JP2003113982A - Piping joint - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent dust, water or the like from intruding into an inside form a connecting part and allowing stable disconnection or connection even if a joint is left in an automobile for a long time. SOLUTION: This piping joint is provided with a male piping joint 10 including a joint 12 connecting a device, a valve element 13 (check valve), and a projection 25 (locking part); and a female piping joint 50 including a joint 52 connecting a device, a movable valve element 54 (check valve), and a leaf spring 53 to be locked with the projection 25 (spring member). The male piping joint 10 and the female piping joint 50 are connected by locking the leaf spring 53 on the projection 25, and each check valve 13, 54 is opened to communicate to an inside. A cylindrical boot 100 having an inner diameter same as an outer diameter in an open side of the female piping joint 50 is provided and a connected part of the male piping joint 10 having an outer diameter same as the inner diameter of the boot 100 is covered by the boot 100.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe joint used for parts such as a clutch, a brake device, an engine, a transmission coolant, a lubricant pipe, a power steering, an air conditioning hose, and an instrument pipe, and more particularly. The present invention relates to a pipe joint that can be connected and disconnected in a state where a fluid is sealed in these pipes in advance.

[0002]

2. Description of the Related Art As a conventional example, FIG.
00 shows a cross-sectional view. This conventional technique includes a female pipe joint 210 and a male pipe joint 220 inserted into the female pipe joint 210. The female pipe joint 210 has a pipe connection portion 211 to which the device is connected on one end side, and an open end 21 having a leaf spring 212 whose one end can expand its diameter on the other end side.
3 and includes a check valve 215 that is axially movable along the internal passage 214 and closes the internal passage 214 when the male pipe fitting 210 is not connected. As shown in FIG.
The perspective view of the leaf spring 212 is shown.

The male pipe joint 220 has a pipe connecting portion 221 to which the device is connected on one end side, and a shoulder portion 223 engaging with the leaf spring 212 of the female pipe joint 210 is provided on the other end side. In addition, the open end 222 is fitted into the open end 213 of the female pipe joint 210, and the female pipe joint 210 is provided inside.
Includes a check valve 224 that closes the line when not connected to.

This pipe joint 200 has a female pipe joint 21.
0 is inserted into the open end 213 of the male pipe joint 220 to expand the diameter of the leaf spring 212 of the female pipe joint 210, and then the shoulder portion 223 of the male pipe joint 220 is engaged. Since the stop valves 215 and 224 are released and the inside is communicated with each other to complete the connection, the joints 210 and 220 can be coupled, and the possibility that air is mixed into the piping is extremely reduced.

The pipe joint 200 is preferably used for simplifying the automobile assembly line and facilitating the maintenance of the automobile. That is, the hydraulic oil is sealed in advance in the clutch device, the master cylinder of the brake device and the clutch device, the brake device, etc. by utilizing the function of sealing the tip of the pipe joint 200 when the pipe joint 200 is separated. When the pipes are connected to each other with the pipe joint 200 after being mounted on the vehicle, the hydraulic oil is enclosed, so that the labor for supplying the hydraulic oil can be saved and the assembly line can be simplified.

In the case of automobile maintenance (vehicle inspection, etc.),
The connection of the pipe joint 200 is released, and the pipe joint 200 is disassembled into a female pipe joint 210 and a male pipe joint 220.
Each device connected to and can be inspected. When the inspection is completed, each device can be reassembled in the automobile and the pipe joint 200 can be connected.

[0007]

However, since the pipe joint 200 is not separated when it is connected in the automobile production line unless there is a need for failure or inspection of parts,
If the time of breakdown / inspection is the time of vehicle inspection, separation / connection is performed only once every two to three years.

Meanwhile, when exposed to a bad environment in which strong winds generated during running of the vehicle, dust mixed with the strong winds, water splashes generated on the tires during running in rainy weather, etc. directly act, the pipe joints 200 are coupled. Part (specifically, the outer circumference of the open end 222 of the male pipe joint 220 and the female pipe joint 21)
The dust and water generated during the running of the automobile enters the mounting portion of the leaf spring 212 from the gap (between the inner periphery of the 0 open end 213) and the leaf spring 212 is fixed, and the pipe joint 200 cannot be separated. I will end up.

