JP6258840B2 - rice cooker - Google Patents

Description

  The present invention relates to a rice cooker that cooks rice using a kettle having a collar.

  The rice cooker accommodates a pot containing rice and water in the rice cooker body, and closes the lid to cook rice, but the annular lid packing attached to the lid ensures adhesion to the pan. It prevents it from leaking steam during cooking, or ensures a hermetic seal when pressurized.

  For example, Patent Document 1 discloses that an annular lid packing is formed on the upper end inner peripheral surface of a substantially cylindrical bottomed pan in which a flange portion is formed in an upper end opening and a peripheral wall portion expands toward the upper end. It discloses disclosing a hermetic seal structure by abutting.

JP 2011-120864 A

  In the pan of Patent Document 1 having a flange portion at the upper end opening, a lid packing introduction portion that guides the lid packing to the inner surface of the upper end opening portion of the pan is expanded to the outside in the radial direction of the flange portion. It is easy to secure the lid packing introduction part. As a result, when closing the lid, the lid packing can be smoothly inserted into the upper end opening of the pan.

  However, in the so-called pot-shaped pan in which the flange portion is installed below the upper end opening and the peripheral wall portion extends substantially vertically, a lid packing introduction portion having a sufficient width in the radial direction is formed. Difficult to do. Therefore, in the case of a pot-shaped pot, there is a problem that when the lid is closed, the lid packing is twisted and may not be smoothly inserted into the upper end opening, so that it is difficult to ensure a hermetic seal.

  Therefore, the technical problem to be solved by the present invention is that in a rice cooker using a kettle having a ridge, a sealing seal is ensured and a lid packing is smoothly inserted into the upper end opening of the kettle when the lid is closed. It is providing the rice cooker which can be made.

  In order to solve the above technical problem, according to the present invention, the following rice cooker is provided.

That is, the rice cooker according to the present invention is
A bottomed cylindrical hook having an upper end opening and an annular flange provided on a peripheral wall part below the upper end opening;
A rice cooker body having a heel support portion at the top for suspending the heel portion;
A lid that covers the top of the kettle and is arranged to be openable and closable on the rice cooker body;
A lid packing attached to the lid so as to face the upper end opening of the pot, and a rice cooker comprising:
In the shuttle, at least the peripheral wall portion in the vicinity of the upper end opening extends substantially vertically,
The shuttle is provided with a lid packing introduction portion configured to expand toward the upper end opening on the inner peripheral surface side in the vicinity of the upper end opening.

  According to the present invention, in the hook provided with the flange portion on the peripheral wall portion below the upper end opening, the sealing seal is ensured by the lid packing introduction portion provided on the inner peripheral surface of the hook near the upper end opening. Meanwhile, the lid packing can be smoothly inserted into the upper end opening when the lid is closed.

  It is preferable that the lid packing is not in contact with the inner peripheral surface of the pot when the lid is closed, whereas the lid packing is in contact with the inner peripheral surface of the pot during cooking. . If it does in this way, opening and closing of a lid can be made smoothly before cooking rice, and a sealing property can be secured during cooking.

  It is preferable that the lid packing is configured to come into contact with the inner peripheral surface of the hook when the lid is closed. If it does in this way, opening and closing of a lid can be made smoothly before cooking rice, and a sealing property can be secured during cooking.

  The lid packing introduction part preferably has an R-surface shape or a chamfered shape in cross-sectional view. If it does in this way, formation of a lid packing introduction part will become easy.

  It is preferable that the diameter of the lid packing introduction portion is increased to a radially outer position that is half or more of the thickness of the upper peripheral wall portion located above the collar portion. In this way, the upper end opening is opened larger, so that the lid packing can be smoothly inserted into the upper end opening.

  It is preferable that the thickness of the upper peripheral wall part located above the collar part is thicker than the thickness of the lower peripheral wall part located below the collar part. If it does in this way, formation of a lid packing introduction part will become easy.

  The lid packing introduction part is preferably formed by projecting a peripheral wall part in the vicinity of the upper end opening part radially outward. In this way, the lid packing introduction portion can be formed without changing the thickness of the peripheral wall portion, and the mechanical strength at the upper end portion of the hook can be maintained.

  In the rice cooker of the present invention, the pot provided on the peripheral wall part below the upper end opening is provided with a lid packing introduction part on the inner peripheral surface side in the vicinity of the upper end opening. It is possible to ensure hermetic sealing and easy insertion of the lid packing.

