JP5517236B2 - Container sealing structure - Google Patents

Description

  The present invention relates to a container sealing structure for sealing an opening of a container with a lid.

  As a conventional container sealing structure of this type shown in FIG. 13, a sealing hood wall 2F is provided on the outside of the side wall 2S of the lid 2, and U between the side wall 2S and the sealing hood wall 2F is provided. A compression-elastic part 4 formed on the opening edge of the container 1 is formed into a U-shaped groove 2U, and is in close contact with the U-shaped groove 2U. The compression elastic part 4 is composed of a conical annular flexible wall 3 in which the upper end of the side wall 1S of the container 1 is folded outward and downward. Further, the retaining hood wall 5 is folded upward from the lower end portion of the annular flexible wall 3, and the retaining hood wall 5 is fitted to the outside of the sealing hood wall 2F and the outer surface of the sealing hood wall 2F. The locking projection 2K is locked to the locking recess 5K on the inner surface of the retaining hood wall 5 so that the container 1 is sealed. When the container 1 is opened, the lid 2 can be opened by cutting the retaining hood wall 5 with the locking recess 5K (see, for example, Patent Document 1).

Utility Model Registration No. 3108990 (Figs. 1-3)

  However, in the conventional container sealing structure described above, the insertion resistance of the compression elastic portion 4 into the U-shaped groove 2U increases due to variations in dimensions of the container 1 and the lid 2 due to manufacturing errors, thermal expansion, and the like, and the lid 2 It may take a lot of work to install.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a container sealing structure capable of easily sealing a container with a lid while suppressing the influence of variations in the dimensions of the container and the lid.

In order to achieve the above object, a container sealing structure according to the invention of claim 1 is provided with an inner fitting side wall which is fitted inside among a pair of side walls which are provided on the container and the lid and are fitted to each other. A sealing hood wall that covers the outer surface of the hood and forms a U-shaped groove between the inner fitting side wall and a side wall that protrudes laterally from the outer side surface of the outer fitting side wall that is fitted outside. In the container sealing structure that includes a compression elastic part that is pressed into and closely contacts the U-shaped groove, and can seal the opening of the container, the compression elastic part is an annular shape that protrudes obliquely from the outer surface of the outer fitting side wall. Ri Na folded back flexible wall outwardly at least 1 or more, the folded portion of the most distal end of the compression elastic portion with placing the side away from the back surface of the U-shaped groove, extending the retaining hood wall from its folded portion Can be fitted to the outside of the sealing hood wall, and the sealing hood A locking projection is provided on the outer surface of the retaining hood wall, and an annular locking recess for locking the locking projection is provided on the inner surface of the retaining hood wall. Further, a cut is made from the tip of the retaining hood wall to the annular retaining recess. It is characterized by the formation of

[Invention of Claim 1]
In the container sealing structure according to claim 1, when the outer fitting side wall provided in one of the container and the lid and the inner fitting side wall provided in the other are fitted, the inner fitting side wall and the outer sealing hood wall are provided. The compression elastic portion provided on the outer fitting side wall is pushed into and closely contacts the U-shaped groove between the two. Here, the compression elastic portion is formed by folding back at least one annular flexible wall protruding obliquely from the outer side surface of the outer fitting side wall, so that it is simply the outer fitting side wall like the conventional compression elastic portion. The elasticity can be made higher than that of an annular flexible wall that only protrudes obliquely from the outer side surface. Thereby, the influence by the dispersion | variation in the dimension in the fitting part of a container and a cover body is suppressed, it can prevent that fitting resistance becomes large, and a container can be sealed easily with a cover body.

Further, in the container sealing structure of the present invention, the folded portion on the most distal end side of the compression elastic portion is arranged on the side farthest from the inner surface of the U-shaped groove portion, and the retaining hood wall is extended from the folded portion. Regardless of the wall thickness of the hood wall, the tip end side of the compression elastic portion can be made thinner than the folded portion, and the elasticity of the compression elastic portion can be increased also in this respect. The retaining hood wall has an annular locking recess on the inner surface, and the container can be sealed by locking the annular locking recess and the locking projection on the outer surface of the sealing hood wall. Since the hood wall is supported by the folded portion having a relatively high strength among the compression elastic portions, the sealing strength can be increased. Furthermore, the container can be easily opened by cutting the retaining hood wall from the cut along the annular locking recess .

