JP4628111B2 - Cap for liquid container - Google Patents

Description

The present invention relates to a cap for a liquid container that can be opened and closed with the stopper being securely fitted to the container mouth. More specifically, the stopper is set on the cap body. There is no detachment of the stopper during extraction at the stage, and during use, when removing the cap body from the container mouth, the stopper during extraction does not come off from the container mouth at the same time. The present invention relates to a cap for a liquid container in which an engagement state of a stopper and a container body is extremely excellent in sealing performance.

Caps for liquid containers are used for containers for containing seasonings, edible oils, beverages, and the like, and many of them are mainly made of plastic in terms of production and material costs. And this plastic liquid container cap is tightly screwed into the container mouth to make it liquid-tight, and is further provided with a stopper during pouring and fitted into the container mouth to The cut is good. Further, it is also known that this liquid container cap has a tamper evidence mechanism, and that fact remains once opened, so that various mischiefs can be prevented.

The following Patent Document 1 discloses a cap with a cap, and this cap with a cap is
As shown in FIG. 5, the cap body I includes a cap body I detachably attached to the mouth / neck portion of the container III, and a cap II built in the cap body. By sealing the end of the sealing cylinder wall b suspended from i with the flange portion e of the plug, the sealing performance of the cap body and the plug during use is ensured.
In the state before use, the container mouth is sealed with a composite sheet a laminated with an aluminum foil and a resin film to ensure sealing performance. After opening the cap, the cap II installed inside the cap body is removed. This is reversed so that it has a function as a plug II.

No. 7-25329

The cap with cap of Patent Document 1 maintains the initial sealing performance with the composite sheet a. However, the cap is removed after screwing the cap body in use, and the cap after the composite sheet a is further removed. In addition to being troublesome in many operations up to use, there is a problem in terms of hygiene because the inner plug is held by hand. In addition, the temporary sealability after use is ensured by simply abutting the tip of the sealing cylinder wall with the flange portion of the cap. Even if the cap body is loosened even a little, the temporary seal immediately becomes temporary. It has a structure that impairs the sealing performance.

Therefore, the object of the present invention is that both the initial sealing property and the temporary sealing property during use are good, the operability until use is simplified, and the dispensing is performed at the stage of setting the stopper plug into the cap body. Without removing the inner stopper and leaving the outlet stopper at the container mouth, without relying only on the material deformation of the outlet stopper, only the cap body can be screwed and screwed freely from the container mouth. An object of the present invention is to provide a cap for a liquid container which can be used and the cap and the stopper during dispensing do not co-rotate.

The present invention has been proposed in order to achieve the above object, and is characterized by having the following configuration.
That is, according to the present invention,
A cap body having a top and a skirt formed with a thread that hangs from the peripheral edge of the top and is threaded into the container mouth portion on the inner peripheral surface; a cylindrical body that is in close contact with the inner peripheral surface of the container mouth portion; A cap for a liquid container having an outer flange portion extending outward from an outer peripheral surface, and an outlet stopper formed in a trumpet shape in which an upper end of the cylindrical body is expanded outwardly;
An annular seal portion that protrudes inward and seals the container mouth portion is formed on the inner surface of the corner portion of the top portion of the cap body and the skirt,
The annular seal part is formed with an annular outer ring that seals the outer tip of the container mouth part,
From the annular seal portion, a locking projection is formed that comes into contact with the upper surface of the outer flange portion when fitted to the container mouth portion radially inwardly.
An inner ring is formed inward from the locking projection on the top inner surface,
The inner ring is composed of two rings, the outer inner ring is in contact with the inner peripheral surface of the trumpet-shaped tip end portion of the dispensing plug, and the inner inner ring extends inward from the inner peripheral surface of the cylindrical body. A cap for a liquid container is provided, which abuts the upper surface of the inner flange portion and cooperates to seal the stopper during dispensing.

According to the present invention, the outer flange portion of the spouting plug is formed with an annular or a plurality of protrusions extending outward from the outer peripheral surface of the flange, and the annular seal portion of the cap body. The liquid container cap is provided with an annular or a plurality of projections extending inwardly from the inner peripheral surface of the annular seal portion and supporting the annular or the plurality of protrusions of the dispensing plug from below. Is done.

