EP0553015B1 - Apparatus for aligning and gathering shuttering panels - Google Patents

Description

The subject of the present invention is a device for bringing together and flushing shutters, intended in particular for the production of concrete structures.

It will find its application in the field of construction, and more particularly in that of the construction of concrete structures or buildings.

In such areas, vertical walls of varying thickness are more commonly designated by those skilled in the art under the name of "veil".

To make such sails, we use a technology called "shuttered concrete" which consists of pouring concrete between two formwork panels called "formwork".

The forms have dimensions and in particular lengths and heights which are different depending on the use for which they are intended. They are constituted by a wooden or metal frame which carries on one side a covering which is called "shuttering face", the other side being free. This frame has longitudinal members which extend over at least part of the length of the longitudinal sections by which the panels are to be assembled and cross members constituting spacers connecting the longitudinal members to each other on a part of the transverse sections of the panels.

To make large structures, you have to combine and assemble different forms between them. This assembly is carried out by means of threaded rods passing through the edges of neighboring panels, associated with one another by nuts screwed onto rods to ensure tightening and holding.

This assembly can be completed by the installation of fishplates or additional stiffening members.

In practice, this work is long, tedious and requires a large workforce, which considerably increases the cost of the site.

In addition, the assembly of these forms by such techniques has a drawback residing in the difficulty of flushing and bringing together the forms to be assembled. Given that it is difficult to achieve perfectly flat walls because of the deformation resulting from the pressure exerted by the concrete on the formwork surface during setting, it is even more difficult to be flush and bring the formwork together during their assembly.

Another drawback of this method of assembly lies in the fact that the alignment of the shuttering surfaces is made random due in particular to the play of the rods in the holes made in the formwork. This alignment can only be done in determined positions corresponding to the holes coinciding with the rods, which limits their possibilities of use.

To overcome this drawback, it has been thought to produce formwork which comprises means of assembly on edges which are formed on the one hand by a male part having a conical portion which cooperates with a conical sleeve integral with an edge profile of the formwork and extended by a threaded rod and on the other hand by a female part provided with an internal thread which cooperates with that of the rod. This female part also has a conical part which engages in a conical sleeve fixed in the edge profile of the neighboring panel.

The conical part of the male part, which is mounted in a protective box, generally has a shoulder preventing the jamming of this part during its tightening.

It has also been thought to be flush with the formwork of two formwork panels, to produce a part which comprises two members each with two pivoting levers bearing on the frameworks of the two panels.

However, whatever their form and nature, such devices are of a complex design, of a high price because of the need to achieve them by long and complicated machining and of use on the site not very easy. . In addition, they are intended to be placed on panels which have particular structures often reported which limits the possibilities of implementation.

French patent GENDROT FR-A-2,655,679 describes a device for assembling formwork panels making it possible to bring two forms together. This device comprises means for flush with the formwork surface of the panels. This patent does not describe a device for bringing together and flush two formwork making it possible to bring together the formwork simultaneously at the outcrop, which uses two pairs of male and female parts as well as means for bringing together the formwork surfaces for formwork.

This French patent FR-A-2,655,679 does not provide additional ramps on the male part which allow the formwork surfaces of the formwork to be flush with the surface in order to bring them together simultaneously with the leveling.

The device for assembling shuttering panels described in French patent FR-A-2,655,679 consists of parts which, by construction, have tolerances that are too tight and this device therefore wears down when it operates which makes it quickly unusable.

The present invention seeks to remedy the drawbacks of the devices currently used by providing a device for bringing together and flushing the formwork, which is of a simple, robust design, easy to implement.

