JP2005088938A - Cap, and combination structure of the cap and bottle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cap and a bottle capable of surely preventing the cap from loosening, and capable of surely fixing a tamper-evident skirt to the bottle. <P>SOLUTION: The cap consists of a top face wall 12a and a skirt wall 12b hanging from its periphery. A weakened line 12g extending circumferentially is formed on the skirt wall to partition into a main part 12h above the line and the tamper-evident skirt 12i below the line. The main part has an inner tube 12d having, on its inner peripheral surface, an internal thread 12c to engage with an external thread forming part 11g formed on the outer periphery of a bottle mouth 11a extending downwardly from the internal surface of the top face wall, and a seal 12m coming into tight contact with a seal edge 11f. A plurality of reinforcing parts 12e are formed circumferentially at intervals between the inner tube and the skirt wall. The lower part of the reinforcing part has an anti-slacking rib 12f to interfere with a rib receive 11h on the upper surface of a step 11j when the cap is rotated. The inner peripheral surface of the tamper-evident skirt has a flexible flap 12j locking with a jaw 11e and protruding inwardly and upwardly in the radial direction. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a cap and a combined structure of the cap and the bottle, and more particularly to a cap and a combined structure of the cap and the bottle with improved adhesion to the bottle mouth when the cap is mounted.

Synthetic resin caps used for soft drink bottles, etc., have the disadvantage that they rotate due to heat, vibration, etc., and the joints to the caps attached to the bottle mouths are easy to loosen. A device provided with a means for preventing the loosening of the threaded portion, a means for fixing the tamper evidence skirt, and the like has been proposed.
Patent Document 1 discloses a cap provided with a loosening prevention means in which a plurality of flexible engagement pieces are vertically suspended at a lower surface of a ring-shaped step portion formed on a top wall of a synthetic resin cap. Yes.
Patent Document 2 proposes a flexible engagement piece that is provided on the inner surface of the cap top wall to be engaged with the top surface of the bottle mouth.
In Patent Document 3, as a means for fixing a tamper-evident cap in a bottle container, a radius thereof is provided on an inner peripheral surface of a tamper-evident hem portion defined by a circumferential weakening line below a cylindrical skirt wall of the cap. A synthetic resin cap provided with a lock claw that protrudes obliquely upward at a predetermined angle toward the inside in the direction has been proposed and put into practical use.
Japanese Patent Laid-Open No. 8-156951 Japanese Utility Model Publication No. 1-116157 JP-A-8-34458

However, it is difficult to maintain structurally sufficient strength with the cap provided with the engagement protrusion that engages with the thread portion at the upper end of the bottle mouth portion described in Patent Document 1 and Patent Document 2 described above. For this reason, there is a problem in that the engagement portion or the like is likely to be distorted or damaged by tightening the cap, and durability and reliability at the time of sealing are lacking. Further, since the durability and rigidity of the cap itself are low, there is a problem that it is easily affected by temperature change and dimensional variation of the cap or bottle.
In the synthetic resin cap provided with the lock claw at the tamper evidence hem portion described in Patent Document 3, the lock is formed when the lower part of the annular jaw portion formed in the bottle mouth portion becomes loose due to its design or the like. There is a problem that the nail is easily detached from the annular jaw portion, and the tamper evidence hem portion cannot be securely locked to the cap mouth portion, and the reliability of the tamper evidence is lacking.
The present invention has been made to solve the above-mentioned conventional problems, and prevents the cap attached to the bottle mouth from being loosened without increasing the durability and rigidity of the cap itself and impairing its opening and sealing performance. Another object of the present invention is to provide a cap and a cap-bottle combination structure that can secure the tamper evidence hem to the bottle.

The cap according to claim 1 of the present invention is a cap comprising a top wall and a cylindrical skirt wall depending from the peripheral edge of the top wall, and the circumferential direction extending in the circumferential direction on the skirt wall of the cap A weakening line is formed, and the skirt wall is divided into a main part above the circumferential weakening line and a tamper evidence hem below the circumferential weakening line,
The main portion is in close contact with the inner cylinder having an internal thread portion on the inner peripheral surface that engages with the external thread forming portion formed on the outer periphery of the bottle mouth portion extending downward from the inner surface of the top wall, and the seal edge of the bottle mouth portion And a sealing portion
A plurality of reinforcing portions are formed between the inner cylinder and the skirt wall at intervals in the circumferential direction, and a lower portion of the reinforcing portion is a rib receiving portion on the upper surface of the bottle mouth portion step portion when the cap rotates. The tamper-evidence hem has an inner peripheral surface having a flexible flap that protrudes inward and upward in the radial direction to be engaged with the jaw portion of the bottle mouth. It is characterized by that.

