EP0116476A2 - Dispositif de fixation - Google Patents

Dispositif de fixation Download PDF

Info

Publication number
EP0116476A2
EP0116476A2 EP84300904A EP84300904A EP0116476A2 EP 0116476 A2 EP0116476 A2 EP 0116476A2 EP 84300904 A EP84300904 A EP 84300904A EP 84300904 A EP84300904 A EP 84300904A EP 0116476 A2 EP0116476 A2 EP 0116476A2
Authority
EP
European Patent Office
Prior art keywords
shuttering
channelling
bolt
lever
shank
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Withdrawn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
EP84300904A
Other languages
German (de)
English (en)
Other versions
EP0116476A3 (fr
Inventor
Peter Delhees
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
BICC 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 BICC PLC filed Critical BICC PLC
Publication of EP0116476A2 publication Critical patent/EP0116476A2/fr
Publication of EP0116476A3 publication Critical patent/EP0116476A3/fr
Withdrawn legal-status Critical Current

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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
    • E04G15/00—Forms or shutterings for making openings, cavities, slits, or channels
    • E04G15/06—Forms or shutterings for making openings, cavities, slits, or channels for cavities or channels in walls of floors, e.g. for making chimneys
    • E04G15/061—Non-reusable forms

Definitions

  • This invention relates to a device for securing concrete insert channelling to shuttering prior to pouring concrete into the shuttering.
  • concrete insert channelling is meant a structural member comprising a base and two walls, the walls being attached to and extending away in the same direction from the base, the free longitudinally extending edges of the walls having inturned flanges that define between them a slot that will be open to the surface of the concrete.
  • This invention relates to a device intended primarily for securing channelling of the kind described to metal or metal alloy shuttering, though it can be used with shuttering of timber or any other suitable material.
  • Concrete insert channelling can be used in conjunction with numerous readily available fittings to provide supports for electrical and mechanical services, such as cables and pipes, subsidiary structures, such as suspended ceilings; lights, and many other fittings.
  • a device for securing concrete insert channelling to shuttering comprises sealing means for location between the inturned flanges of the channel and the shuttering; at least one bolt having a shaped head engageable through the slot of the channelling with the inturned flanges thereof and a shank which then extends between the inturned flanges and through an aperture in the shuttering; and a lever pivotally attached to the bolt shank and having a cam surface adjacent the bolt shank; the arrangement being such that as the lever is pivotted relative to the bolt shank from a released position to a locked position the cam surface area acts (directly or indirectly) on the opposite side of the shuttering to the channelling (the outside) to pull the channelling towards the shuttering and apply sufficient pressure to the sealing means to ensure a seal between the channelling and the shuttering to substantially prevent ingress of concrete or any constituent thereof into the channelling.
  • the sealing means is preferably a single strip of material wide enough to engage both flanges of the channelling and apertured for passage of the bolt head(s); however, two separate strips, one for each flange, could be used.
  • the sealing means is of resilient solid material, such as synthetic or natural rubber or softwood lathing, but non-resilient compressible seals (e.g. of expanded polystyrene or cardboard or even ribbons of a mastic sealant) could be used if desired.
  • the bolt head is preferablyy rectangular or approximately so; its shank need not be threaded, though a threaded shank provides a convenient means of adjustment for variations in the thickness and/or the sealing means, as further described below.
  • the shank includes a square or otherwise non-circular portion which can be engaged to hold the bolt against rotation in alternative positions such that its shaped head extends either longitudinally or transversely of the channelling.
  • the device also comprises a bush which fits in the aperture in the shuttering, has an aperture through which the bolt shank passes, and has a flange or other abutment for engaging the shuttering on the opposite side of the shuttering to the channelling.
  • the cam surface on the lever preferably acts on the bush.
  • a locking projection, screw or the like which extends into an auxiliary aperture in the shuttering prevents rotation of the bush relative to the shuttering.
  • a portion (or the whole) of the aperture of the bush may then have a non-circular cross-section for engagement with the non-circular part of the bolt.
