JP2005015054A - Thermally insulated container - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a thermally insulated container reduced in man-hour and material in manufacture while maintaining strength of the lower end of a sheathing member. <P>SOLUTION: The thermally insulated container comprises a container body 1 having a bottomed cylindrical form and the sheathing member 2 made of an expanded resin sheet S having a heat-shrinking property and covering the circumferential wall 10 of the container body 1, and is provided with a space 40 formed between the circumferential wall 10 and the sheathing member 2. The sheathing member 2 has a cylindrical portion 20 opposing to the circumferential wall 10 of the container body 1 and an annular portion 21 extended inside the cylindrical portion 20 from the edge portion of the lower end opening of the cylindrical portion 20 as a base end, while the annular portion 21 has its front end side extended further away from the inner circumferential face of the cylindrical portion 20 than its base end side. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  In the present invention, a bottomed cylindrical container main body that contains a container such as a high-temperature food or beverage is covered with an exterior body, and a space is formed between the exterior body and the peripheral wall of the container body to provide a heat insulation effect. The present invention relates to an insulated container configured to obtain.

  Conventionally, various heat insulating containers have been provided as containers for storing instant foods such as soup and noodles that are poured and poured with hot water, and beverages that are separately heated.

  As such a heat insulating container, as shown in FIG. 14, a container main body 100 formed into a bottomed cylindrical shape and an exterior body 150 covering the peripheral wall 101 of the container main body 100 are provided, and the peripheral wall 101 and the exterior body 150 of the container main body 100 are provided. The space 200 is formed between the outer wall 150 and the heat of the accommodation P accommodated in the container main body 100 is not easily transmitted to the exterior body 150 through the space 200.

  The outer package 150 includes a cylindrical portion 151 that faces the peripheral wall 101 of the container body 100, and a horizontal annular portion that extends toward the center of the cylindrical portion 151 with the lower end of the cylindrical portion 151 as a base end. 152.

  The exterior body 150 (the cylindrical portion 151 and the horizontal annular portion 152) is heated by externally fitting a heat-shrinkable foamed resin sheet (not shown) in a substantially cylindrical shape (not shown). And it is shape | molded by the said form by shrinking the said foamed resin sheet.

  By the way, since the exterior body 150 having the above-described configuration is formed with the horizontal annular portion 152, when an external force in the radial direction is applied to the lower end side of the tubular portion 151 by gripping or the like, the horizontal annular portion 152 is against the external force. This is countered by the strength in the cross section (cross section intersecting the direction of the external force), that is, the buckling strength of the horizontal annular portion 152 in the direction orthogonal to the thickness direction of the horizontal annular portion 152.

  However, when an external force is applied as described above, the external force concentrates on the inner peripheral edge of the horizontal annular portion 152, and buckling occurs in the inner peripheral edge, causing the horizontal annular portion 152 to move to the inner side or the outer side. There is a case where it is bent or broken, and there is a problem that the radial strength at the lower end side of the exterior body 150 cannot be sufficiently obtained only by the buckling strength of the horizontal annular portion 152.

  Therefore, in such a heat insulating container, the bottom plate 160 is attached to the inner surface of the horizontal annular portion 152 by heat sealing so as to close the hole 153 formed in the horizontal annular portion 152 of the exterior body 150, and the external force applied in the radial direction is horizontally applied. It is received by the annular portion 152 and the bottom plate 160 to prevent the external force from acting locally, and to obtain the strength in the radial direction on the lower end side of the exterior body 150 (heat insulating container).

  However, in the heat insulating container having the above-described configuration, the bottom plate 160 is forced to be adhered so as to close the hole 153 formed in the horizontal annular portion 152 of the exterior body 150 in order to ensure the strength of the lower end side of the exterior body 150. In manufacturing, there has been a problem that the manufacturing cost and the material cost are increased.

  Then, in view of such a situation, this invention makes it a subject to provide the heat insulation container which can reduce the man-hour in manufacture, and material, fully ensuring the intensity | strength of the lower end side of an exterior body.

  The heat-insulating container according to the present invention has been made to solve the above-mentioned problem, and is formed from a bottomed cylindrical container body and a heat-shrinkable foamed resin sheet as described in claim 1, and the container A heat insulating container including an outer body covering a peripheral wall of the main body, and forming a space between the peripheral wall and the outer body, wherein the outer body includes a cylindrical part facing the peripheral wall of the container main body, and the cylindrical part An annular portion extending from the lower end opening edge to the inside of the cylindrical portion, and the annular portion is spaced from the inner peripheral surface of the cylindrical portion at the distal end side compared to the proximal end side. It is characterized by becoming.

  According to the heat insulating container having the above configuration, the annular portion is formed so that the distal end side is separated from the inner peripheral surface of the tubular portion as compared with the proximal end side, and therefore toward the center with respect to the tubular portion. When an external force acts, the external force does not act in a direction orthogonal to the cross section of the annular portion (buckling direction in the annular portion), but acts in a direction crossing the annular portion.

  Then, the external force acts to bend (bend) the annular portion, and an elastic force is generated in the annular portion by the bending action. Therefore, the elasticity (elastic force) of the annular portion can counter external forces, and the strength of the lower end portion of the cylindrical portion in which the proximal end of the annular portion is continuously provided can be increased. Further, the external force is absorbed by the bending action (elasticity) in the annular portion, and the external force is not concentrated on the tip (inner peripheral edge) or the base end (outer peripheral edge) of the annular portion, and is caused by buckling of the annular portion. Deformation and breakage can be prevented.

  Therefore, the strength in the radial direction of the heat insulating container can be sufficiently obtained at the annular portion without providing a bottom plate that closes the hole formed at the annular portion as in the prior art. Moreover, the process of attaching a bottom plate at the time of manufacture is not required by this, and material cost and manufacturing cost can be reduced.

  Further, according to a second aspect of the present invention, the exterior body may further include a horizontal annular portion that extends toward the center of the cylindrical portion at the tip of the annular portion. As described above, when a bending action occurs in the annular part, the elastic force also acts to expand the opening (inner peripheral edge) on the distal end side of the annular part. By increasing the strength of the tip end portion of the annular portion, it is possible to restrict deformation of the tip end of the annular portion, and to efficiently disperse and absorb external force in the circumferential direction of the annular portion. Thereby, the intensity | strength of the lower end side of a cylindrical part (exterior body) can be increased further.

  According to a third aspect of the present invention, the annular portion is formed so that the tip thereof is spaced from the bottom of the container body, and the gas in the space is configured to be able to flow outside from the lower end opening of the cylindrical portion. It is preferable.

  In this way, even when high-temperature items are stored in the container body, even if the air in the space between the peripheral wall of the container body and the cylindrical portion is heated via the peripheral wall of the container body, the heat insulation is performed. By lifting (separating) the container from the placement surface, air convection is generated in the space through the lower end opening of the cylindrical portion (external air having a lower temperature than the air in the space is generated in the space). The air in the space is released to the outside while flowing into the air), and the space can be cooled. Therefore, even if a high-temperature container is stored in the heat insulating container for a long time, it is possible to prevent the cylindrical portion of the exterior body from being heated by the air in the space, which is even better as a heat insulating container. Can be.

  As described above, according to the heat insulating container according to the present invention, the container body includes a bottomed cylindrical container body and an exterior body that is molded from a heat-shrinkable foamed resin sheet and covers the peripheral wall of the container body, In the heat insulating container in which a space is formed between the peripheral wall and the exterior body, the exterior body includes a cylindrical portion facing the peripheral wall of the container body, and a cylindrical portion with a lower end opening edge of the cylindrical portion as a base end. An annular portion extending inside, and the annular portion has a distal end side that is separated from the inner peripheral surface of the tubular portion as compared with the proximal end side, so that the strength on the lower end side of the exterior body is sufficiently high It is possible to achieve an excellent effect that man-hours and materials in manufacturing can be reduced.

