JP2000320951A - Heat insulation door of refrigerator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve low-cost mass productivity suited for reduction of the number of parts, simplification of an assembling process, and automated assembly, in heat insulation door structure used in a refrigerator. SOLUTION: This heat insulation door comprises a lock part 32 for mounting a gasket formed in a wedge-form state engaged with a wedge-form mounting part approximately in a plate-form state by vacuum molding and situated at a gasket integrally with its outer periphery; a door back plate 31 at the outer periphery of which the bowed flange piece is formed; and a door surface plate 34 positioned opposite to an peripheral inner surface 35 of an injection-molded product formed in the shape of a container by using synthetic resin, and having protruding door back plate joining ribs 37 having a plurality of notch parts. The flange piece in a bowed shape and the door back plate joining rib 37 are brought into contact with each other, the outer periphery of the door back plate 31 is inserted in the peripheral inner surface 35 of the door back plate, and a forming heat insulation material 26 is injected and foamed between the door back plate 31 and the door surface plate 34 to complete the heat insulation door. This constitution simplifies an assembly process and performs automatic assembly.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat-insulating door for a refrigerator or the like, which is constituted by a door plate of an injection-molded article.

[0002]

2. Description of the Related Art In recent years, a door gasket for a refrigerator or the like has a wedge-shaped mounting portion which is inserted into a gasket mounting locking groove provided in a door body in order to improve assemblability and serviceability. Gaskets have become the mainstream, and the structure is, for example, as shown in FIGS.
There is one disclosed in 195,888.

In FIG. 1, reference numeral 1 denotes a refrigerator main body, and a freezer compartment door 2 (hereinafter referred to as a door), a refrigerator compartment door 3, a partial compartment door 4, and a vegetable compartment door 5 are provided at the front opening. The door 4 has a door surface plate 8 in which the upper and lower sides 6 are bent to form a U-shaped portion 7. The door frame groove 9 inserted in the U-shaped part 7
And door back plate setting rib 10 and locking groove A1 for mounting gasket
A long gasket mounting sash 12 provided with 1;
A recess 17 into which the gasket mounting locking groove B14 inserted into the left end portion 13 of the door front plate 8, a door back plate installation rib B15, and a sash end 16 of the elongated gasket mounting sash; An injection-molded handle door 19 having a handle portion 18 is provided. Further, a gasket mounting locking groove B14 and a door back plate mounting rib B15 inserted into the right end portion 20 of the door surface plate 8 of the door surface plate 8 are provided, and the sash end 16 of the elongated gasket mounting sash 12 is provided. An injection molded cap door 21 having a recess 17 for insertion is provided.

The opposed handle doors 19 of the door frame 22 formed by the elongated gasket mounting sash 12 and the handle door 19 and the cap door 21.
Rail reinforcing plate 2 for fixing container rail 23 installed between door back plate installation rib B15 and cap door 21
4 is installed, and a door back plate 25 is provided on the door back plate installation rib 10 and the door back plate installation rib B15 of the door frame 22. Door front plate 8, door back plate 25, handle door 19, cap door 21, and long gasket mounting sash 12
A foam insulation material 26 injected and foamed therebetween is provided.

There is provided a gasket 29 having a wedge-shaped mounting portion 28 inserted into a gasket mounting locking groove frame 27 constituted by the gasket mounting locking groove A11 and the gasket mounting locking groove B14. 30 is a container,
The front end of the container rail 23 is fixed to the rail reinforcing plate 24 with a plurality of screws 31 via the door back plate 25 of the door 5. Reference numeral 31 denotes the gasket mounting locking groove B14.
Is a sealing tape for sealing the foamed heat insulating material 26, and the material is formed of a polyethylene foam or the like.

