(19)
(11)EP 3 402 937 B1

(12)EUROPEAN PATENT SPECIFICATION

(45)Mention of the grant of the patent:
27.11.2019 Bulletin 2019/48

(21)Application number: 17707653.6

(22)Date of filing:  12.01.2017
(51)Int. Cl.: 
E04B 2/86  (2006.01)
E04G 9/10  (2006.01)
E04G 9/05  (2006.01)
E04G 17/06  (2006.01)
(86)International application number:
PCT/IB2017/000013
(87)International publication number:
WO 2017/122082 (20.07.2017 Gazette  2017/29)

(54)

SPACER ELEMENT FOR A DISPOSABLE FORMWORK FOR THE CONSTRUCTION OF WALLS AND DISPOSABLE FORMWORK INCORPORATING THE SPACER ELEMENT

ABSTANDHALTER FÜR EINE VERLORENE WANDSCHALUNG UND VERLORENE WANDSCHALUNG MIT EINEM SOLCHEN ABSTANDHALTER

ENTRETOISE POUR COFFRAGE PERDU POUR MURS ET COFFRAGE PERDU INCORPORANT UN TEL ENTRETOISE


(84)Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated Validation States:
MA

(30)Priority: 14.01.2016 IT UB20160199

(43)Date of publication of application:
21.11.2018 Bulletin 2018/47

(73)Proprietor: Flex House S.r.l.
60035 Jesi (AN) (IT)

(72)Inventor:
  • BIANCHI, Attilio
    60035 Jesi (AN) (IT)

(74)Representative: Cioncoloni, Giuliana 
Studio Consulenza Brevetti Cioncoloni S.r.l. Via Castrense, 21
00182 Roma
00182 Roma (IT)


(56)References cited: : 
EP-A2- 1 544 380
US-A1- 2012 233 950
US-A- 6 159 399
  
      
    Note: Within nine months from the publication of the mention of the grant of the European patent, any person may give notice to the European Patent Office of opposition to the European patent granted. Notice of opposition shall be filed in a written reasoned statement. It shall not be deemed to have been filed until the opposition fee has been paid. (Art. 99(1) European Patent Convention).


    Description


    [0001] The present invention relates to a spacer element for a disposable formwork and a disposable formwork incorporating such spacer element, wherein said formwork is intended in particular for the construction of walls, specifically both exterior enclosure walls and interior partition walls.

    [0002] More specifically this invention relates to a disposable formwork for the construction of a wall according to the preamble of annexed independent Claim 1.

    [0003] Various types of disposable form works are known for the construction of walls. A first example of a formwork for the construction of concrete walls is shown in international patent application no. WO 2014/091377, which actually refers to a disposable formwork comprising a plurality of opposing modular panels and a series of connecting means provided for coupling two panels arranged opposing one another at a certain distance from one another.

    [0004] Such connecting means display a rectilinear overturned "U" shape, wherein the two respective end portions are engaged within slots formed on the inside part of the same panels.

    [0005] Another modular formwork solution is described in international patent application no. WO 2014/042502.

    [0006] This formwork is formed by a series of panels arranged opposing one another and held together by various rows of spacer elements having a substantially rectangular shape, in which two through holes are afforded, arranged one above the other.

    [0007] Formworks of the known type, however, have various drawbacks and technical limits mainly connected with their use on the site.

    [0008] After the cement-based mortar has been cast in the formworks, there is normally a slow and inadequate setting of the cement-based mortar itself.

    [0009] A further example of a disposable formwork is shown in Italian patent application no. AN2015A000011 by the same Applicant, which, in fact, discloses a formwork substantially comprising two perforated panels, arranged opposing one another and joined through a series of spacer members.

    [0010] The object of the present invention is to overcome the problems of the prior art highlighted above and to further perfect the technical solution proposed by the same Applicant in Italian patent application no. AN2015A000011.

