DK147549B

DK147549B - INPUT TO CABLE CLIPS

Info

Publication number: DK147549B
Application number: DK513780A
Authority: DK
Inventors: Fini Malmros
Original assignee: Conblock Aps
Priority date: 1980-12-02
Filing date: 1980-12-02
Publication date: 1984-09-24
Also published as: EP0066585A1; FI66704B; WO1982001963A1; DK513780A; DK147549C; FI822663A0; FI66704C; FI822663L

Description

i 147549in 147549

Den foreliggende opfindelse angår et indlæg til en ledningsklemme til samling af elektriske ledninger bestående af et hus med en ledningsoptagende åbning og i huset indsatte skruer til fastklemning af ledningerne, hvor 5 huset er dannet af til en lukket kanal bukket plademateriale med overlæg.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an insert for a cable clamp for assembling electrical wiring consisting of a housing having a wiring receiving opening and screws inserted into the housing for clamping the wires, the housing being formed of a closed ducted sheet material with overlays.

Det er til samling af stærkstrømsledninger et generelt forlangende, at ledningerne skal fastgøres med skrueforbindelser, og at elementet, som overfører strømmen, skal lo have et bestemt mindsteindhold af kobber (58%). Det har derfor hidtil været sædvanligt at fremstille indlæg ud fra et messingprofil, hvori den ledningsoptagende åbning dannes ved boring fra begge ender, og hvor der derefter udføres gevindhuller for skruerne vinkelret på ledningsåbnin-15 gen. Et sådant indlæg er imidlertid relativt kostbart, dels på grund af messings høje pris, dels på grund af de relativt langsomme og dermed kostbaré boreoperationer. Det er også kendt at udføre indlæg af en messingpladestrimmel, som bukkes til et lukket hus, idet strimlens ender overlap-2o per hinanden og forsynes med skruehuller, således at de indbyrdes overlappende endedele kan holdes sammen af skruerne. Udover den også her optrædende høje materialepris er der den ulempe, at skruehullerne let trækkes ovale ved skruernes tilspænding og derefter vanskeliggør senere ud- og 25 indskruning. Endvidere kan skruerne ikke tilvejebringe en stabil sammenholdelse af pladestrimlens endedele.It is a general requirement for the assembly of high current lines that the wires must be fastened with screw connections and that the element transmitting the current must have a certain minimum content of copper (58%). Therefore, it has thus far been customary to make inserts from a brass profile in which the wire receiving opening is formed by drilling from both ends, and then thread holes for the screws perpendicular to the wire opening are performed. However, such a post is relatively expensive, partly because of the high cost of brass, and partly because of the relatively slow and thus costly drilling operations. It is also known to insert a brass sheet strip which is bent into a closed housing, the ends of the strip overlap-2o each other and provided with screw holes so that the overlapping end portions can be held together by the screws. In addition to the high material price, which is also present here, there is the disadvantage that the screw holes are easily pulled oval by the tightening of the screws and subsequently make it difficult to unscrew and screw in later. Furthermore, the screws cannot provide a stable connection of the end strips of the plate strip.