  Hereinafter, the heat insulation container concerning 1st embodiment of this invention is demonstrated, referring an accompanying drawing.

  As shown in FIG. 1, the heat insulating container according to the present embodiment includes a bottomed cylindrical container body 1 and an exterior body 2 that covers a peripheral wall 10 of the container body 1.

  The container body 1 is a resin molded product molded by a molding method such as injection molding, blow molding, vacuum molding, or pressure air molding. The container body 1 is formed in a cylindrical shape so that the diameter of the peripheral wall 10 decreases toward the lower end side. The container body 1 has an annular connecting portion 11 at the upper end of the peripheral wall 10 extending outward, and the outer peripheral edge of the connecting portion 11 having a U-shaped cross section opened downward. The lower end of the piece 12a on the inner peripheral side of the portion 12 is connected.

  On the outer peripheral piece 12b of the flange portion 12, a plurality of engaging convex portions 13 bulging toward the inner peripheral piece 12a are formed at predetermined intervals in the circumferential direction.

  The exterior body 2 is formed from a heat-shrinkable foamed resin sheet, and has a cylindrical portion 20 that covers the peripheral wall 10 so as to face the peripheral wall 10 of the container body 1, and a lower end of the cylindrical portion 20. And an annular portion 21 extending (folded) toward the inside of the cylindrical portion 20. In addition, the process of shape | molding the exterior body 2 using the said foamed resin sheet is mentioned later.

  A curled portion 22 that is curled outward is formed at the upper end portion of the cylindrical portion 20. The curled portion 22 is fitted into the flange portion 12 of the container body 1 and is shaped so as to engage with the engaging convex portion 13 in that state.

  The annular portion 21 is formed so that the tip end side (inner peripheral edge side) is separated from the inner peripheral surface of the cylindrical portion 20. Specifically, the annular portion 21 is formed in a taper shape such that the distal end (inner peripheral edge) is positioned on the inner side of the tubular portion 20 from the proximal end (outer peripheral edge) and tapers toward the distal end side. In addition, it is preferable to set the inclination | tilt angle of the annular part 21 with respect to the internal peripheral surface of the cylindrical part 20 to 30 degrees-60 degrees.

  A horizontal annular portion 23 extends toward the center of the tubular portion 20 at the inner peripheral edge of the annular portion 21.

  In the heat insulating container having the above-described configuration, the container body 1 is fitted into the exterior body 2 so that the inner peripheral surface of the cylindrical portion 20 and the outer peripheral surface of the peripheral wall 10 of the container main body 1 face each other. A space 40 is formed between the peripheral wall 10 of the container main body 1 and the cylindrical portion 20 of the exterior body 2 by fitting the portion 22 to the flange portion 12 of the container main body 1.

  Further, in this state, as shown in FIG. 3, the tip of the annular portion 21 and the inner surface of the horizontal annular portion 23 are spaced from the bottom portion 14 of the container body 1, and the space 40 is formed in the annular portion 21. The tip and the horizontal annular portion 23 and the bottom portion 14 of the container body 1 are in communication with each other through the hole formed in the annular portion 21 and the lower end opening of the tubular portion 20.

  When the outer casing 2 grips the outer casing 2 and a radial external force is applied to the outer casing 2 (lower end), the outer force is directed toward the center of the cylindrical section 20 (the cylindrical section 20). Acting in a direction perpendicular to the center line of the cylindrical portion 20, and acts to deform the lower end opening edge of the cylindrical portion 20 into a reduced diameter or a flat shape. At the same time, the external force acts on the base end (outer peripheral edge) of the annular portion 21 toward the center of the tubular portion 20.

  Then, since the annular portion 21 is formed in an annular shape that tapers toward the inner side of the tubular portion 20, an external force acts in a direction intersecting the surface of the annular portion 21, and the distal end side of the annular portion 21. In this case, a reaction force in a direction in which the direction of action is different from the external force (the direction in which the inner peripheral edge is expanded) is generated. As a result, a bending action is generated between the base end and the distal end of the annular portion 21, and the elastic force generated in the annular portion 21 due to the bending prevents the cylindrical portion 20 from being deformed in the radial direction by an external force. .

  That is, the heat insulating container is formed with a tapered shape so that the annular portion 21 extends to the inner side of the cylindrical portion 20 and the distal end side is separated from the inner peripheral surface of the cylindrical portion 20. At this time, an elastic force is generated in the annular portion 21 and the strength in the radial direction at the lower end portion of the exterior body 2 can be sufficiently obtained by utilizing the elasticity.

  Moreover, the said heat insulation container extends the horizontal annular part 23 at the front-end | tip of the cyclic | annular part 21, strengthens the intensity | strength of the annular part 21 vicinity, and the inner peripheral part vicinity of the annular part 21 deform | transforms with the reaction force with respect to an external force. It is possible to obtain a greater radial strength. In other words, the strength of the lower end side of the tubular portion 20 is further increased by effectively utilizing the elasticity between the base end and the distal end of the annular portion 21 against the external force.

  Furthermore, a gap is formed between the tip of the annular portion 21 of the outer package 2 and the inner surface of the horizontal annular portion 23 and the bottom portion 14 of the container body 1 (the tip of the annular portion 21 is spaced from the bottom portion 14 of the container body 1). By forming the annular portion 21 so as to have a heated food or the like stored in the container body 1 and the air in the space 40 is heated, if it is lifted from the mounting surface on which the heat insulating container is mounted Then, convection of air occurs in the space 40 (external air having a lower temperature flows into the heated air in the space 40 from the lower end opening of the exterior body 2).

  Therefore, the temperature rise in the space 40 can be suppressed, the heat of the air in the space 40 can be prevented from being transmitted to the exterior body 2, and the function as a heat insulating container can be further improved. .

  Moreover, the said heat insulation container has comprised the cyclic | annular part 21 toward the inside from the lower end of the cylindrical part 20 in the inclined state with respect to the internal peripheral surface, and has comprised the aspect by which the recessed part was formed in the bottom. Therefore, the heat insulating container can be held with the finger placed on the annular portion 21. Therefore, the heat insulating container can be gripped in a stable state without sliding off. Even when the heat insulating container is held with the finger placed on the annular portion 21 as described above, the horizontal annular portion 23 extends from the inner peripheral edge (tip) of the annular portion 21, so The finger does not touch the bottom 14 of the container body 1, and even when hot food or the like is put in the container body 1, it does not cause a situation such as a burn and is safe.

  Next, the process of manufacturing the exterior body 2 having the above configuration will be described. When manufacturing the exterior body 2, as shown in FIG. 4, a mold 50 that forms the cylindrical portion 20 of the exterior body 2, a press die 51 that molds the annular portion 21 and the horizontal annular portion 23, and the exterior body 2 A band-shaped foamed resin sheet S to be molded (in the figure, a cylindrical shape) is prepared in advance. Note that the process of forming the curled portion 22 is omitted, and the mold 50, the press mold 51, and the foamed resin sheet S will be described prior to the description of the manufacturing process for the exterior body 2.

  The mold 50 is formed in a truncated conical shape with a small outer diameter from one end to the other end corresponding to the shape of the cylindrical portion 20. Here, the truncated right conical shape refers to a shape obtained by cutting a right conical tip portion in a direction perpendicular to the center. The mold 50 has a concave portion 52 into which the press die 51 is fitted on the other end surface set to a small diameter, and an annular convex portion 53 whose upper end is substantially horizontal at the outer peripheral edge portion of the other end surface. ing. The inner peripheral surface of the annular convex portion 53 is formed in a taper shape, and the angle formed by the outer peripheral surface of the mold 50 and the inner peripheral surface of the annular convex portion 53 is an annular shape with respect to the tubular portion 20 of the exterior body 2. The angle corresponding to the inclination angle of the portion 21 is set.

