FR2802179A1 - Cardboard blank with tear-off wall for packaging crate has flaps forming bottom, top and side walls joined by pre-cut junction lines, and tear-off portions join side walls to bottom - Google Patents

Abstract

The packaging crate is made from a cardboard blank comprising a first vertical wall (2) connected by pre-cut junction lines (6-9) to the bottom, top and adjacent side walls. The vertical wall opposite the first wall is fixed to the bottom wall by a tear-off portion (33). The side walls adjacent to the first wall are fixed to the bottom wall by pre-cut tear-off portions (28,29). The crate walls are formed by flaps (2-5).

Description

The present invention relates to a blank made of cardboard or corrugated cardboard material for the manufacture of a packing case, the carton or the corrugated board. type comprising at least four rectangular flaps said rectangular flaps having a first flap for forming a first side wall the body, connected by a first connecting line to a second flap for <B> to </ B> form the bottom of the box, and respectively by second, third and fourth lines joining <B> to </ B> adjacent panels formed by one or more flaps and at least a third flap , and a fourth rectangular flap to <B> to </ B> form a second side wall of the body opposite <B> to </ B> the first wall.

It also relates to a packaging box formed from a single blank comprising a first vertical wall connected by connecting lines to the bottom and to the adjacent side walls of the box.

The invention finds a particularly important, although not exclusive, application in the field of packaging for rigid or semi-rigid products such as chocolate chips or chip packets, making it easy to present the products <B> to </ B> the outside of their transport packaging in an immediate, clean and attractive way, especially on the shelves of store shelves <B> to </ B> large area.

already known <B> already </ B> (EP <B> 0 637 </ B> 548) packing cases allowing a quick disconnection of the upper part of the body compared to <B> to </ B> part lower forming tray, allowing rapid presentation of the contents of the package in said tray.

Such a box is, however, obtained from two different blanks glued one to the other and has the disadvantage of not allowing easy, quick and easy removal. totally all the products of the packaging, to be presented aligned on a shelf.

The present invention aims to provide a blank and a box that respond better than those previously known to the requirements of the practice, in particular in that it allows the complete removal of the package by a few simple movements allowing a impeccable presentation on the shelves in the shops.

From <B> plus, </ B> the invention allows an automatic assembly <B> to </ B> high rate (superior <B> to </ B> twenty cases / min), the cases obtained having a large strength and being otherwise easily stackable on pallets.

For this purpose, the present invention proposes in particular a blank made of corrugated cardboard or corrugated board material of the type described above, for the manufacture of a packing case, characterized in that the second flap comprises two side flaps and an end flap, in that the first, second, third and fourth connecting lines are pre-cut and in that the fourth flap or the end flap of the second flap comprise at least one pre-cut frangible portion.

By junction line pre-cut between two panels, a panel being formed by a flap or one or more flaps, means a junction line consisting of a few attachment points attachment parts between the two panels, which makes the two panels easily separable from each other, by tearing the junction line by combining a perpendicular traction <B> to </ B> the line and a gradual detachment of the attachment points one after the other.

The pre-cut junction lines are thus arranged to have a good resistance in the direction of the line, and / or as a tear initiation has not been started.

Advantageously, a hard point makes it possible to avoid a beginning of tearing on either side of the line and / or in the middle.

Similarly, per pre-cut frangible portion is meant a frangible portion which holds only by a few points or attachment parts with rest of the blank and which is therefore easily detached from the blank, by traction perpendicular to the plane of the blank (a few Newtons, for example <B> 5 to 10 </ B> Thus, the pre-cut portion and / or pre-cut lines are arranged to have good resistance in the vertical direction as the forces are exerted essentially in the plane of the walls. especially sufficient to allow the transport of products even if the packaging is grasped by the upper part.

