JP6089213B2 - refrigerator - Google Patents

Description

  The present invention relates to a refrigerator, and particularly to a refrigerator door configuration.

  In general, this type of refrigerator is provided with a refrigerator compartment, a freezer compartment, a vegetable compartment, etc. in a refrigerator body having heat insulation properties, and each of these refrigerator compartments, freezer compartments, vegetable compartments, etc. can be opened and closed by a door.

  The door includes a front plate that is a front surface of the refrigerator body, an inner box frame that is an inner surface of a refrigerator compartment, a freezer compartment, a vegetable compartment, and the like, and a frame that integrally connects the front plate and the inner box frame. Urethane is filled and foamed between them, and it is configured to have heat insulating properties like the refrigerator body.

  In such a refrigerator, the front plate of the door greatly affects the appearance of the entire refrigerator, that is, the design, and the finish greatly affects the quality of the entire refrigerator.

  In view of this, there is a structure in which the front plate of the door is made of a glass plate in order to improve the design of the door (for example, see Patent Document 1).

  FIG. 11 shows the door proposed in the above-mentioned Patent Document 1, and its front plate 101 is composed of a colored glass plate 103 in which a colored layer 102 such as a pattern is formed by silk printing, and the colored glass plate 103 and the inner box A urethane 106 is filled and foamed between the frame 104 and the frame body 105.

Japanese Patent No. 3140110

  According to the above-described conventional configuration, since the transparent layer of the colored glass plate 103 is positioned in front of the colored layer 102, depth is added to the color of the color and the texture is increased, compared with a pre-painted plate made of metal or resin. There exists an advantage which the design property improves.

  However, since the conventional door is provided with the colored glass plate insertion portion 107 in the frame body 105 and the colored glass plate 103 is fitted in the colored glass plate insertion portion 107, the colored glass plate insertion portion 107 is provided with the colored glass plate 107. There is a problem in that the design property that is exposed around the front surface of 103 and is improved by using the colored glass plate 103 is impaired.

  In addition, very fine pride and dust are deposited on the boundary between the colored glass plate insertion portion 107 and the colored glass plate 103, and even if this fine dust or dust is to be wiped off. It cannot be wiped off completely and begins to appear linear along the edge. If the coloring of the colored glass plate 103 is white, it will be noticeable after a short period of use, and will become more noticeable as the use period becomes longer, which greatly impairs the aesthetics of the refrigerator.

  Therefore, in order to solve such a problem, the applicant abolished the colored glass insertion portion 107 of the frame body 105, made a prototype of the colored glass plate 103 bonded with foamed urethane, and its end portion exposed as it is. I tried a life acceleration test.

  As a result, when water or the like is splashed on the door end surface, the water enters inward from the contact surface between the colored glass plate 103 and the frame 105 on the door end surface, and the water causes the colored glass plate 103 and the urethane foam 106 to Adhesive strength of the foamed urethane 106 and the colored glass plate 103 is partially peeled off, and gradually spreads to the whole, that is, the adhesive strength between the colored glass plate 103 and the foamed urethane 106 is increased. It proved difficult to guarantee over a long period of time.

  In addition, the colored layer 102 formed by silk printing or the like on the colored glass plate 103 has a variation in adhesive strength with the colored glass plate 103, and the colored layer 102 is deteriorated when the adhesive state deteriorates due to thermal shrinkage or secular change of the urethane foam 106. It has also been found that may peel off the colored glass plate 103 together with the urethane foam 106.

  The present invention has been made in view of such points, and ensures high designability so that the adhesive strength of a transparent front plate such as a glass plate can be ensured over a long period of time. It is an object of the present invention to provide a refrigerator with a door that can solve the obstacles that occur in order to guarantee the adhesive strength of a plate and can maintain its good design as it is.

In order to achieve the above object, the present invention includes a refrigerator main body and a door having heat insulation properties, and the door includes an inner box frame positioned inside the refrigerator main body, and an inner box frame covering the inner box frame. Between the transparent front plate disposed on the edge frame, the colored resin film attached to the inner surface of the transparent front plate via an adhesive, the colored resin film on the inner surface of the transparent front plate, the inner box frame, and the edge frame The transparent front plate is made of foamed urethane that is filled and foamed in a space, and the colored resin film on the inner surface is adhered to the urethane foam and held, and the outer peripheral portion of the colored resin film on the transparent front plate is held in the inner box bonded by a double-sided tape to the edge frame of the frame, and in which the addition of oxidizing aid on the surface of the colored resin film for bonding the double-sided tape, wherein the urethane foam is foamed transparent front plate outer peripheral portion Certain degree a configuration in which higher than the foaming density of the central portion.

