JPS6131250Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a gas tank, and is a so-called overflow prevention valve that automatically shuts off the flow path when gas overflows beyond a certain flow rate due to an unexpected accident such as a rubber hose coming off. This relates to a gas tank equipped with.

Conventionally, this type of gas tank has an overflow prevention valve built into the rotating closure type gas tank, so if the closure is placed in a half-open state, the rubber hose comes off, etc., and an overflow situation occurs. However, the flow rate passing through the overflow prevention valve did not reach the operating flow rate, resulting in the inconvenience that the overflow prevention valve did not operate, which was very dangerous.

This invention solves the drawbacks of the conventional gas tank equipped with an overflow prevention valve as described above, and only in the fully open position,
The gas flow is configured so that the flow path is closed at other positions to prevent the overflow prevention valve from operating.

Embodiments of the gas tank according to the present invention will be described below with reference to the drawings. In the figure, 1 is the Kotuku body, 2
is assembled into the main body 1 as a closure, attached to the rotating body 4 rotated by the handle 3, a coil spring 5 is compressed between the rotating body 4 and the closure 2, and the closure 2 is inserted into the main body 1. It is adapted to come into close contact with the tapered surface 6 of. closed child 2
A square-shaped opening 7 is bored in the hole 7, and a tubular body 8 is integrally suspended from the lower surface thereof. The valve operating member 10 containing the auxiliary valve 9 is loosely inserted into the outside of the tubular body 8, and the locking pieces 11, 11' at the upper end thereof are locked to the small diameter stepped portion 12 formed inside the main body 1 to close the valve. A push-down spring 13 of the valve operating member 10 is interposed between the lower surface of the valve operating member 2 and the valve operating member 10. Further, a pair of window-shaped inclined cam surfaces 14, 14' are formed on the circumferential surface of the valve operating member 10, and the tubular body 8
A pen 15 consisting of a screw 15' and a female thread 15'' is inserted into the inclined cam surfaces 14, 14'. A packing 17 is attached to the valve body 9b, and a push-up spring 18 is inserted between the bottom surface of the valve operating member 10 and the recessed hole 9e of the auxiliary valve 9 so that the packing 17 comes into pressure contact with the bottom surface of the tubular body 8. Furthermore, the auxiliary valve 9 has a rectangular guide portion 9c that fits into the cocoon-shaped hole 19 of the valve operating member 10, and protrusions 9d are provided on both sides of the guide portion 9c. 1
1' is adapted to fit into vertical grooves 20, 20' formed in the small diameter stepped portion 12 when the closure 2 is in the open state.

Next, the operating state will be explained. When the closing member 2 is changed from the closed state shown in FIG. 1 to the open state shown in FIG. The left and right locking pieces 11, 11' of the member 10 are connected to the vertical grooves 20,
When the valve operating member 10 is rotated to the position 20', the valve operating member 10 is lowered together with the auxiliary valve 9 by the action of the push-down spring 13, and enters the open state shown in FIG. That is, the auxiliary valve 9 is closed while the closing member 2 is rotating, and the auxiliary valve 9 is opened when the closing member is fully open. 10 in the fully open position shown in Figure 2.
As shown in the figure, the protrusions 9d, 9d of the auxiliary valve 9 are locked to the valve operating member 10, so that they are stable in the open position. When the closing member 2 is slightly rotated in the closing direction, the auxiliary valve 9 also rotates, and the protrusion 9d is removed from the valve operating member 10 as shown in FIG. 11 due to the action of the push-up spring 18 as shown in FIG. In this way, the auxiliary valve 9 rises and comes into close contact with the closing tubular body 8, and the auxiliary valve is closed. After that, when the closing member 2 is further turned, the pin 15 is moved to the valve operating member 10.
The valve operating member 10 is brought into pressure contact with the inclined cam surfaces 14, 14' of the valve operating member 10, and is returned to the state shown in FIG.

At this time, the left and right locking pieces 11 of the valve operating member 10,
11' is engaged with the vertical grooves 20, 20' of the Kotoku main body 1, so it cannot be rotated, so the inclined cam surfaces 14, 1
4', and when the locking pieces 11, 11' rise to the upper side of the vertical groove, they rotate and reach the position shown in FIG. 1, where they lock onto the small diameter stepped portion 12.

According to the present invention, since gas does not flow in any position other than the fully open position of the closure, it is possible to prevent the overflow prevention valve from operating, further increasing the safety of this type of gas tank.

[Brief explanation of the drawing]

The drawings show an embodiment of the gas kettle according to the present invention, in which Fig. 1 is a longitudinal sectional front view showing the closed state of the closure, and Fig. 2 is a longitudinal sectional front view showing the closed state of the closure. Figure 3 is a partial vertical front view of the closure in the position where it is slightly turned from the open state to the closed side, Figure 4 is a vertical side view of only the Kotsuk body, Figure 5 is an exploded perspective view, and Figure 6 is Figure 1 - Line sectional view, 7th
The figure is Fig. 2 - Line sectional view, Fig. 8 is Fig. 4 -
9 is a sectional view taken along lines from FIG. 1, FIG. 10 is a sectional view taken from FIG. 2, and FIG.
It is a figure-line sectional view. DESCRIPTION OF SYMBOLS 1... Kotuku main body, 2... Closing element, 7... Square opening hole, 8... Tubular body, 9... Auxiliary valve, 10... Valve operating member, 11, 11'... Locking piece, 12 ...Small diameter step, push-down spring, 14, 14'... Inclined cam surface, 15... Pin, 16... Excess flow prevention valve, 18...
... Push-up spring, 19 ... Cocoon-shaped hole, 20, 20'
...Vertical groove.

Claims (1)

[Scope of utility model registration request] A valve operating member with an auxiliary valve inside is hung from the bottom of the hook-shaped opening hole of the closure on the main body of the Kotuku so that it can move up and down.
The valve operating member is provided with a locking piece at the upper end that locks onto the stepped portion of the lock main body in the raised position and enters the vertical groove under the stepped portion when lowered, and also has a locking piece on the circumferential surface that extends over the tubular portion at the lower end of the closure. The auxiliary valve is formed with a window-like inclined cam surface that acts on the pin, and is in contact with the lower end of the tubular shape by a push-up spring. A gas kettle characterized by having a rectangular guide portion that enters a cocoon-shaped hole.