JP4349671B2 - Easy-opening inner stopper and container lid with inner stopper - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an easily-openable inner plug, and more specifically, it is possible to sterilize or sterilize almost the entire surface of the inner plug during hot filling, and to open it with a finger while preventing liquid splashing. The present invention relates to an easily-openable middle plug that can be easily operated. The present invention further relates to a container lid with an inner stopper provided with the inner stopper.
[0002]
[Prior art]
In bottled products, caps with an inner stopper are widely used for the purpose of improving the sealing performance during distribution. Among these caps with an inner plug, there are also known ones in which a gripping member is provided on the inner side of the inner plug in order to improve the openability.
[0003]
Japanese Utility Model Laid-Open No. 51-122855 discloses a synthetic resin plug body 1 in which a circumferential flange portion 3 is integrally stretched over an opening upper end of a bottomed hollow cylindrical portion 2 and an upper opening end of the hollow cylindrical portion 2. Alternatively, an inner plug in which an annular body 4 that fits in the hollow cylindrical portion 2 from the vicinity thereof is integrally provided with the hollow cylindrical portion 2 via a connecting piece 5 is described.
[0004]
Conventionally, an open / close lid for a liquid container that can be opened and closed with one touch is already known. For example, Japanese Patent Application Laid-Open No. 9-30554 discloses a sealing sheet, a first cylinder, and a second cylinder. And a cap, the first cylinder is formed so as to be screwable to the mouth of the container, and the second cylinder can be slid in the open state and the closed state on the neck of the first cylinder A region is formed, and a button-type land portion and a liquid spout around the land portion are provided at the head of the first cylindrical body.
[0005]
[Problems to be solved by the invention]
However, in the case of a container lid in which the heat seal lid is provided separately from the cap, the sealing performance during distribution is maintained fairly well, but the heat seal operation is necessary prior to the cap capping operation. The number of processes is large, and the apparatus cost is still not satisfactory.
[0006]
On the other hand, a cap with an inner plug has the advantage that by selecting the structure and combination of the inner plug and the cap, the plugging operation can be performed at the same time, that is, the inner plug can be set in the cap and can be plugged. However, in the conventional cap with a stopper, the sealing engagement is performed between the inner peripheral surface of the container opening and the outer peripheral surface of the side wall of the inner stopper, and it is not always easy to open the stopper. There is still a problem that sterilization or sterilization of the engaging portion or its vicinity tends to be insufficient.
[0007]
That is, in a packaging container in which the cap is closed, the container and the cap are sterilized by hot filling the container with contents such as beverages and sealing with the cap. This is done by bringing the container and the inner surface of the cap into contact with each other. In the case of conventional inner stoppers, it is difficult for high-temperature liquid to pass through the contact area between the inner peripheral surface of the container mouth and the outer peripheral surface of the inner wall of the inner stopper. There is a problem of remaining in the state of.
[0008]
An object of the present invention is to provide an inner plug capable of effectively sterilizing or sterilizing almost the entire area of the inner plug by hot filling of the contents and sideways after sealing.
Another object of the present invention is to provide an inner plug in which the opening operation of the inner plug proceeds easily and smoothly and a seal break is performed at the initial stage of the opening operation.
Still another object of the present invention is to seal the inner stopper together with the container lid at the same time as the container mouth, and when opening the inner stopper, remove only the cap prior to that. An object of the present invention is to provide a container lid with an inner stopper that can be used.
[0009]
[Means for Solving the Problems]
According to the present invention, the top surface of the container mouthAnd inner circumference sideA flange portion hermetically engaged with the corner portion, a side wall portion engaged with the inner peripheral surface of the container mouth portion, and a closed bottom surface portion were provided.Easy openingIn the inside plug,A corner portion that is hermetically engaged with the inner peripheral side corner portion of the container mouth portion is formed at the base of the flange portion,A large number of ribs and recesses extending alternately in the height direction of the side wall portion are alternately arranged on the outer periphery of the side wall portion, and on the common plane parallel to the flange surface and on the common circumference between the rib portions. Protrusions located atThe diameter of the circumference is defined so that each of the protrusions engages with the inner peripheral surface of the container mouth, and each of the recesses is spaced radially inward from the inner peripheral surface of the container mouth. The radial dimension of each of the recesses is defined, and the side wall portion or the closed bottom surface portion is provided with a stopper for opening.An easily-openable inner plug is provided. In the inner plug of the present invention,It is preferable that the number of grooves is 6 to 24.
