DK153077B

DK153077B - BOX OF PLASTIC ISAES FOR TRANSPORTING FRUIT

Info

Publication number: DK153077B
Application number: DK244981AA
Authority: DK
Inventors: Johannes Theodorus Krassenburg; Johannes Cornelis Molijn; Ernst Ettema
Original assignee: Wavin Bv
Priority date: 1980-06-04
Filing date: 1981-06-03
Publication date: 1988-06-13
Also published as: DE3166694D1; EP0041307A3; EP0041307A2; DK244981A; NL8003269A; EP0041307B1; DK153077C; ATE9884T1

Abstract

An injection moulded crate or tray comprising upstanding walls 1,2 and a bottom 4. The lower side of the bottom 4 is integral with two cases 5 extending parallel to an upstanding wall. The case or cases 5 open into a circumferential bottom edge 6. A pair of opposite walls 7,8 of each case 5 converges towards the centre of each case 5. The bottom 4 of the crate or tray inclines from each of the cases 5 towards the bottom edge 6, the bottom part between the cases 5 being a flat part.

Description

DK 153077BDK 153077B

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Opfindelsen angår en sprøjtestøbt plastikkasse eller bakke med opstående vægge og en bund, især til transport af hård frugt, hvilken kasse eller bakke er forstærket ved hjælp af mindst ét hult langstrakt forstærk-5 ningselement af plast, som er forbundet med undersiden af af kassens bund.BACKGROUND OF THE INVENTION This invention relates to an injection molded plastic box or tray with raised walls and a bottom, in particular for the transport of hard fruit, which box or tray is reinforced by at least one hollow elongated plastic reinforcing element connected to the underside of the bottom of the box .

Af en sådan kasse eller bakke må kræves, at bunden er tilstrækkelig stiv til at hindre den såkaldte "trampolin-virkning" under transport af frugt. Bunden må ikke 10 hænge ned under vægten af indholdet i kassen, når dens underside ikke er understøttet, selv ikke efter lang tids forløb. Bunden skal også være så flad, at den ikke kan frembringe indtrykninger i indholdet i kassen eller bakken, og undersiden af kassen må have en sådan udformning, at 15 snavs ikke kan samle sig på den, og således at tilfældig kontakt mellem frugten i en kasse nedenunder og bunden ikke frembringer indtrykninger af bunden i frugten.Such a box or tray must require that the bottom is sufficiently rigid to prevent the so-called "trampoline effect" during fruit transport. The bottom must not hang below the weight of the contents of the box when its underside is not supported, even after a long period of time. The bottom must also be so flat that it cannot produce impressions in the contents of the box or tray, and the underside of the box must be of such a design that 15 dirt cannot accumulate on it, and so that random contact between the fruit in a box the bottom and bottom do not produce impressions of the bottom in the fruit.

For at opfylde disse krav kunne man anvende en tyk, massiv bund, men dette medfører de ulemper, at kassen 20 eller bakken bliver tung, og at der skal bruges meget plastmateriale, samt at fremstillingen af kassen eller bakken bliver meget tidskrævende på grund af den tid, der er nødvendig til afkøling af emnet.To meet these requirements, a thick, solid base could be used, but this causes the disadvantages that the box 20 or tray becomes heavy and that a lot of plastic material must be used, and that the manufacture of the box or tray becomes very time-consuming because of the time needed to cool the subject.

Brug af forstærkningsribber under bunden af 25 plastkassen har den ulempe, at disse ribber kan frembringe indtrykninger i frugten ved stabling af kasserne oven på hinanden, hvorfor denne udformning heller ikke giver en tilfredsstillende løsning.The use of reinforcing ribs underneath the bottom of the plastic box has the disadvantage that these ribs can produce impressions in the fruit by stacking the boxes on top of one another, which is why this design also does not provide a satisfactory solution.

Formålet for opfindelsen er at overvinde de 30 nævnte ulemper, og dette er opnået ved det i den kendetegnende del af krav 1 angivne.The object of the invention is to overcome the disadvantages mentioned, and this is achieved by the characterizing part of claim 1.

Plastkassen eller bakken ifølge opfindelsen har den fordel, at der opnås en god forstærkning af bunden, samtidig med at kassedrageren eller -dragerne 35 kan gives en sådan form, at frugten ikke beskadiges eller får indtrykninger fra kassedrageren.The plastic box or tray according to the invention has the advantage that a good reinforcement of the bottom is obtained, while at the same time the box carrier (s) 35 can be given such that the fruit is not damaged or receives impressions from the box carrier.

