JP4960113B2 - Cold storage container for home delivery - Google Patents

Description

The present invention relates to a cold storage container for home delivery mainly used for transporting, delivering, storing, etc. of frozen foods and foods.

  For example, in the delivery of frozen foods, foodstuffs, and other products ordered by consumer cooperatives (hereinafter referred to as “co-ops”), cold insulated containers made of foamed resin with heat insulation properties are generally used and are usually transported. These frozen foods and foods are stored and used together with cold insulation materials such as dry ice and cold storage materials. In general, a cold container used for home delivery of products of a co-op has a substantially rectangular parallelepiped shape with an internal volume of about 10 to 25 liters.

  Such a cold storage container is composed of a container body having a rectangular plane and a lid body that is fitted to and attached to the open end of the container body. Many fittings have a so-called internal fitting structure in which a fitting convex edge projecting on the lower surface of the container is fitted to the inside of the opening end of the container body or a notch step formed inside the opening end. .

  By the way, food, foodstuffs, etc. of the Co-op are sorted and stored in individual cold storage containers according to customer orders at the distribution center, and the containers are delivered via branches and delivered to each house. Therefore, as shown in FIG. 17, during handling, transport, storage, etc. of the cold storage container containing the above-mentioned ingredients etc. in the center, transportation from the center to a branch by a transportation truck or a delivery vehicle, or delivery to a private house, as shown in FIG. A large number of cold containers are handled in a stacked state.

  Conventionally, the cold storage container 100A is stacked with the lid body 130 attached to the container main body 110. However, the stacking height is higher for the number of stacked sheets, and the transport and storage or transportation at the distribution center is performed. As a result, the distribution efficiency deteriorated. In addition, when the delivery destination is an answering house, the cold insulation container is kept outside for a considerable period of time, and therefore the thickness of the bottom 112 of the container body 110 is relatively large. The stacking height was further increased.

  Therefore, as shown in FIG. 17, the bottom portion 112 of the container main body 110 is stacked in the lower container main body 110 without attaching the lid 130 to the middle and lower containers excluding the uppermost container. However, since the thickness of the bottom 112 is still large, the stacking height is high, and further improvement has been desired from the viewpoint of logistics efficiency such as transportation and storage or transportation.

  In addition to the frozen foods and ingredients, the cold storage container also contains a cold storage material such as dry ice or a cold storage material in the upper part, but the contents of the cold storage material are located above the upper end of the container body 110. If it protrudes to the part where the bottom edge 112 of the container main body 110 or the fitting convex edge of the lid 130 fits inside, the bottom 112 of the container main body 110 or the lid 130 is fitted. There is a risk that it will be blocked and deposited in an incompletely fitted state. If the above-mentioned fitting is incomplete, the cooling effect is lowered, and there is a possibility that the stacked state of the containers may be inclined and unstable.

  Therefore, the present inventors pay attention to the fact that in the stacked state of the cold storage containers, the bottom of the middle and lower container bodies excluding the uppermost container does not contribute to the cold insulation effect, When stacking only the container main body without closing the lid, remove the middle and lower containers, and reduce the thickness of the bottom without lowering the cooling effect, further reducing the stacking height, transporting, storing and transporting Etc. to further improve logistics efficiency.

  As a container to be used without being closed, Patent Document 1 provides a notch for fitting at the upper end of the side wall and a protrusion that fits into the notch at the bottom of the container. There is disclosed a transporting container that is stacked in a fitted state by a notch part and the protruding part and is used by closing only the uppermost container.

  In the case of this transporting container, the protrusion on the bottom bottom surface of the upper container is fitted into the notch on the upper end of the side wall of the lower container, and the protrusion is on the rising wall outside the notch. On the other hand, it is configured to fit inside. In addition, the bottom surface inside the protrusion at the bottom of the container remains the original bottom of the container, and in the stacked state in which the protrusion is fitted into the notch, the bottom is within the same level as the top surface of the side wall. is there.

For this reason, if the contents protrude beyond the upper end of the container, or protrude beyond the fitting notch, the protrusion may not be completely fitted into the notch. Therefore, it is not suitable for use as a cold storage container for home delivery of co-op products in which dry ice or the like accommodated on the frozen food or foods often protrudes from the upper end of the container. Moreover, since the protrusion of the uppermost container also fits into the notch at the upper end of the side wall of the lid of the uppermost container, there is a possibility that it cannot be smoothly fitted due to the protrusion of the contents.
Registered Utility Model No. 3022896

  The present invention has been made in view of the above, and as a cold storage container mainly used for home delivery of frozen foods, foods, etc., the thickness of the bottom is reduced without reducing the cold storage effect, and the container body is fitted. In addition to being able to stack stably and bulky in a combined state, even if the contents such as frozen food or foodstuffs or a cold insulation material such as dry ice protrudes upward, there is no risk of hindering the fitting, It is an object of the present invention to provide a cold insulation container that can be easily fitted for stacking and can retain a good cold insulation effect even in individual containers.