[0006]

However, in a door of a refrigerator or the like constructed as described above, the gasket mounting locking groove A into which the wedge-shaped mounting portion 28 of the gasket 29 is inserted.
A long gasket mounting sash 12 provided with 11,
Further, since the handle door 19 and the cap door 21 provided with the locking groove B14 for mounting the gasket are used as a structure as the door 4, the number of parts of the door configuration is large, and a costly door is provided. The assembling operation of the door 4 main body is performed by inserting a long gasket mounting sash 12 having a door frame groove 9 into the U-shaped portion 7 of the door front plate 8, and attaching the sash 12 to the handle door 19 and the cap door 21 respectively. The sash end 16 of the long gasket mounting sash 12 is inserted into the formed recess 17 to form the door 4, and the rail reinforcing plate 24 for fixing the container rail 23.
This is a complicated operation for installing the door 4 between the door back plate installation ribs B provided on each of the handle door 19 and the cap door 21, and has a problem that automatic assembly of the door 4 is difficult.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and has as its object to eliminate a long sash for mounting a gasket, simplify a door assembling operation, and facilitate automatic assembly.

[0008]

SUMMARY OF THE INVENTION In order to achieve this object, the present invention provides a gasket mounting locking portion integrally formed into a wedge shape on the outer periphery by vacuum forming, and a bow-shaped flange extending to the outer periphery. A door back plate having a piece formed thereon, a door front plate having a plurality of door back plate joining ribs having a plurality of cutouts facing the inner peripheral surface formed by injection molding, and a protruding door back plate; The outer periphery of the door back plate is inserted into the inner periphery of the door front plate so that the plate joining ribs are brought into contact with each other, and a foamed heat insulating material is injected and foamed between the door back plate and the door front plate to form the wedge as the door body. The wedge-shaped mounting portion of the gasket is inserted into the shaped gasket mounting locking portion to form a heat insulating door structure.

In order to further improve the urethane seal, the urethane is sealed with a bow-shaped flange piece of the door back plate by a door back plate sealing rib provided on the door front plate.

[0010] In order to further improve the heat insulating property, a bow-shaped flange piece of the door back plate is inserted into a door front plate having a plurality of door back plate insertion ribs projecting therefrom, and the door front plate and the door back are inserted. Insulation door is made by injecting and foaming a foam insulation material over the entire surface between the plates.

Further, since a rail mounting boss for mounting the container rail on the door surface body by using an injection-molded product is integrally protruded, it is possible to reduce the number of parts and to assemble the container.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The heat insulating door for a refrigerator or the like according to the first aspect of the present invention has a gasket mounting locking portion formed integrally with the door back plate in a wedge shape. Sash is gone. Also, a door back plate joining rib integrally having a plurality of notches abuts on the bow-shaped flange piece of the door back plate from the injection molded product formed into a container shape with a synthetic resin, and covers the outer periphery of the door back plate. To be inserted into the inner surface around the door
The entire surface outside the door back plate is fixed with a foaming jig, and it is possible to completely inject and foam between the door back plate and the door front plate. It has excellent effects such as simplicity and easy automatic assembly.

According to a second aspect of the present invention, a door back plate sealing rib facing a peripheral inner surface of an injection-molded article formed of a synthetic resin into a container shape is urethane-sealed with a bow-shaped flange piece of the door back plate. An object of the present invention is to provide an insulated door capable of simplifying an assembling operation of the insulated door body and facilitating automatic assembly.

According to a third aspect of the present invention, a plurality of door back plate insertion ribs are easily protruded from the door front plate by injection molding, and a bow-shaped flange piece engaged therewith is formed from the door back plate. Then, the door back plate and the door front plate are inserted, the entire surface outside the door back plate is pressed with a foam jig (not shown), and the foam is injected and foamed between the door back plate and the door front plate to complete the insulated door. There is an excellent effect that the number of points is small, the assembling work is simplified and automatic assembling is facilitated.

According to the fourth aspect of the present invention, since the rail mounting boss for mounting the container rail on the door surface by using an injection-molded product is integrally protruded, the reinforcing plate for the rail is eliminated, and the inside of the warehouse is removed. The reinforcing plate (iron plate) is not cooled by the cold air and does not condense on the gasket surface or the door door surface plate. Further, the assembling work is simplified and the automatic assembling is facilitated.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a heat insulating door structure used in a refrigerator or the like according to the present invention will be described below with reference to the drawings. The same components as those in the related art are denoted by the same reference numerals, and detailed description thereof will be omitted.

