JP5457394B2 - Storage container, storage method using storage container - Google Patents

Description

  The present invention relates to a can body that is formed into a cylindrical shape like a pail can or a drum can, and a base plate is wound around the bottom of the can, a storage container that includes a canopy for closing the can, and a storage method using the storage container .

  Storage containers such as pail cans and drums have been widely used. This storage container is used for storage and transportation of various liquids including chemicals, paints, and oils. Moreover, this storage container is normally comprised by the cross-sectional circular shape, has an opening part in the upper part, and can make the said opening part sealed with a circular container lid.

  By the way, this container lid is formed with a fitting groove for fitting the storage container body in an annular shape, and this fitting groove is made of resin to maintain the airtightness and liquid tightness inside the container. Often made of rubber and rubber packing.

  FIG. 9 shows an example of a storage container in which a rubber packing is provided in the fitting groove as disclosed in Patent Document 1. FIG. 9 is an exploded exploded perspective view of the storage container of the conventional example and an enlarged cross-sectional view showing the structure of the edge overlapping portion of the lid, and FIG. 10 is a cut view showing a state where the lid and the container body of the same conventional example are fastened and fixed. It is an expanded sectional view. A storage container 51 such as a pail can has a container main body 55 including an opening 52 having a fully open upper portion, and a lid fixing edge 53 that is wound around the outside of the opening 52 to have an appropriate width and is curved and formed. A ring packing 56 having an elastic restoring force that is in close contact with the entire upper periphery of the lid fixing edge 53, a lid main body 57, and a lid fixing edge formed at a portion overlapping the lid fixing edge 53 of the lid main body 57. A part of the edge overlapping portion facing the appropriate portion on the inner side in the middle of the lid fixing edge portion 53 is protruded toward the lid fixing portion. The lid 60 formed of the projecting portion 59, the edge overlapping portion 58 of the lid 60, and the lid fixing edge portion 53 of the container body 55 are pressed down so that the ring packing 56 is contracted and adhered, and the edge overlapping portion 58 and the lid fixing edge The part 53 is hermetically sealed. To. Incidentally, a plurality of lugs 71 are provided on the outer periphery of the lid 60, and the lugs 71 can be locked so as to enclose the lid fixing edge portion 53.

JP 2000-177765 A

  By the way, in the disclosed technique which concerns on the patent document 1 mentioned above, between the container main body and the exterior is shielded by the ring packing 56, and it will be in a sealed state. For this reason, it can be said that it is a more preferable structure in the case where what is filled in the container body needs to be stored in a sealed state.

  However, when the storage in a sealed state such as grease is not required and there is no particular problem even if it comes into contact with the outside air, the configuration of the ring packing 56 described above is not particularly necessary. In addition to this, the grease is filled into the container body while being heated to a relatively high temperature. However, if the canopy is closed in this state to shut off the outside air, the temperature of the grease decreases. Due to the heat shrinkage, the gas in the container body also acts to reduce the pressure accordingly. Hereinafter, this pressure reducing action is called a vacuum phenomenon. At this time, if a vacuum phenomenon occurs when the inside of the container main body is completely sealed by the ring packing 56, the container main body is recessed inward and the container is deformed. In particular, when a supplier delivers grease to a business partner, if the appearance of the container body filled with the grease is bad, it will damage the verdict of the business partner. It was.

  Therefore, the present invention has been devised in view of the above-described problems, and the object of the present invention is to use a container body when filling a stored item that changes in temperature after filling, such as grease. It is in providing the storage container which can prevent that it dents inside, and the storage method by a storage container.

In order to solve the above-described problem, a storage container to which the present invention is applied closes the can body, in which a base plate is wound around the bottom of the can and an opening is formed at the top. In the storage container provided with a canopy, the can body has a curved fixed edge formed so as to be wound around the outside of the opening, and the canopy is a peripheral groove formed at a portion overlapping the fixed edge. And a plurality of lugs extending from the peripheral groove portion, and the peripheral groove portion is overlaid on the fixed edge portion, and the fixed edge portion is encapsulated by the lug and locked to the opening. The peripheral groove portion has a protruding portion that is not filled with packing and protrudes at a portion inside the top portion, and the protruding portion is contacted and supported by the fixed edge portion when the cover is closed. The peripheral groove by Said forming a cavity between the fixed edge, the lug is provided to extend to the tip is shaped such that the cross-sectional arc shape substantially raised vertically upward, the generally from the arc of the top The protruding portion is formed substantially at the center up to the part raised vertically upward .

