JP2018042830A - Cooker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cooking cooker capable of ensuring high airtightness of a cooking pot and improving workability of a sealing operation. A heating cooker 100 has a cooking pot 11 having an opening 11a and a flange portion 11b, an inner lid 20, a lid packing 40, and an annular fixing member 50, and the flange portion 11b has an annular fixing member 50. A first flange portion 110a extending radially outward from the peripheral edge of the opening 11a, having a shape continuous in the circumferential direction of the opening 11a, and having a first width A in the radial direction, and a first flange. A plurality of portions extending radially outward from the outer periphery of the portion 110a, provided on a part of the circumferential direction of the first flange portion 110a, and having a second width B having a length equal to or less than the first width A in the radial direction. It has a second flange portion 110b. [Selection diagram] Fig. 2

Description

  The present invention relates to a cooking device, and more particularly to a structure for sealing an opening of a cooking pan.

  Conventionally, in a cooking device, the lid engaging part is engaged with the pan engaging part by rotating the lid by operating the lid rotating means, the lid and the cooking pan are engaged, and the lid and the cooking pan are locked. There is. For example, Patent Document 1 discloses that a plurality of spaced engagement pieces (lid locking portions) provided on the side wall of the lid body are a plurality of spaced engagement pieces (pan locking) provided on the opening periphery of the main body container. And a pressure cooker that seals the two together.

JP-A-1-230316 (for example, FIG. 2 and FIG. 3, claim 1)

  In such a heating cooker, an important point at the time of cooking is to ensure a high sealing property (watertightness) between the lid and the cooking pan, and in order to ensure a high sealing property (watertightness) It is important to ensure a wide contact area between the flange provided on the peripheral edge and the packing (lid packing) provided on the lid.

  On the other hand, when performing the sealing operation, the lid locking portion provided on the lid is aligned with the flange portion other than the pan locking portion provided on the cooking pan, and then rotated and locked. However, since the sliding resistance occurs in the part where the lid locking part and the pot locking part overlap, if the part (area) where the lid locking part and the pot locking part overlap is large, There was a problem that a large force was required to rotate the lid, and the workability of the rotating operation was reduced.

  The present invention has been made to solve the above-described problems of the prior art, and provides a heating cooker that can ensure high sealing performance of a cooking pan and improve workability of sealing operation. Objective.

  A cooking device according to the present invention includes a cooking pot having a circular opening, a flange extending radially outward from a peripheral edge of the opening, an inner lid that closes the opening, A lid packing that seals between an outer peripheral portion of the lid and the flange portion of the cooking pan; an annular fixing member that sandwiches and fixes the flange portion, the inner lid, and the lid packing; The flange portion extends radially outward from the peripheral edge of the opening, has a shape continuous in the circumferential direction of the opening, and has a first flange portion having a first width in the radial direction; The second flange portion extending from the outer periphery of the first flange portion to the outer side in the radial direction, provided in a part of the circumferential direction of the first flange portion, and having a length equal to or less than the first width in the radial direction. And a plurality of second flange portions having a width of.

  According to the heating cooker which concerns on this invention, while ensuring the high sealing performance of a cooking pot, the workability | operativity of sealing operation can be improved.

It is sectional drawing which shows schematic structure of the heating cooker which concerns on embodiment of this invention. (A) is a perspective view which shows the schematic structure of the heating cooker which concerns on this Embodiment, (b) is a perspective view which shows the schematic structure of the cooking pan in this Embodiment. It is a disassembled perspective view which shows the schematic structure of the principal part of the heating cooker which concerns on this Embodiment. (A) is a bottom view which shows the schematic structure of the lock ring in this Embodiment, (b) is a top view which shows the schematic structure of the lock operation part in this Embodiment. It is a figure which shows roughly an example of a structure of the control system of the heating cooker which concerns on this Embodiment. (A) And (b) is a figure for demonstrating operation | movement of the heating cooker which concerns on this Embodiment. (A) shows a case where the lock ring is in a released state, and (b) shows a case where the lock ring is in a locked state. It is a top view which expands and shows the schematic structure of the flange part of the cooking pan in this Embodiment. (A) And (b) is an expanded sectional view of the flange part periphery in this Embodiment. (A) has shown the expanded cross section around the 1st flange part, (b) has shown the expanded cross section around the 2nd flange part.

