JPH1059397A - Cap for container for ejecting content liquid - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve fitting strength and sealability, strengthen screw coupling between a lower lid and an upper lid at the time of capping and also prevent cooling water from entering a cap by providing a protruding ring having a slope on an internal face along a periphery of an upper end of a fitting cylinder of the lower lid and joining the slope to a slope at a lower end of a side cylindrical wall. SOLUTION: Since interference at the time of capping is d1>d2, a fitting cylinder 6 and an attaching cylinder 11 of a lower lid are shifted inward. At this time, a slope 9 of a protruding ring 10 provided on an upper end periphery of the fitting cylinder 4 presses a side cylindrical wall 21 inward and at the same time functions to push upward against capping force. Therefore the capping force effectively works through the side cylindrical wall 21 of an upper lid, a screwing cylinder 28 of the upper lid is pushed upward, and a positional relation between the screwing cylinder 28 and the attaching cylinder 11 does not change, so that screwing of the screw can be kept rigid. When capping is completed, the protruding ring 10 and the lower end of the side cylindrical wall 21 are joined via the slope, tight contact can be kept without change in adhesion pressure.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cap for a content liquid discharging container, and more particularly to a cap comprising a stopper-type lower lid and an upper lid screwed to the lower lid.

[0002]

2. Description of the Related Art A liquid container comprising a container provided with a fitting ridge at the upper end of a container mouth, a cap comprising a lower lid fitted to the container mouth and an upper lid screwed to the lower lid. There are various types of dispensing containers in the past, and as one of them, a cap of a content liquid dispensing container as shown in FIG. 7 is known. FIG.
In the figure, C is a lower lid fitted to the container mouth by tapping, and D is an upper lid screwed to the lower lid C with a screw. The lower lid C has a fitting tube 40 fitted on the container mouth, an upper wall 41, and a fitting tube 42 engaged with the inner periphery of the container mouth. An engagement surface 43 and a fitting ridge 44 are provided. On the upper surface of the upper wall 41, a mounting cylinder 45 is erected in a shape obtained by extending the fitting cylinder 42, and a screw 46 for screwing the upper lid is engraved on the outer periphery of the mounting cylinder 45. I have. The upper lid D includes a top wall 50 and a side cylindrical wall 51, and a screw 5 screwed to the screw 46 is provided on the inner surface of the top wall 50.
A threaded cylinder 53 engraved with 2 is vertically provided. In the figure, reference numeral 54 denotes an injection tube, and 55 denotes a sealing ring. For stoppering, the upper lid C is screwed onto the lower lid D, and the combined cap is plugged into the container mouth.

[0003]

In the above conventional cap, as shown in FIG. 8 (a), the fitting cylinder 4 of the cap lower lid is used to strengthen the fit between the cap and the container mouth.
2. The interference d1a between the inner wall 2 and the inner periphery of the container opening 56, and the interference d2a between the engaging surface 43 of the fitting tube 40, the fitting projection 44 and the fitting projection 57 of the container opening 56. It has been proposed that the interference d1a between the fitting cylinder 42 and the inner periphery of the container opening 56 be particularly large in order to take a large amount of the cap and further improve the sealing performance of the cap.

However, the fitting cylinder 42 and the container mouth 56
When the interference d1a between the inner periphery and the inner periphery becomes large, when the cap is plugged into the container, as shown in FIG.
6, the fitting cylinder 42 of the lower lid is deviated so as to be inclined inward, and accordingly, the upper wall 41 and the attachment cylinder 45 are also deviated inward. Therefore, the attachment cylinder 45
This causes a problem that loosening occurs between the screw 46 and the screw 52 of the screwing cylinder 53.

[0005] Also, with the bias toward the inside of the upper wall 41,
The fitting cylinder 40 also leans inward, and when the tapping is completed, the fitting ridge 44 is engaged with the lower surface of the fitting ridge 57 of the container mouth 56, so that the downward pulling force is reduced. Working, fitting tube 4
The adhesive pressure between the upper surface of the peripheral edge of O and the lower end surface of the side cylindrical wall 51 of the upper lid D is reduced, and a problem that a gap is formed also arises.

