JP2005241142A - Heat insulating casing - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reinforce corner parts of an inner box in a reinforcement structure of a heat insulating casing used in a main body of a cooling storage and the like, in particular, the inner box. <P>SOLUTION: Rising parts 25 are formed on both end parts of a bottom panel 22 constituting a bottom face of the inner box 20 in a state of being bent at a right angle, and outward flanges 26 are formed on their upper edges. Outward flanges 27 are also formed on lower edges of side panels 23. Both flanges 26, 27 are superposed to each other and fastened by rivets 28 in forming the inner box 20. Whereby the corner parts 30A are formed on a bottom side of the inner case 20 at bent parts of the bottom panel 22 itself, connection parts 32 of the bottom panel 22 and the side panels 23 are formed on a position upper than an inner bottom face of the inner box 20 by a specific size A. L-shaped reinforcement members 40 are attached to outer faces of the corner parts 30A on the bottom face side, cut parts 46 are formed on upward side parts 44A corresponding to a side face side of the inner box 20, and both flanges 26, 27 are inserted in the cut parts to be fitted with relief, and fixed by spot welding. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a heat insulating box used for a main body such as a cooling storage, and more particularly to a reinforcing structure of an inner box.

  As an example of a commercial refrigerator, a pass-through type refrigerator is known. In this case, a cart or an operator on which stored items are placed can enter and leave the warehouse, and a heat insulating box having both front and rear surfaces is applied to the heat insulating box constituting the main body. For example, the heat insulating box is formed by connecting a plurality of panels to form a box-like inner box and an outer box that are open on both front and rear surfaces, and the inner box is incorporated into the outer box and It is formed by being filled with a heat insulating material made of foamed resin (see, for example, Patent Document 1).

By the way, in the heat insulating box having a structure in which both front and rear surfaces are opened as described above, for example, it is easily deformed when pushed from the side surface, or is shaken or deformed when opening and closing a heat insulating door that is relatively heavy. Therefore, reinforcement is required. Therefore, conventionally, as shown in FIG. 13 (A), at the four corners of the inner box 1, the L-shaped reinforcing member 2 is attached at least to the outer surface at two positions in the front-rear direction.
As an example of the corner on the bottom side, as shown in FIG. 5B, a flange 3A in which the edge of the bottom panel 3 is extended straight, and a flange in which the lower edge of the side panel 4 is bent outward at a right angle. 4A is overlapped, and a corner is formed by fastening with rivets 5, and the L-shaped reinforcing member 2 is applied to the outer surface of this corner while fitting both flanges 3A and 4A into the notch 6 and letting it escape, It is fixed by welding or the like.
JP-A-8-75344

When the reinforcing structure as described above is applied, for example, when the heat insulating box is pushed from the side and a load that deforms the corner of the inner box 10 acts, the L-shaped reinforcing member 2 receives this. The bent portion of the L-shaped reinforcing member 2 where the load is concentrated is provided with a notch 6 for releasing the flanges 3A and 4A, so that the strength of the L-shaped reinforcing member 2 itself is increased. Therefore, it could not be said that a sufficient reinforcing function was obtained.
In addition, since the joint 7 between the bottom panel 3 and the side panel 4 is in the same position as the inner box 1, that is, the inner bottom of the heat insulation box, when the refrigerator is operated, the joint 7 is immersed in the heat insulating material. Therefore, it is necessary to close the joint 7 with the caulking material 8, and there is a problem that the manufacturing is troublesome.
The present invention has been completed based on the above circumstances.

  According to the first aspect of the present invention, an inner box and an outer box are formed by connecting a plurality of panels in a box shape, and the inner box is incorporated into the outer box and a heat insulating material is filled between the two boxes. In the heat insulation box formed by attaching an L-shaped reinforcing member to the outer surface at the corner of the inner box, the both sides of the bottom panel in the inner box are on the side surface side of the inner box. The rising portion that wraps around is bent and formed, outward flanges are formed on the edges of the rising portion and the side panel that face each other, and both flanges are joined together. In the side portion corresponding to the side surface side of the inner box, a notch portion for releasing the coupling portion of the both flanges is formed.

