JP2018062352A - Foamed resin container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a foamed resin container capable of draining molten water in a container body with a simple construction and sufficiently providing cold insulation effect with ice.SOLUTION: A foamed resin container 1 comprises a box-shaped container body 2 for storing fresh foods together with ice for cold insulation, and a lid body 3 for closing an upper opening of the container body 2. The container body 2 has a bottom plate and wall plates, and the bottom plate has a drainage part 24 for draining molten water accumulated in the container body 2 to the outside of the container body 2. The drainage part 24 is provided at a position close to a center of the bottom plate, and when the plurality of foamed resin containers 1 are stacked, the molten water in the container body 2 on an upper stage is drained onto an upper face of the lid body 3 on a lower stage thereof. This construction provides a sufficient cold insulation effect with ice by draining the molten water in the container body 2 onto the upper face of the lid body 3. The drainage part 24, having a simple construction, can be easily manufactured by metal mold formation.SELECTED DRAWING: Figure 9

Description

  The present invention relates to a foamed resin container for storing fresh food together with ice for cold storage.

  Conventionally, a foamed resin container having excellent heat insulation and a light weight has been used for keeping and transporting fresh foods. When fresh food is stored and transported in such a foamed resin container, ice is stored in the foamed resin container for keeping the fresh food cool.

  However, if transport is carried out for a long time, the internal ice melts and molten water accumulates at the bottom of the container, and once the molten water begins to accumulate, melting of the ice is promoted, and the fresh food cannot be sufficiently cooled, so It can also be a factor that reduces the freshness of food. For this reason, this type of foamed resin container is provided with a drainage channel for discharging the molten water accumulated inside to the outside. However, when the drain port is simply provided with the drain port facing the outside from the inside of the container body, warm outside air is mixed into the container from the drain port, and the cold insulation performance is lowered.

  Therefore, a first drainage passage that penetrates the side wall of the container body in the vertical direction and a second drainage passage that extends obliquely laterally from the inside of the container body toward the first drainage passage are provided. There is known a foamed resin container provided with a valve body that discharges water when the weight of water is applied (see, for example, Patent Document 1).

Japanese Patent Laid-Open No. 2007-45467

  However, like the foamed resin container described in Patent Document 1, the configuration in which a valve body capable of appropriately discharging water is provided at the tip of the second drainage passage extending obliquely in the lateral direction is generally complicated. As a foamed resin container to be molded, it is not easy to manufacture. Although melted water needs to be separated from ice in order to prevent the ice from accelerating melting, it is sufficiently low in temperature compared to the outside air. Not enough.

  An object of the present invention is to solve the above-mentioned problems, and to provide a foamed resin container that can drain molten water in a container body with a simple configuration and can sufficiently obtain a cooling effect by ice. And

  In order to achieve the above object, the present invention provides a foamed resin container comprising: a box-shaped container body for storing fresh food together with ice for cold storage; and a lid for closing an upper opening of the container body. The container main body has a bottom plate and a wall plate standing around the bottom plate, and the bottom plate drains the molten water accumulated in the container main body out of the container main body. The drainage part is provided at a position near the center of the bottom plate, and when a plurality of foamed resin containers are loaded, the molten water in the container body at the upper stage is at the lower stage. It drains on the upper surface of a cover body, It is characterized by the above-mentioned.

  In the foamed resin container, the lid body is composed of an edge portion provided so as to protrude upward from the peripheral edge of the upper surface thereof, and a melted water drained from the drainage portion, which is formed by a concave portion surrounded by the edge portion. It is preferable that the water receiving part has a plurality of irregularities formed on the surface thereof.

  In the foamed resin container, the container main body is provided at a peripheral edge thereof, and has a main body drainage passage penetrating in the vertical direction through the wall plate, and the lid body is provided at the peripheral edge of the container body. A lid drainage channel penetrating in a vertical direction, and a lower end of the lid drainage channel communicates with the body drainage channel of the container body when the lid body is put on the container body, and the lid body It is preferable that the upper end of the drainage channel has a water guide unit that guides the melt water of the water receiving unit to the lid drainage channel.

