JPH0926259A - Part for heat-insulating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a part for heat-insulating device including a reduced num ber of constituent parts to make assembling operation easy by forming a continu ous belt-like protrusion on an opening portion of a box-shaped resin-molded body having a heat-insulating layer in an interior thereof and fixing a rear plate on the belt-like protrusion. SOLUTION: A door main body is made as a box-shaped resin-molded body 2 formed by injection molding, and a continuous belt-like protrusion 3 is integrally formed on an opening portion 4 thereof. An interior of the box-shaped resin- molded body 2 is injected and packed with polyurethane resin, which is then foamed in order to form a heat-insulating layer 5. A rear plate 6 is attached to the belt-like protrusion 3. The door main body is formed by first forming a heat-insulating layer 5 in the interior of the box-shaped resin-molded body 2 formed simultaneously and integrally with the belt-like protrusion 3 by injection molding and then attaching the rear plate 6 on the belt-like protrusion 3. Thus, the number of constituent parts is reduced so that jointed portions of the constituent parts are reduced and leakage of resin composite does not occur at the time of forming the heat-insulating layer 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a member for a heat insulating device such as a door of a freezing room or a refrigerating room in a freezer refrigerator, an end plate of a drawer of a vegetable room, or a door of a warm storage room in a warm storage. Is.

[0002]

2. Description of the Related Art A conventional heat retaining device door, for example, an electric refrigerator door will be described with reference to FIGS.

In FIG. 5, FIG. 6, FIG. 7 and FIG.
Reference numeral 1 is a door body, 12 is a front plate of a door body 11 formed of a steel plate, and one rising side portion 13 is formed by bending one side edge facing each other.
It has a U-shaped cross section. Reference numeral 14 is a side member of the door body 11, and has a groove portion 15 at one end into which the other side edge of the front plate 12 is fitted. Reference numeral 16 is a frame body having a groove portion 17 into which the end portion of the rising portion 13 of the front plate 12 and the other end of the side member 14 are fitted, 18 is a back plate of the door body 11 adhered to the frame body 16, and 19 is a heat insulating layer. .

The door body 11 is fitted with the other side edge of the front plate 12 into the groove 15 of the side member 14 to form a box-shaped body. The open end of the box-shaped body, that is, the rising portion of the front plate 12. Thirteen
And the other end of the side member 14 are fitted into the groove 17 to fix the frame body 16, and the back plate 18 is adhered to the frame body 16 to form a hollow body, and a heat insulating resin composition is provided inside the hollow body. The material is injected and filled to form the heat insulating layer 19, which has heat insulating properties.

[0005]

In the conventional heat retention device door having the above-described structure, the door body 11 is the front plate 1.
Since it is formed of a large number of parts such as two or two side members 14, the frame body 16 and the back plate 18, the assembly thereof is complicated and there is a problem that the assembly takes time.

Further, since the heat insulating layer 19 is formed by injecting and filling the resin composition into the inside of the hollow body formed by assembling a large number of parts and foaming the resin composition, the resin composition is formed from the joint between the parts. There is a problem that it is difficult to form a heat insulating layer having a uniform thickness due to leakage, and further, since the front plate 12 is made of a steel plate having good heat conduction, heat is dissipated and the heat insulating effect is not sufficient. .

Further, in order to increase the strength of the door body 11,
A large number of vertical ribs are provided at the corners inside the box-shaped body for reinforcement, but these vertical ribs hinder the injection of the resin composition, and the inside of the box-shaped body is uniformly filled. There was a problem that it was difficult.

According to the present invention, the number of parts is reduced to facilitate the assembly, the resin composition does not leak, and a heat insulating layer having an excellent heat insulating effect that can be uniformly filled and filled in every corner is formed. It is an object of the present invention to provide a member for a heat retaining device which is formed of a resin molded body and has a more excellent heat insulating effect.

[0009]

In order to achieve the above object, in the member for a heat insulating device of the present invention, a strip-shaped ridge continuous to the opening of the box-shaped resin molded body in which a heat insulating layer is formed is formed. The back plate is integrally molded and the back plate is fixed to the strip-shaped ridge.

[0010]

In the member for the heat retaining device configured as described above, a box-shaped body having a heat insulating layer formed by filling a heat insulating material inside is formed of resin, and the opening of the box-shaped body is formed in the opening. Since the strip-shaped ridges for fixing the back plate holding the heat insulating layer are integrally formed, the parts forming the member for the heat retaining device are excellent in heat insulating property, and the number thereof is reduced.