According to a second aspect of the present invention, in the first aspect of the present invention, a reinforcing plate made of a single plate is bonded to the outer surface of a region extending from the bottom portion of the inner box to the rising portion of the bottom panel. It has a characteristic where it exists.
The invention of claim 3 is characterized in that, in the invention described in claim 2, the both flanges are joined together by fastening with a fastener together with the end of the reinforcing plate.

<Invention of Claim 1>
By connecting the outward flanges provided at the rising parts at both ends of the bottom panel and the outward flanges provided on the side panel, the bent portion of the bottom panel itself is connected to the bottom side of the inner box. A corner portion is formed, and a joint between the bottom panel and the side panel is formed at a position above the inner bottom surface of the inner box by a predetermined dimension. An L-shaped reinforcing member is applied to the outer surface of the corner portion on the bottom surface side. However, both flanges are fitted into a notch portion provided on a side portion corresponding to the side surface side of the inner box, and are applied and fixed.

When the heat insulating box is pushed from the side, for example, a load that deforms a corner on the bottom side of the inner box acts. The corner on the bottom side of the inner box is formed seamlessly by the bent part of the bottom panel itself, and the portion without the notch in the L-shaped reinforcing member extends over a wide range of the outer surface of the corner without the joint. Since it is applied, the strength of the corner increases. When a load such as the above is applied, the load concentrates on the bent portion of the L-shaped reinforcing member, but the notch for escaping the flange is shifted to the side to ensure the strength of the bent portion. Therefore, a sufficient reinforcing function is exerted on the inner box and thus the heat insulating box. Therefore, generation | occurrence | production of the distortion of a heat insulation box can be reduced.
Since the joint between the bottom panel and the side panel is formed at a position higher than the inner bottom of the inner box, that is, the heat insulation box, there is little possibility of water from the joint during operation. Since it is not necessary to close it, the manufacturing process can be simplified.

<Invention of Claim 2>
In the region extending from the portion that becomes the bottom surface of the inner box to the rising portion in the bottom panel, the plate thickness is substantially increased, and the corner portion on the bottom surface side is enhanced together with the bottom surface of the inner box. In the case where the reinforcing plate is already provided on the bottom surface of the bottom panel, the corner portion on the bottom surface side can be strengthened by a simple shape change such as extending the end portion and turning around the rising portion side.
<Invention of Claim 3>
On the side surface of the inner box, the relatively thin flanges are joined together to form a joint. For example, when a force that bends the side surface of the inner box is applied, there is a concern that the inner box may be bent. . In this respect, in the present invention, both flanges are joined together with the end of the reinforcing plate together with the fasteners, so that the joint can be strengthened, and even when a force that bends the side surface of the inner box is applied. Is prevented from being bent.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
<Embodiment 1>
A first embodiment of the present invention will be described with reference to FIGS. In this embodiment, a pass-through type refrigerator is illustrated.
The whole structure will be described with reference to FIG. 1 and FIG. 2. In this refrigerator, the main body is constituted by a heat insulating box 10 having both front and rear surfaces opened, and the front and rear openings 11 are partitioned left and right by a vertical partition frame 12. Each pair of heat insulating doors 13 is mounted in a double-spread type. A machine room 15 is provided on the upper surface of the heat insulation box 10 to mount a refrigeration device 16, and a cooler (not shown) connected to the refrigeration device 16 is provided on a ceiling portion in the heat insulation box 10. Then, the cool air generated by the cooler is circulated to cool the interior.
On the other hand, slopes 17 are provided at the front and rear edges of the bottom surface of the heat insulation box 10 so that the cart 18 or the worker carrying the stored item X can enter and exit the cabinet from both the front and rear sides while opening and closing the heat insulation door 13. It has become.

