Insulated door, opening and closing device equipped with this insulated door, and method for manufacturing this insulated door

Abstract

To obtain a hygienic and high-strength structure. [Solution] The insulated door comprises a door body 10a with a hollow plate-like interior and an insulating foam 14 filled inside the door body 10a. The door body 10a is composed of multiple members, which are joined together by the insulating foam 14, and no wood is provided inside the door body 10a.

Description

Technical Field

[0001] The present invention relates to a heat insulating door configured to open and close an opening, an opening and closing apparatus provided with the heat insulating door, and a method for manufacturing the heat insulating door.

Background Art

[0002] Refrigerators and freezers in which the internal space is temperature-controlled are provided with a heat insulating door that opens and closes in a sliding door form or a hinged door form, an opening frame that is opened and closed by the heat insulating door, an elastic airtight member that airtightly seals the gap between the heat insulating door and the opening frame, and the like, and a heat insulating material is provided inside the heat insulating door and the opening frame to maintain good heat insulation performance and the like. Patent Document 1 shows an example of related prior art. In particular, in large-sized refrigerators and freezers that store a large amount of food and the like, high strength is required in addition to heat insulation performance for large and heavy heat insulating doors, opening frames, and the like. Therefore, in some cases, in addition to the heat insulating material, wooden aggregates that have relatively good heat insulation properties and high strength are provided inside such large heat insulating doors and opening frames.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, according to the above-described prior art, there is a risk that the wooden aggregate provided inside the heat insulating door or the opening frame absorbs moisture and increases in weight, leading to insufficient strength, or the moisture-absorbed wooden aggregate becomes a cause of bacterial propagation.

Means for Solving the Problems

[0005] In view of such problems, one aspect of the present invention has the following configuration. An insulated door comprising a door body with a hollow plate-like structure inside, and an insulating foam filled inside the door body, wherein the door body is composed of multiple members, and the multiple members are joined together by the insulating foam. [Effects of the Invention]

[0006] As described above, the present invention is configured to provide a hygienic and highly durable structure. [Brief explanation of the drawing]

[0007] [Figure 1] This is a front view showing an example of an opening and closing device (single sliding door) equipped with an insulated door according to the present invention. [Figure 2] This is a disassembled perspective view of the same switchgear. [Figure 3] This is a front view showing an example of a door panel, with a portion cut out to reveal the internal structure. [Figure 4] This is a cross-sectional view along the line (IV)-(IV) in Figure 3. [Figure 5] Figure 3 is a cross-sectional view along the line (V)-(V), where the dashed line indicates the door components before joining. [Figure 6] This is a magnified view of the main part of Figure 5. [Figure 7] This is a perspective view showing how the inner plate-shaped member is fastened to the outer plate-shaped member of the storage unit. [Figure 8] Another example of an opening and closing device equipped with an insulated door according to the present invention (a front view showing a double sliding door). [Figure 9] This is a front view showing another example (a single-leaf hinged door) of an opening and closing device equipped with an insulated door according to the present invention. [Figure 10] This is a front view showing another example (double-hinged door) of an opening and closing device equipped with an insulated door according to the present invention. [Figure 11] This is a front view showing another example (up and down sliding door) of an opening and closing device equipped with an insulated door according to the present invention. [Modes for carrying out the invention]

[0008] Next, embodiments according to the present invention will be described in detail based on the drawings.

[0009] <Detailed Embodiment> Figure 1 and Figure 2 show an example of an opening / closing device provided with a heat-insulating door according to the present invention. This opening / closing device 1 is provided at an opening (not shown) in a wall portion of a warehouse or the like (e.g., a refrigerated warehouse, a frozen warehouse, etc.) whose internal space is temperature-controlled. In the drawings, "warehouse inner side" means the inner side of the warehouse or the like, and "warehouse outer side" means the outer side of the warehouse or the like.

