JPH06312769A - Warmth/coldness retaining container - Google Patents

Abstract

PURPOSE:To improve the heat insulating property, and, in addition, improve the strength of a container in attaching/detaching a lid by forming an easily formable double container which is suitable for the storage, preservation and carrying of a food requiring the retention of warmth or coldness, and improving the sealing property between two containers of the double container. CONSTITUTION:At the upper end of a peripheral wall 6 of an internal container 1, a flange 7 with a hanging piece is formed, and a tilted protuberance 13 is formed from the outer surface of the peripheral wall 6 toward a depressed part on the lower side of the flange 7, and a gap in which the upper end of a peripheral wall 16 of an external container 2 is fitted, is formed between the hanging piece and the tilted protuberance 13. Also, a small protuberance 11 to form a gap 12 which is wider than the above mentioned gap in the depressed part, is formed, and a protuberance for fastening 14 is formed at an upper part on the outside of the hanging piece, and a protuberance for fastening 18, which is vertically in contact with the protuberance for fastening 14, is formed at an upper part on the outside of the peripheral wall 16 of the external container 2. In addition, the internal container 1 and external container 2 are fitted, and a foamable resin 3 is filled in a gap between both containers to integrate both containers, and a fastening hole 21 which fastens with the above mentioned protuberances 14, 18 is formed on a hanging edge 20 being formed on the peripheral edge of a lid 4 which covers the double container.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a container for keeping heat and cold which is particularly suitable for storing, storing or transporting foodstuffs such as fresh food and frozen food which need to be kept warm or cold.

[0002]

2. Description of the Related Art An outer box made of thermoplastic resin is internally fitted with a slightly smaller inner box made of thermoplastic resin, and the space between both boxes is filled with a heat insulating material such as foamed synthetic resin to form an outer peripheral edge of both boxes. A double-structured container for keeping heat and cold, which is sealed by welding, for example, is known.

[0003]

In order to prevent the inner and outer containers from being partially deformed and the hermeticity of the double structure being impaired, the outer peripheral edge of such a container for heat insulation and cold insulation is welded. Alternatively, it is fixed with a screw, or is filled with a packing and sealed. For this reason, the molding workability of the container is poor,
There was room for improvement in molding efficiency. The present invention solves such a problem and provides a structure of a double container that is easy to mold, and also ensures a tight sealing property between the double containers and maintains good heat insulation. Further, the strength of the container with respect to attachment / detachment of the lid can be further improved to provide a container for keeping warm and cold.

[0004]

In order to solve the above-mentioned problems, the present invention forms a flange having an outer hanging piece at the upper end of the peripheral wall, and forms a recess on the lower side of the flange, and A configuration is provided in which an inclined protrusion having an outer edge that widens upward toward the inside of the recess is formed, and an outer container upper end fitting gap is formed between the hanging piece and the inclined protrusion in the recess. An inner container having the same, and a peripheral wall which can be fitted into the inner container and have a double-wall structure capable of maintaining a proper gap, and an upper end portion of the peripheral wall is formed so as to be capable of being fitted into the gap in the recess. The container for heat retention and cold storage is configured by forming a container body by combining with an outer container that has.

Further, according to the present invention, a small protrusion is formed in a middle portion of the recess formed in the flange, and a gap wider than the thickness of the upper end of the outer container is formed between the hanging piece and the small protrusion. It is also characterized by being formed.

Further, the present invention has a construction in which a flange having an outer hanging piece is formed at the upper edge of the peripheral wall, the lower side of the flange is made into a concave portion, and a locking projection is formed on an upper outer side of the hanging piece. It has an inner container and a peripheral wall that can be fitted in the inner container and has a double-wall structure that maintains an appropriate gap. A container body in which an outer container having a structure in which a locking protrusion that is vertically joined to the above-described locking protrusion of the inner container is formed in a double wall structure, and the outside of the hanging piece of the inner container on the outer periphery of the lid surface A drooping edge to be fitted to, and preferably the lower end of the drooping edge is formed to have an appropriate hem-spreading shape, and an engagement capable of engaging with the locking projection of the joined inner and outer containers in the drooping edge. It is also possible to form a container for keeping warm and cold by using a lid having a structure in which holes are formed. It is an feature.

