DK164433B

DK164433B - DEVICE FOR BACKGROUND OVEN

Info

Publication number: DK164433B
Application number: DK327584A
Authority: DK
Inventors: Ingvar Petersson; Sven Roos
Original assignee: Bethmann Karl W
Priority date: 1983-07-05
Filing date: 1984-07-04
Publication date: 1992-06-29
Also published as: GB2145318A; GB2145318B; DK327584A; DK164433C; SE449474B; SE8303832D0; DE3424447C2; GB8417020D0; DE3424447A1; DK327584D0; SE8303832L

Description

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Opfindelsen angår en anordning ved en bageriovn med en endeløs transportør til transport af brødemner gennem ovnen fra dens indgangsende til dens udgangsende og med støtter langs transportørens længdekanter til sidestøt-5 ning af brødemnerne, hvorved hver sidestøtte er dannet af flere indbyrdes ledforbundne støtteelementer, som løber i et endeløst kredsløb gennem ovnen sammen med transportøren fra indgangsenden til udgangsenden og derefter uden for ovnen tilbage til indgangsenden.BACKGROUND OF THE INVENTION 1. Field of the Invention The invention relates to a device in a baking oven with an endless conveyor for transporting loaves through the oven from its entrance end to its outlet end and with supports along the longitudinal edges of the conveyor for lateral support of the loaves, each side support being formed by several interconnected supporting members running in an endless circuit through the furnace together with the conveyor from the input end to the output end and then outside the furnace back to the input end.

1010

Ved fremstilling af brød i industriel skala i bagerier ved hjælp af en bageovn af tunneltypen er brødene almindeligvis placeret side om side på en af ståltrådsnet fremstillet transportør i på tværs af transportretningen 15 anordnede rækker, som i det væsentlige er lige så lange, som ovnen er bred, idet brødene, som før ovnen er rasket i et raskeskab, efterhånden bages under transporten gennem ovnen. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Når brødene efter raskning kommer ind i ovnen og udsættes 2 for varmen i denne, vil de yderste brød være tilbøjelige 3 til at flyde ud til siden. For at undgå dette anvender 4 man såkaldte brødtræ på transportøren langs med dennes 5 længdekanter i anlæg mod de yderste brøds ydersider.In the manufacture of industrial-scale breads in bakeries by means of a tunnel-type baking oven, the breads are usually placed side by side on a steel wire mesh conveyor in rows arranged transversely of the conveying direction 15 which are substantially as long as the oven is wide, as the loaves, as before the stove is shelved in a hurry, are gradually baked during transport through the stove. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 When the loaves, after rushing, enter the oven and 2 are exposed to the heat in them, the outer loaves will be inclined 3 to float to the side. To avoid this, 4 so-called bread trees are used on the conveyor along its 5 longitudinal edges in abutment against the outer edges of the bread.

66

Brødtræelementerne er løsbart sammenkoblede med hinanden 7 for at danne en kontinuerlig støtte langs med hver læng 8 dekant, idet træelementerne først anbringes på transpor 9 tøren ved ovnens indgangsende og sammenkobles med de nær 10 mest foranliggende elementer og derefter kobles fra de 11 efterfølgende elementer ved ovnens udgangsende og flyttes 12 manuelt til indgangsenden for sammenkobling osv. Dette er 13 et meget tidsrøvende og kompliceret arbejde, og desuden 14 har træelementerne ikke nogen særlig lang levetid efter 15 som de efterhånden forkuller i ovnen som følge af den hø- 16 je temperatur i denne.The breadwood members are detachably interconnected with each other 7 to form a continuous support along each long 8 decant, the wood members first being placed on the groove 9 dry at the entrance end of the furnace and coupled to the near 10 most facing elements and then disconnected from the 11 subsequent elements at the furnace. output end and manually move 12 to the input end for interconnection, etc. This 13 is a very time consuming and complicated task, and in addition 14 the wood elements do not have a very long life after 15 as they gradually char in the furnace due to the high temperature in this .

22

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For at undgå de med brødtræene forbundne problemer er man i de senere år begyndt at anvende på transportørens længdekanter fast monterede støttelister af elastisk materiale, f.eks. silikonegummi. Sådanne elastiske støttelister 5 har imidlertid den ulempe, at de lige som brødtræelemen-terne har svært ved at holde til varmen i ovnen, hvorfor de lidt efter lidt bliver sprøde og går itu.In order to avoid the problems associated with the bread trees, in recent years, fixed support strips of elastic material have been applied to the conveyor's longitudinal edges, e.g. silicone rubber. However, such elastic support moldings 5 have the disadvantage that, just like the breadboard elements, they have difficulty keeping up with the heat in the oven, which is why they gradually become brittle and break.

