US20140000180A1 - Yielding Post of Thin Sheet Metal and Method of Arranging Street Lighting - Google Patents

Yielding Post of Thin Sheet Metal and Method of Arranging Street Lighting Download PDF

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Publication number
US20140000180A1
US20140000180A1 US14/006,365 US201214006365A US2014000180A1 US 20140000180 A1 US20140000180 A1 US 20140000180A1 US 201214006365 A US201214006365 A US 201214006365A US 2014000180 A1 US2014000180 A1 US 2014000180A1
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United States
Prior art keywords
post
sheet metal
weld
traffic
joint
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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.)
Abandoned
Application number
US14/006,365
Inventor
Fredrik Moberg
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Northcone AB
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Northcone AB
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Publication date
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Assigned to NORTHCONE AB reassignment NORTHCONE AB ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: MOBERG, Fredrik
Publication of US20140000180A1 publication Critical patent/US20140000180A1/en
Abandoned legal-status Critical Current

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    • E01F9/0182—
    • 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 invention relates to yielding posts of sheet metal that have a round or polygonal cross-section and one or more longitudinal welded joints.
  • the invention also relates to a method of arranging street lighting with yielding posts.
  • Lamp posts along roads shall now be yielding and decelerate a colliding vehicle over a fairly long distance. This is achieved if the posts bend backwards over the vehicle, so that the entire post is deformed when the vehicle continues forwards.
  • Conical posts are known from WO 2008/127168 that are roll-formed and have a welded longitudinal joint. Such roll-formed posts can be produced from such a small sheet metal thickness that they bend on collision in spite of being very sturdy against wind forces. Tall posts have such a large diameter at the bottom, however, that they can offer undesirably great resistance before they bend.
  • An object of the invention is to ensure that the post bends backwards when run into. Another object is to make the production of the post simpler and faster and more reliable.
  • posts are used that have a longitudinal welded butt joint with a weld that is thinner than the sheet metal thickness and the posts are positioned so that this joint is directed towards the traffic.
  • the invention is defined by
  • FIG. 1 shows the cross-section of a lamp post as an example of the invention.
  • FIG. 2 shows the circled part of FIG. 1 enlarged.
  • FIG. 3 shows another example of the invention in cross section.
  • FIG. 1 shows a lamp post composed of several tapering metal sheets 11 - 14 , which means that the post tapers conically upwards.
  • the sheets can be flat, but can also have longitudinal folds 15 , 16 .
  • the sheets are joined together by longitudinal welded joints 17 - 20 .
  • FIG. 2 shows the joint 17 enlarged.
  • the edges of the opposing sheets 11 , 12 have bevels 21 , 22 , so that the contact surfaces of the edges are smaller than the sheet metal thickness and are welded together, preferably by laser welding, so that the thickness of the butt welds 23 across the sheet is smaller than the sheet metal thickness.
  • the welds do not cover the whole sheet metal thickness. They should cover at most 3 ⁇ 4 of the sheet metal thickness, i.e.
  • FIG. 3 shows a post that is roll formed from one piece so that it has only one longitudinal joint 24 that is executed in the manner described with reference to FIG. 2 .
  • the post has been roll formed in thin sheet metal with a sheet metal thickness of 1-2 mm, e.g. 1.5 mm, and it has a number of areas 25 with stiffening folds with threefold sheet metal in the manner described in WO 2008/127168, to which reference is made.
  • the stiffened areas 25 are strong against wind forces but allow the post to be flattened in the event of crash loading. If the post has a polygonal cross-section, the stiffenings 25 can expediently be formed as corners as shown, but the post can alternatively have a circular cross-section.
  • the corners stiffened against wind forces are deformed more easily in the event of crash loading than the other corners in the polygonal cross-section and the joint 24 can expediently be executed in one of the corners stiffened against wind forces.
  • Lamp posts according to FIG. 3 should be placed along the road so that the joint 24 is directed towards the traffic.
  • Posts according to FIG. 1 have so many joints that they do not necessarily need to be positioned with a joint directly facing the traffic. There are always one or two of the joints that are directed towards the traffic, regardless of the rotary position of the posts in relation to the traffic.
  • a roll-formed post according to FIG. 3 can also be roll formed in several parts and like the example in FIG. 1 have several longitudinal welds.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Road Signs Or Road Markings (AREA)

Abstract

Street lighting is positioned with lamp posts of sheet metal that have a round or polygonal cross-section and one or more longitudinal welded joints (17-20; 24). Posts are used that have one longitudinal welded butt joint with a weld that covers only a part of the sheet metal thickness and the posts are positioned so that this joint is directed towards the traffic.

