JP2743160B2 - Combination structure of bottle cap and synthetic resin cap - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a combination structure of a bottle cap and a synthetic resin cap, which is mounted on a bottle cap to seal a container. A container in which the inside of the container is not in a pressurized or depressurized state when sealed, for example, a beverage circulated in a chilled manner represented by a milk beverage, and a combination structure of a bottle of a container such as a powder, a granule and a tablet and a synthetic resin cap. Things.

[0002]

2. Description of the Related Art At present, the structure of a mouth for sealing a mouth of a container and the structure of a cap attached to the mouth are of various structures corresponding to the purpose of sealing and the required level of functions. Have been. However, at the stage of distributing goods to the market by filling the contents with caps and distributing to the market, for example, chilled beverages represented by milk beverages, and powders, granules, tablets handled at room temperature And the like, there are many objects that do not need to maintain the internal pressure or reduced pressure in the container.

The functions and quality required for sealing the mouth of these containers are as follows: "the structure of the container and the cap are simple and the moldability is good";"the cost of the container and the cap is inexpensive";"The process is simple", "No leakage of contents at the stage of product distribution", "It has tamper-evident performance", "Easy opening",
"Recapping (resealing) and no leakage"
If the container is a glass bottle, there may be mentioned, for example, that the entire cap can be easily detached from the bottle, so that the bottle is easily collected and used or recycled as resources.

However, the combination of bottles and caps currently widely used does not fully satisfy all of the above requirements, for example, the cost of caps is low in the case of traditionally used milk bottles. Although capping is easy, a step of covering the mouth with a film after capping is required to maintain tamper-evident properties. In addition, since the mouth of the bottle must be provided with a thick middle-stage shape for attaching a cap, the bottle becomes lighter, that is, it has a negative effect on cost reduction. It has drawbacks such as ease.

[0005] Further, in other containers, if the bottle mouth is shaped like a screw mouth or a pill-proof proof mouth, this is one factor that reduces the moldability of the container or the cap, or the cap is not provided with the container mouth. Introducing an expensive and complicated capper device having a predetermined function for capping, requiring an inner seal to maintain airtightness, a need to shrink the mouth to maintain tamper-evident sealability Installation and maintenance are required,
Had some problems.

[0006]

SUMMARY OF THE INVENTION The present invention relates to a bottle bottle which solves the above-mentioned problems at once in a combination of a mouth portion of a target container which does not need to maintain the internal pressure and reduced pressure, and a cap attached thereto. An object is to provide a combination structure of a synthetic resin cap.

[0007]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention is directed to a bottle opening, an upper groove and a lower groove provided on an outer peripheral portion thereof, a bottle top surface and a bottle opening. In a combined structure with a synthetic resin cap to be engaged with the inner surface, the synthetic resin cap comprises a one-piece cap, and includes an upper lid, a tamper-evidence band, a lower end of the upper lid, and a tamper-evidence band. The upper lid portion is formed of a thin-walled side score portion circumferentially connected to the upper end, and the upper lid portion projects from a cylindrical portion hanging down from a circular top surface periphery and a part of the lower end peripheral edge of the cylindrical portion. a set has been flange, the inner tube annulus is fitted in close contact with the inner bottle mouth with greater compression state by capping in nature than pendent Binguchi inner diameter from the top surface inner surface, the lower end of the inner wall of the front Symbol tubular portion Provided in the vicinity so as to engage with the upper peripheral groove of the bottle opening The tamper-evident band portion has a circumferential protruding ring that engages with the lower peripheral groove of the bottle opening portion on an inner wall thereof, and a thin-walled thickness that longitudinally cuts through the tamper-evident band portion. a vertical score of, and a knob portion that is kicked set adjacent to the upper end side of the vertical score portion, further, its knob portion and the upper lid portion, are articulated with scissile narrow bridge And the above tamper
The inner diameter of the evidence band is the inner diameter of the cylindrical part of the upper lid
It is characterized by being formed larger .

