JPH0124609Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an airtight seal device, and more specifically, the invention has openings in first and second surfaces that intersect each other, and intersects each other at the intersection of the first and second surfaces. The present invention relates to an airtight sealing device that airtightly seals the internal space of a member having first and second openings from the outside of the member.

The interior space of a member having first and second openings that are opened in first and second surfaces that intersect with each other and that intersect with each other at the intersection of the first and second surfaces is made airtight from the outside of the member. To seal the
Generally very difficult.

For example, in a leakage test to determine whether or not a cylinder block of an automobile engine has a small hole, such as a blow hole, that communicates from the crank chamber or cylinder bore to the outside of the cylinder block, the crank chamber and cylinder bore are inspected. The cylinder block is hermetically sealed from the outside and the pressure change of the compressed air sealed inside the cylinder block is measured, or the cylinder block thus airtightly sealed is immersed in water, etc., and the compressed air becomes bubbles and the cylinder block Tests are being conducted to see if it leaks outside. In this case, the crank chamber is generally sealed by pressing a first rubber-like elastic sealing material having a protrusion that fits into the end opening of the cylinder block against the bottom of the cylinder block. Then, a second rubber-like elastic sealant is pressed against each end face of the cylinder block to seal the opening on the end face of the cylinder block of the crank chamber between the protrusion of the first rubber-like elastic sealant and the second rubber-like elastic sealant. This is done by sealing with an elastic sealing material.

However, since the crank chamber opens at the bottom and both end faces of the cylinder block, and these openings intersect with each other at the intersection of the bottom and end faces of the cylinder block, an elastic seal is formed at the intersection. This results in insufficient compression of the material, which tends to result in incomplete seals at the intersection. That is, the dimensional accuracy of the first rubber-like elastic sealing material and the variation in the dimensions of the cylinder block, the positioning accuracy of the first rubber-like elastic sealing material with respect to the cylinder block, and the positioning accuracy of the first rubber-like elastic sealing material on the bottom surface of the cylinder block. Due to the difference in the degree of expansion of both ends when pressed against the cylinder block, both end surfaces of the first rubber-like elastic sealing material do not necessarily align with both end surfaces of the cylinder block, and the first rubber-like elastic sealing material Since sufficient compressive force does not necessarily act on the protrusions of the sealing material, even if the second rubber-like elastic sealing material is pressed against the end surface of the cylinder block and the end surface of the first rubber-like elastic sealing material, the first rubber-like elastic sealing material It is difficult to completely airtightly seal between the end face of the rubber-like elastic sealing material and the second rubber-like elastic sealing material. Additionally, if the protrusion that fits into the end opening is formed integrally with the first rubber-like elastic sealing material, if the protrusion deteriorates, the entire first rubber-like elastic sealing material must be replaced. As a result, maintenance costs are high.

The present invention covers an internal space of a member having first and second openings that are opened in first and second surfaces that intersect with each other, and that intersect with each other at the intersection of the first and second surfaces. In view of the above-mentioned problems when sealing a member airtightly from the outside, we have developed an airtight seal that can easily and completely airtightly seal two openings that intersect with each other, and that has low maintenance costs. The purpose is to provide equipment.

According to the present invention, this object has first and second openings that are opened in first and second surfaces that intersect with each other, respectively, and that intersect with each other at the intersection of the first and second surfaces. an airtight sealing device for airtightly sealing an internal space of a member from the outside of the member, a first rubber-like elastic sealing material having an abutment surface that airtightly engages the first surface; a first pressing means for pressing one rubber-like elastic sealing material against the first surface; and a first pressing means for pressing the first rubber-like elastic sealing material against the first surface; a closing means that fits into the second opening when pressed against the first surface; and a second surface having an abutment surface that engages the second surface and one end of the first rubber-like elastic sealing material. A sealing device comprising: a second rubbery elastic sealing material; and a second pressing means for pressing the second rubbery elastic sealing material against the second surface and one end of the first rubbery elastic sealing material. achieved by.

According to this configuration, the closing means carried by the first pressing means fits into the second opening when the first rubber-like elastic sealing material is pressed against the first surface by the first pressing means. As a result, the sealing material is compressed between the wall surface of the second opening and the first rubber-like elastic sealing material, so that the closing means is compressed by the first rubber-like elastic seal material due to the reaction force received from the wall surface of the second opening. The sealing material is pressed, so that the first rubber-like elastic sealing material is sufficiently compressed also in the vicinity of the second opening. Therefore, by pressing the second rubber-like elastic sealing material against the second surface and the end face of the first rubber-like elastic sealing material in this state, the second rubber-like elastic sealing material is closed to the second opening. to make good contact with the second surface and the end surface of the second rubber-like elastic sealing material around the part,
This allows the first and second openings to be completely hermetically sealed.

