DK152979B

DK152979B - Wheel center

Info

Publication number: DK152979B
Application number: DK675674AA
Authority: DK
Inventors: William Neil Wells; Peter Maurice Fisher; James Akira Matsumiya
Original assignee: Tsb Int Nv
Priority date: 1974-01-04
Filing date: 1974-12-20
Publication date: 1988-06-06
Also published as: DK152979C; BR7410958D0; CH587734A5; AU7704174A; NL7500025A; DD118397A6; NL183173B; IT1049230B; NL183173C; DE2461693B2; DE2461693C3; IE40853B1; NO744638L; IE40853L; DE2461693A1; SE7416262L; DK675674A

Description

DK 152979BDK 152979B

Opfindelsen angår en hjulfælg af den art, der er udformet med en bund, to vulstholdeflanger på hver sin side af bunden, to vulstsæder for respektive dækvulster ved vulstflangerne, en i omkredsretningen løbende fordybning, der i bunden er placeret aksialt mellem vulstsæderne og strækker sig radialt indad i forhold til vulstsæderne, og hvor flangerne, bunden og fordybningen er af stål, og med et aftageligt lukkeorgan for fordybningen, hvilket lukkeorgan er indrettet til at udfylde i hvert fald fordybningsåbningens munding og fastgøres i denne ved hjælp af holdeorganer, der tjener til at hindre forskydning af lukkeorganet i radial- og periferiretningen.The invention relates to a wheel rim of the type formed with a bottom, two bead retaining flanges on each side of the bottom, two bead seats for respective tire beads at the bead flanges, a circumferential recess located at the bottom axially between the bead seats and extending radially inwardly relative to the bead seats, and wherein the flanges, bottom and recess are of steel, and with a removable recess for said recess, said closure means adapted to fill at least the opening of said recess and secured thereto by means of retaining means which serve to preventing displacement of the closure member in the radial and circumferential directions.

I sådanne hjulfælge bruges en sådan fordybning til montering DK 152979 B' 2 eller demontering af et pneumatisk da& på faalgen, og lukkeorganet monteres aftageligt i det mindste i mundingen af fordybningen, så at hele fordybningen afspærres for dækvulsterne. Hvis dækket således tilfældigvis mister luften, kan dets vulster ikke træde ind i fordybningen, og dækket kan ikke gå af fælgen. Dette problem og et tidligere forslag til løsning af det er omtalt og beskrevet i den tidligere danske patentansøgning nr. 2337/73.In such wheel rims such a recess is used for mounting DK 152979 B '2 or disassembly of a pneumatic then & on the rim, and the closure means is removably mounted at least in the mouth of the recess so that the entire recess is blocked off for the tire bumps. Thus, if the tire happens to lose air, its bumps cannot enter the recess and the tire cannot go off the rim. This problem and a previous proposal to solve it are discussed and described in the previous Danish patent application no. 2337/73.

Det viser sig, at der er problemer i forbindelse med nøjagtig og fast montering af fordybningens lukkeorgan, navnlig i aksial-retningen, hvis lukkeorganét er en brudt cylindrisk ring, der er vist som den foretrukne udførelsesform i den nævnte ansøgning, og hvis hjulfælgen er af stål. Det har ikke vist sig muligt i praksis at bearbejde et passende sæde for kanterne af den plane, cylindriske ring ved mundingen af fordybningen i en stålfælg.It turns out that there are problems with accurate and fixed mounting of the recess closure means, in particular in the axial direction, if the closure member is a broken cylindrical ring shown as the preferred embodiment of said application and the wheel rim is of steel. In practice, it has not been possible in practice to process a suitable seat for the edges of the planar cylindrical ring at the mouth of the recess in a steel rim.

