FR2783554A1 - LINK ELEMENT FOR FRAME PROFILES - Google Patents

Abstract

This connecting element for profiles (2) of window or door frames, which are miter cut and have internal reinforcement bars (3), comprises a socket (7) pluggable into an end portion of the bar reinforcement (3) and comprising integrated clamping sections (10), so that they can be pulled out into the walls (9) of the sleeve and a welding head (15) as well as a clamping insert (8) inserted so as to be able to rotate in the socket and comprising clamping ramps (18) applying to the inner faces of the clamping sections (10) and having surfaces (23) which rise in the opposite direction to the direction of rotation of the insert (8). Application in particular to door or window frames.

Description

i

  LINK ELEMENT FOR FRAME PROFILES

  For the formation of a door or window frame constituted by plastic profiles, it is known to insert, in the profiles of the frame, bars

  reinforcement in steel, aluminum or plastic.

  These reinforcing bars then form a supporting framework for the 1) frame of the door or the window. They can be arranged in tubular form or else consist of L, C or U profiles. The profiles of the frame are cut at the ends at a tab and are assembled by means of welding in

butt by resistance.

  To connect the reinforcement bars together in the area of miter cuts, so-called welding angle fittings are provided. These welding angle fittings are fixed to the reinforcement bars and 2 ′ are welded to the profiles of the frame by means of welding surfaces during resistance butt welding. One type of embodiment, used in practice, of welding angle fittings has projecting end pieces, which can be assembled at the end parts of the reinforcement bars and which are fixed on one side or on two sides. opposite, using corner elements. Due to the inevitable tolerances during the production of the reinforcement bars and also of the welding angle fittings, there is however generally a clearance which is transverse with respect to the fixing plane. So in the case of an assembled door or window frame, this can have the effect that the welding angle fittings can shift transversely, even to a limited extent. This is why we cannot prepare, in this way, a framework perfectly stabilizing a door or window frame and produced by reinforcing bars and corner fittings.

welding.

  In another type of welding angle connection, which is part of the state of the art, four fingers are provided which protrude from a base part and are arranged in the corners being offset from each other 90 (German utility model 14 643). On the end side, the fingers enclose an insert which can be moved using a central screw in the longitudinal direction of the fingers. Since the fingers have bevels on the inside, when the insert is offset, they are pushed radially outwards against the inside surfaces of the reinforcement tube, and the welding angle connection is fixed this way in the reinforcement tube. Despite this comparatively complicated type of embodiment, it can however be obtained with the latter in principle a punctual tightening of the

  fingers against the inner surfaces of the reinforcement tube.

  Such support therefore also does not allow satisfactory fixing of a welding angle fitting in

a reinforcement tube.

  In the context of document DE 42 40 484 C2, there is known a corner connection made of plastic material and serving to establish welded corner connections for plastic frames of windows and doors. For fixing the corner connector in a plastic frame, an edge of a longitudinal part, arranged in the form of a hollow profile, of the corner connector has a groove. After inserting the corner connector into the plastic frame, turn a screw in this groove from the oblique front face. Since the cross section of the groove is reduced from the oblique surface, the corner connector can be fixed by means of a rotation of the cylindrical screw of the groove, resting on the plastic frame. The invention starts from the state of the art to indicate a plastic connecting element for plastic frame profiles which are miter cut at their ends, and include internal tubular reinforcing bars, for the formation of a door or window frame, which not only is easy to manufacture, but also guarantees a perfect connection and without a set of reinforcement bars located

  in respective profiles close to the frame.

  This problem is solved in accordance with the invention thanks to the fact that the connection element comprises a socket which can be inserted in a connection by complementary shapes in an end part of a reinforcing bar adapted to the cross section of a frame profile, and comprising clamping sections, integrated so as to be able to be removed therefrom in the walls of the socket, and comprising a welding head profiled frontally and adapted to the miter arrangement, and that it comprises an insert of clamping which is inserted so that it can rotate in the sleeve and which is applied by peripheral clamping ramps, adjusted to the number of clamping sections, on the inside faces of the clamping sections, the clamping ramps having surfaces which go up in opposite direction to the direction of rotation of

the clamping insert.

