JPH07155256A - Rice cooker - Google Patents

Abstract

PURPOSE:To prevent a disturbance of accidental rotation of a rice cooking pot in the upper case in the scooping of rice cooked in the rice cooking pot with a spoon even the rice cooking pot is made of a light synthetic resin. CONSTITUTION:A bottomed cylindrical inner shell 12 is provided in the upper case to house a rice cooking pot 10 and swell parts 19 and 19 are arranged partially on an internal wall before and after the inner shell 12. A slight gap is set between the top of the swell parts 19 and the shell of the rice cooking pot 10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rice cooker, and more particularly to a heat retaining type rice cooker containing a rice cooker made by press-molding an aluminum plate.

[0002]

2. Description of the Related Art As a heat-retaining type gas rice cooker, a rice cooker that cooks rice by the heating power of a gas burner and is capable of keeping heat for a long time by an electric heater after the rice is cooked is widely used. In this type of conventional rice cooker, for example, as shown in FIG. 1, the rice cooker (10) is attached to the upper case (1).
Is housed in the upper case (1) and has a heat insulating material and a heater (H) for heat retention.
It is concentrically surrounded by an inner case made up of a heat insulation layer (11) with a built-in heat insulation layer (11) .The bottom of the rice cooker (10) exposed downward from this inner case is housed in the lower case (2). The rice is heated by the heating power of the existing gas burner (B) and the rice cooking operation is performed.

After the rice is cooked, the combustion of the gas burner (B) is automatically stopped, and the heater for heat insulation (H) is also used.
, The heat insulation layer (11) that houses it, and the lid (4)
The inside of the rice cooker (10) is heated and kept warm by the heat insulating layer (49) made up of a heat insulating material and a heater. Conventionally, the rice cooker (10) is generally made of cast metal. However,
Cast rice cookers are expensive and heavy, making them difficult to handle. Therefore, in recent years, a rice cooker made of an aluminum plate, which can be manufactured at low cost by press molding, has become widespread.

Since the conventional casting rice cooker is heavy, even if the amount of cooked rice in the rice cooker is small, the rice cooker does not accidentally rotate in the inner barrel.
On the other hand, since the above-mentioned press cooker is lightweight, when the amount of cooked rice in the cooker becomes small, when removing cooked rice from the cooker with a scoop, the inner barrel is concentric with the cooker. The rice cooker inadvertently rotates inside the ladle with the movement of the ladle, which makes it difficult to scoop up the cooked rice.

This is because the rice cooker (10) made of an aluminum plate is light in weight, and is dropped into and supported by the inner body of the heat insulating and heat retaining layer (11) which is concentric with the rice cooker. Since there is little rice in the rice cooker (10),
It rotates easily with a slight force.

[0006]

[Technical Problem] The present invention has been made in view of the above point, and says, "A rice cooker (10) is provided in an upper case (1) that is placed or connected to a lower case that accommodates a heat generating portion. Even if the rice cooker (10) is a lightweight press-molded product, the rice cooker in the upper case (1) is inadvertently cooked when scooping the cooked rice in the rice cooker (10). In order to prevent the cooker (10) from rotating, it is a technical subject to provide a rotation blocking means that blocks the rotation of the rice cooker (10). [Regarding the Invention of Claim 1]

[0007]

[Technical Means] A technical means of the present invention for solving the above-mentioned problem is to provide an inner case (12) having a cylindrical shape for accommodating a rice cooker (10) in an upper case (1), A bulging portion (19) (19) is partially provided on the inner wall of the inner trunk (12), and the bulging portion (19) (1)
The gap between the top of the inner circumference of 9) and the body of the rice cooker (10) was set very small. ”

[0008]

The above technical means operates as follows. Rice cooker
When (10) is made of a lightweight aluminum plate, if there is not much rice in the rice cooker (10), the rice cooker (10) will move along with the movement of the ladle to scoop the rice (12). ), But even with a slight eccentric movement, the rice cooker
The body of (10) has a bulge (1
9) will come into contact with (19), this bulge (19) (19)
Will exert a braking effect on the rice cooker (10). Therefore, the careless rotation of the rice cooker (10) is prevented when taking out the cooked rice.

