JPH09329240A - Seal device between end faces of two members - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a fall of a seal ring, which seals in an airtight manner between the end faces of two members brought into abutment against each other, from the end faces of the two members. SOLUTION: By bringing the flat surface part 11A and the annular outer peripheral surface 11C of a seal ring 11 into contact with the bottom 9A and the outer peripheral surface 9C of a ring fit-in groove 9, an area of contact surface between the seal ring 11 and the ring fit-in groove 9 is increased and a friction force generated between the seal ring 11 and the ring fit-in groove 9 is increased. This constitution, since the seal ring 11 is held in the ring fir-in groove 9 by a friction force between the bottom 9A and the outer peripheral surface 9C of the ring fit-in groove 9, adheres the seal ring 11 to the end face 6A on the front side of a rear member 6 and reliably prevents separation of the seal ring from the ring fit-in groove 9.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION
The present invention relates to a sealing device between two member end faces, which is suitable for sealing the end faces of a member in a gas-liquid tight manner.

[0002]

2. Description of the Related Art Generally, in the case of connecting two members having a fluid passage such as a pipe joint, a sealing device for sealing airtightly or liquidtightly between end faces of the two members abutting each other is used. To be

Therefore, as an application target of such a sealing device, FIG. 5 shows a rotary atomizing type coating machine.

In the figure, reference numeral 1 denotes a main body of a coating machine as one side member for spraying a paint toward an object to be coated (not shown), and an air motor (not shown) is provided on the front side of the main body 1 of the coating machine. A rotary atomizing head 2 is provided that atomizes the supplied paint by being driven to rotate. Here, inside the main body 1 of the coating machine, a trigger valve 4 for opening and closing a paint passage 3 for supplying paint to the rotary atomizing head 2, and a previous color paint remaining in the paint passage 3 etc. at the time of color change A dump valve 5 located on the rear side of the coating machine main body 1 is provided adjacent to the trigger valve 4 in order to discharge. Further, in the coating machine main body 1, a trigger valve 4, a dump valve 5, a shaping air ring, an air passage (not shown) through which air supplied to and discharged from an air motor flows, and a rotary atomization via a trigger valve 4. Paint passage 3 through which paint supplied to head 2 flows, paint passage 3 at the time of color change
A large number of fluid passages, such as a thinner passage (not shown), through which thinner is supplied to and discharged from the same are formed.

As shown in FIG. 6, a plurality of passage openings 1B (only one is shown) as opening ends of the respective fluid passages are circumferentially separated from each other on the rear end surface 1A of the main body 1 of the coating machine. Is provided.

Reference numeral 6 denotes a rear member serving as the other member that closes the rear end surface 1A of the main body 1 of the coating machine. The rear member 6 surrounds the passage openings 1B provided in the main body 1 of the coating machine. Has a plurality of fluid passages 7 (only one is shown) spaced apart from each other in the direction, and each of the fluid passages 7 is provided on the front end face 6A of the rear member 6.
A plurality of passage openings 6B (only one is shown) serving as the open ends of the are provided in the circumferential direction at intervals. In addition, a hose (neither shown) connected to an air source, a paint source, or a thinner source is provided on each of the fluid passages 7 on the rear end surface 6C of the rear member 6.
, And a high voltage cable (not shown) is attached.

Reference numeral 9 denotes a ring fitting groove formed on the rear end face 1A of the coating machine main body 1 so as to surround each passage opening 1B.
The ring fitting groove 9 has a flat bottom surface 9 as shown in FIG.
A, an annular inner peripheral surface 9B and an annular outer peripheral surface 9C are formed in an annular shape having a rectangular cross-sectional shape, and a seal ring 10 described later is fitted therein.

Reference numeral 10 denotes a seal ring fitted in the ring fitting groove 9, and the seal ring 10 is formed of an elastic material such as rubber in an annular shape, and is fitted in the ring fitting groove 9 in the state of being fitted therein. A part of the coating machine body 1 projects from the rear end face 1A.

