JP2001304469A - Quick-disconnect pipe fitting structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pipe fitting structure for joining two flow passage constituent members in a single operation without impairing at all the sealing performance between the two passage constituent members and also provide a piping device. SOLUTION: The quick disconnect pipe fitting structure includes a male member 10 constituting one of the flow passage constituent members and a female member 12 installed capable of being mounted and removed on/from the other passage constituent member 38, wherein a ring-shaped seal member 24 is provided on the major diametric portion 18 of the inserting part 14 of the male member 10 while an engaging ring 28 capable of elastic deformation having an outside diameter smaller than the inside diameter of the femal member 12 and a circumferential groove 26 to accommodate the ring 28 being deformed elastically are provided on/in the minor diametric portion 20 of the inserting part 14, and an engaging surface 54 to engage the ring 28 is provided on an inner surface part 32 of the female member 12 where the inserting part 14 of the male member 10 is inserted, and a gap 62 extending toward the passage constituent member 38 from the engaging surface 54 is formed between the inserting part 14 of the female member 10 and a fitting part 32 of the female member 12.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a one-touch joint structure and a piping system, and more particularly, to an improved joint structure capable of joining two flow path components with one touch, and such a joint structure. The present invention relates to a novel structure of a piping device having the same.

[0002]

2. Description of the Related Art In general, pipe members such as hoses and pipes that constitute fluid passages such as hydraulic pipes and pneumatic pipes, and flow path constituent members such as structural bodies (equipment) such as valves and pumps have different types and structures. Depending on the like, various joint structures are used to join each other.

[0003] As is well known, in the case where the above-mentioned pipe members are joined to each other, or when the pipe member and the structure are joined together, a tubular female member is attached to one of the tube members or the structure, and the other is attached. At the end of the tube material, an insertion portion to be inserted into the tubular female member is attached or integrally formed, so that the other tube material is used as a male member, and such a male member is formed.
A joint structure in which pipe members are connected to each other or a pipe member and a structural body are joined by inserting the male member and the female member by inserting into the female member at the insertion portion is often used. .

[0004] By the way, various structures have been conventionally proposed for such a joint structure, and as one of the structures, a structure described in US Pat. No. 4,193,616 is known. .

That is, as shown in FIG. 10, a tubular female member 72 having a male screw portion 70 on the outer peripheral surface is provided with a connection hole 76 provided in a structure 74 such as a valve.
And is screwed into and attached to a female screw portion 78 formed on the inner peripheral surface of the connection hole 76. Further, the pipe-shaped male member 80 has an insertion portion 79 to be inserted into the female member 72 at one end portion in the axial direction.

The female member 72 has a stepped inner peripheral surface in which an axially intermediate portion of the inner peripheral portion into which the male member 80 is inserted is reduced in diameter by a predetermined dimension with respect to both end portions. The inner peripheral surface of the small-diameter intermediate portion serves as a fitting surface 82 with respect to the outer peripheral surface of the male member 80, while the intermediate portion and the axially opposite end portions having a larger diameter are stepped. The two stepped surfaces are respectively the first and second engagement surfaces 8.
4,86. On the other hand, the insertion portion 79 of the male member 80
A first peripheral groove 88 and a second peripheral groove 90 are provided before and after in the insertion direction of the insertion portion into the female member 72, and the two peripheral grooves 88 and 90 are provided. In the first circumferential groove 88 located in the front in the insertion direction, the male member 80 and the female member 72 are fitted to each other, and come into contact with the respective opposing surfaces of the male member 80 and the structure 74, An O-ring 92 that seals between them is fluid-tightly housed with its outer peripheral portion protruding outward. In the second circumferential groove 90 located rearward in the insertion direction, an engagement ring 94 having an outer diameter larger than that of the insertion portion 79 and elastically deformable in the radial direction is provided on the insertion portion 79. It is housed in a state where it is pressed by a rigid band 96 that is slidably inserted outside, and is elastically deformed radially inward.

Then, as shown in FIG. 11, the insertion portion 79 of the male member 80 is inserted into the inner hole of the female member 72 and the male member 80 and the female member 72 are fitted as in the conventional case. This allows the male member 80 and the structure 74 to be joined together.
Particularly, when the insertion portion 79 of the male member 80 is inserted into the female member 72, the rigid band 96 engages with the first engagement surface 84 provided at one axial end of the inner peripheral portion of the female member 72. As a result, the integral movement with the male member 80 is prevented,
As the insertion portion 79 of the male member 80 is inserted into the female member 72, the outer peripheral surface of the male member 80 is slid in the direction opposite to the direction of the insertion movement. At this time, the engagement ring 92 in the second circumferential groove 90 is released from the pressing force of the rigid ring 94, but is pressed by the fitting surface 82 of the female member 72, and is still in the radial direction. The second circumferential groove 90 is elastically deformed toward
It is left in the accommodation position. The male member 80 is further inserted into the female member 72 while the engaging ring 94 is in sliding contact with the fitting surface 82 of the female member 72, and the engaging ring 94 is formed on the inner peripheral portion of the female member 72. When it is inserted until it reaches the position corresponding to the other axial end,
The engagement ring 92 is released from the pressing force of the fitting surface 82 and is made to protrude from the second peripheral groove 90, whereby the projecting portion of the engagement ring 92 from the second peripheral groove 90 is formed. And the second engaging surface 86 are engaged with each other in a direction opposite to the direction in which the male member 80 is inserted into the female member 72, so that the male member 80 and the female member 72 are Are prevented from moving relative to the female member 72 in the detaching direction.

Further, such a male member 80 and a female member 72
The female member 72 is disengaged from the connection hole 76 of the structure 74 when the female member 72 is engaged with the inner surface of the female member 72 on the formation side of the second engagement surface 86 in the disengaged state. Gap 9 formed between the opposing outer peripheral surface of male member 80
8, the engagement ring 94 is elastically deformed radially inward and is accommodated in the second peripheral groove 88, whereby the engagement of the engagement ring 94 with the second engagement surface 86 is released. Thus, the fitting between the male member 80 and the female member 72 can be released.

As described above, according to the joint structure disclosed in the above specification, the male member 80 is simply inserted into the female member 72 to a predetermined position, and the male member 80 is irremovably fitted. , To which the female member 72 is attached
The male member 80 can be joined with the male member 80 by one-touch operation. The female member 72 is detached from the structure 74 and a predetermined operation is performed.
The female member 72 can be disengaged from the female member 72.

However, in such a joint structure, when the male member 80 is inserted into the female member 72, the engagement ring 94 externally inserted into the male member 80 is fitted to the fitting surface 82 of the female member 72. When the male member 80 is inserted into the female member 72, the fitting surface 82 may be damaged by the engagement ring 94 in some cases. Then, in such a case, the male member 80 and the female member 72 are once released,
Thereafter, when fitting is performed again, the O-ring 92 externally inserted into the male member 80 is damaged by sliding on the damaged fitting surface 82, and as a result, the sealing performance of the O-ring 92 is greatly impaired. Such a problem is caused.

[0011]

Here, the present invention has been made in view of the circumstances described above, and the problem to be solved is that one of two flow path constituting members to be joined is A tubular female member is detachably attached, and the other flow path constituting member is a tubular male member. The male member is inserted into the inner hole of the female member, and the male member and the female member are fitted. By joining together, in a joint structure in which the two flow path components are joined, the two flow path components can be connected with one touch without impairing the sealing property between the two flow path components at all. An object of the present invention is to provide an improved structure of a joint structure that can be joined. Another object of the present invention is to provide a novel structure of a piping device including such a joint structure.

