JP3095907B2 - Resin cap with inner plug - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a resin cap with an inner plug, and more particularly, to a resin cap in which the inner plug provided at the container mouth can be easily detached from the container when the container is discarded. The present invention relates to a resin cap with a stopper.

[0002]

2. Description of the Related Art An inner plug provided to fit into a container mouth,
2. Description of the Related Art A resin cap with an inner plug including an upper lid provided in screw engagement with the inner plug is widely used as a cap for a container for a liquid seasoning such as soy sauce or sauce. Recently, there has been a demand for the reuse of various resources, and in the field of containers, it has been practiced to collect and reuse used ones. By the way, in the field of containers, since the materials of the container and the cap are generally different, when the container is recovered with the cap attached, an operation of separating the container and the cap is required.

[0003]

When the above resin cap with an inner plug is fastened to the container, the inner plug is fitted into the opening of the container by tapping. ,
It is very troublesome to separate this from the container, which is a problem in the recovery operation. SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a resin cap with an inner plug that allows the inner plug provided at the container mouth to be easily detached from the container.

[0004]

According to the present invention, there is provided a resin cap with an inner plug comprising an inner plug provided to be fitted to a mouth of a container and an upper cover provided by screw engagement with the inner plug. The upper lid comprises a top surface and a cylindrical skirt wall hanging down from a peripheral portion of the top surface, the skirt wall having an upper wall provided with a screw engaging portion on an inner surface, and a lower portion extending from the upper wall. And a large-diameter flange wall extending in the circumferential direction, the flange wall has an outer surface and an inner surface integrally formed with a concave portion formed inward from a regular peripheral surface, and a concave portion formed in the circumferential direction. At least two inner plugs are provided at intervals, and the inner plug is formed by a circular sealing wall provided with a pull ring, and a cylindrical side wall provided integrally with the sealing wall with a weakening line interposed therebetween. The cylindrical side wall is formed with an upright portion having a screw engagement portion on an outer surface. And a fitting portion which is bifurcated from the lower end of the upright portion and into which the container mouth wall is fitted. A thick portion is formed on the outer wall of the fitting portion, A part of the thick portion is formed with at least one U-shaped notch when viewed from above, leaving a thin outer wall,
On the lower wall of the notch, scores extend downward starting from both sides of the thin wall remaining in the notch, and a flange between the recesses of the upper lid can be inserted into the notch. A resin cap with an inner plug characterized by having such a size is provided.

[0005]

According to the present invention, the upper lid removed from the inner plug is used for the inner plug of the inner lid fitted to the container opening by utilizing the recess formed in the lower end (flange) of the skirt wall of the upper lid. The notch can be engaged with the notch. Therefore, by pulling the upper lid, the front inner plug breaks along the score formed below the notch, so that the inner plug can be easily separated from the container mouth. is there.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to specific examples shown in the accompanying drawings. FIG. 1 is a half sectional view showing a state in which a resin cap with an inner plug according to the present invention is fastened to a container mouth, FIG. 2 shows a side view of the whole, and FIG. 4 is a side sectional view of the inner plug, and FIG. 5 is a top view of the inner plug.

The resin cap with an inner plug according to the present invention is roughly formed of an upper lid 1 and an inner plug 2. Top lid 1
Consists of a top surface 3 and a cylindrical skirt wall 4 hanging down from the periphery thereof. On the upper inner surface of the skirt wall 4,
A screw portion 5 is formed, whereby the upper lid 1 is provided to be screw-engaged with the inner plug 2. A large-diameter flange wall 6 extends below the skirt wall 4.

Referring particularly to FIGS. 2 and 3, according to the present invention, it is important that the flange wall 6 be provided with a large number of recesses 7 at regular intervals in the circumferential direction. That is, it is possible to easily remove the inner plug 2 fitted to the container mouth portion by using the concave portion 7. This removing method will be described later. As is clearly understood from FIG. 3, the recess 7 is formed such that the outer surface and the inner surface of the flange wall 6 are integrally recessed inward from the regular peripheral surface. In the embodiment shown in the accompanying drawings, a large number of the concave portions 7 are formed. However, as long as the number of the concave portions 7 is at least two, the inner plug 2 can be removed.

The inner plug 2 is formed of a circular sealing wall 10 and a cylindrical side wall 11 provided integrally with the sealing wall 10. The seal wall 10 is provided with a pull ring 12, and a weakening line is provided between the seal wall 10 and the side wall 11.
13 are formed. That is, the container is hermetically sealed by the seal wall 10, and the pull ring 12 is held by hand and pulled, whereby the weakened line 13 is broken, the seal wall 10 is removed, and an opening is formed. Through this opening, the contents of the container are poured out.

