EP3081695A1 - Strommast mit abscherender kupplungsanordnung - Google Patents

Strommast mit abscherender kupplungsanordnung Download PDF

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Publication number
EP3081695A1
EP3081695A1 EP16165139.3A EP16165139A EP3081695A1 EP 3081695 A1 EP3081695 A1 EP 3081695A1 EP 16165139 A EP16165139 A EP 16165139A EP 3081695 A1 EP3081695 A1 EP 3081695A1
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EP
European Patent Office
Prior art keywords
end portion
base
utility pole
holding elements
column
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP16165139.3A
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English (en)
French (fr)
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EP3081695B1 (de
Inventor
Andrew DEN BAKKER
John HAAKMAT
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nedal Aluminium Bv
Original Assignee
Hunter Douglas Industries BV
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Filing date
Publication date
Application filed by Hunter Douglas Industries BV filed Critical Hunter Douglas Industries BV
Publication of EP3081695A1 publication Critical patent/EP3081695A1/de
Application granted granted Critical
Publication of EP3081695B1 publication Critical patent/EP3081695B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
    • E01F9/00—Arrangement of road signs or traffic signals; Arrangements for enforcing caution
    • E01F9/60—Upright bodies, e.g. marker posts or bollards; Supports for road signs
    • E01F9/623—Upright bodies, e.g. marker posts or bollards; Supports for road signs characterised by form or by structural features, e.g. for enabling displacement or deflection
    • E01F9/631—Upright bodies, e.g. marker posts or bollards; Supports for road signs characterised by form or by structural features, e.g. for enabling displacement or deflection specially adapted for breaking, disengaging, collapsing or permanently deforming when deflected or displaced, e.g. by vehicle impact
    • E01F9/635—Upright bodies, e.g. marker posts or bollards; Supports for road signs characterised by form or by structural features, e.g. for enabling displacement or deflection specially adapted for breaking, disengaging, collapsing or permanently deforming when deflected or displaced, e.g. by vehicle impact by shearing or tearing, e.g. having weakened zones

