JPH11280976A - Joint - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce flow resistance of a fluid passing through the interior of a joint by installing a seal material interposed between a female valve body slid along the interior of a female joint main body and the female joint main body in a seal groove formed in the inner periphery of the female joint main body. SOLUTION: A seal material 28 (O ring or the like) made of rubber for preventing leakage of a fluid is interposed between a female valve main body 21 and a female joint main body 20. The seal material 28 is installed with a backup ring 30 in a seal groove 29 formed to be opened to the inner periphery of the female joint main body 20 and resiliently pressed to the outer periphery of the female valve body 21. Thus, the wall thickness of the female valve main body 21 is decreased to enlarge the passage area of a fluid passage U in a space up to a bar-like member 22. Accordingly, the flow resistance of a fluid passing through the fluid passage U in the female coupling can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joint for connecting an external device by connecting a male joint and a female joint.

[0002]

2. Description of the Related Art As a conventional joint, utility model registration No. 2
There is one described in 559233. This joint includes a socket having a valve stem on which a slide valve that slides along the inner periphery of the tubular body is seated, and a plug having a valve seated on a valve seat of the plug body. The joint connects the slide valve and the plug body, and after the valve stem and the valve come into contact with each other, acts on the socket and the plug so as to approach each other to connect the internal passage. It is.

[0003]

However, in the conventional joint, packing for maintaining the airtightness between the cylindrical body and the slide valve is mounted on the slide valve. Therefore, in order to mount the packing on the slide valve without increasing the outer diameter of the cylindrical body, it is necessary to increase the thickness of the slide valve to form a seal groove, and the flow path between the valve stem and the valve stem is required. There is a problem that the area becomes small. As described above, the decrease in the flow path area increases the flow resistance of the fluid flowing through the passage. In addition, foreign matter may enter the gap between the cylindrical portion of the socket and the slide valve to damage the packing, and there is also a problem that fluid leaks out of the joint. Further, in the socket, if the spring for urging the slide valve against the plug stem is compressed by the slide valve and the plug stem is fixed to the guide in the cylindrical portion, the assembling work becomes complicated.

[0004] The joint of the present invention aims at reducing the flow resistance of a fluid passing through the inside, preventing the fluid from leaking out, or simplifying the assembling operation. is there.

[0005]

According to a first aspect of the present invention, there is provided a joint (Claim 1) wherein a seal member interposed between a female valve body sliding along the female joint body and the female joint body is formed by a female member. It is mounted in a seal groove formed on the inner periphery of the joint body. Especially,
It is preferable that a seal groove is formed on the inner periphery of the thick portion formed on the outer periphery of the female joint body, and a seal member is attached (claim 2).

According to a second aspect of the present invention, there is provided a joint in which a supporting portion fixed in the female joint body is formed integrally with the female joint body. Further, the rod-shaped member has a protruding portion that protrudes from the support portion to the outside of the female joint body (claim 4).
Further, the rod-shaped member is positioned in the radial direction by fitting with the support hole of the support portion (claim 5).

[0007] A joint according to a third aspect of the present invention (claim 6) is provided with an annular recess that opens in the female valve body, and a through hole is opened at the bottom of the recess. Further, a female valve spring for urging the male valve element against the rod-shaped member is mounted between the female valve spring and the bottom of the recess. Further, the supporting portion is formed integrally with the female joint body (claim 8).

According to a fourth aspect of the invention, there is provided a joint (claim 9) in which a flange is formed at the tip of the female valve body so as to abut against the end face of the male joint body, and only on the end face of the male joint body facing the flange. A connection surface sealing material is attached.

According to a fifth aspect of the present invention, there is provided a male joint holding member comprising a cylindrical portion and a plurality of legs extending radially from the cylindrical portion. A plurality of communication holes are formed with each leg.

In a sixth aspect of the present invention, the female joint body is provided with a dust seal on the male joint body side from the sealing material.

The joint according to the seventh aspect of the present invention reduces the gap between the male joint body and the male valve body of the male joint and between the female joint body and the female valve body of the female joint when the valve is closed. Thus, the shape of each member is determined.

The joint according to the eighth invention (claims 13 to 1)
5) is one in which the male valve element of the male joint is slidable with respect to the holding member.

According to a ninth aspect of the present invention, the diameter of the female member is smaller than that of the male valve element of the male joint.

According to a tenth aspect of the present invention, a female valve for urging the female valve against a rod-shaped member is disposed within the female valve element main body with a free length. After mounting in the female joint main body, the rod-shaped member can be started to be fixed to the support portion with the female valve spring in a free length state.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS First to tenth joints according to the present invention.
The invention will be described.

(1) Joint of the First Invention The joint of the first invention increases the flow passage area in the female joint by considering the arrangement of the sealing material of the female joint connected to the male joint. , With reduced flow resistance. Hereinafter, FIG.
This will be described with reference to FIG.

In FIG. 1 to FIG. 3, a joint 1 is for connecting two fluid pipes (not shown) or the like corresponding to an external device, and comprises a male joint 2 and a female joint 3.

FIG. 1 shows the male joint 2 when separated. The male joint body 4 has a male valve seat 6 projecting radially inward at one end thereof.
And accommodates the male orifice 5 seated on the male orifice seat 6. The eloquent body 5 has a valve head 7 which is seated on an oral seat 6.
, A stepped shaft extending continuously from the male joint body 4 and forming a fluid passage S with the male joint body 4. The holding member 8 is provided on the step formed at the other end of the male joint body 4.
Is fitted, and is prevented from falling off by the snap ring 10. As shown in FIG. 4, the holding member 8
Through hole 12 for slidably holding shaft 11 of male valve element 5
And a number of communication holes 13 communicating with the fluid passage S around the through hole 12. Further, the male valve element 5 is urged to the male valve seat 6 by a male valve spring 9 which is located in the fluid passage S and is stretched between the male member 5 and the holding member 8.

