DK155058B

DK155058B - OPERATING MECHANISM FOR A ROLLER SHUTTER

Info

Publication number: DK155058B
Application number: DK79983A
Authority: DK
Inventors: Karl Pedersen; Bjarne Trankjaer
Original assignee: Fabers Fab As C
Priority date: 1983-02-23
Filing date: 1983-02-23
Publication date: 1989-01-30
Also published as: DK79983D0; JPS59170529A; NL8400267A; DE3405647A1; DK155058C; DK79983A

Description

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DK 155058 BDK 155058 B

Den foreliggende opfindelse angår en betjeningsmekanisme til et rullegardin og af den i krav l's indledning angivne art.BACKGROUND OF THE INVENTION The present invention relates to a roller blind operating mechanism and to the nature of the preamble of claim 1.

En betjeningsmekanisme af denne art benyttes ved rullegar-5 diner til at hindre, at gardinet vikles af stokken som følge af gardinets egen vægt eller, især på steder med offentlig adgang, som følge af, at uvedkommende trækker i gardi net.An operating mechanism of this kind is used at roller dinars to prevent the curtain from being unwound due to the weight of the curtain or, especially in places with public access, due to unauthorized pulling of the curtain.

I kendte mekanismer af den omhandlede art anvendes en brem-10 semekanisme, der virker ved hjælp af en fjeder, som strammer til om en cylinder, når den vrides i en første retning, og løsner sig ved modsat omdrejning. Denne mekanisme kræver stor nøjagtighed mellem fjeder og cylinder for at fungere tilfredsstillende. Fjederen har endvidere udadbøjede 15 medbringertappe, som udgør et svagt punkt ved belastning og kan beskadige mekanismens øvrige dele, især hvis disse er fremstillet af plast.In known mechanisms of the present invention, a braking mechanism is used which acts by means of a spring which tightens about a cylinder when it is rotated in a first direction and loosens at opposite rotation. This mechanism requires high accuracy between the spring and cylinder to operate satisfactorily. The spring also has outwardly bending 15 carrier pins, which are a weak point at load and can damage the other parts of the mechanism, especially if they are made of plastic.

Det skal endvidere bemærkes, at den kendte mekanisme sædvanligvis er beregnet for brug i kun den ene eller den an-20 den ende af en gardinstok. Kun ved en særdeles kompliceret udformning af bremsemekanismen er det muligt at hindre såvel af- som påvikling af gardinet ved direkte drejning af gardinstokken, altså uden betjening af kuglekæden.Furthermore, it should be noted that the known mechanism is usually intended for use on only one or the other end of a curtain rod. Only by a very complicated design of the braking mechanism can it be possible to prevent both winding and winding of the curtain by direct rotation of the curtain rod, ie without operating the ball chain.

Formålet med opfindelsen er at anvise en mekanisme af den 25 omhandlede art, som dels har en yderst enkel og robust udformning, dels kan monteres ved en vilkårlig af gardinstokkens ender.The object of the invention is to provide a mechanism of the kind which has a very simple and robust design and can be mounted at any of the ends of the curtain rod.

Dette opnås ifølge opfindelsen ved den i krav 1 anviste konstruktion.This is achieved according to the invention by the construction of claim 1.

30 Ved drejning af den anden af de roterbare dele (gardinstokken) vil den indbyrdes bevægelse af de to legemer bevirke, at disse føres fra hinanden til indgreb med låsefladerne. Yderligere drejning er herved umuliggjort. Drejes derimod den første af de roterbare dele (styrehjulet med kuglekæ-35 den), medbringes begge legemer og dermed den anden af de to dele (gardinstokken).By rotating the other of the rotatable parts (the curtain rod), the mutual movement of the two bodies will cause them to move apart to engage the locking surfaces. Further turning is thereby impossible. If, on the other hand, the first of the rotatable parts (the steering wheel with the ball chain) is turned, both bodies are carried and thus the second of the two parts (the curtain rod).

Opfindelsen skal i det følgende forklares nærmere i forbin delse med tegningen, hvor - 2 -BRIEF DESCRIPTION OF THE DRAWINGS The invention will now be explained in more detail with reference to the drawings, in which - 2 -

DK 155058 BDK 155058 B

fig. 1 i perspektiv og med hoveddele indbyrdes adskilt vi-5 ser de væsentlige dele af et rullegardin med en kobling ifølge opfindelsen, og fig. 2 ligeledes i perspektiv og med hoveddele indbyrdes adskilt den i fig. 1 viste kobling.FIG. 1 is a perspective view of the main parts of a roller blind with a coupling according to the invention, with separate parts, and FIG. 2 is also perspective and with main parts spaced apart from that of FIG. 1.

