DK155689B

DK155689B - FEEDER

Info

Publication number: DK155689B
Application number: DK146481A
Authority: DK
Inventors: Birger Andersen
Original assignee: Eskofot As
Priority date: 1981-03-31
Filing date: 1981-03-31
Publication date: 1989-05-01
Also published as: DK146481A; DK155689C

Description

iin

DK 155689 BDK 155689 B

Opfindelsen angår et apparat til fremføring af mindst to eventuelt forskellige materialebaner, f.eks. filmstrimler, der fra hver sin føderulle og af hvert sit sæt føringsorganer kan føres frem til en behandlingsstation, fortrinsvis en afskærings-5 station.The invention relates to an apparatus for conveying at least two possibly different material webs, e.g. film strips which can be fed from their respective feed rollers and from their respective sets of guide means to a treatment station, preferably a cutting station.

Ved behandlingsstationen, fortrinsvis afskæringsstationen, vil de to materialenamer mødes og ligge så tæt op imod hinanden, at den ene bane under sin fremføring vil kunne trække den an-10 den bane en smule med, hvorved man ikke alene får behandlet, f.eks. afskåret, et stykke af den ønskede bane, men også et mindre stykke af den anden bane. Det sidste er man selvsagt interesseret i at undgå, dels fordi man ellers skulle opsamle affaldet, og dels fordi der i så fald ville være tale om mate-15 rialespiId.At the treatment station, preferably the cutting station, the two material names will meet and lie so close to each other that one web during its conveyance will be able to pull the other web a little along, whereby one does not get treated alone, e.g. cut off, one piece of the desired web, but also a smaller piece of the other web. The latter, of course, one is interested in avoiding, partly because one would otherwise have to collect the waste, and partly because in that case there would be a material waste.

Formålet med opfindelsen er derfor at tilvejebringe et apparat, hvormed man kan undgå, at den ene bane trækker den anden bane med ind i behandlingsområdet.The object of the invention is therefore to provide an apparatus with which one can prevent one web from dragging the other web into the treatment area.

2020

Dette formål er ifølge opfindelsen opnået ved at de to sæt fremføringsorganer er koblet til hinanden gennem et transmissionsorgan, således at en fremføring af det ene sæt fremføringsorganer giver anledning til en tilbageføring, fortrinsvis 25 en forholdvis kort tilbageføring af det andet sæt fremførings organer, hvilket transmissionsorgan omfatter et eller flere roterbare legemer, fortrinsvis et ulige antal, idet i hvert fald et af de roterbare legemer kun er aktivt over en del af sin periferi.This object is achieved according to the invention in that the two sets of conveying means are coupled to each other through a transmission means, so that a conveying of one set of conveying means gives rise to a return, preferably a relatively short return of the other set of conveying means, which transmission means comprises one or more rotatable bodies, preferably an odd number, at least one of the rotatable bodies being active only over a part of its periphery.

3030

En fremføring af den ene materialebane i det ene sæt fremføringsorganer vil dermed via transmissionsorganet medføre en tilbageføring af den anden materialebane, idet andet sæt føringsorganer dog kun trækker den anden materialebane et lille 35 stykke tilbage.A feed of the one material web in the one set of feed means will thus via the transmission means entail a return of the other material web, the second set of guide means, however, only pulling the other material web back a small distance.

Det enkelte roterbare legeme kan med fordel udgøres af en friktionsrulle med en første radius over størstedelen af peri-The individual rotatable body can advantageously be constituted by a friction roller with a first radius over the majority of the peri-

DK 155689BDK 155689B

2 ferien og en anden lidt mindre radius over den øvrige del af periferien, hvilken rulle er placeret imellem de to sæt føringsorganer, der fortrinsvis udgøres af ruller, således at begge føringsorganer netop kan tangere den aktive del af frik-5 tionsrullens periferi. Derved opdeles rullens overflade på enkel måde i en aktiv og en inaktiv del.2 holiday and another slightly smaller radius over the rest of the periphery, which roller is placed between the two sets of guide means, which are preferably constituted by rollers, so that both guide means can precisely tangent to the active part of the periphery of the friction roller. Thereby, the surface of the roller is divided in a simple manner into an active and an inactive part.

