JP3606939B2 - Pilfer proof cap sealing plug - Google Patents

Description

[0001]
[Industrial application fields]
The present invention has a sealing wall that is tightly fitted to a mouth portion of a container such as a beverage bottle, and more specifically, a peripheral wall that includes a screw portion that is removably screwed to a screw portion formed on the outer periphery of the container mouth portion. A lid main body, a pilfer proof band connected below the peripheral wall via a breakable bridge, and a sealing plug fitted in an airtight state on the inner peripheral surface of the container mouth portion when closed. The present invention relates to a seal stopper for a pilfer proof cap.
[0002]
[Prior art]
Conventionally, an airtight leak prevention cap using a sealing plug has been proposed in which the sealing inside the container is released together with the opening operation (see Japanese Patent Publication No. 62-18421).
[0003]
Such a container is filled with, for example, a sterilized hot liquid content in a filling process called a hot pack, and then a sealing stopper is tightly fitted to the container mouth.
[0004]
[Problems to be solved by the invention]
However, after the above hot pack, the sealing performance may be deteriorated due to shrinkage deformation or loss of elasticity of the container mouth portion or the sealing plug. In such a case, the contents can be stored without being spoiled. There was a need for countermeasures.
[0005]
This invention is made in view of such a situation, and it aims at providing the sealing stopper by which a sealing performance does not fall after a hot pack.
[0006]
[Means for Solving the Problems]
In the present invention, means for solving the above-described problems are configured as follows.
That is, in the first aspect of the present invention, a lid body having a peripheral wall provided with a screw portion that is detachably screwed to a screw portion formed on the outer periphery of the container mouth portion, and a breakable portion below the peripheral wall. A pilfer pull band connected via a bridge, and a sealing plug fitted in an airtight state on the inner peripheral surface of the container mouth portion at the time of closing, the sealing stopper is an inner peripheral surface of the container mouth portion. A peripheral wall that is in close contact with the outer peripheral flange that is seated on the upper surface of the container mouth portion outward from the upper end of the peripheral wall, and a peripheral end portion of the bottom wall that has a mountain-shaped vertical cross section on the inner surface of the peripheral wall Are connected to each other, and when the cap is opened, the screw portion of the lid main body or the protrusion provided on the lid main body comes into contact with the outer peripheral flange of the sealing plug, and the sealing plug is lifted above the container mouth portion. It is configured to further the outer peripheral flange or cover the body of the sealing plug The top plate, at the time of opening and closing the lid body, is configured so that the air introduction passage which allows the discharge of air in the air into the intake and external from the outside into between the container opening and the sealing plug is formed Yes.
[0007]
The invention according to claim 2 is characterized in that a reinforcing rib is provided at a connecting portion between the inner surface of the peripheral wall and the peripheral end of the bottom wall of the sealing plug according to claim 1.
[0008]
[Action]
In the first aspect of the invention, if the peripheral wall of the sealing plug is contracted and deformed after hot-packing, the peripheral wall is projected from the inside by the bottom wall having a mountain-shaped cross section. The deformation to is suppressed.
In addition, since the inside of the container has a negative pressure and the outside air flows into the outside of the sealing plug and becomes atmospheric pressure, the differential pressure causes the peripheral wall of the sealing plug to be pressed against the inner wall of the container mouth, and further a sealing effect is obtained. Rise.
In addition, since the air between the sealing plug and the top plate of the lid body is released to the outside in the closing process, the lid body is not pressurized by the air in the bottom wall of the sealing plug, and is completely The lid body can be smoothly closed until reaching the closed state.
On the other hand, at the time unplugging, rotates the lid body, for peripheral flange of the sealing plug, the screw portion Moshiku of the lid body is pushed up upward by ridges provided on the lid body, the sealing The stopper is lifted and the container mouth is opened. Even in the opening process, since the air introduction path is formed between the sealing plug and the lid body, the sealing plug can be smoothly opened without rotating together with the lid body.
On the other hand, even when the lid body is slightly rotated due to mischief or carelessness, the sealing plug does not rotate together, the sealed state is maintained, and it is opened without knowing, causing airtight leakage, contents are Ru can prevent the occurrence of problems that would be altered.
[0009]
According to the second aspect of the present invention, the reinforcing rib provided at the connecting portion between the bottom wall and the peripheral wall effectively distributes the stress at the time of shrinkage deformation. And shrinkage deformation of the peripheral wall can be more effectively suppressed.
[0010]
【Example】
Embodiments of the sealing plug of the pilfer proof cap according to the present invention will be described in detail below with reference to the drawings.
1 is a longitudinal sectional view of a sealed container mouth, FIG. 2 is a longitudinal sectional view of a sealing stopper, and FIG. 3 is an exploded perspective view of the container mouth and an airtight leakage prevention cap. The mouth part 2 is a lid body that is detachably screwed into a screw part (screw groove) 11 formed on the outer periphery of the container mouth part 1, and 3 is fitted in an airtight state on the inner peripheral surface of the container mouth part 1. The sealing plug is detachably provided inside the lid body 2 and is closed by pushing down the lid body 2 when the lid is closed. The sealing plug 3 and the lid body 2 constitute an airtight leakage prevention cap. Yes.
