JP2000238814A - Container and its cap - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a container and its cap in which can be hermetically-sealed on the container, and can be easily opened. SOLUTION: A container 1 has an engaging protrued stripe 5 at an outer periphery of an upper end 4 of an opening 3, and a cap 2 is made of synthetic resin. The cap 2 has a top wall 6, a skirt 7 press contacted with the inner surface of the opening 3, and an inner ring 8 press contacted with the inner surface of the opening 3. An engaging protruded stripe 10 is provided to engage with the stripe 5 at an inner circumferential lower part 9 of the skirt 7. A part of the outer circumferential lower end 11 of the skirt 7 is formed with a flange 12, and the inner circumference of the skirt corresponding to the flange 12 is formed with a protrued stripeless part 13 where the stripe 10 is lacking.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a container such as a bottle and a cap mounted on the container.

[0002]

2. Description of the Related Art A milk bottle or the like generally used as a conventional container and its cap has a paper cap attached to the bottle mouth as is well known, though not shown, and is used by consumers and the like. Is opened with a small cone provided by a milk maker, but the cone is rarely placed in homes and the like, and the paper cap is firmly attached to a recess formed in the bottle mouth. Opening is a bit cumbersome. For this reason, it is required to make it easier to open. In addition, the above-mentioned paper caps generally have poor sealing properties, and thus it is desired to further enhance the sealing properties.

[0003]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and has an object to provide a more excellent sealing property than the conventional paper cap and to easily open the cap. Is to provide a container and its cap. In addition, although the milk bottle and its cap were mentioned as a problem of the prior art, this is only an example, and good sealing and easy opening are problems common to all containers and their caps. That is the solution.

[0004]

The present invention comprises a container 1 and a cap 2 made of synthetic resin. The container 1 has an engagement ridge 5 formed on the outer periphery of an upper end 4 of a mouth 3 thereof. ,
The cap 2 has a top wall 6, a skirt 7 pressed against the engaging ridge 5, and an inner ring 8 pressed against the inner surface of the mouth 3. A locking ridge 10 for locking to the ridge 5 is provided, and a flange portion 12 is formed on a part of the outer peripheral lower end portion 11. A portion corresponding to the flange portion 12 of the locking ridge 10, A weak fitting portion is provided.

[0005] The weak fitting portion is, for example, a ridge lacking portion 13 in which a part of an annular locking ridge is missing, or a projection in which a part of an annular locking ridge is weakened. It is a weakening section.
The locking ridge 10 is formed continuously in an annular shape, or
It can be formed intermittently, that is, by arranging a plurality of locking ridges at intervals in the circumferential direction.

The skirt 7 has, for example, one or a plurality of longitudinal slits 14 extending upward from the lower end of the skirt 7 on both sides of the flange 12 in the front half 7a of the cap provided with the flange 12. Have been. The vertical slits 14 are connected at their lower parts by the locking ridges 10, or are connected partially or entirely by the thin parts 15.

The flange 12 has a weakened portion in the radial direction. The radially weakened portion is, for example, a slit 18 formed at the center of the flange 12 or a thin portion 18a formed at the center of the flange 12.

The flange 12 has a small ridge 19 formed along the tip of the lower surface. The flange 12 has a rib 20 provided between the upper surface and the skirt 7. The upper end 19 of the rib 20 is provided with a weakening line 17 in the vertical direction.
Is located corresponding to the vicinity of the upper end portion 21.

The skirt 7 has a longitudinal weakening line 17 formed on the inner surface of a portion corresponding to the central portion 16 of the flange portion 12. The skirt 7 is formed as a thin portion 22 thinner than the top wall 6, and the thin portion 22 is formed thinner than the flange portion 12. The skirt 7 has an upper portion 23 having a thinner portion 24 that is thinner than the lower thin portion 22.
It is formed as.

The continuous portion 27 of the top wall 6 and the skirt 7
Has a gentle change in wall thickness. Fine meat part 2
Numeral 4 is formed at a position corresponding to the inner ring 8 formed thicker than the thin portion 24.

