JPH0211669Y2 - - Google Patents

Description

[Detailed explanation of the invention] [Industrial application field] The present invention is a so-called
This relates to an ON-OFF type gas tank and prevents the risk of the gas flow path being left half-open.

[Prior art and its problems]

There is an ON-OFF type gas tank that opens and closes the gas flow path instantaneously when the closing member of the gas tank is rotated and the closing member is about to fully open.

This type of gas tank includes, for example, those shown in FIGS. 5 and 6, and is constructed as described below.

As shown in FIG. 6, the flow path opening/closing mechanism is composed of a combination of a closure 3, a lift valve 2, and a cylinder 1, and an inverted L-shaped gas passage hole 3 formed in the closure 3.
The lift valve 2 and the cylindrical body 1 are inserted in this order from the lower opening of the valve 1. A valve seat 11 is formed at the upper mouth of the cylinder body 1, and the lift valve 2 faces the valve seat 11 from above within the closure 3.

A pair of legs 21, 21 hangs down from the lift valve 2, and permanent magnets 22, 22 are protruded from the outside of the lower end of each leg 21, 21. As shown in FIG. 5, these permanent magnets 22, 22 are loosely inserted into a pair of guide grooves 30, 30 that are cut opposite to each other in the lower end of the closure 3, and thereby the closure 3 and the lift valve 2 and is combined in a conjunctive state.

Further, an annular magnet 4 whose polarity alternates at approximately 90 degree intervals is fitted and fixed to the lower part of the cylinder 1, and when the gas tank is assembled, this magnet 4 is connected to the permanent magnets 22, 22 disposed on the lift valve 2. The annular magnet 4 is vertically opposed to the annular magnet 4.

FIG. 5 is a diagram showing the fully closed state, in which the permanent magnets 22, 22 disposed on the lift valve 2 are attracted to the annular magnet 4 externally fitted onto the cylinder body 1. That is, in this state, the opposing surfaces of the permanent magnet 22 and the annular magnet 4 have opposite polarities and are attracted to each other.

When the closing member 3 is opened and rotated from this state, the permanent magnets 22, 22 disposed on the lift valve 2 are moved to the annular magnet 4.
rotates along the circumference while facing the top surface of the
Eventually, the permanent magnet 22 enters the polarity reversal region of the annular magnet 4.

Then, the permanent magnet 22 and the annular magnet 4 repel each other, and the lift valve 2 is lifted to open the upper end of the cylinder 1.

Further, when the closing member 3 is rotated to close in the opposite direction to the opening operation described above, the lift valve 2 operates in the opposite manner to the opening operation described above, closing the upper end of the cylinder 1 and cutting off the gas flow path. Become.

As described above, in the above-mentioned conventional lift valve, the lift valve 2 snaps open and closes only when the closure 3 is in the vicinity of the fully open position, so the flow path inside the gas tank is rarely left half-open, and it is connected to the downstream side of the gas tank. Malfunctions of gas appliances can be prevented.

However, in the above-mentioned conventional gas tank, the lift valve 2 operates almost instantaneously and selects either the open or closed state, but in some cases the lift valve 2 may be left in the half-open state. There was a problem that there was.

This consists of a permanent magnet 22 disposed on the lift valve 2,
22 passes through the polarity reversal area of the annular magnet 4,
This is because the lift valve 2 is in a floating state within the magnetic field of the annular magnet 4.

That is, when the permanent magnet 22 rotates and passes through the polarity reversal region of the annular magnet 4, the magnetic force in the valve opening direction and the magnetic force in the valve closing direction acting on the lift valve 2 from the annular magnet 4 are dynamically approximately equal to each other. It balances out. If we look closely at the opening/closing operation of the lift valve 2 at this time, we can see that it is as shown in the graph of Fig. 7, and when the closure 3 is left in a state just before fully opening, the lift valve 2 is The lift valve 2 is left in a half-open state, floating near the center of the slope region of the graph, that is, at an intermediate position between the open and closed valve states.

[Technical issues]

In the present invention, a lift valve 2 is disposed facing the downstream side cylinder opening of a cylinder 1 whose interior is a gas flow path, and the lift valve 2 is inserted into a gas passage hole 31 formed in a closure 3. Permanent magnets 22, 22 are provided protruding from the sides of the lift valve 2, and an annular magnet 4 facing from below the permanent magnets is connected to the cylindrical body 1.
In order to prevent the lift valve 2 from being left half-open in a gas tank where the annular magnet 4 is arranged and fixed on the outer periphery and the polarity of the annular magnet 4 is reversed at regular intervals along the circumferential direction, the lift valve 2 is fixed. When the permanent magnets 22, 22 disposed in the valve 2 pass through the polarity reversal region of the annular magnet 4, the lift valve 2 is placed in either an open or closed state so that it does not become floating in the magnetic field of the annular magnet 4. The challenge is to keep it fixed.

