EP2279311A1 - Ancrage support - Google Patents

Ancrage support

Info

Publication number
EP2279311A1
EP2279311A1 EP09728567A EP09728567A EP2279311A1 EP 2279311 A1 EP2279311 A1 EP 2279311A1 EP 09728567 A EP09728567 A EP 09728567A EP 09728567 A EP09728567 A EP 09728567A EP 2279311 A1 EP2279311 A1 EP 2279311A1
Authority
EP
European Patent Office
Prior art keywords
pivot
retaining member
shaft
slot
support anchor
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.)
Withdrawn
Application number
EP09728567A
Other languages
German (de)
English (en)
Inventor
Wayne Poultney
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.)
Balfour Beatty PLC
Original Assignee
Balfour Beatty PLC
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Balfour Beatty PLC filed Critical Balfour Beatty PLC
Publication of EP2279311A1 publication Critical patent/EP2279311A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
    • E04G21/32—Safety or protective measures for persons during the construction of buildings
    • E04G21/3261—Safety-nets; Safety mattresses; Arrangements on buildings for connecting safety-lines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B13/00—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose
    • F16B13/04—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front
    • F16B13/08—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front with separate or non-separate gripping parts moved into their final position in relation to the body of the device without further manual operation
    • F16B13/0808—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front with separate or non-separate gripping parts moved into their final position in relation to the body of the device without further manual operation by a toggle-mechanism
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
    • A62B1/00—Devices for lowering persons from buildings or the like
    • A62B1/02—Devices for lowering persons from buildings or the like by making use of rescue cages, bags, or the like
    • A62B1/04—Single parts, e.g. fastening devices
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
    • A62B35/00—Safety belts or body harnesses; Similar equipment for limiting displacement of the human body, especially in case of sudden changes of motion
    • A62B35/0043—Lifelines, lanyards, and anchors therefore
    • A62B35/0068—Anchors
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
    • E04G21/32—Safety or protective measures for persons during the construction of buildings
    • E04G21/3261—Safety-nets; Safety mattresses; Arrangements on buildings for connecting safety-lines
    • E04G21/3276—Arrangements on buildings for connecting safety-lines

