JP3569060B2 - Cap with inner stopper for content liquid pouring container - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
TECHNICAL FIELD The present invention relates to a cap with an inner plug, particularly a cap with a tightly fitted cap at a high temperature so as to be applicable to heating and filling of a content liquid.
[0002]
[Prior art]
Various types of content liquid dispensing containers in which a cap provided with a dispensing cylinder is fitted to a mouth portion of a container containing a content liquid are known in the related art. There is a container shown in
As shown in FIG. 7, a fitting ridge 60 is provided on the outer periphery of the upper end of the mouthpiece portion of the container.
The cap is injection-molded using a polyethylene resin as a raw material, and includes a cap base 61 and an opening / closing lid 63 hinged to the base by a hinge 62.
The cap base 61 is provided with a fitting tube 64, an upper wall plate 65 covering the upper end thereof, and a pouring tube 66 supported by the upper wall plate 65 and extending vertically.
[0003]
On the inner periphery of the fitting tube 64, there is provided a fitting ridge 67 fitted to the fitting ridge 60 provided on the container mouth tube portion. The fitting tube 68 is engaged with the inner periphery of the tube portion.
The fitting tube 68 and the fitting tube 64 form a fitting portion of the cap to the container.
A fitting ring 69 for fitting the opening / closing lid 63 is provided on the upper surface of the upper wall plate 65, and a ring is vertically provided on the lower surface of the opening / closing lid 63.
[0004]
[Problems to be solved by the invention]
However, the conventional container is not suitable for heat filling for sterilizing the content liquid and the air in the container.
Recently, when the content liquid is food, heat sterilization may be performed, but at the time of processing, filling the container with the heat sterilized content liquid, stoppering after filling and sealing the content liquid, the container The air in the head space is passed through the heated content liquid by inverting the air, and the air in the container is sterilized by the heat of the content liquid.
Next, the hot-filled container is cooled and carried out as a product.
[0005]
In the above heat sterilization treatment, the following problem occurs in the conventional container.
If polyethylene is used as the material resin for the cap, the polyethylene has a low softening temperature and softens at high temperatures, so that the cap is weakly fitted to the container during heating and filling, and the cap may come off due to an external force. When the container is turned upside down after hot filling, there is also a problem that the cap may fall off.
[0006]
Further, at the time of tapping after hot filling, the cap softens due to heat and becomes weak, and at the time of tapping, the side wall of the lid is opened outward, the force is dispersed also in the oblique direction, and the tapping is performed with a predetermined force. The problem of not being done has arisen.
[0007]
In cooling, the hot-filled container is cooled in the shower of cooling water, but as the cooling progresses, the liquid and air inside the container and the air inside the cap shrink, and the space inside the cap becomes negative pressure. Become.
Therefore, there has been a problem that the cooling water is sucked into the space inside the cap from between the cap base 61 and the opening / closing lid 63.
[0008]
In addition, it is well known that a cap provided with a dispensing cylinder is screwed to a container mouth cylinder, but since the cap is molded using a polyethylene resin, the cap softens due to high temperature during heating and filling. Therefore, the fitting of the cap may be weakened and a trouble may occur, and the inside of the cap becomes a negative pressure during cooling, so that it is inevitable that the cooling water is sucked.
[0009]
The present invention solves the above-mentioned problem by strengthening the fitting of the cap and preventing the cap from being easily detached by external force or causing trouble even when the cap becomes hot at the time of hot filling. The technical task is to make tapping efficiently at the time of hot filling, and to prevent the cooling water from being sucked into the cap when cooling the hot-filled container. And a cap with an inner cap fitted with the inner plug, and an object of the present invention is to provide a cap with an inner plug suitable for heat filling.
