WO2005042877A1

WO2005042877A1 - Blocking device for formwork panels

Info

Publication number: WO2005042877A1
Application number: PCT/IB2004/052244
Authority: WO
Inventors: Enrico Fioroni; Paolo Sbuelz
Original assignee: Enrico Fioroni; Paolo Sbuelz
Priority date: 2003-10-31
Filing date: 2004-10-29
Publication date: 2005-05-12
Also published as: ITRM20030508A0; ITRM20030508A1

Abstract

A blocking system for panels (2) of a formwork (1) is characterized in that each panel (2) comprises a perimeter edge (3) integrally obtained on said panel (2) and having a plurality of interconnection areas (4) apt to engage to removable blocking means (5), the arrangement being such that following the side-by-side nearing of a pair of panels (2) the respective interconnection areas (4) coincide therebetween and cooperate with said blocking means (5) blocking the panels (2).

Description

BLOCKING DEVICE FOR FORMWORK PANELS

DESCRIPTION The present invention refers to a blocking system for formworks panels and, more precisely, to a blocking system for formworks panels for making beams, pillars, walls, floors, etc., of the kind providing a plurality of panels mutually blockable thereamong by removable pins. To date, several blocking systems are known for panels making the formworks suitable for making beams and pillars or the like. Suchlike formworks are of elongated shape and with a section equivalent to that of the beam and/or pillar to be made. The formwork is typically made with a plurality of interconnected panels, which, once mounted the one near to the other one, make the formwork surface. Moreover, it is also provided the option of connecting the formwork thus assembled to ground propping and/or anchoring members, for the alignment of the formwork. For suchlike applications it is required an easy and quick assembling of the formwork, with as much reliability and sturdiness. For this purpose, a first kind of system for blocking formwork panels is known in which it is provided a plurality of connecting profiled members, reversible and lockable thereamong, which are apt to block panel edges. Between two panels, these members can make plane joints as well as angle joints. Therefore, the panels are blocked at their ends via said profiled members. Such a solution entails the drawback of being of complicated and lengthy preparation for making the formwork, as well as exhibiting versatility limits with regard to different configurations of beams and/or pillars. Moreover, a second kind of system for blocking formwork panels is known in which it is provided a first plurality of blocking members, rack tongs-shaped and apt to cooperate with the external edges on each panel of the formwork. The arrangement is such that the panels, when arranged side-by-side the one to the other, are blocked at their edges by means of said rack tongs members. However, such a solution entails the drawback of being of lengthy preparation for making the formwork, as it has to be carried out the step of blocking the rack of each blocking member, and it exhibits versatility limits with regard to different configurations of beams and/or pillars to be formed. Moreover, the blocking step is complex, and the dimensions and the weights at issue are considerable . Furthermore, a third kind of system for blocking formworks panels to form beams or pillars is known in which each panel of the plurality of panels is connected to the respective adjacent panel by means of a slidable hinge system. The system allows the variable, as well as articulated, arrangement of two adjacent panels according to the kind and sizes of beams to be formed. Such a system, though versatile and very sturdy, entails the drawback of being extremely complex and difficult to handle. Moreover, dimensions, weights and operation costs are elevated. Hence, object of the present invention is to solve said drawbacks by providing a blocking system for formworks panels that be of extremely simple making and application, of high reliability and sturdiness, and concomitantly providing a high versatility, in a manner such as to employ the blocking system and relevant panels for any size or arrangement whatsoever of the panels of the formwork. Another object of the present invention is to provide a blocking system for the panels of a formwork allowing