  • a helical compression spring is positioned between, and engages, the bush and the bolt head to urge them apart and so disengage the non-circular sections when the lever is in the release position.
  • the bush may be of any tough non-metallic or metallic material that will not cause corrosion problems; hard plastics materials are preferred.
  • the lever is connected to the bolt by a pin or pins weak enough to shear under a force higher than will normally be applied to it but less than the force required to cause damage to the channelling; this eliminates risk of the channelling being damaged as a result of the shuttering being removed without releasing the device, and the shear pin(s) can be easily and cheaply replaced. This is both technically better and cheaper than the use of a shear-head bolt.
  • the pins or pins may engage directly in holes in the shank of the bolt, but if adjustment is desired it is preferable for the pin or pins to engage in holes in a nut threaded on the bolt; preferably the bolt is slotted and the pin or pins extend into the slot to ensure a correct angular relationship between the pivot axis and the bolt head.
  • the channelling has anchors to assist securing the channelling in the concrete formed by stamping our portions of the base of the channelling to leave apertures in the base, preferably these apertures are sealed to substantially prevent ingress of concrete by a cap as described in our pending UK Patent Application No. 8302741 filed lst February, 1983, but alternatively a polystyrene infill in the channelling can be used in the customary way.
  • the inturned flanges of the channelling may have series of teeth formed in them.
  • the bolt head preferably has ribs which interengage with the teeth to prevent the bolt sliding longitudinally in the channel, in accordance with our British Patent Serial No. 2050549B.
  • the invention includes a method of casting concrete with concrete insert channelling embedded in it using the devices described.
  • the invention also includes sealing means for use in the device herein described.
  • a length of concrete insert channelling 1 is to be embedded in concrete that will occupy the area above (as drawn) steel shuttering 2.
  • the channelling 1 comprises a base 3, walls 4, inturned flanges 5 and anchors 6 in the form of L-shaped projections pressed from the base of the channelling.
  • a rubber sealing strip 7 extends longitudinally of the channelling 1 and aligned apertures 8,9 in the shuttering 2 and the rubber strip respectively receive the main body of respective fixing devices.
  • the essential elements of this comprise a (threadless) bolt 10 and a lever 11 pivotted together by a shear pin 12.
  • the head 13 of the bolt is rectangular and when rotated through 90° from the position shown passes freely between the flanges 5 of the channelling and preferably through the hole 8 in the shuttering 2 as well, though this is not essential.
  • the lever 11 has a cam surface 14 which bears on the underside 15 (outside) of the shuttering 2, through the flange 16 of a nylon bush 17 in the design shown, to tension the bolt 10 when the lever 11 is in the position shown (the locked position).
  • the bolt 10 is formed with a square section 18 and at least the part 19 of the bore of the bush 17 that receives it is of corresponding cross-section, so that relative rotation is prevented when the lever 11 is locked; a screw or other pin 21 holds the bush 17 against rotation with respect to the shuttering 2.
  • a compression spring 22 urges the bolt 10 upwards until the square section 18 is clear of the bush 17, allowing rotation of the bolt 10 through 90° to a release position, in which position it can be locked in preparation for removal of the shuttering 2; it cannot be locked in any intermediate position. Failure to put the device in the release position before removal of the shuttering 2 results in shearing of the pin 12, without risk to the channelling 1 (or to the shuttering); the remaining parts can been collected and re-assembled with a new pin.
  • the lever 11 can be fixed in the locked position by a spring 23 engaging a hook 24 welded to the shuttering 2; similar means may be used to fix it in its release position, or if a pair of neighbouring devices are arranged with their levers pointing towards each other, they may both be locked by a spring, or strapping, interconnecting their levers.
  • the device of Figures 2-5 is similar to that shown in Figure 1 (similar parts have been given the same reference number), except that provision is made for adjustment in the spacing of the pivot from the bolt head 13.
  • the bolt is threaded and receives a nut 2 6 which is drilled transversely at 27 to provide a pivot axis.
  • the bolt shank is formed with a slot 28, and the shear pins 29, 30 (two are used for convenience) penetrate into this slot 28 through hole 27 in the nut 26 in order to prevent relative rotation between nut and bolt (so that adjustment is available in steps of half a turn).