  The press die 51 includes a convex portion 54 that fits into the concave portion 52. The convex portion 54 is formed in a frustoconical shape corresponding to the shape of the inner peripheral surface of the annular convex portion 53.

  The foamed resin sheet S is set so that the length in the short direction is longer than the length from one end to the other end of the mold 50, and characters and designs on one surface that becomes the outer surface when the exterior body 2 is molded. A sheet made of expanded polystyrene having a heat shrinkability and having an expansion ratio of 2 to 10 times (preferably 2.5 to 7 times) is used. The foamed resin sheet S has heat shrinkability in one direction (longitudinal direction).

  Examples of the expanded polystyrene constituting the expanded resin sheet S include those obtained by foaming general-purpose polystyrene with various foaming agents, and copolymers obtained by copolymerizing polystyrene with butadiene, acrylonitrile, methacrylic acid, acrylic acid, acrylic esters, and the like. A material obtained by foaming with 50% by weight (preferably 70% or more) of the styrene component as a main component by various foaming agents can be employed. In addition, the thickness of the foamed resin sheet S is 0.1 to 1.0 mm, preferably 0.2 to 0.5 mm.

  In order to manufacture the exterior body 2 using the mold 50 and the press mold 51 having the above-described configuration, first, both ends in the longitudinal direction of the foamed resin sheet S having the above-described configuration are bonded to form a cylinder. In this state, the foamed resin sheet S can be thermally contracted in the circumferential direction (toward the center). The thermal shrinkage rate of the foamed resin sheet S is measured by, for example, the shrinkage rate when immersed in oil at a predetermined temperature for 10 seconds, and the circumferential direction of the foamed resin sheet S formed into a cylindrical shape in the present embodiment. The heat shrinkage rate is 5% or less at 80 ° C. and 30 to 60% at 110 ° C.

  Then, the one end of the mold 50 is aligned with the one end opening edge of the cylindrical foamed resin sheet S, and the cylindrical foamed resin sheet S is externally fitted so as to cover the outer peripheral surface of the mold 50. In this state, as shown in FIG. 5A, the other end opening edge of the cylindrical foamed resin sheet S is located outside the other end of the mold 50.

  Then, when the foamed resin sheet S is heated with hot air A or the like, the foamed resin sheet S has a heat shrinkability, so that the diameter is reduced in the center direction and is in close contact with the outer peripheral surface of the mold 50. Will be formed. When the foamed resin sheet S (especially the other end portion) is further heated, as shown in FIG. 5B, the other end portion contracts toward the center and falls in the axial direction of the mold 50 to form a horizontal annular shape. Will do.

  In this state, the heating is stopped, and the other end portion of the foamed resin sheet S forming the horizontal ring is pressed by the press die 51 as shown in FIG. In this press state, heating to the foamed resin sheet S is stopped, but the foamed resin sheet S is softened by the heating so far, so that the foamed resin sheet S as shown in FIG. The other end portion of the sheet S is smoothly pushed into the concave portion 52 of the die 50 by the convex portion 54 of the press die 51 with the upper end portion of the annular convex portion 53 as a bending fulcrum.

  Then, a tapered annular portion 21 is formed with one end (lower end) of the cylindrical portion 20 as a base end corresponding to the outer peripheral shape of the press die 51. At the same time, the contraction force acts on the other end side of the annular portion 21 toward the center, so that the cylindrical portion 20 (the concave portion 52 of the mold 50) is placed inside the cylindrical portion 20 while maintaining the horizontal annular shape. The horizontal annular portion 23 is formed by being pressed down. In this state, by separating the press die 51 from the die 50 and removing the die 50, the exterior body 2 having the above-described configuration is formed from the foamed resin sheet S having a cylindrical shape.

  Therefore, as described above, when manufacturing the exterior body 2 that can sufficiently obtain the strength of the lower end side of the heat insulating container (the exterior body 2), a step of providing a bottom plate that closes the hole formed by the annular portion as in the prior art. Therefore, it is possible to reduce the manufacturing cost and material cost for manufacturing the heat insulating container.

  Next, the heat insulation container concerning 2nd embodiment of this invention is demonstrated. In addition, in this embodiment, about the structure which is the same as that of 1st embodiment, or equivalent, it shall attach | subject the same name and 1st code | symbol as 1st embodiment.

  As shown in FIGS. 6 and 7, the heat insulating container according to this embodiment includes a bottomed cylindrical container body 1 and an exterior body 2 that covers the peripheral wall 10 of the container body 1. It consists of

  The container body 1 is a resin molded product formed by injection molding using polypropylene, high density polyethylene or the like as a material. The container body 1 includes a cylindrical peripheral wall 10 and a bottom portion 14 that closes a lower end opening of the peripheral wall 10.

  The peripheral wall 10 is formed in an inverted conical cylinder shape so that the diameter becomes smaller toward the lower end side. Specifically, the peripheral wall 10 is set to have a cylindrical upper peripheral wall portion 10a that forms an opening of the heat insulating container and a diameter smaller than the upper peripheral wall portion 10a, and is formed below the upper peripheral wall portion 10a. The lower peripheral wall portion 10b includes an annular connection portion 5 that connects the lower end opening edge portion of the upper peripheral wall portion 10a and the upper end opening edge portion of the lower peripheral wall portion 10b.

  The upper peripheral wall portion 10 a has a cylindrical peripheral wall main body portion 110 having a lower end opening edge portion connected to an outer peripheral edge portion of the connection portion 5, and an inner peripheral edge portion connected to an upper end opening edge portion of the peripheral wall main body portion 110. A horizontal annular connecting portion 111, a cylindrical large-diameter portion 112 having a lower end opening edge connected to an outer peripheral edge of the annular connecting portion 111, and an outer side from the upper end opening edge of the large-diameter portion 112 And a flange portion 113 extending toward the end.

  The peripheral wall main body 110 is formed in an inverted conical cylinder shape so that the outer diameter and the inner diameter become smaller toward the lower end side. The peripheral wall main body 110 is formed by alternately forming a plurality of concave stripes 110a extending in the axial direction and a plurality of convex stripes 110b in the circumferential direction.

  The surface of the concave stripe 110a forms a concave curved surface in the circumferential direction, and the surface of the convex stripe 110b forms a convex curved surface in the circumferential direction. Thereby, the outer peripheral surface of the surrounding wall main-body part 110 has comprised the wavy curved surface in which the concave curved surface and the convex curved surface were formed alternately.

  In other words, the cross-section of the ridge 110b has a gentle chevron shape, and the ridge 110a is formed by a connecting portion between the ridges 110b. In the present embodiment, the concave stripe 110a is formed with an interval of a predetermined angle (about 7.5 ° in the present embodiment) in the circumferential direction around the axis of the peripheral wall main body 110. Therefore, also about the some protruding item | line 110b, the vertex of adjacent protruding item | line 110b via the recessed item | line 110a is a space | interval of predetermined angle (7.5 degrees in this embodiment) centering on the axis line of the surrounding wall main-body part 110. In the circumferential direction.

  A reinforcing piece 117 for increasing the radial strength of the container body 1 is suspended from the lower end of the peripheral wall body 110 according to the present embodiment. The reinforcing pieces 117 are provided at a predetermined interval on the outer peripheral surface of the lower peripheral wall portion 10b (lower cylindrical portion 114 described later), and both side ends are connected to vertical ribs 115 described later.

