DK143745B - Conveyor with means of shortening the interval between conveyed items - Google Patents

Conveyor with means of shortening the interval between conveyed items Download PDF

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Publication number
DK143745B
DK143745B DK360879A DK360879A DK143745B DK 143745 B DK143745 B DK 143745B DK 360879 A DK360879 A DK 360879A DK 360879 A DK360879 A DK 360879A DK 143745 B DK143745 B DK 143745B
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Denmark
Prior art keywords
chain
station
conveyor
guide
distance
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DK360879A
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Danish (da)
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DK143745C (en
DK360879A (en
Inventor
E Aagaard
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Hoeyer As O G
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Description

i 143745in 143745

Opfindelsen angår en transportør til overføring af genstande mellem en første station og en anden station ved hjælp af medbringere, som med indbyrdes afstand er fastgjort til et endeløst drivelement, og med midler 5 til ændring af to på hinanden følgende medbringeres indr byrdes afstand i transportretningen fra én værdi i den første station til en lavere værdi i en anden station.BACKGROUND OF THE INVENTION 1. Field of the Invention The invention relates to a conveyor for transferring objects between a first station and a second station by means of carriers, which are spaced apart at an endless drive element, and by means 5 for changing two successive carriers' distance in the transport direction from one value in the first station to a lower value in a second station.

Sådanne transportører kan anvendes, hvor flere bag hinanden beliggende genstande eller rækker af gen-10 stande i den nævnte første station optages samtidig fra en produktionslinie og i den anden station afleveres samtidig til en samleemballage, og hvor produktionsliniens opbygning betinger, at genstandene eller rækkerne af genstande ankommer til optagestationen med en rela-15 tivt stor afstand, medens de i emballagen kan anbringes tættere ved hinanden.Such conveyors may be used where several consecutive articles or rows of articles in said first station are received simultaneously from a production line and in the second station are simultaneously delivered to an assembly package and where the structure of the production line requires that the articles or rows of articles arrive at the recording station at a relatively large distance, while they can be placed closer together in the packaging.

Fra britisk patentskrift nr. 653 434 kendes en transportør af denne art, hvis drivelement er en speciel kæde med styreruller monteret på enderne af hængsel-20 tappene mellem kædeleddene. Afstanden mellem de på kædeleddene siddende medbringere forkortes ved, at styrerullerne, f.eks. ved hjælp af periodisk svingende sporskifter eller roterende stjernehjul, ledes skiftevis ind i ene og det andet af to sæt dobbelte styrespor place-25 ret med indbyrdes afstand på tværs af transportretningen, hvorved kæden foldes i siksakform. Belastningen fra de i medbringerne ophængte byrder fremkalder i kædens siksakfolde afsnit relativt store kræfter, som giver anledning til torsionsspændinger i kædeleddene og 30 høje lokale sidetryk med tilhørende friktion mellem styrerullerne og de stationære styrespor. Konstruktionen er også kompliceret og er bundet til en bestemt længde af kædeleddene og tilsvarende en bestemt afstand mellem successive medbringere. Da kædeleddene må være 35 forholdsvis lange, bliver kædens bevægelse temmelig uregelmæssig på grund af polygonvirkningen af kædens driv- og strammehjul.British Patent Specification No. 653 434 discloses a conveyor of this kind, the drive element of which is a special chain of guide rollers mounted on the ends of the hinge pins between the chain links. The distance between the chains on the chain links is shortened by the guide rollers, e.g. by means of periodically swinging track switches or rotating star wheels, alternately in one and the other two pairs of double guide tracks are spaced across the transport direction, thereby folding the chain in zigzag shape. The load from the loads suspended in the carrier produces relatively large forces in the chain zigzag fold, which give rise to torsional stresses in the chain links and 30 high local side pressures with associated friction between the guide rollers and the stationary guide tracks. The construction is also complicated and is tied to a specific length of the chain links and correspondingly a certain distance between successive drivers. Since the chain links must be 35 relatively long, the chain's movement becomes rather irregular due to the polygon action of the chain's drive and tension wheels.

En transportør ifølge nærværende opfindelse er 143745 2 ejendommelig ved, at de nævnte midler til ændring af medbringernes afstand består af flere efter hinanden i transportretningen anbragte føringselementer med jævnt buede føringsflader for drivelementet, hvilke fø-5 ringsfladers krumning vender skiftevis i den ene og den anden retning.A conveyor according to the present invention is characterized in that said means for changing the distance of the carriers consist of several successively arranged guide elements with evenly curved guide faces for the drive element, the curvature of the guide surfaces alternating in one and the other. direction.