[0010] This opening / closing device 1 constitutes a single-sliding type hanging sliding door, comprising: a heat-insulating door 10 that performs opening and closing operations; an opening frame 20 that is opened and closed by the heat-insulating door 10; a cover piece 30 connected to the opening frame 20 and covering the prospective surface of the opening (not shown); and a transom 40 that suspends the heat-insulating door 10 on the upper side thereof to move the heat-insulating door 10 in the opening / closing direction.

[0011] The heat-insulating door 10 includes a door main body 10a having a hollow interior formed by a plurality of members, columnar support members 13 supporting the door main body 10a from the inner side, and a heat-insulating foam 14, and no wood is provided inside the door main body 10a.

[0012] The door main body 10a includes a warehouse outer side plate-shaped member 11, and a warehouse inner side plate-shaped member 12 spaced apart from the warehouse outer side plate-shaped member (see Figure 5).

[0013] The warehouse outer side plate-shaped member 11 is configured by connecting two or more (three according to the example in Figure 5) plate materials 11a, 11b, 11c arranged in the door width direction (the lateral width direction of the heat-insulating door 10) with their end portions facing each other. Similarly, the warehouse inner side plate-shaped member 12 is also configured by connecting two or more plate materials 12a, 12b, 12c arranged in the door width direction with their end portions facing each other. These warehouse outer side plate-shaped member 11 and warehouse inner side plate-shaped member 12 are formed of a metal plate material with good corrosion resistance and strength properties, such as a stainless steel material.

[0014] The plate member 11a is the plate member located on the rearmost door tail side. This plate member 11a has a flat plate portion 11a1 that is rectangular in plan view, a connecting curved portion 11a2 located on one side of the flat plate portion 11a1 on the door tail side, and a protrusion 11a3 located on one side of the flat plate portion 11a1 on the door leading side (see Figure 5). Furthermore, this plate member 11a also has connecting curved portions 11a2 on the two sides on both sides in the vertical direction (see Figure 4 and Figure 7).

[0015] Each connecting curved portion 11a2 protrudes from the end of the flat plate portion 11a1 toward the inner side of the door body by approximately the thickness of the heat insulating door 10, and further protrudes from its protruding end toward the inner side of the door body by a predetermined amount, so as to be configured in a substantially U-shaped cross section (see Figure 4, Figure 5 and Figure 8).

[0016] The protrusion 11a3 protrudes from the end of the flat plate portion 11a1 on the door leading side toward the inside of the door body by a predetermined amount, and further protrudes from its protruding end toward the door tail side by a predetermined amount, so as to be configured in a substantially U-shaped cross section. The dimension by which this protrusion 11a3 protrudes from the flat plate portion 11a1 is smaller than the dimension by which the connecting curved portion 11a2 protrudes from the flat plate portion 11a1 (approximately the thickness of the heat insulating door 10) (see Figure 5).

[0017] The plate member 11b is the plate member located on the center side among the three plate members arranged side by side in the door width direction on the outdoor side of the storage compartment. This plate member 11b has a flat plate portion 11b1 that is rectangular in plan view, and protrusions 11b3 that protrude from the ends of the flat plate portion 11b1 on the door tail side and the door leading side toward the inner side of the door body by a predetermined amount (see Figure 5). In addition, this plate member 11b has connecting curved portions 11b2 (see Figure 7) on the two sides on both sides in the vertical direction.

[0018] The connecting curved portion 11b2 has the same shape as the above-described connecting curved portion 11a2. The protrusion 11b3 on the door tail side has a cross-sectional shape that is line-symmetric (left-right reversed in Figure 5) to the above-described protrusion 11a3.

[0019] The plate member 11c is the plate member located on the rearmost door leading side. This plate material 11c has a rectangular flat portion 11c1 in plan view, a connecting curved portion 11c2 located on one side of the flat portion 11c1 on the door-side, and a protruding portion 11c3 located on one side of the flat portion 11c1 on the door-side (see Figure 5). Furthermore, this plate material 11c also has connecting curved portions (not shown) on both sides in the vertical direction that are the same shape as the connecting curved portion 11c2. The connecting curved portion 11c2 and the protruding portion 11c3 have the same shape as the connecting curved portion 11a2 and the protruding portion 11b3 described above, respectively.

