JPS6264753A - Vessel for heat insulation - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention (a) Industrial Application Field The present invention is applicable to thermoses, cooler boxes (portable cold boxes) used for camping, fishing, etc.
Relates to insulating or heat-retaining containers such as rooms.

(b) Conventional technology The most common forms of heat-insulating or heat-retaining containers are:
A glass bottle having two inner and outer walls whose inner surfaces are silver-plated is evacuated in the space between the inner and outer walls (regulations are known).

In addition, in recent years, containers with two inner and outer walls made of stainless steel plates have been put into practical use, and are widely used as heat-retaining containers with high impact resistance, mainly as portable heat-retaining water bottles.

Furthermore, The Dow Chemi061 comp
In U.S. Pat. No. 3,828,960 to fin7, one side of a hard plastic sheet is metallized with a metal such as silver, and a protective glass sheet is attached thereon to form the inner and outer second walls. A heat-retaining container has been proposed in which the space between the inner and outer walls is evacuated and the space is filled with a gas absorbing member to absorb residual gas.

On the other hand, in the case of cooler boxes used for fishing, camping, etc., and the cold chambers of refrigerated cars, there are those whose walls are simply made of a material with low conductivity, such as styrofoam or urethane foam.

(c) Problems to be solved by the present invention Among the conventional containers, first, the glass bottle container with a double wall evacuated has the best heat insulation or heat retention properties, but the strength of the glass itself is Although it is less likely to be damaged during normal use at home due to improvements in packaging and cushioning materials, it still has poor impact resistance and must be handled with care when camping, driving, etc. It was necessary.

However, the ones using stainless steel plates are l[]m and 15m.
Impact resistance has been dramatically improved to the extent that there is no risk of damage even when dropped from a height of It was difficult to use, and was generally limited to a right cylindrical shape, which could not meet the demands of users due to its shape, and was itself quite heavy.

Therefore, if you are walking with it hanging from your shoulder when you go hiking, for example, it will sway regardless of your walking movement and repeatedly and continuously hit your M bone and flank, causing a nuisance and causing you to lose your self-response and proboscis. Even when it was used, it was heavy, which was a problem for portable use.

Furthermore, although the heat-insulating container of U.S. Pat. This required specialized mechanical equipment. In addition, since the space is filled with a solid gas absorbing member, heat is conducted through the member, which significantly reduces the heat insulation or heat retention effect.

Therefore, in order to eliminate the drawbacks of the prior art as described above, the present invention creates two surfaces with a sheet having zero permeability and high reflectivity, and provides excellent heat insulation or heat retention. A heat-retaining product that has high impact resistance, can be formed into any size and shape, can change the container that can receive it depending on the amount of contents, and can change the external shape as required. Aim to obtain a container.

B) Means for Solving the Problems The structure of the present invention for solving the above problems will be explained with reference to FIGS. 1 to 6, which correspond to basic embodiments. The walls of the container for keeping the contents warm in an insulated state are spaced apart from each other, and a closed space (4
) and inner and outer sheets (1,2) of permeability "0" provided to form an inner and outer sheet (L2
) A number of cavities (5) provided within the closed space (4) between
and a core (6) having a cavity (5) of the core (6).
) is evacuated to create a vacuum state in the closed cavity (4).

(e) Function The heat-retaining container according to the present invention is intended to maintain the heat insulation properties between the inside and outside of the container by the above-mentioned means, and the wall of the container has an inner and outer surface having a permeability of "0" and which are spaced apart from each other. The enclosed space between the sheets is evacuated, and the spacing between the inner and outer sheets is maintained by a core that acts like a spacer. Therefore, when the closed space is brought into a vacuum state, the two sheets do not come close to each other or come into contact with each other, thereby reducing the vacuum state space to "0". Further, since the core has a large number of cavities, the volume of space that can be in a vacuum state is increased, thereby minimizing the amount of heat conduction inside the container that is transmitted through the intervening core.

In addition, the high reflectivity of the inner and outer sheets further prevents the heat retention ability from decreasing due to heat transfer due to heat convection or radiation.

Further, by forming each sheet and at least one of the core to have rigidity, a container with a fixed external shape is formed, and by forming each sheet and core to have flexibility, It transforms into a container of a size corresponding to the contents to be received, and when carried, for example, changes into an external shape that is larger than the location where the container is stored.

