Thin rectangular cladding blade for in-line installation

Abstract

Title: Thin rectangular cladding blade for in-line installation Blade having a large tongue side (LG) with a locking tab (23) under the upper support (21), a large groove side (RG) having a groove (13) under the upper support (11). Under the upper support (21) and above the tongue (23), the large side (LG) has a sealing cavity (41) and between the upper support (11) and the locking support (131) of the groove (13), the large side (RG) has a beak (31) coming into the sealing cavity (41). Figure 2

Description

Title of the invention: Thin rectangular covering blade for in-line installation FIELD OF THE INVENTION

[0001] The present invention relates to a thin rectangular PVC, HDF covering blade for in-line installation having: a pair of long sides, one of which is a tongue side and the other a groove side, to be assembled in parallel lines, long side against long side and short side against short side, by assembly by engagement and tilting of the tongue of the blade to be installed in the groove of a blade already installed, with their complementary profiles,

[0002] the small sides having hooking profiles which are assembled by the small side of the blade to be laid to the small side of complementary shape of the blade laid in the same laying line, by the tilting movement of the blade around the large tongue side,

[0003] A) the large tongue side having a profile relative to the junction plane of two assembled blades comprising:

[0004] - a high support in the junction plane,

[0005] - a locking tab under the upper support, projecting from the junction plane with a top and an inclined bottom joining a cavity set back from the junction plane and one side of which forms an edge truncated to the bottom

[0006] B) the large grooved side, with a profile complementary to the profile of the tongued side, comprising:

[0007] - a high support to come against the high support of the large tongue side, a groove under the high support, delimited by a locking support and a lower side extending by

[0008] - a head coming to bear in the cavity to push and retain the tongue in the groove. STATE OF THE ART

[0009] Multiple shapes of thin rectangular covering blades are known for in-line installation.

[0010] However, these embodiments have the disadvantage of not being watertight at the junctions, these watertightness defects are mainly linked to the complexity of the assembly elements by tilting and clipping in the large sides rather than the small sides.

[0011] PURPOSE OF THE INVENTION

[0012] The present invention aims to develop a thin rectangular blade of re garment for in-line installation, which is perfectly waterproof both at the assembly of the long sides, that is to say in the junction plane of the long sides and in that of the short sides.

[0013] DISCLOSURE AND ADVANTAGES OF THE INVENTION

[0014] To this end, the invention relates to a blade of the type defined above, characterized in that

[0015] a) under the upper support and above the tongue, the large side has a sealing cavity set back from the junction plane and opening into it, the sealing cavity having a triangular section delimited by an upper support side, a lower clearance side extending over the top of the tongue forming a locking top,

[0016] b) between the high support and the locking support of the groove, the large side comprises a triangular beak projecting from the joining plane and having on the top, a contact surface joining the high support and on the bottom, a guide surface joining the locking support of the groove, the beak coming into the sealing cavity with its contact surface against the upper support side of the cavity, the locking top coming into contact against the locking support of the groove, the rear ramp forming one side of the recess coming into contact against the rear ramp of the groove to retain the tongue engaged in the groove and maintain the contact of the high supports, that of the beak in the sealing cavity and that of the locking top against the locking support.

[0017] The blade according to the invention has the advantage of ensuring perfect sealing of the assembly both at the level of the long sides and the short sides assembled by clipping. The assembly of the short sides is perfectly sealed over the entire junction plane of the short sides including at the intersection of the short sides and the long sides.

[0018] According to another characteristic, the locking support of the groove and the locking top of the tongue are parallel to the top and bottom of the blade, which guarantees the holding of the watertight assembly.

[0019] According to another characteristic, the profiles of the short sides have: on the first short side, a hook shape formed by a projection and a head extended beyond the junction plane of the short sides, and on the second short side, a complementary shape of an inverted hook, set back from the junction plane of the short sides,

[0020] a) the profile of the first short side comprises from the top to the bottom: a high support extended by a zone of notches set back from the junction plane, continuing with a cavity in the projection and followed by the head bordering the cavity by a stop side rising on the head by a guide ramp to the top of the head whose contour descends towards the bottom by a descending surface,

[0021] b) the profile of the second small side complementary to that of the small side comprises, at from above to below: a high support extended by a zone of notches projecting from the junction plane continuing with a plug delimited by a shape complementary to that of the cavity of the projection and bordered by a stop segment going up towards a slope to a bottom of the recess delimited by a descending surface parallel to the junction plane,

[0022] c) the plug is embedded in the cavity of the extension in contact with the stop side and the ramp respectively by the stop segment and the slope.

[0023] According to another characteristic, the notched area comprises at least one notch and preferably two notches, the notched area comprises at least one notch and preferably two notches, the notches have a triangular shape with a retaining side that is very inclined (angle a) relative to the junction plane PJJ and a slightly inclined slope (angle |3) relative to the junction plane PJJ, this succession of retaining sides / slopes being repeated for each notch of the succession of notches of the notched area between the upper support and the curve of the plug, the notches of complementary shape having a triangular section starting with a retaining side following the upper support, very inclined at angle (a) relative to the junction plane and a slightly inclined slope (angle |3) relative to the junction plane.