The cap according to claim 2 is a cap comprising a top wall and a cylindrical skirt wall depending from the peripheral edge of the top wall, and a circumferential weakening line extending in the circumferential direction is formed on the skirt wall of the cap. Formed, the skirt wall is partitioned into a main portion above the circumferential weakening line and a tamper evidence hem below the circumferential weakening line,
The main portion is in close contact with the inner cylinder having an internal thread portion on the inner peripheral surface that engages with the external thread forming portion formed on the outer periphery of the bottle mouth portion extending downward from the inner surface of the top wall, and the seal edge of the bottle mouth portion A plurality of reinforcing portions are formed between the inner cylinder and the skirt wall at intervals in the circumferential direction.
The inner peripheral surface of the tamper evidence skirt has a flexible flap protruding radially inward and upward of the bottle mouth,
The flap is characterized in that it interferes with a flap locking projection formed outside the cylindrical body of the bottle mouth part below the jaw part of the bottle mouth part when the cap rotates.

The cap-bottle combination structure according to claim 3 of the present invention is a combination structure of a bottle and a cap attached to the bottle, and the cap is a cylinder that hangs down from the top wall and the periphery of the top wall. A circumferential weakening line extending in the circumferential direction is formed on the skirt wall of the cap, and the skirt wall has a main portion above the circumferential weakening line and the circumferential portion. It is divided into the tamper evidence hem below the direction weakening line,
The main portion is in close contact with the inner cylinder having an internal thread portion on the inner peripheral surface that engages with the external thread forming portion formed on the outer periphery of the bottle mouth portion extending downward from the inner surface of the top wall, and the seal edge of the bottle mouth portion And a plurality of reinforcing portions are formed between the inner cylinder and the skirt wall at intervals in the circumferential direction, and the lower portion of the reinforcing portion is a bottle opening when the cap is rotated. While having a loosening prevention rib that interferes with the rib receiving portion on the upper surface of the stepped portion,
The inner peripheral surface of the tamper evidence skirt has a flexible flap protruding radially inward and upward of the bottle mouth,
The flap interferes with a flap locking projection formed outside the cylindrical body of the bottle mouth portion below the jaw portion when the cap rotates.

  According to the cap of the present invention, a circumferential weakening line extending in the circumferential direction is formed on the skirt wall of the cap, and the skirt wall has a main portion above the circumferential weakening line. A female threaded part that engages with a male threaded part formed on the outer periphery of the bottle mouth that extends downward from the inner surface of the top surface wall. And a plurality of reinforcing portions spaced in the circumferential direction between the inner cylinder and the skirt wall. The lower portion of the reinforcing portion has a loosening prevention rib that interferes with the rib receiving portion on the top surface of the bottle mouth portion when the cap is rotated, and the bottle mouth portion on the inner peripheral surface of the tamper evidence hem portion. Toward the upper and lower radial direction Because it has a flexible flap that protrudes, it enhances the durability and rigidity of the cap itself, so that it has excellent openability and sealing performance, and has a cap that is excellent in preventing loosening of the cap attached to the bottle mouth. Can be provided.

  According to the cap of claim 2 of the present invention, a circumferential weakening line extending in the circumferential direction is formed on the skirt wall of the cap, and the skirt wall has a main portion above the circumferential weakening line. A female threaded part that engages with a male threaded part formed on the outer periphery of the bottle mouth that extends downward from the inner surface of the top surface wall. And a plurality of reinforcing portions spaced in the circumferential direction between the inner cylinder and the skirt wall. And a flexible flap that protrudes radially inward and upward of the bottle mouth portion on the inner peripheral surface of the tamper evidence hem. A cylindrical shape of the bottle mouth part below the mouth jaw part Since it interferes with the flap locking protrusion formed on the outside, the tamper-evident hem can be securely fixed to the bottle without relying on the locking of the rib receiving portion and the loosening prevention rib. It is possible to make the cap excellent in reliability against the dent property.

