FR2738859A1 - Pincers for assembling concrete shuttering panels - Google Patents

Abstract

The pincers have a female jaw (2), a male jaw (3) and a key (4). The jaws are each apertured and the key slides across the apertures. The pincers have supports allowing tilting of the key to an extended position. The pincers have a profiled base (6) having a groove (g) on its inner face. The tilting or rotation of the key occurs around an axis (65) perpendicular to a plane (67) parallel to the sliding axis (9) between the two jaws.

Description

CLAMPS FOR ASSEMBLING OFFERING PANELS
The present invention relates to clamps for assembling formwork panels and formwork systems incorporating panels and clamps for assembly.

 The technical sector of the invention is the field of manufacturing formwork systems for pouring concrete in place in the construction of buildings in particular.

 US Patent 4,881,716 (DINGLER) describes formwork systems using panels fitted at their periphery with profiles, provided on an inner face with a longitudinal groove and which are able to be assembled by pliers or clamps COmpOrtant two jaws, respectively male and female, capable of sliding relative to one another, and a locking key, capable of passing through the jaws, by virtue of covers or windows provided in the sliding parts of these jaws.

 Patent application EP 580 537 (ULMA) describes clamps for assembling shuttering panels whose key has a T-shaped section and whose male jaw is provided with notched lights.

 The present invention aims to improve formwork systems, and in particular the clamps for assembling formwork panels, as described in these documents.

 The present invention more particularly aims to facilitate the transport, storage, handling and use of clamps to assemble formwork panels.

 The solution to the problem posed consists in providing a pin for assembling panels essentially ocostituated by a female jaw, a male jaw and a key, which male and female jaws are each pierced with a light, which key is able to slide through of said lights, which clamp comprises means allowing the key to tilt in the extended position.

According to a preferred embodiment, the invention provides a clamp or vice or clamp or lock for assembling formwork panels, comprising a frame based on a profile provided on its internal face with a longitudinal groove, which clamp is PqAPatially constituted by a female jaw or jaw, a male jaw or jaw and a locking key,
- which female jaw is bent, in the general shape of L, comprising a first part or branch of swelling of elongated shape, which constitutes a sheath or a sheath, essentially constituted by two wings or narrow elongated plates, mutually parallel and between which ( and in which sheath) can slide a blade-shaped part of said male jaw,
- which male macho is bent in a general L> shape and has a first part or sliding branch in the general shape of a blade, that is to say of a narrow elongated plate,
- which sliding branches of said male and female jaws, and / or which blade of said male jaw and which wings of said sheath of said female jaw are each pierced with a hole or opening through which can slide said locking key,
- Which locking key is in the shape of an ooin, is capable of sliding in a direction which is not very inclined with respect to the perpendicular to the sliding plane of the parts of aoulissement of said male and female jaws, through said lumen or opening, and is capable of to be supported by two faces inclined with respect to each other, for example substantially opposite, on a part of each of said slots, to worsen the separation or the distance of said teeth or claws or jaws of said clamp,
- which key is provided with two means for stopping in translation or in sliding, or stops, which clamp comprises means allowing a tilting (or pivoting or rotation) of the key when the latter is in the extended (or released) position, which makes it possible to avoid the key from flowing through said slots, under the effect of its own weight particularly, when the clamp is in position of contact with the profiles to be assembled or tightened, that is to say by example in a position where said blades and said wings are slightly inclined relative to a horizontal plane, when the key is in the extended position or at least partially released (this corresponds to a situation in which said male and female jaws can slide freely at least one relative to the other over a predetermined distance), which means allowing the tilting is essentially constituted by a worked end of said key.