In advantageous embodiments, one of the following provisions is also used <B> to </ B> and / or <B> to </ B>: </ B> <B The second and third connecting lines are fold lines connecting the first flap <B> to </ B> adjacent flaps intended to <B> to </ B> at least partially form side walls of the crate and the fourth junction line is a line connecting the first flap <B> to </ B> a third flap intended to <B> to </ B> form the top of the case <B>; </ B> < B> - </ B> the second and third connecting lines are fold lines connecting the first flap <B> to </ B> two adjacent flaps intended to <B> to </ B> form the walls of the crate and the fourth line of junction is a line connecting the first flap <B> to </ B> an upper flap intended to <B> to </ B> form at least partly the top of the case <B>; </ B> <B> - </ B> the side flaps of the second flap are each provided respectively with a portion fra ngible pre-cut, for example substantially rectangular <B>; <B> <I> - </ I> </ B> </ B> </ B> </ B> </ B> </ B> </ b> </ b> </ b> </ b> </ b> </ b> The pre-cut frangible portions of the two side flaps of the second flap are cut in an open line with one side. fully flared outward of said flaps <B>; </ B> <B> - </ B> the pre-cut frangible portions of the two side flaps of the second flap are located on the side of the first flap <B>; </ B> <B> - </ B> each of the side flaps of the second flap includes at least one additional cut-away frangible portion; <B> - </ B> the fourth junction line is hat-shaped < B> at </ B> on the fold line between the first and the adjacent panel <B>; </ B> <B> - </ B> at least one of the pre-cut frangible portion of the fourth component and the fourth pre-cut junction line, is respectively associated <B> with </ B> of the input means, for example having a recessed portion in the blank p allowing gripping for pulling by a user.

The invention also proposes a packing box formed from a single blank made of cardboard or corrugated cardboard material, comprising a first vertical wall connected by junction lines to the bottom walls. , from above and to the adjacent side walls of the box, characterized in that said connecting lines are precut and in that the opposite vertical wall <B> to </ B> the first wall is secured to the bottom wall by the intermediate of at least one pre-cut frangible portion separable by simple pulling and / or one or more gluing points manually removable by simple pulling.

By detachable by simple traction, it must be understood by manual separation obtained by exerting a force perpendicular to the walls.

As <B> already </ B> mentioned, the <B> or </ B> the partially precut portions and / or the gluing point (s) are arranged to have a good resistance in the vertical direction, ie as long as the efforts are essentially in the plane of the walls.

If on the other hand the spacing force exerted between the walls is frankly perpendicular to the walls, they are then easily detached manually without delamination of the carton, for example with a force of the order of <B> 5 to 10 </ B> Newtons, advantageously and for example after passing a hard point requiring an extra effort of a few Newtons from the user, using for example his thumb as a foil and / or lever to pass this hard point.

Moreover, it should be noted that, as long as the first side wall of the body is not torn manually by the user, the body retains <I> its </ I> rigidity, which does not allow separation or yawning promoting a risk of tear initiation, furthermore advantageously still prevented by the hard point mentioned above. In advantageous embodiments, one of the following provisions is also used <B> to </ B> and / or <B> to </ B>: </ B> <B Adjacent walls <B> to </ B> the first wall are integral with the bottom wall by means of at least one pre-cut frangible portion, for example substantially rectangular, detachable by simple pulling and / or one or more gluing points manually removable by simple pulling <B>; </ B> <B> - </ B> the walls of the body being formed by flaps and / or flaps of the blank, frangible portions pre-cut are cut along an open line with respect to the edge of the flap and / or the corresponding flap.

The invention also proposes a box obtained with a blank as described above.

The invention will be better understood by reading the following description of embodiments given as non-limiting examples. The description refers to the accompanying drawings in which <B>: </ B> <B> - </ B> Figure <B> 1 </ B> is a plan view <B> dl </ B blank according to a first embodiment of the invention.

<B> - </ B> Figure 2 is a plan view of another embodiment of the flaps of the second flap of the blank of Figure <B> 1. </ B>

<B> - </ B> Figure <B> 3 </ B> is a plan view of another embodiment of the flaps of the second flap of the blank of Figure <B> 1. </ B> < B> - </ B> igure 4 is a block diagram of the formation and opening of a packing crate with the blank of figure <B> 1, </ B> préjonctionné.

<B> - </ B> Figure <B> 5 </ B> is a plan view of a strip of cardboard cut continuously to form blanks as shown in Figure <B> 1. </ B>

<B> - </ B> Figure <B> 6 </ B> is a plan view of another blank embodiment according to the invention.

<B> - </ B> Figure <B> 7 </ B> is a block diagram of a packing box <B> to </ B> from the bottom of <B> f </ B> igure <B> 1, </ B> by coating the load with the blank.

<B> - </ B> Figure <B> 8 </ B> is a plan view of another embodiment of the blank according to the invention.

