Heat insulation door

Abstract

To reliably prevent water that has flown down on a front face of a heat insulation door from flowing around to a lower face of the heat insulation door even under an environment in which water is attached onto the front face of the heat insulation door.SOLUTION: A heat insulation door of the present invention includes: an outer shell body 23 formed in a hollow rectangular box-shape which is flat in a front-rear direction; and an insulation material 24 stored inside the outer shell body 23. The outer shell body 23 includes: a front wall 30 defining a front face of the outer shell body 23; a rear wall 31 defining a rear face of the outer shell body 23; a four-sides wall 32 defining upper-lower face and right-left face of the outer shell body 23; and a drainage wall 36 provided on a lower part of the front face of the outer shell body 23 and guiding received water to drop forward from the front wall 30. The drainage wall 36 is provided over right-left ends of the front wall 30 and is formed integrally with the front wall 30 so as to be inclined downward frontward from a lower end of the front wall 30.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a heat-insulating door for use in a storage facility. The heat-insulating door of the present invention is particularly applicable to a storage facility that is installed in an environment where raindrops (water) may adhere, such as under an outdoor eaves. [Background technology]

[0002] An insulated door that swings open and closes the access port of a storage chamber defined in a storage facility is configured by housing a heat insulating material inside a shell body made of a hollow box, and an insulated door of this configuration is disclosed, for example, in Patent Document 1. The insulated door of Patent Document 1 has a heat insulating material made of foamed resin foamed into the inside of the outer shell made of a hollow box. The outer shell is formed as a hollow box body that is flat from front to back, with exterior panels that define the front and top and bottom surfaces, a pair of caps that define the left and right surfaces of the outer shell, and an interior panel that defines the rear surface of the outer shell.

[0003] The insulated door of the present invention is equipped with a drainage structure that prevents water adhering to and flowing down its front surface from flowing around to the underside of the insulated door. A door equipped with such a structure is known, for example, from Patent Document 2. The door described in Patent Document 2 is a door for a distribution board installed outdoors, and a drainage plate is provided at the lower end of the front surface of the door, which is flat from front to back, to prevent water from flowing down the front surface into the space below the door. The drainage plate has a roughly crank-shaped cross section, and its upper vertical piece is fixed to the front surface of the door, making it integral with the door. Water that adheres to and flows down the front surface of the door is guided forward by the drainage plate and drips from the lower end of the drainage plate. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2012-122628 [Patent Document 2] Microfilm of Utility Model Application No. 51-73076 (Utility Model Application No. 52-163742) Summary of the Invention [Problem to be solved by the invention]

[0005] In outdoor storage facilities, water (raindrops) can adhere to the front of the insulated door, run down the front of the door, wrap around the bottom, and then travel down the underside of the door to the rear. The four edges of the rear of the insulated door are fitted with gaskets that seal the gap between the insulated door and the access opening, ensuring airtightness of the storage compartment. If water adheres to these gaskets, water may seep into the storage compartment through the access opening when the insulated door is opened, creating a hygiene problem, particularly in storage facilities used to store food. The above-mentioned water seepage to the underside of the insulated door can be prevented by providing the insulated door with a draining structure, as described in Patent Document 2. However, the draining plate in Patent Document 2 is a separate component from the door and is fixed to the door, so a gap inevitably forms between the fixed portion of the door and the draining plate, i.e., between the front of the door and the vertical piece of the draining plate. If a gap forms between the two (the door and the draining plate), water may seep through the gap and find its way to the underside of the door.

[0006] To reliably prevent water flowing down the front surface of a heat-insulating door from flowing around to the underside of the door even in an environment where water adheres to the front surface of the heat-insulating door. [Means for solving the problem]

[0007] The insulated door according to the present invention comprises a shell body 23 in the shape of a hollow rectangular box that is flat from front to back, and a thermal insulator 24 housed inside the shell body 23. The shell body 23 includes a front wall 30 that defines the front surface of the shell body 23, a rear wall 31 that defines the rear surface of the shell body 23, four peripheral walls 32 that define the top, bottom, left, and right surfaces of the shell body 23, and a drip wall 36 that is provided at the lower front surface of the shell body 23 and guides received water forward beyond the front wall 30 to drip down. The drip wall 36 is characterized in that it is provided across the left and right ends of the front wall 30 and is formed integrally with the front wall 30 so as to be continuous with the lower end of the front wall 30 and slope downward toward the front.