[0024] According to another characteristic, the profiles of the notch zone and the notch zone, formed by the retaining sides and the slopes are connected to the upper support by a fillet and the retaining sides and the slopes or the slopes and the retaining sides are connected by fillets.

[0025] In particular, the fillets at the two ends of the retaining side are circular arcs which meet at a junction point with a common tangent to form a curvilinear retaining side whose inclination is that of the common tangent at their junction.

[0026] In particular, for the notches and the notches, the angle (a) is an angle between 50° and 80° and the angle [3 is between 7° and 12°.

[0027] According to another characteristic, the notches of a notch zone are identical and the notches of a notch zone are identical and of a shape homologous to that of the notches.

[0028] According to another advantageous characteristic, the upper part of the large sides comprising the high supports and the nose / groove correspond substantially to half the thickness of a blade, the upper part of the small sides comprising the high supports and the notch / groove area correspond substantially to half the thickness of a blade. Brief description of the drawings

[0029] The present invention will be described below in more detail with the aid of embodiments of a thin rectangular covering blade for in-line installation according to the invention shown in the attached drawings in which:

[0030] [Fig-1] diagram of laying blades,

[0031] [Fig.2] cross-sectional view of two assembled blades,

[0032] [Fig.2A] assembly step by tilting two blades,

[0033] [Fig.2B] cross-sectional view of a profile variant,

[0034] [Fig.3] longitudinal sectional view of a blade,

[0035] [Fig.3A] enlarged view of the notch and notch areas,

[0036] [Fig.3B] enlarged view of a profile variant of the notch zone and that of notches,

[0037] [Fig.3C] schematic view of the assembly of two small sides of the blade according to [Fig.3],

[0038] [Fig.3D] step of assembling two small sides according to [Fig.3],

[0039] [Fig.4A] superimposed sectional view of the tongue end of the long side and the first end of the short side,

[0040] [Fig.4B] superimposed sectional view of the tongue end of the long side and the second end of the short side,

[0041] [Fig.5] sectional view of a variant of the profile of [Fig.3],

[0042] [Fig.6] Longitudinal sectional view of the blade of a second embodiment of the profile of the short sides,

[0043] [Fig. ôA] assembled view of two short sides of the second embodiment,

[0044] [Fig.7A] step of assembling two small sides of the second embodiment,

[0045] [Fig.7B] another step of assembling two small sides of the second mode of rea lization,

[0046] [Fig.8A] superimposed sectional view of the large side with tab and the first profile on the small side of the second embodiment,

[0047] [Fig.8B] sectional view of the large side with the tab and of the small side with the complementary profile of the small side of the second embodiment.

[0048] DESCRIPTION OF EMBODIMENTS OF THE INVENTION

[0049] According to [Fig.l], the invention relates to a rectangular thin covering blade 1, made of PVC or HDF, intended for laying in parallel lines. The blade 1 has a pair of long sides and a pair of short sides, each consisting of complementary profiles which make it possible to assemble the long side LG having a tongue to the other long side RG having a groove; the short sides with complementary profiles PA, PB are assembled by clipping when the blade 1 is engaged in an inclined position by its tongue in the groove of a row of blades of the line (n) already laid and it is folded down into the laying plane to engage and hook onto the grooved sides RG of blades of the line (n) already laid; this tilting movement produces the clipping from the small side PB into the small side PA of the homologous profile of the previous blade of the row (n+1) being installed.

[0050] For the purpose of description, according to the (x,y) reference frame drawn, the direction of the laying line corresponds to the (y) direction and the progression of the laying, line by line (n, n+1) is the (x) direction. The direction perpendicular to the laying plane (x,y) is the (z) direction.

[0051] The profiles of the large sides LG, RG are cross-sectional profiles of a blade which is that of the transverse plane PT (plane (x, z)).

[0052] The profiles of the short sides PA, PB are the shapes of the section of the blade by a longitudinal plane PL (plane (y,z)).

[0053] The shape of the profiles of the long sides only allows installation by engagement of the tongue in the groove and tilting in the installation plane, which imposes the direction of installation according to the direction (+y) or (-y) because one of the profiles of the short sides PA, PB projects from the junction plane PJJ of two short sides and the other profile is set back from the junction plane PJJ imposed by the clipping. The short side of the last blade of the row being installed must be the profile projecting (PA side) in the junction plane and the short side PB of the blade which tilts and comes to engage must be a profile not projecting from the junction plane PJJ.

[0054] The shape of the tilting profiles of the large sides LG, RG is that of the profiles shown in FIGS. 2, 2A; the shape of the clipping profiles of the small sides PA1, PB1 or PA2, PB2 is that of FIGS. 3, 3A, 3B, 3C or FIGS. 7A, 7B.

[0055] [Fig.2] shows two blades 1,1' assembled by the profile of the LG side of the blade 1' engaged and blocked in the profile of the RG side of the blade 1, with the indication of the junction plane PJ perpendicular to the laying plane which is that of the bottom 1b.

