JP3283107B2 - Container with inner lid and elastic packing for holding the inner lid - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a container having an inner lid and an elastic packing for holding the inner lid suitable for use therein.
In particular, the present invention relates to a container having an inner lid suitable for containing a liquid or low-viscosity object as a content in a sealed manner, and an inner packing presser elastic packing suitable for use therein.

[0002]

2. Description of the Related Art Conventionally, an inner lid made of a resin material is press-fitted into an opening portion of a bottomed container body, and a main cover is further pressed from above to hold the inner lid between the container body and the main cover. By doing
2. Description of the Related Art Containers having an inner lid for accommodating the contents in a sealed state are known. This type of container is easy to open and close because the inner lid is made of resin and plastic, and can be repeatedly formed in a sealed state and an opened state, so that a larger opening can be easily formed. Can do
It is an effective container as a sealed container. Usually, containers of this kind with a middle lid have a certain degree of fluidity, such as powdered pharmaceuticals, cosmetics with relatively high viscosity such as hand cream, or jelly-like foods, but vaporize the components. It is used to hermetically store materials with low or no evaporation.

[0003]

As described above, a container in which an inner lid made of a resin material is pressed into an opening of a container body is an effective container as a sealed container, but its use is limited. It is not used as a sealed container for products such as aqueous liquids and low-viscosity liquids in which some of the components may evaporate or evaporate due to changes in the storage environment. It may, in some situations, be water-based,
This is because the contents may leak out of the container.

The reason will be described with reference to FIG.
In the figure, reference numeral 1 denotes a bottomed container main body, and a screw thread 3 as a locking portion is formed in an upper opening. After accommodating the required contents A in the container main body 1, an inner lid 10 formed of a resin material such as polypropylene having the same outer diameter as the inner diameter of the opening is press-fitted into the opening, and its flange 11 is It is in a state of being locked to the upper end of the container body. Next, the main cover 2 having a screw thread 4 as a locking portion on the inner periphery is screwed from above and tightened, and an inner cover is provided between a part of the back surface of the main cover 2 and the opening end of the container body 1. The fastening is completed by fastening the flange 11 of 10 in a crimped state, and the contents are hermetically sealed in the container.

In such a sealing means, the container body 1
Surface of the container body 1, that is, the contact surface between the inner peripheral surface of the opening of the container body 1 and the outer peripheral surface of the inner lid 10 and the container body 1
It is necessary that the contact surface between the front end of the opening and the flange 11 of the inner lid 10 has a certain sealing function, but it is also necessary that the container body 1 and the inner lid 10 can be easily detached. Therefore, the contact surface between the container body 1 and the inner lid 10 is not formed into a perfect mirror surface, and there are countless microscopic unevenness microscopically. The contact surface between the front end portion of the opening of the container body 1 and the flange 11 of the inner lid 10 is made to have a higher airtightness by being tightened by the main lid 2. There is a limit to that extent.

On the other hand, when the inner lid 10 is attached and the main lid 2 is tightened after the contents A are accommodated, the inner lid 10 gradually enters the inside of the container body 1 and the volume of the space B in the container body 1 is increased. Decreases. As a result, the pressure in the space B in the container body 1 increases, and as a result, the sealing operation ends with the inner lid 10 partially deformed by the pressure. Further, when the container A is water-based or has a low viscosity and contains a large amount of evaporating components, a part of the components of the container may evaporate or vaporize depending on the storage state of the container. . Thereby, the internal pressure of the space B is further increased, and the degree of deformation of the inner lid 10 is increased. The state is usually repeated.

As a result, as a result, the contact surface between the container body 1 and the inner lid 10, which is the contact surface between the container body 1 and the inner lid 10, and the outer peripheral surface of the inner lid 10, and the container body 1 At the contact surface between the front end of the opening and the flange 11 of the inner lid 10, a gap having a size larger than the minute unevenness (usually, the passage of liquid is prevented by surface tension) existing there. It is formed. When the content A is a liquid or low-viscosity object, the content moves through the gap when the container is overturned, and the container body 1 and the main cover 2 are moved.
Then, it passes through the gap formed between the screw threads 3 and 4 and finally leaks out of the container.

[0008] For the above reasons, the sealed container in which the flanged inner lid pressed into the opening of the container body is pressed by the main lid has many advantages, but it has the conventional powdery or highly viscous material. And was not used effectively as a sealed container for water-based or low-viscosity objects. The object of the present invention is a highly effective container as a sealed container, a sealed container having a form with a flanged inner lid that is pressed into the opening of the container body, not only for powder or high-viscosity material, An object of the present invention is to make it possible to use it effectively as a sealed container for water-based or low-viscosity objects.

