JPH0438407B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a pressure cooker that prevents a lid from rotating when internal pressure is high.

(Prior Art) It is known to prevent the lid from rotating when the internal pressure is high to prevent the food from being spewed out when the lid is opened, as shown in Japanese Utility Model Publication No. 4248/1983. In this known example, a sliding body subjected to a biasing force of a spring can be positioned above a valve member of a pressure regulating valve, and the sliding body is moved along a guide groove provided in a lower handle. In this configuration, when the internal pressure is high, the sliding body comes into contact with the valve member, and therefore,
The sliding body becomes immobile within the guide groove, and the lid body is substantially prevented from rotating.

(Problem to be solved by the present invention) The configuration for guiding the sliding body along the guide groove is as follows:
Although it has the advantage of being able to accurately control the movement of the sliding body, if foreign matter enters the guide groove, the movement of the sliding body will be affected by this foreign matter. Therefore, it is necessary to always keep the inside of the groove clean and check for foreign objects.

Some people who love pressure cookers do not like such inspections, and many people prefer pressure cookers that are easy to maintain and inspect.

Therefore, the present invention aims to satisfy these demands.

(Means for Solving the Problems) In order to solve the above-mentioned problems, the present invention provides a plurality of spaced-apart engagement pieces provided on the periphery of the opening of the main container, and a plurality of spaced-apart engagement pieces provided on the side wall of the lid body. In a pressure cooker that is overlapped with the engaging piece of the main container to seal the two, a sliding plate that receives a force of a spring is disposed on the handle fixed to the lid body, and the sliding plate is placed on the engaging piece of the main container. The lock pin of the locking mechanism fixed to the lid body is moved radially outward upon contact with the main body, and the lock pin of the lock mechanism is moved upwardly, and the slide plate is separated from the engaging piece of the main body container and moves inward. The present invention provides a pressure cooker characterized in that upward movement of the lock pin is restricted by the pressure cooker.

(Function) In the present invention, the movement of the slide plate is controlled by contacting the engagement piece of the main container. That is, when brought into contact with the engagement piece, the slide plate moves outward, allowing the lock pin to rise. Furthermore, since the slide plate is opposed to the stopper piece when the lock pin is raised, rotation of the lid body is reliably prevented.

(Example) The assembled state of the pressure cooker 1 is shown in FIG. 1, and as is clear from the figure, the main container 2, the lid 3, the lower handle 4 fixed to the outer peripheral surface of the main container 2, and the lid It basically has an upper handle 5 fixed to 3. The main body container 2 has a substantially cylindrical shape with a bottom, and a plurality of spaced engagement pieces 6 are provided around the opening of the main body container 2 . As is clear from FIG. 2, the opening periphery of the main container 2 has an annular horizontal piece 7 extending radially outward, and the engagement piece 6 is radially outward from this annular horizontal piece 7. Both ends thereof have a slightly arcuate, smooth curved outline, and have side edges of the engagement piece. The illustrated example uses six engaging pieces 6 that are equally spaced and have equal widths.

The lid body 3 has an annular side wall 8 having holes 9 at appropriate positions, and a plurality of locking pieces 10 facing inward in the radial direction are provided at the lower end of the side wall 8 spaced apart from each other. These locking pieces 1
0, the locking piece 10 enters between the locking pieces 6 of the main container 2 and when the lid 3 is rotated relative to the main container 2, the locking piece 10 enters under the locking piece 6 and locks the lid 3 into the main container. It is possible to fix it to 2. Furthermore, a protrusion 70 is provided inward on the side wall 8 to restrict rotation.

