JP6214485B2 - refrigerator - Google Patents

Description

  The present invention relates to a refrigerator, and in particular, to a configuration of a door serving as a design.

  Generally, doors that can open and close the opening of a refrigerator for home use are provided on the surface of the refrigerator and are important parts in terms of design. Is a condition.

Therefore, in recent years, there are many cases in which tempered glass is adopted as the exterior material of the door, which is a design, and a decorative sheet with decoration such as a color pattern or pattern by printing is attached to the tempered glass. (For example, refer to Patent Document 1).
In patent document 1, although the adhesive is used in order to affix a decorating sheet on tempered glass, it becomes possible to make it adhere only by applying a slight pressure at normal temperature for a short time by using this adhesive. Moreover, it becomes easy to redo the pasting of the decorative sheet to the tempered glass.

JP 2007-120895 A

  In a conventional refrigerator door as described in Patent Document 1, the space surrounded by the outer surface material and the inner surface material is filled with foamed urethane, which is a heat insulating material. As a result, the pressure-sensitive adhesive became soft and the holding adhesive strength was reduced. As a result, there is a problem that the decorative sheet is peeled off from the tempered glass and the design properties are impaired.

  The present invention has been made in order to solve the above-described problems, and an object of the present invention is to provide a refrigerator in which the decorative sheet is prevented from being peeled off due to the foaming heat of the urethane foam and the design property is not impaired.

The refrigerator according to the present invention includes a main body having a front opening, and a door that closes the front opening so as to be freely opened and closed, and the door is an outer surface material that is a flat tempered glass constituting the surface; A decorative sheet that has been decorated to be affixed to the outer surface material , a silicone adhesive that adheres the decorative sheet to the outer surface material, and a frame-shaped cap that covers the outer periphery of the outer surface material. The outer surface material and the cap are pasted with the silicone adhesive .

  According to the refrigerator according to the present invention, since the heat-resistant silicone adhesive is used to attach the decorative sheet to the tempered glass, even if heat of foaming is generated when the foamed urethane is filled, the holding adhesion is achieved. Power does not decrease. Therefore, it can suppress that a decorating sheet peels from tempered glass, and can suppress that designability is impaired.

It is a perspective view of the whole refrigerator which concerns on Embodiment 1 of this invention. It is an exploded view of the door used for the refrigerator which concerns on Embodiment 1 of this invention. It is sectional drawing which shows the lamination | stacking state of the outer surface material of the door used for the refrigerator which concerns on Embodiment 1 of this invention. It is a graph which shows the adhesive strength with respect to time passage of the silicone adhesive which concerns on Embodiment 1 of this invention, and the conventional adhesive. It is a longitudinal cross-sectional view of the door used for the refrigerator which concerns on Embodiment 2 of this invention. It is a longitudinal cross-sectional view of the door used for the refrigerator which concerns on Embodiment 3 of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. The present invention is not limited to the embodiments described below. Moreover, in the following drawings, the relationship of the size of each component may be different from the actual one. In addition, “upper”, “lower”, “left”, and “right” used below are directions when the refrigerator is viewed from the front.

Embodiment 1 FIG.
1 is a perspective view of the entire refrigerator according to Embodiment 1 of the present invention, and FIG. 2 is an exploded view of a door 2 used in the refrigerator according to Embodiment 1 of the present invention.
As shown in FIG. 1, main body 1 constituting the refrigerator according to Embodiment 1 has an opening on the front surface, and door 2 is provided to close the front opening so as to be freely opened and closed.

As shown in FIG. 2, the door 2 includes an outer surface material 3 made of tempered glass serving as an exterior design surface, an inner surface material 4 on the side of a storage room for storing food and beverages, and the outer surface material 3 and the inner surface material 4. Frame-like cap 5 that covers the outer periphery of the outer periphery, outer surface material 3, inner surface material 4, and urethane foam 6 that is a heat insulating material filled in a space surrounded by cap 5.
When the urethane foam 6 is filled, foaming heat of about 140 ° C. at maximum is generated.

  The cap 5 includes a resin upper cap 5a, a lower cap 5b, a right cap 5c, and a left cap 5d. The upper cap 5a and the lower cap 5b are provided with claw portions (not shown) at both ends in the longitudinal direction. Further, the right cap 5c and the left cap 5d are provided with grooves (not shown) on the back surface in the longitudinal direction and at positions facing the claw portions of the upper cap 5a and the lower cap 5b when connected. The upper cap 5a, the lower cap 5b, the right cap 5c, and the left cap 5d are connected in a frame shape by engaging the claw portions of the upper cap 5a and the lower cap 5b with the grooves of the right cap 5c and the left cap 5d. Has been.

  In the first embodiment, the upper cap 5a and the lower cap 5b are provided with claws, and the right cap 5c and the left cap 5d are provided with grooves. Moreover, the cap 5 is not limited to the structure which engages a nail | claw part with a groove part as mentioned above, and makes it frame shape, For example, it is good also as an integral frame-shaped cap.