Fra svensk patentskrift nr. 88 629 kendes en anordning af 10 den indledningsvis nævnte art. Denne anordning har endeløse bånd, der danner sidestøtter og løber omkring og drives af ruller, d.v.s. tvangsmæssigt uafhængigt af drevet af det endeløse transportbånd, som også indgår i anordningen.From Swedish Patent Specification No. 88 629 a device of the kind mentioned above is known. This device has endless belts forming lateral supports and running around and driven by rollers, i.e. forcibly independent of the drive of the endless conveyor belt, which is also included in the device.

1515

Det er formålet med opfindelsen at anvise en ny type sidestøtter, som ikke er behæftet med de ovenfor beskrevne ulemper og problemer.SUMMARY OF THE INVENTION It is an object of the invention to provide a new type of lateral support which does not suffer from the disadvantages and problems described above.

20 Desuden er det et formål med opfindelsen at udforme disse sidestøtter på en sådan måde, at de yderste brøds yderside isoleres fra den direkte ovnvarme for ikke at blive forbrændt. Sidestøtterne skal således i princippet fungere som falske brød, "dummies" med samme varmeegenskaber 25 som de rigtige for så at sige at narre de yderste brød.In addition, it is an object of the invention to design these side supports in such a way that the outer breads of the outer bread are insulated from the direct oven heat so as not to be burnt. The side supports should thus in principle function as fake breads, "dummies" with the same heat properties 25 as the right ones, so to speak, to fool the outermost loaves.

Disse formål opnås ved, at støtteelementerne er indrettet til at følge transportørens bevægelse under indvirkning af friktionskræfter mellem støtteelementerne og transpor-30 tøren.These objects are achieved in that the support members are arranged to follow the movement of the conveyor under the action of frictional forces between the support members and the conveyor.

Ved således at lade transportøren så at sige drive sidestøtterne, idet disses støtteelementer bringes med af transportøren, opnås flere fordele. Den første og vigtig-35 ste af disse fordele består i, at støtteelementerne altid flyttes med nøjagtig samme hastighed som transportøren gennem ovnen, hvilket netop ved bageriovne er af ydersteBy allowing the conveyor to drive the side supports, so that their supporting elements are brought by the conveyor, several advantages are obtained. The first and most important of these advantages consists in the fact that the support elements are always moved at exactly the same speed as the conveyor through the oven, which is precisely in the baking oven

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3 vigtighed. Skulle støtteelementerne bevæge sig langsommere eller hurtigere gennem ovnen, ville brødemnerne, idet de er placeret side om side på transportøren, samtidigt med, at de yderste brødemner ligger an mod støtteelemen-5 terne, miste deres indbyrdes orientering og komme til at kollidere med hinanden, hvorved de ville blive beskadiget og måtte kasseres.3 importance. Should the support members move slower or faster through the oven, the bread blanks, being placed side by side on the conveyor, while the outer bread blades abut the support members, lose their orientation and collide with each other, whereby they would be damaged and had to be discarded.

Opfindelsen vil blive nærmere forklaret i det følgende 10 under henvisning til tegningen, hvis eneste figur skematisk fra oven viser en bageribageovn af tunnel typen med taget fjernet og udrustet med anordningen ifølge opfindelsen.The invention will be explained in more detail below with reference to the drawing, the only figure of which is a schematic view from above of a roof-type bakery oven with the roof removed and equipped with the device according to the invention.

15 Den på tegningen viste, generelt med 1 betegnede bageriovn er fortrinsvis af tunneltypen til fremstilling af brød i industriel skala. Ovnen 1 har en endeløs transportør 2, som er fremstillet af magnetisk eller magnetiserbart ståltrådsnet og løber over ikke viste omløbsruller 20 ved ovnens 1 indgangsende 3 henholdsvis udgangsende 4. De fra et ikke vist raskeskab kommende, raskede brød 5 er placeret side om side på transportøren 2 i på tværs af transportretningen A anordnede rækker, som i det væsentlige er lige så lange, som ovnen 1 er bred.The baking oven, generally designated 1 in the drawing, is preferably of the tunnel type for making industrial-scale bread. The furnace 1 has an endless conveyor 2 made of magnetic or magnetizable steel wire mesh and running over not shown rollers 20 at the entrance end 3 of the furnace 1 or outlet end 4 respectively. 2 in rows arranged transversely of the conveying direction A which are substantially as long as the furnace 1 is wide.

25 Når de raskede brød 5 kommer ind i ovnen 1, vil som tidligere nævnt de yderste brød være tilbøjelige til at flyde ud til siden, og det er blandt andet dette, som anordningen ifølge opfindelsen har til opgave at forhindre.When the broken bread 5 enters the oven 1, as mentioned earlier, the outer loaves will tend to flow out to the side, and this is among other things the object of the device according to the invention to prevent.