  As a result, the glass plate is first held in a form that adheres to the edge frame of the inner box frame via a double-sided tape in addition to bonding with urethane, and is held in a form where the adhesive force is applied. become. And even if water splashes on the door edge, this water is blocked from entering inward by the double-sided tape that bonds the transparent front plate and the edge of the inner box frame. And adhesion peeling between the transparent front plate and the transparent front plate can be reliably prevented. Therefore, the adhesive strength of the transparent front plate can be maintained and ensured over a long period of time, and high reliability can be ensured.

  In addition, since the transparent front plate has a colored layer in terms of design, it is possible to eliminate the transparent front plate insertion portion that covers the peripheral portion of the transparent front plate as well as a deep appearance. Therefore, the design appearance is not impaired as in the case where there is a transparent front plate insertion portion, and a clean appearance with a flat feeling on the entire surface can be obtained. In addition, dust, dust or the like does not adhere to the boundary between the transparent front plate insertion portion and the transparent front plate, and this does not stand out linearly. Therefore, the initial high designability can be maintained as it is over a long period of time.

  Furthermore, the double-sided tape provided to improve the adhesive strength has a relatively weak adhesive force to the resin film, and the double-sided tape may be peeled off from the resin film when the double-sided tape is peeled off as it is. However, since an oxidation assistant is added to the surface of the resin film to which the double-sided tape is bonded, the adhesion between the double-sided tape and the resin film becomes strong with hydrogen bonding, and the double-sided tape is peeled off. When the paper is peeled off, the double-sided tape itself can be prevented from peeling off from the resin film, and the productivity can be improved by eliminating the decrease in workability.

  ADVANTAGE OF THE INVENTION While this invention can adhere and hold a transparent front board over a long period of time, it can improve the designability, can maintain the high designability as it is, and can provide the refrigerator with a door with good productivity.

External appearance perspective view of the refrigerator in Embodiment 1 of this invention Cross section of the refrigerator Perspective view showing one of the doors of the refrigerator Exploded perspective view of the refrigerator door AA sectional view of FIG. BB sectional view of FIG. Explanatory drawing explaining the tape sticking state with respect to the edge frame of the refrigerator Expanded sectional view showing the door end of the refrigerator Schematic diagram explaining the laminated state from the glass plate to the urethane foam in the door of the refrigerator Sectional drawing which shows the door of the refrigerator in Embodiment 2 Sectional view of a door in a conventional refrigerator

1st invention is equipped with the refrigerator main body and door which have heat insulation, The said door is arrange | positioned in the edge frame of the inner box frame so that the inner box frame located inside a refrigerator main body and the said inner box frame may be covered The transparent front plate, the colored resin film attached to the inner surface of the transparent front plate via an adhesive, and the filled foam in the space between the colored resin film, the inner box frame and the edge frame of the inner surface of the transparent front plate The transparent front plate is made to adhere and hold the colored resin film on the inner surface of the urethane foam, and the outer peripheral portion of the colored resin film on the transparent front plate is an edge frame of the inner box frame. bonded by a double-sided tape, and the ones obtained by adding an oxidizing aid on the surface of the colored resin film for bonding the double-sided tape, originating foam density a central portion of the urethane foam is transparent front plate outer peripheral portion It is constituted that higher than the density.

  As a result, the glass plate is first held in a form that adheres to the edge frame of the inner box frame via a double-sided tape in addition to bonding with urethane, and is held in a form where the adhesive force is applied. become. And even if water splashes on the door edge, this water is blocked from entering inward by the double-sided tape that bonds the transparent front plate and the edge of the inner box frame. And adhesion peeling between the transparent front plate and the transparent front plate can be reliably prevented. Therefore, the adhesive strength of the transparent front plate can be maintained and ensured over a long period of time, and high reliability can be ensured.

