Patent Application
20130284883
This invention pertains to a variable-geometry spacing connector used, in particular, to assemble formworks for making concrete cast monolith separators, as well as to a modular formwork system including such connector.
Notedly, a formwork is a structure used in the building and construction trade to build the reinforced concrete works. It provides a casing into which the concrete in the liquid state is cast, after the reinforcement irons have been properly positioned, where the concrete stays until the completion of the setting process and after the cast has, once the hardening phase has started, achieved such mechanical strength as to guarantee the absorption of the stress which the structure has to withstand soon after the formwork itself has been taken apart.
Formworks can be made of several materials; in particular, formworks are currently available, which are made up of polystyrene foam panels made by means of the technique generally referred to as Insulated Concrete Form (ICF), as well as of their respective spacing connectors, which are disposable items needed for the assembling and internal blocking of the various aforesaid panels making up the shuttering mould and/or formwork of a reinforced concrete wall: as a rule, the existing spacing connectors may be both separate, pre-stamped metal elements or plastic elements (i.e. PVC or PP) and elements stamped jointly with the panels themselves. One example of such spacing connectors is described in WO0058577.
Yet, the existing spacing connectors and their respective existing formwork systems still pose a few problems. In fact, the formwork systems in which the panels are stamped jointly with the spacing connectors prove to be quite inefficient in terms of transport, since they feature a very high overall volume generated by geometric shapes branching off to a large extent and, yet, made up mostly of gaps.
To remedy this problem, formwork systems have been proposed for building walls only, which are made up of polystyrene foam panels and separate spacing connectors that will make it possible to achieve smaller overall dimensions (after they are disassembled) and also minimize the transportation and handling costs, despite the formworks themselves feature well-known hollows, which are divided into five classes, starting from 10-15-20-25-30 cm; obviously, the additional reinforced concrete will be cast into such hollows.
All of the “disposable” formwork systems featuring polystyrene foam panels, known as Insulated Concrete Form (or ICF), supplied by American manufacturers also pose transpiration problems, which may lead to building reinforced concrete structures that will, especially in case of civil buildings, give rise to the well-known causes of SBS (Sick Building Syndrome).
Furthermore, the formwork systems featuring polystyrene foam panels (ICF) still pose sound-proofing problems, due to their being unable to adequately break the noise off.
Moreover, the known spacing connectors placed in “disposable” formwork built by applying the ICF method feature standard lengths starting from 10 cm and reaching, by multiples of five, a maximum length of 30 cm. Such a maximum length is determined by the poor structural strength of such connectors: this will make it mandatory, in the event that the width between the two panels mutually facing each other and making up the ICF formwork has to be greater than 30 cm, to join several connectors to one another in series, in a telescopic fashion, by means of suitable “junction bridles”.
Furthermore, the known spacing connectors placed in the “disposable” formworks built by applying the ICF method may guarantee the positioning, despite not being fully constrained, of reinforcement irons in the horizontal direction only by steps of 30 cm—they will allow no constrained vertical positioning of such irons to such an extent that they will not guarantee homogeneous bar covering, as laid down by the international technical standards in order to obtain masonry complying with the service life requirements and the fire protection regulations.
Thus, the aim of this invention is to solve the above-mentioned problems relative to the older method, by providing a spacing connector used, in particular, for assembling transpiring, thermal-acoustic “disposable” formworks, equipped with at least one transpiration duct that will make it possible to facilitate transpiration between the inner panel plus the structural concrete separator and the outer panel making up such transpiring, thermal-acoustic “disposable” formwork.
One further aim of this invention is to provide a spacing connector featuring such a structural strength that will allow such spacing connector to be manufactured and used at least at a length of 150.00 cm, to be obtained, for instance, by measurement multiples of 2.50 cm and submultiples of 1.25 cm, indeed with no constraint at all on the length of such connectors.
One further aim of this invention is to provide a Spacing connector that will allow fully constrained positioning of reinforcement irons both in the horizontal direction and the vertical direction, in such a manner (if possible) as to create a fully reticular wide reinforcement with no measurement constraints for such grid.
One further aim of this invention is to provide a system relative to a transpiring, thermo-acoustic “disposable” formwork, including polystyrene foam panels and spacing connectors, each of them equipped with at least one transpiration duct, such that they will form a homogeneous transpiration grid inside such formwork between the inside and outside of said panels.
