JP6495661B2 - Door - Google Patents

Description

The present invention relates to a door body. More specifically, the present invention relates to a door body having a transparent glass front panel.

In recent years, glass has opened and closed the front panel of the door body and the opening of the main body plane of articles such as refrigerators, washing machines, cupboards, and clothes racks due to its transparent design. It attracts attention as a member constituting the flat panel of the lid. However, glass has a problem that it has low impact resistance and is easily broken. Therefore, it has been proposed to attach a resin sheet (decorative sheet) to which a design is applied to the back side of the glass front panel, which also serves to prevent scattering (for example, Patent Document 1). However, in this technique, in the process of filling the foam heat insulating material, the front edge of the support body of the frame body that supports the glass front panel from the back side is strongly pressed against the decorative sheet and pressed from the front side. There is a problem of the design property that it can be observed as a mark.

JP 2014-062709 A

The subject of this invention is a door which has a transparent glass-made front panel, Comprising: It is providing the door which has high design property in which the problems of design property, such as pressing trace, were solved.

As a result of earnest research, the present inventor has found that the above problem can be achieved by a door having a specific configuration.

That is, the present invention is a door body that opens and closes a front opening of an article, and is a transparent glass front panel that constitutes a front surface; an outer peripheral plate that supports an outer peripheral end of the front panel; A frame having a support plate extending inward in the direction of the article; and a back panel constituting the back; and inside the article formed by the front panel, the frame, and the back panel Filled with a heat insulating material; a decorative sheet is bonded so as to cover the entire back side of the front panel; the front panel is bonded to the support plate with a double-sided adhesive film through the decorative sheet; The extension length to the inside of the article is 10 mm or more; the thickness of the support plate is 1 mm or more; the curvature radius of the front side corner of the front edge of the support plate is 0.1 to 10 mm; Adhesive film supports the above The thickness of the double-sided adhesive film is 200μm or more; from the tip edge, extending therefrom and into the interior of the article is a door body.

A second invention is the door according to the first invention, wherein the decorative sheet has a metallic design.

3rd invention is an article | item containing the door body as described in 1st invention or 2nd invention.

The door body according to the present invention has a high designability because problems of designability such as pressing marks are solved. Therefore, it can be suitably used as a door for an article such as a refrigerator.

In this specification, the term “sheet” is used as a term including a film. The term “resin” is used as a term including a resin mixture containing two or more resins and a resin composition containing components other than resins. The term “door” is used as a term including a lid. The term “front panel” is used as a term including a flat panel.

Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is an exploded perspective view showing an example of the front panel, the frame body, and the back panel of the door body of the present invention. FIG. 2 is a partially enlarged view of a cross section of the door body shown in FIG. FIG. 3 is a cross-sectional view of the door shown in FIG.

In the embodiment shown in FIGS. 1 to 3 of the present invention, a transparent glass front panel 2 constituting the front surface; an outer peripheral plate 1a, and a support plate 1b extending from the outer peripheral plate 1a to the inside of the article in a substantially vertical direction. And a back panel 5 constituting the back surface. A decorative sheet 3 is bonded to the entire back surface of the front panel 2 to enhance the design. Moreover, when the front panel 2 is damaged by this, the effect which prevents that glass scatters is acquired. The front panel 2 is supported and fixed at the outer peripheral end thereof by the outer peripheral plate 1 a of the frame body 1. Further, the front panel 2 is supported and fixed in the vicinity of the outer peripheral edge of the back surface thereof by being bonded to the support plate 1b with the adhesive film 4 (not shown in FIG. 1) via the decorative sheet 3. . That is, the decorative sheet 3 and the support plate 1 b are directly bonded by the adhesive film 4. The interior of the article formed by the front panel 2, the frame body 1 and the back panel 5 is filled with a heat insulating material 6 (not shown in FIG. 1).

The double-sided pressure-sensitive adhesive film 4 may be formed by punching the film into a square shape (left side in FIG. 4), or may be used in combination with a tape-like one (right side in FIG. 4). It is preferable that the double-sided pressure-sensitive adhesive film 4 is attached so as to cover the entire bonding surface of the support plate 1b with the decorative sheet 3. Durability troubles such as peeling after a long period of time can be prevented. The double-sided pressure-sensitive adhesive film 4 extends from the front edge of the support plate 1b to the inside of the article, and even if the heat insulating material is strongly pressed against the support plate 1b in the step of filling the heat insulating material, the front edge of the support plate 1b And the decorative sheet 3 are not directly in contact with each other. Thereby, it is possible to prevent the pressing marks from being generated. In order to prevent the front edge of the support plate 1b and the decorative sheet 3 from coming into direct contact, the front edge of the support plate 1b and the front edge of the double-sided pressure-sensitive adhesive film 4 are aligned. However, it is configured to extend from the viewpoint of workability when manufacturing the door body. The extension length 4a is preferably 1 mm or more, more preferably 3 mm or more. The upper limit of the extension length 4a is not particularly limited, but may be preferably 15 mm or less, more preferably 10 mm or less from the viewpoint of cost.