[0010]
According to the present invention, a synthetic resin lid that is detachably attached to the container mouth by screw fastening, and a synthetic resin made between the lid and the upper end of the container mouth.Easy openingThe lid is provided with a valve mechanism that can be opened and closed.Easy openingIn the container lid with a stopper,
SaidEasy openingThe inner plug is the top of the container mouthAnd inner circumference sideA flange portion hermetically engaged with the corner portion, a side wall portion engaged with the inner peripheral surface of the container mouth portion, and a closed bottom surface portion,A thin peripheral portion is provided on the outer periphery of the flange portion, and a corner portion that is hermetically engaged with the inner peripheral side corner portion of the container mouth portion is formed at the base of the flange portion,A large number of ribs and recesses extending alternately in the height direction of the side wall portion are alternately arranged on the outer periphery of the side wall portion, and on the common plane parallel to the flange surface and on the common circumference between the rib portions. Protrusions located atThe diameter of the circumference is defined so that each of the protrusions engages with the inner peripheral surface of the container mouth, and each of the recesses is spaced radially inward from the inner peripheral surface of the container mouth. , The radial dimension of each of the recesses is defined, the side wall portion or the closed bottom portion is provided with an opening gripping portion,
The lid includes a top plate portion provided with a horizontal flange portion and a skirt portion suspended from the horizontal flange portion, and an inner surface of the skirt portion includes a thread and a screw formed on an outer surface of the container mouth portion. A screw for engaging the inner plug is formed at a position above the screw and at a small interval from the horizontal flange portion.
In the state before the stoppering, the easily openable inner stopper is locked to the lid body by engaging the thin peripheral edge portion with the projection for locking the inner plug of the lid body. Each of the protrusions formed on the rib portions of the side wall portions engages with the inner peripheral surface of the container mouth portion to reduce the outer diameter, thereby reducing the outer diameter of the thin peripheral edge portion. The inner diameter of the inner stopper locking projection, the outer diameter of the thin peripheral edge, and the inner peripheral surface of the container mouth so that the peripheral edge is not engaged with the inner stopper locking protrusion or the degree of engagement is weak. The outer diameter of each of the protrusions is defined,
An easily-openable container cap with an inner stopper is provided.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
The inner plug of the present invention includes a flange portion sealingly engaged with the top surface or top surface of the container mouth portion or a corner portion thereof, a side wall portion engaged with the inner peripheral surface of the container mouth portion, and a closed bottom surface portion. Or, further provided with an opening gripping portion provided on the side wall or the bottom surface portion, on the outer periphery of the side wall portion, a large number of rib portions and concave portions extending in the height direction of the side wall portion are alternately arranged, In addition, it is characterized in that a protruding portion located on a common plane parallel to the flange surface and on a common circumference is formed between the rib portions.
[0012]
In the inner stopper of the present invention, the sealing and holding with the container mouth portion is performed exclusively by the flange portion of the inner stopper that engages with the top surface or the top surface or the corner portion of the container mouth portion, The locking is performed by a projection provided on the rib portion of the side wall, and the sealing and holding of the container by the inner plug and the locking of the inner plug to the container are performed in a functionally separated manner.
Thus, by separating both functions, as will be described later, the side wall portion of the inner plug is effectively sterilized or sterilized, and a seal break is given priority at the beginning of the opening, and then the opening (unplugging) ) Can be performed.
[0013]
That is, the side wall of the inner plug is mechanically locked to the container mouth, but in order not to be sealed, a rib and a recess extending in the height direction of the side wall are provided on the outer periphery of the side wall. Alternately formed. The protrusion provided on the rib portion engages with the inner peripheral surface of the container mouth portion, but the concave portion is spaced from the inner peripheral surface of the container mouth portion in the radial inner direction, and serves as a passage through which gas and liquid can freely pass.
[0014]
For this reason, after filling the contents hot and sealing the inner plug, when this package is laid down, hot liquid spreads through almost all the inside of the inner plug through the concave portion of the inner plug side wall, There is a significant advantage that sterilization is effectively performed and the storage stability of the contents is improved.
[0015]
On the other hand, the inner stopper flange and the top or top surface of the container mouth or its corner are sealed and held in the vertical direction or further in the horizontal direction. A seal break is made through the gap between the bottom surface of the inner stopper flange and the top surface of the container mouth or its corner, and the recess on the side wall, and then the engagement between the inner peripheral surface of the container mouth and the protrusion of the rib is released. As a result, the plug is opened, and the occurrence of liquid splash can be prevented by providing a sufficient time lag between the seal break and the plug.
[0016]
Moreover, since the protrusion part engaged with the inner peripheral surface of a container mouth part was formed in the rib arrange | positioned intermittently through the recessed part on the outer periphery of the side wall part, adjustment of locking force becomes easy, and this locking force is Although the inner stopper is securely locked to the container mouth portion, the inner stopper can be adjusted to a range in which the inner stopper can be easily pulled out by a finger.
[0017]
In the inner plug of the present invention, it is particularly preferable to form a corner portion sealingly engaged with the inner peripheral side corner portion of the container mouth portion at the base of the flange portion. In this configuration, the corner portions are engaged not only in the vertical direction but also in the horizontal direction. Therefore, when the lower surface of the inner plug flange portion and the top surface of the container mouth portion are simply engaged in the vertical direction. In comparison, the sealed holding can be further ensured. This method is particularly effective for the inner plug of the present invention that cannot be hermetically sealed at the side wall.