Fra beskrivelsen til DK ans. nr. 6594/73 kender man en fælg-konstruktion, hvor de nævnte problemer med nøjagtig og fast montering af lukkeorganet løses ved dels at udforme fordybningens sidevægge med en afsats i hver side, dels at udforme lukkeorganet som et rundtgående U-formet profil, hvis radialt indad bukkede sidekanter hviler på hver sin afsats i den pågældende sidevæg af fordybningen. Denne løsning kræver imidlertid en ganske speciel udformning af fordybningens tværsnitsform og indebærer, at formningen af lukkeprofilet med radialt indad bukkede sidekanter i hovedsagen vinkelret på selve profilets bund næppe kan undgå at bevirke bølgning eller folddannelse på disse sidekanter, hvilket igen indebærer risiko for, at lukkeprofilet kommer til at sidde lidt skævt eller fast i sin fordybning.From the description to DK ans. No. 6594/73, a rim structure is known in which the said problems of accurate and fixed mounting of the closure member are solved by first forming the side walls of the recess with a ledge on each side and partly by forming the closure member as a circumferential U-shaped profile if radially inwardly curved side edges rest on each ledge in the respective side wall of the recess. However, this solution requires a very special design of the cross-sectional shape of the recess and implies that the forming of the closure profile with radially inwardly curved side edges, generally perpendicular to the bottom of the profile itself, can hardly avoid causing corrugation or folding on these side edges, which in turn implies the risk of the closing profile. is going to get a little lopsided or stuck in its recess.

Opfindelsen adskiller sig fra denne kendte teknik ved, at fordybningen set i et vilkårligt radialt plan gennem fælgen i hovedsagen har trapezformet tværsnit med radialt indad konvergerende trapezsider, og at lukkeorganet i det mindste stedvis over fordybningens omkreds udviser i et til det pågældende sted svarende radialt plan en i hovedsagen trapezlignende form svarende til fordybningens tværsnitsform.The invention differs from this prior art in that the recess, seen at any radial plane through the rim, generally has trapezoidal cross-sections with radially inward converging trapezoidal sides, and that the closure member exhibits, at least in some places above the perimeter of the recess, in a radial plane corresponding to that location. a substantially trapezoid-like shape corresponding to the cross-sectional shape of the recess.

Denne særlige udformning af fælgen og af lukkeorganet sikrer en væsentlig nemmere fabrikation, idet fordybningen ikke længere behøver at udformes med de nævnte afsatser i sine sidevægge, medens lukkeorganet nemmere kan udformes med den ønskede profil, der ifølge diverse nedenfor nærmere beskrevne udførelsesformer eksempelvis kan fremstilles ved udstansning og bukning.This particular design of the rim and of the closure means ensures a considerably easier fabrication, the recess no longer having to be formed with said ledges in its side walls, while the closure means can be more easily formed with the desired profile which according to various embodiments described below can be produced, for example, by punching and bending.

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Opfindelsen forklares nærmere i det følgende under henvisning til tegningen, hvor fig. 1 viser et delvis gennemskåret perspektivbillede af et hjul med en fælg og et derpå monteret slangeløst dæk, fig. 2 et snit i den ene side af den øvre del af et hjul til et køretøj med en presset stålfælg, et dæk og et lukkeorgan monteret 1 fælgen, fig. 3 et perspektivbillede af et lukkeorgan, fig. 4 og 5 snit efter henholdsvis linierne A-A og B-B i fig. 3, fig. 6 et perspektivbillede af en anden udførelsesform for et lukkeorgan, fig. 7 et perspektivbillede af en del af et tredje lukkeorgan, fig. 8 en skematisk tegning af en del af båndét i fig. 7 samlet med en anden sådan del, fig. 9 et perspektivbillede af en fjerde udførelsesform for et lukkeorgan, fig. 10 et skematisk billede af det fjerde lukkeorgan, delvis adskilt, fig. 11 et vandret billede af et alternativt holdeorgan for det fjerde lukkeorgan, fig. 12 et perspektivbillede af en femte udførelsesform for et lukkeorgan, og fig. 13 et radialt snitbillede gennem en del af en fælg med enten det andet, det tredje eller det fjerde lukkeorgan i stilling.The invention will be explained in more detail below with reference to the drawing, in which fig. 1 is a partially sectioned perspective view of a wheel with a rim and a tubeless tire mounted thereon; FIG. 2 shows a section in one side of the upper part of a wheel for a vehicle with a pressed steel rim, a tire and a closing member mounted in the rim; FIG. 3 is a perspective view of a closing member; FIG. 4 and 5, respectively, along lines A-A and B-B in FIG. 3, FIG. 6 is a perspective view of another embodiment of a closure means; FIG. 7 is a perspective view of a portion of a third closure member; FIG. 8 is a schematic drawing of a portion of the tape of FIG. 7 together with another such part; FIG. 9 is a perspective view of a fourth embodiment of a closure means; FIG. 10 is a schematic view of the fourth closure member, partially separated; FIG. 11 is a horizontal view of an alternative holding means for the fourth closure means; FIG. 12 is a perspective view of a fifth embodiment of a closure means; and FIG. 13 is a radial sectional view through a portion of a rim with either the second, third, or fourth closure members in position.