The cold storage container of the present invention that solves the above-mentioned problems is a foamed resin container comprising a flat rectangular container body that opens upward, and a lid body that fits externally to the open end of the upper end of the side wall of the container body. The bottom surface of the bottom of the container body is provided with a fitting peripheral wall projectingly fitted to the opening end of the lower container body when the plurality of container main bodies are stacked, The bottom lower surface is recessed so as to be located above the upper end surface of the open end of the lower container body during the stacking. Further , the opening end portion of the container body is formed with a notch step portion on the outside leaving a convex edge on the inside, and the fitting peripheral wall on the bottom surface of the bottom is located on the opening end portion with respect to the opening end portion. It is provided so as to be fitted outside by forming a notch step portion and a convex edge corresponding to the convex edge and the notch step portion, respectively, and the bottom surface of the inner bottom of the fitting peripheral wall is recessed. It is a configuration. Furthermore, a concave portion for the handle portion is formed in the outer surface central portion of the opposing side wall on the short side of the container body, and the concave portion is continuously extended to the lower end portion of the convex edge of the fitting peripheral wall on the bottom bottom surface. A part of which is notched, and is fitted to the inside of the short peripheral side fitting peripheral wall on the bottom bottom surface, and to the inside of the opening end of the lower container body when the container main body is stacked, and the same height as the fitting peripheral wall The projecting ribs are provided so as to protrude.

  According to the cold storage container of the present invention, when handling the cold storage containers in a state where the frozen foods, foods, etc. are sorted and stored in a distribution center or the like in a stacked state, or from the distribution center to a branch or delivery to a private house When the stacking state is sometimes made, the fitting peripheral wall of the bottom lower surface of the upper container body is externally fitted to the opening end of the lower container body. Particularly preferably, the outer end of the opening end is fitted with a notch step portion and a convex edge. As a result, other than the topmost container can be stacked with stability without attaching the lid, and the thickness of the unexpected part is reduced by the concave formation on the bottom bottom surface, thereby suppressing the stacking height. it can.

  And in the case of this invention, since the said fitting surrounding wall is a form which carries out external fitting with respect to the opening end part of a container main body, cold insulating materials, such as dry ice accommodated on the contents, such as a foodstuff and foodstuff, are the said. There is no risk of protruding from the fitting portion between the fitting peripheral wall and the opening end, and in particular, the bottom bottom surface inside the fitting peripheral wall of the upper container body is more than the upper end surface of the opening end of the lower container body. Since the cold insulator or the like protrudes slightly above the upper end of the side wall of the container body, the stacking and fitting are not hindered. The joint operation can be easily performed, so that the stacking can be stably performed in a predetermined fitting state.

In addition, when delivering to each door in a state where a lid is attached to each container main body, it is stopped outside in the case of an answering house, the cold insulated container of the present invention is a container main body Since the fitting peripheral wall is provided on the bottom lower surface of the base, the fitting peripheral wall serves as a support leg, and by holding a space between the bottom lower surface and the ground inside the fitting peripheral wall, Radiant heat from the ground can be suppressed, and even if the thickness of the bottom is thinner than that of the conventional one, it is possible to retain good heat insulation and maintain a good cold insulation effect.
In addition, since the concave portion for the handle portion of the outer surface central portion of the opposite side wall on the short side of the container main body is continuously formed up to the lower end portion, a part of the convex edge of the fitting peripheral wall of the bottom bottom surface is cut out, The handle recess can be formed without problems by molding a foamed resin, inside the fitting peripheral wall on the short side of the bottom bottom surface, inside the opening end of the lower container body when the container body is stacked Since the convex rib of the same height as the fitting peripheral wall is projected to be fitted, even if a notch is formed in a part of the convex edge of the fitting peripheral wall on the bottom bottom surface, In the stacked state, the convex rib formed on the inner side of the fitting peripheral wall on the short side side is fitted inside the opening end of the lower container body, so that the inside and outside of the container can also be provided at the notch portion. The air flow in the container can be blocked, so that the cool air inside the container is released. Les without, can be satisfactorily hold the cold state. Further, when the container main body is placed directly on the ground, the inflow of air into the space between the container bottom and the ground is prevented, and the cold state inside the container can be maintained well.

  In the cold insulation container, the peripheral edge portion on the lower surface side of the lid is notched by a notch step portion and a projecting edge respectively corresponding to the projecting edge and the notch step portion of the opening end portion with respect to the opening end portion. A fitting wall portion that is externally fitted in a shape is protruded, and the lower surface of the lid plate portion that is inward of the fitting wall portion is above the upper end surface of the opening end portion when fitted to the container body. It is preferable to be recessed so as to be in the position.

  Accordingly, the fitting wall portion of the lid body is formed in a phased shape by the notch step portion and the convex edge and is externally fitted to the opening end portion of the container main body, so that a stable adherence state can be obtained. In addition to being able to hold the cooling effect inside the container satisfactorily, the lid can be fitted and attached without any problem even if the cooling material or the like slightly protrudes above the upper end of the side wall of the container body.

