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(11) | EP 0 439 454 B1 |
| (12) | EUROPEAN PATENT SPECIFICATION |
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| (54) |
FORM CLAMP TO JOIN PANELS, IN PARTICULAR, CEMENT CASTING FORMS FORMKLAMMER ZUM VERBINDEN PLATTEN, INSBESONDERE BETONSCHALUNGSTAFELN PRESSE A COFFRAGE POUR L'ASSEMBLAGE DE PANNEAUX NOTAMMENT DES COFFRAGES DE COULAGE DE CIMENT |
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| Note: Within nine months from the publication of the mention of the grant of the European patent, any person may give notice to the European Patent Office of opposition to the European patent granted. Notice of opposition shall be filed in a written reasoned statement. It shall not be deemed to have been filed until the opposition fee has been paid. (Art. 99(1) European Patent Convention). |
[0001] The subject of the present invention is a form clamp to join panels, in particular, cement casting forms.
[0002] Clamps to join panels for cement casting forms are known, and generally consist of a bar equipped with hooking means at the respective extremities having opposed pegs on corresponding crosspiece on the form panels, comprising clamping means which tend to "pull" the respective hooking orthogonally with the evident inconvenience of necessitating further means of clamping to unite the respective form panels at the edges.
[0003] Other clamping means are disclosed in EP-A-0201887 (84 DE-U-8514233), in which a couple of hooking means pivoting around an axis is disclosed, this solution not allowing a large variation of the distance between the hooking means.
[0004] Furthermore this document discloses a form clamp having a couple of hooking means each one pivoting around a separate axis. Said hooking means being oriented by separate indipendent transverse screw means. This form clamp having a couple of partial ledge contact means to abut on a frontal surface of the couple of panels to be clamped.
This solution realizes a very complex solution (two screw means) and the respective hooking means have important limitation in excursion because said screw means are transversally placed.
[0005] DE-A-3609498 discloses a clamping means with a linear stud having two hooking means, one fixed and the other inclined, placeable in different positions, and sliceable in said inclined position in pulling by screwing means.
If this solution solves the problem to change the distance, it does not allow a preeminent partition of the clamping force in clamping action, being preeminent necessity in the cement casting forming the linear component force.
FR-A-2527254 discloses a clamping means having a couple of pulling hooking means approachable in clamping by a traversal screw without guiding or abutment bars;
This solution does not allow alignment action of the panels.
US-A-2526529 discloses a clamping means for exclusive alignment of the panels.
US-A-1538496 discloses a clamping means utilizing a parallel screw without guidance or alignment elements and in one solution also an angled clamping means is disclosed having a diagonal reaction pulling element.
The main drawback in the second two solution having no means for alignment, the alignment being one of the the two most important scopes (clamping and alignment in the same time of the panels to be connected).
[0006] These types of clamps further present the following disadvantages:
(1) imperfect adaption to the form panels because:
- either they are in complete contact and therefore internal cocking occurs if the panels are not perfectly flat or are not of regular thickness as the same ledge of the clamp determines an external alignment instead of an internal one;
- or they are not in contact ,and therefore the clamping may take place in an alignment position which is not desired.
(2) the impossibility of a valid solution for internal and external corner jointings.
[0008] The present invention, as per the characteristics given in the attached claims, solves the problem with a form clamp to join two oppose panels in particular for cement casting forms, of the type having:
- a support bar comprising two transverse opposed fork-shaped hooking means to be hooked on respective opposed peg means on a crosspiece of each of said opposed panels to make up a form,
- said fork-shaped hooking means having a hollow hooking shape for said peg means, in order to realize, in clamping, a slanted reaction converging to an apex between said two pairs of forks so as to realize a longitudinal reaction for clamping and an orthogonal reaction for placing in abuting coplanar line the surfaces of said panels to be clamped;
- at least one of said fork-shaped hooking means is orientable in clamping way against the opposed one by means of screw means,
- said support bar is equipped with at last partial ledge contact means on at least one surface of the panels to be clamped;
characterised by the following combination of characteristics:
- said support bar has an orthogonal externally protruding holed head plate guide;
- each one of said opposed fork-shaped hooking means is realized in a couple of fork-shaped hooking means in transverse clamping protusion placed to the opposite sides of said support bar, in order to pass over one side and the opposite side of said crosspiece in said panels from which said peg means protrudes in opposition;
- one pair of said fork-shaped hooking means is fixed on said support bar;
- the second pair of said fork-shaped hooking means (2), is freely in balance way pivotable
on said support structure (A), in such a manner that:
. a clamping part of said pivotable hooking means protrudes from the same side as the first fixed ones, to clamp said opposed peg means, and
. the other part:
. protrudes from the opposite side of said support bar (A);
. pivotably hinges, between said hooking-means a screw head of a "T" shaped screw means, the threaded part of which passing through said hole in said head plate guide;
- said support bar is equipped with said partial ledge contact means to abut on the surfaces of the panels to be clamped;
[0009] The advantages obtained with this innovation consist essentially in that a perfect alignment of the respective internal surface (form surface) is possible, even though ledges for both the panels to be clamped are available.
