EP1577482A1 - Corner joint for window frames or the like - Google Patents

Abstract

Corner connection for a window frame, etc. having frame parts (10, 12) joined at the corner comprises first holes (16, 18) in the frame parts that originate from the end faces of the joining surfaces (14), and at least one connecting element (20) made of a harder material than the frame parts and introduced into the first holes. Second holes (26, 28) in the frame parts run perpendicularly and at least up to the first holes. Holes (30, 32) in the connecting element are in alignment with the second holes as far as an offset specified before assembly of the window frame. Dowel pins are driven into the second holes and the holes in the connecting element. Third holes (34, 36) in the frame parts lead up to the first holes so that an adhesive can be pressed through one of the third holes into the first holes and out into another of the third holes. An independent claim is also included for the production of a window frame, etc.

Description

The invention relates to a corner joint for a window frame or the like made of wood, a wooden material or plastic.

The state of the art knows different corner joints in wooden frames of windows, for example, so-called slot and tenon joints, counter-milling with dowel connection and miter cuts with dowel connection. These However, known corner joints have different disadvantages.

The slot and tenon connection requires that the frame profiles with elaborate Counter-milling be provided. The assembled frame parts must be pressed. Both steps mentioned require relatively high effort in terms of machines and their operation. In addition, this requires Technique also usually a final surface treatment of the woods.

The corner joints with counter-milling and dowel connection also require elaborate milling and the frame must be pressed. Again, it is a subsequent surface treatment usually required.

The simple connection with miter cut and dowel connection is relative not very costly, but here too the frames have to be pressed.

Also known in the art Eckverbindung with dowels and so-called Swallows often provide unsatisfactory results in terms of stability. Also, the workload and the machine cost are significant.

The invention is based on the object, a corner joint for window frames or the like, such as door frames, frames, or larger Picture frame, provide that can be produced with relatively little effort and nevertheless allows tailor-made and long-term stable results.

In particular, the corner joint according to the invention should be suitable for relative slim frame parts. Furthermore, the corner joint according to the invention is intended in particular be suitable as so-called "system commodity", i. one manufacturer does not supply one prefabricated windows on the construction site or in the warehouse, rather, the manufacturer delivers Components ("systemware") cut on site to those dimensions which are required for the given construction site. So, for example supplied as "systemware" elongated rods, the desired profile of the have to be produced window, but are much longer than the ultimate needed frame parts for the windows. On site, for example in a carpentry, can then cut the desired frame parts and put together become. The same applies to other window components, such as seals etc. The present invention is particularly suitable for such "systemware".

• erste Bohrungen in den Rahmenteilen, die von den Stirnflächen der Rahmenteile ausgehen,
• zumindest ein Verbindungselement aus einem Material, das härter ist als das Material der Rahmenteile und das in die ersten Bohrungen eingeführt ist,
• zweite Bohrungen in den Rahmenteilen, die senkrecht und zumindest bis zu den ersten Bohrungen verlaufen,
• Bohrungen in dem Verbindungselement, die bis auf einen vor dem Zusammenbau des Fensterrahmens gegebenen Versatz mit den zweiten Bohrungen fluchten, und
• Spannstifte, die in die zweiten Bohrungen und die Bohrungen in dem Verbindungselement eingetrieben sind und dabei den Versatz zumindest teilweise aufgehoben haben.

The corner joint according to the invention for window frames or the like made of wood, a wood material or plastic provides frame parts, which are cut in the above sense on-site to length, wherein the corner joint is characterized by

• first holes in the frame parts, which start from the end faces of the frame parts,
• at least one connecting element of a material that is harder than the material of the frame parts and that is inserted into the first bores,
• second bores in the frame parts, which run perpendicularly and at least up to the first bores,
• Holes in the connecting element, which are aligned with the second holes except for an offset before the assembly of the window frame offset, and
• Dowel pins which are driven into the second holes and the holes in the connecting element and thereby at least partially canceled the offset.

