JP3201073U - Portable container - Google Patents

Abstract

[PROBLEMS] To place a heat insulating or cold insulating agent on a box-shaped upper lid body having an open upper surface, so that even if the heat insulating agent or the cold insulating agent leaks out, it does not enter the container main body, and there is no possibility of fouling foods inside. A portable container is provided. A portable container (1) includes a container body (2) having an upper surface opened and an upper lid (3). The upper lid 3 has a box shape with an upper surface opened, and includes an upper lid body 31 fitted inside the upper surface opening of the container body 2 and a top plate 35 that closes the opening of the upper lid body 31. The heat insulating or cold insulating agent 4 is sealed in the storage portion 32 between the upper lid body 31 and the top plate 35. There is a first joint surface formed at a position outside the upper edge portion 21 of the container body 2 at the peripheral edge portion of the opening of the upper lid main body 31 and a second joint surface formed at the peripheral edge of the top plate 35. And a seam welded in a state where these joint surfaces are overlapped. [Selection] Figure 2

Description

  The present invention relates to a portable container in which a heat retaining or cooling agent is built in an upper lid.

  2. Description of the Related Art Conventionally, a portable container used as a lunch box having a cold insulation function or a heat insulation function is known. In these portable containers, for example, as shown in Patent Document 1, a cold insulating agent is disposed inside the upper lid. In that case, the bottom of the top lid is composed of a single flat bottom plate, a cold insulation agent is placed on the bottom plate, a box-type upper lid body having an open bottom surface is placed over the cold insulation agent, and the bottom plate and the upper lid body are covered. The lower edge is sealed with adhesive or fitting.

Utility Model Registration No. 3112723

  However, in a conventional container in which the bottom plate of the upper lid and the lower edge of the upper lid body are sealed by adhesive or fitting, the internal cooling agent leaks from the joint portion between the bottom plate and the upper lid body with the container covered. There is a fear.

  In other words, if a liquid or gel refrigerant is contained in a resin bag, if the bag is originally scratched or damaged due to a collision during carrying, the refrigerant will leak from the bag. There is a possibility that it may ooze out from the gap between the bottom plate and the upper lid body to the lower surface of the upper lid. In addition, when the coolant is directly injected into the upper lid, the possibility that the coolant is exuded from the gap between the bottom plate and the upper lid body to the lower surface of the upper lid due to deformation or breakage of the upper lid when being carried is increased. .

  Thus, in the prior art, since the seam between the upper lid body and the bottom plate is exposed at the bottom of the upper lid, when the contents are put into the container and the upper lid is closed, the seam is located inside the container. There is a problem that the refrigerated chilling agent stains food in the container.

  In addition, when a cooling agent is placed on a flat bottom plate as in the prior art, the cooling agent is likely to be displaced until the next step of joining the upper lid body and the bottom plate. As a result, in the prior art, the cryogen is sandwiched between the top lid body and the bottom plate, and the bag of the cryogen is damaged, causing leakage of the cryogen, or the seam sealing is impaired by the sandwiched cryogen. There is a problem.

  Further, in the prior art, since the upper lid body and the bottom plate are sealed by heating or an adhesive, the assembly work of the upper lid takes time and labor, and there is a problem that it is not suitable for mass production by mechanization.

  Such a problem also occurs in a portable container in which a heat insulating agent is sealed inside the upper lid.

The present invention has been proposed in order to solve the above-described problems of the prior art. The purpose of the present invention is to prevent the inside food from entering the container body even if the heat insulating agent or the cold insulating agent leaks out. It is providing the portable container which does not have a possibility of fouling.
Another object of the present invention is to provide a portable container that can reliably join a seam portion between a bottom plate and a top plate and that does not cause leakage of a heat insulating agent or a cold insulating agent from the seam portion.

The portable container of the present invention has the following configuration.
(1) A container body whose upper surface is open.
(2) An upper lid having a box shape with an upper surface opened and having an upper lid body fitted inside the upper surface opening of the container body, and a top plate for closing the opening of the upper lid body.
(3) A heat insulating or cold insulating agent sealed in a space between the upper lid body and the top plate.
(4) A first joint surface formed at a position outside the upper edge of the container main body at the peripheral edge of the opening of the upper lid main body, and a second joint surface formed at the peripheral edge of the top plate And a seam welded in a state where the first and second joint surfaces are overlapped.

The portable container of the present invention preferably has the following configuration.
(1) The seam is welded by ultrasonic welding.
(2) The first joint surface and the second joint surface are formed in parallel with the surface of the upper lid.
(3) An engagement portion that protrudes outward from the peripheral edge of the upper lid body and contacts the upper edge of the opening of the container body from above, and the joint is more than the engagement portion. Located outside the container body.
(4) An inner lid of a material that is fitted into the inner wall surface of the upper edge of the main body and elastically deformed is disposed between the container main body and the upper lid.

