ES2768032A1 - STOPPING DEVICE TO BE FIXED TO THE NECK OF A CONTAINER (Machine-translation by Google Translate, not legally binding) - Google Patents

Abstract

A capping device that attaches to the neck of a container. The invention relates to a capping device (1) intended to be fixed to a neck (2) of a container to close a hole in said neck (2) and comprising: - a lower ring (4) intended to be mounted axially fixed to the neck (2) and rotatable in the neck (2) around an X axis; - a stopper (3) having a helical thread (12) intended to cooperate with a helical thread (9) formed in the neck (2) of the container; and - a connection device (5) that connects the plug (3) to the lower ring (4) and is arranged in such a way that the plug (3) moves away from the lower ring (4) when unscrewing the plug (3) and thus allow the plug (3) to open.

Description

DESCRIPTION

Capping device that attaches to the neck of a container

Technical field

The invention relates to a capping device for a container and to a container provided with such a capping device.

The invention relates more particularly to a capping device that holds a stopper attached to the neck of a container, which prevents the stopper from being lost in nature.

Background in the art

In the state of the art, molded plugging devices are known which comprise a lower ring intended to be axially fixed to the neck of a container, a plug to close the neck hole and which has an internal thread intended to cooperate with an external thread of the neck and a connecting device that connects the plug to the lower ring. In this way, the connection device allows the cap to be fixed to the neck of the container in a captive way.

Such capping devices are described, for example, in EP1124734 and EP2308772. However, the prior art capping devices are not completely satisfactory. In particular, the connection devices that provide the connection between the plug and the bottom ring have complex shapes that are particularly difficult to mold. Furthermore, these plugging devices are equipped with locking devices to lock the plug in the open tilted position, which further increases the complexity of molding such plugging devices and is likely to annoy the consumer.

Furthermore, JP4906441 discloses a capping device comprising a bottom ring fixed axially to the neck of a container, a stopper adapted to screw onto the neck of the container and a connection device that captively connects the stopper to the bottom ring. The connection device comprises two parallel arms extending parallel to the X-axis of the cap's threading when the cap device is molded into an open cap configuration. When the stopper is screwed onto the container neck and the stopper is placed close to the bottom ring, the two parallel arms are twisted and tilted with respect to the vertical. Such a capping device is also unsatisfactory. In fact, the plugging device is necessarily molded in the open position, so that the manufacturing of the plugging device requires an additional manufacturing step for the formation of the frangible bridges connecting the plug and the bottom ring before the first opening the cap. Also, the connecting arms are permanently restricted when the cap is closed, which can damage the connecting device over time.

Summary

An idea underlying the invention is to provide a capping device that allows a cap to be attached to the neck of a container that is reliable and easy to manufacture.

According to an embodiment, the invention provides a plugging device intended to be fixed to the neck of a container to close a hole in said neck and comprising: - a lower ring intended to be mounted axially fixed to the neck and rotatable on the neck around a X axis;

- a cap comprising an upper wall intended to be arranged in front of the neck hole and an outer peripheral skirt intended to surround said neck, the outer peripheral skirt having a helical thread intended to cooperate with a helical thread formed in the neck of the container, so that the cap can be screwed or unscrewed on the neck around the X axis; and

- a connection device that connects the cap to the bottom ring and is arranged to allow the cap to move away from the bottom ring when the cap is unscrewed and thus allowing the cap to open; the connection device comprising first and second parallel connection arms each connecting the outer peripheral skirt to the lower ring and each comprising a central part, said central part having, in an unrestricted state corresponding to a closed position of the cap, a circular helical shape that develops around the X axis in a direction opposite to that of the helical thread of the outer peripheral skirt, so that the first and second connecting arms are straightened to allow the plug to move away from the lower ring when unscrewing the lid of the neck.

Such a connection device has shapes that are easier to mold than the prior art capping devices. Furthermore, the unrestricted state of the connection device corresponds to a closed position of the plug, so that the plugging device can be molded in one piece in the closed configuration of the plug, further facilitating its manufacture.

According to other advantageous embodiments, said capping device may have one or more of the following characteristics:

According to one embodiment, the capping device is molded in one piece.

