JP2016169928A - Heat insulation door of refrigerator and manufacturing method of the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate some problems that a hand hook part is deformed by foaming pressure caused when a foam heat insulation material is filled and a certain recess is generated at an outer plate as a design surface due to hardening and shrinkage of the foam heat insulation material.SOLUTION: This invention relates to a heat insulation door of a refrigerator in which a foam heat insulation material 4 is filled between an outer plate 11 and an inner plate 2, and a hand hook part A is arranged at one side around the outer plate. The hand hook part is made by a member different from a member of the outer plate, this different member constitutes an end surface member 12 for connecting the outer plate with the inner plate at an end surface part of the heat insulation door corresponding to the one side. The hand hook part has a hand hook part surface portion 12a connecting with an end of the outer plate constituting the one side, and further comprises a hand hook part salient portion A1 formed by being bent from an end of the hand hook part surface portion toward the inner plate, and further bent at a central part of the end surface part in its thickness direction, toward the rear surface of the hand hook part surface portion, and a hand hook part recess portion A2 formed at the rear surface side of the hand hook part salient portion, into which a user's fingers can be inserted.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a heat insulating door of a refrigerator that is filled with a foam heat insulating material and includes a handle for opening and closing operation, and a method for manufacturing the same.

  Insulated doors in refrigerators filled with foam insulation can be opened and closed from any position, regardless of height, and to enhance design with a refreshing and smart design The front panel of the door is formed by bending one steel plate into a substantially U-shape and joining the ends of the opposite sides, and the outer panel is formed with a handle on the periphery. There are some which are partitioned into plates (see, for example, Patent Document 1).

Japanese Patent No. 5178208

  As described above, the outer plate of the door is formed by bending one steel plate into a substantially U shape and joining the ends of the opposite sides, and a front outer plate having a handle portion around the periphery. In the heat insulating door of the refrigerator provided with a handle portion partitioned from the rear outer plate, the handle portion is deformed by the foaming pressure when filling the inside with the foam heat insulating material, and the handle portion after the foaming is finished Due to the curing shrinkage of this resin, there was a problem that the front outer plate, which is the design surface, was dented and the designability was impaired.

  The present invention has been made to solve the above-mentioned problems, and a heat insulating door for a refrigerator that does not cause deformation that impairs the design of the outer plate due to the foaming pressure of the foam heat insulating material, and its manufacture It aims to provide a method.

A heat insulating door of the refrigerator according to the present invention, an outer plate disposed on the outer side of the refrigerator and an outer surface forming a design surface, an inner plate disposed on the inner side of the refrigerator and opposed to the outer plate with a predetermined gap, A heat insulating door for a refrigerator provided with a foam heat insulating material filled between the outer plate and the inner plate, and having an opening / closing handle on at least one predetermined side in the peripheral portion of the outer plate And the said handle part is formed using a member different from the said outer plate, and the other member connects the said outer plate and the said inner plate in the end surface part of the said heat insulation door corresponding to the said 1 side part. And the handle portion has a handle portion surface portion connected to the end of the outer plate forming the one side portion, and is folded in the direction of the inner plate from the end portion of the handle portion surface portion. Bent and further bent to the back side of the surface portion of the handle portion at the central portion in the thickness direction of the end surface portion A finger receiving portion convex portion formed by, is formed on the rear side of the finger receiving portion projecting portions, and is characterized in that it is constituted by a finger receiving portion recess capable of inserting a hand.
The method for manufacturing a heat insulating door for a refrigerator according to the present invention includes an outer plate disposed on the outer side of the refrigerator and having an outer surface forming a design surface, and is disposed on the inner side of the refrigerator and facing the outer plate with a predetermined gap. And a foam heat insulating material filled between the outer plate and the inner plate, and an opening / closing handle portion is provided on at least one predetermined side of the peripheral portion of the outer plate. When a heat insulating door for a refrigerator is manufactured, using a mold having an upper mold and a lower mold, the foamed heat insulating material injected into the heat insulating door is foamed and integrally molded by the foaming pressure. It is a method, Comprising: The said handle part uses a different member from the said outer plate, The other member is an end surface which connects the said outer plate and the said inner plate in the end surface part of the said heat insulation door corresponding to the said 1 side part. Constituting a member, and the handle is connected to an end of the outer plate constituting the one side. A hook portion surface portion, bent from the end portion of the handle portion surface portion toward the inner plate, and further folded to the back side of the handle portion surface portion at the center portion in the thickness direction of the end face portion. It is comprised by the handle part convex part formed by bending, and the handle part recessed part formed in the back side of the said handle part convex part and which can insert a hand tip, It is characterized by the above-mentioned.

