JP4509426B2 - Split box fitting structure and cooler box - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a fitting structure of a split type box divided into an upper box and a lower box, and a cooler box to which the fitting structure is applied.
[0002]
[Prior art]
Japanese Patent Application Laid-Open No. 10-262535 discloses a cooler box. This cooler box is configured by filling a hollow portion of a hollow box body with a heat insulating material made of polyurethane. Such a box body is generally an integral body formed by blow molding so as to have a hollow portion therein, and the heat insulating material injects polyurethane into the hollow portion from an injection hole formed in the box body. In this way, the hollow portion is filled.
[0003]
[Problems to be solved by the invention]
However, after the box body is blow-molded, it is troublesome to make the injection hole in the box body one by one, which reduces the production efficiency. Further, even when polyurethane or polyurethane is injected, it is difficult for polyurethane to reach every corner in the hollow portion of the box body, which may lead to molding defects.
[0004]
Therefore, the box body is divided into an upper box and a lower box, and before the two are assembled, after injecting polyurethane into the open lower box, the upper box is fitted into the lower box and assembled together. If so, the injection hole drilling operation as described above is not required, and the production efficiency is improved. Further, since polyurethane is injected into the lower box in the open state, the polyurethane spreads to every corner in the hollow portion of the box body, thereby eliminating molding defects.
[0005]
However, if the box body is divided into an upper box and a lower box as described above, polyurethane may leak from the fitting portion. In order to prevent this leakage, the concave / convex fitting between the upper box and the lower box may be deepened. However, if the concave / convex fitting is deepened, fitting assembly becomes difficult.
[0006]
The present invention has been made in view of the above points, and the object of the present invention is to assemble the upper box and the lower box so that the productivity is not lowered and the molding defect does not occur. It is to secure the sealing performance of the fitting portion between the upper box and the lower box and simplify the fitting assembly.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, the present invention is characterized in that the shape of the ridges and the concave grooves forming the fitting part has been devised.
[0008]
Specifically, the present invention is directed to a split-type box fitting structure and a cooler box to which the fitting structure is applied.
[0009]
That is, the invention according to claim 1 relates to the former split-type box fitting structure, in which the first fitting portion at the lower end of the upper box and the second fitting portion at the upper end of the lower box are fitted. A split-type box fitting structure in which the upper box and the lower box are assembled so as to have a heat insulating space between both box walls, and one of the first fitting part and the second fitting part Are provided with protrusions projecting in the vertical direction along the edge, on the inside and outside of the box of the protrusions, either the first fitting part or the second fitting part. The inner stepped portion and the outer stepped portion that are in contact with each other are formed with a step in the vertical direction with respect to the protruding portion, and the other one of the first fitting portion and the second fitting portion is provided with an edge. along and concave grooves the protrusions is fitted is recessed, on the upper box side While being formed continuously to the heat-insulating space and the lower box side of the heat-insulating space, a heat insulating material made of polyurethane for these insulation space is characterized in that it is filled.
[0010]
Invention of Claim 2 is related with the latter cooler box to which the fitting structure of Claim 1 was applied, The box main body which has an opening part which puts in / out a to-be-cooled object, and said opening part is provided. A cooler box having an upper lid that opens and closes, wherein the box body is a split type in which an upper box and a lower box are assembled, and the upper box has a bottomed inner plate wall and the inner box. The lower box is composed of a plate-like outer wall which is bent from the upper end of the inner wall to the side of the box body so as to have a heat insulation space with respect to the wall, and has a first fitting portion formed at the edge thereof. And is formed in a U-shaped cross section so as to have a heat insulating space with respect to the inner wall, and a second fitting portion that is fitted to the first fitting portion is formed at an edge of the inner wall, The space is made of polyurethane A heat-insulating material is filled, and one of the first fitting portion and the second fitting portion is provided with a protruding portion that protrudes in the vertical direction along the edge, and the inside of the protruding portion is inside the box. And on the outside, an inner step and an outer step contacting the other one of the first fitting portion and the second fitting portion are formed with a step in the vertical direction with respect to the protruding portion, One of the first fitting portion and the second fitting portion is provided with a recessed groove portion along the edge and into which the protruding portion is inserted.