As described above, the outer peripheral edge portion of the annular connecting portion 111 is connected to the upper end opening edge portion of the peripheral wall main body portion 110, and is formed in a bowl shape with respect to the peripheral wall main body portion 110.
The large diameter portion 112 has a substantially true cylindrical shape, and a lower end opening edge portion is connected to an outer peripheral edge portion of the annular connection portion 111. Thereby, the large diameter portion 112, the annular connecting portion 111, and the peripheral wall main body portion 110 form a step near the upper end opening of the upper peripheral wall portion 10a (container main body 1). The upper surface can be used as an entry line that serves as a guideline for the amount of hot water poured.

  The flange portion 113 includes a horizontal annular top plate portion 113a and a hanging portion 113b suspended from the outer peripheral edge of the top plate portion 113a, and has a substantially L-shaped cross section. The flange portion 113 is connected to the inner peripheral edge of the top plate portion 113a at the upper end opening edge of the large diameter portion 112, whereby the top surface of the top plate portion 113a is connected to the upper end surface of the heat insulating container. Is configured. The flange portion 113 has a sealing lid (not shown) in which an aluminum foil and a laminate material such as a synthetic resin film or paper are laminated on the top plate portion 113a so as to be peeled off, and the contents (for example, hot water) The container body 1 in which instant noodles and soup that can be eaten by pouring are contained is sealed.

  The lower peripheral wall portion 10b has a lower cylindrical portion 114 whose upper end opening edge is connected to the upper peripheral wall portion 10a via the connecting portion 5 and extends vertically on the outer peripheral surface of the lower cylindrical portion 114. It comprises a plurality of vertical ribs 115 protruding.

  The lower cylindrical portion 114 is formed in an inverted conical cylindrical shape (a cylindrical shape forming an inverted truncated cone shape) so that an outer diameter and an inner diameter become smaller toward the lower end side. The lower cylindrical portion 114 according to the present embodiment includes a thick cylindrical portion 114a on the upper end opening side connected to the connection portion 5 and the thick cylindrical portion 114a in consideration of the flow of resin during molding. And a thin cylindrical portion 114b connected to the lower end opening edge.

  Since the lower cylindrical portion 114 is connected to the upper peripheral wall portion 10a via the connecting portion 5 as described above, the thick cylindrical portion 114a has an outer diameter of the upper opening edge of the connecting portion 5. Since it is interposed, it is smaller in diameter than the inner diameter of the lower end opening of the upper peripheral wall portion 10a (the peripheral wall main body portion 110), and is formed in an inverted conical cylinder shape having a smaller diameter toward the lower end side.

  The thin-walled cylindrical portion 114b is connected at its upper end opening edge to the lower-end opening edge of the thick-walled cylindrical portion 114a so as to form a substantially uniform continuous surface with the inner peripheral surface of the thick-walled cylindrical portion 114a. ing. The thickness of the thin cylindrical portion 114b is set to be thinner than the thickness of the thick cylindrical portion 114a. In the present embodiment, the thickness is set to about 0.2 mm to 0.4 mm. The thin cylindrical portion 114b also has a substantially inverted conical cylindrical shape so as to have a smaller diameter toward the lower end side, similarly to the thick cylindrical portion 114a.

  The plurality of vertical ribs 115 are provided radially on the outer peripheral surface of the lower cylindrical portion 114 around the axis of the lower peripheral wall portion 10b. That is, the plurality of vertical ribs 115 are provided radially about the axis of the lower cylindrical portion 114 so as to straddle the thick cylindrical portion 114a and the thin cylindrical portion 114b. The vertical rib 115 according to the present embodiment has an upper end connected to the lower surface of the connection portion 5, and the amount of protrusion gradually decreases from the upper end of the lower cylindrical portion 114 toward the lower end side.

  The vertical rib 115 according to the present embodiment has a protrusion amount in the vicinity of the connection portion between the thick cylindrical portion 114a and the thin cylindrical portion 114b of about 1.5 mm to 2. mm based on the outer peripheral surface of the thin cylindrical portion 114b. The thickness of the portion connected to the thin cylindrical portion 114b is set to about 0.6 to 0.7 mm. Thereby, as for the container main body 1 concerning this embodiment, the outer peripheral surface of the surrounding wall main-body part 110, the front-end | tip of the vertical rib 115, and the outer surface of the bottom part 14 are formed continuously. When the vertical rib 115 is set to the above dimensions, the thick cylindrical portion 114a is about 0.3 mm thick on the assumption that the thick cylindrical portion 114a is thicker than the thin cylindrical portion 114b. It is preferable to set the length of the axial center to about 1 mm to 10 mm while setting to ~ 0.8 mm.

  The bottom portion 14 includes a bottom plate portion 14a having a circular shape in plan view, and a bottom connection portion 14b that connects the bottom plate portion 14a to a lower end opening edge portion of the thin cylindrical portion 114b (the peripheral wall 10). The bottom plate portion 14 a is formed such that a substantially circular region at the center is slightly bulged on the inner side of the container body 1.

  The bottom connection portion 14b is formed in an annular shape, and one surface constituting the inner surface of the container body 1 forms a concave curved surface, and the other surface constituting the outer surface of the container body 1 is a convex curved surface. It is formed to make. The bottom connection portion 14b has an inner peripheral end edge connected to the outer peripheral edge of the bottom plate portion 14a, and constitutes a substantially dish-shaped bottom portion 14 together with the bottom plate portion 14a. The outer peripheral edge portion of the bottom connection portion 14b is connected to the lower end opening edge portion of the lower cylindrical portion 114 (the peripheral wall 10).

  Similarly to the first embodiment, the outer package 2 is formed from a heat-shrinkable foamed resin sheet, and a cylindrical portion 20 that covers the peripheral wall 10 so as to face the peripheral wall 10 of the container body 1. And an annular portion 21 extending (turned back) toward the inside of the tubular portion 20 with the lower end of the tubular portion 20 as a base end.

  The cylindrical portion 20 has a predetermined interval with respect to the peripheral wall 10 of the container body 1 (strictly speaking, the outer peripheral surface of the peripheral wall main body portion 110 and the tip of the vertical rib 115 on the outer peripheral surface of the lower peripheral wall portion 10b). In the present embodiment, the inner diameter is set so that it can be externally fitted to the peripheral wall 10 of the container body 1. In this embodiment, it is formed in an inverted conical cylinder shape corresponding to the peripheral wall 10 of the container body 1. .

  Unlike the first embodiment, the upper end opening of the cylindrical portion 20 according to the present embodiment is not provided with the curled portion 22 and is formed in a substantially true cylindrical shape. The upper end opening of the cylindrical portion 20 is set to an inner diameter that can be fitted to the large diameter portion 112 of the container body 1.

  The annular portion 21 is formed so that the tip end side (inner peripheral edge side) is separated from the inner peripheral surface of the cylindrical portion 20. Specifically, the annular portion 21 is formed in a taper shape such that the distal end (inner peripheral edge) is positioned on the inner side of the tubular portion 20 from the proximal end (outer peripheral edge) and tapers toward the distal end side. In addition, it is preferable to set the inclination | tilt angle of the annular part 21 with respect to the internal peripheral surface of the cylindrical part 20 to 30 degrees-60 degrees. A horizontal annular portion 23 extends toward the center of the tubular portion 20 at the inner peripheral edge of the annular portion 21. In addition, since this exterior body 2 is produced by the process similar to said 1st embodiment, it omits about the process of producing this exterior body 2.