  In the foamed resin container, the drainage part has an upper groove formed from the upper surface side of the bottom plate and a lower groove formed from the lower surface side of the bottom plate, and the vertical surface of the upper groove and the vertical of the lower groove It is preferable that a drain outlet for draining melt water is formed by partially overlapping the surface.

  The said foamed resin container WHEREIN: It is preferable that the said container main body has an ice holding piece attached inside the said wall board.

  The said foaming resin container WHEREIN: It is preferable that the said ice holding piece has a slit which makes molten water flow to the said drainage part.

  According to the present invention, it is possible to sufficiently obtain a cooling effect by ice by draining the molten water in the container body to the upper surface of the lid. Since the drainage part has a simple configuration, it can be easily manufactured by molding.

The perspective view in the state which removed the cover body from the container main body of the foam resin container which concerns on one Embodiment of this invention. The front view when two said foamed resin containers are loaded. (A) is a side view of the container body of the foamed resin container, (b) is a top view, (c) is a cross-sectional view along line BB of (b), (d) is a bottom view, and (e) is ( DD sectional drawing of d), (f) is a front view. (A) is the sectional view on the AA line of FIG.3 (b), (b) is an enlarged view of the E section of (a), (c) is an enlarged view of the F section of (a). (A) is CC sectional view taken on the line of FIG.3 (b), (b) is an enlarged view of the G section of (a). (A) is a side view of the lid of the foamed resin container, (b) is a top view, (c) is a sectional view taken along line BB of (b), (d) is a bottom view, and (e) is a front view. The figure, (f) is CC sectional view taken on the line of (d). The DD sectional view taken on the line of FIG.6 (b). (A) is the sectional view on the AA line of FIG.6 (b), (b) is the E section enlarged view of (a), (c) is the F section enlarged view of (a). Side sectional drawing for demonstrating the flow of the molten water in the two foam resin containers located up and down.

  A foamed resin container according to an embodiment of the present invention will be described with reference to the drawings. As shown in FIG. 1, the foamed resin container 1 includes a box-shaped container body 2 for storing fresh food together with ice for cold preservation, and a lid body 3 that closes the upper opening 20 of the container body 2. . The container main body 2 and the lid body 3 are both substantially rectangular in top view, and are chamfered so that the four corners are rounded.

  The container body 2 and the lid body 3 are molded foams of foamed synthetic resin. For example, the foamed particles of thermoplastic resin are filled in a mold, heated, foamed, and integrally molded. The thermoplastic resin is, for example, a styrene resin, or may be a composite resin in which another resin such as an olefin resin is mixed with the styrene resin.

  The lid 3 has an edge 31 provided so as to protrude upward from the periphery of the upper surface thereof. As shown in FIG. 2, when a plurality of foamed resin containers 1 are stacked, the peripheral edge 21 a of the bottom plate lower surface in the upper stage is placed on the edge 31 of the lid 3 in the lower stage.

  As shown in FIGS. 3A to 3F, the container body 2 includes a rectangular bottom plate 21 whose one side is longer than the other side, and a wall plate 22 erected around the bottom plate 21. The upper opening 20 is formed by the peripheral edge on the upper end side (the side opposite to the bottom plate 21) of the wall plate 22. On the outer surface of the wall plate 22 on the short side, a handle portion 23 that is recessed inward is provided (particularly, see FIGS. 1, 3A, and 3D). The inner surface of the wall plate 22 facing the handle portion 23 protrudes inward to secure the thickness of the wall plate 22 and prevent the strength of the container from decreasing.

  The bottom plate 21 has a drainage part 24 that drains the molten water accumulated in the container body 2 to the outside of the container body 2. The drainage part 24 is provided at a position near the center of the bottom plate 21. In this embodiment, the two drainage parts 24 are provided along the normal line (AA line in FIG.3 (b)) which bisects the short side of the baseplate 21. FIG. Moreover, these drainage parts 24 are provided symmetrically with respect to the normal line (BB line in FIG.3 (b)) which bisects the long side of the baseplate 21. FIG. In addition, the position near the center of the bottom plate 21 referred to here is such that the position of the drainage portion 24 in a top view is closer to the line BB than the wall plate 22 on the short side and the wall plate on the long side. What is necessary is just to be closer to the said AA line than 22.

