FR2640663A1 - Shuttering which can be adjusted in three directions - Google Patents

Abstract

Device for the production of horizontal shuttering having any given contours. The invention allows shuttering to be rapidly put into position rapidly without any need to use conventional tools. The peg 1, driven into the ground, receives a shuttering nut 2 which slides on the peg 1 and is blocked by manually actuating the operating lever 8. The slide element 10 is adjusted in alignment and inclination and is blocked by manually pressing on the operating lever 14 by way of a load distributor 12. The shuttering profile is locked on the heel 11 of the slide element 10 by a rotation having as its axis the top of the heel 11. One alternative allows the same functions to be obtained, with a simplified construction, but requiring the use of conventional tools (spanner for tightening the screw and nut). The device according to the invention is intended in particular for producing shuttering for enclosures capable of receiving pourable materials.

Description

TRIDIRECTIONAL ADJUSTABLE FORMWORK
The purpose of the detailed invention below is to improve the execution of rectilinear or curvilinear formwork in the production of horizontal structures to receive casting materials.

 The forms are currently made with wooden planks, held by wooden or metal stakes, or executed with metal profiles held by concrete studs.

 The device of the invention makes it possible to reduce the execution time and offers the possibility of following any contours.

 The principle of the invention is to allow adjustment in three dimensions, without the need for tools.

 Figure 1 shows an exploded view of the device according to the invention.

 The stake (1) is a cylinder made of metal or impact-resistant material, about 60 cm long, with a cone at its end allowing it to be inserted into compressible materials.

 A variant may exist with a cylinder of identical diameter of approximately 25 cm in length, having at one of its ends a metal or resin plate fixed to the perpendicular and comprising, a few centimeters from the cylinder, a round hole allowing inking in hard supports.

 The metal formwork nut (2), or resin, is a parallelepiped, having on one of the vertical faces a protuberance (5).

 The parallelepiped is crossed in its vertical axis by a cylindrical hole (3) having a diameter slightly greater than the diameter of the stake (1).

 On one of the vertical faces, perpendicular to the face of the protuberance (5) there is a cavity (4) which receives an eccentric lever (8) made integral with the formwork nut (2) by an axis (7). This axis (7) is pressed into the formwork nut (2) with a negative clearance.

 The handle (8) can be made of a material resistant to friction on the stake (i) and to manual pressure. This handle (8) has at one of its ends a hole with a diameter slightly greater than the axis (7). The bulge of the handle has a curve allowing not to exceed the angle of sliding of the materials in contact.

 The protuberance (5) integral with the parallelepiped (2), positioned at the horizontal axis of the formwork nut (2) and aligned on the face opposite the cavity (4), consists of two lugs (5) (regular trapezoidal parallelepipeds) with the large bases facing each other.

 These two pins are spaced about 1 cm (6) apart and connected to each other at one of their ends by an arc of a circle coming to tangent the inclined sides of the trapezoids.

 This protuberance (5) maintains a slide (10) and allows the latter to obtain a rotation of approximately 150 up and down. The purpose of the arcs of a circle connecting the lugs is to guide the slide (10) with a play of the order of 5 / 10ths of a millimeter.

 The slide (10) produced by a U and a heel, (11), rectangular parallelepiped of about 5 cm on the upper face, about 2 cm thick, and of variable height according to the height of the profile (Fig 2 or Fig 3), can be made of metal, resin, or a combination of both.

 The base of the heel (11) has a rounded shape allowing the slide to be extracted from its housing in the formwork profile (Fig 1 or Fig 3) after the handles (8) and (14) are released.

 This rounding also allows the interlocking of the formwork profiles after leveling the formwork nut (2) and adjusting the slide (10).

 The heel (11) can also be constituted by a rectangular plate with in its angles- holes allowing the fixing of formwork wood by screwing.

 The U of the slide (5) has about 15 cm of useful length. The internal dimension of the U is slightly greater than the shape of the protuberance (5).

 The slide (10) rests on the face of the nut (2) where the protuberance (5) is located.

 The slide (10) is held in its position by a load distributor (12), a rectangular parallelepiped having on one of its faces a protuberance (13) which makes it possible to keep the load distributor (12) in contact with the slide (10) before blocking in corrector position. This protrusion (13) has a smaller dimension inside the U of the slide, of the order of 1 mm.

 The slide assembly (10), load distributor (12) is held in a fixed position by means of an eccentric lever (14) identical to the lever (8).

 The mounting of this lever (14) is carried out using a pin (9) having the same resistance and mounting characteristics as the pin (7).

 FIG. 2 represents a rectilinear formwork profile of variable length (ideal dimension varying from 1 m to 4 m)., Which can be made of metal, or plastic.

 The shape of the profile represents a U with unequal branches.

The small branch of the U is extended by an inward return of about 2 cm in length with an angle of about 60 relative to the small branch.

 The internal dimension of this U corresponds to the vertical dimension of the heel (11).

 FIG. 3 represents a curved formwork profile, of variable length, having the same characteristics as the profiles of FIG. 2.

 This profile has elements (16) of about 5 cm in length for receiving the heels (11) of the nuts (2).

The connection of these elements is carried out by a strip (15) of metal or plastic sufficiently flexible to allow the achievement of the desired curves.

 A variant is possible for straight profiles.