An upright portion 15 extending vertically upward is formed on the cylindrical side wall 11, and a screw portion 16 is formed on the outer surface thereof.
Are formed. That is, the upper lid 1 can be attached to or detached from the inner plug 2 by screw engagement between the screw portion 5 of the upper lid 1 and the screw portion 16. Further, in the cylindrical side wall 11, the lower end of the upright portion 15 is bifurcated, and
And an outer wall 18 are formed. That is, these walls 17,1
The container opening 30 is fitted into the space between 8 by tapping, and the inner plug 2 is fixed to the container opening 30.

A thick portion 20 is formed on the outer wall 17. The inner surface of the thick portion 20 projects inward,
The container opening 30 is firmly fixed. Referring particularly to FIG. 5, which shows a top view of the inner plug 2, in the present invention, the upper end of the thick portion 20 has a thin U A plurality of cutouts 22 are formed in a cut-out form leaving the fragments 21. From both sides of fragment 21, score 23
Is provided. Here, the size of the notch 22 is set such that the flange wall 6 between the recesses 7 can be inserted into the notch 22. Such notch 22 and fragment 21
The inner plug 2 is provided to be detached from the container opening 30 by engaging the flange wall 6 between the concave portions 7. In the embodiment shown in the accompanying drawings, three are provided, but the number is arbitrary as long as at least one is formed. It is also desirable to make the lower wall of the notch 22 thinner in order to facilitate the breaking of the score 23.

FIG. 6 schematically shows a method of removing the inner plug 2 from the container opening 30 in the above-described resin cap of the present invention. First, the upper lid 1 is removed from the inner stopper 2. As described above, since the upper lid 1 is screwed to the inner plug 2, it can be easily removed. With the upper cover 1 removed, the flange wall 6 between the concave portions 7 is inserted into the cutout portion 22 of the inner plug 2 as shown in FIG. If the upper lid 1 is pulled in this state, the flange wall is caught by the fragment 21, and the thick portion 20 of the inner plug 2 breaks from the score 23, so that the inner plug 2 can be easily detached from the container mouth 30. Becomes possible.

In the above-described present invention, the lower end of the thick portion connected to the outer wall 18 of the inner plug 2 may be partially notched as shown in FIG. The grip portion 25 can be formed in the same manner as the notch portion 22. The flange wall 6 between the recessed portions 7 of the upper lid 1 is engaged with this portion, and the inner plug 2 is also pulled by pulling as described above. It can be detached from the container opening 30. Also score 23
Can be hooked with a finger or the like, so that the attachment and detachment of the inside plug 2 can be performed more easily.

[0014]

According to the resin cap with an inner plug of the present invention, the inner plug provided at the container mouth can be easily detached from the container, so that the used container can be easily collected and reused. The container and the cap can be easily separated, which is extremely useful for recycling.

[Brief description of the drawings]

FIG. 1 is a half sectional view showing a state in which a resin cap with a plug according to the present invention is fastened to a container mouth.

FIG. 2 shows a side view of the entire cap of FIG.

FIG. 3 shows a bottom view of the upper lid.

FIG. 4 shows a side sectional view of the inner plug.

FIG. 5 shows a top view of the inner plug.

FIG. 6 is a view showing a method of detaching the inner plug from the mouth of the container.

FIG. 7 is a view showing a preferred example of the cap of the present invention.

Claims (1)

(57) [Claims] An inner plug provided to fit into a container mouth,
A resin cap with an inner plug comprising an upper lid provided by screw engagement with the inner plug, wherein the upper lid comprises a top surface and a cylindrical skirt wall hanging down from a peripheral portion of the top surface. Is formed from an upper wall provided with a screw engaging portion on the inner surface, and a large-diameter flange wall extending downward from the upper wall, and the outer surface and the inner surface are integrated with the flange wall. As a result, at least two recesses formed by recessing inward from the regular circumferential surface are provided at intervals in the circumferential direction, the inner plug is a circular seal wall provided with a pull ring,
A cylindrical side wall provided integrally with the seal wall with a weakening line interposed therebetween, the cylindrical side wall having an upright portion having a screw engaging portion on an outer surface,
And a fitting portion into which the container mouth wall is fitted between the forked portions from the lower end of the upright portion, and a thick portion is formed on an outer wall of the fitting portion. At least one U-shaped notch as viewed from above is formed in a part of the portion, leaving a thin outer wall, and the lower wall of the notch is left inside the notch. The score is extended downward from both sides of the thin wall as starting points, and the cutout portion has a size such that a flange between the concave portions of the upper lid can be inserted. cap.