[0011]
With the above-described configuration, in the first and second aspects of the invention, when the upper box and the lower box are fitted and assembled, there are steps on the inner side and the outer side of the protruding portion on the inner side and the outer side of the box. The one that is longer in the vertical direction due to the inner step and the outer step that are formed in this manner abuts the side surface of the groove groove portion a little earlier, and this contact portion serves as a guide to form the protrusion and groove groove portion. Fits smoothly and the upper box and lower box can be assembled easily. In addition, since the vertical dimension on the opposite side of the contact portion is shorter than the contact portion and the uneven fitting is shallower than the contact portion, the fitting and assembling property does not deteriorate.
[0012]
Furthermore , in the first and second aspects of the invention, in addition to the above-described effects, the side surface of the long ridge portion having a long vertical dimension is deeply fitted into the concave groove portion due to the steps on both sides of the ridge portion. Therefore, leakage of the injected polyurethane is surely prevented.
[0013]
In the invention according to claim 2, before assembling the upper box and the lower box, after injecting polyurethane into the opened lower box, the upper box is fitted into the lower box and assembled together. By doing so, it is not necessary to provide an injection hole for injecting polyurethane into the hollow portion as in the case of an integral product by blow molding, and the productivity is improved accordingly. Furthermore, by injecting polyurethane into the lower box in the open state, the polyurethane spreads to every corner in the hollow portion of the box body, and the molding defect is eliminated.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0015]
3 and 5 show a resin cooler box 1 used for a leisure or the like. The cooler box 1 includes a box body 3 having a housing portion 3a for housing a cold object (not shown) and an opening 3b for taking the cold material into and out of the housing portion 3a. An upper lid 5 is attached to the edge of the opening 3b of the main body 3 so as to be pivotable up and down by a hinge (not shown). The upper lid 5 pivots up and down around the hinge to open and close the opening 3b. It is supposed to be. As shown in FIG. 4, the box body 3 is a divided type in which an upper box 7 and a lower box 9 are assembled. The upper box 7 is held by a person when carrying the cooler box 1. A handle 11 is attached. In FIG. 5, reference numeral 13 denotes a lock member that locks and holds the upper lid 5 so as not to open unnecessarily.
[0016]
The upper lid 5 includes an outer lid 15 whose edge is bent downward, and an inner lid 17 whose edge is bent upward. On the inner surface of the edge of the outer lid 15, an inwardly projecting ridge portion 15 a is projected in a rectangular ring shape, and on the outer surface of the inner lid 17 edge, the ridge portion into which the ridge portion 15 a is fitted. The groove portion 17a is recessed in a rectangular ring shape, and the outer lid 15 and the inner lid 17 are assembled to form the upper lid 5 by fitting the protrusion portion 15a and the groove portion 17a. Further, a recess 17b that opens downward is formed in a rectangular ring shape near the edge of the inner lid 17, and the opening 3b of the box body 3 is formed in the recess 17b when the upper lid 5 is closed. A rubber sealing material 19 for sealing is fitted and fixed.
[0017]
The upper box 7 is provided with a bottomed plate-like inner wall 21 constituting the accommodating portion 3a, and the inner wall 21 is formed in a rectangular parallelepiped box shape so that the upper portion is opened to constitute the opening 3b. Has been. The inner wall 21 is bent downward from the upper end of the inner wall 21 toward the lower end of the side of the box body 3 so as to have a heat insulating space C1 with respect to the inner wall 21, and a first fitting portion 23 is provided at the edge of the inner wall 21. The formed plate-like outer wall 25 is integrally formed, and the outer wall 25 and the inner wall 21 constitute the upper box 7.