The male joint 2 has a thread portion 14 formed on the outer periphery of the male joint main body 4 and a connecting member (not shown) is screwed through a rubber seal 15 so that the connecting member is connected to a fluid pipe. The fluid passage S is connected. The male joint 2 is configured such that the male valve element 5 is seated on the male valve seat 6 by the male valve spring 9 and the fluid passage S
Is closed, and the orifice 5 is moved against the orifice spring 9 against the orifice seat 7.
The fluid passage S is opened by being separated from the seat. Reference numeral 16 denotes a thick tool engaging portion formed on the outer periphery of the male joint main body 4,
For example, it is formed in a hexagonal shape so that a tool such as a spanner or a wrench can be used.

FIG. 2 shows the female joint 3 when separated. A female valve element 21 is slidably inserted into the inner periphery of the female joint body 20 at a position facing the male valve element 5. Female joint body 20
Has a support portion 23 fixed inside one end thereof. The support portion 23 is formed with a support hole 24 coaxial with the female joint body 20 and a number of through holes 25 communicating with the inside of the female joint body 20 around the support hole 24. The rod-shaped member 22 disposed at a position facing the male valve element 5 is a stepped shaft-shaped body fixed to the support portion 23 in the support hole 24, and includes the rod-shaped member 22, the female joint body 20, and the female valve. A fluid passage U is formed with the body 21. At the tip of the rod-shaped member 22,
A female valve seat 27 on which the female valve element 21 is seated from the fluid passage U side is formed. A female valve spring 26 is stretched between the female valve 21 and the support portion 23 to press the female valve 21 toward the male valve seat 27.

A rubber seal member 28 (such as an O-ring) for preventing leakage of fluid is interposed between the female valve element 21 and the female joint body 20. The seal member 28 is formed of the female joint body 2
0 is mounted together with a backup ring 30 in a seal groove 29 formed in the inner periphery of the valve body 0 and is elastically contacted with the outer periphery of the female valve element 21. When the seal member 28 is provided not on the female valve body 21 side but on the female joint body 20 side, the thickness (radial direction) of the female valve body 21 is reduced so that the flow of the fluid passage U between the rod-shaped members 22 is reduced. The road area can be increased. In particular, seal groove 2
9 is formed on the inner peripheral surface of the thick portion 31 on which a tool such as a wrench or a wrench is applied around the outer periphery of the female joint body 20.
When the seal member 28 is attached to the female joint 9, the seal member 28 can be sufficiently attached using the existing thick portion 31 formed on the outer periphery of the female joint body 20, and the outer diameter of the female joint body 20 is enlarged. Can be reduced. The thick portion 31 is formed in a hexagonal shape so that a tool such as a spanner or a wrench can be used.

The female joint 3 has a threaded portion 32 formed on the outer periphery of the female joint main body 20 and a connecting member (not shown) is screwed through a rubber seal 33 so that the connecting member is connected to a fluid pipe. Connect the fluid passage U. Female joint 3
The female valve body 21 is seated on the female valve seat 27 by the female valve spring 26 to close the fluid passage U, and the female valve body 21 is separated from the female valve seat 27 against the female valve spring 26. To open the fluid passage U.

As shown in FIG. 3, the male joint 2 and the female joint 3 are brought into surface contact with the male joint body 4 and the female valve element 21 with a rubber seal 34 interposed therebetween. Are brought into surface contact with each other and then connected by applying a force to approach each other. That is, since the male joint body 4 separates the female valve element 21 from the female valve seat 27 against the female valve spring 26 and the rod-shaped member 22 separates the male valve element 5 from the male valve seat 6, A few fluid passages S and U communicate with each other.

With this configuration, the female joint body 21 and the female valve 21
Is inserted into the seal groove 29 formed on the inner periphery of the female joint body 21, so that the thickness (radial direction) of the female valve body 21 is reduced and the rod-shaped member 22 is formed. And the flow path area of the fluid passage U between them can be increased. Therefore, the flow resistance of the fluid flowing through the fluid passage U in the female joint 2 can be reduced.

When the seal groove 29 is formed on the inner periphery of the thick portion 31 formed on the outer periphery of the female joint main body 31 and the seal material 28 is attached to the seal groove 29, the thickness of the female joint main body 21 is reduced. Thickness (in the radial direction) can be reduced, which can contribute to downsizing. In the female joint 3, the configuration in which the female valve element 21 slides along the inner periphery of the female joint body 20 has been described. However, the present invention is not limited to this. The valve body 21 may slide.
In this case, the seal groove 29 is formed on the inner periphery of the female valve element 21, and a seal member 28 is mounted in the seal groove 29.

(2) Joint of the Second Invention The joint of the second invention comprises the male joint 2 and the female joint 3 shown in FIGS. The support part 23 is integrally formed, and the rod-shaped member 22 is
0, the flow path area is increased,
The flow resistance is reduced. Hereinafter, description will be made with reference to FIGS.

