NO790126L

NO790126L - HAND TOOLS FOR WIRING WIRE

Info

Publication number: NO790126L
Application number: NO790126A
Authority: NO
Inventors: Karl-Henning Larsson
Original assignee: Larsson Karl Henning
Priority date: 1978-01-16
Filing date: 1979-01-15
Publication date: 1979-07-17
Also published as: SE429590B; SE7800498L; EP0008575A1; FI790136A7; WO1979000511A1; PL212813A1

Description

Håndverktøy for trekking av ledninger.Hand tool for pulling wires.

Foreliggende oppfinnelse vedrører et håndverktøy bestående av to i forhold til hverandre leddbart forbundne klerastykker, beregnet på ved trekking av ledninger og/eller tråder ved hjelp av trekkfjærer eller lignende å gripe den i dette innførte trekkfjær for i form av et gripehåndtak for en installatør å lette fjærens innskyvning i respektive uttrekking av en trang passasje, slik som i et rør. The present invention relates to a hand tool consisting of two relative to each other articulatingly connected pieces of clothing, intended for when pulling wires and/or threads with the help of tension springs or the like to grip the tension spring introduced in this in order in the form of a grip handle for an installer to facilitate the insertion of the spring into the respective extraction of a narrow passage, such as in a pipe.

Når ledningstråder trekkes gjennom rør, er det meget vanlig at en trekkfjær anvendes. Denne består normalt av et forholdsvis stivt flatt og i normal tilstand sammenrullet metallbånd, som ved anvendelse føres gjennom røret og i den ene ende sammen-kobles med den aktuelle ledningstråd - f.eks. en elektrisk leder - som derpå lett kan trekkes frem gjennom røret ved trekkfjærens tilbakeføring. Ofte kan det imidlertid være besværlig både å føre trekkfjæren inn gjennom røret og derpå å trekke den til-bake. På grunn av fjærens form - flat og relativt stiv - er det dessuten vanskelig å få et ordentlig grep om denne med hånden. Hånden kan også lett skades når man forsøker å presse eller trekke fjæren altfor kraftig. For å oppnå et bedre grep om fjæren, er' det derfor vanlig at man anvender en tang, f.eks. en kombinasjonstang eller en avbiter. Tangen kan imidlertid lett gli, og den kan også bevirke skader i form av grader eller lignende på selve trekkfjæren. Derved økes risikoen for håndskader når fjæren senere igjen håndteres manuelt. When wires are pulled through pipes, it is very common for a tension spring to be used. This normally consists of a relatively rigid, flat and in normal state rolled up metal band, which when used is passed through the pipe and connected at one end to the relevant wire - e.g. an electrical conductor - which can then be easily pulled forward through the tube by the return of the tension spring. Often, however, it can be difficult both to insert the tension spring through the pipe and then to pull it back. Due to the spring's shape - flat and relatively stiff - it is also difficult to get a proper grip on it with your hand. The hand can also be easily injured when you try to push or pull the spring too strongly. To achieve a better grip on the spring, it is therefore common to use pliers, e.g. combination pliers or a cutter. However, the pliers can easily slip, and it can also cause damage in the form of burrs or the like to the tension spring itself. This increases the risk of hand injuries when the spring is later handled manually.

Hovedformålet med oppfinnelsen er å tilveiebringe et håndverktøy som er spesielt utformet for å passe i forbindelse med lednings-trekking av det i innledningsavsnittet nevnte slag. Det bør da være lett å anbringe verktøyet, slik at det kan gripe trekkfjæ-jren enten ved én av fjærendene eller ved et parti mellom endene. The main purpose of the invention is to provide a hand tool which is specially designed to fit in connection with cable pulling of the type mentioned in the introductory section. It should then be easy to place the tool, so that it can grip the tension spring either at one of the spring ends or at a part between the ends.

Et håndverktøy av det foran angitte slag skal ifølge oppfinnel-!According to the invention, a hand tool of the type specified above must!

i sen først og fremst kjennetegnes ved at et til fjæren avpasset rom avgrenses mellom klemstykkene i deres lengderetning, når de presses mot hverandre, idet de deler av klemstykkene som griper fjæren og holder den fast ved klemstykkenes pressing fra motsatte sider, befinner seg mellom leddet og området for en hånd som utøver presskraften. in the latter is primarily characterized by the fact that a space adapted to the spring is delimited between the clamping pieces in their longitudinal direction, when they are pressed against each other, as the parts of the clamping pieces that grip the spring and hold it firmly when the clamping pieces are pressed from opposite sides are located between the joint and the area of a hand that exerts the pressure force.