I fig. 1 og 2 er vist et hjulnav 1 med en presset stålfælg 2 langs yderperiferien. Fælgen har vulstsædedele 3 og 4 ved bunden, der ligger ved vulstflanger 5 og 6, der hver har aksialt udadvendende flangekanter 7 og 8. Mellem vulstsædedelene 3 og 4 er der en cylindrisk del af bunden 9 af fælgen, til hvis ene side der er en kontinuerlig, ringformet fordybning 10. Mellem fordybningen 10 og vulstsædedelen 4, der fører til den nærmeste flange 6, er der en ophøjet rand 11 ved overgangen mellem den ene af væggene 12 og vulstsædedelen 4. Den modstående væg 13 i fordybningen strækker sig fra den cylindriske del 9 af fælgen til bunden 14 af fordybningen. Væggene 12 og 13 er keglestubformede ringflader og hælder under en vinkel a, i dette tilfælde 15° i forhold til et plan vinkelret på rotationsaksen for fælgen, når den befinder sig på et hjul. Der kan også anvendes andre hældningsvinkler, og disse vil sædvanligvis være stejlere, dvs. vinklen α 4In FIG. 1 and 2 are shown a wheel hub 1 with a pressed steel rim 2 along the outer periphery. The rim has bead seat portions 3 and 4 at the bottom, located at bead flanges 5 and 6, each having axially outward flange edges 7 and 8. Between the bead seat portions 3 and 4, there is a cylindrical portion of the bottom 9 of the rim, to one side of which there is a continuous annular recess 10. Between the recess 10 and the bead seat 4 leading to the nearest flange 6, there is a raised rim 11 at the junction between one of the walls 12 and the bead seat 4. The opposite wall 13 of the recess extends from the cylindrical part 9 of the rim to the bottom 14 of the recess. The walls 12 and 13 are cone-shaped annular surfaces and incline at an angle α, in this case 15 ° relative to a plane perpendicular to the axis of rotation of the rim when it is on a wheel. Other inclination angles can also be used and these will usually be steeper, ie. the angle α 4

DK 152979BDK 152979B

vil være mindre end 15°.will be less than 15 °.

Ved brugen af fælgen monteres vulsterne 20 og 21 af et slangeløst dæk efter hinanden på fælgen ved efter hinanden at optage en del af den ubrudte fordybning 10 på kendt måde. Den ophøjede rand 11 hjælper med til at hindre tilfældig forskydning tilbage i fordybningen af vulstdelen 21. Eftersom det med opfindelsen tilsigte at anvende slangeløse dæk, har fælgen kun én gennemgående åbning, der fortrinsvis er i væggen i fordybningen, og denne åbning optages af opbl'æsningsventilen.When using the rim, the beads 20 and 21 of a tubeless tire are mounted one after the other by successively taking up part of the unbroken recess 10 in a known manner. The raised rim 11 assists in preventing random displacement back into the recess of the bead portion 21. Since the invention intends to use tubeless tires, the rim has only one through-opening, which is preferably in the wall of the recess, and this opening is taken up by bleeding. æsningsventilen.