<B> - </ B> Figure <B> 9 </ B> is a schematic diagram of the formation of a box <B> to </ B> from a blank of the type described in reference <B > to </ B> the figure <B> 8. </ B>

In the following description, we will use same reference numbers to designate the same elements.

Figure <B> 1 </ B> shows a blank <B> 1 </ B> of double-sided corrugated board, for example <B> 3 </ B> mm thick. The blank consists of a series of four rectangular shutters 2, <B> 3, </ B> 4 and <B> 5 </ B> interconnected by fold lines.

Specifically, the following has a first flap 2 for <B> to </ B> form a side wall of the body, connected by a first line of junction <B> 6, </ B> confused with a fold line between flaps, <B> to </ B> a second flap <B> 3 </ B> intended to <B> to </ B> form the bottom of the crate, and respectively by a second line <B> 7 </ B > and a third line <B> 8 </ B> junction also forming fold lines <B> to </ B> two flaps adjacent <B> 10 </ B> and <B> 11, </ B> rectangular or substantially rectangular.

The first component 2 is also connected to a third rectangular component 4, by a fourth connecting line consisting of a hat-shaped line. Line <B> 9 </ B> is <B> to </ B> on the fold line 12, parallel and on the opposite side <B> to </ B> the fold line <B> 6 < / B> to form the opposite ridge of the crate.

The suite comprises a fourth rectangular flap intended to form the wall of the opposite body to the first wall 2.

Each of the first, second, third and fourth joining lines <B> (6, 7, 8, 9) </ B> are pre-cut according to the invention.

The junction line <B> 9 </ B> makes it possible to determine two rectangular or trapezoidal parts <B> 13 </ B> and 14, of flap, located on either side of a central portion <B> 15 </ B> in trapezoidal shape, <B> to </ B> riding on the line and having a portion located on third flap 4, terminated by an opening recess <B> 16 </ B> made in said third flap intended < B> to </ B> form the top of the crate.

The line <B> 15 </ B> has a shape of n or hat. The recess is for example rectangular and / or triangular, and allows <B> to </ B> the user to pass or several fingers so <B> to </ B> tear the first wall formed by the first component 2 .

Each of the flaps <B> 3. </ B> 4 and <B> 5 </ B> also has both sides and in the extension of the two flaps <B> 10 </ B> and 12 of the first flap 2 rectangular flaps <B> or </ B> substantially rectangular respectively <B> 17, 18; 19, </ B> 20 and 21, 22 own <B> to </ B> cooperate once the crate formed with the flaps of the first flap so as <B> to </ B> form opposite side walls openwork of the checkout.

The second <B> 3 </ B> flap comprises on the opposite side to the first flap a set of <B> 23 </ B> three rectangular or substantially rectangular flaps, <B> to </ B> know a central flap 24 connected at the second flap by a fold line <B> 25 </ B> and two small end flaps <B> 26 </ B> connected respectively by folding lines <B> 27 </ B> located in the extension <B> or </ B> substantially in the extension of the fold line <B> 25, </ B> to the two side flaps <B> 17 </ B> and <B> 18 </ B> of the second flap <B> 3. </ B>

These two side flaps <B> 17 </ B> and <B> 18 </ B> each contain, respectively, and respectively, on the side of the first flap 2, a pre-cut frangible portion <B> 28, 29 </ B> along an open line with one side <B> 30, </ B> fully open outward from the flaps <B> from </ B> to and from the first flap on the other hand .

The fourth flap <B> 5 </ B> comprises as to <B> to </ B> him on its outer edge <B> 32 </ B> located on the opposite side to the third flap 4 a pre-cut frangible portion <B> 33 , </ B> for example rectangular or trapezoidal clean <B> to </ B> cooperate with the central flap 24 of the second flap <B> 3. </ B> This portion precut <B> 33 </ B> is extended to the flap <B> 5 </ B> by a recessed portion 34 in said fourth flap <B> 5, </ B> gripping the wall, to allow easy tearing once the blank shaped to form a package.

there is shown on the other embodiments of the flaps of the second flap <B> 3 </ B> according to the invention.

