JPH066061Y2 - Sealed container - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a structure of a container that can maintain a sealed state even if it is opened and closed many times, and has a high hermeticity when closed, The present invention relates to a container structure effective for storing contents such as pharmaceuticals that are extremely disliked by the ingress of outside air.

[Conventional technology]

The sealability of the container largely depends on the fit between the container body (hereinafter referred to as a bottle) and the cap, and the packing method shown in FIG. 3 and the inner stopper method shown in FIG. Has been adopted.

[Problems to be solved by the device]

The conventional packing method shown in FIG. 3 is a packing (12).
Absorbs the unevenness between the tip surface (14) of the opening (13) of the bottle and the upper surface (15) of the cap (a), and is crushed, so that the packing (12) itself has an elastic force. The sealing property can be obtained. In this case, softness that is crushed by the tightening force between the bottle (b) and the cap (a) is required. For this reason, foamed polyethylene sheet or rubber is generally used as the material.

Further, in the inner stopper system shown in FIG. 4, the inner wall (17) of the inner stopper (16) is pressure-bonded to the inside of the opening (13) of the bottle (b), so that the shape of the inner wall (17) is deformed. The elastic force is used to enhance the sealing property, and a material harder than the packing method described above, such as low density polyethylene, is used.

However, in the case of the packing method described above, the thickness is 2-3 mm.
When the foamed polyethylene is used, the area to be crimped is only the end face of the tip of the opening (13) of the bottle (b), and it is strongly tightened with a small area, so the crushed part tends to return to its original shape. The force is very small, and that portion undergoes plastic deformation, and the sealing performance deteriorates over time. Further, even if rubber is used, there is a drawback that the elastic force at a low temperature is extremely poor and the sealing property cannot be obtained.

In the case of the above-mentioned inner stopper system, the inner stopper (16) is pushed into the inner surface of the opening (13) of the bottle and deformed by being deformed so that the inner stopper has a sealing property. The applied elastic force is much smaller than the tightening force due to the screw thread between the bottle and the cap in the packing method described above. On the other hand, if the large inner plug (16) is forced to be pushed in order to increase the amount of deformation, there is a drawback that the inner plug "cannot be pulled out" during use. Furthermore, glass bottles and plastic bottles have large variations in the inner diameter of the opening (13) of the bottle, making it difficult to always obtain a uniform elastic force.
It is the current situation that plastic bottles can cope with variations by reamer finishing after molding, and glass bottles cannot handle it.

[Means for Solving the Problems]

In order to solve the above-mentioned problems, the present invention utilizes the advantages of the packing method and the inner plug method, and does not use foamed polyethylene with weak elasticity or rubber that is weak at low temperature, and uses a hard material such as low density polyethylene. Use the packing type bottle opening (13) and the cap screw thread to obtain a large tightening force, and use the elastic force obtained from the shape change of the inner stopper method instead of relying on the deformation of the circumferential wall of the inner stopper. In order to generate by the tightening force of the screw, it was possible to obtain the part of the packing that is in contact with the opening end face of the bottle by using a packing that makes the bottle side flat and the cap side curved.

[Action]

When the cap and bottle configured as described above are strongly tightened, the end face of the bottle opening is strongly pressed against the flat surface of the packing, and the packing has a curved cap surface, so the outer peripheral side sinks in the cap direction and the inner peripheral side A strong elastic force is obtained due to the deformation that rises toward the bottle.
Moreover, by making the flat part of the packing wider than the bottle opening, the effect can be obtained without changing the product, and it says that the inner plug cannot be removed when the cap is opened like the inner plug method. Disappears.

〔Example〕

An embodiment will be described with reference to the drawings. The present invention comprises a cap portion (a) and a bottle (b) as shown in FIG.

The cap portion (a) includes a cap body (1) and a packing (2). The cap body (1) is provided with a spherical groove (4) having an arc-shaped cross section inside the upper wall portion (3), and a circumferential wall (5) is provided at the center.

