JPH018777Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention provides a push-type first operating tool that opens the gas valve by manual pushing operation, a spring that biases the first operating tool to return to the gas valve closed position, and A locking mechanism is provided to hold the first operating tool in a pushed position against a biasing spring, and the locking mechanism is released in conjunction with a pushing operation of a push-type second operating tool that is biased back by the spring. Gas valve operation of a gas appliance such as a water heater, which is provided with a lock release mechanism, and when the lock mechanism is released, the first operating tool is returned using the urging force of the return urging spring to close the gas valve. Regarding equipment.

Conventionally, in the above-mentioned gas valve operating device, even though the lock mechanism has been released, the first operating tool may become loose due to the interlocking rod of the push-type first operating tool and the member supporting it being twisted. The gas valve may not return smoothly to the closed position.
There was still a problem that the gas valve closing operation was not reliable.

The purpose of the present invention is to make it possible to always reliably return the first operating tool to the gas valve closed position by simply pushing the second operating tool through a rational improvement to the return operation structure of the push-type first operating tool. It is in.

The characteristic configuration of the gas valve operating device according to the present invention is that after the lock mechanism is released by the second operating tool, the push operation force accompanying a series of pushing operations of the second operating tool is applied to the first push-type operating tool to operate the gas valve. The reason is that an interlocking mechanism is provided which applies an external force to force the return to the closed position side, and its functions and effects are as follows.

In other words, there may be a situation where the first operating tool cannot be returned to its original position with only the biasing force of the return biasing spring due to twisting or the like between the interlocking rod of the push-type first operating tool and the member that supports it. Even if this occurs, the forced return external force transmitted by the interlocking mechanism can overcome the resistance such as twisting and reliably return the first operating tool to the gas valve closed position.

Moreover, since the forced return external force is applied by the pushing operation force accompanying a series of pushing operations of the second operating tool after the lock mechanism is released, it is difficult for the operator to use the original gas valve for the second operating tool. The above-mentioned forced return operation can be performed just by the closing operation, and the operation is easier than, for example, after operating the second operating tool, operating another operating tool separately and forcibly returning the first operating tool. Not only is it easy to use, but it also reliably avoids situations such as forgetting to operate, and overall, the gas valve operating device has excellent safety and operability.

Next, embodiments will be described based on the drawings.

As shown in FIGS. 1 and 2, the casing 1
A water tube heat exchanger 3 is installed in the combustion chamber of the main gas burner 2 installed in the main gas burner 2, and a water tap 5 is connected to the discharge pipe 4 of the heat exchanger 3, and a water supply pipe 6 to the heat exchanger 3 is connected. , a water stop valve 8 which is opened and closed by a push-type operating tool 7 is installed.

A burner heating capacity switching valve 11, which is switched by a sliding switching operation tool 10, is connected to the gas supply pipe 9 for the main gas burner 2, and
The gas governor 12 is interposed, and on the upper side thereof, there is a safety valve 14 that is kept open only when the pilot burner 13 is ignited, a main gas valve 15 that is manually opened and closed, and the water stop valve 8 section. A water flow responsive valve 1 that is operated to open only when the detected water flow is in an appropriate water flow state in conjunction with a diaphragm type water flow detector 16 attached to the water flow sensor 16.
7 are arranged in that order from the gas supply upstream side and inserted into the gas supply pipe line 9, thereby constructing an instantaneous gas water heater.

Water supply pipe 6 on the downstream side of the water stop valve 8
and the discharge pipe 4 via the bypass pipe 18, and adjust the amount of water supplied from the water supply pipe 6 to the discharge pipe 4 in a short-circuit state.
is installed in the bypass pipe line 18 such that it can be adjusted freely by a sliding operating tool 20, and the discharge hot water temperature is adjusted by operating the regulating valve 19.

To configure the ignition and extinguishing operation structure,
As shown in FIGS. 1 to 6, the spring 2
Push-type ignition operating tool 2 that is returned and energized by 1
2, and a push-type fire extinguishing operation tool 24 which is biased back by a spring 23 are arranged side by side, and the ignition operation tool 2
2 is provided with a locking mechanism 25 that automatically holds the push button 2 at a push position slightly returned from its most pushed position,
The lock mechanism 2 is activated when the fire extinguishing operation tool 24 is pushed.
A lock release mechanism 26 is provided for releasing the locked state of 5.

