SE123731C1

SE123731C1 -

Info

Publication number: SE123731C1
Authority: SE
Publication date: 1948-01-01

Description

Uppfinnare: N. G. Amgren. Inventor: N. G. Amgren.

Foreliggande uppfinning avser en forbattring av sadana for hopfastning av pa varandra lagda delar avsedda losbara fastanordningar, vilka innefatta en med lfimpligen pa motsatta sidor anordnade utsprang forsedd, vridbar butt och ett med denim samverkande fast-organ innefattande delar som uppvisa lutning i forhallande till bultens langdriktning fOr att vid bultens kringvridning astadkomma en fastanordningens delar sammanhallande axiell dragspanning i bulten. Forbattringen enligt uppfinningen bestar vasentligen dad, att fastorganet som är bildat av en enda trad företradesvis av fjadrande material, ãr formad sã att dess inellersta del bildar ett fastbulten fran dess ande omfattande U. Genom den Uforniade ombojningen av traden kring bultens ande ernas dels, att tradens lutande par-tier, vilka tjana som stodytor for bultens vingar, kunna givas en sadan utformning att fullt symmetriska belastningsforhallanden ernas vid ett minimum av erforderlig vridrOrelse hos bulten, dels att U:ets skanklar kunna utnyttjas som stopporgan fOr att i samverkan med vingarna pa bulten begransa dennas vridrorelse. The present invention relates to an improvement of such for fastening together superimposed detachable fastening devices, which comprise a projection provided with loosely arranged on opposite sides, rotatable butt and a fastening means cooperating with denim comprising parts which have an inclination relative to the longitudinal direction of the bolt. To provide, during the rotation of the bolt, an axial tensile stress in the bolt which holds the parts of the fastening device together. The improvement according to the invention essentially consists in the fact that the fixed member formed by a single thread, preferably of resilient material, is shaped so that its innermost part forms a fixed bolt from its spirit comprising U. the inclined parts of the wire, which serve as support surfaces for the wings of the bolt, can be given such a design that fully symmetrical load conditions are maintained at a minimum of required rotation of the bolt, and that the U's shanks can be used as stopping means for bolt restrict its torsional motion.

Uppfinningen tydliggOres narmare genom foljande beskrivning i anslutning till bifogade ritning, visande en utforingsform av uppfinningen. A ritningen forestaller fig. 1 en fastanordning i sidoprojektion isartagen och fig. 2 densamma i hopffist lage, medan fig. 3 visar det tradformade fastorganet i axiell projektion. The invention is further elucidated by the following description in connection with the accompanying drawing, showing an embodiment of the invention. In the drawing, Fig. 1 shows a fastening device in side projection in the shape shown and Fig. 2 the same in a folded position, while Fig. 3 shows the wire-shaped fastening member in axial projection.

