DK173358B1

DK173358B1 - Duct having rectangular cross section

Info

Publication number: DK173358B1
Application number: DK361984A
Authority: DK
Inventors: Robert Roy Heilman; Howard Joseph Mcelroy
Original assignee: Lockformer Co; Iowa Prec Ind Inc
Priority date: 1984-07-24
Filing date: 1984-07-24
Publication date: 2000-08-14
Also published as: DK361984D0; DK361984A

Description

% i DK 173358 B1% in DK 173358 B1

Kanal med firkantet tværsnitChannel with square cross section

Opfindelsen angår en kanal med firkantet tværsnit med ka-nalsektioner af metalplade, og et arrangement til forbin-5 delse af disse. Opfindelsen omhandler især en samling af den art, som indbefatter rammeelementer afgrænset af flanger beliggende ved en kanalende med tilstødende rammeelementer sammenføj et med hinanden ved hjælp af hjørne-vinkelstykker.BACKGROUND OF THE INVENTION The invention relates to a square cross-sectional channel having metal sections of channel plate and an arrangement for connecting them. In particular, the invention relates to a joint of the type which includes frame members defined by flanges located at a channel end with adjacent frame members joined to one another by means of corner angles.

1010

Den kendte teknik, især USA patentskrift nr. 3 712 650 og USA patentskrift nr. 4 218 079 beskriver flangeforbindelserne til at forbinde enderne af rektangulære luftkonditioneringskanaler. Disse arrangementer indbefatter flan-15 gepartier med et horisontalt benparti fastgjort til endepartiet af kanalen og et vertikalt rilleformet ben til at modtage armene fra et hjørnevinkelstykke.The prior art, in particular U.S. Patent No. 3,712,650 and U.S. Patent No. 4,218,079, discloses the flange connections for connecting the ends of rectangular air conditioning ducts. These arrangements include flange portions with a horizontal leg portion attached to the end portion of the channel and a vertically grooved leg to receive the arms from a corner angle piece.

I US patentskriftet nr. 3 712 650 har hjørnevinkelstyk-20 kerne armpartier, som strækker sig ind i en åbning i det vertikale ben. Armpartierne er således dimensioneret vertikalt, at den nederste overflade af armene ligger an mod den nederste væg af den horisontale flange. Med dette arrangement ligger kanalvæggens ende an eller hviler mod en 25 overflade af hjørnevinkelarmen, der strækker sig ind i den rilleformede åbning.In U.S. Patent No. 3,712,650, corner angle pieces have arm portions extending into an opening in the vertical leg. The arm portions are so dimensionally vertical that the lower surface of the arms abuts the lower wall of the horizontal flange. With this arrangement, the end of the channel wall abuts or rests against a surface of the corner angle arm extending into the groove opening.

Ifølge US patentskriftet nr. 4 218 079 tilvejebringes også flangepartier med et opretstående rilleformet benparti 30 med en forvæg og en bagvæg, som danner en på langs gående åbning derimellem, og et kanalmodtagende benparti med en oversidevæg og en bundvæg. Et hjørnestykke kan indsættes i længdeåbningen, og der er også sørget for en pakning anbragt i længdeåbningen stødende op til den kanalmodta-35 gende benbundvæg. Pakningen er beregnet til at anbringes DK 173358 B1 2 mellem kanalendepartiet og den øverste side af den kanalmodtagende benbundvæg for at forbinde kanalendepartiet tætnende til rammeflangepartiet.US Patent No. 4,218,079 also provides flange portions having an upright groove leg portion 30 with a front wall and a back wall forming a longitudinal opening therebetween and a channel receiving leg portion with an upper wall and a bottom wall. A corner piece may be inserted into the longitudinal opening, and a gasket is also provided in the longitudinal opening adjacent to the duct-receiving leg bottom wall. The gasket is intended to be placed between the channel end portion and the upper side of the channel receiving bone bottom wall to connect the channel end portion sealingly to the frame flange portion.

