JP5679955B2

JP5679955B2 - Refrigerator drawer door

Info

Publication number: JP5679955B2
Application number: JP2011267480A
Authority: JP
Inventors: 浩樹村上; 川上　俊史; 俊史川上; 宮本　照雄; 照雄宮本; 智史上田
Original assignee: Mitsubishi Electric Corp
Current assignee: Mitsubishi Electric Corp
Priority date: 2011-12-07
Filing date: 2011-12-07
Publication date: 2015-03-04
Anticipated expiration: 2031-12-07
Also published as: JP2013119985A

Description

この発明は、冷蔵庫の引出し扉に関するものである。 The present invention relates to a drawer door of a refrigerator.

家庭用冷蔵庫の扉は、上部の冷蔵室は回転式で、下部の野菜室や冷凍室等の扉は引出し式が一般的である。引出し扉は、扉外周縁部品で上辺及び下辺を仮固定された扉外板と、支持枠取付け用の補強板が予めねじで固定されている扉内板で構成される箱体空間部に発泡断熱材を注入、充填して各部品が固着されたものである。引出し扉の裏面となる扉内板には、食品収納容器を収納載置する全体がコ字状の支持枠が取付けられる。この支持枠に食品が収納された食品収納容器の重量を支える場合、扉内板に支持枠が固定されているだけでは強度が不十分であり、扉内板の強度を補う手段として、扉内板の断熱材側に補強板を使用するのが一般的であった。なお、支持枠は扉内板を介して、複数のねじによって補強板のねじ穴に締付け固定される。
従来の技術として、補強部を設けて強度を高めた補強板を左右対称な形状として、１枚の扉に使用する左右２枚の補強板を共通化し、また、取付け時の方向性もなくすことで、部品点数の削減、組立作業の簡略化を図るようにしたものがある（例えば特許文献１参照）。また、金属あるいは硬質プラスチック製の補強板、取付けブラケット、取付けピースのいずれかを予めブロー成形による扉成形体へインサート物として埋設して一体成形することで、組立時の部品点数の削減及び組立作業の簡略化を図るようにしたものがある（例えば特許文献２参照）。また、発泡断熱材の注入、充填時に扉内板を変形させることで支持枠を固定し、部品点数の削減及び組立作業の簡略化を図るようにしたものがある（例えば特許文献３参照）。 As for the door of a refrigerator for home use, the upper refrigerator compartment is a rotary type, and the lower vegetable room, the freezer compartment door, etc. is a drawer type. The drawer door foams into a box body space consisting of a door outer plate whose upper and lower sides are temporarily fixed by door outer peripheral parts and a door inner plate in which a reinforcing plate for attaching a support frame is fixed in advance with screws. Each component is fixed by injecting and filling a heat insulating material. A generally U-shaped support frame for storing and placing the food storage container is attached to the door inner plate which is the back surface of the drawer door. When supporting the weight of the food storage container in which food is stored in this support frame, the strength is not sufficient if the support frame is fixed to the door inner plate. As a means to supplement the strength of the door inner plate, It was common to use a reinforcing plate on the heat insulating material side of the plate. The support frame is fastened and fixed to the screw hole of the reinforcing plate with a plurality of screws through the door inner plate.
As a conventional technology, a reinforcing plate with increased strength by providing a reinforcing part is made symmetrical, so that the left and right reinforcing plates used for one door are shared, and the directionality at the time of installation is eliminated. Therefore, there is one that reduces the number of parts and simplifies assembly work (see, for example, Patent Document 1). Also, by embedding one of the metal or hard plastic reinforcing plate, mounting bracket, or mounting piece as an insert in a blow-molded door molded body in advance, the number of parts during assembly is reduced and assembly work is performed. (For example, refer to Patent Document 2). In addition, there is a structure in which a support frame is fixed by deforming a door inner plate at the time of injection and filling of a foamed heat insulating material, thereby reducing the number of parts and simplifying assembly work (see, for example, Patent Document 3).

