JP3286955B2 - Rotary gas 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 a rotary gas valve device provided with a gas cock, a safety valve, and an ignition switch and mainly applied to a gas stove.

[0002]

2. Description of the Related Art Conventionally, in this type of gas valve device,
Generally, a safety valve is arranged on an extension of the gas cock axis so that the safety valve is opened and closed in the gas cock axis direction. When the operation knob is placed on the upper surface of the filter, the gas cock is in the vertical direction, so if the stove is thin, it will be difficult to fit the gas valve device within the height of the stove. Become.

A gas valve device in which a safety valve is arranged so as to be opened and closed in a direction perpendicular to the axis of a gas cock, as disclosed in Japanese Patent Application Laid-Open No. 60-147020, is also known. Since the length of the gas valve device in the axial direction of the cock is shortened, the gas valve device can be accommodated within the height of the thin cooking stove.

In this apparatus, there is provided a lever interlocked with the operation of rotating the gas cock to the open side, and the safety valve is pushed and opened via the lever, and the ignition switch is turned on by pushing the push piece of the ignition switch. I try to ignite the burner.

[0005]

The rotation end position of the lever in the above-mentioned conventional example is a push-off position of the safety valve, and it is necessary to ensure that the ignition switch is turned on at the push-off position. Due to an assembly error, the push piece of the ignition switch may not be sufficiently pressed at the push-off position of the safety valve. for that reason,
It is necessary to start the pressing of the ignition switch with a sufficient margin before the push-off position of the safety valve,
There is a problem in that the degree of freedom in designing the mounting position of the ignition switch is restricted, and the life of a dry battery serving as a power source for ignition is shortened.

SUMMARY OF THE INVENTION In view of the above, the present invention enables the ignition switch to be reliably turned on without starting to press the ignition switch with a margin before the push-off position of the safety valve, and relates to the mounting position of the ignition switch. The task is to increase the degree of freedom in design and extend the life of the dry cell.

[0007]

Means for Solving the Problems In order to solve the above problems,
In the present invention, a gas cock, a safety valve that is opened and closed in a direction perpendicular to the axis of the gas cock, and an ignition switch,
In a rotary gas valve device in which a safety valve is pressed and opened via a lever interlocked with a rotation operation of a gas cock to an open side and a pressing piece of an ignition switch is pressed to turn on an ignition switch, the lever is set to an ignition switch. The first lever is divided into a first lever for the safety valve and a second lever for the safety valve.
The rotational force is transmitted from the lever to the second lever via a spring member.

According to the present invention, even if the second lever reaches the push-off position of the safety valve and does not rotate any more, the first lever does not rotate.
The lever further rotates while elastically deforming the spring member by the subsequent rotation operation of the gas cock. Therefore, even if the push piece of the ignition switch is not sufficiently pressed when the second lever reaches the push-off position of the safety valve, the push piece is sufficiently pressed by the further rotation of the first lever, so that the ignition switch is surely pressed. Is turned on. Therefore, it is not necessary to start the pressing of the ignition switch with a sufficient margin from just before the push-off position of the safety valve, so that the degree of freedom in designing the mounting position of the ignition switch is increased and the dry battery as a power source for ignition is used. The service life of the device is extended.

By the way, the second lever is supported coaxially with the rotation axis of the first lever, and a torsion coil spring as a spring member is extrapolated to the rotation axis, and one end and the other end of the spring are respectively connected to the first lever.
If the lever is locked to the lever and the second lever, and the rotational force is transmitted from the first lever to the second lever via a torsion coil spring, the two levers and the spring member are coaxially and space-efficiently. It can be arranged and the device can be downsized.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a thin gas stove, in which an operation knob C is disposed on the upper surface of a stove A in front of a place where a burner B is disposed. A rotary gas valve device D operated by an operation knob C as shown in FIGS. 2 and 3 is provided in A, and the fire extinguishing of the burner B and the heat power adjustment are performed by the gas valve device D.

The gas valve device D has a common valve block 1.
In addition, a gas cock 2 and a safety valve 3 are assembled, and an ignition switch 4 composed of a limit switch is mounted on the outer surface thereof. The ignition switch 4 is interposed in an ignition circuit using a dry battery (not shown) as a power source.
Is turned on, spark discharge occurs at the ignition electrode provided on the burner B.

