EP0329753A1

EP0329753A1 - Formwork shutter and profiled section for its implementation

Info

Publication number: EP0329753A1
Application number: EP88907710A
Authority: EP
Inventors: Pierre Salas
Original assignee: Individual
Current assignee: Individual
Priority date: 1987-09-07
Filing date: 1988-09-02
Publication date: 1989-08-30
Anticipated expiration: 2008-09-02
Also published as: WO1989002511A1; US5102092A; FR2620155B1; FR2620155A1; JPH02500924A; EP0329753B1; AU2322188A

Abstract

La présente invention concerne une banche de coffrage constituée d'une pluralité d'éléments assemblés. Certains au moins desdits éléments sont constitués chacun par un profilé (1), à base d'aluminium, présentant sur une première face une surface lisse coffrante (2) et comportant des ailettes longitudinales raidisseuses (3,4,5,6) orientées perpendiculairement à la surface coffrante (2) et délimitant latéralement entre elles des cavités (7,8,9) ouvertes sur une seconde face du profilé opposée à ladite première face. The present invention relates to a formwork form consisting of a plurality of assembled elements. Some at less of said elements each consist of a profile (1), based on aluminum, having on a first face a smooth formwork surface (2) and comprising stiffening longitudinal fins (3,4,5,6) oriented perpendicularly to the formwork surface (2) and laterally delimiting between them cavities (7,8,9) open on a second face of the profile opposite to said first face.

Abstract

The present invention relates to a formwork shutter comprised of a plurality of assembled elements. At least certain of said elements are each comprised of a profiled section (1), made with aluminium, presenting on a first face a smooth formwork surface (2) and comprising longitudinal stiffening wings (3, 4, 5, 6) which are oriented perpendicularly to the formwork surface (2) and delimiting sideways between each other cavities (7, 8, 9) open to a second face of the profiled section opposite to said first face. The present invention relates to a formwork shutter comprised of a plurality of assembled elements. At least certain of said elements are each comprised of a profiled section (1), made with aluminum, presenting on a first face a smooth formwork surface (2) and comprising longitudinal stiffening wings (3, 4, 5, 6) which are oriented perpendicularly to the formwork surface (2) and delimiting sideways between each other cavities (7, 8, 9) open to a second face of the profiled section opposite to said first face.

Description

FORMWORK BENCH AND PROFILE FOR ITS REALIZATION

The present invention relates to a profile constituting a concrete formwork form element comprising a smooth formwork surface in the formwork. The forms traditionally used in formwork are most often made of heavy materials such as metal or an external steel or aluminum frame receiving a plywood skin serving as a formwork surface. These products used are, in general, heavy, difficult to maneuver and have a limited lifespan. Their implementation requires significant lifting means given their weight and requires very special attention in their assembly. Such an implementation requires the use of expensive equipment as well as highly qualified labor.

The present invention aims to propose a set of tarpaulins constituted by assemblable elements representing a small mass, easily transportable, allowing ease of use by unskilled labor and avoiding having to call upon inconvenient lifting means. These forms of new design are obtained by the production of elements in the form of a very light and easy to handle aluminum alloy, the shape of these elements being studied to facilitate assembly of these elements and constituting a formwork surface. easily adjustable by both lateral and vertical combination of these formwork elements. The use of aluminum makes it possible to avoid all corrosion problems, hence the exceptional longevity of this product. The use of such a material therefore avoids having to use lifting means and allows simple packaging when such elements have to be transported, especially for distant public works.

The present invention therefore relates to a profile constituting an element of concrete formwork comprising a smooth formwork surface, characterized in that said profile, produced by extrusion of an aluminum alloy, comprises longitudinal stiffening fins, perpendicular to the formwork surface delimiting open cavities.

Advantageously, two fins each located at a lateral end of the shuttering face have a "C" section open towards the lateral exterior of the profile.

According to a first manufacturing method, an element of formwork at an external angle is produced by longitudinal central folding of the formwork surface.

According to a second manufacturing method, a formwork element with an internal angle is produced by longitudinal central folding of the formwork surface and cutting of two central fins.

According to a secondary characteristic of the invention, the. fins have longitudinal reinforcements each constituting a means for receiving a fixing acting on a connecting element between two sections.

The present invention also includes a set of forms for concrete formwork comprising a combination of profiles as previously described, characterized in that said elements of form are joined laterally by a connecting element engaging in the opening in "C" of a lateral fin of a first panel element and in the “C” opening of a lateral fin of a second element, said connecting element being blocked by members for fixing to said first and second form elements .