特開２００５−２７３９２２号公報（第４〜５頁、図４〜６）Japanese Patent Laying-Open No. 2005-273922 (pages 4-5, FIGS. 4-6) 特許第３５６５３９８号公報（第３頁、図２〜４）Japanese Patent No. 3565398 (page 3, FIGS. 2 to 4) 特開昭６０−５３７６９号公報（第２頁、図２〜４）JP-A-60-53769 (2nd page, FIGS. 2 to 4)

従来の冷蔵庫の引出し扉は、上記のように構成されているので、補強板の材料費、補強板の金型費、内板に補強板を仮固定するという工程が必要になるという課題があった。また、補強板をインサート物としてブロー成形で一体成形する場合においても、補強板の金型費、ブロー成形にてインサート物を埋設するためのアンダーカット形状及びインサート物が埋設される範囲において成形体の厚み分により断熱材注入空間への突出部分が増え、断熱材の流動を妨げるので密度が不均一となり、強度に関わる材料物性が安定化しない、断熱材の容積を大きくとれないという課題があった。また、発泡断熱材の注入、充填時に扉内板を変形させて支持枠を固定する場合においては、支持枠の固着強度が低い、断熱材発泡時に扉を保持する治具が大型になるという課題があった。 Since the drawer door of the conventional refrigerator is configured as described above, there is a problem that the material cost of the reinforcing plate, the mold cost of the reinforcing plate, and a process of temporarily fixing the reinforcing plate to the inner plate are required. It was. In addition, even when the reinforcing plate is integrally formed by blow molding as an insert, the molded body is within the die cost of the reinforcing plate, the undercut shape for embedding the insert in blow molding, and the range in which the insert is embedded. Due to the thickness of the material, the number of protrusions to the heat-insulating material injection space increases, and the flow of the heat-insulating material is hindered, resulting in non-uniform density. It was. In addition, when fixing the support frame by deforming the door inner plate at the time of filling and filling the foam heat insulating material, the fixing strength of the support frame is low, and the jig for holding the door at the time of foaming the heat insulating material becomes large was there.

本発明は、上記のような従来技術の課題を解消するためになされたものであり、支持枠の取付けに補強板が不要で、発泡断熱材の充填時の問題も招来せず、支持枠の固着強度も確保された冷蔵庫の引出し扉を提供することを目的としている。 The present invention has been made in order to solve the above-described problems of the prior art, and does not require a reinforcing plate for mounting the support frame. It aims at providing the drawer door of the refrigerator with which the adhering strength was ensured.

本発明に係る冷蔵庫の引出し扉は、扉外板に対して発泡断熱材の収容部を介して設けられた扉内板を有する冷蔵庫の引出し扉であって、上記扉内板は、庫内側に出し入れされる食品収納容器保持用の支持枠を固定ねじによって締結し得るねじ受部を、冷蔵庫前方側の上記扉外板方向に凸形状となるように射出成形により一体成形したものであって、上記扉内板の裏面には、上記発泡断熱材を回り込ませることにより上記扉内板と上記発泡断熱材との固着強度を高めるアンダーカット形状の補強部が一体成形されてなるものであり、上記補強部は、上記扉内板の裏面に対して断面がＥ字形状またはコ字形状に突設された板状の突設体からなることを特徴とするものである。
また、本発明に係る冷蔵庫の引出し扉は、扉外板に対して発泡断熱材の収容部を介して設けられた扉内板を有する冷蔵庫の引出し扉であって、上記扉内板は、庫内側に出し入れされる食品収納容器保持用の支持枠を固定ねじによって締結し得るねじ受部を、冷蔵庫前方側の上記扉外板方向に凸形状となるように射出成形により一体成形したしたものであって、上記扉内板の裏面には、上記発泡断熱材を回り込ませることにより上記扉内板と上記発泡断熱材との固着強度を高めるアンダーカット形状の補強部が一体成形されてなるものであり、上記補強部は、上記ねじ受部の突出端部からねじの軸方向に交差する方向に突出された突起からなり、上記ねじ受部と一体に形成されていることを特徴とするものである。 The drawer door of the refrigerator according to the present invention is a drawer door of a refrigerator having a door inner plate provided via a housing portion for foam heat insulating material with respect to the door outer plate, and the door inner plate is located inside the cabinet. A screw receiving portion that can fasten a support frame for holding a food storage container to be taken in and out by a fixing screw is integrally molded by injection molding so as to be convex in the door outer plate direction on the front side of the refrigerator , On the back surface of the door inner plate, an undercut reinforcing portion is integrally formed to increase the fixing strength between the door inner plate and the foam heat insulating material by surrounding the foam heat insulating material. The reinforcing portion is formed of a plate-like protruding body having a cross-section protruding in an E shape or a U shape with respect to the back surface of the door inner plate .
Further, the drawer door of the refrigerator according to the present invention is a drawer door of a refrigerator having a door inner plate provided via a housing portion for foam heat insulating material with respect to the door outer plate, and the door inner plate is a warehouse. The screw receiving part that can fasten the support frame for holding the food storage container to be taken in and out with a fixing screw is integrally formed by injection molding so as to be convex in the door outer plate direction on the front side of the refrigerator. In addition, an undercut reinforcing portion is integrally formed on the back surface of the door inner plate to increase the fixing strength between the door inner plate and the foam heat insulating material by wrapping the foam heat insulating material. The reinforcing portion is formed of a protrusion protruding from a protruding end portion of the screw receiving portion in a direction intersecting the axial direction of the screw, and is formed integrally with the screw receiving portion. is there.