The perspective view of the container and lid which concern on one Embodiment of this invention The perspective view of the state which assembled the container and the lid Partially broken perspective view of a state in which the container and the lid are assembled Side sectional view before assembling container and lid Side sectional view in the middle of assembling container and lid Side sectional view of the state in which the container and the lid are assembled Side cross-sectional view of container nesting Side cross-sectional view with the lids stacked Side sectional view of container and lid of second embodiment Side sectional view of container and lid of third embodiment Side sectional view of the container and lid of Modification 1 according to the present invention Side sectional view of the container and lid of Modification 2 according to the present invention Side sectional view of a conventional container sealing structure

[First Embodiment]
Hereinafter, an embodiment of the present invention will be described with reference to FIGS. The pack 100 shown in FIG. 1 includes a container 10 that is a resin molded product and a lid 40. The container 10 has a flat, generally cylindrical shape having a circular opening 10K on the upper surface. Further, the side wall of the container 10 is an outer fitting side wall 11 according to the present invention, and the outer fitting side wall 11 has a step portion 11D in the middle of the depth direction as shown in FIG. The bottom wall 16 side is smaller than the opening 10K side than the portion 11D. In addition, the bottom wall 16 has a shape in which the central portion is raised upward, and an annular pedestal ridge 17 is formed to protrude from a position near the outer edge of the bottom surface of the bottom wall 16.

  On the other hand, the lid body 40 includes a circular top plate wall 42 opposed to the bottom wall 16 in the vertical direction, and includes an inner fitting side wall 41 according to the present invention on the outer edge of the top plate wall 42. Then, the inner fitting side wall 41 is fitted inside the outer fitting side wall 11 of the container 10, and the opening 10 </ b> K of the container 10 is closed by the lid body 40. The top plate wall 42 also has a shape in which the central portion is raised upward, like the bottom wall 16.

  Now, as shown in FIG. 4, the lid 40 includes a sealing hood wall 45 that forms a U-shaped groove 46 between the lid 40 and the inner fitting side wall 41. The sealing hood wall 45 includes a hood back wall 43 projecting laterally from the upper end of the inner fitting side wall 41 and a hood tube wall 44 projecting downward from a position near the outer edge of the lower surface of the hood back wall 43. The U-shaped groove 46 is formed between the hood tube wall 44 and the inner fitting side wall 41.

  Specifically, the hood cylinder wall 44 protrudes larger than the inner fitting side wall 41 with respect to the hood inner wall 43, and the front end surface 44 </ b> T of the hood cylinder wall 44 is deeper than the front end face 41 </ b> T of the inner fitting side wall 41. It is arranged at a position away from the part wall 43. In addition, a guide surface 41S inclined at an angle of about 10 to 20 degrees with respect to the axial direction of the inner fitting side wall 41 is provided at a corner portion of the inner fitting side wall 41 on the U-shaped groove portion 46 side, and a hood cylinder portion A guide surface 44 </ b> S inclined at an angle of approximately 10 to 20 degrees with respect to the axial direction of the U-shaped groove 46 is also provided at the corner of the wall 44 on the U-shaped groove 46 side.

  Further, a locking projection 47 is formed so as to protrude over the entire circumferential direction at an intermediate position in the axial direction on the outer side surface of the hood tube portion wall 44. The locking projection 47 includes a locking surface 47A that rises at a right angle from the outer surface of the hood tube wall 44 on the hood back wall 43 side, while the hood tube wall 44 faces the hood back wall 43 on the opposite side. A slope 47B that gradually rises from the outer surface is provided. In addition, the flange 43F that protrudes to the side of the hood tube wall 44 of the hood back wall 43 has an outer edge corner on the upper surface side chamfered in an arc shape, while an outer edge corner on the lower surface side has an edge shape. Pointed.