  Further, the upper surface side peripheral portion of the lid body is formed by a convex portion and a notch step portion corresponding respectively to a notch step portion and a convex edge of the fitting peripheral wall with respect to the fitting peripheral wall of the bottom lower surface of the container body. A fitting portion having a phase-out shape is formed, the upper surface of the lid plate portion on the inner side of the fitting portion is formed higher than the fitting portion, and the fitting peripheral wall of the container body is fitted to the fitting portion. In the state, the cover plate portion may be formed so as to be fitted to the inner portion of the fitting peripheral wall.

  In this case, the fitting peripheral wall of the bottom bottom surface of the container body is fitted to the fitting portion of the upper peripheral edge portion of the lid body, and the inner portion of the fitting peripheral wall is fitted to the lid plate portion of the lid body. By combining, the lid can be used as a cradle for receiving the container body. When used in this way, the thickness of the bottom portion of the container body and the thickness of the lid plate portion of the lid body overlap each other, so that the heat insulating property of the bottom portion can be maintained well. For example, the heat insulation at the bottom can be made even better when kept outside in the case of home delivery at high temperatures in summer.

  In particular, in a state where the inner portion of the lid body is fitted to the inner portion of the fitting peripheral wall from the fitting portion, there is a gap between the upper surface of the inner portion and the bottom lower surface of the container body. In the case where the structure is provided as described above, the heat insulating property is further improved, and an excellent cooling effect can be exhibited.

In addition, a convex shape having the same height as the fitting peripheral wall that fits inside the opening end portion of the lower container body when the container main body is stacked inside the short peripheral side fitting peripheral wall on the bottom lower surface of the container main body A convex shape that fits into a notch portion in a convex edge of a fitting peripheral wall of the bottom surface of the bottom portion at a portion of a notch step portion at an opening end portion of an upper end of a side wall on the short side of the container body after a rib is projected. When the remaining portion is provided, the protruding portion remaining portion of the opening end portion of the lower container body is fitted to the notch portion of the fitting peripheral wall on the bottom lower surface, so that the cold state in a stacked state Is better maintained.

  Further, in the cold storage container of the previous period, the lid body has a notch that is fitted to a part of the convex edge of the fitting wall portion on the short side to the convex residual portion at the opening end portion of the container body. And a convex rib that fits inside the opening end when the container body is fitted to the opening end of the container body. can do.

  In this case, in a state in which the lid is fitted and attached to the opening end of the container body, the notch in the convex edge of the fitting wall is fitted into the ridge remaining part in the opening end, By fitting the convex rib on the inside of the fitting wall to the inside of the opening end, the air flow inside and outside the container at the notch can be blocked, and the cold inside the container is not released The interior of the container can be kept well in a cold state.

  In the cold storage container, opposite side walls on the long side of the container body are thickened inward to form a thick wall, and the upper end on the inner surface side due to the thickening is a cold storage material at the opening end. It can be formed as a stepped portion. In this case, the regenerator material can be placed and used on the stepped portion.

  Further, as the cold insulation container, a synthetic resin reinforcing material may be detachably attached to at least four corner portions of the fitting peripheral wall on the bottom lower surface of the container main body.

  According to the cold storage container of the present invention, as a cold storage container mainly used for home delivery of frozen foods, foods, etc., in handling such as transportation and storage in a distribution center, etc., or in transport from the distribution center and delivery to each door, The container main body to which the body is not attached can be stably stacked and used by fitting the opening end portion of the upper end of the side wall and the fitting peripheral wall of the bottom surface of the bottom portion. In particular, even if the contents such as food and food or the cold insulation material such as dry ice or cold storage material stored on the contents may protrude from the upper end of the container body, It can be absorbed by the space formed by the recess in the bottom surface of the bottom, and there is no risk of hindering stacking and fitting for stacking, and stacking can be performed more stably. Furthermore, the height of the stack can be kept low by reducing the thickness of the bottom by making the bottom surface concave. Therefore, it is possible to improve logistics efficiency such as transportation, storage, and transportation in the logistics center as compared to stacking containers in a closed state or stacking containers having a large bottom wall.

  In addition, in a state where the container body is covered with a lid body and separated into individual cold storage containers, a good fit is obtained by fitting the opening end portion of the container body and the fitting wall portion of the lid body. Can retain heat insulation. In addition, since the fitting peripheral wall is provided on the bottom bottom surface of the container body, when keeping it outside the door, by holding a space between the bottom bottom surface inside the fitting peripheral wall and the floor surface Even if the thickness of the bottom is thinner than before, it has good heat insulating properties and can exhibit a cold insulation effect comparable to conventional products.

  Next, embodiments of the present invention will be described based on examples shown in the drawings.

