ES2395070B1 - Formwork panel - Google Patents

Abstract

Formwork panel comprising two parallel flat faces (3) suitable for defining a formwork face that is in contact with the concrete. It also comprises a hollow interior space defined between the two flat faces 3 and stiffening means necessary for the formwork panel 1 to support the working pressure during the concrete setting process. The formwork panel 1 also comprises two semipanels 5 facing and coupled to each other, defining the hollow interior space. Each half-panel 5 comprises one of said flat faces 3 and the stiffening means are integrated in at least one of said half-panels 5.

Description

Formwork panel

SECTOR OF THE TECHNIQUE

The present invention relates to formwork panels intended in particular to be used in the concrete construction industry.

PREVIOUS STATE OF THE TECHNIQUE

Traditionally in the construction industry, wooden planks have been used for wall and floor formwork. Said planks are of a considerable thickness and weight, so that said planks have evolved to achieve lighter panels, such as the so-called "sandwich" panels. In sandwich panels, a core of considerable thickness of a low strength material is inserted between two thinner rigid plates.

Composite formwork panels are also known and have stiffening means incorporated.

Thus, ES2198391 T3 (EP1118735 A1) discloses a monobloc formwork panel of composite material that has two parallel flat faces joined and stiffened by solidarity cross-members.

EXHIBITION OF THE INVENTION

The object of the invention is to provide a formwork panel as described in the claims.

The formwork panel of the invention comprises two parallel flat faces suitable for defining a formwork face that is in contact with the concrete. It also comprises a hollow interior space defined between the two flat faces and stiffening means necessary for the formwork panel to support the working pressure during the concrete setting process.

The formwork panel of the invention also comprises two semipanels facing and coupled to each other defining the hollow interior space. Each half-panel comprises one of said flat faces and the stiffening means are integrated in at least one of said half-panels.

With the formwork panel of the invention it is possible to reduce the weight of the formwork panel and increase the rigidity thereof, contributing to achieve a simpler and cheaper manufacturing process.

These and other advantages and features of the invention will become apparent in view of the figures and the detailed description of the invention.

DESCRIPTION OF THE DRAWINGS

FIG. 1 shows a perspective view of an embodiment of the formwork panel according to the invention with corner reinforcements.

FIG. 2 shows a partial perspective view of a semipanel of the formwork panel of Fig. 1.

FIG. 3 shows an exploded view of the formwork panel of Fig. 1 with the corner reinforcements.

FIG. 4 shows a view according to section IV-IV of the formwork panel of Fig. 1 with the corner reinforcements.

DETAILED EXHIBITION OF THE INVENTION

The formwork panel of the invention, as shown in Figure 1, comprises two parallel flat faces 3 suitable for defining a formwork face that is in contact with the concrete. It also comprises a hollow interior space 4 defined between the two flat faces 3 and stiffening means 2 necessary for the formwork panel 1 to support the working pressure during the concrete setting process.

As can be seen in figure 3, the formwork panel 1 of the invention also comprises two semi-panels 5 facing and coupled together, defining the hollow interior space 4, as seen in figure 4. In figure 2 one of the two half-panels 5 is shown. Each half-panel 5 comprises one of said flat faces 3 and the stiffening means 2 are integrated in at least one of said half-panels 5.

The formwork panel 1 of the invention is suitable for working in a work together with a plurality of formwork panels 1 that are joined together with fixing means not shown in the figures. In each use, the formwork face that is in contact with the concrete can be one of the two flat faces 3. In this way, the life cycle of the panel is doubled since in each use, the formwork face will be interchangeably a flat face 3 or the other. Likewise, the surface finish of the concrete formwork that is achieved with the formwork panel 1 of the invention is very good, and subsequent touch-ups are unnecessary.

In the preferred embodiment of the invention, the formwork panel 1 is made of plastic, preferably composite, such as thermoplastic or thermosetting, which notably favors the removal of the panel 1 once the concrete has set. Likewise, the flat faces 3 of the formwork panel 1, as its name indicates, are substantially flat which, is also especially advantageous in the formwork process because the concrete does not adhere to the formwork face and is easy to clean. Therefore, in the formwork panel 1 of the invention it is not necessary to use products, such as oils, formwork, and taking into account that the panel 1 is recyclable, it contributes to the care of the environment.

With the formwork panel 1 of the invention, since it is of a light material (plastic) and when it comprises the hollow interior space 4 (panel with lightened air chamber) reinforced with the stiffening means 2, the weight can be reduced considerably Total panel 1 without sacrificing the rigidity of the panel, achieving a light and resistant panel 1 at the same time, which is especially advantageous for handling the panels, thus contributing to improve the ergonomics of the posts and to avoid injuries or back contractures , neck, etc ... due to bad manipulation.

