[0001] The invention presented herewith is related to a modular formwork for the construction
of walls and/or pillars in concrete.
[0002] Today, modular structures are known that are suitable to create a formwork for the
construction of walls and pillars, whereby these are generally made of metal and comprise
a plurality of flat wooden boards the surface of which is placed on the side in contact
with the concrete.
[0003] Such structures constitute a variety of disadvantages which include their unwieldiness
when putting them to use due to the notable weight of the elements of the structure
and the modular accessories needed to assemble the same; the short life duration of
the modular elements resulting from the use of wooden boards which, in spite of their
being coated with impermeable resin, are subject to rotting; the increased costs and
the high degree of complexity of the structure itself due, among other things, to
the considerable number of accessories needed in putting it to use, above all in the
case of corner wall construction or pillars.
[0004] Modular formworks are also known which, being made of plastic material, such as,
for example, thermo-formed polymers, partially resolve the disadvantages shown by
modular structures made of metal and wood. The panels made of plastic material prove,
in fact, to be particularly manageable and are scarcely subject to wear and tear.
[0005] Such known modular structures made of thermoplastic material, however, still involve
a high degree of complexity in putting them to use, since they require a large number
of accessories for the attachment of adjoining elements, in particular, for the fixing
of elements arranged perpendicularly to each other, so that the formwork constructed
in this way is capable of withstanding the forces of pressure exerted by the concrete.
[0006] The object of the invention presented here is to eliminate the above mentioned inconveniences
in known types of modular formworks for the construction of walls, contriving to devise
a modular formwork for the construction of walls and/or pillars which offers the advantage
of being installable in a simple and rapid manner.
[0007] In the scope of this object, one of the aims of the invention presented here is to
furnish a modular formwork for the construction of walls and/or pillars which is suitable
for the construction of linear walls, T-shaped walls. L-shaped walls or pillars without
the need for specially designed modular elements. Not least, an aim of the present
invention is to devise a modular formwork for the construction of walls and/or pillars
which, exploiting the economy of scale, is feasible at competitive costs.
[0008] This object, quite apart from other aims to be seen more clearly in the following,
is achieved by the formwork for the construction of walls and/or pillars according
to the invention, which comprises a plurality of modular elements having a smooth
surface on the inside of the formwork and on the outside a surface comprising reinforcing
ribs, the modular elements being joined together by means of clamping devices, characterized
in that the modular elements comprise complementary, lateral, segments for connecting
one to another, capable of effecting the firm connection of two laterally adjoining
elements by means of the clamping devices, and, moreover, in that the modular elements
comprise protrusions above and below, enabling a firm connection of two elements adjoining
vertically by means of clamping devices.
[0009] Preferably, the connecting segments are designed in the form of openings, hooking
pieces and segments inclined in relation to the base of the modular element or as
complementary ribs.
Advantageously, the protrusions are shaped in the form of a "U".
[0010] Further characteristics and advantages of the invention will be seen largely from
the description of a preferable, but non exclusive, embodiment of the modular formwork
for the construction of walls and/or pillars, which is illustrated by, but not limited
to, the respective example drawings, in which
Figure 1 shows a perspective view of a modular element in an first embodiment of the
formwork according to the invention;
Figure 2 is a side-view of the modular element shown in Fig. 1;
Figure 3 is an external front view of the modular element shown in Fig. 1;
Figure 4 is a perspective view of a formwork constructed with a number of individual
elements shown in Fig. 1;
Figures 5 and 6 are detailed drawings of the formwork shown in Fig. 4, enlarged to
show the manner in which the linking elements are used to connect the adjoining modular
elements;
Figure 7 is a perspective view of two adjoining modular elements in a second embodiment
of the formwork according to the invention;
Figure 8 is a perspective view of a formwork constructed with the modular elements
of figure 7;
Figure 9 is a view from above of a basic element of a formwork according to the invention;
Figure 10 is a view from above of a base of the formwork according to the invention;
Figure 11 is a perspective view of a formwork constructed with the elements of Fig.
7, placed on the corresponding base;
Figure 12 is a detailed drawing of the formwork shown in Fig. 8, which illustrates
the hooking together of the connecting links for sealing.
[0011] As illustrated diagrammatically in the drawings, the formwork 10,110, according to
the invention, comprises a plurality of elements 1,101 in plastic material, for example
stamped and injection moulded, substantially in quadrilateral shape, which comprise
on the outside, in relation to the formwork, reinforcing ribs 2,102 and which, on
the inside of the formwork, constitute a smooth surface.
[0012] The said modular elements 1,101 comprise lateral segments 3,4,103,104,105 suitable
for the firm connection between two elements 1.101 adjoining laterally.
[0013] In an first embodiment, the segments for the lateral connection are effected as complementary
ribs 3, 4 between them, more protruding than the reinforcement ribs 2.
The ribs for the connection 3 are on one side where they form a plurality of square
structures 5 in relief which, in turn, constitute an aperture 6 on their upper or
lower facet respectively.