In FIG. 2, the support portion 23 of the female joint 2
A support hole 24 is formed integrally with the female joint body 20 and is coaxial with the female valve element 21. In the support hole 24, a fitting portion 35 and a screw portion 36 are formed continuously from the fluid passage U side. Around the support hole 24, a number of through holes 25 communicating with the fluid passage U are formed. The rod-shaped member 22 includes
A very small gap (a gap of 0 to 0.0
3 mm), and a projection shaft 37 (projection) that is screwed into the screw portion 36 and protrudes outside the female joint body 20.
Are integrally formed.

With this configuration, the joint 1 separates the joints 2 and 3 from the state in which the fluid passages S and U of the joints 2 and 3 are communicated (see FIG. 3). Orator seat 6
, The fluid passage S is closed, and the female valve element 21 is seated on the female valve member 27 by the female valve spring 26 to close the fluid passage U. In this state, the fluid pressure in the female joint 3 acts in a direction to close the female valve element 21 and the rod-shaped member 22, and the support portion 23 and the female joint main body 20 are connected via the rod-shaped member 22. Although the stress is concentrated on the mating portion, the rigidity is increased by integrally forming the support portion 23 and the female joint main body 20, so that the engaging portion does not have to be thickened radially outward. The flow passage area of the fluid passage U is increased to reduce the flow resistance. Further, when the support portion 23 is formed integrally with the female joint body 20, the number of components is reduced, and the assembling time of the female joint 2 can be reduced.

The rod-like member 22 is formed by engaging a tool or the like with a projecting shaft 37 projecting from the female joint body 20 to the outside.
By rotating, it can be fixedly supported on the screw portion 36 of the support portion 23. Since the projecting shaft 37 is projected from the female joint main body 20 to a minimum, the flow path area can be increased without obstructing the flow of the fluid from the fluid pipe toward each through hole 25.
Further, since the rod-shaped member 22 can be assembled and fixed to the support portion 23 via the projecting shaft 37 projecting from the female joint main body 20, the assembly work can be simplified.

In mounting the rod-shaped member 22 to the support portion 23, the projecting shaft 37 may be screwed to the screw portion 36 of the support portion 23 and loosened with an adhesive (Loctite). This eliminates the necessity of screwing the nut to the projecting shaft 37 projecting outside the female joint main body 22 to prevent the rod-shaped member 22 from loosening, and the nuts 25 need not be screwed.
The flow resistance can be reduced without obstructing the flow of the fluid toward.

Further, by positioning the rod-shaped member 22 in the radial direction at the fitting portion 35 of the support hole 24, the rod-shaped member 22 can be positioned coaxially with the female valve element 21 without adding any components. Thus, the female valve element 21 is seated on the female valve seat 27 of the rod-shaped member 22 without any gap, and it is possible to prevent liquid leakage when the fluid passage S is closed. Since the rod-shaped member 22 can be fixed to the support portion 23 so as to be located concentrically with the female valve element 21, the eccentricity due to screwing to the screw portion 36 is corrected by the fitting portion 35, so that the rod-shaped member 22 is directly connected to the support portion 23. Can be fixed. Therefore, a nut or the like for fixing the rod-shaped member 22 to the support portion 23 can be omitted, and
There is no blockage of the fluid flow by the nut, and the flow over resistance can be reduced.

(3) Joint of the Third Invention The joint of the third invention comprises the male joint 2 and the female joint 3 shown in FIGS. 1 to 3 and is formed integrally with the female joint main body 20. By forming the recess 40 in the support portion 23, the through hole 35 is formed.
The flow path resistance of the fluid is reduced by shortening the axial length of a portion having a small flow path area in which is formed. Less than,
This will be described with reference to FIGS.

In FIG. 2, the support portion 23 of the female joint 2 is formed integrally with the female joint body 20, and opens around the support hole 24 toward the fluid passage U to form a coaxial annular recess 40 with the female joint body 20. Are formed. Each through hole 25 of the support portion 23 is
The bottom of the recess 40 communicates with the fluid passage U. The female valve spring 26 for urging the female valve element 21 includes the recess 40 and the female valve element 2.
It is stretched between 1.

With this configuration, the fluid passage U of the female joint body 20
When each of the through-holes 25 communicating with the male joint 2 and the female joint 3 in FIG. The flow resistance of the fluid flowing through each through hole 25 can be reduced.

A female valve spring 26 for urging the female valve element 21
Is mounted between the bottom of the recess 40 and the female valve element 21, the recess 40 becomes a part of a mounting space for the female valve spring 26,
The axial length of the female joint 2 can be reduced by the depth of the recess 40.

Further, if the support portion 23 is formed integrally with the female joint body 20, the connection between the female joint body 20 and the support portion 23 can be firmly formed. Therefore, the length of the female joint 3 in the axial direction can be further reduced.

(4) Joint of the Fourth Invention The joint of the fourth invention comprises the male joint 2 and the female joint 3 shown in FIGS. By forming the flange, the flow passage area is increased and the flow resistance of the fluid is reduced. Hereinafter, description will be made with reference to FIG.

In FIG. 5, the female valve body 21 is integrally formed with a flange 45 extending radially outward from the distal end on the rod-shaped member 22 side, and the end face of the male joint body 4 is brought into surface contact with the flange 45. . A rubber connection face seal 46 (such as an O-ring) is provided on the end face of the male joint body 4 facing the flange 45. The connection surface seal 46 is mounted in a seal groove 47 opened on the end surface of the male joint main body 4 that comes into contact with the flange 45.

