JPH08151063A - Cap that is easily removable from mouth of container - Google Patents

Abstract

PURPOSE: To obtain a cap whose weakened line for breaking the cap may not be easily broken by a driving operation of cap and which can be easily removed from a mouth of a container. CONSTITUTION: In a cap which comprises a cap body 2 adapted to be fitted in a mouth of a container and having a top plate 5 and a skirt 6, a weakened part 8 being provided in the top plate 5 to form a content takeout opening 7, a ring-shaped side wall 3 adapted to be fitted on the outer periphery of the skirt 6 of the body 2, and a top cover 4 which can be opened or closed and which is fixed so as to cover the plate 5 of the body 2, and the body 2 and the wall 3 are fixed by engaging parts 12, 14 which are engaged with each other, a thin wall portion and a weakened portion are provided in the ring- shaped side wall 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cap that can be easily removed from the mouth of a container, and more particularly to a cap that can be easily removed from the mouth of a container when the container and the cap are separated and discarded. Regarding a removable cap.

[0002]

2. Description of the Related Art In recent years, from the viewpoint of garbage problems and recycling of resources, it is necessary to separate and dispose of garbage according to its material. Conventionally, glass containers, resin containers, etc. are often used in the container of food etc. from the viewpoint of storability of contents, and this container is made of a resin cap made of different material from the viewpoint of moldability, handleability, etc. Has been applied. For containers and caps made of such different materials, when the contents are lost and the container is disposed of,
It is necessary to remove the cap from the container, separate the container from the cap, and discard.

There is already known a cap which can be easily removed from the mouth of the container. For example, a cap body and an upper lid hinged to the cap body are provided, and a weakening line is provided on the cap body at a position corresponding to the hinge, and an axial weakening line is provided continuously to the weakening line.
There is known a cap in which the weakening line is broken by pulling the upper lid toward the cap body so that the cap body can be removed from the container opening (Japanese Utility Model Publication No. 5-34151).

[0004]

However, in such a cap, in order to fix the cap to the container, the engaging projection provided on the container mouth and the engaging projection provided on the inner surface of the cap body are driven. Since the engagement is performed by the stopper, the engaging projection of the cap body has to ride over the engaging projection of the container opening portion at the time of capping, and at this time, the skirt portion of the cap body expands in the radial direction and the weakening line is broken. There is a problem that it ends up. Also, since the cap body and the upper lid are integrally molded, both the circumferential weakening line and the axial weakening line corresponding to the hinge can be used when breaking the weakening line and removing the cap body from the container mouth. Has to be broken, which is not easy to remove.

Accordingly, it is an object of the present invention to provide a cap in which the weakening line for breaking the cap is not broken by the tapping operation and can be easily removed from the mouth of the container.

[0006]

According to the present invention, it is fitted to a container mouth portion which comprises a top plate portion and a skirt portion, and the top plate portion is provided with a weakened portion forming an opening for taking out contents. An engaging portion including a cap body, an annular side wall fitted to the outer periphery of the skirt portion of the cap body, and an upper lid that is openably and closably fixed so as to cover the top plate portion of the cap body, and the cap body and the annular side wall engage with each other. A cap having a thin wall portion and a weakened portion is provided on the annular side wall.

In the present invention, the thin portion provided on the annular side wall is preferably provided so that the average thickness is 0.35 to 0.55 mm at a rate of 5 to 35% of the area of the annular side wall. It is preferable to disperse two or more pieces, and it is particularly preferable to dispose them symmetrically around the hinge portion.

[0008]

The cap of the present invention has a two-piece structure comprising a combination of an annular side wall in which the cap body and the upper lid are hingedly connected, or a combination of a cap body in which the annular side wall and the upper lid are hingedly connected, and the annular side wall is the cap body. It is attached to the stopper in a state where the cap body and the annular side wall are united, but it is difficult to spread because the cap body is constrained from the outside by the annular side wall, and in the annular side wall. Does not receive direct force,
Even if the weakened portion is provided on the annular side wall, it is difficult to break. Moreover, since the annular side wall has a thin portion, even if the annular side wall receives stress during tapping, the thin portion extends to relieve the stress and weaken the annular side wall. It is possible to effectively prevent the part from breaking.

Further, in the cap of the present invention, when the container is discarded, the weakened portion provided on the annular side wall is first broken and removed from the cap body, so that the cap can be easily removed from the container opening. Can be done.
Further, the cap body may be provided with a score or a slit, and in this case, the cap body can be more easily removed from the container opening.

