JP5495248B2 - Cooling material holding mechanism and cooler box - Google Patents

Description

  The present invention relates to a cold insulation material holding mechanism for detachably attaching a cold insulation material to a cold insulation chamber and a cooler box as a cold insulation chamber provided with the cold insulation material holding mechanism.

As a first conventional example of this type of cold insulation material holding mechanism, for example, an engagement groove is formed on the inner surface of a flat rectangular cooler box, and an outer edge portion of the cold insulation material is press-fitted into the engagement groove. (For example, refer to Patent Document 1). In addition, as a second conventional example, the cooler box lid has a double structure, the cold insulation material is accommodated between the lids, and the cold insulation material is exposed to the cooler box through the window of the inner lid. It is known (see, for example, Patent Document 2).
Japanese Utility Model Publication No. 04-128275 ([0007], FIGS. 1 and 2) Japanese Utility Model Publication No. 04-3976 (5th page, Fig. 1)

  However, in the first conventional example described above, since the cold insulating material is fixed by press fitting, it is difficult to attach and detach the cold insulating material. In addition, when the cold insulation material was repeatedly attached and detached, the press-fitted portion was plastically deformed to reduce the holding force, and the cold insulation material could be detached during use of the cooler box. Further, in the above-described second conventional example, it is necessary to disassemble the double-structured lid when attaching / detaching the cold insulation material, so that the attaching / detaching work is troublesome.

  This invention is made | formed in view of the said situation, and aims at provision of the cooler material holding | maintenance mechanism and cooler box which can attach or detach a cold insulator easily.

The cold insulation material holding mechanism according to the invention of claim 1 made to achieve the above object is a cold insulation material holding mechanism for detachably attaching a flat rectangular parallelepiped cold insulation material to the inner surface of the wall of the cold storage chamber. The first and second engagement grooves capable of receiving a pair of side edges of the cold insulator are disposed opposite to the inner surface of the wall body, and an elastic member having higher elasticity than the wall body is provided in the first engagement. provided in the groove, it pushed the one side edge of the cold insulating material through the grooves between the opening between the first and the second engaging groove in the first engaging groove, cold insulating material by the elastic force of the elastic member Is pushed back so that the other side edge fits into the second engagement groove.

  The invention of claim 2 is the cold insulation material holding mechanism according to claim 1, wherein the wall of the cold insulation chamber is made of a foamed material obtained by foaming a polyolefin-based resin at a foaming ratio of 5 to 45 times, and the elastic member is It is characterized in that it is made of a foamed material obtained by foaming a polyolefin resin at a foaming ratio of 18 to 60 times.

  According to a third aspect of the present invention, in the cold insulation material holding mechanism according to the second aspect, the wall of the cold insulation chamber is made of a polypropylene foam material, and the elastic member is made of a polyethylene foam material. Have

  According to a fourth aspect of the present invention, in the cold insulator holding mechanism according to any one of the first to third aspects, the elastic member extends in a direction opposite to the first and second engagement grooves, and the first engagement groove The inner surface is characterized in that a recess in the groove for receiving one end of the elastic member and projecting the other end from the inner surface of the first engaging groove is formed on the inner surface.

  According to a fifth aspect of the present invention, in the cold insulation material holding mechanism according to any one of the first to fourth aspects, the first engagement groove is brought into contact with the cold insulation material when the elastic material is deformed. It is characterized in that a stopper for regulating the amount is provided.

  The cooler box which concerns on invention of Claim 6 has the characteristics in the place provided with the cold insulating material holding mechanism in any one of Claim 1 thru | or 5.