[0010]
[Means for Solving the Problems]
The present invention provides a container to be filled with a content liquid as a cap with an inner cap as an inner cap of a pour container for heating and filling a content liquid, and a discharge tube fitted to the container mouth portion to achieve the above technical problem. Provided, an inner plug using low-density polyethylene as the material resin, a cap base and an upper lid that are fitted with the inner plug and fitted into the container mouthpiece, and a cap that uses polypropylene as the material resin. In the dispensing container for heating and filling the content liquid , an airtight ring is provided on the upper surface of the cover plate of the cap base or the upper surface of the upper wall plate of the inner plug, and the upper lid of the cap is fitted and fastened to the outer periphery of the airtight ring. A cap with an inner plug characterized by having an engagement ring is employed.
[0011]
Further, in order to strengthen the fitting between the cap base and the upper lid and to better prevent suction of cooling water, a step is provided at the upper peripheral edge of the cap base, and the peripheral surface of the reduced-diameter cover plate is used as a fitting surface, A bulging part is provided on the upper part of the fitting surface, and a cap is formed on the inner periphery of the side wall of the cap upper lid, wherein a fitting surface fitted to the fitting surface and having a bulging part at the lower end is formed. I do.
[0012]
Further, in a container provided with a fitting ridge in the container mouth portion, as a specific means to achieve the technical problem, a container provided with two upper and lower fitting ridges in the container mouth portion, and a dispensing tube A fitting portion for supporting the pouring cylinder is provided, an inner plug using low-density polyethylene as a material resin, a cap base and an upper lid adapted to be fitted to the inner plug, and polypropylene is used as the material resin. And a filling container for heating and filling the content liquid provided with the cap, wherein the inner stopper is provided with a fitting cylinder provided with a fitting ridge fitted on an upper fitting ridge of the container mouthpiece. A wall plate, and the cap base has a fitting surface fitted on the outer periphery of the fitting tube of the inner plug, and a fitting ridge fitted on a lower fitting ridge of the container mouthpiece portion. and it provided the receiving cylinders, when joined to the wall plate upper surface on the inner plug and mating ring for fitting together the top cover side walls on the upper surface And a cover plate provided with a dense ring, the upper lid engages the outer periphery of the airtight ring on the top wall inner surface, characterized by comprising an engagement ring which abuts the cover plate upper surface inner plug Adopt a cap with.
[0013]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, a first embodiment of the present invention will be described with reference to the drawings.
In FIG. 1, A is a container main body formed of glass, PET, or other hard synthetic resin, and includes a container body 1 and a container opening 2.
An upper fitting ridge 3 projecting outward is formed at the upper end of the container mouth tube portion 2, and a lower fitting ridge 4 projecting further outward than the fitting ridge 3 is formed below the upper fitting ridge 3. The holding ridge 5 for holding the container is formed at the lower end.
[0014]
B denotes an inner plug, which is formed by injection molding using low-density polyethylene, and has a pouring tube 6 and a fitting portion 7 for holding the pouring tube and fitting the inner plug to the container mouth tube portion 2. Consists of
C denotes a cap, which is formed by injection molding using polypropylene or another hard synthetic resin having a high softening temperature, and includes a cap base C1 and an upper lid C2.
[0015]
As shown in FIGS. 2 and 3, the inner plug B includes a pouring tube 6 and a fitting portion 7, and the fitting portion 7 covers a fitting tube 8 and an upper end portion of the fitting tube 8. It is formed of a wall plate 9 and an engagement tube 10 which is located below the upper wall plate and is fitted to the container mouth tube portion.
A knurl 11 is engraved on the upper part of the outer periphery of the fitting tube 8, and a fitting ridge 12 fitted on the upper fitting ridge 3 of the container mouth tube part 2 is formed on the inner periphery.
[0016]
The pouring tube 6 is formed on the upper surface of the upper wall plate 9 so as to have an inner periphery flush with the inner periphery of the engaging tube 10, and the upper peripheral edge of the pouring tube 6 is expanded outward. The spout lip 13 is formed.
A cutting groove 14 is provided in the upper wall plate 9 in the engagement cylinder 10 so as to leave a thin wall along the inner periphery of the engagement cylinder 10, and the upper wall plate in the interior serves as a removing portion 15. .
A finger ring 16 is provided on the upper surface of the removing section 15 via a connecting piece.
