JP3000256U - Gas cock with safety device - Google Patents

Abstract

(57) [Summary] [Configuration] A gas cock with a safety device has a first gas passage connected at one end to a gas supply source, a second gas passage connected at one end to a gas supply passage to the main burner, and a pilot burner at one end. A third gas passage connected to a gas supply passage to the second gas passage, and a communication passage that connects the other end of the first gas passage to the other end of the second gas passage and the other end of the third gas passage. A gas cock body, a first opening / closing valve arranged in the second gas passage to open / close the second gas passage, an operation unit for operating the first opening / closing valve, and a first opening / closing valve arranged in the communication passage to open / close the same. The second open / close valve, the closed state holding means for holding the second open / close valve in a normally closed state, the operating means for acting on the closed state holding means to open the second open / close valve, and the pilot burner ignite In the state, it acts on the closed state maintaining means to open the second on-off valve. And a opened state holding means for holding the state. [Effect] Even if the operating knob is accidentally rotated and the valve opens when the pilot burner is not ignited,
There is no risk of explosion or fire because raw gas will not be ejected.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a gas cock used for a gas burner or the like, and more particularly to a gas cock used for a commercial outer pipe type gas kitchen equipment such as a commercial gas range.

[0002]

[Prior art]

 Outer tube type In the gas kitchen equipment, the outer tube type means that the main gas tube is exposed and exposed to the outside (front surface) of the equipment body. On the other hand, the one that is installed inside the equipment is called the inner pipe type. The outer tube type has advantages in terms of easiness of pipe connection, maintainability, and simplification of structure (cost reduction). Therefore, it is suitable for commercial gas stoves, etc. where appearance is not important. Has been adopted relatively often.

FIG. 4 of the accompanying drawings schematically shows a conventional example of such an outer tube type gas range as a whole. As shown in FIG. 4, the outer tube type gas range 10 has, for example, three gotoku 11 arranged on the upper surface of the range main body, and a main burner is provided at a lower portion of each of the gotoku 11. A main pipe 12 for supplying gas to each main burner is arranged on the front side of the range main body, and the main pipe 12 is connected to a gas supply source at a gas main connecting portion 6. ing.

FIG. 5 is an enlarged schematic view of a portion indicated by reference numeral A in FIG. As shown in detail in FIG. 5, the main pipe 12 is connected to a main nozzle 19 for a main burner via a gas cock 17 having an operating knob 18. Reference numeral 20 indicates a regulator for the main burner. Further, a pilot hose 14 for supplying gas to a pilot burner (burner for igniting a pilot fire) 15 is connected to the main pipe 12 via a cock 13 for a pilot. Reference numeral 16 indicates a pilot fire cock.

In such a conventional outer tube type gas range 10, in use, first, the pilot cock 13 is opened to ignite the pilot burner 15 in a match, and then the pilot cock 16 is opened. Hold the fire. After that, the pilot 18 ignites the burner by opening the knob 18 of the gas cock 17 for the main burner of the gotoku 11 to be used. After holding the pilot fire, the pilot cock 13 should be closed.

[0006]

[Problems to be solved by the device]

 The structure of a conventional gas cock such as the gas cock 17 used in such an outer pipe type gas cooker is only to open and close the stop valve by the knob. In such a conventional gas cock structure, in the case of the outer pipe type, since the knob 18 is exposed, the knob 18 is mistakenly operated and the stop valve is opened when the pilot fire is not ignited. If so, raw gas will be ejected from the main nozzle 19.

Compared with household appliances, commercial kitchen appliances have a large amount of gas input, so that the operation knob 18 is accidentally touched by an object and the stop valve of the gas cock 17 opens, resulting in long live gas. If released over time, problems such as explosion and fire may occur.

An object of the present invention is to provide a gas cock with a safety device that can solve such problems.