    [0011] Another object of the invention is to provide a disposable formwork for the construction of walls, that contributes to obtaining a wall with high mechanical resistance characteristics.

    [0012] Another object of the invention is to provide a disposable formwork for the construction of walls, that allows the time required for obtaining the finished wall to be reduced.

    [0013] Therefore, the specific subject matter of the present invention is a disposable formwork for the construction of a wall, said formwork being of the type comprising a first panel and a second panel, said spacer element being configured for mutually coupling said first panel and said second panel arranged at a certain distance one from the other, said spacer element comprising: a first connecting portion configured to be coupled, in use, to said first panel; a second connecting portion opposite said first connecting portion and configured to be coupled, in use, to said second panel; and at least one pipe provided with at least one lateral opening communicating, in use, with the outside of said formwork; in said at least one pipe there being afforded at least one through hole communicating, in use, with an inner part of said formwork in such a way as to allow the flow of air from the outside of the formwork toward said inside part and the outflow of liquids from said inside part toward the outside of the formwork.

    [0014] Advantageously, said first connecting portion may comprise a first connecting means and said second connecting portion may comprise a second connecting means.

    [0015] Furthermore, said first connecting means and said second connecting means may be formed in a single piece with said at least one pipe.

    [0016] Preferably, said at least one through hole in said at least one pipe may comprise at least one row of through holes arranged longitudinally to said at least one pipe.

    [0017] Furthermore, said at least one through hole may have a diameter less than or equal to 3 mm.

    [0018] Preferably, said at least one lateral opening may comprise at least a first lateral opening arranged at said first connecting portion, and at least a second lateral opening arranged at said second connecting portion.

    [0019] Said at least one pipe may have a first internal slope toward said at least one first lateral opening and a second internal slope toward said at least one second lateral opening.

    [0020] Said at least one pipe may comprise three pipes mutually spaced apart and substantially parallel.

    [0021] Said spacer clement may comprise a lower engagement portion configured to be coupled, in use, to a lower alignment element.

    [0022] Furthermore, said spacer element may comprise an upper engagement portion configured to be coupled, in use, to an upper alignment element.

    [0023] Advantageously, in an intermediate zone of said at least one pipe, an interruption element may be provided to prevent the heal bridge phenomenon.

    [0024] According to the invention, in at least one panel of said two panels at least one opening is afforded, communicating with said at least one lateral opening of said at least one pipe.

    [0025] Therefore, it is the subject of this invention a disposable formwork for the construction of a wall according to the characterizing portion of annexed independent Claim 1.

    [0026] Document US 6 159 399 A [Schmid], having the title: "PROCEDURE FOR THE ERECTION OF CONCRETE WALLS USING BRACED BOARDINGS AND DEVICE TO CARRY OUT THE SAME" discloses a spreader pipe for use in erecting concrete walls, which spreader pipe may contain at least one hole in its wall. But it does not suggest the use of a spacer and a formwork wherein the pipe presents a lateral opening which communicates with the outside of the formwork and through a hole which communicates with an inner part of the formwork, so as to allow the flow of air from the outside of the formwork toward the inner part and the outflow of liquids from the inner part toward the outside of the formwork.

    [0027] Characteristics and advantages will become more apparent in the following description of a preferred but not exclusive embodiment shown by way of a nonlimiting example in the appended drawings, wherein:
    • figure 1 shows a disposable formwork incorporating a plurality of spacer elements, according to the present invention;
    • figure 2 is an axonometric view of a spacer element;
    • figure 3 is a lateral view of the spacer element according to figure 2;
    • figure 4 is a plan view from above of the spacer element according to figures 2 and 3;
    • figure 5 is a perspective view of another spacer element;
    • figure 6 is a lateral view of the spacer element shown in figure 5;
    • figure 7 is a plan view from above of the spacer element according to figures 5 and 6;
    • figure 8 is a detailed view of a first side of a panel of the disposable formwork shown in figure 1; and
    • figure 9 is a detailed view of a second side of a panel of the disposable formwork illustrated in figure 1.


