 12 of the cylindrical body 6 can be determined by a person skilled in the art.

The shape of the cylindrical body 6 is substantially determined by the shape of the cross-section of the cylindrical body 6 . Two examples of polygonal and circular shapes of the cross section are shown in FIGS. 3 and 5 , respectively. However, any other shape of cross-section (such as, for example, having 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20 Regular or irregular polygons, arcuate shapes such as ellipsoids, etc.) with or even more vertices 13 are possible and can be determined by a person skilled in the art.

The cross-section of the cylindrical body 6 may vary along the length of the cylindrical body 6 . The cross-sectional area may, for example, become larger or smaller along the length, or may remain substantially constant.

Preferably, (more preferably but not necessarily, when the cylindrical body 6 has a polygonal cross-section), as shown in Figures 1 and 2, the area of the cross-section of the cylindrical body 6 is along the 1 (preferably the first portion 18 ) becomes smaller towards the second end of the street column 1 .

Preferably, (more preferably but not necessarily, when using a circular cross-section as shown in FIG. 3 ), the cross-sectional area of the cylindrical body 6 is along the street column 1 (preferably the first part 18) The longitudinal direction 8 is substantially unchanged.

The cylindrical body 6 of the street column 1 , preferably the first part 18 of the street column 1 , comprises side walls 7 forming the circumference of the hollow cylindrical body 6 . The circumferential side wall 7 comprises a first edge 3 and a second edge 4 which are joined to form the seam 2 . For example, FIGS. 3 and 5 show plan views of the seam 2 . As shown in FIGS. 1 and 2 , the splice 2 has a length 10 extending substantially along (preferably parallel to) the longitudinal direction 8 . However, the length 10 of the splice 2 may extend in any possible direction extending substantially in the longitudinal direction 8 .

The circumferential side wall 7 can be a separate part or can consist of different parts. When the hollow cylindrical main body 6 is made of many parts, any method known in the art such as welding, welding, bonding, staple connection, bolt connection, screw connection, rivet connection or the like can be used. method to connect components.

The seam 2 can be positioned at every position along the circumferential side wall 7 . However, when the hollow cylindrical body 6 has a polygonal cross-section, preferably the seam 2 is arranged between two adjacent vertices 13 of the polygonal cross-section. More preferably, the seam 2 is arranged substantially equidistant from two adjacent vertices 13 . However, the seam 2 may be provided at every position that a person skilled in the art considers suitable, such as for example at the apex 13 or near the apex 13 .

While a single splice as shown in Figures 3 and 5 may be sufficient for the envisaged application of the street column 1, this is not critical to the invention and the street column 1 may also have multiple A splicing part 2. For example, the street column 1 may have two, three, four, five, six, seven etc. joins 2 eg depending on the size of the street column 1 . It has been found that by providing multiple seams, the impact absorption properties can be better controlled. Especially when providing street columns with a relatively large diameter, it was found that although the increased diameter increases the strength of the street column 1 , multiple seams can provide the desired impact-absorbing properties.

When multiple seams 2 are provided, preferably, the seams 2 are substantially evenly distributed on the circumference of the street pole 1 to provide substantially uniform impact-absorbing performance. For example, when the hollow cylindrical body 6 has a polygonal cross-section, preferably, the seams 2 are arranged between adjacent vertices 13, leaving for example the same or such as Basically the same number of vertices 13. So, for example, when the hollow cylindrical main body 6 is a regular convex nonagonal polygon, the main body has nine vertices 13, and the number of seams can be three, for example, where in the seams Between 2 are three vertices 13 or are two edges between vertices 13 .

The hollow cylindrical body 6 comprises fastening means 5 for interconnecting the first edge 3 and the second edge 4 of the circumferential side wall 7 . Any fastening means 5 known to a person skilled in the art may be used, eg bolts, nuts, rivets, screws, nails, staples, adhesives, welds, solderings and the like.