FIG. 2 thus shows a second flap <B> 3 </ B> provided with two lateral flaps <B> 171 </ B> and <B> 18 ', </ B> each provided with an end flap < B> 26. </ B> Both flaps <B> 1 </ B> and <B> 181 </ B> are each provided with two partially precut portions <B> 35 </ B> and <B> 36, 37 </ B> and <B> 38, </ B> rectangular or substantially rectangular, symmetrical two <B> to </ B> two relative <B> to </ B> the longitudinal axis <B> 39 < / B> of the flan.

Portions <B> 35 </ B> and <B> 37 </ B> are located <B> at </ B> the end of the flaps facing the first flap 2 and are free on three sides.

Portions <B> 36 </ B> and <B> 38 </ B> are located on the side of the other end of the flaps and are free on two sides, which allows to spare a portion <B> 39, < / B> 40 in the flap <B> 171, 181 </ B> to the flap <B> 3. </ B>

Figure <B> 3 </ B> shows another embodiment of the flaps 1711, 181, the second flap <B> 3 </ B> according to the invention. Each flap is provided with two pre-cut portions <B> 28 '</ B> and <B> 291, </ B> of the type of parts <B> 28 </ B> and <B> 29 </ B> described in reference <B> to </ B> the figure <B> 1, </ B> and two other pre-cut parts 41 and 42, free only the side confused with the outer edge of the flap.

In this embodiment, the flaps 1711, 1811 are not provided with small end flaps.

It is against the central flap 43 of the flap <B> 3 </ B> which has two small tabs or end flap 44, which can be folded to form a box according to the invention.

This will now more particularly be described with reference to FIG. 4, giving a block diagram 45 of a first embodiment of forming the box obtained with the blank <B> 1 </ B> described above.

<B> A </ B> from the blank <B> 1 </ B> prejunctionned through the central flap 24 with the pre-cut port <B> 33 </ B> of the fourth flap <B> 5, </ B> open the blank at 46, then put <B> at </ B> the square (step 47).

The load 48 is introduced laterally into the package, as shown at 49, and the side flaps intended to form the side walls of the body are folded after pre-gluing, for example with hot-melt glue. , in particular portions <B> 28, <B> 29 </ B> partially precut, so <B> to </ B> form the box as shown at the end of training in <B> 50. </ B>

The crate is then conveyed and brought to, for example, a supermarket. The wall formed by the first flap 2 is then torn off (step <B> 51) </ B> manually by a user, which the latter can easily do in view of the pre-cut junction lines, then the package is put on the shelf (not shown).

The lower part 52 forming the bottom is separated at the level of the pre-cut portions <B> 28, </ B> <B> 29 </ B> by outwardly spacing in the direction of the arrow <B> 53 </ B > (step 54).

The bottom <B> 52 </ B> in the shape of a shovel is then extracted from below, by the user who retains by manually pushing the top or the "upper" part of the box and the load 48.

Finally, the upper part of the crate is removed so as to completely release the load 48 on the shelf.

The <B> f </ B> igure <B> 5 </ B> shows a set <B> 56 </ B> of <B> f </ B> lans <B> 1, 1 </ B> < B> 1 </ B> as described in reference <B> to <B> f </ B> igure <B> 1, </ B> which can be easily manufactured <B> to </ B> from the same width of cardboard, continuously.

Pre-cut <B> 6, 7, 8, 9 </ B> or pre-cut portion <B> 28, 29, 33 </ B> junction lines are obtained by punching the dotted cardboard with cutting blades <B> to </ B> perforating filer.

The dotted lines are thus defined by alternating perforated lines and non-perforated lines called attachment points.

The distance between two attachment points, or in other words the length of cut, is called <B> D1 </ B> and the distance between two perforated lines, or in other words the length of the point of attachment, is called <B> D2, </ B> a perforating profile is defined by the two digits corresponding <B> to Dl </ B> and <B> D2. </ B>

Depending on the nature and weight of the paper, as well as the thickness of the corrugated board, the values of <B> Dl </ B> and <B> D2 </ B> are varied to find the best compromise possible to allow easy tearing while maintaining a sufficient iditeness of the packaging.

Advantageously, it is thus possible to vary <B> D1 </ B> and <B> D2 </ B> on the same precut line to create more fragile points or hard points as indicated above.

Figure <B> 6 </ B> shows another embodiment of opposing <B> 57, 571 </ B> blanks manufactured continuously <B> from </ B> from the same width of cardboard.