  Such a connecting element comprises a socket which can be plugged in according to a connection by complementary shapes to the end part of a tube of 3: reinforcement, as well as a rotary clamping insert, which is introduced into the socket from a front face. The reinforcing bar is arranged with a cross section of polygonal shape, in particular square, in a manner adapted to a frame profile. The bush, which is adapted to the cross-sectional configuration of the reinforcing bar, comprises several clamping sections, which are distributed over the periphery and which are integrated, so as to be able to be pulled out thereof, in recesses in the walls of the socket. When the bushing is plugged into the end portion of the reinforcing bar and the clamping insert has been inserted axially into the bushing, the clamping sections are subject to the influence of the clamping insert. If the clamping insert is then rotated in the opposite direction to the rise of the clamping ramps, the clamping ramps apply a radial force to the clamping section so that they are moved away from the walls and are finally pushed flat against the

  internal abutment surfaces of the reinforcement bar.

  The connecting element is then fixed without play in the reinforcement bar 1i. Then it can be assembled, by means of the welding head profiled frontally, to the connecting element of a neighboring frame profile, in particular by means

  resistance butt welding.

  Besides the secure and play-free tightening of the connecting element 2-, progressive tightening in the reinforcement bar provides the additional advantage that the reinforcement bar does not have to be cut to length precisely . It suffices for this purpose to ensure that it is dimensioned with a length less than the shortest longitudinal side 29 of a frame profile between the miter cuts located at the ends. Likewise deviations on the sides in relation to the manufacturing tolerances of the connecting bar and the connecting element are safely eliminated within the framework of the arrangement according to the invention. After welding in the mitered areas, perfect resistance to

  tearing in each tab part.

  In order to permanently maintain this position in a secure manner also after the rotation of the clamping insert and the clamping of the sleeve in the reinforcement bar, provision is made for the surfaces which are applied to the inner faces of the sections of clamping, clamping ramps have longitudinally oriented ribs. Safely this ribbing makes it possible to secure the clamping ramps to the clamping sections and in this way prevents inadvertent detachment. According to another characteristic, the clamping ramps can form constituents in one piece of the clamping insert. The clamping insert itself has a cylindrical base body. The clamping ramps are arranged being offset from each other by 90 on the periphery, for example in the case of a reinforcing bar of square section. The rise height of the clamping ramps is dimensioned so that the clamping insert is introduced perfectly from the front face of the sleeve, into the latter, and that during the subsequent rotation of the insert clamping, the clamping sections not only deviate from the walls of the 2 'socket, but are also securely pushed back against

  the abutment surfaces of the reinforcing bar.

  According to another characteristic of the invention, the clamping ramps, which are adapted, by means of their internal surfaces, to a cylindrical surface of a base body of the clamping insert, have longitudinal internal clamping ribs , which are inserted in a complementary shape connection in grooves located on the periphery of the base body. Secure support of the clamping ramps in the longitudinal grooves is guaranteed by the fact that both the clamping rim associated with the clamping ramps and the longitudinal grooves preferably have a cross section of trapezoidal shape. An advantageous variant according to 3- the invention lies in the fact that the clamping sections are arranged in the form of bars, and extend in the longitudinal direction of the sleeve. This arrangement provides high surface pressure. The bars

  in particular have a rectangular configuration.

  So that the clamping sections can be disengaged without problems from the walls of the sleeve, the clamping ramps are arranged with a length less than that of the clamping sections. Therefore it is not necessary to move the clamping insert also in a precise manner to a determined position in the socket. If the sleeve has a square cross section, the clamping sections have a thickness which

  corresponds to the thickness of the wall of the socket.

  1% On the contrary, two mutually opposite clamping sections have a thickness which corresponds to the thickness of the wall, while the other two mutually opposite clamping sections have a thickness greater than the thickness of the walls, when

  the cross section of the socket is rectangular.

  The fixing of the clamping sections in position in the walls of the sleeve is guaranteed by at least one set point rupture zone. In other words, this means that the clamping sections are inserted into recesses in the walls and are connected to the walls by means of a set point rupture zone. The setpoint break zones can be provided only on one short side or on the two short sides of the clamping sections. Preferably the rupture zones

  are located at the corners.

