DK155807B

DK155807B - Collapsible rescue ladder

Info

Publication number: DK155807B
Application number: DK320487A
Authority: DK
Inventors: Svend Mortensen
Original assignee: Svend Mortensen
Priority date: 1987-06-24
Filing date: 1987-06-24
Publication date: 1989-05-16
Also published as: DK320487D0; DK320487A; DK155807C

Description

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Opfindelsen angår en sammenklappelig redningsstige af den art, som er angivet i krav 1*s indledning.The invention relates to a collapsible rescue ladder of the kind specified in the preamble of claim 1 *.

Kendte brandstiger af den omhandlede art er sædvanligvis af rebstigetypen, dvs med bøjelige stigesider, eksempelvis af wire eller tilsvarende brandsikkert materiale. Stiger af rebstigetypen er anvendelige til bygninger med en enkelt eller få etager. Til brug fra større højder er rebstiger uegnede eller ligefrem farlige at anvende på grund af stigernes tendens til at svinge fra side til side langs muren, samtidig med, at stigen har en uheldig tilbøjelighed til at vige ud fra muren under personens vægt. Dette opfattes af uerfarne brugere som meget ubehageligt og fremmer i en kritisk situation brugerens tendens til at reagere panisk.Known fire ladders of the kind in question are usually of the rope ladder type, ie with flexible ladders, for example of wire or similar fire resistant material. Rope ladder type ladders are suitable for single or low-rise buildings. For use from greater heights, rope ladders are unsuitable or downright dangerous to use due to the tendency of ladders to swing side to side along the wall, while the ladder has an unfortunate tendency to deviate from the wall under the person's weight. This is perceived by inexperienced users as very unpleasant and, in a critical situation, promotes the user's tendency to respond panically.

Brugen af en rebstige stiller store krav til brugerens fysik på grund af stigens tendens til at vige ud fra muren, hvorunder personen kommer til at hænge i armene, dvs at personen må bære hovedparten af sin egen vægt i armene. Dette i modsætning til en fast stige, hvor det især er benene, som optager vægten og udførerklatrearbejdet. Af hensyn til børn, ældre, svagelige og mennesker med bevægelseshandicap er redningsstiger af fast type derfor påkræver.The use of a rope ladder places great demands on the user's physique due to the tendency of the ladder to deviate from the wall under which the person will hang in his arms, ie the person must carry most of his own weight in the arms. This is in contrast to a fixed ladder, where it is in particular the legs that take up the weight and the climbing work. For the sake of children, the elderly, the infirm and people with disabilities, fixed ladders are therefore required.

Formålet med opfindelsen er at anvise en redningsstige af den omhandlede art, som afhjælper de mangler ved rebstiger, der er opstillet ovenfor. Dette opnås ifølge opfindelsen ved at indrette rednirigsstigen som angivet i den kendetegnende del af.krav 1. Ved udfoldning af stigen strækkes sidestykkerne, dvs wirerne, ud under stigens egenvægt. Straks når trinene belastes af en person glider de koniske eller reducerede rørender på rørmellemstykkerne ind i hinanden og låser derved stigen sammen til en fast - ikke bøjelig - enhed. Stigen virker derefter som en fast stige med de fordele, dette indebærer for brugerne, jvf de ovenfor anførte bemærkninger vedrørende klatreteknikken.The object of the invention is to provide a rescue ladder of the kind in question, which addresses the shortcomings of rope ladders set out above. This is achieved according to the invention by arranging the ladder ladder as set forth in the characterizing part of claim 1. When unfolding the ladder, the side pieces, i.e. the wires, are extended below the ladder's own weight. Immediately when the steps are loaded by a person, the tapered or reduced pipe ends of the pipe spacers slide into one another, thereby locking the ladder together into a fixed - not flexible - unit. The ladder then acts as a fixed ladder with the benefits this entails for users, cf. the above-mentioned comments regarding the climbing technique.

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Der kendes ganske vist sammenklappelige redningsstiger, hvor stigens sidestykker under brugen kan låses fast til hinanden til en stiv enhed, se f. eks. beskrivelsen til USA patent nr. 3078953. Denne stiges sidestykker består dog ikke af wirer eller reb, men af aluminiumprofiler, og denne stige er således af en anden art, end den i ansøgningen omhandlede.There are known collapsible rescue ladders, where the ladder side pieces during use can be locked together to a rigid unit, see, for example, the description for US Patent No. 3078953. and this ladder is thus of a different kind from the one in the application.

I en foretrukken udførelsesform for stigen ifølge opfindelsen, hvor trinene og rørmellemstykkerne består af aluminiumprofiler, er disse samlet parvis som anført i krav 2. Dette indebærer, at stigen bliver helt bøjningsstiv både i sideretningen og frem- og tilbage efter udfoldningen. Samtidig bliver stigen relativ enkel og billig at fremstille.In a preferred embodiment of the ladder according to the invention, wherein the steps and pipe spacers consist of aluminum profiles, these are assembled in pairs as set forth in claim 2. This means that the ladder becomes completely bending rigid both in the lateral direction and back and forth after the unfolding. At the same time, the ladder becomes relatively simple and inexpensive to manufacture.

