JP2003118759A - Inner cap for separate collection - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make a vertical weakened line unbreakable in capping. SOLUTION: This inner cap is provided with a synthetic resin fitting and mounting wall 2 having an inside fitting protrusive strip 5 and a vertical weakened line 7 running from the top end 2a side to the bottom end 2b of the wall 2. An auxiliary weakened line 8 running parallel to the line 7 is formed on the wall 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inner stopper made of synthetic resin, and more specifically to an inner stopper for separate collection which is fitted to the mouth of a container made of glass or synthetic resin. is there.

[0002]

2. Description of the Related Art A conventional inner plug has a fitting wall made of synthetic resin having a fitting ridge on its inner surface, a longitudinal weakening line extending from the upper end side to the lower end of the fitting wall, and a continuous longitudinal weakening line. A circumferential weakening line, and a knob provided near the upper end of the longitudinal weakening line,
Is equipped with. The inner plug is attached to the container opening by tapping, and the fitting protrusion engages with the engaging recess of the container opening.

When the contents of the container are used up and separated and collected, when the picking pieces are picked with fingers and pulled from the upper side to the lower side, the longitudinal weakening line is torn and the fitting protrusion is cut. Next, when the knob is pulled in the circumferential direction, the circumferential weakening line starts to break, the pulling portion of the fitting wall gradually separates from the container mouth, and the inner plug comes off from the container mouth.

[0004]

In the conventional example, when the inner stopper is plugged into the container mouth portion and mounted, the fitting protrusion slides along the outer peripheral surface of the container mouth portion to cause the engagement recess. Engage with. This time,
Since the fitting protrusion is pushed by the container mouth and the fitting wall expands in diameter, the thin vertical weakening line may be broken, resulting in poor mounting.

Therefore, in order to solve this problem, it is conceivable to increase the thickness of the vertical weakening line. However, in this way, it is possible to prevent the vertical weakening line from breaking at the time of tapping, but on the other hand, it is difficult to disconnect from the vertical weakening line during separate collection, so it is difficult to remove the inner plug from the container mouth. Becomes

In view of the above circumstances, it is an object of the present invention to prevent the longitudinal weakening line from breaking at the time of tapping.

[0007]

SUMMARY OF THE INVENTION The present invention is a separation member provided with a fitting wall made of synthetic resin having fitting projections on the inner surface, and a vertical weakening line extending from the upper end side to the lower end of the fitting wall. In the plug during recovery: The fitting wall is provided with an auxiliary weakening line facing the vertical weakening line. The auxiliary weakening line of the present invention is provided in the vicinity of the vertical weakening line,
It is characterized in that it extends from the upper end to the lower end of the fitting wall or from the upper end of the fitting projection to the lower end of the fitting wall. The fitting wall of the present invention is characterized in that a diametrical expansion groove is provided at the lower end portion thereof. A plurality of auxiliary weakening lines of the present invention are provided, and the lengths of the respective auxiliary weakening lines are different.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION The inventor of the present invention creates a portion on the fitting wall that is equivalent to or weaker than the vertical weakening line and is more easily deformed, and if the portion is expanded, the vertical length at the time of tapping is improved. We thought that it was possible to prevent damage to the weakening line. Therefore, an auxiliary weakening line parallel to the vertical weakening line is formed on the fitting wall, and the elastic deformation of this line facilitates the expansion of the diameter of the fitting wall at the time of tapping and reduces the tensile force applied to the vertical weakening line. Planned. The shape, the length, the number of arranging lines, the arranging interval, etc. of the auxiliary weakening line are appropriately selected as necessary. Further, a diameter-increasing groove is formed in the lower end portion of the fitting wall so that the diameter can be easily increased at the time of tapping so as to absorb the outward force.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described with reference to FIGS. The inner plug 1 is formed of a synthetic resin such as polyethylene or polypropylene. This inner plug 1 is a fitting wall 2
And an inner ring 4 connected via the fitting wall 2 and the upper wall 3.

The fitting wall 2 has a fitting projection 5 and a longitudinal weakening line 7.
And are provided. This fitting protrusion 5 is used for the container mouth 2.
The inner peripheral surface 2 of the fitting wall 2 is a portion that is locked in the fitting recess of 0.
It is provided in A. The longitudinal weakening line 7 is a V-shaped thin portion formed on the inner peripheral surface 2A side of the fitting wall 2 and extending from the upper end 2a to the lower end 2b, and the upper end 7a is formed on the upper wall 3. It is continuous with a slit (not shown). In addition,
The vertical weakening line 7 does not necessarily have to be formed by a V-shaped thin portion, and may be formed by, for example, a trapezoidal thin portion, perforations, or slits.

