JP3212827U - Insulating lunch box - Google Patents

Abstract

The present invention provides a heat-insulating lunch box excellent in heat retaining properties and cold retaining properties. A container body 1 and a lid body 2 that closes an upper opening of the container body 1 are formed by inner and outer double walls 1a and 1b that define a vacuum heat insulating container chamber S1. The vacuum heat insulating container chamber S1 is formed through the bottom portion 4, the upward circumferential side portion 5, and the upper end opening edge portion 6, and the lid body 2 has an inner and outer double wall 2a that defines the vacuum heat insulating lid chamber S2. 2b, the vacuum heat insulation lid chamber S2 is formed through the entire lid portion 12 and the downward circumferential side portion 13, and the downward circumferential side portion 13 of the lid body 2 provided with the vacuum thermal insulation lid chamber S2 is vacuumed. By vacuum-fitting the upper end opening edge 6 of the container main body 1 having the heat insulating container chamber S1, a vacuum heat insulating structure in the fitting portion is secured. [Selection] Figure 4

Description

[Technical Field] The present invention relates to a heat-insulating lunch box excellent in heat insulation and cold insulation.

According to the following patent document, the applicant of the present invention has a container body as a vacuum container formed by inner and outer double walls that define a vacuum heat insulating container chamber, and a heat insulating lunch box configured by a lid that closes the upper opening of the container body. Has proposed.

JP 2007-236593 A Japanese Patent No. 3544531 Japanese Patent No. 5165074

The conventional heat-insulating lunch box mainly ensures heat insulation and cold insulation by a container body as a vacuum container. And in order to prevent a heat retention and a cold retention fall, the cover body is filled with the heat insulating material as a thick plug body formed with the synthetic resin.

Thereby, hot food materials, such as warm cooked rice, can maintain a heat retention state, and conversely, cold cold food materials have an advantage of being able to maintain a cold insulation state.

However, since the heat of the foodstuff accommodated in the container main body is radiated through the lid, it is difficult to keep the heat and cold for a long time. The heat insulating property of the lid depends on the filled heat insulating material and does not completely cut off heat, so for example, if the difference between the internal temperature of the container body and the outside air temperature is large, There is a problem that the effective time for maintaining the temperature state is shortened.

By the way, it is considered that such a problem can be solved if not only the container body is formed of a vacuum container but also the lid is formed of a vacuum stopper having a vacuum heat insulating chamber.

However, even in that case, since heat dissipation or heat conduction is possible from between the joint portions of the container body and the lid, the effective time for heat insulation can be extended to some extent, but it is sufficiently satisfactory. It is difficult to enable an effective time.

The present invention provides a heat-insulating lunch box container that solves the above-mentioned problems, and as a means thereof, a container body having a bottom portion, an upward circumferential side portion, and an upper end opening edge, and the container body The container body is formed of an inner and outer double wall that defines a vacuum heat insulating container chamber, and the vacuum heat insulating container chamber is defined as the bottom portion. And the upper peripheral side and the entire upper opening edge, and the lid is formed by an inner / outer double wall defining a vacuum heat insulation lid chamber, and the vacuum heat insulation lid chamber is formed by the lid portion. And the whole of the downward peripheral side portion is formed, and the downward peripheral side portion of the lid body is externally fitted to the upper end opening edge of the container body.

An upper end opening edge of the container body is provided with an annular standing portion formed thinly from an inner circumferential side of a thick annular receiving portion, and a downward circumferential side portion of the lid body is externally fitted to the annular standing portion. It is preferable to configure so as to.

In a preferred embodiment, the container main body forms a lower chamber and an upper chamber in an internal space surrounded by the bottom portion and the upward peripheral side portion, and stores the small container in the upper chamber. A small container body provided with an outward flange on the opening edge, and a sealing lid for sealing the upper opening of the small container body. The small container is housed in the upper chamber, and the flange is disposed through an elastic packing. While mounting on the said annular standing wall, the opening edge part of the said small container is airtightly inserted in the said annular standing wall.

