RU2689221C1 - Tray (versions) - Google Patents

Abstract

FIELD: textile and paper.SUBSTANCE: tray from cardboard sheet workpiece, which contains rectangular bottom, from which four baffle walls extend along folding lines. Two walls are located opposite each other and are bent from the bottom and with inclination towards each other. Two other side walls, bent from the bottom, are located perpendicular to the bottom and are made with a valve each made with length along side wall, smaller length of side wall, measured along the line of its bend from the bottom. Valve is bent relative to its side wall and is located on the inner side of the side wall with insertion of its tab into the slot in the bottom. Each of the first side walls is made with end valves of two parts, the first of which is connected along the bend line with the side wall, and the second one is connected along the bend line with the first part. Length of each first side wall along the line of its bend from the bottom is less than the length of the side of the bottom. First part of each valve of each side wall is bent from its side wall and is located with resting on bottom along line passing from line of bend of first part of end valve from its side wall to edge located on inner side of second side wall of its valve to provide inclination of first side walls towards each other. Second part of the end valve is bent from the first one and is located between the second side wall and its valve with insertion of the tab of the second part into the slot, into which the tab of the valve of the second side wall is introduced. On the side of the bend line of the first side wall from the bottom, its valve consisting of parts is made with a bevel along its length.EFFECT: group of inventions provides strength of tray and preservation of its spatial shape during stacking.2 cl, 5 dwg

Description

The invention relates to a tray-type package for storing and transporting products packed in bags, such as, for example, cottage cheese, etc., and which can take up the load of the stack.

The most convenient packaging for transporting such a product, such as packaged cottage cheese or cheese, is a tare type container. In such a tray, it is convenient to pack bags of cottage cheese on top, taking care of the safety of the product and the damage of the product (for example, due to too dense packing). The peculiarity of such a perishable product is that it is accumulated in production in storages with a reduced temperature and from such a room enters the packaging line in trays. In other words, the product is placed cooled to a temperature substantially lower than the ambient temperature in the packaging room. As an option, bags of cottage cheese can immediately after production (that is, after packaging the packages) fit into trays, which, after filling, enter the temporary storage room with lowered air temperature. Alternatively, bags of cottage cheese can immediately after production (that is, after packaging the packages) fit into trays, which, after filling, enter the body of the refrigerated carrier (as a temporary storage room with lowered air temperature) and are transported to the distribution network.

In any case, the temperature of products that are in trays made of corrugated cardboard is different from the temperature of the tray in which they fit. This leads to condensation, which is very undesirable for corrugated cardboard. When wet, corrugated cardboard loses its strength and shape, and the tray can be deformed only for the reason that its side wall or bottom is soaked. This may occur due to the removal of the tray from the refrigeration room to a medium with a higher temperature.

The profitability of transportation is directly dependent on the volume of use of the body of the refrigerator. In this regard, trays, as a rule, and in a warehouse in a cold room and in the back of the carrier are laid in columns or in a stack. But the carrying capacity of the trays in the stack of any construction depends on the ability of the trays to retain shape (which depends on the flatness of the side walls and the preservation of right angles in the corner areas of the joint walls). When wet, corrugated cardboard loses its carrying capacity, its walls are moved apart and deformed. This leads to the fact that the upper trays fall into the lower trays and crush the products.

So is known tray, made of cardboard sheet blanks, containing a rectangular bottom, from which four side walls extend along the inflection lines, each two of which, opposite to each other, are bent from the bottom and are inclined towards each other (RU 171097, B65D 5/30, published 19.05.2017).

In the well-known solution, an attempt is shown to eliminate the falling of the upper boxes to the lower ones due to the fact that all the walls of the tray are slightly inclined towards each other, forming a narrowing towards the top. The presence of such a narrowing leads to the fact that the upper perimeter of the open opening becomes smaller than the perimeter of the bottom of the upper stacked tray. Therefore, the top tray will not be able to fall into the bottom.

But such a shape of the tray does not have sufficient bearing capacity due to the high degree of probability that the side walls themselves will fold towards each other. Therefore, in this patent it is proposed to produce a tray with dimensions of not more than 400 × 400 × 150 mm, multiples of the dimensions of the stacking area on a typical euro-pallets, and at the same time from a five-layer corrugated cardboard. To enhance the strength of the tray, two opposite lying inclined side walls, among other things, are made double (in two five-syllable sheets). With this design, of course, the problem of not tracing each other is solved, but solved by significantly reducing the size of the tray and the increased consumption of thick corrugated cardboard. It can be seen that the tray with such weights and small internal volumes is unprofitable, roads and will significantly increase the cost of the product itself at the stage of its delivery to the distribution network.

Increasing the size of the well-known tray with all inclined side walls increases the consumption of five-layer cardboard even more, which will also affect the weight loading of the trays in the stack.