In order to avoid such a situation, it is necessary to select a place where the pipe joint 200 is not exposed to dust, water, etc. generated while the automobile is running, and the place for installation is restricted. It will be.

The present invention has been made in view of the above problems, and prevents dust and water from entering from the connecting portion to the inside, and enables stable separation and connection even when installed in a vehicle for a long time. The purpose is to provide a pipe joint.

[0011]

In order to solve the above-mentioned problems, a pipe joint according to a first aspect of the present invention has a joint to which a device is connected on one end side, and a hook portion on the open side of the other end, There is a male pipe joint including a check valve that closes the pipeline when a female pipe joint described later is not connected to the inside, and a joint to which the device is connected on one end side, and the engaging portion on the open side of the other end. And a female pipe joint including a check valve for closing the pipe when the male pipe joint is not connected inside, and the male pipe joint is the female pipe joint. A pipe joint in which the spring member is connected by engaging with the engaging portion, each check valve is opened and the inside is in communication, and the outer diameter of the female pipe joint on the open side is Provide a boot with a cylindrical shape that has an inner diameter, and use the portion that has the inner diameter of the boot as the outer diameter. And the male pipe joint to, in which the connecting portion covered with the boot.

According to the above construction, since the connecting portion between the male pipe joint and the female pipe joint is covered with the boot, it is possible to prevent dust, water, etc. generated during traveling of the automobile from entering from the connecting portion. Since the spring member near the connection part will not stick, remove the boot, release the spring member engagement part, separate the pipe joint and rejoin even after it has been installed in the car for a long time. It is possible to simplify the maintenance and inspection of the equipment in the vehicle. Therefore, the pipe joint can be provided even in an environment where dust, water, etc. are severely applied while traveling, and the place where the pipe joint is installed inside the vehicle is not selected.

Further, the boot is provided with a screw portion on the outer circumference of the male pipe joint or the female pipe joint, and a screw portion which is screwed to the screw portion is provided on the inner circumference of the boot, and screwed by screwing. It is preferable. According to this, the boot can be reliably fixed to the connecting portion, and the pipe joint can be integrated.

Further, it is preferable to interpose an O-ring on the joint surface between the boot and the male pipe joint or the female pipe joint. According to this, it is possible to fill the gap between the joint surfaces, and reliably prevent dust, water, etc. generated during traveling of the automobile from entering from the connecting portion. Further, it is preferable to provide an O-ring between the boot and the male pipe joint and the female pipe joint. According to this, it is possible to close the gap between both ends of the boot, and it is possible to reliably prevent dust, water, etc. generated while the vehicle is running from entering from the connecting portion.

It is also possible that the boot is made of an elastic material such as rubber or synthetic resin, and the boot has an inner diameter smaller than the outer diameters of the male pipe joint and the female pipe joint. According to this, the connecting portion of the pipe joint can be tightly covered by a simple operation of unfolding the boot and inserting it into the connecting portion.

According to a second aspect of the present invention, in the pipe joint according to the first aspect, the male pipe joint has an outer diameter of the female pipe joint that is continuous with a portion where the female pipe joint is fitted. A large-diameter portion and a small-diameter portion having a smaller diameter than the large-diameter portion are provided to form a step portion, and an inner hole that fits into the step portion is provided on one end side of the boot and the other end. The side is screwed and screwed to the female pipe joint.

According to the above construction, one end of the boot is engaged with the male pipe joint and the other end is screwed into the female pipe joint for screw connection, so that the male pipe joint and the female pipe joint are integrated. Therefore, it is possible to prevent the male pipe joint and the female pipe joint from moving in different directions when the vibrations are applied to the pipe joint and causing damage to the leaf springs. . In this way, the pipe joint can withstand vibration while the automobile is running, so that the pipe joint can be provided even in the most adverse environment where vibration is severe, and the place where the pipe joint is installed inside the automobile is not selected.