According to one embodiment, the molding device can be molded in the closed configuration of the cap.

According to one embodiment, the first and second connecting arms are separated by a distance L2 of between 6 mm and 12 mm. This makes it possible to limit the stresses exerted on the connecting arms when the cap is opened.

According to one embodiment, the first and second connecting arms respectively extend around the X axis in a first and second angular sector, the first and second angular sector overlapping partially.

According to one embodiment, the first and second connecting arms each comprise a first end part that extends from the lower ring and is connected to the central part of said connecting arm through a first bent part and a second part end part that extends from the outer peripheral skirt of the cap and is connected to the central part of said connection arm by a second bent part. These geometries of the connection arms allow, in particular, to avoid the generation of stress concentration areas that can cause breakages in the connection arms.

According to one embodiment, the first and second end parts of the first and second connecting arms have an area with a width shorter than that of the central part. Such areas allow to form preferential folding areas in which the arms Connection folds fold when the plug is rotated to its open tilted position.

In accordance with one embodiment, the first and second end portions extend parallel to the X axis.

According to one embodiment, the first end parts are coupled to the bottom ring by means of an angle. According to one embodiment, the second end parts are coupled to the outer peripheral skirt by means of an angle. Such angles have the effect of further limiting stress concentrations.

According to one embodiment, the outer peripheral skirt has a toothed part, the second end part and the central part of the first and second connecting arms being housed in said toothed part.

According to one embodiment, the toothed part of the outer peripheral skirt comprises, between the first and second connecting arms, a projecting part projecting towards the lower ring. Said projecting part is intended to limit the dimensions of the free space between the connecting arms that can allow the passage of dust.

According to one embodiment, the notch has a lateral edge that follows the contour of the first connecting arm.

According to an embodiment, the protruding part protruding from the toothed part of the outer peripheral skirt has a trapezoidal shape delimited by vertical lateral edges that respectively face the second end part of the first and second connecting arms and by a lower edge which is parallel to the central part of the second connecting arm.

According to an embodiment, the lower ring has a toothed part and the first end part of the first and second connecting arms is housed in said toothed part.

According to one embodiment, the toothed part of the lower ring comprises, between the first and second connecting arms, a projecting part projecting towards the plug. Said projecting part is intended to limit the dimensions of the free space between the connecting arms that can allow the passage of dust.

According to an embodiment, the protruding part protruding from the toothed part of the lower ring has a trapezoidal shape delimited by vertical lateral edges that respectively face the first end part of the first and second connecting arms and by an upper edge parallel to the central part of the first connecting arm.

According to one embodiment, the first and second connecting arms are of sufficient length to allow the thread of the plug to disengage from the thread of the neck.

According to one embodiment, the first and second connecting arms each have a length greater than G / (1-sin y) where:

G: an axial dimension between an inner face of the top wall of the plug and a bottom end of the thread of the plug; and

y: the angle formed between a first straight line BD and a second straight line AB, the first straight line AB connecting the center B of the horizontal segment formed at the junction between the first end part of the first connecting arm and the lower ring and the center D of the horizontal segment formed at the junction between the second end part of the first connecting arm and the outer peripheral skirt and connecting the second straight line AB to the center A of the horizontal segment formed at the junction between the first end part of the second connecting arm and bottom ring and center B.

According to one embodiment, the lower ring is connected to the outer peripheral skirt by frangible bridges. Such frangible bridges are intended to serve as witnesses to inviolability.

In accordance with one embodiment, the plug has an inner skirt that extends perpendicularly downward from the top wall of the plug and is intended to be inserted into the neck opening.

According to one embodiment, the plug further comprises an annular lip which is It extends radially from the top wall between the inner skirt and the outer peripheral skirt and is intended to come into contact with an external face of the neck.

According to an embodiment, the invention also provides a container equipped with a neck comprising a hole and a thread, said container further comprising a plugging device mentioned above, the bottom ring of the plugging device being axially fixed to the neck and being able to rotate around said neck, the thread of the outer peripheral skirt of the cap cooperating with the thread of the neck.

