EP2602396B1 - A mating and fixing device for disposable forms - Google Patents

A mating and fixing device for disposable forms Download PDF

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Publication number
EP2602396B1
EP2602396B1 EP12194273.4A EP12194273A EP2602396B1 EP 2602396 B1 EP2602396 B1 EP 2602396B1 EP 12194273 A EP12194273 A EP 12194273A EP 2602396 B1 EP2602396 B1 EP 2602396B1
Authority
EP
European Patent Office
Prior art keywords
tab
seat
base
form according
lip
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.)
Active
Application number
EP12194273.4A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2602396A1 (en
Inventor
Giovanni Serafin
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.)
Tps Srl
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Tps Srl
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Publication date
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Publication of EP2602396A1 publication Critical patent/EP2602396A1/en
Application granted granted Critical
Publication of EP2602396B1 publication Critical patent/EP2602396B1/en
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Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B5/00—Floors; Floor construction with regard to insulation; Connections specially adapted therefor
    • E04B5/48—Special adaptations of floors for incorporating ducts, e.g. for heating or ventilating
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F15/00—Flooring
    • E04F15/02—Flooring or floor layers composed of a number of similar elements
    • E04F15/024—Sectional false floors, e.g. computer floors
    • E04F15/02405—Floor panels
    • E04F15/02417—Floor panels made of box-like elements
    • E04F15/02423—Floor panels made of box-like elements filled with core material
    • E04F15/02429—Floor panels made of box-like elements filled with core material the core material hardening after application
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F15/00—Flooring
    • E04F15/12—Flooring or floor layers made of masses in situ, e.g. seamless magnesite floors, terrazzo gypsum floors
    • E04F15/123—Lost formworks for producing hollow floor screed layers, e.g. for receiving installations, ducts, cables