At this time, a closure lock arm that is rotatable around the horizontal axis is provided on the outer surface of the upward peripheral side portion of the container body, and the closure lock arm is pressed by raising the closure lock arm upright. Preferably, the lid is configured to press the lid downward by a portion, the sealing lid of the small container includes a peripheral wall standing on a peripheral edge, and a horizontal plate wall extending outward from an upper end of the peripheral wall, The peripheral wall is fitted and sealed in the upper opening of the small container body, and the horizontal plate wall is configured to overlap the upper surface of the flange of the small container body, and the lid body is positioned inside the downward peripheral side portion. A concave portion is formed on the lower surface of the lid portion, and the horizontal plate wall is received in contact with the concave portion, and a downward pressing force received by the lid body by the lid lock arm is transmitted to the horizontal plate wall by the concave portion. Configure to It is preferable.

According to the present invention, there is an effect that it is possible to provide a heat-insulating lunch box capable of maintaining heat insulation / cooling for a long time.

It is a perspective view which shows the state which closed the upper part of the container main body with the cover body, and was locked with the lid lock arm regarding 1st Embodiment of this invention. It is a perspective view which shows a container main body, a small container, and a cover body in an exploded state. It is a longitudinal cross-sectional view which shows the state closed with the cover body while accommodating a small container in a container main body. It is a longitudinal cross-sectional view which shows the state which separated the cover body from the container main body. It is a longitudinal cross-sectional view which shows the state which covered the container main body with the cover body. The small container is shown, (A) is a longitudinal cross-sectional view which shows the state which separated the small container main body and the sealing lid, (B) is a longitudinal cross-sectional view which shows the state which sealed the small container main body with the sealing lid. It is a longitudinal cross-sectional view which shows the state which covered with the cover body in the state which accommodated the small container in the container main body, and was locked by the closing lock arm.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

The heat-insulating lunch box according to the present invention includes a container body 1, a lid 2 that closes an upper opening of the container body 1, and a small container 3 that is accommodated in the container body 1.

(Container body)
As shown in FIGS. 3 and 4, the container body 1 includes a bottom portion 4, an upward circumferential side portion 5, and an upper end opening edge portion 6, and is composed of an inner wall 1a and an outer wall 1b that define a vacuum heat insulating container chamber S1. It is formed by a heavy wall, and the vacuum heat insulating container chamber S <b> 1 is formed through the bottom portion 4, the upward circumferential side portion 5, and the upper end opening edge portion 6.

Such a container body 1 is formed by joining the inner wall 1a and the outer wall 1b made of stainless steel plates in a state where a space is formed between them, and sucking and discharging the air inside the space, thereby the vacuum heat insulating container chamber. S <b> 1 is formed, and the seat plate 7 is fixed to the bottom surface of the bottom portion 4.

As shown in FIG. 4, the container body 1 has a lower chamber 8 and an upper chamber 9 formed in an internal space surrounded by the bottom portion 4 and the upward peripheral side portion 5, and ribs that indicate the boundary line between the two chambers. 10 is provided around the inner wall 1a. The upper chamber 9 is formed by an internal space extending from the upward peripheral side portion 5 to the upper end opening edge portion 6, and can accommodate a small container as will be described later.

The upper end opening edge 6 of the container body 1 is provided with an annular standing portion 6b that is thinly formed from the inner peripheral side of the thick annular receiving portion 6a, and the vacuum heat insulating container chamber S1 is provided with the annular receiving portion 6a. And it is formed so as to reach the inside of the annular standing part 6b.

A pair of lid lock arms 11 (described later) are provided on the outer surface of the outer wall 1b so as to face the diameter direction of the upward peripheral side portion 5 and are located below the annular receiving portion 6a.

(Lid)
As shown in FIGS. 3 and 4, the lid body 2 includes a lid portion 12 that closes the upper opening of the container body 1, and a downward circumferential side portion 13 that is suspended from the outer peripheral edge of the lid portion 12. The vacuum insulation lid chamber S2 is formed by an inner / outer double wall composed of an inner wall 2a and an outer wall 2b, and the vacuum insulation lid chamber S2 is formed through the lid portion 12 and the entire lower circumferential side portion 13. ing.

