JPH02179706A - Improved form for producing concrete member of staircase - Google Patents

Abstract

PURPOSE: To rapidly and accurately regulate the inclination of a partition plate of molding upper and lower paces of a stair by covering a plurality of overall molding elements with a flexible water-tight thin plate and providing a thin plate tension generating mechanism and a partition plate angle regulating mechanism between the elements. CONSTITUTION: One bottom 3 is placed between two partition walls in a form for manufacturing a concrete element of a stair. The bottom 3 is formed of juxtaposed molding elements 4, 5. A flexible thin plate 5 watertightly movable to the concrete is coupled to the elements 4, 5, and connected by a mechanism 7 for giving a tension thereto. Modules 4 of the molding are formed of two partition plates 11, 12, which are coupled to one another along edges of a bihedral formed therewith, and trucks 9 for supporting it is coupled thereto. The two trucks 9 are coupled by an extending and contracting mechanism 13. Thus, the planar angle of the bihedral of the two partition plates can be regulated, and can be matched to a size of an angle of an non-skid of each tread of the stair to be manufactured.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improved adjustable formwork for producing concrete elements of stairs, for example.

An adjustable formwork for producing concrete stairs is known from French Patent No. 2,576,830.

This conventional formwork includes, inter alia, an underframe on which a bottom part, two front and rear transverse partition plates (partition plates) connected to the underframe, and two longitudinal partition plates are provided. There is a partition board on it.

The bottom of this formwork is assembled into dihedral bodies each projecting into the formwork.

It consists of a number of juxtaposed molding elements and a continuous belt that is watertight and soft against the concrete that covers and conforms to the shape of the molding elements.

Each molding element consists of two partitions of adjustable length, which are connected to each other along the edges of the dihedron they form and whose angles they form. It includes a telescoping arm fixed to both dividers so that the

Therefore, by changing the length of the partition plates and the angle they form, the geometry of the bottom of the formwork can be varied and different dimensional characteristics (tread height, tread length and tread length) can be varied. The same formwork can be used to manufacture stairs with a non-slip angle).

The further elements of the molding are supported by carriages which ride on longitudinal guide rails of the formwork. More specifically, each truck is arranged so as to support two adjacent partition plates, which belong to two adjacent molding elements, respectively, by the lower sides of the partition plates.

Furthermore, each trolley is arranged in such a way that either of the lower ends of the partition plates supported by the trolley can be moved closer together or further away, in which case a soft belt forms a loop between two adjacent elements. can be tightened between the two modules in order to wrap around rollers supported by a carriage, or can be loosened in order to be moved relative to the partitions of the molding elements, especially when adjusting the formwork. As shown, the trolley supports the partition plate.

By using a soft continuous belt as a covering element for the molding element, the problem caused by the lack of watertightness of the molding can be specifically solved.

However, in use, if this continuous belt tears, the inconvenience of having to replace the entire belt, even if the crack or deterioration is limited to one part of the heddle, is It has become clear that in some cases.

Tensioning of conventional formwork belts was done by tension rolls at the ends.

In use, it has become clear that this solution is not entirely satisfactory, apart from the fact that it is relatively complex to operate.

Conventional formwork had one beveled partition plate on the bottom that could produce a landing under the stairs.

This partition plate was connected to a device for adjusting its inclination.

This device as originally conceived does not allow for rapid and precise adjustment of the tilt.

Moreover, the conventional formwork is not equipped with a molding device for the lower landing of the stairs.

The present invention aims to eliminate the above-mentioned inconveniences by using an improved formwork that, in case of deterioration, allows rapid repair of the watertight element by simply replacing the deteriorated part.

Another purpose of the invention is to provide watertight elements? The object of the present invention is to realize an improved formwork as described above so that it can be tensioned in an effective manner.

Finally, another object of the invention is to provide an improved formwork as described above, so that the inclination of the molded partitions of the upper and lower landings of the stairs can be adjusted quickly and precisely.

For this purpose, the improved formwork according to the invention, for example for producing concrete elements of stairs, includes an underframe on which two partitions, sometimes perpendicular in the longitudinal direction, are arranged. , resting on a bottom placed between these two partition plates, the contour of which can be varied geometrically and complements the contours of the row of treads and one or two landings of the staircase. The bottom of the staircase is constituted by juxtaposed molded elements, each juxtaposed to form a dihedral projecting into the formwork, each containing a molded part of the associated tread. adjustable sloping edges, each dedicated to the manufacture of the board module and the upper and lower landings of the staircase, and connected to either module at the end of the molded module of the row of treads; The essential feature is that each molded element 4 or 5 has a thin plate (foil) which is watertight and flexible to the concrete and covers the entire element. in combination, the lamina is arranged between this element and at least an element adjacent to this element, and both elements on which the lamina rests, and a tensioning device. The reason is that they are joined by.

