SE504844C2

SE504844C2 - Device for extraction of exhaust gases

Info

Publication number: SE504844C2
Application number: SE9504436A
Authority: SE
Inventors: Per Anders Andersson
Original assignee: Nederman Philip & Co Ab
Priority date: 1995-12-12
Filing date: 1995-12-12
Publication date: 1997-05-12
Also published as: SE9504436D0; AU1072997A; WO1997021499A1; SE9504436L; DE29623366U1

Abstract

The present invention relates to a device for extraction of exhausts, whereby an exhaust suction carriage (10) which is pulled by a vehicle (2) along an exhaust extraction channel (5), is pulled back or retracted to a starting position (A) by means of a reeling device (23).

Description

504 844 2. ning från utgångsläget, och varvid upprullningsanordningen uppvisar ett upprullningsaggregat, vilket är anordnat att rulla upp det upprullbara organet för att dra tillbaka av- gassugvagnen i riktning mot nämnda utgångsläge efter det att fäst- och frigivningsanordningen frigivit avgasutsug- ningsslangen från fordonet. 504 844 2. from the initial position, and wherein the winding device has a winding assembly, which is arranged to roll up the windable means for retracting the exhaust suction carriage in the direction of said initial position after the fastening and releasing device has released the exhaust extraction hose from the vehicle.

Vid anordningar av ovannämnd typ finns det ingen enkel anordning för att dra tillbaka avgassugvagnen till ut- gångsläget efter dess användning.In the case of devices of the above-mentioned type, there is no simple device for retracting the exhaust suction carriage to the initial position after its use.

Syftet med föreliggande uppfinning har därför varit att åstadkomma en enkel anordning för genomförande av denna funktion. Enligt uppfinningen åstadkomes detta genom att den ovannämnda anordningen i huvudsak uppvisar de känne- tecken som framgår av efterföljande patentkrav 1.The object of the present invention has therefore been to provide a simple device for carrying out this function. According to the invention, this is achieved in that the above-mentioned device essentially has the characteristics which appear from the following claim 1.

Genom att ovannämnda anordning uppvisar dessa känne- tecken uppnàs ett flertal fördelar. Sálunda uppnàs bl.a. en driftsäker återdragningsautomatik till rimliga kost- nader och utan att man behöver vidta omfattande och dyra ombyggnader av eller ingrepp i avgasutsugningskanalen.Because the above-mentioned device has these characteristics, a number of advantages are achieved. Thus, i.a. a reliable automatic retraction at reasonable costs and without the need to carry out extensive and expensive rebuilding of or intervention in the exhaust extraction duct.

Uppfinningen skall nedan förklaras närmare med hänvis- ning till bifogade ritningar, pà vilka figur 1 schematiskt illustrerar en anordning enligt upp- finningen med en sidovy; figur 2 illustrerar anordningen enligt figur 1 med en frontvy enligt linjen II-II; figur 3 illustrerar en del av anordningen enligt figur 1 med en sidovy; figur 4 illustrerar den i figur 3 illustrerade delen med en planvy; 504 844 figur 5 illustrerar anordningen enligt figur 1 med en sidovy, varvid nämnda anordning uppvisar en schematiskt visad regleranordning; och figur 6 schematiskt illustrerar en fäst- och frigivnings- anordning för att fästa en i anordningen enligt figur 1 ingående avgasutsugningsslang vid ett fordonsavgasrör.The invention will be explained in more detail below with reference to the accompanying drawings, in which Figure 1 schematically illustrates a device according to the invention with a side view; figure 2 illustrates the device according to figure 1 with a front view along the line II-II; Figure 3 illustrates a part of the device according to Figure 1 with a side view; Figure 4 illustrates the part illustrated in Figure 3 with a plan view; 504 844 figure 5 illustrates the device according to figure 1 with a side view, said device having a schematically shown control device; and Figure 6 schematically illustrates a fastening and releasing device for attaching an exhaust extraction hose included in the device according to Figure 1 to a vehicle exhaust pipe.

På ritningarna illustreras en anordning 1 för utsugning av avgaser från ett fordon 2 som köres längs en bana 3 i en lokal 4, t.ex. ett garage, en bilverkstad, en brand- station eller en bilbesiktningslokal. Ovanför banan 3 är anordnad en làngsträckt avgasutsugningskanal 5 som via hållare 6 är fäst vid lokalens 4 tak 7. Avgasutsug- ningskanalen 5 uppvisar nedtill två tätningslister 8 och 9 som anligger mot varandra och som är avsedda att tillsluta avgasutsugningskanalen 5 nedtill.The drawings illustrate a device 1 for extracting exhaust gases from a vehicle 2 which is driven along a track 3 in a room 4, e.g. a garage, a car repair shop, a fire station or a car inspection room. Above the web 3 is arranged an elongate exhaust exhaust duct 5 which is attached via holder 6 to the roof 7 of the room 4. The exhaust exhaust duct 5 has at the bottom two sealing strips 8 and 9 which abut against each other and which are intended to close the exhaust exhaust duct 5 at the bottom.

