JPS58136967A - Heat-insulating door of refrigerator, etc. - Google Patents

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

【発明の詳細な説明】 この発明は冷蔵庫等の断熱箱の前面開口部に開閉自在に
枢着した断熱ｎＫ係り、特に断熱扉の製造を簡素化し、
かつ断熱性能を向上させるようＫしたものである。DETAILED DESCRIPTION OF THE INVENTION The present invention simplifies the manufacture of a heat insulating door, especially a heat insulating door, which is pivotally connected to the front opening of a heat insulating box such as a refrigerator.
It is also K-treated to improve heat insulation performance.

従来この種冷賦庫の断熱扉は、＠２図に示すように、鋼
板からなる外面板（３１と内面板（４）とを間隔をあけ
て対向させその外周端縁部を化粧１１１枠（５）で囲ん
で形成した空間にポリウレタン等の発泡断熱材（６）を
充填した扉本体（２）Ｋ食品収納受は等の凸部を形成し
たＡＢ８等のプラスチックシートから成る扉内板（））
をネジ（８）等で組み付けていた。Conventionally, as shown in Fig. 2, the heat insulation door of this type of refrigerator has an outer plate (31) and an inner plate (4) made of steel plates facing each other with a space between them, and the outer peripheral edge of the outer plate (31) is made of a decorative frame (111). 5) The door body is filled with a foamed insulation material (6) such as polyurethane in the space formed by 5) (2) The inner door plate (2) is made of a plastic sheet such as AB8 with a convex portion formed thereon (2). )
were assembled with screws (8), etc.

また冷凍室等の断熱性能を要求される扉体として使用さ
れる場合には扉本体と扉内板間で形成される内部空間部
の空気対流を防止するため第３図忙示すように扉内板の
裏１に発泡スチロールやガラスウール等の断熱材（９）
を挿入した扉内板（７）を扉本体（２）（取付けていた
。しかしながら９個別成形した扉内板（７）と発泡スチ
ロールの断熱材（９）はそれぞれの型寸法の精度や成形
双輪等の寸法誤差の集積により、扉内板（７）と断熱材
（９）との間に生じる空間をなくすことは不可能である
。In addition, when used as a door body that requires heat insulation performance such as in a freezing room, the inside of the door should be designed to prevent air convection in the internal space formed between the door body and the inner door plate, as shown in Figure 3. Insulating material such as styrofoam or glass wool on the back side of the board (9)
The door inner plate (7) into which was inserted was attached to the door body (2).However, the door inner plate (7) and the Styrofoam insulation material (9), which were individually molded, had to be adjusted due to the precision of the dimensions of each mold, the molded twin wheels, etc. Due to the accumulation of dimensional errors, it is impossible to eliminate the space created between the door inner plate (7) and the heat insulating material (9).

このため第４図に示すように外面板（３１０周縁を化粧
側枠（５）に組込むとともに扉内板（７ンを装着し外面
板（３：、化粧側枠（５１および扉内板（７）とで形成
される空間にポリウレタン等の発泡断熱材（６１を注入
発泡する方法が試みられた。For this purpose, as shown in Fig. 4, the periphery of the outer panel (310) is assembled into the decorative side frame (5), and the door inner panel (7) is attached. ), a method of injecting and foaming a foamed heat insulating material (61) such as polyurethane has been attempted.

この製造方法によれば、外面板＋３＋、化粧側枠（５）
および扉内板（７）で形成される空間に発泡断熱材を発
泡充填させるのでスキ間が生じることが無く良好な断熱
性能′に得られる。その上外面板（３Ｉ９発泡断熱材（
６１および扉内板（７）でサンドイッチパネル構造とし
ての強度が得られるため第３図に示す内面板（４１を省
略することができる等の効果を有する。According to this manufacturing method, the outer panel +3+, the decorative side frame (5)
Since the space formed by the door inner plate (7) is filled with foamed heat insulating material, no gaps are created and good heat insulation performance is obtained. Above that, the outer panel (3I9 foam insulation material)
61 and the door inner plate (7) provide the strength of a sandwich panel structure, so that the inner plate (41) shown in FIG. 3 can be omitted.