  FIG. 1 is a perspective view from the upper surface side of the container body and the lid body of the cold insulation container according to the embodiment of the present invention, and FIG. 2 is a perspective view from the lower surface side of the container body and the lid body of the same cold insulation container. 3 is a plan view of the container body, FIG. 4 is a bottom view of the container body, FIG. 5 is a plan view of the lid body, FIG. 6 is a bottom view of the lid body, and FIG. 7 is a separation state of the container body and the lid body. FIG. 8 is a half vertical sectional side view of the container main body and the lid body in a separated state, FIG. 9 is a sectional view of the container main body with the lid attached to the container main body, and FIG. 11 is an enlarged cross-sectional view in which a part of the above is omitted, FIG. 12 is a cross-sectional view taken along line XII-XII in the previous figure, and FIG. 13 is a schematic cross-sectional view in a state where the lids are stacked. It is. FIG. 14 is a diagram showing a temperature change comparison of products in a container showing a comparison of a cold insulation effect between the cold insulation container of the present invention and a conventional container.

  The cold insulation container A is a foamed resin container, and as shown in the figure, a flat rectangular container body 10 that opens upward, and a lid body that fits externally to the opening end 11 of the container body 10. 30.

  The container body 10 is integrally formed of foamed resin, and has a box shape with a bottom 12 and four side walls 13a, 13b, 13c, 13d. The opening end portion 11 at the upper end of the side wall is formed with a notch step portion 15 on the outer side, leaving the convex edge 14 on the inner side, and a fitting wall portion protruding from the lower peripheral side peripheral portion of the lid body 30 to be described later 31 is formed to fit outside.

  On the lower surface of the bottom portion 12 of the container body 10, there is a fitting peripheral wall 21 that is externally fitted into the opening end portion 11 of the lower container body 10 when the plurality of container bodies 10 are stacked. It protrudes downward along the outer periphery. That is, the fitting peripheral wall 21 is formed with an outer convex edge 24 and an inner notch step 25 having shapes corresponding respectively to the inner convex edge 14 and the outer notch step 15 of the opening end 11. When the container body 10 is stacked, the fitting peripheral wall 21 and the opening end 11 are in a phase-matched state, and the convex edge 25 is a notch step portion outside the opening end 11. 15 so as to be fitted.

  When the container body 10 is stacked, the lower surface of the inner bottom portion 12 of the fitting peripheral wall 21 is in contact with the upper end surface of the open end 11 of the lower container body 10, that is, the upper end surface. It is recessed so that it may exist in the position above the position of the said notch step part 25 which touches. Further, since the bottom surface of the bottom portion 12 is recessed as described above, the conventional container has the same bottom opening 12 thickness as the bottom opening 12 while securing the internal volume of the container body 10 as in the conventional container. It is formed thinner than the thickness of the bottom.

  The bottom 12 can withstand the weight of the contents and can be thinned within a range that does not impair the heat insulating property, and varies depending on the type of foamed resin of the material and the expansion ratio. In the case of a container made of polystyrene, the thickness can be about 15 mm. In addition, the depth of the recess in the lower surface of the bottom portion 12 can be appropriately set in consideration of the strength of the bottom portion 12 and the fitting peripheral wall 21, but in practice, for example, as illustrated, the notch step portion It is preferable that a depth of about the same dimension as the width of the fitting wall portion 21 is recessed from 25. In this case, the bottom 12 is set to have the above-described thickness.

A concave portion 17 for a handle portion is formed at the center of the outer surface of the side walls 13b, 13d facing each other on the short side of the container body 10, and the concave portion 17 continues to the lower end portion and the fitting on the bottom bottom surface is performed. A part of the convex edge 25 of the peripheral wall 21 is notched. Thereby, the said recessed part 17 can be shape-molded without a problem. Reference numeral 26 denotes a notch in the convex edge 25. Furthermore, as shown in FIG. 2 and FIG. 7, the inner side of the fitting peripheral wall 21 on the short side on the lower surface of the bottom portion 12 has an opening end portion 11 of the lower container body 10 when the container body 10 is stacked. Convex ribs 23 having the same height as the fitting peripheral wall 21 to be fitted inside are protruded, so that the air flow inside and outside the container can be blocked at the portion of the notch portion 26 when the container body 10 is stacked. It is possible to ensure sex.

  On the other hand, when the container main body 10 is stacked, the fitting peripheral wall 21 of the upper container main body 10 is formed in the notch step portion 15 at the opening end 11 of the side walls 13b and 13d on the short side of the container main body 10. A convex residual portion 16 that fits with the cutout portion 26 in the convex edge 25 is provided, thereby improving the sealing performance at the location of the cutout portion 26.

  The opposite side walls 13a and 13c on the long side of the container body 10 may have the same thickness as the opposite side walls 13b and 13d on the short side. The side walls 13a and 13c on the side are thickened inwardly to form a thick wall, and the upper end on the inner surface side due to the thickening is inside the convex edge 14 of the opening end portion 11 and from the convex edge 14 in FIG. It is formed as the step part 18 which receives the cool storage material 50 like the 9 chain line. Thereby, the cool storage material 50 can be accommodated without protruding upward from the upper end of the container body 10.

  Reference numeral 19 in the drawing is a convex portion formed on the long side cutout portion 15 at the opening end 11 and is provided so as to reinforce the long side convex edge 14. A concave portion 29 into which the convex portion 19 is fitted when the container body 10 is stacked is formed in a portion of the convex edge 24 on the long side of the fitting peripheral wall 21 on the bottom surface of the bottom portion.