En avgassugvagn 10 är förflyttbar längs avgasutsugnings- kanalen 5 genom att uppvisa rullar ll och 12 som löper på skenor 13 och 14. Dessa bildas av avgasutsugnings- kanalen 5 och är anordnade inuti denna. Avgassugvagnen 10 uppvisar en rördel 15 som är riktad nedåt och som nedanför tätningslisterna 8, 9 uppvisar en böjlig avgas- utsugningsslang 16. Denna kan placeras i ett avgasutsug- ningsläge i förhållande till fordonets 2 avgasrör 17 och hållas fast i detta läge med hjälp av en schematiskt visad fäst- och frigivningsanordning 18, som kan samverka med avgasutsugningsslangen 16. Avgassugvagnen 10 är anordnad att sära tätningslisterna 8, 9 såväl när densamma står stilla som när den förflyttas utmed avgasutsugningskana- len 5 så att avgaser kan strömma från avgasutsugnings- slangen 16 via avgassugvagnen 10 in i avgasutsugnings- kanalen 5. På motsatta sidor om avgassugvagnen 10 till- slutes avgasutsugningskanalen 5 av tätningslisterna 8, 9. 504 844 4.An exhaust suction trolley 10 is movable along the exhaust extraction duct 5 by having rollers 11 and 12 running on rails 13 and 14. These are formed by the exhaust extraction duct 5 and are arranged inside it. The exhaust suction trolley 10 has a pipe part 15 which is directed downwards and which below the sealing strips 8, 9 has a flexible exhaust extraction hose 16. This can be placed in an exhaust extraction position in relation to the exhaust pipe 17 of the vehicle 2 and held in this position by means of a schematically shown fastening and releasing device 18, which can cooperate with the exhaust extraction hose 16. The exhaust suction trolley 10 is arranged to separate the sealing strips 8, 9 both when it is stationary and when it is moved along the exhaust extraction duct 5 so that exhaust gases can flow via the exhaust extraction hose 16 the exhaust suction carriage 10 into the exhaust extraction duct 5. On opposite sides of the exhaust suction carriage 10, the exhaust extraction duct 5 is closed by the sealing strips 8, 9. 504 844 4.

Dá fordonet 2 köres längs banan 3 kommer detta via avgas- utsugningsslangen 16 att dra med sig avgassugvagnen 10 frán ett utgångsläge A vid ett ändparti 21 av avgas- utsugningskanalen 5 i riktning B och utmed en rörelse- bana C som sträcker sig längs avgasutsugningskanalen 5 till ett motsatt ändparti 22 av denna. När avgassugvagnen 10 av fordonet 2 dragits till ändpartiet 22 kommer fäst- och frigivningsanordningen 18 att påverkas automatiskt av en avkopplingsanordning (ej visad) sá att den släpper sitt grepp om avgasröret 17, varigenom avgassugvagnen 10 kan stoppas vid nämnda ändparti 22 medan fordonet 2 köres vidare ut ur lokalen 4.When the vehicle 2 is driven along the path 3, this will via the exhaust extraction hose 16 pull the exhaust suction carriage 10 from an initial position A at an end portion 21 of the exhaust extraction duct 5 in direction B and along a path of movement C extending along the exhaust extraction duct 5 to an opposite end portion 22 thereof. When the exhaust suction trolley 10 of the vehicle 2 is pulled to the end portion 22, the fastening and releasing device 18 will be actuated automatically by a relaxation device (not shown) so that it releases its grip on the exhaust pipe 17, whereby the exhaust suction trolley 10 can be stopped at said end portion 22. out of the room 4.

Avgasutsugningskanalen 5 är ansluten till ett rörsystem 19 i vilket det kan ràda undertryck sá att undertryck även alstras i avgasutsugningskanalen 5, avgassugvagnen 10 och avgasutsugningsslangen 16. Härigenom kan avgaserna fràn avgasröret 17 effektivt suges in i avgasutsugnings- slangen 16 och via avgassugvagnen 10 in i avgasutsugnings- kanalen 5 och slutligen via nämnda rörsystem 19 ut ur lokalen 4.The exhaust extraction duct 5 is connected to a pipe system 19 in which it can handle negative pressure so that negative pressure is also generated in the exhaust extraction duct 5, the exhaust suction carriage 10 and the exhaust extraction hose 16. Hereby the exhaust gases from the exhaust pipe 17 can be efficiently sucked into the exhaust extraction hose the channel 5 and finally via said pipe system 19 out of the room 4.

För att dra tillbaka avgassugvagnen 10 i riktning D mot utgångsläget A är vid avgasutsugningskanalens 5 ena änd- parti 21 anordnad en upprullningsanordning 23 med ett upprullbart organ 24, t.ex. en tunn nylonlina med en dia- meter pá ca. 3 mm. Detta upprullbara organ 24 sträcker sig fràn upprullningsanordningen 23 till avgassugvagnen 10 och är fäst vid denna.In order to retract the exhaust suction carriage 10 in direction D towards the initial position A, a winding device 23 is arranged at one end portion 21 of the exhaust extraction duct 5 with a retractable member 24, e.g. a thin nylon line with a diameter of approx. 3 mm. This retractable member 24 extends from the retractor 23 to the exhaust suction carriage 10 and is attached thereto.

Upprullningsanordningen 23 uppvisar en stativdel 25 pá vilken är anordnat ett upprullningsaggregat 26. Detta uppvisar åtminstone en upprullningsfjäder 27 och en med denna samverkande upprullningstrumma 28 som är roterbart lagrad. Det upprullbara organet 24 är upprullat pà upp- rullningstrumman 28 så att denna roteras i riktning E när det upprullbara organet 24 rullas av densamma då fordo- 504 844 net 2 drar avgassugvagnen 10 i riktning B från utgångs- läget A. Härvid samverkar upprullningstrumman 28 så med upprullningsfjädern 27 att denna spännes och detta fortgår sålänge fordonet 2 drar avgassugvagnen 10 längs rörelse- banan C och tills denna när avgasutsugningskanalens 5 änd- parti 22.The winding device 23 has a frame part 25 on which a winding assembly 26 is arranged. This has at least one winding spring 27 and a winding drum 28 cooperating therewith which is rotatably mounted. The roll-up member 24 is wound on the take-up drum 28 so that it is rotated in the direction E when the roll-up member 24 is rolled by the same as the vehicle 2 pulls the exhaust suction carriage 10 in the direction B from the initial position A. Hereby the take-up drum 28 cooperates so with the winding spring 27 that it is tensioned and this continues as long as the vehicle 2 pulls the exhaust suction carriage 10 along the path of movement C and until it reaches the end portion 22 of the exhaust extraction duct 5.

