JP2018002162A - Cover - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cover which can be easily opened.SOLUTION: In a cover, a middle cover unevenly deforming according to pressure in a container is disposed in a top plate 14 inner surface of a cover body 7. The cover body is equipped with a side wall 16, an inner side wall 18 positioned on the inside of the side wall, a clearance portion 21 formed between the side wall and the inner side wall, and a wall portion 20 extended from the side wall and screwed with a mouth portion of the container. The middle cover is equipped with a deforming portion 8a unevenly deforming, a fitting wall portion 8b formed around the deforming portion and fitted with the clearance portion, and a peripheral edge portion 8d formed around the deforming portion. Furthermore, on an inner peripheral surface of the wall portion, a projection portion 20b locking the peripheral edge portion so as not to remove the peripheral edge portion from the cover body is formed.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a container lid for sealing a container for storing contents such as cream.

  Conventionally, in order to sterilize the contents, a method is known in which a PET bottle or the like is filled with the contents at a high temperature, and a cap is screwed onto the bottle mouth and sealed. However, in this case, when the contents are cooled to room temperature after a lapse of time, the inside of the container is in a negative pressure state, and the shape of the cap top plate is deformed into a concave shape as shown in FIG. There were problems such as being unable to maintain.

  In order to solve such a problem, a cap in which a disk-shaped inner part is arranged inside the top plate is known (for example, see Patent Document 1). In the container using this cap, when the contents filled at high temperature are cooled to normal temperature, the inner part is deformed into a concave shape instead of the cap top plate, so that the airtightness in the container is maintained. Can do.

JP 2000-103459 A

However, in the above-described cap, when the decompression force in the container generated by cooling the contents is high, the inner part may come off the cap and remain attached to the bottle mouth when the cap is opened. It was. In this case, since the consumer cannot touch the contents without removing the inner part attached to the bottle mouth portion, the cap cannot be easily opened.
An object of the present invention is to provide a lid that can be easily opened.

The lid of the present invention
A lid in which an inner lid that deforms into irregularities according to the pressure in the container is disposed on the inner surface of the top plate of the lid body,
The lid body is
Side walls,
An inner sidewall located within the sidewall;
A gap formed between the side wall and the inner side wall;
A wall portion extending from the side wall and screwed into the mouth portion of the container;
A deformed portion that deforms into irregularities;
A fitting wall formed around the deformed portion and fitted into the gap;
A peripheral edge formed around the deformable portion,
Furthermore, the inner peripheral surface of the wall portion is formed with a projection portion that locks the peripheral edge portion so that the peripheral edge portion does not come off from the lid body.

  Thereby, even when the inside of the container is in a negative pressure state, the inner lid is not detached from the lid body and left on the container body, so that the lid can be easily opened. In addition, since the decompression force can be reduced by providing the inner lid with the deforming portion, the lid can be opened with a low torque.

The lid of the present invention is
The deforming portion includes a thin portion with a small thickness in the vicinity of the peripheral portion, and has a shape in which the thickness becomes thicker at a position closer to a substantially central portion.

  As a result, when the housing space is in a negative pressure state, the deformed portion can be reversed with the thin portion as a fulcrum, and the entire inner lid including the peripheral portion is held by the deformed portion and the recessed peripheral portion is not inclined. . Therefore, the peripheral edge portion can be reliably locked by the protruding portion, and the inner lid can be prevented from being detached from the lid body when the plug is opened.

The lid of the present invention is
The fitting wall portion has substantially the same thickness as the substantially central portion of the deformable portion, and the cross-section of the fitting wall portion has a straight shape without a step.

  As a result, when the fitting wall portion is inclined inward due to the influence of the deformed portion that is inverted, the fitting wall portion comes into contact with the inner side wall and a frictional force is generated between the two. It is reliably prevented from coming out of the part.

The lid of the present invention is
The deforming part has a step between the thin part and the peripheral part.
Thereby, while improving the function as a fulcrum of a thin part, it can prevent more reliably that a peripheral part inclines.

The lid of the present invention is
A plurality of the fitting wall portions are formed around the deformable portion.
Thereby, it is possible to make the lid easier to assemble than when one fitting wall portion is provided on the entire circumference of the deformable portion.

  According to the invention of the present invention, a lid that can be easily opened can be provided.

It is a perspective view which shows the container of the state which mounted | wore the cover which concerns on embodiment. It is an exploded view of the container concerning an embodiment. It is sectional drawing which shows the state which mounted | wore the container main body with which the content was filled with the cover which concerns on embodiment at high temperature. It is a principal part expanded sectional view in the state where the lid concerning an embodiment was equipped in the container main part. It is sectional drawing which shows the state by which the content was cooled to normal temperature after mounting | wearing the container main body with the cover which concerns on embodiment. In the conventional cap, it is a figure which shows a mode that the shape of a cap top plate deform | transforms into a concave shape, when the contents in a container are cooled to normal temperature.