In the heat insulating door of the refrigerator according to the present invention, the handle portion surface portion that is continuous with the end of the outer plate, the handle portion convex portion, and the handle portion having the handle portion concave portion are formed using a member different from the outer plate. Therefore, even when the handle portion is deformed during the foaming process of the foam insulation, the outer plate is not deformed, so that the appearance and shape of the design surface are maintained at a predetermined level, and the quality is stabilized. Is obtained.
Moreover, in the manufacturing method of the heat insulation door of the refrigerator which concerns on this invention, the handle part surface part which continues to the edge of an outer plate, a handle part convex part, and the handle part which has a handle part recessed part are used separately from an outer plate. By forming it, even if the handle part is deformed during the foaming process of the foam insulation, the outer plate is not deformed and the appearance and shape of the design surface are maintained at a predetermined level. , The quality is stable and the yield is improved.

It is an external view which shows typically the heat insulation door of the refrigerator by Embodiment 1 of this invention. It is a front view of the heat insulation door shown in FIG. It is a figure which shows typically the cross-sectional structure in the III-III line of FIG. It is a reference figure showing typically the section structure of the heat insulation door of the conventional refrigerator. FIG. 5 is a reference cross-sectional view illustrating a state where a door is installed between an upper mold and a lower mold when a foam heat insulating material is injected in the manufacturing process of the heat insulating door of FIG. 4. FIG. 6 is a reference diagram for explaining a phenomenon in which the handle portion is deformed by the foaming pressure after the foam heat insulating material is injected in FIG. 5 and the front outer plate as the design surface is deformed in the mold. FIG. 7 is a reference diagram for explaining an event in which the design surface is recessed by a force that causes the deformed handle portion to return to the original state due to curing shrinkage of the foamed resin when the molded product is removed from the mold after the step of FIG. 6. It is sectional drawing which shows the state which installed the door between the upper mold | type and the lower mold | type, when inject | pouring a foam heat insulating material in the manufacturing process of the heat insulation door of FIG. 1 by Embodiment 1 of this invention. FIG. 9 is a cross-sectional view for explaining an event in which the handle portion is deformed in the mold by the foaming pressure after the foam insulation material is injected in FIG. 8. FIG. 7 is a cross-sectional view illustrating that when the molded product is removed from the mold after the step of FIG. 6, the design surface does not dent even when the deformed handle portion returns to the original position due to curing shrinkage of the foamed resin. It is sectional drawing which shows typically the heat insulation door of the refrigerator by Embodiment 2 of this invention. It is sectional drawing which shows typically the heat insulation door of the refrigerator by Embodiment 3 of this invention. It is sectional drawing which shows typically the heat insulation door of the refrigerator by Embodiment 4 of this invention. It is sectional drawing which shows the block material for the deformation | transformation prevention of the handle part by the foaming pressure used in the manufacturing method of the heat insulation door of the refrigerator by Embodiment 5 of this invention, and its mounting position. It is sectional drawing which shows typically the state which installed the block material shown in FIG. 14 between an upper mold | type and a lower mold | type with a door, and was made to foam after injection | pouring of a foam heat insulation material. It is sectional drawing which shows the block material by the modification of the block material shown in FIG. 14, and its mounting position. It is sectional drawing which shows the block material by the other modification of the block material shown in FIG. 14, and its mounting position.

