DE102016116340A1 - Connecting element for tubular profiles - Google Patents

Abstract

The invention relates to a connecting element (20) for tubular profiles (12) to their end-side connection with each other, wherein the connecting element (20) consists of a sheet material, made of one or more foldable and / or zusammensteckbaren blanks and / or sheets. The invention further relates to a blank of a sheet material, cut out, pre-punched and / or pre-drawn to form at least a part of a connecting element (20) and / or a receiving body for the tubular profiles. The invention also relates to a panel element for a multi-dimensional profile arrangement, comprising tubular profiles (12) and connecting elements (20), wherein the tubular profiles (12) are joined by means of at least one connecting element (20), wherein at least one of the tubular profiles (20) 12) framed areas the panel element can be used.

Description

The invention relates to a connecting element for tubular profiles to their end-side connection with each other, in particular by means of plug connection. These pipes are provided with any cross-section.

State of the art

Such connecting elements are known from the prior art. This is what the document says CH 429 317 A a pipe joint for the frame before, in which for releasably connecting the first ends of pipes together a connection head is provided with a threaded bore to each such profile end extending in the axial direction and in which a projecting into the pipe end cap screw is screwed.

From the publication EP 0 007 065 A1 is an exhibition furniture or home furniture and game and sports equipment is known, comprising cylindrical connecting pipes and connectors, each having at least two molded onto a neck portion cylindrical connector neck. Plug-in units are each formed by the plug connection of a connector socket and the end of a connecting tube connected to it. Each of the two ends of each connecting tube has at least one wall opening and each connector neck at least one wall opening, of which the wall opening formed in the radially inner part of each plug unit is provided with a cross-sectional shape deviating from the circular shape. However, the production of the connection is very complicated.

Other mechanical connection systems, in which usually a connecting element is clamped in a pipe opening, disclose the publications NL 1004046 C . NL 1016054 C . US Pat. No. 3,648,404 . US Pat. No. 3,830,011 and US 4 551 127 A ,

Also the publication DE 202 21 433 U1 describes a connection system. In this case, a fixed connection between at least one first and one second elongated magnetic module with each other and with a ferromagnetic module comprises, wherein these modules are magnetically anchored together in a construction, a grid structure arrangement. In order to realize the intended function, however, magnets are required.

Another connection by means of magnetic force describes the document DE 39 10 304 A1 with a kit consisting of components and couplings. The components have ferromagnetic contact surfaces and the couplings are designed as permanent magnets or contain such. The components can be detachably connected to one another via the couplings by magnetic adhesion. Again, magnets are essential.

The publication DE 26 51 656 A1 describes a set of components for a construction game with at least two each multiple existing types of components that are connectable by connectors, wherein one of the components a connector rod and the other components have at least two mutually at any angle plug couplings, with which match the ends of the connector rods. The plug rods are made of wood, while serving as connectors, solid components can be made of plastic. Such connectors require a lot of space for storage.

The toy building set of pipes and corner joints for the creation of triangular, quadrangular and polygonal area and volume figures after publication DE 39 43 364 A1 provides overstretchable surfaces. The corner connectors are designed as a ball, which consists of four or eight segments, which are concentric with a central part and firmly connected thereto. For spanning cardboard or flexible fabrics are provided. Elastic elements located at the corners of the boards or flexible fabrics are connected under tension to brackets on the corner connectors. Alternatively, the cardboards and the flexible fabrics are trimmed at the corners and have at each corner a receiving hole for an elastic element consisting of a keyhole lock and a resilient loop. Thus, additional elements will be required in each case.

Another proposal for a toy contains the document DE 201 06 446 U1 , This toilet rolls are to be used as a toy and / or plug connection. The toilet paper rolls can be connected to one another by means of a screwing and / or plug-in system and / or another system, although nothing is stated concretely how the invention should be executable. The following materials are indicated: wood, metal, plastic, glass, ceramics. Accordingly, additional materials are needed to practice the invention, as far as it is disclosed.

Further toy building sets show the pamphlets WO 1999/013954 A1 . EP 0 164 271 B1 . US Pat. No. 4,642,063 . CN 101678241 B . US 2012/0184174 A1 . US 5 049 105 A and US 4,764,143 A ,

The proposed in the prior art fasteners are bulky and therefore require a lot of space during transport and Storage. They can only be produced by means of a complex shaping process and are therefore expensive.

Object of the invention

Object of the present invention is therefore to propose a connecting element that is simple and inexpensive to produce and can be easily transported and stored.

solution

The object is achieved by a connecting element for tubular profiles to the end-side connection with each other, which consists of a sheet material. It is made of one or more foldable and / or joinable blanks.

Preference is given as sheet materials paper, cardboard or cardboard and / or as tubular profiles reused cardboard tubes, as they are known from toilet paper or kitchen rolls provided. Such materials are readily available, inexpensive and environmentally friendly, most importantly, the various roll cores are waste which can be recycled by the invention.

