Classifications

• • E—FIXED CONSTRUCTIONS
  • E04—BUILDING
  • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
  • E04B2/00—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
  • E04B2/84—Walls made by casting, pouring, or tamping in situ
  • E04B2/86—Walls made by casting, pouring, or tamping in situ made in permanent forms
  • E04B2/8658—Walls made by casting, pouring, or tamping in situ made in permanent forms using wire netting, a lattice or the like as form leaves

Definitions

• the present invention relates to a continuous manufacturing process for formwork walls for buildings. It also relates to a production line for implementing such a process.
• These forms include for example two walls each consisting of a plague of expanded metal reinforced by stiffeners extending along the length of the plague.
• the walls are connected to each other by spacers.
• the respective lengths thereof do not generally correspond to the desired final length for the walls, which can vary very significantly depending on the orders. It is therefore necessary to put the right lengths on the one hand and the stiffeners on the other. The stiffeners are then fixed on the plates to constitute the walls.
• the present invention aims to remedy these drawbacks by proposing a method of manufacturing formwork walls which allows jointly reduce the manufacturing time of these and cancel the loss of materials due to falls.
• the present invention therefore relates to a method of manufacturing formwork walls for buildings, each wall comprising a plate and at least one stiffener fixed to the plate.
• the method is characterized in that it allows continuous manufacturing and comprises the successive stages consisting in:
• the composite mat is therefore formed continuously whatever the lengths of the plates and of the initial stiffeners and of the planned final walls. It is only then that the carpet is cut at predetermined intervals depending on the length of the walls.
• the plates and the stiffeners being assembled respectively end to end whatever their length, no loss of material is to be deplored.
• the stiffeners are of substantially constant length and the composite belt comprises at least two rows of stiffeners, at least a first and a second row are offset between them longitudinally so that the ends of the stiffeners in the first row are not aligned with the ends of the stiffeners in the second row.
• the ends of the stiffeners of the first row are substantially aligned with the central part of the stiffeners of the second row.
• This version further improves the effects of the previous version.
• this version guarantees a maximum rigidity at the walls coming from the mat, preventing any risk of having the junctions of the stiffening lines in the vicinity of one another.
• the ends of the stiffeners of the rows form a "V" oriented substantially in the longitudinal direction of the carpet.
• This version also makes it possible to obtain maximum rigidity if the belt has at least three rows of stiffeners. Indeed, it makes it possible to prevent the occurrence of an oblique or perpendicular alignment to the width of the belt of the ends of the stiffeners.
• the stiffeners to be fixed on the mat all have the same length. Indeed, the aforementioned ends and central parts do not need to be perfectly aligned to obtain satisfactory mechanical properties.
• the length of the stiffeners being provided with a certain tolerance (for example for a nominal length of 5400 millimeters, the effective length can vary randomly between 5370 and 5430 millimeters), the arrangement of the stiffeners in a random order on the carpet compensates for these differences in length.
• the present invention also relates to a production line for formwork walls for buildings, each wall comprising a plate and at least one stiffener fixed to the plate.
• the chain is characterized in that the chain is a continuous production line and comprises means for assembling the plates together edge by edge one after the other in order to constitute a continuous belt, means for fixing the stiffeners on the belt so that the stiffeners are aligned end to end butt on the carpet in at least one file, and means for cutting at intervals of predetermined lengths of the composite carpet thus produced.
• the chain comprises means for scrolling the carpet thus formed, parallel to its longitudinal direction.
• This version authorizes to provide the chain with fixed stations to carry out the steps of the aforementioned process.
• the means for arranging the stiffeners comprise a magazine comprising stiffeners, this magazine being located above the moving belt.
• the magazine is located at a level higher than the carpet, vertically thereof, other elements or machines that can be interposed between the magazine and the carpet.
• the store can be placed immediately above the carpet so as to be able to deliver the stiffeners directly to the carpet.
• a member such as a conventional conveyor belt in order to route the stiffeners above the plate carpet in order to fix them there at a post further down the chain.
• This store allows the stiffeners to be placed directly on the belt as it advances, by releasing the stiffeners.
