JP7189601B2 - gas cooker - Google Patents

Description

The present invention relates to a gas rice cooker.

A combustion rice cooker comprising a casing having a kettle mounting portion into which a rice cooker is detachably inserted, and a burner mounted in the casing to heat the rice cooking pot mounted in the kettle mounting portion. is known (see, for example, Patent Document 1). The casing consists of a cylindrical housing composed of an outer frame and a lower frame, and an inner body inserted into the inner side of the outer frame with a gap in a state where the upper end portion of the space between the outer frame and itself is closed. consists of Casings are generally made of metal due to heat resistance issues, but there is a need to make at least the resin casing, which is visible to the consumer, in order to reduce weight and increase the degree of freedom in design. .

JP-A-2000-350657

In a gas rice cooker, since rice is cooked by gas combustion, it is necessary to exhaust combustion exhaust from the burner to the outside. In the rice cooker, combustion exhaust that has passed through the gap between the upper end of the inner pot and the upper end of the inner barrel is discharged to the outside through the exhaust port provided on the side surface of the housing. In this configuration, the area around the exhaust port is heated because the combustion exhaust comes into contact with the area around the exhaust port. In particular, when the housing is made of resin, there is a possibility that the periphery of the exhaust port will be overheated and discolored, impairing the appearance.

SUMMARY OF THE INVENTION An object of the present invention is to provide a gas rice cooker capable of preventing discoloration of the housing due to heat of combustion exhaust even when the housing is made of resin.

The gas rice cooker according to claim 1 comprises a burner and a bottomed cylindrical shape, the flame port of the burner facing the inside of an opening provided in the bottom, and an inner pot supported above the burner. and a support that surrounds the inner pot, and a housing that accommodates the burner and the support inside, wherein the inner pot filled with water and rice is supported by the support, and the housing is A gas rice cooker in which a lid provided on a body is closed, the burner is burned, and combustion exhaust of the burner is passed through a space between the inner pot and the support to cook rice, wherein the housing is made of resin. and the support has a flange portion protruding radially outward from the upper end portion, and the flange portion is an exhaust for discharging combustion exhaust generated by combustion of the burner to the outside. a passage portion, the discharge passage portion being exposed to the outside of the housing and facing outward; and an exhaust port for discharging in the direction.

In the upper part of the housing of the gas rice cooker according to claim 2, a notch is formed at a position corresponding to the outer peripheral surface of the discharge path part in a state in which the support is arranged inside the housing. It is preferable that the housing is provided with a concave portion that exposes the outer peripheral surface to the outside of the housing by arranging the outer peripheral surface on the inner side with a gap on the lower side.

A metal heat insulating cylinder disposed between the housing and the support of the gas rice cooker of claim 3 and surrounding the support, and provided between the heat insulating cylinder and the housing, an air path through which air passes from the lower side to the upper side by a draft force generated by combustion of the burner, and the air that has passed through the air path is knitted radially outward by the lower surface of the flange, It is preferable that the liquid is discharged to the outside through the gap.

The shape of the outer peripheral surface of the discharge path portion of the gas rice cooker according to claim 4 is preferably the same as the shape of the outer surface of the housing provided with the recess.

In the gas rice cooker according to claim 5, a cross section perpendicular to the circumferential direction is formed in a concave shape on the upper surface of the flange portion, and a receiving portion for receiving water droplets generated during rice cooking is provided in the circumferential direction. The wall portion formed on the outer peripheral portion of the wall portions on both sides is formed in a downwardly concave shape. A guiding portion may be provided for guiding water droplets accumulated in the portion to the outer peripheral surface side.

According to the gas rice cooker of claim 1, the flange portion of the support is provided with the discharge passage portion, and the outer peripheral surface formed with the exhaust port, which is the outlet of the discharge passage portion, is exposed to the outside of the housing. is doing. As a result, the combustion exhaust flows outward in the exhaust passage and is discharged outward through the exhaust port. Therefore, the heat of the combustion exhaust can be prevented from coming into direct contact with the housing, so even if the housing is made of resin, the possibility of discoloration of the housing due to heat can be reduced.

According to the gas rice cooker of claim 2, since a gap is formed between the lower side of the outer peripheral surface of the exhaust path portion of the flange and the recessed portion, the outer peripheral surface of the exhaust path portion and the recessed portion are in direct contact. do not do. As a result, the possibility of discoloration of the concave portion due to the heat of the exhaust passage portion can be reduced.

According to the gas rice cooker of claim 3, the air that has passed through the air path passes through the gap between the lower side of the outer peripheral surface of the exhaust path and the recess on the lower side of the exhaust port through which the combustion exhaust is discharged. discharged to Thereby, the gas rice cooker can more effectively prevent combustion exhaust from directly contacting the concave portion of the housing.

According to the gas rice cooker of claim 4, it is possible to improve the appearance around the recess on the outer surface of the housing.

According to the gas rice cooker of claim 5, water droplets adhering to the back surface of the lid during rice cooking fall onto the receiving portion formed on the upper surface of the collar portion of the support. The gas rice cooker can guide the water droplets accumulated in the receiving part to the outer peripheral surface side of the exhaust path where combustion is not affected by the guide part.

The inventions of claims 1 to 5 described above can be combined arbitrarily. For example, the configuration of at least one of claims 2 to 5 may be provided without all or part of claim 1. However, in particular, it is preferable that the configuration of claim 1 is provided and at least one configuration and combination of claims 2 to 5 are provided. Also, arbitrary components of claims 1 to 5 may be extracted and combined. The applicant of the present application intends to obtain patent rights for such configurations as well.

1 is a perspective view of a gas rice cooker 1; FIG. 1 is a front view of gas rice cooker 1. FIG. Fig. 3 is a right side view of the gas rice cooker 1; 1 is a perspective view of gas rice cooker 1 with lid 3 open. FIG. FIG. 3 is a cross-sectional view taken along line II shown in FIG. 2; 4 is a cross-sectional view taken along line II-II shown in FIG. 3; FIG. 3 is an exploded perspective view of an upper housing 8; FIG. 4 is a cross-sectional view of the upper housing 8 taken along line II-II shown in FIG. 3; FIG. 3 is an exploded perspective view of a lower housing 7, a ring-shaped plate member 50, an outer heat shield tube 60, an inner heat shield tube 70, and a support tube 80. FIG. 6 is a partially enlarged view of the W1 area shown in FIG. 5; FIG. 7 is a partially enlarged view of the W2 area shown in FIG. 6; FIG.

Embodiments of the present invention will be described below. Unless otherwise specified, the structures and the like of the devices described below are merely illustrative examples and are not intended to be limiting. The drawings are used to explain technical features that can be employed by the present invention. In the following description, left and right, front and rear, and top and bottom indicated by arrows in the drawings are used.

The external structure of the gas rice cooker 1 will be described with reference to FIGS. 1 to 9. FIG. As shown in FIGS. 1 to 3, the gas rice cooker 1 includes a housing 2 and a lid 3. As shown in FIGS. The housing 2 is formed in a bottomed substantially cylindrical shape that opens upward. The housing 2 includes a lower housing 7 and an upper housing 8, both of which are molded resin products.

The lower housing 7 is formed in a substantially cylindrical shape with a bottom, and an operation panel 175 is provided on the front surface. A burner 10 (see FIG. 5) is housed in a substantially central portion inside the lower housing 7 . A through hole 16 is provided in the rear portion of the right side surface of the lower housing 7 . A gas supply pipe 19 protrudes rearward from the through hole 16 . A gas hose (not shown) is connected to the gas supply pipe 19 . A plurality of legs 177 are provided on the bottom of the lower housing 7 .

