JP5722014B2 - Insulated door of storage - Google Patents

Description

  The present invention relates to a heat insulating door equipped in a storage such as a refrigerator.

Conventionally, as an example of this type of heat insulating door, a so-called horizontal round heat insulating door is known. In this case, the exterior plate made of a thin metal plate is formed in a curved shape in which the central portion in the width direction swells in front of the left and right side edges so as to form an arc shape centered on the vertical axis. Side panels are bent back and forth on the left and right side edges, and synthetic resin caps are attached to the upper and lower opening surfaces of the exterior panel. A structure in which an outer shell body is formed by mounting a synthetic resin interior board so as to close the rear opening formed inside the edge, and a heat insulating material made of foamed resin is foam-filled in the outer shell body (For example, refer to Patent Document 1).
Such a horizontal round heat insulating door has advantages such as good design and excellent strength while using a metal thin plate for the exterior plate.

JP-A-8-121946

However, in the conventional heat insulating door, when providing a handle for opening and closing the heat insulating door, a mounting hole is opened at a predetermined position along the side edge on the front surface of the exterior plate, and a separately formed handle is fitted into the mounting hole. In addition to the increase in the number of parts, the processing and assembly of the exterior plate also takes time, leading to high costs.
The present invention has been completed based on the above circumstances, and its purpose is to provide a heat insulating door that can be manufactured at low cost by reducing the number of parts and simplifying the structure. To do.

The present invention is a heat insulating door that is mounted on a front opening of a storage body composed of a heat insulating box so that it can swing open and close around a vertical axis, and the center height position swells to the near side compared to the upper and lower edges . a front plate which is formed in a curved shape, the respectively from the upper and lower edges of the front plate and the metal plate of the exterior plate having a side plate that is bent formed behind, to the left and right side opening of the outer casing A synthetic resin cap attached, and a synthetic resin interior plate mounted by closing a rear opening configured inside the rear edge of the both side plates of the exterior plate and the rear edge of the caps; The outer plate, the inner plate and the heat insulating material foam-filled in both caps , and the front surfaces of both caps are formed in a curved shape following the front plate of the outer plate, the side surface of one of the cap, before the cap Having characterized in that the handle is formed by the arc-shaped groove so as to be along the front is formed.

According to the above configuration, since the handle is formed integrally with the cap, the structure is simple, the number of parts can be reduced, and the manufacturing can be performed at low cost.
In particular, a so-called vertical round heat insulating door is formed in which the front plate of the exterior plate has a substantially arc-shaped curved surface centered on the horizontal axis (horizontal axis). In such a heat insulating door, the right and left side surfaces are formed by the cap, but the front surface of the cap is formed in a curved shape in which the center height position swells toward the front side compared to the upper and lower ends, following the curved shape of the front plate. Has been. Then, a handle is formed by forming a groove along the curved front edge of the side surface of the cap.
Since the groove constituting the handle is formed in a curved shape in which the center height position where the hand is most swelled is swelled toward the front side, it is easy to put on the hand, and thus the heat insulation door is easily opened .
Also, the insulating door of this kind, according to the size and format of reservoirs, it is sometimes provided with a lateral width and various modifications in the insulating door of longitudinal round form, a cap is deposited on the left and right sides As common, it can be applied to various heat insulating doors having different widths.

The following configuration may also be used.
(1) The groove constituting the handle is formed in a form that opens up and down. It is hygienic because it is difficult for dust to collect in the groove.
(2) The groove constituting the handle is formed by a protruding jetty formed at a position along the front edge of the side surface of the cap and a position spaced apart from the same position by a predetermined distance. In addition, the jetty on the front side is formed on a lower back than the jetty on the rear side. Since the jetty on the near side is shorter, it is easier to put a hand on the inside of the groove, that is, the handle.