しかし、島内板（７）に食品収納党勢の土手部１１（１
が成形されているため、断熱材の厚さが異なる部分が生
じるので発泡断熱材が発泡固化する際に合成樹脂等の成
形凝固時に生ずる収縮いわゆるヒケが発生する。そして
このヒケは土手部（１（１に相対する扉外面■に生じて
美観を損い商品価値な低下させる要因となっていた。However, on the island board (7), the food storage party's embankment 11 (1)
Since the insulation material is molded, there are parts where the thickness of the insulation material differs, so when the foam insulation material is foamed and solidified, shrinkage that occurs when a synthetic resin or the like is molded and solidified occurs, so-called sink marks. This sink mark occurred on the outer surface of the door opposite to the bank (1), spoiling the aesthetic appearance and reducing the product value.

この発明は以上述べた欠点を除去することを目的として
されたもので１発泡断熱材の淳さの違いからくる成形収
縮の差を防止するように食品収納受は等の土手部を有す
る扉内板内側面め断熱材′奪発泡し、この扉内板筆体と
外面板な化粧側枠で囲み形成した空間に発泡断熱材を発
泡固化し断熱材の充填厚さを均一にして外面板のヒケの
発生を防止するようＫしたものである。This invention was made with the aim of eliminating the above-mentioned drawbacks. 1. In order to prevent differences in molding shrinkage caused by differences in the thickness of the foam insulation material, food storage receptacles are installed in doors with banked parts, etc. The insulation material on the inner side of the door is foamed, and the foamed insulation material is foamed and solidified in the space formed between the inner side panel of the door and the decorative side frame of the outer panel. K is applied to prevent the occurrence of sink marks.

以下１図示実施例によりこの発明を説明すると、（１）
は断熱箱からなる冷蔵庫本体、（２）はこの冷蔵庫本体
の前面開口部を開閉自在に閉塞する扉本体、＋３）はこ
の扉本体を構成する外面板、（５）は化粧側枠で一端に
外面板＋３１の嵌込溝（ｋ）と他端にドアパツキン（因
示してない）の嵌込溝（Ｓｂ）と扉内板（７）の取付片
（５ｃ）をそれぞれ形成している。ａυは扉内板本体で
、プラスチックシートを真空成形等の成形により食品収
納受は等の土手部ｒｌ＠ｆｆｆｊ成した扉内板（））を
発泡スチロール・成形機型内に挿入し、扉内板（７）内
＠に発泡スチ四−ル断熱材α２を所定の成形方法にて成
形固化させる。いわゆるインサート成形にて扉内板の裏
面を断熱材ａ２　Ｋて平坦に形成させている。The present invention will be explained below with reference to one illustrated example: (1)
(2) is a door body that freely opens and closes the front opening of this refrigerator body; +3) is an outer panel that constitutes this door body; (5) is a decorative side frame at one end. A fitting groove (k) of the outer surface plate +31, a fitting groove (Sb) for a door seal (not shown), and a mounting piece (5c) for the door inner plate (7) are formed at the other end, respectively. aυ is the door inner plate body, and the door inner plate ()), which has been formed by forming the plastic sheet by vacuum forming etc. into the bank part rl@fffj such as the food storage receptacle, is inserted into the Styrofoam molding machine mold, and the door inner plate is formed. (7) Molding and solidifying the foamed steel heat insulating material α2 inside @ using a predetermined molding method. The back side of the door inner plate is made flat using a heat insulating material A2K using so-called insert molding.

そしてこの扉内板本体ａ１を外面板＋３１を嵌込んだ化
粧側枠（！Ｓ）の取付片（Ｓｃ）上にセットし外面板■
化粧側枠（５）および断熱材ａａとで形成される空間に
ポリウレタン等の発泡断熱材（６）を注入発泡固化する
ことにより、外面板１３１．化粧側枠（５）および扉内
板本体１ＩＴＪの断熱材輪は発泡断熱材（６）の接着力
（で固化される。そして化粧側枠の嵌込溝（Ｓｂ）　Ｋ
ドアパツキンを嵌込んで装着することＫより断熱扉体（
１）は完成される。Then, set this door inner panel main body a1 on the mounting piece (Sc) of the decorative side frame (!S) into which the outer panel +31 is fitted, and set the outer panel ■
The outer panel 131. The insulation rings of the decorative side frame (5) and the door inner panel body 1ITJ are solidified by the adhesive force of the foamed insulation material (6).Then, the fitting groove (Sb) of the decorative side frame
Insulating door body (by inserting and installing door gasket)
1) is completed.

