FR2594905A1 - JUNCTION PIECE FOR CONNECTING TWO TUBULAR PROFILES CUT TO A GIVING ANGLE BY RECONCILIATION - Google Patents

Abstract

The invention relates to a junction piece of the type comprising a double bracket with pins, one symmetrical outer receiving a spacer screw, the other symmetrical inner one, is truncated on the angle for the support of said screw. spacing. According to the invention, the outer square 2 is rigid and has internal facets 6 substantially parallel to the clamping axis 8, the internal square 5, also rigid, being in contact by its free ends with said facets; this branch of the double bracket has a pin 10 projecting from the outer face 12 of the outer bracket 2, and a boss 11 projecting from the inner face 13 of the inner bracket 5, the bearing contact with the walls of the tubular cavity of the corresponding profile then being provided by said outer face 12 and said boss 11. Application in particular to the production of panel frames, doors, windows or shutters. (CF DRAWING IN BOPI)

Description

The present invention relates to a connecting piece enabling

  to assemble by approximation two tubular or almost tubular sections cut from tabs at a given angle, for the realization of panel frames, doors, windows or shutters. There are already a number of systems for assembling between them two tubular profiles

with approximation of the cuts.

  Among these systems, the focus is on those that make it possible to perform this type of assembly in a single operation, in order to have an implementation that must remain simple and fast, and in particular

  so-called retractable pawn systems.

  Such connecting pieces are of the type comprising a double square with pins, the outer symmetrical, truncated on the angle and generally comprising a tapping adapted to receive a spacer screw, the other inner symmetrical truncated on the angle for the support of said spacer screw, each branch of the double bracket being received in a tubular cavity of the corresponding profile whose outer wall has a light in which can penetrate the associated pin for the approximation

and assembling said profiles.

  Lebrevetfrançais 2 332447describes a piece of junction

  of this type, in which two conical springs are

  placed between the outer and inner brackets, each spring being held in place by a groove of the inner bracket and the recess of a shoulder pin mounted on

  the outer bracket, the free end of the said pin,

  as a shoulder received in the corresponding light of the profile. Such a joining piece has several disadvantages. First, it assumes a set of seven

  parts, whose bulk in thickness remains important.

  Then, maintaining the profiles is not perfect because the contact between the junction piece and outer wall of the cavity of each profile is limited to the shoulder of the corresponding pin. Finally, the points of application of the bearing forces produced for the assembly (bosses of the inner bracket on the one hand, shoulders of the

  the outer bracket (on the other hand) are arranged

  opposite, because of the presence of the springs, therefore in a direction substantially at 45 to that of the

  tightening, which induces an undesirable torque.

  Another illustration of the known techniques can be found in the French patent 2,421,350, which describes a connecting piece whose outer bracket is flexible.

  and lodges playfully in the recess of an integral square.

  mass, the latter square providing the rigidity

  of the assembly. In addition to the machining complication of the brackets, this type of junction piece can in fact fit on tubular sections of large internal dimensions. It should also be noted that the two brackets are completely disjoined in the disassembled state,

  which is an obvious practical disadvantage.

  The object of the invention is to propose a junction piece making it possible to perform, in a single

  operation, a perfect assembly of two tubular profiles

  whose inner cavities can be of different

  especially low, it being understood that the said

  may be closed or not, the tubular term to be

taken in a broad sense.

  Another object of the invention is to provide a joining piece comprising the minimum of components, which are not likely to separate when the piece

is not mounted yet.

  It is more particularly a junction piece for assembling by approximation two sectional tubular sections at a given angle, having a double square with pawns, the outer symmetrical, truncated on the angle and having a means of spacer

  defining a tightening direction, the other inner sym-

  trench, truncated on the angle for the support of said spacer screw, each branch of the double bracket being received in a tubular cavity of the corresponding section whose outer wall has a light in which can penetrate the associated pin for the approximation and assembling said profiles, characterized in that the outer bracket is rigid and has internal facets in the vicinity of the end of each

  of its branches, the plane of said facets being sensi-

  parallel to the tightening direction, the

  inside, also rigid, being in contact by its free ends with said facets, and that each branch of the double bracket has a protruding pin of the outer face of the outer bracket, and a projection protruding from the inner face of the bracket internal, the bearing contact with the outer and inner walls of the associated tubular cavity being respectively provided by said outer face of the outer bracket and said

boss of the inner bracket.

  Preferably, the pin and the boss of each branch of the double square remain located on

  an axis substantially parallel to the plane of the adjacent face

  cente of said branch, which avoids any appearance of an adverse induced torque during the final assembly. For a good distribution of the forces, the pawn of each branch of the double square is provided

  substantially midway from said branch.