5 I arrangementerne ifølge ovennævnte to USA patentskrifter anvendes bolte eller lignende til at fastgøre hjørnestykkerne på den ene kanalende til hjørnestykkerne på en tilstødende kanalende. En passende klemme kan så snappes på plads ved de yderste ender af tilstødende rammer ved de 10 respektive kanalender. De samlinger, der således opnås har tilstrækkelig styrke; imidlertid involveres en stor mængde samlingstrin, som kræver dygtighed og erfaring, for at opnå denne samling.In the arrangements of the above two United States patents, bolts or the like are used to attach the corner pieces on one channel end to the corner pieces on an adjacent channel end. A suitable clamp can then be snap into place at the outer ends of adjacent frames at the 10 respective calendar. The collections thus obtained have sufficient strength; however, a large amount of assembly steps, which require skill and experience, are involved to achieve this assembly.

15 USA patentskriftet nr. 3 443 601 beskriver et andet arrangement til sammenføjning af kanalender. I overensstemmelse med denne lære formes rammelignende partier som integrerede dele af en kanalende, og klemmer eller fremspringende kanter er tilvejebragt for indgreb med tilstø-20 dende rammelignende partier. De rammelignende partier og/eller klemmerne er udformet således, at en fjedrende forbindelse opnås med tanke på at sikre en tilfredsstillende sammenføjning. Selv om dette arrangement involverer færre samlingstrin, er samlingsoperationen vanskelig, og 25 arrangementet er ikke fuldt tilfredsstillende ud fra et spørgsmål om styrke.U.S. Patent No. 3,443,601 discloses another arrangement for joining calendar. In accordance with this doctrine, frame-like portions are formed as integral portions of a channel end, and clamps or protruding edges are provided for engagement with adjacent frame-like portions. The frame-like portions and / or clamps are designed such that a resilient connection is obtained in order to ensure a satisfactory joining. Although this arrangement involves fewer assembly steps, the assembly operation is difficult and the event is not fully satisfactory from the point of view of strength.

I overensstemmelse med opfindelsen samles rammer og hjørneforbindelsesled ved en kanalende med tilsvarende rammer 30 og hjørneforbindelsesled fra en tilstødende kanal-ende. Samlingen fuldføres ved hjælp af bolte eller lignende fastgørelseselementer på konventionel måde, som det forklares nærmere nedenfor. 1In accordance with the invention, frames and corner joints are assembled at a channel end with corresponding frames 30 and corner joints from an adjacent channel end. The assembly is completed by means of bolts or similar fasteners in a conventional manner, as explained in more detail below. 1

t It I

Det fra US patent nr. 3 199 901 kendte flangearrangement er fremstillet og udformet ganske anderledes end arrange- DK 173358 B1 3 mentet ifølge opfindelsen, idet hver af flangerne er særskilte dobbelte flanger, som er forbundet med selve kanalvæggen ved hjælp af nitter. Dette er langt mere betænkeligt end at tildanne en enkelt flange direkte ud fra 5 kanalvæggens plademateriale, og nittesamlingen udgør heller ikke i sig selv nogen lufttæt samling. Heller ikke hjørnebeslagene er udformet og fastholdt på samme måde som ifølge opfindelsen.The flange arrangement known from US Patent No. 3,199,901 is manufactured and designed quite differently from the arrangement according to the invention, each of the flanges being separate double flanges connected to the channel wall itself by means of rivets. This is far more apprehensive than forming a single flange directly from the plate material of the duct wall, and the rivet assembly does not in itself constitute an airtight joint. Also, the corner fittings are not designed and retained in the same way as according to the invention.