The first pane <B> 58 </ B> here has two flaps <B> 59 </ B> and <B> 60, </ B> symmetrical relative <B> to </ B> the longitudinal axis <B > 61 </ B> of the blank and each formed of a first rectangular portion and a second trapezoidal or substantially triangular portion of greater height than the first portion located on the side of the third flap <B> 62 </ B> and directed to the outside of the blank.

The flaps <B> 63, </ B> 64 of the second flap intended to form the bottom of the package, are pet rectangular flaps located on the periphery of said second flap. The two side flaps <B> 63 </ B> are extended by a small tongue <B> 65, </ B> the central flap 64, end, being for example the same width as the side flaps <B> 63 . </ B>

The third flap <B> 62 </ B> and the fourth flap <B> 66 </ B> each have on each side two large rectangular or substantially rectangular flaps <B> 67, 68, </ B> for <B> to </ B> form when they are glued together, and with the flaps of the first and second flaps, the other two side walls of the body.

on the <B> f </ B> igure <B> 7 </ B> is shown another embodiment of forming a package <B> to </ B> from <B> dl </ B> flan <B> 1 </ B> according to the invention In this case the blank <B> 1 </ B> is not pre-faulted as described in reference <B> to </ B> in FIG. 4, but brought <B > to </ B> dish (step <B> 70). </ B>

The load <B> 71 </ B> can either be boosted (mode not shown), or fed laterally onto the blank (step <B> 72), </ B> before folding the blank around the package by coating as shown in <B> 73, </ B> load resting on the top of the third tier 4 package.

The package is then finished as shown at 74 in FIG. 7, the flaps <B> 10, 11; 21, 22, then <B> 17, </ B> </ B> B> 18, 19, </ B> 20 being folded after gluing, the second flap <B> 3 </ B> clean <B> to </ B> form the bottom of the package, being folded over the load, its central end flap 24 being glued to the pre-cut portion <B> 33 </ B> of the fourth flap <B> 25 </ B> as shown in <B> 75. </ B> On the <B> f </ B> igure <B> 8 </ B> there is shown another embodiment of a blank <B> 80 </ B> according to the invention comprising a first flap <B> 81 </ B> connected by first, second, third and fourth precut lines <B> 82, 83, </ B> 84, <B> 85 </ B> respectively <B> to </ B> a second flap <B> 86 , <B> 87 </ B> a third panel and a fifth panel <B> 88, </ B> the second panel <B> 86 </ B> being intended <B> to </ B> form the bottom of the case and being identical example to the second part described reference <B> to </ B> the igure <B> 1. </ B>

The third and fifth flaps <B> 87, 88 </ B> are as far as <B> to </ B> they are located on both sides of the first flap <B> 81, </ B> with which they are connected by second and third pre-cut junction lines merged with the fold lines, the fourth connecting line <B> 85 </ B> being as <B> to </ B> it <B> to </ B> horse with a folding line <B> 89 </ B> joining with a rectangular flap <B> 90 </ B> to form portions identical to the portions <B> 13, </ B> 14, <B> 15 </ B > and an identical recess <B> to </ B> the recess <B> 16 </ B> of the blank of the figure <B> 1. </ B>

A fourth panel <B> 91 </ B> is provided <B> at </ B> the end of the fifth panel <B> 88 </ B> and has the identical pre-cut portion <B> 92, </ B> <B> to </ B> the portion <B> 33 </ B> according to the invention, which will be glued to the end flap <B> 93 </ B> of the second flap.

The fourth flap further comprises a tab end 94 bonding with the third flap <B> 87 </ B> (or conversely the tab can be on the third flap and sticks on the fourth) each of the third, fourth and fifth flaps with a substantially rectangular flap, <B> 95 </ B> <B> 96, 97 </ B> of the same width as the flap of the first flap and which are intended <B> to </ B> form the top of the fund. The flaps <B> 95 </ B> and <B> 97 </ B> are symmetrical with respect to the first flap <B> 81 </ B> and comprise for example a setback <B> at </ B> the angle located on the flap <B> 90 </ B> side of the first flap, of complementary shape <B> to </ B> the portion <B> 15. </ B> <B> 9 < / B> the formation of a box <B> 98 </ B> according to the invention <B> to </ B> from a blank <B> 80 </ B> of the type described in reference la Figure <B> 8. </ B>

The blank is first brought <B> to </ B> flat and then preformed in the form of a belt, the tongue 94 being glued on the third flap <B> 87, </ B> the bottom <B> 86 </ B> the box being brought back and then glued. The box is then tilted open (step <B> 99), <B> 100 </ B> then being introduced before closing the flaps <B> 90, 96 </ B> then <B> 95 , 97 </ B> to form the top of the box.