An advantageous embodiment has a connecting element with at least one separate receiving body, which can be directly connected to the tubular profile. Therefore, a three-dimensional surface figure has proven to be advantageous as a connecting element, the slots in their lateral surfaces, the surfaces, in the receiving body, which are designed to accommodate the tubular profiles on its inner circumferential surface or inner and outer lateral surface at the same time, preferably by means of receiving body tabs, used are.

Receiving body tabs are tabs on the receiving body, which also includes a single tab of the invention, with which the receiving body is connected by a plug connection with the three-dimensional surface figure.

The surfaces considered are all surfaces of the three-dimensional surface figure, regardless of their geometric shape, which delimit them from their surroundings. As geometric shapes are mainly polyhedra, z. As cube or tetrahedron provided. In the lateral surfaces recesses are introduced, which are designed as slots. The slots are designed so that the receiving body tabs can be inserted for mounting the receiving body to the three-dimensional surface figure in the slots. In particular, the arrangement of the slots on the lateral surface coincides with the arrangement of the receiving body pockets at one end of the receiving body.

A preferred arrangement of the slots has two slots each in two opposing locations, with the first pair of slots rotated 90 degrees from the second pair of slots. The slots thus arranged hold the receiving body at the sides and are particularly suitable for receiving body with polygonal cross-section, which are provided for receiving the tubular profiles on its inner circumferential surface.

An alternative arrangement of the slots has two intersecting slots, in the receiving body can be used particularly advantageous, which are designed as an entangled surface object. In an alternative embodiment, these receiving bodies have only one receiving body plug-in tab which can be inserted into a single corresponding slot in the lateral surface of the three-dimensional surface figure.

The receiving body are after erecting, folding or assembling the blanks in the places where they are needed in the three-dimensional surface figure, the z. B. is formed as a folding cube, inserted by the receiving body tabs of the receiving body are inserted into the slots in the lateral surfaces of the three-dimensional surface figure.

The inclusion of the tubular profiles on the receiving body takes place on its inner and / or outer lateral surface, preferably on the inner lateral surface or on the inner and outer lateral surface at the same time, particularly preferably alone on the inner lateral surface, depending on the design of the receiving body. A first embodiment of the receiving body has a polygonal, angular, for example quadrangular, cross section, so that edges are formed. These edges have a diagonal dimension which is slightly larger than the inner diameter of the tubular profile. As a result, the tubular profile clamps on the receiving body.

A further embodiment of the receiving body is designed as an entangled surface object and formed from at least two by means of central, longitudinally shaped elongated slots nested flat pieces. At least one of the sheets has at one end a receiving body tab. However, the preferred embodiment of this variant of the receiving body comprises two receiving body tabs, one for each flat piece. One of the receiving body tabs is slotted so as not to hinder the nesting of the sheets. Such a receiving body is particularly easy to manufacture and assemble, since no fold lines must be introduced and also no folding is to be made.

The embodiment of the receiving body as an entangled surface object is designed so that the reception of the tubular profiles by means of receiving slots. These are introduced into the narrow sides of the sheets with respect to the receiving body tabs, so at the other end. In the preferred embodiment, two receiving slots are introduced in each flat piece whose distance from one another corresponds to the diameter of the tubular profiles. In order for these to clamp on the receiving body, the width of the receiving slots is less than the wall thickness of the tubular profiles, so that the wall of the tubular profile is pressed into the receiving slot and held therein by static friction.

As an alternative to the above-described clamping between the wall of the tubular profiles and the receiving slots, it is also provided in the context of a simplified embodiment that the clamping takes place only from the inside of the tubular profiles forth, similar to the receiving bodies with polygonal, angular cross-section. Then can be dispensed with the receiving slots.

The receiving slots may have at the outer ends a small V-shaped widening, which is the fitting of the tubular profiles, for. As the cardboard rolls, easier. The receiving slots, but also all other described slots, can provide through modifications for an improved hold of the inserted therein objects (eg tabs, profiles, sheets). These include versions with corrugated or toothed edges of the slots, but also designs that are intended for anchoring of locking lugs on the tabs.

A further embodiment of the invention provides a connecting element, which is designed as an entangled surface object. In this variant, no receiving body with, for example, square profile in the connecting element on the one hand and the interior of the tubular profile on the other hand plugged. Instead, at least two by means of long slots cross-nested blanks, referred to as sheets, provided, which form the connecting element. The flat pieces in turn have receiving slots for receiving tubular profiles (similar to the receiving slots in the receiving bodies of nested flat pieces) in which the wall of the tubular profile is in particular positively and / or frictionally receivable. An undersize in the width of the receiving slots of the sheets with respect to the wall thickness of the tubular profiles also ensures a sufficiently large pressure and friction between the connecting element and the tubular profile.

This variant has the advantage that each tubular profile is held at four points of its wall inside and outside, which increases the stability of the connector, in particular against withdrawal forces. In addition, a particularly simple production and assembly are possible, v. a. since no receiving body is needed.

In order to be able to apply tubular profiles to the connecting element composed of flat pieces in all three spatial directions, a third flat piece has proven to be advantageous, which is added to the first flat piece, preferably also by insertion, after the first has been joined to the second flat piece. The third sheet is preferably made in two parts, so that it can be easily used. It is slotted for this purpose by short slits and is inserted from two opposite sides on the first, prepared for this purpose flat piece in there corresponding short slots.

