JPS6340691Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an airtight self-opening lip seal used for airtight containers in equipment for producing radioactive substances such as plutonium, genetic recombination facilities, equipment for producing fine powder, and the like.

In this specification, regarding internal and external relations,
With reference to the figure, the direction toward the center of the lid of the container, that is, the left direction in the figure, is referred to as inward, and the opposite direction is referred to as outward.

Generally speaking, in a lip seal, when the pressing surface of the lip seal is pressed against the sealing surface of the object to be sealed during sealing, negative pressure is generated between both surfaces and the pressing surface is attracted to the sealing surface. They often don't go away.

This invention was made in view of the above-mentioned circumstances, and the object is to provide an airtight self-opening lip seal that can be easily separated from the sealed object when the seal is released.

In the lip seal according to this invention, at least the lip part is made of an elastic material, a protrusion is provided along the length on one sealing surface of the lip part, and a negative pressure is applied through the lip part toward the proximal end of the protrusion. A ventilation hole was drilled for the purpose of eliminating the problem.

Examples of this invention will be described in detail below.

1 and 2, the lip seal according to this invention is made of an elastic material, that is, rubber, and includes a first container body 2 having an inner circumferential surface 1 tapered upward, and an outer circumferential surface 3 tapered downward. a first container 5 consisting of a first lid body 4 having a shape, and a second container body 12 having a tapered inner peripheral surface 11;
and a second container 15 comprising a second lid 14 having a tapered outer peripheral surface 13. As shown in FIG. 1, these containers 5 and 15 are a combination of a first container body 2 and a first lid 4;
And the combination of the second container main body 12 and the second lid body 14 can not only be connected to or separated from each other, but also
As shown in FIG. 2, the combination of the first container main body 2 and the second container main body 12 and the combination of the first lid 4 and the second lid 14 are configured so that they can be connected to or separated from each other. The first lid 4 is provided with an upper sealing member 21 that seals between it and the first container body 2 and between the first lid 4 and the second lid 14. The main body 12 is provided with a lower seal member 31 that seals between the main body 12, the first container main body 2, and the second lid 14, respectively.

The upper sealing member 21 includes a thick plate-shaped mounting leg 22 facing inward and upward, a head 23 provided at the lower end of the mounting leg 22 , and a horizontal lower surface 6 of the first lid 4 inside the leg 22 . Horizontal lip part 2 provided along
4, and a tapered lip portion 25 provided on the outside of the head 23 along the tapered outer peripheral surface 3 of the first lid body 4.
The leg portion 22 is attached to the first lid body 4 by being tightly embedded in a mounting groove 26 provided in a lower inner corner portion of the first lid body 4 so as to face diagonally upward inward. The pair of lip portions 24 and 25 are bent in a substantially dogleg shape in cross section, and each bent surface 8 is bent at the first
It is provided so as to face the tapered outer circumferential surface 3 and the horizontal lower surface 6 of the lid body 4. A protrusion 27 is provided near the tip of each bent protrusion 8 along the circumferential direction. Also, a pair of lip portions 24, 25
Between the protrusion 27 and the head 23,
A plurality of ventilation holes 28 for eliminating negative pressure are provided at required intervals in the circumferential direction.

On the other hand, the lower sealing member 31 has a block-shaped mounting leg 32 and a head 3 provided at the upper end of the leg.
3 and the horizontal upper surface 7 of the mounting member 36 on the outside of this.
It consists of a horizontal lip part 34 provided along the inside of the head 33 and a tapered lip part 35 provided along the tapered inner circumferential surface 11 of the second container main body 12, The seal member 31 is
The block-shaped legs 32 are fitted into the recesses of the attachment member 36 and are attached to the second container body 12 by being press-fitted to the outer peripheral surface of the upper end of the second container body 12. The pair of lip portions 34 and 35 are also bent in a substantially dogleg shape in cross section, and each bent surface 8 faces the tapered outer circumferential surface 13 of the second container body 12 and the horizontal upper surface 7 of the mounting member 36, respectively. It is set up like this. A protrusion 37 is provided near the tip of each bent protrusion 8 along the circumferential direction. Furthermore, a plurality of ventilation holes 38 for relieving negative pressure are also provided at required intervals in the circumferential direction between the protrusion 37 and the head 33 of the pair of lip portions 34 and 35, respectively.

Next, the operation of the above configuration will be explained.

FIG. 1 shows the sealed state when the first container 5 and the second container 15 are connected and separated.

In FIG. 1A, both the outside of the first container 5 and the inside of the second container 15 are contaminated zones,
The area between the first container 5 and the second container 15 is a non-contamination zone. Then, the upper seal member 21 closes the first
A complete seal is formed between the lid 4 and the first container body 2 and between the first lid 4 and the second lid 14, and the lower sealing member 31 seals the second container body 1.
2 and the first container body 2 and the second container body 12
and the second lid body 14 are completely sealed. In this sealed state, the horizontal lip portion 24 of the upper seal member 21 is elastically deformed from the released state shown in FIG. 1C to the pressed state shown in FIG. Projection 2 on the lower surface 6 of
7 and is pressed against the upper surface 9 of the second lid 14 at its tip. Further, the tapered lip portion 25 of the member 21 is similarly elastically deformed into the pressurized state shown in FIG. 1 The tip is pressed against the inner circumferential surface 1 of the container body 2. Therefore, as described above, the upper seal member 21 has the following elastic restoring force:
The spaces between the first lid 4 and the first container body 2 and between the first lid 4 and the second lid 14 are completely sealed.

