Panel body and opening / closing device

Abstract

To provide a panel body having a window section that improves the work efficiency of forming the window edge while also considering aesthetic design. [Solution] A panel body having a window portion, comprising: a front panel 11 having window edge portions 1111, 1112 formed by folding the panel on the vertical side of the window opening, and no folding on the other side; and a rear panel 12 having window edge portions 1211, 1212 formed by folding the panel on the vertical side of the window opening, and no folding on the other side. The panel body 1 has a first window reinforcing member 13 that constitutes a window edge, provided between the front panel 11 and the rear panel 12 on the other side of the aforementioned side.

Description

Technical Field

[0001] The present invention relates to a panel body having a window portion and an opening / closing device using the same as an opening / closing body.

Background Art

[0002] Conventionally, as a panel body serving as a fitting (for example, an opening / closing body such as a door), one having a window portion has been used. A panel body having such a window portion is formed with a window edge portion for fitting a window plate material such as a glass plate (the window edge portion forms a groove for fitting the outer peripheral portion of the window plate material, and serves as an edge of the window by supporting the outer peripheral portion of the window plate material on the front and rear sides (front side and rear side) thereof). As methods for forming a window edge portion for fitting a window plate material such as a glass plate, there are a method of forming the window edge by bending inward a surface material that forms the outer shape of the panel body (hereinafter referred to as "inward bending method"), and a method of forming the window edge portion by arranging (incorporating) a reinforcing member (frame or reinforcing rib) formed as a separate member from the surface material around the window portion (hereinafter referred to as "built-in method"). Patent Documents 1 and 2 employ the inward bending method, while Patent Documents 3 and 4 employ the built-in method.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Patent Document 2

Patent Document 3

Patent Document 4

Summary of the Invention

Problems to be Solved by the Invention

[0004] When using the "inward bending method" to fold the front and rear panels, there will be a shortage of window edge material at the corners of the window. Figures 10(a) and (b) show a conceptual diagram (front panel 200) illustrating this. Figure 10(a) is an unfolded view before the window edge material is formed (folded), and Figure 10(b) is a view of the state after the window edge material has been formed (folded). As shown in Figure 10(a), the window opening 201 has bent sections (side bends 202, top and bottom bends 203) that are folded inward to form the window edge material. As can be seen from the diagram, in this example, as a result of forming the side bends 202, which are in the vertical direction, to be the same as the vertical dimension of the window opening 201, the top and bottom bends 203, which are in the horizontal direction, inevitably have to be shorter than the horizontal dimension of the window opening 201. As a result, as shown in Figure 10(b), the upper and lower horizontal window edges 213 inevitably have deficiencies at both ends. To compensate for these deficiencies, it is necessary to attach (weld) separately formed members (eight members in total, including the front and rear surfaces), which is disadvantageous in terms of work efficiency. On the other hand, in the "built-in" method, as shown in Figure 10(c), the reinforcing members (reinforcement ribs) 330 that make up the window frame protrude slightly from the front panel 310 and rear panel 320 (resulting in a recessed surface). For example, in Figure 10(c), if the lower end of the reinforcement rib 330 were flush with the lower end of the front panel 310 and rear panel 320, the presence of a radius (R) due to the bending process of the reinforcement rib 330 would create a small gap between the reinforcement rib 330 and the front panel 310 and rear panel 320. Such a gap is undesirable because it creates a place where dust and moisture can accumulate. Therefore, to prevent this, the lower end of the reinforcement rib 330 is positioned slightly below the lower end of the front panel 310 and rear panel 320. However, such a recessed surface was somewhat inferior from an aesthetic standpoint.

[0005] In view of the above, the present invention aims to provide a panel body having a window portion that improves the work efficiency of forming the window edge portion while also considering the aesthetic design. [Means for solving the problem]

[0006] (Composition 1) A panel body having a window portion, comprising: a front panel having a window edge portion formed by folding the panel on one of the vertical or horizontal sides of the window opening, and not having a fold on the other side; a rear panel having a window edge portion formed by folding the panel on one of the vertical or horizontal sides of the window opening, and not having a fold on the other side; and a first window reinforcing member constituting the window edge portion, provided between the front panel and the rear panel on the other horizontal or vertical side.

