EP2251521A2 - Profile connector, frame and insect protective grid - Google Patents

Abstract

The connector (2) has two insertion sections (3) connected together and designed for insertion into profile strips (1), where the insertion sections at a surface exhibits a recess e.g. groove (5). A clamping element made of plastic is arranged in the recess. The clamping element protrudes area by area over the surface of the insertion sections. The clamping element is held in the recess in a form-fit manner. Connection between the clamping element and the recess is designed as a dove tail joint. The clamping element consists of flexible plastic.

Description

The present invention relates to a profile connector for connecting profile strips, in particular frame profiles of insect screens, with at least two plug-in sections designed for insertion into the profile strips, wherein the plug sections each have at least one recess on their surface. Furthermore, the invention is directed to a profile frame and an insect screen with a profile frame.

Profile connectors of this type are used for example for producing frame profiles of insect screens. The profile strips are usually for example made of aluminum or plastic hollow profile strips that are mitred to be assembled to form a rectangular frame profile, for example. For this purpose, the profile connectors have two, for example, mutually perpendicular plug-in sections, of which one is completely inserted into one of the hollow sections, so that the two hollow profiles abut each other in miter. Subsequently, the profile strips are pressed by means of a pressing tool with the plug-in sections of the profile connector used. For this purpose, in each case one or more recesses are formed in the surface of the plug-in sections, into which, when the profile connector is inserted, a wall section of the profile strip arranged in the region of this recess is pressed. By the protruding into the recess areas of the respective wall sections of the profile strips thus takes a firm connection between the respective profile strip and the profile connector and thus also between the two profile strips.

A disadvantage of these profile connectors is that for producing the press connection, a corresponding pressing device is required, so that the preparation of corresponding frame profiles is relatively complicated and expensive. In addition, a subsequent separation of the interconnected moldings is no longer possible.

It is an object of the present invention to form a profile connector of the type mentioned, with a simple and reliable connection of moldings is possible without a complex pressing device is required.

Based on a profile connector of the aforementioned type, this object is achieved in that in each case a plastic existing clamping element is arranged in the recess, which protrudes at least partially over the surface of the plug portion.

An inventively designed profile frame comprises a plurality, in particular four profile strips, wherein in each case two profile strips are connected by a profile connector designed according to the invention. An insect screen formed according to the invention comprises a profile frame designed according to the invention and a fabric spanned between the profile strips of the profile frame.

According to the invention thus carried the attachment of the moldings on the profile connector not by corresponding indentations, but by special provided on the profile connector, made of plastic Clamping elements. These clamping elements are held in each case in a recess of the profile connector and project at least partially over the surface of the respective plug sections, that on the one hand insertion of the plug sections in the hollow profile strips is possible, on the other hand, however, the inserted plug section by a corresponding friction connection of the clamping element with the Inner wall of the hollow profile strip prevents withdrawal or at least made more difficult.

Due to the design of the clamping element made of plastic on the one hand, the desired friction between the clamping element and the material of the profile strip can be adjusted by appropriate material properties of the plastic used and on the other can be ensured at the same time that due to the plastic material damage to the inner wall of the profile strip is avoided and a subsequent separation of the compound is basically possible. The respective desired shape of the clamping element can be made very simple due to the formation of plastic, at the same time by the use of plastic, the clamping element is very inexpensive to produce.

According to an advantageous embodiment of the invention, the recess forms an undercut for the clamping element at least in the insertion direction. This is achieved in a simple manner, in particular without additional fasteners, that the clamping element is not displaced when plugged into the profile strips, but is held in its original position in the recess of the profile connector. As a result, a very simple and cost-effective production of the profile connector according to the invention is possible.

According to a further preferred embodiment of the invention, the recess additionally forms an undercut for the clamping element in a direction transverse to the insertion direction. By this second undercut transverse to the insertion direction, an even better fixation of the clamping element in the recess of the profile connector is achieved without additional fasteners would be required. It remains for the clamping element only single translational degree of freedom, which is required for insertion of the clamping element in the recess. By blocking two translatory degrees of freedom, the clamping elements are held securely without additional fastening means in the recesses so that they are arranged in particular captive.