The thickness of the longitudinal weakening line 7 is gradually increased from the upper end 7a toward the lower end 7b, and the lower end 7b side is less likely to break than the upper end 7a.

An auxiliary weakening line 9 parallel to the vertical weakening line 7 is provided on the inner peripheral surface 2A of the fitting wall 2. The line 9 has an upper end 2 formed on the inner peripheral surface 2A side of the fitting wall 2.
It is a V-shaped thin portion extending from a to the lower end 2b. The auxiliary weakening line 9 is provided in the vicinity of the vertical weakening line 7 of the fitting wall 2 and is located at a place slightly apart from the knob 10, and its wall thickness is the same as the vertical weakening line 7. It is formed in the same thickness. This wall thickness is appropriately selected according to need, and is formed to be slightly thinner than the vertical weakening line 7, for example. In FIGS. 1 and 2, 11 is a circumferential weakening line connected to the slit,
Reference numeral 14 denotes an outer lid, respectively.

Next, the operation of this embodiment will be described. When the inner stopper 1 to which the outer lid 14 is attached in advance is press-fitted into the container mouth portion 20 by a capping device (not shown), the fitting projection 5 is fitted into the mouth portion 2.
It is pushed to 0 and displaced outward. Therefore, the diameter of the fitting wall 2 is expanded, and a large tensile force is applied to the longitudinal weakening line 7.

At this time, since the auxiliary weakening line 9 is also pulled and elastically deformed at the same time, the diameter of the fitting wall 2 is easily expanded.
Therefore, the tensile force applied to the vertical weakening line 7 is reduced, so that the vertical weakening line 7 does not break.

At the time of separate collection, the outer lid 14 is removed from the inner plug 1, the knob 10 is grasped with a finger and pulled down from the upper end 2a to the lower end 2b, and the longitudinal weakening line 7 is broken.

At this time, the vertical weakening line 7 extends from the upper end 7a to the lower end 7b.
Since it gradually becomes thicker toward the upper end, the upper end 7a side is in a state of being easily torn. Therefore, the tab 10
When a force in the pulling direction is applied to the vertical weakening line 7, the vertical weakening line 7 easily begins to break from the upper end 7a.

Next, the knob piece 10 is pulled in the circumferential direction to break the circumferential weakening line 11. At this time, the pulling portion 2p of the fitting wall 2 is gradually separated from the mouth portion 20. Further, when the picking piece 10 is pulled up obliquely upward, the inside plug 1 is removed from the mouth portion 20.

A second embodiment of the present invention will be described with reference to FIGS. 3 and 4. The same reference numerals as those in FIGS. 1 and 2 have the same names and functions. The difference between this embodiment and the first embodiment (FIGS. 1 and 2) is as follows. The auxiliary weakening line 29 is formed by perforations, and the auxiliary weakening line 29 is provided inside the picking piece 10 in the vicinity of the vertical weakening line 27.

A third embodiment of the present invention will be described with reference to FIGS. 5 and 6, and the same reference numerals as those in FIGS. 1 and 2 have the same names and functions. The difference between this embodiment and the first embodiment (FIGS. 1 and 2) is that the first auxiliary weakening line 9 and the second auxiliary weakening line 39 are provided on both sides of the vertical weakening line 7.
Both lines 9 and 39 are formed in the same shape as the vertical weakening line 7, but these shapes do not necessarily have to be the same. For example, the first auxiliary weakening line 9 may be formed on the inner peripheral surface of the fitting wall 2. The V groove may be formed on the 2A side, and the vertical weakening line 7 and the second auxiliary weakening line 39 may be formed on the outer peripheral surface 2B side. The number of auxiliary weakening lines is not limited to two, and the number of the auxiliary weakening lines can be appropriately increased if necessary.

A fourth embodiment of the present invention will be described with reference to FIGS. 7 and 8. The same reference numerals as those in FIGS. 1 and 2 have the same names and functions. The difference between this embodiment and the first embodiment is as follows. The auxiliary weakening line 49 is separated from the vertical weakening line 47 by the width of the knob 10 or more, for example, the angle θ = in the circumferential direction.
They are separated by 30 degrees, and the vertical weakening line 47 and the auxiliary weakening line 49 are V-shaped grooves formed on the outer peripheral surface 2B side of the fitting wall 2.

