JPS6156613A - 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 is particularly utilized for safely using the pressure cooker.

Generally, pressure cookers have a locking piece on the side wall of the lid.
It is overlapped with the engagement piece provided on the opening edge of the container and sealed with a gasket placed inside the side wall of the lid, and heated to increase the internal pressure and cook. When the internal pressure exceeds a predetermined value determined by the pressure regulating valve, it is necessary to activate the safety valve to release the pressure9.For this reason, the pressure cooker is provided with a safety valve. The safety valve is equipped with a passageway that releases the internal pressure to the atmosphere, but these passageways 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, an auxiliary means is required to release the internal pressure even if the safety valve does not operate. Since gutskin made of elastic material is easily deformed in response to internal pressure, an internal pressure release safety device is proposed that utilizes this property.

[Prior art and its problems]

・As a safety measure that utilizes the elastic deformation of Cerakin, there is Japanese Utility Model Application No. 51-47466. In the known example, Cerakin made of an elastic material with a cross section of approximately horizontal Uf-W is arranged on the side wall of the lid, and a hole is provided in the side wall of the lid near the bottom of the main body of the i4 lid, so that the internal pressure can be reduced. When the body rises, the lower tongue piece and a part of the main body are elastically deformed, causing the lower tongue piece to protrude from the hole, and by communicating the inside of the container with the atmosphere through the hole, the pressure is reduced.

With this method, since the lower tongue piece is largely deformed in the opposite direction, the deterioration of the lower tongue piece is rapid.Also, since internal pressure is applied to the relatively small lower tongue piece to cause it to elastically deform, the set internal pressure can be adjusted. It is difficult to do so, and there are many problems such as no decompression phenomenon occurring despite the high pressure.

[Technical problem of the present invention and its means]

The technical problem of the present invention is to solve the above-mentioned problems of the prior art.Basically, when the internal pressure exceeds a predetermined value, a part of the lower tongue of the gasket becomes attached to the container. A technical means is used to create a deformed protrusion in the gap between the notch between the pieces and the side wall of the lid, thereby communicating the inside of the container with the outside.

[Embodiment] (1) A hole provided in the side wall between the locking pieces of the lid is made to face the main body of the gasket, so that a part of the gasket can be moved laterally in a large circle.

According to this embodiment, when the internal pressure increases and exceeds a predetermined value (more than the set value of the safety valve), the packing body moves radially outward, and then a part of the packing protrudes from the hole to the outside. Also, the lower tongue piece moves into the gap between the locking pieces of the container and releases the internal pressure downward from this part. By releasing the pressure downward, the danger of fire to the user is reduced.

(2) A diagonal notch is provided in the lower part of the main body of the gasket that faces the claw of the locking member. This notch eliminates contact between the claw piece and the gutskin, making the reciprocating movement of the claw piece easier.

(3) The tip of the upper tongue of Nototsukin is on the inner wall of the lid,
- The tip of the lower tongue of the armpit skin touches the inner wall surface of the container, and the almost vertical outer circumferential surface of the packing body touches the side wall of the lid. This improves the airtightness of the cover and prevents the cover from being accidentally bent or rotated.

〔Example〕

As shown in FIGS. 1 and 2, the pressure cooker 1 basically includes a lid 3 having an upper handle and a container 5 having a lower handle 4. As shown in FIGS. Reference numeral 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 upper opening, and has a plurality of spaced engagement pieces γ 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 engagement piece 7 becomes smaller than the dimension between the other engagement pieces 1. Further, an inward protruding surface 8 is formed on one side edge of the engaging piece 7 to support the /4' lock and restrict the rotation of the container and the lid, which will be described later.

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 1 is smaller in one place, but the width of the locking piece 10' corresponding to the smaller size of the engaging piece 7' is wider than that of the remaining locking piece 10. becomes small. Therefore, the dimension between one side of the locking piece 10' having a small width and the adjacent locking piece 10 is larger than other parts. As a result, the wide engagement piece 7' engages only in the large portion between the locking pieces 10 and 10', and the positioning of the flap 7c3 with respect to the container 5 can always be kept constant.

As shown in FIG. 2, when the lid 3 is rotated with respect to the container 5 after the engaging piece γ and the locking piece 10 are in a fitting relationship, the engaging piece 7 and the locking piece 10 overlap each other. This allows the lid 3 to be fixed to the container 5. The rotation limit of the lid 3 can be restricted by bringing the portion 8 projecting radially from the side wall of the lid 3 into contact with one side edge of the engaging pieces 7, 7' of the container 5.

As shown in FIG.
Place 1. /4' The lid 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, so that the lid 3 and the container 5 are fixed. When in this relationship, the upper tongue piece 13 contacts the inner wall surface of the lid 3, and the lower tongue piece 14 contacts the inner wall surface of the container body 5. The body part 1.2 abuts the inner surface of the side wall 9 of the lid 3. In order to secure the position of the gasket 11 as shown in FIG. 1, the protruding surface 37 provided on the engagement piece 7 works effectively. Moreover, this protruding surface 3γ is
When the lid 3 and the container 5 are rotated relative to each other, the lower part of the bottom cover 11 is prevented from being deformed by the engagement piece 7.