(3) While the side edge of the front plate of the exterior plate on which the cap is formed, the side edge on which the cap is attached is formed overhanging, and inside the front jetty constituting the handle in the cap. Is formed with an insertion groove into which a protruding portion of a side edge of the front plate is inserted.
Using a dead space such as the inside of the jetty, the cap can be inserted deeply into the side edge of the exterior plate and firmly attached.

(4) A hollow groove is formed inside the front jetty, and a plate-like rib projecting toward the front groove wall of the mating side is formed in the longitudinal direction on the groove wall on the back side of the hollow groove. The insertion groove is formed between the protruding edge of these ribs and the front groove wall.
In order to form the deep insertion groove, it is not necessary to provide a thin and long mold pin, and the durability of the mold can be improved.

  In the heat insulating door of the present invention, since the handle is formed integrally with the cap, the structure is simple, the number of parts can be reduced, and it can be manufactured at low cost.

External appearance perspective view of the refrigerator which concerns on Embodiment 1 of this invention Disassembled perspective view of outer shell of insulated door Side view of exterior plate Front view of outer cap Same side view The same enlarged plan view Same left side view Partial enlarged view of FIG. IX-IX sectional view of FIG. XX sectional view of FIG. Front view of inner cap Same left side view The same enlarged plan view Same expanded plan view Same side view Partial enlarged view of FIG. XVII-XVII sectional view of FIG. Sectional drawing explaining manufacturing process Perspective view of insulated door Front view Plan view Same left side view Same left sectional view Same side view Same right cross-sectional view Partial enlarged view of FIG. The exploded perspective view of the heat insulation door concerning Embodiment 2 of the present invention. Perspective view of cap with handle Perspective view of heat insulation door after completion

<Embodiment 1>
A first embodiment of the present invention will be described with reference to FIGS. In this embodiment, a four-door type commercial refrigerator is illustrated.
As shown in FIG. 1, the entire structure of the refrigerator is provided with a machine room 11 on the upper surface of the refrigerator main body 10 (hereinafter simply referred to as the main body 10) and is supported by legs 12 disposed on the bottom surface of the main body 10.
The main body 10 is formed of a rectangular heat insulating box whose front surface is opened, and a front frame 14 having a cross shape is attached to the front opening 13 of the main body 10, so that a total of four doorways 15 in the vertical and horizontal directions are provided. Is formed. A pair of left and right heat insulating doors 20 are mounted on the entrances 15 arranged side by side in the upper and lower stages so as to be openable and closable. Specifically, each heat insulating door 20 is supported by hinges 19 (partially omitted) at the upper and lower ends of the outer vertical edge, and can swing open and close around the outer vertical edge. Accordingly, the left and right heat insulating doors 20 have a symmetrical shape.

Then, the structure of the heat insulation door 20 is demonstrated. Hereinafter, the heat insulating door 20 on the right side when viewed from the front will be described as an example.
As shown in FIG. 2, the heat insulating door 20 includes a metal plate exterior plate 21 such as a color steel plate, a cap 30 made of a synthetic resin such as ABS resin fitted to the left and right side edges of the exterior plate 21, and a rear surface. An outer shell body 70 is constructed by assembling an interior plate 65 made of a synthetic resin such as ABS resin, which is attached to the opening, and a heat insulating material 75 made of a foamed resin such as a urethane foam resin is formed in the outer shell body 70 (FIG. 23).

The exterior plate 21 is formed by pressing a flat plate having a substantially square shape. As shown on the right side of FIG. 3, the outer plate 21 has a curved shape in which the center height position swells to the near side compared to the upper and lower edges, for example, A front plate 22 formed in a curved shape having an arc shape centering on the horizontal axis (horizontal axis) is provided, and the side plate 23 is bent at a right angle from the upper and lower edges of the front plate 22 toward the rear. Has been formed. The corners on the base end side of the upper and lower side plates 23 are rounded, and the bent portions 24 are bent at right angles so as to face each other at the distal ends of the side plates 23. Further, an insertion portion 25 is formed on the left side edge of the front plate 22 so as to protrude.
However, as shown in the left side of the figure, the front plate 21 is initially formed in a flat plate shape, and the cap 30 is fitted to the left and right side edges of the outer plate 21 as described later. As shown on the right side of the figure, the front plate 21 is formed in a predetermined curved surface shape.

