JP2003170952A - Capped container - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a capped container that is capable of easily obtaining, without providing a packing with a special structure, the function of eliminating a gas generated or contents together with a gas generated. <P>SOLUTION: The capped container 10 comprises a cap 16 that is screwed onto the neck 14 of a container main body 11 via the packing 17. Pressing ribs 19 projecting down are formed on the inside top face 18 of the cap 16. The pressing ribs 19 are disposed on the inside top face 18 such that when the cap 16 is fitted on, the packing 17 is compressed between the lower ends of the pressing ribs 19 and the upper end of the neck 14 and the packing 17 at least partly has a free portion 20, in which only the upper end of the neck 14 contacts the underside of the packing 17, along the upper end of the neck 14. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cap-equipped container and a cap in which a cap is screwed on a neck portion of a container body with a packing interposed.

[0002]

2. Description of the Related Art A container for containing, for example, cosmetics, chemicals, paints, foods, etc., as gas-generating contents has a cap when the contents are enclosed by a cap attached to the neck. The gas generated from an object may expand and deform or damage the container.
In order to prevent such deformation and damage, it is necessary to provide a degassing mechanism in the cap or the like to eliminate the generated gas, but it is possible not only to let the gas pass but also to prevent the contents from flowing out. If it does not have such a mechanism, the contents may leak when the container is turned over. Therefore, for example, Japanese Patent Application Laid-Open No. 5-270559 discloses a container with a cap capable of eliminating the gas generated while preventing the content from flowing out.

The container described in JP-A-5-270559 has a gas passage hole at the center of the upper part of the cap, and covers the opening of the neck portion of the container body while sandwiching a packing-like gas releasing mechanism to put the cap on the neck portion. It is the one that is installed. The degassing mechanism includes a breathable sheet on the upper surface side and a valve body made of an elastic film on the lower surface side, which are laminated with an annular spacer interposed therebetween, so that gas can be eliminated through the breathable sheet, and It prevents the contents from flowing out.

However, according to the container described in Japanese Unexamined Patent Publication No. 5-270559, the packing sandwiched between the inner ceiling surface of the cap and the neck of the container body has a function as a degassing mechanism. Since it is necessary to provide a special and complicated structure, the manufacturing process becomes complicated and the cost increases as the number of parts increases. Further, particularly when the foamable contents are stored, the gas generated while the contents are caught passes through the breathable sheet, so that the contents adhere to the breathable sheet and clogging occurs. It will occur and impair the ventilation function.

The present invention has a special structure for the packing, which does not leak liquid during normal storage or distribution, and which eliminates the generated gas or the generated gas and the contents when the internal pressure exceeds a certain level. It can be easily obtained without providing it, and can prevent the container from bursting even when the foamable contents are contained and the internal pressure rises excessively, and the contents can be effectively prevented from scattering around. The purpose is to provide a container with a cap and a cap.

[0006]

DISCLOSURE OF THE INVENTION The present invention is a container with a cap, in which a cap is screwed and mounted with a packing interposed in the neck of a container body, and the cap is projected downward on the inner ceiling surface. A pressing rib is provided to clamp the packing between the lower end of the pressing rib and the upper end of the neck when the cap is attached, and the packing contacts only the upper end of the neck from the lower surface side of the packing. The above object is achieved by providing a container with a cap in which the pressing rib is arranged on the inner ceiling surface so as to have a free portion at least at a part along the upper end of the neck portion.

Further, the present invention is a cap screw-fitted to a neck portion of a container body of the container with a cap, wherein a pressing rib protruding downward from an inner ceiling surface is provided,
At the time of mounting on the neck portion, the packing is sandwiched between the lower end of the pressing rib and the upper end of the neck portion, and the packing has a free portion where only the upper end of the neck portion abuts from the lower surface side of the packing. The above object is achieved by providing a cap in which the pressing rib is arranged on the inner ceiling surface so as to be provided on at least a part along the upper end.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION The first preferred embodiment of the present invention shown in FIG.
The container 10 with a cap according to the embodiment is a container that stores, for example, a hair dye as a content that generates a gas such as oxygen, and a container body 11 of the container has flexibility and is made of, for example, a polyethylene and has a substantially cylindrical shape. The container is a double container including an outer container 12 and a polystyrene inner bag 13 that is mounted inside the outer container 12 to accommodate a hair dye. When a comb-like discharge nozzle or the like is attached to the neck portion 14 of the container body 11 and the hair dye is used, the hair dye can be discharged by grasping the outer container 13 by hand and deforming it by pressing. Moreover, when the pressed state is released, the outer container 12 can be restored to its original substantially cylindrical shape while sending air into the space 15 between the outer container 12 and the inner bag 13, which is a so-called laminated peeling container. It has a function.