    [0028] With reference to the enclosed figures, 1 indicates a modular disposable formwork for the construction of walls of buildings, specifically both exterior enclosure walls and interior partition walls.

    [0029] The formwork 1 comprises a first panel 2 and a second panel 3 of a substantially square or rectangular shape, and a plurality of spacer elements 4 arranged between said first panel 2 and second panel 3.

    [0030] The spacer elements 4, like the first panel 2 and the second panel 3, are preferably made of plastic materials.

    [0031] The first panel 2 and the second panel 3 each have a first side 5a and a second side 5b opposite to said first side 5a.

    [0032] In the assembled configuration of the formwork 1 shown in figure 1, the first panel 2 and the second panel 3 are opposing one another, i.e. with the respective first sides 5a mutually facing one another.

    [0033] On the first side 5a of each of said panels 2, 3 a plurality of guides 6 is provided, arranged on various vertically aligned rows, which perform the function of enabling the connection with the aforementioned plurality of spacer elements 4.

    [0034] Each guide 6 is formed by two L-shaped tabs 6a, 6b, arranged opposing one another so as to form an empty space 7 between them, open at the top through a first horizontal slit 8, at the bottom through a second horizontal slit 9, on the first side 5a through a third vertical slit 10 and on the second side 5b with a fourth opening 11.

    [0035] Each of said first panel 2 and second panel 3 further has a series of openings 6' for allowing the ventilation of the inside part of the formwork 1 and the outflow of liquids from the latter after the concrete has been cast in the formwork 1 itself, as better specified below.

    [0036] On the first panel 2 and on the second panel 3, ventilation openings 12 are also afforded, for allowing the ventilation of the cement-based mortar after it has been cast in the formwork 1.

    [0037] On the perimetral edges of each of said first panel 2 and second panel 3, there are portions conformed like connecting elements to allow connection with other panels of the type described above, both in the vertical and horizontal direction.

    [0038] Now, with reference to figure 1, the spacer elements 4 are of the same number as the vertical rows of guides 6 provided on each panel.

    [0039] In the specific case shown in the enclosed figures, there are three spacer elements 4.

    [0040] As mentioned above, the spacer elements 4 are interposed between the first panel 2 and the second panel 3.

    [0041] Each spacer element 4 is formed by a frame 13 comprising three mutually parallel cross members, i.e. an upper cross member 14, a lower cross member 15 and a central cross member 16 arranged in a substantially equidistant position with respect to the upper cross member 14 and the lower cross member 15.

    [0042] The upper cross member 14, the lower cross member 15 and the central cross member 16 are each formed by a pipe defining respectively a first lateral opening 14', 15', 16' and a second lateral opening 14", 15", 16", for the ventilation of the inner part of the formwork 1 and the outflow of liquids, and in which four respective longitudinal rows of through holes 14a, 14b, 14c, 14d, 15a, 15b, 15c, 15d, 16a, 16b, 16c, 16d are afforded.

    [0043] In particular, the first lateral openings 14', 15', 16' provided on one side of the spacer element 4, like the second lateral openings 14", 15", 16" provided on the other side, are arranged so that, in the assembled configuration of the formwork 1, they are each facing towards the openings 6'.

    [0044] Each hole of the aforementioned longitudinal rows of through holes 14a, 14b, 14c, 14d, 15a, 15b, 15c, 15d, 16a, 16b, 16c, 16d preferably has a diameter less than or equal to 3 mm.

    [0045] The inside part of the upper cross member 14, the lower cross member 15 and the central cross member 16 are not perfectly straight; they each have two opposing slopes that originate from the respective central zone, lowering towards the relative ends, to facilitate the outflow of liquids towards the outside, as better specified below.

    [0046] The frame 13 further comprises a set of three upper uprights comprising a first lateral upper upright 17a, a second lateral upper upright 17b and a central upper upright 17c, which extend perpendicularly from the central cross member 16 to the upper cross member 14.