Safety noses are provided according to a particularly advantageous embodiment in the first and / or second part of the third sheet. These can be passed through recesses in the second flat piece to build up the entangled surface object. They can be inserted into securing notches corresponding to the securing noses in the respective other part of the third flat piece. The additional securing lugs are located on the straight sides of the two parts of the third flat piece, which engage in the additional recesses in the second flat piece and thereby advantageously reach into the opposite part, where the additional securing notches are located, with appropriate design. As a result, an increased positional stability of the two parts of the third sheet is achieved.

Another connecting element according to the invention is a flexible connecting element, in turn designed as a three-dimensional surface figure, wherein the receiving body are integrally connected via a hinge region with the three-dimensional surface figure or its central connection surface. Each receiving body is tiltable relative to the connecting surface out of a plane in at least one direction and about a tilting axis, wherein all tilting axes lie in a plane which defines the hinge region. This connecting element makes it possible in its preferred embodiment, aufzustecken four tubular profiles on the integrated receiving body and the angle in relation to the plane in any desired at least to change direction. This is z. B. helpful when building pointed roofs for a play object or chemical molecule models. Part of the invention are also constructed analogously to the solution described above connecting elements with a different number of fittings or a greater distance between the connecting surface and the Anschlusstücken. With a larger number than four receiving body, the additional receiving body can be added to the blank later, z. B. by gluing.

It has proven advantageous in an alternative embodiment, if at least one of the receiving body of the flexible connecting element is designed as an entangled surface object of at least two intertwined by long slots flat pieces. For this purpose, one of the blanks, the first flat piece, part of a flexible connecting element and the second part, the second flat piece is added separately.

A further variant of the invention has the difference that the flat pieces are not only plugged together, but are glued together (eg already during production). For this purpose, the shape of the flat pieces for receiving adhesive is advantageously changed slightly in a preferred embodiment, also some parts can be provided in two parts. The bonding is preferably carried out so that the product is still flat collapsible. When building then only the corresponding areas are unfolded and erected the connecting element thereby. Depending on the technical requirements, additional adhesive levels on other parts must be added for bonding.

If the bonding is used, as an alternative to bonding complete flat pieces, connecting elements and receiving bodies based on flat pieces can also be produced in such a way that no elongate slots are used. Instead, the sheets are completely in the direction of the long slots and beyond this completely broken, z. B. cut apart, so that form separation edges. At these separation edges or cut edges, the sheets are joined together, preferably glued together.

The object of the invention is also achieved by a blank of a sheet material, cut, pre-punched and / or with pre-cut and / or fold lines for forming at least a part of a three-dimensional object, wherein the three-dimensional object is a connecting element and / or a receiving body. A pre-drawn or pre-cut blank must be brought by the user in the intended form or contour. The sale as a blank is particularly advantageous because shipping is easy and the manufacturing cost is low.

The object of the invention is also achieved by a multi-dimensional profile arrangement comprising tubular profiles and connecting elements according to the preceding description, wherein the tubular profiles are joined together by means of at least one connecting element in a manner as described above. In at least one of the surfaces framed by the tubular profiles, a panel element can be used in the profile arrangement. Panels of any basic shape can be used to close the open areas remaining as the frame members when constructing constructions of cardboard tubes and fasteners between the cardboard tubes. They are preferably adapted to the dimensions of conventional rolls (eg of toilet paper rolls or kitchen rolls of paper), but can easily be adapted to other dimensions with simple means (scissors, cutter). The panels described below are adapted to the connecting elements according to the invention, so that a (child) easy application is ensured.

A first embodiment provides at least one panel element which has at least one corner via a double insertion tab, which can be inserted into prepared or existing slots of the connecting element. For this purpose, also existing slots for the receiving body can be used if no receiving body is used there. But it is also envisaged to introduce separate panel slots for the attachment of the panels in the connecting element. In the slots, the double tab clamps by a force or friction fit and holds the panel in its intended position. Also for these slots, the possibilities described above for improving the frictional connection are applicable.

A panel typically has four corners and is square or rectangular. However, the invention also includes other forms, for. B. triangles. The panel has in the corner the two tabs, which together form the double tab. The tabs are bent 90 ° backwards for insertion into the slots, and then inserted into the existing slots of the connecting element. Panels of this type are particularly suitable for the connecting elements, which are designed as a three-dimensional surface figure, for example as a cube-shaped connecting element.

A second embodiment provides at least one panel element having at least one corner over a single tab, the is insertable into a slot of the connecting element. For this purpose, one of the existing slots for the receiving body is available, if there is no receiving body used. But it is also envisaged to introduce separate panel slots for the attachment of the panels in the connecting element. In the slot, the Einfachstecklasche stuck by a force or friction fit and holds the panel in its intended position. The panel has the tab in the corner, designed as a single tab. The tab is bent backwards (by 90 °) and inserted into a panel slot additionally available in the connecting element. Panels of this type are particularly suitable for the fasteners designed as an interlaced surface object. The connecting elements designed as a three-dimensional surface figure can also be equipped with an additional panel slot, so that it is also possible to accommodate single-use tabs.