When the seam 2 of the first edge 3 and the second edge 4 is pressed into one of the first edge 3 and the second edge 4, for example due to the elastic force remaining after bending the edge in the desired seam configuration The friction caused by pressing one edge against the other allows the first edge 3 and the second edge 4 to achieve a sufficient mutual connection. In this case the fastening means 5 fits the first edge 3 and the second edge 4 and additional bolts, nuts, rivets, screws, nails, staples, adhesives, solder joints, solder etc. are unnecessary of. According to a preferred embodiment of the invention, disengagement of the fastening means 5 means in this case that the frictional force between the first edge 3 and the second edge 4 is overcome and enables the first edge 3 and the second edge 4 to Move in the opposite direction along the width direction of the splice 2 .

Preferably, the fastening means 5 are arranged, for example, at regular distances along the entire length 10 of the splice 2 when, for example, nuts, bolts, screws, nails, staples or the like are used, or preferably, when, for example, The fastening means 5 are provided along the entire length 10 of the splice 2 when adhesive, solder joints, solder or the like are used to bring together the first edge 3 and the second edge 4 . However, other configurations of the fastening device 5 are possible.

Seam 2 has a width 11 extending substantially in circumferential direction 9 . In other words, the first edge 3 and the second edge 4 of the circumferential side wall 7 overlap one another in the circumferential direction 9 . Width 11 is shown, for example, in FIGS. 1 and 2 .

The width 11 of the seam 2 can be determined by a person skilled in the art. Preferably, the width 11 of the seam is determined according to the required strength of the fastening device 5 and/or of the street post 1 . For example, when using rivets, bolts, nails, screws, staples, etc. to interconnect the first edge 3 and the second edge 4 of the cylindrical body 6, the width 11 needs to be sufficient to receive the fastening means 5 and sufficient A sufficient interconnection is provided for the first edge 3 and the second edge 4 . When using other fastening means 5, such as for example adhesives, solder joints, solder, etc., the width 11 needs to be adapted to the interconnection properties of the fastening means 5, so that the width 11 needs to be increased or possibly decreased for the first Edge 3 and second edge 4 provide sufficient interconnection.

The width 11 may be as small as 1 mm for certain types of fastening means 5, for example, or the width 11 may extend, for example, substantially up to the entire width of the sides between the vertices 13, and/or to more than a hollow circle in the case of 100% of the circumference of the cylindrical main body 6 : the side wall 7 comprises at least two layers wound around the longitudinal direction of the street column 1 , preferably the first part 18 of the street column 1 .

The inventors found that the increased width 11 of the seam 2 increases the friction between the first edge 3 and the second edge 4 of the seam 2, making it possible to avoid the , staples, adhesives, solder joints, solder, etc. for additional fastening means 5. Furthermore, the increased width of the seam 2 makes it possible to position the fastening means 5 in staggered positions relative to each other along the longitudinal direction of the street pole 1 if they are eg provided differently to the street pole 1 .

The width 11 of the seam 2 may be substantially constant along the longitudinal direction 8 of the street column 1 , preferably the first part 18 of the street column 1 , especially if the width is for example expressed as between two vertices 13 percentage of sides. However, this is not critical to the invention and the width 11 may vary along the longitudinal direction 8 of the street column 1 , preferably the first part 18 of the street column 1 .

Preferably, the hollow cylindrical body 6 is made of a bendable material such as metal, for example. In this way, the hollow cylindrical body 6 can be made by bending a sheet 14 of bendable material, preferably a metal sheet, into a desired shape with a desired cross-section. However, any other material as described above is possible and it is also possible, for example, to cast the hollow cylindrical body 6 .

In the case of a hollow cylindrical body 6 having a polygonal cross-section (more preferably, as shown in FIG. 1 , a regular polygonal cross-section), the The hollow cylindrical body 6 is made by bending along a longitudinal fold line forming the vertices 13 of the polygonal cross-section. Preferably, the fold lines are generated by pushing the longitudinal edges into and/or along the sheet of bendable material. However, any other way of producing a cylindrical body is possible.