[0011]
In the above-described sealing plug 3, an outer peripheral flange 32 seated on the upper end of the container mouth portion 1 is formed outward at the upper end of the peripheral wall 31 that is in close contact with the inner peripheral surface of the container mouth portion 1, while the peripheral wall 31. The inner peripheral surface of the bottom wall 33 is connected to the peripheral end of the bottom wall 33 having a mountain-like longitudinal cross-sectional shape. The center portion of the bottom wall 33 is formed to be slightly higher than the outer peripheral flange 32. When the lid is closed, the center portion is pushed down by the top plate 23 of the lid main body 2, and the peripheral wall 31 is protruded outwardly to be tightly sealed. (See FIG. 4). In order to make the above-described vertical cross-sectional shape a mountain shape, for example, a shape such as an isosceles trapezoidal shape, a dome shape, or the like protruding upward may be used.
[0012]
With such a configuration of the sealing plug 3, even if the peripheral wall 31 of the sealing plug 3 tends to shrink and deform after the contents are filled with the hot pack, the peripheral wall 31 is inwardly formed by the bottom wall 33 having a mountain-shaped vertical cross section. Therefore, deformation in the contraction direction is suppressed. Thereby, the sealing state of the sealing stopper 3 with respect to the container mouth part 1 is ensured, and the contents are protected without being spoiled for a long time.
[0013]
A pilfer proof band 5 is connected below a peripheral wall 21 having a screw part (thread groove) 22 of the lid body 2 described above via a breakable bridge 4... Includes a locking piece 51 which is locked from below to a locking step portion 13 formed via a flat portion 12 below the screw portion 11 of the container mouth portion 1 and is provided in an upwardly inclined manner. By means of the locking pieces 51,..., The pilfer proof band 5 is locked at the illustrated position so as to be locked and rotatable.
[0014]
On the other hand, an interval a (see FIG. 1) is set between the upper end of the screw portion 22 of the peripheral wall 21 of the lid main body 2 and the top plate 23 connected to the upper end of the peripheral wall 21, and from the closed state (a− When the lid body 2 moves above the thickness of the outer peripheral flange 32, the upper end of the screw portion 22 comes into contact with the outer peripheral flange 32 and the sealing plug 3 is lifted upward, so that it can be opened by the opening operation. ing. In the present embodiment, the sealing plug 3 is lifted using the screw portion. However, the present invention is not limited to this, and a lifting protrusion may be provided separately.
[0015]
A plurality of arc-shaped air grooves g,... Are formed in the outer peripheral flange 32 (see FIG. 3) of the sealing plug 3 described above, and the air grooves g,. h,... are formed, and these air introduction paths h,... and air grooves g,... are formed in the screw part 11 of the container mouth 1 in the vertical direction when the lid body 2 is opened and closed. ,... Communicates with the lid body 2 and the sealing plug 3 to allow the intake of air from the outside and the discharge of the air to the outside so that the opening and closing operations can be performed smoothly. . The air introduction path h and the air groove g may be formed in the top plate 23 of the lid body 2, and the air introduction path i may be formed in the screw portion 22 of the lid body 2.
[0016]
The peripheral wall 31 of the sealing plug 3 is in close contact with the inner surface of the container mouth portion 1 until the lower portion T of the outer peripheral flange 32. Therefore, by setting the opening distance X of the lid body 2 until the bridges 4,... Are broken to X <(T + a−the thickness of the outer peripheral flange 32), the lid can be covered by mischief or carelessness. Even if the main body 2 is rotated, as long as the bridges 4,... Are not broken, it is possible to eliminate the problem that the sealing plug 3 is opened and airtight leakage occurs.
[0017]
The above-described sealing plug 3 is fitted and integrated in the lid body 2 in advance, and after the contents are filled with a hot pack in a synthetic resin container (not shown), the lid body 2 is opened to the container mouth. When being screwed to 1, the center portion of the bottom wall 33 is pushed down by the top plate 23 of the lid body 2 and is press-fitted into the container mouth 1, thereby sealing the container. At that time, the locking pieces 51,... Provided inside the pilfer proof band 5 get over the flat portion 12 and are locked to the locking step portion 13.
[0018]
In the above-described closing process, air between the sealing plug 3 and the top plate 23 of the lid body 2 is discharged from the air introduction path i to the outside through the air introduction path h and the air groove g. The lid body 2 is not pressurized by the air in the bottom wall 33, and the lid body 2 can be smoothly closed until a complete plugged state is reached.
[0019]
And even after the closure, even if the peripheral wall 31 of the sealing plug 3 tends to shrink and deform inward due to a temperature drop after hot-packing, the bottom wall 33 is stretched from the inside as described above. Thus, a complete sealed state is maintained. Further, since the inside of the container has a negative pressure and external air flows into the outside of the sealing plug 3 and becomes atmospheric pressure, the peripheral wall of the sealing plug 3 is pressed against the inner wall of the container mouth by this differential pressure, and the seal is further sealed. Increases effectiveness.
[0020]