  According to the cap and bottle combination structure according to claim 3 of the present invention, the main portion has an internal thread portion that engages with an external thread formation portion formed on the outer periphery of the bottle mouth portion extending downward from the inner surface of the top wall. It has an inner cylinder on the peripheral surface and a seal portion that is in close contact with the seal edge of the bottle mouth, and a plurality of reinforcing portions are formed at intervals in the circumferential direction between the inner cylinder and the skirt wall. The lower portion of the reinforcing portion has a loosening prevention rib that interferes with the rib receiving portion on the top surface of the bottle mouth portion when the cap is rotated, and the inner peripheral surface of the tamper evidence hem portion has a radius of the bottle mouth portion. It has a flexible flap that protrudes inward and upward in the direction, and the flap interferes with the flap locking protrusion formed outside the cylindrical body of the bottle mouth part below the jaw part when the cap rotates As a result, the cap attached to the bottle mouth is excellent in preventing looseness. The combination structure of the cap and bottle can be provided.

FIG. 1 is an exploded cross-sectional view of a combined cap and bottle structure according to the present invention, FIG. 2 is a cross-sectional view of a combined cap and bottle structure in which a cap is attached to a bottle mouth, and FIG. It is sectional drawing explaining the state from which the main part of the cap was cut | disconnected from the tamper evidence skirt part by the weakening line. FIG. 4 is a schematic bottom view of a cap according to the present invention.
1 to 4, reference numeral 10 denotes a combination structure of a cap and a bottle, and a cap 12 is screwed and attached to a bottle mouth portion 11 a of the bottle 11.

First, the bottle will be described with reference to the drawings. The bottle mouth portion 11a formed at the upper end of the bottle 11 has a neck portion 11c extending from the upper end of the bottle main body 11b filling the contents, and the flange portion 11d is located above the neck portion 11c. It is formed so as to protrude circumferentially outward in the radial direction.
In addition, the bottle mouth portion 11a is further reduced in diameter at the center in the height direction of the bottle mouth portion 11a above the flange portion 11d to form a step portion 11j radially inward. The jaw 11e extends slightly in the radial direction from the outer end and extends in a ring shape around the step 11j, and a male screw is formed on the outer periphery from the inner end of the step 11j. A male screw forming portion 11g is extended.

The upper end of the male screw forming portion 11g at the tip of the bottle mouth portion 11a is a seal edge portion 11f that is in close contact with the inside of the top surface wall 12a of the cap.
Further, a rib receiving portion 11h, a part of which is formed in a protruding shape or a concave shape, is provided on the upper portion of the step portion 11j, and the loosening prevention rib 12f of the cap 12 is locked to rotate the cap. To prevent.
Further, a flap locking projection 11i is provided on the outer surface of the cylinder below the jaw portion 11e and above the flange portion 11d, and the tip of the flap 12j of the cap 12 is locked here.

The bottle mouth portion 11a is formed with a male screw forming portion 11g that is screwed into a female screw portion 12c provided on the inner cylinder 12d of the cap 12 on the outer peripheral surface above the jaw portion 11e, and has a small diameter and a large diameter as a whole. It has a cylindrical shape in which the cylinders are connected at the step portion 11j.
The jaw portion 11e has an annular body formed by protruding the step portion 11j of the bottle mouth portion outwardly in the radial direction. When the cap is opened, the flap 12j of the cap 12 is connected to the flange portion 11d and the jaw portion. 11e, the flap 12j is locked to the lower surface of the jaw portion 11e to prevent the tamper evidence skirt 12i from moving upward.
The overhang amount of the jaw portion 11e is 0.5 to 2 mm, preferably 0.8 to 1 mm. By setting the protruding amount of the jaw portion 11e within the above range, the tip of the flap 12j of the cap 12 can be effectively locked to the lower portion of the jaw portion 11e of the bottle mouth portion 11a.

  The material of the bottle 11 including the bottle mouth portion 11a and the bottle main body 11b may be any of synthetic resin, glass, or the like, but a synthetic resin that allows easy bottle processing is suitable. As the synthetic resin, for example, synthetic resins such as polyethylene and polyethylene terephthalate are preferably used.

Next, the cap will be described.
The cap 12 of the present invention comprises a top wall 12a and a cylindrical skirt wall 12b depending from the periphery of the top wall, and a circumferential weakening line 12g extending in the circumferential direction is formed on the skirt wall 12b of the cap. The skirt wall 12b is divided into a main portion 12h above the circumferential weakening line 12g and a tamper evidence skirt 12i below the circumferential weakening line 12g. The main portion 12h has a top wall 12a. An inner cylinder 12d having an internal thread portion 12c that engages with an external thread forming portion 11g formed on the outer periphery of the bottle mouth portion 11a extending downward from the inner surface, and a seal portion that is in close contact with the seal edge portion 11f of the bottle mouth portion 11a 12k, 12l, and 12m, and a plurality of reinforcing portions 12e are formed between the inner cylinder 12d and the main portion 12h at intervals in the circumferential direction, and a lower portion of the reinforcing portion 12e. , Together with the rib receiving part 11h that interfere with loosening prevention rib 12f of the bottle mouth stepped portion 11j top when the cap rotating,
On the inner peripheral surface of the tamper evident skirt portion 12i, there is a flexible flap 12j that protrudes inward and upward in the radial direction to be engaged with the jaw portion 11e of the bottle mouth portion.