In the preferred embodiment, as shown in Figure 2, the stiffening means 2 comprise ribs 6 substantially perpendicular to the flat faces 3, where preferably said ribs 6 are arranged longitudinally. The stiffening means 2 also comprise channels 7 in which the ribs 6 of the opposite semipanel 5 are housed.

In said preferred embodiment, the formwork panel 1, as shown in Figure 2, also comprises additional ribs 8 arranged transversely but could be dispensed with.

In the preferred embodiment, the two half-panels 5 are substantially the same. In this way, manufacturing costs are considerably reduced because the manufacturing molds are unified and simplified. It is not necessary to have two different molds to obtain each semipanel 5 and when constructing the formwork panel 1 from two semipanels the design of the mold is simpler and cheaper. Being the simplest manufacturing molds, breakdowns are also reduced contributing to cost reduction.

Likewise, in a simple and economical way, starting from the same mold and using different materials, formwork panels with different mechanical properties can be obtained, thus adjusting to the different needs of the customers.

In a second embodiment not shown in the figures, the channels 7 are present in one of the semipanels 5 while the ribs 6 are present in the opposite semipanel 5. This embodiment is a variant of the stiffening means 2 where the two half-panels 5 do not have to be the same. Other configurations are also feasible.

In the preferred embodiment, the ribs 6 comprise an evacuation means 9, preferably in the form of a groove as shown in Figure 2, to facilitate the evacuation of the water that the formwork panel could contain 1. The water can be filtered inside the panel 1 because small perforations have been made on the panel during the work, for example nailing a nail to fix a sign or a scaffold, therefore this embodiment is especially advantageous.

The two half-panels 5 are faced and joined by joining means such as adhesive and / or screwed means. But in the preferred embodiment welding means are used. In this way, the ribs 6 that have been housed in the channels 7 of the half-panel in the channels 7 of the opposite half-panel 5 are fixed by welding lines, achieving a continuous and resistant connection.

Each half-panel 5, in the preferred embodiment, comprises a silhouette in the outer contour such that when facing the two half-panels 5 the outer contours of each half-panel 5 are coupled to each other forming a joint that is preferably sealed by at least one line of welding. Said silhouette of the outer contour of each half-panel 5 comprises side walls 11 substantially perpendicular to the flat face 3. In this way, a watertight, hermetic and resistant formwork panel is achieved.

A formwork panel, as is well known by the person skilled in the art, by simply manipulating it is subjected to aggressive conditions, especially during formwork, a process in which the formwork panel is subjected to various impacts. The most vulnerable areas of the formwork panel, therefore, must be able to withstand such blows or impacts. Such vulnerable areas are generally the outer zones, such as the outer contour or edge, the main flat faces and the corners. The fall of a panel usually occurs on the corners, which can cause a break or crack that can spread along the formwork panel.

In the preferred embodiment of the invention, the vulnerable areas of the outer contour and of the flat faces 3

5 are reinforced by welding lines as described above. To protect the corners from impacts, the formwork panel 1 of the invention comprises corner reinforcements 10 located in each of the corners of the panel 1.

Said corner reinforcements 10 may be of the same material as the semi-panels 5 but in the preferred embodiment, these corner reinforcements 10 are made of a stronger material so that they better absorb impacts.

10 Likewise, in the preferred embodiment said corner reinforcements 10 are additional components that are inserted during the joining of the two half-panels 5. For this, both the half-panel 5 and the corner reinforcement 10 comprise guides to accommodate the corner reinforcement 1 in semipanel 5 and thus facilitate its insertion.

In a third embodiment, said corner reinforcements 10 form an integral part of each half-panel 5, and a half-panel 5 with reinforced corners can be obtained directly from the mold. In addition, today, as the expert in the field knows, the technology allows obtaining in a single molding operation products of different materials, therefore, the corner reinforcement 10 could be of different material than the semipanel 5. this way, in this embodiment manufacturing operations are reduced since it is not necessary to insert the corner reinforcement

10. Likewise, said corner reinforcements 10 could cover the entire outer contour to achieve a stronger edge.

Claims (16)