[0012]

According to the present invention, in order to solve the above-mentioned problem, a tubular female member is detachably attached to one of two flow path constituent members to be joined, through which a fluid flows. At the same time, the other flow path constituting member is formed into a tubular male member, the male member is inserted into the inner hole of the female member, and the female member and the male member are fitted to each other to form the second member. In the one-touch joint structure in which the two flow path constituent members are joined, the insertion portion of the male member with respect to the female member, the outer diameter of the front portion in the insertion direction is smaller than the outer diameter of the rear portion in the insertion direction. As a result, the distal end has a small-diameter portion, the base side has a stepped cylindrical shape with a large-diameter portion, and a small-diameter portion of the insertion site is provided with a first circumferential groove,
In the first circumferential groove, an engagement ring having an outer diameter smaller than the inner diameter of the female member and capable of being elastically deformed in the radial direction is accommodated and arranged so as to be able to reduce the diameter, and the large diameter portion of the insertion portion is provided. Providing a second peripheral groove, in the second peripheral groove, protruding from the outer peripheral surface of the large diameter portion, by contacting the inner peripheral surface of the female member, the male member and the female member An inner peripheral surface of the female member on which the small-diameter portion of the male member is located in a state where the annular member is inserted and fitted in the female member while the annular seal member is fluid-tightly sealed between the male member and the female member. In the portion, while providing a ridge extending in the circumferential direction, of the side surfaces on both sides in the axial direction of the ridge, at the rear side surface located on the rear side in the insertion direction of the male member, when inserting the male member,
The engagement ring is pressed, elastically deformed in the radial direction, pushed into the first circumferential groove, and forms a pressing surface to be accommodated, while the front side surface located on the front side in the insertion direction includes An engaging surface is formed to engage with a protruding portion of the engaging ring from the first circumferential groove, and the engagement of the ridge between the male member and the female member in the insertion fitting state. The gist is a one-touch joint structure in which an annular gap extending from the surface toward the one flow path component is formed.

In short, in the one-touch joint structure according to the present invention, the one-touch joint structure is detachably attached to one of the two flow path constituent members to be joined, and the other is connected to the other flow path constituent member. Is inserted into the male member until the joining ring provided on the male member engages with the engaging surface provided on the female member. By the engagement, the male member and the female member cannot be disengaged in the direction opposite to the insertion direction of the male member and are fitted to each other, so that the two flow path constituent members to be joined are formed. , Can be joined with one touch.

In this joint structure, when the female member is detached from one of the flow path constituting members, the engagement ring is radially inserted through the gap provided between the male member and the female member. If the male member is resiliently deformed and housed in the circumferential groove provided at the insertion portion of the male member, the engagement of the engagement ring with the engagement surface of the inner peripheral portion of the female member is released, and the male member The engagement between the and the female member is released, and they can be easily released.

Further, in the joint structure according to the present invention, a first peripheral groove is provided at a small diameter portion located forward in the insertion direction at a portion where the male member is inserted into the female member. An engagement ring having an outer diameter smaller than the inner diameter of the female member is accommodated and arranged in one circumferential groove, and a second circumferential groove is provided in a large diameter portion located on the rear side in the insertion direction. In the second circumferential groove, an annular seal member is
The large diameter portion protrudes from the outer peripheral surface and is accommodated. Then, by the insertion of the male member into the female member, the engagement ring provided on the small diameter portion is brought into contact with one of the axially opposite side surfaces of the ridge provided on the inner peripheral portion of the female member. And is elastically deformed inward in the radial direction, is once pushed into the peripheral groove, is accommodated therein, and then is protruded from the peripheral groove to be engaged with the engaging surface of the ridge. By being engaged, the male member and the female member are fitted together, and under the fitted state, the annular seal member provided on the large diameter portion contacts the inner peripheral surface of the female member. Thus, the space between the male member and the female member can be sealed.

Therefore, in such a joint structure according to the present invention, when the male member is inserted into the female member and the male member and the female member are fitted together, the male member and the female member fitted with each other are also connected. Even when releasing, the engagement ring provided on the small diameter portion of the male member may be brought into contact with the inner peripheral surface portion of the female member fitted to the outer peripheral surface of the large diameter portion of the male member. It can be eliminated completely, and the inner peripheral surface portion of such a female member can be advantageously prevented from being damaged by contact with the engagement ring. As a result, even if the joining and releasing of the two flow path constituent members are repeated by repeating the fitting and release of the male member and the female member, the male member and the female member are provided at the large diameter portion of the insertion portion of the male member. The seal member is damaged by the inner peripheral surface portion of the female member fitted to the outer peripheral surface of the large diameter portion,
It can be effectively prevented.

Therefore, according to the one-touch joint structure according to the present invention, the two flow path components can be repeatedly connected to each other without impairing the sealing performance between the two flow path components to be joined. It becomes possible to join with one touch.

According to a preferred embodiment of the one-touch joint structure according to the present invention, the one-touch joint structure has a tubular insertion portion which can be inserted into the gap formed between the male member and the female member. Then, the insertion portion is elastically deformed radially inward by inserting the engagement ring into the gap,
By using a release member provided with a pressing portion for pushing into the first circumferential groove, the engagement of the engagement ring with the engagement surface can be released.
According to the joint structure having such a configuration, the engagement of the engagement ring with the engagement surface can be performed more easily and smoothly, so that the male member and the female member can be more easily and quickly. It can be released.

According to another advantageous aspect of the one-touch joint structure according to the present invention, in the insertion portion of the male member into the female member, the insertion portion is divided into the large diameter portion and the small diameter portion. A step surface to be stepped is formed in a shape corresponding to the pressing surface of the ridge provided on the female member, and when the male member is inserted into the inner hole of the female member, By contacting the pressing surface of the member, a stopper surface is provided for regulating the insertion position of the male member with respect to the female member. With this configuration, by inserting the male member into the female member, it is possible to restrict the insertion position of the male member into the female member at a position where the engagement ring is engaged with the engagement surface. By inserting the male member into the female member until the insertion of the male member into the female member is restricted, the engagement state can be changed without checking whether the engagement ring is engaged with the engagement surface. It will be surely obtained.

According to the present invention, a structure having a connection hole for receiving a predetermined fluid through the connection hole, and a tubular outer peripheral portion at one end in the axial direction are provided.
A piping including a female member removably inserted and fixed in a connection hole of the structure, and a male member inserted into the female member from the other end in the axial direction and fitted with one touch. In the device, the insertion portion of the male member to the female member, the outer diameter of the insertion direction front side portion is smaller than the outer diameter of the insertion direction rear side portion,
The distal end has a small-diameter portion, and the base has a stepped cylindrical shape with a large-diameter portion. A small-diameter portion of the insertion portion is provided with a first peripheral groove, and the female member is provided in the first peripheral groove. An engagement ring having an outer diameter smaller than the inner diameter is elastically deformable in the radial direction.The engagement ring is accommodated and arranged so as to be able to reduce the diameter. An annular sealing member that protrudes from the outer peripheral surface of the large-diameter portion into the second peripheral groove and makes a fluid-tight seal between the male member and the female member by contacting the inner peripheral surface of the female member. On the other hand, when the male member is inserted and fitted into the female member, a ridge extending in the circumferential direction is provided on the inner peripheral surface of the female member where the small-diameter portion of the male member is located. At the same time, of the side surfaces on both sides in the axial direction of the ridge, the rear side in the insertion direction of the male member is located. On the rear side surface, when the male member is inserted, the engaging ring is pressed and elastically deformed in the radial direction to be pressed into the first peripheral groove to form a pressing surface to be accommodated. The front side surface located on the front side in the direction constitutes an engagement surface that engages with a protruding portion of the engagement ring from the first circumferential groove, and the male member and the male member under the insertion fitting state The gist of the present invention is also a piping device in which an annular gap extending from the engagement surface of the ridge toward the one flow path component is formed between the female member and the female member.