The invention also relates to the use of a connecting element or a multi-dimensional arrangement, as described above, as a toy, construction element, furniture, teaching aids, building material or works of art.

application

Children love to build, to construct, to shape. The invention promotes the creativity of children, since this construction system consists of the simplest materials, can be used for many different constructions and also z. B. by painting, any shortening of the rollers, the fasteners and the panels with a pair of scissors or by adding other materials can be developed individually. In addition, the system is easy to understand and easy to use for children. It quickly creates large structures, making your own work after a short time visible and usable. In the game, the tubular profiles can be connected by means of the connecting elements to any figures. The system can be used as a building system for children, for example, to build playhouses, shops, knight castles, Kaspertheater, rockets, spaceships or even fantasy.

Also for the construction of furniture, the connecting elements with the tubular profiles form a structure that can also be clad with the panels to be assembled into a suitable piece of furniture. Here is a use z. B. for the construction of exhibition stands, counters, partitions, furniture and models for illustrating scientific relationships into consideration.

The preferred embodiment of the invention is a system for connecting cardboard rolls. The system in this embodiment consists of cardboard rolls (eg cores of kitchen rolls, toilet paper rolls and plotter paper rolls to carpet rolls for building large structures), the connecting elements (preferably also made of cardboard) and, if provided, the panels (preferably also of cardboard ). It is a plug-in system in which the cardboard rolls are plugged into the fasteners and thus any constructions arise. The panels can also be infected to z. B. to close walls.

Advantages of the invention

• • alle Elemente aus nachwachsenden Rohstoffen (Pappe) bestehen;
• • alle Elemente aus recyceltem und recycelbarem Material (Pappe) bestehen;
• • Papprollen in allen Haushalten, v. a. in Haushalten mit Kindern, in großen Mengen anfallen und mit der Erfindung diese Abfallprodukte auf einfachste Weise in größeren Mengen wiederverwendet und einem sinnvollen Zweck zugeführt werden;
• • alle Elemente nach der Benutzung einfach im Papiermüll entsorgt werden können, da sie aus Pappe bestehen.

Hereinafter, further advantages of the invention are named. The system according to the invention in its preferred embodiment is highly environmentally friendly since

• • all elements are made of renewable raw materials (cardboard);
• • all elements are made of recycled and recyclable material (cardboard);
• • Cardboard rolls in all households, especially in households with children, incurred in large quantities and with the invention of these waste products in the simplest way in larger quantities reused and fed to a meaningful purpose;
• • All items can simply be disposed of in waste paper after use as they are made of cardboard.

The system is inexpensive, since the manufacturing costs of the invention are relatively low and thus the price is attractive to many income brackets as well as daycare centers and schools. The cardboard rolls are free in large quantities and can be collected by families, grandparents, schools, etc. Collective gathering can also enhance the sense of community.

The invention is efficient in their manufacture, storage and shipping, since the elements, in particular the blanks for the fasteners and the receiving body, are technically not very complicated to manufacture and therefore with conventional machines, as z. B. from the packaging industry, can be produced in large quantities. The blanks or flattened fasteners are flat and small. They can therefore be stored and shipped cost-saving.

The multi-dimensional profile arrangement, as the invention provides, has a high stability and safety. The with the system to be built constructions are largely stable. The individual elements can also be glued in addition with commercial adhesive to increase the stability even further. The panels further increase the stability of the built structure. Despite its high stability, the system, especially in the preferred embodiment, is lightweight, since all elements are made of cardboard. There is no risk of injury if a part falls down or something falls over during construction.

Overview of the drawings

Further details, features and advantages of the invention will become apparent from the following description of exemplary embodiments with reference to the accompanying drawings. Show it:

1 : Schematically, an embodiment of a profile arrangement according to the invention;

2 FIG. 2: a schematic sectional view of an embodiment of a receiving body according to the invention, designed as a hollow profile, with a tubular profile attached; FIG.

3 : Schematically an embodiment of a profile arrangement according to the invention during assembly of the tubular profiles;

4a FIG. 2 schematically shows an embodiment of a blank according to the invention for a cube-shaped connecting element; FIG.

4b : Schematically, an embodiment of a cube-shaped connecting element according to the invention;

5a : schematically an embodiment of a blank according to the invention for a receiving body, designed as a hollow profile;

5b : Schematically, an embodiment of a receiving body according to the invention, designed as a hollow profile;

6a FIG. 2: schematically, in perspective, an embodiment of a first blank according to the invention for a receiving body, designed as an interlaced surface object; FIG.

6b FIG. 2: schematically, in perspective, an embodiment of a second blank according to the invention for a receiving body, designed as an interlaced surface object; FIG.

6c FIG. 2: schematically, in perspective, an embodiment of a receiving body according to the invention, designed as an interlaced surface object; FIG.

