DK161925B

DK161925B - PLATE SHAPE MOUNTING INSTALLATION FOR ELECTRICAL BOARD

Info

Publication number: DK161925B
Application number: DK18087A
Authority: DK
Inventors: Dan Soerensen
Original assignee: Cubic Modulsystem As
Priority date: 1987-01-14
Filing date: 1987-01-14
Publication date: 1991-08-26
Also published as: DK18087A; DK161925C; DK18087D0

Description

DK 161925 BDK 161925 B

Den foreliggende opfindelse angår en pladeformet montageindsats til el-tavle og af den i indledningen til krav 1 angivne art.The present invention relates to a plate-shaped electrical board insert and of the kind specified in the preamble of claim 1.

5 Ved opbygning af el-tavleanlæg anvender de forskellige tavlefabrikanter sædvanligvis et ganske bestemt målmæssigt modul. Med henblik på nemt og entydigt at kunne indpasse de forskellige komponenter, der skal indbygges i el-tavlen, må man tilsvarende råde over diverse montageindsatse, der dels er til-10 passet det aktuelle tavlemodul, og som dels kan tilpasses efter de forskellige indbygningskomponenter, f.eks. med hensyn til indbygningsdybden i forhold til el-tavlens bærende dele samt dens lågplader, hvori betjeningsudstyret for de respektive indbygningskomponenter normalt er anbragt. Disse forhold 15 medfører, at det enkelte tavlesystem kan omfatte adskillige forskellige montageindsatse, hvilket selvsagt betyder øgede omkostninger samt ekstra arbejde ved ekspedition af tilbehørsdele, idet en meget stor del af det egentlige montagearbejde ved opbygning af el-tavler foregår ude hos kunden og udføres 20 af lokale montører. Følgelig har det endog stor betydning, at montagen af el-tavlen inklusiv indbygningen deri af forskellige komponenter såsom gruppeafbrydere, sikringsholdere m.m. kan forenkles mest muligt.5 When designing electrical panels, the various panel manufacturers usually use a very specific target module. In order to be able to easily and unambiguously fit the various components to be built into the electrical board, one must similarly have various mounting inserts, which are partly adapted to the current switchboard module and which can partly be adapted to the different installation components, eg. with respect to the depth of installation in relation to the parts of the electrical board and its cover plates, in which the operating equipment for the respective installation components is normally placed. These conditions 15 mean that the individual switchboard system can comprise several different mounting efforts, which of course means increased costs as well as extra work on the handling of accessory parts, since a very large part of the actual assembly work when building electrical panels takes place at the customer and is carried out 20 by local installers. Accordingly, it is even of great importance that the assembly of the switchboard including the incorporation therein of various components such as group switches, fuse holders etc. can be simplified as much as possible.

25 Opfindelsen har til formål at angive en montageindsats af den indledningsvis nævnte art, og ved hjælp af hvilken montagearbejdet ved indbygning af komponenter i el-tavler kan lettes betydeligt ved enkle foranstaltninger.The invention has for its object to provide a mounting insert of the kind mentioned above, and by means of which the mounting work can be considerably facilitated by simple measures in the installation of components in electrical panels.

30 Montageindsatsen ifølge opfindelsen er ejendommelig ved, at montageindsatsen ved nævnte endedel og i afstand fra en fri, tværgående endekant deraf er udformet med en nøglehul-lignende åbning udformet af et nedre, større hul og et øvre, mindre hul, hvor pladematerialet mellem hulkanterne er fjernet, og at 35 der ovenfor midten af den mindste huldel af "nøglehullet" er præget et punktformet fremspring, hvilket fremspring er placeret indenfor nævnte udkravning af hjælpebeslaget, når nævnte mindre huldel af "nøglehullet" er indført på nævnte holdeskrueThe mounting insert according to the invention is characterized in that the mounting insert at said end part and at a distance from a free transverse end edge thereof is formed with a keyhole-like opening formed by a lower, larger hole and an upper, smaller hole, the plate material between the hole edges being removed, and a point-shaped projection is projected above the center of the smallest portion of the "keyhole", said projection being positioned within said recess of the auxiliary fitting when said smaller portion of the "keyhole" is inserted on said retaining screw.