Definitions

  • the present invention relates to a utility pole that comprises a base for mounting into the ground, a column for carrying a utility member such as a lamp, a traffic sign, a traffic light, a camera or the like, and a coupling assembly for connecting the column to the base in a separable manner.
  • the coupling assembly allows the column to become separated from the base when lateral forces on the utility pole exceed a certain threshold value such as during an impact with a vehicle.
  • the coupling assemblies can be divided into two types:
  • frangible coupling assembly An example of a frangible coupling assembly is disclosed in EP2400060 of applicant.
  • Base and column of the utility pole are connected to each other via a breakaway sleeve that is made of a brittle material designed to break when lateral impact forces on the utility pole exceed a certain value.
  • a breakaway sleeve that is made of a brittle material designed to break when lateral impact forces on the utility pole exceed a certain value.
  • a stiff, hard and/or sharp accessory is provided inside or around a lower portion of the pole. When subject to lateral impact forces, this accessory cuts into the pole, causing it to become severed.
  • frangible coupling assemblies usually comprise relatively few components that are easy to assemble.
  • a disadvantage is that their breaking behavior depends strongly on the material properties of the frangible components. These material properties may vary in different directions and often cannot be controlled accurately enough to make the pole break in a reliable, predictable manner. This may prove in particular critical with impacts occurring at low velocities, where the kinetic energy transferred to the pole may simply not be sufficient to cause the coupling to break. Shear-off coupling assemblies tend to perform better in this respect, as the impact forces only need to overcome frictional force between the various detachable components, which can be more readily controlled.
  • a shear-off coupling is disclosed in GB1087073 , featuring a pole with a base and a column that are each provided with an external flange. These flanges are secured to each other via bolt connections that extend through recesses in the flanges. The recesses are open in a radially outward direction, allowing the bolt connections to release from the recesses when the lateral forces on the pole exceed the frictional forces between the flanges and bolt connections.
  • a disadvantage of this known coupling assembly is that the flanges an bolt connections project from the pole and may therefore cause damage or injury to the environment. Moreover, the flanges and bolt connections lie exposed to weather, dirt and other abrasive conditions, which may affect their shear-off properties, especially their reliability.
  • EP2014850 therefore propose to reverse the radial orientation of the flanges and recess openings so as to extend radially inward into the pole. This brings the advantage that the bolt connections can be located inside the pole, protected against external influences.
  • the release direction of the bolts is reversed as well. This is a problem, since the radial inward release directions of adjacent bolts converge, i.e. intersect, causing the bolts to collide or worse, to block each other's release. Therefore, additional measures are needed to ensure proper release. For instance, the contact surfaces between flanges and adjacent bolts need to be spaced apart in vertical direction. Also, spacers are needed to keep adjacent bolts sufficiently apart in circumferential direction. Furthermore, special arrangements are needed to stabilize the bolts in radial and circumferential direction.
  • each bolt connection already comprises a bolt, a nut and two washers, which all need to be assembled together, making these known coupling assemblies cumbersome and expensive to manufacture and susceptible for failures, such as assembly errors.
  • European Standard EN12767 defines impact classifications and a number of impact tests, that take into account different safety levels for occupants of a vehicle, in particular the Acceleration Severity Index (ASI), i.e. the accelerations of the body of a vehicle occupant during the impact, and the Theoretical Head Impact Value (THIV), i.e. the calculated velocity with which the head of the occupant would hit the windscreen.
  • ASI Acceleration Severity Index
  • THIV Theoretical Head Impact Value
  • the European Standard considers three categories of light poles: high energy absorbing (HE), meaning that most energy of the impact will be transferred from the vehicle to the pole and the velocity of the vehicle will be largely reduced if not zero after the impact, low energy absorbing (LE) and non-energy absorbing (NE).
  • the utility pole according to the present invention comprises a base, a column and a coupling assembly of the shear-off type.
  • the coupling assembly comprises a first end portion provided at an upper end of the base, a second end portion provided at a lower end of the column and a plurality of holding elements for coupling the first and second end portion to each other.
  • the first and second end portion are each provided with one or more recesses, extending in circumferential direction and having their open side facing in radial outward direction.
  • Each holding element comprises a first formation, a second formation and an interconnecting base part.
  • the first and second formation are configured to fit into a recess of the first and second end portion respectively.
  • the recesses of the first and second end portion are arranged and dimensioned to extend within the contour of the base and column, in radial direction.
  • the holding elements can release or disengage therefrom in radial outward direction. Yet at the same time, the holding elements, or at least the first and second formation thereof, can lie within the radial contour of the utility pole, safely enclosed by the base and column, shielded from external influences. Also, since the holding elements may be largely or entirely accommodated within the radial contour of the pole, the coupling assembly may form less of a hazard to the outside world.
  • the holding elements may advantageously be mounted side by side, in abutting relationship with one another, which may help to stabilize them in circumferential and radial direction without the need for separate provisions. Accordingly, a simple yet effective coupling assembly may be obtained with a minimum of components that can be easily assembled. Moreover, said components do not or hardly project from the pole in assembled condition and therefore will have no or little exposure to external influences.
