JP2022103638A - Heat resistant packing container - Google Patents

Abstract

To provide a heat-resistant packaging container which can efficiently discharge steam inside the container to the outside even if the containers are stacked.SOLUTION: In a heat-resistant packaging container 300 consisting of a lid body 100 having a top surface 110 and a container body 200 having a bottom surface 210, four or more outward steam vent valves 170 with openings 175, or four or more steam vent holes 180A with openings 175A are provided along the outer circumference 111 of the top surface 110 of the lid body 100.SELECTED DRAWING: Figure 1

Description

Application for application of Article 30, Paragraph 2 of the Patent Law Sale date: November 25, 2020-Sales location: Favorable from Sukairaku Holdings Co., Ltd. (each store in Japan) Sales date: December 15, 2020-Sales Place: Sukairaku Holdings Gusto Co., Ltd. (stores all over Japan)

The present invention relates to a heat-resistant packaging container including a container body and a lid.

Conventionally, heat-resistant packaging containers including a container body for storing heated foods such as prepared foods and rice and a lid body that can be fitted to the container body have been used in supermarkets, convenience stores, and the like.

For example, the heat-resistant packaging container described in Patent Document 1 is a heat-resistant packaging container provided with a container body and a lid, and is a lid for discharging steam generated from heated food to the outside of the container. A valve is provided on the top surface of the. However, when the containers are stacked, the flow of discharged steam is blocked by the bottom surface of the container body of the stacked upper heat-resistant packaging container, and the steam can be discharged to the outside well. There was a problem that it could not be done.

Patent No. 6276955

Therefore, in view of the above problems, the present invention provides a heat-resistant packaging container capable of efficiently discharging the vapor in the container to the outside even if the containers are stacked.

In order to solve the above problems, the heat-resistant packaging container according to claim 1 of the present invention is a heat-resistant packaging container including a lid having a top surface and a container body having a bottom surface. Along the outer periphery of the top surface of the lid, four or more outward steam vent valves having openings or four or more steam vent holes having openings are provided. do

According to the above characteristics, by providing four or more steam vent valves or steam vent holes, steam can be efficiently discharged to the outside, and the steam vent valve or steam vent holes are the top surface of the lid. Since it is located along the outer circumference of the steamer, it is difficult to be blocked by the placed container.

Further, the heat-resistant packaging container according to claim 2 of the present invention is a heat-resistant packaging container including a lid having a top surface and a container body having a bottom surface, and the top surface of the lid. Is provided with an outward steam vent valve having an opening or a steam vent hole having an opening, and when the container body is stacked on the lid, the steam vent valve or the said. A non-contact portion that does not come into contact with the container body is provided in all or a part of the steam vent holes, and the space created above the non-contact portion communicates with the outside of the container body. ..

According to the above characteristics, the space formed on the upper side of all or part of the steam vent valve which is a non-contact part or all or part of the steam vent hole which is a non-contact part is stacked on the upper side and has heat resistance. Since it communicates to the outside of the container body of the packaging container, the steam in the lower heat-resistant packaging container is not blocked by the container body of the heat-resistant packaging container stacked on the upper side, and goes to the outside. It is effectively discharged toward. Further, since the steam is discharged toward the outside of the container body of the heat-resistant packaging container stacked on the upper side, water droplets or the like due to the steam are discharged on the surface of the container body of the heat-resistant packaging container stacked on the upper side. It does not adhere and the heat-resistant packaging container is easy to handle.

Further, the heat-resistant packaging container according to claim 3 of the present invention is characterized in that the opening is the non-contact portion.

According to the above characteristics, since the opening is a non-contact portion that does not come into contact with the container body of the heat-resistant packaging container stacked on the upper side, the steam discharged from the opening is stacked on the upper side. It is discharged more effectively toward the outside without being blocked by the container body of the heat-resistant packaging container.

Further, the heat-resistant packaging container according to claim 4 of the present invention is characterized in that a misalignment prevention portion is provided at least on either the top surface of the lid or the bottom surface of the container body.

According to the above characteristics, it is possible to prevent the heat-resistant packaging containers stacked on the upper side from shifting and blocking the steam vent valve or steam vent hole provided on the lid of the lower heat-resistant packaging container. can.

The heat-resistant packaging container of the present invention can efficiently discharge the steam in the container to the outside even if the containers are stacked.