X tilfælde af tab af luft, kunne en af vulsterne passere ned i fordybningen med et deraf følgende fuldstændig eller delvis tab af dækket og dermed et alvorligt tab af styring. For at hindre dette er der tilvejebragt et i.lukkeorgan for fordybningen i form af et bånd eller en strimmel 22, der har radialt indad bøjede knaster 23 jævnt fordelt langs periferien og på hver side. Dette skyldes, at materialet i denne fælg ikke er egnet til at give anlæg i bunden af fælgen ved mundingen af fordybningen. I de dele, hvor der ikke er nogen knaster, fig. 4, er båndet en glat cylinder. Båndet hindres i ekspansion i radialretningen ved hjælp af en tangentialt rettet skrue 24, der er i indgreb mellem de to indad bøjede ender 25 og 26 af båndet, idet skruehovedet er tilgængeligt for en skruetrækker, der ér rettet generelt tangentialt gennem en langagtig slids 27 i båndet, så at båndet kan spændes i periferiretningen mod mundingen i fordybningen 10 med knasterne 23 kilet mod sidevæggene 12 og 13, så at lukkeorganet lokaliseres såvel i radialretningen som i sideretningen. Nogle af knasterne kan have en anden højde end andre, dvs. de kan have en højde svarende til hele fordybningens dybde, punkteret linie 28 i fig. 2.In the event of loss of air, one of the bumps could pass into the recess with a consequent complete or partial loss of the tire and thus a severe loss of control. To prevent this, a groove closure means is provided in the form of a band or strip 22 having radially inwardly bent knobs 23 evenly distributed along the periphery and on each side. This is because the material in this rim is not suitable for abutment at the bottom of the rim at the mouth of the recess. In those parts where there are no studs, fig. 4, the belt is a smooth cylinder. The belt is prevented from expanding in the radial direction by a tangentially directed screw 24 which engages the two inwardly bending ends 25 and 26 of the belt, the screw head being accessible to a screwdriver which is generally directed tangentially through a longitudinal slot 27 of the belt. the belt so that the belt can be tensioned in the circumferential direction towards the mouth of the recess 10 with the lugs 23 wedged against the side walls 12 and 13, so that the closing means is located in both the radial and the lateral directions. Some of the studs may have a different height than others, ie. they may have a height corresponding to the entire depth of the recess, dotted line 28 in FIG. 2nd

Efter at dækvulsterne er monteret på fælgbunden ved anvendelse af fordybningen, skubbes begge vulsterne til den ene aksiale side, hen imod flangen 5, så at fordybningen frilægges helt, hvorefter båndet 22 placeres omkring mundingen af fordybningen, og skruen 24 bringes til indgreb mellem dets ender og spændes således, at båndet fastholdes og hindres i at gå løst eller at ekspandere i radial- eller periferiretningen. Den ene viilst 21 skubbes derefter tilbage hen over fælgen og forhøjningen. 11, så at den lejres på vulstsædedelen 24 af bunden, og det slangeløse dæk kan derefter pumpes op.After the tire bumps are mounted on the rim base using the recess, both bumps are pushed to one axial side towards the flange 5 so that the recess is fully exposed, then the band 22 is placed around the mouth of the recess and the screw 24 is engaged between its ends. and tightened so that the belt is retained and prevented from loosening or expanding in the radial or peripheral direction. One of 21 is then pushed back across the rim and the elevation. 11 so that it is stored on the bead seat portion 24 of the bottom and the tubeless tire can then be inflated.

Lukkeorganbåndet kan alternativt have en af de former, der skal beskrives i det følgende.The closure band may alternatively have one of the forms to be described below.

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Den anden udførelsesform er et bånd 110, der er kontinuerligt mellem to ender 111 og 112, der ligger mod hinanden, når båndet er placeret på en fælg, se båndet 110 i fig. 6, dig kan holdes og spændes i periferiretningen ved hjælp af en møtrik og bolt 113, der passerer gennem huller i radialt indad bøjede endeknaster 114 og 115. Alternativeholdeorgane^p og anbringelse af endeknasterne beskrives i forbindelse med yderligere udførelsesformer.The second embodiment is a belt 110 which is continuous between two ends 111 and 112 which lie against each other when the belt is located on a rim, see the belt 110 in FIG. 6, you can be held and tightened in the circumferential direction by means of a nut and bolt 113 passing through holes in radially inwardly bent end bosses 114 and 115. Alternative retaining means and placement of the end bosses are described in connection with further embodiments.

