JPH049342Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Objective of the Invention] (Industrial Application Field) The present invention relates to a container closure lid that is attached to the neck of a container such as a glass jar and closes the opening end of the neck.

(Prior art) This type of container closing lid is an integrated container closing lid in which a sealing part and a rotating part are integrally formed, and when it is attached to the neck of the container, the gasket is pressed against the opening end of the neck. By doing so, the open end of the neck of the container is closed.

(Problem to be solved by the invention) However, with the container closing lid of the above type, the gasket gets in the way of rotating the container closing lid to the proper closing position with respect to the container, so it is necessary to add lubricant to the gasket material. Therefore, a technical means has been proposed to reduce the friction force between the gasket and the open end of the neck, but in this case, the operation of attaching the container closing lid to the container is improved, but the lubricant provided in the gasket is Contaminates the contents of the container as particles or a thin film on or inside the container.

Also, even if the lubricant is compatible with the gasket material, vacuum-packing the contents or
When the crown is strongly pressed against the open end of the neck by vacuum suction force, it is not only necessary to apply sufficient twisting torque to rotate the container closing lid at the beginning of opening the container closing lid. Sufficient torque must be applied to resist the vacuum suction force to break the seal and axially separate the crown from the container.

Furthermore, a two-piece container closure lid formed by two members such as a crown with a gasket and an annular member has been proposed, but in this case, when closing the container, the annular member is removed and the container is closed. The crown must be pried from the neck and usually becomes bent or distorted so that it can no longer be reused for sealing.

The present invention was developed in view of the above points, and is a container that can be reliably sealed with a small torque, requires only a small torque when opening the lid, and allows the crown to be reused. The purpose is to provide an occlusive lid.

[Structure of the idea]

(Means for Solving the Problems) The container closure lid of the present invention has an annular member screwed onto the neck of the container, and a crown installed in the annular member to seal the open end of the container. A protective film is provided on the top surface to reduce the frictional force with the annular member, and a gasket is provided on the inner surface of the crown to seal the container opening, and the annular member is integrally connected to the upper retaining ring that presses the crown. a substantially cylindrical skirt portion, a number of protrusions radially formed on the upper surface of the upper retaining ring to increase the frictional force, and a number of protrusions that increase the gripping force on the outer peripheral surface of the skirt. A retaining pawl is provided on the upper inner surface of the skirt to engage the crown when the lid is opened, and to move the crown away from the container opening in the axial direction to open the lid, at a position where the distance from the inner surface of the upper retaining ring is greater than the axial length of the crown. formed and composed.

(Function) In the container closure lid of the present invention, the annular member is formed to be able to rotate relative to the crown when the lid is closed and when the lid is opened, and the surface of the annular member that rotates in contact with the crown when the lid is closed. The frictional connection between
The rotation of the annular member does not occur until the final stage of rotation is reached, causing axial movement of the annular member and the crown, and, upon closure, the necessary rotation or twisting of the annular member relative to the container. The annular member is formed so as to have a small initial torque so that there is no effect on separating the annular member from the container in the axial direction, and after the annular member is loosened from the container by rotation or twisting, the annular member The pawl engages the crown and applies a force to axially separate the crown.

(Example) Hereinafter, the present invention will be described with reference to an example shown in FIGS. 1 to 4.

In FIG. 1, reference numeral 10 indicates a container closing lid, and this container closing lid 10 is attached to the open end of the neck of a container 12 made of ordinary glass. This container 12
has a neck 14 as shown in FIG.
6 is formed, and the open end of the neck is formed with a closed end surface 18.
is formed.

The container closing lid 10 seals the container 12, and is formed by an annular member 20 and a crown 22. This annular member 20 is preferably molded from a molded synthetic resin material such as polypropylene, and the crown 22 is mainly formed from a metal disk.

The annular member 20 has a substantially cylindrical lower skirt portion 24, and an upper retaining ring 26 is integrally connected to the lower skirt portion 24 via a connecting corner portion 28. Above lower skirt part 2
A protrusion or screw 30 is formed on the inner circumferential surface of the neck portion 4 so as to engage with the protrusion or thread 16 of the neck portion 14 and to be able to be freely screwed together. These threads 16,
30 are screw threads that are tightened by engaging each other by a quarter turn, for example.