[Technical means]

The technical means of the present invention for solving the above problems is to provide a protrusion 23 on the side of the lift valve 2, and to move a vertically protruding strip 59 fixed to the main body of the lift valve 2 within the rotation locus of the protrusion 23. This protrusion 59 is provided in an area from the polarity reversal area of the annular magnet 4 to just before the fully open position of the closure 3.

[Effect]

The above technical means works as follows.

When the closure 3 in the fully closed state is rotated in the opening direction, the lift valve 2 connected to the closure 3 also rotates following the closure 3 while closing the downstream cylinder opening of the cylinder body 1. . At this time, the protrusion 23 protruding from the side of the lift valve 2 also moves close to the raised strip 59.

Permanent magnets 22, 2 provided on the lift valve 2
2 enters the polarity reversal region of the annular magnet 4, the tips of the protrusions 23 protruding from the sides of the lift valve 2 come into pressure contact from the inside with the protrusions 59 protruding within the rotation locus. Become. The state of pressure contact between the protrusion 23 and the raised strip 59 is maintained until the permanent magnets 22, 22 completely pass through the polarity reversal region of the annular magnet 4.

Eventually, when the permanent magnet 22 completely passes through the polarity reversal region of the annular magnet 4, a magnetic force sufficient to lift the lift valve 2 to the fully open state begins to act between the permanent magnet 22 and the annular magnet 4. As a result, the protrusion 23 protruding from the side of the lift valve 2 is also removed from the position of the raised strip 59 in the circumferential direction, and the protrusion 23
The pressing force that was acting between the ridge and the raised strip 59 disappears.

Thereafter, the opening/closing operation of the lift valve 2 is controlled only by the magnetic force from the annular magnet 4. At this point, the permanent magnet 22 disposed on the lift valve 2,
Since a magnetic force sufficient to urge the lift valve 2 to the fully open state is acting between the lift valve 22 and the annular magnet 4, the lift valve 2 is instantaneously moved to the fully open state.

As mentioned above, according to the technical means of the present invention,
When the permanent magnet 22 of the lift valve 2 passes through the magnetic pole reversal region of the annular magnet 4, the lift valve 2 is forcibly fixed in the closed state, and the lift valve 2 becomes floating in the magnetic field of the annular magnet 4. Never.

Furthermore, when the closure 3 is rotated back from the above-mentioned fully open state to the fully closed state, the lift valve 2 operates in the reverse order to the above-mentioned opening, and the lift valve 2 is momentarily moved to the initial position of the close rotation of the closure 3. The valve becomes closed.

〔effect〕

The present invention has the following unique effects.

When the permanent magnet 22 of the lift valve 2 passes through the magnetic pole reversal region of the annular magnet 4, the lift valve 2 is forcibly fixed in either the open or closed state, and the lift valve 2 is in the magnetic field of the annular magnet 4. Because it doesn't float, lift valve 2
is never left half-open.

[Embodiment]

In this embodiment, the raised strips 59 are inclined downward in the direction of opening and rotation of the closing member 3.

According to this embodiment, when the protrusion 23 of the lift valve 2 starts to come into contact with the raised strip 59 by opening and rotating the cock, the protrusion 23 is guided by the inclined surface of the raised strip 59 and is further closed. It will be in a state where it is biased in the direction,
There is an advantage that the valve is kept in a closed state while the permanent magnet 22 of the lift valve 2 passes through the polarity half-turn region of the annular magnet 4.

Also, contrary to the above, when the cock is rotated to return to the fully closed state, the lift valve 2 is rotated closed while being reliably biased to the open state for the same reason as above. .

〔Example〕

Next, the embodiments of the present invention described above will be described in detail with reference to the drawings.

As shown in FIG. 1, the legs 21, 21 hanging down from the sides of the lift valve 2 have guide grooves 30 for the closure 3.
A sliding protrusion 26, a protrusion 23, and a permanent magnet 22 that slide inside are arranged in this order from top to bottom.

A fixed cylinder 5 having an inner diameter one size larger than the outer periphery of the lift valve 2 is fitted onto the lift valve 2, and the fixed cylinder 5 is fixed at an appropriate position on the main body. Further, the fixed cylinder 5 is made of elastic synthetic resin, and when the lift valve 2 is inserted into the fixed cylinder 5, the protrusions 23, 2 provided on the lift valve 2
The inner diameter is set to such an extent that the spherical protrusion 25 at the third tip comes into pressure contact with the inner wall of the fixed cylinder 5.