a facilitated mounting of the panels and the mutual blocking thereof. A further object of the present invention is to provide a blocking system for the panels of a formwork that be simple to use, of minimal dimensions and inexpensive . Hence, the present invention provides a blocking system for a plurality of panels to generate a formwork according to claim 1. Moreover, the present invention provides a method for mounting (making) a formwork incorporating the system according to claim 1. Hereinafter, it will be provided a detailed description of a preferred embodiment of the blocking system of the panels of a formwork according to the present invention, given by way of example and not for limitative purposes, making reference to the annexed drawings, wherein: Figure 1 is a schematic view of a pillar and relevant formwork obtained with the system of the present invention; Figure 2 is a perspective view of a panel suitable for the use of the system of the present invention; Figures 3A and 3B are two schematic top plan views of two arrangements of formwork obtainable with the panels and blocking system of the present invention; Figure 4A is an exploded view of the blocking means of the blocking system of the present invention; Figure 4B is a perspective view of the blocking means of the system of the present invention; Figure 4C is a partial perspective view of the blocking means of Figure 4A according to the blocking system of the present invention; Figures 5A to 7 show a sequence of mounting and blocking two formwork panels with the means and the blocking system of the present invention. Referring now to Figures 1, 2, 3A and 3B, hereinafter it will be provided the description of a formwork for making pillars, columns or the like. However, it has to be specified that the blocking system of the present invention is applicable to any use alternative to the one described hereinafter and in which an alike formwork structure, e.g. for making walls, floors, etc., is provided. According to the invention, it is provided a formwork 1 made of a plurality of panels 2, which once assembled make the continuous surface of the formwork 1. Each panel 2 has a blocking region made of a perimeter edge 3 allowing the mutual blocking between two adjacent panels 2. As it is evident from the figures, each side of the perimeter edge 3 has a plurality of holes 4, gauged and apt to removably engage the respective blocking means 5 (better illustrated hereinafter) . The mutual blocking of the panels 1 allows to obtain formworks 1 in different conditions, e.g. extending in elevation or in vertical and/or horizontal planes (walls or floors) . Moreover, as it is evident from Figures 1 and 2, each panel has structural reinforcement members 6 apt to give high rigidity and sturdiness to the latter. Analogously, also the structural members 6 have a plurality of gauged holes 4 to allow a removable engagement, via said blocking means 5, to optional props and/or anchors 7 for the alignment (the so-called plumb- lining) of the formwork 1 once assembled. According to the invention, it is provided that such props or anchors 7 be blockable onto the panels 2 and onto the ground bases via the same blocking means 5, in the manner better described hereinafter. On the other hand, referring now to Figures 3A and 3B and as it is evident therefrom, the system of the present invention allows a high versatility. In fact, according to the blocking system of the present invention, the panels 2 can assume various configurations blocked thereamong, in a manner such as to conveniently use always the same panels 2 for different sizes of formworks 1 and relevant beams, walls and floors thereby obtainable . Hence, an enormous advantage and saving on the operation costs ensues, according to the system of the present invention. Hereinafter, it will be provided a detailed description of the blocking means 5 according to the blocking system of the present invention. According to the present invention, and referring to Figures 4A, 4B and 4C, as blocking means for blocking a panel 2 on a respective adjacent panel 2 it is provided a plurality of pins 5. Each pin 5 is made of a head portion 51 having a prismatic shape complementary to the section of the holes 4. To the head portion 51 it is jointed a substantially cylinder-shaped