JPH0714730B2 - Sealing structure of cap and container - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cap made of a thin metal fixed to a container mouth, which is separated into upper and lower parts by rotating the cap. The present invention relates to a so-called pill fur-proof type cap and container sealing structure that can be attached and detached.

[0002]

2. Description of the Related Art Conventionally, as a sealing structure for a pill fur proof type cap and a container, those shown in FIGS. 5 to 7 have been known. In this sealed structure, the mouth 10 of the container 100 is
The outer periphery of the container 1 is provided with a screw portion 102 from the upper end side and a step portion 104 protruding from the outer periphery of the container 100. Cap 2
00 is a circular top plate portion 201, a cylindrical side body portion 202 hanging down from the peripheral edge of the top plate portion 201, and the top plate portion 2
01, the side body 202 has a packing fixing groove 203 projecting inward at the upper end thereof, and cuts 205 and bridges 206 are alternately formed below the packing fixing groove 203. A brittle separating portion 204 is provided in the circumferential direction.

In this hermetically sealed structure, the cap 200 is attached to the container mouth 101, and the packing 208 is pressed against the upper end surface of the container 100, and the screw portion 1 of the container mouth 101 is held.
The roller (not shown) of the winding machine is pressed against the portion facing the No. 02 and the portion facing immediately below the step 104, and the screw thread 1
A groove 207 that engages 03 and a groove 209 that engages the lower edge of the step 104 are formed to seal the container mouth 101.

A cap 20 fixed to the container mouth 101
0, when it is rotated counterclockwise, the connecting portion 20
The bridge 206 of 4 is torn up and down, and the connecting portion 204
The lower cap lower part 211 remains in the container 100, and only the cap upper part 210 above it is removable from the container mouth 101.

[0005]

However, in the above-mentioned sealed structure, even if the lower portion 211 of the cap is removed in order to collect and reuse the container 100, the groove 209 engages with the lower edge of the step portion 104. Therefore, there is a problem that it cannot be easily removed. That is, the cap 2
Since 00 is generally formed of aluminum, it cannot be easily torn with a finger, and there is a risk of injury if it is forcibly torn with a finger. In addition, the gap between the cap 200 and the container 100 is narrow, and the tip of pliers or the like does not depend on the back surface of the cap, and there is a risk of damaging the bottle if it is forced. Furthermore, even if a vertical perforation is inserted in the lower cap portion 211 and tears are made along this perforation line, if the length of the lower cap portion 211 is long, the split line may disengage from the perforation or bend, and I couldn't tear it up cleanly.

[0006]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and in a cap-container sealing structure according to the present invention, the cap (11) is a cap upper part (18). ) And the cap lower part (20), there is a circumferentially continuous separating part (15), and the container has a screw thread (3) and a bulging part (4) from the upper end to the outer circumference of the mouth part. ,
The surface (9) having a height substantially the same as the height of the bulging portion (4) and facing the cap closing direction is a gentle slope, and the surface (10) facing the cap opening direction has a steep slope. It has at least one stopper (7) as a mating surface, the cap (11) is attached to the container mouth (2), and the cap upper part (18) is pressed and deformed along the screw thread (3). To form a screw part (22),
The height of 0) where the stopper (7) is located is pressed and deformed over the entire circumference to form an engaging portion (23) projecting inward to seal the inside.

[0007]

According to the above sealing structure, the cap (11) is
When the upper cap (18) is gripped and rotated in the opening direction (direction of arrow X), the upper cap (18) tries to rotate along the screw thread (3), but the lower cap (2) is rotated.
0), the engaging portion (23) has the engaging surface (1) of the stopper (7).
0) and the rotation is restricted, and the engaging part (23) is engaged with the lower edge part of the bulging part (4) to restrict the upward movement. As a result, a tensile force acts on the separating portion (15) located at the boundary between the upper cap portion (18) and the lower cap portion (20), the upper and lower caps (18) are torn apart by the separating portion (15), and the upper cap portion (18) is It is removable from the mouth (2). The lower cap (2) left on the container mouth (2)
0), when this is rotated in the cap closing direction (arrow Y direction), the engaging portion (23) causes the gentle slope (9) of the stopper (7).
It is extruded to the outside while sliding and disappears, and can be removed from the container mouth (2).

