NO117927B

NO117927B -

Info

Publication number: NO117927B
Application number: NO168670A
Authority: NO
Inventors: J Lescarboura
Original assignee: Telemecanique Electrique
Priority date: 1966-06-21
Filing date: 1967-06-20
Publication date: 1969-10-13
Also published as: CH462273A; ES342121A1; NL6708489A; DE1274711B; NL154879B; US3464055A; GB1163066A; AT281951B; FR92460E; BE699496A; DK123325B; SE351324B; LU53836A1

Description

Kontaktklemme for elektrisk leder. Contact clamp for electrical conductor.

Den foreliggende oppfinnelse vedrorer en kontaktklemme for elektrisk leder omfattende et hus i hvilket innforingsretningen for de ledninger som skal låses, danner en spiss vinkel med låseskruens akse. The present invention relates to a contact clamp for electrical conductors comprising a housing in which the direction of insertion of the wires to be locked forms an acute angle with the axis of the locking screw.

På grunn av tendensen til miniatyrisering av elektriske apparater blir kontaktklemmene ofte for plasskrevende da det i hittil kjente forgreningsanordninger som opptar ledere, forefinnes to på hverandre perpendikulære innfbringer, hvorav den ene er for skrutrekkeren og den andre for den ledning som skal avgrenes. Man har allerede rettet på denne mangel ved å foreslå ledninger som låses med en låsekile med liten vinkel, forsynt med en gjennomgående skrue som skyver kilen inn i sitt leie og på ledningen således låser lederen mellom den ene av kilens sider og en tilsvarende vegg. I disse kjente klemmer er kilen kompakt, og skruen forloper inn i et gjengeparti i bunnen av ledningsleiet. Denne konstruksjon i hvilken en metallblpkk glir i en annen, krever noyaktig maskinering. Når klemmens dimensjoner er små, er det vanskelig å foreta gjenging i bunnen av ledningsleiet. Ved monteringen er det heller ikke lett å innfore kilen med skruen. Man har også foreslått å erstatte låsekilen med en fleksibel lamell med form av en sirkelbue, hvilken lamell av skruehodet trykkes mot bunnen av leiet. Men i dette tilfelle blir lamellens låsevirkning på ledningen dårlig, og ledningen blir ikke fastholdt mot en plan flate i hele den disponible lengde. Due to the tendency towards the miniaturization of electrical devices, the contact terminals often become too space-consuming, as in previously known branching devices that accommodate conductors, there are two mutually perpendicular insertions, one of which is for the screwdriver and the other for the wire to be branched off. This shortcoming has already been rectified by proposing cables that are locked with a locking wedge with a small angle, provided with a through screw that pushes the wedge into its bearing and on the cable the conductor thus locks between one of the sides of the wedge and a corresponding wall. In these known clamps, the wedge is compact, and the screw extends into a threaded portion at the bottom of the cable bed. This construction, in which one metal block slides into another, requires precise machining. When the dimensions of the clamp are small, it is difficult to thread at the bottom of the cable tray. During assembly, it is also not easy to insert the wedge with the screw. It has also been proposed to replace the locking wedge with a flexible lamella in the shape of a circular arc, which lamella is pressed against the bottom of the bearing by the screw head. But in this case, the lamella's locking effect on the cord is poor, and the cord is not held against a flat surface throughout its available length.

Et formål med oppfinnelsen er å eliminere disse ulemper. An object of the invention is to eliminate these disadvantages.

Dette oppnås ifolge oppfinnelsen ved en klemme av innledningsvis nevnte art som kjennetegnes ved at huset er forsynt med en utsparing med to indre parallelle vegger med gjengede og sentrerende partier for låseskruen og at utsparingen oppviser en indre flate som danner en spiss vinkel med aksen for låseskruen som på i og for seg kjent måte mot denne flate presser en metallboyle, idet boylen har en kileflate forlopende parallelt med husets skrå flate, mellom hvilke flater lederen fastklemmes. This is achieved according to the invention by a clamp of the type mentioned at the outset which is characterized by the fact that the housing is provided with a recess with two internal parallel walls with threaded and centering parts for the locking screw and that the recess has an inner surface which forms an acute angle with the axis of the locking screw which in a manner known per se against this surface, a metal coil presses, as the coil has a wedge surface running parallel to the inclined surface of the housing, between which surfaces the conductor is clamped.

