EP1039060A2 - Procédé et système pour la fabrication de panneaux en forme de grille pour la construction des batiments - Google Patents
Procédé et système pour la fabrication de panneaux en forme de grille pour la construction des batiments Download PDFInfo
- Publication number
- EP1039060A2 EP1039060A2 EP99110462A EP99110462A EP1039060A2 EP 1039060 A2 EP1039060 A2 EP 1039060A2 EP 99110462 A EP99110462 A EP 99110462A EP 99110462 A EP99110462 A EP 99110462A EP 1039060 A2 EP1039060 A2 EP 1039060A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- cross
- net
- elements
- welding
- panel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
- E04C2/02—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials
- E04C2/04—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of concrete or other stone-like material; of asbestos cement; of cement and other mineral fibres
- E04C2/06—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of concrete or other stone-like material; of asbestos cement; of cement and other mineral fibres reinforced
Definitions
- the present invention relates to a method and system for making prefabricated structural grid-like panels for making buildings.
- the panels to which the invention relates comprise a substantially sandwich construction, constituted by two adjoining grid-like elements therebetween a thermally or acoustically insulating material thickness or cushion is arranged.
- a main drawback of such a prior panel is constituted by the very complex method for making said panels, which provides to form the panel construction directly as the cross wires are entrained through the thickness of the insulating material.
- said sheet nets tend to be deformed as the cross wires are fed, and, consequently, the wires themselves are located in offset positions.
- the wires which are usually provided in a high number (i.e. twenty) are frequently offset as they are caused to pass through the thickness of the insulating material, mainly due to a resistance of said insulating material to the penetration and sliding of the wire, in combination with a poor strength of said wire against to the operating stresses. Accordingly, said wires tend to be deformed, thereby their end portions are frequently offset from a proper arrangement at the welding points, as defined by the positions of the electrodes of the welding grippers. Thus, the strength of the panel will be weakened, specifically at the unwelded portions.
- the aim of the present invention is to provide a novel method and system for making prefabricated structural grid-like panels which method and system are much simpler and reliable than prior like methods and systems.
- a main object of the present invention is to provide such a method and system which are specifically designed to overcome the above mentioned drawbacks and, in particular, the drawback of an uneven welding of the cross members provided for cross connecting the mentioned net sheets.
- a further object of the present invention is to provide such a method and system allowing to fully overcome any offsets of the panel stiffening cross-elements, as well as the insulating material entrainment phenomena, susceptible to negatively affect a proper operation of the welding gripper electrodes.
- Yet another object of the present invention is to provide such a method and system adapted to make a grid-like panel devoid of any defects and having an even and homogeneous construction.
- the pre-arrangement of a preformed panel and the welding thereof at an operating stage following the preforming stage would allow to fully eliminate any possible portions of insulating material susceptible to be entrained by the panel stiffening cross-elements caused to pass through the insulating material.
- the assembling of the panel including stiffening cross-elements having stiffening properties much greater than those of simple rectilinear wires, would allow the net welding grippers to be easily centered, thereby overcoming any drawbacks related to an uneven welding of the net cross coupling elements.
- the panel made by the method and system according to the present invention is efficiently devoid of any unevenness in the arrangement of the stiffening cross-elements, is provided with very even net welding spots and, moreover, is devoid of any constructional defects.
- the invention would allow to easily make a standard panel having a width of 1,200 mm, and including 100 stiffening cross-elements for each m 2 of panel, by using, instead of 40 wire rolls and 20 welding units, as are necessary in the prior art, only 25 wire rolls and 10 welding units.
- the system shown in Figure 1 comprises a plurality of reels or bobbins 11 for supplying a corresponding number of longitudinal wires 1, to be used for making the panel forming nets.
- a welding station 12 is provided for welding the longitudinal wires 1, the cross-wires 2 supplied either by a reel 13 ( Figure 4) or a bar loader 14 ( Figure 1).
- a continuous net 3 is obtained, which is conveyed, in the direction of the arrow F2 of Figure 1, by a conveyor or feeding device 15.