  Hereinafter, a lid according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing a container with a lid according to the embodiment, and FIG. 2 is an exploded view of the container according to the embodiment. 3 is a cross-sectional view of the container with the lid according to the embodiment attached to the container body, and FIG. 4 is an enlarged cross-sectional view of the main part of the lid shown in the circle of FIG. is there.

As illustrated in FIGS. 1 to 4, the container 2 includes a container body 4, a lid body 7, and an inner lid 8.
The container body 4 is a bottomed, substantially cylindrical part made of a resin such as polypropylene. Inside the container body 4, for example, a storage space 10 for containing contents such as creamy cosmetics and hair styling agents is formed. On the upper side of the container body 4, as shown in FIGS. A mouth portion 12 in which a plurality of screw threads 12a are formed is provided.

  The lid main body 7 is a component having a convex cross section formed of a resin such as polypropylene, which is the same material as the container main body 4. As shown in FIG. 4, the top plate 14, the side wall 16, the inner side wall 18, and the wall portion 20 and a stepped portion 22 are provided. The top plate 14 is formed in a disk shape and forms the top of the lid body 7 having a convex cross section. The peripheral edge of the top plate 14 is bent and extends downward in the figure, and a side wall 16 is formed in a portion extending downward. In addition, an inner side wall 18 extends downward from the inner side of the side wall 16 without being bent from the peripheral edge of the top plate 14, and between the side wall 16 and the inner side wall 18, a fitting wall portion of the inner lid 8. A gap portion 21 into which 8b is fitted is formed.

  Further, a step portion 22 is formed at the lower end of the side wall 16, and a wall portion 20 having a diameter larger than that of the side wall 16 extends from the step portion 22 toward the lower side of the figure. On the inner peripheral surface of the wall portion 20, a plurality of screw threads 20 a that are screwed with the screw threads 12 a of the mouth portion 12 of the container body 4, and a protrusion for maintaining the state in which the inner lid 8 is attached to the lid body 7. A portion 20b is formed.

  The inner lid 8 has a disk shape made of an elastic material such as a thermoplastic elastomer. A film-like deformed portion 8a that is deformed into a concave shape or a convex shape according to the pressure in the accommodation space 10 is formed at the center portion of the inner lid 8, and as shown in FIG. 2 around the deformable portion 8a, Four fitting wall portions 8b to be fitted into the gap portion 21 of the lid body 7 are formed at predetermined intervals. A step 8c having an L-shaped cross section is provided around the deformed portion 8a, and an annular peripheral portion 8d is formed around the step 8c. In addition, the deformation | transformation part 8a is provided with the thin part 8f with thin thickness in the vicinity of the peripheral part 8d, and has a shape where thickness becomes thick, so that the position near a substantially central part. The wall thickness of the fitting wall portion 8b is substantially the same as the substantially central portion of the deformable portion 8a, and the cross section of the fitting wall portion 8b has a straight shape with no step.

  Next, the flow from when the inner lid 8 is attached to the lid body 7 to when the lid 6 is attached to the container body 4 and the contents reach room temperature will be briefly described. First, when attaching the inner lid 8 to the inside of the lid body 7, the fitting wall portion 8 b is fitted into the gap portion 21 of the lid body 7, and the outer edge of the peripheral edge portion 8 d is connected to the step portion 22 of the lid body 7. It is sandwiched between the protrusions 20b. Thereby, the inner lid 8 is attached to the lid body 7 so as not to be easily detached from the lid body 7.

  Next, the container body 4 is filled with high-temperature contents, and the lid 6 to which the inner lid 8 is attached is attached to the container body 4. As shown in FIG. 3, the initial deformed portion 8 a has a shape in which the inner lid 8 projects in a dome shape toward the top plate 14 side. When the contents are cooled to room temperature after a lapse of time and the accommodation space 10 is depressurized, as shown in FIG. 5, the deforming portion 8 a reverses around the thin portion 8 f as a fulcrum, and the container body 4. Recessed on the side and curved downward in the figure.

  When the consumer opens the lid 6, the inner lid 8 comes into close contact with the mouth portion 12 by the decompression force of the accommodation space 10, so that the peripheral portion 8 d is detached from the upper end portion of the mouth portion 12 of the container body 4. There is a concern that only the inner lid 8 is left on the container body 4 while adhering to the container body 4. However, in the inner lid 8, the fitting wall portion 8b is fitted into the gap portion 21 of the lid body 7, the peripheral edge portion 8d is locked by the protruding portion 20b, and the peripheral edge portion 8d is the stepped portion 22 and the protruding portion 20b. Therefore, the inner lid 8 does not come off the lid body 7.