[Invention of Claim 1]
In the cold insulation material holding mechanism according to claim 1, in order to attach the cold insulation material, one side edge portion of the cold insulation material is pushed into the first engagement groove from the opening between the grooves, and the elastic member is compressed and deformed by the pushing operation. . Then, the cold insulator is rotated so that the other side edge is brought into contact with the second engagement groove, and the pressing operation is stopped in this state. Then, the other side edge portion of the cold insulating material was fitted into the second engagement groove by the elastic force of the elastic member, and the pair of side edge portions of the cold insulation material was engaged with the first and second engagement grooves. Kept in a state. Further, in order to remove the cold insulation material, the cold insulation material is pressed toward the first engagement groove and the other side edge portion of the cold insulation material is detached from the second engagement groove, and then the cold insulation material is removed from the groove opening side. Wake up and pull out. Here, since the elastic member has higher elasticity than the wall of the cold insulation chamber, the cold insulation material can be easily attached and detached from the conventional one in which the cold insulation material is press-fitted. Further, since an operation for disassembling the double-structured lid as in the prior art is not required for attaching / detaching the cold insulation material, the attaching / detaching operation does not take time and effort.

[Inventions of Claims 2 and 3]
According to the configuration of claim 2, since the foam material constituting the wall of the cold insulation chamber and the foam material constituting the elastic member are both polyolefin-based resin, the wall of the cold insulation chamber and the elastic member are not separated. Recycling can be performed easily.

  Here, with polypropylene and polyethylene, which are typical polyolefin resins, polypropylene can increase rigidity relatively easily, while polyethylene can increase elasticity relatively easily. According to the third aspect of the present invention, since the wall of the cold insulation chamber is made of a foamed polypropylene material, the rigidity of the wall is increased and the holding of the cold insulation is stabilized. In addition, since the elastic member is made of a polyethylene foam material, the elasticity becomes high, and the operation for attaching and detaching the cold insulation material becomes easy.

[Invention of claim 4]
According to the fourth aspect of the present invention, the inner surface of the first engagement groove is formed with the groove recess for receiving the one end of the elastic member, so that the elastic member has a depth corresponding to the depth of the groove recess. It becomes longer in the direction of compression deformation. Thereby, the ratio of the deformation amount with respect to the full length of the elastic member is suppressed to be small, and plastic deformation of the elastic member can be prevented.

[Invention of claim 5]
According to the configuration of the fifth aspect, the amount of deformation of the elastic member can be regulated and the plastic deformation of the elastic member can be prevented by the contact between the stopper inside the first engagement groove and the cold insulating material.

[Invention of claim 6]
Since the cooler box according to the sixth aspect includes the cold insulation material holding mechanism according to any one of the first to sixth aspects, the cold insulation material can be easily attached and detached, and the retention of the cold insulation material is stabilized.

[First Embodiment]
Hereinafter, embodiments of the present invention will be described with reference to FIGS. As shown in FIG. 1A, the cooler box 10 of the present embodiment includes a box body 11 and a lid body 12. The box body 11 has a rectangular parallelepiped shape with an open top surface. Further, as shown in FIG. 1B, an inner fitting protruding wall 11A is formed on the upper edge surface of the side wall 11S of the box body 11 so as to protrude on the inner edge side.

  The lid 12 has a rectangular flat plate shape. Moreover, 12 A of outer fitting protrusion walls protrude from the outer edge part of the inner surface 12N which faced the box main body 11 side among the cover bodies 12. FIG. When the lid 12 is assembled to the box body 11, the outer fitting projection wall 12A of the lid 12 is fitted to the outside of the inner fitting projection wall 11A of the box body 11, and the bottom of the outer fitting projection wall 12A. The end surfaces are joined to the upper end surface of the side wall 11S of the box body 11, and the outer surfaces of the box body 11 and the lid 12 are flush with each other.

  Now, the inner surface 12N of the lid body 12 is provided with a pair of cold insulation material holding mechanisms 50, 50 for attaching the pair of cold insulation materials 40, 40. The cold insulation material 40 is shown in FIG. 4 and is formed by filling a cold insulation liquid into a flat rectangular parallelepiped container, for example. The container for the cold insulating material 40 has a plurality of through holes 41 in the thickness direction in order to increase the surface area.

