JPH06278759A - Hermetic container of synthetic resin - Google Patents

Abstract

PURPOSE:To provide a hermetic container of synthetic resin which is easy to fill with liquid and whose mouth can be sealed perfectly. CONSTITUTION:At the mouth 2 of a container an inlet part 12 having a larger diameter than the inside diameter of the mouth is formed; an elastic stopping material 6 is inserted in the inlet part and the mouth of the container is closed by this stopping material. On the other hand, for the bottom 3 of the container a hollow bottom wall 13 which caves into the container is formed so as to leave a space at the bottom of the container. On the hollow bottom wall a filling hole 4 which is fused after filling the container with a liquid is formed; the fusion makes the filling hole a sealing part 14.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a synthetic resin sealed container in which a liquid material is sealed.

[0002]

2. Description of the Related Art As a means for filling a synthetic resin container with a liquid material and then sealing the container until it is used, there is known one in which a seal or packing is inserted into a cap screwed into a container mouth. Has been. (For example, Japanese Utility Model Laid-Open No. 61-183846) It is also known to insert an inner plug into the mouth of a container and lock it with a palate so that it cannot be removed. (For example, actual exploitation 63-15696
1 gazette, actual development Sho 63-180556 gazette, actual development sho 63-183058
Issue)

[0003]

SUMMARY OF THE INVENTION In a synthetic resin container in which an inner plug is fitted in the mouth or a palate is screwed, the elastic force of the resin is used to tightly fit it, but a strong impact is generated during movement. When it is subjected to a strong vibration or violent vibration, there is a problem that the fitting of the plug body is loosened and the screwing of the palate is loosened. In particular, when filling a liquid material, there is a problem that the plug body must be strongly pressed and fitted so that the liquid material does not leak out, and the palate must be strongly screwed.

Further, since the mouth of the container has a small diameter, there is a problem that it takes a long time to fill the liquid while the air in the container is discharged from the mouth. Therefore, the present invention has been made in view of the above problems of the prior art, and an object of the present invention is to make a synthetic resin that can be easily filled with a liquid substance and can completely seal the mouth. To provide a sealed container.

[0005]

In order to achieve the above object, the synthetic resin hermetically sealed container of the present invention has an inlet part having a diameter larger than the inner diameter of the mouth part, and an elastic material at the inlet part. Insert the plug body of to close the container mouth with the plug body,
A filling port is provided at the bottom of the container, the inside of the filling port is filled with a liquid material, and then the filling port is welded to form a sealing portion.

[0006]

EXAMPLE The structure of the synthetic resin hermetically sealed container according to the present invention will now be described with reference to FIG. 1. The hermetically sealed container 1 is larger than the inner diameter R of the mouth at the tip of the container mouth 2 continuous with the body 11. Diameter entrance
12 is provided, and at the same time when the container 1 is blow-molded, the stopper body 6 made of an elastic material is inserted into the inlet portion 12, and the container mouth portion 2 is inserted by the stopper body 6.
On the other hand, the filling port 4 is provided in the container bottom portion 3 while the filling port 4 is filled with the liquid material W and then welded to form the sealing portion 14.

The size of the inlet portion 12 provided at the tip of the container mouth portion 2 is formed according to the mouth portion inner diameter R. For example, when the mouth portion inner diameter R is small, it is slightly larger than the mouth portion inner diameter R. Although it may be formed, the larger the inner diameter R of the mouth portion, the larger and deeper it must be formed. The stopper body 6 is formed of rubber or synthetic resin having elasticity into a disc shape, or the stopper groove 16 of the stopper body insertion cylinder S is formed at the center of the surface of the disc-like stopper body 6.
To form. At least the outer peripheral surface of the plug body 6 is covered with the synthetic resin film 7
And the synthetic resin film 7 is coated with
It is also possible to be able to weld with 12.

The filling port 4 provided on the bottom 3 of the container has a diameter larger than that of the container opening 2 and projects in the direction opposite to the opening 2. The filling port 4 is heat-welded after filling the liquid material W to form the sealing portion 14. As shown in FIG. 5, a concave bottom wall 13 is provided at the center of the bottom 3 of the container,
While forming the space portion A by the concave bottom wall 13, if the concave bottom wall 13 is provided with the filling port 4 for welding after filling the liquid material W, the filling port 4 welded after filling the liquid material W is sealed. It is also possible to lay down the part 14 in the space A and erect the sealed container 1.

The container bottom portion 3 in FIGS. 4A and 5A is
Through-holes 15 are formed in the sealing portion 14 when the filling port 4 is welded to form the sealing portion 14. FIG. 4 (B) and FIG.
In the container bottom portion 3 of (B), when the filling port 4 is welded to form the sealing portion 14, the hook portion 5 having a hook shape is formed in the sealing portion 14.