For example, the cylindrical body 6 has in this case an odd number of vertices and between two adjacent vertices 13 a seam 2 is provided, the last generated fold line being the fold line opposite the seam 2 . The inventors have found that such bending of the sheet 14 of bendable material is such that upon pushing the longitudinal edges into and/or along the sheet 14 of bendable material to create the fold lines The longitudinal edges can then be more easily rolled up between the first edge 3 and the second edge 4 before the seam 2 is created. However, the cylindrical body 6 may also comprise an even number of vertices.

In case the cylindrical body 6 has a circular cross-section, it is preferably made by crimping at least one sheet 14 of bendable material, preferably metal.

Although, as shown in FIGS. 3 and 5 , it is preferred that the cylindrical body 6 is made of a single bent sheet 14 , as discussed above, the cylindrical body 6 may also be made of side walls 7 forming a circumference. Several of the different parts of are made of bent sheets 14 .

Preferably, the side wall 7 and fastening means 5 are arranged to disengage the fastening means 5 to separate along the splice 2 when an impact occurs at the impact location 15 on the street pole 1 and the cylindrical body 6 is Set at impact position 15.

Preferably, the side walls 7 and the fastening means 5 are arranged to disengage the fastening means 5 along the splice 2 upon impact with the vehicle 16 . The vehicle 16 may be any vehicle 16 known to those skilled in the art, such as an automobile, truck, motorcycle, etc., preferably equipped with a motor.

This is particularly advantageous for street columns 1 , preferably for the first part 18 of street columns 1 arranged to be fixed to the ground, since such columns 1 are usually located close to the road where traffic flows through the street column 1 set up.

In the context of the present application, impact, for example, means when such a vehicle 16 travels at, for example, above 0 km/h, above 5 km/h, above 10 km/h, above 20 km/h or above 30 km/h or even more The impact caused by high speed driving into the first part 18 of the street pole 1 . However, when the first part 18 of the street pole 1 is not hit by a vehicle 16, it is necessary to enable the side wall 7 and the fastening means 5 to resist the normal forces acting on the first part 18 of the street pole 1, such as for example changing wind, Relatively small impacts caused by, for example, parked vehicles, etc.

An example of a vehicle striking a first part 18 of such a street pole 1 is shown in Figures 4 and 6a-6d.

When the first part 18 of the street pole 1 is struck, the first edge 3 and the second edge 4 of the side wall 7 move away from each other as described and the fastening means 5 disengage from the edges 3 , 4 . When the impact is strong enough, the first edge 3 and the second edge 4 move further and further apart until the fastening means 5 then break free. This process is repeated until the impact is completely absorbed. Due to the impact, the first edge 3 and the second edge 4 can keep moving away from each other until the circumferential side wall 7 is fully unfolded and becomes substantially flat.

Preferably, the first part of the street pole 1 is arranged not to detach from its base layer upon impact, but remains fixed to its base layer, so that the energy of the impact can be absorbed until the speed of the vehicle 16 striking the street pole 1 is significantly reduced. Thus, after impact of the vehicle 16 with the first part 18 of the street pole 1, the risk of the vehicle 16 hitting a further obstacle after impacting the first part 18 of the street pole 1 is significantly reduced. In order to achieve this connection of the first part 18 of the street column 1 to the base, as discussed above, the first end is preferably cast into the cement. However, this is not critical to the invention and any other connection of the first part 18 of the street column 1 to the base layer may be used.

A vehicle 16 striking the street pole 1 results in striking the first part 18 of the street pole 1 at the impact location 15 . The preferably hollow cylindrical body 6 then separates at the impact location 15 . Next, when the impact is sufficiently large, as shown in FIGS. The other part is folded in the direction of the vehicle 16, as shown in FIG. 6d. By keeping the first part 18 of the street pole 1 fixed to the ground, the kinetic energy of the vehicle 16 can be absorbed until the speed of the vehicle 16 decreases. When the impact location 15 is moved along the longitudinal direction 8 of the first part 18 of the street pole 1 , the first edge 3 and the second edge 4 at the moved impact location 15 are kept away from each other along the width direction 11 of the splice 2 Move in such a way that the fastening device disengages and the splice 2 separates in the longitudinal direction 8 until the speed of the vehicle 16 is significantly reduced. Preferably, after impact with the first part 18 of the street pole 1, the speed of the vehicle 16 is reduced such that the speed measured after 12m after the initial impact is below 50 km/h.