[0009]

[Means for Solving the Problems]

 The gas cock with safety device according to the present invention has a first gas passage which can be connected to a gas supply source at one end, a second gas passage which can be connected to a gas supply passage to the main burner, and a gas passage to a pilot burner at one end. A third gas passage that can be connected to a supply passage, and a communication passage that allows the other end of the first gas passage to communicate with the other end of the second gas passage and the other end of the third gas passage. A gas cock body, a first opening / closing valve arranged in the second gas passage for opening and closing the second gas passage, an operating portion for operating the first opening / closing valve, A second opening / closing valve arranged in the communication passage for opening / closing the communication passage, a closed state holding means for holding the second opening / closing valve in a normally closed state, and a closed state holding means And operating means for opening the second on-off valve, When the pilot burner is in the ignition state is characterized by said example Bei the opened state holding means for acting on the closed holding means stage for holding said second on-off valve in the open state.

According to the embodiment of the present invention, the closed state maintaining means is a spring that constantly shifts the second opening / closing valve to the closed state, and the operating means resists the biasing force of the spring. It is a push button means for driving the front second on-off valve to an open state, and the open state maintaining means is a thermocouple arranged in the vicinity of the pilot burner, and is biased by the thermoelectromotive force of the thermocouple. And a magnet unit for holding the open / close valve 2 in the open state against the biasing force of the spring.

[0011]

[Action]

 According to the gas cock with safety device of the present invention, the pilot burner is ignited by operating the operating means, and the first gas passage and the second gas passage are provided unless the ignition state of the pilot burner is maintained. Since they are not communicated with each other, raw gas is not injected from one end of the second gas passage even if the first on-off valve is opened by operating the knob.

[0012]

【Example】

 The invention will now be described in more detail with reference to an embodiment of the invention, with particular reference to FIGS. 1 to 3 of the accompanying drawings.

FIG. 1 is a partially cutaway schematic plan view showing the structure of a gas cock with a safety device as an embodiment of the present invention used in an outer pipe type gas stove, and FIG. 2 is a schematic plan view of the gas cock of FIG. FIG. 3 is a partially cutaway schematic side view, and FIG. 3 is a sectional view showing only the main body portion of the gas cock of FIG. 1. As shown in these drawings, the gas cock with a safety device of this embodiment is provided with a gas cock body 110, and this gas cock body 110 has a cylindrical portion 112 that defines a cylindrical compartment 111 in the central lower portion. ing. Further, there is provided a first connecting portion 114 which extends outward from an upper peripheral surface of the cylindrical portion 112 and defines a first gas passage 113 communicating with the compartment 111. This first connecting portion 114 is adapted to be connected to the main pipe 1 which is connected to a gas supply source (not shown), as well shown in FIG.

Furthermore, at the upper part of the cylindrical portion 112 of the gas cock body 110, a second gas is further extended outward from the peripheral surface of the cylindrical portion 112 in the direction opposite to the first connecting portion 114. A second connection 116 is provided that defines a passage 115. The second connecting portion 116 is adapted to be connected to the main nozzle 2 as shown in FIG. Further, on the peripheral surface of the upper portion of the columnar portion 112 of the gas cock body 110, the third gas passage 117 is extended outward from an approximately middle position between the first connecting portion 114 and the second connecting portion 116. A third connection 118 that defines The third connecting portion 118 is connected to the pipe 3 to the pilot burner 5 via the pilot cock 7, as shown in FIG. As can be seen from the drawings, the first gas passage 113 can communicate with the second gas passage 115 and the third gas passage 117 by the communication passage through the compartment 111. There is.

As shown in FIG. 2, a first opening / closing valve 128 for opening / closing the second gas passage 115 is arranged in the second gas passage 115. The first on-off valve 128 itself may have the same structure as the shut-off valve in the conventional gas cock, and the second operation can be opened and closed by rotating the operation knob 126 provided on the upper portion. Has been The knob 126 is connected to the first opening / closing valve 128 by a rotary drive shaft 127, and an E-shaped retaining ring 129 and a washer are provided around the rotary drive shaft 127 as a structure for preventing gas leakage. 130 and a spring 131 are provided.

