JP2008081184A - Lid of pottery container with wide opening and sealing method using the lid - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lid which generates no leakage even though a container falls over sideways, and is not too bulky as a trash and is applicable to a rise of internal pressure which is caused by hot filling and a drop in internal pressure which is caused by a reduction in liquid temperature, in a pottery container with a wide opening such as a jar having lower dimensional precision of a spout section. <P>SOLUTION: The lid 1 of a pottery container with a wide opening is composed of a round top surface section 2, and a cylindrical trunk section 3 hang down from a peripheral edge of the top surface section 2, and is made of a material having rubber elasticity. The top surface section 2 has a diameter smaller than the external diameter of the spout section 11 of the pottery container 10 with a wide opening, and has a thin-walled section 15 thinner than an abutment portion 12 on an inner part 13 rather than the abutment portion 12 which abuts on the spout section 11 of the pottery container 10 with a wide opening. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a lid of a wide-mouth ceramic container for enclosing a liquid such as high alcoholic alcoholic beverages or shochu, and a container sealing method using the lid.

  To seal high-mouthed pottery containers used for high-alcoholic liquors and sake such as shochu, there are a cork stopper method and a sealing method in which the entire lid and main body mouth are covered with plaster. However, wide-mouthed pottery containers are made of pottery, so the mouth dimensions vary and the dimensional accuracy is poor. Also, when sealing alcoholic beverages such as high alcoholic alcoholic beverages and shochu, an increase in internal pressure due to hot filling and a decrease in internal pressure due to a subsequent decrease in liquid temperature occur. There is a current situation that requires a lot of labor.

  In addition, for the purpose of sealing containers having poor dimensional accuracy, such as pottery, a technique relating to a simple and inexpensive rubber elastic sheet-like lid is disclosed (for example, see Patent Document 1).

JP 2001-88553 A

  However, the cork stopper method is inferior in sealing performance, and the sealing method in which the lid and the whole body mouth part are covered with gypsum has a large amount of dust to be discharged, and when it is laid down, leakage may occur over time due to capillary action.

  In addition, the lid of Patent Document 1 is sufficient if it is simply sealed, but it is accompanied by an increase in internal pressure due to hot filling and subsequent decrease in liquid temperature when sealing alcohol such as high alcoholic alcoholic beverages or shochu. It cannot cope with a drop in internal pressure. That is, if the wall thickness is thin, the rubber-like elastic sheet-like lid is extended and the lid is prevented from popping out due to an increase in internal pressure, but the lid is torn due to heat. Moreover, the surface of the mouth part of the container made of wide-mouthed pottery has irregularities, and when it hits, the hit point becomes the starting point, and the problem that the sheet-like lid is torn occurs. On the other hand, if the wall thickness is thick, the lid tear due to heat and the lid tear due to collision are suppressed, but the sheet-like lid of the rubber elastic body becomes difficult to stretch, and the rise of the internal pressure is not alleviated and the lid pops out. Occurs. Furthermore, the workability of attaching the lid is significantly reduced.

  Accordingly, the present invention provides a container made of a wide-mouthed pottery such as a bowl with a low dimensional accuracy of the mouth, and does not leak even if it is laid down, and the lid is not too bulky as dust, and the internal pressure rises due to hot filling and thereafter It aims at providing the lid | cover which can respond to the fall of the internal pressure accompanying the liquid temperature fall. It is another object of the present invention to provide a container sealing method with good sealing performance using the lid for a wide-mouth ceramic container according to the present invention.

  The present inventors, when a lid formed of a material having rubber elasticity is mounted on a wide-mouthed ceramic container, the thickness of the lid of the portion covering the opening without contacting the container, The inventors have found that the above-mentioned problems can be solved by making the thickness smaller than the thickness of the lid of the portion in contact with the container, and have completed the present invention.

  Specifically, the lid for a wide-mouthed pottery container according to the present invention comprises a circular top surface portion and a cylindrical body portion depending from the periphery of the top surface portion, and is formed of a material having rubber elasticity. In the lid for a wide-mouth ceramic container, the top surface portion has a diameter smaller than the outer diameter of the mouth of the wide-mouth ceramic container, and more than a contact portion with the mouth of the wide-mouth ceramic container. The inner part has a thin part thinner than the contact part.