Opfindelsen skal forklares nærmere i forbindelse med tegningen, hvor fig. 1 viser et udsnit af en stige ifølge opfindelsen i udfoldet men ikke sammenlåst stilling, fig. 2 samme i langsgående snit gennem den ene ende af et trin med tilhørende rørmellemstykke, fig. 3a stigen vist i sin helhed monteret på en bygning, i sammenfoldet stilling, og fig. 3b samme i udfoldet funktionsklar stilling.The invention will be explained in more detail in connection with the drawing, in which fig. 1 shows a section of a ladder according to the invention in the unfolded but not locked position; FIG. 2 shows the same in longitudinal section through one end of a step with associated pipe spacer; FIG. 3a shows the ladder shown in its entirety mounted on a building, in the folded position; 3b same in unfolded function-ready position.

I den på tegningen viste udførelsesform består redningsstigen i hovedsagen af et antal trin 1 indsat på to bøjelige wirer 2a og 2b, som udgør stigens bærende sidestykker, samt et antal rørmellemstykker 3 indsat på wirerne mellem de enkelte trin (fig. 1)·In the embodiment shown in the drawing, the rescue ladder consists essentially of a number of steps 1 inserted on two flexible wires 2a and 2b, which constitute the ladder's supporting side pieces, and a number of pipe spacers 3 inserted on the wires between the individual steps (Fig. 1).

Trinene 1 er fremstillet af aluminium-firkantrør. Hvert trin er fast forbundet med to rørmellemstykker 3, et i hver side. Rørmellemstykkerne er indsat i gennemgående boringer A i trinet og i de pågældende ender ekspanderet til konisk form 5, hvorved forbindelsen med trinet gøres permanent. I de modsatte ender, dvs de ender, der vender bort fra trinet, er rørene tildannet med reducerede rørender 6, dvs rørender med mindre 3The steps 1 are made of aluminum square tube. Each stage is firmly connected to two pipe spacers 3, one on each side. The tube spacers are inserted into through bores A of the step and at the ends thereof expanded to tapered form 5, thereby making the connection with the step permanent. At the opposite ends, ie the ends facing away from the step, the pipes are formed with reduced pipe ends 6, ie pipe ends with less 3

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diameter end den øvrige del af røret. De reducerede rørender 6 er beregnet til aksial indskydning i naborørstykkerne for fast sammenlåsning med disse efter stigens udfoldning. De koniske udkravninger 5 på rørstykkernes trinender letter indføringen af rørenderne i hinanden. Stigens sidewirer 2 forløber på langs indvendig i rørstykkerne 3 og medvirker ligeledes til rørstykkernes korrekte centrering i forhold til hinanden og dermed til rørernes sammenskydning.diameter than the other part of the pipe. The reduced pipe ends 6 are intended for axial insertion into the neighboring pipe pieces for fixed locking with these after unfolding of the ladder. The tapered notches 5 on the end of the pipe pieces facilitate the insertion of the pipe ends into each other. The side ropes 2 of the ladder extend longitudinally inside the pipe pieces 3 and also contribute to the correct centering of the pipe pieces relative to each other and thus to the jointing of the pipes.

I fig. 3a og 3b er stigen vist monteret udvendig på en bygning B. Stigens sidewirer er ophængt i en vandret konsol 7, som rager ud fra muren. I sammenfoldet tilstand (fig. 3a) er trinene med tilhørende rørmellemstykker foldet op under konsollen og holdes sammen af en skematisk vist udløsningswirw 8. Denne strækker sig ned langs husmuren og kan betjenes fra flere etager gennem bygningens ikke viste vinduer. Ved træk i udløs-ningswiren frigives stigen, og denne vil folde sig ud under virkningen af sin egen vægt. Straks når stigen derefter belastes glider rørmellemstykkerne 3 ind i hinanden og låser på denne måde stigen sammen til en bøjningsstiv enhed. Stigen placeres fortrinsvis langs en vinduesrække i bygningen, således at stigen kan betjene flere etager.In FIG. 3a and 3b, the ladder is shown mounted externally on a building B. The ladder sidewires are suspended in a horizontal bracket 7 which protrudes from the wall. In the folded state (Fig. 3a), the steps and associated pipe spacers are folded up under the bracket and held together by a schematically shown release wire 8. This extends down the house wall and can be operated from several floors through the windows not shown. By pulling in the release wire, the ladder is released and this will unfold under the effect of its own weight. As soon as the ladder is then loaded, the pipe spacers 3 slide into one another, thus locking the ladder together into a bending rigid unit. The ladder is preferably placed along a row of windows in the building, so that the ladder can serve several floors.

Claims

1. Collapsible rescue ladder of the type intended for exterior installation on a building or building structure for use as an escape route in the event of fire or other sudden emergency where the usual walkways (stairs, etc.) cannot be used and which rescue ladder in the main case consists of a plurality of steps (1) inserted on two flexible ropes or wires (2a, 2b) which form the sides of the ladder and which in the unfolded position is the supporting element of the ladder, characterized in that on the ropes or wires (2a, 2b) between the steps are provided with fixed side pieces in the form of pipe spacers (3) which enclose the rope or wire, and that these pipe spacers (3) have so designed complementary coupling ends (5,6) preferably of reduced cross section or conical shape that they allow in the unfolded position of the ladder a jointing of the tubes to produce a bending rigid connection from tubular to tubular.

A rescue ladder according to claim 1, wherein the steps consist of aluminum profiles or similar bending rigid profiles, characterized in that each step (1) is fixedly connected to two pipe spacers (3) which are inserted into bores (4) in the step and after insertion into the this expanded to tapered form. 1