Embodiment.
<< 1 >> Configuration FIG. 1 is a cross-sectional view showing a schematic configuration of a heating cooker 100 according to an embodiment of the present invention. Fig.2 (a) is a perspective view which shows schematic structure of the heating cooker 100 which concerns on this Embodiment, FIG.2 (b) shows schematic structure of the cooking pan 11 in this Embodiment. It is a perspective view shown. FIG. 3 is an exploded perspective view showing a schematic configuration of a main part of heating cooker 100 according to the present embodiment. The heating cooker 100 is, for example, a pressure cooker, a pressure cooker, a pressure cooker, and a heating pressure cooker.

  As shown in FIGS. 1 to 3, the cooking device 100 includes, as main components, an apparatus main body 10, a cooking pan (cooking container) 11, an inner lid 20, an outer lid 30, and a lid packing 40. And a lock ring 50. The cooking pan 11 is a pan-like container having an opening 11a on the upper surface, and for example, a clad material made of a magnetic material such as a stainless steel layer and a material layer excellent in heat conduction such as aluminum or copper is pressed. Made by processing.

  As shown in FIGS. 2A and 2B, the cooking pan 11 has a flange portion 11 b that extends radially outward from the peripheral edge of the opening 11 a. The flange portion 11b includes a first flange portion 110a and a second flange portion 110b. The 1st flange part 110a is a part formed so that it might extend toward the outer side of radial direction from the peripheral part of the opening part 11a of the cooking pan 11. As shown in FIG. The first flange portion 110 a has a shape (annular shape) that is continuous in the circumferential direction of the opening portion 11 a of the cooking pan 11.

  As shown in FIGS. 2A and 2B, the second flange portion 110b is a portion formed so as to extend from the outer periphery of the first flange portion 110a toward the outside in the radial direction. The second flange portions 110b are arranged (equally arranged) at six equal intervals in the circumferential direction of the first flange portion 110a. As shown in FIG. 2B, the flange portion 11b (including the first flange portion 110a and the second flange portion 110b) of the cooking pan 11 has a petal shape in plan view. Note that the number of the second flange portions 110b is not limited to six.

  As shown in FIG. 1, the heating cooker 100 includes a container cover 12 fixed inside the apparatus main body 10. The cooking pan 11 is detachably accommodated in the container cover 12. The heating cooker 100 includes a heating coil 13 as a heating unit for heating disposed outside the container cover 12. The heating coil 13 is turned in a spiral shape, for example, and a high frequency current is supplied to the heating coil 13. The cooking pan 11 generates heat due to an induction current generated by electromagnetic induction by the heating coil 13. The heating method of the heating unit is not limited to the above example, and other heating methods such as a resistance heating method and a heating method other than electric power (for example, heating by gas combustion) may be used.

  As shown in FIG. 1, the heating cooker 100 compresses the pan bottom temperature sensor 14 provided through the hole formed at the center position of the bottom of the container cover 12 and the bottom surface of the pan bottom temperature sensor 14. And a spring 14a. The temperature information (detection signal) obtained from the pan bottom temperature sensor 14 is used for energization control of the heating coil 13, and controls the heated object (not shown in FIG. 1) accommodated in the cooking pan 11 to an appropriate temperature. It becomes possible to do. The object to be heated is, for example, food such as rice and water, meat, vegetables and water.

  As shown in FIG. 1, the heating cooker 100 has an operation display unit 15 installed on the side surface of the container cover 12. The operation display part 15 is a touch panel as an input part for a user to start or set operation | movement of the heating cooker 100, for example. However, the operation display unit 15 may have a display unit and an input unit arranged separately. The user stores the cooking pan 11 in the container cover 12, closes the outer lid 30, and then sets the type of cooking by selecting a menu using the input keys arranged on the operation display unit 15. In addition, the start of cooking can be instructed. The contents of the menu selection include, for example, arbitrary designated cooking such as boiled food and soup, the temperature of the cooking pan during heating, the time of heating, and the pressure in the cooking pan during heating.

  As shown in FIG. 1, a grip 16 may be provided on the outer peripheral surface of the cooking pan 11 of the heating cooker 100. The gripping part 16 is a member for safely gripping the cooking pan 11, and the heat of the cooking pan 11 main body is difficult to be transmitted. As a result, the gripping part 16 may be formed of a heat-resistant resin material that is a material that does not easily rise in temperature. desirable. As shown in FIG. 1, the gripping portion 16 is configured and arranged so that a predetermined gap is formed between the gripping portion 16 and the container cover 12. Thereby, the temperature of the holding part 16 at the time of taking out the cooking pan 11 can be suppressed, and a sufficiently large space for the fingers to enter under the holding part 16 can be created.