  In the lid for a wide-mouth ceramic container according to the present invention, it is preferable that the thin portion has a dome shape. Since the thin-walled portion has a dome shape, it is possible to respond to the increase in internal pressure due to hot filling and the decrease in internal pressure due to the subsequent decrease in liquid temperature by the volume change that occurs when the dome portion is deformed up and down. This makes it possible to prevent the lid from popping out and bursting.

  In the lid for a wide-mouthed pottery container according to the present invention, it is preferable that the thin-walled portions have a wave shape with the same circular center. Since the thin-walled portion has a wave shape with the same circular center, the volume change that occurs when the wave-shaped portion is deformed up and down with respect to a rise in internal pressure due to hot filling and a drop in internal pressure due to a subsequent drop in liquid temperature It is possible to cope with this, and the pop-out and rupture of the lid can be suppressed.

  In the lid for a container made of wide-mouth ceramics according to the present invention, it is preferable that a convex portion connected in series is provided along the lower peripheral end of the body portion. Since the adhesion of the lid is increased, it is possible to suppress the lid from popping out due to an increase in internal pressure due to hot filling. Further, when the body portion is tightened with a string or a band, the string or the band is hardly displaced.

  In the lid for a container made of wide-mouth ceramics according to the present invention, it is preferable that a convex portion connected in series along the upper peripheral end of the body portion is further provided. By providing a series of convex parts along the lower and upper peripheral edges of the body part, the adhesion of the lid is further increased, and workability when fastening the body part with a string or band is good It becomes.

  In the lid for a wide-mouth ceramic container according to the present invention, a check valve that opens when a positive pressure is applied to the center of the top surface portion and closes when no pressure is applied or a negative pressure is applied. Is preferably provided. The lid can be prevented from popping out and rupturing due to an increase in internal pressure due to hot filling. On the other hand, even if the internal pressure drops due to the subsequent liquid temperature drop, the outside air is not mixed.

  The method for sealing a wide-mouthed pottery container according to the present invention is to expand and attach the lid according to the present invention to the mouth part of the wide-mouthed pottery container, and wind a string or band around the body part of the lid to fix it. It is characterized by.

  In the method for sealing a wide-mouthed ceramic container according to the present invention, before attaching the lid, first, the mouth of the wide-mouthed ceramic container is covered with a plastic film, and then the lid is covered so as to cover the plastic film. It is preferable to wear it. While further improving the sealing performance, it is possible to prevent the lid material from deteriorating by limiting the contact between the lid and the alcohol component.

  The lid of the present invention does not leak even if it is laid down in a wide-mouthed pottery container such as a bowl with a low dimensional accuracy of the mouth, and the lid is not too bulky as dust, and the internal pressure increases due to hot filling and thereafter The lid can be prevented from popping out or bursting in response to a decrease in internal pressure accompanying a decrease in liquid temperature. Moreover, the sealing method of the wide-mouthed pottery container according to the present invention can provide good sealing performance even in a wide-mouthed pottery-made container such as a bag having a low dimensional accuracy by using the lid according to the present invention.

  Embodiments of the present invention will be described with reference to the accompanying drawings. The embodiment described below is an example of the configuration of the present invention, and the present invention is not limited to the following embodiment.

  A lid for a wide-mouth ceramic container according to this embodiment will be described with reference to FIGS. 1 and 2. FIG. 1 is a schematic view showing a first form of a lid for a wide-mouth ceramic container according to the present embodiment, wherein (a) is a longitudinal sectional view and (b) is a plan view. FIGS. 2A and 2B are diagrams for explaining a state in which the lid according to the first embodiment is attached to a wide-mouth ceramic container, in which FIG. 2A shows before installation and FIG. 2B shows after installation. As shown in FIG. 1, the lid 1 for a wide-mouth ceramic container according to the first embodiment includes a circular top surface portion 2 and a cylindrical body portion 3 hanging from the periphery of the top surface portion 2, and has rubber elasticity. It is a lid for a container made of wide-mouthed pottery made of a material. As shown in FIG. 2, the top surface portion 2 has a diameter smaller than the outer diameter of the mouth portion 11 of the wide-mouthed pottery container 10, and from a contact portion 12 with the mouth portion 11 of the wide-mouthed pottery container 10. Further, the inner portion 13 has a thin portion 15 that is thinner than the contact portion 12.

