JP3871500B2 - Refrigerator door - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a refrigerator door.
[0002]
[Prior art]
Conventionally, in the refrigerator door that opens and closes the front opening of the refrigerator main body, in order to reduce heat leakage from the door periphery, a convex portion protruding backward is provided on the door inner plate, and this convex portion and the refrigerator A throat portion is formed between the main body. In order to further reduce heat leakage, a fin-like sealing material that seals the throat portion may be attached to the door inner plate.
[0003]
FIG. 10 is an enlarged cross-sectional view of a main part of a conventional refrigerator door 100. In the refrigerator door 100, the door inner plate 101 is formed by vacuum forming, and a gasket 102 is attached to the peripheral portion thereof, and a throat portion is provided between the inner periphery of the gasket 102 and the inner box 104 of the refrigerator main body 103. A convex portion 106 forming 105 is provided. The convex portion 106 is provided with an attachment projection 108 for attaching a fin-like sealing material 107 for sealing the throat portion 105, and the sealing material 107 is attached so as to cover the attachment projection 108. .
[0004]
In this refrigerator door 100, since the door inner plate 101 is formed by vacuum forming and cannot be provided with fine unevenness, the width of the mounting protrusion 108 is large, and accordingly, the mounting base of the sealing material 107 becomes large. There is.
[0005]
FIG. 11 is an enlarged cross-sectional view of a main part of another conventional refrigerator door 110. In this refrigerator door 110, the door inner plate 101 is formed by injection molding, and an attachment protrusion 111 for attaching the sealing material 107 is provided so as to protrude from the rear surface of the convex portion 106, that is, from the front end surface to the inside of the warehouse. Yes. In this case, since the mounting protrusion 111 for mounting the sealing material 107 has a thin plate shape as compared with the example shown in FIG. 10, the problem that the mounting base of the sealing material 107 becomes large is solved.
[0006]
[Problems to be solved by the invention]
However, since the mounting protrusion 111 protrudes independently from the front end surface of the convex portion 106 of the door inner plate 101, it prevents the meandering deformation at the time of manufacturing the door, particularly at the time of foaming of hard urethane which is the heat insulating material 112. Therefore, it is necessary to increase the rigidity of the mounting protrusion 111 to some extent. In addition, since the mounting protrusion 111 alone supports the sealing material 107, the mounting protrusion 111 is required to have a certain degree of rigidity. Therefore, in such a conventional structure, the mounting protrusion 111 cannot be made sufficiently thin. difficult.
[0007]
Further, since the mounting protrusion 111 protrudes from the convex portion 106, it is easily deformed / damaged in the manufacturing process, and the yield deteriorates. In addition, when the mounting protrusion 111 is deformed such as meandering, the mounting workability of the sealing material 107 is deteriorated, and the position variation occurs at the tip of the sealing material 107 and the sealing performance of the throat portion 105 is deteriorated. is there. Further, in the door manufacturing process, the doors are generally stacked, but at that time, the mounting protrusion 111 may hit the door front plate 113 to generate a dent.
[0008]
The present invention has been made in view of the above points, and as a mounting portion of the sealing material to be attached to the door inner plate in order to seal the throat portion, it is thin and hardly deformed, and the mounting performance of the sealing material It aims at providing the refrigerator door which is excellent in the sealing performance of a throat part.
[0009]
[Means for Solving the Problems]
The refrigerator door which concerns on Claim 1 of this invention is filled with a heat insulating material between the door front board and the door inner board which consists of an injection molding body of a synthetic resin, and can open and close the front opening part of a refrigerator main body. In the door, a convex portion that forms a throat portion between the door inner plate and the refrigerator main body opening is provided, and mounting protrusions are integrally provided along the side surface of the convex portion by the injection molding. A fin-shaped sealing material that seals the throat portion is provided in a groove formed between the mounting protrusion and the convex portion, and the sealing material is held so as to sandwich the mounting protrusion. And a fin portion protruding rearward from the attachment base is formed in a curved shape toward the outer side opposite to the groove, and the fin portion is located outside the mounting protrusion. provided so as to abut against the refrigerator body, said attachment protrusion By providing a plurality of locking projections for locking the sealing material in the longitudinal direction of the mounting projection on the side opposite to the inside of the groove, the mounting projection is sandwiched by the mounting base. A sealing material is attached to the door inner plate.