[0017]
As shown in FIGS. 2, 4 and 5, the cap base C <b> 1 has a fitting cylinder 20 fitted on the outer periphery of the inner plug B and an annular projecting inward so as to cover the upper wall plate 9 of the inner plug. And a cover plate 21.
On the inner periphery of the fitting tube 20, a fitting surface 23 engraved with a knurl 22 fitted to the knurl 11 on the outer periphery of the inner plug, and an engaging ridge 24 engaging with the lower end of the fitting tube 8 of the inner plug. And a fitting ridge 25 to be fitted to the lower fitting ridge 4 of the container mouth tube portion 2.
On the upper surface of the annular cover plate 21, a fitting ring 27 having a bulging portion 26 at the upper end is provided, and an airtight ring 28 is provided inside the fitting ring 27.
[0018]
The upper lid C2 of the cap comprises a top wall 30 and a side wall 31, and a sealing ring which fits on the lower surface of the top wall 30 to fit the inner periphery of the spout cylinder 6 of the inner plug B and seals the spout port 13 thereof. 32, and an engagement ring 33 that engages with the outer periphery of the airtight ring 28 of the cap base C1.
The lower end of the engagement ring 33 keeps a slight gap between the lower end of the engaging ring 33 and the upper surface of the cover plate 21 of the cap base C1. When the upper lid C2 is pressed, the lower end of the engagement ring 33 comes into contact with the upper surface of the cover plate 21. I have.
The side wall 31 is formed such that the lower end of the inner periphery is fitted to the bulging portion 26 of the fitting ring 27 of the cap base C1, and a knob 34 is provided at the lower end of the outer periphery.
[0019]
Regarding the dimensional relationship between the fitting ridges 3 and 4 of the container barrel 2, the inner plug B, and the cap C, the outer diameter of the upper fitting ridge 3 of the container barrel 2 and the fitting of the inner stopper B are described. the inner diameter of the wear sleeve 8, and the outer diameter and the inner diameter of the fitting cylinder 20 of the cap substrate C 1 of the lower fitting projection 4 is approximately equal to leave interference respectively.
[0020]
The diameter of the outer circumference of the knurl 11 of the inner plug is made larger than the inner diameter of the knurl 22 engraved on the fitting surface 23 of the cap base C1, so that when fitted, the two knurls are engaged with each other so that they cannot be rotated. It has become.
An interference d is formed between the airtight ring 28 of the cap base C1 and the engagement ring 33 of the upper lid C2 so that airtightness can be maintained when the upper lid C2 is fitted. An interference is also provided between the ring 27 and the bulging portion 26.
[0021]
Next, the operation and effect of the above configuration will be described.
The heat sterilization process of the contents liquid is generally a step of filling the contents with the heat-sterilized contents liquid, a stoppering step of sealing the container, a step of turning the container upside down to sterilize the air in the container, and using cooling water. It consists of a cooling process.
At the time of tapping after filling with the heating content liquid, first, the cap base C1, the cap upper lid C2, and the inner plug B are connected.
At the time of coupling, the cap upper lid C2 has the lower end inner circumference of the upper lid side wall 31 fitted into the bulging portion 26 of the fitting ring 27 of the cap base C1, and the inner circumference of the engagement ring 33 airtightly sealed with the airtight ring 28. Since they are fitted, the upper lid C2 is detachably attached to the cap base C1.
[0022]
With the cap C and the inner plug B, the knurl 22 engraved on the fitting surface 23 of the cap base C1 meshes with the knurl 11 engraved on the outer periphery of the inner plug B, and both are fitted non-rotatably, Further, the engaging projection 24 of the cap base C1 engages with the lower end of the fitting tube 8 of the inner plug B to prevent the inner plug from dropping off, and the annular cover plate 21 makes contact with the upper wall plate 9 of the inner plug. As a result, the two are firmly connected.
[0023]
Next, the combined cap is plugged into the container mouthpiece.
