JPH0663631B2 - Safety equipment for gas appliances - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a safety device for a gas appliance with a replaceable container.

(Prior Art) In this type of gas appliance, when a gas container is connected to a governor and a knob is operated, gas is passed to an operating portion such as a burner, and at the same time, ignition can be performed. There is also a structure in which, when the gas container is properly connected, it is held so as not to accidentally come off, and the danger preventing device works against abnormal heating to forcefully remove the gas container.

However, the conventional gas appliance has a problem because it has a structure in which the gas container can be attached even when the appliance stopper is in the "open" state. This is because, if the gas container is attached in the “open” state, the gas will be ejected from the operating part such as the burner as soon as it is attached. This is also the case when the gas container is reset after the danger prevention device has worked, and there is a problem that the gas is leaked by resetting it as it is because the gas is in a communicating state.

(Problem to be Solved by the Invention) The present invention is to solve the above-mentioned problem, and the problem is that the gas container can be mounted only when the instrument stopper pick is in the fire extinguishing position, whereby inadvertent gas The goal is to prevent leaks and increase safety.

(Means for Solving the Problems) In order to solve the above problems, the present invention has a receiving port 11 into which a nozzle portion of a gas container that can be retracted and inserted is inserted, and gas discharged from the nozzle portion to an operating portion. Flowing gas passage 1
Is installed in the governor on the same axis as the gas passage 1 in order to operate the governor 2 which is linearly provided inside the receiving port 11 and the valve body 3 which opens and closes the gas passage and adjusts the gas flow rate. And a retractable member 5 that moves forward against the spring force when pushed by the gas container is provided substantially parallel to the instrument stopper shaft 4, and the instrument stopper shaft 4 is Only when in the fire extinguishing position, there is a notch 6 that allows the retractable member 5 pushed by the gas container to pass therethrough, and in the other positions, spring-biased safety that prevents passage of the retractable member 5 The lever 7 is provided integrally with the instrument stopper shaft 4 in front of the retractable member.

(Example) Hereinafter, description will be given with reference to the drawings. As shown in FIG. 1, when the nozzle portion N of the gas container B is inserted into the receiving port 11 of the governor 2, the built-in on-off valve V is opened and the gas is passed through the gas passage 1
Drain to.

The governor 2 is composed of a main body 2A and a cover 2B, and the main body 2A has a gas passage 1 extending from a receiving port 11 to an outlet 12 to a working portion such as a burner, and is regulated by a diaphragm 8 that separates the boundary from the cover 2B. A pressure chamber 13 is provided.

The valve body 3 opens and closes the gas passage 1 and adjusts the gas flow rate, and includes the nozzle N, an operating rod 25 described later, and an instrument plug shaft 4.
Cylinder chamber inside the main body
It is slidably mounted in a valve hole of a support body 15 provided on the pressure regulating chamber side of 14 in a state of being biased by a spring 16 in a closing direction. Reference numeral 17 denotes a pressure-sensitive piston fitted and inserted in the cylinder chamber 14, which also serves as a seat for the closing spring 16. Reference numeral 18 is a piston operating pressure setting spring, and 19 is a spring that causes the valve opening means 20 in contact with the nozzle N to oppose the nozzle.

The instrument stopper shaft 4 is a member for operating the valve body 1, and is engaged with a small hole 22a formed in the cam plate 22 by a pin 21 provided around the shaft to rotate the small hole 22a, and the cam slope 23 and the governor cover. The cam projection 24 provided on the side allows the cam plate 22 to be moved in the axial direction, and the valve body 1 to be advanced through the operating rod 25 at the center of the cam plate. 26 is a screw device that connects the tip of the operating rod and the diaphragm 8; 27 is the valve support 15 and the diaphragm 8;
The first spring 28 is provided between the diaphragm 8 and the cam plate 22.
2 shows a second spring provided between the two.

The retractable member 5 is fitted in an axial sliding hole 30 formed in the lower part of the main body, and one end is on the flange F side of the gas container B,
The other end is located on the side of the safety lever 7, and in the set state in which the gas container B is correctly held by the holding means 50 in the governor 2, the one end 31 is pushed by the flange F. At that time,
The other end 32 has a length protruding forward from the safety lever 7. 33 is a spring for urging the retractable member 5 toward the flange,
Reference numeral 34 represents a stopper for preventing the member 5 from coming off.

The safety lever 7 having the notch 6 is provided when the instrument plug shaft 4 protruding from the governor cover 2B is in the "fire extinguishing" position (6th
FIG. 2) engages with the instrument plug shaft 4 so that the notch 6 is positioned at an angle at which the retractable member 5 passes, and is urged by the spring 35 to a position that prevents passage of the retractable member 5 except at the fire extinguishing position. (Fig. 7). Reference numeral 36 denotes a blocking surface for the retractable member 5. The instrument plug shaft 4 can operate the valve body 3 by the cam mechanism while being rotatably supported by the governor cover 2B. The mechanism 40 for defining the rotation position (angle) is composed of a large-diameter disc-shaped instrument stopper disc portion 41 which is accommodated in a cylinder of a governor cover provided at the inner end portion of the instrument stopper shaft 4, and the disc portion of the disc portion. A plurality of notch-shaped engaging portions 9a, 9b formed in the circumferential direction of the outer peripheral surface corresponding to the respective positions, an engaging element arranging opening 42 opened at a predetermined position of the governor cover 2B, and arranged therein. It has a spherical engagement element 10 and a push spring 43 that pushes the engagement element 10 into the notches 9a ... (FIG. 8). The notches 9a ... And the spring-biased engaging elements 10 engaged with the notches 9a fix the instrument plug shaft 4 at positions such as fire extinguishing, high heat (ignition), medium heat, and low heat.