[0010]
In the refrigerator door of the present invention, the mounting protrusion to which the sealing material for sealing the throat portion is attached is provided along the side surface of the convex portion of the door inner plate, and the mounting protrusion and the side surface of the convex portion are provided. Since the sealing material is attached to the groove between the two, the rigidity of the mounting protrusion can be reduced, that is, made thinner than the conventional structure in which the sealing material is supported by the mounting protrusion alone. Further, the deformation of the mounting protrusion in the manufacturing process is suppressed, and the mounting workability of the sealing material is excellent, and the position variation of the tip portion of the sealing material is reduced, and the sealing performance of the throat portion is excellent.
[0011]
In the refrigerator door of this invention, it is preferable that the front-end | tip of the said mounting protrusion is formed on the same plane or lower than the front-end | tip surface of the said convex-shaped part.
[0012]
In this case, since the mounting protrusion has a shape that does not protrude from the front end surface of the convex portion of the door inner plate, deformation / breakage of the mounting protrusion in the manufacturing process is further reduced. Further, when the doors are stacked in the manufacturing process, it is easy to stack the doors, and it is possible to prevent the dent of the door front plate from being caused by the mounting protrusion.
[0014]
Refrigerator door according to claim 3 of the present invention is made by forming a heat-insulating material and rigid urethane foam filling to between door inner plate made of injection-molded body of the door front panel synthetic resin, the front face of the refrigerator body In the refrigerator door capable of opening and closing the opening, the inner wall of the door is provided with a convex portion that forms a throat portion with the refrigerator main body opening, and an attachment protrusion is provided along the side of the convex portion. A fin-shaped sealing material that seals the throat portion is installed in a groove formed between the mounting projection piece and the convex portion, and the sealing material is locked to a side surface of the mounting projection piece. A stop convex portion is provided, and the hard urethane gas vent hole penetrating the door inner plate is provided in front of the locking convex portion .
[0015]
In this case, the door inner plate is formed by combining the first mold that forms the rear side of the door inner plate and the second mold that forms the front side, and injecting a synthetic resin between the two molds. The locking projection provided on the side surface of the mounting protrusion is formed by the first mold. However, if it is attempted to form only by the first mold, an undercut is formed. Therefore, a through hole is provided in front of the locking projection. A part of the mold 2 is penetrated rearward, thereby forming the front surface of the locking projection so as not to be undercut. And the said through-hole is utilized as a degassing hole of the hard urethane at the time of integral foaming of a door. Thus, by providing a through hole in front of the locking projection, avoiding undercutting, and using this through hole as a hard urethane gas vent hole, a separate gas vent hole is provided. There is no need to provide it.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the refrigerator door which concerns on embodiment of this invention is demonstrated based on drawing.
[0017]
1 and 2 are enlarged cross-sectional views of the main part of the refrigerator door 10 according to the first embodiment, FIG. 3 is a front view of the refrigerator 1, and FIG. 1 is a cross-sectional view taken along line AA in FIG. 2 is a cross-sectional view taken along the line BB in FIG.
[0018]
As shown in FIG. 3, the refrigerator 1 is a refrigerator-freezer provided with the refrigerator compartment 2, the vegetable compartment 3, the 1st freezer compartment 4, the ice making room 5, and the 2nd freezer compartment 6 from the top, The front opening part of each room | chamber Is configured to be openable and closable by a rectangular door. Below, although the door 10 which obstruct | occludes the front opening part of the vegetable compartment 3 is demonstrated, the same structure can be applied also to another door. The present invention is particularly preferably applied to a drawer-type door that has a storage container behind it and pulls out the storage container as the door opens.
[0019]
As shown in FIG. 4, the door 10 includes a door front plate 12 made of a printed steel plate that forms the front of the door, a door inner plate 14 made of a synthetic resin injection-molded body that forms the inner surface of the door, and a synthetic resin. The upper and lower door caps 16 and 18 are provided. The door front plate 12 is formed so that the left and right sides are bent rearward in a U-shaped cross section. The upper and lower door caps 16 and 18 are respectively inserted into the upper and lower sides of the door front plate 12 and the door inner plate 14 is covered from behind. Thus, the door 10 in which the heat insulating layer 20 is laminated and integrated between the door front plate 12 and the door inner plate 14 by injecting a foam material of hard urethane into the foaming space formed by these and performing foam molding. It is formed.