[0022]
In addition, the number of ribs (and hence the number of recesses) in the side wall of the inner plug is 6 to 24 to ensure the locking of the inner plug and to ensure a seal break at the initial stage of opening and the contents. It is preferable in order to surely sterilize or sterilize the inner plug by hot filling of the object.
[0023]
The inner plug of the present invention can be used for sealing the container mouth portion in combination with many synthetic resin lids, but is a synthetic resin lid body that is detachably attached to the container mouth portion by screw fastening. It is desirable to use it in combination with a lid so that the flange portion of the inner plug is sandwiched between the lid and the top surface of the container mouth.
In this combination with the lid body, the screw fastening between the lid body and the container mouth portion ensures that the bottom surface of the inner plug flange portion and the top surface of the container mouth portion are securely sealed. After releasing the screw fastening, the inner plug is opened.
Of course, in this case, by loosening the fastening of the lid body, the sealing engagement between the inner plug flange portion and the container mouth portion can be released and a seal break can be performed. Even when the lid is loosened, it is preferable that the sealing engagement by the inner plug is maintained.
In the hot filling, the inside of the container is generally in a vacuum state, but after the fastening of the lid body is loosened using this vacuum, the container may be sealed and held by the inner plug. Further, when the inner plug is opened, once the sealing break is performed, the subsequent opening force is small.
[0024]
In the easily-openable container lid with an inner stopper of the present invention, the inner stopper is an inner stopper having a thin peripheral portion on the outer periphery of the flange portion, while the lid body has a top plate portion provided with a horizontal flange portion and the horizontal plate portion. A skirt portion hanging from the flange portion, and an inner surface of the skirt portion is formed with a thread that engages with a thread formed on the outer surface of the container mouth, and is above the thread Moreover, it is preferable that a projection for locking the inner plug is formed at a position spaced apart from the horizontal flange portion.
[0025]
When the combination of the inner stopper and the lid is used, the inner stopper thin peripheral edge engages with the inner stopper locking projection, and the inner stopper is accommodated in the lid body in one step. At the same time, it is possible to fasten and seal, and when removing the lid body, the engagement between the thin peripheral portion of the inner plug and the protrusion for locking the inner plug is released, leaving the inner plug at the container mouth. be able to.
[0026]
【Example】
The invention will be further described with reference to the following examples.
In the accompanying drawings,
FIG. 1 is a top view of an example of the inner plug of the present invention,
2 is a side view of the inner plug of FIG.
3 is a bottom view of the inner plug of FIG.
4 is a side sectional view of the inner plug of FIG.
FIG. 5 is a partial cross-sectional side view showing a preferred example of a container lid with an inner stopper according to the present invention,
FIG. 6 is a partial cross-sectional side view showing a preferred example of a container lid with a stopper according to the present invention together with a container mouth part,
FIG. 7 is an enlarged cross-sectional view of the main part of FIG.
FIG. 8 is a top view showing the container lid of FIG. 5 with the valve member removed,
9 is a partial cross-sectional side view of the container lid of FIG.
10 is a side sectional view of the container lid of FIG.
FIG. 11 is a bottom view of the container lid of FIG.
12 is an enlarged cross-sectional view of the main part of the inner plug of FIG.
[0027]
In FIGS. 1 to 4 showing the structure of the inner stopper according to the present invention, the inner stopper engages with the top surface of the container mouth portion or the flange portion 1 that engages with the corner portion thereof, and the inner peripheral surface of the container mouth portion. The side wall part 2, the closed bottom part 3, and the opening gripping part 4 are provided.
[0028]
On the outer periphery of the side wall part 2, a large number of rib parts 5 and concave parts 6 extending in the height direction of the side wall part are alternately arranged. In the middle of each rib portion 5, a protrusion 7 is formed on a common plane parallel to the flange surface and on a common circumference.
That is, as is apparent from FIGS. 2 and 4, the rib portion 5 has a curved shape that is convex in the radially outward direction, and the most protruding portion in the radially outward direction is the protruding portion 7.
[0029]
As is apparent from the bottom view of FIG. 3, the outer shape of the protrusion 7 in the horizontal cross section is an arc that divides the circumference, so that the engagement with the container mouth is reliably performed.
On the other hand, the horizontal cross-sectional shape of the recess 6 is semicircular in the case of the specific example shown in FIG. 3, but is not limited to this example, and is U-shaped groove, V-shaped groove, inverted trapezoidal groove, semi-elliptical shape. It may be any groove shape such as a groove, a parabolic groove, a cycloid groove, or the like.
The dimensions of the protrusion 7 and the recess 6 are preferably within the ranges already pointed out.