When the vehicle 16 impacts on the first portion 18 of the street pole 1, the impact-absorbing street pole 1 absorbs at least a portion of the energy generated during the impact, thereby reducing the deformation of the vehicle 16 upon impact and the impact on the vehicle 16. The occupant causes less excessive sudden drop in acceleration with respect to time, and as shown in FIG. A jackknife effect, for example as shown in FIG. 4 , in which the street pole 1 bends and the bent portion of the street pole 1 presses the vehicle 16 . FIG. 6 d no longer shows the extension 17 because it has been dropped close to the vehicle 16 , for example. Since, for example, the length of the curved portion of the street pole 1 is reduced compared to the street poles of the prior art, and this curved portion only includes the first portion 18 of the street pole 1, the length of the pole 1 is reduced and when the vehicle 16 hits When the momentum of this bending portion is reduced, damage to the vehicle 16 and the risk of injuring the occupants of the vehicle 16 are limited.

Since the extension 17 separates from the first part 18 after the impact, the material of the extension 17 is not so critical to the invention and can basically be selected by a person skilled in the art according to the envisaged application. The extension may for example be a hollow part, such as a bent sheet metal, or even solid, such as wood.

If present, the portion that folds in the direction of the vehicle 16 may fold onto or close to the vehicle 16 . When the street pole 1 is arranged to fold close to the vehicle, the occupants of the vehicle are increasingly protected.

A preferably deformable cylindrical body 6 has to be arranged at the impact location 15 in order to be able to absorb the energy of the impact. Therefore, preferably, the preferably cylindrical body 6 arranged to separate upon impact is arranged at a height at which the vehicle 16 is likely to impact. For example a cylindrical body 6 is arranged close to the base layer. However, preferably, as shown in FIGS. 1 and 2 , the cylindrical body 6 extends in the longitudinal direction 8 substantially along the entire length of the first portion 18 of the street column 1 . When the seam 2 extends substantially along the entire length of the street column 1, greater impacts can be absorbed, because the separation by the cylindrical body 6, the disengagement of the fastening means 5 and the unfolding of the cylindrical body 6 affect the The absorption by impact can continue along the entire length of the street column 1 . The same effect can also be achieved when the first part 18 of the street column 1 consists of a continuous cylindrical body 6 as shown in FIG. 2 .

Preferably, the cylindrical body 6 in such an embodiment is made of a metal such as iron, aluminum or the like, for example. More preferably, the cylindrical body 6 is made of iron.

Preferably, the material of the side wall 7 of the cylindrical body 6 has a yield strength Re of between 50 N/mm ² and 700 N/mm ² , preferably, the yield strength is between 200 N/mm ² and 550 N/mm 2 ² , more preferably, the yield strength is between 330N/mm ² and 420N/mm ² .

Preferably, the material of the side wall 7 has a tensile strength Rm between 50N/mm ² and 1350N/mm ² , preferably, the tensile strength is between 350N/mm ² and 1050N/mm ² , more preferably Preferably, the tensile strength is between 600N/mm ² and 700N/mm ² , more preferably, the tensile strength is at least 410N/mm ² , for example, the tensile strength is between 410N/mm ² and 700N/mm 2 between ^mm2 .

Preferably, the material of the side wall 7 has a minimum elongation before failure A80 of at least 5%, preferably at least 15%, more preferably at least 20%.

Preferably, the side wall 7 has a thickness between 20 mm and 0.5 mm, preferably between 10 mm and 1 mm, more preferably between 5 mm and 1 mm, even more preferably, The thickness is 2 mm.

Preferably, the cylindrical body 6 has a diameter 12 at the impact location 15 of between 50mm and 500mm, preferably between 150mm and 400mm, more preferably between 200mm and 350mm between.

Preferably, the width 11 of the splice 2 is at least 0.1% of the circumference of the cylindrical body 6, preferably the width is at most 100% of the circumference of the cylindrical body 6, more preferably the The width is between 0.1% and 10% of the circumference of the cylindrical body 6, most preferably the width is between 2% and 3.5% of the circumference of the cylindrical body 6.