As shown in FIG. 4, the gas cock 2 has a cock valve housing 20 formed at the front right side of the valve block 1 and a closing member 21 rotatable about an axis in a vertical direction. The inflow port 22 and the outflow port 23 formed on one side of the inner peripheral surface of the first member 21 are configured to communicate with each other through a passage hole 21 a formed in the first member 21 by forward / reverse rotation of the first member 21. The upper and lower two-plate shaft guide 5 is attached to the upper surface of the valve housing 20, and a vertically long operation shaft 6 connected to the operation knob C is inserted through the shaft guide 5, and the operation shaft 6 The closure 21 is rotated forward and reverse through the connector 24 by forward and reverse rotation.

As shown in FIG. 5, the connector 24 is vertically engaged with a concave groove 21b at an upper end of the closing member 21 at a lower claw portion 24a. Then, a cross pin 26 urged upward by a spring 25 is inserted through a split groove 60 formed at the lower end portion of the operation shaft 6, and the pin 26 is formed in the connector 24 and an engagement groove 24 b formed in the up-down direction is formed. , And the closing member 21 is rotated forward and reverse through the cross pin 26 and the connector 24 by the forward and reverse rotation of the operation shaft 6. A projection 24c is formed on the outer peripheral surface of the connector 24, and the connector 24 is formed by a projection (not shown) formed on the upper inner peripheral surface of the valve housing 20.
Is restricted between a position where the closing member 21 is fully closed and a position where the closing member 21 is fully opened.

The upper end of the connector 24 has a shaft guide 5
A cam projection 24d inserted into an arc-shaped long hole 51 formed in the lower plate 50 is provided in a protruding manner, and the cam projection 24d gradually becomes lower with the forward rotation (counterclockwise rotation) of the connector 24.
The connector 24 is lowered under the spring 27 which urges the connector 24 upward.

The engaging groove 24b has a lower wide portion 24b.
₁ , upper narrow portion 24b ₂ and intermediate downward step 24b ₃
And has a stepped shape. Also, the operation shaft 6
A non-circular cross-section 61 having a larger diameter than the other part is formed in the middle part of the shaft guide 5, and a non-circular hole 53 is formed at the lower end of the shaft insertion hole of the upper plate 52 of the shaft guide 5, and the operation shaft 6 is closed. Child 21
Is reversed to the fire-extinguishing position where is completely closed, the upper end of the non-circular section 61 is fitted into the non-circular hole 53 by the urging force of the spring 25, and the operating shaft 6 is locked in the fire-extinguishing position. ing.

When the operating shaft 6 is rotated forward from the fire extinguishing position, first, the lower end of the non-circular cross-section 61 is
Push down until it comes into contact with the lower plate 50, and
Is released below the non-circular hole 53 to release the lock. At this time, the cross pin 26 is connected to the narrow portion 2 of the engagement groove 24b.
Transition from 4b ₂ in wide portions 24b _1, dropout 24 rotates forward where the cross pin 26 by normal rotation of the subsequent operating shaft 6 is in contact with the forward direction of the groove edge of the wide portion 24b _1. By this forward rotation dropout 24 moves downward, but this time, the engaging groove 24b, the 24b downward step 24b ₃ of the cross pin 2
6, the cross pin 26 is moved down integrally with the connector 24 against the urging force of the spring 25. Then, connector 2
Operating shaft 6 up to the ignition position at which further forward rotation of
And the burner B is ignited as described later. However, when the input of the normal operation force to the operation shaft 6 after ignition is cut off, the cross pin 26 slightly reverses the operation shaft 6 by the urging force of the spring 25, and the step is formed. The narrow portion 2 of the engagement groove 24b over the 24b ₃
To migrate to 4b _2. Thereafter, the operation shaft 6 cannot be rotated forward to the ignition position, and the burner B is adjusted by the normal and reverse rotation of the operation shaft 6 between the ignition return position and the fire extinguishing position, which are slightly reversed from the ignition position as described above. I do.