On the other hand, when the lid is opened, when the lid body 2 is rotated until the bridges 4 are cut, the pilfer proof band 5 remains and the outer peripheral flange 32 of the sealing plug 3 is connected to the upper end of the screw portion 22. Therefore, the sealing stopper 3 is lifted and the container mouth 1 is opened. Even in the opening process, an air layer is formed between the sealing plug 3 and the lid body 2, so that the sealing plug 3 can be smoothly opened without rotating together with the lid body 2. In this embodiment, the pilfer proof band 5 remains in the shed, but the band portion is provided with one vertical breakage portion and one uncut bridge, and the band is removed together with the lid body simultaneously with opening. You may do it.
[0021]
On the other hand, even if the lid body 2 is slightly rotated due to mischief or carelessness, the sealing plug 3 does not rotate together, and the sealing plug 3 is lifted unless the bridges 4 are cut. However, the sealed state is maintained, and it is possible to prevent the occurrence of a problem that the contents are altered by opening the plug without knowing and causing airtight leakage.
[0022]
FIG. 5 shows a different embodiment in which a plurality of reinforcing ribs R ₁ , R ₂ ,... The bottom wall 33 is provided to effectively disperse the stress and further improve the tension effect of the bottom wall 33 with respect to the peripheral wall 31.
[0023]
【The invention's effect】
As described above, according to the sealing plug of the pilfer-proof cap of the present invention, the peripheral end portion of the bottom wall whose longitudinal cross-sectional shape forms a mountain shape is connected to the inner surface of the peripheral wall in close contact with the inner peripheral surface of the container mouth portion. Therefore, even after the closure, even if the peripheral wall of the sealing plug shrinks and deforms inward due to a temperature drop after hot-packing, as described above, the bottom wall is stretched from the inside, so that in the shrinking direction. Thus, a complete sealed state is maintained. In addition, since the inside of the container has a negative pressure and the outside air flows into the outside of the sealing plug and becomes atmospheric pressure, the differential pressure causes the peripheral wall of the sealing plug to be pressed against the inner wall of the container mouth, and further a sealing effect is obtained. Rise.
In addition, in the present invention, since the air between the sealing plug and the top plate of the lid body is released to the outside during the closing process, the lid body is pressurized by the air in the bottom wall of the sealing plug. However, the lid body can be smoothly closed until a completely closed state is reached.
On the other hand, at the time unplugging, rotates the lid body, for peripheral flange of the sealing plug, the screw portion Moshiku of the lid body is pushed up upward by ridges provided on the lid body, the sealing The stopper is lifted and the container mouth is opened. Even in the opening process, since the air introduction path is formed between the sealing plug and the lid body, the sealing plug can be smoothly opened without rotating together with the lid body.
On the other hand, even if the lid body is slightly rotated due to mischief or carelessness, the sealing plug does not rotate together, the sealed state is maintained, and it is opened without knowing and airtight leakage occurs, It is possible to prevent the occurrence of defects that cause the contents to be altered.
[0024]
Further, by providing reinforcing ribs at the connecting portion between the inner surface of the peripheral wall and the peripheral end portion of the bottom wall, the stress can be more effectively distributed and the bottom wall tension effect can be further improved. The present invention does not specify the combination of the sealing plug and the lid main body in the embodiment, and may be used in combination with different types of lid main bodies, or may be used as a single sealing plug. Needless to say.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view in a closed state showing an embodiment of a sealing plug of the present invention.
FIG. 2 is a longitudinal sectional view of the sealing plug.
FIG. 3 is an exploded perspective view of the same.
FIG. 4 is an explanatory view of a tensioning action of the bottom wall.
FIG. 5 is a longitudinal sectional view showing another embodiment of the sealing plug.
[Explanation of symbols]
1 ... container mouth part, 3 ... sealing plug 31 ... peripheral wall, 32 ... outer circumferential flange 33 ... base wall, R _1, R ₂ ... reinforcing rib.

Claims (2)

A lid body having a peripheral wall provided with a screw part removably screwed to a screw part formed on the outer periphery of the container mouth part, and a pilfer pull band connected to the lower part of the peripheral wall via a breakable bridge And a sealing plug fitted in an airtight state on the inner peripheral surface of the container mouth portion at the time of closing, the sealing plug being a peripheral wall in close contact with the inner peripheral surface of the container mouth portion, and an outer side from the upper end thereof. The outer peripheral flange is seated on the upper surface of the container mouth portion, and the inner surface of the peripheral wall is configured to be connected to the peripheral end of the bottom wall having a mountain-shaped longitudinal cross-sectional shape. The screw portion of the lid body or a protrusion provided on the lid body is in contact with the outer peripheral flange of the sealing plug, and is configured to lift the sealing plug above the container mouth, and further, the sealing plug When opening and closing the lid body on the outer flange of the lid or the top plate of the lid body, Sealing plug of pilfer-proof cap, characterized in that it is configured as an air introduction path which allows the discharge of air to the air intake or the outside from the outside to between the sealing plug is formed. The sealing plug of the pilfer proof cap according to claim 1, wherein a reinforcing rib is provided at a connecting portion between the inner surface of the peripheral wall and the peripheral end of the bottom wall.

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