JP2574000Y2 - Check valve with built-in hose - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a check valve with a built-in hose.

[0002]

2. Description of the Related Art A check valve with a built-in hose is mounted in a vacuum hose or the like that connects a negative pressure booster of an automobile to a negative pressure source of an engine.

[0003] The valve housing of such a check valve is
A cylindrical housing body having an inlet port at one end and an opening at the other end; and an outlet port, which is fitted into the opening of the housing body to define a valve chamber between the housing body. And a cap.

In the valve housing, an annular groove is formed on an outer peripheral surface of a portion of the cap that fits into the housing main body, and an annular projection is formed on an inner peripheral surface of an opening of the housing main body. The housing main body and the cap are locked to each other by being fitted to the housing.

[0005]

In the valve housing, the cap is inserted into the housing body such that the annular projection is forcibly expanded at the edge of the cap, and the annular groove is engaged with the annular projection. Let me.

Accordingly, in the above valve housing,
In order to ensure the engagement between the cap and the housing body,
If the projection of the housing body is raised, it becomes difficult to insert the cap into the housing body.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a hose built-in check valve which facilitates engagement between a cap and a housing body and ensures the engagement.

[0008]

According to the present invention, a cylindrical housing body having an inlet port at one end and an opening at the other end, and an outlet port are fitted into the opening of the housing body. In a check valve with a built-in hose, wherein a valve housing is constituted by a cap defining a valve chamber between the housing body and the cap, the open end of the housing body can be bent in a radial direction of the housing body.
Between the inner peripheral surface and the outer peripheral surface of the tongue piece.
A convex portion is formed at the same position, a concave portion is formed on a peripheral surface of a portion of the cap that fits into the housing main body, and an inner peripheral surface side convex portion of the tongue piece is fitted into the concave portion. The housing body and the cap are engaged with each other, and when the valve housing is inserted into the hose, the outer peripheral surface side convex portion of the tongue piece is pressed against the inner peripheral surface of the hose.

[0009]

In the check valve with built-in hose according to the present invention, when the cap is fitted into the housing body, the tongue piece is housed.
The cap body is bent in the radial direction, and the insertion resistance of the cap is reduced. Further, when the valve housing is loaded in the hose, the outer peripheral surface side convex portion of the tongue piece is pressed toward the cap by the elastic force of the hose, and the inner peripheral surface side convex portion of the tongue piece and the cap are closed. Is securely engaged with the recess.

[0010]

1 to 4 show a hose built-in check valve according to the present invention.

The valve housing 2 of the check valve 1 has a cylindrical synthetic resin housing body 4 having a partition wall 3 at one end, and a columnar synthetic resin inserted into an opening 5 at the other end of the housing body 4. And the cap 6.

The housing body 4 has an inlet port 7 at the axis of the partition wall 3, and a valve seat 8 is formed at an opening edge of the inlet port 7. In addition, an end peripheral wall that defines the opening 5 of the housing body 4 has:
Housing body defined by two slits 9, 9
Four radially bendable tongue pieces 10 are equally arranged at three locations in the circumferential direction . As shown in FIGS. 2 to 4, a housing is provided on the inner peripheral surface and the outer peripheral surface of these tongue pieces 10 .
Protrusions 11 and 12 are formed at substantially the same positions in the circumferential direction and the axial direction of the main body 4, respectively.

On the other hand, a guide hole 13 is formed in the axis of the cap 6, and an outlet port 14 is provided around the hole 13. An annular projection 15 having an outer diameter larger than the outer diameter of the housing body 4 is formed on the outer periphery of one end of the cap 6. Further, the other end of the cap 6 is connected to the housing body 4.
Has an outer diameter smaller than the inner diameter of the opening,
An annular recess 16 is formed.

The housing body 4 and the cap 6 are connected to the other end of the cap 6 by the opening 5 of the housing body 4.
Are locked together. When the other end of the cap 6 is inserted into the opening 5 of the housing body 4, the edge of the cap 6 is
2, the tongue piece 10 is pushed outward through the convex portion 11 as shown in FIG. Therefore, the other end of the cap 6 can be relatively easily inserted into the housing body 4. When the other end of the cap 6 is sufficiently inserted into the housing main body 4, as shown in FIG. 3, the convex portion 11 of the housing main body 4 engages with the concave portion 16 of the cap 6, and the housing main body 4 And the cap 6 are locked together.