body portion 52. Onto the surface of the body portion 52 there are obtained four plane regions 53, coplanar to the four surfaces of the head portion 51. The surfaces 53 serve the purpose of coaxially centering a hole 4 of a panel 2 with regard to the hole 4 of the adjacent panel 2 (better illustrated hereinafter) . The pin 5 is pivotally connected to a lever 54 by means of a connecting pin 55 blocked by a suitable check nut 56 and relevant friction washer 57. Moreover, the connecting pin 55 is apt to be alternatively inserted in a pair of holes 58 obtained on the body portion 52. It is understood that, according to needs, it is possible to connect the pin 52 to the lever 54 in one of the two holes 58. As it will be made evident hereinafter, thus it is possible to vary the length of the pin body 52 projecting from the lever 54. Referring in particular to Figure 4C, the lever 54 has, at its portion connecting to the pin 5, a cam profile-shaped edge. The profile provides several radiuses of curvature Rl and R2, in a manner such as to lift the pin 5 during the rotation of the lever 54, when the latter cooperates with the respective edge 3 of the panel 2 onto which it rests. Moreover, this cam profile ends with a rise 59, at 90° with respect thereto and for the engagement to the respective edge portion 3 of the panel onto which it cooperates following the mounting (better illustrated hereinafter) . Referring in particular to Figures 5 to 7, the system for blocking and self-centering the edges 3 of the panels 2 according to the present invention is illustrated. More precisely, subsequently to the side-by-side arrangement of a pair of panels 2, the relevant holes 4 on the edges 3 of a first panel 2 tend to coincide with the respective holes 4 onto the edge 3 of the underlying panel 2. In this condition and for the blocking, first the pin 5 is inserted in the pair of holes 4, until the former egresses from the opposite hole 4. It has to be specified that, according to the thickness of the edge 3 of the panels, it would be appropriate to choose a pin length 5 suitable for the relevant blocking. The latter is effected during the mounting of the pins 5 onto the lever 54 and thanks to the appropriate choice of the hole 58 to be connected. As the head portion 51 of the pin 5 enters the pair of holes 4, the former tends to coaxially align the latter thanks to an appropriate gauging of the sizes of the head 51 and of the hole 4. As the head 51 gets past the two holes 4, it is the body portion 52 of the pin 5 that is engaged to the edges of the holes 4 according to Figure 5B. In this condition, the surfaces 53 contact the edges of the holes 4. Then, it is effected a rotation of about 45° of the pin 5, in a manner such as to bring into contact the cylinder-shaped surface of the pin body 52 onto the walls of the holes 4, as illustrated if Figure 6A. Then, the transverse sizes of the pin body 52 (i.e., the diameter of the cylinder- shaped surface) are intentionally accurate and registering with those of the side of the hole 4, in a manner such that the rotation of the pin 5 causes a forced centering of a hole 4 with respect to the underlying hole 4. Moreover, the rotation of the pin 5 causes the bottom portion of the head portion 51 of the pin 5 to create an undercut interference on the sides of the hole 4, preventing the slipping off of the former from the latter as indicated in Figure 6B. Subsequently, for the tightened blocking of the first edge 3 onto the relevant underlying edge 3, it is effected a rotation of the lever 54, causing the cam profile to interact onto the edge 3 lifting the pin 5 to the forcedly blocked engagement (Figure 7). Then, the first panel 2 lies blocked onto the second panel 2, and the surfaces of the two panels 2 are coplanar thanks to the centering of the holes 4 of each panel 2. Of course, it will be required the use of plural pins 5 for each edge 3 of a pair of panels, according to structural needs. For the dismounting of the panels 2 of the formwork 1 thus assembled, it suffices to effect a maneuver specular to the abovedescribed blocking one. The blocking system of the present invention is susceptible of several modifications and variants not altering the inventive spirit thereof, and anyhow encompassed in the field of the appended claims.

