JP2001240094A - Lid structure of heat reserving container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lid structure of a heat reserving container capable of washing a lid member as it is, excellent in heat resistance to withstand long- term use and excellent in heat reserving properties. SOLUTION: The lid member 12 is constituted of a metal outer lid 16 and a metal inner lid 17 and the outside end of the outer lid 16 is welded to the inner lid 17 over the whole periphery thereof to form a heat insulating space S2 between the inner and outer lids 17, 16.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lid structure of a heat retaining container in which a lid body is constituted by a metal outer lid and a metal inner lid.

[0002]

2. Description of the Related Art Conventionally, the lid structure of this kind of thermal insulation container is shown in FIG.
As shown in FIG. 1, a lid 12 covering the opening of the heat insulating container 3 formed by the inner and outer containers 1, 1 is provided with an inner lid 17 made of a synthetic resin, and a heat insulating material 27 between the inner lid 17. The lid 12 was composed of the outer lid 16 made of a synthetic resin and forming the filled exterior body.

[0003]

However, with such a lid structure of the heat retaining container, since the entire outer surface of the lid body 12 is formed of synthetic resin, the lid 12 is easily damaged when being washed by round washing. Dust, foreign matter, etc. adhere to the area marked with, causing dirt, and the dirt grows due to the dirt, which is not preferable in terms of hygiene. At the same time, durability may be lacked due to long-term thermal deterioration due to heat from cooked juice or cooked food kept in the heat retention container. On the other hand, for large-capacity insulated containers for business use such as lunches and restaurants, it is necessary to perform heat cleaning treatment such as hot water washing or hot air disinfection in consideration of hygiene considerations. A lid had a problem with its heat resistance.

[0004] Further, in this kind of thermal insulation container, FIG.
Although a metal lid structure as shown in FIG. 1 is also known, such a lid structure solves the problem of the conventional lid structure shown in FIG. Since the lid 12 is configured to simply cover the opening of the heat retaining container with a single flat plate, there has been a problem with the basic function of the heat retaining container, which lacks heat retaining properties.

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and the cover can be washed and washed, and dust and foreign matter can be easily removed and kept clean for a long period of time. An object of the present invention is to provide a lid structure of a heat retaining container which is hygienic, has excellent heat resistance, can withstand long-term use, and has excellent heat retaining properties.

[0006]

In order to achieve the above object, in the lid structure of the heat retaining container according to the first aspect of the present invention, an outer casing having an inner space and an insulating space formed between the inner container and the inner container. An outer container forming a body constitutes a main container, and a lid is provided to cover an opening of the main container.
It is composed of a metal outer lid and a metal inner lid, and the outer end of the outer lid is welded to the inner lid over the entire circumference to form a heat insulating space between the inner and outer lids. In such a configuration, by welding the outer end of the outer lid to the inner lid over the entire circumference, the sealing between the inner and outer lids is ensured by sealing between the inner lid and the outer lid, so that it is possible to prevent water from entering and to wash the whole lid. With the inner and outer lids made of metal accordingly, dust and foreign matter due to surface scratches and the like are less likely to adhere,
Even if they adhere, they can be easily removed and easily cleaned, and can be subjected to a heat cleaning treatment such as hot water cleaning or hot air disinfection, resulting in a sanitary one.

[0007] Further, it is possible to prevent heat deterioration due to the heat from the heated cooking juice or cooked material, and it is excellent in heat resistance and can withstand use for a long period of time. Forming a space also exhibits an excellent effect of heat insulation as a heat insulating effect.

In the lid structure of the heat retaining container according to the present invention, the heat insulating space is formed by filling a heat insulating material to further improve the heat retaining property.

According to a third aspect of the present invention, in the lid structure of the thermal insulation container according to the present invention, the lid body is formed by two members, an inner lid made of a single metal member and an outer lid made of a single metal member. It is characterized by forming the entire outer surface.

In such a configuration, the metal inner and outer lids 2
Since the double lid can be formed with the minimum number of parts of only the members, the components of the lid can be simplified as much as possible.

Further, in the lid structure of the heat insulating container according to the present invention, the main body container is made of metal which forms a metal inner container and an outer package having an insulating space formed between the inner container and the inner container. And an outer container.

In such a configuration, since the main body container is made of metal together with the lid made of metal, the main body container is also easy to clean and sanitary.