With this configuration, the contact surface seal 46 interposed on the contact surface between the male joint body 4 and the female valve element 21 is
And the seal groove 47 is not formed in the female valve element 21, so that the inner diameter of the female valve element 21 can be increased and the flow path area can be increased without increasing the outer diameter of the female joint body 20. Therefore, even if the male joint 2 and the female joint 3 shown in FIG. 5 are connected to allow the fluid to pass through, the flow passage area in the female valve element 21 is increased, so that the flow resistance of the fluid can be reduced.

(5) Joint of the Fifth Invention The joint of the fifth invention comprises the male joint 2 and the female joint 3 shown in FIGS. 1 to 3, and the shape of the holding member 8 of the male joint 2 Is changed, the flow passage area is increased, and the flow resistance of the fluid is reduced. Hereinafter, description will be made with reference to FIGS.

Holding member 8 arranged in male joint body 4
As shown in FIG. 6, a cylindrical portion 50 having a through hole 12 through which the shaft portion 11 of the male valve element 5 slides, and a radial shape having a predetermined angle (120 degrees) around the cylindrical portion 50 are provided. And three extending legs 51. And the holding member 8
As shown in FIG. 1, each leg 51 is arranged on the other end side of the male joint main body 4 while abutting each leg 51 with a step in the male joint main body 4,
It is retained by the snap ring 10. Holding member 8
Are arranged in the male joint main body 4, three communication holes 52 are formed by the inner periphery of the male joint main body 4 and each leg 51.
reference). The number of the legs 51 is not limited to three.

In this configuration, only the three leg portions 51 block the fluid passage U of the male joint body 4 and connect the male joint 2 and the female joint 3 shown in FIG. Hole 5
2, the flow path area can be increased. Therefore, the flow resistance of the fluid passing through the holding member 8 can be reduced. Also,
This configuration may be applied to the support portion 23.

(6) Joint of the Sixth Invention The joint of the sixth invention is a male joint 2 and a female joint 3 shown in FIGS.
By providing a dust seal on the female joint body 20 of the female joint 3, the amount of fluid leaking to the outside is reduced. Hereinafter, description will be made with reference to FIGS.

1 and 3, the dust seal 55 is located between the female joint body 20 and the female valve element 21 at a position closer to the male joint body 4 than the seal member 28. The dust seal 55 is formed in the seal groove 5 formed on the inner circumference of the female joint body 21.
6 and has a lip portion 57 that is elastically contacted with the outer periphery of the female valve element 21.

With this configuration, the dust seal 55 prevents foreign matters and the like from entering the fluid passage U of the female joint main body 20 from the seal member 28 side, and the seal member 28 can be protected. Therefore, leakage of the fluid to the outside can be prevented. Further, since the seal grooves 29 and 56 for mounting the seal member 28 and the dust seal 55 are integrally formed on the inner periphery of the female joint body 20, processing is easier than providing the seal member 28 and the dust seal 55 on separate members. Becomes

(7) Joint of the Seventh Invention The joint of the seventh invention is a male joint 2 and a female joint 3 shown in FIGS.
In consideration of the shapes of the male joint body 4 and the male valve body 5 of the male joint 2 and the female valve body 20 and the rod-shaped member 21 of the female joint 3, when the joints 2 and 3 are separated from each other, The amount of fluid leaking to the outside is reduced. Hereinafter, description will be made with reference to FIG.

The joint 1 shown in FIG. 7 shows a state where the male joint 2 and the female joint 3 are in contact with each other. In FIG.
A tapered female valve seat 27 whose diameter increases from the shaft portion 60 fixed to the support portion 23 toward the male valve body 5, and a female cylinder continuously projecting from the female valve seat 27 toward the male valve body 5 A portion 62 is formed. On the inner periphery of the female valve element 21, a tapered female valve element portion 63 that is seated on the female valve seat 27 from inside the fluid passage U is formed, and from the female valve element portion 63, the female cylindrical portion 62 of the rod-shaped member 22 is formed. It has a cylindrical shape along the outer circumference. When the female valve element 21 is seated on the female valve seat 61 of the rod-shaped member 22, the contact surfaces 64, 65 of the female valve element 21 and the rod-shaped member 22 on the male joint 2 side are in the axial direction of the rod-shaped member 22. And in a vertical plane.

On the other hand, the valve head 7 of the male orifice 5 has a shaft 11
And a tapered male valve body 66 whose diameter decreases toward the rod-shaped member 22.
A male column 67 projecting to the side is formed. On the inner periphery of the male joint body 4, a tapered male valve seat 68 on which the male valve element 5 is seated from the female joint 3 side is formed.
8 to a cylindrical shape along the outer periphery of the male cylindrical portion 66 of the male valve element 5. When the male valve body 5 is seated on the male joint body 4, the female joint 3 between the male valve body 5 and the male joint body 4 is removed.
The respective contact surfaces 69, 70 on the side coincide with a plane perpendicular to the axial direction of the male valve element 5.

With this configuration, as shown in FIG.
The fluid passage S is closed by seating the male valve element 5 on the male valve seat 68 of the male joint body 4, and the fluid passage U is closed by seating the female valve element 21 of the female joint 3 on the female valve seat 27 of the rod-shaped member 22. When,
The space in which the fluid accumulates is limited to a small space between the male cylinder 67 of the male valve element 5 and the cylindrical shape of the male joint body 4 and the female cylindrical portion 62 of the rod 23 between the cylindrical shape of the female valve element 21. .
Therefore, when the male valve element 2 is separated from the female valve element 3, the amount of fluid leaking to the outside can be reduced. Further, by forming the female columnar portion 62 in the rod-shaped member 22, the diameter of the rod-shaped member 22 can be made smaller than that in which the diameter is expanded in a tapered shape to the tip, and the female joint 3 itself can be downsized. Further, the male joint 2 can also be made smaller than the one in which the tapered male joint body 4 is formed based on the tip of the rod-shaped member 22.