[0056] The profile of the RG side comprises from top to bottom from the top la to the bottom 1 b of the blade:

[0057] - a high support 11 located in the junction plane PJ,

[0058] - a spout 31 projecting from the junction plane with an inclined top 311 re joining a curve or fillet, and

[0059] - an inclined bottom 312 joining,

[0060] - a horizontal underside 131 forming a support starting with the groove 13, then delimited by:

[0061] - a lower side 133 with a part 134 slightly set back on a projection 12 and Next,

[0062] - a rear ramp 135 constituting on the projection 12, a head 136 and a return towards the below 1b by a truncated edge 121.

[0063] The profile of the large side LG of the blade 1 of shape complementary to that of the side RG comprises from the top to the bottom 1b:

[0064] - a high support 21 in the junction plane PJ continuing with:

[0065] - a sealing cavity 41 set back from the junction plane PJ, delimited by one side upper 411 inclined, a fillet and a lower side 412,

[0066] - a rounded tab 23 with a top 231 forming a support cooperating with support 131,

[0067] * a rounding 232 and,

[0068] * an inclined, flat bottom 233, joining

[0069] - a rear ramp 235 bordering a recess 24, and

[0070] - a truncated edge 221.

[0071] The meeting of the profiles of the LG / RG sides results in:

[0072] - the contact between the high supports 11,21,

[0073] - the contact of the surface 311 of the spout 31 with the bearing surface 411 of the cavity 41, and

[0074] - the contact of the locking support 131 with the top 231 of the tab 23,

[0075] - the contact of the bottom 133 with the inclined bottom 233,

[0076] - the contact of the rear ramps 235 / 135.

[0077] The contact of the rear ramps 235 / 135 pushes the top 231 against the locking support 131 produces the clamping of the beak 31 in the dihedral formed by the surfaces 411 / 311 ensuring the sealing of this assembly.

[0078] The assembly thus achieves:

[0079] - horizontal blocking by contact of supports 11 / 21,

[0080] - vertical blocking on ascent by the contacts of surfaces 131 / 231 and 133 / 233,

[0081] - the contact of the ramps 135 / 235 with the horizontal component and the component vertical compression force,

[0082] - contact 311 / 411 participates through its horizontal and vertical components and ensures waterproofing at the base of the high supports 11 / 21.

[0083] [Fig.2A] schematically shows the engagement movement of the tongue side LG in the groove side RG by tilting the blade 1' into the laying plane:

[0084] - the blade 1' engages in the side of the groove RG by its tongue 23, the top of which 231 slides on the inclined surface 312 and the front underside 234 of the tab slides on the top of the head 136 while the upper edge of the high support 21 comes against the high support 11.

[0085] The movement continues with the combined tilting / sliding of the blade 1', playing on the elasticity of the contact surfaces to continue the engagement of the tab 23 in the cavity 13 until the final position of [Fig.2].

[0086] This tilting / sliding movement of the blade 1' also results in the progressive engagement in the transverse direction (generally horizontal) (x) of the profile of the short side PB in the profile of the short side PA starting near the side RG of the blade 1 already laid; at the start of the tilting, a short length and a short thickness of the profile of the short side PB are first engaged in the profile of the short side PA of the blade already laid in this row to gradually increase until complete engagement over the entire width of the blade 1' and over its entire thickness.

[0087] [Fig.2B] shows a profile variation of [Fig.2] for the underside of the tab 23a and the inclined surface 133.

[0088] To simplify the presentation of this variant, only the parts necessary for understanding will be designated by references and parts specific to this variant will have references homologous to those of the embodiment of [Fig.2] supplemented by the suffix (a).

[0089] Thus, this panel variant differs from panel 1 by the shape of the underside of the tab 23a in its part joining its rear ramp 235.

[0090] The front 233a of the bottom is set back out of contact with the inclined surface 133.

[0091] The contact between the bottom of the tongue 23a and the top of the groove 13 is changed compared to the embodiment of [Fig.2] by the projection 234a to come into the recessed part 134 of the groove 13.

[0092] The contact between the surfaces 134 / 234a towards the rear of the tongue 23a facilitates the engagement of the tongue 23a in the groove 13 and reinforces and stabilizes the effect of the contact between the rear ramps 135 / 235.

[0093] Figures 3, 3A show a first embodiment of the profiles of the pair of short sides PA1, PB1 of the blade 1. These profiles are defined relative to the junction plane PJJ of the short sides, perpendicular to the laying plane.

[0094] According to the longitudinal sectional view of [Fig.3], the profile of the first small side PA1 is in the form of a hook protruding from the junction plane PJJ and extending by a projection 53 rising by a head 54 and comprising from the top 1a to the bottom 1b:

[0095] - a high support 51 in the junction plane PJJ, followed in this plane by

[0096] * a zone of notches 52 joining in the projection 53 terminated by the

[0097] head 54,

[0098] ** a cavity 531 bordered by

[0099] ** a stop side 532 followed by

[0100] ** a guide ramp 533 going up on

[0101] - head 54 with

[0102] * a top 541 and

[0103] * a descending surface 542 practically parallel to the junction plane PJJ re joining the bottom 1b by a truncated edge 543.