  Further, since the transparent front plate has a colored layer in terms of design, it can have a deep appearance and the design properties are improved. Furthermore, since the transparent front plate insertion part that covers the peripheral edge of the transparent front plate can be abolished, it does not impair the design like the one with the transparent front plate insertion part, and has a clean appearance with a flat feeling on the entire surface. can do. In addition, dust, dust or the like does not adhere to and accumulate in the boundary between the transparent front plate insertion portion and the transparent front plate, and this does not stand out linearly.

  Furthermore, the double-sided tape provided to improve the adhesive strength has a relatively weak adhesive force to the resin film, and the double-sided tape may be peeled off from the resin film when the double-sided tape is peeled off as it is. However, since an oxidation assistant is added to the surface of the resin film to which the double-sided tape is bonded, the adhesion between the double-sided tape and the resin film becomes strong with hydrogen bonding, and the double-sided tape is peeled off. When the paper is peeled off, the double-sided tape itself can be prevented from peeling off from the resin film, and the productivity can be improved by eliminating the decrease in workability.

  According to a second invention, in the first invention, the tape bonding surface of the edge frame of the inner box frame is located on the outer edge side of the edge frame, and is open to the inner edge side of the edge frame located on the inner edge side of the edge frame. It is set as the structure provided with several notch grooves.

  As a result, when the double-sided tape is attached to the edge frame of the inner box frame, air bubbles that tend to occur between the double-sided tape and the edge frame will come out of the notch grooves, making it easy to attach the double-sided tape. At the same time, not only can the time be shortened, but the provision of a notch groove enables reliable bonding of double-sided tape without bubbles, even if the bonding area is reduced, improving productivity and improving adhesive strength. Both improvements can be achieved.

According to a third invention, in the first or second invention, the adhesive strength between the resin film and the urethane foam is at least 1.0 g / cm 2 or more.

  This ensures the adhesive strength between the resin film and the urethane foam even if the urethane foam undergoes thermal shrinkage, and as a result, maintains the adhesive strength of the transparent front plate over a long period of time. Can be reliable.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
1 is an external perspective view of the refrigerator according to Embodiment 1 of the present invention, FIG. 2 is a sectional view of the refrigerator, FIG. 3 is a perspective view showing one of the doors of the refrigerator, and FIG. 4 is an exploded view of the refrigerator door. FIG. 5 is a cross-sectional view taken along the line AA in FIG. 3, FIG. 6 is a cross-sectional view taken along the line BB in FIG. 3, FIG. The expanded sectional view which shows the door edge part of the refrigerator, FIG. 9 is a schematic diagram explaining the lamination | stacking state from the glass plate in a door of the refrigerator to urethane foam.

  1 and 2, the refrigerator body 1 includes a metal (for example, iron plate) outer box 2 that opens forward, an inner box 3 that is made of hard resin (for example, ABS), an outer box 2, and an inner box 3. It consists of the hard foaming urethane 4 foam-filled between. The refrigerator main body 1 is located inside the refrigerator compartment 5, the switching chamber 6 located below the refrigerator compartment 5, the ice making chamber 7 juxtaposed to the switching chamber 6, and the switching chamber 6 and the lower part of the ice making chamber 7. It has a freezer compartment 8 and a vegetable compartment 9 located below the freezer compartment 8. Further, the front surface of the refrigerator compartment 5 is opened and closed freely by, for example, double doors 10 and 10, and the front portions of the switching chamber 6, the ice making chamber 7, the freezer compartment 8 and the vegetable compartment 9 are drawn out doors 11 and 10. 12, 13 and 14 are closed freely.

There is a cooling chamber 16 on the back surface of the refrigerator body 1, and a cooler 17 that generates cool air and a blower fan 18 that supplies the cool air to each chamber are provided. In addition, a compressor 19 is provided at the back of the top of the main body of the refrigerator body 1, and a condenser (not shown), a heat radiating pipe 20, a capillary tube 21, and the cooler 17 described above are provided. A refrigerant is enclosed in a refrigeration cycle that is sequentially connected in an annular manner, and a cooling operation is performed.

  Here, each of the doors 10 to 14 is foamed and filled with hard urethane like the refrigerator body 1 so as to have heat insulation properties, and its front surface is made of a transparent front plate such as a glass plate in order to further improve the design. It is.