The packing (2) has an outer peripheral wall (7) standing in the direction of the upper wall (3) connected to the outer periphery of a disk-shaped disc portion (6), and has a semicircular cross section at its tip. The pressure receiving part (8) is connected. The shape of the pressure receiving portion (8) on the upper wall portion (3) side of the cap portion (a) is the same as the shape of the spherical groove (4) of the upper wall portion (3), and the bottle side is a flat surface. The positions of (4) and the pressure receiving portion (8) also coincide with each other on a concentric circle.
Further, a circumferential rib (9) is continuously provided in the center of the disc portion (6) in the direction of the upper wall portion (3), and is fitted inside the circular wall (5) of the upper wall portion (3). , Make sure that the packing (2) does not come off from the cap portion (a).

The bottle (b) has an end face (11) having a semicircular cross section at the tip of the opening (10), and the center of the end face (11) is closer to the center of the pressure receiving part (8) of the packing (2). Is also designed to be large.

FIG. 2 shows a state in which the cap portion (a) on which the packing (2) is set is attached to the bottle (b). The end surface (11) of the opening (10) of the bottle (b) strongly pushes the flat surface side of the packing (2), but the diameter of the tip of the end surface (11) of the opening (10) is the pressure receiving surface of the packing (2). The pressure receiving portion (8) is subjected to a force greater than the crushing caused by the material of the packing (2) by making it slightly larger than the center of the semicircular shape of the portion (8), and the pressure receiving portion (8) has a semicircular spherical groove (4). Displacement occurs in the inside of the pressure receiving part (8), and the outside of the pressure receiving part (8) is deformed toward the upper wall part (3), and the inside is deformed toward the bottle (b) direction. The elastic force to return the deformation is much stronger than the elastic force of the above-mentioned inner plug system, and the sealing performance can be improved. Therefore, the packing (2) is preferably made of a material such as low density polyethylene, which is harder than foamed polyethylene or rubber.

This is also because the packing (2) can be coped with by tilting the end surface (11) of the bottle (b), and the line contact makes it possible to cover the variation in the size of the opening (10) of the bottle (b). it can.

Furthermore, if the semicircle of the cross section of the pressure receiving part (8) is enlarged, not only the variation of the opening (10) but also the same cap part (a) can be used for the opening (10) whose dimensions are intentionally changed. Becomes

[Effect of device]

Since the present invention is configured as described above, it has the following effects.

The contact between the packing and the opening of the bottle is achieved by utilizing the tightening force of the screw, and the elastic force is obtained not by the elastic force of the material itself but by the deformation of the shape of the special packing that can be made thicker, so that the strong sealing performance can be maintained. In addition, it can be opened and closed easily by simply pushing the bottle opening from the end. Further, the fitting of the cap and the opening of the bottle is not required to be adjusted, and the manufacturing is simple.

[Brief description of drawings]

FIG. 1 is a sectional view of the structure of the highly sealed container of the present invention, FIG. 2 is a sectional view of the state of being set, FIG. 3 is a sectional view of a packing method of the prior art, and FIG. 4 is an inside plug of the prior art. It is sectional drawing of a system. a ... cap part, b ... bottle 1 ... cap body, 2 ... packing 3 ... upper wall part, 4 ... spherical groove 5 ... circumferential wall, 6 ... disk part 7 ... outer peripheral wall, 8 ... pressure receiving part 9 ... circumferential rib 10 ... Opening 11 ... End face 12 ... Packing 16 ... Inner plug

Claims (3)

[Scope of utility model registration request] 1. A disc-shaped disc portion having a circular rib in the center of a cap body provided with a spherical groove having an arc-shaped cross section inside the upper wall portion in the opening of the container body and a circumferential wall in the center. A sealed container having an outer peripheral wall standing upright on the outer periphery and a cap loaded with a packing in which a pressure receiving portion having a semicircular cross section is connected to the tip of the outer peripheral wall. 2. The hermetically sealed container according to claim 1, wherein the tip of the opening of the container body is a curved surface. 3. The sealed container according to claim 1, wherein the radius of the opening of the container body is larger than the distance from the center of the packing to the center of the pressure receiving portion and smaller than the distance to the outer edge of the pressure receiving portion.