[0020] Board material 12a is the board material located on the inside of the storage compartment, closest to the door end. This plate material 12a has a rectangular flat portion 12a1 in plan view and a projection 12a3 that protrudes inward from one side of the flat portion 12a1 on the door edge side (see Figure 5). The projection 12a3 has a cross-sectional shape that is symmetrical to the projection 11a3 described above (upside down in Figure 5).

[0021] Board 12b is the central board among the three boards arranged in the door width direction on the inside of the storage unit. This plate material 12b has a rectangular flat portion 12b1 in plan view, and protrusions 12b3 that project a predetermined amount into the inside of the door body from the door-end and door-front ends of the flat portion 12b1 (see Figure 5). The projection 12b3 on the door-end side has a cross-sectional shape that is symmetrical to the projection 12a3 described above (in the opposite direction in Figure 5). The projection 12b3 on the door-end side has the same shape as the projection 12a3 described above.

[0022] Board 12c is the board located on the inside of the storage compartment, closest to the door edge. This plate material 12c has a rectangular flat portion 12c1 in plan view, a curved portion 12c2 located on one side of the flat portion 12c1 on the door-side, and a protruding portion 12c3 located on one side of the flat portion 12c1 on the door-side (see Figure 5). The curved portion 12c2 is a plate-like part that protrudes approximately the thickness of the door from the door-side end of the plate material 12c toward the inside of the door body. The end side of the plate material 12c, including this curved portion 12c2, has an L-shaped cross-section (see Figure 5). The projection 12c3 has the same shape as the projection 11b3 described above.

[0023] The protrusion 11a3 of the plate material 11a and the protrusion 11b3 on the door-end side of the plate material 11b are bent in opposite directions at their protruding ends. These protrusions 11a3 and 11b3 are covered by the flexible tape 11d (see Figure 6).

[0024] The flexible tape 11d is a flexible adhesive tape that adheres to the protrusions 11a3 and 12b3 in the direction of the door width, penetrates into the concave cross-sectional portion of each protrusion 11a3 and 12b3, and adheres to the inner side surfaces of each plate material 11a and 11b (see Figure 6). This flexible tape 11d is continuous over substantially the entire length in the vertical direction of the protrusions 11a3 and 11b3.

[0025] Similarly, the projection 11b3 on the door-side of the board 11b and the projection 11c3 on the door-side of the board 11c, the projection 12a3 on the board 12a and the projection 12b3 on the door-side of the board 12b, and the projection 12b3 on the door-side of the board 12b and the projection 12c3 on the door-side of the board 12c are all bent in opposite directions at their protruding ends (see Figure 5) and covered with the flexible tape 11d.

[0026] In the above-described configuration, the opposing ends of two adjacent plates 11a and 11b on the outer plate-shaped member 11 are offset from the opposing ends of two adjacent plates 12a and 12b on the inner plate-shaped member 12 in one direction in the direction of alignment of the two adjacent plates (in the illustrated example, one direction in the door width direction, which is to the left). In other words, the protrusions 11a3 and 11b3 of two adjacent plates 11a and 11b are offset in one direction (to the left, according to Figure 6) relative to the protrusions 12a3 and 12b3 of two adjacent plates 12a and 12b.

[0027] Similarly, the opposing ends of two adjacent plate members 11b and 11c on the outer plate-like member 11 are offset in one direction in the direction of alignment of the two adjacent plate members, relative to the opposing ends of two adjacent plate members 12b and 12c on the inner plate-like member 12.