That is, the cap 12 that is screwed with the male thread forming portion 11g of the bottle mouth portion 11a has a top surface wall 12a formed in a disk shape at the top, and the cylindrical skirt wall 12b (outer cylinder) is suspended from the periphery of the top surface wall 12a. In addition, the inner cylinder 12d hangs parallel to the inner side of the cylindrical skirt wall 12b (outer cylinder) on the inner side in the peripheral radial direction of the top surface wall 12a to form a double cylinder. A female screw portion 12c is provided on the inner peripheral surface of the inner cylinder 12d, and is screwed into the male screw forming portion 11g at the top of the bottle 11 when the bottle is closed.
Further, in the main portion 12h of the cap 12, in a space portion between the inner cylinder 12d and the cylindrical skirt wall 12b (outer cylinder), reinforcing portions (ribs) 12e that connect both the cylinders have a predetermined interval in the circumferential direction. A plurality of them are arranged.
At the lower end of the reinforcing portion 12e, a rib receiving portion that extends slightly downward in the center in the radial direction and is partially formed in a convex shape or a concave shape on the upper portion of the step portion 11j of the bottle mouth portion after the cap is attached. Thin-wall loosening prevention ribs 12f that interfere with the portion 11h are formed (eight are provided in FIG. 4).

By arranging such a reinforcing portion 12e between the inner cylinder and the outer cylinder of the cap 12, the rigidity and durability of the entire cap can be added, and a loosening prevention rib 12f is vertically provided at the lower end of the bottle. The cap 12 can be prevented from loosening by interfering with the rib receiving portion 11h of the mouth portion 11a.
In this cap, the inner cylinder 12d having the female thread portion 12c and the main portion 12d of the skirt wall 12b have a double structure, and the diameter of the main portion 12h to which the opening force is applied is increased. ing.
Therefore, the cap 12 attached (or resealed) to the bottle mouth portion 11a is easily rotated by vibration or the like, but the loosening prevention rib 12f is convex or concave on the upper portion of the jaw portion 11e of the bottle 11. It interferes with the provided rib receiving portion 11h so that the cap can be reliably prevented from loosening.
Since a plurality of reinforcing portions 12e are arranged on the inner circumference of the cap 12 at intervals, the overall weight can be reduced and the cap can be manufactured with a small amount of raw material at low cost.

Next, the tamper evidence skirt will be described. A circumferential weakening line 12g that divides the cylindrical skirt wall 12b into an upper main portion 12h and a lower tamper evidence skirt 12i includes a plurality of slits extending in the circumferential direction at intervals in the circumferential direction, And a plurality of bridge portions located in
When opening the cap, if the cap is rotated counterclockwise when viewed from above the top wall, the weakening line 12g is forcibly cut to remove the cap from the bottle mouth, and the tamper evidence hem Since the flexible flap 12j is locked to the lower part of the chin part 11e of the bottle 11 on the inner peripheral surface of the lower end of 12i, the tamper evidence skirt part 12i is left in the bottle mouth part, The cap can be detached from the bottle mouth portion 11a.

A flexible flap 12j that protrudes radially inward and upward is formed on the inner peripheral surface of the tamper evidence skirt 12i. The protrusion length of the flap 12j is 2 to 8 mm, preferably 3 to 3 mm. The thickness is 4 mm and the thickness is 0.2 to 1.5 mm, preferably 0.3 to 0.6 mm.
The flap 12j forms a plurality of flap pieces at intervals in the circumferential direction, but can also be formed as an annular locking piece that extends continuously in the circumferential direction if desired. Moreover, it is preferable that each base edge (joint part with the tamper evidence bottom part of a cap) of the flap 12j is formed horizontally in the substantially circumferential direction.

The shape of the flap 12j is preferably molded into a shape protruding radially inward and downward at the time of molding. This is because it is not necessary to use a so-called split mold that is complicated and expensive as the mold, and so-called unreasonable removal at the time of taking out from the mold can be performed relatively easily.
Then, the final shape of the cap can be obtained by deforming the flap 12j facing inward and downward after molding inward and upward with an appropriate tool.