In the pipe apparatus according to the present invention as described above, the engagement ring provided on the small diameter portion of the insertion portion of the male member with respect to the female member is simply provided by the engagement ring provided on the inner peripheral portion of the female member. Only by inserting the male member into the female member until it engages with the surface, the male member and the female member are easily fitted together in a state in which detachment in the direction opposite to the insertion direction is prevented. Also, by disengaging the engagement ring with the engagement surface of the inner peripheral portion of the female member through a gap formed between the male member and the female member in the fitted state, The fitting state between the male member and the female member can be easily eliminated.

Also in this piping device, an engagement ring having an outer diameter smaller than the inner diameter of the female member is provided on the small diameter portion of the male member, and the engagement ring is pressed to be elastically deformed. Protrusions that provide a pressing surface and an engaging surface that engages with the engaging ring are provided on an inner peripheral surface portion of the female member where the small diameter portion of the male member is positioned under the inserted state of the male member with respect to the female member. Therefore, when the male member is inserted into and removed from the female member, the engagement ring is brought into contact with the inner peripheral surface portion of the female member fitted to the outer peripheral surface of the large diameter portion of the male member. And the inner peripheral surface portion of such a female member can be advantageously prevented from being damaged by contact with the engagement ring. Seal member extrapolated to the large diameter part of It like is caused to damage the inner peripheral surface portion of the female member is also as it can be effectively prevented.

Therefore, when the piping device according to the present invention is used, the male member and the female member, and furthermore, the structure for receiving the predetermined fluid and the male member can be extremely easily and one-touch without impairing the sealing property between them. It can be easily joined.

According to one preferred aspect of the piping device according to the present invention, in the insertion portion of the male member into the female member, the insertion portion is stepped into the large diameter portion and the small diameter portion. The step surface to be attached is formed in a shape corresponding to the pressing surface of the ridge provided on the female member, and the female member is inserted when the male member is inserted into the inner hole of the female member. Abuts against the pressing surface to form a stopper surface for restricting the insertion position of the male member with respect to the female member. With this configuration, by inserting the male member into the female member, it is possible to restrict the insertion position of the male member into the female member at a position where the engagement ring is engaged with the engagement surface. By inserting the male member into the female member until the insertion of the male member into the female member is restricted, the engagement state can be changed without checking whether the engagement ring is engaged with the engagement surface. It will be surely obtained.

According to another advantageous aspect of the piping device according to the present invention, a female screw is provided on an inner peripheral surface of a connection hole of the structure, and the female member is provided at one axial end of the female member. On the outer peripheral surface, a male screw that can be screwed to the female screw is provided, and the female member is removably inserted and fixed in the connection hole of the structure by screwing the female screw and the male screw. Between the female member and the structure in the fixed state, in contact with the opposite surfaces of the female member and the structure, and a fluid flows between the female member and the structure. An annular second seal member that tightly seals is provided.

In the piping device having such a configuration,
The structure and the female member can be easily detachably fixed by screwing the female screw and the male screw provided respectively, and between the facing surfaces of the structure and the female member in a fixed state. From the place where the annular seal member is provided, in order to secure the sealing property between the structure and the female member, for example, a seal tape or the like is wound around the male screw forming portion of the female member, or an appropriate The necessity of applying a sealant can be eliminated at all, so that superior usability can be sufficiently exhibited.

According to another preferred aspect of the piping device according to the present invention, a flange portion projecting radially outward is provided on an outer peripheral portion of the female member at the other axial end. In a state where the female member is inserted into the connection hole of the body, the female member is provided so as to face the end face of the structure, and between the end face of the structure and the face of the flange portion facing the end face, The second seal member will be provided.

In the piping device having such a configuration, for example, an annular seal member is provided between the outer peripheral portion of the female member where the male screw is formed and the inner peripheral portion of the structure where the female screw is formed. Alternatively, it can be advantageously prevented that the seal member breaks or is damaged, such as biting into the threaded portion of the external thread of the female member and the internal thread of the structure, whereby the female member and the female member can be prevented from being damaged. Higher reliability can be effectively secured in the sealing property between the structure and the structure.

[0029]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, in order to clarify the present invention more specifically, a one-touch joint structure according to the present invention will be described.
Specific configurations thereof will be described in detail with reference to the drawings showing a piping device having a structure according to the present invention.

First, FIG. 1 shows an example of a piping device having a structure according to the present invention which is advantageously used for realizing a one-touch joint structure according to the present invention, which is incorporated into a pneumatic piping in an air brake system of an automobile. The piping arrangement to be used is shown schematically. As is apparent from FIG. 1, the piping device includes a valve 11 as a structure for receiving a predetermined fluid, a female member 12 detachably attached to a connection hole 13 of the valve 11,
The female member 12 has a male member 10 which is inserted into the inner hole and fitted therein.

Then, the male member 1 constituting this piping device
Numeral 0 is made of a metal pipe, and an end portion on one axial side (the right side in FIG. 1) is an insertion portion 14 to be inserted into the female member 12. The insertion portion 14 of the male member 10 has a relatively thick wall as a whole, in which the outer diameter of the front portion in the insertion direction with respect to the female member 12 is smaller than the outer diameter of the rear portion in the insertion direction. It has a stepped cylindrical shape, and approximately half of the distal end side of the insertion portion 14 is formed as a small-diameter portion 20, while the base portion, in other words, the remaining portion on the axial center portion side of the male member 10. Half is formed as a large diameter portion 18. Further, in such an insertion portion 14, a step surface for stepping the large diameter portion 18 and the small diameter portion 20 has a tapered surface shape corresponding to a shape of a pressing surface 52 of a ridge 48 in the female member 12 described later. A stopper surface which is formed to contact the pressing surface 52 when the insertion portion 14 is inserted into the inner hole of the female member 12 and regulates the insertion position of the insertion portion 10 into the female member 12. 16 is set.

The outer peripheral portion of the large-diameter portion 18 in the insertion portion 14 of the male member 10 has a receiving groove as a second peripheral groove extending continuously in the circumferential direction at a position close to the small-diameter portion 20. A rubber O-ring 24 as an annular sealing member having an outer diameter that is larger than the large-diameter portion 18 by a predetermined dimension is provided in a portion where the accommodation groove 22 is formed. The outer portion is externally inserted in a state where the peripheral portion is accommodated in the accommodation groove 22 and the outer peripheral portion is projected outward from the accommodation groove 22.

Further, a circumferential groove 26 as a first circumferential groove extending continuously in the circumferential direction is formed at the axially intermediate portion of the outer peripheral portion of the small diameter portion 20 in the insertion portion 14 of the male member 10. In addition, an engagement ring 28 having a circular cross section is externally inserted into a portion where the circumferential groove 26 is formed. The circumferential groove 26 has a depth and a width larger by a predetermined dimension than the diameter of the circular cross section of the engagement ring 28, and of the large diameter portion 18 in the insertion portion 14 of the two side walls. An inclined wall which is inclined in the direction opposite to the forming side, in other words, the opening side portion of the side wall located at the distal end side of the insertion portion 14 gradually widens the opening width of the peripheral groove 26 outward. The unit 30 is provided.