I fig. 1 och 2 betecknar 1 den undre och 2 den Owe av tvenne pa varandra lagda platar, som skola hopfastas. Genom ett hal i delen 2 passerar en med ett skruvmejselspar forsedd bult 3 med tvenne utsprang 4, 5 bildade av ett bulten vinkelratt genomgende stilt. Den undre delen 1 uppvisar ett hal 6 stort nog att slappa igenom bulten 3 med dess utsprang 4, 5. Centriskt med avseende pa ha-let 6 är medelst tvenne nitar 7, 8 lid delen 1 anbragt ett till samverkan med bulten 3 avsett fastorgan 9, som är bildat av en enda trad vilken fir som av ritningen framgar, ombojd sa att den bildar ett U, som i fastanordningens hopsatta lage med sina skanklar 10, 11 omsluter fastbulten 3 fran dess ande. Skanklarna 10, 11 forlopa darvid fOrst parallellt med bultens 3 axel och aro sedan sasom aven framgar av fig. 3, ombojda sâ att de forlopa skruvformigt omkring bulten 3 under nagot mindre an ett halvt vary. Vid Overgangen mellan de parallella delarna 10, 11 och de skruvformigt bojda partierna uppvisar fastorganet pa vardera sidan en S-formig b5jning 12, 13 avsedd att fasthalla utspringen 4, 5 och darige.nom forhindra oavsiktlig vridning ay bulten 3. Fastorganets langre bort belagna partier stracker sig at sidorna ut frau bulten och aro ombajda till oglor 14, 15, genom vilka fastnitarna 7, 8 passera. In Figs. 1 and 2, 1 denotes the lower and 2 the Owe of two superimposed plates, which are to be fastened together. Through a slide in the part 2, a bolt 3 provided with a pair of screwdrivers with two projections 4, 5 formed by a bolt running perpendicularly passes quietly. The lower part 1 has a hole 6 large enough to let through the bolt 3 with its projections 4, 5. Centrally with respect to the hole 6, by means of two rivets 7, 8 in the part 1 a fixed member 9 intended for co-operation with the bolt 3 is arranged. , which is formed by a single thread which is shown in the drawing, is bent so that it forms a U, which in the assembled layer of the fastening device with its shanks 10, 11 encloses the fixed bolt 3 from its spirit. The shanks 10, 11 then first run parallel to the axis of the bolt 3 and are then, as also shown in Fig. 3, bent so that they run helically around the bolt 3 during a little less than half a variation. At the transition between the parallel parts 10, 11 and the helically bent portions, the fastening member has on each side an S-shaped bend 12, 13 intended to hold the projections 4, 5 and thereby, thereby preventing unintentional rotation of the bolt 3. extends to the sides out of the bolt and is rebuilt to eyelets 14, 15, through which the fasteners 7, 8 pass.

Vid anordningens anvandning infores bulten 3 genom halet 6, varvid da bulten kring-aides utsprangen 4, 5 ingripa i fastorganet 9 skrnvformade partier och glida utefter dessa under sammanpressning av delarna 2 och 3, tills utsprangen 4, 5 passerat S-bojningarna 12, 13 och stoppa mot fastorganets parallella partier 10, 11. Genom tradmaterialets fjadring erhalles en elastisk sammanpressning av delarna 1 och 2 och samtidigt uppnas att fastanordningen blir relativt okanslig for variationer i tjockleken hos dessa delar. During use of the device, the bolt 3 is inserted through the tail 6, whereby the bolt is bypassed the projections 4, 5 engage in screw-shaped portions of the fixed member 9 and slide along them while compressing the parts 2 and 3, until the projections 4, 5 pass the S-bends 12, 13 and stop against the parallel portions 10, 11 of the fastener. By the suspension of the wire material an elastic compression of the parts 1 and 2 is obtained and at the same time it is achieved that the fastening device becomes relatively insensitive to variations in the thickness of these parts.

De hopfastade delarna ha ovan forutsatts utgoras av plana platar men del an tydligt, att genom lampligt val av fastbultens langd fiiremal av vilken som helst form och utstraaning kunna hopfastas med anordningen enligt uppfinningen. The fastened parts have above been assumed to consist of flat plates, but it is partly clear that by suitable choice of the length of the fixed bolt of any shape and radiance it can be fastened together with the device according to the invention.

Claims

Patent claim:

A fastening device for fastening parts laid on top of each other, comprising a rotatable bolt provided with a projection, arranged to co-operate with a 2 - wire acting as a fastening member, which comprises parts which have a small relation in relation to the axial direction of the bolt, tract at its innermost part forms a chip bolt from its spirit comprising U.

Fastening device according to patent claim 1, characterized in that the shanks on said U serve as a stopping means for co-operation with said projections in and for limiting the rotational movement of the bolt.

Fastening device according to any one of the preceding patent claims, characterized in that the shanks on said U yid the transition to the inclined parts have a shaped bend in order to prevent the unintentional loosening of the fastening device. Stockholm 1948. Kong !. lioktr. P. A. "Icorstult Silner 450089