[0030]
In the middle stopper of the present embodiment, a corner portion 8 (see FIG. 12) is formed at the base of the flange portion 1 to sealingly engage with the inner peripheral side corner portion 25c (see FIG. 7) of the container mouth portion. ing. With this configuration, the corner portions 8 and 25a are engaged not only in the vertical direction but also in the horizontal direction. Therefore, the bottom surface of the inner plug flange portion 1 and the top surface 25a of the container mouth portion are simply engaged in the vertical direction. As compared with the case of combining them, the hermetic holding can be further ensured. This method is particularly effective for the inner plug of the present invention that cannot be hermetically sealed at the side wall.
[0031]
In this inner plug, the arc-shaped gripping member 4 is integrally provided on the side wall portion 2 through a pair of spaced apart inner portions 9 and 9, and the gripping member 4 has a circumferential a between the connecting portions 9 and 9. , B extends to the longer circumference a.
[0032]
In the connecting structure of the gripping member 4 and the side wall 2 described above, these are smoothly connected inside the connecting portions 9 and 9, so that the portions of the connecting portions 9 and 9 are the other side wall 2 and the gripping portion. It is thicker than 4, and is not easily stretched when the grip portion 4 is pulled, so that a tensile force is easily transmitted to the side wall portion.
[0033]
Further, in the inner plug according to the present invention, since the gripping member 4 extends to the longer side a of the circumferences a and b between the connecting portions 9 and 9, the tensile force by the gripping member 4 is exerted on the side wall 2. Since the seal break and the opening of the inner plug proceed in this order in a concentrated manner on the shorter circumference b, there is an advantage that liquid jumping at the time of opening is eliminated.
[0034]
That is, at the time of opening, when the gripping member 4 is picked with a finger and pulled in the opening direction, first, the pair of separated connecting portions 9 and 9 are first pulled inwardly and on the longer circumferential side, A seal break occurs between the outer peripheral surface of the side wall portion 2 and the inner peripheral surface of the container mouth portion. Next, the peeling force is applied to the seal width from the both sides of the pair of connecting portions 9 and 9 or in the vicinity thereof along the shorter circumference b of the side wall 2 and toward the center C of the shorter circumference b. The opening operation proceeds so as to gradually narrow.
[0035]
Therefore, when opening the inner plug, the sealing break of the inner plug is always prioritized, and then the opening, that is, the removal of the inner plug proceeds, so that the occurrence of liquid jumping at the time of opening is completely suppressed. Moreover, since the plug is opened so that stress is concentrated from both sides at the point of removal of the inner plug from the container (center C of the shorter circumference), there is an advantage that the opening operation can be easily and reliably performed. Is achieved.
[0036]
  The side wall portion 2 of the inner plug is formed in a circular shape as a whole, and the inner peripheral surface 13 thereof is formed in a tapered shape so that the diameter decreases downward so that the die can be easily removed. On the other hand, the outer peripheral surface 10 hasribAlthough the part 5 and the recessed part 6 are formed,ribA protruding portion 7 that bulges most in the radially outward direction is formed at a position spaced apart from the flange portion 2 of the portion 5. A taper portion whose diameter decreases downward is formed below the projection portion 7 so that the container mouth portion can be easily plugged.
[0037]
On the other hand, the gripping member 4 is preferably formed as a part of an annular member having an inner diameter smaller than the inner diameter of the side wall portion 2, and the relationship between the gripping member 4 and the side wall portion 2 is as follows. . That is, when a virtual annular body A including the side wall portion 2 and a virtual annular body B including the gripping member 4 and extending thereon are considered, both of them are formed on the inner peripheral surface of the annular body A. It is in an eccentric positional relationship in which the inner peripheral surface of B is inscribed. The inside of these annular bodies A and B is filled with molding resin and forms an inner plug. That is, the side wall portion 2 and the gripping member 4 exist independently in the longer circumference a portion of the two circumferences from the connecting portions 9, 9, but in the shorter circumference b portion, the annular body The inner peripheral surface of the side wall portion 2 is defined so as to include both A and B. More specifically, in this connection structure between the gripping member 4 and the side wall portion 2, the thickness of the side wall portion is the largest at the base of the gripping member 4 to the side wall portion 2, and then at the center between the connection portions. There is a part where the thickness gradually decreases toward the center, and there is a part with the smallest thickness in the center between the connecting parts, so that removal from the container mouth is easy at the part with the smallest thickness when opening It has become.
[0038]
As best shown in FIG. 4, the outer peripheral surface of the gripping member 4 forms a tapered surface whose diameter decreases downward in the same manner as the inner peripheral surface 10 of the side wall 2. The peripheral surface also has a vertical surface or a tapered surface whose diameter decreases downward, but the taper angle of the outer peripheral surface is larger, and the thickness of the gripping member 4 in the radial direction gradually decreases downward. In the gripping member 4 having the above thickness distribution, it is easy to remove the mold at the time of molding, for example, by first removing the inner mold from the inner peripheral surface of the gripping member, and then forcibly removing the outer mold, Die cutting can be performed easily.