It goes without saying, and as it also follows from the foregoing, the present invention is not limited to the more particularly described <B> plus </ B> embodiments. On the contrary, it encompasses all the variants and in particular those where the pre-cut portions partly belong to the flaps of the first and not of the second flap.

Claims (1)

<U> CLAIMS </ U> <B> 1. </ B> Flan <B> (1, 11, 11 1; 57, 571; 80) </ B> made of cardboard or corrugated board material for manufacture of a box comprising at least four rectangular flaps, said rectangular flaps comprising a first flap (2, <B> 58, 81) </ B> intended to <B> to </ B> form a first side wall of the body connected by a first connecting line <B> (6, 82) to </ B> a second flap <B> (3, 86) </ B> intended to <B> to </ B> forming the bottom of the box , and respectively by second, third and fourth joining lines <B> (7, 8, 9, 1 </ B> 84, <B> 85) to </ B> adjacent panels formed by one of the flaps <B > (10, 11; 90) </ B> and at least one third flap (4 <B>; 62; 87, 88) </ B> of said rectangular flaps, and a fourth flap <B> (5; 66; 91) </ B> rectangular <B> to </ B> form a second side wall the opposite case <B> to </ B> the first wall, characterized in that the second flap <B> (3 86) </ B> has two side flaps <B> (17, 18; 17 ', 18' </ B> 1711, 1811 <B>; 63) </ B> and an end flap (24, 43 43 <B>; <B> 93), in that the first, second, third and fourth joining lines are pre-cut and in that the fourth flap <B> (5; </ B> <B> 66; 91) </ B> or the end flap of the second flap comprise at least one portion <B> (33; 92) </ b> pre-cut frangible. 2. Blank <B> (1, 11, </ B> 111 <B>; 57) </ B> according to claim 1, characterized in that the second and third connecting lines B> (7, 8) </ B> are fold lines connecting the first flap (2) <B> to </ B> adjacent flaps <B> (17, 18) </ B> intended <B> at least partially forming side walls of the body and the fourth joining line <B> (15) </ B> is a line connecting first component (2) <B> to </ B> a third flap (4 <B>; 62) </ B> intended to <B> to </ B> form the top of the crate. <B> 3. </ B> Flan <B> (80) </ B> according to claim 1, characterized in that the second and third connecting lines <B> (83, < / B> 84) are fold lines connecting the first flap <B> (81) to </ B> two adjacent flaps <B> (87, 88) </ B> intended to <B> to </ B> form the sides of the box and the fourth line of junction <B> (85) </ B> is line connecting the first flap <B> (81) to </ B> a flap upper <B> (90) </ B> intended to <B> to </ B> at least partly form the top of the crate. 4. Blank according to any one of the preceding claims, characterized in that the side flaps <B> (17, 18; 63) </ B> of the second flap <B> (3, </ B> <B> 86) </ B> are each respectively provided with <B> </ B> portion <B> (28, 29; 28 ', 29'; 35, 37) </ B> frangible pre-cut substantially rectangular. <B> 5. </ B> Blank according to claim 4, characterized in that the portions <B> (28, 29; 281, 29, 35, 37) </ B> frangible precut of the two side flaps of the second component are cut along an open line with a fully open side to <B> 1 </ B> outside said flaps. <B> 6. </ B> Blank according to any one of claims 4 and <B> 5, </ B> characterized in that the portions <B> (281, 291; 35, 37) </ B> pre-cut frangibles are located on the side of the first flap (2) and in that each of said side flaps <B> (171, 18 '</ B> <B> 181 1) </ B> of the second flap <B> (3 ) </ B> includes at least one <B> (36, 38 </ B> 41, 42) frangible additional precut portion. <B> 7. </ B> Blank according to any one of the preceding claims, characterized in that the fourth connecting line <B> (15, 85) </ B> is hat-shaped <B> to </ B> horse on the fold line between the first shutter and the adjacent panel. Blank according to any one of the preceding claims, characterized in that the portion <B> (33, 92) </ B> frangible precut of the fourth flap <B> (5, 91) < / B> and the fourth pre-cut junction line <B> (15, 85) </ B> are respectively associated <B> with </ B> a portion <B> (16, </ B> 34) hollowed out in the blank allowing gripping