JPH0595809U - Bento container - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a lunch box container which prevents the dew condensation water due to the water vapor adhering to the inside of the lid body from splashing on food during heating and cooling in a microwave oven. A box lunch container having a polygonal container body (10) having a storage part and a dome-shaped lid (20) for closing the container, the storage part of the container body (10). Water retention grooves (15a, 15b) are formed on the periphery surrounding (11), and the water retention grooves are rounded corners (13) at the four corners as wide water retention grooves (15a), and the straight part is narrow. As the water retention groove (15b), the lower end (24) of the inner surface of the dome-shaped lid body (20) is located outside the wide water retention groove (15a) of the container body (10) (16) and fitted. A bento container.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a bento container which is composed of a container body and a dome-shaped lid and is circulated while being heated by a microwave oven.

[0002]

[Prior Art]

 Conventionally, when a lunch box is constructed with partition ribs and the ceiling of the container body that is divided into multiple compartments is closed by a flat or hilly lid, this occurs when these lunch containers are heated in a microwave oven. There are many known bento containers using a lid provided with a vent or a gap for letting out water vapor.

For example, as shown in FIG. 4, it is composed of a container body (30) and a dome-shaped lid body (31). With the lid body (31) attached to the container body (30), When the contents stored in the container are heated in the microwave oven by forming a gap (not shown) between the inside and outside of the container between the lid and the lid, vapor generated from the contents is discharged to the outside of the container. A food packaging container configured to do so has been proposed in Japanese Utility Model Publication No. 1-158583.

In addition to the bento container, a plastic tray having a flowing groove designed for discharging condensed water is widely used. For example, in a tray that cools, displays, and transports bread, confectionery, prepared foods, fruits, frozen foods, etc., by keeping the cold, dew condensation occurs and wets the stored items. It is known from Japanese Utility Model Publication No. 57-30886 as a container tank (40) having a water flow groove (41) for performing the operation. However, the above is a relatively large tray such as a container tank, and since the width of the water flow channel (41) can be set sufficiently, the tension of water is weak and the flow can be easily drained in the channel. (See FIG. 5).

[0005]

[Problems to be Solved by the Invention] However, as shown in FIG. 4, when a lid-shaped (31) food container having a hilly shape is heated in a microwave oven or cooled after heating, dew condensation water ( (P) adheres to the inner surface of the lid (31), and this condensed water (P) flows down the curved slope inside the lid (31) and puts the food in the container body (30) (indicated by the broken arrow). It will enter the compartment (32) or the food itself.

Although the above problem can be solved by providing a flowing water groove (41) on the container body (see FIG. 5), it is provided on the periphery of a lunch box container having a relatively small size. The groove width is about 1 to 2 mm, and even if condensed water (P) attached to the inside of the lid flows along a curved slope and collects in a narrow groove, it stays at that location due to tension and does not flow to the surrounding area, and excess water accumulates. It overflows (even if less than the volume of the entire groove) and enters the food storage section of the container body (not shown).

[0007]

[Means for Solving the Problems]

 Therefore, the present invention is intended to prevent the dew condensation water (P) due to the steam adhering to the inner surface side of the lid from being applied to the food when the lunch container is heated and cooled in the microwave oven. As shown in FIGS. 1 and 2, in a bento container comprising a polygonal container body (10) having a storage portion and a dome-shaped lid (20) for closing the container, the container body ( Water retention grooves (15a, 15b) are formed in the peripheral edge surrounding the storage part of (10), and the water retention grooves (15a, 15b) are inside at the four corners of the container body (10) which are rounded corners (13). A container body (10) having a wide water retention groove (15a) in which the radius of curvature R1 of 17) is made smaller than the radius of curvature R2 of the outside (16), and a dome-shaped lid body having curvatures toward the four corners ( 20) and a vent hole (21) is provided in the central part of the four sides of the dome-shaped lid body (20), and the vent container (21) is shown in FIG. As shown in, the lower end (24) of the inner surface of the corner portion (25) of the lid body (20) is the outer side of the wide water retention groove (15a) at the four corners of the container body (10) that is the rounded corner (13). It is a bento container which is located at 16) and is fitted so that the attached dew condensation water (P) flows and collects in the wide water retention groove (15a).