  As shown in FIG. 2 (A), a pair of flat recesses 13 and 13 for forming a pair of cold insulation material holding mechanisms 50 and 50 are recessed in the inner surface 12N of the lid 12. The opening 13K (corresponding to the “inter-groove opening” in the present invention) of each of the flat recesses 13 is rectangular. Moreover, the flat recessed part 13 is equipped with the flat space where depth is small compared with the opening width of the opening 13K inside. The pair of flat recesses 13 and 13 are symmetrically arranged between the openings 13K and 13K so that the long sides are parallel to each other.

  As shown in FIG. 2B, the distance between the pair of inner side surfaces 13T and 13T parallel to the short side of the opening 13K in the flat recess 13 is substantially the same as the long side of the planar shape of the cold insulator 40. ing. On the other hand, as shown in FIG. 2A, the pair of inner side surfaces 13C and 13C parallel to the long side of the opening 13K in the flat recess 13 protrudes from the opening edge of the opening 13K so as to approach each other. 1 and 2nd engagement protrusion walls 31T and 32T are provided. As shown in FIG. 3A, the first engagement groove 31T according to the present invention is formed by the first engagement protrusion wall 31T, the bottom wall 12B of the flat recess 13 and the wall portion sandwiched between them. It is configured. The second engagement groove 32 according to the present invention is configured by the second engagement protrusion wall 32T, the bottom wall 12B of the flat recess 13 and the wall portion sandwiched between them.

  Note that, between the pair of flat recesses 13 and 13, the first engagement grooves 31 and 31 are disposed on the side away from each other, while the second engagement grooves 32 and 32 are close to each other. Is arranged.

  The distance between the back surfaces of the first and second engagement grooves 31 and 32 is larger than the short side of the planar shape of the cold insulator 40 (see FIG. 4). Moreover, the space | interval of the tip surfaces of the 1st and 2nd engagement protrusion walls 31T and 32T is smaller than the short side of the planar shape of the cold insulating material 40. FIG. Further, the amount of protrusion of the first engagement protrusion wall 31T with respect to the back surface of the first engagement groove 31 is larger than the amount of protrusion of the second engagement protrusion wall 32T with respect to the back surface of the second engagement groove 32. It has become.

  As shown in FIG. 2 (B), in-groove recesses 15 and 15 according to the present invention are formed on the inner surface of the first engagement groove 31 at both end portions in the longitudinal direction. Each in-groove recess 15 has a quadrangular cross-sectional shape when viewed from the opposing direction of the first and second engaging grooves 31 and 32. Further, as shown in FIG. 3A, the pair of inner side surfaces in the in-groove recess 15 are flush with the opposing surfaces of the first engagement protrusion wall 31T and the bottom wall 12B, The other inner surface of the recess 15 is flush with the inner surface 13T of the flat recess 13, and the remaining inner surface of the groove recess 15 is parallel to the inner surface 13T of the flat recess 13. .

  As shown in FIG. 3B, a prismatic sponge 20 is attached to each recess 15 in the groove. The prismatic sponge 20 has a prismatic shape extending in opposition to the first engaging grooves 31 and 32. One end of the prismatic sponge 20 is received in the recess 15 in the groove, and the other end of the prismatic sponge 20 protrudes from the recess 15 in the groove. Specifically, the square sponge 20 has a square cross section, and one side of the square is the same as the interval between the pair of inner side surfaces of the in-groove recess 15 facing the longitudinal direction of the first engagement groove 31. It has become. The prismatic sponge 20 is frictionally locked to a pair of inner surfaces of the recesses 15 in the groove to prevent the recesses 15 from coming off. In addition, you may fix to the back surface of the recessed part 15 in a groove | channel with the adhesive agent at the one end surface of the prismatic sponge 20. FIG.

  Further, one side of the square which is the cross-sectional shape of the prismatic sponge 20 is slightly smaller than the distance between the pair of inner side surfaces in the in-groove recess 15 opposed in the width direction of the first engagement groove 31. As a result, a gap 20 </ b> S is formed between the prismatic sponge 20 and the inner surface of the in-groove recess 15. The gap 20 </ b> S allows the side surface of the prismatic sponge 20 to bulge along with the compression deformation of the prismatic sponge 20. Further, a portion of the flat recess 13 sandwiched between the pair of in-groove recesses 15, 15 is a groove back wall 14 corresponding to the “stopper” of the present invention.