Andre trekk og fordeler ved oppfinnelsen vil fremgå av neden-stående beskrivelse av utforelseseksempler. under henvisning til tegningene, hvor Other features and advantages of the invention will be apparent from the below description of exemplary embodiments. with reference to the drawings, where

fig. 1 viser et oppriss av klemmens tre viktigste deler, skilt fig. 1 shows an elevation of the clamp's three most important parts, separated

fra hverandre, idet huset er vist i lengdesnitt, from each other, the house being shown in longitudinal section,

fig. 2 viser en klemme sett fra siden, fig. 2 shows a clamp seen from the side,

fig. 3 viser den samme klemme sett forfra, fig. 3 shows the same clamp seen from the front,

fig. 4 viser et snitt efter linjen IV-IV i fig. 3 sett ovenfra, fig. 4 shows a section along the line IV-IV in fig. 3 seen from above,

fig. 5 viser et lengdesnitt av to klemmer anbragt i en bryter fig. 5 shows a longitudinal section of two clamps arranged in a switch

eller lignende, etc,

fig. 6 viser en annen utforelsesform for oppfinnelsen, hvorved en låseskrue er vist i oppriss og huset er vist i lengdesnitt efter linjen I-l i fig. 8, fig. 6 shows another embodiment of the invention, whereby a locking screw is shown in elevation and the housing is shown in longitudinal section along the line I-1 in fig. 8,

fig. 7 viser huset sett ovenfra, fig. 7 shows the house seen from above,

fig. 8 viser klemmen sett fra siden, og fig. 8 shows the clamp seen from the side, and

fig. 9 viser metallplaten for bretting til dannelse av huset. fig. 9 shows the sheet metal for folding to form the housing.

Den i fig. 1 viste utformning omfatter hovedsakelig tre deler, en skrue 1 med hode la, et frisnitt lb og en spiss lc - en låse-boyle 2 dannet av et metallbånd - og et slisset metallhus 3 med U-formet tverrsnitt som vist i fig. 4. The one in fig. The design shown in 1 mainly comprises three parts, a screw 1 with a head 1a, a free cut 1b and a tip lc - a locking boyle 2 formed from a metal band - and a slotted metal housing 3 with a U-shaped cross-section as shown in fig. 4.

Låseboylen 2 omfatter en krave 4 som kan dannes av to åpne halvdeler som så presses rundt skruens innsnevrede parti lb. The locking bolt 2 comprises a collar 4 which can be formed from two open halves which are then pressed around the screw's narrowed part lb.

Kraven 4 er forbundet med en vinkelformet boyle med en gren 5 og en gren 6, idet det i boylens frie ende forefinnes en hel 6a. Avstanden mellom kraven 4 og helen 6a svarer til avstanden mellom frisnittet lb og skruens koniske spiss lc. Skruen 1 og boylen 2 har en bredde som passer til innforing i husets 3 sliss 7, og husets grener 8 har på innerflatene 8a og 8b gjengepartier 9a og 9b. Husets grener er i bakkant forbundet ved en skrå vegg 10 som med gjengeaksen danner en spiss vinkelo( på 30°. Grenen 6 på boylen 2 bor utformes med tilsvarende forlop. Grenene 5 og 6 har rektangulært tverrsnitt slik at de med kun liten friksjon passerer i slissen 7, mens helen 6a på samme måte glir i slissen foran gjengepartiene. The collar 4 is connected by an angular boyle with a branch 5 and a branch 6, as there is a whole 6a at the free end of the boyle. The distance between the collar 4 and the heel 6a corresponds to the distance between the free cut lb and the conical tip lc of the screw. The screw 1 and the boylen 2 have a width suitable for insertion into the slot 7 of the housing 3, and the housing's branches 8 have threaded portions 9a and 9b on the inner surfaces 8a and 8b. The housing's branches are connected at the back by an inclined wall 10 which with the axis of the thread forms an acute angle o( of 30°. The branch 6 on the boylen 2 is designed with a corresponding course. The branches 5 and 6 have a rectangular cross-section so that they pass with only little friction in the slot 7, while the heel 6a slides in the same way in the slot in front of the threaded parts.

