Patent Application
20200071041
This invention relates to a composite container lid comprising an inner plug with a flow-out port fitted and secured to a container mouth portion and an upper lid detachably attached to the container mouth portion to cover the inner plug.
As a cap to be attached to a container in the form of a bottle, there has heretofore been known a composite container lid comprising an outer lid (upper lid) and an inner plug with a flow-out port.
A patent document 1, for example, is disclosing a composite container lid comprising an inner lid (inner plug) fitted and secured to a container mouth portion and an outer lid that is screw-attached to the container mouth portion so as to cover the inner lid. In this composite container lid, the inner lid has a cylindrical portion of a size that just fits into the container mouth portion. At the upper end of the cylindrical portion, there is provided a horizontal flange wall that comes into close contact with the upper end surface of the container mouth portion. A funnel-like portion (flow-out guide cylinder) that expands upwards is formed on the upper surface of the horizontal flange wall. Further, a flow-out port is formed in the bottom portion of the cylindrical portion for flowing out the content solution, and a pole-like protrusion is rising from the central portion of the bottom portion. Moreover, an annular protrusion is provided on the inner surface of the top plate of the outer lid of the composite container lid. The inner lid is held by the outer lid as the upper end of the pole-like protrusion is fitted into the annular protrusion.
The composite container lid is put to cover the container mouth portion in a state where the inner lid (inner plug) is held by the outer lid (upper lid), and is fitted to the container mouth portion as the outer lid is closed. At the time of use, the outer lid is opened and is removed from the container mouth portion leaving, however, the inner lid on the container mouth portion. Upon tilting the container, the liquid in the container flows out through the flow-out port formed in the inner lid and the funnel-like portion (flow-out guide cylinder). When the liquid content is flown out by attaching the composite container lid to the container (bottle), there is obtained such an advantage that the liquid can be effectively prevented from dripping.
After the liquid content is flown out by a predetermined amount, the outer lid in the composite container lid can be attached again to the container mouth portion to which the inner lid has been attached; i.e., the container mouth portion can be resealed.
When the container mouth portion is resealed with the outer lid as described, however, there often occurred a problem of defective closing.
The present inventors have forwarded the study concerning the defective closing. As a result, the inventors have discovered that a sound is generated at the time of resealing leading to the cause of defective closing.
That is, at the time of resealing in a state where the inner lid has been fitted and secured to the container mouth portion, when the outer lid that is put on the container mouth portion is descended by being turned in the closing direction, the upper end of the pole-like protrusion of the inner lid enters again into the annular protrusion provided on the inner surface of the top plate of the outer lid. In this state, as the outer lid is, further, turned in the closing direction and descends, then the undercut formed in the inner surface of the lower end of the annular protrusion moves over the upper end (swollen portion) of the pole-like protrusion. At this moment, the force of engagement of the undercut is released at one time and causes the outer lid to descend abruptly due to the reaction thereof. As a result, abrupt collision (e.g., between the screws of the outer lid and the inner lid) or slide takes place at various portions and generates the sound.
Namely, the outer lid is resealed by a general consumer. Therefore, if the sound is generated as above, then the consumer would erroneously take it that the outer lid is now completely resealed despite the outer lid would still have to be turned in the closing direction so as to be completely closed. As a result, there occurs such an inconvenience that the container is stored without the outer lid being closed to a sufficient degree.
Patent document 1: Japanese UM-A-51-75759
It is, therefore, an object of the present invention to provide a composite container lid comprising an inner plug with a flow-out port fitted and secured to a container mouth portion and an upper lid detachably attached to the container mouth portion so as to cover the inner plug, wherein the composite container lid is so designed as to effectively prevent the defective closing when the upper lid is to be resealed or, in other words, to effectively suppress the production of sound when the upper lid is to be resealed.