It is a top view of the lid body which concerns on Embodiment 1 of this invention. (A) is a side view of the lid, and (b) is an end view of AA of FIG. 1 (a). (A) is a plan view of the container body covered by the lid body according to the first embodiment of the present invention, (b) is a side view of the container body, and (c) is a BB end view. (A) is a plan view of the heat-resistant packaging container according to the first embodiment of the present invention, and (b) is a side view of the heat-resistant packaging container. FIG. 4A is an end view taken along the line CC of FIG. 4A. It is a side view of the heat-resistant packaging container which was stacked. (A) is a plan view of the lower heat-resistant packaging container stacked in a stack, and (b) is a DD cross-sectional view showing the periphery of the steam vent valve in an enlarged manner. (A) is a plan view of the lower heat-resistant packaging container stacked in a stack, and FIG. 8 (b) is an enlarged sectional view taken along the line EE around the steam vent valve. It is a top view of the lid body which concerns on Embodiment 2 of this invention. (A) is a side view of the lid, and (b) is an FF end view of FIG. (A) is a plan view of the container body covered by the lid body according to the second embodiment of the present invention, (b) is a side view of the container body, and (c) is a GG end view. It is a side view of the heat-resistant packaging container which was stacked. (A) is a plan view of the lower heat-resistant packaging container stacked in a stack, and (b) is an enlarged cross-sectional view taken along the line around the steam vent hole.

100 Lid 110 Top surface 111 Outer circumference 170 Steam vent valve 175 Opening 175A Opening 180A Steam vent hole 200 Container body 210 Bottom surface 300 Heat-resistant packaging container

Hereinafter, each embodiment of the present invention will be described with reference to the drawings. In addition, in this specification, "upper" means an upward direction in a vertical direction when it is placed on a horizontal plane with the opening surface of the container body of the heat-resistant packaging container facing up. "Downward" is the direction toward the downward direction in the vertical direction, and "horizontal" is the direction toward the horizontal direction.

<Embodiment 1>
First, FIG. 1 shows a lid 100 according to the first embodiment of the present invention. 1 is a plan view of the lid 100, FIG. 2A is a side view of the lid 100, and FIG. 2B is an end view of AA of FIG. 1A.

As shown in FIGS. 1 and 2, the lid 100 has a shallow dish shape that opens downward, and the flat top surface 110 having a substantially quadrangular plan view and the four corners of the outer peripheral edge 111 of the top surface 110 are prevented from being displaced. The portion 121 is provided with a misalignment prevention portion 122 on the center 112 side of the top surface 110. The misalignment prevention portion 121 and the misalignment prevention portion 122 project upward from the surface of the top surface 110, and as will be described later, when the heat-resistant packaging container 300 is stacked, the upper portion of the stack is stacked. The heat-resistant packaging container 300 is prevented from laterally displaced. The deviation prevention portion 121 formed along the outer peripheral edge 111 is not provided around the steam vent valve 170, and in particular, the direction from the steam vent valve 170 to the outside (direction from the central 112 to the outer peripheral 111) is The misalignment prevention unit 121 is not provided. Therefore, as will be described later, the steam discharged from the steam vent valve 170 to the outside is not blocked by the displacement prevention unit 121.

Further, a side wall 130 that is continuous diagonally downward from the outer peripheral 111 of the top surface 110, a lid side flange portion 140 that extends outward from the side wall 130, and a skirt portion that extends downward from the lid side flange portion 140. The 150 and the fitting portion 160 protruding inward of the skirt portion 150 are provided. The side wall 130, the lid side flange portion 140, and the skirt portion 150 are provided continuously or intermittently over the entire circumference in the circumferential direction of the lid body 100.

The lid 100 has a substantially quadrangular shape in a plan view, but is not limited to this, and may have an arbitrary shape such as a substantially polygonal shape in a plan view or a substantially circular shape in a plan view. Further, the deviation prevention portion 121 on the outer peripheral 111 side has a substantially L-shaped shape in a plan view, and the deviation prevention portion 122 on the center 112 side has a substantially square ring shape in a plan view, but the displacement prevention portion 121 is not limited to this. The misalignment prevention portion 122 may have any shape.

Further, as shown in FIGS. 1 and 2, the top surface 110 is provided with four steam vent valves 170. The steam vent valve 170 is arranged along the outer circumference 111 of the top surface 110, and is configured to open outward, that is, from the center 112 toward the outer circumference 111. Specifically, the steam vent valve 170 includes a valve body 171 and a valve hole 172 that is closed by the valve body 171, and the end 173 of the valve body 171 is integrated with the top surface 110. , The tip 174 side of the valve body 171 is separated from the top surface 110. Therefore, as will be described later, the tip 174 of the valve body 171 of the steam vent valve 170 is opened so as to be lifted, and the opened portion becomes the opening 175, via the valve hole 172 exposed to the outside from the opening 175. , The steam in the container can be discharged to the outside.