The synthetic resin cap of the present invention is made of a synthetic resin which is elastically deformed, for example, polyethylene, polypropylene, polystyrene (styrene resin), polyvinyl chloride (vinyl chloride resin), polyvinyl acetate, methacrylic resin, polyamide (nylon, etc.), Any polyester (such as PET) or ABS resin may be used, and polyethylene is most preferable. It is most preferable that the material of the container to which the cap is attached is glass, but it is sufficient that the mouth of resin, metal or the like is made of a rigid material.

[0009]

Embodiments of the present invention will be described below with reference to the illustrated embodiments. FIGS. 1A and 1B show the configuration of the bottle mouth of the present invention, wherein FIG. 1A is a plan view and FIG. 1B is a side view. The bottle portion 10 includes a bottle inner surface 11 constituting a bottle inner wall, a lip portion 12 having a bottle top surface 12a, an upper circumferential groove 13, a beat 14, a lower circumferential groove 15, a seat portion 16 and a ring portion 17, respectively. They are connected in a perfect circular shape.

FIG. 2 shows the structure of the synthetic resin cap of the present invention to be attached to the bottle opening 10 shown in FIG.
(A) is a bottom view, and (b) is a side view showing a partial cross section. As a basic configuration, the cap 20 includes an upper lid portion 21 and a tamper-evidence band portion 22. The upper lid portion 21 and the tamper-evidence band portion 22 are connected over the entire circumference by a thin side score portion 23 that is easily severable. Has become the cap of the piece.

The upper lid portion 21 has a cylindrical portion 24 hanging down from the peripheral edge of the circular top surface 21a, and a flange 30 is protruded from a part of the outer periphery of the lower end portion of the cylindrical portion 24. Further, the inside of the upper lid portion 21 has an inner cylindrical portion 26 which is tightly fitted to the inner surface 11 of the bottle portion 10 on the inner surface of the top surface 21 a, and a bottle portion 1.
Two ring-shaped protrusions 29 that are in close contact with the bottle top surface 12a
In the vicinity of the lower end of the inner wall of the cylindrical portion 24, a ridge 27 engaging with the upper peripheral groove 13 of the bottle opening 10 is provided intermittently on the circumference. The inner cylinder annular portion 26 is set to be larger than the inner diameter of the bottle inner surface 11 in a natural state, and is tightly fitted to the bottle inner surface 11 in a compressed state by stoppering at the time of mounting. Further, the ring-shaped projection 29 is also elastically deformed in a compressed state at the time of plugging, and the bottle top surface 12a
The dimensions are set so as to be in close contact.

On the other hand, the tamper evidence band section 22
Is provided on its inner wall with a circumferential protruding ring 28 that engages with the lower circumferential groove 15 of the bottle opening 10, and traverses the tamper-evident band portion 22 at one place on the outer periphery to form a side score portion 23. A thin vertical score portion 25 which is easy to tear and is connected to the upper cover portion 21 is provided on the upper end side portion of the vertical score portion 25.
And tamper-evidence band part 22 with side score part 2
A knob 31 for projecting and separating the 3 and the vertical score 25 is projected. One end of the knob portion 31 and one portion of the outer periphery of the lower end of the tubular portion 24 of the upper lid portion 21 are connected by a thin bridge 32 that is easily cut.

FIG. 3 is an enlarged partial cross-sectional view (BB of FIG. 2) of the fitting state of the bottle opening 10 and the synthetic resin cap 20 of the present invention.
(The fitting cross section at the position), and the portion where the cap 20 and the bottle opening 10 are overlapped and shown in the drawing indicates that the cap is elastically deformed by tapping and comes into close contact with the bottle opening. . In FIG. 3, the outer diameter of the tamper-evident band portion 22 is shown to be equal to the outer diameter of the ring portion 17 of the bottle opening portion 10. However, the tamper-evident performance for preventing the cap 20 from being unnecessarily opened is improved. For better function, the larger the diameter of the ring 17 of the bottle opening 10 is, the better the gap formed between the lower end of the cap 20 and the upper end of the ring 17 is better.