• permettant de rattraper le décalage existant entre les surfaces de coffrage et éviter les aspérités sur le béton et
• destiné notamment à la réalisation de structure en béton,

• chacune desdites banches comportant une surface de référence parallèle et ajustée (11) à la surface coffrante de ladite banche,

est caractérisé en ce que ledit dispositif comprend :

• deux couples de pièces mâle (7) et femelle (8) et
• des moyens (10) pour rapprocher les deux banches, par l'intermédiaire des deux couples, simultanément à l'affleurement des surfaces de coffrage desdites banches (1, 2),
• chacune des pièces mâles (7) comprenant
  • une rampe (26, 27) et
  • une surface de référence destinée à coopérer avec chacune desdites surfaces de référence (11) des deux banches (1, 2),
• chacune des pièces femelles (8) comprenant au moins une rampe (19, 20) complémentaire à la rampe (26, 27) de la pièce mâle (7)
  les rampes (19, 20 ; 26, 27) formant des moyens pour faire affleurer les surfaces de coffrage des deux banches (1, 2).

To this end, according to the invention, the device for bringing together and flush with two forms (1, 2),

• making it possible to make up for the existing gap between the formwork surfaces and avoid roughness on the concrete and
• intended in particular for the production of concrete structures,

• each of said forms comprising a reference surface parallel and adjusted (11) to the formwork surface of said form,

is characterized in that said device comprises:

• two pairs of male (7) and female (8) parts and
• means (10) for bringing the two forms together, by means of the two pairs, simultaneously with the leveling of the formwork surfaces of said forms (1, 2),
• each of the male parts (7) comprising
  • a ramp (26, 27) and
  • a reference surface intended to cooperate with each of said reference surfaces (11) of the two forms (1, 2),
• each of the female parts (8) comprising at least one ramp (19, 20) complementary to the ramp (26, 27) of the male part (7)
  the ramps (19, 20; 26, 27) forming means for flushing the formwork surfaces of the two forms (1, 2).

Thanks to the use of a device according to the invention placed on each panel, it is possible, due to the symmetry of the male and female parts constituting each device, to obtain by simple action on one of the devices l outcrop and the simultaneous bringing together of these panels.

In addition, due to the presence of tolerances on the complementary parts of the male part and the female part of the device, the positioning of the forms can be adjusted during their assembly in order to avoid roughness on the concrete.

Another advantage of the device according to the invention lies in the fact that it can be placed on the formwork so as to avoid the use of complementary members.

Another object is that it is simple to set up and that it allows, without the use of significant tools, the outcrop and the bringing together of the formwork in a single operation.

Another object of the present invention lies in the fact that the device allows rapid detachment of the two panels ensuring self-cleaning of concrete residues.

During operation and use of the device according to the invention, the various parts have normal wear and tear, which makes it possible to manufacture them with much smaller tolerances. The device according to the invention can therefore still continue to operate, even after long and intensive use, whatever the wear of the formwork surfaces.

Another object of the present invention lies in the fact that, whatever the wear of the male and / or female parts, the formwork surfaces will always come to be pressed in a position which ensures an adapted positioning of the two panels which avoids the roughness of the concrete.

Another object of the present invention lies in the fact that during the installation of the device, as a function of the intensity of the mechanical action of support exerted, a corresponding plating is generated on the reference surfaces, which increases the adjustment as needed.

Another object of the present invention lies in the fact that the device consists of robust male and female parts, of a simple design which allows mass production at low cost. In addition, these parts are compact and in reduced number, which facilitates their use on the site and reduces the cost of the operation.

The invention will be clearly understood if reference is made to the description below as well as to the accompanying drawings which form an integral part thereof.

Figure 1 is a schematic view which illustrates two formwork panels assembled using a device according to the invention.

Figure 2 is a schematic view showing a female part.

Figure 3 is a schematic view illustrating a male part.

Figures 4 to 6 are schematic sectional views which illustrate the kinematics of the establishment and removal of the device according to the invention.

The present invention relates to a device for bringing together and outcropping of formwork intended in particular for the production of concrete structures.

It will find its application in the field of civil and military engineering as well as in that of construction and more particularly in that of construction of concrete structures or buildings.

Referring to Figure 1, we see two formwork panels (1), here rectangular, assembled on edge. Each panel (1) comprises a frame (2) made of metal, composed of side members (3) and cross members (4) which constitute spacers which connect the side members (3) to each other. A covering (5) constituting a smooth formwork face such as for example a metal plate or any other suitable material is fixed by means of bolts or screws on one side of the frame (2).

