JPH02242754A - Composite container lid - Google Patents

Abstract

PURPOSE:To permit a neck part to be opened extremely easily all the time by forming at least a pair of tear lines on the skirt wall of an outer lid and a joint between the upper surface of a joint ring in connection with the outer peripheral edge of flange wall and the inner surface of a top wall of the outer lid by a plurality of bridging parts spaced at intervals around the periphery of an inner stopper. CONSTITUTION:When a grip piece 12 is pulled outwardly in a radial direction, a skirt wall 10 is torn along first tear lines 14 formed thereon and, when pulled upward, it is torn along second tear lines 16 formed thereon. When at least half of the circumference of the skirt wall 10 is disengaged from a locking projection 34 of a neck part 32, an outer lid 4 is released from and moved out of engagement with the neck part 32. As a joint ring 30 is moved upward and separated from the neck part 32, it is also separated from an inner stopper 6 and the other parts. This permits an extremely easy opening of the neck part.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a composite container lid composed of a combination of an outer lid and an inner stopper made of synthetic resin.

[Prior art]

Traditionally, it has been used as a container lid for containers such as beverage bottles.
Japanese Unexamined Patent Publication No. 63-33263, Utility Model Application No. 57-1863
As disclosed in Japanese Utility Model Publication No. 57, Japanese Utility Model Publication No. 41-17428, and Japanese Utility Model Publication No. 40-27112, composite container lids have been proposed that are composed of a combination of an outer lid and an inner stopper.

The outer cover made of a thin metal plate or synthetic resin has a circular top wall and a cylindrical skirt wall that hangs down from the periphery of the top wall. A ridge is formed. On the other hand, the inner plug, which can be formed from a synthetic resin, includes a cylindrical fitting wall, an annular flange wall extending radially outward from the upper end of the fitting wall, and a plurality of circumferentially spaced apart walls. The locking ring is connected to the outer peripheral edge of the flange wall via a plurality of bridges. The locking ring is positioned radially outwardly of the flange wall and projects upwardly beyond the top surface of the flange wall. The outer diameter of the locking ring is slightly larger than the inner diameter of the annular protrusion on the outer cover.The inner stopper is inserted into the outer cover, and the locking ring of the inner stopper is elastically deformed to form the annular shape of the outer cover. By passing the protrusion, the inner stopper is integrally assembled with the outer cover.

When attaching the composite container lid to the mouth and neck of the container to seal the mouth and neck, the composite container lid is fitted onto the mouth and neck and lowered.

In this way, the fitting wall of the inner stopper is fitted into the neck of the container, and the flange wall of the inner stopper is brought into close contact with the top surface of the neck. In addition, in the inner stopper, the locking ring is lowered relative to the flange until the top surface of the locking ring is at the same height as the top surface of the flange, and as a result, a plurality of bridge portions are broken. The locking ring is separated from the flange.

When opening the neck of the container, remove the outer lid from the neck according to the required method. In this way, the locking ring of the inner stopper, which has been separated from the flange due to the breakage of the bridging portion, is also removed from the mouth and neck along with the outer cover. After that, if necessary, the main part of the inner stopper, that is, the part other than the locking ring, is further removed from the mouth and neck. The main part of such an inner stopper can be loaded into the mouth and neck again to temporarily seal the opened mouth and neck. When a discharge opening is formed in the inner stopper, the main part of the inner stopper remains in the mouth and neck, and the contents can be discharged from the mouth and neck.

[Problems with conventional technology]

In conventional composite container lids, it is important that all of the multiple bridges in the inner stopper be broken when it is attached to the mouth and neck of the container, but at least some of the bridges are broken. If some bridge parts remain without being broken, the retaining ring of the inner plug may be removed when the outer lid is removed from the mouth and neck to open the mouth and neck. This causes the inconvenience that the locking ring elastically detaches from the lid and remains in the mouth and neck.

