FIXING INSERT FOR FLUSH

Description

[0001] The present invention relates to a frame and a fastening system

[0002] DE 19 42 699 U, DE 70 25 049 U and FR 2 921 093 A1 refer to a fastening insert for fastening a frame to a substructure profile.

[0003] To securely and horizontally install window and door frames, it is common practice to connect them using a so-called substructure profile. This substructure profile is thermally separated from the building's foundation, thus preventing thermal bridges between the interior and the window or door frame. The substructure profile(s) are often attached to the masonry or a foundation slab using mounting brackets. Once the substructure profile is anchored to the building structure or foundation slab, the window frame is firmly connected to it.

[0004] To ensure a structurally sound connection between the frame and the substructure profile, it is advantageous to use metal fasteners, particularly steel ones, to join the two components. However, such a stable solution often has the disadvantage of creating thermal bridges between the frame and the substructure profile. Plastic fasteners, which would avoid this problem, often fail to meet the structural requirements for the connection.

[0005] Based on this problem, the present invention aims to provide a fastening solution that serves to anchor a frame to a substructure profile and thereby meets the static requirements without impairing the thermal insulation properties of the frame.

[0006] According to the invention, the present problem is solved by the subject matter of independent claim 1. Advantageous embodiments of the invention are specified in dependent claims 2 to 14. Accordingly, the invention relates in particular to a fastening insert for attaching a frame to a substructure profile, wherein the fastening insert has a sleeve for receiving a fastening element. The sleeve is designed to be inserted into at least one insulating web of a frame. The fastening insert has a transverse tab for detachably connecting the fastening insert to a frame profile of the frame. The transverse tab extends in a direction that is substantially perpendicular to a longitudinal direction of the sleeve. The transverse tab has a length that is longer than the length of the at least one insulating web in which the sleeve is inserted when in use.In other words, the transverse tab has a length that spans the insulating bars of the frame, that is, which extends beyond the ends of the insulating bars.

[0007] By inserting the sleeve of the fixing insert into at least one insulating spacer, thermal bridges between the fixing insert and the frame halves are effectively prevented. This ensures that, despite the use of the fixing insert, the U-value of the window or door incorporating the fixing insert is not significantly worsened.

[0008] The length of the transverse tab mentioned above allows it to be used to connect the mounting insert to both the inner and outer shells of the frame simultaneously. This connection can be achieved, for example, by screwing the mounting insert to the frame halves. Alternatively, the transverse tab can be glued to the frame or, in the case of aluminum windows and doors, welded. Accordingly, the transverse tab enables a stable connection between the mounting insert and the frame profile, which is essential for ensuring that the frame is securely and adequately attached to the masonry or substructure.

[0009] In another embodiment, the fastening insert is made of metal, in particular steel. Manufacturing the fastening insert from metal further improves the hold of the frame to the masonry or the substructure profile via the fastening insert.

[0010] In another embodiment, the sleeve and the cross tab are permanently connected. The sleeve can, for example, be welded or glued to the cross tab. Alternatively, however, it is also conceivable that the sleeve and the cross tab are detachably connected, for example, via a screw connection.

[0011] In another embodiment, the sleeve and the cross tab are formed in one piece. For example, the fastening insert could be made of cast steel. A one-piece design also advantageously increases the stability properties of the fastening insert.

[0012] In a further embodiment, the transverse tab has a first opening at one end and a second opening at the other end. The transverse tab is designed such that, when the mounting insert is used, the first opening rests against an outer shell of the frame. When the mounting insert is used, the second opening rests against an inner shell of the frame.

[0013] The openings mentioned above can be used to detachably attach the crossbar to the frame, specifically to the inner and outer shells of the frame. For this purpose, the crossbar can be quickly and easily connected to the frame halves, for example, by screws that extend through the openings into the frame halves.

[0014] In another embodiment, the crossbar is essentially rectangular, with a first rounded corner and a second rounded corner, the first and second rounded corners being diametrically opposed. In this embodiment, at least two corners of the essentially rectangular crossbar are rounded. This has the advantage that the crossbar can be easily inserted into undercuts in the frame when mounted. Furthermore, the combination of rounded and right-angled corners of the crossbar simplifies its adjustment relative to the frame, as will be explained in detail below.

[0015] According to the present invention, a frame is provided with an outer shell and an inner shell. The outer shell and the inner shell of the frame are connected to each other via at least one insulating spacer. The frame has one of the fastening inserts described above, wherein the sleeve of the fastening insert is inserted into the at least one insulating spacer.