In the present invention, the thin portion provided on the annular side wall preferably has an area of 5 to 35% of the outer peripheral side surface of the annular side wall. If the thin portion is less than the above range, stress relaxation during tapping may not be sufficiently performed and the weakened portion may be broken, and if the thin portion is more than the above range, the rigidity as a cap may be lacking. Is not preferable. In addition, the wall thickness of the cap is preferably thinner as it goes downward from the ease of tapping, and therefore the average wall thickness of the thin portion is preferably about 0.35 to 0.55 mm. . If the thin wall portion is thicker than the above range, it will be difficult for the thin wall portion to expand during plugging, and the function as the thin wall portion cannot be exhibited. If the thickness is smaller than the above range, the holding power as a cap may be insufficient, and the thin portion itself may be broken at the time of plugging, which is not preferable.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The cap of the present invention will be described in detail below with reference to the accompanying drawings. FIG. 1 is a diagram showing an example of a cap of the present invention, (A) is a top view, and (B) is XX of (A).
Side sectional views are respectively shown. In FIG. 1, the cap of the present invention, which is generally designated by 1, is composed of a cap main body 2 fitted in a container opening (not shown), an annular side wall 3 and an upper lid 4. FIG. 2 is an exploded perspective view (partially shown in cross section) of the annular lid-attached side wall and the cap body in a state where the upper lid is opened in the cap of the present invention shown in FIG.
(A) shows an annular side wall and an upper lid, (B) shows a cap main body, respectively.

The cap body 2 is composed of a top plate portion 5 and a skirt portion 6, and a score 8 is provided at the center of the top plate portion 5 for partitioning the planned opening portion 7, and the portion partitioned by the score 8 (that is, the planned opening portion). The portion 7) is provided with an opening tab 9 which serves as a clue for breaking the score 8 when opening.
A spout cylinder 10 is provided around the planned opening portion 7. The spout 10 has a role of a nozzle when the contents are taken out, and a role of preventing the outer surface of the cap from being contaminated with the contents after the tab is pulled up to form the opening. Further, an inner ring 11 positioned on the outer peripheral side of the score 8 is provided on the inner surface side of the top plate portion 5, and the container mouth portion is fitted and sealed together with the skirt portion 6. The outer peripheral surface of the skirt portion 6 is provided with an annular recess 12 into which an engaging projection of an annular side wall described later engages. Further, in the embodiment shown in FIG. 2, the weakened portion is not provided on the outer surface of the skirt portion 6 of the cap body 2, but as shown in FIG. 3, a plurality of slits 13, 13 extending upward from the lower end of the skirt portion are provided. May be.

The annular side wall 3 is provided at its upper end with a flange 14 projecting inward in the circumferential direction, and the flange 14 engages with the annular recess 12 of the cap body (engagement protrusion 14).
To thereby fix the annular side wall 3 to the cap body 2. Further, the flange 14 is provided with a locking projection 16 that locks the locking projection 15 provided on the upper lid 4 to fix the upper lid 4. As shown in FIG. 2, the annular side wall 3
A thin portion 17 is provided in the. In the specific example shown in the drawing, two thin portions 17 are provided symmetrically with respect to the line X-X in FIG. 1 (A), thereby preventing breakage of the weakened portion at the time of tapping. .

The flange (engagement protrusion) 14 provided on the annular side wall 3 has a notch 19 at a portion corresponding to the hinge portion, and the weakening extending from both sides of the hinge 18 to the lower end following the notch 19. The parts 20a and 20b are provided so that the annular side wall 3 can be easily broken. Further, in FIG. 4 showing the YY cross section of FIG. 1 (B), in the annular side wall 3, the portion 21 sandwiched between the weakened portions 20 a and 20 b is thick in the vicinity of the weakened portion 20 and is weakened thereby. The breakage of the portion 20 becomes more reliable. 5A and 5B are diagrams showing cross-sectional shapes of the weakened portion 20 and the thin portion 17, where FIG. 5A is a top view of only the annular side wall 3 in FIG. 2A, and FIG. 5B is ZZ of FIG.
Side sectional views are respectively shown. As can be seen from FIG. 5B, the thin portion 17 is gradually thinned downward. Therefore, the average thickness of the thin portion described above means the flange 1
The average thickness of the length from the lower end of 4 to the lower end of the annular side wall 3 (the portion indicated by S).

The upper lid 4 has a top plate portion 22 as shown in FIG.
And a skirt portion 23, and a sealing portion 24 is provided on the inner surface of the top plate portion so as to contact the spout cylinder 10 of the cap body and maintain the sealing performance of the cap. The upper lid 4 is connected to the annular side wall by a hinge 18, and a stopper opening piece 25 for releasing the engagement of the engagement protrusions 15 and 16 is provided at a position facing the hinge 18.

Another example of the present invention will be described. FIG. 6 is an exploded perspective view (partially shown in cross section) of the upper lid annular side wall and the cap body with the upper lid opened, (A) showing the annular side wall and the upper lid, and (B) showing the cap body, respectively. It is a thing. This aspect is basically the same as that described above, and the engaging protrusion 14 provided on the annular side wall 3 is provided on the lower side in addition to the aspect shown in FIG. 2, and also on the cap body skirt portion 6. It differs from the cap of the first aspect in that an annular recess 12 is provided and a score 13 is provided as a weakening portion in the cap body. According to this aspect, the engagement between the annular side wall and the cap body becomes more reliable, and the cap body is easily removed after the annular side wall is removed while maintaining the sealing property of the cap.