This corner joint according to the invention does not require expensive machines and aids, in particular no milling machine, no frame press and no elaborate Connecting the frames with screw clamps. The processing is fast and does not necessarily require a gluing. The corner joint is characterized a high accuracy of fit of the components and a high long-term stability out. Perfect fit here means that the assembled components are structurally geometrical exactly in the desired position to each other, i. e. at the connection points There are no unwanted protrusions and edges and also the optical and haptic impression are high quality. The ingress of moisture is largely prevented.

According to a preferred embodiment of the invention, said connecting element two legs at right angles to each other.

According to another embodiment of the invention, the connecting element be an elongated bar without bending.

In both aforementioned embodiments, the cross section of the connecting element assume different shapes perpendicular to its longitudinal axis, For example, a relatively flat rectangular shape, or the shape of a circle or also, for example, the shape of a square with rounded or bevelled edges.

A particularly preferred embodiment of the invention provides third holes in the frame parts that lead to the first holes, so that an adhesive through one of the third holes in the first holes and from there into another the third holes is pressed. It turned out that with adhesives one very intimate connection between the connecting part and the wood or wood material is achieved, so that of the connecting element on the wood or the wood material applied force is distributed over a relatively large area, and the Connecting element not or only insignificantly pushes into the wood, and indeed then, when the resulting forces in the assembly of the window frame at Compensation of the offset arise. In known metal frames are in there anyway existing cavities corner joints braced, the metal being the resulting Absorbs forces without further ado. For wood and wood materials or too Plastics was not easy to assume that, despite the inhomogeneities in the wood material or also the anisotropy in the material, a reliable and stable connection with the quality features described above arises. there is the pressing in of glue for the complete filling of all cavities and all sides Embedding of the connecting element for a uniform force distribution and also very powerful in the material, but not necessary in every case.

A simple assembly of the window frame and also a particularly favorable Distribution of the adhesive for the purpose of a uniform distribution of force in the wood is also promoted by the fact that the connecting element according to another preferred Embodiment of the invention has smaller dimensions than the holes, in which it is inserted. In this way, the adhesive around the connecting element and anchor it on all sides firmly in the wood material.

If the connecting element for the corner joint angle-shaped, then the said Inventive offset both a component perpendicular to the direction the bore in which the connecting element is inserted, as well as a component parallel to the direction of this hole. The "direction of the hole" is the direction its longitudinal axis.

According to another preferred embodiment of the invention, the dowel pins, which are driven into the holes in the wood and in the connecting element, in Diameter the same size as the mentioned holes.

The connecting element is generally made of a material that is harder than the wood, the wood material or the plastic of the window frame parts, so for example a metal, such as aluminum, steel or stainless steel. But they are also high-strength Plastics conceivable as a material for the connecting element.

According to a further preferred embodiment, dowels and / or flat pieces as anti-rotation and / or positioning aid in the end faces of the miter cut inserted.

The corner joint according to the invention is particularly suitable for mitred cut frame parts. The above-mentioned advantages will also be partially realized in a corner joint, a blunt bump or a Has counter profiling.

• Bereitstellen von Stangen, deren Profil dem der Rahmenteile des herzustellenden Fensterrahmens entspricht und deren Länge ein mehrfaches größer ist als die Länge eines Rahmenteiles,
• Schneiden der Stangen vor Ort in Rahmenteile,
• Bohren von ersten Bohrungen in die Stirnflächen der Rahmenteile,
• Bohren von zweiten Bohrungen in die Rahmenteile senkrecht und zumindest bis zu den ersten Bohrungen,
• Einsetzen von zumindest einem Verbindungselement aus einem Material, das härter ist als das Material der Rahmenteile, in die ersten Bohrungen, wobei das Verbindungselement Bohrungen aufweist, die nach dem Einsetzen des Verbindungselementes in die ersten Bohrungen einen Versatz in Bezug auf die zweiten Bohrungen aufweisen, und
• Eintreiben von Spannstiften in die zweiten Bohrungen und in die Bohrungen in dem Verbindungselement, um den Versatz zumindest im wesentlichen aufzuheben.