  As shown in FIG. 1, the heating cooker 100 has an inner lid 20 as a lid that closes the opening 11 a of the cooking pan 11. As shown in FIG. 3, the inner lid 20 has a disk shape, and a concave portion 20a is formed in the central portion. Moreover, the cover packing 40 as a sealing material is provided in the peripheral part of the inner cover 20 of the cooking device 100. The lid packing 40 abuts on the outer peripheral portion of the inner lid 20 and the flange portion 11 b of the cooking pan 11 and is provided to seal between the inner lid 20 and the cooking pan 11. As shown in FIG. 3, the lid packing 40 has an annular shape as a whole, the inner diameter of the lid packing 40 substantially matches the outer diameter of the inner lid 20, and the outer diameter of the lid packing 40 is the diameter of the flange portion 11 b. Generally agrees with By providing the lid packing 40, it is possible to improve the sealing property (watertightness) between the flange portion 11b of the cooking pan 11 and the inner lid 20 during cooking.

  As shown in FIG. 1, the inner lid 20 includes a steam discharge port (communication hole) 21 that communicates the inside 11 e (a space for storing an object to be heated) of the cooking pan 11 and the outside (atmosphere space). . The cooking device 100 includes a steam discharge valve 22 that is movable with respect to the inner lid 20 and serves as a valve body that adjusts the opening and closing of the steam discharge port 21. The steam discharge valve 22 is driven by the driving means 33. The steam discharge valve 22 is, for example, a weight-type valve body, and the weight-type valve body does not move within a range in which the internal pressure of the cooking pan 11 does not exceed a predetermined pressure. It is a mechanism to close. When the internal pressure of the cooking pan 11 is within a predetermined pressure range, the driving means 33 forcibly displaces the weight type valve body to control the opening and closing of the steam discharge port 21 to discharge and discharge steam. Carry out the stop.

  As shown in FIG. 1, the inner lid 20 may be provided with a lid temperature sensor 23 as a detection unit for detecting the temperature in the cooking pan 11. The lid temperature sensor 23 can detect the temperature of an object to be heated (foodstuff, water, etc.) inside the cooking pot 11. The lid temperature sensor 23 includes, for example, a thermistor that measures the temperature in the cooking pan 11. Note that the installation position, the number, and the detection principle of the lid temperature sensor 23 are not limited to the above example.

  As shown in FIG. 1, the heating cooker 100 includes an outer lid 30 that covers the apparatus main body 10 and the inner lid 20. As shown in FIG. 2A, the outer lid 30 is attached to the apparatus main body 10 so as to be openable and closable. The outer lid 30 has a function of suppressing generation of steam by closing the cooking pan 11 housed in the apparatus main body 10 and performing heating, thereby suppressing heat leakage during heating.

  As shown in FIG. 1, the outer lid 30 has an external steam port 31 as a through hole that penetrates the outer lid 30. The external steam port 31 communicates with the steam discharge port 21 of the inner lid 20. Therefore, the inside 11 e of the cooking pan 11 can communicate with the outside (atmospheric space) via the steam discharge port 21 provided in the inner lid 20 and the external steam port 31 provided in the outer lid 30. . A cartridge 32 is provided in the external steam port 31 of the outer lid 30. The cartridge 32 has a function of weakening the momentum of the steam ejected from the steam discharge port 21 provided in the inner lid 20.

  As shown in FIG. 1, the outer lid 30 is provided with a decompression pump (P) 35 that reduces the pressure in the cooking pan 11. By having the decompression pump 35, the high internal pressure in the cooking pan 11 at the time of cooking can be quickly decompressed after the pressure cooking. Moreover, by reducing the pressure from normal pressure (for example, immediately after the start of cooking), the oxygen in the cooking pan 11 is expelled by the decompression pump 35 and the oxidation of the heated object accommodated in the cooking pan 11 is suppressed. Can do. In addition, by repeatedly changing the pressure in the cooking pan 11 between the reduced pressure state and the normal pressure state by the reduced pressure pump 35, the taste can be infiltrated into the object to be heated (foodstuff, water, etc.).

  As shown in FIG. 1, the cooking device 100 includes a lock ring 50 as a fixing member so as to sandwich the inner lid 20, the lid packing 40, and the flange portion 11 b of the cooking pan 11. . As shown in FIG. 3, the lock ring 50 has an annular shape as a whole.

  FIG. 4A is a bottom view showing a schematic configuration of the lock ring 50 in the present embodiment. FIG. 4A shows a view of the lock ring 50 in FIG. 3 as viewed downward. As shown in FIG. 4A, the lock ring 50 is formed with a notch hole 52 formed by notching a part of the lock ring 50. In the example shown in FIG. 4A, six cutout holes 52 are formed at equal intervals in the circumferential direction.