Further, since the number of parts is small, it is possible to form a uniform heat insulating layer having excellent heat insulating effect by reducing the number of joints of parts having a fear of leaking the resin composition when forming the heat insulating layer. You can

Further, since the box-shaped body is formed of resin and the strip-shaped ridge is integrally formed in the opening, the strength of the box-shaped body is increased. As a result, the box-shaped body is reinforced for reinforcement. The vertical ribs are no longer required, and the resin composition smoothly flows into every corner and is injected and filled to form a heat insulating layer having a uniform thickness.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A door for an electric refrigerator in an embodiment of a member for a heat insulating device according to the present invention will be described with reference to FIGS.

In FIGS. 1, 2, 3 and 4, 1
Is a door body, 2 is a box-shaped resin molded body, 3 is a box-shaped resin molded body 2.
A continuous strip-shaped ridge formed by being integrally formed in the opening 4 of the box 5, a heat insulating layer formed by filling the inside of the box-shaped resin molded body 2 with a heat insulating resin composition, and 6 a strip-shaped projection The back plate adhered to the strip 3 holds the magnetic material 7 which holds the door closed.

The door body 1 is formed with a box-shaped resin molded body 2 by injection molding, and a strip-shaped ridge 3 is continuously and integrally formed in the opening 4 of the box-shaped resin molded body 2. A heat insulating layer 5 is formed by injecting and filling a polyurethane resin into the inside of the above to form a heat insulating layer 5, and a back plate 6 is adhered to the strip-shaped ridge 3. In order to assemble this door body 1, a resin is injection-molded, and at the same time, a heat insulating layer 5 is formed inside a box-shaped resin molded body 2 in which a continuous strip-shaped protrusion 3 is also integrally formed. Since the back plate 6 may be adhered to the back plate 6, the number of parts is reduced to facilitate the assembly, and since the number of parts is small, the number of joints between the parts is reduced and the resin composition is used when the heat insulating layer 5 is formed. The resin composition does not leak, and the resin composition smoothly flows into the corners in every corner to form the uniform heat insulating layer 5.

Further, since the strip-shaped ridge 3 is continuously and integrally molded in the opening 4 of the box-shaped resin molded body 2, the strength of the box-shaped resin molded body 2 has a special vertical rib. Even without it, the resin composition can be sufficiently reinforced, and the resin composition can be smoothly injected and filled, so that the heat insulating layer 5 has a uniform thickness and spreads to every detail to improve the heat insulating effect.

In order to perform injection molding of the box-shaped resin molding 2 in which the strip-shaped protrusion 3 continuous with the opening 4 is formed by injection molding, an undercut portion continuous with the opening 4 is formed by the strip-shaped protrusion 3. Therefore, it is effective to perform injection molding using a mold having the following configuration. That is, the movable-side mold that forms the cavity portion with the fixed-side mold is composed of the side core and the corner core, and the side core has the undercut portion formed in the linear portion of the box-shaped resin molded body 2 on the outer peripheral portion thereof. Is provided, and the corner core is provided with a ridge piece that forms an undercut portion in the bent portion of the box-shaped resin molded body 2 on the outer peripheral portion thereof. Then, the side cores can be moved inward, the corner cores can be vertically moved and also moved inward, and the mold can be released, or the side cores can be largely moved inward, and the corner cores The undercut portion can be easily formed by releasing the mold so that it can move inwardly smaller than the above.

[0018]

EFFECTS OF THE INVENTION Since the present invention is constructed as described above, it is possible to easily assemble a heat insulating member having a good heat insulating structure, excellent heat insulating properties, and sufficient mechanical strength.

[Brief description of drawings]

FIG. 1 is a top perspective view of a door for an electric refrigerator according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA in FIG.

3 is a sectional view taken along line BB in FIG.

FIG. 4 is an exploded perspective view of a box-shaped body in the electric refrigerator door.

FIG. 5 is a top perspective view of a conventional electric refrigerator door.

6 is a cross-sectional view taken along the line CC of FIG.

7 is a cross-sectional view taken along the line DD in FIG.

FIG. 8 is an exploded perspective view of a box-shaped body in the electric refrigerator door.

[Explanation of symbols]

 2 Box-shaped resin molded body 3 Strip-shaped protrusions 4 Openings 5 Thermal insulation layer 6 Back plate

Claims (1)

[Claims] 1. A member for a heat retaining device having a box-shaped resin molded body in which a strip-shaped ridge continuous to an opening is integrally molded and filled with a heat insulating material, and a back plate fixed to the strip-shaped ridge. .