The heat insulating box 10 is formed by joining a plurality of panels to form a box-like inner box 20 and an outer box that are open on both front and rear surfaces, and the inner box 20 is spaced a predetermined distance from the outer box. The space between the opening edges of both boxes is closed with a connecting plate, and a heat insulating material made of foamed resin such as urethane foam is filled between the boxes.
This embodiment is characterized by the reinforcing structure of the inner box 20 constituting the heat insulating box 10, and will be described in detail below.

As shown in FIGS. 3 and 4, the inner box 20 includes a ceiling panel 21 made of a metal plate such as a stainless steel plate, a bottom panel 22, and two left and right side panels 23, and these four panels 21, 22 and 23 are assembled in a rectangular box shape opened on both front and rear sides as described above.
The bottom panel 22 is formed to have a length slightly larger than the opening dimension of the inner box 20, and has a predetermined height dimension A (see FIG. 5: 1 of the total height dimension of the inner box 20) at both left and right ends thereof. A rising portion 25 having a small degree) is formed by being bent at a right angle upward. A flange 26 is formed on the upper edges of both rising portions 25 and is bent outward at a right angle over the entire width (the entire depth).
On the other hand, the left and right side panels 23 are formed to have a height obtained by subtracting the height dimension of the rising portion 25 of the bottom panel 22 from the total height of the inner box 20, and the lower edge of the side panel 23 is the rising portion 25. It is designed to be faced with the upper edge. A flange 27 that is also bent outward at a right angle is formed over the entire width of the lower edge of the side panel 23.

  Then, the flange 27 on the lower edge of the side panel 23 and the flange 26 on the upper edge of the rising portion 25 of the bottom panel 22 are vertically overlapped, and rivets 28 are driven at a plurality of positions at appropriate intervals in the depth direction. The flanges 26 and 27 are fastened together. As a result, a corner 30A on the bottom surface side of the inner box 20 is formed at the right-angled portions of both ends of the bottom panel 22 itself, and the bottom surface is located at a position above the inner bottom surface of the inner box 20 by a predetermined dimension A. A joint 32 between the panel 22 and the side panel 23 is formed.

  With respect to the coupling structure of the ceiling panel 21 and the left and right side panels 23, flanges extending straightly are formed at the left and right ends of the ceiling panel 21, while the upper edge of the side panel 23 faces outward in the same manner as the lower edge. A flange bent at a right angle is formed, and overlapping portions 34 of both flanges are fastened by rivets 28 at a plurality of locations. On the ceiling side, the joint between the ceiling panel 21 and the side panel 23 is a corner 30B. In addition, the window hole 35 utilized for equip | installing a cooler in the store | warehouse | chamber is formed in the one side of the ceiling panel 21. FIG.

  By assembling the four panels 21, 22, and 23 as described above, the inner box 20 having a rectangular box shape opened on both front and rear surfaces is formed. In the inner box 20, the left and right corner portions 30A on the bottom side and the left and right corner portions 30B on the ceiling side are reinforced, and more specifically, the corner portions 30A on the bottom side are close to the front and rear opening edges. The four places, two places in the middle of the depth direction, and the two corners close to the front and rear opening edges in the corner 30B on the ceiling side are the reinforcing places.

An L-shaped reinforcing member 40 is provided to reinforce the corner 30A on the bottom side. The L-shaped reinforcing member 40 is made of a metal plate such as a steel plate that is thicker than the panels 21, 22, and 23. The mounting plate is bent at right angles outward at both opening edges of the channel portion 41. As shown in FIG. 5, a straight shape is formed between the edges 43 of the abutted incised portions after being bent at a right angle from the incised portions in the middle of the length direction. Are fixed by welding to form an L shape as a whole.
The side portion 44A facing upward in the L-shaped reinforcing member 40 is applied to the side surface side of the corner portion 30A on the bottom surface side, and has a length dimension that is approximately twice the height dimension A of the joint 32 described above. Yes. On the other hand, the side portion 44B facing sideways is applied to the outer bottom surface side of the corner portion 30A on the bottom surface side, and has a length dimension slightly larger than that of the upward side portion 44A.