  In the heat insulating container having the above-described configuration, the container body 1 is fitted into the exterior body 2 so that the inner peripheral surface of the cylindrical portion 20 and the outer peripheral surface of the peripheral wall 10 of the container main body 1 face each other. When the upper end of the cylindrical portion 20 is brought into contact with the lower surface of the top plate portion 113a in a state where the upper end opening of the body 2 (cylindrical portion 20) is externally fitted to the large diameter portion 112 of the container body 1, FIG. As shown, the bottom portion 14 (bottom plate portion 14a) is in contact with and supported by the horizontal annular portion 23. Thereby, by pouring hot water into the container main body 1, the bottom 14 (bottom plate portion 14a) formed into a thin wall is softened and can be prevented from being deformed so as to bend downward due to the weight of the hot water or the contents. It is like that. Further, in this state, a space 40 is formed between the peripheral wall 10 (the peripheral wall main body portion 110 and the lower cylindrical portion 114) of the container main body 1 and the cylindrical portion 20 of the exterior body 2, and heat air A heat insulation effect can be obtained by conduction (see FIG. 7).

  According to the heat insulating container having the above configuration, when a radial external force is applied to the exterior body 2 (lower end portion) by gripping the exterior body 2, the external force is directed toward the center of the tubular portion 20 (tubular shape). Acting in a direction orthogonal to the center line of the portion 20, and acting to deform the lower end opening edge of the tubular portion 20 into a reduced diameter or flat shape. At the same time, the external force acts on the base end (outer peripheral edge) of the annular portion 21 toward the center of the tubular portion 20.

  Then, since the annular portion 21 is formed in an annular shape that tapers toward the inner side of the tubular portion 20, an external force acts in a direction intersecting the surface of the annular portion 21, and the distal end side of the annular portion 21. In this case, a reaction force in a direction in which the direction of action is different from the external force (the direction in which the inner peripheral edge is expanded) is generated. As a result, a bending action is generated between the base end and the distal end of the annular portion 21, and the elastic force generated in the annular portion 21 due to the bending prevents the cylindrical portion 20 from being deformed in the radial direction by an external force. .

  That is, the heat insulating container is formed with a tapered shape so that the annular portion 21 extends to the inner side of the cylindrical portion 20 and the distal end side is separated from the inner peripheral surface of the cylindrical portion 20. At this time, an elastic force is generated in the annular portion 21 and the strength in the radial direction at the lower end portion of the exterior body 2 can be sufficiently obtained by utilizing the elasticity.

  Further, the heat insulating container extends a horizontal annular portion 23 at the tip of the annular portion 21 to strengthen the strength in the vicinity of the inner peripheral edge of the annular portion 21, and the vicinity of the inner peripheral edge of the annular portion 21 is deformed by a reaction force against an external force. It is possible to obtain a greater radial strength. In other words, the strength of the lower end side of the tubular portion 20 is further increased by effectively utilizing the elasticity between the base end and the distal end of the annular portion 21 against the external force. Therefore, when manufacturing the exterior body 2 that can sufficiently obtain the strength of the lower end side of the heat insulating container (the exterior body 2), there is no need to provide a step of providing a bottom plate that closes the hole formed by the annular portion as in the prior art. The manufacturing cost and material cost for manufacturing the heat insulating container can be reduced.

  Moreover, the said heat insulation container has made the aspect by which the recessed part was formed in the bottom by the annular part 21 extending toward the inside from the lower end of the cylindrical part 20 in the inclined state with respect to the internal peripheral surface. Therefore, the heat insulating container can be held with the finger placed on the annular portion 21. Therefore, the heat insulating container can be gripped in a stable state without sliding off. Even when the heat insulating container is held with the finger placed on the annular portion 21 as described above, the horizontal annular portion 23 extends from the inner peripheral edge (tip) of the annular portion 21, so The finger does not touch the bottom 14 of the container body 1, and even when hot food or the like is put in the container body 1, it does not cause a situation such as a burn and is safe.

  In addition, since the plurality of vertical ribs 115 are provided on the lower peripheral wall portion 10b constituting the peripheral wall 10 of the container body 1, when the exterior body 2 is gripped, the exterior body 2 is radially moved by the action of the gripping force. Even if it deform | transforms, it will be in the aspect which contacted the vertical rib 115, the space 40 is always formed between the lower surrounding wall part 10b and the exterior body 2, and the heat insulation effect can always be maintained by the heat conduction in this space 40.

  Further, the heat insulating container according to the present embodiment has a rounded connection part (bottom connection part 14b) between the peripheral wall 10 and the bottom part 14 of the container body 1, and prevents interference with the exterior body 2. The part 14a can be made into the aspect supported by the horizontal annular part 23, and the intensity | strength of the said heat insulation container can be made still stronger.

  Moreover, since the inner peripheral surface (inner surface of the bottom connection part 14b) of the bottom part 14 of the container main body 1 is a concave curved surface, it can be accommodated by keeping the front-end | tip part of a spoon along the inner peripheral surface of the bottom part 14. Can be easily scooped without leaving in the container body 1.

  Next, the heat insulation container concerning 3rd embodiment of this invention is demonstrated. About the heat insulation container concerning this embodiment, about the same composition as the composition concerning the 1st and 2nd embodiments in this embodiment, or the equivalent composition similarly to the 1st and 2nd embodiments. Are given the same name and the same reference numerals as the first embodiment.

  As shown in FIGS. 10 and 11, the heat insulating container according to the present embodiment covers the bottomed cylindrical container body 1 and the peripheral wall 10 of the container body 1 as in the first and second embodiments. It is comprised with the exterior body 2. FIG.

  The container body 1 is a resin molded product formed by injection molding using polypropylene, high density polyethylene or the like as a material. The container body 1 includes a cylindrical peripheral wall 10 and a bottom portion 14 that closes a lower end opening of the peripheral wall 10.

  The peripheral wall 10 is formed in an inverted conical cylinder shape so that the diameter becomes smaller toward the lower end side. Specifically, the peripheral wall 10 is set to have a cylindrical upper peripheral wall portion 10a that forms an opening of the heat insulating container and a diameter smaller than the upper peripheral wall portion 10a, and is formed below the upper peripheral wall portion 10a. The lower peripheral wall portion 10b and the annular connection portion 5 that connects the lower end opening edge portion of the upper peripheral wall portion 10a and the upper end opening edge portion of the lower peripheral wall portion 10b.

  The upper peripheral wall portion 10 a has a cylindrical peripheral wall main body portion 110 having a lower end opening edge portion connected to an outer peripheral edge portion of the connection portion 5, and an inner peripheral edge portion connected to an upper end opening edge portion of the peripheral wall main body portion 110. A horizontal annular connecting portion 111, a cylindrical large-diameter portion 112 having a lower end opening edge connected to an outer peripheral edge of the annular connecting portion 111, and an outer side from the upper end opening edge of the large-diameter portion 112 And a flange portion 113 extending toward the end.

  The peripheral wall main body 110 according to the present embodiment is set to have a substantially uniform wall thickness in the circumferential direction and the axial direction, is set to have a smaller diameter toward the lower end side, and has an inverted conical cylindrical shape. Is connected to the outer peripheral edge of the connecting portion 5. A reinforcing piece 117 for increasing the strength in the radial direction of the container body 1 is suspended from the lower end of the peripheral wall body 110. The reinforcing pieces 117 are provided on the outer peripheral surface of the lower peripheral wall portion 10b with a predetermined interval, and both side ends are connected to vertical ribs 115 described later.

As described above, the outer peripheral edge portion of the annular connecting portion 111 is connected to the upper end opening edge portion of the peripheral wall main body portion 110, and is formed in a bowl shape with respect to the peripheral wall main body portion 110.
The large diameter portion 112 has a substantially true cylindrical shape, and a lower end opening edge portion is connected to an outer peripheral edge portion of the annular connection portion 111. Thereby, the large diameter portion 112, the annular connecting portion 111, and the peripheral wall main body portion 110 form a step near the upper end opening of the upper peripheral wall portion 10a (container main body 1). The upper surface can be used as an entry line that serves as a guideline for the amount of hot water poured.

