JP3201111U - Check valve - Google Patents

Abstract

A check valve for a closure for a packaging container having high versatility is provided. In a check valve for a closure for a packaging container, the check valve includes a valve seat portion, a valve body, a communication hole, and a cylindrical wall portion. The hole 5 is formed so as to be continuous with the peripheral portion 4a of the valve seat portion 4, and the valve body 6 is connected to the central portion of the valve seat portion 4 and normally closes the communication hole 5. The cylindrical wall portion 3 is formed so as to be able to fit in the flow path 10A provided in the closing tool. [Selection] Figure 2

Description

  The present invention relates to a check valve, and more particularly to a check valve for a closure such as a cap or a spout for a packaging container.

  2. Description of the Related Art Conventionally, there are packaging containers in which hermeticity is maintained by a closure such as a cap or a spout. In such a packaging container, the inflow of oxygen or the like due to a decrease in the airtightness after opening is inevitable although the airtightness is maintained during distribution. In particular, if the contents are not supposed to be used up, such as seasonings, this is a problem because it affects the taste and quality. Therefore, a closing tool has been developed that provides a check valve to prevent the inflow of oxygen or the like (see, for example, Patent Documents 1 and 2).

JP 2014-5060 A Japanese Patent No. 4039507

  The problem with closures that have such a check valve is that a special structure for providing a check valve is required at the mouth of the packaging container and the closure itself, so that the manufacturing process is not complicated. In addition, it is difficult to apply immediately to the closures that are already in widespread use.

  Then, an object of this invention is to provide the non-return valve for closures for packaging containers with high versatility.

  The present invention is a check valve for a closure of a packaging container, and includes a valve seat portion, a valve body, a communication hole, and a cylindrical wall portion, and the communication hole includes the valve seat portion. The valve body is connected to the central part of the valve seat part and normally closes the communication hole, and the cylindrical wall part is The check valve is characterized in that it is continuous with the periphery of the valve seat portion and is formed so as to be fitted in a flow path provided in the closure.

  In the present invention, the valve seat portion may be provided on the top wall of the check valve. Further, according to the present invention, a fitting projection can be formed on the outer peripheral surface of the cylindrical wall portion. In the present invention, the closure may be a spout, and the inner wall of the flow path may be the inner wall of the spout. In the present invention, the closure may be a cap, and the inner wall of the flow path may be an inner cylinder of the cap.

  In the present invention, since the check valve can be fitted to the inner wall of the flow path provided in the closure of the packaging container separate from the check valve, the manufacturing process of the closure can be simplified. More versatility can be improved.

It is a figure which shows embodiment of this invention, (a) is a top view, (b) is a bottom view, (c) is a perspective view. It is a figure which shows the usage condition of embodiment of this invention, (a) is a figure equivalent to AA sectional drawing of FIG. 1, (b) shows the mode at the time of the extraction of the content (a). It is a figure corresponded to the principal part enlarged view of. It is a figure which shows another usage condition of embodiment of this invention, and is a figure equivalent to the AA sectional drawing of FIG.

  An embodiment of the present invention will be described with reference to FIGS. First, the configuration of the present embodiment will be described. The check valve 1 includes a top wall 2 and a cylindrical wall portion 3 that hangs down from an outer edge portion 2 a of the top wall 2. The check valve 1 is used by being attached to a closure for a packaging container (for example, spout S or cap C). The ceiling wall 2 has a valve seat portion 4 recessed in a substantially circular shape in plan view so as to leave the outer edge portion 2a, and has a communication hole 5.

  The connection hole 5 is a hole formed so as to be continuous with the peripheral edge portion 4a of the valve seat portion 4 so as to communicate between the inside and the outside of the packaging container. In the present embodiment, the connection hole 5 is formed in a total of four locations. . Further, the valve seat portion 4 is connected to the central portion 4b by welding, and serves as a valve seat.