Därefter kommer den spända upprullningsfjädern 27 automa- tiskt att rotera upprullningstruman 28 i motsatt rota- tionsriktning F och därmed att rulla upp det upprull- bara organet 24, varigenom avgassugvagnen 10 automatiskt dras tillbaka i riktning D mot utgångsläget A tills den- samma åter intagit detta. Upprullningsanordningen 23 kan uppvisa en spärranordning (ej visad), som måste utlösas innan densamma kan dra tillbaka avgassugvagnen 10 till utgångsläget A.Thereafter, the tensioned winding spring 27 will automatically rotate the winding drum 28 in the opposite direction of rotation F and thereby roll up the winding member 24, whereby the exhaust suction carriage 10 is automatically retracted in direction D towards the initial position A until it has again taken it . The winding device 23 may have a locking device (not shown), which must be released before it can retract the exhaust suction carriage 10 to the initial position A.

Upprullningsfjädern 27 kan vara anordnad att via avgas- sugvagnen 10 och avgasutsugningsslangen 16 utöva sådan maximal fjäderkraft på fäst- och frigivningsanordningen 18 att denna inte oavsiktligt lossnar från fordonets 2 avgasrör 17 då upprullningsfjädern 27 spännes. Vidare kan upprullningsfjädern 27 vara anordnad att utöva sàdan fjäderkraft på avgassugvagnen 10 att densamma förmår dra tillbaka avgassugvagnen 10 till utgångsläget A under övervinnande av det friktionsmotstånd som tät- ningslisterna 8, 9 utövar på avgassugvagnen 10 genom att anligga mot denna vid dess rörelse i riktning D mot utgångsläget A. Dessutom kan upprullningsfjädern 27 vara anordnad att utöva sådan fjäderkraft på avgas- sugvagnen 10 i förhållande till det friktionsmotstånd som uppkommer mellan avgassugvagnen 10 och tätnings- listerna 8, 9 då avgassugvagnen 10 förflyttas i rikt- ning D mot utgångsläget A, att avgassugvagnen 10 når en stoppanordning 29 vid utgångsläget A på avgasutsug- ningskanalen 5 med sådan hastighet att varken stopp- anordningen 29 eller avgassugvagnen 10 utsättes för skad- 504 844 liga stötbelastningar. Sistnämnda fjäderkraft kan vara så vald i förhållande till nämnda friktionsmotstånd att avgassugvagnen 10 förflyttas mot utgångsläget A med i huvudsak konstant hastighet.The winding spring 27 can be arranged to exert such a maximum spring force on the fastening and releasing device 18 via the exhaust suction carriage 10 and the exhaust extraction hose 16 that it does not inadvertently detach from the exhaust pipe 17 of the vehicle 2 when the winding spring 27 is tensioned. Furthermore, the coil spring 27 may be arranged to exert such a spring force on the exhaust suction carriage 10 that it is able to retract the exhaust suction carriage 10 to the initial position A while overcoming the frictional resistance which the sealing strips 8, 9 exert on the exhaust suction carriage 10 by abutting it in its direction. against the initial position A. In addition, the winding spring 27 can be arranged to exert such spring force on the exhaust suction carriage 10 in relation to the frictional resistance which arises between the exhaust suction carriage 10 and the sealing strips 8, 9 when the exhaust suction carriage 10 is moved in direction D towards the initial position A, the exhaust suction carriage 10 reaches a stopping device 29 at the initial position A on the exhaust extraction duct 5 at such a speed that neither the stopping device 29 nor the exhaust suction carriage 10 is subjected to harmful shock loads. The latter spring force can be so selected in relation to said frictional resistance that the exhaust suction carriage 10 is moved towards the initial position A at a substantially constant speed.

Upprullningsanordningen 23 kan vara anbringad på avgas- utsugningskanalen 5 invid ändpartiet 21 så att det upp- rullbara organet 24 kan sträcka sig från upprullnings- trumman 28 till avgasutsugningskanalen 5 i en med avgas- utsugningskanalen 5 i huvudsak parallell riktning.The winding device 23 can be arranged on the exhaust exhaust duct 5 next to the end portion 21 so that the roll-up member 24 can extend from the winding drum 28 to the exhaust exhaust duct 5 in a direction substantially parallel to the exhaust exhaust duct 5.

Upprullningsanordningens 23 stativdel 25 kan via åtmins- tone en separat fästarm 30 vara monterbart anbringbar pá avgasutsugningskanalen 5. Denna fästarm 30 kan vara fast- skruvbar med hjälp av bultar 31 vid ändpartiet 21 så att densamma är riktad ut från ändpartiet 21 parallellt eller i huvudsak parallellt med avgasutsugningskanalen 5. Sta- tivdelen 25 är i sin tur med hjälp av bultar 32 fast- skruvad på fästarmen 30 på sådant sätt att upprullnings- anordningen 23 befinner sig ett stycke ifrån avgasut- sugningskanalens 5 ändparti 21.The frame part 25 of the winding device 23 can via at least one separate fastening arm 30 be mountably mountable on the exhaust extraction duct 5. This fastening arm 30 can be screwed on by means of bolts 31 at the end portion 21 so that it is directed away from the end portion 21 parallel or substantially parallel with the exhaust extraction duct 5. The frame part 25 is in turn screwed onto the fastening arm 30 by means of bolts 32 in such a way that the winding device 23 is located some distance from the end portion 21 of the exhaust extraction duct 5.