The cap for liquid containers according to the present invention has a cap body fitted to the container mouth and a stopper during pouring while maintaining high sealing performance, and the stopper during filling is securely fitted to the container mouth when the cap is opened. However, the engagement state of the cap and the discharging plug is gentle, and the cap can be easily opened and closed without the cap and the discharging plug rotating together.
Such an effect is brought about by securing the fitting state of the container mouth portion and the discharging stopper with the horizontal seal structure and ensuring the fitting state of the cap body and the discharging stopper with the vertical seal structure. This is an effect unique to the present invention.
At this time, the seal structure in the vertical direction of the cap main body and the spouting plug is composed of an inner ring provided inward from the engaging protrusion on the inner surface of the top of the cap, and the inner peripheral surface of the trumpet-shaped tip of the spouting plug. It is performed in contact with the upper surface of the inner flange portion that extends inward from the inner peripheral surface of the cylindrical body, and by using this seal structure in combination, the sealing performance before opening the cap can be further enhanced. .

Further, the cap for a liquid container of the present invention is performed in a state in which the stoppering cap and the cap body are combined in advance when capping the stoppering cap and the cap body to the container mouth, An annular or a plurality of protrusions extending outward from the outer peripheral surface of the outer flange portion of the outlet plug is formed, and an annular or a plurality of protrusions supporting the protrusion of the outlet plug is supported on the annular seal portion of the cap body. By forming the protrusion, the cap main body and the stopper during extraction can be subjected to a capping operation to the container mouth portion in an engaged state without loosening. Note that the engagement between the cap and the outlet plug is dissociated after capping, and the engagement state between the cap body and the outlet stopper does not hinder the cap opening operation.
In other words, the present invention contributes to maintaining the quality of the contents by the excellent sealing property at the time of resealing before and after opening the container, and when the cap is opened, the sealed state of the cap main body and the outlet plug is easily released. In other words, since the inner ring and the inner plug are sealed only in the vertical direction (vertical direction), the cap and the outlet plug are not rotated together while being engaged, and the cap can be easily used. There is an effect that the opening / closing operation can be performed.

  The best mode for carrying out the present invention will be described below with reference to the drawings.

FIG. 1 is a cross-sectional view showing a state in which the cap for a liquid container of the present invention is attached to the mouth of the container, FIG. FIG. 4 is a cross-sectional view showing a state in the middle of capping the cap and the discharging tap in FIG. 2 to the container mouth part, and FIG. 4 is a cross-sectional view showing a state in which the capping state of FIG. .

In these figures, a cap body 1 having a top 15 and a skirt 14 formed with a thread 12 hanging from the peripheral edge of the top and threaded into the container mouth on the inner peripheral surface, is in close contact with the inner peripheral surface of the container mouth. A pour-out formed in a trumpet shape having a cylindrical body 23 and an outer flange portion 25 extending outward from the upper outer peripheral surface of the cylindrical body, and an upper tip 22 of the cylindrical body expanding outward. A cap for a liquid container comprising an inner plug 2 is shown, and an annular seal portion 10 that protrudes inward and seals the container mouth portion 31 is formed on the inner surface of the corner portion of the top portion 15 and the skirt 14 of the cap body 1. The annular seal portion 10 is formed with an annular outer ring 10 a that seals the outer end of the container mouth portion 31. Further, the annular seal portion 10 is formed with a locking projection 13 that comes into contact with the upper surface of the outer flange portion 25 when fitted to the container mouth portion inward in the radial direction.
An inner ring 11 is formed inward from the locking protrusion 13 on the inner surface.

The inner ring 11 abuts against the inner peripheral surface of the trumpet-shaped tip portion 22 of the outlet plug, or the upper surface of the inner flange portion 21 extending inward from the lower inner peripheral surface of the tubular body 23, thereby blocking the outlet plug. It is designed to be sealed. That is, the technical feature of the present invention is that the sealing state of the container mouth portion and the outlet plug is such that the annular seal portion 10 and the outer ring 10a connected to the annular seal portion 10 and the outer peripheral surface of the tubular body 2 are connected to the container mouth portion. Sealing from three directions is mainly composed of a lateral seal. Apart from this sealing structure, the sealing state of the cap main body and the outlet plug is the locking protrusion on the inner surface of the top portion 15 of the cap main body 1. The inner ring 11 that hangs down from the inside of the portion 13 abuts on the inner peripheral surface of the trumpet-shaped tip 22 of the outlet plug or the upper surface of the inner flange portion 21 that extends inward from the inner peripheral surface of the cylindrical body 23. In this respect, it is constituted by a vertical seal.