[0028] Furthermore, one of the outer plate-shaped member 11 and the inner plate-shaped member 12 is fastened to the other on both sides, straddling the opposing ends. More specifically, as illustrated in Figure 7, the plate material 12a constituting the interior plate-shaped member 12 straddles the opposing ends of the plate materials 11a and 11b (more specifically, the connecting curved portion 11a2 and the connecting curved portion 11b2) constituting the exterior plate-shaped member 11 in the direction of the door width. The plate material 12a is then overlapped and fastened to the connecting curved portion 11a2 and the connecting curved portion 11b2, respectively, by fasteners 10p. The fastener 10p is a rivet in the illustrated example, but it can also be a screw, bolt, or the like.

[0029] Furthermore, the outer plate-shaped member 11 and the inner plate-shaped member 12 are reinforced at their upper and lower ends by a structural member 15 (see Figure 4) sandwiched between them.

[0030] Furthermore, the door body 10a of the above configuration is provided with a filling hole 10a1 for filling with the heat insulating foam 14 described later, and an outlet hole 10a2 for allowing a portion of the filled heat insulating foam 14 to flow out to the outside.

[0031] The filling hole 10a1 is located approximately in the center in the door width direction on one end face in the vertical direction of the door body 10a (the lower end face in the example shown in Figure 3), and penetrates the lower end wall of the door body 10a (the outer plate-like member 11 and the structural members 15, etc.) (see Figure 4). Furthermore, four outflow holes 10a2 are provided so as to be located near the four corners of the door body 10a, and as shown in the example in Figure 3, they are provided on the left and right sides of the upper end and on the left and right sides of the lower end of the door body 10a, respectively.

[0032] Furthermore, within the door body 10a of the above configuration, a columnar support member 13 and a heat-insulating foam 14 made of substantially the same material are provided.

[0033] Multiple columnar support members 13 are provided (four in the illustrated example) at appropriate intervals near the center of the door body 10a in the width direction and vertical direction. Each columnar support member 13 has one end in contact with the outer plate-shaped member 11 and the other end in contact with the inner plate-shaped member 12, thereby supporting the space between the outer plate-shaped member 11 and the inner plate-shaped member 12.

[0034] Although the columnar support member 13 is formed in the shape of a rectangular column according to the illustrated example, it may also be a columnar shape other than that shown, such as a cylindrical shape. This columnar support member 13 is bonded and fixed to the outer plate-shaped member 11 and the inner plate-shaped member 12 of the storage unit via adhesive (including double-sided tape or adhesive). Alternatively, it can be fixed by being sandwiched between the outer plate-shaped member 11 and the inner plate-shaped member 12 without being bonded.

[0035] The heat-insulating foam 14 is obtained by filling the door body 10a with a fluid heat-insulating foam resin (for example, foamed urethane resin, etc.) and allowing it to harden. This heat-insulating foam 14, through its adhesive strength, joins the adjacent outer panel-shaped member 11 and inner panel-shaped member 12 in the door thickness direction.

[0036] Furthermore, during the manufacturing stages of the outer plate-shaped member 11 and the inner plate-shaped member 12, an adhesion promoter (sometimes called a primer) is applied to the inner surface of the outer plate-shaped member 11 and the inner plate-shaped member 12 to improve the adhesion between the columnar support member 13 and the heat insulating foam 14.

[0037] Furthermore, the insulating foam 14 spans and covers adjacent protrusions 11a3, 11b3, adjacent protrusions 11b3, 11c3, adjacent protrusions 12a3, 12b3, and adjacent protrusions 12b3, 12c3, thereby joining adjacent plates 11a, 11b, adjacent plates 11b, 11c, adjacent plates 12a, 12b, and adjacent plates 12b, 12c, respectively. To explain in more detail, the adjacent plate material is covered with the flexible tape 11d as described above, and the heat insulating foam 14 is filled so as to cover these protrusions and the flexible tape 11d.

[0038] Furthermore, the heat-insulating foam 14 is filled to cover the circumferential surfaces of each columnar support member 13, thereby reinforcing the columnar support members 13.

[0039] Here, we will explain the procedure (method) for filling the door body 10a with the insulating foam 14. First, the door body 10a containing the columnar support member 13 is heated to an appropriate temperature, and a fluid, heat-insulating foam 14 is filled into the door body 10a through the filling hole 10a1. After this, a portion of the heat-insulating foam 14 flows out through the outlet hole 10a2.