Then, each passage opening portion 1B of the main body 1 of the coating machine.
And the passage opening 6B of the rear member 6 are communicated with each other, the passage opening 1B and the passage opening 6B are aligned with each other, and the rear end face 1A of the coating machine body 1 and the front side of the rear member 6 are aligned. By abutting the end face 6A, the seal ring 1
As shown in FIG. 8, 0 is elastically deformed between the ring fitting groove 9 and the front end surface 6A of the rear member 6.

As a result, the passage opening portion 1 of the main body 1 of the coating machine is formed.
The periphery of the connection portion between B and the passage opening 6B of the rear member 6 is gas-liquid tightly sealed by the seal ring 10, and the passage opening 1B of the main body 1 of the coater and the passage opening 6B of the rear member 6 are connected. It is possible to prevent the fluid from leaking from the portion.

[0011]

By the way, in the above-mentioned conventional sealing device, the ring fitting groove 9 formed around the passage opening 1B of the coating machine main body 1 has a planar bottom surface 9A and an annular inner surface. The seal ring 10 is formed from the peripheral surface 9B and the annular outer peripheral surface 9C with a rectangular cross-sectional shape.
Are formed with a circular cross-sectional shape.

Therefore, the seal ring 10 is elastically deformed between the ring fitting groove 9 and the front end face 6A of the rear member 6.
Has its annular inner peripheral surface in contact with the inner peripheral surface 9B of the ring fitting groove 9 and its annular outer peripheral surface in contact with the outer peripheral surface 9C of the ring fitting groove 9, but has a small contact area because it is a line contact. The frictional force generated between the inner peripheral surface 9B and the outer peripheral surface 9C is also reduced. In addition, the seal ring 10 and the bottom surface 9 of the ring fitting groove 9
Since the contact area with A and the contact area with the seal ring 10 and the front end face 6A of the rear member 6 are substantially equal, the elastically deformed seal ring 10 and the bottom surface 9 of the ring fitting groove 9 are formed.
The adhesion between A and the front end surface 6A of the rear member 6 is also substantially equal.

Therefore, for example, when the rear member 6 is removed from the main body 1 of the coating machine at the time of maintenance or inspection, the seal ring 10 remains attached to the front end face 6A of the rear member 6 as shown in FIG. There is a problem in that it easily separates from the ring fitting groove 9 and falls downward.

As described above, a large number of seal rings 10 are arranged between the passage openings 1B of the coater main body 1 and the passage openings 6B of the rear member 6. For this reason, if a large number of these seal rings 10 fall off when the rear member 6 is removed from the coating machine main body 1, the workability at the time of performing maintenance, inspection, etc. of the coating machine is significantly reduced. There is.

The present invention has been made in view of the above-mentioned problems of the prior art, and it is possible to prevent the seal ring, which seals between the end faces of the two members abutting each other in a gas-liquid tight manner, from dropping from the end faces of the two members. It is an object of the present invention to provide a sealing device between the end faces of two members.

[0016]

In order to solve the above-mentioned problems, the present invention provides a one-sided member having an end face provided with a passage opening, and an end face abutting the end face of the one-sided member. The other side member provided with a passage opening communicating with the portion, a plurality of ring fitting grooves formed on the end surface of the one side member or the other side member so as to surround the passage opening, and the ring fitting Between two member end faces, which are fitted into the groove, and each of which comprises a plurality of seal rings that seal the periphery of the passage opening in a gas-liquid tight manner when the end faces of the one side member and the end faces of the other side collide with each other. It is applied to the sealing device.

The feature of the configuration adopted by the invention of claim 1 is that the ring fitting groove is formed in an annular shape having a flat bottom surface, an annular inner peripheral surface and an annular outer peripheral surface, and the seal ring is A flat surface portion that abuts the bottom surface of the ring fitting groove,
An annular inner peripheral surface facing the inner peripheral surface of the ring fitting groove, an annular outer peripheral surface facing the outer peripheral surface of the ring fitting groove, and the one-side member when fitted in the ring fitting groove Alternatively, it is formed integrally with a projecting portion that projects from the end surface of the other side member and is pressed and deformed when the end surfaces of the other members abut each other.