10 Ifølge opfindelsen dannes rammen som en integreret del af en kanalvæg profilvalset ud i ét med denne. Rammen afgrænser et første parti, der strækker sig vinkelret udad fra kanalvæggen, og et andet parti, der er bøjet bagud til en position modsat en endeparti af kanalvæggen. I den 15 foretrukne form for opfindelsen afgrænser det bagudbøjede andet parti og det modsat vendende endeparti af kanalvæggen modsatte riller. Sidekanterne af en arm af et hjørneforbindelseselement er indrettet til at snappe ind i position i disse riller for at sikre samlingen af hjørne-20 forbindelseselementerne i forhold til en ramme. Efter at denne samling er fuldført, kan en kanalende let sammenføjes med en tilstødende kanalende ved hjælp af ovenfor nævnte bolte. Denne samling er enklere og mere tæt end de nævnte kendte.According to the invention, the frame is formed as an integral part of a channel wall profile rolled together with it. The frame defines a first portion extending perpendicularly outward from the channel wall and a second portion bent backward to a position opposite an end portion of the channel wall. In the preferred form of the invention, the rearwardly bent second portion and the opposite end portion of the channel wall define opposite grooves. The side edges of an arm of a corner connecting member are arranged to snap into position in these grooves to secure the assembly of the corner connecting members with respect to a frame. After this assembly is completed, a channel end can be easily joined to an adjacent channel end by the above-mentioned bolts. This collection is simpler and more dense than the known ones.

2525

Opfindelsen involverer også forbedringer i hjørneforbindelseselementer. Et. hjørneforbindelseselement er blevet udformet, som forstærker den ønskede låseaktion, mens den samtidigt tilvejebringer et passende arrangement for sam-30 lingen. Hjørneforbindelseselementerne udgør også et hjælpemiddel til at holde spillerum og åbninger i samleområ-det mindst mulige. Endelig indbefatter forbindelseselementerne fortrinsvis passende fastgøringsmidler for stivere, når sådanne ekstra elementer er ønskelige.The invention also involves improvements in corner connection elements. One. corner connection member has been designed which amplifies the desired locking action while at the same time providing a suitable arrangement for the assembly. The corner connection elements also provide a means of keeping clearance and openings in the assembly area as small as possible. Finally, the connecting elements preferably include suitable fasteners for struts when such additional elements are desirable.

35 _________ DK 173358 B1 435 _________ DK 173358 B1 4

Profilvalsningen af kanalenderne for at tilvejebringe den integrerede ramme, indsnapning af hjørneforbindelseselementerne i position samt den efterfølgende boltoperation omfatter trin, som kan præfabrikeres hurtigt og uden be-5 hov for stor færdighed. Lige vigtigt er det faktum, at den resulterende kanalsamling kendetegnes ved stor styrke, således at en højst pålidelig samlingsoperation kan fuldføres med minimumudgift og -arbejdsindsats. Om ønsket kan et spændebånd anbringes rundt om de tilstødende ram-10 mer af til hinanden grænsende kanaler. Pakningsmateriale kan også anbringes mellem tilstødende rammer uden vanskelighed.The profile rolling of the channel calendars to provide the integrated frame, snap-in corner positioning elements, and the subsequent bolt operation include steps which can be prefabricated quickly and without great skill. Equally important is the fact that the resulting channel assembly is characterized by great strength, so that a highly reliable assembly operation can be completed with minimum expense and work effort. If desired, a strap can be placed around the adjacent frames of adjacent channels. Packing material can also be placed between adjacent frames without difficulty.

