NO123829B

NO123829B -

Info

Publication number: NO123829B
Application number: NO0365/70A
Authority: NO
Inventors: Lee Alton Kilgore; R Fergestad; T Schanche
Original assignee: Nat Ind As
Priority date: 1969-02-19
Filing date: 1970-02-02
Publication date: 1972-01-17
Also published as: GB1307490A; BE745989A; US3588557A; SE375206B; FR2035656A5; CH500620A; GB1306711A; CA919233A; ES376552A1; DE2007194A1

Description

Anordning ved fallrepstrappers trinn. Device at the step of the rope ladder.

Nærværende oppfinnelse vedrører en anordning ved fallrepstrappers trinn av den ty-pe hvor trinnene er lagret dreibare med akser perpendikulære på trappens lengdeakse samt omfattende en mekanisme for trinnenes dreining og fastholdelse i ønsket vinkelstilling. The present invention relates to a device for the steps of a rope staircase of the type where the steps are stored rotatable with axes perpendicular to the longitudinal axis of the stairs and comprising a mechanism for the steps' rotation and retention in the desired angular position.

På grunn av et fartøys varierende dyp-gående eller også på grunn av høy- og lav-vann når fartøyet ligger ved kai, vil et fall-reps skråstilling stadig måtte varieres. Foråt trappens trinn allikevel til stadighet skal kun-ne anordnes horisontale, har det tidligere vært foreslått en rekke forskjellige mekanis-mer hvorved trinnene kan vries eller dreies om en akse perpendikulær på trappens lengdeakse. Det alminneligste arrangement har da vært at trekkstenger langs innsiden av trappens vanger tjener til innstilling av trinnene i ønsket vinkelstilling i forhold til trappens lengdeakse. Due to a vessel's varying draft or also due to high and low water when the vessel is at the quay, the angle of a fall rope will constantly have to be varied. Before the steps of the stairs must always be arranged horizontally, a number of different mechanisms have previously been proposed whereby the steps can be twisted or rotated about an axis perpendicular to the longitudinal axis of the stairs. The most common arrangement has then been that tie rods along the inside of the stairs' sides serve to set the steps in the desired angular position in relation to the longitudinal axis of the stairs.

I den senere tid er man i stor utstrekning In recent times, it is widely used

gått over til å fremstille fallrepstrapper av lettmetall. En fallrepstrapp har imidlertid lett for å bli utsatt for hårhendt behandling såvel under tilrigging hvor den gjerne løftes på plass med vinsjer idet det slåes en stropp rundt fallrepstrappen, som ved bruk hvor taubåter og lektere har lett for å beskadige fallrepet. Selv en mindre lokal deformering av et slikt fallrep kan derved bevirke at hele innstillingsmekanismen for trinnene blir ubrukelig. moved on to produce fall rope ladders made of light metal. However, a fall rope ladder is easily exposed to rough handling both during rigging, where it is often lifted into place with winches as a strap is wrapped around the fall rope ladder, and in use where tugboats and barges easily damage the fall rope. Even a minor local deformation of such a fall rope can thereby cause the entire setting mechanism for the steps to become unusable.

Oppfinnelsen tar sikte på å eliminere ovennevnte ulempe, og dette oppnås ved at trinnene gjøres individuelt innstillbare i forhold til trappens vanger. The invention aims to eliminate the above-mentioned disadvantage, and this is achieved by making the steps individually adjustable in relation to the sides of the stairs.

Til bedre forståelse av oppfinnelsen skal denne nedenfor beskrives nærmere under hen-visning til et på tegningen vist foretrukket utførelseseksempel. For a better understanding of the invention, it will be described in more detail below with reference to a preferred embodiment shown in the drawing.

Fig. 1 viser et snitt gjennom et trinn der Fig. 1 shows a section through a step there

inngår i en fallrepstrapp ifølge oppfinnelsen. is part of a fall rope ladder according to the invention.

Fig. 2 er et snitt etter linjen A—A i Fig. 2 is a section along the line A—A i

fig. 1. fig. 1.