  According to the present invention, since the seam is provided outside the upper edge portion of the container main body, even if the heat insulating agent or the cold insulating agent leaks out, it does not enter the container main body and stains food inside. A portable container without fear can be provided.

The perspective view which shows 1st Embodiment of this invention. The cross-sectional view which shows 1st Embodiment. It is a figure which shows the upper cover main body in 1st Embodiment, (a) is a top view, (b) is a front view, (c) is a longitudinal cross-sectional view, (d) is a side view. It is a figure which shows the top plate in 1st Embodiment, (a) is a top view, (b) is a front view, (c) is a longitudinal cross-sectional view, (d) is a side view. Sectional drawing which shows the manufacturing process of the upper cover of 1st Embodiment. The expanded sectional view of the junction part of the upper cover main body and top plate in 1st Embodiment. The cross-sectional view of the portable container which concerns on 2nd Embodiment.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Here, as an example of a portable container, a lunch box in which a cooling agent is built in the upper lid will be described.

[1. First Embodiment]
(1) Configuration A portable container 1 shown in FIGS. 1 and 2 includes a container main body 2, an upper lid 3, and a cooling agent 4.

  As shown in FIG. 2, the container body 2 is a box having an opening, and is made of resin or wood. The opening of the container body 2 is sealed by an upper lid 3 that is fitted inside the opening. The upper lid 3 is locked by the edge of the opening of the container body 2, that is, the upper edge 21 of the container body 2 so as not to enter the interior of the container body 2 more than a certain amount. Legs 22 are provided on the bottom surface of the container main body 2 at intervals so as to fit the width of a rubber band or the like.

  The upper lid 3 has substantially the same shape as the opening of the container main body 2 and has an upper lid main body 31 fitted into the opening of the container main body 2. As shown in FIG. 3, the upper lid main body 31 is a box-shaped member having an upper surface opened, and a recessed portion inside the upper cover body 31 serves as a storage portion 32 for the coolant 4. The upper lid body 31 is provided with an engaging portion 33 that protrudes outward from the periphery of the upper edge portion of the upper lid body 31 so that the upper lid body 31 does not enter the inside of the container body 2 more than a certain amount. In this embodiment, the engaging portion 33 is an L-shaped member whose tip is bent downward, and the tip bent downward is in contact with the upper edge portion 21 of the container body 2. A step portion is formed in the horizontal direction on the upper edge portion of the cooling agent storage portion 32, and the surface of the step portion serves as a first joining surface 34.

  The opening formed in the upper surface of the box-shaped upper lid body 31 is sealed by a substantially flat top plate 35. As shown in FIG. 4, the top plate 35 has a flange-like second joint surface 36 protruding in the horizontal direction around the periphery, and the second joint surface 36 overlaps the first joint surface 34. It is welded in the applied state.

(2) Action / Effect The portable container of this embodiment is used as follows.

  In order to manufacture the upper lid 3 of the portable container of the present embodiment, as shown in FIG. 5, an upper lid body 31, a cooling agent 4, a heat insulating sheet 41 and a top plate 35 are prepared. In this state, the cooling agent 4 and the heat insulating sheet 41 are stored in the storage portion 32 of the upper lid body 31 so as to overlap each other, and the top opening of the upper lid body 31 is closed by the top plate 35 (see FIG. 6A). At that time, the first joining surface 34 formed on the upper portion of the storage portion 32 and the second joining surface 36 formed around the top plate 35 are overlapped (see FIG. 6B), and from above and below. Welds while sandwiched between molds. In this case, ultrasonic welding is preferable as the welding method.

  The upper lid 3 formed in this way can be welded by applying pressure from above and below the upper lid 3 because the first joining surface 34 and the second joining surface 36 overlap in the horizontal direction. The surfaces can be reliably adhered to each other (see FIG. 6C). As a result, there is no possibility that the internal coolant 4 leaks from the joint between the upper lid body 31 and the top plate 35.

  In order to use the portable container of the present embodiment using the upper lid 3 manufactured as described above, first, contents such as food are stored in the container body 2. Thereafter, the upper lid 3 that has been kept warm or cold in advance is fitted into the opening of the container body 2, and the container body 2 and the upper lid 3 are brought into close contact with each other. At this time, since an engaging portion 33 projecting outward in an L shape is integrally formed on the upper edge portion of the upper lid body 31, in the state where the upper lid 3 is fitted into the container body 2, L The upper edge portion of the container body 2 is fitted into the gap between the letter-shaped engaging portion 33 and the side surface portion of the upper lid body 31, and sufficient sealing performance between the container body 2 and the upper lid 3 can be ensured. In addition, since the cold insulating agent 4 is formed integrally with the upper lid 3, it is possible to save the trouble of filling the upper lid 3 with the cold insulating agent 4.

