Corner joint for joining profiles

Abstract

 A corner joint for connecting profiles contains a corner element embedded in chambers of profiles being connected (10, 20) and joining elements by means of which the corner element (30) is immobilised in relation to profiles being connected. The corner element is of shape of a joining block (30), which with one end is embedded in the chamber (12) of the first profile (10) and with the other end is embedded in a cut-out (121) made in the internal wall (127) of the second profile (20) and adjoins the middle wall (27) of the second profile (20) with the front surface (33), while the middle wall (77) of the second profile (20) is pressed to the front surface (33) of the joining block (30) by means of the first joining element determining the position of the joining block (30) in relation to the second profile (20), which is a screw (50), which goes through a through hole (25) made in the middle wall (27), and which is screwed into the threaded opening (31) made in the joining block (30) in the front surface side (33), and the position of the joining block (30) in relation to the first profile (10) is determined by means of the second joining element, which is a screwable element (70) going through a through hole (14) of the internal wall (115) of the first profile (10), and which is screwed into a threaded opening made in the joining block (30) in the side of the surface adjoining the internal wall of the first profile (10).

Description

[0001] The subject matter of the invention is a corner joint for joining profiles from which windows, doors, shutters and facade structures are made.

[0002] Typical windows and door frames made of plastic profiles, e.g. PVC, consist of four elements cut at a specific angle and welded together. Plastic profiles may be strengthened with metal elements.

[0003] In other solutions, profiles are connected together by means of corners. For example, from the patent description of PL 193379 B1 entitled: "Kit for an angle joint of plastic hollow section" a kit is known for angle connection of plastic hollow profiles, which are ended at least partially with a cant situated in the cant plane and contain adhesive and plastic inserts in the form of bodies for joining hollow profiles in their cant. Plastic inserts are embedded at least partially in metal chambers. On the insert member, recesses in the form of pockets are formed for adhesive which is introduced there and after hardening binds the insert to the profiles.

[0004] From publication CA 2561334 A1 entitled "A joint frame for the frames of doors and windows" an L-shaped element is known for joining profiles placed at a 90° angle in relation to each other.

[0005] Additionally, from publication TWM 316305 U entitled "Joint angle block structure of window frame", an insert is known, which is embedded in profiles which are ended with a cant.

[0006] From publication US 2008/060314 A1 entitled "Corner joint for pultruded window frame" a corner element is known having legs located at an angle in relation to each other of which each is embedded in chambers of various profiles. Surfaces of legs are covered with adhesive layers, which enable durable connection of various profiles together by means of the corner element.

[0007] The purpose of the present invention is to create a joint of great strength for joining profiles from which windows, doors, shutters and facade structures are made.

[0008] The subject matter of the invention is a corner joint for connecting profiles containing a corner element embedded in chambers of profiles being connected and connecting elements by means of which the corner element is immobilised in relation to profiles being connected, whereas the corner element is of a shape of a joining block, which, with one end, is embedded in the chamber of the first profile and with the other end is embedded in a cut-out made in the internal wall of the second profile and adjoins the middle wall of the second profile with the front surface, while the middle wall of the second profile is pressed to the front surface of the joining block by means of the first joining element determining the location of the joining block in relation to the second profile, which is a screw, which goes through a through hole made in the middle wall, and which is screwed into a threaded opening made in the joining block from the front surface side, and the position of the joining block in relation to the first profile is determined by means of the second joining element, which is a screwable element going through a through hole of the internal wall of the first profile, and which is screwed into a threaded opening made in the joining block from the side of the surface adjoining the internal wall of the first profile.

[0009] Preferably, the joining block is embedded in the internal chamber of the first profile together with the first arm of the stiffening element, whose other arm located at an angle in relation to the first arm is located in the middle chamber of the second profile and is adjoining, from the middle chamber side, the middle wall of the second profile, which is enclosed from both sides by a joining block and the other arm of the stiffening element.

[0010] Preferably, the joining block has cylindrical pins protruding from the front surface, which are inserted into openings of the middle wall of the second profile and into openings of the second arm of the stiffening element.