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2 bagved en hoveddel deraf, som er beregnet til at kunne indføres gennem nævnte større huldel af "nøglehullet''. Herved opnås ved meget enkle foranstaltninger mulighed for også at anvende det kendte hjælpebeslag, der ellers er udviklet til brug 5 ved befæstigelse af nævnte sprosse til nævnte hjørneskinne eller til en anden sprosse, som befæstigelsesbeslag for montageindsatsen såvel til en sprosse som til en hjørneskinne, idet der blot anvendes en særlig holdeskrue, således at nævnte endedel af montageindsatsen kan fastkiles mellem hoveddelen af 10 holdeskruen og den ringformede forside af nævnte udkravning. Montageindsatsen fikseres på enkel måde ved samvirkning med nævnte punktformede fremspring, når dette indgriber bagved en øvre topsidedel af udkravningen. Montageindsatsen kan således let monteres i korrekt position på hjælpebeslaget, som forlods 15 er indsat i et aflangt modulhul i den indadvendende flangedel af en sprosse eller en hjørneskinne, idet et let slag på en øvre kantdel af endedelen vil bringe denne i korrekt og præcis indgreb med hjælpebeslaget, der i øvrigt samtidig fikseres i forhold til sprossen henholdsvis hjørneskinnen. Også eventuel 20 demontage af montageindsatsen kan foregå meget let ved et op ådre tt et slag på en nedre kantdel af endedelen, således at montageindsatsen uden besvær kan tages af holdeskruen.2 behind a main part thereof which is intended to be inserted through said larger part of the "keyhole", thereby providing very simple measures also the use of the known auxiliary bracket, which is otherwise developed for use 5 in attaching said ratchet to said corner rail or to another ratchet as a mounting bracket for the mounting insert both for a ratchet and to a corner rail, using only a special retaining screw so that said end portion of the mounting insert can be wedged between the main portion of the retaining screw and the annular front of said recess The mounting insert is easily fixed by interaction with said point-shaped protuberance when it engages behind an upper top side portion of the collar, so the mounting insert can easily be mounted in the correct position on the auxiliary bracket, which is inserted into an elongate module hole in the inwardly flanged portion of a groove. or a corner rail, with a l a stroke on an upper edge portion of the end portion will bring it into proper and precise engagement with the auxiliary bracket, which is also at the same time fixed relative to the groove and corner rail respectively. Also, any disassembly of the mounting insert can be done very easily by an upward stroke of a lower edge portion of the end portion, so that the mounting insert can be easily removed by the retaining screw.

Hensigtsmæssigt kan nævnte nøglehul-lignede åbning være udfor-25 met med indbyrdes forskudte hulcentre af henholdsvis nævnte mindre og større huldele, idet hulcentret for den mindre huldel er placeret i større afstand fra nævnte endekant af endedelen end afstanden derfra til hulcentret for den større huldel, dvs. at "nøglehullet" som helhed er placeret skævt med 30 forbedret kileeffekt ved den imod nævnte endekant vendende side af "nøglehullet". Herved opnås på enkel måde en forbedret fastholdelse af montageindsatsen i forhold til sprossen eller hjørneskinnen, idet endedelen af montageindsatsen herved yderligere fastkiles ved anpresning af nævnte endekant mod spros-35 sen eller hjørneskinnen, således at montageindsatsen også samtidig holdes i korrekt position vinkelret indadragende fra sprossen henholdsvis hjørneskinnen.Conveniently, said keyhole-like aperture may be provided with mutually displaced hollow centers of said smaller and larger hollow portions, respectively, the hollow center of the smaller hollow portion being located at a greater distance from said end edge of the end portion than the distance thereof to the hollow center of the larger hollow portion. i.e. the "keyhole" as a whole is skewed with an improved wedge effect at the opposite edge of said "keyhole". In this way, an improved retention of the mounting insert relative to the groove or corner rail is obtained in a simple way, thereby further securing the end part of the mounting insert by pressing said end edge against the groove or corner rail, so that the mounting insert is also kept in the correct position perpendicularly inwardly from the groove. respectively the corner rail.