Med mellemrum langs periferilængden af båndet 110 og i en længdemidterdel af dette er der udstanset par af knaster 116, fire par i denne udførelsesform. De afgrænses af snit i midten af båndets bredde, så at der efterlades en kontinuerlig kantdel 117, og bøjes ud fra båndet, så at der dannes knaster, sqm stikker frem radialt indefter under en vinkel på f.eks. 70-90° i forhold til en tangent til båndet ved roden af vedkommende knast. Sidékanterne af hver af tungerne hælder mod hinanden, så at disse sidekanter generelt svarer til hældningen i fordybningen, som knasterne skal stikke ind i, se fig. 13. Omfanget af det indadvendende fremspring af knasterne kan være sådan, at den radialt inderste ende ligger an mod bunden i fordybningen til afgrænsning af den radiale og aksiale stilling af båndet i forhold til denne bund, eller lokaliseringen kan tilvejebringes alene ved anlægget af de radiale kanter af knasterne mod de skrå sidevægge i fordybningen. Sidekanterne af båndet og delene 117 kan være placeret i mundingen af fordybningen, eller de kan som vist i fig. 13 overlappe hosliggende kanter af bunden af fælgen således, at de dækker fordybningen helt, idet knasterne da kun tilvejebringer stop mod forskydning af båndet i sideretningen, aksialretningen.At intervals along the circumferential length of the tape 110 and in a longitudinal center portion thereof, pairs of knobs 116, four pairs in this embodiment are punched. They are bounded by cuts in the middle of the width of the belt, leaving a continuous edge portion 117, and bending out from the belt to form knobs, sqm protruding radially inwards at an angle of e.g. 70-90 ° relative to a tangent to the band at the root of the cam. The lateral edges of each of the tongues are inclined towards each other, so that these lateral edges generally correspond to the inclination of the groove into which the cams should insert, see fig. 13. The extent of the inward projection of the bosses may be such that the radially inner end abuts the bottom of the recess to define the radial and axial position of the belt relative to this bottom, or the location can be provided only by the arrangement of the radial edges of the studs against the oblique side walls of the recess. The lateral edges of the strip and portions 117 may be located in the mouth of the recess, or they may, as shown in FIG. 13, the adjacent edges of the bottom of the rim overlap so as to completely cover the recess, the lugs then only providing stops against lateral displacement of the belt, the axial direction.

De andre former for lukkeorganer, der skal beskrives i det følgende, er i to dele. Et par af hosliggende ender kan være hængslet sammen med permanent periferiafstand fra hinanden, medens det andet par kan være forsynet med holdeorganer til at holde dem udløseligt sammen mod ekspansion i periferiretningen, eller begge ender kan være forsynet med holdeorganer.The other types of closure means to be described below are in two parts. One pair of adjacent ends may be hinged together with permanent peripheral spacing, while the other pair may be provided with holding means for holding them releasably together for expansion in the circumferential direction, or both ends may be provided with holding means.

I den i fig. 7 og 8 viste udførelsesform er et lukkeorgan, f.eks. fremstillet af to halvbånd 120 og 121, der er identiske.In the embodiment shown in FIG. 7 and 8 are a closure means, e.g. made of two identical half bands 120 and 121.

Hver af disse har et par mellemliggende knaster 116 og indad bøjede endeknaster 122, der alle er formet og dimensioneret på passende måde til at fungere som lokaliseringsorganer for båndet, når dette placeres i fordybningen i en fælg. Hver af endeknasterne 120 har en radialt rettet slids 123, hvis radialt yderste ende 6Each of these has a pair of intermediate lugs 116 and inwardly bent end lugs 122, all formed and sized appropriately to act as belt locating means when placed in the groove in a rim. Each of the end studs 120 has a radially directed slot 123 whose radially outer end 6