[0007] (Configuration 2) The panel body according to configuration 1, further comprising a second window reinforcing member provided between the front panel and the rear panel so as to be in contact with the fold on one of the aforementioned vertical or horizontal sides.

[0008] (Composition 3) The panel body according to configuration 1 or 2, wherein the folds of the front panel and the rear panel are formed on the vertical sides of the window opening, and the first window reinforcing member is provided on the horizontal sides of the window opening.

[0009] (Composition 4) The panel body according to configuration 2 or 3, wherein an engaging portion is formed on the first window reinforcing member, and an engaged portion is formed on the second window reinforcing member that engages with the engaging portion, and the engagement of the engaging portion and the engaged portion is configured to suppress relative movement between the first window reinforcing member and the second window reinforcing member in both the vertical and horizontal directions.

[0010] (Composition 5) The panel body according to configuration 4, wherein one of the engaging portion or the engaged portion has a lateral gap and the other has a lateral movement restricting fitting portion that fits into the lateral gap, and the other, the engaged portion or the engaging portion, has a vertical gap and the one, the engaging portion or the engaged portion, has a vertical movement restricting fitting portion that fits into the vertical gap.

[0011] (Configuration 6) The panel body according to Configuration 5, wherein a clearance for absorbing a tolerance in forming the folded portions of the front panel and the rear panel is provided between the lateral gap and the lateral movement restricting fitting portion, and between the longitudinal gap and the longitudinal movement restricting fitting portion.

[0012] (Configuration 7) The panel body according to any one of Configurations 4 to 6, wherein the engaging portion and the engaged portion are configured to be slidably engaged with each other in a depth direction perpendicular to the longitudinal direction and the lateral direction.

[0013] (Configuration 8) An opening / closing device comprising: an opening / closing body configured using the panel body according to any one of Configurations 1 to 7; and a frame member for openably / closably attaching the opening / closing body.

Effects of the Invention

[0014] According to the present invention, in a panel body having a window portion, it is possible to provide a panel body that takes design into consideration while improving the working efficiency of forming a window edge portion.

Brief Description of Drawings

[0015] [Figure 1] Front view showing an opening / closing device including an opening / closing body (panel body) according to an embodiment of the present invention [Figure 2] Diagram showing the opening / closing body (panel body) of the embodiment [Figure 3] Enlarged diagram showing a window portion of the opening / closing body (panel body) of the embodiment [Figure 4] Diagram showing a front panel of the opening / closing body (panel body) of the embodiment [Figure 5] Diagram showing an upper window reinforcing member of the opening / closing body (panel body) of the embodiment [Figure 6] Diagram showing a lower window reinforcing member of the opening / closing body (panel body) of the embodiment [Figure 7] Diagram showing a leading-end window reinforcing member of the opening / closing body (panel body) of the embodiment [Figure 8]This diagram illustrates the assembly of the window reinforcement material for the opening / closing body (panel) of the embodiment. [Figure 9] Another example of a window frame formed by folding the front and rear panels. [Figure 10] Diagram explaining the "inward bending method" and "internal method" [Modes for carrying out the invention]

[0016] The embodiments of the present invention will be described in detail below with reference to the drawings. Note that the following embodiments are merely examples of how the present invention can be implemented, and do not limit the present invention to their scope.

[0017] Figure 1 is a front view showing an opening / closing device 100 having an opening / closing body (panel body) 1 according to an embodiment of the present invention. The opening / closing device 100 of this embodiment is A hinged door (opening / closing mechanism) and a panel body 1 having a window section, A frame member 2 for attaching the panel body 1 to an opening in a building, etc. A hinge 3 for attaching the panel body 1 to the frame member 2 so that it can be opened and closed, A handle 4 is provided on the panel body 1, which serves as a gripping part when opening and closing, A window panel material 5, such as a glass plate, is fitted into the window portion of the panel body 1, for purposes such as improving lighting, visibility beyond the door, or enhancing the design. It is equipped with. For the sake of explanation, the front side of Figure 1 will be referred to as the front (or front), and the opposite side as the rear. The top side (top in Figure 1) will be referred to as the top, the opposite side as the bottom, the side of panel 1 that is the hinge (right side in Figure 1) as the hinge side, and the opposite side as the door edge side. The direction from the hinge to the door edge (or vice versa) will be referred to as the horizontal direction, the up and down direction as the vertical direction, and the direction from the front to the rear (or vice versa) as the depth direction. These are for the sake of explanation, and for example, which side is the front can be determined arbitrarily.