  In addition, the lid 30 is formed so that the bottom surface shape is basically the same as the shape of the bottom bottom surface of the container body 10 as described below.

  In other words, a fitting wall portion 31 that protrudes from the opening end portion 11 in a phase-out shape is projected from the lower surface side peripheral portion of the lid body 30. The fitting wall portion 21 has substantially the same shape as the fitting peripheral wall 21 on the bottom surface of the bottom portion 12, and as shown in the drawing, the fitting edge 21 is formed on the convex edge 14 on the inner side of the opening end portion 11 and the outer notch step portion 15. The inner notch step portion 35 and the outer convex edge 34 corresponding to each other are formed, and when the lid body 30 is attached, the fitting wall portion 31 and the opening end portion 11 are in a phase-matched state. Therefore, the convex edge 34 is provided so as to be fitted to the notch step portion 15 outside the opening end portion 11.

  The lower surface of the cover plate portion 32 on the inner side of the fitting wall portion 31 is in contact with the upper end surface of the convex edge 14 of the opening end portion 11, that is, the upper end surface in a state of being attached to the container body 10. It is recessed so that it may exist in the position above the position of the notch step part 35. FIG. The depth of the recess on the lower surface of the lid plate portion 32 can also be set as appropriate in consideration of the strength of the fitting wall portion 31 and the like. However, in practice, for example, as shown in FIG. It is preferable that the depth of the same dimension as the width of the fitting wall portion 31 is recessed. In practice, it is formed in the same shape and depth as the recessed shape of the bottom surface of the bottom 12.

  The lid 30 has a notch 36 that fits into the convex residual portion 16 at the opening end 11 of the container body 10 at a part of the convex edge 34 of the fitting wall portion 31 on the short side. And a convex rib 33 that fits inside the opening end 11 when fitted to the opening end 11 of the container body 10 protrudes from the inside of the fitting wall 31 on the short side. ing. Thereby, in a state where the lid 30 is fitted and attached to the opening end 11 of the container body 10, the notch 36 in the convex edge 34 of the fitting wall 31 is protruded at the opening end 11. By fitting into the strip remaining portion 16, and further, the convex rib 33 is fitted inside the opening end portion 11, so that the air flow inside and outside the container at the location of the notch 36 can be blocked. ing.

  In addition, a fitting portion 37 having a phase-out shape with respect to the fitting peripheral wall 21 of the bottom surface of the bottom portion 12 of the container main body 10 is formed on the peripheral portion on the upper surface side of the lid body 30. That is, the fitting portion 37 is formed with a convex portion 38 and a notched step portion 39 corresponding to the notched step portion 25 and the convex edge 24 of the fitting peripheral wall 21, respectively. It can be fitted in a notch-shaped butted state. Furthermore, the upper surface of the lid plate portion 32 inward from the fitting portion 37 is formed higher than the fitting portion 37, and the fitting peripheral wall 21 of the bottom temporary surface of the container body 10 is fitted into the fitting portion 37. In the state, the upper surface side of the lid plate portion 32 is formed so as to fit into the recessed space inside the fitting peripheral wall 21. Further, a concave portion 43 corresponding to the convex rib 23 on the bottom lower surface of the container body 10 is formed on the upper surface of the lid body 30 between the fitting portion 37 on the short side and the lid plate portion 32. Has been. As a result, the lid 30 can be fitted to the bottom surface of the bottom of the container body 10 and used as a cradle.

  Further, the shape of the lower surface of the lid 30, that is, the fitting wall portion 31, the concave shape of the lower surface of the inner lid plate portion 32, and the convex rib 33 are the fitting peripheral wall of the bottom surface of the bottom portion 12 of the container body 10. 21, the concave shape of the bottom surface of the inner bottom portion 12 and the shape of the convex rib 23, and the shape corresponding to the shape of the upper surface of the lid body 30. For transportation, storage, etc. A plurality of the lid bodies 30 can be handled in a state of being fitted and stacked as shown in FIG.

  The cover plate 32 has a shape in which the protruding shape and the protruding height from the convex portion 38 on the upper surface side correspond to the concave shape on the bottom surface of the inner bottom portion 12 of the fitting peripheral wall 21 and the concave depth. It is formed so as to be approximately the same height.

  In the state where the fitting peripheral wall 21 of the container body 10 is fitted to the fitting part 37 and the lid plate part 32 is fitted to the inner part of the fitting peripheral wall 21 in the lid plate part 32. The upper surface of the lid plate portion 32 may be in contact with the lower surface of the bottom portion 12 so as not to create a gap. However, in practice, as shown in FIGS. It is preferable from the point of a heat insulation effect to provide so that the slight clearance 40 may be held between the lower surface of the bottom part 12 of this. If the gap 40 becomes too large, the effect of providing the gap will be reduced, so the gap 40 is at most 5 mm or less, preferably about 1 to 3 mm. Further, in order to retain the gap 40, the protruding height of the lid plate portion 32 is formed to be slightly lower than the recessed depth of the bottom temporary surface, or the lid plate portion 32 A shallow recess may be formed on the upper surface.