[0007]

When the inner container and the outer container are fitted to each other, the upper end of the outer container is guided by the slanted projection on the outer surface of the inner container and naturally fits in the recess. The inclined projections serve as reinforcing ribs to form a stable double container. On the other hand, if a small protrusion is formed in the middle portion of the concave portion, a gap can be formed between the upper end of the fitted outer container and the small protrusion, and when the foamed resin is filled between the double containers, A foamed resin is filled in the gap to improve the hermeticity. On the other hand, if engaging projections are formed to join the upper part of the inner container and the upper part of the outer container, respectively, and this engaging hole is formed in the lid, it is possible to receive an external force due to the attaching / detaching operation of the lid. The stop projection and the upper part of both containers are less likely to be damaged.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a cross-sectional view showing a vertical half of a container according to an embodiment of the present invention, FIG. 2 is a partially cutaway front view of the same with a part thereof omitted, and FIG. 3 is an engaging structure of upper end portions of inner and outer containers. And FIG. 4 is a partial perspective view showing the engagement structure between the inner and outer containers and the lid.

The container for keeping warm and keeping cold is the inner container 1 made of a plastic resin.
And a plastic resin outer container 2 are fitted as a double container, and a foamed resin 3 is filled between the two containers to form a container body, and a plastic resin lid 4 is fitted and engaged. ing.

As shown in FIGS. 1 to 4, particularly FIGS. 3 and 4, the inner container 1 has a peripheral wall 6 of an appropriate height raised around a bottom surface 5 of an appropriate shape, and the upper edge of the peripheral wall 6 is formed. A flange 7 having a slightly wide horizontal piece 8 and a hanging piece 9 hanging down from its outer end with an appropriate length is continuously provided on the outer side of the, and a substantially downwardly U-shaped recess 10 is formed below the flange 7. A small protrusion 11 that is formed and hangs from the lower side of the horizontal piece 8 in the recess 10.
And a small protrusion 11 is formed between the hanging piece 9 and the small protrusion 11 so as to maintain a gap 12 wider than the wall thickness of the upper end of the peripheral wall of the outer container 2 described later. Further, an inclined protrusion 13 having an outer edge that widens upward is formed from the upper outer surface portion of the peripheral wall 6 toward the gap 12 in the recess 10. The outer edge of the upper end portion of the inclined protrusion 13 has the gap 1
It is formed in a substantially vertical shape so as to leave a gap 12a between the hanging piece 9 and the hanging piece 9 that substantially matches the thickness of the upper end of the peripheral wall of the outer container 2.

It is preferable that the flange 7 is formed over the entire circumference of the peripheral wall 6 and the small projection 11 is also formed over the entire circumference, but the inclined projection 13 is a vertical rib and is an outer surface of the peripheral wall 6. It suffices that protrusions are formed at appropriate intervals.

Further, as shown in FIGS. 1, 2 and 4, of the hanging pieces 9 of the inner container 1, one to three or more points may be provided, but it is preferable to face the upper outside of the hanging pieces 9 at two opposite positions. Then, the locking projection 14 having the downwardly inclined upper surface 14a and the horizontal lower surface 14b is formed, and the hanging piece portion below the locking projection 14 is cut off. In addition, it is preferable that the lower end edge of the hanging piece 9 has an appropriate thick edge and the lower end is substantially horizontal.

As shown in FIGS. 1 to 4, and particularly FIGS. 3 and 4, the outer container 2 has a peripheral wall 16 of a predetermined height raised around a bottom surface 15 of an appropriate shape, and the upper end of the peripheral wall is The ridge 1 is formed so as to be fitted into the gap 12a formed by the inclined projection 13 of the inner container 1 so as to abut against the lower surface of the flange 7, and to abut on the lower end of the hanging piece 9 of the flange 7.
7 is formed on the outer surface of the upper portion of the peripheral wall 16 so as to maintain a proper gap between the inner and outer containers 1 and 2 in the fitted state,
Moreover, the hanging piece 9 of the inner container 1 above the peripheral wall 16
The locking projection 18 having a joint upper surface 18a with the locking projection 14 is formed at a position directly below the locking projection 14 formed on the above, and the protrusions 17 are formed on both lower sides thereof. I am doing it.

The container for heat retention and cooling according to the present invention is such that when the inner and outer containers 1 and 2 are fitted together, an unfoamed resin such as polyurethane resin, polyethylene resin or polystyrene resin is interposed between the two containers, and the container is not fitted after fitting. It is formed by foaming a foamed resin and filling the gap between the two containers with the foamed resin.