According to a fifth aspect of the present invention, in the lid structure of the heat retaining container according to the present invention, the inner lid forms a side portion fitted into the main body container, and the upper end edge of the fitted side portion is provided at the upper edge of the main body container. Forming an outer flange placed on the opening edge of the outer flange, and forming, on the outer peripheral edge of the outer flange, an annular hanging portion that hangs outward so as to surround the opening edge of the main container between the fitting side portion. It is characterized by.

In such a configuration, the lid forms an annular hanging portion that hangs outward so as to surround the opening edge of the main container between the fitting portion and the side portion fitted to the outer peripheral edge thereof. The surrounding area between the opening edge and the lid placed on the opening edge is widened, heat in the inner container is prevented from escaping to the outside air as much as possible, and heat insulation from the opening edge of the main container is maintained and heat insulation is maintained. Is improved.

In the lid structure of the heat insulating container according to the present invention, the top surface of the opening edge of the main body container is formed by a band-shaped flat surface having a predetermined width, and the flat surface has the inner surface. The outer flange of the lid is mounted.

In such a configuration, the top surface of the opening edge of the inner container is formed by a band-shaped flat surface having a predetermined width, so that the lid placed on this opening edge comes into surface contact with the outer flange of the lid. The contact area is increased, the airtightness with the lid is further improved, the heat retention is improved, and the mounting state of the lid is also stabilized.

According to a seventh aspect of the present invention, there is provided the lid structure of the thermal insulation container according to the present invention, wherein an outer peripheral end of the outer lid is welded to the entire upper surface of the outer flange formed on the inner lid. .

With this configuration, when the outer peripheral end of the outer lid is welded over the entire circumference, the outer lid can be welded from the upper surface of the outer flange formed on the inner lid in an upright posture of the lid. The work is facilitated and the workability is improved.

Further, in the lid structure of the thermal insulation container according to the present invention, the outer lid has a side portion rising upward from the inner lid, and an outer flange is formed on a base end edge of the rising side portion. The outer flange of the outer lid is overlapped with the outer flange of the inner lid, and the outer end of the outer flange of the outer lid is welded to the outer flange of the inner lid over the entire circumference. .

In such a configuration, the outer flange of the outer lid is welded to the outer flange of the inner lid over the entire circumference by overlapping the outer flange of the outer lid with the outer flange of the inner lid. Therefore, the welding operation is further facilitated, and the welding workability is improved.

According to a ninth aspect of the present invention, the lower end of the annular hanging portion of the inner lid is formed at the lowermost part of the bottom of the inner lid fitted in the main body container. It is characterized in that it hangs down below.

In such a configuration, when the lid is removed and placed on a flat base, the lower end of the annular hanging portion is placed first, and the bottom of the inner lid fitted into the main body container floats from the flat base. In this state, the bottom portion of the inner lid does not come into contact with the flat base even in such a placement state, so that adhesion of dirt is prevented and sanitation is achieved.

According to a tenth aspect of the present invention, in the lid structure of the heat retaining container according to the present invention, an inclined portion is formed on the rear surface of the bottom of the inner lid so as to gradually decrease from four sides of the outer part toward the center. And

In such a configuration, water droplets containing cooking juice and the like adhered to the outer portion of the bottom surface of the bottom of the inner lid are gently lowered from the four sides of the outer portion toward the center, and flow down along the slope. Since the droplets are partially concentrated and dropped at the center, the dispersed droplets from the four sides of the bottom of the inner lid are prevented, and the water droplets containing the cooking juice and the like are dispersed at extra places on the mounting table. It is also easy to maintain.

In the lid structure of the heat insulating container according to the present invention, an annular groove having a predetermined width is formed at the center of the upper surface of the outer lid, and the annular groove is formed at a plurality of locations around the annular groove. A radiation groove communicating with the groove on the same surface and reaching the outer end is formed.

In such a configuration, by forming an annular groove having a predetermined width in the center of the upper surface of the outer lid, the upper surface of the lid can be reinforced to have a robust structure. By forming the radiation groove communicating with the annular groove on the same surface and reaching the outer end, when cleaning the annular groove of the lid, it is possible to wash out the annular groove from the annular groove through the radiation groove. It is easy to wash without water accumulation.

