JP7479259B2 - Gas cock position change limiting mechanism and gas cooker equipped with same - Google Patents

Description

The present invention relates to a gas cock position change limiting mechanism for a gas cooker equipped with a gas main pipe having a straight pipe section that is installed along the outside of the user-facing side of the gas cooker body when in use, and a gas cock that adjusts the flow rate of gas that flows through a gas supply branch pipe that supplies gas from the gas main pipe to a gas-using section, and a gas cooker equipped with the same.

Generally, gas cookers used in cooking facilities are known to be equipped with, for example, a gas main pipe that is provided along the outside of the user-facing side of the gas cooker body of the gas cooker when in use, and a gas cock that adjusts the flow rate of gas flowing through a gas supply branch pipe that supplies gas from the gas main pipe to a gas-using part such as a burner (see, for example, Patent Document 1).
This gas cooker is used by opening each gas cock one by one, and igniting the gas-using part such as a burner that corresponds to the opened gas cock with an ignition rod. After ignition, the user can manually operate the gas cock according to the situation to adjust the size of the flame in the gas-using part.

Japanese Utility Model Application Publication No. 60-82105

For example, from the standpoint of economy, some gas cookers are not equipped with a safety device to prevent the flame from going out. When the gas cock is in the closed position and the gas-using part is not in use, a part of the user's body or clothing may come into contact with the gas cock, causing the gas cock to rotate and change to the open position. In this case, if the gas-using part is a burner on a stove, gas will leak from the burner into the cooking chamber. Also, if the gas-using part is a burner inside a gas oven, the inside of the gas oven will fill with gas, and when the gas is next ignited, the gas inside the oven will ignite, causing the lid of the gas oven to forcefully open and injuring the user.

The present invention was made in consideration of the above-mentioned problems, and its purpose is to provide a gas cock position change restriction mechanism that can prevent the operating part of the gas cock of a gas cooker that is not in use from unintentionally changing from a closed position to an open position, and a gas cooker equipped with the same.

The gas cock position change limiting mechanism for achieving the above object is a gas cock position change limiting mechanism for a gas cooker that includes a gas main pipe having a straight pipe portion that is provided along the outer side of the user side of the gas cooker body when in use, and a gas cock that adjusts the flow rate of gas that flows through a gas supply branch pipe that supplies gas from the gas main pipe to a gas use part, and the mechanism is characterized by the following configuration:
The gas cock has a rotating member body that is freely rotatable around the pipe axis of the straight pipe section of the gas main pipe, and the rotating member body is configured to be switchable, through rotation about the pipe axis, between a closed maintaining state in which the operating part of the gas cock is maintained in a closed position and an open allowing state in which the operating part is allowed to be in an open position.

According to the above characteristic configuration, the rotating member body is generally arranged to be freely rotatable about the pipe axis of the straight pipe section of the gas main pipe, which is arranged relative to the gas cooker body in a state of being in use along the user's side of the gas cooker body.Therefore, by rotating the rotating member body about the pipe axis, a gas cock position change limiting mechanism can be realized that can easily switch between a closed maintaining state in which the operating part of the gas cock, which is arranged at a predetermined distance from the straight pipe section of the gas pipe, abuts and maintains the gas cock in a closed position, and an open allowing state in which the operating part does not abut and allows the gas cock to be in an open state.
In other words, this effect can be better achieved by having an abutment portion that rotates integrally with the rotating member main body and abuts against the operating part, which is in the closed position when the closed position is maintained, from an abutment direction that is opposite to the position change direction of the operating part from the closed position to the open position.
In particular, by adopting the above configuration, even in cases where multiple gas cocks are provided along a straight section of a gas pipe, a single operation of the gas cock position change limiting mechanism can place all of the multiple gas cocks in either a closed state or an open-allowed state, thereby achieving high operability.
As a result of the above, a gas cock position change limiting mechanism can be realized that can prevent the operating part of a gas cock of a gas cooker that is not in use from unintentionally changing from a closed position to an open position.