  The friction connection of the clamping sections on the abutment surfaces of the reinforcing bar is increased by the use of external surfaces made rough. This roughness can be obtained by means of transverse ribs, having in particular a section

cross-section of triangular shape.

  To rotate the clamping insert, the latter comprises, according to another characteristic of the invention, a centered pivoting protruding appendage which extends in the direction of the welding head. The pivoting protruding appendage is preferably arranged integrally with the base body of the clamping insert. However, he

  can also be connected to the latter in a removable manner.

  Suitably it has a cylindrical configuration. A polygonal indentation is formed in the free front face, for the application of a tool adapted to this indentation. The front face of the pivoting projecting appendage does not extend beyond the welding plane of the

welding head.

  The precise position of the welding head in relation to the frame profiles can be determined even more securely with a welding collar

spanning the periphery.

  Other features and advantages of the

  present invention will emerge from the description given

  hereinafter taken with reference to the accompanying drawings, in which: - Figure 1 shows a schematic front view of a window frame; - Figure 2 shows on a larger scale a section of the corner part II of Figure 1; - Figure 3 shows an exploded representation on a larger scale and also in perspective, a view of the miter area of a profiled frame comprising a reinforcing bar and a connecting element, in accordance with arrow III in the figure 2; - Figure 4 shows a vertical longitudinal section of the object of Figure 3, taken along the line IV-IV before the tightening of a connecting element; - Figure 5 shows a vertical cross section of the object of Figure 4, taken along the line V-V; - Figure 6 shows a vertical longitudinal section of the object of Figure 3, taken along the line IV-IV after tightening of the connecting element; - Figure 7 shows a vertical cross section of the object of Figure 6, taken along the line

VII-VII;

  - Figure 8 shows a representation 13 corresponding to that of Figure 5 in accordance with another embodiment of the clamping insert; - Figure 9 shows a representation corresponding to that of Figure 7 in accordance with another embodiment of the clamping insert; - Figure 10 shows a representation corresponding to that of Figure 5 in accordance with another embodiment of the clamping insert and a modified frame profile with a reinforcing bar and a socket; and - Figure 11 shows a representation, which corresponds to that of Figure 7 according to the first embodiment of the clamping insert and with a modified frame profile with a reinforcing bar

and a socket.

  In Figure 1, there is designated by the reference 1 a window frame formed of four profiles 2 of plastic which are cut at 45 miter at their

  ends and have a square cross section.

  As can also be seen in FIG. 2, the profiles 2 of the frame are crossed by reinforcing bars 3 made of aluminum of tubular shape, of square cross section. Reinforcement bars 3 have a length less than that of the short inner sides 4

profiles 2 of the frame.

  The profiles 2 of the frame are welded at the end by resistance in the tab areas 5. For a backlash-free connection of the reinforcement bars 3, there are inserted in the tab areas 5, plastic connecting elements 6, the un will be described below in more detail with reference to Figures 2 to 7. The connecting element 6 basically consists of a sleeve 7 and a clamping insert 8 which can rotate about its longitudinal axis. The external profile in cross section of the sleeve 7 is adapted to the internal cross section of the reinforcing bar 3 (see in particular FIG. 3). Four clamping sections in the form of bars, which extend in the longitudinal direction and have a rectangular configuration, are integrated, so that they can be removed, in the four walls 9 of the sleeve 7. For this purpose the sections of clamping 10, which have a rough outer surface 11, are simply fixed punctually in the corner parts of the recesses 12, which house these clamping sections, by means of set point rupture zones 13. On the end facing towards inside the reinforcement bar 3, the sleeve 7 has a conical end portion 14, which serves in particular to facilitate the connection by plugging in with the reinforcement bar 3. On the other end, the sleeve 7 has a head profiled welding seam 15 comprising a peripheral welding collar 16, the inclination of which corresponds to the miter arrangement in the

tab part 5.

  The clamping insert 8 has a cylindrical base body 17 comprising four clamping ramps 18 which are arranged in a mutually offset manner by 90 on the periphery of the base body 17, as well as a protruding cylindrical front pivoting appendage 19 The clamping ramps 18 form 3% one-piece constituents of the base body 17. The diameter D of the base body 17 corresponds to a small clearance of width W of the sleeve 7 between the clamping sections 10. For this purpose the sections clamp 10 have a thickness D1, which

  corresponds to the thickness D2 of the walls 9 (Figures 4 and 5).