この発明に係る冷蔵庫の引出し扉は、支持枠を扉内板に直接締結し得るようにねじ受部が扉内板と一体に成形されているため、支持枠取付け用の補強板が不要で組立作業を簡略化することができる。また、発泡断熱材を充填する収容部への突出量を抑制できるので発泡断熱材が均一に充填され、ねじ受部も均一に発泡断熱材中に埋設され扉内板と一体化されるので支持枠の固着強度も確保される。そして、扉内板の裏面には、Ｅ字形状またはコ字形状の板状突設体、または、食品容器保持用支持枠の固定ねじに対するねじ受部と一体に形成されねじ受部の突出端部からねじの軸方向に交差する方向に突出された板状の突起からなる、アンダーカット形状の補強部が一体成形されているので、扉内板と発泡断熱材との固着強度を高め、扉組立体の剛性が確保される。

The drawer door of the refrigerator according to the present invention is assembled without the need for a reinforcing plate for attaching the support frame because the screw receiving portion is formed integrally with the door inner plate so that the support frame can be directly fastened to the door inner plate. Work can be simplified. In addition, since the amount of protrusion to the housing part filled with the foam insulation can be suppressed, the foam insulation is uniformly filled, and the screw receiving part is evenly embedded in the foam insulation and integrated with the door inner plate. The fixing strength of the frame is also ensured. The rear surface of the door inner plate is integrally formed with an E-shaped or U-shaped plate-like protruding body or a screw receiving portion for the fixing screw of the food container holding support frame, and the protruding end of the screw receiving portion. Since the undercut-shaped reinforcement part, which consists of plate-like protrusions protruding in the direction crossing the axial direction of the screw from the part, is integrally formed, the fixing strength between the door inner plate and the foam insulation is increased, and the door The rigidity of the assembly is ensured .

本発明の実施の形態１に係る引出し扉をもつ冷蔵庫を概念的に示す正面図。The front view which shows notionally the refrigerator with the drawer door which concerns on Embodiment 1 of this invention. 図１に示された引出し扉の１つを引出した状態を概念的に示す側面図。The side view which shows notionally the state which pulled out one of the drawer doors shown by FIG. 図２に示された引出し扉の背面斜視図。FIG. 3 is a rear perspective view of the drawer door shown in FIG. 2. 図２に示された引出し扉を構成する扉内板の前面斜視図。The front perspective view of the door inner board which comprises the drawer door shown by FIG. 図３に示されたＶ−Ｖ線における矢視断面図。FIG. 4 is a cross-sectional view taken along line VV shown in FIG. 3. 本発明の実施の形態２に係る冷蔵庫の引出し扉の要部断面図。Sectional drawing of the principal part of the drawer door of the refrigerator which concerns on Embodiment 2 of this invention. 本発明の実施の形態３に係る冷蔵庫の引出し扉の扉内板の前面斜視図。The front perspective view of the door inner board of the drawer door of the refrigerator which concerns on Embodiment 3 of this invention.

実施の形態１．
以下、この発明の実施の形態１に係る冷蔵庫の引出し扉について図１〜５を参照して説明する。なお、各図を通じて同一または相当部材（部分）には同一の符号を付すものとする。図１に示すように、冷蔵庫は、冷蔵庫本体１と、この冷蔵庫本体１が区画壁により区画された上部から順に冷蔵室、製氷室及び切替え室、冷凍室、並びに野菜室からなる各貯蔵室を備えている。冷蔵室には回転式の冷蔵室扉２が観音扉式に設けられている。製氷室、切替え室、冷凍室、及び野菜室は何れも引出し式扉３である製氷室扉３Ａ、切替え室扉３Ｂ、冷凍室扉３Ｃ、及び野菜室扉３Ｄがそれぞれの貯蔵室の前面開口部を覆うように設けられている。 Embodiment 1 FIG.
Hereinafter, the drawer door of the refrigerator which concerns on Embodiment 1 of this invention is demonstrated with reference to FIGS. In addition, the same code | symbol shall be attached | subjected to the same or equivalent member (part) through each figure. As shown in FIG. 1, the refrigerator includes a refrigerator body 1 and storage rooms each including a refrigerator room, an ice making room, a switching room, a freezer room, and a vegetable room in order from the upper part where the refrigerator body 1 is partitioned by a partition wall. I have. The refrigerating room is provided with a rotary refrigerating room door 2 in the form of a door. The ice making room, the switching room, the freezing room, and the vegetable room are all drawer-type doors 3A, the ice making room door 3A, the switching room door 3B, the freezing room door 3C, and the vegetable room door 3D. It is provided so as to cover.

