DE3326398A1 - Device for holding mounting racks for electronic assemblies in telescopic rails which can be moved out of cabinet frames - Google Patents

Abstract

In a device for holding mounting racks (3) moulded parts (5) are mounted on the rearward ends of parts of commercially available telescopic rail pairs which can be pulled out, which moulded parts in each case have a first bearing point (6) for in each case one of two bearing journals (8) which are fitted coaxially on the sides on the mounting rack (3), and in each case a second bearing point (7), which is located in front of the first bearing point (6) in the pulling-out direction. When the mounting rack is pulled out and lifted up from its normal position, the bearing journals (8) slide from the first into the second bearing points in which the mounting rack can be pivoted into a vertical position in which it is possible to work on the rear-wall wiring of the assemblies on the underneath of the mounting rack (3). The moulded parts (5) can be provided with bolts (12), which can pivot, for locking the extended telescopic rails. The device is used for simplifying testing and switching tasks on assembly connections during repairs, modifications and fitment of new items. <IMAGE>

Description

Device for holding subracks electronic

shear assemblies in telescopic rails that can be pulled out of cabinet racks The invention relates to a device for holding subracks electronic assemblies in telescopic rails that can be pulled out of cabinet racks.

It is common to have frame-like subracks that hold a variety of contained therein inserted electronic assemblies, in cabinet racks that consist of profile frame scaffolding clad with cover plates.

The subracks are in slide-in units that can be pulled out on telescopic rails hooked in or form such.

In order to be able to carry out test and maintenance work on the assemblies or or re-equipping easily to the connection level located on the underside of the slide-in unit to get to the rear connections of the assemblies, it is known at withdrawn slot the rack by one located on its rear Pivot the axis upwards, so that the backplane wiring of the modules of is freely accessible at the front, see e.g. B. DE-OS 22 09 858; U.S. Patents 25 56 450 and 28 23 973.

However, the known designs require a relatively complex one Manufacturing technology or special telescopic rails.

For economic reasons, the task is therefore to create a To create an easy-to-manufacture device of the type mentioned, which is described in Connection with commercial usual, mounted in cabinet racks Telescopic rails allows an upwardly pivotable holder of the subrack.

One solution to the problem is given by the teaching of claim 1.

The molded parts can easily be attached to the rear ends of the pull-out Slide on or plug in parts of standard telescopic rails, it's just there to attach a hole in which the locking device of the molded part engages and this determines.

A preferred embodiment has the features of claim 4 on. It can be made in one piece from elastic plastic and fits as a result their execution symmetrical to the longitudinal center plane on both sides of a pair of telescopic rails.

Another embodiment of the device according to the invention provides a lock that locks the telescopic rails in the extended position, so that you can work with and on the assembled subrack.

To explain the invention, FIGS. 1 to 3 show exemplary embodiments shown and described below.

FIG. 1 shows one with the aid of the molded parts in telescopic rails a rack mounted subrack; Figure 2 shows a preferred embodiment a molded part; Figure 3 is a building game for a lock.

Figure 1 shows a schematic representation of the overall arrangement of a a series of racks with cabinet frames containing electronic assemblies 1.

The electronic assemblies in the form of flat modules or Assembled circuit boards are summarized in frame-like subracks 3, which in turn, suspended in telescopic rails 2, form the slots.

The telescopic rails 2 used in pairs usually exist from a fixedly mounted part 4 in the cabinet frame and one or more in these sliding, moving parts 4 ', 4 ".

In FIG. 1, one of the subracks 3 is in its telescopic rail holder fully undressed.

You can see a on a rear end of the pull-out part 4 '' the telescopic rail 2 attached molded part 5, which with the telescopic rail force- and / or is positively connected, and a first bearing point 6 and one in the extension direction in front of this lying second bearing 7 for one of two on the side of the rack Has 3 attached coaxial bearing journals 8.

At its front end, the rack 3 is by means of a latch 9 connected to the movable part 4 ′ of the telescopic rail 2.

The front panels of the assemblies contain the setting and operating elements lie in the upper horizontal plane a of the rack 3, its modules with front connectors 10 connected to the rest of the circuit via movable cables 11 are.

One lying in the lower horizontal plane b of the rack 3 Backplane wiring connects the subassemblies combined in subrack 3 together.

To make the backplane wiring more accessible for testing or other purposes To make, the rack 3 can be from the - fully drawn - normal position Swivel upwards into the position shown in dashed lines.

For this purpose, after the latching device 9 has been released, the subrack 3 raised and pulled forward until the trunnions 8 in the second bearing points 7 of the molded parts 5 enter the pair of telescopic rails.

The distance between the first bearing point 6 and the second bearing point 7 can advantageously be chosen so that the pivot angle from the normal position is greater 90 °, so that the rack 3 is with its front plane on the housing the cabinet frame can support and a further locking device is unnecessary.

During this pivoting process and when working on the pivoted one In the subrack, the telescopic rail must be locked in the fully extended position.

