JPH0930556A - Cover body for drinking water container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cover body for a drinking water container which is easily produced and excellent in a shielding property against gas and a high grade sense and also suitable for germless charging. SOLUTION: This cover is provided with a cover body 10 made of plastic sheet and furnished with an opening 11 for drinking water, a cap 41 sealing the opening, and a pull-tab 43 continuously connected to the cap 41. The plastic sheet constituting the cover body 10 is bent so as to protrude upward and formed to make a protrusion 13, at the surrounding part of the periphery of the opening 11 of the cover body 1 and the whole outer peripheral part thereof. A recessed fitting part 15 is provided at the side face of the inner peripheral side of the protrusion 13 provided at the periphery of the opening 11 and the second recessed fitting part 21 is provided at a specified position of the side face of the inner peripheral side of the protrusion 13 provided at the outer periphery of the cover body 10. When fitting the cap 41, the outer peripheral edge of the cap is fitted to the fitting part 15. And at the same time, a specified part of the outer peripheral edge of the pull-tab 43 is fitted to the second fitting part 21.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lid for a beverage container formed by molding a plastic sheet.

[0002]

2. Description of the Related Art Conventionally, a beverage container having a structure in which an upper end opening of a cylindrical container is covered with a lid and sealed has been developed and used. A beverage container of this type is filled with a beverage after sterilizing the inside thereof to make a sterile state.

Conventionally, as this type of lid, there has been the following structure. A so-called peelable seal type (membrane type) lid made of a sheet in which a stretched PET (polyethylene terephthalate) film is laminated on the surface of an aluminum foil or the like and an easy peel layer is provided on the surface contacting the container. The lid is attached by heating so as to cover the opening of the upper end of the cylindrical container.

The upper end opening of the container is covered with a sheet or the like, an opening serving as a drinking port is provided in the sheet or the like, and the opening is closed with a pull tab made of a small piece of PET / aluminum foil film having an easy peel layer. A lid that becomes.

A lid formed by drawing aluminum foil.

Manufactured by a so-called insert injection molding technique in which an aluminum foil coated with PE (polyethylene) or the like is inserted into a mold in advance and a lid having a predetermined opening means is formed in the aluminum foil by injection molding. The lid to be used.

[0007]

However, the above-mentioned conventional lid has the following problems. (1) With the membrane type lid as described above, the sealing strength between the lid and the container must be strong in order to withstand the load handling during product transportation, but on the other hand, remove the lid from the container. The opening strength at this time must be appropriately weakened, and it is difficult to balance the two. Further, since the opening when the lid is removed from the container becomes too large, there is an inconvenience such as spilling the drink when drinking the drink in the container while walking.

(2) In the case of the lid body to which the pull tab is attached as described above, although the problem of the above (1) is solved, since the pull tab is composed of a membrane type sheet, the lid body is It gives a so-called cheesy impression without a sense of luxury.

(3) The aluminum foil obtained by drawing is expensive.

(4) It is difficult to provide a gas barrier property to the lid manufactured by injection molding in the process, and in order to solve this, the insert injection molding method as described above is used. However, the process becomes complicated, the manufacturing speed does not increase, and the cost increases.

The present invention has been made in view of the above points, and an object thereof is to endure the handling of a load during transportation of a product, to easily open the product, to be easily manufactured, to have an excellent gas barrier property, and to have a high-class feeling. In addition, the present invention provides a lid for a beverage container suitable for aseptic filling of beverage.

[0012]

In order to solve the above problems, the present invention is directed to a lid made of a plastic sheet, which is formed in a shape to cover an upper end opening of a cylindrical container and has an opening for drinking therein. A lid of a beverage container comprising a main body, a plastic sheet pull cap having a cap portion attached so as to seal the opening of the lid main body, and a pull tab portion provided continuously to the cap portion,
A projecting portion formed by bending a plastic sheet constituting the lid body so as to project upward is provided in a portion surrounding the opening of the lid body, and the inner peripheral side surface of the projecting portion is provided. A fitting portion formed of a recess is provided, and the outer peripheral edge of the cap portion is fitted to the fitting portion when the cap portion of the pull cap is attached so as to seal the opening of the lid body. In addition to the portion surrounding the opening of the lid main body, the protrusion is also provided on the entire outer periphery of the lid main body, and the protrusion is provided at the predetermined position on the inner peripheral side surface of the protrusion provided on the outer periphery of the lid main body. The second fitting portion is provided, and a predetermined portion of the outer peripheral edge of the pull tab portion of the pull cap is fitted to the second fitting portion when the pull cap is mounted on the lid body. Further, in the cap portion, a protrusion having a shape substantially the same as the opening of the lid body and protruding to the container side by a predetermined depth from the opening is formed and provided.