Further characteristic configurations of the gas cock position change limiting mechanism include:
The present invention has an abutment portion which rotates integrally with the rotating member main body and abuts against the operating portion, which is in the closed posture in the closed maintenance state, from the posture change direction side in a contact direction that is opposite to the posture change direction of the operating portion from the closed posture to the open posture, and an abutment state maintaining portion which maintains the abutment state of the abutment portion against the operating portion.

According to the above characteristic configuration, the abutment portion rotates integrally with the rotating member main body and abuts against the operating portion of the gas cock, which is in the closed position in the closed maintained state, from the position change direction side in an abutment direction that is opposite to the position change direction of the operating portion from the closed position to the open position, and the abutment state maintaining portion maintains the abutment state of the abutment portion against the operating portion, so that the abutment state of the abutment portion against the operating portion in the closed position is maintained by the abutment state maintaining portion, and therefore the closed position maintenance state by the gas cock position change limiting mechanism can be well maintained.

Further characteristic configurations of the gas cock position change limiting mechanism include:
the abutment portion is provided on a tip side of the rotating member body around the tube axis and in the abutment direction, and has a recessed shape that follows an outer shape of the operation portion in the closed posture in the closed state,
the abutment state maintaining portion is a locking portion that is configured to lock with the operation portion in the closed state around the tube axis of the rotating member main body and on a tip side of the abutment portion in the abutment direction,
When viewed in the tube axis direction, the distance between the tube axis and the locking portion is longer than the distance between the tube axis and the operating portion in the closed position.

According to the above-described characteristic configuration, the abutment portion having a concave shape is provided on the tip side in the abutment direction around the tube axis of the rotating member main body, and has a shape that follows the outer shape of the operating part of the gas cock in the closed position when the closed state is maintained, so that the abutment portion can abut well in a state that follows the shape of the operating part of the gas cock.
Furthermore, the locking portion, which serves as the abutment state maintaining portion, locks with the operating portion of the gas cock in the closed state maintained at a position closer to the tip than the abutment portion in the abutment direction around the tube axis of the rotating member main body, and when viewed in the tube axial direction from a direction along the tube axis, the distance between the tube axis and the locking portion is longer than the distance between the tube axis and the operating portion in the closed position. Therefore, when the rotating member main body rotates around the tube axis, the locking portion exceeds the operating portion around the tube axis, and the locking portion deforms in a direction shortening the distance between the locking portion and the tube axis, and after it exceeds the locking portion, the rotating member main body elastically deforms in a direction increasing the distance between the locking portion and the tube axis compared to the point at which it exceeded the locking portion, so that the state of being locked with the operating portion can be well maintained.

Further characteristic configurations of the gas cock position change limiting mechanism are as follows:
The abutment state maintaining portion is a biasing member that biases the rotating member main body in the abutment direction.

According to the above characteristic configuration, the abutment state maintaining section is provided with a biasing member that biases the rotating member body in the abutment direction. By appropriately setting the biasing force of the biasing member in the abutment direction, the abutment state of the abutment section against the operating section can be well maintained, and the closed state can be well maintained.

Further characteristic configurations of the gas cock position change limiting mechanism include:
the rotating member body has a surface portion visible to the user in the closed state and a back surface portion visible to the user in the open state, the surface portion and the back surface portion being disposed so as to be capable of being individually directed toward the user as the rotating member body rotates about the tube axis,
Either the front surface portion or the back surface portion is provided with a visual enhancement portion having a visual enhancement effect.

According to the above characteristic configuration, simply by rotating the rotating member body around the tube axis, the presence or absence of the visual enhancement section allows the gas cock position change restriction mechanism to be visually confirmed as to whether it is in the open-permitted state or the closed-maintained state, so that even from a relatively distant location, it is easy to see whether it is in the open-permitted state or the closed-maintained state.

Further characteristic configurations of the gas cock position change limiting mechanism include:
The rotary member body is set at an angular position around the tube axis in the closed state and an angular position around the tube axis in the open permitted state which are different from each other.

According to the above characteristic configuration, the rotating member body is set at an angle position around the tube axis when in the closed state and an angle position around the tube axis when in the open state are different, so that the user can easily visually determine whether the state is closed or open simply by looking at the rotating member body.