The invention also teaches a method of manufacturing a window frame or the like made of wood, a wood material or plastic, comprising the following steps:

• Providing rods whose profile corresponds to that of the frame parts of the window frame to be produced and whose length is several times greater than the length of a frame part,
• Cutting the bars on site in frame parts,
• Drilling first holes in the end faces of the frame parts,
• Drilling second holes in the frame parts vertically and at least until the first holes,
• Insertion of at least one connecting element of a material which is harder than the material of the frame parts, in the first bores, wherein the connecting element has bores which have an offset with respect to the second bores after insertion of the connecting element in the first bores, and
• Driving dowel pins into the second holes and into the holes in the connector to at least substantially cancel the offset.

Figur 1

eine Draufsicht auf eine Fenster-Eckverbindung;

Figur 2

einen Schnitt durch ein Rahmenteil und ein Verbindungselement;

Figur 3

eine Draufsicht auf eine Stirnfläche eines Rahmenteiles am Gehrungsschnitt mit Bohrungen für das Verbindungselement und Dübel;

Figur 4

eine Stirnflächenansicht entsprechend Figur 3 mit einem gefrästen Schlitz anstelle der Dübel-Bohrungen;

Figur 5

eine Draufsicht auf ein weiteres Ausführungsbeispiel einer Eckverbindung;

Figur 6

ein Verbindungselement;

Figur 7

unterschiedliche Querschnitte eines Verbindungselements; und

Figur 8

eine Variante einer Fenster-Eckverbindung mit stumpfem Stoß oder einer Konterprofilierung.

Embodiments of the invention will be described in more detail with reference to the drawings. It shows schematically:

FIG. 1

a plan view of a window corner joint;

FIG. 2

a section through a frame part and a connecting element;

FIG. 3

a plan view of an end face of a frame part at the miter cut with holes for the connecting element and dowels;

FIG. 4

an end view corresponding to Figure 3 with a milled slot instead of the dowel holes;

FIG. 5

a plan view of another embodiment of a corner joint;

FIG. 6

a connecting element;

FIG. 7

different cross sections of a connecting element; and

FIG. 8

a variant of a window corner joint with blunt joint or a counter profiling.

Figure 1 shows a corner of a window frame. The remaining parts of the window frame are omitted for simplicity of illustration. Two frame parts 10, 12 off Wood are joined together on a miter cut 14. This corner joint will described in more detail below.

For the corner joint a first bore 16 is guided in the frame part 10 (with dashed line shown). Analog is in the other frame part 12 another first bore 18 out.

A connecting element 20, for example made of metal, is inserted into the holes. For example, before assembling the window frame, the connecting element 20 are introduced with its legs 22 in the first bore 16 and then then the leg 24 of the connecting element in the further first bore 18 in the other frame part 12, wherein initially roughly shown in Figure 1 Location is reached. Figure 1 also shows at the ends of the frame parts 10 and 12, respectively the cross section through the frame parts, wherein the cross sections "unfolded are ", that is, the actually perpendicular to the plane of the drawing guided cuts are Turned 90 ° so that they can be displayed in Figure 1.

In the frame parts 10 and 12 respectively second holes 26 and 28 are provided, which are attached in Figure 1 perpendicular to the drawing plane and through the holes 16 or 18 go through and on the opposite side from the Bore emerge, but not go to the outer surface of the frame parts (see. FIG. 4). The second holes 26, 28 serve to receive dowel pins (not shown), which are driven into the bores 26, 28. Accordingly, in the connecting element 20 holes (holes) 30, 32 formed, according to Figure 1 only approximately aligned with the said holes 26, 28 in the wood. The diameters the bores 26, 28, 30, 32 are equal and correspond to the diameters of (not shown) dowel pins. The dowel pins are made of metal, for example.