Embodiment 1 FIG.
1 is an external view schematically showing a heat insulating door of a refrigerator according to Embodiment 1 of the present invention, FIG. 2 is a front view of the heat insulating door shown in FIG. 1, and FIG. 3 is a sectional structure taken along line III-III in FIG. It is a figure shown typically. 4 to 7 are reference views shown for comparison, FIG. 4 is a reference view schematically showing a cross-sectional structure of a heat insulating door of a conventional refrigerator, and FIG. 5 is a manufacturing process of the heat insulating door of FIG. FIG. 6 is a reference cross-sectional view showing a state where a door is installed between the upper mold and the lower mold when injecting the foam insulation material. FIG. 6 shows that the handle portion is deformed by the foaming pressure after the injection of the foam insulation material in FIG. A reference diagram for explaining the phenomenon that the front outer plate, which is the design surface, is deformed in the mold, and FIG. 7 shows that the deformed handle foams when the molded product is removed from the mold after the step of FIG. It is a reference figure explaining the phenomenon in which a design surface is dented with the force which returns by the hardening shrinkage | contraction of resin. And FIG. 8 is a cross-sectional view showing a state in which the door is installed between the upper mold and the lower mold when injecting the foam heat insulating material in the manufacturing process of the heat insulating door of FIG. 1 according to Embodiment 1 of the present invention, FIG. 9 is a cross-sectional view for explaining an event in which the handle portion is deformed in the mold by the foaming pressure after injection of the foam heat insulating material in FIG. 8, and FIG. 10 is a view when the molding is removed from the mold after the process of FIG. It is sectional drawing showing that a design surface does not dent even if a deformed handle part returns to the original position by hardening shrinkage of foamed resin. In each embodiment, the same or equivalent members and parts will be described with the same reference numerals.

  As shown in FIGS. 1 to 3, the heat insulating door of the refrigerator according to the first embodiment is described as an example in which the door is opened and closed by a hinge at an opening such as a refrigerator compartment or a freezer compartment. An outer plate 11 that is disposed on the outer side and has an outer surface viewed from the front side forming a design surface; an inner plate 2 that is disposed on the inner side of the outer plate 11 and faces the outer plate 11 with a predetermined gap; At least one predetermined side portion in the peripheral portion, in this example, is provided on the left side portion in the figure, and forms a handle A when opening and closing the door, and the outer plate 11 and the inner plate 2 are arranged on the left side portion in the figure. A pair of caps 3 connected to the end plate member 12, the outer plate 11, the inner plate 2, and the end plate member 12 installed at the upper end and the lower end in FIG. 11, end face member 12, inner plate 2, and pair of caps 3. Is constituted by a foam insulation 4 are integrated whole is filled in the internal space of the thermal insulation door. It should be noted that, for example, shelves, shelf receivers, fixing portions, and the like that are mounted or formed on the inner plate 2 as necessary are not shown.

  As shown schematically in FIG. 3, the end face member 12 is formed by sequentially bending the same steel plate as the outer plate 11 so as to form a handle A between the connecting portion for the outer plate 11 and the connecting portion for the inner plate 2. It is configured. The handle portion A includes a handle portion surface portion 12a formed so as to be continuously connected to the design surface of the outer plate main portion 11b at the same surface position as the end surface 11a in one side portion of the outer plate 11, and the handle portion. The handle portion formed by bending from the end portion of the surface portion 12a toward the inner plate 2 and further bending to the back side of the handle portion surface portion 12a at the center portion in the thickness direction of the end face portion. It is formed on the back side of the convex portion A1 and the handle portion convex portion A1, and is configured by a groove-shaped hand portion concave portion A2 that is continuously continuous from the upper end portion to the lower end portion with a dimension that allows insertion of a hand when the door is opened. ing. The recess side wall 12d on the inner plate 2 side forming the handle portion recess A2 is opposed to the inner plate 2 via a handle portion heat insulating portion B having a predetermined distance for heat insulation with the inner plate 2. Has been. In addition, the dimension of the thickness direction of the door in the handle part heat insulation part B is formed larger than the dimension of the thickness direction of the door in the convex part inner part C formed in the handle part convex part A1.

  The outer plate 11 is formed by bending a steel plate into a substantially L shape with a press brake or the like, and the side opposite to the end surface 11a on the one side is bent in the thickness direction of the door as shown in FIG. The outer plate end surface portion 11 c is configured, and the tip portion thereof is further bent in a direction parallel to the inner plate 2 and connected to the inner plate 2. Since the outer surface of the outer plate 11 is a design surface, various coatings may be applied to the surface. Further, the end face member 12 constitutes the left end side of the outer plate 11 in the drawing, and the handle surface portion 12a, the handle projection A1, and the groove-like handle are obtained by bending the steel plate at a predetermined location by a press brake or the like. The handle A is provided by forming the partial recess A2. It is desirable that the thickness (the vertical dimension in FIG. 3) of the handle projection A1 is about 10 to 30 mm so that a person can grasp it. Further, the groove-shaped handle portion concave portion A2 needs to have a gap dimension of at least about 20 mm because the fingertip of the operator's hand needs to be sufficiently inserted.