The inner ring 11 that controls the vertical seal is in contact with the inner peripheral surface of the trumpet-shaped tip portion 22 of the dispensing plug 2 or the upper surface of the inner flange portion 21 that extends inward from the inner peripheral surface of the cylindrical body 23. However, preferably, the inner ring 11 is composed of two rings, and the outer inner ring 11b is in contact with the inner peripheral surface of the trumpet-shaped tip portion 22 of the spouting stopper 2 so as to be in contact with the inner inner ring 11a. If it comes into contact with the upper surface of the inner flange portion 21 extending inward from the inner peripheral surface of the cylindrical body 23 and cooperates to seal the stopper during dispensing, the sealing performance of the container is further improved. In addition, when opening, both forms do not hinder the opening operation.

When capping the cap body 1 and the discharging stopper 2 to the container opening 31, the cap body 1 and the discharging stopper 2 are separately fitted to the container opening 31 to reduce the work efficiency. In addition, since the safety of the fitting operation is not preferable, the cap main body 1 and the discharging plug 2 are inserted into the container mouth portion 31 in a pre-engaged state.
In the present invention, an annular or a plurality of protrusions 26 extending outward from the outer peripheral surface of the outer flange portion 25 of the dispensing plug 2 are formed, and also extended inward from the inner peripheral surface of the annular seal portion of the cap body 1. Thus, the annular or plurality of projections 16 of the discharging plug are formed to support the protrusion 26 of the discharging plug from below.

Thereby, the engagement force of the cap body 1 side of the convex portion 16 and the pouring inner plug 2 side of the projection 26, the engager cap body 1 and the pouring of the plug 2, capping of the container mouth portion in a stable state It is attached to the process. Engagement of the cap body 1 and the pouring of the plug 2 is dissociated when capping is complete, the cap body 1 and the pouring of the cap and the pouring in plug co around during engagement cap opening of the stopper 2 There is no longer a need to do.
The left side of FIG. 1 shows the state of the cap main body and the discharging plug in the middle of the capping process, and the right side of FIG. 1 shows the state of the cap main body and the discharging plug when the capping process is completed.

The shape and material of the container 3 are not particularly limited. However, since the contents of the container 3 are usually seasonings, edible oils, beverages, and the like, polyethylene, polypropylene, polyethylene terephthalate suitable for these uses, or Is made of a material such as glass, and is generally bottle-shaped. In the illustrated example, the container 3 is intended to be a cylindrical plastic bottle.

The cap body 1 is formed with a knurl in the axial direction on the outer peripheral surface of the skirt 14 so as to function as a slip stopper at the time of first opening and screwing. Further, a band 41 is provided at the lower end of the skirt 14 with a tamper evidence mechanism 40 for preventing unauthorized opening, and the band 41 and the cap body 1 are integrally formed. The tamper-evident mechanism 40 connects the skirt 14 of the cap body 1 and the band 41 below the cap body 1 with an easily breakable connecting rib 42, and a stopper 43 is provided on the skirt 14 and the band 41, and these are screwed. The container body 31 is rotated in synchronization with the wearing direction (capping direction), and the cap body 1
If the cap body 1 is rotated in the unscrewing direction (opening or unsealing direction), the connecting rib 42 is broken leaving the band 41 at the step 32 below the container mouth. As a result, the tampering is immediately recognized, and the cap body 1 can be unscrewed (opened) from the container opening 31.

In addition, the outer ring 10a connected to the annular seal portion 10 of the cap body 1
Is in contact with the upper end corner and the side surface of the container mouth portion 31 to be sealed with the container mouth portion, and its shape is formed in a bowl shape corresponding to the shape of the upper end portion of the container mouth portion. It is preferable. The container mouth portion 31 is sealed so as to be wrapped by the outer ring 10a and the outer peripheral surface of the cylindrical body of the outlet plug.

The pouring spigot 2 is fitted to the container mouth 31 to prevent liquid drainage of seasonings and the like and prevent dripping. The outer flange portion 25 is disposed above the cylindrical body 23. The tip portion 22 is formed in a trumpet shape above it.
In the present invention, the inner ring 11 hanging from the top 15 of the cap body 1 is in contact with the inner flange 21 extending inward from the inner peripheral surface of the trumpet-shaped tip 22 or the inner peripheral surface of the cylindrical body 23. The sealing performance of the cap body 1 and the stopper during pouring is maintained.
In the present invention, the inner ring 11 is divided into two, the outer inner ring is in contact with the inner surface of the trumpet-shaped tip portion of the outlet plug, and the inner inner ring is inward of the inner peripheral surface of the cylindrical body. It is important to make contact with the upper surface of the inner flange portion that extends to the cap body 1 , so that the sealing performance of the cap body 1 and the spouting stopper 2 becomes better.