Brief description of the figures

The invention will be better understood, and other objects, details, features and advantages thereof will appear more clearly in the following description of various particular embodiments of the invention, which are provided for illustrative and non-limiting purposes only with reference to the accompanying drawings.

- Figure 1 is a perspective view of a capping device according to a first embodiment in the closed position.

- Figure 2 is a front view of the neck of a container intended to be equipped with the capping device of Figure 1.

- Figure 3 is a perspective view of the capping device of figure 1 when opening the cap.

- Figure 4 is a perspective view of the capping device of Figures 1 and 3 when the cap is in the open inclined position.

- Figure 5 is a sectional view of a capping device according to an embodiment, mounted on the neck of a container.

- Figure 6 is a front view of a capping device according to an alternative embodiment.

- Figure 7 is a front view of the capping device of Figure 6 in which geometric indications have been added.

Detailed description of realizations

In the description and figures, the X axis corresponds to the axis of rotation of the cap of the capping device when screwed onto the neck of a container. Furthermore, in the description and claims, the terms "external" and "internal" will be used in accordance with the definitions given in the description of the elements of the capping device. By convention, the "radial" orientation is directed orthogonal to the X axis. The terms "external" and "internal" are used to define the relative position of one element with respect to another, with reference to the X axis, such that an element close to the X axis is called internal versus an external element located radially on the periphery. The terms "top" and "bottom" are used to define the relative position of one element with respect to another with reference to a position in which the The neck hole is directed upwards and the stopper is in the closed position in the neck of the container, being designated as lower an element intended to be placed lower and higher an element intended to be placed higher.

With respect to Figures 1 to 5, a capping device 1 according to a first embodiment is described. The capping device 1 is intended to be mounted on the neck 2 or mouth of a container, as shown in figure 2. The container is, for example, a bottle.

The plugging device 1 comprises a lower ring 4 that is intended to be retained in the neck 2 of the container, a plug 3 intended to cover the hole of the container to close it and a connection device 5 that connects the plug 3 to the lower ring 4 , while allowing said stopper 3 to move away from lower ring 4 to allow opening of stopper 3.

As shown in FIG. 2, the neck 2 of the container has a frusto-conical collar 6 that tapers upward, that is, in the direction of the hole in the container. The collar 6 delimits, downwards, that is to say, in a direction opposite to the hole, a projection 7. The lower ring 4 comprises fastening elements, as shown in Figure 5, which allow the lower ring 4 to be retained in the neck 2. The fastening elements here are tabs 8 which are arranged on the radially inner surface of the lower ring 4 and that project radially inward. During the mounting of the capping device 1 in the neck 2 of the container, the tabs 8 slide against the frusto-conical surface of the collar 6 extending beyond the lower end of the collar 6 and then locking, by elastic return, behind the shoulder 7. The lower ring 4 is thus axially immobilized on the neck 2 at the same time as it can rotate with respect to the X axis.

The neck 2 also comprises a thread 9 formed by a series of helical ribs, represented in Figures 2 and 5. As shown in Figure 5, the plug 3 comprises a top wall 10 intended to be arranged substantially orthogonal to the X axis. opposite the neck hole 2 and an outer peripheral skirt 11 intended to surround the neck 2 of the container. The outer peripheral skirt 11 extends, downwards, perpendicular to the upper wall 10, from the outer periphery of said upper wall 10. The outer peripheral skirt 11 has, on its inner face, a thread 12 formed by a series of helical ribs intended to cooperate with the series of helical ribs formed on the outer surface of the neck 2. Therefore, the stopper 3 is adapted to screw on the neck 2 in order to close the container and to unscrew from the neck 2 in order to open the container.

As shown in Figures 1, 3 and 4, the outer peripheral skirt 11 has, on its outer face, an upper part 13 that is equipped with a series of grooves distributed around the X axis and extending parallel to said axis X. The grooves thus provide a rough surface that facilitates the grip of the stopper 3 by the user or the bottling line mounting device, which is intended to secure the mounting of the stopper 3 in the neck 2 of the container.

