FI79816B - HOPVIKBART TRAOG. - Google Patents

Abstract

A collapsible tray produced from a rigid blank. Two walls (6, 8) of the tray are each provided with a respective first fold line (18, 18) which extends parallel with the lower edge of the wall, and a respective second and a third fold line (20,21 and 22,23) which extends from a respective one of the two lower corners of the wall to a respective free edge (14,16) of the wall while intersecting the first fold line to form an oblique angle (v1) therewith, the second and the third fold lines forming an angle of about 45 DEG with a respective side edge extending from the same corner. The tray can be either folded along the first fold line to form rim sections (26-29) which when folded outwards lock the walls in a position in which folding along the second and the third fold lines is prevented, or can be folded along the second and the third fold line, so as to collapse the tray.

Description

1 79816

Folding trough

The invention relates to a collapsible high-walled trough made of a flat, rigid material blank having a rectangular base bounded by four bottom edges and four walls, each having a lower edge which coincides with a corresponding bottom edge on the other hand. two side edges, each of which coincides for a predetermined distance 10 with a corresponding side edge of a adjacent wall, and a free top edge, each of said first two opposite walls having a first grooving line extending between the two side edges of the wall and parallel to it; with a corresponding lower edge, and respective second and third grooving lines, each starting from a respective lower corner of the wall extending to the respective free edge of the wall, intersecting with the first grouting line at an oblique angle, the second and third grouting lines forming an angle of about 45 ° s. with a side edge starting from a corner, each of said first walls being foldable along a corresponding first creasing line to form an edge which, in the extended position, locks the wall in a position where folding along one second and third creasing lines is prevented, or foldable along the other and a crease line so that both said first walls can be folded along their lower edge outwards until they are flush with the bottom of the trough 30, and so that the other two walls can simultaneously be folded along their lower edge inwards towards the bottom of the trough.

Such collapsible trays are known, for example, from DE publication 1 199 178. This known tray 35 has several disadvantages. Although it comprises reu- 2 79816 parts in the form of reinforcements, its corners are quite weak. In addition, the corners are not tight. A further problem is that the tray cannot be stacked so that the trays settle inside each other.

It is therefore an object of the invention to provide a collapsible high-walled trough from which the above-mentioned disadvantages have been effectively removed.

This object is realized by a trough according to the invention, characterized in that the walls are connected to each other at each corner of the trough by means of a corner element comprising a pair of corner panels connected to each other by a centering line and a corner element having a pair of side panels a wall, wherein the corner panels of each corner element are connected to each other and securely attached to the surface of one adjacent wall to both reinforce and seal the corner, said lateral lines forming an angle slightly greater than 90 ° to said lower edge of the respective wall 20 so inclined outwards from said base.

Further developed forms of the invention appear from the dependent claims.

The trough according to the invention comprises reinforced corner elements which also make the trough tight. The walls of the trough are tilted slightly outwards so that the troughs can be stacked vertically inside each other. The trays can also be stacked in the folded position in the container, from which they can be removed one by one, so that as they pass through the slotted opening of the container they at the same time become upright.

The invention will be described in more detail below with reference to the accompanying drawing, which shows a preferred embodiment of the invention and in which: Figure 1 shows a trough according to the invention in an upright position; 3,79816 Fig. 2 shows the trough of Fig. 1 in an upright position and with the edges folded out; Fig. 3 shows the tray of Fig. 1 in a folded state; Fig. 4 shows a blank of material from which the trough is made; Figure 5 shows how the lid can be locked against the tray; and Figure 6 shows a trough container.

10 Tray, see Fig. 1, consists of a rectangular, preferably rectangular base 1 delimited by four bottom edges 2-5 and four walls 6-9, each of which has a lower edge coinciding with each respective bottom edge 2-5, on the other hand it has two side edges 10 and 11, 11 and 12, 12 and 13 et seq. 13 and 10, each of which along a predetermined distance (about 70-90% of the length of the side edge calculated from the lower corner of the wall) coincides with the corresponding side edge of the adjacent wall.

Those portions of the side edges 10-13 that do not coincide with each other are the side edges at the foldable edges, which are described in more detail below.

Walls 6-9 also have a free top edge 14-17.

Each wall 6-9 is in the shape of a parallel truncated triangle, with the bottom side of the triangle formed by the free edge 25, 15, 16 and 17 respectively. Thus, the walls of the trough are inclined slightly outwards so that several erected troughs can be nested in a stack.

Both opposite walls 6 and 8 have a first groove line 18 and 19, respectively, extending from the two side edges 10 and 11 and 19 of the wall 30, respectively. 12 and 13 and at the lower edge 2 and resp. With 4. The second and third creasing lines 20 and 21 and 22 and 23, respectively, extend from the two lower corners of the walls 6 and 8, each at their respective angle to the free edge 14 of the wall, respectively. 16 crossing the first extraction line 18 and resp. 19 4 79816 at an oblique angle v2 of about 45 ° if the walls of the trough do not tilt, and which in the embodiment shown in Fig. 1, in which the walls tilt, is more than 45 ° proportional to the angle of inclination of the walls. Each of the creasing lines 5-23 then becomes the first lower part 20a, 21a, 22a and resp. 23a, located at the extraction line 18 and resp. 19 below, and the second upper part 20b, 21b, 22b and 23b, located at the extraction line 18 and resp. 19 above.