Avgasutsugningskanalens 5 ändparti 21 har en ändöppning som är tillsluten med hjälp av en ändvägg 33. Denna änd- vägg 33 har ett hål 34 genom vilket det upprullbara or- ganet 24 sträcker sig in i avgasutsugningskanalen 5.The end portion 21 of the exhaust extraction duct 5 has an end opening which is closed by means of an end wall 33. This end wall 33 has a hole 34 through which the retractable member 24 extends into the exhaust extraction duct 5.

Det upprullbara organet 24 sträcker sig därefter inuti avgasutsugningskanalen 5 till avgassugvagnen 10 och är fäst vid sådana inre delar 35 av avgassugvagnen 10 som befinner sig inuti avgasutsugningskanalen 5. Om ändväggen 33 består av slitbart material, t.ex. gummimaterial, kan densamma uppvisa en förstärkning 36 runt hålet 34. Det upprullbara organet 24 är företrädesvis så anordnat inuti avgasutsugningskanalen 5 att detsamma inte kommer in mel- lan tätningslisterna 8, 9. 504 844 Som upprullningsanordning 23 kan användas en upprullnings- anordning som egentligen är framställd för annan använd- ning och som vid behov ändras eller kompletteras.The roll-up member 24 then extends inside the exhaust extraction duct 5 to the exhaust suction carriage 10 and is attached to such inner parts 35 of the exhaust suction carriage 10 which are located inside the exhaust extraction duct 5. If the end wall 33 consists of wearable material, e.g. rubber material, the same can have a reinforcement 36 around the hole 34. The roll-up member 24 is preferably arranged inside the exhaust extraction duct 5 so that it does not enter between the sealing strips 8, 9. 504 844 As a winding device 23 a winding device can be used which is actually manufactured for other uses and which are modified or supplemented if necessary.

Denna upprullningsanordning 23 är företrädesvis monterbar vid avgasutsugningskanalen 5 pà lämpligt sätt och det där- pà anordnade upprullbara organet 24 är anslutbart till av- gassugvagnen 10 pà lämpligt sätt och vid lämpligt ställe.This winding device 23 is preferably mountable at the exhaust extraction duct 5 in a suitable manner and the winding member 24 arranged thereon can be connected to the exhaust suction carriage 10 in a suitable manner and at a suitable place.

Avgasutsugningskanalen 5 bestàr företrädesvis av en typ där samma delar därav medger förflyttning av avgassugvag- nen 10 i säväl riktning B fràn utgångsläget A som i rikt- ning D mot detta, varigenom man slipper använda sig av en särskild átergàngsbana bredvid avgasutsugningskanalen 5.The exhaust extraction duct 5 preferably consists of a type where the same parts thereof allow movement of the exhaust suction carriage 10 in both direction B from the initial position A and in direction D thereof, thereby avoiding the use of a special return path next to the exhaust extraction duct 5.

Längden pà avgasutsugningskanalen 5 kan överstiga 20 m och den är företrädesvis 25-35 m. Längden pà den del av det upprullbara organet 24 som är avrullbar fràn avrull- ningsanordningen 23 är anpassad till nämnda längd pà avgasutsugningskanalen 5 och den kan överstiga 20 m och är företrädesvis 25-35 m.The length of the exhaust exhaust duct 5 may exceed 20 m and it is preferably 25-35 m. The length of the part of the retractable member 24 which is unrollable from the unwinding device 23 is adapted to said length of the exhaust exhaust duct 5 and it may exceed 20 m and is preferably 25-35 m.

Undertrycket i rörsystemet 19, avgasutsugningskanalen 5, avgassugvagnen 10 och avgasutsugningsslangen 16 medges med hjälp av en i rörsystemet 19 anordnad undertryck- medgivande anordning 37, t.ex. en fläktanordning eller ett avstängningsspjäll som stänger av rörsystemet 19 mel- lan en fläktanordning och avgasutsugningskanalen 5. Här- vid kan avgassugvagnen 10 samverka med en regleranord- ning 38 som styr den undertryckmedgivande anordningen 37 att medge att det föreligger undertryck i avgasutsug- ningskanalen 5 dä avgassugvagnen 10 förflyttas i rikt- ning B fràn utgångsläget A, men att vid avgassugvagnens 10 rörelse i riktning D mot utgångsläget A medge att det inte föreligger undertryck i avgasutsugningskanalen 5.The negative pressure in the pipe system 19, the exhaust extraction duct 5, the exhaust suction trolley 10 and the exhaust exhaust hose 16 are permitted by means of a negative pressure-allowing device 37 arranged in the pipe system 19, e.g. a fan device or a shut-off damper which shuts off the pipe system 19 between a fan device and the exhaust extraction duct 5. In this case, the exhaust suction carriage 10 can co-operate with a control device 38 which controls the negative pressure granting device 37 to allow negative pressure in the exhaust extraction duct 5 then the exhaust suction trolley 10 is moved in direction B from the initial position A, but when the exhaust suction trolley 10 moves in direction D towards the initial position A to admit that there is no negative pressure in the exhaust extraction duct 5.