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33

Med henblik på indbygning af komponenter i en tavlesektion begrænset af en hjørneskinne og en sprosse eller begrænset af to sprosser eller to hjørneskinner er montageindsatsen ifølge opfindelsen udformet med nævnte nøglehul-lignende åbning ved 5 modstående endedele deraf, idet "nøglehullerne" ved modstående ender af indsatspladen er udformet indbyrdes spejlvendte, dvs. med tilsvarende skævhed i forhold til modstående endekanter af indsatspladen.For the purpose of incorporating components in a board section limited by a corner rail and a chute or limited by two chutes or two corner rails, the mounting insert according to the invention is formed with said keyhole-like opening at 5 opposite end portions thereof, the "keyholes" at opposite ends of the insert plate. are mutually mirrored, ie. with corresponding skewness relative to opposite end edges of the insert plate.

10 Hensigtsmæssigt findes montageindsatsen ifølge opfindelsen desuden i to indbyrdes spejlvendte udgaver beregnet til montage af gruppeafbryder, der fastspændes til særligt udformede endedele modsat førstnævnte endedel, idet de respektive indsatsdele er forberedt til bukning i rette vinkler i nærheden 15 af deres respektive endedele, dvs. såvel i nærheden af nævnte særligt udformede endedele som i nærheden af førstnævnte endedele.Conveniently, the mounting insert of the invention is additionally provided in two mutually mirrored versions intended for mounting group switches which are clamped to specially designed end portions opposite to the former end portion, the respective insert portions being prepared for bending at right angles in the vicinity of their respective end portions, i. both in the vicinity of said specially designed end portions and in the vicinity of the former end portions.

For yderligere at forbedre holdeeffekten ved montageindsatsen 20 ifølge opfindelsen er denne i en foretrukken udførelsesform udformet således, at nævnte skæve "nøglehuller" i nævnte endedele ved den side, der vender imod nævnte frie endekant deraf, er udformet med en kort, øvre skråkant, der forløber med en bestemt kilevinkel, fortrinsvis ca. 3°, i forhold til nævnte 25 frie endekant på en sådan måde, at afstanden mellem skråkanten og den fire endekant er tiltagende opefter, og at den frie endekant af endedelen er bukket bagud, dvs. forløber buet indad mod forsiden af nævnte hjælpebeslag langs med dettes nævnte krogdel. Herved opnås nemlig en yderligere forbedret holde-30 effekt ved montageindsatsen, idet den buede kantdel sammen med nævnte kilevinkel sikrer optimal fastkiling og korrekt vinkelstilling af montage indsatsen i forhold til hjørneskinnen henholdsvis sprossen, og den indad-bukkede kantdel giver desuden en god sideværts støtte imod hjælpebeslaget langs med inder-35 siden af sprossen henholdsvis hjørneskinnen.In order to further enhance the holding power of the mounting insert 20 of the invention, it is in a preferred embodiment such that said skewed "key holes" in said end portions at the side facing said free end edge thereof are formed with a short upper bevel edge which extends at a particular wedge angle, preferably approx. 3 °, with respect to said free end edge in such a way that the distance between the inclined edge and the four end edge is increasing upwards and that the free end edge of the end part is bent backwards, ie. extends inwardly toward the front of said auxiliary fitting along said hook portion. Hereby, a further improved holding effect is obtained at the mounting insert, the curved edge part together with said wedge angle ensures optimum wedging and correct angular positioning of the mounting insert with respect to the corner rail and the groove respectively, and the inwardly bent edge part also provides good lateral support against the auxiliary bracket along the inner side of the chute and the corner rail respectively.