[0008]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 shows a mouth 2 of a container body 1 and a cap 11 fixed to the mouth 2. A spiral thread 3, a bulge portion 4, and a bead portion 5 are formed on the outer periphery of the mouth portion 2 from the upper end side, and the bulge portion 4 is lower than the middle stage 4b.
Has a diameter slightly larger than that of the upper portion 4a, and the bead portion 5 has substantially the same diameter as the bulging portion 4.
Further, a plurality of stoppers 7 projecting outward are formed in the groove portion 6 formed between the bulging portion 4 and the bead portion 5,
The tip 8 is substantially aligned with the outer peripheral surfaces of the bulging portion 4 and the bead portion 5, and the surface 9 facing the cap closing direction (arrow Y direction) is a gentle slope (9) and the cap opening direction (arrow X direction). The surface 10 opposed to is a steeply-engaged engagement surface (10) rising almost vertically from the outer periphery of the container body 1. The stopper 7 does not have to be plural, and it is sufficient that at least one stopper is provided. Further, although the bulging portion 4 has a taper on the lower portion 4b, it may have a straight shape without a taper.

The cap 11 is composed of a top plate portion 13 having a diameter slightly larger than that of the bulging portion 4 and a side body portion 14 hanging from the peripheral edge of the top plate portion 13, and a back surface of the top plate portion 13. 2 and the packing 24 (see FIG. 2) arranged in
Separation parts 15 in which 7 are alternately formed are formed, and a plurality of slip stoppers 1 are provided on the cap upper part 18 above the separation parts 15.
9. A plurality of weakening line portions 21 extending in the vertical direction are formed at equal intervals on the lower portion 20 of the cap below the separating portion 15. The weakened line portion 21 is a cut portion or a thin portion along the line.

The cap 11 is packaged in the container mouth portion 2, and the upper end portion of the cap is pressed from above to press the packing 24 against the upper end surface of the mouth portion 2, and as shown in FIG. The roller is pressed against the upper cap portion 18 to form a threaded portion 22 along the screw thread 3, and the roller is pressed against the lower cap portion 20 to form an engaging portion 23 protruding inward along the groove portion 6 for sealing. To be done. At this time,
By the weakening line portion 21 provided on the lower portion 20 of the cap, the regions delimited by the weakening line portion 21 are independently deformed and are not affected by the adjacent regions. Therefore, as shown in FIG. The part 23 uniformly penetrates to the bottom of the groove 6. Note that the weakened line portion 21 is omitted in FIG. 3.

When the cap 11 fixed to the container mouth 2 in this manner grips the cap upper portion 18 and rotates in the opening direction (arrow X direction), the screw portion 22 of the cap upper portion 18 is rotated.
Tries to move along the screw thread 3, but as shown in FIG. 3, the lower cap 20 is engaged with the engaging portion 23 of the engaging surface 10 of the stopper 7 and its rotation is restricted. The upward movement of the portion 23 is restricted by the bulging portion 4. As a result, a vertical pulling force acts on the bridge 17 of the separating portion 15 to tear this portion (bridge 17), and the cap upper portion 18 can freely rotate in the opening direction (arrow X direction), and can be detached thereafter. Become. On the other hand, the lower part of the cap 20
Stays in the container body 1 because the engaging portion 23 is engaged with the groove portion 6.

When the cap lower portion 20 is removed from the container, it is rotated in the cap closing direction (direction of arrow Y). This allows
As shown in FIG. 4, the engaging portion 23 is formed on the gentle slope 9 of the stopper 7.
If the two stoppers 7 are arranged at equal intervals as shown in the drawing, the cap lower portion 20 is rotated by approximately 180 °, so that the engaging portion 23 is almost eliminated, and the cap lower portion 20 is The shape substantially returns to that shown in FIG. Therefore, thereafter, the cap lower portion 20 can be easily lifted and removed from the container mouth portion 2.