Here, as shown in FIG. 5, the upward side portion 44 </ b> A of the L-shaped reinforcing member 40 is located at a position corresponding to the fastening portion between the flange 26 of the rising portion 25 of the bottom panel 22 and the flange 27 of the side panel 23. A notch 46 is formed in which both flanges 26 and 27 are fitted and escaped.
A plurality of through holes 47 are formed on both side surfaces of the channel portion 41 so that the heat insulating material being foamed can be circulated.

The overall shape of the L-shaped reinforcing member 40A for reinforcing the corner portion 30B on the ceiling side is the same as the L-shaped reinforcing member 40 for the corner portion 30A on the bottom surface side. However, it is composed of a lateral side 44B and a downward side 44C. Further, on the ceiling side, the portion 34 where the flanges of the ceiling panel 21 and the side panel 23 are fastened with the rivets 28 is just at the corner 30B. Therefore, in the L-shaped reinforcing member 40A on the ceiling side, the flanges are fastened together. A notch 46A for fitting the portion 34 to escape is provided in the bent portion.
Although a detailed description is omitted, a reinforcing member 48 for increasing the mounting strength of the partition frame 12 is attached to the center positions of the front and rear edges of the ceiling panel 21. Similarly, the reinforcing member 48 is provided with an outward mounting plate 42 at both opening edges of the channel portion 41, but is formed in a short linear shape.

Further, a connecting member 50 for connecting the above-described L-shaped reinforcing members 40, 40A and the like is provided. The connecting member 50 is formed of a straight channel material that is slightly larger and can be fitted around the channel portions 41 of the reinforcing members 40, 40 </ b> A, 48. A total of eight connecting members 50B are provided, four connecting members 50B and one connecting member 50C arranged on the side panel 23.
In the connecting member 50 </ b> C for the side panel 23, a notch 52 is formed at a predetermined position of the lower end of the connecting member 50 </ b> C so that a fastening portion between the flange 26 of the rising portion 25 of the bottom panel 22 and the flange 27 of the side panel 23 is fitted and released. Yes.
In addition, on both side surfaces of each connecting member 50, through-holes 53 that allow the heat insulating material being foamed to flow are formed.

When reinforcing both corners 30A on the bottom surface side, the L-shaped reinforcing member 40 is applied to the outer surface side at four locations, two locations near the front and rear opening edges and two locations in the middle of the depth direction. Specifically, the L-shaped reinforcing member 40 is positioned by a positioning portion 47 (see FIGS. 6 and 7), and as shown in FIG. 5, the side portion 44B facing sideways is applied to the lower surface of the bottom panel 22, while the side facing upward The portion 44A is applied to the outer surface extending from the rising portion 25 of the bottom panel 22 to the lower end of the side panel 23 while the fastening portions of the flanges 26 and 27 are fitted into the cutout portion 46, and the mounting plate 42 is spotted at a plurality of positions. Fixed by welding.
Further, on the outer bottom surface side, the connecting members 50B are respectively passed between the lateral side portions 44B of the L-shaped reinforcing member 40 paired on the left and right sides, and both ends of the connecting member 50 are fitted into the corresponding channel portions 41. After that, it is fixed with screws 56 (see FIG. 7).