[0009]

[Effect] Even if the rice cooker (10) is a lightweight press-molded product, there is no inconvenience that the rice cooker (10) rotates in the inner barrel (12), so cooked rice in the rice cooker (10) Even if the amount of rice is small, the rice cooker (10) does not rotate together with the scoop when scooping the cooked rice, and the rice is easily poured from the rice cooker (10) into the bowl. [Claim 4] Since the flange portion (10a) connected to the open upper end portion of the rice cooker (10) is supported only by the plurality of support portions provided on the inner body (12), The contact between the support and the flange (10a) also has a braking effect,
Rotation within the inner barrel (12) of the rice cooker (10) is further prevented.

[0010]

Embodiments of the present invention described above will be described in detail with reference to the drawings shown in FIG. In this embodiment, the upper case (1) and the lower case (2) are formed in a rectangular shape so that the round rice cooker (10) can be housed in the upper case (1) having a substantially rectangular parallelepiped shape. A lid (4) is supported at the upper end open part of the rear part in a one-sided open manner so as to open to the front.

In the upper case (1), an upper flange body (1b) is continuously provided at the upper end of a rectangular casing with a bottomed cylindrical casing (1a), and a circular shape is formed on the inner peripheral edge of the upper flange body (1b). A cylindrical inner body (12) with a bottom in cross section is inserted and fixed, and the inner body (1
An opening (13) is formed in the bottom portion (12a) of 2), and the inner barrel (12) is arranged so as to be slightly rearwardly displaced with respect to the upper flange body (1b).

A bottom flange (14) projects from the lower end of the rectangular tubular casing (1a) toward the inner peripheral side, and the inner peripheral edge portion is integrally connected to the bottom portion (12a) by a technique such as spot welding. The strength of the peripheral portion of the opening (13) of the bottom portion (12a) is reinforced. The inner diameter of the bottom flange (14) is naturally set to be larger than the flame hole portion (B ₁ ) of the gas burner (B) described later, but is set to be smaller than the inner diameter of the opening (13). Has been done. And the bottom flange (14)
The inner peripheral part of this is a U-shaped section (14a) that opens upward.

On the other hand, in the vicinity of the joint between the upper flange body (1b) and the upper end of the inner case (12), the inner case (1
A groove (15) is formed so as to surround the upper end of (2), and a mouth (15a) is penetratingly formed at a portion corresponding to the pivotal support of the lid (4), which is located behind the upper case (1). It faces the inner end of the dew tray (16) which is detachably inserted from the surface. still,
The rice cooker (10) is formed by press-molding an aluminum plate, the bottom of which has a spherical shape that gently bulges upward, and the flange (10a) overhangs at the upper end opening. Then, as shown in FIGS. 2 and 4, the upper ends of the pair of support plates (17) and (18) attached to the front and rear of the inner case (12) are in contact with the lower surface of the flange (10a), Inside the rice cooker (10)
It is supported at a predetermined height in (12).

A thermal reed switch (61) for detecting a heat retention temperature is attached to one of the support plates (17). The supporting position is set to have a very small space (for example, about 2 mm to 4 mm) with the upper surface of the soaking plate (3) described later. Note that this distance is most preferably about 3 mm.

Further, as shown in FIGS. 2 to 5, on the inner walls of the front and rear of the inner case (12) and below the support plates (17) and (18),
The bulging parts (19) (19) protruding inward are formed over a certain range, and the distance between the top of the bulging part and the body of the rice cooker (10) is very small (about 1 mm). ) Is set. still,
According to experiments, this gap is preferably about 0.5 mm to 1 mm.