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Det hule forstærkningselement kan herved på en enkel måde udformes samtidig med sprøjtestøbning af bakken eller kassen under anvendelse af indsatte støbekerner, som let kan udtrækkes efter støbningen.The hollow reinforcing element can hereby be designed in a simple manner at the same time as injection molding of the tray or box using inserted molding cores which can be easily extracted after the casting.

5 For at muliggøre en optimal og effektiv sprøjtestøb* ningsproces har bunden af forstærkningselementet som anført i det mindste én åbning, gennem hvilken kernen kan understøttes under sprøjtestøbningsprocessen. Til forstærkning af området rundt om denne åbning er dette 10 område afstivet med forstærkningsribber.In order to enable an optimal and efficient injection molding process, the bottom of the reinforcing element has at least one opening through which the core can be supported during the injection molding process. For reinforcing the area around this opening, this area is reinforced with reinforcing ribs.

Formen af bunden i plastkassen eller bakken vælges fortrinsvis således, at kassen kan hvile på et gulv med andre dele end forstærkningselementet eller -elementerne. Denne udformning er meget bekvem, idet 15 man ikke behøver at regne med beskadigelse af frugten, når en plastkasse eller bakke fyldes helt og derpå stables ovenpå en anden fyldt kasse eller bakke.The shape of the bottom of the plastic box or tray is preferably chosen such that the box can rest on a floor with parts other than the reinforcing element (s). This design is very convenient, since there is no need to expect damage to the fruit when a plastic box or tray is completely filled and then stacked on top of another filled box or tray.

For at opnå en mere jævn placering af plastkassen på gulvet, kan undersiden af bundens omkreds indbefatte 20 en bundkant, i hvilken forstærkningselementerne udmunder.In order to achieve a more even positioning of the plastic box on the floor, the underside of the bottom circumference may include a bottom edge into which the reinforcing elements open.

Højden af denne bundkant er fortrinsvis sådan, at forstærkningselementerne ikke kan komme'i kontakt med gulvet på det sted, hvor en kasse eller bakke hviler på dette, således at et tryk imod forstærkningselementerne 25 ikke vil forvrænge bunden af kassen eller bakken og derved forårsage beskadigelse af dens indhold. Ved at forsyne bundkanten med kantåbninger kan der tilvejebringes udløb for væske, såsom vaskevand og udsivende væsker samt for snavs.The height of this bottom edge is preferably such that the reinforcing elements cannot come into contact with the floor at the place where a box or tray rests thereon, so that a pressure against the reinforcing elements 25 will not distort the bottom of the box or tray, thereby causing damage of its content. By providing the bottom edge with edge openings, outlets can be provided for liquids such as wash water and leaking fluids as well as for dirt.

30 Dersom højden af to modstående dele af den nævnte bundkant i det mindste lokalt skulle være større end højden af to andre modstående dele af kanten og forstærkningselementerne, så kan der til transportformål indskydes en plade mellem kassens 35 højeste bundkantdele og gulvet.If, at least locally, the height of two opposite portions of said bottom edge is greater than the height of two other opposing portions of the edge and the reinforcing elements, then a plate may be inserted between the highest bottom edge portions of the box 35 and the floor.

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Opfindelsen forklares nærmere i det følgende i forbindelse med en udførelsesform og under henvisning til tegningen, hvor fig. 1 viser et perspektivisk billede af en 5 plastkasse eller -bakke ifølge opfindelsen, fig. 2 et snit gennem kassen efter linien II-II i fig. 1, fig. 3 et snit gennem en del af kassen efter linien III-III i fig. 1, og 10 . fig. 4 en del af kassens bund set nedefra.The invention will be explained in more detail below in connection with an embodiment and with reference to the drawing, in which fig. 1 is a perspective view of a plastic box or tray according to the invention; FIG. 2 is a section through the box along line II-II of FIG. 1, FIG. 3 is a section through a portion of the box along line III-III of FIG. 1, and 10. FIG. Figure 4 is a bottom view of the box.