The upper housing 8 is formed in a substantially cylindrical shape extending in the vertical direction, and is coaxially attached to the upper portion of the lower housing 7 . An inner pot 9 (see FIG. 5) is accommodated inside the upper housing 8 and supported directly above the burner 10 . The inner pot 9 accommodates rice and water. A cutout portion 125 having a rectangular shape in a side view is provided at the upper end portion of each of the right side portion and the left side portion of the upper housing 8 . A portion of an outer peripheral surface portion 84 of a flange portion 82 of the support cylinder 80, which will be described later, is arranged inside the notch portion 125 and exposed to the outside. A pair of exhaust ports 841 are arranged in the portion exposed to the right side, and a pair of exhaust ports 842 (see FIG. 2) are provided in the portion exposed to the left side. Combustion exhaust from the burner 10 is discharged outside through these exhaust ports 841 and 842 . A handle 5 having a substantially semicircular arc shape is rotatably supported on the upper portions of both left and right sides of the upper housing 8 .

The lid body 3 is formed in a substantially circular shape in plan view, and its outer shell portion is made of resin. The lid body 3 has a rear projection 301 at the rear and a front projection 302 at the front. The rear projecting portion 301 is formed in a substantially rectangular shape in plan view and projects rearward from the rear portion of the lid body 3 , and is rotatably supported by the rear end portion of the upper portion of the upper housing 8 . Thereby, the lid 3 can open and close the upper opening of the upper housing 8 (see FIGS. 1 and 4). The forward protruding portion 302 is formed in a generally rectangular shape in plan view, protruding forward from the front portion of the lid 3 . An engaging portion 303 is provided at substantially the central portion of the forward protruding portion 302 in the left-right direction. The engaging portion 303 engages with a later-described projection 112 (see FIG. 4) provided on the front upper portion of the upper housing 8 . When the engaging portion 303 is pushed down, the engagement with the projection 112 is released, and the cover 3 is pushed upward by a spring 308 which will be described later. An inner lid 6 (see FIG. 4) is attached to the lower surface of the lid 3 . When the lid body 3 is closed with respect to the upper housing 8, the inner lid 6 can seal the open upper portion of the inner pot 9. - 特許庁

The external structure of the lower housing 7 will be specifically described with reference to FIGS. 1 to 4. FIG. The right side wall and the left side wall of the lower housing 7 are provided with a curved portion 171, a front protruding portion 172, and a rear protruding portion 173, respectively. The curved portions 171 are formed in the center portions of the right and left sidewalls in the front-rear direction, respectively, and gently curve outward in a substantially circular arc shape. The front projecting portion 172 linearly extends forward from the front end portion of the curved portion 171 . The rear protruding portion 173 linearly extends rearward from the rear end portion of the curved portion 171 . The rear wall of the lower housing 7 is connected between the respective rear ends of the right and left walls. A substantially rectangular opening 174 is formed on the front side of the lower housing 7 . An operation panel 175 is attached to the opening 174 . The operation panel 175 slopes downward from top to bottom with respect to the front. Thereby, the visibility and operability of the operation panel 175 can be improved.

The through hole 16 is provided in the rear portion of the curved portion 171 on the right side surface of the lower housing 7 and opens rearward in a substantially circular shape. The gas supply pipe 19 protrudes substantially linearly rearward from the inside of the lower housing 7 through the through hole 16 . As a result, as shown in FIG. 3, when the housing 2 is viewed from the right side, the gas supply pipe 19 protruding rearward from the through-hole 16 is positioned at the rear protrusion 173 of the lower housing 7 protruding rearward. overlap with Further, as shown in FIG. 2, when the housing 2 is viewed from the front, the gas supply pipe 19 is hidden by the curved portion 171 of the lower housing 7 and cannot be seen. As a result, in the gas rice cooker 1, the gas supply pipe 19 can be made inconspicuous, and the gas supply pipe 19 is less likely to be caught by an obstacle.

The structure of the upper housing 8 will be specifically described with reference to FIGS. 7 and 8. FIG. As shown in FIG. 7, the upper housing 8 is formed into a substantially cylindrical shape extending vertically by assembling four resin-molded products including a front plate 11, a right plate 12, a left plate 13, and a rear plate 14. Configured. Since the upper housing 8 is made of resin molding, it can be made lighter than a metal housing.

The front side plate member 11 is formed in a vertically long substantially rectangular shape when viewed from the front. An upper end portion of the front plate member 11 is provided with an upper surface portion 111 projecting substantially horizontally rearward. The rear end portion of the upper surface portion 111 curves forward in a substantially arc shape corresponding to the shape of the outer peripheral surface of the support cylinder 80 described later. A protrusion 112 that protrudes upward is provided at a substantially central portion of the upper surface of the upper surface portion 111 . The engaging portion 303 of the lid 3 is engaged with the protrusion 112 from above. A pair of fitting portions 113 are provided at the right and left ends of the lower surface of the upper surface portion 111 (see FIG. 8). Each fitting portion 113 protrudes downward. A pair of contact portions 115 are provided on the lower surface of the upper surface portion 111 . The pair of contact portions 115 are generally L-shaped when viewed from the side, and are separated from each other in the left and right direction. A pair of fitting portions 114 are provided at the lower right portion and the lower left portion of the rear surface of the front plate member 11 . Each fitting portion 114 protrudes downward. A ridge portion 31 is provided on the upper right portion of the rear surface of the front side plate member 11, and a ridge portion 32 is provided below it. The ridges 31 and 32 are formed in straight lines extending in the vertical direction. A ridge portion 33 is provided on the upper left portion of the rear surface of the front side plate 11, and a ridge portion 34 is provided below it. The ridges 33 and 34 are also formed linearly extending in the vertical direction.

The rear plate member 14 has a front-rear substantially symmetrical shape with the front plate member 11 . The rear side plate member 14 is formed in a substantially vertically long rectangular shape when viewed from the rear. An upper end portion of the rear plate member 14 is provided with an upper surface portion 141 projecting substantially horizontally forward. The front end portion of the upper surface portion 141 is curved rearward in a substantially arc shape corresponding to the shape of the outer peripheral surface of the support tube 80 described later. A rotation shaft support portion 142 is provided on the upper surface of the upper surface portion 141 . The rotary shaft support portion 142 is formed in a substantially half-cylindrical cross section extending in the left-right direction, and a rotary shaft 307 (see FIG. 5) is attached to the inner side thereof. The rear protruding portion 301 of the lid 3 is rotatably supported on the rotating shaft 307 . A spring 308 (see FIG. 5) is provided so as to surround the rotation shaft 307 . The spring 308 always urges the lid 3 upward.

A pair of fitting portions 143 are provided at the right and left ends of the lower surface of the upper surface portion 141 . Each fitting portion 143 protrudes downward. A pair of contact portions 145 are provided on the lower surface of the upper surface portion 141 . The pair of contact portions 145 are generally L-shaped when viewed from the side, and are spaced apart from each other in the left and right direction. A pair of fitting portions 144 are provided at the lower right portion and the lower left portion of the front surface of the rear plate member 14 . Each fitting portion 144 protrudes downward. A ridge portion 35 is provided on the upper right portion of the front surface of the rear plate member 14, and a ridge portion 36 is provided below it. The ridges 35 and 36 are formed in straight lines extending in the vertical direction. A ridge portion 37 is provided on the upper left portion of the front surface of the rear plate member 14, and a ridge portion 38 is provided below it. The ridges 37 and 38 are formed in straight lines extending in the vertical direction.

