JPH1077057A - Cap of liquid content pouring container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent an opening/closing lid from being outwardly deviated when a container is plugged, and to prevent loosening of connection of a cap body to the opening/closing lid by projectingly providing an inclined projected ring to be engaged with a fitting ring on an inner circumference of a side cylindrical wall of the opening/ closing lid, and projectingly providing a bulged projected bar. SOLUTION: When a cap to which an inner plug is connected is placed on a container mouth part of a container filled with the liquid content, an insertion cylinder 21 of the cap body is inwardly deviated through a fitting cylinder 6 because the interference d1 between the fitting cylinder 6 of the inner plug and the container mouth part is large. An inner side engagement surface 27 of a fitting ring of the cap body is engaged with an inclined projected ring 39 of an opening/closing lid, and a side cylindrical wall of the opening/closing lid is inwardly pressed, and at the same time, pushed upward against the plug placing force. The plug placing force is effectively applied through the side cylindrical wall, and the side cylindrical wall of the opening/ closing lid is inwardly moved, a bulged projected bar 40 of the side cylindrical wall is engaged with its lower surface over a bulged part 28 of the fitting ring to firmly secure the inner circumference of the side cylindrical wall to the bulged part 28 of the fitting ring.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stopper cap for a container for discharging a liquid content, and more particularly, to a cap base which is fitted to a container mouth by a stopper and hingedly attached to the cap base by a hinge. The present invention relates to a heat-resistant cap including an opening / closing lid.

[0002]

2. Description of the Related Art A container provided with a fitting portion at the upper end of a container mouth,
There have been various types of content liquid dispensing containers including a heat-resistant cap including a cap base fitted into the container opening and an opening / closing lid attached to the cap base by a hinge so as to be freely opened and closed. As one of them, a cap for a content liquid discharging container as shown in FIG. 8 has been proposed. In the figure,
A1 is a container provided with a fitting portion 71 in the container mouth 70, and B1 is an inner plug provided with a fitting cylinder 72 which engages with the inner periphery of the container mouth 70.

[0003] Cd is a cap, which comprises a cap base C1 and an opening / closing lid C2 attached to the cap base C1 by a hinge 73 so as to be openable and closable. Cap base C1
Is a fitting tube 74 fitted to the fitting portion 71 of the container opening 70.
And a fitting insertion tube 75 that engages with the fitting tube 72 of the inner plug B1 and an upper wall 76. On an upper surface of the upper wall 76, a pouring tube 77,
A fitting ring 79 having a bulge 78 on the outer periphery of the upper end is provided upright.

When the lid C2 is closed, the inner periphery of the side cylindrical wall 80 is engaged with the bulging portion 78 so as to be fitted to the cap base C1. Then, in order to strengthen the fit between the cap C and the container opening 70 and further enhance the sealing property of the inner plug B1, the fitting tube 72 of the inner plug B1 and the container opening 70 are used.
The interference between the inner circumference and the interference between the fitting tube 74 of the cap C and the fitting portion 71 of the container opening 70 is made large.

[0005]

However, in the above-mentioned conventional cap, the fitting tube 72 of the inner plug and the container opening 7 are not provided.
If the interference with the inner circumference of the inner cap 0 is large, when the cap is plugged into the container, the container cylinder 70 of the inner plug B1
2, the fitting insertion tube 75 of the cap base C1 is biased inward, and accordingly, the upper wall 76 and the fitting ring 79 of the cap base C1 are also biased inward. The lower end may be inclined inward, and the outer peripheral edge of the upper surface of the upper wall 76 on the fitting tube 74 may be lowered. Further, when plugging after hot filling, it is not possible to avoid the problem that the side cylindrical wall 80 of the opening / closing lid C2 is inclined outward and spreads due to the tapping force applied to the opening / closing lid C2.

[0006] From the above, loosening occurs between the fitting ring 79 erected on the upper wall 76 of the cap base C1 and the inner periphery of the side cylindrical wall 80 of the opening / closing lid C2, and the fitting of the opening / closing lid C2 occurs. At the same time, the adhesive pressure between the upper wall 76 and the lower surface of the side cylinder wall 80 decreases, and a gap is formed. In addition, when the content liquid is heated and filled, cooling is performed by applying cooling water after stoppering. In the cooling step, the inside of the cap becomes negative pressure, and the upper peripheral edge of the fitting cylinder 74 of the cap base C1 and the opening / closing lid C2 are closed. The problem has arisen that the cooling water enters the cap from the gap with the lower end surface of the side cylindrical wall 80.