The main disadvantage of the structural strength of the known tray, on which its carrying capacity depends, is that all four side walls are inclined towards each other. It is clear that it was assumed that each wall in such an inclined position would be a support for two adjacent walls. But this position only works until all the walls are flat. When wetting at least one wall, the latter loses its strength in the local zone, and this leads to its deformation. As a result, the mode of support of the walls disappears, and the walls are folded, as the weight load on the walls is cracked into vertical and horizontal components, the last of which, having no resistance, creates a deformation of the folding walls.

The solution, in which the side walls of the tray are inclined towards each other to form a supporting perimeter for an upper tray with a bottom having dimensions greater than the size of the supporting perimeter of the side walls, can be considered as a new format for supporting the trays in a column or when stacked. But in the well-known patent, this solution is not constructively elaborated and cannot be applied to the overall trays of increased product occupancy.

The present invention is directed to the achievement of the technical result, which consists in increasing the strength of the tray with inclined side walls to preserve the spatial shape when laying in a column or stacking.

This technical result is achieved by the fact that in a tray made of cardboard sheet blank containing a rectangular bottom, from which four side walls extend along the bend lines, two of which, opposite to each other, are bent from the bottom and are inclined towards each other , two other side walls, bent from the bottom, are located perpendicular to the bottom surface and are made with a valve, each made with a length along the side wall of a smaller length of the side wall, measured along the line of its cross ba from the bottom, while the valve is bent relative to its side wall and is located on the inside of the side wall with the introduction of its tongue into the slot in the bottom, and each of the first side wall is made with end valves, each of which is made of two parts, the first of which connected along an inflection line with a side wall, and the second connected along an inflection line with the first part, and the length of each first side wall, measured along its inflection line from the bottom, is less than the length of the bottom side along which this side wall is connected to ohm, and the first part of each valve of each side wall is bent away from its side wall and is located with a bottom supported along the line extending from the inflection line of the first part of the end valve from its side wall to the edge of the second side wall of the valve located on the inside to provide tilt the first side walls meet each other, the second part of the end valve is bent from the first and is located between the second side wall and its valve with the introduction of the tongue of the second part into the slot in which the tongue is inserted and the second side wall, and on the side of the inflection line of the first side wall from the bottom of the valve, consisting of parts, is made with a bevel along its length.

This technical result is also achieved by the fact that in a tray made of cardboard sheet blank, containing a rectangular bottom, from which four side walls extend along the inflection lines, two of which, opposite to each other, are bent from the bottom and are inclined towards each other, the other two side walls, bent away from the bottom, are located perpendicular to the bottom surface, each of the first side wall is made with end valves, each of which is made of two parts, the first of which along the inflection line with a side wall, and the second is connected along the inflection line with the first part, and the length of each first side wall, measured along its inflection line from the bottom, is less than the length of the bottom side, along which this side wall is connected to the bottom, and the first a part of each valve of each side wall is bent away from its side wall and is located with a base resting on the bottom along the line passing from the inflection line of the first part of the end valve from its side wall to the longing located at a distance from the edge of the inflection line of the second station The second part of the end flap is bent away from the first and is positioned and fastened to the second wall of the second wall attached to the inner surface of the second valve, and the flap consisting of parts of the first side wall is bent from the bottom line of the first side wall. made with a bevel along its length.

These signs are essential and interrelated with the formation of a stable set of essential features, sufficient to obtain the desired technical result.

The present invention is illustrated with a specific example of execution, which, however, is not the only possible, but clearly demonstrates the possibility of achieving the desired technical result.

FIG. 1 - sheet blank tray according to the first embodiment;

FIG. 2 - assembled tray, made of sheet blank according to FIG. one;

FIG. 3 - sheet blank tray according to the second embodiment;

FIG. 4 - assembled tray, made of sheet blanks of FIG. 3;

FIG. 5 shows the position of the trays of FIG. 2 relative to each other in the column or when stacked.

According to the present invention, a tray-type container is considered, that is, a tray that is open at the top, the two walls of which are inclined towards each other to form a support perimeter along the upper line of the side walls. The sizes of the bottom of the tray exceed the area of the open opening of the tray. When laying one tray on another, the upper tray is placed on the perimeter of the side walls of the lower tray, which fits in the envelope of the bottom of the upper tray. Thus, in contrast to the standard layout of trays in a column or in a stack, the lower-positioned tray does not take the load around the bottom of the upper located tray, but in its zone, which is separated from the edge bending lines of the side walls from the bottom. At the same time, the other two walls retain their perpendicular position relative to the bottom surface. With this design, when deforming the sloping walls of the upper or lower tray when it is located in a column or stack, one tray does not wilt into the other because perpendicular walls hold the upper tray.