As shown in FIGS. 2 and 3, a thermocouple (not shown) for detecting the flame of the burner B is provided in a longitudinally extending valve housing 30 formed on the rear left side of the valve block 1. An electromagnet 31 excited by the electromotive force and a valve body 33 having an attraction piece 32 facing the electromagnet 31 are housed. An inflow port 34 is opened in the lower surface of the intermediate portion of the valve housing 30, a valve hole 35 is formed in the front end of the valve housing 30, and the valve body 33 is closed by a spring 36 on the front closing side where the valve hole 35 is closed. And a rod 37 that is loosely inserted into the valve hole 35 is provided. The rod 37 is urged forward by a spring 38 so that the front end of the rod 37 projects forward of the valve block 1. By pushing the body 33 backward, the safety valve 3 is pushed and opened. in this way,
By arranging the safety valve 3 so as to be opened and closed in the front-rear direction orthogonal to the vertical direction which is the axial direction of the gas cock 2,
The length of the gas valve device D in the direction of the cock axis can be shortened. Even when the gas valve device D is provided so that the cock axis faces up and down on the thin-shaped stove, the gas can be kept within the height of the stove. The valve device D can be accommodated.

The valve hole 35 of the safety valve 3 communicates with the inflow port 22 of the gas cock 2 through a gas passage 1a formed in the valve block 1, and the outflow port 23 of the gas cock 2 communicates with the gas passage 1b formed in the valve block 1. The valve block 1 communicates with the outflow pipe portion 1c on the rear right side. Thus, when the safety valve 3 is opened, the gas from the inflow port 34 flows through the safety valve 3 and the gas cock 2 to the outflow pipe 1c, and the gas is supplied to the burner B from the outflow pipe 1c.

The ignition switch 4 is mounted on a lid plate 1d provided on the front left side of the valve block 1. The ignition switch 4 is provided with a pressing piece 4a made of a spring plate, and the ignition switch 4 is turned on by pressing the pressing piece 4a backward.

A rotary shaft 54 is mounted on the front end of the lower plate 50 of the shaft guide 5. The rotary shaft 54 has a first lever 7 for the ignition switch 4, a second lever 8 for the safety valve 3, Are supported above and below the lower plate 50. At the base end of the first lever 7, there is formed a projection 7a facing the rotation trajectory of the projection 62a of the drive cam 62 engaged with the non-circular cross section 61 of the operation shaft 6 in a detent manner. The projection 62a of the drive cam 62 is engaged with the projection 7a of the first lever 7 when the forward rotation is performed to the return position, and the first lever 7 is rotated by the forward rotation of the operation shaft 6 from the ignition return position to the ignition position, The tip of the first lever 7 contacts and presses the push piece 4a of the ignition switch 4 so that the ignition switch 4 is turned on.

A torsion coil spring 9 is externally mounted on the rotating shaft 54 above the first lever 7, and one end 9 a of the spring 9 is formed by a claw formed on the first lever 7. 7b and the other end 9b of the spring 9
The claw 8a, which is formed at the base end of the second lever 8 and protrudes upward through the window hole 55 of the lower plate 50, is engaged with the second lever 8 from the first lever 7 via the torsion coil spring 9. Is transmitted. At the base end of the first lever 7, there is formed a stopper portion 7c which comes into contact with the claw portion 8a of the second lever 8 and receives the urging force of the torsion coil spring 9. The second lever 8 is rotated integrally.

When the operating shaft 6 is rotated forward from the fire extinguishing position shown in FIG. 2, the first lever 7 is rotated via the drive cam 62 when the operating shaft 6 exceeds the ignition return position, and the second lever is integrally formed with the first lever 7. The lever 8 is also rotated. Then, the distal end of the second lever 8 comes into contact with the rod 37, and the rod 37 is pushed rearward against the urging force of the spring 38, so that the safety valve 3 is pressed and opened. When the second lever 8 rotates to the push-off position shown in FIG. 6A where the suction piece 32 of the safety valve 3 comes into contact with the electromagnet 31, the second lever 8 can no longer rotate. Thereafter, only the first lever 7 rotates while elastically deforming the torsion coil spring 9. For this reason, the torsion coil spring 9 serves as a cushion to prevent an excessive force from being applied to the safety valve 3. Also, the operation shaft 6 is shown in FIG.
When the ignition position shown in (B) is reached, the first lever 7
The pressing piece 4a of the ignition switch 4 is sufficiently pressed by the
The ignition switch 4 is reliably turned on, and the burner 2 is ignited by spark discharge at the ignition electrode.