Definitions

  • the present application relates to a disposable form made of plastic material for obtaining sanitary voids, ventilated air gaps, crawl spaces, ventilated floors and roofs, the disposable form comprising a mating and fixing device.
  • US Patent 3,334,458 is known which relates to a form for foundations composed of a dome-shaped element that can be arranged adjacent to others in order to define a structure on which the casting of concrete is performed so as to obtain a ventilated floor slab.
  • this solution has, at the archivolts, perimetric planar flanges that have protrusions, which protrude above said archivolts, so as to mutually connect adjacent domes (by folding said flanges).
  • the concrete is in fact in the liquid phase and applies high pressures, especially on the legs.
  • EP0803618 is also known which claims two Italian priorities, and relates to a modular supporting and ventilation element for floors, and therefore to a form, in which a plurality of said modular elements can be coupled in order to provide a substantially continuous structure.
  • the document EP 1 978 174 discloses a disposable form according to the preamble of claim 1.
  • Stiffening means are present that pass through the center of the upper face and extend along the legs in which, at the upper face, there is at least one supporting and reinforcement pillar-like element in an underlying position.
  • stiffening means and the pillar-like element do not solve the problem described earlier, because the pressure of the concrete in the liquid phase still entails the opening of the joint between adjacent forms because of the flexing of the legs, thus thwarting the function of the form.
  • legs with slots in which, after the forms have been placed mutually adjacent, a key is inserted which has a handle at one end of which there is an abutment with a circular plan shape from which a T-shaped retention means protrudes which is composed of a stem, protruding axially from said abutment and having a head that is arranged so as to be rotated through approximately ninety degrees with respect to said handle.
  • the head can be inserted in the slots and is then rotated so that it abuts against the adjacent surface of the leg and retains the other leg at the abutment provided on the handle.
  • the key is subject to possible detachments due also to an incorrect placement thereof by the operators, who have to insert four of them for each pillar of the form (one for each pair of adjacent legs).
  • the use of the key requires high precision in the mutually adjacent arrangement of the legs of the forms because if the slots between two adjacent legs do not match up, the insertion of the key is blocked; this misalignment can be due also to the imperfect planarity of the site in which the forms are arranged or due to the presence of residual material, such as very fine gravel, that has not been removed.
  • this misalignment can also be due to different shrinkages of the recycled plastic material.
  • the slots can also be blocked by the flashes of plastic material that form during molding because of the recycled material.
  • the first one is the management of a second part (the key) and the second one is the difficulty in inserting the key after placing the forms on the ground, in an awkward position for the operator; both of these problems, moreover, increase laying costs.
  • the aim of the present invention is therefore to solve the highlighted technical problems, eliminating the drawbacks of the cited background art and therefore devising an invention that makes it possible to obtain a ventilated floor slab by using disposable forms made of plastic material for obtaining sanitary voids, ventilated air gaps, crawl spaces, ventilated floors and roofs, which allow casting of the concrete in a single step, maintaining the forms in the correct position and avoiding possible openings of the joint between adjacent forms due to the flexing of the legs under the pressure of the concrete.
  • an object of the present invention is to provide a device that allows stable mutually adjacent arrangement of the forms in a manner which is quick and easy for the installers.
  • Another object is to obtain a device that is structurally simple and convenient to be used, that has both low provision costs and installation costs and can be provided with usual known systems.
  • a disposable form according to claim 1 made of plastic material for obtaining sanitary voids, ventilated air gaps, crawl spaces, ventilated floors and roofs, which have an upper surface that is blended, at the corners, with vertically arranged lateral legs, the disposable form comprising a mating and fixing device constituted by at least one tab, which protrudes substantially longitudinally with respect to said lateral legs and cooperates selectively with at least one seat provided at said lateral legs, said at least one tab and at least one seat having a configuration and an arrangement which are adapted to allow stacking of two or more of said forms.
  • the reference numeral 1 designates a mating and fixing device for disposable forms 2 made of plastic material for obtaining sanitary voids, ventilated air gaps, crawl spaces, ventilated floors and roofs.
  • Each form 2 made of plastic material has an upper surface 4, which is flat or arc-like and has a polygonal plan shape, preferably a square or rectangular one.
  • the upper surface 4 is blended, at the corners 5, with four lateral legs 6, which are arranged vertically so as to act as a support for the form.
  • the lateral legs 6 and the upper surface 4 are mutually blended by arches 7 which delimit openings 8.
  • Lips 9, which have a substantially U-shaped transverse cross-section, are present and protrude at said openings 8 and at the arches 7 so as to form a base 14; said lips are adapted to allow partial overlapping with other lips of adjacent forms.
  • feet 10 for resting on the ground that have suitable centering and engagement means for other forms.
  • the forms are arranged against each other and the lips 9 partially overlap so as to form a structural continuity over which to cast the concrete.
  • the mating and fixing device 1 can be applied to disposable forms made of plastic material for sanitary voids, ventilated air gaps, crawl spaces, ventilated floors and roofs because the legs of known products flex and open under the pressure of the concrete during casting.
  • the device is constituted by at least one tab 11, which has a substantially conical or frustum-like shape.
  • the tab 11 has a conical shape with the vertex 12 directed toward the foot 10 of the lateral leg 6.
  • the tab 11 protrudes substantially longitudinally to the lateral leg 6 at a step 13 provided at the base 14 of the lip 9, preferably approximately halfway along the height of said leg 6.
  • the step 13 protrudes toward the outside of the base 14 of the lip 9 so as to form, in the direction of the foot 10, a protrusion 15 that is substantially parallel to the base 14 of the lip 9 and terminates by blending with the foot 10.
  • the tab 11 protrudes downward to the rear of the protrusion 15.
  • the tabs 11 protrude at two adjacent openings 8 of said legs 6.
  • At least one seat 16 forms part of the device 1, cooperates selectively with said at least one tab 11 and is shaped complementary thereto.
  • said seat 16 is constituted by a hole within which said tab 11 can be arranged selectively.
  • the at least one seat 16 also is provided at said lateral leg 6; in the particular embodiment, the seat 16 is provided at a step 17.
  • the step 17 is, again in the particular embodiment, provided at the base 14 of the lip 9, at a height comprised between said foot 10 and the connection to the upper surface 4 and in any case at such a height as to allow cooperation with the tabs 11.
  • the step 17 is provided approximately halfway along the height of said leg 6 and in any case at a slightly different height than the step 13, in order to allow optimum overlapping.
  • the step 17 protrudes toward the outside of the base 14 of the lip 9 so as to form, in the direction of the foot 10, a similar protrusion 15 that is substantially parallel to the base 14 of the lip 9 and terminates by blending with the foot 10.
  • the seats 16 are provided at two adjacent openings 8 of said legs 6 that are not affected by said tabs 11.
  • the overlapping of the lips 9 corresponds to the insertion of the tabs 11 in the seats 16 and the subsequent mutual locking of the legs 6 of the adjacent forms 2.
  • the invention allows installers to quickly and easily arrange the forms mutually adjacent, obtaining, already in this step, the mutual stable interconnection thereof and thus avoiding any openings of the joint between adjacent forms at the legs and thus preventing the concrete from leaking into the cavity below the forms during the casting step.
  • the invention allows mutual coupling and fixing of the legs of said forms without requiring the use of any additional element or of particular skill by the installer, reducing at the same time the laying time and the total costs.
  • the shape and arrangement of the tabs 11 and of the seats 16 make it possible to achieve stacking of multiple forms, optimizing the costs for storage and transport.
  • the mating and fixing device is constituted again by a tab 11, which has a substantially conical or frustum-like shape that, in the particular embodiment shown, has a limited length and a vertex 12 that is directed toward the foot (not shown) of the lateral leg.
  • the device is also constituted by at least one seat 16 that cooperates selectively with the at least one tab 11 and is shaped complementary thereto.
  • the seat 16 has a box-like shape and accommodates the tab 11 inside it.
  • Figure 13 shows a mating and fixing device which is constituted again by a tab 11, which has a substantially lance-like shape and a vertex directed toward the foot (not shown) of the lateral leg.
  • the tab 11 protrudes toward the outside of the base 14 of the lip 9 so as to form, in the direction of the foot, a protrusion 15 that is substantially parallel to the base 14 of the lip 9 and terminates by blending with the foot.
  • the device is further constituted by at least one seat 16 that cooperates selectively with said at least one tab 11 and is shaped complementary thereto.
  • the seat 16 has a pocket-like shape so as to accommodate the tab 11 inside it and protrudes at the base 14 of the lip 9, at such a height as to allow cooperation with the tabs 11.
  • Figure 14 illustrates a mating and fixing device in which there are again a tab 11 and a seat 16, which however are provided in a mirror-symmetrical fashion with respect to the solution illustrated in Figure 13 , the tab 11 protruding toward the inside of the base 14 of the lip 9 to form, in the direction of the foot, a protrusion 15 that is substantially parallel to the base 14 of the lip 9 and terminates by blending with the foot (not illustrated).
  • the step 13 can also protrude toward the inside of the base 14 of the lip 9, and so can the step 17.
  • the at least one tab 11 can protrude downward, to the rear of the protrusion 15, or upward, in front of the base 14 of the lip 9.
  • the number of the tabs 11 and seats 16 can also vary depending on the specific requirements; thus, for example, two seats 16 and two tabs 11 can be used for each device.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Engineering & Computer Science (AREA)
  • Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)
  • Floor Finish (AREA)
  • Clamps And Clips (AREA)
EP12194273.4A 2011-12-06 2012-11-26 A mating and fixing device for disposable forms Active EP2602396B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT000168A ITTV20110168A1 (it) 2011-12-06 2011-12-06 Dispositivo di accoppiamento e fissaggio per casseri a perdere.