In order to solve the above-described problem, a storage container to which the present invention is applied closes the can body, in which a base plate is wound around the bottom of the can and an opening is formed at the top. In the storage container provided with a canopy, the can body has a curved fixed edge formed so as to be wound around the outside of the opening, and the canopy is a peripheral groove formed at a portion overlapping the fixed edge. The opening can be closed by superimposing the peripheral groove on the fixed edge, and the peripheral groove is not filled with a packing and protrudes at a portion inside the top. has, the protrusion forms a cavity between the circumferential edge groove and the fixed edge by being contacted supported by the stationary edge when closed, arcuate cross-section and substantially raised vertically upward Molded to be Made from the top of the arc in substantially the center to form the protruding portion up to the site, it launched vertically upward the substantially, the a circumferential edge groove of the canopy and the fixed edge from the outside even when closed It is characterized by being tightened and fixed by a tightening and fixing means so as to be wrapped.

In addition, the storage method using the storage container to which the present invention is applied includes filling a can body, in which a base plate is wound around the bottom of the can and an opening is formed at the uppermost portion, and In a storage method using a storage container that stores the lid by closing it with a canopy, a peripheral groove is overlapped on a curved fixed edge that is wound around and formed outside the opening of the can body, and extends from the peripheral groove. The fixed edge portion is encased and locked by a plurality of provided lugs to close the opening, and in the peripheral groove portion, the packing is not filled and protruded at a portion inside the top portion. and the projecting portion is closed so as to form a cavity between the circumferential edge groove and the fixed edge by contacting the support with the fixed edge, raised substantially vertically upward circular cross The lug extends from the top of the arc, and the projecting portion is formed at the approximate center from the top of the arc to the portion raised substantially vertically upward. When the pressure in the can body changes depending on the temperature change of the filled items, air flows into the can body from the outside through the fine gap between the protrusion and the fixed edge. It is possible to allow air to flow out from the inside of the can body.

In addition, the storage method using the storage container to which the present invention is applied includes filling a can body, in which a base plate is wound around the bottom of the can and an opening is formed at the uppermost portion, and In a storage method using a storage container that stores the lid by closing it with a canopy, the peripheral groove is overlapped on the curved fixed edge formed to protrude outside the opening of the can body, and is encapsulated from the outside. Then, the peripheral groove portion and the fixed portion are fixed by tightening and fixing by means of tightening and fixing, and in the peripheral groove portion, the packing is not filled and the protruding portion protruded at a portion inside the top portion is in contact with the fixed edge portion and closed so as to form a cavity between the edge, it is shaped such that the cross-sectional arc shape substantially raised vertically upward, above the said arc of the top Be by forming the protruding portion at substantially the center up to the site, launched vertically upward, when attempting to change the pressure in the can body in accordance with a change in temperature of the filled stored item, the It is characterized in that air can be allowed to flow into the can body from the outside through a fine gap between the protruding portion and the fixed edge portion, or air can be flowed out from the can body to the outside.

  According to the present invention having the above-described configuration, the packing is not filled inside the peripheral groove portion, and the protruding portion and the fixed edge portion are in contact with each other, but when viewed in micron order, the fine gap Since this usually occurs, air can be passed through the fine gap into the can. That is, even when the lid is closed, the inside of the can body is not completely sealed, and can be vented to the outside through a fine gap. For this reason, when the vacuum phenomenon is about to act, it is possible to prevent air from flowing in from the outside and the can body from being dented inward, and it is possible to maintain a good-looking shape at all times.

  Further, in the present invention, the presence of the cavity can prevent the cap body from entering the can body, and the capillarity can prevent rainwater from entering the can body at once.

  Furthermore, in the present invention, although insects and impurities may be mixed up to the cavity through the gap of the lug, since it is an indispensable constituent element to contact the protruding part and the fixed edge part, such insects and Impurities can be prevented from passing through and entering the inside of the can body.

