JPS6130574Y2 - - Google Patents

Description

[Detailed explanation of the idea] [Technical field of invention] The present invention relates to a pot lid for a pressure cooker.

[Technical background of the invention and its problems]

Traditionally, pressure cooker lids have been designed to keep the internal pressure of the pressure cooker from approx.
It is made of thick and sturdy aluminum plate or stainless steel plate in order to withstand 1.85 atm and an internal temperature of approximately 115°C to 120°C.

Since the lid of such a pressure cooker does not allow you to see the inside, it is not possible to visually check the degree of simmering and cooking of the ingredients during cooking, so it is common to use a timer to check the cooking time while cooking. It was hot.

However, whenever you check the cooking time, you will find that the cooking time varies depending on the type of ingredients being cooked, and even for the same type of cooking ingredients, for example, the cooking time for new rice and old rice may differ. They differ greatly depending on the differences in their properties.

Therefore, the degree to which the ingredients are boiled and cooked must be determined by experience and taste, and cooking with a pressure cooker is not always easy.

In addition, since pressure cookers generate high pressure and heat, it is dangerous to open the pot while cooking, and the pressure will be lost and the pressure cooker will no longer function as a pressure cooker, so opening the pot during cooking will cause the ingredients to simmer. I couldn't even check the condition or doneness of the food.

Therefore, there has been a demand for a lid for a pressure cooker that allows you to visually check the inside of the pot and check how well the ingredients are cooked and cooked without having to open the pot.

By the way, the pot lid that allows the inside of the pot to be viewed without opening the pot has a structure shown in Japanese Utility Model Publication No. 50-31256, in which a transparent glass plate is fitted into a window hole formed in the metal lid leaving a peripheral edge. However, since pressure cookers produce high pressure and high heat, simply reusing such items could cause the transparent glass plate to break and become dangerous, making it impossible to ensure safety. .

In addition, a pot simply fitted with a flat transparent glass plate had the disadvantage that steam droplets adhering to the transparent glass plate made it difficult to see inside the pot.

[Purpose of invention]

This invention was developed in view of the above technical background, and it is a pressure cooker lid that has a tempered glass window on the metal lid body so that the inside can be seen visually, and is highly safe and easy to see inside the pot. The purpose is to provide the following.

[Summary of the idea]

In this invention, a window hole is formed by leaving a peripheral edge of the metal lid, and a safety valve is provided on this peripheral edge.
The feature is that a double layered spherical tempered glass plate is fixedly engaged with the window hole through a packing material so that the curved direction of the spherical surface is on the inside of the lid body, and pressure is applied through the tempered glass plate. This allows the inside of the pot to be visually inspected.

[Example of idea]

An embodiment of the present invention will be described below with reference to FIGS. 1 and 2.

1 is a pot lid of a pressure cooker, and this pot lid 1 has a circular window hole 4 in a metal lid body 2 leaving a peripheral edge 3, and a safety valve 5 and a handle 6 are provided in this peripheral edge 4. Two circular double-layered spherical tempered glasses 7, 7 are firmly engaged in the window hole 4 through a packing material 8 so that the direction of curvature of the spherical surfaces is on the inside of the lid 2.

The lid 2 is a so-called sliding type lid 2, which is formed of an aluminum plate or a stainless steel plate, and has engaging pieces 9 arranged at regular intervals on the outer periphery to engage with an opening of a pressure cooker (not shown). An annular rubber packing 10 is provided on the outer peripheral edge of the lower surface.

The lid body 2, in which a window hole 4 is formed leaving the peripheral edge 3, closes a valve by the biasing force of a spring, and when the internal pressure of the pressure cooker rises above a certain limit, The pressure cooker is equipped with a so-called spring safety valve 5 that opens when pushed by pressure and reduces internal pressure to keep the internal pressure of the pressure cooker constant.

The double tempered glass plates 7, 7, which are firmly engaged with the window hole 4, are overlapped with a transparent film 11 interposed therebetween. And each tempered glass plate 7, 7
The transparent film 11 is made thick enough to withstand internal pressure and heat even if only one film is used, and the transparent film 11 is made of a heat-resistant material such as polyvinyl resin.

Further, the double tempered glass plates 7, 7 have a diameter slightly larger than the diameter of the window hole 4, and one end is bent toward the outer peripheral edge of the lid body 2 to grip the edge portion of the peripheral edge 3 on the side of the window hole 4. At the same time, the lid body 2 is held by an annular engaging member 12 whose other end is bent toward the center of the window hole 4 and has a substantially S-shaped cross section and grips the outer periphery of the double tempered glass plates 7, 7. is engaged with the window hole 4 at the lower surface. Here, a double tempered glass plate 7 having a spherical shape,
7 is engaged with the window hole 4 so that the curvature direction of the spherical surface is directed toward the inside of the lid body 2 in a concave arc shape;
The end of the peripheral edge 3 on the side of the window hole 4 is bent toward the bottom of the lid 2 so as to follow the spherical shape of the double tempered glass plates 7, 7.