Further characteristic configurations of the gas cock position change limiting mechanism include:
the rotating member body includes a flat plate portion that is aligned along a moving plane of the operation unit between the closed posture and the open posture in both the closed state and the open permitted state,
The flat plate portion is provided with a closed storage aperture portion for storing the operating part in the closed position, and an open storage aperture portion capable of storing the operating part in all of the open positions.

According to the above-described characteristic configuration, by the simple operation of storing the operating part of the gas cock in either the closed storage opening or the open storage opening formed in the flat plate portion of the rotating member main body, the operating part can be placed in either a closed maintained state or an open permitted state.
In addition, in the open-permitted state, the flame strength can be changed simply by operating the operating part housed in the open-housing aperture, and high operability can be maintained since there is no need to rotate the rotating member body.

Further characteristic configurations of the gas cock position change limiting mechanism include:
The closed storage aperture portion and the open storage aperture portion are formed as a single continuous aperture,
Between the closed storage opening and the open storage opening, there is provided a movement restricting protrusion which restricts the movement of the operating part when the flat portion of the pivoting member main body is positioned along the movement plane of the operating part.

The above characteristic configuration allows the closed storage aperture and the open storage aperture to be formed as a single continuous aperture, making it easier to manufacture and more economical than forming each aperture separately.

The gas cooker that achieves the above objective is equipped with the gas cock position change limiting mechanism described above.

A gas cooker having the above-mentioned characteristic configuration can achieve the same effect as the gas cock position change restriction mechanism described above, and can prevent the operating part of the gas cock of a gas cooker that is not in use from unintentionally changing from the closed position to the open position.

1 is a schematic diagram of a gas cooker equipped with a gas cock position change limiting mechanism according to a first embodiment; 11A and 11B are diagrams showing a closed state and an open state of a gas cock position change limiting mechanism as viewed in the pipe axis direction. FIG. 11 is a plan view of a gas cock position change limiting mechanism according to a second embodiment. FIG. 11 is a partial cross-sectional view of a gas cock position change limiting mechanism according to a second embodiment, as viewed in the pipe axis direction. FIG. 11 is a partial cross-sectional view of a gas cock position change limiting mechanism according to another embodiment, as viewed in the tube axis direction, showing a configuration including a visual enhancement portion. FIG. 11 is a perspective view of a gas cock position change limiting mechanism according to another embodiment. FIG. 11 is a perspective view of a gas cock position change limiting mechanism according to another embodiment.

The gas cock position change limiting mechanism 100 according to an embodiment of the present invention and a gas cooker 50 equipped with the same are capable of preventing the operating portion K1 of the gas cock K of the gas cooker 50 when not in use from unintentionally changing from a closed position to an open position.
The gas cooker 50 and the gas cock position change limiting mechanism 100 will be described below with reference to the drawings.

First Embodiment
As shown in Figure 1, the gas cooker 50 of this embodiment has a gas stove 51 having a first burner 51a and a second burner 51b provided on a top plate 40, and a gas oven 60 having a third burner (not shown) inside and an opening 62 and a lid 61 on the user side is provided below the gas stove 51.
In addition, the top plate 40 is provided with an exhaust port 52 for discharging combustion exhaust gas from the gas oven 60 at the rear side opposite the user side (the rear side of the gas stove 51 from the user's perspective).
The gas cooker 50 includes a gas main pipe G having straight pipe sections G1 and G2 that are provided along the outside of a side surface 70s (the side surface at the tip of the arrow Y in FIG. 1) on the user's (not shown) side when the gas stove 51 or the gas oven 60 is in use, and a gas cock K that adjusts the flow rate of gas flowing through a gas supply branch pipe G3 (shown in FIG. 2) that supplies gas (e.g., city gas 13A) to the first and second burners 51a and 51b and the third burner (an example of a gas-using part) from the gas main pipe G. The gas cock K includes an operating part K1 that rotates around an axis perpendicular to the axis of the gas supply branch pipe G3, and closes the gas supply branch pipe G3 when the operating part K1 rotates to a closed position, and opens the gas supply branch pipe G3 when the operating part K1 rotates to an open position.
Here, in the first embodiment, as shown in FIG. 1, a first straight pipe section G1 is provided as the gas main pipe G above the gas cooker body 70 along the horizontal direction (the direction of the arrow X in FIG. 1), and a second straight pipe section G2 is provided below the gas cooker body 70 along the horizontal direction (the direction of the arrow X in FIG. 1).
Furthermore, four gas supply branch pipes G3 (shown in FIG. 2) are connected to the first straight pipe section G1, and gas cocks K are provided for all the gas supply branch pipes G3, with one gas cock K corresponding to each gas supply branch pipe G3. One gas supply branch pipe G3 (shown in FIG. 2) is connected to the second straight pipe section G2, and one gas cock K is provided for the gas supply branch pipe G3.