Opfindelsen vil nu blive forklaret nærmere under henvis-15 ning til tegningen, på hvilken: fig. 1 er et perspektivisk delbillede af en kanalsamling ifølge opfindelsen, 20 fig. 2 er et forstørret, fragmentarisk tværsnit af en kanalsamling taget langs linien 2-2 i fig. 1, fig. 3 er et planbillede af et hjørneforbindelseselement af den type, som fortrinsvis bruges i forbindelse med ka-25 nalsamlingen ifølge opfindelsen, fig. 4 er et fragmentarisk billede af et kanalemne specielt udformet for gennemførelse af opfindelsen, 30 fig. 5 er et planbillede af en hjørneforbindelsesstruktur med forbedrede træk, fig. 6 viser forbindelseselementet fra fig. 5, taget fra den ene side af elementet, 35 DK 173358 B1 5 fig. 7 viser forbindelseselementet fra fig. 5, taget fra den anden side af elementet, fig. 8 er et horisontalt snit taget omkring linien 8-8 i 5 fig. 5, fig. 9 er et snit taget omkring linien 9-9 i fig. 5, fig. 10 er et snit taget omkring linien 10-10 i fig. 5, 10 fig. 11 er et fragmentarisk snit, som viser hjørneforbin-delseseleroentet fra fig. 5 som en del af en kanalsamling, fig. 12 er et fragmentarisk billede fra siden af kanal-15 samlingen i fig. 11, fig. 13 er et tværsnit taget omkring linien 13-13 i fig.The invention will now be explained in more detail with reference to the drawing, in which: FIG. 1 is a perspective view of a channel assembly according to the invention; FIG. 2 is an enlarged fragmentary cross-section of a channel assembly taken along line 2-2 of FIG. 1, FIG. Figure 3 is a plan view of a corner connector element of the type preferably used in connection with the channel assembly of the invention; Figure 4 is a fragmentary view of a channel blank specially designed for carrying out the invention; 5 is a plan view of a corner connection structure with improved features; FIG. 6 shows the connecting element of FIG. 5, taken from one side of the element, FIG. 7 shows the connecting element of FIG. 5, taken from the other side of the element; FIG. 8 is a horizontal sectional view taken along line 8-8 of FIG. 5, FIG. 9 is a sectional view taken along line 9-9 of FIG. 5, FIG. 10 is a sectional view taken along line 10-10 of FIG. 5, 10 FIG. 11 is a fragmentary sectional view showing the corner connection selector of FIG. 5 as part of a channel assembly; FIG. 12 is a fragmentary side view of the channel assembly of FIG. 11, FIG. 13 is a cross-sectional view taken along line 13-13 of FIG.

11, 20 fig. 14 er et tværsnit visende en stiverudformning taget omkring linien 14-14 i fig. 11, og fig. 15 er et fragmentarisk tværsnit visende stiverudformningen .11, 20 FIG. 14 is a cross-sectional view showing a strut configuration taken along line 14-14 of FIG. 11, and FIG. 15 is a fragmentary cross-section showing the strut configuration.

2525

Fig. 1 viser en serie af kanaler 10 af den type, som typisk bruges til opvarmnings- og ventileringsformål. Kanalerne er samlet ved hjælp af kanalendesamlingsorganet 12.FIG. 1 shows a series of ducts 10 of the type typically used for heating and ventilation purposes. The channels are assembled by means of the channel collecting means 12.

Typisk bruges sådanne samlingsorganer ved forholdsvis 30 store kanaler af den type, som benyttes til kommercielle - og industrielle anvendelser. Hvor spændvidden mellem ka naler er forholdsvis lang, kan stivere benyttes mellem kanalsamlingsorganerne. 1Typically, such assemblies are used by relatively large channels of the type used for commercial and industrial applications. Where the span between channels is relatively long, stiffeners may be used between the channel joining means. 1

Fig. 4 viser et kanalemne 14 af den type, som påtænkes brugt ved den praktiske udførelse af opfindelsen. Dette DK 173358 B1 6 emne er beregnet til at blive foldet langs linierne 16 for at opnå den rektangulære konfiguration i fig, 1. De respektive ender 18 og 20 af emnet er tilpasset til at formes på en sådan måde, som vil blive beskrevet, hvorved 5 enden af en kanal formet af et emne kan sammenføjes enden af en anden kanal.FIG. 4 shows a channel blank 14 of the type contemplated for use in the practice of the invention. This workpiece is intended to be folded along the lines 16 to obtain the rectangular configuration of Fig. 1. The respective ends 18 and 20 of the workpiece are adapted to be shaped in such a manner as will be described, 5 the end of a channel formed by a blank can be joined to the end of another channel.

Fig. 2 viser i tværsnit den ved valsning formede ende 18 på en kanal og den tilsvarende ende 20 på en tilstødende 10 kanal. Valseoperationen til opnåelse af denne konfiguration kan udføres på kendt udstyr, f.eks. udstyret af den type, der er beskrevet i US patentskrift nr. 4 045 989.FIG. 2 shows in cross-section the rolling end 18 of a channel and the corresponding end 20 of an adjacent 10 channel. The rolling operation to achieve this configuration may be performed on known equipment, e.g. equipment of the type disclosed in U.S. Patent No. 4,045,989.