  The valve body 6 has a substantially circular film shape or sheet shape, and is formed of, for example, silicone rubber. Further, the valve body 6 is a free end except for the central portion welded to the valve seat portion 4 so that the communication hole 5 is closed at all times (when not being poured out) so that the inside and outside of the packaging container do not communicate. Is provided. Further, when the packaging container is gripped for pouring out the contents, the valve body 6 is pushed up by the increase in its internal pressure or the contents in the communication hole 5 to open the communication hole 5 and It communicates with the inside and outside of the container.

  The cylindrical wall portion 3 is formed in a substantially cylindrical shape so that it can be fitted into a flow path for pouring the contents provided in the closures C and S, and if necessary, on the outer surface thereof in the circumferential direction. A fitting protrusion (not shown) is formed extending in the direction.

  Next, the mode at the time of use of this embodiment is demonstrated. FIG. 2 is an example in which the check valve 1 is attached to the spout S. The spout S has a hole-shaped flow path 10A formed so as to penetrate the center thereof, and the check valve 1 is attached to the flow path 10A, for example, the inner wall 11 by fitting.

  FIG. 3 is an example in which the check valve 1 is attached to the cap C (note that FIG. 3 is an example of a hinge cap, but naturally it can also be attached to other caps such as a screw cap). The cap C is provided with an inner cylinder 13 for forming a groove 12 for fitting the mouth of the packaging container, and a flow path 10B is provided from the inner cylinder 13 to the dispensing cylinder 14. The check valve 1 is fitted into the inner cylinder 13 and attached to the cap C, for example. By doing so, the check valve 1 can be retained in the flow path 10B by utilizing the fact that the inner cylinder 13 is deformed inward when the mouth portion of the packaging container is fitted into the groove portion 12. It becomes possible.

  Taking the case where the check valve 1 is attached to the spout S as an example, the state of the check valve 1 when pouring the contents will be described. The user tilts the packaging container in order to pour the contents, When the container is gripped, the contents move into the communication hole 5 as indicated by an arrow A. The valve body 6 is pushed up by the contents or the internal pressure generated by the gripping, the blockage of the communication hole 5 by the valve body 6 is released, the inside and outside of the packaging container are communicated, and the contents as shown by the arrow A Will be poured out.

  Thereafter, when the user returns the inclination of the container to the original position, the valve body 6 also returns to the original state, and the communication hole 5 is closed again. When the contents are liquid, some contents remain in the valve seat portion 4, but in the present embodiment, the remaining contents slightly remain between the valve seat portion 4 and the valve body 6. In this way, it returns to the inside of the packaging container through the communication hole 5 (suck back). By slightly leaving the contents between the valve seat part 4 and the valve body 6, surface tension acts between the valve seat part 4 and the valve body 6, and the communication hole 5 can be closed with a stronger force. I can do it.

  Although this invention was demonstrated based on the said embodiment, this invention is not limited to the said embodiment, The range which does not change the summary of invention can be changed suitably. For example, the connection method of the valve body 6 to the valve seat portion 4 is not necessarily welding, and may be adhesion, fitting, insert molding, or other methods.

DESCRIPTION OF SYMBOLS 1 Check valve 2 Top wall 2a Outer edge part 3 Tube wall part 4 Valve seat part 4a Peripheral part 4b Center part 5 Communication hole 6 Valve body 10 Flow path 11 Inner wall 12 Groove part 13 Inner cylinder 14 Outflow cylinder C Cap S Spout

Claims (5)

A check valve for a closure of a packaging container,
A valve seat portion, a valve body, a communication hole, and a cylindrical wall portion;
The communication hole is formed to be continuous with the peripheral edge of the valve seat portion,
The valve body is connected to the central portion of the valve seat portion and normally closes the communication hole.
The non-return valve, wherein the cylindrical wall portion is formed so as to be fitted in a flow path provided in the closing tool.   The check valve according to claim 1, wherein the valve seat portion is provided on a top wall of the check valve.   The check valve according to claim 1 or 2, wherein a projection for fitting is formed on an outer peripheral surface of the cylindrical wall portion.   The check valve according to claim 1, wherein the closing tool is a spout, and an inner wall of the flow path is an inner wall of the spout.   The check valve according to claim 1, wherein the closing tool is a cap, and an inner wall of the flow path is an inner cylinder of the cap.

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