ES2973096T3 - Capping device for the neck of a container - Google Patents

Abstract

The invention relates to a capping device intended to be fixed to a neck (2) of a container that includes a hooking collar (4), the capping device including: - a cap (1); - a lower ring (9) axially fixed to the neck (2); - an articulation device (10) that joins the plug (1) with a second sector (17) of the lower ring (9); - the lower ring (9) has hooking elements (18) only in two hooking areas (20, 21) to allow a radial movement of the lower ring (9) from front to back to facilitate the passage of a part of the second sector (17) on each side of the coupling collar (5) during the movement of the second sector (17) between a lowered position and a released position.

Description

DESCRIPTION

Capping device for the neck of a container

Technical field

The present invention relates to a capping device that is equipped with a cap and allows said cap to be kept fixed to the neck of a container, which avoids completely losing the cap.

Technological background

Document ES1232089U discloses a capping device that includes a lower ring intended to be fixed axially in the neck of a container, a cap that includes a thread intended to engage a complementary thread formed in the neck of the container and a joint that joins the cap. with the lower ring. The lower ring includes hooking means provided to retain the lower ring with the neck of the container. The section of the diameter of the lower ring on which there is engaging means extends between 25 and 75% of the diameter of the lower ring. The section of the lower ring that is connected to the cap by the hinge device lacks engaging means which allows said section to rotate between a lowered position and a raised position, in particular to allow the cap to be unscrewed. Furthermore, the cap includes ratchet means intended to cooperate with the complementary ratchet means formed in the lower ring and, therefore, allows the cap to be maintained in a tilted open position.

This capping device is not completely satisfactory. Indeed, despite the absence of engaging means on the lower ring section that is connected to the plug by the hinge, manipulations of the plug to allow the lower ring section that is connected to the plug to rotate towards a raised position when The cap must be moved from the tilted open position to the closed position, which is not easy.

Summary

An underlying idea of the invention is to propose a capping device that allows a cap to be kept attached to the neck of the container that is reliable, easy to make and use.

According to one embodiment, the invention provides a capping device intended to be fixed to the neck of a container that includes a hole and a locking collar, the capping device including:

- a cap including a top wall and an external peripheral skirt, the external peripheral skirt having a helical thread intended to cooperate with a helical thread formed in the neck to allow:

• unscrewing the cap about an with the neck; and

• screw cap into the neck to move the cap from the released position to the closed position;

- a lower ring fixed axially to the neck and movable in rotation on the neck around said X axis, said lower ring including a first sector that includes hooking elements that project radially towards the interior of the lower ring and are intended to be arranged below of the engagement collar to axially retain the lower ring in the neck of the container and a second sector, the first sector and the second sector of the lower ring are hinged together so that the second sector rotates with respect to the first sector between a lowered position wherein the second sector is intended to be disposed below the engagement collar and a raised position in which the second sector is intended to be disposed at least partially above the engagement collar;

- a hinge device that joins the cap to the second sector of the lower ring and is configured to allow the cap to rotate between the released position and a tilted open position in which the cap is released from the neck hole;

- the lower ring is configured so that the second sector rotates with respect to the first sector from the lowered position to the raised position when the plug moves from the closed position to the released position and from the raised position to the lowered position when the plug moves from the released position to the tilted open position;

- the first sector of the lower ring including a front area that is diametrically opposite to the second sector and two hooking areas that are each arranged between the front area of the first sector and the second sector, the hooking elements are arranged only in the two hooking areas to allow a radial movement of the lower ring capable of facilitating the passage of a part of the second sector to each side of the hooking collar during the movement of the second sector between the lowered position and the released position.

In this way, the tensile forces that will be exerted on the lower ring to allow the second sector to move between the lowered position and the raised position are lower, which facilitates the use of the capping device.

According to other advantageous embodiments, a capping device of this type may have one or more of the following characteristics.

According to one embodiment, the second sector does not have hooking elements.

According to one embodiment, the front area of the first sector lacks hooking elements.

According to one embodiment, the hooking elements are protuberances that project radially inwards.

According to one embodiment, the second sector extends over an angular interval between 90 and 150°.

According to one embodiment, the front area of the second sector extends over an angular range between 90 and 150°.