According to the present invention, there is provided a composite container lid comprising an inner plug with a flow-out port fitted and secured to a container mouth portion and an upper lid detachably attached to the container mouth portion so as to cover the inner plug, wherein:
the inner plug includes a hollow upper lid engaging cylinder with its upper end closed, a container mouth portion-securing member having a circumferential wall that surrounds the upper lid engaging cylinder, and linking pieces that link the inner surface of the circumferential wall to the upper lid engaging cylinder so as to form a flow-out port;
the upper lid engaging cylinder is provided, at an upper end on the outer surface thereof, with a circumferential protuberance for temporary engagement with the upper lid;
the upper lid includes a top plate and a skirt portion that stretches downward from the outer circumferential edge of the top plate and has, on the inner surface thereof, a screw thread for screw-engagement with the container mouth portion;
the top plate has engaging pieces formed on the inner surface thereof, the engaging pieces having an undercut for temporarily engaging with the circumferential protuberance that temporarily engages with the upper lid engaging cylinder; and
a sound-suppressing protrusion is provided on the inner surface of the top plate in a region surrounded by the engaging pieces or on the upper end surface of the upper lid engaging cylinder.
In the composite container lid of the present invention, the following embodiments can be favorably employed.
In the composite container lid of the invention, an important feature resides in the provision of the sound-suppressing protrusion on the inner surface of the top plate of the upper lid in a region surrounded by the engaging pieces or on the upper end surface of the upper lid engaging cylinder.
The sound-suppressing protrusion is for shortening the distance between the upper end surface of the upper lid engaging cylinder and the inner surface of the top plate of the upper lid, and works to suppress the generation of sound. That is, let it be presumed a case where the upper lid was once opened and it is now attempted to seal the container mouth portion again with the upper lid that was removed therefrom. In this case, the upper lid is put on the container mouth portion to which the inner plug has been fitted and secured. The upper lid is then turned in the closing direction. Here, first, the upper end of the upper lid engaging cylinder of the inner plug enters into the region surrounded by the engaging pieces formed on the inner surface of the top plate of the upper lid. Thereafter, as the upper lid is further turned in the closing direction so as to be descended, then the upper end of the upper lid engaging cylinder moves over the undercut of the engaging pieces. In the conventional composite container lid, at this moment, the engaging force (resistance against being closed) due to the undercut is released. Due to the reaction thereof, therefore, the upper lid descends abruptly permitting the screw thread of the upper lid to come into contact with the screw thread of the container mouth portion at one time generating, therefore, the sound. According to the present invention, however, the sound-suppressing protrusion effectively suppresses the generation of sound.
Namely, in the present invention, the distance between the upper end surface of the upper lid engaging cylinder and the inner surface of the top plate of the upper lid is adjusted by the sound-suppressing protrusion to be short. Therefore, when the upper end of the upper lid engaging cylinder moves over the undercut of the engaging pieces, the sound-suppressing protrusion readily restricts the upper end surface of the upper lid engaging cylinder. Besides, even when the engaging force (pushing force) of the undercut is released, a resisting force generates against closing the container mouth portion. As a result, even when the engaging force due to the undercut is released, the upper lid is suppressed from abruptly descending, and the screw threads are prevented from coming into quick contact with each other effectively suppressing the generation of sound.
As described above, the present invention effectively suppresses the generation of sound when it is attempted to reseal the upper lid. Accordingly, the general consumers are allowed to reliably reseal the upper lid up to the completely closed position eliminating such an inconvenience that the consumers may discontinue the closing attempt due to the generation of sound and, therefore, that the container is stored with its upper lid imperfectly closed.
Reference is now made to
The container mouth portion 80 is forming, in the outer surface thereof, a recessed portion 81 for holding the inner plug 1 at an upper part thereof, and is, further, forming a screw 83 for screw-fixing the upper lid 3 at a portion under the recessed portion 81.
The composite container lid is attached to the container mouth portion 80 in a state where the inner plug 1 is held by the upper lid 3 by putting the upper lid 3 on the mouth portion 80 of the container that is containing a liquid content to close the mouth portion (i.e., by turning the upper lid 3 in a closing direction).