Embodiment 1 FIG. 1 is a perspective view of a refrigerator according to Embodiment 1 of the present invention. FIG. 2 is a heat insulating diagram of a main part of a door of a refrigerator or the like according to the embodiment. FIG. 3 is a perspective view of the door back plate of the embodiment. FIG. 4 is a sectional view of the door back plate of the embodiment. FIG. 5 is a perspective view of the door back plate of the embodiment. FIG.
FIG. 2 is a sectional view of a door of the refrigerator and the like according to the embodiment. FIG.
It is a foaming jig figure of the example.

In the drawing, reference numeral 31 denotes a gasket mounting locking portion 32 formed in a substantially flat plate shape by vacuum forming and formed in a wedge shape on the outer periphery thereof, and a bow-curved shape extending further outwardly. It is a door back plate formed with a flange piece 33. Numeral 34 denotes an injection-molded product formed in a container shape from a synthetic resin material, and is a door surface provided with a door back plate joining rib 37 having a plurality of notches 36 opposed to a peripheral inner surface 35. It is a board. 3
Reference numeral 8 denotes a sealing material such as soft urethane, which is fixed to the entire periphery between the door back plate joining rib 37 of the door front plate 34 and the peripheral inner surface 35. 39 is a seal member after urethane foaming. Numeral 26 denotes a foamed heat insulating material, which is injected and foamed between the door front plate 34 and the door back plate 31 to integrate the door front plate 34 and the door back plate 31 and at the same time, the wedge-shaped gasket mounting locking portion. An outer periphery 32 </ b> A of 32 is inserted and arranged between the entire periphery of the door back plate joining rib 37 and is formed in contact with the front end of the door back plate joining rib 37 and the bow-shaped flange piece 33.

Reference numeral 29 denotes a gasket having a wedge-shaped mounting portion 28, which is inserted into the gasket mounting locking portion 32. The assembling work of the door 4 configured as described above will be described below. First, a sealing material 38 is provided all around the door back plate joining rib 37 of the door front plate 34 and the peripheral inner surface 35.
To form a door faceplate assembly 40 (not shown).
Next, between the reference numeral 41 of the wedge-shaped gasket mounting locking portion outer periphery 32A of the door back plate 31 and the arc-shaped flange piece 33 are between the reference numeral 42 of the door back plate joining rib 37 of the door front plate assembly 40. The door back plate 31 is inserted and set so as to abut on the front end of the door back plate joining rib 37, installed on the foam jig body 43, and the foam jig lid 4 is set.
4 is fixed. Finally, the foam insulation material 26 from the door back plate hole 45
When the foam is injected and foamed, the foam material is transferred to the door back plate 31 and the door front plate 34.
During this time, the foam material is filled between the door back plate joining rib 37 and the peripheral inner surface 35 through the notch 36 provided in the door back plate joining rib 37 formed on the door front plate, and the heat insulating door is completed. The sealing method of the foamed heat insulating material 26 is performed by the seal member 39 and the seal material 38.

The heat-insulating door structure having the above-described structure has a door back plate integrally formed with the gasket mounting locking portion 32, a door front plate 34 integrally formed by injection molding, and a sealing material 38.
Therefore, the gasket mounting sash 12 is unnecessary, there is no urethane leakage, and the assembling work of the door 4 body is simplified, and the automatic assembling is facilitated.

(Embodiment 2) FIG. 1 has the same configuration as that of Embodiment 1, and FIG. 8 is a sectional view of a main part of a door according to Embodiment 2 of the present invention. FIG. 9 is a perspective view of the door surface plate of the embodiment.

8 and 9, there is shown a door front plate 34 provided with a door back plate sealing rib 46 protrudingly provided to face a peripheral inner surface 35 of an injection-molded product formed into a container shape by a synthetic resin. . Reference numeral 31 denotes a door back plate described in the above embodiment. 39 is a seal member after urethane foaming. Numeral 26 denotes a foamed heat insulating material, which is injected and foamed between the door front plate 34 and the door back plate 31 to be integrated with the door front plate 34 and the door back plate 31, and at the same time, a wedge-shaped gasket mounting locking portion 32. The outer circumference 32A of
The door back plate sealing ribs 46 are inserted and arranged around the entire circumference, and the tip of the door back plate sealing ribs 46 and the bow-shaped flange piece 33
Formed.