In the gas cooker 50 described above, there is a risk that a user may unintentionally touch the operating portion K1 of the gas cock K in the closed position, causing the gas cock K to change its position from the closed position to the open position, resulting in gas leakage from the first and second burners 51a and 51b of the gas stove 51 or a third burner (not shown) provided in the gas oven 60. In particular, in the gas cooker 50 that is not provided with a function to prevent the flame from going out, there is a risk that the gas leakage may continue for a relatively long period of time.
In order to avoid such a situation, the gas cooker 50 according to the first embodiment is provided with a gas cock position change limiting mechanism 100 as described below.

As shown in Figures 1 and 2, the gas cock position change limiting mechanism 100 has a rotating member main body 80 that is freely rotatable around the pipe axis P of the straight pipe sections G1, G2 of the gas main pipe G, and is configured to be switchable, through rotation of the rotating member main body 80 about the pipe axis P, between a closed maintenance state (state shown on the left in Figure 2) in which the operating part K1 of the gas cock K is maintained in a closed position, and an open permission state (state shown on the right in Figure 2) in which the operating part K1 of the gas cock K is permitted to be in an open position.
Here, the closed position of the operating part K1 of the gas cock K is a position in which the flow of gas through the gas cock K is prohibited, and the open position of the operating part K1 of the gas cock K is a position in which the flow of gas through the gas cock K is permitted.

To add a little more explanation, as shown in Figs. 1 and 2, the rotating member main body 80 is made of a long, sheet metal material extending in the pipe axis direction, and includes a wound portion 84 having a shape that follows the outer circumference of the straight pipe portions G1 and G2 of the gas main pipe G, a tangential portion 89 that is continuous with the wound portion 84 and extends in the tangential direction of the straight pipe portion G1 when viewed in the pipe axis direction P (viewed in the direction of arrow X in Figs. 1 and 2), a first flat plate portion 81 that is continuous with the tangential portion 89 and perpendicular to the tangential portion 89, a contact portion 82 that is continuous with the first flat plate portion 81 and contacts the operating portion K1 of the gas cock K in the above-mentioned closed state, and a locking portion 83 (an example of a contact state maintaining portion) that maintains the contact state of the contact portion 82 against the operating portion K1, which are continuously provided in the order described around the pipe axis P.

That is, in the first embodiment, the abutment portion 82 rotates integrally with the rotating member main body 80 and abuts against the operating part K1 in the closed posture in the closed state maintained in a posture change direction from the posture change direction (the opposite direction of the arrow Y in FIG. 2 ) of the operating part K1 from the closed posture to the open posture (the direction indicated by the arrow Y in FIG. 2 ), from the posture change direction side , is provided around the tube axis P of the rotating member main body 80 on the tip side in the abutment direction, and has a concave shape that follows the outer shape of the operating part K1 in the closed posture in the closed state maintained in a closed state (the state shown on the left in FIG. 2 ).

Here, as described above, if the abutment portion 82 is merely in contact with the operating portion K1 of the gas cock K, when the gas cock position change limiting mechanism 100 is in a closed maintenance state, when the operating portion K1 is operated, the rotating member main body 80 will rotate around the tube axis P in the opposite direction to the abutment direction, and the closed position of the operating portion K1 cannot be maintained.
In the first embodiment, a locking portion 83 that locks with the operating portion K1 in the closed state is provided as an abutment state maintaining portion around the tube axis P of the rotating member main body 80 and on the tip side of the abutment portion 82 in the abutment direction, and with respect to the rotating member main body 80 in its natural state where it is not elastically deformed, the distance between the tube axis P and the locking portion 83 (L1 on the left in FIG. 2) is longer than the distance between the tube axis P and the operating portion K1 in the closed position (the portion of the operating portion K1 closest to the tube axis P in the axial direction of the tube axis P) (L2 on the left in FIG. 2). By locking the locking portion 83 with the operating portion K1, the rotating member main body 80 is also fixed around the tube axis P.