[0018]
On the other hand, the lower box 9 has a plate shape and is formed in a shallow dish shape having a U-shaped cross section so as to have a heat insulating space C2 with respect to the inner wall 21. A second fitting portion 27 that fits with the portion 23 is formed. The heat insulating spaces C1 and C2 are continuous, and the heat insulating spaces C1 and C2 are filled with a heat insulating material 29 made of polyurethane. A heat insulating material 31 is similarly filled in the heat insulating space C3 between the outer cover 15 and the inner cover 17 of the upper cover 5.
[0019]
The second fitting portion 27 of the lower box 9 is provided with a protrusion 33 protruding in a rectangular shape along the edge and projecting upward, while the first fitting portion 23 of the upper box 7 A concave groove 35 is formed in a rectangular ring shape along the edge and into which the protrusion 33 is inserted.
[0020]
1 and 2, the inner step 37a and the outer step 37b are provided on the inner and outer sides of the protrusion 33 of the lower box 9, as shown in FIGS. The outer stepped portion 37b is positioned below the inner stepped portion 37a. As a result, the outer surface 33a of the protrusion 33 is longer than the inner surface 33b. The first fitting portion 23 of the upper box 7 is also formed with an inner step portion 39a and an outer step portion 39b with a step in the vertical direction corresponding to the protruding shape of the protruding portion 33, and the outer portion The step portion 39b is positioned below the inner step portion 39a. As a result, the outer side surface 35a of the concave groove 35 is longer than the inner side surface 35b. Then, in a state where the upper box 7 and the lower box 9 are fitted and assembled, the inner step portion 39a of the first fitting portion 23 contacts the inner step portion 37a of the second fitting portion 27. The outer step portion 39b of the first fitting portion 23 comes into contact with the outer step portion 37b of the second fitting portion 27.
[0021]
Therefore, when the upper box 7 and the lower box 9 are fitted and assembled, first, the outer side surface 33a which is longer than the inner side surface 33b of the ridge portion 33 and the inner side surface of the concave groove portion 35 are first set. Since the outer side surface 35a that is longer than 35b comes into contact with the outer side surface 35a, the outer side surfaces 33a and 35a can guide each other to smoothly fit the protruding portion 33 and the concave groove portion 35, The upper box 7 and the lower box 9 can be easily assembled. Moreover, the inner surfaces 33b and 35b on the opposite side of the contact portion are both shortened in the vertical direction so that the concave / convex fitting is made shallower than the contact portion, so that the fitting and assembling property is deteriorated. There is no.
[0022]
Furthermore, since the outer surface 33a of the protrusion 33 and the outer surface 35a of the groove groove 35 are both elongated in the vertical direction, the uneven fitting is made deeper than the inner surfaces 33b, 35b on the opposite side. Sealing of the fitting portion can be ensured by preventing the polyurethane injected into the heat insulating spaces C1 and C2 from leaking.
[0023]
Further, before assembling the upper box 7 and the lower box 9, after injecting polyurethane into the opened lower box 9, the upper box 7 is fitted into the lower box 9 and assembled together. Thus, there is no need to make an injection hole for injecting polyurethane into the hollow portion as in the case of an integral product by blow molding, and the productivity can be improved accordingly. Furthermore, by injecting polyurethane into the lower box 9 in an open state, the polyurethane can be spread to every corner in the heat insulating spaces C1 and C2 of the box body 3 to eliminate molding defects.
[0024]
In the above embodiment, the protrusion 33 is provided on the second fitting part 27 of the lower box 9 and the groove 35 is provided on the first fitting part 23 of the upper box 7. On the contrary, the protrusion 33 is protruded from the first fitting part 23 of the upper box 7, and the concave groove 35 is recessed to the second fitting part 27 of the lower box 9. It is possible to obtain the operational effects.