The valve housing 2 connected in this manner is provided between the housing body 4 and the cap 6 in the valve chamber 1.
7 is defined. The valve body 18 is accommodated in the valve chamber 17.

The valve element 18 has a spring retainer 19 at an intermediate portion. A stem 20 is formed at one end of the retainer 19, and a bulging portion 21 is formed at the other end of the retainer 19. A valve main part 22 made of an elastic material is fitted between the retainer 19 and the bulging part 21.

The valve body 18 has its stem 20 inserted into the guide hole 13 and is urged in the direction of the partition wall 3 of the housing body 4 by a spring 23 disposed between the retainer 19 and the end face of the cap 6. Is done. Then, the valve body main portion 22 is brought into pressure contact with the valve seat 8 of the housing body 4 to shut off the space between the inlet port 7 and the outlet port 14.

The check valve 1 thus assembled is
As shown in FIG. In the housing body 4 of the check valve 1 mounted in the hose A, the convex portion 12 of the tongue piece 10 bites into the inner peripheral surface of the hose A,
The convex portion 11 of the tongue piece 10 is maintained at a predetermined position of the hose A, and
It is pushed in and makes the connection with the cap 6 stronger.
In addition, the cap 6 of the check valve 1 is also maintained at a predetermined position of the hose A with the annular projection 15 biting into the inner peripheral surface of the hose A. Therefore, the check valve 1 is securely held at a predetermined position of the hose A, and the housing body 4 and the cap 6 are firmly connected to each other.

In the embodiment shown in FIG. 1, a projection 12 'is also formed on the peripheral part of the end defining the opening 5 of the housing body 4, except for the tongue piece 10. These convex portions 1
2 ′ is effective to cut into the inner peripheral surface of the hose A to hold the housing body 4 at a predetermined position of the hose A. For example, the convex portion 12 'is not always necessary. In that case, there may be no end peripheral wall portion on which the projections 12 'are formed.

Conversely, the slits 9 may be formed on the end peripheral wall at a considerable number of intervals, and the tongue pieces 10 may be formed by the slits 9 over the entire periphery of the end peripheral wall.

[0021]

As described above, in the check valve with a built-in hose according to the present invention, the tongue is bent and the insertion resistance of the cap is weakened in the work of assembling the valve housing. Easy to insert into Therefore, the height of the convex portion of the tongue piece and the depth of the concave portion of the cap can be made sufficiently large, and sufficient coupling can be performed.

Further, when the valve housing is loaded in the hose, the outer peripheral surface side convex portion of the tongue piece is pressed toward the cap by the elastic force of the hose. Therefore, the inner peripheral surface side convex portion of the tongue piece is sufficiently fitted into the concave portion of the cap to ensure the engagement between the housing body and the cap.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing a check valve with a built-in hose according to the present invention.

FIG. 2 is a cross-sectional view showing a state in which the housing body and the cap of the hose built-in check valve according to the present invention are connected to each other.

FIG. 3 is a cross-sectional view showing a state in which the housing body and the cap of the check valve with a built-in hose according to the present invention are connected to each other.

FIG. 4 is a cross-sectional view showing a state in which the hose built-in check valve according to the present invention is loaded in the hose.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Check valve 2 Valve housing 3 Partition wall 4 Housing main body 5 Opening 6 Cap 7 Inlet port 8 Valve seat 9 Slit 10 Tongue piece 11 Inner peripheral side convex part 12 Outer peripheral side convex part 14 Outlet port 15 Annular projection 16 Concave part 17 Valve Chamber 18 Valve body 22 Valve body main part 23 Spring A Hose

Claims (1)

(57) [Scope of request for utility model registration] 1. A cylindrical housing body having an inlet port at one end and an opening at the other end, and an outlet port. The valve is inserted into an opening of the housing body, and a valve is provided between the housing body and the housing body. in the hose built-check valve that constitutes the valve housing by a cap defining a chamber, the housing is in the open end of the housing body
A portion defining a tongue that can be bent in the radial direction of the main body , and forming protrusions at substantially the same positions on the inner peripheral surface and the outer peripheral surface of the tongue, and fitting the cap into the housing main body; A concave portion is formed on the peripheral surface of the tongue, and the inner peripheral surface side convex portion of the tongue piece is fitted into the concave portion to lock the housing main body and the cap together, and insert the valve housing into a hose. A check valve with a built-in hose, wherein the outer peripheral surface side convex portion of the tongue piece is pressed against the inner peripheral surface of the hose when the tongue piece is set.