The engagement ring 28 is made of a metal material having elasticity or flexibility, and has an outer diameter larger than the outer diameter of the small diameter portion 20 and smaller than the outer diameter of the large diameter portion 18. It has an inner diameter smaller than the outer diameter of the portion, has a substantially C-shaped overall shape in which a part of the annular shape is missing, and is thereby elastically deformable in the radial direction. I have. The engagement ring 28 allows the inner peripheral portion to be accommodated in the peripheral groove 26 and the outer peripheral portion to be accommodated in the peripheral groove 2.
6 with the male member 1 protruding outward through the opening.
0 is externally arranged in the small-diameter portion 20 of the insertion portion 14, and under such an arrangement state, by elastically deforming inward in the radial direction, the entirety of the peripheral groove 26 is formed.
(Fig. 3
reference).

On the other hand, the female member 12 is formed as a whole by a straight pipe made of a predetermined metal material having a substantially cylindrical shape, and an inner peripheral portion thereof is fitted to the male member 10. On the other hand, one side (the right side in FIG. 1) of the outer peripheral portion in the axial direction is a mounting portion 34 that is mounted on the valve 11. Also, this mounting part 3
4 has a male screw portion 36 formed of a parallel screw. Then, the female member 12 is inserted into the connection hole 13 provided in the valve 11 at a portion on one axial side where the mounting portion 34 is formed. The male screw portion 36 of the connection hole 13
By being screwed into a female screw portion 40 provided on the inner peripheral surface of the valve 11, the valve 11 is detachably fixed to the valve 11.

Here, in particular, the male screw portion 36 is formed in a portion where the male screw portion 36 is not formed on the other side (left side in FIG. 1) of the mounting portion 34 of the female member 12 in the axial direction. A rubber O-ring 42 as an annular second seal member having an outer diameter larger than that of the part is located at the extrapolated position. Then, in a state where the female member 12 is attached to the connection hole 13 of the valve 11 at the attaching portion 34, the O-ring 42 is connected to the outer peripheral surface of the attaching portion 34 of the female member 12 where the O-ring 42 is inserted. The inner peripheral surface of the connection hole 13 of the valve 11 is brought into contact with the inner peripheral surface thereof under elastic deformation, so that the space between the mounting portion 34 of the female member 12 and the valve 11 is hermetically sealed. It can be done. The O-ring 42 is sandwiched between an outer flange 44 adjacent to the mounting portion 34 and integrally formed adjacent to the mounting portion 34 and the external thread portion 36 of the mounting portion 34 on the other axial side of the outer peripheral portion of the female member 12. Position of the female member 12 in the mounted state of the female member 12 with respect to the valve 11.
From the mounting portion 34 can be prevented.

On the other hand, the fitting portion 32 composed of the inner peripheral portion of the female member 12 has an inner diameter slightly larger than the outer diameter of the large diameter portion 18 in the insertion portion 14 of the male member 10. And the fitting part 3 of such a female member 12
2, the other axial portion, that is, the peripheral portion of the opening on the side where the outer flange portion 44 is formed on the outer peripheral portion has a tapered surface that gradually increases the opening diameter outward. The guide portion 46 has a shape, and a protrusion 48 is integrally formed on one side in the axial direction, that is, on the side on which the attachment portion 34 is formed on the outer peripheral portion. The ridge 48 has a trapezoidal vertical cross-sectional shape that gradually narrows toward the tip, and is formed so as to extend continuously in the circumferential direction of the fitting portion 32.
The outer diameter of the large-diameter portion 18 of the insertion portion 14 of the male member 10 and the engagement ring 2 that is externally inserted into the small-diameter portion 20 of the insertion portion 14
8, and is slightly smaller than the difference between the outer diameter of the large diameter portion 18 and the outer diameter of the small diameter portion 20.

FIGS. 2 to 4 show a process of inserting the male member 10 into the female member 10 when the male member 10 is inserted into the female member 12 and a fitting state thereof.
As is clear from FIG. 2, the distal end surface of the ridge 48 formed in the fitting portion 32 of the female member 12 is smaller than the outer diameter of the large-diameter portion 18 in the insertion portion 14 of the male member 12 and is smaller than the small-diameter portion 2.
It has a cylindrical surface shape having a diameter slightly larger than the outer diameter of 0, and slides on the small diameter portion 20 of the male member 10 when the male member 10 is inserted into the female member 12 (during the fitting operation). In addition, the contact surface 50 is positioned so as to be in contact with the small diameter portion 20 in a state where the female member 12 is fitted to the male member 10 (under completion of the fitting operation).

Of the side surfaces on both sides in the axial direction of the ridge 48, the side of the female member 12 on which the guide portion 46 is formed, in other words,
The rear side surface located on the rear side in the insertion direction of the male member 10 into the female member 12 is inclined toward the guide portion 46 forming side from the tip of the ridge 48 toward the base side, and the taper angle is relatively small. The male member 10 to the female member 1
2, the male member 10 comes into contact with the engagement ring 28 externally inserted into the small-diameter portion 14 of the male member 10, and the engagement ring 28
Is pressed inward in the radial direction to be pressed into the accommodation groove 26.

Further, the pressing surface 52 of the ridge 48
The side surface opposite to the side surface, that is, the front side surface located on the front side in the inserting direction of the male member 10 into the female member 12 is the pressing surface 5 from the tip of the ridge 48 toward the base side.
2, the taper angle is very large, in other words, a taper surface shape close to a vertical surface shape perpendicular to the axial direction, and the female member 12 In the fitted state, the engagement surface 54 is engaged with a portion of the engagement ring 28 protruding from the accommodation groove 26.

As shown in FIG. 4, here, the outer peripheral surface of the large-diameter portion 18 in the insertion portion 14 of the male member 10,
Guide portion 46 and ridge 48 in insertion portion 14 of female member 12
The inner peripheral surface of the portion between the inner member and the inner member is slidably contacted with each other in a state where the fitting portion 32 of the female member 12 is fitted to the insertion portion 14 of the male member 10. Thereby, the large diameter portion 1 in the insertion portion 14 of the male member 10
8 and the inner peripheral surface of the portion between the guide portion 46 and the ridge 48 in the insertion portion 14 of the female member 12 correspond to the insertion portion 14 of the male member 10 and the fitting portion 32 of the female member 12, respectively. And the male member 10 and the female member 12 can be relatively rotated about their central axes when the male member 10 and the female member 12 are fitted. It is like that.

In the present embodiment, the inner diameter of the fitting portion 32 of the female member 12 is larger than the outer diameter of the small diameter portion 20 of the male member 10 by a predetermined dimension, so that the female member 12 is fitted. In the portion 32, the inner peripheral surface of the female member 12 opposite to the fitting surface 58 across the ridge 48 is
In the state where the small-diameter portion 20 is fitted to the male member 10, the separation surface 60 is spaced apart from the small-diameter portion 20 of the insertion portion 14 by a predetermined dimension in the radial direction. Between the female member 1 and the engaging surface 54 of the ridge 48.
An annular gap 62 extending toward the valve 11 to which the second member 2 is attached, opening into the inner hole of the valve 11, and extending continuously in the circumferential direction is formed. Then, through the gap 62, the engagement ring 28 is exposed to the outside toward the inside of the inner hole on the valve 11 side at a portion opposite to the engagement portion with the engagement surface 52. It is becoming.