On the other side of the modular element 1 are ribs 4, inclined in relation to the
base of the element 1 and terminated, at their most protruding point, by a panel section
7 parallel to the base of the element 1.
Said ribs 4 protrude in such a manner that when two elements are placed laterally
side by side, the panel sections 7 cover from above a part of the plurality of square
structures 5 of the adjoining element 1.
[0014] Moreover, the modular elements 1,101 comprise, on their upper and lower sides, protrusions
8,9,108,109 shaped in the form of a "U" substantially placed in the centre of the
upper and lower sides. In particular, the U-shaped protrusions 8,108 on the lower
side comprise two, semi-circular indentations 11,111.
[0015] To complete the fixing, the adjoining modular elements 1,101 are attached by means
of linking elements 20, for example flanged wing-nut-type clamps, which are generally
made of fibre-glass reinforced plastic material. These linking elements 20 comprise
a body 21, which can be substantially assembled in the form of a "T", whereby the
shaft of the "T" comprises a threaded section for the application of a flanged plastic
wing-nut 22.
[0016] Generally, to position or insert the fastener, the short side of the "T" is hooked
into one of the modular elements 1,101, while the flanged plastic wing-nut 22 is placed
in a position where it can connect the suitably shaped opposite part of the other
modular element 1,101, which is designed to receive and firmly arrest the flanged
plastic wing-nut 22.
[0017] In the first embodiment illustrated, four linking elements 20 are used to connect
two horizontally adjoining modular elements 1 and one single fastener for the vertical
connection of two adjoining modular elements 1.
In particular, for the horizontal connection, the short side of the T-shaped body
is inserted into the apertures 6 located on the upper and lower facets of two previously
described square structures in relief 5, of a first modular element 1, while the flanged
plastic wing-nut of the fastener 22 is placed between two corresponding panel sections
7 protruding further out from the complementary ribs 4 of the second modular element
1.
[0018] The particular configuration, especially of the lateral ribs 3,4 of the modular elements
1, permits the horizontal connection, as described above, which can be effected either
in the case of a linear connection or in the case of an orthogonal, external or internal
corner connection. In effect, the square structure in relief 5 offers a support for
the panel section 7 of the complementary ribs 4, irrespective of the manner in which
the positioning is effected in one of the three possible reciprocal positions of two
modular elements 1 (linear, orthogonal internal corner, orthogonal external corner).
[0019] Furthermore, the particular "T" configuration of the linking elements 20 enables
them to be positioned easily and conveniently according to existing requirements in
that the fastener can rotate in the apertures 6 around the rotation axis created by
the short side of the T-shaped body.
[0020] For connecting two, vertically adjoining modular elements 1, the short side of the
T-shaped body is carefully placed in the two semicircular indentations 11 of the lower
U-shaped protrusions 8 of the first modular element to be connected, while the flanged
plastic wing-nut of the fastener 22 is locked against the corresponding upper U-shaped
protrusion 9 of the second modular element 1 to be connected.
[0021] In Figures 7 -12, a second embodiment is illustrated, in particular for the construction
of pillars, which differs simply in the construction of the horizontal connection
between two adjoining elements 1,101.
[0022] The elements 101 of the second embodiment, comprise one side of hooks 104 and complementary
apertures 103 for the hooks 104 and, on the other side, are terminated by protruding
sections 105 inclined at and angle of 45° in relation to the base of the element 101.
Also, as already explained in regard to the first embodiment, on the upper and lower
sides, U-shaped protrusions 108,109 are provided.
[0023] Whilst the connection of two vertically adjoining modular elements 1 is effected
in an identical manner to that for the first embodiment, the horizontal connection
between the two elements 101 can be effected only for orthogonal, external corner
connections, i.e. exclusively for the construction of pillars.
Such connections are effected from one side for securing the hooks 104 in the apertures
103, while on the other side, being analogous to the first embodiment by means of
linking elements 20.
In order to position the hooks 104 of an element 101 so that they correspond with
the adjoining element, it is sufficient to rotate the first element 101 to an angle
of 180° in relation to the other.
[0024] The assembly of the formwork in accordance with the described embodiment is effected
as follows:
In accordance with the particular construction requirements, the initial assembly
of a base 130 for the formwork may be carried out. Examples of the respective base
elements 131 are shown in Figures 9 and 10 for the second embodiment. The base 130,
thus constructed, is anchored to the ground by nails using the holes 132 provided
for this purpose.
[0025] The elements 1,101 necessary to form the first layer of the formwork are successively
connected to one another horizontally by linking elements 20. The first layer of elements
1,101 are then fixed to the base 130 using the vertical connection procedure described
above.
[0026] In a similar manner, the elements 1,101 are connected together horizontally to form
the successive layers which are then linked together vertically. The total number
of layers that will build up the finished formwork is variable and depends on the
height of the wall and/or pillar to be constructed.