1.-Formwork panel for concrete-based constructions comprising two parallel flat faces (3), suitable for defining a formwork face that is in contact with the concrete, a hollow interior space (4) defined between the two flat faces (3), and stiffening means (2) necessary for the formwork panel (1) to support the working pressure during the concrete setting process, characterized in that it comprises two semipanels (5) facing and coupled to each other defining the hollow interior space (4) and each semipanel (5) comprising one of said flat faces (3) and the stiffening means (2) being integrated in at least one of said semipanels (5). 2. Formwork panel according to claim 1, wherein the stiffening means (2) comprise ribs (6) substantially perpendicular to the flat faces (3). 3. Formwork panel according to claim 2, wherein the stiffening means also comprise channels (7) in which the ribs (6) of the semipanel (5) opposite are housed. 4. Formwork panel according to any of claims 2 or 3, wherein said ribs (6) are preferably arranged longitudinally. 5. Formwork panel according to any of claims 2 to 4, comprising additional ribs (8) arranged transversely. 6. Formwork panel according to any of the preceding claims, wherein the two half-panels (5) are substantially equal. 7. Formwork panel according to any of claims 3 to 6, comprising joining means, preferably welding lines, which connect the ribs (6) with the channels (7) of the semipanel (5) opposite. 8. Formwork panel according to any of claims 2 to 7, wherein the ribs (6) comprise evacuation means (9), preferably in the form of a groove, to dislodge the water that the formwork panel 1 could contain. 9. Formwork panel according to any of the preceding claims, wherein each semipanel (5) comprises in the outer contour side walls (11) substantially perpendicular to the flat face (3) that are coupled to the side walls (11) of the semipanel (5) facing. 10. Formwork panel according to any of the preceding claims, wherein a joint gasket, formed by coupling the outer contours of the two facing semi-panels (5), comprises at least one welding line. 11. Formwork panel according to any of the preceding claims, which also comprises corner reinforcements (10) preferably located in each of the corners of the formwork panel (1) to protect the formwork panel (1) from impacts . 12. Formwork panel according to claim 11, wherein said corner reinforcements (10) form an integral part of the half-panels (5). 13. Formwork panel according to claim 11, wherein said corner reinforcements (10) are additional components that are inserted during the joining of the two semipanels (5). 14. Formwork panel according to any of the preceding claims, wherein said panel is made of plastic material, preferably composite. 15. Formwork panel according to any of claims 11 to 14, wherein said corner reinforcements (10) are of different material than the semipanels (5).  ES 2 395 070 Bl   IV FIG 1 25 FIG. 2 ES 2 395 070 Bl one FIG 3 6 10 310 FIG. 4 SPANISH OFFICE OF THE PATENTS AND BRAND Application no .: 201130890 SPAIN Date of submission of the application: 30.05.2011 Priority Date: REPORT ON THE STATE OF THE TECHNIQUE 51 Int. Cl.: See Additional Sheet RELEVANT DOCUMENTS

Category

56 Documents cited Claims Affected

X

ES 1061596 U (JIMENEZ SANCHEZ JAIME ENRIQUE) 01.03.2006, 1-7,9,10,14

page 2, lines 7-22; page 4, line 34 - page 5, line 36; Figures 1-7.

Y

11-13.15

X

US 2008276567 A1 (RAPAZ ANTONIO) 13.11.2008, 1-6,8,9,14

paragraphs [0002,0005-0006,0041-0053]; Figures 1,2,15,22.

Y

WO 9106730 A1 (HJELM BO ALLAN) 16.05.1991, 11-13.15

page 4, lines 3-15; page 5, line 34 - page 6, line 4; figures.

TO

WO 2011032716 A1 (DOKA IND GMBH et al.) 03.03.2011 1.11-13.15

& Summary of the EPODOC database. Recovered from EPOQUE; AN EP-2010005717-W;

figures 1,2.

TO

WO 2010023342 A2 (PALACIOS GAVILAN CRISANTO et al.) 04.03.2010, 1.11-13.15

page 3, lines 19-22; page 7, line 7 - page 8, line 1; figure 3.

Category of the documents cited X: of particular relevance Y: of particular relevance combined with other / s of the same category A: reflects the state of the art O: refers to unwritten disclosure P: published between the priority date and the date of priority submission of the application E: previous document, but published after the date of submission of the application

This report has been prepared • for all claims • for claims no:

Date of realization of the report 27.12.2012

Examiner S. Fernández de Miguel Page 1/5

REPORT OF THE STATE OF THE TECHNIQUE CLASSIFICATION OBJECT OF THE APPLICATION E04C2 / 34 (2006.01) E04G9 / 05 (2006.01) E04G9 / 02 (2006.01) Minimum documentation sought (classification system followed by classification symbols) E04C, E04G Electronic databases consulted during the search (name of the database and, if possible, terms of search used) INVENTIONS, EPODOC  WRITTEN OPINION Date of Written Opinion: 27.12.2012 Statement

Novelty (Art. 6.1 LP 11/1986)

Claims Claims 11-13, 15 1-10, 14 IF NOT

Inventive activity (Art. 8.1 LP11 / 1986)

Claims Claims 1-15 IF NOT

The application is considered to comply with the industrial application requirement. This requirement was evaluated during the formal and technical examination phase of the application (Article 31.2 Law 11/1986).  Opinion Base.- This opinion has been made on the basis of the patent application as published. WRITTEN OPINION  1. Documents considered.- The documents belonging to the state of the art taken into consideration for the realization of this opinion are listed below.