In order to solve such problems, it may be intended to significantly reduce the strength of the multiple bridge parts in the inner plug, but in this way the bridge parts may break when the inner plug and outer lid are assembled. This causes a problem in that the portion of the inner plug other than the locking ring falls off from the outer lid. Also,
By making the elastic mutual locking between the locking ring of the inner stopper and the outer lid extremely strong, the locking ring of the inner stopper is attached to the outer lid when the outer lid is removed from the mouth and neck of the container. It may also be intended to ensure that the bridges are also moved so that all bridges that remain unbroken are broken.

However, it is not easy to make the elastic mutual engagement between the locking ring of the inner plug and the outer lid sufficiently strong. Furthermore, since the outer lid of the conventional composite/container lid has a structure in which the top wall is not deformed and the entire lid is raised as it is, it is virtually impossible to break the bridge portion that remains unbroken. It is necessary to generate these products at the same time, and due to this, the opening operation of the mouth and neck area, more specifically, the operation of breaking the residual bridging part and detaching the locking ring of the inner stopper from the mouth and neck area together with the outer lid, is quite difficult. It takes strength,
It is especially difficult for women and children.

[Technical problem of the invention]

The present invention has been made in view of the above facts, and its main technical problem is to open the mouth and neck of a container even if the bridging part of the inner stopper is not broken when it is attached to the mouth and neck of the container. An object of the present invention is to provide an improved composite container lid that can sufficiently reliably and easily break the bridging portion of the inner stopper without requiring excessive force.

[Means for solving the invention]

As a result of intensive research and experiments, the present inventors found that (1) the outer lid includes a circular top wall, a cylindrical skirt wall hanging down from the periphery of the top wall, and a gripping piece extending from the lower edge of the skirt wall; (2) The inner plug is provided with a joining ring in place of the locking ring, It has been found that the above main technical problem can be achieved by joining the top surface to the inner surface of the top wall of the outer lid.

That is, according to the present invention, the outer lid is composed of a combination of an outer lid and an inner stopper made of synthetic resin, and the outer lid includes a circular top wall, a cylindrical skirt wall hanging down from the periphery of the top wall, and a lower end of the skirt wall. a gripping piece extending from the edge, the skirt wall having at least a pair of break lines formed therein, the inner plug having a cylindrical inset wall, an annular plug extending radially outwardly from an upper end of the inset wall; a flange wall; and a joining ring connected to the outer peripheral edge of the flange wall via a plurality of bridges arranged at intervals in the circumferential direction, and an upper surface of the joining ring of the inner stopper. is joined to the inner surface of the top wall of the outer lid.

[Effect]

In the composite container lid of the present invention, the joining ring of the inner stopper is joined to the inner surface of the top wall of the outer lid. Therefore, when the outer lid is removed from the mouth and neck of the container, the connecting ring of the inner stopper is reliably moved along with the outer lid, thus ensuring that there is a bridge portion that remains without being broken. If there are any residual bridges, the remaining bridges will be surely broken. When detaching the outer lid from the mouth and neck of the container, the gripping piece of the outer lid is pulled radially outward and upward to break the break line formed in the skirt wall, and the gripping piece is formed. The top wall is gradually deformed from the part toward the opposite side in the diametrical direction, and is gradually moved upward. Therefore, the joining ring of the inner stopper is also gradually moved upward from a specific angular position (where the gripping piece of the outer cover is located) toward the opposite side in the diametrical direction. Therefore, the remaining bridging portion of the inner stopper is Substantially all of them are not fractured at the same time, but are gradually fractured diametrically opposite from the specific region. Since the bridging portion is broken gradually in this manner, the force required to break the bridging portion is sufficiently small, so that the opening operation of the mouth and neck can be performed with sufficient ease.

[Preferred specific example]

Hereinafter, preferred embodiments of the composite container lid constructed according to the present invention will be described in detail with reference to the accompanying drawings.

