JP3005492U - Gas cock with safety device - Google Patents

Abstract

(57) [Summary] (Modified) [Configuration] A gas cock 100 with a safety device has a first gas passage 113 having one end connected to a gas supply source and a second gas having one end connected to a gas supply passage to a main burner. Aisle 115,
A gas cock having a third gas passage 117 having one end connected to a gas supply passage to the pilot burner 5, and a communication passage capable of communicating the other end of the first gas passage with the other ends of the second and third gas passages. Main body 110, first opening / closing valve 128 for opening / closing the second gas passage, second opening / closing valve for opening / closing the communication passage
And the open / closed state maintaining means. The communication passage extends along the central axis of the gas cock main body, and the operation axes of the operating portion and the operating means are aligned with the central axis of the communication passage. [Effect] When the pilot burner is not ignited,
Even if the operation knob is accidentally rotated to open the valve, there is no risk of explosion or fire, and the structure can be simplified and inexpensive.

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. 5 of the accompanying drawings schematically shows a conventional example of such an outer tube type gas range as a whole. As shown in FIG. 5, 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. 6 is an enlarged schematic view of a portion indicated by reference numeral A in FIG. As shown in detail in FIG. 6, a main nozzle 12 for a main burner is connected to the main pipe 12 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.

[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 solve the above problems and to provide a gas cock with a safety device that can be easily replaced with a conventional gas cock and has a simple structure.

[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. And a first opening / closing valve which is arranged between the second gas passage and the communication passage and which opens and closes the second gas passage, and which operates the first opening / closing valve. An operation section for operating the second opening / closing valve, a second opening / closing valve arranged in the communication passage for opening / closing the communication passage, and a closed state holding means for holding the second opening / closing valve in a normally closed state. It acts on the closed state maintaining means to open the second on-off valve. And an open state holding means for holding the second open / close valve in an open state by acting on the closed state holding means when the pilot burner is in an ignition state. The communication passage extends substantially along the center axis of the gas cock body, and the operation axes of the operating portion and the operating means substantially coincide with the central axis of the communication passage. Is characterized by.

According to the embodiment of the present invention, the first opening / closing valve is arranged in the communication passage, and is rotated about the central axis by the operating portion to open / close the second gas passage. The second opening / closing valve is configured to be moved along the central axis of the communication passage by the operation means to open / close the communication passage, and to be connected to the first gas passage. The second gas passage extends in a direction perpendicular to the central axis of the communication passage from the opposite sides, and the closed state maintaining means keeps the second on-off valve closed and keeps the center of the communication passage at all times. A spring for displacing in the axial direction, and the operating means drives the second opening / closing valve to the open state in the direction of the central axis of the communication passage against the displacing force of the spring. Is a push button means having an operating rod extending through the central axis of rotation of the open / close valve of the The stage has a thermocouple disposed near the pilot burner and a magnet for holding the second on-off valve in the open state against the biasing force of the spring by being urged by the thermoelectromotive force of the thermocouple. Including units and.

[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 4 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 broken schematic side view, FIG. 3 is a cross-sectional view of a gas cock body of the gas cock of FIG. 1, and FIG. 4 is a cross-sectional view of a first opening / closing valve of the gas cock of FIG. 1. As shown in these drawings, the gas cock 100 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 lower central portion. is doing. Further, there is provided a first connecting portion 114 which extends outward from the peripheral surface of the upper portion of the columnar portion 112 and defines a first gas passage 113 communicating with the compartment 111. The 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, in the upper part of the columnar portion 112 of the gas cock body 110, from the position opposite to the first connecting portion 114 on the peripheral surface of the columnar portion 112, it is opposite to the first connecting portion 114. A second connecting portion 116 extending in the direction of and defining a second gas 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 cylindrical portion 112 of the gas cock body 110, the third gas passage extends outward from the position between the first connecting portion 114 and the second connecting portion 116. A third connection 118 defining 117 is provided. 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. .

As shown in FIG. 2, a first opening / closing valve 128 for opening / closing the second gas passage 115 is arranged in the communication passage. The first opening / closing valve 128 is shown in a longitudinal sectional view in FIG. 4 and as seen in a lateral sectional view in FIG. It functions in the same way as the stop valve in the gas cock of. As well shown in the longitudinal sectional view of FIG. 4, the lower portion of the first on-off valve 128 in this embodiment is a valve body portion 128A, and the upper portion thereof is a rotary drive shaft 127. A gas passage hole portion 128B is formed in the valve body portion 128A, and a screw hole 127A is formed in the rotation drive shaft 127. As shown in FIG. 2, the first opening / closing valve 128 has an operating knob 126 attached by screwing a stop screw 126A into a screw hole 127A of a rotary drive shaft 127, and a first portion of the cylinder portion of the gas cock body 110. By rotating about the central axis of 112, it can be rotated in the communication passage.