• Several stores can be arranged to generate the respective lines of stiffeners.
• FIG. 1 is a perspective view of a formwork wall produced with the method according to one invention
• FIG. 2a and 2b are elevational views of the first and second half of the production line according to the invention, respectively;
• FIG. 3 is a very enlarged plan view of a sample of expanded metal plate;
• - Figure 4 is a plan view of the composite mat;
• FIG. 5 is an elevational view along the axis of the stiffeners of three stiffener stores
• FIG. 6 is a perspective view of the tool for stapling the metal plates together; and
• FIG. 7 is a perspective view showing the stapling of a stiffener on an expanded metal plate.
• the present description relates to an embodiment of the process according to the invention and to a production line allowing the implementation of this process.
• the wall 1 comprises a plate 2 and at least one stiffener fixed to the plate.
• the wall 1 here comprises six stiffeners 3 arranged parallel to the longitudinal direction of the wall 1 and regularly spaced along the width thereof.
• the plates 2 are made of expanded metal, a sample of which is presented in FIG. 3. the plates 2 have, spaced at regular intervals, parallel "V" ribs 8 which increase the rigidity of the plate in the direction of the ribs 8
• the ribs 8 are all directed towards the same side of the plate 2.
• the stiffeners are made of bent metal.
• Such walls 1 are used in particular in the lost formwork for concrete described in French patent applications Nos. 91 13192 and 92 07042. We will refer to these two applications for more details on the constitution and use of the walls 1.
• the process according to the invention allows the production of the walls 1.
• the chain allowing the implementation of this process is a continuous production line.
• the method comprises the first step consisting in assembling plates of given lengths edge to edge one after the other in order to constitute a continuous mat.
• plates 5 for example received from the supplier, are stored upstream of the chain and stacked at the disposal of an operator 6 or for their installation by automatic means.
• the chain comprises means for assembling the plates together edge to edge one after the other in order to constitute a continuous belt.
• These means include means for assembling the plates 5 by crimping.
• the operator 6 feeds the crimper 7 with plates 5 in order to assemble the plates together end to end in the direction orthogonal to the ribs 8:
• the respective edges of the plates 5 are arranged so as to coincide two respective ribs 8 of each plate, the rib of one plate overlapping in overlap with the rib of the other plate in a male-female association resulting in only a small thickness, the downstream plate being above the upstream plate.
• the edges of the plates are assembled by crimping at several points of the double rib thus created.
• the crimper 7 comprises several tools similar to tool 9 shown schematically in Figure 6, these tools being aligned parallel to the ribs 8, that is to say orthogonally to the plane of Figure 2a.
• the tool 9 comprises a first matrix 10a which is fixed. This matrix comprises on its horizontal face 11a a projection 14 which has a hollow "V" shape.
• the tool 9 comprises a second matrix 10b placed above the matrix 10a and movable vertically relative to the latter, by means of conventional actuation and guidance means not shown.
• the matrix 10b has on its horizontal face 11b opposite the face 11a of the matrix 10a a hollow relief comprising a slot 12 constituting a housing for receiving the aforementioned double rib and a groove 13 orthogonal to the slot 12 and sparing the space required for the size of the projection 14 when the two dies are in contact with one another.
• the crimper then lowers the dies 10b of the respective tools, trapping the double rib in the slot 12. A point of the double rib is compressed and pinched in the projection 14 thanks to its sides in " V ", which pinch the two edges of the rib. This produces a punctual crimping of the plates.
• the number of crimping points is equal to the number of tools 9 in the crimper 7.
• the chain comprises means for scrolling the plate mat 19 thus formed. parallel to its longitudinal direction which here corresponds to the direction orthogonal to the ribs 8.
• the belt is moved downstream of the chain by suitable motorized toothed wheels 15a, 15b and 15c. In FIG. 2a, the belt descends vertically at the outlet of the crimper, then follows a path parallel to the ground before its ascent for fixing the stiffeners.
• the carpet is therefore formed by fixing the plates one after the other.
• the next step in the process consists in aligning and fixing end to end stiffeners 18 of given lengths in at least one row on the mat.
• the length of the stiffeners 18 is possibly different from the length ⁇ ._is plates 5 to which the stiffeners will be assembled.
• the manufacturing chain comprises means for placing the stiffeners 18 in at least one file on the belt 19.
• these means here comprise six magazines 20 comprising stiffeners 18.