Definitions

  • Electricity transmission towers are commonly constructed from a lattice of metal beams.
  • climbing step bolts are typically provided at regular intervals on the legs of the tower. These are generally affixed in drilled holes in the metal beam forming the leg.
  • measures are usually taken to prevent or deter unauthorized persons from climbing the tower.
  • One such measure is not to fit the step bolts along the full height of the tower.
  • a further anti-climb device may be fitted at the top of the initial interval.
  • an authorized person In order to climb the tower, an authorized person must fit the missing step bolts into the holes at the base of the tower leg. It is common for up to ten step bolts to be needed, each of which must be secured with nuts on a threaded section of the bolt at the reverse side of the hole. Fitting this number of nuts and bolts is a time consuming and awkward task. Needless to say, when work is finished, the same number of bolts must once again be removed.
  • a support anchor for temporary attachment to a substantially vertical structure, the structure having a hole
  • the anchor comprising: a shaft, comprising a first end portion suitable for insertion through the hole, and restricting means disposed along the shaft at a predetermined distance from the first end, the distance being greater than a thickness of the structure, and the restricting means adapted to restrict insertion beyond that distance; and an elongate retaining member, movably connected to the first end of the shaft, having a first released configuration in which it may be threaded through the hole and a second locked configuration in which it may not; wherein the elongate retaining member comprises a slot and the first end of the shaft comprises a pivot, the pivot connected to the slot such that the elongate member is operable to slide over the pivot and, in at least the released configuration, to be freely rotatable about it.
  • This support anchor is suitable for use as a transmission tower step bolt and removes the need for multiple parts (nuts and bolts) by providing an anchor with integral means of attachment.
  • the retaining member can be inserted through the hole in the tower leg and clipped securely into place. The possibility of dropping the nut while trying to fit it is thus removed.
  • the clamping in place of the bolt is easy and quick, and just as easily reversible when it is desired to remove the bolt. Indeed, a skilled user may be able to fit and detach the bolt single-handedly.
  • the retaining member is freely rotatable about the pivot in the first released configuration and not freely rotatable about the pivot in the second locked configuration.
  • the pivot end of the shaft and the slot or groove in the retaining member are arranged such that rotation is impossible when the device is clamped in place.
  • the retaining member is freely rotatable, assisting the easy threading of the member and end of the shaft through the hole. This provides simple but effective operation of the device.
  • the pivot may be positioned at a first end of the slot, corresponding to a first end of the retaining member.
  • the first end of the retaining member extends below the pivot.
  • This arrangement of the retaining member allows gravity to contribute to the secure attachment of the device in the locked position.
  • the retaining member In order to release the anchor, the retaining member must be slid upwards (against gravity) until a release is achieved.
  • a portion of the retaining member is suitably positioned to brace the anchor firmly against the structure.
  • Figure 1 shows an example of a support anchor according to the invention being threaded through a hole in a suitable structure, in an unlocked configuration
  • Figure 2 shows the anchor of Fig. 1 with the shaft in place but still in its unlocked configuration
  • Figure 3 shows the same example anchor as the retaining member is being moved into its locked configuration
  • FIG. 4 shows the same example in the locked configuration. Note that the drawings are illustrative and not necessarily to scale. Like elements are given like reference numerals throughout.
  • the support anchor of the current invention fulfils these needs. However, its application is not limited to the field of electricity transmission towers. It may be useful in a variety of circumstances where a temporary load- bearing fitting is required on a substantially vertical structure, provided that a suitable hole is available. The other prerequisite is that both sides of the structure providing the hole are accessible, so that the retaining member can be latched and unlatched manually.
  • the step bolt is formed of two movably connected rigid parts.
  • the first part is the main shaft 10, which on its load-bearing side may be no different from the shaft of a traditional step bolt.
  • a front plate 30 At a point along the shaft close to the insertion-end, there is a front plate 30. This is wider than the aperture of the hole for which the bolt is intended and prevents the bolt from being inserted through the hole further than the end portion 20 of the shaft.
  • a pivot 60 At the end of the shaft is a pivot 60, which sits in a slot or groove 50 in the retaining member 40, connecting the two.
  • the slot may extend for part of the length of the retaining member, as shown in Fig. 1.
  • the hanging retaining member is then rotated on the pivot 60, raising it into the upright position. In this position, it becomes possible to slide the pivot 60 in the slot 50, simultaneously lowering and rotating the retaining member, as shown in Fig. 3. Once the pivot has travelled away from the end of the slot, it is no longer possible to freely rotate the retaining member. Rather, rotation is guided by the construction of the slot 50, pivot 60 and/or shaft-end 20.
  • a step bolt of the type described in this embodiment may be suitable for electricity transmission towers having leg thicknesses ranging from 10mm to 28mm.
  • the temporary step bolt can be used as a climbing aid, like a rung of a ladder. It may also be suitable for attachment of safety devices, such as a safety climbing lanyard. In this case, the bolt should be capable of withstanding the load incurred should a person fall while attached to it.
  • a step bolt of the type described in this embodiment may be suitable for electricity transmission towers with legs having holes ranging from 17mm to 21 mm in diameter. To remove the temporary step bolt, the attachment process described above is simply reversed. The retaining member 40 is slid upwards and allowed to fall into a hanging position. The end of the shaft and the retaining member can then be threaded or pulled through the hole to withdraw.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Emergency Lowering Means (AREA)
  • Ladders (AREA)