[0104] According to [Fig.3A], the notch zone 52 comprises:

[0105] - two successive notches E1, E2 each with:

[0106] * a retaining side 521 very inclined relative to the junction plane PJJ then

[0107] * a slope 522 oriented towards the junction plane PJJ.

[0108] - on head 54:

[0109] * the stop side 532 is very slightly inclined relative to the junction plane PJJ or even parallel to it, and

[0110] * the guide ramp 533 makes an open angle in particular close to 45° with respect to to the PJJ junction plan.

[0111] The profile of the second small side PB 1 in the form of an inverted hook below the junction plane PJJ and complementary to the profile of the small side PA1 comprises, going from above 1a to below 1b:

[0112] - a high support 61 in the junction plane PJJ,

[0113] - a notch zone 62 of a shape complementary to that of the notch zone 52, exceeding the PJJ junction plan,

[0114] - a plug 63 of shape 631 complementary to that of the cavity 531 for go back up into a recess 64 delimited by

[0115] * the stop side 632 followed by

[0116] * a ramp 633 of shapes complementary to those of the stop side 532, and of the ramp 533 to join

[0117] - a background 641 and,

[0118] - a descending surface 642 practically parallel to the junction plane PJJ,

[0119] * the bottom 641 and the descending surface 642 leaving an interval to the shape of the top 541 and the descending surface 542 to join the bottom 1b by

[0120] - a truncated edge 643.

[0121] The notch zone 62 is composed of a succession of two notches C1, C2 of triangular shape each having a retaining side 621 very inclined relative to the junction plane PJJ and a slope 622, slightly inclined towards the junction plane PJJ.

[0122] The zones 52, 62 of the profiles of the short sides PA1, PB1 are presented in section on a very enlarged scale in [Fig.3A] showing the detail of the notches E1, E2 and the notches C1, C2 of complementary shape.

[0123] The triangular shape of a notch E1, E2 is composed of the retaining side 521 making an angle (a) relative to the junction plane PJJ joining a slope 522 of angle (|3) relative to the junction plane PJJ.

[0124] For example:

[0125] the thickness of the blades is between 7 mm and 14 mm,

[0126] the angle (a) is of the order of 50° to 80°,

[0127] the angle (|3) is of the order of 7° to 12°,

[0128] the fillets have radii of the order of 0.15 mm to 0.3 mm.

[0129] The retaining side 521 connected to the high support 51 by a fillet 521a joins the slope 522 by a 522a leave.

[0130] This same structure is found on notch E2.

[0131] The shape and size of the notches E1, E2 is not necessarily identical; the notch E2 may be larger or smaller than the notch E1, but the orientation of the sides 521 and the slopes 522 is at least similar.

[0132] The homologous shape of the notches C1, C2 of the second small side PB 1 corresponds to that of the first small side PA1 by its components: the retaining side 621 connected to the high support 61 and its slope 622 have the same positive profile as the notch Elet its complementary components 521, 522 of the small side PAL

[0133] The same applies to the C2 notch.

[0134] The correspondence of the shapes is imposed for the efficiency of the assembly of the short sides and may require that the fillets 521a, 522a and 621a, 622a leave between them a clearance to receive the abrasion dust which may remain on the profiles or form during assembly because the materials of the blades are based on particles or may have dust coming from the machining of the profiles.

[0135] [Fig.3B] shows a profile variant of the notch zone 62 and the notch zone 52. In this variant, the profile of the retaining side 521, 621 is formed by the junction of circular arcs forming the fillets 521a / 522a or 621a / 622a which join directly without a straight segment. Whereas in the profile of [Fig.3A], the circular arcs forming the fillets join a straight segment forming the side 521, 621 to which these arcs are, by definition, tangent, this common tangent is retained here but its length is limited to the junction point of the two fillets 521a / 522a or 621a / 622a.

[0136] In the variant, the two circular arcs thus form the retaining side 521, 621.

[0137] The greatly enlarged scale diagram of [Fig.3B] which represents both the profile of the notch zone 52b, but also its complement, the homologous profile of the notch zone 62b shows the position of the pairs of centers 01, 02 or 03, 04 of the arcs of circle of radius RI, R2. These circles, except that of center 01, starting from the high support 51, 61 have the same radius, for example R2=0.25 mm and that tangent to the high support 51, 61, a reduced radius Rl=0.20 mm. In this variant, the retaining side 521, 621 will have, by definition as slope, that of the common tangent to the junction point J which is also the inflection point. The unreferenced junction point J is located on the straight line passing through the pairs of centers 01, 02 or 03, 04; the tangent to this junction point J is perpendicular to the straight line of the centers.

[0138] [Fig.3C] shows the assembly of the short sides PA1, PB1 of two successive blades 1 in a laying line; it shows the close interlocking of the complementary profiles in the junction zone of the high supports 51, 61 and the zones of notches 52 and notches 62 blocking the penetration of humidity.

[0139] The profiles also provide a tight junction of the shape 631 of the plug 63 in the cavity 531 of the projection 53.