According to one embodiment, each of the two hooking areas extends over an angular range of between 30 and 90°.

According to one embodiment, the articulation device extends over an angular sector that is cut into two equal parts by a bisector plane Pb, the two engaging areas extend over angular sectors that are symmetrical with respect to the bisector plane Pb. .

According to one embodiment, the articulation device extends over an angular sector that is cut into two equal parts by a bisector plane Pb and the helical thread formed in the external peripheral skirt of the cap develops around the axis and has a lower end and an upper end, the lower end of the helical thread being arranged in a second angular sector defined between the bisector plane Pb and a radial plane placed at 160° from the bisector plane Pb according to a second direction opposite to the first. address. This facilitates engagement of the cap into the neck when moving the cap from the tilted open position to the closed position.

According to one embodiment, the lower end of the helical thread is arranged in an angular sector defined between two radial planes, respectively, positioned at 90° and 160° to the bisector plane Pb according to the second direction of rotation.

According to one embodiment, the hinge device includes two sheets and the capping device also includes a device for locking the cap in the tilted open position, said locking device including a stop formed on the outer peripheral skirt, between the two sheets. of the hinge device, and which is configured to rest against the neck of the container when the cap is in the tilted open position, the heel has an internal face on which at least one rib of the helical thread is formed. This allows the pressure resistance of the capping device to be improved.

According to one embodiment, the invention also relates to an assembly comprising a container equipped with a neck that includes a hole, a locking collar and a helical thread and a capping device mentioned above, the lower ring being fixed axially to the neck and being mobile in rotation on the neck around said X axis.

According to one embodiment, the capping device further includes a locking device configured to lock the cap in the tilted open position, said locking device including a stop that projects radially outwardly from the cap and is configured to abut against the neck engagement collar during the movement of the cap from the open tilted position towards the released position to exert in the second sector, a tensile force that has a component directed radially outwards and a component directed axially upwards to assist the movement of the second sector from the lowered position to the raised position. This makes it possible to further facilitate the use of the capping device, in particular, when the cap must be moved from the tilted open position to the closed position.

According to one embodiment, the stop is configured so that, during movement of the cap from the released position to the tilted open position, the stop rests against an upper end of the second sector of the lower ring to move the second sector from the position raised to the lowered position. This also makes it easier to use the capping device.

According to one embodiment, the locking device further includes a bead formed on the outer peripheral skirt of the cap and extending axially, the bead being configured to abut against a helical rib of the helical thread formed in the neck of the container during locking. movement of the cap from the tilted open position to the released position to exert on the second sector a tensile force that has a component directed radially outward and a component directed axially upward to assist the movement of the second sector from the lowered position towards the raised position.

According to one embodiment, the articulation device includes two sheets and the bead is formed between the two sheets.

According to one embodiment, the stop protrudes radially towards the outside of the heel.

Brief description of the figures

The invention will be better understood and other purposes, details, features and advantages thereof will become more apparent in the following description of several particular embodiments of the invention, given solely by way of illustration and not by way of limitation, with reference to the drawings attached.

Figure 1 is a three-quarter perspective view of a capping device.

Figure 2 is a sectional view of a container neck intended to receive the capping device of Figure 1.

Figure 3 is a side view of the capping device mounted on the neck of the container and showing the cap of the capping device in a released position where it is no longer engaged with the neck of the container.

Figure 4 is a perspective view of the capping device mounted on the neck of the container and showing the cap of the capping device in a tilted open position in which the cap is released from the neck hole.

Figure 5 is a side perspective view of the capping device.

Figure 6 is another side perspective view of the capping device.

Figure 7 is a rear perspective view of the capping device.

Figure 8 is a front perspective view of the capping device.

Figure 9 is a sectional view of the capping device mounted on the neck of the container and showing the cap of the capping device in a tilted open position in which the cap is released from the neck hole.

Figure 10 is a sectional view of the capping device mounted on the neck of the container and showing the cap of the capping device in a position intermediate between the released position and the tilted open position.

Figure 11 is a perspective view of the capping device mounted on the neck of the container and showing the cap of the capping device in the tilted open position.

