NO123566B

NO123566B -

Info

Publication number: NO123566B
Application number: NO157008A
Authority: NO
Inventors: H Marion
Original assignee: S E G A N S
Priority date: 1964-03-14
Filing date: 1965-03-02
Publication date: 1971-12-13
Also published as: US3360042A; NL6503189A; GB1107391A; DE1240486B; FR1396585A; FR87349E

Description

Låseanordning for teleskopaktig i hverandre forskyvbare rør. Locking device for telescopically displaceable pipes.

Denne oppfinnelse vedrører en låseanordning for teleskopaktig i hverandre forskyvbare rør ved hvilken det er mulighet å låse dem pålitelig i ønskede aksielle inn-stilinger. Anordningen er hensiktsmessig f. eks. for stativer av forskjellig slags, hev-og senkbare understell for stoler og bord, skruestykker og lignende. Oppfinnelsen ut-merker seg hovedsakelig ved at det indre rør bærer minst tre aksialt etter hverandre anordnede sylindre med mot hverandre vendende skråttskårne endeflater, som parvis ligger etter planer som skjærer hverandre, idet den ytre sylinder er anordnet aksialt forskyvbar for å muliggjøre dels låsning av rørene ved aksial forskyvning av denne sylinder mot den mellomliggende sylinder, hvorved den sistnevnte sylinder forskyves mot den indre så at denne sammen med den mellomliggende sylinder glir utad etter de skrå flater mot ytterrøret, dels opplåsning ved at den ytre sylinder forskyves fra den mellomliggende sylinder og denne derved igjen opphører å trykke på den indre sylinder. This invention relates to a locking device for telescopically displaceable tubes in which it is possible to lock them reliably in desired axial settings. The device is appropriate, e.g. for racks of various kinds, raise and lower bases for chairs and tables, screw bits and the like. The invention is distinguished mainly by the fact that the inner tube carries at least three cylinders arranged axially one after the other with facing bevelled end surfaces, which lie in pairs on planes that intersect each other, the outer cylinder being arranged axially displaceable in order to partly enable the tubes to be locked by axial displacement of this cylinder towards the intermediate cylinder, whereby the latter cylinder is displaced towards the inner one so that this, together with the intermediate cylinder, slides outwards along the inclined surfaces towards the outer tube, partly unlocking by the outer cylinder being displaced from the intermediate cylinder and this thereby again ceasing to press on the inner cylinder.

Oppfinnelsen er vist på tegningen. Fig. 1 viser et aksialsnitt gjennom det ytre rør med iliggende lås i utlåst tilstand. Fig. 2 viser det samme i låst tilstand. Av to samvirkende rør er det indre be-tegnet med 1 og det ytre med 2. Til det indre rørs ene ende er festet en propp 3, som bærer en oppgj enget bolt 4. På bolten er tredd to rørformede sylindre 13 og 14, som er utført med mindre diameter enn rørets 2 innerdiameter og med aksielle hull med så stor diameter at sylindrene kan forskyves i tverretningen. Over disse to sylindre finnes en sylinder 5, i hvilken bolten 4 er innskrudd. Denne sylinder er avpasset The invention is shown in the drawing. Fig. 1 shows an axial section through the outer tube with an embedded lock in the unlocked state. Fig. 2 shows the same in the locked state. Of two interacting tubes, the inner one is designated by 1 and the outer by 2. A plug 3 is attached to one end of the inner tube, which carries a threaded bolt 4. Two tubular cylinders 13 and 14 are threaded onto the bolt, which is made with a smaller diameter than the inner diameter of the tube 2 and with axial holes of such a large diameter that the cylinders can be displaced in the transverse direction. Above these two cylinders there is a cylinder 5, into which the bolt 4 is screwed. This cylinder is adjusted

til å løpe med lett passing i det ytre rør. Sylindrenes mot hverandre vendende endeflater ved 7 og 15 er skråttskåret. to run with an easy fit in the outer tube. The opposite end surfaces of the cylinders at 7 and 15 are bevelled.

Utenfor sylinderen 5 er bolten forsynt med en stoppemutter 10 med en knast 11, som ved opplåsning, når sylinderen 5 skrues oppad, får anlegg mot en knast 12 på sylinderen og stopper fortsatt dreining, hvorved forhindres at sylindrer en ved friksjonsan-legg mot mutteren låses fast til denne, hvilket ville forårsake at sylindrene ved låsning fulgte med det indre rør og derved forhindret all låsevirkning, fordi denne beror på friksjon mellom sylindre og ytter-rør. Outside the cylinder 5, the bolt is provided with a stop nut 10 with a cam 11, which, when unlocked, when the cylinder 5 is screwed upwards, comes into contact with a cam 12 on the cylinder and stops further rotation, thereby preventing the cylinders from being locked by friction against the nut fixed to this, which would cause the cylinders to follow the inner tube when locked and thereby prevent any locking effect, because this is based on friction between the cylinder and the outer tube.