[0009]

In order to solve the above-mentioned problems and to achieve the object, the present inventor has carried out many studies and experiments. First, an experiment was conducted to further tighten the lid 2 for the purpose of enhancing the sealing performance. However, as described above, this was naturally limited due to the problem of mechanical strength, and was insufficient from a practical point of view. No solution was obtained. Next, as another means, an experiment was conducted in which an elastic packing was inserted between the inner lid 10 and the main lid 2 to improve the sealing property between the flange 11 of the inner lid 10 and the main lid 10. In this case, satisfactory results were obtained at the beginning of the experiment, but when the container was rolled after being left in a different environment for a long time, leakage of the contents from between the screw thread portions was observed. . This is because, by the tightening, an independent sealed space is formed between the inner lid and the elastic packing and between the elastic packing and the main lid, and a pressure change occurs in the space B inside the container due to a change in environment, so that the inner lid is closed. When the bottom surface is pushed up, a pressure difference is generated between both spaces, that is, between both surfaces of the elastic packing, and as a result, the inner lid and the elastic packing repeatedly deform as if they are substantially one body, so that the insertion is performed. It is considered that the elastic packing did not perform a special function as the packing.

[0010] The present inventor has further continued experiments and researches. When an elastic packing is inserted between the inner lid and the main lid, the cutout is formed in a part of the elastic packing so that the cutout is formed. I perceived satisfactory results.
That is, the present invention is based on the above-mentioned perception, and as a first invention, a bottomed container main body having a locking portion at a part of an outer peripheral portion, and a flange with a press-fit into an opening of the bottomed container main body. An inner lid, an elastic packing disposed on the inner lid, and an elastic packing for holding the inner lid, the cutout being formed to allow passage of air from one side to the other side in a mounted state, and the bottomed part A main lid having a locking portion for engaging with the locking portion of the container body, wherein the inner lid and the inner lid holding elastic packing are held between the container body by locking and engaging with the bottomed container body. Disclosed is a container having an inner lid, comprising a supporting lid and a possible main lid.

According to a second aspect of the present invention, there is provided an elastic packing for holding a middle lid inserted between a flanged inner lid pressed into a container body and a main lid fixed to the container body,
The packing also has an inner packing for holding the inner lid, wherein a cutout is formed to allow air to pass from one side to the other side when the packing is attached to the container. As the material of the elastic packing, all the materials used for the conventional elastic packing can be used. In addition, the shape, size, and number of cuts are arbitrary and are not limited.

[0012]

According to the container having the inner lid and the elastic packing for holding the inner lid according to the present invention, when a pressure fluctuation occurs in the space inside the sealed container, the fluctuation acts on the inner lid, particularly on the bottom surface thereof. A cut is formed in a part of the elastic packing placed on the inner lid, and from the one side to the other side through the cut in the mounted state, that is, the elastic packing is surrounded by the inner lid and the elastic packing. Since air can pass from the space side to the space surrounded by the elastic packing and the main lid, the pressure on both sides of the elastic packing is always the same even if the bottom surface of the inner lid is displaced. Therefore, the behavior of the inner lid caused by the pressure fluctuation in the space caused by the evaporation of the contents does not directly affect the elastic packing. Therefore, even if the inner lid repeats minute deformation, the elastic packing does not lose its function as a packing,
The state at the time of fastening by the lid can be maintained as it is. Thereby, the sealed state between the opening front end portion of the container body and the flange portion of the inner lid is always kept constant regardless of the minute displacement of the bottom surface portion of the inner lid.

As a result, the sealed state is not destroyed even by a change in environment, and even if the contents are water-based or low-viscosity objects, it is possible to effectively function as a sealed container for a long time. Become.

[0014]

The present invention will be described below in more detail with reference to examples. FIG. 1 is a perspective view for explaining a container having an inner lid and an elastic packing for holding the inner lid according to the present invention;
Except for the inner lid holding elastic packing 20, other configurations are substantially the same as those of the container having the conventional inner lid described with reference to FIG. Therefore, the same members are denoted by the same reference numerals, and detailed description is omitted.

In this embodiment, the inner lid holding elastic packing 20 has an outer diameter substantially the same as the outer diameter of the inner lid 10, and its thickness and material are the same as those used in a conventional sealed container. Same as packing. However, this elastic packing 20 for holding down the inner lid is
A cut 21 (a through-hole in this embodiment) of an appropriate size is formed in a portion inside the portion in contact with the flange 11 of FIG.