It is sectional drawing which shows the pressure type rice cooker which concerns on 1st Embodiment of this invention. It is a fragmentary sectional view of the pot in the pressure type rice cooker shown in FIG. It is a fragmentary sectional view in a hook part periphery from the upper end part in the shuttle shown in FIG. It is the fragmentary sectional view which expanded the upper end part periphery in the shuttle shown in FIG. It is the fragmentary sectional view which expanded the upper end part periphery in the shuttle which concerns on a 1st modification. It is the fragmentary sectional view which expanded the upper end part periphery in the shuttle which concerns on a 2nd modification. It is a fragmentary sectional view in a hook part periphery from the upper end part in the shuttle which concerns on a 3rd modification. In the pressure type rice cooker shown in FIG. 1, it is a fragmentary sectional view explaining the relationship between a hook and lid packing when a lid is closed. In the pressure rice cooker shown in FIG. 1, it is a fragmentary sectional view explaining the relationship between the hook and lid packing in cooking. In the pressure type rice cooker which concerns on 2nd Embodiment of this invention, it is a fragmentary sectional view explaining the relationship between a hook and lid packing when a cover body is closed. In the pressure type rice cooker shown in FIG. 10, it is a fragmentary sectional view explaining the relationship between the hook and lid packing in cooking. In the pressure type rice cooker which concerns on 3rd Embodiment of this invention, it is a fragmentary sectional view explaining the relationship between a hook and lid packing when a cover body is closed. In the pressure rice cooker shown in FIG. 12, it is a fragmentary sectional view explaining the relationship between the hook and lid packing in cooking.

  Below, the pressure type rice cooker 1 which concerns on 1st Embodiment is demonstrated in detail, referring FIG. 1 thru | or 9. FIG.

  As shown in FIG. 1, the pressure-type rice cooker 1 includes a pot 3 for storing cooked rice and water, a rice cooker main body 10 for detachably storing the pot 3, and the rice cooker main body 10. And a lid 20 disposed to be openable and closable. As will be described later, the rice cooker 1 is a rice cooker in a state where the ridge portion 4 provided at a predetermined position of the peripheral wall portion 3C of the pot 3 is suspended by the ridge support member 50 provided at the upper portion of the rice cooker body 10. The lower container part 3L of the hook 3 is accommodated in the lower accommodation part 11L of the main body 10.

  The rice cooker body 10 includes a cylindrical body 12 (for example, SUS430) having an upper end and a lower end, a shoulder body 14 that closes the upper end opening of the body 12, and a bottom that closes the lower end opening of the body 12. And an exterior body having a body 13. A lower housing portion 11L is formed in the exterior body by a part of the shoulder body 14, the lower inner body 42, and the protective frame 41, and the lower container portion 3L of the shuttle 3 is detachably housed in the lower housing portion 11L. .

  The shoulder body 14 constitutes an upper portion of the exterior body and is attached by being fitted into the upper end opening of the body 12. On the back side of the shoulder body 14, a hinge connection portion 17 for rotatably mounting the lid body 20 is provided. The lid 20 is configured to be elastically openable by a hinge spring 17A provided in the hinge connection portion 17. An opening of the lower housing portion 11L is provided in the inner peripheral portion of the upper end of the shoulder body 14. A hook support member 50 that receives and supports the hook 4 of the hook 3 is disposed at the upper end around the opening. The heel support member 50 includes a heel support portion 50A that extends horizontally in a cocoon shape, and a lower inner trunk support portion 50B that protrudes downward so as to form a cylindrical shape. The lower inner cylinder 42 is integrally fixed to the heel support portion 50A and the lower inner cylinder support portion 50B of the heel support member 50. The bottom body 13 constitutes a lower portion of the exterior body and is attached by being fitted into the lower end opening of the body 12. The bottom body 13 is provided with a boss for mounting and fixing the protective frame 41. The rice cooker main body 10 is provided with an annular main body reinforcing plate (reinforcing member) 45 which is positioned below the rice bran support member 50 and receives and reinforces the rice bran support member 50.

  The lower inner body 42 is made of a metal member (for example, aluminum having excellent thermal conductivity), and constitutes an upper portion of the lower housing portion 11L. The lower inner body 42 includes an upper surface heating part 42A extending horizontally in a bowl shape and a lower side surface heating part 42B having a shape protruding downward so as to form a cylindrical shape. The upper surface heating part 42A and the lower side surface heating part 42B of the lower inner cylinder 42 cover the heel support part 50A and the lower inner cylinder support part 50B of the heel support member 50, respectively. A plurality of lower body heaters 43 are disposed outside the lower surface heating portion 42B of the lower inner body 42. The lower body heater 43 indirectly heats the lower side surface portion of the lower container portion 3L of the hook 3 through the space in the lower housing portion 11L. The armpit heater 51 is embedded in the groove portion of the rod support member 50 between the rod support portion 50A of the rod support member 50 and the upper surface heating portion 42A of the lower inner cylinder 42. 42 A of upper surface heating parts are arrange | positioned at the rice cooker main body 10 side by the fixed type, and work | function as a rice bran heating part which heats the rice bran part 4 directly. When the pot 3 is set in the rice cooker body 10, the lower surface 4 </ b> B of the heel portion 4 comes into contact with the upper surface heating portion 42 </ b> A of the lower inner body 42, and the heel portion 4 is directly heated by the lower arm heater 51. The heel support member 50 is provided with a heel temperature sensor (not shown) that detects the temperature of the heel support member 50.

