FI121760B - Screw connection for attaching a structural part to a cell panel - Google Patents

Description

Screw connection for fixing the component to the cell plate

The thin plate honeycomb panel is a lightweight and rigid wall construction material, for example for the construction of electronics cabinets.

5

Since the thin plate easily bends even with a smaller force, it is a problem to attach the structural members to the wall formed by the cell plate. As an example of known joints of device cabinet components, the following may be mentioned.

EP 1890362 discloses the connection of cabinet frame profiles with screws inserted into the grooves of the profiles. Further, EP 0123988 discloses the attachment of a sheet to a peripheral structure by means of a screw through which the sheet is pierced to connect the pieces with a screw. US 5082405 discloses a device for incorporation into a honeycomb structure by means of which devices 15 are connected to the structure in question. From the patent application DE 3612975A1 it is known to fasten the waterproof housing cover with screws to the counter threads in the counterpart.

It is an object of the invention to solve this problem and to provide a screw connection for transferring the clamping force to an advantageous position on the cell plate.

This object is achieved on the basis of the features set forth in the appended claim 1. Preferred embodiments of the invention are disclosed in the dependent claims.

O -ΜΓ <m 25 i o Although the thin plates used in the structure of the honeycomb plate are easily bent by the force of a small keel, the solution according to the invention can divide the force by the arc | with bridges in the form of bridges over a wider area, which results in very high g durability. The two screw connections according to the invention took a test g 30 of effort in the thin plate construction, but the screws were broken with a load of 1000 kg. With four screws, the connection lasted over 1200 kg.

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A particular embodiment of the invention is the connection of the ceiling of the electronics cabinet to the wall so that the cabinet lifting loops can be used to lift the cabinets which, when filled with electronic equipment, are very heavy.

The invention will now be illustrated by reference to the accompanying drawings, in which:

Fig. 1 is a sectional view of a screw connection according to the invention and the application of the connection to the roof 6,7 of the cell wall 1 and 10 of the electronics cabinet; Fig. 2 shows the same joint as seen from one side of the wall plate 5; and Figure 3 shows the same joint in a perpendicular section of the wall plate 5.

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In the exemplary embodiment shown, the enclosure wall 1 of the device cabinet consists of a honeycomb plate 1 having two surface plates 5 and a core plate (not shown) having non-planar formations which keep the surface plates 5 spaced apart. A plurality of successive fastening arches 4 spaced 20 apart from each other are provided or secured to the second surface panel 5. Alternatively, separate arcs 4 may be fastened at their ends, e.g.

c3 25 In the case shown, the fastening arches 4 are five in a row. Preferably, there are at least three or four of these in order to distribute the force sufficiently over a long distance to the plate 5.

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g The screw fixing screw 2 is located between the mounting arms 4 and the plate 5 and σ> g 30 threads onto the fixing screw 4 and the plate 5. The screw 2 passes through the roof 6,7 of the cabinet o ^ and firmly secures the roof to the top of the cell plate wall 1. Within the edge profile of the roof panel 7 is a support beam or support panel 6 through which the fastening screw 2 passes. The head of the mounting screw 2 and the recess 3 of the roof plate 7 below it rest on the support beam or support plate 6. The cabinet lifting hooks can then be attached to the support beam or support plate 6. The profile shapes of both the top If the mounting brackets 4 are made on the surface plate 5 which forms the inner wall of the cabinet, the mounting brackets 4 will be invisible. The width of the mounting arms 4 in the direction of the mounting screw 2 may be smaller than the distance of the mounting arms 4, whereby the force is advantageously distributed over a longer distance.

It will be appreciated that the embodiments and applications of the invention may vary in many ways within the scope of the following claims.

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Claims (7)

Screw connection for attaching a structural member (6,7) to a cell plate (1) having at least two plates (5), characterized in that a plurality of successively spaced securing arcs (5) are made or attached to the plate (5) of the cell plate (1). 4) and the screw connection (2) for the screw connection is located between the mounting brackets (4) and the plate (5) and is threaded to engage the mounting (4) and the plate (5). Screw connection according to Claim 1, characterized in that the fixing arches (4) are arcuate bridge-shaped extrudings of sheet material. Screw connection according to claim 1 or 2, characterized in that there are at least three, preferably at least four, successive fastening arches (4). 15 Screw connection according to one of Claims 1 to 3, characterized in that the cell plate (1) is a wall of the electronics cabinet and the component (6,7) to be attached to it is a ceiling of the cabinet provided with lifting loops for lifting the cabinet. 20 Screw connection according to one of Claims 1 to 4, characterized in that the width of the clamps (4) in the longitudinal direction of the clamping screw (2) is smaller than the distance of the clamps (4). c3 25 A screw connection according to any one of claims 1 to 5 for attaching a structural member (6,7) o to a cell plate (1) having two surface plates (5) and a core plate having non-planar formations therebetween which hold | spacer plates (5) spaced from one another, characterized in that the fastening curves (4) g are made on the other surface plate (5). σ> m 30 o Screw connection according to claims 4 and 6, characterized in that the surface plate (5) provided with the mounting arches (4) forms the inner wall of the device cabinet.