FIG. 5 is a partial sectional view of another embodiment of the present invention, in which a claw-like portion 26 'is provided inside the vicinity of the lower end of the annular portion 26 of the inner cylinder of the cap 20. Claw 2
For example, a desiccant S in the form of a sheet can be inserted into a space defined by 6 ′, the inner cylindrical portion 26, and the top inner surface 21b. A plurality of such claw portions 26 'may be provided intermittently on the circumference, or may be provided continuously in an annular shape. As shown in FIG. 6, a tapered annular slope 28a is formed below the protruding ring 28 of the tamper-evident band portion 22, and the inclination angle of the annular slope 28a with respect to the vertical plane is determined by the protruding ring. By making it sufficiently looser than that of the upper projecting wall 28b of 28,
A structure in which the cap 20 is easily fitted into the bottle opening 10 and is difficult to come off can be obtained.

The bottle portion 10 and the synthetic resin cap 2 of the present invention
0 is the cap 2 supplied to the bottle opening 10.
The capping is completed only by pressing the entire top surface 21a of zero. In addition, opening and re-capping are shown in FIG.
As shown in (a) to (c), first, the knob portion 31 is pulled to cut the bridge 32, and then pulled substantially in the circumferential tangential direction to tear the thin vertical score portion 25 and the side score portion 23. Then, the upper lid portion 21 and the tamper-evident band portion 22 are separated, and the tamper-evident band portion 22 is detached from the bottle opening 10. Next, the collar 30 of the upper lid 21 remaining in the bottle opening 10 is pulled up and removed from the bottle opening 10. Then, in the case of recapping, the upper lid 21 can be mounted by placing the upper lid 21 on the bottle opening 10 and pushing in the cap top surface 21a.

(Example 1) A 200 cc milk bottle (lip diameter 36.5 mm) made of glass to which the bottle structure of the present invention is applied and a synthetic resin cap made of LD polyethylene of the present invention are prepared. 0.3 milk was filled at 5 ° C., the cap was stoppered, and leakage was confirmed when the milk was left lying down at 10 ° C. and 23 ° C. for 24 hours. There were no leaks or bleeds in 20 samples at each temperature. Further, once opened, the cap was re-capped at 5 ° C., and the same leak was confirmed. However, no leak or bleeding was found in any of the samples.

(Embodiment 2) The above-mentioned milk bottle was capped with a cap and left at 23 ° C. for 48 hours, and the opening force (the tearing force between the vertical score portion and the side score portion) was measured with a push-pull gauge. . In addition, the thickness of the vertical score portion and the side score portion of the cap was 0.2 mm, and the opening direction was almost 45 degrees tangential direction. The measurement result of 10 pieces is 0.6-0.8kgf
Can be opened with the power of.

Example 3 The sample used in Example 2 was left at 5 ° C. and 23 ° C. for 48 hours, and the opening force of the upper lid was measured. The opening direction was vertical. As a result of ten measurements, 1.2 to 1.5 kgf at 5 ° C and 0.8 to 1.5 kgf at 23 ° C.
It was 0 kgf.

[0019]

The combination structure of the bottle and the synthetic resin cap according to the present invention, which is constructed as described above, is as simple as possible in a container that does not need to maintain an internal pressure or a reduced pressure. And the cost can be reduced. The capping process is simple and no complicated equipment is required. There is no leakage of contents at the distribution stage of the product, and it has tamper-evident performance. It is easy to open with a small force at the consumer stage, and can be recapped (resealed) without leakage. The tamper-evident band is separated from the bottle by opening, and the top cover can be easily removed (the cap as a whole can be easily removed from the bottle). Or it is easily recycled as glass cullet resources without impurities. Many advantages such as were confirmed.

