RU2090476C1 - Foldable many-sided tray - Google Patents

Abstract

FIELD: storage and transportation of fruit and vegetables; corrugated cardboard cartons. SUBSTANCE: foldable many-sided tray assembled of multiangular blank has multiangular bottom, double side walls and radial double layer stiffening ribs of trapezoidal shape formed between each pair of adjacent side walls. Corner arches are formed between two layers of stiffening ribs, thus forming four-layer support units together with stiffening ribs. EFFECT: enlarged operating capabilities. 3 cl, 6 dwg

Description

 The invention relates to containers of sheet material, for example, corrugated cardboard, intended for transportation and storage of products, in particular fruit and vegetable.

 Known designs of containers, the cross section of which has a multifaceted shape, giving it rigidity and its increased ability to stack. For example, an octagonal drum-shaped container is known (Packager Handbook. Converta. Finland). Its side walls are formed from a rectangular blank with eight bending lines sewn or glued along the side seam, and the bottom and cover are formed from identical octagonal blanks by stitching or gluing.

 The disadvantage of the design is that it is assembled from several (three) blanks, as well as the need for stitching or gluing. The use of several blanks in the design leads to an increase in the number of technological operations in the manufacture, which complicates and increases the cost of production. The need for gluing or stitching makes it difficult to assemble containers at the place of consumption.

 The construction of a multi-faceted corrugated cardboard tray is also known (Prospect of Martin "Equipment for corrugated cardboard", 1991). The tray has a folding structure and is assembled from one preform of a polygonal (octagonal) shape by sequentially bending to the vertical position of the sections of the preform forming the side walls of the tray. At the same time, half of the walls are single and have flap valves on the sides that are directed along adjacent side walls, and the other half, forming these adjacent walls, are double and go around the valves, fixing the tray in the assembled position.

 The design disadvantage is the small area of the supporting surfaces for installing the subsequent tray when stacking, which makes it difficult to install trays in the stack, because requires great installation accuracy, and this is difficult to do, especially when installing trays in the upper rows of the stack. With inaccurate installation, the tray may fall into the downstream, which will cause creasing and damage to the product. In order to avoid even slight mutual shift of the trays in the stack, additional fixation of the stack is required. In addition, this tray is not rigid enough, because when filling it with products, there may be a violation of the fixation of the valves relative to the envelopes of their side walls, as a result of which the vertical position of the walls is violated and their resistance to vertical loads in the stack is reduced.

 Known folding packaging packaging made of cardboard, the closest in design to the claimed tray and selected as a prototype (Application Germany N OS 3114564, CL B 65 D 5/36, 1981). This multifaceted cross-sectional container is formed from a preform of a polygonal shape, while angular arches are formed that are between adjacent rectangular surfaces of the side walls. The corner arches are in the form of rectangular triangles, the smaller legs of which are located in the upper plane of the container, and the vertices opposite them are located at the bottom. Fixing containers in the assembled position is carried out using a framing cloth (tape).

 The disadvantage of the design is the low compressive strength during shatebelirovannoe, determined by the fact that the side walls are made single. In addition, due to the cantilever design of the corner vaults, under the influence of vertical loads, forces arise that tend to tear off the corner arches from the side walls, which also limits the ability of the container to absorb loads in the stack.

 The aim of the invention is to increase the rigidity and strength of the container when exposed to vertical loads of the stack.

 This goal is achieved in that the multi-faceted tray with double side walls has radially spaced stiffeners in the form of trapezoids extending from the connection point of each pair of adjacent side walls, the lower bases of which rest on the bottom of the tray, and the upper ones form additional supporting surfaces in the upper plane of the tray.

 In FIG. 1 shows a scan of a tray; in FIG. 2 and 3 show the assembly order of the tray and the formation of stiffeners; in FIG. 4 tray assembled with an internal arrangement of stiffeners; in FIG. 5 design of stiffeners; in FIG. 6 tray assembled with an external arrangement of stiffeners.

 Folding multifaceted tray contains a bottom 1 of a polygonal shape, double side walls 2 7. of rectangular shape, as well as radially arranged stiffeners 8 18. formed during assembly of the tray due to folding surfaces 14, 14 ', 15, 15', 16, 16 'between each a pair of adjacent side walls. Outside around the side walls of the tray is covered by a tape 23, holding it in the assembled position. Stiffening ribs, depending on the method of forming the side walls, can be directed both inside the tray and out. The stiffeners directed into the tray at the same time can serve as partitions for separating the packaged products, and, if necessary, the stiffeners can close in the center of the tray, dividing its internal cavity into sections, the number of which corresponds to the number of faces. Stiffening ribs serve as additional supports for the higher tray when stacking and eliminate the likelihood of pressure from the upper tray on the products in the lower one, which simplifies the working conditions when stacking.

 The tray is assembled from one solid preform of a polygonal shape with fold lines applied to it. When assembling the surface of the workpiece 14, 15 and 14 ', 15' after bending along line 19, double stiffeners of trapezoidal shape are formed, and surfaces 16 and 16 'connected to surfaces 15 and 15' along the bending lines 18 after they are combined when bent along the bending lines 20 form angular arches, entering inside the trapezoidal stiffeners and additionally reinforcing them.

 In the case of the location of the surfaces 2 ', 3', 4 ', 5', 6 ', 7'. forming the second layer of the side walls, from the inside of the tray, the ribs are directed inward to the center of the tray; if these surfaces are located on the outside of the tray, then the stiffeners are directed outward.

 Stiffening ribs, supported by their bases on the bottom, significantly increase the rigidity of the tray and its ability to absorb vertical loads during stacking, which increases the safety of products and allows you to increase the height of the stack during storage and transportation, and therefore make better use of the height of warehouses and vehicles.

Claims (3)

 1. Folding multifaceted tray formed from a preform of a polygonal shape, containing a polygonal bottom and double side walls, characterized in that, in order to increase strength and stiffness, when assembling between each pair of adjacent side walls, two-layer stiffeners radially located and directed inside the tray are formed trapezoidal shape, the lower bases of which rest on the bottom, and the upper ones form the supporting surfaces in the upper plane of the tray, while angular arches are formed inside the ribs, forming a joint but with them are rigid four-layer support nodes.  2. The tray according to claim 1, characterized in that the stiffeners close in the center of the tray, forming closed cells.  3. The tray according to claim 1, characterized in that the radially arranged stiffeners are directed outward.

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