  The protective frame 41 is made of a non-conductive resin material, constitutes a lower portion of the lower housing portion 11L, and has a tray shape. On the lower outer surface of the protective frame 41, for example, a bottom temperature for detecting the temperature of the bottom 3B of the hook 3 is provided on the bottom of the protective frame 41 to which the induction heating coil 18 as a heating means is fixed via a ferrite core. A sensor is provided.

  When the lid 20 is closed with respect to the rice cooker body 10, the lid 20 covers the top of the pot 3 and closes the opening of the rice cooker body 10, and constitutes an outer surface material together with the exterior body of the rice cooker body 10. A plate 21 and a lower plate 22 that closes the bottom of the upper plate 21 are provided. The lower plate 22 is provided with a heat radiating plate 24, a lid heater 25, and an inner lid 30 that closes the upper end opening of the hook 3. Further, a lid temperature sensor (not shown) for detecting the temperature in the hook 3 is disposed inside the lid body 20.

  An opening operation member 23 for opening the lid 20 is disposed on the front side of the upper plate 21, and a lid hook 27 for maintaining the closed state of the rice cooker body 10 is disposed therein. Yes. A hook claw 27A of the lid hook 27 is configured to be engageable with and disengageable from a hook receiving portion 27B attached to the shoulder body 14, and functions as a lid lock mechanism. The lower plate 22 is rotatably set on a hinge connection portion 17 formed on the back side of the rice cooker body 10. A metal lid reinforcing plate 48 is fixed on the lower plate 22. A heat radiating plate 24 is disposed on the lower (inner) side surface of the lower plate 22 located on the hook 3 side in the closed state. A lid heater 25 for heating the upper container portion 3U of the hook 3 is disposed on the upper side surface of the heat radiating plate 24. The lid heater 25 is arranged so as to bypass various holes formed for arranging each component.

  An inner lid 30 that closes the upper end opening of the hook 3 is detachably disposed on the lower (inner) side surface of the heat radiating plate 24 facing the hook 3. The inner lid 30 includes an inner lid plate 34, and an inner lid frame member 32 is attached to the outer periphery of the inner lid plate 34 (shown in FIG. 8 and the like). A lid packing 33 that seals the inner periphery of the upper end opening of the hook 3 is disposed on the lower (inner) side surface of the inner lid frame member 32. The inner lid 30 is configured to be detachable from the lid body 20. In the present invention, the inner lid 30 is not limited to a configuration in which the inner lid 30 can be attached to and detached from the lid body 20, and an inner configuration in which the inner lid 30 cannot be detached from the lid body 20 can be adopted.

  A first pressure regulating valve (not shown) and a second pressure regulating valve 36 are disposed on the upper surface side of the inner lid 30, and the pressure in the hook 3 is made to be higher than the atmospheric pressure by the first pressure regulating valve and the second pressure regulating valve 36. This makes it possible to set a high pressure. The first pressure regulating valve and the second pressure regulating valve 36 are pressure regulating mechanisms provided in the steam passage. Inside the lid 20 is formed a steam passage for exhausting steam generated from the pot 3 during cooking to the outside. Each vent formed in each of the first pressure regulating valve and the second pressure regulating valve 36 disposed in the inner lid 30 serves as an inlet for the steam in the steam passage. After the steam from the pot 3 flows into the first pressure regulating valve and the second pressure regulating valve 36, the heat radiating plate 24 and the inner lid 30 are opened from the lower end openings of the first pressure regulating valve accommodating portion and the second pressure regulating valve accommodating portion. Flows into the gap formed between the two. The steam from the hook 3 flows into the steam unit 29 disposed on the upper plate 21 through the gap. The steam from the hook 3 passes through the steam unit 29 and is discharged to the outside from an exhaust port formed in the steam unit 29.

  An upper inner body 62 is integrally fixed to the inner peripheral portion of the lower plate 22 of the lid 20. The upper inner body 62 is made of a metal member (for example, aluminum having excellent heat conductivity), extends in a cylindrical shape from the upper part to the lower part, and the lower part is curved in a divergent manner from the inner side to the outer side. It has a substantially cylindrical shape. An upper housing portion 11U for housing the upper container portion 3U of the hook 3 is formed by the lower surface of the inner lid 30 and the upper inner body 62. A plurality of annular upper body heaters 63 are disposed outside the upper side surface heating unit 62B of the upper inner body 62. The upper container portion 3U of the hook 3 is indirectly heated by the annular upper body heater 63 through the space in the upper housing portion 11U. Further, the upper body heater 63 is fixedly disposed on the lid body 20 side, and the lower end portion of the upper body heater 63 is positioned in the vicinity of the flange portion 4. It is heated indirectly. That is, the lower end portion of the upper body heater 63 functions as a rod heating unit that indirectly heats the flange portion 4. An upper inner cylinder temperature sensor (not shown) for detecting the temperature of the upper inner cylinder 62 is disposed on the heel support member 50.