The thickness of the double-sided pressure-sensitive adhesive film 4 is 200 μm or more, preferably 400 μm or more, more preferably 700 μm or more, and still more preferably from the viewpoint of interposing between the leading edge of the support plate 1 b and the decorative sheet 3 and expressing the cushion function. Is 900 μm or more, most preferably 1500 μm or more. The upper limit of the thickness is not particularly limited, but is preferably 3000 μm or less, more preferably 2000 μm or less from the viewpoint of cost. Note that the thickness of the double-sided pressure-sensitive adhesive film 4 is preferably determined in consideration of the bending resistance and elongation resistance of the printed pattern layer of the decorative sheet. For example, since the printed pattern layer formed by vapor deposition of metal, metal oxide, or the like has low bending resistance and elongation resistance, the double-sided adhesive film 4 is preferably thick.

As the double-sided pressure-sensitive adhesive film 4, the support plate 1b and the decorative sheet 3 can be bonded with sufficient strength, preferably the support plate 1b and the decorative sheet 3 are bonded with sufficient strength. It is not limited except that it can exhibit a good cushion function, and any adhesive film can be used. The double-sided pressure-sensitive adhesive film 4 may be one in which an adhesive layer is formed on both sides of an arbitrary film substrate, or one that is formed only with an adhesive layer (one that does not have a film substrate). Good.

The material used for the frame 1 is not particularly limited as long as the material can maintain the strength and rigidity required for the frame of the door, and any material can be used. Preferably, the frame body 1 is made of acrylonitrile / butadiene / styrene copolymer resin (ABS) from the viewpoint of maintaining the strength and rigidity required for the frame body of the door body, meeting the demand for weight reduction of the door body, and improving the heat insulation performance. Resin) and so-called hard plastics such as rubber-modified polystyrene (HIPS). This frame 1 can be obtained by molding these resins using, for example, an injection molding machine. The frame 1 may be integrally molded, and is arbitrarily divided (for example, divided into a plane, a bottom, a right side, and a left side; divided into an outer peripheral plate 1a and a support plate 1b). ) And molded and assembled using any method (eg, fitting, bonding, heat fusing, etc.).

The length 1d of the support plate 1b of the frame 1 extending from the outer peripheral plate 1a of the frame 1 to the inside of the article in the substantially vertical direction is such that the front panel 2 is placed on the back surface of the front panel 2 via the decorative sheet 3. It is 10 mm or more, preferably 20 mm or more so that the vicinity of the outer peripheral edge can be reliably supported and fixed. The upper limit of the length 1d is not particularly limited, but if the support plate 1b is long, a higher level of mechanical strength is required, and therefore it may be preferably 100 mm or less, more preferably 50 mm or less.

The thickness 1e of the support plate 1b of the frame 1 is 1 mm or more, preferably 1.5 mm or more, more preferably 2 mm or more from the viewpoint of withstanding the pressure of the heat insulating material applied to the support plate 1b in the step of filling the heat insulating material. . The upper limit of the thickness 1e is not particularly limited, but may be preferably 10 mm or less, more preferably 5 mm or less from the viewpoint of meeting the demand for thin doors.

The front side corner 1c of the front edge of the support plate 1b of the frame 1 is strongly pressed by the heat insulating material against the support plate 1b in the step of filling the heat insulating material, and the front edge of the support plate 1b is placed on the decorative sheet via the adhesive film 4 Even when 3 is pressed, the radius of curvature is 0.1 mm or more, preferably 0.2 mm or more, in order to prevent the occurrence of pressing marks. On the other hand, in the vicinity of the corner 1c, the curvature radius is 10 mm or less, preferably 5 mm or less, more preferably 2 mm or less, from the viewpoint of preventing the generation of voids without being filled with the heat insulating material.

The radius of curvature is defined as follows. As shown in FIG. 5, the length from the point M to the point N of the curve is ΔS; the difference between the slope of the tangent line at the M point and the slope of the contact point at the point N is Δα; When the intersection of the straight line intersecting at the M point and the tangent line at the N point and the straight line intersecting at the N point is O; and ΔS is sufficiently small, the curve from the M point to the N point Can approximate an arc. The radius at this time is defined as the radius of curvature. When the radius of curvature is R, ∠MON = Δα, and when ΔS is sufficiently small, Δα is also sufficiently small, so ΔS = RΔα is established, and R = ΔS / Δα.