  Hereinafter, the structure of the door 10 will be described with reference to FIGS. The doors 11 to 14 other than the door 10 have the same configuration.

  3 to 8, reference numeral 23 denotes an inner box frame that is located inside the refrigerator main body 1 and is formed of, for example, ABS resin. Reference numeral 24 denotes an edge frame bonded and fixed to the peripheral end surface of the inner box frame 23, and is formed of ABS resin. Reference numeral 25 denotes a transparent front plate (hereinafter referred to as a glass plate) such as a glass plate laminated on the edge frame 24 so as to cover the inner box frame 23. In this embodiment, it is formed of a glossy tempered glass plate. It is.

  As shown in FIG. 5, the glass plate 25 has a resin film 27 attached to the inner surface thereof with an adhesive 26 in order to cope with peeling caused by the colored layer. As shown in FIG. 9, the resin film 27 is formed with a colored layer 28-1 on the surface on the glass plate 25 side and a hairline 28-2 on the surface on the foamed urethane side, which will be described later, opposite to the glass plate 25. Thereby, the glass plate 25 becomes a colored glass plate with a hairline. In this embodiment, the resin film 27 is made of polyethylene terephthalate having high transparency and high mechanical strength, the colored layer 28-1 is formed on the glass plate side, and the hairline 28-2 is formed on the urethane foam side. In addition, when setting it as the white type colored layer which does not form the hairline 28-2, you may form a colored layer in the surface on the opposite side to the glass plate 25. FIG.

  29 is a hard urethane filled and foamed in a space between the surface of the glass plate 25 on the side of the resin film 27 and the inner box frame 23 and the edge frame 24, and the glass together with the inner box frame 23 and the edge frame 24 by foaming. The glass plate 25 is adhered to and held on the resin film 27 on the inner surface of the plate 25 via the resin film 27.

  Here, the foamed urethane 29 has a foam density set higher in the outer peripheral portion than in the central portion of the glass plate 25.

  Further, the edge frame 24 of the inner box frame 23 and the outer peripheral portion of the resin film 27 mounted on the inner surface of the glass plate are bonded via a double-sided tape 30. And in order to reinforce the adhesive force with the said double-sided tape 30, the oxidation adjuvant 31 which consists of titanium oxide etc. is added to the outer peripheral part of the said resin film 27, as shown in FIG. As a result, the glass plate 25 is strongly bonded and held to the foamed urethane 29 and is also bonded and held to the edge frame 24 by the double-sided tape 30.

  As shown in FIG. 7, the double-sided tape 30 includes a horizontal tape portion 30 a positioned along the upper and lower horizontal edges of the glass plate 25 and a vertical tape portion 30 b positioned along the left and right edges of the glass plate 25. The horizontal tape portion 30a is affixed to the edge frame 24 in such a manner that the horizontal width of the glass plate 25 is located almost full and the short side surface of the vertical tape portion 30b is abutted against the long side surface.

  The tape bonding surface of the edge frame 24 includes a flat portion 24a located on the outer edge side of the edge frame, and a plurality of cutout grooves 24b located on the inner edge side of the edge frame and opened to the inner edge side of the edge frame. The double-sided tape 30 is attached to the peripheral edge of the resin film 27 corresponding to the edge frame 24.

  Further, as shown in FIG. 8, the double-sided tape 30 has a tape inner edge 30c protruding beyond the inner edge 24e of the edge frame 24 to a bonding surface between the urethane foam 29 near the center and the resin film 27, and the urethane foam. 29 and the resin film 27.

  Further, the edge frame 24 of the inner box frame 23 does not have the colored glass plate insertion portion as described in the conventional example, and the outer peripheral edge of the glass plate 25 has an edge as shown in FIGS. The configuration is such that it is positioned slightly inside the end surface 24 c of the frame 24.

  In addition, in this embodiment, as shown in FIG. 5, the edge frame 24 of the inner box frame 23 projects forward from the front surface of the glass plate 25 to the portion located on the lower end surface of the glass plate 25. A transparent front plate support piece (hereinafter referred to as a glass plate support piece) 24d that is superposed on the lower end surface of the glass plate with a size that does not have a size is provided to support the weight of the glass plate 25.