To fit the two containers, for example, the outer container 2 is fitted in a lower mold (not shown), a predetermined amount of unfoamed resin is put therein, and then the inner container 1 is quickly fitted, and the inner container is fitted. Align the upper mold (not shown) in 1 and apply a predetermined pressure,
It is performed by heating at a predetermined temperature for a predetermined time to foam the unfoamed resin.

When the outer container 2 and the inner container 1 are fitted together, due to the existence of the inclined projections 13, if the inner container 1 is fitted, the upper end of the peripheral wall 16 of the outer container 2 becomes the gap 12 of the inner container 1.
It is smoothly guided by a and fits accurately, and the locking projection 1
The upper and lower portions 4 and 18 contact each other to form one locking projection, and the lower end of the hanging piece 9 and the protrusion 17 contact each other. The unfoamed resin is filled while being foamed between the two containers 1 and 2, and in particular, at the upper end portion, a gap 12 is formed between the small protrusion 11 and the upper end portion of the peripheral wall of the outer container 2. 12
The inside and outside containers 1 and 2 and the foamed resin 3 are integrally joined because the foamed resin is bitten into the small projections 11 at the same time as the inside is filled up and the joints at the upper ends of both containers 1 and 2 are closed. However, it does not cause rattling. Moreover, because of the small gap 12, sufficient sealing performance can be exhibited with a small expansion ratio.

The lid 4 is a lid surface 19 that covers the upper surface of the inner container 1.
A hanging edge 20 to be fitted on the outer side of the hanging piece 9 of the inner container 1 is formed, and a lower end portion of the hanging edge 20 is formed in an appropriate hem-spreading shape. An engaging hole 21 is formed in which the locking projections 14 and 18 of the inner and outer containers joined can be engaged, and a projecting piece 22 is hung from the lower surface of the lid surface 19 inside the hanging edge 20. Is formed so as to be fitted in the flange 7 portion of the inner container 1 in a sandwiched state, and the container bottom of the upper stage is placed and held near the upper peripheral edge of the lid surface 19 when the containers of the present invention are stacked in multiple stages. Possible projections 23 are provided in a protruding manner and other desired configurations are added.

The lid 4 is formed by integrating the inner and outer containers 1 and 2.
If it is fitted on the upper part of the, the hanging edge 20 of the lid 4 is fitted on the outside of the hanging piece 9 of the inner container 1, and the locking projections 14 and 18 are engaged and fixed in the engaging holes 21. . When fitted, the hanging edge 20
While it partially hits the hanging piece 9 and hits the inclined upper surface 14a of the locking projection 14 and rubs against them, the locking projection 14 folds downward from the flange 7 and hangs down. In addition to being integrally formed on the upper portion of the piece 9, since the locking projection 18 of the outer container 2 is joined to the lower side, the strength against the fitting pressure applied in the hanging direction becomes strong, The locking projections 14 and 18 and the hanging piece 9 are less likely to be deformed.

When removing the fitted lid 4, the lid 4 is lifted upward while the hanging edge 20 provided with the engagement hole 21 is slightly widened laterally. At this time, the engaging hole 21 abuts against the locking projection 18 and rubs against this, but in addition to the locking projection 18 being integrally formed on the upper portion of the peripheral wall 16 of the outer container 2 which is raised, Protrusion 1 for locking inner container 1
Since 4 is joined to the upper side, the strength against the detachment pressure applied in the rising direction becomes strong, and the locking projection 18
The deformation of the hanging pieces 9 and 14 and the deformation of the hanging pieces 9 can be made less likely to occur, and thus the deformation and damage of the container can be made less likely to occur even if the lid 4 is repeatedly fitted and removed.

If the inner side surface of the hanging piece 9 and the outer side surface of the upper end portion of the peripheral wall 16 joined to the hanging piece 9 are formed as a slightly uneven surface, the friction resistance is increased and the inner and outer containers 1, 2 are fitted together. The stability can be further improved. Also, the inner container 1
Of the bottom surface 5 to the peripheral wall 6 of the outer container 2, or the bottom surface 15 of the outer container 2 to the proper position of the peripheral wall 16 of the spacer projection, or a separate spacer projection in the gap between the inner and outer containers 1 and 2. By interposing, the gap between the double containers can be formed more accurately, and the container strength can be further increased. further,
A protrusion 24 for a handle as shown on a part of the peripheral wall 6 of the outer container 2.
The addition of a structure such as to form is optional.