[0040] Then, when the insulating foam 14 has flowed out of all (four according to the diagram) of the outflow holes 10a2, the filling of the insulating foam 14 is stopped.

[0041] According to these procedures, the insulating foam 14 can be quickly filled around each columnar support member 13 and into every corner of the door body 10a while conforming to the inner surface of the heated door body 10a.

[0042] Furthermore, as shown in Figures 1 and 2, the opening frame 20 is constructed as an integrated, inverted concave shape when viewed from the front, consisting of left and right vertical frames 21 and 22 and a horizontal frame 23 connected between the upper ends of these vertical frames 21 and 22. Each of the vertical frames 21, 22 and the horizontal frame 23 is constructed by embedding an insulating material (for example, extruded polystyrene foam) or the like in a long, rectangular member made of synthetic resin. This opening frame 20 is fixed around the opening on the outer surface of the wall portion where the opening / closing device 1 is to be installed.

[0043] The covering piece 30 consists of left and right vertical covering pieces 31 and 32, and an upper covering piece 33 that extends between the upper ends of these vertical covering pieces 31 and 32 (see Figure 2). Each of the vertical covering pieces 31, 32 and the upper covering piece 33 has a shape in which a roughly L-shaped cross-section is extended in an elongated manner, and is formed by bending a metal sheet material with good corrosion resistance (for example, a stainless steel sheet material) into an L-shaped cross-section. The vertical covering pieces 31 and 32 are inserted into the vertical frames 21 and 22, respectively, and are integrally fitted and secured. The upper covering piece 33 is inserted into the horizontal frame 23 and is integrally fitted and secured. These vertical covering pieces 31, 32 and the upper covering piece 33 cover the visible surface of the opening in the wall where the opening / closing device 1 is to be installed.

[0044] The transom 40 is fixed to the wall where the opening / closing device 1 is to be installed, so as to fit into the horizontal frame 23 above the opening path of the insulated door 10. This transom 40 consists of a hollow housing containing a suspension wheel and rail, an electric drive device, etc., that suspends the door roller on the upper end of the insulated door 10 and guides it in the opening and closing direction.

[0045] In Figure 1, reference numeral 17 denotes an elastic airtight seal that airtightly seals the space between the insulated door 10 and the opening frame 20. This elastic airtight seal 17 is formed from an elastic material (for example, rubber or elastomer resin) into a thin plate that flexes when pressed against the opening frame 20 or the lower fixed surface. This elastic airtight seal 17 is provided on the left end, upper end, and right end of the interior side surface of the door body 10a, and on the lower end surface of the door body 10a. These elastic airtight seals 17 are integrally joined and continuous. In a preferred example of this embodiment, the elastic airtight material 17 is attached to the door body 10a after the filling of the heat insulating foam 14 into the door body 10a is complete.

[0046] <Effects and Effects> According to the above embodiment, the outer plate-shaped member 11 and the inner plate-shaped member 12, which are adjacent to each other in the thickness direction, can be joined by the adhesive force of the heat-insulating foam 14 that is filled in a fluid state. Furthermore, the two adjacent protrusions 11a3 and 11b3, and 11b3 and 11c3 on the outer plate-like member 11, and the two adjacent protrusions 12a3 and 12b3, and 12b3 and 12c3 on the inner plate-like member 12, can all be covered with the heat-insulating foam 14 and firmly joined together.

[0047] Furthermore, the opposing ends of two adjacent plates 11a and 11b, and 11b and 11c (protrusions 11a3 and 11b3, 11b3 and 11c3, etc., in the illustrated example) on the outer plate-shaped member 11 are offset to one side in the direction of alignment of the two adjacent plates (the left-right direction in Figures 5 and 6) relative to the opposing ends of two adjacent plates 12a and 12b, and 12b and 12c (protrusions 12a3 and 12b3, 12b3 and 12c3, in the illustrated example) on the inner plate-shaped member 12, thereby improving the strength of the door body 10a in the door width direction.

