JP2563010Y2 - Electromagnetic safety valve device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electromagnetic safety valve device interposed in a fuel supply passage of a gas water heater, a gas stove or other combustors.

[0002]

2. Description of the Related Art As a conventional electromagnetic safety valve device, as shown in FIGS. 3 and 4, an end e of a lever b which can swing about a fulcrum a is arranged to face a pressing portion h of an electromagnetic safety valve g.
An electromagnetic safety valve g is pressed and opened by the lever b (Japanese Utility Model Laid-Open No. 63-101748). In the figure, d is an operating rod for pressing one end c, x is an arcuate surface of an end e of a lever b, i is a sealing surface, y is a pressing surface of a pressing portion h, g
-1 indicates an adsorbent, g-2 indicates an electromagnet, F indicates a push button, and G indicates a heart cam.

[0003]

The present invention is to provide a above conventional lever b
The contact point between the arcuate surface x and the pressing surface y of the pressing portion defines the fulcrum.
The line z parallel to the opening direction of the electromagnetic safety valve g
When the valve is opened while approaching , the contact point between the arcuate surface x of the end e of the lever b and the pressing surface y of the pressing portion of the electromagnetic safety valve g from the start of the opening of the electromagnetic safety valve g to the end of the valve opening. Are shifted in the opposite direction. That is, the contact point shifts leftward on the arcuate surface x, but shifts rightward on the pressing surface y. For this reason, the arcuate surface x and the pressing surface y slide, and metal powder is generated, which adheres to the sealing surface i of the electromagnetic safety valve g and deteriorates the sealing performance.

An object of the present invention is to provide an electromagnetic safety valve device free from such a problem.

[0005]

According to the present invention, in order to achieve the above object, the end of a lever that can swing around a fulcrum is disposed opposite to the pressing portion of the electromagnetic safety valve, and the lever is pressed by the lever. In the valve which is opened, the end of the lever is formed in an arcuate surface, the pressing surface of the pressing portion of the electromagnetic safety valve is formed in a surface orthogonal to the opening and closing direction of the electromagnetic safety valve, and the electromagnetic force is applied by the lever. If the safety valve is pressed open
Come, the contact point between the pressing surface of the arcuate surface and said pressing portion of said lever,
The line passing through the fulcrum and parallel to the opening direction of the electromagnetic safety valve is
The valve is opened while gradually retreating, and before the most retreat position
Press the operating range of the lever so that the opening of the electromagnetic safety valve is completed.
It is characterized in that an enclosure is set .

[0006]

According to the electromagnetic safety valve device having the above-described structure, the arc-shaped surface 2b2 and the electromagnetic safety valve 5 during the time when the electromagnetic safety valve 5 is pressed and opened by the lever 2, that is, from the start of valve opening to the end of valve opening. Since the displacement of the contact point with the pressing surface 5e is in the same direction, that is, as shown in FIG. 2, for example, the displacement of the contact point between the arcuate surface 2b2 and the pressing surface 5e of the electromagnetic safety valve 5 is both leftward. Therefore, the arc-shaped surface 2b2 moves so as to substantially roll on the pressing surface 5e of the pressing portion 5a.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

In the drawings, reference numeral 6 denotes, for example, an electromagnetic safety valve device of a gas water heater. In a gas passage 7 provided in the electromagnetic safety valve device 6, an electromagnetic safety valve 5 and a lever that can swing around the fulcrum 1 are provided. The pressing portion 5a of the electromagnetic safety valve 5 is provided at the end 2b of the lever 2 so as to face the same. To explain this further, the swingable lever 2 pivotally supports the middle in the gas passage 7 and has one end 2a of the operating rod 3 which is pressed by a push button F inserted in the front operation panel. Rear end 3a
And a metal pressing portion 5a provided at the center of the electromagnetic safety valve 5 faces the other end 2b. In this embodiment, the end 2 of the lever 2
b, a separate push pin 2b1 having an arcuate surface 2b2 was attached. 5e is a pressing surface of the pressing portion 5a,
The pressing surface 5e is pressed by the arc-shaped surface 2b2 of the lever 2 perpendicular to the opening and closing direction of the lever 2.

In FIG. 1, reference numeral 5b denotes a sealing surface of the electromagnetic safety valve 5, 5c denotes an adsorbent of the electromagnetic safety valve 5, and 5d denotes an electromagnet for adsorbing the adsorbent 5c.

The lever 2 is configured to be swingable about an intermediate fulcrum 1, and the operating rod 3 is configured to be able to move forward and backward in the front-rear direction. Further, a shut-off valve 8 that is opened and held at an intermediate position of the push button F is fixed to the operating rod 3, and an ignition valve 9 having a small diameter portion that is opened just before the end position of the push button F. Is formed.

Thus, according to the pressing operation of the push button F from the starting end position, the shut-off valve 8 is opened just before the intermediate position via the operating rod 3 which moves backward, and the ignition valve is opened just before the end position. Nine valve opens are provided. The electromagnetic safety valve 5 is opened and held at the terminal position where the adsorbent 5c contacts the electromagnet 5d via the operation 3 and the swinging lever 2.