As shown in FIGS. 2 and 3, a second opening / closing valve 119 is arranged in the upper part of the compartment 111 and in the above-mentioned communication passage. In this embodiment, the second open / close valve 119 is made of a magnetic material. The second opening / closing valve 119 is constantly pressed against the upper ceiling of the compartment 111 by the displacement spring 120 provided in the compartment 111, and closes the communication passage. A push button 123 having an operating rod 124 that acts on the second on-off valve 119 is provided on the upper portion of the column portion 112. The push button 123 does not normally act on the second opening / closing valve 119 by the shift spring 125 provided so as to surround the working rod 124, and the second opening / closing of the push button 123 does not always act on the second opening / closing valve 119. The valve 119 is biased upward so that the communication passage is closed. An O-ring 132 is provided around the operating rod 124 to prevent gas leakage.

A magnet unit 121 is arranged below the compartment 111. The magnet unit 121 is a so-called electromagnet, and when the exciting coil is energized, the second on-off valve 119 formed of a magnetic material is attracted against the deviation force of the deviation spring 120 and is continuously connected. It allows the passage to be held open.

As shown in FIG. 1 and FIG. 2, in the gas cock with safety device of this embodiment, a thermocouple 140 arranged near the pilot burner 5 is provided. The output of 140 is applied to the magnet unit 121 via a lead wire 141. The magnet unit 121 connected to the lead wire 141 can be attached and fixed to the lower portion of the columnar portion 112 by using a lock nut 122. When the pilot burner 5 is ignited, the thermocouple 140 receives the heat of the flame to generate a thermoelectromotive force, which is applied to the exciting coil of the magnet unit 121 through the lead wire 141. Then, the magnet unit 121 is urged.

Next, the overall operation of the gas cock with a safety device having such a configuration will be described. When using the outer tube type gas range using such a gas cock, first, the push button 123 is pushed. Then, the lower end of the operating rod 124 of the push button 123 pushes down the second on-off valve 119 against the shift force of the shift spring 120, and the communication passage is opened. Then, the gas flowing from the main pipe 1 connected to the gas supply source enters the compartment 111 through the first gas passage 113, further flows into the third gas passage 117 through the communication passage, and passes through the pipe 3 to the pilot burner. Gas is supplied to 5. At this time, when the pilot burner 5 is ignited by an ignition rod or the like, the pilot burner 5 is ignited. Then, the flame of the pilot burner 5 heats the thermocouple 140 arranged in the vicinity thereof.

When the thermocouple 140 is heated in this way, thermoelectromotive force is generated, and the magnet unit 121 is biased by this thermoelectromotive force, so that the second opening / closing valve 119 shifts the shift spring 120. It is attracted to the magnet unit 121 against the force. As a result, the communication passage is held open. As long as the pilot burner 5 is ignited, the thermocouple 140 continues to generate thermoelectromotive force, and the magnet unit 121 is continuously energized, even if the push button 123 is released, the second open / close valve 119 is released. Is continuously attracted by the magnet unit 121, and accordingly, the communication passage is held in the open state.

In this state, by operating the operating knob 126 to rotate it to open the second gas passage 115 by opening the first opening / closing valve 128, the main valve connected to the gas supply source is opened. The gas flowing into the first gas passage 113 through the pipe 1 is supplied to the main nozzle 2 from the second gas passage 115 through the open communication passage from the compartment 111. The gas ejected from the main nozzle 2 through the regulator 4 is ignited by the flame of the pilot burner 5 to ignite the main burner.

On the other hand, when the pilot burner 5 is not ignited, the communication passage is closed by the second opening / closing valve 119 unless the push button 123 is pressed, so the operation knob 126 is rotated. Therefore, even if the first opening / closing valve 128 opens the second gas passage 115, raw gas is not discharged from the main nozzle 2.

In other words, in this way, when the thermocouple 140 is not exposed to flame and no thermoelectromotive force is generated, the magnet unit 121 is not excited and the push button 123 is released. The on-off valve 119 is moved to the closed state by the shift force of the shift spring 120, closing the communication passage. Therefore, in this state, even if the operation knob 126 is operated to open the first gas passage 115, no gas is ejected from the main nozzle 2 and the main burner cannot be ignited.