Despite other properties, each watertight lamina is secured to the tensioning mechanism by a quick clip system.

Therefore, if the bottom watertight covering is torn, it is not necessary to replace the entire covering, but only the torn part, which can be easily carried out by means of the quick clip system.

Other advantages and characteristics of the invention will be seen in the following description of a preferred embodiment of the embodiment, given by way of non-restrictive example based on the drawings.

As mentioned above, the improved formwork according to the invention, for example for producing concrete elements of stairs, includes an underframe 1 on which vertical vertical It is surmounted by two partition walls and a base 3 placed between these two partition walls, the geometrically variable contour of which is similar to that of a series of treads and a base 3 of a staircase. It complements the contours of one or two landings.

The bottom part 3 is constituted by juxtaposed molding elements, which contain modules, 4 and adjustments, each assembled in a shaped dihedral projecting into the formwork and molded into juxtaposed treads. two partition plates at the ends of the possible slopes, for producing the upper and lower landings of the staircase, respectively, and both modules at the ends of the molded side-by-side modules of the tread. are connected to each other.

Between each molded module of the treadboard, a core of a shape suitable to complement the non-slip shape of the treadboard is arranged.

According to the invention, each formwork element is connected with a flexible sheet 6 which can move in a watertight manner relative to the concrete, which sheet covers the entire element with which it is associated and which is at least connected to this element. Between the elements adjacent to this element, a tensioning mechanism 7 connects both elements arranged on both sides of this element and covered by the lamella.

The two horizontal partition plates of the formwork are preferably placed on the movable structure of the underframe 1 by moving them away from the bottom 3 or by approaching them and pressing them against the bottom, which are aligned with the longitudinal axis of the formwork. This is due to translational movement along the lateral direction.

For this movable structure, an actuation method that is known per se is involved.

The molded modular treads extend in a transverse manner into the formwork, and the rail lO is fixed to the underframe of the formwork.
It is supported along its length by a carriage mounted on it for movement and extends along a direction parallel to the longitudinal axis of the formwork.

Each molded module 4 has two partition plates 11 and 12.
These two partition plates are fixed to each other according to the edges of a dihedron formed by and supported by two carriages 9, one of which supports the first partition plate 11 by its lower end. , and other carts have other partition plates 1
2 is always supported by the lower end of this plate.

The length of the two partition plates of each module can be adjusted so that the contour of the bottom of the formwork matches the contour of the treads of the staircase to be manufactured. Each module can be tailored to the height and length of the stair tread to be manufactured.

Further, these two partition plates are connected to each other along the edges of the dihedron they form, and each partition plate is
It is connected to a truck 9 that supports it. Furthermore, the two carriages 9 supporting the same molded module are connected to each other by means of a mechanism 13 which can at least extend and retract.

With this device, it is possible to adjust the plane angle of the dihedral formed by the two partition plates, and as a result, this angle can be matched to the magnitude of the angle of each tread cleat of the staircase to be manufactured. .

It is interesting to note that this arrangement allows each molded module 4 to be adjusted independently of the other modules.

The resulting staircase can therefore be manufactured with treads of different dimensions if required.

The mechanism 13, according to a first form of embodiment, is constituted by at least a telescopic arm constituted by two threaded rods 37 and 38, one of the rods being
One rod is connected to one of the two carriages supporting the module, and the other rod is connected to the other carriage supporting this same module.

Each threaded rod exhibits a thread and notch that is opposite to that of the other rods.

The threaded rod meshes with a sleeve 39 which has two internal taps each mating with a screw pinch of one threaded rod.

This sleeve is attached by a rotational drive.

By rotating the sleeve, the length of the arm 13 can be lengthened or shortened depending on the direction of rotation.

Advantageously, each molded module has a number of telescopic arms connected thereto, which can be moved simultaneously by the transmission of the same force.

By way of example, this force transmission is carried out by a number of toothed pinions 40. each wedged into a sleeve. and 12 pins 41 that mesh with each toothed pinion. Furthermore, the sleeve 39 of the first telescopic arm 13 is provided with a manual handle 42 .