Document

Publication or Identification Number publication date

D01

ES 1061596 U (JIMENEZ SANCHEZ JAIME ENRIQUE) 01.03.2006

D02

US 2008276567 A1 (RAPAZ ANTONIO) 13.11.2008

D03

WO 9106730 A1 (HJELM BO ALLAN) 05/16/1991

D04

WO 2011032716 A1 (DOKA IND GMBH et al.) 03-24-2011

D05

WO 2010023342 A2 (PALACIOS GAVILAN CRISANTO et al.) 04.03.2010

 2. Statement motivated according to articles 29.6 and 29.7 of the Regulations for the execution of Law 11/1986, of March 20, on Patents on novelty and inventive activity; quotes and explanations in support of this statement The present invention relates to a formwork panel for concrete-based constructions. Documents D01 and D02 are considered the closest to the prior art, anticipating the features described in claim 1. Document D01 discloses a formwork board or panel intended for the construction of concrete structures comprising two parallel flat faces, suitable for defining a formwork face that is in contact with the concrete, a defined hollow interior space between the two faces and stiffening means (see page 2, lines 7-11). The panel is formed by two semipanels (1, 2) facing and coupled to each other, defining a hollow interior space. Each semipanel comprises one of said flat faces, the stiffening means (3, 4) being integrated in said semi-panels. Document D02 shows a panel (12) for multiple construction applications comprising two semi-panels. (10) faced and coupled to each other defining a hollow interior space. Each semipanel comprises a flat face (14) and stiffening means (see figure 15). Claims 2-5, referring to stiffening means are also anticipated by documents D01 and D02. Document D01 comprises nerves (4) perpendicular to the flat faces (1, 2) and channels (3) in which the nerves of the opposite semipanel are housed. The panel has longitudinally arranged ribs and additional ribs arranged transversely (see Figures 1 and 2). Document D02 has similar characteristics (see figures 1 and 2). Claim 6 regarding the two half-panels being substantially the same is considered equally anticipated by documents D01 (see page 4, lines 51-53 and figures 5 and 6) and D02 (see figure 15). Claims 7 and 10, referring to joining means by welding lines, are anticipated by document D01 (see page 4, lines 48 and 49 and page 5, lines 5-7). Claim 8, referring to the means for dislodging the water, is anticipated by document D02 (see paragraph 0051). Claim 9, referring to the side walls, is anticipated by documents D01 (see figure 4) and D02 (see figure 2). Claim 14 is also anticipated by documents D01 and D02 describing panels of plastic material (see page 5, lines 27 and 28 in D01 and paragraph 0052 in D02). In view of documents D01 and D02, claims 1-10 and 14 are included in the prior art and therefore are not new or imply inventive activity (Art. 6.1 and Art. 8.1 of LP 11 / 1986). Claims 11, 13 and 15 incorporate, as elements not disclosed by documents D01 and D02, corner reinforcements. The technical problem to be solved is the protection of the panel against impacts. However, this problem and its solution are already included in document D03. Said document discloses a formwork panel that has reinforcements (12) located in each of the corners of the panel, said reinforcements being additional components that are inserted during the joining of the two sheets (10, 11) that make up the panel and different material than these (see page 4, lines 3-15 and page 5, line 34-page 6, line 4). It would be obvious to one skilled in the art to incorporate the reinforcements described in document D03 into any of the panels disclosed by documents D01 or D02 giving the result of the technical object described in claims 11, 13 and 15.  WRITTEN OPINION Claim 12, dependent on claim 11, adds that said reinforcements form an integral part of the semipanels. However, said possibility is considered an obvious alternative to that described in claim 13 and therefore in view of document D03, this claim would also not have inventive activity. On the other hand, said alternative is known in the state of the art through document D04. Therefore, the invention defined in claims 11-13 and 15 does not imply inventive activity as it results from the state of the art in an obvious way for a person skilled in the art (Art. 8.1 of LP 11/1986).