[0018] The frame member 2, hinge 3, handle 4, and window panel 5 that constitute the opening and closing device 100 can be configured in any way that performs the same function as each of them, so their explanation is omitted here.

[0019] Figure 2 shows the panel body 1 of this embodiment, with Figure 2(a) being a front view, Figure 2(b) being a vertical cross-sectional view of the portion with a window, and Figure 2(c) being a horizontal cross-sectional view of the portion with a window. Figure 3 is an enlarged view of the portion with a window, with Figure 3(a) being a vertical cross-sectional view and Figure 3(b) being a horizontal cross-sectional view. The panel body 1 of this embodiment is The front panel 11 has a window edge portion 111 (door-side window edge portion 1111, hinge-side window edge portion 1112) formed by folding the panel along the vertical side of the window opening, and does not have a fold along the horizontal side of the window opening. The rear panel 12 has a window edge portion 121 (door-side window edge portion 1211, hinge-side window edge portion 1212) formed by folding the panel along the vertical side of the window opening, and does not have a fold along the horizontal side of the window opening. At the side edge of the window opening, a first window reinforcing member 13 (upper window reinforcing member 131, lower window reinforcing member 132) is provided between the front panel 11 and the rear panel 12, forming the window edge. A second window reinforcing member 14 (door-side window reinforcing member 141, hinge-side window reinforcing member 142) is provided on the vertical side of the window opening, between the front panel 11 and the rear panel 12, so as to be in contact with the folded edges that form the window edge portion 111 and window edge portion 121, The panel body 1 has four reinforcing bones (upper reinforcing bone 151, lower reinforcing bone 152, door-edge reinforcing bone 153, and hinge-side reinforcing bone 154) embedded in its outer periphery, It has.

[0020] Figure 4 shows the front panel 11, with Figure 4(a): front view (mainly showing only the area around the window), Figure 4(b): side view (mainly showing only the area around the window), and Figure 4(c): top view. The front panel 11 is made of steel plate and forms the front surface of the panel body 1. The top and both sides are folded toward the rear to form the side portions 112 (top side portion (not shown), door-end side portion 1121, and hinge side portion 1122). As shown in Figure 2, the bottom edge has lower reinforcing ribs 152 that form the bottom surface. These configurations are the same for the rear panel 12 (symmetrical structure). Therefore, when the front panel 11 and the rear panel 12 are joined together, the outer shape of the panel body is formed in the shape of a rectangular parallelepiped. Here, the bottom edges of the front panel 11 and the rear panel 12 are shown as not being folded over, but the bottom edges may also be folded toward the rear to form the side (bottom) portion. The front panel 11 has a window opening 115 for forming a window section. The vertical edge of the window opening 115, the door edge side, has a door edge 1111, and the hinge side has a hinge side window edge 1112. On the other hand, the horizontal edges (top edge and bottom edge) of the window opening 115 do not have any folds. The door-side window edge 1111 is formed by folding back the tongue portion formed on the door-side of the window opening 115 in an L-shape (folding it back in the depth direction and then folding it back towards the door-side). The door-side window edge 1111 has approximately the same dimensions as the vertical dimensions of the window opening 115 (slightly shorter by the amount of the cutout for forming the tongue portion). The height of the door-side window edge 1111 in the depth direction is formed lower than the door-side side portion 1121 and the hinge side portion 1122. As can be seen from Figure 3(b), this forms a groove for inserting the window panel 5 between the door-side window edge 1211 on the rear panel 12 side. The width dimension of the door-side window edge 1111 is set so that the depth of the groove for inserting the window panel 5 is sufficient to obtain the depth required when inserting the window panel 5 in a sliding manner. The hinge-side window frame 1112 has a structure symmetrical to the door-side window frame 1111 (the same concept as described above).

[0021] The rear panel 12 basically has a structure symmetrical to that of the front panel 11, but has a slightly different configuration in terms of the vertical dimensions of the window opening and the window edge. The window opening of the rear panel 12 is formed larger downward than the window opening 115 of the front panel 11 by an amount corresponding to the vertical height of the molding 1321b (see FIG. 6). The leading-edge side window edge 1211 and the hanging-side window edge 1212 formed on both sides of the window opening of the rear panel 12 also have a vertical dimension substantially the same (slightly shorter) as that of the window opening. Therefore, the leading-edge side window edge 1211 and the hanging-side window edge 1212 are longer downward than the leading-edge side window edge 1111 and the hanging-side window edge 1112 of the front panel 11 by an amount corresponding to the height of the molding 1321b. Other configurations of the rear panel 12 are the same as (symmetrical to) those of the front panel 11, so repeated description is omitted here.