Packing material 8 such as silicone rubber is fitted into each gap between the outer periphery of the double tempered glass plates 7 and the engaging member 12 and between the engaging member 12 and the edge of the peripheral edge 3 on the window hole 4 side. , the engaging part is fixed.

Next, the operation of this embodiment will be explained.

The pot lid of this pressure cooker has an engaging piece 9 provided on the outer periphery of the lid body 2 and an engaging piece (not shown) provided corresponding to the opening edge of the pressure cooker containing cooking ingredients. Slide in the circumferential direction to engage and fit into the pressure cooker.

When a pressure cooker is heated, the ingredients begin to boil due to the heat, and the internal pressure of the cooker increases.
At this time, the double tempered glass plates 7, 7 have a diameter larger than the window hole 4, and are engaged with the window hole 4 on the lower surface of the lid body 2, and a packing material such as silicone rubber is placed in the gap between the engagement parts. Since material 8 is fitted,
As the internal pressure of the pressure cooker increases and pressure is applied to the double tempered glass plates 7, 7, the packing material 8 is compressed and the airtightness of the pressure cooker is increased.

And even if the internal pressure is about 1.85 atmospheres, 2
The heavy tempered glass plates 7, 7 can sufficiently withstand high pressure because they are made of double tempered glass plates 7, 7, which can withstand pressure even if they are alone.

In addition, the double tempered glasses 7, 7 have a spherical shape and are engaged with the window hole 4 with the curvature direction of the spherical surface facing the inside of the lid body 2, so the spherical shape contributes to improving pressure resistance. The pressure resistance of the double tempered glass plates 7, 7 is further improved. If you keep the surface of the glass clean with detergent and a sponge, there will be no clouding due to evaporated water, and the water droplets will flow well and collect at the lowest point in the center of the tempered glass plates 7, 7, forming large water droplets. and fall.

Furthermore, even if a shock is applied to the tempered glass plates 7, 7 due to an unexpected accident, the double tempered glass plates 7, 7 will not be easily damaged. Furthermore, tempered glass plates 7, 7
If the surface of the tempered glass plate 7 is scratched, cracks may occur at that location, but it is highly unlikely that the two tempered glass plates 7, 7 would be scratched at the same time. Therefore, even if one tempered glass plate 7 is scratched and broken, the other tempered glass plate 7 can maintain the internal pressure of the pot. Furthermore, since a transparent film 11 made of polyvinyl resin or the like is interposed between the double tempered glass plates 7, 7, broken pieces of glass will not scatter.

If the pressure becomes higher than necessary during cooking, the spring safety valve 5 is pushed by the internal pressure and opens to release the pressure to the outside, keeping the internal pressure constant.

As the cooking progresses, the double tempered glass plates 7, 7
Since you can visually see inside the pot through the pot, you can visually check how well the ingredients are cooked and how well they are cooked, and turn off the heat when you are sure that the cooking is complete.

Next, another embodiment of the present invention will be described. Note that the same parts as in the previous embodiment are designated by the same reference numerals, and the explanation thereof will be omitted.

The embodiment shown in FIG.
4 are overlapped by spot welding to form the peripheral edge 3 of the lid body 2, and the window hole 4 side end of the lower metal plate 13 forming the peripheral edge 3 of the lid body 2 is connected to the window hole 4.
It is bent into a substantially U-shape at the side edge position and folded back toward the outer periphery of the lid body 2, and further folded back toward the center of the window hole 4 so as to wrap around the outer periphery of the double tempered glass plates 7, 7. double tempered glass plate 7,
7, and also hold the edge of the upper metal plate 14 on the window hole 4 side, which forms the peripheral edge 3 of the lid 2, and the folded part of the lower metal plate 13 toward the outer periphery of the lid 2. An annular engagement member 15 that is bent into an arc toward the outer peripheral edge of the body 2 and has a substantially C-shaped cross section.
Grip the lid body 2 together, and
The outer periphery of the heavy tempered glass plates 7, 7 and the engaging member 15
A packing material 8 such as silicone rubber is fitted into the gap between the two.

In the embodiment shown in FIG. 4, an annular first engaging member 16 which is bent in an arc toward the center of the window hole 4 and has a substantially C-shaped cross section is used to connect the double tempered glass plates 7, 7. The end of the first engaging member 16 and the lid 2 are gripped by the annular second engaging member 17 which is bent in an arc toward the outer peripheral edge of the lid 2 and has a C-shaped cross section. Grip the peripheral edge 3 of the window hole 4 side edge of the double tempered glass plates 7, 7.
The gap between the outer peripheral edge and the first engaging member 16, the gap between the first engaging member 16 and the second engaging member 17, and the window hole 4 side of the second engaging member 17 and the peripheral edge 3. A packing material 8 such as silicone rubber is fitted into the gap between the ends and fixed.

