JP6747090B2 - Cap structure and packaging container using the same - Google Patents

Description

The present invention relates to a cap structure capable of sealing a container having an opening such as a bottle in a hermetically sealed state and resealing after opening, and a packaging container using the cap structure.

Patent Document 1 describes a cap including an inner stopper attached to the mouth of a bottle-shaped container and a screw-type lid that is detachable from the inner stopper. In the cap described in Patent Document 1, the detaching portion surrounded by the fragile weakening portion is provided in the inner plug, and the upper end of the detaching portion is held by the holding portion provided in the lid, and the lid is opened in the opening direction. An engaging portion is provided which allows the detaching portion and the holding portion of the lid to be engaged with each other as the lid rotates. With such a configuration, simply by rotating the lid in the opening direction, the rotational force applied to the lid is transmitted to the detaching portion, the weakened portion around the detaching portion is broken, and the spout is formed in the inner plug. In addition, the detached detached portion can be held inside the lid without falling off.

JP, 2016-8058, A

Like the cap described in Patent Document 1, in the configuration in which the upper portion of the detaching portion detached from the inside plug is inserted and held in the holding portion provided in the lid, in order to increase the holding force of the detaching portion by the holding portion, It is necessary to increase the rigidity of the upper part of the detached portion. Therefore, as described in Patent Document 1, the upper portion of the retained detaching portion has a closed shape, and the meat-thickness portion is provided in the lower portion of the detachable portion (that is, the portion that faces the inside of the container when attached to the container). Is common.

However, if a concave portion such as a meat stealing portion is provided in the portion facing the inside of the container when it is attached to the container, the contents filled in the container will enter the concave portion, so that the contents entered into the concave portion will open when the lid is opened. There is a case where it drips, and the usability is impaired.

Therefore, an object of the present invention is to provide a cap structure capable of opening the inner plug only by rotating the overcap in the opening direction and suppressing the liquid dripping when the lid is opened.

The present invention relates to a cap structure for sealing a container having an opening, and an inner cap attached to the opening is screwed onto an outer peripheral surface of the inner cap by rotating the inner cap around a predetermined rotation axis. And an overcap. The inner cap has a base portion having a mounting portion to be attached to the container, a screw portion with which the overcap is screwed, and a tubular shape having a rotation axis as a central axis, and one end is connected to the base portion. , The other end is open, and a separating part that is connected to the pouring part through a rupturable thin bridge part and closes the pouring part together with the bridging part. The overcap has a screw portion that is screwed into the base portion, and a shaft body that projects from the inner portion of the top portion of the overcap along the rotation axis. The separating portion has a fitting hole having an opening on the other end side of the pouring portion, and has a cylindrical shape in which the side opposite to the opening is closed by the bottom portion. The tip portion of the shaft body is fitted into the fitting hole of the separating portion to form a fitting structure. The fitting structure of the shaft body and the separating portion is such that the shaft body and the separating portion in the direction parallel to the rotation axis. Not only the relative movement of the separation body and the relative rotation of the shaft body and the separation portion around the rotation axis are regulated, but the outer diameter of the separation portion and the inner diameter of the pouring portion are substantially the same. The outer surface of the bottom of the section is formed in a tapered cone shape .

A packaging container according to the present invention includes a container having an opening and the cap structure described above, and the mounting portion provided on the base portion of the inner cap is mounted on the opening of the container.

According to the present invention, it is possible to provide a cap structure in which the inner plug can be opened simply by rotating the overcap in the opening direction, and liquid dripping when the lid is opened can be suppressed.

Front view of a packaging container using a cap structure according to an embodiment Sectional drawing which follows the II-II line shown in FIG. An enlarged view of the X part shown in FIG. Sectional drawing which follows the IV-IV line shown in FIG. The figure explaining the opening process of the cap structure which concerns on embodiment. The figure explaining a part of manufacturing process of the cap structure which concerns on embodiment.

FIG. 1 is a front view of a packaging container using the cap structure according to the embodiment.

The packaging container 5 includes a bottle-shaped container 4 having an opening (not shown) and a cap structure 1 that seals the opening of the container 4. The cap structure 1 is composed of an inner cap 2 attached to the opening of the container 4 and an overcap 3 screwed onto the inner cap 2.

2 is a cross-sectional view taken along line II-II shown in FIG. 1, FIG. 3 is an enlarged view of a portion X shown in FIG. 2, and FIG. 4 is a IV-IV line shown in FIG. FIG. The axis AX shown in the drawing is a rotation axis when the overcap 3 is screwed onto the inner cap 2. In the present embodiment, the axis AX, the center axis of the inner cap 2, the center axis of the overcap 3, and the center axis of the container 4 coincide with each other.