According to preferred embodiments
- The tilting or pivoting or rotation of said key takes place along an axis perpendicular to a plane parallel to which the respective claws of said male and female jaws can move, and / or a plane parallel to the relative sliding axis of said male jaws and female and parallel to the longitudinal axis of the profiles to be assembled and / or tightened,
- the thickness (and / or the smallest dimension) of the assembled pliers when the key is in the retracted position (or extended and tilted), is less than or equal to half of the smallest of the lengths (or largest dimensions) respective of said key and of said male and female jaws,
- said locking key is provided with a flattened heel or elbow, provided at its free end with a stop such as a pin or key,
- Said locking key is provided with a heel or elbow provided with a stop, which heel extends along an axis making an angle between 60 and 120 preferably, with a face and / or a main longitudinal axis of said key, or relative to an inclined faoe of said key,
said female jaw has one or two prominent stops along which (between which) part of said locking key can extend in the retracted or tilted position,
notches are provided in the lumen of the blade of the male jaw or else in the slots provided in the wings of the female jaw, making it possible to ensure several sliding positions of the key relative to said jaws,
- Said locking key is provided, over a substantial part of its length or the length of its handle, with a T-shaped section, and is provided in its heel or elbow-shaped section, with a section flattened, for example I-shaped or a rectangular section with rounded corners.

 The solution to the problem posed also consists in providing a formwork system comprising formwork panels provided at their periphery with profiles provided with an internal longitudinal groove and comprising clamps (in particular edge to edge) of formwork panels which are shaped to the invention, in which the thickness of said clamp, when said key is in the retracted or tilted position, is close to and preferably substantially less than the free depth of the profiles of the frame of the panels, so as to allow storage or transport of said clamps in the free space left between two of said panels when these are superimposed.

 Thanks to the fact that the key of the pliers according to the invention is tiltable or pivotable or retractable in the extended or released position, this makes it possible to facilitate the use of the pliers, and in particular allows to manipulate such pliers with one hand, in particular to make them oil and position them at a predetermined position along the profiles constituting frames of the formwork panels.

 The invention also makes it possible to significantly reduce the size of the assembly clamps and thus makes it possible to store them temporarily or for the purposes of transport between two superimposed formwork panels.

 Due to the fact that the clamps can be associated with the assembly panels, the invention makes it possible to significantly reduce the losses which are generally observed on a site because the clamps are stored separately from the formwork panels.

 The invention also provides, in a preferred embodiment where the key has a part whose cross section is T-shaped and where at least one of the slots is notched, assembly pliers whose jaws can slide over a great length and are provided with a large clearance, which allows them to be used in very diverse configurations, that is to say to adapt them to very variable thicknesses of the profiles of the panels to be assembled, and / or in the case where the panels are assembled is done by inserting between the two profiles of two respective panels, a wooden batten (or furring) in particular (which is used on a building site to adapt the formwork to a predetermined length which would be different from a multiple of the length of the panels formwork whose dimensions are fixed or standard due to their modular size).

 The numerous advantages provided by the invention will be better understood through the following description which refers to the appended drawings which illustrate without any limiting nature the preferred embodiments of assembly clamps according to the invention and their implementation in formwork systems.

 Figure 1 illustrates in schematic perspective view a formwork pliers in which the key is in an intermediate position between a clamping or locking position of the jaws and a release position in which the jaws have a relatively large latitude of relative sliding.

 FIG. 2 illustrates the same collet as in FIG. 1 in a position in which the locking key 4 is retracted.

 Figure 3 illustrates in side view a key used in the construction of a clamp according to the invention.

 FIG. 4 is a view along IV of the key of FIG. 3.

 Figures 5 to 7 are views in respective section along V / v, VI / VI, VII / VII of Figure 3.

 Figure 8 illustrates in side view a preferred embodiment of a female jaw forming part of a clamp according to the invention.

 FIG. 9 is a view along IX of FIG. 8.

 FIG. 10 illustrates in side view a male jaw forming part of a clamp according to the invention and adapted for use with the female jaw of FIGS. 8 and 9 and the key of FIGS. 3 to 7.

 Figure 11 illustrates in side view, a clamp according to Figures 3 to 10, in the contact position (for example prior to tightening) with the panel profiles to be assembled.

 FIG. 12 schematically illustrates in front view, two panels, the frames of which are fitted with crosspieces and corner pieces for maintaining in contact position a panel assembly clamp.