At the time of tapping, first, the fitting ridge 12 of the inner plug B is fitted to the upper fitting ridge 3 of the container mouth tube portion 2 and the fitting ridge 25 of the cap base C1 is fitted to the lower fitting ridge 4 of the container. At the same time, the fitting projections 12 and 25 of the inner plug and the cap descend over the fitting projections 3 and 4 of the container mouth tube portion 2 and engage with the lower surface thereof. It is fitted at the same time.
At this time, the upper wall plate 9 is brought into contact with the upper end of the container mouthpiece at the same time as the fitting, and the plugging step is completed.
[0024]
Also, at the time of tapping, since the gap between the lower end of the engagement ring 33 of the upper lid C2 and the upper surface of the cover plate 21 of the cap base C1 is small, when the upper lid C2 is pressed, the engagement ring 33 is The pressing force is transmitted to the cap base C1 by abutting against the upper surface.
Further, since polypropylene is used as the material of the cap, it does not soften even at high temperatures and does not deform when pressed.
Therefore, the stopper is efficiently opened without the upper lid side wall 31 being expanded at the time of stoppering.
[0025]
After filling is completed, the filling container is turned upside down to sterilize the air in the headspace, but since the cap does not soften at high temperatures, it does not come off due to external force or fall off due to the container being inverted.
After the sterilization process is completed, the hot-filled container is returned to its original state, and a shower of cooling water is applied from above. However, even if the inside of the cap becomes a negative pressure, the inner periphery of the lower end portion of the upper lid side wall 31 is fitted with a fitting ring. 27, and the inner circumference of the engagement ring 33 is airtightly fitted to the airtight ring 28, so that cooling water is sucked from between the upper lid C2 and the cap base C1. Is prevented.
Next, the hot-filled container is cooled and carried out as a product.
[0026]
When opening the product container, the upper lid C2 is opened with the knob 34, and the finger ring 16 is pulled up, whereby the cutting groove 14 is cut and the removing portion 15 can be easily removed, thereby forming a spout. .
When the upper lid C2 is closed after opening, the sealing ring 32 is fitted into the spout, preventing outflow of the content liquid, and the inner periphery of the lower end of the side wall 31 is fitted into the bulging portion 26 of the fitting ring 27. , The upper lid C2 is securely maintained on the base C1.
[0027]
Next, a second embodiment in which a part of the configuration of the inner plug B and the cap C is changed will be described with reference to FIG.
As shown in the figure, an airtight ring 40 is provided upright on the upper surface of the upper wall plate 9 of the inner plug B outside the pouring cylinder. The ring 40 is raised so as to protrude from the upper surface of the cover plate 21a of the cap base C1, and a protruding portion 41 is provided at the protruding portion.
The inner circumference of the cover plate 21a of the cap base C1 is larger than the outer circumference of the bulging portion 41 of the hermetic ring 40, and the engaging ring 33a provided on the cap upper lid C2 is located between the bulging portion 41 and the cap. The fitting margin d1 is fitted to the outer periphery of the airtight ring 40.
[0028]
The other configuration is almost the same as that of the first embodiment, except that the airtight ring 40 is erected on the inner plug B, so that the inner plug B is molded using low-density polyethylene and is softer than the cap C. Therefore, compared with the first embodiment, it is possible to obtain a large interference margin, and it is possible to obtain a special operation and effect that the airtightness can be further improved.
[0029]
Next, a third embodiment in which the fitting portion between the cap base C1 and the upper lid C2 is changed instead of the fitting ring 27 will be described with reference to FIG.
As shown in the figure, a step portion 42 is provided on the upper peripheral edge of the fitting cylinder 20 of the cap base C1, and the outer periphery of the cover plate 21 whose diameter is reduced becomes a fitting surface 43. An outlet 44 is provided. The step portion 42 and the fitting surface 43 form a fitting portion for the upper lid C2.
The side wall 31a of the upper lid C2 of the cap is extended downward by a length corresponding to the step 42, a fitting surface 45 is formed on the lower inner periphery, and a bulging portion 46 is provided at the lower end.