SUMMARY OF THE INVENTION In view of the above problems, the present invention provides a cap comprising a cap base fitted to a container mouth by a stopper and an opening / closing lid attached to the cap base by a hinge so as to be freely opened and closed. In the fitted container, at the time of plugging, the opening / closing lid is prevented from being biased outward, so that the fitting between the cap base and the opening / closing lid is not loosened, and in the cooling step after heating and filling, the inside of the cap is removed. It is an object of the present invention to provide an improved cap for a content liquid discharging container, with the technical problem of preventing cooling water from entering the container.

[0008]

SUMMARY OF THE INVENTION In order to solve the above-mentioned technical problems, the present invention provides a cap for a content liquid discharging container,
A content liquid including a container having a fitting portion at the upper end of the container mouth, a cap including a cap base fitted to the container mouth, and an opening / closing lid attached to the cap base so as to be openable and closable by a hinge. In the pouring container, on the upper surface of the upper wall of the cap base, a fitting ring having an outer peripheral edge at the upper end as a bulging portion and an inner side as an engaging surface is erected, and an inner peripheral portion of the opening / closing lid on the side tube wall inner peripheral portion. An inclined projecting ring having an inclined surface engaging with the engaging surface of the fitting ring is protruded, and a bulging ridge engaged with a bulging portion of the fitting ring is formed at a lower end of the inner peripheral side wall of the side cylinder. A configuration characterized by being provided is adopted.

[0009]

Next, a first embodiment of the present invention will be described with reference to FIGS. In FIG. 1, A
Is a container formed of glass, PET or other hard synthetic resin, and includes a container body 1 and a container opening 2. At the upper end of the container mouth 2, the container mouth 2
A fitting portion 3 whose diameter is enlarged from the outer circumference is formed, and a holding ridge 4 for holding the container is formed at the lower end.

Reference numeral B denotes an inner plug formed by injection molding, which comprises a cover wall 5 and a fitting cylinder 6 which is engaged with and fitted to the container opening 2. As the material resin, polyethylene or another soft synthetic resin is used. C is a cap formed by injection molding, and includes a cylindrical cap base 7 and an opening / closing lid 9 connected to the cap base 7 by a hinge 8. As the material resin, a polypropylene or other hard synthetic resin having a high softening temperature is used.

As shown in FIG. 2, a cut groove 11 having a predetermined shape is provided on the lower surface of the cover wall 5 of the inner plug B in order to form a removing portion 10 serving as an outlet for the content liquid. Part 1
A finger ring 13 is provided on the upper surface of the lens 0 via a connecting piece 12. When a finger is put on the finger hanging ring 13 and pulled upward, the cutting groove 11 is cut, the removing portion 10 is cut off, and an outlet for the content liquid is formed.

Below the cover wall 5, there is formed an inner cylinder 14 which hangs down from the peripheral edge thereof. The lower end of the inner cylinder 14 is extended outward and is connected to the fitting cylinder 6 so as to be connected. It is 15. An insertion groove 16 is formed by the fitting tube 6, the inner tube 14, and the connecting portion 15. A cover plate 17 that protrudes outward in a flange shape is formed at the upper end of the fitting tube 6 so as to cover the upper end of the container opening 2. A positioning projection 18 is provided at the bottom of the insertion groove 16.
A convex piece 19 is provided on the lower surface of the connecting portion 15 corresponding to the positioning projection 18 so that the position of the positioning projection 18 can be easily checked from outside and the position can be adjusted.

As shown in FIG. 3, the cap base 7 has a fitting tube 20, a fitting insertion tube 21, and an upper wall 22 for fitting the inner plug B to fit into the container mouth 2. I have. A fitting surface 23 is formed on the inner periphery of the fitting cylinder 20, a ridge 24 is formed at several places, and a fitting ridge 25 is formed below the fitting surface 23. A positioning groove 26 is provided at a lower end of the insertion tube 21 at a position corresponding to the hinge 8. The insertion tube 21 is positioned so that the positioning projection 18 of the inner plug B engages with the positioning groove 26, and the inner plug B
The fitting tube 6 of the inner plug B is pressed against the inner periphery of the container opening 2 at the time of tapping to be fastened.

