DK177073B1

DK177073B1 - Spread claw

Info

Publication number: DK177073B1
Application number: DKPA200701227A
Authority: DK
Inventors: Per Jensen; Nikolaj H Jensen
Original assignee: Schneider Electric Danmark As
Priority date: 2007-08-29
Filing date: 2007-08-29
Publication date: 2011-06-14
Also published as: WO2009027469A1; EP2193583A1; DK200701227A

Abstract

En spredeklo (1) til elektrisk installationsmateriel (5) og omfattende en spæn deplade (2) med et frihul (3) til optagelse af en skrue (4), således at spænde- pladen (2) er drejelig omkring en mod det elektriske installationsmateriel (5) vendende bagkant (6) og understøttet i en fordybning. Der tilvejebringes en møtrik (9) til at optage skruen (4) og til indgreb med et fremspring (13) på spredekloen (1) i afstand fra bagkanten (6), således at spredekloen (1)træk- kes af sidevæggen, når skruen skrues baglæns.A spreading claw (1) for electrical installation material (5) and comprising a clamping plate (2) with a free hole (3) for receiving a screw (4), so that the clamping plate (2) is rotatable about one towards the electrical installation material (5) facing rear edge (6) and supported in a recess. A nut (9) is provided for receiving the screw (4) and for engaging a projection (13) on the spreading claw (1) at a distance from the trailing edge (6), so that the spreading claw (1) is pulled off the side wall when the screw screwed backwards.

Description

DK 177073 B1DK 177073 B1

SpredekloSpread claw

Opfindelsen vedrører en spredeklo til elektrisk installationsmateriel til fastspænding af en indsats i en dåse, som har en sidevæg til samvirkning med 5 kloen, og hvor kloen er lejret i indsatsen og omfatter en spændeplade med et frihul til optagelse af en skrue, hvilken spændeplade er sammenhængende med kloben, som strækker sig udad fra spændepladen i retning mod indsatsens bund, og hvor der findes en møtrik under spændepladen til samvirkning med skruen, således at kloen tvinges ind i dåsens sidevæg, når 10 skruen skrues i én retning.The invention relates to a spreading claw for electrical installation material for clamping an insert in a can, which has a side wall for cooperating with the claw, and wherein the claw is mounted in the insert and comprises a clamping plate with a free hole for receiving a screw, which clamping plate is continuous with the claw extending outwardly from the clamping plate towards the bottom of the insert, and where there is a nut under the clamping plate for co-operation with the screw so that the claw is forced into the side wall of the can when the screw is screwed in one direction.

En sådan klo er kendt fra EP 1187285. Ulempen ved denne kendte teknik er, at der ikke findes midler til at trække kloen tilbage ved afmontering af det elektriske installationsmateriel.Such a claw is known from EP 1187285. The disadvantage of this known technique is that there are no means for retracting the claw when disassembling the electrical installation material.

1515

Fra DE 200 13 233 U1 kendes en klo med en returfunktion, som er tilvejebragt ved hjælp af en løs fjeder, som har flere ulemper. Det fordyrer produktet, jo flere løsdele, der skal samles, fjederen kan ruste eller have for lidt kraft til at trække kloen tilbage, hvis den med tiden har sat sig fast.From DE 200 13 233 U1 a claw is known with a return function which is provided by means of a loose spring which has several disadvantages. It makes the product more expensive, the more loose parts to be assembled, the spring can rust or have too little force to pull the claw back, if it has stuck over time.

2020

Alle de ovennævnte ulemper undgås ved blot at udføre kloen, som er kendt fra EP 1187285 med en returfunktion, som opnås ved at hængsle kloen i forhold til det elektriske installationsmateriel. Fjederen fra DE 200 13 233 U1 undgås, og man er altid sikker på at kunne frigøre kloen fra dens indgreb 25 med dåsen.All the above disadvantages are avoided by simply performing the claw, which is known from EP 1187285 with a return function, which is achieved by hinging the claw in relation to the electrical installation material. The spring from DE 200 13 233 U1 is avoided and you are always sure to be able to release the claw from its engagement 25 with the can.