At the time of tapping, the tapping force applied to the upper lid acts in a direction in which the screw 52 of the screwing cylinder 53 and the screw 46 of the mounting cylinder 45 are vertically separated from each other. Top lid D
The lowering of the bonding pressure with the lower end of the side cylinder wall 51 and the generation of a gap have caused a problem that the loosening between the screw 46 and the screw 52 is further increased by the action of separating the screw up and down.

Further, when the content liquid is heated and filled, cooling is performed by adding cooling water after plugging. In the cooling step, the inside of the cap becomes negative pressure, and the upper surface of the peripheral edge of the fitting cylinder 40 and the upper lid D are closed. There has been a problem that the cooling water enters the cap from the gap between the lower end surface of the side cylinder wall 51 and the cap.

The present invention has been made in consideration of the above problems, and in a container in which a cap comprising a stopper-type lower lid and a screw-type upper lid is fitted to a container mouth, the fitting strength and sealing property are improved. In order to prevent the screw connection between the lower lid and the upper lid from being loosened during tapping, and to prevent cooling water from entering the cap in the cooling process after heating and filling, the technical problem was improved. An object of the present invention is to provide a cap for a content liquid discharging container.

[0009]

SUMMARY OF THE INVENTION In order to achieve the above technical object, the present invention provides a container having a fitting ridge at the upper end of a container mouth, a lower lid fitted to the container mouth, and In a content liquid dispensing container having a cap consisting of an upper lid screwed to the lower lid, a projecting ring having an inclined surface rising from the upper surface of the upper wall on the inner surface, on the upper peripheral edge of the fitting cylinder of the lower lid. And an inclined surface that is joined to the inclined surface is formed at the lower end of the side cylinder wall of the upper lid, or a cylindrical projecting ring is set up on the upper peripheral edge of the fitting cylinder of the lower lid. The upper lid is adapted to engage with the outer periphery of the lower end of the side cylindrical wall of the upper lid.

[0010]

Next, an embodiment of the present invention will be described with reference to the drawings. In FIG. 1, A is a container, which is formed using glass or PET or other hard synthetic resin as a raw material.
And the holding ridge 3 are formed. B is a cap, B1 is a lower lid fitted to the container mouth 1, B2 is an upper lid screwed to the lower lid, all of which are formed of polyethylene or other synthetic resin, and are formed by a lower lid B1 and an upper lid B2. Is constituted.

As shown in FIG. 2, the lower cover B1 of the cap B
Has a fitting tube 4 and an upper wall 5 fitted to the container mouth 1 and a fitting tube 6 fitted to the inner periphery of the container mouth. On the inner periphery of the fitting tube 4, an engagement surface 7 that engages with the peripheral surface of the fitting ridge 2 of the container mouth 1 at the time of fitting, and a fitting projection that engages with the lower surface of the fitting ridge 2. A ridge 8 is provided, and a protruding ring 10 having an inclined surface 9 which rises inclining from the upper surface of the upper wall 5 is formed on the upper peripheral edge of the fitting cylinder 4. On the upper surface of the upper wall 5, a mounting cylinder 11 is erected in a shape extending from the fitting cylinder 6, and a screw 12 for screwing the upper cover B2 is engraved on a peripheral surface of the mounting cylinder 11. Have been. At the upper end of the mounting cylinder 11,
A mounting edge 13 protruding inward is provided, and a pouring cylinder 14 extending vertically is provided at an inner peripheral edge of the mounting edge 13.

The peripheral edge of the upper end of the pouring cylinder 14 is expanded outward to form a spout lip 15, and a partition 16 is formed at the lower end of the pouring cylinder 14. A cutting groove 17 is formed on the lower surface of the partition wall 16 while leaving a thin wall along the inner periphery of the pouring cylinder 14.
The partition 16 inside is a removed portion, and a finger ring 19 is provided on the upper surface of the partition 16 via a connecting piece 18.