It is the assembly exploded perspective view of the storage container to which this invention is applied, and the expanded sectional view which shows the structure of the edge overlap part of a lid | cover. It is an expanded sectional view of the A section in Drawing 1 in a storage container to which the present invention is applied. It is an expanded sectional view for demonstrating the case where a peripheral groove part is inserted in a fixed edge part. It is a figure for demonstrating the example which tightens a lug with a clamping machine. It is an expanded sectional view of a peripheral groove part and a fixed edge part after closing a can body with a canopy. FIG. 3 is a diagram showing a state where rainwater that has entered the cavity is stored in the cavity 26. FIG. It is a figure which shows the assembly exploded perspective view of the storage container which fixes a canopy with a clamping fixture. It is an expanded sectional view of the peripheral groove part and the fixed edge part fastened by the fastening fixture. It is a figure which shows the example of the conventional storage container which provided the rubber packing in the fitting groove | channel. It is a cutting | disconnection expanded sectional view which shows the state which fastened and fixed the lid | cover and container main body of the prior art example.

  Hereinafter, embodiments of the present invention will be described in detail.

  FIG. 1 is an exploded perspective view of a storage container to which the present invention is applied and an enlarged cross-sectional view showing a configuration of an edge overlapping portion of a lid. The storage container 1 is embodied in, for example, a pail can or a drum can, and is formed in a cylindrical shape, and a base plate is wound around the bottom of the can, and an opening 2 formed by fully opening the upper portion; A can body 5 having a fixed edge 3 which is wound around the outside of the opening 2 to have an appropriate width and is formed to be curved, a handle 4 provided on the peripheral surface of the can body 5, and the opening 2 And a canopy 7 for closing the lid. The canopy 7 includes a peripheral groove portion 9 formed at a portion overlapping the fixed edge portion 3 when closed, and a plurality of lugs 21 extending from the peripheral groove portion 9. In addition, this invention is applicable also to any can bodies other than a pail can and a drum can, The shape is not limited to a cylindrical thing.

  FIG. 2 shows an enlarged cross-sectional view of a portion A in FIG. The peripheral groove portion 9 has a vertical wall portion 12 raised substantially vertically upward, and an arc portion 13 formed so as to have a cross-sectional arc shape indicated by a dotted line. The projecting portion 11 is formed substantially at the center from the vertical wall portion 12 to the site of the vertical wall portion 12. The protruding portion 11 is formed so as to protrude toward the inner side in the peripheral groove portion 9 and to protrude toward the inner side. As a method for forming the protruding portion 11, for example, a press working method, a roll working method, or the like may be used. Usually, this protrusion part 11 is comprised by the cross-sectional curved shape. A lug 21 extends from the tip of the arc portion 13. In addition, the packing is not filled inside the peripheral groove portion 9.

  The case where the can body 5 having the above-described configuration is closed by the canopy 7 will be described below. First, the canopy 7 is lowered from above the opening 2. At this time, as shown in FIG. 3, the peripheral groove portion 9 of the canopy 7 is aligned right above the fixed edge portion 3, and the peripheral groove portion 9 is lowered so as to fit into the fixed edge portion 3. The protrusion 11 comes into contact with the fixed edge 3. In this state, the projecting portion 11 is contacted and supported by the fixed edge portion 3.

  Next, the lug 21 is tightened by a tightening machine. As shown in FIG. 4 (a), the top plate 31 of the tightening machine is pressed against the top portion 13 a of the arc portion 13. At this time, the claw 22 of the fastening machine is at a position separated from the lug 21. Next, as shown in FIG. 4 (b), the lug 21 is pressed inward through the tip of the claw 22 of the tightening machine by rotating the claw 22 of the clamping machine around the rotary core 23. As a result, the lug 21 comes into contact with the peripheral wall of the can body 5. In the present invention, when the protrusion 11 is formed, it is work hardened to improve the in-plane rigidity, and when the claw 22 is pressed while being pressed by the top plate 31 as shown in FIG. Thus, the cavity 26 can be formed by the protrusion 11 being stretched.

  FIG. 5 shows an enlarged cross-sectional view of the peripheral groove 9 and the fixed edge 3 after the can body 5 is closed by the canopy 7. The fixed edge 3 is locked and fixed so as to be encapsulated by the lug 21. When the lid is closed, the protrusion 11 is supported by the fixed edge 3 so that a cavity 26 is formed between the peripheral groove 9 and the fixed edge 3. Further, the outer periphery 3a of the fixed edge 3 and the inner periphery 13b of the arc portion 13 are in contact with each other.

  In this invention, the following effects can be show | played by closing the canopy 7 to the can body 5 with such a structure.