  • the first end portion may have a single first recess, extending around the entire outer circumference or a substantial part thereof.
  • the single recess may for instance be ring shaped, in the second case be ring segment shaped.
  • Such a single recess is easy to manufacture and provides ease of assembly, especially if it spans the entire circumference, as there will be no need to align said recess during assembly with a second recess of the second end portion.
  • the first formations of the holding elements can be mounted at any desired location along the first recess. Also, the ring shape will not have any obstructions in radial outward direction so is ideal for the first formations to release from.
  • the first end portion may comprise a plurality of first recesses.
  • These first recesses may for instance have the shape of ring segments. They may confine movement of the first formations in circumferential direction and thus help to prevent rotation of the column relative to the tube, therewith enhancing the torsional resistance of the pole.
  • the first recesses are arranged at regularly or evenly spaced intervals along the outer circumference. In such case, the shear-off coupling assembly can perform well in every radial direction, regardless of the impact direction.
  • the first and second end portion may both be provided with a single recess, or both be provided with a plurality of recesses, or one may be provided with a single recess and the other one with a plurality of recesses.
  • the first formations may be ring segment shaped.
  • Such shape offers good releasability in radial outward direction. Also, it allows a number of first formations to be mounted in abutting, side by side relationship in circumferential direction. This may add to the stability of the assembly in circumferential direction, as the first formations will prevent each other from shifting in circumferential direction. It may also contribute to ease of assembly as installation may be done in an intuitive, foolproof manner.
  • the radially outward facing surfaces of the first formations may together form a cover, closing off the or each recess in which they are mounted, thus shielding their radial inward located portions and in particularly their contact surfaces against external influences such as ingress of dirt.
  • the ring segmented first formations may for instance extend over an angle of about 15° to 180°, corresponding to a maximum of 24, respectively 2 first formations per utility pole.
  • the releasability of the first formations is served by increasing their number in circumferential direction, i.e. by reducing their ring segment angle.
  • the number of holding elements may be varied, depending on for instance the dimensions of the pole, the expected external condition to which the pole will be exposed, as well as the expected impact conditions.
  • the second formations may be ring segment shaped.
  • the same considerations as listed above for the first formations apply mutatis mutandis for such ring segment shaped second formations.
  • the base part may be ring segment shaped.
  • the same considerations as listed above for the first formations apply mutatis mutandis for such ring segment shaped base parts.
  • only the first or second formations may be ring segment shaped.
  • the other ones may have a different shape, e.g. a disc shape.
  • both the first and second formations may be ring segment shaped.
  • the base part may be ring segment shaped as well.
  • the base part may for instance be shaped as one or more rods having one end connected to the first formation and an opposite end connected to the second formation.
  • Such rod or rods could then also form part of an anti-rotation provision, in cooperation with a suitable recess or slot in a mating surface of the first and/or second end portion, as will be described in further detail below.
  • the first formation, second formation and base part may be integrally formed together to form a one-piece holding element, or be preassembled prior to its mounting such that the holding element can be mounted as a one-piece component.
  • the first formation, second formation and base part may be integrally formed together so as to form a one-piece holding element, or are preassembled prior to the mounting of the holding element in a first and second recess.
  • the holding elements do not have to be configured as clamping means, such as the complex prior art bolt connections, but instead can be configured as one-piece holding element of fixed dimensions, designed to block separation of the first and second end portion in longitudinal direction.
  • a utility pole having a base, a column and a shear-off coupling assembly for connecting the column to the base in a separable manner, wherein the coupling assembly comprises one-piece holding elements as described above, without the limitations of claim 1.
  • such coupling assembly may comprise a recessed first end portion provided at an upper end of the base, a recessed second end portion provided at a lower end of the column, and a plurality of one-piece holding elements, each holding element comprising a first formation configured to fit into a recess of the first end portion and be releasable therefrom in a radial direction, a second formation configured to fit into a recess of the second end portion and be releasable therefrom in a radial direction and a base part interconnecting the first and second formation in longitudinal direction.
  • the holding element may have a substantially C-shaped cross section, with the first and second formations forming the legs of the C.
  • Such holding element is easy to manufacture and easy to install.
  • the holding element can simply with its first and second formation be inserted into a first and second recess of the first and second end portion respectively, with the rear side of the base part facing radially outward, forming a protective cover that closes off the recesses and shields the first and second formation against external influences.
  • adjacent holding elements may abut each other in circumferential direction with their respective first formations, second formations and/or base parts. This may help prevent shifting of the holding elements in circumferential direction.
  • the radial outward facing surfaces of the holding elements may together form a protective surface that shields the more inward located portions against external influences.