According to the above construction, when the seal ring is fitted in the ring fitting groove, the flat surface portion of the seal ring abuts the bottom surface of the ring fitting groove, and the annular inner peripheral surface of the seal ring and the annular surface. At least one of the outer peripheral surfaces contacts the inner peripheral surface or the outer peripheral surface of the ring fitting groove with a large contact area. As a result, the frictional force between the seal ring and the ring fitting groove increases, and when the one-side member and the other-side member that collide with each other are separated, the seal ring adheres to the other-side member and the ring. It can be prevented from coming off from the fitting groove.

The invention according to claim 2 is that the protruding portion of the seal ring is formed into a semi-cylindrical shape.

According to the above construction, when the end face of the one side member and the end face of the other side member abut against each other, the flat surface portion and the protruding portion of the seal ring fitted in the ring fitting groove are ring-fitted. Although pressed by the bottom surface of the mating groove and the end surface of the other side member, the contact area between the protruding portion formed in the shape of a kamaboko and the end surface of the other side member is the contact area between the flat surface portion and the bottom surface of the ring fitting groove. Will be smaller than. For this reason, the adhesive force between the flat surface portion of the seal ring and the bottom surface of the ring fitting groove is larger than the adhesive force between the protruding portion of the seal ring and the end surface of the other side member.
Therefore, when the one-side member and the other-side member that have abutted against each other are separated from each other, the flat surface portion of the seal ring comes into close contact with the bottom surface of the ring fitting groove to stop in the ring fitting groove. It is possible to prevent the seal ring from coming off the ring fitting groove.

Further, in the invention of claim 3, the one side member is a main body of the coating machine, and the other side member is a rear member attached to a rear side of the main body of the coating machine.

According to the above construction, when the rear member that abuts the end face of the coating machine body is removed from the coating machine body, a plurality of ring fitting grooves are formed in the coating machine body or the end surface of the rear member. Since it is possible to prevent the seal ring from coming off, it is possible to improve workability in maintenance and inspection of the coating machine.

[0023]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to FIGS.

In the embodiments, the same components as those of the coating machine illustrated as an application target of the sealing device in the above-mentioned conventional technique are designated by the same reference numerals, and the description thereof will be omitted.

In the figure, 11, 11, ... Depict seal rings applied to this embodiment in place of the above-mentioned seal ring 10 according to the prior art. Each of the seal rings 11 is made of an elastic material such as rubber and has a circular ring shape as a whole. And the ring fitting groove 9 formed on the rear end face 1A of the coating machine main body 1.
Is to be fitted to.

As shown in FIG. 2, the seal ring 11 has a flat surface portion 11A that abuts a bottom surface 9A of the ring fitting groove 9 and an inner peripheral surface 9B of the ring fitting groove 9 over the entire circumference. A ring-shaped inner peripheral surface 11B that faces, a ring-shaped outer peripheral surface 11C that faces the outer peripheral surface 9C of the ring fitting groove 9 over the entire circumference, and a rear portion of the coating machine body 1 when fitted in the ring fitting groove 9 It is composed of a protruding portion 11D protruding from the side end surface 1A. In addition, the annular inner peripheral surface 11B and the annular outer peripheral surface 11C that are continuous with the flat surface portion 11A have a substantially rectangular cross-sectional shape, and the protruding portion 1
1D has a substantially semi-cylindrical or mountain-shaped cross section.

The seal ring 11 is fitted into the ring fitting groove 9 with its annular outer peripheral surface 11C abutting (surface contact) with the outer peripheral surface 9C of the ring fitting groove 9 over the entire circumference. At this time, the projecting portion 11D projecting from the rear end surface 1A of the coating machine main body 1 surrounds the passage opening portion 1B over the entire circumference.

This embodiment has the structure as described above, and when the rear end face 1A of the main body 1 of the coater and the front end face 6A of the rear member 6 are brought into abutment with each other, the ring fitting groove 9 is formed. The seal ring 11 is pressed between the front end surface 6A of the rear member 6 and elastically deformed (see FIG. 3), whereby the passage opening 1B of the main body 1 of the coater and the passage opening 6 of the rear member 6 are formed.
Regarding the point that the fluid can be prevented from leaking from the connecting portion with B, there is no particular difference from the conventional technique.