  As shown in FIG. 2A, a take-out operation hole 16 is formed in the center of the second engagement groove 32 in the longitudinal direction. The take-out operation hole 16 cuts the second engagement protrusion wall 32T with a width slightly wider than the width of a general adult index finger, and the back surface of the second engagement groove 32 so as to be continuous with the cut portion. It has a depressed structure. The take-out operation hole 16 is opened to the inner surface 12N of the lid 12 and the back surface of the second engagement groove 32, and a finger is inserted therein to hang the finger on the cold insulating material 40 in the flat recess 13. Can do.

  The lid body 12 and the box body 11 excluding the above-described prismatic sponge 20 correspond to the “wall body of the cold insulation chamber” according to the present invention. The lid body 12 and the box body 11 are made of, for example, polypropylene foamed at a foaming ratio of 5 to 45 times (more specifically, 20 times) to form an independent foam structure (that is, a plurality of foamed particles are combined). The structure is made of a foam material. On the other hand, the prismatic sponge 20 corresponds to an “elastic member” according to the present invention. The prismatic sponge 20 is made of, for example, a foam material in which polyethylene is foamed at an expansion ratio of 18 to 60 times (more specifically, 50 times) to form a continuous foam structure (so-called sponge structure). In addition, the whole cooler box 10 is corresponded to the "cold room" of this invention.

  The description regarding the structure of the cooler box 10 of this embodiment is above. Next, the effect of the cooler box 10 will be described.

  In order to attach the cold insulation material 40 to the lid body 12, as shown in FIG. 4A, the inner surface 12N of the lid body 12 is directed upward, and one side edge portion 42 of the cold insulation material 40 is opened. It is pushed into the first engagement groove 31 from 13K. Then, the pair of prismatic sponges 20 and 20 in the first engagement groove 31 are pushed by the cold insulation material 40 and are compressed and deformed.

  Here, a pair of in-groove recesses 15 and 15 are provided on the inner surface of the first engagement groove 31, and each prism sponge 20 is elongated by the depth of the in-groove recess 15. The ratio of the deformation amount with respect to the total length of 20 can be kept small. Thereby, the plastic deformation of the prismatic sponge 20 is prevented. Further, when the cold insulation material 40 is about to be pushed into the first engagement groove 31 more than necessary, the groove inner wall 14 in the first engagement groove 31 abuts the cold insulation material 40, thereby The deformation amount of the prismatic sponge 20 is restricted, and this point also prevents plastic deformation of the prismatic sponge 20. The groove back wall 14 also plays a role of connecting and reinforcing the first engaging protruding wall 31T and the bottom wall 12B.

  As described above, by pushing one side edge portion 42 of the cold insulation material 40 into the first engagement groove 31, the other side edge portion 42 of the cold insulation material 40 is moved from the tip of the second engagement protrusion wall 32T. When positioned inside the opening 13K, as shown in FIG. 4B, the cold insulation material 40 is rotated to press the entire cold insulation material 40 against the bottom wall 12B of the flat recess 13. Then, the hand is released from the cold insulation material 40 with the other side edge 42 of the cold insulation material 40 butted against the second engagement groove 32. Then, as shown in FIG. 4C, the other side edge portion 42 of the cold insulating material 40 is fitted into the second engagement groove 32 by the elastic force of the prismatic sponge 20. Accordingly, the pair of side edge portions 42 and 42 of the cold insulating material 40 are held in a state of being engaged with the first and second engagement grooves 31 and 32. At this time, the prismatic sponge 20 returns to a natural state (a state where it is not elastically deformed), and the tip surface of the prismatic sponge 20 is adjacent to the side surface of the cold insulator 40. Thus, the operation for attaching the cold insulation material 40 to the lid 12 is completed.

