JP2000308575A - Sealing structure for pressure cooker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To form a sealing packing in a single structure and to make smoothly openable and closable a lid without being prevented by the packing in the sealing structure of the inner container of a pressure cooker such as a pressure- type rice cooking jar. SOLUTION: An inner lid packing 22 is provided with a flange edge part 24 in tight contact with the opening flange edge 10 of an inner container 3 at the time of closing a lid main body and an inner peripheral surface seal part 25 opposed to the opening inner peripheral surface 7 of the container 3 across a fine gap (a). When the inner pressure of the container 3 becomes higher than a fixed value, the part 25 is elastically deformed outward to be brought into close contact with the surface 7.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seal structure between a cooker body and a lid in a pressure cooker such as a pressure cooker.

[0002]

2. Description of the Related Art FIGS. 8 and 9 show a pressure cooker as an example of a pressure cooker. This rice cooker jar is provided with an inner container 3 in an open recess 2 (see FIG. 9) of the jar body 1.
And a lid body 4 for closing the open recess 2
Is attached to the jar body 1 so as to be openable and closable, and an inner lid 5 for closing the inner container 3 is attached to the lower surface of the lid body 4.

[0003] An annular inner lid packing 6 attached to the outer peripheral edge of the inner lid 5 is brought into close contact with the inner peripheral surface 7 of the opening of the inner container 3. The hook 8 of the lid main body 4 is engaged with the jar main body 1, and the lid packing 9 attached to the outer peripheral edge of the lower surface of the lid main body 4 is brought into close contact with the opening brim 10 of the inner container 3.
With the inner container 3 sealed by the inner lid packing 6 and the lid packing 9, the pressing device 11
To cook rice under pressure.

[0004] The pressurizing device 11 shown in the figure is constituted by an electromagnetic solenoid 12 and a pressurizing ball 13, and the plunger 14 of the electromagnetic solenoid 12 is moved backward to move the pressurizing ball 13 onto the steam vent hole 15. Thereby, the steam vent hole 15 is closed to pressurize the inside of the inner container 3.

The inner lid 5 is detachably attached to the lower surface of the lid main body 4 as shown in FIG. 8 in order to facilitate maintenance such as cleaning. In this case, the housing projection 16 of the pressurized ball 13 of the inner lid 5 is fitted into the fitting recess 1 of the lid body 4.
7, and a safety valve 18 provided on the inner lid 5 is fitted into another fitting recess 19 of the lid body 4.

[0009] In FIG. 9, reference numeral 20 denotes a steam hole set.

[0007]

As described above, in a pressure cooker such as a pressure cooker, in order to maintain a required pressure, the inner lid packing is in close contact with the inner peripheral surface 7 of the opening of the inner container 3. However, when the cover is opened and closed due to the presence of the inner lid packing 6, the inner lid packing 6 comes into sliding contact with the inner peripheral surface of the inner container 3 so that the lid is difficult to open and close.

In order to solve this problem, it is necessary to weaken the adhesion of the inner lid packing 6 to the inner container 3,
Then, in the case of a low pressure setting, the inner lid packing 6 cannot be brought into close contact with the pressure at that pressure, so that the sealing force is insufficient, and a desired pressure cannot be obtained. In order to make up for this insufficient sealing force, the above-mentioned lid packing 9 is provided in addition to the inner lid packing 6.

However, the provision of the two packings 6 and 9 has a problem that the product cost is increased, and the attachment / detachment gripping piece is provided on the outer peripheral edge of the inner lid 5 due to the presence of the lid packing 9. There were also inconveniences, such as the inability to attach, and the difficulty in attaching and detaching the inner lid 5.

Therefore, the present invention integrates the functions of the above-mentioned packings into one packing so that the seal between the cooker main body and the lid can be reliably performed even under pressure. It is an object of the present invention to be able to provide the gripping piece without any trouble.

[0011]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a cooking device in which an inner container is accommodated in an open recess of a cooking device main body and a bottom surface of a lid main body which closes the above-mentioned opening recess. Attach the inner lid for closing the inner container, tightly seal the annular inner lid packing attached to the outer peripheral edge of the inner lid to the opening peripheral edge of the inner container, and press the pressure device provided on the lid main body. In the seal structure of a pressure cooker that is operated to perform pressure cooking, the inner lid packing includes a flange edge seal portion that is in close contact with an opening flange edge of the inner container when the lid body is closed, An inner peripheral surface sealing portion opposed to the inner peripheral surface of the container with a small gap therebetween so that the inner peripheral surface sealing portion is elastically deformed outward when pressurized so that the inner peripheral surface sealing portion closely adheres to the opening inner peripheral surface. It was made.