  The container main body 2 has an ice holding piece 25 provided inward of the wall plate 22 (see particularly FIG. 1 and FIG. 3B). The ice holding piece 25 is a long plate-like member erected from the bottom plate 21, and is provided at a position closer to the wall plate 22 than at least the drainage portion 24. In general, the closer to the wall plate 22 in the container body 2, the stronger the influence of outside air, and the higher the temperature. In the present embodiment, since the ice holding piece 25 can hold ice near the wall plate 22 in the container main body 2, it is possible to suppress an increase in the temperature of the part and keep the inside of the foamed resin container 1 uniformly cooled. can do.

  The ice holding piece 25 has a reinforcing portion 25 a that extends perpendicular to the longitudinal direction and is connected to the wall plate 22. Although the ice holding piece 25 is a long plate-like member having a small thickness, the ice holding piece 25 is connected to the wall plate 22 by the reinforcing portion 25a, so that it is difficult to break even when a large load is applied without increasing the thickness of the foamed resin. Can do. Thereby, much ice can be hold | maintained by the wall board 22 side vicinity in the container main body 2, and the cool performance of the foamed resin container 1 can be improved.

  A plurality of ice holding pieces 25 are provided with a predetermined gap therebetween, and the gaps are formed by slits 25b for flowing molten water generated by melting of the ice held by the ice holding pieces 25 to the drainage section 24 side. Become. The slits 25b can prevent molten water from accumulating in a portion surrounded by the wall plate 22 and the ice holding piece 25.

  The peripheral edge on the upper end side of the wall plate 22 has a flange 26 formed so that the inner side protrudes higher than the outer side. The flange portion 26 is fitted with a groove portion 34 (see FIG. 6C) formed on the lower surface of the lid 3 to be described later.

  The container main body 2 has a main body drainage passage 27 that is provided at each of its peripheral edges, in this embodiment, at four corners, and penetrates through the wall plate 22 in the vertical direction (particularly, FIGS. 3B and 3D). e)). The upper end of the main body drainage channel 27 is open at the flange portion 26. The peripheral edge of the upper end opening of the main body drainage channel 27 is a countersink 27a. On the lower surface of the bottom plate 21, a base portion 28 that is one step higher than the peripheral edge 21a is formed (particularly, see FIGS. 3C and 3D). This base portion 28 is fitted with a concave water receiving portion 32 surrounded by an edge portion 31 of the lid 3 to be described later. The lower end of the main body drainage channel 27 opens at the periphery of the lower surface of the bottom plate 21. In addition, in the lower end opening of the main body drainage channel 27, the opening edge 27b protrudes downward.

  As shown in FIGS. 4A and 4B, the drainage section 24 has an upper groove 24 a formed from the upper surface side of the bottom plate 21 and a lower groove 24 b formed from the outer surface side of the bottom plate 21. The upper groove 24a has a right triangle shape in a cross-sectional view along the vertical direction of the container body 2, and includes a vertical surface 24a1 formed in the vertical direction and an inclined surface 24a2 formed in the inclination direction. The lower groove 24b is rectangular in the cross-sectional view and has a pair of vertical surfaces 24b1 and 24b2 formed in the vertical direction. In the present embodiment, the vertical surface 24a1 of the upper groove 24a and the one vertical surface 24b1 of the lower groove 24b partially overlap each other, thereby forming a drain port 24c for draining molten water.

  For example, in the case of providing a drain port that simply penetrates from the upper surface side to the outer surface side in the bottom plate 21, if the size of the drain port is too small, the drainage property is deteriorated, whereas, if the size of the drain port is too large, There is a risk of ice leaking to the bottom. On the other hand, in this embodiment, since the upper groove 24a is dug by the inclined surface 24a2, the opening of the upper groove 24a becomes large, and the molten water can be effectively guided to the drain port 24c. Moreover, since the magnitude | size of the drain outlet 24c connected with the lower groove 24b can be made small with respect to opening of the upper groove 24a, it can suppress that ice leaks to a lower stage.