According to another form of embodiment, the mechanism 13 is constituted by a manual spindle 43 parallel to the edge of the dihedral, which spindle has a partition of at least two threads, one of the threads following a left pitch; The others are threaded according to the right hand pinch, each of which engages a napht 44. This nut is connected at two points of the diametrical joint with the ends of two symmetrical link rods 45, which by their other ends connect two cylindrical rods 46 parallel to the manual spindle. and each is connected to one of the trolleys and the other, respectively.

The two link rods 45 connected to the same NAND are arranged in opposite shapes compared to the link rods of other NANDs, but have the same length. This is because the manual spindle moves while rotating, thereby allowing the two cylindrical rods to move simultaneously in parallel motion. This movement allows the threaded spindles to be moved apart or approached in a symmetrical manner.

More preferably, the two groups respectively formed by the left pitch screw and its two link rods and the right pitch screw and its two link rods mesh with each other to form the same assembly. .

In the mechanism of the present invention, a large number of these aggregates are regularly arranged.

Advantageously, the two interdigitated groups have a common joint on the cylindrical rod.

The fishing spindle 43 is advantageously installed at the end of the operating landing.

The spindle can be moved manually using a manual handle, or it can be stationary using a rotary drive motor arrangement.

As is known from French Patent No. 2,576,830, each partition plate of each molded module of the tread is preferably constituted by a partition container containing partition plate pieces in a slidable manner; Each piece is joined to the previous plate by the same operating mechanism that slides the plate contained within the divider container in one direction or the other.

Such a mechanism is described in French Patent No. 2,576,830.
It is also stated in the specification of the issue.

Each carriage 9 is connected to two adjacent molded elements.

The trolley, which is connected to two molded modules, supports each partition plate of one module and the partition plate close to the previous partition plate that is carried to the adjacent module. There is.

Each truck 9 consists of a horizontal base plate 14 with a rotating device 15 cooperating with the guide rail 10 for rotation, and two supports 16 mounted on this plate 14 so as to project upwardly. .

Two adjacent partition plates, each belonging to an adjacent element supported by this carriage, are connected in each case to both supports 16 along an axis of articulation parallel to the edge of the dihedral.

The healds 6 of the two adjacent molded elements supported by these two columns are partly located between these branches, so as to be joined to the same tensioning mechanism arranged between these columns. It has become.

The mechanism 13 associated with each molded module 4 and the two carriages 9 supporting this element is fixed via articulations to the struts 16 of one of these carriages and to the struts 16 of the other carriage.

More preferably, one of the two supports of each carriage is parallel to the edge of the dihedron formed by each module of the molding and is capable of some degree of rotational movement about a horizontal geometrical axis. This means that he is on the same play as 14.

This arrangement allows the mold-filled modules to be pressed together by pushing or pulling along the longitudinal direction of the formwork, by sandwiching the watertight sheets 6 and the inserts. , since no gaps are created between the molded modules, 1. This is a method to ensure watertightness at the bottom of the formwork.Alternatively, by this arrangement, the dimensions of each molded module of the tread can be adjusted. It is also possible to separate the molded modules from each other by making them possible and by inserting inserts.

According to a preferred form of embodiment, one of the molding devices at the ends is fixed to a rear structure 17 fixed to the underframe along the row of carriages, while the modules at the other end are , is connected to the push and pull device 19 by the rear truck of the row of trucks on which it is placed.

This pushing or pulling device consists of a structure 20 which rides movably on a guide rail 21 on the upper part of the underframe of the formwork, which extends parallel to the longitudinal axis of the formwork.

This structure 20 is equipped with a motor device for reliable movement in one direction or the other on the rails of the underframe of the formwork.

This motor device consists of a non-coupled electric motor fixedly mounted on the moving structure, operating via a suitable motion transmission device, in which two pinions are connected to the top of the formwork. It meshes with the teeth of the rack fixed to the rack and transmits energy.

This electric motor is fitted with a control device which is itself known.

As already mentioned, each module 4 at the end is fitted with a molded partition 5 of one of the two landings of the staircase.

According to a preferred form of embodiment, the molding partition of one of the dance halls, for example the lower dance hall, is attached to a fixed structure 17 at the end of the row of trolleys 9, while the other part of the stairs The other partition plate 5 for inserting the mold into the dance hall is attached to a support that corresponds to a cart at the end, and this cart is a cart connected to a moving structure 20 of a pushing and towing device. .

The two partition plates are connected by an axis parallel to the ends of each dihedron formed by the molded modules of the tread plate.

