DE8622738U1 - Corner connectors for profile rails - Google Patents

Description

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R.20802
14.8.1986 St/Pi

ROBERT BOSCH GMBH, 7000 STUTTGART 1

-\ Eok connector for profile rails
State of the art

The invention is based on a corner connector for profile rails according to the preamble of claim 1. Such corner connectors, also called node elements, are used as connecting elements for frames made of profile rails. Screwed onto such rails at the front, they are able to connect several rails to one another without milling or using angle brackets that can be fastened in longitudinal grooves in the profile rails, whereby horizontal and vertical connections are possible. Known corner connectors consist of a profile node with a rectangular or square outer contour. The profile node is provided with T-shaped longitudinal grooves that open outwards and serve to accommodate the head of a screw, which can be screwed into a threaded hole formed in the front surface of the rail or a threaded sleeve attached there in order to fasten the rail. On one end of the profile node, there is also a slot for a screw, which enables the attachment of a vertical beam, for example, which serves as a stand. This means that up to five profile beams can be connected to one another using a profile node. Special screws and a special wrench are required for assembly. Before tightening the screws, the parts to be connected must be in

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There is also a risk _that the horizontal alignments will shift and/or twist with respect to the profile node under heavy loads, as the screws only create a friction-locked connection between the profile node and the rail.

Advantages of the invention

The corner connector according to the invention with the characterizing features of claim 1 has the advantage that the through-openings formed in the walls of the hollow body with the screws inserted therein determine the relative position of the hollow body and the profile rails, so that there is no need to adjust these parts by moving the hollow body along the end faces of the profile rails before tightening the screws. In addition, there is a positive and force-locking connection between the hollow body and the profile rails, which ensures that the profile rails cannot move relative to the hollow body under load. The size of the hollow body is expediently selected in such a way that it is flush with the outer contours of the profile rails. The corner connector according to the invention makes it possible to connect up to five profile rails to one another, the end faces of which each rest against a wall of the hollow body. The hollow body, which is open on one side, makes it easier to insert the screws and to tighten or loosen them, which can be done using standard tools.

The measures listed in the subclaims make it possible to develop advantageous further developments and improvements to the corner connector specified in claim 1. It is particularly advantageous that the walls of the hollow body are provided with pins that engage in a form-fitting manner in the front recesses of the profile rails. These pins facilitate and simplify assembly and also prevent the profile rails from turning relative to the hollow body under heavy loads.

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drawing

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An embodiment of the invention is shown in the drawing and explained in more detail in the following description. Figure 1 shows a corner connector with three profile rails in a perspective view, with the area of a profile rail covered by the corner connector being shown in solid lines for the sake of clarity, Figure 2 shows the corner connector according to Figure 1 in a cross section.

Description of the embodiment

The corner connector for profile rails 1 shown in the figures consists of a cuboid-shaped hollow body 2, which is preferably made from aluminum or an aluminum alloy using an injection molding process. In the example shown, the body 2 has a square cross-section with five walls 3 at right angles to one another. The hollow body 2 is open on one side. Each wall 3 is provided with an opening in the form of a round hole 4 for a screw 5 to pass through, by means of which the body 2 can be connected to a profile rail 1. The screw 5 has a hexagon head 6 and a threaded extension 7. To accommodate the threaded extension, a threaded hole 8 or a threaded sleeve extending in the longitudinal direction of the rail is made in the front face of each profile rail 1.

The profile rails 1 consist of a square hollow profile with a square outer contour and a centrally arranged threaded hole 8. The profiles are provided on each side with two outwardly open, T-shaped longitudinal grooves 9 into which fastening means such as hammer screws, expansion nuts, clamping claws and the like can be inserted. Furthermore, the longitudinal grooves 9 are suitable for accommodating edging profiles for partition walls, covers and panes.

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In addition to the T-shaped outer grooves 9, the profile rail has four inner grooves 10 with a circular cross-section. These grooves are used to fix the profile rails 1 in a predetermined rotational position on the body and to create a form-fitting connection between the parts. For this purpose, the walls 3 of the hollow body 2 are provided with pins 11 which engage in the inner grooves 10 of the rails 1. In the embodiment, the walls 3 of the body 2 are each assigned two pins 11 which are received in two inner grooves 10 which are arranged on opposite sides of the rails 1. The pins 11 have the additional effect of increasing the load-bearing capacity of the connection. The pins 11 are threaded pins which can be screwed from the outside into threaded holes 12 of the walls 3. The pins 11 can also be a molded-on component of the node.

To assemble the corner connection, the body 2 with a wall 3 is placed on the front face of a profile rail 1 in such a way that the previously screwed-in threaded pins come into positive engagement with two opposing internal grooves 10 of the rail 1. Then a screw 5 with the threaded extension 7 is inserted through the open hole of the hollow body 2 into the hole 5 in the wall 3 of the body 2 corresponding to the hole 8 of the rail 1, screwed into the threaded hole 8 of the rail 1 and tightened. The formed parts are thus connected to one another in their intended position.

The same procedure is followed when connecting the body 2 to other rails 1. It is not necessary to readjust the parts 1 and 2 to one another before tightening the screws 5, since their position is already predetermined by inserting the pins 11, designed as threaded pins, into the grooves 10.

In the exemplary embodiment, the corner connector is intended to connect a vertical profile 1, for example a stand profile, with two horizontal profiles that form a right angle

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and ran at the same height. The dimensions of the corner connector are chosen so that its outer surface is flush with the outer surfaces of the corner profiles. Corner connectors and profile rails have a square cross-section with centrally arranged screw receptacles. As an alternative to this, hollow profiles with a rectangular cross-section and several threaded holes can be used. In this case, the hollow body would also have a rectangular cross-section and several openings for fastening screws could be provided in its walls.

Claims (4)

no r R. 208Q2 14.8.1986 St/Pi ROESRT EOSCH GMBH, 7000 STUTTGART 1 Speech 1. Corner connector for profile rails, which have at least one threaded hole or threaded sleeve on the front side, extending in the longitudinal direction of the rail, for screws that can be inserted into the corner connector, by means of which the front surfaces of the profile rails are held to the outer surfaces of the corner connector, characterized in that the corner connector is designed as a cuboid-shaped hollow body (2) that is open on one side, the walls (3) of which are provided with through-openings (4) for the screws (5). 2. Corner connector according to claim 1, characterized in that the walls (3) of the hollow body (2) are provided with pins (11) which engage in a form-fitting manner in front-side recesses (TO) of the profile rails (1) » 3. Corner connector according to claim 2, characterized in that threaded pins which can be screwed into threaded holes (12) in the walls (3) of the hollow body (2) serve as pins (11) and engage in circular grooves (10) in the profile strips (1). 4. Corner connector according to one of the preceding claims, characterized in that the through-openings (4) for the screws (5) are designed as rounded ones. (?. ßckv&rbinaer according to one of the preceding claims, characterized in that the outer contour of the hollow body (2) is flush with the outer contour of the profile rails (1) attached to it. M I I IIII »suffered &igr;&igr;&igr;&igr; ti Il K 11 I I I I I I I Il It