Formålet med den foreliggende opfindelse er at undgå de nævnte ulemper ved de kendte konstruktioner og ifølge opfindelsen opnås dette ved, at pladematerialet, hvoraf 3o huset er dannet, er et mekanisk stærkt materiale, såsom jern, og at en skinne af elektrisk ledermateriale er indlagt i huset over de indbyrdes overlappende pladedele og er i mekanisk indgrebsforbindelse med begge disse pladedele, samt at skruehullerne findes i den modstående side af 35 huset. Idet den nævnte skinne er tilstrækkelig til overføring af strømmen, kan selve huset udføres af et andet materiale end kobber eller messing, og specielt kan det som anført udføres af jern. Når huset udføres af jern eller et 2 U7569 lignende materiale, fås der ikke blot et billigt indlæg, men dette får også en større styrke, end hvis det er fremstillet af messing. De ovennævnte problemer ved et af messingplade bukket indlæg optræder derfor ikke. Skinnens 5 mekaniske indgreb med de indbyrdes overlappende pladedele tilvejebringer en effektiv og stabil sammenholdelse af disse, hvorfor skruernes tilspænding ikke kan bevirke en åbning af huset, ligesom skruehullerne forbliver intakte efter skruernes tilspænding, så at eventuel senere ind- og lo udskruning sker uden vanskelighed. Da fremstillingen af indlægget endvidere sker i hovedsagen ved stanse- og bukkeoperationer og kun i ringe grad ved boreoperationer, er den samlede fabrikartionstid relativt kort.The object of the present invention is to avoid the mentioned disadvantages of the known constructions and according to the invention this is achieved by the fact that the sheet material, of which the housing is formed, is a mechanically strong material such as iron and that a rail of electrical conductor material is laid in the housing over the overlapping plate parts and is in mechanical engagement with both of these plate parts, and that the screw holes are located on the opposite side of the housing. As the said rail is sufficient to transmit the current, the housing itself may be made of a material other than copper or brass, and in particular, as stated above, it may be made of iron. When the housing is made of iron or a similar material, not only is a cheap insert available, but this also gives a greater strength than if it is made of brass. The aforementioned problems with a brass plate bend, therefore, do not occur. The mechanical engagement of the rails 5 with the overlapping plate parts provides an effective and stable relationship between them, so the tightening of the screws cannot cause an opening of the housing, just as the screw holes remain intact after the tightening of the screws, so that any subsequent screw-in and loosening is done without difficulty. Furthermore, since the insert is made mainly in punching and bending operations and only to a small extent in drilling operations, the total manufacturing part time is relatively short.

En udførelsesform for indlægget ifølge opfindelsen 15 er ejendommelig ved, at de indbyrdes overlappende pladedele af huset er forsynet med over hinanden liggende indhak ved husets ender, som optager ombukkede endeflige på skinnen. Herved fås en sikker låsning af de indbyrdes overlappende pladedele alene ved simple og hurtige bukkeoperatio-2o . ner.An embodiment of the insert according to the invention 15 is characterized in that the mutually overlapping plate parts of the housing are provided with superposed notches at the ends of the housing which receive folded end flaps on the rail. This provides secure locking of the overlapping plate parts only by simple and fast bending operation-2o. NER.

Ved en yderligere udførelsesform ifølge opfindelsen er den ydre pladedels indhak dybere end den indre pladedels indhak, og skinnens endeflige er beliggende helt i den ydre pladedels indhak. Herved opnås, at undersiden af indlæg-25 get er plan, hvilket er en fordel, da indlægget skal anbringes i et isolerende plasthus.In a further embodiment of the invention, the notch of the outer plate part is deeper than the notch of the inner plate part and the end flaps of the rail are located completely in the notch of the outer plate part. This results in that the underside of the insert is flat, which is an advantage as the insert must be placed in an insulating plastic housing.

For at undgå at den fra den ene ende af huset indsatte ledning skal udfylde hele kanalen, kan huset ifølge opfindelsen have mindst én fra en sidevæg ind i den gen-3o nemgående kanal i huset indbukkelig lap. Sådanne lapper anbringes hensigtsmæssigt midt i kanalen og virker således som endestop for de indsatte ledninger.In order to prevent the duct inserted from one end of the housing from filling the entire duct, the housing according to the invention may have at least one from a side wall into the through-passage ductable in the housing. Such patches are conveniently placed in the middle of the channel and thus act as end stops for the inserted wires.

For at forhindre at skruerne ved tilspændingen skal ødelægge de indsatte ledninger, kan indlægget være forsy-35 net med en skinneformet trådbeskytter, og for på simpel måde at opnå en sikker anbringelse af trådbeskytteren kan ifølge opfindelsen siden af huset, hvori skruehullerne findes, have flige beliggende over de indbukkelige lapper.In order to prevent the screws from tightening the inserted wires during tightening, the insert can be provided with a rail-shaped wire protector, and in order to obtain a simple arrangement of the wire protector according to the invention, the side of the housing in which the screw holes can be found may have tabs. perched above the malleable patches.

3 U7549 hvilke flige er indrettet til at bukkes ned mod lapperne·, efter at den skinneformede trådbeskytter er indlagt i kanalen over lapperne.3 U7549 which tabs are arranged to bend down against the patches · after the rail-shaped wire protector is inserted into the channel over the patches.