  The wide-mouth pottery container 10 is called a bowl and has a recess 16 on the outer periphery of the mouth part 11. Since it is made of earthenware, the accuracy of the shape is low, and the mouth part 11 is not opened in a perfect circle shape, and the surface of the mouth part 11 has fine irregularities derived from raw materials or glazes and gentle irregularities derived from molding. is there.

  The lid 1 for the wide-mouth ceramic container 10 is formed of a material having rubber elasticity. The material having rubber elasticity is, for example, a rubber material such as natural rubber or synthetic rubber, or an elastomer. Silicon rubber is preferred.

  The top surface portion 2 has a circular shape. In general, the mouth portion 11 of the wide-mouthed ceramic container 10 such as a bowl has a circular shape, and the lid 1 and the wide-mouthed ceramic container 10 have a similar relationship with the shape of the mouth portion 11 and the shape of the top surface portion 2. This is because the contact force at the contact portion is uniform.

  The body part 3 has a cylindrical shape that hangs down from the periphery of the top surface part 2. This is because the body portion 3 is easily adhered to the outer peripheral surface of the mouth portion 11 of the wide-mouth ceramic container 10. Here, the drooping is not only when the body part 3 is connected vertically from the periphery of the top surface part 2 but also when the diameter of the cylinder increases or decreases in diameter toward the lower peripheral end of the body part 3. If you want to. It is preferable that the distance between the upper peripheral end and the lower peripheral end of the body portion 3, that is, the height is larger than the length that can completely cover the recess 16 of the mouth portion 11. It is possible to make the hook catch good.

  The top surface portion 2 has a diameter smaller than the outer diameter of the mouth portion 11 of the wide-mouth ceramic container 10. The lid 1 is expanded in the mounted state, and is restored by the property of the material having rubber elasticity in the unmounted state. When the lid 1 is in the mounted state, a restoring force is exerted by the expansion, and this restoring force acts as a force with which the body portion 3 comes into close contact with the outer peripheral surface of the mouth portion 11. The diameter of the top surface portion 2 is preferably 85 to 96%, more preferably 89 to 93% with respect to the outer diameter of the mouth portion 11 of the wide-mouth ceramic container 10.

  Since the thin part 15 is thinner than the contact part 12 with the mouth part 11 of the wide-mouth ceramic container 10, it is easy to expand when receiving the same internal pressure. The thickness of the abutting portion 12 and the body portion 3 of the top surface portion 2 with the mouth portion 11 of the wide-mouth ceramic container 10 is preferably 1.2 to 3.0 mm, more preferably, the wall thickness is 1.5-2.0 mm. On the other hand, the thickness of the thin portion 15 is preferably 0.8 to 2 mm, and more preferably the thickness is 1 to 1.2 mm. Here, although there is an overlapping range of thicknesses, the thickness of the abutting portion 12 and the body portion 3 of the top surface portion 2 with the mouth portion 11 of the wide-mouth ceramic container 10 is made thicker than the thickness of the thin portion 15. By doing so, the thin-walled portion 15 serves as a pressure adjusting means against an increase in internal pressure due to hot filling and a subsequent decrease in internal pressure accompanying a decrease in liquid temperature. In order to enable a wide pressure adjustment with respect to the positive pressure or the negative pressure, the thin portion 15 preferably has a dome shape as shown in FIG. Since the thin-walled portion has a dome shape, it is possible to respond to the increase in internal pressure due to hot filling and the decrease in internal pressure due to the subsequent decrease in liquid temperature by the volume change that occurs when the dome portion is deformed up and down. This makes it possible to prevent the lid from popping out and bursting. FIG. 3 is a diagram for explaining how the dome-shaped portion performs pressure adjustment when the lid according to the first embodiment is used. As shown in FIG. 3, when the internal pressure rises due to hot filling (during doming) A, the lid 1 relaxes the internal pressure rise by expanding more than the normal time X, and the internal pressure associated with the subsequent drop in liquid temperature is reduced. At the time of descent (vacuum) B, the internal pressure drop is relieved by recessing in a concave shape.