  A control board (not shown) is disposed in the rice cooker body 10 of the rice cooker 1 having the configuration. Then, by a microcomputer as a control means mounted on the control board, the induction heating coil 18, the lower body heater 43, the lower body heater 51, the upper body heater 63, and the upper body heater 63 based on the detected temperature of each temperature sensor according to a program stored in advance. The heating (energization) control of the lid heater 25 is performed, rice cooking (cooking) processing is performed through each process such as preheating, temperature rise (medium patch), power control, and unevenness, and the cooked rice is predetermined. A heat retention process is performed to maintain the temperature.

  As shown in FIG. 2, the hook 3 is made, for example, by casting iron (southern iron) having high thermal conductivity. A ridge 3D that is curved with a predetermined curvature is provided between the bottom 3B and the peripheral wall 3C. In the peripheral wall portion 3 </ b> C of the hook 3, the flange portion 4 is provided at a predetermined position between the upper end portion 3 </ b> A of the hook 3 and the ridge portion 3 </ b> D. The peripheral wall 3C positioned above the flange 4 is the upper peripheral wall 3F, and the peripheral wall 3C positioned below the flange 4 is the lower peripheral wall 3E. The flange portion 4 has an annular shape protruding outward in the radial direction. The collar portion 4 has an upper surface 4A and a lower surface 4B. In the hook 3, a portion positioned above the flange portion 4 constitutes the upper container portion 3U, and a portion positioned below the flange portion 4 constitutes the lower container portion 3L. The hook 3 is closed in the form of a flat disk at the bottom 3B, has a substantially cylindrical shape in which the upper container 3U above the flange 4 extends substantially vertically, and the lower container below the flange 4 3L has a bottomed cylindrical shape that gradually decreases in diameter downward. The kettle 3 is heated by induction heating or heater heating. For example, eddy current flows from the bottom portion 3B to the ridge portion 3D by a magnetic field generated by flowing a high-frequency current through an induction heating coil 18 serving as a heating means. Is done.

  In the peripheral wall portion 3 </ b> C of the hook 3, the flange portion 4 is provided at a predetermined position below the upper end opening 7, that is, at a predetermined position between the upper end portion 3 </ b> A and the bottom portion 3 </ b> B of the hook 3. For example, with respect to the height of the hook 3, that is, the height from the bottom surface of the bottom portion 3B to the upper end portion 3A, the flange portion 4 is 1 / 4 is provided between the lower limit positions. When the eaves part 4 is located above the upper limit position, the ratio of the lower container part 3L of the pot 3 accommodated in the rice cooker body 10 increases, and the heat of the pot 3 and the rice in the pot 3 is heated by the rice cooker body. It will be easier to escape to 10 and it will be difficult to cook delicious rice. When the collar part 4 is positioned below the lower limit position, the usability when using the collar part 4 as a handle for gripping the hook 3 is lowered. Therefore, by arranging the bowl 4 at the predetermined position, the lower container portion 3L of the pot 3 accommodated in the rice cooker main body 10 is reduced, and the heat escaping toward the inside of the rice cooker main body 10 can be reduced. Also, the usability as a handle when gripping the hook 3 is improved.

  As shown in FIG. 3, an open upper end opening 7 is formed on the upper surface of the upper end 3 </ b> A of the hook 3, and the lid packing introduction part 6 extends from the inner peripheral surface 5 </ b> A of the upper end 3 </ b> A to the upper end opening 7. Is formed. FIG. 4 shows an enlarged cross-sectional view of the periphery of the upper end portion 3A of the hook 3. In the hook 3, at least the peripheral wall portion 3 </ b> C in the vicinity of the upper end opening portion 7 extends substantially vertically, and preferably, the peripheral wall portion 3 </ b> C from the upper end opening portion 7 to the flange portion 4 extends substantially vertically. A so-called feather pot shape can be formed. In the cross-sectional view of FIG. 4, the hook inner peripheral surface 5A of the upper peripheral wall portion 3F extends substantially vertically from the bottom to the top and is slightly curved at the upper end portion 3A, and then linearly obliquely upward in a cross-sectional view due to the chamfered shape. A lid packing introduction portion 6 having a shape extending in a shape is formed. The contour of the upper end portion 3A of the hook 3 is slightly curved and reaches the upper end opening 7, and the outer peripheral surface 5B of the upper peripheral wall portion 3F extends substantially vertically from top to bottom. Therefore, the lid packing introducing portion 6 is configured as an inclined surface that expands toward the upper end opening 7 on the side of the inner peripheral surface 5 </ b> A near the upper end opening 7.