On the other hand, the hair dye to be contained is obtained, for example, by adding and mixing the second agent contained in another container to the first agent previously contained in the container body 11.
Mixing the first agent and the second agent will generate a gas in a foamed state. In addition, such mixing of the first agent and the second agent,
It is performed with the cap 16 screwed onto the neck portion 14 of the container body 11. Furthermore, when the hair dye remaining in the container body 11 is stored or discarded, the cap 16 is screwed onto the neck portion 14 of the container body 11. The container 10 with a cap of the first embodiment is such a cap 1
Even when a hair coloring agent, which is a gas-generating content, is stored in the container 10 equipped with 6, the generated gas or the like is effectively eliminated to prevent an excessive increase in internal pressure, and It is adopted so as to avoid damage and deformation.

The container 10 with a cap according to the first embodiment is a container in which the cap 16 is screwed and attached to the neck portion 14 of the container body 11 with the packing 17 interposed therebetween. A pressing rib 19 projecting downward is provided at 18 so that the packing 17 is sandwiched between the lower end of the pressing rib 19 and the upper end of the neck portion 14 when the cap 16 is mounted, and the packing 17 makes the upper end of the neck portion 14 Only the free portion 2 in which only the lower surface of the packing 17 abuts
A pressing rib 19 is arranged on the inner ceiling surface 18 so as to have 0 (see FIGS. 3 and 4) on at least a portion along the upper end of the neck portion 14.

As shown in FIGS. 2 (a) and 2 (b), the cap 16 is, for example, a plastic molded product formed by injection molding, has a circular drum shape whose lower surface side is open, and has an inner periphery thereof. A thread 22 for internal threads is formed on the surface, and the thread is mounted on the neck portion 14 of the container body 11 having threads 23 for external threads formed on the outer peripheral surface. Also cap 16
The pressing ribs 19 are integrally formed at four locations on the inner ceiling surface 18 and project downward from the inner ceiling surface 18.

The pressing rib 19 is a protrusion having a substantially isosceles trapezoidal planar shape in which the inner side surface and the outer side surface are curved surfaces, and protrudes vertically downward from the inner ceiling surface 18 and mutually in the circumferential direction. They are provided at four places at equal angular pitches of 90 degrees at intervals. Also, each pressing rib 19
Is disposed on the inner ceiling surface 18 such that the outer edge portion of the cap 16 is located directly above the annular upper end of the neck portion 14 when the cap 16 is attached to the neck portion 14 of the container body 11. (See FIG. 3), each pressing rib 19 has a neck portion 1
4 and the lower end of the pressing rib 19 are protruded downward with a protrusion length such that a gap corresponding to the thickness of the packing 17 or a gap slightly smaller than this is maintained (see FIG. 1). ).

Therefore, according to the first embodiment of the present invention, when the cap 16 is screwed and attached to the neck portion 14 of the container body 11 with the packing 17 interposed, the packing 17 is pressed against the pressing rib 19 as shown in FIG. The packing 17 is firmly sandwiched between the neck 14 and the neck 14, and the packing 17 has a ring-shaped portion along the upper end of the neck 14 as shown in FIG.
A free portion 20 in which only the upper end of the abutment contacts from the lower surface side of the packing 17, and a fixed portion 21 in which the upper end of the neck portion 14 abuts from the lower surface side of the packing 17 and the lower end of the pressing rib 19 abuts from the upper surface side of the packing 17. Will have.

The packing 17 is a disk-shaped flat plate member made of polyolefin, silicone rubber or the like, and various packings generally used in conventional containers with caps can be used without special processing. it can. The packing 17 has a thickness of about 0.5 to 3 mm, has elasticity capable of being deformed so as to be warped under a load in the bending direction, and can be easily restored to the original flat disk shape. It has rigidity (shape retention).

On the inner peripheral surface of the cap 16, locking ribs 24 projecting inward are provided at a height position separated from the lower ends of the pressing ribs 19 by the thickness of the packing 17 in the circumferential direction. The locking ribs 24 are provided at four locations.
By locking the peripheral edge portion of the packing 17 on the lower surface side, the packing 17 can be attached so as not to fall off from the inside of the cap 16.

