JPH0427457Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a pressure cooker having an improved locking mechanism.

(Prior Art) A pressure cooker that cooks by engaging a locking piece of a lid with an engaging piece of a main container employs a locking mechanism that prevents the lid from being opened when internal pressure is high. The lock mechanism basically has a valve body fixed to the lid body and a lock pin that moves up and down in response to internal pressure within the valve body, and a gasket is arranged between the pressure receiving part of the lock pin and the lower surface of the valve body. In the composition, for example, Jikoaki
It is disclosed in JP-A No. 61-30565 and JP-A-60-160922.

In the gasket used in this known example, the gasket is fixed to the pressure receiving part of the lock pin, and an upwardly directed lip or protrusion is formed on the upper surface of the gasket.

(Problem to be solved by the present invention) When the internal pressure is high, the lock pin rises due to this pressure, but when the internal pressure decreases, the lock pin falls due to its own weight. However, if the gasket fixed to the lock pin comes into close contact with the lower surface of the valve body, the lock pin will not lower even though the internal pressure has decreased, making it impossible to rotate the lid body. Therefore, measures have been taken to prevent the gasket from adhering to the lower surface of the valve body even if it is exposed to boiling liquid or the like. In the conventional example described above, the means of fixing the gasket to the lock pin and the means of forming a lip or protrusion on the upper surface of the gasket are used, but these are not sufficient and the gasket tends to adhere to the valve body.

Therefore, the present invention aims to solve the problems of the prior art described above.

(Means for Solving the Problems) In order to solve the above-mentioned problems, the present invention provides a gasket consisting of an annular main body and lips extending radially outward from the top and bottom of the main body.

Furthermore, the gasket according to the present invention has an annular depression in the center of its outer circumferential surface.

(Function) The gasket according to the present invention is slidably assembled to the lock pin, and when the lock pin is raised, the upper lip presses the lower surface of the valve body, and the lower lip elastically presses the pressure-receiving portion of the lock pin. Therefore, when the internal pressure of the main container decreases, the lock pin will surely lower due to its own weight and the elasticity of the upper and lower lips. Even if the upper lip and the valve body get stuck due to boiling liquid, etc., the lower lip will help lower the lock pin, and the lock pin will automatically and reliably lower due to the reduced pressure, allowing the lid to rotate. .

(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 an annular convex shape of a circular arc portion 1516 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. The example shown in FIG. 5 omits the bulges 17 and 18 used in the example shown in FIG.
4 has a semicircular tip, and the rest are 4th.
This is the same as the example shown in the figure.

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 has the same shape as the part 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 portion of the main bodies of the gaskets 11 and 19 moves a portion of the lower tongue piece 14 to the outside of the horizontal piece 7, bringing the inside into communication with the outside, and releasing the internal 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 arcuate 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, prevent the gasket from being attached to the lid body. The annular wall in line contact with the inner wall surface 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 portion 28, and a portion provided in the main portion 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 within 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 makes it difficult for the lock pin 43 to be pushed away 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 placed in a fire,
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 35 against the force of the spring 39,
- Move it left and 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 1 is separated from the large diameter portion of the lock pin 43.
1 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 screwing the valve body 42 into the nut plate 40, and also to make the movement of the slide plate 35 smooth by 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 can be fixed by spot welding or the like with their annular flanges abutted against each other, or by engaging the side edges of the upper and lower covers with uneven engagement parts (not shown), so that the upper and lower covers 54 and 55 can be fixed by spot welding or the like. In addition to being integrated, 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 to allow viewing of the interior of the container through the transparent body of the glass 52, and its periphery has downward facing side walls 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 59,
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. Furthermore, 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 glass window body 51 can be firmly fixed to the lid body 3 while ensuring a 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 cloud formation. 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 so that they adhere tightly to each other to prevent the glass from breaking or scattering due to 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 and 55 extend outward to the side, and a gasket 60 is disposed at the end thereof. The glass window body 51 is fixed to the lid body 3 by screwing screws 62 into this peripheral edge from the mating surfaces of the upper and lower covers 54 and 55. 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 on 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) According to the present invention, by improving the lip of the gasket, it is possible to prevent it from adhering to the valve body, and since the mounting method is the same as before, there is no process change and its use is easy.

[Brief explanation of the drawing]

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 attaching a glass window body to a lid body, 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)

[Scope of utility model registration request] A locking piece extending radially inward from the side wall of the lid body is engaged with an engaging piece formed on the opening edge of the main body container, and when the residual pressure in the main body container is equal to or higher than a predetermined value, the above-mentioned In a pressure cooker provided with a locking mechanism that prevents the lid from rotating relative to the main container,
A gasket between a valve body fixed to the lid of the lock mechanism and a lock pin that moves up and down with respect to the valve body according to internal pressure is connected to an annular main body and a radially inward facing outer peripheral surface of the main body. 1. A pressure cooker characterized by having a recess and an annular lip extending radially outward above and below the recess.