Opfindelsen skal herefter forklares nærmere under 5 henvisning til tegningen, hvor fig. 1 viser et emne til fremstilling af en udførelsesform for indlægget ifølge opfindelsen, fig. 2 en elektrisk ledende skinne til montering i indlægget, lo fig. 3 et langsgående snit i et af emnet i fig. 1 fremstillet indlæg ifølge opfindelsen, fig. 4 indlægget i fig. 3 set fra enden, fig. 5 et tværsnit efter linien V-V i fig. 3, fig. 6 et tværsnit efter linien VI-VI i fig. 3, 15 fig. 7 indlægget i fig. 3 set fraoven, fig. 8 indlægget i fig. 3 med en deri monteret trådbeskytter og fig. 9 et tværsnit efter linien IX-IX i fig. 8.The invention will be explained in more detail below with reference to the drawing, in which fig. 1 shows a blank for making an embodiment of the insert according to the invention; FIG. 2 shows an electrically conductive rail for mounting in the insert, fig. 3 is a longitudinal section of one of the blank of FIG. 1 in accordance with the invention, fig. 4 shows the insert of FIG. 3 from the end, FIG. 5 is a cross-sectional view taken along line V-V of FIG. 3, FIG. 6 is a cross-sectional view taken along line VI-VI of FIG. 3, 15 FIG. 7 shows the insert of FIG. 3 from above; FIG. 8 shows the insert of FIG. 3 with a wire protector mounted therein; and FIG. 9 is a cross section along line IX-IX of FIG. 8th

På tegningen viser fig. 1 et af et stålbånd udstanset 2o emne 1 til fremstilling af indlægget ifølge opfindelsen. Emnets ender 2 og 3 er bestemt til efter bukning af emnet til en i hovedsagen rektangulær form at ligge over hinanden og er forsynet med udskæringer henholdsvis 4 og 5, hvoraf udskæringerne 4 er noget dybere end udskæringerne 5. Emnet har 25 endvidere en central H-formet udskæring 6, hvorved der er dannet tunger 7, hvis formål skal forklares nærmere nedenfor. Endelig er der i emnet vist et antal små cirkulære udstansninger 8,9 og lo samt eventuelle stansesnit 11 i tilslutning til hullerne lo, hvorved der fremkommer lapper 12.In the drawing, FIG. 1 in a steel band punched 20 in blank 1 for making the insert according to the invention. The ends 2 and 3 of the workpiece are intended to lie over one another after bending the workpiece to a generally rectangular shape and are provided with cuts 4 and 5, respectively, of which the cuts 4 are somewhat deeper than the cuts 5. The blank further has a central H-shape. shaped cut-out 6, whereby tongues 7 are formed, the purpose of which is explained in more detail below. Finally, there are shown in the blank a number of small circular punches 8,9 and 10, as well as any die cut 11 in connection with the holes 1o, whereby patches 12 appear.

3o Fig. 2 viser en af elektrisk godt ledende materiale, såsom messing, udstanset lederstrimmel eller skinne 13, hvis ender 14 har en bredde, der er lidt mindre end bredden af udskæringerne 4 og 5 i emnet 1.3o FIG. 2 shows an electrically well conductive material such as brass, punched conductor strip or rail 13, the ends of which 14 have a width slightly smaller than the width of the cut-outs 4 and 5 in the blank 1.

I fig. 3-7, som viser emnet 1, efter at dette er buk-35 ket til et rektangulært hus 15, vil det ses, at enderne 2 og 3 af emnet ligger over hinanden, idet enden 2 med de største udskæringer 4 ligger udvendigt. Efter bukningen af emnet 1 er lederstrimlen 13, hvis bredde er ganske lidt mindre end den indvendige bredde af huset 15, indlagt deri, og enderne 4 147549 14 er derpå bukket udad gennem udskæringerne 5 for således at ligge an mod undersiden af endedelen 3 i udskæringerne 4, som det fremgår af fig. 3 og 4. Herved opnas en effektiv og stabil sammenlåsrfing af de indbyrdes over-5 lappende ender 2 og 3 af emnet, samtidig med at undersiden af indlægget bliver plan uden udragende dele af lederstrimlens flige.In FIG. 3-7, showing the workpiece 1 after being bent to a rectangular housing 15, it will be seen that the ends 2 and 3 of the workpiece are superimposed, the end 2 having the largest cut-outs 4 lying on the outside. After bending the blank 1, the conductor strip 13, the width of which is quite a bit smaller than the inner width of the housing 15, is inserted therein, and the ends 4 147549 14 are then bent outwardly through the cut-outs 5 so as to abut the underside of the end part 3 of the cut-outs. 4, as shown in FIG. 3 and 4. This provides an effective and stable interlocking of the overlapping ends 2 and 3 of the workpiece, at the same time that the underside of the insert becomes flat without protruding parts of the tab of the conductor strip.