[0016] As already indicated above, a frame with the fastening insert according to the invention has the advantage that it can be attached quickly and easily to the masonry or the substructure profile without having to accept unintentional thermal bridges.

[0017] In a further embodiment, the at least one insulating web has an opening for receiving the sleeve of the fastening insert. The opening extends essentially perpendicular to a longitudinal direction of the insulating web through the insulating web. The sleeve of the fastening insert can be quickly and easily inserted into the insulating web through this opening. The openings can be provided in the insulating webs during the production of the frame.

[0018] Alternatively, these can be inserted into the insulating strips during installation. The mounting insert can therefore also be retrofitted to existing windows and doors. For this, the installer simply needs to drill a hole in the insulating strips to insert the sleeve of the mounting insert. As will be explained in more detail later, it is important to note that the sleeve should be matched to the depth of the insulating strips.

[0019] In a further embodiment, the outer and inner shells of the frame each have an outer surface. This outer surface is a side of the frame spaced away from the sash frame. In this embodiment, the transverse tab rests with one end against the outer surface of the outer shell and with its opposite end against the outer surface of the inner shell. The transverse tab is thus attached to the cold side of the frame, which is further advantageous for the thermal insulation properties of the frame with the mounting insert.

[0020] In another embodiment, the ends of the crossbar are each detachably connected to the inner and outer shells via a fastening element. In other words, a first end of the crossbar is connected to the outer shell of the frame, while the second, opposite end of the crossbar is connected to the inner shell of the frame. The fastening elements can be, for example, screws or threaded bolts.

[0021] According to a further embodiment, the sleeve has a length corresponding to the thickness of the insulating web. In other words, the sleeve preferably extends only between an inner and an outer side of the at least one insulating web, thus being compactly housed within the frame profile of the window frame. The sleeve preferably does not protrude from the insulating web.

[0022] In some embodiments, the frame has a multitude of insulating bars, which are arranged, for example, parallel to each other between the inner and outer shells. The insulating bars are usually separated from each other by gaps. In such cases, the sleeve of the mounting insert can have a length dimensioned such that it extends vertically through all the insulating bars and their gaps. In other words, the length of the sleeve is dimensioned such that one end of the sleeve rests against an inner surface of an inner insulating bar, while the opposite end rests against the outer surface of an outer insulating bar. The length of the sleeve is accordingly adapted to the depth of the insulating bars, as will be described in detail below.

[0023] According to a further aspect of the present invention, a fastening system is specified which comprises a substructure profile and a frame as described above. A fastening element for releasably fastening the frame to the substructure profile extends through the sleeve of the fastening insert and into the substructure profile.

[0024] In this fastening system according to the invention, the fastening element is guided, in particular, through the sleeve, so that it can be repeatedly screwed vertically into the substructure profile. Furthermore, the fastening insert ensures that the fastening element has a strong hold against the frame, even though it extends over the sleeve through the less stable insulating webs. The stability of the fastening element is provided, in particular, by the transverse tab, which securely anchors the fastening insert to the profile frame of the frame.

[0025] In another embodiment, the substructure profile has a steel profile into which the fastening element engages. It should be noted that substructure profiles serve to thermally separate the interior of the house from the exterior, such as the ground, and are therefore typically made of heat-insulating material, such as plastic. In this embodiment, a steel profile can be inserted into the plastic substructure profile to reinforce it. The fastening element can thus be screwed into the steel profile through the plastic profile of the substructure profile, thereby increasing the stability of the connection between the frame and the substructure profile.

[0026] Advantageous embodiments of the connector according to the invention are described in more detail below with reference to the accompanying drawings. These show: FIG. 1A and 1B perspective views of a fastening insert according to an embodiment of the invention; FIG. 2 a schematic cross-section through an embodiment of the frame according to the invention; FIG. 3 a perspective view from below of the FIG. 2 The illustrated embodiment of the frame; FIG. 4 a cross-section through an embodiment of the fastening system according to the invention; FIG. 5 a perspective view of the fastening system in FIG. 4 .

[0027] FIG. 1A and 1B Figure 1 shows perspective views of a fastening insert according to an embodiment of the present invention. The fastening insert 10 has a sleeve 12. The sleeve 12 serves as a guide for a fastening element which will be described in more detail below. In the embodiments in FIG. 1A and 1BThe sleeve is cylindrical. However, it is also possible to design the sleeve with one or more flat side walls, e.g., as a prism. A through-hole (not shown) extends longitudinally along the sleeve 12 to receive the fastening element 33. In some embodiments, the through-hole may have an internal thread for improved guidance of the fastening element.