 Carmel shown particularly in Figures 1 and 2, a clamp 1 for assembling shuttering panels 5, is essentially constituted by a female jaw 2 and a male jaw 3 which can slide relative to each other along a rolling axis 9, further comprises by a wedge-shaped locking key 4 which is capable of sliding along an axis 10 perpendicular to the plane of the sliding parts of the jaws, through the latter, thanks to slots 24, 25, 26 respectively provided in the sliding parts of the jaws and susoeptibles to be arranged opposite each other.

 The formwork panels assembled edge to edge, or assembled with a wooden cleat (not shown), clamp between the edges of two consecutive panels, in which case the thickness of the assembly is significantly greater, are made small by plates or panels proper 7, which are provided on their periphery or periphery, with metal profiles 6, which have on their inner face a longitudinal groove 8, extending along the longitudinal axis 12 of the profiles 6 constituting the frame of the panels 5.

 The female jaw 2 is generally L-shaped, that is to say has two parts forming an elbow, a first part 15 carrying at its end a claw 19, capable of cooperating with the groove 8 provided in the profile 6 for constitute a contact and tightening zone.

 The female jaw 2 comprises a second part 16 which is essentially constituted by two wings 21 and 22 parallel to each other and parallel to the axis 9 of relative sliding of the jaws 2 and 3.

 Each of the wings 21, 22 can be constituted by a flat, narrow and elongated plate, and respectively comprises a lumen 24, 25, extending along an axis 36 parallel to the gluing axis 9 and to the general longitudinal axis of the second part 16 of the female jaw.

 In a complementary manner, the male jaw 3 is in the general shape of an L, that is to say in a bent shape, comprises a first part 17, one end of which is provided with a claw 20 symmetrical with the claw 19 of the female jaw , and comprises a second part 18 forming an elbow with the part 17, which second part 18 is essentially constituted by a blade 23, that is to say a narrow and elongated flat plate which is capable of sliding between the wings 21 and 22 of the female jaw 2, and more particularly to slide in the sheath 42 (FIG. 9) delimited by said wings 21 and 22.

 The blade 23 of the male jaw 3 also includes a lumen or opening 26 passing right through the blade 23 in a substantially central zone for example, which lumens 24, 25 and 26 respectively provided in the parts 21, 22, 23 of the jaws 2 and 3, allow the sliding, through these parts, of the key 4, and allow according to the invention, the pivoting according to the arrow 66 (FIG. 2) along a pivoting or tilting axis 65 perpendicular to a plane 67 which is parallel to the sliding axis 9 on the one hand, and to the longitudinal axis 12 of the profiles on the other hand, of said key relative to said jaws.

 Carmel shown in particular in Figures 1 to 7, said key 4 is L-shaped or is bent, and more particularly comprises a main part or handle or first part marked 33, which extends along a main longitudinal axis 11, which in the position marked in Figure 1, is vertical, that is to say parallel to the longitudinal axis 12 of the profiles to be assembled, and which in the retracted position of Figure 2, is substantially parallel to the axis 9 of ooulissement.

 The key 4 has two opposite faces (or generatrices) 32 and 39, which are inclined with respect to each other by an angle 40, for example close to 10 *, in order to constitute an eye promoting the wedging of the key by respective contact of its bearing faces 32 and 39 on parts of the openings 24, 25, 26 of the jaws, when these are in contact with the grooves 8 of the profiles 6, which makes it possible to avoid separation jaws 2 and 3 and, on the contrary, tends to bring the claws 19, 20 one of the other to the contact of the grooves 8.

 The length 29 of the female jaw 2, the length 30 of the male jaw 3, and the length 31 of the key 4, are generally of the same order of magnitude, for example of the order of 10 to 30 centimeters approximately.

 Thanks to the pivoting or tilting of the key 4, as shown in FIG. 2, the total thickness 28 of the clamp when the key is in this position is less than the free height available between two successive shuttering panels, when these are stored superimposed or stacked, which depth or free height is identified 68, FIG. 2 in particular, and corresponds to part of the height of the profile 6.

 This thickness 28 is for example and preferably less than half of the greatest of the lengths 29, 30 or 31.

 The central or main part 33 of the key 4 has a section 44 in the general shape of a T, as shown in particular in FIGS. 5 and 6, the height 47 (as well as the width 56 of the wings 48, 49 of the T) decreases when an moves from the upper end 46 of the key 4 towards its second end, that is to say towards the heel or strap 14 provided at this second end according to the invention.