(8) Joint of the Eighth Invention The joint of the eighth invention is a male joint 2 and a female joint 3 shown in FIGS.
The amount of fluid leaking to the outside is reduced by making the male valve element 5 swingable with respect to the holding member 8. Hereinafter, description will be made with reference to FIGS.

In FIGS. 1 and 3, the holding member 8 of the male joint 2 is arranged with a small gap with respect to the inner periphery of the male joint main body 4. With this configuration, when the male joint 2 and the female joint 3 are connected as shown in FIG.
Even if there is a misalignment between them, the male valve 5 is swung through the holding member 8 so as to absorb the misalignment, and the male valve 5 and the rod-shaped member 22 are reliably brought into surface contact. Therefore, fluid does not accumulate in the contact surface between the male valve element 5 and the rod-shaped member 22,
When the male joint 2 and the female joint 3 are separated from each other, fluid can be prevented from leaking to the outside. Even if the male valve element 5 is supported in the through hole 12 of the holding member 8 with a small gap, the male valve element 5 can be swung.

(9) Joint of the Ninth Invention The joint of the ninth invention comprises the male joint 2 and the female joint 3 shown in FIGS. 1 to 3, and is shown in FIGS. As shown in FIG. 8, by making the contact surface 65 of the rod-shaped member 22 smaller in diameter than the contact surface 70 of the male valve element 5, the allowable range of misalignment is widened and the assembly is facilitated. For example, the rod-shaped member 2
The diameter of the contact surface 65 of the second member is smaller than the contact surface 70 of the male valve element 5 by a radius of about 1.5 mm.

With this configuration, when assembling the joints 2 and 3,
Even if misalignment occurs between the male valve element 5 and the rod member 22, the contact surface 65 of the rod member 22 absorbs the misalignment by the smaller diameter than the male valve element 5, and the rod member 22 and the male valve element 5 are offset. Can be abutted. Therefore, when the joints 2 and 3 are attached to industrial equipment, it can be easily performed without centering the rod-shaped member 22 and the male valve element 5 with high accuracy. In addition, the rod-shaped member 22 and the orifice 5
This eliminates the need for a centering mechanism that aligns the center of the joint, and allows the joint 1 to be assembled to industrial equipment at low cost.

(10) Joint of the Tenth Invention A joint of the tenth invention comprises the male joint 2 and the female joint 3 shown in FIGS.
1, 2, and 26 are considered.

In FIG. 2, the female joint 3 is assembled by arranging the female valve spring 3 so as to abut on the support portion 23 and then slidably mounting the female valve element 21 in the female joint body 4. Subsequently, with the free length in which the female valve spring 26 is not compressed, the rod-shaped member 22 is inserted into the female valve body 21 and the female joint body 20 and screwed into the threaded portion in the support hole 24. Then, the rod-shaped member 22 is fitted into and fixed to the support hole 24 of the support portion 23 while compressing the female valve spring 26.
To complete the assembly.

As described above, the rod-shaped member 22 is connected to the female joint main body 2.
When the female valve spring 26 is mounted on the rod-shaped member 22 and the supporting portion 23 without compressing the female valve spring 26, the female valve spring 26 has a free length.
Can be started to be screwed together, so that the assembling work is simplified. Also, a nut is screwed into the screw portion of the protruding shaft 37,
Similarly, in the case where the rod-shaped member 22 is configured to be fixed, the assembling operation can be simplified if the female valve spring has a free length when the screw portion and the nut start screwing.

In the joints according to the first to tenth aspects of the present invention, a gap is formed between the female valve element 21 and the female joint body 20 so as to allow the female valve element 21 to swing. When the axial center misalignment with the female joint 3 occurs, the female valve element 21 may be swung in accordance with the male joint 2 so that the contact surfaces are parallel. Thus, the airtightness of the abutting seals 34 and 46 is not lost. Further, the female joint body 20
By reducing the axial length of the surface that slides with the female valve element 21, the swing range of the female valve element 21 can be widened.

In the joints according to the first to tenth aspects of the present invention, when the male joint 2 and the female joint 3 are connected, the fluid pressure acts in the direction of pressing the female valve body 21 toward the male joint main body 4 side. 3
The airtightness by 4,46 is increased.

Further, in the joints of the first to tenth aspects of the present invention, since the male valve spring 9 is directly in contact with the valve head 7 of the male valve element 5, no spring receiving member is required. In addition, eloquent body 5
By providing a slight gap between the shaft portion 11 and the male valve spring 26, the sliding resistance of the male valve element 5 can be reduced while guiding the male valve spring 9.

[0060]

According to the joint of the first invention, the seal member interposed between the female valve element sliding along the female joint body and the female joint body is formed on the inner periphery of the female joint body. It is installed in the seal groove. This eliminates the necessity of forming a seal groove in the female valve element, so that the thickness of the female valve element can be reduced and the flow area of the fluid passage between the rod-shaped members can be increased. Resistance can be reduced. Further, by forming a seal groove on the inner periphery of the thick portion formed on the outer periphery of the female joint main body, it is possible to reduce the enlargement of the outer diameter of the female joint main body and achieve downsizing of the female joint.