    [0047] The frame 13 also comprises a set of three lower uprights formed by a first lateral lower upright 18a, a second lateral lower upright 18b and a central lower upright 18c, which extend perpendicularly from the central cross member 16 to the lower cross member 15.

    [0048] In particular, the first lateral upper upright 17a, the second lateral upper upright 17b and the central upper upright 17c are respectively aligned with the first lateral lower upright 18a, the second lateral lower upright 18b and the central lower upright 18c, so as to form, together with the upper cross member 14, the lower cross member 15 and the central cross member 16, four empty spaces 19, 20, 21, 22 of a substantially identical shape.

    [0049] On a first lateral edge of the spacer element 4, at the first lateral upper upright 17a and at the first lateral lower upright 18a, a first flat element 23 is provided, arranged in the most external position with respect to the first lateral openings 14', 15', 16' of the pipes of the cross members 14, 15, 16, so that respective slits are formed between the cross members 14,15,16 and the first flat element 23.

    [0050] Furthermore, in the first flat element 23 three first openings 24a, 24b, 24c are afforded, respectively arranged substantially opposite the first lateral openings 14', 15', 16' of the pipes of the cross members 14, 15, 16.

    [0051] Likewise, on a second lateral edge of the spacer element 4, opposite the aforementioned first lateral edge, there is a second flat element 25 arranged parallel to the first flat element 23 and in a more external position with respect to the second lateral openings 14", 15", 16" of the pipes of the cross members 14, 15, 16, so that, also in this case, respective slits are formed between the cross members 14, 15, 16 and the second flat element 25.

    [0052] In the second flat element 25 three second openings 26a, 26b, 26c are also provided, respectively positioned substantially opposite the second lateral openings 14", 15", 16" of the pipes of the cross members 14, 15, 16.

    [0053] In the lower part of the lower cross member 15 a lower engagement portion 27 is provided, from whose lower edge two lower openings 28', 28" extend, of a substantially rectangular shape.

    [0054] Likewise, in the upper part of the upper cross member 14 an upper engagement portion 29 is provided, from whose upper edge two upper openings 30', 30" extend, of a substantially rectangular shape.

    [0055] The lower openings 28', 28" and the upper openings 30', 30" are adapted to engage with respective complementary elements (not shown in the enclosed claims) arranged longitudinally with respect to the formwork 1, for the purpose of performing the alignment in the space of all the spacer elements 4.

    [0056] In each of the empty spaces 19, 20, 21, 22 a curved appendage 31, 32, 33, 34 is provided, which extends, respectively, from said first lateral upper upright 17a, second lateral upper upright 17b, first lateral lower upright 18a and second lateral lower upright 18b, towards the central cross member 16.

    [0057] Such curved appendages 31, 32, 33, 34 act as guides for the passage of pipes and/or cables for installations of any kind, the latter being able to pass into the formwork 1 in the spaces defined by them, before the cement-based mortar is cast.

    [0058] Each spacer element 4 is formed in a single piece.

    [0059] For the assembly of the formwork 1, the spacer elements 4 must be coupled to the corresponding vertical rows of guides 6 provided on the first panel 2 and on the second panel 3, by inserting the first flat element 23 into the housings 7 identified by the guides 6 of one of said panels, and making the second flat element 25 pass into the housings 7 identified by the guides 6 of the other panel, so that said panels 2, 3 are arranged parallel to one another and opposing one another.

    [0060] Once the entire structure of formworks 1 has been built for the construction of the wall, by coupling them appropriately in the horizontal and/or vertical direction, the cement-based mortar can be cast in the formworks 1 which comprise such structure, and then the surface finishing works on the wall being built can be performed.

    [0061] At this point, it is necessary to wait for the cement-based mortar used for the finished wall to set completely.

    [0062] Now, with specific reference to figures 5, 6 and 7, number 4' indicates a further spacer element.