[0020]
On the peripheral edge of the door inner plate 14, a gasket groove 24 is provided over the entire periphery, in which a gasket 22 that contacts the opening peripheral edge of the refrigerator body 7 and seals between the two is fitted. On the inner peripheral side of the gasket groove 24, a convex portion 28 that protrudes rearward and forms a throat portion 26 with the refrigerator main body 7 is provided. In this embodiment, the convex portion 28 is formed so that substantially the entire door inner plate 14 protrudes rearward, but it can also be provided circumferentially along the gasket groove 24.
[0021]
A thin plate-like mounting protrusion 30 is provided along the outer peripheral side surface of the convex portion 28. The mounting protrusion 30 is erected rearward from a position close to the side surface of the convex portion 28 so as to form a narrow groove with the side surface of the convex portion 28, and extends along the side surface. Yes. A fin-like sealing material 32 for sealing the throat portion 26 is attached to a groove formed between the attachment protrusion 30 and the convex portion 28.
[0022]
In this embodiment, the mounting protrusions 30 are provided on the left and right sides and the lower side of the door inner plate 14 and are not provided on the upper side. Therefore, the sealing material 32 is also attached only to the left and right sides and the lower side of the door 10. This is because, on the upper side of the door 10, a sealing material (not shown) is attached to the lower surface of the partition body that partitions the vegetable compartment 3 and the refrigerator compartment 2, and the sealing material abuts on the upper side of the door 10 and throats. This is because the part is sealed. However, in the present invention, the sealing material 32 may be attached to the entire periphery of the door 10.
[0023]
As shown in FIG. 1, on the left and right sides of the door 10, the mounting protrusions 30 of the sealing material 32 are provided at the center in the width direction of the step portion 28 a provided at the outer peripheral edge of the convex portion 28. Yes. The protruding height of the mounting protrusion 30 is set lower than the front end surface of the convex portion 28 so that the front end thereof is positioned in front of the front end surface of the convex portion 28.
[0024]
The sealing material 32 includes an attachment base portion 32a that holds the attachment projection piece 30 so as to sandwich the attachment projection piece 30, and is attached to the door inner plate 14 by sandwiching the attachment projection piece 30 with the attachment base portion 32a. The attached sealing material 32 contacts or approaches the wall surface of the vegetable compartment 3, that is, the inner box 7a of the refrigerator main body 7, and seals the throat portion 26. The sealing material 32 is made of a soft and integral integral molded body, the mounting base portion 32a is made of a hard material, and the fin portion that seals the throat portion 26 is made of a soft material. In FIG. 1, reference numeral 7 b indicates an outer box constituting the refrigerator main body 7, and reference numeral 7 c indicates a hard urethane heat insulating layer that is foam-filled between the inner box 7 a and the outer box 7 b.
[0025]
As shown in FIG. 2, in the lower side portion of the door 10, the mounting protrusion 30 of the sealing material 32 protrudes rearward from the outer end of the step portion 28 a provided on the outer peripheral edge portion of the convex portion 28. Is formed. The protruding height of the mounting protrusion 30 is set so that the tip thereof is lower than the tip surface of the convex portion 28 as in the case of the left and right sides. Further, the seal material 32 is also attached to the door inner plate 14 by sandwiching the attachment protrusion 30 with the attachment base 32a. The attached sealing material 32 comes into contact with or approaches the upper surface of the partition body 8 installed in the left-right direction of the refrigerator body 7 so as to partition the vegetable room 3 from the first freezing room 4 and the ice making room 5. The throat portion 26 is sealed. In FIG. 2, reference numeral 8 a indicates a dewproof pipe, and reference numeral 8 b indicates a heat insulating material disposed in the partition body 8.
[0026]
As shown in FIG. 5, a locking projection 34 that locks the sealing material 32 is provided on the side surface of the mounting protrusion 30. A plurality of the locking projections 34 are provided in the longitudinal direction of the mounting protrusion 30, for example, three on each side, and latch the locking protrusions 36 provided at the lower end of the mounting base 32 a of the sealing material 32. Thus, the sealing material 32 is prevented from easily coming off. In this embodiment, the locking projection 34 is provided on the outer wall surface of the mounting projection 30, that is, on the side surface opposite to the inside of the groove formed between the mounting projection 30 and the projection 28. It has been.