  The lid packing introduction part 6 expands to a radially outer position that is at least half the thickness of the upper peripheral wall part 3F. By doing so, the lid packing 33 can be smoothly inserted into the upper end opening 7 when the lid 20 is closed. In the example shown in FIG. 4, the lid packing introduction part 6 is expanded to the outside in the radial direction close to the wall thickness of the upper peripheral wall part 3 </ b> F, so that the lid packing 33 is opened at the upper end when the lid body 20 is closed. It can be inserted into the portion 7 very smoothly.

  A first modification of the lid packing introduction part 6 in the hook 3 will be described with reference to FIG. In the cross-sectional view of FIG. 5, the hook inner peripheral surface 5A of the upper peripheral wall portion 3F extends substantially vertically from the bottom to the top, and has a shape extending in an arc shape in a cross-sectional view by the R surface shape at the upper end portion 3A. A lid packing introduction part 6 is formed. The contour of the upper end 3A of the hook 3 reaches the upper end opening 7, and then the outer peripheral surface 5B of the upper peripheral wall 3F extends substantially vertically from top to bottom. Therefore, the lid packing introduction portion 6 is configured as a curved surface that expands in an arc shape toward the upper end opening 7 on the side of the inner peripheral surface 5 </ b> A near the upper end opening 7.

  The outline of the lid packing introduction part 6 of the first modified example is such that the center of the arc is located radially outside the position of half the thickness of the upper peripheral wall part 3F. By doing in this way, the circular arc can extend to the outside in the radial direction from a position that is half the thickness of the upper peripheral wall portion 3F, and the lid packing 33 is moved with respect to the upper end opening 7 when the lid 20 is closed. Can be inserted smoothly. The lid packing introducing portion 6 of the first modified example shown in FIG. 5 has an arc whose diameter is expanded to the outside in the radial direction close to the wall thickness of the upper peripheral wall portion 3F, so that the lid packing is closed when the lid 20 is closed. 33 can be inserted very smoothly into the upper end opening 7.

  A second modification of the lid packing introduction part 6 in the hook 3 will be described with reference to FIG. In the cross-sectional view of FIG. 6, the hook inner peripheral surface 5A of the upper peripheral wall portion 3F extends substantially vertically from the bottom to the top, curves slightly at the upper end portion 3A, and then linearly extends obliquely upward in a cross-sectional view. An existing shape of the lid packing introduction portion 6 is formed. The contour of the upper end 3A of the hook 3 is slightly curved and then extends in parallel with the surface of the upper end opening 7, and extends linearly downward in a sectional view, and then the hook of the upper peripheral wall 3F. The outer peripheral surface 5B extends substantially vertically from top to bottom. Therefore, the lid packing introducing portion 6 is configured as an inclined surface that expands toward the upper end opening 7 on the side of the inner peripheral surface 5 </ b> A near the upper end opening 7.

  The outline of the lid packing introduction portion 6 of the second modification is expanded to a radially outer position that is at least half the thickness of the upper peripheral wall portion 3F. By doing so, the lid packing 33 can be smoothly inserted into the upper end opening 7 when the lid 20 is closed. The lid packing introduction portion 6 of the second modification shown in FIG. 6 has a diameter expanded to the outside in the radial direction close to the wall thickness of the upper peripheral wall portion 3F, so that the lid packing 33 is removed when the lid 20 is closed. It can be inserted very smoothly into the upper end opening 7. In addition, the portion of the lid packing introduction portion 6 having a shape that linearly extends obliquely upward on the hook inner peripheral surface 5A is parallel to the portion of the hook outer peripheral surface 5B that extends linearly obliquely downward. The shape of the hook 3 is formed by the upper end portion 3A of the upper peripheral wall portion 3F protruding outward in the radial direction while maintaining the thickness of the upper peripheral wall portion 3F.

