JP2010052820A - Cap - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cap capable of reducing the number of components and manufacturing steps, and setting the internal pressure in a container to be equal to the outside air pressure with excellent accuracy by using a simple constitution. <P>SOLUTION: The cap includes a cap body 3 which is topped-cylindrical, and attached to a mouth portion of a container 2 for accommodating a content, and has a spouting hole 32b for spouting the content in a top wall portion 32, and an overcap 5 which is attachably/detachably suitable for an outer peripheral surface of the cap body 3 to open/close the spouting hole 32b. In a peripheral wall portion 51 of the overcap 5, at least a part of a fitting portion to be suitable for an outer peripheral surface of the cap body 3 is formed thinner than other parts, and formed in an elastically-deformable thin-walled portion 54. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a cap that is attached to the mouth of a container that contains liquid contents.

Conventionally, for example, when contents such as liquid foods and seasonings are stored in a container, volatile components are generated from the contents or the volume of the contents expands due to changes over time or environmental changes such as temperature. As a result, the internal pressure of the container may increase. When the internal pressure of the container is increased in this way, the contents may be unintentionally scattered outside the container, or the cap may be opened to open the container. Therefore, for example, in the cap described in Patent Document 1, a through hole is formed in the cap body mounted on the mouth portion of the container, and a valve member is fitted on the back surface of the cap body at a position facing the through hole. When the internal pressure of the container increases, a gap is generated between the valve member and the cap body, and the pressure is released to the outside of the container from the through hole communicating with the gap.
JP 2006-182425 A

  However, since the cap body and the valve member are separated from each other in the cap described in Patent Document 1, the number of parts increases and a process of assembling these members at the time of manufacture is required. Moreover, in the assembly process of these members, a slight difference may occur in the relative positions of the members, and it is difficult to ensure the accuracy of the operating pressure.

  The present invention has been made in view of such circumstances, and provides a cap capable of reducing the number of parts and manufacturing processes and accurately making the internal pressure of the container equal to the external pressure using a simple configuration. It is an object.

In order to achieve the above object, the present invention proposes the following means.
That is, the cap according to the present invention is a cap body having a top tube shape, which is attached to the mouth of a container for storing the contents, and in which a pouring hole for pouring the contents is formed in the top wall. And an overcap that is detachably fitted to the outer peripheral surface of the cap main body and opens and closes the pouring hole, and is fitted to the outer peripheral surface of the cap main body at the peripheral wall portion of the overcap At least a part of the part is formed to be thinner than the others and is a thin part that can be elastically deformed.

  According to the cap of the present invention, since at least a part of the fitting portion in the peripheral wall portion of the overcap is the thin-walled portion, for example, a volatile component generated from the contents in the container, an increase in the outside temperature, or the like When the internal pressure of the container is increased by the above, the thin portion is bulged and deformed radially outward, and the portion of the fitting portion of the overcap that is located in the thin portion and the outer peripheral surface of the cap body are sealed. The internal pressure is released to the outside of the overcap through the thin wall portion. In this way, it becomes possible to make the internal pressure of the container equal to the external air pressure through the thin part of the overcap, so that the internal pressure of the container increases and the contents are scattered from the dispensing hole to the outside of the container. It is prevented that the cap is opened and the dispensing hole is opened.

  Furthermore, since the above-described effects are achieved by forming the thin portion on the overcap, it is possible to prevent an increase in the number of parts of the cap and the manufacturing process. Further, since the above-described effects can be achieved by bulging and deforming the thin portion radially outward, the accuracy of the operating pressure can be easily ensured.

  Moreover, the cap which concerns on this invention WHEREIN: The pouring pipe | tube with which the inside communicates with the said pouring hole is standingly arranged in the ceiling wall part of the said cap main body, The ceiling wall part in the said overcap is the said pouring cylinder side. It is good also as being formed in the shape of the curved surface which bulges toward the inside, and the top part contact | abuts the opening edge of the said extraction pipe | tube, and it is formed thinly and can be elastically deformed.

  According to the cap of the present invention, with the overcap closed, the top of the top wall of the overcap is brought into contact with the opening edge of the dispensing cylinder, and the opening edge is sealed. For example, even when the container equipped with is overturned, tilted, or the like, the contents can be prevented from leaking out of the container. In addition, since the top wall of the overcap is thin and elastically deformable, when the internal pressure of the container increases, the top wall is separated from the opening edge of the dispensing cylinder. By reversing the deformation, the internal pressure can be released into the overcap with little resistance. As described above, the internal pressure of the container can be released to the outside of the overcap through the thin-walled part while preventing the contents from leaking out of the container.