According to another secondary characteristic of this set of formwork, a “C” section receiving element is mounted on the horizontal edges of the formwork elements by fixing members cooperating with the reinforcements located on each fin. Advantageously, a connecting element of two vertically superposed panel elements cooperates, on the one hand with a first receiving element mounted on the upper edge of a first banchejet element, on the other hand with a second receiving element on

_ the upper edge of a second profile. ! j

According to a preferred mounting method, steel ribs constituting a stiffening part of the form are fixed transversely on the fins of each section element profile.

A particular embodiment of the invention will now be described in more detail which will make it better understand the essential characteristics and the advantages, it being understood however that this embodiment is chosen by way of example and that it is in no way limiting. Its description is illustrated by the appended drawings, in which:

- Figure 1 is a cross-sectional view of a profile constituting a formwork element; ^• - Figure 2 is a sectional view of an element constituting an external angle;

- Figure ^' 3 is a sectional view of an element constituting an interior angle;

- Figure 4 is a sectional view of elements attached sideways;

- Figure 5 is a front view of adjoining elements;

- Figure 6 is a perspective view of the superimposed coopé¬ ration of two elements; - Figure 7 is a view of the cooperation of connecting elements between two joined form elements;

- And Figure 8 is a side view of a formwork assembly using such elements.

Figure 1 shows in section a profile 1 constituting a concrete sheet element whose shape

REPLACEMENT SHEET particular allows easy assembly used to make the formwork of a wall in building techniques as shown in Figure 8. The assembly includes two forms 70, 71 whose formwork faces face each other. These two forms are positioned using rods 72 passing through the two surfaces and aiming to maintain a constant spacing between the two formwork surfaces of each formwork element.

We will now explain in detail the constitution of each part of the sheet element comprising sections assembled both laterally and vertically.

The profile shown in Figure 1 is made by extrusion from an aluminum alloy giving it a lightness which facilitates handling. The press used during the extrusion operation makes it possible to obtain a shape of profile whose characteristics and advantages will be described.

The profile has a flat formwork face 2 with a thickness of 2.5 mm. Perpendicular to this formwork surface there are longitudinal stiffening fins 3 _> 4, 5, 6. In a preferred embodiment, the width of the element will have a formwork surface of 20 cm. For such a width, the profile will be provided with four fins distributed in the form of two lateral fins 3 _" 6 at each end and two central fins 4, 5. The central fins 4, 5 have a section in the shape of a" T "of which the foot starts from the formwork surface and whose end formed by the "T" head bar is parallel to the formwork surface in the same plane as the two ends of the lateral fins. The two lateral fins 3 _" 6 have a C-shaped section, the opening being oriented laterally outward on the edge of the profile. Of course, we can easily understand that the number of central stiffening fins may vary if we widen the

RE P ACE ENT SHEET dimension of an element so that the fins are regularly spaced to give resistance to the assembly and limit the forces applied to the formwork surface. The production by the extrusion of two lateral fins and two central fins makes it possible to delimit open cavities 7, 8, 9 whose openings are located on the face of the profile opposite to the formwork surface in alignment with the rear ends of the two fins 3 , 6 in the shape of "C" and the two central fins of T-shaped section. The lateral fins 3 _» 4 of section in

"C," are cast so that their opening 12, 13 is towards the outer edge of the profile.

In a preferred embodiment, a sheet element as shown in section in FIG. 1 is 2.50 m high, 20 cm wide and 5 cm thick . This profile is, moreover, provided with longitudinal reinforcements 14, 15 each located on a fin, constituting a gutter providing two functions; on the one hand, an additional mass aimed at limiting the forces applied to the element and thus preventing any breakage and, on the other hand, permitting by the extreme openings of this gutter the introduction of fixing means such as screws in order to 'ensure the positioning of a receiving profile which will be explained later. These longitudinal reinforcements are alternately staggered in the succession of fins so that when we come to place this receiving profile on the edge of this profile, fasteners, then engaging in these gutters, are not aligned and offset their pressure exerted on the profile.

The production of such an element for the dimensions mentioned above makes it possible to obtain, by the use of aluminum, a weight of 3.5 kg implying in a unique way hitherto in the field of formwork, a light element easily maneuverable. In addition, the use of aluminum avoids any corrosion problem giving thus to the element an exceptional longevity.

