JPS60194911A - Pressure cooker - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a pressure cooker, and a trap is utilized to safely use the pressure cooker.

Generally, pressure cookers have a locking piece on the side wall of the lid.
The container is overlapped with a retaining piece provided on the opening edge of the container and sealed with a gasket placed inside the side wall of the lid, and the internal pressure is increased by heating to cook. When the internal pressure exceeds a predetermined value determined by the pressure regulating valve, it is necessary to activate a safety valve to release the pressure. For this reason, pressure cookers are provided with a safety valve. The safety valve is equipped with a passage that releases the internal pressure to the atmosphere, but these passages become clogged with boiling liquid, dregs, etc., and sometimes the safety valve does not operate and the pressure inside the container becomes abnormally high, creating a dangerous situation.

Therefore, even if the safety valve does not operate, an auxiliary means to release the internal pressure is required.
Since it is easy to deform in response to internal pressure, an internal pressure release safety device is proposed that takes advantage of this characteristic.

[Prior art and its problems]

Japanese Utility Model Application No. 51-47466 discloses a safety measure that utilizes the elastic deformation of the packing. In the known example, a piece made of an elastic material having a substantially horizontal U-shaped cross section is placed on the side wall of the lid, a hole is provided near the bottom of the body of the piece, and when the internal pressure rises, the lower tongue piece is formed. A part of the main body is elastically deformed, the lower tongue protrudes from the hole, and the interior of the container is communicated with the atmosphere through the hole, thereby reducing the pressure.

This method deforms the lower tongue piece in the opposite direction, so...
The tongue deteriorates quickly (Also, since internal pressure is applied to the relatively small lower tongue piece to cause it to elastically deform, it is difficult to adjust the set internal pressure, and there are problems such as no decompression phenomenon despite the high pressure) .

[Technical problem of the present invention and its means]

The technical objective of the present invention is to solve the above-mentioned problems of the prior art, and basically uses a technical means to make the hole bored in the side wall of the lid and the main body of the gasket face each other.

[Actions and effects of the present invention]

When the internal pressure rises and exceeds a predetermined value, the four-piece seal main body moves radially outward, and then a part of the seal protrudes from the hole to the outside, and the lower tongue piece locks the container. Move to the space between the pieces and release the downward 1c internal pressure from this part. This downward pressure release reduces the risk of burns to the user.

A feature of the present invention is the use of means for moving a portion of the main body of the packing in the lateral direction. This method does not put an unreasonable load on the tongue of the gut.
It can extend the lifespan of the plant.

[Embodiment]

(1) The hole in the side wall of the lid is a horizontally long hole, and its height is:
It looks like a dog because of the thickness of the main body of Patsukin. This facilitates the protrusion of the body from the hole.

(2) The tip of the upper tongue of the packing contacts the inner wall surface of the lid, the tip of the lower tongue of the packing contacts the inner wall of the container, and the substantially vertical outer circumferential surface of the packing main body touches the side wall of the lid. This improves the airtightness of the seal and prevents the seal from inadvertently tightening or rotating.

(3) The upper tongue of the seal is longer than the lower tongue. This prevents pressure from being released between the upper tongue and the inner wall surface of the lid when the seal moves laterally.

〔Example〕

As shown in FIG. 1, the pressure cooker 1 basically includes a lid 3 having an upper handle 2 and a container 5 having a lower handle 4. As shown in FIG. Note that 6 indicates an auxiliary handle fixed to the container 5 at a position opposite to the lower handle 4.

The container 5 has a cylindrical shape with a bottom and an upward opening, and has a plurality of spaced engagement pieces 7 extending radially outward at the opening edge. For example, six engaging pieces 7 are formed so that their center portions are equiangular, and one of the engaging pieces 7 is made wider than the remaining engaging pieces. As a result, the dimension between one side of this wide engagement piece 7' and the adjacent securing piece I becomes smaller than the dimension between the other securing pieces 1. Further, an inwardly protruding surface 8 is formed on one side edge of the engaging piece 7 to support the packing described later and to restrict the rotation of the container and the lid.

A locking piece 10 extending radially inward is formed at the opening edge of the side wall 9 of the lid 3 and has a width corresponding to the width between the engaging pieces 1 described above. The locking piece 10 is formed by press working onto the side wall 9 or by casting. The dimension between the engaging pieces 7 is smaller in one place, but the width of the locking piece 10' corresponding to the smaller size of the engaging piece 7' is smaller than the width of the remaining locking pieces 10. becomes. Therefore, the dimension between one side of the locking piece 10' having a small width and the adjacent locking piece 10 is wider than the other parts. As a result, the wide engagement piece 7' engages only in the wide portion between the locking pieces 10 and 10', and the positioning of the lid 3 relative to the container 5 can always be kept constant.