<Composition of inner cap>
The inner cap 2 is a resin integrally-molded product, and includes a base portion 9, a spout portion 10, and a separation portion 12 connected to the spout portion 10 via a bridge portion 13. As the resin forming the inner cap 2, it is preferable to use linear low-density polyethylene (LLDPE), low-density polyethylene (LDPE), or a mixture thereof.

The base portion 9 is composed of an attachment portion 7 attached to the opening 6 of the container 4 and a screw portion 8.

The mounting portion 7 has a substantially cylindrical shape, and is fixed to the container 4 by being fitted into the opening 6 while sandwiching the opening 6 of the container 4. A contact ring (not shown) is provided along the entire circumference in the portion of the mounting portion 7 facing the upper end surface of the opening 6 of the container 4, and the entire circumference of the contact ring is By closely contacting the upper end surface of the opening 6 of the container 4, the space between the container 4 and the inner cap 2 is sealed. In the present embodiment, the mounting portion 7 is mounted in the opening 6 of the container 4 by fitting, but the mounting portion 7 and the opening 6 of the container 4 are provided with screw threads that can be screwed. May be screwed into the opening 6.

The screw portion 8 has a substantially cylindrical shape and is connected to the mounting portion 7. On the outer peripheral surface of the screw portion 8, a male screw that can be screwed into the overcap 3 is provided.

The spout 10 has a tubular shape (tube shape) with the axis AX as the central axis. One end 11 a of the spout 10 is connected to the threaded portion 8 of the base 9. The other end 11b of the spout 10 is an open end. In addition, in this embodiment, the pouring part 10 points out the part whose inner diameter is substantially constant.

The separation portion 12 is a bottomed cylindrical member having the axis AX as a central axis, and the fitting hole 14 having an opening facing the end 11b side of the pouring portion 10 and the opening of the fitting hole 14 are separated from each other. It has a bottom 15 on the opposite side. The maximum outer diameter of the separating portion 12 is set to be equal to or less than the minimum inner diameter of the pouring portion 10. As shown in FIG. 3, the separating portion 12 is connected to the end portion 11 a of the pouring portion 10 via the bridge portion 13. The bridge portion 13 is a breakable portion to be broken when the overcap 3 is opened when the packaging container 5 is opened, and is formed into a thin wall that can be broken by the force applied to the overcap 3 and is separated. The outer peripheral surface of the portion 12 and the inner peripheral surface of the pouring portion 10 are connected over the entire circumference. The bottom portion 15 of the separating portion 12 is formed in a tapered cone shape (conical shape in the present embodiment).

<Overcap composition>
The overcap 3 is a resin integrally molded product, and includes a threaded portion 16 that is screwed into the threaded portion 8 of the base portion 9, and a rod-shaped shaft body 18 that projects from the inside of the top portion 17 along the axis AX. In order to suppress the elongation and deformation of the overcap 3 at the time of opening, a resin such as polypropylene (PP) or high density polyethylene (HDPE) is used as the resin forming the overcap 3. In order to provide rigidity, it is preferable to use a material having a high bending elastic modulus to form a thick wall, and it is particularly preferable to make a screw portion to which torque (load) is applied thicker than other portions.

The shaft body 18 is, in order from the tip to the top portion 17 side, a first shaft portion 20a having a substantially circular cross section and a second shaft that is connected to the first shaft portion 20a and has a cross section that is a spline shaft having a gear shape. It is composed of a part 20b and a third shaft part 20c connected to the second shaft part 20b and the top part 17. As shown in FIGS. 2 and 4, the fitting hole 14 of the separating portion 12 has a shape corresponding to the first shaft portion 20 a and the second shaft portion 20 b of the shaft body 18, and is the first shaft portion of the shaft body 18. The shaft portion 20a and the second shaft portion 20b are fitted in the fitting holes 14 of the separating portion 12. The cross-sectional shape of a predetermined range from the opening of the fitting hole 14 is substantially the same gear shape as the cross-sectional shape of the spline shaft of the second shaft portion 20b, and some gears of the second shaft portion 20b and the fitting hole 14 are included. The shapes are in mesh. Further, the shaft body 18 is prevented from coming off from the fitting hole 14 by the first shaft portion 20a having a substantially circular cross section. It should be noted that the second shaft portion 20b and a part of the fitting hole 14 that fits into the second shaft portion 20b do not necessarily have to have a gear-shaped cross section as shown in FIG. 4, and the direction parallel to the axis AX and the axis AX are not necessary. Any shape may be used as long as it can prevent relative movement of the shaft body 18 and the separating portion 12 in the rotational direction around the center. However, in order to facilitate the alignment at the time of assembling the cap structure 1 described with reference to FIG. 6, the second shaft portion 20b and a part of the fitting hole 14 fitted into the second shaft portion 20b are rotationally symmetric. It is preferable that

Further, inside the top 17 of the overcap 3, a cylindrical inner ring 19 surrounding the shaft 18 is provided. The outer diameter of the inner ring 19 is set to be equal to or slightly larger than the inner diameter in the vicinity of the end 11b of the pouring portion 10 of the inner cap 2, and when the packaging container 5 is resealed with the overcap 3 after opening. First, the inner ring 19 is fitted into the pouring portion 10 to seal the pouring portion 10.