Klemstykkene bør fortrinnsvis være frigjørbart sammenføyet, slik at fjæren efter ønske kan innføres mellom disse enten når de er sammenføyet eller når de er skilt fra hverandre. Det er for-delaktig å anvende en lenke som binder klemstykkene sammen slik at klemstykkene, til tross for at de er frigjørbare, allikevel vil bli håndtert sammen. The clamping pieces should preferably be releasably joined, so that the spring can be introduced between them as desired either when they are joined or when they are separated from each other. It is advantageous to use a link which binds the clamping pieces together so that the clamping pieces, despite being releasable, will still be handled together.

Oppfinnelsen skal nu beskrives nærmere nedenfor i form av et foretrukket utførelseseksempel under henvisning til den på tegningen viste fxgur. The invention will now be described in more detail below in the form of a preferred embodiment with reference to the diagram shown in the drawing.

Det på tegningen som eksempel viste håndverktøy omfatter to klemstykker 10 og 12. Klemstykket 10 utgjøres av en langstrakt, forholdsvis flat del 14 som er innførbar i et spor 16, hvilket avgrenses mellom to sidevegger 18, 20 i klemstykket 12. De to klemstykker 10, 12 er leddbart sammenkoblingsbare med hverandre ved de fremre partiene. Således går en leddtapp 22 gjennom klemstykket 10 og rager med sine to ender 24, 26 ut på begge sider av klemstykket. Leddtappsendene 24, 26 er radielt innfør-bare i tilsvarende spor 28, 30 i klemstykkets 12 sidevegger 18, 20, og sporene 28, 30 har en slik utformning at leddtappsendene 24, 26 presses mot sporbunnene 32, 34, når en trykkraft utøves manuelt over klemstykkene 10, 12 ved den fra leddenden vendende verktøysdel. Sporene 28, 30 i sideveggene 18, 20 forløper paral-lelt og er, sett fra siden, noe krummet. Hvert spor strekker seg således fra den øvre kant 36 respektive 38 av klemstykkets 12 respektive sidevegger 18, 20 og i retning mot den bunndel 40 som sammenbinder sideveggene, for omtrent midt imellom den respektive øvre kant og bunndelen 40 å svinge av oppad-fremad. Når det sammenkoblede verktøy presses sammen, vil klemstykkets 10 kant 42 tvinges i retning mot klemstykkets 12 bunndel 40. En mellom, klemstykkene 10, 12 innført trekkfjær (ikke vist) eller lignende vil da effektivt gripes. The hand tool shown as an example in the drawing comprises two clamping pieces 10 and 12. The clamping piece 10 consists of an elongated, relatively flat part 14 which can be inserted into a groove 16, which is delimited between two side walls 18, 20 in the clamping piece 12. The two clamping pieces 10, 12 are articulately connectable to each other at the front parts. Thus, a joint pin 22 passes through the clamping piece 10 and projects with its two ends 24, 26 on both sides of the clamping piece. The joint pin ends 24, 26 can be radially inserted into corresponding grooves 28, 30 in the side walls 18, 20 of the clamping piece 12, and the grooves 28, 30 have such a design that the joint pin ends 24, 26 are pressed against the groove bottoms 32, 34, when a compressive force is applied manually over the clamping pieces 10, 12 at the tool part facing from the joint end. The grooves 28, 30 in the side walls 18, 20 run parallel and, seen from the side, are somewhat curved. Each track thus extends from the upper edge 36 and 38 of the respective side walls 18, 20 of the clamping piece 12 and in the direction towards the bottom part 40 which connects the side walls, so that approximately midway between the respective upper edge and the bottom part 40 swings off upwards-forwards. When the connected tool is pressed together, the edge 42 of the clamping piece 10 will be forced in the direction towards the bottom part 40 of the clamping piece 12. A tension spring (not shown) inserted between the clamping pieces 10, 12 or the like will then be effectively gripped.

