JPS6344460A - Sealing system - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a sealing method for maintaining airtightness between an airtight container and its lid, and particularly relates to a large lid.

It relates to a sealing method applied to doors, etc.

[Prior Art] Conventionally, as a sealing method for maintaining airtightness between a lid 1 and an airtight container 2 as shown in FIG.
There are two methods: a ring method and an inflated pull sheet method.

In the method using an O-ring, as shown in Fig. 6, the airtight container 2 is
A flange 3 is provided around the end surface of the lid 1, and a groove 4 is provided in the lid 1 opposite to the flange 3. An O-ring 5 is held between the flange 3 and the lid 1 in the groove 4, and the lid 1 and the flange 3 and fix with screws 6. The screws 6 are placed around the entire circumference at two equal intervals as shown in FIG.

Also, there is a method using an inflatable sheet.

As shown in FIG. 9, air is supplied from a compressor to the hollow inflatable pull sheet 7 in the airtight part to inflate it and bring it into close contact with the door sheet 8 provided on the lid 1 side. Note that 2M1 and the airtight container 2 are fixed with latch pins 9.

[Problems to be Solved by the Invention] The conventional sealing method described above has the following drawbacks. That is, as the lid 1 becomes larger, the accuracy of the airtight gap decreases due to deformation of the lid 1 itself, lower processing accuracy, and the like. On the other hand, the nitrile rubber used for O-ring 5,
Butyl rubber, chloroprene rubber, etc. have excellent tensile strength and abrasion resistance, but they are harder than ordinary rubber, and because the O-ring 5 does not have a cavity inside, it is difficult to deform and is susceptible to changes in the airtight gap. I can't handle it anymore. Figure 8 shows a case where the airtight part created by the O-ring 5 is broken, and the lid 1 is distorted due to the pressure difference between the inside and outside, and a gap a is created between the screws 6 and 6, which exceeds the crushing allowance of the O-ring 5. Gas will enter and exit from this gap a.

Next is the method using inflatable sheets.

Although the hollow inflatable sheet 7 is inflated by supplying air from a compressor and brought into close contact with the airtight part, even if the gap in the airtight part changes somewhat, it can be accommodated by adjusting the size of the sheet 7.

However, this method requires peripheral devices such as a compressor and a regulator, and therefore has drawbacks such as a complicated structure, increased weight, and increased cost.

[Means for Solving the Problems and Their Effects] The present invention solves the above problems in a sealing method that maintains airtightness between the airtight container and the lid. A groove is provided in both or one of the airtight container and the lid along the gap, a rubber tube filled with oil is embedded in the groove, and the tube is sandwiched between the lid and the airtight container. The tube is easily deformable and changes in response to changes in the gap between the airtight parts.

[Example] An example of the present invention will be described below with reference to two drawings. Fig. 2 shows the entire structure of the airtight assembly using the sealing method of the present invention, Fig. 1(a) is an enlarged view of the main part A, and Fig. 1(b)
) is a sectional view showing the structure of the tube. A groove 11 is provided on the periphery of the lid 1.

In this groove 11, the rubber tube 12 is inserted into the seal 13.
It has a structure in which it is sandwiched between the lid 1 and the airtight container 2 with a and 13b interposed therebetween. A flange 14 for guiding the rubber tube 12 is provided on the outer periphery of the end of the airtight container 2.

The rubber tube 12 is filled with oil 15 inside. As this oil 15, for example, hydraulic oil used in aircraft hydraulic equipment is used, and by using this type of oil, it can be used without freezing even at a low temperature of -54°C.

In such a sealing method, since the rubber tube 12 has a cavity inside and is filled with oil 15, it is more easily deformed than a conventional O-ring and can easily respond to changes in the gap in the airtight part. Furthermore, since it does not expand or compress even if there is a change in the surrounding air pressure, a device such as a compressor is not required.

FIGS. 3 and 4 each show a case where there is a possibility that the airtightness between the airtight container 2 and the lid 1 will be broken. FIG. 3 shows a case where the airtight container 2 is deformed, and FIG. 4 shows a case where the lid 1 is deformed. When the gap between the lid 1 and the airtight container 2 exceeds the crushing margin of the rubber tube 12, gas is released. It will come and go. In either case, the crushing margin of the rubber tube 12 can be larger than that of a conventional O-ring.

The effect of deformation on tightness is significantly smaller than when using an O-ring.

In the above embodiment, the groove 11 is provided on the lid 1 side, but the present invention is not limited to this.

Of course, it may be provided on the airtight container 2 side, or may be provided on both the lid 1 and the airtight container 2.

[Effects of invention According to the sealing method of the present invention as described above.

Since the rubber tube filled with oil is sandwiched between the airtight container and the lid, it can easily handle deformation. It has the effect of being able to completely maintain airtightness even if it is deformed. In addition, since additional equipment such as a compressor is not required, the structure is simple.
Lighter weight and lower cost can be achieved.

[Brief explanation of drawings]

FIG. 1 shows a sealing system according to an embodiment of the present invention. FIG. 1(a) is a sectional view showing a part of the airtight part, FIG. Figure 2 is a cross-sectional view of the airtight assembly, Figure 3 is a diagram for explaining how the rubber tube corresponds to the deformation of the airtight container shown in Figure 1(a), and Figure 4 is a diagram showing the deformation of the lid. Figure 5 is an exploded perspective view of the airtight container, Figure 6 is a sectional view showing the conventional sealing method, Figure 7 is a perspective view of the same, and Figure 8 is the airtight container shown in Figure 6. A sectional view showing a broken state, and FIG. 9 is a sectional view showing another conventional sealing method. 1... Lid, 2... Airtight container, 11... Groove, 12...
...Rubber tube, 13a, 13b...Seal,
14...flange, 15...oil. Applicant sub-agent Patent attorney Takehiko Suzue (a)
(b) Figure 1 2t2! 31st! I Figure 4 Figure 6

Claims (1)

[Claims] In a sealing method that maintains airtightness between an airtight container and its lid, the airtight container and/or the lid is sealed along a gap between the airtight container and the lid. A groove is provided on one side,
A sealing method characterized in that a rubber tube filled with oil is embedded in the groove, and the tube is sandwiched between the lid and the airtight container.