  In the front face 20 of the pivoting protruding end 19 is provided a hexagonal recess 21 allowing the insertion of an appropriate tool for rotation. The length of the pivoting projecting appendage 19 is dimensioned so that the latter does not project beyond the welding head 15 (FIGS. 3, 4 and 6). When mounting the connecting element 6, the sleeve 7 is first pushed back into the reinforcement bar 3 already inserted in the profile 2 of the frame. The inserted position of the sleeve 7 is then determined by the abutment of the welding collar 16 against the miter bevel 22 of the profile 2 of the frame (see Figures 3, 4 and 6). The clamping sections 10 are still completely retained by the set point rupture zones 13 in the thickness D2 of the

walls 9.

  Then the clamping insert 8 is pushed from the welding head 15 into the socket so that, according to FIG. 5, the clamping ramps 18 are located in the corner areas of the socket 7 between two clamping sections 10. The end position of the clamping insert 8 is determined, in accordance with FIG. 4, by the conical end section 14. In this regard, it can also be seen that the clamping ramps 18 are dimensioned with a length less than that of the clamping sections 10 so that small relative axial offsets of the clamping insert 8 relative to the sleeve 7 have no effect on the effective position of the clamping ramps 18 relative to the clamping sections 10. If the clamping insert 8 is then rotated in accordance with the arrow FF in FIG. 5, the surfaces 23 of the clamping ramps 18, which rise in the opposite direction to the direction of rotation of the clamping insert 8, are repelled cont re the inner sides 2 of the clamping sections 10 and offset the latter radially outward in accordance with the representations of FIGS. 6 and 7, the connections of the clamping sections 10 with the walls 9 being detached at the level of the set point rupture zones 13 The inclination of the surfaces 23 of the ramps of 1, clamping 18 must be dimensioned so that the clamping sections 10 apply, by their rough outer surfaces 14 against the resistant inner surfaces 25 of the reinforcing bar 3. A rotation additional clamping insert 8 beyond this 1 clamping position is prevented by the longitudinal ribs, which are visible in Figures 3, 4 and 6 and are present on the surfaces 23 of the clamping ramps 18. These grooves bite to some extent in

clamping sections 10.

  In this way the sleeve 7 is tightened perfectly in the reinforcement bar. Then the connection of two profiles of a frame 2 which are abutting in the tab area 5, can be achieved by means of a

resistance butt welding.

  In Figures 8 and 9, there is shown an embodiment of a clamping insert 8a in connection with a frame profile 2 of square cross section and a reinforcing bar 3 of corresponding square section as well as a square socket 7 , the base body 17a being at

  again arranged with an essentially cylindrical shape.

  Generally the clamping ramps 18a are not

  then not connected in one piece to the base body 17a.

  The clamping ramps 18a, which are adapted, by their internal surfaces 26, to the cylindrical surface 22 of the 3% base body 17a have longitudinal internal clamping ribs 28 having a trapezoidal cross section and which are inserted in a form connection complementary in trapezoidal grooves 29 adapted to the clamping ribs 28, on the periphery of the base body 17a. Otherwise, the embodiment of Figures 8 and 9 corresponds to that of Figures 1 to 7, so that it is unnecessary to repeat the operation again. To be complete, it is indicated that FIG. 8 represents the clamping insert 8a provided with clamping ramps 18a when the sleeve 7 is in the non-tightened state, and that FIG. 9 represents the insert of

  tightening when the bushing is in the tightened state.

  Figures 10 and 11 show on the one hand the embodiment of Figures 8 and 9 and on the other hand the embodiment of Figures 1 to 7. The clamping insert 8a, 8 in connection with a frame profile 2a of rectangular cross section, a connecting bar 3a of corresponding rectangular shape as well as a socket 7a, which is adapted to this reinforcing bar and has a 2) rectangular cross section. Since the walls 9, 9a of the sleeve 7a have different widths, as regards the clamping insert 8, 8a it is however a body of revolution, and it is necessary to equip the sections clamp 10a in the walls 9a, dimensioned so as to be narrower, of the sleeve 7a with a thickness D3, which is greater

has the thickness D2 of the walls 9, 9a.