  • the first formations, second formations and/or base parts of the holding elements may together span the entire circumference of the first and second end portion so as to form a closed or substantially closed ring in assembled condition.
  • this may help to ensure that the shear-off assembly may perform properly in every direction, regardless of the impact direction on the pole.
  • the first end portion may extend within the contour of the base in radial direction and the second end portion may extend within the contour of the column in radial direction.
  • the first and second end portion may together define an annular cavity for accommodating the holding elements, wherein the holding elements do not project beyond the contour of the base and column in radial direction and preferably have a radial outer surface that lies flush with the outer surface of the base and column in assembled condition.
  • a radially outward facing surface of the holding elements may lie flush with the outer surface of the base and/or the column.
  • the pole can have a smooth outer surface, free from potentially hazardous projections.
  • an anti-rotation provision may be provided between contact surfaces of at least one of the holding elements and the first and/or second end portion, to prevent displacement of the holding element in circumferential direction. This in turn may help to prevent rotation of the column with regard to the base and may thus enhance the pole's torsion stiffness.
  • the anti-rotation provision may have a main dimension that is much larger than its other dimensions, i.e. its directions orthogonal to said main direction.
  • the anti-rotation provision may for instance comprise two mating profiles, such as a key and slot.
  • the anti-rotation provision may be provided between a radial inward facing surface of the holding element and a radial outward facing surface of the first and/or second end portion. In such case, the anti-rotation provision preferably has a main direction extending in longitudinal direction of the utility pole.
  • such an anti-rotation provision may be formed by the base part itself, which may be received in a recess, slot or notch provided in a mating surface of the first and/or second end portion, more particularly in an edge portion thereof that extends between the respective first and second recesses and the free edges of the end portions.
  • the anti-rotation provision may be provided between a downward facing surface of the holding element and an upward facing surface of the first end portion, and/or between an upward facing surface of the holding element and a downward facing surface of the second end portion.
  • the anti-rotation provision preferably has a main direction extending in radial direction. Thanks to aforementioned main directions of the anti-rotation provision, the torsional stiffness of the pole can be enhanced without compromising the releasability of the holding element in radial direction.
  • an additional or alternative anti-rotation provision may be provided between contacting end surfaces of the first and second end portion, to prevent rotation of said portions relative to each other and enhance the torsional stiffness of the pole.
  • the anti-rotation provision has a main direction extending in radial direction so as not to compromise radial movement of the second end portion with respect to the first end portion.
  • the anti-rotation provision may extend radially outward so as to extend between adjacent holding elements.
  • retention means may be provided to help retaining the holding elements in radial direction.
  • the retention means may for instance comprise an adhesive or an adhesive tape, arranged between mating surfaces of the holding element and the first and/or second end portion.
  • the retention means may comprise an elongated flexible element such as for instance a string or wire, extending around the outer surface of the holding elements.
  • the holding elements may be provided with an indentation, extending in circumferential direction along their outer surface.
  • indentation may advantageously accommodate the retention means, and may for instance prevent it from being tampered with or from becoming inadvertently released, or from shifting up or downward, or from projecting radially beyond the outer contour of the pole.
  • the indentation may extend near an upper and/or lower edge of said outer surface.
  • the elongated retention element may be made of rubber, silicon or a similar material, so that it can additionally serve as a sealing element, to protect the interior of the pole and coupling assembly against moisture, dirt and the like that could otherwise could cause for instance corrosion and other damage to said interior.
  • a sealing element to protect the interior of the pole and coupling assembly against moisture, dirt and the like that could otherwise could cause for instance corrosion and other damage to said interior.
  • the properties of the retention means may be selected such that their retention strength is high enough to keep the holding elements in assembled condition, but weak enough to be broken by the impact forces.
  • the retention means may serve to control, more particularly increase the threshold values at which the holding elements and pole disintegrate.
  • the coupling assembly may comprise an even number of holding elements. This allows pairs of holding elements to be arranged at diametrically opposed positions, resulting in a symmetric force distribution on the respective holding elements during an impact which is believed to result in optimal release behavior.
  • the first end portion may form integral part of the base.
  • the first end portion may be part of a separate interface member, that can be secured to said base, for instance in an open end thereof.
  • the latter option has the advantage that the base and end portion can be made from different wall thicknesses and/or different materials with different material properties, adapted to the respective tasks of said components in the utility pole.
  • the first end portion and interface member may for instance be made of metal or a metal alloy. Also, the end portion may be easier to manufacture when provided on a separate interface member.
  • the second end portion mutatis mutandis, i.e. the second end portion may be part of a second interface member that in assembled condition is secured to the column, for instance in an open end thereof.