A handle locking portion 101 (see FIG. 3) is provided on the upper portion of the rear surface of the rear plate member 14 . The handle locking portion 101 is a plate-like portion projecting substantially horizontally rearward. The handle 5 rotated backward can be placed on the upper surface of the handle locking portion 101 . As a result, the handle 5 rotated backward does not come into contact with the rear surface of the rear plate member 14 and is supported substantially horizontally, so that the user can easily grasp the handle 5 .

The right plate member 12 is formed in a substantially rectangular shape elongated in the front-rear direction when viewed from the right side. The right plate member 12 includes a curved portion 121 , a front flat portion 122 and a rear flat portion 123 . The curved portion 121 is formed in the central portion of the right plate member 12 in the front-rear direction, and gently curves toward the right side in plan view into a substantially arc shape. The front flat portion 122 extends substantially linearly forward from the front end portion of the curved portion 121 . The rear flat portion 123 extends substantially linearly rearward from the rear end portion of the curved portion 121 . The shapes of the curved portion 121, the front flat portion 122, and the rear flat portion 123 correspond to the shapes of the curved portion 171, the front protruding portion 172, and the rear protruding portion 173 of the lower housing 7, respectively.

The upper end of the curved portion 121 is lower than the upper end of each of the front flat portion 122 and the rear flat portion 123 . Therefore, the cutout portion 125 is formed by the upper end portion of the curved portion 121 , the rear end portion of the upper portion of the front flat portion 122 , and the front end portion of the upper portion of the rear flat portion 123 . The notch 125 is formed in a substantially U-shape that opens upward in a right side view. A rib 128 protruding radially inward is provided at the upper end of the curved portion 121 . A pair of fixing portions 129 are provided at positions spaced apart in the front-rear direction on the lower portion of the inner surface of the curved portion 121 . The fixed portion 129 protrudes substantially horizontally inward, and is provided with a vertically penetrating hole (not shown) in its central portion. An insertion piece 127 is provided along the lower end of the curved portion 121 . The insertion piece 127 protrudes downward. A handle hole portion 17 is provided in the vicinity of the upper end portion of the curved portion 121 and substantially at the center in the front-rear direction. One end of the handle 5 is rotatably supported in the handle hole 17 .

The front engaging portion 21 is provided on the inner surface (leftward surface) of the front planar portion 122 along the front end side of the inner surface. The front engaging portion 21 has a rib-shaped base projecting leftward, and has a pair of hook-shaped portions 211 and 212 on the upper and lower portions of the base. The hook-shaped portions 211 and 212 further protrude leftward from the base portion of the front engaging portion 21, and are formed in a generally L-shape when viewed from the rear such that the protruding tip side thereof is bent upward. Therefore, inside the hook-shaped portions 211 and 212, grooves extending downward are formed.

An inserted portion 251 and a fixing portion 271 projecting leftward are provided on the front lower portion of the inner surface of the front flat portion 122 . The fitted part 251 has a plate-like part that protrudes substantially horizontally to the left, and has a vertically penetrating hole (not shown) in the center thereof. The fixing portion 271 is provided so as to be adjacent to the rear portion of the inserted portion 251 . The fixing portion 271 has a plate-like portion that extends substantially horizontally leftward from the inner surface of the front flat portion 122, and has a hole (not shown) penetrating in the vertical direction on the tip side thereof. An inserted portion 261 (see FIG. 8) is provided above the inner surface of the front flat portion 122 and behind the front engaging portion 21 . The fitted part 261 has a plate-like part that protrudes substantially horizontally to the left, and has a vertically penetrating hole (not shown) in the center thereof.

Although not described in detail, the inner surface of the rear flat portion 123 also has a rear engaging portion 22, a fitted portion 252, a fixed portion 272, and a fitted portion 262 which are symmetrical in the front-rear direction with respect to each portion of the front flat portion 122. are provided respectively (see FIG. 7). A pair of hook-shaped portions 221 and 222 are provided on the rear engaging portion 22 .

The left plate member 13 is substantially symmetrical to the right plate member 12, so it will be briefly described. The left plate member 13 also includes a curved portion 131 , a front flat portion 132 , and a rear flat portion 133 similarly to the right plate member 12 . A notch 135 (see FIG. 2) is formed by the upper end of the curved portion 131 , the upper rear end of the front flat portion 132 , and the upper front end of the rear flat portion 133 . A rib 138 protruding radially inward is provided at the upper end of the curved portion 131 . A pair of fixing portions 139 are provided at positions spaced apart in the front-rear direction on the lower portion of the inner surface of the curved portion 131 . The fixed portion 139 protrudes substantially horizontally inward, and has a vertically penetrating hole (not shown) in its central portion. An insertion piece 137 is provided along the lower end of the curved portion 131 . A handle hole portion 18 is provided in the vicinity of the upper end portion of the curved portion 131 and substantially at the center in the front-rear direction. The other end of the handle 5 is rotatably supported in the handle hole 18 .

The front engaging portion 23 is provided on the inner surface (surface facing rightward) of the front flat portion 132 along the front end side of the inner surface. The front engaging portion 23 has a rib-shaped base projecting rightward, and has a pair of hook-shaped portions 231 and 232 on the upper and lower portions of the base. The hook-shaped portions 231 and 232 further project to the right from the base portion of the front engaging portion 23, and are formed in a substantially L shape in a rear view in which the projecting tip side is bent upward. Therefore, inside the hook-shaped portions 231 and 232, grooves extending downward are formed.

An inserted portion 253 and a fixing portion 273 projecting leftward are provided at the lower front end side of the inner surface of the front flat portion 132 . The fitted part 253 has a plate-like part that protrudes substantially horizontally to the right, and has a vertically penetrating hole (not shown) in the center thereof. The fixing portion 273 is provided so as to be adjacent to the rear portion of the inserted portion 253 . The fixing portion 273 has a plate-like portion extending substantially horizontally to the right from the inner surface of the front flat portion 132, and has a hole 273A penetrating in the vertical direction on the tip side thereof. An inserted portion 263 is provided above the inner surface of the front flat portion 122 and behind the front engaging portion 23 . The fitted portion 263 has a plate-like portion that protrudes substantially horizontally to the right, and has a vertically penetrating hole (not shown) in the center thereof.

Although not described in detail, the inner surface of the rear flat portion 133 also has a rear engaging portion 24, a fitted portion 254, a fixed portion 274, and a fitted portion 264 which are symmetrical in the front-rear direction with respect to each portion of the front flat portion 132. provided (see FIG. 7). A pair of hook-shaped portions 241 and 242 are provided on the rear engaging portion 24 . The fixed portion 274 is provided with a hole 274A.