A packing 11 is arranged inside the side wall 8 of the lid body 3.
The packing 11 has a main body portion 1 consisting of an annular thick part.
2, and upper and lower tongue pieces 13 and 14 extending upward and downward from the inner peripheral side of the main body part 12. Fourth
In the illustrated example, the main body 12 has a substantially egg-shaped cross section,
It has wall portions such as circular convex portions 15 and 16 above and below. The upper and lower tongues 13 and 14 have substantially similar cross-sections and are expanded in a V-shape, and arcuate bulges 17 and 18 are formed on the upper and lower surfaces of the semicircular portions at their tips. In the example shown in FIG. 5, the bulges 17 and 18 used in the example shown in FIG. 4 are omitted, and the upper and lower tongue pieces 13,
14 has a semicircular tip, and the other parts are the same as the example shown in FIG.

The packing 19 shown in FIG.
It has upper and lower tongue pieces 13, 14 extending radially inward from the center portion on the inner circumferential side. The connecting portion between the main body portion 20 and the upper and lower tongue pieces 13 and 14 is formed by annular upper and lower recesses 21 and 22.
These recesses 21 and 22 improve the elasticity of the upper and lower tongue pieces 13 and 14. In the example shown in FIG. 7, the main body part 23 has a substantially rectangular cross section, triangular protrusions are arranged in an annular or convex shape on the outer periphery, and a plurality of edges 24 are formed on the upper and lower surfaces.
These edges 24 can elastically contact the inner wall surface of the lid 3 and the horizontal piece 7 of the main container 2. or,
In the example shown in FIG. 8, the main body 25 has a substantially rectangular cross section, and a plurality of tapered annular pieces 2 are provided on the upper and lower surfaces.
6, and these pieces 26 resiliently abut against the inner wall surface of the lid 3 and the horizontal piece 7 of the main container 2.
In addition, the upper and lower tongue pieces 13 of the packing shown in Fig. 6-8,
14 is substantially the upper and lower tongue pieces 13 and 14 of the packing shown in FIGS. 4 and 5, and the bulges 17,
It is isomorphic with 18.

As shown in FIG. 1, these gaskets are provided with body parts 12, 20, 23,
The upper tongue piece 13 is placed inside the lid 3 so that the outer peripheral surface of the upper tongue piece 25 is brought into contact with the inner wall surface of the lid 3 and the tip of the upper tongue piece 13 is brought into contact with the inner wall surface of the lid 3. When the lid 3 is seated on the opening edge of the main container 2, the bottom surface of the main body parts 12, 20, 23, and 25 of the packing contacts the upper surface of the horizontal piece 7, and the tip of the lower tongue piece 14 comes into contact with the inside of the main container 2. Touch the wall. The main body and tongue pieces of these gaskets come into contact with the lid and the main container 2 elastically, and the contact area is small, so even if the lid 3 is rotated relative to the container main body 2, the sliding It does not increase dynamic resistance. Furthermore, it facilitates the movement of the packing due to the pressure difference between the inside and outside.

After properly tightening the lid 3 to the container body 2,
When heated, the pressure inside the main container 2 increases. Such pressure increase brings the upper and lower tongue pieces 13, 14 into pressure contact with the inner wall surface of the lid 3 and the horizontal piece 7 of the main container 2, thereby preventing pressure from escaping. Excessive pressurization can cause Patsukin11,19
is brought into pressure contact with the side wall 8 of the lid body 3, and a part of it is inserted into the hole 19.
can be pushed into Such movement of a part of the body parts of the gaskets 11 and 19 moves a part of the lower tongue piece 14 to the outside of the horizontal piece 7, brings the inside and the outside into communication, and transfers the two-part pressure to the outside. to prevent dangers such as explosions due to abnormal rise in internal pressure. Separately, when the pressure inside the main container 2 becomes excessively negative relative to the outside, the atmospheric pressure acting on the lower tongue piece 13 from between the engaging pieces 6 pushes the lower tongue piece 13 up, causing the main body Enter the container and eliminate the abnormal negative pressure inside.

The annular wall portions such as the circular arc portion 15, the edge 24, and the annular piece 26 provided on the upper and lower surfaces of the main body portions 12, 20, 23, and 25, when the gasket is attached to the lid body 3,
The seal or the annular wall that is in line contact with the inner wall surface of the lid body is elastically pushed in the radial direction. Therefore, when the pressure inside the main body container 2 is negative, external atmospheric pressure can be easily introduced.