(F) Embodiment FIG. 1 is a diagram showing an embodiment of the present invention, in which an inner sheet 1 for bone-bonding the contents is arranged with a required spacing between it and the outer surface of the inner sheet 1. The opening 30 of the outer sheet 2 is continuous at the periphery of the opening 30 thereof, so that a closed space 4 is formed between the two sheets 1.2. The closed space 4 is provided with a core 6 having as many cavities 5 as possible while maintaining the spacing between the two sheets 1.2, and
The closed space 4 is maintained in a vacuum state.

The inner and outer sheets 1 and 2 are made of a sheet material with permeability "0", which is used for vacuum packaging of coffee beans and the like. More preferably, a sheet material (second
(see figure), or a sheet material (3rd examination 141il) in which a metal foil 9 of aluminum, tin, etc. is laminated on a transparent film 8 made of synthetic resin. At this time, the plated or vapor-deposited metal 7 or metal foil 9 is coated with another synthetic resin transparent film 10 such as Mylar (trademark) on at least its outer surface to prevent it from being peeled off or damaged by external factors.
It is preferable that the layers are laminated.

The core 6 provided in the closed space 4 has as many cavities 5 as possible and acts as a spacer to maintain the distance between the inner and outer sheets 1 and 2 under the vacuum condition of the closed space 4. , more preferably made of a material with poor thermal conductivity. As the =f series of members that can meet such requirements, there is "
NorCorθ (trademark). This is a sheet or panel formed from a thermoplastic resin such as 5BB@fat or polycarbonate so as to have a hollow internal structure in the shape of a fruit, a spider's web, or an ant's nest.

At this time, the cavity 5 provided within the core 6 is the closed space 4
The openings of the container should be formed so that they communicate with each other, so that when attempting to create a vacuum state, the air in all cavities 5 can be removed by performing one evacuation operation at any suitable location. 3. The inside of the closed space at the periphery has a screw thread 11 so that the inside of the container can be sealed with a container lid (not shown).
It is solid to provide a friction fit or to form a frictionally engaging feature (not shown). This solid portion 6α may be provided by preparing a separate part formed into a predetermined opening shape, but it is preferable to mold the opening peripheral portion with a solid shape when molding the core 6. It is convenient for the process.

The inner and outer sheets 1 and 2 can be made using a well-known vacuum packaging bag-making machine, and a well-known vacuum bag making machine can be used to arrange a core 6 on both sheets 1.21 m and to form a closed space 4 in a vacuum state. We decided to make a slight design change to the packaging machine.
I can hide. An example of the basic shape of the heat-retaining container formed in this way is shown in FIG.

The bonding surfaces of the sheets 1 and 2 and the core 6 are brought into close contact by creating a vacuum state in the space 5 of the core 6, and it is not necessary to apply adhesive means between the bonding surfaces. There's no need. However, in order to avoid the risk of mutual displacement due to distortion of the container itself or forces from the inside and outside of the container, it is preferable to heat-fuse them.

FIG. 5 is a view showing a heat-retaining container in the form of a cooler box according to another embodiment of the present invention, in which the walls of the box 12 are formed with a cored vacuum wall structure similar to that described above, and the lid 1 is
The third wall is also purchased in the same way. When the lid 15 is connected to the box 12 in a hinged manner, as shown in FIG. 14
This can be achieved by forming the core 6 so as not to include it therein.

Here, when forming a large-sized structure such as a cooler box or a storage compartment of a refrigerated tank, as shown in FIG. A core similar to the core 6 is attached with a sheet-like heat insulating member in a vacuum state with a sheet 1.2 and a core 6, and the hollow part of the wall is formed into a closed space, and there also has a large number of voids 15α. By providing 6α and creating a vacuum state, five layers of vacuum space are located around the container, and the insulation and heat retention characteristics of the container can be reliably maintained.

However, if the adhesion between the panel 15 and the sheet-like I+fr thermal member can be ensured, there is no need to provide the core 6α, and it is particularly preferable to leave the closed hollow body in a vacuum state. Insulating properties against heat conduction can be provided more reliably.

In each of the above-mentioned embodiments, there is no mention of the rigidity of the wall of the container composed of the inner and outer sheets and the core. The sheet has sufficient openability,
By imparting flexibility to the core, the container of the present invention deforms depending on the contents and the location of the container (see Figure 7).