  In addition, although the dimension of the left-right direction in the figure of the handle part surface part 12a is formed so that it may become smaller than the width | variety of the recessed part side wall 12d by the side of the inner plate 2 which forms the handle part recessed part A2, for example, it is the same width It is good. Further, the outer plate 11 and the end face member 12 may have different colors and patterns. The handle surface portion 12a constitutes an end portion of the design portion on one side of the outer plate main portion 11b. The cap 3 is manufactured by resin molding. In particular, for heat insulating doors of refrigerators, for example, inexpensive and rigid PPS (polyphenylene sulfide) resin is generally used. Note that a groove for fitting the end portions of the outer plate 11 and the inner plate 2 is provided in the peripheral portion of the cap 3 (not shown). Further, the inner plate 2 is molded using a resin material such as a general ABS resin by vacuum molding. Furthermore, since each figure is shown on an arbitrary scale, the dimensions and shapes including the intervals and gaps between the members and parts are different from the actual ones. In addition, it goes without saying that various modifications and changes such as making the corners of the handle portion curved are possible within the scope of the present invention.

  In contrast to the above-described first embodiment, as shown in the reference diagram of FIG. 4, the heat insulating door of the conventional example shown in Patent Document 1 has a handle portion A on one side of the outer plate 11 and an outer plate main portion 11 b. The handle portion convex portion A1 constituting the handle portion A is formed integrally with one side portion side of the outer plate main portion 11b, and the entire front side forms a design surface. ing. And the groove-shaped hand part recessed part A2 for inserting a hand when opening a door located behind the hand part convex part A1 is formed using the rear outer plate 13 different from the outer plate 11. Has been. The rear outer plate 13 is formed with a concave side wall 13d corresponding to the concave side wall 12d in FIG.

  In the heat insulating door as shown in FIG. 4, when the foamed heat insulating material (not shown) that is a raw material of the foam heat insulating material 4 is injected into the internal space of the door and then foamed, the deformation of the outer plate 11 and the outer plate 11 In order to suppress the leakage of the foam heat insulating material 4 at the connection portion between the upper plate 51 and the inner plate 2, the outer plate 11 and the inner plate 2 are pressed by the upper mold 51 and the lower mold 52 as shown in FIG. When foaming starts after injecting the foam insulation material, as shown in FIG. 6, the recess side wall 13 d rises due to the foaming pressure in the direction indicated by the arrow D, and by the rise, the handle portion convex portion connected to the rear outer plate 13. A force in a direction indicated by an arrow E acts on A1, and the handle portion convex portion A1 is pulled toward the inner plate 2 side. After a few minutes, the foam heat insulating material 4 is cured, and when the upper mold 51 and the lower mold 52 are removed, the foaming pressure has already decreased, and the concave side wall 13d has been raised by the curing shrinkage of the foam heat insulating material 4. The power is reduced. Accordingly, as shown in FIG. 7, the force that the handle portion convex portion A <b> 1 that has been pulled to the inner plate 2 side returns to the original position works as indicated by an arrow F. At that time, a dent as shown in a circle G indicated by a broken line in FIG. 7 is generated at the base portion of the handle portion convex portion A1, causing a problem of deteriorating the appearance.

  On the other hand, in the heat insulation door of Embodiment 1 of the present invention, when the foam heat insulating material is injected and foamed, as in the case of the conventional example, as shown in FIG. In order to suppress leakage of the foam insulation 4 at the connecting portion between the plate 11 and the inner plate 2, the member assembled with the outer plate 11 and the inner plate 2 is pressed with a mold using the upper mold 51 and the lower mold 52. To do. Specifically, after the caps 3 are attached to both sides of the outer plate 11 and the end face member 12 and assembled into a box shape, a predetermined amount of foam insulation material (not shown) that is a raw material of the foam insulation material 4 is injected. After the inner plate 2 is assembled by the inner plate 2 so as to cover the opening of the box-shaped assembly comprising the outer plate 11, the end surface member 12, and the pair of caps 3, the upper die 51 and the lower die 52 are assembled. Set in a type consisting of Note that, for example, as shown in FIG. 8, an adhesive tape 14 may be attached in advance to the connecting portion between the outer plate 11 and the end face member 12 and fixed. Moreover, since the time until foaming becomes active after the injection of the foam heat insulating material is as short as, for example, several minutes, it is the same as in the prior art to advance the process within that time.