The material used for the back panel 5 is not particularly limited as long as the material can maintain the strength and rigidity necessary for the back panel of the door, and any material can be used. Preferably, the back panel 5 is made of acrylonitrile / butadiene / styrene copolymer resin (ABS) from the viewpoint of maintaining the strength and rigidity required for the back panel of the door body, meeting the demand for weight reduction of the door body, and improving the heat insulation performance. Resin) and so-called hard plastics such as rubber-modified polystyrene (HIPS). This back panel 5 can be obtained, for example, by using an injection molding machine and molding these resins. The back panel 5 may be integrally molded, may be arbitrarily divided, and may be integrally molded with the frame 1.

The decorative sheet 3 is bonded so as to cover the entire back side of the glass front panel 2 and enhances the design of the door body. Moreover, the function as a scattering prevention sheet is expressed. As the decorative sheet 3, for example, in order from the front side, a laminate having “adhesive layer / transparent resin sheet / printed pattern layer / colored resin sheet / anchor coat”, “adhesive layer / printed pattern layer / transparent resin sheet” A laminate having “/ colored resin sheet / anchor coat” and a laminate having “pressure-sensitive adhesive layer / printed pattern layer / colored resin sheet / anchor coat” can be preferably used.

The said transparent resin sheet and the said colored resin sheet are sheets used as the base material for forming an adhesive layer, a printing pattern layer, and an anchor coat. The colored resin sheet serves as a concealing layer that prevents the support plate 1b and the heat insulating material 6 of the frame 1 from being observed from the front side.

The transparent resin sheet or the colored resin sheet is not limited, and any transparent resin sheet or colored resin sheet can be used. For example, polyester resins such as aromatic polyester and aliphatic polyester; acrylic resins; polycarbonate resins; poly (meth) acrylimide resins; polyolefin resins such as polyethylene, polypropylene, and polymethylpentene; cellophane, triacetyl Cellulosic resins such as cellulose, diacetylcellulose, and acetylcellulose butyrate; polystyrene, acrylonitrile / butadiene / styrene copolymer resin (ABS resin), styrene / ethylene / butadiene / styrene copolymer, and styrene / ethylene / butadiene / styrene Styrene resins such as copolymers; polyvinyl chloride resins; polyvinylidene chloride resins; fluorine-containing resins such as polyvinylidene fluoride; other, polyvinyl alcohol, ethyl It may be mentioned a transparent resin sheet or colored resin sheet such as; vinyl alcohol, polyether ether ketone, nylon, polyamide, polyimide, polyurethane, polyether imide, polysulfone, polyether sulfone. These sheets include an unstretched sheet, a uniaxially stretched sheet, and a biaxially stretched sheet. Moreover, the laminated sheet which laminated | stacked 1 or more types of these 2 or more layers is included.

Among these, an amorphous or low crystalline aromatic polyester-based resin sheet and a polyvinyl chloride-based resin sheet are preferable from the viewpoints of design properties and scattering prevention functions.

The amorphous or low crystalline aromatic polyester resin sheet is a resin or resin composition mainly containing an amorphous or low crystalline aromatic polyester resin (usually 50 mass% or more, preferably 75 mass% or more). It is a sheet made of material.

Examples of the amorphous or low crystalline aromatic polyester resin include aromatic polyvalent carboxylic acid components such as terephthalic acid, isophthalic acid, orthophthalic acid, naphthalenedicarboxylic acid, ethylene glycol, diethylene glycol, neopentyl glycol, 1 , 2-butanediol, 1,3-butanediol, 1,4-butanediol, 1,5-pentanediol, 3-methyl-1,5-pentanediol, 2-methyl-1,3-propanediol, 1 Polyester copolymers with polyhydric alcohol components such as 1,4-cyclohexanedimethanol can be exemplified. More specifically, a glycol-modified polyethylene terephthalate containing 45 to 50 mol% terephthalic acid, 30 to 40 mol% ethylene glycol, and 10 to 20 mol% 1,4-cyclohexanedimethanol (100 mol%). PETG); glycol modified polycyclohexylene dimethylene terephthalate (PCTG) containing 45-50 mol% terephthalic acid, 16-21 mol% ethylene glycol and 29-34 mol% 1,4-cyclohexanedimethanol; 25-49 terephthalic acid Acid-modified polycyclohexylenedimethylene terephthalate (PCTA) containing 0.5 mol%, 0.5 to 25 mol% of isophthalic acid and 45 to 50 mol% of 1,4-cyclohexanedimethanol; 45 to 50 mol% of terephthalic acid, isophthalic acid 5-0 mol of acid And a copolymer comprising 25 to 45 mol% 1,4-cyclohexanedimethanol, 25 to 5 mol% 2,2,4,4, -tetramethyl-1,3-cyclobutanediol; and 30 to 45 terephthalic acid Acid-modified and glycol-modified polyethylene terephthalate containing 5% by mole, 5-20% by mole of isophthalic acid and 35-48% by mole of ethylene glycol, 2-15% by mole of neopentyl glycol, less than 1% by mole of diethylene glycol, and less than 1% by mole of bisphenol A; The 1 type (s) or 2 or more types of mixture can be mention | raise | lifted.