The inner plug 1 is constituted by a hollow upper lid engaging cylinder 5 and with its upper end closed, and a container mouth portion-fixing member 7. That is, the upper lid engaging cylinder 5 is a member that engages with the upper lid 3 to hold it while the container mouth portion-fixing member 7 is a member that works to bring the inner plug 1 into firm and close contact with the container mouth portion 80 to fix it thereto.
The upper lid engaging cylinder 5 is a member that temporarily engages with engaging pieces 37 (described later) formed on the inner surface of the upper lid 3, and is forming, at the upper end thereof, a circumferential protuberance 5a for temporary engagement in a shape that is swollen outward. As shown in
How to engage with the upper lid 3 to hold it will be described later.
The container mouth portion-fixing member 7 includes a circumferential wall 9 that is so provided as to surround the upper lid engaging cylinders. The circumferential wall 9 forms, on the outer surface thereof, a swollen portion 9a that slightly swells outward (see
As will be understood from
The container mouth portion-fixing member 7, further, has a low annular outer wall 15 in addition to the above circumferential wall 9, the upper inner surface of the annular outer wall 15 being continuous to the upper outer surface of the circumferential wall 9 via a horizontal wall 17.
As will be understood from
A rattling-prevention piece 19 is provided on the outer surface at the lower end of the annular outer wall 15. Therefore, the inner plug 1 held in the upper lid 3 prior to being attached to the container mouth portion 80, is allowed to be held therein maintaining stability without rattling in the upper lid 3. This prevents the inner plug from falling down prior to being attached to the container mouth portion 80, and is also effective in attaining alignment with respect to the container mouth portion 80. The rattling-prevention piece 19 is simply for preventing the rattling and, therefore, may be formed in a small thickness so as to easily deflect.
In this embodiment as shown in
Here, the flow-out guide cylinder 21 does not have to be directly stretched from the upper end of the circumferential wall 9, but may be erected on the upper surface of the horizontal wall 17 maintaining a gap from the upper end of the circumferential wall 9.
In the inner plug 1 described above, the annular outer wall 15 may be omitted, and the container mouth portion-fixing member 7 may be constituted by the circumferential wall 9 and the horizontal wall 17 only. In order for the inner plug 1 to be firmly fitted and fixed to the container mouth portion 80, however, it is desired to provide the above-mentioned annular outer wall 15.
Referring to
By utilizing the engagement of the screw thread 35 with the screw 83, the thus formed upper lid 3 is detachably attached to the container mouth portion 80 so as to cover the inner plug 1 fitted and fixed to the container mouth portion 80.
On the inner surface of the top plate 31 of the upper lid 3, there are provided a plurality of (three in the diagramed embodiment) separate engaging pieces 37 stretching downward from the central portion thereof. The engaging pieces 37 are for holding the inner plug 1 in the upper lid 3. Namely, the plurality of engaging pieces 37 are circumferentially arranged, and the upper portion of the upper lid engaging cylinder 5 is inserted in a region surrounded by the engaging pieces 37. Besides, at the lower end of each engaging piece 37, there is formed an undercut 37a that is capable of engaging with the circumferential protuberance 5a for temporary engagement formed at the upper end of the upper lid engaging cylinder 5. As the circumferential protuberance 5a and the undercut 37a engage with each other, the inner plug 1 is stably held so will not to be removed from the upper lid 3.
It is in principle possible to hold the inner plug 1 in the upper lid 3 by inserting the upper part of the upper lid engaging cylinder 5 in space in a ring by using an engaging piece of a ring shape instead of using the plurality of engaging pieces 37 lacking, however, the practicability. This is because the engaging piece of the ring shape easily undergoes the deflection, and it becomes difficult to insert the upper lid engaging cylinder 5 in the space in the ring. Further, if the inner diameter of the ring is increased to facilitate the insertion of the upper lid engaging cylinder 5, then it becomes difficult to stably hold the upper lid engaging cylinder 5 that is inserted.