  In addition, the connection part with the top-plate wall 42 among the inner side fitting side walls 41 is arrange | positioned in the position near the front end surface 41T in the axial direction of the inner side fitting side wall 41. As shown in FIG. The inner fitting side wall 41 is slightly thinner on the hood inner wall 43 side than the thickness on the tip surface 41T side than the connecting portion with the top plate wall 42.

  The container 10 includes a compression elastic portion 15 that is pushed into the U-shaped groove portion 46 of the lid body 40. The compression elastic portion 15 is formed by folding the annular flexible wall 14 folded back from the upper end portion of the outer fitting side wall 11 toward the outside diagonally downward and obliquely upward toward the outside. Thereby, the compression elastic part 15 has a V-shaped cross section independently, and when the compression elastic part 15 and the outer fitting side wall 11 are combined, it has an N-shaped cross section.

  Specifically, the annular flexible wall 14 slightly protrudes horizontally outward from the outer surface at the distal end portion of the outer fitting side wall 11, and then projects outward and obliquely downward at an angle of 15 to 30 degrees, for example. A folding portion 15A is provided at an intermediate position between the front end surface 11T and the step portion 11D in the side wall 11, and extends in a cylindrical shape vertically upward therefrom. Thereby, it has a structure provided with the 1st flexible cylinder part 12 extended from the front-end | tip part of the outer side fitting side wall 11 to the folding | returning part 15A, and the 2nd flexible cylinder part 13 extended to the front-end | tip from the folding | turning part 15A. Yes.

  Further, the distal end surface of the compression elastic portion 15 (that is, the distal end surface of the second flexible cylinder portion 13) is disposed at a position lower than the distal end surface 11 T of the outer fitting side wall 11. Further, the annular flexible wall 14 is slightly thicker than the outer fitting side wall 11 at a portion slightly protruding outward from the upper end portion of the outer fitting side wall 11, from which the first flexible cylinder portion is formed. 12 and the folded portion 15A have substantially the same thickness as that of the outer fitting side wall 11, and the remaining second flexible cylinder portion 13 has a thickness approximately half that of the outer fitting side wall 11.

  The container 10 is provided with a retaining hood wall 20 so as to cover the compression elastic portion 15 from the outside. The retaining hood wall 20 protrudes downward from the folded portion 15A of the compression elastic portion 15 and then is bent in a U shape and folded upward, and has a cylindrical portion 20C concentric with the outer fitting side wall 11. ing. The cylindrical portion 20 </ b> C of the retaining hood wall 20 is thicker than the outer fitting side wall 11, and the entire other retaining hood wall 20 has substantially the same thickness as the outer fitting side wall 11. Yes.

  An annular locking recess 21 is formed at a position facing the upper end portion of the second flexible cylinder portion 13 in the horizontal direction on the inner side surface of the retaining hood wall 20. The annular locking recess 21 has a locking surface 21A and an inclined surface 21B corresponding to the locking surface 47A and the inclined surface 47B of the locking projection 47, and has a substantially V-shaped groove shape. Note that the locking surface 21A is inclined such that the intersection with the inner surface of the cylindrical portion 20C is located above the intersection with the slope 21B. Thereby, the container 10 can be easily taken out from the resin mold.

  The front end surface 20T of the retaining hood wall 20 is positioned above the front end surface 11T of the outer fitting side wall 11. Further, the front end surface 20T is inclined at an angle of 5 to 10 degrees with respect to the horizontal direction so that the inner edge side corner is lower than the outer edge side corner at the tip of the retaining hood wall 20.

  As shown in FIG. 1, a notch 24 is formed at one location in the circumferential direction of the retaining hood wall 20 from the upper end of the cylindrical portion 20C to the annular locking recess 21 (FIG. 1 shows a bottom wall). Only a part of 16 is shown). And the opening operation piece 23 is extended from the opening edge of one side of the notch 24 among the retaining hood walls 20, and covers the notch 24 from the outside. Further, a pair of protective protruding walls 22, 22 protrude from both side portions of the retaining hood wall 20 directly below the notch 24. These protective protruding walls 22, 22 protrude outward from the opening operation piece 23 and prevent foreign matter from being caught on the opening operation piece 23.