An example of a method of assembling the front plate 11, the right plate 12, the left plate 13, and the rear plate 14 will be described with reference to FIGS. First, the worker erects the right side plate 12 and the left side plate 13 on both left and right sides and arranges them so as to face each other. In order to connect the front side plate 11 and the right side plate 12, the right side of the rear surface of the front side plate 11 is inserted into each of the grooves of the hook-shaped portions 211 and 212 of the front engaging portion 21 provided in the front flat portion 122 of the right side plate 12. The ridges 31 and 32 (see FIG. 8) are inserted downward from above. At this time, the fitting portion 113 provided at the right end of the lower surface of the upper surface portion 111 of the front plate 11 is fitted from above into the hole of the fitting portion 261 provided at the upper inner surface of the front flat portion 122 of the right plate 12. Further, the fitting portion 114 provided at the lower right portion of the rear surface of the front side plate member 11 is fitted from above into the hole of the fitted portion 251 provided at the lower inner surface of the front flat portion 122 of the right side plate member 12 . As a result, the front plate member 11 and the right plate member 12 are firmly connected to each other.

Furthermore, in order to connect the front side plate 11 and the left side plate 13, the rear surface of the front side plate 11 is attached to each of the grooves of the hook-shaped portions 231 and 232 of the front engaging portion 23 provided in the front flat portion 132 of the left side plate 13. The left protrusions 33 and 34 (see FIG. 8) are inserted downward from above. At this time, the insertion portion 113 provided at the left end of the lower surface of the upper surface portion 111 of the front side plate 11 is inserted from above into the hole of the inserted portion 263 provided at the upper inner surface of the front flat portion 132 of the left side plate 13. Further, the fitting portion 114 provided on the lower left rear surface of the front side plate member 11 is fitted from above into the hole of the fitted portion 253 provided on the lower inner surface of the front flat portion 132 of the left side plate member 13 . As a result, the front plate member 11 and the left plate member 13 are firmly connected to each other.

Furthermore, in order to connect the rear side plate 14 and the right side plate 12, the grooves of the hook-shaped portions 221 and 222 of the rear side engaging portion 22 provided on the rear side flat portion 123 of the right side plate 12 are attached to the rear side. The protrusions 35 and 36 on the front right side of the plate member 14 are inserted downward from above. At this time, the fitting portion 143 provided on the right end portion of the lower surface of the upper surface portion 141 of the rear plate member 14 is fitted from above into the hole of the fitting portion 262 provided on the upper inner surface of the rear flat portion 123 of the right plate member 12 . . Further, the fitting portion 144 provided at the lower right portion of the front surface of the rear plate member 14 is fitted from above into the hole of the fitting portion 252 provided at the lower inner surface of the rear flat portion 123 of the right plate member 12 . As a result, the rear plate member 14 and the right plate member 12 are firmly connected to each other.

Furthermore, in order to connect the rear side plate 14 and the left side plate 13, the grooves of the hook-shaped portions 241 and 242 of the rear side engagement portion 24 provided on the rear side flat portion 133 of the left side plate 13 are moved to the rear side. The protrusions 37 and 38 on the front left side of the plate member 14 are inserted downward from above. At this time, the fitting portion 143 provided at the left end portion of the lower surface of the upper surface portion 141 of the rear plate member 14 is fitted from above into the hole of the fitting portion 264 provided at the upper inner surface of the rear flat portion 133 of the left plate member 13 . . Further, the fitting portion 144 provided on the lower left front surface of the rear plate member 14 is fitted from above into the hole of the inserted portion 254 provided on the lower inner surface of the rear flat portion 133 of the left plate member 13 . As a result, the rear plate member 14 and the left plate member 13 are firmly connected to each other.

In this manner, the upper housing 8 is configured by firmly connecting the front side plate member 11, the right side plate member 12, the left side plate member 13, and the rear side plate member 14 to each other. As described above, with respect to the hook-like portions 211 and 212 of the front engaging portion 21 of the right side plate 12 and the hook-like portions 231 and 232 of the front engaging portion 23 of the left side plate 13, the right protrusion portion of the front side plate 11 31, 32 and left ribs 33, 34 can be inserted simultaneously from above. Further, the right protrusion of the rear plate member 14 is attached to the hook-shaped portions 221 and 222 of the rear engagement portion 22 of the right plate member 12 and the hook-shaped portions 241 and 242 of the rear engagement portion 24 of the left plate member 13 . The portions 35 and 36 and the left rib portions 37 and 38 can be inserted simultaneously from above. This facilitates assembly of the upper housing 8 .

The internal structure of the lower housing 7 will be specifically described with reference to FIG. As described above, the lower housing 7 is formed in a substantially cylindrical shape with an open top. Inside the lower housing 7 are a support base 41, a burner 10, a gas amount adjusting device 40, a temperature sensor 42, an igniter electrode 44, a thermocouple 45, four first fixed cylindrical portions 47, and four locking projections. 48 (only two are shown in FIG. 9), three second fixed cylindrical portions 49 (only one is shown in FIG. 9), a ring-shaped plate member 50, and the like are provided.

The support base 41 is made of metal and formed in a plate shape having a substantially horizontal surface, and is supported at a position spaced upward from the upper surface of the bottom portion of the lower housing 7 . The gas amount adjusting device 40 is fixed to the lower side of the support base 41 . A gas supply pipe 19 is connected to the gas amount adjusting device 40 via a gas pipe (not shown). A control device (not shown) that controls the operation of the gas rice cooker 1 based on the operation of the operation panel 175 is fixed to the support base 41 . The gas amount adjusting device 40 adjusts the amount of gas supplied to the burner 10 based on the control signal from the control device.

The burner 10 has a ring-shaped burner head 10A on its upper portion, and is fixed to an opening (not shown) provided substantially in the center of the support base 41 so as to be vertically inserted therethrough. The temperature sensor 42 is supported inside the burner head 10A so as to be vertically retractable. The temperature sensor 42 is constantly urged upward by a spring (not shown) and can come into contact with the bottom of the inner pot 9 . The temperature sensor 42 is surrounded by a cylindrical cover 42A. The igniter electrode 44 and the thermocouple 45 are fixed to the support base 41 and supported near the burner head 10A. The igniter electrode 44 ignites the burner 10 by generating spark discharge according to a control signal from the control device. Thermocouple 45 detects misfire of burner 10 and outputs a detection signal to the control device.

The four first fixed cylindrical portions 47 are arranged at one point near the front end of the curved portion 171 on the right side wall of the lower housing 7, one point near the front end of the curved portion 171 on the left side wall, and both left and right ends of the rear wall. They are erected at two locations near each other. The four first fixed cylinder portions 47 are integrally molded with the lower housing 7 . The first fixed cylinder part 47 is formed in a substantially cylindrical shape protruding upward from the upper surface of the bottom part of the lower housing 7, and a fixing hole (not shown) is formed inside the upper part of the first fixed cylinder part 47 . Each position of the four first fixed cylinder parts 47 corresponds to each position of the fixing parts 271 and 272 of the right plate member 12 and the fixing parts 273 and 274 of the left plate member 13 of the upper housing 8 . The fixing portions 271 and 272 of the right side plate member 12 and the fixing portions 273 and 274 of the left side plate member 13 of the upper housing 8 are fixed to the corresponding four first fixing cylinder portions 47 with screws (not shown).

Two locking projections 48 among the four locking projections 48 are located between the two first fixed cylindrical portions 47 located on the right side of the lower housing 7 and on the right side wall of the lower housing 7. It is erected near the inner surface. The remaining two locking projections 48 are erected near the inner surface of the left side wall of the lower housing 7 between the two first fixed cylindrical portions 47 located on the left side of the lower housing 7. . These four locking projections 48 are integrally molded with the lower housing 7 . The locking protrusion 48 is formed in a substantially columnar shape protruding upward from the upper surface of the bottom portion of the lower housing 7, and a gap is formed between the locking protrusion 48 and the upper end portion of the inner surface of each of the right side wall and the left side wall.