次に、引出し扉３の構成を切替え室扉３Ｂの場合について説明する。冷蔵庫本体１の前面開口部から庫内に出し入れ可能に設けられる引出し扉３は、図２、図３に示すように扉外周縁部品３１、扉外板３２、発泡断熱材（図示省略）を隠蔽する扉内板３３からなる扉組立体３０と、扉内板３３の庫内側にねじ４によって固定され庫内方向に突出された金属製の一対の支持枠５と、扉内板３３に取付けられたガスケット３４と、支持枠５に保持され扉体を開閉させることで庫内に出し入れされる上面が開放されたプラスチック製の食品収納容器６と、一対の支持枠５の庫内奥側端部を相互に連結する連結棒５１と、支持枠５に対して回動可能に支持され冷蔵庫本体の庫内側に設けられたレール７内を転動する可動ローラー５２などにより構成されている。 Next, the structure of the drawer door 3 will be described for the switching chamber door 3B. As shown in FIGS. 2 and 3, the drawer door 3 provided so as to be able to be taken in and out of the front opening of the refrigerator body 1 conceals the door outer peripheral part 31, the door outer plate 32, and the foam insulation (not shown). The door assembly 30 includes a door inner plate 33, a pair of metal support frames 5 that are fixed to the inner side of the door inner plate 33 by screws 4 and project inward of the chamber, and the door inner plate 33. The gasket 34, the plastic food storage container 6 that is held by the support frame 5 and opened and closed by opening and closing the door body, and the inner end of the pair of support frames 5 in the interior. Are connected to each other, and a movable roller 52 that is rotatably supported with respect to the support frame 5 and rolls in a rail 7 provided inside the refrigerator main body.

なお、支持枠５は庫内側に設けられた固定ローラー８にも係合され、引出し扉３は冷蔵庫の庫内に対して軽い力で滑らかに出し入れできるように取付けられている。支持枠５は扉内板３３に複数のねじ４で締付け固定され、食品収納容器６が扉組立体３０と一体に移動するように食品収納容器６を扉組立体３０に保持する役目を有している。引出し扉３の扉組立体３０は、扉外周縁部品３１で上辺及び下辺を仮固定した扉外板３２と、扉内板３３とで形成された箱体の空間部からなる収容部Ａ（図５に図示）に発泡断熱材を注入、充填することにより各部品を固着して製作される。 The support frame 5 is also engaged with a fixed roller 8 provided on the inside of the refrigerator, and the drawer door 3 is attached to the inside of the refrigerator so that it can be smoothly put in and out with a light force. The support frame 5 is fastened and fixed to the door inner plate 33 with a plurality of screws 4, and has a function of holding the food container 6 on the door assembly 30 so that the food container 6 moves integrally with the door assembly 30. ing. The door assembly 30 of the drawer door 3 includes a housing portion A (see FIG. 5) that is a box space formed by a door outer plate 32 whose upper and lower sides are temporarily fixed by door outer peripheral parts 31 and a door inner plate 33. Each component is fixedly manufactured by injecting and filling a foam heat insulating material into (shown in FIG. 5).

扉内板３３には、図４、図５に示すように支持枠５を、ねじ４によって締付固定し得る柱状のねじ受部３３１が、扉前方方向に凸形状となるように射出成形によって該扉内板３３と一体に成形されている。ねじ受部３３１の中心部には、ねじ穴３３１ａ（図４では図示省略）が設けられ、その外周部には扉内板３３の支持枠５取付け面の強度を確保するために複数のリブ３３２が扉内板３３の裏面から連なるように設けられている。リブ３３２は、ねじ受部３３１の外周部に等角度で４個設けたものを示したが、これに限らず取付け面の強度を確保できればどの方向に何個設けてもよい。 As shown in FIGS. 4 and 5, the door inner plate 33 is formed by injection molding so that a column-shaped screw receiving portion 331 that can fasten and fix the support frame 5 with the screws 4 is convex in the forward direction of the door. It is molded integrally with the door inner plate 33. A screw hole 331a (not shown in FIG. 4) is provided at the center of the screw receiving portion 331, and a plurality of ribs 332 are provided on the outer peripheral portion of the screw receiving portion 331 in order to ensure the strength of the support frame 5 mounting surface of the door inner plate 33. Are provided so as to continue from the back surface of the door inner plate 33. Although four ribs 332 are provided on the outer peripheral portion of the screw receiving portion 331 at an equal angle, the number of ribs 332 is not limited to this and may be provided in any direction as long as the strength of the mounting surface can be secured.

