JPS6130576Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Object of the Invention and Field of Application] This invention relates to a pressure cooker, and more particularly, to a pressure cooker that facilitates the reciprocating movement of a locking member.

Generally, in a pressure cooker, a locking piece provided on the side wall of the lid is overlapped with a locking piece provided on the opening edge of the container, and is sealed with a gasket placed inside the side wall of the lid, and the internal pressure is increased by heating. and let it 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.

On the other hand, despite the high pressure inside the container after cooking,
If you open the lid, there is a danger that the food will blow out due to the internal pressure. For this reason, a lock valve is used that indicates when the pressure inside the container has fallen below a predetermined value and the lid can be opened. The lock valve has a valve stem that moves up and down in response to internal pressure, and the vertical movement of the valve stem is regulated by a lock member on the lid side. Furthermore, if the locking piece of the lid and the engaging piece of the container are not sufficiently overlapped, the lock valve will
It works to prevent the valve stem from rising and prevent internal pressure from rising.

The present invention is utilized to improve such a locking member.

[Prior art and its problems]

Regarding the combination of a lock valve fixed to the lid and a lock member, the present applicant has already disclosed a patent application filed in 1983-
It is proposed as No. 208720. The locking member proposed by the present applicant has a claw piece that comes into contact with the engaging piece of the container, and reciprocates the locking member in and out in the radial direction depending on the contact position between the claw piece and the engaging piece, It controls the vertical movement of the valve stem.

Although the pressure cooker proposed by the present applicant can be put to practical use, there is a sense of resistance in rotating the lid relative to the container, and some users feel uncomfortable. , people like this resistance, but there are many people who prefer a small resistance.

[Technical issues and technical means of the present invention]

The technical problem of the present invention is to satisfy the above-mentioned requirements, and in order to solve the problem, a technical means is used in which the claws of the locking member are formed of a low-resistance material.

[Operations and effects of the present invention]

Since the claws that come into contact with the engagement pieces of the container are made of a low-resistance material, the claws can easily slide against the engagement pieces. The claw pieces are molded from, for example, phenolic resin or polyester resin. Molding the claw pieces with such resin allows insert molding of rivet screw receivers, etc. that fix the claw pieces to the locking member, so that the locking parts are not attached to the claw pieces. The fixing work to the member becomes easy. Furthermore, the engaging piece of the container and the claw piece of the locking member are in good contact with each other, so that the container does not get scuffed, the lid can be smoothly rotated, and the durability of the cooker is increased. Moreover, the relative relationship between the lid and the container is always in an optimal state, and there is no longer an uncertain state of engagement between the lid and the container.

〔Example〕

As shown in FIG. 1, the pressure cooker 1 basically comprises 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,
The opening edge has a plurality of spaced engagement pieces 7 extending radially outward. For example, six engaging pieces 7 are formed so that their centers are equiangular, and
The width of one of the engaging pieces is made wider than the remaining engaging pieces. As a result, the dimension between one side of the wide engagement piece 7' and the adjacent engagement piece 7 becomes smaller than the dimension between the other engagement pieces 7. Further, an upwardly projecting 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 7 described above. The locking piece 10 is formed by press working onto the side wall 9 or by casting. Although the dimension between the engaging pieces 7 is smaller in one place, 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 piece 10.
It is smaller than the width dimension of. Therefore, the locking piece 10 adjacent to one side of the locking piece 10' having a small width dimension is
The dimension between the two parts is larger than the other parts. As a result, the wide engagement piece 7' is
The fitting relationship is established only in the large portion between 0' and the positioning of the lid 3 relative to the container 5 can be kept constant at all times.

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 packing 11 has a main body 12 having an annular shape and 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. At this time, 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 5. The main body portion 12 is in contact with 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 8 provided on the engagement piece 7 works effectively. Further, this protruding surface prevents the gasket 11 from being lowered and deformed by the engaging piece 7 when the lid 3 and the container 5 rotate relative to each other.

Further, a locking piece 10 is provided on the side wall 9 of the lid 3.
At least one horizontally long hole 15 can be drilled at a suitable location between them. This hole 15 is located in the main body 1 of the packing 11.
2, when the internal pressure of the container 5 rises abnormally, the gasket 11 is pushed into this hole 15 with internal pressure, and the lower tongue piece 14 is separated from between the engagement pieces 7 of the container 5, etc., to create a gap, and the internal pressure is reduced. It acts as a remover.