  As shown in FIG. 4A, the lock ring 50 is formed with a lock flange 51 that protrudes inward in the radial direction of the lock ring 50. In the example shown in FIG. 4A, six lock flanges 51 are formed at equal intervals in the circumferential direction. The lock flange 51 is formed at a position corresponding to the notch hole 52 (a position overlapping in the vertical direction in FIG. 3). The lock flange 51 and the second flange portion 110b of the cooking pan 11 are engaged (fitted) with each other. That is, the lock flange 51 is an engaging portion of the lock ring 50, and the lock ring 50 can be fixed to the cooking pan 11 by engaging the lock flange 51 with the second flange portion 110 b of the cooking pan 11. .

  FIG. 4B is a top view showing a schematic configuration of the lock operation unit 36 in the present embodiment. FIG. 4B shows a view of the outer lid 30 in FIG. 1 as viewed upward. As shown in FIG. 4B, an arc-shaped long groove 30 a is formed on the upper surface of the outer lid 30. Further, a lock operation unit 36 for operating the lock ring 50 from the outside is provided on the upper surface of the outer lid 30. The lock operation part 36 is movable along an arcuate long groove 30a formed in the outer lid 30 and extending in the circumferential direction with its tip connected to the lock ring 50.

  The user rotates the lock ring 50 in the circumferential direction of the flange portion 11b by operating the lock operation portion 36, and locks the lock flange 51 of the lock ring 50 to the second flange portion 110b. The ring 50 can be fixed to the cooking pan 11. By locking the lock flange 51 of the lock ring 50 to the second flange portion 110 b, the opening portion 11 a of the cooking pan 11 is firmly sealed by the inner lid 20. Although the case where the lock operation unit 36 is a slide type operation unit has been described, the lock ring 50 is transmitted to the lock ring 50 by a motor as a rotational force generating unit and a gear as a driving force transmission unit. You may employ | adopt the structure which rotates a lock ring. The shape, position, and structure of the manual lock operation unit 36 are not limited to the illustrated example, and various changes can be made.

  Next, the operation of the heating cooker 100 will be described with reference to FIG. FIG. 5 is a diagram schematically illustrating an example of a configuration of a control system of the cooking device 100 according to the present embodiment. As shown in FIG. 5, the control system of the heating cooker 100 includes a control unit 60, drive means 33 configured by a solenoid and a stepping motor, an inverter unit 61, and a temperature detection unit (the pan bottom temperature sensor 14 and A lid temperature sensor 23) and an operation display unit 15.

  When cooking is started by the heating cooker 100, the user puts an object to be heated such as food and water in the cooking pan 11, places the cooking pan 11 in the container cover 12, and then puts the outer lid 30 on. Close. When the outer lid 30 is closed, the lid packing 40 attached to the inner lid 20 is pressed against the flange portion 11 b of the cooking pan 11 and the inner surface of the cooking pan 11. The user moves the lock operation part 36 to engage the lock ring 50 and the second flange part 110 b of the flange part 11 b of the cooking pan 11. The space of the inside 11e of the cooking pan 11 is sealed by the lock ring 50. For example, when the user turns on the cooking start switch of the operation display unit 15, the heating cooker 100 starts the heating process of the cooking pan 11.

  After the start of cooking, information (detected temperature) obtained from the temperature detection unit including the pan bottom temperature sensor 14 and the lid temperature sensor 23 is input to the control unit 60. The controller 60 can control the internal pressure by driving the driving means 33 based on the input detected temperature, thereby controlling the opening and closing of the steam port 21 by moving the steam discharge valve 22.

  Further, a high frequency current is supplied to the heating coil 13 from the inverter unit 61, a high frequency magnetic field is generated, the heating coil facing surface of the cooking pan 11 magnetically coupled to the heating coil 13 is excited, and a vortex is formed on the bottom surface of the cooking pan 11. A current is induced. Joule heat is generated by the eddy current and the resistance of the cooking pan 11, and the bottom surface of the cooking pan 11 generates heat and is heated. The control unit 60 performs on / off control of the heating coil 13 based on information obtained from the temperature detection unit (the pan bottom temperature sensor 14 and the lid temperature sensor 23).

  If the contents in the cooking pan 11 boil, the steam-type valve body of the steam discharge valve 22 prevents the steam from being discharged, and the pressure in the cooking pan 11 rises. The upper limit value of the pressure applied to the inside 11e of the cooking pan 11 is set according to the opening area of the steam port 21 and the weight of the weight type valve body of the steam discharge valve 22 that closes the opening area. For example, if the pressure upper limit is determined by the weight of the steam discharge valve 22, the cooking pot 11 has a diameter of the steam port 21 of 1 mm and the weight of the weight-type valve body of the steam discharge valve 22 is 10 g. The upper limit of the pressure inside 11e is about 2.2 atmospheres. When the pressure in the cooking pan 11 reaches the set pressure upper limit value, the steam pressure pushes the weight type valve body of the steam discharge valve 22, and steam is discharged from the external steam port 31 to keep the pressure constant.