Next, the cap 30 will be described. The cap 30 includes an outer cap 30A that is attached to the right side opening 28R of the exterior plate 21 that is bent as described above, and an inner cap 30B that is attached to the left side opening 28L.
As shown in FIGS. 4 to 10, the outer cap 30 </ b> A is formed in a vertically long thick plate having a height comparable to the overall height of the exterior plate 21, and the front side of the outer cap 30 </ b> A (FIG. 5). The surface of the edge 31 on the left side is formed in a curved shape that bulges toward the front so as to form the curved surface of the front plate 22 in the exterior plate 21. On the other hand, although the end edge 32 on the back side is planar, a predetermined area at both the upper and lower ends protrudes slightly toward the back side.

On the inner surface of the outer cap 30A, as shown in FIG. 7 and FIG. 8, the total length of the curvilinear front edge 31 and the protruding portion of the rear edge 32 are piled up, A continuous insertion groove 35 is formed over these edged edges and the upper and lower edges 33 therebetween. A right edge 21R extending from the front plate 22 to the side plate 23 (including the bent portion 24) in the exterior plate 21 can be inserted into the insertion groove 35.
A relatively short support wall 36 </ b> S is erected on the inner side of the insertion groove 35 formed in the end edge 31 on the near side. On the other hand, a relatively tall support wall 36T is erected on the inner side of the insertion groove 35 formed in the protruding portion of the end edge 32 on the back side.

In addition, a receiving wall 37 having the same height as the above-described support wall 36T is raised and formed along the inner edge 32 on the inner side of the outer cap 30A. The back surface of the receiving wall 37 is a receiving surface 38 with which the right peripheral edge 68 can come into contact with the interior plate 65 when viewed from the front.
As will be described in detail later, the receiving surface 38 is formed with the outer surface of the bent portion 24 inserted into the insertion groove 35 on the back edge side when the right edge 21R of the exterior plate 21 is inserted into the insertion groove 35. It ’s almost flat.

As shown in FIGS. 11 to 17, the inner cap 30B is formed in a vertically long shape having a height comparable to the overall height of the exterior plate 21, similar to the outer cap 30A, and is roughly a shallow opening on the right side surface. This is a structure in which a handle 50 is formed on the left side of the dish-shaped main body 40.
More specifically, a front jetty 46 is formed on the left side surface of the main body 40 along the front wall of the main body 40 as shown in FIGS. 13 and 14. The outer surface of the front pier 46 and the end surface of the front jetty 46 are flush with each other, and the surface of the front edge 41 extending between the main body 40 and the front jetty 46 is the curved surface of the front plate 22 of the exterior plate 21. It is formed in a curved surface swelled to the front side so as to form. Although the back surface of the front jetty 46 is a flat surface, it has a taper shape that spreads at the bottom.

A rear jetty 47 that is taller than the front jetty 46 described above is formed on the rear edge side of the left side surface of the main body 40. The rear end surface of the rear jetty 47 is flush with the outer surface of the rear wall of the main body 40 and is flat (the rear edge 42), while the front surface of the rear jetty 47 is a flat surface. However, it has a tapered shape that spreads at the bottom.
A groove 48 narrowed toward the bottom is formed between the above-described front and rear jetty 46 and 47, thereby forming a handle 50 for opening and closing operation. As shown in FIG. 13, the groove 48 constituting the handle 50 is opened in the vertical direction, and the projecting end of the groove wall 48 </ b> A on the front side is cut off.

  Inside the front jetty 46 constituting the handle 50 as described above, as shown in FIG. 14, in the region on the front side, it is hollowed out in a form communicating from the bottom surface of the main body 40. The hollow groove 52 is formed in a curved shape that swells to the near side along the front plate 22 of the exterior plate 21. The groove wall 52 </ b> B on the near side of the hollow groove 52 is flush with the inner surface of the front wall of the main body 40. Also in the rear jetty 47, a hollow groove 53 is formed which is hollowed out in a form communicating from the bottom surface of the main body 40.