Furthermore, the plug 3 also comprises an inner skirt 14, in particular represented in figure 5, which extends perpendicularly downwards from the top wall 10 of the plug 3 and is suitably sized to fit within the inner wall of the neck hole 2. The plug 3 also has an annular lip 15, also shown in Figure 5, which extends from the top wall 10 radially between the inner skirt 14 and the outer peripheral skirt 11. As shown in Figure 5 , the inner skirt 14 and the annular lip 15 are dimensioned in such a way that, when the stopper 3 is in the closed position on the neck 2 of the container, the inner skirt 14 is in contact with the inner face of the neck 2 while the annular lip 15 is in contact against the outer face of neck 2. Thus, inner skirt 14 and annular lip 15 allow sealing of the closure.

The lower ring 4 is connected to the stopper 3 before the first opening of the container, by means of frangible bridges 16, two of which are shown in figure 1, destined to break when the stopper 3 is opened. These frangible bridges 16 thus constitute witnesses of inviolability. More particularly, frangible bridges 16 are distributed around the X axis and connect the upper edge of the lower ring 4 and the lower edge of the outer peripheral skirt 11. In accordance with another embodiment not shown, the lower ring 4 and the plug 3 are connected to each other by a tear-off strip interposed axially between the plug 3 and the lower ring 4 and which, on the one hand, is connected to the lower ring 4 by frangible bridges 16 and on the other hand, connected to the plug 3 by frangible bridges 16.

Furthermore, the connection device 5 that provides a connection between the stopper 3 and the lower ring 4 is arranged to allow said stopper 3 to move away from the lower ring 4 to allow opening of the stopper 3. The connection device 5 comprises arms of first and second connection 17, 18 identical and parallel, each of which is connected, on the one hand, to the lower ring 4 and, on the other hand, to the outer peripheral skirt 11 of the plug 3.

As shown, for example, in Figure 1, each of the two connecting arms 17, 18 comprises a first end part 19 that is anchored to the lower ring 4, a second end part 20 that is anchored to the outer peripheral skirt 11 of the plug 3 and a central part 21 which is respectively connected to the first and second end parts 19, 20 by the first and second bent parts 23, 24. Advantageously, the connecting arms 17, 18 follow the outer curve of the lower ring 4 and the outer peripheral skirt 11. Furthermore, advantageously, the first end part 19 and the second end part 20 are connected to the lower ring 4 and the outer peripheral skirt 11 by means of angles, allowing limiting stress concentrations.

When the plug 3 is in the closed position, as shown in Figure 1, the first and second end parts 19, 20 of each of the connecting arms 17, 18 are angularly offset from each other and the central parts 21 are inclined with respect to the vertical to connect the first and second end parts 19, 20 of each of the connecting arms 17, 18. The closed position, illustrated in Figure 1, corresponds to the state in which the capping device 1 is molded. Therefore, in this closed position, the connecting arms 17, 18 are in a state of rest, without restrictions.

The central parts 21 of the connecting arms 17, 18 are parallel to each other and each follows a guide line having a circular helical shape. The angle a of the circular helical shape is constant and the X axis forms the helical axis. The direction of the circular helical shape of the central parts 21 is reversed with respect to that of the thread 12 intended to ensure the fixation of the plug 3 in the neck 2.

In the connection area in which the connection device 5 is arranged, the outer peripheral skirt 11 has a toothed part 24 in which the second end part 20 is housed as well as the central part 10 of the connection arms 17, 18. In this way, the second end part 20 and the central part 21 of the connection arms 17, 18 extend above the lower edge of the outer peripheral skirt 11 outside the connection area. One of the side edges 25 of the toothed part 24 extends vertically while the other side edge 26 substantially follows the contour of the first connecting arm 17 comprising, from bottom to top, a first vertical part, a second part parallel to the part central 21 of the first connection arm 17 and a third vertical part. Furthermore, the toothed part 24 comprises, between the two connecting arms 17, 18, a projecting part 28 projecting downward. The protruding part 28 has a trapezoidal shape delimited by two vertical lateral edges that respectively face the second end part 20 of any of the two connecting arms 17, 18 and by a lower edge that is parallel to the central part 21 of the second connecting arm 18.