Also, as described above, the first rubber-like elastic sealant is pressed against the first surface, and then the second rubber-like elastic sealant is pressed against the second surface and the end surface of the first rubber-like elastic sealant. Since the first and second openings can be completely airtightly sealed by simply pressing, the interior space of the member having the first and second openings that intersect with each other as described above can be easily sealed from the outside. It is possible to automate cylinder block leakage measurement, etc.

Furthermore, if the closing means is removably supported by the first pressing means, even if the closing means deteriorates, it is only necessary to replace the closing means, so that the maintenance cost of the airtight sealing device can be kept low. I can do it.

In the airtight sealing device according to the present invention, the rubber-like elastic sealing material has a surface layer made of a sealing material that is relatively easily deformed, and a lower layer made of an elastic material that is relatively difficult to deform elastically. Alternatively, the entire rubber-like elastic sealing material may be fixed to the corresponding pressing means by adhesive or other means. The closing means may be made of metal or other rigid body, but is preferably lined with an elastic material similar to the first and second rubber-like elastic sealing materials.
Furthermore, the pressing means may be provided with a bulge suppressing plate that suppresses excessive expansion of the end portion when the rubber-like elastic sealing material is pressed against the corresponding surface by the corresponding pressing means. .

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the accompanying drawings.

FIG. 1 is an illustrative perspective view showing a cylinder block whose internal space is to be sealed from the outside by the airtight sealing device according to the present invention, with the cylinder block arranged upside down, and FIGS. 2 and 3 are FIG. 2 is an illustrative front view showing one embodiment of the airtight sealing device according to the present invention, which is configured to airtightly seal the internal space of a cylinder block from the outside, in a non-sealed state and a sealed state, respectively.

In these figures, reference numeral 1 designates a cylinder block, which has an internal space 4 consisting of a crank chamber 2 and a plurality of cylinder bores 3. The crank chamber 2 of the interior space 4 has a substantially semi-cylindrical shape, with cylinder blocks 1 intersecting each other.
A bottom side opening 10 and two end side openings 11 and 1 which are open at the bottom surface 5 and both end surfaces 6 and 7 and intersect with each other at intersections 8 and 9 of the bottom surface 5 and end surfaces 6 and 7.
2. Opening 10 has a substantially rectangular shape, and openings 11 and 12 have a substantially semicircular shape so as to be able to receive a crankshaft, not shown in the figures. The cylinder bores 3 of the internal space 4 also each have a circular opening 1 opened at the top surface 13 of the cylinder block 1.
It has 4. The illustrated embodiment of the airtight sealing device according to the present invention, which is configured to airtightly seal the internal space 4 of the cylinder block from the outside, has a bottom side opening 10 of the crank chamber 2 that airtightly seals the bottom side opening 10 of the crank chamber 2. an opening sealing member 15;
Two end face opening sealing members 16 and 17 that hermetically seal the end face openings 11 and 12 of the crank chamber 2, respectively; and a cylinder bore opening sealing member 18 that hermetically seals the opening 14 of the cylinder bore 3. It's getting more familiar.

The bottom side opening sealing member 15 includes a first rubber-like elastic sealing material 20 having an abutment surface 19 that airtightly engages with the bottom surface 5 of the cylinder block 1, and a first rubber-like elastic sealing material 20 that is attached to the bottom surface of the cylinder block 1. When the first rubber-like elastic sealing material 20 is pressed against the bottom surface 5 by the pressing means 21, the end surface side openings 11 and 1 are pressed against the bottom surface 5, respectively.
a closure member 22 configured to fit into 2;
3, and brackets 26 and 27 which are removably fixed to the pressing means 21 at one end by bolts 24 and 25 and carry closure members 22 and 23 at the other end. In this embodiment, the closing members 22 and 23 are made of a rigid body such as steel, and are removably supported at the tips of the brackets 26 and 27 by screws or the like not shown in the drawings.

The pressing means 21 includes a pressing plate 28 carrying a rubber-like elastic sealing material 20, and a stem 29 integrally fixed to the pressing plate and connected to a pressing device such as a hydraulic cylinder (not shown). It's summery.

The end face side opening sealing members 16 and 17 include second rubbery elastic sealants 30 and 31 and pressing means 3 for pressing the rubbery elastic sealants 30 and 31 against the end faces 6 and 7 of the cylinder block 1, respectively.
2 and 33, and the rubber-like elastic sealing materials 30 and 31 are respectively attached to the corresponding end surfaces 6 and 7 of the cylinder block and the corresponding end surfaces of the rubber-like elastic sealing material 20 of the bottom opening sealing member 15. It has mating abutment surfaces 30' and 31'.
In this case, in order to more reliably seal the end openings 11 and 12, the contact surfaces 30' and 31' of the rubber-like elastic sealing materials 30 and 31 contact the end surfaces 22' of the closing members 22 and 23, respectively. and 2
3'.