Klemstykket 10 har, slik som antydet i figuren, langs en vesent-lig del av sin lengde et T-formet tverrsnitt, og klemstykket 12 har for styring relativt klemstykket 10 langs i det minste en del av sin tilsvarende lengde et til det T-formede tverrsnitt avpasset U-formet tverrsnitt. Begge klemstykkene 10, 12 er med for-del hovedsakelig fremstilt av nylon, men den fremre del av klemstykket 12 bør være forsterket med metalldeler - partiene 44, 46"■på tegningen - slik at tappendene 24, 26 bringes til anlegg mot metalldeler ved sporbunnene 32, 34. Metalldelene 44, 46 er fortrinnsvis festet ved hjelp av nagler 48, 50. Naglene 48, 50 strekker seg gjennom såvel metalldelene 44, 46 som de inntillig-gende sidevegger 18, 20. The clamping piece 10 has, as indicated in the figure, a T-shaped cross-section along a substantial part of its length, and the clamping piece 12 has for guidance relative to the clamping piece 10 along at least a part of its corresponding length one to the T-shaped cross-section adapted U-shaped cross-section. Both clamping pieces 10, 12 are advantageously mainly made of nylon, but the front part of the clamping piece 12 should be reinforced with metal parts - parts 44, 46"■ in the drawing - so that the pin ends 24, 26 are brought into contact with metal parts at the track bottoms 32, 34. The metal parts 44, 46 are preferably attached by means of rivets 48, 50. The rivets 48, 50 extend through both the metal parts 44, 46 and the adjacent side walls 18, 20.

En sammenholdende metallenke 52 er i endene festet til tilsvarende klemstykke 10, 12 - i tilknytning til leddtappen 22 respektive naglen 48. Derved vil klemstykkene 10, 12 alltid kunne håndteres sammen til tross for at de er løsgjørbare. Lenkens 52 lengde er ikke kritisk/ men bør beløpe seg til tilnærmelsesvis 5-20 cm. A cohesive metal chain 52 is attached at the ends to the corresponding clamping piece 10, 12 - in connection with the joint pin 22 and the rivet 48 respectively. The clamping pieces 10, 12 will thus always be able to be handled together despite the fact that they are detachable. The length of the link 52 is not critical/ but should amount to approximately 5-20 cm.

Som det fremgår av tegningen har klemstykkets 10 anleggskant 42 en noe krum flate. Denne krumme flate har en mindre krumnings-radius enn klemstykkets 12 tilsvarende anleggskant 54. Ved dette arrangement fås den ønskede effektive pressing mot trekkfjæren. Ved valg av materialet blir det også mulig på grunn av klemstykkenes elastisitet medøkende presskraft mot klemstykkeendene å forlenge pressflaten mot trekkfjæren. Presskantene 42, 54 kan være relativt jevne, og da materialet i klemstykkene 10, 12 har lavere hårdhetsgrad enn trekkfjærmaterialet, er det ingen risiko for at skader i form av grader eller lignende kan oppstå på trekkfjæren ved anleggskantenes.42,54 angrep mot fjæren. As can be seen from the drawing, the contact edge 42 of the clamping piece 10 has a slightly curved surface. This curved surface has a smaller radius of curvature than the corresponding contact edge 54 of the clamping piece 12. With this arrangement, the desired effective pressing against the tension spring is obtained. When choosing the material, it is also possible, due to the elasticity of the clamping pieces, with increasing pressure force against the clamping piece ends, to extend the pressing surface against the tension spring. The pressing edges 42, 54 can be relatively smooth, and as the material in the clamping pieces 10, 12 has a lower degree of hardness than the tension spring material, there is no risk of damage in the form of burrs or the like occurring on the tension spring at the contact edges 42, 54 against the spring.

Ved at trekkfjæren i sin normale tilstand søker å innta krum form, vil stivheten i selve fjæren bidra til at klemstykkene 10, 12 skilles ad ved dreining om leddtappen 22, når presskraften As the tension spring in its normal state seeks to assume a curved shape, the stiffness in the spring itself will contribute to the clamping pieces 10, 12 being separated by turning about the joint pin 22, when the pressing force

mot klemstykkeendene opphører. Ved å minske håndens trykk mot verktøyet noe, kan håndverktøyet således efter ønske skyves frem-over eller bakover langs trekkfjæren, som igjen gripes når tryk-ketøker. towards the clamping piece ends ceases. By reducing the hand's pressure against the tool somewhat, the hand tool can thus be pushed forwards or backwards along the tension spring as desired, which is again gripped when the pressure increases.