The three second fixed cylinders 49 are provided at equal intervals in the circumferential direction of a circle centered on the burner 10 at the bottom of the lower housing 7 and integrally molded with the lower housing 7 . The second fixed cylinder part 49 is formed in a substantially cylindrical shape protruding upward from the upper surface of the bottom part of the lower housing 7, and a fixing hole (not shown) is formed inside the upper part of the second fixed cylinder part 49 . The height of the second fixed tubular portion 49 is lower than the height of the first fixed tubular portion 47 .

The ring-shaped plate member 50 is made of metal and formed in a substantially ring shape in plan view, and is fixed to the lower housing 7 while being supported above the support base 41 . A circular opening 52 penetrating vertically is provided in the central portion of the ring-shaped plate member 50 . A burner head 10A of the burner 10 is inserted and arranged inside the opening 52 (see FIGS. 5 and 6). An outer engaging portion 53 is provided on the outer peripheral edge portion of the upper surface of the ring-shaped plate member 50 . The outer engaging portion 53 is formed along the outer peripheral edge of the ring-shaped plate member 50 and protrudes upward in a rib shape. An inner locking portion 54 is provided on the inner edge of the opening 52 . The inner engaging portion 54 is formed along the inner edge of the opening 52 and protrudes upward in a rib shape.

Three recessed portions 501 are provided at the outer peripheral edge portion of the ring-shaped plate member 50 at three locations spaced apart from each other at equal intervals. These three concave portions 501 are provided with substantially L-shaped fixing pieces 55 (only one is shown in FIG. 9). The fixed piece 55 hangs down from the recess 501 and bends outward at its lower end. A vertically penetrating hole 55A is formed in the outwardly bent lower end portion of the fixing piece 55 . The holes 55A of these three fixing pieces 55 correspond to the respective positions of the three second fixing cylinders 49 provided on the bottom of the lower housing 7, and are fixed with screws (see FIG. 5). As a result, the three fixing pieces 55 are fixed onto the three second fixing cylindrical portions 49 , so that the ring-shaped plate member 50 is fixed to the bottom of the lower housing 7 .

The ring-shaped plate member 50 is provided with three fixing holes 56 penetrating in the vertical direction at three locations that are equally spaced from each other in the circumferential direction. A support cylinder 80 is fixed to these three fixing holes 56 with screws. Further, two locking holes 57 are provided in the vicinity of the outer peripheral edge of the ring-shaped plate member 50 and at positions offset from each other in the circumferential direction. The two locking holes 57 are formed in a slit shape elongated in the circumferential direction. Furthermore, a ring-shaped thermal heater 58 is attached to the upper surface of the ring-shaped plate member 50 so as to be arranged along the outer surface of the inner locking portion 54 .

The internal structure of the upper housing 8 will be described with reference to FIG. Inside the upper housing 8, an outer heat shield tube 60, an inner heat shield tube 70, a support tube 80, and the like are coaxially accommodated.

The outer heat shield tube 60 is made of metal and has a substantially cylindrical shape extending in the vertical direction. The outer heat insulating cylinder 60 has a size corresponding to the outer peripheral edge of the ring-shaped plate member 50 . The outer heat insulating cylinder 60 is placed on the upper surface of the ring-shaped plate member 50 .

The inner heat shield tube 70 is also made of metal and formed in a substantially cylindrical shape with a diameter smaller than that of the outer heat shield tube 60 . The inner heat shield tube 70 is coaxially inserted inside the outer heat shield tube 60 . A pair of protruding portions 71 are provided at the upper end portion of the inner heat insulating tube 70 at the front side portion and the rear side portion facing each other. The pair of protrusions 71 each protrude upward in a generally rectangular shape. A pair of recessed portions 72 are provided between the pair of projecting portions 71 . The pair of recesses 72 are arranged to face the cutouts 125 and 135 of the upper housing 8 , respectively. Two locking protrusions 75 are provided at the lower end of the inner heat insulating tube 70 at positions spaced apart from each other. The locking projection 75 protrudes downward from the lower end in a substantially rectangular shape. The positions of the two locking protrusions 75 correspond to the positions of the two locking holes 57 provided in the ring-shaped plate member 50 .
The inner heat insulating cylinder 70 is also placed on the upper surface of the ring-shaped plate member 50 .

The support tube 80 is also made of metal and is formed in a substantially cylindrical shape with a flange extending in the vertical direction. The support tube 80 includes a tube portion 81 , a collar portion 82 and a bottom plate 89 . The tubular portion 81 is formed in a substantially tubular shape with a diameter smaller than that of the inner heat insulating tube 70 . A protruding portion (not shown) protruding radially inward is provided at the open lower end portion of the tubular portion 81 . The projecting portion is provided with three fixing holes (not shown) at equidistant positions in the circumferential direction. These three fixing holes correspond to the positions of the three fixing holes 56 of the ring-shaped plate member 50 .

The flange portion 82 is provided at the upper end portion of the cylindrical portion 81 and protrudes radially outward in a substantially flange shape. The collar portion 82 includes an upper surface portion 83 , an outer peripheral surface portion 84 and a lower surface portion 85 . The upper surface portion 83 protrudes radially outward from the upper end portion of the tubular portion 81 and has a generally ring shape in a plan view. The outer peripheral surface portion 84 hangs down from the outer peripheral portion of the upper surface portion 83 and forms the outer peripheral surface of the collar portion 82 . In the outer peripheral surface portion 84, a pair of recesses 86 (only the recesses 86 of the front side portion are shown in FIG. 9) are provided in the front side portion and the rear side portion of the outer peripheral surface portion 84 facing each other. . As a result, the outer peripheral surface portion 84 is divided into a right side portion 84A and a left side portion 84B. A pair of exhaust ports 841 are provided side by side in the circumferential direction on the right side portion 84A. A pair of exhaust ports 842 (see FIG. 2) are provided side by side in the circumferential direction on the left side portion 84B. The exhaust ports 841 and 842 are formed in a slit shape elongated in the circumferential direction. The exhaust ports 841 and 842 communicate with the inside of the collar portion 82 . The lower surface portion 85 protrudes radially inward from the lower end portion of the outer peripheral surface portion 84 (see FIG. 11).

A pair of left and right outflow ports 87 (only the outflow port 87 on the left side is shown in FIG. 9) penetrating in the radial direction and elongated in the circumferential direction are provided in the left and right portions of the upper portion of the cylindrical portion 81 . Each position of the pair of left and right outflow ports 87 corresponds to each position of the right side portion 84A and the left side portion 84B of the outer peripheral surface portion 84 . A blocking plate 88 is fixed with rivets near the lower edge of the outflow port 87 on the outer peripheral surface of the upper portion of the cylindrical portion 81 . The blocking plate 88 has a substantially inverted L-shaped cross section, and a portion protruding radially outward is arranged inside the flange portion 82 and directly above the lower surface portion 85 (see FIG. 11).

A receiving portion 831 and a pair of relief portions 832 are provided on the upper surface portion 83 of the flange portion 82 . The receiving portion 831 is formed to have a concave cross section along the circumferential direction of the upper surface portion 83 which is substantially ring-shaped in plan view, and can receive water droplets generated during the rice cooking process. The pair of relief portions 832 are provided at the circumferential center portions of the right side and the left side of the upper surface portion 83, respectively, and are formed by notching the rib-like outer peripheral portion of the upper surface portion 83 to form a substantially rectangular cutout. . A pair of relief portions 832 are connected to the receiving portion 831 . The relief portion 832 can guide water droplets accumulated in the receiving portion 831 to the outer peripheral surface portion 84 side of the flange portion 82 of the right side portion 84A and the left side portion 84B.