Med henblik på enkel tilpasning af montageindsatsen til befæs-tigelse mellem sprosser og hjørneskinner helt vilkårligt ogWith a view to simple adaptation of the mounting insert for fastening between brackets and corner rails completely arbitrarily and

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4 samtidig opretholdelse af af korrekt indbygningsdybde, er mon-1 tageindsatsen ifølge opfindelsen indenfor og i nærheden af førstnævnte endedele forberedt til bukning i rette vinkler ved flere efter hinanden udformede bukkelinier i form af rækker af 5 aflange huller eller slidser for tilpasning af montageindsatsen efter, om den skal befæstiges mellem hjørneskinner eller mellem sprosser eller eventuelt mellem en hjørneskinne og en sprosse, idet nævnte indadvendende flangedele deraf er anbragt i indbyrdes forskellige dybder henholdsvis indbyrdes forskel-10 lig vandret afstand.4 while maintaining proper installation depth, the mounting insert according to the invention is prepared within and near the former end portions for bending at right angles at several successively shaped bending lines in the form of rows of 5 oblong holes or slots for adjusting the mounting insert after, whether it is to be fixed between corner rails or between rails or, optionally, between a corner rails and a ridge, said inwardly flanged portions thereof being disposed at mutually different depths and at different horizontal distances respectively.

Opfindelsen forklares i det følgende nærmere i forbindelse med tegningen, på hvilken:- 15 Fig. 1 er et perspektivisk billede af en sprossedel og et hjælpebeslag for en montageindsats ifølge opfindelsen, fig. 2 et perspektivisk billede af en endedel af en foretruk-ken udførelsesform for en montageindsats ifølge opfindelsen, 20 og fig. 3 et snitbillede af en el-tavle til illustration af anvendelsen af montageindsatsen ifølge opfindelsen.BRIEF DESCRIPTION OF THE DRAWINGS The invention will now be described in more detail in connection with the drawing, in which: - FIG. 1 is a perspective view of a ratchet member and an auxiliary fitting for a mounting insert according to the invention; FIG. 2 is a perspective view of an end portion of a preferred embodiment of a mounting insert according to the invention; and FIG. 3 is a sectional view of a switchboard for illustrating the use of the mounting insert according to the invention.

25 I fig. 1 er vist en del af en sprosse 2, der ved modstående korts ider samt ved indadvendende flangedele 4 er udformet med aflange modulhuller 6 beregnet til befæstigelse af forskellige indsatsdele for diverse komponenter såsom gruppemateriel, sikringsholdere o.l. Et hjælpebeslag 8, der ellers er et såkaldt 30 sprossebeslag, dvs. beregnet til befæstigelse af en sprosse 2 til en hjørneskinne 10 (fig. 3), er monteret i et af modulhullerne 6, idet en bukket krogdel af sprossebeslaget 8 er indført i hullet 6, hvorefter sprossebeslaget 8 er svunget indad til den viste stilling. Normalt er sprossebeslaget 8 be-35 regnet til optagelse af en fladhovedet skrue, der fra forsiden af en endedel af en sprosse 2 udformet med et forsænket hul, der ved bagsiden af sprossen 2 passer ind i en cirkulær ud-kravning 12 af sprossebeslaget 8 på en sådan måde, at nævnte 5In FIG. 1, a portion of a groove 2 is shown which is formed by elongated module holes 6 for opposing card ideas and inward flange portions 6 for fixing various insert parts for various components such as group material, fuse holders and the like. An auxiliary bracket 8, which is otherwise a so-called 30 bracket bracket, ie. intended for attaching a clamp 2 to a corner rail 10 (Fig. 3), is mounted in one of the module holes 6, a curved hook portion of the clamp bracket 8 being inserted into the hole 6, after which the clamp bracket 8 is pivoted inwardly to the position shown. Usually, the bracket fitting 8 is intended to receive a flat head screw formed from the front of an end portion of a brace 2 with a recessed hole which fits at the rear of the bracket 2 into a circular recess 12 of the bracket bracket 8 on the such a way that said 5