From such a basic element, it is possible to obtain, by a simple operation, elements of complementary formwork such as in particular profiles for obtaining external or internal angles. Referring to Figure 2, there is obtained a section element profile forming an external angle 20 by a simple folding longitudinally at the center of the formwork surface. This middle of the formwork surface is located in the central cavity 28 and the center of the formwork surface coincides with the edge of the 90-degree angle formed by folding the formwork surface 22. The two lateral fins 23, 26 always have their opening towards the outside of the edge of the profile. The cavities 27 and 29 have not been modified, only the cavity 28 delimited by the central fins 24, 25 has seen its volume increased. We also find in the same way as previously mentioned the longitudinal reinforcements 14, 15. "

Figure 3 shows a section element profile 30 providing an interior angle of formwork. This corner element is produced from the basic element previously mentioned, by folding at the middle part longitudinally of the formwork surface but no longer, as in the case of an external angle, a folding impli¬ as a bringing 90 degrees of the two faces making the angle; but in this case, it is a separation at 90 degrees from the two faces involving a movement of approximation of the two lateral fins. To obtain a folding towards the rear part of the profile with reference to the support of the fins, it is necessary to prepare by cutting the two central fins so that they do not come into abutment against one another. This cutting takes place at the middle of the two central fins in the shape of a "T" so that, when the profile is folded inwards, the two remaining parts of fins 34, 35 do not come block movement. An interior angle for the formwork is then produced by cutting and folding. The prior cutting of the fins implies a deletion

REPLACEMENT SHEET for the fin 34 of the gutter for inserting the fasteners but, however, a longitudinal reinforcement gutter 14 is maintained on the fin 35. The two lateral fins of "C" shaped section are intact and their openings on the edge are oriented 90 degrees to each other.

From the basic element delivering a smooth rectilinear formwork surface, it is easy to obtain profiles of formwork elements for particular applications such as corner formwork. This passage from the base element is easily done by a simple folding and possibly cutting of the fins.

Of course in the description of FIGS. 2 and 3, the transformation has been described to obtain a right angle formwork, but it can easily be understood that it would be possible to obtain an intermediate, obtuse or acute angle by limiting the approach by folding of the two ends of the profile.

From a section element profile as previously described, large formwork surfaces are easily obtained by lateral association and by overlapping of these different elements.

Figure 4 shows in section a lateral association of these various elements. The elements 50, 51, 52, 53 are joined laterally to each other so that their formwork surface is in the same plane. A lateral fin of a first element cooperates with a lateral fin of a second element so that their openings face each other. When these side fins are joined together, a closed volume is obtained in which a connecting element 54, 55, 56 is inserted formed by an aluminum profile of square section. Figure 7 shows the cooperation between ^' this connecting element and the ends of two sections in which it is inserted. A first section 50 is attached by its lateral fin to a

REPLACEMENT SHEET second profile 51 at its lateral fin. A connecting element 62 is inserted which comes into locking, on the one hand at the bottom of the cavity against the fins and, on the other hand laterally by the return wings of the section in C, avoiding any movement from front to back . Once connecting element inserted in the two cavities of the lateral wings of the profiles 50, 51, we fix ^e by screws 63, 64 the connecting member 'the two profiles form elements. In a preferred embodiment, the fasteners

63, 64 will pass through the rear surface of the panel element to reach the connecting element 62.

FIG. 5 shows a set of section element profiles 50, 51, 52, 53 placed side by side as seen in section in FIG. 4.

After having mentioned the lateral cooperation of the section element profiles, now referring to FIG. 6, we will discover the way of associating the profiles on each other by a vertical arrangement. To do this, we just place horizontally on the upper edge of a first section, a receiving element 42, produced by an aluminum section section in the shape of "C". On the rear inner face of this “C” section, the receiving element is provided with orifices allowing the passage of fasteners which come to engage in the longitudinal reinforcements situated on each fin. These fixings could be constituted, for example, by screws. The positioning of this receiving element on the upper edge of the element allows, on the one hand a stiffening of the assembly and, on the other hand reconstitutes a shape of the profile comparable to that located laterally on said profile. On the sheet element which is going to be attached in superposition on the first element previously described, there will be fixed on the lower edge this time of the profile, a receiving element 43 having the same section in C. When the elements of

SHEET reception 42, 43 are placed on the lower and upper edges of the two sheet elements to be joined, we just engage a connecting element 44 in the opening made by the "C" shape of the first profile and, in the same way as previously described for lateral attachments, this connecting element cooperates with the other opening of the associated receiving element in the vertical cooperation. It will only remain, for a final fixing of the two elements, to place screws passing through the base of the “C” section and the connecting element. In the case of a section profiled element for an interior or exterior angle, it will easily be understood that the connecting element has a square shape as well as the profile producing the receiving element so as to allow corner cooperation of the two overlapping sheet elements. It is therefore easy to make a panel by lateral association of a basic element as well as by vertical association. When the entire formwork surface has been produced which is required, steel ribs 45 are positioned on the rear face of the section element profiles by a fixing on the head of the stiffening fins in the shape of a "T". "using screws 47.