Therefore, the number of the engaging pieces 37 and the size (diameter) of the region surrounded by the engaging pieces 37 should be determined depending on the size of the upper end of the upper lid engaging cylinder 5 such that the upper lid engaging cylinder 5 is allowed to enter as the engaging pieces 37 are deflected and that the undercut 37a and the circumferential protuberance 5a work together to stably hold the upper lid engaging cylinder 5 so will not to escape.
On the inner surface of the top plate 31 of the upper lid 3, further, a cylindrical seal ring 39 is provided on the outer side of the engaging piece 37. As shown in
On the inner surface of the top plate 31, furthermore, an over-wrap-seam prevention protrusion 41 is formed along the circumference thereof on the outer side of the seal ring 39. The protrusion 41 is a member that comes into contact with the upper surface of the horizontal wall 17 of the inner plug 1 when the upper lid 3 is in its closing motion; i.e., the protrusion 41 blocks excess of closing motion (wrap-seaming) to let the consumer know that the mouth portion has been completely closed.
By using the above-mentioned composite container lid, the upper part of the upper lid engaging cylinder 5 of the inner plug 1 is pushed into the region surrounded by the engaging pieces 37 of the upper lid 3, and the inner plug 1 is held by the upper lid 3. In this state, the upper lid 3 is put on the mouth portion 80 of the container filled with the content solution; i.e., the composite container lid is attached to the container mouth portion 80.
That is, due to the engagement (temporary engagement) of the undercut 37a of the engaging pieces 37 with the circumferential protuberance 5a at the upper end of the upper lid engaging cylinder 5, the inner plug 1 is not removed from the upper lid 3 enabling the closing operation to be quickly carried out. As the upper lid 3 descends accompanying the closing operation, the upper part of the container mouth portion 80 is fitted to between the circumferential wall 9 of the inner plug 1 and the annular outer wall 15, whereby the outer surface (swollen portion 9a) of the circumferential wall 9 comes into close contact with the inner surface of the container mouth portion, and the lower surface of the horizontal wall 17 of the inner plug 1 comes into close contact with the upper end surface 80a of the container mouth portion 80. In this state where the sealing property is maintained, the inner plug 1 is firmly fixed to the container mouth portion 80.
In the above-mentioned composite container lid of the present invention, a sound-suppressing protrusion 50 is provided on the inner surface of the top plate 31 of the upper lid 3. This effectively suppresses the generation of sound when the upper lid 3 removed from the container mouth portion 80 is to be resealed. Namely, this effectively prevents such an occurrence that a consumer might misunderstand the generation of sound as the completion of the closing operation (i.e., prevents defective closing).
To flow out the liquid content from the container, a general consumer would remove the upper lid 3 from the container mouth portion 80 by turning the upper lid 3 in the opening direction in a state where the composite container lid has been attached to the container mouth portion 80 as shown in
Reference is now made to
In
In this state, as the upper lid 3 is further turned in the closing direction, the undercut 37a rides on the circumferential protuberance 5a of the upper lid engaging cylinder 5, and the pushing force acts on the upper lid engaging cylinder 5 (hereinafter often referred to simply as cylinder 5) due to the upper lid 3 that is descending (see
As the upper lid 3 is further turned in the closing direction, the cylinder 5 is gradually pushed down accompanying the upper lid 3 (engaging pieces 37) that descends, and the undercut 37a of the engaging pieces 37 moves over the circumferential protuberance 5a of the cylinder 5 (see FIG.
4(c)). This is because the linking pieces 11 linking the cylinder 5 to the circumferential wall 9 undergo the deflection and become tilted outward from the lower end of the cylinder 5 and, besides, the cylinder 5 is hollow and easily undergoes the deflection.
In this state, the over-wrap-seaming prevention protrusion 41 remains separated away from the upper surface of the horizontal wall 17 and, besides, a gap still exists between the seal ring 39 and the inner surface of the flow-out guide cylinder 21. It will, therefore, be understood that the closing operation has not yet been completed. Here, however, the sound-suppressing protrusion 50 provided on the upper lid 3 is in a state of being contacted to the upper end surface of the upper lid engaging cylinder 5 making it, therefore, possible to effectively suppress the generation of sound when the undercut 37a of the engaging pieces 37 has moved over the circumferential protuberance 5a of the cylinder 5.