[0008] The four peripheral walls 32 have a lower wall 34 that defines the lower surface of the outer shell body 23. A recessed corner-shaped front liquid reservoir 43 is provided at the lower front corner of the outer shell body 23 formed by the front end of the lower wall 34 and the lower end of the front wall 30.

[0009] The four peripheral walls 32 have a lower wall 34 that defines the lower surface of the outer shell body 23. A recessed corner-shaped rear liquid reservoir 44 is provided at the lower rear corner of the outer shell body 23 formed by the rear end of the lower wall 34 and the lower end of the rear wall 31.

[0010] The four peripheral walls 32 have an upper wall 33 that defines the upper surface of the outer shell body 23, and the upper wall 33 is provided with a flow-down wall 37 that causes water adhering to the upper surface of the outer shell body 23 to flow down toward the front wall 30. The flow-down wall 37 of the upper wall 33 is formed integrally with the front wall 30 so as to be continuous with the upper end of the front wall 30 and slope upward toward the rear. [Effects of the Invention]

[0011] As in the present invention, when the outer shell body 23 of the insulated door 5 is configured to include a front wall 30 that defines the front surface of the outer shell body 23, a rear wall 31 that defines the rear surface of the outer shell body 23, four peripheral walls 32 that define the top, bottom, left, and right surfaces of the outer shell body 23, and a drip wall 36 that is provided at the lower front surface of the outer shell body 23 and guides received water forward of the front wall 30 to drip, the drip wall 36 can guide water that adheres to and flows down the front wall 30 and cause it to drip forward of the front wall 30, thereby preventing the water from flowing around to the underside of the insulated door 5. Furthermore, when the drip wall 36 is provided across the left and right ends of the front wall 30, the drip wall 36 can guide water across the entire width of the insulated door 5 in the left-right direction to drip. In addition, if the drip wall 36 is formed integrally with the front wall 30 so as to slope downward toward the front, continuing from the lower end of the front wall 30, a gap will not be formed between the door and the drip board as in conventional drip structures, and water will not find its way around to the underside of the insulated door 5 through the gap. As described above, the insulated door of the present invention can reliably prevent water that has flowed down the front surface of the insulated door 5 from getting around to the underside of the insulated door 5.

[0012] The four peripheral walls 32 have a lower wall 34 that defines the underside of the outer shell body 23, and a recessed corner-shaped front liquid reservoir 43 is provided at the lower front corner of the outer shell body 23 formed by the front end of the lower wall 34 and the lower end of the front wall 30.Water that adheres to the underside of the insulated door 5 due to splashes or the like and flows down to the lower front corner of the insulated door 5, or water that adheres to the lower front corner, can be held in the recessed corner-shaped front liquid reservoir 43 by the surface tension of the liquid, thereby preventing water from flowing freely down the underside of the insulated door 5.

[0013] The four peripheral walls 32 have a lower wall 34 that defines the underside of the outer shell body 23, and a recessed corner-shaped rear liquid reservoir 44 is provided at the lower rear corner of the outer shell body 23 formed by the rear end of the lower wall 34 and the lower end of the rear wall 31.Water that adheres to the underside of the insulated door 5 due to splashes or the like and flows down to the lower rear corner of the insulated door 5, or water that adheres to the lower rear corner, can be held in the recessed corner-shaped rear liquid reservoir 44 by the surface tension of the liquid, thereby preventing water from flowing freely down the underside of the insulated door 5.