[0039]
The inner plug to be used is not limited in this case, but it is preferable that the upper surface of the gripping member 4 is provided so as to be flush with the upper surface of the flange portion 1 of the inner plug. In this structure, the inner plug with the gripping member is most easily molded, and the thickest gripping member upper surface and the flange portion upper surface are connected, so that the inner plug can be easily removed by opening the plug.
Furthermore, it is preferable to have a positional relationship such that the surface passing through the lower end edge of the gripping member 4 intersects at least a part of the protrusion 7 on the outer periphery of the side wall, particularly the part above the protrusion 7. With such an arrangement, when opening the plug, the outer periphery of the side wall can be easily separated from the container mouth with the protrusion 7 as a fulcrum, and the seal break and the inner plug can be easily removed.
[0040]
At approximately the center of the inner peripheral surface of the gripping member 4, at least one rib 11 for improving finger engagement is provided so as to extend in the circumferential direction. In addition, the center of the gripping member 4 becomes a weld line where the divided resin flow merges at the time of molding, but it becomes a relatively thick reinforcing portion in order to prevent this part from being broken at the time of opening. ing.
[0041]
In this specific example, a thin and narrow extension portion 12 is formed on the outer periphery of the flange portion 2 of the inner plug, and the extension portion 12 is simultaneously plugged while the inner plug is set in the cap. When opening the inner plug, only the cap can be removed prior to that, and the operation will be described in detail later.
[0042]
In the inner plug of the present invention, the inner diameter (Rb) of the annular body B including the gripping member 4 is such that at least a finger can be inserted when the plug is opened. In general, Rb preferably has a diameter of at least 13.2 mm.
In addition, the thickness in the radial direction of the gripping member 4 is preferably in the range of 0.7 to 1.05 mm on the upper surface portion from the viewpoint of the opening ability.
[0043]
The resin material constituting the inner plug can be made of any plastic known per se, but is preferably made of a relatively soft resin material, for example, an olefin resin, and in particular, an elastic modulus (JIS). K7203) is 2000 to 10,000 kg / cm²Can be easily opened with a time lag between the seal break and the plug opening when made of olefin-based resins such as linear low density polyethylene (LLDPE) and linear ultra-low density polyethylene (LUDPE). It becomes possible.
[0044]
The inner plug of the present invention can be advantageously applied to a liquid pouring mechanism or a valve mechanism that can be opened and closed on the top or top. That is, this type of cap has a structure that protrudes considerably upward from the container mouth due to the liquid dispensing mechanism or the openable / closable valve mechanism described above. Use is essential.
Hereinafter, this example will be described with reference to FIGS.
[0045]
In FIG. 5, the container lid includes a synthetic resin cap 30, a synthetic resin inner stopper 20, and an overcap 90.
The cap 30 roughly includes a top portion 31 and a skirt portion 32, and includes a valve mechanism 60 that can be opened and closed at the center upper portion of the top portion 31.
A ring-shaped horizontal flange portion 51 is formed in the radially inward direction of the top portion 31, and a skirt portion 32 hangs downward from an outer end portion of the top portion 31. On the inner surface (lower surface) of the horizontal flange portion 51, an annular protrusion 52 for holding the inner plug is formed. The function of this protrusion 52 will be described later.
A thread 35 is formed on the inner surface of the skirt portion 32, and the cap 1 is detachably engaged and fixed to the container mouth 25 by the thread 35. That is, a screw thread 26 is formed on the outer surface of the container mouth part 25, and the cap 30 is fixed to the container mouth part 25 by screwing the screw thread 35 and the screw thread 26.
Further, a plug stopper projection 53 is formed on the inner surface of the skirt portion 32 above the thread 35 with a small gap from the horizontal flange portion 51. The function of the inner stopper locking projection 53 will also be described later.
[0046]
In the above-described container lid, a hollow cylinder 55 is formed at the center upper portion of the top portion 31 of the cap 30 through a stepped portion 54, and the hollow space in the hollow cylinder 55 is below the top portion 31. It communicates with the side space, and if there is no inner plug 20, it communicates with the inside of the container.
On the other hand, a small-diameter columnar body 56 extends concentrically in the hollow cylinder 55, and its upper end protrudes from the hollow cylinder 55. The positional relationship between the columnar body 56 and the hollow cylinder 55 is apparent from FIGS. As shown in FIGS. 8 to 11, the columnar bodies 56 are held inside the hollow cylinder 55 by bridges 57 provided at regular intervals, and the space in the hollow cylinder 55 is the bridge 57. Therefore, the space between the inner surface of the hollow cylinder 55 and the outer surface of the columnar body 56 forms a pouring path 58, and the content liquid is poured out through the pouring path 58.