The lower handle 4 is fixed to the main container 2 using screws, and an upwardly directed stopper piece 27 is provided on the upper surface of the lower handle 4. As shown in FIGS. 1 and 9, the upper handle 5 has a cover portion 28 that covers the top surface of the lid 3.
This cover part 28 has a hole 29 and a substantially rectangular recess 30, and a screw is screwed into the lid body 3 through the recess 30, and the side wall 8 is inserted from the lateral direction of the upper handle 5.
Screw in the screw to fix the upper handle 5 to the lid body 3.

The upper handle 5 has a main part 31 facing downward, and a stepped groove 32 extending from the cover part 28 to the main part 31.
will be established. The groove 32 is formed between a pair of ribs 33 and 34 provided on the lower surface of the cover part 28, and a part provided in the main part 31 and facing inward. A slide plate 35 is arranged in this groove 32. The slide plate 35 is the tenth
As shown in the figure, an L-shaped lock plate 36,
It consists of a claw 37 fixed to the downwardly facing piece of the lock plate 36 by a rivet. The claw 37 has a stepped semicircular sliding surface 38. A semicircular notch 39 is provided in the protruding portion of the lock plate 36. This slide plate 35 is shown in FIG.
As shown in FIG. 6, it is slidably disposed within the groove 32.

A nut plate 40 is arranged between the lid 3 and the slide plate 35. This nut plate 40 functions as a nut for fixing the valve body 42 of the lock mechanism 41 to the lid body 3. There is a lock pin 4 inside the valve body 42.
Place 3. The lower part of the lock pin 43 receives pressure inside the main container 2, and when the pin 43 receives pressure, it rises, but the upper part of the pin 43 passes over the horizontal piece of the slide plate 36 and enters the hole 44 of the upper handle 5. Although such a locking mechanism 41 is known, in this example, the gasket 45 disposed between the lower part of the locking pin 43 and the valve body 42 is new.

The gasket 45 made of silicone rubber
As shown in Figure 7-22, a depression is provided on the outer peripheral surface. In the example shown in FIG. 17, a triangular cut 46 is made on the outer circumferential surface to form a lip 47 that expands in the vertical direction. The example shown in FIG. 18 has a semicircular notch 46 and a lip 47 extending in the vertical direction. In the example shown in FIG. 19, the outer circumferential surface is a large arcuate surface, and lips 47 are formed above and below it. In the example shown in FIG. 20, a semicircular cut 46 is made on the outer circumferential surface, and lips 4 with a semicircular cross section are formed above and below the cut.
7 is provided. Gasket 45 shown in FIG.
This is similar to the example shown in FIG. 17, but the inner peripheral surface is formed into a circular arc portion 48. In the example shown in FIG. 22, the cuts 46 are formed to form an upward lip 47 and a sideways lip 47.

The gasket 45 can impart a large elastic force to the upper and lower lips 47 through the notches 46. Therefore, when the lock pin 43 is raised and the gasket 45 is seated on the valve body 42, the sealing performance is improved, and furthermore, the lock pin 43 is assisted in separating from the valve body 42, and the gasket 45 is attached to the valve body 42. Eliminate stickiness. That is, the contact of the gasket 45 with the lock pin 43 and the valve body 42 is made in a form close to a line contact with elastic force, and therefore the gasket 45
This prevents the lock pin 43 from puking and makes it easy to separate the lock pin 43 from the valve body 42.

The movement of the slide plate 32 will be explained with reference to FIGS. 11-16. Arranging the lock plate 36 of the slide plate 32 between the nut plate 40 and the upper handle 5, and inserting the claw 37 into the hole in the side wall 8 of the lid body 3,
The spring 49 pushes the slide plate 32 radially inward. The center of the notch 39 of the lock plate 36 is placed on the center line of the lock pin 43.