7 and 8 are perspective views for explaining the removal of the cap of the present invention from the container opening portion, and an example of the cap of the present invention shown in FIG. 6 will be described. Figure 7
First, the upper lid 4 is pulled in the direction of the arrow P in the figure to break the weakened portions 20a and 20b provided on the annular side wall, and the annular side wall is broken and removed from the cap body. Then, the cap body can be removed from the container opening by pulling up the lower portion of the cap body in the direction of arrow Q in FIG. 8 so as to break the score 13 provided on the cap body. When the upper lid 4 is lowered downward and the weakened portions 20a, 20b are broken, the upper lid 4 connected by the hinge 18 and the portion 21 sandwiched by the weakened portions 20a, 20b are separated from the annular side wall 3, and the annular side wall 3 is illustrated. The shape is as shown in FIG. 9, which allows easy removal from the cap body.

In FIG. 10 showing another example of the present invention,
The upper lid 4 is hinged to the cap body 2, and the annular side wall 3 extends upward in the circumferential direction from the lower end of the annular side wall.
Next, a weakened portion 30 is provided that extends upward in the axial direction and further extends in the opposite direction in the circumferential direction to reach the upper end. As a result, a tearing portion 31 is formed on the annular side wall 3 as a clue to the destruction of the annular side wall. In this aspect, in order to remove the cap from the container opening, first, the tearing portion 31 is lifted and the annular side wall 3 is broken along the weakening portion 30. Then, the cap body 2 provided with the slit 13 may be removed. In this mode as well, the cap is plugged into the container mouth part by integrating the annular side wall and the cap body. However, since the cap is also a two-piece structure and the annular side wall is provided with a thin portion, the cap is capped. Therefore, the weakened portion of the annular side wall is not broken.

The present invention is not limited to the specific examples described above, and various modifications can be made. For example, the thin portion provided on the annular side wall may be provided in consideration of the design of the cap, or may be provided on the inner surface side. Further, the upper lid is not limited to one that is connected to the cap body or the annular side wall by a hinge, but may be one that is engaged with a screw. In this case, the annular side wall may be the one shown in FIG.

Further, since the cap of the present invention has a two-piece structure, the thickness of the cap body can be made thinner than that of a one-piece cap, and the cap body can be formed without providing a weakened portion in the cap body. Although it can be easily destroyed, it is particularly preferable to provide the cap body with a weakened portion in order to remove the cap body more easily. Further, the weakened portion provided on the cap body may have a slit at the lower end, and a score may be provided above the slit in a continuous manner. Alternatively, as in the example shown in FIG. Since it is fixed by the side wall, it does not affect the function as a cap. If at least one weakened portion of the cap body is provided, the cap body can be easily removed, but it is preferable to provide two or more weakened portions from the viewpoint of breakage.

[0021]

According to the present invention, when the container is discarded,
The cap can be easily removed from the mouth of the container.
Moreover, the cap can be effectively prevented from being damaged by the tapping operation when the cap is attached to the mouth of the container.

[Brief description of drawings]

FIG. 1 is a plan view and a side sectional view of an example of a cap of the present invention.

2 is a perspective view of the cap shown in FIG. 1. FIG.

FIG. 3 is a perspective view showing another mode of the cap body.

4 is a cross-sectional view of the cap shown in FIG.

FIG. 5 is a view showing cross-sectional shapes of a weakened portion and a thin portion of the cap body.

FIG. 6 is a perspective view of another example of the cap of the present invention.

FIG. 7 is a view for explaining a method for removing the cap of the present invention from the container mouth.

FIG. 8 is a view for explaining a method of removing the cap of the present invention from the container mouth.

9 is a view showing the annular side wall after the upper lid is removed in the cap shown in FIG.

FIG. 10 is a perspective view of another example of the cap of the present invention.

[Description of sign]

 DESCRIPTION OF SYMBOLS 1 Cap 2 Cap body 3 Annular side wall 4 Upper lid 12 Annular recess 13 Weakened portion 14 Flange (engaging protrusion) 17 Thin portion 18 Hinge 19 Notch 20 Weakened portion

Claims (4)

[Claims] 1. A cap main body fitted to a container mouth, and a skirt part outer periphery of the cap main body, which comprises a top plate portion and a skirt portion, and a weakening portion forming an opening for taking out contents is provided in the top plate portion. A cap having an annular side wall to be fitted and an upper lid that is openably and closably fixed so as to cover the top plate part of the cap body, the cap body and the annular side wall having an engaging portion that engages with each other. A cap having a thin portion and a weakened portion. 2. The upper lid is hingedly connected to an annular side wall,
The cap according to claim 1, wherein the annular side wall is provided with weakened portions extending from both sides of the hinge toward the lower end. 3. The cap according to claim 1, wherein the upper lid is hinged to the cap body, and the annular side wall has a tearing portion formed by a weakening portion extending in the axial direction and the circumferential direction. 4. The cap according to claim 1, wherein a weakened portion is formed on the cap body, and the weakened portion is a score or a slit formed upward from a lower end of the skirt portion.