When the male member 10 and the valve 11 are connected to each other in the piping device having such a structure, for example, the operation is performed as follows.

That is, first, as shown in FIG.
The female member 12 is inserted into the connection hole 13 of the valve 11,
The male screw part 3 of the mounting part 34 is attached to the female screw part 40 of the connection hole 13.
6 is attached to the valve 11 by screwing.
The male member 10 and the female member 12 are coaxially moved while the opening-side end of the insertion portion 14 of the male member 10 and the end of the insertion portion 14 of the female member 12 on the guide portion 46 side face each other. And spaced apart in the axial direction.

Next, as shown in FIG.
The insertion portion 14 of the female member 12 is inserted into the fitting portion 32 of the female member 12, and in this state, the male member 10 is moved toward the side of the female member 12 where the ridge 48 is formed (in FIG. (In the direction shown by the arrow)). That is, the insertion portion 14 of the male member 10 is
The insertion is gradually moved into the second fitting portion 32.

At this time, since the guide portion 46 having a tapered surface shape is provided at the end portion of the fitting portion 32 of the female member 12, the operation of inserting the male member 10 into the female member 12 is easier. Can be performed. As described above, since the fitting surface 58 of the fitting portion 32 of the female member 12 has an inner diameter slightly larger than the outer diameter of the large diameter portion 18 of the male member 10, the female member At the time of insertion into the member 12, the large-diameter portion 1 extrapolated to the small-diameter portion 20 of the male member 10
The engagement ring 28 having an outer diameter smaller than 8 and the fitting surface 58 of the female member 12 are not brought into contact at all. The insertion of the male member 10 into the female member 12 causes the engagement ring 28 to come into contact with the pressing surface 52 of the ridge 48 in the fitting portion 32 of the female member 12. The tapered surface 52 acts as a cam surface for the engagement ring 28, and the engagement ring 28
Is pressed radially inward by the pressing surface 52, and as shown in FIG. 3, the pressing surface 52 and the contact surface 5
0, the engagement ring 28 is elastically deformed inward in the radial direction, and the entirety of the engagement ring 28 is
0 so as to be pushed into the peripheral groove 26 provided in
It will be accommodated. Thus, the insertion of the male member 10 into the female member 12 can be performed smoothly, and the fitting surface 5
8 can be prevented from being damaged by contact with the engagement ring 28.

Here, the insertion portion 14 of the male member 10 is used.
Since the inclined wall portion 30 is provided at the opening side portion of the side wall of the peripheral groove 26 located at the tip side of the
When the pressing member 8 is pressed by the pressing surface 52, the guiding member 8 is guided by the inclined wall portion 30 and is more smoothly pressed into the circumferential groove 26. On the large diameter portion 18 side of the insertion portion 14 of the male member 10, as the male member 10 is inserted into the female member 12, the fitting surface 58 of the female member 12 is brought into contact with the fitting surface 56 of the male member 10. The O-ring 24, which is brought into sliding contact with the large-diameter portion 18 of the insertion portion 14 of the male member 10, moves between the fitting surface 58 of the female member 12 and the bottom surface of the housing groove 22 of the male member 10. In the compressed and elastically deformed state, the fitting surface 58 of the female member 12 and the accommodation groove 22 of the male member 10 are formed.
Contact with the bottom surface. This allows the O-ring 24 to hermetically seal the space between the insertion portion 14 of the male member 10 and the fitting portion 32 of the female member 12.

Then, as shown in FIG. 4, the ridges 48 on the female member 12 are changed from the state described above.
Until the entire surface of the contact surface 50 of the male member 12 reaches a position where it can be brought into contact with the outer peripheral surface of the portion of the small diameter portion 20 of the male member 12 closer to the large diameter portion 18 than the portion where the peripheral groove 26 is formed.
0 is inserted into the female member 12. Thereby, the female member 1
2, the engaging surface 54 of the ridge 48 is positioned on the outer peripheral surface of the portion of the small diameter portion 20 of the male member 12 closer to the large diameter portion 18 than the portion where the peripheral groove 26 is formed. Eliminating the radially inward elastic deformation of the engagement ring 28 due to the pressing of the distal end surface 54 and the engagement ring 52, the outer peripheral portion of the engagement ring 28 is again projected from the peripheral groove 26, and
The outer peripheral portion of the engagement ring 28 is engaged with the engagement surface 54 of the ridge 48 of the female member 12 on the outer surface opposite to the direction in which the male member 10 is pulled out of the female member 12 and separated therefrom. When the male member 10 is further inserted into the female member 12 in such a state, as described above, the pressing surface 52 of the ridge 48 on the female member 12 and the insertion portion 14 of the male member 10 are inserted. The stopper member 16 is brought into contact with the stopper member 16 to restrict the insertion movement thereof.
Can be prevented from being excessively inserted into the female member 12.

Thus, the male member 10 and the female member 12 are prevented from moving relative to each other in the direction in which the insertion portion 14 of the male member 10 is disengaged from the fitting portion 32 of the female member 12.
Are fitted to each other, so that the male member 10
With respect to the valve 11 attached to the female member 12,
The male members 10 are joined so as to be relatively rotatable about the central axis.

As described above, such a male member 1
When the female member 12 is engaged with the female member 12, the female member 12 is attached between the outer peripheral surface of the small diameter portion 20 in the insertion portion 14 of the male member 10 and the separation surface 60 of the fitting portion 32 of the female member 12. The opening 62 is formed to open into the inner hole of the valve 11, and the outer peripheral portion of the engagement ring 28 engaged with the engagement surface 54 of the ridge 48 of the male member 12 forms the clearance. Through 62, it is exposed to the outside. Here, the ridges 48 on the female member 12 are provided under the condition where the male member 10 and the female member 12 are fitted.
The entire surface of the contact surface 50 of the male member 12 is adapted to be brought into contact with the outer peripheral surface of the small-diameter portion 20 of the male member 12 at a portion closer to the large-diameter portion 18 than the portion where the peripheral groove 26 is formed. That is, the rattling of the female member 12 in the radial direction can be advantageously prevented.

On the other hand, the female member 12 and the male member 10 attached to the valve 11 joined to the male member 10 in this manner are fitted to each other by using, for example, a release ring as a release member. Can be easily released.

That is, as is clear from FIG. 5, the release ring 64 used here is made of a predetermined metal material and has a small diameter portion 20 in the insertion portion 14 of the male member 10.
Having an inner diameter slightly larger than the outer diameter of
It has a thick annular shape. A thin-walled cylindrical insertion portion 66 is coaxially disposed on one end surface in the axial direction of the release ring 64 with a predetermined extension length from the peripheral edge of the opening of the end surface toward one side in the axial direction. It is integrally formed so that it may extend. Further, the insertion portion 66 is provided on the separation surface 6 of the fitting portion 32 of the female member 12.
0 has an outer diameter that is slightly smaller than the inner diameter of the formation site, so that its thickness is reduced by the male member 10 and the female member 1.
2 can be inserted into the gap 62 formed between the outer peripheral surface of the small diameter portion 20 of the insertion portion 14 of the male member 10 and the separation surface 60 of the fitting portion 32 of the female member 12. It is said to be thick. Furthermore, in the insertion portion 66 of the release ring 64, the inner peripheral portion of the distal end portion has a tapered surface shape or a curved surface shape that gradually increases the opening diameter of the distal end opening outward. Pressing part 6 exhibiting
It is eight.