10 I fig. 1 er vist en sædvanlig gardinstok 1, som i den ene ende har en aksialt udstående tap 2 med kantet tværsnit og i den anden ende en aksialt udstående tap 3 med cirkulært tværsnit. Ved hjælp af disse tappe 2 og 3 kan gardinstokken 1 på kendt måde ophænges i ikke viste beslag. I hvert 15 fald i den ende, hvor den udstående tap 2 har kantet tværsnit, er gardinstokken 1 rørformet, hvorhos den i fig. 2 nærmere viste kobling 4, som bærer tappen 2, med prespasning kan indføres aksialt i gardinstokken.10 In FIG. 1, there is shown a conventional curtain rod 1 which has at one end an axially protruding tab 2 with an angular cross-section and at the other end an axially protruding tab 3 with a circular cross-section. By means of these pins 2 and 3, the curtain stick 1 can be suspended in a known manner in fittings not shown. In every 15 cases at the end where the protruding tab 2 has an angular cross-section, the curtain stick 1 is tubular, as shown in FIG. 2, shown in more detail, coupling 4, which carries the pin 2, can be inserted axially into the curtain rod with a press fit.

Koblingen 4 omfatter et styrehjul 5, der er udformet for 20 samvirke med en kuglekæde 6, ved hjælp af hvilken gardinstokken 1 kan drejes om sin langsgående akse. Koblingen er, som det skal forklares nærmere i forbindelse med fig. 2, således udformet, at gardinstokken 1 og styrehjulet 5 ikke kan drejes, ved at gardinstokken 1 søges drejet direkte el-25 ler ved træk i et om stokken viklet, ikke vist gardin.The coupling 4 comprises a guide wheel 5 which is designed to cooperate with a ball chain 6, by means of which the curtain rod 1 can be rotated about its longitudinal axis. The coupling is, as will be explained in more detail in connection with FIG. 2, such that the curtain rod 1 and the steering wheel 5 cannot be turned by seeking the curtain rod 1 or turned directly or by pulling in a curtain, which is not wrapped, not shown.

Tappen 2 med kantet tværsnit er som vist i fig. 2 udformet i den ene ende af en akseltap 7. I den anden ende af akseltappen findes en aksial slids 12, og tappen 7 bærer yderst en radialt fremstående spærrekrave 11. I hver ende 30 af akseltappen 7 findes en keglestubformet friktionsflade 8 og 9, hvilke friktionsflader har deres mindre diametre vendt mod hinanden. For at muliggøre montering af koblingen er en af friktionsfladerne, ved den viste udførelsesform friktionsfladen 9 længst fra den kantede tap 2, udfor-35 met på et legeme 10 med en aksial boring, der tillader, at legemet, ved sammenpresning af slidsen 12, kan føres over spærrekraven 11 og fastgøres på akseltappen 7.The tab 2 with angular cross section is shown in FIG. 2 is formed at one end of a shaft pin 7. At the other end of the shaft pin is an axial slot 12, and the pin 7 carries a radially protruding ratchet 11. At each end 30 of the shaft pin 7 is a frusto-friction surface 8 and 9 which friction surfaces have their smaller diameters facing each other. To enable mounting of the clutch, one of the friction surfaces, in the embodiment shown, is the friction surface 9 furthest from the angular pin 2, formed on a body 10 with an axial bore which allows the body, when compressed by the slot 12, to be able to is passed over the locking collar 11 and secured to the shaft pin 7.

DK 155058 BDK 155058 B

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Styrehjulet 5 har en aksial, cylinderformet boring. Radialt ind i denne boring strækker sig diametralt over for hinanden to medbringerknaster 13. I boringen er anbragt en navbøsning 14. Bøsningen 14 har en aksial boring, der mod-5 svarer friktionsfladen 8 på akseltappen 7. Ved aksial forskydning (til venstre i fig. 2) af bøsningen 14 kan denne fastkiles på akseltappen 7, således at bøsning og tap er indbyrdes udrejelige, indtil bøsningen 14 forskydes i modsat retning (til højre i fig. 2), og friktionen mellem de 10 to kegleflader mindskes.The steering wheel 5 has an axial cylindrical bore. Radially into this bore are diametrically opposite to each other two carrier lugs 13. In the bore is arranged a hub bushing 14. The bushing 14 has an axial bore which corresponds to the friction surface 8 on the shaft pin 7. At axial displacement (left in FIG. 2) of the bushing 14 it can be wedged onto the shaft pin 7 so that the bushing and pin are mutually removable until the bushing 14 is displaced in the opposite direction (to the right in Fig. 2) and the friction between the two cone faces is reduced.