Hver af de formede ender 18 og 20 omfatter et opadrettet 15 parti 22, der strækker sig vinkelret fra kanalvæggen.Each of the shaped ends 18 and 20 comprises an upwardly facing portion 22 extending perpendicularly from the channel wall.

Et andet parti 24 er bøjet bagud, hvorved dette parti 24 strækker sig modsat et parti af kanalvæggen. Et tilbagegående parti 26 er også frembragt, og en vulst 28 er for-20 met på samme gang.Another portion 24 is bent backwardly, thereby extending this portion 24 opposite a portion of the channel wall. A receding portion 26 is also provided and a bead 28 is formed at the same time.

Kombinationen af det udadgående parti 22 og det bagud-gående parti 24 omfatter en ramme formet integralt med kanalvæggen. I en foretrukken udførelsesform for opfin-25 delsen er en rille 30 formet mellem vulsten 28 og partiet 22, og en lignende rille 32 er formet i kanalvæggen modsat rillen 30. Et hjørneforbindelseselement 34 definerer kanter 36 og 38, som kan modtages af de respektive riller .The combination of the outward portion 22 and the outward portion 24 comprises a frame integrally formed with the channel wall. In a preferred embodiment of the invention, a groove 30 is formed between the bead 28 and the portion 22, and a similar groove 32 is formed in the channel wall opposite the groove 30. A corner connecting member 34 defines edges 36 and 38 which can be received by the respective grooves .

3030

Hjørneforbindelseselementet 34 er vist mere detaljeret fig. 3. Elementet omfatter fortrinsvis en støbt eller smedet del, som kan overfladebearbejdes for at opnå kanterne 36 og 38. Dette element er fortrinsvis af et for-35 holdsvis stift metal, medens plademetallet, der udgør kanalen og den integrale ramme fortrinsvis er af forholds-The corner connector element 34 is shown in more detail in FIG. 3. The element preferably comprises a molded or forged part which can be surface worked to obtain the edges 36 and 38. This element is preferably of a relatively rigid metal, while the sheet metal constituting the channel and the integral frame is preferably of relative thickness.

! I! IN

7 DK 173358 B1 vis elastisk materiale. Med denne kombination er hjørneforbindelseselementet egnet til at snappe på plads ved at man placerer hjørneforbindelseselementets kant 38 i rillen 30 og derpå driver kanten 36 mod partiet 22 for at 5 indføre kanten 36 i rillen 32.7 DK 173358 B1 show elastic material. With this combination, the corner connector is suitable for snapping into place by placing the corner connector 38 of the corner connector and then driving the edge 36 against the portion 22 to insert the edge 36 into the groove 32.

Som vist i fig. 3 består hjørneforbindelseselementet 34 af vinkelret udgående arme. I samlingen, der er vist i fig.l vil det ses, at hjørneforbindelseselementet vil 10 spænde over adskillelsen mellem tilstødende rammer af en ' kanal. En individuel samling af kanalerne vil simpelt hen ske ved indsnapning af fire hjørneforbindelseselementer på plads for en given kanalende, og denne operation kan fuldføres manuelt uden behov for værktøj af nogen art.As shown in FIG. 3, the corner connecting member 34 consists of perpendicularly extending arms. In the assembly shown in Fig. 1, it will be seen that the corner connecting element will span the separation between adjacent frames of a channel. An individual assembly of the channels will simply occur by snap-in four corner connector elements in place for a given channel end, and this operation can be completed manually without the need for any tools of any kind.

15 Hvor udstyr af den art, der er beskrevet i nævnte US patentskrift nr. 4 045 989, benyttes, kan de integrale rammer formes automatisk, og kanalen kan let bøjes til den ønskede rektangulære konfiguration. Følgelig fordres hverken meget sofistikeret arbejde eller stor anstrengel-20 se for at opnå den ønskede samling af hjørneforbindelseselementer og rammer.Where equipment of the kind described in the aforementioned U.S. Patent No. 4,045,989 is used, the integral frames may be formed automatically and the channel may be easily bent to the desired rectangular configuration. Accordingly, neither very sophisticated work nor much effort is required to achieve the desired assembly of corner connecting elements and frames.