  In any case, when the container main body 10 is stacked, it is not attached to any part other than the uppermost stage, and therefore, the thickness of the cover plate part 32 does not need to be considered in the stacking height. It is possible to make the thickness thicker than the thickness of the conventional lid, and thereby the heat insulation of the lid 30 can be enhanced.

  Reference numeral 46 in the drawing is a convex portion provided at a position of the notch step portion 39 of the fitting portion 37, and when the fitting peripheral wall 21 is used by fitting to the bottom surface of the bottom of the container body 10. It is provided so as to fit into the notch 26 in the convex edge 24. When the lid body 30 is stacked, the convex portion 46 is also fitted into the notch 36 in the fitting wall portion 31 of the upper lid body 30.

  Examples of the foamed resin that is a constituent material of the container body 10 and the lid body 30 include styrene-modified polyolefin resin, polystyrene, high impact polystyrene, styrene-ethylene copolymer, styrene-maleic anhydride copolymer, styrene-acrylonitrile. Polystyrene resins such as copolymers, polyolefin resins such as polyethylene, polypropylene, and ethylene-vinyl acetate copolymers, and foams of various synthetic resins such as polyester resins such as polyethylene terephthalate can be used. Especially, the molded object by the bead foaming of a styrene modified polyolefin resin is used suitably. The styrene-modified polyolefin resin is obtained by impregnating and polymerizing a polyolefin resin particle with a styrene monomer. Among the styrene-modified polyolefin resins, a styrene-modified polyethylene resin is preferable, for example, a styrene component The ratio is 40 to 90% by weight, preferably 50 to 85% by weight, more preferably 55 to 75% by weight. The foaming ratio of the foam is preferably 10 to 70 times.

  The molded product of the styrene-modified polyolefin resin bead foam is stronger than the molded product of the polypropylene resin beads having the same expansion ratio, and the shrinkage rate when a container having a depth exceeding 500 mm is molded. Low dimensional accuracy. Furthermore, there is an advantage that powder due to rubbing is less likely to be produced as compared with foamed molded products of styrene resin beads. A non-foamed resin skin layer may be provided on the surface of the foamed resin.

  In the cold insulation container A made of the foamed resin, as illustrated in FIGS. 15 and 16, at least four corner portions of the fitting peripheral wall 21 on the bottom bottom surface of the container body 10 are made of polystyrene resin or polyolefin resin. It is possible to detachably attach a reinforcing material 60 made of an injection molded product or a vacuum molded product of a sheet made of a synthetic resin including a resin, other various synthetic resins, or synthetic resins including these recycled products. Thereby, at least the corner portion of the fitting peripheral wall 21 can be reinforced, and damage in use can be prevented. The reinforcing member 60 is not limited to the four corner portions of the fitting peripheral wall 21 but can be attached over the entire length of the fitting peripheral wall 21. The detachable mounting means for the reinforcing member 60 may be simply fitted to the fitting peripheral wall 21 by the elastic force of the resin itself. For example, as shown in FIG. It is preferable that the stopper portion 61 is provided and fitted and attached so that the locking portion 61 bites into the foamed resin.

  Moreover, it can implement by attaching to the fitting wall part 31 of the lower surface side peripheral part of the cover body 30 so that attachment of the same reinforcing material as the above is possible as needed.

  According to the cold storage container A of the above-described embodiment, each of the individual cold storage containers A is sorted and accommodated in the distribution center according to the order from the customer, and dry ice or cold storage is placed on the contents. A cold insulation material such as the material 50 is accommodated and delivered from the center to each door through a branch office. The contents of the cold insulation container A after the contents are accommodated are handled such as transporting and storing in the center, or a transport truck and delivery. At the time of transportation from the center to a branch by a commercial vehicle or delivery to a private home, the container body 10 is removed from the lower stage with the lid 30 not attached on the pallet truck B or the like, for example, as shown in FIG. The stacking is performed in such a manner that the fitting peripheral wall 21 on the lower surface of the bottom of the upper container body 10 is externally fitted to the opening end 11 of the lower container body 10. That is, as shown in the figure, the notched step 25 and the projecting edge 24 of the fitting peripheral wall 21 which are in the shape of a notch with the projecting edge 14 and the notched step 15 of the opening end 11 are respectively fitted. In this manner, the lid 30 is attached only to the uppermost container body 10.

  As a result, as shown in FIGS. 10, 11, and 12, the containers other than the uppermost container can be stacked with stability without attaching the lid 30. In addition, the stacking height of the containers is considerably lower than when stacking with the lid attached, or when stacking a large bottom wall as shown in FIG. Thus, it is possible to improve physical distribution efficiency such as container transportation, storage and transportation.