  The lid 12 on which the cold insulation material 40 has been attached may be turned upside down and attached to the box body 11. Then, the inner space of the cooler box 10 is sealed, and the inner space of the cooler box 10 is maintained in a cooled state by the cold insulating material 40. At this time, the cold insulating material 40 is supported from below by the first and second engagement protrusion walls 31T and 32T, and is prevented from being detached from the flat recess 13.

  Moreover, what is necessary is just to remove from the cover body 12 and to cool with the refrigerator, in order to reuse the cold insulating material 40. FIG. Therefore, in order to remove the cold insulating material 40 from the lid body 12, the lid body 12 is removed from the box body 11, and the inner surface 12N is directed upward. Then, a finger is inserted into the take-out operation hole 16, hooked on the side edge portion 42 of the cold insulating material 40, and pressed toward the first engagement groove 31. Thus, when the side edge portion 42 of the cold insulating material 40 is detached from the second engagement groove 32, the cold insulating material 40 may be raised and pulled out to the outside of the opening 13K.

  As described above, according to the configuration of the present embodiment, the cold insulator 40 can be attached and detached by expanding and contracting the rectangular columnar sponge 20 having higher elasticity than the box body 11 and the lid body 12 which are the walls of the cooler box 10. The attachment / detachment operation becomes easier than conventional. In addition, when the cold insulator 40 is attached to the lid 12, the prismatic sponge 20 that has been elastically deformed during the attachment process returns to a natural state, so that a decrease in the elasticity of the prismatic sponge 20 can be prevented. Furthermore, since the front end surface of the prismatic sponge 20 is adjacent to the side surface of the cold insulation material 40 after the cold insulation material 40 is attached, the play of the cold insulation material 40 can be prevented. In addition, in order to improve the play prevention function, the prismatic sponge 20 is maintained in an elastically deformed state with the cold insulator 40 attached, and the side edge portion 42 of the cold insulator 40 is secondly engaged by its elastic force. You may comprise so that it may be pressed on the inner surface of the joint groove 32.

  Moreover, in this embodiment, since the foam material which comprises the box main body 11 and the cover body 12 and the prismatic sponge 20 is all polyolefin resin, when recycling which melt | dissolves the cooler box 10 and returns it to a raw material, a box main body is performed. 11, it is not necessary to separate the lid body 12 and the prismatic sponge 20, and recycling becomes easy. In addition, among the polyolefin-based resins, the foam material constituting the box body 11 and the lid body 12 is polypropylene, so that the rigidity is high, and also in this respect, the holding of the cold insulating material 40 is stable. On the other hand, since the foam material constituting the prismatic sponge 20 is polyethylene, the elasticity is high, and also in this respect, the operation for attaching and detaching the cold insulating material 40 is facilitated. Furthermore, in the cooler box 10 of this embodiment, while the foam material which comprises the box main body 11 and the cover body 12 in which heat insulation is required is made into the independent foam structure excellent in heat insulation, the necessity of heat insulation exists. Since the foam material constituting the low prismatic sponge 20 has a continuous foam structure that can be manufactured at low cost, the coolability of the cooler box 10 can be increased and the manufacturing cost can be suppressed.

[Second Embodiment]
This embodiment is shown in FIG. 5, and only the structure in the prismatic sponge 20V and the first engagement groove 31 is different from the first embodiment. That is, as shown in FIG. 5A, the entire inner surface 31V of the first engagement groove 31 of the present embodiment is a flat surface. Further, as shown in FIG. 5B, the prismatic sponge 20V has a prismatic structure extending over the entire longitudinal direction of the inner surface 31V. Then, when the side edge portion 42 of the cold insulating material 40 (see FIG. 4) is inserted into the first engagement groove 31, the entire side edge portion 42 comes into contact with the entire side surface of the prismatic sponge 20V, and the prismatic sponge 20V is compressed. The cold insulating material 40 is pushed back to the second engagement groove 32 side by the elastic force, and the cold insulating material 40 is held in the flat recess 13. Also according to the configuration of the present embodiment, the refrigeration material 40 can be attached and detached more easily than the conventional one, and the play of the refrigeration material 40 can be suppressed.

