EP0806530A1 - Tirant de coffrage pour l'érection des coffrages de béton - Google Patents

Tirant de coffrage pour l'érection des coffrages de béton Download PDF

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Publication number
EP0806530A1
EP0806530A1 EP97830176A EP97830176A EP0806530A1 EP 0806530 A1 EP0806530 A1 EP 0806530A1 EP 97830176 A EP97830176 A EP 97830176A EP 97830176 A EP97830176 A EP 97830176A EP 0806530 A1 EP0806530 A1 EP 0806530A1
Authority
EP
European Patent Office
Prior art keywords
clamping device
pair
plates
abutment
risers
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.)
Granted
Application number
EP97830176A
Other languages
German (de)
English (en)
Other versions
EP0806530B1 (fr
Inventor
Riccardo Bailetti
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 EP0806530A1 publication Critical patent/EP0806530A1/fr
Application granted granted Critical
Publication of EP0806530B1 publication Critical patent/EP0806530B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • E04G11/00—Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs
    • E04G11/06—Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs for walls, e.g. curved end panels for wall shutterings; filler elements for wall shutterings; shutterings for vertical ducts
    • E04G11/062—Forms for curved walls
    • 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
    • E04G17/00—Connecting or other auxiliary members for forms, falsework structures, or shutterings
    • E04G17/06—Tying means; Spacers ; Devices for extracting or inserting wall ties
    • E04G17/07—Tying means, the tensional elements of which are fastened or tensioned by means of wedge-shaped members

Definitions

  • the present invention relates to clamping devices used for erecting casting forms for concreting works and more in particular though not exclusively to realize curved formworks.
  • these clamping systems include specially designed steel risers against which the lining panels or planking bear, linked by spacer blades having terminal slots in which blocking wedges may be are inserted.
  • the spacer blades pass through slots present at regular intervals along the specially designed steel risers so that the blocking wedges bear directly on the steel risers that may have the form of a slotted channel having a "C" shaped cross section.
  • the clamping system of the invention is characterized by employing special reaction plates having a generally undulated or multi-channelled shape, capable of establishing abutment with the external face of the lining over at least two and eventual!y over three flat surfaces spaced from each other therecf, which directly bear against the external outside surface of the lining planks or bcards. Eventually all three spaced abutment surfaces of the reaction plates may bear on the lining bent along a circumference tangent to the three spaced surfaces.
  • Each reaction plate can be fabricated by stamping from a steel sheet and the stamping mold defines at least two parallel channels in the plate.
  • the pair of parallel channels accommodate a pair of parallel risers of the clamping system.
  • Each reaction plate of the clamping system of the invention presents a first abutment surface (with the exterior of the lining of the formwork) defined between the two parallel channels of the stamped plate, while a second and a third abutment surfaces are provided by the "cantilevered" portions of the reaction plate that extend sideways of the two parallel channels thereof.
  • reaction plates of the clamping system of the present invention are coplanar to each other, but not necessarily coplanar to the central abutment surface defined between the two parallel channels.
  • the plates may indeed be fabricated in two versions, one with the central abutment surface depressed in respect to the plane of the two lateral abutment surfaces and the other with the central surface raised in respect to the plane of the two lateral abutment surfaces.
  • the plates fabricated according to the first version are for general use and they are most preferably used to react against the "outer lining of a curved formwork while the plates fabricated according to the second version, are preferably used to react against the "inner" lining of a curved formwork.
  • reaction plates of the clamping devices of the system of the present invention have surfaces bearing against the lining material of the formwork, that typically may be undersized planking, standard boards or equivalent material, that are substantially flat and free of sharp edges that could incise or damage the wooden lining material.
  • each plate makes them effectively usable in association with relatively inexpensive risers, typically in the form of art segments of steel roas commonly used in reinforced concrete instead of specifically coordinated drawn steel channels. This because the rods, notwithstanding their roughness, are completely accommodated in the channels of the linking plate thus preventing damages to the wooden lining at the highly loaded linking points.
  • clamping system of the present invention while using special though relatively low cost reaction plates in conjunction with a pair of extremely low cost steel rod risers, does not require expendable spacer blades of special shape and lengths, but accepts the use of the same expendable spacer blades that are really available and used in the known clamping systems.
  • the blocking wedges bear against the outer face of the reaction plate, through a hole of which the spacer blade passes, thus protecting the lining from damages.
  • a clamping system particularly suitable for erecting curved formworks, is characterized in that it uses pairs of undulated reaction plates 1 and 2.
  • Each plate defines a pair of parallel channels, respectively 3, 4 and 5, 6, capable of accommodating cooperating pairs of rod-shaped risers 7, 8 and 9, 10, respectively.
  • the clamping system of the present invention may readily accept the use of common and relatively cheap reinforced concrete rods as risers.
  • Each plate presents three flat surfaces that may all lean against the lining material: a first central surface 11 and 12, and two lateral surfaces, 13, 14 and 15, 16, respectively, of "cantilevered" side portions of the reaction plate.
  • the edges of the plates are slightly curved in order to eliminate sharp edges coplanar to the abutment plane which might incise the lining plankings or boards.
  • the central abutment surface, 11 and 12, of the two opposed reaction plates 1 and 2 lean against the outer surface of the linings A and B.
  • a circular hole (as opposed to a slot) permits any mutual orientation of the spacer blade (which must pass through two abutted timber planks or panels of the lining) and the risers (and consequently the reaction place coupled thereon). This is important because in fabricating curved molds often such a mutual orientation is not orthogonal.
  • the generation upon the stamping of the reaction plate of a raised collar 21 around the central hole 20 for the passage of the linking blade, by appropriately configuring the stamping die, provides for a more effective action of the blocking wedges.
  • the raised collar 21 provides a raised reaction surface abutting against the edge of the wedge (18, 19).
  • the raised collar 21 prevents accidental indentations of the rim of the hole 20 from cutting the lining.
  • the raised collar 21 provides a certain degree of elasticity that helps mounting and dismantling of the wedges 18, 19, besides spacing them from rubbing on the outer surface of the reaction plate.
  • all the reaction plates are provided also with a raised collar 21 around the central hole 20 of the plate through which the linking blade passes.
  • the cooperating plates 1 and 2 may be built in different shapes from one another, specifically for facilitating their coordinated use in erecting curved formworks.
  • Fig. 3 shows the preferred shape of a plate 1 for general use and specifically suited to be used on the outer lining of a curved formwork.
  • the plate 1 has the central abutment surface 11 that is depressed in respect to the plane of abutment of the side surfaces 13 and 14.
  • Fig. 4 shows the preferred shape of a plate specifically suited to be used on the inner lining of a curved formwork.
  • the plate 2 has the central abutment surface 12 raised in respect to the plane of abutment of the lateral surfaces 15 and 16 (see Fig. 2).
  • a raised circular collar 21 is preferably formed upon the stamping of the plate, in order to provide a raised circular surface on which the blocking wedges (18 and 19 of Figures 1 and 2) abut, thus remaining slightly spaced from the remaining outer surface of the central portion of the plate.
  • reaction plates may have their spaced abutment surfaces substantially tangent to the circumference of the lining so as to react against the outside surface of the lining material with a minimum of stress concentration.
  • reaction plates of the linking device of the system of the invention have been described in relation to most commcn embodiments, it will be evident to the reader that the plates 1 and 2 do not necessarily need to be generally rectangular but they may also be circular or of any other shape. Moreover, special plates may become useful in special situations such as plates that substantially repeat the essential features in two different directions, that is provided with pairs of channels, crossing each other, orthogonally or in any other mutual orientation.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)
  • Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Lining And Supports For Tunnels (AREA)
  • On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
EP97830176A 1996-04-17 1997-04-15 Tirant de coffrage pour l'érection des coffrages de béton Expired - Lifetime EP0806530B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITVA960006U 1996-04-17
IT1996VA000006U IT242213Y1 (it) 1996-04-17 1996-04-17 Dispositivo di ammorsatura per realizzare casseforme curve