  Advantageously, the deflection of the square

  interior in the outer bracket is limited upper-

  by a recessed rim provided at the end of each branch of the outer bracket, which in particular avoids any risk of loss of the inner bracket. In particular, the substantially trapezoidal return flange terminates a return to 90 of the corresponding end of

  the branch of the outer square.

  Preferably, the deflection of the square

  inside the outside bracket is limited

  by the contact of their opposite faces, the bos-

  wise of the inner bracket then protruding slightly from the inner edge of the corresponding end of the branch of the outer bracket, or by the contact of two stops provided on said facing faces, for each branch of the double bracket; this makes it possible to assemble particularly narrow pipe sections without

  impair the safety of the assembly.

  Although it is not limiting, it is expected that the rigid outer and inner brackets

  each form a right angle; likewise, the means of

  For example, it will consist of a screw received in

  a tapping of the outer bracket.

  Other features and advantages of the invention will emerge more clearly in the light of

  the description and accompanying drawings, relating to a

  preferred embodiment, with reference to Figures o: Figure 1 is an elevational view of a connecting piece according to the invention, the inner bracket is in the maximum displacement position;

  Figures 2A and 2B respectively illustrate

  the beginning and the end of the establishment of the

  junction of Figure 1 for a closer assembly

  two tubular sections cut at right angles;

  Figure 3 is an exploded view in perspective.

  of an assembly between two profiles, achievable in a single operation by means of the connecting piece of

previous figures.

  The joining piece illustrated in FIG. 1 essentially consists of a double square 1,

  the symmetrical outer square 2 being truncated on the

  gle and comprising here a tapping 3 adapted to receive a spacer screw 4, the inner symmetrical bracket 5 being also truncated on the angle for the support of said spacer screw. It goes without saying that we could

  use other means of spreading, for example a swiveling cane.

  According to an essential aspect of the invention, the outer square 2 is rigid, and has internal facets 6 in the vicinity of the end of each of its branches 7, the plane of said facets

  being substantially parallel to the axis of the spreader screw

  4 (clamping axis 8), the inner square 5, also rigid, being in contact by the free ends of its branches 9 with the facets 6; each branch of the double square 1 has a peg 10 protruding from the outer face 12 of the outer square 2, and a boss 11 projecting from the inner face 13 of

the interior square 5.

  The joining piece of the invention uses the general principle of the pawl brackets, wherein each branch of the double bracket is reviewed in a tubular cavity of the corresponding section, whose outer wall has a light in which can penetrate the associated pin, for the approximation and the assembly of the tubular profiles. However, as will now be described, the bearing contact with the outer and inner walls of the tubular associated cavity is here ensured respectively by the outer face 12 of the outer bracket 2 and the boss 11 of the inner bracket 5 , this contact support ensuring a maintenance

perfect assembled profiles.

  When it is desired to assemble by

  2 tubular profiles 14 and 14 ', here cuts at right angles, it is sufficient to introduce the branches of the double bracket 1 in the associated tubular cavities 15, 15', the double bracket then preferably being in the minimum deflection position for facilitate the setting

  in place, as illustrated in Figure 2A.

  It should be noted that the facets 6 of the outer bracket 2 provide a hold in place of the inner bracket 5 for all positions of "free expansion" of the double bracket. The internal dimension of the tubing, that is to say the spacing between the outer wall 16, 16 '

  and the inner wall 17, 17 'of the sections 14, 14'

  can be particularly reduced thanks to

  the ultra-flat character of the double square of the invention

  the maximum height (determined by the distance

  between pin 10 and adjacent boss 11) can be

  particularly small, the thickness of the outer brackets

  2 and inner 5, however, must be sufficient to maintain their flexural rigidity. In practice, the maximum height of the double front square

  tightening will be slightly less than the

  of the tubing so as to be easily housed therein, the space between pin 10 and outer wall 16 being exaggerated

  in Figure 2A for clarity.

  Each profile 14, 14 'has, at its outer wall 16, 16', an oblong opening 18, 18 'whose length must be greater than the diameter of the pawns engaging, andan end notch 19, 19' allowing the passage of the spacer screw 4 and the associated clamping tool. The lights 18, 18 'are made so that the distance between their inner edge and the apex of the angle is substantially equal to the distance between the pin and the top of the angle of the outer square, so that when tightening, the pins can come to heel on the canvas profiles. The "free expansion" of the double bracket of the invention during tightening is possible due to the existing gap between the diameter of the pin and the associated oblong slot. When clamping, the pins 10 undergo a translation movement in an oblique direction to arrive at the final position

  of Figure 2B o assembly is complete.