The steam vent valve 170 is formed by making a notch on the tip 174 side of a part of the top surface 110, leaving only the end 173 side, but the steam vent valve 170 is not limited to this and is formed by any method. You may. Further, the steam vent valve 170 has a substantially U-shape as shown in FIG. 1, but the shape is not limited to this and may be any shape. Further, the steam vent valve 170 is not limited to the valve body 172 in which the valve hole 172 is completely closed by the valve body 171 but may be in a mode in which the valve body 171 closes only a part of the valve hole 172. ..

Next, FIG. 3 shows the container body 200 covered by the lid 100 of the present invention. 3A is a plan view of the container body 200, FIG. 3B is a side view of the container body 200, and FIG. 3C is a BB end view.

As shown in FIG. 3, the container body 200 has a deep dish-shaped shape that opens upward, and has a flat bottom surface 210 having a substantially quadrangular plan view and legs 220 that bulge downward on the outer peripheral 211 of the bottom surface 210. It is provided. The inside of the leg portion 220 is a recessed recess 221. When the heat-resistant packaging container 300 is stacked, the misalignment prevention portion 122 of the stacked lower lid 100 abuts on the recess 221. Therefore, the stacked heat-resistant packaging containers 300 are prevented from laterally displaced. Further, it includes a side wall 230 formed so as to rise from the outer peripheral 211 of the bottom surface 210, a container-side flange portion 240 extending outward from the side wall 230, and a fitting portion 260 protruding outward from the container-side flange portion 240. .. The side wall 230, the container-side flange portion 240, and the fitting portion 260 are continuously or intermittently provided over the entire circumference of the container body 200 in the circumferential direction. The container body 200 has a substantially quadrangular shape in a plan view, but is not limited to this, and may have an arbitrary shape such as a substantially polygonal shape in a plan view or a substantially circular shape in a plan view.

The lid body 100 and the container body 200 are sheet-formed (for example, vacuum forming, pressure-pneumatic forming, hot plate forming) using a sheet-shaped heat-resistant material having a thickness of about 0.1 mm to 1.00 mm. As the heat-resistant material of the lid 100 and the container body 200, for example, biaxially stretched polystyrene, polypropylene containing a filler, heat-resistant PET, heat-resistant polylactic acid and the like can be used.

Next, the heat-resistant packaging container 300 in which the lid 100 of the present invention is fitted to the container body 200 will be described with reference to FIGS. 4 and 5. 4 (a) is a plan view of the heat-resistant packaging container 300, FIG. 4 (b) is a side view of the heat-resistant packaging container 300, and FIG. 5 is a CC end face of FIG. 4 (a). It is a figure.

As shown in FIGS. 4 and 5, the lid 100 is covered from above the container body 200, and the fitting portion 160 of the lid 100 is fitted to the fitting portion 260 of the container body 200 for heat-resistant packaging. The container 300 is closed. Further, since the flange portion 140 on the lid side of the lid 100 and the flange portion 240 on the container side of the container body 200 are overlapped and adhered to each other, the heat-resistant packaging container 300 is prevented from being mixed with foreign matter such as dust. It has become. The fitting portion 160 of the lid 100 is externally fitted to the fitting portion 260 of the container body 200, and the heat-resistant packaging container 300 is closed, but the lid 100 and the container are not limited to this. The fitting with the main body 200 may be in any mode.

Then, heated foods and the like are stored in the storage space 301 inside the heat-resistant packaging container 300, and for example, the heat-resistant packaging container 300 is transported to another place or displayed and sold at a store. Further, when the heat-resistant packaging container 300 is transported or displayed for sale, a plurality of heat-resistant packaging containers 300 may be stacked as shown in FIGS. 6 and 7. 6 is a side view of the stacked heat-resistant packaging containers 300, FIG. 7A is a plan view of the stacked lower heat-resistant packaging container 300, and FIG. 7B is steam. It is a DD cross-sectional view which showed the periphery of a vent valve 170 in an enlarged manner. Further, in FIG. 7A, the bottom surface 210 of the heat-resistant packaging container 300 stacked on the upper side is shown by diagonal lines.