Detailed description of the embodiments

In the description and figures, the X axis corresponds to the axis of rotation of the cap 1 of the capping device when it is screwed into the neck 2 of the container. By convention, "radial" orientation is directed orthogonally to the X axis and axial orientation is directed parallel to the With reference to the X axis, an element close to the X axis is thus classified as internal as opposed to an external element located radially on the periphery.

The terms "upper" and "lower" are used to define the relative position of one element with respect to another by reference to a position in which the hole 3 of the neck 2 is oriented upwards and the cap 1 is in the closed position in the neck 2 of the container, being called an element intended to be placed lower, lower, and being called, an element intended to be placed higher, upper. The terms "front" and "behind" are used to define the relative position of one element with respect to another along a diameter perpendicular to the comprising a capping device, shown in particular in Figure 1, and a container equipped with a neck 2, shown in particular in Figure 2.

As shown in Figure 2, the neck 2 of the container has an upper end in which a hole 3 is formed that allows the contents of the container to be poured. The neck 2 of the container includes a support collar 4 that projects radially outward and an engagement collar 5 that also projects radially outward and is arranged axially between the support collar 4 and the hole 3. A portion cylindrical formed axially between the support collar 4 and the hole 3. On the other hand, the neck 2 includes, placed axially between the coupling collar 5 and the hole 3, a helical thread 6 formed by a series of helical ribs, projecting radially outwardly from an external surface of the neck 2. The helical thread 6 is intended to cooperate with a complementary helical thread 7 formed from a series of helical ribs that are formed in the cap 1 of the capping device.

According to one embodiment, the helical thread 6 formed in the neck 2, as well as the helical thread 7 formed in the cap 1, are interrupted. In other words, the adjacent helical ribs are separated by a space that forms a vent and which allows, in particular, to evacuate the gas present inside the container while the cap 1 is still attached to the neck 2.

The capping device includes a lower ring 9 that is retained in the neck 2 of the container, a cap 1 that is intended to cover the hole 3 of the container in order to seal it, a joint device 10 that joins the cap 1 with the lower ring 9 and a locking device positioned to lock the cap 1 in an open tilted position, shown in figures 4, 9 and 11. In the open tilted position, the cap 1 is decoupled from the hole 3 of the container and does not hinder pouring the contents of the container.

As illustrated in Figures 7 and 8, the hinge device 10 extends over an angular interval S1 which is cut into two equal parts by a vertical bisector plane Pb.

Returning to Figure 1, it is observed that the cap 1 includes an upper wall 13 intended to be arranged substantially and orthogonally to the X axis, in front of the hole 3 of the neck 2 when said cap 1 is in the closed position. The cap 1 further includes an external peripheral skirt 14 intended to surround the neck 2 of the container when the cap 1 is in the closed position. The external peripheral skirt 14 extends, downward, perpendicular to the upper wall 13, from the external periphery of said upper wall 13.

The external peripheral skirt 14 has, on its internal face, a helical thread 7, visible in Figures 2 and 5 to 7, formed by a series of helical ribs that extend around the X axis according to a first direction of rotation. The helical thread 7 is intended to cooperate with the helical thread 6 formed on the external surface of the neck 2. In this way, the cap 1 is suitable for screwing into the neck 2 in order to close the container and for unscrewing from the neck 2. in order to open the container. The cap 1 can thus be moved between a closed position and a released position, shown in Figure 3. In said released position, the cap 1 is no longer engaged with the neck 2. Therefore, it is capable of swinging towards the open tilted position, represented in figures 4, 9 and 11, in which the plug 1 is removed from the hole 3 of the neck 2 so that it does not hinder the pouring of the contents of the container.

As shown in particular in Figure 9, the cap 1 also includes an internal skirt 8, which extends perpendicularly downward from the upper wall 13 of the cap 1 and is sized to be inserted inside the hole 3 of the neck 2. The Cap 1 also includes an annular lip 15 that extends, from the top wall 13, radially between the inner skirt 8 and the outer peripheral skirt 14. The inner skirt 8 and the annular lip 15 are sized so that, when the cap 1 is in the closed position, in the neck 2 of the container, the internal skirt 8 is in contact against the internal face of the neck 2 while the annular lip 15 is in contact against the external face of the neck 2. In this way, the skirt internal 8 and the annular lip 15 ensure the tightness of the closure.

