NO763675L

NO763675L -

Info

Publication number: NO763675L
Application number: NO763675A
Authority: NO
Inventors: K Hasselas
Original assignee: Seasafe Transport Ab
Priority date: 1975-10-29
Filing date: 1976-10-28
Publication date: 1977-05-02
Also published as: SE7512104L; DE2649880A1; JPS5256697A; IT1070915B; DE2649880B2; ZA766331B; BR7607231A; GB1563022A; FI763015A; SU640679A3; FR2329905A1; DE2649880C3

Description

STRAMMEANORDNING FOR KJETTINGER, WIRE ELLER LIGNENDE.TENSIONING DEVICE FOR CHAINS, WIRE OR SIMILAR.

Ved anvendelse av kjettinger foreligger meget ofte et behov forWhen using chains, there is very often a need for

å kunne stramme kjettingene. Det samme gjelder wire med og uten lokker, stenger m.v. For dette formål er et stort antall for-skjellige strammeanordninger kjent, som arbeider efter vektstang-prinsippet. For å tilveiebringe en noenlunde stor strammekraft fordres en viss minste vektarmslengde, slik at slike anordninger får en lengde som står i et visst forhold til den oppnåbare strammekraft. Dette innebærer at f.eks. ved surring av tung last på jernbanevogner eller fartoysdekk fordres forholdsvis plasskrevende strammeanordninger. to be able to tighten the chains. The same applies to wire with and without lids, rods etc. For this purpose, a large number of different tensioning devices are known, which work according to the lever principle. In order to provide a reasonably large tightening force, a certain minimum weight arm length is required, so that such devices have a length that is in a certain ratio to the achievable tightening force. This means that e.g. when lashing heavy loads on railway wagons or ship decks, relatively space-consuming tensioning devices are required.

Det er også kjent strammeanordninger beregnet på å stramme en kjetting eller wire, hvilke festes i kjettingens eller wirens ene ende og hvilke er bygget opp av et avlangt hus med en i dets ene ende anordnet kjetting elier wirefesteanordning, en inne i huset anordnet og i husets to ender dreibart lagret skruespindel som i den fra kjettingen vendte ende er forbundet med en veiv-stang, samt et mellom huset og skruespindelen anordnet ikke dreibart glidestykke, som rager radielt ut fra en langsgående sliss i huset og har en med skruespindelen samvirkende innvendig gjenget del og.som med sin utadragende del er beregnet på å gripe om den gjenstand, mot hvilken kjettingen skal strammes. There are also known tensioning devices designed to tighten a chain or wire, which are attached to one end of the chain or wire and which are built up of an elongated housing with a chain or wire attachment device arranged at one end, an arranged inside the housing and in the housing's two ends rotatably mounted screw spindle which is connected to a crank rod at the end facing away from the chain, as well as a non-rotatable sliding piece arranged between the housing and the screw spindle, which projects radially from a longitudinal slot in the housing and has an internally threaded part interacting with the screw spindle and.which with its protruding part is designed to grip the object against which the chain is to be tightened.

En ulempe med disse kjente skruestrammeanordninger er at de på grunn av det store dreiemoment, som utoves av veivlengden som et resultat av skruens betydelige stigning, soker å dreie hele huset, som derfor utenifra må holdes på plass ved mothold. A disadvantage of these known screw tightening devices is that due to the large torque, which in addition to the crank length as a result of the screw's considerable pitch, they seek to turn the entire housing, which must therefore be held in place from the outside by counterholding.

Dessuten fordrer veivlengden eller en eventuelt anvendt skifte-nøkkel plass i radial retning, og man kan derfor ikke med en slik anordning med fordel trekke sammen f.eks. to kjetting- eller wireender eller anbringe én slik strammeanordning ved siden av en kjetting eller wire. In addition, the length of the crank or a possibly used spanner requires space in the radial direction, and one cannot therefore advantageously pull together e.g. two chain or wire ends or place one such tensioning device next to a chain or wire.

Foreliggende oppfinnelse har til oppgave å tilveiebringe en ny strammeanordning for kjettinger, wire, m.v., som er kort i forhold til den tilforte strammekraft, krever minimal plass i sideretning og tillater stor strammelengde sett i forhold til strammeanordningens lengde. The present invention has the task of providing a new tensioning device for chains, wire, etc., which is short in relation to the added tensioning force, requires minimal space in the lateral direction and allows a large tensioning length in relation to the length of the tensioning device.