Hereinafter, the assembling work will be described. The door back plate 31 integrally formed with the wedge-shaped gasket mounting locking portion 32 is inserted between the reference numerals 42 of the door back plate sealing ribs 46 integrally formed from the door front plate 34 and the bow of the door back plate 31 at the same time. After the door back plate 31 is inserted and set so that the curved flange piece 33 is joined to the front end 46A of the door back plate sealing rib 46, the foam jig body (not shown) or the foam jig lid (not shown) ), The outer surface of the door plate 34 and the door back plate 31 respectively.
Press and fix the outer surface of. Thereafter, when the foamed heat insulating material 26 is injected and foamed from the door back plate hole 45, the foamed material is injected and foamed all around the door back plate sealing ribs 46 of the door back plate 31 and the door front plate 34. However, the door back plate sealing rib 46 tip 46
A and the bow-shaped flange piece 33 are joined without any gap, so that the hollow portion 47 between the door back plate sealing rib 46 and the peripheral inner surface 35 is hardly filled with the foamed heat insulating material 26 and slightly filled. It is about urethane injection.

The heat-insulating door structure having the above-described structure is similar to the seal member 38 for preventing urethane leakage described in the first embodiment.
Is unnecessary, and the assembling operation of the heat insulating door body is simplified, so that the automatic assembling is facilitated.

(Embodiment 3) FIG. 1 has the same configuration as that of Embodiment 1, and FIG. 10 is a sectional view of a main part of a door according to Embodiment 3 of the present invention. FIG. 11 is a sectional view of the door back plate of the embodiment. FIG. 12 is a perspective view of the door surface plate of the embodiment. FIG. 13 is a sectional view of a door of the refrigerator and the like according to the embodiment.

In FIGS. 10 to 13, a door front plate 34 provided with a plurality of door back plate insertion ribs 48 protrudingly provided facing the inner peripheral surface 35 of an injection molded product formed of a synthetic resin into a container shape. is there. Reference numeral 31 denotes the door back plate described in the first embodiment. 38 is a sealing material such as soft urethane.
Door back plate insertion rib 48 and peripheral inner surface 35 of the door front plate 34
It is fixed around the entire circumference. 39 is a seal member after urethane foaming. 26 is a foam insulation material,
At the same time as the door back plate 31 is integrated, the outer periphery 32A of the wedge-shaped gasket mounting locking portion 32 is inserted and arranged between the entire circumference of the door back plate insertion rib 48 and the front end of the door back plate insertion rib 48. In contact with the bow-shaped flange piece 33.

Further, reference numeral 50 denotes the outer peripheral end surface 49 of the door back plate 31.
The dimensional relationship between the reference numeral 51 of the peripheral inner surface 35 of the door front plate 34 and the reference numeral 51 is such that the reference numeral 50 is greater than the reference numeral 51. The outer peripheral end surface shape of the door back plate 31 formed of a vacuum molded product is a shape cut by an R-bend portion 52 extending outward from the bow-shaped flange piece 33 as shown in FIG. Has become. Reference numeral 29 denotes a gasket having a wedge-shaped mounting portion 28, which is inserted into the gasket mounting locking portion 32. The assembling work of the door 4 configured as described above will be described below. First, a sealing material 38 is fixed to the entire periphery between the door back plate insertion rib 48 and the peripheral inner surface 35 of the door front plate 34 to form a door front plate assembly 40 (not shown).