Further, the gap between the boot and the female pipe joint serves as a threaded portion of the screw, and the gap between the boot and the male pipe joint can be eliminated by tightening the screw infinitely. It is possible to reliably prevent dust, water, etc., which may be generated while the vehicle is running, from entering from the connecting portion. Therefore, it can be installed anywhere inside the car, and pipe fittings can be installed even in the worst environment where dust, water, etc. act violently while driving, and wherever installed inside the car .

[0019]

DESCRIPTION OF THE PREFERRED EMBODIMENTS (Embodiment) A first embodiment of the present invention will be described with reference to FIGS. In a pipe joint 1 shown in FIG. 1, a male pipe joint 10 and a female pipe joint 50 are connected to each other, and the connecting portion is made of a metal boot 100.
Is covered with. A cross-sectional view of the male pipe joint 10 is shown in FIG.
FIG. 3 shows a sectional view of the female pipe joint 50.

The male pipe joint 10 includes a cylindrical body 11 and a cylindrical body 1.
A joint 1 to which a device is connected, which is screwed to one end side of
2 and the valve body 1 housed near the open side of the other end of the tubular body 11.
3 (check valve), a guide portion 14 that serves as a base of the valve body 13 and is slidably installed in the tubular body 11, the guide portion 14, and the joint 1.
A spring 15 that connects the two and urges the guide portion 14 to the open side.
Composed of and.

In FIG. 2, the cylinder 11 has a substantially cylindrical shape. One end side of the tubular body 11 is fitted with the joint 12 up to the middle and is stopped by a protrusion 20 provided on the outer periphery of the joint 12.
The other end is open. The outer circumference of the cylindrical body 11 has a joint 12
The medium diameter portion 21, the large diameter portion 22, and the small diameter portion 23 are formed from the side where the is attached. A small-diameter inner hole 24 is formed at the open end of the inner hole 19 of the cylindrical body 11.

A concave portion is provided in the middle diameter portion 21 of the outer circumference of the cylindrical body 11 and the O-ring 18 is accommodated therein. Near the open side of the small-diameter portion 23, a projection 25 (engaging portion), which is a tapered surface on the open side and a step on the opposite side, is provided, and a concave portion is provided on the open-side end portion. A ring 17 is housed. A release ring 16 having a thickness slightly larger than the step of the step portion of the protrusion 25 is disposed on the step portion between the large diameter portion 22 and the small diameter portion 23. The release ring 16 has a flange 16a having a diameter larger than that of the large diameter portion 22 and can slide along the small diameter portion 23 by gripping the portion.

The guide portion 14 is slidable in the inner hole 19 of the tubular body 11, is connected to the joint 12 by the spring 15, and is always urged toward the open side of the tubular body 11. Body 11
Since it has a portion with a larger diameter than the small diameter inner hole 24, it is stopped by the small diameter inner hole 24. In addition, the guide section 14
Has a plurality of through holes that allow the inside of the cylindrical body 11 to communicate with each other.

The valve body 13 is installed in the guide portion 14 and has a diameter substantially the same as that of the small diameter inner hole 24. When the guide portion 14 is stopped by the small-diameter portion 24, the valve body 13 is flush with the open end of the tubular body 11. A concave portion is provided on a surface of the valve body 13 that is in contact with the small-diameter inner hole 24 of the cylindrical body 11, and an O-ring 26 is accommodated therein.

When the female pipe joint 50 is not connected,
The valve body 13 is housed in the small-diameter inner hole 24 of the cylindrical body 11, and O-
The ring 26 fills a gap between the valve body 13 and the inner hole 12, and holds a liquid such as hydraulic fluid such as equipment and pipes connected to the joint 12. Further, the valve body 13 is a female pipe joint 50.
When it is connected to, the valve device (described later) of the female pipe joint 50 pushes it into the inner hole 12 of the cylindrical body 11 and removes it from the small-diameter inner hole 24. Then, a flow path is formed in the inner hole 12.

In FIG. 3, a female pipe joint 50 comprises a tubular body 51, a joint 52 screwed to one end of the tubular body 51, to which the device is connected, and an open side of the other end of the tubular body 51. A leaf spring (spring member) 53 installed, a movable valve body 54 (check valve) slidably installed in the tubular body 51, a valve rod 55 installed in the center of the tubular body 51, The disc 56 serving as the base of the valve rod 55, the movable valve body 54 and the disc 56 are connected to each other, and
4 and a spring 57 that urges 4 toward the open side.

