JP3450317B2 - Container sealing device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for sealing the mouth of a container in a leak test of the container.

[0002]

2. Description of the Related Art In a leak test of a container, it is common to seal the mouth of the container, pressurize or depressurize the inside of the container, and then observe the pressure change. Since the shape of the mouth of the container is formed in various shapes, a separate sealing member that fits the mouth of the target container was prepared. Further, since the pressure observing sensor and the probe were also required to be airtight, the probe was attached to each container shape.

[0003]

Conventionally, since the sealing member is individually changed according to the shape of the mouth of the container and the probe of the sensor is individually attached, the sealing work is troublesome and the sealing operation is difficult. The number of types of materials for the product also increased, leading to higher costs.

[0004] Therefore, an object of the present invention is to provide a container sealing device which can cope with container mouths of various shapes and is excellent in sealing property, and in which a sensor probe or the like can be easily attached while keeping airtightness. To do.

[0005]

[Means for Solving the Problems]
Therefore, the present invention provides a dual expansion that can be expanded outward by the injection of fluid.
Attach both ends of the tube with end opening to the base, then attach to the base
A passage is provided in the substrate to supply and discharge the fluid in the enclosed tube.
Form and seal the inner surface of the container mouth with an expanded tube
In front of the substrate in order to connect the inside of the container and the outside of the substrate.
Form a communication path that is independent of
Attach one end of the tube, which is the tip side when inserting
The diameter of the base part to be attached to the other end of the tube
Formed in a small-diameter portion smaller than the diameter of the base body
A communication passage is formed to form a part of the passage in the passage for supplying and discharging fluid.
Insert the communication pipe to be formed only in the passage, leaving a gap.
At least both ends on the outer peripheral side of the communication pipe outside the road are sealed.
It is a

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings.

In the embodiment shown in FIG. 1, both ends of a tube 1 having both end openings which can be expanded by injecting a fluid are attached to a base body 2. As shown in FIG. 2, one end side 1A of the tube 1 is attached to the base body 2 by an attachment ring 3, and the tube 1
After the one end side 1A is attached, the tube 1 is folded back (folded portion 1C), and the other end side 1B is attached to the base body 2 by the attachment ring 4. A passage 5 is formed in the base body 2 for supplying and discharging a fluid in the tube 1 attached to the base body 2. The inlet / outlet 7 for supplying / discharging the fluid into / from the passage 5 is formed in a direction orthogonal to the axis of the passage 5. Further, as shown in FIG. 1, in order to connect the inside of the container 10 and the outside of the base 2 with the mouth 11 of the container 10 sealed by the expanded tube 1, a communication pipe 12 having a communication passage 8 in the base 2 is provided. It is inserted in the hole 2C. By attaching a sensor probe or the like in a sealed state to the entrance / exit 9 of the communication passage 8, the container 10
It is possible to observe the pressure inside.

The tip side of the base body 2 is formed in a small diameter portion 2A, and the side to which the attachment ring 4 is fixed is formed in a large diameter portion 2B. The diameter of the outer peripheral surface of the portion where the tube 1 fixed to the small diameter portion 2A by the mounting ring 3 is folded back and rises,
The relationship between the small-diameter portion 2A and the large-diameter portion 2B is set so that the diameter of the outer peripheral surface of the tube 1 fixed by the attachment ring 4 becomes substantially the same. In addition, the folded portion 1C of the tube 1
It is set to have a predetermined distance in a free state between the tube and the fixed portion on the upper end side of the tube 1. In addition, since a predetermined distance is maintained between the outer peripheral surface of the small diameter portion 2A and the inner peripheral surface of the tube 1, the tube 1 can be uniformly expanded between the both mounting rings 3 and 4.

The communicating pipe 12 has a hole which penetrates to both ends thereof, that is, a communicating passage 8. Also, the communication pipe 1
2 has a predetermined length of a portion that is inserted into the base 2 and is formed in the small diameter portion 12A, and the hole 2C of the base 2 is smaller than the outer diameter of the small diameter portion 12A.
A large inner diameter is formed, and a passage 5 is formed between the outer peripheral surface of the small diameter portion 12A and the inner peripheral surface of the hole 2C of the base 2.
The communicating tube 12 projects from both ends of the base body 2, and the points A and B that contact both end portions of the base body 2 are sealed by means such as silver brazing. In this embodiment, one hole 2C penetrating from one end to the other end is formed in the base body 2, and the inlet / outlet 7 for supplying / discharging the fluid and the communication port 13 for supplying / discharging the fluid into / from the tube 1 are provided in the base body 2. Are formed on the respective side surfaces of the base body 2, and the communication pipe 12 is inserted into a hole 2C penetrating from one end of the base body 2 to the other end, and the places A and B where the communication pipe 12 contacts at both ends of the base body 2 are sealed. The inlet / outlet 7 and the communication port 13 to the tube 1 may be located in the small-diameter portion 12A of the communication pipe 12. This communication pipe 12
Is formed of stainless steel or the like. In this embodiment, only one hole 2C is formed in the base body 2 except for the entrance / exit 7 and the communication port 13, which facilitates processing and allows the base body 2 to have a small diameter.