[0010] According to the invention, the respective clamps conveniently have a curved or square angled support bar. The advantage being to allow clamping of any type of panel connection.
[0011] The solution claimed has the advantage of realizing a highly reliable clamping system which is effective, of simple and dependable conception as well as being economical and easily realized in the various straight, curved or internal or external angle configurations, depending on the respective alignments required.
[0012] The invention is hereafter explained in more detail with assistance of the drawings showing the preferential solutions for realization, the execution details of which are not to be held as limiting but only as examples.
Figure 1 gives a prospect view of the connection system for two panels with a clamp for straight line connection.
Figure 2 gives a prospect view of the connection system for two panels with a clamp for right-angled (square), external connection.
Figure 3 gives a prospect view of the connection system for two panels with a clamp for right-angled (square), internal connection.
[0013] As can be seen from the above-mentioned figures, the clamps are indicated by A and the panels to be joined by B,B′. Each clamp has a stout as a straight bar support (A) (Fig. 1). Said bar support can be curved (not illustrated), or (square) right-angled with fork-shaped hooking means (1,2) inwardly orientated (Fig. 2), or outwardly orientated (Fig. 3). Said support bar (A) has one supporting block (1˝) for a partial ledge contact on a respective panel to be joined (B,B′). The external end part of the pivoted hooking means, hinges the head (4) of a "T"-shaped screw (5). The opposite pair of hooking means, are plates welded (1) at the opposite extremity of said support bare (A).
Each copuple of said hooking means hooks corresponding pegs (b) of the panel of the form (B,B′).
[0014] Close to said orientable couple of hooking means (1) and at the end of said support bar (A) a plate with a drilled hole (1′) is welded. A pair of oscillating, balance-type hooking plates (2) is pivotably hinged (3) near this end plate (1′); the external end part of said pair of orientable hooking means is pivoted and hinges the head (4) of said "T"-shaped screw (5), which passes through said hole of said end plate (1′) to be stretch-clamped by wing nut (6).
- a support bar (A) comprising two transverse opposed fork-shaped hooking means (1,2) to be hooked on respective opposed pegs means (b) on a crosspiece of each of said opposed panels (B,B′) to make up a form, said fork-shaped hooking means (1,2) having a hollow hooking shape for said peg means (b), in order to realize, in clamping, a slanted reaction converging to an apex between said two pairs of forks so as to also realize a longitudinal reaction for clamping and an orthogonal reaction for placing in abutting coplanar line the surface of said panels to be clamped (B);
- at least one of said fork-shaped hooking means (2) is orientable in clamping way against the opposed one (2) by means of screw means,
- said support bar (A) is equipped with at last partial ledge contact means (1˝) on at least one surface of the panels to be clamped (B,B′);
characterised by the following combination of characteristics:- said support bar (A) has an orthogonal externally protruding holed head plate guide (1′);
- each one of said opposed fork-shaped hooking means (1,2) is realized in a couple of fork-shaped hooking means (1,2) in transverse clamping protrusion placed to the opposite sides of said support bar (A), in order to pass over one side and the opposite side of said crosspiece in said panels (B,B′) from which said peg means (b) protrudes in opposition;
- one pair of said fork-shaped hooking means (1,2) is fixed on said support bar (A);
the second pair of said fork-shaped hooking means (2), is freely in balance way pivotable
(3) on said support structure (A), in such a manner that:
. a clamping part of said pivotable hooking means (2) protrudes from the same side as the first fixed ones (1) to clamp said opposed peg means (b), and
. the other part:
. protrudes from the opposite side of said support bar (A);
. pivotably hinges, between said hooking-means (2-2) a screw head (4) of a "T" shaped screw means, the threaded part of which (5) passing through said hole in said head plate guide (1′).