[0022] FIG. 5 is a diagram showing an upper window reinforcement (first window reinforcement) 131, where FIG. 5(a) is a rear view, FIG. 5(b) is a side view, and FIG. 5(c) is a bottom view. The upper window reinforcement 131 is formed of a steel plate, and is provided between the front panel 11 and the rear panel 12 at a position serving as the upper side of the window openings of the front panel 11 and the rear panel 12 to constitute the window edge and reinforce the window portion of the panel body 1. Although the upper window reinforcement 131 of the present embodiment is formed by bending a single steel plate or the like, the present invention is not limited thereto, and it may be formed by joining a plurality of members, and the same applies to other window reinforcements. The upper window reinforcement 131 has a shape resembling an inverted Chinese character "concave" in a side view (cross-sectional shape), and has two upper window edges 1311 projecting downward, which form a groove for inserting the window plate material 5. The groove has substantially the same dimensions as the groove formed by the folded-back portions of the front panel 11 and the rear panel 12 described above, and the two upper window edges 1311 are configured with dimensions that form the groove of said dimensions. The width dimension shown as W2 in Figure 5(c), which has the above cross-sectional shape, is configured to be approximately the same as the dimension between the front edge of the door-side window edge portion 1111 and the hinge end of the hinge-side window edge portion 1112 of the front panel 11 shown as W1 in Figure 4(c) (the rear panel 12 has the same dimensions). The front surface 13121 and rear surface 13122 of the upper window reinforcement member 131 are surfaces that are bonded to the front panel 11 and rear panel 12, respectively, and are formed to a size that provides the necessary bonding strength. At both ends in the width direction of the upper window reinforcement member (first window reinforcement member) 131, engaging portions 1313 are formed as extensions of the rear surface 13122. The engaging portion 1313 has a hook-like shape, which forms a lateral gap 13132. In addition, a vertical movement restricting fitting portion 13131 is formed which fits into the vertical gap 14112 of the door-end (or door-end) window reinforcement member (second window reinforcement member) 141, which will be described later.

[0023] Figure 6 shows the lower window reinforcement (first window reinforcement) 132, with Figure 6(a) being a rear view, Figure 6(b) a side view, and Figure 6(c) a top view. The lower window reinforcement member 132 is made of steel plate and is provided between the front panel 11 and the rear panel 12 at the lower edge of the window opening of the front panel 11 and the rear panel 12, forming the window edge and reinforcing the window portion of the panel body 1. The basic concept of the lower window reinforcement 132 is the same as that of the upper window reinforcement 131, but it differs from the upper window reinforcement 131 in that one of the window edges is composed of a removable trim 1321b. The trim strip 1321b is a component configured as a removable window edge (rear window edge) so that the window panel 5 can be fitted into (or removed from). The trim strip 1321b is a component with a roughly U-shaped cross section and is attached to the lower window reinforcement member 132 by screws S. The width dimension of the trim strip 1321b is shorter than that of the front window edge 1321. The gaps formed at both ends of the trim strip 1321b are into which the lower ends of the door-side window edge 1211 and the hinge-side window edge 1212 of the rear panel 12 (these parts are longer than the door-side window edge 1111 and the hinge-side window edge 1112 of the front panel 11) fit. Aside from the structure of the trim strip 1321b, the concept is the same as that of the upper window reinforcement 131 (symmetrical structure), so the explanation is omitted here.

