JP3140292B2 - Insulated box door device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a door device for a heat insulating box such as a refrigerator and a showcase.

[0002]

2. Description of the Related Art In recent years, a refrigerator having a double door has a rotary partition provided on the door.

A conventional refrigerator door device is disclosed, for example, in Japanese Utility Model Publication No. Sho 63-7823. Referring to FIGS. 8 and 9, a heat insulating box of a conventional refrigerator or the like will be described below. The door device will be described.

In FIGS. 8 and 9 showing a door device of a conventional heat-insulating box, a heat-insulating box 1 has a heat-insulating wall 4 filled with a foaming heat-insulating material interposed between an outer box 2 and an inner box 3. Formed,
It has an opening on the front. Each of the openings has a handle 5 on the non-pivot side, and a double door type first door 6A and a second door 6B that open and close the opening are pivotably supported. Gaskets 7A, 7B are provided on the peripheral edges of the back surfaces of the doors 6A, 6B. The gaskets 7A, 7B are located downward on the inner surface of the upper part of the heat insulating box 1 which faces the upper non-pivot side of the doors 6A, 6B. A guide protrusion 9 having a columnar shape is provided to be loosely fitted with a guide portion 8 'of the rotary partition member 8 described later. The back surface of the non-pivot side portion of the first door 6A has a length facing the side edge of the opening, and is rotatably supported by an axis parallel to the rotation axis of the first door 6A. A concave and curved groove 1 at one end
A rotary partition 8 having a guide portion 8 'formed with a zero is provided. Further, four legs 11 are provided on the lower surface of the heat insulating box 1, and a machine room 12 for a refrigeration device is formed on the upper portion. A compressor is provided above the machine room 12 and the heat insulating box 1. 13, condenser 14, evaporator 15, blower 1 for ventilation
6 and a unitized refrigerating device 18 including a blower 17 for cooling air circulation.

The operation of the door device of the heat insulating box constructed as described above will be described below.

In the closed state of the first door 6A, the rotary partition member 8 rotatably mounted on the back surface of the first door 6A on the non-pivot side.
Enter the opening of the heat insulating box 1 with the closing operation of the first door 6A, and the guide projection 9 fits into the groove 10 of the guide portion 8 formed at one end of the rotary partition 8 so that the rotary partition 8 When the gasket 7A provided on the back surface periphery of the first door 6A comes into close contact with the opening periphery of the heat insulating box 1, the closing operation is completed, and the rotary partition body 8 is in a state parallel to the first door 6A. It is fixed, and the space between the ends of the first door 6A and the second door 6B is made airtight.

[0007]

However, in the conventional door device of the heat insulating box, the rotary partition 8 is mounted on the first door 6A, and the rotary partition is closed when the first door 6A is closed. There is a problem in that a gap is generated between the heat sink 8 and the heat insulating box 1, and the amount of cold air leaking from the inside of the refrigerator increases, thereby reducing the heat retaining effect. Also, due to cold air leaking from inside the refrigerator,
In addition, there is a problem that sweating or frosting due to supercooling occurs in that portion.

According to the present invention, when the first door is closed, the rotary partition is held in a correct position, the rotary partition rotates smoothly, there is no cold air leakage, and the rotary partition is formed by frost during supercooling. It is an object of the present invention to obtain a door device of an insulated box that does not become unrotatable.

[0009]

In order to achieve the above object, in the door device for a heat insulating box of the present invention, the guide projection has a cylindrical shape having a constricted portion , and the guide partition has a groove formed in the guide portion of the rotary partition. An edge to be fitted with a constricted portion of the guide projection
Is attached .

It is effective that the groove provided in the guide portion of the rotary partition is wide on the entrance side and narrow on the rear side.

Further, a heater may be provided on the heat-insulating box body side on which the guide projection is mounted, and the guide projection may be made of a good heat conductor.

[0012]

In the door device of the heat-insulating box of the present invention having the above-mentioned structure, the guide projections are properly fitted into the guide portions of the rotary partition to rotate the rotary partition, so that the opening edge of the heat-insulating box is opened. And the gap between the rotating partition and the upper surface of the guide part can be always kept constant, reducing the cool air leakage from the gap,
Dew can be reduced.

Further, since the rotation of the rotary partition body is performed by fitting the constricted portion of the guide projection and the edge of the concave groove of the guide portion, the rotation can be smoothly performed. Heating can also prevent dew and frost from forming in the gap.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of a door device for a heat insulating box according to the present invention will be described below with reference to FIGS. Note that the same components as those described as the conventional example are denoted by the same reference numerals, and detailed description is omitted.

In FIGS. 1 to 5, a lower end is substantially constricted on the inner side of the upper portion of the heat insulating box 1 facing the upper portion of the non-pivot side of the first door 6A and the second door 6B. A cylindrical guide protrusion 20 is provided, and a concave and curved groove 22 having an edge fitted into a constricted portion 21 of the guide protrusion 20.
Is formed on the non-pivot side of the back surface of the first door 6A.