[0027] Further objects and features of the present invention will become apparent from the following detailed description and drawings. Each feature of the present invention can be used alone or in various combinations in combination as far as possible.

[0028]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Some preferred embodiments of the present invention will be described below with reference to FIGS.
0 to facilitate understanding of the present invention.

However, the present invention is not limited to the following embodiments, and the material shapes of the components described in the following embodiments are within the scope of the present invention unless otherwise specified. Is not intended to be limited to them only,
It is only an illustrative example.

In the present embodiment, in the metal heat insulating container shown in FIGS. 1 and 2, a metal inner container 2 and a metal outer container having a space S formed between the inner container 2 and the inner container 2 are formed. The outer container 1 of the inner container 2 constitutes a main body container 3, and the hanging edge 6 of the inner container 2 is bent outward to form a drooping portion 6 which hangs down. The main body is welded by welding 9 to the overlapping end 6a located outside the overlapping portion 8 and welding the opening edges 4, 7 of the inner and outer containers 1, 2. Container 3
The opening edge 3a is formed.

In such a structure, the opening edges 4 and 7 of the inner and outer containers 1 and 2 are welded to form the opening edge 3 of the main container 3.
The main container 3 can be washed and washed by eliminating the gap between the two forming the a and preventing the intrusion of water. In conjunction with that, the hanging part bent outward and bent down to the opening edge 4 of the inner container 2 6, the opening edge 7 of the outer container 1 is overlapped and welded to the hanging portion 6 with a predetermined width in the height direction.
The formation of the welded portion 9 eliminates unnecessary projections and protrusions, and is formed as a continuous surface extending from the hanging portion 6 along the outer surface of the outer container 1, so that dust, foreign matter, and the like are less likely to adhere. Even if adhered, it can be easily removed and easily cleaned, and it can be kept clean and hygienic for a long time.

The main container 3 is composed of two members: an inner container 2 made of a single metal member such as stainless steel, titanium, aluminum, and iron, and an outer container 1 made of a single metal member. are doing. This inner container 2 and outer container 1
May be the same metal material or a combination of different metal materials, and can be arbitrarily selected depending on the use, purpose of use and the like. By forming the double container with the minimum number of parts of only two members by the metal inner and outer containers 1 and 2 in this way, the components of the main container 3 can be simplified as much as possible. The leg portions 25 and the convex portions 26 projecting in a cross shape for reinforcement are also integrally press-formed together with the formation of the outer container 3.

The main container 3 is provided with a heat insulating material 11 in a space S1 at the bottom formed between the metal inner container 2 and the metal outer container 1 serving as an exterior body. In addition to improving the heat retaining effect of the heat insulating material, the dent of the inner container 2 toward the outer container 1 against the weight and impact applied to the inner container 2 is prevented, and the dimensional interval therebetween is stabilized. The heat insulating material 11 is preferably made of foamed P or P in consideration of heat resistance, but may be made of foamed urethane or glass wool or the like, and is formed by a hollow donut-shaped flat plate as shown in the right half of FIG. Alternatively, as shown in the left half of FIG. 1, it may be arranged from the bottom to the side rising from the side. Can be set freely.

In place of the heat insulating material 11, a vacuum can be applied between the inner container 2 and the outer container 1 to form the main container 3 as a vacuum double container to further improve the heat retaining property.

Further, in the main body container 3, a downwardly directed annular step portion 10 around the outer side is provided below the opening edge 7 of the outer container 1, which is overlapped with the hanging portion 6 formed on the opening edge 4 of the inner container 2. By forming the downwardly facing annular stepped portion 10, the opening size of the outer container 1 becomes stable, the superimposition with the hanging portion 6 of the inner container 2 becomes easy, and the assembling workability is improved. And this downward annular step 1
With the formation of 0, the opening edge 7 of the outer container 1 is reinforced, and together with lap welding, the opening edge 3a of the main container 3 is made more robust.

The main body container 3 forms the opening edge 3a of the main body container 3 with the inner and outer containers 1 and 2 made of metal as described above, and stainless steel, titanium,
The cover 12 is made of a metal such as aluminum or iron. Since the lid 12 is also made of metal together with the main body container 3 made of metal, the lid 12 is also easy to clean and sanitary.