According to Figure 1, the holes 26 and 30 as well as the holes 28 and 32 an offset to each other. FIG. 1 shows the condition of the corner joint during of the assembly, but before the final state, which reaches during assembly becomes. The offset shown in Figure 1 between said holes is so given given the dimensions of the components then, if the Frame parts on the miter cut 14 full but without special tension to each other lie. In this state according to FIG. 1, the connecting element 20 also exerts no strong force on the inner walls of the holes 16, 18 from. Described below Dowels, angle dowels or a so-called shape spring, can in This condition further stabilize the corner joint and in particular a rotation effect.

Are then the dowel pins in the holes 26, 30 and 28, 32 driven, then meets the pointed end (not shown) of the dowel pin on the illustrated in Figure 1 Arrangement of the two holes with the offset shown. The offset "E" describes the distance of the center axes of the two holes in the direction perpendicular to the associated first bore 16 or 18. The offset "F" describes the Distance between the center axes of the holes in the direction of the associated first bore 16 and 18, respectively, as shown in FIG.

Meet the two pointed at their front ends to be driven dowel pins the mutually offset bores 16, 30 and 28, 32 according to Figure 1, then the offsets "E" and "F" are canceled, i. the bore 26 is aligned on End of driving the tension pin with the bore 30 (i.e., the center axes of two holes are essentially in the same place) and also the holes 28 and 32 lose their offset. As a result, the connecting element 20 while generating tension on both legs 22, 24 inwardly against the associated inner wall in the holes 16 and 18 pressed. Accordingly becomes the miter 14 closed exactly and under tension. The corner joint has now already a very good strength.

Subsequently, in one of the third bores 34, 36, for example, the bore 34, injected an adhesive that completely fills the bore 16 to the corner in the bore 18 enters and out of the other third bore 36 again from the Frame part 12 emerges. It is due to the illustrated arrangement of the bore ensures that the adhesive spreads completely and on all sides in the cavities and in particular the connection element is fully enclosed on all sides. For this are conducive recesses 46 (see also Figure 6) in the connecting element 20. Der In particular, adhesive also fills the clearance 38 between the connecting element 20 and the outer wall of the holes 16 and 18. It creates a more complete Positive connection between the connecting element 20, the adhesive and the wood. The Adhesive adheres completely to all interior walls of the holes in the wood. To this Way, the corner joint is stabilized and it is also achieved that the of Connecting element 20 forces exerted on the wood parts over a large area in the wood is introduced so that no adverse deformations occur in the wood. The surface pressure is largely reduced. Any existing inhomogeneities in the Wood will remain without adverse consequences.

Figure 2 shows a section along the line I-II in Figure 1 with another embodiment of the connecting element 22a. While in the embodiment according to Figure 1, the connecting element is a piece of flat iron (see Figure 7, above), is at Embodiment of Figure 2, the connecting element 22a bolt-shaped, i. Has a circular cross section (see also Figure 7, center).

In addition, Figure 2 still shows holes 42 for anchors, in the miter section provide an anti-rotation.

FIG. 3 shows the drilling pattern in an end face of the frame parts 10 (the same applies to FIG the frame part 12) with the holes 16 (for the connecting element 20) and the Holes 42 for dowels (not shown). These holes can be extremely simple Be made without elaborate machines, for example, with a simple Template and a drilling tool. These works do not have to be high Demands on the accuracy and the machine cost of the manufacturer of the system but can easily be "on-site", ie for example, in a joinery or the like executed near the construction site become.

Figure 4 shows a modified Bohrbild an end face of a frame part on the Gehrungsschnitt 14, wherein instead of the holes for the dowels in the embodiment 4, a slot-like milling 44 is provided, into which a plate can be inserted is, which analogous to the dowels causes a rotation.

Figure 5 shows a modified embodiment of a corner joint, wherein the Variation is essentially that the connecting element 20a not is angled. Accordingly, the holes 16a, 18a extend in the frame parts 10 or 12 coaxial. In Figures 1 and 5 are mutually corresponding or function-like Components provided with the same reference numerals, supplemented in Figure 5 respectively with the addition "a". In the embodiment of Figure 5, the offset "k" in the direction of the longitudinal axis of both the rectilinear connecting element 20a as also the coaxial bores 16a, 18a. Even the offset "K" is when driving the dowel pins (not shown) largely canceled, so that the miter fit closed is.