Such a lid 2 is formed by joining the inner wall 2a and the outer wall 2b made of stainless steel in a state where a space is formed between them, and sucking and discharging the air inside the space, thereby the vacuum heat insulating lid chamber. S2 is formed, and a top coat 14 made of a film layer or a coating layer is provided on the upper surface of the lid 12.

As shown in FIG. 4, the lid portion 12 is positioned inside the downward circumferential side portion 13, and forms a recess 15 by recessing the inner wall 2 a upward, and the inner wall adjacent to the recess 15. An annular chamber 16 in which the vacuum heat insulating lid chamber S2 is partially thickened is formed by bending the inner peripheral portion of 2a into a downward convex shape.

The outer wall 2b forming the downward circumferential side portion 13 forms a top taper wall 17 by gradually descending and tilting the bent portion bent from the upper end toward the lid portion 12, and the top taper wall 17 Is provided around the entire circumference of the lid 2.

(The downward peripheral side of the lid and the top opening edge of the container body)
As shown in FIG. 5, when the container body 1 is covered with the lid body 2, the downward circumferential side portion 13 of the lid body 2 is externally fitted to the annular standing wall 6 b of the upper end opening edge 6 in the container body 1, The lower end edge of the side part 13 is mounted on the upper part of the annular receiving part 6a.

In this state, the combined width W1 of the annular standing wall 6b and the downward peripheral side portion 13 overlapping with the annular standing wall 6b is configured to be substantially equal to the width W2 of the annular receiving portion 6a. In addition, the said recessed part 15 is faced above the cyclic | annular standing wall 6b, and the said annular chamber 16 is arrange | positioned in the inner peripheral part of the cover body 2 adjacent to this recessed part 15. As shown in FIG.

(Small container)
As shown in FIG. 6A, the small container 3 is composed of an upper opening-shaped small container body 18 formed of a synthetic resin, and a sealing lid 19 that seals the upper opening of the small container body 18. Yes.

The small container body 18 includes an outward flange 20 at the upper opening edge, and an elastic packing 21 is attached to the lower side of the flange 20. The elastic packing 21 is formed of an elastomer into a ring shape having an L-shaped cross section, and includes a vertical wall 21 a that is elastically attached to the outer peripheral surface of the opening edge of the small container body 18 and a horizontal wall 21 b that is in close contact with the lower surface of the flange 20. .

The hermetic lid 19 includes a peripheral wall 23 that stands and intersects with the peripheral edge of the cover plate portion 22, and a horizontal plate wall 24 that extends outward from the upper end of the peripheral wall 23. In the case of the illustrated embodiment, a knob 25 that extends inwardly from the peripheral wall 23 extends from a part of the horizontal plate wall 24.

A ring-shaped seal packing 26 made of an elastomer is attached to the outer periphery of the peripheral wall 23.

Therefore, as shown in FIG. 6B, when the peripheral wall 23 of the sealing lid 19 is pushed into the upper opening edge of the small container body 18, the upper opening of the small container body 18 is sealed through the seal packing 26. In this state, the horizontal plate wall 24 of the sealing lid 19 is overlaid on the upper surface of the flange 20 of the small container body 18.

(Lid lock arm)
As shown in FIGS. 1 and 4, the lid lock arm 11 has two arms pivotally supported around a horizontal axis via a pivotal support bracket 27 fixed to the outer surface of the container body 1. The tip of the part is connected to a gate shape, and a pressure roller 28 is provided on the gate shape part.

With the lid 2 removed from the container body 1 and the upper part of the container body 1 being opened, the lid lock arm 11 is pivoted downward as shown in FIG. It is held. When the container body 1 is covered with the lid body 2 and the lid lock arm 11 is turned upright, the pressing roller 28 gets over the upper taper wall 17 of the lid body 2 as shown in FIGS. As shown by an arrow P in FIG. 7, the lid body 2 is fixedly locked in a state where the lid body 2 is pressed downward as shown in FIG.