The inside of the mouth portion 3 of the container 1 has a step portion 28 for accommodating the inner ring 8 pressed against the inner periphery of the mouth portion 3.

[0012]

Embodiments of the present invention will be described with reference to the accompanying drawings. In the figure, reference numeral 1 denotes a container, as an example, a glass milk bottle is shown. An engagement ridge 5 is formed on the outer periphery of the upper end 4 of the mouth 3. Reference numeral 28 denotes a step formed on the inner periphery of the mouth 3. Although the milk bottle is shown as an example of the container 1 in this way, the present invention is not limited to this, and another container such as a glass bottle or a container such as a synthetic resin bottle may be used.

Reference numeral 2 denotes a cap made of a synthetic resin, for example, polyethylene as an example. Is provided.

An engaging ridge 10 for engaging with the engaging ridge 5 is provided below the inner periphery 9 of the skirt 7. As shown in FIG. 4, the locking ridge 10 is formed by removing the vicinity of the flange 12 of the annular locking ridge 10 and removing both ends 10 a, 1.
0b so that both end portions 10a and 10b enter the inside of the base portion 12a of the flange portion 12, or as shown in FIG.
a, 10b may be located at a position apart from the root 12a of the flange 12, and a plurality of locking ridges 10P may be arranged on the root 12a of the flange 12 at circumferential intervals. .

This locking ridge 10 is formed in a state where a part of a continuous ring is missing. However, as shown in FIG. 9, intermittently, that is, a plurality of locking ridges 10M are formed. May be formed at intervals in the circumferential direction.

Reference numeral 12 denotes a flange provided on a part of the outer peripheral lower end 11 of the skirt 7, and a weak fitting portion is formed on the inner periphery of the skirt 7 corresponding to the flange 12. As shown in FIG. 4, the weak fitting portion is a ridge lacking portion 13 that lacks a part of the annular locking ridge 10.

As shown in FIGS. 9 and 12 of still another embodiment of the present invention, the skirts 7 on both sides of the flange 12 are provided.
Is provided with a vertical slit 14. The lower portion of the vertical slit 14 may be connected by a locking ridge 10 as shown in FIG. As shown in FIG. 10, a part of the vertical slit 14 may be connected by a thin portion 15. Although not shown, the thin portion 15 may be formed over the entire vertical slit 14.

A longitudinal weakening line 17 is formed on the inner surface of a portion corresponding to the central portion 16 of the flange portion 12. Since the weakening line 17 is formed in a groove shape, it can also serve as an air vent for releasing air when the cap is attached. This weakening line 17 cooperates with a radial slit 18 described later, as shown in FIGS.
When this is pushed upward, the skirt 7 becomes substantially U-shaped from this portion, and the locking ridges 10 on both sides of the flange 12 are easily released from the engagement ridges 5.

As can be understood from FIGS. 1 and 4, the flange 12 has a small ridge 19 formed along the front end of the lower surface. It does not slip. And collar 12 is weakening line 1
A plurality of ribs 2 between the upper surface on both sides of the
0 is provided.

The rib 20 imparts rigidity to the flange 12 in the vertical direction and also imparts rigidity to the skirt 7 near the flange 12, so that stress is concentrated near the upper end of the rib 20 when the flange 12 is pushed up. And it is formed so as to be easily bent outward from the vicinity of the part.

The flange 12 has a weakened portion in the radial direction. As this weakened portion, for example, as shown in FIG. 3 and FIG.
8 are formed. The slit 18 makes it easy for the flange 12 and the skirt 7 to bend from the central portion 16 when the flange 12 is pushed up.

In particular, when the weakening line 17 is formed on the skirt 7, since the weakening is made in both the vertical and radial directions, the skirt 7 can be more easily bent from the central portion 16, whereby the locking ridge 10 is formed. Can be easily removed. Note that the weakened portion of the collar portion 12 may correspond to the weakened line 17 of the skirt 7.

As a weakened portion of the flange portion 12, a thin portion 18a is used instead of the slit 18 as shown in FIGS. 7 and 8, or a perforation provided at the center of the flange portion 12 as shown in FIG. That is, the cuts 18c may be provided at intervals in the radial direction. The thin part 1
By forming the perforations 8a or the perforations 18c, the flange portion 12 can be easily bent from the central portion 16 similarly to the slit.