Moreover, one further aim of this invention is to provide a system relative to a transpiring, thermo-acoustic “disposable” formwork, preferably including extruded polystyrene and/or polystyrene foam panels as well as spacing connectors, each of them equipped with at least one transpiration duct, such that it will allow the overlapping connection of several such panels (even made of different materials) to achieve better sound proofing of the transpiring, thermo-acoustic “disposable” formwork itself.
The above and the other aims and advantages of the invention, as, detailed in the description hereafter, will be obtained by making use of a variable-geometry spacing connector to be used with transpiring, thermo-acoustic “disposable” formworks, such spacing connector being embodied in the description under claim 1.
Moreover, the above and the other aims and advantages of the invention, as detailed in the description hereafter, will be obtained by making use of a formwork system featuring a modular design of all of its components and/or elements, such modular formwork system being embodied in the description under claim 13.
Preferred embodiment designs and original variants of this invention will be the object of the relevant claims.
It is obvious that a number of variants and modifications can be made to the described items (e.g. variants and modifications concerning the shape and dimensions, as well as the arrangements and the parts performing equivalent functions) without departing from the scope of protection of the invention, as referred to in the enclosed claims.
This invention will be best described by a few preferred embodiments, which will be provided by way of example and with no limitation thereto, with reference to the enclosed drawings, where:
By referring to the Figures, you can notice that the variable-geometry spacing connector 1 referred to in the present invention is made up of at least one crosspiece 3, such crosspiece 3 being connected, at the two opposite ends of its, with at least one respective connection portion 5 suited to make a connection with at least one panel 10 of a transpiring, thermo-acoustic “disposable” formwork 11.
Productively, spacing connector 1 referred to in the present invention will also include at least one transpiration duct featuring two respective end openings 15, each of them leading to a respective connection portion 5. Such transpiration duct is therefore suited to get the panels 10 (among which the spacing connector 1 referred to in this invention is placed) connected and also allow transpiration among such panels 10, in particular from the inner panel towards the outer panel due to the pressure difference obviously found between the aforesaid end openings 15. In addition, the transpiration duct may be equipped with at least one check device 47 (such as, for instance, a check valve) suited to act in favour of the above-mentioned pressure difference and also enhance the efficiency of the process of transpiration and discharge of saturated steam by means of spacing connector 1 referred to in the present invention.
As you can notice in
In addition, as you can notice in
As an alternative, as you can notice in
Furthermore, in order to allow reinforcement irons 13 to be positioned accurately, the connection portions 5 may be equipped with at least one respective removable fin 47: in particular, the removable fin 47 can be taken off the connection portion 5 by being broken along a score line 48 so as to alter the height of positioning of spacing connector 1 along the panel 10 of the transpiring, thermo-acoustic “disposable” formwork 11 once said lock-in profile 5 has been inserted into the respective lock-in profile of the panel itself, and also allow spacing connector 1 to be positioned heightwise to a high degree of accuracy.
Obviously, depending on the width to be obtained between panels 10 of the transpiring, thermo-acoustic “disposable” formwork 11, several spacing connectors 1 as referred to in the present invention can, as shown in
Obviously, the connection portion 5 may be equipped with any one connecting means, be it a mechanical connection means or any one lock-in profile, such as, for instance, at least one dovetail profile 7, which will make it possible to connect the spacing connector 1 referred to in the present invention with the corresponding lock-in profile 27 of any one panel 10, also known in the relevant engineering field without, therefore, departing from the scope of protection of this invention. In particular, please note that also the amount and the arrangements of dovetail profiles 7 can be most varied: in fact, by way of example only, the Figures show a number of alternative examples, with no limitation thereto, in which the quantity, dimensions and forms of dovetail profiles 7 vary (for instance, one male item for connection portion 5 in spacing connector 1 of
In particular, crosspiece 3 may be equipped with at least one housing seat 9 suited to accommodate at least one reinforcement iron 13. Obviously, the quantity and the arrangement of such seats may be most varied without, therefore, departing from the scope of protection of this invention. In fact, still by way of example only, the Figures show a number of alternative examples, with no limitation thereto, in which the quantity and the arrangements of housing seats 9 vary. Such housing seats 9 should preferably be placed at a pitch of 2.5 cm with respect to one another, so that the reinforcement irons 13 can be arranged horizontally in accordance with said pitch. In addition, as you can notice in
It is also obvious that spacing connector 1 referred to in this invention can be made of any one materials suitable for the purpose—and, in particular, a plastic material such as polypropylene (also filled with talc) or other materials, with no limitation thereto. In addition, it is obvious, once again, that spacing connector 1 referred to in the present invention can be made both as one single piece in which all of its component parts are made of one single material, and in parts separate from one another and subsequently assembled, even made of different materials from one another, thus without departing from the scope of protection of this invention.