Referring again to FIG. 5, it can be seen that these steel ribs 59, 60 cooperate laterally with all of the profiles of joined side panel elements. These ribs 59, 60 have openings for the passage of spacing elements coinciding with the orifices produced in the cavities delimited by stiffening fins. The upper edge of the section produced is delimited by a receiving element 57 and the lower edge by another receiving element 58.

The present invention therefore makes it possible to produce sectional elements sections entirely of aluminum, benefiting from a total weight of 19 kg per m ² and meeting all the uses and needs of the building and public works in no way requiring borrowing. lifting gear since

REPLACEMENT SHEET manipulable by hand. The use of aluminum avoids all corrosion problems and therefore implies an exceptional longevity of use. The easy mounting to ^r using connecting elements and reception profiles allows ease of use by unskilled labor. The particular shape of the different elements automatically ensures a leveling of square and verticality. The shape of these elements also allows for easy packaging and shipping in the form of a container. These forms therefore benefit from a mechanical assembly within everyone's reach, thus escaping the constraints of a traditional assembly using sophisticated welding techniques and complicated manufacturing.

Naturally, the invention is in no way limited by the particulars which have been specified in the foregoing or by the details, of the particular embodiment chosen to illustrate the invention. All kinds of variants can be made to the particular embodiment which has been described by way of example and to its constituent elements without thereby departing from the scope of the invention. The latter thus includes all the means constituting technical equivalents of the means described as well as their combinations.

REPLACEMENT SHEET

Claims

1. Formwork formwork element constituted by a profile (1), based on aluminum, having on a first face a smooth formwork surface (2) and comprising stiffening longitudinal fins (3,4,5,6) oriented perpendicular to the formwork surface (2) and laterally delimiting between them cavities (7,8,9) open on a second face of the profile opposite to said first face, characterized in that the fins (3,4,5 , 6) comprise longitudinal reinforcements (14,15) each forming on their ends a hollow receiving means for fixing members for assembly elements (42, 43,44) of said profiles.

2. Panel element according to claim 1, characterized in that said reinforcements (14,15) are alternately staggered in succession in the fins.

3. Sheet element according to claims 1 or 2, characterized in that two fins (3,6) of the profile each located at a lateral end of the formwork face (2) have a "C" section open towards the outside ¬ laughing on the lateral edge of the profile for the reception of a connecting element (62) between two adjacent profiles in a horizontal arrangement.

4. formwork element according to any one of claims 1 to 3, characterized in that said profile is conformable at an external angle (20) by folding the formwork surface (22) outwardly in the center between two central fins and conformable to an internal angle (30) by folding the formwork surface inwards ^• between two central fins previously cut longitudinally.

5. Formwork form comprising a plurality of assembled elements, at least some of which consist of a form element according to one of claims 1 to 4, characterized in that said elements comprise

REPLACEMENT SHEET several of said profiles which are joined laterally by a connecting element (54, 55, 56) engaging in the opening in "C" of a lateral fin of a first of said profiles and in the opening in "C" of a lateral fin of a second of said profiles, said connecting element being blocked by fastening members to said first and second profiles, in that a receiving element (42,43), of section in "C ", is mounted on the horizontal edges of the profiles by fastening members cooperating with the reinforcements located on each fin, and in that a connecting element (44) between two profiles superimposed vertically -is in cooperation with on the one hand a first receiving element (43) mounted on the lower edge of an upper profile and, on the other hand with a second receiving element (42) mounted on the upper edge of a lower profile (40).

6. Panel according to claim 5, characterized in that it comprises steel ribs ($ 4), constituting a stiffening part of the panel, fixed transversely - dirty on the fins of each profile.

7. Panel according to claims 5 or 6, charac¬ terized in that the formwork surface of said profile is provided with orifices for passage of spacing elements (72), said orifices opening in the open cavities (7, 8.9).

REPLACEMENT SHEET