As in the present embodiment, the cap lower portion 2
When the weakening line portion 21 is provided at 0, less force is required to rotate the lower cap portion 20. Further, in the absence of the weakening line portion 21, when one portion of the engaging portion 23 spreads outward by the stopper 7, a force acts to re-deform the other portion inward, but the weakening line portion 21 is removed. By providing it, the influence can be eliminated, and the once expanded portion will not be deformed inward again. As described above, although it is clear that various advantages are provided by providing the weakening line portion 21, the weakening line portion 21 is not always necessary, and even if the weakening line portion 21 is not provided, the cap lower portion 20 may be provided in the container mouth portion 2.
Of course, it can be removed from.

In the above-described embodiment, the tip 8 of the stopper 7 is substantially the same as the height of the bulging portion 4, but it may be slightly projected from the bulging portion 4. In this case, since the stopper 7 pushes the portion of the engaging portion 23 to a larger diameter than the bulging portion 4, the stopper lower portion 20 can be removed more easily.

Further, in the above-mentioned embodiment, the container in which the bead portion 5 is provided below the bulging portion 4 has been described as an example, but the present invention can be applied to a container without the bead portion 5. In this case as well, the stopper 7 may be formed in the same manner, and the cap 11 may be deformed inward at the height portion where the stopper 7 is located over the entire circumference.

[0016]

As is apparent from the above description, in the container-cap sealing structure according to the present invention, the lower portion of the cap below the separating portion can be easily and manually operated without using tools such as pliers or nippers. It can be removed from the container, is safe without being injured during removal, and does not damage the container, improving the efficiency of container recycling. Further, by providing the fragile portion in the lower portion of the cap, the engaging portion is reliably formed, the engagement between the engaging portion and the bulging portion is ensured, and when the engaging portion is expanded outward, It can be easily and uniformly spread over the entire circumference.

[Brief description of drawings]

FIG. 1 is a perspective view of a container opening and a cap before mounting.

FIG. 2 is a partially cutaway front view showing a state in which a cap is fixed to a container mouth.

3 is a cross-sectional view taken along the line AA of FIG.

FIG. 4 is a cross-sectional view showing a state in which the engagement step portion is expanded.

FIG. 5 is a front view of a conventional container mouth portion.

FIG. 6 is a front view of a conventional cap with a half cutaway.

FIG. 7 is a partially cutaway front view showing a conventional cap mounted state.

[Explanation of symbols]

1 ... container body 2 ... mouth 3 ...
Thread 5 ... Bulging part 6 ... Bead part 7 ...
Stopper 9 ... gentle slope 10 ... steep slope 11
… Cap 12… Cap body 15… Separation part 18
... Cap upper part 20 ... Cap lower part 21 ... Fragile part (weakened line part) 22 ... Screw part 23 ... Engagement part

Claims (2)

[Claims] 1. A thin-walled metal cap (11) fixed to the container mouth (2) is separated into upper and lower parts by rotating the cap, leaving the lower part (20) of the cap at the container mouth (2). In a sealed structure of a cap (11) and a container, wherein the cap upper part (18) is detachable from the container mouth part (2), the cap (11) is the cap upper part (1).
8) and a cap lower part (20) have a continuous separation part (15) in the circumferential direction, and the container has an outer periphery of its mouth part,
From the upper end, the thread (3), the bulging portion (4), and the height which is almost the same as the height of the bulging portion (4), and the surface (9) facing the cap closing direction is a gentle slope. And has at least one stopper (7) whose surface (10) facing the opening direction of the cap is a steeply inclined engaging surface, and the container mouth (2)
The cap (11) is attached to the cap (11), the cap upper portion (18) is pressed and deformed along the screw thread (3) to form a screw portion (22), and the stopper (7) of the cap lower portion (20) is formed. ) Is deformed by pressing over the entire circumference of the height portion, and an engaging portion (23) projecting inward is formed to hermetically seal the cap and the container. 2. The hermetically sealed cap and container according to claim 1, wherein a plurality of fragile portions (21) are formed on the lower portion (20) of the cap so as to traverse the engaging portion (23) vertically. Construction.