[0027]
The locking projection 34 is provided on the side surface of the mounting protrusion 30 by so-called upper and lower cut-off molding. Specifically, as shown in FIG. 6, the door inner plate 14 is formed between an upper mold 40 that forms the rear surface side (door rear surface) and a lower mold 42 that forms the front surface side (heat insulation layer 20 side). Molded by injecting synthetic resin. The upper mold 40 is provided with a groove 44 for forming the mounting protrusion 30, and a recess is formed in the groove 44 to form the locking projection 34. When the portion 34 is formed, the upper die 40 is undercut. Therefore, in order to prevent the upper die 40 from being undercut, the projection 46 of the lower die 42 is passed through to the rear side (upper side of the upper die 40), and inside the door in front of the locking projection 34 (downward in FIG. 6). A through hole 38 penetrating the plate 14 is provided, thereby forming the front surface (lower surface in FIG. 6) of the locking projection 34.
[0028]
In addition, the size of the locking projection 34 formed by such biting is set as small as possible, and the through hole 38 provided in front of the locking projection 34 is used as a gas vent hole when the heat insulating layer 20 is foamed with urethane. We are using. In addition, by forming the through hole 38 as fine as a gas vent hole, a urethane seal is not required when the heat insulating layer 20 is foamed with urethane.
[0029]
In this way, the dimensions of the locking projection 34 suitable for using the through hole 38 as an unnecessary gas vent hole of the urethane seal are as follows: the width w is 2 mm or less, the depth (projection dimension) d is 0.5 mm or less, and the height is high. The length h is 3 mm or less (see FIG. 7).
[0030]
In the refrigerator door 10 of the first embodiment described above, since the throat portion 26 is sealed by the sealing material 32 attached to the door inner plate 14, heat leak in the cabinet can be reduced, and energy saving is achieved. , Preventing condensation and improving cooling performance.
[0031]
Further, the mounting protrusion 30 of the sealing material 32 is provided along the side surface of the convex portion 28, and the sealing material 32 is mounted in the groove between the mounting protrusion 30 and the side surface of the convex portion 28. The mounting protrusion 30 can be made thinner than the conventional structure in which the sealing material is supported only by the mounting protrusion, and the appearance is good. In addition, while being thin, deformation of the mounting protrusion 30 at the time of manufacturing process, particularly urethane foaming is suppressed, and the mounting workability of the sealing material 32 is excellent, and the position variation of the tip portion of the sealing material 32 is reduced. Excellent sealing performance of the throat portion 26.
[0032]
In particular, since the mounting protrusion 30 has a shape that does not protrude with respect to the convex portion 28, deformation / breakage of the mounting protrusion 30 in the manufacturing process is further reduced, and stacking is also possible when stacking doors. It is easy to prevent the mounting protrusion 30 from causing scratches such as dents and scratches on the door front plate 12.
[0033]
Further, by providing the latching convex portion 34 for latching the sealing material 32 by cut-off molding, the upper mold 40 is prevented from being undercut, and the through hole 38 in front of the latching convex portion 34 is also provided. It is no longer necessary to provide a urethane gas vent hole as a hard urethane gas vent hole. Further, since an expensive mold configuration such as a slide mold is not required to form the locking projection 34, the cost is low.
[0034]
FIG. 8A is an enlarged cross-sectional view of the attachment portion of the sealing material 32 in the refrigerator door according to the second embodiment of the present invention, and FIG. 8B is the same as that at the time of injection molding of the door inner plate 14. It is an expanded sectional view of an attaching part.
[0035]
In the second embodiment, there is no step portion 28 a on the outer periphery of the convex portion 28 of the door inner plate 14, and the mounting protrusion 30 is provided directly between the gasket groove 24 on the outer periphery of the convex portion 28. . In this embodiment, the locking projection 34 of the mounting protrusion 30 that locks the sealing material 32 is formed on the inner wall surface of the mounting protrusion 30, that is, between the mounting protrusion 30 and the protruding portion 28. It is provided on the side surface in the groove. Therefore, a through hole 38 in front of the mounting protrusion 30 is provided in the groove. Other configurations are the same as those in the first embodiment.
[0036]
In the second embodiment, in addition to the effects of the first embodiment, a through hole 38 in front of the mounting protrusion 30 serving as a gas vent hole is provided in the groove between the mounting protrusion 30 and the convex portion 28. Therefore, even if a small amount of hard urethane leaks from the through hole 38 during foaming of the urethane, the urethane is not exposed to the outside by the sealing material 32 fitted in the groove, and the appearance is good.