[0030]
Other configurations are almost the same as those of the first embodiment, but when the upper lid C2 is fitted, the bulging portion 46 at the lower end of the side wall 31a goes down over the bulging portion 44 of the cap base C1, and the upper lid C2 and the cap base The fit with C1 can be made stronger.
Further, since the two bulging portions 44 and 46 are fitted and fastened, it is possible to obtain a special operation and effect that suction of cooling water can be more reliably prevented during cooling.
[0031]
Next, a fourth embodiment in which a cap is screwed to a container mouth section will be described with reference to FIG.
As shown in the drawing, a reduced diameter portion 50 is formed in an upper portion of the container mouth tube portion 2 of the container body A, and a screw 51 is formed below the reduced diameter portion 50.
The fitting portion of the inner plug B is formed of a fitting tube 8a, an upper wall plate 9a, and an engagement tube 10, and is fitted to the reduced diameter portion 50 on the upper part of the container mouth tube portion 2.
The outer diameter of the fitting tube 8a is substantially equal to the outer diameter of the container mouth tube portion 2.
[0032]
The cap base C1 includes a fitting tube 20 and a cover plate 21. The upper end of the inner periphery of the fitting tube 20 is fitted to the fitting portion of the inner plug B in cooperation with the lower surface of the cover plate 21. A fitting surface 52 is provided, and a screw 53 is provided below the fitting surface 52 so as to be screwed with the screw of the container mouth tube portion 2.
As in the third embodiment, as shown in FIG. 9B, a step portion 42 is provided on the upper peripheral edge of the fitting cylinder 20 of the cap base C1, and a bulging portion is provided on the upper end of the fitting surface 43. 44 are provided.
A fitting surface having a bulging portion 46 at the lower end is provided on the inner periphery of the lower end of the side wall 31a of the upper lid C2.
[0033]
At the time of sealing after filling with the heating content liquid, the inner stopper B is fitted to the reduced diameter portion 50 at the upper end of the container mouth tube portion 2 and then the upper lid C2 and the cap base C1 are connected to each other, and the cap C is placed in the container. The fitting is screw-fitted to the barrel 2.
When the fitting of the cap C is completed, the upper wall plate 9a of the inner plug B is pressed against the upper end of the container opening by the cover plate 21 of the cap base C1, and the inner plug B is strongly fitted to the container opening 2; The container is sealed.
Further, the space between the cap base C1 and the fitting portion of the inner plug B is sealed by the cover plate 21 and the fitting surface 52 of the cap base, so that the inside and outside of the cap are shut off.
At this time, the cap and the container are connected by a screw, and the cap is formed of polypropylene. Therefore, the fitting is firmly maintained without softening even at a high temperature.
[0034]
Upon cooling after sealing the container, the fitting portion between the cap base and the upper lid is sealed by the two bulging portions, and further, the airtightness is maintained by the engagement ring 33 and the airtight ring 28 of the upper lid. The suction of the cooling water due to the negative pressure is prevented.
[0035]
In each of the above embodiments, a cap in which the base and the upper lid are separated is used as the cap. However, a cap in which the upper lid (open / close lid) is hinged to the base so as to be freely opened and closed by the hinge shown in FIG. 7 is used. Is also good.
Needless to say, the inner plug is not limited to the one shown in the embodiment.
[0036]
【The invention's effect】
The present invention has the following effects because it is configured as described above.
Molded using polypropylene as the material resin of the cap, the fitting of the cap is strengthened, and it does not soften even if the cap becomes hot at the time of heat filling. Even when the filled container is turned upside down, it does not easily come off or cause troubles due to external force.
[0037]
In cooling the hot-filled container, even if the inside of the cap becomes negative pressure, the inner circumference of the engagement ring of the upper lid is tightly fitted with the airtight ring, so that cooling water flows from between the upper lid and the cap base. There is no suction.
[0038]
In the case of a container provided with a fitting ridge in the container mouth portion, the cap and the inner plug are fitted to the container via the engagement ring of the upper lid when the plug is heated and filled. Is performed efficiently.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view of a cap with a plug according to the present invention.