As shown in FIG. 2, after the engaging piece 7 and the locking piece 10 are in a fitted relationship, when the lid 3 is rotated relative to the container 5, the engaging piece 7 and the locking piece 10 overlap each other, The lid 3 can be fixed to the container 5.

A packing 11 is arranged inside the side wall 9 of the lid 3. The gasket 11 has an annular main body 12 having a substantially rectangular cross section, and upper and lower tongue pieces 13 and 14 extending from the inner peripheral side of the main body 12, and the lid 3 and the container 5 are in a fixed relationship. time, upper tongue piece 13
is in contact with the inner wall surface of the lid 3, and the lower tongue piece 14 is in contact with the inner wall surface of the container 5. The main body portion 12 is in contact with the side wall 90 of the lid 3. In order to secure the position of the gasket 11 as shown in FIG. 1, the protruding surface 8 provided on the retaining piece 1 works effectively.

Moreover, this protruding surface is formed when the lid 3 and the container 5 rotate relative to each other.
The seal 11 is lowered and prevented from being deformed by the retaining piece 7.

In addition, in the side wall 9 of the lid 3, a small (at least one) horizontally long hole 15 can be bored at a suitable location between the locking pieces 10.This hole 15 faces the body part 12 of the seal 110, When the internal pressure of the container 5 rises abnormally, the gasket 11 is pushed into this hole 15 by internal pressure, and the lower tongue piece 14 is separated from between the retaining pieces 7 of the container 5 to form a gap, which acts to release the internal pressure.

A lock valve 16 is provided using the upper handle 2 of the lid 3. The lock valve 16 has a hollow valve body 1γ fixed to the lid 3, and a valve rod 18 that can be raised and lowered is disposed in the hollow portion of the valve body 1γ.

The inside of the container 5 can communicate with the atmosphere through a horizontal hole 19 in the lower part of the valve stem 18 and a vertical hole 20 communicating with the horizontal hole 19. A horizontally slidable locking member 21 is provided on the upper surface of the valve body 17 and is slidable laterally. A hole 22 is drilled in the horizontal part of the lock member 21, and the valve stem 18 is allowed to rise only when the valve stem 18 faces this hole (22). Spring 2 that comes into contact with
Lock 3. A claw piece 24 facing radially inward is fixed to the lower part of the vertical part of the locking member 21. The claw piece 24 normally protrudes into the interior of the lid 3 through a hole 25 made in the side wall 9 of the lid 3, and also protrudes into the inside of the lid 3 through the hole 22 in the horizontal part of the locking member 21.
faces the upper surface of the valve stem 18. When the positional relationship between the lid 3 and the container 5 is as shown in FIG. 2, the claw piece 24 comes into contact with the side edge of the engagement piece 7 of the container 5, so the locking member 21 moves to the right in FIG. It's forced. After that, when the lid 3 is rotated relative to the container 5 and the engagement piece T and the locking piece 10 are overlapped,
Since the claw pieces 24 are located between the engagement pieces 7, the contact with the engagement pieces 7 is released, and the locking member 21 assumes the position shown in FIG. 1 by the force of the spring 23. In the state shown in Figure 1,
The inside of the container 5 communicates with the atmosphere through the horizontal hole 19 and vertical hole 20 of the valve stem 18, but when it is heated and the internal pressure increases, the internal pressure acting on the pressure receiving surface at the bottom of the valve stem increases. , the valve stem 18 is pushed up against its own weight, and the horizontal hole 19 is inserted into the valve body 17.
Go inside and cut off communication between the inside and the atmosphere. Further, the upper part of the valve stem 18 enters the hole 22 in the horizontal part of the locking member 21.

As a result, the lid 3 is rotated relative to the container 5, and the claw piece 24
1'Z, A-person 71. while bringing it into contact with the side edge of the engaging piece 7. i f-+L toshi 4111-〆r) tongue frhA=l
Even if an attempt is made to bring the valve into the state shown in Figure 2, the valve stem 18 is in the hole 22 in the horizontal part of the locking member 21, and movement of the locking member 21 to the right as seen in Figure 1 is prevented. Moreover, since the claw piece 24 and the retaining piece 7 are in a locking relationship, the lid 3 cannot be rotated relative to the container 5. That is,
As long as there is internal pressure pushing up the valve stem 1B, the lid 3 cannot be removed. This prevents the lid 3 from being opened carelessly and the boiled food inside spewing out even though the residual pressure is relatively high. When the internal pressure decreases, the valve stem 18 lowers, the inside of the container communicates with the atmosphere through the hole 19.20, and the upper part of the valve stem 1B comes out of the hole 22 in the horizontal part of the locking member 21. The lid 3 can now be rotated.