この発明は以上述べたように、扉内板を発泡スチロール
等の断熱材の成形機型内にセットし扉内板内側面に断熱
材を成形固化し、扉内板の裏面を平坦に形成したから、
扉内板内面は断熱材との隙間が生じることはなくなり断
熱性能を向上させることができる。また発泡断熱材の厚
さを均一になるよう和して発泡断熱材を発泡固化したの
で発泡過程において外面板にヒケによる凹凸を生ずるこ
とがなくなる。その上発泡断熱材の接着力によって扉内
板本体、化粧側枠。As described above, this invention is based on the fact that the inner door plate is set in a mold of a heat insulating material such as polystyrene foam, the heat insulating material is molded and solidified on the inner surface of the door inner plate, and the back surface of the door inner plate is formed flat. ,
There is no longer a gap between the inner surface of the door inner plate and the heat insulating material, and the heat insulating performance can be improved. Furthermore, since the foamed insulation material is foamed and solidified by uniformizing the thickness of the foamed insulation material, unevenness due to sink marks will not occur on the outer panel during the foaming process. Furthermore, the adhesive strength of the foam insulation material allows the door inner panel body and decorative side frame to be bonded together.

外面板とが接着固化されるので、ネジ等の締付部品や締
付作業を必要としないばかりか内面板をも省くことがで
きるなど植種の効果を有するものである。Since the outer plate is bonded and solidified, there is no need for tightening parts such as screws or tightening work, and the inner plate can also be omitted, which has the effect of planting seeds.

【図面の簡単な説明】[Brief explanation of drawings]