- This feeding device 15 drives the net 3 to a forming station 16 for forming V-shaped cross-elements 5, specifically designed for cross stiffenings the panel being formed.
- the cross-elements 5 are made starting from corresponding wires 17, also supplied from the reels 11, and driven toward the station 16 and cut by a cutter 18 ( Figure 2), into rectilinear wire portions 4. Said wire portions 4 being successively bent in a bending station 16, by punch element 19 caused to be lowered on the wire portion 4, as indicated by the arrow F1 of Figure 2, and being counter-biassed by a tool 20 reproducing the V-shape to be imparted to the cross-element 5.
- the open end portions of the cross-element 5 are then caused to locate adjoining a corresponding longitudinal wire 1, to be welded on the latter by welding grippers 21 (see Figures 2 and 3).
- the system is supplied in the direction of the arrow F4 of Figures 5 and 6.
- the rollers 27 is accordingly rotatably driven in the clockwise direction, whereas the roller 28 is anticlockwise driven (see the arrows F5 and F6 of Figure 6, respectively).
- the cross-elements 5 are welded on the wires 1, in a position thereof bridging the crossings or "knots" with the cross wires 2, at an offset position from the net 3 longitudinal axis 25 ( Figure 4).
- the welding grippers 21 can moreover be driven either vertically toward or away from the wires 1, thereby allowing to perform a quick and easy welding operation while disengaging the net being formed to allow it to be driven step-by-step in the direction of the arrow F2.
- the net 3, including the cross-element 5 all arranged on a same side or face of said net, will be laterally trimmed by two cutting units 22 ( Figure 1), to remove any cross wire 2 projecting portions.
- FIG. 1 illustrates a automatic stacking device for automatically stacking the net sheets 6 and driving said stacked net sheets to the assembling station shown in Figure 5.
- Said assembly station is loaded by a bottom horizontal sheet 62 having the stiffening cross-elements 5 thereof facing upwardly, with a plate or layer of insulating material 7 arranged above the apex portions 31 of the cross-elements 5 of said net sheet 62, and with a top horizontal sheet 61 reversely arranged on the insulating layer 7, thereby arranging the stiffening cross-elements 5 thereof with the apex portions 31 abutting against the surface of said insulating layer 7 (see Figure 15).
- guiding elements 26 will drive the thus obtained assembly to an inter-space or gap between a pair of rollers 27 and 28, which can be vertically driven to be mutually moved toward one another or away from one another (see the arrows F3 of Figure 6).
- said rollers 27, 28 are moreover provided with toothed inserts 29, provided for engaging the net sheets 61 and 62.
- the rollers 27 and 28 are arranged spaced from one another, thereby allowing the sheets 61, 62 and layer 7 to be introduced into their gap 30. Then, said rollers will be driven toward one another ( Figure 6), thereby also causing the net sheets 61 and 62 to be mutually driven toward one another.
- the cross-elements 5 will be pressed so as to cause them to penetrate the insulating material 7 so as to bring the apex portions 31 of the cross-elements 5 of the bottom net sheet 62 to project from the top surface of said layer, at the height of a respective longitudinal wire 1 of the top net sheet 61 ( Figure 20).
- the pressing by the rollers 27, 28 will cause the apex portions 31 of the cross-elements of the top net sheet 61 to be downward driven, thereby projecting from the bottom side of the insulating layer 7, and at the longitudinal wires 1 of the net sheet 62.
- the rotary driving toward one another of said rollers 27, 28 will provide a preformed panel, having a substantially sandwich construction, and comprising the opposite net sheets 61 and 62, provided with respective stiffening cross-elements 5 fully entrained through the thickness of the insulating material or layer 7, so as to project therefrom for an amount required to engage the wires of the other net sheet.
- the welding station 34 is provided with welding grippers 35, arranged on both sides of the panel and designed for welding the apex portions 31 of the stiffening cross-elements 5 on the longitudinal wire 1 of the net sheet thereagainst said welding grippers are caused to abut.
- the welding grippers 35 as the mentioned grippers 21, can be vertically driven as shown by the arrows F7 and F8 of Figure 5.