As shown in FIG. 1, the bento container of the present invention has water retaining grooves (15a, 15b) at the entire periphery between the flange (12) of the container body (10) and the food storage unit (11). This water retaining groove has a constant depth and the groove width is as narrow as possible (about 2 mm or less) except near the rounded corners (13), and is formed so as to surround all the storage parts (11). It was done. Further, the water retention grooves (15a) at the four corners, which are rounded corners (13) of the container body (10), have a radius of curvature R1 on the inner side (17) smaller than the radius of curvature R2 on the outer side (16), and (15a) is made wider, and the water retention groove (15b) in the straight line portion of the peripheral edge is made thinner, and the transition is made smooth by communicating with the wide water retention groove (15a).

As shown in FIG. 2B, the lid 20 of the bento container according to the present invention has a dome shape as a whole and has curvature toward the four corners 25. (4) is provided with a vent hole (21) at the center of each of the four sides to allow water vapor generated during heating to escape.

When the above-mentioned lid body (20) is fitted to the container body (10), as shown in a sectional view taken along the line AA of FIG. 3, the inner surface lower end of the four corners of the dome-shaped lid body (20) ( Fitted so that it is located outside (16) of the wide water retention groove (15a) formed at the four corners (13) of the container body (10) with rounded corners (13). Condensation water (P) adhering to the inner surface of the lid (20) is stored on the lower end (24) of the inner surface of the four corners of the lid (20) when the prepared food is stored and heated in a microwave oven or cooled. It flows in the opposite direction (indicated by the broken line arrow) and is collected in the wide water retention groove (15a) and stored in the storage section (11). In addition, if excessive dew condensation water accumulates in the wide water retention groove (15a), it flows into the narrow water retention groove (15b) in the straight part that communicates by capillary development, and sufficient water retention capacity can be secured. It does not overflow from the groove (15a, 15b).

[0011]

[Action]

 The present invention has a dome-shaped lid (20) for collecting and dewing condensed water (P) due to steam during heating and cooling toward the corners (25) of the four corners, and a water retention recess for receiving the condensed water (P). A lunch box container comprising a container body (10) having grooves (15a, 15b) formed therein. As shown in FIG. 3, the lower end (24) of the inner surface of the lid body (20) is the container body (10). It fits on the inner surface of the lid (20) during heating and cooling by fitting it so that it is located on the outside (16) of the wide water retention groove (15a) at the four corners with rounded corners (13). The condensed water (P) collected collects in the direction of the four corners (25) having the curvature of the lid body (20) and flows down to the lower end (24) of the inner surface to form a wide width formed in the four rounded corners of the peripheral edge of the container body (10). If the condensed water that flows into the water retention groove (15a) gathers in excess, it will flow into the narrow water retention groove (15b) in the straight line part that communicates. The dew condensation water that has flowed into the narrow water retention groove (15b) does not overflow due to the water tension, and thus does not enter the food storage section (11).

[0012]

【Example】

 An embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a plan view of a container body in a lunch box container having a plurality of storage parts and a water retaining groove formed on the entire periphery according to an embodiment of the present invention. 2A is a plan view of a dome-shaped lid that closes the container, and FIG. 2B is a side view of the lid having a vent hole.

As shown in FIGS. 1 and 2, a sheet material such as vinyl chloride resin or polypropylene resin is used as the base material of the container body (10) and the lid body (20) in the lunch container of the present invention. It is preferable that the sheet is formed by vacuum forming or pressure forming, so-called sheet forming, and the thickness is about 0.2 mm to 0.3 mm, which is thin and lightweight.

As shown in FIG. 1, the container body (10) is formed by sheet molding using a colored polypropylene resin. For example, a plurality of compartments (11) are provided and A straight water retaining groove (15b) with a depth of 1.5 mm to 2.0 mm and a width of 1.5 mm to 2.0 mm should be surrounded by the flange (12) so as to surround all the storage parts (11). It was formed. Although a plurality of compartments (11) are provided in the present embodiment, the container body may be a single compartment, which can be appropriately selected. The four corners of the container body (10) have rounded corners (13), and the water retention grooves (15a) at the four corners have an inner radius of curvature R1 smaller than the outer radius of curvature R2 and a wide radius only near the corners. It is connected to a narrow water retention groove (15b) provided as a straight line. The measured values in this example were R1 = 4.0 mm and R2 = 9.0 mm, and the inside (17) with rounded corners was set to 20 mmR and the outside (16) was set to 15 mmR.