[0048] Furthermore, in a preferred example of this embodiment, the inner plate-shaped member 12 is fastened to the outer plate-shaped member 11 on both sides that straddle the opposing ends (see Figure 7), and this structure also improves the strength of the door body 10a.

[0049] Furthermore, according to this embodiment, since the insulated door 10 has a wood-free structure, it is possible to prevent weight increase due to moisture absorption by the wood, as well as the growth of bacteria.

[0050] <Variation> In the above embodiment, the insulated door 10 and its manufacturing method were applied to a single-sliding type sliding door (opening / closing device 1). However, the basic structure and manufacturing method of the insulated door 10 can be applied to the insulated doors and other insulated doors of the type of opening / closing device shown in Figures 8 to 11.

[0051] The opening and closing device 2 shown in Figure 8 is a double-sliding type (double-sliding type), and the basic structure and manufacturing method of the insulated door 10 described above are applied to each of the insulated doors 210, 210 on both sides.

[0052] The opening and closing device 3 shown in Figure 9 is a single-leaf type hinged door, and the basic structure and manufacturing method of the insulated door 10 described above are applied to the rotating and opening insulated door 310.

[0053] The opening and closing device 4 shown in Figure 10 is a double-opening type hinged door, and the basic structure and manufacturing method of the insulated door 10 described above are applied to the two rotating insulated doors 410, 410 on each side.

[0054] The opening and closing device 5 shown in Figure 11 is an upper and lower door (up and down sliding door), and the basic structure and manufacturing method of the insulated door 10 described above are applied to the insulated door 510 that slides open and closed in the vertical direction.

[0055] Furthermore, the above-described insulated door 10 and its manufacturing method can also be applied to opening and closing devices (not shown), such as folding door bodies, balance door bodies, panel shutter devices, overhead door devices, and movable partition device panel bodies.

[0056] Furthermore, the present invention is not limited to the specific configurations described above, and can be modified as appropriate without altering the essence of the invention.

[0057] <Summary> As described above, the above embodiment discloses the following invention. (1) An insulated door (see Figures 1 to 11) comprising a door body with a hollow plate-like interior and an insulating foam filled inside the door body, wherein the door body is composed of multiple members, and the multiple members are joined together by the insulating foam. (2) The insulated door according to (1) (see Figures 4 to 6), characterized in that no wood is provided inside the door body. (3) The insulated door according to (1) or (2) (see Figure 5) is characterized in that the plurality of members include an outer plate-shaped member and an inner plate-shaped member spaced apart from the outer plate-shaped member. (4) The insulated door according to (3) (see Figures 5-6), characterized in that at least one of the outer panel-shaped member and the inner panel-shaped member of the storage unit includes two or more panel materials connected with their ends facing each other, and each of the opposing ends is provided with a projection that protrudes toward the inside of the door body, and the insulating foam material covers one of the projections and the other projection. (5) The insulated door according to (4) (see Figures 5-6), characterized in that one projection and the other projection have their tip ends bent in opposite directions. (6) Each of the outer panel-shaped member and the inner panel-shaped member includes two or more plate materials connected with their ends facing each other, and the opposing ends of two adjacent plate materials in the outer panel-shaped member are offset in one direction in the direction of alignment of the two adjacent plate materials with respect to the opposing ends of two adjacent plate materials in the inner panel-shaped member, as described in any of (3) to (5) (see Figures 5 to 6). (7) The insulated door according to (6) (see Figure 7), characterized in that one of the outer plate-shaped member and the inner plate-shaped member is fastened to the other on both sides that straddle the opposing ends. (8) An insulated door according to any one of (3) to (7) (see Figures 3, 5, etc.), characterized in that it comprises a columnar support member that supports the space between the outer plate-shaped member and the inner plate-shaped member, and the heat insulating foam material is filled so as to cover the sides of the columnar support member. (9) The insulated door according to (8), characterized in that the columnar support member is made of the same material as the insulating foam. (10) The door body is provided with a filling hole for filling the insulating foam and an outlet hole for allowing a portion of the filled insulating foam to flow out to the outside, as described in any of (1) to (9) (see Figures 3 and 4). (11) An opening and closing device characterized by being equipped with an insulated door described in any of (1) to (10) in a manner that allows it to be opened and closed (see Figures 1, 2, 8 to 11, etc.). (12) A method for manufacturing an insulated door according to (10), comprising a filling step of filling a fluid insulating foam into the interior of the door body through the filling hole, and a filling stop step of stopping the filling of the insulating foam when the insulating foam flows out through the outlet hole. (13) The method for manufacturing an insulated door according to (12), characterized in that the insulated foam is filled while heating the door body during the filling step. [Explanation of Symbols]