The cylindrical body 51 has a substantially cylindrical shape. One end of the cylindrical body 51 is fitted with the joint 52 and is stopped by a protrusion 64 provided on the outer periphery of the joint 12, and the other end is open. A large-diameter inner hole 68 is provided on the side of the inner hole 58 of the tubular body 51 where the joint 52 is fitted, and a large-diameter inner hole 60 having a length capable of accommodating the leaf spring 53 on the open side. Are formed. Further, on the open side of the large diameter inner hole 60, the small diameter inner hole 7
5 are provided. The outer periphery of the cylinder 51 has a large-diameter inner hole 60.
A large-diameter portion 65 is formed along the above, and a small-diameter portion 66 is formed in other portions.

A concave portion is provided in the large diameter portion 65 on the outer periphery of the cylindrical body 51 to accommodate the O-ring 61, and a screw portion 67 is provided closer to the tip side than the O-ring 61.

The disk 56 is a large-diameter inner hole 6 on the inner circumference of the cylindrical body 51.
8, and the step portion of the large-diameter inner hole 68 of the inner hole 58,
It is sandwiched and fixed with the joint 52. The disk 56 is provided with a plurality of through holes 59.

The valve rod 55 is fixed at one end thereof by penetrating substantially the center of the disk 56, and has a length that does not reach the large-diameter inner hole 60 of the inner hole 58 of the cylindrical body 51. Cylindrical body 51 of valve rod 55
A substantially cylindrical valve body 69 having a large-diameter portion 70 is provided at the open end of the valve body 69. A recess is provided on the outer periphery of the valve body 69, and the O-ring 63 is accommodated therein.

The movable valve body 54 is slidable in the inner hole 58 of the cylindrical body 51 with the valve rod 55 passing through the center thereof. The outer diameter of the movable valve body 54 is substantially the same as the inner hole 58 of the cylindrical body 51, and the through hole 71 is substantially the same diameter as the valve body 69. Disk 56 and spring 5
The movable valve body 54 connected by 7 is always urged toward the open side of the cylinder body 51, but is stopped by the large-diameter portion 70 at the tip of the valve body 69. A concave portion is provided on the surface of the movable valve body 54 that contacts the inner hole 58 of the cylindrical body 51, and the O-ring 63 is accommodated therein.

When the male pipe joint 10 is not connected,
The movable valve body 54 is fitted with the valve body 69, and the O-ring 6
The gap between the valve body 69 and the through hole 71 is closed by 3 to hold a liquid such as hydraulic fluid such as equipment and piping connected to the joint 52. Further, the movable valve body 54 is the male pipe joint 1
When the 0 and the female pipe joint 50 are connected, the male pipe joint 10 is pushed into the inner hole 58 of the cylindrical body 51 by the small diameter portion 23 and is detached from the valve body 69. Then, a flow path is formed around the valve rod 55 to open the inner hole 58.

The leaf spring 53 is installed in the large-diameter inner hole 60 on the open side of the cylindrical body 51. The leaf spring 53 is shown in FIG.
FIG. 4 (A) shows a view of the cylinder from the open side of the cylinder 51.
The (A) AA 'cross section figure is shown. The leaf spring 53 has a cylindrical base portion 72 having a cut in a part thereof, and short leaf springs 73 and long leaf springs 74 inclined inward are alternately provided. Since the base portion 72 has a gap in a part thereof, it can be expanded or contracted in diameter by bending. The leaf spring 53 is configured such that the base portion 72 is on the open side of the tubular body 51 and the tubular body 5 is
The first large diameter portion is once reduced in diameter and accommodated, then returns to the original diameter inside the large diameter portion 60 and is hooked inside by the small diameter inner hole 75.