扉組立体３０は、支持枠５の前端部に設けた穴（図示せず）を介して、複数のねじ４によってねじ受部３３１のねじ穴３３１ａに締付けられる。このとき、扉内板３３と一体成形された樹脂製のねじ受部３３１は、従来の金属製の補強板よりもねじ切り作業が容易であり、支持枠締付け時の作業性を改善することができる。ねじ穴３３１ａはタッピングネジ用の単なる穴でも良い。また、扉内板３３の裏面には、図示されていない発泡断熱材との固着強度確保を目的として、図４、図５に示すように複数のアンダーカット形状の補強部３３３が射出成形により該扉内板３３と一体に設けられている。 The door assembly 30 is fastened to the screw hole 331 a of the screw receiving portion 331 by a plurality of screws 4 through a hole (not shown) provided in the front end portion of the support frame 5. At this time, the resin screw receiving portion 331 integrally formed with the door inner plate 33 is easier to thread than the conventional metal reinforcing plate, and can improve the workability when tightening the support frame. . The screw hole 331a may be a simple hole for a tapping screw. Also, on the back surface of the door inner plate 33, a plurality of undercut reinforcing portions 333 are formed by injection molding as shown in FIGS. 4 and 5 for the purpose of securing the fixing strength with a foam heat insulating material (not shown). It is provided integrally with the door inner plate 33.

補強部３３３は、扉内板３３の裏面に対して断面がＥ字形状（コ字形状やその他の形状でも良い）に突設された板状の突設体からなり、扉内板３３の裏面との間に形成された空間部３３３ａに発泡断熱材が回り込むことにより発泡断熱材の中に埋設され、扉内板３３と発泡断熱材との固着強度を高め、扉組立体３０の剛性が確保される。なお、補強部３３３は扉内板３３の左右に２箇所設けたものを示したが、これに限らず発泡断熱材により埋設可能で固着強度を確保できれば、個数、形状共に種々に変更可能である。また、図の例では補強部３３３を独立して設置した場合を示しているが、例えばねじ受部３３１と一体に設けることもできる。 The reinforcing portion 333 is formed of a plate-like projecting body having a cross-section projecting in an E shape (may be a U shape or other shapes) with respect to the back surface of the door inner plate 33. The foam heat insulating material wraps around the space portion 333a formed between the two and is embedded in the foam heat insulating material, thereby increasing the fixing strength between the door inner plate 33 and the foam heat insulating material, and ensuring the rigidity of the door assembly 30. Is done. In addition, although the reinforcement part 333 showed what was provided in two places on the right and left of the door inner board 33, if it can embed with a foam heat insulating material and can secure fixation strength, both number and shape can be changed variously. . Moreover, although the case where the reinforcement part 333 was installed independently is shown in the example of a figure, it can also be provided integrally with the screw receiving part 331, for example.

上記のように構成された実施の形態１においては、ねじ受部３３１は扉内板３３と一体成形されているため、支持枠５の締付けが必要な部位のみに発泡断熱材を充填するスペースに対する影響の少ない最小限の形状で設けることが可能である。また、リブ３３２や補強部３３３も、必要な部位のみに最小限の形状で設けることが可能である。そのため、発泡断熱材が注入される扉外板３２と扉内板３３により形成される発泡断熱材の収容部Ａへの突出形状を最小限に抑えることができる。 In the first embodiment configured as described above, since the screw receiving portion 331 is integrally formed with the door inner plate 33, only the portion where the support frame 5 needs to be tightened is filled with the foam heat insulating material. It is possible to provide a minimal shape with little influence. Further, the rib 332 and the reinforcing portion 333 can be provided in a minimum shape only in a necessary portion. Therefore, the protrusion shape to the accommodating part A of the foam heat insulating material formed by the door outer plate 32 and the door inner plate 33 into which the foam heat insulating material is injected can be minimized.