In a joint according to a second aspect of the present invention, the support portion fixed in the female joint body is formed integrally with the female joint body. Accordingly, when the female joint is separated, the fluid pressure in the female joint main body acts to move the female valve element and the rod-shaped member in the valve closing direction, and a force is applied to a portion where the support portion engages with the female joint main body. However, since the rigidity is enhanced by integrally forming the support portion with the female joint body, the portion where the support portion engages with the female joint body is not thickened in the radial direction, and the fluid passage is formed. The flow passage area can be increased to reduce the flow resistance. In addition, when the bar-shaped member is formed with a protrusion projecting from the support to the outside of the female joint body, the rod-shaped member can be easily fixed to the support via the protrusion, and the amount of protrusion from the female joint body can be minimized. By doing so, the flow path area can be increased without obstructing the fluid flowing through each through hole of the support portion. Further, when the rod-shaped member is positioned in the radial direction by fitting the support portion into the support hole of the support portion, the female valve element and the rod-shaped member can be coaxially arranged without adding components. In this case, a gap between the rod-shaped member and the female valve element can be eliminated, and leakage of fluid to the outside can be prevented.

A joint according to a third aspect of the present invention is a joint in which an annular recess is provided in the support portion, and a through hole is opened at the bottom of the recess. Thus, the axial length of the through hole of the support portion can be reduced, so that the flow resistance of the fluid flowing through the through hole can be reduced. Also, when a female valve spring that urges the female valve element against the rod-shaped member is mounted in the recess, the concave portion can be a part of the mounting space for the female valve spring, and the axial length of the female joint can be shortened. be able to. Further, when the support portion is formed integrally with the female joint body, the recess can be formed to a depth that does not affect the strength of the support portion, and the female joint can be further shortened in the axial direction.

In the joint according to a fourth aspect of the present invention, a flange is formed at the end of the female valve body so as to abut against the end face of the male joint body, and a connection surface sealing material is provided only on the end face of the male joint body facing the flange. It is the one that was attached. This eliminates the need to form a seal groove in the female valve element, so that the inner diameter of the female valve element can be increased and the flow path area can be increased without increasing the outer diameter of the female joint body. The resistance can be reduced.

In the joint according to the fifth aspect of the invention, the holding member of the male joint is constituted by a cylindrical portion and a plurality of legs extending radially from the cylindrical portion. A plurality of communication holes are formed. Thereby, since the flow passage area of each communication hole through which the fluid passes can be increased, the flow resistance of the fluid can be reduced.

A joint according to a sixth aspect of the present invention has a female joint body provided with a dust seal on the male joint body side from the sealing material. This prevents foreign matter from entering the seal material side by the die seal and protects the seal material, so that leakage of fluid to the outside by the seal material can be prevented.

In the joint according to the seventh aspect of the present invention, when the valve is opened, each member is configured to reduce a gap between the male joint body and the male valve body of the male joint and the female joint body and the female valve body of the female joint body. Is determined. With this, when closing the male joint and the female joint, the gap between the male joint body and the male valve body and the gap between the female joint body and the female valve body can be minimized, so when each joint is separated Only the fluid corresponding to the gap leaks to the outside.

In a joint according to an eighth aspect of the present invention, the male valve body of the male joint is swingable with respect to the holding member. Thus, the misalignment between the male valve element and the rod-shaped member can be absorbed by the swinging of the male valve element, so that the accumulation of fluid between the male valve element and the rod-shaped member can be prevented. Therefore, it is possible to prevent the fluid from leaking to the outside.

In a ninth aspect of the present invention, the diameter of the rod member of the female joint is smaller than that of the male valve element of the male joint. Thereby, when connecting the male joint and the female joint, without centering the male valve body and the rod-shaped member with high accuracy, the misalignment is absorbed by the difference in diameter between the male valve body and the rod-shaped member. Can be easily connected.

In the joint according to the tenth aspect of the present invention, a female valve spring for urging the female valve body against the rod-shaped member is disposed at a free length in the female joint body, and in this state, the female valve body is mounted in the female joint body. After doing
This makes it possible to start fixing the rod-shaped member to the support. Thereby, when assembling the rod-shaped member to the female joint body, the rod-shaped member and the supporting portion can be fixed without the female valve spring having a free length and without compressing the female valve spring, so that the assembling work is simplified.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a male joint constituting a joint.

FIG. 2 is a sectional view showing a female joint constituting the joint.

FIG. 3 is a sectional view showing a joint in which a male joint and a female joint are connected.

FIG. 4 is an enlarged view showing a holding member of the male joint.

FIG. 5 is a cross-sectional view showing a modified example of a joint in which a male joint and a female joint are connected.

FIG. 6 is an enlarged view showing a modification of the holding member of the male joint.

FIG. 7 is an enlarged view showing a male joint main body and a male valve body of a male joint, and a female valve body and a rod-shaped member of a female joint.

FIG. 8 is an enlarged view showing a relationship between a male valve body of a male joint and a rod-shaped member of a female joint.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Joint 2 Male joint 3 Female joint 4 Male joint main body 5 Male valve 6 Male valve seat 8 Holding member 9 Male valve spring 12 Through hole 13 Communication hole 20 Female joint main body 21 Female valve 23 Support part 24 Support hole 25 Through hole 26 Female valve Spring 27 Female valve seat 28 Seal material 29 Seal groove 31 Thick part

 ──────────────────────────────────────────────────の Continuing on the front page (72) Inventor Kazuki Kondo 1-16-117 Fukuyoshidai, Nishi-ku, Kobe-shi, Hyogo Nabco Seishin Plant Co., Ltd.