In addition, as another function, the weakened portion is a thin portion 18.
In the case of a, when the cap 12 is pushed up when the cap is illegally opened, the skirt 7 provided with the flange 12 is deformed so as to be pulled outward, and at the same time, the flange 12 is The thin portion 18a is deformed so as to open. As a result, tension is generated, and the thin portion 18a is broken.
For this reason, the thin portion 18a can help prevent unauthorized opening. In addition, the perforation 18c can obtain the same effect as the thin portion 18c.

Next, the upper end portion 26 of the rib 20 is positioned at the upper end portion 21 of the weakening line 17 in the vertical direction of the cap 2.
It is located corresponding to the vicinity. With this configuration, when the flange 12 is pushed up, the weakening line 17
Is concentrated in the vicinity of the upper end portion 21 and can be easily bent from the vicinity thereof, so that the engagement ridge 5 can be easily started to come off from the engagement ridge 5.

The skirt 7 is formed as a thin portion 22 which is thinner than the top wall 6 and thinner than the flange portion 12. Thereby, when the flange 12 is pushed up, the flange 12
And the top wall 6 is harder in the vertical direction because the rigidity is greater than the skirt 7, so that only the skirt 7 bends, so that the engaging ridges 5 and the locking ridges 10 can be easily removed. Can be.

As shown in FIG. 5, the upper part 23 of the skirt 7 is formed into a fine part 24 which is thinner than the thin part 22 at the lower part, when the flange 12 is pushed up. It can be easily formed from the boundary portion 31 between the fine portion 24 and the thin portion 22, so that the engaging ridge 5 can be changed to the locking ridge 10.
Can be easily removed.

The upper end 26 of the rib 20 is located near the upper end 21 of the weakening line 17 of the skirt 7. With this configuration, when the flange portion 12 is pushed up, the skirt 7 can be easily bent from the upper end portion 21 of the weakening line 17 because the weakness of the weakening line 17 and the stress concentration of the rib 20 overlap. . Therefore, it is possible to easily release the locking ridge 10 from the engagement ridge 5.

As seen in FIGS. 1 and 5, the top wall 6
The portion 27 that is continuous with the skirt 7 is formed such that the change in thickness is gentle. The connecting portion between the skirt 7 and the top wall 6 formed in this manner forms the thick top wall 6.
The shape is such that stress is dispersed and not concentrated in spite of being a portion connected to the thin portion 22 or the thin portion 24, thereby preventing so-called whiskering from this portion during tapping. Can be.

The thin portion 24 is formed at a position corresponding to the inner ring 8 formed thicker than the thin portion 24. With this configuration, when the cap 12 is opened by pushing up the flange portion 12, the inner ring 8 has relatively little rigidity and therefore little bending, and the skirt 7 bends easily because the skirt 7 is more flexible. Can be easily removed.

As shown in FIGS. 1 and 5, the inner ring 8 has a ridge 8a which protrudes outward in the radial direction, which also serves to seal the mouth 3 of the container 1. I have. On the inner surface of the top wall 6 and on the inner surface of a continuous portion 27 between the top wall 6 and the skirt 7, minute ridges 6a and 6b are provided. 3 is pressed against the upper surface to help hermetic sealing.

Further, a step portion 28 for accommodating the inner ring 8 is provided inside the mouth portion 3 of the container 1, and the container is not shown in the step portion 28 by being formed in this manner. It can be used as a conventional milk bottle with a paper lid attached in the conventional manner, or the cap of the present invention can be used.

The operation of the cap of the present invention will be described. The cap is plugged into the mouth 3 of the container 1 by a plugging machine (not shown). When the user such as a consumer opens this cap, as shown in FIGS.
A finger 32 is applied to the lower surface of the device and pushed upward.

Then, as shown in the figure, the skirt 7 is bent from this portion by a weakening line 17 formed thinner than the top wall 6 and a slit 18 or a thin portion 18a so that the skirt 7 has a substantially rectangular shape. The vicinity of 17 is separated radially outward from the opening 3 of the container 1.