Although the above construction is not particularly different from the conventional push-push type using the heart cam G, in this embodiment, a line passing through the fulcrum 1 of the lever 2 perpendicularly to the opening / closing direction of the electromagnetic safety valve 5. a is a line segment D that connects the contact points B and fulcrum 1 between the pressing portion 5a and the push pin 2b ₁ of the electromagnetic safety valve 5 at the valve opening start, of the pressing portion 5a and push pin 2b1 at the valve opening end The angle θ formed by the line segment E connecting the contact point C and the fulcrum 1 is set to be a bisector that substantially divides the included angle θ.

When doing so, especially as shown in FIG.
The opening / closing direction of the electromagnetic safety valve 5 from the start of valve opening when the electromagnetic safety valve 5 is pushed open by the push pin 2b1 to the end of valve opening and the vector of the pressing force of the lever 2 acting on the electromagnetic safety valve 5 should be substantially the same. Therefore, it is possible to eliminate the twisting when the electromagnetic safety valve 5 is opened, and the pressing force works effectively from the start of the valve opening to the end of the valve opening. The operating force can be reduced.

[0014] In addition, the push pin 2b1 from the time of opening the start of the electromagnetic safety valve 5 until the time of the opening end and the electromagnetic safety valve 5
Displacement of the contact point between the pressing portion 5a of, the same direction and ing between pushing surface 5e side of the pressing portion 5a of the arcuate surface 2b2 side and the electromagnetic safety valve 5 pushpin 2b1.

By the way, as shown in FIG.
When swinging clockwise, the contact point
2b2, move away from the fulcrum 1 side as shown by B, C, and K.
And on the pressing surface 5e as indicated by B, C and K
After being displaced in the direction away from line X, further from the position indicated by K
When the lever 2 is swung, it is displaced in a direction approaching the line X, and
When it is displaced in the direction approaching X, the surface on the arcuate surface 2b2 and the pressing surface 5e
The direction of displacement of the contact point above is reversed. Therefore,
Conditions for the displacement of the touch point to be in the same direction as described above
As shown in FIG. 2, the arc-shaped surface 2b2
The point of contact of the portion 5a with the pressing surface 5e is
From the line X passing through and parallel to the pushing direction of the electromagnetic safety valve 5
The pressing operation range of the lever 2 can be set in a far area.
And As a result, the arc-shaped surface 2b2 moves so as to substantially roll on the pressing surface 5e on the pressing portion 5a, and metal powder is generated as in the case of sliding, and adheres to the sealing surface 5b of the electromagnetic safety valve 5, and There is nothing to make it worse.

In FIG. 2, the contact point L is the pressing portion 5a.
Of the electromagnetic safety valve 5 passes through the fulcrum 1
Out of the area gradually away from the line X parallel to the pushing direction (to the line X
This shows a bad case in which the lever 2 has been pressed down to the (area approaching) .

In this case, the point of contact with the pressing surface 5e on the arcuate surface 2b2 moves to the left along with the swing of the lever 2, but on the pressing surface 5e, the direction approaching the line X, that is, in the right direction. Move on. Therefore, the displacement of the contact point between the arcuate surface 2b2 and the pressing surface 5 is in the opposite direction.

Further, in the present embodiment, the electromagnetic safety valve 5 acts as a stopper for the operation stroke due to the contact between the adsorbent 5c and the electromagnet 5d, and at the end of the opening of the electromagnetic safety valve 5 at which the operation pressing force is maximized, the push pin is closed. 2b1 presses the center of the electromagnetic safety valve 5 so that the electromagnetic safety valve 5 is prevented from being strained due to an unbalanced load, and the adsorption performance and the durability are improved.

[0019]

[Effect of the Invention] As described above , when the present invention is applied,
By providing a configuration that displacement of the point of contact with the pushing surface of the arcuate surface and the electromagnetic safety valve from the start of the solenoid safety valve open until the time of the valve opening end becomes the same direction, arcuate surface provided on the lever,
By pressing the pressing surface of the pressing portion while moving so as to substantially roll on the pressing surface of the pressing portion, sliding occurs as in the conventional example to generate metal powder, which is the sealing surface of the electromagnetic safety valve. Does not degrade the sealing performance by adhering to the surface.

[Brief description of the drawings]

FIG. 1 is a cutaway front view showing an embodiment of the present invention.

FIG. 2 is an operation explanatory view in which main parts of FIG. 1 are enlarged.

FIG. 3 is a cutaway front view of a conventional example.

FIG. 4 is an operation explanatory view in which a part of FIG. 3 is enlarged.

[Explanation of symbols]

 1 fulcrum 2 lever 2b end 3 operating rod 5 electromagnetic safety valve 5a pressing part 5e pressing surface

Claims (1)

(57) [Scope of request for utility model registration] An end of a lever that is swingable about a fulcrum is disposed opposite to a pressing portion of an electromagnetic safety valve, and the electromagnetic safety valve is pressed and opened by the lever. with the configuring the arcuate surface and said pressing surface of the pressing portion of the electromagnetic safety valve configured to a plane perpendicular to the opening and closing direction of the electromagnetic safety valve, and pushes open the electromagnetic safety valve lever
Come, the contact point between the pressing surface of the arcuate surface and said pressing portion of said lever,
The line passing through the fulcrum and parallel to the opening direction of the electromagnetic safety valve is
The valve is opened while gradually retreating, and before the most retreat position
Press the operating range of the lever so that the opening of the electromagnetic safety valve is completed.
An electromagnetic safety valve device , wherein an enclosure is set .