On the upper surface of the upper wall 22, a fitting ring 29 having an inner peripheral surface as an engagement surface 27 and a bulging portion 28 provided on the outer peripheral edge of the upper end is provided upright. Protrudes to the inside of the fitting insertion tube 21 to form a protruding edge 30;
A pouring cylinder 31 is provided upright on the upper surface of the protruding edge 30.
The peripheral edge of the upper end of the pouring cylinder 31 is expanded outward to form a spout outlet lip 32.

The hinge 8 is integrally formed with the cap base 7 and the opening / closing lid 9, and springs 33 are provided on both sides of the hinge 8. When the opening / closing lid 9 is opened / closed, the hinge 8 is moved between the closed position and the open position. I try to deviate.

The opening / closing lid 9 is composed of a top wall 34 and a side wall 35. At the center of the lower surface of the top wall 34, the inside of the injection tube 31 is fitted, and the outlet lip 31 is sealed. Seal ring 3
6 are provided. On the hinge side of the sealing ring 36, 3
A plurality of projections 37 are provided to guide and align the sealing ring 36 to engage the spout lip 32 when the lid 9 is closed. An inclined protruding ring 39 having a downwardly inclined surface 38 that engages with the engaging surface 27 of the fitting ring 29 is formed at an intermediate portion of the inner peripheral side wall 35 of the opening / closing lid 9. On the periphery, a bulging ridge 40 that engages with the bulging portion 28 of the fitting ring 29 is formed.
A knob 41 is formed on the outer periphery of the lower end opposite to the hinge 8.

The mutual connection between the fitting portion 3 of the container opening 2, the fitting tube 6 of the inner plug B, the fitting tube 20 of the cap base 7, the fitting ring 29 and the side tube wall 35 of the opening / closing lid 9. As shown in FIG. 4, the interference d1 is formed between the outer periphery of the fitting tube 6 of the inner plug B and the inner periphery of the container opening 2, as shown in FIG.
Fitting surface 23 provided on the inner circumference of fitting cylinder 20 and container opening 2
An interference d2 is formed between the fitting portion 3 and the outer peripheral surface. Further, the interference d3 is provided between the outer diameter of the bulging portion 28 of the fitting ring 29 of the cap base 7 and the inner diameter of the opening / closing lid 9.
The inner diameter of the bulge 40 of the opening / closing lid 9 is smaller than the outer diameter of the bulge 28 of the fitting ring 29.
It is equal except for the interference between the lower outer diameter. The inclined protruding ring 39 of the side cylindrical wall 35 of the opening / closing lid B is arranged such that the inclined surface 38 is engaged with the engaging surface 27 on the inner periphery of the fitting ring 29. The inclined projecting ring 39 is provided on the side cylindrical wall 3.
5 may be provided over the entire inner circumference, or may be provided at regular intervals.

Next, the operation and effect of the above configuration will be described. In the container of the present embodiment, the cap C is plugged after the filling of the content liquid. Be combined. At that time, the insertion tube 21 of the cap base 7 is aligned so that the positioning projection 18 of the inner plug B engages with the positioning groove 26 thereof, and is inserted into the insertion groove 16 of the inner plug B, The cover plate 17 of the inner plug B is locked by the ridge 24 formed on the inner periphery of the fitting cylinder 20.

Next, the cap C to which the inner stopper B is connected
Is plugged into the container opening 2 of the container filled with the content liquid. At the time of stoppering, first, the lower surface of the fitting ridge 25 of the fitting cylinder 20 of the cap base 7 comes into contact with the upper end of the fitting portion 3 of the container opening 2.
Next, the inner peripheral surface of the fitting ridge 25 is elastically contacted with the outer peripheral surface of the fitting portion 3, and the outer periphery of the fitting cylinder 6 is lowered while being elastically contacted with the inner periphery of the container opening 2. Finally, the upper wall 22 abuts against the upper end of the container mouth 2, and the fitting ridge 25 engages with the lower surface of the fitting portion 3, completing the tapping.

At the time of tapping, since the interference d1 between the fitting tube 6 of the inner stopper B and the container mouth portion 2 is large, the fitting insertion tube 21 of the cap base 7 is inserted through the fitting tube 6. Will be biased toward At this time, the inner engagement surface 27 of the fitting ring 29 of the cap base 7 engages with the inclined protruding ring 39 of the opening / closing lid 9 to press the side cylindrical wall 35 of the opening / closing lid 9 inward, and at the same time, the tapping force. Acts to push up against Thereby, the tapping force effectively acts through the side tube wall 35 of the opening / closing lid 9 and the side tube wall 35 of the opening / closing cover 9 is moved inward. The positional relationship between the cap base 7 and the fitting ring 29 remains unchanged, and the inner circumference of the side cylindrical wall 35 and the bulging portion 2 of the fitting ring 29
8 can be kept in a firm state.