Pressing means 32 and 33 are integrally fixed to pressing plates 34 and 35 that press rubber-like elastic sealing materials 30 and 31 against end faces 6 and 7, respectively, and are not shown in the figure. A stem 36 connected to a pressurizing device such as a hydraulic cylinder.
and 37.

The cylinder bore opening sealing member 18 is attached to the base 3
8 and a plate 39 fixed on the plate 3
A rubber-like elastic sealing material 41 is fixed to the cylinder block 9 by adhesive or other means and has a contact surface 40 that airtightly engages with the top surface 13 of the cylinder block 1. 4
1, and its top surface 13 is pressed against the contact surface 40 of the rubber-like elastic sealing material 41 by its own weight and the pressing force of the bottom opening sealing member 15, thereby closing the opening of the cylinder bore 3. Part 1
4 is hermetically sealed. The base 38 also has a positioning device 4 for properly positioning the cylinder block 1 with respect to the airtight seal device.
2 is provided.

In order to airtightly seal the internal space of the cylinder block from the outside of the cylinder block using the airtight sealing device of the present invention configured as described above, first, as shown in FIG. 18 rubber-like elastic sealing material 4
The cylinder block 1 is placed at a predetermined position on the cylinder block 1 so that its top surface 13 is airtightly engaged with the abutting surface 40, and then the bottom opening sealing member 15 is placed on its end surface with its closing members 22 and 23 respectively. Side opening 11
and 12 and pressed against the bottom surface 5 of the cylinder block 1 to seal the opening 10, and the rear end side opening sealing members 16 and 17 are used to seal the end surfaces 6, 7 and the bottom side opening of the cylinder block 1, respectively. Rubber-like elastic sealant 20 of member 15
is pressed against the end faces 43 and 44 of the crank chamber 4 to airtightly seal the end face side openings 11 and 12 of the crank chamber 4.

In this case, when the rubber-like elastic sealing material 20 is pressed against the bottom surface 5, the closing members 22 and 23 fit into the end-side openings 11 and 12, and the rubber-like elastic seal is closed by the reaction force received from the walls of these openings. As a result, the rubber-like elastic seal material 20 is sufficiently compressed near the end-side openings 11 and 12, and in this state, the end faces 6, 7 of the cylinder block and the rubber-like elastic seal Since the rubbery elastic sealants 30 and 31 of the end side opening sealing members 16 and 17 are pressed against the end faces 43 and 44 of the material 20, respectively, the sealants 30 and 31 are pressed against the end faces 6, 7 and the rubbery elastic sealant 20. The opening 10 and the end openings 11, 12 are in close contact with each other.
is completely hermetically sealed.

Although the present invention has been described above in detail with respect to specific embodiments, the present invention is not limited to these embodiments, and various embodiments are possible within the scope of the present invention. will be clear to those skilled in the art.

[Brief explanation of the drawing]

FIG. 1 is an illustrative perspective view showing a cylinder block whose internal space is to be sealed from the outside by the airtight sealing device according to the present invention, with the cylinder block arranged upside down, and FIGS. 2 and 3 are FIG. 2 is an illustrative front view showing one embodiment of the airtight sealing device according to the present invention, which is configured to airtightly seal the internal space of a cylinder block from the outside, in a non-sealed state and a sealed state, respectively. 1...Cylinder block, 2...Crank chamber,
3... Cylinder bore, 4... Internal space, 5... Bottom surface, 6, 7... End surface, 8, 9... Intersection, 10...
... Bottom side opening, 11, 12... End side opening,
13...Top surface, 14...Cylinder bore opening,
15...Bottom side opening sealing member, 16, 17...
... End side opening sealing member, 18... Cylinder bore opening sealing member, 19... Contact surface, 20...
rubber-like elastic sealing material, 21...pressing means, 22,
23... Closing member, 24, 25... Bolt, 2
6, 27...Bracket, 28...Press plate, 29
... Stem, 30, 31 ... Rubber-like elastic sealing material, 30', 31' ... Contact surface, 32, 33 ... Pressing means, 34, 35 ... Pressing plate, 36, 37 ...
Stem, 38...Base, 39...Plate, 4
0... Contact surface, 41... Rubber-like elastic sealing material, 4
2... Positioning device, 43, 44... End surface.

Claims (1)

[Scope of utility model registration request] The internal space of a member having first and second openings that are open in first and second surfaces that intersect with each other and that intersect with each other at the intersection of the first and second surfaces is accessed from the outside of the member. an airtight sealing device that airtightly seals, a first rubbery elastic sealing material having an abutment surface that airtightly engages with the first surface; a first pressing means for pressing against the first surface; and the first rubber-like elastic sealing material supported by the first pressing means is pressed against the first surface by the first pressing means. a second rubbery elastic sealant having a closing means that fits into the second opening; a second rubbery elastic sealant having an abutment surface that engages the second surface and one end of the first rubbery elastic sealant; a second pressing means for pressing a second rubbery elastic sealing material against the second surface and one end of the first rubbery elastic sealing material.