A configuration in which the inner lid packing is provided with a mounting portion that is mounted on the outer peripheral edge of the inner lid, and the mounting portion is provided with the flange edge seal portion and the inner peripheral surface seal portion;
The inner lid packing is provided with a mounting portion that is mounted on the outer peripheral edge of the inner lid, the mounting portion is provided with the flange edge seal portion, the flange edge seal portion is folded back, and the folded back bent portion is continuous with the above. The inner peripheral surface seal portion may be provided. Further, a configuration in which the inner peripheral surface sealing portion is provided through the bent portion at the bent portion.

The above-mentioned inner lid may be detachably attached to the above-mentioned lid main body, and a configuration may be adopted in which a gripping piece for detachment is provided on the outer peripheral edge of the above-mentioned inner lid.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to a pressure cooker. As shown in FIGS. 1 and 2, this rice cooker has basically the same structure as that shown in FIGS. 8 and 9 described above. For this reason, the same portions will be denoted by the same reference numerals, overlapping description will be omitted, and the description will be given mainly of the seal structure which is a different portion.

In this case, there is no equivalent to the lid packing 9 described above, and an inner lid packing 22 having a single structure is mounted on the outer peripheral edge of the inner lid 5. Details of the inner lid packing 22 are as shown in FIGS. That is, the cross-sectional shape of the inner lid packing 22 is such that the laterally opened lateral U
The lower end of the letter-shaped mounting portion 23 is divided into two directions, one of which extends outward to form a brim seal portion 24 and the other extends downward to form an inner peripheral surface seal portion 25.

An upper projection 26 is provided at the upper end of the mounting portion 23, and the flange edge seal portion 24 is provided.
Is provided with a chevron-shaped bent portion 27 at a portion extending outward. Further, the brim seal portion 24 is provided with a U-shaped folded portion 28, and a portion from the folded portion 28 to the tip portion becomes a seal lip portion 29.

The outer peripheral edge 31 of the inner lid 5 is folded back into a horizontal U-shape on the lower surface side, and the folded portion is provided with the inner lid packing 22.
The fitting portion 23 is fitted from the inside, and the protruding portion 26 is bent at the back of the folded portion, and the bent state stabilizes the mounting state of the inner lid packing 22. With the inner lid packing 22 attached as described above, the chevron bent portion 27 of the brim edge seal portion 24 abuts on the outer peripheral surface of the outer peripheral edge 31 of the inner lid 5 to prevent the brim edge seal portion 24 from rising.

The lower end of the inner peripheral surface seal portion 25 is a seal lip portion 32 which is bent slightly inward, so that it can be easily inserted into the inner container 3 and when the pressurization is performed. The elastic deformation to the outside can be easily performed.

In the state where the inner lid 5 is closed, as shown in FIG. 3B, the folded portion 28 of the flange edge seal portion 24 is compressed, and the seal lip portion 29 is attached to the opening flange edge 10 of the inner container 3. The inner container 3 is tightly sealed. On the other hand, the inner peripheral surface sealing portion 25 is opposed to the opening inner peripheral surface 7 of the inner container 3 with a small gap a and does not contact. The minute gap a refers to a gap that does not substantially contact, or even slightly contacts, if any, but in any case, no substantial sealing force is generated.

However, when the internal pressure of the inner container 3 rises, the inner peripheral surface sealing portion 25 is elastically deformed outward by receiving the pressure, and the seal lip portion 32 is brought into close contact with the opening inner peripheral surface 7 so as to be closed. 3 (see the two-dot chain line in FIG. 3B).

As described above, since the brim sealing portion 24 is always in contact with the opening brim 10 irrespective of the pressure in the inner container 3, the inner circumferential surface sealing portion 25 does not exert a sealing force. , The pressure cooking is performed only by the sealing force of the brim edge sealing portion 24. However, in the case of a set pressure higher than a certain level, the seal may be broken in a sealing mode in which the flange 10 is in contact with the opening brim 10 like the brim seal 24. It is elastically deformed and brought into close contact with the inner peripheral surface 7 of the opening to exert a required sealing force.

