EP2916687B1 - Corner connector - Google Patents

Description

Background of the invention

The invention relates to a corner connector, comprising a first cube-shaped base body having on a first cube surface a closed surface and two adjoining second and third closed surfaces at right angles to each other and to the first cube surface, while the cube surface is opposite the second and third surfaces in each case an approach with prismatic outer cross-section for attaching a pipe profile end adapted to the outer cross-section of the neck inner cross-section, wherein the approach over its alignment line has resiliently projecting holding elements which protrude into a breakthrough formed near the pipe profile end and to the create a breakthrough edge to hold the tube end axially in place against the cube face.

State of the art

Such a corner connector is from the FR 2 674 581 A1 or from the DE 91 05 664 U1 essentially known.

However, a disadvantage is the multi-part construction, which is complicated and requires screws.

Object of the invention

The object of the invention is to provide a corner connector which does not have these disadvantages and which can be arranged in a frame, in particular for the simplified construction of a sheet metal cabinet or sheet metal housing.

Solutions of the task

The problem is solved by the holding element according to the WO 2005/36083209 . Fig. 30A to use and to arrange a displaceable in a transversely to the tube profile axis channel slidable carriage, wherein the one end of the carriage protrudes in working position due to the spring tension from the channel with two inclined surfaces, wherein the one inclined surface with the thrust direction of the carriage a first , larger angle forms as inlet surface and the second inclined surface corresponding to a smaller angle forms as a holding surface.

According to one embodiment, the channel for the carriage through the cross section of the approach passes through, as well as in the WO document 2005/36083209 a continuous opening for the carriage is present.

Particularly favorable is a development in which the spring force is formed by a spiral spring, which is arranged in an opening of the carriage and has a thickness of the carriage superior diameter. As the WO document also shows, reference numeral 3526, the channel is drilled in the region of the spring to support the spring by the shoulder formed by the hole end.

The inner end of the bore is reduced in diameter according to yet another embodiment to clamp the supported end of the spring and thus to secure the spring against falling out.

According to another embodiment, in the region of the holding element or Snapelements the cross-section of the neck has jumped back to such a degree that corresponds to the axial extent of the inclined surfaces, wherein the pipe end has a corresponding thickening in cross section.

According to yet another development, a cube surface of the main body may be provided with an axial bore threaded to connect a further base body to the first base body by means of a screw, or to an existing frame, such as the base frame or roof frame of a rack or cabinet or housing.

The corner joint can be loosened again by means of a plug which can be received in the opening of the pipe profile end and has such dimensions that the reaching-in part can push the slide out of the opening and detach the pipe profile piece from the socket.

The cube-shaped base body and the approaches can be used to save material hollow body, possibly with thickening and stiffening struts inside the body.

The corner connector can also be designed such that the lugs are held by means of two holding elements, wherein the holding elements are arranged obliquely opposite one another, wherein the holding elements are in opposite directions.

The invention also includes or can be used in a frame, in particular for a sheet metal cabinet or sheet metal housing, with a base formed as a frame and / or designed as a frame roof, and / or designed as a frame door, rear wall or side wall, wherein the Frame is rectangular and carries at its four corners recordings in which vertical corner profiles can be received by plugging and are held by corner connectors according to one of claims 1 to 10.

According to one embodiment, the base or roof frame is a large, deep-drawn sheet metal part, or it is made of individual, z. B. welded together four parts frame parts, to which frame the four shots are screwed.

According to another embodiment, the frame is characterized in that the four receptacles are formed with the carriage-shaped support members as flanges, which are arranged rotated by 90 degrees to each other and which are connected by screws with the four frame sections and connect them like a bridge. In this case, the frame portion may consist of a folded profile section into which the flanges are fitting inserted.

According to another embodiment, the frame sections after mounting a Dachplatten- or bottom plate or door, rear wall or side plate clamped record.