  According to the invention according to this embodiment, even when the accommodating space 10 is in a negative pressure state, the inner lid 8 is not detached from the lid body 7 and left on the container body 4. Can be opened.

  Further, if the inner lid 8 is fixed to the lid body 7, there is a problem that the torque when the lid 6 is opened increases when the accommodation space 10 is in a negative pressure state. The lid 6 can be opened with a low torque by attaching the film-shaped deformable portion 8a capable of relaxing the decompression force of the lid body 7 to the inside of the lid body 7.

  Further, the deformed portion 8a of the inner lid 8 includes a thin portion 8f in the vicinity of the peripheral portion 8d, and has a shape in which the thickness is thicker toward the substantially central portion. In this case, the thin portion 8f can be reversed as a fulcrum. As a result, the entire inner lid 8 including the peripheral edge portion 8d is recessed by the deformed portion 8a and the peripheral edge portion 8d is not inclined. Therefore, the peripheral edge portion 8d can be reliably held between the stepped portion 22 and the protruding portion 20b, and the inner lid 8 can be prevented from being detached from the lid body 7. In addition, by providing the level | step difference 8c between the thin part 8f and the peripheral part 8d, while being able to improve the function as a fulcrum of the thin part 8f, it can prevent more reliably that the peripheral part 8d inclines. Moreover, since the peripheral part 8d does not deform | transform, the airtightness between the opening parts 12 of the container main body 4 can also be ensured.

  Furthermore, since the thickness of the fitting wall portion 8b is substantially the same as the substantially central portion of the deformable portion 8a and there is no step in the cross section of the fitting wall portion 8b, the deformable portion 8a is inverted with the thin wall portion 8f as a fulcrum. In this case, the fitting wall portion 8b is inclined inward under the influence of the deformation of the deformation portion 8a. As a result, the fitting wall 8b abuts against the inner side wall 18 and a frictional force is generated between them, so that the fitting wall 8b is reliably prevented from coming out of the gap 21.

  In the above-described embodiment, the case where the four fitting wall portions 8b are formed around the deformable portion 8a at predetermined intervals is described as an example. The number is not necessarily limited to four. For example, one fitting wall portion 8b may be provided on the entire circumference of the deformable portion 8a, or two fitting wall portions 8b may be provided. However, considering the ease of assembly and stability, the number of the fitting wall portions 8b is preferably three or four. That is, by forming the fitting wall portions to be about three or four, the inner lid can be fixed to the lid body in a stable state without hindering the ease of assembly.

  In the above-described embodiment, the container body does not necessarily have a substantially circular shape as long as it is cylindrical, and the lid body 7 does not have to have a convex cross section. The inner lid 8 also does not need to have a strict disc shape.

2 Container 4 Container body 6 Lid 7 Lid body 8 Middle lid 8a Deformation part 8b Fitting wall part 8c Step 8d Peripheral part 8f Thin part 10 Accommodating space 12 Mouth part 12a Screw thread 14 Top plate 16 Side wall 18 Internal side wall 20 Wall part 20a Thread 20b Protruding part 21 Gap part 22 Step part

Claims (5)

A lid in which an inner lid that deforms into irregularities according to the pressure in the container is disposed on the inner surface of the top plate of the lid body,
The lid body is
Side walls,
An inner sidewall located within the sidewall;
A gap formed between the side wall and the inner side wall;
A wall extending from the side wall and screwed into the mouth of the container;
A deformed portion that deforms into irregularities;
A fitting wall formed around the deformed portion and fitted into the gap;
A peripheral edge formed around the deformable portion,
Furthermore, the lid | cover with which the protrusion part which latches the said peripheral part is formed in the internal peripheral surface of the said wall part so that the said peripheral part may not remove | deviate from the said lid body.   2. The lid according to claim 1, wherein the deformable portion includes a thin-walled portion having a small thickness in the vicinity of the peripheral edge portion, and has a shape in which the thickness becomes thicker at a position closer to a substantially central portion.   The fitting wall portion has a thickness substantially equal to a substantially central portion of the deformable portion, and a cross section of the fitting wall portion has a straight shape without a step. The lid according to 1 or 2.   The said deformation | transformation part has a level | step difference between the said thin part and the said peripheral part, The lid | cover as described in any one of Claims 1-3 characterized by the above-mentioned.   The lid according to any one of claims 1 to 4, wherein a plurality of the fitting wall portions are formed around the deformable portion.

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