I en således udformet transportør antager drivelementet i sit "forkortede" afsnit en jævnt slynget eller bølget form, hvor elementet over en væsentlig del 10 af sin længde har anlæg mod de successive føringsflader.In such a conveyor, the driving element in its "abbreviated" section assumes an evenly curved or wavy shape, with the element abutting a substantial portion 10 of its length against the successive guide surfaces.

De ydre kraftpåvirkninger fordeles derfor over en større del af elementets længde, hvorved de optrædende spændinger og fladetryk bliver mindre. Konstruktionen er ukompliceret og tilsvarende driftsikker, specielt 15 fordi der ikke kræves særskilte hjælpemekanismer til at styre drivelementets forkortelse. Som drivelement kan anvendes standardiserede transportkæder med vilkårligt korte ledlængder eller endog simple remme, hvorved transportørens bevægelse kan foregå meget jævnt. En 20 ændring af afstanden mellem medbringerne langs drivelementet kan ske uden større indgreb i konstruktionen.The external force effects are therefore distributed over a greater part of the length of the element, thereby reducing the occurring stresses and surface pressures. The construction is uncomplicated and similarly reliable, especially 15 because no separate auxiliary mechanisms are required to control the shortening of the drive element. As a driving element can be used standardized transport chains with arbitrarily short link lengths or even simple belts, whereby the movement of the conveyor can be very smooth. A change in the distance between the drivers along the drive element can occur without major interference with the construction.

I en foretrukket udførelsesform af opfindelsen udgøres føringselementerne af drejeligt lejrede ruller med cirkulære føringsflader, hvis centre ligger symme-25 trisk i forhold til en med transportretningen parallel linie. Den heraf betingede reduktion af de optrædende friktionskræfter gør det muligt at anvende et vilkårligt stort antal føringselementer uden risiko for overbelastning eller blokering af drivelementet.In a preferred embodiment of the invention, the guide members are constituted by pivotally mounted rollers with circular guide faces, the centers of which are symmetrical with respect to a line parallel to the conveying direction. The consequent reduction of the frictional forces occurring makes it possible to use any number of guide elements without the risk of overloading or blocking the driving element.

30 Det er hensigtsmæssigt at medbringerne udgøres af stænger, som ved deres ene ende er fastgjort til drivelementet og ved deres modsatte ende er styret i en retliniet føring. Herved opnås at de i stængernes sidstnævnte ender ophængte byrder hele tiden bevæger sig i 35 en ret linie og således ikke deltager i de - lodrette eller vandrette - udsving, som de til drivelementet fastgjorte ender af stængerne udfører. Endvidere aflastes selve drivelementet for vægten af de transportere- 3 163745 de genstande.It is convenient for the carriers to be constituted by rods which are fixed at one end to the drive element and at their opposite end are guided in a rectilinear guide. This results in the fact that the loads suspended at the latter ends of the rods are constantly moving in a straight line and thus do not participate in the - vertical or horizontal - fluctuations which the ends of the rods fixed to the drive element perform. Furthermore, the actual drive element for the weight of the transported items is relieved.

Opfindelsen forklares i det følgende nærmere under henvisning til den skematiske tegning, på hvilken fig. 1 viser et sidebillede af en første udførel-5 sesform for transportøren ifølge opfindelsen, fig. 2 et udsnit i større skala af en ændret udførelsesform for transportøren, fig. 3 et snit i større skala efter den brudte linie III-III i fig. 1, og 10 fig. 4 et tilsvarende snit efter linien IV-IV i fig. 1.The invention will now be explained in more detail with reference to the schematic drawing, in which FIG. 1 is a side view of a first embodiment of the conveyor according to the invention; FIG. 2 is a larger scale view of a modified embodiment of the conveyor; FIG. 3 is an enlarged sectional view of the broken line III-III in FIG. 1 and 10 in FIG. 4 shows a similar section along line IV-IV in FIG. First