The bottom plate 89 is a substantially ring-shaped metal plate in plan view, and is fixed to the open bottom of the cylindrical portion 81 from the inside. An insertion hole 891 is provided in the central portion of the bottom plate 89 so as to penetrate vertically. The burner head 10A of the burner 10 is inserted into the insertion hole 891 from below. The upper surface of the bottom plate 89 is provided with a raised portion 892 having a substantially ring shape in plan view so as to surround the insertion hole 891 . The raised portion 892 is formed by pressing or the like so as to protrude upward like a mountain. The raised portion 892 corresponds to the position of the thermal heater 58 attached to the upper surface of the ring-shaped plate member 50 and accommodates the thermal heater 58 inside. The bottom plate 89 is provided with three fixing holes 893 at equal intervals in the circumferential direction. The three fixing holes 893 correspond to the positions of the three fixing holes 56 provided in the ring-shaped plate member 50 and the three fixing holes provided in the projecting portion at the lower end of the cylindrical portion 81 . The bottom plate 89 is fixed to the projecting portion of the cylindrical portion 81 with screws.

9 and 10, the support structure of the outer heat shield tube 60, the inner heat shield tube 70, and the support tube 80 will be described. The outer heat insulating tube 60 is installed on the upper surface of the ring-shaped plate member 50 fixed to the lower housing 7 . The inner edge portion of the outer locking portion 53 contacts the lower portion of the outer peripheral surface of the outer heat insulating tube 60 (see FIG. 10). As a result, the outer heat insulating tube 60 is positioned on the upper surface of the ring-shaped plate member 50 and can be prevented from being displaced in the radial direction. The inner heat shield tube 70 is inserted inside the outer heat shield tube 60 and installed on the upper surface of the ring-shaped plate member 50 . Two locking projections 75 provided at the lower end of the inner heat insulating tube 70 are locked into two locking holes 57 of the ring-shaped plate member 50, respectively. As a result, the inner heat insulating tube 70 is also positioned on the upper surface of the ring-shaped plate member 50, and can be prevented from being displaced in the radial direction (see FIG. 10). A predetermined gap is formed between the inner surface of the outer heat insulating tube 60 and the outer surface of the inner heat insulating tube 70 . The predetermined gap functions as an air insulation layer.

The support cylinder 80 is inserted inside the inner heat shield cylinder 70 and arranged on the upper surface of the ring-shaped plate member 50 . Three fixing holes 893 provided in the bottom plate 89 of the support tube 80 for the three fixing holes 56 provided in the ring-shaped plate member 50, and three fixing holes (not shown) provided in the projecting portion of the support tube 80 ) are positioned, and screws (not shown) are fastened from above the bottom plate 89 . Thereby, the support tube 80 is fixed to the upper surface of the ring-shaped plate member 50 via the bottom plate 89 . The burner head 10A, the temperature sensor 42, the igniter electrode 44, and the thermocouple 45 are inserted inside the insertion hole 851 of the bottom plate 89 (see FIG. 6). The thermal heater 58 is housed inside the raised portion 892 of the bottom plate 89 . Thereby, the thermal heater 58 can heat the inner pot 9 supported inside the support cylinder 80 via the bottom plate 89 .

The support tube 80 is surrounded by an outer heat shield tube 60 and an inner heat shield tube 70 (see FIG. 10). A pair of protruding portions 71 provided at the upper end of the inner heat insulating tube 70 are arranged inside a pair of front and rear recesses 86 provided in the outer peripheral surface portion 84 of the flange portion 82 of the support tube 80 (see FIG. 9). . As a result, the radiant heat from the support tube 80 can be prevented from being directly transferred to the upper portions of the front side plate member 11 and the rear side plate member 14 of the upper housing 8 . A pair of left and right recesses 72 provided at the upper end of the inner heat insulating tube 70 are arranged directly below the right side 84A and the left side 84B of the outer peripheral surface 84 of the flange 82, respectively. As a result, upward movement of the outer heat shield tube 60 and the inner heat shield tube 70 is restricted by the flange portion 82 of the support tube 80 .

In addition, in the gas rice cooker 1, the outer heat insulating cylinder 60 and the inner heat insulating cylinder 70 are supported by the ring-shaped plate material 50 for supporting the thermal heater 58, so that the outer heat insulating cylinder 60 and the inner heat insulating cylinder 70 Since there is no need to provide a separate component for supporting the , it is advantageous in terms of cost.

As shown in FIGS. 5 and 6, the inner hook 9 is inserted into the support cylinder 80 from above. The upper flange portion 9A of the inner hook 9 contacts the upper surface portion 83 of the flange portion 82 of the support cylinder 80 . As a result, the inner pot 9 is suspended inside the support tube 80 and positioned above the burner 10 .

A structure for fixing the upper housing 8 to the lower housing 7 will be described with reference to FIGS. 6, 7 and 9. FIG. As described above, the upper housing 8 is configured in a substantially cylindrical shape by connecting the front side plate member 11, the right side plate member 12, the left side plate member 13, and the rear side plate member 14 to each other. In the upper housing 8, a fixing portion 272 (see FIG. 7) provided on the rear side of the lower inner surface of the right plate member 12, the front fixing portion 129 of the pair of front and rear fixing portions 129, and the lower inner surface of the left plate member 13. The fixing portion 274 (see FIG. 7) provided on the rear side, and the front fixing portion 139 of the pair of front and rear fixing portions 139 are attached to the four first fixing cylinder portions 47 (see FIG. 7) provided on the bottom surface of the lower housing 7 9) and fixed with screws.

Further, the insertion piece 127 (see FIG. 7) provided at the lower end of the right side plate 12 includes two locking protrusions 48 (see FIG. 9) located on the right side of the bottom surface of the lower housing 7 and the lower housing It is inserted and press-fitted from above into the gap between the inner surface of the right side wall of 7 (see FIG. 6). On the other hand, the insertion piece 137 (see FIG. 7) provided at the lower end of the left plate member 13 includes two locking projections 48 (see FIG. 9) located on the left side of the bottom surface of the lower housing 7 and the lower housing It is inserted and press-fitted from above into the gap between the inner surface of the left side wall of 7 (see FIG. 6). As a result, the upper housing 8 surrounds the outer heat insulating tube 60 , the inner heat insulating tube 70 , and the support tube 80 , and the lower end thereof is fixed to the lower housing 7 .

Thus, in this embodiment, the upper housing 8 and the support tube 80 are independently fixed to the lower housing 7 . As a result, the upper housing 8 can be arranged around the support cylinder 80 in a non-contact state with the support cylinder 80 that is heated during rice cooking, so that the upper housing 8 can be made of resin.

In this embodiment, the right side plate 12 and the left side plate 13 are common parts. As a result, of the pair of front and rear fixing portions 271 and 272 of the right plate member 12, the one corresponding to the first fixing cylindrical portion 47 may be fixed with screws. Similarly, the pair of front and rear fixed portions 129 may be fixed by screws at the side corresponding to the first fixed cylindrical portion 47 . The same applies to the left plate member 13 .