[0011] Preferably, the stiffening element is in a shape of a bent flat bar with two arms, of which the first arm is placed horizontally, and the other arm is a vertical arm.

[0012] Preferably, the stiffening element is in the shape of the bent flat bar with two arms, of which the first arm is placed horizontally and has additional stiffening containing a vertical external part, a top horizontal part bent towards the other arm and a vertical internal part bent towards a horizontal part of the first arm.

[0013] Preferably, the first profile and the second profile are made of plastic. Preferably, the joining block is made of metal or plastic.

[0014] Preferably, the stiffening element is made of metal.

[0015] The object of the invention has been presented in the accompanying drawing in which:

Fig. 1 is a view of the corner, for example from a shutter, with a partially removed cap to show a corner joint;

Fig. 2 is an exploded axonometric view of elements of the corner joint for joining profiles;

Fig. 3 is an axonometric view of the horizontal profile with the joining block;

Fig. 4 is an axonometric view of the vertical profile end;

Fig. 5 is an axonometric view of the joining block;

Fig. 6 is an axonometric view of the first embodiment of the stiffening element; and

Fig. 7 is an axonometric view of the second embodiment of the stiffening element.

[0016] A set also referred to as a corner joint 1 for joining profiles shown in Fig. 1 and 2 comprises a corner element, which has a shape of a joining block 30, which in this embodiment, is partially embedded in the middle chamber of the first profile 10. In the event the first profile 10 does not have narrowing at the external side, the middle chamber is the space going as far as to the external wall of the first profile 10, which in Fig. 1 and 2 is located at the top. Together with a part of the joining block 30, in the middle chamber or the middle space of the first profile 10, a horizontal arm 43 of a stiffening element 40 may be embedded. A part of the joining block 30 that protrudes beyond the first profile's front surface, which may be the horizontal profile 10, is embedded in the cut-out 121 shown in Fig. 4, made in the internal wall 127 and goes crosswise through the first, internal chamber 21 of the second profile, which may be the vertical profile 20, and is adjoining the middle wall 27 of the vertical profile 20. The middle wall 27 divides the internal space of the vertical profile 20 into the internal chamber 21 and the middle chamber 22, and the external wall of the vertical profile 20 has an offset, thanks to which the internal chamber 23 is created. The horizontal profile 10 and the vertical profile 20 are profiles which are similar in shape to the known profiles of windows, doors and glazed external facades. Usually such profiles have a rectangular cross section, in which some walls may have offsets forming steps. Inside the profile there may be longitudinal walls, dividing the profile's internal space into chambers. Profiles may have protruding elements, which, with some walls, may create chambers or one-side open spaces, in which filling may be placed, such as glazing, transverse slats or other elements which fill the entire interior of the window frame or the shutter frame. In the event of the shutter shape other than rectangular, the shutter may have a form of other polygon, a triangle for example, and the number of frame elements may change, and its side elements may be get out of plumb at an angle dependent upon the shutter dimensions. The internal walls of profiles, in the meaning of the invention, are walls of profiles which are adjoining the inside of the frame made of profiles or a corner area adjoining the profiles, which will be hereinafter referred to as the inside or interior. The arm 44, which may be a vertical arm of the stiffening element 40, is placed in the middle chamber of the vertical profile 20 and, from the side of the middle chamber 22, is adjoining the middle wall 27 of the vertical profile 20 in the manner that the middle wall 27 of the vertical profile 20 is enclosed from both sides by the joining block 30 and the vertical arm 44 of the stiffening element 40. The vertical arm 44 is pressed to the middle wall 27 of the vertical profile 20 by means of a set screw 50 with a head 51, which is screwed in the threaded opening of the joining block 30 and goes through the through hole 25 of the middle wall 27. The vertical profile 20 is plugged by means of a cap 60 which covers the space including the joining block 30 and a bent stiffening element 40, for example in the form of a flat bar. It must be remembered that in the event when the mutual location of profiles being connected changes, for example after turning the set of profiles by an angle of 90°, the first profile may be a vertical profile, the other profile may be a horizontal profile. Similarly, the arm of the stiffening element 40, which in the presented solution is a vertical arm, may be, after changing the location of the profiles and the stiffening element, a horizontal arm, as well as the arm of the stiffening element 40, which in the presented solution is a horizontal arm, may be, after changing the location of the profiles and the stiffening element, a vertical arm.