  First, in the present invention, rainwater can be prevented from entering the inside of the can body 5 from the outside. If the lid is closed as described above, the rainwater enters the gap 26 between the outer periphery 3a of the fixed edge 3 and the inner periphery 13b of the arc portion 13 to the inside of the cavity 26 based on a so-called capillary phenomenon. . However, rainwater that has entered the cavity 26 is stored in the cavity 26 as shown in FIG. If the fixed edge portion 3 and the peripheral groove portion 9 are in contact with each other without forming the cavity 26, the rainwater that has entered will reach the inside of the can body 5 at a stretch by capillary action. However, it is possible to prevent capillary action by forming the cavity 26. FIG. 6B shows a front view in a state where the canopy 7 is closed. The cavity 26 is not completely sealed, but can be vented to the outside through a gap 48 provided between the lugs 21. For this reason, even if rainwater enters the cavity 26 from the gap 48, it can be discharged to the outside through the gap 48.

  At this time, the projecting portion 11 is configured to project at a portion on the inner side of the top portion 13 a, so that the contact distance between the projecting portion 11 and the fixed edge portion 3, the outer periphery 3 a of the fixed edge portion 3, and the arc portion 13 The distance of the contact with the circumference 13b can be increased. If this distance is too close, the rainwater mixed in the cavity 26 will pass through the gap between the protrusion 11 and the fixed edge 3 based on the capillary phenomenon, and rainwater will enter the can body 5. Will end up. If the distance is too short, the volume of the cavity 26 becomes small, and if the rainwater mixed in the cavity 26 increases even a little, it immediately reaches the gap between the protrusion 11 and the fixed edge 3. For this reason, the distance between the contact point between the protrusion 11 and the fixed edge 3 and the distance between the contact point between the outer periphery 3a of the fixed edge 3 and the inner periphery 13b of the arc portion 13 are separated to some extent, thereby entering the cavity 26. It is possible to prevent the rainwater that has entered into the can body 5 from entering through the capillary phenomenon. In other words, the presence of the cavity 26 can prevent entry into the can body due to capillary action.

  However, when the above-described distance is too long, that is, when the protruding portion 11 is provided on the hanging wall portion 12 as shown by the dotted line B and forms a contact point with the fixed edge portion 3, Rainwater that has entered falls under its own weight, and passes through the gap between the protruding portion 11 and the fixed edge portion 3 based on the capillary phenomenon, and rainwater enters the can body 5. . Moreover, when pressing the claw 22 described above, the effect of improving the in-plane rigidity that is prevented by the protrusion 11 being stretched cannot be expressed, and the cavity 26 cannot be formed. Further, when the protruding portion 11 is provided on the hanging wall portion 12 as indicated by the dotted line B, when the storage container 1 is stacked in a large amount, the weight cannot be endured and the cavity 26 is recessed.

  For this reason, it is desirable that the projecting portion 11 is formed at a substantially central position from the top portion 13 a of the arc portion 13 to the hanging wall portion 12.

  In addition, according to the present invention, although insects and impurities may be mixed up to the cavity 26 through the gap of the lug 21, it is essential that the protrusion 11 and the fixed edge 3 are in contact with each other. Since it is an element, it is possible to prevent such insects and impurities from passing through and entering the inside of the can body 5.

  Furthermore, the present invention exhibits a very advantageous effect when a stored item such as grease that changes in temperature after filling is filled. In view of ease of filling by improving fluidity, grease is filled into the container body while being heated to a relatively high temperature, particularly at the time of filling. In this state, the canopy is closed to shut off the outside air. In this case, due to the heat shrinkage caused by the decrease in the temperature of the grease, the gas in the container body also acts to reduce the pressure accordingly, and a vacuum phenomenon tends to occur. At this time, when a pressure reducing action is exerted in the can body 5, air can be flowed into the can body from the outside through the fine gap between the protrusion 11 and the fixed edge 3. Actually, the protrusion 11 and the fixed edge 3 are in contact with each other, but when viewed in micron order, a fine gap is usually generated, and air can be passed through the fine gap. It becomes. In particular, in the present invention, since the ring packing is not mounted inside the peripheral groove portion 9, the can body 5 is not in a completely sealed state but is configured to be able to vent from the outside through a fine gap. For this reason, when the vacuum phenomenon is about to act, it is possible to prevent the air from flowing in from the outside and the can body 5 from being dented inward, and it is possible to maintain a good-looking shape at all times. .

  Further, when the grease is filled in the can body 5, since the temperature is high, the air is heated and tends to expand, but even in such a case, through the fine gap between the protrusion 11 and the fixed edge 3. Air can be discharged to the outside, and the container can be prevented from expanding.

