JPH079342B2 - Insulation box - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application] The present invention relates to a heat insulating box body such as a freezer in which a space formed by both inner and outer boxes is filled with a foamed heat insulating material.

2. Description of the Related Art Various proposals have been made for this type of heat insulating box,
Among them, for example, in Japanese Utility Model Publication No. Sho 53-135856,
Insert the bottom plate into the outer box with a plurality of holes and inward flanges formed on the side surface and place it on the flange, and seal the corners of the outer box side surface and the bottom plate with a blocker to put it inside the outer box. It is disclosed that an inner box is inserted to form a space between both boxes, and a foaming heat insulating material is injected into the space and cured.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention In the conventional technique, when the heat insulating box is slidably transferred by legs or casters provided on the lower surface of the heat insulating box, there is some protrusion on the floor surface to be moved. When a leg or a caster hits this protrusion, a horizontal force is applied to the leg or the caster, and the lower surface and the side surface of the heat-insulating box body to which the leg or the caster is fixed are bent, which may affect the inward flange. Then, the bottom plate could not be kept horizontal.

Therefore, the present invention provides a heat-insulating box body provided with a reinforcing member that prevents the box body from being affected even when some impact is applied in relation to the floor surface during sliding movement of the heat-insulating box body. This is a technical issue.

[Structure of Invention]

Means for Solving the Problems The heat-insulating box body of the present invention includes an outer box having curved surfaces formed at the respective corners of the peripheral side surface, an inner box provided inside with a space from the outer box, and an inner box. And a top plate that is provided under the bottom wall of the unit at a distance to define a machine room together with the lower part of the outside, a foam insulation material filled in a space formed by the outer box, the inner box and the top plate, and A support member attached to the lower end of each corner of the box 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 reinforcing member, the lower end abuts the frame member, A support part extending upward along the inner surface of the outer box, a mounting part extending inward from the support part in contact with the lower surface of the top plate, and an opening extending upward from an appropriate place of the mounting part to form the top plate. It is composed of a rising part which penetrates and has a hole formed therein.

Action When filling the foamed heat insulating material (6), the holes (35) (35) formed in the rising portion (34) act as a heat insulating material passage when the undiluted solution of the heat insulating material gradually foams, and the heat insulating material ( After the filling of 6), the heat insulating material (6) penetrates the holes (35) (35) and adheres to the surface of the rising portion (34), so that the rising portion (34) comes out of the foamed heat insulating material (6). The reinforcing member (30) acts to prevent downward deformation of the frame member (12) and the inward flange (9).

Embodiment An embodiment 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 upper surface, and a spot-type refrigerated showcase will be described as an example. (2) is a heat insulation box body as a main body of the low temperature chamber (1), and has an outer box (3) made of, for example, a metal with curved surfaces formed at respective corners of the peripheral side surface, and a space between the outer box (3). A metal inner box (4) provided with a bottom wall and an upper surface opening, and a machine room together with a lower part of the outer box (3) provided below the bottom wall of the inner box (4) with a space therebetween. Foam insulation such as foamed polyurethane that is filled between the top plate (5) that defines the inner space, the inner box (4) and the outer box (3), and between the inner box (4) and the top plate (5). And the material (6). A cooling pipe (7) is placed in contact with the outer surface of the inner box (4).