[0025]
【The invention's effect】
As described above, according to the inventions according to claims 1 and 2 , when the upper box and the lower box are fitted and assembled, the inner step portion and the outer step among the outer surface and the inner surface of the ridge portion are assembled. Since the part that is longer in the vertical direction due to the step of the part is brought into contact with the side surface of the grooved groove part one step earlier than the other parts, the protrusion is fitted to the grooved groove part using that part as a guide The upper box and the lower box can be easily assembled. Moreover, since the opposite side of the contact portion is short in the vertical direction, the concave / convex fitting is made shallower than the contact portion and the fitting and assembling property is not impaired.
[0026]
Furthermore, according to the first and second aspects of the invention, in addition to the above-described effects, the longer side in the vertical direction is recessed by the steps of the inner stepped portion and the outer stepped portion of the outer side surface and the inner side surface of the protruding portion. Since it is made to fit deeply into the groove portion, leakage of the injected polyurethane can be reliably prevented.
[0027]
Further , according to the invention described in claim 2, after injecting polyurethane into the lower box in an open state, the upper box is fitted into the lower box and assembled together, whereby injection like blow molding is performed. It is possible to eliminate the hole drilling operation and improve productivity accordingly. Further, by injecting polyurethane into the lower box in an open state, the polyurethane can be spread to every corner in the hollow portion of the box body, thereby eliminating molding defects.
[Brief description of the drawings]
FIG. 1 is an enlarged view of a part A in FIG.
FIG. 2 is an exploded perspective view of FIG.
3 is a cross-sectional view taken along line III-III in FIG.
FIG. 4 is an exploded perspective view of a box body.
FIG. 5 is a perspective view of a cooler box.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Cooler box 3 Box main body 3b Opening part 5 Upper cover 7 Upper box 9 Lower box 21 Inner wall 23 1st fitting part 25 Outer wall 27 2nd fitting part 29 Heat insulating material 33 Projection part 35 Groove groove part 37a Inner step part 37b Outer step

Claims (2)

A split type in which the first fitting part at the lower end of the upper box and the second fitting part at the upper end of the lower box are fitted together, and the upper box and the lower box are assembled so as to have a heat insulating space between both box walls. Box fitting structure,
Either one of the first fitting portion and the second fitting portion is provided with a protruding portion that protrudes in the vertical direction along the edge,
On the inner side and the outer side of the protruding portion, the inner stepped portion and the outer stepped portion that are in contact with either the first fitting portion or the second fitting portion are stepped in the vertical direction with respect to the protruding portion. Formed with
On the other side of the first fitting part and the second fitting part, a concave groove part along the edge and into which the protruding part is inserted is recessed ,
The above-mentioned heat insulation space on the upper box side and the heat insulation space on the lower box side are formed continuously, and these heat insulation spaces are filled with a heat insulating material made of polyurethane. Combined structure. A cooler box comprising a box body having an opening for putting in and out the object to be cooled, and an upper lid for opening and closing the opening,
The box body is a split type in which an upper box and a lower box are assembled.
The upper box is bent from the inner wall upper end to the box body side so as to have a bottomed plate-like inner wall and a heat insulating space with respect to the inner wall, and a first fitting portion is formed at the edge of the upper box. Plate-like outer wall,
The lower box has a plate shape, is formed in a U-shaped cross section so as to have a heat insulating space with respect to the inner wall, and has a second fitting portion fitted to the first fitting portion at an end edge thereof. Formed,
The heat insulating space is filled with a heat insulating material made of polyurethane,
Either one of the first fitting portion and the second fitting portion is provided with a protruding portion that protrudes in the vertical direction along the edge,
On the inner side and the outer side of the protruding portion, the inner stepped portion and the outer stepped portion that are in contact with either the first fitting portion or the second fitting portion are stepped in the vertical direction with respect to the protruding portion. Formed with
A cooler box, wherein a concave groove portion is provided along one end of the first fitting portion and the second fitting portion and into which the protruding portion is inserted.

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