[0024] Figure 7 shows the door-side window reinforcement (second window reinforcement) 141, with Figure 7(a) being a side view, Figure 7(b) a rear view, and Figure 7(c) a top view. The door-side window reinforcement member 141 is made of steel plate and is provided so as to be in contact with the door-side of the folded-over portion that forms the window edge portion 1111 of the front panel 11 and the window edge portion 1211 of the rear panel 12 (see Figure 3(b)). It constitutes the bottom surface (butt end) of the groove that receives the window plate material 5 and reinforces the window portion of the panel body 1. The door-side window reinforcement member 141 is a U-shaped member in top view (cross-section), and is formed with a length in the vertical direction that is sufficient to engage with both the engaging portion 1313 of the upper window reinforcement member 131 (upper window reinforcement member 131 when installed on the front panel) and the engaging portion 1323 of the lower window reinforcement member 132 (lower window reinforcement member 132 when installed on the front panel) as described above. The upper and lower parts of the door-side window reinforcement member 141 have engaged portions 1411 that engage with the engaging portion 1313 of the upper window reinforcement member 131 and the engaging portion 1323 of the lower window reinforcement member 132, respectively. The upper and lower engaging portions 1411 of the door-side window reinforcement member 141 are formed by cutting out a part of a U-shaped member, thereby creating vertical gaps 14112 that fit into the vertical movement restricting fitting portion 13131 of the upper window reinforcement member 131 and the vertical movement restricting fitting portion 13231 of the lower window reinforcement member 132, respectively. In addition, lateral movement restricting fitting portions 14111 are formed that fit into the lateral gap 13132 of the upper window reinforcement member 131 and the lateral gap 13232 of the lower window reinforcement member 132, respectively.

[0025] The hinge-side window reinforcement (second window reinforcement) 142 has a structure symmetrical to the door-edge-side window reinforcement 141, and its explanation is omitted here.

[0026] Each of the reinforcing ribs 15 (upper reinforcing rib 151, lower reinforcing rib 152, door-edge reinforcing rib 153, and hinge-side reinforcing rib 154) embedded in the four sides of the outer periphery of the panel body 1 is a U-shaped member formed from steel plate, and serves to reinforce the panel body 1. For further reinforcement, additional reinforcing ribs may be provided, or a core material (such as a honeycomb-shaped paper core) may be provided inside the panel body 1. Each reinforcing rib (and core material) is bonded to the front panel 11 and the rear panel 12, and the upper reinforcing rib 151, the door-edge reinforcing rib 153, and the hinge-side reinforcing rib 154 are screwed or riveted to the top surface and both sides of the front panel 11 and the rear panel 12. Furthermore, the method of fixing each reinforcing rib (and core material) between the front panel and the rear panel is not limited to adhesive bonding; any fixing method appropriate to the component may be used, such as fixing with double-sided tape or welding. The same applies to the fixing between each window reinforcement material between the front panel and the rear panel. Furthermore, regarding the fixing between each reinforcing rib and the front and rear panels, the above example shows fixing to the visible surfaces (top and both sides), but it is also possible to fix only the visible surfaces and not the visible surfaces (conversely, it is also acceptable to fix only the visible surfaces and not the visible surfaces).

[0027] The assembly of panel body 1 is performed by placing the front panel 11 flat, arranging each component inside the front panel 11 (by applying adhesive and arranging them), and then covering it with the rear panel 12 (finally screwing the front panel 11 and rear panel 12 to their respective support ribs). Figure 8 is an explanatory diagram that mainly illustrates the assembly of the window section. As can be seen from Figure 8(a), the engaging portion 1313 of the upper window reinforcement 131 and the engaged portion 1411 of the door-side window reinforcement 141 can be engaged with each other by overlapping them in the depth direction (they are configured to slide engage in the depth direction) (although only one of the four corners is shown here, the engagement structure is similar for the other four corners). The assembly of the panel body 1 is performed by arranging each component on top of each other inside the front panel 11, and welding is not required (or can be reduced) in the assembly of the window edge, resulting in excellent workability. Figure 8(b) shows the state in which the upper window reinforcement 131, lower window reinforcement 132, door-edge side window reinforcement 141, and hinge-side window reinforcement 142 are assembled to the front panel 11. As can be seen from the figure, the engagement portion and engaged portion of each window reinforcement are configured to suppress relative movement in both the vertical and horizontal directions between the first window reinforcement 13 and the second window reinforcement 14.

[0028] The above configuration involves fitting a frame-shaped member, formed by interlocking the upper window reinforcement member 131, the lower window reinforcement member 132, the door-end side window reinforcement member 141, and the hinge-side window reinforcement member 142, onto the outside of the door-end side window edge and the hinge-side window edge. However, the door-end side window edge and the hinge-side window edge are formed by bending the front panel and rear panel, respectively, which makes it difficult to form them with high precision. Therefore, it is preferable to provide clearances between the lateral gap and the lateral movement restricting fitting portion, and between the vertical gap and the vertical movement restricting fitting portion, to absorb the tolerances during the forming of the folded edges (door-end side window edge and hinge-side window edge) caused by bending the front panel and rear panel.