<Opening process of packaging container>
FIG. 5: is a figure explaining the opening process of the cap structure which concerns on embodiment.

First, FIG. 5A shows an unopened state of the packaging container 5.

In the unopened state, the contact ring (not shown) provided on the inner cap 2 comes into contact with the upper end surface of the opening 6 of the container 4 between the inner cap 2 and the container 4, as described above. It is sealed. Further, in the unopened state, the pouring part 10 of the inner cap 2 is sealed by the separating part 12 and the bridge part 13.

Next, FIG. 5B shows a state in which the overcap 3 is rotated about the axis AX in the opening direction (counterclockwise direction when viewed from above the overcap 3) by a predetermined amount. The state before screwing of the screw part 16 and the screw part 8 of the inner cap 2 is shown.

As described above, the fitting structure of the shaft body 18 of the overcap 3 and the separating portion 12 of the inner cap 2 restricts the relative movement of the shaft body 18 and the separating portion 12 in the direction parallel to the axis AX, and The relative rotation of the shaft body 18 and the separating portion 12 around AX is regulated. Therefore, when the overcap 3 is rotated in the opening direction from the state of FIG. 45(a) in which the overcap 3 is screwed into the inner cap 2 and completely tightened, the separating portion 12 causes the shaft body 18 of the overcap 3 to rotate. At the same time, the overcap 3 rotates in the opening direction. The rotational force applied to the overcap 3 is transmitted to the bridge portion 13 via the shaft body 18 and the separating portion 12, and when the rotation amount of the overcap 3 becomes a certain amount or more, the entire circumference of the bridge portion 13 is broken. Thereby, as shown in FIG. 5B, the separating unit 12 is separated from the pouring unit 10, and the packaging container 5 is opened. As described above, since the separating portion 12 is locked to the shaft body 18 by fitting with the shaft body 18, the separating portion 12 is prevented from being detached after opening.

FIG. 5C shows a state in which the threaded portion 16 of the overcap 3 and the threaded portion 8 of the inner cap 2 are unthreaded.

As shown in FIG. 5C, by removing the overcap 3 and pulling out the separating portion 12 locked to the shaft body 18 from the pouring portion 10, the contents of the container 4 are poured out from the pouring portion 10. be able to. Further, inserting the separating portion 12 locked by the shaft 18 into the pouring portion 10 and rotating the overcap 3 in the closing direction (clockwise direction when viewed from above the overcap 3) about the axis AX. Allows the container 4 to be resealed.

The difference between the outer diameter of the separating portion 12 and the inner diameter of the pouring portion 10 is preferably made as small as possible. By making the outer diameter of the separating portion 12 and the inner diameter of the pouring portion 10 substantially coincide with each other, liquid or solid matter attached to the inner peripheral surface of the pouring portion 10 after pouring out the content from the pouring portion 10 Etc. can be scraped back into the container 4 by the separating part 12. Such a configuration is suitable for a packaging container for packaging solid contents such as chopped vegetables, herbs and spices, or gel contents.

<Manufacturing process of cap structure>
FIG. 6 is a diagram illustrating a part of the manufacturing process of the cap structure according to the embodiment.

The cap structure 1 is manufactured by integrally molding the inner cap 2 and the overcap 3 with resin in separate steps, and then fitting the overcap 3 to the inner cap 2 by tapping. When fitting the overcap 3 to the inner cap 2, a receiving jig 23 having an outer shape substantially the same as the inner shape of the inner cap 2 is inserted into the inner cap 2 in order to prevent breakage of the bridge portion 13. To support the inner cap 2. Further, in order to prevent the outer surface of the overcap 3 from being damaged, the overcap 3 is housed in a holding jig 24 having an inner shape substantially the same as the outer diameter of the overcap 3. Next, as shown in FIG. 6A, the center axis of the inner cap 2 supported by the receiving jig 23 and the center axis of the overcap 3 held by the holding jig 24 are aligned with each other, and the overcap 3 and The inner caps 2 are pressed toward each other. Due to the pressing force, the female screw rides over the male screw, and as shown in FIG. 6B, the screw portion 16 of the overcap 3 is fitted into the screw portion 8 of the inner cap 2 and the shaft body 18 is fitted into the separating portion 12. The fitting hole 14 is fitted. Thereafter, the cap jig 1 is completed by removing the receiving jig 23 and the holding jig 24. The completed cap structure 1 is attached to the opening of the container filled with the contents by fitting or screwing, and the packaging container 5 shown in FIG. 1 is completed.

