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WO2007104993A1 - Dispositif d'ancrage - Google Patents

Dispositif d'ancrage Download PDF

Info

Publication number
WO2007104993A1
WO2007104993A1 PCT/GB2007/000910 GB2007000910W WO2007104993A1 WO 2007104993 A1 WO2007104993 A1 WO 2007104993A1 GB 2007000910 W GB2007000910 W GB 2007000910W WO 2007104993 A1 WO2007104993 A1 WO 2007104993A1
Authority
WO
WIPO (PCT)
Prior art keywords
anchoring device
solid body
concrete
anchoring
central passageway
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.)
Ceased
Application number
PCT/GB2007/000910
Other languages
English (en)
Inventor
Alec Trotter
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.)
K GUARD UK Ltd
Original Assignee
K GUARD UK Ltd
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 K GUARD UK Ltd filed Critical K GUARD UK Ltd
Priority to EP07712902A priority Critical patent/EP2004920A1/fr
Publication of WO2007104993A1 publication Critical patent/WO2007104993A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/38—Connections for building structures in general
    • E04B1/41—Connecting devices specially adapted for embedding in concrete or masonry
    • E04B1/4114—Elements with sockets
    • E04B1/4121—Elements with sockets with internal threads or non-adjustable captive nuts
    • 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
    • F16B37/00—Nuts or like thread-engaging members
    • F16B37/12—Nuts or like thread-engaging members with thread-engaging surfaces formed by inserted coil-springs, discs, or the like; Independent pieces of wound wire used as nuts; Threaded inserts for holes
    • F16B37/122—Threaded inserts, e.g. "rampa bolts"
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/38—Connections for building structures in general
    • E04B1/41—Connecting devices specially adapted for embedding in concrete or masonry
    • E04B2001/4192—Connecting devices specially adapted for embedding in concrete or masonry attached to concrete reinforcing elements, e.g. rods or wires