[0013] As shown in FIG.
Comprises a top wall 20 and a side cylinder wall 21,
A narrow strip 22 is formed on the outer peripheral surface of the, and a protruding edge 23 that protrudes outward from the peripheral surface is provided below the narrow strip 22. Between the protruding edge 23 and the lower end surface 24 of the side cylindrical wall 21, an inclined surface 25 cut obliquely downward from the inner peripheral edge of the protruding edge 23 is formed. At the center of the inner surface of the top wall 20, there is a pouring cylinder 1
4, a sealing ring 26 fitted down is provided vertically, and a screw 27 screwed to the mounting cylinder 11 is engraved at a position corresponding to the mounting cylinder 11 on the outer lower lid. A screwing cylinder 28 is vertically provided.

As shown in FIGS. 4 and 5, the upper cover B2 of the cap B has its screwing tube 28 screwed to the mounting tube 11 of the lower cover B1. 24 is the lower lid B1
On the upper wall 5, the inclined surface 25 is joined to the inclined surface 9 of the lower lid B1, and the lower end of the side cylindrical wall 21 is in close contact with the protruding ring 10 of the lower lid B1 and the upper wall 5. Further, the sealing ring 26 is fitted on the inner periphery of the upper part of the spouting tube 14 and seals the spout lip 15.

Next, the mutual relationship between the container A and the lower lid B1 and the upper lid B2 of the cap B will be described with reference to FIG. As shown in FIG. 5A, the inner periphery of the container mouth 1 and the lower lid B
A fitting margin d1 is provided between the fitting cylinder 6 and the fitting cylinder 6 of the fitting cylinder 4.
An interference d2 is provided. In particular, the interference d1 is larger than the interference d2, and is larger than the conventional interference. A fixed interference is provided between the inner periphery of the upper part of the discharge tube 14 of the lower lid B1 and the outer periphery of the sealing ring 26 of the upper lid B2, and the outer diameter of the projecting ring 10 of the lower lid B1 is It is larger than the outer diameter of the edge 23, and the inclination of the inclined surface 9 and the inclination of the inclined surface 25 are substantially equal.

Next, the operation and effect of the above configuration will be described. In the container of the present embodiment, the cap B is fitted with a stopper after filling with the content liquid, but the cap B is formed by screwing the upper lid B2 to the lower lid B1 before stoppering. Next, the cap B is plugged into the container opening 1 filled with the content liquid. At the time of stoppering, first, the lower surface of the fitting ridge 8 of the fitting cylinder 4 of the lower lid B1 abuts on the upper end of the fitting ridge 2 of the container opening 1.
Next, the inner peripheral surface of the fitting projection 8 is elastically contacted with the outer peripheral surface of the fitting projection 2, and the outer periphery of the fitting cylinder 6 is lowered while being elastically contacted with the inner periphery of the container opening 1. Finally, the upper wall 5 abuts against the upper end of the container opening 1 and the fitting ridge 8 engages with the lower surface of the fitting ridge 2 to complete the tapping.

In tapping, the interference d1 is large,
Since the interference d1> d2, the fitting tube 6 and the mounting tube 11 of the lower lid B1 are deviated inward. At this time, the projecting ring 10 provided on the peripheral edge of the upper end of the fitting tube 4 is used.
When the inclined surface 9 is joined to the inclined surface 25 of the side cylindrical wall 21, the side cylindrical wall 21 of the upper lid B1 is pressed inward and acts upwardly against the tapping force. Thereby, the tapping force effectively acts through the side tube wall 21 of the upper cover B2, and the screwing tube 28 of the upper cover B2.
Is pushed upward, so that the positional relationship between the screwing cylinder 28 and the mounting cylinder 11 does not change, and the screwing of the screw can be maintained in a strong state.