The bulging portions (19) and (19) function as rotation preventing means of the rice cooker (10), and these bulges (19) and (19) are provided at predetermined positions of the inner barrel (12) corresponding to the front-back direction of the rice cooker. Bulge
(19) (19) and the support plates (17) and (18) are formed, the combustion exhaust gas generated when cooking rice is bulged (19) (19)
The rise of the rice cooker is prevented by the support plates (17) and (18), so that the rice is not exhausted in the front-back direction. Therefore, the operation part provided on the front upper part of the rice cooker and the shaft support part of the lid at the rear end part are protected from combustion exhaust.

The heat equalizing plate (3) is set to have a cross-sectional shape which follows the shape of the back surface of the bottom surface of the rice cooker (10), and has a through hole for a heat-sensitive mechanism section, which will be described later, formed in the center. An annular hanging piece (31) is continuously provided from the peripheral edge. An annular heat-retaining heater (H) is attached to the back surface near the periphery of the heat equalizing plate (3), and a protective cover (32) that opens to the outer peripheral side is covered below the heater (H).

The peripheral portion of the heat equalizing plate (3) and the peripheral portion of the bottom portion (12a) are connected by a plurality (for example, three) of leg pieces (33) (33). The mounting height of the heat equalizing plate (3) is set to a predetermined height depending on the height. A sheath heater is used as the heat-retaining heater (H), and the cooling zone thereof is bent along the leg pieces (33) and the bottom portion (12a), and as shown in FIGS. After being guided downward by being surrounded by a leg piece (33) and a bottom portion (12a) provided below the supporting plate (18) positioned above and a metal cover (33a) superimposed on these, the bottom portion (12a) ) From the rear of the lower end of the inner shell (12) to the rear space between the casing (1a) and the inner shell (12).
Introduced in (1c). Then, in the rear space portion (1c), the power supply cord of the reel device (R) provided at the rear portion of the upper case (1) is connected via the temperature control device (C).

The lid (4) is rotatably supported by a bearing (41) provided at the upper rear end of the upper case (1) and is always biased in the opening direction, and is provided at the front edge thereof. Engagement piece (42)
Lock mechanism (43) provided on the front edge of the upper flange body (1b)
It is possible to engage and disengage with. On the back of the lid (4), the inner lid (40)
Is provided. A weight (45) is externally fitted to the knob shaft (44) protruding from the center of the inner lid (40).
A shaft portion (46) projecting from the back surface of the lid body (4) is detachably fitted in this. The inner lid (40) is formed in a shallow dish shape as a whole, and the cylindrical shaft (44) is attached to the top surface of a raised portion formed in the center of the inner lid (40). It is designed to contact the flange (10a) at the top of 10).

The lower case (2) contains a gas burner (B), a fire extinguishing mechanism, a heat-sensing mechanism section, a combustion control device, etc., and the heat-sensing mechanism section is a base (21) to which the gas burner (B) is attached. It is composed of an elevating cylinder (50) which is supported by a supporting table (22) attached to the same and is urged upward at all times, and a heat sensitive element (52) provided on the top wall (51) of the elevating cylinder. The elevating cylinder (50) is formed in the center of the gas burner (B) and is housed in a through space that penetrates vertically, and the upper end portion of the soaking plate
It projects upward from the through hole in the center of (3).

A permanent magnet (53), which serves as an input end of a fire extinguishing mechanism, faces the heat sensitive element (52) so as to be able to move up and down. This fire extinguishing mechanism has a well-known structure, and the permanent magnet (53) interlocking with the lever mechanism is attached to the heat sensitive element (52) of the top wall (51) which is in contact with the bottom of the rice cooker (10) by the rice cooking operation. The magnetism of the thermosensitive element (52) suddenly changes according to the temperature of the bottom of the rice cooker (10) when the rice is adsorbed and held and the rice is cooked (the gas circuit is connected to the gas burner (B)). Then, the attraction with the permanent magnet (53) is released and the lever mechanism is activated, whereby the gas circuit to the gas burner (B) is cut off and the gas burner (B) is automatically extinguished.