In this specification, using a Diamond DSC type differential scanning calorimeter of Perkin Elmer Japan Co., Ltd., holding the sample at 320 ° C. for 5 minutes, then cooling to −50 ° C. at a temperature decreasing rate of 20 ° C./min, A polyester having a heat of fusion of 10 J / g or less in the melting curve obtained by performing DSC measurement with a temperature program of holding at 50 ° C. for 5 minutes and then heating to 320 ° C. at a temperature increase rate of 20 ° C./min. A polyester having a property of more than 10 J / g and not more than 60 J / g was defined as low crystallinity.

The printed pattern layer is provided for imparting high designability to the decorative sheet 3 and can be formed by printing an arbitrary pattern using an arbitrary ink and an arbitrary printing machine. The printed pattern layer may also be formed to serve as a concealing layer instead of the colored resin sheet. Moreover, in order to give a metallic design, aluminum, tin, titanium, indium and oxides thereof are directly or via an anchor coat on the front or back surface of the transparent resin sheet, or a colored resin sheet. The entire surface or a part of the surface may be deposited by a known method.

The above printing may be performed entirely or partially on the front or back surface of the transparent resin sheet or on the front surface of the colored resin sheet directly or through an anchor coat. it can. The above patterns include metal-like patterns such as hairlines, wood grain patterns, stone patterns imitating the surface of rocks such as marble, fabric patterns imitating cloth or cloth-like patterns, tiled patterns, brickwork patterns, parquet patterns , And patchwork. As said printing ink, what mixed the pigment, the solvent, the stabilizer, the plasticizer, the catalyst, the hardening | curing agent, etc. in the binder suitably can be used. Examples of the binder include polyurethane resins, vinyl chloride / vinyl acetate copolymer resins, vinyl chloride / vinyl acetate / acrylic copolymer resins, chlorinated polypropylene resins, acrylic resins, polyester resins, polyamides. Resins such as resin, butyral resin, polystyrene resin, nitrocellulose resin, and cellulose acetate resin, and these resin compositions can be used.

The lamination of the transparent resin sheet and the colored resin sheet is not particularly limited, and can be performed by any method. For example, methods such as thermal lamination and dry lamination can be used.

The heat insulating material 6 can be filled and formed by, for example, injecting a foamable resin into the inside of an article formed by the front panel 2, the frame body 1, and the back panel 5 and foaming.

The foamable resin is not limited, and any foamable resin can be used. For example, polyurethane resins such as thermosetting polyurethane and thermoplastic polyurethane; polyester resins such as thermosetting polyester and thermoplastic polyester; polystyrene, acrylonitrile / butadiene / styrene copolymer resin (ABS resin), styrene / ethylene / butadiene One or a mixture of two or more styrene resins such as styrene copolymers, styrene / ethylene / butadiene / styrene copolymers; polyolefin resins such as polyethylene, polypropylene, and polymethylpentene; and azodicarboxylic acid Azo compounds such as amides; nitroso compounds such as N, N′-dinitrosopentamethylenetetramine; carbonates such as sodium bicarbonate and ammonium bicarbonate; organic acids such as citric acid, sodium citrate and oxalic acid; sodium borohydride ; It can be mentioned a resin composition with one or more blowing agents, such as; the thermal expansion microcapsules; water.

It is preferable that the heat insulating material 6 and the decorative sheet 3, the frame body 1, and the back panel 5 that form the back surface of the front panel 2 are bonded with sufficient strength from the viewpoint of the rigidity of the door body. In order to bond the heat insulating material 6 with sufficient strength, the stock solution of the foamable resin is injected into at least a part, preferably all, of the adhesive sheet 3, the frame 1, and the back panel 5 with the heat insulating material 6. It is preferable to form an anchor coat before doing so.

