FR2926483A1 - MOLDING BENCH FOR MANUFACTURING LINEAR ELEMENTS, IN PARTICULAR CONCRETE - Google Patents

Abstract

The present invention relates to a molding bench (1) having parallel cavities (4) extending over a predefined length arranged to be able to manufacture the linear elements in series of parallel elements and in the axial extension of each other. It is characterized in that it comprises a frame (2) adapted to receive a continuous mold (3) consisting of several molding modules (30) comprising said indentations (4), these molding modules (30) being assembled end to end end by integrated engagement means and associated fastening means, arranged to ensure the alignment and straightness of said indentations (4) over the entire length of said molding bench (1).

Description

MOLDING BENCH FOR MANUFACTURING LINEAR ELEMENTS, IN PARTICULAR CONCRETE

Technical Field: The present invention relates to a molding bench for manufacturing linear elements including concrete, the molding bench having parallel impressions extending over a predefined length and arranged to be able to manufacture said linear elements by a series of parallel elements and in the axial extension of each other.

Prior art:

The molding benches make it possible in particular to manufacture linear structural elements such as beams or beams, concrete or the like, armed or not, and prestressed or not. The current molding benches have a length greater than 15 or 20 meters and consist of several modules juxtaposed to allow to stretch cables or steel prestressing bars over the entire length of the molding bench. These modules have for example a length of between 15 and 20 meters and the number of these juxtaposed modules is not limited. In the present art, each module is independent and must be individually fixed to the ground by sealing into specific foundations. In addition, each module is separated from the next by an interval. The fact that the molding bench is discontinuous poses a constraint in the organization of the production of beams of different lengths in particular to optimize the filling of the molding bench. In addition, the pouring of the concrete is complicated because of the passage of the existing intervals between consecutive modules. These intervals receive concrete residues and are difficult to clean.

Presentation of the invention

The present invention aims at overcoming these drawbacks by proposing a continuous, gap-free molding bench whose implementation of the bench is greatly simplified, making it possible to optimize the production of the beams of different lengths, while ensuring the qualities of alignment. and straightness necessary for a good operation of this type of installation.

For this purpose, the invention relates to a molding bench of the kind indicated in the preamble, characterized in that it comprises a frame adapted to receive a continuous mold consisting of a plurality of molding modules comprising said parallel impressions, these molding modules being assembled end-to-end and arranged to ensure the alignment and straightness of said indentations along the entire length of said molding bench.

In a preferred embodiment, the molding modules are assembled end-to-end by integrated engagement means associated with fastening means.

These integrated engagement means may comprise at the ends of the molding modules respectively a complementary male part and a female part, the female part consisting of the external surface of the side walls and the bottom of the indentations and the male part comprising centering parts. extending said side walls and the bottom of the footprints.

The fastening means may comprise at the ends of the molding modules complementary lateral flanges adapted to receive fixing members. In the preferred embodiment, each molding module has sleepers arranged to stiffen the module, support the impressions and ensure their alignment and straightness over the length of the module.

The junction zone between the consecutive molding modules may advantageously be covered with a cold weld bead.

The molding modules preferably have a width that allows them to fit into said frame.

In the preferred embodiment, the continuous mold is locked relative to the frame at a fixed point, for example located at one end of the molding bench, this fixed point comprising a protruding blocking piece provided on the frame or the corresponding molding module. and a housing provided on the molding module or the frame, said housing being adapted to receive said protruding blocking piece with a minimum clearance.

If the molding bench is equipped with means for preloading cables extending along the said bench and comprising a fixed trimmers at one end of the bench and a movable trunking at the other end of the bench, the fixed point is preferably located on the side of the fixed head.

The frame may also consist of frame modules assembled end to end and arranged to ensure the alignment of the modules over the entire length of the molding bench.

In the preferred embodiment, the frame modules are assembled by fastening means comprising at the ends of the frame modules complementary lateral flanges adapted to receive fasteners, and the fixed head is attached directly to the side flanges of said frame.

Brief description of the drawings: The present invention and its advantages will appear better in the following description of an embodiment given by way of non-limiting example, with reference to the appended drawings, in which:

FIG. 1 is a view from above of a molding bench according to the invention, FIG. 2 is an end view of the molding bench of FIG. 1, FIG. 3 is a longitudinal sectional view along the axis. III-III of the molding bench of FIG. 2, FIG. 4 is an enlarged view of the detail IV of FIG. 3, FIG. 5 is an enlarged view of the detail V of FIG. 3, FIG. 6 is a partial view. in perspective from below one side of a molding module showing the interlocking male part, FIG. 7 is a partial perspective view from below of the other side of a molding module showing the female part of 8A and 8B are partial views in longitudinal section of two molding modules respectively before and after interlocking of the male and female parts, FIG. 9 is a perspective view of the chassis of the molding bench of FIG. 1, FIG. 10 is an end view of the frame of FIG. 9, and FIG. partial view in longitudinal section of the frame of FIG. 9.