The lock mechanism 25 includes an enlarged diameter step 25a formed on the rod portion 22a of the ignition operating tool 22, a swing stopper 25b that engages with the enlarged diameter step 25a and holds the ignition operating tool 22 in the push position, and , a spring 25c that constantly biases the swing stopper 25b toward the locking side so that it automatically locks with the enlarged diameter stepped portion 25a as the ignition operating tool 22 is pushed, and a lock release mechanism 26. A conical cam 26a contacts the other swinging end of the swinging stopper 25b as the fire extinguishing device 24 is pushed, and swings the swinging stopper 25b toward the unlocking side against the spring 25c. It is composed of.

On the other hand, the safety valve 14 is attached to the cylindrical first valve casing 27 forming a part of the gas supply pipe line 9.
and the valve body 1 of the main gas valve 15.
5A are respectively closed and biased by springs 14B and 15B and arranged concentrically with the center axis of the first valve casing 27, and the center axis of the valve casing 27 is The valve of the main gas valve 15 is attached to a sliding rod 28 which is disposed concentrically with the ignition operating tool 22 and is connected to the ignition operating tool 22 so as to slide toward the back of the valve casing as the ignition operating tool 22 is pushed. The body 15A is interlocked and connected so that it is opened when the ignition operating tool 22 is pushed, and furthermore, it comes into contact with the tip of the sliding rod 28 when the ignition operating tool 22 is pushed to the innermost position. The sliding rod 28 is arranged and formed so that the valve body 14A of the safety valve 14 is opened, and as the ignition operating tool 22 is pushed to the innermost position, the safety valve 14 and the main gas valve 15 are opened. At the same time, the main gas valve 15 is held in the open state by the pushing position holding action of the ignition operating tool 22 by the lock mechanism 25, and the main gas valve 15 is closed by pushing the fire extinguishing operating tool 24. and accompanying pilot burner 1
The safety valve 14 is configured to be closed when the fire is extinguished in step 3.

Reference numeral 29 in the figure indicates an electromagnetic solenoid that keeps the safety valve 14 open only when the pilot burner is ignited based on information from the pilot burner ignition confirmation sensor 30.

Further, the ignition structure for the pilot burner 13 is such that the gas valve 32 for the side pilot burner 31 for igniting the pilot burner 13 is opened only when the ignition operating tool 22 is pushed in fully, and
The configuration is such that the side pilot burner 31 is ignited. In the figure, 33 is a connection port of the gas supply path for the pilot burner formed in the first valve casing 27 on the downstream side of the main gas valve 15, and LS is the connection port of the gas supply path for the pilot burner.
This is a side pilot burner ignition limit switch that is turned on when the side pilot burner is pushed in fully.

As shown in FIGS. 3, 4, and 6, the fire extinguishing operation tool 24 following the release operation of the lock mechanism 25
Along with a series of pushing operations, the fire extinguishing operation tool 24
A lever member 34 is provided which is operated to swing by coming into contact with the tip of the rod portion 24a integrally connected to the lever member 34, and the lever member 34 is elastically compressed and deformed as the lever member 34 swings, thereby controlling the sliding rod 28 and the ignition operation. A forced return spring 35 that elastically urges the tool 22 toward the return side is interposed between the swinging free end of the lever member 34 and the seat 28a attached to the sliding rod 28, and the forced return spring 35 As the fire extinguishing tool 24 is pushed in in a state where it is greatly compressed and deformed, the swinging free end of the lever member 34 comes into contact with the end of the ignition operating tool rod 22a that is in the pushed position to perform the ignition operation. The swinging free end of the lever member 34 is inserted into the ignition operating tool 22 so as to return the tool 22 rigidly.
The contact portion 34a is formed against the rod portion 22a.

In other words, during the fire extinguishing operation, the sliding rod 28
The main gas valve closing biasing spring 15B and the ignition operating tool return attachment may be caused by twisting between the main gas valve closing bias spring 15B and the first valve casing 27, or between the ignition operating tool rod portion 22a and the member supporting it. Even if a situation arises in which the sliding rod 28 and the ignition operating tool 22 cannot be returned smoothly with only the biasing force of the biasing spring 21, the series of push operations of the extinguishing operating tool 24 following the release of the locking mechanism 25 described above will be sufficient. The biasing action of the forced return spring 35 due to
The structure is such that the sliding rod 28 and the ignition operating tool 22 can be reliably returned to the gas valve closed position by the contact action of the contact portion 34a.