According to the container 10 with a cap of the first embodiment, the first agent and the second agent are mixed with each other only by making a simple improvement such that the pressing rib 19 is integrally formed on the cap 16. After that, it becomes possible to smoothly avoid an increase in internal pressure due to the generated gas. That is, when the amount of generated gas is small and the internal pressure of the container body 11 is not so high after the cap 16 is attached to the neck portion 14 of the container body 11, the packing 17 includes the pressing ribs 19 as shown in FIG. It is sandwiched between the lower end of the free end 20 and the upper end of the neck portion 14, and the peripheral edge portion on the lower surface side is free part 20 and fixed part 21.
It makes contact with the upper end of the neck portion 14 in close contact over the entire circumference without distinction. As a result, the upper end opening of the neck portion 14 is covered with the packing 17, and the hair dye is sealed in the container body 11 and does not flow out of the container body 11.

On the other hand, when the amount of generated gas is increased and the internal pressure of the container body 11 is increased to a pressure equal to or higher than a predetermined pressure, as shown in FIG.
The free portion 20 bends so as to warp upward in response to the pressure from, and a gap is formed between the free portion 20 and the upper end of the neck portion 14. Therefore, the gas generated through this gap is smoothly removed. It will be possible. This makes it possible to effectively avoid damage or deformation of the capped container 10. It should be noted that FIG. 4 is displayed with FIG. 1 rotated 45 degrees in the circumferential direction.

When the pressure inside the container body 11 is reduced due to the elimination of the gas, the packing 17 is naturally restored from the bent state to the original flat shape, and abuts on the upper end of the neck portion 14, whereby The hair dye is again enclosed in the main body 11.

Further, according to this embodiment, the contained hair dye has a foaming property, and gas is generated in a state in which the hair dye is caught, but the generated gas is breathable. Since it is eliminated through a gap of a considerable size generated between the packing 17 and the upper end of the neck portion 14 without passing through the sheet, it is easy to cause clogging due to the hair dye entrapped. It becomes possible to avoid it.

FIG. 5A shows a container 30 with a cap according to a second embodiment of the present invention. According to the second embodiment, the inner pressing surface 32 of the cap 31 is provided with four outer pressing ribs 33 having a substantially isosceles trapezoidal planar shape as shown in FIG. 5B. In addition, a central pressing rib 34 having a circular planar shape is provided at one place in the central portion of the area surrounded by these outer pressing ribs 33. Further, as shown in FIG. 6, when the cap 31 is mounted on the neck portion 14 of the container body 11, each outer pressing rib 33 is positioned such that the outer edge portion thereof overlaps with the portion directly above the annular upper end of the neck portion 13. The central pressing rib 34 is arranged on the inner ceiling surface 32 so as to be located at the center of the upper end opening of the neck portion 14. Further, the outer pressing rib 33 and the central pressing rib 34 maintain a gap corresponding to the thickness of the packing 17 or a gap slightly smaller than this between the upper end of the neck portion 14 and the lower ends of these pressing ribs 33, 34. It projects downward with such a protruding length (see FIG. 5A). Then, in the packing 17, in the annular portion along the upper end of the neck portion 14, only the upper end of the neck portion 14 abuts from the lower surface side of the packing 17, and the upper end of the neck portion 14 contacts from the lower surface side of the packing 17. The lower end of the outer pressing rib 33 is in contact with the fixing portion 36 in contact with the packing 17 from the upper surface side.

Further, according to the second embodiment, the thread 22 for internal thread on the inner peripheral surface of the cap 31 and the thread 23 for external thread on the outer peripheral surface of the neck portion 14 of the container body 11 are crossed in the vertical direction, A cutout groove 37 is formed in a lower portion of the free portion 35 when the cap 31 is attached.

According to the container 30 with a cap of the second embodiment, when the internal pressure of the container body 11 is not so high, the packing 17 is in close contact with the upper end of the neck portion 14 over the entire circumference. At the same time, when the internal pressure of the container body 11 becomes high, the packing 17 is bent so as to warp upward in the free portion 35, and the same effect as that of the capped container 10 of the first embodiment can be obtained. become.

Further, according to the second embodiment, in the female screw thread 22 of the cap 31 and the male screw thread 23 of the neck portion 14, a cutout groove 37 is formed in a lower portion of the free portion 35. Therefore, the gas in the state in which the hair coloring agent is foamed and the hair dye is caught is cut out from the gap in the free portion 35 by the groove 37.
It becomes possible to remove smoothly from the outside of the container 30 without causing clogging.