Illustrations of the invention and a better way to carry it out: With reference to FIGS. 1 and 2, the molding bench 1 according to the invention comprises a frame 2 supporting a continuous mold 3 in which parallel impressions 4 are formed, for example T-shaped, for the manufacture of linear elements (not shown) used in particular for the construction of buildings, such as beams, beams, concrete or the like, armed or not, with prestressing cables or not. This molding bench 1 has a length greater than 20 meters and for example a length of 60 to 100 meters allowing the simultaneous manufacture of several series of parallel linear elements and in the axial extension of each other.

Referring more particularly to FIGS. 6 to 8, the continuous mold 3 consists of several molding modules 30, comprising said indentations 4, which are fitted end-to-end and adapted to guarantee the continuity of the imprints 4 over the entire length of the bench. molding 1 as well as their alignment and straightness. These molding modules 30 may be identical or different, of the same length or not.

In the example shown, the assembly of these molding modules 30 is provided by integrated nesting means and associated with fixing means. Any other method of assembly by patches or the like may be suitable.

In this example, the integrated nesting means comprise at the ends of the molding modules 30 respectively a male portion 31 and a female portion 32 complementary, forming a male / female sheath system that ensures perfect alignment right fitting. The female part 32 is constituted by the outer surface of the side walls 40 and the bottom 41 of said indentations 4 and the male part 31 comprises centering pieces 33, 34 extending said side walls 40 and the bottom 41 of said indentations. example shown, these centering pieces are formed by plates 33 backed to the side walls 40 and a square section 34 backed to the bottom 41, these parts being fixed by a weld seam 35 or any other equivalent means. These centering pieces 33, 34 may have any other suitable form. Similarly, the male / female sheath system may have a different design depending on the shape of the fingerprints 4, the essential is to ensure a perfect alignment to the right of the fitting.

In the example shown, the fastening means comprise at the ends of the molding modules 30 complementary lateral flanges 36 adapted to receive fixing members (not shown) such as bolts or the like, through orifices 37 provided for this purpose. . Any other equivalent attachment means is also conceivable provided that it is removable.

Each molding module 30 consists of a metal structure formed in particular of two longitudinal members 38b assembled to sleepers 38 distributed over the length of the module to ensure the parallelism of the longitudinal members 38b and the mechanical rigidity of the module 30. The cross members 38a extend along the entire width of the module and are provided with cutouts corresponding to the fingerprints 4. These sleepers 38a form templates to support the fingerprints 4 by ensuring their alignment and straightness over the entire length of the module 30. These sleepers 38a can be perforated by orifices 39 for the passage of electrical resistances (not shown) for heating the mold and setting the concrete. Any other equivalent form of construction may also be suitable.

After assembly of the molding modules 30, their connection or junction zone 42 (see FIG 8B) can be covered with a cold weld bead (not shown) to smooth this junction area. This cold welding technique is advantageous because it does not involve any deformation of the material that may impair the straightness of the imprints 4.

Referring more particularly to Figures 9 to 11, the frame 2 of the molding bench 1 consists of several frame modules 20 assembled end to end to ensure the alignment of said modules 20 over the entire length of the molding bench 1. These modules frame 20 may be identical or not, of the same length or not, of the same length as the molding modules 30 or not.

In the example shown, the assembly of the frame modules 20 is provided by fastening means comprising, at the ends of the frame modules 20, complementary lateral flanges 21 capable of receiving fastening members (not shown) such as bolts or Similar to ports 22. Any other method of assembly is possible. Each frame module 20 comprises a metal structure formed in particular of two longitudinal members 23 assembled to sleepers 24 distributed along their length to ensure the parallelism of the longitudinal members and the mechanical rigidity of the frame 2. Any other equivalent form of construction may also be suitable. These sleepers 24 carry dampers 25 in the form of silentblocs or the like, able to support the molding modules 30, in particular at the right of the longitudinal members 38b. These dampers 25 have the function of separating the continuous mold 3 from the chassis 2 during the vibrating of the concrete after pouring.

The construction of the frame 2 delimits an interior volume adapted to receive the continuous mold 3 by interlocking, the internal width L between the longitudinal members 23 being substantially equal to the width of the molding modules 30 to block them transversely.

Referring more particularly to Figures 3 to 5, the frame 2 can rest on the ground on a concrete slab 5 for example, and can be fixed by fastening tabs (not shown) reported, resting on a frame edge and screwed in the slab, or by any other equivalent means. The continuous mold 3 is in turn locked relative to the frame 2 to prevent slippage at the release of the preload, as explained below, this blocking being located preferably at a fixed point. In the illustrated example, this fixed point consists of a protruding blocking piece 26 provided on the frame 2 and a housing 27 provided on the corresponding molding module 30, the housing 27 being able to receive the blocking piece. 26 with a minimum game. The reverse configuration, that is to say the locking piece 26 on the molding module 30 and the housing 27 on the frame 2 is also possible. This fixed point is preferably located at one end of the molding bench 1.