  A third modification of the lid packing introduction part 6 in the hook 3 will be described with reference to FIG. In the cross-sectional view of FIG. 7, the thickness of the upper peripheral wall portion 3F is configured to be thicker than the thickness of the lower peripheral wall portion 3E. An open upper end opening 7 is formed on the upper surface of the upper end 3 </ b> A of the hook 3, and a lid packing introduction part 6 is formed from the inner peripheral surface 5 </ b> A of the upper end 3 </ b> A to the upper end opening 7. In the cross-sectional view of FIG. 7, the inner peripheral surface 5A of the upper peripheral wall portion 3F extends substantially vertically from the bottom to the top, curves slightly at the upper end portion 3A, and then straightens obliquely upward in a cross-sectional view due to the chamfered shape. A lid packing introduction portion 6 having a shape extending in a shape is formed. The contour of the upper end portion 3A of the hook 3 is slightly curved and reaches the upper end opening 7, and the outer peripheral surface 5B of the upper peripheral wall portion 3F extends substantially vertically from top to bottom. Therefore, the lid packing introducing portion 6 is configured as an inclined surface that expands toward the upper end opening 7 on the side of the inner peripheral surface 5 </ b> A near the upper end opening 7.

  The outline of the lid packing introduction part 6 of the third modified example expands to a radially outer side corresponding to the thickness of the lower peripheral wall part 3E. By doing so, the lid packing 33 can be smoothly inserted into the upper end opening 7 when the lid 20 is closed. The lid packing introducing portion 6 of the third modification shown in FIG. 7 has a diameter expanded to the outside in the radial direction close to the wall thickness of the upper peripheral wall portion 3F, so that the lid packing 33 is removed when the lid 20 is closed. It can be inserted very smoothly into the upper end opening 7.

  Next, the relationship between the lid packing introduction part 6 of the hook 3 and the lid packing 33 of the inner lid 30 in the rice cooker 1 according to the first embodiment will be described with reference to FIGS. The configuration of the lid packing 33 will be described in detail.

  In FIG. 8, the lid packing 33 is attached to the inner lid frame member 32 of the inner lid 30 so as to face the upper end opening 7 of the hook 3. The lid packing 33 is an annular body including a base end support portion 33E, a seal portion 33A, a tip curl portion 33B, and an upper tongue portion 33C, and is made of a material having elasticity and heat resistance, for example, silicone rubber. . The proximal end support portion 33E is attached to the inner lid frame member 32, extends downward, bends outward and extends, and then branches to the seal portion 33A and the upper tongue portion 33C.

  The seal portion 33A extends downward from the branch portion of the base end support portion 33E, and a distal end curl portion 33B that is slightly curved radially inward is formed at the distal end of the seal portion 33A. On the outer surface of the seal portion 33A, there is formed a contact seal surface 33D that constitutes a hermetic seal by elastically contacting the inner peripheral surface 5A located slightly below the upper end portion 3A. Yes. However, as shown in FIG. 8, the sealing portion 33A is not in contact with the inner peripheral surface 5A of the hook when the lid 20 is closed, as shown in FIG. During rice cooking, the contact seal surface 33D is sized and configured to contact the inner peripheral surface 5A of the hook to form the inner peripheral surface contact portion 8. The upper tongue-shaped portion 33C extends obliquely upward outward in the radial direction from the branch portion of the proximal end support portion 33E.

  When the lid 20 is closed, the tip curl portion 33B moves downward while sliding along the lid packing introduction portion 6 formed on the upper end portion 3A of the hook 3 and the hook inner peripheral surface 5A. With the downward movement of the tip curl portion 33B, the seal portion 33A is introduced into the hook 3 and faces the hook inner peripheral surface 5A of the upper peripheral wall portion 3F positioned below the upper end portion 3A. At this time, as shown in FIG. 8, even after the lid 20 is closed, a slight gap is formed between the contact seal surface 33D of the seal portion 33A and the hook inner peripheral surface 5A of the upper peripheral wall portion 3F. Thus, the contact seal surface 33D is not in contact with the hook inner peripheral surface 5A. Since it is a non-contact state with a slight gap, the lid packing 33 can be smoothly inserted into the upper end opening 7, and the opening / closing operation of the lid 20 becomes smooth.

  The rice cooking operation is started in a non-contact state with a slight gap as shown in FIG. High-pressure steam is generated by heating during cooking. The lid packing 33 is expanded by heat and high-pressure steam generated by rice cooking. Since the thermal expansion coefficient of the lid packing 33 is larger than the thermal expansion coefficient of the pot 3, the outer dimension of the lid packing 33 is larger than the outer dimension of the pot 3 during rice cooking. As a result, as shown in FIG. 9, the contact seal surface 33 </ b> D moves largely radially outward from the inner peripheral surface 5 </ b> A, and the contact seal surface 33 </ b> D that has been non-contact before starting rice cooking is Then, it comes into elastic contact with the inner peripheral surface 5A of the hook on the entire circumference. Therefore, a hermetic seal is formed by the inner peripheral surface contact portion 8 between the contact seal surface 33D of the seal portion 33A and the inner peripheral surface 5A of the upper peripheral wall portion 3F.

