RU2706102C1 - Folding box - Google Patents

Abstract

FIELD: packaging industry.

SUBSTANCE: invention relates to containers. Folding box is made of cardboard by bending of parts of sheet billet, including serially connected through bend lines side walls, bending each relatively adjacent wall to form open box, said side walls have, on one edge, valves that are bent towards each other to form the bottom of said box. Valves connected to one oppositely arranged sidewalls are made at one of their edges with an inflection line extending from the angle of the valve located on the line of its bend from the side wall to the middle zone of the edging edge of the valve passing along the line of bending of this valve from the side wall, and with projection of hook-like shape in plan on said edge on other side in relation to bend line edges of this valve. Valves connected to the other two oppositely arranged side walls are made each with an elongated triangular hole, one side of which is rectilinear and is inclined in direction from valve bending line from side wall to its edging edge, and other side, spaced from the first one, is arched convex and is connected with the third side located across rectilinear side of the through hole. At the same time, the rectilinear side of the through hole at its third side is made with continuation in the form of a linear section of the valve material.

EFFECT: disclosed is folding box.

1 cl, 3 dwg

Description

The invention relates to containers and, in particular, considers the design of a box made of cardboard, a feature of which is the possibility of folding it for ease of transportation and delivery to the packaging line in packs. Such a box is preferably used on automatic packaging lines of chips, to which a box with a pre-assembled and unopened bottom is fed in a folded state for independent opening when lifted by the manipulator.

For manual or automated packaging lines, boxes are delivered folded and in bundles. As a rule, the boxes are folded along the line of kinks of the side walls, leaving the bottom and cover valves in a freely assembled position. The operator, taking the folded box, collects the bottom from the lower valves, fastens these valves and puts the box on the line for laying products in it. But, it is clear that the assembly of the bottom of the box takes some time, and the quality of the assembly of the bottom depends on the experience and skill of the operator. To exclude the influence of the human factor on the assembly quality of the bottom of the box, boxes with an already assembled bottom are used, from which side walls extend, which have additional inflection lines that allow these interconnected side walls to fold and lay them on the bottom. When such a folded box arrives at the packaging post, the operator opens the walls and restores their position relative to the bottom of the box (RU 18696, 31772).

But the practice of using such folding boxes has shown that folding is only possible for those boxes that have small side walls, which immediately limited the scope of such folding boxes.

The practice of using four-valve boxes shows that their profitability in terms of packaging significantly increases when the height of the side walls begins to exceed a smaller bottom width. Therefore, there was a need for the creation of folding on the kink lines of the side walls of the four-valve-type packaging boxes, in which the bottom is already assembled or can be assembled very quickly at the place of application of the box.

For example, a folding box made of corrugated cardboard is known. A folding box made of cardboard by the method of bending parts of a sheet stock, including side walls connected in series through the bending lines, bending each relatively adjacent wall to form an open box, said side walls have one edge valves, bending towards each other to form the bottom of this duct, while the valves associated with the side walls are configured to form a bottom (RU 2323863, B65D 5/36, B65D 5/42, publ. 05/10/2008).

This decision was made as a prototype for the claimed object.

A feature of folding boxes with a pre-assembled bottom is that when folding the side walls due to their rapprochement towards each other, the valves forming the assembled bottom are displaced in the contact plane relative to each other. This feature does not allow the bottom valve to be rigidly fastened to each other, for example, by glue. In the known solution, two valves that are bent first from the side walls and are stacked towards each other are not connected with other valves and therefore, when folding the boxes, they are pressed against the side walls and occupy a position pressed against the side walls. And the valves, which are stacked on top of the first, when folding are displaced relative to each other. But these second valves are interconnected by a lock connection. In particular, in the known solution, this locking connection is made in the form of two interlocking protrusions. At the same time, this locking joint works well when the walls of all valves are pressed against each other due to the elasticity of the corrugated cardboard (after bending the valves, elasticity remains in the places of the bend, which attempts to return the valve to its original position, that is, to unbend them). Due to this residual elasticity of the corrugated board, the bottom is held by a lock connection without opening the valves. But as soon as the box with the bottom assembled is folded, the places of kinks get severe deformation (the kink of the valves is not 90 °, but 180 °). At the same time, the valves with locking elements move apart. And at the time of assembly of the valve with the locking elements must come together, maintaining the mutual position of the overlapping valves. But due to the loss of elasticity, this does not always work out and the operator must manually set the valves so as to restore the integrity of the locking joint. This creates inconvenience in use, since each box that has been opened has to be checked. For manual assembly and packaging lines, this defect can be corrected by the operator, but on the lines of automatic opening of boxes and when they are automatically fed in the open state to the packaging, this defect leads to marriage.