In order to release the fitted state between the male member 10 and the female member 12 using such a release ring 64, first, as shown in FIG. After removal, with the end surface of the release ring 64 on the side where the insertion portion 66 is formed facing the distal end surface of the insertion portion 14 of the male member 10 inserted into the female member 12,
The release ring 64 and the male member 10 are positioned coaxially and spaced apart in the axial direction.

Next, as shown in FIG. 6, the release ring 64 is externally inserted into the small diameter portion 20 of the insertion portion 14 of the male member 10 from the side where the insertion portion 66 is formed. In the direction in which the insertion portion 66 is inserted into the gap 62 formed between the male member 10 and the female member 12 while sliding the inner peripheral surface thereof on the outer peripheral surface of the small diameter portion 20 (FIG. 6). , The arrow is gradually moved in the direction indicated by the arrow (a). At this time, a pressing portion 68 having a tapered surface shape or a curved surface shape for gradually increasing the opening diameter of the distal end opening outward is provided in the inner peripheral portion of the distal end of the insertion portion 66 of the release ring 64. By doing so, the operation of extrapolating the release ring 64 to the small diameter portion 20 of the male member 10 can be performed more easily.

Then, as shown in FIG.
The release ring 64 is further moved until the tip of the insertion portion 66 inserted into the gap 62 is brought into contact with the engagement surface 54 of the ridge 48 of the female member 12. At this time, the engagement ring 28 externally inserted into the small diameter portion 20 of the male member 12 is brought into contact with a pressing portion 68 provided on the inner peripheral portion at the distal end of the insertion portion 66 at the outer peripheral portion protruding from the peripheral groove 26. That is, since the pressing portion 68 has the tapered surface shape or the curved surface shape as described above, the inner peripheral surface of the pressing portion 68 acts as a cam surface for the engagement ring 28, and the engagement ring 28 is pressed radially inward by the pressing portion 68 to be elastically deformed radially inward, so that the entire engagement ring 28 is provided on the small diameter portion 20 of the male member 12. It is pushed again into the circumferential groove 26 and is housed. Female member 1
The engaging surface 54 of the second ridge 48 is pressed at the tip of the insertion portion 66 of the release ring 64 in the insertion direction of the insertion portion 66, but the pressing surface 52 of the ridge 48 is Is brought into contact with the stopper surface 16 of
The female member 12 is not moved in the insertion direction of the release ring 64.

Thus, the engagement of the engagement ring 28 with the engagement surface 54 of the projection 48 of the female member 12 is released. Here, as described above, the circumferential groove 2 located on the distal end side of the insertion portion 14 of the male member 10 is used.
6, since the inclined wall portion 30 is provided at the opening side portion of the side wall of the engaging member 28 in the same manner as when the engaging surface 28 is pressed by the pressing surface 52 of the ridge 48 of the female member 12.
Is guided by the inclined wall portion 30 by the pressing of the pressing portion 68, and is smoothly pushed into the peripheral groove 26.

Thereafter, as shown in FIG. 8, a state in which the distal end of the pressing portion 68 of the insertion portion 66 of the release ring 64 is kept in contact with the engaging surface 54 of the ridge 48 of the female member 12, in other words, For example, the engagement member 28 is housed in the circumferential groove 26, and the engagement of the engagement ring 28 with the engagement surface 54 of the protrusion 48 of the female member 12 is maintained.
0 is a direction in which the insertion portion 14 is disengaged from the inside of the fitting portion 32 of the female member 12 (in FIG. 8, an arrow: a direction indicated by c).
Then, relative movement with respect to the female member 12 is performed.

At this time, the small diameter portion 20 of the insertion portion 14 of the male member 10 is disengaged from the inside of the release ring 64, and the peripheral groove 26 forming portion of the small diameter portion 20 is The engagement ring 28 is kept in contact with the inner peripheral surface of the release ring 64 and the contact surface 50 of the ridge 48 of the
, And is prevented from protruding from the circumferential groove 26. In addition, since the pressing portion 68 of the release ring 64 and the engaging surface 54 of the ridge 48 of the female member 12 are formed in a tapered surface shape that expands to opposite sides, the pressing portion 68 Under the contact state, a V-shaped space is formed between the pressing portion 68 and the engagement surface 54,
Here, since the taper angle of each of the pressing portion 68 and the engaging surface 54 is increased, such a V-shaped space is formed with a width that the engaging ring 28 cannot completely enter. When the male member 10 is disengaged from the fitting portion 32 of the female member 12, the engagement ring 28 is pushed into the V-shaped space between the pressing portion 68 and the engagement surface 54. Nothing.

Then, the male member 10 is further moved relative to the female member 12 in the above-described direction, so that the insertion portion 14 of the male member 10 is moved to the female member 1.
Thus, the male member 10 and the female member 12 are released from the fitted state by completely removing them from the inside of the second fitting portion 32.

As described above, in the present embodiment, the male member 10
The male member 10 and the female member 12 are fitted with each other only by inserting the insertion portion 14 of the female member 12 into the fitting portion 32 of the female member 12 to a predetermined position in a state where their movement in the disengaging direction is prevented. The male member 10 and the valve 11 to which the female member 12 is attached can be squeezed.
It can be easily and quickly joined with one touch.

Further, in the present embodiment, the male member 1
0 when the female member 12 is inserted into the female member 12,
Can be prevented from being damaged by contact with the engagement ring 28, and is brought into contact with the mating surface 58 of the female member 12 so that the male member 1
The O-ring 24 that seals between the 0 and the female member 12 can be effectively prevented from being damaged by contact with the fitting surface of the female member 12.

Therefore, in the present embodiment, the male member 10 and the valve 11 constituting the pneumatic pipe can be connected very easily with one touch while effectively securing the sealing property therebetween. You can be crushed.

In the present embodiment, the release ring 64 is used to simply insert the release ring 64 into the gap 62 formed between the fitted male member 10 and female member 12. In this way, the fitting state between the male member 10 and the female member 12 can be freely and easily released at any time, so that, for example,
The O-ring 24 disposed between the insertion portion 14 of the male member 10 and the fitting portion 32 of the female member 12 to hermetically seal the space therebetween can be easily replaced at any time,
Even when a foreign substance or the like enters between the insertion section 14 and the fitting section 32, the foreign substance or the like can be easily and quickly removed. As a result, the reliability of the joint portion between the male member 10 and the valve 11 joined together and the airtightness of the pneumatic pipe can be more effectively improved.

Further, in this embodiment, the female member 1
The engagement ring 2 is engaged with the engagement surface 54 of the ridge 48 of the female member 12 in a state in which the engagement ring 2 is removed from the valve 11.
8 is a male member 10 and a female member 12
6 formed between the respective insertion portions 14 and 32
2 to be exposed to the outside.
Then, the outer peripheral portion of the engagement ring 28 is pressed radially inward by the pressing portion 68 of the insertion portion 66 of the release ring 64 inserted into the gap 62, and is elastically deformed. From where the engagement of the mating ring 28 with the engagement surface 54 is released,
For example, the engagement ring 28 can be easily and reliably elastically deformed inward in the radial direction, as compared with a case where the inner peripheral portion of the engagement ring 28 is pressed inward in the radial direction. Such an operation of releasing the engagement of the engagement ring 28 with the engagement surface 54, in other words, an operation of releasing the engaged state between the male member 10 and the female member 12 can be performed more easily and reliably. .