At the completion of the tapping, the fitting ridge 8 of the lower lid B1
Engages with the lower surface of the fitting ridge 2 of the container opening 1 and is drawn downward.
Since the lower end portions are joined by inclined surfaces, the adhesive pressure is not changed and the close contact is maintained.

In the case of heat-sterilizing the content liquid, the content liquid which has been heat-sterilized is filled, and after stoppering and sealing, the container is turned upside down to sterilize the air in the container, and then the container is returned 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 B comes off even if the material resin becomes high temperature, and the sealing property is sufficiently maintained.

After completion of the sterilization process, the hot-filled container is returned to its original state, and a shower of cooling water is applied from above. Since the inclined surfaces 9 and 25 are in close contact between the ring 10 and the lower end surface 24 of the side cylindrical wall 21 of the upper lid B2,
The cooling water is prevented from being sucked in from that time.

When the product container is opened, the upper lid B2 is opened and the finger ring 19 is pulled up, so that the cutting groove 17 is cut and the removed portion can be easily removed, thereby forming a pouring hole. When the upper lid B2 is closed after opening, the sealing ring 26 is fitted to the inner periphery of the pouring cylinder 14 to prevent the outflow of the content liquid, and the side cylindrical wall 2 of the upper lid B2 of the cap B is closed.
Since the inclined surface 25 at the lower end is in close contact with the inclined surface 9 of the protruding ring 10 of the lower lid B1, the inside of the cap B is sealed and sanitary bacteria in the air do not enter.

In the description of the above embodiment, the interference between the fitting cylinder and the inner periphery of the container opening is made large, and the interference d1> d2 is set.
Although the effect was emphasized for the case of, even if the interference is the same as before, and d1 and d2 are almost equal, and there is no need to consider the deviation of the lower lid at the time of tapping, The plugging force is effectively applied by joining the inclined surfaces, and at the same time, it is possible to obtain the effect of preventing loosening of the screw at the time of plugging and maintaining airtightness in the cap.
Therefore, the present invention can be applied to all caps including a normal stopper-type lower lid and a screw-type upper lid, regardless of the size of the interference.

[0023]

Next, the projecting ring 10 of the lower lid B1 and the upper lid B
In the above-described embodiment, the lower lid B1 is provided with the protruding ring 10 having the inclined surface 9 on the upper peripheral edge of the fitting cylinder 4, and the upper lid B is provided.
A projecting edge 23 and an inclined surface 25 inclined downward from the inner peripheral edge of the projecting edge 23 are provided at a lower portion of the second side wall 21 so that the respective inclined surfaces are engaged with each other.
The shape of the lower end of the side cylindrical wall 21 of the upper lid B2 can be variously changed within a range in which the same purpose and operation and effect as those of the embodiment can be achieved.

As modifications, four embodiments will be described with reference to FIG. In the first embodiment, as shown in FIG. 6 (a), a ridge 10a having an inner peripheral surface as an inclined surface 9a is provided on the periphery of the lower lid B1, and the lower end of the side cylindrical wall 21 of the upper lid B2 is cut. This is an inclined surface 25a. In the second embodiment,
As shown in FIG. 6B, an inclined surface 25b is provided on the peripheral edge of the lower end of the side cylindrical wall 21 of the upper lid B2, and the protruding ring 10 of the lower lid B1 is the same as that of the above-described embodiment. In the third embodiment, as shown in FIG. 6C, the side cylindrical wall 2 of the upper lid B2 is used.
1 The lower end is horizontal and the lower end surface 24a is provided.
One protruding ring 10 is the same as that of the above embodiment. The ridges 10a or the protruding rings 10 of the first to third examples press the lower end of the side cylindrical wall 21 of the upper lid B2 inward and upward at the time of stoppering, so that the same operation and effects as those of the above-described embodiment are provided. It is.