11-12 shows a state in which the lid 3 is placed on the opening edge of the main container 2 so that the locking pieces 10 of the lid 3 are arranged between the engaging pieces 6 of the main container 2. In this state, the lock pin 43 is lowered, and the large diameter portion of the pin 43 faces the lower surface around the notch 39 of the lock plate 36. The claw 37 is inserted through the hole in the side wall 8.
The gasket 11 is pressed inward, and the lower part of the sliding surface 38 comes into sliding contact with the side edge of the horizontal piece 7 at the periphery of the opening of the main container 2. For example, even if the lid body 3 shown in FIGS. 11-12 is simply placed on the main container 2 and a fire is turned on,
Since the lock pin 43 cannot be raised by the lock plate 36 and the lower tongue piece 14 of the packing 11 is separated from the main container 2, the internal pressure escapes to the outside and the internal pressure is not increased. It cannot be used as a cooking device.

From the state shown in Figures 11-12, remove the lid 3 from the main container 2.
When the locking piece 10 is rotated to the lower surface of the engaging piece 6, the sliding surface 38 of the pawl 37 comes into contact with the edge of the adjacent engaging piece 6, and the pawl 37 and the slide plate 3
5 against the force of the spring 39, the 13th-
Move it to the right as shown in Figure 14. As a result, the periphery of the notch 39 of the lock plate 36 is separated from the large diameter portion of the lock pin 43, and the seal 11 is separated from the large diameter portion of the lock pin 43.
is brought into contact with the lid 3 and the main container 2. If the fire is turned on in this state, that is, when the lid 3 is properly closed, the pressure inside the main container 2 can be increased. The increase in internal pressure causes the lock pin 43 to rise, causing its large diameter portion to face the notch 39 in the lock plate 36. After cooking, when the internal pressure decreases, the lock pin 43 also decreases due to its own weight, resulting in the state shown in FIG.
When the spring 49 enters the slide plate 32
To the left, press the stopper piece 27 of the slide plate 32.
There is no contact with the lid body 3, and the lid body 3 can be rotated.

FIGS. 15-16 show a state in which the lid 3 is rotated when the internal pressure is high and the residual pressure is high. When the residual pressure inside the main body container 2 is high, the lock pin 43 still occupies a high position, so that its large diameter portion is connected to the notch 39.
to face. Therefore, even if the lid body 3 is rotated so that the claw 37 faces the horizontal piece 7 between the engagement pieces 6, the lock plate 36 does not move inward, and the slide plate 35 is moved to the stopper piece of the handle. 27 and prevents further rotation of the lid body 3. In other words, the spouting of cooked food caused by opening the lid 3 when the residual pressure is high is prevented. In addition, when the residual pressure is high, the tip of the lock pin 43 is made to protrude slightly from the upper handle, so that the cook can predict that the residual pressure is high.

A pin 50 is arranged to hold both ends of the pair of ribs 33 and 34, and this pin 50 is attached to the nut plate 4.
0 groove to prevent the nut plate 40 from twisting when the valve body 42 is screwed into the nut plate 40, and also allows the slide plate 35 to move smoothly with the pin 50.