Considered a tray for products such as packaged cottage cheese or cheese curds is collected from a cardboard sheet blank. As a rule, in order to optimize the weight of the tray and its cost, three-layer cardboard is used for sheet stocking.

For the first exemplary version of the tray (Fig. 1 and 2), the blank (Fig. 1) contains a rectangular bottom 1, from which four side walls 2 and 3 extend along the inflection lines (pairwise opposite each other). In terms of the bottom, it can be square, but it can be rectangular in shape with long and shorter sides. A feature of the tray assembly from such a blank is that the two walls in the assembled tray will be located perpendicular to the bottom surface, and the other two opposite each other will be bent away from the bottom and inclined towards each other.

Two side walls 2, bent from the bottom 1, when bent from the bottom along the inflection lines, are arranged perpendicular to the bottom surface 1. Each of these side walls is made with valve 4 in the form of wall extension along its height, which can be bent relative to the wall (the bend is double inflection lines). This valve is centrally located relative to the side wall 2 and is made with a length along the side wall 2 of a smaller length of the side wall 2, measured along its bending line 5 from the bottom 1. When assembling the side wall 2, valve 4 is bent relative to its side wall and positioned on the inner side wall 2 with the introduction of his tongue 6 in the slot 7 in the bottom. Slot 7 is made in the bottom wall 1 side by side and along the inflection line 5. Thus, a side wall 2 which is double in thickness is secured from opening of the valve 4 in the bottom slot 1. In this position, the side wall 2 is perpendicular to the bottom of the tray and is a force element tray. The fastening of this wall with the tongue in the bottom ensures its non-disclosure (Fig. 2).

The side wall 2 is made on the end sections located on the sides of the valve 4, with protrusions 8 (one at each edge). After the bend of the valve 4 and its location along the inner wall surface, these protrusions remain open in the form of a continuation of the side wall. And on the bottom of the fold line 5, cuts are made (through holes) located opposite the projections 8. When the wall 2 bends from the bottom, in the zone of the line of inflection 5, windows are used on the outer side of the side wall, used to position the projections of the bottom tray. When stacked in a column, each next tray is placed on the already laid tray with placement of protrusions of the lower located tray in its windows. This ensures a clear position of each next stacked tray and ensures the non-dissipation of the column (Fig. 5). The exception to the displacement of the trays in the column (or in the stack) is ensured by the fact that each protrusion 8 is located in the plane of the outer surface of the side wall of the upper arranged tray and with its lateral edges abuts against the walls of the window.

Each other side wall 3 is made with end valves, which are a continuation of this wall along its length. Each of these end flaps is made of two parts 9 and 10, the first 9 of which are connected along the bend line 11 with the side wall 3, and the second 10 are connected along the bend line 12 with the first part 9. A special feature of this side wall 3, which is in the tray will be located obliquely, is that its length, measured along the line of its inflection 13 from the bottom, is less than the length of the bottom side, along which this side wall is connected with the bottom. Therefore, when this wall is bent from the bottom, the corner parts of the bottom remain open.

The first part 9 of each valve of each side wall 3 is bent away from its side wall and is located at the bottom with a base 14 extending from the inflection line 11 of the first part of the end valve from its side wall to the edge of the second side wall 2 of the valve located on the inside. This allows you to position the wall 3 obliquely with the inclination of the side walls 3 towards each other.

The second part 10 of the end valve is bent away from the first 9 and is located between the side wall 2 and its valve 4 with the introduction of the tongue 14 of the second part 10 into the slot 7 into which the tongue 6 of the valve 4 of the side wall 2 is inserted.

The same feature of the side wall 3 is that on the side of the inflection line from the bottom of the valve, consisting of parts 9 and 10, is made with a bevel along its length. It is the presence of such a bevel, provided that the valve of this wall should rest on the bottom, and ensures the inclination of the side wall.

In the assembled state, the tray according to the first embodiment (Fig. 2) has two opposite side walls 2 of triple thickness (due to the insertion of valve part 10 of the other side wall between the wall and its valve), which are perpendicular to the bottom, and two located opposite to each other side walls 3, made with bearing on the first side walls 2 due to the fact that parts 10 of its valves are inserted and clamped between parts of side wall 2. Thus, side wall 2 is the support of the reactive moment for side walls 3. When shnem pressure on the surface of the inclined wall 3 takes place its bending (punching), but due to the fact that this wall is clamped at both ends and has an edge support (such as ribs), then this deformation is temporary in nature and under the action of paperboard elastic forces neutralized.