As shown in FIGS. 1 to 4, the lid 12 is composed of a metal outer lid 16 and a metal inner lid 17. By welding over the circumference, the sealing between the inner and outer lids is ensured by the welding between the inner and outer lids, so that the infiltration of water can be prevented so that the inner and outer lids 16 and 17 can be made of metal. Due to the formation, dust and foreign matter due to surface scratches and the like are hard to adhere, and even if they do adhere, they can be easily removed and easily cleaned, and heat cleaning treatment such as hot water cleaning or hot air disinfection can be performed. It can be made hygienic.

Further, it is possible to prevent heat deterioration due to heated cooking juice or heat from the cooked material, to have excellent heat resistance and to withstand long-term use.
Forming the heat insulating space S2 between 6 and 17 provides an excellent effect of heat insulation as a heat insulating effect.

In this configuration, the heat insulating space S2 is
7 is filled, and the heat insulating material 27 is filled to achieve a heat insulating effect. At the same time, the opening of the main body container 3 is closed by at least 90% or more of the opening area to keep the temperature. To further improve the performance.

The heat insulating material 27 is made of the heat insulating material 1 of the main container 3.
Similar to 1, foam P, P is preferable in consideration of heat resistance, but urethane foam, glass wool, or the like may be used, and the shape, arrangement position, and the like of the lid 12, heat insulation,
It can be set freely according to the arrangement workability and the like.

In place of the heat insulating material 27, the space between the inner lid 17 and the outer lid 16 may be evacuated to form the lid 12 as a vacuum double lid to further improve the heat retention. Also,
The lid 12 has two members, an inner lid 17 made of a single metal member and an outer lid 16 made of a single metal member.
The entire outer surface of the lid 12 is formed. In such a lid 12, a double lid can be formed with a minimum number of parts of only the two members of the inner and outer lids 16 and 17 made of metal, so that the components of the lid 12 are simplified as much as possible. .

Therefore, in addition to the structure of the metal lid 12, the main body container 3 is also made of metal for the inner and outer containers 1 and 2 so that it can be easily cleaned together with the main body container 3 and is sanitary. Become.

The inner lid 17 forms a side portion 17b to be fitted into the main body container 3, and this inner side portion 17b
An outer flange 17d to be placed on the opening edge 3a of the main body container 3 is formed at the upper end edge of the main body container 3 between the fitting side portion 17b and the outer peripheral edge 17a of the outer flange 17d.
Annular hanging part 1 hanging outward to surround opening edge 3a
7e.

As described above, the lid body 12 has an outer peripheral edge 17a.
Opening edge 3a of main body container 3 between side portion 17b
Is formed so as to surround the opening edge 3a of the main body container 3 and the opening edge 3a.
The surrounding area with the lid 12 placed on the container is increased,
The internal heat is prevented from escaping to the outside air as much as possible.
The heat insulation with the opening edge 3a is maintained, and the heat retention is improved.

At the same time, the top surface of the opening edge 3a of the main body container 3 is formed by a band-shaped flat surface having a predetermined width, and the outer flange 17d of the inner lid 17 is placed on this flat surface. The contact area due to surface contact with the outer flange 17d of the inner lid 17 placed on the opening edge 3a increases, and the lid 1
The air-tightness with the cover 2 is further improved, the heat retention is improved, and the mounting state of the lid 12 is also stabilized.

In this case, the outer peripheral end 16a of the outer lid 16 is welded over the entire circumference to the upper surface of the outer flange 17d formed on the inner lid 17. Thereby, in this welding, it is possible to perform welding in the upright posture of the lid 12 from the upper surface of the outer flange 17d formed on the inner lid 17, so that the welding operation is facilitated and the workability is improved. Become.

The outer lid 16 forms a side 16b that rises above the inner lid 17, and
An outer flange 16d forming an outer peripheral end 16a is formed at a base end edge of the outer lid 16 and the outer flange 16d of the outer lid 16 and the inner lid 17d.
The outer flange 16d of the outer lid 16 is welded to the outer flange 17d of the inner lid 17 over the entire circumference. By overlapping the inner and outer flanges 16d, 17d, the outer end 16a of the outer flange 16d of the outer cover 16 can be welded to the outer flange 17d of the inner cover 17 over the entire circumference, so that the welding operation is further improved. It becomes easy and welding workability is improved.