In addition, after injection of the foam insulation material, as shown in FIG. 9, the recess side wall 12 d rises due to the foaming pressure D, and the handle portion projection A <b> 1 constituting the handle portion A by the rise is the direction indicated by the arrow E on the inner plate 2 side. However, in the first embodiment, since the handle portion A and the outer plate main portion 11b constituting the design surface are formed by separate members, the design is separated. Stress due to the deformation of the handle portion A with respect to the outer plate main portion 11b constituting the surface is not propagated, and the deformation of the outer plate main portion 11b is suppressed. When the outer plate 11 and the end face member 12 are connected by the adhesive tape 14 (not shown in FIGS. 9 and 10), the influence of the deformation of the handle portion A is suppressed by the elasticity of the adhesive tape 14. For this reason, when the mold is removed from the mold after molding, a force is exerted to return the handle projection A1 to the original position as indicated by an arrow F. However, this is caused by the deformation of the handle A that has occurred in the conventional example. The dent shown in FIG. 7 does not occur in the broken circle G as shown in FIG.
In addition, in order to further improve the heat insulating property of the heat insulating door, for example, the surface of the inner plate 2 on the side facing the foam heat insulating material 4 or the recessed portion in which the thickness of the foam heat insulating material 4 in the end face member 12 is thinner than the others A known sheet-like vacuum heat insulating material having a very high heat insulating property may be attached to the inner surface of the handle heat insulating portion B (see FIG. 3) extending from the side wall 12d to the inner plate 2 connecting portion.

  As described above, the heat insulating door of the refrigerator according to the first embodiment is filled with the foam heat insulating material 4 between the outer plate 11 and the inner plate 2, and the handle portion A is provided on one side of the peripheral portion of the outer plate 11. In the heat insulating door of the provided refrigerator, the handle portion A uses a member different from the outer plate 11, and the other member is the outer plate 11 and the inner plate 2 at the end surface portion of the heat insulating door corresponding to the one side portion. The handle portion A has a handle portion surface portion 12a continuous with the end portion of the outer plate 11 constituting the one side portion, and the inner portion extends from the end portion of the handle portion surface portion. A handle projection A1 formed by bending further toward the back side of the handle surface portion 12a at the center in the thickness direction of the end face portion, and a handle projection A1. And a handle portion recessed portion A2 into which the hand can be inserted. According to the configuration, even when the handle portion A is deformed during the manufacturing process, the outer plate 11 constituting the design surface is not affected by the formation of the concave portion. The shape is always maintained at a desired level, and the design can be obtained without impairing the design. Thus, a refreshing and smart insulation door can be obtained, and a remarkable effect that the quality is stabilized is obtained.

  Moreover, the manufacturing method of the heat insulation door of the refrigerator by Embodiment 1 is the outer plate | board 11 arrange | positioned on the outer side of the store | warehouse | chamber, the inner plate 2 arrange | positioned on the inner side of the store | warehouse, and opposed to the outer plate, When manufacturing a heat insulating door of a refrigerator provided with a foam heat insulating material 4 filled between the plates 2 and having a handle A for opening and closing on one side of the outer plate, A method including a step of forming by a foaming pressure of a foam heat insulating material injected into an internal space of a heat insulating door using a mold having a mold 52, wherein the handle A uses a member different from the outer plate 11, and The separate member constitutes an end face member 12 connecting the outer plate 11 and the inner plate 2 at the end face portion of the heat insulating door corresponding to the one side portion, and the handle portion A is an outer portion constituting the one side portion. It has a handle portion surface portion 12a continuous with the end surface 11a of the plate 11, and the inner plate 2 is directed from the end portion of the handle portion surface portion 12a. Is bent at the center in the thickness direction of the end face portion, and is further bent on the back side of the handle surface portion 12a, and on the back side of the handle portion protrusion A1. It is a method characterized in that it is constituted by the formed handle portion recess A2 into which the hand can be inserted.

  In the manufacturing method of the heat insulating door of the refrigerator according to the first embodiment as described above, the handle A is deformed in the manufacturing process by forming the handle A using a member different from the outer plate 11. Even in this case, since the outer plate 11 constituting the design surface of the product to be obtained is not deformed like a concave portion, the appearance and shape of the design surface are always maintained at the intended level, and the quality is stable. The door can be manufactured, and a remarkable effect that the yield is improved is obtained.