  The description regarding the configuration of the container sealing structure in the pack 100 of the present embodiment has been described above. Next, the effect of the container sealing structure will be described. The pack 100 of this embodiment is used, for example, for packaging food. Prior to its use, the container 10 and the lid 40 are separated and prepared in a state where a plurality of them are stacked one on top of the other.

  Here, when a plurality of the lids 40 are stacked, as shown in FIG. 8, the front end surface 44T of the sealing hood wall 45 (specifically, the hood tube wall 44) in the upper lid 40 is the lower lid. The front end surface 41T of the inner fitting side wall 41 in the upper lid 40 is held away from the lower lid 40 in contact with the upper surface of the body 40 (specifically, the upper surface of the hood back wall 43). The Moreover, the outer fitting side wall 11 of the lowermost lid 40 in the stacked lid 40 group is in a state of floating from the upper surface of the lid mounting place provided in the food factory. These prevent foreign matter from adhering to the inner fitting side wall 41 disposed inside the container 10 and facilitate hygiene management.

  On the other hand, when a plurality of containers 10 are stacked, as shown in FIG. 7, a part of the upper container 10 is in a nesting state accommodated inside the lower container 10. At this time, the front end surface 11T of the outer fitting side wall 11 of the lower container 10 comes into contact with the stepped portion 11D of the upper container 10, and the compression elastic portions 15, 15 of the upper and lower containers 10, 10 are separated from each other. Is kept in the state. Thereby, the situation where these compression elastic parts 15 and 15 are pressed and damaged can be prevented. Further, when the containers 10 are stacked with the opening 10K facing downward, the tip end surface 20T of the retaining hood wall 20 in the lowermost container 10 comes into contact with the upper surface of the container mounting place provided in the food factory, so that the container The 10 outer fitting side walls 11 are in a state of floating from the upper surface of the container mounting place. This prevents foreign matter from adhering to the outer fitting side wall 11 relatively close to the inside of the container 10.

  Now, in the processing line of the food factory, the lid 40 is assembled to the container 10 after the food is stored in the container 10. Therefore, when the lid 40 is moved closer to the container 10 from above, the tip of the outer fitting side wall 11 is fitted into the guide surface 41S of the inner fitting side wall 41 as shown in FIG. In contact (ie, mating contact). When the lid 40 is pressed against the container 10, the inner fitting side wall 41 is centered with respect to the outer fitting side wall 11 by the guide of the guide surface 41 </ b> S, and the fitting is deepened. The cylindrical outer surface on the back side from the surface 41S and the cylindrical inner surface of the outer fitting side wall 11 are in contact with each other. Then, the distal end of the second flexible cylindrical portion 13 in the compression elastic portion 15 is fitted and brought into contact with the guide surface 44S of the hood cylindrical portion wall 44. When the container 10 is pressed against the lid body 40 in this state, the second flexible tube portion 13 is guided by the guide surface 41S and deforms so as to squeeze inward, and the first and second flexible tube portions 12, The entire compression elastic portion 15 is compressed and deformed so that the angle between the first flexible tube portion 12 and the outer fitting side wall 11 becomes smaller.

  Here, the compression elastic portion 15 is formed by folding the annular flexible wall 14 projecting obliquely laterally from the outer surface of the outer fitting side wall 11. The elasticity can be made higher than that of an annular flexible wall that protrudes obliquely from the side. In addition, since the second flexible cylindrical portion 13 of the compression elastic portion 15 has a thin-walled structure that is thinner than the outer fitting side wall 11, this point is also more elastic than the conventional one. By these, the influence by the dispersion | variation in the dimension in the fitting part of the container 10 and the cover body 40 is suppressed, it can prevent that fitting resistance becomes large, and the container 10 can be easily sealed with the cover body 40. Moreover, since the lid 40 and the container 10 are centered by the guidance of the fitting of the outer fitting side wall 11 and the inner fitting side wall 41, the second flexible cylinder portion 13 is connected to the hood cylinder wall 44. Can be smoothly fitted inside. That is, the compression elastic part 15 can be smoothly pushed into the U-shaped groove part 46.