  When the pressure in the cooking pan 11 rises, an upward force is applied to the inner lid 20. However, since the inner lid 20 and the cooking pan 11 are sandwiched between the lock rings 50 and the displacement in the vertical direction is restricted, the inner lid 20 is opened even when the pressure in the cooking pan 11 is increased. Never do.

  After the heating process is finished and the cooling time has elapsed, when the internal pressure is reduced to the atmospheric pressure by the information and operation time of the detection unit or by opening the steam discharge valve 22, display on the operation display unit 15 or output of sound The end of the heating process is notified by, for example. The user performs a rotation operation on the side opposite to the time when the lock operation unit 36 is locked to release the engagement between the lock ring 50 and the cooking pan 11 and opens the inner lid 20.

  Hereinafter, the sealing process by the lock ring 50 will be described in more detail. 6 (a) and 6 (b) are diagrams for explaining the operation of the heating cooker 100 according to the present embodiment, and show a view of the heating cooker 100 of FIG. 1 as viewed upward. . FIG. 6A shows the case where the lock ring 50 is in the released state, and FIG. 6B shows the case where the lock ring 50 is in the locked state.

  Regions indicated by broken lines in FIGS. 6A and 6B indicate the flange portion 11b (the first flange portion 110a and the second flange portion 110b) of the cooking pan 11. As shown in FIGS. 6A and 6B, the cooking pan 11 includes a first flange portion 110 a extended with a uniform width outward from the peripheral edge of the opening 11 a of the cooking pan 11 in the radial direction. The second flange portion 110b is further extended from the outer periphery of the first flange portion 110a to the outside in the radial direction. As shown in FIGS. 6A and 6B, six second flange portions 110b are formed.

  A region indicated by a solid line in FIGS. 6A and 6B indicates the lock ring 50. As shown in FIGS. 6A and 6B, the lock ring 50 includes a lock flange 51 formed by cutting out a part of the lock ring 50. Six lock flanges 51 are formed in the circumferential direction of the lock ring 50.

  As shown in FIG. 6A, when the lock ring 50 is in an open state, the second flange portion 110b of the cooking pan 11 and the lock flange 51 of the lock ring 50 are in a positional relationship that does not overlap when viewed from above. Yes, the cooking pan 11 is in a position where it does not interfere with the lock ring 50 in the vertical direction (up and down direction in FIG. 1), so that the lock ring 50 can be easily fitted.

  After fitting the lock ring 50, the lock ring 50 is rotated in the circumferential direction by the lock operation unit 36, so that the lock ring 50 is in a locked state, and the state shown in FIG. As shown in FIG. 6B, the second flange portion 110b of the cooking pan 11 enters a position overlapping the lock flange 51 of the lock ring 50 in a top view, and the lock ring 50 and the cooking pan 11 are connected. It will be locked.

  FIG. 7 is a top view showing a schematic configuration of the flange portion 11b of the cooking pan 11 in the present embodiment. As shown in FIG. 7, in the flange portion 11b in the present embodiment, the radial width (first width) of the first flange portion 110a is A (mm), and the radial direction of the second flange portion 110b. When the maximum width (second width) of B is B (mm), it is desirable that the relationship of A ≧ B is satisfied (B is a length equal to or shorter than A).

  By securing a large width A, the contact area between the lid packing 40 and the flange portion 11b of the cooking pan 11 can be increased in a horizontal plane, and in either case of pressurization or decompression in the cooking pan 11 In addition, high hermeticity (watertightness) can be ensured. Moreover, in the manufacturing process of the 1st flange part 110a of the cooking pan 11, although the concave accommodating part of the cooking pan 11 which is an accommodating part of a to-be-heated material is formed by press work, if it is a structure of A> = B, There is an advantage that processing is easy both before and after pressing.

As shown in FIG. 7, the second flange portion 110b has an outer periphery made up of a curved portion C (first curved portion) in a plan view at a connection portion with the first flange portion 110a. The second flange portion 110b has an outer periphery formed of a curved portion E (second curved portion) in a plan view at the center portion of the second flange portion 110b. In addition, the second flange portion 110b has an outer periphery formed of a curved portion D (third curved portion) between the curved portion C and the curved portion E. When the radius of curvature in the curved portion C is C _R , the radius of curvature in the curved portion D is D _R , and the radius of curvature in the curved portion E is E _R , the radius of curvature C _R , the radius of curvature D _R , and the radius of curvature E _R are C Satisfies the relationship of _R ≦ D _R ≦ E _R.