The flange parts may each have a central threaded bore into which a cap screw, eyelet or an adjustable foot can be screwed, for fastening the receptacle to the frame.

According to yet another embodiment of the frame, the receptacles of the frame each have a central threaded bore into which a cap screw, eye or adjustable foot can be screwed, for fastening the receptacle to the corner connector.

Brief description of the drawings

The invention will be explained in more detail with reference to exemplary embodiments, which are illustrated in the drawings.

Fig. 1

eine auseinandergezogene Darstellung eines erfindungsgemäß aufgebauten Eckverbinders;

Fig. 2

den erfindungsgemäßen Eckverbinder in einer perspektivischen auseinandergezogenen Ansicht, zusammen mit zu verbindenden Rohrprofilstücken;

Fig. 3A und 3B

Details der Halteelemente und des Steckers zu deren Lösung;

Fig. 4

die Lage kurz vor der Montage der Rohrprofilstücke, dargestellt als weitere Ausführungsform des Eckverbinders mit einer Abdeckplatte für den Grundkörper;

Fig. 5

die Anordnung der Fig. 4, jedoch aus einem anderen perspektivischen Winkel betrachtet;

Fig. 6

die Anordnung der Fig. 4, jedoch perspektivisch aus einem noch anderen Winkel betrachtet;

Fig. 7

den Eckverbinder nach der Erfindung, jedoch für den Anschluss von drei Rohrprofilstücken;

Fig. 8

eine vereinfachte Ausführungsform des Dach- oder Basisrahmens oder eines Tür-, Rückwand- oder Seitenwandrahmens aus miteinander verschweißten Profilstücken zum Aufbau eines Rahmengestells und

Fig. 9

eine vereinfachte Ausführungsform des Dach- oder Basisrahmens oder einer Tür-, Rückwand- oder Seitenwandrahmens aus miteinander mittels Brücken bildenden Flanschen verbundenen Profilstücken zum Aufbau eines Rahmengestells mit vier profilierten Streben.

It shows:

Fig. 1

an exploded view of a corner connector constructed according to the invention;

Fig. 2

the corner connector according to the invention in a perspective exploded view, together with pipe profile pieces to be joined;

FIGS. 3A and 3B

Details of the holding elements and the plug for their solution;

Fig. 4

the situation shortly before the assembly of the pipe profile pieces, shown as a further embodiment of the corner connector with a cover plate for the main body;

Fig. 5

the arrangement of Fig. 4 but viewed from another perspective angle;

Fig. 6

the arrangement of Fig. 4 but viewed in perspective from yet another angle;

Fig. 7

the corner connector according to the invention, but for the connection of three pipe profile pieces;

Fig. 8

a simplified embodiment of the roof or base frame or a door, rear wall or side wall frame of welded together profile pieces to build a frame and

Fig. 9

a simplified embodiment of the roof or base frame or a door, rear wall or side wall frame of interconnected by means of bridges flanges profile pieces to build a frame with four profiled struts.

Best ways of carrying out the invention

In Fig. 1 a corner connector 10 according to the invention can be seen, comprising a cube-shaped base body 12 having on a first cube surface 14 a closed surface and two adjacent, mutually and the first cube surface perpendicularly extending second and third closed surfaces 16, 18, while of the second and third cube surface 16, 18 opposite cube surface 20, 22 each have a projection 24, 26 each with a prismatic, in the profile of a substantially rectangular outer cross-section for attaching a tubular profile end 28, 30, see Fig. 2 wherein the tube profile end has an inner cross section or inner profile 32 adapted to the outer cross section of the projection 24, 26, the projection 24 being resilient over the alignment line 34 projecting holding elements 36 each projecting into a breakthrough 38 formed near the tubular profile end 28 and bear against the breakthrough edge 40, whereby the tube profile end 28 is axially held on the projection 24 in position, wherein the tube profile end is axially supported on the cube surface.