Bunnen av slissen 7 og boylens gren 6 danner således et kammer 7a (fig. 3) som med låseskruens akse danner en spiss vinkel. Inn i dette kan man langs flaten 11 eller 12 innfore de ledere 21 og 22 som skal forbindes. The bottom of the slot 7 and the boylen's branch 6 thus form a chamber 7a (fig. 3) which forms an acute angle with the axis of the locking screw. Into this, the conductors 21 and 22 to be connected can be inserted along the surface 11 or 12.

I fig. 5 er i snitt vist en klemme ifolge oppfinnelsen anvendt i et elektrisk apparat som f.eks. en stikkontakt, en transfor-mator osv. Det fundament i hvilket klemmen er anbragt, består av isolasjonsmateriale og kan på vanlig måte omfatte flere deler med sammenfoyninger slik at det dannes utsparinger i hvilke klemmen kan anbringes. Fundamentet kan for eksempel utgjores av to symmetriske stopte stykker forbundet med skruer gjennom hull 14. In fig. 5 shows a cross section of a clamp according to the invention used in an electrical device such as e.g. a socket, a transformer, etc. The foundation in which the clamp is placed consists of insulating material and can normally include several parts with joints so that recesses are formed in which the clamp can be placed. The foundation can, for example, be made of two symmetrical butted pieces connected by screws through holes 14.

Huset 3 holdes i sitt leie av låseelementet 16, idet de stopte partier har tre passasjer 17, 18 og 19. Passasjen 17 tjener til innforing av en leder og danner en vinkel på 30° med skruens akse, passasjen 19 tjener til innforing av en leder 21 som tjener til å holde klemmen fast i fundamentet. Lederen 21 forsynes fordelaktig med en fortanning 21a på den flate som ligger an mot lederen som skal klemmes fast. Passasjen 18 tillater innforing av skrutrekker for tiltrekking av låseskruen. Det ses at det parti av fundamentet som skiller åpningene 18 The housing 3 is held in its position by the locking element 16, the stopped parts having three passages 17, 18 and 19. The passage 17 serves for the insertion of a conductor and forms an angle of 30° with the axis of the screw, the passage 19 serves for the insertion of a conductor 21 which serves to hold the clamp firmly in the foundation. The conductor 21 is advantageously provided with a serration 21a on the surface which abuts the conductor to be clamped. The passage 18 allows the insertion of a screwdriver for tightening the locking screw. It can be seen that the part of the foundation that separates the openings 18

og 20, tjener som anslag 20a for boylens gren 5. Skruen kan således ikke skrus ut av sine gjenger og således gå tapt. Fundamentet omfatter videre en utsparing 13 som tillater full-stendig anlegg av pressboylen mot den tannede leder 21. and 20, serves as stop 20a for the boylen's branch 5. The screw cannot thus be unscrewed from its threads and thus be lost. The foundation further includes a recess 13 which allows the press boiler to be fully seated against the toothed guide 21.

En variant av klemmen ifolge oppfinnelsen kan gi en ennå bedre fastklemming og en konstruktiv fordel. I den ovenfor beskrevne utformning må det anbringes to gjengepartier på innerflåtene av et U-formet element. Dette er komplisert, idet U-elementets grener er tilboyelige til å boye seg utad. Man kunne tenke seg med en matrise å fremstille et plant stykke med de to gjengepartier preget, og så brette det, men nøyaktigheten ved en slik operasjon blir usikker. A variant of the clamp according to the invention can provide even better clamping and a constructive advantage. In the design described above, two threaded parts must be placed on the inner rafts of a U-shaped element. This is complicated, as the branches of the U-element are prone to bending outwards. One could imagine using a matrix to produce a flat piece with the two threaded sections embossed, and then fold it, but the accuracy of such an operation becomes uncertain.

