JPS636539Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a gas tank with an overflow prevention valve, and particularly to a gas tank with an overflow prevention valve of a type in which the overflow prevention valve is built into the closure.

This kind of gaskottoku was already in production in 1978.
This is disclosed in Japanese Patent No. 7969, and the outlet of the passage hole 2 in the closure 1 is used as the valve seat opening 3 of the overflow prevention valve, and on the other hand, it is fixed on the upstream side of the closure of the Kotuku main body 4. and a cylindrical body 5 protruding into the passage hole 2.
A notch 6 corresponding to the valve seat opening is provided at the upper end, and one side of the notch coincides with the valve seat opening 3 when the closure 1 is in the fully closed position. A ball valve 7 is accommodated and supported in the body 5 in a free state.

In the conventional device mentioned above, when the closing member 1 is in the fully open position,
The valve seat opening 3 and the notch 6 at the upper end of the cylinder 5 face each other, and in an overflow state, the ball valve 7 rises up the cylinder 5 and fits into the valve seat opening 3 from the notch 6. do.

After that, when the closure 1 is rotated to the fully closed position, the valve seat opening 3 aligns with one side 9 of the notch 6, so the ball valve 7 that was fitted into the valve seat opening 3 is moved to the notch. It hits one side and is forced to fall. That is, the ball valve 7 is reset to its initial state.

In the above-mentioned conventional device, the protrusion 8 is provided on the inner wall of the cylindrical body 5.
8 are provided alternately, and the ball valve 3 collides with these protrusions during the upward movement process to decelerate the ball valve 7, thereby delaying the operation of the ball valve 7.

Therefore, it is troublesome to manufacture a cylindrical body as a ball valve housing member having a delayed activation function. That is, processing of the notch 6, planting of the protrusion 8, etc. are required.

In order to simplify a ball valve housing member having a delay actuation function and a reset function, an object of the present invention is to enable a ball valve housing member having these functions to be formed only by spring processing.

The technical means of the present invention to solve the above problem is to configure the ball valve housing part with a coil spring, and make the lower end of the coil spring protrude in the radial direction, and directly or indirectly fit and fix it to the fixed part of the Kotuku main body. On the other hand,
The upper end of the coil spring is set so as to face the valve seat opening 3 of the closure when the closure is fully closed.

According to the above technical means of the present invention, the following effects can be obtained.

Since the ball valve accommodating portion is composed of a coil spring, when the ball valve is operated, the ball valve rises while colliding with each strand of the coil spring.
The ball valve will operate with a delay.

In the overflow state, the upper end of the coil spring's wire is out of the valve seat opening, so the ball valve fits into the valve seat opening from the upper end opening of the coil spring, rotating the closure to the fully closed position. Then, near this fully closed position, the ball valve comes into contact with the upper end of the wire of the coil spring and is lowered. That is, the ball valve is reset.

As mentioned above, according to the above-mentioned technical means of the present invention, the delayed operation and reset are performed as mentioned above, but the coil spring that serves as the ball valve accommodating part for this purpose has a shape and structure consisting only of ordinary spring processing. Because of this, its production and structure can be simplified.

Hereinafter, details of embodiments of the present invention will be explained based on the drawings.

In the first embodiment shown in FIGS. 2 and 3, the lower end 12 of a coil spring 11 is fitted into an annular screw 10 that is screwed into the main body 4. In this case, the lower end 12 has a radius of It is bent inward in the direction, and its tip 13 is fitted into a through hole 14 passed through the annular screw 10 in the radial direction, and both ends are assembled in a fixed state. The assembled body may be screwed into the screw hole 15 in a predetermined position.

Next, in the second embodiment shown in FIG. 4, the upper end 16 of the coil spring 11 is bent in the axial direction of the spring, and in this case, the ball valve 7 is bent at the time of reset.
There is no fear that the ball valve 7 will be damaged even if the upper end 16 comes into contact with the ball valve 7.

In the third embodiment shown in FIG. 5, the lower end 12 of the coil spring 11 is made to protrude outward in the radial direction, and a notch groove 18 is formed in the opening 17 formed below the closure 1 of the main body 4. In addition, a collar 19 is formed at the lower end of the notched groove 18, and the coil spring 11 is press-fitted from above so that the lower end 12 of the collar 19 fits into the notched groove 18. The vicinity of the bending point 20 of the lower end 12 is made to protrude inward of the coil spring 11 as shown in FIG. 6 by the press-fitting, and the ball valve 7 is supported in a free state at this portion. In this case, the annular screw 10 as in the previously described embodiments is not necessary, and the upper end 16
The positional relationship between the valve seat port 3 and the valve seat port 3 is always accurate, and no adjustment is required.

It goes without saying that in any of the above embodiments, the inner diameter of the coil spring is set slightly larger than the diameter of the ball valve 7.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of the conventional example, A is an open state, B is a closed state, and Figs. 2 and 3 are diagrams of the first example of the present invention.
FIG. 4 is an explanatory diagram of the fully open or fully closed state of the embodiment.
A perspective view of the coil spring of the second embodiment, FIG.
An explanatory diagram of the embodiment, FIG. 6 is a cross-sectional view taken along line XX,
In the diagram 1... Closing member, 2... Passing hole, 3... Valve seat opening, 4
... Kotoku body, 7 ... Ball valve, 11 ... Coil spring, 12 ... Lower end, 16 ... Upper end.

Claims (1)

[Scope of utility model registration request] A valve seat opening is provided in the passage hole in the closure, and a ball valve accommodating portion as a reset member is provided in the passage hole at the same time, and the ball valve accommodating portion is composed of a coil spring. The lower end protrudes in the radial direction and is directly or indirectly fitted and fixed to the fixed part of the Kotoku main body, while the upper end of the coil spring is set so as to face the valve seat opening of the closure when the closure is fully closed. Gas tank with overflow prevention valve.