for pulling by a user. <B> 9. </ B> Packing Box formed <B> from </ B> (1, 57, 80) </ B> single sheet material made of cardboard or cardboard corrugated, having a first wall (2, <B> 58, 81) </ B> vertically connected by junction lines <B> (6, 7, 8, 9; 82, 83, </ B> 84, < B> 85) </ B> at the walls of the bottom, the top and the adjacent side walls of the box, characterized in that said connecting lines are pre-cut and in that the opposite vertical wall <B> to </ B> the first wall is secured to the bottom wall by means of at least one portion <B> (33, 92) </ B> f pre-cut row separable by simple pulling and / or one or more manually peelable bonding points by simple pulling. <B> 10. </ B> Case according to claim 9, characterized in that the adjacent side walls <B> to </ B> the first wall (2, <B> 58, 81 ) </ B> are secured to the bottom wall by means of at least a portion <B> (28, 29; 28, 29 '; 35, 37 </ B> 41, 42) frangible pre-cut substantially rectangular detachable by simple pulling and / or one or more gluing points manually removable by simple pulling. <B> 11. </ B> Case according to claim 10, characterized in that, the walls of the box being formed by flaps and / or blank flaps, the pre-cut frangible portions are cut out. along an open line with respect to the edge of the shutter and / or the corresponding flap. 12. Box according to any one of the preceding claims, characterized in that it is formed from a blank comprising at least four rectangular flaps, said rectangular flaps comprising a first flap (2, <B). > 58, 81) <B> to </ B> form the first side wall of the body connected by a first connecting line <B> (6, 82) to </ B> a second flap < B> (3, 86) <B> to </ B> form the bottom of the box and respectively by second, third and fourth lines of joining <B> (7, 8,; 83, < / B> 84, <B> 85) to </ B> adjacent panels forming one of the flaps <B> (10, 11 90) </ B> and at least one third flap (4 <B>; </ B> > <B> 62; 87 88) </ B> rectangular remaining, and a fourth flap <B> (5 66; 91) </ B> rectangular intended to <B> to </ B> form a second side wall of the case the second flap with two side flaps and an end flap (24 <B>; <B>; </ B> 64 <B>; 93), </ b> the fourth flap <B> (5; 66; 91) </ B> or the end flap of the second flap with the <B> (33 92) </ B> pre-cut frangible portion. <B> 13. </ B> Crate according to claim 12, characterized in that the second and third connecting lines <B> (7, 8) </ B> are fold lines connecting the first flap (2) <B> to </ B> adjacent flaps <B> (17, 18) </ B> intended to <B> to </ B> at least partially form the adjacent side walls of the body and the fourth joining line < B> (15) </ B> is a line connecting the first pane (2) <B> to </ B> a third pane (4 <B>; 62) </ B> destined <B> to </ B> > form the top wall of the box. 14. Box according to claim 12, characterized in that the second and third connecting lines <B> (83, </ B> 84) are fold lines connecting the first flap <B> (81) to </ B > two adjacent flaps <B> (87, 88) </ B> intended to <B> to </ B> form the adjacent walls of the body and the fourth line of junction <B> (85) </ B> is a line connecting the first flap <B> to </ B> a top flap <B> (90) </ B> intended to <B> to </ B> form at least partly top wall of the body. <B> 15. </ B> Case according to any one of claims 12 <B> to </ B> 14, characterized in that portions <B> (28, 291; 35, 37) </ B> pre-cut frangible are located on the side of the first flap (2) and in that each of said side flaps <B> (171, 181; 17 1, </ B> <B> 18, 1) </ B> of the second flap <B> (3) </ B> comprises at least one <B> (36, 38 </ B> 41, 42) frangible additional precut portion. <B> 16. </ B> Case according to any one of claims 9 to 15, characterized in that the fourth connecting line <B> (15, 85) </ B> is shaped hat <B> to </ B> horse on the fold line (12) between first wall and the top wall of the body. <B> 17. </ B> Case according to any one of claims <B> 9 to 16, </ B> characterized in that the first wall and the opposite wall are associated with a hollow portion in the blank for tearing by a user.