[0017] In the embodiment presented in Fig. 1, 2, 3, 4 and 5 which show also component elements of the set 1 for connecting profiles, the horizontal profile 10 has a front surface 16, which is perpendicular to the longitudinal axis 17 of the horizontal profile 10, and the joining block 30 is embedded in the middle chamber 12, which is adjacent to the external chamber 11 and the internal chamber 13. In other encountered examples embodiments of profile, there is no external chamber, and the middle chamber comprises a space of the external chamber 11 and of the middle chamber 12. The length of the protruding part of the joining block 30 is selected in such a manner so that after the contact of the front surface 16 of the vertical profile 10 with the vertical profile 20, the front surface 33 of the joining block 30 is in touch with the middle wall 27 of the vertical profile 20 from the side of the internal chamber 21, which is a chamber open from one side, in order to place filling therein, for example slats, when the shutter frame is formed from profiles. From the side of the internal chamber 13, a screw 70 or a flat head bolt is screwed in the joining block 30, which goes through a through hole 14 made in the internal wall 115 of the horizontal profile 10, which in Fig. 3 is shown in a position in which the internal wall 115 is located at the top. In this internal wall an additional opening 15 may be made, which may be a venting or draining opening.

[0018] The vertical profile 20 has a recess 24, which includes the internal chamber 21 and the middle chamber 22, and the lower surface 29 of the vertical profile 20 lies above the plane of the top surface of the joining block 30 after pressing the horizontal profile 10 and the vertical profile 20 together. In turn, the top surface 28 of the vertical profile 20 is located at such a level that after pressing the horizontal profile 10 and the vertical profile 20 with the chamber 23 together, it is located below the upper edge of the horizontal profile 10, so that after installing cap 60 the surfaces of the horizontal profile 10 face the external surfaces of the cap 60.

[0019] In the middle wall 27 of the vertical profile 20 there is a through hole 25, through which a set screw 50 goes, and two through holes 26, in which cylindrical pins 32 of the joining block 30 are embedded after pressing profiles to each other and the vertical arm 44 to the middle wall 27 of the vertical profile 20. The length of the cylindrical pins 32 is selected in such a way that the length is greater than the total of thickness b of the middle wall 27 and thickness c of the stiffening element 40 which makes the cylindrical pins 32 protrude beyond the external surface of the vertical arm 44 of the stiffening element 40 after pressing it to the middle wall 27. Dimension a, in turn, being the distance of the front surface 33 of the joining block 30 from the vertical arm 44 of the stiffening element 40 is greater than thickness of the vertical middle wall 27 of the vertical profile 20, which makes it possible to insert the wall 27 between the front surface 33 of the joining block 30 and the vertical arm 44 of the stiffening element 40 while joining the profiles.

[0020] The joining block 30, presented in an axonometric view in Fig. 5 may be made of metal or plastic and may have a shape of a rectangular prism with rounded corners. The joining block 30 may have concavities or convexities on its surfaces adapted by shape to the shape of profiles or other elements of the joint. A threaded opening 31 and the cylindrical pins 32 are placed from the front surface 33 and are located in such a way and have such dimensions that the cylindrical pins may be inserted into two openings 26 in the middle wall 27 of the vertical profile 20 and into two openings 41 in the vertical arm 44 of the stiffening element 40, with a simultaneous possibility of screwing the screw 50 into the threaded opening 31, which goes through a top opening 25 in the middle wall 27 of the vertical profile 20 and through a top opening 42 in the vertical arm 44 of the stiffening element 40, shown in Fig. 2. A top surface 34 of the joining block 30 may be flat, but may also have a recess with a flat surface to which the vertical arm of the arm 43 of the stiffening element 40 is adjoining. The bottom surface 35 of the joining block 30 in the presented solution may be at least partially flat, which may facilitate inserting the joining block 30 into a cut-out of the vertical profile 20. Height h of the joining block 30 after being added to thickness c of the arm of the stiffening element 40 may not be greater than height of the middle chamber 12 of the horizontal profile 10 so that it is possible to insert the joining block 30 and the arm of the stiffening element 40 into the chamber of the horizontal profile 10.