Der kendes også andre konstruktioner, f.eks. som f.eks. er kendt fra de tyske patenter DE 40 28 766 og DE 197 54 644. Ved denne kendte teknik er spændeskruen indrettet til samvirkning med et gevind i indsatsen, og 30 spredekloen samvirker med en indsnævring under skruehovedet, således at spredekloens spidser kan påvirkes i retning ind mod og bort fra en sidevæg, 2 DK 177073 B1 som indsatsen skal monteres i. Denne kendte teknik har den ulempe, at undersiden af skruehovedet kommer til at samvirke med en skrå flade af spredekloen, således at skruen påvirkes sidelæns. Endvidere vil skruehovedet kunne bevæge sig. Begge disse forhold vanskeliggør 5 monteringsarbejdet, fordi skruetrækkeren er svær at fastholde i kærven.Other constructions are also known, e.g. such as. is known from the German patents DE 40 28 766 and DE 197 54 644. In this known technique the clamping screw is arranged to cooperate with a thread in the insert, and the spreading claw cooperates with a constriction under the screw head, so that the tips of the spreading claw can be influenced in the direction of towards and away from a side wall, 2 DK 177073 B1 in which the insert must be mounted. This known technique has the disadvantage that the underside of the screw head co-operates with an inclined surface of the spreading claw, so that the screw is actuated laterally. Furthermore, the screw head will be able to move. Both of these conditions complicate the assembly work because the screwdriver is difficult to hold in the notch.

Formålet med opfindelsen er at angive en spredeklo, hvor alle de ovennævnte ulemper er undgået.The object of the invention is to provide a spreading claw in which all the above-mentioned disadvantages are avoided.

Dette formål opnås ved, at spændepladen er hængslet til 10 installationsmateriellet, og at møtrikken har midler, der er indrettet til at samvirke med et fremspring på kloen i en afstand fra nævnte hængsling, således at kloen trækkes fri af sidevæggen, når skruen skrues i den modsatte retning.This object is achieved in that the clamping plate is hinged to the installation material and that the nut has means arranged to cooperate with a projection on the claw at a distance from said hinge, so that the claw is pulled free of the side wall when the screw is screwed into it. opposite direction.

15 Ved at anvende en møtrik, som kan påvirke spændepladen direkte, når indsatsen skal fastgøres, kan der opnås, at møtrikken samtidig kan skubbespredekloen fri af dåsens væg, når skruen skrues baglæns, fordi møtrikken samvirker med spredekloen i afstand fra den nævnte kant af spændepladen, som vender imod indsatsen, hvorved der tilvejebringes et 20 drejningsmoment, som påvirker spredekloen fri af dåsens væg. Disse fordele kan opnås samtidig med, at skruehovedets underside kan samvirke med en plan flade af indsatsen, og uden at skruen behøver at bevæge sig i længderetningen, hvorved det er væsentligt lettere at kunne styre skruetrækkeren under montage af indsatsen ifølge opfindelsen, end det har 25 kunnet opnås ved den kendte teknik.By using a nut which can directly affect the clamping plate when the insert is to be fastened, it can be achieved that the nut can at the same time push the spreading claw free of the wall of the can when the screw is screwed backwards, because the nut cooperates with the spreading claw at a distance from said clamping plate. , which faces the insert, thereby providing a torque which acts on the spreading claw free of the can wall. These advantages can be obtained at the same time as the underside of the screw head can co-operate with a flat surface of the insert, and without the screw having to move in the longitudinal direction, whereby it is considerably easier to control the screwdriver during assembly of the insert according to the invention. could be obtained by the prior art.