Den i fig. 1 viste plastkasse består af to langsgående sidevægge 1 og to tværgående sidevægge 2, der er indbyrdes forbundne, fortrinsvis ved hjælp af hule hjørnestolper 3, der kan understøtte kasser, som anbringes 15 ovenpå. Plastkassen har endvidere en bund 4, der er forbundet med de langsgående sidevægge 1 og de tværgående sidevægge 2. Under bunden 2 findes to forstærknings-elementer i form af hule kassedragere 5, som fortrinsvis er åbne indtil en rundtgående bundkant 6 omkring 20 bunden 4, således at hver kassedrager 5 har to åbne ender.The FIG. 1, the plastic box shown in Fig. 1 consists of two longitudinal side walls 1 and two transverse side walls 2, which are interconnected, preferably by means of hollow corner posts 3, which can support boxes which are placed on top. Furthermore, the plastic box has a bottom 4 which is connected to the longitudinal side walls 1 and the transverse side walls 2. Below the bottom 2 are two reinforcing elements in the form of hollow box carriers 5, which are preferably open until a circular bottom edge 6 about the bottom 4, so that each box carrier 5 has two open ends.

Plastkassen ifølge opfindelsen har ventilationsåbninger, forstærkningsribber, håndtag og lignende i sig selv kendte dele, som ikke beskrives nærmere her.The plastic box according to the invention has ventilation openings, reinforcing ribs, handles and the like, per se known parts, which are not described further here.

25 Fig. 2 viser et tværsnit efter linien II-II i fig. 1. Som det ses af fig. 2 konvergerer kassedrageren 5 mod midten fra begge sine åbne ender. Den tilspidsende udformning af drageren letter udtagningen af kernerne efter sprøjtestøbning og hindrer endvidere beskadigelse 30 af væggene i drageren 5.FIG. 2 shows a cross section along line II-II of FIG. 1. As seen in FIG. 2, the box carrier 5 converges toward the center from both of its open ends. The tapered configuration of the support facilitates removal of the cores after injection molding and further prevents damage to the walls of the support 5.

Fig. 2 viser også at midten af kassedrageren har en åbning 7, som under sprøjtestøbningsprocessen er dannet af en (ikke vist) understøtning for sprøjtestøbeformen for at bære enderne af kernerne (heller ikke 35 vist), omkring hvilke kassedrageren 5 sprøjtestøbes. Til at forstærke området på hver kassedrager 5 rundt om 4FIG. 2 also shows that the center of the box carrier has an opening 7 which during the injection molding process is formed by a (not shown) support for the injection mold to support the ends of the cores (also shown) around which the box carrier 5 is injection molded. To reinforce the area of each box carrier 5 around 4

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åbningen 7 findes der forstærkningsvinkler 8 i nærheden af åbningen 7.in the opening 7 there are reinforcing angles 8 in the vicinity of the opening 7.

Pig. 3 viser et delsnit gennem plastkassen efter linien III-III i fig. 1. I denne foretrukne ud-5 førelsesform er to kasser 5 anbragt ovenover planet gennem de fri ender af en rundtgående bundkant 6, medens bunden 4 skråner fra kassedrageren 5 mod de kantdele af bunden, som forløber parallelt med kassedrageren eller -dragerne. På passende steder er der i de nederste dele 10 af bunden 4 udformet huller 9, som danner udløb for væske og fugtighed og ventilationshuller. Bunddelen mellem de to parallelle kassedragere 5 er flade.Pig. 3 is a partial section through the plastic box along line III-III of FIG. 1. In this preferred embodiment, two boxes 5 are disposed above the plane through the free ends of a circumferential bottom edge 6, while the bottom 4 slopes from the box carrier 5 towards the edge portions of the bottom which extend parallel to the box carrier (s). At appropriate locations, holes 9 are formed in the lower portions 10 of the bottom 4 which form outlets for liquid and moisture and ventilation holes. The bottom portion between the two parallel box carriers 5 is flat.

Et eller flere huller 10 i bundkanten 6 giver ventilation og udløb af f.eks. vaskevand eller udsivende 15 vand fra den del af gulvet, som befinder sig under plastkassen eller bakken.One or more holes 10 in the bottom edge 6 provide ventilation and outlet of e.g. wash water or leaking water from the part of the floor that is under the plastic box or tray.

Ved at give et par modstående dele af bundkanten 6 en større højde end det andet par modstående dele og kassedragerne eller -dragerne 5 fås en slidsformet åbning 20 mellem gulvet og kassen eller bakken som står på dette.By giving a pair of opposite parts of the bottom edge 6 a greater height than the other pair of opposite parts and the box supports (s) 5, a slit-shaped opening 20 is obtained between the floor and the box or tray which stands on this.