[0021]

As described above, according to the container for keeping warm and cold according to the present invention, only by fitting the inner and outer containers 1 and 2 and foaming the foamed resin filled inside, the container is excellent in sealing property, lightweight and It is possible to manufacture a container having excellent heat insulating properties, and it is possible to easily and efficiently manufacture the container. An inclined projection is formed on the upper part of the inner container 1, and the hanging piece 9 of the flange 7 and the inclined projection 13 are formed.
An outer container upper end fitting gap 12a is formed between the outer container and the outer container, and the upper end of the peripheral wall 16 of the outer container 2 can be fitted into this gap 12a. Both containers can be fitted securely by maintaining a predetermined gap. Moreover, after fitting, the inclined projections serve as reinforcing ribs to form a stable double container.

Further, the concave portion 1 below the flange 7 of the inner container 1
The peripheral wall 1 of the outer container 2 in which the small protrusion 11 is formed in
6 By forming a slight gap with the upper end part, when the foamed resin is filled between the double containers, this gap part is filled with the foamed resin, and an adhesive or a fixed part is used. Even if it does not exist, the space between the double containers can be surely sealed, and the foamed resin can be spread over the entire space between the double containers, so that a container having excellent heat insulating properties can be obtained.

Further, locking projections 14 and 18 are provided on the upper portions of the inner and outer containers 1 and 2 so as to be joined to each other, and these projections cover the lid 4.
By engaging with the engaging hole 21 of the above, even if the lid 4 is repeatedly attached and detached, the fitting edge portion is liable to be deformed or damaged, and the lid 4 is easily attached and detached. It can be a stable container.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a vertical half of a container according to an embodiment of the present invention, in which a foamed resin is omitted.

FIG. 2 is a partial front view in which a cut portion of FIG. 1 is a front surface and a part is shown in a cross section.

FIG. 3 is a partial cross-sectional view showing the engagement structure of the upper ends of the inner and outer containers.

FIG. 4 is a partial perspective view showing an engagement structure between the inner and outer containers and the lid.

[Explanation of symbols]

 1 Inner container 2 Outer container 3 Foam resin 4 Lid body 5,15 Bottom surface 6,16 Peripheral wall 7 Flange 8 Horizontal piece 9 Hanging piece 10 Recessed portion 11 Small protrusion 12 Gap 12a Gap 13 Inclined protrusion 14, 18 Locking protrusion 17 Protrusion Article

Claims (3)

[Claims] 1. A flange 7 having a hanging piece 9 is formed on an upper end portion of a peripheral wall 6, and a recess 10 is formed below the flange 7.
An inclined projection 13 having an outer edge that widens upward from the outer surface of the peripheral wall 6 toward the inside of the recess 10 is formed, and an upper end portion of the outer container is formed between the hanging piece 9 and the inclined projection 13 in the recess 10. An inner container 1 having a structure in which a fitting gap 12a is formed, and a peripheral wall 16 that can be fitted in the inner container 1 and have a double-wall structure capable of maintaining an appropriate gap, are provided. A container for keeping warm and cold, which comprises a container body formed by combining with an outer container 2 having a structure that can be fitted into the gap 12a in the recess 10. 2. A small protrusion 11 is formed in the intermediate portion of the recess 10 formed in the flange 7 so as to be wider than the thickness of the upper end portion of the outer container 2 between the hanging piece 9 and the small protrusion 11. The heat-retaining container according to claim 1, wherein the gap 12 is formed. 3. A flange 7 having a hanging piece 9 is formed on the upper edge of the peripheral wall 6, and a recess 10 is formed below the flange 7.
An inner container 1 having a structure in which a locking projection 14 is formed on an outer upper portion of the hanging piece 9, and a peripheral wall 16 that can be fitted to the inner container 1 to form a double wall structure with an appropriate gap maintained, The upper end of the peripheral wall 16 is formed so as to be fittable in the recess 10,
In addition, the locking projection 14 of the inner container 1 is provided on the outer upper portion of the peripheral wall 16.
The outer container 2 having a structure in which a locking projection 18 that is vertically joined with the outer container 2 is fitted in a double wall structure, and the outer surface of the hanging piece 9 of the inner container 1 on the outer periphery of the lid surface 19. An engaging hole 21 is formed in which a hanging edge 20 to be fitted is formed, and the engaging projections 14 and 18 of the joined inner and outer containers can be engaged in the hanging edge 20.
A container for keeping heat and cold, which comprises a lid 4 having a structure formed by forming.