By setting as large as possible the curvature radius C _R, positional tolerance dimensional when fitting the flange portion 11b on the locking ring 50 is increased, the positioning of the lock ring 50 against the flange portion 11b can be easily performed . The radius of curvature _{C R,} for example, it is desirable to set the range of R20～25 (i.e., within the range of 20mm to 25 mm).

Radius of curvature D _R, by reducing the engagement area or a sliding portion of the locking flange 51 of the lock ring 50, so that to suppress a reaction force at the time of rotation of the lock ring 50 is set somewhat smaller It is desirable. Radius of curvature _{D R,} for example, R10 or (i.e., 10 mm or more) is preferably a in the range of R25～30 (i.e., from 25mm in the range of 30 mm) and more preferably set to.

The radius of curvature E _R, when too small, because it may cause discomfort (slight pain) to the user's finger, a radius of curvature greater than the radius of curvature C _R and D _R R60~65 It is desirable to set within the range (that is, within the range of 60 mm to 65 mm).

As described above, since the relationship is C _R ≦ D _R ≦ E _R , the second flange portion 110b becomes smaller toward the outside of the circumference. That is, as the outer side of the circumference is approached, the second flange portion 110b becomes smaller, so that the space for the lock flange 51 to enter becomes larger. As a result, even if the lock ring 50 has a shape with a dimensional deviation in the circumferential direction due to individual variations during manufacture, the lock flange 51 can be inserted with a large margin.

Also, a combination of the radius of curvature C _R and the curvature radius D _R and the radius of curvature E _R, the second flange portion 110b has a petal shape as a pointed tip at gentle curve. The shape of the second flange portion 110b of the present embodiment is a bayonet-type lock structure which is a method of rotating and fixing after fitting a claw portion close to a rectangle and a concave portion close to a rectangle like gear teeth. Are greatly different and can give a soft impression and design.

  Since the fitting of the lock ring 50 with the lock flange 51 becomes the second flange portion 110b, the portion of overlap (the overlapping portion) is small. However, the outer lid 30 and the container cover 12 are closed, the lid packing 40, the inner lid 20, and the cooking pan 11 ensure watertightness, and the material and thickness of the cooking pan 11 and the inner lid 20 are secured. Can be set to a structure having sufficiently large fatigue strength, so there is no problem as a structure of the heating cooker. In addition, since the hooking portion is small, it is easy to align the lock work, and the rotational force can be suppressed.

  Next, the positional relationship among the flange portion 11b of the cooking pan 11, the inner lid 20, the lid packing 40, and the lock ring 50 will be described with reference to FIGS. 8 (a) and 8 (b). 8 (a) and 8 (b) are enlarged sectional views around the flange portion 11b in the present embodiment, and FIG. 8 (a) shows an enlarged sectional view around the first flange portion 110a. FIG. 8B shows an enlarged cross section around the second flange portion 110b.

  As shown in FIGS. 8A and 8B, the lid packing 40 has a horizontal portion 41, a vertical portion 42, and an inner lid abutting portion 43. As shown in FIG. 8A, the horizontal portion 41 of the lid packing 40 is arranged in a positional relationship covering the entire surface of the first flange portion 110 a of the cooking pan 11. The horizontal portion 41 of the lid packing 40 is a seal member (first seal member) that contacts the flange portion 11b and seals the contact portion. Since the lid packing 40 has the horizontal portion 41, the lid packing 40 and the flange portion 11 b of the cooking pan 11 are reliably brought into contact with each other at the horizontal portion 41 of the lid packing 40, and the cooking pan 11 side can be sealed. . Further, since the horizontal portion 41 of the lid packing 40 moves in a direction in which the cooking pan 11 is attracted to the first flange portion 110a when the cooking pan 11 is decompressed by the decompression pump 35, high sealing performance is maintained over the entire circumference of the cooking pan 11. Meanwhile, the pressure in the cooking pan 11 can be reduced and the pressure can be reduced.

  If the width of the horizontal portion 41 of the lid packing 40 is equal to or shorter than the width A of the first flange portion 110a of the cooking pan 11, the lid is placed on the first flange portion 110a of the cooking pan 11. The part where the packing 40 is sealed horizontally is narrowed, the water tightness is lowered, and the packing is easily drawn when the internal pressure of the cooking pan 11 is lowered. Therefore, as shown in FIG. 8A, the width F (third width) of the horizontal portion 41 of the lid packing 40 is equal to the width A (first width) of the first flange portion 110 a of the cooking pan 11. It is desirable to set it as the above length.