  According to the cap of the present invention, the number of parts and the manufacturing process can be reduced, and the internal pressure of the container can be made equal to the external pressure with high accuracy using a simple configuration.

  1 is a side sectional view showing a schematic configuration of a cap according to an embodiment of the present invention, FIG. 2 is a view showing an arrow A in FIG. 1, FIG. 3 is a view showing an arrow B in FIG. It is a figure explaining the pressure release state of the cap concerning one embodiment of the present invention.

As shown in FIG. 1, the cap 1 according to the present embodiment is used by being attached to the mouth of the container 2, and the contents such as liquid food and seasonings contained in the container 2 are used. It is something to be poured out.
The container 2 has a trunk portion that is made of a soft or thin resin material or the like and can be elastically deformed. A male screw (not shown) is formed on the outer peripheral surface of the mouth of the container 2.

  The cap 1 includes a top cylindrical cap body 3 attached to the mouth of the container 2 and an overcap 5 attached to the cap body 3. The cap body 3 and the overcap 5 are each formed in a substantially cylindrical shape and are disposed coaxially with the common shaft. Hereinafter, the common axis is referred to as a cap axis O, and the cap body 3 side is referred to as a lower side and the overcap 5 side is referred to as an upper side along the cap axis O direction.

  The cap body 3 includes a cylindrical portion 31 attached to the mouth portion of the container 2 and a top wall portion 32 in which an extraction hole 32b that opens into the cylindrical portion 31 is formed. A female screw 31 a that is screwed onto the male screw of the container 2 is formed on the inner peripheral surface of the cylindrical portion 31. The upper end surface of the mouth portion of the container 2 and the lower surface of the top wall portion 32 are in contact (contact) with each other by screwing and tightening the female screw 31a to the male screw at the mouth portion of the container 2. .

  Further, at the edge of the extraction hole 32b in the top wall portion 32, an extraction cylinder 32a extending upward from its upper surface is provided upright. The dispensing cylinder 32a is gradually reduced in diameter from the bottom to the top. The extraction hole 32b and the extraction cylinder 32a are disposed coaxially with the cap shaft O. Further, the lower end portion of the dispensing cylinder 32 a is formed in a concave curved surface shape whose diameter is gradually reduced from the lower side toward the upper side, and is smoothly connected to the top wall portion 32.

  Further, an annular recess 33 extending along the circumferential direction is formed on the outer peripheral surface of the upper end portion connected to the top wall portion 32 in the cylindrical portion 31 of the cap body 3.

  The overcap 5 is formed in a top cylinder shape, and covers the extraction hole 32b of the extraction cylinder 32a as shown by a two-dot chain line in FIG. The overcap 5 includes a cylindrical peripheral wall portion 51 and a top wall portion 52 that closes the upper end of the peripheral wall portion 51. The top wall portion 52 is formed in a curved shape that bulges downward, and the top portion of the lower surface abuts on the upper end opening edge of the extraction tube 32a, and is formed thin and elastically deformable. ing. Further, on the inner peripheral surface of the lower end portion (fitting portion) that fits to the outer peripheral surface of the upper end portion of the cap body 3 in the peripheral wall portion 51 of the overcap 5, an annular convex portion 53 that extends along the circumferential direction is formed. The protrusion 53 is detachably fitted to the recess 33 of the cap body 3.

  As shown in FIGS. 2 and 3, the peripheral wall 51 of the overcap 5 is formed with a plurality of thin portions 54 that are formed thinner than others and elastically deformable at intervals in the circumferential direction. Specifically, each thin portion 54 is formed by recessing a part of the outer peripheral surface of the overcap 5, and extends from the upper end to the lower end of the overcap 5 along the cap axis O direction. Among the lower end portions of the peripheral wall portion 51 of No. 5, the portion located in the thin portion 54 is elastically deformable in the radial direction. A part of the convex portion 53 in the circumferential direction is located at the lower end portion of the thin portion 54.