A glass window body 51 is attached to a suitable position on the lid body 3. As shown in FIG. 1, the glass window body 51 is made of a transparent body made of two circular heat-resistant and pressure-resistant glasses 52 laminated together.
The peripheral edge is covered with a sealing material 53, and this sealing material 5
3 is fixed to the transparent body of the glass 52 with upper and lower covers 54 and 55. The upper and lower covers 54 and 55 are fixed by spot welding or the like by butting their annular flanges together.
Alternatively, although not shown, a concave-convex engaging portion is engaged with the side edges of the upper and lower covers to integrate the upper and lower covers 54 and 55, and an annular groove 56 is formed. This groove 56 comes into contact with the back surface of the lid 3 when the glass window 51 is inserted into the hole 29 of the lid 3 from below. Bolts 57 are welded to three locations on the upper cover 54 to secure them. Alternatively, although not shown, a stop portion of an integral molded body may be provided. A glass window stopper 58 is arranged on the upper surface of the lid body 3. The stopper 58 has a circular central hole so that the inside of the container can be seen through the transparent body of the glass 52, and its peripheral edge has a plate-oriented side wall and a horizontal flange 59. Insert the glass window body 51 into the hole 29 of the lid body 3 with the gasket 60 arranged in the groove 56,
The gasket 60 is brought into contact with the lower surface of the lid 3. The lid body 3 is fitted with the stopper 58 to receive the bolt 57.
Place it on the top surface. Next, attach the nut 61 to the bolt 57.
When tightened, the flange 59 of the stopper 58 first comes into strong contact with the top surface of the lid 3. Further, when the nut 61 is tightened, the bolt 61 rises relative to the stopper 58, and the gasket 60 is pressed against the lower surface of the lid 3. In this way, the strong glass window body 51 can be fixed to the lid body 3 while ensuring the seal.

The example shown in FIG. 1 shows the upper handle 3 and the glass window body 51.
However, as shown in Fig. 23, the upper handle 3
The glass window body 51 may be attached regardless of this.
The example shown in FIG. 23 is basically the same as the example shown in FIG. 1, so the same parts are denoted by the same reference numerals and their explanations are omitted. In the example shown in FIG.
1, a cap nut is used so that the tip of the bolt 57 is not visible from the nut 61.

Another example of the sealing material 53 is shown in FIG. A large number of saw-blade-shaped protrusions 62 are extended from the inner and outer walls of the sealing material 23, which has a U-shaped cross section, and strongly contacts the end surface of the transparent body of the glass 52 and the upper and lower covers 54, 55 to form a seal. Improving sexuality.

In the illustrated example, a flat body is used as the transparent body of the glass 52, but a convex lens may also be used. In this case, the contents inside the container can be seen in an enlarged form, and water droplets gather in the center, which has the effect of preventing clouding. or,
When a concave lens is used, the field of view inside the container is expanded to show more of the interior, and water droplets flow to the periphery, which is effective in preventing clouding. Although not shown, a transparent body using a combination of these lens-shaped glasses may be used.

In the illustrated example, two pieces of glass are used, but of course one piece of glass may be used. Preferably, they are laminated and a transparent, heat-resistant adhesive or transparent film is inserted between them to strengthen the laminated glass and the like so that they are in close contact with each other to prevent the glass from being damaged or shattered by impact or the like.

Next, a second example of how the glass window body 51 is attached to the lid body will be described.
Shown in Figure 5-28. In the example shown in FIG. 25, the mating surfaces of the upper and lower covers 54, 55 extend outward to the side, and a gasket 60 is disposed at the end thereof. The periphery defining the hole 29 of the upper handle 3 extends to the periphery of the hole in the lid 3, and screws 62 are screwed into this periphery from the mating surfaces of the upper and lower covers 54, 55 to fix the glass window 51 to the lid 3. This is what I did. Insert the upper cover 54 into the hole 2 of the upper handle 5.
Place it in contact with the area around 9. The example shown in FIG. 26 is the same as the example shown in FIG. 25 except that the mounting position of the gasket 69 is different from the example shown in FIG. 25, so the explanation thereof will be omitted.

In the example shown in FIG. 27, a plurality of nut members 63 are fixed to appropriate positions on the upper cover 54, and
A peripheral edge 64 defining 9 covers this nut member 63. Screw the screw 62 into the nut member 63 from the peripheral edge 64, and attach the glass window body 51 to the lid body 3.
Fixed to. At this time, the gasket 60 strongly contacts the lower surface of the lid 3 to ensure sealing performance.