[0014] The four peripheral walls 32 have an upper wall 33 that defines the upper surface of the outer shell body 23, and if the upper wall 33 is equipped with a flow-down wall 37 that allows water adhering to the upper surface of the outer shell body 23 to flow down toward the front wall 30, the flow-down wall 37 actively allows water adhering to the upper wall 33 to flow down toward the front surface of the outer shell body 23, preventing water from accumulating on the upper surface of the insulated door 5 and preventing accumulated water from flowing toward the rear side of the insulated door 5. In addition, if the flow-down wall 37 of the upper wall 33 is formed integrally with the front wall 30 so as to be continuous with the upper end of the front wall 30 and slope upward toward the rear, water adhering to the upper surface of the insulated door 5 can be smoothly flowed down toward the front surface of the insulated door 5 by the flow-down wall 37. [Brief explanation of the drawings]

[0015] [Figure 1] 2 is a vertical cross-sectional side view showing a storage facility to which a heat-insulating door according to an embodiment of the present invention is applied, and is a cross-sectional view taken along line AA in FIG. [Figure 2] FIG. [Figure 3] FIG. 3 is a cross-sectional view taken along the line BB in FIG. [Figure 4]FIG. 2 is an exploded perspective view of an outer shell that constitutes the insulating door. [Figure 5] FIG. 2 is a vertical cross-sectional side view showing the upper and lower parts of the insulating door. DETAILED DESCRIPTION OF THE INVENTION

[0016] (Embodiment) Figures 1 to 5 show an embodiment in which the insulated door of the present invention is applied to a refrigerated locker. In this embodiment, the terms front, back, left, right, and top and bottom refer to the crossed arrows shown in Figures 1 and 2 and the symbols near each arrow. As shown in Figure 2, refrigerated locker (storage) 1 includes a main case 2 in the shape of a vertically long rectangular box with a front opening, a total of four storage compartments (storage compartments) 3 (3a to 3d) defined inside the main case 2, and insulated doors 5 (5a to 5d) provided on the front side of the main case 2 to open and close the access openings 4 (4a to 4d) of each storage compartment 3. The main case 2 is an insulated box body consisting of inner and outer boxes with insulating material filled between the boxes.

[0017] A machine room 7 is defined below the main body case 2. A machine room panel 8 is detachably attached to the front of the machine room 7, and a group of ventilation openings is formed in the panel 8. An evaporator 9, which constitutes a refrigeration cycle, and a circulation fan 10, which circulates air in the storage room 3, are installed on the inner surface of the ceiling wall of the main body case 2. The machine room 7 is also equipped with a compressor 11 and a condenser 12, which together with the evaporator 9 constitute a refrigeration cycle, and a condenser fan 13, which supplies heat exchange air to the condenser 12 and air-cools the compressor 11. A decorative panel 14 is attached to the upper end of the front of the main body case 2. When all the insulating doors 5 are closed, the decorative panel 14, the insulating doors 5a to 5d, and the machine room panel 8 are configured to be approximately flush in a side view.

[0018] 1 and 2, a total of three horizontal bars 17 are fixed to the main case 2 so as to cross the front opening in the left-right direction. Each horizontal bar 17 is an insulator consisting of a hollow rectangular cylinder extending left and right and filled with insulating material, and is arranged so as to evenly divide the front opening of the main case 2 in the up-down direction. The horizontal bars 17, together with the main case 2, define the access opening 4, which includes an access opening 4a(4) defined by the top wall of the main case 2 and the upper horizontal bar 17, an access opening 4b(4) defined by the upper horizontal bar 17 and the middle horizontal bar 17, an access opening 4c(4) defined by the middle horizontal bar 17 and the lower horizontal bar 17, and an access opening 4d(4) defined by the lower horizontal bar 17 and the bottom wall of the main case 2. A lattice shelf 18 is disposed behind each horizontal rail 17, and the inside of the main body case 2 is divided by the lattice shelves 18 into four storage chambers 3a to 3d.

[0019] As shown in Fig. 3, each insulating door 5 is configured to be swingable by a hinge shaft 19 installed on the front surface of the left wall of the main body case 2. In the closed position, the insulating door 5 is maintained in position by a locking device 20 installed on the front surface of the right wall of the main body case 2, and can be swung open around the hinge shaft 19 by unlocking the locking device 20 with an operating unit (not shown).