Når en kanal samles med en anden, bringes de respektive rammer og tilknyttede hjørneforbindelseselementer sammen, 25 og en bolt 40 eller andet passende fastgørelseselement kan anvendes til at fuldføre den ønskede forbindelse. Et bolthul 46 er tilvejebragt i hver hjørneforbindelseselement, og ekstra huller 48 er placerede stødende op til enderne af forbindelsesarmene, således at ekstra fastgø-30 relseselementer kan anvendes, som i dette tilfælde vil strækkke sig gennem rammernes vægge. Forud for færdiggørelsen af denne forbindelse kan en pakning 42 være anbragt mellem de respektive rammepartier til konventionelle formål.When one channel is joined to another, the respective frames and associated corner connection elements are brought together, 25 and a bolt 40 or other suitable fastening element can be used to complete the desired connection. A bolt hole 46 is provided in each corner connecting member, and additional holes 48 are positioned adjacent the ends of the connecting arms so that additional fastening members can be used which in this case will extend through the walls of the frames. Prior to the completion of this connection, a gasket 42 may be disposed between the respective frame portions for conventional purposes.

35 8 DK 173358 B135 8 DK 173358 B1

En klemme 44 er vist i indgreb med rammepartierne af tilstødende kanaler. Denne klemme kan være udformet til at snappe på plads og skal tjene til at tilvejebringe en på ydersiden glat sammenføjning.A terminal 44 is shown to engage the frame portions of adjacent channels. This clamp may be designed to snap in place and should serve to provide an externally smooth joint.

55

Klemmen kan også fungere som forstærkning af sammenføjningen. Figurerne 5-13 viser et hjørneforbindelseselement 50 af en specielt foretrukken udførelse. Dette forbindelseselement indbefatter også vinkelret udgående arme/ og 10 forbindelseselementet er indrettet til at blive indbefattet som en del af kanalsammenføjningen. Som vist i figurerne 11-13 er forbindelseselementet specielt indrettet til brug i forbindelse med kanaler af den type, som tidligere beskrevet, som indbefatter rulleformede ender 18 15 og 20.The clamp can also act as reinforcement of the joint. Figures 5-13 show a corner connection element 50 of a particularly preferred embodiment. This connecting member also includes perpendicularly extending arms and the connecting member is arranged to be included as part of the channel joint. As shown in Figures 11-13, the connecting element is especially adapted for use with channels of the type previously described which include roll-shaped ends 18 15 and 20.

Hvert af hjørneforbindelseselementerne 50 definerer et præget område 52 på en indvendig overflade. Det indadgående prægede område af et hjørneforbindelseselement vil 20 gribe ind i tilsvarende områder af et tilstødende forbindelseselement, når en kanalsammenføjning dannes - se fig.Each of the corner connecting elements 50 defines an embossed area 52 on an inner surface. The inwardly embossed region of a corner connector will engage corresponding areas of an adjacent connector when a channel joint is formed - see FIG.

12. Når bolten 54 spændes, resulterer indgrebet af de prægede områder i anvendelse af trykkræfter ved hjælp af forbindelseselementets arme, og disse trykkræfter virker 25 således, at de trykker de respektive ender 18 og 20 sammen. Trykkræfterne lægges af de respektive armpar på hvert hjørne af de samlede kanaler, så at de giver en meget tilfredsstillende låseaktion. 1 2 3 4 5 6 i12. When the bolt 54 is tightened, the engagement of the embossed areas results in the application of compressive forces by the arms of the connecting element, and these compressive forces act 25 to compress the respective ends 18 and 20 together. The compressive forces are applied by the respective arm pairs on each corner of the assembled ducts to provide a very satisfactory locking action. 1 2 3 4 5 6 i

