JP6217126B2 - Container with cap - Google Patents

Description

  The present invention relates to a container with a cap that includes a container body and a cap. The cap includes a cap peripheral wall that hangs down from the outer periphery of the cap top plate, and an inner ring that hangs down from the outer periphery of the cap top plate at a position inside the cap peripheral wall, and a container between the cap peripheral wall and the inner ring. By sandwiching the peripheral wall of the opening of the main body, the opening of the container main body is closed and sealed.

Such a container with a cap is well known as described in Patent Document 1, for example.
The container with a cap described in Patent Document 1 has a plastic bottle as a container body, and a threaded portion is provided on the outer periphery of the opening thereof, while a threaded portion is also provided on the inner surface of the peripheral wall of the cap. Then, by screwing the cap, the peripheral wall of the opening of the container body enters between the cap peripheral wall and the inner ring, and the cap peripheral wall and the inner ring press and seal the opening peripheral wall of the plastic bottle.

 However, in such a container with a cap, when the cap is screwed and the opening peripheral wall of the container main body is advanced, the end of the opening peripheral wall of the container main body hits the lower end of the inner ring, May interfere with its entry. On the other hand, if the inner ring is configured to be smaller than the inner diameter of the peripheral wall of the opening of the container body, the peripheral wall of the opening can be prevented from hitting the lower end of the inner ring, and the cap can be smoothly attached. Adhesiveness between the inner ring of the attached cap and the peripheral wall of the opening is weakened, so that the sealing performance of the container is hindered.

JP 2001-233362 A

  The present invention has been made based on such circumstances, and it is intended to provide a cap-equipped container in which the adhesion between the inner ring and the opening peripheral wall of the container body is strengthened and the cap can be easily attached. It is the purpose.

Specifically, the invention according to claim 1 is a container with a cap configured to include a container main body and a cap, and the cap includes a cap top plate that closes an opening of the container main body, and the cap top plate. A cap peripheral wall depending from the outer periphery of the cap, and an inner ring depending from the outer periphery of the cap top plate at a position inside the cap peripheral wall, and the peripheral wall of the opening of the container body between the cap peripheral wall and the inner ring In a container that closes the opening of the container body by sandwiching
The inner ring has a bent portion, and the outer diameter of the bent portion is configured to be larger than the inner diameter of the peripheral wall of the opening of the container body, and the inner ring is above the cap top plate above the bent portion. The inner ring has a shape that expands toward the bent portion, and the inner ring is reduced in diameter from the bent portion toward the lower end below the bent portion, and the lower end portion is configured to be smaller than the inner diameter of the peripheral wall of the opening of the container body. Has been
The cap peripheral wall is provided with a plurality of protrusions directed inward in the circumferential direction of the container body, and the protrusion peripheral part is positioned above the bent part of the inner ring, whereby the opening peripheral wall is twisted. It is a container with a cap characterized by a force acting in the direction .

In this invention, since the outer diameter of the bent portion of the inner ring is larger than the inner diameter of the opening peripheral wall of the container body, when the cap is attached to the container main body, the bent portion presses the opening peripheral wall from the inside. To do. As described above, in a state where the cap is mounted, since the outward bending stress is applied to the bent portion of the inner ring, the two come into close contact with each other with a strong force. In addition, since the inner ring and the peripheral wall of the opening of the container body are in line contact with each other at the bent portion, they are in close contact with each other with a uniform force over the entire circumference. The container is sealed at the linear contact portion.

  Next, since the lower end portion of the inner ring is configured to be smaller than the inner diameter of the opening peripheral wall of the container body, when the cap is attached to the container body, the opening peripheral wall of the container body may abut against the lower end portion of the inner ring. Absent. In addition, the inner ring is bent at the contact portion, that is, both the outer surface and the inner surface of the inner ring have a shape that expands from the cap top plate toward the bent portion, and the lower end from the bent portion. Therefore, the inner ring bends inward at the bent part and the upper part as the peripheral wall of the opening enters. For this reason, even after the opening peripheral wall is sandwiched between the lower end portion of the inner ring and the cap peripheral wall, it can enter smoothly without receiving strong resistance.

  Thus, according to the present invention, since the bent portion of the inner ring is configured to be larger than the inner diameter of the opening peripheral wall of the container body, the container body can be sufficiently sealed even though the bent portion can be sufficiently sealed. The peripheral wall of the opening does not abut against the lower end of the inner ring, and the entry becomes easy.