In addition, when the said foamable resin is a polyurethane-type resin or a polyester-type resin, the adhesion | attachment location (surface on the back side of the decorative sheet 3) with the heat insulating material 6 of a decorative sheet 3 is an amorphous or low crystal | crystallization. It is preferable that it is formed with a functional aromatic polyester resin sheet. Even if the anchor coat is not formed, sufficient adhesive strength can be obtained.

The configuration of the present invention has been specifically described by way of examples. However, these are merely illustrative examples of the present invention, and those who have ordinary knowledge in the technical field of the present invention can use the present invention. Various modifications are possible without departing from the essential characteristics of the above. The technical idea and technical scope of the present invention are not limited by the embodiments disclosed in the present specification. The technical scope of the present invention should be determined based on the description of the scope of claims, and all the techniques within the equivalent scope are interpreted as being included in the technical scope of the present invention. Should.

It is a disassembled perspective view which shows an example of the front panel of the door body of this invention, a frame, and a back panel. It is the elements on larger scale of the cross section of the door body shown in FIG. It is sectional drawing of the door body shown in FIG. It is a front view which shows an example of the shape of an adhesive film. It is a figure explaining a curvature radius. It is sectional drawing which shows another example of the door body of this invention.

1: Frame 1a: Frame outer peripheral plate 1b: Frame support plate 1c: Front side corner 1d of support plate tip edge: Support plate length 1e: Support plate thickness 1f: Integrated with back panel of frame Molded portion 2: Front panel 3: Cosmetic sheet 4: Adhesive film 4a: Adhesive film extends from the leading edge of the support plate Length 5: Rear panel 5a: Divided and integrally molded with part of the frame Rear panel portion 5b: Divided rear panel portion 6: Insulation

Claims (11)

A door that opens and closes a front opening of an article,
Transparent glass front panel constituting the front;
An outer peripheral plate supporting the outer peripheral edge of the front panel;
A frame having a support plate extending from the outer peripheral plate to the inside of the article in a substantially vertical direction; and a back panel constituting the back surface;
A heat insulating material is filled in an article formed by the front panel, the frame, and the back panel;
A decorative sheet is bonded so as to cover the entire back side of the front panel;
The front panel is bonded to the support plate with a double-sided adhesive film through the decorative sheet;
The extension length of the support plate to the inside of the article is 10 mm or more;
The support plate has a thickness of 1 mm or more;
The radius of curvature of the front side corner of the leading edge of the support plate is 0.1 to 10 mm;
The double-sided adhesive film extends from the leading edge of the support plate to the interior of the article;
The double-sided pressure-sensitive adhesive film has a thickness of 200 μm or more; a door body.
The door body according to claim 1, wherein the double-sided pressure-sensitive adhesive film extends 1 mm or more from the leading edge of the support plate to the inside of the article.
The door body according to claim 1 or 2, wherein an extension length of the support plate into the article is 100 mm or less.
The door body according to any one of claims 1 to 3 , wherein the decorative sheet has a metallic design.
The door according to any one of claims 1 to 4, wherein the decorative sheet includes a colored resin sheet.
The said decorative sheet contains 1 or more types selected from the group which consists of an amorphous aromatic polyester-type resin sheet, a low crystalline aromatic polyester-type resin sheet, and a polyvinyl chloride-type resin sheet of Claims 1-5. The door body described in any one item.
The rearmost surface of the decorative sheet is formed of an amorphous aromatic polyester resin sheet or a low crystalline aromatic polyester resin sheet;
The heat insulating material is formed using a polyurethane-based foaming resin or a polyester-based foaming resin;
The door body according to any one of claims 1 to 6.
The door body according to any one of claims 1 to 7, wherein an anchor coat is formed on at least a part of an adhesion portion between the decorative sheet, the frame body, and the heat insulating material of the back panel.
The decorative sheets are in order from the front side.
Laminate having pressure-sensitive adhesive layer / transparent resin sheet / printed pattern layer / colored resin sheet / anchor coat;
A laminate having an adhesive layer / printing pattern layer / transparent resin sheet / colored resin sheet / anchor coat; and
Laminate having pressure-sensitive adhesive layer / printed pattern layer / colored resin sheet / anchor coat;
The door body according to any one of claims 1 to 8, which is any one of the above.
The frame or the back panel is
Consists of one or more selected from the group consisting of acrylonitrile-butadiene-styrene copolymer resin (ABS resin) and rubber-modified polystyrene (HIPS)
The door body according to any one of claims 1 to 9.
The article | item containing the door body of any one of Claims 1-10.