FIG. 7 (a) shows a container 40 with a cap according to a third embodiment of the present invention. According to the third embodiment, as shown in FIG. 7B, the inner ceiling surface 42 of the cap 41 is provided with one drum-shaped pressing rib 43 having a circular planar shape in the central portion. . Also,
As shown in FIG. 8, the drum-shaped pressing rib 43 is located concentrically with the annular upper end of the neck portion 14 when the cap 41 is attached to the neck portion 14 of the container body 11, and the upper end of the neck portion 14 is also attached. Is arranged on the inner ceiling surface 42 so as to be located inside the upper end opening with a space. Further, the drum-shaped pressing rib 43 projects such that a gap corresponding to the thickness of the packing 17 or a gap slightly smaller than the gap is held between the upper end of the neck portion 14 and the lower end of the drum-shaped pressing rib 43. It projects downward in length (see FIG. 7 (a)). The packing 17 does not have a fixing portion that is simultaneously sandwiched from above and below, and only the upper end of the neck portion 14 is in contact with the lower surface side of the packing 17 over the entire circumference along the annular upper end of the neck portion 14. It has a section 45.

Also, according to the container 40 with a cap of the third embodiment, when the internal pressure of the container body 11 is not so high, the packing 17 is brought into close contact with the upper end of the neck portion 14 over the entire circumference. At the same time, when the internal pressure of the container body 11 becomes high, the packing 17 is bent so as to warp upward in the free portion 45, and the same effect as that of the capped container 10 of the first embodiment described above can be obtained. Become.

FIG. 9 (a) shows a container 50 with a cap according to the fourth embodiment of the present invention. According to the fourth embodiment, the cap 51 is integrally provided with the nozzle portion 61 which further protrudes upward in a conical shape from the center of the ceiling portion 60 of the cap 51, and the inner ceiling surface 52 has the nozzle portion 61 shown in FIG.
As shown in (b), the pressing ribs 53 having a substantially isosceles trapezoidal planar shape are provided at four positions. Further, according to the fourth embodiment, as shown in FIGS.
The packing 57 is a flat plate member in the shape of an annular band with an opening in the center, and is arranged concentrically with the nozzle portion 61 and between the inner peripheral surface of the cap 51 and the inner protruding wall 62 of the nozzle portion 61. It is attached to the ring-shaped space of.
When the container 50 is not used, the nozzle cap is separately attached to the nozzle portion 61. In addition, FIG.
The cross section of the right half in (a) is displayed in a state rotated by 45 degrees in the circumferential direction with respect to the cross section of the left half.

According to the fourth embodiment, the pressing rib 53
Is disposed on the inner ceiling surface 52 so that when the cap 51 is attached to the neck portion 14 of the container body 11, the outer edge portion is positioned so as to overlap with the portion directly above the annular upper end of the neck portion 14. Further, the pressing rib 53 has a protruding length such that a gap corresponding to the thickness of the packing 57, or a gap slightly smaller than this, is held between the upper end of the neck portion 14 and the lower ends of these pressing ribs 53. It projects downward. As a result, in the packing 57, in the annular portion along the upper end of the neck portion 14, the free portion 55 where only the upper end of the neck portion 14 abuts from the lower surface side of the packing 57 and the upper end of the neck portion 14 contacts from the lower surface side of the packing 57. The lower end of the pressing rib 53 that is in contact with the fixing portion 56 is in contact with the packing 57 from the upper surface side.

Also, according to the container 50 with a cap of the fourth embodiment, when the internal pressure of the container body 11 is not so high, the packing 57 is brought into close contact with the upper end of the neck portion 14 over the entire circumference. At the same time, when the internal pressure of the container body 11 becomes high, the packing 57 is bent so as to warp upward in the free portion 55, and the same operational effect as that of the capped container 10 of the first embodiment can be obtained. Become.

11 (a) to 11 (d) illustrate another shape of the pressing rib projecting from the inner ceiling surface of the cap in the present invention. That is, according to the present invention, in addition to the pressing ribs according to the above-described embodiments, pressing ribs 70 are provided at three locations (see (a)) and arc-shaped ribs 71 (see (b)). Various shapes such as a disk-shaped rib 72 (see (c)) with a part cut away, a cylindrical rod-shaped rib 73 (see (d)), and the like can be appropriately adopted.

