DE8703311U1 - Fastening device for U-shaped crossbars - Google Patents

Description

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EUROPEAN PATENT ATTORNEYS *

DR^-ING* KLAUS DURM DIPL*-INGi FRANK DURM

D-7500 KARLSRUHE 21 B Sch 3432/86 FELIX-MOTTL-STRASSE 1 A

19, February 1987 TELEPHONE:(0721) 85 33 55

TELEXi 7 826 322 durm d TELEGRAM: DURMPATENT

Schroff Limited Liability Company, Straubenhardt

7541 Straubenhardt 1
15

industrial area

Fastening device for U-shaped crossbars

The innovation concerns a fastening device for U-shaped crossbars for dividing the door opening of the frame of an equipment cabinet for industrial electronics, whereby the frame is composed of four vertical pillars made of sheet steel, which are each connected at their ends by a horizontal frame consisting of four connecting pillars made of sheet steel, and the pillars and the connecting

spars the t9 one —2— supporting r U-Pro Knife edge same, 1

fil.

The innovation applies to equipment cabinets that are equipped with two or more doors arranged one above the other.

It is known that the door opening of the frame of an equipment cabinet can be divided using one or more crossbars with a U-shaped cross-section. However, attaching these crossbars to the two pillars of the frame is particularly difficult if special angle strips or other holding profiles are also attached to the pillars for installing slide rails or other devices. Up to now, a separate fastening device was required for each of these strips and each profile.

The aim of the innovation is to design a fastening device for U-shaped cross members of frame structures, with the help of which these can be fastened to bare pillars as well as to those that are provided with strips or profiles, without additional aids.

The task is solved by a fastening bracket of U-shaped cross-section with a U-back and two parallel U-legs that are perpendicular to the U-back, one of which is perpendicular to

a tab is attached to the outside, as well as three pairs of screw holes that pass through the two U-legs and the tab. With this mounting bracket, the cross beams can be screwed to the pillars without difficulty, regardless of the configuration.

It is advantageous if the U-leg carrying the tab is twice the length of the other U-leg. This measure ensures that the fastening bracket can be used universally.

It is practical if the tab has the same width as the U-leg that supports it. This has a positive effect on the stability of the proposed mounting bracket.

The mounting bracket can be a one-piece, multi-edged bent part. This makes the production of the mounting bracket considerably easier.

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l The fastening device is described in more detail below using the attached drawings. In

■i these drawings show

5 Fig. 1 the mounting bracket in iso

metric axonometry, on a slightly enlarged scale;

Fig. 2 the mounting bracket according to

Fig. 1 in side view, in

natural size;

Fig. 3 the attachment of one end

a cross member on a vertical pillar of the frame

part of an equipment cabinet, in isometric axonometry, scale 1:1;

2Q Fig. 4 another type of fastening

t of the cross beam on the pillar at

Presence of an angle profile, in a schematic plan, on a reduced scale.

The mounting bracket 1 shown in Figure 1 consists (see Figure 1) of a surface-protected, three-millimeter-thick steel sheet; it is a one-piece, multiple right-angled bent part, which is made of a

35

&Igr; rectangular cut.

The mounting bracket 1 has a U-shaped cross-section (see Figure 2) with a U-back 2, a short U-leg 3 and a long U-leg 4, which connect to the U-back 2. The two U-legs 3 and 4 are perpendicular to the U-back 2.

A tab 5 is attached at right angles to one of the long U-legs 4, which points outwards and is parallel to the U-back 2. This tab has the same width b as the long U-leg 4 to which it is attached.

The two U-legs 3 and 4 as well as the tab 5 each have pairs of screw holes 6,6·, 7,7" and 8,8'.

The U-leg 4 ^carrying the tab 5 has twice the length 1 of the other U-leg 3.

Figure 3 and Figure 4 explain the use of the described mounting bracket 1.

The fastening bracket 1 to which the cross beam is attached is screwed onto a pillar 9 - see Figure 1. The vertical pillar 9 is part of a structure made up of four such pillars.

set, prismatic frame, a Ge- ti

ment cabinet of the industrial electronics. The pillars 9 made of sheet steel have a U-profile

-δ-, which has a hole edge 11 on the one hand and a knife edge 12 on the other. The fastening angle 1 is screwed to the hole edge 11 with its tab 5 using two hexagon socket screws 13 which pass through the pair of screw holes 8,8. The four pillars 9 are each connected to one another at their ends by a horizontal frame consisting of four connecting beams (not shown).

The cross member 10 is attached to the short U-leg 3 of the mounting bracket 1 using two additional hexagon socket screws 14 that pass through the screw holes 6, 6. This cross member 10 divides the door opening of the frame, formed by two pillars 9 and two connecting beams, into an upper and a lower door opening, which are closed by two doors.

^The cross member 10 has a U-shaped profile, the two legs 15 and 16 of which serve as knife edges and have the same height as the knife edge 12 of the pillar 9. A profiled rubber seal (not shown) is located between the ends of the cross member 10 and the knife edge 12 of the pillar 9. The seals of the two doors are located opposite the knife edges*

Another method of fastening a cross beam 10 to a pillar is shown in the plan view in Figure 4. For the purpose of expansion with sliding rails,

Angle profiles made of sheet steel are arranged on the pillars 9 of the frame and are screwed to the hole edge of the pillar 9. The fastening angle 1 with its long U-leg 4 is screwed to an angle edge 18 of this angle profile 17, while the cross member 10 is attached to the short U-leg 3.

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-&Igr;&Ogr;&Igr; Sch 3432/86

19 February 1987

Summary of the reference numbers used

10

20 25 30 35

1 mounting brackets 2 U-back 3 U-leg (short) 4 U-leg (long) 5 Tab b Width (of 5) 6.6· Screw holes 7.7· Screw holes 8.8' Screw holes 1 Length (of 4) 9 pier 10 Crossbar 11 Hole edge 12 Knife edge 13 Hexagon socket screws 14 Hexagon socket screws 15 Schenkex (out of 10) 16 Thighs (of 10) 17 Angle profile 18 Angle edge

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Claims (4)

&igr; at· * ■ &igr; 111 ■ 191 Il 1 »III III Sch 3432/86 19 February 1987 .Protection claims 1. Fastening device for U-shaped crossbars for dividing the door opening of the frame of an equipment cabinet for industrial electronics, the frame being composed of four vertical pillars made of sheet steel, each of which is connected to one another at its end by a horizontal frame consisting of four connecting pillars made of sheet steel, and the pillars and the connecting pillars having the same U-profile carrying a knife edge, characterized by a fastening bracket (1) of U-shaped cross-section with a U-back (2) and two parallel U-legs (3 and 4) standing perpendicular to the U-back (2), on one of which (4) a tab (5) is attached pointing outwards at right angles, and with three pairs of screw holes (6,6·, 7,7' and 8,8') which pass through the two U-legs (3 and 4) and the tab (5). 2. Fastening device according to claim 1, characterized in that the U-leg (4) carrying the tab (5) has twice the length (1) of the other U-leg (3). tt* &igr; « · I ■ I I t 1 I -9- 1 3. Fastening device according to one of claims 1 or 2, characterized in that the tab (5) has the same width (b) ^ff as the U-leg (4) supporting it has. 4. Fastening device according to one of claims 1 to 3, characterized in that the fastening angle (1) is a one-piece, multiply bent part, 10 20 ²⁵ 30 35