[0047]
Returning to FIG. 5 again, the valve member 60 is fitted in the hollow cylinder 55 so as to be slidable up and down.
As the valve member 60 moves up and down, the above-described pouring path 58 is opened or closed. The valve member 60 is lifted to open the pouring path 58 and is lowered to close the pouring path 58. It is done.
The valve member 60 includes a ceiling wall 61, an inner ring 62 and an outer cylindrical wall 63 extending downward from the ceiling wall 61, and a hollow cylinder between the inner ring 62 and the outer cylindrical wall 63. 55 is slidably fitted. An opening 64 is formed in the central portion of the ceiling wall 61.
That is, as shown in FIG. 5, when the valve member 60 is in the lowest position (normal state), the upper end portion of the columnar body 56 closes the opening 64. 58 is blocked and the content liquid cannot be dispensed. On the other hand, when the valve member 60 is raised, the opening 64 is opened, and the extraction channel 58 communicates with the outside. Therefore, the content liquid can be poured out in this state.
In such a structure, a general consumer can pull up the valve member 60 with his mouth while holding the container with one hand, for example, which is very convenient for drinking a container content liquid such as a beverage.
[0048]
An undercut (projection) 65 is formed on the inner surface of the lower end of the outer cylindrical wall 63 of the valve member 60, while a locking projection 59 is preferably provided on the outer surface of the upper portion of the hollow cylinder 55. .
That is, it is possible to prevent a trouble that the valve member 60 rises too much and comes off due to the engagement between the locking protrusion 59 and the undercut 65. Further, when a locking projection is provided on the outer surface of the lower portion of the hollow cylinder 55, the valve member 60 can be stably held at the lowermost position (normal state) by the engagement between the undercut 65 and the locking projection. it can. In addition, a feeling of opening and closing due to the rising or lowering of the valve member 60 can be given to the consumer.
Further, as is apparent from FIG. 5, the container lid of the present invention is commercially available with an overcap 90 provided in terms of hygiene, commercial value, or prevention of water intrusion due to cooling after hot pack. To be served. For this reason, it is desirable to form a substantially upright stepped portion 54 at the intermediate portion from the top portion 31 to the outside of the hollow cylinder 55 and to lock the overcap 90 to this portion.
[0049]
It is particularly suitable that the thin peripheral extension 12 is formed in the inner plug 20. The engagement relationship between the thin peripheral edge portion 12 and the inner plug locking projection 53 formed on the inner surface of the cap skirt portion 32 is controlled as follows.
That is, in the state before the cap is plugged, as shown clearly in FIG. 5, the thin peripheral extension portion 12 of the inner plug 20 has a dimensional relationship in which the inner plug locking projection 53 is securely engaged.
On the other hand, in a state where the cap is plugged into the container mouth portion, as clearly shown in FIG. 7, the thin peripheral edge extension portion 12 is in a state in which the dimension is reduced in the radially inward direction. This is because, as the cap 30 is plugged, the inner plug 20 is naturally also plugged, but the diameter of the protrusion 7 of the inner plug 20 is slightly larger than the diameter of the inner surface 29 of the container mouth portion 25. This is because the flange portion 1 and the thin peripheral edge extension portion 12 are drawn in the radially inward direction.
The above points will be further described.
[0050]
In the container lid of the present invention, the inner stopper 20 is inserted into the cap 30 prior to capping. In this state, the thin peripheral edge portion 12 of the inner stopper 20 has a cap as shown in FIG. It engages with a plug stopper locking projection 53 formed on the inner surface of the skirt portion 32. Accordingly, it is possible to effectively prevent the inner plug 20 from falling off the cap 30, and it is possible to reliably carry and carry the capping step.
[0051]
Next, capping is performed on the mouth portion 25 of the container filled with the content liquid hot. When capping is performed by turning the cap 30 in the closing direction, the inner plug 20 is also pushed down by the lowering of the cap 30, and at the end of the capping, as shown in FIGS. It is fitted in the mouth part 25.
In the inner stopper 20 fitted in the container mouth portion 25, the protruding portion 7 of the inner stopper 20 is engaged with the inner surface 29 of the container mouth portion 25, and the cylindrical side wall 2 is squeezed by the container mouth portion 25. The outer diameter of the thin peripheral edge 12 is slightly reduced.
Further, in this state, the ring stopper 52 for holding the inner plug formed on the inner surface of the horizontal flange portion 51 bites into the flange portion 1 of the inner plug 20, so that the inner plug 20 is firmly attached to the container mouth portion. It is fixed to 25 and sealing is ensured.
In the state of FIG. 6 and FIG. 7 in which capping is completely completed, since the outer diameter of the thin peripheral edge 12 is small, when the cap 30 is raised in this state, the thin peripheral edge 12 It does not engage with the stop projection 53, or even if engaged, the degree of engagement is weak.