[0020] 1 and 3, the insulated door 5 is composed of a shell 23 in the shape of a hollow rectangular box that is flat at the front and rear, a heat insulating material 24 housed inside the shell 23, and a packing 25 that fits tightly around the outlet 4. The packing 25 is made of a magnetic packing that is magnetically attracted to the main case 2 and crosspiece 17, and seals the gap between the insulated door 5 and the outlet 4 to ensure airtightness of the storage chamber 3. On the rear surface of the shell 23, a hinge block 26 that is pivotally supported by the hinge shaft 19 is provided on the left side, and a striker 27 that is held by the locking device 20 is provided on the right side.

[0021] As shown in Figure 4, the outer shell 23 is composed of a front wall 30 that defines the front surface, a rear wall 31 that defines the rear surface, and four peripheral walls 32 that define the top, bottom, left, and right surfaces. The four peripheral walls 32 are composed of an upper wall 33 that defines the top surface, a lower wall 34 that defines the bottom surface, and a pair of side walls 35 that define the left and right surfaces. The upper wall 33 is formed integrally with the front wall 30. The front wall 30, upper wall 33, lower wall 34, and each side wall 35 are made of metal molded products using stainless steel plate, and the rear wall 31 is made of a resin molded product.

[0022] The insulated door 5 of this embodiment is provided with a drain structure that prevents water adhering to and flowing down its front surface from flowing around to the underside of the insulated door 5. Specifically, as shown in FIG. 5 , a drain wall 36 for draining water is provided at the lower front surface of the outer shell body 23. The drain wall 36 is made of a flat, inclined piece that slopes downward at 45 degrees from the lower end of the front wall 30 toward the front, and guides captured water forward of the front wall 30 to drip down. The tip of the drain wall 36 is located forward of the front wall 30 at approximately the same height as the outer surface of the lower wall 34. The drain wall 36 is provided across the left and right ends of the front wall 30 and is formed integrally with the front wall 30, continuing from the lower end of the front wall 30.

[0023] The upper wall 33 is provided with a flow-down wall 37 that allows water adhering to the upper surface of the insulated door 5 (the upper wall 33 of the outer shell body 23) to flow down toward the front wall 30. Specifically, the upper wall 33 is composed of a horizontal wall 38 provided on the rear wall 31 side and a flow-down wall 37 provided in front of the horizontal wall 38 and sloping downward toward the front, and the flow-down wall 37 is formed integrally with the front wall 30, continuing from the upper end of the front wall 30. In other words, the flow-down wall 37 is formed integrally with the front wall 30 so as to be continuous with the upper end of the front wall 30 and slope upward toward the rear. In this embodiment, the upper wall 33 and the drip wall 36 are formed integrally with the front wall 30 by bending (folding) a stainless steel plate cut into a predetermined shape.

[0024] The outer shell body 23 is formed into a hollow rectangular box shape by first joining the lower wall 34 and each side wall 35 to the front wall 30, and then joining the rear wall 31 to the upper wall 33, lower wall 34, and each side wall 35 (four peripheral walls 32). As shown in Figures 3 and 5, in order to join adjacent walls, the upper wall 33 is formed by bending its rear edge downward to provide a joining wall 33a for joining with the rear wall 31. The lower wall 34 is also formed by bending its front edge upward to provide a front joining wall 34a for joining with the front wall 30, and a rear joining wall 34b for joining with the rear wall 31 by bending its rear edge upward. Each side wall 35 is formed by bending its front edge inward in the left-right direction to form a front joining wall 35a for joining with the front wall 30, and by bending its rear edge inward in the left-right direction to form a rear joining wall 35b for joining with the rear wall 31.

[0025] The front wall 30 and the lower wall 34 are joined together by tightly welding a front joining wall 34a to the lower end of the rear surface of the front wall 30. The front wall 30 and each side wall 35 are joined together by tightly welding front joining walls 35a to the left and right rear surfaces of the front wall 30. The upper wall 33, the lower wall 34, and each side wall 35 are joined together with the rear wall 31 by tightly adhering the four peripheral edges of the rear surface of the rear wall 31 to the joining wall 33a of the upper wall 33, the joining wall 34b on the rear side of the lower wall 34, and the joining wall 35b on the rear side of each side wall 35. The rear wall 31 has a bulging portion 41 that bulges rearward in the central portion of the panel surface excluding the four peripheral edges, and is hat-shaped in both longitudinal and transverse cross sections. The front surface of the rear wall 31 around the outer periphery of the bulging portion 41 is joined to the joining walls 33a, 34b, and 35b. The magnet packing 25 is fixed to the rear surface of the rear wall 31 around the bulging portion 41 .