Definitions

  • This invention relates to an anchoring device for anchoring an object to a substrate such as a wall, ceiling or floor. More particularly, the invention provides an anchoring device for casting in a reinforced concrete surface to provide a means for anchoring an object to the reinforced concrete surface.
  • anchoring devices for use in reinforced concrete surfaces such as floors and ceilings, some of which are put in place before pouring of the concrete and some of which are installed after the concrete has cured.
  • Examples of the latter type are expanding bolts that are installed by drilling a hole in a concrete surface just large enough to accommodate the bolt and then hammering a plunger into the bolt to spread the lower part of the bolt so that it grips the wall of the hole.
  • This type of anchoring device suffers from a number of disadvantages. Firstly, the need to drill into the reinforced concrete means that there is a substantial risk that the drill bit may sever or at least weaken one of the tensioned reinforcing rods within the concrete.
  • An alternative anchoring device for reinforced concrete surfaces makes use of the reinforcing rods in the concrete to hold the anchoring device in place.
  • a device comprises a tubular metal body which is internally threaded at one end to receive a bolt or similar threaded fastening means and is flattened at the other end. The flattened end has a hole drilled or punched through it.
  • the anchoring device is secured to the reinforcing rods before the concrete is poured, either by threading a reinforcing rod through the hole in the flattened end of the device or by tying the device to a reinforcing rod by, for example, wire. Once the anchoring device(s) is in place, the concrete can then be poured.
  • this type of anchoring device also suffers from several problems. Firstly, the installation of the device can be time consuming and, secondly, the relative ease with the device can swivel about the reinforcing rod means that it is difficult to ensure that the threaded part of the device is perpendicular to the surface of the concrete. Consequently, when objects such as the posts for railings or barriers are connected to the anchor, they may not be correctly aligned.
  • an anchoring device that can be installed in a concrete substrate such as a floor or ceiling without damaging the concrete and which can be installed accurately, readily and easily so that a bolt or anchoring post, when connected to the anchoring device, is perpendicular to the surface.
  • the invention provides an anchoring device comprising a solid body having a wider end, a narrower end and a connecting side wall therebetween, the side wall being formed with a plurality of longitudinal ridges that decrease in radial dimension in the direction of the narrower end of the solid body; and the solid body being provided with a central passageway extending axially from the narrower end, the central passageway having a thread for receiving a threaded anchoring post or bolt.
  • the anchoring device of the invention is shaped so that it can be pushed into wet concrete before it cures, but after the initial screeding has taken place.
  • the shape of the anchoring device allows the wet concrete to flow around the body of the anchoring device as it is pushed in, thereby holding the device firmly in place.
  • the longitudinal ridges prevent retraction of the device from the concrete.
  • the solid body comprises a substantially circular cylindrical portion from which the longitudinal ridges extend. The circular cylindrical shape facilitates the flow of concrete around the solid body.
  • the solid body is typically formed from a plastics material such as polyamide (e.g. "Nylon") and may be formed, for example by injection moulding or by machining from plastics bar or rod.
  • the lightweight nature of the anchoring device ensures that sinking / displacement of the anchoring device cannot occur.
  • the central passageway may be formed during a moulding process or may be drilled out after moulding a basic body shape.
  • the plastics material may be reinforced with reinforcing fibres such as glass fibres for extra strength.
  • the central passageway opens at the narrower end of the solid body and extends axially away therefrom.
  • the central passageway can extend through the entire length of the solid body or for only part of the length of the body. In the latter case, which is preferred, the central passageway is a blind passage.
  • the central passageway contains a thread, either cut directly into the wall of the passageway, or provided by means of a threaded portion formed from another material such as metal and which is inserted or embedded (e.g. by moulding) in the central passageway.
  • the anchoring device is configured such that the thread is at least partially provided by a threaded metal sleeve which is disposed within the central passageway.
  • the threaded metal sleeve is typically embedded in a wall of the central passageway.
  • the threaded metal sleeve can extend along the entire length of the central passageway or along only a portion of the central passageway. In one embodiment, the threaded metal sleeve extends along only a portion of the central passageway.
  • the central passageway can be threaded to one or both sides of the metal sleeve.
  • the central passageway can be threaded either side of the metal sleeve, the metal sleeve being embedded so that the thread to either side of the metal sleeve is flush with the thread of the metal sleeve.
  • the metal sleeve being embedded so that the thread to either side of the metal sleeve is flush with the thread of the metal sleeve.
  • the ridges are equidistantly spaced round the side surface. Therefore, when there are four ridges, the centres of the ridges will be 90° apart.
  • the anchoring device of the invention may have a saddle formation at the wider end of the solid body, the saddle formation being configured so that in use it can sit about a reinforcing bar or rod in a reinforced concrete substrate.
  • the saddle portion typically has a channel formed in an undersurface thereof, the channel being of a size such that it can accommodate the reinforcing bar or rod in the concrete.
  • the saddle portion provides a means of locating the anchoring device more accurately in the concrete while it is curing and also assists in maintaining the correct distance to the surface of the concrete.
  • the anchoring device has a solid body which is of substantially frustoconical form having a wider end, a narrower end and a connecting side surface linking the wider and narrower ends; the side surface having a plurality of channels therein extending from the wider end towards the narrower end, the channels tapering in the direction of the narrower end; and wherein the longitudinal ridges are constituted by regions of the side surface between adjacent channels.
  • the channels are preferably of arcuate cross section.
  • the channels taper in the direction of the narrower end; i.e. the channels decrease either in width or in depth or in both width and depth towards the narrower end. Preferably the channels decrease in both width and depth towards the narrow end.
  • the maximum depth of the channel, at the wider end of the frustoconical solid body, is typically greater than one quarter of the radius of the wider end.
  • the floor of each channel, i.e. the deepest part of the channel, can be substantially parallel to the longitudinal axis of the frustoconical solid body. This arrangement further assists the flow of concrete around the frustoconical solid body as it is pushed into wet concrete.
  • the radial distance between the longitudinal axis of the frustoconical solid body and the deepest part of each channel at the wider end corresponds substantially to the radius of the narrower end of the solid body.
  • the solid body can be viewed as a cylinder upon which are superimposed radially extending ridges, the ridges corresponding to the regions of the body between the channels .
  • a removable cap is preferably provided for concealing the central passageway during installation of the anchoring device. The removable cap can be removed once the concrete has set.