  Moreover, in the drainage part 24 of this embodiment, since the drainage opening 24c is opened in the perpendicular direction of the bottom plate 21, the top view (see FIG. 3B) and the bottom view (FIG. 3D) of the bottom plate 21. The drain port 24c is not visually recognized directly from any of the above. Therefore, the drainage part 24 is not conspicuous, and the appearance as the foamed resin container 1 can be improved.

  As shown in FIGS. 4A and 4C, protrusions 26a and 26b are respectively formed on the outer surface of the flange portion 26 and the upper end of the inner surface of the wall plate 22 (FIGS. 3A, 3C, and 3F). See also)). These protrusions 26a and 26b are engaged with the protrusions on the lid body 3 side (details will be described later) when the lid body 3 is put on the container body 2 so that the internal space of the container body 2 is sealed. In addition, the lid 3 can be prevented from being easily detached from the container body 2. In addition, although the figure shows a configuration in which the projections 26b on the inner surface of the wall plate 22 are provided in two rows, the projections 26b only need to be one row, and may not extend long in the horizontal direction. A protrusion provided partially may be used.

  As shown in FIGS. 5 (a) and 5 (b), the base portion 28 is formed with a concave portion 28a that is slightly recessed from the outer surface thereof. The recess 28a includes at least a region where the drainage portion 24 (see also the lower groove 24b and FIG. 3D) is formed, and extends from the region to the peripheral side in a band shape. In the present embodiment, the recess 28 a is formed in a cross shape at the center of the bottom plate 21. When fresh food or ice is stored in the container body 2, the vicinity of the center of the bottom plate 21 may be slightly bent downward. In the present embodiment, since the concave portion 28a is formed on the bottom surface of the bottom plate 21, even if the vicinity of the center of the bottom plate 21 is slightly bent downward, the portion contacts the top surface (water receiving portion 32) of the lid 3. In addition, the opening of the drainage part 24 is not blocked by the upper surface of the lid 3. Therefore, the molten water can be reliably drained from the drainage part 24 to the upper surface of the lid 3. In addition, the amount of depressions with respect to the base portion 28 of the recess 28a may be 0.5 to 1 mm.

  As shown in FIGS. 6A to 6F, the lid body 3 is a rectangular plate-like member having one side longer than the other side, and includes an edge portion 31 and a recessed portion surrounded by the edge portion 31. And a water receiving portion 32 for receiving the melted water drained from the drainage portion 24 of the container body 2. The water receiving portion 32 has a plurality of irregularities 33 formed on the surface thereof. The irregularities 33 are composed of convex portions 33 a and concave portions 33 b, and the convex portions 33 a and the concave portions 33 b are provided in a lattice shape over the entire surface of the water receiving portion 32.

  The lid 3 has a groove 34 that fits with the flange 26 of the container body 2 on the periphery of the lower surface thereof. The groove 34 is formed between the inner frame 35 and the outer frame 36 (see also FIG. 7 described later). The inner frame 35 protrudes below the outer frame 36 and fits inside the flange 26 when the lid 3 is put on the container body 2. The outer frame 36 is formed along the outer peripheral shape of the lid body 3 and fits outside the flange portion 26.

  The lid 3 is provided at each of its peripheral edges, in this embodiment, at four corners, and has a lid drainage passage 37 penetrating the lid 3 itself in the vertical direction (particularly, FIGS. 6B and 6D). reference). The upper end of the lid drainage channel 37 is open in the water receiving part 32. In addition, the upper end of the lid body drainage channel 37 has a water guide portion 38 that guides the melted water of the water receiving unit 32 to the lid body drainage channel 37. As shown in FIG. 7, the water guide portion 38 is a concave portion that is recessed from the convex portion 33 a of the water receiving portion 32, and the recess becomes deeper from the center direction of the lid body 3 toward the lid body drainage channel 37. Is formed.