  When the rice cooking operation is finished and the temperature and pressure in the pot 3 are lowered, the lid packing 33 contracts more than the pot 3. Therefore, a slight gap as shown in FIG. 8 is formed again between the contact seal surface 33D of the seal portion 33A and the inner peripheral surface 5A of the upper peripheral wall portion 3F so as to be in a non-contact state. The opening / closing operation 20 is smoothly performed.

  Next, a second embodiment will be described with reference to FIGS. The second embodiment is different from the first embodiment described above in that the lid packing 33 has a folded shape.

  In FIG. 10, the lid packing 33 is an annular body including a base end support portion 33E, a seal portion 33A, and an upper tongue portion 33C, and is made of a material having elasticity and heat resistance, for example, silicone rubber. The proximal end support portion 33E is attached to the inner lid frame member 32, extends downward, and then is folded upward to form a seal portion 33A extending upward.

  The seal portion 33A extends upward from the folded portion of the base end support portion 33E. A tip curl portion 33B extending obliquely upward radially outward is formed at the tip of the seal portion 33A and abuts on the lid packing introduction portion 6 of the upper end portion 3A. On the outer surface of the seal portion 33A, there is formed a contact seal surface 33D that constitutes a hermetic seal by elastically contacting the inner peripheral surface 5A located slightly below the upper end portion 3A. Yes. When the lid 20 is closed, the seal portion 33A is not in contact with the inner peripheral surface 5A of the hook, whereas the contact seal surface 33D is not in contact with the inner peripheral surface 5A during cooking. It is sized and configured to form an inner peripheral surface contact portion 8 in contact with 5A.

  When the lid body 20 is closed, the folded portion of the base end support portion 33E moves downward while sliding along the lid packing introduction portion 6 formed on the upper end portion 3A of the hook 3 and the inner peripheral surface 5A of the hook. To do. With the downward movement of the folded portion of the base end support portion 33E, the seal portion 33A is introduced into the hook 3 and faces the hook inner peripheral surface 5A of the upper peripheral wall portion 3F positioned below the upper end portion 3A. become. At this time, as shown in FIG. 10, a slight gap is formed between the contact seal surface 33D of the seal portion 33A and the hook inner peripheral surface 5A of the upper peripheral wall portion 3F. It is not in contact with the inner peripheral surface 5A. Since it is a non-contact state with a slight gap, the lid packing 33 can be smoothly inserted into the upper end opening 7, and the opening / closing operation of the lid 20 becomes smooth.

  The rice cooking operation is started in a non-contact state with a slight gap as shown in FIG. High-pressure steam is generated by heating during cooking. The lid packing 33 is expanded by heat and high-pressure steam generated by rice cooking. Since the thermal expansion coefficient of the lid packing 33 is larger than the thermal expansion coefficient of the pot 3, the outer dimension of the lid packing 33 is larger than the outer dimension of the pot 3 during rice cooking. As a result, as shown in FIG. 11, the contact seal surface 33 </ b> D moves largely outward in the radial direction from the inner peripheral surface 5 </ b> A, and the contact seal surface 33 </ b> D that has been non-contact before starting rice cooking is Then, it comes into elastic contact with the inner peripheral surface 5A of the hook on the entire circumference. Therefore, a hermetic seal is formed by the inner peripheral surface contact portion 8 between the contact seal surface 33D of the seal portion 33A and the inner peripheral surface 5A of the upper peripheral wall portion 3F.

  When the rice cooking operation is finished and the temperature and pressure in the pot 3 are lowered, the lid packing 33 contracts more than the pot 3. Therefore, a slight gap as shown in FIG. 10 is formed again between the contact seal surface 33D of the seal portion 33A and the hook inner peripheral surface 5A of the upper peripheral wall portion 3F so as to be in a non-contact state. The opening / closing operation 20 is smoothly performed.

  Next, a third embodiment will be described with reference to FIGS. In the third embodiment, the lid packing 33 is not in contact with the inner surface 5A of the hook just before the lid 20 is closed, as compared with the first embodiment described above. It is different in that it is configured to come into contact with the hook inner peripheral surface 5A when 20 is closed. Since the basic configuration of the lid packing 33 of the third embodiment is the same as that of the first embodiment, detailed description thereof is omitted.

  As shown in FIG. 12, in the seal portion 33A, immediately before the lid body 20 is closed, the contact seal surface 33D is not in contact with the hook inner peripheral surface 5A. However, as shown in FIG. 13, when the lid 20 is closed, the abutting seal surface 33D is in contact with the inner peripheral surface 5A of the hook on the entire periphery to form the inner peripheral surface contact portion 8. Has been. That is, immediately before closing the lid 20, as shown in FIG. 12, a slight gap is formed between the lower surface of the upper tongue 33 </ b> C and the lid packing introduction part 6 of the upper end 3 </ b> A. In the process in which the seal portion 33A is completely introduced into the hook 3 and the lid body 20 is closed, the lid packing introduction portion 6 of the upper end portion 3A comes into contact with the lower surface of the upper tongue portion 33C and the lid packing 33 is lowered. (I.e., the upper end 3A moves upward), the upper tongue 33C is pushed up in the direction of the arrow.