The material used for the rotating member body 80 is preferably an alloy such as brass plated with silver, and when it changes state from the open-permitted state (state shown on the right side of Figure 2) to the closed-maintained state (state shown on the left side of Figure 2), it undergoes elastic deformation.

Now, as shown in FIG. 2, the rotating member main body 80 is set to an angular position around the tube axis P in the closed state that is different from the angular position around the tube axis P in the open-permitted state. In the configuration example shown in FIG. 2, the angular position around the tube axis P in the closed state is the angular position shown on the left in FIG. 2 where the first flat plate portion 81 is approximately horizontal (the angular position of the flat plate portion 81 is along the arrow Y), and the angular position around the tube axis P in the open-permitted state is the angular position shown on the right in FIG. 2 where the first flat plate portion 81 is inclined from the horizontal. This allows the user to easily visually determine whether the gas cock K is in the open or closed position.

Second Embodiment
The gas cock position change limiting mechanism 100 according to the second embodiment differs from the first embodiment in the configuration related to limiting the position change of the operating portion K1 of the gas cock K. The gas cock position change limiting mechanism 100 according to the second embodiment will be described below with reference to Figures 3 and 4.
In the second embodiment, the rotating member body 80 is also formed from a long, sheet metal material extending in the pipe axis direction, as shown in Figures 3 and 4. The rotating member body 80 includes a wound portion 84 having a shape that follows the outer periphery of the straight pipe portions G1 and G2 of the gas main pipe G, and a second flat portion 85 (an example of a flat portion) that is provided continuously with the wound portion 84 when viewed in the pipe axis direction (as viewed in the direction along the arrow X in Figure 4), and these are provided continuously in the order described around the pipe axis P.
As shown in Figure 3, the second flat plate portion 85 has a planar shape that follows the movement plane of the operating part K1 between the closed position and the open position, in both the closed state and the open-permitted state, and is provided with a closed storage opening 91 that stores the operating part K1 in the closed position, and an open storage opening 92 that can store the operating part K1 in all open positions.
Incidentally, as shown in FIG. 4, the rotating member main body 80 according to the second embodiment is provided at its tip end about the tube axis P with a positioning abutment portion 86 for positioning the second flat plate portion 85 on the movement plane between the closed and open positions of the operating part K1 in both the closed maintained state and the open permitted state, and the positioning abutment portion 86 positions the second flat plate portion 85 in a form that abuts against the gas supply branch pipe G3.

Furthermore, in the second embodiment, the closed storage opening 91 and the open storage opening 92 are formed as a single continuous opening 90, and a movement restricting protrusion 93 is provided between the closed storage opening 91 and the open storage opening 92 to restrict the movement of the operating part K1 at a position where the second flat portion 85 of the pivoting member main body 80 is along the movement plane of the operating part K1.
That is, the operation part K1 (α in FIG. 3) housed in the closed storage opening 91 and the operation part K1 (β in FIG. 3) housed in the open storage opening 92 are restricted from moving between each other by the movement restricting protrusion 93. For the operation part K1 to move from the closed storage opening 91 to the open storage opening 92, or from the open storage opening 92 to the closed storage opening 91, the angular position of the turning member main body 80 around the tube axis P is moved from an angular position (γ in FIG. 4) where the second flat plate part 85 is located on the movement plane between the closed posture and the open posture of the operation part K1 to an angular position (e.g., δ in FIG. 4) where the second flat plate part 85 is out of the movement plane between the closed posture and the open posture of the operation part K1.
Incidentally, one rotating member body 80 according to the second embodiment has a plurality of apertures 90 (two in the second embodiment) each of which is composed of a closed storage aperture portion 91 and an open storage aperture portion 92 .