With respect to the two corner portions 30B on the ceiling side, the L-shaped reinforcing member 40A is applied to the outer surface side while fitting the fastening portions 34 of both flanges into the notch portions 46A and is released at two locations close to the front and rear opening edges. 44C are fixed by spot welding. In addition, the short reinforcing members 48 are also fixed to the center positions on both front and rear edges of the ceiling panel 21 by spot welding so that they are aligned with the lateral sides 44A of the left and right L-shaped reinforcing members 40A. . Then, on the upper surface of the ceiling panel 21, the connecting members 50 are fitted over the lateral side portions 44A and the reinforcing members 48 of the left and right L-shaped reinforcing members 40A, and are similarly screwed and fixed.
Furthermore, on the outer surface of the side panel 23, the downward side portion 44C of the L-shaped reinforcing member 40A fixed to the front edge side of the corner portion 30B on the ceiling side, and the L fixed to the front edge side of the corner portion 30A on the bottom surface side. A connecting member 50 </ b> C is passed between the upward side portion 44 </ b> A of the mold reinforcing member 40. At this time, the fastening portions of the flanges 26 and 27 are fitted into the cutout portion 52 provided at the lower end portion of the connecting member 50 </ b> C to be released. Similarly, both end portions of the connecting member 50C are fitted into the corresponding channel portions 41 and then fixed with screws.

  Thus, the manufacture of the inner box 20 including the reinforcement is completed. As described above, the inner box 20 is incorporated into the outer box formed by joining a plurality of panels with a predetermined interval, and the connection edge between the opening edges of the two boxes is closed. As a result, the outer shell is formed, and the outer shell is filled with foamed resin (heat insulating material) such as foamed urethane resin, whereby the heat insulating box 10 is formed.

Since the cart 18 is put in and out of the heat insulating box 10 as the main body as described above, the protective plate 60 is provided at the lower position of the left and right inner side surfaces. The protection plate 60 is made of, for example, a metal plate, and, as shown by the chain lines in FIGS. It is provided so as to cover the entire area of and extend over the interior. However, the front and rear ends are inclined surfaces 61. The height of the protection plate 60 has a height dimension B slightly less than twice the height dimension A to the joint 32 on the side surface of the inner box 20 (see FIG. 5), and at least the height to the joint 32. A thing taller than the dimension A is desirable. The protection plate 60 is detachably attached by attaching a mounting plate 62 provided on the upper surface thereof to the inner surface of the side panel 23 of the inner box 20 with a screw 63.
Further, as shown in FIG. 1, a thick protective band 65 made of synthetic resin or the like is attached to the position on the lower side of the partition frame 12 by bonding or the like over the left and right side surfaces and the inner surface. .

The present embodiment has the above-described structure, and when the heat insulating box 10 (main body) is pushed from the side, for example, a load that deforms the corner 30A on the bottom side of the inner box 20 acts. Here, the corner portion 30A on the bottom surface side of the inner box 20 is formed seamlessly by the right-angled portions at both ends of the bottom panel 22 itself, and the portion without the notch 46 in the L-shaped reinforcing member 40 is Since it is applied over a wide range of the outer surface of the corner portion 30A without joints, the strength of the corner portion 30A increases. When the load as described above is received, the load concentrates on the bent portion of the L-shaped reinforcing member 40, but the notch portion 46 for releasing the fastening portion of the flanges 26 and 27 is in the middle of the upward side portion 44A. Since the bent portions are provided at different positions and the strength of the bent portion is ensured, a sufficient reinforcing function can be exerted on the inner box 20 and thus the heat insulating box 10.
In addition, the joint 32 between the bottom panel 22 and the side panel 23 has a lower strength than the other continuous parts and can be easily deformed. However, the joint 32 is sized from the corner 30A where stress is easily concentrated. Since it is provided at the position where only A escapes, deformation is avoided as much as possible. Accordingly, the occurrence of distortion in the heat insulating box 10 is reduced.

Since the joint 32 between the bottom panel 22 and the side panel 23 is formed at a position higher than the inner box 20, that is, the inner bottom surface of the heat insulation box 10, there is little possibility of being flooded from the joint 32 during operation. It is unnecessary to close the joint 32 with a caulking material, and the manufacturing process can be simplified. Moreover, the sanitary surface of the bottom surface in the warehouse can be improved.
In addition, since the joint 32 is hidden by the protective plate 60 that protects the cart 18 from hitting, it is excellent in appearance.