Ved at skubbe en plade gennem den nævnte åbning og ned under kassen eller bakken, kan denne let transporteres f.eks. ved hjælp af en gaffelløfter.By pushing a plate through said opening and down below the box or tray, it can be easily transported e.g. using a fork lift.

Det bemærkes, at dersom bundkanten 6 ikke 25 fandtes, og der var direkte kontakt mellem kassedragerne 5 og gulvet, så ville en sådan transport kun kunne foregå ved forskydning af en enkelt kasse eller en stabel af kasser, som stod på gulvet.It should be noted that if the bottom edge 6 was not found and there was direct contact between the box carriers 5 and the floor, such transport could only be effected by displacing a single box or a stack of boxes standing on the floor.

Fig. 4 viser set nedefra en del af bunden med 30 en åbning 7 i kassedrageren 5. På denne figur ses endvidere forstærkningsribber 8, som foran er omtalt i forbindelse med fig. 2 og 3. Hver ribbe strækker sig i det mindste mellem to vægge i kassedrageren og har dennes konvergerende form.FIG. 4 is a bottom view of a portion of the base 30 having an opening 7 in the box carrier 5. In this figure, furthermore, reinforcement ribs 8 mentioned above in connection with FIG. 2 and 3. Each rib extends at least between two walls of the box carrier and has its converging shape.

I nogle tilfælde kan det være hensigtsmæssigt at lukke de åbne ender af den hule kassedrager 5 med lukkeflige 13, som er hængslet forbundne med bunden af 35In some cases, it may be convenient to close the open ends of the hollow box carrier 5 with closure tabs 13 hingedly connected to the bottom of the

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drageren 5. Fligene 13 er i såfald forsynet med knaster 14, som griber ind i fordybninger eller huller 15 i kassedragerens overside.carrier 5. The tabs 13 are then provided with lugs 14 which engage in recesses or holes 15 in the upper side of the box carrier.

Som foran anført er der i undersiderne af kasse-5 dragerne 5 udformet åbninger 7, som er dannet under sprøjtestøbningen på grund af tilstedeværelsen sf understøtninger for de kerner, som er nødvendige for at forme kassedragerne 5. Disse åbninger 7 kan lukkes med et dæksel 11, der bærer knaster 12, som griber ind i 10 bunddelen i kassedrageren 5.As stated above, apertures 7 are formed in the undersides of the box 5 supports 5 which are formed during the injection molding due to the presence of supports for the cores necessary to form the box supports 5. These openings 7 can be closed with a cover 11 carrying lugs 12 which engage the bottom portion of the box carrier 5.

15 20 25 30 3515 20 25 30 35

Claims

A plastic box or tray with upright walls (1/2) and a bottom (4) and for the purpose of transporting hard fruit, which box or tray is reinforced by at least one hollow elongated reinforcing element ( 5) of plastics connected to the bottom of the box (4), characterized in that the box or tray is injection molded, that the hollow reinforcing element (5) has at least one pair of opposite walls converging 10 towards the center of the reinforcing element (5). ), and that the bottom of the reinforcing element has at least one opening (7) and that the area near the opening is reinforced with reinforcing ribs (8).

Box according to claim 1, characterized in that each pair of opposing walls in a box-shaped reinforcing element (5) converges towards the center of the reinforcing element.

Box according to claim 1 or 2, characterized in that the reinforcing element (5) has at least one opening (7) in the vicinity of its center.

Box according to one or more of the preceding claims, characterized in that it has two mutually parallel reinforcing elements (5) and the bottom (4) lies in a substantially horizontal plane between the two elements (5), and none of the reinforcing elements (5) extend below the other bottom portions of the box.

Box according to claim 4, characterized in that the lower parts of the bottom are provided with bottom openings (9).

Box according to claims 1-5, characterized in that the reinforcing elements (5) extend into a bottom edge (6) extending around the bottom (4), which bottom edge (6) is preferably higher than the reinforcing element (s) ( 5).

Box according to claim 5 or 6, characterized in that the underside of the bottom edge (6) has locally arranged edge openings (10). DK 153077B 0

Box according to claim 5 or 7, characterized in that the reinforcing element or elements (5) and the bottom edge (6) have such a dimension that the edge extends locally beyond the reinforcing element or elements. 10 15 20 25 30 35