Ved en udførelsesform har kloen form som et par kloben, som strækker sig forbi møtrikken på hver sin side af denne. Der findes flere måder, hvorpå møtrikken kan samvirke med spændepladen således, at kloen frigøres fra væg-30 gen, når skruen skrues baglæns. F.eks. kan møtrikken have mindst ét fremspring til samvirkning med et samvirkende fremspring på et kloben, men 3 DK 177073 B1 fortrinsvist findes der to par indbyrdes samvirkende fremspring på henholdsvis klobenene og spændepladen.In one embodiment, the claw has the shape of a pair of claws extending past the nut on either side thereof. There are several ways in which the nut can cooperate with the clamping plate so that the claw is released from the wall 30 when the screw is screwed backwards. For example. the nut may have at least one projection for cooperating with a cooperating projection on a claw, but 3 DK 177073 B1 preferably there are two pairs of mutually cooperating projections on the claws and the clamping plate, respectively.

Møtrikken kan også være bukket rundt til samvirkning med den bort fra 5 nævnte kant vendende side af spændepladen, eller armene kan have et par mod hinanden vendende fremspring med en indbyrdes afstand således, at møtrikkens frigang er begrænset mellem fremspringene og spændepladens mod indsatsens bund vendende side.The nut may also be bent around for co-operation with the side of the clamping plate facing away from said edge, or the arms may have a pair of mutually facing projections at a mutual distance such that the clearance of the nut is limited between the projections and the clamping plate facing the bottom of the insert. .

10 I stedet for at kloen omfatter et par kloben, kan den være udformet som en plade, som strækker sig ud fra spændepladen i afstand fra den mod nævnte kant på spændepladen og strækker sig i retning mod indsatsens bund. Spredekloen kan også have andre udformninger, og det er således inden for opfindelsens rammer at give møtrik, spændeplade og klo en sådan 15 udformning, at møtrikken kan samviri^e med spændepladen og/eller kloen og påvirke kloen til bevægelse bort fra dåsens væg, når skruen skrues baglæns.Instead of the claw comprising a pair of claws, it may be formed as a plate which extends from the clamping plate at a distance from the said edge of the clamping plate and extends towards the bottom of the insert. The spreading claw can also have other designs, and it is thus within the scope of the invention to give the nut, clamping plate and claw such a design that the nut can coexist with the clamping plate and / or the claw and influence the claw to move away from the wall of the can when the screw is screwed backwards.

Opfindelsen vil blive nærmere forklaret ved den følgende beskrivelse af nogle udførelsesformer, idet der henvises til tegningen, hvor 20 fig. 1 perspektivisk viser en indsats med en udførelsesform for en spredekio ifølge opfindelsen, fig. 2A og 2B viser perspektivisk detaljer ved den på fig. 1 viste 25 udførelsesform for spredekloen, fig. 3A og 3B viser detaljer, hvorledes en udførelsesform for spredekloen samvirker med indsatsen, mens 30 fig. 4-7 viser andre udførelsesformer for spredekloen ifølge opfindelsen.The invention will be explained in more detail by the following description of some embodiments, with reference to the drawing, in which fig. 1 shows in perspective an insert with an embodiment of a spreading eco according to the invention, fig. 2A and 2B show perspective details of the device shown in FIG. 1 shows an embodiment of the spreading claw, fig. 3A and 3B show details of how an embodiment of the spreading claw cooperates with the insert, while fig. 4-7 show other embodiments of the spreading claw according to the invention.

ί 4 DK 177073 B1ί 4 DK 177073 B1

Opfindelsen er beregnet til elektrisk installationsmateriel, specielt af den art, hvor en indsats skal kunne fastspændes i en dåse, f.eks. i en væg eller et loft. Indsatsen kan omfatte stikkontakter, afbrydere eller andet installationsmateriel, som ikke er begrænsende for opfindelsen.The invention is intended for electrical installation material, especially of the kind in which an insert must be able to be clamped in a can, e.g. in a wall or ceiling. The insert may comprise sockets, switches or other installation material which are not limiting of the invention.