[0013]

Embodiments of the present invention will be described below in detail with reference to the drawings. 1 is an exploded perspective view of a lid of a beverage container according to an embodiment of the present invention. As shown in the figure, the lid body includes a lid body 10 made of a plastic sheet for covering an upper end opening 81 of a cylindrical container 80,
It is composed of a pull cap 40 attached to the lid body 10. Hereinafter, each component will be described.

2 is a side sectional view of the lid body 10 (see FIG. 1).
2 is a cross-sectional view taken along line AA shown in FIG. As shown in FIGS. 1 and 2, the lid body 10 is made of a plastic sheet having gas barrier properties (particularly oxygen barrier properties), that is, PP (polypropylene) / EVOH (ethylene vinyl alcohol copolymer) / PP. It is manufactured by forming a sheet by a sheet forming technique such as vacuum pressure forming method, providing an opening 11 in the shape of a drinking mouth at a predetermined position, and trimming the outer periphery of the sheet into a circle. EVOH has a function of preventing the passage of oxygen.

Here, around the opening 11 and around the entire outer periphery of the lid body 10, there is provided a projecting portion 13 formed by bending the plastic sheet forming the lid body 10 so as to project upward. ing. The protruding portion 13 is not provided only on the portion where the connecting portion 45 of the pull cap 40 described below is placed.

The projecting portion 1 provided around the opening 11
On the side surface on the inner peripheral side of 3, there is provided a fitting portion 15 formed of a recess over substantially the entire length thereof.

Further, the protruding portion 1 provided on the outer periphery of the lid body 10
Predetermined position on the inner side surface of 3 (pull cap 4 described below
The second fitting portion 21 formed of a recess is also provided at a portion (where the outer peripheral edge of the 0 pull tab portion 43 abuts).

The opening 11 and the protruding portion 1 of the lid body 10
The surface of the portion where 3 does not exist is a concave portion 23, and the surface of the concave portion 23 is formed to be lower than the surface of the portion where the opening 11 is provided. The rear surface of the protruding portion 13 provided on the outer periphery of the lid body 10 is a groove 19 (see FIG. 2).

Next, FIG. 3 is a view showing the pull cap 40. FIG. 3 (a) is a side view, FIG. 3 (b) is a plan view, and FIG. 3 (c) is the pull cap 40 seen from the back side. A perspective view and the same figure (d) are the BB cross-section enlarged views of the same figure (b).

As shown in FIG. 1 and FIG. 1, the pull cap 40 is a plastic sheet similar to the lid body 10 (that is, a PP / EVOH / PP sheet having a gas barrier property).
Prepare a sheet with a resin layer with easy peeling on one side and a resin layer with excellent heat resistance such as polycarbonate on the other side, and mold by sheet molding technology such as vacuum pressure molding method It is manufactured by trimming the outer circumference.

The pull cap 40 corresponds to the lid body 10
A cap portion 41 having a shape for closing and sealing the opening 11 of
The pull tab portion 43 is continuously provided to the cap portion 41 via a connecting portion 45.

At the center of the cap portion 41, there is provided a relatively deep protrusion 47 having a substantially triangular shape which is substantially the same as the opening 11 provided in the lid body 10 and projecting a predetermined depth below the opening 11. Molded.

On the other hand, in the center of the pull tab portion 43, a relatively shallow recess 49 projecting downward is provided, and four parallel ridges 51 are provided therein.

To assemble this lid, first, as shown in FIG. 1, the cap portion 41 of the pull cap 40 is mounted on the opening 11 of the lid body 10. At this time, substantially the entire outer peripheral edge of the cap portion 41 is fitted into the fitting portion 15, and at the same time, a part of the outer peripheral edge of the pull tab portion 43 is fitted into the second fitting portion 21.

Then, the cap portion 41 is welded to the periphery of the opening 11 on the upper surface of the lid body 10 by a known welding means to complete the lid body (see FIG. 4).

The lid is attached so as to cover and seal the upper end opening 81 of the container 80 filled with the liquid beverage.

Specifically, by fitting the groove 19 (see FIG. 2) on the lower surface of the outer periphery of the lid main body 10 to the upper end side 83 of the container 80 shown in FIG. It is attached by sealing and fixing by known welding means.

FIG. 5 is a schematic side sectional view of a main part showing a state in which the lid is mounted on the container 80 as described above.

When the lid is opened, a finger is pushed into the recess 49 of the pull tab portion 43 of the pull cap 40, whereby the pull tab portion 4 as shown by a dotted line in FIG.
With the end of 3 facing upward, pinch the end and pull upward.