[0028] The fastening insert 10 has a transverse tab 14. The transverse tab 14 extends in a direction perpendicular to the longitudinal direction of the sleeve 12. In other words, the longitudinal direction of the transverse tab 14 is perpendicular to the longitudinal direction of the sleeve 12. "Substantially perpendicular" here means that the longitudinal direction of the transverse tab is oriented at an angle between 85° and 95° with respect to the longitudinal direction of the sleeve 12.

[0029] The transverse tab 14 has an opening for the fastener (not shown), which is aligned with the through-hole of the sleeve 12. In other words, the through-hole of the sleeve and the opening of the transverse tab 14 are aligned such that the fastener 33 can extend through the through-hole of the sleeve 12 and through the opening of the transverse tab 14.

[0030] The sleeve 14 is firmly connected to the transverse tab 14. In the embodiment according to the Figures 1A and 1B The sleeve 12 is connected to the transverse tab 14 via a weld 16.

[0031] The transverse tab 14 has a first end 18 and a second end 20 opposite the first end 18. The transverse tab 14 has a first opening 22 at the first end 18. The transverse tab 14 has a second opening 24 at the second end 20. Regarding the openings in the Figures 1A and 1BThese are through holes extending transversely to the longitudinal direction of the transverse tab 14 through the transverse tab 14. The openings 22, 24 can be used to detachably attach the transverse tab 14, and thus the fastening insert 10, to a frame (for example, using screws), as shown in FIG. 2 shown.

[0032] The transverse tab 14 is essentially rectangular, with two corners 26, 30 being rounded. The in FIG. 1B The first and second corners 26, 30 of the transverse tab 14, as shown, are arranged diametrically opposite each other. The third and fourth corners 28, 32 of the transverse tab 14 are formed at right angles. The design of the transverse tab 14 with two rounded and two right-angled corners facilitates the attachment of the transverse tab 14 to the frame, as shown with reference to FIG. 3 will be described in more detail.

[0033] As already indicated above, the fastening insert 10 serves to accommodate a fastening element 33. The fastening element 33, which is located in the Figures 1A and 1B As shown, the screw has a screw head 34 and a threaded section 36. The screw head 34 rests against a head plate 38, which is designed as a rectangular washer, at a first end of the sleeve 12. The threaded section 36 extends through the through-hole and the corresponding opening of the transverse tab 14 and projects beyond the transverse tab 14 from the fastening element 10, as shown in the Figures 1A and 1B is shown.

[0034] FIG. 2Figure 1 shows a schematic cross-section through an embodiment of a frame 100 according to the present invention. The frame 100 comprises a frame profile 102 with an outer shell 104 and an inner shell 106. The outer shell 104 of the frame profile 102 is connected to the inner shell 106 via two insulating webs 116, 118. The inner and outer shells 104, 106 can, for example, be aluminum profiles, while the insulating webs 116, 118 are preferably plastic profiles.

[0035] The outer shell 104 of the FIG. 2The inner shell 106 has an inner surface 108 and an outer surface 110. The inner shell 106 has an inner surface 112 and an outer surface 114. When the window or door is installed, the inner surfaces 108 and 112 face the sash frame. When installed, the outer surfaces 110 and 114 face the masonry or the substructure profiles.

[0036] The two insulating webs 116, 118 are spaced apart from each other by a gap 117. In the embodiment according to FIG. 2The first insulating spacer 116 is an internal insulating spacer, and the second insulating spacer 118 is an external insulating spacer. The first, internal insulating spacer 116 is the one closest to the sash frame (not shown) when installed. The second, external insulating spacer 118 is the one furthest from the sash frame when installed. Additional insulating spacers 116 and 118 may, of course, be present between the first and second insulating spacers 116 and 118. However, it is also possible for only a single insulating spacer to be provided between the outer shell 104 and the inner shell 106.