  When the compression elastic part 15 is pushed into the back part of the U-shaped groove part 46, as shown in FIG. 6, the front-end | tip of the retaining hood wall 20 contacts and positions to the flange part 43F. Further, in the process of pushing the compression elastic portion 15 into the back of the U-shaped groove portion 46, the leading end of the retaining hood wall 20 rides on the slope 47B of the locking projection 47, and the leading end of the retaining hood wall 20 is placed on the flange portion 43F. At the contacted position, the locking projection 47 is locked to the annular locking recess 21 of the retaining hood wall 20 and the lid 40 is prevented from coming off the container 10. By the above, the assembly | attachment operation | work of the cover body 40 with respect to the container 10 is completed, and the container 10 will be in the state sealed with the cover body 40 (refer FIG. 2).

  In order to open the pack 100, the hood inner wall 43 is pulled to remove the upper portion of the retaining hood wall 20 from the annular locking recess 21. Then, since the flange portion 43F is exposed in a state protruding sideways, the lid body 40 may be opened by placing a finger on the lower edge portion of the flange portion 43F.

  As described above, according to the container sealing structure of the present embodiment, the elasticity of the compression elastic portion 15 is higher than before, and the fitting resistance is reduced by suppressing the influence of the dimensional variation in the fitting portion of the container 10 and the lid body 40. The increase in size can be prevented and the container 10 can be easily sealed. Further, since the retaining hood wall 20 extends from the folded portion 15A of the compression elastic portion 15, the distal end side of the folded portion 15A of the compression elastic portion 15 is independent of the thickness of the retaining hood wall 20. The wall thickness can be reduced, and the elasticity of the compression elastic part 15 can be increased also in this respect. Further, since the retaining hood wall 20 for sealing the container 10 and the like is supported by the folded portion 15A having a relatively high strength in the compression elastic portion 15, the sealing strength can be increased.

[Second Embodiment]
This embodiment is shown in FIG. 9, and only the structure of the compression elastic part 15V is different from the compression elastic part 15 of the first embodiment. Only the configuration different from the first embodiment will be described below. The compression elastic part 15V provided in the container 10V of this embodiment is formed by folding the annular flexible wall 30 folded outward and obliquely downward from the outer fitting side wall 11 three times outward. Specifically, the annular flexible wall 30 protrudes obliquely outward from the outer surface at the distal end portion of the outer fitting side wall 11, and the first folded portion is located at an intermediate position between the distal end surface 11T and the stepped portion 11D in the outer fitting sidewall 11. 30A, which is folded back obliquely upward from there and extends to a position slightly lower than the upper end of the outer fitting side wall 11, and is provided with a second folded portion 30B. Then, the second folded portion 30B is folded obliquely outward and downward to extend to an intermediate position between the front end surface 11T and the stepped portion 11D in the outer fitting side wall 11, and a third folded portion 30C is provided there. The third folded portion 30C is disposed at a position slightly lower than the first folded portion 30A, is folded vertically upward therefrom, and extends to an intermediate position between the upper end portion of the outer fitting side wall 11 and the second folded portion 30B. Yes. As a result, the compression elastic portion 15V of the present embodiment has the first flexible tube portion 31 on the proximal side from the first folded portion 30A and the second flexible portion between the first and second folded portions 30A, 30B. The structure provided with the cylinder part 32, the 3rd flexible cylinder part 33 between the 2nd and 3rd folding | turning parts 30B and 30C, and the 4th flexible cylinder part 34 extended to the front-end | tip from the 3rd folding | turning part 30C. It has become.

  The third folded portion 30C on the most distal end side of the compression elastic portion 15V is located on the side away from the inner surface of the U-shaped groove portion 46, and the retaining hood wall 20 extends from the third folded portion 30C. ing. Also according to the configuration of the present embodiment, the elasticity of the compression elastic portion 15V becomes higher than before, and the container 10 can be easily sealed.