  The flange portion 113 includes a horizontal annular top plate portion 113a and a hanging portion 113b suspended from the outer peripheral edge of the top plate portion 113a, and has a substantially L-shaped cross section. The flange portion 113 is connected to the inner peripheral edge of the top plate portion 113a at the upper end opening edge of the large diameter portion 112, whereby the top surface of the top plate portion 113a is connected to the upper end surface of the heat insulating container. Is configured. The flange portion 113 has a sealing lid (not shown) in which an aluminum foil and a laminate material such as a synthetic resin film or paper are laminated on the top plate portion 113a so as to be peeled off, and the contents (for example, hot water) The container body 1 in which instant noodles and soup that can be eaten by pouring are contained is sealed.

  The lower peripheral wall portion 10 b has an upper end opening edge portion connected to the upper peripheral wall portion 10 a via the connection portion 5, and a lower end opening closed by the bottom portion 14. The lower peripheral wall portion 10b is formed in an inverted conical cylindrical shape (a cylindrical shape forming an inverted frustoconical shape) so that an outer diameter and an inner diameter become smaller toward the lower end side. The lower peripheral wall portion 10b according to the present embodiment is thick on the upper end opening side connected to the connection portion 5 in consideration of the flow of resin during molding, similarly to the lower cylindrical portion 114 according to the second embodiment. It is comprised by the cylindrical part 114a and the thin cylindrical part 114b connected with the lower end opening edge part of this thick cylindrical part 114a, and it is formed in the reverse cone cylindrical shape as a whole.

  Since the lower peripheral wall portion 10b is connected to the upper peripheral wall portion 10a via the connection portion 5 as described above, the thick-walled cylindrical portion 114a has an outer diameter of the upper end opening edge portion interposed between the connection portions 5. Accordingly, it is smaller in diameter than the inner diameter of the lower end opening of the upper peripheral wall portion 10a (peripheral wall body portion 110), and is formed in an inverted conical cylindrical shape having a smaller diameter toward the lower end side.

  The thin-walled cylindrical portion 114b is connected at its upper end opening edge to the lower-end opening edge of the thick-walled cylindrical portion 114a so as to form a substantially uniform continuous surface with the inner peripheral surface of the thick-walled cylindrical portion 114a. ing. The thickness of the thin cylindrical portion 114b is set to be thinner than the thickness of the thick cylindrical portion 114a. In the present embodiment, the thickness is set to about 0.2 mm to 0.4 mm. The thin cylindrical portion 114b also has a substantially inverted conical cylindrical shape so as to have a smaller diameter toward the lower end side, similarly to the thick cylindrical portion 114a.

  On the outer peripheral surface of the peripheral wall 10 of the container body 1 having the above-described configuration, a plurality of vertical ribs 115 are provided radially about the axis of the container body 1 so as to straddle the peripheral wall body portion 110 and the lower peripheral wall portion 10b. ing. The upper ends of the plurality of vertical ribs 115 are connected to the lower surface of the annular connecting portion 111, and the tip on the upper end side is continuous with the outer peripheral surface of the large diameter portion 112 (the tip is more than the outer peripheral surface of the large diameter portion 112. And also protrudes downward from the reinforcing piece 117 and extends downward. Further, the protruding amount on the other end side of the vertical rib 115 gradually decreases toward the lower end, and the tip is continuous with the outer surface of the bottom portion 14 (bottom connection portion 14b) described later. It is formed to become. The vertical rib 115 according to the present embodiment has a protrusion amount in the vicinity of the connection portion between the thick cylindrical portion 114a and the thin cylindrical portion 114b of about 1.5 mm to 2. mm based on the outer peripheral surface of the thin cylindrical portion 114b. The thickness of the portion connected to the thin cylindrical portion 114b is set to about 0.6 to 0.7 mm. Thereby, as for the container main body 1 concerning this embodiment, the outer peripheral surface of the surrounding wall main-body part 110, the front-end | tip of the vertical rib 115, and the outer surface with the bottom part 14 are located on a continuous surface. In addition, when the said vertical rib 115 is set to the said dimension, similarly to 2nd embodiment, the said thick cylindrical part 114a assumes that it is thicker than the thickness of the thin cylindrical part 114b. The wall thickness is preferably set to about 0.3 mm to 0.8 mm, and the axial length is preferably set to about 1 mm to 10 mm.

  The bottom portion 14 includes a bottom plate portion 14a having a circular shape in plan view, and a bottom connection portion 14b that connects the bottom plate portion 14a to a lower end opening edge portion of the thin cylindrical portion 114b (the peripheral wall 10). The bottom plate portion 14 a is formed such that a substantially circular region at the center is slightly bulged on the inner side of the container body 1.

  The bottom connection portion 14b is formed in an annular shape, and one surface constituting the inner surface of the container body 1 forms a concave curved surface, and the other surface constituting the outer surface of the container body 1 is a convex curved surface. It is formed to make. The bottom connection portion 14b has an inner peripheral end edge connected to the outer peripheral edge of the bottom plate portion 14a, and constitutes a substantially dish-shaped bottom portion 14 together with the bottom plate portion 14a. The outer peripheral edge portion of the bottom connection portion 14b is connected to the lower end opening edge portion of the lower peripheral wall portion 10b (the peripheral wall 10).

  As in the first and second embodiments, the exterior body 2 is formed from a heat-shrinkable foamed resin sheet and covers the peripheral wall 10 so as to face the peripheral wall 10 of the container body 1. A cylindrical portion 20, and an annular portion 21 extending (turned back) toward the inside of the cylindrical portion 20 with the lower end of the cylindrical portion 20 as a base end.

  The cylindrical portion 20 has a predetermined interval with respect to the peripheral wall 10 of the container body 1 (strictly speaking, the outer peripheral surface of the peripheral wall main body portion 110 and the tip of the vertical rib 115 on the outer peripheral surface of the lower peripheral wall portion 10b). In the present embodiment, the inner diameter is set so that it can be externally fitted to the peripheral wall 10 of the container body 1. In this embodiment, it is formed in an inverted conical cylinder shape corresponding to the peripheral wall 10 of the container body 1. .

  Unlike the first embodiment, the cylindrical portion 20 according to the present embodiment is not provided with the curled portion 22 at the upper end opening, and is formed in a substantially true cylindrical shape. The upper end opening of the cylindrical portion 20 is set to an inner diameter that can be fitted to the large diameter portion 112 of the container body 1.

  As in the first and second embodiments, the annular portion 21 has a distal end (inner peripheral edge) positioned on the inner side of the tubular portion 20 with respect to the proximal end (outer peripheral edge), and is tapered toward the distal end side. It is formed in a taper shape. In addition, since this exterior body 2 is produced by the process similar to said 1st and 2nd embodiment, the process which produces this exterior body 2 is omitted.

  In the heat insulating container having the above configuration, the container body 1 is fitted into the exterior body 2 so that the inner peripheral surface of the cylindrical portion 20 and the outer peripheral surface of the peripheral wall 10 of the container main body 1 face each other. When the upper end of the cylindrical portion 20 is brought into contact with the lower surface of the top plate portion 113a in a state where the upper end opening of the body 2 (cylindrical portion 20) is externally fitted to the large diameter portion 112 of the container body 1, FIG. As shown, the bottom portion 14 (bottom plate portion 14a) is in contact with and supported by the horizontal annular portion 23. Thereby, by pouring hot water into the container main body 1, the bottom 14 (bottom plate portion 14a) formed into a thin wall is softened and can be prevented from being deformed so as to bend downward due to the weight of the hot water or the contents. It is like that. In this state, a space 40 is formed between the peripheral wall 10 (the peripheral wall main body portion 110 and the lower peripheral wall portion 10b) of the container main body 1 and the cylindrical portion 20 of the exterior body 2, and air conduction of heat In this way, a heat insulating effect can be obtained (see FIG. 7).