Figure 6 shows an embodiment of a connecting element 20, as it is for Example used in Figure 1.

Figure 7 shows different embodiments of cross sections of the connecting element 20 along the line III-IV of Figure 6.

Figure 8 shows a modification of the embodiment shown in Figures 1 to 7 a corner joint to the effect that instead of a miter cut 14th a blunt shock 14a is provided between the frame parts 10a and 12a. On Connecting element 20b, analogous to the connecting element 20a according to Figure 5, connects the frame parts 10a, 12a at the joining surface 14a. The term "joint surface" So includes both a miter cut 14 (Figure 1) and a connection surface 14a with a blunt impact according to FIG. 8. Cooperating with the connecting element 20a Holes 30b, 32b are indicated in FIG. The function corresponds to the extent of Figure 5 and its description.

Claims (11)

Corner joint for a window frame or the like made of wood, a wood material or plastic, the frame parts (10, 12) in the corner at a joining surface (14, 14 a) are connected, characterized by first holes (16, 18) in the frame parts (10, 12), which start from the end faces of the joining face (14, 14a), at least one connecting element (20, 20a) of a material which is harder than the material of the frame parts (10, 12) and which is inserted in the first bores (16, 18), second bores (26, 28, 26a) in the frame parts (10, 12) that run perpendicularly and at least up to the first bores (16, 18), Bores (30, 32; 30a) in the connecting element (20; 20a), which are aligned with the second bores (26, 28; 26a) except for an offset (E, F; K) prior to assembly of the window frame, and Tensioning pins which are driven into the second bores (26, 28, 26a) and the bores (30, 32; 30a) in the connecting element (20; 20a) with at least partial cancellation of the offset. Corner joint according to claim 1, characterized in that the connecting element (20) has two mutually perpendicular legs (22, 24). Corner joint according to one of claims 1 or 2, characterized by third bores (34, 36; 34a, 36a) in the frame parts (10, 12) which lead to the first bores (16, 18; 16a, 18a), so that a Glue can be pressed through one of the third holes in the first holes and from there into another of the third holes. Corner joint according to one of the preceding claims, characterized in that the connecting element (20; 20a) has smaller dimensions in each direction than the first bores (16, 18; 16a, 18a). Corner joint according to one of the preceding claims, characterized in that the connecting element (20; 20a) is a piece of flat metal. Corner joint according to one of claims 1 to 4, characterized in that the connecting element has bolt-shaped parts. Corner joint according to one of the preceding claims, characterized in that the offset has both a component (E) perpendicular to the direction of the first bore (18) and a component (F) parallel to the direction of the first bore (18). Corner joint according to one of the preceding claims, characterized in that the offset is 0.3 to 1 mm. Corner joint according to one of the preceding claims, characterized in that the dowel pins have a diameter which corresponds to the diameters of the second bores (26, 28) and the bores (30, 32) in the connecting element (20). Corner joint according to one of the preceding claims, characterized by dowels and / or flat pieces which are inserted as Verdrehsicherungen in the end faces of the miter cut (14). Method for producing a window frame or the like from wood, a wood material or plastic, comprising the following steps: Providing rods whose profile corresponds to that of the frame parts (10, 12) of the window frame to be produced and whose length is several times greater than the length of a frame part, Cutting the bars to lengths of the frame parts (10, 12) on site, Drilling first bores (16, 18) in the end faces of the frame parts (10, 12), Drilling second bores (26, 28) in the frame parts (10, 12) vertically and at least up to the first bores (16, 18), Insertion of at least one connecting element (20) made of a material that is harder than the material of the frame parts in the first holes, wherein the connecting element has bores (30, 32), which after insertion of the connecting element in the first holes an offset (E , F, K) with respect to the second bores (26, 28), and Driving dowel pins into the second bores (26, 28) and into the bores (30, 32) in the connecting element to at least substantially cancel the offset.

Images