 In this lower part of the key, the section 43 of the key is preferably rectangular with rounded sheep, as shown in FIG. 7, the height 47 of the section of the key decreasing precisely due to the angle of the inclination of the support faoe 39 at the angle 40, with respect to the longitudinal axis 11, that is to say also with respect to a second support faoe 32 of this key on the parts of the slots provided in the sliding jaws.

 The distance 34 separating the support face 32 (or alternatively the support face 39 in a version not shown) from the lower stop 27, for example constituted by a pin passing through the end of the worked part 14 of the key, is preferably at least equal to the thickness marked 35, FIG. 1 and 9 in particular, of the female jaw, in order to allow a complete tilting of the key 4, as shown in FIG. 2 and therefore in order to allow obtaining a minimum thickness 28 of the clamp when the key is thus retracted.

 Carmel shown in Figures 1, 2 and 9 in particular, the key can be held in position in this retracted position by two prominent stops 37 and 38 provided on the external face 41 of one of the two wings 21 or 22 of the female jaw 2.

 Carmel shown particularly in Figure 8, the light 24 (which has a shape preferably identical to that of the light 25 of the wing 22) provided in the wing 21 of the female jaw 2, has faces 52 substantially flat, parallel between they and parallel to the longitudinal axis 36 of the lumen 24, which is itself parallel to the longitudinal axis 9 of relative sliding of the jaws therebetween, and to the longitudinal axis of the sheath part of the female jaw 2 .

 The parallel faces 52 are connected at their two ends by semi-cylindrical faces 53, to form an oblong slot elongated over a part of the length of which is provided a plurality of notches 54 regularly spaced along said axis 36, and arranged substantially symmetrically relative to this axis, in the case where the T-profile 44 of the key is also symmetrical, and therefore of shape complementary to the profile of this key.

 The maximum width 57 in line with the notches 54, 55 of this light 24, is obviously slightly greater than the greatest width 56 of the wings of the T-section of the key in its main part 33, in order to allow the passage of such ci through the light 24, as shown schematically in phantom in FIG. 8.

 Carmelite illustrated in Figure 10, the light 26 provided in the blade-shaped part 23 of the male jaw 3, comprises a substantially rectangular part formed by faces 60 parallel to each other and to the longitudinal axis 59 of the light 26 and said blade 23, and by second far 62 parallel to each other and to said axis 59, which are spaced apart by a distance less than the maximum width 58 of the light 26 corresponding to the spacing of the faoes 60, which width 58 is itself also greater than the width 56 of the part forming the wings of the T and of the section of the key, so as to also allow the sliding of this key through this light 26.

 The faces 60 and 62 are interconnected by inclined faoes 63, the light 26 being limited by end faoes 61 against at least one of which can bear the key in the position for locking the jaws and clamping the profiles .

 As illustrated in FIG. 3 in particular, the elbow 14 provided at the lower end of the key 4, extends along a longitudinal axis 13 making an angle 45 for example close to 90 with the longitudinal axis 11 of the main part 33 of the key 4.

 The upper part 46 of width 47 allows the enclosure of the key in foroe to obtain the tightening by the effect of ooin effected by the key, for example by striking on this upper part 46 of the key using a hammer (which head 46 also serves as a stop to prevent the key from being able to pass entirely through the openings 24 to 26).

 As illustrated in particular in FIGS. 5 and 6, the T-shaped section of the central or main part 33 of the key has a central core 50 extended at an end close to the inclined edge 39 or contact face with one of the jaws, by a bead 51, and extended at its second end of the side of the second face 32 of support against the jaws, by the wings of the T-section which are limited by profiles or faces 48 and 49 preferably curved; the profiles 48 and 49 are identical or similar to the profile 55 of the notches 54 of the light 24 as illustrated in FIG. 8.