[0020]

As described above, the combination structure of the bottle and the synthetic resin cap of the present invention has remarkable utility in terms of cost, users and consumers, and social environment such as recycling. This is to solve the conventional problems at once. In particular, the tamper-evidence band
Because the diameter is larger than the inner diameter of the cylindrical part of the upper lid,
It has good releasability from the mold when molding
Formed in the tamper-evident band during capping
Circular protruding ring is easy to enter the bottle mouth. And open
After being sealed, when collecting the bottle,
Bottle the entire lid and tamper-evident band cap
Easy to remove from the mouth, collection and reuse of bottles and resources
It also has the advantage of being easy to recycle.

[Brief description of the drawings]

FIG. 1 is a plan view and a side view showing an embodiment of a bottle mouth portion of the present invention.

FIG. 2 is a bottom view and a side view showing an embodiment of the cap of the present invention.

FIG. 3 is an enlarged partial cross-sectional view showing a fitted state of a bottle mouth portion and a synthetic resin cap of the present invention.

FIG. 4 is an explanatory view showing opening of a cap and handling of a recap according to the present invention.

FIG. 5 is a partial sectional view showing another embodiment of the cap of the present invention.

FIG. 6 is a partially enlarged cross-sectional view showing still another embodiment of the cap of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Bottle mouth part 13 Upper peripheral groove 15 Lower peripheral groove 20 Synthetic resin cap 21 Upper lid part 22 Tamper evidence band part 23 Side score part 24 Cylindrical part 25 Vertical score part 26 Inner cylinder annular part 26 'claw part 30 Flange 31 Knob part 32 Bridge

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Seiji Sakuma 1-3-1 Uchisaiwaicho, Chiyoda-ku, Tokyo Inside the Japan Crown Cork Co., Ltd. (72) Kinji Fuchie 1-31-1 Uchisaiwaicho, Chiyoda-ku, Tokyo Inside Japan Crown Cork Co., Ltd. (72) Inventor Yoichi Tsujiguchi 2-12 Nagatoro, Hiratsuka-shi, Kanagawa Japan Co., Ltd. Hiratsuka Plant (56) References Japanese Utility Model 1988-61-14955 (JP, U) 6-32351 (JP, U)

Claims (1)

(57) [Claims] 1. A combined structure of a bottle mouth portion and a synthetic resin cap which is fitted and attached to an upper circumferential groove and a lower circumferential groove provided on an outer peripheral portion thereof, a bottle top surface and a bottle inner surface. The synthetic resin cap is formed of a one-piece cap, and includes an upper lid portion, a tamper-evident band portion, and a thin-walled side score portion connecting the lower end of the upper lid portion and the upper end of the tamper-evident band portion in a circumferential shape. The upper lid portion is a cylindrical portion hanging down from a circular top surface periphery,
A flange protruding from a part of the lower peripheral edge of the cylindrical portion, and an inner cylinder ring which is dripped from the inner surface of the top surface, is larger than the inner diameter of the bottle in a natural state, and is tightly fitted inside the bottle in a compressed state by tapping. Department and
Before SL and a protrusion provided so as to the upper circumferential groove and the engagement of Binguchi portion near the lower end of the inner wall of the cylindrical portion, the tamper evident band portion, said Binguchi portion on its inner wall a circumferential butt ring which engages the lower peripheral groove, the thin thickness of the vertical score portion for longitudinal the tamper evident band portion and, adjacent the upper end side set kicked the knob portion of the vertical score portion Further, the knob portion and the upper lid portion are connected by a thin bridge that can be easily cut , and the inner diameter of the tamper evidence band portion is the same as that of the upper lid portion.
A combination structure of a bottle mouth and a synthetic resin cap, wherein the combination is formed larger than the inner diameter of the cylindrical portion .