[0037]
FIG. 9 is an enlarged cross-sectional view of the attachment portion of the sealing material 32 in the refrigerator door 50 according to the reference example . This reference example is different from the first embodiment in the configuration of the mounting base portion 32a of the sealing material 32. That is, in the reference example , the attachment base 32 a of the sealing material 32 is merely inserted into the groove between the attachment protrusion 30 and the convex portion 28, and does not sandwich the attachment protrusion 30. In this case as well, the locking projection 34 can be provided on the mounting protrusion 30 in the same manner as described above.
[0038]
【The invention's effect】
In the refrigerator door of the present invention, the sealing material for sealing the throat portion is attached between the mounting protrusion provided along the side surface of the convex portion of the door inner plate and the side surface of the convex portion. Therefore, the mounting protrusion can be made thinner than the conventional structure in which the sealing material is supported by the mounting protrusion alone. In addition, the deformation of the mounting protrusions in the door manufacturing configuration is suppressed, and the mounting workability of the sealing material is excellent, and the position variation of the front end portion of the sealing material is reduced, and the sealing performance of the throat portion is excellent.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a main part of a refrigerator door according to a first embodiment of the present invention, showing a cross section taken along line AA in FIG.
FIG. 2 is a cross-sectional view of the main part of the refrigerator door, showing a cross section taken along line BB of FIG.
FIG. 3 is a front view of the refrigerator.
FIG. 4 is an exploded perspective view of the refrigerator door.
FIG. 5 is an enlarged cross-sectional view of a door inner plate of the refrigerator door.
FIG. 6 is an enlarged cross-sectional view of the door inner plate during injection molding.
FIG. 7 is an enlarged perspective view of the door inner plate.
FIG. 8A is an enlarged sectional view of a door inner plate in the second embodiment, and FIG. 8B is an enlarged sectional view at the time of injection molding.
FIG. 9 is an enlarged cross-sectional view of a refrigerator door according to a reference example .
FIG. 10 is an enlarged cross-sectional view of a conventional refrigerator door.
FIG. 11 is an enlarged cross-sectional view of another conventional refrigerator door.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 ... Refrigerator door 12 ... Door front board 14 ... Door inner board 20 ... Thermal insulation layer 26 ... Throat part 28 ... Convex part 30 ... Mounting protrusion 32 ... Sealing material 32a ... Mounting base 34 ...... Locking projection 38 …… Through hole (gas vent hole)

Claims (3)

In the refrigerator door that is filled with a heat insulating material between the door front plate and the door inner plate made of the synthetic resin injection molded body, and can open and close the front opening of the refrigerator body,
The door inner plate is provided with a convex portion that forms a throat portion with the refrigerator main body opening, and the mounting projection piece is integrally provided by the injection molding along the side surface of the convex portion,
A fin-like sealing material that seals the throat portion is provided in a groove formed between the mounting projection piece and the convex portion, and the sealing material is held so as to sandwich the attachment projection piece. A fin portion provided with an attachment base, and a fin portion protruding rearward from the attachment base is formed in a curved shape toward the outer side opposite to the groove, and the fin portion is outside the attachment projection piece and is provided in the refrigerator. Provided to contact the body,
A plurality of locking projections for locking the seal material are provided in the longitudinal direction of the mounting protrusion on the side surface of the mounting protrusion opposite to the inside of the groove, and the mounting protrusion is attached to the mounting base. The refrigerator door, wherein the sealing material is attached to the door inner plate by sandwiching. The refrigerator door according to claim 1, wherein a tip of the mounting protrusion is formed on the same plane or lower than a tip surface of the convex portion. In the refrigerator door that is formed by filling and foaming hard urethane between the door front plate and the door inner plate made of synthetic resin injection molded body to form a heat insulating material, and opening and closing the front opening of the refrigerator main body,
The door inner plate is provided with a convex portion that forms a throat portion between the refrigerator main body opening and a mounting protrusion is provided along the side surface of the convex portion.
In the groove formed between the mounting protrusion and the convex portion, a fin-like sealing material for sealing the throat portion is attached,
On the side surface of the mounting protrusion, a locking projection for locking the sealing material is provided,
The refrigerator door, wherein a vent hole for the hard urethane that penetrates through the door inner plate is provided in front of the locking projection.

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