6d : Schematically an embodiment of a receiving body according to the invention 26 ' as a variant of the receiving body 26 ;

7a : schematically in perspective, partially transparent representation of an embodiment of a connecting element according to the invention, designed as an entangled surface object;

7b FIG. 2 schematically shows an embodiment of a first flat piece of a connecting element according to the invention, designed as a folded surface object; FIG.

7c FIG. 2 schematically shows an embodiment of a second flat piece of a connecting element according to the invention, designed as an interlaced surface object; FIG.

7d schematically an embodiment of a third, two-part flat piece of a connecting element according to the invention, designed as an entangled surface object;

7e : schematically in detail an embodiment of any flat piece;

8a FIG. 2 schematically shows a further embodiment of a first flat piece of a connecting element according to the invention, designed as an interlaced surface object; FIG.

8b FIG. 2 schematically shows a further embodiment of a second flat piece of a connecting element according to the invention, designed as an interlaced surface object; FIG.

8c FIG. 2 schematically shows a further embodiment of a third, two-part flat piece of a connecting element according to the invention, designed as an interlaced surface object; FIG.

9 : Schematically an embodiment of a profile arrangement according to the invention with a flexible connecting element;

10 : Schematically an embodiment of a flexible connecting element according to the invention;

11a FIG. 2 schematically shows an embodiment of a blank for a flexible connecting element according to the invention; FIG.

11b : Schematically an embodiment of a flexible connecting element according to the invention;

12a : Schematically, an embodiment of a connecting element according to the invention with inserted panel element with double insertion tab;

12b : schematically in front view an embodiment of a panel element according to the invention with double insertion tab;

12c : schematically in front view an embodiment of a panel element according to the invention with double insertion flap with folded tabs;

12d FIG. 2: schematically, in side view, an embodiment of a panel element according to the invention with a double insertion flap with folded-over tabs; FIG.

13a : schematically in perspective transparent representation of an embodiment of a connecting element according to the invention with inserted panel element with single insertion tab;

13b FIG. 2: schematically in front view an embodiment of a panel element according to the invention with a single insertion tab and FIG

13c FIG. 2: schematically, in front view, an embodiment of a panel element according to the invention with a folded-over single tab. FIG.

Description of the embodiments

1 schematically shows a perspective view of an embodiment of a profile arrangement according to the invention 10 with inserted cardboard tubes 12 , the tubular profiles. The cardboard tubes 12 are each with one end by a connecting element 20 connected with each other. The connecting element 20 is cube-shaped and therefore has six surfaces, hereinafter as lateral surfaces 21 denotes, on which in each case a receiving body, not shown here, is to be attached, the cardboard tubes 12 holds. Instead of a cube-shaped connecting element 20 It is also possible to choose another geometric figure, for example a tetrahedron or another polyhedron. Furthermore, only on some of the lateral surfaces 21 a receiving body be attached, if only there cardboard tubes 12 should be attached.

2 shows schematically in opposite 1 enlarged sectional view of an embodiment of a receiving body according to the invention 24 , designed as a hollow profile, with attached cardboard tube 12 that a wall 15 having. The receiving body 24 which has a square hollow profile, becomes with an excess in the diagonal relative to the inner diameter of the cardboard tube 12 made, so that when pushing a cardboard tube 12 an elastic deformation of both the cardboard tube 12 as well as the recording body 24 results. This elastic deformation leads to a pressure and thus increased friction between the inner circumferential surface 16 of the cardboard tube 12 and the edges of the receiving body 24 , This is the cardboard tube 12 on the receiving body 24 attached frictionally and secured against deduction in particular.

3 schematically shows a perspective view of an embodiment of a profile arrangement according to the invention 10 during assembly of cardboard tubes 12 that on the previously with the connecting element 20 assembled receiving body 24 be plugged. At the cardboard tube 12 are also the inner surface 16 after mounting on the corners or edges of the receiving body 24 clamps, and the outer surface area 17 shown.

4a shows schematically an embodiment of a blank according to the invention 23 for a cube-shaped connecting element 20 , like it 4b shows. The outer contour is cut out and the slots 22 are pre-punched. In this later, the receiving body can be used. Furthermore, preferably folding lines 29 prepared by grooves, scratches, perforations or the like, so that along the fold lines 29 the cube-shaped connecting element 20 erected and then assembled. Not shown are advantageous securing elements through which the erected connecting element 20 is assembled and secured in its cube shape. For this purpose, numerous possibilities are known from the prior art, such as adhesive tabs, insertion tabs or additional elements such as adhesive strips, which are intended to be applied after erecting the joined edges.

4b schematically shows a perspective view of an embodiment of a cube-shaped connecting element according to the invention 20 , This is from the blank 23 as he is in 4a has been shown, erected and put together. He has the slots 22 in the lateral surfaces 21 on.

5a shows schematically an embodiment of a blank according to the invention 25 for a receiving body 24 according to 5b , designed as a hollow profile. In addition to the pre-cut receiving body pockets 28 that later in the slots 22 (see 4a and 4b ) are to be plugged in, here are folding lines 29 prepared. The assembly of the blank 25 to the erected receiving body 24 then takes place as well as already 4a described.