[0037] The in FIG. 2 The frame shown, 100, has the one in the Figures 1A and 1BThe fastening insert 10 shown extends through the two insulating webs 116, 118. Specifically, the sleeve 12 of the fastening insert is dimensioned such that it extends through the entire depth of the insulating webs 116, 118. In other words, a first end of the sleeve 12 lies flush against an inner surface of the first insulating web 116, while a second end of the sleeve, which is connected to the transverse tab 14, lies flush against an outer surface of the second insulating web 118. It follows that the length of the sleeve should correspond to the thickness of all insulating webs 116, 118 and all gaps 117. In some embodiments, the sleeve can be adjustable in length (not shown) so that the fastening insert can be adapted to frame profiles of different depths.

[0038] The transverse tab 14 of the fastening insert rests against the outside of the frame when installed. Specifically, the transverse tab 14 rests against the outer surfaces 110, 114 of the outer shell 104 and the inner shell 106, as well as against the outside of the second insulating web 118. The length of the transverse tab 14 is designed such that the openings 22, 24 of the transverse tab 14 rest against the outer surfaces 110, 114 of the inner shell 104 and the outer shell 106, respectively. Fastening elements 120, 122 can thus be guided through the openings into the half-shells of the frame 100. This allows the transverse tab 14, and therefore the fastening insert 10, to be detachably attached to the frame profile 102.

[0039] An enlarged view of the outside of the frame 100 according to the FIG. 2 is in the FIG. 3As mentioned above, the transverse tab 14 is arranged on the outer side 130 of the frame profile 102. The transverse tab 14 extends from the outer side 110 of the outer shell 104 to the outer side 114 of the inner shell 106. A first fastening element 120, in particular a first fastening screw, is inserted into the outer shell 104 through the first opening (not shown) of the transverse tab 14. A second fastening element 122, in particular a second fastening screw, is inserted into the inner shell 106 through the second opening (not shown) of the transverse tab 14.

[0040] To ensure that the transverse tab 14 lies flush against the outside of the frame profile 102, a recess 132 is provided on the outside of the frame. The recess 132 is designed in particular such that the transverse tab 14 can be positioned in undercuts 134, 136 of the half-shells. The recesses 134 and 136 in the frame serve this purpose. FIG. 1B described, rounded and right-angled corners 26, 28, 30, 32 of the transverse tab 14. In particular, when inserting the sleeve into the (not shown) openings of the insulating webs, the transverse tab is first pressed against the side indicated by the arrow. FIG. 3 The indicated clockwise direction is rotated so that the rounded corners can be pushed past the undercuts 134, 136. As soon as the transverse tab 14 rests against the outer side 130 of the frame profile 102, the transverse tab can be rotated again clockwise, i.e., against the direction of the arrow. FIG. 3 , rotated so that the right-angled corners of the transverse flap 14 come to lie behind the undercuts 134, 136, as shown schematically in the FIG. 2 and 3This insertion into the undercuts also has the advantage that the right-angled corners ensure a perpendicular alignment of the transverse tab 14 with respect to the frame profile of the blind frame, because the right-angled corners prevent further clockwise rotation of the transverse tab 14 beyond the FIG. 3 shown vertical position.

[0041] One embodiment of a fastening system 200 according to the present invention is in FIG. 4 shown. FIG. 4 shows the 100 mm frame as it is used in FIG. 2 as already described. The frame 100 is in the embodiment according to FIG. 4The frame is attached with two substructure profiles 202, 204. It should be noted that the invention is not limited to the number of substructure profiles. Rather, the number of substructure profiles generally depends on the desired height. Accordingly, the frame can also be connected with just one substructure profile or with more than two.

[0042] The two substructure profiles 202, 204 are attached to a mounting bracket 216, which in turn can be connected to, for example, a base plate. A first substructure profile 202 has a plastic profile with a steel profile insert 206. A second substructure profile 204 has a plastic profile with a second steel profile insert 208. The steel profiles 206, 208 serve to reinforce the substructure profiles. The first steel profile 206 is detachably connected to the plastic profile of the first substructure profile 202 via fasteners 210. The second steel profile 208 is connected to the plastic profile of the second substructure profile 204 via detachable fasteners 214. The two substructure profiles, in particular the two steel profiles 206, 208, are connected to each other via a common fastener 212.

[0043] FIG. 4Figure 1 further shows that the fastening element 33 with its threaded part 36 extends into the second substructure profile 204. In particular, the threaded part 36 of the fastening element 33 is shown in the embodiment according to Figure 1. FIG. 4 screwed into the steel profile 208 of the second substructure profile 204. In contrast, the head piece 34 of the fastener 33 is connected to the inner insulating web 116 via the head plate 38, as can be seen in particular from FIG. 5 as is evident.