Two sets of cut-out windows corresponding to the protrusions 23, 23 provided on the lift valve 2 are provided on the side wall of the fixed cylinder 5, and one set of cut-out windows is formed by two adjacent cut-out windows 5.
It consists of 0,51. In this embodiment, the space between the cut-out windows 50 and 51 becomes the previously mentioned raised strip 59.

Further, the mutual relationships between the cylinder 1 and the annular magnet 4, as well as between the cylinder 1 and the lift valve 2 and the closure 3, are constructed in the same manner as in the prior art described above.

Now, when the closing member 3 is in the closed state, the spherical protrusion 25 at the tip of the protrusion 23 is located near the lower side within one cut-out window 50 of the fixed cylinder 5, as shown in FIG. . When the closing member 3 is opened and rotated from this state, the spherical protrusion 25 of the protrusion 23 moves toward the other cut-out window 51 provided in the fixed cylinder 5, and eventually moves between the two cut-out windows 50 and 51. It comes into contact with the raised strip 59. Then, the spherical protrusion 25 of the protrusion 23 is guided by the inclined surface of the ridge 59 of the cut-out window 50 and is further urged downward, and in this state advances toward the other cut-out window 51, It is hidden inside the raised strip 59. Then, the spherical protrusion 25 of the protrusion 23 comes into pressure contact with the inner circumferential surface of the raised strip 59 as shown by the two-dot chain line in FIG. 3 and the lower dotted line in FIG. 4. As a result, the lift valve 2 is forcibly biased to the closed state. And the protrusion 2
3 escapes into the other cut-out window 51, the permanent magnet 22 has escaped from the polarity half-turn region of the annular magnet 4, and the lift valve 2 is connected to the permanent magnet 22 disposed in the lift valve 2 and the annular magnet. It is lifted upward by the magnetic force acting between the two. As a result, the protrusion 23 provided on the lift valve 2 is inserted into the cut-out window 51 as shown in FIG.
It will be located at the upper part of the interior.

Also, when the closing member 3 is rotated back to the closing direction,
Each part moves in the reverse order from when the valve was opened, and the valve returns to the closed state.

In the above embodiment, the legs 21, 2 of the lift valve 2
1, the sliding protrusion 26 and the protrusion 23 are provided separately, but it is conceivable that the protrusion 23 also performs the function of the sliding protrusion 226, thereby making the sliding protrusion 26 unnecessary. That is, the fixed cylinder 5 is loosely fitted to the outside of the lower end of the closure 3, and the protrusion 23 is cut into the guide groove 3 at the lower end of the closure.
0 to the inner wall of the fixed cylinder 5. When this structure is adopted, there is an advantage that the gas tank does not become taller than that of the above embodiment.

Further, in the embodiment described above, the tip of the protrusion 23 provided on the side of the lift valve 2 is a spherical protrusion, but a concave portion is provided on the top surface of the protrusion 23 and a ball is inserted into the concave portion. It may also be accommodated.

[Brief explanation of drawings]

FIG. 1 is an exploded perspective view of the main parts of the embodiment of the present invention, FIG. 2 is a sectional view of the embodiment of the present invention, FIG. 3 is an explanatory diagram of the relationship between the protrusion 23 of the lift valve 2 and the fixed cylinder 5, Fig. 4 is an explanatory diagram of the operation of the lift valve 2, and Figs. 5 to 7 are explanatory diagrams of conventional examples.
... Annular magnet, 5 ... Fixed cylinder, 22 ... Permanent magnet, 23 ... Protrusion, 59 ... Raised strip.

Claims (1)

[Claims for Utility Model Registration] A lift valve 2 is disposed facing the downstream end of a cylinder 1 whose interior is a gas flow path, and the lift valve 2 is formed in a gas passage hole in a closure 3. 31
The lift valve 2 has permanent magnets 22, 22 protruding from the side thereof, and an annular magnet 4 facing from below the permanent magnets is arranged and fixed on the outer periphery of the cylindrical body 1. In the gas tank in which the polarity of the annular magnet 4 is reversed at regular intervals along the circumferential direction, a protrusion 23 is provided on the side of the lift valve 2, and a protrusion 23 in the vertical direction is fixed to the tank body. The raised strip 59 is made to slightly protrude into the rotation locus of the protrusion 23, and this raised strip 5
9, the protrusion 23 is provided in the area from the polarity reversal area of the annular magnet 4 to just before the fully open position of the closure 3. The gas tank according to claim 1, wherein the raised strip 59 is inclined downward in the direction of opening and rotation of the closing member 3.