• the magazines 20 are located parallel to - side above the moving belt 19. They are all six oriented along the direct: - ⁇ longitudinal of the belt 19, in order to allow the arrangement of the stiffeners substantially according to the orientation of their position of attachment to the belt 19.
• the stores 20 consist of vertical rods 50 which hold the stiffeners 18 in a vertical stack.
• Each magazine 20 includes a stack of stiffeners 18, released successively from magazine 20 in the lower part
• This part 21 is associated with two devices 23a and 23b controlling the descent of the stiffeners and releasing a stiffener under the control of an operator 22 who supervises the arrangement of the stiffeners on the taDis.
• the operator 22 is located on a platform above the moving belt 19. He orders the release of the stiffeners in each store in order to form groups of stiffeners.
• a suitable conveyor belt 25 the stiffeners thus released are routed parallel to each other downstream of the chain.
• the belt 25 takes the stiffeners towards the rest of the chain.
• Guide rails not shown, make it possible to maintain the orientation of the stiffeners parallel to the longitudinal direction of the belt.
• the operator 22 could be replaced by automatic means for placing the stiffeners on the belt according to the desired configuration.
• the manufacturing process then comprises the step consisting in fixing the stiffeners 18 to the belt 19. This fixing can be carried out by stapling the stiffeners to the carpet 19.
• the stapling operation of the stiffeners comprises a first step consisting in cutting legs 28 by punching on one face 27 of the stiffeners 21.
• the result of the stapling operation is shown in FIG. 7.
• the punching consists in partially cutting by means of a conventional cutting die adapted the elongated legs 28 which will then be in a second step folded vertically to attach the stiffeners 21 to a rib 8 of the mat 19.
• the carpet 1 - ⁇ then goes up using the wheels 29a and 29b up to the level of the stiffeners 21 so that the stiffeners are deposited on the belt just before the entry of the carpet 19 and the stiffeners 21 into the stapling machine 30 which here constitutes the means for fixing the stiffeners to the carpet.
• a composite mat 31 is thus obtained at the outlet of the stapling machine.
• the stiffeners are arranged substantially in the longitudinal direction of the belt, the stiffeners being of substantially constant length.
• the composite mat 31 comprises six rows of stiffeners.
• the operator 22 arranges the stiffeners delivered on the conveyor belt 25 so as to form rows offset between them longitudinally so that the ends (34) of the stiffeners of the rows form a "V" oriented substantially in the longitudinal direction of the belt, as this is shown in Figure 3.
• the composite carpet included only two rows of stiffeners, it suffices to arrange the stiffeners so that the ends of the racks ?? sseurs of the first row are not aligned with the ends of the stiffeners in the second row. In other words, the ends of the stiffeners in the first row are substantially aligned with the central part of the stiffeners in the second row.
• the wall 1 produced has three junctions 32 between stiffeners of the same group of lines.
• the second step of stapling takes place in the machine 30 where the tabs 28 are folded into the openings of the perforated plates, as indicated above.
• the stiffeners are thus fixed in line on the mat of plates.
• the next step in the manufacturing process consists in cutting the composite carpet thus formed at intervals of predetermined lengths to constitute the walls 1 shown in FIG. 1.
• the length of the intervals is different from the respective length of the plates 5 and stiffeners 18, which makes the method according to the invention particularly advantageous.
• the cutting of the carpet is carried out by means of a suitable conventional sawing bench 40.
• the carpet is stopped at each cutting to obtain a cutting of the carpet orthogonal to its longitudinal direction.
• the blade simultaneously cuts the plate and the stiffeners.
• the walls are delivered at the outlet of this bench 40.
• the production line can then be extended to carry out the manufacture of the formwork proper or to carry out certain additional processing or assembly operations on the walls 1.

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• Engineering & Computer Science (AREA)
• Architecture (AREA)
• Physics & Mathematics (AREA)
• Electromagnetism (AREA)
• Civil Engineering (AREA)
• Structural Engineering (AREA)
• Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)

Applications Claiming Priority (3)

Publications (1)

Family

ID=9452420

Family Applications (1)

Country Status (4)

Families Citing this family (4)

Family Cites Families (3)

• 1993
  • 1993-11-02 FR FR9313017A patent/FR2712016B1/fr not_active Expired - Fee Related
• 1994
  • 1994-11-01 AU AU78608/94A patent/AU7860894A/en not_active Abandoned
  • 1994-11-01 EP EP94929613A patent/EP0726990A1/de not_active Ceased
  • 1994-11-01 WO PCT/IB1994/000335 patent/WO1995012719A1/fr not_active Application Discontinuation

Non-Patent Citations (1)

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