As shown in FIG. 15, a plurality of sandwiching plates 55 are formed on the groove wall 52A on the inner side of the hollow groove 52 formed in the front jetty 46 so as to protrude at predetermined intervals along the length direction. Yes. The sandwiching plate 55 includes a short low sandwiching plate 55S and a tall high sandwiching plate 55T. The low sandwiching plate 55S has a front edge facing the groove wall 52B on the near side of the hollow groove 52. In a form in which a predetermined interval is provided between the groove wall 52B, the groove wall 52B is formed to a position slightly below the opening edge of the hollow groove 52. The rising edge of the low clamping plate 55S is formed in an arc shape for guide.
One high clamping plate 55T has an opening of the main body 40 in a form in which the front edge facing the groove wall 52B on the near side of the hollow groove 52 is spaced from the groove wall 52B at the same interval as described above. It is formed to a position slightly beyond the edge.

As shown in FIG. 15, the high clamping plates 55T are arranged at an appropriate number between the low clamping plates 55S. In this example, the central height position is arranged more than the upper and lower end portions. The density is high.
Between the projecting edges of these sandwiching plates 55T and 55S and the front groove wall 52B of the hollow groove 52, the insertion portion 25 that is formed on the left side edge of the front plate 22 of the exterior plate 21 is inserted. A substantially deep insertion groove 57A is formed.

  Further, on the inner surfaces of the upper and lower end portions of the main body portion 40 of the inner cap 30B, the upper and lower end edges 43 from the portion of the front end edge 41 that continues from the upper and lower sides of the deep insertion groove 57A, and the far end edge 42 A relatively shallow insertion groove 57B is formed across the upper and lower end portions of each. In this insertion groove 57B, a left side edge 21L extending from a narrow portion at the upper and lower ends of the front plate 22 to the side plate 23 (including the bent portion 24) in the outer plate 21 can be inserted. A support wall 58 is erected inside the shallow insertion groove 57B.

As shown in FIGS. 14 and 16, a recess 60 is formed on the surface of the rear edge 42 extending from the rear wall of the main body 40 to the rear jetty 47 in the inner cap 30 </ b> B except for a part of the upper and lower ends. Are formed in a stepped shape, and the stepped surface of the recess 60 is a receiving surface 61 with which the left peripheral edge 68 can come into contact with the interior plate 65 when viewed from the front.
The receiving surface 61 is substantially flush with the outer surface of the bent portion 24 inserted into the insertion groove 57B on the back edge side when the insertion edge 57B is inserted into the left edge 21L of the exterior plate 21. It has become.

As shown in FIGS. 2 and 18, the interior plate 65 is formed in a substantially square shape that is slightly smaller than the exterior plate 21 described above. A packing mounting groove 66 for mounting a packing (not shown) is provided on the back surface of the interior plate 65 so as to form a substantially square shape at a position within a predetermined dimension from the periphery. The packing mounted in the packing mounting groove 66 functions so as to abut against the mouth edge of the corresponding entrance 15 when the heat insulating door 20 is closed.
In addition, a protruding wall 67 is formed on the inner surface of the packing mounting groove 66 on the back surface of the interior plate 65 so as to rise in a substantially square shape. Similarly, when the heat insulating door 20 is closed, the protruding wall 67 enters the inside of the corresponding peripheral surface of the entrance 15 and functions to suppress heat exchange between the cool air inside the cabinet and the outside air.

Then, the peripheral edges 68 on the four sides outside the packing mounting groove 66 on the back surface of the interior plate 65 contact the upper and lower bent portions 24 of the exterior plate 21 and the receiving surfaces 38 and 61 of the inner and outer caps 30A and 30B. It is a contact edge that comes into contact.
In addition, a plurality of vertical grooves 69 are formed in the central portion of the interior board 65 for the purpose of increasing the bonding force with the foam-filled heat insulating material 75 as will be described later.