As a result, the portion of the easy peel layer provided on the lower surface of the cap portion 41 is peeled off from the welded surface around the opening 11 of the lid body 10, the cap portion 41 is easily peeled off, and the opening 11 is opened. It

By the way, in the case of the present embodiment, since the pull cap 40 is provided with the projection 47 having a shape that projects into the container 80 to a predetermined depth from the opening 11 of the lid body 10, the pull cap 40 is opened. At this time, even if the surface of the beverage inside the container 80 shakes and tries to overflow from the opening 11,
Since 7 interferes, the trouble that the beverage overflows from the opening 11 hardly occurs.

Further, in the case of the embodiment, the surface of the lid body 10 on which the opening 11 is provided and the projecting portion 13 on the outer circumference of the lid body 10.
Since the difference in level between and is small, the beverage inside the container 80 is easy to drink, and the rest of the beverage is less likely to accumulate inside the protrusion 13.

Further, in the present invention, the opening 11 can be resealed by fitting the removed cap portion 41 of the pull cap 40 into the fitting portion 15 of the lid body 10 again. Therefore, even when it is desired to stop drinking the beverage on the way, the opening 11 can be easily closed.

Further, in the present invention, the lid body 10 does not need to be peeled off from the container 80, so that the welding strength between the two can be increased. On the other hand, it is only the portion of the cap portion 41 of the pull cap 40 attached to the opening 11 that the easy peel layer is provided to facilitate the stripping. However, since the opening 11 is small, even if the pull cap 40 is provided with an easy peel layer that can be easily peeled off, the pull cap 40 can easily withstand damage during transportation.

By the way, the lid according to the present invention has the following advantages in the manufacturing process thereof.

As shown in FIG. 6, the position at which the fitting portion 15 of the lid body 10 and the outer peripheral edge of the pull cap 40 are fitted is
It is located outside the portion where the pull cap 40 and the lid body 10 are welded. Therefore, when the container 80 and the lid are sterilized, the structure is easily sterilized. This will be specifically described below.

Here, FIG. 7 is an enlarged cross-sectional view of a main part showing a comparative example. In this comparative example, a fitting portion 145 is provided on the pull cap 140 side, and the fitting portion 145 is provided on the lid body 11.
No. 0 opening 111 is fitted and attached, and the outer peripheral lower surface of the pull cap 140 is attached to the opening 111 of the lid main body 110.
It is configured to be welded to the upper surface around. Therefore, the position where both are fitted is inside the welded portion of both.

Here, when the lid body before being attached to the container is sterilized, the lid body is washed with a medicine to sterilize it. As shown in FIGS. 6 and 7, the pull cap 4 is used.
Since the pockets a and b are formed at the portions where the 0 and 140 and the lid bodies 10 and 110 are fitted, it is not possible to sterilize without entering the chemicals into the pockets a and b, or the inside of the pockets a and b. Even if the drug is sterilized by entering the drug, the drug used for the sterilization may remain in the pockets a and b.

If the lid having the structure shown in FIG.
When it is attached to 0, since the pocket b is located inside the container 80 as shown in the same figure, there is a possibility that bacteria and medicine in the pocket b may get into the container 80.

On the other hand, in the case of the present invention, as shown in FIG. 6, since the pocket a is located outside the container 80, even if bacteria or medicine remain in this portion,
There is no risk of these entering the container 80.

Since both the lid body and the pull cap according to the present invention are manufactured by heat-molding a sheet, due to the manufacturing process, the history of heat remaining on the sheet causes the sheet to change and shrink over time. There is a nature to go. Therefore, the size at the time of manufacture differs from the size after cooling, and there is a possibility that when the pull cap is attached to the lid body by welding, the attachment cannot be performed properly.

However, in the present invention, as shown in FIG. 6, since the outer peripheral edge of the pull cap 40 is fitted to the fitting portion 15 provided in the lid body 10, the pull cap 40 is cooled and contracted. Even if the outer peripheral edge of the pull cap 40 does not surely enter the fitting portion 15, the contracted pull cap 40 expands in the direction of the arrow D by heating at the time of welding. Since it is securely fitted in the housing 15 and is welded and fixed in this state, the fitted state does not change even when cooled again, and a good fitted state can be obtained.

In the case of the embodiment described above, as shown in FIG. 6, the upper edge 83 of the container 80 is fitted in the groove 19 on the lower surface of the outer periphery of the lid body 10. That is, the lid body 10 can be temporarily fixed to the container 80 and integrated.

Therefore, a sterilized lid body (that is, the lid main body 1 to which the pull cap 40 has been welded) is placed in the container 80 whose interior is sterilized.
If it is transported to a filling factory or the like in a state where it is temporarily fixed with 0) covered, there is no risk of dust and the like entering the inside of the container 80, and the beverage is filled into the container 80 at the filling factory. The step of washing the inside of the container 80 before the step becomes unnecessary, which is preferable.