On the other hand, the horizontal lip portion 34 of the lower seal member 31
From the shape of the released state shown in Figure 1C, the first
It is elastically deformed into the pressurized state shown in FIG. The tapered lip portion 35 of the member 31 is also elastically deformed into the pressurized state shown in FIG. , is pressed against the outer circumferential surface 13 of the second lid body 14 at its tip. Therefore, as described above, the lower sealing property is deformed and the protrusion 27 is pressed against the outer circumferential surface 3 of the first lid body 4, and the first container member 31 is , between the second container body 12 and the first container body 2 and the second container body 1
2 and the second lid body 14 are completely sealed.

As a result of the above-described pressure contact, there is a gap between the bent concave surface 18 of the horizontal lip part 24 of the upper sealing member 21 and the upper surface 9 of the second lid body 14, and between the bent concave surface 18 of the tapered lip part 25 and the first container. A negative pressure gap 29 is formed between the inner circumferential surface 1 of the main body 2 and the horizontal lip 3 of the lower seal member 31.
4 and the lower surface 10 of the first container body 2, and between the bent concave surface 18 of the tapered lip portion 35 and the outer peripheral surface 13 of the second lid 14, there are negative pressure gaps 39, respectively. is formed. In FIG. 1B, the second container 15 has been slightly lowered from the state shown in FIG. In FIG. 1B, the sealing state of the first container body 2 by the first lid 4 and the sealing state of the second container body 12 by the second lid 14 are both the same as in FIG. , the horizontal lip portion 24 of the upper seal member 21 and the horizontal lip portion 34 of the lower seal member 31 each attempt to return to their pre-pressurized shapes by elastic restoring force. Since the protrusion 27 of the horizontal lip portion 24 of the upper seal member 21 is separated from the lower surface 6 of the first lid 4, the negative pressure in the gap 29 in the bent concave surface 18 of the lip portion 24 is Also, since the protrusion 37 of the horizontal lip 34 of the lower seal member 31 is separated from the upper surface 7 of the mounting member 36, the negative pressure in the gap 39 in the bent concave surface 18 of the lip 34 is eliminated. is eliminated through the ventilation hole 38. Therefore, the upper horizontal lip portion 24 loses its adhesion force to the upper surface 9 of the second lid body 14.
The lower horizontal lip portion 34 loses its adhesion force to the lower surface 10 of the first container body 2, and the second container 15 can smoothly descend and separate from the first container 5.

In this way, as shown in FIG.
5 is separated. In this state, the first container 5
Since there is still a complete seal between the main body 2 and the lid 4 of the second container 15 and between the main body 12 and the lid 14 of the second container 15, the contamination zone inside the container does not diffuse to the outside.

FIG. 2 shows a sealed state when the lids 4 and 14 of the first and second containers 5 and 15 and the container bodies 2 and 12 are respectively connected.

The state shown in FIG. 2A is the same as the state shown in FIG. 1A.

In FIG. 2B, the lids 4 and 14 in the connected state are slightly raised from the state in FIG. 2A. The sealing condition in FIG. 2B is the same as in FIG. The negative pressure in the gap 29 in the bent concave surface 28 of the lip part 25 is eliminated through the vent hole 28, and the protrusion 37 of the tapered lip part 35 of the lower seal member 31 Since it is separated from the circumferential surface 11, the negative pressure in the gap 39 in the bent concave surface 18 of the lip portion 35 is eliminated through the ventilation hole 38. Therefore, the upper tapered lip portion 25 loses its adhesion force to the inner circumferential surface 1 of the first container body 2, and the lower horizontal lip portion 35
The second lid 14 loses its adhesion to the outer peripheral surface 13, and the lids 4, 14 in the connected state can smoothly descend and separate from the container bodies 2, 12 in the combined state.

In this way, as shown in FIG. 2C, the two are separated. In this state, between the container bodies 2 and 12 connected to each other and the lid bodies 4 and 1 connected to each other,
4 is still completely sealed, so that the contamination zone inside the container does not spread to the outside.

FIG. 3 shows a second embodiment of this invention, in which the lip portion 42 of the seal member 41
As shown in FIG. 1A, the device has a protrusion 43 on the upper surface and a vent hole 44 on the proximal end side of the protrusion 43.

In the sealed state, as shown in FIG. 3B, the protrusion 43 contacts the opposing surface to close the slit 45, creating a negative pressure gap 47 between the sealing member 41 and the object to be sealed 46.

In the sealed state, as shown in FIG. 4A, the protrusion 43 is separated from the opposing surface and the slit 45 is opened, so that the negative pressure in the gap 47 is eliminated through the ventilation hole 44.

As described above, according to this invention, at least the lip portion is made of an elastic material, a protrusion is provided along the length direction on one sealing surface of the lip portion, and the lip portion is disposed on the proximal end side of the protrusion. A vent hole is drilled through the lip to relieve negative pressure, so when the seal is released, the protrusion separates from one object to be sealed, and the negative pressure in the gap between the other object and the lip is released through the vent hole. It can be resolved by Therefore, the lip seal member can be easily separated from the object to be sealed.

[Brief explanation of the drawing]

1A, 2B, 2C and 3A and 3A, 3A and 3B are cross-sectional views of the seal portion of a container showing an embodiment of this invention. 2...first container main body, 12...second container main body,
4...First lid body, 14...Second lid body, 5...First lid body
Container, 15... Second container, 21... Upper seal member, 31... Lower seal member, 41... Seal member, 24, 25, 34, 35, 42... Lip portion, 27, 37, 43... ...projection, 28, 38, 4
4...Vent hole, 36...Mounting member, 29, 39,
47... Gap.

Claims (1)

[Scope of utility model registration request] At least the lip part is made of an elastic material, a protrusion is provided along the length on one sealing surface of the lip part, and a vent hole for relieving negative pressure is provided on the proximal end side of the protrusion, passing through the lip part. Opened, airtight self-release lip seal.