Each crease line 20-23 forms an angle v2 of about 45 ° from the same angle to the side edge 10, 11, 12 and the like. 13 so that the trough can be folded along lines 20-23 under certain conditions, as will be seen in more detail below.

15 The other two walls 7 and 9 each have a crease line 24 and 25 extending from the two side edges 10 and 13 of the wall and 11 and 12 and the lower edge of the parallel wall 5 and resp. 3 at the same height from the bottom 1 of the trough as the recess lines 18 and 18 of the first walls 6 and 8, respectively. 19.

The trough shown in Figure 1 can be folded into the shape shown in Figure 3 so that the trough walls 7 and 9 are folded in towards the center of the trough, with the walls 6 and 8 folding along the crease lines 20-23 as shown in Figure 3.

If, on the other hand, the walls in the trough shown in Fig. 1 are folded outwards along the grooves 18, 19, 24 and 25 to form the folded-out side pieces in the form of edges 26-29, as shown in Fig. 2, the above-mentioned tops 20b, 21b, 22b and 23b in the creasing lines 20-23 of the respective lower parts 20a, 21a, 22a and resp. 23a, so that folding along the groove lines 20-23 is prevented, so that the erected trough acquires a very stable and clear shape.

Fig. 4 shows a cut, flat blank of 5,79816 plastic-treated paperboard or the like, which by folding and joining together can obtain the shape of the tray shown in Figs. 1-3. From each of the four northern corners of the trough, two additional extraction lines 30 a-b, 31 a-b, 5 32 a-b and resp. 33 a-b. When the corner parts of the trough are joined together, a similar procedure is followed for all four corners, so that it may be sufficient to describe here, for example, the joining of the lower right corner part, Fig. 4.

10 First, fold along lines 11, 31a and 31b, min. In the state shown in Fig. 4, the line 31a is located right in the middle of the lines 15 11 and 31b, so that these thus coincide and together form the side edge 11 shown in Figs. 1-3. The corner part is then fixed in its upright position by gluing, riveting or welding the plastic-treated surface layer of the trough.

Alternatively, the triangular portion between lines 31a and 31b may be removed so that only the portion between lines 11 and 31a needs to be secured against the wall 6.

As best seen in Figure 4, the lines 24 and 25 of the indentation-25 are interrupted by two points 34 and 35, respectively. 36 and 37, which are two endpoints in the U-shaped groove 38 and resp. 39, which extends into the respective edge 28 and resp. 29. When the edges 28 and 29 are folded out, both grooves 38 and 39 thus form 30 each of their locking tongues, as shown in Figures 2 and 5.

Two elongate, narrow locking slots in the form of recesses 40 and 41 are located at the edge 14 and respectively. 16, wherein the second longitudinal edge of the slits preferably coincides with the creasing line 18 and resp. With 19.

The described locking tongues and locking slots are intended to hold the lid 42 shown in more detail in Figure 5, which shows a trough having exactly the same shape as that shown in Figure 2. The lid 42, which consists of a plastic-treated, flat cardboard blank or the like, therefore has two locking strips 43 and 44 made, for example, by stamping on the edges of the lid, and two openings 45 and 46, e.g. 39 and with locking slots 40 and 41. The openings 45 and 46 may consist, on the one hand, of an elongate slot 10a and 46a for receiving the corresponding locking tongue of the trough, on the one hand, from two shorter slots 45b, c and respectively directed transversely to the elongate slot. 46 b, c, whereby two locking strips are formed between the slots 45 b and c 15 and, respectively, between the slots 46 b and c. Thus, the lid 42 can be placed against the edges of the lid, after which the lid is made to snap against the tray with light pressure.

Figure 6 shows a container 47 of a plurality of trays, in which the trays are packed folded into a stack from which the trays can be removed one at a time, forcing the tray upright while removing it from the container.

The container 47 has a bottom wall 48 and four vertical walls 49-52. The wall 49 has an evenly wide slit opening 53 along its vertical centerline 25, the width of which is substantially equal to the distance between the grooving lines 18 and 19 of the two walls 6 and 8. In the collapsed state, the trays are stacked on top of each other to form a stack 54, so that one of the walls 7 and 9 of the lower edges 3 and 5 are oriented 30 parallel to the slit opening 53.

On top of the stack 54 rests a counterweight in the form of a rectangular plate 55, which is e.g. metal or plastic. The two opposite edges of the plate 55 have a rectangular recess 56 and 57, which give the plate-35 le an H-shape, the web 58 of which separates said concavities 7 7981 6 56 and 57 from each other. The plate 55 is oriented so that its second recess, e.g. the recess 56, faces the slit opening 53. According to Fig. 6, the gripping hand or the like can grip the wall 7 of the uppermost trough and start the horizontal extraction of the trough 5 through the slit opening 53. Since the trough in the folded state in which it is stacked is too wide with respect to the slit opening 53, the edges of this guide the walls 6 and 8 of the trough upwards so that the trough can pass through the slit opening.