[Another embodiment]

(1) In the above embodiment, a configuration example is shown in which a plurality of (two) gas cock position change limiting mechanisms 100 are provided for one gas cooker 50.
As another configuration example, a configuration in which one gas cock position change limiting mechanism 100 is provided for one gas cooker 50, or a configuration in which three or more gas cock position change limiting mechanisms 100 are provided for one gas cooker 50 may be adopted.

(2) In the first embodiment, it is determined whether the operating portion K1 of the gas cock K is in the open position or the closed position based on the angle of the straight pipe portion G1 of the rotating member main body 80 about the pipe axis P.
As another example of the configuration, as shown in Fig. 5, the rotating member main body 80 has a surface area Ha visible to the user in the closed state and a back surface area Hb visible to the user in the open state, the surface area Ha and the back surface area Hb are provided so that they can be individually directed toward the user as the rotating member main body 80 rotates around the tube axis P, and a visual enhancement part H having a visual enhancement effect may be provided on either the surface area Ha or the back surface area Hb (the back surface area Hb in Fig. 5). In the example shown in Fig. 5, one side surface of the first flat plate part 81 is the surface area Ha, and the other side surface is the back surface area Hb, and the visual enhancement part H is attached to the first flat plate part 81 by adhesive or the like. An example of the visual enhancement part H is a fluorescent reflector, but fluorescent paint or the like can also be used.

(3) In the above first embodiment, as the abutment state maintaining portion, a locking portion 83 that engages with the operating portion K1 in the closed state is provided on the tip side of the abutment portion 82 in the abutment direction around the tube axis P of the rotating member main body 80. In this example, with respect to the rotating member main body 80 in its natural state that is not elastically deformed, when viewed in the tube axial direction from the direction along the tube axis P, the distance between the tube axis P and the locking portion 83 (L1 in the left side of FIG. 2) is longer than the distance between the tube axis P and the operating portion K1 in the closed position (the operating portion K1 that is closest to the tube axis P in the axial direction of the tube axis P) (L2 in the left side of FIG. 2).
As another example of the abutment state maintaining portion, as shown in Fig. 6, when the operating portion K1 moves in the opening direction from the closed position to the open position while the rotating member body 80 is in abutment with the operating portion K1 of the gas cock K, a coil spring S (an example of a biasing member) may be provided to bias the rotating member body 80 around the straight pipe portion G1 of the gas main pipe G in the direction opposite to the opening direction. It is preferable that the coil spring S is provided such that one end is fixed to the straight pipe portion G1 and the other end abuts against the rotating member body 80.
In addition, the rotating member main body 80 may be made by cutting and bending a single flat plate as shown in the first embodiment, or may be made of a rod-shaped member 88 bent into a shape that fits around the straight pipe section G1, as shown in Figure 6, and a flat plate member 87 connected to the tip of the rod-shaped member 88 by welding or the like and abutting the operating part K1 of the gas cock K. Various configurations can be adopted.

(4) In the embodiments described so far, the direction of rotation of the operating part K1 of the gas cock K has been described as being along a horizontal plane along the arrows Y and X on the paper surface. However, for example, as shown in FIG. 7, even if the direction of rotation of the operating part K1 of the gas cock K is along a vertical plane along the arrow Z on the paper surface, changes in its position can be effectively restricted.
In the alternative embodiment (4), for example, as shown in FIG. 7, the abutment portion 82 of the rotating member body 80 is pressed downward in the vertical direction around the pipe axis P of the straight pipe section G1 when the operating portion K1 of the gas cock K moves in the opening direction from the closed position to the open position. Therefore, as in the alternative embodiment (3), it is preferable to adopt a configuration in which a coil spring S is provided that urges the rotating member body 80 in the direction opposite to the opening direction around the straight pipe section G1 of the gas main pipe G.

The configurations disclosed in the above embodiment (including other embodiments, the same applies below) can be applied in combination with configurations disclosed in other embodiments, provided no contradictions arise. Furthermore, the embodiments disclosed in this specification are merely examples, and the present invention is not limited to these embodiments. Appropriate modifications can be made without departing from the scope of the present invention.