  According to the present invention, the bent portion of the inner ring presses the opening peripheral wall of the container body toward the outside, while the protruding portion of the cap peripheral wall presses inward at the upper position thereof. Adhesion is enhanced and it becomes possible to seal more reliably.

  According to the present invention, since a plurality of the projecting portions are provided in the circumferential direction, the periphery can be sealed with a uniform force. In addition, it is desirable that the plurality of protrusions be provided uniformly in the circumferential direction of the peripheral wall of the opening of the container body. For example, when the opening peripheral wall is cut in the horizontal direction, the central angle of the cross section is divided equally.

The invention described in Claim 2 is a capped container according to claim 1, characterized in that either one of the container body and the cap is made of a flexible material than the other. In the case where the cap is made of a flexible material, the inner ring is more flexibly inwardly bent at the bent portion or the upper portion, so that it is easier to enter the peripheral wall of the opening. In addition, in the case where the container body is made of a flexible material, the inner ring bends inward at the bent portion or the upper portion, and the peripheral wall of the opening bends outward in this case. In addition, it becomes easier to enter the peripheral wall of the opening. That is, in any case, it is easier to enter the peripheral wall of the opening.

The invention according to claim 3 is the container with a cap according to claim 1 or 2 , wherein both the container body and the cap have ultraviolet blocking properties. This container with a cap is suitable as a container for storing contents that are easily deteriorated by ultraviolet rays. For example, an ultraviolet curable ink container.

  According to the present invention, the inner ring can be sufficiently sealed, and the peripheral wall of the opening of the container body does not abut against the lower end of the inner ring when the cap is attached, and the entry is facilitated.

Sectional drawing of the principal part of the container with a cap which concerns on this invention.

  The container of the present invention has a container body and a cap as essential components. FIG. 1 is a cross-sectional view of the main part showing the periphery of the opening of the container body.

  As can be seen from FIG. 1, the cap 1 according to the present invention has a cap top plate 11 that closes the opening of the container body 2, and the cap peripheral wall 12 hangs from the outer periphery of the cap top plate 1. . An inner ring 13 hangs from the outer periphery of the cap top plate 11 at a position inside the cap peripheral wall 12.

  The opening of the container body 2 is surrounded by a cylindrical peripheral wall 22. A screw portion 22 a is provided on the outer periphery of the opening peripheral wall 22, and a screw portion 12 a is also provided on the inner surface of the cap peripheral wall 12. The cap 1 is attached to the container body 2 by screwing the threaded portion 22a of the container body 2 and the threaded portion 12a of the cap peripheral wall 12 together. Of course, the cap 1 and the container main body 2 can be repeatedly opened and attached (that is, removed). In the state where the cap 1 is mounted on the container main body 2, the cap top plate 11 closes the opening of the container main body 2.

  The inner ring 13 has a bent portion 13b located in the center from the cap top plate 11 toward the lower end portion 13d, an upper portion 13a closer to the cap top plate 11 than the bent portion 13b, and a lower end portion from the bent portion 13b. It can be divided into a lower part 13c close to 13d. The outer diameter of the bent portion 13b is configured to be larger than the outer diameter of the upper portion 13a and the outer diameter of the lower portion 13c. That is, it is a part with the largest outer diameter among each part of the inner ring 13. And the outer diameter of this bending part 13b is comprised larger than the internal diameter of the opening part surrounding wall 22 of the container main body 2. FIG. For this reason, in a state where the cap 1 is mounted on the container main body 2, the cap 1 and the container main body 2 are in line contact with the bent portion 13b, and the bent portion 13b presses and seals the opening peripheral wall 22 from the inside. ing.

  The bent portion 13b has an inner diameter larger than the inner diameter of the upper portion 13a and the inner diameter of the lower portion 13c. For this reason, the thickness of the bending part 13b is comprised by the same thickness as the thickness of the upper part 13a. Thus, in order to make the thickness of the bent portion 13b the same as the thickness of the upper portion 13a and to maximize the outer diameter of the bent portion 13b, the upper portion 13a above the bent portion 13b Both the outer diameter and inner diameter of the inner ring 13 are configured to expand from the cap top plate 11 toward the bent portion 13b.

Further, the lower end 13 d of the inner ring 13 is configured to be smaller than the inner diameter of the opening peripheral wall 22 of the container body 2. For this reason, when the cap is attached to the container body, the opening peripheral wall 22 of the container body 2 does not hit the lower end portion 13 d of the inner ring 13. As described above, the outer diameter of the lower portion 13c from the bent portion 13b to the lower end portion 13d is configured to be smaller than the outer diameter of the bent portion 13b, and the inner diameter of the lower portion 13c is also smaller than the inner diameter of the bent portion 13b. It is configured. For this reason, in the lower part 13c, the outer diameter and inner diameter of the inner ring 13 are both reduced in diameter from the bent part 13b toward the lower end part 13d.