Next, a method of using the liquid container cap configured as described above will be described.
First, the container 3 suitable for the seasoning etc. which are the contents, and the cap main body 1 and the spouting stopper 2 which comprise the liquid container cap corresponding to this are selected. Next, when the dispensing plug 2 is pushed into the inside from the lower surface of the cap body 1, the protrusion 26 of the dispensing plug 2 and the convex portion 16 of the cap body are easily engaged with the annular seal portion 10 of the cap body 1. It is possible to stop, and the stopper 2 is not dropped out from the cap body 1 in the subsequent capping line. The container 3 is filled with the contents, and then, in the capping line, the cap body 1 and the band 41 are integrally screwed into the container opening 31 engaged with the stopper during pouring, and thereby the container The outlet plug 2 and the cap body 1 are fitted into the mouth portion 31 to be liquid-tight.

The container covered with the pouring spigot and the cap body obtained in this way has excellent sealing properties due to the different sealing configurations in the vertical and horizontal directions, and the cap and the pouring spigot when opening the cap. Can be opened easily without having to rotate around.

In use, when the cap body 1 is turned in the opening direction, the easily breakable tether rib 42 of the tamper evidence mechanism 40 is cut, and the cap body 1 can be easily removed from the container mouth portion 31. In the present invention, the sealing performance between the cap body 1 and the dispensing plug 2 is maintained only by the inner ring 11 depending from the cap top 16, so that the cap body 1 and the pouring plug are opened when the cap is opened. The sealing performance with the outlet plug 2 is inevitably eliminated, and the cap body 1 and the outlet plug 2 do not rotate together when the cap is opened.

As mentioned above, although the suitable aspect of this invention was demonstrated, it cannot be overemphasized that a specific structure is not limited to this and can be suitably changed and added in the range which does not deviate from the summary of this invention.

The liquid container cap of the present invention can be used in general for containers that store liquids, but the applicability is extremely high when the cap body and the spout stopper are co-rotating.

It is sectional drawing of the state which mounted | wore the container mouth part with the cap for liquid containers of this invention. The state where one inner ring that controls the vertical seal between the cap body of the present invention and the outlet plug is in contact with the upper surface of the flange portion that extends inward from the inner peripheral surface of the cylindrical body of the outlet plug FIG. It is sectional drawing which shows the state in the middle of capping the cap of FIG. It is sectional drawing which shows the state which advanced the capping state of FIG. 3, and was completely capped by the container opening part. It is sectional drawing of the cap for liquid containers of a prior art example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1, I Cap main body 10 Annular seal part 10a Outer ring 11 Inner ring 11a Inner inner ring 11b Outer inner ring 12 Cap thread 13 Locking protrusion 14 Cap skirt 15 Top 16 Protruding part 2, II Outlet plug 21 Inner flange portion 22 Trumpet-shaped tip portion 23 Tubular body 25 Outer flange portion 26 Protrusion 3, III Container 31 Container opening portion 32 Step portion 40 Tamper evidence mechanism 41 Band 42 Connecting rib 43 Stopper a Composite seal b Sealing cylindrical wall c Mouth plug d Mounting cylinder wall e Flange part f Container mouth inclined part g, h Thread
i Top plate

Claims (2)

A cap body having a top and a skirt formed with a thread that hangs from the peripheral edge of the top and is threaded into the container mouth on the inner peripheral surface; a cylindrical body that is in close contact with the inner peripheral surface of the container mouth; and an upper portion of the cylindrical body A cap for a liquid container having an outer flange portion extending outward from an outer peripheral surface, and an outlet stopper formed in a trumpet shape in which an upper end of the cylindrical body is expanded outwardly;
An annular seal portion that protrudes inward and seals the container mouth portion is formed on the inner surface of the corner portion of the top portion of the cap body and the skirt,
The annular seal part is formed with an annular outer ring that seals the outer tip of the container mouth part,
From the annular seal portion, a locking projection is formed that comes into contact with the upper surface of the outer flange portion when fitted to the container mouth portion radially inwardly.
An inner ring is formed inward from the locking projection on the top inner surface,
The inner ring is composed of two rings, the outer inner ring is in contact with the inner peripheral surface of the trumpet-shaped tip end portion of the dispensing plug, and the inner inner ring extends inward from the inner peripheral surface of the cylindrical body. A liquid container cap that abuts the upper surface of the inner flange portion and cooperates to seal the stopper during dispensing. An annular or a plurality of protrusions extending outward from the outer peripheral surface of the flange is formed on the outer flange portion of the dispensing middle plug, and the annular seal portion inner periphery is formed on the annular seal portion of the cap body. annular or more annular or more liquid containers cap of claim 1, wherein the projection is formed to support the projection from below of the plug in the exit infusion extending from the surface inwardly.

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