一般的に、この収容部Ａへの突出形状は発泡断熱材の流動を妨げる要因となり、流動が妨げられた場合、発泡断熱材の密度が不均一になるため、強度に関わる材料物性が不安定となる。本発明では上記収容部Ａへの突出形状を最小限に抑えられることで、発泡断熱材の密度がより均一化するため、強度に関わる材料物性を安定化させることができる。また、収容部Ａへの突出形状が最小限に抑えられることにより、扉の外形寸法が同じでも断熱材の容積を大きくとることができ、高品質な断熱扉を提供することが可能となる。 In general, the protruding shape into the housing portion A is a factor that hinders the flow of the foam heat insulating material, and when the flow is hindered, the density of the foam heat insulating material becomes non-uniform, so that the material properties related to strength are unstable. It becomes. In this invention, since the density of a foaming heat insulating material becomes more uniform because the protrusion shape to the said accommodating part A can be suppressed to the minimum, the material physical property regarding intensity | strength can be stabilized. Moreover, since the protrusion shape to the accommodating part A is suppressed to a minimum, the volume of the heat insulating material can be increased even if the outer dimensions of the door are the same, and a high quality heat insulating door can be provided.

上記のように、実施の形態１によれば、庫内側に出し入れされる食品収納容器保持用の支持枠５を、扉内板３３に一体に形成されたねじ受部３３３に直接締結し得るように形成されているため、支持枠取付け用補強板を必要とせず、補強板の材料費、補強板の金型費、部品点数を削減し、従来の扉内板に補強板を取付けるという作業を廃止できるため、扉の組立作業も簡略化して安価にすることができる。また、扉内板３３にアンダーカット形状の補強部３３３を射出成形により一体成形したので、発泡断熱材の流動を妨げる収容部Ａへの突出形状が最小限に抑えられることにより、発泡断熱材の密度が均一化され、強度に関わる材料物性を安定化させることができる。 As described above, according to the first embodiment, the support frame 5 for holding the food storage container that is taken in and out of the inside of the cabinet can be directly fastened to the screw receiving portion 333 formed integrally with the door inner plate 33. Therefore, it does not require a reinforcing plate for mounting the support frame, reduces the material cost of the reinforcing plate, the die cost of the reinforcing plate, and the number of parts, and attaches the reinforcing plate to the conventional door inner plate. Since it can be abolished, the door assembly operation can be simplified and made inexpensive. In addition, since the undercut reinforcing portion 333 is integrally formed by injection molding on the door inner plate 33, the protruding shape to the housing portion A that hinders the flow of the foam heat insulating material can be minimized, so that the foam heat insulating material The density is made uniform, and the material physical properties related to strength can be stabilized.

また、該突出形状が最小限に抑えられることにより、外形寸法が同じ扉において断熱材の容積を大きくとることができる。また、小型化にも寄与し得る。また、補強板が不要となるので部品保管スペースの有効利用も可能となる。また、ねじ受部３３３の外周部には、扉内板３３の裏面から連なる補強用のリブ３３２が突設されているので、持枠取付け面の強度が確保され、支持枠５をねじ締結するときの強度が高められる。また、扉内板３３の裏面に一体成形されたアンダーカット形状の補強部３３３は、その空間部３３３ａに発泡断熱材が回り込むことにより扉内板３３と発泡断熱材との固着強度が高められる。また、製造も容易となり、歩留まり向上にも寄与し得る。 Further, since the protruding shape is minimized, the volume of the heat insulating material can be increased in the door having the same external dimension. It can also contribute to miniaturization. Further, since a reinforcing plate is not required, the parts storage space can be effectively used. Further, since a reinforcing rib 332 is provided on the outer peripheral portion of the screw receiving portion 333 so as to extend from the back surface of the door inner plate 33, the strength of the holding frame mounting surface is ensured and the support frame 5 is screwed. When strength is increased. In addition, the undercut-shaped reinforcing portion 333 integrally formed on the back surface of the door inner plate 33 is improved in fixing strength between the door inner plate 33 and the foam heat insulating material as the foam heat insulating material wraps around the space portion 333a. In addition, manufacturing is facilitated, which can contribute to yield improvement.