Fig. 3 viser en detalj vedrørende anord-ningen ifølge fig. 1 og 2 sett ovenfra. Fig. 3 shows a detail regarding the device according to fig. 1 and 2 seen from above.

Trappen ifølge det viste eksempel er for-trinnsvis fremstilt av aluminium og omfatter vanger 1 mellom hvilke er lagret trinn 2 dreibare om lagringene 3, 4. Ved trinnets indre The stairs according to the example shown are preferably made of aluminum and comprise rails 1 between which are stored steps 2 rotatable about the bearings 3, 4. At the inside of the steps

lengdekant er det anordnet to ko-aksiale stenger 5, 5', som har styring i brakettene 4 samt longitudinal edge, there are arranged two coaxial rods 5, 5', which have control in the brackets 4 as well as

i et vinkelstykke 10 på midten av trinnene. in an angle piece 10 in the middle of the steps.

Mellom stengene 5, 5' er det anbragt en skruefjær 7, og stengene er i de indre ender forsynt med betjeningsarmer 6, 6', som raker opp mellom en uttakning 9 i trinnets over-flate nær ved den bakre lengdekant, slik dette tydelig sees på tegningen. Between the rods 5, 5' is placed a coil spring 7, and the rods are provided at the inner ends with operating arms 6, 6', which rake up between a recess 9 in the surface of the step close to the rear longitudinal edge, as this can clearly be seen on the drawing.

De ytre ender av stengene 5, 5', blir av fjæren 7 presset til anlegg mot vangene 1 og vil således av fjærpresset automatisk smette inn i de hullrekker 8 som er tatt ut i vangene 1. The outer ends of the rods 5, 5' are pressed by the spring 7 into abutment against the vanes 1 and will thus automatically slide into the rows of holes 8 taken out in the vanes 1 by the spring pressure.

Når trinnet 2 skal innstilles med ønsket vinkelstilling i forhold til trappens lengdeakse, behøver man således kun med et fingergrep av tommel- og pekefinger å sammenpres-se de to betjeningsarmer eller knaster 6, 6', mot virkningen av fjæren 7, hvorved stengenes 5, 5', ytre ender bringes ut av inngrep med hullene 8 i vangene 1. Trinnet kan derpå gis ønsket vinkelstilling og armene 6, 6', slip-pes, hvorved stengenes 5, 5' frie ender igjen vil presses inn i det av hullene i rekken som svarer til den ønskede stilling. When the step 2 is to be set at the desired angular position in relation to the longitudinal axis of the stairs, one only needs to use a finger grip of the thumb and forefinger to compress the two operating arms or knobs 6, 6' against the action of the spring 7, whereby the rods 5, 5', outer ends are brought out of engagement with the holes 8 in the brackets 1. The step can then be given the desired angular position and the arms 6, 6' are released, whereby the free ends of the rods 5, 5' will again be pressed into that of the holes in the row that corresponds to the desired position.

Claims

1. Device at the step for a rope ladder of the type where the steps are rotatable

about axes perpendicular to the longitudinal axis of the stairs and comprising a mechanism for the steps' rotation and retention in the desired angular position, characterized in that each of the steps is individually rotatable about a suitable bearing and is provided with separate locking means for fastening in the desired angular position.

2. Device according to claim 1, characterized in that the locking member consists of two coaxial rods (5, 5') which extend in the longitudinal direction of the step close to its longitudinal edge remote from the bearing axis, which rods (5, 5') are pressed in the direction from each other to engage with rows of holes (8) arranged in the stairs' sides (1,1), and have operating arms (6, 6') intended to release the bars (5, 5') from locking engagement when the step's angular position is to be changed.

3. Device according to claims 1-2, characterized in that said spring force is provided by a helical spring (7) arranged between said rods (5, 5') and coaxially with them.

4. Device according to claim 1-3, characterized in that said operating arms consist of vertically protruding knobs (6, 6') on the rods (5, 5') arranged at the inner ends of the rods so that their mutual distance is equivalent to a ordinary finger grip, as the operating knobs (6, 6') reach up through a recess (9) close to the rear longitudinal edge of the step (2).