  In the above configuration, the door 10 of the refrigerator has the glass plate 25 bonded and held with foamed urethane 29 and the outer peripheral portion of the glass plate 25 is bonded to the edge frame 24 of the inner box frame 23 by the double-sided tape 30. The glass plate 25 is bonded to the edge frame 24 via the double-sided tape 30 in addition to bonding to the urethane foam 29. Therefore, the glass plate 25 with the colored layer to which the resin film 27 is attached is strongly bonded and held to both the urethane foam 29 and the edge frame 24, and the adhesive strength of the glass plate 25 is maintained over a long period of time. Can be ensured.

  In addition, since the double-sided tape 30 adheres the outer periphery of the resin film 27 on the inner surface of the glass plate to the edge frame 24 of the inner box frame 23, water on the door is prevented from entering the door inward from the door end. It will also prevent. Therefore, it is possible to reliably prevent the peeling of the foamed urethane 29 and the resin film 27 on the inner surface of the glass plate due to the intrusion of water, and it is possible to reliably secure the adhesion of the glass plate 25 over a long period of time. .

  That is, the refrigerator has a large temperature difference between the inside and the outside, and the end of the glass plate 25 of the door is affected by condensation and severe temperature changes due to the cold air from the inside when the door is opened and closed. Further, depending on the usage of the user, the door may be subjected to a severe impact during opening and closing, or the door including the glass plate 25 may overflow with water or juice when the stored items are put in and out. And if there is no glass plate insertion part which covers the said glass plate edge part by the use environment and the actual condition peculiar to such a refrigerator, the water etc. which hung on the door edge part will infiltrate into the door inside. It is easy to peel off from the urethane foam 29.

  Under such circumstances, in the present invention, the resin film 27 on the inner surface of the glass plate serving as the door end portion and the edge frame 24 of the inner box frame 23 are bonded by the double-sided tape 30, so that these glass plates 25 The double-sided tape 30 reliably prevents the entry of water or the like from between the edge frame 24 and the inside of the door. Therefore, it can prevent that the water etc. penetrate | invade into the door inward from a door edge part, and the adhesion peeling of the glass plate 25 and urethane foam 29 arises, and the adhesive strength of the glass plate 25 and urethane foam 29 over a long period of time. Can be ensured.

In particular, the double-sided tape 30 has a configuration in which the short side surface of the vertical tape portion 30b is abutted against the long side surface of the horizontal tape portion 30a disposed along the upper and lower horizontal edges of the glass plate 25. Since the horizontal top part 30a of the double-sided tape 30 is located without any break across the entire length of the door upper part, which is likely to enter inward due to gravity, even if water is splashed on the part. Water can be reliably prevented from entering the glass, and the reliability of the adhesion and holding of the glass plate 25 can be further enhanced. The tape bonding surface of the edge frame 24 of the inner box frame 23 includes a flat portion 24a located on the outer edge side of the edge frame, and a plurality of notch grooves 24b located on the inner edge side of the edge frame and opened to the inner edge side of the edge frame. Therefore, when the double-sided tape 30 is affixed to the edge frame 24 of the inner box frame 23, bubbles that are likely to be generated between the double-sided tape 30 and the edge frame 24 are smoothly removed from the plurality of cutout grooves 24b. As a result, it is possible to reliably bond the double-sided tape 30 without air bubbles, and the adhesive strength of the glass plate 25 can be further improved.

  On the other hand, as described above, the double-sided tape 30 that improves the adhesive strength of the glass plate 25 has a relatively weak adhesive force to the resin film 27. It may be peeled off and workability may be reduced. In particular, in this embodiment, the notch groove 24b is provided in the double-sided tape 30 in order to facilitate the tape application work of the double-sided tape 30, and the adhesion area is reduced, so that it is easily peeled off from the resin film 27. However, in this invention, since the oxidation assistant 31 is added to the surface of the resin film 27 to which the double-sided tape 30 is bonded, as shown in FIG. 9, the adhesion between the double-sided tape 30 and the resin film 27 is a hydrogen bond. It is possible to prevent the double-sided tape 30 itself from being peeled off from the resin film 27 when the release paper of the double-sided tape 30 is peeled off, and to reduce productivity and improve productivity. .