Hvert af forbindelseselementerne 50 indbefatter også 2 yderkanter 56 på dets arme. Disse kanter strækker sig i 3 vinkel udad fra armene, og kanterne er indrettede til at 4 modtages i rillerne, der er formet af kanalenderne som 5 vist i fig. 13. I praksis anbringes yderkanterne 56 af 6 forbindelseselementerne først i rillerne 30 en skrå stilling, og forbindelseselementerne drejes derefter, så at DK 173358 B1 9 inderkanterne 58 snapper ind på plads i rillerne 32. Vinkelkonfigurationen af kanterne 56 og delenes respektive dimensioner er således, at den massive vulst 28 vil give efter, når forbindelseselementerne snapper ind på plads 5 og derved tilvejebringer meget sikre holdekræfter forbindelseselementerne over for kanalenderne.Each of the connecting members 50 also includes 2 outer edges 56 of its arms. These edges extend at 3 angles outward from the arms and the edges are arranged to receive 4 in the grooves formed by the channel calendars as shown in FIG. 13. In practice, the outer edges 56 of the 6 connecting elements are first placed in the grooves 30 in an oblique position and the connecting elements are then rotated so that the inner edges 58 snap into place in the grooves 32. The angular configuration of the edges 56 and the respective dimensions of the parts are thus: that the solid bead 28 will succumb as the connecting elements snap into place 5, thereby providing very secure holding forces to the connecting elements to the channel calendars.

Forbindelseselementerne 50 kendetegnes også ved en indvendig hjørneflange 60. Denne hjørneflange er til at dæk-10 ke den åbning, som afgrænses ved hvert hjørne 62 af hver kanal. Disse åbninger eller spalter fremkommer nødvendigvis, når kanalemnet klippes for at tilvejebringe de partier, der skal rulleformes til kanalender 18 og 20. Ved at udforme hjørneforbindelseselementet på denne måde hol-15 des den udadgående strømning af luft fra kanalernes indre mærkbart på et minimum.The connecting members 50 are also characterized by an inner corner flange 60. This corner flange is to cover the opening defined at each corner 62 of each channel. These openings or slots necessarily appear when the duct blank is cut to provide the portions to be molded to ducts 18 and 20. By forming the corner joint member in this way, the outward flow of air from the duct interior is noticeably kept to a minimum.

Hver af forbindelseselementernes 50 arme er forsynet med et fortsat øre 64, som kan anvendes til at tilbageholde 20 stivningsdele, som ligger over overfladerne af kanalenderne 18 og 20. En stiver 66 er vist i fig. 11 som et eksempel på den type som kunne tilvejebringes, hvilken stiver omfatter en strimmel af fjederstål eller lignende, hvor indgreb kan ske ved dens ender neden for ørerne 64.Each of the arms of the connecting members 50 is provided with a continuous ear 64 which can be used to hold 20 stiffening members which lie above the surfaces of the channel calendars 18 and 20. A strut 66 is shown in FIG. 11 as an example of the type which could be provided, which strut comprises a strip of spring steel or the like, where engagement can be made at its ends below the ears 64.

25 Ved sine sider gribes stiveren mellem rillerne 30 og 32.25 At its sides, the strut is gripped between grooves 30 and 32.

Især hvis stiveren, har tilstrækkelig længde, vil den antage en korrugeret eller slangebugtet konfiguration som vist i fig. 15, dvs. bøjninger vil være tilstede langs dens længde, og dette vil bidrage til dens afstivningsev-30 neEspecially if the strut is of sufficient length, it will assume a corrugated or hose-curved configuration as shown in FIG. 15, i.e. bends will be present along its length and this will contribute to its stiffness

Den specielle stiver, der er vist, er kun et eksempel på en form passende til et rulleformet tværsnit, og det skal erkendes at andre udformninger kunne anvendes. I den vi-35 ste særlige udformning er enderne af stiveren på fordel- DK 173358 B1 10 agtig måde bragt til at glide under ørerne 64, førend de fastholdes af klemmen 44.The particular strut shown is only one example of a shape suitable for a roll-shaped cross-section, and it should be recognized that other designs can be used. In the fourth particular embodiment, the ends of the strut are advantageously slid beneath the ears 64 before being held by the clamp 44.