The lower ring 4 also has a toothed part 29 in which the first end parts 19 of the connecting arms 17, 18 are housed. Therefore, the first end parts 19 extend substantially below the upper limit of the ring bottom 4 outside the connection area. Furthermore, the toothed part 29 comprises, between the two connecting arms 17, 18, a projecting part 30 projecting upwards. The protruding part 30 has a trapezoidal shape delimited by two vertical side edges that respectively face the first end part 19 of either of the two connecting arms 17, 18 and by an upper edge parallel to the central part of the first arm of connection 17.

Such an arrangement allows connection arms 17, 18 to be provided whose length is sufficient to allow the plug 3 to be disengaged from the neck 2 while limiting the dimensions of the spaces formed between the plug 3 and the lower ring 4 that can allow the passage of the dust.

In order to further protect the neck 2 of the container from dust, in the second embodiment shown in Figure 7, the toothed part 29 of the lower ring 4 has a second projecting part 31 which projects upwards and is arranged opposite the second connection arm 18. The projecting part 31 has a trapezoidal shape delimited by two vertical lateral edges and an upper edge that is parallel to the central part 21 of the second connection arm 18.

Referring to Figure 7, the geometric and dimensional characteristics of the connection device 5 are described below.

The first and second connecting arms 17, 18 respectively have a length L1 and a length L1 'which are the same. As shown in figure 7, the length L1 of the first connection arm 17 is measured, on the one hand, between the center B of the horizontal segment formed at the junction between the first end part 19 of the first connection arm 17 and the lower ring 4 and, on the other hand, the center D of the horizontal segment formed at the junction between the second end part 20 of the first connecting arm 17 and the outer peripheral skirt 11. Similarly, the length L1 'of the second connecting arm 18 is measured, on the one hand, between the center A of the horizontal segment formed at the junction between the first end part 19 of the second connecting arm 18 and the lower ring 4 and, on the other hand, the center C of the horizontal segment formed at the junction between the second end part 20 of the second connection arm 18 and the outer peripheral skirt 11. Furthermore, the two connection arms 17, 18 are identical and are separated by a constant distance, the designated length being L2 entered e points A and B equal to the designated length L2 'measured between points C and D.

To allow the stopper 3 to be disengaged from the neck 2 of the container, the lengths L1 and L1 'of the connecting arms must be greater than G / (1-sin y), being:

G: the axial dimension between the inner face of the upper wall 10 of the plug 3 and the lower end F of the series of helical ribs formed in the plug 3; and

y: the angle formed between the straight line BD and the straight line AB.

Furthermore, the connecting arms 17, 18 can be associated to some extent with a deformable quadrilateral joint, with points A, B, C and D constituting the four axes of rotation of the deformable quadrilateral joint. However, the connecting arms 17, 18 are helical in shape and therefore do not extend in a single plane like a deformable quadrilateral joint, the connecting arms not being able to remain substantially parallel to each other during the unscrewing of the plug 3 and the stresses, including torsional stresses, being exerted , on the connecting arms 17, 18 during the unscrewing of the plug 3. However, the smaller the distance between two connecting arms 17, 18, the less tension the connecting arms will suffer from each other when unscrewing the plug 3 Furthermore, the lengths L2 and L2 'measured, respectively, between points A and B and between points C and D are critical to ensure that the voltage levels that can be exerted on the two connection arms 17, 18 during unscrewing the plug 3 does not damage the connection device 5.

Furthermore, advantageously, as shown in Figure 7, the first and second connection arms 18 extend, respectively, over a certain angular sector s1 and s2, the angular sectors s1 and s2 partially overlapping. This makes it possible to limit the gap between the two connecting arms 17, 18 and, therefore, leads to limiting the stresses exerted on the connecting arms 17, 18 during the unscrewing of the plug 3.

Furthermore, the distance L2 between the two connecting arms 17, 18 satisfies the following formula:

L2 = 2V2wr - w2;

R: plug diameter 3; and

w: between 0.6 and 1 mm, more particularly between 0.7 and 0.9 mm and preferably on the order of 0.8 mm.

By way of example, the radius of the plug 3 is between 10 and 25 mm and, in particular, it can take one of the following values: 12.5 mm, 13 mm, 14 mm, 14.5 mm or 19 mm.