Each temporary partition 5 is further supported by a device for adjusting its inclination.

The device for adjusting the inclination of the molding partition plate of the upper dance floor is supported by a moving structure, while the device for adjusting the inclination of the other temporary partitions is supported by the underframe of the formwork.

These two surfaces extend under the partition plate 5, and one is fixed to the temporary partition 5, and the other is an extendable and retractable surface, which is fixed via a joint connected to a part of the formwork supporting the so-called control device. Each device is configured by a device 22.

This part of the formwork may be a movable structure 20 or a frame of the formwork.

The movable structure 20 preferably comprises a movable pedestal slidably fixed to, for example, a tilt adjustment device.

This telescoping device is constituted by an actuating spindle 23 having at least two threads, one of which is threaded according to a left-hand pitch and the other is threaded according to a right-hand pitch, each of which The two arms 25 are symmetrical with respect to the geometry of the actuating spindle, and the two arms 25 are symmetrical with respect to the geometry of the actuating spindle. The arms of the other nuts are arranged opposite to each other and have the same length. They are fixed in pairs through joints connected to the geometric axes of the joints.

These geometrical axes are mounted on each side of the spindle and are fixed in each case through articulations in the partition plate and in the part of the formwork supporting this control device.

It can therefore be seen that the rotational action of the spindle facilitates the translational movement of the threaded seat 7, thereby promoting the simultaneous movement of the four arms 25.

As these arms widen or conversely approach the geometrical axis of the spindle, the spacing between the two axes 26 becomes wider or smaller, which eventually results in one of the partition plates rotation about an axis in either direction or in the opposite direction is facilitated.

It must be noted that during operation of the spindle, the axis 26 moves parallel to and symmetrically to the spindle.

As a result, the spindle always occupies a position equidistant between these two axes.

Preferably, a left-handed threaded nut and its two arms 25 and a right-handed threaded nut and its two arms 25
The two glues respectively formed by are connected to each other. That is, the two arms have a common point of articulation at the axis 26 and form the same mass, and as mentioned above, the telescoping device can be said to have many masses fixed to the same working spindle.

Each telescoping device has at least one protruding post 2
7 are connected, according to the geometrical axis of the working spindle, to the working spindle by one of the ends of the protruding struts and by the other end of the formwork supporting the tilt control device. It is connected to one part (the pedestal or frame of the movable structure), the inclination of which follows the geometrical axis of the articulation parallel to the geometrical axis of the articulation of the partition plate.

This geometric axis is the geometric articulation axis of the partition plate in the modules to which it is connected, and the geometric articulation axis of the extension device in the part of the formwork supporting the inclination control device of the partition plate. and are arranged according to a geometric plane containing the target axis and occupying equal distances between these two axes.

Furthermore, the distance between the two articulation points of the protruding column is determined by the geometric axis of the articulation of the partition plate 5 in the module of the corresponding tread and the geometric axis of the articulation of the extendable device in this partition I-5. Equal to the average of the distance values between the axes.

According to a preferred form of embodiment, a number of parallel protruding columns of equal length are arranged in one part of the formwork supporting this control device (
pedestal or frame of the movable structure) and a stretching device.

These projecting struts serve to maintain the working spindle according to the geometrical plane containing the articulation axis of the tensioning device in the structure of the partition 5 and the formwork, and prevent the working spindle from being deformed by buckling. Preventing.

Furthermore, these projecting columns also contribute to the positioning in translation of the working spindle. It is covered by a thin plate 6 made of a dense material.

Both the partition plate for molding of the lower dance hall and the molding module connected to this partition plate for molding of the lower treads of the stairs are covered by a single watertight thin plate, which is It should be noted that a tension mechanism connects any of these elements.

According to a preferred form of embodiment, each mechanism for tensioning the lamella covering the molded module is connected in each case to the lamellas 6 of two adjacent molded elements connected to the same carriage 9.

Each of these tensioning mechanisms is preferably fixed to this carriage and located at a lower level compared to the level of the geometrical plane passing through the lower ends of the partition plates constituting each module of the partition plate. .

Always in accordance with the preferred form of embodiment, the tension-generating mechanisms at the ends, i.e. the tension-generating mechanisms that are connected only to the thin plates covering the molded partitions 5 of the dance hall, are fixed to these partitions and are geometrically They are located below the geometric plane, and these partition plates unfold according to this geometric plane.