  Drawing 4 is a schematic diagram showing the 2nd form of a lid for a container made from wide mouth ceramics concerning this embodiment, (a) is a longitudinal section and (b) shows a plane. In the lid 21 for a wide-mouth ceramic container according to the second embodiment shown in FIG. 4, it is preferable that the thin-walled portion 15 has a wave shape with the same center. Since the thin-walled portion 15 has the same concentric corrugated shape, as with the lid 1 for a wide-mouth ceramic container according to the first embodiment, the internal pressure increases due to the increase in internal pressure due to hot filling and the subsequent decrease in liquid temperature. It is possible to cope with the descent by a volume change that occurs when the corrugated portion is deformed up and down, and it is possible to prevent the lid from popping out and bursting.

  FIG. 5: is the schematic which shows the 3rd form of the lid | cover for containers made from a wide-mouthed pottery concerning this embodiment, (a) is a longitudinal cross-sectional view, (b) showed the plane. In the lid 31 for a wide-mouth ceramic container according to the third embodiment shown in FIG. 5, the thin portion 15 is formed on a flat surface. However, even in this embodiment, the lid 31 is used when the internal pressure increases due to hot filling. In this case, the increase in the internal pressure is alleviated by swelling more than usual, and when the internal pressure is lowered due to the subsequent decrease in the liquid temperature, the depression in the internal pressure can be alleviated by recessing in a concave shape.

  As shown in FIG. 1 (a), FIG. 4 (a) or FIG. 5 (a), a convex portion 7a connected in series is provided along the lower peripheral end of the body portion 3 of the lids 1, 21 and 31. It is preferable. Furthermore, in addition to the convex part 7a, it is preferable to provide a convex part 7b connected in series along the upper peripheral end of the body part 3 of the lids 1, 21 and 31. When the annular convex portion 7 connected in series is provided, the adhesion of the lids 1, 21 and 31 to the wide-mouthed pottery container increases at the portion of the convex portion 7, so that the lid pops out due to an increase in internal pressure due to hot filling. Can be suppressed. In addition, the string or the band that fastens the body part 3 is less likely to be displaced. It is preferable that the convex part 7 protrudes 1-3 mm on the basis of the surface.

  As shown in FIG. 1, a check valve 8 that opens when a positive pressure is applied to the lid 1 at the center of the top surface portion 2 and closes when no pressure is applied or a negative pressure is applied. It is preferable to provide it. An example of the configuration of the check valve 8 is as follows. For example, as shown in FIG. 1, a thick bulge 9 a that protrudes inward is formed at the top of the dome-shaped thin portion 15. The thick bulge 9a is provided with cuts 9b penetrating the front and back surfaces. That is, the check valve 8 has a thick bulge 9a that protrudes inwardly provided in the thin portion 15 and a cut 9b that penetrates the front and back surfaces of the thick bulge. When no stress is applied, the cut line 9b is in a state where the surfaces generated by cutting are in contact with each other and closed. On the other hand, when the internal pressure rises due to hot filling, as shown in FIG. 3A, the dome shape of the thin portion 15 swells more, so that the thick bulge 9a receives tensile stress and bending stress due to expansion. . The combined stress of the tensile stress and the bending stress acts as a force for opening the cut 9b because the thick bulge 9a has a convex shape inside. Thereby, since the gas inside the container is released to the outside, an increase in internal pressure can be mitigated. On the other hand, as shown in FIG. 3B, the thin-walled portion 15 is recessed into a concave shape when the internal pressure is lowered due to the subsequent drop in the liquid temperature. Therefore, the thick bulge 9a has a tensile stress and a bending stress due to expansion. Receive. The combined stress of the tensile stress and the bending stress acts as a force for closing the cut 9b because the thick bulge 9a has a convex shape inside. Thereby, gas is not mixed from the outside and sealing performance can be secured. As described above, by providing the check valve 8, it is possible to further prevent the lid from popping out and rupturing due to an increase in internal pressure due to hot filling. On the other hand, even if the internal pressure drops due to the subsequent liquid temperature drop, the outside air is not mixed.