実施の形態２．
次に、この発明の実施の形態２に係る冷蔵庫の引出し扉について図６を参照して説明する。図６において、ねじ受部３３１の突出端部には、扉外板３２との間の収容部Ａに充填される発泡断熱材に埋設され、扉内板３３との固着強度を高めるためのアンダーカット形状を形成する補強部３３３が一体に設けられている。補強部３３３は、ねじ受部３３１の突出端部からねじ４の軸方向に交差する方向に突出された板状の突起からなる。その他の構成は実施の形態１と同様であるので説明を省略する。 Embodiment 2. FIG.
Next, the drawer door of the refrigerator which concerns on Embodiment 2 of this invention is demonstrated with reference to FIG. In FIG. 6, the projecting end portion of the screw receiving portion 331 is embedded in a foam heat insulating material filled in the accommodating portion A between the door outer plate 32 and an underarm for increasing the fixing strength with the door inner plate 33. A reinforcing portion 333 that forms a cut shape is integrally provided. The reinforcing portion 333 includes a plate-like protrusion that protrudes from the protruding end portion of the screw receiving portion 331 in a direction that intersects the axial direction of the screw 4. Since other configurations are the same as those of the first embodiment, description thereof is omitted.

上記のように構成された実施の形態２においては、実施の形態１と同様の効果が得られる他、ねじ受部３３１がアンダーカット形状の補強部３３３を兼ねる形状として扉内板３３と一体成形されていることで、発泡断熱材の収容部Ａへの突出部分がより抑えられ、発泡断熱材の強度に関わる材料物性をより安定化させ、断熱材の容積をより大きくとることができるという更なる効果が得られる。 In the second embodiment configured as described above, the same effects as in the first embodiment can be obtained, and the screw receiving portion 331 is integrally formed with the door inner plate 33 as a shape that also serves as the undercut reinforcing portion 333. As a result, the protruding portion of the foam heat insulating material into the housing portion A can be further suppressed, the material properties related to the strength of the foam heat insulating material can be further stabilized, and the volume of the heat insulating material can be further increased. The effect becomes.

実施の形態３．
次に、この発明の実施の形態３に係る冷蔵庫の引出し扉について図７を参照して説明する。図において、扉内板３３に対してねじ受部３３１と共に一体成形されたアンダーカット形状の補強部３３３は、扉内板の裏面に対して、射出成形時に弾性変形して抜くことが可能な緩い傾斜または緩く湾曲して突設された、板状の突設体からなっている。なお、図示の例では該板状の突設体の中央部に空間部３３３ａを兼ねる四角形の穴３３３ｂが設けられている。その他の要部構成は実施の形態１と同様であるので説明を省略する。 Embodiment 3 FIG.
Next, the drawer door of the refrigerator which concerns on Embodiment 3 of this invention is demonstrated with reference to FIG. In the figure, the undercut reinforcing portion 333 integrally formed with the screw receiving portion 331 with respect to the door inner plate 33 is loose enough to be elastically deformed and removed from the back surface of the door inner plate at the time of injection molding. It consists of a plate-like projecting body that is slanted or gently curved. In the illustrated example, a square hole 333b that also serves as the space 333a is provided at the center of the plate-like projecting body. Since the other principal part structure is the same as that of Embodiment 1, description is abbreviate | omitted.

上記のように構成された実施の形態３においては、補強部３３３が射出成形時に金型を抜くことが可能なアンダーカット形状となっている。補強部３３３の傾斜または湾曲の角度や方向を扉内板３３との固着強度が高まるように選ぶことで、実施の形態１と同様の効果が得られる他、扉内板３３はスライド機能の無い金型で成形可能のため、金型費を削減することができるという更なる効果が得られる。 In the third embodiment configured as described above, the reinforcing portion 333 has an undercut shape that allows the mold to be removed during injection molding. By selecting the angle or direction of inclination or curvature of the reinforcing portion 333 so that the fixing strength with the door inner plate 33 is increased, the same effect as in the first embodiment can be obtained, and the door inner plate 33 has no sliding function. Since the mold can be molded, a further effect that the mold cost can be reduced is obtained.

なお、引出し扉３の構成を切替え室扉３Ｂの場合について説明したが、他の引出し扉３も同様に構成できる。また、本発明は、その発明の範囲内において、各実施の形態を自由に組み合わせたり、各実施の形態を適宜、変形、省略することが可能である。 In addition, although the structure of the drawer door 3 was demonstrated about the case of the switching chamber door 3B, the other drawer door 3 can also be comprised similarly. Further, within the scope of the invention, the present invention can be freely combined with each other, or can be appropriately modified or omitted.