It is indeed possible to produce a formwork with a key, a sort of protrusion on the vertical face of the profile at about 2/3 of the height relative to the top of the profile, to allow keying between two consecutive castings.

 To facilitate adjustment, the upper face of the nut (2) must correspond to the upper face of the formwork profile, the heel will therefore be reduced by the thickness of the material of the upper face of the formwork profile.

 To have perfect continuity, both in alignment and in altimetry, it is desirable to place a heel in the middle of the junction of the profiles, even if the stake (1) cannot be put in place.

 A variant of the assembly - stake (i), nuts (2) and slide (10) can be produced by replacing the nut (2) with a cylindrical tube having an internal diameter 1 to 2 mm larger than the stake. The cylindrical tube is drilled in the axis on its side by a threaded hole. This threaded hole receives a head screw H which allows by screwing the pinching of the cylindrical tube on the stake. This head screw H passes through the U of the slide (10). The slide (10) is held in position by a nut of the same diameter as the head screw H.

 With regard to the mode of use, after defining the contours to be made, the formwork profiles are positioned end to end according to the layout to be observed.

The insertion of the stakes (i) is carried out manually or mechanically at locations judiciously determined by the user (joining of profiles).

 For straight formwork the distance between stakes should not be more than 1.50 m. For curvilinear formwork the distance between stakes is approximately 0.50 m.

 The stakes being positioned, it is necessary to introduce the formwork nut (2) on its axis and slide it from top to bottom, so that the upper face of the nut (2) is at the desired level.

 The blocking in its position is carried out by lowering the handle (8) with a simple pressure of the hand.

 After adjustment in alignment, altimetry, and inclination, the blocking of the slide (10) is obtained by hand pressure on the lever (14) which gives the load distributor (12) a thrust which allows, by pinching to block the slide (10) between the vertical face of the nut (2) and the two contact points of the load distributor (12) on the U of the slide (10).

 When all the sets, - stakes - (1), nuts (2), slide (10) - are adjusted and locked, the formwork profiles are placed on the heels at an angle of approximately 30 and by simple rotation of the formwork profile compared to the top of the heel, the profile takes its final place.

 After the casting and hardening of the chosen material it is possible to remove - nuts (2) and slide (io) - by unlocking the handles (8) and (14) by translating the nut on its stake from the bottom up.

 The stakes can therefore be removed without risk. The relationship between stakes and formwork profiles, no longer existing.

 The formwork profiles can therefore remain until the material used has completely hardened.

 This invention makes it possible to produce enclosures with any contours on any support, in particular for concrete or mortar slabs or screeds.

 It is possible for certain applications to modify the profile of the formwork while keeping the adjustment system, such as for example the curbs.

Claims (10)

 1 / Device to allow adjustment of enclosure formwork in three dimensions without intervention of any tool characterized by an assembly, - stake (1), nuts (2) and slide (10) - allowing to receive a profile formwork (see Figure 2).  After driving the stake (1) into the ground, the user slides the nut (2) from top to bottom. Locking is effected by lowering and pressing the handle (8). On the protuberance (5) integral with the core (2), 'the slide adjusts in translation and inclination. locking is effected by lowering and pressing the handle (14). This lever exerts pressure on a load distributor (12) and keeps the slide (10) pinched between a vertical face of the nut (2) and the two ends of the load distributor (12). The heel (11) of the slide, given its shape, makes it possible to receive a formwork profile by simple interlocking.  2 / Device according to claim 1 characterized in that a simplified version can be achieved, having the same function, but requiring the use of conventional tools for adjustment.  After driving the stake (i) into the ground, a cylindrical tube slides on the stake (1), blocking is then achieved by tightening a screw, the two branches of the U of the slide (10) pass from side to side. 'other of the axis of the screw. The slide is maintained by pinching between the cylindrical tube and a nut of the same diameter as the screw.  3 / Device according to claim 1 characterized in that it has a homogeneous block for receiving all the locking levers.  4 / Device according to claim 1 or claim 3, characterized by identical handles (8) and (14), with an eccentric curve layout adapted to the materials in contact, to allow these handles to obtain a constant and progressive tightening . The joysticks can only be released by voluntary manual intervention.  5 / Device according to claim 1 or claim 3, characterized by a slide (io) allowing a transverse adjustment and an inclination adjustment with a heel variable in height and width to receive a formwork profile made for this type of adjustment.  6 / Device according to claim 5, characterized by a rectangular plate to replace the heel for formwork profile, with in each of its angles a hole for fixing a board by screwing.  7 / Device according to claim 1, or claim 3, or claim 4, characterized by a load distributor (12) for exerting a balanced pressure on the two branches of the slide (10). The load distributor (12) can only be dismantled if the lever (14) is in a vertical position.  8 / Device according to claim 1, or claim 7, characterized by a slide (10), interchangeable according to the profile used. The slide (10) can be detached from the shuttering nut (2) without any tool intervention.  9 / Device according to claim 1, or claim 5, or claim 6, or claim 8, characterized by a formwork profile suitable for slides, allowing the realization of straight formwork (Figure 2), or curvilinear (Figure 3) .  10 / Device according to claim 1, or claim 5, or claim 6, or claim 8, or claim 9, characterized with regard to the implementation, by the use of tools, to achieve blocking of the whole without its final position.