Advantageously, the lower ring 9 is, before the first opening of the container, connected to the cap 1 by frangible bridges, not visible in the figures, intended to break during the opening of the cap 1. These frangible bridges thus constitute some inviolability seals.

The lower ring 9 is held axially in the neck 2 of the container while it can rotate with respect to it around the axis a first sector 16 and a second sector 17 by which the lower ring 9 is connected to the plug 1 by means of the joint device 10.

According to one embodiment, the lower ring 9 includes two narrowed zones, that is, whose radial thickness is less than the radial thickness of the lower ring 9 outside said narrowed zones. The two narrowed areas delimit the first sector 16 and the second sector 17. The narrowed areas thus form pivots that allow the articulation of the second sector 17 with respect to the first sector 16.

According to another embodiment, the lower ring 9 does not have narrowed areas that delimit the first and second sectors 16, 17.

The second sector 17 is capable of rotating upwards with respect to the first sector 16, between a lowered position in which the second sector 17 is intended to be arranged below the coupling collar 5 and a raised position, in which the second sector 17 is arranged at least partly above the coupling collar 5. This allows the cap 1 to move upwards with respect to the neck 2 of the container, until the helical thread 7 of the cap 1 is disengaged from the helical thread 6 formed in the neck 2 of the container. In other words, when the plug 1 is unscrewed, the lower ring 9 is dragged in rotation around the upward of the cap 1, from the closed position, to the released position, shown in Figure 3. When the cap 1 rotates from the released position to the tilted open position, the second sector 17 of the lower ring 9 rotates in the direction opposite with respect to the first sector 16 and then returns to the lowered position. Furthermore, as described in more detail below, the second sector 17 also rotates with respect to the first sector 16 from the lowered position to the raised position when the plug 1 rotates from the tilted open position to the released position.

The lower ring 9 is held axially in the neck 2 of the container by means of the coupling collar 5, in particular visible in figures 5 to 7. The coupling collar 5 has a truncated conical external surface that tapers upwards, i.e. , in the direction of hole 3 of the container. The coupling collar 5 delimits, downwards, that is, in a direction opposite to the hole 3, a projection. The first sector 16 of the lower ring 9 includes hooking elements 18 that cooperate with the hooking collar 5 formed in the container in order to axially retain the lower ring 9 to the neck 2 of the container. The engaging elements 18 are protuberances, shown in detail in particular in Figures 5 and 6, which project radially inwards from the first sector 16 of the lower ring 9. The retaining elements 18 have a radial dimension that increases, from below upward, i.e. in the direction of the upper edge of the lower ring 9. During the assembly of the capping device on the neck 2 of the container, the hooking elements 18 slide against the frusto-conical surface of the hooking collar 5 and then lock by means of an elastic return behind the coupling collar 5.

As shown in Figures 5 and 6, the first sector 16 of the lower ring 9 includes a front area 19 that is diametrically opposite to the second sector 17 of the lower ring 9 and two engagement areas 20, 21 that are arranged on each side of the front area 19 and are each arranged between the front area 19 and the second sector 17 of the lower ring 9. The hooking elements 18 are only arranged in the two hooking areas 20, 21. Thus, due to the absence of hooking elements 18 in the front area of the first sector 16, there is a radial space between the lower ring 9 and the neck 2 that allows the lower ring 9 to move from front to back and vice versa. The radial clearance between the lower ring 9 and the collar 2 in the front/rear direction is, for example, between 0.5 and 1 mm. This facilitates the passage of a part of the second sector 17 to each side of the engagement collar 5 during the movement of the second sector 17 between the lowered position and the raised position. In other words, the tensile forces that will be exerted on the lower ring 9 to allow the second sector 17 to pass to each side of the coupling collar 5 are lower.

Advantageously, the second sector 17 extends over an angular range between 90 and 150°, and for example, of the order of 120°, the front area of the second sector 16 extends over an angular range between 90 and 150°. , for example, of the order of 120°, while each of the two engagement areas 20, 21 extends over an angular interval between 30 and 90°, for example, of the order of 60°.