  • the invention provides a concrete substrate having embedded therein an anchoring device as defined herein, wherein the solid body is buried within the concrete substrate so that only the narrower end of the solid body or, when present, the removable cap, are visible.
  • the concrete substrate may be a reinforced concrete substrate, e.g. formed from concrete reinforced with metal (e.g. steel) reinforcing rods.
  • the invention further provides a method of forming a concrete substrate having embedded therein one or more anchoring devices as defined herein, which method comprises pushing each anchoring device into the surface of the concrete substrate whilst it is still wet and before the concrete has set so that all or the greater part of each anchoring device is submerged below the surface of the concrete, and thereafter allowing the concrete to set.
  • the anchoring devices of the invention can be used for securing temporary safety barriers to concrete floors (e.g. elevated concrete floors) during the construction or renovation of buildings.
  • the safety barriers can be personnel security barriers of the type described in our earlier patent application GB2398100.
  • the invention provides a safety barrier assembly for a concrete floor, the safety barrier assembly comprising a plurality of anchoring devices as defined herein set into the concrete floor and one or more safety barriers secured to the floor by means of threaded anchoring posts or bolts connected to the anchoring devices.
  • Figure 1 is a side view of an anchoring device according to one embodiment of the invention.
  • Figure 2 is a view from direction I of the anchoring device in Figure 1.
  • Figure 3 is a view from direction II of the anchoring device of Figure 1.
  • Figure 4 is a sectional view along line III-III in Figure 2 but additionally showing a removable cap.
  • Figure 5 is a sectional view showing the anchoring device of Figures 1 to 4 anchored in a concrete surface.
  • Figure 6 is a schematic illustration showing a barrier anchored to a concrete surface by anchoring devices of the invention.
  • Figure 7 is a perspective view of an anchoring device according to a second embodiment of the invention.
  • Figure 8 is a view from one side of the anchoring device of Figure 7.
  • Figure 9 is a view from direction Dl of the embodiment of Figure 7.
  • Figure 10 is view from direction D2 of the embodiment of Figure 9.
  • Figure 11 is a view from direction D3 of the embodiment of Figure 9.
  • Figure 12 is a section along line A - A of Figure 10.
  • Figure 13 is an isometric view of a section as shown in Figure 12.
  • an anchoring device comprises a substantially frustoconical solid body 2 having a wider end 4, a narrower end 6 and a side surface 8 linking the wider 4 and narrower 6 ends.
  • the side surface 8 has a plurality (in this case four) of channels 10 therein that extend from the wider end 4 to the narrower end 6.
  • the channels 10 are of arcuate cross section and taper in the direction of the narrower end 6, with both the depth and the width of the channels decreasing with distance towards the narrower end 6.
  • the deepest part of the channel 10 at the wider end 4 is denoted by the letter D and it can be seen from Figures 2 and 3 that the radial distance r 1 between D and the central axis of the solid body 2 is equal to the radius r 2 of the solid body 2 at the narrower end.
  • the floor 12 of each channel is substantially parallel to the central axis A of the solid body 2.
  • the solid body may be viewed as a circular cylinder upon which are superimposed a series of radially extending ridges 14, the ridges being constituted by the regions of the solid body between the channels.10.
  • the solid body 2 is provided with a central passageway 16 which has an internal thread 18 for receiving a threaded anchoring socket, post or bolt.
  • the central passageway 16 is a blind passageway that extends for about three fifths of the length of the solid body.
  • the passageway can either be formed during the moulding of the solid body or formed by drilling after the body has been moulded.
  • the thread is typically cut in a separate operation after the solid body has been formed by moulding.
  • the thread 18 in the embodiment shown in Figure 4 is cut directly into the plastics material of the solid body 2. However, as an alternative, a threaded metal insert can be set into the passageway 16.
  • the threaded metal insert may have an internal thread for receiving an anchoring socket, post or bolt and an external self tapping thread for cutting into the wall of the passageway 16 to secure the insert in place.
  • the threaded metal insert enables the anchoring device to withstand greater pull-out loads than might be the case where the thread is cut directly into the solid body.
  • a removable cap 20 is fitted to the solid body 2 by means of threaded spigot 22 and the anchoring device is pushed into a layer of wet uncured concrete C reinforced with reinforcing rods R.
  • the anchoring device is pushed into the concrete, the concrete flows or slides into and along the channels 10 so that, when it has been fully pushed into the concrete, only the cap 20 is visible.
  • the smooth arcuate profile of the channels 10 and the fact that the floors of the channels are substantially parallel with the longitudinal axis A of the solid body 2 together ensure that the concrete slides smoothly over the surface of the solid body 2 with only minimal disturbance to the surrounding areas of concrete.
  • FIG. 6 shows schematically the securing of a barrier B to a concrete floor F by means of a pair of threaded posts connected to a pair of anchoring devices 1 of the invention.
  • the anchoring device comprises a solid body 102, which has a substantially circular cylindrical portion 104 from which extend longitudinal ridges 106, 108.
  • the longitudinal ridges decrease in radial dimension in the direction of the narrower end 110 of the solid body.
  • a saddle formation 114 which has a channel 116 moulded into the under surface thereof.
  • a total of four longitudinal ridges are provided, two shorter ridges 108 extending between the narrow end and an upper surface of the saddle formation 114, and a pair of longer ridges 106 that extend from the narrower end 110 to a flange 118 at the wider end 112 of the solid body.
  • the longitudinal ridges in this embodiment are much narrower than those of embodiment 1, and take the form of fins that are of substantially uniform thickness along their length.
  • the outer edges 120, 122 of the longitudinal ridges can be radiused or substantially flat.
  • the solid body 102 has a central passageway 122, which is threaded along its entire length.
  • a central passageway 122 Set into the wall 124 of the central passageway 122 is an embedded metal sleeve 126 which itself is threaded on its inner and outer surfaces. The thread on the inner surface of the metal sleeve 126 is aligned with the thread extending along the remainder of the central passageway 122.
  • the anchoring device shown in Figures 7 to 13 is formed from a moulded plastics material, and in particular a moulded polyamide such as 'nylon'.
  • the generally circular cylindrical shape of the upper part of the solid body facilitates the flow of concrete around the anchoring device as it is pushed into the concrete.
  • the anchoring device can be rotated so that the channel 116 of the saddle formation 114 sits about the ring forcing rod or bar. Locating the anchoring device on a reinforcing rod or bar allows more accurate positioning of the anchoring device and this, together with the lightweight nature of the materials from which the anchoring device is formed serve to prevent the anchoring device from sinking too far into the concrete before it cures.
  • a removable cap can be provided for closing the central passageway during installation, thereby to prevent fouling of the thread. Once the concrete has cured, the cap can be removed.
  • the embodiments illustrated in Figures 1 to 13 represent merely two ways of putting the invention into effect and it will readily be apparent that numerous modifications and alterations may be made to the specific embodiments shown without departing from the principles underlying the invention. All such modifications and alterations are intended to be embraced by this application.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Joining Of Building Structures In Genera (AREA)