Dette, oppnås ifolge oppfinnelsen ved en strammeanordning av foran beskrevet slag stort sett ved at skruespindelen ved å utfor-as med liten stigning utover et lite moment på huset ved skruens dreining, at huset således' kan utfores smalt og at skruen According to the invention, this is achieved by a tensioning device of the type described above largely by the fact that the screw spindle is designed with a small pitch beyond a small moment on the housing when the screw is turned, that the housing can thus be designed narrowly and that the screw

er anordnet for å drives ved hjelp av en motprenhet som er koblet til det i form av et kraftuttak utforte drivuttak og som eventuelt er sammenbygget med huset. Huset er da fortrinnsvis utfort i form av en smal sylinder. Ved en slik anordning muliggjores is arranged to be driven by means of a counterweight which is connected to the drive outlet which is carried out in the form of a power take-off and which is possibly integrated with the housing. The housing is then preferably constructed in the form of a narrow cylinder. Such a device makes it possible

ved lasting og lossing en rask påvirkning av strammeanordningen ved at denne vil virke som en på kjettingen eller wiren anbragt utvekslingsanordning for en motorenhet. during loading and unloading, a rapid impact on the tensioning device in that this will act as an exchange device placed on the chain or wire for a motor unit.

Ved husets små dimensjoner i sideretning og ved at strammeanordningen drives av en motor som kan ha samme diameter som huset, muliggjores en rask og bekvem sammentrekking av to kjetting-eller wireender eller sammenstramming av en kjetting eller wire. Due to the housing's small dimensions in the lateral direction and the fact that the tightening device is driven by a motor which can have the same diameter as the housing, a quick and convenient contraction of two chain or wire ends or the tightening of a chain or wire is made possible.

Ved oppfinnelsen oppnås også en kompakt, robust og universalt anvendelig strammeanordning. The invention also results in a compact, robust and universally applicable tensioning device.

Oppfinnelsen skal nu beskrives nærmere under henvisning til tegningene, hvor The invention will now be described in more detail with reference to the drawings, where

fig. 1 viser en strammeanordning ifolge oppfinnelsen sett fra siden og delvis i snitt, fig. 1 shows a tensioning device according to the invention seen from the side and partially in section,

fig. 2 viser et tverrsnitt gjennom strammeanordningen,fig. 2 shows a cross-section through the tensioning device,

j ■ fig. 3 viser et lengdesnitt gjennom s tr amme anordningens ene ende, j ■ fig. 3 shows a longitudinal section through one end of the tight device,

og and

fig. 4 viser en kjetting med en ved dens side anbragt strammeanordning ifolge oppfinnelsen med tilhorende motor. fig. 4 shows a chain with a tensioning device placed next to it according to the invention with associated motor.

Som det fremgår av fig. 1 og 2 er strammeanordningen ifolge oppfinnelsen bygget opp av et avlangt, sylindrisk has 1. Ved dets ene lukkede kortende 2 er som kjetting- eller wirefesteanordning anbragt en forste kjettingkrok 3. Inne i huset er dreibart lagret en skruespindel 5, som ved husets andre kortende 4 rager ut av huset 1. På skruespindelen 5 er det anordnet et ikke dreibart glidestykke, som i sin helhet er betegnet med 6. Det rager ut av en langsgående sliss 9 i huset 1 og har en med'en andre kjettingkrok 7 forsynt hylselignende del 8, som lengdeforskyvbart griper om huset 1, samt inne i det sylindriske hus 1 en innvendig gjenget del 10 som står i inngrep med skruespindelens 5 gjenge. Hylsedelen 8 sitter med en liten klaring på huset 1, og den innvendig gjengede del 10 sitter med liten klaring inne i huset 1. Kjettingkrokene 3 og 7 gir ved inngrep med en kjetting tilstrekkelig styring for hele strammeanordningen for de moderate momenter som den utsettes for av drivmotoren. As can be seen from fig. 1 and 2, the tensioning device according to the invention is made up of an elongated, cylindrical shaft 1. At its one closed short end 2, a first chain hook 3 is placed as a chain or wire attachment device. Inside the housing, a screw spindle 5 is rotatably stored, which at the other short end of the housing 4 protrudes from the housing 1. On the screw spindle 5 there is arranged a non-rotatable sliding piece, which is designated in its entirety by 6. It protrudes from a longitudinal slot 9 in the housing 1 and has a sleeve-like part provided with a second chain hook 7 8, which longitudinally displaceably grips the housing 1, as well as inside the cylindrical housing 1 an internally threaded part 10 which engages with the thread 5 of the screw spindle. The sleeve part 8 sits with a small clearance on the housing 1, and the internally threaded part 10 sits with a small clearance inside the housing 1. The chain hooks 3 and 7, when engaged with a chain, provide sufficient control for the entire tensioning device for the moderate moments to which it is subjected by the drive motor.