Since the synthetic resin hermetically sealed container according to the present invention has the above-mentioned structure, first, the mold B having the container cavity C is formed.
As shown in FIG. 2, molds 1 and B2 are opened to the left and right, and the plug 6 is inserted into the opening C of the cavity C where the mold is opened by the cylinder S, and the molds B1 and B2 are clamped to set the plug 6. After that, if the hermetically sealed container 1 is blow-molded in the conventional manner, the inlet portion 12 is formed at the tip of the container mouth portion 2 and, at the same time, the plug body 6 is inserted into the inlet portion 12.

Next, as shown in FIG. 3, the liquid material W is filled inside the container through the filling port 4 provided in the bottom 3 with the container bottom 3 having the container mouth 2 closed by the plug 6 facing upward. After filling, the filling port 4 is heat-welded to close the container bottom portion 3 and form the sealing portion 14. Since the inlet portion 12 of the container mouth portion 2 is formed by using the stopper 6 as a male type, the tightness of the stopper 6 and the inlet portion 12 is ideal. Further, depending on the material of the plug body 6, a part of the plug body 6 may be welded to the inlet portion 12.

The synthetic resin hermetically sealed container of the present invention is not limited to the above embodiment. For example, if the recess 6a is formed in the outer peripheral portion of the back surface of the plug 6 as shown in FIG. Department
The locking force of 12 increases, and it becomes more difficult to loosen and remove the plug 6. Further, the inlet portion 12 provided in the container mouth portion 2 and the container bottom portion 3
Filling port 4 provided in the container, and a sealing portion formed by welding the filling port 4
The shape and structure of the plug body 6 to be inserted into the inlet 14 and the inlet portion 12 can be appropriately changed without departing from the gist of the present invention.

[0013]

Since the synthetic resin hermetically sealed container according to the present invention has the above structure, the following effects can be obtained. Since the plug is inserted into the mouth of the container at the same time when the sealed container is formed, the tightness between the mouth and the plug is significantly improved as compared with the case where the plug is inserted later. As a result, the stopper does not loosen even if it receives a strong shock or a strong vibration during the movement, and thus it is most suitable as a container for filling a liquid substance.

Particularly, it is useful as a hermetically sealed container for a drug solution or Ringer's solution in which a pipe is inserted into a plug without removing the plug and the liquid substance is directly taken out from the pipe. Further, since the filling port having a diameter larger than that of the mouth is provided at the bottom of the container and the liquid is filled into the inside from the filling port, the filling time can be remarkably shortened as compared with the case of filling the liquid from the mouth. In a sealed container having a space at the bottom of the container, there is also an advantage that the sealing part with the filling port welded can be laid down in the space.

[Brief description of drawings]

1 (A) and (B) are a partially cutaway front view and a side view showing the structure of a synthetic resin hermetically sealed container of the present invention.

FIG. 2 is a cross-sectional view showing an insert example of (A) and (B) plugs and an example of forming a sealed container.

3 (A) and (B) are cross-sectional views showing an example of filling a liquid material and an example of forming a sealing portion.

FIG. 4 is a front view showing an example of the structure of (A) and (B) sealing sections.

5 (A) and 5 (B) are cross-sectional views showing a structural example of a bottom portion.

FIG. 6 is a cross-sectional view showing a structural example of the plug body of (A) and (B).

[Explanation of symbols]

1 Sealed Container 2 Container Portion 3 Container Bottom 4 Filling Port 5 Hook 6 Plug 12 Inlet, 13 Recessed Bottom Wall, 14 Sealing Portion, 15 Through Hole, 16
Recessed groove A Container bottom space, W Liquid B1, B2 mold, C cavity, S Plug insertion cylinder R Inner diameter

Claims (3)

[Claims] 1. A sealed container made of synthetic resin, wherein a stopper (6) made of an elastic material having a diameter larger than the inner diameter (R) of the mouth is inserted into the mouth (2) of the container. 2. The container bottom (3) is provided with a filling port (4),
A synthetic resin hermetically sealed container, the filling port of which is filled with a liquid material (W) and then welded to form a sealing portion (14). 3. The container mouth (2) is provided with an inlet (12) having a diameter larger than the inner diameter (R) of the mouth, a plug (6) is inserted into the inlet, and the inside of the container bottom (3) is inserted. Concave bottom wall that bites into (13)
The synthetic resin sealing according to claim 1 or 2, wherein the container is provided with a space (A) at the bottom and a filling port (4) is provided on the concave bottom wall for welding after filling the liquid material (W). container.