The mode of use of the elastic packing 20 for holding the inner lid will be described with reference to FIG. After filling a predetermined amount of the water-based contents (for example, a gem cleaner solution) A, the inner lid 10 is press-fitted in the same manner as in the case of a container having a normal inner lid, and the inner lid holding elastic packing 20 is placed thereon. Deploy. Next, the inner lid 10 is screw-engaged with the container body, so that the inner lid 10 is pressed against the container body 1 and the main lid 2 in a state where the vicinity of the flange portion 11 is pressed through the elastic packing 20.
Is attached, and the contents A are sealed in a state in which the sealed space B is formed inside the container body 1. A space C is also formed between the inner lid 10 and the elastic packing 20, and a space D is formed between the elastic packing 20 and the main lid 2.
The two spaces B and C communicate with each other by a through hole (cut) 21 formed in the elastic packing 20.

Therefore, in the sealed container having the inner lid according to the present invention, the pressure in the space B fluctuates due to evaporation of the contents when the lid 1 is tightened or due to a subsequent environmental change, thereby causing Lid 10 (particularly the bottom part)
Even if is slightly displaced, since the through hole (cut) 21 is formed in the elastic packing 20, the pressure change accompanying the displacement is equally generated in the space C and the space D,
The displacement of the elastic packing 20 is not caused. Thereby,
The sealed state between the opening end of the container body 1 and the flange portion 11 of the inner lid 10 is always kept constant irrespective of the minute displacement of the bottom portion of the inner lid 10. That is, the sealed state of the space B is not destroyed even by a change in the environment, and does not leak out of the container even if the content A is a water-based or low-viscosity object.

In the above-described embodiment, the cutout formed in the inner lid 20 has been described as having a "circular hole" shape, but it is easily understood that this is merely an example of the cutout shape. That is, in order for the present invention to achieve the initial object, the elastic packing disposed on the inner lid is provided with a cut (communication portion) that allows air to pass from one side to the other side in the mounted state. The shape and size of the cut edge are completely arbitrary. FIG. 3 shows another embodiment of the cutout. FIG. 3 (a) shows a square hole, and FIG. 3 (b) shows a cross-shaped slit formed in the center. C) is formed by forming a substantially T-shaped slit in a state in which the open portion communicates with the periphery. Many other shapes are possible. The cut can be formed at the same time as the elastic packing is formed, or can be formed as a separate step.

The use of the container having an inner lid according to the present invention is not particularly limited, and can be used for storing any contents. As described above, the present invention is particularly effective for sealing and storing water-based materials, and is effective, for example, as a container for aqueous jewelry cleaners, accessory cleaners, detergents, cosmetic liquids, spot removers, and the like.

[0020]

By using the container having the inner lid and the elastic packing for holding the inner lid according to the present invention, enclosing the form having the flanged inner lid which is pressed into the opening of the container body which is highly effective as a sealed container. The container can be effectively used not only for powder and high-viscosity materials but also as a sealed container for water-based or low-viscosity objects.

[Brief description of the drawings]

FIG. 1 is a perspective view illustrating a container having an inner lid and an elastic packing for holding the inner lid according to the present invention.

FIG. 2 is a sectional view of a container having an inner lid according to the present invention.

FIG. 3 is a view showing another embodiment of the elastic packing for holding the inner lid according to the present invention.

FIG. 4 is a cross-sectional view of a container having a conventional inner lid.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Bottomed container main body, 2 ... Main lid, 10 ... Center lid, 20 ... Elastic packing for holding down the inner lid, 21 ... Cut

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B65D 53/04 B65D 51/16 B65D 51/18

Claims (2)

(57) [Claims] 1. A bottomed container main body having a locking portion at a part of an outer peripheral portion, a flanged inner lid pressed into an opening of the bottomed container main body, and an elastic packing disposed on the inner lid. An elastic packing for holding down the inner lid, which has a cutout for allowing air to pass from one side to the other side in the mounted state, and a locking portion for engaging with the locking portion of the bottomed container body. A main cover which supports the inner lid and the inner lid holding elastic packing between the main body and the inner lid by being locked and engaged with the bottomed container main body. And container with inner lid. 2. An elastic packing for holding an inner lid, which is inserted between a flanged inner lid pressed into a container main body and a main lid fixed to the container main body, wherein the packing is attached to the container. A packing for holding an inner lid, wherein a cutout is formed to allow air to pass from one side to the other side.