[Other Embodiments]
The present invention is not limited to the above-described embodiment. For example, the embodiments described below are also included in the technical scope of the present invention, and various other than the following can be made without departing from the scope of the invention. It can be changed and implemented.

  (1) In the first and second embodiments, the flat concave portion 13 is provided in the lid body 12 as the “wall body of the cold insulation chamber” according to the present invention, and the first and first surfaces are opposed to the flat concave portion 13. The two engaging grooves 31 and 32 are formed, but a pair of projecting walls are protruded from the inner surface of the “wall body of the cold storage chamber” according to the present invention and are opposed to each other. First and second engagement grooves may be formed on the surface.

  (2) In the first and second embodiments, the prismatic sponges 20 and 20V as the “elastic members” according to the present invention are made of polyethylene foam material, but the “elastic members” according to the present invention. May be made of a foamed material other than polyethylene (eg, polypropylene, polyurethane, polystyrene), or may be made of a material other than the foamed material, such as a coil spring, a leaf spring, or rubber.

  (3) In the first and second embodiments, the lid body 12 and the box main body 11 as the “wall body of the cold insulation chamber” according to the present invention are made of polypropylene foam. The “cold chamber wall” may be a foamed material of resin other than polypropylene (for example, polyethylene or polystyrene), or may be a molded product of resin, for example.

The perspective view of a cooler box in a 1st embodiment concerning the present invention. Perspective view of lid Perspective view of lid The perspective view which showed the procedure which attaches a cold insulating material to a cover body The perspective view of the lid in the cooler box of a 2nd embodiment.

Explanation of symbols

10 Cooler box 11 Box body 12 Lid 13 Flat recess 13K Opening (opening between grooves)
14 Groove wall (stopper)
15 Recess in groove 20,20V Square column sponge (elastic member)
31 1st engaging groove 32 2nd engaging groove 40 Cold insulator 42 Side edge part 50 Cold insulator holding mechanism

Claims (6)

In the cold insulation material holding mechanism for detachably attaching the flat rectangular parallelepiped shape cold insulation material to the inner surface of the wall of the cold insulation chamber,
The first and second engaging grooves that can receive a pair of side edges of the cold insulator are disposed opposite to the inner surface of the wall body, and an elastic member having higher elasticity than the wall body is provided in the first wall. disposed within the engaging groove to,
When the one side edge of the cold insulator is pushed into the first engagement groove through the inter-groove opening between the first and second engagement grooves, the cold insulation is caused by the elastic force of the elastic member. A cold insulating material holding mechanism, wherein the material is pushed back so that the other side edge fits into the second engagement groove. The wall of the cold room is made of a foamed material obtained by foaming a polyolefin resin at a foaming ratio of 5 to 45 times,
The cold insulation material holding mechanism according to claim 1, wherein the elastic member is made of a foamed material obtained by foaming a polyolefin resin at a foaming ratio of 18 to 60 times.   The cold insulation material holding mechanism according to claim 2, wherein the wall body of the cold insulation chamber is made of a polypropylene foam material, and the elastic member is made of a polyethylene foam material. The elastic member extends in the opposing direction of the first and second engaging grooves;
A recess in the groove for receiving one end of the elastic member and projecting the other end from the back surface of the first engagement groove is formed on the back surface of the first engagement groove. The cold insulation material holding mechanism according to any one of claims 1 to 3, wherein the cold insulation material holding mechanism is provided.   5. The stopper according to claim 1, wherein a stopper is provided inside the first engaging groove to contact the cold insulator when the cold insulating material is pushed in, and to restrict a deformation amount of the elastic member. The cold insulator holding mechanism according to any one of the above.   A cooler box comprising the cold insulation material holding mechanism according to any one of claims 1 to 5.

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