Skruespindelen 5 er med en ikke nærmere betegnet tapp dreibart lagret også i husets med krok forsynte endeside 2. Som nevnt er skruespindelens 5 ut fra huset 1 ragende ende 11 utfort som et kraftuttak for motordrift, f.eks. ved hjelp av en pnevmatisk motor. Inne i huset 1 har skruespindelen ved kortenden 4 en krave 12, som kan oppta aksielt rettede krefter ved å legge seg mot kortendens 4 innside. Denne utforelse fremgår spesielt av fig. 3. The screw spindle 5 is also rotatably stored in the end side 2 of the housing provided with a hook by means of an unspecified pin. As mentioned, the end 11 of the screw spindle 5 protruding from the housing 1 is designed as a power take-off for motor operation, e.g. using a pneumatic motor. Inside the housing 1, the screw spindle at the short end 4 has a collar 12, which can absorb axially directed forces by laying against the inside of the short end 4. This embodiment appears in particular from fig. 3.

I fig. 1 vises ytterligere en detalj, som muliggjor å fastholde en ved hjelp av strammeanordningen ifolge oppfinnelsen strammet kjetting i strammet tilstand, mens strammeanordningen losnes, dreies fra hverandre og derpå igjen bringes til inngrep med kjettingen for fortsatt stramming. For dette er det i den her gjen-gitte utforelse anordnet en tredje kjettingkrok 13, som ligger stort sett i samme plan som de to andre kroker 3 og 7. For ikke å være i veien når kjettingen strammes med strammeanordningen, er den tredje krok gjort nedfellbar i retning mot de to andre kroker. I stedet for kroker kan man her selvsagt også anordne wirefesteanordninger av i og for seg kjent slag, f.eks. kilelås, In fig. 1 shows a further detail which makes it possible to maintain a chain tightened by means of the tensioning device according to the invention in a tensioned state, while the tensioning device is loosened, turned apart and then again brought into engagement with the chain for continued tightening. For this, in the embodiment reproduced here, a third chain hook 13 is arranged, which lies largely in the same plane as the other two hooks 3 and 7. In order not to be in the way when the chain is tightened with the tensioning device, the third hook is made foldable in the direction of the other two hooks. Instead of hooks, wire fastening devices of a known type can of course also be arranged here, e.g. wedge lock,

eksenterlås e.l.eccentric lock etc.

Fig. 4 viser til slutt en strammeanordning ifolge oppfinnelsen ved en praktisk anvendelse. En kjetting 14 har i den ene ende en krok 15/ som kan fasthukes f.eks. i et oye på en lastebil, som skal surres fast på et fartoysdekk. Kjettingens andre ende festes ved hjelp av en såkalt elefantfot 16 i en dertil beregnet åpning i fartoysdekket. Når kjettingens ender 15, 16 er festet, settes strammeanordningens ene krok i et kjettingledd, hvorpå kjettingen strammes for hånd og også den andre krok fores inn i nærmest beliggende kjettingledd.Derpå fores strammeanordningens kroker nærmere hverandre ved å dreie skruespindelen på foran beskrevet måte, inntil kjettingen ved hjelp av over en trykkluft-slange 18 pnevmatisk drevet motor 17 er strukket til onsket stramming. Motoren 17 fores da med sin drivhylse 19 over strammeanordningens drivuttak 20. Fig. 4 finally shows a tensioning device according to the invention in a practical application. A chain 14 has at one end a hook 15/ which can be hooked, e.g. in an oye on a lorry, which is to be lashed to a ship's deck. The other end of the chain is attached by means of a so-called elephant foot 16 in an opening intended for this purpose in the ship's deck. When the chain's ends 15, 16 are attached, one hook of the tensioning device is placed in a chain link, whereupon the chain is tightened by hand and the other hook is also fed into the nearest chain link. The hooks of the tensioning device are then fed closer to each other by turning the screw spindle in the manner described above, until the chain by means of a compressed air hose 18 pneumatically driven motor 17 is stretched to the desired tension. The motor 17 is then lined with its drive sleeve 19 over the tensioner's drive outlet 20.