  Of course, the same advantageous effect can be exhibited not only in the case of grease but also in the case of filling a stored item that undergoes thermal expansion and contraction in accordance with a temperature change.

  Of course, the present invention may be embodied not only in the storage container described above but also as a grease storage method.

  Further, the present invention is not limited to the case where the canopy 7 is fixed by the lug 21 as described above. For example, the canopy 7 may be fixed using a fastening fixture 41 as shown in FIG. . In FIG. 7, the same components as those of FIG.

  The fastening device 41 is composed of a fastening band and can be freely tightened or opened only by operating the mechanical opening / closing operation unit 40. The canopy 7 is lowered so as to fit the peripheral groove portion 9 into the fixed edge portion 3, and finally, the opening / closing operation portion 40 of the tightening and fixing device 41 is operated to tension it. As a result, the tightening and fixing device 41 can be clamped and closed so as to enclose the peripheral groove portion 9 and the fixed edge portion 3 from the outside. The tightening and fixing device 41 is not limited to the above-described configuration. For example, the tightening and fixing device 41 may be formed of an elastically shrinkable material such as a rubber band, and may be fastened and fixed. Any known fastening and fixing means can be substituted.

  FIG. 8 shows an enlarged cross section of the peripheral groove 9 and the fixed edge 3 that are tightened by the tightening and fixing device 41. When the lid is closed, the protrusion 11 is supported by the fixed edge 3 so that a cavity 26 is formed between the peripheral groove 9 and the fixed edge 3. Even if rainwater enters the cavity 26, the contact between the protruding portion 11 and the fixed edge 3 is separated in the depth direction, so that the inside of the can body 5 is caused by capillary action through the contact as described above. It is possible to prevent rainwater from getting into the water. In this example, the configuration of the lug 21 is not provided.

  Hereinafter, the following tests were conducted to confirm the effect of the storage container to which the present invention was applied.

  First, a vacuum test for verifying whether or not the can body 5 can be prevented from being depressed even with respect to the vacuum phenomenon described above was performed. In this vacuum test, about 90 ° C. hot water was poured into the can body 5 of the storage container 1 to which the present invention was applied, and the canopy 7 was closed by the above-described method. Then, a set of a weight of 120 kg on the canopy 7 and a non-loading condition in which no such weight is placed are set one by one, and the canopy 7 and the can body 5 after being allowed to stand for 24 hours. The presence or absence of deformation was confirmed.

  As a result, no particular deformation was observed in the canopy 7 and the can body 5 due to the vacuum phenomenon in both the case where the weight was placed and the case where the weight was not placed.

  Next, about half of 90 ° C. hot water is poured into the can body 5 of the storage container 1 to which the present invention is applied, and about 8 cm below the fixed edge 3 are prepared. Was closed. Further, another storage container is placed on the canopy 7, and a weight of 120 kg is placed on the other storage container, and the canopy 7 and the can body 5 after being allowed to stand for 24 hours. The presence or absence of deformation was confirmed.

  As a result, no deformation due to the vacuum phenomenon was particularly confirmed for either about 90% hot water poured about 90 ° C. or about 8 cm below the fixed edge 3.

  Next, a shower ring test was performed. In this showering test, the canopy 7 was closed by the above method with the can body 5 being emptied. Next, using a watering nozzle, a shower corresponding to a rainfall of about 50 mm / 10 minutes was discharged into the closed storage container 1. After continuously performing this water discharge for 1 hour, after sufficiently wiping off the water droplets adhering to the surface of the storage container 1, the canopy 7 is removed and whether or not water has entered the inside of the can body 5. confirmed.

  As a result, no entry of water into the can body 5 was confirmed. In addition, since water was attached at the portion of the fixed edge 3 that just entered the cavity 26, it was possible to experimentally verify that the above-described action occurs.

  In addition, the test was conducted on its side. In this sideways test, the storage container 1 filled with water was laid sideways and left for 30 minutes. After 30 minutes, it was confirmed whether water leaked from between the can body 5 and the canopy 7. As a result, no water leakage was confirmed.

  Through the above experiments, the above-mentioned effects specific to the present invention could be confirmed.