In the example shown in FIG. 28, the cover part 2 of the upper handle 5
In an example where 8 is not on the periphery of the hole in the lid body 3, the upper and lower covers 5
4 and 55 are not integrated, but a plurality of nut members 63 are welded to the upper cover 54 so as to be located between the periphery of the hole in the lid body 3 and the sealing material 53. At the time of attachment, the sealing material 53 for the peripheral edge of the transparent body of the glass 52 is applied to the horizontal piece of the upper cover 54, and the outer peripheral edge of the upper cover 54 is applied to the upper surface of the lid body 3. Next, the lower cover 55 is placed inside the lid 3 so that the sealing material 55 and its outer periphery are in contact with the inner surface of the lid 3. Screw the screws 62 into the nut member 63 through the lower cover 55, and attach the glass window body 51 to the lid body 3.
to be fixed.

In the example shown in FIG. 29, a glass window body 51 is connected to a lid body 3 having a handle 65 with a torque limiter.
It is fixed at . In this example, handle 65
When the arm 66 is rotated, the arm 66 rises and the stop 67
Its end comes into contact with. When the arm 66 stops moving, the subsequent rotational force of the handle 65 is transmitted to the lid 3 as a reaction force, and is pressed against the lid 3 and the main container. Furthermore, when the handle 65 is rotated, the torque limiter is activated and the handle 65 is rotated idly.

Incidentally, since the weight valve 68 and the float valve 69 are known ones, their explanation will be omitted here.

(Effects) In the present invention, since the slide plate is slid using the side edge of the engagement piece, there is no need to create a guide groove as in the conventional case, and the handle can be configured simply.
Furthermore, the contact between the stopper piece and the slide plate makes it possible to reliably prevent rotation of the lid, thereby preventing danger from ejection pressure when there is residual pressure inside the cooker.

[Brief explanation of drawings]

Fig. 1 is a cross-sectional view of an example of the present invention, Fig. 2 is a plan view of the container body, Fig. 3 is a bottom view of the lid, and Fig. 4-
Figure 8 is a sectional view showing each embodiment of the packing, Figure 9 is a plan view of the upper handle, Figure 10 is a perspective view of the slide plate, and Figures 11-16 are a plan view and side view showing the movement of the slide plate. 17-22 are cross-sectional views showing examples of various gaskets, FIG. 23 is a cross-sectional view showing another example of a glass window body, and FIG. 24 is a partial cross-sectional view showing another example of a sealing material. , FIGS. 25-28 are partial sectional views showing an example of how a glass window body is attached to a lid, and FIG. 29 is a sectional view showing another example of the present invention. In the diagram: 2... Main container, 3... Lid, 4, 5...
...handle, 6...engaging piece, 10...locking piece, 11...
...Packkin, 13, 14...Tang piece, 19...Packkin, 27...Stopper piece, 35...Slide plate, 36...Lock plate, 40...Nut plate, 41...Lock mechanism, 43...Lock pin , 45... Gasket, 51... Glass window body.

Claims (1)

[Claims] 1. A plurality of spaced apart protruding engagement pieces provided on the periphery of the opening of the main container are overlapped with a plurality of spaced apart engagement pieces provided on the side wall of the lid body to seal the two. In the pressure cooker, a slide plate is disposed on the handle fixed to the lid body, and one end of the slide plate receives the biasing force of a spring seated on the handle side, and the slide plate includes an L-shaped lock plate and a downwardly directed part of the lock plate. The lock plate has a claw fixed to the lock plate, and the claw of the slide plate comes into contact with an engaging piece of the main container to move the slide plate radially outward, and the protruding part of the lock plate is fixed to the lid body. When the claw of the slide plate is positioned between the engaging pieces of the main container, the slide plate is moved inward and the protruding portion of the lock plate moves the lock pin upwardly. A pressure cooker characterized by regulating upward movement of. 2. The pressure cooker according to claim 1, wherein when the lock pin is raised, the downwardly facing piece of the lock plate faces a stopper piece to prevent rotation of the lid. 3. The pressure cooker according to claim 1, wherein the slide plate is movable while being guided by a surface of a nut plate fixed to the lid. 4. The pressure cooker according to claim 1, wherein a claw of the slide plate is inserted into a hole in a side wall of the lid, and the claw can come into contact with a gasket.