  • the first and second interface members may for instance be secured to the base and column respectively by means of an adhesive or epoxy, adhesive tape, welding, mechanical fastening means or any other suitable securing means, preferably strong enough to prevent movement of the interface members in longitudinal and circumferential direction of the base and column respectively.
  • the first and second interface member may each be provided with a collar.
  • Such collar may help to determine and/or limit the installation depth of the interface member with regard to the base and column respectively.
  • the collar of the first interface member in assembled condition, may rest on an upper edge of the base and the collar of the second interface member may support a lower edge of the column.
  • the gravitational forces of the column can to a large extend be guided directly into the base via the collars, thus bypassing the adhesive or other securing means between the interface members and the column and base respectively, which may add to their lifetime.
  • the first and second interface members may be made of metal or a metal alloy.
  • the holding elements may be made of metal, a metal alloy or any suitable plastic.
  • the first and second end portion, and more preferably the first and second interface member may be identical, thereby reducing the number of different components and making assembly more foolproof and easier.
  • a separation surface of the coupling assembly may be located at a certain distance H above ground level (G). This may help the pole to disintegrate more readily and predictable.
  • the separation surface is located slightly below the expected impact level so as to allow the separation process to take place predominantly by purely lateral impact forces, rather than by bending forces that would be acting on the coupling assembly were the impact to take place at a much higher location than said separation surface.
  • Figure 1 shows an embodiment of a utility pole 1 according to the invention, in longitudinal cross-sectional view.
  • the pole has a longitudinal direction X and a lateral or radial direction R.
  • the pole 1 comprises a base 3 (for instance a cylinder) with an outer contour B, a column 4 (for instance a cylinder) with an outer contour C, and a shear-off coupling assembly 10 for coupling the column 4 to the base 3 in a separable manner.
  • the base 3 is with one end inserted in the ground, so as to provide stability to the column 4 and withstand lateral loads, for instance wind load or the like.
  • the other end of the base 3 may lie flush with ground level G but preferably projects over a limited distance h, as illustrated, so as to be visible and readily accessible for connecting column 4.
  • the projecting distance h of the base 3 may be limited, for instance to about 500 mm.
  • Figure 2a shows a more detailed view of the coupling assembly 10 of Figure 1 . It comprises a first end portion 18 provided at an upper end of the base 3 and a second end portion 19 provided at the lower end of the column 4.
  • the first and second end portions 18, 19 may be integrally formed with the base 3 and column 4 respectively.
  • the first and second end portions 18, 19 may be part of a separate first and second interface member 11, 12.
  • These interface members 11, 12 may be secured to the base 3 and column 4 respectively with any suitable securing means, such as adhesive, welding, mechanical locking means, etc.
  • the first and second interface member 11, 12 may be provided with a first, respectively second collar 8, 9 as best seen in Figures 2A and B .
  • first collar 8 may rest upon the upper edge 5 of the base 3, and the second collar 9 may support the lower edge 6 of the column 4 so as to provide for a stable configuration.
  • the outer diameter of the first collar 8 does not extend beyond the contour B of the base, more preferably has an outer diameter that is equal to that of the base 3. Similar for the outer diameter of the second collar 9: it preferably does not extend beyond the contour C of the column, more preferably is equal to the outer contour of the column 4.
  • the first and second end portion 18, 19 each comprise a free edge 15, 16 that in connected condition are in abutment with each other.
  • the first end portion 18 further comprises at least one first recess 17A, extending in circumferential direction in its outer surface, at a distance from the free edge 15.
  • the recess 17A may at its lower side be bordered by aforementioned first collar 8, as illustrated.
  • the second end portion 19 may have an identical configuration, that is, it may comprise a second recess 17B, extending in circumferential direction in its outer surface, at a distance from its free edge 16.
  • the second recess 17B may at its upper side be bordered by the second collar 9, as illustrated in Figures 2a and 2b .
  • first and second recess 17A, B extend around the entire circumference of the first and second end portion 18, 19.
  • the single recesses 17A,B could be replaced by a plurality of shorter recesses, distributed along the circumference of the first and second end portion 18, 19, preferably at regularly space intervals.
  • the first and second recesses 17A,B are arranged to receive a plurality of holding elements 20, that is at least two holding elements 20, for connecting the end portions 18, 19 together.
  • a holding element 20 has the shape of a ring segment with a substantially C-shaped cross section. More particularly, the holding element 20 includes a base part 21 that along its upper and lower edge is provided with a first and second formation 22, 23, each extending substantially perpendicular from the base part 21 thus forming the legs of the C.
  • the holding element 20 can be made of any suitable material such as metal, a metal alloy or a suitable plastic material.
  • the first and second formations 22, 23 are designed to fit in the aforementioned first and second recesses 17A,B of the first and second end portion 18, 19, as shown in Figure 2b .
  • a plurality of such holding elements 20 may be assembled into said recesses 17A,B, as shown in Figures 4 and 5 .
  • the holding elements 20 may together surround the outer circumference of the end portions 18, 19, wherein adjacent ends of the holding elements 20 may abut each other in circumferential direction.
  • the number of holding elements 20 may depend on the angle over which the individual holding elements 20 extend in circumferential direction. This angle may for instance vary between about 15° and 180°. Accordingly, the number of holding elements 20 may for instance vary from 24 to 2. Of course other quantities are possible.