In this state, the ribs 20 are provided between the flange 12 and the skirt 7 when pushed upward.
Further, since the upper end portion 26 corresponds to the vicinity of the upper end portion 21 of the weakening line 17, it bends from the vicinity, and the flange 1
2 in which the slits 14 are formed in the skirts 7 on both sides together with the effect, the locking ridges 10
And all the locking ridges 10 are gradually removed. Thus, the cap 21 is opened. And the user is container 1
Pour out the contents (not shown).

[0036]

According to the present invention, there is provided an inner ring 8 which is constructed as described above and is in pressure contact with the inner surface of the mouth 3 of the container 1, and the locking ridge 10 of the cap 2 is , The container 1 can be sufficiently sealed. In addition, since a weak fitting portion is formed in a portion corresponding to the flange portion 12 of the annular locking ridge, when the cap 2 is opened, the flange portion 12 is formed.
Can be easily pushed up by pushing it upward, so that the locking ridges 10 on both sides of the container 1 can easily be released from the engaging ridges 5 of the container 1, and the pushing is continued in that state. Thereby, the start of the detachment can be applied to the detachment of the entire circumference, and thus the opening can be easily performed.

The skirt 7 is formed on the front half 7a of the cap provided with the flange portion 12 and has longitudinal slits 14 on both sides of the flange portion 12, so that the lower portion of the skirt 7 is easily expanded when opened. Therefore, it is possible to easily remove the locking ridge 10 from the engaging ridge 5 on the front half circumference 7a.

Since the lower portion of the vertical slit 14 is connected by the locking ridge 10, or a part or the whole thereof is connected by the thin portion 15, the sealing property of the cap 2 and the ease of opening can be improved. Can be compatible. With respect to the above-mentioned hermeticity, for example, when the container 1 is a milk bottle and filled with milk, the container 1 is usually kept at a low temperature of about 5 ° C., and when the temperature rises for some reason, the liquid temperature rises. When the liquid volume increases, the head space (air portion) at the top of the bottle decreases, and the pressure increases, the cap may rise only with the vertical slit 14, but this can be prevented. .

The skirt 7 has a vertical weakening line 17 formed on the inner surface of a portion corresponding to the central portion 16 of the flange portion 12, so that when the cap 2 is opened, the lower surface of the flange portion 12 is raised. The flange portion 12 and the portion of the skirt 7 on which the flange portion 12 is provided are bent in a substantially U-shape, and thus are separated radially outward from the mouth portion 3 of the container 1. It is possible to easily remove the locking ridge 10 from the engaging ridge 5. Therefore, the locking ridge 10 can be easily started to come off as described above, and thus the entire opening can be easily opened.

Since the flange portion 12 is provided with the radial weakening portion, the flange portion 12 can be weakened in the radial direction in addition to the longitudinal weakening, and the flange portion 12 and the skirt 7 when the flange portion 12 is pushed up. Of the locking ridges 10 on both sides of the flange 12 can be surely started to come off from the engaging ridges 5.

If the weakened portion is the thin portion 18a, and if the cap is illegally opened as another effect, when the flange 12 is pushed up, the skirt 7 provided with the flange 12 is moved outward. The flange portion 12 is deformed so as to be pulled, and the flange portion 12 is deformed so that the tip of the thin portion 18a is opened. As a result, tension is generated, and the thin portion 18a is broken. For this reason, the thin portion 18a can also help prevent unauthorized opening.

Since the flange 12 has a small ridge 19 formed along the tip of the lower surface, when the flange 12 is pushed up,
Even if a radial outward force is applied to the pushing finger 32, the small ridge 19 exerts a reaction force against this force, so that all the forces can be directed to the pushing without waste.

Since the ribs 20 are provided between the upper surface and the skirt 7, the rigidity of the flange 12 in the vertical direction can be increased, and the flange 12 can be easily pushed up. As shown in FIG. 13, the bending stress can be concentrated in the vicinity of the upper end portion 26 of the rib 20, so that the deformation of the skirt 7 where the rib 20 is provided can be facilitated. It is possible to easily start the disengagement of the engagement protrusion 10 from the engagement ridge 5.