A first example is the first part 18 of the street column 1 consisting of a single cylindrical body 6 having a length of about 6m to 7m at the first end of the first part 18 of the street column 1 The diameter in the vicinity of approximately 320 mm and the substantially constant width 11 of the seam 2 of 20 mm is 2.6% of the diameter 12 in the vicinity of the first end.

Another example is the first part 18 of the street column 1 consisting of a single cylindrical body 6 having a length of approximately 10 m and a diameter of 208 mm near the first end of the street column 1 And a substantially constant width 11 of the seam 2 of 20 mm, which is 3.06% of the diameter 12 in the vicinity of the first end.

According to a further example, the first part 18 of the street column 1 consisting of a single cylindrical body 6 has a length of about 8 m (2 m of this length is placed in the ground), and the street column 1 at ground level The diameter of the first portion 18 near the first end is approximately 322mm. The elongated extension has a height of about 14m. The elongate extension 17 and the first portion 18 are arranged such that the elongate extension 17 slides over the first portion 18, wherein the diameter of the first portion 18 at the position where the elongate extension 17 slides over it 234 mm, and the diameter of the elongated extension 17 at this location is about 260 mm, the first portion 18 and the elongated extension 17 overlap by about 500 mm. Thus, the overall height of the street column 1 is about 21.5m, of which about 2m is placed in the ground. In such an embodiment, the hollow cylindrical body 6 preferably has a polygonal cross-section, for example a regular convex nonagonal polygon, for example with three seams 2 , between the seams 2 there are three vertices 13 or two edges between the vertices 13 .

Preferably, the fastening device 5 has a shear strength (this is the strength in the direction of the width 11 of the splice 2 ) of between 2000N and 7000N, preferably between 3000N and 6000N , more preferably between 4000N and 5000N, most preferably between 4100N and 4500N.

Preferably, the fastening means 5 are rivets, as the inventors have found that they provide a good and easy way of interconnecting the first edge 3 and the second edge 4, while the rivets are arranged so that when the first edge 3 and the second edge 4 The second edge 4 disengages when moved away from each other and enables easy connection of the first edge 3 and the second edge 4 to each other. However, any other fastening means 5 may be used instead, as described above.

The first portion 18 of the street column 1 may be arranged such that the width 11 of the splice 2 extends substantially in a direction substantially parallel to the direction of oncoming traffic flow.

More specifically, the width 11 of the splice 2 extends substantially along a direction having an angle with the direction of the oncoming traffic flow between 0° to 90°, 0° to 180°, 0° to 45° Between, preferably, between 10° and 30°, more preferably, between 15° and 25°, most preferably, 20°.

However, it is also possible to arrange the splice 2 in any other possible direction. The first portion 18 of the street column 1 may eg be arranged such that the width 11 of the splice 2 extends substantially in a direction substantially perpendicular to the direction of oncoming traffic flow or in any other possible direction.

Claims (22)