The present invention is aimed at achieving a technical result, which consists in ensuring the indissolubility of the assembled bottom of folding boxes when they are opened.

The specified technical result is achieved in that in a folding box made of cardboard by the method of bending parts of the sheet blank, which includes side walls sequentially connected through the bending lines, each bending relatively relatively adjacent wall to form an open box, these side walls have one edge of the valve bent towards each other to form the bottom of this duct, valves associated with one two oppositely spaced side walls are made each with the bottom of its edge with a bend line extending from the angle of the valve located on the bend line from the side wall to the middle zone of the edge of the valve passing along the bend line of the valve from the side wall and with a hook-shaped protrusion in plan on the specified edge to the other the side with respect to the inflection line of the edge of this valve, and the valves associated with the other two oppositely spaced side walls are each made with an elongated triangular-shaped hole, one side of which is made rectilinear and is located obliquely from the inflection line of the valve from the side wall to its edge edge, and the other side spaced from the first is arched convexly connected to a third side located transversely to the straight side of the through hole, while the straight side of the through hole is made at its third side made with a continuation in the form of a linear section of the valve material.

These features are significant and are interconnected with the formation of a stable set of essential features sufficient to obtain the desired technical result.

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

In FIG. 1 - sheet blank folding box;

FIG. 2 is a view of the bottom assembly from the outside of the box;

FIG. 3 is a view of the bottom assembly from the inside of the box.

According to the present invention, the design of the developed original cardboard box (for example, corrugated cardboard) is considered, the bottom of which is assembled in a short period of time and has the ability not to open when the box is folded along the side walls and when it is opened. Moreover, such a box can be used when laying out on the trading floor as a demonstration box by tearing off a part of the side wall of the box to demonstrate the packaged goods in the open state.

Preferably., Such a folding box is designed for use on automatic packaging lines, where folding boxes are fed in packs and the manipulator is moved one at a time to the conveyor line. At the same time, at the time of capture and movement on the line, the box opens and the bottom fits onto the line.

Packaging for products, for example, for packaging chips, is a cardboard box open at the top or a four-valve box, which has the shape of a parallelepiped and is formed by bending its parts along fold lines from a sheet blank (Fig. 1).

The sheet blank has successively located and interconnected along the inflection lines of the wall, located in the following sequence: side wall 1, end wall 2, side wall 3 and end wall 4, which ends with an additional valve 5 used to glue the side walls during assembly. This additional valve 5 may be located at the edge of the last side wall 4, as shown in FIG. 1, and at the first side wall. To form the bottom, the side walls 1 and 3 are made with valves 6, bending from the walls towards each other, and the end walls 2 and 4 are made with valves 7, bending from the walls towards each other. The bottom is formed by bending from the side walls of the valves 6 and 7 towards each other.

The concepts of “side” and “end” walls of the box are used to understand the principle of bottom formation. Such terms can be used for a box of a rectangular shape in plan, when one side wall is longer than the other walls. In principle, the box can have a square shape in plan and in this case the terms “side” and “end” walls for the box become conditional in view of the equivalence in size of all the walls.

The design of the top of the box, which can be composed of four valves, is not considered in this utility model. Depending on the shape of these valves, it is possible to make the top by first laying the first two valves opposite to each other on opposite walls, and then the valves of the other two walls are placed on top of them and these copans are connected with adhesive tape along their contact line. It is possible to execute the bottom by first laying the first two valves opposite to each other on opposite walls, and then on top of them are the valves of two other walls that have a curved edge, due to which one of these valves engages with the other. Or there may not be a top at all, since the box can be made of a tray type, that is, open on top or closed by a separate lid. In FIG. 1 sheet blank is shown for a box with upper flaps forming a bend method.

Thus, a box with side walls and a bottom is obtained. In this box, the bottom is made by quick assembly technology. The execution of the bottom is new for folding boxes, in which folding is done along the side walls. That is, two adjacent side walls are pressed against the other two adjacent walls. At the same time, once assembled from valves 6 and 7, the bottom is no longer disassembled and remains assembled in the folded position of the side walls, located between these walls inside them. When the box is opened, that is, when the side walls are pushed apart, the geometric shape of the box is restored and the bottom is restored. This is especially important if the folding box is used on automatic packaging lines. The manipulator suckers pressed against the surface of the side wall and raises the folded box, which when lifted straightens and restores the bottom. Then, by turning the manipulator, the box bottom is laid on the conveyor belt of the line and goes under manual or automatic loading of the product.