  In addition, the fitting peripheral wall 21 is configured to be fitted to the opening end 11 of the container body 10, and even if the upper end of the opening end 11 is used as a storage portion, dry ice or the like on the contents There is no possibility that the cold insulating material protrudes into the fitting portion between the fitting peripheral wall 21 and the opening end portion 11. In addition, the lower surface of the bottom portion 12 on the inner side of the fitting peripheral wall 21 of the upper container body 10 is recessed so as to be located above the upper end surface of the opening end portion 11 of the lower container body 10. Therefore, even if the cold insulator or the like protrudes slightly above the upper end of the side wall of the container body 10, the fitting operation can be easily performed without hindering the stacking and fitting, and the predetermined fitting can be performed. Can be stacked with stability in the combined state.

  Further, in the stacked state, the fitting peripheral wall 21 on the bottom surface of the bottom portion 12 of the container body 10 is externally fitted to the lower opening end 11, and further, the convex remaining portion 16 of the opening end 11 and Since the notched portion 16 of the fitting peripheral wall 21 is fitted, and the convex rib 23 provided on the bottom surface of the bottom portion 12 is fitted inside the opening end portion 11, the entire circumference is covered. Thus, the air flow inside and outside the container can be reliably blocked, and the cold state can be kept well.

  In the stacking, as shown in FIGS. 10 to 12, the lid 30 can be fitted under the lowermost container body 10 and used as a cradle. Thereby, the heat insulation of the bottom part 12 of the lowermost container main body 10 of a stacked state can be made high, and can be handled.

  In addition, the lid body 30 required according to the number of the container main bodies 10 is transported, stored and transported together with the container main body 10 in a state where the lid bodies 30 are fitted and stacked as shown in FIG. And when taking out from a delivery vehicle for every door and delivering to home, the fitting wall part 31 of the said cover 30 is fitted and attached to the opening edge part 11 of each said container main body 10. FIG.

In particular, when the delivery destination is not at home, the cold insulation container A is kept outdoors, and the cold insulation container A is provided with the fitting peripheral wall 21 provided on the bottom surface of the bottom 12 of the container body 10 as a support. By holding a space between the bottom 12 inside the fitting peripheral wall 21 and the ground, the radiant heat from the ground is not easily transmitted to the bottom 12 even at high temperatures in summer, and the bottom is As compared with the case where the container is placed directly on the ground, the cooling effect inside the container is kept good. Here, the fitting peripheral wall 21 has a notch 26, and a convex rib 23 having the same height as that of the fitting peripheral wall 21 protrudes from the notch 26. Inflow of air into the space between the bottom portion 12 and the ground is prevented, and the cooling effect inside the container is kept good.

  FIG. 14 shows a container in which a fitting peripheral wall 21 is provided on the bottom lower surface of the container main body 10 (Example product), and a container that does not have a fitting peripheral wall on the bottom lower surface and is placed directly on the ground (conventional product). The temperature change comparison of the goods in a container by the comparative test conducted about was shown.

  In this comparative test, the container of the example product and the container of the conventional product are substantially the same in the basic configuration mode of the container body, for example, the capacity, the opening size, the thickness of the side wall and the bottom portion, etc. As shown in the illustrated embodiment, a fitting peripheral wall is projected on the bottom surface of the bottom, and the conventional product has a flat surface that does not have a fitting peripheral wall on the bottom surface. Moreover, about the cover body, the example product shall be the form of the illustrated example, and the upper surface of the conventional product is a flat surface. And inside each container, 2.3 kg of ice cream frozen at −15 ° C. as frozen food is stored, and 900 g of dry ice is placed on the container, and the floor is closed in an atmosphere with an external temperature of 35 ° C. The temperature of the product (ice cream) on the bottom in the container was measured every hour, and the change in the product temperature was compared. The result is shown in FIG.

  According to this comparative test, in the case of the example product, the temperature of the product on the bottom did not decrease so much even though it contained dry ice, and became higher than −15 ° C. in about 4 hours from the start of the test. However, in the case of the example product, the temperature of the product on the bottom part was considerably lower than −15 ° C., and thereafter could be kept at −15 ° C. or lower until nearly 7 hours, and the cold insulation effect could be kept good.

  Therefore, the cold-reserving container A of the present invention is more effective than the conventional container without deteriorating the cold-retaining effect even in the case of ice cream or the like whose contents are desired to be kept at −15 ° C. or lower, or even at high temperatures in summer. It can be retained for a long time.

  In particular, when necessary, as shown by a chain line in FIG. 9, the lid 30 is fitted to the bottom surface of the container body 10 to be used as a cradle, and the bottom is a double wall, so that the overall thickness is large. By this, the heat insulation of a bottom part can further be improved, As a result, the retention for a long time is attained.

  The cold-reserving container of the present invention can be particularly preferably used for home delivery of products of a co-op.

It is a perspective view from the upper surface side of the state which isolate | separated the container main body and cover body of the cold storage container of the Example of this invention. It is a perspective view from the lower surface side of the isolation | separation state of the container main body and cover body of a cold storage container same as the above. It is a top view of a container main body. It is a bottom view of a container main body. It is a top view of a lid. It is a bottom view of a lid. It is a half longitudinal section front view of the separation state of a container main part and a lid. It is a half longitudinal section side view of the separation state of a container main part and a lid. It is sectional drawing of the use condition which adhered the cover body to the container main body. It is a schematic sectional drawing of the use condition which accumulated the container main body. It is an expanded sectional view which abbreviate | omitted a part same as the above. It is sectional drawing of the XII-XII line | wire of the previous figure. It is a schematic sectional drawing of the state which laminated | stacked the cover body. It is a diagram which shows the temperature change comparison of the goods in a container which shows the comparison of the cooling effect of the cold storage container of this invention, and the conventional container. It is a bottom view of the container main body which shows another Example. It is a partial expanded sectional view same as the above. It is a schematic sectional drawing of the use condition which accumulated the container main body of the conventional cold storage container.