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endedel af sprossen 2 næsten af sig selv bringes i korrekt indgreb med sprossebeslaget 8 henholdsvis en hjørneskinne 10 eller en anden sprosse 2. Til brug i forbindelse med montageindsatsen ifølge opfindelsen, f.eks. i den i fig. 2 viste ud-5 førelsesform, er sprossebeslaget 8 forsynet med en særlig holdeskrue 14, der er fastspændt i et gevindhul midt i nævnte udkravning 12. Holdeskruen 14 er udformet med en hoveddel 16 med en ved bagsiden indad mod selve skruen forløbende cirkulær kileflade 18.the end portion of the chute 2 is almost self-engaging with the chute bracket 8 or a corner rail 10 or another chute 2. For use in connection with the mounting insert according to the invention, e.g. in the embodiment of FIG. 2, the retaining bracket 8 is provided with a special retaining screw 14 which is clamped in a threaded hole in the middle of said recess 12. The retaining screw 14 is formed with a main part 16 with a circular wedge surface 18 extending inwardly towards the screw itself.

10 I fig. 2 er vist en montageindsats 20 beregnet til montering vinkelret indadragende (fig. 3) fra sprossen 2 ved befæstigel-se af monteringsindsatsen 20 til sprossebeslaget 8 ved hjælp af holdeskruen 14. En endedel 22 af montageindsatsen 20 er til 15 dette formål udformet med en nøglehul-lignende åbning 24, der som vist har en større, nedre huldel og en øvre, mindre huldel, hvilke huldele er indbyrdes forskudt i sideretningen, således at centeret af den mindre huldel er placeret i større afstand fra en fri, tværgående endekant 26 af endedelen 22 end 20 afstanden til centeret for den større huldel. Herved er "nøglehullet" udformet lidt skævt i forhold til endekanten 26. Derudover er "nøglehullet" 24 udformet med en kort, øvre kilekant 28, der ved den side af "nøglehullet" 24, der vender imod endekanten 26, forløber i en skråvinkel på ca. 3° netop i for-25 hold til endekanten 26. Denne er i øvrigt bukket bagud, således at den forløber buet ind imod forsiden af sprossebeslaget 8, når montageindsatsen 20 er monteret korrekt på sprossebeslaget 8 med endekanten 26 anliggende mod indersiden af flangedelen 4 af sprossen 2.10 In FIG. 2 is shown a mounting insert 20 intended for mounting perpendicular inwardly (Fig. 3) from the clamp 2 by attaching the mounting insert 20 to the clamping bracket 8 by means of the holding screw 14. An end part 22 of the mounting insert 20 is designed for this purpose with a keyhole. -like opening 24 having, as shown, a larger, lower hollow portion and an upper, smaller hollow portion, which hollow portions are mutually displaced in the lateral direction so that the center of the smaller hollow portion is spaced at greater distance from a free transverse end edge 26 of the end portion. 22 than 20 the distance to the center of the larger cavity. Hereby, the "keyhole" is slightly skewed relative to the end edge 26. In addition, the "keyhole" 24 is formed with a short upper wedge edge 28 extending at the side of the "keyhole" 24 facing the end edge 26 at an inclined angle of ca. 3 ° precisely in relation to the end edge 26. This is also bent backwards so that it extends curved towards the front of the clamping bracket 8 when the mounting insert 20 is mounted correctly on the bracket bracket 8 with the end edge 26 abutting the inside of the flange part 4 of sprouts 2.

3030

Lidt oven over den mindre huldel er endedelen 22 af montageindsatsen 20 udformet med et bagudrettet punktformet fremspring 30, der er dannet ved prægning fra forsiden af montageindsatsen 20. Fremspringer 30 er placeret således, at det kan 35 samvirke med indersiden af udkravningen 12 af sprossebeslaget 8, når montageindsatsen 20 er indført med den større huldel af "nøglehullet" omkring holdeskruen 14 og presset nedad indtil selve holdeskruen 14 er placeret i den mindre huldel af "nøg- • i 6Slightly above the smaller hollow portion, the end portion 22 of the mounting insert 20 is formed with a rearward point-shaped projection 30 formed by embossing from the front of the mounting insert 20. The protuberances 30 are positioned to interact with the inside of the collar 12 of the bracket 8. , when the mounting insert 20 is inserted with the larger hollow portion of the "keyhole" around the retaining screw 14 and pressed downward until the retaining screw 14 itself is positioned in the smaller portion of "keyhole"