１冷蔵庫本体、３引出し扉、３Ａ製氷室扉、３Ｂ切替え室扉、３Ｃ冷凍室扉、３Ｄ野菜室扉、３０扉組立体、３１扉外周縁部品、３２扉外板、３３扉内板、３３１ねじ受部、３３１ａねじ穴、３３２リブ、３３３補強部、３３３ａ空間部、３３３ｂ穴、４ねじ、５支持枠、５１連結棒、５２可動ローラー、６食品収納容器、７レール、８固定ローラー、Ａ収容部。 DESCRIPTION OF SYMBOLS 1 Refrigerator main body, 3 Drawer door, 3A Ice making room door, 3B Switching room door, 3C Freezing room door, 3D Vegetable room door, 30 Door assembly, 31 Door outer peripheral part, 32 Door outer plate, 33 Door inner plate, 331 Screw receiving part, 331a Screw hole, 332 Rib, 333 Reinforcement part, 333a Space part, 333b Hole, 4 Screw, 5 Support frame, 51 Connecting rod, 52 Movable roller, 6 Food storage container, 7 Rail, 8 Fixed roller, A Containment section.

Claims

扉外板に対して発泡断熱材の収容部を介して設けられた扉内板を有する冷蔵庫の引出し扉であって、上記扉内板は、庫内側に出し入れされる食品収納容器保持用の支持枠を固定ねじによって締結し得るねじ受部を、冷蔵庫前方側の上記扉外板方向に凸形状となるように射出成形により一体成形したものであって、上記扉内板の裏面には、上記発泡断熱材を回り込ませることにより上記扉内板と上記発泡断熱材との固着強度を高めるアンダーカット形状の補強部が一体成形されてなるものであり、上記補強部は、上記扉内板の裏面に対して断面がＥ字形状またはコ字形状に突設された板状の突設体からなることを特徴とする冷蔵庫の引出し扉。 It is a drawer door of a refrigerator having a door inner plate provided to the door outer plate through a storage portion of foam heat insulating material, and the door inner plate is a support for holding a food storage container that is taken in and out of the inside of the warehouse. A screw receiving portion that can be fastened with a fixing screw is integrally formed by injection molding so as to be convex in the door outer plate direction on the front side of the refrigerator, and on the back surface of the door inner plate, An undercut reinforcing portion is integrally formed to increase the fixing strength between the door inner plate and the foam heat insulating material by surrounding the foam heat insulating material, and the reinforcing portion is a back surface of the door inner plate. A refrigerator drawer door characterized by comprising a plate-like projecting body with a cross section projecting in an E shape or a U shape .

扉外板に対して発泡断熱材の収容部を介して設けられた扉内板を有する冷蔵庫の引出し扉であって、上記扉内板は、庫内側に出し入れされる食品収納容器保持用の支持枠を固定ねじによって締結し得るねじ受部を、冷蔵庫前方側の上記扉外板方向に凸形状となるように射出成形により一体成形したものであって、上記扉内板の裏面には、上記発泡断熱材を回り込ませることにより上記扉内板と上記発泡断熱材との固着強度を高めるアンダーカット形状の補強部が一体成形されてなるものであり、上記補強部は、上記ねじ受部の突出端部からねじの軸方向に交差する方向に突出された突起からなり、上記ねじ受部と一体に形成されていることを特徴とする冷蔵庫の引出し扉。 It is a drawer door of a refrigerator having a door inner plate provided to the door outer plate through a storage portion of foam heat insulating material, and the door inner plate is a support for holding a food storage container that is taken in and out of the inside of the warehouse. A screw receiving portion that can be fastened with a fixing screw is integrally formed by injection molding so as to be convex in the door outer plate direction on the front side of the refrigerator, and on the back surface of the door inner plate, An undercut-shaped reinforcing part is integrally formed to increase the fixing strength between the door inner plate and the foamed heat insulating material by surrounding the foamed heat insulating material, and the reinforcing part protrudes from the screw receiving part. A drawer door for a refrigerator, comprising a protrusion protruding from an end portion in a direction intersecting with the axial direction of the screw, and formed integrally with the screw receiving portion .

上記ねじ受部の外周部には、上記扉内板の裏面から連なる補強用のリブが突設されていることを特徴とする請求項１または請求項２記載の冷蔵庫の引出し扉。 The drawer door for a refrigerator according to claim 1 or 2, wherein a reinforcing rib is provided on an outer peripheral portion of the screw receiving portion so as to project from a back surface of the door inner plate.

上記ねじ受部の中心部には庫内側から形成されたねじ穴または穴が設けられていることを特徴とする請求項１または請求項２記載の冷蔵庫の引出し扉。 The drawer door of the refrigerator according to claim 1 or 2, wherein a screw hole or a hole formed from the inner side is provided in a central portion of the screw receiving portion.