In the above embodiment, the support plates (17) and (18), which are separate bodies, are attached to the inner case (12) to form a support section. As the support section, the bulging sections (19) and (19) are used. 7), the rice cooker support portions (N) (M) may be provided partially inside and above the inner case (12) as shown in FIGS. 7 and 8. Install the thermal reed switch (61) for detecting the heat retention temperature of the rice cooker so that the top surface of one of these rice cooker support parts (N) contacts the inner surface of the contact part with the flange part (10a). May be. In this case, when the thermal reed switch (61) is surrounded by the protective cover (62) and the protective cover is brought into contact with the inner surface of the contact portion, the thermal switch (61) is reliably protected.

.. Since the rice cooker (10) is an aluminum press-molded product, the thickness of the bottom of the rice cooker is smaller than that of a cast product, but in this embodiment, the soaking plate (3) prevents the burner (B) from The heat of the combustion flame is dispersed and relaxed and transferred to the bottom of the rice cooker (10), so that the cooked rice is improved. ． In the case of a structure in which a very small gap is formed between the bottom of the rice cooker (10) and the soaking plate (3) at the time of heat retention, it is heated by the heat retention heater (H) and this at the time of heat retention. The heat insulating layer that flows from the gap is formed between the hot air layer from the heat equalizing plate (3) and the outer surface of the rice cooker (10), and the conventional heat retaining layer is not used. Even in the form, a sufficient heat retaining effect can be obtained.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of a conventional example.

FIG. 2 is a sectional view of an embodiment of the present invention.

FIG. 3 is a plan view thereof.

4 is a sectional view taken along line XX of FIG.

5 is a sectional view taken along line YY of FIG.

FIG. 6 is a partially cutaway plan view of the heat equalizing plate (3).

FIG. 7 is an explanatory diagram of another embodiment.

FIG. 8 is a plan view of FIG.

[Explanation of symbols]

 (10) ・ ・ ・ ・ Rice cooker (10a) ・ ・ ・ Flange part (1) ・ ・ ・ ・ Upper case (12) ・ ・ ・ ・ Inner case (19) ・ ・ ・ ・ Swelling part

Front page continuation (72) Inventor Takashi Oya 2-26 Fukuzumicho, Nakagawa-ku, Nagoya Rinnai Co., Ltd.

Claims (5)

[Claims] 1. A rice cooker in which a rice cooker (10) is removably accommodated in an upper case (1) placed or connected to a lower case accommodating a heat-generating part, in the upper case (1). Is provided with a cylindrical inner body (12) for accommodating the rice cooker (10), and the bulging portions (19) and (19) are partially provided on the inner wall of the inner body (12) and Rice cooker in which the gap between the inner peripheral tops of the parts (19) and (19) and the body of the rice cooker (10) is set to be very small. 2. The rice cooker is a gas rice cooker in which a rear end portion of a lid is pivotally supported by an upper case (1) and an operating portion is provided on a front upper portion, and the rice cooker includes a bulging portion (19) (19). Position the inner body (12)
The rice cooker according to claim 1, wherein the rice cooker is set on the front and rear inner walls. 3. The inner peripheral top of the bulging parts (19) (19) and the rice cooker (10)
The rice cooker according to claim 1 or 2, wherein the distance between the rice cooker and the body is set to about 0.5 mm to 1 mm. 4. The flange part (10a), which is connected to the upper open part of the rice cooker (10), is supported over a certain range only by a plurality of supporting parts provided on the inner case (12). The rice cooker according to any one of claims 1 to 3. 5. A bulging part (19) (19) is provided at the upper end of the inner case (12) so that the rice cooker (10) is supported only by this bulging part (19) (19). The rice cooker according to any one of claims 1 to 3.