Next, between the reference numeral 41 of the wedge-shaped gasket mounting locking portion outer periphery 32A of the door back plate 31, the reference numeral 42 of the door back plate insertion rib 48, and the outer peripheral end surface 49 of the door back plate 31.
Between the reference numeral 50 is the reference numeral 51 of the peripheral inner surface 35 of the door surface plate 34.
The door back plate 31 is inserted and set so as to be joined and sealed between the door jig body 43 (not shown) and the foam jig lid 44 (not shown). 31 Fix the outer surface. Finally, the foam heat insulating material 26 is injected and foamed from the door back plate hole 45 to integrally foam the door front plate 34 and the door back plate 31 to complete the heat insulating door. The sealing method of the foam heat insulating material 26 is performed by the seal member 39 and the seal material 38.

The heat-insulating door structure having the above structure does not require the sash 12 for attaching the gasket, and furthermore, the door back plate 31
Since the dimension between the outer peripheral end surface 49 and the inner peripheral surface 35 of the door surface plate 34 is larger than the reference numeral 50> the reference numeral 51, the urethane seal can be reliably performed, so that the sealing material 38 is required but can be eliminated. The number of points is small, the assembling work is simplified, and the automated assembling is easy.

(Embodiment 4) FIG. 1 has the same structure as Embodiment 1, and FIG. 14 is a sectional view taken along the line AA of FIG. 1 according to Embodiment 4 of the present invention. FIG. 15 is a rear view of the door face plate of the embodiment.

14 and 15, a door surface plate 34 in which a plurality of container rail mounting bosses 53 are provided on the inner surface of an injection-molded article formed of a synthetic resin in the shape of a container so as to project right and left outward. The container rail 23 supporting the container and the front end 23A of the container rail are fixed to the container rail 23 with a plurality of screws 54 via the door back plate 31 of the door body 4.
Reference numeral 30 denotes a container. 26 is a foam heat insulating material injected and foamed between the door back plate 31 and the door back plate.

In the heat insulating door structure having the above configuration,
A rail reinforcing plate (made of iron) for fixing the container rail 23 in the foamed heat insulating material 26 becomes unnecessary, and the rail reinforcing plate is cooled by cold air in the refrigerator, and there is no dew condensation on the gasket surface or the door door surface due to heat conduction. Also, the assembling work is simplified and automatic assembling is facilitated.

[0033]

As described above, in the heat-insulating door structure of a refrigerator or the like according to the present invention, the gasket mounting locking portion formed integrally with the gasket from the door back plate is formed. Gasket mounting sash can be eliminated. Also, the outer peripheral bow of the door back plate abuts on the entire circumference of the joining rib protruding outward from the door front plate, and the entire surface outside the door back plate is pressed with a foaming jig. Insulation doors are constructed by injecting and foaming foam insulation between them, and the number of parts is small, there is no complicated installation work with the mating parts, the assembly work without urethane leakage is simplified, and automatic assembly is easy. The door structure is suitable for mass production.

Further, a bow-shaped flange piece formed on the outer periphery of the door back plate and a door back plate sealing rib provided on the entire periphery without a plurality of notches integrally formed from the door front plate. Because the foam jig securely holds the door back plate flange piece and seals the urethane with the flange piece and seal rib, there is no need for a soft sealing material such as urethane for sealing, which simplifies assembly work and facilitates automatic assembly. Insulated doors can be provided.

Further, a plurality of door back plate insertion ribs are integrally formed on the outer surface of the door back plate so as to protrude from the door back plate, and the door back plate is provided on the door back of the door front plate. Joining and inserting into the board insertion rib, holding the door back plate with a foaming jig and fixing it, and completely injecting and foaming foam insulating material between the door back plate and the door front plate, high insulation performance, simplifies assembly work, automatic assembly This has the effect that it becomes easier.

In addition, since a rail reinforcing plate (made of iron) for mounting the container rail is eliminated, a rail mounting boss is easily formed integrally with the door front plate, and the container rail is fixed with screws, so reinforcement is provided by cold air. The plate is not cooled and dew condensation does not occur on the outer surface of the door, and the elimination of the reinforcing plate simplifies the assembly work and facilitates the automatic assembly.

[Brief description of the drawings]

FIG. 1 is a perspective view of a refrigerator according to a first embodiment of the present invention.

FIG. 2 is a sectional view of a main part of a door of the refrigerator or the like according to the embodiment.