Then, in order to facilitate the fitting of the inner cap 2 and the overcap 3 by tapping, the number of threads of the screw portion 8 of the inner cap 2 and the screw portion 16 of the overcap 3 is 3 to 4. Preferably. The number of threads of the screw portion 8 of the inner cap 2 and the screw portion 16 of the overcap 3 can be appropriately set according to the diameter of the container.

As described above, according to the cap structure 1 according to the present embodiment, the separation portion 12 of the inner cap 2 can be poured out only by rotating the overcap 3 in the opening direction by a predetermined amount from the completely closed state. The separated part 12 can be separated and opened from the part 10, and the separated part 12 can be firmly locked (fitted) to the shaft body 18 of the overcap 3. Therefore, according to the present embodiment, it is possible to realize the cap structure 1 that can be easily opened and can prevent the separation portion 12 from falling off even if the overcap 3 is repeatedly opened and closed. Then, even if the content adheres to the pouring part 10 after use, upon resealing, it is pushed back into the container 4 by the separating part 12 fitted to the shaft body 18, so that the sealing property and the liquid running out It is possible to secure the sex.

In addition, since the separation portion 12 of the inner cap 2 that constitutes the cap structure 1 according to the present embodiment is closed by the bottom portion 15 on the container 4 side when attached to the container 4, the overcap 3 is In the unopened state, the contents do not enter the inside of the separating portion 12, and the contents do not drip when opening and reopening. In addition, in the cap structure 1 according to the present embodiment, since there is no space (a recess such as a meat stealing part) in which a solid substance enters on the lower surface of the separating portion 12, a packaging container 5 having excellent appearance and hygiene is configured. it can.

Further, in the present embodiment, since the bottom portion 15 of the separating portion 12 is formed in the shape of a tapered cone, even if the contents of the container 4 adhere to the separating portion 12, the liquid is well drained.

In addition, in the above-mentioned embodiment, the place (the vertical position in FIG. 2) where the pouring part 10 and the separating part 12 are connected by the bridge part 13 is not particularly limited, and the inner diameter of the pouring part 10 is substantially constant. Any part may be used as long as it is a proper part. The closer the bridge portion 13 that connects the pouring portion 10 and the separating portion 12 to the open end (end portion 11b) side of the pouring portion 10, the smaller the insertion amount of the separating portion 12 that has been separated. Easy to open and close. On the contrary, the closer the bridge part 13 connecting the pouring part 10 and the separating part 12 is to the end part 11a side of the pouring part 10, the easier the resin can flow in the mold when the inner cap 2 is molded. ..

INDUSTRIAL APPLICABILITY The present invention can be used for a packaging container that can seal the contents and can be resealed after opening.

DESCRIPTION OF SYMBOLS 1 Cap structure 2 Inner cap 3 Overcap 4 Container 5 Packaging container 6 Opening 7 Mounting part 8 Screw part 9 Base part 10 Outlet part 11a, 11b End part 12 Separation part 13 Bridge part 14 Fitting hole 15 Bottom part 16 Screw Part 17 Top 18 Shaft

Claims (2)

A cap structure for sealing a container having an opening, comprising:
An inner cap attached to the opening,
An overcap screwed onto the outer peripheral surface of the inner cap by rotating about a predetermined rotation axis,
The inner cap is
A base portion having an attachment portion attached to the container, and a screw portion with which the overcap is screwed,
It has a tubular shape with the rotation axis as a central axis, and one end is connected to the base portion, and the other end is open, and a pouring portion,
Connected to the pouring portion via a rupturable thin bridge portion, and having a separating portion that closes the pouring portion together with the bridge portion,
The overcap is
A screw portion screwed into the base portion;
A shaft body protruding from the inner portion of the top portion of the overcap along the rotation axis,
The separating portion has a fitting hole having an opening on the other end side of the pouring portion, and has a tubular shape in which the opposite side to the opening is closed by a bottom portion,
The tip portion of the shaft body is fitted into the fitting hole of the separation portion to form a fitting structure,
The fitting structure of the shaft body and the separation part regulates relative movement of the shaft body and the separation part in a direction parallel to the rotation axis, and the shaft body and the separation part around the rotation axis. Regulates the relative rotation of parts ,
The outer diameter of the separating portion and the inner diameter of the pouring portion are substantially the same,
A cap structure in which an outer surface of the bottom portion of the separation portion is formed in a tapered cone shape . A packaging container,
A container having an opening,
The cap structure according to claim 1, which seals the opening of the container,
A packaging container, wherein the attachment portion provided on the base portion of the inner cap is attached to the opening of the container.

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