Claims (17)

[Claims] 1. A female member having a cylindrical female joint body, a cylindrical female valve element slid along the female joint body, and a female valve seat on which a distal end of the female valve element is seated. A rod-shaped member fixed to the female joint body through a female valve spring for urging the female valve body toward the female valve seat, and a seal member interposed between the female joint body and the male valve body And a male joint having a cylindrical male joint body disposed so as to be able to abut on the tip of the female valve element, wherein the male joint body resists the female valve spring with the female joint. By detaching the valve body from the female valve seat, at a joint connecting the passages in the male joint body and the female joint body, the inside of the female joint body located radially outside the female valve body A joint, wherein a seal groove is formed in a periphery, and the seal material is mounted in the seal groove. 2. The female joint main body according to claim 1, wherein a thick portion with which a tool is engaged is formed, and the seal groove is formed on an inner periphery of the thick portion. Fittings. 3. A female joint having a cylindrical female joint body, a cylindrical female valve element slid along the female joint body, and a female valve seat on which a distal end of the female valve element is seated. A rod-shaped member fixed to the female joint body through a female valve spring for urging the female valve body toward the female valve seat, and a seal member interposed between the female joint body and the male valve body And a male joint having a cylindrical male joint body disposed so as to be able to abut on the tip of the female valve element, wherein the male joint body resists the female valve spring with the female joint. By detaching a valve body from the female valve seat, in a joint that connects a passage in the male joint body and a passage in the female joint body, the support portion is integrally formed with the female joint body,
A joint, wherein a threaded portion for screwing with an external device is formed on an outer periphery of the female joint body. 4. The joint according to claim 3, wherein the rod-shaped member has a protruding portion that penetrates the support portion and protrudes outside the female joint body. 5. The support portion has a support hole formed therethrough coaxially with the female valve body, and the rod-shaped member is fitted into the support hole, and is fitted in the support hole in a radial direction. The joint according to claim 3, wherein the joint is positioned. 6. A cylindrical female joint body, a support portion fixed in the female joint body and having a through-hole, a cylindrical female valve body slid along the female joint body, and A rod-shaped member having a female valve seat on which the tip of the valve element is seated and fixed to the female joint body via the support portion, and a female valve spring for urging the female valve element toward the female valve seat; A female joint having a seal member interposed between the female joint body and the male valve body; and a male joint having a cylindrical male joint body disposed so as to be able to abut on the tip of the female valve body. By disengaging the female valve body from the female valve seat against the female valve spring in the male joint body, a joint connecting the passage in the male joint body and the female joint body, The support portion is formed with a recess coaxially with the female joint body, the recess being open in the female valve body. A joint characterized in that said through hole is opened at the bottom of a place. 7. The female valve body is slidably disposed on the inner periphery of the female joint body, and the female valve spring is stretched between the bottom of the recess and the female valve body. The joint according to claim 6, wherein 8. The female joint body according to claim 6, wherein the support portion is formed integrally with the female joint body.
The joint described in the above. 9. A female joint body having a tubular female joint body, a cylindrical female valve body slid along the female joint body, and a female valve seat on which a distal end of the female valve body is seated. A rod-shaped member fixed to the female joint body through a female valve spring for urging the female valve body toward the female valve seat, and a seal member interposed between the female joint body and the male valve body And a male joint having a cylindrical male joint body disposed so as to be able to abut on the tip of the female valve element, wherein the male joint body resists the female valve spring with the female joint. In a joint for connecting a passage in the male joint body and a passage in the female joint body by detaching the valve body from the female valve seat, the distal end of the female valve body has a surface facing the end face of the male joint body. A flange to be contacted is formed, and a connection surface sealing material is provided only on the end face of the male joint body facing the flange. A joint characterized by being attached. 10. A female joint body having a cylindrical female joint body, a cylindrical female valve body slid along the female joint body, and a female valve seat on which a distal end of the female valve body is seated. A rod-shaped member fixed to the female joint body through a female valve spring for urging the female valve body toward the female valve seat, and a seal member interposed between the female joint body and the male valve body And a cylindrical male joint body disposed so as to be in contact with the distal end of the female valve element, and formed at an end of the female joint body of the male joint body disposed within the male joint body. A male valve element seated on the male valve seat, a holding member arranged in the male joint body to slidably hold the male valve element, and a male valve spring for urging the male valve element toward the male valve seat. A male joint having the female joint body and the male joint by relatively moving the female joint and the male joint. The distal end of the joint body, the male valve element and the distal end of the female valve element are brought into contact with each other, the female valve element is separated from the female valve seat against the female valve spring, and the male valve spring is opposed to the female valve element. The male valve body is separated from the male valve seat to connect a passage in the female joint body and the male joint body, wherein the holding member slidably supports the male valve body. And a plurality of legs extending radially from the outer periphery of the cylindrical portion. The legs are stored in contact with the inner periphery of the male joint body, and the inner periphery of the male joint body is A joint, wherein a plurality of communication holes are formed between the joint and the holding member. 11. A female member having a cylindrical female joint body, a cylindrical female valve element slid along the female joint body, and a female valve seat on which a distal end of the female valve element is seated. A rod-shaped member fixed to the female joint body through a female valve spring for urging the female valve body toward the female valve seat, and a seal member interposed between the female joint body and the male valve body And a male joint having a cylindrical male joint body disposed so as to be able to abut on the tip of the female valve element, wherein the male joint body resists the female valve spring with the female joint. In a joint for connecting a passage in the male joint body and a passage in the female joint body by detaching a valve body from the female valve seat, the male joint body is closer to the male joint body than the sealant. And a dust seal resiliently contacting the female valve element. 