Since the loosening prevention rib 12f of the cap 12 is suspended from the lower surface of the reinforcing portion 12e, when the cap is loosened, it engages with a rib receiving portion 11h formed in a convex or concave shape on the upper portion of the step portion 11j. Since the cap can be prevented from loosening, the sealing performance in the bottle is not impaired.
In addition, the loosening prevention rib 12f provides a certain resistance for releasing the engagement of the rib receiving portion 11h formed in a convex shape or a concave shape on the upper portion of the step portion 11j. The impact is small.
Further, the cap top wall 12a is provided with seal portions 12k, 12l, and 12m that are in close contact with the seal edge portion 11f of the bottle 11 on the inner top portion thereof, so that a good sealing property at the time of closing and resealing can be obtained. Can do.
A ring-shaped or disk-shaped packing made of a soft synthetic resin or the like is fitted and disposed on the seal portions 12k, 12l, and 12m, or a soft synthetic material is used instead of the seal portions 12k, 12l, and 12m. It is possible to ensure the prevention of liquid leakage by compressing and molding the resin in the cap.

Next, the usage method in the combined structure 10 of a cap and a bottle comprised as mentioned above is demonstrated.
When performing the opening operation of the cap 12, first, as shown in FIG. 2, the cap 12 is rotated in the opening direction, that is, counterclockwise when viewed from above (above the top wall).
When the cap 12 is thus rotated, the loosening prevention rib 12f suspended from the lower surface of the reinforcing portion 12e is disengaged from the rib receiving portion 11h at the upper portion of the jaw portion 11e, and the inner cylinder of the cap 12 is removed. The female screw portion 12c formed on the cap 12 moves along the male screw forming portion 11g formed on the outer peripheral surface of the bottle mouth portion 11a, and the cap 12 rises with rotation.

On the other hand, the flap 12j formed on the inner peripheral surface of the tamper evidence skirt 12i in the cylindrical skirt wall 12b of the cap 12 is locked to the jaw 11e of the bottle 11 when opened as shown in FIG. Accordingly, the upward movement of the tamper evidence skirt 12i is prevented, and considerable stress is generated in the bridging portion in the weakening line 12g formed in the cylindrical skirt wall 12b of the cap 12, and all the bridging portions are generated. As shown in FIG. 3, the main portion 12h of the cap is cut off from the tamper evidence skirt portion 12i and opened.
Further, when the flap locking projection 11i is provided outside the cylindrical body of the bottle mouth portion 11a below the jaw portion 11e, the tamper shrimp is locked by the locking of the flap locking projection 11i and the flap 12j of the cap 12. The rotation of the dent skirt 12i is prevented early.
That is, the locking of the flap locking projection 11i and the flap 12j can prevent the cap from loosening without depending on the locking of the rib receiving portion 11h and the loosening prevention rib 12f, and the bottle at the tamper evidence hem. The cap can be securely fixed to the cap, and it can be a reliable cap for tamper evidence.

Next, the procedure for resealing (resealing) the cap 12 once opened will be described.
When the cap 12 is attached (resealed) to the bottle mouth portion 11a with the bottle contents remaining in the container, the cap 12 is fitted on the bottle mouth portion 11a and the cap 12 is rotated in the closing direction. Then, the female screw portion 12c formed on the inner peripheral surface of the inner cylinder of the cap 12 is screwed into the male screw forming portion 11g formed on the outer peripheral surface of the bottle mouth portion 11a to close the cap.
Once the cap 12 is closed, the loosening prevention rib 12f of the cap 12 is locked to the rib receiving portion 11h formed on the upper portion of the step portion 11j, so that the cap can be rotated with a little opening force such as vibration. The effect of preventing loosening is produced.

Since the combined structure 10 of the cap 12 and the bottle 11 is configured as described above, the reinforcing portion 12e enhances the durability and rigidity of the cap itself, thereby improving its closing performance and sealing performance. Since it is provided with a loosening prevention rib 12f that prevents the cap 12 from rotating, a bottle excellent in the loosening prevention property of the cap 12 to be mounted can be provided.
Further, the cap of the reseal bottle once opened is also loosened because the loosening prevention rib 12f of the cap 12 is locked to the rib receiving portion 11h formed on the upper portion of the step portion 11j. Due to the loosening prevention effect that does not rotate the cap with the opening force, it is possible to increase the reliability of the cap against leakage of the contents of the reseal bottle.