[0029] Figure 8(c) shows one corner of the window section with the rear panel 12 attached. As shown in the figure, the upper (and lower) edges of the window frame, which are formed by the upper window reinforcement member 131, have a recessed surface. However, the door edge side (and hinge side), where the window frame is formed by the folded-over front panel 11 and rear panel 12, does not have a recessed surface, resulting in an improved design compared to the conventional "built-in method". The window panel 5 is fitted by removing the trim 1321b, sliding the window panel 5 into the groove, placing the support member (setting block) SB under the window panel 5 (see Figure 3(a)), and then attaching the trim 1321b. After that, as is well known, a backup material is placed between the groove and the window panel 5, and then sealed with a sealant.

[0030] As described above, the opening and closing device 100 (panel body 1) of this embodiment eliminates or reduces welding work in the assembly of the window edge of the panel body, resulting in excellent workability and cost reduction. At the same time, it can be an environmentally friendly product. Furthermore, it allows for a higher level of design aesthetics compared to the conventional "internal construction method."

[0031] In this embodiment, the window opening has a window edge formed by folding the panel along its vertical side, and the window edge along its horizontal side is made up of a window reinforcing material. However, the present invention is not limited to this, and the window opening may also have a window edge formed by folding the panel along its horizontal side, and the window edge along its vertical side may be made up of a window reinforcing material. However, as in this embodiment, forming the window edge by folding the panel in the longitudinal direction of the panel offers superior workability and safety during bending. When bending using bending equipment (press machine), the material tends to spring up on both sides of the bend line. If the size of the material perpendicular to the bend line is large, the range of movement of the material due to the springing motion becomes even larger. In contrast, by folding the panel in the longitudinal direction of the panel (making the bend line in the longitudinal direction of the material), the range of movement of the material due to the springing motion during bending can be suppressed, resulting in improved workability and safer operation. Furthermore, the window area is often rectangular rather than square, and by forming a window bezel by folding the panel along the longer side, the side where a sill occurs can be shortened, which is aesthetically pleasing.

[0032] In this embodiment, an example is shown in which a window reinforcement (second window reinforcement) 14 formed from a separate component is provided at the window edge formed by folding the panel, but the window reinforcement (second window reinforcement) 14 as a separate component is not necessarily required (the present invention is not limited to having a second window reinforcement as a separate component). Figure 9 shows an example in which a separate window reinforcing member (second window reinforcing member) is not provided. In the example in Figure 9, the door-side window edge portion 1111', similar to the door-side window edge portion of Embodiment 1, has a groove bottom surface 1113 that extends to the rear side, and further has a rear surface 1114 that contacts (is bonded to, etc.) the rear surface. The groove bottom surface 1113 constitutes the bottom surface (butt surface) of the groove that receives the window panel 5, and the rear surface 1114 that is bonded to, etc., the rear panel 12' provides stability (strength) to the member. The groove bottom surface 1213, which is formed by extending the hinge-side window edge portion 1212', and the front surface 1214 are based on the same concept (symmetrical structure). Although the configuration shown in Figure 9 is less strong than that of the embodiment, it can be used when the window is small and a separate window reinforcement (second window reinforcement) is not required, or when sufficient strength is provided by, for example, a core material or another reinforcing frame inside the panel.

[0033] In this embodiment, a lateral gap 13132, 13232 is formed in the engaging portions 1313, 1323 of the first window reinforcement member 13, and a lateral movement restricting fitting portion 14111, 14211 is formed in the engaged portion 1411 of the second window reinforcement member 14. However, the present invention is not limited to this, and a lateral movement restricting fitting portion may be formed in the engaging portion of the first window reinforcement member, and a lateral gap may be formed in the engaged portion of the second window reinforcement member. Similarly, in this embodiment, vertical movement restricting fitting portions 13131 and 13231 are formed on the engaging portions 1313 and 1323 of the first window reinforcement member 13, and a vertical gap 14112 is formed on the engaged portion 1411 of the second window reinforcement member 14. However, the present invention is not limited to this, and a vertical gap may be formed on the engaging portion of the first window reinforcement member, and a vertical movement restricting fitting portion may be formed on the engaged portion of the second window reinforcement member. In addition, the “engaging portion” and “engaged portion” of the present invention are not limited to the shapes shown in the embodiments, but may be any shape having a concept based on the description in the embodiments. Furthermore, the terms "engaging part" and "engaged part" are relative, and it is up to the user to decide which is called the "engaging part" and which is called the "engaged part." Furthermore, instead of using the fitting structure with "engaging parts" and "engaged parts" described in the embodiments, the window edges may be joined to each other (for example, by welding). Also, when the window edges are bonded to the front panel and rear panel, it is not necessary to join the window edges to each other.