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lehullet" 24. I denne position er endedelen 22 af montageindsatsen 20 fikseret i fastklemt tilstand og i korrekt stilling i forhold til sprossen 2 eller eventuelt i forhold til en hjørneskinne 10 (fig. 3) , idet afstanden fra sprossen 2 hen-5 holdsvis hjørneskinnen 10 til holdeskruen 14 af sprossebeslaget 8 er nøje afpasset efter den vandrette afstand mellem endekanten 26 og kilekanten 28 af "Nøglehullet" 24. Den buede form af endedelen 22 ved endekanten 26 udvirker en god side-støtte for montageindsatsen 20 imod forsiden af sprossebesla-10 get 8 langs med indersiden af sprossen 2 henholdsvis hjørneskinnen 10.hole 24 ". In this position, the end portion 22 of the mounting insert 20 is fixed in a clamped condition and in proper position with respect to the chute 2 or, optionally, relative to a corner rail 10 (Fig. 3), the distance from the chute 2 and the corner rail respectively. 10 to the retaining screw 14 of the bracket 8 is closely aligned with the horizontal distance between the end edge 26 and the key edge 28 of the "keyhole" 24. The curved shape of the end portion 22 at the end edge 26 provides good side support for the mounting insert 20 against the front of the bracket-10. get 8 along the inside of the chute 2 and the corner rail 10, respectively.

Montageindsatsen 20 er meget nem at fastgøre til sprossebeslaget 8, der i forvejen er fastgjort til sprossen 2 eller til 15 hjørneskinnen 10. "Nøglehullet" 24 indføres blot over holdeskruen 14, hvorefter en øvre indbukket kantdel 32 af endedelen 22 påvirkes med et let nedadrettet slag for påpladsføring af montageindsatsen 20 i korrekt, fikseret position i forhold til sprossen 2 eller hjørneskinnen 10.The mounting insert 20 is very easy to attach to the clamping bracket 8, which is already attached to the clamping bracket 2 or to the corner rail 10. The "keyhole" 24 is inserted simply over the retaining screw 14, after which an upper curved edge portion 32 of the end portion 22 is affected by a slight downward stroke. for placing the mounting insert 20 in the correct, fixed position with respect to the chuck 2 or the corner rail 10.

2020

Demontage af montageindsatsen ifølge opfindelsen kan også foregå på ganske let måde, idet en nedre indbukket kantdel 34 af endedelen 22 blot påvirkes med et let opadrettet slag for ophævelse af fikseringsindgrebet mellem fremspringet 30, udkrav-25 ningen 12, kilekanten 28 samt endekanten 26, hvorefter montageindsatsen 20 kan udtages fra holdeskruen 14.Disassembly of the mounting insert according to the invention can also be carried out quite easily, in that a lower curved edge part 34 of the end part 22 is simply actuated with a slightly upward stroke to cancel the fixing engagement between the projection 30, the recess 12, the wedge edge 28 and the end edge 26, after which the mounting insert 20 can be removed from the holding screw 14.

Med henblik på at kunne tilpasse montageindsatsen 20 såvel i afhængighed af korrekt indbygningsdybde som i forhold til den 30 varierende vandrette afstand mellem indgrebsområdet med en sprosse 2 henholdsvis en hjørneskinne 10 er montageindsatsen 20 indenfor endedelen 22 deraf udformet med forberedte bukkelinier i form af lodrette rækker af aflange huller eller slidser 36. Afstanden A mellem disse bukkelinier er naturligvis 35 nøje afstemt efter nævnte bredde-/dybdeforhold, således at der - som vist i fig. 3 - kan opnås samme indbygningsdybde mellem to sprosser 2, mellem to hjørneskinner 10 eller mellem en sprosse 2 og en hjørneskinne 10, idet afstanden A netop udgørIn order to be able to adjust the mounting insert 20, depending on the correct installation depth and with respect to the 30 varying horizontal distance between the engagement area with a groove 2 and a corner rail 10, the mounting insert 20 within the end part 22 thereof is formed with prepared bending lines in the form of vertical rows of oblong holes or slots 36. The distance A between these bending lines is, of course, 35 precisely adjusted to said width / depth ratio, so that - as shown in FIG. 3 - the same installation depth can be obtained between two bars 2, between two corner rails 10 or between a groove 2 and a corner rail 10, the distance A just being