Embodiment 2. FIG.
FIG. 11: is sectional drawing which shows typically the heat insulation door of the refrigerator by Embodiment 2 of this invention. In the figure, the end of the outer plate 11 on the handle A side (left side in the figure) is bent toward the inner plate 2, and the end is bent by hemming to form a groove-shaped recess 11d. . A bent piece 12e formed by bending the right end portion of the handle portion surface portion 12a to the inner plate 2 side is provided at a connection portion between the end surface member 12 and the outer plate 11, and the folding portion 12e is formed. The curved piece 12e is inserted into the groove-like recess 11d of the outer plate 11 with a predetermined clearance, and the outer plate 11 and the end surface member 12 are connected to each other. The clearance is preferably about 0.5 mm to 1 mm, and the insertion allowance is preferably 5 mm or more. If the clearance is 0.5 mm or less, the deformation of the handle A due to the foaming pressure affects the outer plate main portion 11b constituting the design surface. Further, a sealing material such as hot melt or silicon resin that has a longer curing time than the foamed heat insulating material 4 or does not cure may be applied to the clearance portion. Other configurations are the same as those of the first embodiment.

  In Embodiment 2 configured as described above, the connection portion between the one side portion of the outer plate and the surface portion of the handle portion of the separate member is either the outer plate or the separate member. A groove-like recess formed by hemming bending at the end of the groove and a bent piece 12e formed at the end of the other member and inserted into the groove-like recess with a predetermined clearance. Thus, the foamed heat insulating material 4 does not leak to the outside at the joint between the outer plate 11 and the end face member 12 when the foamed heat insulating material is filled, and the design feeling of the outer plate main part 11b constituting the design surface is not impaired. And you can get a smart insulation door.

Embodiment 3 FIG.
FIG. 12 is a sectional view schematically showing a heat insulating door of the refrigerator according to the third embodiment of the present invention. In the figure, the convex portion inner portion C (see FIG. 3), which is the internal space of the handle portion convex portion A1 constituting the handle portion A of the end face member 12, is formed to have substantially the same size as the convex portion inner portion C. The block-shaped filling member 61 thus prepared is preloaded before the foam heat insulating material is injected. The material of the block-shaped filling member 61 is not particularly limited as long as it is hard enough not to be deformed by the foaming pressure when the foam heat insulating material is formed by foaming. A resin having a thermal conductivity lower than that of metal, for example, a cured product of foam heat insulating material or polystyrene foam is desirable. Other configurations are the same as those in the first or second embodiment.

  In the third embodiment configured as described above, the block-shaped filling member 61 loaded in advance in the convex portion inner portion C, which is the internal space of the handle portion convex portion A1, is the handle of the foam heat insulating material 4 in the foaming process. Since the inflow to the inside of the convex portion A1 is prevented, the rigidity of the handle portion A is increased, and the force for raising the concave side wall 12d on the inner plate 2 side forming the handle portion concave portion A2 by the foaming pressure of the foam heat insulating material 4 Therefore, the influence on the outer plate main portion 11b forming the design surface can be further reduced. Moreover, a clean and smart door can be obtained without impairing the design of not only the outer plate main portion 11b but also the handle portion A.

Embodiment 4 FIG.
FIG. 13: is sectional drawing which shows typically the heat insulation door of the refrigerator by Embodiment 4 of this invention. In the drawing, the handle portion heat insulating portion B (see FIG. 3) is provided in the handle heat insulating portion B (see FIG. 3) which is a gap with the inner plate 2 on the back side of the recess side wall 12d in which the handle portion concave portion A2 is formed by the end face member 12. The block-shaped filling member 62 formed at substantially the same height as the above is preloaded before injecting the foam insulation material. The material of the block-shaped filling member 62 is not particularly limited as long as it is hard enough not to be deformed by the foaming pressure when the foam heat insulating material 4 is formed by foaming. Then, a resin having a thermal conductivity lower than that of a metal, for example, a cured product of foamed heat insulating material or expanded polystyrene is desirable. Other configurations are the same as those in the first to third embodiments.

  In the fourth embodiment configured as described above, the block-shaped filling member 62 prevents the foam heat insulating material 4 from flowing into the handle portion heat insulating portion B in the foaming process. Since the rising of the recessed side wall 12d formed can be suppressed, the deformation of the handle portion A is suppressed, and the influence on the outer plate main portion 11b which is the design surface can be further reduced. In addition, a door with a refreshing feeling and smartness can be obtained without impairing the design of the handle portion A as well as the outer plate main portion 11b which is the design surface.