Description

    TECHNICAL FIELD
  • The invention relates to yielding posts of sheet metal that have a round or polygonal cross-section and one or more longitudinal welded joints. The invention also relates to a method of arranging street lighting with yielding posts.
    • BACKGROUND OF THE INVENTION
  • Lamp posts along roads shall now be yielding and decelerate a colliding vehicle over a fairly long distance. This is achieved if the posts bend backwards over the vehicle, so that the entire post is deformed when the vehicle continues forwards. Conical posts are known from WO 2008/127168 that are roll-formed and have a welded longitudinal joint. Such roll-formed posts can be produced from such a small sheet metal thickness that they bend on collision in spite of being very sturdy against wind forces. Tall posts have such a large diameter at the bottom, however, that they can offer undesirably great resistance before they bend.
    • OBJECT OF THE INVENTION
  • An object of the invention is to ensure that the post bends backwards when run into. Another object is to make the production of the post simpler and faster and more reliable.
    • BRIEF DESCRIPTION OF THE INVENTION
  • According to the invention, posts are used that have a longitudinal welded butt joint with a weld that is thinner than the sheet metal thickness and the posts are positioned so that this joint is directed towards the traffic. The invention is defined by
    • BRIEF DESCRIPTION OF THE DRAWINGS
  • FIG. 1 shows the cross-section of a lamp post as an example of the invention.
  • FIG. 2 shows the circled part of FIG. 1 enlarged.
  • FIG. 3 shows another example of the invention in cross section.
    •  DESCRIPTION OF THE EXAMPLE SHOWN OF THE INVENTION
  • FIG. 1 shows a lamp post composed of several tapering metal sheets 11-14, which means that the post tapers conically upwards. The sheets can be flat, but can also have longitudinal folds 15,16. The sheets are joined together by longitudinal welded joints 17-20. FIG. 2 shows the joint 17 enlarged. The edges of the opposing sheets 11,12 have bevels 21,22, so that the contact surfaces of the edges are smaller than the sheet metal thickness and are welded together, preferably by laser welding, so that the thickness of the butt welds 23 across the sheet is smaller than the sheet metal thickness. Thus the welds do not cover the whole sheet metal thickness. They should cover at most ¾ of the sheet metal thickness, i.e. have a thickness t1 less than ¾ of the sheet metal thickness t2 and they thereby form weaknesses that give way easily if they are run into directly and allow the post to be flattened out and bend in the desired manner, but the welds are sufficiently strong not to constitute weaknesses in relation to wind forces. By making a weld that does not cover the sheet metal thickness, the welding can be carried out faster and still be more reliable. The current can be reduced and altogether, the production will be faster at a reduced cost.
  • FIG. 3 shows a post that is roll formed from one piece so that it has only one longitudinal joint 24 that is executed in the manner described with reference to FIG. 2. The post has been roll formed in thin sheet metal with a sheet metal thickness of 1-2 mm, e.g. 1.5 mm, and it has a number of areas 25 with stiffening folds with threefold sheet metal in the manner described in WO 2008/127168, to which reference is made. The stiffened areas 25 are strong against wind forces but allow the post to be flattened in the event of crash loading. If the post has a polygonal cross-section, the stiffenings 25 can expediently be formed as corners as shown, but the post can alternatively have a circular cross-section.
  • The corners stiffened against wind forces are deformed more easily in the event of crash loading than the other corners in the polygonal cross-section and the joint 24 can expediently be executed in one of the corners stiffened against wind forces. Lamp posts according to FIG. 3 should be placed along the road so that the joint 24 is directed towards the traffic.
  • Posts according to FIG. 1 have so many joints that they do not necessarily need to be positioned with a joint directly facing the traffic. There are always one or two of the joints that are directed towards the traffic, regardless of the rotary position of the posts in relation to the traffic. A roll-formed post according to FIG. 3 can also be roll formed in several parts and like the example in FIG. 1 have several longitudinal welds.