Furthermore, prior to the rigid forced return operation of the ignition operating tool 22 due to the abutting action of the abutting portion 34a, the forced return spring 35 is actuated to force the swinging rod 28 and the ignition operating tool 22 to return elastically. By doing this, even during the forced return operation, the person performing the extinguishing operation is provided with a feeling similar to that of a normal extinguishing operation.

To configure the water volume responsive valve 17, as shown in FIG. 17A is biased toward the closing side by a spring 17B, and the larger the amount of water supplied to the water supply amount detector 16 is detected, the more it slides toward the first valve casing 27 against the spring 37A. The response rod 37, which is interlocked and connected so as to be displaced, is connected to the valve body 1 of the response valve 17.
7A so as to be relatively slidable therethrough, and open the valve element 17A of the response valve 17 against the spring 17B in response to the sliding displacement of the response rod 37 when the detected water supply amount exceeds a setting. A locking operating member 38 is attached to the response rod 37.

Two-stage enlarged-diameter step portions 39a and 39b are integrally formed on the sliding rod 28, and when the ignition operating tool 22 is in the gas valve closed position when a water supply amount greater than the set water amount is detected. By locking against the first enlarged diameter step 39a on the small diameter side and against the second enlarged diameter step 39b on the large diameter side when the ignition operating tool 22 is in the holding position by the lock mechanism 25. The stopper 40 that prevents the ignition operating tool 22 from being pushed is moved to the response rod 3.
It is attached to the tip of the first valve casing side of No. 7, and is configured to safely prevent the main burner ignition operation when water is flowing, that is, when the water volume responsive valve 17 is first opened. .

Next, another embodiment will be described.

An interlocking structure is provided for applying the push operation force accompanying a series of push operations of the fire extinguishing operation tool 24 after the locking mechanism 25 is released as an external force to force the ignition operation tool 22 to return to the gas valve closed position side. Various configuration changes are possible, such as omitting the above-mentioned forced return spring 35 and creating a forced return structure based only on the contact action of the contact portion 34a formed on the lever member 34, and these forced return interlocking structures are collectively referred to as It is called a forced return interlocking mechanism 34.

Further, the push-type operating tool 22 for opening the gas valve 15 and the device additionally linked to the push-type operating tool 24 for operating the lock release mechanism 26 can be appropriately modified in various ways, and from that point of view, Both push-type operating tools are collectively referred to as a first operating tool 22 and a second operating tool 24.

The gas valve operating device according to the present invention can be applied to various gas appliances.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is an overall view of an instantaneous gas water heater, FIG. 2 is a schematic system diagram thereof,
FIG. 3 is a sectional view showing the gas valve operation structure, FIG. 4 is a view showing the forced return state of the first operating tool, FIG. 5 is a sectional view taken along the - line in FIG. 3, and FIG.
FIG. 4 is a sectional view taken along the - line in FIG. 3; 15... Gas valve, 21, 23... Spring,
22...First operating tool, 24...Second operating tool, 25
...Lock mechanism, 26...Lock release mechanism, 34
...Interlocking mechanism, 34a...Abutting portion, 35...Spring.

Claims (1)

[Claims for Utility Model Registration] A push-type first operating tool 22 that opens the gas valve 15 by a manual push operation is provided, and a spring 2 that biases the first operating tool 22 back to the gas valve closed position side.
1, and a lock mechanism 25 for holding the first operating tool 22 in the pushing position against the return biasing spring 21, and pushing operation of the push-type second operating tool 24 that is returned biased by the spring 23. A gas valve operation device for a gas appliance, which is provided with a lock release mechanism 26 that releases the lock mechanism 25 in conjunction with the release of the lock mechanism 25. A gas valve operating device for a gas appliance, which is provided with an interlocking mechanism 34 that applies a push operation force to the first operating tool 22 as an external force for forcing the gas valve to return to the closed position side. The interlocking mechanism 34 includes a spring 35 that elastically transmits the push operation force of the second operating tool 24 to the first operating tool 22, and when the spring 35 is in an elastically deformed state, the second operating tool 2
4. The gas valve operating device according to claim 1, which is provided with a contact portion 34a that rigidly transmits the pushing force of 4 to the first operating tool 22.