[0058] 1,2,3,4,5 Opening and closing devices 10,210,310,410,510 Insulated doors 10a Door body 10a1 Filling hole 10a2 Outflow hole 11. Exterior plate-shaped member 11a,11b,11c,12a,12b,12c plate material 11a1 Flat plate part 11a2 Connecting curve 11a3 Protrusion 11d Flexible Tape 12. Plate-shaped member on the inside of the storage unit 12a,12b,12c plate material 12a1 Flat plate part 12a2 Song section 12a3 Protrusion 13 Columnar support member 14. Insulating foam 20 Opening frame 21,22 Vertical frame 23 Horizontal frame 40 No object

Claims

1. An insulated door comprising a door body with a hollow plate-like structure inside, and an insulating foam filled inside the door body, wherein the door body is composed of multiple members, and the multiple members are joined together by the insulating foam.

2. The insulated door according to claim 1, characterized in that no wood is provided inside the door body.

3. The insulated door according to claim 1, characterized in that the plurality of members include an outer plate-shaped member and an inner plate-shaped member spaced apart from the outer plate-shaped member.

4. At least one of the exterior plate-like member and the interior plate-like member includes two or more plate materials connected with their ends facing each other, and each of the opposing ends is provided with a projection that protrudes toward the inside of the door body. The insulating door according to claim 3, characterized in that the insulating foam material covers one of the protrusions and the other protrusion.

5. The heat-insulating door according to claim 4, characterized in that one projection and the other projection have their tip ends bent in opposite directions.

6. Each of the exterior plate-like member and the interior plate-like member includes two or more plate materials connected with their ends facing each other. The insulated door according to claim 3, characterized in that, among the two or more plate materials, the opposing ends of two adjacent plate materials in the outer plate-shaped member of the storage unit are offset in one direction in the direction of alignment of the two adjacent plate materials with respect to the opposing ends of two adjacent plate materials in the inner plate-shaped member of the storage unit.

7. The insulated door according to claim 6, characterized in that one of the outer panel-shaped member and the inner panel-shaped member is fastened to the other on both sides that straddle the opposing ends.

8. The enclosure is equipped with a columnar support member that supports the space between the outer plate-shaped member and the inner plate-shaped member, The insulated door according to claim 3, characterized in that the insulating foam material is filled so as to cover the side surface of the columnar support member.

9. The insulated door according to claim 8, characterized in that the columnar support member is made of the same material as the insulating foam.

10. The insulated door according to claim 1, characterized in that the door body is provided with a filling hole for filling the insulating foam and an outlet hole for allowing a portion of the filled insulating foam to flow out to the outside.

11. An opening and closing device characterized by being equipped with an insulated door according to any one of claims 1 to 10 in an openable and closable manner.

12. A method for manufacturing an insulated door according to claim 10, comprising a filling step of filling a fluid insulating foam into the interior of the door body through the filling hole, and a filling stop step of stopping the filling of the insulating foam when the insulating foam flows out through the outlet hole.

13. The method for manufacturing an insulated door according to claim 12, characterized in that the insulated foam is filled while heating the door body during the filling step.

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