• des moyens (9) pour affleurer les surfaces coffrantes des panneaux,
• des moyens (10) pour rapprocher simultanément à l'affleurement les surfaces de coffrage des panneaux,
• des moyens (11) pour ajuster le positionnement de l'affleurement et du rapprochement.

The panels (1) are assembled on edge with an alignment of their shuttering face (5) by means of a device according to the invention. This device comprises a male part (7) and a female part (8) which comprise:

• means (9) for flush with the formwork surfaces of the panels,
• means (10) for simultaneously bringing the formwork surfaces of the panels closer to the surface,
• means (11) for adjusting the positioning of the outcrop and the approximation.

In Figure 2, there is more particularly shown a female part (8) of the device according to the invention. This female part (8) has a body (12) constituted by a U-shaped profile with a shape complementary to that of the edge profiles of the formwork panel. Thus, thanks to this particular shape of the body profiles (12), this female part (8) is secured by conventional welding techniques or any other technique suitable for the edge profile of the panel (1) without the need to make specific modifications or layouts on the panel structure. The U-shaped body (12) has a flat central wall (13) and two lateral walls (14, 15) arranged perpendicular to the central wall (13) on either side of a central plane, delimiting housing.

The middle wall (13) has at one of its ends (16) a cut-out constituting an oblong opening (17) and, at the other of its ends (18), two inclined guide rails (19, 20) on the and on the other side of a median plane, which extend substantially over the entire length of the wall (13) constituting the flush means (9). Each inclined guide rail (19, 20) is respectively fixed to each lateral face (14, 15) perpendicular to the wall (13) extending to a distance D from the edges (21, 22) in order to delimit an area of tolerance, which constitutes the means (11), intended, after installation and cooperation with complementary members of the male part (7) in the mounted position, for an adjustment of the formwork between them by making up for the existing offset. This correction of the offset thus makes it possible to avoid, when placing the concrete, the roughness of casting, which gives the surface of the concrete a non-smooth appearance.

In Figure 3, more particularly illustrated the male part (7). This part (7) comprises a body (23) which also has a U shape complementary to that of the edge profile of the panels and a shape complementary to the body (12) of the female part (8). At one of its ends (24), the body (23) has a pin (25), which projects in a vertical plane, and two inclined guide rails (26, 27) which extend, in the vicinity of the end (28) of the body (23), by a spout (29, 30). The other end (31) of the body (23) has a stop (32) which extends perpendicularly between the two inclined guide ramps (26, 27).

The male part (7) also comprises a member (33) here of rectangular shape in which is formed a tapped hole (34) passing through it right through, parallel to the bolt in order to cooperate with a threaded rod (35) d 'a tightening bolt (36) constituting the means (10).

It should be noted that according to the invention, it is possible to bring two panels (1) each comprising a device according to the invention and to allow them to be flush from the tightening of the bolt (36) both on the right and on the left . This results in simplicity of use and implementation compared to the devices currently used and known, in particular because of the reduced number of parts used and their symmetry.

Furthermore, it should also be noted that the parts (7 and 8) are of a simple and robust design and that they do not require the use of complex members produced from long and precise machining.

In an alternative embodiment, it is also possible to provide an axis to replace the guide rails or any other equivalent means which ensures guidance and adjustment of the positioning of the panels (1) allowing them to be flush and brought together simultaneously.

In addition, it is also possible to provide, in order to avoid untimely and unwanted displacement of the bolt (25), in particular when the nut (36) is unscrewed, elastic members such as a spring which make it possible to maintain it in desired position.

Similarly, it is possible to associate with the device other elements such as for example a position stop (37) whose shape and dimensions are compatible with the desired use.