55

Den på fig. 1 viste indsats 5 har en spredeklo i to modstående sider, hvor kun spredekloen i den ene side er vist på figuren. Spredekloen 1 omfatter en spændeplade 2, der er sammenhængende med et par kloben 11, som for enderne har fremspringende spidser 8. Spændepladen 2 har et frihul 3 til 10 opta- gelse af en skrue 4, hvis gevind samvirker med et gevind i en møtrik 9. Møtrikken 9 har fremspringet 12 til samvirkning med et fremspring 13 på klobenene 11.The one in fig. 1 has a spreading claw on two opposite sides, where only the spreading claw on one side is shown in the figure. The spreading claw 1 comprises a clamping plate 2, which is connected to a pair of claws 11, which at the ends have projecting tips 8. The clamping plate 2 has a free hole 3 to 10 receiving a screw 4, the thread of which cooperates with a thread in a nut 9 The nut 9 has the projection 12 for cooperating with a projection 13 on the claws 11.

Endvidere har spændepladen 2 en bagkant 6, der er indrettet til at kunne 15 optages i en fordybning i indsatsen, således som det vil blive nærmere forklaret nedenfor. Fig. 2A og 2B viser spredekloen i to forskellige stillinger.Furthermore, the clamping plate 2 has a trailing edge 6, which is arranged to be able to be received in a recess in the insert, as will be explained in more detail below. FIG. 2A and 2B show the spreading claw in two different positions.

Det bemærkes, at spændeskruen 4 ved den foretrukne udførelsesform er fikseret mod aksial bevægelse i indsatsen 5. Når skruen 4 skrues med uret (pilen P1), vil den trække møtrikken 9 opad, hvorved kloen 1 tvinges udad, 20 fordi bagkanten 6 er lejret i en fordybning 7 i indsatsen.It is noted that in the preferred embodiment the clamping screw 4 is fixed against axial movement in the insert 5. When the screw 4 is screwed clockwise (arrow P1), it will pull the nut 9 upwards, thereby forcing the claw 1 outwards, 20 because the rear edge 6 is mounted in a recess 7 in the insert.

Når skruen 4 skrues baglæns (pilen P2), vil møtrikken 9 blive presset nedad (fig. 2B), og møtrikken 9’s fremspring 12 påvirke fremspringene 13 således, at klobenene 11 tvinges bort fra væggen af den dåse, som indsatsen 5 er 25 anbragt i.When the screw 4 is screwed backwards (arrow P2), the nut 9 will be pressed downwards (Fig. 2B), and the projections 12 of the nut 9 act on the projections 13 so that the claws 11 are forced away from the wall of the can in which the insert 5 is placed. .

Dette kan ses i nærmere detaljer i fig. 3A og 3B, hvor møtrikken 9 er vist i indgreb med spændepladen 2. Endvidere bemærkes en fordybning 17 i indsatsen til optagelse af den tidligere nævnte kant 6, således at spændepla-30 dens kloben drejer omkring nævnte kant, når møtrikken påvirker spændepladen 2 via de hosliggende fremspring 12.This can be seen in more detail in fig. 3A and 3B, where the nut 9 is shown in engagement with the clamping plate 2. Furthermore, a recess 17 is noted in the insert for receiving the previously mentioned edge 6, so that the clamp of the clamping plate 30 rotates around said edge when the nut acts on the clamping plate 2 via the adjacent projections 12.

PP

5 DK 177073 B15 DK 177073 B1

Fig. 4 viser en modificeret udførelsesform for spredekloen, hvor spændepla-den 2 har et fremspring 14 til samvirkning med et hul 21 i en møtrik 17. Det vil umiddelbart kunne forstås, at møtrikken 17 på denne måde kan tvangssty-5 re spændepladen 2 og de dermed sammenhængende kløer.FIG. 4 shows a modified embodiment of the spreading claw, where the clamping plate 2 has a projection 14 for co-operation with a hole 21 in a nut 17. It will be immediately understood that the nut 17 can in this way forcibly control the clamping plate 2 and the continuous claws.