Each tension-generating mechanism comprises a partition plate 28 with at least one upwardly projecting side plate 29 to which the watertight lamina of the molding element is secured along its entire length;
It is constituted by book tension spindles 30, each of which is fixed at one of its ends to a beam 28A fixed to the partition 28, and the spindles are each inserted into an opening in the base plate.
Below this base plate, a compression spring device 32 is connected in each case, which spring device is arranged around the spindle 30 and compresses between the base plate and the plate 33. The dish rests on the spindle and is axially attached thereto by a threadedly engaged nut 34 cut into the spindle.

When the tension generating mechanism is fixed to the truck, the washer of this mechanism becomes the base plate 14 of the truck, and two side plates are attached to the partition plate.

If the tension generating mechanism is fixed to one of the end partition plates, the partition plate 28 has only one side plate and the washer 31 has a side plate 35 fixed to this partition plate.

By moving the nut, the compression of the spring device is adjusted and as a result the value of the tensile force is exerted by the spindle.

Preferably, the compression spring device 32 is a spiral spring.

According to a preferred form of implementation, beam 28A is made of metal, square in shape, and has a straight cross section. This beam 2
8A is fixed by the screws of the temporary partition 28 and presses against the top surface of this partition plate.

In accordance with the always preferred form of implementation, the beam 28 is longer than the eight partition plates 28 and is connected with the partition plates both to the two spindles.

Advantageously, each watertight lamella 6 is connected to the side plate of each tension-generating mechanism by a quick clip system 36.

This quick clip system is known per se, but
It consists of two parts that are firmly connected to each other, and each is fixed by rivets to the watertight thin plate and the side plate of the washer.

Each of the two parts may include a number of regularly spaced hinges along its joining zone to the other part,3 between which the hinges of the other part are arranged in rows. It will be done.

A spindle, normally movable axially, is inserted into the hinge in such a way as to connect the two parts to each other.

It is understood that the invention is susceptible to all modifications and variations without departing from the scope of the invention.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional front view of a formwork according to the invention. FIG. 2 is an enlarged cross-sectional view of the molding element and the two carriages supporting it. FIG. 3 is an explanatory view of the arm length adjustment mechanism of each device that adjusts the inclination of the partition plate at the end of the formwork. FIG. 4 schematically shows a new form of embodiment of a telescoping arm for supporting the same molded module by two adjacent carts.
Société M, J, V, I. Anti-National Niss Aniel El Agent Patent Attorney Mamoru Suzuki Fig4

Claims (17)