According to a further advantageous embodiment of the invention, the clamping elements are each held in a form-fitting manner in the recess. The positive connection between clamping element and recess can be achieved by a respective, at least partially complementary configuration of the outer contour of the clamping elements and the corresponding inner contour of the recess. Advantageously, for example, the connection between the clamping element and the recess is formed as a dovetail connection, with the two substantially mutually perpendicular translational degrees of freedom are blocked and only the third translational degree of freedom allows a corresponding movement of the clamping element relative to the recess having plug-in portion.

The region of the clamping element projecting beyond the surface of the plug-in section preferably has an insertion bevel sloping in the insertion direction. In this way it is achieved that an insertion of the respective plug-in sections in the moldings with reduced force is possible while pulling in the opposite direction prevents or at least significantly more difficult.

According to a further advantageous embodiment, the clamping element consists of an elastic plastic. As a result, the required dimensional accuracy for the production of the clamping element is reduced, since both the onset of the clamping element in the recess and when inserting the profile connector in the moldings by the elasticity of the plastic possibly existing excess dimensions of the clamping element can be compensated and inserting or plugging despite a such excess is possible.

Advantageously, the plug-in sections are made of metal, in particular of a light metal or a light metal alloy, preferably of aluminum or an aluminum alloy. In this case, the plug-in sections can be formed as individual parts and connected to each other or formed integrally with each other.

According to a further advantageous embodiment of the invention, the plug-in portions are arranged substantially at right angles to each other. As a result, for example, in the case of a profile connector with two plug-in sections, corresponding corner connectors for frame profiles can be created. In principle, it is also possible that the plug-in sections are arranged at a different angle to each other from the right angle to each other, for example, to provide corresponding non-rectangular frame profiles. The arrangement at an angle of 180 ° is possible to connect, for example, two profile strips lying in the longitudinal direction one behind the other. In principle, it is also possible that the profile connectors have more than two plug-in sections, for example three or four mating sections to create T-shaped or cross-shaped connections of moldings.

According to another preferred embodiment of the invention, a plurality of recesses are formed with clamping elements at each plug-in portion. In this case, for example, a clamping element may be arranged in the region of an insertion-side end of the plug-in section and a further clamping element in the region of the opposite end of the plug-in section. In this way, an even safer connection of the profiled connectors connected to one another is achieved. In principle, further recesses can also be formed on the plug-in sections, via which a compression of the profile connector with the profile strips can take place in a known manner in order, for example, to further increase the stability of the connection. It is also possible that these additional recesses or the recesses receiving the clamping elements, after removal of the clamping elements, are used as embossing recesses if, in certain applications, a customary fastening of the profile strips by a corresponding pressing operation is desired.

According to a further advantageous embodiment of the invention, the profile connector for connecting a corner connector is formed as an angle profile, wherein the clamping elements each protrude beyond the outer surface of the angle profile. In principle, the arrangement of the clamping elements is also possible in such a way that they project beyond the inner surfaces of the angle profile or over these side surfaces.

Advantageously, the recesses are formed as grooves or as openings. A groove-shaped design of the recesses is particularly suitable in relatively narrow surfaces of the plug-in sections, while Openings, ie recesses, which extend completely through the material of the plug-in sections, in particular in wider surface areas of the plug-in sections are possible.

Further advantageous embodiments of the invention are specified in the subclaims.

Fig. 1

eine Draufsicht auf einen erfindungsgemäß ausgebil- deten Profilrahmen mit vier erfindungsgemäß ausge- bildeten Profilverbindern vor dem Zusammenstecken,

Fig. 2

eine erste Ausführungsform eines erfindungsgemäß ausgebildeten Profilverbinders in der Vorderansicht,

Fig. 3

eine Draufsicht auf den Profilverbinder nach Fig. 2,

Fig. 4

eine weitere Ausführungsform eines erfindungsgemäß ausgebildeten Profilverbinders,

Fig. 5

eine Teilansicht einer weiteren Ausführungsform eines erfindungsgemäß ausgebildeten Profilverbinders,

Fig. 6

eine Teilansicht einer weiteren Ausführungsform eines erfindungsgemäß ausgebildeten Profilverbinders, und

Fig. 7

einen Längsschnitt durch den Profilverbinder nach Fig. 6 entlang der Linie A-A.