<Embodiment 2>
Next, a second embodiment of the present invention will be described with reference to FIGS. In the second embodiment, a reinforcing plate 70 is further mounted to reinforce the bottom surface of the inner box 20 of the heat insulating box 10 and the corners 30A on the bottom surface side.
In the following, the changed part will be mainly described, and parts having the same functions as those of the first embodiment are denoted by the same reference numerals, and redundant description will be omitted.

The reinforcing plate 70 is made of a metal plate such as a steel plate that is thicker than the panel, and includes four bottom reinforcing plates 70A and two side reinforcing plates 70B.
The bottom reinforcing plate 70 </ b> A includes a substrate 71 having a length dimension that is a little less than half the front dimension of the bottom surface of the inner box 20 and a width dimension that is half the depth dimension of the bottom surface, and at the outer end of the substrate 71. A rising plate 72 having substantially the same height as the rising portion 25 of the bottom panel 22 is integrally formed by bending it upward at a right angle. On the other hand, the side reinforcing plate 70B is slightly larger than the length dimension equal to the depth dimension of the side panel 23 and the height dimension of the upper portion from the notch portion 46A of the upward side portion 44A of the L-shaped reinforcing member 40. Has a height dimension.

Assembly is performed as follows.
The bottom reinforcing plate 70A is prepared by being paired with two L-shaped reinforcing members 40. Specifically, the bottom reinforcing plate 70A is lower than the notch 46 in the side portion 44A in which the rising plate 72 faces the two L-shaped reinforcing members 40 arranged at a predetermined interval. Further, the end of the board 71 on the side where the rising plate 72 is provided is applied to the mounting plate 42 of the side, and is fixed to the mounting plate 42 of the side portion 44B in the horizontal direction by welding.

When the inner box 20 is assembled by the four panels 21, 22, 23, the side reinforcing plate 70 </ b> B is applied to the positions just above the fastening portions of the flanges 26, 27 on both side surfaces, so Attach with. Next, each bottom reinforcing plate 70A integrally provided with the two L-shaped reinforcing members 40 is divided into four portions and applied from the outer bottom surface of the bottom panel 22 to the outer surface of the rising portion 25, and similarly double-sided. Affixed with tape or the like. At this time, the fastening portions of the flanges 26 and 27 are similarly fitted into the cutout portions 46 of the L-shaped reinforcing member 40 and released. Further, in the portion above the notch 46 in the upward side portion 44A of the L-shaped reinforcing member 40, since the mounting plate 42 is applied to the side reinforcing plate 70B, it may be fixed by spot welding.
After that, the reinforcing members 40A and 48 are attached on the ceiling side, and the connecting members 50A, 50B, and 50C are attached, whereby the manufacture of the inner box 20 is completed.

According to the second embodiment, the bottom reinforcing plate 70A formed by bending a single plate into an L shape is attached to the outer surface of the region extending from the bottom portion of the inner box 20 to the rising portion 25, particularly in the bottom panel 22. Therefore, the plate thickness is substantially increased at the corner portion 30A on the bottom surface side of the inner box 20, and the corner portion 30A is further strengthened.
Further, since the cart 18 and the worker enter and leave the heat insulating box 10, a large load acts on the bottom surface, but the bottom reinforcing plate 70 </ b> A is pasted over almost the entire bottom surface of the inner box 20. Also, the enhancement of the bottom surface is effectively achieved.

<Embodiment 3>
FIG. 12 shows Embodiment 3 of the present invention. In the third embodiment, an outward flange 75 is bent at a right angle on the upper edge of the rising plate 72 in the bottom reinforcing plate 70A of the second embodiment, and the lower edge of the side reinforcing plate 70B. Similarly, an outward flange 76 is formed by being bent at a right angle.
In manufacturing the inner box 20, the flange 27 on the lower edge of the side panel 23 and the flange 26 on the upper edge of the rising portion 25 of the bottom panel 22 are vertically stacked, while the lower edge of the side reinforcing plate 70 </ b> B. And the flange 75 on the upper edge of the rising plate 72 of the bottom reinforcing plate 70A are further overlapped from above and below, and the rivet 28 is driven over these four flanges 26, 27, 75, 76, that is, fastened together. Fixed.