When the forward rotation of the operating shaft 6 is released after ignition, the operating shaft 6 reverses to the ignition return position as described above, and this reverse rotation causes the first lever 7 and the second lever 7 to rotate as shown in FIG. 8 returns to the original position, and the push piece 4a of the ignition switch 4
Is released, the ignition switch 4 is turned off, and the pressure on the safety valve 3 is released. Thereafter, the safety valve 3 is kept open by the electromotive force of the thermocouple.

Once the operating shaft 6 reverses from the ignition position to the ignition return position, the operation shaft cannot be rotated forward beyond the ignition return position, thereby preventing the ignition switch 4 from being turned on unnecessarily. it can.

As another embodiment, the first lever 7 and the second lever 8 are pivotally supported on different shafts, and a tension spring or the like is provided between the first lever 7 and the second lever 8 between the two. It is possible to transmit the rotational force via a spring member. However, as in the above embodiment, both levers 7 and
8 is coaxially supported, and the second lever 8 is moved from the first lever 7 via a torsion coil spring 9 which is a spring member coaxially extrapolated from the first lever 7.
If the rotation force is transmitted to the lever 8, the levers 7, 8 and the spring member 9 can be arranged with good space efficiency, which is advantageous in reducing the size of the device.

In the above embodiment, the first lever 7 is rotated via the drive cam 62 by the normal operation of the operation shaft 6, that is, the operation of rotating the gas cock 2 to the open side. The rotation axis of one lever 7 is set as the operation axis 6 and the first
The lever 7 is engaged with the operation shaft 6 in a detent manner, and the second lever 8
May be supported on the operation shaft 6, and the torsion coil spring 9 may be extrapolated to the operation shaft 6.

[0027]

As is apparent from the above description, according to the present invention, by rotating the gas cock to the open side, the safety valve can be reliably pushed and opened via the second lever, and the elasticity of the spring member can be improved. Due to the deformation, the ignition switch can be reliably turned on via the first lever, and there is no need to start the pressing of the ignition switch with a margin before the push-off position of the safety valve, and the design freedom regarding the mounting position of the ignition switch is free. In addition to increasing the power, the life of a dry battery serving as a power source for ignition can be extended.

[Brief description of the drawings]

FIG. 1 is a perspective view of a stove provided with the gas valve device of the present invention.

FIG. 2 is a partially cut-away plan view thereof.

FIG. 3 is a partial cutaway side view thereof.

FIG. 4 is a sectional view taken along the line IV-IV of FIG. 2;

FIG. 5 is an exploded perspective view of a gas cock portion.

FIG. 6A is a plan view of the safety valve in a pushed-off state,
(B) Plan view at ignition position, (C) Plan view at ignition return position

[Explanation of symbols]

 2 Gas cock 3 Safety valve 4 Ignition switch 6 Operating shaft 7 First lever 8 Second lever 9 Torsion coil spring

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) F16K 5/00-5/22 F23Q 3/00 103

Claims (2)

(57) [Claims] A gas cock, a safety valve that opens and closes in a direction perpendicular to the axis of the gas cock, and an ignition switch, wherein the safety valve is pressed and opened via a lever that is interlocked with a rotation operation of the gas cock to the open side. In a rotary gas valve device in which a push piece of an ignition switch is pressed to turn on an ignition switch, a lever is provided with a first lever for an ignition switch and a second lever for a safety valve.
A first lever is rotated in conjunction with a rotation operation of the gas cock to the open side, and a rotational force is transmitted from the first lever to the second lever via a spring member. Rotary gas valve device. 2. A second lever is supported coaxially with a rotation axis of the first lever, and a torsion coil spring as a spring member is extrapolated to the rotation axis, and one end and the other end of the spring are respectively connected to the first lever. The rotary gas valve device according to claim 1, wherein the rotary gas valve device is engaged with the lever and the second lever.