As the sound is generated, a general consumer would erroneously take it that the closing operation has been completed and may discontinue the closing operation. At this moment as described above, however, the closing operation has not been completed yet and there may occur a problem of defective closing.
Referring to
No sound is now generated at the moment when the undercut 37a of the engaging pieces 37 moves over the circumferential protuberance 5a of the cylinder 5. Therefore, the consumer would continue to turn the upper lid 3 in the closing direction to fulfil the closing. As shown in
In the invention described above, it is in theory possible to suppress the generation of sound without providing the sound-suppressing protrusion 50 but permitting the inner surface of the top plate 31 to come into contact with the upper end surface of the cylinder 5 when the undercut 37a has moved over the circumferential protuberance 5a. In fact, however, it is quite difficult to so design that the gap becomes zero at the time of temporary engagement. Besides, permitting the inner surface of the top plate 31 to come into direct contact with the upper end surface of the cylinder 5 causes a great increase in the resisting force against the closing operation; i.e., it becomes difficult to close the container mouth portion. Therefore, it is not allowable to employ the means that brings the inner surface of the top plate 31 into direct contact with the upper end surface of the cylinder 5.
In the embodiment described above, the sound-suppressing protrusion 50 is in contact with the upper end surface of the cylinder 5 when the undercut 37a has moved over the circumferential protuberance 5a. Generation of sound, however, can be suppressed to a considerable degree if rise of the cylinder 5 is limited to a certain degree despite of the reaction caused by the release of engagement. Therefore, the present invention is not limited to only the embodiment in which the sound-suppressing protrusion 50 is in contact with the upper end surface of the cylinder 5 but may also be so modified that a small gap is maintained between them.
The sound-suppressing protrusion 50 is a member that adjusts the gap to the upper end surface of the cylinder 5 and restricts the rise of the cylinder 5 caused by the reaction. In the embodiment of the drawings, therefore, the sound-suppressing protrusion 50 is an annular protrusion of the shape of a ring. As far as the resisting force against the closing operation is not excessively increased by the contact of the cylinder 5, therefore, the sound-suppressing protrusion 50 is not limited to the above-mentioned shape only, but may assume a solid form or may assume the form of a plurality of fine projections.
Furthermore, it is also allowable to form the sound-suppressing protrusion 50 on the upper end surface of the upper lid engaging cylinder 5 instead of forming it on the inner surface of the top plate 31.
In the invention, further, in order to further improve the effect for suppressing the generation of sound, it is desired not to provide any protuberance that engages with the rattle-prevention piece 19 on the inner surface of the skirt portion 33 of the upper lid 3 to which the outer circumferential edge of the rattle-prevention piece 19 faces. Specifically, it is desired not to provide any protuberance that engages with the rattle-prevention piece 19 on the surface to which the rattle-prevention piece 19 faces until the engagement is released between the upper lid engaging cylinder 5 and the engaging pieces 37. This is because any protuberance formed on this portion may generate sound as the rattle-prevention piece 19 comes in contact therewith or is released therefrom.
According to the present invention, generation of sound is effectively suppressed at the time when the upper lid 3 is to be resealed making it possible to effectively prevent defective sealing caused by an incomplete closing.
1: inner plug
3: upper lid
5: upper lid engaging cylinder
7: container mouth portion-securing member
9: circumferential wall
11: linking pieces
13: flow-out port
15: annular outer wall
17: horizontal wall
19: rattle-prevention piece
21: flow-out guide cylinder
31: top plate
33: skirt portion
35: screw thread
37: engaging pieces
39: seal ring
41: over-wrap-seaming prevention protrusion
50: sound-suppressing protrusion
80: container mouth portion
| Number | Date | Country | Kind |
|---|---|---|---|
| 2017-049860 | Mar 2017 | JP | national |
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/JP2018/008002 | 3/2/2018 | WO | 00 |