As shown in FIG. 21, hinge collars 26 for fitting the pins of the hinge 19 provided at the mouth edge of the entrance / exit 15 are mounted on the upper and lower ends of the vertical edge on the right side of the heat insulating door 20.
Therefore, as shown in FIG. 2, a reinforcing plate 27 that is substantially channel-side is fitted on the right end side of the upper and lower side plates 23 of the exterior plate 21 and is fixed by screws or the like, and is opened to the reinforcing plate 27. The hinge collar 26 is fitted and attached to the mounting hole through an insertion hole formed at the right end of the side plate 23.
The heat insulating door 20 on the left side when viewed from the front is symmetrical with the above.

Then, an example of the manufacturing process of the heat insulation door 20 is demonstrated.
First, the hinge collar 26 is fitted to the right end of the upper and lower side plates 23 in the exterior plate 21 via the reinforcing plate 27.
Next, the outer cap 30A and the inner cap 30B are attached to the right and left side openings 28R and 28L of the exterior plate 21, respectively.
Specifically, the outer cap 30A is formed continuously from the entire length of the curvilinear front edge 31 to the upper and lower edges 33 and further to a predetermined area on both upper and lower edges of the rear edge 32. The right edge 21R extending from the front plate 22 to the side plate 23 (including the bent portion 24) in the exterior plate 21 is inserted and held in the insertion groove 35 (see FIG. 23).

  On the other hand, as shown in FIG. 26, the inner cap 30B has a groove wall 52B on the near side of the hollow groove 52 provided along the curved front edge 41 and both sandwiching plates 55S. , 55L, the insertion portion 25 formed on the left edge 21L of the front plate 22 of the exterior plate 21 is inserted into the substantially deep insertion groove 57A formed between the exterior plate 21 and the exterior plate 21. The portion extending from the inner side of the insertion portion 25 in the left edge 21L of the front plate 22 to the left edge 21L of the side plate 23 (including the bent portion 24) is on the front side of the deep insertion groove 57A. The region is inserted and held in shallow insertion grooves 57B formed continuously over a predetermined region on both upper and lower edges 43 and upper and lower end edges 42.

  When the inner and outer caps 30B and 30A are attached to the left and right side openings 28L and 28R of the exterior plate 21, the intermediate outer shell 71 is formed. As shown in FIG. 18, the intermediate outer shell 71 is formed in a thin box shape in which a square opening 72 is formed on substantially the entire rear surface. The peripheral edge of the rear opening 72 in the intermediate outer shell 71 has upper and lower edges at the bent portions 24 of the upper and lower side plates 23 of the exterior plate 21 and both left and right edges at the inner edge of the caps 30A and 30B. It is formed by the provided receiving surfaces 38 and 61. The bent portion 24 and the receiving surfaces 38 and 61 are arranged flush with each other.

As shown in FIG. 18, the intermediate outer shell body 71 assembled as described above is placed in a horizontal position on the lower mold of the foaming jig, and a liquid foamed resin is placed in the intermediate outer shell body 71. Injected. After that, the inner plate 65 covers the rear opening 72 of the intermediate outer shell 71, and in detail, the upper and lower peripheral edges 68 of the inner plate 65 are on the upper and lower edges (folded portion 24) of the rear opening 72. The left and right peripheral edges 68 of the interior plate 65 are pressed by the upper mold in a state where the left and right peripheral edges 68 are respectively in contact with the receiving surfaces 38 and 61 of the caps 30A and 30B. As a result, the outer shell body 70 is formed, while the heat insulating material 75 is foam-filled in the outer shell body 70, and the interior plate 65 closes and closes the rear opening 72 as shown in FIGS. 19 to 26. A heat insulating door 20 in a state is formed.
The heat insulating door 20 on the left side when viewed from the front is also manufactured in the same procedure as described above.