(Function)
The heat-insulating lunch box configured as described above includes, for example, a container body 1 in a state in which freshly cooked rice is stored in the lower chamber 8 of the container body 1 and the small container 3 is stored in the upper chamber 9. Used by covering with 2. The small container 3 can contain sugar beet and the like, but since it is configured to be hermetically sealed by the sealing lid 19, miso soup and soup can also be accommodated. When the cooked rice or the like is stored in the lower chamber 8, attention can be drawn so that the cooked rice or the like does not reach the upper chamber 9 beyond the lower chamber 8 using the rib 10 as an index.

When the small container 3 is accommodated in the upper chamber 9 of the container body 1 in a state where the small container body 18 is sealed with the sealing lid 19, the vertical wall 21a of the elastic packing 20 is hermetically sealed to the annular standing wall 6b as shown in FIG. The horizontal wall 21b is placed on the upper surface of the annular standing wall 6b.

After the small container 3 is accommodated in the upper chamber 9 of the container body 1, when the upper opening of the container body 1 is covered with the lid body 2, the downward circumferential side portion 13 of the lid body 2 is exposed to the annular standing wall 6 b of the container body 1. It is fitted and the lower end edge of the downward circumferential side portion 13 faces the upper portion of the annular receiving portion 6a. In this state, the horizontal plate wall 24 of the sealing lid 19 in the small container 3 is received in the concave portion 15 of the lid body 2, and the concave bottom portion of the concave portion 15 is brought into contact with the upper surface of the horizontal plate wall 24.

Thereafter, when the lid lock arm 11 is erected and the pressing roller 28 is fitted to the upper surface tapered wall 17 of the lid body 2, a downward pressing force P is applied to the lid body 2 as described above, and the lid body 2 is applied. Fixed and locked in the lid state.

The pressing force P is transmitted from the recess 15 to the horizontal plate wall 24 and presses the horizontal plate wall 24 downward. The flange 20 of the small container body 18 is overlaid on the lower surface of the horizontal plate wall 24, and further, the lateral wall 21b of the elastic packing 21 is overlaid on the lower surface of the flange 20, so that the lateral wall 21b of the elastic packing 21 is annular. It is elastically contacted with the upper surface of the standing wall 6b.

As a result, the vertical wall 21a of the elastic packing 21 is elastically attached to the inner peripheral surface of the annular standing wall 6b between the small container 3 housed in the upper chamber 9 and the upper end opening edge 6 of the container body 1. 21b is elastically attached to the upper surface of the annular standing wall 6b with a pressing force P, thereby maintaining high airtightness and ensuring heat insulation from the outside air.

The internal space surrounded by the peripheral side portion 5 facing upward from the bottom 4 of the container main body 1 is secured with extremely high heat insulation by the vacuum heat insulating container chamber S1, and the upper region of the container main body 1 is the vacuum heat insulating cover chamber of the lid 2. An extremely high heat insulating property is secured by S2.

For example, when high-temperature ingredients such as miso soup are stored in the small container 3, heat is transmitted through the lid plate portion 22 of the sealing lid 19, but the upper region of the lid plate portion 22 is the vacuum heat insulating lid chamber of the lid portion 12. Since it is covered with S2 and is surrounded by the thick annular chamber 16 of the vacuum heat insulating lid chamber S2, heat radiation toward the outside is prevented.

And in the structure which uses both the container main body 1 and the cover body 2 as a vacuum heat insulation structure, there exists the biggest subject in the point to which an internal heat | fever is discharge | released from the fitting part of the container main body 1 and the cover body 2, As mentioned above. As described above, a wide annular receiving portion 6a having a width W2 of the vacuum heat insulating container chamber S1 formed in the upward peripheral side portion 5 is provided below the fitting portion, thereby enhancing the heat insulating effect. In addition, in the fitting portion, the downward peripheral side portion 13 with the vacuum heat insulating lid chamber S2 extended is externally fitted to the annular standing wall 6b with the vacuum heat insulating container chamber S1 extended, so that both are combined and wide. A wide vacuum heat insulation space having a width W1 is formed, thereby enhancing the heat insulation effect.