On the other hand, curved surfaces are formed at the four corners of the peripheral side surface of the outer box (3), and slits (8) for sucking or blowing air are formed in the lower part of the peripheral side surface. In addition, normal PCM
(Pre-coat manufacturing) In the case of bending each corner after painting because the bent part is formed by the manufacturing method, that is, the method of forming the respective corners by painting after painting the metal plate Each corner is formed on a curved surface in order to prevent paint from falling off at the bent portion. Further, inward flanges (9) are formed at the lower end of the outer box (3) and are bent inward in the horizontal direction. Further, curved surfaces are also formed on the four corners of the peripheral side surface of the inner box (4). And, in the lower part of the inner surface at the 4th corner of the outer box (3),
A reinforcing plate (10) made of, for example, a metal, which is curved so as to bulge outward while avoiding the slit (8), is provided.
A flexible cushioning material (11) such as foamed polyethylene is provided between 0) and the inner surface of the corner.
(12) is an annular frame member placed on the inward flange (9) so as to abut against the inside of the lower end of the outer box (3), and is formed, for example, by bending a metal plate into a substantially U-shaped cross section. The inner and outer rising pieces (13, 14) are provided, and the corner portion (15) corresponding to the shape of the corner is formed. The reinforcing plate (10) is fixed by, for example, electric welding so that the lower end of the reinforcing plate (10) abuts the frame member (12) and the lower part thereof 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,
Its upper end is located in the foam insulation (6) layer. still,
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 described. FIG. 4 shows a developed state of the frame member (12), in which notches are formed at four positions. The notch has a corner side (16) formed corresponding to the corner portion (15) of the frame member (12) and opening sides (17) (17) extending from both ends of the corner side (16).
And the contact sides (18) extending from these opening sides (17) (17)
(18) and is formed from. Then, after bending the bending sides (19) and (19) shown by the two-dot chain line in FIG. 4 at a substantially right angle to form inner and outer rising pieces (13) and (14), corners are formed. The frame member (12) is manufactured by subjecting the portion (15) to a R bending process to bring the contact sides (18) and (18) into contact with each other and connecting them by, for example, electric welding.

Further, (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 as shown in FIG. 3) A caster mounting portion (21) that overlaps the lower surface of the inward flange (9) and is fixed to the inward flange (9) together with the frame member (12) by screws (not shown) inserted from below.
And an inner rising piece of two sides that are bent and adjacent to each other (13)
It is composed of a flange (22) located between the corners of (13). A caster (24) as a leg member that comes into contact with the floor surface is fixed to the lower surface of the caster mounting portion (21) with a screw (23). The caster mounting plate (20) and the casters (24) form a support member.
The leg material is not limited to the caster (24) and may be a pillar.

Furthermore, the top plate (5) is made of a metal plate,
Arc-shaped notches are formed at the four corners corresponding to the reinforcing plate (10), and flanges (25) are formed by bending downward between the notches. A sealing material (26) is provided between the flange (25) and the inner surface of the outer box (3). The foam heat insulating material (6) is in contact with the upper surface of the top plate (5).

Reference numeral (30) is a reinforcing member formed by bending a metal plate and maintaining a space between the top plate (5) and the lower end of the outer box (3). The reinforcing member (30) has a lower end abutting against the frame member (12) and fixed by welding or the like, and a supporting portion (31) extending upward from the lower end along the inner surface of the outer box (3) and the supporting member (31). A mounting portion (32) that is bent from the portion (31) and abuts the lower surface of the top plate (5) and extends inward, and a top portion that extends upward from an appropriate place of the mounting portion (32), for example, the top. It comprises a rising part (34) which penetrates the reinforcing member opening (33) formed in (5). And
The support portion (31) and the mounting portion (32) are formed in a U-shaped cross section,
Further, holes (35) (35) for passing a heat insulating material are formed in the rising portion (34), and the reinforcing member opening (33) is sealed by the sealing member (36) after penetrating the rising portion (34). . The rising portion (34) is for positioning when the top plate (5) is placed.

FIG. 6 is a vertical cross-sectional view of a foaming jig and each part of the heat insulating box, which relates to a foam insulating material filling step at the time of manufacturing the heat insulating box.
The inner box (4), the outer box (3), the top plate (5) and the breaker are supported in the (41), (42) and (43). Then, in the lower part of the space (P) defined by the inner box (4), the outer box (3), the top plate (5), and the breaker, the heat insulating material for injection into the foaming jig (43) is injected. The front end opening of the injection pipe (45) faces through the recess (44) and the injection port of the outer box (3).
Here, the undiluted solution of the foamed heat insulating material discharged from the injection pipe (45) hits the inner surface of the outer box facing the injection pipe (45) (however, the tip of the pipe (45) and the inner surface of the outer box (3) The rising part (34) of the reinforcing member (30) is not located on the straight line connecting the two. Then, the undiluted solution of the heat insulating material gradually foams from the hit part, and is transmitted to the holes (35) (35) formed in the rising part (34) of the reinforcing member (30) and the surface of the rising part (34) and rises. It flows to the back surface of (34), that is, the surface on the injection pipe (45) side, and gradually fills the space (P).