When the tapping is completed, the interference d1 between the fitting tube 6 of the inner plug B and the container opening 2 is large, so that the inner plug B is strongly fastened to the inner periphery of the container opening 2, The content liquid is securely sealed. Also, the interference d2 is set between the outer peripheral surface of the fitting portion 3 of the container opening 2 and the fitting surface 23 of the fitting tube 20 of the cap base 7.
And the fitting projection 25 is fitted on the lower surface of the fitting portion 3 of the container opening 2, so that the fitting of the cap base 7 is strengthened.

In the case of heat-sterilizing the content liquid, the content liquid that has been heat-sterilized is filled, sealed with a stopper, and then the container is turned upside down to sterilize the air in the container and then return the container to its original state. After being returned and cooled with a shower of cooling water from above, it is carried out as a product. When filling with heat, the interference d
Since 1 and d2 are large, there is no trouble that the cap C comes off even if the temperature of the material resin becomes high, and the sealing property is sufficiently maintained.

After the sterilization process is completed, the hot-filled container is returned to its original state, and the cooling water is showered from above. Since the interference d3 between the circumference and the fitting ring 29 is large and the bonding is kept in close contact, the cooling water is prevented from being sucked from between.

When opening the product container, use the knob 41
When the opening / closing lid 9 is opened and the finger hanging ring 13 is pulled up, the cutting groove 11 is cut and the removing portion 10 can be easily removed, and an outlet is formed. When the opening / closing lid 9 is closed after opening, the sealing ring 36 is fitted to the inner periphery of the spouting tube 31 to prevent the outflow of the content liquid and to prevent the side cylinder wall 3 from flowing out.
The bulging protrusions 5 of FIG. 5 ride over the bulging portion 28 of the fitting ring 29 and engage with the lower surface thereof, so that the opening / closing lid 9 is securely fitted.

Next, a second embodiment in which a part of the structure of the inner plug B and the cap C is partially changed will be described. In the above-described embodiment, the inner stopper B is employed, and the spout cylinder is formed in the inner stopper. However, in the second embodiment, the inner stopper B is not used, and the spout cylinder is erected on the upper wall of the cap base. Then, a removed portion is formed. The differences from the first embodiment will be mainly described with reference to FIGS. In the figure, Ca is a cap, and a cap base 7a and a hinge 8 are attached to the cap base 7a.
a and an opening / closing lid 9a attached so as to be able to open and close freely.

The cap base 7a includes a fitting tube 20a, an upper wall 22a, and a fitting tube 50 that is fitted into the inner periphery of the container opening 2 so as to fit into the container opening 2. A cover wall 51 extending inward of the fitting tube 50 is formed inside the upper wall 22a, and a pouring tube 52 is formed on the upper surface of the cover wall 51 along the inner periphery of the fitting tube 50. Have been. The peripheral edge of the upper end of the pouring cylinder 52 is expanded outward to form a spout outlet lip 53. A cutting groove 54 is engraved on the lower surface of the covering wall 51 along the pouring cylinder 52, and a removing portion 55 is formed.
A finger ring 57 is provided on the upper surface of the removing portion 55 via a connecting piece 56. On the upper surface of the upper wall 22a, an inner peripheral surface is an engagement surface 27a, and a bulge portion 28a
The fitting ring 29a provided with is provided upright. Open / close lid 9
a, the fitting ring 29
An inclined protruding ring 39a having a downwardly inclined surface 38a that engages with the engagement surface 27a of FIG.

The interference between the inner periphery of the container mouth 2 and the fitting tube 50, the interference between the container mouth 2 and the fitting tube 20a, and the inner periphery of the side tube wall 35a and the fitting ring 29a. All of the interferences are large as in the first embodiment (all the interferences are not shown). The other configuration of the cap is the same as that of the first embodiment, and the operation and effect based on the above configuration are the same as those of the first embodiment.

Next, a third embodiment will be described with reference to FIG. In the present embodiment, the shape of the ejection tube in the second embodiment is changed. In the figure, Cb denotes a cap, which comprises a cap base 7b and an opening / closing lid 9b attached to the cap base 7b by a hinge 8b so as to be openable and closable. The cap base 7b includes a fitting tube 20b, an upper wall 22b, and a fitting tube 60 that is inserted into the inner periphery of the container opening 2 so as to fit into the container opening 2. The lower end of the fitting tube 60 is bent inward to form a connecting portion 61, and the inner end of the connecting portion 61 is bent upward to form a pouring tube 62. The peripheral edge of the upper end of the spout cylinder 62 is expanded outward to form a spout outlet lip 63.