The heat insulating door 20 manufactured as described above is attached to the packing mounting groove 66 provided around the back surface of the interior board 65, and then the right heat insulating door 20 has both upper and lower ends of the right vertical edge. The hinge 19 provided on the right edge of the corresponding right / left entrance 15 is fitted into the hinge collar 26 provided on the left side, and the left heat insulating door 20 has hinges provided on both upper and lower ends of the left vertical edge. By fitting the pin of the hinge 19 arranged on the left edge of the corresponding left and right entrance 15 to the collar 26, it is mounted so as to be openable and closable. When the pair of left and right heat insulating doors 20 are closed, the grips 50 of both heat insulating doors 20 are adjacent to each other and face each other.
In the closed state, the packing attached along the peripheral edge of the back surface of the heat insulating door 20 is in close contact with the mouth edge of the corresponding entrance 15 to seal the entrance 15.
In the case of opening the door, it is only necessary to place the hand on the handle 50 provided on the inner side edge of each heat insulating door 20 and pull it to the front side.

  As described above, in the heat insulating door 20 of the present embodiment, the front plate 22 of the exterior plate 21 is formed as a vertical round heat insulating door 20 having an arc shape centered on the horizontal axis (horizontal axis). In the heat insulating door 20, the left and right side surfaces are formed by the caps 30A and 30B. Here, since the handle 50 for opening and closing the heat insulating door 20 is integrally formed with the cap 30B located on the inner side edge, the structure is simple, the number of parts can be reduced, and the manufacturing cost is low. can do.

Specifically, the handle 50 has a front jetty 46 that rises along the front edge 41 of the cap 30B that swells to the front side, and a rear jetty 47 that rises from the same position to a rearward position by a predetermined dimension. It is formed by forming a groove 48 opened vertically between 46 and 47.
The groove 48 constituting the handle 50 is formed in an arc shape in which the center height position where the hand is most swelled is swelled to the front side, so that the hand can be easily put on and the heat insulating door 20 can be easily opened. Further, since the grooves 48 constituting the handle 50 are opened up and down, it is difficult for dust to collect in the grooves 48 and is hygienic.
Furthermore, since the front jetty 46 is formed with a lower height than the rear jetty 47, it is easy to put a hand in the groove 48, that is, the handle 50.

  Note that this type of heat insulating door 20 may be provided with various changes in width depending on the size of the refrigerator, the type of door arrangement, and the like. The attached caps 30 </ b> A and 30 </ b> B can be applied to various heat insulating doors 20 having different widths.

Further, in the structure of the portion where the inner cap 30B is attached, the insertion portion 25 that is deeply inserted into the side edge of the front plate 22 of the exterior plate 21 is inserted by using a dead space such as the inside of the front jetty 46. Since the groove 57A is formed, the inner cap 30B can be firmly attached.
Further, in forming the deep insertion groove 57A as described above, the hollow groove 52 is formed inside the front jetty 46, while the groove wall 52A on the inner side of the hollow groove 52 is formed on the groove wall 52B on the other side of the counterpart. Since the sandwiching plates 55S and 55L projecting toward the bottom are formed at intervals, and deep insertion grooves 57A are formed between the projecting edges of these sandwiching plates 55S and 55L and the front groove wall 52B, It is not necessary to provide a thin and long mold pin to form the deep insertion groove 57A, which is effective in improving the durability of the molding mold.

<Embodiment 2>
Next, a second embodiment of the present invention will be described with reference to FIGS.
In this embodiment, the heat insulation door 80 of the horizontal round form is illustrated. The four heat insulating doors 80 are constituted by common components, and as shown in FIG. 27, an exterior plate 81 made of a metal plate such as a color steel plate, and an ABS that is fitted on both upper and lower edges of the exterior plate 81. An outer shell 95 is formed by assembling a cap 85 made of synthetic resin such as resin and an interior plate 92 made of synthetic resin such as ABS resin, which is mounted in the rear opening, and urethane foam is formed in the outer shell 95. It has a structure filled with a heat insulating material (not shown) made of foamed resin such as resin.