This type of molding bench 1 may be equipped with prestressing means (not shown) of cables which extend all along the molding bench 1 inside the cavities 4. These prestressing means comprise in known manner a fixed trimmer disposed at one end of the bench and a movable trimmer disposed at the other end of the bench, to which the prestressing cables are fixed. In this configuration, the fixed point is preferably located on the side of the fixed header, more precisely in the first molding module 30, in order to constrain the molding modules 30 towards the fixed header when releasing the prestress, avoiding thus any risk of dislocation of the modules. Still in this configuration, the fixed trimmer is preferably fixed directly to the frame 2 via the side flanges 21 left and right. This method of assembly allows the resumption of prestressing forces in the longitudinal members 23 of the frame 2 and to eliminate the ground fixing of the fixed head.

Possibilities of industrial application: The molding bench 1 as described is conventionally designed in parts, profiles and metal sheets assembled in particular by welding or the like. Its modular and removable design allows it to be easily and quickly set up on an industrial site without the need for major works. Once assembled, it is operational and allows the manufacture of linear elements such as beams or beams or the like, by positioning combs at predetermined intervals in the continuous mold 3 to delimit the length of said elements, these lengths being different from one series to another. The series of linear elements can succeed one another inside the continuous mold 3, without loss of volume, by optimizing the filling of the imprints 4 over the entire length of the bench, unlike the molds of the prior art.

It is clear from this description that the invention achieves all the goals. As just demonstrated, the fact of having a molding bench 1 in one piece optimizes the distribution of linear elements to manufacture. The fact of no longer having discontinuous and separated modules facilitates the pouring of concrete and eliminates the cleaning operations between the modules. The choice of the fixing point of the continuous mold 3 with respect to the frame 2 makes it possible to distribute to a certain extent the expansions of the molding modules 30 on either side of the fixed point, while forcing the molding modules 30 to slide towards this fixed point, which avoids any risk of disengagement of the modules between them, without soliciting cold soldering whose role is to seal the junction area 42 between the molding modules 30 to join them.

The present invention is not limited to the embodiment described but extends to any modification and variation obvious to a person skilled in the art while remaining within the scope of protection defined in the appended claims.

Claims (15)

claims 1. Bench (1) for manufacturing linear elements including concrete, the molding bench having parallel impressions (4) extending over a predefined length arranged to be able to manufacture said linear elements by a series of parallel elements and in the axial extension of each other, characterized in that it comprises a frame (2) adapted to receive a continuous mold (3) consisting of several molding modules (30) having said recesses (4) parallel, these molding modules (30) being assembled end to end and arranged to ensure the alignment and straightness of said indentations (4) over the entire length of said molding bench (1). 2. Molding bench according to claim 1, characterized in that said molding modules (30) are assembled end to end by integrated engagement means and associated with fixing means. 3. Bench of molding according to claim 2, characterized in that said integrated engagement means comprise at the ends of the molding modules (30) respectively a male portion (31) and a female part (32) complementary. Molding bench according to claim 3, characterized in that the female part (32) consists of the outer surface of the side walls (40) and the bottom (41) of said indentations (4) and the male part (31). comprises centering pieces (33, 34) extending said side walls (40) and the bottom (41) of said indentations (4). 5. Bench of molding according to claim 2, characterized in that said fixing means comprise at the ends of the molding modules (30) complementary lateral flanges (36) adapted to receive fasteners. 10 25 6. Bench of molding according to claim 1, characterized in that each molding module (30) comprises crosspieces (38a) arranged to stiffen said module, support said indentations (4) and ensure their alignment and straightness along the length of said module. 7. Bench according to claim 1, characterized in that the junction zone (42) between the consecutive molding modules (30) is covered with a cold weld bead. 10 8. Bench according to claim 1, characterized in that said molding modules (30) have a width adapted to fit into said frame (2). Molding bench according to claim 1, characterized in that said continuous mold (3) is locked with respect to said frame (2) at a fixed point. 15 10. Bench according to claim 9, characterized in that said fixed point comprises a protruding locking piece (26) provided on the frame (2) or the corresponding molding module (30) and a housing (27) provided on the molding module (30) or the frame (2), said housing (27) being adapted to receive said protruding blocking piece (26) with a minimum clearance. Molding bench according to claim 9, characterized in that said fixed point (26, 27) is located at one end of said molding bench (1). 25 12. The molding bench according to claim 11, this bench being equipped with cable prestressing means extending along said bench and comprising a fixed head at one end of the bench and a movable head at the other end of the bench. bench, characterized in that said fixed point (26, 27) is located on the side of said fixed headdress. Molding bench according to claim 12, characterized in that said frame (2) consists of frame modules (20) assembled end to end and arranged to ensure the alignment of said modules (20) over the entire length of said bench. molding (1). Molding bench according to Claim 13, characterized in that the said frame modules (20) are assembled by fastening means comprising, at the ends of the frame modules (20), complementary lateral flanges (21) capable of receiving members of fixation. 15. Bench according to claim 14, characterized in that said trimmers are attached directly to the side flanges (21) of said frame (2).