I apparatet ifølge opfindelsen kan hver af føringsorganerne omfatte to ruller, fortrinsvis en drivrulle og en tomgangs-lø rulle, hvorimellem materialebanerne kan føres frem, og frik-tionsrullen kan som et mellemhjul være placeret således, at den aktive del af hjulets periferi tangerer de to tomgangsruller, der ligger imellem de to materialebaner. Derved opnås et særligt enkelt transmissionsorgan.In the apparatus according to the invention, each of the guide means may comprise two rollers, preferably a drive roller and an idle-loose roller, between which the webs of material can be advanced, and the friction roller may be positioned as an intermediate wheel so that the active part of the wheel periphery touches the two idle rollers located between the two material webs. Thereby a particularly simple transmission means is obtained.

1515

Det roterbare legeme kan endvidere være udformet som et tandhjul, der kun er fortandet langs en del af periferien. Et sådant tandhjul vil kunne gå i indgreb med tandhjul monteret ko-aksialt med og fastgjort til føringsrullerne.The rotatable body can furthermore be designed as a gear wheel which is only toothed along a part of the periphery. Such a gear will be able to engage gears mounted co-axially with and attached to the guide rollers.

2020

Ifølge opfindelsen kan det roterbare legeme endvidere være udformet som et ringhjul med en indvendig fortanding langs en del af inderfladen.According to the invention, the rotatable body can furthermore be designed as an annular wheel with an internal toothing along a part of the inner surface.

25 Transmissionsorganet kan også udgøres af to tandhjul i forbindelse med en kæde, der kun har masker over en del af sin længde. Endelig kan ifølge opfindelsen kæden have masker hele vejen rundt, medens tandhjulene på føringsorganerne kun er udstyret med tænder over en del af deres periferi.The transmission means can also be constituted by two gears in connection with a chain which has meshes only over a part of its length. Finally, according to the invention, the chain can have meshes all the way around, while the gears on the guide means are only equipped with teeth over a part of their periphery.

3030

Opfindelsen skal i det følgende forklares nærmere under henvisning til tegningen, hvor fig. 1 viser et apparat ifølge opfindelsen, fig. 2 et transmissionsorgan med tilstødende føringsorganer, og 35 3The invention will be explained in more detail below with reference to the drawing, in which fig. 1 shows an apparatus according to the invention, fig. 2 a transmission means with adjacent guide means, and 3

DK 155689 BDK 155689 B

fig. 3 samme i en anden stilling.fig. 3 same in another position.

Fig. 1 viser et apparat til fremføring af to materialebaner a og d. Materialebanen a fra den ene føderulle F kan via nogle 5 føringsruller Al og A2 trækkes frem til en afskæringsstation H. Den anden materialebane d fra en anden førerulle 6 kan også via nogle føringsruller Dl, D2 trækkes frem til afskæringsstationen H, hvor materialebanen afskæres med en let snoet kniv, der kan rotere i forhold til et faststående knivblad, og hvor-10 fra de afskårne materialestykker eventuelt kan placeres på en sugeplade. En del af føringsrullerne kan udgøres af drivruller. I den viste udførelsesform er føringsrullen A2 en drivrulle. Materialebanen d har desuden et sæt yderligere drivruller E, der er placeret nærmere ved føderullen 6.FIG. 1 shows an apparatus for conveying two material webs a and d. The material web a from one feed roller F can be pulled via some guide rollers A1 and A2 to a cutting station H. The second material web d from another guide roller 6 can also via some guide rollers D1 , D2 is pulled forward to the cutting station H, where the web of material is cut with a slightly twisted knife which can rotate relative to a fixed knife blade, and from which the cut pieces of material can optionally be placed on a suction plate. Part of the guide rollers can be constituted by drive rollers. In the embodiment shown, the guide roller A2 is a drive roller. The web of material d also has a set of additional drive rollers E located closer to the feed roller 6.

15 Føringsrul lerne A2, Al of D2 er placeret under hinanden og så tæt, at et transmissionsorgan i form af et mellemhjul M netop kan tangere de to nærmeste føringsruller Al og D2.The guide rollers A2, A1 or D2 are located below each other and so close that a transmission means in the form of an intermediate wheel M can precisely tangent to the two nearest guide rollers A1 and D2.