As shown in FIG. 6, the container body 200 of the heat-resistant packaging container 300 stacked on the upper side is placed on the lid 100 of the heat-resistant packaging container 300 on the lower side. Specifically, the bottom surface 210 of the container body 200 of the upper heat-resistant packaging container 300 is placed on the top surface 110 of the lid 100 of the lower heat-resistant packaging container 300. At that time, on the outside of the bottom surface 210 of the container body 200 of the upper heat-resistant packaging container 300, the displacement prevention portion 121 protruding from the top surface 110 of the lower heat-resistant packaging container 300 is arranged. The stacked heat-resistant packaging container 300 is stably placed on the lid 100 of the lower heat-resistant packaging container 300 without being laterally displaced. Further, as shown in FIG. 7B, inside the bottom surface 210 of the container body 200 of the upper heat-resistant packaging container 300, the recess 221 of the bottom surface 210 and the top surface of the lower heat-resistant packaging container 300 Since the misalignment prevention portion 122 protruding from the 110 is arranged, the stacked heat-resistant packaging container 300 does not shift laterally on the lid 100 of the lower heat-resistant packaging container 300. It is stably placed.

As described above, the heat-resistant packaging container 300 stacked on the upper side does not shift laterally on the lid 100 of the lower heat-resistant packaging container 300, so that the heat-resistant packaging container 300 stacked on the upper side does not shift laterally. It is possible to prevent the packaging container 300 from being displaced and blocking the steam vent valve 170 provided on the lid 100 of the lower heat-resistant packaging container 300.

Further, as shown in FIG. 7, the bottom surface 210 of the container body 200 of the heat-resistant packaging container 300 stacked on the upper side is a steam vent valve on the top surface 110 of the lower heat-resistant packaging container 300. Since it is arranged inside the end 173 of the 170, the steam vent valve 170 provided on the lid 100 of the lower heat-resistant packaging container 300 is the container of the heat-resistant packaging container 300 stacked on the upper side. It is not blocked by the bottom surface 210 of the main body 200. That is, the steam vent valve 170 has a non-contact portion from the end 173 to the tip 174 where the entire steam vent valve 170 does not come into contact with the container body 200 of the heat-resistant packaging container 300 stacked on the upper side. Become. Then, as shown in FIG. 7B, when the heat-resistant packaging container 300 is stacked, a space 176 is formed above the steam vent valve 170, which is a non-contact portion, and this space 176 is stacked on the upper side. It communicates to the outside of the container body 200 of the heat-resistant packaging container 300.

Further, the steam S generated from the heated food contained in the storage space 301 of the lower heat-resistant packaging container 300 increases the pressure in the lower heat-resistant packaging container 300. Then, as shown in FIG. 7B, the valve body 171 of the steam vent valve 170, which is a non-contact portion, is lifted upward by the internal pressure, and the tip 174 side of the valve body 171 opens away from the valve hole 172. The portion 175 is formed. Therefore, the steam S in the heat-resistant packaging container 300 is discharged from the valve hole 172 to the outer space 176 through the opening 175. Further, since the steam vent valve 170 faces outward, the opening 175 also faces the outside of the container body 200. Therefore, the steam S discharged from the opening 175 of the steam vent valve 170 goes to the outside of the container body 200. As a result, the steam S in the heat-resistant packaging container 300 does not accumulate in the heat-resistant packaging container 300, and the food inside can be prevented from containing the moisture of the steam S and deteriorating in quality.

In this way, the entire (whole) steam vent valve 170 becomes a non-contact portion that does not come into contact with the container body 200 of the heat-resistant packaging container 300 stacked on the upper side, and the upper side of the steam vent valve 170 that is the non-contact portion. Since the space 176 that can be created communicates with the outside of the container body 200 of the heat-resistant packaging container 300 stacked on the upper side, the steam S in the lower heat-resistant packaging container 300 is stacked on the upper side. The heat-resistant packaging container 300 is effectively discharged outward by the steam vent valve 170 without being blocked by the container body 200. In particular, since the opening 175 of the steam vent valve 170 is a non-contact portion that does not come into contact with the container body 200 of the heat-resistant packaging container 300 stacked on the upper side, the steam S discharged from the opening 175 is The heat-resistant packaging container 300, which is stacked on the upper side, is discharged more effectively toward the outside without being hindered by the container body 200 of the heat-resistant packaging container 300. Further, since the steam S is discharged toward the outside of the container body 200 of the heat-resistant packaging container 300 stacked on the upper side, the steam S is discharged onto the surface of the container body 200 of the heat-resistant packaging container 300 stacked on the upper side. Water droplets and the like due to the steam S do not adhere, and the heat-resistant packaging container 300 is easy to handle.