The holding element 36, see Fig. 3A , Represents a arranged in a transverse to the tube profile axis 42 channel 44 displaceable against spring force slide, the one end 48 of the carriage 36 in working position due to the spring tension of the spring 46 from the channel 44 with two inclined surfaces 50, 52 resiliently protrudes, wherein the an inclined surface 50 with the thrust direction 58 of the carriage 36 forms a first larger angle 54 as an inlet surface and the second inclined surface 52 corresponding to a smaller angle 56 between the inclined surface 52 and the thrust direction 58 forms the support surface 52, wherein the second inclined surface 52 with the first inclined surface forms approximately a right angle.

Thus, if the tube piece 28 is displaced over the projection 24 in the direction of the tube axis 42, first the edge 86 of the diameter 38 reaches the second inclined surface 52 (inlet surface) and pushes the slide 36 into the channel 44 and remains in this position, Fig. 3B until the edge 88 is reached, which then slips along the inclined surface (holding surface), wherein the carriage 36 slides outward again until the tube profile piece 28 rests with the edge 86 on the fourth surface 20 of the base body 12. It is favorable in terms of production, when the channel 44 extends through the cross section of the neck 24, as in Fig. 3A recognizes that facilitates the production of the approach by injection molding and the slide can then be easily brought out of the channel 44, if desired.

The spring force 46, the slide 36 in the in Fig. 3A shown position, wherein the steepness of the inclined surface 50, the edge 40 is under tensile load on the tubular profile piece in the direction of arrow 42 is not able to push the holding member 36 back into the channel, this because of the frictional forces that cause a Blockade according to Fig. 3A occurs. If, however, a pipe section 28 with the Breakthrough 38 on the projection 24 along the axis pushed against the arrow 42 pushes the edge 88 on the inclined surface 52 which is sufficiently flat so that no blocking forces occur, but rather the edge portion 86, the support member 36 can push back so as to fall Let holding element happen until the opening 38 is reached.

The carriage 36 has a rectangular opening 92, in which the spring 46 can be inserted laterally, wherein a protruding into the opening 92 approach 94 prevents falling out of the spring 46 during assembly.

As can be seen from the figures, the cross section of the channel 44 and the cross section of the carriage 36 guided therein have the basic shape of a rectangle. In the area where the spring comes to lie, however, the area of the spring is drilled out, see for example the right side of the projection 26 in FIG Fig. 1 to support the spring through the shoulder formed by the bore end 60, as shown in FIG Fig. 3B It can be seen where the carriage 36 is inserted against the force of the spring 46 by a plug 62 or, in which the plug 62 was inserted into the opening 38 and pushed in the direction of the arrow 58. Since the channel 44 is narrower than the width of the diameter of the spring 36, when drilling for the spring two opposing bottom surfaces, which is now broken by the channel of rectangular cross section and forms the guide for the carriage 36.

In Fig. 3B It can be seen that after the insertion of the retaining element 36, the carriage 36 can slip out of the channel 44 again. It is therefore intended to reduce the bore at the end in diameter, so that the spring with their, according to Fig. 3B , clamped lower end. The rectangular channel 44 cut by the bore 60 is in Fig. 3B to recognize.

When in the Fig. 3B illustrated position of the plug 62, the pipe section 28 can be deducted from the projection 24 in the direction of the arrow 64.

The main body 12 can according to Fig. 1 on its sixth surface 66 a bore 68th having an axial thread to attach a further projection 70 when it has an axial bore 74 to screw by means of a screw 72 the lug 70 on the base body 12, for example, in addition to, for example, two horizontal struts 28, 30 still mount a vertical strut 90, for example to be able to.