  As shown in FIG. 8A, the vertical portion 42 of the lid packing 40 is formed to extend in a direction from the horizontal portion 41 toward the pan bottom of the cooking pan 11. The vertical portion 42 of the lid packing 40 is a seal member (second seal member) that is deformed so as to come into contact with the inner wall 11 f of the cooking pan 11. The vertical portion 42 of the lid packing 40 falls in a direction approaching the inner wall 11f of the cooking pan 11 as the internal pressure of the cooking pan 11 increases, and comes into contact with the inner wall 11f of the cooking pan 11. Thereby, the sealing performance of the cooking pan 11 is enhanced and the internal pressure is maintained.

  As shown in FIG. 8A, the inner lid abutting portion 43 of the lid packing 40 abuts the inner lid 20 so as to sandwich the outer peripheral portion 20b of the inner lid 20, and the lid packing 40 is attached to the inner lid 20. And has the function of fixing.

  Further, as shown in FIG. 8B, the second flange portion 110 b of the cooking pan 11 is extended to a position overlapping with the lock ring 50 in the vertical direction. Thereby, even if the cooking pan 11 or the inner lid 20 changes its shape due to the internal pressure, the lock ring 50 is not detached from the cooking pan 11 and the locked state can be maintained.

<< 2 >> Effect According to the heating cooker 100 according to the present embodiment, the flange portion 11b of the cooking pan 11 has the first flange portion 110a. The lid packing 40 has a horizontal portion 41, and the horizontal portion 41 of the lid packing 40 is arranged in a positional relationship covering the entire surface of the first flange portion 110 a of the cooking pan 11. Thereby, the contact area of the flange part 11b and the lid packing 40 is ensured sufficiently large, and the high airtightness (watertightness) at the time of heat cooking can be ensured.

  Moreover, the flange part 11b of the cooking pan 11 has the 2nd flange part 110b, and the width B (mm) of the radial direction of the 2nd flange part 110b is the width A of the radial direction of the 1st flange part 110a. It is comprised so that it may become the length below (mm). As a result, the contact area between the second flange portion 110b and the lock flange 51 of the lock ring 50 can be suppressed, the sliding resistance during the rotation operation can be suppressed, and the force required for the locking operation can be reduced. The workability of operation can be improved. Therefore, both high sealing performance (water tightness) and workability (easy operation) can be achieved.

According to the heating cooker 100 according to the present embodiment, the second flange portion 110b has the curved portion C, the curved portion D, and the curved portion E, the radius of curvature of the curved portion C is _CR , and the curved portion. When the radius of curvature at D is D _R and the radius of curvature at the curved portion E is E _R , the radius of curvature C _R , the radius of curvature D _R , and the radius of curvature E _R satisfy the relationship of C _R ≦ D _R ≦ E _R. Moreover, the flange part 11b (the 1st flange part 110a and the 2nd flange part 110b) of the cooking pan 11 is petal type shape by planar view. Thereby, compared with the bayonet-type lock structure which made the nail | claw part corresponding to a 2nd flange part the simple rectangular shape, there exists an effect that it is hard to generate | occur | produce a crack etc. and is excellent in intensity | strength.

  Further, the end of the second flange portion 110b is not sharp, and there is an effect that it is difficult to give discomfort and pain when touched by the user's finger.

  Further, since the flange portion 11b has a petal shape, the user does not recognize the flange portion 11b as a machine part, but has an effect that the user can easily recognize the flange portion 11b as one of kitchen utensils excellent in design.

  According to the heating cooker 100 according to the present embodiment, the lid packing 40 has the horizontal portion 41, and the width F (third width) of the horizontal portion 41 of the lid packing 40 is the first of the cooking pan 11. It is the length more than the width A (1st width) of the flange part 110a. Thereby, the lid packing 40 and the flange part 11b of the cooking pot 11 are reliably contacted by the horizontal portion 41 of the lid packing 40, and the cooking pot 11 side can be reliably sealed.

  According to the heating cooker 100 according to the present embodiment, the lid packing 40 has the vertical portion 42, and the vertical portion 42 of the lid packing 40 increases the inner wall of the cooking pan 11 as the internal pressure of the cooking pan 11 increases. It falls in a direction approaching 11 f and comes into contact with the inner wall 11 f of the cooking pan 11. Thereby, the sealing performance of the cooking pan 11 is enhanced and the internal pressure is maintained.