DK 152979BDK 152979B

er åben og er forbundet med en langs periferien rettet slids 124 i båndparten. Hver af slidserne 124 har en udvidet del 125 ved den ende, der er fjernest fra endeknasten 122. Formen, som er vist i fig. 9 og 10, er svarende hertil. Halve bånd 126 er identiske med hinanden og ligner de halve bånd 120, med undtagelse af at knasterne 116 er udeladt. Endeknasterne 122 har slidser 123, og der er slidser 124 og udvidede dele 125 som i det foregående .is open and is connected to a circumferentially directed slot 124 in the band portion. Each of the slots 124 has an extended portion 125 at the end that is farthest from the end boss 122. The mold shown in FIG. 9 and 10 are similar. Half bands 126 are identical to each other and are similar to half bands 120 except that the lugs 116 are omitted. The end studs 122 have slots 123, and there are slots 124 and expanded portions 125 as above.

Slidserne 123 og 124 er indrettet til at muliggøre indsættelse i radialretningen af et holdeorgan, såsom en bardunstrammer 127, fig. 9, eller en nitte 128, fig. 11. En eller begge udvidelserne 125 muliggør passage i den retning af det udvidede hoved 129 ved den ene ende af skaftet af nitten 128 eller af de udvidede hoveder 130 ved hver ende af skaftet 131 af bardunstrammeren 127. Skaftet 131 af bardunstrammeren består af et par af skruer med gevind i modsatte retninger og i indgreb med en passende gevindskåret bøsning 132. Drejning af bøsningen 132 bevirker ekspansion eller sammentrækning af skaftet, så at hovederne 130 bevæges længere fra hinanden eller tættere til hinanden.The slots 123 and 124 are arranged to enable insertion into the radial direction of a holding member, such as a rope tensioner 127, FIG. 9, or a rivet 128; FIG. 11. One or both of the extensions 125 allow passage in that direction of the extended head 129 at one end of the shaft of the rivet 128 or of the extended heads 130 at each end of the shaft 131 of the rope tensioner 127. The shaft 131 of the rope tensioner consists of a pair of of screws with threads in opposite directions and in engagement with a suitable threaded bushing 132. Turning the bushing 132 causes expansion or contraction of the shaft to move the heads 130 further apart or closer to one another.

Som vist i fig. 8 kan der være monteret bardunstrammere 127 og 127' mellem begge parrene af ender af halve bånd 120 og 121, eller alternativt kan der være et hængselselement i stedet for bardunstrammerne 127', fortrinsvis med samme masse som bardunstrammeren 127. En passende form er vist ved 133 i fig. 9 i form af en dobbelthovedet, stang. Denne kan være anbragt, før de halve bånd 122 bringes hen til fælgen, så at den kan sættes på fælgen i den i fig. 10 viste stilling og derefter lukkes.As shown in FIG. 8 there may be mounted stretcher tensioner 127 and 127 'between both pairs of ends of half straps 120 and 121, or alternatively there may be a hinge member in place of the stretcher tensioner 127', preferably of the same mass as the strut tensioner 127. A suitable shape is shown by 133 in FIG. 9 in the form of a double-headed, rod. This may be disposed before the half strip 122 is brought to the rim so that it can be mounted on the rim of the rim of FIG. 10 and then close.

Hvis de halve bånd på forhånd er hængslet sammen, kan de alternativt monteres fra modstående radiale retninger i anlæg, med fordybningen, og holdeorganerne kan indsættes fra modstående radiale retninger, som er under 90° i forhold til de førstnævnte retninger, ved hvert par af hosliggende ender af halvbånd.Alternatively, if the half bands are pre-hinged together, they may be mounted from opposite radial directions in abutment, with the recess, and the retaining means may be inserted from opposite radial directions less than 90 ° to the former directions at each pair of adjacent ends of half band.