The invention will be described in more detail below by means of embodiments with reference to the drawings; in these show:

Fig. 1

2 a top view of a profile frame designed according to the invention with four profile connectors designed according to the invention before being plugged together,

Fig. 2

A first embodiment of an inventively designed profile connector in front view,

Fig. 3

a plan view of the profile connector after Fig. 2 .

Fig. 4

a further embodiment of a profile connector designed according to the invention,

Fig. 5

a partial view of another embodiment of an inventively designed profile connector,

Fig. 6

a partial view of another embodiment of an inventively designed profile connector, and

Fig. 7

a longitudinal section through the profile connector after Fig. 6 along the line AA.

Fig. 1 shows four moldings 1, which are each formed as hollow profiles and are mitred at their ends to be assembled into a profile frame.

In the region of each corner to be formed between two profiled strips 1, one profile connector 2 designed as a corner connector is arranged, each of which comprises two plug-in sections 3 arranged perpendicular to one another. The profile connectors 2 are formed axially symmetrical to their respective bisectors.

In the area between the profiled strips 1, a mesh fabric 4 is arranged, which is hung after assembly of the profiled strips 1 in grooves 5 of the moldings 1 in a conventional manner, so that ultimately an insect screen is generated.

The detailed structure of the profile connector 2 is described below with reference to FIGS. 2 and 3 described in detail.

The plug sections 3 each form a leg of the integrally formed profile connector 2 and are preferably made of a light metal, such as aluminum. In principle, the connectors 3 can also be made of a different material, in particular of a plastic material, as long as the required stability of the profile connector can be ensured.

The profile connector 2 has outer surfaces 6, in which a plurality of recesses 7, 8 is formed. The recesses 8 have their extension in the longitudinal direction of the respective plug section 3 limiting Side walls 9, which are arranged obliquely so that the recesses 8 expand toward the outer surfaces 6 out.

In contrast, corresponding to the recesses 7 in the longitudinal direction of the plug-in sections 3 limiting side walls 10 are inclined so that the recesses 7 taper to the outer surfaces 6 out.

In the recesses 7 each consisting of a plastic clamping element 11 is arranged, which is received positively in the recess 7. For this purpose, the clamping element 11 lies substantially flat on the bottom of the respective recess 7 and has obliquely extending side surfaces 12, which are inclined corresponding to the walls 10. The thickness of the clamping elements 11 is at least partially greater than the depth of the recesses 7, so that the clamping elements 11 protrude in regions over the outer surface 6, as it is made Fig. 2 can be seen. In this case, the over the outer surfaces 6 projecting portion 18 of the clamping member 11 is provided in each case with an insertion bevel 13, which is formed in each case sloping towards the free end 14 of the respective plug section 3.

Out Fig. 3 Furthermore, it can be seen that the width of the clamping elements 11 substantially corresponds to the width of the plug-in sections 3, so that the side surfaces 15 of the entire profile connector 2 are substantially smooth and flat.

On the inner surfaces 16 of the profile connector 2 further recesses 17 are formed, which have a similar shape as the recesses 8 on the outer surfaces 6 of the profile connector 2. Furthermore, in the areas of the free ends 14 of the plug-in sections 3 each holes 17th formed, which contribute to a weight reduction of the profile connector 2.

• Wie in Fig. 1 gezeigt, ist jeweils ein Profilverbinder 2 zur Verbindung von zwei Profilleisten 1 vorgesehen. Dazu wird zunächst einer der Steckabschnitte 3 des Profilverbinders 2 in einen im Endbereich der Profilleiste 1 angeordneten, sich in Längsrichtung erstreckenden Hohlraum eingesteckt. Dieser Hohlraum besitzt dabei eine Querschnittsfläche, die zumindest bereichsweise der Querschnittsfläche des Steckabschnitts 3 bzw. deren Querschnitts-Hüllkurve entspricht, so dass nach vollständigem Einstecken des Steckabschnitts 3 dieser im Wesentlichen spielfrei in dem Hohlraum angeordnet ist.

The profile connector according to the invention Fig. 2 is used as follows:

• As in Fig. 1 shown, a profile connector 2 for connecting two moldings 1 is provided in each case. For this purpose, one of the plug-in sections 3 of the profile connector 2 is first inserted into a arranged in the end region of the profile strip 1, extending in the longitudinal direction cavity. In this case, this cavity has a cross-sectional area that at least partially corresponds to the cross-sectional area of the plug-in section 3 or its cross-sectional envelope, so that after complete insertion of the plug-in section 3 it is arranged substantially free of play in the cavity.