FIG. 3 is a cross-sectional view showing a stacked state of the outer surface material 3 of the door 2 used in the refrigerator according to Embodiment 1 of the present invention.
As shown in FIG. 3, the outer surface material 3 has a transparent tempered glass 3a, a decorative sheet 3b made of, for example, PET, and a decorative sheet 3b printed with decoration such as a color pattern or pattern by printing. Are applied between, for example, a protective sheet 3c made of PVC, a tempered glass 3a and a decorative sheet 3b, and a decorative sheet 3b and a protective sheet 3c. And a moisture-curing type silicone adhesive 7 for adhering.

  As a method for decorating the door 2, in addition to the above, there is a method in which printing such as a color pattern or a pattern is directly applied to the tempered glass 3a, and a protective sheet 3c is attached thereon. However, it is difficult to decorate complicated color patterns and patterns. Therefore, in the first embodiment, a decoration sheet 3b having a high degree of freedom of decoration (that is, a difficult color pattern or pattern can be decorated) and a decoration applied to the tempered glass 3a is pasted. The method.

  The moisture-curing type silicone adhesive 7 is in a liquid or gel state that is fluid in the initial state (as soon as it is applied), but at room temperature, moisture in the air and hydroxyl groups (OH) on the surface of the adherend are used. ) And is cured by a chemical reaction. Therefore, when applied between the tempered glass 3a and the decorative sheet 3b, it hardens by chemically reacting with the hydroxyl group (OH) on the surface of the tempered glass 3a, and the decorative sheet 3b and the protective sheet 3c When they are applied between the two, they are cured by chemical reaction with moisture in the air, so that they can be firmly bonded.

  FIG. 4 is a graph showing the adhesive strength over time of the silicone adhesive 7 according to Embodiment 1 of the present invention and the conventional pressure-sensitive adhesive. The horizontal axis indicates time, and the vertical axis indicates adhesive strength. Further, the construction on the horizontal axis in FIG. 4 indicates the time during which the adhesive or the pressure-sensitive adhesive is applied (or pasted) to the adherend.

For example, as shown in FIG. 4, a pressure-sensitive adhesive such as a double-sided tape has a certain degree of adhesive strength from the time of construction, and the strength does not change much over time.
On the other hand, the moisture-curing type silicone adhesive 7 is in a liquid or gel state having fluidity in the initial state at the time of construction, and its adhesive strength is lower than that of the pressure-sensitive adhesive. However, the adhesive strength becomes higher than that of the pressure-sensitive adhesive when it is cured by chemical reaction with moisture in the air and hydroxyl groups (OH) on the surface of the adherend as time passes. And after hardening, it becomes silicone rubber, and its softness hardly changes from -50 ° C to 200 ° C, so it is hardly affected by heat, and softens by the heat of foaming of foamed urethane 6 like a pressure-sensitive adhesive, and holding adhesive strength Will not drop. In other words, the silicone adhesive 7 has heat resistance and can withstand the heat of foaming (up to about 140 ° C.) generated when the urethane foam 6 is filled.

  As described above, since the silicone adhesive 7 is in a fluid liquid or gel state in the initial state at the time of construction, it can be uniformly applied to the tempered glass 3a and the decorative sheet 3b which are adherends. It has the characteristics.

  Moreover, since it hardens | cures by reacting with the water | moisture content in air and the hydroxyl group (OH) of the surface of a to-be-adhered body, the tempered glass 3a and the decorating sheet 3b, and the decorating sheet 3b and the protective sheet 3c are strong at an interface. It has a high adhesive strength. Therefore, it has water resistance. For example, when condensation occurs on the door 2, it can be prevented from being wetted by water like a pressure-sensitive adhesive to reduce the holding adhesive force and peel off.

  As described above, according to the silicone adhesive 7 according to the first embodiment, since it cures by chemically reacting with moisture in the air and hydroxyl groups (OH) on the surface of the adherend, The decorative sheet 3b, and the decorative sheet 3b and the protective sheet 3c can be firmly connected. In addition, the decorative sheet has heat resistance (that is, a heat resistance temperature higher than about 140 ° C.) that can withstand the heat of foaming (up to about 140 ° C.) generated when the urethane foam 6 is filled. It is possible to suppress peeling and floating of the 3b and the protective sheet 3c, and to prevent the designability from being impaired.

Embodiment 2. FIG.
FIG. 5 is a longitudinal sectional view of the door 2 used in the refrigerator according to Embodiment 2 of the present invention. In addition, the figure of the point of the arrow in FIG. 5 has shown the enlarged view of the part enclosed with the dotted line.
Hereinafter, although Embodiment 2 will be described, the same elements as those in Embodiment 1 are omitted, and the same or corresponding parts as those in Embodiment 1 are denoted by the same reference numerals.