However, according to this embodiment, the flat surface portion 11A and the annular outer peripheral surface 11C provided on the seal ring 11 are in surface contact with the bottom surface 9A and the outer peripheral surface 9C of the ring fitting groove 9 over the entire circumference. Therefore, the frictional force generated between the seal ring 11 and the ring fitting groove 9 can be increased as compared with the case where the seal ring 10 according to the related art is in line contact.

As a result, even when the rear member 6 is removed from the main body 1 of the coating machine, for example, the bottom surface 9A of the ring fitting groove 9 is formed.
The seal ring 11 can be reliably held in the ring fitting groove 9 due to the large frictional force between the seal ring 11 and the outer peripheral surface 9C. As a result, it is possible to reliably prevent the seal ring 11 from adhering to the front end surface 6A of the rear member 6 and coming off the ring fitting groove 9.

Further, by forming the protruding portion 11D of the seal ring 11 into a semi-cylindrical shape, when the seal ring 11 is elastically deformed between the ring fitting groove 9 and the front end face 6A of the rear member 6, The contact area between the protruding portion 11D of the seal ring 11 and the front end surface 6A of the rear member 6 is such that the flat surface portion 11A of the seal ring 11 and the bottom surface 9A of the ring fitting groove 9 are in contact with each other.
It is smaller than the contact area with.

As a result, the adhesive force between the flat surface portion 11A of the seal ring 11 and the bottom surface 9A of the ring fitting groove 9 becomes
It becomes larger than the adhesive force between the protruding portion 11D of the seal ring 11 and the front end surface 6A of the rear member 6. As a result,
The flat surface portion 11A of the seal ring 11 strongly adheres to the bottom surface 9A of the ring fitting groove 9 so that when the rear member 6 is removed from the main body 1 of the coating machine for maintenance and inspection of the coating machine, a seal is formed. It is possible to more reliably prevent the ring 11 from coming off the ring fitting groove 9.

Thus, since the individual seal rings 11 can be securely held in the ring fitting groove 9, when the rear member 6 is removed from the main body 1 of the coater, the space between the main body 1 and the rear member 6 of the coater is removed. It is possible to prevent the large number of seal rings 11 provided in the above from coming off, and it is possible to remarkably improve the workability during maintenance and inspection of the coating machine.

In the above embodiment, the seal ring 11
The annular outer peripheral surface 11C of the ring fitting groove 9 is brought into contact with the outer peripheral surface 9C of the ring fitting groove 9 over the entire circumference.
Even if the annular inner peripheral surface 11B of the seal ring 11 is brought into contact with the inner peripheral surface 9B of the ring fitting groove 9 over the entire circumference as in the modification shown in FIG. be able to.

Further, in the above embodiment, the seal ring 11
The case where the protruding portion 11D is formed to have a semi-cylindrical cross-sectional shape has been described as an example, but the present invention is not limited to this and may be formed to have a trapezoidal or triangular cross-sectional shape.

Furthermore, in the above embodiment, the case where the ring fitting groove 9 is provided in the rear end face 1A of the coating machine main body 1 has been taken as an example, but the present invention is not limited to this, and for example the rear member 6 is A ring fitting groove may be provided on the front end face 6A.

Further, in the above-mentioned embodiment, the coating machine having the coating machine main body 1 and the rear member 6 is given as an example of the application of the sealing device, but the present invention is not limited to this, and for example, a pump, a valve device and the like. The present invention can be widely applied to various hydraulic / pneumatic devices in which two members provided with a plurality of fluid passages are gas-liquid tightly connected.

[0038]

As described above in detail, according to the first aspect of the invention, the flat surface portion for contacting the seal ring with the bottom surface of the ring fitting groove and the annular inner surface facing the inner peripheral surface of the ring fitting groove. The peripheral surface, the annular outer peripheral surface facing the outer peripheral surface of the ring fitting groove, and the ring fitting groove are fitted together, and are pressed and deformed when the end surface of the one side member and the end surface of the other side member abut against each other. When the seal ring is fitted into the ring fitting groove, the flat surface portion of the seal ring abuts the bottom surface of the ring fitting groove over the entire circumference and the ring shape of the seal ring The inner peripheral surface or the annular outer peripheral surface contacts the inner peripheral surface or the outer peripheral surface of the ring fitting groove over the entire circumference. As a result, the contact area between the seal ring and the ring fitting groove increases, the frictional force generated between the seal ring and the ring fitting groove increases, and the seal ring can be reliably held by the ring fitting groove. It is possible to prevent the ring from adhering to the other member and coming off the ring fitting groove.