FIG. 3 is a perspective view of a door back plate of the embodiment.

FIG. 4 is a sectional view of the door back plate of the embodiment.

FIG. 5 is a perspective view of a door surface plate of the embodiment.

FIG. 6 is a sectional view of a door of the refrigerator or the like according to the embodiment.

FIG. 7 is a diagram showing a foaming jig of the embodiment.

FIG. 8 is a sectional view of a main part of a door according to a second embodiment of the present invention.

FIG. 9 is a perspective view of a door surface plate of the embodiment.

FIG. 10 is a sectional view of a main part of a door according to a third embodiment of the present invention.

FIG. 11 is a sectional view of the door back plate of the embodiment.

FIG. 12 is a perspective view of a door surface plate of the embodiment.

FIG. 13 is a sectional view of a door of a refrigerator or the like according to the embodiment.

FIG. 14 is a sectional view taken along line AA of FIG. 1 according to a fourth embodiment of the present invention.

FIG. 15 is a back view of the door front plate of the embodiment.

FIG. 16 is a perspective view of a conventional refrigerator.

17 is a cross-sectional view taken along line BB of FIG. 16 of the related art.

18 is a sectional view taken along line CC of FIG.

19 is a sectional view taken along line DD of FIG.

FIG. 20 is a perspective view of a conventional long gasket mounting sash.

FIG. 21 is a rear view of a door showing a long gasket mounting sash inserted into a concave portion of a conventional cap door.

FIG. 22 is a sectional view taken along line EE of FIG. 21;

FIG. 23 is a sectional view taken along line FF of FIG. 22;

24 is a sectional view taken along line GG of FIG.

[Explanation of symbols]

 23 Rail for Container 26 Foam Insulation Material 28 Wedge-shaped Mounting Part 29 Gasket 30 Container 31 Door Back Plate 32 Gasket Mounting Locking Part 33 Bow-Flanged Flange Piece 34 Door Front Plate 35 Peripheral Inner Surface 37 Door Back Plate Joining Rib 46 Door Back plate sealing rib 48 Door back plate insertion rib 53 Container rail mounting boss 54 Multiple screws

Claims (4)

[Claims] 1. A gasket mounting locking portion formed in a substantially flat plate shape by vacuum molding of a synthetic resin and formed in a wedge shape on an outer periphery thereof, and a bow-shaped flange piece is formed on an outer periphery thereof. A door back plate, a door front plate provided with a door back plate joining rib having a plurality of notches facing a peripheral inner surface of an injection-molded article formed of a synthetic resin in a container shape, and a peripheral surface thereof, and the bow The outer periphery of the door back plate is the door top plate so that the curved flange piece abuts the door back plate joining rib, and the wedge-shaped gasket mounting locking portion is arranged all around the door back plate joining rib. A wedge-shaped mounting portion provided on the gasket at the wedge-shaped gasket mounting locking portion, which is inserted into a peripheral inner surface to inject and foam a foam insulation material between the door back plate and the door front plate; Insulated doors for refrigerators, etc. 2. A bow curve provided on an outer periphery of a door back plate on a door front plate on which a door back plate sealing rib opposed to an inner peripheral surface of an injection-molded product formed of a synthetic resin into a container shape is protruded all around. 2. A urethane seal formed by a flange-shaped piece.
Insulated doors such as the refrigerator described. 3. A bow curve provided on an outer periphery of a door back plate on a door front plate on which a plurality of door back plate insertion ribs protruding from a peripheral inner surface of an injection-molded article formed of a synthetic resin in a container shape are projected. 2. A heat insulating door for a refrigerator or the like according to claim 1, wherein the door back plate is inserted into the door front plate provided between the inner peripheral surface of the door front plate and the door back plate insertion rib. 4. A door front plate having a plurality of container rail mounting bosses protruding outward on the inner surface of an injection-molded article formed of a synthetic resin into a container shape, and a container support container. The heat insulating door of a refrigerator or the like according to claim 1, wherein a rail and a front end of the container rail are fixed with a plurality of screws via a door back plate of a door body.