The Nototsukin 11 is shown in Figures 4-6. A thin wall portion 38 in the form of a recess is formed in the inner wall of the lower tongue piece 14 of the paddle 11 at a proper location, and the lower tongue piece 14 provided with this thin wall portion 38
A C recess 39 is formed on the outer periphery of the main body portion 12 corresponding to the 0 portion. This concave 1.1° deformation is facilitated. The four-piece skin 11 further has a notch 4 diagonally inserted into the lower part of the main body 12 at an appropriate position.
Set 0. This notch 40 serves to avoid contact or abutment between the claw piece 24 and the gasket 11, which will be described later.

As is clear from FIG. 4, the recess 39 of the packing is...
Remove the gasket 11 in the radial direction from the outer circumferential surface of the gasket 11.
Position t-specific with respect to the lid 3! let

Furthermore, at least one horizontally long hole 15 can be bored in the side wall 9 of the fc3 at a suitable location between the locking pieces 10. This hole 15 faces the main body 12 of the four-piece housing 11, and when the internal pressure of the container 5 abnormally increases, the four-piece housing 11 is inserted into this hole 15.
5 with internal pressure, and the lower tongue piece 14 is inserted into the engagement piece 1 of the container 5.
It separates from the gap and creates a harama, which acts to relieve internal pressure.

A lock valve 16 is provided by utilizing the upper handle 2 of the foot & 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 17.

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 horizontal locking member 21 that can be slid laterally along the upper surface of the valve body 17 is provided. A hole 22 is bored in the horizontal part of the locking member 21, and the valve stem 18 is allowed to rise only when the valve stem 18 faces this hole 22. A spring 23, one end of which abuts against the wall of the upper handle 2, is locked to the vertical part of the locking member 21. A claw piece 24 facing radially inward (C) is fixed to the lower part of the vertical part of the locking member 21.

The claw piece 24 normally projects into the interior of the lid 3 through a hole 25 formed in the side wall 9 of the lid 3, and the hole 22 in the horizontal portion 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.
Since it comes into contact with the class a of the engagement piece 7 of the container 5, the locking member 2
1 means 1, @ 1 The prisoner is forced out to the right. After that, when the lid 3 is rotated relative to the container 5 and the engagement piece γ and the locking piece 10 are overlapped, the claw piece 24 is located between the engagement pieces 1, so that it is in contact with the engagement piece T. The contact is released and the lock member 2
1 assumes the position shown in FIG. 1 under the force of spring 230.

In the 7-state shown in FIG. 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.
When the internal pressure rises due to heating, the internal pressure acting on the pressure-receiving surface at the bottom of the valve stem pushes up the valve stem 18 against its own weight, causing the horizontal hole 19 to enter the valve body 17 and cause internal damage. and cut off communication with the atmosphere. Further, the upper part of the valve stem 1B is connected to a locking member 2.
1 into the hole 22 in the horizontal part. As a result, the lid 3 is rotated relative to the container 5, and the claw piece 24 is brought into contact with the side edge of the engaging piece 7, and the overlapping engagement between the engaging piece 7 and the locking piece 10 is released. Even if an attempt is made to achieve the state shown in FIG. 2, the valve stem 18 enters the hole 22 in the horizontal part of the locking member 21, preventing the locking member 21 from moving to the right as viewed in FIG. Piece 2
4 and the engagement 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 to push up the valve stem 18, the lid 3 cannot be removed. This prevents the lid 3 from being opened carelessly and the smoked substance inside blown out even though the residual pressure is relatively high.

Only when the internal pressure decreases, the bottom of the valve stem 18 communicates with the atmosphere through the holes 19 and 20, and the upper part of the valve stem 18 comes out of the hole 22 in the horizontal part of the locking member 21. The lid 3 can be rotated relative to the container 5.

A large valve 26 is provided in the center of the lid 3. Mainly, the nozzle body 26 has a vertical hole 27 in the center and a horizontal hole 28 in the lower part, and is fixed to the lid 3 using a nut 30. The opening is arranged with a main body 31 that is normally closed.

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 and communicates the atmosphere with the inside of the container 5. to release the internal pressure and maintain the internal pressure at a predetermined value. That is,
The main 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 are restricted to internal pressure and have 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
Even if this does not work, 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, as described above.

Opposite the hole 15 made in the side wall 9 of the lid 3, insert the gasket 1.
1 recess 39 is arranged. That is, the actual image 41 of the packing 11 is placed in the hole 15, its side surfaces are opposed to the left and right sides of the hole 11, and the position of the packing 11 with respect to the lid 3 is specified.

The thin part 38 of the lower tongue piece 14 of the packing 11 is located in the recess 3 of the
It is located on the same radius line as 9. 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 formed to be longer than the lower tongue piece 14, so that 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 14 is longer than the lower tongue piece 14. The piece 13 is brought into contact with the lid 3.