According to the second aspect of the present invention, the protruding portion of the seal ring is formed in a semi-cylindrical shape so that when the seal ring is elastically deformed between the ring fitting groove and the end face of the other side member. The contact area between the protruding portion of the seal ring and the end surface of the other member is smaller than the contact area between the flat surface portion of the seal ring and the bottom surface of the ring fitting groove. Therefore, the adhesive force between the flat surface portion of the seal ring and the bottom surface of the ring fitting groove can be made larger than the adhesive force between the protruding portion of the seal ring and the end surface of the other side member. , The flat surface of the seal ring is firmly attached to the bottom of the ring fitting groove,
It is possible to more reliably prevent the seal ring from coming off the ring fitting groove.

Further, according to the invention of claim 3, when the rear member abutting against the end face of the coating machine body is removed from the coating machine body, a large number of parts are provided between the coating machine body and the rear member. Since it is possible to reliably prevent the seal ring from being disengaged from the ring fitting groove, it is possible to greatly improve the workability during maintenance and inspection of the coating machine.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing a coating machine to which a sealing device between end faces of two members according to the present invention is applied.

2 is an enlarged sectional view showing a state in which the seal ring in FIG. 1 is fitted in a ring fitting groove.

FIG. 3 is an enlarged cross-sectional view showing a state where the end surface of the main body of the coating machine and the end surface of the rear member abut against each other.

FIG. 4 is a sectional view similar to FIG. 2, showing a modified example of the seal ring.

FIG. 5 is a partially cutaway external view showing a coating machine to which a sealing device between two member end faces according to a conventional technique is applied.

FIG. 6 is an exploded perspective view of the conventional coating machine shown in FIG.

7 is an enlarged sectional view showing a state in which the seal ring in FIG. 5 is fitted in a ring fitting groove.

FIG. 8 is an enlarged cross-sectional view showing a state in which the end surface of the coating machine main body and the end surface of the rear member are abutted against each other.

FIG. 9 is a cross-sectional view showing a state in which the seal ring is separated from the ring fitting groove.

[Explanation of symbols]

 1 Coating Machine Main Body (One Side Member) 1B Passage Opening 6 Rear Member (Other Side Member) 6B Passage Opening 9 Ring Fitting Groove 9A Bottom (Flat Bottom) 9B Inner Surface (Circular Inner Surface) 9C Outer Surface (Annular outer peripheral surface) 11 Seal ring 11A Flat surface portion 11B Annular inner peripheral surface 11C Annular outer peripheral surface 11D Projecting portion

Claims (3)

[Claims] 1. A one-sided member having an end surface provided with a passage opening, and an other-side member having an end surface abutting the end surface of the one side member provided with a passage opening communicating with the passage opening. A plurality of ring fitting grooves formed on the end surface of the one side member or the other side member so as to surround the passage opening portion, and fitted to the ring fitting grooves, the end surface of the one side member and the other side member. In the sealing device between the two member end faces, which comprises a plurality of seal rings that seal the periphery of the passage opening in a gas-liquid tight manner when the end face of the ring is engaged with the ring fitting groove, The seal ring is formed in an annular shape including an inner peripheral surface and an annular outer peripheral surface, and the seal ring has a flat surface portion that abuts the bottom surface of the ring fitting groove, and an annular inner peripheral surface that faces the inner peripheral surface of the ring fitting groove. And an annular outer peripheral surface facing the outer peripheral surface of the ring fitting groove, and the ring fitting groove. Of the one side member or the other side member, and is integrally formed with a projecting portion that is pressed and deformed when the end surfaces of the one side member or the other side member are abutted against each other. . 2. The sealing device between the two member end faces according to claim 1, wherein the protruding portion of the seal ring is formed in a kamaboko shape. 3. The sealing device between the two member end faces according to claim 1, wherein the one side member is a main body of the coating machine, and the other side member is a rear member attached to a rear side of the main body of the coating machine.