A cover wall 64 is formed in the middle of the pouring cylinder 62 at a position corresponding to the upper wall, and a cutting groove 65 is formed on the lower surface of the covering wall 64 along the pouring cylinder 62, and a removing portion 66 is formed. A finger ring 68 is provided on the upper surface of the removing section 66 via a connecting piece 67. As in the second embodiment, a fitting ring 29b having an inner peripheral surface as an engagement surface 27b and a bulging portion 28b provided on the outer peripheral edge at the upper end is provided upright on the upper surface of the upper wall 22b. An inclined protruding ring 39b having a downwardly inclined surface 38b that engages with the engagement surface 27b is formed at an intermediate portion of the inner periphery of the side cylindrical wall 35b of the lid 9b. The other configuration of the cap is the same as that of the second embodiment, and the operation and effect based on the above configuration are the same as those of the second embodiment.

[0030]

Since the present invention is configured as described above, it has the following effects. On the upper surface of the upper wall of the cap base,
A fitting ring having an engaging surface inside is provided, and the engaging surface is joined to the inclined surface provided on the inclined protruding ring of the side cylindrical wall of the opening / closing lid. The mating ring presses the side cylinder wall of the opening / closing lid inward, so that the fitting between the bulging portion of the fitting ring of the cap base and the inner periphery of the side cylinder wall of the opening / closing lid is not loosened, and the connection state between the two is changed. It can be surely kept.

This makes it possible to prevent cooling water from entering the cap in the cooling step after heating and filling.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional front view showing a first embodiment of the present invention and showing a connected state of a container, an inner plug, and a cap.

FIGS. 2A and 2B are drawings showing an inner plug, in which FIG. 2A is a plan view, FIG. 2B is a vertical sectional front view, and FIG.

3A and 3B are drawings showing the cap in an open state, wherein FIG. 3A is a plan view, FIG. 3B is a longitudinal front view, and FIG. 3C is a bottom view.

FIG. 4 is an enlarged cross-sectional view of a main part showing a connected state of the container, the inner plug, and the cap.

FIG. 5 shows the second embodiment of the present invention, and is a longitudinal sectional front view showing a connected state of a container and a cap.

FIGS. 6A and 6B are views showing a cap in an open state according to the second embodiment, in which FIG. 6A is a plan view, FIG. 6B is a longitudinal sectional front view, and FIG.

FIGS. 7A and 7B are drawings showing a cap in an open state according to the third embodiment, wherein FIG. 7A is a plan view, FIG. 7B is a longitudinal sectional front view, and FIG.

FIG. 8 is an explanatory view showing a conventional pouring container.

[Explanation of symbols]

 A, A1 Container B, B1 Inner plug C, Ca, Cb, Cd Cap 2, 70 Container mouth 3, 71 Fitting part 5, 51, 64 Covering wall 6 Fitting cylinder 7, 7a, 7b, C1 Cap base 8 , 8a, 8b, 73 Hinge 9, 9a, 9b, C2 Opening / closing lid 20, 20a, 20b, 74 Fitting tube 21, 75 Fitting insert tube 22, 22a, 22b, 76 Upper wall 27, 27a, 27b Engaging surface 28 , 28a, 28b, 78 Swelling portion 29, 29a, 29b, 79 Fitting ring 35, 35a, 35b, 80 Side cylindrical wall 38, 38a, 38b Inclined surface 39, 39a, 39b Inclined projecting ring 40 Projected ridge 50 , 60,72 Fitting tube

Claims (1)

[Claims] A container provided with a fitting portion at an upper end of a container mouth;
A content liquid dispensing container comprising a cap formed of a cap base fitted to the container mouth and an opening / closing lid attached to the cap base so as to be openable and closable by hinges. A fitting ring having an upper end outer peripheral portion as a bulging portion and an inner side as an engaging surface is erected, and an inclined surface which engages with the engaging surface of the fitting ring at an intermediate portion of the inner peripheral side wall of the opening / closing lid. Characterized in that a slanted projecting ring having a protrusion is provided, and a bulging ridge for engaging with a bulging portion of the fitting ring is protrudingly provided at the lower end of the inner peripheral side wall. .