Härigenom säkerställes att friktionsmotstàndet mellan tätningslisterna 8, 9 och avgassugvagnen 10 är mindre 504 844 då denna förflyttas i riktning D mot utgångsläget A än då den förflyttas i riktning B från utgångsläget A, efter- som tätningslisterna 8, 9 anligger mot varandra med större tryck när det föreligger undertryck i avgasutsugnings- kanalen 5 än då det inte föreligger undertryck i denna.This ensures that the frictional resistance between the sealing strips 8, 9 and the exhaust suction carriage 10 is less 504 844 when it is moved in direction D towards the initial position A than when it is moved in direction B from the initial position A, since the sealing strips 8, 9 abut each other with greater pressure. there is a negative pressure in the exhaust extraction duct 5 than when there is no negative pressure in it.

Dessutom kan energi sparas eller säkerställas att varmluft inte onödigtvis sugs ur lokalen 4 om den undertryckmedgi- vande anordningen 37 är en fläktanordning som stängs av och/eller ett spjäll som stänges av rörsystemet 19.In addition, energy can be saved or ensured that hot air is not unnecessarily sucked out of the room 4 if the negative pressure device 37 is a fan device which is switched off and / or a damper which is closed by the pipe system 19.

Regleranordningen 38 kan uppvisa två kontaktorgan 39, 40 som är kopplade till ett styrdon 41 som är avsett att styra den undertryckmedgivande anordningen 37. Då avgas- sugvagnen 10 förflyttas i riktning B från utgångsläget A samverkar densamma med kontaktorganet 39 som ger signal till styrdonet 41 att styra den undertryckmedgivande anordningen 37 att medge alstring av undertryck i av- gasutsugningskanalen 5. När avgassugvagnen 10 förflyt- tats sà långt i nämnda riktning att densama kan samverka med det andra kontaktorganet 40 kommer detta att ge sig- nal till styrdonet 41 att styra den undertryckmedgivande anordningen 37 att avbryta undertryckalstringen i avgas- utsugningskanalen 5. När avgassugvagnen 10 istället för- flyttas i riktning D mot utgångsläget A och samverkar med nämnda kontaktorgan 39, 40 sändes inga signaler till styrdonet 41 utan den avbrutna undertryckalstringen i avgasutsugningskanalen 5 förblir avbruten under hela nämnda förflyttning.The control device 38 may have two contact means 39, 40 which are connected to a control device 41 which is intended to control the negative pressure granting device 37. When the exhaust suction carriage 10 is moved in direction B from the initial position A, it cooperates with the contact means 39 which signals the control device 41 to directing the negative pressure releasing device 37 to allow the generation of negative pressure in the exhaust extraction duct 5. When the exhaust suction carriage 10 is moved so far in said direction that it can cooperate with the second contact means 40, this will give a signal to the control device 41 to control the negative pressure releasing device 37 to interrupt the negative pressure generation in the exhaust extraction duct 5. When the exhaust suction carriage 10 is instead moved in direction D towards the initial position A and cooperates with said contact means 39, 40 no signals are sent to the control device 41 but the interrupted negative pressure generation in the exhaust extraction duct 5 remains displacement.

Den ovan beskrivna och på ritningarna visade anordningen kan variera inom ramen för efterföljande patentkrav vad gäller olika varianter av de olika delarna och dess funk- tioner. Det kan nämnas att upprullningsanordningens 23 upprullningsaggregat 26 istället för en upprullnings- fjäder kan uppvisa en elmotor som är frikopplingsbar då det upprullbara organet 24 rullas av vid avgassugvagnens 10 förflyttning i riktning B från utgångsläget A. Elmotorn 504 844 kan styras att starta upprullningen av det upprullbara or- ganet 24 och därmed tillbakadragningen av avgassugvagnen 10 i riktning D mot utgångsläget A genom fjärrstyrning med hjälp av signaler, t.ex. infraröda ljussignaler, som av- ges av en bärbar sändare. Det kan slutligen nämnas att det upprullbara organet 24 kan vara ett annat organ än en lina, att det upprullbara organet 2¿ kan vara anordnat helt utanför avgasutsugningskanalen 5, att upprullnings- anordningen 23 kan vara av annan typ än den visade, att densamma kan vara anordnad pà annat sätt än det visade och att fäst- och frigivningsanordningen 18 kan vara av annan typ än den visade och vara anbringbar pá andra delar av fordonet 2 än pà avgasröret 17.The device described above and shown in the drawings may vary within the scope of the appended claims as regards different variants of the various parts and their functions. It may be mentioned that the winding assembly 26 of the winding device 23 instead of a winding spring may have an electric motor which can be disengaged when the winding means 24 is unwound when the exhaust suction carriage 10 is moved in direction B from the starting position A. The electric motor 504 844 can be controlled to start the winding of the winding the means 24 and thus the retraction of the exhaust suction carriage 10 in direction D towards the initial position A by remote control by means of signals, e.g. infrared light signals emitted by a portable transmitter. Finally, it can be mentioned that the winding means 24 can be a means other than a line, that the winding means 2¿ can be arranged completely outside the exhaust extraction duct 5, that the winding device 23 can be of a different type than the one shown, that it can be arranged in a manner other than that shown and that the fastening and releasing device 18 may be of a different type than the one shown and be applicable to other parts of the vehicle 2 than to the exhaust pipe 17.