  The lower end of the lid drainage channel 37 is open at the groove 34. At the lower end opening of the lid drainage channel 37, the opening edge 37 a protrudes downward and fits into the countersink 27 a of the main body drainage channel 27. Accordingly, when the lid body drainage channel 37 and the main body drainage channel 27 communicate with each other, it is possible to prevent the drainage flowing from the lid body drainage channel 37 from flowing into the container body 2 when flowing into the main body drainage channel 27. it can.

  The peripheral edge of the upper end opening of the lid drainage channel 37 is also a countersink 37b, and the opening edge 27b of the main body drainage channel 27 protrudes downward (see FIG. 3 (e)). Therefore, when a plurality of foamed resin containers 1 are loaded, the opening edge 27b of the main body drainage channel 27 in the upper container body 2 is fitted into the countersink 37b of the lid drainage channel 37 of the lower lid body 3. . Thereby, when the wastewater that has flowed from the main body drainage channel 27 flows to the lid body drainage channel 37, it can be prevented from flowing into the water receiving portion 32 of the lid body 3.

  As shown in FIGS. 8 (a) and 8 (b), among the irregularities 33 formed on the water receiving portion 32, the convex portion 33a gently swells from the surface of the water receiving portion 32, and the area of the convex portion 33a is increased. A wide groove between adjacent convex portions 33a becomes a substantial concave portion 33b. The protrusion height of the convex portion 33a with respect to the concave portion 33b may be, for example, 0.5 mm. As shown in FIG. 8C, a concave portion 35 a is provided on the outer surface of the inner frame 35, and a convex portion 36 a is provided on the inner surface of the outer frame 36. The concave portion 35a and the convex portion 36a engage with protrusions 26a and 26b (see FIG. 4C) formed on the flange portion 26 of the container main body 2, respectively.

  The drainage process of the molten water in the foamed resin container 1 configured as described above will be described with reference to FIG. Here, the container body 2 and the lid body 3 of the foamed resin container 1 in the lower stage and the container body 2 of the foamed resin container 1 in the upper stage are shown, and the lower lid body 3 and the upper stage of the container body 2 are shown. A space is provided between the container body 2 and the container body 2 for explanation.

  The melted water generated by melting the ice stored in the upper container body 2 flows on the lower surface of the bottom plate 21, reaches the drainage part 24 provided at a position closer to the center, and forms an upper groove constituting the drainage part 24. 24a flows along the inclined surface 24a2 (see also FIG. 4 (b)), passes through the drainage port 24c, and is drained from the lower groove 24b to a position near the center of the water receiving portion 32 on the upper surface of the lid 3 at the lower stage. The Since the unevenness 33 is formed in a lattice pattern in the water receiving portion 32, the melted water drained from the lower groove 24b is spread over the entire surface of the water receiving portion 32 by the concave portion 33b of the unevenness 33 (see also FIG. 8B). Spread. Since the melted water is sufficiently low in temperature compared to the outside air, the melted water diffuses over the entire surface of the water receiving portion 32, thereby cooling the gap between the lid 3 itself and the upper lid 3 and the lower container body 2. it can.

  As described above, in this embodiment, the molten water in the container body 2 is not immediately drained to the outside, but is drained to the upper surface of the lid 3 at the lower stage, so that a sufficient cooling effect by ice can be obtained. it can. In particular, the temperature rise at the position near the center of the container body 2 can be suppressed. Further, the drainage section 24 has a simple configuration in which an upper groove 24a is formed from the upper surface side of the bottom plate 21 and a lower groove 24b is formed from the lower surface side of the bottom plate 21 so that the vertical surfaces 24a1 and 24b1 partially overlap each other. Therefore, it can be easily manufactured by molding.

  Here, since the convex part 33a is formed in the water receiving part 32, the clearance gap between the upper cover body 3 and the lower container main body 2 is limited, and the molten water hold | maintained at the water receiving part 32 is few. is there. Therefore, the melted water is drained from the drainage part 24, so that the melted water on the upper surface of the lid body 3 circulates from the center to the peripheral direction through the recess 33b. As a result, the gap between the lid 3 itself and the upper lid 3 and the lower container body 2 can be effectively cooled.

