EP0049456A2 - Corps de moulage pour la production d'une cavité dans une pièce fabriquée en béton - Google Patents

Corps de moulage pour la production d'une cavité dans une pièce fabriquée en béton Download PDF

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Publication number
EP0049456A2
EP0049456A2 EP81107707A EP81107707A EP0049456A2 EP 0049456 A2 EP0049456 A2 EP 0049456A2 EP 81107707 A EP81107707 A EP 81107707A EP 81107707 A EP81107707 A EP 81107707A EP 0049456 A2 EP0049456 A2 EP 0049456A2
Authority
EP
European Patent Office
Prior art keywords
shaped body
steel plate
bore
section
cross
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Withdrawn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
EP81107707A
Other languages
German (de)
English (en)
Other versions
EP0049456A3 (fr
Inventor
Siegfried Fricker
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0049456A2 publication Critical patent/EP0049456A2/fr
Publication of EP0049456A3 publication Critical patent/EP0049456A3/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Withdrawn legal-status Critical Current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
    • E04G15/04—Cores for anchor holes or the like around anchors embedded in the concrete
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B23/00—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects
    • B28B23/005—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects with anchoring or fastening elements for the shaped articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B7/00—Moulds; Cores; Mandrels
    • B28B7/28—Cores; Mandrels

Definitions

  • the invention relates to a molded body for producing a recess corresponding to its negative shape in a prefabricated concrete part, wherein fastening devices are provided in the molded body for connection to the formwork during the concreting process.
  • Such known moldings are firmly attached to the inside of the formwork for the later precast concrete. After pouring the concrete and setting the concrete, the formwork is loosened and the molded body is removed from the finished precast concrete element, so that a recess on the concrete surface corresponding to the negative shape of the molded body is created.
  • the object of the invention is therefore to develop the known moldings in such a way that their attachment to the formwork and the detachment from the formwork can take place more quickly, and to form this attachment insensitive to dirt, easy to handle and inexpensive to manufacture.
  • the fastening devices include at least one bore, that a metal plate is connected to the shaped body in such a way that at least part of the bore is accessible through an opening provided in the metal plate and deviating from the circular shape, and that the cross section and the Wall material of the accessible lower bore part allows the steel plate to engage behind through at least one shoulder of a connecting device for producing a bayonet connection.
  • the basic idea of the invention is therefore to enable a bayonet connection between the external connecting device and the steel plate in the shaped body instead of the screw thread in the molded body, which is susceptible to contamination, and the screwing and unscrewing of the connecting device into this thread. Pollution no longer play an important role here, which also leads to a considerable increase in the service life, and the detachment of the molded body from the formwork can be achieved in a single operation.
  • a first embodiment of the invention provides that the steel plate is inserted into the bore so that it bisects the bore and that the cross section of the upper bore part corresponds to the cross section of the opening of the steel plate.
  • An embodiment of this embodiment provides that the wall of the upper bore part consists of rigid material. This gives the interior of the molded body the necessary mechanical stability and, in particular, enables the forces directed towards the top of the molded body to be absorbed when the bayonet connection is tightened, without deformation of the molded body occurring.
  • the wall of the lower bore part is made of elastic material.
  • a further embodiment provides that the cross section of the lower bore part corresponds to the cross section of the opening of the steel plate rotated by 90 °.
  • this embodiment leads to an engagement of the connecting device in correspondingly shaped at 90 0 offset recesses for cross-section of the lower bore portion.
  • FIG. 1 shows a molded body 10 which, together with an anchor 50, is cast into a prefabricated concrete part 80, from which the formwork 70 is being removed.
  • the molded body 10 is attached to the inside of the formwork 70.
  • the mold carrier cannot be removed with the formwork and then the connection between the molded body and the formwork can be released, but here the molded body initially remains in the prefabricated concrete part, since the molded body must be bent open due to the cast-in anchor 50 in order to to release him generated recess in the precast 80.
  • the various openings 22, 23, 32 and 33 serve to introduce various connecting devices for fastening the molded body 10 to the formwork 70.
  • the bore 23 is designed according to the invention with a steel plate 24 embedded therein, as will be explained in more detail below.
  • the essential components of the molded body are two core parts 20 and 30, which are surrounded by a jacket 40 and are connected to one another via an elastic connecting bridge 41 formed by this jacket.
  • a nose is attached, the dimensions of which are matched to the passage opening of the anchor 50, so that these two lugs define the anchor 50 in its later position in the finished prefabricated concrete part.
  • the jacket 40 In its upper edge region, the jacket 40 has a shoulder 42 with which the molded body is pulled into the inside of the formwork 70 by the known fastening devices mentioned at the beginning or the fastening according to the invention.
  • a steel plate 24 is inserted into the bore 23 to cooperate with a threaded rod 60, the front end of which has shoulders 63, which is roughly half of this in an upper bore part 231 and a lower bore part 232
  • the wall of the upper bore part 231 consists of the hard core material
  • the wall of the lower part 232 of the bore consists of the softer material of the jacket 40.
  • the opening 241 of the steel plate 24 deviates from the circular shape in that it has two diametrically opposed semicircular indentations 242. This opening cross-section of the steel plate 24 corresponds to the cross-section of the upper part of the bore 231, so that, for example, the connecting device 60 shown in FIG .
  • the lower bore part 232 has a cross section that is smaller than that of the opening cross section 242 of the steel plate 24, namely a circular cross section without the semicircular guide grooves in the upper bore part 231, which correspond to the semicircular bulges 242.
  • the shoulders 63 on the connecting device 60 thus lead to an elastic deformation of the wall of the lower bore part 232 as soon as they have passed through the opening 241 of the steel plate 24.
  • This elastic Deformation means a certain resistance to further movement of the connecting device 60 into the lower bore part 232 and thus signals the handling person when the connecting device has reached or passed the steel plate 24.
  • the connecting device 60 is rotated by 90 ° in its longitudinal axis, so that the shoulders 63 now leave the formations 242 of the opening cross section 241 which correspond to them and engage behind the steel plate 24.
  • the connecting device 60 is rotated through 90 ° in its longitudinal axis again, so that the shoulders 63 of the connecting device 60 fit again through the semicircular shapes 242 of the steel plate 24 and thus loosen the bayonet connection.
  • the steel plate 24 is inserted into the shaped body in such a way that its surface is flush with the upper side of the shaped body. Accordingly, the bore 23 can be shorter.
  • the steel plate 24 has lateral anchoring elements in the form of legs 243, 244, which ensure sufficient hold in the molded body. It is possible to either anchor the legs 243, 244 firmly in the molded body, or to make them pluggable, so that the steel plate 24 is first tightened on the formwork 70 and then the molded body is plugged on.
  • opening cross section 241 of the steel plate 24 shown in the exemplary embodiments, a practically almost unlimited number of different opening cross sections is of course possible, which enable a bayonet connection together with correspondingly designed shoulders 63.
  • the choice of a suitable bayonet system depends on design and manufacturing considerations, both with regard to the molded body 10 and the connecting device 60.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Architecture (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Moulds, Cores, Or Mandrels (AREA)
  • Joining Of Building Structures In Genera (AREA)
EP81107707A 1980-10-04 1981-09-29 Corps de moulage pour la production d'une cavité dans une pièce fabriquée en béton Withdrawn EP0049456A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3037595 1980-10-04
DE3037595A DE3037595C2 (de) 1980-10-04 1980-10-04 Vorrichtung zur Erzeugung einer Aussparung in einem Betonfertigteil