As shown in FIGS. 12 (a) and 12 (b), the inner ceiling surface 75 of the cap 74 is provided with a plurality of recessed portions 76 which are recessed upwards in the circumferential direction. The packing 78 is sandwiched between the upper end of the neck 77 and the upper end of the neck 77 by using 75 itself as a pressing rib, and at the recess 76,
It is also possible to form a free portion 79 in which only the upper end of the neck portion 77 comes into contact with the packing 78 from the lower surface side of the packing 78.

13 (a) and 13 (b) show the fifth embodiment of the present invention.
Container 80 with cap and cap 81 according to the embodiment
Is shown. According to the fifth embodiment, the cap 81 has the band-shaped recesses 83 extending in an arc shape along the outer peripheral portion of the inner ceiling surface 82 at three positions at equal angular intervals. Container body 1 itself as a pressing rib
A packing 85 is sandwiched between the upper end of the neck portion 14 and the upper end of the neck portion 14. In addition, for the convenience of manufacturing a die for molding the cap 81, the strip-shaped recess portion 83 has a bottom surface of the recess,
13B, the depth is increased from the rear end portion in the clockwise direction X toward the front in the clockwise direction, and the taper surface is formed along the inclination of the internal thread 22 of the internal thread. In the above, only the upper end of the neck portion 14 of the container body 11 forms a free portion 87 that comes into contact with the packing 85 from the lower surface side of the packing 85.

Further, according to the fifth embodiment of the present invention, a peripheral edge supporting rib 88 protruding inward is continuously formed along the outer peripheral edge of each band-shaped recess 83 at the upper end of the inner peripheral surface of the cap 81. The peripheral support ribs 88 are provided on the outer periphery of the upper end of the neck portion 14 of the container main body 11 from the upper surface side of the packing 85 so that the peripheral edge portion of the packing 85, which is located in the free portion 87 by the band-shaped recess 83, is located outside. Lock. The peripheral edge supporting rib 88 does not necessarily have to be continuously provided over the entire area of the free portion 87, and the free portion 87 of the packing 85 is not necessarily provided.
It suffices if it is provided at a position where at least a part of the portion located at is locked.

Also according to the fifth embodiment, when the internal pressure of the container body 11 is not so high, the packing 8
5 in close contact with the upper end of the neck 14 over the entire circumference, and when the internal pressure of the container body 11 becomes high,
Bend the packing 85 upward in the free section 87,
The same effects as those of the container 10 with a cap of the first embodiment described above can be obtained. Further, according to the fifth embodiment, since the peripheral edge supporting rib 88 that locks the peripheral edge portion of the portion of the packing 85 located in the free portion 87 from the upper surface side is provided, in the free portion 87, the packing 85 of the packing 85 is provided. The peripheral portion will be supported from above not as a cantilever but as a cantilever. Therefore, when the internal pressure of the container body 11 is not so high, the packing 85 can be brought into close contact with the upper end of the neck portion 14 in a stable state to reliably prevent the hair dye encapsulated in the container body 11 from flowing out, and It is possible to allow the packing 85 to be restored more smoothly after the gas generated by the increase is removed.

The present invention is not limited to the above-mentioned embodiments, and various modifications can be made. For example, the container body to which the cap is attached does not necessarily have to be a laminated peeling container having a double structure, and the cap and the container body do not necessarily have to be made of plastic. Also, the contents contained in the container do not necessarily have to be a hair dye,
It is also possible to accommodate other cosmetics, various contents that generate gas, such as chemicals, paints, and foods. Further, the peripheral edge supporting ribs for locking the peripheral edge portion of the portion located in the free portion of the packing from the upper surface side of the packing are, for example, the above-mentioned first to fourth parts.
It can also be used by being provided on the cap in the embodiment.

[0035]

EFFECTS OF THE INVENTION According to the cap-equipped container and cap of the present invention, liquid does not leak during normal storage or distribution, and when the internal pressure exceeds a certain level, the generated gas or the generated gas and the contents are removed. Function can be easily obtained without providing a special structure to the packing, and it prevents the container from bursting even if the foamable contents are contained and the internal pressure rises excessively. It is possible to effectively avoid splashing around.

[Brief description of drawings]

FIG. 1 is a sectional view showing a main part of a container with a cap according to a first embodiment of the present invention.