5b schematically shows a perspective view of an embodiment of a receiving body according to the invention 24 , executed as a hollow profile, as it arises when the blank 25 out 5a is erected and put together. The receiving body pockets 28 then have a layer which is an insertion in the slots 22 (see 4b ).

6a schematically shows an embodiment of a first blank according to the invention 27 for another receiving body 26 , in this case executed as an entangled surface object, ie joined together from a plurality of flat, unfolded blanks 27 . 27 ' , Shown is the first cut 27 of a total of two required blanks 27 . 27 ' , This first cut 27 again has a receiving body pocket 28 which serves also in this case to assemble the receiving body with the connecting element. Furthermore, the blank has 27 a long slot 33 on, with the two complementary blanks 27 . 27 ' (see 6b ) can be joined together. For this they are at the long slots 33 nested, with the long slots 33 form a stop and limit the insertion path.

6b schematically shows an embodiment of a second blank according to the invention 27 ' for the receiving body 26 , executed as an interlaced surface object. The cut 27 ' is compatible and complementary to the blank 27 out 6a , He also has a long slot 33 on, whose function is already too 6a has been described.

6c schematically shows a perspective view of an embodiment of a receiving body according to the invention 26 , executed as an interlaced surface object, consisting of the two blanks 27 . 27 ' was joined together. The receiving body pocket 28 or the receiving body pockets 28 serve to the receiving body 26 with the connecting element 20 put together. Again, after clamping a clamping between the plugged tubular element, z. B. a cardboard tube, and the receiving body 26 , This is the width of the blanks 27 . 27 ' slightly larger than the diameter of the tubular profile, so that it also comes here to an elastic deformation and the resulting pressure with frictional engagement at the contact lines. Which excess is required, the skilled person will find out by experiments, which depends in particular on the elastic properties of the materials used. In the preferred embodiment, in which both the tubular element and the receiving body are made of cardboard, an excess of between 0.5 and 10% is assumed, depending on the thickness of the cardboard. This also applies to receiving body with a different polygonal cross-section.

6d schematically shows a perspective view of an embodiment of a receiving body according to the invention 26 ' as a variant of the receiving body 26 , The difference is in the receiving slots 34 , which serve to receive the tubular profile and clamp this inside and outside on the wall.

7a schematically shows a perspective, partially transparent representation of an embodiment of a connecting element according to the invention 30 . 30 ' , executed as an interlaced surface object, with inserted cardboard tubes 12 , Instead of cardboard tubes 12 Of course, other tubular elements come into consideration. The flat pieces 31 . 32 . 32 ' . 36 . 36 ' are joined together as described below, wherein in the illustration the division of the third flat piece 36 . 36 ' runs horizontally. In some of the receiving slots 34 are cardboard tubes 12 used.

7b schematically shows an embodiment of a first sheet 31 as a component of a connecting element according to the invention 30 , executed as an entangled surface object, ie assembled from several flat, unfolded blanks 31 . 32 , One of these blanks is the first flat piece 31 that a long slot 33 having, the joining with the second sheet 32 (see 7c ) serves. The flat pieces 31 . 32 are pushed into each other for assembly, so that they can be fixed substantially at right angles to each other. Furthermore, there are two short slits 35 provided, each offset by 90 ° to the long slot 33 are arranged and themselves, as well as the long slot 33 , to the edge of the first flat piece 31 open. This will allow you to over each of the short slots 35 one of the two parts of the third flat piece 36 . 36 ' (see 7d and 8c ).

The receiving slots 34 serve in the connecting element formed later 30 the inclusion of the tubular profiles. Here is the receiving slot 34 so measured that the wall 15 of the tubular element in the receiving slot 34 stuck. For this purpose, the receiving slot 34 an undersize in relation to the wall thickness of the tubular profile, so that it comes to a clamping and a frictional engagement. It is particularly advantageous in this case that the clamping not only on one, the inner circumferential surface 16 takes place, but at the Inner surface area 16 and the outer circumferential surface 17 at the same time. This makes the tubular profile even better and safer with the connecting element 30 connected.

7c schematically shows an embodiment of a second sheet 32 of the connecting element according to the invention 30 , The second flat piece 32 also has a long slot 33 on which it helps with the first flat piece 31 (see 7b ) is connectable. They are again recording slots 34 whose purpose has already been explained above.

7d schematically shows an embodiment of a third, two-part flat piece 36 a connecting element according to the invention 30 , Both parts have short slits 35 on, with which they are using the first flat piece 31 are connectable. This is preferably done after the first and the second sheet 31 . 32 were joined together. The third flat piece 36 can be added completely or in half if necessary, namely if in the direction in which the flat piece 31 . 32 has, tubular profiles to the connecting element 30 to be added.

7e shows schematically in detail a section of an embodiment of a flat piece 31 . 32 . 32 ' . 36 . 36 ' in particular, the receiving slot 34 is recognizable. This opens against the edge of the blank, wherein the opening is wedge-shaped to facilitate the insertion of the tubular profile during assembly.

8a schematically shows a further embodiment of a first sheet 31 a connecting element according to the invention 30 ' , executed as an interlaced surface object. The first flat piece 31 corresponds to that already too 7b has been described.