On the other hand, the bisector plane Pb cuts the second sector 17, as well as the front part of the second sector 17, into two equal parts. The angular intervals corresponding to the two engagement areas 20, 21 are, therefore, symmetrical to each other. with respect to the bisector plane Pb.

The hinge device 10 is configured to allow the cap 1 to rotate between the released position, shown in Figure 3, in which the outer peripheral skirt 14 extends downward from the upper wall 13 of the cap 1, and the tilted position open, shown in Figures 4, 9 and 11, in which the external peripheral skirt 14 extends upwardly from the upper wall 13 of the cap 1. In the illustrated embodiment, the hinge device 10 includes two sheets 11, 12, particularly visible in Figure 4, which join the plug 1 and, more particularly, the external peripheral skirt 14 of the plug 1 with the lower ring 9, and more particularly, with the second sector 17 of the lower ring 9. The two sheets 11, 12 are symmetrical with respect to the bisector plane Pb.

The locking device includes a bead 22, in particular visible in Figure 1, formed on the outer peripheral skirt 14 of the cap 1. The bead 22 is arranged between the two sheets 11, 12. The lower end of the bead 22 is located advantageously at the same height as the lower end of the outer peripheral skirt 14. The bead 22 includes a stop 23 extending circumferentially about the X axis and projecting radially outward from the bead 22.

During the movement of the cap 1 from the released position towards the open tilted position, the stop 23 rests against the upper end of the second sector 17 of the lower ring 9 which tends to return said second sector 17 towards the lowered position.

On the other hand, during the movement of the cap 1 from the open tilted position towards the released position, at first, the stop 23 rests against the coupling collar 5, as shown in Figure 10, to exert on the second sector 17 of the lower ring 9 a tensile force having a component directed radially outwards and a component directed axially upwards. This makes it possible to move the lower ring 9 from front to back to press the front area 19 of the first sector 16 of the lower ring 9 against the neck 2 of the container in order to facilitate the movement of the second sector 17 towards the raised position. This also makes it possible to assist the movement of the second sector 17 between the lowered position and the raised position.

Then, as shown in Figure 10, during the movement of the plug 1 from the open tilted position towards the released position, the outer surface of the heel 22, at a second moment, rests against the upper surface of a helical rib of the helical thread 6 formed in the neck 2 of the container, which also makes it possible to exert on the second sector 17 a traction force that has a component directed radially outwards and a component directed upwards to move the second sector 17 towards the raised position .

On the other hand, as shown in Figure 11, the lower end 24 of the helical thread 7 formed on the inner face of the external peripheral skirt 14, that is, the beginning of the helical thread 7, is arranged in an angular interval S2 defined between the bisector plane Pb and a radial plane Pr located at 160° from the bisector plane Pb according to a second direction opposite to the first direction of rotation, that is, in the direction of rotation of the helical thread 7 around the X axis. In this way, a lower front part 25 of the outer peripheral skirt 14 lacks a helical thread 7, which makes it easier to attach the cap 1 to the neck 2 of the container. This arrangement is particularly advantageous when the cap 1 is capable of being presented in a position slightly displaced backwards when it comes into contact with the neck 2 of the container. This is particularly the case when the engaging elements 18 are absent from the front area 19 of the first sector 16 and, consequently, the lower ring 9 can move radially from front to rear with respect to the neck 2 of the container.

Advantageously, the lower end of the helical thread 7 is arranged in a defined angular interval between two radial planes respectively positioned at 90° and 160° from the bisector plane Pb according to a second direction of rotation opposite to the direction of the helical thread 7. of plug 1.

On the other hand, as schematically represented in Figures 8, 9 and 10, at least one of the ribs of the series of ribs of the helical thread 7 is formed on the inner face of the heel 22. In other words, at least one of the ribs of the helical thread 7 is formed between the two sheets 11, 12 of the articulation device 10. The presence of said rib formed in the heel 22 allows the pressure resistance of the helical thread 7 to be increased and, therefore Therefore, it prevents the cap 1 from opening involuntarily due to excessive pressure in the container, in particular, when it is intended to receive carbonated drinks.