(G) Effects of the Invention As described above, the present invention provides a core containing many cavities that function like spacers in the closed space between the sheet surfaces with a permeability of "0", and exhausts the air in the cavities. Since the walls of the container can be formed in a vacuum state, sufficient thermal insulation properties can be maintained.

In addition, each side sheet is formed from a synthetic resin film,
In addition, by forming the core in a shape such as a fruit-shaped synthetic resin, it is possible to form a heat-retaining container that is large in volume and highly resistant to injection, and is also suitable for water bottles, tabletop pots, cooler boxes, etc. It can be made into any shape, such as.

By applying metal vapor deposition or plating film or metal foil a/* film to the inner and outer sheets,
Each face sheet can have high reflectivity, thereby further improving the heat insulating properties.

In addition, by forming each face sheet and core that form the walls of the container from a flexible material, the shape of the container itself can be deformed, and the content of the container can be changed depending on the violet content of the container. Therefore, the container can be stored anywhere, and since the container is always filled with the contents, the heat retaining properties of the container can be further improved.

In addition, when manufacturing containers, we use the well-known automatic vacuum packaging (
Since it can be easily and continuously produced by making slight design changes to mechanical equipment, it is suitable for mass production, and as a result, it is possible to provide an inexpensive heat-retaining container.

Furthermore, by forming a wall consisting of 411 layers of inner and outer sheets and a core into a flat plate shape, it can be applied as a heat insulating board, and by imparting flexibility, it can be applied as a heat insulating sheet. For example, it can be used as a heat insulating sheet. It can be used in a wide range of applications, such as insulating walls of refrigerators and refrigerated warehouses, and as constituent materials for tents and camping sheets.

[Brief explanation of drawings]

FIG. 1 is a partially exploded front view of a heat-retaining container according to the present invention. 2 and 6 are enlarged partial cross-sectional views showing the configuration of the wall of the container shown in FIG. 1, respectively. FIG. 4 is a partially exploded perspective view showing an example of a heat-retaining container produced by the automatic vacuum packaging machine according to the present invention. FIG. 5 is a partially exploded perspective view showing a cooler box-shaped heat insulating container according to the present invention. Figure 6 is the 5th
FIG. 2 is an enlarged partial cross-sectional view showing a hinge-acting portion of the container shown in the figure. FIG. 7 is a perspective view showing an example of a heat-retaining container having a flexible wall. 1... Inner sheet 2... Outer sheet 4...
・Closed space 5...Cavity 6...Core patent Applicant: IKII Komatsu Same as above
Takashi Kataoka, agent and patent attorney Sumi Shimosaka
(No change in content) 2nd Anniversary 3rd Amendment (Method) 1972 Name of heat-retaining container Aikii Ai Komatsu (11 people) 4. Representative 〒105 6. Subject of amendment: -
,. ``Document proving authority of agency, and ``Drawings (all drawings) 47,
Contents of M (1) There is no change in the content as shown in the engraving of the drawing originally attached to the application and the attached sheet) (2) The document proving the power of attorney is amended as shown in the attached sheet.

Claims (5)

[Claims] (1) A container for keeping the contents warm in an insulated state, the walls of the container being a pair of permeable "0" ” and a core (6) having a number of cavities (5) provided in a closed space (4) between the inner and outer sheets (1, 2). ,core(
6) A heat-retaining container characterized in that the air in the cavity (5) is evacuated to create a vacuum state in the closed space (4). (2) A container according to claim 1, characterized in that the inner and outer sheets (1, 2) are made of a highly reflective sheet material. (3) The occupied volume ratio of the core (6) to the closed space (4) is small enough to at least maintain the closed space (4) in a vacuum state, and each cavity (5) of the core (6)
3. The container according to claim 1 or 2, characterized in that the containers (1) and (2) are formed in a single cavity shape that communicates with each other. (4) A patent characterized in that at least one of the inner sheet (1), outer sheet (2), and core (6) constituting the wall of the container has sufficient rigidity to hold the predetermined shape of the container. A container according to claim 1, 2 or 3. (5) The wall of the container consisting of the inner sheet (1), the outer sheet (2) and the core (6) is flexible, as set forth in claim 1, 2 or 3. container.