Navbøsningen 14 har diametralt over for hinanden to perifere spor 15, der i omkredsretningen strækker sig over hver ca. 90°. I disse spor kan styrehjulets medbringerknaster 13 optages med frigang, således at styrehjulet 5 kan drejes 15 noget i begge retninger, inden bøsningen 14 medbringes i drejningen.The hub bush 14 has diametrically opposite one another two peripheral grooves 15 which extend circumferentially over each approx. 90 °. In these tracks, the guide wheels 13 of the steering wheel can be released freely, so that the steering wheel 5 can be turned 15 somewhat in both directions before the bushing 14 is brought into the rotation.

Et medbringerlegeme 17, der med prespasning kan indføres i den rørformede ende af gardinstokken 2, har en aksial boring, der modsvarer den anden friktionsflade 9 og to diame-20 trait over for hinanden anbragte perifere spor 18. Disse spor 18 svarer til navbøsningens spor 15 og tjener som disse til optagelse af styrehjulets 5 medbringerknaster 13.A carrier body 17, which can be inserted into the tubular end of the curtain rod 2 by pressure fitting, has an axial bore corresponding to the second friction surface 9 and two diametrically arranged peripheral grooves 18. These grooves 18 correspond to the groove sleeve grooves 15 and serves as these for receiving the guide wheels 13 of the steering wheel 5.

Mellem sporene 15 henholdsvis 18 findes på henholdsvis navbøsningen og medbringerlegemet mod hinanden vendte samvir-25 kende flader 19 henholdsvis 20. Disse flader 19 og 20 er således udformet, at deres indbyrdes afstand vokser med afstanden fra sporene 15,18 og afgrænser et rum, hvori en kugle kan optages.Between the grooves 15 and 18, respectively, are found on the hub bushing and the carrier body, respectively, facing the interacting surfaces 19 and 20. These surfaces 19 and 20 are designed so that their spacing increases with the distance from the grooves 15,18 and delimits a space in which a bullet can be recorded.

Ved drejning af styrehjulet 5 vil dettes knaster 13 med-30 bringe navbøsningen 14 og medbringerlegemet 17, således at gardinstokken 1 drejes. Denne drejning kan ske i begge retninger. Søger man derimod at dreje gardinstokken 1 og dermed medbringerlegemet 17, vil kuglerne mellem fladerne 19 og 20 presse disse fra hinanden. Derved fastklemmes 35 bøsningen 14 og medbringerlegemet 17 på de to friktionsflader 8 og 9, således at yderligere drejning umuliggøres.When turning the steering wheel 5, its lugs 13 will cause the hub bushing 14 and the carrier body 17 to rotate the curtain rod 1. This rotation can happen in either direction. If, on the other hand, it is sought to rotate the curtain stick 1 and thus the carrying body 17, the balls between the surfaces 19 and 20 will push them apart. Thereby, the bushing 14 and the carrier body 17 are clamped on the two friction surfaces 8 and 9, so that further rotation is impossible.

Claims

1. The operating mechanism between a guide wheel (5) and a curtain rod (1) with a common axis in a roller blind where it is possible to wrap a curtain on and off the curtain rod (1) by means of, for example, a ball chain (6) which is engaged about and in engagement with the steering wheel (5) which is interconnected in such a way with the curtain rod (1) that it cannot be rotated directly or by tension in the curtain, characterized in that the mechanism comprises two frusto-friction surfaces (8). , 9), which are mounted at each end of a shaft 10 (7) with their smaller diameters facing each other, that between the friction surfaces (8,9) are arranged two bodies (14.17) which can rotate about the shaft pin. (7), which bodies (14.17) thus have mutually interacting wedge surfaces (19,20) that rotation of one body relative to the other causes displacement of the two bodies from each other to locking frictional engagement with the friction surfaces (8,9) and that the two bodies (14,17) are rotatable via a release mechanism (13,18,19) by by means of the first (5) of the two rotatable parts (5,1), while the one body (17) is extendably connected to the second (1) of the two parts.

2. An operating mechanism according to claim 1, characterized in that the opposite end faces of the two bodies (14,17) are substantially V-shaped notches (19,20) and that of two opposite tracks (19,20) a ball is arranged. 30