FIG. 2 is a vertical sectional side view of the container, inner plug, and cap of the present invention.
3A and 3B are drawings showing an inner plug, wherein FIG. 3A is a plan view, FIG. 3B is a longitudinal side view, and FIG. 3C is a bottom view.
FIGS. 4A and 4B are drawings showing a cap, in which FIG. 4A is a partially longitudinal side view, and FIG.
FIG. 5 is a bottom view of the cap lid.
FIG. 6 is a plan view of a cap base.
FIG. 7 is a vertical sectional side view showing a conventional container.
FIGS. 8A and 8B are views showing the second embodiment, in which FIG. 8A is a sectional side view in which an inner plug and a cap are assembled, and FIG. 8B is an enlarged sectional view of a main part.
9A and 9B are diagrams showing a third embodiment, in which FIG. 9A is a partial cross-sectional side view of a cap, and FIG. 9B is an enlarged cross-sectional view of a main part.
FIG. 10 is a partial cross-sectional side view showing a fourth embodiment.
[Explanation of symbols]
A Container main body B Inner plug C Cap C1 Base C2 Upper lid 2,51 Container mouth tube part 3, Upper fitting ridge 4 Lower fitting ridge 6,66 Discharge cylinder 8,8a, 20,64 Fitting cylinder 9, 9a, upper wall plates 12, 25, 67 fitting protrusions 21, 21a cover plates 23, 43, 45, 52 fitting surfaces 26, 41, 44, 46 bulging portion 27 fitting rings 28, 40 airtight ring 30 Wall 31, 31a Side wall 32 Sealing ring 33, 33a Engagement ring 42 Step d, d1 Tightening margin

Claims (4)

A container for filling the content liquid,
Fitted to the container mouth tube portion, provided with a pouring tube, an inner stopper using low-density polyethylene for the material resin,
A filling container comprising a cap base and an upper lid fitted with the inner stopper and fitted to the container mouth portion, and having a cap using polypropylene as a material resin, which is heated and filled with a liquid content ,
Wherein provided an airtight ring covering plate the upper surface of the cap base, the pouring vessel for liquid contents heated filling, characterized in that a locking ring which is fitted secured to the outer periphery of the airtight ring upper lid of the cap Inner cap. A container for filling the content liquid,
Fitted to the container mouth tube portion, provided with a pouring tube, an inner stopper using low-density polyethylene for the material resin,
A filling container comprising a cap base and an upper lid fitted with the inner stopper and fitted to the container mouth portion, and having a cap using polypropylene as a material resin, which is heated and filled with a liquid content ,
The wall plate upper surface on the inner plug is provided an airtight ring, the dispensing container for liquid contents heated filling, characterized in that a locking ring which is fitted secured to the outer periphery of the airtight ring upper lid of the cap Inner cap. A stepped portion is provided on an upper peripheral edge of the cap base, a reduced-diameter cover plate peripheral surface is used as a fitting surface, and a bulging portion is provided above the fitting surface. 3. The filling container according to claim 1, wherein a fitting surface having a bulging portion provided at a lower end thereof is formed. A container provided with two upper and lower fitting ridges on the container mouth portion, a fitting portion for supporting the pouring tube and the pouring tube, an inner plug using low-density polyethylene as a material resin,
A pour container comprising a cap base and an upper lid so as to be fitted to the inner plug, and a heat-filled content liquid having a cap using polypropylene as a material resin,
The inner plug includes a fitting cylinder provided with a fitting ridge fitted to an upper fitting ridge of the container mouth portion, and an upper wall plate,
The cap base, a fitting surface fitted to the outer periphery of the fitting cylinder of the inner plug,
A fitting cylinder provided with a fitting ridge to be fitted to a lower fitting ridge of the container mouth portion,
And a cover plate provided with the joining to the wall plate upper surface on the inner plug and both mating ring engaging the lid side walls on the top and hermetically ring,
The cap upper lid has an engagement ring which engages with the outer periphery of the airtight ring on the inner surface of the top wall and abuts against the upper surface of the cover plate. .

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