On the other hand, as shown in FIGS. 2 (a) and 2 (b), the lid body (20) has a dome shape, and the ceiling portion (22) is substantially flat, and the curvature is toward the corners (25) of the four corners. This is also to prevent the container from bursting due to heating by providing (a large slope) and providing a vent hole (21) at the center of the four sides to release the steam generated during heating. .

Further, when the lid body (20) is fitted to the container body (10), as shown in FIG. 3, the inner surface lower end of the corner four corners (25) of the dome-shaped lid body (20). (24) is configured so as to be located on the outer side (16) of the wide water retaining groove (15a) at the four corners of the container body (10), which are rounded corners (13). For example, dew water (P) due to water vapor that adheres to the inner surface of the lid when the rice (or side dish) is stored in the storage section (11) of the container body and heated or cooled in a microwave oven, the lid (20) It is designed so that it flows down toward the lower end (24) of the inner surface of the four corners (25) and collects in the wide water retention groove (15a), and never enters the storage part (11). It In addition, if excessive dew condensation water accumulates in the water retention groove (15a), water will flow into the straight narrow water retention groove (15b) communicating with each other due to a capillary phenomenon.

[0017]

[Effect of the device]

 The present invention is a lunch box having a structure in which the inner lower end of a dome-shaped lid is located outside the water retaining groove formed on the peripheral edge between the flange and the container so as to surround the entire storage portion of the container body. When heating and cooling the container, it is possible to reliably guide the condensed water adhering to the inner surface of the lid to the wide water retention grooves formed at the four rounded corners of the container body. It is a lunch container that can reliably receive the dew condensation water that flows in from the lid in the water retention groove. In addition, the water retention groove is made narrower at the straight parts other than the vicinity of the rounded corners of the four corners to enclose all the storage parts, so there is no need to provide an extra space around the container body, and a wide water retention groove can be created. The accumulated water flows through the entire circumference due to the capillary phenomenon, so that a sufficient capacity can be secured and it does not overflow.

[Brief description of drawings]

FIG. 1 is a plan view of a container body in a lunch box container having a plurality of compartments and a water retaining groove formed in an inner peripheral edge according to an embodiment of the present invention.

FIG. 2A is a plan view of a dome-shaped lid that closes the container body. (B) It is a side view of the lid body same as the above.

FIG. 3 is a cross-sectional view taken along the line AA of the bento container of the present invention.

FIG. 4 is a partial cross-sectional view showing an example of a conventional lunch container having a dome-shaped lid.

FIG. 5 is a partial explanatory view showing an example of a water flowing groove.

[Explanation of symbols]

 10 ... Container main body 11 ... Storage part 12 ... Container flange 13 ... Four corners rounded part 15a ... Wide water retention groove 15b ... Narrow water retention groove 16 ... Outside 17 ... Inside 20 ... Lid 21 ... Vent hole 22 ... Ceiling part 23 ... Knob 24 ... Inner surface lower end of lid 25 ... Corners of four corners 30 ... Container 31 ... Lid body 32 ... Compartment P ... Condensate water

Claims (1)

[Scope of utility model registration request] 1. A lunch box container comprising a polygonal container main body having a storage part and a dome-shaped lid for closing the container, wherein a water retaining groove is formed at a peripheral edge surrounding the storage part of the container main body. At the four corners of the container body where the water retention groove has rounded corners, the container body having a wide water retention groove formed by making the inner radius of curvature smaller than the outer radius of curvature and the curvature toward the corners of the four corners. A lunch box container having a dome-shaped lid body having a vent hole provided at the center of the four sides of the dome-shaped lid body, the lower end of the inner surface of the corner portion of the lid body being a corner of the container body. A bento container characterized by being fitted and positioned outside a wide water retaining groove having four rounded corners.