- said support bar (A) is equipped with said partial ledge contact means (1˝˝) to abut on the surfaces of the panels to be clamped;
- einer Stützstange (A) mit zwei gegenüberliegenden gabelförmigen Querhaken (1, 2), die auf gegenüberliegende Zapfen (b) auf einem Querträger jeder der besagten gegenüberliegenden Platten (B, B′) gehakt werden und so eine Form bilden, wobei die genannten gabelförmigen Haken (1, 2) einen Hohlraum zum Aufhaken an den besagten Zapfen (b) aufweisen, um beim Einspannen einen schrägen Druck auszuüben, indem sie zwischen den gennanten beiden Gabelpaaren zu einer Spitze zusammenlaufen, so daß sich auch ein Druck in Längsrichtung für das Klammern ergibt und ein rechtwinkliger, um die Oberflächen der gennanten zu klammernden Platten (B) in eine koplanare Stoßlinie zu bringen;
- mindestens einer der besagten gabelförmigen Haken (2) ist klammernd gegen den gegenüberliegenden (2) durch ein Schraubelement orientierbar,
- die genannte Stützstange (A) ist versehen mit einer mindestens teilweisen Kontaktleiste (1˝) auf mindestens einer Oberfläche der zu klammernden Platten (B, B′);
gekennzeichnet durch die folgende Kombination von Merkmalen:- die genannte Stützstange (A) besitzt eine rechtwinklige nach aussen vorspringende Lochkopf-Plattenführung (1′);
- jeder der genannten gegenüberliegenden gabelförmigen Haken (1, 2) ist als ein Paar von gabelförmigen Haken (1, 2) ausgebildet, die zum Klammern quer vorstehen und sich an den gegenüberliegenden Seiten besagter Stützstange (A) befinden, so daß sie über die eine und auch die gegenüberliegende Seite des genannten Querträgers in den Platten (B, B′) hinübergehen, von welchem der besagte Zapfen (b) in Gegenrichtung vorspringt;
- ein Paar der genannten gabelförmigen Haken (1) ist auf besagter Stützstange (A)
befestigt;
das zweiter Paar der genannten gabelförmigen Haken (2) ist auf besagter Stützstruktur
(A) frei balancierend drehbar (3), so daß:
. ein klammerndes Teil dieser drehbaren Haken (2) von derselben Seite hervorragt wie die ersten befestigten (1), um den genannten gegenüberliegenden Zapfen (b) festzuspannen, und
. das andere Teil:
. von der gegenüberliegenden Seite besagter Stützstange (A) hervorragt ;
. zwischen diesen Haken (2-2) als Drehpunkt für einen Schraubenkopf (4) eines T-förmigen Schraubelementes dient, dessen gewundener Teil durch das Loch in der genannten Kopfplattenführung (1′) geht.
- Die besagte Stützstange (A) ist mit der erwähnten teilweisen Kontaktleiste (1˝) ausgestattet, die an die Oberflächen der zu klammernden Platten stoßen soll.
- une barre de support (A) comprenant deux moyens d'accroches transversales opposées en forme de fourches (1,2) qui s'accrochent sur les respectives chevilles (b) sur la traverse de chaque panneau opposé (B,B′) pour former un coffrage, les dits moyens d'accroches en forme de fourches (1, 2) présentent une conformation creuse pour les dits moyens d'accroches (b) pour déterminer, en serrant, une réaction inclinée vers le sommet entre les deux couples de fourches afin d'en réaliser aussi une réaction longitudinale pour serrer et une réaction orthogonale pour mettre en ligne sur le même plan la surface des dits panneaux à serrer (B);
- au moins une des fourches est orientable (2) en serrant la vis dans le sens opposé.
- la dite barre de support ou la structure résistante (A) est équipée d'une protubérance
de contact partiel sur au moins une superficie des panneaux à serrer (B,B′) ;
caractérisé par la combinaison des caractéristiques suivantes:
- la dite barre de support (A) possède une tête plate orthogonale trouée qui déborde à l'extérieur (1′);
- chacun des dits moyens d'accroches opposés en forme de fourches (1, 2) est assemblé et forme une paire de moyens d'accroches en forme de fourches (1, 2) qui se trouve en protubérance pour serrer au coté opposé de la dite barre de support (A) afin de passer par dessus un coté et le coté opposé de la dite traverse sur les dits panneaux (B,B′) à partir duquel les dites chevilles (b) avancent en opposition.
- une paire d'accroches dites en forme de fourches (1, 2) est fixée sur la barre de
support (A);
la seconde paire des dites accroches en forme de fourches (2) est librement pivotable
en équilibre (3) sur la dite structure de support (A) de manière à ce que :
. une partie qui serre les dits moyens de serrage pivotables (2) avance du même coté que les premiers moyens de serrage pivotables fixés (1) pour serrer les dits moyens de chevilles opposés (b) et
. l'autre partie:
. avance du coté opposé de la barre de support (A);
. s'articule de manière pivotable, entre les dits moyens d'accroches (2-2), une tête de vis (4) d'une vis en forme de"T", la partie filetée de celle-ci (5) qui passe dans le dit trou de la dite tête plate (1′).
- La dite barre de support (A) est équipée de la dite protubérance de contact partiel (1˝) pour dépasser sur les surfaces des panneaux à serrer.