A lock valve 16 is installed using the upper handle 2 of the lid 3. The lock valve 16 has a hollow valve body 17 fixed to the lid 3, and a valve stem 18 that can be raised and lowered is disposed in the hollow portion of the valve body 17. Lateral hole 19 at the bottom of the valve stem 18
The interior of the container 5 can communicate with the atmosphere through a vertical hole 20 communicating with the horizontal hole 19. A horizontal L-shaped locking member 21 is provided along the upper surface of the valve body 17 and is slidable laterally. 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 engaged with the vertical portion of the lock member 21. Lock member 2
At the bottom of the vertical part of 1, there is a claw piece 2 facing radially inward.
Fix 4. The claw piece 24 normally projects into the interior of the lid 3 through a hole 25 made 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 the locking member 2 comes into contact with the side edge of the engaging piece 7, the locking member 2
1 is forced to the right in FIG. after that,
When the lid 3 is rotated relative to the container 5 and the engaging piece 7 and the locking piece 10 are overlapped, the claw piece 24 is located between the engaging pieces 7, so that it does not come into contact with the engaging piece 7. is released, and the locking member 21 assumes the position shown in FIG. 1 under the force of the spring 23. In the state shown in Figure 1,
The inside of the container 5 has a horizontal hole 19 and a 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, pushing it sideways. The hole 19 enters the valve body 17 and blocks communication between the inside and the atmosphere. Moreover, the upper part of the valve stem 18 is
It 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 pieces 2
4 in contact with the side edge of the engaging piece 7,
Even if an attempt is made to release the overlap between the locking piece 10 and the locking piece 10 to achieve the state shown in FIG.
It is inserted into the hole 22 in the horizontal part of the lock member 2.
1, movement to the right is prevented and the claw piece 24 and the engaging piece 7 are in a locking relationship.
Rotation of the lid 3 relative to the container 5 becomes impossible. That is, as long as there is internal pressure pushing up the valve stem 18, 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 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 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 27 in the center and a horizontal hole 28 in the lower part fixed to the lid 3 using a nut 30.
A weight 31 is arranged to normally close the upper opening of the vertical hole 27. 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 is reduced.
The weight 31 is lifted to establish communication between the atmosphere and the interior of the container 5, allowing the internal pressure to escape and maintaining the internal pressure at a predetermined value. That is, the weight valve 26 performs a pressure regulating function.

The lid 3 further has a safety valve 32. The safety valve 32 includes a hollow valve body 34 fixed to the lid 3 by a cap nut 33 with a slit, and has a configuration in which a plug 36 having a plurality of horizontal holes 35 is screwed into the valve body 34. . The slit and the horizontal hole 35 act as a restriction 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. Even if the safety valve 32 does not operate, 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.

The claw piece 24 fixed to the locking member 21, which forms the gist of the present invention, is molded from a low-resistance material such as phenolic resin or polyester resin. A rivet 37, a screw receiver, etc. are insert-molded into the claw piece 24 so that the head thereof enters inside the claw piece 24 and a part thereof projects from the claw piece 24. Lock member 21
Fixing of the claw piece 24 to the lock member 21 is accomplished by passing a rivet 37 or the like through a hole made in the locking member 21, applying a plate 38, and crushing the end of the rivet or the like 37. Alternatively, a nut may be tightened on a screw. A bead is placed inward at the connecting part between the horizontal part and the vertical part of the lock member 21 to increase the rigidity of the lock member 21. A flange 39 is provided on the top of the plate 38,
This prevents the spring 23 from moving in the horizontal direction. A flange 40 provided on the lock member 21 contacts the wall of the hole formed in the upper handle 2, and serves as a guide for the reciprocating movement of the lock member 21.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view of a pressure cooker as an example of this invention, Fig. 2 is a view of the cooker seen from below showing the relationship between the lid and the container, and Fig. 3 is a cross-sectional view showing the lock member and the claw piece. It is a diagram. In the figure: 3...lid, 5...container, 7...engaging piece, 10...locking piece, 11...packet, 12...
...Main body, 13, 14...Language piece, 15...Hole, 1
6...Lock valve, 24...Claw piece, 26...Weight valve, 32...Safety valve.

Claims (1)

[Scope of utility model registration request] A plurality of spaced apart engagement pieces formed on the periphery of the opening of the container are overlapped with a plurality of spaced apart locking pieces provided on the side wall of the lid by relative rotation between the lid and the container. In a pressure cooker in which a gasket is disposed inside the side wall of the lid to seal the lid and the container, a locking member receiving a spring force is disposed on the upper handle fixed to the lid, and a low pressure cooker is provided. A claw piece made of a resistor is integrally fixed to the lock member, and the claw piece comes into contact with an engaging piece of the container to enable the lock member to reciprocate in and out in a radial direction, and is fixed to the lid. A pressure cooker characterized in that vertical movement of a valve stem of a lock valve is regulated by the lock member.