  The melted water circulated in the peripheral direction of the water receiving portion 32 is guided to the lid drainage channel 37 via the water guiding portion 38, and externally via the main body drainage channel 27 of the container body 2 communicating with the lid drainage channel 37. Drained. That is, the melted water discharged from the drainage part 24 of the container body 2 in the upper stage only cools the upper surface of the lower lid 3 and is then discharged to the outside. Since the water drained into the main body drainage channel 27 and the lid drainage channel 37 is warmed by the outside air, in this embodiment, this water is separated into the gap between the container body 2 and the upper lid body 3 and the lower container body 2. By not mixing them in, the temperature drop inside them can be suppressed.

  In addition, because of the convex portion 33a of the water receiving portion 32, the gap between the upper lid body 3 and the lower container body 2 is slight, and the slight gap is also filled with molten water. Almost no outside air flows into the gap. Therefore, according to this embodiment, it is not necessary to provide a drainage passage or the like extending obliquely in the lateral direction as in the conventional example, and it is not necessary to provide a valve body at the tip, so a foamed resin container is simple and easy to manufacture. Can be obtained.

  The present invention is not limited to the above embodiment as long as the molten water is drained from the drainage portion provided near the center of the bottom plate in the container body to the upper surface of the lid at the lower stage. Various modifications are possible. For example, in the above-described embodiment, the configuration in which the two drainage portions 24 are provided on the bottom plate 21 is shown. However, three or more drainage portions 24 may be provided, and are not necessarily limited to A- in FIG. It may not be along the A line and may not be symmetric with respect to the BB line. For example, the four drainage parts 24 may be provided along the diagonal line of the baseplate 21 (not shown). The opening shape of the upper groove 24a of the drainage part 24 in a top view is not limited to the rectangular shape as illustrated, and may be a circular shape, a sector shape, or the like. Further, a groove (not shown) for facilitating the flow of molten water to the drainage part 24 may be formed on the upper surface of the bottom plate 21.

DESCRIPTION OF SYMBOLS 1 Foamed resin container 2 Container main body 21 Bottom plate 22 Wall plate 24 Drainage part 24a Upper groove 24a1 Vertical surface 24b Lower groove 24b1 Vertical surface 24c Drain outlet 25 Ice holding piece 25b Slit 27 Main body drainage path 3 Cover body 31 Edge part 32 Water receiving part 37 Cover body drainage channel 38

Claims (6)

A foamed resin container comprising: a box-shaped container main body for storing fresh food together with ice for cold storage; and a lid for closing the upper opening of the container main body,
The container body has a bottom plate and a wall plate standing around the bottom plate,
The bottom plate has a drainage part for draining molten water collected in the container body to the outside of the container body,
The drainage portion is provided at a position near the center of the bottom plate, and when a plurality of foamed resin containers are loaded, the molten water in the container body at the upper level is placed on the upper surface of the lid at the lower level. A foamed resin container characterized by draining. The lid body includes an edge portion provided so as to protrude upward from the peripheral edge of the upper surface, a water receiving portion configured to include a concave portion surrounded by the edge portion, and receiving melt water drained from the drainage portion, Have
The foamed resin container according to claim 1, wherein the water receiving portion has a plurality of irregularities formed on a surface thereof. The container body has a main body drainage channel provided at the periphery thereof and penetrating through the wall plate in the vertical direction,
The lid body is provided at a peripheral edge thereof, and has a lid body drainage channel penetrating the lid body in the vertical direction.
The lower end of the lid body drainage channel communicates with the body drainage channel of the container body when the lid body is put on the container body,
3. The foamed resin container according to claim 2, wherein an upper end of the lid body drainage channel has a water guide part that guides the molten water of the water receiving part to the lid body drainage channel. The drainage section has an upper groove formed from the upper surface side of the bottom plate, and a lower groove formed from the lower surface side of the bottom plate,
4. The drain port for draining melt water is formed by partially overlapping a vertical surface of the upper groove and a vertical surface of the lower groove. 5. Foamed plastic container.   5. The foamed resin container according to claim 1, wherein the container main body has an ice holding piece provided inside the wall plate. 6.   The foamed resin container according to claim 5, wherein the ice holding piece has a slit for flowing molten water to the drainage portion.

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