＠１図は冷蔵庫の斜視園、第２図ないし第４図は従来の
実施例を示すもので、纂２図および第３図は断熱ｎな一
部断面にて示す分解斜視図。 第４図は断熱扉を一部断面にて示す斜視図、第５図は第
４図に相当するこの発明による冷蔵庫用断熱扉を一部破
断にして示は斜視図、第６図はこの発明による断熱扉の
製造手順を示す分解斜視図である。 なお図中同一符号は同一、または相当部分な示す。 （２）は扉本体、（３）は外面板、　ｉ５１は化粧側枠
、（６）は発泡断熱材、（７）は扉内板、ａυは扉内板
本体。 ａりは発泡スチロール等の断熱材である。 代理人　　葛　野　信　− 第１図 ｔｊ５４図 手続補正書（１斃） 昭和５７年６　月７日 特許庁長官殿 １、事件の表示　　　　特願昭ＩＴ−１７００ｓ号２　
発明の名称　　冷薦庫等の断熱扉 ３、補正をする者 事件との関係　　　特許出願人 住　所　　　　　東京都千代田区丸の内二丁目２番３号
名　称（６０１）　　　三菱電機株式会社代表者片山仁
八部 ４、代理人 住　所　　　　　東京都千代田区丸の内二丁目２番３号
補正の対象 （１）　　明細書の特許請求の範囲の欄（２１明細書の
発明の詳細な説明の欄 （３１明細書の図面の簡単な説明の欄 １　補正の内容 （１）明細書の特許請求の範囲を別紙の通り補正するＯ 偉ｉ　明細書中、第３ページ下から６行目の次に「なお
、上記実施例では、扉本体を化粧側枠と外面板を組合せ
る。いわゆるサツシ大扉について述べたが、鋼板管折曲
げて外面板と外枠を一体形成した扉本体においても上記
と同様にヒケが発生するという問題があった。」を挿入
する。 （３）　　同上中、ａＳページ１行目からＳ行目に「扉
内板・・・成形４１＆型内」とあるのを、「扉内板をｎ
Ｊｂ性断熱材の成形機盤内」と訂正する。 同上中、　ｍ３ペ一ジ２０行目から第４べ一行目、およ
びｊｇ５ページ下から５行目にそれ「化粧枠」とあるの
を、「外枠」と訂正する。 特許請求の範囲 扉本体内に発泡断熱材を注入発泡して断熱Ｊｉｉ＆を形
成するものにおいて１食品状納受は等を形成した一円板
、この扉内板に予め発泡性断熱材を一体成形した扉内板
本体、この扉内板本体、■および外面板で囲み形成した
空間に上記発泡断熱材を注入発ｉ’Ｉ！して構成したこ
とを特徴とする冷蔵庫等の断熱扉。Figure 1 is a perspective view of the refrigerator, Figures 2 to 4 show conventional embodiments, and Figures 2 and 3 are exploded perspective views showing partial cross sections with insulation. FIG. 4 is a partially cutaway perspective view of the heat insulating door, FIG. 5 is a partially broken perspective view of the heat insulating door for a refrigerator according to the present invention corresponding to FIG. 4, and FIG. 6 is a perspective view of the present invention. It is an exploded perspective view showing the manufacturing procedure of the heat insulation door by. Note that the same reference numerals in the figures indicate the same or corresponding parts. (2) is the door body, (3) is the outer panel, i51 is the decorative side frame, (6) is the foam insulation material, (7) is the door inner panel, and aυ is the door inner panel body. The material is a heat insulating material such as styrofoam. Agent Makoto Kuzuno - Figure 1 tj54 Procedural amendment (1) June 7, 1980 Mr. Commissioner of the Japan Patent Office 1, Indication of the case Patent application No. 1700s No. 2
Title of the invention Insulated door 3 for cold storage, etc., relationship to the amended case Patent applicant address 2-2-3 Marunouchi, Chiyoda-ku, Tokyo Name (601) Jinhachi Katayama, representative of Mitsubishi Electric Corporation Part 4, Agent address: 2-2-3 Marunouchi, Chiyoda-ku, Tokyo Subject of amendment (1) Claims column of the specification (Detailed description of the invention column of Specification 21 (Detailed description of the invention in Specification 31) Brief Description of Drawings Column 1 Contents of the Amendment (1) The claims of the specification are amended as shown in the attached sheet. In this example, the door body is assembled with a decorative side frame and an outer panel.Although the so-called satsushi large door was described, sink marks occur in the same way as above in the door body where the outer panel and outer frame are integrally formed by bending a steel plate tube. (3) In the above, from the 1st line to the S line of the aS page, the phrase ``Door inner plate...molding 41 & inside the mold'' was replaced with ``Door inner plate...molding 41 & inside the mold.'' n
"Inside the molding machine panel for Jb insulation material" is corrected. In the same as above, in the 20th line to the 4th line of the m3 page, and the 5th line from the bottom of the jg5 page, the ``decorative frame'' is corrected to ``outer frame.'' Claims: In a door body in which a foam insulation material is injected and foamed to form a heat insulation JII&, a circular plate formed with a food-like shape, etc., and a foam insulation material is integrally molded on the inner plate of the door in advance. Inject the foam insulation material into the space formed by the door inner panel body, this door inner panel body, ■, and the outer panel.i'I! An insulating door for a refrigerator, etc., characterized in that it is configured by:

Claims (1)

【特許請求の範囲】[Claims] 扉本体内九発泡断熱材を注入発泡して断熱扉を形成する
ものにおいて９食品収納受は等を形成した扉内板、この
扉内板に予め発泡スチロール等の断熱材を一体成形した
扉内板本体、この扉内板本体、化粧側枠および外面板で
囲み形成した空間に上記発泡断熱材を注入発泡して構成
したこと７ｆｔ特徴とする冷蔵庫扉。In the case where a heat insulating door is formed by injecting and foaming 9-foam heat insulating material into the door body, the door inner plate has 9 food storage receptacles, etc., and the door inner plate has a heat insulating material such as styrofoam pre-molded on this door inner plate. A 7ft refrigerator door characterized in that the foamed heat insulating material is injected and foamed into a space surrounded by the main body, the door inner plate main body, the decorative side frame, and the outer surface plate.