Fig. 1 viser rent skematisk en transportør, som tjener til overføring af ikke viste genstande fra en optagestation I til en aflæggestation II. Genstandene, 15 som f.eks. kan være bægre eller flasker med indhold af levneds- eller nydelsesmidler , overføres ved hjælp af gribere 1, hvis udformning er opfindelsen uvedkommende, men generelt bestemt af de overførte genstandes udformning. Hver griber 1 er ophængt i den ene ende 20 2 af en stang 3, som ved sin anden ende 4 er hæng slet fastgjort til en endeløs kæde 5, som er ført over to kædehjul 6, af hvilke mindst det ene er drevet. Stangenderne 2 er styret i en endeløs føring 7, som omfatter et retliniet afsnit 9 mellem stationerne 25 I og II, et dermed parallelt retliniet returafsnit 10 og to halvcirkulære vendeafsnit 11.FIG. 1 is a schematic representation of a conveyor which serves to transfer objects not shown from a recording station I to a dispensing station II. The objects, such as e.g. may be beakers or bottles containing food or enjoyment agents, transmitted by grippers 1, the design of which is not a matter of the invention, but generally determined by the design of the transferred articles. Each gripper 1 is suspended at one end 20 2 by a rod 3, which at its other end 4 is hingedly attached to an endless chain 5 which is passed over two sprockets 6, at least one of which is driven. The rod ends 2 are guided in an endless guide 7 which comprises a rectilinear section 9 between stations 25 I and II, a parallel rectilinear return section 10 and two semicircular turning sections 11.

I station I forløber kæden 5 efter en ret linie parallel med føringsafsnittet 9. I station II er kædens forløb derimod slynget eller bølget, idet kæ-30 den er ført over en række indbyrdes ens kædehjul 8 placeret med indbyrdes afstand i transportørens fremføringsretning, som i fig. 1 er markeret med en pil 12* med deres centre beliggende på en tænkt ret linie, som forbinder de retliniede afsnit af kæden før og efter 35 station II. Som følge heraf bliver afstanden b 1 transportretningen 12 mellem successive stangender 2 og de deri ophængte gribere 1 i station II mindre end afstanden a i station I, hvor afstanden er 4 143745 lig med afstanden mellem de punkter, hvori stangenderne 4 er fastgjort til kæden 5.In station I, the chain 5 extends along a straight line parallel to the guide section 9. In station II, on the other hand, the course of the chain is twisted or wavy, the chain 30 being passed over a series of mutually identical sprockets 8 spaced apart in the conveying direction of the conveyor, as in FIG. 1 is marked with an arrow 12 * with their centers located on a contemplated straight line connecting the rectilinear sections of the chain before and after station II. As a result, the distance b in the transport direction 12 between successive rod ends 2 and the grippers 1 suspended therein in station II becomes less than the distance a in station I, the distance being 4 equal to the distance between the points at which the rod ends 4 are attached to the chain 5.

Når kæden 5 bevæges intermitterende i skridt af længden 3a, kan der under hver stilstandsperiode af kæ-5 den samtidig aflægges tre genstande fra griberne i station II, samtidig med at tre genstande optages i station I.As the chain 5 moves intermittently in steps of length 3a, during each standstill period of the chain, three objects can be simultaneously deposited from the grippers in station II, while at the same time three objects are taken up in station I.

I fig. 1 er kæden 5 og føringen 7 for overskuelighedens skyld vist forsat for hinanden i lodret ret-10 ning, men i praksis vil det ofte være hensigtsmæssigt at placere dem lige bag hinanden, hvilket er antydet i fig. 2, som i større skala viser et udsnit af aflægningsstationen II i en ændret udførelsesform, med benyttelse af samme henvisningstal.In FIG. 1, for clarity, the chain 5 and the guide 7 are shown perpendicular to each other in the vertical direction, but in practice it will often be convenient to place them directly behind one another, as indicated in FIG. 2, which shows on a larger scale a section of the laying station II in a modified embodiment, using the same reference numerals.

15 Det vil ses, at kædehjulene 8 i denne udførel sesform er forsat skiftevis over og under føringen 7, og som følge af kæden 5's symmetri omkring denne føring er det for givne værdier af afstandene a og b muligt at anvende større kædehjul 8 end i fig. 1, så-20 ledes at kædens bøjninger omkring hjulene bliver mindre skarp.It will be seen that the sprockets 8 in this embodiment are positioned alternately above and below the guide 7, and because of the symmetry of the chain 5 around this guide, for given values of the distances a and b it is possible to use larger sprockets 8 than in FIG. . 1, so that the bends of the chain around the wheels are less sharp.