The inner lid packing 22 of another embodiment shown in FIGS. 4 (a) and 4 (b) has a mounting portion 2 similar to that described above.
3. It has a protruding portion 26 at the upper end thereof and a flange edge seal portion 24 extending outward from the mounting portion 23 thereof. The difference from the foregoing is that the inner peripheral surface seal portion 25 is coupled to the tip of the seal lip portion 29 of the flange edge seal portion 24 via a curved portion 33.

The curved portion 33 extends along the curved portion 34 between the opening flange 10 of the inner container 3 and the inner peripheral surface 7 of the inner container 3 and between the curved portion 34 and the inner surface of the curved portion 34. The inner peripheral surface sealing portion 25 is formed continuously at the lower end of the curved portion 33. In this case, a seal lip 32 is also formed at the lower end of the inner peripheral surface seal 25.

The manner of attachment to the inner lid 5 is the same as that described above. The brim edge seal portion 24 comes into close contact with the opening brim edge 10 to exert a sealing force. There is a minute gap a between the opening inner peripheral surface 7 and no sealing force is exhibited. When the pressure becomes higher than a certain level, the inner peripheral surface sealing portion 25 comes into close contact with the opening inner peripheral surface 7 and exerts a sealing force (see a two-dot chain line in FIG. 4B).

Further, the inner lid packing 22 is provided with the inner lid 5.
When the curved portion 33 is pressed by the action of the inner pressure and the air in the gap 35 is discharged, vacuum suction is performed, and the sealing force of the inner lid packing 22 to the inner lid 5 is further increased.

In both cases of FIGS. 3 and 4, when opening and closing the lid composed of the lid body 4 and the inner lid 5, the inner peripheral surface sealing portion 25 of the inner lid packing 22 and the inner container 3 are opened. Since the minute gap a exists between the opening inner peripheral surface 7 and the opening inner peripheral surface 7, the opening and closing can be performed lightly. In the case of low pressure setting, the flange seal portion 24 is used. In the case of high pressure setting, the inner peripheral surface seal portion 2 is used.
5, and can perform desired pressure cooking.

As is clear from FIG.
Is the inner lid packing 22 only,
Since packing is not attached to the lid body 4 side,
A pair of gripping pieces 30 can be provided on the outer peripheral edge of the inner lid 5, and when the inner lid 5 is attached to the lid main body 4, the fitting recesses 30 a, 30 a of the inner lid mounting portion 40 provided on the lower surface of the lid main body 4.
The holding piece 30 is fitted into the holding member.

When pressure cooking is performed using a pressure cooker such as a rice cooker having a pressurizing function as described above, the discharge of steam in the inner container 3 is restricted, and impurities mixed in the steam are used. And odorous components are not discharged outside and may remain in the rice. In order to prevent this, a deodorant case 44 (see FIG. 2) may be attached to a portion where the steam contacts, for example, the lower surface of the inner lid 5. Activated carbon or the like can be used as a deodorant.

In the pressure cooker such as a rice cooker having a pressurizing function as described above, a lock function is provided on the hook 8 of the cover body 4 so that the cover is not accidentally opened during pressurization. Adding is generally done. In the above embodiment, the plunger 1 of the electromagnetic solenoid 12 is used.
4 is connected to the rear end of the lock member 36 (see FIGS. 5 and 7), and the plunger 1 is actuated by the operation of the electromagnetic solenoid 12.
When the slider 4 is retracted into the electromagnetic solenoid 12, the front end 37 of the lock member 36 is moved forward and below the operating piece 38 of the hook 8 in conjunction with this to lock.

Thus, even if the user presses the hook button 39, the hook 8 does not operate, so that the lid is not opened. When the pressure cooking is completed, the plunger 14 projects rearward, and in conjunction with this, the lock member 36 returns to the original state and the lock is released.

However, if the lock is not released for some reason, the lid remains closed,
Moreover, since it is practically impossible to remove the lid main body 4 from the jar main body 1, it is extremely troublesome.