[0026] 4, reference numeral 42 denotes a foam resin filling port formed in the bulge 41 of the rear wall 31. Liquid resin is injected through the filling port 42 into the shell body 23, which is made up of the integrally joined walls 30, 31, and 32, and foamed to fill the inside of the shell body 23 with the insulating material 24. After filling with the insulating material 24, the filling port 42 is sealed with adhesive tape or the like.

[0027] A front liquid reservoir 43 having an inwardly recessed corner shape is provided at the boundary between the bottom wall 34 and the front wall 30, i.e., at the front lower corner of the insulated door 5 formed by the front end of the bottom wall 34 and the lower end of the front wall 30. The front liquid reservoir 43 is a space defined on the rear side of the drip wall 36, and is formed by joining the lower end of the front wall 30 to the front connecting wall 34a above the lower surface of the bottom wall 34. Similarly, a rear liquid reservoir 44 having an inwardly recessed corner shape is provided at the boundary between the bottom wall 34 and the rear wall 31, i.e., at the rear lower corner of the insulated door 5 formed by the rear end of the bottom wall 34 and the lower end of the rear wall 31. The rear liquid reservoir 44 is formed by joining the lower end of the rear wall 31 to the rear connecting wall 34b above the lower surface of the bottom wall 34. The inside corner-shaped front and rear liquid reservoirs 43 and 44 can retain water by utilizing the surface tension of water, and water adhering to the front lower corner of the insulating door 5 is retained in the front liquid reservoir 43, and water adhering to the rear lower corner of the insulating door 5 is retained in the rear liquid reservoir 44.

[0028] As shown in Figure 3, the insulated door 5 of this embodiment has left and right overhangs 45 extending outward from each side wall 35, with the front wall 30, bottom wall 34, and drip edge 36 each having a width greater than the width of the rear wall 31. The hinge block 26 described above is provided on the rear surface of the left overhang 45, and the striker 27 is provided on the rear surface of the right overhang 45. The bottom wall 34 constituting the right overhang 45 has a smaller front-to-rear dimension than the bottom wall 34 constituting the left overhang 45 to prevent interference with the locking device 20. The front wall 30 has cover walls 46 at the tip of each overhang 45 to prevent the rear surface of the front wall 30 from being viewed from the side.

[0029] As described above, in this embodiment, the outer shell body 23 of the insulated door 5 is configured to include the front wall 30 that defines the front surface of the outer shell body 23, the rear wall 31 that defines the rear surface of the outer shell body 23, the four peripheral walls 32 that define the top, bottom, left, and right surfaces of the outer shell body 23, and the drip wall 36 that is provided on the lower front surface of the outer shell body 23 and guides received water forward of the front wall 30 to drip. This allows water that adheres to and flows down the front wall 30 to be guided by the drip wall 36 and to drip forward of the front wall 30, thereby preventing the water from flowing around to the underside of the insulated door 5. Furthermore, since the drip wall 36 is provided across the left and right ends of the front wall 30, the drip wall 36 can guide water to drip across the entire width of the insulated door 5 in the left-right direction. In addition, since the drip wall 36 is formed integrally with the front wall 30 so as to be continuous with the lower end of the front wall 30 and slope downward toward the front, a gap is not formed between the door and the drip board as in conventional drip structures, and water can be prevented from flowing around to the underside of the insulated door 5 through the gap. As described above, the insulated door 5 of this embodiment can reliably prevent water that has flowed down the front surface of the insulated door 5 from flowing around to the underside of the insulated door 5.

[0030] A recessed corner-shaped front liquid reservoir 43 is provided at the lower front corner of the outer shell body 23 formed by the front end of the lower wall 34 and the lower end of the front wall 30.This means that water that adheres to the underside of the insulated door 5 due to splashes or the like and flows down to the lower front corner of the insulated door 5, or water that adheres to the lower front corner, is held in the recessed corner-shaped front liquid reservoir 43 by the surface tension of the liquid, preventing the water from flowing freely down the underside of the insulated door 5.