A total of four steam vent valves 170 are provided on the top surface 110 of the lid 100 of the heat-resistant packaging container 300, but the present invention is not limited to this, and one steam vent valve 170 or steam vent is provided. Two or more valves 170 may be provided. However, by providing four or more steam vent valves 170, the steam S can be efficiently discharged to the outside, and the lid 100 can be prevented from coming off from the container body 200 due to the pressure of the steam S. Further, since the steam vent valve 170 faces outward, even if a container (for example, a heat-resistant packaging container or other container) is placed on the heat-resistant packaging container 300, it is disturbed by the placed container. The steam S can be efficiently discharged to the outside without any problem. Further, since the steam vent valve 170 is arranged along the outer peripheral edge 111 of the top surface 110 of the lid 100, even if the container is placed on the top surface 110 of the heat-resistant packaging container 300 (considering stability). Then, since the container is placed near the center of the top surface 110), the steam vent valve 170 is not easily closed by the placed container.

Further, as shown in FIG. 1, each steam vent valve 170 has an outer circumference of the top surface 110 on each side of the top surface 110 (in FIG. 1, each of the four sides of the top surface 110 having a substantially quadrangular plan view). Since they are arranged along 111, the steam vent valves 170 are separated from each other. Therefore, even if the container is placed on the top surface 110 of the heat-resistant packaging container 300, any of the steam vent valves 170 is not easily closed by the placed container.

Further, as shown in FIG. 8, a part of the steam vent valve 170 may come into contact with the container body 200 depending on the size of the container body 200 of the heat-resistant packaging container 300 stacked on the upper side. 8 (a) is a plan view of the stacked lower heat-resistant packaging containers 300, and FIG. 8 (b) is an enlarged sectional view of the area around the steam vent valve 170. .. Further, in FIG. 8A, the bottom surface 210 of the heat-resistant packaging container 300 stacked on the upper side is shown by diagonal lines.

As shown in FIG. 8, since the bottom surface 210 of the container body 200 of the heat-resistant packaging container 300 stacked on the upper side is larger than the bottom surface 210 of the container body 200 shown in FIG. 7, it is for heat-resistant packaging on the lower side. A part of the steam vent valve 170 provided on the lid 100 of the container 300 is closed by the bottom surface 210 of the container body 200 of the heat-resistant packaging container 300 stacked on the upper side. However, the end 173 side of the steam vent valve 170 is blocked by the bottom surface 210 of the container body 200 stacked on the upper side, but the tip 174 side of the steam vent valve 170 is the container body 200 stacked on the upper side. It is a non-contact part that does not contact. Then, as shown in FIG. 8B, when the heat-resistant packaging container 300 is stacked, a space 176 is formed above a part (tip 174 side) of the steam vent valve 170, which is a non-contact portion, and this space is formed. The 176 communicates with the outside of the container body 200 of the heat-resistant packaging container 300 stacked on the upper side.

Then, when the pressure inside the lower heat-resistant packaging container 300 is increased by the steam S emitted from the food contained in the storage space 301 of the lower heat-resistant packaging container 300, as shown in FIG. 8 (b). The end 173 side blocked by the bottom surface 210 of the container body 200 is not lifted, but the tip 174 side of the valve body 171 which is a non-contact part is lifted upward, and the tip 174 side of the valve body 171 is the valve hole 172. The opening 175 is formed apart from. Therefore, the steam S in the heat-resistant packaging container 300 is discharged from the valve hole 172 to the space 176 side through the opening 175. Further, since the steam vent valve 170 faces outward, the opening 175 also faces the outside of the container body 200. Therefore, the steam S discharged from the opening 175 of the steam vent valve 170 goes to the outside of the container body 200.

In this way, a part of the steam vent valve 170 becomes a non-contact portion that does not come into contact with the container body 200 of the heat-resistant packaging container 300 stacked on the upper side, and can be formed on the upper side of the steam vent valve 170 that is the non-contact portion. Since the space 176 communicates to the outside of the container body 200 of the heat-resistant packaging container 300 stacked on the upper side, the steam S in the lower heat-resistant packaging container 300 is stacked on the upper side. The heat-resistant packaging container 300 is effectively discharged outward by the steam vent valve 170 without being blocked by the container body 200. Further, since the steam S is discharged toward the outside of the container body 200 of the heat-resistant packaging container 300 stacked on the upper side, the steam S is discharged onto the surface of the container body 200 of the heat-resistant packaging container 300 stacked on the upper side. Water droplets and the like due to steam S do not adhere.