[0027] In the case of constructing pillars by the second mode of constructing the formwork
it is absolutely necessary to provide support by means of rods 140, anchored to the
ground by nails. These rods 140 are fitted with a threaded metal ring 141 at their
upper end, which ideally, by turning the ring, enables the adjustment of the length
of the rod 140.
[0028] In practice, using a modular formwork for the construction of walls and/or pillars
according to the invention, it is possible to complete any predetermined object for
whatever purpose by a simple assembly, solely applying modular elements and linking
elements as described above. The particular structure of the modular elements also
makes it possible, without the aid of special accessories, to clamp together reciprocal
modular elements either in a linear or orthogonal configuration. As a result, it is
possible to construct a modular formwork without the need for additional elements,
for the construction of walls and or pillars, whether as linear walls, T-shaped walls,
L-shaped walls or pillars.
[0029] Not least, it is possible to effect construction work at competitive costs in that
the necessity to use only one single process of assembly for the construction of a
modular formwork for the construction of walls and/or pillars according to the invention
also makes it possible to exploit the advantages ensuing from the effects of the economy
of scale.
[0030] The invention, conceived in this way, is predisposed to numerous forms of modification
and variants, all within the scope of the inventive concept. Thus, for example, the
screw-type linking elements can be substituted by any other means of fastening which
enables the connection of two adjoining modular elements.
Moreover, all of the details can be substituted by other elements and materials used,
not to mention the dimensions, which can be freely determined in accordance with any
requirements.
1. Formwork for the construction of walls and/or pillars comprising a plurality of modular
elements (1,101) which form on the inside of the formwork (10,110) a smooth surface
and on the outside a surface comprise reinforcing ribs (2,102), said modular elements
being connected together by means of linking elements 20, characterized in that said modular elements (1,101) comprise laterally arranged connecting sections (3,4,103,104,105)
serving to effect a firm connection between the complementary sections of two laterally
adjoining elements (1,101) by means of said linking elements (20), said modular elements
(1) also comprising upper and lower protrusions (8.9,108,109) serving to effect the
firm connection of two elements (1,101) adjoining vertically by means of said linking
elements (20).
2. Formwork for the construction of walls and/or pillars according to Claim 1, characterized in that said connecting sections are designed in the form of apertures (103), hooks (104)
and inclined sections (105) in relation to the base of said modular elements (1).
3. Formwork for the construction of walls and/or pillars according to Claim 1, characterized in that said element sections are designed in the form of complementary ribs (3,4).
4. Formwork for the construction of walls and/or pillars according to Claim 3 characterized in that said complementary ribs comprise, on one side, a plurality of square structures in
relief (5).
5. Formwork for the construction of walls and/or pillars according to Claims 3 or 4 characterized in that said complementary ribs (3,4) comprise on the other side modular elements (1) ribs
(4) inclined in relation to the base of said modular elements (1), said ribs (4) terminating
at the most protruding point of an element section (7) parallel to the base of said
element (1).
6. Formwork for the construction of walls and/or pillars according to Claims 3-5, characterized in that said square structures (5) in relief comprise in their upper and lower facets respectively
an apperture (6).
7. Formwork for the construction of walls and/or pillars according to Claims 3-6, characterized in that said inclined ribs (4), meet a protrusion in such a manner that when two modular
elements (1) are placed laterally side by side, said element sections (7) cover from
above a part of said plurality of square structures (5) of the adjoining element (1).
8. Formwork for the construction of walls and/or pillars according to one of the previous
Claims, characterized in that said protrusions (8, 9,108,109) are shaped in the form of a "U".
9. Formwork for the construction of walls and/or pillars according to one of the previous
claims, characterized in that said protrusions (8,108) located on the lower side comprise two, semicircular indentations
(11,111).
10. Formwork for the construction of walls and/or pillars according to one of the previous
claims, characterized in that said connecting means (20) are screw-type linking elements (20).
11. Formwork for the construction of walls and/or pillars according to Claim 10, characterized in that said screw-type linking elements (20) comprise a body (21) which can be assembled
substantially in the shape of a "T", whereby the shaft of the "T" comprises a threaded
section onto which is screwed a clamping nut (22).
12. Formwork for the construction of walls and/or pillars according to Claim 11, characterized in that the short side of said body (21) shaped in the form of a "T" is designed so as to
be able to be inserted into said apertures (6).
13. Formwork for the construction of walls and/or pillars according to Claim 8, characterized in that the short side of said body (21) shaped in the form of a "T" is designed so as to
be able to be lodged in said two semicircular indentations (11,111).
14. Formwork for the construction of walls and/or pillars according to one of the previous
claims, characterized in that the assembled modular elements (1,101) are fixed by means of linking elements (20)
to a base (130), anchored to the ground.
15. Formwork for the construction of walls and/or pillars according to Claim 14, characterized in that said base (130) comprises apertures (132) for anchoring to the ground by means of
nails.
16. Formwork for the construction of walls and/or pillars according to any of the claims
2 and 8 to 15, characterized in that it comprises a plurality of supporting rods (140) with metal adjustment rings (141)
for maintaining an upright position.