Furthermore, in the present embodiment, when the male member 10 is inserted into the female member 12, the fitting surface 5
8 and the engagement ring 28 are prevented from contacting at all.
8 can be advantageously prevented from being broken or damaged.

In the present embodiment, the male member 10
Is inserted through the female member 12 and the insertion portion 14 of the male member 10 is inserted.
When the engagement ring 28 provided on the female member 12 is engaged with the engagement surface 54 of the ridge 48 provided on the female member 12, the pressing surface 52 of the ridge 48 From the point at which the male member 10 is inserted into the female member 12 until the male member 10 is inserted into the female member 12. When the male member 10 is inserted into the female member 12, the engaged state can be surely obtained without checking each time whether the engaging ring 28 is engaged with the engaging surface 54.

Further, in this embodiment, the male member 1
The release ring 64 used to release the fitted state of the female member 12 from the female member 12 has an overall annular shape, and a thin cylindrical insertion portion 66 is integrally formed on one end surface of the annular shape. The male member 10 and the female member 1 are made of a relatively simple metal ring.
There is also an advantage that the cost required for enabling the disengagement state of 2 can be extremely low.

Further, in the present embodiment, a male screw portion 36 is provided on the outer peripheral surface of the mounting portion 34 of the female member 12, and the female member 12 is connected to the connection hole 13 of the valve 11 by the male screw portion 36. Is fixed to the valve 11 by being screwed into a female screw portion 40 provided on the inner peripheral surface of the female member 12. Under such a fixed state, O is externally inserted into the mounting portion 34 of the female member 12. The ring 42 allows the female member 12
Since the space between the mounting portion 34 and the inner peripheral portion of the connection hole 13 of the valve 11 can be hermetically sealed,
For example, a taper screw is formed in the mounting portion 34, and a sealing tape or the like is wound around the taper screw, or an appropriate sealing agent is applied, so that the airtightness between the mounting portion 34 and a member attached thereto is reduced. Unlike the conventional products that ensure the clearance between the mounting portion 34 and the members attached thereto without performing any troublesome operations such as winding the sealing tape or applying the sealing agent or the like. Liquid tightness and air tightness can be secured very easily and effectively. In addition, since it is not necessary to wind a seal tape or the like or apply an appropriate sealing agent to the mounting portion 34, it is necessary to provide the mounting portion 34 with a parallel screw which is easier to form than a tapered screw. Can be done.

Although the specific configuration of the present invention has been described in detail above, this is merely an example, and the present invention is not limited by the above description.

For example, in the above embodiment, the inner peripheral portion and the outer peripheral portion of the female member 12 correspond to the fitting portion 32 and the mounting portion 3 respectively.
Although the number is set to 4, it is also possible to configure the portions on the one side and the other side in the axial direction of the female member 12 as the fitting portion 32 and the mounting portion 34, respectively.

In the above embodiment, the insertion portion 14 is formed integrally with one end of the male member 10 in the axial direction.
The insertion portion 14 separate from the male member 10 may be attached to the male member 10 by a known fixing member or the like.

Further, in the above-described embodiment, rubber O-rings 24 and 42 as annular sealing members are provided on the large diameter portion 18 of the male member 10 and the mounting portion 34 of the female member 12, respectively. As such an annular sealing member,
Between the male member 10 and the female member 12 or between the female member 12 and the valve 1
Any known sealing member other than the rubber O-rings 24 and 42 can be used as appropriate as long as it can seal fluid-tightly between the two.

The number of O-rings 24 as annular sealing members provided on the large diameter portion 18 of the male member 10 is not limited to the number shown in the above embodiment.
For example, as shown in FIG.
It is, of course, possible to provide two or more than eight so as to be located at the front and rear in the insertion direction of the female member 12 in the female member 12.

Further, an O as an annular sealing member provided between the female member 12 and the valve 11 as a structure.
The arrangement position of the ring 42 is not limited to the position shown in the above embodiment, and may be provided between the facing surfaces of the female member 12 and the valve 11 which is a structural body.
Therefore, as shown in FIG. 9, it may be disposed between the outer flange portion 44 formed on the outer peripheral portion of the female member 12 and the facing surface of the valve 11. By doing so, the O-ring 42
However, unlike the case where the external thread is externally inserted into the mounting portion 34 of the female member 12, the male screw portion 36 of the female member 12 and the threaded portion of the female thread portion 40 of the valve 11 bite or are damaged or damaged. Such can be advantageously avoided. Also, the location and number of such O-rings 42 are not limited to one location and one, but a plurality of O-rings 42 are externally inserted into the mounting portion 34 of the female member 12 and the female member 12 Outer flange 44 and valve 1
Even if two or more pieces are arranged between the surfaces opposed to 1, there is no problem.

Further, in the above embodiment, the female member 12
The mating portion 32 is provided with a separation surface 60 that is radially separated from the insertion portion 14 of the male member 10 in a state where the female member 12 is fitted with the male member 10. A gap 62 is formed between the surface 60 and the insertion portion 14 of the male member 10.
4 is provided with a separating surface which is positioned radially away from the fitting portion 32 of the female member 12 in a fitting state with the female member 12, and the separating surface of the male member 10 and the female member 12 are provided. It is of course possible to form a gap 62 between the fitting portion 32 and the fitting portion 32.

In the above embodiment, when the male member 10 and the female member 12 are fitted together, the male member 10 and the female member 1
The operation of releasing the engagement of the engagement ring 28 with the engagement surface 54 through the gap 62 formed between the two insertion portions 14 and 32 has an insertion portion 66 that can be inserted into the gap 62. The release ring 64 has been used, but if the engagement of the engagement ring 28 with the engagement surface 54 can be released through the gap 62, such a release ring 64 is not necessarily used. It is.

In addition, in the above embodiment, the present invention relates to a piping device having a male member, a female member, and a valve incorporated in a pneumatic pipe in an air brake system of an automobile, and a one-touch connection of a male member and a valve. Although specific examples of those applied to the joint structure are shown, the present invention is also applicable to various structures other than valves such as a pump for receiving a predetermined fluid and a male member and a female member incorporated in a fluid flow path other than a pneumatic pipe. Of course, the present invention can also be advantageously applied to a piping device having a body and a joint structure in which two members of various flow path components are joined with one touch.

In addition, although not enumerated one by one, the present invention
Based on the knowledge of those skilled in the art, various changes, modifications, improvements and the like can be performed in embodiments, and unless such embodiments depart from the spirit of the present invention.
Both are included in the scope of the present invention,
Needless to say.

[0079]

As is apparent from the above description, according to the one-touch joint structure according to the present invention, the two channel components to be joined can be sealed without impairing the sealing property between them at all. The flow path constituent members can be joined many times with one touch.

Further, if the piping apparatus according to the present invention is used,
The male member and the female member, and thus the structure for receiving the predetermined fluid and the male member, can be joined very easily with a single touch without impairing the sealing property between them.

[Brief description of the drawings]

FIG. 1 is a partially sectional explanatory view showing an example of a piping device according to the present invention.

FIG. 2 is an explanatory view showing an example of a use state of the piping device shown in FIG. 1, showing a state in which a male member is inserted into a female member when a male member and a female member are fitted to each other. I have.

FIG. 3 is an explanatory view showing another example of a use state of the piping device shown in FIG. 1; when a male member and a female member are fitted together, the male member is inserted into the female member; The state where the engagement ring was pushed into the circumferential groove is shown.