 More precisely, in a position for tightening the pin, the key 4 will, on the one hand, be in contact with the smallest of the end faces 61 of the lumen 26 of the male jaw 3, by its inclined generatrix 39, and on the other hand, part of the profile 55 of the notches 54 of the slots 24 and 25 superimposed on the wings 21 and 22 of the female jaw 2, by a part of its face 32 such as generaters (parallel to the axis longitudinal 11 of the key) located at the level of the quarry part 48 of the wings of the T-section.

 With reference to FIG. 11, a pin is illustrated in a view similar to that of FIG. 9 in particular, which is in contact with the groove of the profile 6, by the free end of the arm 15, and in contact with the front face. (or external) 100 of the profile 6 by a face 90 of a plate or heel 8 inoorporée to the female jaw 2, which face 100 extends substantially parallel to the reference plane 67, FIG. 2: three-point or support area make it possible to avoid sliding and / or tilting of the clamp, in the non-tightened state, along the profiles 6 to be assembled.

 Other means to avoid tilting can be achieved, as shown in FIG. 12, by fitting the profiles 6 forming the frame of the panels 5 of cross-pieces 82 connecting two parallel profiles together, and by additionally providing corner pieces 81, by example constituted by curved metal plates which are welded to said profiles and crosspieces, and which delimit housings or corner cavities 83, 84, into which the two arms or jaws of a clamp can respectively be slipped.

Claims (10)

 1. Pinoe for assembling panels essentially consisting of a female jaw (2), a male jaw (3) and a key (4), which male and female jaws are each pierced with a light, which key is able to slide through said slots, which clamp comprises means allowing the key to tilt in the extended position.  2. Pinoe for assembling formwork panels, comprising a frame based on a profile (6) provided on its internal face with a longitudinal groove (8), which clamp is essentially constituted by a female jaw (2) bent , a bent male jaw (3) and a locking key (4),  - which female jaw (2) comprises a first part which constitutes a sheath in which a blade-shaped part of said male jaw can slide,  - which blade of said male jaw and which sheath of said female jaw are each pierced with a light through which can slide said locking key,  - which locking wedge is in the form of an ooin, is capable of being supported by two faces (32, 39) inclined one relative to the other on a part of each of said slots,  - which key is provided with two stop means,  - Which clamp includes a means for tilting the key in the released position, which is essentially constituted by one end (14) of the said key cover.  3. Pinoe according to any one of claims 1 to 2, in which the tilting (66) or rotation of said key takes place along an axis (65) perpendicular to a plane (67) parallel to the axis (9) relative sliding of said male and female jaws.  4. Pinoe according to any one of claims 1 to 3, wherein the thickness (28) of the clamp when the key is in the retracted position, is less than or equal to half of the smallest of the lengths (29, 30 , 31) respectively of said key and of said male and female jaws.  5. Pin according to any one of claims 1 to 4, wherein said locking key is provided with a flattened heel (14), provided at its free end with a stop (27).  6. Pinoe according to any one of claims 1 to 5, wherein said locking key is provided with a heel (14) or elbow provided with a stop (27), which heel extends along an axis (13 ) making an angle (45) between 60 and 120, with an axis (11) main lolngitudinal of said key (4).  7. Pliers according to any one of claims 1 to 6, wherein said female jaw has at least one protruding stop (37, 38) along which may extend part of said key (4) for locking in position retracted or bumped.  8. Pliers according to any one of claims 1 to 7, in which notches (54) are provided in the opening (26) of the blade (23) of the male jaw (3) or else in the openings (24, 25) provided in the wings (21, 22) of the female jaw (2), making it possible to ensure several sliding positions of the key (4) relative to said jaws (2, 3).  9. Pliers according to any one of claims 1 to 8, wherein said locking key (4) is provided, over a substantial part of its length or the length of its handle, with a section (44) in the form of T, and is provided in its heel or elbow-shaped part, with a flattened section (43).  10. Formwork system comprising formwork panels provided at their periphery with profiles (6) provided with a longitudinal groove (8) and comprising clamps (1) for clamping the formwork panels placed edge to edge which conform to the 'any one of claims 1 to 9, wherein the thickness (28) of said pin, when said key (4) is in the retracted or tilted position, is close to and preferably substantially less than the free depth (68) of the profiles (6).