I begge udførelsesformer må kædehjulene 8 og den eventuelle forsætning af hjulenes centre i lodret retning, som vist i fig. 2, dimensioneres således, at 25 afstanden mellem to successive stangenders fastgørelsespunkter, målt langs den slyngede del af kæden 5, er lig med a, samtidig med at afstanden mellem de samme to punkter målt langs kædens retliniede afsnit er lig med b.In both embodiments, the sprockets 8 and the optional displacement of the centers of the wheels must be vertical, as shown in FIG. 2, is dimensioned such that the distance between two points of attachment of successive bars measured along the coiled portion of the chain 5 is equal to a, while the distance between the same two points measured along the rectilinear section of the chain is equal to b.

30 Som ovenfor beskrevet frembringer transportøren som følge af kæden 5's slyngede afsnit en forkortelse af genstandenes indbyrdes afstand fra optagestationen til aflæggestationen, men det vil forstås, at den kan benyttes med den modsatte bevægelsesretning af kæden, 35 når den ønskede afstand i aflæggestationen er større end afstanden i optagestationen.As described above, as a result of the winding section of the chain 5, the conveyor shortens the distance between the objects from the receiving station to the deposition station, but it will be understood that it can be used with the opposite direction of movement of the chain when the desired distance in the deposition station is greater than the distance in the recording station.

Fig. 3 og 4 anskueliggør skematisk nogle detaljer i en praktisk udførelsesform for den i fig. 1 viste 143745 5 transportør med to parallelle drivkæder 5 og føringer 7 og med rækker af gribere eller medbringere 1 anbragt mellem de to kæder og føringer vinkelret på tegningsplanen i fig. 1.FIG. 3 and 4 schematically illustrate some details of a practical embodiment of the embodiment shown in FIG. 1 shows conveyor with two parallel drive chains 5 and guides 7 and with rows of grippers or drivers 1 arranged between the two chains and guides perpendicular to the drawing plane of FIG. First

Fig, 3 og 4 viser hver en række på fire gribere 1 ophængt i en travers 13 med udragende akseltappe 14, på hvilke styreruller 15, som indgriber i de to føringer 7, er drejeligt lejret. Akseltappene 14 tjener endvidere som hængseltappe for de nedre stangender 2. Stængerne 3's øvre ender 4 er drejeligt lejret på udragende hængseltappe fra kæden 5, og disse tappe bærer endvidere styreruller 16, som på de ret-liniede afsnit af kæden, se fig. 3, er styret i retli-niede føringer 17.Figures 3 and 4 each show a row of four grippers 1 suspended in a traverse 13 with projecting shaft pins 14 on which guide rollers 15 engaging the two guides 7 are pivotally mounted. The shaft pins 14 further serve as hinge pins for the lower rod ends 2. The upper ends 4 of the rods 3 are pivotally mounted on protruding hinge pins from the chain 5, and these pins also carry guide rollers 16, as on the rectilinear sections of the chain, see FIG. 3, is guided in rectilinear guides 17.

I kæden 5's slyngede afsnit, som ses i snit i fig. 4, indgriber kædens ruller 16 i kædehjulene 8's tandmellemrum. Kædehjulene er som antydet i fig. 4 drejeligt lejret på tappe 18, som er fastgjort i transportørens ikke viste stativ.In the winding section of the chain 5, which is seen in section in FIG. 4, the chain rollers 16 engage the sprockets 8 of the sprockets 8. The sprockets are as indicated in FIG. 4 is rotatably mounted on pin 18, which is secured in the carrier not shown.

Det retliniede returafsnit af kæden 5 kan være styret i retliniede føringer svarende til de i fig. 3 viste føringer 17. Ved overgangene mellem kædens retliniede og slyngede afsnit kan den, som antydet i fig.The rectilinear return section of the chain 5 may be guided in rectilinear guides similar to those in FIG. 3 at the crossings between the straight and twisted sections of the chain, as indicated in FIG.

1, være styret af to mindre lederuller 19 eller af stationære føringsafsnit med tilsvarende krumning.1, be guided by two smaller guide rollers 19 or by stationary guide sections with corresponding curvature.

DK360879A 1979-08-29 1979-08-29 TRANSPORTERS WITH Means to Shorten the Distance Between Transported Items DK143745C (en)

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DK360879A DK143745C (en) 1979-08-29 1979-08-29 TRANSPORTERS WITH Means to Shorten the Distance Between Transported Items

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DK360879 1979-08-29
DK360879A DK143745C (en) 1979-08-29 1979-08-29 TRANSPORTERS WITH Means to Shorten the Distance Between Transported Items

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DK360879A DK360879A (en) 1981-03-01
DK143745B true DK143745B (en) 1981-10-05
DK143745C DK143745C (en) 1982-03-22

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