JP2021063406A - Flush panel with window frames on both surfaces - Google Patents

Abstract

To provide a flush panel with windows on both surfaces in which outer surfaces of the windows on both surfaces extend on the same plane of outer surfaces of surface plates.SOLUTION: A flush panel 1 comprises: two surface plates 20 attached on both sides of a core material 10; and a both-surface window member 30 attached in an opening 25, and having a frame material 31 formed to have a cavity corresponding to the size and shape of the opening 25 and two window plates 32 clamping the frame material 31 and attached on the frame material 31 to cover the whole cavity, wherein notched recess parts 34 are arranged at least in a part in a peripheral edge part joined with the surface plates 20 on the two window plate 32, the two surface plates 20 are attached on the core material to clamp and hold the both-surface window member 30, and the surface plates 20 engage the notched recess parts 34 of the window plates 32 to make an outer surface of the surface plate 20 and an outer surface of the both-surface window member 30 extend on the same plane on both surfaces.SELECTED DRAWING: Figure 4

Description

The present invention relates to flash panels for forming interior fittings and furniture such as doors, sliding doors, Kannon doors, and closet doors.

Conventionally, in interior fittings and furniture, flash panels in which surface decorative plates are attached to both sides of a core material serving as a frame core have been widely used.

In addition, fittings and furniture such as doors, sliding doors, and furniture doors with windows so that the next room or the back of the door can be seen have been widely used. When such a window is provided in the flash panel, it is common to provide an opening in the flash panel and fix an acrylic plate or glass to the opening by using a molding material as a decorative frame or a picture frame. It was.

However, when a molding material as a decorative edge is used, the decorative edge protrudes from the surface plate of the flash panel, so that a step is inevitably formed between the surface plate and the decorative edge. Such a step between the surface plate of the flash panel and the decorative edge and a step between the decorative edge and the window member can cause the fittings such as sliding doors and doors to open and close unintentionally. Especially for transparent windows, there are many opportunities to look into what is happening in the next room, so users often touch the window part, and when they touch the step of the window part, they unintentionally touch it. There is a danger that the door or sliding door will open and close and you will fall. In addition, when trying to slide the sliding door by putting a hand on the step, there is a risk that a finger may be caught between the step with the molding material and the adjacent sliding door or storage portion.

In order to avoid such a danger, in recent years, a flash panel has been manufactured without using a molding material so that a step is not formed between the surface of the window and the surface plate. That is, a flash panel in which the surface plate of the flash panel and the surface of the window are flush with each other and no step is provided is preferably manufactured.

JP-A-2019-73915 Utility Model Registration No. 3213833

Japanese Patent Application Laid-Open No. 2019-73915 discloses a door with a window in which the window portion is detachably unitized and the window portion is provided on the same plane as the door body (see FIG. 1). Here, by making the thickness of the removable window portion the same as the thickness of the door body, the step between the window portion and the door body is eliminated, and the door and the surface of the window are arranged on the same plane. ..

However, when a removable window unit is provided as in Japanese Patent Application Laid-Open No. 2019-73915, it takes time and labor to process the connecting portion between the door body and the window unit. That is, in addition to the normal flash panel manufacturing process, the door body requires processing of a portion to which the window unit is attached. Further, in the window unit as well, it is necessary to process the main body portion and the detachable portion. Therefore, in addition to the conventional flash panel manufacturing process, a lot of work for mounting the window unit is required, which requires a lot of work time and cost as compared with the conventional one.

In Utility Model Registration No. 3213833 by the applicant, the window member and the outer surface of the surface plate are made on the same plane by providing a notch recess in the window member and the surface plate and sandwiching the window member between the surface plate and the core material. The technology to be placed in is disclosed (see FIG. 2).

When windows are provided on both sides using the technique of Utility Model Registration No. 3213833, it is possible to attach window members at the same time in the process of attaching the surface plate to the core material. However, since the work of attaching the window member on one surface and the work of attaching the window member on the other surface are separate steps, it is difficult to align the positions of the window members on the front surface and the back surface. If the position of the window is slightly misaligned between the front surface and the back surface of the flash panel, it is difficult to correct this misalignment, and it is necessary to manufacture one of the front surface plate and the window member from the beginning.

Further, in order to attach the window member, Patent Document 1 requires a fixing device for attachment, and Patent Document 2 requires an adhesive. If the window plate, which is an acrylic plate, and the surrounding wood are completely fixed and there is a change in temperature or humidity, the acrylic plate or wood will not expand or contract in the same way due to heat or humidity, so there will be problems with the joints. May occur.

Therefore, an object of the present invention is to quickly and easily manufacture a flash panel with a double-sided window without a step without significantly changing the manufacturing process of a conventional flash panel. That is, the present invention provides a flash panel with a double-sided window that does not require much a step of attaching a window member in addition to the conventional manufacturing process of a flash panel.

Further, according to the present invention, the window member is attached to the flash panel without using an adhesive or a fixing device, and the window member is not completely fixed, so that the size of the window plate and the surface plate due to changes in humidity and temperature can be determined. Provide a flash panel that can respond to changes.

In the present invention, the above problems are solved by adopting an independent double-sided window member.