The first on-off valve 128 opens the second gas passage 115 when the gas passage hole portion 128B of the valve body portion 128A is at the position of the second gas passage 115. If not, it is in the closed state. As shown in FIG. 2, an E-shaped retaining ring 129, a washer 130 and a spring 131 are provided around the rotary drive shaft 127 of the first opening / closing valve 128 as a structure for preventing gas leakage. There is.

As shown in FIG. 2, 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 opening / closing valve 119 is made of a rubber material. The second on-off valve 119 is constantly pressed against the upper ceiling of the partition chamber 111 in the direction of the central axis of the communication channel by the deviation spring 120 provided in the partition chamber 111, and Is closed. The operation knob 126 inserted into the upper part of the cylindrical part 112 and the rotary drive shaft 127 of the first opening / closing valve 128 have a push rod 124 having an operating rod 124 acting on the second opening / closing valve 119 on the upper part thereof. A button 123 is provided.

The operating rod 124 of the push button 123 is configured to extend along the central axis of the cylinder of the first opening / closing valve 128 and to act on the second opening / closing valve 119. This push button 123 does not normally act on the second opening / closing valve 119 by the deviation spring 125 provided so as to surround the working rod 124, and the second opening / closing valve The valve 119 is biased upward so that the communication passage is closed. An O 2 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 the 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, and further through the communication passage, the gas of the valve body portion 128A of the first on-off valve 128 is further supplied. The gas flows to the third gas passage 117 through the passage hole 128B, and the gas is supplied to the pilot burner 5 through the pipe 3. 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 urged by the 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 continues to be energized, even if the pressing force of the push button 123 is released, the second opening / closing valve 119 continues to be attracted by the magnet unit 121, and accordingly, the communication path is held in the open state.

In this state, the operation knob 126 is operated to rotate so that the gas passage hole portion 128B of the valve body portion 128A of the first opening / closing valve 128 comes to a position facing the second gas passage 115. By doing so, the second gas passage 115 is opened, and the gas flowing into the first gas passage 113 through the main pipe 1 connected to the gas supply source is discharged from the compartment 111 through the open communication passage. Further, the gas is supplied from the second gas passage 115 to the main nozzle 2 through the gas passage hole portion 128B. 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.

[0026]

[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. .

Moreover, according to the configuration of the gas cock with the safety device of the present invention, since the operation shaft of the on-off valve is gathered on the central shaft of the gas cock body, the entire gas cock is installed despite the safety device. It is possible to make the external shape compact and to make the structure relatively inexpensive.

Further, despite the provision of the safety device, the position where the gas cock body pulls out the first connection part connected to the gas supply source and the second connection part connected to the gas supply path to the main burner. Since it can be the same as a conventional gas cock, it can be easily replaced with an existing gas cock.

[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.

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

3 is a cross-sectional view of a gas cock body of the gas cock of FIG.

4 is a sectional view of a first on-off valve of the gas cock of FIG.

FIG. 5 is a schematic perspective view generally showing a conventional example of an outer tube type gas range.

6 is an enlarged schematic view of a portion indicated by reference numeral A in 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 126A Stop screw 127 Rotation drive shaft 127A Screw hole 128 First on-off valve 128A Valve body portion 128B Gas passage hole portion 129 E-shaped retaining ring 130 Washer 131 Spring 132 O-ring 140 Thermocouple 141 Lead wire

Claims (5)

[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 capable of communicating with the other end of the gas passage, and a first opening / closing arranged between the second gas passage and the communication passage for opening / closing the second gas passage. Valve, an operating portion for operating the first on-off valve, a second on-off valve arranged in the communication passage for opening and closing the communication passage, and a second on-off valve always closed Closed state holding means for holding the closed state, and the closed state holding means When the pilot burner is in the ignition state, the operating means for opening the second open / close valve by operating the second open / close valve is actuated on the closed state holding means to open the second open / close valve. And an open state holding means for holding the communication passage, wherein the communication passage extends substantially along the central axis of the gas cock body, and the operating portion and the operating shaft of the operating means are A gas cock, which is substantially coincident with the central axis of the communication passage. 2. The first opening / closing valve is arranged in the communication passage, and is rotated about the central axis by the operating portion to open / close the second gas passage. The second opening / closing valve is configured to be moved by the operating means along the central axis of the communication passage to open / close the communication passage. The gas cock according to claim 1, wherein the passage and the second gas passage extend in directions orthogonal to each other with respect to the central axis of the communication passage from opposite sides. 3. The gas cock according to claim 2, wherein the closed state maintaining means is a spring that constantly shifts the second on-off valve toward the closed state toward the central axis of the communication passage. 4. The first opening / closing means for operating the second opening / closing valve in the direction of the central axis of the communication passage to open the second opening / closing valve against the biasing force of the spring. The gas cock according to claim 2, wherein the gas cock is a push button means having an operating rod extending through a central axis of rotation of the valve. 5. The open state maintaining means is urged by a thermocouple disposed in the vicinity of the pilot burner and a thermoelectromotive force of the thermocouple to cause the second on-off valve to shift the spring. The gas cock according to claim 3 or 4, further comprising a magnet unit for holding the magnet in an open state against the heat.