Claims

so4 844/0 Patent claim: lIIIIIIflIIIl / llllll

Device for extracting vehicle exhaust gases, wherein an exhaust extraction duct (5) is arranged in a room (4) above a track (3) along which a vehicle (2) is intended to be driven, the exhaust extraction duct (5) having sealing strips (8, 9) which are intended to close it at the bottom, an exhaust suction carriage (10) being movable along the exhaust extraction duct (5) and having a hanging exhaust extraction hose (16), the exhaust suction trolley (10) being arranged to separate the sealing strips (8). , 9) so that exhaust gases can flow from the exhaust exhaust hose (16) and into the exhaust exhaust duct (5), '504 844 wherein the exhaust exhaust hose (16) by means of a fastening and releasing device (18) is attachable to the vehicle (2) so that the exhaust extraction hose (16) is in an exhaust extraction position relative to an exhaust pipe (17) on the vehicle (2) and so that when driving along said path (3) pulls the exhaust suction trolley (10) along the exhaust extraction duct (5) in the direction ( B) from a starting position (A), v a winding device (23) having a winding member (24) extending from the winding device (23) to the exhaust suction carriage (10) and arranged thereon so that it is unwound from the winding device (23) when the vehicle ( 2) pulls the exhaust suction carriage (10) along the exhaust extraction duct (5) in direction (B) from the initial position (A), and wherein the winding device (23) has a winding assembly (26), which is arranged to wind up the winding means (24) to retract the exhaust suction carriage (10) in the direction (D) towards said initial position (A) after the fastening and releasing device (18) has released the exhaust extraction hose (16) from the vehicle (2), characterized in that the winding device (23) winding assembly (26) has at least one winding spring (27) which is tensioned when a winding drum (28) included in the winding assembly (26) rotates in a direction of rotation (E) when the winding member (24) is unwound therefrom. O that the winding spring (27), when tensioned and the fastening and releasing device (18) released the exhaust suction hose (16) from the vehicle (2), causes said winding drum (28) to rotate in the opposite direction of rotation (F), whereby it the retractable means (24) is wound up on the take-up drum (28) and thereby pulls the exhaust suction carriage (10) in the direction (D) towards the initial position (A). 504 844 'i

Device according to Claim 1, characterized in that the winding spring (27) is arranged to exert such a maximum spring force on the fastening and releasing device (18) via the exhaust suction carriage (10) and the exhaust extraction hose (16) that it does not inadvertently detach from the vehicle. (2).

Device according to claim 1 or 2, characterized in that the winding spring (27) is arranged to exert such a spring force on the exhaust suction carriage (10) that it is able to retract the exhaust suction carriage (10) to the initial position (A) while overcoming the frictional resistance which the sealing strips (8, 9) exert on the exhaust suction carriage (10) by abutting against it during its movement in the direction (D) towards the initial position (A).

Device according to one of Claims 1 to 3, characterized in that the winding spring (27) is arranged to exert such a spring force on the exhaust suction carriage (10) in relation to the frictional resistance which arises between the exhaust suction carriage (10) and the sealing strips (8). , 9) when the exhaust suction trolley (10) is moved in the direction (D) towards the initial position (A), that the exhaust suction trolley (10) reaches a stopping device (29) at the initial position (A) at such a speed that neither the stopping device (29) nor the exhaust suction trolley (10) are exposed to harmful shock loads.

Device according to one of Claims 1 to 4, characterized in that the winding spring (27) is arranged to exert such a spring force on the exhaust suction carriage (10) in relation to the frictional resistance which arises between the exhaust suction carriage (10) and the sealing strips (8). , 9) when the exhaust suction trolley (10) is moved in the direction (D) towards the initial position (A), that the exhaust suction trolley (10) is moved at a substantially constant speed in the direction (D) towards the initial position (A). (3,504,844

Device according to any one of the preceding claims, characterized in that the winding device (23) is arranged at an end portion (21) of the exhaust exhaust duct (5) and that the winding device (23) is in such a position next to said end portion ( 21) that the roll-up member (24) can extend from the winding device (23) to the exhaust suction carriage (10) in a direction substantially parallel to the exhaust extraction duct (5).

Device according to any one of the preceding claims, characterized in that the retractable member (24) extends from the retracting device (23) into the exhaust extraction duct (5) via a hall (34) in an end wall (33) which closes the exhaust extraction duct ( 5), that the retractable member (24) extends inside the exhaust exhaust duct (5) from said end wall (33) to the exhaust suction carriage (10) and that the retractable member (24) is mounted on such inner parts (35) of the exhaust suction trolley (5). 10) which are arranged inside the exhaust exhaust duct (5).

Device according to claim 7, characterized in that the roll-up member (24) is arranged inside the exhaust extraction duct (5) in such a way that the same does not hang down between the sealing strips (8, 9).

Device according to one of the preceding claims, wherein a negative pressure for generating the exhaust gases is generated in the exhaust extraction duct (5), characterized in that the exhaust suction carriage (10) cooperates with a control device (38) which controls a negative pressure-assisting device (37) the movement of the exhaust suction carriage (10) in direction (B) from the initial position (A) admits that there is negative pressure in the exhaust extraction duct (5) but that during the movement of the exhaust suction trolley (10) in the direction (D) towards the initial position (A) there is no negative pressure in the exhaust extraction duct (5), whereby the frictional resistance between the sealing strips (8, 9) and the exhaust suction carriage (10) is less when it is moved in direction (D) towards the initial position (A) than when it is moved in direction ( B) from the initial position (A), since the sealing strips (8, 9) abut each other with greater pressure when there is a negative pressure in the exhaust extraction duct (5) than when there is no negative pressure in it.

Device according to claim 9, characterized in that the control device (38) has two contact means (39, 40), wherein the exhaust suction carriage (10) cooperates with one contact means (39) when it is moved in direction (B) from the initial position (A) and wherein said contact means (39) controls the negative pressure allowing device (37) to allow negative pressure generation in the exhaust extraction duct (5) during the movement of the exhaust suction carriage (10) to the second contact means (40), that the exhaust suction carriage (10) said movement cooperates with the second contact means (40), said second contact means (40) controlling the negative pressure granting device (37) to interrupt the negative pressure generation in the exhaust exhaust duct (5), and to bathe the contact means (39, 40) allowing the the interrupted negative pressure generation in the exhaust extraction duct (5) remains interrupted when the exhaust suction carriage (10) cooperates with these contact means (39, 40) during its movement in direction (D) towards the initial position (A).