  The lid for the wide-mouth ceramic container according to the present embodiment is preferably provided with a knob portion 14 at the lower peripheral end of the body portion 3 for easy mounting and detachability. Also, as shown in FIG. 1 (a), FIG. 4 (b) or FIG. 5 (b), a plurality of ridges along the circumferential direction are provided in parallel on the inner peripheral surface of the body part 3, It is preferable to provide a non-slip 18 for the purpose of increasing the frictional resistance with the mouth of the wide-mouth ceramic container.

  Next, a method for sealing a wide-mouth ceramic container according to this embodiment will be described step by step with reference to FIG. FIG. 6 is a view for explaining a mounting procedure when a wide-mouth ceramic container is sealed using the lid according to the first embodiment. The method for sealing a wide-mouthed pottery container according to the present embodiment is to attach the lid 1 according to the present invention to the mouth part 11 of the wide-mouthed pottery container 10 and attach a string or band 17 to the body part 3 of the lid 1. It is to wind and fix.

  First, the wide-mouth ceramic container 10 is washed with water, and the unevenness of the mouth portion 11 of the wide-mouth ceramic container 10 is confirmed. A container having a large unevenness of the mouth portion 11 corrects the unevenness. Next, hot cleaning and sterilization such as hot water and steam are performed. At this time, the pressure is appropriately changed depending on the capacity of the wide-mouth ceramic container 10, for example, 5 liters, 9 liters or 24 liters. Next, as shown in FIG. 6 (a), a high-alcohol liquor is filled in a sterilized wide-mouthed ceramic container 10 at a high temperature. At this time, alcohol and water vapor are volatilized because high alcoholic liquors are hot.

  Next, as shown in FIG.6 (c), the lid | cover 1 which concerns on this invention is expanded and mounted | worn with the mouth part 11 of the container 10 made from a wide-mouthed pottery. At this time, as shown in FIG. 2C, the upper peripheral end of the body portion 3 is in contact with the outer peripheral surface of the mouth portion 11, and the peripheral portion of the top surface portion 2 is in contact with the outer peripheral surface of the mouth portion 11. Installing. By expanding and mounting the lid 1 according to the present invention, the adhesion at the contact portion between the lid 1 and the mouth portion 11 can be enhanced, and the sealing performance can be enhanced. And since high alcohol liquor is high temperature, as shown to A of FIG. 3, the thin part 15 will be in the state which the dome shape expanded more.

  Here, as shown in FIG. 6B, a step of covering the mouth portion 11 with a plastic film 19 such as a polywrap may be provided before the lid 1 is attached to the mouth portion 11. The plastic film 19 may be double or triple coated. Plastic film 19 includes vinyl chloride such as vinylidene chloride and polyvinyl chloride, additive-free polyethylene film, polypropylene-polyethylene double-layer film, polyethylene-nylon-polyethylene three-layer structure film, polyolefin-based multilayer wrap film, etc. Non-vinyl chloride type, and it is preferable that both are for food. Among these, an additive-free polyethylene film is more preferable. While further improving the sealing performance, it is possible to prevent the lid material from deteriorating by limiting the contact between the lid and the alcohol component. Moreover, since the plastic film 19 will be in a suction | inhalation state inside a container if it will be in a storage state after the fall of the internal pressure accompanying a liquid temperature fall, it will confirm that the plastic film 19 is in a suction state. Thus, it is possible to confirm the presence or absence of opening before that. As a result, a function for preventing mischief can be provided.

  Next, as shown in FIG. 6 (d), it is preferable to provide a step of winding and fixing the string or band 17 around the body portion 3 of the lid 1 after the lid 1 is expanded and attached. Since the string or band 17 is wound along the recess 16 provided in the outer peripheral portion of the mouth portion 11 of the wide-mouthed ceramic container 10, it is difficult to shift and the pop-up of the lid 1 due to internal pressure can be prevented. Moreover, if the convex part 7a connected in series along the lower peripheral end of the trunk | drum 3 is provided, the effect of the pop-out prevention of the lid | cover 1 will become higher.