Claims

CLAIMS 1. A system for mutually blocking a plurality of panels (2) for generating a formwork (1), wherein each panel (2) has a blocking region (3) for the mutual blocking between two or more adjacent panels (2), a set of structural reinforcement members (6) made integral onto said panel (2), and removable blocking means (5) for blocking one panel with a respective panel (2), the system being characterized in that said blocking region comprises a perimeter edge (3) integrally obtained on said panel (2) and having a plurality of interconnection areas (4), the arrangement being such that following the side-by-side nearing of a pair of panels (2) the respective interconnection areas (4) are aligned therebetween for cooperating with said removable blocking means (5) to generate a continuous surface of formwork (1) made of said pair of blocked panels (2) . 2. The blocking system for a plurality of panels (2) according to the preceding claim, wherein said interconnection areas comprise a plurality of holes (4), gauged and apt to cooperate with said blocking means (5) for the concomitant mutual alignment and blocking of a pair of panels (2) . 3. The blocking system for a plurality of panels (2) according to claim 1 or 2, wherein said blocking means comprises : - a pin (5) comprising: - a head portion (51) of shape complementary to said interconnection areas (4), and - a body portion (52) having a plurality of centering surfaces (53); and - a lever (54) pivotally connected to said body portion (52) of said pin (5) via a connection region (58) . 4. The blocking system for a plurality of panels (2) according to the preceding claim, wherein said head portion (51) of said pin (5) has a prismatic surface constituting a guide member for the mutual alignment of a pair of holes (4) when inserted in the blocking regions of two respective side-by-side panels (2) . 5. The blocking system for a plurality of panels (2) according to claim 3 or 4, wherein said centering surfaces (53) onto said body portion (52) of said pin (5) when inserted in a pair of holes (4) of two respective side-by-side panels (2), cooperates with the former in order to implement the mutual alignment of a first hole (4) with respect to the a second hole (4). 6. The blocking system for a plurality of panels (2) according to claim 3 or 4 or 5, wherein said connection region obtained on said body portion (52) of said pin (5) comprises a pair of holes (58) spaced and apt to pivotally engage with said lever (54) by means of a connecting pin (55) , the arrangement being such that when said body portion (52) is inserted in a pair of holes (4) of two respective side-by-side panels (2), implements the mutual centering of the one hole (4) with respect to the other hole (4) . 7. The blocking system for a plurality of panels (2) according to any one of claims 3-6, wherein the mutual alignment of a pair of panels (2) is obtained by limited interference tolerance following the insertion of at least one pin (5) in a pair of holes (4), and a subsequent preset axial rotation of said pin (5) with respect to said holes (4). 8. The blocking system for a plurality of panels (2) according to any one of claims 3-7, wherein the mutual blocking of a pair of panels (2) is obtained following the insertion and preset axial rotation of said pin (5) in said pair of holes (4), and subsequent preset rotation of said lever (54) onto said perimeter edge (3) of one panel of said pair of panels (2) . 9. The blocking system for a plurality of panels (2) according to any one of claims 3 to 8, wherein said lever (54) has a cam profile-shaped region (Rl, R2) apt to cooperate with said perimeter edge (3) of said panel during the rotation of said lever (54) to transmit an axial displacement to said pin (5) . 10. The blocking system for a plurality of panels (2) according to any one of claims 3 to 9, wherein following said preset axial rotation of said pin (5) with respect to said pair of holes (4) of perimeter edge (3) an interference blocking is made between said head portion (51) and the edge of a hole (4) of said perimeter edge (3) of a panel of said pair of panels (2) . 11. The blocking system for a plurality of panels (2) according to any one of the preceding claims, wherein said set of structural reinforcement members (6) made integral to each panel (2), are apt to cooperate with ground propping and/or anchoring members (7) for the alignment of the formwork (1) and blockable thereto via said blocking means (5) . 12. A method for making a formwork (1), characterized in that it comprises the following steps: arranging a set of panels (2) according to the preceding claims in a side-by-side mutual condition and such as to coincide the blocking regions (3) of each panel (2) to the respective blocking regions (3) of an adjacent panel (2); inserting a plurality of pins (5) having a lever (54) in respective holes (4) obtained on said blocking regions (3) according to the preceding claims; rotating each pin (5) for a preset angular amplitude with respect to said blocking regions (3); and rotating said lever (54) of each pin (5) with respect to the relevant blocking region (3) to which it is associated. 13. The method for making a formwork (1) according to claim 12, comprising the step of the alignment of said formwork (1) wherein it is provided the removable connection of a set of ground propping and anchoring members (7) on said structural reinforcement members (6) integral to each panel (2) of said plurality of panels (2). 14. Formwork (1) obtained with the method and incorporating the blocking system of the preceding claims.