[0031] An indented rear liquid reservoir 44 is provided at the rear lower corner of the outer shell body 23 formed by the rear end of the lower wall 34 and the lower end of the rear wall 31.This means that water that adheres to the underside of the insulated door 5 due to splashes or the like and flows down to the rear lower corner of the insulated door 5, or water that adheres to the rear lower corner, is held in the indented rear liquid reservoir 44 by the surface tension of the liquid, preventing the water from flowing freely down the underside of the insulated door 5.

[0032] The upper wall 33 is provided with the flow-down wall 37 that causes water adhering to the upper surface of the outer shell body 23 to flow down toward the front wall 30, so that the flow-down wall 37 actively causes water adhering to the upper wall 33 to flow down toward the front surface of the outer shell body 23, preventing water from accumulating on the upper surface of the insulated door 5 and preventing accumulated water from flowing toward the rear side of the insulated door 5. In addition, the flow-down wall 37 is formed integrally with the front wall 30 so as to be continuous with the upper end of the front wall 30 and slope upward toward the rear, so that water adhering to the upper surface of the insulated door 5 can be smoothly caused to flow down toward the front surface of the insulated door 5 by the flow-down wall 37.

[0033] In addition to the above, the inclination angle of the drain wall 36 may be greater or less than 45 degrees. The shape of the drain wall 36 may be formed as a curved piece other than an inclined piece, as long as the tip of the drain wall 36 is positioned forward of the front wall 30. A hanging piece hanging downward from the tip of the drain wall 36 may be provided. The drain wall 36 may be formed by bending, or the drain wall 36 may be joined to the lower end of the front wall 30 by welding to integrate the two (front wall 30 and drain wall 36). The upper wall 33 may be entirely composed of the flow-down wall 37. Specific examples of the storage cabinet of the present invention include a refrigerator, a freezer, a cooling cabinet, a cold storage cabinet, and a warming cabinet. [Explanation of symbols]

[0034] 23 Exoskeleton 24 Insulation 30 Front wall 31 Back wall 32 Four walls 33 Upper Wall 34 Lower wall 36 Water drainage wall 37 Flowing wall 43 Front reservoir 44 Rear fluid reservoir

Claims

1. The vehicle is provided with a flat, hollow, rectangular box-shaped outer shell (23) at the front and rear, and a heat insulating material (24) housed inside the outer shell (23), The outer shell body (23) includes a front wall (30) that defines the front surface of the outer shell body (23), a rear wall (31) that defines the rear surface of the outer shell body (23), four peripheral walls (32) that define the upper and lower surfaces and the left and right surfaces of the outer shell body (23), and a drain wall (36) that is provided at the lower front surface of the outer shell body (23) and guides the received water forward of the front wall (30) to drip it. The heat-insulating door is characterized in that a drip wall (36) is provided across the left and right ends of the front wall (30) and is formed integrally with the front wall (30) so as to be continuous with the lower end of the front wall (30) and slope downward toward the front.

2. The four peripheral walls (32) have a lower wall (34) that defines the lower surface of the outer shell body (23), 2. The insulated door according to claim 1, wherein a recessed corner-shaped front liquid reservoir (43) is provided at the front lower corner of the outer shell (23) formed by the front end of the lower wall (34) and the lower end of the front wall (30).

3. The four peripheral walls (32) have a lower wall (34) that defines the lower surface of the outer shell body (23), 2. The insulated door according to claim 1, wherein a recessed corner-shaped rear liquid reservoir (44) is provided at the rear lower corner of the outer shell (23) formed by the rear end of the lower wall (34) and the lower end of the rear wall (31).

4. The four peripheral walls (32) have an upper wall (33) that defines the upper surface of the outer shell body (23), and the upper wall (33) has a flow-down wall (37) that allows water adhering to the upper surface of the outer shell body (23) to flow down toward the front wall (30); 4. An insulated door according to claim 1, wherein the flow-down wall (37) of the upper wall (33) is integrally formed with the front wall (30) so as to be continuous with the upper end of the front wall (30) and slope upward toward the rear.

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