(The notch 40 of the lock 11 is connected to the claw 24 of the lock valve 16.
When reciprocating, avoid contact between the claw 24 and the gutskin 11. This facilitates operation of the lock valve 16.

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 24-piece skin 11 that has received this abnormally high pressure is pressed radially outward. Therefore, the main body portion 12 of the gasket 11 at the hole 150 formed in the side wall 9 of the lid 3 protrudes from the hole 15 to the outside. Further, the upper tongue piece 13 moves laterally while remaining in contact with the lid 3, and a part of the lower tongue piece 14 eventually loses contact with the container 5 as shown in FIG. 7
Create a gap away from the gap, create a passageway to release abnormally high internal pressure, and reduce the pressure. Thus, the pressure cooker can be safely used at home. This pressure relief is Patsukin 110
The recess 39 in the body 12 is created by lateral movement with elastic deformation into the hole 15 of the body 120 . or,
The thin part 38 of the lower tongue piece 14 first creates a small communication part with the outside while elastically deforming to the notch between the engaging pieces 7 of the container 5 of the lower tongue piece 14, and prevents sudden pressure release. It works to prevent abnormal pressure from occurring. This state is shown in FIG. When an internal pressure exceeding the level of the safety valve 320 is generated, the thin part 38 of the lower tongue piece 12 first deforms elastically and
A small passage 42 with the outside is created to release internal pressure. However, if the pressure generated within the container exceeds this internal pressure relief and the abnormally high pressure is maintained, the thin wall portion 38 of the lower tongue piece 12 will further elastically deform in the lateral direction, causing the communication portion 42 to become larger. It opens, allowing a large amount of internal pressure to escape and preventing abnormal internal high pressure from occurring.

〔effect〕

The recess in the seal body ensures the horizontal movement of the lid side wall in the opposite direction when the seal receives high internal pressure that exceeds the limits of the safety valve. In addition, as the thin part of the lower tongue piece of the seal moves toward the hole in the nototuki/, it receives internal pressure while moving in the direction of the gap between the engaging pieces of the container. The tip of the piece falls into the gap and relieves the internal pressure.

This pressure relief is not a sudden pressure relief, so the pressure cooker will not fall over. Also, after the internal pressure has decreased, /#7
-1i' 7 ``Original position'' ``The return to the original position'' is reliably accomplished because the protrusion between the lower tongue piece 0 and the engaging piece is small.

Furthermore, the insertion of the actual image of the packkin into the large area of the lid facilitates positioning of the packkin with respect to the lid.

[Brief explanation of the drawing]

FIG. 1 is a new 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, Figure 3 is a partial sectional view showing the moving state of the gasket, Figure 4 is a plan view of the gasket, and Figure 5 is the same as in Figure 4. Arrow view -
6 is a cross-sectional view seen from v, and the arrow Vl-V in FIG. 41 [
7 is a cross-sectional view taken from the direction of the arrow ■--■ in FIG. 3. In the figure = 3...Lid, 5...Container, 7...Engagement piece,
10...locking piece, 11...A? Tsukin, 12...
Main body, 13.14... Tongue piece, 15... Hole, 16.
... Lock valve, 26 ... Main valve, 32 ... Safety valve, 38 ... Thin wall portion, 39 ... Recess, 40 ... Notch, 41 ... Actual drawing. Agent: Hideaki Kuwahara, Patent Attorney (Volunteer) Proceedings: November 15, 1985 Michibe Uga, Commissioner of the Patent Office, 1, Indication of Case Patent Application No. 178147, 1982, 2, “Invention Name Pressure Cooker 3, Relationship with the case of the person making the amendment Patent Applicant Address 3-2-1 Magagane, Shizuoka City, Shizuoka Prefecture Name Riken Light Kinpū Kogyo Co., Ltd. Representative Ryo Ishihara 4, Agent ■105 Address Nishi-Shimbashi Chuo Building 6, 3-15-8 Nishi-Shimbashi, Minato-ku, Tokyo, subject of amendment: Drawing 7, contents of amendment: Figure 3 will be replaced with the attached drawing.

Claims (2)

[Claims] (1) A plurality of spaced engagement pieces provided on the side wall of the lid are attached to a plurality of spaced engagement pieces formed on the periphery of the opening of the container.
A pressure cooker in which the lid and the container are overlapped and arranged inside a side wall of the lid to seal the lid and the container by relative rotation, wherein the packing is an annular main body portion. and upper and lower tongues extending radially inward from the main body, the lower tongue having a shorter length than the upper tongue, and a portion of the lower tongue preventing pressure inside the container. 1. A pressure cooker characterized in that, when the amount of water exceeds a predetermined value, the engaging pieces deform and protrude to communicate between the inside of the container and the outside. (2) The pressure cooker according to item (1), wherein a partially thinned portion is provided on the inner wall surface of the lower tongue piece of the packing.