Further, in the illustrated example, a piezoelectric element P is installed around the instrument stopper shaft 4, and a hammer 45 for operating the element is provided so as to rotate integrally with the instrument stopper shaft 4. Reference numeral 46 is a metal fitting fixed to the governor, and the other end of the return spring 35 is locked. The hammer 45 and the safety lever 7 are provided on the instrument plug shaft 4 outside the governor cover 2B in the above example. ing. However, one of them or the cover can be provided on the instrument stopper shaft 4, and FIGS. 9 and 10 show an example thereof, in which the safety lever 7 is provided in the governor cover and the instrument stopper positioning mechanism is provided. The disc has been removed. In this case, for positioning, if the cam slope 23 shown in FIG. 5 is provided with a plane portion 47 (chain line in the figure) perpendicular to the axial direction, the influence of torque can be eliminated. The holding means 50 for holding the gas container B
Is composed of a yoke 48 that constitutes a magnetic circuit that is magnetically attracted to the container flange F, and a permanent magnet 49 housed inside the yoke 48.

(Operation) In the device of the present invention configured as described above, the instrument stopper shaft 4
Is in the fire extinguishing position shown in Fig. 6 or Fig. 10,
Since the retractable member 5 is not obstructed by the safety lever 7, when the gas container B is pushed into the receiving port 11 of the governor 2, it is pushed by the flange F and can pass through the notch 6 of the safety lever 7. Therefore, the nozzle N of the gas container B has the valve opening means 20.
Is opened to discharge the gas into the passage 1, and the flange F is magnetically held by the holding means 50.
It becomes a safe set state.

Then, when the instrument plug shaft 4 is rotated in the ignition direction (counterclockwise in the drawing), the rotation causes the cam plate 22 to advance due to the engagement with the cam projection 24, so that the valve body 3 contacts the spring 16. Since the gas is pushed, the gas flows from the pressure adjusting chamber 13 to the combustion section at an appropriate pressure, the hammer 45 rotates in parallel with it, and the piezoelectric element P is pressed, so that the gas starts combustion.

If the internal pressure of the gas container B rises for some reason, the pressure causes the pressure-sensitive piston 17 to move forward from the inside of the cylinder chamber 14, and when the acting force exceeds the magnetic holding force, the piston 17 pushes the container out. At the same time, since the retractable member 5 is no longer pushed by the gas container B, it is pulled out from the notch 6 of the safety lever 7 by the return spring 33, and the safety lever 7 is constantly actuated by the spring 35 so that its blocking surface 36 is moved onto the shaft of the retractable member 5. Rotate to the coming position (Fig. 7).

As it is, the gas passage 1 is discharged from the receiving port 11 to the outlet.
Can reach up to 12. Therefore, if the gas container B is reattached, the gas will leak from the operating portion, but in the case of the present invention, the retractable member 5 prevents the gas container B from being attached, so that the gas container B has to be attached to the instrument plug. It cannot be reset until it is returned to the fire extinguishing position.

(Effect) Therefore, according to the present invention, the gas container can be attached only when the instrument knob is in the fire extinguishing position, and in other cases, the retractable member 5 interferes with the installation of the gas container itself. Since it is possible to prevent the accidental installation of the gas container, there is no risk of accidentally or inadvertently leaking the gas, and it can be seen visually that the retractable member 5 is in the way. The safety is remarkably enhanced, and remarkable effects such as unnecessary consumption of gas are exhibited.

[Brief description of drawings]

The drawings show an embodiment of a safety device according to the present invention. Fig. 1 is a vertical sectional view taken along a vertical cutting plane, Fig. 2 is a partial vertical sectional view taken along a horizontal cutting plane, and Fig. 3 is a cam. Front view of the member,
FIG. 4 is a sectional view taken along line AA in FIG. 3, FIG. 5 is a development view of a cam slope, and FIGS. 6 and 7 are front views at the time of fire extinguishing and ignition as viewed from the side of the instrument plug shaft, and FIG. Is a sectional view of the positioning mechanism, FIG. 9 is a partial vertical sectional view of a modified example, and FIG. 10 is a front view.

Claims (3)

[Claims] 1. A gas passage 1 for inserting a nozzle portion of a gas container that can be retracted and inserted, and a gas passage 1 through which a gas discharged from the nozzle portion flows to an operating portion is linearly formed in the depth of the receiving portion 11. A governor 2 provided and a rotatable instrument stopper shaft 4 provided on the governor on the same axis as the gas passage 1 for operating the valve body 3 for opening and closing the gas passage and adjusting the gas flow rate. And a retractable member 5 that moves forward against the spring force when pushed by the gas container is provided substantially parallel to the appliance plug shaft 4, and only when the appliance plug shaft 4 is in the fire extinguishing position. Has a notch 6 for passing the retractable member 5 pushed by
At other positions, a safety lever 7 spring-biased in a direction that prevents passage of the retractable member 5 is integrally provided on the instrument stopper shaft 4 in front of the retractable member. apparatus. 2. The governor 2 is a main body provided with a gas passage 1.
2A and a cover 2B partitioned by a diaphragm 8, the instrument stopper shaft 4 is rotatably supported on the cover 2B side, and one or two or more engaging portions 9 are provided on the rotating peripheral edge.
The gas appliance according to claim 1, wherein the engaging member 10 provided on the cover 2B is configured to elastically engage with the engaging portion to lock the appliance plug shaft at a desired rotation position. Safety device. 3. A piezoelectric element P is installed around the instrument stopper shaft 4, and a hammer 45 for operating the element is provided integrally rotatably on the instrument stopper shaft. Safety equipment for gas appliances.