11. ll. Device according to claim 10, characterized in that the contact means (39, 40) of the control device (38) cooperate with a negative pressure-assisting device (37) in the form of a fan device and / or such a damper device which can interrupt the connection between a fan device and the exhaust duct (5). 504 844 / b

Device according to one of the preceding claims, characterized in that the winding device (23) is arranged at an exhaust extraction duct (5), the same parts of which allow movement of the exhaust suction trolley (10) in both direction (B) from the initial position (A) and in direction (D) towards the initial position (A), whereby a separate return path next to the exhaust exhaust duct (5) can be dispensed with.

Device according to one of the preceding claims, characterized in that the length of the exhaust exhaust duct (5) exceeds 20 m and is preferably 25-35 m, that the length of the part of the retractable member (24) which can be unrolled from the retracting device (23), is adapted to said length of the exhaust exhaust duct (5), ie exceeds 20 m and and is preferably 25- -35 m, and that the retractable member (24) is preferably a nylon line with a diameter of about 3 mm.

Device according to any one of the preceding claims, characterized in that the exhaust extraction duct (5) is complementary to a rewinding device (23) which can also be used for other purposes in that said rewinding device (23) is mountable on the exhaust extraction duct (5). and in that a means (24) which can be wound up thereon is connectable to the exhaust suction carriage (10).

Device according to one of the preceding claims, characterized in that a winding device (23), which is manufactured for another use, can preferably be fitted to the exhaust extraction duct (5) by means of at least one fastening arm (30) which is fitted on an end portion. (21) of the exhaust exhaust duct (5) and which is directed away from said end portion (21) parallel or substantially parallel to the exhaust exhaust duct (5), the winding device (23) being arranged on the fastening arm (30) so that it is a distance from said end portion (21). 504 844

A device for extracting vehicle exhaust gases, wherein an exhaust extraction duct (5) is arranged in a room (4) above a path (3) along which a vehicle (2) is intended to be driven, the exhaust extraction duct (5) having sealing strips (8, 9) which are intended to close it at the bottom, an exhaust suction carriage (10) being movable along the exhaust extraction duct (5) and having a hanging exhaust extraction hose (16), the exhaust suction trolley (10) being arranged to separate the sealing strips (8). , 9) so that exhaust gases can flow from the exhaust exhaust hose (16) and into the exhaust exhaust duct (5), the exhaust exhaust hose (16) being fitted to the vehicle (2) by means of a fastening and releasing device (18) so that the exhaust exhaust hose (2) 16) is in an exhaust position in relation to an exhaust pipe (17) on the vehicle (2) and so that when driving along said path (3) it pulls the exhaust carriage (10) along the exhaust exhaust duct (5) in direction (B) from an initial position (A), wherein a winding device (23) has a winding member (24) which extends from the winding device (23) to the exhaust suction carriage (10) and is arranged thereon so that it is unwound from the winding device (23) when the vehicle (2) pulls the exhaust suction carriage (10) along the exhaust extraction duct (5) in direction (B) from the initial position (A), and the winding device (23) has a winding assembly (26), which is arranged to roll up the windable means (24) to retract the exhaust suction carriage (10) in direction (D) towards said starting position (A) 504 844 I? after the attachment and release device (18) has released the exhaust suction hose (16) from the vehicle (2), characterized in that the retractable member (24) extends from the retractor (23) into the exhaust exhaust duct (5) via a heel (34) in an end wall (33) closing the exhaust extraction duct (5), that the retractable member (24) extends inside the exhaust exhaust duct (5) from said end wall (33) to the exhaust suction carriage (10), and that it the retractable means (24) is mounted on such inner parts (35) of the exhaust suction carriage (10) which are arranged inside the exhaust extraction duct (5).

Device according to claim 16, characterized in that the roll-up member (24) is arranged inside the exhaust extraction duct (5) in such a way that the same does not hang down between the sealing strips (8, 9).

A device for extracting vehicle exhaust gases, wherein an exhaust exhaust duct (5) is arranged in a room (4) above a path (3) along which a vehicle (2) is intended to be driven, the exhaust exhaust duct (5) having sealing strips (8, 9) which are intended to close them at the bottom, an exhaust suction trolley (10) being movable along the exhaust extraction duct (5) and having a hanging exhaust extraction hose (16), 504 844, g, the exhaust suction trolley (10) being arranged to separate the seal. - the strips (8, 9) so that exhaust gases can flow from the exhaust exhaust hose (16) and into the exhaust exhaust duct (5), the exhaust exhaust hose (16) being fitted to the vehicle (2) by means of a fastening and releasing device (18) so that the exhaust extraction hose (16) is in an exhaust extraction position relative to an exhaust pipe (17) on the vehicle (2) and so that when driving along said path (3) the exhaust suction trolley (10) pulls along the exhaust extraction duct (5) in the direction (B) from a starting position (A), a winding device (23) having a winding member (24) extending from the winding device (23) to the exhaust suction carriage (10) and arranged thereon so that it is unwound from the winding device (23) when the vehicle (23) 2) pulls the exhaust suction trolley (10) along the exhaust extraction duct (5) in direction (B) from the initial position (A), the winding device (23) having a winding assembly (26), which is arranged to roll up the windable means (24) for retracting the exhaust suction carriage (10) in the direction (D) towards said initial position (A) after the fastening and releasing device (18) has released the exhaust extraction hose (16) from the vehicle (2), and wherein in the exhaust extraction duct (5) a negative pressure is generated for extracting the exhaust gases, characterized in that the exhaust suction carriage (10) cooperates with a control device (38) which controls a negative pressure-assisting device (37) that during the movement of the exhaust suction carriage (10) in direction (B) from the initial position (A) admit that There is a negative pressure in the exhaust extraction duct (5), but in the case of movement of the exhaust suction trolley (10) 504 844/4 in the direction (D) towards the initial position (A), there is no negative pressure in the exhaust extraction duct (5), whereby the frictional resistance between the sealing strips (8, 9) and the exhaust suction carriage (10) are smaller when they are moved in the direction (D) towards the initial position (A) than when they are moved in the direction (B) from the initial position (A), since the sealing strips (8, 9) abut against each other with greater pressure when there is a negative pressure in the exhaust extraction duct (5) than when there is no negative pressure in it.