[0140] The close contact between the profiles is favored by the gap left between, on the one hand, the top 541 and the descending surface 542 of the head 54 and, on the other hand, the bottom 641 and the descending surface 642 of the recess 64.

[0141] [Fig.3D] shows an engagement step during installation of the small side PB1 of the blade 1 in the small side PA1 of the blade 1' already installed in the same installation line.

[0142] The assembly movement is the tilting movement described using [Fig.2A].

[0143] The notches of the area 62 slide on the notch area 52 and the edge between the curved shape 631 and the stop segment 632 slides on the guide ramp 533.

[0144] The resistance opposed by the profile of the small side PA1 slightly deforms the end of the blade 1 near its small side PB1 as is shown diagrammatically by the inclination of the top 1b which should be parallel to the bottom 1b of the blade 1' because the blade 1 tilts around its large side LG.

[0145] Figures 4A and 4B show, by transparency, the superposition of the small sides PA1 and PB1 on the LG side of the blade 1 and in particular the horizontal locking top 231 of the tongue 23 and the cavity 4L

[0146] The profiles of the long sides are machined first and then the profiles of the short sides are machined on them, taking advantage of the projection formed by the tab 23 for the two profiles of the short sides PA1, PA2 and thus increasing the contact surface of the areas of the notches and those of the notches. The parts removed by machining are grayed out.

[0147] [Fig. 5] shows a profile variant of [Fig. 3] which differs therefrom only in the shape of the top 541a of the head 54 and that of the bottom 641a of the cavity 64. These two surfaces are inclined to facilitate machining and engagement of the profiles. Machining can thus be carried out with only two tools instead of the three required for the profile of [Fig. 3]. Only the modified parts of this variant and the elements on which they depend are referenced in this [Fig. 5].

[0148] [Fig.6] shows an embodiment of the short sides PA2, PB2 of the blade 1, the overall hook shape of the second short side PB2 of which clearly protrudes from the junction plane PJJ and comprises a single notch C3 and the other short side PA2 in the shape of an inverted hook, set back from the junction plane PJJ, comprises a single notch E3.

[0149] Thus, starting from the top 1a towards the bottom 1b, the blade 1” comprises for:

[0150] A) the first small side PA2 with notch:

[0151] a high press 81 followed by,

[0152] a triangular-shaped notch area 72 with

[0153] * a slope 722 connected by

[0154] * a 721a leave with

[0155] * a retaining side 721 connected by

[0156] * a 723a leave with

[0157] * another slope 723 formed on

[0158] - a plug 83 having

[0159] * a form 831 continuing with

[0160] * a ramp 833 going up in

[0161] - a recess 84 of which

[0162] * background 841 continues with

[0163] * a descending surface 842 parallel to the junction plane PJJ and ending with

[0164] * a truncated edge 843,

[0165] B) the second small side PB2 with notch:

[0166] - a high press 71 followed by:

[0167] - a triangular-shaped notch zone 82 having

[0168] * a slope 822 preceded by

[0169] * a hollow 822a fillet and connected by

[0170] * an 821a leave with

[0171] * a retaining side 821

[0172] * a leave 823a with

[0173] * another slope 823 joining

[0174] - an extension 73 having

[0175] * a cavity 731 continuing with

[0176] * a ramp 733 going up on

[0177] - head 74 of which

[0178] * the top 741 continues with

[0179] * a descending surface 742 parallel to the junction plane PJJ and ending with

[0180] * a truncated edge 743.

[0181] The pairs of fillets 721a, 723a and 821a, 823a are, like the fillets of the previous embodiment, circular arcs which, alternatively, meet at a junction point with a common tangent to produce a curvilinear reference side 721, 821.

[0182] [Fig.6A] shows the assembled state of the short sides PA2 / PB2 achieving tight contact

[0183] - in the upper part between the high supports 81.71,

[0184] - notch E3 and notch C3 by

[0185] * the contact of the retaining sides 721 / 821

[0186] - the plug 83 and the advance 73 by

[0187] * the contact between the shape 831 and the cavity 731.

[0188] Figures 7A, 7B show two stages of engagement by clipping the short side PB2 in the small side PA2 and the different contact points up to the final attachment shown in [Fig.ôA].

[0189] Figures 8A, 8B show, by superposition, the profiles of the short sides PA2, PB2 on the LG profile.

[0190] They highlight the use of the relief of the nose 23 of the large side LG to increase the contact surfaces of the small sides PA2, PB2 with each other.

[0191] The process of manufacturing the sides of the blades consists of machining these profiles.

[0192] In summary, the invention relates to a thin rectangular blade of coating in PVC, HDF for in-line installation having: a pair of long sides, one of which is a LG tongue side and the other a RG groove side, to be assembled in parallel lines, long side against long side and short side against short side, by assembly by engagement and tilting of the tongue of the blade to be installed in the groove of a blade already installed, with their complementary profiles;

[0193] the small sides have hooking profiles which are assembled by the small side of the blade to be laid to the small side of complementary shape of the blade laid in the same laying line, by the tilting movement of the blade around the large side with tab LG.