8b schematically shows a further embodiment of a second sheet 32 ' a connecting element according to the invention 30 ' , In contrast to the second flat piece 32 out 7c has the one shown here next to the long slot 33 and the receiving slots 34 still recesses 39 on. Their function is revealed by looking at the 8c , as the security noses shown there 37 through the recesses 39 can be passed. This takes place when connecting the first flat piece 31 with the two parts of the third flat piece 36 ' ,

8c schematically shows a further embodiment of a third, two-part flat piece 36 ' of the connecting element according to the invention 30 ' , In addition to the short slots 35 and the receiving slots 34 are safety noses 37 and, complementary to each opposite attachable locking lugs 37 , Security notches 38 intended. When mounting the two parts of the third flat piece 36 ' become safety noses 37 and security notches 38 nested and provide greater security against accidental loosening of the assembled connection. In addition, the safety noses increase 37 also the security of the connection with the second flat piece 32 ' because the safety noses 37 through the recesses 39 of the second flat piece 32 ' protrude. This has a connecting element 30 ' (see 7a ) increased strength after assembly of the sheets 31 . 32 ' . 36 ' on.

9 schematically shows a perspective view of an embodiment of a profile arrangement according to the invention 10 with flexible connection element 40 , The flexible connection element 40 allows a connection of the tubular profiles 12 in such a way that they can be tilted out of the plane or remain mobile. The tubular profiles 12 are about not visible in this representation receiving body with the flexible connecting element 40 connected.

10 schematically shows a perspective view of an embodiment of a flexible connecting element according to the invention 40 as it is in the profile arrangement 10 according to 9 is used. Here are the receiving body 24 over a hinge area 42 and over a connection area 43 , which at their outer edge the hinge areas 42 has, connected to each other. Each hinge area 42 forms a tilt axis 44 to which the respective receiving body 24 is tiltable.

11a shows schematically an embodiment of a blank according to the invention 41 for a flexible connecting element 40 , as the 10 and 11b show it. For each receiving body is a separate cut 25 provided with the centrally arranged connection surface 43 over the hinge area 42 connected is.

11b schematically shows a perspective view of an embodiment of a flexible connecting element according to the invention 40 , The connecting element 40 with the four receiving bodies 24 and the hinge areas 42 arises when the blank according to 11a is erected and put together. For joining, reference is made to the above-mentioned possibilities of the prior art.

12a schematically shows a perspective view of an embodiment of a connecting element according to the invention 20 with inserted panel element 50 with double pocket 54 (see. 12b ). The panel element 50 is used in particular in the construction of furniture or Wall elements, as they can be used, for example, in exhibition stand construction, the production of sealed areas. The panel element 50 consists of a blank of a sheet material, in the interests of uniformity of materials preferably of cardboard or cardboard. To the panel element 50 To be able to stretch over the intended area, the corner areas are specially designed to work with the connecting element 20 . 30 . 30 ' can be joined together.

In the illustrated embodiment, the corner region is considered a double tab 54 executed, its cutting with prepared fold lines 29 in 12b is shown. After folding over the double pockets 54 at the fold lines 29 , presented in the 12c and 12d in two views, the double-sided flap 54 in the slots 22 of the connecting element 20 be used.

13a schematically shows a perspective transparent representation of an embodiment of a connecting element according to the invention 30 . 30 ' with inserted panel element 52 with single flap 56 , Unlike the 12a to 12d Here is a corner design of the panel element 52 shown, in particular compatible with the connecting element 30 . 30 ' is. This is the connecting element 30 . 30 ' however with separate panel slots 58 Mistake. In this, the panel element 52 be used.

13b shows schematically in front view an embodiment of a panel element according to the invention 52 with single flap 56 with a fold line 29 , Will the simple tab 56 along the fold line 29 folded, results in a panel element 52 according to 13c , This shows schematically in front view an embodiment of a panel element according to the invention 52 with folded over single flap 56 ,

LIST OF REFERENCE NUMBERS

10

profile arrangement

12

tubular profile, cardboard tube

15

wall

16

Inner surface area

17

Outer casing surface

20

Connecting element dreidimens. Surface figure, cube-shaped. connecting member

21

lateral surface

22

slot

23

Blank connection element

24

Receiving body hollow profile

25

Cutting receiving body hollow profile

26, 26 '

Receiving body entangled surface object

27, 27 '

Cut receiving body entangled surface object

28

Receiving body insertion flap

29

fold lines

30, 30 '

Connecting element entangled surface object

31

first flat piece

32, 32 '

second flat piece

33

long slot

34

receiving slot

35

short slot

36, 36 '

third flat piece

37

securing lug

38

securing slot

39

recess

40

flexible connection element

41

Cutting flexible connecting element

42

hinge area

43

interface

44

tilt axis

50

Panel element with double insertion flap

52

Panel element with single-pocket flap

54

Double insertion flap

56

Simply insert strip

58

Paneelschlitz

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• CH 429317 A [0002]
• EP 0007065 A1 [0003]
• NL 1004046 C [0004]
• NL 1016054 C [0004]
• US 3648404 A [0004]
• US 3830011 A [0004]
• US 4551127 A [0004]
• DE 20221433 U1 [0005]
• DE 3910304 A1 [0006]
• DE 2651656 A1 [0007]
• DE 3943364 A1 [0008]
• DE 20106446 U1 [0009]
• WO 1999/013954 A1 [0010]
• EP 0164271 B1 [0010]
• US 4642063 A [0010]
• CN 101678241 B [0010]
• US 2012/0184174 A1 [0010]
• US 5049105 A [0010]
• US 4764143 A [0010]