In order to cope with such a situation, a hole 41 for repair is provided in advance in a portion of the lid body 4 (the hook button 39 in the embodiment) where the front end portion 37 of the lock member 36 faces, and Is concealed by pasting a seal piece 42. Then, when the above situation occurs, the seal piece 42 is peeled off, and a flathead screwdriver 4 is inserted through the hole.
3, the front end 37 of the lock member 36 is forcibly elastically deformed rearward (see the two-dot chain line in FIG. 7).
Evacuate from below 8 As a result, the lock of the hook 8 is forcibly released, and the lid can be opened.

[0033]

As described above, according to the present invention, in a pressure cooker such as a pressure rice cooker, the inner lid packing for sealing the inner container is formed by a single member. The number can be reduced. Also,
The inner lid packing is provided with a brim edge seal portion and an inner peripheral surface seal portion, and when the inner peripheral surface seal portion is closed, the inner peripheral surface of the inner container is not brought into contact with the inner peripheral surface of the inner container when a predetermined pressure or more is applied. Since the contact is made by elastic deformation, opening and closing of the lid can be performed lightly, and reliable sealing can be performed in both low pressure setting and high pressure setting.

In addition, since a gripping piece can be provided on the inner lid, attachment and detachment of the inner lid and other handling become easy.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a rice cooker according to an embodiment.

FIG. 2 is a partially omitted sectional view of the above.

FIG. 3A is a sectional view of the inner lid packing according to the embodiment, and FIG.

FIG. 4A is a cross-sectional view of an inner lid packing according to a modified example. FIG.

FIG. 5 is a perspective sectional view of a lid portion of the embodiment.

FIG. 6 is a partial sectional view of the above.

FIG. 7 is a partially omitted plan view of the above.

FIG. 8 is an exploded perspective view of a conventional example.

FIG. 9 is a partially omitted sectional view of the above.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Jar main body 2 Open recess 3 Inner container 4 Lid main body 5 Inner lid 6 Inner lid packing 7 Opening inner peripheral surface 8 Hook 9 Lid packing 10 Open flange 11 Pressing device 12 Electromagnetic solenoid 13 Pressing ball 14 Plunger 15 Steam Drain hole 16 Storage convex part 17 Fitting recess 18 Safety valve 19 Fitting recess 20 Steam hole set 22 Inner lid packing 23 Mounting part 24 Flange edge seal part 25 Inner peripheral surface seal part 26 Projection part 27 Angled bent part 28 Folded bending Part 29 seal lip part 30 gripping piece 30a fitting recess 31 outer peripheral edge 32 seal lip part 33 curving part 34 opening curving part 35 gap 36 locking member 37 front end part 38 operating piece 39 hook button 40 inner lid attaching part 41 hole 42 Seal piece 43 Driver 44 Deodorant case

Claims (5)

[Claims] 1. An inner container is housed in an open recess of a cooker body, and an inner cover for closing the inner container is attached to a lower surface of a cover body for closing the open recess. A seal structure of a pressure cooker in which an annular inner lid packing attached to the periphery is tightly sealed to the periphery of the opening of the inner container, and a pressure device provided on the lid body is operated to perform pressure cooking. In the above, the inner lid packing has a brim edge seal portion which is in close contact with the opening brim edge of the inner container when the lid body is closed, and an inner peripheral surface opposed to the inner peripheral surface of the inner container with a small gap therebetween. A seal structure for a pressure cooker, comprising: a seal portion; and when pressurizing, the inner peripheral surface seal portion is elastically deformed outward so as to be in close contact with the inner peripheral surface of the opening. 2. The method according to claim 1, wherein the inner lid packing is provided with a mounting portion attached to the outer peripheral edge of the inner lid, and the mounting portion is provided with the collar seal portion and the inner peripheral surface seal portion. The seal structure for a pressure cooker according to claim 1. 3. An inner lid packing is provided with a mounting portion attached to the outer peripheral edge of the inner lid, the mounting portion is provided with the flange edge seal portion, and the flange edge seal portion is folded back.
The seal structure for a pressure cooker according to claim 1, wherein the inner peripheral surface seal portion is provided continuously to the folded portion. 4. The seal structure for a pressure cooker according to claim 3, wherein the inner peripheral surface sealing portion is provided at the folded portion via a curved portion. 5. The device according to claim 1, wherein the inner lid is detachably attached to the lid main body, and a detachable grip is provided on an outer peripheral edge of the inner lid. Pressure cooker seal structure.