  • Holding elements 20 arranged near the leading edge of the second end portion 19 will be entailed along and exit the recesses 17A,B in radial outward direction. Holding elements 20 arranged near the trailing edge of the second end portion 19 may remain with their first formation 22 engaged in the first recess 17A. However, their second formation 23 may disengage from the second recess 17B as the trailing edge of the second end portion moves away therefrom, in radial direction.
  • the holding element 20 may at its rear side, i.e. the side that in assembled condition faces radially outward, be provided with at least one indentations 29.
  • This indentation 29 may for instance extend along an upper edge of said rear side.
  • a second indentation 29 may extend along a lower edge of said rear side.
  • the or each indentation 29 may together with the respective collars 8, 9 enclose a groove for accommodating a retention element and/or a sealing element 31.
  • the faces of the collars 8, 9 that border said groove may be chamfered, as shown in Figures 2a and 2b .
  • the chamfer angle may for instance be about 20°.
  • the retention element 31 may for instance comprise a wire that may extend around the holding elements 20 so as to help retaining them in assembled condition.
  • the sealing element 31 may for instance be made of rubber, silicone, plastic or the like and may help prevent ingress of moisture, dirt, etc. in the interior of the coupling assembly 10 and utility pole 1.
  • the sealing element 31 may extend around the entire circumference of the assembly.
  • the retention element 31 and the sealing element 31 can be embodied in a single annular component that fulfils both tasks, i.e. retentions and sealing.
  • the sealing element 31 and retention element 31 may be provided as separate components.
  • the sealing element 31 may for instance be accommodated in one of the upper and lower grooves defined by the indentations 29 and the retention element 31 may be accommodated in the other groove.
  • the retention element does not need to be accommodated in a groove.
  • it may for instance include an adhesive tape, wound around the outer circumference of the holding elements 20 at some distance from the or each indentation 29.
  • the holding elements 20 and first and/or second end portion 18, 19 may further comprise one or more anti-rotation provisions to prevent displacement of the holding elements 20 and/or the end portions 18, 19 in circumferential direction and thus help increasing the torsion stiffness of the pole 1.
  • the anti-rotation provision may comprise mating profiles between contact surfaces of at least one holding element 20 and at least one of the end portions 18, 19 and/or between the free edges 15, 16 of said end portions 18, 19.
  • the mating profiles may for instance include a rod 30 as shown in Figure 3b , extending between the first and second formations 22, 23 of the holding element 20, substantially parallel to its base part 21.
  • the mating profiles may further include a longitudinal slot 28 extending in an edge portion 13, 14 of the first and/or second end portions 18, 19, between the recesses 17A,B and free edges 15, 16, as shown in figures 3a and 4 .
  • the rod 30 will be received in the slot 28 and thus prevent displacement of the holding element 20 in circumferential direction of the end portion.
  • rotation of the base and columns 3, 4 relative to each other may be prevented as well.
  • the anti-rotation provision will not affect the displacement freedom of the holding element 20 in radial outward direction, and thus will not compromise the shear-off performance of the coupling assembly 10.
  • the mating profiles may additionally or alternatively comprise one or more radial notches 32 provided in at least one of the free edges 15, 16 of the first and second end portion 18, 19, as shown in Figures 3a and 4 . If several radial notches 32 are provided, these may for instance be arranged at regularly spaced intervals in circumferential direction.
  • the mating profiles may further comprise a blocking member 33, designed to be received in the notch(es) 32. The blocking member 33 may extend beyond the outer circumference of the end portion 18, 19 into a slit or gap 34 between adjacent holding elements 20, as seen in figure 4 . As a result, displacement of the holding elements 20 in circumferential direction is prevented.
  • both end portions 18, 19 may be provided with one or more notches 32 in their free edges 15, 16 which may be aligned in assembled condition such that a blocking element 33 can be received in two opposed notches 32, thus preventing rotational movement of the first and second end portion 18, 19 relative to each other. This may add to the torsional stiffness of the shear-off assembly 10 and the utility pole 1.
  • holding elements 20 that can be used for connecting the first and second end portion 18, 19 may vary and may for instance range from 2 to 24, more preferably from 5 to 15, and most preferably from 7 to 13.
  • the holding elements 20 may but need not be of similar dimensions.
  • the holding elements 20 may for instance extend over an angle between 15° and 180°, more preferably between 20° and 120° and most preferably between 30° and 90°.
  • the interface members 11, 12 and the holding elements 20 may be formed from the same material.
  • This material may for example be an aluminum alloy having an Rp0,2 strength value of about 100-500 Mpa.
  • Selection of a suitable material may help to bring the overall strength of the utility pole 1 to a desired value.
  • the strength of the various components may alternatively or additionally be controlled by proper dimensioning of the diameter and/or wall thickness.
  • the utility pole 1 may have a uniform strength in column 4, coupling assembly 10 and base 3.
  • the coupling assembly 10 can be designed to be stronger than the column and/or base of the pole. This may be desirable in order for the complete utility pole to comply with normal use requirements, i.e. resistance to wind loads or the like.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Mutual Connection Of Rods And Tubes (AREA)
  • Road Signs Or Road Markings (AREA)
EP16165139.3A 2015-04-13 2016-04-13 Strommast mit abscherender kupplungsanordnung Active EP3081695B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL1041270A NL1041270B1 (en) 2015-04-13 2015-04-13 Utility pole with shear off coupling assembly.