  Preferably, the pin 10 and the boss 11 of each branch of the double bracket remain located on an axis substantially parallel to the plane of the adjacent facet 6 of said branch, which is remembered parallel to the clamping axis 8. This The oblique correspondence is illustrated by the delta interval in FIG. 2B, the result of such an arrangement being that any occurrence of an unfavorable induced torque during the final assembly is avoided. The pin 10 of this branch 7 of the outer bracket 2 is then provided substantially midway from said branch, which ensures, in combination with the bosses 11 of the inner bracket, an excellent distribution of efforts. The displacement of the inner bracket 5 in the outer bracket 2 is limited to a greater extent by a recessed rim 20 provided at the end of each branch 7 of the outer bracket 2, said rim, substantially trapezoidal, ending a return to 90.degree. the corresponding end of said branch. This makes it possible in particular to avoid any risk of loss of the inner bracket before assembly of the joining piece on the profile.

tubular to assemble.

  The deflection of the inner square 5 in

  the outer square 2 is in turn limited lower-

  either by the contact of their facing face, as shown in Figure 2A, or by the contact of stops 21 and 22 formed on their facing face for each branch 7, 9 of the double bracket, the bosses 11 of the inner bracket then protruding slightly from the inner edge of the corresponding end of the branch 7 of

the outside square 2.

  It should be noted that the joining piece of the invention makes it possible to connect two

  tubular or nearly tubular sections cut at different angles

  However, in this case, the principle of internal facets parallel to the clamping axis remains, as well as the other essential characteristic of the invention according to which the bearing contact with the outer walls.

  and internal of the associated tubular cavity is respectively

  ensured by the outer faces of the outer bracket

  and the bosses of the inner square.

  Figure 3 gives an illustration of the position of the part. junction which has just been described and the two tubular sections which said piece ensures the assembly by bringing their cut. The joining piece, comprising only three components, thus makes it possible to perform, in a single operation, a perfect assembly of tubular sections whose inner cavities can be of particularly small dimensions. The extra-flat character of the double square and the perfect assembly that it allows to make represents an important advance in the technique of assembly, in particular with respect to the devices illustrated in the patents.

French cited above.

  The outer and inner brackets forming

  the joining piece has a simple structure

  putting their realization easy from profiles,

  preferably in aluminum, with a minimum of machining.

  The invention is not limited to the mode of

  which has just been described, but encompasses

  milking any variant using equivalent means

  the essential characteristics contained in

claims.

Claims (9)

R E V E N D I C A T I ON   1.- junction piece for assembling by approximation two tubular profiles cut at a given angle, having a double square with pins, the outer symmetrical truncated on the angle and having a spacer molen defining a direction of tightening, the other inner symmetrical truncated on the angle for the support of said spacer means, each branch of the double bracket being received in a tubular cavity of the corresponding section whose outer wall has a light   in which can enter the associated pawn for the rap-   approaching and assembling said profiles, characterized in that the outer bracket (2) is rigid and   has internal facets (6) in the vicinity of the former   the end of each of its branches (7), the plane of said facets being substantially parallel to the clamping direction (8), the inner square (5), also rigid, being in contact by its free ends with said facets, and each branch of the double square has a peg (10) protruding from the outer face   (12) of the outer bracket (2), and a boss (11)   lantdela internal (13) of the inner bracket (5), the bearing contact with the outer and inner walls of the associated tubular cavity being respectively provided by said outer face (12) of the outer bracket (2) and   said boss (11) of the inner bracket (5).   2.- junction piece according to claim 1, characterized in that the pin (10) and the boss (11) of each branch of the double bracket remain located on an axis substantially parallel to the plane of the facet adjacent (6) of said branch.   3.- Connecting piece according to one of the   cations 1 and 2, characterized in that the pin (10) of each branch of the double bracket is provided substantially midway away from said branch.   4.- junction piece according to one of the claims   cations 1 to 3, characterized by the fact that the movement of the   (5) in the outer bracket (2) is limited   a return flange (20) provided at the end of each branch   che (7) of the outer bracket (2).   5.- junction piece according to claim 4, characterized in that the reentrant rim (20), substantially trapezoidal, ends a return 90 of the corresponding end of the branch (7) of the outer bracket.   6.- Connecting piece according to one of the   1 to 5, characterized by the fact that   of the inner bracket (5) in the outer bracket (2) is limited inferiorly by the contact of their facing faces, the bosses (11) of the inner bracket then protruding slightly from the inner edge of the end   corresponding branch (7) of the outer bracket.   7.- Connecting piece according to one of the   cations 1 to 5, characterized in that the clearance of the inner bracket (5) in the outer bracket (2) is limited below by the contact of two stops (21, 22) formed on their facing faces for each branch (7, 9) of the double bracket, the bosses (11) of the inner bracket then protruding slightly from the inner edge of the corresponding end of the branch (7) from the outside square.   8.- Connecting piece according to one of the   1 to 7, characterized in that the two outer (2) and inner (5) rigid brackets form each a right angle.   9.- Connecting piece according to one of the   1 to 8, characterized in that the spacing means is a screw (4) received in a thread of the outside bracket (2).