As described above, the outer flange 1 of the outer lid 16 is
When the outer flange 16d of the outer lid 16 is welded to the outer flange 17d of the inner lid 17 over the entire circumference by overlapping the 6d and the outer flange 17d of the inner lid 17 with each other, FIG. At the stage before welding shown, the outer peripheral end 16a of the outer flange 16d of the outer lid 16 is
A curved end portion 16f is formed in the same shape as a curved corner portion 17f reaching an annular hanging portion 17e which is drooped while being curved from above, and the curved end portion 16f is fitted to the curved corner portion 17f, whereby the outer lid 16 is formed. And the inner lid 17 are overlapped to perform welding positioning.

Then, the curved end portion 1 is attached to the curved corner portion 17f.
6f, the vicinity of the curved end 16f of the outer flange 16d is welded Y over the entire circumference, the welding position Y is cut off, and the curved end 16f is removed. As shown in FIG.

By forming such a curved end portion 16f, welding positioning of the inner lid 17 and the outer lid 16 can be easily and reliably performed, and the welding operation can be performed from the upper vertical position. The efficiency of the welding operation is improved. At the same time, the curved end portion 16f required for positioning associated with this welding
Is removed after the welding, the finish of the welded end surface is improved, unnecessary projections and overhangs are also eliminated by this welding, and a continuous surface is formed from the curved corner portion 17f along the annular hanging portion 17e. , Dust, foreign matter, etc. are hard to adhere, and even if they adhere, they can be easily removed and easily cleaned, so that they can be kept clean and hygienic for a long time.

The welding positioning structure between the inner lid 17 and the outer lid 16 shown in FIG.
6a is formed by forming an end 16f which is inclined from the outer flange 17d of the inner lid 17 and has the same shape as the inclined angle portion 17f reaching the annular hanging portion 17e.

Further, the welding positioning structure of the inner lid 17 and the outer lid 16 shown in FIG. 7 is provided on the upper surface of the outer flange 16d of the outer lid 16 and the annular ridge 17g formed on the upper surface of the outer flange 17d of the inner lid 17. It is constituted by forming an annular ridge 16g of the same shape to be fitted.

The other configurations in FIGS. 6 and 7 are the same as those in FIG. 5 and the welding process, and therefore detailed description is omitted.

The lower end 17h of the annular hanging portion 17e of the inner cover 17 is curled into a circular cross section and subjected to an end face treatment, and the back surface formed at the lowest position of the bottom portion 17t of the inner cover 17 fitted in the main body container 3. It is hung below 17k. By doing so, when the lid 12 is removed and placed on a flat base, the lower end 1
7h is placed first, and the bottom surface 17k of the bottom 17t of the inner lid 17 to be fitted in the main body container 3 is in a state of floating above the flat base. 17t does not come into contact with the flat base, and adhesion of dirt is prevented, resulting in a sanitary condition.

Further, an inclined portion 17m is formed on the bottom rear surface 17k of the inner lid 17 so as to gradually decrease from four sides on the outer side toward the center, and is formed on the outer surface of the bottom rear surface 17k of the inner lid 17. Since the water droplets containing the attached cooking juice etc. gently descend from the four sides of the outer part toward the central part and flow down along the inclined part 17m of the slope, and are partially concentrated and dropped at the central part, The water droplets containing the cooking juice and the like are prevented from being dispersed and dripped from the four sides of the bottom rear surface 17k of the inner lid 17 at extra portions of the mounting table, so that maintenance is easy.

As shown in FIG. 8, the outer lid 16 has an annular groove 16g having a predetermined width in the center of the upper surface thereof, and the annular groove 16g is formed at a plurality of locations around the annular groove 16g.
A radiation groove 16h communicating with the same surface as g and reaching the outer end is formed. By forming this annular groove 16g, the lid 1
The upper surface of the cover 16 can be reinforced to have a robust structure. Accordingly, by forming a radiation groove 16h communicating with the annular groove 16g on the same surface and reaching the outer end, the annular groove 16g of the lid 16 can be formed. Can be washed away from the annular groove 16g through the radiation groove 16h,
Cleaning water is not accumulated in 6 g and is easy to clean.