As the figures show, the base body 12 as the lugs 24, 26, 70 is not solid, but as a hollow body with thickening for example horizontal struts 76, 78 provided. Also, the pipe section 28 may have a stiffener 76, which is preferably in the region with the opening 38. This increases the stability. The projection 24 has at the corresponding point a recess 82, which has the advantage that the inclined surfaces 52, 50 extend far into the cavity 38 without that they reach the surface of the pipe section 28 and interfere. It is advantageous if the lugs 24, 26, 70 each have two holding elements 36 which are arranged for reasons of symmetry with greater strength to each other a maximum distance because of the larger lever arm and also work in opposite directions, such as Fig. 1 makes it clear where the approach 24 has fasteners 36, 136.

Instead of a projection 70 can be screwed with a screw 172 and a cover plate 84 on the sixth side of the body 12, see Fig. 5 , This arrangement is preferable if no third vertical tube profile piece is needed.

Fig. 8 shows a simplified embodiment of the roof or base frame made of welded together profile pieces 110, wherein the welded frame, here to form a cabinet roof, is provided at its four corners with lugs or receptacles 170, on the perpendicular Eckprofile 190 attachable and by means of slide-shaped holding elements 136 are held in position, which retract into the openings 138 near the profile ends. The recordings are held by means of cap screws 172, which is guided through a round hole 111 in the frame and screwed into a threaded bore 168 in the receptacle 170. To prevent rotation two lugs 98 are projecting on the support surface 113 of the receptacle 170, which penetrate after mounting in bores 115 in the frame 110 and so form a rotation lock.

Fig. 9 shows another embodiment of a frame 210, which consists of four mutually perpendicular sections 117, 119, 121, 123, which are interconnected by flanges 125 having on the bottom receptacles 270 for carriage-shaped holding elements 236, wherein the flanges by means of screws 127th are bolted to the ends of the sections 117, 119, 121 and 123, for which purpose the sections with through-round holes 129 and the flanges can be provided with threaded holes 131.

The receptacles 270 may also have threaded holes 68 for screwing in a lifting eye 135.

Turning the whole thing around, from the roof frame 210 is a base frame in which instead of the lifting eyelets adjustable feet can be screwed.

To increase the stability of the frame 210, the frame sections may consist of folded profile sections 117, 119, 121, 123, into which the flanges 125 are fittingly insertable.

For the same reason, it is advantageous if the frame sections can accommodate a roof or base plate after mounting.

In the embodiments of the Fig. 8 and 9 It may not just be a designed as a frame floor or roof of a cabinet or housing, but act just as well to a trained as a frame side wall, rear wall or door.

A consisting of such frames and parts cabinet or housing can be much narrower, in particular much flatter pack than conventional cabinets and housing and thus much easier and cheaper store and ship, the structure is very simple and without special tools is possible, so that the end customer Assembly can be done by yourself.

Commercial evaluation

The invention can be evaluated commercially in control cabinet construction.

LIST OF REFERENCE NUMBERS

10, 110

Corner connector, profile piece

12

body

14

first closed area

16

second closed area

18

third closed area

20

fourth area

22

fifth surface of the cube

24

approach

26

approach

28

Pipe profile, corner profile

30

Pipe profile, corner profile

32

Internal cross-section

34

alignment

36

Retaining element, slide

38

breakthrough

40

Breakthrough edge

42

Pipe axis, arrow

44

channel

46

feather

48

shuttle end

50

Inclined surface, holding surface

52

Sloping surface, inlet surface

54

larger angle

56

smaller angle

58

arrow

60

cut hole

62

Tool

64

arrow

66

sixth area of the cube

68, 168

Bore with thread

70, 170, 270

Bolt-on approach, recording

72, 172

head screw

74

axial bore

76

stiffening

78

thickening

80

thickening

82

return

84

plate

86

edge

88

edge

90, 190

vertical struts

92

Rectangular opening

94

approach

96

Diameter, spring

98

nose

110

frame

111

drilling

113

bearing surface

115

drilling

117

sections

119

sections

121

sections

123

flange

125

screw

127

screw

129

drilling

131

threaded hole

135

eyelet

Claims (16)