The valve 7, associated with one two opposite side walls 2 and 4, is made each from one of its edges with a bend line 8, going from the corner of the valve located on the line of its bend with the side wall, to the middle zone of the edge edge 9 of the valve running along the inflection lines of this valve with the side wall 2 or 4. Also, these valves 7 are each made on the other edge with a hook-shaped protrusion 10 in plan, which is made on the specified edge 9 on the other side with respect to the inflection line 8 of the edge of this valve. Moreover, from the side of the protrusion 10, the end edge 11 of the valve 7 is made beveled or inclined with respect to the inflection line of this valve with a side wall to form a triangular shape in plan of this part of the valve. It turns out that in terms of valve 7 has the shape of a rectangular trapezoid.

Valve 6, associated with the other two oppositely arranged side walls 1 and 3, is each made with an elongated triangular-shaped hole 12, one side 13 of which is made rectilinear and is inclined in the direction from the inflection line of the valve from the side wall to its edge edge 14. The other side 15 through hole 12, spaced from the first 13, is arched convex and connected with a third side 16 located transversely to the rectilinear side 13 of the through hole. Thus, in terms of a through hole, it looks like a triangle, in which one side is straight and the other is slightly convex (curved arcuate).

A feature of the through hole 12 is that the straight side 13 of the through hole at its third side 16 is made with a continuation 17 in the form of a linear section of the valve material.

Organized the bottom of the box as follows.

The operator collects the open box by bending the side walls 1-4 and fastens them using an additional valve 5 (gluing or using staples). Get an open box with valves 6 and 7 for the formation of the bottom. Then the operator bends the valves 6 towards each other (the valves can adjoin the edges to each other or their facing towards each other edges can be spaced apart, as shown in Fig. 2 and 3, this option is preferred). After that, the operator first bends one valve 7 relative to its side wall and inserts the end of the valve, which is made with the protrusion 10, into the through hole 12 and puts the valve 7 on the surface of the valve 6 lying underneath. The same actions are carried out with the second valve 7. B As a result, they get the assembled bottom of the box. In the assembled state, the bottoms of the valves 6 and 7 (due to the forces of residual elasticity of the material) are trying to turn towards the side walls. Below lying valves 6 press valve 7 towards their opening. But under this pressure, the protrusions 10 of the valves 7 are displaced in the through hole 12 and fall into the extensions 17 in the form of a linear section of the material and the hook-like part, where they hook on the wall of the valve 6. The need to make the through hole in the form of a wide slit of a triangular shape in plan is necessary in connection with the fact that the edge of the valve 7, when pressed in the direction of the opening of the valves, moves along an arched path, which is geometrically difficult to describe. Therefore, the area and shape of the through hole represent a zone of possible displacements of the edge of the valve 7.

When folding the box due to the approach of the side walls of the valve 6 from the position of the assembled bottom, they are additionally bent by 90 ° and laid along the side walls 1 and 3, and the valve 7 begins to come out of the through hole, leaving a hook-shaped part of the protrusion in it. Valves 7 are displaced, and some of them are crushed along the bend line 8. Only in this case, valves 7, without breaking the connection with valves 6, remain between the walls of the box. When straightening, the valve boxes return to the bottom position due to the fact that the valve 7, in communication with the valves 6 due to the capture of the protrusion 10, pulls the valve 6. A part of the valve 7 with the protrusion is recessed in the through hole and continues to be hooked onto the wall of the valve 6.

Thus, the straightening of the side walls of the box leads to a straightening of the bottom. Such a box is very technological, easy to manufacture and eliminates manual labor on automated packaging lines. A feature of the invention is that it ensures the unbreakability of the assembled bottom of the folding boxes when they are opened.

Claims (1)

A folding box made of cardboard by the method of bending parts of a sheet blank, which includes side walls sequentially connected through the bending lines, bending each relative to an adjacent wall to form an open box, these side walls have flaps from one edge, bending towards each other to form a bottom of this box, characterized in that the valves associated with one two oppositely spaced side walls are made each from one of its edges with a line ba, going from the angle of the valve located on the line of its inflection from the side wall to the middle zone of the edge edge of the valve, passing along the inflection line of this valve from the side wall, and with a hook-shaped protrusion in plan on the indicated edge on the other side with respect to the line the inflection of the edge of this valve, and the valves associated with the other two oppositely positioned side walls, each made with an elongated triangular-shaped hole, one side of which is made straight and is located obliquely in the direction and from the line of inflection of the valve from the side wall to its edge edge, and the other side spaced from the first is arched convex and connected to a third side located transversely to the rectilinear side of the through hole, while the straight side of the through hole at its third side is made with continued as a linear section of the valve material.

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