Due to the protruding over the outer surface 6 areas 18 of the clamping elements 11 takes place a clamping or frictional connection between the inside of the cavity of the moldings 1 and the profile connector 2. Due to the formation of the clamping elements 11 made of plastic these are compared to those made of harder material trained plug-in sections 3 compliant, so that a corresponding deadlock between the profile strip 1 and profile connector 2 takes place.

Due to the insertion bevels 13 despite this excess of the clamping elements 11 plugging in a direction of insertion shown according to arrow 19 is easily possible, whereas pulling out the profile connector 2 against the insertion due to the acting in the opposite direction insertion 13 is difficult. In principle, however, due to the formation of the clamping elements 11 made of plastic with a correspondingly higher force and an already inserted profile connector 2 are pulled out of a profile strip 1 again. It is given by the training of plastic and the selected shape of the clamping member 11 still with inserted profile connector 2, a sufficiently strong and secure connection between the profile connector 2 and the two moldings and between the two moldings with each other.

The second plug-in portion 3 is inserted in the same way in the second profile strip 1 until the two miter cuts of the profile strips 1 abut each other seamlessly. In the same way, the other profile strips 1 are each connected to each other via corresponding profile connector 2, so that ultimately a closed and inherently stable frame profile is generated.

This can be completed by inserting a corresponding fabric, for example in the form of an insect screen mesh fabric, an anti-electrosmog fabric or other covering, for example for sun protection.

Due to the special shape of the recesses 7 and the clamping elements 11 adapted thereto, undercuts between the respective plug-in section 3 and the clamping element 11 are formed not only in the insertion direction but also in the opposite direction and transversely to the insertion direction. As a result, a secure fit of the clamping elements 11 is ensured in the recesses 7. The clamping elements 11 can easily in a direction perpendicular to the plane of the Fig. 2 according to an arrow 20 (see Fig. 3 ) are inserted into the recesses 7. By limiting the movement to a single translational degree of freedom and the corresponding formation of the Clamping elements 11 made of plastic is given without further fastening elements sufficient fixing of the clamping element 11 in the respective recess 7, so that it is arranged captive.

The recesses 8 can be used in addition to or in the event of non-use of the clamping elements 11 to allow in a conventional manner an attachment of the profile connector 2 by appropriate pressing with the moldings 1. Similarly, the recesses 17 can be used. In addition, a reduced weight of the profile connector 2 is achieved by the recesses 17.

In the description of the following embodiments, the same reference numerals are used for the same or similar elements as in the description of the first embodiment.

Fig. 4 shows an embodiment of a profile connector 24 with clamping elements 20 which have a substantially circular cross-section and are arranged in recesses 21 which have a corresponding part-circular cross-section. In this embodiment too, a region 30 of the respective clamping element 20 projects beyond the outer surface 6 of the respective plug-in section 3, so that the clamping according to the invention with the profile strips 1 is ensured.

Fig. 5 shows further embodiments of clamping elements 22 with different shapes as well as correspondingly formed recesses 23 with adapted to the clamping elements 22 forms. The illustrated four different clamping elements 22 are shown only as an example on a single plug-in section. In principle, the clamping elements can be connected to a plug-in section or to a profile connector each identical or as in Fig. 5 shown to be designed differently.

Common to all clamping elements that they are made of plastic and each have a over the outer surface 6 and the inner surface 16 projecting area. Furthermore, the illustrated clamping elements 22 are each formed so that they each form with the corresponding recesses 23 undercuts in and against the insertion direction and transversely thereto to be securely attached both during insertion and when pulling out the profile connector 2 and moreover falling out in a direction perpendicular to the outer surface 6 and to the inner surface 16 to prevent.

In Fig. 6 a further embodiment of a profile connector 25 is shown, the recesses 26 has in the form of openings or holes. These recesses 26 extend from a side surface 15 through the respective plug portion 3 to the opposite side surface 15 and have a substantially circular cross-section. In principle, the cross-sectional shape can also deviate from the circular shape and, for example, triangular, rectangular, in particular square, or be formed in another way.