Claims (17)

Connecting element for tubular profiles to the end-side connection with each other, characterized in that the connecting element ( 20 . 30 . 30 ' . 40 ) consists of a sheet material, made of one or more foldable and / or joinable blanks ( 23 . 25 . 27 . 27 ' . 41 ) and / or flat pieces ( 31 . 32 . 32 ' . 36 . 36 ' ). Connecting element according to claim 1, being provided as sheet materials paper, cardboard or cardboard. Connecting element according to claim 1 or 2, wherein as tubular profiles ( 12 ) reused cardboard tubes are provided. Connecting element according to one of the preceding claims, designed as a three-dimensional surface figure ( 20 ), the slots ( 22 ) in their lateral surfaces ( 21 ), in the receiving body ( 24 . 26 ) for receiving the tubular profiles ( 12 ) on its inner surface ( 16 ) alone or their inner surface ( 16 ) and its outer circumferential surface ( 17 ) are carried out together by means of receiving body tabs ( 28 ) can be used. Connecting element according to claim 4, wherein the three-dimensional surface figure ( 20 ) is polyhedron-shaped. Connecting element according to claim 4 or 5, wherein at least one of the receiving body ( 24 ), formed from an erect cut ( 25 ), a polygonal cross-section or the receiving body ( 26 ) as an entangled surface object consisting of at least two by means of long slots ( 33 ) nested flat pieces ( 27 . 27 ' ), is trained. Connecting element according to one of claims 1 to 3, designed as a flexible connecting element ( 40 ), wherein the receiving body ( 24 ) via a hinge area ( 42 ) in one piece with a connection surface ( 43 ) and each receiving body ( 24 ) opposite the interface ( 43 ) out of a plane and about a tilt axis ( 44 ), which is the hinge area ( 42 ) is tiltable. Connecting element according to one of claims 1 to 3, designed as a multi-dimensionally entangled surface object, which consists of at least two flat pieces ( 31 . 32 . 32 ' ), at the periphery receiving slots ( 34 ) are provided, in which a wall ( 15 ) of the tubular profile ( 12 ) is receivable. Connecting element according to claim 8, wherein a third flat piece ( 36 . 36 ' ) to which in the second flat piece ( 32 . 32 ' ) inserted first flat piece ( 31 ) is added. Connecting element according to claim 9, wherein the third flat piece ( 36 . 36 ' ) in two parts and by means of short slits ( 35 ) is slotted and from two sides on the first flat piece ( 31 ) in there introduced short slots ( 35 ) is inserted. Connecting element according to claim 10, wherein at least one securing nose ( 37 ) in the first and / or second part of the third flat piece ( 36 ' ) provided for the construction of the entangled surface object by at least one recess ( 39 ) in the second flat piece ( 32 ' ) is guided, and in at least one with the one safety nose ( 37 ) corresponding securing notch ( 38 ) in the other part of the third flat piece ( 36 ' ) is insertable. Connecting element according to one of claims 8 to 11, which consists of by means of long slots ( 33 ) nested flat pieces ( 31 . 32 . 32 ' . 36 . 36 ' ) or flat pieces separated along the long slots ( 31 . 32 . 32 ' ), which are joined together at the separating edges. Connecting element according to one of claims 8 to 12, wherein the flat pieces ( 31 . 32 . 32 ' . 36 . 36 ' ) are glued together by means of one or more adhesive seams. Blank made of a flat material, cut out, pre-punched and / or pre-drawn to form at least a part of a three-dimensional object, characterized in that the three-dimensional object is a connecting element ( 20 . 30 . 30 ' . 40 ) and / or a receiving body ( 24 . 26 ) according to one of claims 1 to 13. Panel element for a multi-dimensional profile arrangement comprising tubular profiles ( 12 ) and connecting elements ( 20 . 30 . 30 ' . 40 ) according to one of claims 1 to 13, wherein the tubular profiles ( 12 ) by means of at least one connecting element ( 20 . 30 . 30 ' . 40 ) are joined, characterized in that in at least one of the through the tubular profiles ( 12 ) framed surfaces the panel element ( 50 . 52 ) can be used. Panel element according to claim 15, wherein at least one of the panel elements ( 50 ) intended is that at least one corner of a double-sided flap ( 54 ) in the slots ( 22 ) of the connecting element ( 20 ) is insertable. Panel element according to claim 15, wherein at least one of the panel elements ( 52 ) provided at at least one corner via a single insertion tab ( 56 ) in the panel slot ( 58 ) of the connecting element ( 30 . 30 ' ) is insertable.

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