The kinematics of plug 1 are as follows. During the first unscrewing, the cap 1 leaves the closed position and moves away from the lower ring 9 to the released position, illustrated in Figure 3. The frangible bridges break during this movement. Furthermore, during this unscrewing movement of the cap 1, the lower ring 9 is dragged in rotation around the .

Subsequently, the cap 1 can then be rotated backwards in the direction of the open tilted position in which the outer peripheral skirt 14 extends upward from the upper wall 13. During the movement of the cap 1 backwards in the direction of its position When tilted open, the stop 23 rests against the upper end of the second sector 17 of the lower ring 9, so that the second sector 17 of the lower ring 9 rotates from the raised position to the lowered position.

As shown in Figure 9, when the second sector 17 of the lower ring 9 is in the lowered position and the plug 1 is in its tilted open position, the stop 23 is supported against the coupling collar 5. In this way, the cap 1 remains in its tilted open position since, due to this support of the stop 23 against the coupling collar 5, the cap 1 cannot rotate towards the released position in which the cap 1 is facing the distribution hole 3 while the second sector 17 of the lower ring 9 remains in the lowered position. This makes it possible to increase the minimum opening angle of the cap 1. Thus, advantageously, when the cap 1 is in its tilted open position and the second sector 17 of the lower ring 9 is in the lowered position, the opening angle of the plug 1 is greater than 120° and, advantageously, greater than or equal to 145° and, for example, of the order of 180°. The opening angle corresponds to the projecting angular sector that is formed at the intersection between a plane parallel to the upper wall 13 of the plug 1 and a horizontal plane.

To close cap 1 again, the user tilts cap 1 forward to the released position. During this tilting, the stop 23 rests against the coupling collar 5 to exert on the second sector 17 of the lower ring 9 a traction force that has a component directed radially outwards that makes it possible to move the lower ring 9 from front to back. rear and a component directed axially upwards that helps to assist the movement of the second sector 17 of the lower ring 9 towards the raised position. The outer surface of the bead 22 also bears against a helical rib of the helical thread 6 which also facilitates the movement of the second sector 17 of the lower ring 9 towards the raised position.

When the second sector 17 is in the raised position and the cap 1 is in the released position, said cap 1 can then be screwed back into the neck 2 of the container. During screwing, the lower ring 9 is driven in rotation around the

Advantageously, the capping device assembly is molded in a single piece of synthetic material, such as polyethylene and advantageously high-density polyethylene. Advantageously, the capping device is molded in the configuration of Figure 1, that is, in a closed position, a position in which it can be mounted directly on the neck 2 of the container.

Although the invention has been described in relation to several particular embodiments, it is more than evident that it is not limited in any way by them and that it includes all the technical equivalents of the described means, as well as their combinations if these come into play. the framework of the invention as defined by the claims.

The use of the verb "consist of", "understand" or "include" and its conjugated forms do not exclude the presence of other elements or stages other than those established in a claim.

In the claims, any parenthetical reference sign is not to be construed as a limitation of the claim.

Claims (14)