<< 3 >> Modifications The shape and arrangement of the apparatus main body 10, the container cover 12, the heating coil 13, and the cooking pan 11, and the heating method of the heating coil 13 are not limited to the examples described in the above embodiment.

  Moreover, this invention is applicable also to the apparatus (for example, pressure cooker) which is not provided with the heating part (for example, heating coil 13). In this case, the cooking pan 11 is heated by a heating device different from the heating cooker 100.

  In the above-described embodiment, the lid packing 40 is mounted on the inner lid 20, but may be installed alone without being mounted on the inner lid 20. This facilitates cleaning of the component parts. In any case, it is desirable that the lid packing 40 has a structure that can be easily detached from the cooking pan 11 so as to be washable and replaceable.

  In the above-described embodiment, the configuration including the six second flange portions 110b (six pieces) is shown, but the present invention is not limited to this, and other structures that can be engaged with the lock ring 50 may be used. For example, when the lock flange 51 of the lock ring 50 is provided at four locations, the second flange portions 110b may be arranged at four locations at corresponding positions.

  DESCRIPTION OF SYMBOLS 10 apparatus main body, 11 cooking pan, 11a opening part, 11b flange part, 11e inside, 11f inner wall, 12 container cover, 13 heating coil, 14 pan bottom temperature sensor, 14a compression spring, 15 operation display part, 16 grip part, 20 inside Lid, 21 Steam port, 22 Steam discharge valve, 23 Lid temperature sensor, 30 Outer lid, 31 External steam port, 32 Cartridge, 33 Driving means, 35 Pressure reducing pump, 36 Lock operation unit, 40 Lid packing, 41 Horizontal part, 42 Vertical part, 43 Inner lid contact part, 50 Lock ring, 51 Lock flange, 52 Notch hole, 60 Control part, 61 Inverter part, 100 Heat cooker, 110a 1st flange part, 110b 2nd flange part.

Claims (9)

A cooking pot having a circular opening, and a flange extending radially outward from the peripheral edge of the opening;
An inner lid that closes the opening;
A lid packing that seals between the outer peripheral portion of the inner lid and the flange portion of the cooking pan;
An annular fixing member that sandwiches and fixes the flange portion, the inner lid, and the lid packing;
The flange portion is
A first flange portion extending radially outward from the peripheral edge of the opening, having a shape continuous in the circumferential direction of the opening, and having a first width in the radial direction;
The second flange portion extends from the outer periphery of the first flange portion to the outer side in the radial direction, is provided in a part of the circumferential direction of the first flange portion, and has a length equal to or less than the first width in the radial direction. A cooking device having a plurality of second flange portions having a width.   The heating cooker according to claim 1, wherein the plurality of second flange portions are arranged at equal intervals in a circumferential direction of the first flange portion. The fixing member has a plurality of lock flanges protruding radially inward of the fixing member at positions corresponding to the plurality of second flange portions,
The cooking device according to claim 1 or 2, wherein the plurality of lock flanges and the plurality of second flange portions engage with each other. Each of the plurality of second flange portions is
The outer peripheral part which consists of a 1st curve part in a connection part with the 1st flange part,
A central portion of the second flange portion having an outer periphery made up of a second curved portion;
The cooking device according to any one of claims 1 to 3, wherein a radius of curvature of the first curved portion is equal to or less than a radius of curvature of the second curved portion. Each of the plurality of second flange portions has an outer periphery composed of a third curved portion between the first curved portion and the second curved portion,
The cooking device according to claim 4, wherein a radius of curvature of the third curved portion is equal to or larger than a radius of curvature of the first curved portion and is equal to or smaller than a radius of curvature of the second curved portion. The radius of curvature of the first curved portion is in the range of 20 mm to 25 mm;
The radius of curvature of the second curved portion is in the range of 60 mm to 65 mm;
The cooking device according to claim 5, wherein a radius of curvature of the third curved portion is in a range of 25 mm to 30 mm. The lid packing is
A first seal member extending horizontally with respect to the first flange portion and abutting against the first flange portion;
The cooking device according to any one of claims 1 to 6, further comprising: a second sealing member that extends perpendicularly to the first sealing member and is deformed so as to contact an inner wall of the cooking pan. The cooking device according to claim 7, wherein a third width of the first seal member in the radial direction is larger than the first width of the first flange portion. Provided in the inner lid, and a steam outlet for communicating the inside and outside of the cooking pan;
A steam discharge valve which is movably provided with respect to the inner lid and adjusts opening and closing of the steam discharge port;
The cooking device according to any one of claims 1 to 8, further comprising: a driving unit that drives and controls the steam discharge valve.

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