Thus, advantageously, the length L2 is between 6 mm and 12 mm.

Next, the assembly operations of the capping device 1 with the container, on the one hand, and the opening and closing operations of the cork 3, on the other hand, are described.

To mount the capping device 1 on the container, the stopper 1 is placed on the neck 2 simply by screwing the stopper 3 on the neck 2, until the tabs 8 formed in the lower ring 4 reach beyond the shoulder 7 delimited by the collar 6 of the neck 2. The lower ring 4 is fixed to the neck 2 being mobile in rotation around the X axis of the neck 2.

During the first unscrewing, the plug 3 leaves its closed position, illustrated in figure 1, and moves away from the lower ring 4 to a remote position, illustrated in figure 3, in which the thread 12 of the plug 3 and that of the neck 2 are decoupled. The frangible bridges 16 break during this movement. Furthermore, during this unscrewing movement of the plug 3, the lower ring 4 rotates around the X axis and the two connecting arms 17, 18 straighten as the plug 3 moves away from the lower ring 4. In other words, the angle formed between the central parts 21 of the connecting arms 17, 18 and a horizontal axis increases as the plug 3 moves away from the lower ring 4.

Subsequently, when the helical ribs of the plug 3 are disengaged from those of the neck 2, the plug 3 can be rotated back to an open inclined position, as shown in Figure 4, in which the plug 3 is released from the hole of the neck 2 so that it does not interfere with the discharge of the contents of the container. In such an open inclined position, the outer peripheral skirt extends upward from the top wall 10.

In an advantageous embodiment, the first and second end parts 19, 20 of the connecting arms 17, 18 have an area with a width less than that of the central part 21. This allows to form at the level of the first end parts and second 19, 20 of the connecting arms 17, 18 the preferred folding zones in which the connecting arms 17, 18 fold when the cap 3 rotates towards its open position. Such an arrangement makes it possible to optimize the distance between the stopper 3 and the neck hole 2 to avoid as far as possible the interference between the stopper 3 and the liquid poured from the container.

It should be noted that, for reasons of ease of representation, the first and second end parts are shown in Figures 3 and 4 in a torn state when, in fact, they are torsionally and flexibly restricted to allow movement of the plug 3 to its open leaning position.

Furthermore, in the shown embodiment, the plugging device 1 is not equipped with a locking device to lock the plug 3 in the open tilted position. Therefore, it is the user who keeps the plug 3 in the open position when the liquid content in the container flows out. This allows, on the one hand, not to disturb the consumer with an unusual locking device and, on the other hand, to simplify the structure of the plugging device 1. In particular, the plugging devices of the plug 3 of the state of the art, which are generally arranged between the two connecting arms 17, 18 of the connecting device 5, lead to a further separation between the connecting arms 17, 18 and, consequently, to the consequent increase in the stresses exerted on the connecting arms 17, 18 when opening plug 3.

The entire capping device 1 comes from a single molded piece of synthetic material, such as polyethylene, and preferably high-density polyethylene, for example. Advantageously, the capping device 1 is molded in the configuration of Figure 1, that is, in a closed position, where it can be mounted directly on the neck 2 of the container.

Although the invention has been described in relation to various particular embodiments, it is obvious that it is not limited thereto and that it comprises all the technical equivalents of the described means and their combinations as long as they are within the scope of the invention as defined. in the claims.

The use of the verb "encompass", "comprise" or "include" and its conjugated forms does not exclude the presence of other elements or stages different from those established in a claim.

In the claims, the reference signs in parentheses should not be construed as a limitation of the claim.