The operation of the door device for a heat-insulating box configured as described above will be described below.

The first door 6A as shown in FIG. 1 or FIG.
When the first door 6A shifts from the open state to the closed state of the first door 6A as shown in FIG. 2, the rotary partition member 19 rotatably mounted on the back surface of the first door 6A on the non-pivot side includes the first door 6A. With the closing operation of 6A, it enters into the opening of the heat insulating box, and the rotary partition 19
The constricted portion 21 of the guide projection 20 is fitted into a grooved concave curved surface 22 formed on the guide portion 19 ′ provided at the upper end of the guide projection 19 ′, and moves while contacting the curved surface of the groove 22.
And a gasket 7A provided on the periphery of the back surface of the first door 6A.
However, when it comes into close contact with the periphery of the opening of the heat insulating box 1, the closing operation of the first door 6A is completed, and the rotary partition 19 is in a state parallel to the first door 6A and completes the rotation, as shown in FIG. State.

As described above, according to this embodiment, the guide projection 20 has a substantially cylindrical shape having a constricted portion 21, and the guide portion 19 ′ of the rotary partition 19 has an edged concave and curved surface. a groove 22, the constricted portion 21 and the groove 22
With the configuration in which the edges are fitted, a gap between the opening edge of the heat-insulating box 1 and the rotary partitioning body 19 can be always kept airtight, so that dew can be minimized.

As shown in FIG. 6, the concave and curved groove 22 formed in the guide portion 19 'of the rotary partition 19 provided on the back surface of the non-pivot side portion of the first door 6A is provided at the entrance. When the width a is wide in the vertical direction and the width b in the back is narrow, the first door 6
Rotating partition 1 that has entered the opening with the closing operation of A
9 has a wide entrance of the groove 22 of the guide portion 19 'and is easily fitted with the guide projection 20, so that the rotation can be smoothly performed.

Further, as shown in FIG. 7, when a heater 23 is provided at the upper end of the guide projection 20 in the heat insulating box 1 and the guide projection 20 is formed of a good conductor, the upper part of the rotary partition 19 is formed. It is also possible to prevent dew sticking by minimizing cold air leakage in a gap between the heat insulating box 1 and the heat insulating box 1, and to prevent the rotary partition 19 from rotating due to frost during supercooling.

[0021]

Since the present invention is configured as described above, it has the following effects.

Since the edge of the concave groove of the guide portion fits into the constriction of the guide projection, the gap between the opening edge of the heat insulating box and the rotary partition can be airtightly secured, thereby reducing cold air leakage and reducing Sticking can be reduced.

When the entrance of the guide portion is widened, the first
The rotation of the rotary partition with the closing operation of the door becomes smooth,
When the heat-insulating box is provided with a heating section and the guide projection is made of a heat conductor, the heat conduction of the guide projection can prevent the gap between the opening edge of the heat-insulating box and the rotary partition from being exposed.

[Brief description of the drawings]

FIG. 1 is a perspective view of a main part of a door device of an insulated box body in an open state according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of a main part of the heat-insulating box body in a door-closed state of the door device.

FIG. 3 is a sectional view of a main part of the door device of the heat-insulating box in a door open state.

FIG. 4 is a side view of a guide projection in the door device of the heat insulating box.

FIG. 5 is a perspective view of a guide portion in the door device of the heat insulating box.

FIG. 6 is an explanatory sectional view of a guide portion in the door device of the heat-insulating box.

FIG. 7 is an explanatory sectional view of a mounting portion of a guide projection in the door device of the heat-insulating box.

FIG. 8 is a longitudinal sectional view of a conventional door device of a heat insulating box.

FIG. 9 is a perspective view of a door device of the heat insulating box.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Insulated box 6A 1st door 6B 2nd door 19 Rotating partition 19 'Guide part 20 Guide protrusion 21 Constriction part 22 Groove 23 Heater

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int. Cl. ⁷ , DB name) F25D 23/02 305

Claims (3)

(57) [Claims] 1. A cylindrical guide projection is provided on an upper inner surface of a heat insulating box facing an upper part on a non-pivot side of a double door that is rotatably supported by an opening of the heat insulating box, A door device for an insulated box body , wherein a rotatable partition body rotatably mounted on the non-pivot side of one of the doors is provided with a guide portion having a concave groove into which the guide projection is fitted . , Said guy
A constriction is formed in the projection, and the guide
An edge for fitting the constricted portion of the guide projection into the groove.
A door device for a heat-insulating box , characterized by being attached . 2. A groove formed in a guide portion of the rotary partition body,
2. The door device for an insulated box according to claim 1, wherein the entrance is wide and the inside is narrow. 3. A heat-insulating box body is provided with a heater at a mounting portion of the guide protrusion, and the guide protrusion is formed of a good heat conductor.
The door device of the heat-insulated box described in the above.