[0194] The large tabbed side LG has a profile relative to the junction plane of two assembled blades comprising:

[0195] - a high support 21 in the junction plane,

[0196] - a locking tab 23 under the upper support 21, projecting from the junction plane PJ with a top 231 and an inclined bottom 234 joining a cavity 24 set back from the junction plane PJ and one side of which forms a truncated edge 221 down to the bottom 1b.

[0197] The large grooved side RG, with a profile complementary to the profile of the tongued side LG, comprises:

[0198] - a high support 11 to come against the high support 21, on the other large side (LG),

[0199] - a groove 13 under the upper support 11, delimited by a locking support 131 and a lower side 133 extending by

[0200] - a head 14 coming to bear in the cavity 24 to push and retain the tab 23 in groove 13.

[0201] The blade is characterized in that

[0202] a) under its high support 21 and above its tab 23, the large side LG has a sealing cavity 41 set back from the junction plane PJ and opening into it,

[0203] - the sealing cavity 41 has a triangular section delimited by:

[0204] * an upper support side 411,

[0205] * a lower clearance side 412 extending through the top 131 of the tab 23 forming a locking top 23;

[0206] b) under the high support 11 and the locking support 131 of the groove 13, the large side RG comprises a triangular beak 31 protruding from the junction plane PJ and having on the top, a contact surface 311 joining the upper support 11 and on the bottom, a guide surface 312 joining the locking support 13 of the groove 13;

[0207] - The spout 31 comes into the sealing cavity 41 with its contact surface 311 against the upper support side 411 of the cavity 41,

[0208] * The locking top 231 comes into contact against the locking support 131 from groove 13,

[0209] * the rear ramp 235 forms one side of the recess 24 coming to bear against the rear ramp 135 of the groove 13 to retain the tongue 23 engaged in the groove 13 and maintain the contact of the high supports 11 / 21, that of the spout 31 in the sealing cavity 41 and that of the locking top 231 against the locking support 131.

[0210] The blade is further characterized in that the locking support 131 of the groove 13 and the locking top 231 of the tongue 23 are parallel to the top 1a and the bottom 1b of the blade 1.

[0211] In this blade, the profiles of the short sides PA1, PB1 have: on the first short side PA1 a hook shape comprising a projection 53 and a head 54, extended beyond the junction plane PJJ of the short sides,

[0212] - on the second short side PB1, a complementary shape of inverted hook, in removal of the PJJ junction plan from the short sides,

[0213] the profile of the first small side PA1 comprises from the top to the bottom 1b:

[0214] - a high support 51 extended by - a zone of notches 52 set back from the plane of junction PJJ, continuing with a cavity 531 in the projection 53 and followed by the head 54 bordering the cavity 531 by a stop side 532 rising on the head 54 by a guide ramp 533 up to the top 541 of the head 24 whose contour descends towards the bottom 1b by a descending surface 542; the profile of the second small side PB1, complementary to that of the first small side PA1 comprises, from the top to the bottom 1b: a high support 61 extended by a zone of notches 62 projecting from the junction plane PJJ continuing with a plug 63 delimited by a shape 631 complementary to that of the cavity 531 of the projection 53 and bordered by a stop segment 632 rising towards a slope 633 to a bottom 641 of the recess 64 delimited by a descending surface 642 parallel to the junction plane PJJ, the plug 63 is embedded in the cavity 531 of the extension 53 in contact with the stop side 532 and the ramp 533 respectively by the stop segment 632 and the slope 633..

[0215] According to another characteristic, the front of the underside of the tongue 23a has a rounding 233a set back relative to the inclined underside 133 of the cavity 13 and the projection 234a comes into the set back part 134 of the groove 13.

[0216] In particular, the notch zone 62, 82 comprises at least one notch C3 and preferably two notches C1, C2, the notch zone 52, 72 comprises at least one notch E3 and preferably two notches E1, E2, the notches C1-C3 have a triangular shape with a retaining side 621, 821 very inclined (angle a) relative to the junction plane PJJ and a slope 622, 822 slightly inclined (angle |3) relative to the junction plane PJJ;

[0217] - this succession of retaining sides (621, 821) / slopes 622, 822 repeating for each notch C2 of the succession of notches of the notch zone 62 between the upper support 61 and the curve 631, 831 of the cap 63, 83,

[0218] - the notches E1-E3 of complementary shape have a triangular section starting with a retaining side 521, 721 following the high support 51,71, very inclined at angle (a) relative to the junction plane PJJ and a slope 522, 722 slightly inclined (angle |3) relative to the junction plane PJJ.

[0219] According to another characteristic, the profiles of the notch zone 52 and the notch zone 62, formed by the retaining sides 521, 621 and the slopes 522, 622 are connected to the high support 51, 61 by a fillet 521a, 621a and the retaining sides and the slopes or the slopes are connected by fillets 521a, 621a and 522a, 622a.

[0220] In particular, the fillets 521b 621b / 522b 622 at the two ends of the retaining side 521, 621 are circular arcs which meet at a junction point J with a common tangent to form a curvilinear retaining side whose inclination is that of the common tangent at their junction J.

[0221] In this blade the angle (a) is between 50° and 80°,

[0222] the angle (|3) is between 7° and 12°.