Here, the undiluted solution of the heat insulating material is the holes (35) (35) and the rising portions (3) of the rising portions (34) of the reinforcing member (30) as the foaming proceeds.
4) Since it is transmitted to the surface and reaches the back surface side of the rising portion (34), voids or voids are not generated around the rising portion (34). Moreover, since the rising portion (34) does not block the flow of the undiluted solution of the heat insulating material and the direction of foaming, it is possible to obtain a heat insulating box having a substantially uniform foam density. Further, the reinforcing member (30) not only functions as a spacer for maintaining the space between the top plate (5) and the frame member (12) at a predetermined space, but the foam heat insulating material (6) has holes (35) ( Since it penetrates 35), it is possible to obtain a resistance force against a force parallel to the rising portion (34) that functions to position the top plate (5), that is, a force in the vertical direction, and the rising portion from the heat insulating material layer is obtained. It is possible to avoid the omission of (34). For this reason, the reinforcing member (30) acts to reduce the impact such as the lifting force transmitted from the support member to the frame member (12) and the inward flange (9) of the outer box (3), and the frame member. The deformation of the (12) and the inward flange (9) and the inclination of the caster (24) can be avoided.

〔The invention's effect〕

As described above in detail, according to the present invention, since the hole formed in the rising portion for positioning serves as a passage in the foaming process of the heat insulating material, it is possible to avoid generating a void around the rising portion, The foaming density can be made uniform without hindering the flow of the heat insulating material stock solution and the progress of foaming. Also,
Since the heat insulating material penetrates through the holes after foaming, the upright part is more firmly embedded in the heat insulating material layer, and resistance to external force in the vertical direction is obtained, and escape from the heat insulating material on the upright part is avoided. In addition, it is possible to suppress deformation such as distortion of the frame member and the outer box.

[Brief description of drawings]

Each drawing shows one embodiment of the present invention, FIG. 1 is an enlarged perspective view of a lower corner of a box body, FIG. 2 is an external perspective view of a heat insulating box body, and FIG. 3 is a sectional view taken along line AA of FIG. 4 is a development view of the frame member, FIG. 5 is a perspective view of the frame member, and FIG. 6 is a vertical cross-sectional view of a jig and a box body at the time of filling the foam heat insulating material. (2) ... Insulation box, (3) ... Outer box, (4) ... Inner box, (5) ... Top plate, (6) ... Foam insulation, (9) ...
… Inward flange, (12) …… frame member, (30) …… reinforcing member, (31) …… supporting part, (32) …… resting part, (34)…
… Upright, (35) …… hole.

Claims (1)

[Claims] 1. An outer box in which curved surfaces are formed at respective corners of a peripheral side surface, and an inner box provided inside the outer box with a space therebetween.
A top plate provided below the bottom wall of the inner box with a space therebetween to define a machine room together with the lower part of the outer side, and a foam filled in a space formed by the outer box, the inner box and the top plate. A heat insulating box body comprising a heat insulating material and a support member attached to the lower end of each corner of the outer box and in contact with the floor surface, comprising an annular frame member provided inside the lower end of the outer box, and a reinforcing member. The reinforcing member includes a supporting portion whose lower end is in contact with the frame member and extends upward along the inner surface of the outer box, and a mounting portion which extends inward from the supporting portion in contact with the lower surface of the top plate. A heat-insulating box body which extends upward from an appropriate position of the mounting portion and penetrates an opening formed in the top plate and a rising portion having a hole formed therein.