In addition, spacing connector 1 referred to in the present invention may be made up by at least two half-parts (1a and 1b) that may be made of different materials and can be connected with each other, for instance by means of suitable lock-in profiles 29 reinforced (if necessary) by a plastic bridle (not shown), either horizontally or vertically (as shown, by way of example, in
possible reversibility of the individual parts 1a and 1b;
smaller transportation overall dimensions;
simple installation of pipe 17 inside a special seat obtained along crosspiece 3.
Furthermore, the length of spacing connector 1 referred to in the present invention shall preferably be a multiple (by the centimeter) of 1.25: the preferred lengths of spacing connector 1 referred to in the present invention will therefore be, for instance, 1.25 cm, 2.50 cm, 3.75 cm, 5.00 cm, and so on. At least one metal core (not shown) can productively be fitted at least into crosspiece 3, such metal core being suited to further increase the tensile strength and the stiffness offered by spacing connector 1 referred to in the present invention. As an alternative or in addition, still in order to reinforce spacing connector 1 structurally, pipe 17 shall preferably be made of metal: the presence of the metal core and/or of metal pipe 17 will productively make it possible to make and use with the necessary structural reliability spacing connectors 1 (as referred to in the present invention) featuring a length of at least 150.00 cm, with no limitation thereto.
As you can notice in the alternative embodiment (shown in
Furthermore, this invention pertains to a dynamic construction system for making a modular, transpiring, thermo-acoustic “disposable” formwork 11 including panels made of any one material 10 as well as spacing connectors 1 like the ones described above: in particular—and by referring to the Figures—you can notice that the dynamic construction system referred to in the present invention includes at least two panels 10, preferably of the polyurethane and/or polyurethane foam type, which are connected with each other by placing said spacing connectors 1 in between. Thus, each panel 10 shall preferably be equipped with a plurality of lock-in profiles 27, each of them shall be coupled (if necessary) with a respective profile 23, such lock-in profiles 27 being suited to make it possible to insert the connecting means, and also, if necessary, of the additional lock-in profile 21 (as shown, by way of example, in
Please also note, by way of example only—and by referring to the example in FIG. 7—that the space placed in between the panels 10 facing the transpiring, thermo-acoustic “disposable” formwork 11 can be changed by merely placing two or several spacing connectors 1 referred to in the present invention in between such panels, for instance said panels being connected between the respective (and facing) connecting means by placing a corresponding connection profile 33 in between, the latter profile being properly shaped, for instance, to correspond with the dovetail profiles 7 (if any) found on the connection portions 5 of such spacing connectors 1 themselves.
In addition, as you can notice in
The modular construction system referred to in the present invention will therefore make it possible, by making use of spacing connectors 1 and of panels 10, to obtain the following advantages:
top modular design in the making of transpiring, thermo-acoustic “disposable” formworks 11 featuring any one form, and for building any one building structure, i.e. foundations in the most varied monolith masonry shapes and/or unidirectional and bi-directional lofts and unidirectional and bi-directional monolith slabs;
the making of a horizontal and vertical transpiration grid created by the cooperation between the transpiration ducts of spacing connectors 1 and the junction lines between panels 10;
the possibility of making a transpiring, thermo-acoustic “disposable” formwork 11 that will make it possible to cast a resulting non-monolith beam-network structure instead of making use of the formworks peculiar to the method known as the English term “flat-type ICF).
| Number | Date | Country | Kind |
|---|---|---|---|
| TO2011A000011 | Jan 2011 | IT | national |
| Filing Document | Filing Date | Country | Kind | 371c Date |
|---|---|---|---|---|
| PCT/IT12/00008 | 1/10/2012 | WO | 00 | 7/12/2013 |