1. An impact-absorbing street column (1) extending substantially along a longitudinal direction (8), characterized in that said street column (1) comprises an elongated extension (17) at a predetermined at the height of the street column (1) can be detachably connected to the first part (18) of the street column (1), so that when impacting on the first part (18) of the street column (1), the elongated extension ( 17) Detach from the street column (1). 2. The impact-absorbing street column (1) according to claim 1, characterized in that the height of the first part (18) of the street column (1) is smaller or larger than the elongated extension (17) the height of. 3. The impact-absorbing street column (1) according to any one of the preceding claims, characterized in that the elongated extension (17) and/or the first part of the street column (1) ( 18) Comprising a cylindrical body extending circumferentially around said longitudinal direction. 4. The impact-absorbing street column (1) according to claim 3, characterized in that at said predetermined height the circumference of said first part (18) of said street column (1) is smaller than said The perimeter of the elongated extension (17). 5. Shock-absorbing street pole (1) according to claim 3 or 4, characterized in that the cylindrical body (6) of the first part (18) is hollow and comprises a At least one overlapping portion (2) of the first edge (3) and the second edge (4) of the circumferential side wall (7) of the cylindrical body (6) comprising For fastening means (5) interconnecting said first and second edges (3, 4), said seam (2) has a length extending substantially parallel to said longitudinal direction (8) ( 10). 6. The impact-absorbing street pole (1) according to claim 5, characterized in that the seam (2) has a width (11) extending substantially in the circumferential direction (9). 7. The impact-absorbing street pole (1) according to any one of claims 5 to 6, characterized in that the side wall (7) and the fastening device (5) are arranged so that when in the When an impact occurs at the impact position (15) on the street pole (1), the fastening device (5) is disengaged and separated along the splicing portion (2), and the cylindrical body (6) is located at said impact location (15). 8. The impact-absorbing street column (1) according to any one of claims 5 to 7, characterized in that, the material of the side wall (7) has a yield strength (Re), which is between 50N /mm ² to 700N/mm ² , preferably, between 200N/mm ² to 550N/mm ² , more preferably, between 330N/mm ² to 410N/mm ² . 9. The impact-absorbing street column (1) according to any one of claims 5 to 8, characterized in that the material of the side wall (7) has a tensile strength (Rm) between Between 50N/ ^mm2 and 1350N/ ^mm2 , preferably between 350N/ ^mm2 and 1050N/ ^mm2 , more preferably between 600N/ ^mm2 and 700N/ ^mm2 . 10. The impact-absorbing street column (1) according to any one of claims 5 to 9, characterized in that the material of the side wall (7) has a minimum elongation before failure (A80), which The elongation before failure is at least 5%, preferably 15%, more preferably 21%. 11. The impact-absorbing street pole (1 ) according to any one of claims 5 to 10, characterized in that the side wall (7) has a thickness between 20 mm and 0.5 mm, preferably, The thickness is between 10 mm and 1 mm, more preferably the thickness is between 5 mm and 1 mm, even more preferably the thickness is 2 mm. 12. The impact-absorbing street pole (1) according to any one of claims 3 to 11, characterized in that the cylindrical body (6) of the first part (18) is in the impact position ( 15) has a diameter (12) between 50mm and 500mm, preferably between 150mm and 400mm, more preferably between 200mm and 350mm. 13. The impact-absorbing street pole (1) according to any one of claims 5 to 12, characterized in that the seam (2) has a width (11) of at least the cylindrical body (6) 0.1% of the circumference, preferably the width is at most 100% of the circumference, more preferably the width is between 0.1% and 10% of the circumference, most preferably the width Between 2% and 3.5% of that circumference. 14. The impact-absorbing street pole (1) according to any one of claims 5 to 13, characterized in that the fastening device (5) has a shear strength between 2000N and 7000N Between, preferably, between 3000N and 6000N, more preferably, between 4000N and 5000N, most preferably, between 4100N and 4500N. 15. The impact-absorbing street pole (1 ) according to any one of claims 5 to 14, characterized in that the fastening means (5) are rivets. 16. Street column (1 ) according to any one of claims 3 to 16, characterized in that the cylindrical body (6) has a circular cross-section. 17. The impact-absorbing street pole (1) according to any one of claims 3 to 16, characterized in that the cylindrical body (6) of the first part (18) has a regular polygonal transverse section. 18. The impact-absorbing street column (1) according to claim 17, characterized in that the seam (2) is between two adjacent vertices (13) of the regular polygonal cross-section The room is basically positioned at the center. 19. The impact-absorbing street pole (1 ) according to claim 16 or 17, characterized in that the regular polygonal cross-section comprises an odd number of vertices (13). 20. The impact-absorbing street pole (1) according to any one of claims 5 to 19, characterized in that the side wall (7) constituting the circumference of the cylindrical body (6) comprises At least one bent metal sheet (14). 21. The impact-absorbing street pole (1 ) according to claim 20, characterized in that the sheet metal (14) is made of iron. 22. The impact-absorbing street pole (1 ) according to any one of the preceding claims, characterized in that an attachment (19) is connected to the elongate extension (17).