Further, the lower end of the peripheral wall portion 51 of the overcap 5 and the upper end of the cylindrical portion 31 of the cap body 3 are connected to each other via a hinge portion 7 at a part in the circumferential direction. As a result, the overcap 5 rotates around the hinge portion 7 so that the pouring hole 32b of the pouring cylinder 32a in the cap body 3 can be opened and closed.
Moreover, the cap main body 3, the hinge part 7, and the overcap 5 are integrally formed.
On the outer peripheral surface of the overcap 5, an opening / closing operation piece 8 that protrudes radially outward is formed on the opposite side of the cap shaft O with respect to the arrangement position of the hinge portion 7.
Here, the thin-walled portion 54 is separated from the hinge portion 7 and the opening / closing operation piece 8 by an equal distance along the circumferential direction at each portion located between the hinge portion 7 and the opening / closing operation piece 8 in the overcap 5. A pair is arranged. Note that the circumferential lengths of the thin portions 54 are equal to each other, and are, for example, about 25% of the circumferential length of the overcap 5. In the overcap 5, the thickness of the thin portion 54 formed on the peripheral wall portion 51 is equal to the thickness of the top wall portion 52.

Next, the dispensing of contents using the cap 1 configured as described above will be described.
When the contents are poured out, the opening / closing operation piece 8 of the overcap 5 is pushed up to open the overcap 5 to expose the dispensing cylinder 32a to the outside. And it inclines so that the trunk | drum of the container 2 may be hold | gripped and the cap 1 side may be faced below.
When the container 2 is tilted, the contents stored in the container 2 flow into the pouring cylinder 32a through the pouring hole 32b of the cap body 3, and are poured out through the upper end opening of the pouring cylinder 32a. Is issued. Moreover, the amount of content to be poured out can be easily adjusted by squeezing the body portion of the container 2 toward the inside in the radial direction. When the dispensing is completed, the overcap 5 is closed by a procedure reverse to the above-described operation.

  As described above, according to the cap 1 of the present embodiment, at least a part of the lower end portion of the peripheral wall portion 51 of the overcap 5 that is detachably fitted to the outer peripheral surface of the cap body 3 is the thin-walled portion 54. Therefore, when the internal pressure of the container 2 increases due to, for example, a volatile component generated from the contents in the container 2 or an increase in the outside air temperature, the thin-walled portion 54 is expanded radially outward as shown in FIG. The outer cap 5 and the cap body 3 are released from being deformed to release the fitting between the lower end portion of the overcap 5 and the outer peripheral surface of the cap body 3 and the sealing state between the overcap 5 and the cap body 3 is released. This internal pressure can be released to the outside of the overcap 5 through the thin wall portion 54.

  Thus, since the internal pressure of the container 2 becomes equal to the external air pressure through the thin wall portion 54 of the overcap 5, the internal pressure of the container 2 increases and the contents are scattered from the pouring hole 32b to the outside of the container 2 or over. It is prevented that the cap 5 is opened and the dispensing hole 32b is opened.

Furthermore, since the above-mentioned effect is exhibited by forming the thin portion 54 in the overcap 5, it is possible to prevent an increase in the number of parts of the cap 1 and the manufacturing process. That is, as compared with the conventional case, for example, a hole for releasing pressure is formed in the cap body 3 and a valve member for opening and closing the hole is provided to assemble these members. The number of parts and the manufacturing process can be reduced.
Further, if the thin portion 54 is bulged and deformed outward in the radial direction, the above-described effects can be obtained, so that the accuracy of the operating pressure can be easily ensured.

  Further, with the overcap 5 closed, the top of the top wall portion 52 of the overcap 5 is brought into contact with the opening edge of the dispensing cylinder 32a, and the opening edge is sealed. For example, even when the container 2 is rolled over, tilted, etc., the contents can be prevented from leaking out of the container 2 from the dispensing cylinder 32a. Further, since the top wall portion 52 of the overcap 5 is formed to be thin and elastically deformable, when the internal pressure of the container 2 increases, the top wall portion 52 is poured as shown in FIG. By reversing and deforming so as to be separated from the opening edge of the outlet cylinder 32a, this internal pressure can be released into the overcap 5 with little resistance. As described above, it is possible to release the internal pressure of the container 2 to the outside of the overcap 5 through the thin portion 54 while preventing the contents from leaking from the dispensing cylinder 32 a to the outside of the container 2.

  Moreover, since the hinge part 7 which connects the cap main body 3 and the overcap 5 is provided, when the overcap 5 is opened, the overcap 5 is not detached from the cap 1 and can be easily opened and closed. be able to.