In the assembled state, along the upper contour of the tray, a complex-shaped support contour is formed with dimensions smaller than the dimensions of the bottom of the tray. Thus, the upper stacking tray cannot fall into the lower tray because it has separated lines of support: two lines created by the upper contours of the side walls 2, two lines created by the upper contours of the side walls 3 and which do not have a short circuit on the first lines, and four short lines of support created by the parts 9 of the valves of the side walls 3 and which are angled to the walls 2 and 3. When breaking or deforming (for example, getting wet) of one inclined wall of the lower tray, the upper tray will rest on the rest inii reference circuit. Failure of the upper tray due to the fact that the contour of the bearing has a broken structure of individual lines, some of which have no closure at the corners of the joints of the walls.

The formation of the support sections, made by the edges of the valve part 9 of the side walls 3 and not located along the contour of the bottom boundaries, but past its corner zones, significantly increases the load capacity of the tray.

FIG. 3 and 4 shows a second example of the tray, which in principle repeats the construction of the first variant with some exceptions. This exception is:

- the absence of the side wall 2 of the valve 4;

- in the modified scheme of fastening the second part 10 of the valve of the side wall 3 to the side wall 2.

- part 10 of the valve of the side wall 3 does not have a tongue 14.

Two side walls 2, bent from the bottom 1, with the limb from the bottom along the lines of inflection are located perpendicular to the surface of the bottom 1 (Fig. 3 and 4). The wall is a single layer. The side wall 2 is made on the end sections with protrusions 8 (one at each edge). After the bending of the wall, these protrusions remain open in the form of a continuation of the side wall. And at the bottom of the inflection line 5, as in the first embodiment, cuts are made (through holes) located opposite the protrusions 8. When the wall 2 bends from the bottom, in the zone of the inflection line 5, windows are formed on the outer side of the side wall. positioning of the protrusions of the lower disposable tray.

The second part 9 of the end flap of the side wall 3 is bent away from the first 10 and is located pressed to the inner surface of the side wall 2 and fastened with it (using brackets or adhesive method). Thus, the side wall 2 is obtained two-layer assembly with part 10 of the valve.

Otherwise, this example repeats the construction of the example of FIG. 2. The strength and carrying capacity of such a tray is somewhat lower than that of the tray according to the first performance example, but it remains sufficient for a number of products of invested weight.

To ensure the air exchange of the internal volume of the trays, loaded with the product, with the external environment, in the side walls 2 and 3 are made of ventilation holes 15.

The present invention is industrially applicable and can be manufactured using known carton packaging techniques. The peculiarity of this package is that a new type of support was created along its upper edge contour for stacking other trays in the column or when stacked. This new contour of the support ensures that trays are kept in the column even if one or two walls or partially the bottom of the tray is deformed or wet. This prevents the inclined side wall from falling down inside the tray or folding its walls.

Claims (2)

1. A tray made of a cardboard sheet blank containing a rectangular bottom, from which four side walls extend along the inflection lines, two of which, opposite to each other, are bent from the bottom and are inclined towards each other, characterized in that two other side walls, bent from the bottom, are located perpendicular to the bottom surface and are made with a valve each, made with a length along the side wall, shorter than the length of the side wall, measured along the line of its bend from the bottom, while the valve is bend relative to its side wall and is located on the inside of the side wall with the introduction of its tongue into the slot in the bottom, and each of the first side walls is made with end valves, each of which is made of two parts, the first of which is connected along a bend line with the side wall and the second is connected along the inflection line with the first part, and the length of each first side wall, measured along the line of its inflection from the bottom, is less than the length of the bottom side, along which this side wall is connected with the bottom, and the first part of each class The apana of each side wall is bent away from its side wall and is located with the bottom resting on the bottom line from the inflection line of the first part of the end valve from its side wall to the edge of the second side wall of the valve located on the inner side to ensure the first side walls tilt towards each other , the second part of the end valve is bent from the first and is located between the second side wall and its valve with the introduction of the tongue of the second part into the slot, into which the tongue of the second side wall valve is inserted, and side of the line of inflection of the first side wall from the bottom of its valve, consisting of parts, is made with a bevel along its length. 2. A tray made of a cardboard sheet blank containing a rectangular bottom, from which four side walls extend along the bend lines, two of which, opposite to each other, are bent from the bottom and are inclined towards each other, characterized in that two other side walls, bent from the bottom, are located perpendicular to the bottom surface, each of the first side walls is made with end valves, each of which is made of two parts, the first of which is connected along a bend line with the side and the second is connected along the inflection line with the first part, and the length of each first side wall, measured along the line of its inflection from the bottom, is less than the length of the bottom side, along which this side wall is connected to the bottom, and the first part of each valve of each side wall bent away from its side wall and positioned at the bottom with a line extending from the inflection line of the first part of the end valve from its side wall to a point located at a distance from the edge of the inflection line of the second wall from the bottom to ensure a slope on the first side walls towards each other, the second part of the end valve is bent away from the first one and is located and fastened to the second surface of the second wall attached to it, and on the side of the inflection line of the first side wall from the bottom its valve consisting of parts is made with a bevel length.

Images