  According to the heat insulating container having the above configuration, when a radial external force is applied to the exterior body 2 (lower end portion) by gripping the exterior body 2, the external force is directed toward the center of the tubular portion 20 (tubular shape). Acting in a direction orthogonal to the center line of the portion 20, and acting to deform the lower end opening edge of the tubular portion 20 into a reduced diameter or flat shape. At the same time, the external force acts on the base end (outer peripheral edge) of the annular portion 21 toward the center of the tubular portion 20.

  Then, since the annular portion 21 is formed in an annular shape that tapers toward the inner side of the tubular portion 20, an external force acts in a direction intersecting the surface of the annular portion 21, and the distal end side of the annular portion 21. In this case, a reaction force in a direction in which the direction of action is different from the external force (the direction in which the inner peripheral edge is expanded) is generated. As a result, a bending action is generated between the base end and the distal end of the annular portion 21, and the elastic force generated in the annular portion 21 due to the bending prevents the cylindrical portion 20 from being deformed in the radial direction by an external force. .

  That is, the heat insulating container is formed with a tapered shape so that the annular portion 21 extends to the inner side of the cylindrical portion 20 and the distal end side is separated from the inner peripheral surface of the cylindrical portion 20. At this time, an elastic force is generated in the annular portion 21 and the strength in the radial direction at the lower end portion of the exterior body 2 can be sufficiently obtained by utilizing the elasticity.

  Further, the heat insulating container extends a horizontal annular portion 23 at the tip of the annular portion 21 to strengthen the strength in the vicinity of the inner peripheral edge of the annular portion 21, and the vicinity of the inner peripheral edge of the annular portion 21 is deformed by a reaction force against an external force. It is possible to obtain a greater radial strength. In other words, the strength of the lower end side of the tubular portion 20 is further increased by effectively utilizing the elasticity between the base end and the distal end of the annular portion 21 against the external force. Therefore, also in the heat insulating container according to the present embodiment, when manufacturing the exterior body 2, it is not necessary to provide a process for providing a bottom plate that closes the hole formed by the annular portion as in the related art, and manufacturing the heat insulating container according to the manufacturing process. Costs and material costs can be reduced.

  Moreover, the said heat insulation container has made the aspect by which the recessed part was formed in the bottom by the annular part 21 extending toward the inside from the lower end of the cylindrical part 20 in the inclined state with respect to the internal peripheral surface. Therefore, the heat insulating container can be held with the finger placed on the annular portion 21. Therefore, the heat insulating container can be gripped in a stable state without sliding off. Even when the heat insulating container is held with the finger placed on the annular portion 21 as described above, the horizontal annular portion 23 extends from the inner peripheral edge (tip) of the annular portion 21, so The finger does not touch the bottom 14 of the container body 1, and even when hot food or the like is put in the container body 1, it does not cause a situation such as a burn and is safe.

  Moreover, the heat insulation container concerning this embodiment gives roundness to the connection part (bottom connection part 14b) of the surrounding wall 10 and the bottom part 14 of the container main body 1, and interference with the cylindrical part 20 of the exterior body 2 is prevented. Therefore, only the bottom plate portion 14a can be supported by the horizontal annular portion 23, and the strength of the heat insulating container can be further increased.

  Furthermore, since the heat insulating container is provided with a plurality of vertical ribs 115 over substantially the entire area of the peripheral wall 10 of the container body 1, when the exterior body 2 is gripped, the exterior body 2 is applied by the action of the gripping force. Is deformed in the radial direction, it comes into contact with the tip of the vertical rib 115, and a space 40 is always formed over substantially the entire region between the peripheral wall 10 and the exterior body 2, and heat conduction in the space 40 The thermal insulation effect can always be maintained.

  Moreover, since the inner surface of the inner peripheral surface (bottom connection portion 14b) of the bottom portion 14 of the container body 1 is a concave curved surface as in the second embodiment, the tip of the spoon is the inner peripheral surface of the bottom portion 14. The container can be easily scooped without leaving the contents in the container body 1.

  In addition, the heat insulation container of this invention is not limited to said 1st thru | or 3rd embodiment, Of course, a various change can be added in the range which does not deviate from the summary of this invention.

  In the first to third embodiments, the foamed resin sheet S for molding the exterior body 2 is composed of a single foam polystyrene sheet, but the foamed resin sheet S for molding the exterior body 2 is limited to this. For example, a foamed polystyrene layer having a non-foamed resin layer formed on one side or both sides thereof may be employed.

  In this case, the expansion ratio and components of the expanded polystyrene layer are configured in the same manner as the expanded polystyrene sheet of the above embodiment. In addition, as the non-foamed resin layer, a styrene resin such as polystyrene, styrene, butadiene copolymer, styrene / acrylic acid copolymer, or a mixture thereof, or a resin such as polyethylene or ethylene vinyl acetate copolymer is mixed. Styrene resin is preferable, but polyethylene, polypropylene resin, and the like can also be used. The thickness of the non-foamed resin layer is preferably about 3 to 30 μm. The non-foamed resin layer may be formed by coextrusion with the foamed resin sheet, or may be formed by laminating a separately formed film. In this case, printing can be performed on the non-foamed resin film.

  In addition, as the foamed resin sheet (foamed layer), the one made of the above-mentioned polystyrene resin is preferable because of excellent heat insulation and rigidity, but a foamed layer such as polypropylene resin or polyethylene resin and non-foamed heat-shrinkable polyester. A film and a laminate can also be used.

  In the above embodiment, the horizontal annular portion 23 is extended at the tip (inner peripheral edge) of the annular portion 21, but is not limited to this, and the radial strength of the tubular portion 20 is obtained only by the annular portion 21. You may do it.

  In the first to third embodiments, the cylindrical portion 20 of the exterior body 2 has a diameter set smaller toward the lower end side. However, the present invention is not limited to this. For example, the cylindrical portion 20 is Of course, a cylindrical shape, a rectangular tube shape, or the like may be used.

  In said 1st thru | or 3rd embodiment, although the exterior body 2 was shape | molded using the type | mold 50 and the press die 51 of the said structure which formed the cyclic | annular convex part 53 in the other end surface, the said type | mold 50 is formed in a cylinder shape. It may be. That is, the mold 50 may have any configuration that has an outer peripheral surface that forms the cylindrical portion 20 and that can press the other end portion of the externally fitted cylindrical foamed resin sheet S with the press die 51.

  Further, as in the first to third embodiments, the annular convex portion 53 is not limited to one formed so as to correspond to the inclination angle between the inner peripheral surface of the tubular portion 20 and the annular portion 21. Absent. That is, since the exterior body 2 is formed by the foamed resin sheet S having heat shrinkability, when pressing with the press die 51, due to the contraction force toward the central direction acting on the cylindrical foamed resin sheet, The annular portion 21 conforming to the outer peripheral shape of the convex portion 54 can be formed. Therefore, since the annular portion 21 is not formed by the inner peripheral surface of the annular convex portion 53, if the convex portion 54 of the press die 51 is accurately formed, the annular portion corresponding to the outer peripheral surface of the convex portion 54 is formed. 21 can be molded.

  In said 2nd and 3rd embodiment, although the reinforcement piece 117 was provided in the lower end edge part of the surrounding wall main-body part 110, and the intensity | strength of the radial direction in the surrounding wall 10 of the container main body 1 was raised, it is limited to this. Instead, for example, the peripheral wall 10 may be formed in a step shape to increase the strength in the radial direction. Even if it does in this way, since the said heat insulation container is equipped with the exterior body 2, the holding force at the time of holding does not act on the container main body 1 directly, but has sufficient intensity | strength. However, in view of safety and the like, it is preferable to provide the reinforcing piece 117 as in the second and third embodiments.