  In addition, the double-sided tape 30 for bonding the outer peripheral portion of the glass plate 25 and the edge frame 24 of the inner box frame 23 has the tape inner edge 30c beyond the inner edge 24e of the edge frame 24 and the urethane foam 29 and the resin film 27. The resin film 27 can be prevented from being peeled off or torn at the inner edge 24e of the edge frame of the urethane foam 29. it can.

  That is, when the urethane foam 29 undergoes heat shrinkage, the peeling force is concentrated due to the heat shrinkage, and the inner edge 24e of the edge frame 24 is concentrated, and the resin film 27 is easily peeled or torn at this portion. However, when the double-sided tape 30 is positioned so as to straddle the inner edge 24e of the edge frame 24, it was confirmed from the experimental results that the resin film 27 can be prevented from peeling off. There are various reasons for this, but one of them is presumed to ease concentration of the peeling force due to thermal shrinkage of the urethane foam 29. As a result, it is possible to prevent the resin film 27 from being peeled off or torn at the inner edge 24e of the edge frame of the urethane foam 29, to further enhance the reliability of adhesion and retention of the glass plate 25, and to lower the design. Can also be prevented.

  On the other hand, in this refrigerator, since the colored layer 28-1 with the hairline 28-2 is located inside the transparent layer made of the glass plate 25 and the resin film 27, the color is deepened and its design is made of metal. Or it improves greatly compared with the resin-made pre-painting board. In particular, in this embodiment, since the colored layer 28-1 is formed on the resin film 27, the colored layer 28-1 can be formed by a roller or the like. As a result, a fine pattern such as a hairline that could not be obtained can be formed, and the design can be remarkably improved.

  In addition, since the colored layer 28-1 can be formed by a roller or the like, the adhesive strength to the resin film 27 can be managed and ensured even if the adhesive state deteriorates due to thermal shrinkage or aging of the urethane foam. It is possible to reliably prevent the resin film 27 from being peeled off.

  Thereby, when the resin film 27 is positioned between the glass plate 25 and the foamed urethane 29 and both are adhered by the adhesive force of the foamed urethane 29 and the adhesive 26, the colored layer 28-1 is removed from the resin film 27. It is possible to prevent the glass plate 25 from being peeled off from the foamed urethane 29 due to the peeling. Therefore, it is possible to maintain and ensure the adhesive strength of the glass plate with film 25 for a longer period of time.

  Further, in this embodiment, since the foam density of the urethane foam 29 is higher in the outer peripheral portion than in the central portion of the glass plate 25, the adhesive force of the urethane foam 29 is stronger in the outer peripheral portion of the glass plate 25. Become. Thereby, the adhesive force between the resin film 27 of the glass plate 25 and the urethane foam 29 can be more reliably maintained and secured over a long period of time.

  That is, as described above, the refrigerator has an environment in which the end portion of the glass plate 25 is easily peeled off from the urethane foam 29 if there is no glass plate insertion portion that covers the end portion of the glass plate, depending on the use environment / actual condition unique to the refrigerator.

  Correspondingly, in this embodiment, the end portion of the glass plate 25, that is, the outer peripheral portion is bonded to the urethane skin layer in which the foaming density of the urethane foam 29 is high, that is, very finely foamed. The adhesive density between the urethane foam 29 and the resin film 27 of the glass plate 25 is high and strong. Therefore, even when used for a long time, the adhesion between the resin film 27 of the glass plate 25 and the urethane foam 29 is ensured, and the adhesive strength of the glass plate 25 with the film can be maintained and ensured for a long time, so that the reliability can be ensured. is there.

  The adhesive force between the glass plate 25 and the foamed urethane 29 is the result of an accelerated life test. As a result, the adhesive force is 1.0 g / cm 2 or more, preferably 2.6 g / cm 2 or more. The adhesive strength between the resin film 27 and the urethane foam 29 can be reliably ensured even if the adhesive strength is deteriorated due to secular change such as shrinkage, and as a result, the adhesive strength of the glass plate 25 is maintained and guaranteed over a long period of time. It was possible to make it highly reliable.