  When the upper tongue portion 33C is pushed up in the direction of the arrow, a rotational force that rotates counterclockwise around the branch portion of the base end support portion 33E acts on the seal portion 33A, and the seal portion 33A acts on the upper peripheral wall portion 3F. It is pressed toward. As a result, the contact seal surface 33D that has been non-contact immediately before the lid 20 is closed comes into elastic contact with the inner circumferential surface 5A of the hook. Therefore, a hermetic seal is formed by the inner peripheral surface contact portion 8 between the contact seal surface 33D of the seal portion 33A and the inner peripheral surface 5A of the upper peripheral wall portion 3F.

  In order to facilitate understanding of the present invention, the description has been made using specific configurations and numbers, but the present invention is not limited to the specific configurations and numbers of the above-described embodiments, Various modifications that can be considered without departing from the scope of the claims can be included. For example, the lid packing introduction portion 6 is configured by combining a shape (shown in FIG. 4) that extends linearly and obliquely upward in a cross-sectional view with a shape (shown in FIG. 5) that extends in an arc shape. It can be. That is, the lid packing introduction portion 6 has a configuration in which the former shape is formed on the inner peripheral surface 5A side and the latter shape is formed on the outer peripheral surface 5B side, and the former shape is formed on the outer peripheral surface 5B side. And the latter shape can be formed on the side of the inner surface 5A of the hook.

  Further, the inner lid 30 may be configured to include an inner lid cover or the like that is detachably or fixedly attached to the hook 3 side of the inner lid 30. The two pressure regulating valves, the first pressure regulating valve 35 and the second pressure regulating valve 36, are mounted on the inner lid 30, but only one pressure regulating valve may be mounted on the inner lid 30.

DESCRIPTION OF SYMBOLS 1 Rice cooker 3 Pot 3A Upper end part 3B Bottom part 3C Circumferential wall part 3D Ridge part 3E Lower peripheral wall part 3F Upper peripheral wall part 3L Lower container part 3U Upper container part 4 Gutter part 5A Pot inner peripheral surface 5B Pot outer peripheral surface 6 Lid packing introduction part 7 Upper end Opening portion 8 Inner peripheral surface contact portion 10 Rice cooker body 11L Lower housing portion 11U Upper housing portion 12 Body 13 Bottom body 14 Shoulder body 17 Hinge connection portion 17A Hinge spring 18 Induction heating coil 20 Lid body 21 Upper plate 22 Lower plate 23 Opening operation Member 24 Heat radiation plate 27 Lid hook 27A Hook claw 27B Hook receiving part 29 Steam unit 30 Inner lid 32 Inner lid frame member 33 Lid packing 33A Sealing part 33B Tip curl part 33C Upper tongue part 33D Contact seal surface 33E Base end support part 34 Inner lid plate 36 2nd pressure regulation valve 41 Protective frame 42 Lower inner trunk 42A Upper surface heating part (saddle heating part)
42B Lower side heating unit 43 Lower body heater 45 Main body reinforcing plate (reinforcing member)
48 Lid Reinforcement Plate 50 鍔 Support Member 50A 鍔 Support Portion 50B Lower Inner Cylinder Support Unit 51 鍔 Lower Heater 62 Upper Inner Cylinder 62B Upper Side Heating Unit 63 Upper Drum Heater

Claims (4)

A bottomed cylindrical hook having an upper end opening and an annular flange provided on a peripheral wall part below the upper end opening;
A rice cooker body having a heel support portion at the top for suspending the heel portion;
A lid that covers the top of the kettle and is arranged to be openable and closable on the rice cooker body;
A lid packing attached to the lid so as to face the upper end opening of the pot, and a rice cooker comprising:
In the shuttle, at least the peripheral wall portion in the vicinity of the upper end opening extends substantially vertically,
The said cooker is a pressure type rice cooker provided with the lid packing introduction part comprised so that a diameter could be continuously expanded to the said upper end opening part in the side of the hook inner peripheral surface in the vicinity of the said upper end opening part. 2. The pressure rice cooker according to claim 1 , wherein the lid packing introducing portion expands to a radially outer position that is half or more of a wall thickness of an upper peripheral wall portion located above the collar portion. In Claim 1 or 2 , The thickness of the upper peripheral wall part located above the said collar part is thicker than the thickness of the lower peripheral wall part located below the said collar part, The pressure type rice cooker. 2. The pressure rice cooker according to claim 1 , wherein the lid packing introduction part is formed by the peripheral wall part in the vicinity of the upper end opening projecting radially outward.

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