[0044] FIG. 5 shows a perspective top view of the fastening system 200. FIG. 4 As shown, the head plate 38 is located in a milled recess of the first insulating web 116 and thus lies flush against the inside of the first insulating web 116. The screw head 34 of the fastener 33 rests against the outside of the head plate 38, thereby transferring the forces via the head plate 38 into the insulating web 116.

[0045] The invention is not limited to the exemplary embodiments shown in the figures, but results from a combination of all the features disclosed herein and is defined by the attached claims. Reference symbol list

[0046] 10 Fastening insert 12 Sleeve 14 Cross tab 16 Weld 18 First end 20 Second end 22, 24 Opening 26, 28, 30, 32 Corners 33 Fastening element 34 Screw head 36 Threaded part 38 Head plate 100 Cover frame 102 Frame profile 104 Outer shell 106 Inner shell 108, 112 Inner surface 110, 114 Outer surface 116, 118 Insulating strip 117 Gap 120, 122 Fastening element 130 Outer side 132 Recess 134, 136 Undercut 200 Fastening system 202, 204 Substructure profile 206, 208 Steel profile 210 Fastening element 212, 214 Fasteners

Claims

1. A blind frame (100) comprising an outer shell and an inner shell, which are connected to each other via at least one insulating web (116, 118), wherein the blind frame (100) further comprises a fixing insert (10) for fixing the blind frame (100) to a substructure profile (202, 204), the fixing insert (10) comprising: - a sleeve (12) for receiving a fastening element (33), wherein the sleeve (12) of the fixing insert (10) is inserted into the at least one insulating web (116, 118); and - a cross tab (14) for fastening the fixing insert (10) to the blind frame, wherein the cross tab (14) extends in a direction that is substantially perpendicular to a longitudinal direction of the sleeve (12) and has a length that is longer than a length of the at least one insulating web (116, 118) into which the sleeve (12) is inserted.

2. The blind frame (100) according to claim 1, wherein the fixing insert (10) is made of metal, in particular of steel.

3. The blind frame (100) according to claim 1 or 2, wherein the sleeve (12) and the cross tab (14) are firmly connected to each other.

4. The blind frame (100) according to claim 3, wherein the sleeve (12) is welded to the cross tab (14).

5. The blind frame (100) according to claim 3, wherein the sleeve (12) and the cross tab (14) are one piece.

6. The blind frame (100) according to any one of claims 1 to 5, wherein the cross tab (14) has a first opening (22) at a first end and a second opening (24) at a second end, and wherein the cross tab (14) is designed such that the first opening abuts on the outer shell (104) of the blind frame and the second opening abuts on the inner shell (106) of the blind frame.

7. The blind frame (100) according to any one of claims 1 to 6, wherein the cross tab (14) is essentially rectangular, with a first rounded corner (26) and a second rounded corner (30), wherein the first and second rounded corners are diametrically opposite each other.

8. The blind frame (100) according to any one of claims 1 to 7, wherein the at least one insulating web (116, 118) has an opening for receiving the sleeve (12) of the fixing insert (10), which extends substantially perpendicular to a longitudinal direction of the insulating web (116, 118) through the insulating web (116, 118).

9. The blind frame (100) according to claim 8, wherein the outer shell and the inner shell each have an outer side, and wherein the cross tab (14) abuts with a first end on the outer side of the outer shell and with an opposite second end on the outer side of the inner shell.

10. The blind frame (100) according to claim 9, wherein the two ends of the cross tab (14) are each detachably connected to the inner shell and the outer shell via a fastening element (120, 122).

11. The blind frame (100) according to any one of claims 8 to 10, wherein the sleeve (12) has a length which corresponds at least to the thickness of the insulating web (116, 118).

12. The blind frame (100) according to claim 11, wherein the blind frame (100) comprises a plurality of insulating webs (116, 118) which are separated from one another by gaps (117), and wherein the sleeve (12) has a length which is designed such that the sleeve (12) extends vertically through all insulating webs (116, 118) and their gaps.

13. A fastening system (200) comprising: - a substructure profile (202, 204); - a blind frame (100) according to one of claims 1 to 12; - a fastening element (33) for releasably fastening the frame (100) to the substructure profile (202, 204), wherein the fastening element extends through the sleeve (12) of the fixing insert (10) and into the substructure profile.

14. The fastening system according to claim 13, wherein the substructure profile (202, 204) comprises a steel profile (206, 208) and the fastening element (33) engages the steel profile.