  The method for measuring the adhesive force is based on “JIS K 6850 (Adhesive—Tensile Shear Adhesive Tensile Shear Adhesive Strength Test Method)”, which is a standard method for measuring the overlapping shear adhesive strength of an adhesive.

  In this embodiment, the resin film 27 is formed of a polyethylene terephthalate film. Since this polyethylene terephthalate has high mechanical strength, the film itself is broken by the secular change accompanying the thermal contraction of the urethane foam 29, and the broken portion It is possible to prevent the peeling of the adhesion of the resin film 27 to the urethane foam 29 from progressing over time, and to ensure the reliability of maintaining the adhesion strength.

  On the other hand, since this door can abolish the conventional glass plate insertion portion covering the peripheral edge of the glass plate by maintaining the adhesive strength, it does not impair the design like the one with the glass plate insertion portion. It is possible to have a clean appearance with a flat feeling on the entire surface. In addition, dust or dust adheres and accumulates at the boundary between the glass plate insertion portion and the glass plate, and this does not stand out linearly, maintaining the initial high design as it is for a long period of time. be able to.

  Furthermore, in this embodiment, a portion of the edge frame 24 of the inner box frame 23 located on the lower end surface of the glass plate 25 is overlapped with the lower end surface of the glass plate without jumping forward from the front surface of the glass plate 25. Since the glass plate support piece 24d to be positioned is positioned, the glass plate 25 is supported by the glass plate support piece 24d of the edge frame 24 of the inner box frame 23 in weight. Therefore, even if the peeling of the glass plate 25 may partially occur due to the deterioration of the adhesive force of the glass plate 25 by the urethane foam 29, an abnormal situation such as the dropping of the glass plate 25 is surely prevented. This will greatly improve your sense of security. Further, since the glass plate support piece 24d of the edge frame 24 does not protrude from the front surface of the glass plate, it is not visible from the front surface of the door as in the glass plate insertion portion, and the design and the flat feeling of the entire surface can be maintained. .

In particular, in this embodiment, since the outer peripheral edge of the glass plate 25 is positioned slightly inside the end surface 24c of the edge frame 24, the end surface 24c of the edge frame 24 protects the outer peripheral edge of the glass plate 25. Become. Therefore, for example, it is possible to prevent the outer peripheral edge of the glass plate 25 from hitting a certain object and cracking at the time of door transportation on the production line or door replacement service at the user's house.

  Even if some external force is applied to the glass plate 25 and it should break, this glass plate piece is adhered to the resin film 27 to prevent scattering, and safety in the event of an emergency is also improved. To do.

(Embodiment 2)
FIG. 10 is a sectional view of the door in the second embodiment. In the second embodiment, the adhesive force between the resin film 27 of the glass plate 25 and the urethane foam 29 is further increased.

  That is, an easy adhesion layer 32 is formed on the surface of the resin film 27 on the urethane foam side, and the foamed urethane 29 is bonded via the easy adhesion layer 32.

  The easy-adhesion layer 32 can be formed by subjecting the surface of the resin film 27 to corona treatment or plasma treatment, or applying a polyester resin or acrylic resin.

  Microscopically, the adhesive surface between the resin film 27 and the urethane foam 29 is adhered to the skin layer of the urethane foam and the resin film 27. The skin layer and the resin film 27 have both surfaces thereof. Since it is a smooth surface, there is a risk of peeling at once if it is peeled off. In particular, when the foaming density of the outer peripheral portion of the glass plate is increased and the adhesive surface is used as a skin layer, there is a risk that peeling will spread at the outer peripheral portion of the glass plate.

  However, if the easy-adhesion layer 32 is formed on the surface of the resin film 27 that is in contact with the foamed urethane 29 as in this embodiment, the adhesive strength between the resin film 27 and the foamed urethane 29 is high, and the foaming as described above. The spread of peeling between the urethane skin layer and the resin film 27 can be prevented. Therefore, the adhesive strength between the resin film 27 on the inner surface of the glass plate and the urethane foam 29 can be maintained and ensured over a long period of time, and the reliability can be further improved.