Publications (2)

Publication Number Publication Date
EP0806530A1 true EP0806530A1 (fr) 1997-11-12
EP0806530B1 EP0806530B1 (fr) 2003-07-09

Family

ID=11423362

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97830176A Expired - Lifetime EP0806530B1 (fr) 1996-04-17 1997-04-15 Tirant de coffrage pour l'érection des coffrages de béton

Country Status (5)

Country Link
EP (1) EP0806530B1 (fr)
AT (1) ATE244806T1 (fr)
DE (1) DE69723354D1 (fr)
ES (1) ES2202568T3 (fr)
IT (1) IT242213Y1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1149964A3 (fr) * 2000-04-12 2004-01-02 Riccardo Bailetti Dispositif de connection de coffrages

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB446750A (en) * 1934-11-01 1936-05-01 Trussed Concrete Steel Co Improvements in shuttering devices for casting walls or the like of concrete or other material
CH538032A (de) * 1971-11-29 1973-06-15 Aargauische Kantonalbank Bauschalung, deren Schalungsbretter Schichtholzlagen aufweisen
GB2133826A (en) * 1983-01-11 1984-08-01 Acrow Adjusting curvature of formwork

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB446750A (en) * 1934-11-01 1936-05-01 Trussed Concrete Steel Co Improvements in shuttering devices for casting walls or the like of concrete or other material
CH538032A (de) * 1971-11-29 1973-06-15 Aargauische Kantonalbank Bauschalung, deren Schalungsbretter Schichtholzlagen aufweisen
GB2133826A (en) * 1983-01-11 1984-08-01 Acrow Adjusting curvature of formwork

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1149964A3 (fr) * 2000-04-12 2004-01-02 Riccardo Bailetti Dispositif de connection de coffrages

Also Published As

Publication number Publication date
DE69723354D1 (de) 2003-08-14
EP0806530B1 (fr) 2003-07-09
IT242213Y1 (it) 2001-06-04
ATE244806T1 (de) 2003-07-15
ITVA960006U1 (it) 1997-10-17
ES2202568T3 (es) 2004-04-01

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