To set up the device according to the invention and ensure the simultaneous bringing together and flush of the two panels (50, 51) as more particularly illustrated in FIGS. 4 to 6, the procedure is as follows:

As illustrated in FIG. 4, each panel (50, 51) has a device according to the invention, the parts of which are arranged so as to work in opposition. Each panel (50, 51) is placed so as to present their edge facing one another in a position such that the bolts (52, 53) are placed in a head to tail configuration. The targette (52) of the panel (50) can be either a targette fixed directly on the edge of the panel or alternatively as more particularly illustrated in this figure, a targette like that which is placed on the body of the male part (7). The targette (53) of the panel (51) is itself a targette of a male part (7) according to the invention. In this position, the body (23) of the male part (7) and in particular the guide ramp (26, 27) cooperates with the housing formed by the wall (13) and the walls (14, 15), as well as the guide rails (20, 21) of the female part (8).

To ensure the simultaneous bringing together and flush of the two panels (50, 51), we first slide the male part (7) into the housing of the female part (8), then by means of the tightening bolt ( 36), the panels (50, 51) are brought together until they are in a position as illustrated in FIG. 5, in which the spouts bear against one another.

Whatever the wear of the rails (20, 21) of the female part (8) and of the ramps (26, 27) of the male part (7), the formwork surface of each panel (50, 51) is pressed , which ensures an appropriate positioning thereof.

Furthermore, as a function of the intensity of the mechanical bearing action exerted when the device is put in place, the plating of the reference surfaces is adjusted.

It should be noted that due to the tolerance D of the female part (8), it is possible to easily adjust the outcrop of the panels (50, 51) so as to avoid the roughness phenomena resulting from the casting of the concrete.

Advantageously, this simplicity of bringing together and flush with the formwork surfaces of the panels (50, 51) allows, during the removal by simple loosening of the nut (36), as illustrated in FIG. 6, rapid release of the residues concrete that can be retained, which ensures self-cleaning. In this position, the male part (7) remains confined inside the housing of the female part (8).

Claims (9)

1. Device for gathering and aligning two shuttering panels (1, 2) allowing to take up the offset existing between the casing surfaces and to avoid the unevennesses on the concrete and viz. intended for making concrete structures,

   - each of said shuttering panels including a reference surface (11) parallel and adjusted to the casing surface of said shuttering panel,

   characterized in that said device includes:

   - two pairs of male (7) and female (8) parts, and

   - means (10) for gathering both shuttering panels through both pairs simultaneously with the aligning of the casing surfaces of said shuttering panels (1, 2),

   - each of the male parts (7) including a ramp (26, 27) and a reference surface intended for co-operating with each of said reference surfaces (11) of both shattering panels (1, 2),

   - each of the female parts (8) including at least one ramp (19, 20) complementary to the ramp (26, 27) of the male part (7), the ramps (19, 20; 26, 27) forming means for causing the casing surfaces of both shuttering panels (1, 2) to align.
2. Device according to claim 1, characterized in that the male and female parts (7, 8) have a body of a shape complementary to that of the edge profile of the casing panels.
3. Device according to claim 1, characterized in that the female part (8) has a body (12) formed by a U-shaped profile.
4. Device according to claim 3, characterized in that the median wall (13) of the body (12) of the female part (8) has at its one end an elongated slot and at its other end two inclined guiding rails (19, 20) arranged on both sides of a median plane extending substantially over the full length of the wall (13).
5. Device according to claim 1, characterized in that the male part (7) includes a body (23) having a protruding slide bolt (25).
6. Device according to claim 5, characterized in that the body (23) of the male part (7) has two inclined guiding ramps (26, 27) on both sides of a median plane.
7. Device according to claim 6, characterized in that each guiding ramp (26, 27) has a nose (29, 30).
8. Device according to claim 5, characterized in that the male part (7) includes an organ (33) which has a tapped hole (34) passing straight through same with a view to co-operate with a threaded rod (35) of a tightening bolt (36).
9. Device according to claim 1, characterized in that the portions of the male part (7) which must co-operate with complementary portions of the female part (8) have a tolerance with a view to adjust the mutual positioning of the shuttering panels.

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