A fifth embodiment of the present invention will be described with reference to FIG. 9. The same reference numerals as those in FIGS. 1 and 2 have the same names and functions. The difference between this embodiment and the first embodiment (FIGS. 1 and 2) is the length and number of auxiliary weakening lines. That is, the auxiliary weakening line 59 in the present embodiment extends from the upper end of the fitting projection 5 to the lower end 2b of the fitting wall 2, and is provided in plurality at intervals in the circumferential direction. The fitting protrusion 5 is pressed outward with a large force at the time of plugging, but since this portion is easily expanded, the diameter expansion is performed reasonably, so that the outward pressing force can be released.

A sixth embodiment of the present invention will be described with reference to FIG. 10. The same reference numerals as those in FIGS. 1 and 2 have the same names and functions. This embodiment and the first embodiment (FIGS. 1 and 2)
The difference is that the enlarged diameter groove 70 is provided in the lower portion of the fitting wall 2. A plurality of the enlarged diameter grooves 70 are provided in parallel with the auxiliary weakening line 9 at intervals in the circumferential direction, but slits or perforations may be used instead of the enlarged diameter grooves.

By providing the enlarged diameter groove 70, the lower portion of the fitting wall 2 is easily expanded at the time of tapping, so that the force applied to the vertical weakening line 7 is absorbed more than in the case of only the auxiliary weakening line 9. be able to. Therefore, the vertical weakening line will not be damaged even if the plugging work is performed during the winter season when the synthetic resin inner plug becomes hard and the elasticity decreases.

The embodiment of the present invention is not limited to the above, and for example, the length of the auxiliary weakening line can be appropriately determined as necessary. When using a plurality of auxiliary weakening lines, the length of each line may be different. Further, the vertical weakening line, the auxiliary weakening line, the shape of the enlarged diameter groove, and the like are appropriately selected as necessary, and for example, a trapezoidal thin portion, a perforation, and the like are selected.

[0025]

As described above, according to the present invention, since the auxiliary weakening line is provided, the diameter of the fitting wall can be easily expanded at the time of tapping. Therefore, since the tensile force applied to the vertical weakening line is reduced, the vertical weakening line does not break.

[Brief description of drawings]

FIG. 1 is a partially sectional front view showing a first embodiment of the present invention.

FIG. 2 is a diagram showing a part of a cross section taken along line II-II of FIG.

FIG. 3 is a front view showing a second embodiment of the present invention.

FIG. 4 is a diagram showing a part of a cross section taken along line IV-IV of FIG. 3.

FIG. 5 is a front view showing a third embodiment of the present invention.

6 is a diagram showing a part of a sectional view taken along line VI-VI of FIG.

FIG. 7 is a front view showing a fourth embodiment of the present invention.

8 is a diagram showing a part of a sectional view taken along the line VIII-III of FIG.

FIG. 9 is a partial cross-sectional front view showing a fifth embodiment of the present invention.

FIG. 10 is a partially sectional front view showing a sixth embodiment of the present invention.

[Explanation of symbols]

1 inside plug 2 fitting wall 2a upper end 2b bottom 3 Upper wall 5 mating ridges 7 Vertical weakening line 9 Auxiliary weakening line 70 Expanded groove

Claims (7)

[Claims] 1. A separable recovery inner stopper comprising: a fitting wall made of synthetic resin having a fitting ridge on an inner surface thereof; and a longitudinal weakening line extending from an upper end side to a lower end of the fitting wall. A separable recovery stopper, wherein the wall is provided with an auxiliary weakening line facing the vertical weakening line. 2. The separable recovery stopper according to claim 1, wherein the auxiliary weakening line is provided in the vicinity of the vertical weakening line. 3. The separative recovery stopper according to claim 1, wherein the auxiliary weakening line extends from the upper end side to the lower end of the fitting wall. 4. The auxiliary weakening line extends from the upper end of the fitting projection to the lower end of the fitting wall.
Stopper during separation and collection described. 5. The separative recovery and recovery plug according to claim 1, wherein the fitting wall is provided with a diametrical expansion groove at a lower end thereof. 6. The separative recovery stopper according to claim 1, 2, 3 or 4, wherein a plurality of auxiliary weakening lines are provided. 7. The separative recovery stopper according to claim 6, wherein the plurality of auxiliary weakening lines have different lengths.