  It is desirable that the thickness of the lower end portion 13d be thinner than the thickness of the upper portion 13a and the bent portion 13b. For this reason, in the lower part 13c, it is desirable to be comprised so that the thickness may reduce gradually toward the lower end part 13d from the bending part 13b.

  Since the inner ring 13 is bent at the middle bent portion 13b as described above, that is, the outer diameter and inner diameter of the inner ring 13 are both maximized at the bent portion 13b. Therefore, although the bent portion 13b presses and seals the opening peripheral wall 22 from the inside, when the cap 2 is mounted, the inner ring 13 bends as the opening peripheral wall 22 enters and strong resistance is generated. It becomes possible to install smoothly without receiving.

  Next, the inner surface of the cap peripheral wall 12 is provided with a projecting portion 12b directed inward. The projecting portion 12b is disposed at a position above the screw portion 12a, and is disposed at a position above the bent portion 13b. And this protrusion part 12b presses the opening part surrounding wall 22 toward inner side, presses the opening part surrounding wall 22 against the said bending part 13b, and improves both adhesiveness. That is, when the opening peripheral wall 22 is pressed inward by the plurality of protrusions 12b and pressed outward by the bent portion 13b, a force is applied to the opening peripheral wall 22 in the twisting direction. Therefore, the opening peripheral wall 22 of the container main body 2 is brought into close contact with the bent portion 13b with a strong force to improve the sealing performance, and the cap 1 is firmly fixed to the container main body 2.

  And since the opening part surrounding wall 22 of the container main body 2 is forcedly pressed to the bending part 13b in this way, even if the opening part surrounding wall 22 has a softness | flexibility, the opening part surrounding wall 22 is made into the said bending part 13b. It is possible to improve the sealing performance by sufficiently adhering. For example, this is the case of the container body 2 having a cylindrical shape with a wall thickness of the opening peripheral wall 22 of 1 mm or less and a diameter of the opening of 100 mm or more. In the case of the container body 2 having the cylindrical opening peripheral wall 22 having such a thin large diameter, the opening peripheral wall 22 is generally easily crushed by a lateral force and deformed into an elliptical shape. Easy to open. However, even in the case of having such a thin-walled cylindrical opening peripheral wall 22, the direction in which the opening peripheral wall 22 is sandwiched from inside and outside by the bent portion 13b and the plurality of protrusions 12b and twisted. It is possible to prevent the opening peripheral wall 22 from being deformed by pressing it against the opening.

  Even when the protruding portion 12b forcibly presses the opening peripheral wall 22 of the container body 2 against the bent portion 13b as described above, the cap 1 is attached with the inner portion of the opening peripheral wall 22 when the cap 1 is attached. Since the ring 13 bends, it can be mounted smoothly without receiving strong resistance.

  In addition, when the protrusion part 12b exists in the position lower than the said bending part 13b, when the cap 1 is fixed to a container main body, the force of the direction twisted with respect to the opening part surrounding wall 22 will not act, It becomes difficult to improve the sealing performance.

  Further, when the protruding portion 12b is at the same height as the bent portion 13b, the cap 1 and the container body are fixed with a stronger force, but when the cap 1 is attached to the container body 2, When the tip of the opening peripheral wall 22 reaches this position, the torque increases rapidly, making it difficult to smoothly attach the peripheral wall 22 to the opening.

  Sixteen protrusions 12 b are provided in the circumferential direction of the container body 2. The position is a position that divides the central angle of the transverse section into 16 equal parts when the opening peripheral wall 22 is cut in the lateral direction. For this reason, these 16 protrusion parts 12b press the opening part surrounding wall 22 with the uniform force over the circumference | surroundings. The number of protrusions 12b is not limited to 16, but a plurality of protrusions 12b are desirable. The number is preferably 4 or more, for example, 6 or 8. In addition, although this protrusion part 12b can also be provided over the perimeter of the opening part surrounding wall 22, when attaching the cap 1 to the container main body 2, the front-end | tip of the opening part surrounding wall 22 will be in this position. When it reaches, the torque increases rapidly, making it difficult to install smoothly.