2A is a cross-sectional view of the cap, and FIG. 2B is a bottom view of FIG. 2A viewed from below.

3 is a top view of the packing taken along the line AA of FIG.

FIG. 4 is a cross-sectional view of a state in which gas is discharged, showing a main part of the capped container according to the first embodiment of the present invention in a state where FIG. 1 is rotated 45 degrees in the circumferential direction.

5A is a cross-sectional view showing a main part of a container with a cap according to a second embodiment of the present invention, and FIG. 5B is a bottom view of the cap as viewed from below.

FIG. 6 is a top view of the packing taken along the line BB of FIG.

7A is a cross-sectional view showing a main part of a container with a cap according to a third embodiment of the present invention, and FIG. 7B is a bottom view of the cap as viewed from below.

8 is a top view of the packing taken along the line CC of FIG. 7 (a).

9A is a cross-sectional view showing a main part of a container with a cap according to a fourth embodiment of the present invention in a state where the right half is rotated 45 degrees with respect to the left half, and FIG. 9B is the cap. It is the bottom view which looked at from below.

FIG. 10 is a top view of the packing taken along the line DD of FIG. 9 (a).

FIG. 11A is a bottom view of the cap illustrating another form of the pressing rib protruding from the inner ceiling surface. (B)
[Fig. 4] is a bottom view of the cap as viewed from below.

12A and 12B are a bottom view and a cross-sectional view of a cap illustrating still another form of the pressing rib protruding from the inner ceiling surface.

13A is a cross-sectional view showing a main part of a container with a cap according to a fifth embodiment of the present invention, and FIG. 13B is a bottom view of the cap as viewed from below.

[Explanation of symbols]

10, 30, 40, 50, 80 Capped containers 11 container body 12 Outer container 13 inner bag 14 neck 16,31,41,51,81 Cap 17,57,85 packing 18, 32, 42, 52, 82 Inner ceiling surface 19,53 Pressing rib 20,35,45,55,87 Free part 21, 36, 56 Fixed part 22 Thread for Female Thread 23 Thread for Male Thread 24 Locking rib 33 Outer pressing rib 34 Center pressing rib 37 Notch groove 43 drum-shaped pressing rib 83 Band-shaped depression 88 Peripheral support rib

Claims (6)

[Claims] 1. A container with a cap, in which a cap is screwed on a neck portion of a container body with a packing interposed, wherein a pressing rib protruding downward is provided on an inner ceiling surface of the cap, At the time of mounting the cap, the packing is sandwiched between the lower end of the pressing rib and the upper end of the neck, and the free end where the packing contacts only the upper end of the neck from the lower surface side of the packing is at the upper end of the neck. A container with a cap, wherein the pressing rib is arranged on the inner ceiling surface so as to be provided on at least a part of the container. 2. The pressing rib, wherein the packing has a free portion in which only the upper end of the neck portion abuts from the lower surface side of the packing, and the upper end of the neck portion from the lower surface side of the packing,
A lower end of the pressing rib has a fixing portion that abuts from the upper surface side of the packing along the upper end of the neck portion,
The container with a cap according to claim 1, which is arranged on the inner ceiling surface. 3. A cutout groove is formed in a lower portion of the free portion when the cap is attached by vertically traversing at least one of a screw thread on an inner peripheral surface of the cap and a screw thread on an outer peripheral surface of the neck portion. The container with a cap according to claim 1 or 2, wherein the container is formed. 4. A peripheral edge supporting rib that locks a peripheral edge portion of a portion of the packing located in the free portion from the upper surface side of the packing outside the upper end of the neck portion is provided at an upper end portion of an inner peripheral surface of the cap. The container with a cap according to any one of claims 1 to 3. 5. A cap to be screwed and attached to a neck portion of a container body of a container with a cap according to claim 1, wherein a pressing rib protruding downward from an inner ceiling surface is provided. At the time of mounting on the neck portion, the packing is sandwiched between the lower end of the pressing rib and the upper end of the neck portion, and the packing has a free portion where only the upper end of the neck portion abuts from the lower surface side of the packing. A cap formed by arranging the pressing rib on the inner ceiling surface so as to have at least a part along the upper end. 6. A peripheral supporting rib protruding inward is provided at an upper end portion of the inner peripheral surface, and the peripheral supporting rib has a peripheral portion of a portion of the packing located at the free portion outside the upper end of the neck portion. The container with a cap according to claim 5, wherein the packing is locked from the upper surface side of the packing.