In order to prevent the stacked heat-resistant packaging containers 300 from shifting, a slip prevention portion 122 that fits into the recess 221 of the bottom surface 210 of the container body 200 is provided on the top surface 110 of the lid 100. Not limited to this, the displacement prevention portion 122 may be provided on the bottom surface 210 side of the container body 200, and the recess 221 may be provided on the top surface 110 side of the lid body 100. Further, although the displacement prevention portion 122 on the center side has a convex shape, it has an arbitrary shape such as a concave shape as long as it can come into contact with a part of the bottom surface 210 of the container body 200 to prevent the displacement of the heat-resistant packaging container 300. May be. Similarly, the displacement prevention portion 121 on the center side on the outer peripheral side is convex, but if it can be brought into contact with a part of the bottom surface 210 of the container body 200 to prevent the displacement of the heat-resistant packaging container 300, it may be concave or the like. It may be any shape of. Further, the lid 100 includes both the inner slip prevention portion 121 and the outer slip prevention portion 122, but only one of them may be provided.

As shown in FIGS. 7 and 8, the valve body 171 of the steam vent valve 170 is configured to cover the entire valve hole 172, but the valve body 171 is not limited to this, and the valve body 171 is a part of the valve hole 172. It may be configured to cover. In that case, even when the valve body 171 is closed, a part of the valve hole 172 is always exposed to the outside, so that the exposed part of the valve hole 172 is one of the openings 175 of the steam vent valve 170. It will form a part. Then, a part of the valve hole 172 that is always exposed to the outside, that is, the opening 175 is set as a non-contact portion that does not come into contact with the container body 200 of the heat-resistant packaging container 300 stacked on the upper side. The steam S in the heat-resistant packaging container 300 on the side is effectively discharged outward by the steam vent valve 170 without being blocked by the container body 200 of the heat-resistant packaging container 300 stacked on the upper side. It is.

<Embodiment 2>
Next, FIGS. 9 to 13 show a heat-resistant packaging container 300A according to the second embodiment of the present invention. The configuration of the heat-resistant packaging container 300A according to the second embodiment includes the heat-resistant packaging container 300 according to the first embodiment shown in FIGS. 1 to 8 and a steam vent hole 180A instead of the steam vent valve 170. The other configurations are the same as those in the first embodiment, except that the lid 100A and the container body 200A are substantially circular in plan view, and the misalignment prevention portion 122A and the recess 221A are different from each other. Since it is basically the same as the heat-resistant packaging container 300, detailed description thereof will be omitted. 9 is a plan view of the lid 100A according to the second embodiment of the present invention, FIG. 10A is a side view of the lid 100A, and FIG. 10B is an FF end view of FIG. Is.

As shown in FIGS. 9 and 10, the lid 100A has a shallow dish shape with a downward opening, and is convex on both sides of a flat top surface 110A having a substantially circular shape in a plan view and an outer peripheral edge 111A of the top surface 110A. The misalignment prevention portion 121A is provided with a convex misalignment prevention portion 122A on the central 112A side of the top surface 110A. The displacement prevention portion 121A on the outer peripheral side 111A side protrudes upward from the surface of the top surface 110A, and as will be described later, when the heat-resistant packaging container 300A is stacked, the upper portion of the stack is stacked. The outer periphery of the bottom surface 210A of the heat-resistant packaging container 300A is surrounded so that the heat-resistant packaging container 300A does not shift laterally. Further, the displacement prevention portion 122A on the central 112A side protrudes upward from the surface of the top surface 110A, and as will be described later, when the heat-resistant packaging container 300A is stacked, the upper portion of the stack is stacked. It is fitted into the recess 221A of the heat-resistant packaging container 300A to prevent the heat-resistant packaging container 300A from laterally shifting. The deviation prevention portion 121A formed along the outer peripheral edge 111A is not provided around the steam vent hole 180A, and the displacement prevention portion 121A is prevented from the steam vent hole 180A to the outside (direction from the central 112A to the outer peripheral 111A). The portion 121A is not provided. Therefore, as will be described later, the steam discharged to the outside from the steam vent hole 180A is not blocked by the displacement prevention portion 121A.

Further, a side wall 130A that is continuous diagonally downward from the outer peripheral 111A of the top surface 110A, a lid side flange portion 140A that extends outward from the side wall 130A, and a fitting portion that protrudes outward from the lid side flange portion 140A. It is equipped with 160A. The side wall 130A, the lid side flange portion 140A, and the fitting portion 160A are provided continuously or intermittently over the entire circumference in the circumferential direction of the lid body 100A.

Further, as shown in FIGS. 9 and 10, the top surface 110A is provided with four steam vent holes 180A. Two steam vent holes 180A are arranged along the outer circumference 111A of the top surface 110A, and each set of the two arranged steam vent holes 180A faces both sides of the outer circumference 111A of the lid 100A. Is located in. Further, the steam vent hole 180A is not provided with a valve body 171 like the steam vent valve 170, and the opening 175A of the steam vent hole 180A is always exposed to discharge the steam in the container to the outside. Can be done.