- a structural grid-like panel 37 in a finished, welded and even arrangement is provided, said panel being driven step-by-step by a driving device 36 ( Figure 5).
- the panel 37 can be manually removed, or it can be automatically removed by an automatic removing and stacking system 38 ( Figure 8).
- the method carried out in the above disclosed system essentially comprises the following steps:
- a plurality of longitudinal wires 1 are supplied, and then cross-wires 2 are welded thereon, thereby forming a continuous net 3.
- the net 3 is cut into net sheets 6, having a set length, and bearing thereon the stiffening cross-elements 5 welded on the wires 1, on a same side of said sheets.
- the net sheets 6 are stacked with a separated arrangement.
- a sandwich arrangement is then formed, which comprises by arranging an insulating material layer 7 between two sheets 6, i.e. a top sheet 61 and a bottom sheet 62, each of one is reversed with respect to the other.
- rollers 27, 28 are driven toward one another and against the end portions of the net sheets 61, 62 being fed between the rollers. This driving of said rollers will cause the front end portions of the net sheets to be abutted against the insulating material or layer 7 with a consequent pressing and penetration of the corresponding cross-elements 5 through the thickness of the insulating layer or material.
- rollers 27 and 28 are rotatively driven in order to preform the overall panel, which is then fed into the interspace or gap between said rollers.
- This operation is carried out simultaneously with a calibration or setting of the spacing of the net sheets 61 and 62, thereby causing the apex portions 31 of the respective cross-elements 5 to perforate the thickness of the insulating material, to project from the opposite net, at a position suitable for welding ( Figure 20).
- the finished panel 37 is finally unloaded from the machine.
- the welding of the apex portions 31 of the cross-elements 5 of said panels is carried out in a separated unit which is separated from that making the preformed panel ( Figure 17).
- possible insulating material traces 7 entrained by the cross-elements 5 can be removed before welding.
- the panel making method could also provide to supply two continuous nets 6, instead of two separated net sheets 61 and 62.
- the method would cause the two nets 6 to continuously pass, in a mutual overlapped arrangement, respectively above and under the insulating material layers 7, between the rollers 27 and 28.
- Said rollers in particular, could also be replaced by other suitable pressing elements, of a not rotary type (for example movable plates).
- the cutting of the nets to provide the panels having a set length would be performed after the welding of the nets, at their cross-elements.
- all the disclosed apparatus could be replaced by other devices having a like operation, and specifically designed to provide a panel having the claimed features.
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Wire Processing (AREA)
- Rod-Shaped Construction Members (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ITMI990620 | 1999-03-25 | ||
| ITMI990620 IT1312155B1 (it) | 1999-03-25 | 1999-03-25 | Procedimento e impianto per la realizzazione di pannelli reticolaristrutturali prefabbricati per la costruzione di edifici |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1039060A2 true EP1039060A2 (fr) | 2000-09-27 |
| EP1039060A3 EP1039060A3 (fr) | 2003-01-29 |
Family
ID=11382448
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP99110462A Withdrawn EP1039060A3 (fr) | 1999-03-25 | 1999-05-31 | Procédé et système pour la fabrication de panneaux en forme de grille pour la construction des batiments |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP1039060A3 (fr) |
| IT (1) | IT1312155B1 (fr) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114012319B (zh) * | 2021-11-19 | 2024-05-10 | 中国人民解放军陆军工程大学 | 一种焊接笔 |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0291531A4 (fr) * | 1986-11-23 | 1989-03-14 | Maramar C A Corp | Panneau de construction. |
| IT1289898B1 (it) * | 1997-01-15 | 1998-10-19 | Froma S R L | Pannello strutturale prefabbricato per la costruzione di edifici per uso civile o industriale |
-
1999
- 1999-03-25 IT ITMI990620 patent/IT1312155B1/it active
- 1999-05-31 EP EP99110462A patent/EP1039060A3/fr not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| ITMI990620A1 (it) | 2000-09-25 |
| EP1039060A3 (fr) | 2003-01-29 |
| IT1312155B1 (it) | 2002-04-09 |
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