Further, on the outer periphery of the lower skirt portion 24, the container 1
A large number of protrusions 32 extending in the axial direction are formed over the entire circumference in order to increase the gripping force when rotating the annular member 20 relative to the annular member 20. Further, a large number of radially extending protrusions 34 are formed on the upper surface of the upper retaining ring 26 over the entire circumference.
These protrusions 34 attach the container closure lid 1 to the container 12.
0, the container closing lid 10 can be attached to the container 12 by increasing the frictional force between the surface of the pushing device that rotates while pushing the container closing lid 10 while engaging the protrusion 34. In addition, when a plurality of containers 12 are stacked and displayed when selling the contents filled in the containers 12, the protruding portion 3
4 and the bottom surface of the container 12 is increased, and the stacked containers 12 do not collapse easily.

The crown 22 consists of a thin metal (preferably steel) panel material 3 whose outer surface is coated with a protective film 38.
6. The panel material 36 has a downwardly open annular channel 40 formed around its periphery to which a gasket 42 formed of a suitable sealing material is secured. In forming this annular channel 40, the panel material 36 is bent upwardly at location 44 to form an annular upper projection 46. Further, a flange 48 is formed at the outer peripheral end of the panel member 36 and is large enough to fit inside the upper part of the skirt portion 24 . This flange 48 has a corner portion 5 sized to be received within the joining corner portion 28 of the annular member 20.
0 to the annular upper protrusion 46.

The protective film 38 of the crown 22 reduces the frictional force when the annular member 20 joins with the lower surface of the upper retaining ring 26, so that the annular member 20 and the crown 22 rotate relative to each other with minimal frictional force.

Further, in order to maintain the combined state of the annular member 20 and the crown 22, a plurality of retaining pawls 52, 52 are provided above the thread 30 on the inner circumferential surface of the skirt portion 24 in a protruding manner. Although the retaining pawl 52 is shown in FIG. 2 as having a plurality of protrusions 54 arranged around the entire circumference, it may be formed continuously over the entire circumference.

The attachment of the crown 22 to the annular member 20 is performed by attaching the crown 22 to the annular member 20.
is pushed up through its corner portion 50 elastically over the retaining pawl 52 and loaded with a snapping sound. As a result, the lower free end of the flange 48 abuts against the upper surface of the retaining pawl 52, preventing it from coming off downward and preventing the crown 22 from separating from the annular member 20.

Further, since the retaining pawl 52 is arranged at a certain distance in the axial direction from the lower free end of the flange 48, the crown 22 can move relative to the annular member 20 by a limited distance in the axial direction.

Next, the operation of the container closing lid 10 will be explained.

When the crown 22 is assembled into the annular member 20, the annular upper projection 46 of the crown 22 is attached to the upper retaining ring 2.
It is not yet firmly engaged with the lower surface of 6 and is in a state where it can move to some extent. Thereafter, the neck 14 of the container 12
When the container closing lid 10 is screwed in by turning the annular member 20, the crown 22 is attached to the gasket 4.
2 rotates with the annular member 20 until it contacts the closed end surface 18 of the neck 14. After the rotation of the crown 22 is stopped due to this contact, the annular member 2
0 rotates without frictional resistance and the gasket 42
is gradually compressed and stops when the upper retaining ring 26 strongly compresses the annular upper protrusion 46 of the crown in the axial direction. That is, at this time, a resistance force opposing the rotation of the annular member 20 with respect to the crown 22 acts. However, this resistance force is relatively small compared to the coefficient of friction between one surface of the annular member 20 and the crown 22. As a result, as shown in FIG. 2, the gasket 42 and the closed end surface 18 come into close contact, and the container
2 is sealed.