[0021] Fig. 6 shows the stiffening element 40 in the shape of a bent flat bar with two arms, of which the first arm 43 is horizontal. The other arm 44, which in this solution is a vertical arm, has a top through hole 42 and two through holes 41, whose diameters are smaller than the diameter of the top through hole 42.

[0022] Fig. 7 shows another form or another embodiment of a stiffening element 140 which, likewise in the event of the stiffening element 40 shown in Fig. 6 has a shape of a bent flat bar with two arms, of which a first arm 143 is horizontal, and which additionally has strengthening. A part 145 of the horizontal arm 143 passes into a vertical external part 146, which is the first element of strengthening, and then into a top horizontal part 147 and a vertical internal part 148. The vertical internal part 146, the top horizontal part 147 and the vertical internal part 148 form additional strengthening of the stiffening element 140. The other arm 144, which in this solution is also a vertical arm, has a top through hole 142 and two through holes 141, whose diameters are smaller than the diameter of the top through hole 142. The stiffening element 140 with strengthening is used to join profiles, particularly when the chamber of the horizontal profile is higher than the block's height.

Claims

1. A corner joint for joining profiles containing a corner element embedded in chambers of profiles (10, 20) being connected and connecting elements by means of which the corner element (30) is immobilised in relation to profiles (10, 20) being connected, characterised in that the corner element is of shape of a joining block (30), which with one end is embedded in a chamber (12) of the first profile (10) and with the other end is embedded in a cut-out (121) made in an internal wall (127) of the second profile (20) and is by a front surface (33) in touch with a middle wall (27) of the second profile (20), while the middle wall (27) of the second profile (20) is pressed to the front surface (33) of the joining block (30) by means of the first joining element determining the position of the joining block (30) in relation to the second profile (20), which is a screw (50), which goes through a through hole (25) made in the middle wall (27), and which is screwed into a threaded opening (31) made in the joining block (30) in the front surface side (33), and the position of the joining block (30) in relation to the first profile (10) is determined by means of the second joining element which is a screwable element (70) going through a through hole (14) of the internal wall (115) of the first profile (10), and which is screwed into a threaded opening made in the joining block (30) in a side of the surface adjoining the internal wall of the first profile (10).

2. The corner joint according to claim 1, characterised in that the joining block (30) is embedded in the internal chamber (12) of the first profile (10) together with a first arm (43) of a stiffening element (40), whose other arm (44) located at an angle in relation to the first arm (43) is located in the middle chamber of the second profile (20) and is adjoining, at a side of the middle chamber (22), the middle wall (27) of the second profile (20), which is enclosed from both sides by the joining block (30) and the other arm (44) of the stiffening element (40).

3. The corner joint according to claim 2, characterised in that the joining block (30) has cylindrical pins (32) protruding from the front surface (33), which are inserted into openings (26) of the middle wall (27) of the second profile (20) and openings (41) of the second arm (44) of the stiffening element (40).

4. The corner joint according to claim 2 or 3, characterised in that the stiffening element (40) has a shape of a bent flat bar with two arms, of which the first arm (43) is placed horizontally, and the other arm (44) is a vertical arm.

5. The corner joint according to claim 2 or 3, characterised in that the stiffening element (140) has a shape of a bent flat bar with two arms (143, 144), of which the first arm (143) is placed horizontally and has additional strengthening containing a vertical external part (146), a top horizontal part (147) bent towards the other arm (144) and a vertical internal part (148) bent towards the horizontal part of the first arm (143).

6. The corner joint according to claim 1 or 2 or 3 or 4 or 5, characterised in that the first profile (10) and the second profile (20) are made of plastic.

7. The corner joint according to claim 1 or 2 or 3 or 4 or 5 or 6, characterised in that the joining block (30) is made of metal or plastic.

8. The corner joint according to claim 1 or 2 or 3 or 4 or 5 or 6 or 7, characterised in that the stiffening element (40, 140) is made of metal.

Drawing