Fig. 5 viseren yderligere udførelsesform, hvor kloerne er forsynet med et par fremspring 15, som vender mod hinanden, og hvor den tilhørende møtrik 18 er udformet med modsvarende aflange fremspring 20 således, at der også 10 opnås den nævnte tvangsstyring, På fig. 6 er fremspringene 14 fra fig. 5 erstattet af nogle aflange indbukninger 25, og det vil umiddelbart kunne forstås, hvorledes møtrikken 22 vil kunne tvangsstyre kloerne.FIG. Fig. 5 shows a further embodiment, in which the claws are provided with a pair of projections 15, which face each other, and in which the associated nut 18 is formed with corresponding elongate projections 20 so that the said forced guide is also obtained. In fig. 6, the projections 14 of FIG. 5 replaced by some elongated dents 25, and it will be immediately understood how the nut 22 will be able to forcibly steer the claws.

1515

Opfindelsen er ikke begrænset til, at spredekloen omfatter et par kloben. Fig.The invention is not limited to the spreading claw comprising a pair of claws. FIG.

7 viser en udførelsesform, hvor spændepladen 2 er sammenhængende med en ombukket arm 16, sam har et par fremspringende spidser 19. Den tilhørende møtrik 20 23 har fremspring 24, som, når delene er monteret, strækker sig ind over spændepladen 2 og således trækker denne nedad og dermed trækker spidserne 19 fri af dåsens væg, når skruen 4 skrues baglæns.7 shows an embodiment in which the clamping plate 2 is continuous with a folded arm 16, which has a pair of projecting tips 19. The associated nut 20 23 has projections 24 which, when the parts are mounted, extend over the clamping plate 2 and thus pull it downwards and thus the tips 19 pull free of the wall of the can when the screw 4 is screwed backwards.

2525

Claims

Spreading claw for electrical installation material for clamping an insert in a can, which has a side wall for cooperating with the claw, and wherein the claw is mounted in the insert and comprises a clamping plate (2) with a free hole (3) for receiving a screw (4), which clamping plate is continuous with the claw (11), which extends outwards from the clamping plate towards the bottom of the insert, and where there is a nut (9) under the clamping plate for co-operation with the screw (4), so that the claw is forced in in the side wall of the can, 10 when the screw is screwed in one direction, characterized in that the clamping plate (2) is hinged (7) to the installation material and that the nut (9) has means adapted to cooperate with a projection (13) on the claw at a distance from said hinge (7) so that the claw is pulled free by the side wall when the screw is screwed in the opposite direction. 15

Spreading echo according to claim 1, characterized in that the clamping plate (2) is rotatable about an edge (6) facing the insert (5), which is hinged (7) in the insert.

Spreading claw according to claim 1 or 2, characterized in that the claw has legs in the form of a pair of arms which extend past the nut on each side thereof.

Spreading claw according to claim 3, characterized in that the nut has at least one projection (12) for co-operation with a corresponding projection (13) on a 25 arm.

Spreading claw according to claim 4, characterized in that the nut has two projections (12) for co-operation with respective projections (13) on the arms at a distance from said edge (6) of the clamping plate. 30 7 DK 177073 B1

Spreading claw according to claim 3, characterized in that the clamping plate (2) is continuous with a folded arm (16) at a distance from said edge (6).

Spreading claw according to claim 3, characterized in that the claws have a pair of 5 facing projections (15) at a mutual distance such that the clearance of the nut (18) is limited between the projections (15) and the clamping plate against the insert. bottom facing side.

Spreading claw according to claims 3-7, characterized in that the claws have tips (8, 10 19) for co-operation with the side wall of the can. 15