Publications (2)

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EP3081695A1 true EP3081695A1 (de) 2016-10-19
EP3081695B1 EP3081695B1 (de) 2019-05-29

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019040466A1 (en) * 2017-08-25 2019-02-28 Pepco Holdings LLC UTILITY POST WITH ENERGY ABSORPTION LAYER

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL2032450B1 (en) 2022-07-12 2024-01-25 Nedal Aluminium B V Energy-absorbing utility pole

Citations (6)

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GB1087073A (en) 1963-09-11 1967-10-11 Turner Philip Wilson Lamp and other roadside standards
US5481835A (en) * 1989-05-12 1996-01-09 Adian Engineering Corporation Breakaway base and upper-separation joint
US20060024131A1 (en) * 2004-07-30 2006-02-02 Wiegand Kenneth E Collision safety device having a breakaway shear coupling
EP1741832A1 (de) 2005-07-06 2007-01-10 Alcoa Nederland B.V. Verkehrssicherheitsmast
EP2014850A1 (de) 2007-07-11 2009-01-14 Sapa Profiles NL B.V. Verbindungsstruktur für einen verkehrssicheren Balken
EP2400060A1 (de) 2010-06-24 2011-12-28 Hunter Douglas Industries B.V. Pfosten mit zerbrechlichem Rohrabschnitt

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1087073A (en) 1963-09-11 1967-10-11 Turner Philip Wilson Lamp and other roadside standards
US5481835A (en) * 1989-05-12 1996-01-09 Adian Engineering Corporation Breakaway base and upper-separation joint
US20060024131A1 (en) * 2004-07-30 2006-02-02 Wiegand Kenneth E Collision safety device having a breakaway shear coupling
EP1741832A1 (de) 2005-07-06 2007-01-10 Alcoa Nederland B.V. Verkehrssicherheitsmast
EP2014850A1 (de) 2007-07-11 2009-01-14 Sapa Profiles NL B.V. Verbindungsstruktur für einen verkehrssicheren Balken
EP2400060A1 (de) 2010-06-24 2011-12-28 Hunter Douglas Industries B.V. Pfosten mit zerbrechlichem Rohrabschnitt

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019040466A1 (en) * 2017-08-25 2019-02-28 Pepco Holdings LLC UTILITY POST WITH ENERGY ABSORPTION LAYER
US10435911B2 (en) 2017-08-25 2019-10-08 Pepco Holdings LLC Utility pole with energy absorbing layer
CN111065779A (zh) * 2017-08-25 2020-04-24 佩科控股公司 具有能量吸收层的电线杆

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NL1041270B1 (en) 2017-01-27
NL1041270A (en) 2016-10-14

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