Claims (20)

1. Yielding post of thin sheet metal with a polygonal or round cross-section with at least one longitudinal welded butt joint (17-20,24), wherein the weld (23) has a smaller thickness across the sheet metal than the sheet metal thickness.
2. Post according to claim 1, wherein the weld (23) has a thickness of less than ¾ of the sheet metal thickness.
3. Post according to claim 1, wherein the edges (21,22) facing the weld are bevelled.
4. Post according to claim 1, wherein the weld (23) is a laser weld.
5. Post according to claim 1, wherein it is a lighting post by the road and has a longitudinal welded joint (17-20, 24) directed towards the traffic.
6. Post according to claim 5, wherein the lighting post is roll formed and has only one longitudinal joint (24).
7. Method of arranging street lighting with lamp posts of sheet metal that have a round or polygonal cross-section and one or more longitudinal welded joints (17-20; 24), wherein posts are used that have one longitudinal welded butt joint (17-20; 24) with a weld (23) that has a smaller thickness across the sheet metal than the sheet metal thickness and the posts are positioned so that this joint is directed towards the traffic.
8. Method according to claim 7, wherein posts are used with a laser welded joint with a weld thickness of less than ¾ of the sheet metal thickness.
9. Method according to claim 8, wherein posts are used that are roll formed in one piece so that they have only one longitudinal joint (24).
10. Post according to claim 2, wherein the edges (21,22) facing the weld are bevelled.
11. Post according to claim 10, wherein the weld (23) is a laser weld.
12. Post according to claim 3, wherein the weld (23) is a laser weld.
13. Post according to claim 2, wherein the weld (23) is a laser weld.
14. Post according to claim 13, wherein it is a lighting post by the road and has a longitudinal welded joint (17-20, 24) directed towards the traffic.
15. Post according to claim 12, wherein it is a lighting post by the road and has a longitudinal welded joint (17-20, 24) directed towards the traffic.
16. Post according to claim 11, wherein it is a lighting post by the road and has a longitudinal welded joint (17-20, 24) directed towards the traffic.
17. Post according to claim 10, wherein it is a lighting post by the road and has a longitudinal welded joint (17-20, 24) directed towards the traffic.
18. Post according to claim 4, wherein it is a lighting post by the road and has a longitudinal welded joint (17-20, 24) directed towards the traffic.
19. Post according to claim 3, wherein it is a lighting post by the road and has a longitudinal welded joint (17-20, 24) directed towards the traffic.
20. Post according to claim 2, wherein it is a lighting post by the road and has a longitudinal welded joint (17-20, 24) directed towards the traffic.
US14/006,365 2011-03-23 2012-03-22 Yielding Post of Thin Sheet Metal and Method of Arranging Street Lighting Abandoned US20140000180A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
SE1100211-0 2011-03-23
SE1100211A SE535989C2 (en) 2011-03-23 2011-03-23 Compliant post and way of arranging road lighting
PCT/SE2012/000041 WO2012128693A1 (en) 2011-03-23 2012-03-22 Yielding post of thin sheet metal and method of arranging street lighting

Publications (1)

Publication Number Publication Date
US20140000180A1 true US20140000180A1 (en) 2014-01-02

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US14/006,365 Abandoned US20140000180A1 (en) 2011-03-23 2012-03-22 Yielding Post of Thin Sheet Metal and Method of Arranging Street Lighting

Country Status (8)

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US (1) US20140000180A1 (en)
EP (1) EP2689070B9 (en)
DK (1) DK2689070T3 (en)
ES (1) ES2610757T3 (en)
PL (1) PL2689070T3 (en)
PT (1) PT2689070T (en)
SE (1) SE535989C2 (en)
WO (1) WO2012128693A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
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WO2017167990A1 (en) * 2016-04-01 2017-10-05 Innogy Se Support structure for a wind turbine

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Publication number Priority date Publication date Assignee Title
GB201212888D0 (en) * 2012-07-19 2012-09-05 Signpost Solutions Ltd Support assembly
DE102019101330A1 (en) * 2019-01-18 2020-07-23 Innogy Se Support structure for a wind turbine