Publications (2)

Publication Number Publication Date
EP2602396A1 EP2602396A1 (en) 2013-06-12
EP2602396B1 true EP2602396B1 (en) 2016-07-20

Family

ID=45470679

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12194273.4A Active EP2602396B1 (en) 2011-12-06 2012-11-26 A mating and fixing device for disposable forms

Country Status (4)

Country Link
EP (1) EP2602396B1 (pt)
BR (1) BR102012031142B1 (pt)
ES (1) ES2599614T3 (pt)
IT (1) ITTV20110168A1 (pt)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITTV20110168A1 (it) 2011-12-06 2013-06-07 T P S S R L Dispositivo di accoppiamento e fissaggio per casseri a perdere.

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3334458A (en) 1963-10-21 1967-08-08 John C Leemhuis Structural member
DE69702681T2 (de) 1996-04-23 2000-12-28 Valerio Pontarolo Modulares Element zur Unterstützung und Lüftung von Decken
ITTV20070059A1 (it) * 2007-04-04 2008-10-05 T P S Srl Procedimento per l'ottenimento di un elemento di copertura modulare, particolarmente per la realizzazione di pavimenti aerati o solai di edifici.
ES2308941B1 (es) * 2008-02-29 2009-07-28 Industrias Tomas Morcillo, S.L. Suelo tecnico y procedimiento de instalacion.
IT1396973B1 (it) * 2009-11-12 2012-12-20 Da Dalt Elemento edilizio modulare per la realizzazione di intercapedini in genere, ad esempio vespai, pavimenti e tetti areati
ITTV20110168A1 (it) 2011-12-06 2013-06-07 T P S S R L Dispositivo di accoppiamento e fissaggio per casseri a perdere.

Also Published As

Publication number Publication date
EP2602396A1 (en) 2013-06-12
ITTV20110168A1 (it) 2013-06-07
BR102012031142A2 (pt) 2015-01-13
BR102012031142B1 (pt) 2020-11-10
ES2599614T3 (es) 2017-02-02

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