JPH0678851A - Pressure cooker - Google Patents

Abstract

PURPOSE:To keep the safety of a pressure cooker by surely deforming a part of a packing when the pressure inside the vessel becomes abnormally high and releasing it go outside. CONSTITUTION:A main hole 26 and a subordinate hole are punched on the side wall 24 of a lid 3. Projection sections 17, 17 of the packing are housed in both ends of the main hole 26. When the pressure inside the vessel becomes abnormally high, the main body section 14 of the packing is moved in the main hole 26 and a lower tongue piece 16 is moved inside an engagement piece 4, thereby connecting the inside and outside parts.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is designed to prevent the lid body from being lifted up by internal pressure by stacking engagement pieces provided on a container for containing food and a lid body, and an internal packing by a packing inside the lid body. The present invention relates to a pressure cooker that prevents pressure leakage.

[0002]

2. Description of the Related Art A pressure cooker that heats an internal pressure by heating a container with a lid so that the container is substantially sealed so that the pressure in the container does not rise when the lid and the container are incompletely fitted. The mechanism that prevents the lid from opening when the internal pressure is high is essential for safety.

The latter mechanism is disclosed, for example, in Japanese Examined Patent Publication No. 62-4124.
Basically, the lock pin of the lock valve of the lid rises when the internal pressure becomes high, and the lock pin enters the hole at the tip of the lock bar of the former mechanism, and the internal pressure is high. Since the engagement between the lock pin and the lock bar is maintained,
The lid is not rotatable with respect to the container, that is, the overlapping of the engaging pieces is maintained. Therefore, when the residual pressure after cooking is high, the lid is not opened and the food is not blown out.

The former mechanism, that is, the mechanism for preventing pressurization at the time of incomplete fitting, is pulled outward in the radial direction when it is in contact with the engaging piece of the container as in Japanese Utility Model Publication No. 59-35146, and is placed between the engaging pieces. When it is located, it has a sliding body that is pushed outward in the radial direction and partially opens the packing to the outside air. With this configuration, even if the engagement pieces of the container and the lid are heated in a state where they are not correctly overlapped with each other, the internal pressure leaks to the outside from the portion where the packing is partially opened, and the internal pressure is prevented from rising.

The partial opening of the packing also has an important safety function as an auxiliary means for releasing the internal pressure to the outside when the safety valve does not operate. There is a type in which a function as a safety valve is provided by utilizing elastic deformation of packing without using the sliding body as described above. The known example is disclosed in Japanese Utility Model Publication No. 51-47466. In the known example, a packing made of an elastic material having a substantially U-shaped cross section is arranged on the side wall of the lid, and a hole is formed in the side wall of the lid near the lower part of the main body of the packing, and the inner pressure is lowered. The tongue piece and a part of the body part are elastically deformed, the lower tongue piece is projected from the hole, and the inside of the container is communicated with the atmosphere through the hole to reduce the pressure. This means that the lower tongue is largely deformed in the opposite direction, so that the packing is deteriorated quickly, and the relatively small lower tongue is elastically deformed by applying the internal pressure, so that the packing deformation adjustment of the set internal pressure can be performed. The decompression phenomenon due to packing deformation has a variation setting relationship due to uncertainties in which the plurality of engaging pieces on the peripheral edge of the opening of the container and the engagement of the plurality of locking pieces of the lid are arranged at a plurality of positions. In some cases, there is a problem that the high-pressure decompression phenomenon that does not reduce the pressure does not occur.

In order to solve the above-mentioned problems of the prior art, the present applicant has already filed Japanese Patent Publication No. 61-43046 and
Proposed improvement proposed in 63-9843,
The present invention is an extension of these techniques.

[0007]

SUMMARY OF THE INVENTION The present invention is to solve the above-mentioned problems of the prior art and to solve the further improvement of the above-mentioned technology proposed by the present applicant.

[0008]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention is basically arranged such that the side wall of the lid has a main hole and an accessory hole integrally with the main hole, and the main body of the packing is A means is used that allows the lower tongue to move into the main hole and into the accessory hole.

