JP2002360144A - Fitting structure of separable box, and cooler box - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable an upper box and a lower box to be assembled by fitting so as not to cause the reduction of productivity and the defect of formation, and further to secure the sealing properties at the fitting part of the upper and the lower boxes and to simplify the fitting and assembly. SOLUTION: A depression line-shaped groove part 35 is formed at the first fitting part 23 at the lower end of the upper box 7 so as to be depressed. A protruded line part 33 is protruded from the second fitting part 27 at the upper end of the lower box 9. An inner side step part 37a and an outer side step part 37b, in contact with an inner side step part 39a and an outer side step part 39b of the first fitting part 23 are formed at the inside and the outside of the protruded part 33 as the box so as to have differences in the upper and lower direction based on the protrusion line part 33. The upper box 7 and the lower box 9 are assembled by fitting the protrusion line part 33 and the depression line-shaped groove part 35.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fitting structure of a divided box divided into an upper box and a lower box, and a cooler box to which the fitting structure is applied.

[0002]

2. Description of the Related Art JP-A-10-262535 discloses that
A cooler box is disclosed. This cooler box is formed 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 to have a hollow portion inside by blow molding, and the heat insulating material is obtained by injecting polyurethane into the hollow portion from an injection hole formed in the box body. To fill the hollow space.

[0003]

However, after the box main body is blow-molded, it is time-consuming to form an injection hole in the box main body one by one, which lowers production efficiency. Also, even if polyurethane is injected, it is difficult for polyurethane to spread to every corner in the hollow portion of the box main body, which may cause molding defects.

Therefore, the box body is divided into an upper box and a lower box. Before assembling the two parts, polyurethane is injected into the open lower box, and the upper box is fitted into the lower box so that the two are fitted together. By assembling, the injection hole drilling operation as described above is not required, and the production efficiency is improved. Further, since the polyurethane is injected into the open lower box, the polyurethane can be spread to every corner in the hollow portion of the box body to eliminate molding defects.

However, when the box body is divided into the upper box and the lower box as described above, there is a possibility that the polyurethane leaks from the fitting portion. In order to prevent this leakage, the concave and convex fitting between the upper box and the lower box may be deepened. However, if the concave and convex fitting is deep, the fitting assemblability becomes difficult.

The present invention has been made in view of the above circumstances, and an object of the present invention is to fit an upper box and a lower box together so as to prevent a decrease in productivity and a molding defect. At this time, it is an object to secure the sealing property of the fitting portion between the upper box and the lower box and to simplify the fitting and assembling property.

[0007]

In order to achieve the above-mentioned object, the present invention is characterized by devising the shape of a ridge or a groove forming a fitting portion.

More specifically, the present invention is directed to a fitting structure for a split box and a cooler box to which the fitting structure is applied, and has taken the following solutions.

That is, the first aspect of the present invention relates to the former fitting structure of the split box, wherein 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.
It is a fitting structure of a split box in which the upper box and the lower box are assembled by fitting the fitting section, and one of the first fitting section and the second fitting section is A ridge projecting vertically along the edge is provided, and the first ridge is provided inside and outside the box of the ridge.
An inner step portion and an outer step portion which are in contact with one of the other of the fitting portion and the second fitting portion are formed so as to have a step in the vertical direction with respect to the ridge portion. The other of the two fitting portions is characterized in that a concave groove along the edge and into which the projecting portion is fitted is recessed.

According to the first aspect of the present invention, when the upper box and the lower box are fitted together and assembled, a step is formed between the inner side and the outer side of the ridge portion inside and outside the box. The longer in the vertical direction due to the inner step portion and the outer step portion formed to have contact with the side surface of the concave groove portion a little earlier, and the contact portion serves as a guide to serve as a protrusion and the concave groove portion. Are fitted smoothly, and the upper box and the lower box are easily assembled. In addition, the vertical dimension on the opposite side of the contact portion is shorter than the contact portion, and the concave / convex fitting is shallower than the contact portion, so that the fitting assemblability does not deteriorate.

[0011] The invention according to claim 2 relates to the latter cooler box to which the fitting structure according to claim 1 is applied, wherein the box body having an opening through which a material to be cooled is put in and out; A cooler box having an upper lid that opens and closes an opening, 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 plate-like inner wall and And a plate-shaped outer wall having a first fitting portion formed at an edge thereof from an upper end of the inner wall to a side of the box main body so as to have a heat insulating space with respect to the inner wall. 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 fits with the first fitting portion is formed at an edge thereof. In the above insulation space, A heat insulating material made of a tongue is filled, and at least one of the first fitting portion and the second fitting portion is provided with a ridge projecting along an edge and projecting in a vertical direction. Inside and outside of the box, an inner step and an outer step that contact one of the first fitting section and the second fitting section have a step in the vertical direction with respect to the ridge. A groove is formed in the other of the first fitting portion and the second fitting portion along the edge and into which the protruding portion is fitted.

According to the second aspect of the present invention, in addition to the functions and effects of the first aspect, in addition to the effect of the first aspect, the side surface of the ridge portion having a long dimension in the vertical direction due to the step on both sides of the ridge portion is concave. Since it is fitted deeply in the groove, leakage of the injected polyurethane is reliably prevented. Also, before assembling the upper box and the lower box, after injecting polyurethane into the open lower box, the upper box is fitted to the lower box to assemble them, so that they can be integrated by blow molding. It is not necessary to form an injection hole for injecting polyurethane into the hollow portion like a product, and the productivity is improved by that much. Further, by injecting polyurethane into the open lower box, the polyurethane spreads to every corner in the hollow portion of the box main body, thereby eliminating molding defects.

[0013]

Embodiments of the present invention will be described below with reference to the drawings.

FIGS. 3 and 5 show a resin cooler box 1 used for a reja or the like. This cooler box 1
A box body 3 having a housing portion 3a for accommodating an object to be cooled (not shown) and an opening 3b through which the object to be cooled is put in and out of the accommodation portion 3a; An upper lid 5 is attached to the end edge by a hinge (not shown) so as to be rotatable in the vertical direction. The upper lid 5 is rotated vertically with the hinge as a fulcrum to open and close the opening 3b. . As shown in FIG. 4, the box body 3 is a split type in which an upper box 7 and a lower box 9 are assembled, and the upper box 7 is gripped 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 cover 5 so as not to open unnecessarily.

The upper lid 5 comprises an outer lid 15 having an edge bent downward, and an inner lid 17 having an edge bent upward. An inwardly protruding ridge 15a is provided on the inner surface of the edge of the outer lid 15 so as to protrude in a rectangular ring shape, and a concave ridge on which the ridge 15a fits is formed on the outer surface of the edge of the inner lid 17. A groove 17a is recessed in a rectangular ring shape, and the protruding ridge 15a and the concave groove 17 are formed.
a, the outer lid 15 and the inner lid 17
Are assembled to form the upper lid 5. A recess 17b opening downward is provided near the edge of the inner lid 17.
A rubber seal member 19 for sealing the opening 3b of the box body 3 when the upper lid 5 is closed is fitted and fixed to the recess 17b.

The upper box 7 is provided with the housing 3a.
The inner wall 21 is formed in a rectangular parallelepiped box shape so as to open upward to form the opening 3b. This inner wall 21
A plate which is bent downward from the upper end of the inner wall 21 to a position closer to 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 formed at the edge thereof. The outer wall 25 is formed integrally with the outer wall 2.
5 and the inner wall 21 constitute the upper box 7.

On the other hand, the lower box 9 is plate-shaped and 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 first fitting portion 23 is formed. Further, the heat insulating space C1 and C2 are filled with a heat insulating material 29 made of polyurethane. A heat insulating material 31 is similarly filled in a heat insulating space C3 between the outer lid 15 and the inner lid 17 of the upper lid 5.

The second fitting portion 27 of the lower box 9 is provided with a ridge 33 projecting along the edge and upward in a rectangular ring shape, while the first fitting portion 27 of the upper box 7 is provided.
The fitting portion 23 is provided with a concave groove 35 along the edge and into which the protrusion 33 is fitted.

As a feature of the present invention, as shown in FIG. 1 and FIG. 2, the inner step 37a and the outer step 37b are provided inside and outside the protruding ridge 33 of the lower box 9, respectively. The step 33 is formed with a step in the vertical direction with respect to the ridge 33, and the outer step 37b is located lower than the inner step 37a. As a result, the outer surface 33a of the ridge 33 is longer than the inner surface 33b. Also,
The first fitting portion 23 of the upper box 7 is also formed with an inner step 39a and an outer step 39b having a step in the vertical direction corresponding to the projecting shape of the ridge 33, and an outer step. 39b is located below the inner step 39a. As a result, the outer side surface 35a of the concave groove 35 becomes the inner side surface 35a.
It is longer than b. Then, with the upper box 7 and the lower box 9 fitted and assembled,
The inner step portion 39a of the first fitting portion 23 abuts on the inner step portion 37a of the second fitting portion 27, and the outer step portion 39b of the first fitting portion 23 contacts the second fitting portion 27. Abut on the outer step 37b.

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 concave groove portion 35 The outer surface 35a, which is longer than the inner surface 35b, comes into contact with the outer surface 33a.
3 and the concave groove 35 can be fitted smoothly, and the upper box 7 and the lower box 9 can be easily assembled. In addition, since the inner surfaces 33b and 35b opposite to the contact portion are both shortened in the up-down direction to make the concave / convex fitting shallower than the contact portion, the fitting assemblability is deteriorated. There is no.

Further, the outer surface 33a of the ridge 33 and the outer surface 35a of the concave groove 35 are both lengthened in the vertical direction so that the concave and convex fitting is deeper than the inner surfaces 33b and 35b on the opposite side. As a result, the polyurethane injected into the heat insulating spaces C1 and C2 is prevented from leaking, and the sealing of the fitting portion can be ensured.

Before assembling the upper box 7 and the lower box 9, polyurethane is injected into the open lower box 9, and the upper box 7 is fitted into the lower box 9 to assemble the two. By doing so, there is no need to form an injection hole for injecting polyurethane into the hollow portion as in the case of an integral product formed by blow molding, and the productivity can be improved accordingly. Further, by injecting polyurethane into the open lower box 9, polyurethane is insulated into the heat insulating space C of the box body 3.
1, it can be spread to every corner in C2 to eliminate molding defects.

In the above embodiment, the ridge 33 is used.
Are projected from the second fitting portion 27 of the lower box 9, and the concave groove portions 35 are formed in the first fitting portion 23 of the upper box 7.
On the contrary, the ridge 33 protrudes from the first fitting portion 23 of the upper box 7 and the concave groove 35 is recessed into the second fitting portion 27 of the lower box 9. Even if it is provided, the same operation and effect can be obtained.

[0024]

As described above, according to the first aspect of the present invention, when the upper box and the lower box are fitted to each other and assembled, one of the outer surface and the inner surface of the ridge is provided.
The longer part in the vertical direction due to the step between the inner step part and the outer step part is brought into contact with the side surface of the concave groove part one foot earlier than other parts, so that the part is used as a guide to form the protrusion and the concave part. The fitting with the groove can be performed smoothly, and the upper box and the lower box can be easily assembled. In addition, since the opposite side of the contact portion is shorter in the vertical direction, the concave / convex fitting is made shallower than the contact portion, so that the fitting and assembling property is not impaired.

According to the second aspect of the present invention, in addition to the above-described effects, of the outer side surface and the inner side surface of the ridge portion, the longer one in the vertical direction due to the step between the inner step portion and the outer step portion. Since it is fitted deeply into the groove, leakage of the injected polyurethane can be reliably prevented. In addition, after injecting polyurethane into the open lower box, the upper box is fitted to the lower box and both are assembled, eliminating the need for drilling injection holes such as blow molding. Productivity can be improved.
Further, by injecting the polyurethane into the open lower box, the polyurethane can be spread to every corner in the hollow portion of the box main body, and molding defects can be eliminated.

[Brief description of the drawings]

FIG. 1 is an enlarged view of a portion A in FIG.

FIG. 2 is an exploded perspective view of FIG.

FIG. 3 is a sectional view taken along line III-III in FIG. 5;

FIG. 4 is an exploded perspective view of the 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 5 Upper lid 7 Upper box 9 Lower box 21 Inner wall 23 First fitting part 25 Outer wall 27 Second fitting part 29 Insulation material 33 Protrusion 35 Recessed groove 37a Inner step 37b Outer step

 ────────────────────────────────────────────────── ─── Continued on the front page F term (reference) 2B109 DA24 3E067 AA11 AB02 AC01 BA05A BB14A BB17A BC06A CA18 EA17 FA01 FC01 GA01 GA11 3L102 JA08 LB01 LB06 LB31 LB32 MA01 MB02 MB05 MB08 MB14

Claims (2)

[Claims] 1. A split box fitting structure in which a first fitting portion at a lower end of an upper box and a second fitting portion at an upper end of a lower box are fitted together to assemble the upper box and the lower box. A protruding ridge is provided on one of the first fitting portion and the second fitting portion so as to protrude along the edge and in a vertical direction. The inner step portion and the outer step portion that are in contact with one of the first fitting portion and the second fitting portion are formed so as to have a step in the vertical direction with respect to the ridge portion, A fitting structure for a split-type box, characterized in that one of the fitting portion and the second fitting portion is provided with a concave groove along the edge and into which the above-mentioned protruding portion is fitted. . 2. A cooler box having a box body having an opening through which a cold-reserved material is put in and out, and an upper lid for opening and closing the opening, wherein the box body is assembled with an upper box and a lower box. The upper box is bent from the upper end of the inner wall to the side of the box main body so as to have a heat-insulated space with respect to the inner wall having a bottom and a bottomed inner wall. The lower box is plate-shaped, is formed in a U-shaped cross section so as to have a heat insulating space with respect to the inner wall, and has an end. A second fitting portion that fits with the first fitting portion is formed at the edge, and the heat insulating space is filled with a heat insulating material made of polyurethane. Either one along the edge and above An inner step and an outer step contacting with one of the first fitting portion and the second fitting portion on the inside and outside of the box of the projecting portion. Is formed so as to have a step in the vertical direction with respect to the protrusion, and the protrusion is fitted into one of the first fitting portion and the second fitting portion along an edge. A cooler box characterized in that a concave groove portion is provided.