1. Capping device intended to be fixed to the neck (2) of a container that includes a hole (3) and a locking collar (4), including the capping device: - a plug (1) that includes an upper wall (13) and an external peripheral skirt (14), the external peripheral skirt (14) having a helical thread (7) intended to cooperate with a helical thread (6) formed in the neck (2) to allow: • unscrew the cap (1) around an axis 14) surrounds said neck (2) towards a released position in which the plug (1) is no longer engaged with the neck (2); and • screw the cap (1) into the neck (2) to move the cap (1) from the released position to the closed position; - a lower ring (9) axially fixed to the neck (2) and mobile in rotation on the neck (2) around said X axis, said lower ring (9) including a first sector (16) that includes hooking elements (18). ) that project radially into the lower ring (9) and are intended to be arranged below the coupling collar (5) to axially retain the lower ring (9) in the neck (2) of the container and a second sector (17 ), the first sector (16) and the second sector (17) of the lower ring (9) being articulated with each other so that the second sector (17) rotates with respect to the first sector (16) between a lowered position in which the second sector (17) is intended to be arranged below the coupling collar (5) and a raised position in which the second sector (17) is intended to be arranged at least partially above the coupling collar (5); - a hinge device (10) that joins the plug (1) to the second sector (17) of the lower ring (9) and is configured to allow the plug (1) to rotate between the released position and an open tilted position in the that the plug (1) is released from the hole (3) of the neck (2); - the lower ring (9) being configured so that the second sector (17) rotates with respect to the first sector (16) from the lowered position to the raised position during the movement of the cap (1) from the closed position towards the released position and from the raised position to the lowered position during the movement of the plug (1) from the released position to the tilted open position; - including the first sector (16) of the lower ring (9), a front area (19) that is diametrically opposite to the second sector (17) and two hooking areas (20, 21) that are each arranged between the front area ( 19) of the first sector (16) and the second sector (17), The capping device being characterized in that the hooking elements (18) are arranged only in the two hooking areas (20, 21) to allow a radial movement of the lower ring (9) capable of facilitating the passage of a part of the second sector (17). on each side of the coupling collar (5) during the movement of the second sector (17) between the lowered position and the released position. 2. Capping device according to claim 1, wherein the hooking elements (18) are protuberances that project radially inwards. 3. Capping device according to claim 1 or 2, wherein the second sector (17) extends over an angular range between 90 and 150°. 4. Capping device according to any one of claims 1 to 3, wherein the front area (19) of the first sector (16) extends over an angular range between 90 and 150°. 5. Capping device according to any one of claims 1 to 4, wherein each of the two hooking areas (20, 21) extends over an angular range between 30 and 90°. 6. Capping device according to any one of claims 1 to 5, wherein the articulation device (10) extends over a first angular interval that is cut into two equal parts by a bisector plane Pb, the two areas of hook (20, 21) on angular sectors that are symmetrical to each other with respect to the bisector plane Pb. 7. Capping device according to any one of claims 1 to 6, wherein the joint device (10) extends over a first angular interval that is cut into two equal parts by a bisector plane Pb and in which the thread helical thread (7) formed in the external peripheral skirt (14) of the plug (1) develops around the X axis in a first direction and has a lower end and an upper end, the lower end of the helical thread (7) being arranged in a second angular interval defined between the bisector plane Pb and a radial plane placed at 160° to the bisector plane Pb according to a second direction opposite to the first direction. 8. Capping device according to claim 7, wherein the lower end of the helical thread <(>7<)> is arranged in a defined angular interval between two radial planes, respectively, positioned at 90° and 160° from the plane Pb bisector according to the second direction of rotation. 9. Assembly comprising a container equipped with a neck (2) that includes a distribution orifice (3), a coupling collar (5) and a helical thread (6) and a capping device according to any one of claims 1 at 8, the lower ring (9) being axially fixed to the neck (2) and moving in rotation on the neck (2) around said X axis. 10. Assembly according to claim 9, wherein the capping device further includes a locking device configured to lock the cap (1) in the tilted open position, said locking device including a stop (23) that projects radially towards the outside of the cap (1) and is configured to rest against the hooking collar (5) of the neck (2) during the movement of the cap (1) from the open tilted position towards the released position to exert on the second sector (17 ) a tensile force having a component directed radially outward and a component directed axially upward to assist the movement of the second sector (17) between the lowered position towards the raised position. 11. Assembly according to claim 10, wherein the stop (23) is configured so that, during movement of the cap (1) from the released position to the tilted open position, the stop (23) rests against an upper end of the second sector (17) of the lower ring (9) to move it from the raised position to the lowered position. 12. Assembly according to claim 10 or 11, wherein the locking device further includes a bead (22) formed in the external peripheral skirt (14) of the plug (1) and extending axially, the bead (22) being configured to rest against a helical rib of the helical thread (6) formed in the neck (2) of the container during the movement of the cap (1) from the open tilted position towards the released position to exert on the second sector (17 ) a tensile force having a component directed radially outward and a component directed axially upward to assist the movement of the second sector (17) from the lowered position to the raised position. 13. Assembly according to claim 12, wherein the articulation device (10) includes two sheets (11, 12) and wherein the bead (22) is formed between the two sheets (11, 12). 14. Assembly according to claim 12 or 13, wherein the stop (23) projects radially outward from the heel (22).