Specifically, according to the present invention, a plurality of spaced engagement pieces formed on a peripheral edge of an opening of a container are provided with a plurality of spaced engagement pieces provided on a side wall of the lid body. In a pressure cooker that overlaps by relative rotation with the container, and arranges packing inside the side wall of the lid to seal the lid and the container, the packing has an annular main body, And upper and lower tongues extending inward in the radial direction from the main body,
There is a hole at least at one place on the side wall between the engaging pieces of the lid body, and the hole is composed of a main hole that is elongated in the circumferential direction and an auxiliary hole that communicates with the main hole. Provided is a pressure cooker in which the body parts of the packing are opposed to each other.

[0010]

When the pressure inside the container becomes abnormally high (including when the safety valve does not operate), the inner peripheral surface of the packing receives high pressure and is pressed against the side wall of the lid. At this time, a part of the main body of the packing moves into the main hole, and the base of the lower tongue piece or the upper tongue piece enters the accessory hole, and the tip of the lower tongue piece or the upper tongue piece is engaged with the container. It moves to one side to open the body to the outside and lower the internal pressure.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A pressure cooker 1 has a container 2 for containing ingredients to be cooked and a lid 3 for closing an opening of the container 2 and not leaking internal pressure to the outside. As shown in FIG. 2, a plurality of engaging pieces 4 extending outward in the radial direction are provided at the opening edge of the container 2 at a distance from each other. Similarly, a plurality of spaced engagement pieces 5 are provided on the outer peripheral edge of the lid body 3.
To provide. When the lid 3 is placed on the opening of the container 2, the engagement piece 5 of the lid 3 is located between the engagement pieces 4 of the container 2 as shown in FIG.
When the lid body 3 is turned, the engagement piece 5 of the lid body 3 becomes the engagement piece 4 of the container 2.
It moves to the lower side and becomes a state of overlapping. The packing 6 is arranged on the inner peripheral side of the lid 3. The packing 6 makes it possible to increase the internal pressure by heating. That is, the packing 6 functions to prevent the internal pressure from leaking to the outside.

Handles 7 and 7'are attached to the left and right of the container 2,
Handles 8 and 8'are also attached to the lid 3. At the time of use, both handles 7 and 8 are in a relationship of vertically overlapping. A known safety valve 9 is provided on the lid 3. If the internal pressure of the safety valve 9 exceeds the design value,
It works to release internal pressure to the outside. A known weight valve 10 is arranged in the center of the lid 3. When the internal pressure of the weight valve 10 rises more than necessary, the weight floats and leaks only unnecessary pressure to the outside to keep the internal pressure constant. The lock valve 11 is arranged on the handle 8 of the lid 3. As shown in FIGS. 3 and 4, the lock valve 11 has a valve body, that is, a lock pin and a display pin 13, and when the lock pin 12 is raised by receiving an internal pressure, the display pin 13 is also raised, and the tip thereof is a handle 8. It is more prominent and informs the user that the internal pressure is high.

A slide body 21 is arranged in the handle 8. Sliding body 21
Has a main body 23 that receives the biasing force of the spring 22, and a lock bar 25 that is fixed to the main body 23 and whose tip extends to the lock pin 12. Since the tip of the main body 23 is located between the side edge of the engagement piece 4 of the container 2 and the engagement piece 4, it is movable inward and outward in the radial direction, and when both engagement pieces 4 and 5 overlap each other as shown in FIG. The tip of the main body 23 is located between the engaging pieces 4, and the hole at the tip of the lock bar 25 faces the lock pin 12. When the internal pressure becomes high, the lock pin 12 becomes the lock bar 2
It enters the hole at the tip of 5 and blocks the rotation of the lid 3. Therefore, the lid 3 cannot be rotated in a state where the residual pressure after cooking is high. Reference numeral 16 is a cough for preventing the broth from sticking to the display pin 13.