  In the second and third embodiments, the bottom portion 14 (bottom plate portion 14a) of the container body 1 is brought into contact with the horizontal annular portion 23 of the exterior body 2 to support the container body 1. However, the present invention is limited to this. Instead, as in the first embodiment, a gap is formed between the horizontal annular portion 23 and the bottom plate portion 14a, and between the peripheral wall 10 of the container body 1 and the cylindrical portion 20 of the exterior body 2. Of course, air may be allowed to flow outside.

  In the second and third embodiments described above, the upper surface of the annular connecting portion 111 is used as an entry line for pouring hot water. However, the present invention is not limited to this. A ridge extending in the direction may be provided, and this ridge may be used as a line of sight. However, the entry line is not necessarily provided, and may be appropriately provided according to the contents.

  In the second and third embodiments, the peripheral wall 10 is formed in a stepped shape. However, the present invention is not limited to this, and the peripheral wall 10 is formed in a substantially cylindrical shape without providing a step from the upper end to the lower end. Alternatively, it may be formed in an inverted conical cylindrical shape. Even if the peripheral wall 10 is configured in this way, if the vertical rib 115 is provided so as to extend from the upper end portion to the lower end portion of the peripheral wall 10, the exterior body 2 can be grasped by gripping similarly to the second and third embodiments. Even if the deformation is deformed, the peripheral wall 10 and the exterior body 2 (cylindrical portion 20) are not in close contact with each other due to the presence of the vertical rib 115, and a space that promotes heat insulation can be always formed in the region where the vertical rib 115 exists. And a heat insulating effect can be obtained.

  In the first embodiment, the annular portion 21 is provided so that the tip of the annular portion 21 is spaced from the bottom portion 14 of the container body 1 so that the air in the space 40 can be discharged to the outside. Without being limited thereto, the bottom portion 14 of the container body 1 may be supported by the tip of the annular portion 21. That is, since the cylindrical part 20 (exterior body 2) is formed of a foamed resin, a sufficient heat insulating effect can be obtained without releasing the air in the space 40 to the outside. It is not necessary to make the inside air releasable to the outside, and it is sufficient to obtain the necessary heat insulation effect in consideration of the contents to be accommodated in the container body 1 and the like.

  In the second embodiment, the peripheral wall body portion 110 of the upper peripheral wall portion 10a is configured by alternately forming the plurality of concave stripes 110a and the convex stripes 110b, but is not limited thereto. Of course, the peripheral wall main body 110 may be set to a uniform thickness. However, when the container body 1 of the heat insulating container is molded, in order to efficiently mold the peripheral wall body 110 with a stable quality, it is constituted by the concave stripes 110a and the convex stripes 110b as in the second embodiment. It is preferable. Therefore, although it shape | molded so that the thickness of the surrounding wall 10 of the container main body 1 in 1st embodiment might become substantially equal, it is not limited to this, The surrounding wall 10 of this container main body 1 is applied to 2nd embodiment. Of course, like the peripheral wall body 110, the peripheral wall 10 may be configured by alternately forming a plurality of concave stripes and convex stripes.

  In the second embodiment, the vertical rib 115 is provided on the lower peripheral wall portion 10b of the container main body 1. However, the present invention is not limited to this, and substantially the entire area of the peripheral wall 10 of the container main body 1 as in the third embodiment. Vertical ribs 115 may be provided on the surface. That is, when the vertical rib 115 is provided, it may be provided on at least one of the peripheral wall main body portion 110 and the lower peripheral wall portion 10b, preferably at least the lower peripheral wall portion 10b. However, it is not always necessary to provide the vertical ribs 115 on the peripheral wall 10 of the container body 1, and it is of course possible to form the wall thickness of the peripheral wall 10 of the container body 1 substantially uniformly as in the first embodiment.

The side view including the partial cross section of the heat insulation container concerning 1st embodiment of this invention is shown. The partial cross section figure of the upper end part of the heat insulation container concerning 1st embodiment is shown. The partial cross section figure of the lower end part of the heat insulation container concerning 1st embodiment is shown. The whole perspective view of the type | mold and press die | die for shape | molding the exterior body concerning 1st embodiment is shown. BRIEF DESCRIPTION OF THE DRAWINGS It is explanatory drawing of the shaping | molding process of the exterior body concerning 1st embodiment, Comprising: (a) shows the state by which the foamed resin sheet was externally fitted and heated by the type | mold, and the cylindrical part was formed, (b) Shows the state where the other end portion of the foamed resin sheet is in a horizontal ring shape due to heating, and (C) shows the state where the other end portion of the foamed resin sheet in a horizontal ring shape is pressed with a press die. ) Shows a state in which the annular portion and the horizontal annular portion are formed by a die and a press die. The front view of the heat insulation container concerning 2nd embodiment of this invention is shown. The longitudinal cross-sectional view in the heat insulation container concerning 2nd embodiment is shown. The partial cross-section enlarged view of the flange part vicinity in the heat insulation container concerning 2nd embodiment is shown. The partial cross-sectional enlarged view in the bottom part vicinity in the heat insulation container concerning 2nd embodiment is shown. The front view of the heat insulation container concerning 3rd embodiment of this invention is shown. The longitudinal cross-sectional view in the heat insulation container concerning 3rd embodiment is shown. The partial cross-section enlarged view of the flange part vicinity in the heat insulation container concerning 3rd embodiment is shown. The partial cross-section enlarged view in the bottom part vicinity in the heat insulation container concerning 3rd embodiment is shown. The side view containing the partial cross section of the conventional heat insulation container is shown.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Container main body, 2 ... Exterior body, 5 ... Connection part, 10 ... Peripheral wall, 10a ... Upper peripheral wall part, 10b ... Lower peripheral wall part, 11 ... Connection part, 12 ... Flange part, 12a, 12b ... Piece, 13 ... Engagement Joint convex part, 14 ... bottom part, 14a ... bottom plate part, 14b ... bottom connection part, 20 ... cylindrical part, 21 ... annular part, 22 ... curl part, 23 ... horizontal annular part, 40 ... space, 50 ... mold, 51 DESCRIPTION OF SYMBOLS ... Press type | mold, 52 ... Concave part, 53 ... Annular convex part, 54 ... Convex part, 100a ... Convex part, 100b ... Convex part, 110 ... Perimeter wall main-body part, 111 ... Annular connection part, 112 ... Large diameter part, 113 ... Flange 113a ... top plate part, 113b ... hanging part, 114 ... lower cylindrical part, 114a ... thick cylindrical part, 114b ... thin cylindrical part, 115 ... vertical rib, 117 ... reinforcing piece

Claims (3)

  In a heat-insulated container formed of a bottomed cylindrical container body and a heat-shrinkable foamed resin sheet, and an exterior body that covers the peripheral wall of the container body, and a space is formed between the peripheral wall and the exterior body The exterior body includes a cylindrical portion facing the peripheral wall of the container body, and an annular portion extending inside the cylindrical portion with the lower end opening edge of the cylindrical portion as a base end. The heat insulating container is characterized in that the portion is formed such that the distal end side is separated from the inner peripheral surface of the cylindrical portion as compared with the proximal end side.   The heat insulation container according to claim 1, wherein the exterior body further includes a horizontal annular portion extending toward a center of the cylindrical portion at a tip of the annular portion.   The heat insulation according to claim 1 or 2, wherein the annular portion is formed such that a tip thereof is spaced from a bottom of the container body, and gas in the space is configured to be able to flow outside from a lower end opening of the cylindrical portion. container.