[0052]
In this cap with an inner stopper, hot filling is generally performed by filling a liquid content at a temperature of 70 ° C. or higher, particularly 80 to 95 ° C. In general, it is preferably performed for about 20 to 40 seconds.
By laying down after hot filling, hot liquid spreads through the recess 6 in the side wall portion of the inner plug 20 to almost the entire area of the inner plug 20, and the inner plug 20 is effectively sterilized by heat and sterilized, thereby improving the storage stability of the contents. To do.
Furthermore, it is particularly effective in combination with a heated liquid spraying process after lying down following hot filling. In this heating liquid spraying step, in order to effectively sterilize the inner plug 20, as shown in FIGS. 6 and 7, the fine through hole 70 reaching the space 71 around the inner plug sealing portion is formed in the cap skirt-like side wall 32. It is preferable to provide it. The fine through-holes 70 are circumferential slits, and in the example shown in the figure, four fine through-holes 70 are provided in an axially symmetrical manner in the circumferential direction.
Each of these slits 3 penetrates completely from the outer surface to the inner surface of the cap body. In this embodiment, the opening area of each slit 3 is 0.04 mm.² It is.
In this cap, during the heat sterilization or sterilization, the sprayed hot water flows through or is sucked into the external space 71 of the container mouth through the slit 3, and the container mouth top surface 25a and the inner plug closest to the sealing engagement portion. The flange portion 1 is contacted and heated, so that the sealing engagement portion and its peripheral portion are effectively sterilized or sterilized.
[0053]
The container in which the cap 30 and the inner stopper 20 are attached to the container opening 25 as shown in FIGS. 6 and 7 is commercially available in this state, and a general consumer who has purchased the container first puts the cap 30 in the opening direction. The cap 30 is raised by turning and the cap 30 is removed from the container mouth portion 25.
When the cap 30 is pivoted and raised in the opening direction, the pressing force against the inner plug flange 1 of the annular protrusion 52 for pressing the inner plug is also released, but the thin peripheral edge 12 and the inner plug locking protrusion 53 The engagement is disengaged. That is, the thin peripheral edge portion 12 is made of synthetic resin and is easily deformed in relation to being thin, and it is assumed that the thin peripheral edge portion 12 is slightly engaged with the inner plug locking projection 53. However, the thin peripheral edge portion 12 is deformed and easily detached from the projection 53.
Thus, when the cap 30 is opened, only the cap 30 is lifted and removed from the container mouth portion 25, and the inner stopper 20 remains in the container mouth portion 25 as it is.
[0054]
After removing the cap 30 from the container mouth portion 25, as already described, by holding the gripping member 4 by hand and pulling it up, the inner plug 20 remaining in the container mouth portion 25 is taken out and discarded. Next, the cap 30 is attached to the container mouth portion 25 again.
When the cap 30 is attached to the container mouth part 25 from which the inner stopper 20 has been removed, the annular protrusion 52 for holding the inner stopper comes into pressure contact with the upper end of the container mouth part, and the sealing performance inside the container is sufficiently secured.
Further, in this state, since the space in the container communicates with the pouring path 58 formed in the cap 30, a general consumer raises the valve member 60 to pour out or drink the content liquid. The pouring channel 58 can be closed by lowering the valve member 60.
[0055]
The thickness and diameter of the thin-walled peripheral portion 12 are reliably held by the locking projection 53 when plugged, and on the other hand, when the plug is opened, is the engagement between the internal-plug locking projection 53 and the thin-walled peripheral portion 12 generated? Or even if it engages, it sets so that it may remove | deviate from an engagement state easily. For example, the thickness of the thin peripheral edge 12 is preferably about 100 to 200 μm.
[0056]
The lid 30 and the overcap 90 having the above-described structure can be formed of various plastics. Specifically, olefin resins such as polyethylene, propylene-ethylene copolymer, propylene-butene 1 copolymer; acrylonitrile-styrene-butadiene (ABS) resin; impact-resistant styrene resin; acrylic resin; nylon resin, etc. Preferably, high density polyethylene, polypropylene and the like can be exemplified, and each member can be molded by injection molding, compression molding or the like using these plastics.
[0057]
The container lid with an inner stopper of the present invention is a container lid of the type in which the inner stopper is retained in the container lid in the stage before capping, and the inner stopper remains in the container mouth when the container lid is removed from the container mouth after capping. The push-pull type cap having the structure shown in FIG. 5 and the like is particularly effectively applied to a squeeze bottle filled with various beverages.
Further, the structure of the lid is not limited to the structure shown in FIG. 5, and the contents dispensing opening may be formed in various shapes or structures.