[Claims] (1) comprises an underframe (1) on which rests, in particular, two longitudinally perpendicular partition plates (2) and a bottom (3) arranged between these two partition plates; The variable geometric profile of the planks complements the profile of the rows of treads and one or two landings of the staircase, the bottom (3) of the staircase being constituted by juxtaposed molded elements; These molded elements are juxtaposed in a dihedral manner projecting into the formwork, and are respectively dedicated to the production of the molded modules (4) of the combined treads and the landings at the top and bottom of the stairs. and includes two adjustable sloped end dividers (5) respectively connected to either module at the end of the molded modules of the row of treads, the features of which are as follows: Each molded element (4) or (5) is provided with a thin plate (4) which is flexible and watertight against the concrete and which covers the entire element
6) is combined, and the thin plate is placed on both of the elements, at least between the elements adjacent to this element, and both of the elements covered by the thin plate are placed in tension. Improved formwork for producing concrete parts, for example of stairs, which are joined by means of a giving device. (2) Each molding module is supported by two carriages, each carriage (2) supporting two adjacent molding elements, and two adjacent molding elements supported by watertight lamellas (6). 2. A formwork according to claim 1, further comprising a tensioning device connected to the formwork. (3) Each trolley (9) has a horizontal bail plate (14) with a rotating device (15) rotatably connected to the rail (10) and two adjacent molding elements respectively. comprising two supporting columns (16) projecting upwardly and resting on a base plate;
Between these columns a section of the belt (6) of two adjacent molding elements supported by these columns is arranged and connected to the same tensioning mechanism supported by a carriage. The formwork according to claim 1, characterized in that: (4) each tensioning mechanism comprises at least one upwardly projecting side plate (29) securing the watertight lamina of the molding element along its entire length; It is constituted by a partition plate (28) and at least two tension axles (30), each of which is firmly tied by one of its ends to a beam (28A) which is firmly connected to the partition plate (28). They are each inserted into a hole through the base plate, and below this base plate are each connected with a compression spring device (32), which spring device is arranged around the axle and connects the base plate and the plate. This plate-shaped body rests on the shaft and is attached to the spindle by means of a nut (34) which is engaged by screwing with a screw cut on the shaft. Formwork according to claim 1, characterized in that it is mounted in the direction. (5) Partition plates (28) for each tension mechanism fixed to the trolley
Claim characterized in that each side plate has two side plates to which the thin plates (6) of two adjacent elements are respectively fixed, and that the flat part of this tensioning mechanism is constituted by the trolley field base plate. Formwork in Section 4. (6) The partition plate (28) of each tensioning mechanism fixed to the partition plate (5) has only one side plate (29), and the base plate (31) of this mechanism is 5. The formwork according to claim 4, wherein the formwork is fixed to the partition plate. (7) Each lamina (6) is associated with a side plate of each tensioning mechanism, the lamina being connected to the side plate of the tensioning mechanism by a quick clip system (36). formwork. (8) Each molded module of the tread is constituted by two partition plates (11) and (12) of adjustable length, which are connected to each other along the edges of the dihedron they form. The pillars (16) of each truck (9) are connected to two partition plates adjacent to the two adjacent mold-in modules supported by this truck, and the mold-in modules are connected to each other. The two trolleys (9) supporting the same module have the same extendable and retractable mechanism (
13. Formwork according to claim 1, characterized in that they are connected to each other by means (13). (9) One of the two supports (16) of each carriage has a limited movement while rotating around a geometrical axis horizontal and parallel to the edge of each dihedron formed by each module of the molding. Formwork according to claim 1, characterized in that it rests on a base plate (14) so as to be able to do so. (10) One of the two modules of the end tread molding is fixed to an end structure (17) fixed to the trolley to lengthen the row of trolleys and also to Formwork according to claim 1, characterized in that the module is connected to a pushing and traction device (19) by an end carriage of the train of carriages on which it is placed. (11) Pushing/pulling device The device (19) is constituted by a structure (20) assembled above the formwork so as to be movable by engaging with the guide rail (21), and this structure includes: 11. Formwork according to claim 10, characterized in that it includes a motor arrangement which engages the rail (21) to ensure movement in one direction or the other. (12) One of the partition plates (5), which is assigned to the molding of one of the stair landings, is connected to the fixed structure (17), while the other partition plate is connected to the supports of the terminal trolley. 12. Formwork according to claim 1, characterized in that the carriage is a carriage connected to a movable structure (20) of a pushing and pulling device. (13) The formwork according to claim 1, wherein each partition plate is supported by an adjustment device for its inclination. (14) The device for adjusting the inclination of one of the partition plates (5) is supported by a movable structure (20), while the other partition plate is supported by the underframe of the formwork, and these devices 1, 11 or 12, each of which extends below the partition plate (5)
Formwork for any one of the following items. (15) Each device is fixed to the partition plate (5) on the one hand and to a part of the formwork that supports this device (underframe (1) or pedestal of the movable structure (20)) on the other hand through joints. an extensible device (22) comprising an actuating shaft (22) comprising at least two threaded portions;
One of the threads is cut according to the left-hand pitch, the other according to the right-hand pitch, and with each of them is engaged a bushing (24), which is fixed to the bushing and located oppositely along the diameter. Two arms (25) of equal length, arranged symmetrically with respect to the geometrical axis of the actuating shaft and oppositely with respect to the arms of the other bushings, are connected via the two points of the joint. The four arms are of the same length and are located on each side of this shaft and are part of the module (of the movable structure (20)) supporting the partition plate (5) and this adjustment device. Two shafts (26) parallel to the shaft rod (23) are each fixed to the base or frame (1) via the joints. The formwork according to claim 13, characterized in that: (16) At least one support rod (27) is connected to each telescoping device and connected by one of its ends to the actuating axle along the geometric axis of this axle. , and is connected by the other end of a support rod to the part of the formwork supporting the adjustment device (pedestal (20) or underframe), and this support rod is connected to the articulation of the partition plate (5). Formwork according to claim 15, characterized in that the geometrical axis of the joint is parallel to the geometrical axis of the joint. (17) The geometric axis of the articulation of the support rod (27) in the part of the formwork supporting the device for adjusting the inclination of the partition plate (5) The geometric axes of the articulation of this partition plate and the geometry of the articulation of the extensible device (22) in the part of the formwork [movable structure (20) or underframe (1)] supporting the adjustment device. 17. Formwork according to claim 16, characterized in that it is contained in a geometric plane containing the target axis.