[0223] In particular, the notches C1, C2 of a notch zone 62 are identical and the notches E1, E2 of a notch zone 52 are identical and of a shape homologous to that of the notches.

[0224] According to another characteristic, the upper part of the large sides LG, RG comprising the high supports 11, 21 and the tongue / groove 13, 23 correspond substantially to half the thickness of a blade, and the upper part of the small sides PA1, PA2 comprising the high supports 51, 61 and the zone of notches 62, 82 / notches 52, 72 correspond substantially to half the thickness of a blade.

[0225] It should be emphasized that redundant references of the different embodiments will only be repeated occasionally so as not to overload the presentation of the claims.

[0226] NOMENCLATURE OF MAIN ELEMENTS

[0227] (numeric references without alphabetical suffix unless necessary)

[0228] 1, 1 Rectangular blade

[0229] Above

[0230] 1b Below

[0231] PJ Plan of junction of the long sides

[0232] PJJ Plan for joining the short sides

[0233] RG Large grooved side

[0234] 11 High support

[0235] 111 Hanging notch

[0236] 12 Advance

[0237] 121 Truncated edge

[0238] 13 Groove

[0239] 131 Locking support

[0240] 133 Lower side

[0241] 134 Recessed part

[0242] 135 Rear ramp

[0243] 14 Head

[0244] 141 Above

[0245] 142 Descending surface

[0246] 31 Bec

[0247] 311 Contact surface

[0248] 312 Guide surface

[0249] LG Large side tab

[0250] 21 High support

[0251] 23 Tab

[0252] 231 Locking top

[0253] 232 Clearance

[0254] 233 Rounded

[0255] 233a Rounded off top 133

[0256] 234 Sloping bottom

[0257] 234a Bottom without contact with the lower side 133

[0258] 235 Rear ramp

[0259] 236 Head

[0260] 24 Hollowing

[0261] 41 Sealing cavity

[0262] 411 Upper support side

[0263] 412 Lower side of the clearance cavity

[0264] PA1 Small notched side

[0265] 51 High support

[0266] 52 Notch Zone

[0267] The Notch

[0268] E2 Notch

[0269] 521 Retaining side

[0270] 522 Slope

[0271] 53 Advance

[0272] 531 Cavity

[0273] 532 Stop side

[0274] 533 Guide ramp

[0275] 54 Head

[0276] 541 Above

[0277] 542 Descending surface

[0278] 543 Truncated edge

[0279] PB1 Small notched side

[0280] 61 High support

[0281] 62 Notch Zone

[0282] Cl Cran

[0283] C2 Cran

[0284] 621 Retaining side

[0285] 622 Slope

[0286] 63 Cork

[0287] 631 Shape of the cap

[0288] 632 Stop segment

[0289] 633 Slope

[0290] 64 Hollowing

[0291] 641 Background

[0292] 642 Descending surface

[0293] 643 Truncated edge

[0294] PA2 Small notched side

[0295] 81 High support

[0296] 72 Notch area

[0297] E3 Notch

[0298] 721 Retaining side

[0299] 722 Slope

[0300] 722a Leave

[0301] 723 Slope

[0302] 83 Cork

[0303] 831 Shape of the cap

[0304] 832 Recessed side

[0305] 833 Slope

[0306] 84 Hollowing

[0307] 841 Background

[0308] 842 Descending surface

[0309] 843 Truncated edge

[0310] PB2 Small notched side

[0311] 71 High support

[0312] 82 Notch Zone

[0313] Cl Cran

[0314] 822a Leave

[0315] 822 Slope

[0316] 821 Retaining side

[0317] 823 Slope

[0318] 73 Advance

[0319] 731 Cavity

[0320] 733 Guide ramp

[0321] 74 Head

[0322] 741 Above

[0323] 742 Descending surface

[0324] 743 Truncated edge

Claims

Claims

1. Thin rectangular PVC, HDF cladding strip for in-line installation having: a pair of long sides, one of which is a tongue side (LG) and the other a groove side (RG), to be assembled in parallel lines, long side against long side and short side against short side, by assembly by engagement and tilting of the tongue of the strip to be installed in the groove of a strip already installed, with their complementary profiles, the short sides have hooking profiles which are assembled by the short side of the strip to be installed to the short side of complementary shape of the strip installed in the same installation line, by the tilting movement of the strip around the long tongue side (LG), A.the large tongue side (LG) has a profile relative to the joining plane of two assembled blades comprising: - a high support (21) in the joining plane, - a locking tab (23) under the high support (21), projecting from the joining plane (PJ) with a top (231) and an inclined bottom (234) joining a cavity (24) set back from the joining plane (PJ) and one side of which forms a truncated edge (221) down to the bottom (1b). B. the large grooved side (RG), with a profile complementary to the profile of the tongued side (LG), includes: - a high support (11) to come against the high support (21), on the other large side (LG), - a groove (13) under the upper support (11), delimited by a locking support (131) and a lower side (133) extending by - a head (14) resting in the cavity (24) to push and retain the tongue (23) in the groove (13). The blade characterized in that a) under the upper support (21) and above its tongue (23), the large side (LG) has a sealing cavity (41) set back from the junction plane (PJ) and opening into it, - the sealing cavity (41) having a triangular section delimited by * an upper support side (411), * a lower release side (412) extending through the top (131) of the tab (23) forming a locking top (231); b) under the upper support (11) and the locking support (131) of the groove (13), the large side (RG) has a triangular beak (31) protruding from the junction plane (PJ) and having on the top, a contact surface (311) joining the upper support (11) and on the bottom, a guide surface (312) joining the locking support (131) of the groove (13); - the spout (31) coming into the sealing cavity (41) with its contact surface (311) against the upper support side (411) of the cavity (41), * the locking top (231) comes into contact against the locking support (131) of the groove (13); * the rear ramp (235) forms one side of the recess (24) bearing against the rear ramp (135) of the groove (13) to retain the tongue (23) engaged in the groove (13) and maintain contact between the upper supports (11 / 21), that of the spout (31) in the sealing cavity (41) and that of the locking top (231) against the locking support (131).