The annular groove 16g of the outer cover 16 is formed at a position corresponding to the position of the plurality of projections 25 formed on the bottom of the outer container 1 of the main body container 3. The groove width A of the annular groove 16g is slightly wider than the outer diameter A. With such a configuration, the main body container 3 is lifted, and the legs 25 are formed from the upper surface of the lid 17 in the main body container 3 separate from the main body container 3 into annular grooves 16g.
The main body container 3 can be stacked in a state where the lid 12 is covered with the main body container 3 in this manner, so that it is convenient for storage and carrying. Has become.

The body container 3 has a downward step 14 formed on the outside of the body of the outer container 1, and the outside diameter C of the body at the bottom 15 below the step 14 is larger than the inside diameter D of the opening of the inner container 2. It is formed in a small diameter so that the bottom portion 15 of the main body container 3 can be fitted from the opening edge 3a of the main body container 3 separate from the main body container 3, and the main body container 3 is removed even when the lid 12 is removed. 3 can be stacked so that stacking can be properly used according to each state such as storage and carrying.

Further, as shown in FIG. 10, unlike the large-capacity heat-insulating container shown in FIG. 1, the main container 3 has a maximum diameter of the body of the outer container 1 within a range which can be held by a small hand. It is configured to be long and to keep the small volume of liquid content warm.

Even in such a configuration, the lid 13 is constituted by the metal outer lid 16 and the metal inner lid 17, and the inner lid 17 is formed.
By welding the outer end of the outer lid 16 over the entire circumference, sealing between the inner and outer lids is ensured by welding between the inner and outer lids, so that water can be prevented from entering, and the main container 3 can be washed. For example, even when used as a directly-drinkable bottle or mug that can be carried and held by hand, it can also be used as a container with excellent hygiene and high heat retention.

The main container 3 shown in FIG. 10 constitutes a vacuum double container in which the inner and outer containers 1 and 2 are evacuated, and the outer container 1
An opening 19 for evacuation is formed integrally with the bottom of the outer container 1 together with the formation of the outer container 1, and a sealing member 20 for sealing the opening 19 at the time of vacuum is provided.

The other structure and the operation and effect provided by the structure are not particularly different from those of the present embodiment.
Overlapping illustrations and descriptions are omitted.

[0063]

According to the lid structure of the heat retaining container of the present invention, the main container is constituted by the inner container and the outer container forming the exterior body having the heat insulating space formed between the inner container and the inner container. A lid for covering the opening of the container is provided, and this lid is constituted by a metal outer lid and a metal inner lid, and the outer end of the outer lid is welded to the inner lid over the entire circumference. Therefore, the sealing between the inner and outer lids ensures the airtightness, prevents water from entering, and makes it possible to wash and wash the inner and outer lids. It is difficult for dust and foreign matter to adhere, and even if they adhere, they can be easily removed and easily cleaned, and can be heated and sanitized by washing with hot water or hot air. .

Further, it is possible to prevent heat deterioration due to heated cooking juice and heat from the cooked material, to have excellent heat resistance and to withstand long-term use. Forming a space also exhibits an excellent effect of heat insulation as a heat insulating effect.

In the lid structure of another heat insulating container according to the present invention, the heat insulating space is formed by filling a heat insulating material to further improve the heat insulating property.

Further, in the lid structure of another thermal insulation container according to the present invention, the entire outer surface of the lid is formed by two members, an inner lid made of a single metal member and an outer lid made of a single metal member. By forming, the double lid can be formed with the minimum number of parts of only two members of the metal inner and outer lids,
The components of the lid can be simplified as much as possible.

In the lid structure of another heat insulating container according to the present invention, the main container is a metal inner container and a metal outer container forming an exterior body having an insulating space formed between the inner container and the inner container. With this configuration, the main container as well as the lid made of metal can be easily cleaned and sanitary.

In the lid structure of another heat insulating container according to the present invention, the inner lid has a side portion fitted into the main body container, and an upper edge of the fitted side portion has an opening edge of the main body container. An outer flange is formed on the outer flange, and an outer circumferential edge of the outer flange is formed with an annular hanging portion that hangs outward so as to surround an opening edge of the main container between the fitting side portion and the outer flange. The surrounding area between the opening edge of the main container and the lid placed on the opening edge is widened, heat in the inner container is prevented from escaping to the outside air as much as possible, and heat insulation with the opening edge of the main container is maintained. As a result, the heat retention can be improved.