Oppfinnelsen er meget fordelaktig, da det ifolge denne fås en strammeanordning, som har en meget kompakt og plassbesparende utforelse, spesielt kort lengde i forhold til den oppnåelige strammelengde. Videre er den oppnåelige strammekraft meget stor i forhold til anordningens lengde. Strammeanordningen er videre sær-deles robust og solid, idet det spesielt skal bemerkes at anordningens mest folsomme del, dvs. skruespindelen, ligger.godt beskyttet inne i det sylindriske hus. Man kan uten videre kjore med lastebil over strammeanordningen uten at den tar skade. Endelig krever strammeanordningen bare liten plass, både når den anvendes, strammes og når den stues bort efter anvendelse, hvil-ket er en fordel også ved strammeanordningens transport og lagerhold. The invention is very advantageous, as according to this a tensioning device is obtained, which has a very compact and space-saving design, especially short length in relation to the achievable tensioning length. Furthermore, the achievable tightening force is very large in relation to the length of the device. The tensioning device is also particularly robust and solid, as it should be noted in particular that the device's most sensitive part, i.e. the screw spindle, is well protected inside the cylindrical housing. You can easily drive a truck over the tensioning device without it being damaged. Finally, the tensioning device requires only a small amount of space, both when it is used, tightened and when it is stowed away after use, which is also an advantage when the tensioning device is transported and stored.

Claims

1. Tensioning device for chains, wire, etc. especially intended for lashing heavy loads, e.g. piece goods or rolling goods on transport vehicles or vessel decks, which device comprises an elongated housing (1) with a chain or wire attachment device etc. arranged in one of its shorter ends (2). (3), a rotatably arranged inside the housing (1) and stored in a short end of the housing screw spindle (5) with a on this by an internally threaded part

J (10) by the rotation of the screw spindle in the longitudinal direction of the housing (1) movable and in this controlled non-rotatable sliding piece (6), which with a part provided with a second chain or wire attachment device (7) projects radially from a longitudinal slot (9) in the housing, which part is preferably connected to a longitudinally displaceable sleeve (8) on the housing and which by means of said chain or wire attachment devices (3, 7) can be placed in connection with, e.g. next to it, a chain, wire etc. for tightening this, characterized in that the screw spindle (5) with, among other things, a small rise and storage by means of a collar (12) arranged on it and by arrangement of its drive outlet on the housing in the form of an unhindered by the chain, preferably parallelepipedic power take-off according to the exchange principle is designed for cooperation with a motor-driven, preferably pneumatically-driven unit, so that during loading and unloading a quick impact of the tensioning device as well as a large tensioning force is made possible. 2. Tensioning device as stated in claim 1, characterized in that the power connection outlet for the tensioning device is arranged at the short end of the housing (1) facing away from the chain or wire attachment end.

3. Tightening device as specified in claim 1 or 2, characterized in that the screw spindle (5) has such a small pitch that it is self-braking/ whereby at the same time the motor torque for operating the screw is small;

4. Tightening device as specified in claim 1, 2 or 3, characterized in that the housing (1) has a cylindrical shape.

5. Tightening device as stated in one or some of the preceding claims, characterized in that the inside and outside of the housing, the inside of the sleeve and the threaded part sit with little clearance in each other.

6. Tightening device as specified in one or more of the preceding claims, characterized in that the storage collar (12) rests against a counter-hold in the corresponding short end of the housing (1) in order to absorb the axial pressure of the spindle (5) which occurs during its rotation.