Embodiment 5 FIG.
14 is a cross-sectional view showing a block material for preventing deformation of a handle portion caused by foaming pressure used in the method for manufacturing a heat insulating door of a refrigerator according to Embodiment 5 of the present invention, and FIG. 15 is a cross-sectional view showing the mounting position thereof. It is sectional drawing which shows typically the state which installed between the upper mold | type and the lower mold | type with the door, and was made to foam after injection | pouring of a foam heat insulation material. In addition, as shown in FIGS. 14 and 15, the fifth embodiment is provided with a deformation prevention prepared in advance when integrally molded by the foaming pressure of the foam insulation material in the upper mold 51 and the lower mold 52. The block material 7 for use is inserted into the handle portion concave portion A2 formed on the back side of the handle portion convex portion A1.

  The block material 7 is manufactured in accordance with the shape of the groove-shaped handle portion concave portion A2, and the left end side of the figure is formed to protrude outward from the end portion of the end face member 12, and the upper die 51 is protruded therefrom. Shaped to accept the part. The material of the block material 7 can be used without particular limitation as long as it is hard enough not to be deformed by the foaming pressure. However, when the block material 7 is inserted into or removed from the handle portion recess A2. Therefore, it is preferable to use a material with a low specific gravity. For example, a resin material is preferable, and aluminum is preferable for a metal. Other configurations are the same as those of the first embodiment.

In the fifth embodiment configured as described above, the foam insulating material is injected as in the first embodiment, and the door with the inner plate 2 assembled is installed in the mold, and the upper mold 51 and the lower mold 52 are arranged. The upper mold 51 is sized so as to hit the block material 7 when the is closed. The foaming pressure of the foam heat insulating material 4 exerts a force that pushes the concave side wall 12d upward in the figure, but the concave side wall 12d is pressed by the upper mold 51 through the block material 7, so that the foaming pressure is absorbed. Therefore, the deformation of the recess side wall 12d is suppressed, and the deformation of the handle portion A can be further suppressed. Therefore, it is possible to prevent the influence on the outer plate main part 11b constituting the design surface. Furthermore, a clean and smart door can be obtained without impairing the design of the handle portion A as well as the design surface.
In the figure, the block member 7 is formed in a substantially rectangular parallelepiped shape, but the present invention is not limited to this.

  16 is a cross-sectional view showing a block material according to a modification of the block material shown in FIG. 14 and its mounting position, and FIG. 17 is a cross-sectional view showing a block material according to another modification of the block material shown in FIG. is there. Since the block material 7 only needs to suppress the bulge of the recess side wall 12d, for example, the upper surface on the distal end side in the insertion direction with respect to the handle portion recess A2 is formed by a rounded curve like the block material 7A shown in the modification of FIG. However, if the top surface on the tip end side in the insertion direction is a tapered straight line as in the block material 7B shown in another modification of FIG. 17, the block materials 7A and 7B can be easily removed after the foam heat insulating material 4 is injected. The insertion and removal can be facilitated.

  It should be noted that within the scope of the present invention, a part or all of each embodiment can be freely combined, or each embodiment can be appropriately modified or omitted. For example, in each of the embodiments, the example has been described in which the handle A is installed on the left side of FIG. 2, but the handle A is installed on the right side according to the opening / closing direction of the heat insulating door, or installed on each of the left and right sides. May be. In addition, when applied to a drawer-type opening / closing door, the handle A can be installed on the upper side of the door as viewed from the front.

  DESCRIPTION OF SYMBOLS 11 Outer plate, 11a End surface, 11b Outer plate main part, 11c Outer plate end surface part, 11d Groove-shaped recessed part, 12 End surface member, 12a Hook surface part, 12d Recessed side wall, 12e Bending piece, 13 Rear outer plate, 13d Recessed part Side wall, 14 Adhesive tape, 2 Inner plate, 3 Cap, 4 Foam insulation, 51 Upper mold, 52 Lower mold, 61 Block filling member, 62 Block filling member, 7, 7A, 7B Block material, A Handle, A1 handle part convex part, A2 handle part recessed part, B handle part heat insulation part, C convex part inner side part.