Referring to FIG. 1, the illustrated composite container lid, generally designated by the number 2, is composed of a combination of an outer lid 4 and an inner stopper 6. As shown in FIG. The outer cover 4, which is conveniently made of sheet metal such as sheet aluminum, sheet chromated steel or sheet tin, comprises a circular top wall 8, a cylindrical skirt wall 101 depending from the periphery of this top wall 8, and a skirt wall. The tip of the gripping piece 12 having the gripping piece 12 extending from the lower edge of the gripping piece 10 is formed into a ring shape. Two pairs of break lines are formed on the outer M4 skirt wall 10, namely a first break line pair 14 and a second break line pair 16. - the first pair of breaking lines 14 extend from the lower edge to the upper edge of the skirt wall 10 at angular positions that coincide with or are close to both side edges of the gripping piece 12; It is advantageous for the first pair of breaking lines 14 to extend upwardly and away from each other (in other words, in a direction away from the gripping piece 12) with a slight inclination. The second pair of fracture lines 16 are located at angular positions spaced apart from the center of the gripping piece 12 by approximately 90 degrees or more on both sides when viewed in the circumferential direction. It extends virtually vertically. The first pair of break lines 14 and the second pair of break lines 16 may be so-called scores defined by reducing the material thickness.

To explain with reference to FIG. 1, as well as FIGS. 2 and 3,
The illustrated inner stopper 6, which can be integrally molded by injection or compression molding from a suitable synthetic resin such as polypropylene or polyethylene, includes a cylindrical fitting wall 18, a bottom wall 20 that closes the lower surface of the fitting wall 18, and a fitting wall 18. has an annular flange wall 22 extending radially outwardly from the upper end thereof. Second
As clearly shown in the figure, the outer diameter of the lower part of the fitting wall 18 is set to be slightly smaller than the outer diameter of the upper part. The center portion of the bottom wall 20 is slightly bulged upward. A tension ring 26 is connected to the top surface of the bottom wall 20 via an upright connecting post 24 extending upwardly therefrom. Further, a joining ring 30 is connected to the flange wall 22 of the inner stopper 6 via a plurality of bridge portions 28 . As can be clearly seen in FIG. 2, the joining ring 30 is positioned radially outwardly of the flange wall 22. In addition, the joining ring 30
is displaced upwardly relative to the flange wall 22, so that the upper surface of the flange wall 22 is displaced lower than the upper surface of the joining ring 30.

Bridge portion 2 connecting flange wall 22 and joining ring 30
8 are arranged at equal intervals in the circumferential direction, and extend from the upper end of the outer peripheral surface of the flange wall 22 to the lower end of the inner peripheral surface of the joining ring 30.

The outer M4 and inner stopper 6 as described above are combined as shown in FIG. 2 to constitute a composite container M2. More specifically, the outer lid 4 is fitted onto the inner plug 6, and the upper surface of the joining ring 30 in the inner plug 6 is brought into contact with the inner surface of the top wall 8 of the outer lid 4. In the present invention, the joining ring 3
It is important that the top surface of the top wall 8 not only be brought into contact with the inner surface of the top wall 8, but also be joined thereto. Such joining can be accomplished, for example, by applying a heated adhesive paint to a required area of the inner surface of the top wall 8 of the outer M4, and applying the adhesive paint while the top surface of the joining ring 30 is brought into contact with the inner surface of the top wall 8. This can be accomplished by heating. As the heating type adhesive paint, a well-known synthetic resin paint can be appropriately selected and used depending on the material of the inner plug 6. Heating of the adhesive coating can conveniently be accomplished by induction heating or the like.