FIG. 5A shows a front view of the boot 100.
A sectional view is shown in FIG. The boot 100 is a cylindrical body 101 having a substantially cylindrical shape. One end side of the inner hole 104 of the cylindrical body 101 is a small diameter inner hole 103, and the other end side is a large diameter inner hole 106. The small-diameter inner hole 103 is the middle-diameter portion 2 of the male pipe joint 10.
1 and the inner hole 104 have substantially the same diameter as the large diameter portion 22, and the large diameter inner hole 106 has substantially the same diameter as the large diameter portion 65 of the female pipe joint 50.

On the large-diameter inner hole 106 side of the inner hole 104, a female screw 105 that is screwed into a screw portion 67 provided on the outer periphery of the female pipe joint 50 on the open side is provided. Further, the nut 107 is provided outside the small-diameter inner hole 103 of the boot 100.
Is provided, the entire boot 100 can be rotated, and the female screw 105 can be screwed into the screw portion 67 of the female pipe joint 50.

In the present embodiment, the boot 100 is made of metal such as stainless steel or aluminum, but it may be made of elastic material such as rubber or synthetic resin. When it is made of metal, it is necessary to manufacture the boot with high accuracy so as to reduce the gap between the boot and the male pipe joint and the female pipe joint.

When the male pipe joint 10 is inserted into the female pipe joint 50, the short leaf springs 73 of the leaf springs 53 are brought into contact with the protrusions 25.
Thus, the diameter is once expanded, and when it exceeds the protrusion 25, the shape is again inclined as before. As a result, the leaf spring 53 is hooked by the protrusion 25, and the male pipe joint 10 and the female pipe joint 50 are connected.

At this time, the valve body 13 of the male pipe joint 10
Is pushed into the tubular body 11 by the valve rod 55 of the female pipe joint 50. In addition, the movable valve body 54 of the female pipe joint 50
Is pushed into the tubular body 51 by the tubular body 11 of the male pipe joint 10. As a result, the internal self-seal of both sides is released, and the interiors communicate with each other.

The connection can be released by the release ring 16 attached to the male pipe joint 10. That is, the collar 16a is gripped, the release ring 16 is moved toward the female pipe joint 50, and the short spring 73 of the leaf spring 53 is pushed up to expand the diameter. Then, by separating the female pipe joint 50 from the male pipe joint 10 and releasing the engagement with the protrusion 25, the two can be separated.
Further, when the male pipe joint 10 and the female pipe joint 50 are separated from each other, the valve devices 13 and 54 are closed so that the joints 12 and 52 are respectively connected.
Fluid such as hydraulic oil is enclosed in the equipment connected via the.

With the male pipe joint 10 and the female pipe joint 50 connected, the nut 107 of the boot 100 is rotated,
The threaded portion 67 is screwed into the female screw 105 to form the medium diameter portion 21 and the large diameter portion 22 of the male pipe joint 10 and the female pipe joint 50.
The large diameter portion 65 and the boot 100 are covered. Also, boots 1
00, when the screw portion 67 and the female screw 105 are screwed together,
Shoulder 102 of boot 100 and middle diameter portion 2 of male pipe joint 10
1 and the step portion of the large diameter portion 22 are engaged with each other.

With this boot 100, the male pipe joint 1
0 and the female pipe joint 50 are integrally fastened, and the pipe joint 1
The structure can withstand the vibration applied to the. That is, since the male pipe joint 10 and the female pipe joint 50 are integrated, different vibrations are generated, the joints move in different directions, and the leaf spring or the like is damaged. There is no. At the same time, dust, water, etc. that are covered with the boot 100 and that act on the connecting portion of the pipe joint 1 are prevented from entering, thus ensuring the separating function of the pipe joint 1.

The female pipe joint 50 and the boot 100 are screwed to be screwed together, and the male pipe joint 10 is connected.
When the boot and the boot 100 are screwed by screwing, the pipe joint is integrally connected in a state closer to a rigid body, and can withstand more violent vibration.

An O-ring 18 is provided between the small diameter inner hole 103 of the boot 100 and the middle diameter portion 21 of the male pipe joint 10.
The O-ring 61 seals between the large diameter inner hole 106 and the large diameter portion 65 of the female pipe joint 50. As a result, both ends of the boot 100 are closed, and dust, water, and the like that act on the connecting portion of the pipe joint 1 are reliably prevented for a long period of time, so that the separating function of the pipe joint 1 is guaranteed.