Claims (9)

  An outer plate disposed on the outer side of the chamber and whose outer surface forms a design surface, an inner plate disposed on the inner side of the chamber and opposed to the outer plate with a predetermined gap, and between the outer plate and the inner plate And a heat insulating door of a refrigerator provided with an opening / closing handle on at least one predetermined side in a peripheral portion of the outer plate, wherein the handle is the outer cover. A separate member is formed from the plate, and the separate member constitutes an end surface member that connects the outer plate and the inner plate at the end surface portion of the heat insulating door corresponding to the one side portion, and the handle portion. Has a handle portion surface portion continuous with the end of the outer plate constituting the one side portion, bent from the end portion of the handle portion surface portion toward the inner plate, and the thickness direction of the end face portion In the central portion of the handle portion, the handle portion convex portion formed by further bending to the back side of the surface portion of the handle portion Was formed on the back side of the finger receiving portion projecting portions, refrigerator insulating door, characterized in that it is constituted by a finger receiving portion recess capable of inserting a hand.   The connection portion between the one side portion of the outer plate and the surface portion of the handle portion of the separate member is a groove-shaped recess formed at an end of one of the outer plate and the separate member, 2. The heat insulating door for a refrigerator according to claim 1, wherein the heat insulating door of the refrigerator is formed at an end portion of the other member and connected by a bent piece inserted into the groove-like recess while maintaining a predetermined clearance.   A block-shaped filling member that prevents inflow of the foamed heat insulating material and prevents deformation due to foaming pressure of the foamed heat insulating material is loaded on the inner side of the convex portion formed in the convex portion of the handle portion. The heat insulation door of the refrigerator of Claim 1 or Claim 2.   The recess side wall on the inner plate side forming the handle portion recess is opposed to the inner plate through a handle portion heat insulating portion having a predetermined size for heat insulation between the inner plate and the inner plate. 4. The block-shaped filling member that prevents the foam heat insulating material from flowing into the portion and prevents the foam heat insulating material from being deformed by the foaming pressure is loaded. 5. Insulated door for refrigerator.   An outer plate disposed on the outer side of the chamber and whose outer surface forms a design surface, an inner plate disposed on the inner side of the chamber and opposed to the outer plate with a predetermined gap, and between the outer plate and the inner plate When manufacturing a heat insulating door for a refrigerator provided with an opening / closing handle on at least one predetermined side in the peripheral portion of the outer plate. The method includes a step of foaming a foam heat insulating material injected into the inside of the heat insulating door using a mold having a mold, and integrally forming with the foaming pressure, wherein the handle portion is separate from the outer plate. And the separate member constitutes an end surface member that connects the outer plate and the inner plate at the end surface portion of the heat insulating door corresponding to the one side portion, and the handle portion includes the one side portion. It has a handle portion surface portion that continues to the end of the outer plate to be configured, and the end portion of the handle portion surface portion A hook portion convex portion formed by bending further toward the back side of the surface portion of the handle portion at the center portion in the thickness direction of the end face portion, and the hook portion convex portion. A method for manufacturing a heat insulating door for a refrigerator, comprising: a handle portion recessed portion formed on the back side of the portion into which a hand can be inserted.   A block-shaped filling member is loaded in advance on the inner side of the convex portion formed in the handle portion, and the foamed heat insulating material is prevented from flowing into the inner side of the convex portion when the foamed heat insulating material is foamed. 6. The method for manufacturing a heat insulating door of a refrigerator according to claim 5, wherein deformation is prevented by the method.   The recess side wall on the inner plate side forming the handle portion recess is opposed to the inner plate through a handle portion heat insulating portion of a predetermined size for heat insulation between the inner plate and the handle. A block-shaped filling member is pre-loaded in the part heat insulating part, and deformation is prevented by preventing the foam heat insulating material from flowing into the handle part heat insulating part when the foam heat insulating material is foamed. The manufacturing method of the heat insulation door of the refrigerator of Claim 5 or Claim 6.   The block material for preventing deformation is inserted in advance into the concave portion of the handle portion when performing integral molding by the foaming pressure of the foam heat insulating material, according to any one of claims 5 to 7. Method for heat insulating door of refrigerator.   The heat insulation of the refrigerator according to claim 8, wherein the block material for preventing deformation is tapered at the tip end side in the insertion direction by a taper-like straight line or a curve to facilitate insertion and removal. Manufacturing method for doors.

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