In the second embodiment, the silicone adhesive 7 is also used when the cap 5 is fixed to the outer surface material 3.
When the cap 5 is pasted and fixed to the outer surface material 3 with an adhesive as in the prior art, when the foamed urethane 6 is filled, the urethane foam 6 enters the gap formed between the outer surface material 3 and the cap 5. Resulting in. If it does so, since the adhesive between the outer surface material 3 and the cap 5 becomes soft by the foaming heat of the foamed urethane 6 and the holding adhesive force is reduced, the outer surface material 3 and the cap 5 are easily peeled off. Furthermore, discoloration occurred in the decorative sheet 3b due to the peeling of the outer surface material 3 and the cap 5, and the designability was impaired.

However, when the cap 5 is attached to the outer surface material 3 with the silicone adhesive 7 as shown in FIG. 5, even if the urethane foam 6 enters the gap between the outer surface material 3 and the cap 5, Since it has heat resistance that can withstand (about 0 ° C.), peeling of the outer surface material 3 and the cap 5 can be suppressed. Furthermore, it is possible to suppress the occurrence of discoloration in the decorative sheet 3b resulting from the peeling of the outer surface material 3 and the cap 5, and it is possible to suppress the deterioration of the design.
The silicone adhesive 7 may be applied to the outer surface material 3 or the cap 5.

Embodiment 3 FIG.
FIG. 6 is a longitudinal sectional view of the door 2 used in the refrigerator according to Embodiment 3 of the present invention. In addition, the figure of the point of the arrow in FIG. 6 has shown the enlarged view of the part enclosed with the dotted line.
Hereinafter, although Embodiment 3 will be described, the same elements as those in Embodiment 1 are omitted, and the same or corresponding parts as those in Embodiment 1 are denoted by the same reference numerals.

  In the third embodiment, the silicone adhesive 7 has an end 7a on the inner side of the portion where the silicone adhesive 7 is applied to the outer surface material 3 as shown in FIG. It protrudes to the bonding surface between the urethane foam 6 and the outer surface material 3 beyond the inner end 5e, and is positioned between the urethane foam 6 and the outer surface material 3. That is, no gap is formed inside the outer surface material 3 and the cap 5. By doing so, the urethane foam 6 does not enter the inner gap between the outer surface material 3 and the cap 5, and the adhesion area between the outer surface material 3 and the cap 5 by the silicone adhesive 7 is increased. The peeling between the outer surface material 3 and the cap 5 can be further suppressed.

  Further, as in the second embodiment, the cap 5 may be attached to the outer surface material 3 so that a gap is formed inside the outer surface material 3 and the cap 5 with the silicone adhesive 7. As in Form 3, the inner end portion 7a of the portion where the silicone adhesive 7 is applied to the outer surface material 3 exceeds the inner end portion 5e of the bonding surface with the outer surface material 3 of the cap 5, and the urethane foam 6 and It sticks out so that it may protrude to the adhesive surface with the outer surface material 3, and may be located between the said urethane foam 6 and the outer surface material 3. FIG. Therefore, it is not necessary to strictly align the position where the silicone adhesive 7 is applied, and manufacturing failures can be reduced, productivity can be improved, and costs for discarding defective products can be reduced. .

  In the first to third embodiments, the moisture-curing type silicone adhesive 7 is used as the adhesive. However, the present invention is not limited to this, and the foaming heat generated when the urethane foam 6 is filled (maximum 140). Any other adhesive may be used as long as it is capable of withstanding a temperature of about 0 ° C. and can prevent the decorative sheet 3b, the protective sheet 3c, or the cap 5 from peeling or floating.

  1 Main body, 2 doors, 3 exterior material, 3a tempered glass, 3b decorative sheet, 3c protective sheet, 4 inner surface material, 5 cap, 5a upper cap, 5b lower cap, 5c right cap, 5d left cap, 5e (cap (6) Urethane foam, 7 (silicone adhesive), 7a (inside of the portion where the silicone adhesive is applied to the external material).

Claims (5)

A body having a front opening;
A door that freely opens and closes the front opening,
The door
An outer surface material that is a flat tempered glass constituting the surface;
A decorative sheet that has been decorated to be affixed to the outer surface material;
A silicone adhesive for attaching the decorative sheet to the outer surface material;
A frame-like cap covering the outer periphery of the outer surface material ,
The said outer surface material and the said cap are affixed with the said silicone adhesive agent, The refrigerator characterized by the above-mentioned . The door
An inner surface material constituting the back surface;
Comprising urethane foam which is a heat insulating material filled between the outer surface material and the inner surface material;
The heat resistant temperature of the silicone adhesive is
The refrigerator according to claim 1, wherein the refrigerator heat is higher than the heat of foaming generated when the urethane foam is filled. The refrigerator according to claim 1 or 2, wherein the silicone adhesive is a moisture curing type. A protective sheet for protecting the decorative surface on which the decorative sheet is decorated,
The refrigerator according to any one of claims 1 to 3, wherein the decorative sheet and the protective sheet are pasted with the silicone adhesive. Any inner end of the portion of the silicone adhesive was applied to the outer surface material of claims 1 to 4, characterized in that beyond the inner end portion of the bonding surface between said outer surface material of the cap the refrigerator according to one paragraph or.

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