The O-ring 18 and the O-ring 61 are
Male pipe joint 10, female pipe joint 50, and boot 100
It's not necessary if it is in close contact with
It is preferably used for surely ensuring an airtight state between the respective members. If the O-rings 18 and 61 are omitted, it is necessary to improve the processing accuracy of the inner circumference of the boot 100 and the outer circumferences of the male pipe joint 10 and the female pipe joint 50.

Boots 110, 120, and 130 are shown below as modified examples of the boot 100. (Modification 1) A sectional view of the boot 110 is shown in FIG. The boot 110 is a cylindrical body 111 having a substantially cylindrical shape.
The female pipe side of the inner hole 114 of No. 1 is a large diameter inner hole 116.
The inner hole 114 has substantially the same diameter as the large-diameter portion 22, and the large-diameter inner hole 11
6 has a diameter substantially the same as the large diameter portion 65 of the female pipe joint 50.

On the large-diameter inner hole 116 side of the inner hole 114, there is provided a female screw 115 which is screwed into a threaded portion 67 provided on the outer periphery of the female pipe joint 50 on the open side. A flat portion 1 into which a wrench is inserted is provided at the center of the outer periphery of the body 111.
17 is provided and a wrench is applied to the flat portion 117 to rotate the boot 110, and the female screw 115 can be screwed into the screw portion 67 of the female pipe joint 50. Also,
In the case of this modification, the O-ring 18 is the male pipe joint 1
It is provided in the large diameter portion 22 of 0 and seals between the large diameter portion 22 and the inner hole 114.

The boot 110 has a simpler structure than the boot 100, and can be an integrated pipe joint that does not allow dust, water, and the like to enter.

(Modification 2) A sectional view of the boot 120 is shown in FIG.
FIG. 7 shows the pipe joint 2 using the boot 120 in FIG.
Shown in (a). The boot 120 is made of an elastic material such as synthetic rubber or synthetic resin. The boot 120 is a tubular body 121 having a substantially cylindrical shape, and the male pipe side 10 of the inner hole 124 of the tubular body 121 forms a protrusion 125. Inner hole 124
Is the large diameter portion 22 of the male pipe joint 10 and the female pipe joint 50.
Has a diameter slightly smaller than the large-diameter portion 65. When the boot 120 is used, the large diameter portion 2 of the male pipe joint 10 is used.
2, the groove portion 81 into which the protrusion 125 is fitted is provided, and the large diameter portion 65 of the female pipe joint 50 is not provided with the O-ring 61 and the screw portion 67.

Since the boot 120 is made of an elastic material, it has a simple structure and can be operated by inserting the male pipe joint 10 and the female pipe joint 50 which are spread and connected to each other. Can be closely attached to the outer periphery of the.

(Modification 3) A sectional view of the boot 130 is shown in FIG.
Shown in. The boot 130 is made of an elastic material such as synthetic rubber or synthetic resin. The boot 130 is a substantially cylindrical tubular body 131, and protrusions 135 and 136 are formed at both ends of an inner hole 134 of the tubular body 131. The inner hole 134 has a diameter slightly smaller than the large diameter portion 22 of the male pipe joint 10 and the large diameter portion 65 of the female pipe joint 50. When the boot 130 is used, the large diameter portion 22 of the male pipe joint 10 is provided with a groove portion into which the protrusion 136 is fitted, and the female pipe joint 50 is provided.
The large diameter portion 65 is provided with a groove portion into which the protrusion 135 is fitted.

Since the boot 130 is made of an elastic material, it has a simple structure and can be easily operated by inserting the male pipe joint 10 and the female pipe joint 50 which are spread and connected. It can be fitted to the outer circumference of and closely attached.

The pipe joint according to the present invention is not limited to the above-described embodiments and modifications, and covers the connecting portion between the male pipe joint and the female pipe joint to prevent dust, sand, etc. from entering. What is necessary is just to prevent it and to integrate it.
For example, a tape having a narrow width may be wound around the connecting portion between the male pipe joint and the female pipe joint in multiple layers.