To remove container closure lid 10 from container 12,
As can be seen by comparing FIGS. 2 and 3, when a rotational torque in the opening direction is applied to the annular member 20, the annular member 20 rotates relative to the neck 14 and the crown 22, and at the same time 16 and 30 causes the annular member 20 to move axially upward relative to the neck 14 and crown 22 such that the pawl 52 abuts the lower free end of the flange 48 of the crown 22. At this time, since the annular member 20 does not rotate together with the crown 22, a torque is initially required to overcome the engagement restraining torque between the gasket 42 and the sealed end surface 18.

However, the gasket 4 is removed from the sealed end face 18.
A certain amount of separation force is required to separate the two in the axial direction. Particularly, separation forces are required when the container 12 is vacuum packed or when a vacuum suction force is applied to the crown 22 to prevent it from axially separating from the neck 14.

After the retaining pawl 52 comes into contact with the lower free end of the flange 48, the annular member 20 is further rotated with momentum to separate the crown 22 from the sealed end surface 18. The force required at this time may be the addition of a small amount of separation torque. Moreover, this separation is smaller than the amount of separation torque required to open the integral container closure lid in which the crown and the annular member are integrated.
Once the crown 22 is separated from the closure end face 18, the crown 22 is free to move axially together with the annular member 20, completing the opening of the container closure lid 10.

Since the gasket 42 and the neck portion 14 do not rotate relative to each other when the lid is opened, there is no need to contain lubricant in the gasket 42 in advance.

Forming the crown 22 and the annular member 20 separately provides the following advantages. The crown is integrated with the annular member so that when the container closure lid is sufficiently closed and then opened, an opening force is generated inside the container as a reaction to loosen the container closure lid,
When the gasket-forming member is secured for rotation with the skirt, it is configured to create torsional forces within the gasket area and within the skirt when the crown is tightened onto the container. By forming the crown and gasket material separately from the annular member, and by minimizing the frictional forces between the crown and the annular member, even if the gasket member has no lubricant and is Even if there is a tendency to stick, the roll-up forces generated in the container closure lid are reduced, which is of practical benefit.

Furthermore, since the crown 22 is automatically opened by the annular member 20 without being distorted, the container closing lid 1 can be opened automatically.
The crown 22 can reseal the container 12 when the container 12 is reclosed.

The thin metal panel material 36 is also provided in the form of a conventional vacuum actuated button (not shown).

The present invention is not limited to the embodiments described above, and can be modified as appropriate depending on design conditions and the like.

[Effect of idea]

In this way, the container closing lid of the present invention can reliably seal the container with a small torque, requires only a small torque when opening the lid, allows the crown to be reused, and has an upper retaining ring on the annular member. Since a large number of protrusions are provided on the top surface of the container, it is easy to close the lid, and the containers are less likely to collapse when stacked on top of each other.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of the container closing lid according to the present invention, Fig. 2 is an enlarged sectional view taken along line 2-2 in Fig. 1, and Fig. 3 shows the stopper claw contacting the flange of the crown when the lid is closed. FIG. 4 is a sectional view similar to FIG. 2 showing the closed state, and FIG. 4 is a view similar to FIG. 2 showing the lid closed. 10... Container closing lid, 12... Container, 14...
Neck, 20... Annular member, 22... Crown, 24...
...Lower skirt portion, 26...Upper retaining ring, 3
2, 34... protrusion, 36... thin metal panel material,
38... Protective film, 40... Annular channel, 42
... Gasket, 48 ... Flange, 52 ... Stopper.

Claims (1)

[Scope of utility model registration request] It has an annular member that is screwed onto the neck of the container, and a crown that is installed inside the annular member and seals the open end of the container, and a protective film is provided on the upper surface of the crown to reduce the frictional force with the annular member, and A gasket for sealing the container opening is provided on the inner surface of the crown, and the annular member includes an upper retaining ring that presses against the crown and a substantially cylindrical skirt integrally connected to the upper retaining ring. A large number of protrusions are formed radially to increase the frictional force, a large number of protrusions are formed on the outer circumferential surface of the skirt to increase the gripping force, and a large number of protrusions are formed on the upper inner surface of the skirt to engage with the crown when the lid is opened. A container closing lid characterized in that a retaining claw for opening the lid axially away from the container opening is formed at a position where the distance from the inner surface of the upper retaining ring is greater than the axial length of the crown.