JPH029158Y2 - - 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, there was a problem in that the flow rate did not reach the flow rate passing through the overflow prevention valve and 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 an L-shaped Kotoku main body, 2 is a closure that is assembled into the main body 1, is attached to a rotating body 4 rotated by a handle 3, and has a coil spring 5.
is compressed between the rotating body 4 and the closure 2, and the closure 2 is connected to the main body 1.
It is designed to come into close contact with the inner tapered surface 6.
A shaped opening hole 7 is bored in the closure 2, 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 1 of the valve operating member 10 is located between the lower surface of the valve operating member 10 and the lower surface of the valve operating member 10.
3 to intervene. A pair of window-like inclined cam surfaces 14, 14' are formed on the circumferential surface of the valve operating member 10, and a pin 15 consisting of a screw 15' and a female screw 15'' is inserted into the tubular body 8. , 14' and the vertical groove holes 17 of the two leg pieces 9a that support the overflow prevention valve 16 installed upright on the auxiliary valve 9.Then, the valve body 9
A packing 18 is attached to b, and the push-up spring 19 is connected to the inner recess 20 of the main body 1 and the recess 21 of the auxiliary valve 9 so that the packing 18 comes into pressure contact with the lower surface of the tubular body 8.
Insert in between. The auxiliary valve 9 engages with a pair of notches 22 formed by cutting off the lower edge of the valve operating member 10, and protrusions 24, 24' that fit into the cutout steps 23 of the notches 22.
The locking piece 11 of the valve operating member 10 is integrally projected.
11' fits into vertical grooves 25, 25' 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 have vertical grooves 25,
When the valve operating member 10 is rotated to the position 25', the valve operating member 10 is lowered together with the auxiliary valve 9 by the action of the push-down spring 13, and is in the open state shown in FIG. That is, the auxiliary valve 9 is closed during the rotation of the closing member 2, and the auxiliary valve 9 is opened when the closing member is fully open.
As shown in the figure, the protrusions 24, 24' of the auxiliary valve 9 are engaged with the recessed step portion 23 of the valve operating member 10, so that they are stable in the open position. Then, when the closing member 2 is slightly rotated in the closing direction, the auxiliary valve 9 is also rotated, and the protrusions 24, 24' are moved to the valve operating member 10 as shown in FIG.
As shown in FIG. 3, the auxiliary valve 9 is removed from the cutout stepped portion 23 and raised by the action of the push-up spring 18, as shown in FIG. Thereafter, when the closing member 2 is further rotated, the pin 15 comes into pressure contact with the inclined cam surfaces 14, 14' of the valve operating member 10, thereby raising the valve operating member 10 and returning it 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 25, 25' in the Kotoku main body 1, so it cannot be rotated, so the inclined cam surface 14,
14', 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 malfunctioning, and it is particularly suitable for a kettle with an L-shaped main body, making it safe for this type of gas kettle. The level increases even more.

[Brief explanation of the drawing]

The drawings show an embodiment of the gas kettle according to the present invention, and 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 longitudinal sectional front view of a position where the closure is slightly turned from the open state to the closed side.
Figure 4 is a vertical side view of only the main body of Kotsuku, Figure 5 is an exploded perspective view, Figure 6 is a cross-sectional view taken along the line of Figure 1, Figure 7 is a cross-sectional view taken along the line of Figure 2, and Figure 8 is a cross-sectional view taken along the line of Figure 4. Fig. 9 is a cross-sectional view along the line shown in Fig. 1,
FIG. 10 is a sectional view taken along the line of FIG. 2, and FIG. 11 is a sectional view taken along the line of FIG. 3. DESCRIPTION OF SYMBOLS 1... Kotoku body, 2... Closure, 7... Shaped opening hole, 8... Tubular body, 9... Auxiliary valve, 9a... Leg piece, 9b... Valve body, 10... Valve operating member, 11,
11'...Locking piece, 12...Small diameter stepped portion, 13...
Push-down spring, 14, 14'... Inclined cam surface, 15
... Pin, 16 ... Excess flow prevention valve, 19 ... Push-up spring, 22 ... Notch, 24, 24' ... Protrusion, 2
5, 25'... vertical groove.

Claims (1)

[Scope of utility model registration request] A valve operating member with an auxiliary valve inside is suspended in a vertically movable manner below the hook-shaped opening hole of the closure made in the L-shaped Kotuku body, and the valve operating member is latched to the stepped portion of the Kotuku body in the raised position. , a locking piece protruding from the upper end that enters the vertical groove under the stepped portion when lowered, and a window-like inclined cam surface that acts on the pin extending over the tubular portion of the lower end of the closure is formed on the circumferential surface; The auxiliary valve, which is in contact with the lower edge of the tubular body by a push-up spring that stands up from the inner surface of the L-shaped main body, has a leg piece that supports the overflow prevention valve, and a protrusion that engages with a lower end notch of the valve operating member on which a push-down spring is applied. and the leg piece has a vertical slot through which the pin is supported.