Udover forbedringerne i udformning af kanal og forbindel-5 seselement som beskrevet involverer opfindelsen også kombinationen, som generelt sikrer rulleformningen af en integral ramme ved kanalenden. Rulleformningsoperationen er således, at et holdeorgan automatisk er tilvejebragt for et hjørneforbindelseselement, hvorved hjørneforbindelses-10 elementet hurtigt kan samles med rammen. Den efterfølgende boltning af en kanalende til en anden og tilføjelsen af klemmer og pakninger kan så fuldføres på bekvem måde.In addition to the improvements in channel design and connector element as described, the invention also involves the combination which generally ensures the roll forming of an integral frame at the channel end. The roll forming operation is such that a retaining member is automatically provided for a corner connecting member, whereby the corner connecting member can be quickly assembled with the frame. The subsequent bolting of one duct end to another and the addition of clamps and gaskets can then be conveniently completed.

Den forenklede operation resulterer i en kanalsamling af i høj grad tilfredsstillende styrke, hvorhos kombinatio-15 nen er specielt egnet til brug for kommercielle og industrielle anvendelser.The simplified operation results in a channel assembly of highly satisfactory strength, the combination being particularly suitable for use in commercial and industrial applications.

Claims

A duct, in particular, for air conditioning systems which are assembled by several duct sections with square cross sections, each duct section having a frame and the frames of adjacent duct sections being arranged to be connected to each other by corner fittings with arms meeting each other below a right angle, and connecting means, characterized in that the frames are formed by end sections (18, 20) which are profile-rolled integrally with respective channel walls (10) and comprising a first portion (22) extending -15 is projected at right angles outward from the channel wall, and another portion (24) which is bent back and facing the end of the channel wall (10) indicates that the distance between the second portion (24) and channel wall 20 (10) end corresponds substantially to the width of one of the arms of the corner brackets (34, 50), and - the side edge portions (36, 38; 58, 56) of each arm thus engage with the surface of the second portion 25 (24) and the surface thereof, respectively. said end of canal the wall (10), that the corner angles (34, 50) is held in place in their position relative to the frame.

A plate channel system according to claim 1, characterized in that in the second portion (24) of the end section (18, 20) a groove (30) is formed for receiving the side edge portion (38,56) of one of the arms of a corner bracket (34, 50). 12 DK 173358 B1

A plate channel system according to claim 2, characterized in that said surface (30) of said second portion (24) forms the bottom of a channel for receiving said respective side edge portion (38). 5

A plate channel system according to one of claims 1 to 3, characterized in that the second portion (24) of the end section ions (18, 20) is formed with a bent flange (26) forming a bead (28) intended for engaging a 10 arm on a corner bracket (34, 50) with the other portion.

Plate duct system according to one of claims 1 to 4, characterized in that it includes clamps (44), which can be mounted on two adjacent other portions (24) of two connected end sections (18, 20) of the frames and which extend across the gap between the adjacent other lots (24).

A plate duct system according to one of claims 1 to 5, characterized in that the corner bracket (50) has a projection (52) on the circumference arranged to abut a corresponding projection (50) on an adjacent duct section. 25

A plate channel system according to claim 6, characterized in that the projection (52) is located at the point of connection between the arms, at the circumference of the corner bracket (50). 1 2 3 4 5 6 i

Plate duct system according to one of claims 2 to 7, 2, characterized in that each of the arms of the corner bracket 3 (50) is provided with an outer side edge (56) at an angle extending outwardly (4), with which the arm can be engaged 5 with the gutter ( 30) in the second portion (24) of an end section 6 (18, 20). DK 173358 B1 13

Plate duct system according to claim 8, characterized in that the outer side edge (56) of the corner of a corner bracket (50) protrudes at an angle to the outside (5) for being able to snap into the gutter (30) past a bead (28). ) on the second portion (24) of the end section, by applying a force.

Plate duct system according to one of claims 1 to 9, characterized in that a corner flange (60) adapted to cover a gap in the duct wall at the meeting place (62) 10 for the inner edges of the arms (50) is provided. the transition point between the channel wall and the frame.

Plate channel system according to one of claims 1 to 10, characterized in that means (64) are provided on the end of each corner bracket (50) for holding a stiffening element (66) extending between the ends of opposite corner brackets 20 (50) on an end section (18, 20).

A plate channel system according to claim 11, characterized in that said means are constituted by biased ears (64), whereby the stiffening element (66) can be inserted into the space between the ears (64) and the surface of the frame.