FIG. 4 shows a state in which the above-mentioned composite container lid 2 is attached to the neck part 32 of the container and the neck part 32 is sealed. The container, which can be made of glass or a suitable synthetic resin, has a cylindrical opening 32 with an open top.
, and an annular locking protrusion 34 is formed at the upper end of the outer circumferential surface of the neck 32. When attaching the composite container lid 2 to the neck 32, the inner stopper 6 is inserted into the wall. 18 to mouth and neck 3
2 and press the entire composite container lid 2 downward. In this way, the entire composite container lid 2 is lowered until the lower surface of the flange wall 22 of the inner stopper 6 comes into contact with the upper end surface of the neck portion 32. When the flange wall 22 of the inner stopper 6 is brought into contact with the upper end surface of the neck part 32,
Although the insertion wall 18 and the flange wall 22 of the inner plug 6 are prevented from descending, the flange wall 22 and the joining ring 30 of the inner plug 6 are elastically deformed and the plurality of bridge portions 28 (second
Due to the elastic deformation shown in FIGS. 3 and 3), the joining ring 30 of the inner stopper 6 is further lowered as the outer cover 4 is lowered. In this way, the joining ring 30 is lowered relative to the flange wall 22, and the upper surface of the flange wall 22 and the upper surface of the joining ring 30 are made to be substantially at the same level. At this point, the outer M4 surrounding the mouth and neck region 32
The lower end of the skirt wall 10 is located below the locking protrusion 34 of the neck part 32. Next, the lower end of the skirt 910 of the outer cover 4 is deformed inward in the radial direction to lock the skirt wall 10 at the neck part 32. It is engaged with the lower surface of the protrusion 34, and thus the composite container lid 2 is attached to the neck portion 32.

Therefore, when the joining ring 30 of the inner stopper 6 is lowered relative to the flange wall 22 in the installation process as described above, it corresponds to a plurality of bridge parts 28 extending between the two. Therefore, it is expected or expected that the bridge portion 28 will be ruptured. However, according to the experience of the present inventors, the joining ring 30 and the flange wall 2
2 is absorbed by the elastic deformation of the synthetic resin, it is not easy to reliably break all the bridge parts 28, and at least some of the bridge parts 28
In the composite container M2 configured according to the present invention, when the composite container lid 2 is attached to the neck part 32, the inner stopper 6 is It is not particularly necessary to break the plurality of bridging parts 28, and therefore it is not necessarily necessary to configure the joining ring 30 to be moved relative to the flange wall 22 during the mounting process. .

When opening the neck 32 of the container and consuming the contents of the container, first insert your fingers into the ring-shaped portion of the gripping piece 12 on the outer lid 4, and move the gripping piece 12 radially outward. Then pull upward. Figure 5-A, Figure 5-B and Figure 5-C
The figure illustrates the behavior of the composite container lid 2 when such an operation is applied.

When the gripping piece 12 is pulled radially outward, the skirt wall l
The first breaking line 14 formed in the shape O is broken, and the part of the skirt wall 1o adjacent to the gripping piece 12 is displaced upward and separated from the locking protrusion 34 of the neck part 32 (the first breaking line 14 is broken). Figure 5-A).

Next, when the gripping piece 12 is pulled upward, the top wall 8 and the skirt wall 10 of the outer lid 4 are gradually displaced upward from the portion adjacent to the gripping piece 12 toward the opposite side in the diametrical direction, thereby engaging the mouth and neck part 32. A region of more than half (180 degrees or more) in the circumferential direction of the skirt wall 10 where the second breaking line 16 separated from the stop ridge 34 and formed on the skirt wall 10 is broken (Fig. 5-B) When the outer lid 4 is separated from the locking protrusion 34 of the mouth and neck part 32, the locking of the outer lid 4 to the mouth and neck part 32 is released, and after that, the entire outer lid 4 is attached to the mouth and neck part 32.
(Figure 5-C).

When the outer lid 4 is removed as described above, since the upper surface of the joining ring 30 on the inner stopper 6 is joined to the inner surface of the top wall 8 of the outer lid 4, the joining ring 30 It is also displaced upwardly along with the outer lid 4 and removed from the mouth and neck part 32. While the bonding ring 30 is displaced upward and separated from the mouth and neck region 32, the bridge portions 28 that were maintained without being broken during installation are broken, and thus the bond is broken. Ring 30 is the inner stopper 6
separated from the rest of the Figure 5-A, Figure 5-B
As can be easily understood by comparing the figures and FIG. It is generated gradually towards the side. Therefore, the plurality of bridge portions 28 are broken, and the gripping piece 1 is not broken at the same time.
It is performed progressively from those located adjacent to 2 to those located diametrically opposite. Therefore, the force required to break the plurality of bridging portions 28 is sufficiently small, and the detachment of the outer lid 4 does not require excessive force due to the breakage of the plurality of bridging portions 28. 6 other than the joining ring 30, the fitting wall 18 is relatively tightly connected to the neck part 32.
Due to the fact that it is inserted into the inner part, it remains in the mouth and neck part 32 without being raised along with the outer M4.