  After the string or band 17 is wound and fixed, it waits for the liquid temperature of the contents to drop. When the liquid temperature decreases, the internal pressure becomes negative, and the vacuum state, that is, the dome shape is convex downward as shown in FIG.

  Next, as shown in FIG. 6 (f), a plastic film 20 is further attached so as to cover the attached lid 1. The lid 1 that is about to contract is protected by the restoring force.

  Next, as shown in FIG. 6G, the upper lid 21 is placed on the mouth portion 11. The material of the upper lid is not particularly limited, but wooden is preferable for improving the texture. The upper lid 21 serves as a protective lid against impact.

  Next, as shown in FIG. 6 (h), a shrink cap 22 is placed and hot air is blown to contract. At this time, it is preferable that the shrink cap 22 is covered so as to cover the lid 1, the string or band 17, the plastic film 20 and the upper lid 21.

  The sealed wide-mouthed pottery container 10 thus sealed has high sealing performance, so that even if it is stored on its side, no oozing occurs due to capillary action, and even if something hits the mouth. , The lid will not tear and leak.

It is the schematic which shows the 1st form of the lid | cover for containers made from wide-mouthed ceramics concerning this embodiment, (a) is a longitudinal cross-sectional view, (b) is a plane. It is a figure explaining the state which attached the lid concerning the 1st form to the container made from a wide mouth ceramics, (a) showed before wearing and (b) showed after wearing. It is a figure explaining a mode that a dome shape part performs pressure adjustment when the lid concerning the 1st form is used. It is the schematic which shows the 2nd form of the lid | cover for containers made from a wide-mouthed pottery concerning this embodiment, (a) is a longitudinal cross-sectional view, (b) is a plane. It is the schematic which shows the 3rd form of the lid | cover for containers made from a wide-mouthed pottery concerning this embodiment, (a) is a longitudinal cross-sectional view, (b) is a plane. It is a figure for demonstrating the mounting | wearing procedure when sealing a container made from a wide-mouthed earthenware using the lid | cover which concerns on a 1st form.

Explanation of symbols

1, 21, 31 Lid 2 Top surface part 3 Body part 7 Convex part 7a Convex part 7b on the lower peripheral end of the body part Convex part 8 on the upper peripheral end of the body part Check valve 9a Thick bulge 9b Cut 10 Made of wide mouth ceramic Container 11 Mouth part 12 Abutting part 13 with the mouth part 11 Part 14 inside the abutting part 12 Knob part 15 Thin part 16 Indentation 17 String or band 18 Non-slip 19, 20 Plastic film 21 Upper lid 22 Shrink cap A Dorming X Normal B Vacuum

Claims (8)

In a lid for a container made of wide-mouthed pottery made of a material having rubber elasticity, consisting of a circular top surface part and a cylindrical body part hanging from the periphery of the top surface part,
The top surface portion has a diameter smaller than the outer diameter of the mouth portion of the wide-mouthed pottery container, and is located on the inner side of the contact portion with the mouth portion of the wide-mouthed pottery container than the contact portion. A lid for a container made of wide-mouth ceramics, characterized by having a thin-walled portion.   The lid for a wide-mouth ceramic container according to claim 1, wherein the thin-walled portion has a dome shape.   The lid for a wide-mouth ceramic container according to claim 1, wherein the thin-walled portions have a wave shape with the same circular center.   The lid for a container made of wide-mouthed ceramics according to claim 1, 2 or 3, wherein a convex portion connected in series is provided along the lower peripheral end of the body portion.   5. The lid for a wide-mouth ceramic container according to claim 4, further comprising a convex portion connected in series along the upper peripheral end of the body portion.   A check valve is provided at the center of the top surface portion, which is opened when a positive pressure is applied and closed when no pressure is applied or a negative pressure is applied. A lid for a container made of wide-mouth ceramics according to 3, 4, or 5.   The lid of claim 1, 2, 3, 4, 5 or 6 is attached to the mouth of a wide-mouth pottery container, and is fixed by winding a string or band around the body of the lid. How to seal a wide-mouth ceramic container.   8. The mouth of the wide-mouth ceramic container is first covered with a plastic film before the lid is attached, and then the lid is attached so as to cover the plastic film. How to seal a wide-mouth ceramic container.

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