A rubber tube may be used as the tube 1, and the tube may be cut into a predetermined size before use. Further, a reinforcing material may be embedded in the tube 1. As the reinforcing material, cords of organic fibers such as nylon and polyester are used. Even if the tube 1 containing the reinforcing material is used, since there is a predetermined space between the base body 2 and the tube 1 between the fixing portions at both ends of the tube 1, necessary and sufficient expansion is possible. In addition, by using the tube 1 with openings at both ends, the productivity of the tube 1 itself is high,
The tube 1 can be procured at low cost.

[0011]

As described above, according to the present invention, both ends of the tube having the both end openings which can be expanded outward by injecting the fluid are attached to the base body, and the fluid is supplied to and discharged from the tube attached to the base body. Therefore, a passage is formed in the base body, and in order to make the inside of the container communicate with the outside of the base body in a state where the inner peripheral surface of the mouth of the container is sealed by the expanded tube, a communication passage independent of the passage is formed in the base body, The diameter of the base portion to which one end side of the tube, which is the tip side when inserted into the mouth portion, is attached is formed to be a smaller diameter portion than the diameter of the base portion to which the other end side of the tube is attached, and A communication pipe forming a communication passage for forming a portion in a fluid supply / discharge passage is inserted with a gap only in the passage, and at least both end portions on the outer peripheral side of the communication pipe outside the passage are sealed. For the mouth of the container Seal can be adapted to various shapes of the mouth portion by inflating the tube, and sealing is also made reliable. In addition, it is possible to pressurize or depressurize the inside of the container using the communication passage, and to observe the pressure change inside the container. Therefore, if this communication path is used, it is not necessary to attach a probe of a sensor or the like and change it for each shape of the container. If the sealing device of the present invention is used, the working time can be significantly shortened, the probe of the sensor and the like can be shared, and a low cost sealing device can be provided.

Further, in order to form a part of the communication passage in the passage for supplying and discharging the fluid, the communication pipe forming the communication passage is inserted with a gap only in the passage, and the communication pipe on the outer peripheral side of the communication pipe is provided outside the passage. Since at least both ends are sealed, only one hole needs to be formed in the base except for the entrance and exit and the communication port, which facilitates processing and allows the diameter of the large diameter portion of the base to be small.

Further, one end of the tube is attached to a portion inside from the tip of the small diameter portion of the base body by a mounting ring, then the tube is folded back and the other end side is attached to a portion other than the thin diameter portion of the base body by a mounting ring, In the case where the folded portion of the tube comes out before the tip of the base body, when the fluid is injected into the tube, the folded portion expands so as to be drawn inward, and the tube is separated between the two mounting rings. Uniformly inflates and evenly presses against the inner peripheral surface of the mouth of the container to ensure a reliable seal. Further, due to the presence of the folded portion, even when the insertion position is slightly shifted when the tube is inserted into the mouth portion of the container, the folded portion of the tube hits the mouth portion, so that the mouth portion is not damaged. If the attachment ring is present in the immediate vicinity of the folded portion, the attachment ring may hit the mouth through the tube and damage the mouth.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of the present invention.

FIG. 2 is a sectional view of FIG.

[Explanation of symbols]

1 tube 1A One end side 1B other end 1C folding section 2 base 2A small diameter part 2B large diameter part 2C hole 3,4 mounting ring 5 passages 8 passages 10 containers 11 mouth 12 communication tubes 12A small diameter part

─────────────────────────────────────────────────── --- Continuation of the front page (56) Reference JP-A-3-133789 (JP, A) JP-A-6-8133 (JP, A) JP-A-8-136391 (JP, A) JP-A-5- 203534 (JP, A) Actual opening 57-165598 (JP, U) Actual opening 61-40588 (JP, U) Actual opening 4-33251 (JP, U) Actual opening 4-82458 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) F16J 15/14 G01M 3/26

Claims (2)

(57) [Claims] 1. An inflated tube in which both ends of a tube having openings at both ends which can be expanded outward by injecting a fluid are attached to a base body, and a passage is formed in the base body for supplying and discharging a fluid in the tube attached to the base body. In order to connect the inside of the container to the outside of the base with the inner surface of the mouth of the container sealed, a communication path separate from the above-mentioned passage is formed in the base, and it becomes the tip side when inserted into the mouth of the container. The diameter of the base portion to which one end side of the tube is attached is smaller than the diameter of the base portion to which the other end side of the tube is attached, and part of the communication passage is formed in the fluid supply / discharge passage. A sealing device for a container, wherein a communication pipe forming a communication passage is inserted through the passage with a gap left between the passage and an outer peripheral side of the communication pipe to seal at least both end portions outside the passage. 2. One end side of the tube is attached to a portion inside from the tip of the small diameter portion of the base body with a mounting ring, and then the tube is folded back and the other end side is attached to a portion other than the thin diameter portion of the base body with a mounting ring. The container sealing device according to claim 1, wherein the folded portion of the tube is projected before the tip of the base body.