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7 forskellen mellem såvel den dybdemæssige som den breddemæssige position af de placeringsmuligheder for sprossebeslaget 8 i de indadvendende flangedele 4 af henholdsvis en sprosse 2 eller en hjørneskinne 10.7 shows the difference between both the depth and the width position of the positioning options for the bracket fitting 8 in the inwardly flange portions 4 of a ratchet 2 or a corner rail 10, respectively.

Claims

A plate-shaped assembly inserted s (20) for a switchboard and intended for attachment to or between vertical corner rails (10) and / or clusters (2) by means of an auxiliary bracket (8) preferably arranged to be attached to the corner rail (10) or the chute (2) by means of a flat hook part adapted to engage an elongate module hole (6) in a flanged flange portion of the corner rail (10) and the chute (2) respectively, which auxiliary fitting (8 ) spaced apart from said hook portion 10 is formed with a circular recess (12) around a threaded hole intended to receive a retaining screw (14) for an end portion (22) of the mounting insert (20), characterized in that the mounting insert (20) ) at said end portion (22) and spaced from a free transverse end edge (26) thereof is formed with a keyhole-like opening (24) formed by a lower, larger hole and an upper, smaller hole, between the sheet material between the hollow edges is removed and that above the center of the mi the bottom hole of the "keyhole" (24) is provided with a point-shaped projection (30), said projection (30) being positioned within said recess (12) of the auxiliary fitting (8) when said smaller hole of the "keyhole" (24) is inserted on said retaining screw (14) behind a main portion (16) thereof intended to be inserted through said larger portion of the "keyhole" (24). 25

The mounting insert according to claim 1, characterized in that said keyhole-like opening (24) is formed with mutually displaced hollow centers of said smaller and larger hollow portions, respectively, the hollow center of the smaller hollow part being located at a greater distance from said end edge. (26) of the end portion (2 2) than the distance thereof to the hole center of the larger hole portion, i. the "keyhole" (24) as a whole is skewed with improved wedge power at the side facing the end edge (26) of the "keyhole" (24). DK 161925 B 9

Mounting insert according to claims 1 and 2, characterized in that the mounting insert is formed with said keyhole-like opening (24) at each of the opposite end portions (22) thereof, the "keyholes" (24) at opposite ends of the insert plate. are mutually mirrored, ie. with corresponding skewness with opposite end edges (26) of the insert plate (20).

Mounting insert according to claims 1 and 2, characterized in that the mounting insert is provided in two mutually mirrored versions intended for mounting a group switch which is clamped to specially designed end parts opposite to the first mentioned end parts (22), the respective insert parts being prepared for bending in right angles near their respective end portions, ie. 15 in the vicinity of said specially designed end portions as well as in the vicinity of the former end portions (22).

Mounting insert according to claims 1 and 2, characterized in that said skewed keyhole-like openings (24) in said 20 end parts (22) at the side facing said free end edge (26) thereof are formed with a short upper inclined edge (28) extending at a wedge angle, preferably of approx. 3 ° with respect to said free end edge (26) in such a way that the distance between the inclined edge (28) and the free end edge (26) is increasing upwardly and that the free end edge (26) of the end part (22) is bent backwards, i.e. extending inwardly toward the front of said auxiliary bracket (8) along said hook portion.

Mounting insert according to claims 1 and 4, characterized in that the mounting insert inside and in the vicinity of the former end parts (22) is prepared for bending at right angles at several successive bending lines in the form of rows of elongated holes or slits (36). for adjusting the mounting insert according to whether it is to be fixed between corner rails 35 (10), between clusters (2) or optionally between a corner rails (10) and a ratchet (2), said inwardly flange parts (4) thereof being arranged at different depths and with different horizontal distances respectively.