Abstract

L'invention concerne un ancrage support pour fixation provisoire à une structure sensiblement verticale, la structure étant munie d'un trou et l'ancrage comportant : un axe (10) muni d'une première partie d'extrémité (20) conçue pour pouvoir être insérée dans le trou, et un moyen de limitation (30) disposé le long de l'axe (10) à une distance prédéterminée de la première extrémité, la distance étant supérieure à une épaisseur de la structure et le moyen de limitation étant conçu pour empêcher toute insertion au-delà de cette distance ; et un organe de retenue allongé (40), relié de façon amovible à la première extrémité de l'axe, comportant une première configuration déverrouillée dans laquelle il peut être enfilé dans le trou et une seconde configuration verrouillée dans laquelle cette action n'est pas possible ; l'organe de retenue allongé (40) comportant une encoche (50) et la première extrémité (20) de l'axe comportant un axe de pivotement (60), celui-ci étant associé à l'encoche de façon à ce que l'organe allongé puisse coulisser sur l'axe de pivotement et, au moins dans la configuration déverrouillée, puisse tourner librement autour de celui-ci.
EP09728567A 2008-03-31 2009-03-30 Ancrage support Withdrawn EP2279311A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0805777A GB2458890B (en) 2008-03-31 2008-03-31 Support anchor
PCT/GB2009/050308 WO2009122204A1 (fr) 2008-03-31 2009-03-30 Ancrage support

Publications (1)

Publication Number Publication Date
EP2279311A1 true EP2279311A1 (fr) 2011-02-02

Family

ID=39387011

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09728567A Withdrawn EP2279311A1 (fr) 2008-03-31 2009-03-30 Ancrage support

Country Status (5)

Country Link
EP (1) EP2279311A1 (fr)
AU (1) AU2009233525A1 (fr)
GB (1) GB2458890B (fr)
NZ (1) NZ588630A (fr)
WO (1) WO2009122204A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT514698B1 (de) * 2013-11-04 2015-03-15 Innotech Arbeitsschutz Gmbh Anschlagvorrichtung für eine Absturzsicherung

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1963514A (en) * 1933-05-15 1934-06-19 Guy P Wherren Form tie clamp
US3673910A (en) * 1968-09-09 1972-07-04 Frank C Collister Key bolt
FR2715684A1 (fr) * 1994-02-01 1995-08-04 Orlando Sauveur Serre joint coulissant à tête pivotante, multiples fonctions, pratique pour accès innaccessible.
JP2007126829A (ja) * 2005-11-01 2007-05-24 Takashi Hashiguchi 足場支持具

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB190928232A (en) * 1909-12-03 1910-03-31 John Thomas Hull An Improved Device for Securing Bolts to Traction Engine and the like Heavy Road Vehicle Wheels.
US3399746A (en) * 1966-11-28 1968-09-03 Universal Pole Bracket Corp Removable structure climbing device
US3861267A (en) * 1968-09-09 1975-01-21 Frank C Collister Key bolt
US4196883A (en) * 1977-12-22 1980-04-08 Coats & Clark, Inc. Hollow wall fastener
US5544717A (en) * 1994-07-06 1996-08-13 Duke Power Company Combination step bolt and harness attachment
US5507611A (en) * 1995-01-24 1996-04-16 Collister; Frank C. Key bolt fastener
US5941485A (en) * 1997-08-01 1999-08-24 Shakespeare Company Assembly for mounting a removable step to a hollow utility pole
CA2372789A1 (fr) 1999-05-05 2000-11-16 Bruce Raymond Mackinnon Ferrure
DE102006052664A1 (de) * 2006-11-07 2008-05-08 Ulrich Louis Vorrichtung zum Befestigen von Tragkonstruktionen an Gebäudewänden

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1963514A (en) * 1933-05-15 1934-06-19 Guy P Wherren Form tie clamp
US3673910A (en) * 1968-09-09 1972-07-04 Frank C Collister Key bolt
FR2715684A1 (fr) * 1994-02-01 1995-08-04 Orlando Sauveur Serre joint coulissant à tête pivotante, multiples fonctions, pratique pour accès innaccessible.
JP2007126829A (ja) * 2005-11-01 2007-05-24 Takashi Hashiguchi 足場支持具

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO2009122204A1 *

Also Published As

Publication number Publication date
WO2009122204A1 (fr) 2009-10-08
GB0805777D0 (en) 2008-04-30
AU2009233525A1 (en) 2009-10-08
GB2458890B (en) 2011-10-19
GB2458890A (en) 2009-10-07
NZ588630A (en) 2012-03-30

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