The exterior plate 81 is formed in a curved shape in which the central portion in the width direction swells to the near side compared to the left and right side edges, for example, a curved shape that forms an arc shape centered on the vertical axis (vertical axis). A face plate 82 is provided, and a side face plate 83 is bent at a right angle from the left and right edges of the front plate 82 toward the rear. The corners on the base end sides of the left and right side plates 83 are rounded, and the bent portions 84 are bent at right angles so that the bent portions 84 face each other at the distal ends of the side plates 83.
As in the first embodiment, the front plate 82 of the exterior plate 81 has a flat plate shape, and is formed in the curved shape described above by fitting caps 85 on both upper and lower edges.

The cap 85 is formed in a shape such that a horizontally long shallow dish having a length comparable to the entire width of the exterior plate 81 is turned down, and the front end face of the cap 85 is the front plate 82 of the exterior plate 81. It is formed in a curved surface swelled to the near side so as to form a curved surface.
An insertion groove 86 into which the upper edge or the lower edge of the exterior plate 81 can be inserted is formed on the inner surface of the cap 85. A hinge collar 87 can be fitted to the left and right ends of the cap 85 via a reinforcing plate 88.
On the outer surface of one cap 85A, as shown in FIG. 28, a laterally long groove 89 is formed in the middle in the width direction, thereby forming a handle 90. A groove wall 89A on the near side of the groove 89 constituting the handle 90 is formed in an arc shape that swells toward the near side.
The interior plate 92 has the same structure as that of the interior plate 65 shown in the first embodiment, and therefore, parts having the same function are denoted by the same reference numerals and description thereof is omitted.

  The heat insulating door 80 is manufactured as follows. Of the four heat insulating doors 80, the heat insulating door 80 arranged on the upper right has a cap 85A on the side where the handle 90 is provided arranged on the lower side, and a hinge collar 87 fitted on the right side of both caps 85, 85A. After that, the upper and lower caps 85 and 85A are attached to the upper and lower side openings 82A of the exterior plate 81 to form an intermediate outer shell, injecting a liquid foamed resin into the intermediate outer shell, By covering and mounting the interior plate 92 on the rear surface opening of the shell body, as shown in FIG. 29, a heat insulating door 80 having a handle 90 opened on the lower surface side is formed.

In contrast to the above, the lower right heat insulating door 80 is formed in a form in which a cap 85 provided with a handle 90 is attached to the upper surface.
Further, the left and right upper and lower heat insulating doors 80 are formed in the same manner as described above in a form in which the hinge collar 87 is fitted to the left end portions of the caps 85 and 85A.

  Also in the heat insulation door 80 of the so-called horizontal round type illustrated in the second embodiment, the handle 90 for opening and closing the heat insulation door 80 is formed integrally with any one of the caps 85A. The number of parts can also be reduced, so that it can be manufactured at low cost.

  Similarly, the groove 89 constituting the handle 90 is formed in an arc shape in which the central portion in the width direction where the hand is most swelled is swelled toward the front side, so that it is easy to put on the hand, and the heat insulating door 80 is easily opened. . Further, in the heat insulating door 80 arranged on the upper side, the groove 89 constituting the handle 90 is opened downward so that dust does not easily accumulate in the groove 89, while in the heat insulating door 80 arranged on the lower side, the handle 89 Although the groove 89 constituting 90 is open upward, since the upper portion of the groove 89 is covered with the upper heat insulating door 80, dust is hardly collected in the groove 89 and is hygienic.

<Other embodiments>
The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention.
(1) In the above embodiment, the case where the front plate of the exterior plate is formed into an arc shape having a constant radius of curvature over the entire height or width is illustrated as an example of the curved surface bulging toward the front side. The curved surface shape itself can be arbitrarily selected, such as changing the radius of curvature between the center and both ends.
(2) In the above embodiment, the case where the front plate of the exterior plate is formed into a curved surface by initially fitting a flat plate with caps on both side edges is illustrated, but it is formed into a curved surface from the time of press molding. You may make it do.
(3) In the first embodiment, the heights of the front and rear jetty formed on the cap to form the handle can be arbitrarily set such as the same height or the rear side being lower.
(4) In the first embodiment, the groove for forming the handle does not need to be opened up and down, and such a groove is also included in the technical scope of the present invention.