Since the upper end 19 of the rib 20 is positioned in the vertical direction corresponding to the vicinity of the upper end 21 of the weakening line 17, the rib 18 when the flange 12 is pushed up is formed.
The deformation of the skirt 7 due to the concentration of stress at the upper end 26 thereof corresponds to the vicinity of the upper end 21 of the weakening line 17, so that the above-mentioned deformation can be further facilitated, and the locking ridges 10 on both sides of the flange 12 are formed. Can be more easily started.

The skirt 7 has a thin portion 2 which is thinner than the top wall 6.
2 and the thin portion 22 is formed to be thinner than the flange portion 12, so that the skirt 7 has less rigidity than the two 6 and 12, so that the skirt 7 deforms well when the flange portion 12 is pushed up. Thus, the locking projections 10 on both sides can easily be released.

Since the upper part 23 of the skirt 7 is formed as a thin part 24 which is thinner than the thin part 22 at the lower part, when the flange 12 is pushed up, it is satisfactorily deformed from this part and easily. The detachment of the locking projections 10 on both sides of the flange 12 can be started.

The continuous portion 27 of the top wall 6 and the skirt 7
Since the change in the wall thickness is gently formed, when the cap is plugged into a container, the thick top wall 6 and the thin wall 2
If it is connected directly to the skirt 7 of 2 or 24,
Stress concentration occurs in the continuous part, so-called whiskers, but in the present invention, since the change in thickness at that part is formed gently, stress is dispersed and it is prevented that whiskers during tapping can do.

Since the small wall portion 24 is formed at a position corresponding to the inner ring 8 formed thicker than the small wall portion 24, the inner ring 8 has high rigidity when the cap is removed from the container. Since the skirt 7 is formed to have a lower rigidity, the skirt 7 can be easily deformed when the flange 12 is pushed up, whereby the locking ridges 10 on both sides of the flange 12 come off. Can be easily started.

Since the inside of the mouth portion 3 of the container 1 has a step portion 28 for accommodating the ring 8 pressed against the inner periphery of the mouth portion 3,
When the container is a milk bottle, a paper lid can be attached using the stepped portion 28 as in the related art, and the cap of the present invention can be attached and can be used for both purposes.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention, in which a container and a part of a cap thereof are omitted.

FIG. 2 is a sectional view of a portion of the cap shown in FIG.

FIG. 3 is a plan view of a portion of the cap shown in FIG. 1;

FIG. 4 is a bottom view of a portion of the cap shown in FIG. 1;

FIG. 5 is a view showing another embodiment of the present invention and corresponding to FIG. 1;

6 is a sectional view of a portion of the cap shown in FIG.

FIG. 7 is a plan view of a portion of the cap shown in FIG. 5;

FIG. 8 is a bottom view of a portion of the cap shown in FIG. 5;

FIG. 9 is a perspective view showing still another embodiment of the present invention and showing an inner surface of a cap.

FIG. 10 is a perspective view of a portion of a cap according to still another embodiment of the present invention.

FIG. 11 is a view showing still another embodiment of the present invention and corresponding to FIG. 10;

FIG. 12 is an explanatory view showing a case where the cap shown in FIG. 9 is opened.

FIG. 13 is a cross-sectional view of a part in an open state shown in FIG.

FIG. 14 is a perspective view in the case of the open state shown in FIG.