As seen from the longitudinal section Fig. 7 can be seen, 26 each clamping elements 27, 28 are arranged in the recesses, which also extend over the entire width of the plug-in section 3. Here are in Fig. 7 two clamping elements 27 are shown, which protrude with only one end on one of the side surfaces 15 and there are each provided with an insertion bevel 29, which again extends sloping in the insertion direction. By way of example, a further clamping element 28 is shown, which protrudes with both ends over the two side surfaces 15 and There is each provided with chamfers 29. In principle, the clamping elements described in the different embodiments can each be provided only in one form on a profile connector or mixed with one another in different configurations.

LIST OF REFERENCE NUMBERS

1

moldings

2

profile connector

3

staking portions

4

mesh

5

groove

6

exterior surfaces

7

recesses

8th

recesses

9

side walls

10

side walls

11

clamping elements

12

faces

13

bevels

14

free end of the plug sections 3

15

faces

16

inner surfaces

17

recesses

18

protruding areas

19

arrow

20

clamping elements

21

recesses

22

clamping elements

23

recesses

24

profile connector

25

profile connector

26

recesses

27

clamping elements

28

clamping element

29

bevels

30

protruding areas

Claims (15)

Profile connector for connecting profiled strips (1), in particular of frame profiles of insect screens, with at least two plug-in sections (3) designed for insertion into the profiled strips (1), the plug sections (3) being provided on their surface (6, 15, 16 ) each have at least one recess (7, 23, 26),
characterized,
in that in each case a clamping element (11, 20, 22, 27, 28) made of plastic is arranged in the recess (7, 23, 26), which projects beyond the surface (6, 15, 16) of the plug-in section (3) at least in regions , Profile connector according to claim 1,
characterized,
that (7, 23, 26) at least in the direction of insertion, an undercut for the clamp member (11, 20, 22, 27, 28) forms the recess. Profile connector according to claim 1 or 2,
characterized,
in that the recess (7, 23, 26) forms an undercut for the clamping element (11, 20, 22, 27, 28) in a direction transverse to the direction of insertion. Profile connector according to at least one of the preceding claims,
characterized,
in that the clamping elements (11, 20, 22, 27, 28) are each held in a form-fitting manner in the recess (7, 23, 26). Profile connector according to at least one of the preceding claims,
characterized,
in that the connection between the clamping element (11, 20, 22, 27, 28) and the recess (7, 23, 26) is formed as a dovetail connection. Profile connector according to at least one of the preceding claims,
characterized ,
that on the surface (6, 15, 16) of the male portion (3) protruding region (18, 30) of the clamping element (11, 20, 22, 27, 28) has a sloping in the direction of insertion chamfer (13, 29). Profile connector according to at least one of the preceding claims,
characterized,
in that the clamping element (11, 20, 22, 27, 28) consists of an elastic plastic. Profile connector according to at least one of the preceding claims,
characterized,
in that the plug-in sections (3) consist of metal, in particular of a light metal or a light metal alloy, preferably of aluminum or an aluminum alloy. Profile connector according to at least one of the preceding claims,
characterized,
in that the plug-in sections (3) are arranged essentially at right angles to one another. Profile connector according to at least one of the preceding claims,
characterized,
in that a plurality of recesses (7, 23, 26) with clamping elements (11, 20, 22, 27, 28) are formed on each plug-in section (3). Profile connector according to at least one of the preceding claims,
characterized,
that the recesses (7, 23, 26) are formed as grooves or as openings. Profile connector according to at least one of the preceding claims,
characterized,
that a clamping element (11, 20, 22, 27, 28) in the region of a einsteckseitig located end (14) of the male portion (3) and a further clamping element (11, 20, 22, 27, 28) in the region of the opposite end of the plug section (3) is arranged. Profile connector according to at least one of the preceding claims,
characterized ,
in that the profile connector (2, 24, 25) is designed as an angle profile for forming a corner connector, and the clamping elements (11, 20, 22, 27, 28) respectively project beyond the outer surfaces (6, 15, 16) of the angle profile. Profile frame with a plurality, in particular four profiled strips (1), wherein in each case two profiled strips (1) by a profile connector (2, 24, 25) are connected to each other according to at least one of the preceding claims. Insect screen with a profile frame according to claim 14 and between the profile strips (1) of the profile frame spanned fabric (4).

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