(5) Conversely, in the second embodiment, a groove for forming a handle may be opened to the left and right.
(6) The manufacturing procedure of the heat insulating door is not limited to that exemplified in the above embodiment. For example, an outer plate, a cap, and an inner plate are assembled in advance to form an outer shell, and then the heat insulating material is foamed in the outer shell. You may make it fill.
(7) The present invention is not limited to the refrigerators exemplified in the above-described embodiment, but can be widely applied to heat insulating doors installed in general storages including freezers, cooling storages such as refrigerators and refrigerators, and warm storages. it can.

  DESCRIPTION OF SYMBOLS 10 ... Refrigerator main body (storage main body) 13 ... Front opening 15 ... Entrance / exit 19 ... Hinge 20 ... Thermal insulation door 21 ... Exterior plate 22 ... Front plate 23 ... Side plate 24 ... Bending part (rear edge of exterior plate 21) 25 ... Insertion part (overhanging part) 28L, 28R ... Side opening 30,30A, 30B ... Cap 32 ... Receiving surface (rear edge of cap 30A) 46 ... Front jetty 47 ... Rear jetty 48 ... Groove 50 ... Handle 52 ... 52A, 52B ... groove wall 55S, 55T ... clamping plate (rib) 57A ... insertion groove 61 ... receiving surface (rear edge of cap 30B) 65 ... interior plate 70 ... outer shell body 71 ... intermediate outer shell body 72 ... rear opening 75 ... Insulating material 80 ... Insulating door 81 ... Exterior plate 82 ... Front plate 83 ... Side plate 84 ... Bent part (Rear edge of the exterior plate 81) 82A ... Side opening 85, 85A ... Cap 89 ... Groove 90 ... Handle 92 ... Interior plate

Claims (5)

A heat insulating door mounted on the front opening of the storage body consisting of a heat insulating box so that it can swing open and close around the vertical axis,
Made of a metal plate having a front plate formed in a curved shape whose center height swells to the near side compared to the upper and lower edges , and a side plate bent backward from the upper and lower edges of the front plate An exterior plate,
Synthetic resin caps respectively attached to the left and right side openings of the exterior plate;
An interior board made of synthetic resin, which is mounted by closing a rear opening formed on the inside of the rear edge of the both side face plates of the exterior board and the rear edge of the caps;
It consists of the exterior plate, the interior plate, and a heat-insulating material filled with foam in both caps,
And wherein with the front of both the cap is formed in a curved shape in which the following the front plate of the outer casing, a side surface of one of said cap, arc as along the front surface of the cap A heat insulating door of a storage, wherein a handle is formed by forming a groove of a shape . Insulating door reservoirs according to claim 1, characterized in that it is made form a form in which the groove constituting the handle are opened vertically. The groove constituting the handle is formed by rising a jetty at a position along the front edge of the side surface of the cap and at a position spaced apart from the position by a predetermined dimension, and The heat insulation door of the storage according to claim 2, wherein the front jetty is formed with a lower back than the rear jetty. The side edge on the side where the cap on which the handle is formed on the front plate of the exterior plate is formed in an overhanging manner, while the inside of the front jetty constituting the handle in the cap, The heat insulation door of the storage according to claim 3, wherein an insertion groove into which a protruding portion of a side edge of the front plate is inserted is formed. A lightening groove is formed inside the front jetty, and a plate-like rib protruding toward the front groove wall on the other side is spaced apart in the length direction on the groove wall on the back side of the lightening groove. The heat insulation door of the storage according to claim 4, wherein the insertion groove is formed between the projecting edge of the rib and the front groove wall.

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