Abstract

L'invention concerne un dispositif d'ancrage comportant un corps plein (102) ayant une extrémité plus large (112), une extrémité plus étroite (110) et une paroi latérale de connexion entre celles-ci, la paroi latérale étant formée avec une pluralité de nervures longitudinales (106, 108) qui diminuent en dimension radiale dans la direction de l'extrémité plus étroite du corps plein ; et le corps plein étant mis en œuvre avec une voie de passage centrale (122) s'étendant axialement en provenance de l'extrémité plus étroite, la voie de passage centrale (122) ayant un filet pour recevoir un montant ou boulon d'ancrage fileté.
PCT/GB2007/000910 2006-03-15 2007-03-14 Dispositif d'ancrage Ceased WO2007104993A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP07712902A EP2004920A1 (fr) 2006-03-15 2007-03-14 Dispositif d'ancrage

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0605218A GB2436133B (en) 2006-03-15 2006-03-15 Anchoring device
GB0605218.7 2006-03-15

Publications (1)

Publication Number Publication Date
WO2007104993A1 true WO2007104993A1 (fr) 2007-09-20

Family

ID=36292803

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2007/000910 Ceased WO2007104993A1 (fr) 2006-03-15 2007-03-14 Dispositif d'ancrage

Country Status (3)

Country Link
EP (1) EP2004920A1 (fr)
GB (1) GB2436133B (fr)
WO (1) WO2007104993A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2591747B (en) * 2020-02-04 2022-03-02 Ischebeck Titan Ltd Anchor assembly

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3982363A (en) * 1974-10-18 1976-09-28 Ddk Investments, Ltd. Frangible insert
FR2464343A1 (fr) * 1979-08-29 1981-03-06 Costamagna & Cie B M Procede et dispositif pour la mise en place de plancher sous des poutrelles
GB2398100A (en) * 2003-02-08 2004-08-11 Guard Uk Ltd K Personnel security barrier system

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH500388A (de) * 1967-04-05 1970-12-15 Aackersberg Mortensen Dübel zum Einbetonieren
JP3810001B2 (ja) * 2001-02-06 2006-08-16 株式会社青山製作所 インサート部品

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3982363A (en) * 1974-10-18 1976-09-28 Ddk Investments, Ltd. Frangible insert
FR2464343A1 (fr) * 1979-08-29 1981-03-06 Costamagna & Cie B M Procede et dispositif pour la mise en place de plancher sous des poutrelles
GB2398100A (en) * 2003-02-08 2004-08-11 Guard Uk Ltd K Personnel security barrier system

Also Published As

Publication number Publication date
GB0605218D0 (en) 2006-04-26
GB2436133A (en) 2007-09-19
GB2436133B (en) 2008-08-27
EP2004920A1 (fr) 2008-12-24

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