  This concerns both the type of embodiment of a clamping insert 8a comprising clamping ramps 3) 18a inserted on the periphery in grooves 29 (figure) as the case of the embodiment of Figure 11, in which clamping ramps 18 form

  components in one piece of the clamping insert 8.

  Similarly with regard to FIGS. 10 and 11, it must be indicated for completeness that FIG. 10 represents a position of the clamping insert 8a when the sleeve 7 is in the loose state, and that FIG. 11 represents the position of a clamping insert 8 when the

socket is in a tight state.

Claims (12)

  1. Plastic connecting element for plastic frame profiles (2, 2a), the ends of which are cut with a miter (5) and have internal tubular reinforcement bars (3,3a) and have a cross section polygonal, for the formation of a door or window frame (1), characterized in that it comprises a socket (7, 7a) which can be inserted in a connection by complementary shapes in a part 1) at the end of a reinforcing bar (3.3a) adapted to the cross section of a frame profile (2.2a), and comprising clamping sections (10.1Oa), integrated so that they can be removed from the walls ( 9,9a) of the socket, and comprising a front profiled welding head and adapted to the miter arrangement (5), and that it comprises a clamping insert (8,8a) which is inserted so as to be able to rotate in the sleeve (7,7a) and which is applied by peripheral clamping ramps (18 , 18a), adjusted on the number of clamping sections (10,10a), on the inner faces (24) of the clamping sections (10,10a), the clamping ramps (18,18a) having surfaces (23) which go up in opposite direction of the sense of   rotation (PF) of the clamping insert (8.8a).   2. Connecting element according to claim 1, characterized in that the surfaces (23), which are applied on the inner faces (24) of the clamping sections (10,10a), clamping ramps (18, 18a) have   longitudinally oriented ribs.   3. Connection element according to one or other of the   claims i and 2, characterized in that the ramps   clamp (18) form one-piece components of the insert tightening (8).   4. Connection element according to one or other of the   Claims 1 and 2, characterized in that the ramps   clamping (18a), which are adapted, by means of their inner surfaces (26), to a cylindrical surface (27) of a base body (17a) of the clamping insert (8a), have longitudinal internal ribs clamps (29), which are inserted in a complementary shape connection in grooves (29) located on   the periphery of the base body (17a).   5. Connecting element according to any one of   Claims 1 to 4, characterized in that the sections of   clamping (10,10a) are arranged in the form of bars and extend in the longitudinal direction of the sleeve (7,7a). 6. Connecting element according to any one of   claims 1 to 5, characterized in that the ramps   clamps (18,18a) are arranged with a shorter length   to that of the clamping sections (10, 10a).   7. Connecting element according to any one of   Claims 1 to 6, characterized in that the sections of   clamping (10) have a thickness (D1), which corresponds to the thickness (D2) of the walls (9) of the sleeve (7), when   the cross section of the sleeve (7) is square.   8. Connecting element according to any one of   Claims 1 to 6, characterized in that two sections   of clamping (10), which are reciprocally opposite, have a thickness (D1) which corresponds to the thickness (D2) of the walls (9) and that the two other clamping sections (10a) reciprocally opposite, have a thickness (D3 ) greater than the thickness (D2) of the walls (9a), when the   cross section of the sleeve (7a) is rectangular.   9. Connecting element according to any one of   Claims i to 8, characterized in that the sections of   clamping (10,10a) are retained by means of set point rupture zones (13) in the walls (9,9a) of the sockets (7,7a). 10. Connecting element according to any one of   3% claims 1 to 9, characterized in that the sections of   clamp (10,10a) have exterior surfaces rough (11).   11. Connecting element according to any one of   Claims 1 to 10, characterized in that the insert of   clamp (8.8a) has a centered protruding appendage   pivoting (9), which extends to the welding head (15).   12. Connecting element according to any one of   claims 1 to 11, characterized in that the head   welding (15) has a welding collar (16) located on its periphery.