Publications (2)

Publication Number Publication Date
EP0049456A2 true EP0049456A2 (fr) 1982-04-14
EP0049456A3 EP0049456A3 (fr) 1982-08-25

Family

ID=6113632

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81107707A Withdrawn EP0049456A3 (fr) 1980-10-04 1981-09-29 Corps de moulage pour la production d'une cavité dans une pièce fabriquée en béton

Country Status (3)

Country Link
US (1) US4383675A (fr)
EP (1) EP0049456A3 (fr)
DE (1) DE3037595C2 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2154980A (en) * 1984-02-29 1985-09-18 Francis Cunningham Lifting cast articles
US5535979A (en) * 1993-05-10 1996-07-16 Conac Limited Apparatus for use in forming recesses in cast bodies

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4593880A (en) * 1983-02-10 1986-06-10 Ex-Cell-O Corporation Device for supporting a preform insert in a mold
DE20200707U1 (de) * 2002-01-17 2003-06-12 Betomax Kunststoff Metall Anordnung zum Befestigen eines Trageelements an einem Bauteil
US7487949B2 (en) * 2002-12-06 2009-02-10 Dayton Superior Corporation Concrete dowel void former
US7004443B2 (en) * 2003-03-19 2006-02-28 Dayton Superior Corporation Concrete void former
US20060237875A1 (en) * 2005-04-21 2006-10-26 Nokia Corporation Releasable actuator rod assembly for a moving core element
FR2896526B1 (fr) * 2006-01-23 2008-04-04 Delplast Soc Par Actions Simpl Dispositif monobloc permettant de creer des reservations autour de la tete d'ancres de levage lors de la fabrication de pieces en beton
US7441375B2 (en) * 2006-11-06 2008-10-28 Lang Frank J Cover for pockets in precast concrete panels
US20100000175A1 (en) * 2008-07-02 2010-01-07 Rod Johnson Recess Forming and Anchor Positioning Apparatus
US8033810B2 (en) * 2009-06-17 2011-10-11 Progressive Components International Corporation Lock for core assembly for injection molding tool

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB866164A (en) * 1957-04-01 1961-04-26 Alexander Feldmann Method and means of forming cavities in cast materials such as concrete
GB1044473A (en) * 1964-05-07 1966-09-28 Ft Products Ltd Improvements in and relating to fasteners

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1964151U (de) * 1967-03-18 1967-07-13 Scherff Fa H Vorrichtung zum lagesicheren anordnen von betonbauelementen.
BE759831A (fr) * 1969-12-04 1971-05-17 Waerner Thor Moyens d'ancrage tubulaires pour constructions betonnees lors de leur coulee et procedes de fabrication et de depots de tels moyens
JPS5931925B2 (ja) * 1978-06-28 1984-08-06 積水化学工業株式会社 環状溝を有する強化プラスチツク管状体の成形方法及び成形型
DE2935825C2 (de) * 1979-09-05 1981-09-24 Ernst Dr.-Ing. 4300 Essen Haeussler Vorrichtung zur Erzeugung einer einen Ankerkopf konzentrisch umgebenden, etwa halbkugelförmigen Aussparung in der Oberfläche eines Stahlbetonfertigteiles

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB866164A (en) * 1957-04-01 1961-04-26 Alexander Feldmann Method and means of forming cavities in cast materials such as concrete
GB1044473A (en) * 1964-05-07 1966-09-28 Ft Products Ltd Improvements in and relating to fasteners

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2154980A (en) * 1984-02-29 1985-09-18 Francis Cunningham Lifting cast articles
US5535979A (en) * 1993-05-10 1996-07-16 Conac Limited Apparatus for use in forming recesses in cast bodies

Also Published As

Publication number Publication date
EP0049456A3 (fr) 1982-08-25
DE3037595C2 (de) 1984-02-23
DE3037595A1 (de) 1982-04-22
US4383675A (en) 1983-05-17

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