30 Således findes der langs med begge transportørens to længdekanter støtter, som i deres helhed er angivet med henvisningstallet 6 og tjener til sidestøtning af brødene 5 ved anlæg mod de yderste brøds ydersider.30 Thus, along both of the two longitudinal edges of the conveyor, there are supports, which are indicated in their entirety by reference numeral 6 and serve to laterally support the loaves 5 by abutment against the outer edges of the loaves.

Hver sidestøtte 6 er ved den viste, foretrukne udførelsesform dannet af flere ved hjælp af mere eller mindre 35 4Each side support 6 is formed in the illustrated preferred embodiment by several by means of more or less 4

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konventionelle hængselled indbyrdes ledforbundne støtte- · elementer 8, som har form af væsentligt parallellepipedi-ske blikæsker. De i hver sidestøtte 6 indgående støtteelementer 8 løber i et endeløst kredsløb gennem ovnen 1 5 sammen med transportøren 2 i retning A fra indgangsenden 3 til udgangsenden 4, hvorefter de via ikke nærmere viste omløbsrullekonstruktioner 9 og en ikke vist rullebane eller lignende løber tilbage til indgangsenden 3 i retning B uden for ovnen 1.conventional hinge joints interconnected support members 8, which are in the form of substantially parallel piped tin boxes. The supporting elements 8 included in each side support 6 run in an endless circuit through the furnace 1 5 together with the conveyor 2 in the direction A from the input end 3 to the output end 4, after which the circular roller constructions 9 and not shown are shown running back to the input end. 3 in direction B outside the oven 1.

1010

Som tidligere nævnt er transportøren 2 fremstillet af magnetisk eller magnetiserbart materiale, og ved den viste udførelsesform for opfindelsen er støtteelementerne 8 da forsynet med permanentmagneter, så at støtteelemen-15 terne 8 bringes til at følge med i transportørens 2 bevægelse under indvirkning af magnetkræfterne mellem støtteelementernes permanentmagneter og transportøren. Magnetkræfterne er således afpasset, at støtteelementerne 8, når de nærmer sig omløbsrullekonstruktionen 9 ved ud-20 gangsenden 4, taber indgrebet med transportøren 2 for at kunne blive ført omkring omløbsrullekonstruktionen 9. Så snart støtteelementerne 8 via omløbsrullekonstruktionen 9 ved ovnens 1 indgangsende 3 begynder at komme til anlæg mod transportøren 2, tiltrækkes de igen af denne for at 25 blive bragt med gennem ovnen, o.s.v.As previously mentioned, the conveyor 2 is made of magnetic or magnetizable material, and in the illustrated embodiment of the invention, the support elements 8 are then provided with permanent magnets, so that the support elements 8 are caused to monitor the movement of the conveyor 2 under the influence of the magnetic forces between the supporting elements. permanent magnets and the carrier. The magnetic forces are adapted so that as they approach the bypass roller assembly 9 at the exit end 4, the supporting elements 8 lose engagement with the conveyor 2 so as to be guided around the bypass roller assembly 9. As soon as the support elements 8 begin to pass through the bypass roller assembly 9 at the entrance of oven 1 coming into contact with the conveyor 2, they are again attracted by it to be brought through the furnace, etc.

For at danne en jævn støtteflade mod brødene 5, medens disse transporteres gennem ovnen for at blive bagt, har hvert æskelignende støtteelement 8 ved sin, set i trans-30 portretningen A gennem ovnens bageste ende, en overlapningsflange 10, som har til opgave at overlappe en del af det efterfølgende støtteelements 8 støtteflade.In order to form a smooth support surface against the loaves 5 while being transported through the oven to be baked, each box-like support element 8 at its, seen in the transport direction A through the rear end of the oven, has an overlap flange 10 which is intended to overlap a portion of the supporting surface 8 of the subsequent support member 8.

Ifølge en specielt foretrukken udførelse af opfindelsen 35 er de æskeformede støtteelementer 8 fyldt med et materiale, der kan tåle varme, som passende kan være mineraluld, og som før støtteelementernes 8 indtræden i ovnens 1 ind- 5 gangsende vædes med vand eller anden passende væske, som under indvirkning af varmen i ovnen fordamper i denne med henblik på, at køle støtteelementerne, så at de yderste brøds 5 ydersider ikke forbrændes. På denne måde fungerer 5 støtteelementerne 8 i princippet som falske brød, der skal have samme varmeegenskaber som de rigtige brød 5, så at de yderste brød narres til at tro, at der findes yderligere brød uden for dem.According to a particularly preferred embodiment of the invention 35, the box-shaped support members 8 are filled with a material which can withstand heat which may be suitably mineral wool and that before the entry of the support elements 8 into the furnace 1 is wetted with water or other suitable liquid, which, under the influence of the heat in the oven, evaporates in it in order to cool the supporting elements so that the outer surfaces of the outermost bread are not burned. In this way, the support elements 8 in principle function as false breads, which must have the same heat properties as the real breads 5, so that the outermost breads are fooled into believing that there is additional breads outside them.