Claims (14)

1. Plugging device (1) intended to be fixed to a neck (2) of a container to seal a hole in said neck (2) and comprising: - a lower ring (4) intended to be mounted axially on the neck (2) and rotatable on the neck (2) about an X axis; - a plug (3) comprising an upper wall (10) intended to be arranged in the direction of the neck hole (2) and an outer peripheral skirt (11) intended to surround said neck (2), presenting the outer peripheral skirt ( 11) a helical thread (12) intended to cooperate with a helical thread (9) formed in the neck (2) of the container to allow the cap (3) to be screwed or unscrewed in the neck (2) around the X axis; and - a connection device (5) that connects the plug (3) to the lower ring (4) and is arranged to allow the plug (3) to move away from the lower ring (4) during the unscrewing of the plug (3) and thus allow the plug (3) to open; the connection device (5) comprising first and second parallel connection arms (17, 18), each of which connects the outer peripheral skirt (11) to the lower ring (4) and each comprising a central part (21) , said central part (21) presenting, in an unrestricted state corresponding to a closed position of the plug (3), a circular helical shape that develops around the X axis in a direction opposite to that of the helical thread (12) of the outer peripheral skirt (11) so that the first and second connecting arms (17, 18) straighten to allow the plug (3) to move away from the lower ring (4) when the plug (3) is unscrewed from the neck (two). A capping device (1) according to claim 1, wherein said capping device (1) is molded in one piece. 3. Capping device (1) according to claim 1 or 2, wherein the first and second connecting arms (17, 18) are separated by a distance L2 of between 6 and 12 mm. Plugging device (1) according to any of claims 1 to 3, wherein the first and second connecting arms (17, 18) respectively extend around the X axis in first and second angular sectors s (s1, s2), the first and second angular sectors (s1, s2) partially overlapping. 5. Capping device (1) according to any one of the Claims 1 to 4, wherein the first and second connecting arms (17, 18) each comprise a first end part (19) that extends from the lower ring (4) and is connected to the central part (21 ) of said connecting arm (17, 18) through a first bent part (23) and a second end part (20) that extends from the outer peripheral skirt (11) of the plug (3) and is connected to the central part (21) of said connecting arm (17, 18) by a second folded part (24). 6. Plugging device (1) according to claim 5, wherein the first and second end parts (19, 20) of the first and second connecting arms (17, 18) have an area of less width than that of the central part (21). 7. Plugging device (1) according to claim 5 or 6, in which the outer peripheral skirt (11) has a toothed part (24) and in which the second end part (20) and the central part (21 ) of the first and second connecting arms (17, 18) are housed in said toothed part (24). A capping device (1) according to claim 7, wherein the toothed part of the outer peripheral skirt (11) comprises, between the first and second connection arms (17, 18), a projecting part (28) which it projects towards the lower ring (4). 9. Plugging device (1) according to any one of claims 5 to 8, in which the lower ring (4) has a toothed part (29) and in which the first end part (19) of the first and second connecting arms (17, 18) are housed in said toothed part (29). 10. The capping device (1) according to claim 9, wherein the toothed part (29) of the lower ring (4) comprises, between the first and second connection arms (17, 18), a projecting part (30, 31) that projects towards the plug (3). 11. Plugging device (1) according to any one of claims 5 to 10, wherein the first and second connecting arms (17, 18) each have a greater length of G / (1-sin y) being: - G: an axial dimension between an inner face of the upper wall (10) of the plug (3) and a lower end of the thread of the plug (3); and - y: the angle formed between a first straight line BD and a second straight line AB, the first straight line AB connecting the center B of the horizontal segment formed in the connection between the first end part (19) of the first connection arm (17) and the lower ring (4) and the center D of the horizontal segment formed at the connection between the second end part (20) of the first connection arm (17) and the outer peripheral skirt (11) and connecting the second straight line AB to the center A of the horizontal segment formed at the junction between the first end part (19) of the second connecting arm (18) and the lower ring ( 4) and center B. 12. Plugging device (1) according to any of claims 1 to 11, wherein the lower ring (4) is connected to the outer peripheral skirt (11) by frangible bridges (16). 13. Plugging device (1) according to any one of claims 1 to 12, wherein the plug (3) comprises an inner skirt (14) extending perpendicularly downwards from the top wall (10) of the plug (3) and is intended to fit inside the neck hole (2). 14. Container equipped with a neck (2) having a hole and a thread (9), said container further comprising a plugging device (1) according to any one of claims 1 to 13, the lower ring (4) being ) of the plugging device (1) fixed axially to the neck (2) and being able to rotate around said neck (2), and the thread of the outer peripheral skirt (11) of the plug (3) cooperating with the thread of the neck (2 ).