Further, in the above-mentioned embodiment, the operation knob 126 is rotated by an operation different from the operation of pressing the push button 123 to open and close the first on-off valve 128. As another example, the following configuration is also possible. Using the thermoelectromotive force generated by the thermocouple 140, the operation knob 126 is rotated to open and close the first opening / closing valve 128. With such a configuration, simply by pressing the push button 123 and igniting the pilot burner 5, the operation knob 126 is automatically operated by the thermoelectromotive force of the thermocouple 140 due to the flame of the pilot burner 5. The main burner can be automatically ignited by rotating and opening the first opening / closing valve 128.

[0025]

[Effect of device]

 According to the configuration of the gas cock with the safety device of the present invention, when the pilot burner is not ignited, even if the operating knob is accidentally turned and the valve is opened, the raw gas is not ejected. There is no danger of explosion or fire because it does not exist.

Therefore, the safety can be assured even when used in a kitchen device such as an outer pipe type gas range in which the operation knob is apt to be accidentally actuated by accidentally hitting the operation knob. .

[Brief description of drawings]

FIG. 1 is a partially cutaway schematic plan view showing the structure of a gas cock with a safety device as an embodiment of the present invention used in an outer pipe type gas range.

2 is a schematic side view of the gas cock of FIG.

FIG. 3 is a cross-sectional view showing only a main body portion of the gas cock of FIG.

FIG. 4 is a schematic perspective view generally showing a conventional example of an outer tube type gas range.

5 is an enlarged schematic view of a portion indicated by reference symbol A in FIG. 4. FIG.

[Explanation of symbols]

 1 Main Pipe 2 Main Nozzle 3 Pipe 4 Regulator 5 Pilot Burner 100 Gas Cock with Safety Device 110 Gas Cock Main Body 111 Partition Chamber 112 Column Section 113 First Gas Passage 114 First Connection 115 115 Second Gas Passage 116 Second Connection 117 Third gas passage 118 Third connection part 119 Second opening / closing valve 120 Deflection spring 121 Magnet unit 122 Stop nut 123 Push button 124 Action rod 125 Deflection spring 126 Operation knob 127 Rotation drive shaft 128 First On-off valve 129 E-shaped retaining ring 130 Washer 131 Spring 132 O-ring 140 Thermocouple 141 Lead wire

Claims (4)

[Scope of utility model registration request] 1. A gas cock for opening and closing a passage for supplying gas to a main burner, wherein a first gas passage having one end connectable to a gas supply source and one end connectable to a gas supply passage to main burner Two gas passages, a third gas passage whose one end can be connected to a gas supply passage to the pilot burner, and the other end of the first gas passage, the other end of the second gas passage and the third gas passage. A gas cock body having a communication passage that can communicate with the other end of the gas passage, a first opening / closing valve arranged in the second gas passage for opening and closing the second gas passage, and the first An operating portion for operating the on-off valve, a second on-off valve arranged in the communication passage for opening and closing the communication passage, and a closed state for holding the second on-off valve in a normally closed state. Holding means and the second holding means acting on the closed state holding means When the pilot burner is in the ignition state, the operating means for opening the open / close valve of FIG. 2 and the open state for holding the second open / close valve by operating the closed state holding means. A gas cock having a holding means. 2. The gas cock according to claim 1, wherein the closed state maintaining means is a spring that constantly shifts the second on-off valve to a closed state. 3. The gas cock according to claim 2, wherein the operating means is a push button means for driving the second opening / closing valve to an open state against the biasing force of the spring. 4. The open state maintaining means biases a thermocouple arranged near the pilot burner and a thermoelectromotive force of the thermocouple to move the second opening / closing valve to a biasing force of the spring. The gas cock according to claim 2 or 3, further comprising a magnet unit for holding the magnet in an open state against the heat.