In the fourth embodiment, as shown in FIG. 6 (d), a cylindrical protruding ring 10b is provided on the peripheral edge of the upper end of the lower lid B1, and the lower end of the side cylindrical wall 21 of the upper lid B2 is connected to the horizontal lower end face 24a. It was done. At the time of plugging, only the lower end of the side cylinder wall 21 is pressed inward, and no upward push-up force is exerted. Therefore, in terms of prevention of loosening of the screw, a certain effect is obtained although it is slightly inferior to the embodiment. The same operation and effect as the embodiment are brought about in that the inside of the cap B is made airtight.

[0026]

Since the present invention is configured as described above, it has the following effects. A projection ring having an inclined surface on the inner surface is provided on the upper peripheral edge of the fitting tube of the lower lid, and the inclined surface is joined to the inclined surface at the lower end of the side cylinder wall. At the same time as pushing inwardly, it acts to push up against the tapping force, and moves the screwed cylinder inward with the attached tube and pushes it upward. The screw connection with the screw is not loosened, and the screw connection can be maintained in a strong state.

Since the screwed state is kept unchanged by moving the screwed cylinder inward together with the mounted cylinder, the interference between the inner periphery of the container opening and the fitting cylinder of the lower lid is maintained. Can be increased, and the fitting strength and sealing property of the cap can be improved. Since the lower end of the side wall of the upper lid is hermetically sealed by the protruding ring provided on the upper peripheral edge of the fitting cylinder, it is possible to prevent cooling water from entering the cap in the cooling step after heating and filling. Can be.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a container and a cap of the present invention.

FIG. 2 is a drawing of a lower lid of a cap, (a) is a plan view,
(B) is a partial cross-sectional front view, and (c) is a bottom view.

3A and 3B are views of an upper lid of a cap, in which FIG. 3A is a front view in partial cross section, and FIG. 3B is a bottom view.

FIG. 4 is an assembly view of a cap.

FIG. 5 is an explanatory view showing a relationship between a container and a cap, and (a).
FIG. 3B is a diagram showing a state before plugging, and FIG.

FIG. 6 is a view showing a modified embodiment of the lower end of the side cylinder wall of the upper lid and the lower lid protruding ring.

FIG. 7 is a conventional cap.

FIG. 8 is a view showing a relationship between a conventional container and a cap,
(A) is an explanatory view before plugging, (b) is an explanatory view after plugging.

[Explanation of symbols]

 A Container B Cap B1, C Lower lid B2, D Upper lid 1, 56 Container mouth 2, 57 Fitting ridge 4, 40 Fitting cylinder 5, 41 Upper wall 6, 42 Fitting cylinder 7, 43 Engaging surface 8 , 44 Fitting ridge 9, 9a, 25, 25a, 25b Inclined surface 10, 10b Projecting ring 10a Protrusion 11, 45 Mounting cylinder 12, 27, 46, 52 Screw 20, 50 Top wall 21, 51 Side cylinder wall 23 Projecting edge 24, 24a Lower end surface 28, 53 Screwing cylinder

Claims (2)

[Claims] 1. A liquid content comprising: a container having a fitting ridge at an upper end of a container mouth; a cap comprising a lower lid fitted to the container mouth and an upper lid screwed to the lower lid. In the dispensing container, a protruding ring having an inclined surface on the inner surface, which rises up from the upper surface of the upper wall, is formed on the upper peripheral edge of the fitting tube of the lower lid, and the inclined surface is joined to the inclined surface at the lower end of the side wall of the upper lid. A cap for a content liquid discharging container, characterized in that a cap is formed. 2. A liquid content comprising a container provided with a fitting ridge at an upper end of a container mouth, a lower lid fitted to the container mouth, and a cap comprising an upper lid screwed to the lower lid. In the dispensing container, a cylindrical protruding ring is erected on the upper peripheral edge of the fitting cylinder of the lower lid,
A cap for a content liquid dispensing container, wherein the cap is adapted to engage with an outer periphery of a lower end of a side cylinder wall of an upper lid.