10 Once the extraction of the trough has been started, at the same time the rear edge of the web 58 of the counterweight plate engages the rear wall 9 of the trough and forces it upright, which further helps to erect the trough when it is pulled out of the container. As the free edges 14 and 16 of the trough rise to the stop, they at the same time raise the counterweight plate 55. Thus, in the extended pull-out of the trough, the trough slides under the plate 55. Once the rear wall 9 of the trough has risen, the engagement of the web 58 with the wall 9 opens, as this can now slide under the web 58. The detached web 58 20 of the wall 9 is facilitated by the fact that the wall has a foldable edge 29. As soon as the trough exits the slot opening 53, the plate 55 falls down again onto the tile stack 54.

The plate 55 may, of course, have a shape other than that shown. However, one condition is that its width is at least equal to the distance between the free edges 14 and 16 in the folded state of the trough, so that these edges can lift the slab when the trough is erected. In addition, the coupling member 57 need not be concave, but may alternatively be shaped e.g. into at least one ul-30 machine tongue or the like (not shown) capable of adhering to the rear wall 9 when the tray is pulled out through the opening 53. The choice of the coupling member of the plate 55 is determined by how much space is available between the free edges 15 and 17 of the trough in the folded space 35 of the trough. Of course, it is also possible to form the coupling member 7981 6 e into one or more tongues or the like placed in the concave 57, which thus start from the rear edge of the web 58. The coupling member can also be formed into one or more tongues or the like projecting from the underside of the plate 55. The täl-5 plate therefore does not need to have a recess 57.

According to an alternative embodiment, the lid can be fastened against the trough by welding or the like, in which case the locking tongues and locking slots of the trough as well as the locking strips and openings of the lid can be omitted.

Claims (4)

1. Foldable, high walls made of flat, rigid material with a square bottom (1) bounded by four bottom edges (2-5) and with four walls (6- 9), each having a lower edge, which coincides with each of said bottom edges, and two lateral edges (10-11,11-12,12-13 and 13-10, respectively), each of which along a predetermined distance coincides with respective side edges on adjacent wall, and partly an Upper Free Edge (14-17), each of the two first (6.8) opposing walls of said walls having a first crease line (18 and 19) extending between the walls of the wall. both side edges and parallel to the lower edge (2, 4) of the wall, and a respective second (20, 22) and a third (21, 23) crease line exiting from each of the lower bed corners of the wall to the free edge of the wall ( 14, 16) during crossing of the first fold line (18, 19. at oblique angle (v2)), the second and third fold lines forming about 4 5 ° angle with the side edge projecting from the same corner, whereby said first walls (6,8) each can either be folded (FIG. 2) along the respective first crease line (18, 19), forming a lattice (26-29), which in a folded position reads the wall in a position where folding along any of the second and third creases is prevented; or can be folded (Fig. 3) along the second and third creasing lines, so that both said first walls (6.8) can be folded along its lower edge (2,4) outwardly until they lie in the tab with the bottom of the funnel ( 1), and so that the two other walls (7,9) can be folded simultaneously along their lower edge (3,5) towards the bottom of the wood (1), characterized in that the walls (6-9) are in each corner of the wood connected to each other by a corner element comprising a pair of corner panels joined together by a central crease line (30a, 31a, 32a, 33a, Figure 4) and which corner element has a pair of lateral bending lines (10-13; 30b, 31b, 32b, 33b) which join respective corner panels at adjacent walls, each corner element's corner panel being bonded to each other. second, and is surely inclined to the surface of a neighboring wall for both reinforcing and tightening the corner, said lateral bending lines forming an angle somewhat greater than 90 ° with respect to the lower edge of the respective wall, so that the walls are inclined somewhat leaking from said bottom . 2. A sluice according to claim 1, characterized in that the two other walls (7,9) have a crease line (24, 25) extending between the bed side edges (11,12 and 13,10), respectively. parallel to the bottom edge (3 and 5, respectively) of the wall at the same height from the bottom (1) of the wood as the first creasing lines (18, 19) of the first walls (6, 8), respectively. Wood according to claim 2, characterized in that the crease lines 20 (24,25) of the other walls are interrupted between two points (34,35 and: 36,37), which constitute the end points of a U-shaped cut ( 38 and 39, respectively, which extend into the wall sash (28, 29), thereby forming a reading tongue, a lid (42) being affixed to the sashes (26-29), and provided with two openings ( 45.46) intended to read enclose was its said reading tongue. 4. A sluice according to claim 3, characterized in that the two first wall walls (26, 27) each have a recess (40 and 41), respectively, for reading envelopes each having a reading tab (42) arranged on the lid (42). 43, 44).