    [0063] Such spacer element 4' has an identical structure to that of the above-described spacer element 4 except that the pipes of the three cross members have a respective interruption 35', 36', 37' in the relative central part so that each pipe is, in fact, configured as a pair of pipes 38', 39'; 40', 41'; 42', 43' separate from one another and closed in the respective face facing towards the inside of the spacer element 4', so as not to be communicating with one another.

    [0064] The provision of such interruptions 35', 36', 37' allows the particularly unwanted phenomenon of heat bridges to be prevented, which would otherwise arise in the finished construction.

    [0065] Whereas, in relation to the methods for assembling the formwork 1 in the event of using the spacer elements 4' they remain the same as those indicated above with reference to the spacer elements 4.

    [0066] When using the formworks 1 described above for the construction of a wall, a double effect has surprisingly been found, i.e. a significant reduction in the setting times of the cement-based mortar and a net improvement in the mechanical and structural performance of the wall itself due to a more homogeneous and uniform setting process of the wall.

    [0067] Such double effect arises due to the provision of the above-described cross members 14, 15, 16 in each spacer element 4, which on one hand allow the liquid products of the cement-based water to flow out of the formwork 1 from the openings 14', 14", 15', 15", 16', 16" passing through the through holes 14a, 14b, 14c, 14d, 15a, 15b, 15c, 15d, 16a, 16b, 16c, 16d, and on the other hand allow the air in the external environment to reach the inside part of the formwork 1 passing into the pipes comprising the cross members 14, 15, 16, in order to promote the drying and therefore the setting of the cement-based mortar.

    [0068] The above is intended to provide an exemplificative and non-limitative description, therefore any construction variations are considered to fall within the scope of protection of the present technical solution as claimed below.


    Claims

    1. A disposable formwork (1) for the construction of a wall, said formwork (1) comprising a first panel (2), a second panel (3) and at least one spacer element (4, 4') arranged between said two panels (2, 3) in such a way as to couple said two panels (2, 3), said 5spacer element (4, 4') being configured to mutually couple to each other said first panel (2) and second panel (3) arranged at a certain distance one from the other, said spacer element (4, 4') comprising:

    - a first connecting portion (23) configured to be coupled, in use, to said first panel (2);

    - a second connecting portion (25) opposite to said first connecting portion (23) and configured to be coupled, in use, to said second panel (3); and

    - at least one pipe (14, 15, 16) provided with at least one lateral opening (14', 14", 15', 15", 16', 16");

    in said at least one pipe (14, 15, 16) there being afforded at least one through 15 hole (14a, 14b, 14c, 14d; 15a, 15b, 15c, 15d; 16a, 16b, 16c, 16d) ;
    whereby in at least one panel of said two panels (2, 3) at least one opening (6') is afforded communicating with said at least one lateral opening (14', 14", 15', 15", 16', 16") of said at least one pipe (14,15,16);
    characterised in that, in use, said at least one lateral opening (14', 14", 15', 15", 16', 16") communicates with the outside of said formwork (1); and
    said at least one pipe (14, 15, 16) communicates with an inner part of said formwork (1) in such a way as to allow the flow of air from the outside of the formwork (1) toward said inside part and the outflow of liquids from said inside part toward the outside of the formwork (1).
     


    Ansprüche

    1. Eine Einwegschalung (1) zum Herstellen einer Wand, wobei diese Schalung (1) eine erste Platte (2), eine zweite Platte (3)
    und mindestens ein Abstandhalterelement (4, 4') umfasst, so zwischen den beiden Platten (2, 3) angeordnet, dass die beiden Platten (2, 3) miteinander verbunden werden, wobei das genannte Abstandhalterelement (4, 4'), das konfiguriert ist, um die erste Platte (2) und die zweite Platte (3), die in einem bestimmten Abstand voneinander angeordnet sind, miteinander zu verbinden, wobei das Abstandhalterelement (4, 4') Folgendes umfasst:

    - einen ersten Verbindungsabschnitt (23), konfiguriert für die Verbindung im Gebrauch mit der ersten Platte (2);

    - einen zweiten Verbindungsabschnitt (25) gegenüber dem ersten Verbindungsabschnitt (23), konfiguriert für die Verbindung im Gebrauch mit der zweiten Platte (3); und

    - mindestens ein Rohr (14, 15, 16), versehen mit mindestens einer seitlichen Öffnung (14', 14", 15', 15", 16', 16") ;

    in dem genannten mindestens einem Rohr (14, 15, 16), mit mindestens einem Durchgangsloch (14a, 14b, 14c, 14d; 15a, 15b, 15c, 15d; 16a, 16b, 16c, 16d) ;
    wobei in mindestens einer der beiden Platten (2, 3) mindestens eine Öffnung (6') vorgesehen ist, die mit der mindestens einen seitlichen Öffnung (14', 14", 15', 15', 15", 16', 16', 16") des mindestens einen Rohres (14, 15, 16) verbunden ist;
    dadurch gekennzeichnet, dass im Gebrauch die mindestens eine seitliche Öffnung (14', 14", 15',15", 16', 16', 16") mit der Außenseite der Schalung (1) in kommuniziert; und das genannte mindestens eine Rohr (14, 15, 16)
    mit einem inneren Teil der Schalung (1) so verbunden ist, dass der Luftstrom von der Außenseite der Schalung (1) zum inneren Teil und der Abfluss von Flüssigkeiten vom inneren Teil zum äußeren Teil der Schalung ermöglicht wird (1).
     


    Revendications

    1. Coffrage jetable (1) pour la construction d'un mur, ledit coffrage (1) comprenant un premier panneau (2), un deuxième panneau (3)
    et au moins un élément d'espacement (4, 4') disposé entre lesdits deux panneaux (2, 3) de manière à coupler lesdits deux panneaux (2, 3), ledit élément d'espacement (4, 4') étant configuré pour coupler ensemble ledit premier panneau (2) et ledit deuxième panneau (3) disposés à une certaine distance l'un de l'autre, ledit élément d'espacement (4, 4') comprenant :

    - une première partie de raccordement (23) configurée pour être couplée, durant l'utilisation, avec ledit premier panneau (2) ;

    - une seconde partie de raccordement (25) opposée à ladite première partie de raccordement (23) et configurée pour être couplée, durant l'utilisation, avec ledit second panneau (3) ; et

    - au moins un tuyau (14, 15, 16) pourvu d'au moins une ouverture latérale (14', 14", 15', 15", 16' 16") ;

    dans ledit tuyau (14, 15, 16), il y a au moins un trou traversant (14a, 14b, 14c, 14d; 15a, 15b, 15c, 15d; 16a, 16b, 16c, 16d) ;
    dans lequel au moins un panneau desdits deux panneaux (2, 3) avec au moins une ouverture (6') communique avec l'une desdites ouvertures latérales (14', 14", 15', 15", 16', 16") de l'un desdits tuyaux (14,15,16);
    caractérisé par le fait que, durant l'utilisation, l'une desdites ouvertures latérales (14', 14", 15',15", 16', 16") communique avec l'extérieur dudit coffrage (1) ; et ledit tuyau (14, 15, 16) communique
    avec une partie interne dudit coffrage (1) de manière à permettre l'écoulement de l'air depuis l'extérieur du coffrage (1) vers ladite partie interne et l'écoulement des liquides de ladite partie interne vers l'extérieur du coffrage(1).
     




    Drawing
























    REFERENCES CITED IN THE DESCRIPTION



    This list of references cited by the applicant is for the reader's convenience only. It does not form part of the European patent document. Even though great care has been taken in compiling the references, errors or omissions cannot be excluded and the EPO disclaims all liability in this regard.

    Patent documents cited in the description