Med udgangspunkt i de udstansede huller 9 trækkes det omliggende materiale op til dannelse af skruehuller 16, lo som forsynes med gevind. De eventuelt udstansede huller 8 tjener til at reducere materialeophobning ved optrækningen, som det fremgår af fig. 5.Starting from the punched holes 9, the surrounding material is pulled up to form screw holes 16, 10, which are threaded. The possibly punched holes 8 serve to reduce material accumulation in the pull-out, as shown in FIG. 5th

Den indtil nu beskrevne konstruktion (uden udstansningerne 6,lo og 11) udgør et færdigt indlæg, som på sæd-15 vanlig måde monteres i et plasthus med ikke viste skruer indsat i skruehullerne 16. På grund af den viste bukning af emnet 1 fås der en særdeles stiv ramme, når denne er fremstillet af jern eller et lignende materiale i stedet for messing/og endvidere undgås, at skruehullet kan trækkes 2o ovalt,ligesom trykket mod den dobbelte bund hidrørende fra den fastspændte skrue ikke kan presse de indbyrdes overlappende ender 2 og 3 fra hinanden som følge af den deraf upåvirkede låsning ved hjælp af lederstrimlen 13,14. Ved indlæggets anvendelse presser skruerne de indsatte lednin-25 ger mod lederstrimlen 13, der således tilvejebringer den nødvendige elektriske ledningsevne af indlægget.The construction described so far (without the punches 6, 10 and 11) constitutes a finished insert which is usually mounted in a conventional manner in a plastic housing with screws not shown, inserted into the screw holes 16. Due to the shown bending of the blank 1, a particularly rigid frame when made of iron or a similar material instead of brass / and furthermore, the screw hole can be pulled 20 ovally, just as the pressure against the double bottom resulting from the clamped screw cannot press the mutually overlapping ends 2 and 3 apart as a result of the unaffected locking by means of the conductor strip 13,14. In the use of the insert, the screws press the inserted wires 25 against the conductor strip 13, thus providing the necessary electrical conductivity of the insert.

I fig. 4-6 er de i fig. 1 ved hjælp af stansesnittene 11 dannede ruder eller lapper 12 vist i indtrykket stilling, idet de er bukket ind på tværs i indlægget ved 3o svingning omkring en linie, som forbinder de udstansede huller lo, der alene tjener til at lette denne indbukning af lapperne. Herved lettes ledningsmontagen, idet lapperne tjener som stop, så at hele ledningshullet ikke fyldes op af den ene ledning.In FIG. 4-6 are those in FIG. 1, by means of the punch cut 11, the panes or patches 12 formed in the indented position are formed, having been bent transversely into the insert by 30 oscillating about a line connecting the punched holes 1o, which only serve to facilitate this folding of the patches. This facilitates cord assembly, the patches serving as a stop so that the entire wire hole is not filled by one wire.

35 Fig. 8 og 9 viser en i indlægget indsat trådbeskyt ter 17, der kan anvendes for at forhindre, at skruerne ved tilspændingen klemmer tynde eller på anden måde sarte ledninger over eller deformerer dem for kraftigt. Trådbeskytteren udgøres af en tynd plade, f.eks. af rustfrit fjederstål, som er indlagt over de indfoldede lapper 12 og med 147549 5 et gennem udstansningen 6 indført værktøj deformeres over lappernes overkant, som vist i fig. 8, så at den ikke kan forskydes derfra, når fligene 7 bukkes ned som vist i fig. 9.FIG. Figures 8 and 9 show a thread guard 17 inserted in the insert that can be used to prevent the screws from tightening, or otherwise deforming, too thin or otherwise delicate wires during tightening. The wire protector consists of a thin plate, e.g. of stainless spring steel inserted over the folded patches 12 and with a tool inserted through the punch 6 deforms over the top of the patches, as shown in FIG. 8 so that it cannot be displaced therefrom when the tabs 7 are bent down as shown in FIG. 9th