12. A female member having a cylindrical female joint body, a cylindrical female valve element slid along the female joint body, and a female valve seat on which a distal end of the female valve element is seated. A rod-shaped member fixed to the female joint body through a female valve spring for urging the female valve body toward the female valve seat, and a seal member interposed between the female joint body and the male valve body And a cylindrical male joint body disposed so as to be able to contact the tip of the female valve element, and a male joint body side end of the female joint body disposed within the male joint body. A male valve seated on the formed male valve seat, a holding member arranged in the male joint body to slidably hold the male valve, and a male valve spring for urging the male valve toward the male valve seat. A male joint having the female joint body and the male joint, by relatively moving the female joint and the male joint. The distal end of the male joint body, the distal end of the male valve element and the distal end of the female valve element are brought into contact with each other, the female valve element is separated from the female valve seat against the female valve spring, and the male valve spring is In a joint for connecting the passage in the female joint body and the passage in the male joint body by detaching the male valve body from the male valve seat in opposition, the rod-shaped member is a shaft tip fixed to the support member. And a tapered female valve seat that expands in diameter toward the male valve body, and a female cylinder portion extending from the female valve seat to the male valve body side are formed, and the female valve body is seated on the female valve seat. It is formed in a shape along the female column portion continuously from the tapered female valve body portion, and when the female valve body is seated on the female valve seat, the rod-shaped member and the female valve body Along with the front end surface of the male joint main body side coincides with a plane intersecting the axis of the rod-shaped member, The male and female valve element has a tapered male valve element part whose diameter is reduced toward the female valve element from the tip of the shaft supported by the holding member, and a male cylindrical part that continuously extends from the male valve element to the female valve element. The male joint body is formed in a shape along the male cylinder portion continuously from the tapered male valve seat on which the male valve body is seated, and the male valve body is seated on the male valve seat. A joint characterized in that the male valve body and the male valve body have end faces on the female joint main body side aligned with a plane intersecting the axis of the male valve body. 13. A female joint body having a cylindrical shape, a cylindrical female valve body slid along the female joint body, and a female valve seat on which a distal end of the female valve body is seated. A rod-shaped member fixed to the female joint body through a female valve spring for urging the female valve body toward the female valve seat, and a seal member interposed between the female joint body and the male valve body And a cylindrical male joint body disposed so as to be able to contact the tip of the female valve element, and a male joint body side end of the female joint body disposed within the male joint body. A male valve seated on the formed male valve seat, a holding member arranged in the male joint body to slidably hold the male valve, and a male valve spring for urging the male valve toward the male valve seat. A male joint having the female joint body and the male joint, by relatively moving the female joint and the male joint. The distal end of the male joint body, the distal end of the male valve element and the distal end of the female valve element are brought into contact with each other, the female valve element is separated from the female valve seat against the female valve spring, and the male valve spring is In a joint that separates the male valve body from the male valve seat and connects a passage in the female joint body and a passage in the male joint body, the contact surfaces of the male valve member and the female valve member are respectively The male valve element is slidably supported on the holding member so that the male valve element and the female valve element are in contact with each other according to the contact state of the male valve element and the female valve element. Fittings. 14. The joint according to claim 13, wherein a gap is provided between the male valve element and the holding member to make the male valve element swingable. 15. The joint according to claim 13, wherein a gap is provided between the male valve element and the holding member to make the male valve element swingable. 16. A female joint body having a cylindrical female joint body, a cylindrical female valve body slid along the female joint body, and a female valve seat on which a distal end of the female valve body is seated. A rod-shaped member fixed to the female joint body through a female valve spring for urging the female valve body toward the female valve seat, and a seal member interposed between the female joint body and the male valve body And a cylindrical male joint body disposed so as to be able to contact the tip of the female valve element, and a male joint body side end of the female joint body disposed within the male joint body. A male valve seated on the formed male valve seat, a holding member arranged in the male joint body to slidably hold the male valve, and a male valve spring for urging the male valve toward the male valve seat. A male joint having the female joint body and the male joint, by relatively moving the female joint and the male joint. The distal end of the male joint body, the distal end of the male valve element and the distal end of the female valve element are brought into contact with each other, the female valve element is separated from the female valve seat against the female valve spring, and the male valve spring is The male valve body is separated from the male valve seat in opposition, and at a joint connecting the passage in the female joint body and the male joint body, the male valve body and the female valve body are brought into surface contact with each other. A joint characterized in that the contact surface of the female valve element is smaller in diameter than the male valve element. 17. A female joint body having a cylindrical female joint body, a cylindrical female valve body that slides along the female joint body, and a female valve seat on which a distal end of the female valve body is seated. A rod-shaped member fixed to the female joint body through a female valve spring for urging the female valve body toward the female valve seat, and a seal member interposed between the female joint body and the male valve body And a male joint having a cylindrical male joint body disposed so as to be able to abut on the tip of the female valve element, wherein the male joint body resists the female valve spring with the female joint. By detaching a valve body from the female valve seat, in a joint connecting a passage in the male joint body and a passage in the female joint body, when fixing the rod-shaped member to the support portion, the female valve spring Starts fixing the rod-shaped member in a free length state,
A joint, wherein the female valve spring is compressed to complete the fixing of the rod-shaped member.