In the lid structure of another heat retaining container according to the present invention, the main container is placed on the opening edge by forming the top surface of the opening edge with a flat band-like surface having a predetermined width. The contact area due to surface contact with the outer flange of the lid is increased, airtightness with the lid is further improved, heat insulation is improved, and the mounting state of the lid is also stabilized.

Further, in the lid structure of another thermal insulation container according to the present invention, the outer peripheral end of the outer lid is welded to the upper surface of the outer flange formed on the inner lid over the entire circumference, so that the outer peripheral surface of the outer lid is formed. When the ends are welded over the entire circumference, welding can be performed in an upright posture of the lid from the upper surface of the outer flange formed on the inner lid, so that welding work is facilitated and workability is improved.

Further, in the lid structure of the heat retaining container according to the present invention, the outer lid forms a side that rises above the inner lid, and forms an outer flange at a base end edge of the rising side. The outer flange of the lid was overlapped with the outer flange of the inner lid, and the outer flange of the outer lid was welded to the outer flange of the inner lid over the entire circumference, so that the outer flange of the outer lid was By overlapping the outer flange of the lid with the outer flange of the inner lid, the outer peripheral edge of the outer flange of the outer lid can be welded over the entire circumference, so that the welding operation is further facilitated and the welding workability is improved. Improvement is achieved.

Further, in another heat retaining container lid structure according to the present invention, the lower end of the annular hanging portion of the inner lid is lower than the lower surface formed at the lowest position of the bottom of the inner lid fitted in the main container. When the lid is removed and placed on a flat base, the lower end of the annular hanging part is placed first, and the bottom of the inner lid fitted in the main body container floats from the flat base. Therefore, even in such a placement state, the bottom portion of the inner lid does not contact the flat base, and the attachment of dirt is prevented, and sanitation is achieved.

In the lid structure of another thermal insulation container according to the present invention, the inner lid is provided with an inclined portion having a gradually decreasing slope from the four sides of the outer portion toward the center portion on the bottom rear surface of the inner lid. Water droplets containing cooking juice etc. attached to the outer part of the bottom back surface gently descend from the four sides of the outer part toward the central part, flow down along the slope of the slope, and partially concentrate at the central part Since the droplets are dropped, the dispersed droplets from the four sides of the bottom of the inner lid are prevented, and the water droplets containing the cooking juice and the like are not dispersed at extra portions of the mounting table, so that the cleaning can be easily performed.

In another lid structure of the heat retaining container according to the present invention, an annular groove having a predetermined width is formed at the center of the upper surface of the outer lid, and the annular groove is formed at a plurality of positions around the annular groove. By forming a radiation groove that communicates with the surface and reaches the outer end, the top surface of the lid can be reinforced and a robust structure can be formed, and accordingly, it communicates with the annular groove on the same surface and reaches the outer end By forming the radiation groove, when cleaning the annular groove of the lid, the annular groove can be washed out from the annular groove through the radiation groove, and the annular groove can be easily cleaned without washing water being accumulated.

The annular groove of the outer lid is formed at a position corresponding to the position of a plurality of legs forming projections formed at the bottom of the outer container of the main body container. By forming the groove width of the annular groove to be slightly wider, the main body container is lifted, and the leg portion is placed from the upper surface of the lid of the main body container separate from the main body container so as to be fitted into the annular groove. Thus, a stacking structure in which the main body containers are stacked in a state where the lid body is covered with the main body container can be provided, and handling such as storage and carrying becomes convenient.

[Brief description of the drawings]

FIG. 1 is a sectional view of a heat retaining container according to an embodiment of the present invention.

FIG. 2 is an enlarged sectional view of a main part in FIG.

FIG. 3 is a sectional view of a lid of the heat retaining container in FIG. 1;

FIG. 4 is an enlarged sectional view of a main part of a lid of the heat retaining container in FIG. 1;

FIG. 5 is an enlarged cross-sectional view of a main part of the thermal insulation container in FIG. 1 before welding a lid body.

FIG. 6 is an enlarged cross-sectional view of another main part of the lid of the heat retaining container in FIG. 1 before welding.

7 is an enlarged sectional view of another main part of the lid of the heat retaining container in FIG. 1 before welding.