Next, FIG. 11 shows a container body 200A covered by the lid 100A according to the second embodiment of the present invention. 11 (a) is a plan view of the container main body 200A, FIG. 11 (b) is a side view of the container main body 200A, and FIG. 11 (c) is a GG end view.

As shown in FIG. 11, the container body 200A has a deep dish-shaped shape that opens upward, and has a flat bottom surface 210A that is substantially circular in plan view and a groove-shaped recess 221A that is recessed upward on the outer circumference 211A of the bottom surface 210A. Be prepared. The recess 221A is an annular groove, and when the heat-resistant packaging container 300A is stacked, the arc-shaped displacement prevention portion 122A of the stacked lower lid 100A is fitted and stacked. The heat-resistant packaging container 300A is designed so that it does not shift sideways. Further, it includes a side wall 230A formed so as to rise from the outer periphery 211A of the bottom surface 210A, a container-side flange portion 240A extending outward from the side wall 230A, and a fitting portion 260A protruding outward from the container-side flange portion 240A. .. The side wall 230A, the container-side flange portion 240A, and the fitting portion 260A are provided continuously or intermittently over the entire circumference in the circumferential direction of the container main body 200A.

Next, FIGS. 12 and 13 show a state in which the heat-resistant packaging containers 300A are stacked. 12 is a side view of the stacked heat-resistant packaging container 300A, FIG. 13A is a plan view of the stacked lower heat-resistant packaging container 300A, and FIG. 13B is steam. It is the HH cross-sectional view which showed the periphery of the punching hole 180A in an enlarged manner. Further, in FIG. 13A, the bottom surface 210A of the heat-resistant packaging container 300A stacked on the upper side is shown by diagonal lines.

As shown in FIG. 12, the container body 200A of the heat-resistant packaging container 300A stacked on the upper side is placed on the lid 100A of the heat-resistant packaging container 300A on the lower side. Specifically, the bottom surface 210A of the container body 200A of the upper heat-resistant packaging container 300A is placed on the top surface 110A of the lid 100A of the lower heat-resistant packaging container 300A. At that time, on the outside of the bottom surface 210A of the container body 200A of the upper heat-resistant packaging container 300A, the displacement prevention portion 121A protruding from the top surface 110A of the lower heat-resistant packaging container 300A is arranged. The stacked heat-resistant packaging container 300A is stably placed on the lid 100A of the lower heat-resistant packaging container 300A without being laterally displaced. Further, as shown in FIG. 13B, inside the bottom surface 210A of the container body 200A of the upper heat-resistant packaging container 300A, the recess 221A of the bottom surface 210A and the top surface of the lower heat-resistant packaging container 300A are formed. Since the slip prevention portion 122A protruding from 110A is fitted, the stacked heat-resistant packaging container 300A does not shift laterally on the lid 100A of the lower heat-resistant packaging container 300A. , It is stably placed.

In this way, the heat-resistant packaging container 300A stacked on the upper side does not shift laterally on the lid 100A of the lower heat-resistant packaging container 300A, so that the heat resistance stacked on the upper side does not occur. It is possible to prevent the packaging container 300A from being displaced and blocking the steam vent hole 180A provided in the lid 100A of the lower heat-resistant packaging container 300A. The lid 100A is covered from above the container body 200A, and as shown in FIG. 13B, the fitting portion 160A of the lid 100A is internally fitted to the fitting portion 260A of the container body 200A to withstand heat. The sex packaging container 300A is closed. Further, since the lid side flange portion 140A of the lid body 100A and the container side flange portion 240A of the container body 200A are overlapped and adhered to each other vertically, foreign matter such as dust is prevented from being mixed inside the heat-resistant packaging container 300A. It has become.

Further, as shown in FIG. 13, the bottom surface 210A of the container body 200A of the heat-resistant packaging container 300A stacked on the upper side is a steam vent hole on the top surface 110A of the lower heat-resistant packaging container 300A. Since it is arranged inside 180A, the steam vent hole 180A provided in the lid 100A of the lower heat-resistant packaging container 300A is the container body 200A of the heat-resistant packaging container 300A stacked on the upper side. It is not blocked by the bottom surface 210A. Therefore, the entire (whole) steam vent hole 180A is a non-contact portion that does not come into contact with the container body 200A of the heat-resistant packaging container 300A stacked on the upper side. That is, the entire opening 175A of the steam vent hole 180A is a non-contact portion that does not come into contact with the container body 200A of the heat-resistant packaging container 300A stacked on the upper side. Then, as shown in FIG. 13B, a space 176A created during stacking of the heat-resistant packaging container 300A is stacked on the upper side of the steam vent hole 180A, which is a non-contact portion, for heat-resistant packaging. It communicates to the outside of the container body 200A of the container 300A.