10 I nogle tilfælde kan det hænde, at de rækker, hvori brødene 5 er anbragt på transportøren 2, varierer i længde, og for trods denne variation at opnå den tilstræbte sideunderstøtning af brødene kan i det mindste de ved ovnens 1 indgangsende 3 placerede omløbsrullekonstruktioner 9 15 og/eller de rammedele eller lignende, der bærer disse, være forskydelige i pilens C retning på tværs af transportørens 2 transportretning A. Efter behov kan også om-løbsrullekonstruktionerne 9 ved ovnens 1 udgangsende 4 være forskydelige på samme eller lignende måde.In some cases, the rows in which the loaves 5 are placed on the conveyor 2 may vary in length, and in spite of this variation obtaining the desired side support of the loaves, at least the by-pass roll constructions 9 at the entrance 3 of the oven 15 and / or the frame parts or the like carrying them may be displaceable in the direction of arrow C across the conveying direction A. of conveyor 2 If necessary, the orifice roll assemblies 9 at the exit 4 of furnace 1 may also be displaceable in the same or similar manner.

2020

Magnetkræfterne til at holde støtteelementerne 8 fast på transportøren 2 kan, hvis transportøren er fremstillet af et umagnetisk materiale, f.eks. et tæppe eller bånd af plast eller lignende, tilvejebringes ved, at man under 25 transportørens øvre part anbringer blikplader eller lignende af magnetisk eller magnetiserbart materiale, som da med transportørens 2 mellemliggende øvre part tiltrækkes af permanentmagneterne i støtteelementerne 8. 1 35The magnetic forces for holding the support members 8 to the conveyor 2 can, if the conveyor is made of an magnetic material, e.g. a blanket or band of plastic or the like is provided by placing, under the upper part of the conveyor, tin plates or the like of magnetic or magnetizable material, which is then attracted by the intermediate upper part of the conveyor 2 by the permanent magnets in the supporting elements 8. 1 35

Claims

Device at a bakery baking oven (1) with an endless conveyor (2) for transporting bread items (5) through the oven from its entrance end (3) to its outlet end (4), and with supports (6) along the conveyor (2) longitudinal edges for side support of the bread blanks (5), each side support (6) being formed by a plurality of interconnected support elements (8) running in an endless circuit through the oven (1) together with the conveyor (2) from the entrance end (3) to the output end (4) and then outside the furnace (1) back to the input end (3), characterized in that the support elements (8) are arranged to follow the movement of the conveyor (2) under the action of frictional forces between the support elements (8) and the conveyor ( 2).

Device according to claim 1, characterized in that the frictional forces are supported by magnetic forces.

Device according to claim 1 or 2, characterized in that the conveyor (2) is made of magnetic or magnetizable material and that the supporting elements (8) 25 are provided with permanent magnets which attract the conveyor (2) or vice versa.

Device according to Claim 1 or 2, characterized in that the conveyor (2) is made of non-magnetic material, that beneath the upper part of the conveyor are plates or the like of magnetic or magnetizable material and that the supporting elements (8) are provided with permanent magnets. , which attracts the plates or vice versa. 35

Device according to any one of the preceding claims, characterized in that the supporting elements 7 l # w itmoo u (8) take the form of substantially parallelepipedic hollow plate boxes.

Device according to any one of the preceding claims, characterized in that the supporting elements (8) also form insulating elements and are filled with a heat-resistant material which, prior to the entry of the supporting elements (8) into the furnace (1) the inlet end (3) can be wetted with water or other suitable liquid which, under the action of the heat in the oven, evaporates in it to cool the supporting elements (8) so that the outer surfaces of the outer loaves (5) are not burned.

Device according to claim 6, characterized in that the heat-resistant material is mineral wool.

Device according to any one of the preceding claims, characterized in that the supporting elements (8) have, as seen in the direction of transport (A), through the rear end of the oven 20 (1) an overlap flange (10) which serves to overlap a portion of the support surface (8) of the subsequent support member (8) to form a smooth support surface against the bread blanks (5) during their transport through the oven (1). 25

Device according to any one of the preceding claims, characterized in that the side supports (6) are arranged at least at the entrance end (3) of the oven (1) transverse to the transport direction (A) of the conveyor (2). to be adapted to the number of side-by-side loaves (5). 35