FIG. 8 is a top view of a lid of the heat retaining container in FIG. 1;

FIG. 9 is a bottom view of the heat retaining container in FIG. 1;

FIG. 10 is a cross-sectional view of a heat retaining container showing another example according to the embodiment of the present invention.

FIG. 11 is a sectional view showing a conventional example.

FIG. 12 is a sectional view showing another conventional example.

DESCRIPTION OF SYMBOLS 1 Outer container 2 Inner container 3 Main container 3a Opening edge 4 Opening edge 5 Outer flange 7 Opening edge 9 Welded part 12 Lid 16a Outer peripheral end 16b Rising side 16d Outer flange 17a Outer peripheral edge 17b Fitting side 17d Outer flange 17e Annular hanging part

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Isamu Enomoto 5-4-1-14 Tatsuminami, Ikuno-ku, Osaka-shi Inside Nakanishi Works (72) Inventor Yoshikazu Tatsumi 5-4-1-14 Tatsumiminami, Ikuno-ku, Osaka-shi Shares (72) Inventor Katsuichi Ishibashi 3-15-48 Hishie, Higashiosaka-shi Ishibashi Tech Co., Ltd. (72) Inventor Hiroshi Ueda 3-1 Hayamicho, Kadoma-shi, Osaka Pref. F term (reference) 3E067 AA03 AA11 AB01 BB11B BB11C BC07B BC07C CA17 CA18 FA04 GA06 GA13 GA14 GD10 3E084 AA02 AA12 BA02 CC01 CC08 DA01 DC01 EA03 EC01 FA09 GA08 GB12

Claims (11)

[Claims] 1. A main container is constituted by an inner container and an outer container forming an exterior body having a heat insulating space formed between the inner container and a lid for covering an opening of the main container is provided. This lid is constituted by a metal outer lid and a metal inner lid,
A lid structure for a heat retaining container, wherein an outer end of an outer lid is welded to the inner lid over the entire circumference to form a heat insulating space between the inner lid and the outer lid. 2. The lid structure according to claim 1, wherein the heat insulating space is formed by filling a heat insulating material. 3. The lid according to claim 1, wherein the entire outer surface of the lid is formed by two members: an inner lid made of a single metal member and an outer lid made of a single metal member. Lid structure of thermal insulation container. 4. The main body container according to claim 1, wherein the inner container is made of a metal and an outer container made of a metal which forms an exterior body having a heat insulating space formed between the inner container and the inner container.
The lid structure of the heat retaining container according to any one of claims 3 to 3. 5. The inner lid forms a side portion to be fitted into the main body container, and an outer flange mounted on an opening edge of the main body container is formed at an upper end edge of the fitted side portion. The annular hanging part which hangs outward so as to surround the opening edge of the main body container between the fitting side part and the outer peripheral edge of the flange is formed, any one of claims 1 to 4 characterized by the above-mentioned. Insulation container lid structure. 6. The body container according to claim 5, wherein the top surface of the opening edge is formed by a band-shaped flat surface having a predetermined width, and the outer flange of the inner lid is placed on the flat surface. The lid structure of the heat retention container as described. 7. The lid structure according to claim 4, wherein an outer peripheral end of the outer lid is welded to the upper surface of the outer flange formed on the inner lid over the entire circumference. 8. The outer lid has a side that rises above the inner lid, an outer flange is formed at a base end edge of the rising side, and an outer flange of the outer lid and an outer flange of the inner lid. The lid structure according to claim 7, wherein the flange is overlapped with the outer flange of the inner lid and the outer peripheral end of the outer flange of the outer lid is welded over the entire circumference. 9. A lower end of an annular hanging portion of the inner lid is lowered to a position lower than a lower surface formed at a lowermost part of a bottom portion of the inner lid fitted in the main body container. 5. The lid structure of the heat retaining container according to 5. 10. The method according to claim 1, wherein an inclined portion is formed on the bottom rear surface of the inner lid so as to gradually decrease from four sides of the outer portion toward the center. Insulation container lid structure. 11. An annular groove having a predetermined width is formed at the center of the upper surface of the outer lid, and radial grooves communicating with the annular groove on the same plane and reaching the outer end are formed at a plurality of locations around the annular groove. The lid structure of the heat retaining container according to any one of claims 1 to 10, wherein the lid structure is formed.