The flow of combustion exhaust gas and the flow of cooling air in the gas rice cooker 1 will be described with reference to FIGS. 6 and 11. FIG. As shown in FIG. 6 , combustion exhaust from the burner 10 flows upward through the gap between the outer peripheral surface of the inner pot 9 and the inner peripheral surface of the support cylinder 80 . The combustion exhaust flows into the inner side of the flange portion 82 of the support cylinder 80 . Here, as shown in FIGS. 1, 2, and 11, the right side portion 84A and the left side portion 84B of the outer peripheral surface portion 84 of the flange portion 82 are provided at the upper end portions of the right side surface and the left side surface of the upper housing 8, respectively. It is arranged inside the pair of left and right cutouts 125 and is exposed to the outside. As a result, as shown in FIG. 11, the combustion exhaust flows outward along the inside of the flange portion 82, and flows through a pair of exhaust ports 841 provided in the right side portion 84A of the outer peripheral surface portion 84 and the left side portion 84B. It is discharged to the outside through a pair of exhaust ports 842 (see solid line arrow P1 in FIG. 11). Therefore, the hot air of the combustion exhaust can be prevented from directly contacting the upper housing 8 made of resin, so that the possibility of discoloration of the upper housing 8 can be reduced.

On the other hand, inside the gas rice cooker 1 , an outer heat shielding tube 60 and an inner heat shielding tube 70 are arranged between the support tube 80 and the upper housing 8 . Due to the draft force due to the heating by the burner 10, the cooling air flows from the bottom to the top in the gap between the outer heat shield cylinder 60 and the upper housing 8 (an example of the "air path" of the present invention) (in FIG. 11). See double-dot chain arrow P2). When the cooling air flows upward, it contacts the lower surface portion 85 arranged below the collar portion 82 of the support cylinder 80 and is knitted outward. Here, a gap 90 is formed between the lower surface portion 85 of the flange portion 82 and the cutout portions 125 and 135 in the pair of left and right cutout portions 125 and 135 of the upper housing 8 . As a result, the cooling air knitted outward is discharged to the outside through the gap 90 located below the exhaust ports 841 and 842 . Therefore, the combustion exhaust discharged from the exhaust ports 841 and 842 can be prevented from directly contacting the upper housing 8 . Further, the discharge direction (P1) of the combustion exhaust gas and the discharge direction (P2) of the cooling air are the same. As a result, the flow of the cooling air becomes an air curtain, so that the combustion exhaust is less likely to hit the cutouts 125 and 135 . As a result, it is possible to more effectively prevent the cutouts 125 and 135 of the upper housing 8 from becoming hot due to the heat of the combustion exhaust passing through the exhaust ports 841 and 842 . Therefore, the possibility of discoloration of the upper housing 8 can be reduced more effectively.

Further, as shown in FIGS. 1 and 2, the outer peripheral surface portions 84 of the right side portion 84A and the left side portion 84B of the flange portion 82 of the support tube 80 are shaped so that the cutout portions 125 and 135 of the upper housing 8 are provided. It is the same as the shape of the outer surface. Thereby, the gas rice cooker 1 can improve the appearance around the cutouts 125 and 135 on the outer surface of the upper housing 8 .

As shown in FIGS. 5 and 6, inside the gas rice cooker 1, the outer heat insulating tube 60 and the inner heat insulating tube 70 are arranged outside the support tube 80 with a gap therebetween. As a result, heat transfer from the support tube 80 to the upper housing 8 is effectively blocked. Thereby, the upper housing 8 can be made of resin.

Further, in this embodiment, the outer heat shield tube 60 and the inner heat shield tube 70 are placed and positioned on the upper surface of the ring-shaped plate member 50, and the flange portion 82 of the support tube 80 is positioned between the outer heat shield tube 60 and the inner heat shield tube. The support tube 80 is inserted into the inner heat shield tube 70 from above so as to be positioned above the heat shield tube 70 and fixed to the upper surface of the ring-shaped plate member 50 . As described above, the outer heat shield tube 60 and the inner heat shield tube 70 are restricted from radial displacement by the ring-shaped plate member 50 , and are restricted from moving upward by the flange portion 82 of the support cylinder 80 . As a result, the outer heat shield tube 60 and the inner heat shield tube 70 can be supported on the upper surface of the ring-shaped plate member 50 without undergoing processes such as crimping and screwing. . Thereby, the assembly process of the gas rice cooker 1 can be simplified.

A pair of contact portions 115 (see FIG. 8) are provided on the lower surface of the upper surface portion 111 of the front plate member 11 of the upper housing 8, and a pair of contact portions 115 (see FIG. 8) are provided on the lower surface of the upper surface portion 141 of the rear plate member 14. A contact portion 145 (see FIG. 7) is provided. Furthermore, a rib 128 is provided at the upper end of the curved portion 121 of the right side plate 12 , and a rib 138 is provided at the upper end of the curved portion 131 of the left side plate 13 . The pair of contact portions 115, the pair of contact portions 145, and the ribs 128 and 138 are not in contact with the support tube 80 at the time of shipment. As a result, even if the gas rice cooker 1 is subjected to an impact such as being dropped or deteriorates over time, the upper housing 8 keeps the pair of contact portions 115, the pair of contact portions 145, and the ribs 128 and 138 in place. It contacts with the support cylinder 80 via. In the substantially L-shaped contact portions 115 and 145 , only the tip end portions protruding toward the inside of the upper housing 8 come into contact with the support tube 80 . Therefore, since contact between the upper housing 8 and the support tube 80 can be minimized, heat transfer from the support tube 80 to the upper housing 8 can be effectively prevented.

Also, water droplets generated during the rice cooking process accumulate in a receiving portion 831 provided on the upper surface portion 83 of the collar portion 82 of the support tube 80 (see FIGS. 9 to 11). Water droplets accumulated in the receiving portion 831 are guided toward the outer peripheral surface portion 84 side of the collar portion 82 by the pair of relief portions 832 . As described above, the outer peripheral surface portion 84 side of the right side portion 84A and the left side portion 84B is a portion where combustion exhaust gas and cooling air are discharged to the outside, and thus is a portion that has little effect on gas combustion in the burner 10 . As a result, the gas rice cooker 1 can guide the water droplets collected in the receiving portion 831 to the outer peripheral surface portion 84 side where the gas combustion in the burner 10 is less affected by the pair of relief portions 832 .

As described above, the gas rice cooker 1 of the present embodiment includes the burner 10 and the bottomed cylindrical shape, and the burner head 10A faces the inside of the insertion hole 891 provided in the bottom plate 89. In addition, it includes a support tube 80 that supports the inner pot 9 above the burner 10 and surrounds the inner pot 9, and a housing 2 that accommodates the burner 10 and the support tube 80 inside. In the gas rice cooker 1, the inner pot 9 into which water and rice are charged is supported by the support cylinder 80, the lid 3 provided in the housing 2 is closed, the burner 10 is burned, and the combustion exhaust of the burner is discharged into the inner pot. Rice is cooked by passing it through the space between 9 and the support cylinder 80 . The housing 2 is made of resin. The support tube 80 includes a flange portion 82 protruding radially outward from the upper end portion of the tubular portion 81 . The collar portion 82 has a right side portion 84A and a left side portion 84B for discharging combustion exhaust gas generated by combustion of the burner 10 to the outside. The right side portion 84A and the left side portion 84B are provided with outer peripheral surface portions 84 that are exposed to the outside of the upper housing 8 and directed outward. The outer peripheral surface portion 84 of the right side portion 84A is provided with a pair of exhaust ports 841 for discharging the combustion exhaust that has flowed through the right side portion 84A to the outside. The outer peripheral surface portion 84 of the left side portion 84B is provided with a pair of exhaust ports 842 for discharging the combustion exhaust that has flowed through the left side portion 84B to the outside. As a result, the combustion exhaust flows outward in the right side portion 84A and the left side portion 84B and is discharged outward through the exhaust ports 841 and 842 . Therefore, it is possible to prevent the heat of the combustion exhaust from directly contacting the upper housing 8, so that the possibility of discoloration due to heat can be reduced even in the housing 2 made of resin.