2. Blade according to claim 1, characterized in that the locking support (131) of the groove (13) and the locking top (231) of the tongue (23) are parallel to the top (la) and the bottom (1b) of the blade (1).

3. Blade according to claim 1, characterized in that the profiles of the short sides (PA1, PB1) have: - on the first short side (PA1) a hook shape comprising a projection (53) and a head (54), extended beyond the junction plane (PJJ) of the short sides, - on the second short side (PB1), a complementary shape of inverted hook, set back from the junction plane (PJJ) of the short sides, a) the profile of the first short side (PA1) comprises from the top (la) to the bottom (1b): - a high support (51) extended by - a zone of notches (52) set back from the junction plane (PJJ), continuing with * a cavity (531) in the projection (53) and followed by - the head (54) bordering the cavity (531) by * a stop side (532) going up on the head (54) by * a guide ramp (533) up to the top (541) of the head (24) whose contour descends towards the bottom (1b) by * a descending surface (542), b) the profile of the second short side (PB1), complementary to that of the first short side (PA1) includes, from the top (la) to the bottom (1b): - a high support (61) extended by - a zone of notches (62) projecting from the junction plane (PJJ) continuing with - a plug (63) delimited by * a shape (631) complementary to that of the cavity (531) of the projection (53) and bordered by * a stop segment (632) going up towards * a slope (633) up to * a bottom (641) of the recess (64) delimited by * a descending surface (642) parallel to the junction plane (PJJ), c) the plug (63) is embedded in the cavity (531) of the extension (53) in contact with the stop side (532) and the ramp (533) respectively by the stop segment (632) and the slope (633).

4. Blade according to claim 3, characterized in that the front of the underside of the tongue (23a) has a rounding (233a) set back from the inclined underside (133) of the cavity (13) and the projection (234a) comes into the recessed part (134) of the groove (13).

5. Blade according to claim 3, characterized in that - the notch zone (62, 82) comprises at least one notch (C3) and preferably two notches (Cl, C2), - the notch zone (52, 72) comprises at least one notch (E3) and preferably two notches (E1, E2), - the notches (C1-C3) have a triangular shape with a retaining side (621, 821) very inclined (angle a) relative to the junction plane PJJ and a slope (622, 822) slightly inclined (angle |3) relative to the junction plane PJJ, - this succession of retaining sides (621, 821) / slopes (622, 822) repeating for each notch (C2) of the succession of notches of the notch zone (62) between the high support (61) and the curve (631, 831) of the cap (63, 83), - the notches (E1-E3) of complementary shape having a triangular section starting with a retaining side (521, 721) following the high support (51, 71), very inclined at angle (a) relative to the junction plane (PJJ) and a slope (522, 722) slightly inclined (angle |3) by report to the junction plan (PJJ).

6. Blade according to claim 5, characterized in that the profiles of the notch zone (52) and the notch zone (62), formed by the retaining sides (521, 621) and the slopes (522, 622) are connected to the high support (51, 61) by a fillet (521a, 621a) and the retaining sides and the slopes or the slopes are connected by fillets (521a, 621a and 522a, 622a).

7. Blade according to claim 6, characterized in that the fillets (521b (621b)) / (522b (622b)) at the two ends of the retaining side (521, 621) are circular arcs which meet at a junction point (J) with a common tangent to form a curvilinear retaining side whose inclination is that of the common tangent at their junction (J).

8. Blade according to claim 5, characterized in that the angle (a) is between 50° and 80°, the angle (|3) is between 7° and 12°.

9. Blade according to claim 5, characterized in that the notches (Cl, C2) of a notch zone (62) are identical and the notches (El, E2) of a notch zone (52) are identical and of a shape homologous to that of the notches.

10. Blade according to claim 1, characterized in that the upper part of the large sides (LG, RG) comprising the high supports (11, 21) and the tongue / groove (13, 23) correspond substantially to half the thickness of a blade, - the upper part of the small sides (PA1, PA2) comprising the high supports (51, 61) and the notch zone (62, 82) / notches (52, 72) correspond substantially to half the thickness of a blade.

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