FIG. 15 is a bottom view of a cap part according to another embodiment, and is a view corresponding to FIG. 4;

FIG. 16 is a plan view of a portion of a cap showing another embodiment, and corresponds to FIG. 7;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Container 2 Cap 3 Mouth part 4 Upper end part 5 Engagement ridge 6 Top wall 7 Skirt 8 Inner ring 9 Inner circumference lower part 10 Locking ridge 11 Outer peripheral lower end part 12 Flange part 13 Missing part of ridge part 14 Vertical slit 15 Thin part 16 Central part 17 Weak line 18 Slit 18a Thin part 19 Small ridge 20 Rib 21 Upper end part 22 Thin part 23 Upper part 24 Fine part 27 Continuous part 28 Step part

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor: Manabu Sakamoto 53, Terado, Oaza, Koryo-cho, Kitakatsuragi-gun, Nara F-term in Mikasa Sangyo Co., Ltd. (reference) 3E084 AA04 AA12 AA32 AB01 BA01 CA01 CC04 DA01 DB01 DB09 DB13 DC04 EA04 EC04 FA09 FC02 FC09 GA08 GB12 GB17 HA03 HB02 HC03 HD01 HD03 KB01 LA17

Claims (19)

[Claims] 1. A container 1 and a cap 2 made of a synthetic resin. The container 1 has an engagement ridge 5 formed on an outer periphery of an upper end 4 of a mouth portion 3 thereof, and the cap 2 has a top wall. 6,
A skirt 7 pressed against the engaging ridge 5 and the mouth 3
An inner ring 8 is pressed against the inner surface of the skirt 7, and a locking ridge 10 is provided below the inner circumference 9 of the skirt 7 to lock the engagement ridge 5. A container and a cap, wherein a weak fitting portion is provided in a portion corresponding to the flange portion of the locking ridge. 2. The container according to claim 1, wherein the weak fitting portion is a ridge lacking portion 13 in which a part of an annular locking ridge is missing. 3. The weak fitting portion is a ridge weakening portion obtained by weakening a part of an annular locking ridge.
The described container and its cap. 4. The container according to claim 1, wherein the locking ridge 10 comprises a plurality of locking ridges arranged at intervals in the circumferential direction. 5. The skirt 7 has one or a plurality of vertical slits 14 extending upward from the lower end of the skirt 7 on both sides of the flange 12 in the front half 7a of the cap provided with the flange 12. The container according to claim 1, wherein the cap is provided. 6. The container according to claim 5, wherein the lower portion of the vertical slit is connected by a locking ridge. 7. The container and the cap according to claim 5, wherein a part or all of the vertical slit is connected by a thin portion. 8. The container according to claim 1, wherein a radially weakened portion is formed in said flange portion. 9. The container according to claim 8, wherein the weakened portion in the radial direction is a slit formed in a central portion of the flange. 10. The thinned portion 18a formed at the center of the flange portion, wherein the weakened portion in the radial direction is provided.
The described container and its cap. 11. A small ridge 19 is formed on the flange 12 along the tip of the lower surface.
The container according to 2, 3, 4, 5, 6, 7, 8, 9, or 10, and the cap thereof. 12. The collar portion 12, wherein ribs 20 are provided between the upper surface and the skirt 7, respectively. Or 11
The described container and its cap. 13. The skirt 7 has a longitudinal weakening line 17 formed on the inner surface of a portion corresponding to the central portion 16 of the collar portion 12. ,
The container according to 6, 7, 8, 9, 10, 11, or 12, and the cap thereof. 14. The container and its cap according to claim 13, wherein the upper end 19 of the rib 20 is positioned corresponding to the vicinity of the upper end 21 of the weakening line 17 in the vertical direction. 15. The skirt 7 is formed as a thin portion 22 thinner than the top wall 6, and the thin portion 22 is formed thinner than the flange portion 12.
2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12,
13. The container according to 13 or 14, and a cap thereof. 16. The container and cap according to claim 15, wherein the upper portion of the skirt is formed as a fine portion which is thinner than the thin portion at the lower portion. 17. A continuous portion 27 of the top wall 6 and the skirt 7.
17. The container according to claim 15 or 16, wherein the thickness of the container is gradually changed. 18. The container according to claim 16, wherein the fine portion 24 is formed at a position corresponding to the inner ring 8 formed thicker than the fine portion 24. And its cap. 19. The inside of the mouth 3 of the container 1 has a step 28 for accommodating the inner ring 8 pressed against the inner periphery of the mouth 3. , 7, 8, 9, 10, 11,
The container according to 12, 13, 14, 15, 16, 17, or 18, and the cap thereof.