[0034] In the embodiments described, the front panel 11 and rear panel 12 are made of steel, but the present invention is not limited to this. The front panel and rear panel may be made of a metal other than steel or a non-metallic material, as long as it is a material that can be bent and provides the necessary strength. Furthermore, the reinforcing members and structural supports for each window are not limited to steel, but may be made of materials with the necessary strength.

[0035] In the embodiments, a hinged door is used as an example of an opening and closing device, but the present invention is not limited to this. For example, the concept of the present invention can be applied to any opening and closing device that can have the concept of a panel body as an opening and closing element, such as sliding doors, folding doors, panel shutters, and overhead doors. Furthermore, while the embodiments use an opening / closing mechanism as an example of a panel body, the present invention is not limited to this, and the concept of the present invention can be applied to any building component that can have the concept of a panel body, such as partitions or partition walls. [Explanation of symbols]

[0036] 1... Panel 11...Front panel 111... Window frame 1111...Window frame on the door side 1112... Window edge on the hinge side 115...Window opening 12...Rear panel 121...Window frame 1211...Window frame on the door side 1212...Hinge side window edge 13...First window reinforcement 131... Upper window reinforcement 1313...Engaging part 13131...Vertical movement restricting fitting section 13132...lateral void 132...Lower window reinforcement 1323...Engaging part 13231...Vertical movement restricting fitting part 13232...lateral void 14...Second window reinforcement 141... Door-side window reinforcement material 1411...Engaged part 14111... Lateral movement restricting fitting part 14112...Vertical gap 2...frame members 100...Opening and closing device

Claims

1. A panel body having a window section, A front panel having a window edge formed by folding the panel on one of the vertical or horizontal sides of the window opening, and not having a fold on the other side, A rear panel having a window edge formed by folding the panel on one of the vertical or horizontal sides of the window opening, and not having a fold on the other side, In the other side, the horizontal or vertical side, a first window reinforcing member constituting the window edge is provided between the front panel and the rear panel, A panel body having

2. The panel body according to claim 1, further comprising a second window reinforcing member provided between the front panel and the rear panel so as to be in contact with the fold on one of the vertical or horizontal sides.

3. The panel body according to claim 1 or 2, wherein the folds of the front panel and the rear panel are formed on the vertical sides of the window opening, and the first window reinforcing member is provided on the horizontal sides of the window opening.

4. An engaging portion is formed in the first window reinforcing member, The second window reinforcing member has an engaged portion formed thereon that engages with the engaging portion, The panel body according to claim 2, wherein the engaging portion and the engaged portion are configured to suppress relative movement in both the vertical and horizontal directions between the first window reinforcing member and the second window reinforcing member.

5. The engaging portion or the engaged portion has a lateral gap, and the other portion has a lateral movement restricting fitting portion that fits into the lateral gap, The panel body according to claim 4, wherein the other engaged portion or the engaging portion has a vertical gap, and the one engaged portion or the engaging portion is provided with a vertical movement restricting fitting portion that fits into the vertical gap.

6. The panel body according to claim 5, wherein clearances are provided between the lateral gap and the lateral movement restricting fitting portion, and between the vertical gap and the vertical movement restricting fitting portion, to absorb tolerances during the molding of the folds of the front panel and the rear panel.

7. The panel body according to any one of claims 4 to 6, wherein the engaging portion and the engaged portion are configured to slide engage in the depth direction, which is a direction perpendicular to the vertical and horizontal directions.

8. An opening and closing device comprising an opening and closing body constructed using a panel body according to claim 1 or 2, and a frame member for mounting the opening and closing body in an openable and closable manner.

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