  In particular, since the joint between the first joint surface 34 and the second joint surface 36 formed on the upper lid 3 is located outside the container body 2 with respect to the L-shaped engagement portion 33, Even if the internal cooling agent leaks out, it does not enter the inside of the container body 2 and contaminate foods.

  When taking out the contents, the upper lid 3 is opened and the contents are taken out from the opening of the container body 2. After use, the upper lid 3 can be repeatedly used as a portable container having high heat insulation or cold insulation by directly freezing the upper lid 3 in a freezer or keeping it warm with a microwave oven or the like.

  According to this embodiment, the following effects are exhibited.

(A) When the opening of the container main body 2 is sealed with the upper lid 3, the seam between the top plate 35 and the upper lid main body 31 is on the upper surface of the upper lid 3, that is, outside the container main body 2. Even if it leaks out, it does not enter the inside of the container main body 2, and there is no possibility that the food inside will be soiled.

(B) Since the first joint surface 34 and the second joint surface 36 are horizontally disposed around the upper lid body 31 and the top plate 35, it is possible to sandwich the two joint surfaces from above and below. As a result, when performing operations such as ultrasonic welding, the joint surface can be reliably welded by pressurizing the joint surface.

(C) Since the top plate 35 and the upper edge portion of the upper lid body 31 are welded by ultrasonic welding, an operation such as application of an adhesive is unnecessary, and the production of the upper lid 3 is simple.

(D) Since the upper lid main body 31 has a box shape having an upper surface opening, when the heat insulating or cold insulating agent 4 is disposed in the storage portion formed inside the upper lid main body 31, the periphery of the heat insulating or cold insulating agent 4 is surrounded by the upper lid. It is pressed by the main body 31 so that the heat insulation or the cold insulation agent 4 can be easily positioned.

(E) Since the engaging portion 33 of the upper lid 3 is superimposed on the upper edge portion 21 of the container main body 2, the L-shaped engaging portion 33 and the upper lid main body 31 in a state where the upper lid 3 is fitted into the container main body 2. The upper edge portion of the container body 2 is fitted into the gap between the side surfaces of the container body 2 and the container body 2 and the upper lid 3 can be sufficiently sealed.

(F) Since the leg portion 22 is provided on the bottom surface of the container main body 2 so as to fit the width of the rubber band or the like, when the rubber band is applied from the top of the container main body 2 covered with the upper lid 3, rubber is used. Since the band is fixed by a groove formed by the bottom surface of the container body 2 and the leg portion 22, the rubber band is difficult to come off even when being carried.

[2. Second Embodiment]
In the second embodiment, as shown in FIG. 7, an inner lid 5 that is fitted into the inner wall surface of the upper edge portion 21 of the container body 2 and elastically deforms is disposed between the container body 2 and the upper lid 3. It is what. The material of the inner lid 5 is an elastomer composed of a resin such as silicone, polyethylene, or urethane, and is elastically deformed. The inner lid 5 has a shape in which the bottom 51 is fitted into the opening of the container body 2 and closes the opening.

  Around the bottom 51 of the inner lid 5, a side plate 52 is integrally formed upward, and on the upper edge of the side plate 52, a flange 53 that protrudes outward in the horizontal direction is integrally formed. When the inner lid 5 is fitted into the container main body 2, the flange 53 is brought into close contact with the upper surface of the upper edge portion 21 of the container main body 2.

  In the inner lid 5, a concave portion formed by a side plate 52 and a bottom plate 53 that enter the bottom surface side of the container main body 2 from the upper edge portion 21 of the container main body 2 is formed over the entire surface of the inner lid 5, and this concave portion is elastically deformed. And since it fits in the inner wall surface of the container main body 2, it does not remove | deviate from the opening part of the container main body 2. FIG.

  According to this embodiment, the following effects are exhibited.

(A) The inner lid 5 molded from elastomer is brought into close contact with the inner wall surface of the container main body 2 and the side plate 52 of the inner lid 5 due to elastic deformation, so that the hermeticity is high and prevents leakage of the contents due to carrying. be able to. In particular, since the inner lid 5 is elastically deformed and fits into the inner wall surface of the container main body 2, it does not come off from the opening of the container main body 2.