[Third Embodiment]
This embodiment is shown in FIG. 10 and is different from the first embodiment in that a U-shaped groove portion 46X is provided on the container 10X side, while a compression elastic portion 15X is provided on the lid body 40X side. Only the configuration different from the first embodiment will be described below.

  The lid body 40X of the present embodiment includes an outer fitting side wall 41X according to the present invention protruding downward from the outer edge portion of the top plate wall 42X. The compression elastic portion 15X is formed by folding the annular flexible wall 14X folded obliquely outward and upward from the front end of the outer fitting side wall 41X in the middle and obliquely outward and downward, and the first and second flexible cylinder portions 12 , 13. Further, a retaining hood wall 20X extends from the folded portion 15A of the compression elastic portion 15X.

  On the other hand, the side wall of the container 10X is the inner fitting side wall 11X according to the present invention, and the hood inner wall 43 of the sealing hood wall 45X is located on the inner fitting side wall 11X from a position near the upper side of the step portion 11D. The hood tube wall 44 of the sealing hood wall 45X protrudes from the side and closes to the outer edge of the upper surface of the hood back wall 43. A U-shaped groove portion 46X is formed between the hood tube portion wall 44 and the inner fitting side wall 11X. The configuration of this embodiment also has the same effect as the first embodiment.

[Other Embodiments]
The present invention is not limited to the above-described embodiment. For example, the embodiments described below are also included in the technical scope of the present invention, and various other than the following can be made without departing from the scope of the invention. It can be changed and implemented.

(1) The compression elastic portion 15 of the container 10 of the first embodiment is integrally formed with a retaining hood wall 20 for sealing the container 10 with the lid 40, as shown in FIG. As in the case of the container 10 </ b> W, the configuration may be such that only the compression elastic portion 15 </ b> W is provided without the retaining hood wall. In such a configuration, for example, the lid 40 may be fixed to the container 10 with a sealing tape separately from the container 10W and the lid 40 and sealed.

(2) In the container 10 of the first embodiment, the annular flexible wall 14 constituting the compression elastic portion 15 has a structure that is folded obliquely downward from the tip of the outer fitting side wall 11, but FIG. Like the compression elastic part 15Y of the container 10Y shown, the annular flexible wall 37 projects obliquely upward from the middle position in the vertical direction of the outer fitting side wall 11, and the annular flexible wall 37 is obliquely lowered or The first and second flexible tube portions 35 and 36 may be folded vertically downward.

10, 10V, 10X, 10Y, 10W Container 10K Opening 11, 41X Outer mating side wall 11D Stepped portion 11T Tip surface 11X, 41 Inner mating side wall 14, 14X, 30, 37 Annular flexible wall 15, 15V, 15W, 15X , 15Y Compression elastic part 15A Folding part 20, 20X Stopping hood wall 21 Annular locking recess 40, 40X Lid 45, 45X Sealing hood wall 46, 46X U-shaped groove part 47 Locking protrusion

Claims (1)

A U-shaped groove is formed between the inner fitting side wall and the inner fitting side wall so as to cover the outer side surface of the inner fitting side wall that is fitted on the inner side of the pair of side walls that are provided on the container and the lid. A sealing hood wall, and a compression elastic portion that protrudes laterally from the outer side surface of the outer fitting side wall that is fitted to the outside of the pair of side walls, and is pressed into the U-shaped groove portion to be in close contact, In a container sealing structure capable of sealing the opening of the container,
The compression elastic part is formed by folding back at least one or more annular flexible walls protruding obliquely from the outer surface of the outer fitting side wall,
The folded portion on the most distal end side of the compression elastic portion is disposed on the side away from the inner surface of the U-shaped groove portion, and a retaining hood wall is extended from the folded portion to fit outside the sealing hood wall. Possible,
While providing a locking projection on the outer side surface of the sealing hood wall, an annular locking recess for locking the locking projection is provided on the inner side surface of the locking hood wall, and further from the tip of the locking hood wall A container sealing structure in which a cut is formed over the annular locking recess .

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