  Such a cap 1 and the container main body 2 can be molded from an arbitrary thermoplastic resin. For example, low density polyethylene, high density polyethylene, polypropylene, polyvinyl chloride, polyvinylidene chloride, polyester, polyamide, polystyrene and the like. Moreover, it is also possible to mix and mold these resins with appropriate additives. For example, a colorant or an ultraviolet absorber. If both the cap 1 and the container main body 2 are molded with a resin to which an ultraviolet absorber is added, both the cap 1 and the container main body 2 have the result of having an ultraviolet blocking property. Suitable as a container to do. Moreover, the cap 1 and the container main body 2 which have ultraviolet-blocking property can also be manufactured by shape | molding with the black resin which added carbon black. This container is also suitable as a container for storing contents that are easily deteriorated by ultraviolet rays. Examples of the contents that are easily deteriorated by ultraviolet rays include, in addition to various foods, photosensitive films, ultraviolet curable inks, and ultraviolet curable paints.

  In addition, it is desirable that either one of the cap 1 and the container body 2 is made of a material that is more flexible than the other. For example, one is made of polypropylene and the other is made of high-density polyethylene that is more flexible than polypropylene. In the case where the cap 1 is made of a flexible material, the inner ring 13 bends more flexibly toward the inside, so that the opening of the opening peripheral wall 22 is further facilitated. Further, when the container body 2 is made of a flexible material, the inner ring bends inward and the opening peripheral wall 22 bends outward. The approach of the peripheral wall 22 becomes easier. That is, in any case, the entrance of the opening peripheral wall 22 becomes easier.

  In addition, when either one of the cap 1 and the container body 2 is made of a material that is more flexible than the other, it is possible to prevent occurrence of shavings due to repeated screwing even if the cap 1 is repeatedly attached and detached. Have both.

  The cap 1 according to the present invention can be molded by an injection molding method. After the injection molding, when taking out from the mold, the die can be punched by so-called forcible punching. That is, when the inner ring 13 is pulled out from the mold with a strong force, the inner ring 13 can be easily pulled out without being damaged by being bent at the bent portion 13b, the upper portion 13a, or the lower portion 13c.

  Moreover, the container main body 2 can be shape | molded by arbitrary shaping | molding methods. For example, there are an extrusion blow molding method and an injection blow molding method. When blowing by these extrusion blow molding methods or injection blow molding methods, it is also possible to stretch. It is also possible to form the container body 2 by an injection molding method.

In addition, although this invention was demonstrated taking the case of what screw-fits to the container main body 2 as the cap 1, it is also possible to use the cap with which it installs not only in this but a stoppering system. It is also possible to use a cap having a contact ring on the lower surface of the cap top plate 11. The contact ring is provided to hang from the top plate 11 at a position between the cap peripheral wall 12 and the inner ring 13, and when the cap 1 is fixed to the container main body 2, the opening peripheral wall 22 of the container main body 2. It abuts on the tip of the tube and seals at this position. In this case, since sealing is performed by both the bent portion 13b of the inner ring 13 and the contact ring, the sealing performance is further improved.

DESCRIPTION OF SYMBOLS 1 Cap 11 Cap top plate 12 Cap peripheral wall 12a Screw part 12b Protrusion part 13 Inner ring 13a Upper part of inner ring 13b Bending part of inner ring 13c Lower part of inner ring 13d Lower end part of inner ring 2 Container body 22 Opening part peripheral wall 22a Threaded part

Claims (3)

A container with a cap configured to include a container main body and a cap, wherein the cap closes an opening of the container main body, a cap peripheral wall depending from the outer periphery of the cap top plate, and the cap An inner ring that hangs down from the outer periphery of the cap top plate at a position inside the peripheral wall, and the opening of the container main body is closed by sandwiching the peripheral wall of the opening of the container main body between the cap peripheral wall and the inner ring. In the container
The inner ring has a bent portion, and the outer diameter of the bent portion is configured to be larger than the inner diameter of the peripheral wall of the opening of the container body, and the inner ring is above the cap top plate above the bent portion. The inner ring has a shape that expands toward the bent portion, and the inner ring is reduced in diameter from the bent portion toward the lower end below the bent portion, and the lower end portion is configured to be smaller than the inner diameter of the peripheral wall of the opening of the container body. Has been
The cap peripheral wall is provided with a plurality of protrusions directed inward in the circumferential direction of the container body, and the protrusion peripheral part is positioned above the bent part of the inner ring, whereby the opening peripheral wall is twisted. A container with a cap that is characterized by a force acting in the direction . The container with a cap according to claim 1 , wherein one of the container body and the cap is made of a material that is more flexible than the other. The container with a cap according to claim 1 or 2 , wherein both the container body and the cap have ultraviolet blocking properties.

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