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Moulds, Cores, Or Mandrels (AREA)
  • Snaps, Bayonet Connections, Set Pins, And Snap Rings (AREA)
  • Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)
  • Joining Of Building Structures In Genera (AREA)
EP84300904A 1983-02-14 1984-02-13 Dispositif de fixation Withdrawn EP0116476A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB838304060A GB8304060D0 (en) 1983-02-14 1983-02-14 Securing device
GB8304060 1983-02-14

Publications (2)

Publication Number Publication Date
EP0116476A2 true EP0116476A2 (fr) 1984-08-22
EP0116476A3 EP0116476A3 (fr) 1985-11-27

Family

ID=10537965

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84300904A Withdrawn EP0116476A3 (fr) 1983-02-14 1984-02-13 Dispositif de fixation

Country Status (2)

Country Link
EP (1) EP0116476A3 (fr)
GB (2) GB8304060D0 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2735525A1 (fr) * 1995-06-13 1996-12-20 Couvraneuf Sa Profil pour realiser un sillon de drainage entre deux troncons de revetement d'un tunnel
WO1997006324A1 (fr) * 1995-08-04 1997-02-20 Reymann Technik Gmbh Systeme de coffrage pour pieces prefabriquees en beton

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101377094B (zh) * 2007-08-31 2011-08-24 北京住总集团有限责任公司 模板密封对接边与统一型可调结构

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2803055A (en) * 1949-04-29 1957-08-20 Charles N Stanley Clamps for concrete forms
US3157966A (en) * 1961-07-10 1964-11-24 Grinnell Corp Concrete insert
US3159393A (en) * 1963-02-11 1964-12-01 Villano Joseph Assembly insert holder
US3599386A (en) * 1967-12-26 1971-08-17 Youngstown Sheet And Tube Co Protective closure member and process for using the same

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2803055A (en) * 1949-04-29 1957-08-20 Charles N Stanley Clamps for concrete forms
US3157966A (en) * 1961-07-10 1964-11-24 Grinnell Corp Concrete insert
US3159393A (en) * 1963-02-11 1964-12-01 Villano Joseph Assembly insert holder
US3599386A (en) * 1967-12-26 1971-08-17 Youngstown Sheet And Tube Co Protective closure member and process for using the same

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2735525A1 (fr) * 1995-06-13 1996-12-20 Couvraneuf Sa Profil pour realiser un sillon de drainage entre deux troncons de revetement d'un tunnel
WO1997006324A1 (fr) * 1995-08-04 1997-02-20 Reymann Technik Gmbh Systeme de coffrage pour pieces prefabriquees en beton
US6082701A (en) * 1995-08-04 2000-07-04 Reymann Technik Gmbh Formwork system for prefabricated concrete parts

Also Published As

Publication number Publication date
EP0116476A3 (fr) 1985-11-27
GB2134958B (en) 1986-03-12
GB8304060D0 (en) 1983-03-16
GB8403741D0 (en) 1984-03-14
GB2134958A (en) 1984-08-22

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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17P Request for examination filed

Effective date: 19840306

AK Designated contracting states

Designated state(s): AT BE CH DE FR GB IT LI LU NL SE

R17P Request for examination filed (corrected)

Effective date: 19850122

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Designated state(s): AT BE CH DE FR GB IT LI LU NL SE

STAA Information on the status of an ep patent application or granted ep patent

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18W Application withdrawn

Withdrawal date: 19860520

RIN1 Information on inventor provided before grant (corrected)

Inventor name: DELHEES, PETER