(B) In this embodiment, it is not necessary to provide packing on the container main body 2 or the upper lid 4 by using the elastomer inner lid 5. Therefore, sufficient sealing performance can be secured even in a container that cannot be subjected to fine groove processing for fixing the packing, such as the wooden container body 2.

(C) The container main body 2 and the inner lid 5 are formed not only by the inner wall surface of the container main body 2 and the side plate 52 of the inner lid 5 but also by the upper surface of the upper edge portion 21 of the container main body 2 and the lower surface of the flange 53 of the inner lid 5. Since it adheres in two places, sealing performance improves more.

(D) Since the side plate 52 of the inner lid 5 is sandwiched between the inner wall surface of the container body 2 and the outer wall surface of the upper lid body 31 of the upper lid 3, the inner lid 5 is applied toward the inner wall surface of the container body 2. Therefore, the adhesion is improved and the upper lid 3 is difficult to come off from the inner lid 5.

(E) Since the engaging portion 33 of the upper lid 3 is superimposed on the upper surface of the flange 53 of the inner lid 5, the flange 53 of the inner lid 5 is pressurized by the engaging portion 33 of the upper lid 3, The upper surface of the edge portion 21 and the flange 53 of the inner lid 5 are in close contact with each other, and the container body 2 and the inner lid 5 are located at two locations on the inner wall surface of the container body 2 and the upper surface of the upper edge portion 21 of the container body 2. Since it adheres tightly, the sealing performance is further improved.

[3. Other Embodiments]
The present invention is not limited to the above-described embodiments, and includes other embodiments as follows.

(1) The shape of the container is not limited to a rectangle, and may be a square, a polygon, a circle, or an ellipse. The container may be made of resin, metal, or wood. When the container is made of wood, the wooden container body 2 has a higher heat insulating effect than the case of metal or resin, and has excellent cold insulation and heat insulation effects.

(2) Only a part of the engaging portion 33 may protrude from the side surface of the container body 2 so that the upper lid 3 can be easily removed from the container body 2, or the upper edge portion 21 of the container body 2 is partially recessed. May be.

(3) An airtight rubber may be attached between the L-shaped engaging portion 33 of the upper lid 3 and the side surface portion of the upper lid main body 31 or the upper edge of the container main body 2. The engaging portion 33 may not be L-shaped in cross section but may be a plate-like member that extends in the horizontal direction.

(4) The contents of the heat retaining or cooling agent 4 may be liquid or gel. The heat-retaining or cold-retaining agent 4 may be placed in the upper lid body 31 after the contents are sealed in the exterior film, or the contents may be directly injected into the upper lid body 31.

(5) In the illustrated embodiment, a one-stage lunch box made up of the container body 2 and the upper lid 3 has been taken as an example, but a multi-stage lunch box made up of a plurality of container bodies 2 and one upper lid 3 may be used. good. In this case, the bottom of the container body 2 that overlaps with the upper lid 3 may be formed in the same shape.

DESCRIPTION OF SYMBOLS 1 ... Portable container 2 ... Container main body 21 ... Upper edge part 22 ... Leg part 3 ... Upper lid 31 ... Upper lid main body 32 ... Storage part 33 ... Engagement part 34 ... 1st joining surface 35 ... Top plate 36 ... 2nd Bonding surface 4 ... Cold insulating agent 41 ... Insulating sheet 5 ... Inner lid 51 ... Bottom 52 ... Side plate 53 ... Flange

Claims (5)

A container body with an open top;
An upper lid body that is box-shaped with an upper surface open and is fitted inside the upper surface opening of the container body; and an upper lid that includes a top plate that closes the opening of the upper lid body;
A heat insulating or cold insulating agent sealed in a space between the upper lid body of the upper lid and the top plate;
A first joint surface formed at a position outside the upper edge of the container body at a peripheral edge of the opening of the upper lid body, a second joint surface formed at the periphery of the top plate, A portable container having a seam welded in a state where the first and second joining surfaces are overlapped.   The portable container according to claim 1, wherein a joint between the upper lid body and the top plate is welded by ultrasonic welding.   The portable container according to claim 1 or 2, wherein the first joint surface and the second joint surface are formed in parallel with the surface of the upper lid.   An engagement portion that protrudes outward from the periphery of the upper lid main body and contacts the upper edge of the opening of the container main body from above, and the seam is closer to the container main body than the engagement portion. The portable container according to any one of claims 1 to 3, which is located at an outer position.   The mobile phone according to any one of claims 1 to 4, wherein an intermediate lid that is fitted into an inner wall surface of an upper edge portion of the container main body and elastically deformed is disposed between the container main body and the upper lid. Container.

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