Explanation of symbols

  A ... Cold container, 10 ... Container body, 11 ... Opening, 12 ... Bottom, 13a, 13b, 13c, 13d ... Side wall, 14 ... Convex edge, 15 ... Notch step, 16 ... Convex residue, 17 ... Handle Recessed part, 18 ... Step part, 21 ... Fitting peripheral wall, 23 ... Convex rib, 24 ... Convex edge, 25 ... Notch step part, 26 ... Notch part, 30 ... Cover body, 31 ... Fitting wall part, 32 ... Lid plate part, 33 ... Convex rib, 34 ... Convex edge, 35 ... Notch step part, 36 ... Notch part, 37 ... Fitting part, 38 ... Convex part, 39 ... Notch step part, 40 ... Clearance, 50 ... cool storage material, 60 ... reinforcement.

Claims (8)

A container made of a foamed resin comprising a container body having a flat rectangular shape that opens upward, and a lid that fits externally to the opening end of the upper end of the side wall of the container body,
On the bottom lower surface of the container main body, a fitting peripheral wall that is externally fitted to the opening end portion of the lower container main body when a plurality of container main bodies are stacked protrudes, and the bottom lower surface that is inward from the fitting peripheral wall, wherein Ri Na in the upper end surface of the opening end portion of the lower container body is recessed to be in the upper position during stacking,
The opening end of the container body is formed with a notch step on the outside leaving a convex edge on the inner side, and the fitting peripheral wall on the bottom lower surface has the convex edge of the opening end with respect to the opening end. And a notch step portion corresponding to each of the notch step portion and a convex edge, and provided so as to be fitted outside,
The inner bottom surface of the mating peripheral wall is recessed,
A concave portion for the handle portion is formed at the center of the outer surface of the opposite side wall on the short side of the container body, and the concave portion continues to the lower end portion and is one of the convex edges of the fitting peripheral wall on the bottom bottom surface. The portion is notched, and further fitted inside the opening peripheral portion of the lower container body when the container body is stacked, inside the fitting peripheral wall on the short side of the bottom lower surface, and the same height as the fitting peripheral wall A cold storage container for home delivery, characterized in that a convex rib is projected. An outer fit is formed on the lower surface side peripheral portion of the lid body by forming a notch step portion and a convex edge corresponding to the convex edge and the notch step portion of the opening end portion with respect to the opening end portion, respectively. A mating wall portion is formed so as to protrude, and the lower surface of the lid plate portion on the inner side of the fitting wall portion is located above the upper end surface of the opening end portion in the fitted state with respect to the container body. The cold-reserving container for home delivery according to claim 1 , wherein the container is recessed. The top surface side peripheral portion of the lid body has a notch formed by a convex portion and a notch step portion corresponding respectively to a notch step portion and a convex edge of the fitting peripheral wall with respect to the fitting peripheral wall of the bottom lower surface of the container body. In a state where a fitting portion having a shape is formed, an upper surface of the lid plate portion that is inward of the fitting portion is formed higher than the fitting portion, and the fitting peripheral wall of the container body is fitted to the fitting portion. The cold-reserving container for home delivery according to claim 2 , wherein the cover plate part is formed so as to be fitted to an inner part of the fitting peripheral wall. In a state where the lid plate portion is fitted to the inner portion of the fitting wall, according to claim 3 comprising provided to retain the gap between the bottom lower surface of the container body and the upper surface of the lid plate portion Cooling container for home delivery as described in 1. A convex residual portion that fits into a notch portion in a convex edge of a fitting peripheral wall of the bottom bottom surface is provided at a portion of a notch step portion at an opening end portion of an upper end of a side wall on the short side of the container body. The cold storage container for home delivery according to any one of 1 to 4 . The lid is provided with a notch portion that is fitted to the convex residual portion at the opening end portion of the container body at a part of the convex edge of the fitting wall portion on the short side, and the short side The cold-reserving container for home delivery according to claim 5 , wherein a convex rib that fits inside the opening end when the fitting is made to the opening end of the container body is provided on the inside of the fitting wall on the side. . The opposite side walls on the long side of the container body are thickened inward to form a thick wall, and the upper end on the inner surface side by thickening is formed as a stepped portion that receives the regenerator material at the opening end. The cool container for home delivery according to any one of claims 1 to 6 . The cold storage container for delivery according to any one of claims 1 to 7 , wherein a synthetic resin reinforcing agent is detachably attached to at least four corner portions of the fitting peripheral wall on the bottom lower surface of the container body. .

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