  Moreover, the adhesive strength can be improved even at the central portion of the glass plate where the foaming density of urethane is low and the substantial adhesion area between the urethane foam 29 and the resin film 27 is reduced. In other words, the portion of the urethane foam 29 having a low foaming density and the substantial adhesion area between the foamed urethane 29 and the resin film 27 is reduced by covering the adhesive force with the easy-adhesive layer 32, thereby adhering the foamed urethane 29 and the resin film 27. The strength can be further ensured, and as a result, the adhesive strength of the glass plate 25 can be maintained and ensured over a long period of time, and the reliability can be increased.

  In particular, when the easy-adhesion layer 32 is formed by applying a polyester-based adhesive, the polyester constituting the polyester-based adhesive has a solubility parameter (hereinafter referred to as “SP value”) having an SP value of 10 to urethane. 11 and polyethylene terephthalate which is the material of the film are close to the SP value of 11.3, so that the adhesive strength between them becomes stronger and the maintenance of the adhesive strength is extremely high. In other words, a polyester-based resin (also acrylic-based resin) has an —OH group reacted with an isocyanate at the end to form a urethane-modified resin film, while a urethane foam is an isocyanate-cured polyether polyol. Although the basic resin skeleton is different, the reaction content is the same, so the adhesive strength is improved. Therefore, the adhesive strength of the glass plate 25 can be maintained and ensured over a long period of time, and the reliability can be further enhanced.

  As mentioned above, although main embodiment of this invention was described, the said embodiment was shown as an example in implementing this invention, and can be variously changed within the range which achieves the objective of this invention. Needless to say.

  For example, the glass plate may be replaced with a transparent resin plate, which makes it possible to further secure the adhesive strength by reducing the weight and to reduce the cost.

  Further, the colored layer 28-1 of the resin film 27 may be on the urethane foam side as described above, and the easy adhesion layer 32 used for improving the adhesive strength between the resin film 27 and the urethane foam 29. A urethane binder or a vapor-deposited layer may be used, or a vapor-deposited layer and / or a urethane binder may be further interposed between the easy-adhesion layer 32 and the urethane foam 29. The strength and design of the colored layer can be improved.

  As described above, the present invention can adhere and hold the transparent front plate of the door over a long period of time, enhance the designability, maintain the high designability as it is, and can be a refrigerator with good productivity, It can be widely applied to refrigerators and wine coolers for business use as well as general use.

DESCRIPTION OF SYMBOLS 1 Refrigerator body 2 Outer box 3 Inner box 4, 29 Urethane foam 5 Refrigerating room 6 Switching room 7 Ice making room 8 Freezing room 9 Vegetable room 10, 11, 12, 13, 14 Door 16 Cooling room 17 Cooler 18 Blower fan 19 Compression Machine 20 Heat radiation pipe 21 Capillary tube 23 Inner box frame 24 Edge frame 24a Flat part 24b Notch groove 24c End face 24d Transparent front plate support piece (glass plate support piece)
24e Inner edge 25 Transparent front plate (glass plate)
26 Adhesive 27 Resin film 28 Colored layer 29 Urethane foam 30 Double-sided tape 31 Oxidizing agent 32 Easy adhesion layer

Claims (3)

A refrigerator body having a heat insulating property and a door are provided, and the door includes an inner box frame located inside the refrigerator body, and a transparent front plate disposed on an edge frame of the inner box frame so as to cover the inner box frame, From the colored resin film affixed to the inner surface of the transparent front plate via an adhesive, and the urethane foam filled and foamed in the space between the colored resin film on the inner surface of the transparent front plate, the inner box frame, and the edge frame The transparent front plate has a colored resin film on its inner surface adhered to and held by the urethane foam, and the outer peripheral portion of the colored resin film of the transparent front plate is bonded to the edge frame of the inner box frame with a double-sided tape. and the intended double-sided tape was added oxidizing aid on the surface of the colored resin film for bonding, the urethane foam has a high foaming density of the transparent front plate outer peripheral portion than the foam density of the central portion Refrigerator. The tape bonding surface of the edge frame of the inner box frame includes a flat portion located on the outer edge side of the edge frame, and a plurality of cutout grooves located on the inner edge side of the edge frame and opened to the inner edge side of the edge frame. Item 10. The refrigerator according to Item 1. The refrigerator according to claim 1 or 2, wherein the adhesive strength between the resin film and the urethane foam is at least 1.0 g / cm 2 or more.

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