As a result, according to the present invention, it is possible to provide a heat-insulating lunch box container capable of maintaining heat insulation / cooling for a long time.

DESCRIPTION OF SYMBOLS 1 Container main body 1a Inner wall 1b Outer wall S1 Vacuum insulation container chamber 2 Lid 2a Inner wall 2b Outer wall S2 Vacuum insulation lid chamber 3 Small container 4 Bottom part 5 Upper peripheral side part 6 Upper opening edge part 6a Annular receiving part 6b Annular standing wall 7 Seat plate 8 Lower chamber 9 Upper chamber 10 Rib 11 Closure lock arm 12 Lid 13 Downward circumferential side 14 Top coat 15 Recess 16 Annular chamber 17 Upper surface taper wall 18 Small container body 19 Sealing lid 20 Flange 21 Elastic packing 21a Vertical wall 21b Horizontal wall 22 Cover plate portion 23 Peripheral wall 24 Horizontal plate wall 25 Knob piece 26 Seal packing 27 Shaft support bracket 28 Press roller

Claims (4)

Consists of a container body (1) having a bottom part, an upward circumferential side part and an upper end opening edge, a lid part closing the upper opening of the container body and a lid body (2) having a downward circumferential side part,
The container body (1) is formed by inner and outer double walls that define a vacuum heat insulating container chamber (S1), and the vacuum heat insulating container chamber includes the bottom (4), an upward circumferential side portion (5), and an upper end opening edge. Part (6) is formed throughout,
The lid (2) is formed by inner and outer double walls that define a vacuum heat insulation lid chamber (S2), and the vacuum heat insulation lid chamber is formed over the lid portion (12) and the downward circumferential side portion (13). Formed through,
A heat-insulating lunch container, wherein the downward peripheral side portion (13) of the lid body is externally fitted to the upper end opening edge portion (6) of the container body. The upper end opening edge portion (6) of the container body is provided with an annular standing wall (6b) formed thinly from the inner peripheral side of the annular receiving portion (6a) formed to be thick, and the downward peripheral side portion of the lid body The heat-insulating lunch box according to claim 1, characterized in that (13) is configured to be fitted on the annular standing wall (6b). The container body (1) forms a lower chamber (8) and an upper chamber (9) in an internal space surrounded by the bottom portion and an upward peripheral side portion, and stores a small container (3) in the upper chamber. ,
The small container (3) consists of a small container body (18) provided with an outward flange (20) on the upper opening edge, and a sealing lid (19) for sealing the upper opening of the small container body,
The small container (3) is accommodated in the upper chamber (9), and the flange (20) is placed on the annular standing wall (6) via the elastic packing (21), and the opening edge of the small container The heat-insulating lunch box according to claim 2, wherein a portion is hermetically fitted into the annular standing wall (6). Provided on the outer surface of the upward peripheral side portion (5) of the container body (1) is a closed lid lock arm (11) that can be rotated about a horizontal axis, It is configured to press the lid (2) downward by the pressing portion (28) at the tip of the arm,
The hermetic lid (19) of the small container (3) comprises a peripheral wall (23) standing up at the peripheral edge, and a horizontal plate wall (24) extending outward from the upper end of the peripheral wall,
The peripheral wall (23) is fitted and sealed in the upper opening of the small container body (18), and the horizontal plate wall (24) is overlaid on the upper surface of the flange (20) of the small container body,
The lid (2) is located inside the downward circumferential side portion (13) and has a concave portion (15) formed on the lower surface of the lid portion (12). The horizontal plate wall (24) is abutted against the concave portion. The downward pressing force (P) received by the lid by the lid lock arm (11) is transmitted to the horizontal plate wall (24) by the recess (15). The heat-insulating lunch box according to claim 3 characterized by things.

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