A weight valve 26 is provided in the center of the lid 3.

The weight 26 has a nozzle body 29 having a vertical hole 2γ in its center and a horizontal hole 28 in its lower part fixed to the lid 3 using a nut 30, and furthermore, the upper opening of the vertical hole 2T of the nozzle body 29 is fixed to the lid 3 using a nut 30. , the structure is such that a closed weight 31 is normally disposed. When the internal pressure of the container 5 exceeds a predetermined value,
The pressure acting on the weight 31 through the horizontal hole 28 and the vertical hole 27 lifts the weight 31, establishes a communication relationship between the atmosphere and the inside of the container 5, releases the internal pressure, and maintains the internal pressure at a predetermined value. let That is, the weight valve 26 performs a pressure regulating function.

The lid 3 further has a safety valve 32. The safety valve 32 is
A hollow valve body 34 is fixed to the lid 3 by a cap nut 33 with a slit, and a plurality of horizontal holes 35 are provided in the valve body 34.
The plug 36 has a configuration in which a plug 36 having a diameter is screwed into the plug 36. The slit and the horizontal hole 35 act as a bulge against the internal pressure, resulting in a large flow path resistance. Therefore, when the internal pressure exceeds a safe value, the pressure is reduced through the slit, hollow section, and horizontal hole 35 to prevent the pressure from rising above a certain value. Temporarily, safety valve 32
However, as mentioned above, it is safe because the gasket 11 moves into the hole 15 in the side wall of the lid due to the internal pressure and releases the internal pressure to the outside.

Hereinafter, 110 examples of gaskets constituting the gist of the present invention will be described in detail. The hole 15 made in the side wall 9 of the lid 3, preferably the gasket 110 facing the front person, has an annular rectangular (cross section) shape, and its almost vertical outer circumferential surface is aligned with the inner circumferential surface of the side wall when attached. , touch. The tip of the upper tongue piece 13 extending radially inward from the main body 12 contacts the inner wall of the lid 3, and the tip of the lower tongue piece 14 extending in the same direction contacts the inner wall of the container 5. Contacts the inner wall surface to ensure airtightness. Upper tongue piece 1
3 is longer than the lower tongue piece 14 (as described later), even if a part of the packing 11 moves laterally and a part of the lower tongue piece 14 separates from the inner wall surface of the container 5, The upper tongue piece 13 is brought into contact with the lid 3.

From the state shown in FIG. 1, the internal pressure increases and the safety valve 32
When an abnormally high pressure that exceeds the limit is generated within the container 5, the gasket 11 that has received this abnormally high pressure is pressed radially outward. Therefore, the body part 12 of the gasket 110 at the hole 15 made in the side wall 9 of the lid 3 protrudes from the person 15 to the outside. Furthermore, the upper tongue piece 13 moves laterally while remaining in contact with the lid 3, and a portion of the lower tongue piece 14 eventually moves to the third
As shown in the figure, make contact with the container 5 (and move it away from the space between the retaining pieces 1 and the like to create a passage to release the internal abnormally high pressure and reduce the pressure. The device can be used safely at home.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a pressure cooker as an example of the present invention, and FIG.
The figure is a view of the cooker seen from below, showing the relationship between the lid and the container, and FIG. 3 is a partial sectional view showing the moving state of the gasket. In the figure: 3... Lid, 5... Container, T... Engaging piece, 10... Locking piece. 11...(Tsukin, 12...Body part, 13.14
...Tongue piece. 15...hole, 16...lock valve, 26...weight valve. 32...Safety valve. Representative Patent Attorney Hideaki Kuwahara

Claims (1)

[Claims] A plurality of spaced apart retaining pieces formed around the opening of the container,
A plurality of spaced apart locking pieces provided on the side wall of the lid are overlapped by relative rotation between the lid and the container, and a packing is arranged inside the side wall of the lid to lock the lid and the container. In the pressure cooker, the gasket has an annular main body and upper and lower tongue pieces extending radially inward from the main body, and the gasket is provided on the side wall between the retaining pieces of the lid. A pressure cooker characterized in that a hole faces the main body of the packing, and a part of the backing can be moved laterally into the hole.