[0053]

According to the first aspect of the present invention, since the connecting portion between the male pipe joint and the female pipe joint is covered with the boot, dust, water, etc. generated during traveling of the automobile are prevented from entering from the connecting portion. Since the spring member near the connection part will not stick, the boot will be removed, the engagement part of the spring member will be released, and the pipe joint will be separated even after being installed in the vehicle for a long time. It is possible to rejoin, and the maintenance and inspection of the equipment in the vehicle can be simplified. for that reason,
No matter where it is installed inside the car, dust and
The pipe joint can be installed in the environment where water or the like acts violently, and the place where it is installed inside the car is not selected.

According to the second aspect of the present invention, one end of the boot is engaged with the male pipe joint and the other end is screwed with the female pipe joint for screw connection, so that the male pipe joint and the female pipe joint are formed. To prevent damage to the leaf spring due to movement of the male and female pipe joints in different directions when the pipe joints are integrated and become almost rigid and vibration is applied to the pipe joints. You can In this way, the pipe joint can withstand vibration while the automobile is running, so that the pipe joint can be provided even in the most adverse environment where vibration is severe, and the place where the pipe joint is installed inside the automobile is not selected.

Further, the gap between the boot and the female pipe joint serves as a screwing portion of the screw, and the gap between the boot and the male pipe joint can be eliminated by tightening the screw infinitely. It is possible to reliably prevent dust, water, etc., which may be generated while the vehicle is running, from entering from the connecting portion. Therefore, it can be installed anywhere inside the car, and pipe fittings can be installed even in the worst environment where dust, water, etc. act violently while driving, and wherever installed inside the car .

[Brief description of drawings]

FIG. 1 is a sectional view of a pipe joint 1 in which a male pipe joint 10 and a female pipe joint 50 are connected.

FIG. 2 is a cross-sectional view of the male pipe joint 10.

FIG. 3 is a sectional view of a female pipe joint 50.

FIG. 4 is a front view and a sectional view of a leaf spring 53.

5 is a front view and a cross-sectional view of boot 100. FIG.

FIG. 6 is a cross-sectional view of the boot 110.

7 is a sectional view of a boot 120 and a sectional view of a pipe joint 2. FIG.

FIG. 8 is a sectional view of the boot 130.

9 is a cross-sectional view of the pipe joint 200. FIG.

[Explanation of symbols]

1 Pipe fitting 10 Male pipe fitting 11 cylinder 12 joints 13 valve body (check valve) 14 Information 15 spring 16 release ring 18 O-ring 19 inner hole 20 protrusions 24 Small diameter inner hole 25 Protrusion (engagement part) 50 female pipe fittings 51 cylinder 52 joint 53 Leaf spring (spring member) 54 Movable valve body (check valve) 55 valve rod 56 disc 57 spring 58 inner hole 59 through hole 60 large diameter inner hole 61 O-ring 67 screw part

Claims (2)

[Claims] 1. A joint to which a device is connected is provided at one end side,
A male pipe joint including a check valve that is provided on the open side of the other end and that closes the pipeline when a female pipe joint described later is not connected to the inside, and a joint to which the device is connected on one end side. There is a spring member that engages with the engaging portion on the open side of the other end, and a female pipe joint including a check valve that closes the pipe when the male pipe joint is not connected to the inside, and The male pipe joint is fitted in the female pipe joint, the spring member is connected by being engaged with the engagement portion, each of the check valves is opened, the interior of the pipe joint, wherein, A cylindrical boot having an outer diameter on the open side of the female pipe joint as an inner diameter is provided, and the male pipe joint has a portion having an inner diameter of the boot as an outer diameter, and the connected portion is covered with the boot. Plumbed fittings. 2. A large diameter portion having an outer diameter of the female piping joint and a diameter smaller than the large diameter portion, which is continuous with a portion where the female piping joint is fitted into the male piping joint. And a small diameter portion are provided to form a stepped portion, an inner hole that fits into the stepped portion is provided at one end side of the boot, and the other end side is screwed and screwed to the female pipe joint. The pipe joint according to claim 1.