3 and 4 show cross sections of an example of the packing 6. The packing 6 has a main body portion 14 and upper and lower tongue pieces 15 and 16 extending inwardly and vertically from the upper and lower inner peripheral surfaces thereof. On a part of the outer peripheral surface of the main body portion 14, there are provided trapezoidal protrusions 17, 17 which incline the opposed inner sides of a pair of positioning and arranged with respect to a main hole described later. The trapezoidal protrusion 17 is hard to be deformed, and the engagement is set. Main body 14 between the protrusions 17, 17
Thin portions 18, 19, 20 are provided on the outer peripheral surface and the inner peripheral surfaces of the upper and lower tongue pieces 15, 16 corresponding to this portion. This thin part 1
Reference numerals 8 and 19 finely and stably reduce the pressure reduction phenomenon of the set internal pressure.

A hole is formed in the side wall 24 of the lid 3. The hole is a main hole 26 which is thin in the circumferential direction and accommodates the protrusions 17 at both ends thereof,
The auxiliary hole 27 is formed in a downward arc shape from the lower side of the main hole 26. The accessory hole can be arranged on the upper side. When the packing is normally attached, the protrusion 17 is located in the main hole 26.
1, the upper tongue piece 15 contacts the inner surface of the lid body 3, and the lower tongue piece 16 contacts the inner surface of the opening edge of the container 2 as shown in FIG.
When the internal pressure of the container becomes abnormally high, the upper and lower tongue pieces 15 and 16 are brought into close contact with the lid 3 and the inner surface of the container 2 by the high pressure acting on the inner peripheral surface side of the packing 6. The thin-walled portions 19 and 20 are set at the center of the accessory hole, and the thin-walled portions 19 and 20 are set to have a small width, that is, they are arranged at the center of the accessory hole 27. Due to the high pressure, the main body portion 14 moves while deforming outward in the radial direction, but this movement causes the lower tongue piece 16 and the thin wall portion 20 to move with the upper tongue piece 15 in close contact with the inner surface of the lid body 3. While maintaining a constant reduced pressure, the guide is made in the direction of the accessory hole 27, and due to the small width setting of the thin portion 20, the reduced pressure set by each minute depressurization becomes small. As shown in FIG. 6, 16 is deformed and moved between the engaging pieces 4 of the container 2 so that the inside and outside of the container are communicated with each other under a gentle reduced pressure. Thus, the internal pressure is reduced and the cooker is in a safe condition. At this time, since the protrusions 17 and 17 are restricted from moving at both ends of the main hole 26, the upper tongue piece 1
5 does not enter the main hole 26.

[0016]

[Effect] When the pressure inside the container becomes abnormally high, it is possible to set the blowout of the depressurized pressure that allows the internal pressure to escape from the gap between the accessory hole, the side wall of the lid and the engaging piece of the container, and to reduce the blowout force. Therefore, the gas fire never goes out.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a pressure cooker according to an example of the present invention.

FIG. 2 is a diagram showing a relationship between engaging pieces of a container and a lid.

FIG. 3 is a vertical sectional view of a packing.

FIG. 4 is a cross section of the packing.

FIG. 5 is a front view showing holes of a lid body.

FIG. 6 is a view showing a modification of packing.

[Explanation of symbols]

 2 Body 3 Lid 4, 5 Engagement Piece 6 Packing 14 Main Body 15, 16 Tongue 17 Protrusion 26 Main Hole 27 Attached Hole

Claims (3)

[Claims] 1. A plurality of spaced engagement pieces formed on a peripheral edge of an opening of a container are provided with a plurality of spaced engagement pieces provided on a side wall of the lid, and a relative rotation between the lid and the container. In a pressure cooker in which the packing and the container are closed by dynamically stacking the packing inside the side wall of the lid, the packing has an annular main body and a radial inner portion from the main body. Upper and lower tongues extending in one direction, and a hole at least at one location on the side wall between the engaging pieces of the lid, the hole being a circumferentially elongated main hole, and this main hole. A pressure cooker comprising an accessory hole leading to the main hole of the packing. 2. The pressure cooker according to claim 1, wherein the upper and lower tongue pieces are provided with thin-walled portions having thin inner peripheral surfaces. 3. When the pressure in the body reaches or exceeds a predetermined value,
A part of the main body of the packing moves into the main hole, and a part of the lower tongue deforms and moves into the accessory hole.
Pressure cooker.