20 I fig. 2 og 3 er de tre ruller M, Al og D2 vist separat.In FIG. 2 and 3, the three rollers M, A1 and D2 are shown separately.

Apparatets virkemåde vil i det følgende blilve nærmere forklaret under henvisning til fig. 2 og 3.The operation of the apparatus will be explained in more detail below with reference to fig. 2 and 3.

25 Når materialebanen a trækkes frem, vil fremføringsrullen Al rotere i pilen Pl's retning, og mellemhjulet M vil rotere i modsat retning, så længe den aktive del af periferien berører føringsrullen Al. Mellemhjulet M vil derved påvirke føringsrullen D2, således at denne rulle også roterer, hvorved mate-30 rialebanen d føres tilbage. Når den inaktive del m af periferien når op til klemstedet Ka mellem de to ruller Al og M, standser mellemhjulet M i den stilling, der ses i højre halvdel af fig. 2. Dermed standser også rullen D2 og dermed tilbageføringen af materialebanen d. Selv om en del af materia-35 lebanen d stadig skulle være i berøring med banen a, kan banen d ikke trækkes med længere, eftersom rullen D2 er bremset i sin fremføringsretning som følge af, at mellemhjulet M ikke vil kunne rotere i D2's fremføringsretning, så længe rullen Al fremfører materialebanen a.When the web of material a is pulled forward, the feed roller A1 will rotate in the direction of the arrow P1, and the intermediate wheel M will rotate in the opposite direction as long as the active part of the periphery touches the guide roller A1. The intermediate wheel M will thereby actuate the guide roller D2, so that this roller also rotates, whereby the material web d is returned. When the inactive part m of the periphery reaches the clamping point Ka between the two rollers A1 and M, the intermediate wheel M stops in the position seen in the right half of fig. 2. This also stops the roller D2 and thus the return of the material web d. Even if a part of the material web d should still be in contact with the web a, the web d can no longer be towed, since the roller D2 is braked in its direction of travel as due to the fact that the intermediate wheel M will not be able to rotate in the feed direction of D2 as long as the roller A1 feeds the web of material a.

Claims

A2 and D1, D2, so that both guide means can precisely tangent to the active part of the periphery of the friction roller. Patent claims.

Apparatus for conveying at least two different material webs (a, d), e.g. film strips which can be fed from their respective feed rollers (F, g) and from their respective sets of guide means (A1, A2, D1, D2) to a treatment station, preferably a cutting station (H), characterized in that they two sets of conveying means (A1, A2, D1, D2) are coupled to each other through a transmission means (M), so that a conveying of one set of conveying means gives rise to a return, preferably a relatively short return of the other set conveying means, which transmission means (M) comprises one or more rotatable bodies, preferably an odd number, at least one of the rotatable bodies being active only over a part of its periphery.

Apparatus according to claim 1, characterized in that the individual rotatable body is constituted by a friction roller (M) with a first radius (R) over most of its periphery and a second slightly smaller radius (r) over the rest of the periphery , which roller is placed between the two sets of feed means, which are preferably constituted by rollers (A1, A2, D1, D2), so that both guide means can precisely tangent to the active part of the periphery of the friction roller. 20

Apparatus according to claim 2, wherein each of the guide means (A1, A2, D1, D2) comprises two rollers, preferably a drive roller and an idle roller, between which the material webs can be advanced, characterized in that friction roller 11 a (M) as a flour 25 impellers are positioned so that the active part of the periphery of the wheel is tangent to the two idle rollers (A1, D2) which lie between the two material webs (a, d).

Apparatus according to claim 1, characterized in that the rotatable body (M) is constituted by a gear which is toothed only along a part of the periphery.

Apparatus according to claim 1, characterized in that the rotatable body is constituted by a ring wheel with an internal toothing along a part of the inside.

Apparatus according to claim 1, characterized in that the rotatable bodies are constituted by gears, a corresponding gear chain having only meshes over a part of its length and pulling one or more gears mounted coaxially with and in extension of the guide means, and the gears rotate together with the guide means. 5 10 15 20 25 30 35