Since the rivet 28 is driven after the four flanges 26, 27, 75, 76 are overlapped, the timing is determined after the flanges 26, 27 of the bottom panel 22 and the side panel 23 are brought into contact with each other. The side reinforcing plate 70B and the bottom reinforcing plate 70A to which the L-shaped reinforcing member 40 is fixed in advance are attached to predetermined positions, sandwiched between the flanges 76 and 75 as described above, and then the rivet 28 is driven. become.
Since the four flanges 26, 27, 75, and 76 need to be fitted and released, it is necessary to form a large notch 78 in the upward side portion 44A of the L-shaped reinforcing member 40.

In the first embodiment and the second embodiment, since the relatively thin flanges 26 and 27 are joined to each other on the side surface of the inner box 20 to form a joint 32, for example, the side surface of the inner box 20 is bent. When a strong force acts, there is a concern that the joint 32 may be bent.
In this respect, in the third embodiment, since both the flanges 26 and 27 are joined together with the flanges 75 and 76 at the ends of the reinforcing plates 70A and 70B by the rivets 28, the joint 32 can be strengthened. Even when a force that bends the side surface of the box 20 is applied, bending from the joint 32 is prevented.

<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, and further, within the scope not departing from the gist of the invention other than the following. Various modifications can be made.
(1) The means for fastening the flanges of the panels is not limited to rivets, and screws may be used, and they may be fixed by welding except for fastening together with the flange of the reinforcing plate shown in the third embodiment. .
(2) When the reinforcing plate shown in the second and third embodiments is provided, the side reinforcing plate may be removed and only the bottom reinforcing plate may be provided.
(3) On the ceiling side, the joint between the ceiling panel and the side panel may be configured to escape downward from the corner.
(4) The present invention is also applied to a heat-insulating box that is formed by assembling panels to form an inner box and an outer box, such as a heat-insulating box that constitutes the main body of the prefabricated refrigerator. It is possible to apply similarly.

Front view of the refrigerator according to Embodiment 1 of the present invention Side cross-sectional view Perspective view of inner box The exploded perspective view Cross section of bottom corner Its side view Bottom view Partial perspective view of inner box The exploded perspective view of the inner box concerning Embodiment 2 Cross section of bottom corner Its side view Sectional drawing of the corner | angular part by the side of the bottom face in the inner box of Embodiment 3. (A) Perspective view of inner box of conventional example, (B) Cross section of corner portion

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Thermal insulation box 20 ... Inner box 21 ... Ceiling panel 22 ... Bottom panel 23 ... Side panel 25 ... Stand-up part 26, 27 ... Flange 28 ... Rivet (fastener) 30A ... Corner part (on the bottom side) 32 ... Joint 40 ... L-shaped reinforcing member 44A ... (upward) side portion 46 ... notch portion 70A ... bottom side reinforcing plate 71 ... substrate 72 ... rise plate 75 ... flange 78 ... notch portion

Claims (3)

An inner box and an outer box are formed by connecting a plurality of panels in a box shape, and the inner box is incorporated in the outer box and a heat insulating material is filled between the two boxes. In a box, in which an L-shaped reinforcing member is mounted on the outer surface of the corner of the inner box,
At both ends of the bottom panel in the inner box, rising portions that wrap around to the side surface side of the inner box are formed by bending, and outward flanges are provided at the edges of the rising portion and the side panel that face each other. The flanges are formed so that the flanges are coupled to each other, and a side portion corresponding to the side surface side of the inner box in the L-shaped reinforcing member is formed with a notch for releasing the coupling portion of the flanges. Insulated box body. 2. The heat insulating box according to claim 1, wherein a reinforcing plate made of a single plate is bonded to an outer surface of a region extending from a bottom surface of the inner box to the rising portion of the bottom panel. The heat insulation box according to claim 2, wherein the both flanges are joined together by a fastener together with an end portion of the reinforcing plate.

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