Anordningens virkemåte er følgende: I ulåst tilstand kan rørene forskyves aksialt i hverandre etter ønske. Låsningen foregår ved at rørene dreies relativt hverandre i en viss retning. Herved hviler sylindren 5 mot ytterrøret med en friksjon, som er tilstrek-kelig til å hindre at den dreies relativt røret 2. The operation of the device is as follows: In the unlocked state, the pipes can be displaced axially in each other as desired. The locking takes place by turning the pipes relative to each other in a certain direction. Hereby, the cylinder 5 rests against the outer tube with a friction which is sufficient to prevent it from turning relative to the tube 2.

Dette resulterer i at bolten 4 skruer hylsen 5 nedad. Sylindrene trykkes da sammen og glidning oppstår langs de skrå flater 7, 15, hvilket gjør at sylindrene 13, 14 forskyves i tverretningen til den i fig. 2 viste stilling. This results in the bolt 4 screwing the sleeve 5 downwards. The cylinders are then pressed together and sliding occurs along the inclined surfaces 7, 15, causing the cylinders 13, 14 to be displaced in the transverse direction to that in fig. 2 shown position.

Ved at sylindren 5 løper med lett pasning i røret 2 har man garanti for at bolten 4 ikke utsettes for bøyning i sideretningen. De skrå flater 7, 15 på begge sider av sylindren 13 gjør at sylindrene 13, 14 lett glir til siden og ved at sylindrene glir til motsatte retninger og spenner mot ytterrøret på to diametralt motsatte steder oppnåes en symmetrisk låsning, som gjør denne effek-tiv. By the fact that the cylinder 5 runs with an easy fit in the tube 2, you have a guarantee that the bolt 4 is not subjected to bending in the lateral direction. The inclined surfaces 7, 15 on both sides of the cylinder 13 cause the cylinders 13, 14 to slide easily to the side and by the cylinders sliding in opposite directions and clamping against the outer tube in two diametrically opposite places, a symmetrical locking is achieved, which makes this effective .

Ved opplåsning dreies rørene relativt When unlocked, the pipes are rotated relatively

hverandre i den motsatte retning, hvorved each other in the opposite direction, whereby

sylindren 5 skrues oppad og sylindrene 13, cylinder 5 is screwed upwards and cylinders 13,

14 slipper grepet mot ytterrøret. Rørene 14 releases its grip on the outer tube. The pipes

kan nu igjen forskyves aksialt relativt can now again be shifted axially relatively

hverandre. each other.

I stedet for låsning resp. opplåsning Instead of locking or unlocking

ved dreining, kan bolten 4 være trukket ned when turning, the bolt 4 can be pulled down

i røret 1 til et manøvreringsorgan f. eks. en in the pipe 1 of a maneuvering device, e.g. one

hevarm, med hvilket bolten 4 kan forskyves lever, with which the bolt 4 can be displaced

aksialt og herved føre sylindrene mot resp. axially and thereby lead the cylinders towards resp.

fra hverandre. apart.

Claims

1. Locking device for telescopic i

mutually displaceable tubes, characterized in that the inner tube (1) carries at least three axially arranged cylinders (5, 13, 14) with mutually facing beveled end surfaces (7, 15), which lie in pairs in planes that cut each other , while the outer cylinder (5) is arranged to be axially displaceable to partly enable locking of the pipes by axial displacement of this cylinder (5) towards the intermediate cylinder (13), whereby the last said cylinder is displaced towards the inner cylinder (14) so that this together with the intermediate cylinder (13) slides outwards along the inclined surfaces (7, 15) towards the outer tube (2), partly unlocking by the outer cylinder (5) being displaced from the intermediate cylinder (13) and this thereby again ceases to press on the inner cylinder.

2. Device according to claim 1, characterized in that the inner tube (1) is provided with a bolt (4) which is screwed into the outer cylinder (5) and with play space led through axial holes in the other two cylinders (13, 14), so that when turning the pipes relative to each other, the outer cylinder (5) is screwed against or from the intermediate cylinder (13).

3. Device according to claim 2, characterized in that the outer cylinder (5) is made to run with an easy fit in the outer pipe (2), while the other two cylinders (13, 14) are made with a smaller diameter than tube (2) inner diameter and with axial holes of larger diameter than the bolt diameter to allow displacements in the transverse direction.