[0058]
【The invention's effect】
According to the present invention, since a large number of ribs and recesses extending alternately in the height direction of the side wall portion are alternately arranged on the outer periphery of the side wall portion, the height is between the dispersed engagement portions with the inner peripheral surface of the container mouth portion. Since there are many recesses extending in the direction, the content liquid can move through the recesses, and the entire region of the inner plug can be effectively sterilized or sterilized by hot filling and lying down of the contents. In addition, since the ribs and the recesses are alternately present, the opening operation of the inner plug proceeds easily and smoothly, and a seal break is performed at the initial stage of opening the plug, resulting in liquid splashing at the time of opening. It can be effectively resolved.
Furthermore, in the container lid with an inner stopper of the present invention, it is possible to seal the inner stopper together with the container lid at the same time with the container mouth, and when opening the inner stopper, only the cap is required. Detachable.
[Brief description of the drawings]
FIG. 1 is a top view of an example of the inner plug of the present invention.
FIG. 2 is a side view of the inner plug of FIG. 1;
FIG. 3 is a bottom view of the inner plug of FIG. 1;
4 is a side sectional view of the inner plug of FIG. 1. FIG.
FIG. 5 is a partial cross-sectional side view showing a preferred example of a container lid with an inner stopper according to the present invention.
FIG. 6 is a partial cross-sectional side view showing a preferred example of a container lid with an inner stopper according to the present invention together with a container mouth portion.
7 is an enlarged cross-sectional view of a main part of FIG.
8 is a top view showing the container lid of FIG. 5 with the valve member removed. FIG.
9 is a partial cross-sectional side view of the container lid of FIG.
10 is a side sectional view of the container lid of FIG. 8. FIG.
11 is a bottom view of the container lid of FIG. 8. FIG.
12 is an enlarged cross-sectional view of a main part of the inner plug of FIG. 4;

Claims (3)

A flange portion which sealingly engages the top surface and the inner peripheral side corner portion of the container mouth portion, a side wall portion which engages the inner peripheral surface of the container mouth part, easy-open closure of which had a closed bottom portion In the stopper,
A corner portion that is hermetically engaged with the inner peripheral side corner portion of the container mouth portion is formed at the base of the flange portion,
A large number of ribs and recesses extending alternately in the height direction of the side wall portion are alternately arranged on the outer periphery of the side wall portion, and on the common plane parallel to the flange surface and on the common circumference between the rib portions. Are formed so that each of the protrusions is engaged with the inner peripheral surface of the container mouth, and the diameter of the circumference is defined, and each of the recesses is formed on the inner peripheral surface of the container mouth. The radial dimension of each of the recesses is defined to be spaced radially inward,
The side wall portion or the closed bottom surface portion is provided with a grasping portion for opening.
Easy-to-open inner plug characterized by that. The easily openable inner plug according to claim 1, wherein the number of ribs is 6 to 24. A lid made of a synthetic resin that is detachably attached to the container mouth by screw fastening, and an easily-openable middle stopper made of synthetic resin that is sandwiched between the lid and the upper end of the container mouth. In the lid with an easily openable inner stopper provided with a valve mechanism that can be opened and closed in the lid,
The easily openable inner plug has a flange portion that sealingly engages with the top surface and inner peripheral corner portion of the container mouth portion, a side wall portion that engages with the inner peripheral surface of the container mouth portion, and a closed bottom surface portion. A thin peripheral edge portion is provided on the outer periphery of the flange portion, and a corner portion is formed at the base of the flange portion so as to be sealingly engaged with the inner peripheral side corner portion of the container mouth portion, and is formed on the outer periphery of the side wall portion. A plurality of ribs and recesses extending alternately in the height direction of the side wall portion are alternately arranged, and in the middle of the rib portions, there are protrusions located on a common plane parallel to the flange surface and on a common circumference. The diameter of the circumference is defined so that each of the protrusions engages with the inner peripheral surface of the container mouth, and each of the recesses is spaced radially inward from the inner peripheral surface of the container mouth. Therefore, the radial dimension of each of the recesses is defined, and a stopper for opening is provided on the side wall or the closed bottom. It is,
The lid includes a top plate portion provided with a horizontal flange portion and a skirt portion suspended from the horizontal flange portion, and an inner surface of the skirt portion includes a thread and a screw formed on an outer surface of the container mouth portion. A screw for engaging the inner plug is formed at a position above the screw and at a small interval from the horizontal flange portion.
In the state before the stoppering, the easily openable inner stopper is locked to the lid body by engaging the thin peripheral edge portion with the projection for locking the inner plug of the lid body. Each of the protrusions formed on the rib portions of the side wall portions engages with the inner peripheral surface of the container mouth portion to reduce the outer diameter, thereby reducing the outer diameter of the thin peripheral edge portion. The inner diameter of the inner stopper locking projection, the outer diameter of the thin peripheral edge, and the inner peripheral surface of the container mouth so that the peripheral edge is not engaged with the inner stopper locking protrusion or the degree of engagement is weak. The outer diameter of each of the protrusions is defined,
A container lid with an easily openable inner stopper characterized by that.

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