A pivotable bolt 12 attached to the molded part 5 is used for this purpose, whose axially parallel bolt edge is in the working position against a fixed shoulder 13 is supported in the front plane of the cabinet frame 1, here against the front edge of the fixed part 4 of the telescopic rail 2.

After completing the work on the underside of the subrack 3 this is swiveled back, by slightly lifting the bearing pin 8 brought from the second bearing points 7 over the first bearing points 6, the lateral Profiles 14 on the rack lie on the telescopic rails 2, the Latch 9 engages. After releasing the latch 12, the subrack 3 slide it back into the cabinet frame 1 on the telescopic rails 2.

In Figure 2, the preferred embodiment of a molded part 5 is shown.

It consists essentially of a plate 15 with a trapezoidal shape Outline.

In each of the non-parallel sides of the plate 15 there is a depression 16 attached with gently rising towards the longer parallel side of the plate 15 Flank 17. A U-shaped depression connects to the gently rising flank 17 18 parallel to the longer side of the plate 15.

The recess 16 forms the first bearing point 6, the recess 18 the second bearing point 7 for the bearing pin 8, see FIG. 1.

An opening is symmetrical to the longitudinal center line c-c of the plate 15 19 attached, which is a perpendicular to the plane of the plate resilient element 20 with a centrally arranged locking lug 21. = parallel to the longitudinal center line c - c ' and two strips 22 rise symmetrically thereto from a plate surface.

The distance between the strips 22 corresponds to the width of the telescopic rail part, on which the molded part 5 is to be pushed or inserted.

Between the depressions 16 and the shorter parallel side of the plate 15 are symmetrical to the longitudinal center line c - c 'two perpendicular from the plane of the plate projecting axle bolts 23 are arranged, the use of which is explained in FIG.

The molded part 5 shown in Figure 2 can be made of elastic plastic manufacture in one piece.

In Figure 3, the application of the molded part 5 is shown, it is with its strips 22 on the rear end of a movable part 4 'of the telescopic rail 2 pushed on, the locking lug 21 is in a correspondingly arranged bore 24 locked in the movable part 4 ', so that the molded part 5 in the longitudinal as well as in the transverse direction is fixed.

On the overhead axle pin 23 it is in the form of a one-armed Pivot lever having, already mentioned in Figure 1 bolt 12 pushed and attached, the locking edge of which is supported against the shoulder 13.

As can be easily seen, the molded piece 5 can be due to its to the longitudinal center line c - c symmetrical design on the envelope, d. H. on the use the right and left telescopic rails of a pair of telescopic rails.

Commercially available telescopic rails can advantageously be used in which only the hole 24 for the locking lug 21 is to be attached.

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Claims (7)

Claims 1. Device for holding subracks electronic assemblies in telescopic rails that can be pulled out of cabinet racks, characterized by parts of a pair of telescopic rails which can be pulled out to the rear ends (2) molded parts that can be pushed on and connected to them in a non-positive and / or form-fitting manner (5) with - a first bearing point (6) for one of two coaxially on the side Subrack (3) attached bearing pin (8), - one each, in the extension direction in front of the first bearing point (6) lying second bearing point (7) into which the bearing journals (8) when pulling out and lifting the rack (3) from its normal position enter and in which the rack (3) can be pivoted upwards. 2 Device according to claim 1, d a d u r c h g e -k e n n z e i c h n e t that a resilient detent (20, 21) is attached to the molded part (5), which cooperates with a recess (24) in the telescopic rail (2, 4 '). 3. Device according to claim 1, d a d u r c h g e -k e n n z e i c h n e t that on the molded part (5) an arrangement for locking the telescopic rails (2) is attached in the extended position. 4. Device according to claim 1 and 2, d a d u r c h g e k e n n z e i c h n e t that the molded part (5) has the following features: a) a plate (15) with a trapezoidal outline, b) a depression (16) in each of the non-parallel Sides of the plate (15) with a gently rising towards the longer parallel side Flank (17) as the first bearing point (6), c) one on the flat flank (17) subsequent U-shaped recess (18) parallel to the longer side of the plate (15) as a second bearing point (7), d) two symmetrical and parallel to the longitudinal center line c - c strips extending vertically from a plate surface and rising therefrom (22), the distance between which corresponds to the width of the telescopic rail part (4 #). 5. Device according to claim 3, g e k e n n z e i c h -net by a) two symmetrical to the longitudinal center line c - c of the plate (15) and perpendicular to the plane of the plate arranged between the depressions (16) and the shorter parallel side of the plate Axle bolts (23), b) one that can be slipped onto one of the axle bolts (23) and around this pivotable bolt (12), the axially parallel bolt edge of which is in Working position against a fixed shoulder (13) in the front level of the cabinet frame (1) is supported. 6. Device according to claim 1 and / or 4, d a d u r c h g e k e n n z e i c h n e t that the molded part (5) is made in one piece from elastic plastic is. 7. Device according to claim 1 or 4, d a d u r c h g e k e n n z e i c h n e t that the second bearing point (7) from the first bearing point (6) so is far away that the fully extended rack (3) by one Angle greater than 90 0 can be pivoted upwards from its normal position.