Derefter forkortes skaftet på bardunstrammeren 127 · således, at hovederne 130 ikke længere ligger ud for udvidelserne 125, så at de ikke længere kan undslippe i radialretningen, men kommer til at ligge an på de modsatrettede flader af knasterne 122 med slidserne 123. De holder således knasterne og dermed båndet sammen under periferispænding, når dette placeres på fælgen.Thereafter, the shaft of the barrel tensioner 127 is shortened so that the heads 130 no longer lie beyond the extensions 125 so that they can no longer escape in the radial direction but abut the opposite faces of the bosses 122 with the slots 123. They thus hold the pins and thus the band together under peripheral tension when placed on the rim.

Hvis der anvendes holdeorganer, såsom en nitte 128, kan denne igen indsættes fra en radial retning, og derefter kan der udIf retaining means such as a rivet 128 are used, it can again be inserted from a radial direction, and then

Claims

A wheel rim of the type formed with a bottom (9), two bead retaining flanges (5, 6) on each side of the bottom, two bead seats (3, 4) for respective tire bumps (20, 21) at the bead flanges, one in the circumferential direction, grooves (10) located at the bottom axially between the bead seats and extending radially inward with respect to the bead seats, and in which the flanges, bottom and recesses are of steel, and with a removable closing member (22, 126, 143) for the recess, which closure means is adapted to fill at least the mouth of the recess opening and is fixed therein by means of retaining means which serve to prevent displacement of the closing member in the radial and peripheral direction, characterized in that the recess (10) is seen in any radial plane through the rim in the main case has a trapezoidal cross-section with radially inwardly converging trapezoidal sides, and that the closure means (22, 126, 143) exhibits at least somewhere above the circumference of the recess (10) radially corresponding to that location plan a substantially trapezoid-like shape corresponding to the cross-sectional shape of the recess (10). DK 152979 B;

Wheel rim according to claim 1, characterized in that the closing means is formed with lugs (23; 116; 122) arranged to abut against the side walls (12, 13) of the recess.

Wheel rim according to claim 1 or 2, characterized in that the closure means is formed as a belt (22) with a cylindrical part whose radially outer side has at least the same diameter as the bottom (9) of the rim, and with radially inwardly directed cam parts ( 23) which is bent in from the cylindrical portion along each of its lateral edges.

Wheel rim according to claim 3, characterized in that the lugs (23) are bent at an angle a which corresponds substantially to the angle of inclination of the side walls of the recess (10).

Wheel rim according to claim 4, characterized in that the lugs (23) or some of them extend only inwardly to about half the depth of the recess (10).

Wheel rim according to claim 1 or 2, characterized in that the closure means has radially inwardly directed lugs (116, 122) which are bent inwardly from the cylindrical portion from its longitudinal center portion.

Wheel rim according to claim 6, characterized in that the lugs (122) or some of them lie near the ends of the belt and engage the belt retaining means (127, 333).

7 Enlarged end 134 is formed on the shaft so that the lugs 122 are held together. The rivet can be a pop rivet with a hollow shaft. Although the use of a rivet is advantageous during assembly on conveyor belts, the ribbons are only releasable upon destruction of the rivet. The embodiments described with reference to FIG. 7-11 can be used for automatic or semi-automatic mounting steps in line fabrication. In FIG. 12 is shown how a closure member for a steel wheel rim can take the form of a pair of solid half rings 140 hinged at 141 at a pair of adjacent ends by a permanent interlock between loop-shaped ends of a pair of core wires, cables or strip 142, encased in substantially semicircular elements 143 of rubber or similar material, which are sized and have a cross-sectional shape suitable for accommodating and filling the recess in a rim so that the sidewalls 146 and bottom 147 abut against the side walls and bottom «of the recess. Loop-shaped ends 144 of the core wires 142 are held together by hooks on a rope tensioner 145 similar to the rope tensioner 127. There may be a counterweight for balancing the rope tensioner 145 at or between the ends 141.

Wheel rim according to any one of the preceding claims, characterized in that the belt (120, 126) consists of several parts, e.g. two parts which can be applied to the rim from each radial direction.

Wheel rim according to claim 1, characterized in that the closure means consists of a preferably two-part profile (146) consisting of solid, flexible material and in which a longitudinal wire (142) is arranged arranged at its ends by means of a curtain rods (145) to be tensioned in the longitudinal direction of the recess (10).