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US3936206A (en) * 1975-02-18 1976-02-03 Bruce-Lake Company Tubular pole slip joint construction
US4724975A (en) * 1986-06-18 1988-02-16 Cbi Research Corporation High-pressure structure made of rings with peripheral weldments of reduced thickness
US20040247376A1 (en) * 2001-09-28 2004-12-09 Malo Kjell Arne Connector for carrying raodside posts
US20050252160A1 (en) * 2004-05-12 2005-11-17 Jerry Miller Method of forming joints of non-cylindrical tubing
US20080250752A1 (en) * 2007-04-12 2008-10-16 Hapco Aluminum Pole Products Embeddable breakaway utility pole
US20090021019A1 (en) * 2007-06-20 2009-01-22 Siemens Aktiengesellschaft Wind turbine tower and method for constructing a wind turbine tower
US20100058673A1 (en) * 2007-08-31 2010-03-11 Mitsubishi Heavy Industries Ltd Tubular-member flange coupling

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GB396745A (en) 1932-02-03 1933-08-03 Aubrey Frederic Burstall Improvements in and relating to hollow metal structures such as masts, poles, and crane jibs
US3217459A (en) * 1962-09-17 1965-11-16 Roy E Meyer Tower structure
SE446640B (en) * 1983-04-08 1986-09-29 Lars Svensson POST consisting of a weakened metal bearing profile made of metal
DE9202757U1 (en) * 1992-03-02 1992-10-29 König, Reinhard, Dr.-Ing., 7505 Ettlingen mast
SE531195C2 (en) 2007-04-13 2009-01-13 Ortic 3D Ab Resilient post and way to manufacture such
BE1017649A7 (en) * 2007-06-15 2009-03-03 Safety Product Nv ROAD SAFE POLE.
AU2008229948B2 (en) * 2008-10-15 2016-08-11 Plasgain Pty Ltd An Impact Absorbing Pole

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3936206A (en) * 1975-02-18 1976-02-03 Bruce-Lake Company Tubular pole slip joint construction
US4724975A (en) * 1986-06-18 1988-02-16 Cbi Research Corporation High-pressure structure made of rings with peripheral weldments of reduced thickness
US20040247376A1 (en) * 2001-09-28 2004-12-09 Malo Kjell Arne Connector for carrying raodside posts
US20050252160A1 (en) * 2004-05-12 2005-11-17 Jerry Miller Method of forming joints of non-cylindrical tubing
US20080250752A1 (en) * 2007-04-12 2008-10-16 Hapco Aluminum Pole Products Embeddable breakaway utility pole
US20100281786A1 (en) * 2007-04-12 2010-11-11 Kearney-National Inc. Embeddable breakaway utility pole
US20090021019A1 (en) * 2007-06-20 2009-01-22 Siemens Aktiengesellschaft Wind turbine tower and method for constructing a wind turbine tower
US20100058673A1 (en) * 2007-08-31 2010-03-11 Mitsubishi Heavy Industries Ltd Tubular-member flange coupling

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017167990A1 (en) * 2016-04-01 2017-10-05 Innogy Se Support structure for a wind turbine
KR20180130540A (en) * 2016-04-01 2018-12-07 이노지 에스이 Support structure for wind turbines
JP2019512628A (en) * 2016-04-01 2019-05-16 イノジー ソシエタス ヨーロピアｉｎｎｏｇｙ ＳＥ Support structure used for wind turbines
KR102208284B1 (en) * 2016-04-01 2021-01-26 이노지 에스이 Support structure for wind turbine
US11053703B2 (en) 2016-04-01 2021-07-06 Innogy Se Support structure for a wind turbine

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DK2689070T3 (en) 2017-01-30
EP2689070B9 (en) 2017-08-16
PT2689070T (en) 2017-01-04
WO2012128693A1 (en) 2012-09-27
PL2689070T3 (en) 2017-06-30
EP2689070A1 (en) 2014-01-29
SE535989C2 (en) 2013-03-19
ES2610757T3 (en) 2017-05-03
SE1100211A1 (en) 2012-09-24
EP2689070B1 (en) 2016-10-12
EP2689070A4 (en) 2014-11-12

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AS Assignment

Owner name: NORTHCONE AB, SWEDEN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:MOBERG, FREDRIK;REEL/FRAME:031248/0188

Effective date: 20130813

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION