JPS63176984A - Heat-insulating box body - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] Industrial Field of Use The present invention relates to a heat insulating box for a freezer or the like, in which a space formed by both an inner and outer box is filled with a foamed heat insulating material.

Conventional technology Various proposals have been made for this type of insulation box.
Among them, for example, in Japanese Utility Model Application Publication No. 53-135856, a bottom plate is inserted into an outer box having a plurality of holes and an inward flange formed on the side surface, and is placed on the flange.
The corners of the sides of the outer box and the bottom plate were sealed with a sealing material, the inner box was inserted into the outer box to form a space between the two boxes, and the foam insulation material was injected into this space and allowed to harden. something is disclosed.

Problems to be Solved by the Invention In the conventional technology described above, when the insulating box is slid by legs or casters provided on the lower surface of the insulating box, there is some protrusion on the floor surface to be moved. When a leg or caster hits this protrusion, a horizontal force is applied to the leg or caster, causing deflection on the bottom and side surfaces of the insulating box to which the leg or caster is fixed, which affects the inward flange. In some cases, the bottom plate could not be kept horizontally.

Therefore, the present invention aims to provide a heat insulating box equipped with a reinforcing member that prevents the box from being affected even if some impact is applied in relation to the floor surface during sliding movement of the heat insulating box. Consider it a technical issue.

[Structure of the invention]

Means for Solving the Problems The insulating box body of the present invention comprises an outer box having a curved surface formed at each corner of the circumferential side, an inner box provided inside the outer box with a space therebetween, and an inner box. a top plate provided at intervals below the bottom wall of the box and defining a machine room together with the lower part of the outer box; and a foam insulation material filled in the space formed by the outer box, the inner box, and the top plate; The outer box includes a supporting member attached to the lower end of each corner and in contact with the floor surface, an annular frame member provided inside the lower end of the outer box, and a reinforcing member, the lower end of which is in contact with the frame member. , a support portion extending upward along the inner surface of the outer box, a placing portion extending inward from the support portion in contact with the lower surface of the top plate, and an opening formed in the top plate extending upward from a proper position of the placement portion. It consists of an upright part that penetrates through the hole and has a hole formed therein.

Function When filling the foamed heat insulating material (6), the holes (35) (35) formed in the upright part (34) act as a heat insulating material passage when the stock solution of the insulating material gradually foams, and the insulating material ( After filling in step 6), the insulation material (6) penetrates through the holes (35) (35) and is in close contact with the surface of the upright part (34), so the upright part (34) comes out of the foamed insulating material (6). The reinforcing member (30) acts to prevent downward deformation of the frame member (12) and the inward flange (9).

EXAMPLE An example of the present invention will be described below with reference to FIGS. 1 to 6.

(1) is a low-temperature refrigerator having an opening on the top surface, and will be explained using a spot-type refrigerated showcase as an example. (2) is an insulated box body as the main body of the low temperature refrigerator (1), and there is an outer box (3) made of metal, for example, with curved surfaces formed at each corner of the circumferential side, and an interval between the outer box (3) and the outer box (3). A metal inner box (4) is provided with a bottom wall and a top opening, and a machine room is provided with a space below the bottom wall of the inner box (4) together with the lower part of the outer box (3). The top plate (5) that defines the inner box (4) and the outer box (
3) and a foamed heat insulating material (6) such as foamed polyurethane filled between the inner box (4) and the top plate (5).

Note that a cooling pipe (7>) is disposed in contact with the outer surface of the inner box (4).

On the other hand, curved surfaces are formed at four corners of the circumferential side of the outer box (3), and slits (8) for sucking or blowing air are formed at the lower part of the circumferential side. In addition, ijoPcM
(Bure Coat Manufacturing) A manufacturing method in which a metal plate is painted and then bent to form each corner.In order to form a bent part, each corner is bent after painting. Each corner is formed into a curved surface to avoid paint fading at the bends. Inward flanges (9) are formed at the lower ends of the outer boxes (3), respectively, and are bent horizontally inward. In addition, the inner box (4
) curved surfaces are also formed at the four corners of the circumferential side. At the lower part of the inner surface of the four corners of the outer box (3), reinforcing plates (10) made of metal, for example, are provided which are curved to bulge outward avoiding the slits (8).
A flexible cushioning material (11), such as foamed polyethylene, is provided between the inner surface of the corner and the inner surface of the corner. (1
2) is an annular frame member placed on the inward flange (9) so as to come into contact with the inside of the lower end of the outer box (3), and is formed, for example, by bending a metal plate to have a substantially U-shaped cross section. , medial and lateral rising pieces (
13) and (14), and also forms a corner part (15) corresponding to the shape of the corner. In addition, the lower end of the reinforcing plate (10) is fixed by, for example, electric welding so that it abuts the frame member (12), and its lower part overlaps the inner surface of the outer rising piece (14) of the frame member (12). ing.

Further, the upper part of the reinforcing plate (10) extends upward from the top plate (5) of the machine room, and its upper end is located within the foam insulation layer (6). Note that the frame member (12) is for improving the strength of the lower end of the outer box (3).

Next, a method for manufacturing the frame member (12) will be explained.

Figure 4 shows the expanded state of the frame member (12), with four notches.
It is formed in places. This notch is a corner side formed corresponding to a part of the corner (15 inches) of the frame member (12).
16), opening sides (17) (17) extending from both ends of this corner side (16), and these opening sides (17) (17).
) and contact sides (18) (18) extending from the contact sides (18) (18).

Then, the bent side (19) indicated by the two-dot chain line in Fig. 4
(19), bend the inner and outer rising pieces (13) at approximately right angles.
) (14), a part of the corner (15) is subjected to an R bending process so that the abutting sides (18) (18>) are in contact with each other, and each is connected by, for example, electric welding to form a frame member (12). is manufactured.

Also, (20) is a caster mounting plate provided at the four corners of the lower end of the outer box (3), and this caster mounting plate (20)
is formed of a metal plate, and the outer box (3
) overlaps the lower surface of the inward flange (9) of the inward flange (9), and a screw (not shown) inserted from below
The caster mounting part (12) fixed together with the frame member (12)
21〉, and a flange (13) located between a part of the corner of the bent inner rising pieces (13) on two adjacent sides (13).
22). Casters (24) as leg members that come into contact with the floor are fixed to the lower surface of the caster attachment portion (21>) by screws (23).

The caster mounting plate (20) and the caster (24) constitute a support member. In addition, casters (24
), but may also be a pedestal.

Furthermore, the top plate (5) is formed of a metal plate,
Arc-shaped notches are formed at the four corners to correspond to the reinforcing plates (10), and flanges (25) are formed by bending downward between the respective notches. And the flange (25
) and the inner surface of the outer box (3) is provided with a sealing material (26). In addition, foam insulation material (
6) are in contact.

(30) is a reinforcing member that is formed by bending a metal plate and maintains the distance between the top plate (5) and the lower end of the outer box (3). This reinforcing member (30) has a lower end that abuts against the frame member (12) and is fixed by welding or the like, and has a support portion (31) that extends upward from this lower end along the inner surface of the outer box (3), and Part (31
) is bent from the top plate (5) and extends inwardly into contact with the lower surface of the top plate (5); ) and a rising part (34) that passes through a reinforcing member opening (33) formed in the opening (33). In addition, holes (35) (35) for passing the heat insulating material are formed in the rising part (34), and the reinforcing member opening (33) is formed in the sealing member (36) after passing through the rising part (34).
) is sealed. In addition, the rising part (34) is the top plate (5
) is used for positioning when placing.

Figure 6 is a vertical cross-sectional view of the foaming jig and various parts of the insulation box during the process of filling the foamed insulation material during the manufacture of the insulation box.
) (41 bar 42) (43) has an inner box (4) and an outer box (3)
, a top plate (5) and a breaker are supported. and,
A foaming jig (4) is installed at the bottom of the space (P) defined by the inner box ('4), outer box (3), top plate (5), and breaker.
3) and the outer box (
The tip opening of the injection vibrator (45) faces through the injection port 3). Here, the undiluted solution of the foam insulation material discharged from the injection vibrator (45) hits the inner surface of the outer box facing the injection pipe book (45) (however, the tip of the vibrator (45) and the inner surface of the outer box (3) The upright part (34) of the reinforcing member (30) is not located on the connecting straight line). Then, the raw material of the insulation material gradually foams from the part where it hits, and the reinforcing material (
Holes (35) (35) formed in the rising part (34) of (30)
) and the surface of the rising part (34) to form the rising part (34).
, that is, the surface on the side of the injection vibrator (45), and gradually fills the space (P).

Here, as the foaming progresses, the undiluted solution of the heat insulating material is transmitted through the holes (35) (35) and the surface of the upright part (34) of the reinforcing member (30) to the upright part (34). Since it reaches the back side, no voids or gaps are generated around the raised part (34). Moreover, since the rising part (34) does not obstruct the flow of the stock solution of the heat insulating material and the direction in which the foaming progresses, it is possible to obtain a heat insulating box with a substantially uniform foam density. Further, the reinforcing member (30) is attached to the top plate (5) and the frame member (12).
), the foamed heat insulating material (6) not only acts as a spacer to maintain a predetermined distance between the holes (35) (35
), it is possible to obtain a force parallel to the upright part (34) that acts to position the top plate (5), that is, a resistance force against vertical force, and the upright part (34) from the insulation layer can be obtained. 34) can be avoided. For this reason, the reinforcing member (
30) acts to alleviate the impact such as lifting force transmitted from the support member to the frame member (12) and the inward flange (9) of the outer box (3). Deformation of the flange (9) and tilting of the caster (24) can be avoided.

〔Effect of the invention〕

As described in detail above, according to the present invention, the holes formed in the upright part for positioning serve as passages during the foaming process of the heat insulating material, so it is possible to avoid creating voids around the upright part, and The foaming density can be made uniform without interfering with the flow of the heat insulating material stock solution or the progress of foaming. Also,
Since the insulation material penetrates through the holes after foaming, the rising part is more firmly embedded in the insulation layer, providing resistance against external forces in the vertical direction, and preventing the rising part from coming off from the insulation material. At the same time, deformation such as distortion of the frame member and the outer box can be suppressed.

[Brief explanation of the drawing]

Each figure shows an embodiment of the present invention. Figure 1 is an enlarged perspective view of the lower part of the corner of the box, Figure 2 is an external perspective view of the heat-insulating box, and Figure 3 is a sectional view taken along line A-A in Figure 1. , FIG. 4 is a developed view of the frame member, FIG. 5 is a perspective view of the frame member, and FIG. 6 is a vertical sectional view of the jig and box body when filling the foam insulation material. (2>...Insulated box body, ri3)...Outer box, (4)
... Inner box, (5) ... Top plate, (6) ... Foam insulation material, (9) ... Inward flange, (12) ...
・Frame member, (30)... Reinforcement member, <31)...
Support part, (32)... Placement part, (34)... Standing part, (35)... Hole.

Claims (1)

[Claims] 1. An outer box in which a curved surface is formed at each corner of the circumferential side, an inner box provided inside with a space between the outer box and the bottom wall of the inner box, and a space provided below the bottom wall of the inner box. a top plate that defines a machine room together with the lower part of the outer box; a foam insulation material filled in the space formed by the outer box, the inner box, and the top plate; and a foam insulation material that is attached to the lower end of each corner of the outer box. and a support member in contact with a floor surface, the insulating box body comprising an annular frame member provided inside a lower end of the outer box and a reinforcing member, the reinforcing member having a lower end in contact with the frame member. a support portion extending upward along the inner surface of the outer box; a mounting portion extending inward from the support portion in contact with the lower surface of the top plate; and a mounting portion extending upward from a proper position of the placement portion and the top plate. 1. A heat insulating box body characterized by comprising an upright part having a hole formed therein and passing through an opening formed in the body.