Når trekkfjæren skal gripes i den ene ende, innføres den mellom klemstykkene 10, 12 ved den fremre del av verktøyet. Klemstyk-' kene 10, 12 er da sammenføyet og leddtappendene 24, 26 befinner seg ved sporbunnene 32, 34. Hvis trekkfjæren skal innføres i håndverktøyet på et sted mellom fjærendene/ løsnes klemstykkene 10, 12 fra hverandre. Herefter plasseres fjæren i mellomrommet mellom klemstykkets 12 sidevegger 18, 20, hvorefter klemstykket 10 kobles sammen med klemstykket 12 ved at leddtappendene 24, 26 innføres i respektive spor 28, 30. When the tension spring is to be gripped at one end, it is inserted between the clamping pieces 10, 12 at the front part of the tool. The clamping pieces 10, 12 are then joined and the joint pin ends 24, 26 are located at the groove bottoms 32, 34. If the tension spring is to be inserted into the hand tool at a place between the spring ends, the clamping pieces 10, 12 are detached from each other. The spring is then placed in the space between the side walls 18, 20 of the clamping piece 12, after which the clamping piece 10 is connected to the clamping piece 12 by inserting the joint pin ends 24, 26 into respective grooves 28, 30.

Modifikasjoner av det foran beskrevne håndverktøy kan naturlig-vis forekomme innenfor rammen av kravene. Således kan klemstykkenes innbyrdes styring og låsing varieres på mange forskjellige måter. Leddtappen kan alternativt være festet på det med sidevegger forsynte klemstykke, idet et tilsvarende spor er utformet i det andre klemstykke. Klemstykkeformen kan endres efter ønske, slik at et godt grep alltid fås for hånden når verktøyet gripes. Modifications to the hand tool described above can naturally occur within the scope of the requirements. Thus, the mutual control and locking of the clamping pieces can be varied in many different ways. The joint pin can alternatively be attached to the clamp piece provided with side walls, as a corresponding groove is formed in the other clamp piece. The shape of the clamping piece can be changed as desired, so that a good grip is always at hand when the tool is gripped.

Claims

1. Hand tool consisting of two clamping pieces (10, 12) articulated in relation to each other, intended for, when pulling wires and/or threads by means of tension springs or the like, to grip the tension spring introduced herein in the form of a grip handle for a installer to facilitate the insertion of the spring in the respective extraction of a narrow passage, such as in a pipe, characterized in that a space (16) adapted to the spring is defined between the clamping pieces (10, 12) in their longitudinal direction, when they are pressed against each other, as they parts of the clamping pieces that grip the spring and hold it firmly when the clamping pieces are pressed from opposite sides are located between the joint (22) and the area for a hand that exerts the pressing force.

2. Hand tool as stated in claim 1, characterized in that the clamping pieces (10, 12) are releasably joined so that the spring can be inserted between them either when they are joined or when they are separated from each other.

3. Hand tool as specified in claim 1 or 2, characterized in that the joint comprises a joint pin (22), which extends through the clamping pieces (10, 12) in a transverse direction at one end of the hand tool.

4. Hand tool as specified in claim 3, when this is dependent on claim 2, characterized in that the joint pin (22) is fixed in one clamping piece (10) and that the protruding pin ends (24, 26) on both sides of this are radial insertable in corresponding guide grooves (28, 30) in the second clamping piece (12) when joining the clamping pieces.

5. Hand tool as specified in one of claims 1-3, characterized in that the surface (42) of at least one of the clamp parts that can be pressed against the spring is curved.

6. Hand tool as stated in claim 4, characterized in that the surface (42) of at least one of the clamping piece parts that can be pressed against the spring is curved, the grooves (28, 30) being designed in such a way that the pin (22) is pressed against the groove bottoms (32) , 34) when the clamping pieces (10, 12) are pressed together.

7. Hand tool as specified in one of claims 1-6, characterized in that the clamping pieces (10, 12) are controllably arranged in relation to each other by compression.

8. Hand tool as stated in claim 7, characterized in that one clamping piece (10) along part of its length has a T-shaped cross-section and that the second clamping piece (12) for steering relative to the first along at least part of its corresponding length has a U-shaped cross-section adapted to the T-shaped cross-section.

9. Hand tool as specified in one of claims 5 - 8, characterized in that at least one of the clamping pieces (10, 12) is somewhat yielding, so that a stronger pressing of the clamping pieces means that a longer attack surface is obtained in relation to the spring.