The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention.
For example, in the present embodiment, the thin-walled portion 54 is formed such that a part of the outer peripheral surface of the overcap 5 is recessed. However, the present invention is not limited to this. That is, the thin portion 54 may be formed by recessing a part of the inner peripheral surface of the overcap 5, and in this case, a portion of the convex portion 53 of the overcap 5 that is located in the thin portion 54. May protrude larger than the others. The thin portion 54 may be formed by recessing a part of the outer peripheral surface of the overcap 5 and a part of the inner peripheral surface corresponding to the outer peripheral surface.

Moreover, the thin part 54 should just be formed in at least one part of the said lower end part in the surrounding wall part 51 of the overcap 5, and is not limited to this embodiment.
The thin wall portion 54 is formed to extend from the upper end to the lower end of the overcap 5 along the cap axis O direction. However, the present invention is not limited thereto, and the peripheral wall portion 51 of the overcap 5 is not limited thereto. It is good also as forming only in the said lower end part.
Moreover, it can also be set as the structure which does not provide the convex part 53 in the part located in the thin part 54 in the said lower end part of the overcap 5. FIG.
Further, since the overcap 5 only needs to be detachably fitted to the outer peripheral surface of the cap body 3, for example, the inner peripheral surface of the lower end portion of the overcap 5 and the outer periphery of the upper end portion of the cap body 3. Instead of providing the convex portion 53 and the concave portion 33 on the surface, the inner peripheral surface and the outer peripheral surface may be set to have substantially the same radius of curvature and may be formed as a smooth surface along the cap axis O direction.

Further, the top wall portion 32 of the cap body 3 is provided with a pouring cylinder 32a standing upright communicating with the pouring hole 32b. However, the present invention is not limited to this. The cylinder 32a may not be provided.
In the embodiment, the convex portion 53 is formed on the overcap 5 and the concave portion 33 is formed on the cap body 3. On the contrary, the concave portion is formed on the overcap 5 and the concave portion is formed on the cap main body 3. You may form the convex part detachably fitted to.

  Moreover, although the top part of the lower surface of the top wall part 52 in the overcap 5 is in contact (close contact) with the opening edge of the extraction cylinder 32a, the relative positional relationship between the top part and the opening edge is as follows. The top portion and the opening edge may be close to each other, for example, because it can be appropriately adjusted in view of the viscosity of the contents stored in the container 2.

In addition, the overcap 5 is connected to the cap body 3 via the hinge portion 7, but the overcap 5 and the cap body 3 are separated from each other without providing the hinge portion 7. It may be coupled by means such as fitting (undercut).
In addition, the cap body 3 is screwed into the mouth portion of the container 2. However, the cap body 3 is not limited thereto, and the cap body 3 may be fitted and attached to the mouth portion, for example. Good.
Moreover, although the structure formed in the curved surface shape which bulges toward the lower side as the ceiling wall part 52 of the overcap 5 was shown, even if it forms in the flat surface extended along the direction orthogonal to the cap axis | shaft O, it was shown. Good.
Moreover, although the thin-walled elastically deformable configuration is shown as the top wall portion 52 of the overcap 5, it may be formed thicker than the thin-walled portion 54 to be a rigid wall.

  In addition, in the range which does not deviate from the main point of this invention, it is possible to replace suitably the component in above-mentioned embodiment with a well-known component, and you may combine the above-mentioned modification suitably.

It is a sectional side view showing the schematic structure of the cap concerning one embodiment of the present invention. It is a figure which shows the arrow A of FIG. It is a figure which shows the arrow B of FIG. It is a figure explaining the pressure release state of the cap concerning one embodiment of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Cap 2 Container 3 Cap main body 5 Overcap 32 Top wall part of cap main body 32a Outlet cylinder 32b Outlet hole 33 Concave part 51 Perimeter wall part 52 Overcap top wall part 53 Convex part 54 Thin part

Claims (2)

A cap body having a top tube shape, attached to the mouth of a container for storing contents, and having a pouring hole for pouring the contents on the top wall,
An overcap that is detachably fitted to the outer peripheral surface of the cap body and opens and closes the pouring hole,
In the peripheral wall portion of the overcap, at least a part of the fitting portion to be fitted to the outer peripheral surface of the cap main body is formed to be thinner than others and to be a thin-walled portion that can be elastically deformed. cap. The cap according to claim 1,
The top wall portion of the cap body is provided with a pouring cylinder standing upright and communicating with the pouring hole.
The top wall portion of the overcap is formed in a curved shape that bulges toward the dispensing cylinder side, and the top portion thereof is in contact with the opening edge of the dispensing cylinder and is formed thin and elastically deformable. Cap characterized by being said.

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