On the other hand, conventionally, since the container and the lid were separately transported to the filling factory, it was general and complicated to wash the inside of the container in the filling factory. When the lid is transported separately from the container, there are a device for unpacking the packed lid, a belt conveyor device for carrying the lid to a liquid filling machine, a loading device for feeding the lid to the filling machine, and the like. Although necessary, in the above-described embodiment, it is sufficient to provide a so-called decapper device for removing the lid body from the container in the filling machine, and the above various devices are unnecessary.

Next, FIG. 8 is a plan view showing a pull cap 40-2 according to another embodiment of the present invention. The pull cap 40-2 is different from the pull cap 40 shown in FIG. 1 only in that a linear cut 53 having a predetermined shape is provided in the pull tab portion 43-2. If the notch 53 is provided in this way, the pull cap 4
When the 0-2 is removed from the lid body 10 (see FIG. 1), the notch 53 can be scratched and stopped by the protrusion 13 (see FIG. 1) on the outer periphery of the lid body 10,
It is possible to prevent the pull cap 40-2 from being discarded carelessly.

[0047]

As described in detail above, the present invention has the following excellent effects. Since it is manufactured by molding a sheet, it is possible to easily provide the lid with a gas barrier property and to provide a high-quality lid in large quantities at low cost.

Even when drinking is interrupted on the way, the opening of the pull cap can be easily closed by fitting the cap portion of the removed pull cap to the fitting portion provided around the opening of the lid body. it can.

Due to its structure, poor sterilization is unlikely to occur, and the sterilizing agent does not remain in the container.

Since the lid main body and the container can be firmly welded to each other, they can withstand damage during transportation and can be easily opened.

In the case where the pull cap is formed with a projection having a shape that projects into the container by a predetermined depth from the opening of the lid body,
When the pull cap is peeled off, the beverage inside does not easily overflow from the opening.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a lid of a beverage container according to an embodiment of the present invention.

FIG. 2 is a side sectional view of the lid body 10 (a sectional view taken along the line AA shown in FIG. 1).

FIG. 3 is a view showing a pull cap 40, and FIG.
Is a side view, (b) is a plan view, (c) is a perspective view of the pull cap 40 as seen from the back side, and (d) is an enlarged cross-sectional view taken along the line BB of (b) of FIG. is there.

FIG. 4 is a plan view of a lid.

FIG. 5 is a schematic side sectional view of an essential part showing a state where a lid is attached on a container 80.

FIG. 6 is an enlarged cross-sectional view of an essential part showing the vicinity of the portion where the outer peripheral edge of the pull cap 40 is fitted into the fitting portion 15 of the lid body 10.

FIG. 7 is an enlarged cross-sectional view of a main part of a comparative example.

FIG. 8 is a plan view showing a pull cap 40-2 according to another embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Lid main body 11 Opening 13 Projection part 15 Fitting part 21 Second fitting part 40 Pull cap 41 Cap part 43 Pull tab part 47 Projection part 80 Container 81 Upper end opening part

Front page continuation (72) Inventor Kazuya Ono 2-21-19 Akasaka, Minato-ku, Tokyo Inside Japan Tetra Pak Co., Ltd.

Claims (3)

[Claims] 1. A lid main body made of a plastic sheet, which is formed in a shape to cover an upper end opening of a cylindrical container and has an opening serving as a drinking port therein, and is attached so as to seal the opening of the lid main body. In a lid of a beverage container comprising a plastic sheet pull cap having a cap portion and a pull tab portion continuously provided to the cap portion, a lid body is provided in a portion surrounding the periphery of the opening of the lid body. Is provided with a protrusion formed by bending the plastic sheet forming the above so as to protrude upward, and a fitting portion made of a recess is provided on the inner peripheral side surface of the protrusion, and the cap of the pull cap is provided. A lid for a beverage container, wherein an outer peripheral edge of the cap portion is fitted to the fitting portion when the portion is attached to seal the opening of the lid body. 2. The protrusion is provided not only on the portion surrounding the opening of the lid body but also on the entire outer periphery of the lid body, and on the inner peripheral side surface of the protrusion provided on the outer periphery of the lid body. A second fitting portion having a recess is provided at a position, and a predetermined portion of an outer peripheral edge of the pull tab portion of the pull cap is fitted to the second fitting portion when the pull cap is mounted on the lid body. The lid of the beverage container according to claim 1. 3. The cap portion is formed by forming a protrusion having a shape that is substantially the same as the opening of the lid main body and protrudes toward the container side by a predetermined depth from the opening. The lid of the beverage container according to claim 1 or 2.