DESCRIPTION OF SYMBOLS 1 Storage container 2 Opening part 3 Fixed edge part 4 Gender 5 Can fuselage 7 Canopy 9 Peripheral groove part 11 Projection part 12 Vertical wall part 13 Arc part 21 Lug 22 Claw 23 Claw rotation core 26 Cavity

Claims (7)

In a storage container comprising a can body in which a base plate is wound around the bottom of the can and an opening is formed at the top, and a canopy that closes the opening,
The can body has a curved fixed edge formed so as to be wound around the outside of the opening,
The canopy has a peripheral groove formed at a portion overlapping the fixed edge and a plurality of lugs extending from the peripheral groove, and the peripheral groove overlaps the fixed edge, and the lug The opening can be closed by locking so as to enclose the fixed edge,
The peripheral groove portion has a protrusion that is not filled with packing and protrudes at a portion inside the top portion, and the protrusion is contacted and supported by the fixed edge portion when the lid is closed, thereby the peripheral groove portion and the A cavity is formed between the fixed edge portion, and the lug is formed so as to rise up substantially vertically and to have a circular arc shape in cross section, and the lug extends from the top of the arc. A storage container, wherein the protruding portion is formed substantially at the center up to a portion raised upward . In a storage container comprising a can body in which a base plate is wound around the bottom of the can and an opening is formed at the top, and a canopy that closes the opening,
The can body has a curved fixed edge formed so as to be wound around the outside of the opening,
The canopy has a peripheral groove formed in a portion overlapping the fixed edge, and the opening can be closed by overlapping the peripheral groove on the fixed edge.
The peripheral groove portion has a protrusion that is not filled with packing and protrudes at a portion inside the top portion, and the protrusion is contacted and supported by the fixed edge portion when the lid is closed, thereby the peripheral groove portion and the A cavity is formed between the fixed edge and formed so as to be raised substantially vertically upward to have a circular arc shape in cross section, and from the top of the arc to the portion raised substantially vertically above. The above protrusion is formed in the center,
Further, when the lid is closed, the peripheral container of the canopy and the fixed edge portion are wrapped and fixed by a tightening and fixing means so as to enclose from the outside.   The can body is filled with stored items that undergo thermal expansion and contraction in response to temperature changes,
  The cavity should be able to vent to the outside through a gap provided between the lugs.
  The storage container according to claim 1. When the pressure in the can body changes depending on the temperature change of the contents filled in the can body, air is introduced into the can body from the outside through the fine gap between the protruding portion and the fixed edge portion. The storage container according to any one of claims 1 to 3, wherein the storage container is configured to be able to flow in or air can flow out from the can body. The presence of the cavity prevents entry into the can body due to capillary action,
The storage container according to any one of claims 1 to 4, wherein the contact portion between the protruding portion and the fixed edge portion prevents foreign matter from entering the can body. According to the storage container for storing the object by filling the can body with the base plate wound around the bottom of the can and having the opening formed at the top, and closing the opening with a canopy. In the storage method,
The peripheral edge is overlaid on the curved fixed edge formed to protrude outside the opening of the can body, and the fixed edge is encapsulated by a plurality of lugs extending from the peripheral groove. Lock and close the opening,
In the peripheral groove portion, a cavity is formed between the peripheral groove portion and the fixed edge portion by making the protruding portion protruded at a portion inside the top portion from being unfilled and contacting and supporting the fixed edge portion. In this way, the lid is closed and is raised substantially vertically upward so as to have a circular arc cross section, and the lug extends from the tip of the arc, and is raised substantially vertically upward from the top of the arc. The protrusion is formed in the approximate center leading to the part
When the pressure in the can body changes depending on the temperature change of the filled item, air can flow into the can body from the outside through a fine gap between the protrusion and the fixed edge. Or a storage method using a storage container, characterized in that air can flow out from the inside of the can body. According to the storage container for storing the object by filling the can body with the base plate wound around the bottom of the can and having the opening formed at the top, and closing the opening with a canopy. In the storage method,
Fastened and fixed by tightening and fixing means so as to enclose the peripheral groove portion from the outside on the curved fixed edge portion that is wound around and formed on the outside of the opening in the can body,
In the peripheral groove portion, a cavity is formed between the peripheral groove portion and the fixed edge portion by making the protruding portion protruded at a portion inside the top portion from being unfilled and contacting and supporting the fixed edge portion. In this way, the projection is formed at a substantially central position from the top of the arc to the portion raised substantially vertically upward. To form
When the pressure in the can body changes depending on the temperature change of the filled item, air can flow into the can body from the outside through a fine gap between the protrusion and the fixed edge. Or a storage method using a storage container, characterized in that air can flow out from the inside of the can body.

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