Hvis man i en anordning med pressboyle som glir i en slisset blokk, tvinger låseskruen inn, kan grenene åpne seg slik at skruen slipper gjengene. If, in a device with a press boyle that slides in a slotted block, the locking screw is forced in, the branches can open so that the screw releases the threads.

Ifolge en foretrukken utforelsesform utgjores klemmen av et prismeformet hus med to parallelle flater som forbindes av en tredje og en fjerde flate, idet hver av de to innbyrdes parallelle flater har et stotte- eller holdeparti som sammen med et gjenget parti i sideflaten 3 danner konsentriske foringsorgan for skruen. Skruen trekker mellom hodet og enden med et metallbånd i form av en boyle som omfatter et låseparti som danner en vinkel med skruens akse. Låsepartiet ligger nærmest den fjerde flate og forloper parallelt med dette. According to a preferred embodiment, the clamp is made of a prism-shaped housing with two parallel surfaces which are connected by a third and a fourth surface, each of the two mutually parallel surfaces having a support or holding part which, together with a threaded part in the side surface 3, forms concentric lining means for the screw. The screw pulls between the head and the end with a metal band in the form of a boyle which includes a locking part that forms an angle with the axis of the screw. The locking part is closest to the fourth surface and runs parallel to it.

Huset utgjores av en utstanset metallplate som brettes og lukkes slik at den danner en prismeformet trakt som er åpen i begge ender. Med fordel kan de brettede og sammenfbyde ender som utgjor den fjerde flate forsynes med spesielle sammenfoynings-organ. Et hvert annet middel som f.eks. sveising kan også brukes. The housing is made of a punched metal sheet which is folded and closed so that it forms a prism-shaped funnel which is open at both ends. Advantageously, the folded and joined ends which make up the fourth surface can be provided with special joining means. Every other means such as e.g. welding can also be used.

Av fig. 6 fremgår at skruen 1 med sin boyle 5 befinner seg i samme låseforhold for ledningene 21 og 22 som i den forste beskrevne utformning. Av fig. 7 ses at skruen 1 er sentrert mellom de innboyde flater 24a og 24b og en sylindérflate 25 på veggen 29. Sylinderflaten 25 har et gjengeparti 25a. Partiene 24a og 26a fås ved innstansing av veggen 28. From fig. 6 shows that the screw 1 with its bolt 5 is in the same locking position for the wires 21 and 22 as in the first described design. From fig. 7 it can be seen that the screw 1 is centered between the recessed surfaces 24a and 24b and a cylindrical surface 25 on the wall 29. The cylindrical surface 25 has a threaded portion 25a. The parts 24a and 26a are obtained by punching the wall 28.

Den skrå flate 31 er parallell med boylens parti 6 og omfatter korrugeringer 27 hvis funksjon skal forklares i det folgende. The inclined surface 31 is parallel to the boylen's part 6 and includes corrugations 27 whose function will be explained in the following.

Fig. 9 viser den metallplate som ved bretting gir det trakt-formede hus 30. De. stiplede linjer angir hvor brettingen ut-fores. Flaten 31 dannes ved de to partier ytterst på platen, hvilke partier hver er forsynt med,utskjæringer i form av en dobbelt svalehale 32a, 33a, hhv. 32b og 33b. Disse danner det nevnte sammenfbyningsmiddel som utgjor den fjerde flate. Videre avstiver korrugeringene 27 flaten 31 og forbedrer sammenfby-ningen. Fig. 9 shows the metal plate which, when folded, gives the funnel-shaped housing 30. De. dashed lines indicate where the fold is lined out. The surface 31 is formed by the two parts at the far end of the plate, which parts are each provided with cutouts in the form of a double dovetail 32a, 33a, respectively. 32b and 33b. These form the aforementioned joining agent which forms the fourth surface. Furthermore, the corrugations 27 stiffen the surface 31 and improve the joining.