In the above description, the support tube 80 is an example of the "support" of the present invention. The bottom plate 89 of the support cylinder 80 is an example of the "bottom part" of the present invention. The right side portion 84A and the left side portion 84B of the collar portion 82 of the support cylinder 80 are examples of the "exhaust path portion" of the present invention, the outer peripheral surface portion 84 is an example of the "outer peripheral surface" of the present invention, and the exhaust ports 841 and 842 are of the present invention. is an example of the "exhaust port". The notches 125 and 135 of the upper housing 8 are examples of the "recess" of the present invention. The outer heat shield tube 60 and the inner heat shield tube 70 are examples of the "heat shield tube" of the present invention. The escape portion 832 provided on the upper surface portion 83 of the collar portion 82 is an example of the "guide portion" of the present invention.

The present invention is not limited to the above embodiments, and various modifications are possible. Although the housing 2 of the above embodiment is formed in a substantially cylindrical shape, its outer shape can be changed in various ways as long as it is cylindrical, and for example, it may be in the shape of a square tube. Both the lower housing 7 and the upper housing 8 are made of resin, but the lower housing 7 may be made of metal.

In the upper housing 8, the protrusions 35 to 38 are provided on the front side plate member 11 and the rear side plate member 14 side, and the hook-shaped portions 211, 212, 221, 223, 231, 232 are provided on the right side plate member 12 and the left side plate member 13 side. , 241 and 242 are provided, but they may be provided in reverse. good.

The hook-shaped portions 211, 212, etc. of the above-described embodiment are formed in a substantially L-shape in which the tip side is bent upward, so that the groove portion can be inserted downward from the top, but the tip side is downward. It may be formed in a substantially L shape that bends in the direction, and may be provided with a groove portion that can be inserted upward from the downward direction.

The hook-shaped portions 211, 212, etc. of the above-described embodiment are formed in a substantially L-shape in which the tip side is bent upward, so that they are provided with grooves that can be inserted downward from above. The groove may be formed in a shape different from that of the groove, for example, it may be a U-shaped groove.

The upper housing 8 of the above-described embodiment is configured by assembling four resin molded products to each other, but may be configured with four or more, or may be configured with three or two.

Although the support tube 80 of the above embodiment has the bottom plate 89 fixed to the bottom of the tube portion 81, the bottom plate 89 and the tube portion 81 may be integrally formed.

The ring-shaped plate member 50 of the above-described embodiment positions the lower end portion of the outer heat insulating tube 60 by the outer locking portion 53 on the upper surface, and the pair of locking projections 75 are inserted into the pair of locking holes 57 and locked. Although the lower end portion of the inner heat shield tube 70 is positioned by this, it may be positioned by a structure other than these.

In the above embodiment, the front plate member 11 of the upper housing 8 is provided with a pair of contact portions 115, the rear plate member 14 is provided with a pair of contact portions 145 (see FIG. 7), and the right plate member 12 is provided with a pair of contact portions 145 (see FIG. 7). is provided with ribs 128, and the left plate member 13 is provided with ribs 138, but the number, shape, position, etc. thereof can be freely changed. Preferably, each of the front plate member 11, the rear plate member 14, the right plate member 12, and the left plate member 13 is provided with a "protrusion".

In the above embodiment, the outer peripheral surface portion 84 of the right side portion 84A of the collar portion 82 of the support tube 80 is provided with a pair of exhaust ports 841, and the outer peripheral surface portion 84 of the left side portion 84B is provided with a pair of exhaust ports 842. However, the number, shape, arrangement, etc. of the exhaust ports can be freely changed. The outer peripheral surface shape of the outer peripheral surface portion 84 of the right side portion 84A is a substantially rectangular shape that is elongated in the left-right direction, but other shapes may be used. In accordance with this, the shape of the outer surface of the cutouts 125 and 135 of the upper housing 8 may be changed.

In the above-described embodiment, the receiving portion 831 and the pair of relief portions 832 are provided on the upper surface portion 83 of the collar portion 82 of the support cylinder 80, but the number and position of the relief portions 832 can be freely changed.

In the above-described embodiment, the outer heat shielding tube 60 and the inner heat shielding tube 70 are provided inside the housing 2, but the number of heat shielding tubes may be one, or two or more.

Reference Signs List 1 gas rice cooker 2 housing 3 lid 7 lower housing 8 upper housing 9 inner pot 10 burner 60 outer heat shield tube 70 inner heat shield tube 80 support tube 82 flange 84 outer peripheral surface 84A right side 84B left side 89 bottom plate 90 Gap 125, 135 Notch 831 Receptacle 832 Relief 841, 842 Exhaust port

Claims (5)

A burner and a bottomed cylindrical shape, with the flame port of the burner facing the inside of the opening provided in the bottom, and supporting the inner pot above the burner to surround the inner pot. comprising a support and a housing for housing the burner and the support inside, supporting the inner pot filled with water and rice on the support, closing a lid provided on the housing, A gas rice cooker that cooks rice by burning the burner and passing combustion exhaust of the burner through the space between the inner pot and the support,
The housing is made of resin,
The support is
provided with a flange protruding radially outward from the upper end,
The collar portion has a discharge path portion for discharging combustion exhaust generated by combustion of the burner to the outside,
The discharge route section
an outer peripheral surface exposed to the outside of the housing and facing outward;
A gas rice cooker, comprising: an exhaust port provided on the outer peripheral surface for discharging the combustion exhaust that has flowed through the discharge path portion to the outside. In the upper part of the housing, a notch is formed at a position corresponding to the outer peripheral surface of the discharge path portion in a state in which the support is arranged inside the housing, and the outer peripheral surface faces downward. 2. The gas rice cooker according to claim 1, further comprising a recess disposed inside with a gap therebetween and exposing the outer peripheral surface to the outside of the housing. a metal heat shield cylinder disposed between the housing and the support and surrounding the support;
an air path provided between the heat shield cylinder and the housing, through which air passes from the bottom to the top by a draft force caused by combustion of the burner,
3. The gas rice cooker according to claim 2, wherein the air that has passed through the air path is woven radially outward by the lower surface of the flange portion and discharged to the outside through the gap. The gas rice cooker according to claim 2 or 3, wherein the shape of the outer peripheral surface of the discharge path portion is the same as the shape of the outer surface of the housing provided with the recess. A cross section perpendicular to the circumferential direction is formed in a concave shape on the upper surface of the collar portion, and a receiving portion for receiving water droplets generated during rice cooking is provided in the circumferential direction,
Of the wall portions on both sides of the receiving portion, the wall portion formed on the outer peripheral portion is formed in a downward concave shape to connect the bottom portion of the receiving portion and the outer peripheral surface of the discharge path portion. 5. The gas rice cooker according to any one of claims 1 to 4, wherein a guiding portion is provided for guiding water droplets accumulated in said receiving portion toward said outer peripheral surface.

Images