Further, when the pressure in the lower heat-resistant packaging container 300A increases due to the steam SA emitted from the food contained in the lower heat-resistant packaging container 300A, the opening of the steam vent hole 180A which is a non-contact portion. From 175A, the steam SA in the heat-resistant packaging container 300A is discharged to the space 176A side.

In this way, the entire (whole) steam vent hole 180A becomes a non-contact portion that does not come into contact with the container body 200A of the heat-resistant packaging container 300A stacked on the upper side, and the upper side of the steam vent hole 180A that is the non-contact portion. Since the space 176A formed in the space communicates with the outside of the container body 200A of the heat-resistant packaging container 300A stacked on the upper side, the steam SA in the lower heat-resistant packaging container 300A is stacked on the upper side. The heat-resistant packaging container 300A is effectively discharged to the outside through the steam vent hole 180A without being blocked by the container body 200A. In particular, since the opening 175A of the steam vent hole 180A is a non-contact portion that does not come into contact with the container body 200A of the heat-resistant packaging container 300A stacked on the upper side, the steam SA discharged from the opening 175A is The heat-resistant packaging container 300A stacked on the upper side is discharged more effectively without being hindered by the container body 200A. Further, since the steam SA is discharged to the outside of the container body 200A of the heat-resistant packaging container 300A stacked on the upper side, the steam SA is discharged on the surface of the container body 200A of the heat-resistant packaging container 300A stacked on the upper side. Water droplets etc. do not adhere.

A total of four steam vent holes 180A are provided on the top surface 110A of the lid 100A of the heat-resistant packaging container 300A, but the present invention is not limited to this, and one steam vent hole 180A or steam vent is provided. Two or more holes 180A may be provided. However, by providing four or more steam vent holes 180A, the steam SA can be efficiently discharged to the outside, and the lid 100A can be prevented from coming off from the container body 200A due to the pressure of the steam SA. Further, since the steam vent hole 180A is arranged along the outer peripheral edge 111A of the top surface 110A of the lid 100A, even if the container is placed on the top surface 110A of the heat-resistant packaging container 300A (considering stability). Then, since the container is placed near the center of the top surface 110A), the steam vent hole 180A is not easily closed by the placed container.

In FIG. 13B, all (whole) steam vent holes 180A are not in contact with the container body 200A of the heat-resistant packaging container 300A stacked on the upper side, but the present invention is not limited to this, for example. , A part of the steam vent hole 180A may come into contact with the container body 200A of the heat-resistant packaging container 300A stacked on the upper side. In that case, a part of the steam vent hole 180A that is not in contact with the container body 200A of the heat-resistant packaging container 300A stacked on the upper side becomes a non-contact portion. The space 176A formed above a part of the steam vent hole 180A, which is a non-contact portion, communicates with the outside of the container body 200A of the heat-resistant packaging container 300A stacked on the upper side, so that the space is on the lower side. Since the steam SA in the heat-resistant packaging container 300A is effectively discharged outward by the steam vent hole 180A without being blocked by the container body 200A of the heat-resistant packaging container 300A stacked on the upper side. be.

The heat-resistant packaging container of the present invention is provided with either a steam vent valve or a steam vent hole, but is not limited to this, and may be provided with both a steam vent valve and a steam vent hole. Further, the heat-resistant packaging container of the present invention is not limited to the above-described embodiment, and various modifications and combinations are possible within the scope of the claims and the scope of the embodiments. Modifications and combinations are also included in the scope of rights.

Claims (4)

A heat-resistant packaging container consisting of a lid with a top surface and a container body with a bottom surface.
Along the outer periphery of the top surface of the lid, four or more outward steam vent valves having openings or four or more steam vent holes having openings are provided. Heat resistant packaging container.
A heat-resistant packaging container consisting of a lid with a top surface and a container body with a bottom surface.
An outward steam vent valve having an opening or a steam vent hole having an opening is provided on the top surface of the lid.
When the container body is stacked on the lid, all or part of the steam vent valve or the steam vent hole is provided with a non-contact portion that does not come into contact with the container body.
A heat-resistant packaging container characterized in that a space formed above the non-contact portion communicates with the outside of the container body.
The heat-resistant packaging container according to claim 2, wherein the opening is the non-contact portion.
The heat-resistant packaging container according to claim 2 or 3, wherein a misalignment prevention portion is provided at least on either the top surface of the lid or the bottom surface of the container body.

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