Device according to claim 18, characterized in that the control device (38) has two contact means (39, 40), wherein the exhaust suction carriage (10) cooperates with one contact means (39) when it is moved in direction (B) from the initial position (A) and wherein said contact means (39) controls the negative pressure allowing device (37) to allow negative pressure generation in the exhaust extraction duct (5) during the movement of the exhaust suction carriage (10) to the second contact means (40), that the exhaust suction carriage (10) said movement cooperates with the second contact means (40), said second contact means (40) controlling the negative pressure granting device (37) to interrupt the negative pressure generation in the exhaust extraction duct (5), and that both contact means (39, 40) allow the the interrupted negative pressure generation in the exhaust extraction duct (5) remains interrupted when the exhaust suction carriage (10) cooperates with these contact means (39, 40) during its movement in direction (D) towards the initial position (A).

Device for extracting vehicle exhaust gases, wherein an exhaust extraction duct (5) is arranged in a room 504 s44 Sw (4) above a path (3) along which a vehicle (2) is intended to be driven, the exhaust extraction duct (5) having sealing strips (8, 9) which are intended to close it at the bottom, an exhaust suction trolley (10) being movable along the exhaust extraction duct (5) and having a hanging exhaust extraction hose (16), the exhaust suction trolley (10) being arranged to separate the sealing the strips (8, 9) so that exhaust gases can flow from the exhaust exhaust hose (16) and into the exhaust exhaust duct (5), the exhaust exhaust hose (16) being fitted to the vehicle (2) by means of a fastening and releasing device (18). that the exhaust extraction hose (16) is in an exhaust extraction position relative to an exhaust pipe (17) on the vehicle (2) and so that when driving along said path (3) pulls the exhaust suction trolley (10) along the exhaust extraction duct (5) in the direction ( B) from a starting position (A), a winding device (23) having a winding means (24) extending from the winding device (23) to the exhaust suction carriage (10) and arranged thereon so that it is rolled by the vehicle (23) from the winding device (23). 2) pulls the exhaust suction carriage (10) along the exhaust extraction duct (5) in direction (B) from the initial position (A), and wherein the winding device (23) has a winding assembly (26), which is arranged to wind up the windable means (24) to retract the exhaust suction carriage (10) in the direction (D) towards said initial position (A) after the fastening and releasing device (18) has released the exhaust extraction hose (16) from the vehicle (2), 504 844 characterized in that a winding device (23), which is made for other use, can be mounted to the exhaust exhaust duct (5), preferably by means of at least one fastening arm (30) which is mounted on an end portion (21) of the exhaust exhaust duct (5) and which is directed from said end portion (21) parallel or substantially parallel to the exhaust exhaust duct (5), the winding device (23) being arranged on the fastening arm (30) so that it is located a distance from said end portion (21).

A device for extracting vehicle exhaust gases, wherein an exhaust extraction duct (5) is arranged in a room (4) above a path (3) along which a vehicle (2) is intended to be driven, the exhaust extraction duct (5) having sealing strips (8, 9) which are intended to close these at the bottom, an exhaust suction carriage (10) being movable along the exhaust extraction duct (5) and having a hanging exhaust extraction hose (16), the exhaust suction trolley (10) being arranged to separate the sealing strips (8). , 9) so that exhaust gases can flow from the exhaust exhaust hose (16) and into the exhaust exhaust duct (5), the exhaust exhaust hose (16) being attached to the vehicle (2) by means of a fastening and releasing device (18) so that the exhaust exhaust hose (2) 16) is in an exhaust exhaust position in relation to an exhaust pipe (17) on the vehicle (2) and so that when driving along said path (3) it pulls the exhaust carriage (10) along the exhaust exhaust duct (5) in direction (B) from a starting position (A), 504,844 il a winding device (23) having a winding member (24) extending from the winding device (23) to the exhaust suction carriage (10) and arranged thereon so that it is unwound from the winding device (23) when the vehicle ( 2) pulls the exhaust suction trolley (10) along the exhaust extraction duct (5) in direction (B) from the initial position (A), the winding device (23) having a winding assembly (26), which is arranged to roll up the rewindable means (24) for retracting the exhaust suction carriage (10) in the direction (D) towards said initial position (A) after the fastening and releasing device (18) has released the exhaust extraction hose (16) from the vehicle (2), and wherein the rewinding assembly of the rewinding device (23) (26) is an electric motor which, upon actuation, can move the exhaust suction carriage (10) in the direction (D) towards the initial position (A) by rolling up the retractable member (24), characterized in that the electric motor is disengageable when it up - the rollable means (24) is unrolled as the exhaust suction carriage (10) moves in direction (B) from the initial position (A).

Device according to claim 21, characterized in that the electric motor is remotely controlled to start the winding device (23) of the winding means (24) by means of signals, for example infrared signals, emitted by a portable transmitter.