The cap and the combined structure of the cap and the bottle of the present invention can be suitably applied to beverage containers and the like. This enhances the durability and rigidity of the cap itself and ensures that the cap attached to the bottle mouth is prevented from loosening without compromising its openability, resealability, and sealing performance. Can be prevented.
The contents filled in the bottle of the present invention include various liquids such as soft drinks such as tea and juice, alcohol, etc., but are not particularly limited, chemicals other than for beverages, petroleum products, etc. It can also be applied to other liquid holding containers.

It is an exploded sectional view of the combination structure of a cap and a bottle. It is sectional drawing of the bottle with which the cap was mounted | worn. It is sectional drawing explaining the cap cut away from the tamper evidence skirt part. It is a bottom schematic diagram of the cap concerning the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Cap and bottle combination structure 11 Bottle 11a Bottle mouth part 11b Bottle main body 11c Neck part 11d Flange part 11e Chin part 11f Seal edge part 11g Male thread formation part 11h Rib receiving part 11i Flap latching protrusion part 11j Step part 12 Cap 12a Top wall 12b Skirt wall 12c Female thread part 12d Inner tube 12e Reinforcement part 12f Loosening prevention rib 12g Weakening line 12h Main part 12i Tamper evidence hem part 12j Flap 12k Inner ring (seal part)
12m, 12l seal part

Claims (3)

A cap comprising a top wall and a cylindrical skirt wall depending from the periphery of the top wall,
A circumferential weakening line extending in the circumferential direction is formed on the skirt wall of the cap,
The skirt wall is partitioned into a main part above the circumferential weakening line and a tamper evidence hem below the circumferential weakening line,
The main part has an inner cylinder having an internal thread surface on the inner peripheral surface that engages with an external thread forming part formed on the outer periphery of the bottle mouth part extending downward from the inner surface of the top wall.
It has a seal part that is in close contact with the seal edge of the bottle mouth part,
A plurality of reinforcing portions are formed between the inner cylinder and the skirt wall at intervals in the circumferential direction, and a lower portion of the reinforcing portion is a rib receiving portion on the upper surface of the bottle mouth portion step portion when the cap rotates. And has a loosening prevention rib that interferes with
The cap characterized in that the inner peripheral surface of the tamper evidence skirt has a flexible flap protruding inward and upward in the radial direction to be engaged with the jaw of the bottle mouth. A cap comprising a top wall and a cylindrical skirt wall depending from the periphery of the top wall,
A circumferential weakening line extending in the circumferential direction is formed on the skirt wall of the cap,
The skirt wall is partitioned into a main part above the circumferential weakening line and a tamper evidence hem below the circumferential weakening line,
The main portion is in close contact with the inner cylinder having an internal thread portion on the inner peripheral surface that engages with the external thread forming portion formed on the outer periphery of the bottle mouth portion extending downward from the inner surface of the top wall, and the seal edge of the bottle mouth portion A plurality of reinforcing portions are formed between the inner cylinder and the skirt wall at intervals in the circumferential direction.
The inner peripheral surface of the tamper evidence skirt has a flexible flap protruding radially inward and upward of the bottle mouth,
The cap is characterized in that the flap interferes with a flap locking projection formed outside the cylindrical body of the bottle mouth portion below the jaw portion of the bottle mouth portion when the cap rotates. A combination structure of a bottle and a cap attached to the bottle,
The cap comprises a top wall and a cylindrical skirt wall depending from the periphery of the top wall,
A circumferential weakening line extending in the circumferential direction is formed on the skirt wall of the cap,
The skirt wall is partitioned into a main part above the circumferential weakening line and a tamper evidence hem below the circumferential weakening line,
The main portion is in close contact with the inner cylinder having an internal thread portion on the inner peripheral surface that engages with the external thread forming portion formed on the outer periphery of the bottle mouth portion extending downward from the inner surface of the top wall, and the seal edge of the bottle mouth portion And a plurality of reinforcing portions are formed between the inner cylinder and the skirt wall at intervals in the circumferential direction, and the lower portion of the reinforcing portion is a bottle opening when the cap is rotated. While having a loosening prevention rib that interferes with the rib receiving portion on the upper surface of the stepped portion,
The inner peripheral surface of the tamper evidence skirt has a flexible flap protruding radially inward and upward of the bottle mouth,
The combined structure of a cap and a bottle, wherein the flap interferes with a flap locking protrusion formed outside the cylindrical body of the bottle mouth portion below the jaw portion when the cap rotates.

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