Av fig. 6 og 7 ses at stbtteflåtene 24a og 24b og gjengeflaten 25a danner foring for skruen. From fig. 6 and 7, it can be seen that the support rafts 24a and 24b and the threaded surface 25a form a lining for the screw.

Denne utformning av klemmen passer for massefabrikasjon. Den This design of the clamp is suitable for mass production. It

gir også mulighet for meget enkel og god fastklemming av lederen. also allows for very simple and good clamping of the conductor.

Oppfinnelsen er ikke begrenset til de beskrevne utformninger, The invention is not limited to the described designs,

idet den f.eks. kan fremstilles ved stoping. Ved anvendelse av ledere som oppviser en viss stivhet, kan man sloyfe nevnte anslag 20a (fig. 5), og blokken kan slisses slik at den tillater innforing av ledningen gjennom en sliss, idet skruen og press- since it e.g. can be produced by stopping. When using conductors that exhibit a certain stiffness, the aforementioned stop 20a (fig. 5) can be loosened, and the block can be slotted so that it allows the cable to be inserted through a slot, as the screw and press-

boylen derefter anbringes på plass. Oppfinnelsen kan generelt anvendes ved alle typer klemmer som omfatter de ovenfor nevnte grunnelementer. the boyle is then placed in place. The invention can generally be used for all types of clamps that include the above-mentioned basic elements.

Claims

1. Contact clamp for electrical conductor comprising a housing in which the direction of insertion of the wires to be locked, forms an acute angle with the axis of the locking screw, characterized in that the housing (3, 30) is provided with a recess with two inner parallel walls (8a, 8b) with threaded and centering parts (9a, 9b, 24a, 24b, 25) for the locking screw and that the recess exhibits an inner surface (10, 31) which forms an acute angle with the axis of the locking screw which presses against this surface in a manner known per se a metal coil (5), the coil having a wedge surface (6) running parallel to the inclined surface of the housing, between which surfaces the conductor is clamped.

2. Contact clamp as specified in claim 1, characterized in that the housing is slotted lengthwise to form a element (8) with a U-shaped cross-section, that the threaded parts (9a, 9b) are opposite each other on the inner rafts of the branches. (8a, 8b) and that the bottom of the housing has the furthest distance from the screw at the end of the housing where the screw lined in.

3. Contact clamp as stated in claim 1, characterized in that the housing is prism-shaped (30) with two parallel surfaces (28a, 28b) which on the inside have lining parts (24a, 24b) for the screw and that a surface (29) which connects the two former surfaces, on the inside of the housing has a threaded part (25a) so that the lining and threaded parts thereby determine the insertion of the screw into the block.

4. Contact clamp as specified in claim 3, characterized in that the housing is made of a metal plate which is cut out and folded so that a prism-shaped funnel is formed.

5. Contact clamp as stated in claims 3 and 4, characterized in that joining of the free end parts of the housing is achieved by dovetail hooking (32a, 32b).

6. Contact clamp as specified in claims 3 and 4, characterized in that the surface (31) in which the joint is located is provided with reinforcing wave corrugation (27).

7. Contact clamp as specified in claim 1, characterized in that the metal coil is brought along by parts at its ends, in which parts sections of the screw turn.

8. Contact clamp as specified in claim 7, characterized in that the screw has a narrowed cylindrical part under the head (lb) and is conical at the opposite end (lc).

9. Contact clamp as specified in claims 7 and 8, characterized in that the metal coil is terminated by a hook (6a) which grips the screw's conical end (lc).

10. Contact clamp as specified in claims 7 and 8, characterized in that the metal coil is attached to the narrowed part of the screw by means of an open ring (4) folded around this part.

11. Contact terminal as stated in claim 1 and 2 or 3, characterized in that it is inserted into a connection base for an electrical device, said base behind the contact clamp is provided with an opening (19) for placing a fastening means (21) for the clamp and; in front of the clamp two openings, one of which (18) lies in the extension of the screw and the other (17) forms an acute angle with: the screw axis and serves for inserting the conductor.