In the embodiment shown in FIG. 5, the peripheral edge 3 of the lid body 2 is formed by overlapping two metal plates 13 and 14, similar to the embodiment shown in FIG. However, in the case of this embodiment, the end of the lower metal plate 13 on the side of the window hole 4 is made to hang down and is further bent toward the center of the window hole 4, and this bent part 18 and the edge of the window hole 4 of the upper metal plate 14 are bent. The outer periphery of the double tempered glass plates 7, 7 is held between the side edges, and the outer periphery of the double tempered glass plates 7, 7, the bent portion 18, and the window hole 4 side edge of the top metal plate 14. A packing material 8 such as silicone rubber is fitted into the gap between the holes and the packing material 8 is formed so as to wrap around the upper surface of the upper metal plate 14, and the packing material 8 is used to seal the edge of the upper metal plate 14 on the side of the window hole 4. It is designed so that it can be held.

As described above, various forms of means for firmly engaging the double spherical tempered glass plates 7, 7 in the window hole 4 are conceivable, but in particular, the embodiments shown in FIGS. 3 and 5 are conceivable. The two metal plates 13 and 14 are superimposed to form the peripheral edge 3 of the lid 2, and the outer peripheral edge of the double tempered glass plates 7 and 7 is formed at the edge of the lower metal plate 13 on the window hole 4 side. When holding the pressure cooker, the place where the internal pressure of the pressure cooker may leak is the bottom metal plate 1.
The window hole 4 of the peripheral edge part 3 is limited to one location between the side edge of the window hole 4 of the window hole 3 and the outer periphery of the double tempered glass plates 7, 7, and the embodiment shown in FIGS. The airtightness can be made higher than in the case where there is a risk of pressure leaking between the side ends and the engaging members 12, 17 as well.

In addition, in the above, it is not necessarily necessary to interpose the transparent film 11 between the double tempered glass plates 7, 7 having a spherical shape, but simply overlap the two sheets,
The peripheries of the tempered glass plates 7, 7 may be joined with adhesive. In this case, by joining the peripheral edges with adhesive, it is possible to prevent moisture and dirt from entering between the two tempered glass plates 7, 7.

[Effect of idea]

The present invention is constructed as described above, and in particular, a window hole is formed in the lid body, and a doubly stacked spherical tempered glass plate is firmly engaged with the window hole through a packing material, so that it can be easily used during cooking. Even if you use a pressure cooker, you can visually check the degree of boiling and cooking of the cooking ingredients, making cooking with a pressure cooker easy and accurate.Even those who are not accustomed to using a pressure cooker can use it with confidence. Even those who are accustomed to using the system can visually confirm the final determination of the degree of cooking, giving them greater peace of mind and enjoying the fun of cooking.

Furthermore, since the tempered glass plates are double-layered, they can sufficiently withstand the high pressure inside the pressure cooker, and the two plates will not break at the same time, ensuring sufficient safety.
Even if one of the two tempered glass plates breaks, the other one can withstand the internal pressure of the pot, so there is no chance of a serious accident. Furthermore, in the case where a transparent film is interposed between two tempered glass plates, broken pieces of glass are prevented from scattering, and there is no increase in the risk of breakage. In addition, the tempered glass plate is firmly engaged with the window hole through the packing material, so that the peripheral edge of the tempered glass plate does not come into contact with the engaging member or the edge of the peripheral edge of the lid on the window hole side. No damage caused by. Moreover, the double tempered glass plate has a spherical shape, and the curved direction of the spherical surface is directed towards the inside of the lid, which further improves the pressure resistance against the internal pressure of the pot and further increases safety. At the same time, the water droplets adhering to the spherical surface gather at the center of the lower part of the tempered glass plate and form large water droplets that fall into the pot, so the tempered glass plate does not become cloudy and the inside of the pot can always be clearly seen.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing one embodiment of the present invention;
The figure is a partial longitudinal sectional view of this embodiment, and FIGS. 3 to 5 are partial longitudinal sectional views of other embodiments. 2...metal lid, 3...periphery, 4...window hole, 5...safety valve, 7...tempered glass plate, 8...
Packing material, 11...Transparent film.

Claims (1)

[Scope of claim for utility model registration] (1) A window hole is formed in the metal lid body leaving the peripheral edge,
A safety valve is provided on the periphery, and a double spherical tempered glass plate is firmly engaged with the window hole through a packing material so that the direction of curvature of the spherical surface is on the inside of the lid. Pressure cooker lid. (2) The pot lid for a pressure cooker according to claim 1, wherein the double layered tempered glass plates are stacked with a transparent film interposed therebetween.