Next, as shown in FIG. 5-D, the tension ring 26 of the inner stopper 6 is hooked with a finger and pulled upward, so that the inner stopper 6 is also separated from the mouth and neck part 32. Thus, the mouth and neck region 32 is opened, and the contents of the container can be appropriately expelled from the mouth and neck region 32 for consumption.

- If it is desired to temporarily reseal the mouth and neck 32 after opening the mouth and neck 32, only the inner stopper 6 (the connecting ring 30 is already spaced apart and is not present) is inserted into the mouth and neck 32 again. It should be installed on.

〔Effect of the invention〕

In the composite container lid configured according to the present invention, the neck of the container can be opened even if all of the plurality of bridges in the inner stopper are not cut when the composite container lid is attached to the neck of the container. In this case, the remaining bridges are broken easily and reliably. Since the breaking of the plurality of bridges is carried out gradually, no excessive force is required to break the bridges, so opening of the mouth and neck is always carried out with sufficient ease.

[Brief explanation of drawings]

FIG. 1 is an exploded perspective view showing a preferred embodiment of a composite container lid constructed in accordance with the present invention. FIG. 2 is a sectional view showing the composite container lid of FIG. 1 assembled as required. FIG. 3 is a plan view showing the inner stopper of the composite container lid of FIG. 1; The fourth is a cross-sectional view showing a state in which the composite container lid of FIG. 1 is attached to the mouth and neck of the container. Figures 5-A, 5-B, 5-C, and 5-D show the lid of the composite container shown in Figure 1 attached to the mouth and neck of the container being removed from the mouth and neck. FIG. 4 is a cross-sectional view showing various stages of opening. 2...Composite container lid 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 26, 28, 30, 32, outer lid, inner stopper, top wall of the outer lid, outside of the skirt wall of the outer lid Gripping piece of the lid First breaking line of the outer lid Second breaking line of the outer lid Insertion of the middle stopper Wall bottom of the middle stopper Wall Flange of the middle stopper Tension ring of the middle stopper Wall Bridge of the middle stopper Joining of the middle stopper Mouth and neck of ring container Fig. 2 Fig. 3 Fig. 1 Fig. 5-A Fig. 2 and Fig. 5-D

Claims (1)

[Scope of Claims] 1. Consisting of a combination of an outer lid and a synthetic resin inner stopper, the outer lid includes a circular top wall, a cylindrical skirt wall hanging from the periphery of the top wall, and a lower end of the skirt wall. a gripping piece extending from the edge, the skirt wall having at least a pair of break lines formed therein, the inner plug having a cylindrical inset wall, an annular plug extending radially outwardly from an upper end of the inset wall; a flange wall; and a joining ring connected to the outer peripheral edge of the flange wall via a plurality of bridges arranged at intervals in the circumferential direction, and an upper surface of the joining ring of the inner stopper. is joined to the inner surface of the top wall of the outer lid. 2. The composite container according to claim 1, wherein in the inner stopper, the joining ring is located radially outward of the flange wall, and the upper surface of the flange wall is displaced below the upper surface of the joining ring. lid. 3. The composite container lid according to claim 1 or 2, wherein the inner stopper has a bottom wall that closes the bottom surface of the insertion wall, and a tension ring connected to the top surface of the bottom wall. 4. The composite container lid according to any one of claims 1 to 3, wherein at least the top wall and the skirt wall of the outer lid are made of a thin metal plate. 5. The skirt wall of the outer lid has a first pair of breaking lines extending upward from the lower edge to the upper end of the skirt wall at angular positions that match or are close to both side edges of the grip piece; A pair of second fracture lines extending upward from the lower end edge to the upper end of the skirt wall are formed at positions spaced apart by an angle of approximately 90 degrees or more on both sides in the circumferential direction with respect to the circumferential center of the skirt wall. The composite container lid according to claim 4.