1. A corner connector (10), comprising a cubical base body (12) which has, at a first cube face (14), a closed face and, at two connecting extending at right angles to one another and to the first cube face (14), second (16) and a third closed face (18), while there emerges from each of the cube faces opposite the second and third faces a projection with a prismatic external cross-section for mounting a pipe end by an internal cross-section (32) which fits the external cross-section of the projection, wherein the projection has retaining elements (36) which resiliently project over its alignment (34) and which protrude into an opening (38) formed by the pipe end and which rest on one edge (40) of the opening in order to retain the pipe end (28, 30) in position resting axially on the wall surface (20, 21), characterised in that the retaining element (36) a slide (48) displaceable counter to spring force (46) in a channel (44) arranged transverse to the pipe axis (42) in working position due to the spring tension protrudes out of the channel with two angular faces, that one angular face with the thrust direction of the slide (48) forms a first larger angle (54) as a run-in face (52) and the second angular face correspondingly forms a smaller angle (56) as a retaining face (50).
2. The corner connector according to Claim 1, characterised in that the channel (44) reaches through the cross-section of the projection (26).
3. The corner connector according to Claim 2, characterised in that the spring force (46) is formed by a spiral spring (46) which is arranged in an opening (92) of the slide (36) and which has a diameter (84) which surpasses the thickness of the slide (36).
4. The corner connector according to Claim 3, characterised in that the slide is bored out in the region of the spring (60) in order to support the spring (60) by the shoulder formed by the end of the bore.
5. The corner connector according to Claim 4, characterised in that the spring (60) is clamped at the inner end of the bore by the reduction (84) in diameter of the bore and is consequently secured against falling out.
6. The corner connector according to any one of claims 1 to 5, characterised in that, in the region of the retaining element (36), the cross-section of the projection rebounds_to an extent (82) such that the angular faces (50, 52) are exposed, and such that the pipe cross-section has a corresponding thickening (80).
7. The corner connector according to any one of claims 1 to 6, characterised in that a cube face (66) of the base body (12) is equipped with an axial bore (68) having a thread in order to connect a further projection (70) to the base body (12).
8. The corner connector according to any one of claims 1 to 7, characterised in that, by means of a plug (62), the part of the slide (36) reaching into the opening (38) of the pipe end can be slid back and the pipe profile part (28) can be released from the projection (24).
9. The corner connector according to any one of claims 1 to 8, characterised in that the cube (12) and/or projections (24, 26) are hollow bodies, if necessary with thickenings and reinforcement braces (76, 78).
10. The corner connector according to any one of claims 1 to 9, characterised in that the projection (24) has two retaining elements (36, 136) which move in opposite directions and which are situated diagonally opposite one another.
11. A rack, in particular for a metal cabinet or metal housing, having a base configured as a frame (110) and/or a roof configured as a frame (110), characterised in that the frame (110) consists of four corner connectors (10, 110, 210) according to any one of claims 1 to 10, which bears projections (170) or receptacles at its four corners, onto which projections (170) or receptacles the perpendicular corner profiles (190) can be mounted.
12. The rack according to Claim 11, characterised in that the frame is a large, deep-drawn sheet metal part, or is welded together from individual parts, e.g. the four frame parts or sections (110), onto which frame the four receptacles (170) are screwed.
13. The rack according to Claim 11, characterised in that the four receptacles (270) for the retaining elements are flanges (125) which are situated at 90 degrees to one another and which are connected to the four frame sections (117, 110, 121, 123) by means of screws (127) and connect them together.
14. The rack according to Claim 13, characterised the frame sections (117, 119, 121, 123) consist of edged profile sections into which the flanges (125) can be fittingly slid.
15. The rack according to Claim 14, characterised in that the frame sections (117, 119, 121, 123), after assembly, can clampingly receive a roof panel or floor panel.
16. The rack according to any one of Claims 13 to 15, characterised in that the receptacles are flange parts which each have a central threaded bore (68) into which a headed screw, lifting loop (135) or adjustable feet can be screwed.

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