FIG. 4 is an explanatory view showing still another example of a use state of the piping device shown in FIG. 1, wherein the male member and the female member are fitted by engaging an engagement ring with an engagement surface. This shows a squeezed state.

FIG. 5 is an explanatory view showing another example of the use state of the piping device shown in FIG. 1, in which a release ring is arranged at a predetermined position when the fitting state of the male member and the female member is released. The state is shown.

FIG. 6 is an explanatory view showing still another example of the use state of the piping device shown in FIG. 1, and when releasing the fitted state of the male member and the female member, the insertion portion of the release ring is made male. The state where it inserted in the clearance gap between a member and a female member is shown.

FIG. 7 is an explanatory view showing another example of the use state of the piping device shown in FIG. 1; when the fitting state of the male member and the female member is released, the insertion portion of the release ring is inserted into the male member; 2 shows a state in which the engagement ring has been inserted into the gap between the female member and the female member, and the engagement ring has been pushed into the circumferential groove.

FIG. 8 is an explanatory view showing still another example of a use state of the piping device shown in FIG. 1, and illustrates an engagement surface of an engagement ring when releasing a fitting state between a male member and a female member. 2 shows a state in which the engagement with is completely released.

FIG. 9 is a view corresponding to FIG. 4, showing another example of the piping device according to the present invention.

FIG. 10 is a partially sectional explanatory view showing an example of a conventional piping device.

FIG. 11 is a partially sectional explanatory view showing a usage state of the piping device shown in FIG. 10;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 Male member 12 Female member 13 Valve 14 Insertion part 16 Stopper surface 22 Housing groove 24 O-ring 26 Peripheral groove 28 Engagement ring 38 Connection hole 48 Protrusion 50 Contact surface 52 Press surface 54 Engage surface 56, 58 Fit surface 60 Separation surface 62 Gap 64 Release ring 66 Insertion section 68 Press section

Claims (7)

[Claims] 1. A tubular female member is removably attached to one of two flow path components to be joined, through which a fluid flows, and the other flow path component is formed as a tubular male member. Then, by inserting the male member into the inner hole of the female member and fitting the female member and the male member together, the one-touch joint structure that joins the two flow path constituent members is adopted. The insertion portion of the male member with respect to the female member, the outer diameter of the front portion in the insertion direction is smaller than the outer diameter of the rear portion in the insertion direction, the small diameter portion on the distal side, the large diameter on the base side. In order to form a stepped cylindrical shape, a first peripheral groove is provided in the small-diameter portion of the insertion portion, and the first peripheral groove has an outer diameter smaller than the inner diameter of the female member. When the engagement ring that can be elastically deformed in the radial direction A second peripheral groove is provided in a large diameter portion of the insertion portion, and protrudes from the outer peripheral surface of the large diameter portion into the second peripheral groove, and contacts the inner peripheral surface of the female member. Thus, while the annular sealing member for sealing the space between the male member and the female member in a fluid-tight manner is accommodated and arranged, while the male member is inserted and fitted to the female member,
In the inner peripheral surface portion of the female member where the small-diameter portion of the male member is located, a ridge extending in the circumferential direction is provided. Of the side surfaces on both sides in the axial direction of the ridge, in the insertion direction of the male member, At the rear side surface located on the rear side, when the male member is inserted, the engaging ring is pressed, elastically deformed in the radial direction, and pressed into the first circumferential groove to form a pressing surface to be housed. On the other hand, on the front side surface located on the front side in the insertion direction, an engagement surface that engages with a protruding portion of the engagement ring from the first peripheral groove is configured, A one-touch joint structure, wherein an annular gap is formed between the male member and the female member, the annular gap extending from the engagement surface of the ridge toward the one flow path component. 2. A tubular insertion portion which can be inserted into the gap formed between the male member and the female member, wherein the engagement ring is inserted into the insertion portion by being inserted into the gap. Can be disengaged radially inward and a release member provided with a pressing portion for pushing into the first peripheral groove can be used to release the engagement of the engagement ring with the engagement surface. The one-touch joint structure according to claim 1, wherein: 3. A projecting surface of the ridge provided on the female member, wherein a stepped surface for stepping the inserted portion into the large-diameter portion and the small-diameter portion is provided at an insertion portion of the male member with respect to the female member. It is formed in a shape corresponding to the pressing surface, and when the male member is inserted into the inner hole of the female member, by contacting the pressing surface of the female member, the male member with respect to the female member The one-touch joint structure according to claim 1, wherein the one-touch joint structure is a stopper surface that regulates an insertion position. 4. A structure having a connection hole for receiving a predetermined fluid through the connection hole, and a tubular shape, which is detachably inserted into the connection hole of the structure at an outer peripheral portion at one end in the axial direction. A piping device comprising: a female member to be fixed; and a male member inserted into the female member from the other end in the axial direction and fitted with one touch, wherein the female member of the male member is provided. The insertion part is designed so that the outer diameter of the front part in the insertion direction is smaller than the outer diameter of the rear part in the insertion direction, and the tip part has a small diameter part and the base part has a large diameter part. Then, a first circumferential groove is provided in the small diameter portion of the insertion portion, and a radially elastically deformable engagement having an outer diameter smaller than the inner diameter of the female member in the first circumferential groove. The ring is accommodated and arranged so that the diameter can be reduced, and the large diameter of the insertion site A second peripheral groove, and protrudes from the outer peripheral surface of the large-diameter portion into the second peripheral groove, and contacts the inner peripheral surface of the female member, whereby the male member and the female member While the annular sealing member that seals the space between them is fluid-tightly accommodated and arranged, while the male member is inserted and fitted to the female member,
In the inner peripheral surface portion of the female member where the small-diameter portion of the male member is located, a ridge extending in the circumferential direction is provided. Of the side surfaces on both sides in the axial direction of the ridge, in the insertion direction of the male member, At the rear side surface located on the rear side, when the male member is inserted, the engaging ring is pressed, elastically deformed in the radial direction, and pressed into the first circumferential groove to form a pressing surface to be housed. On the other hand, on the front side surface located on the front side in the insertion direction, an engagement surface that engages with a protruding portion of the engagement ring from the first peripheral groove is configured, A piping device, wherein an annular gap is formed between the male member and the female member, the annular gap extending from the engagement surface of the ridge toward the one flow path component. 5. A step of inserting the male member into the female member, wherein a step surface for stepping the insert part into the large diameter portion and the small diameter portion is provided on the female member. It is formed in a shape corresponding to the pressing surface, and when the male member is inserted into the inner hole of the female member, by contacting the pressing surface of the female member, the male member with respect to the female member The piping device according to claim 4, wherein the piping device is a stopper surface for regulating an insertion position. 6. A female screw is provided on an inner peripheral surface of a connection hole of the structure, and a male screw which can be screwed to the female screw is provided on an outer peripheral surface of the female member at one end in the axial direction. The female member is configured to be removably inserted and fixed in the connection hole of the structure by screwing the female screw and the male screw, and the female member and the structure in the fixed state are fixed to each other. An annular second seal member is provided between the opposing surfaces, the annular second seal member being in contact with the opposing surfaces of the female member and the structure to seal the space between the female member and the structure in a fluid-tight manner. The piping device according to claim 4 or 5. 7. An outer peripheral portion of the female member at the other end in the axial direction, a flange portion protruding radially outward is provided when the female member is inserted into a connection hole of the structure. The second sealing member according to claim 6, wherein the second seal member is provided so as to face an end face of the structure, and between the end face of the structure and the face of the flange portion facing the end face. Plumbing equipment.