The gas cock position change limiting mechanism of the present invention and the gas cooker equipped with the same can be effectively used as a gas cock position change limiting mechanism that can prevent the operating part of the gas cock of a gas cooker that is not in use from unintentionally changing from the closed position to the open position, and as a gas cooker equipped with the same.

50: Gas cooker 51a: First burner 51b: Second burner 70: Gas cooker body 70s: Side surface 80: Rotating member body 82: Contact portion 83: Locking portion 85: Second flat plate portion 90: Aperture 91: Closed storage aperture portion 92: Open storage aperture portion 93: Movement restricting protrusion portion 100: Gas cock position change limiting mechanism G: Gas main pipe G1: First straight pipe portion G2: Second straight pipe portion G3: Gas supply branch pipe H: Visual emphasis portion Ha: Surface portion Hb: Back portion K: Gas cock K1: Operation portion P: Pipe axis S: Coil spring

Claims (9)

A gas cock position change limiting mechanism for a gas cooker, comprising a gas main pipe having a straight pipe portion that is provided along the outer side of the user side of the gas cooker body when in use, and a gas cock that adjusts the flow rate of gas flowing through a gas supply branch pipe that supplies gas from the gas main pipe to a gas use part,
A gas cock position change limiting mechanism having a rotating member body that is freely rotatable around the pipe axis of the straight pipe section of the gas main pipe, and configured so that the rotating member body can be switched between a closed maintaining state in which the operating part of the gas cock is maintained in a closed position and an open allowing state in which the operating part is allowed to be in an open position through rotation of the rotating member body around the pipe axis. 2. The gas cock position change limiting mechanism according to claim 1, further comprising: an abutment portion that rotates integrally with the rotating member main body and abuts against the operating portion, which is in the closed position in the closed maintained state, from the position change direction side in a contact direction that is opposite to the position change direction of the operating portion from the closed position to the open position, and an abutment state maintaining portion that maintains the abutment state of the abutment portion against the operating portion. the abutment portion is provided on a tip side of the rotating member body around the tube axis and in the abutment direction, and has a recessed shape that follows an outer shape of the operation portion in the closed posture in the closed state,
the abutment state maintaining portion is a locking portion that is configured to lock with the operation portion in the closed state around the tube axis of the rotating member main body and on a tip side of the abutment portion in the abutment direction,
3. The gas cock position change limiting mechanism according to claim 2, wherein when viewed in the tube axis direction from a direction along the tube axis, a distance between the tube axis and the locking portion is longer than a distance between the tube axis and the operating portion in the closed position. 3. The gas cock position change limiting mechanism according to claim 2 , wherein the abutment state maintaining portion is a biasing member that biases the rotating member body in the abutment direction. the rotating member body has a surface portion visible to the user in the closed state and a back surface portion visible to the user in the open state, the surface portion and the back surface portion being disposed so as to be capable of being individually directed toward the user as the rotating member body rotates about the tube axis,
5. The gas cock position change limiting mechanism according to claim 1, wherein a visual emphasizing portion having a visual emphasizing effect is provided on either the front surface portion or the back surface portion. A gas cock position change restriction mechanism according to any one of claims 1 to 5, wherein the rotating member body is set at an angular position around the tube axis in the closed state and an angular position around the tube axis in the open state that are different. the rotating member body includes a flat plate portion that is aligned along a moving plane of the operation unit between the closed posture and the open posture in both the closed state and the open permitted state,
2. The gas cock position change limiting mechanism according to claim 1, wherein the flat plate portion is provided with a closed storage aperture portion for storing the operating portion in the closed position, and an open storage aperture portion capable of storing the operating portion in all of the open positions. The closed storage aperture portion and the open storage aperture portion are formed as a single continuous aperture,
A gas cock attitude change limiting mechanism as described in claim 7, wherein a movement limiting protrusion is provided between the closed storage opening and the open storage opening, which limits the movement of the operating part when the flat portion of the pivoting member main body is positioned along the movement plane of the operating part. A gas cooker equipped with a gas cock position change limiting mechanism according to any one of claims 1 to 8.

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