The flash panel of the present invention is a surface plate having a core material serving as a frame of the flash panel and an opening for a window, and is attached to two surface plates attached to both sides of the core material and the opening. A double-sided window member, a frame material formed to have a cavity corresponding to the shape and size of the opening, and two pieces attached to the frame material so as to sandwich the frame material and cover the entire cavity. A double-sided window member having a window plate is provided, and a notch recess is provided in at least a part of the peripheral edge portion of the two window plates to be joined to the surface plate, and the two surface plates are the double-sided window member. Is attached to the core material so as to sandwich and hold the window plate, and the surface plate engages with the notched recess of the window plate so that the outer surface of the surface plate and the outer surface of the double-sided window member extend on the same surface on both sides. It is characterized by that.

In the flash panel of the present invention, the opening of the surface plate is formed to be slightly larger than the portion of the window plate excluding the notch recess, and the surface plate and the notch recess of the window plate are not fixed to each other. Can be configured in.

In the flash panel of the present invention, a core material is arranged around the double-sided window member between the two surface plates, and there is a gap between the core material around the double-sided window member and the frame material of the double-sided window member. It can be configured as follows. In this case, it is preferable that the double-sided window member and the core material do not come into contact with each other and have a gap around the entire periphery of the double-sided window member.

The flash panel of the present invention can be configured such that the thickness of the double-sided window member in the region where the notch recess is provided is equal to the thickness of the core material between the two surface plates.

The present invention is a step of attaching two surface plates having openings to both sides of a core material in a method of manufacturing a flash panel with a double-sided window, and the two surface plates are a double-sided window member around the openings. The double-sided window member covers the entire cavity with the frame material formed so as to have a cavity corresponding to the shape and size of the opening, including the step of mounting so as to sandwich and hold the frame material. It has two window plates attached to the frame material, and in the two window plates, at least a part of the peripheral edge to be joined to the surface plate is provided with a notch recess, and the two surface plates are provided. In the step of attaching the window member to the core material, the surface plate is engaged with the notched recess of the window plate, and the outer surface of the surface plate and the outer surface of the double-sided window member are arranged on the same surface on both sides. Provide a method.

In the method for manufacturing a flash panel with a double-sided window of the present invention, the opening of the surface plate is formed to be slightly larger than the portion of the window plate excluding the notch recess, and the surface plate and the notch recess of the window plate are formed. It is possible to prevent them from sticking to each other.

The present invention is also a double-sided window member for a flash panel, which is a frame material having a cavity corresponding to the shape and size of the window of the flash panel, and a frame material so as to cover the entire cavity by sandwiching the frame material. For a flash panel, the two-sided window member is provided with a notch recess in at least a part of the peripheral edge of the window plate to which the double-sided window member is attached to the flash panel. A double-sided window member is provided.

By adopting the above-mentioned configuration of the double-sided window member, the flash panel of the present invention can attach the double-sided window member to the surface plate at the same time in the step of attaching the two surface plates to the core material. As a result, a flash panel with a double-sided window without steps can be obtained without significantly changing the process of the conventional flash panel for attaching surface plates on both sides of the core material and without requiring a large amount of time for the process of attaching the window member. It can be easily manufactured. Further, by adopting the double-sided window member, it is not necessary to align the positions of the front and back windows, and it is possible to easily manufacture a flash panel with a double-sided window.

Further, by holding the two surface plates sandwiching the notched recess extending around the window plate of the double-sided window member, the double-sided window member can be flushed without the need for an adhesive or a fixing tool. Can be attached to. In particular, the opening of the surface plate is formed to be slightly larger than the portion of the window plate excluding the notch recess, and the surface plate and the notch recess of the window plate are not fixed to each other, so that the humidity and heat change. It becomes possible to cope with the expansion and contraction of the acrylic plate and the surface plate due to the above.

FIG. 1 is a flash panel using a detachable window unit in the prior art. FIG. 2 is a conventional flash panel in which a window member is sandwiched between a surface plate and a core material. FIG. 3a is a perspective view of the flash panel of the present invention in one embodiment. FIG. 3b is an exploded perspective view of the flash panel of the present invention in one embodiment. FIG. 4 is a cross-sectional view of the flash panel of the present invention in one embodiment. FIG. 5 is a cross-sectional view of a double-sided window member in the flash panel of the present invention. FIG. 6 is a cross-sectional view of a connecting portion between the double-sided window member and the surface plate in one embodiment. FIG. 7 shows a modified example of the flash panel with a double-sided window of the present invention. FIG. 8 is a perspective view of the frame material of the double-sided window member of the present invention in one embodiment. FIG. 9 is a perspective view of the double-sided window member of the present invention in one embodiment.

The flash panel with a double-sided window of the present invention will be described in detail below with reference to the drawings. FIG. 3a is a perspective view of the flash panel 1 in the present invention, and FIG. 3b is an exploded perspective view of the flash panel 1. The flash panel 1 includes a core material 10 and surface plates 20 attached to both sides of the core material 10. The surface plates 20 on both sides are provided with an opening 25, and the double-sided window member 30 is attached to the opening 25.

The core material 10 can be formed from a square material such as wood or metal. When the flash panel is used as a door for fittings or furniture, the core material 10 needs only exist in the frame portion, and as shown in FIG. 3b, there is a cavity between the core material and the core material. When the flash panel is used as a counter or a table, it is desirable that the core material 10 is configured to fill all the places other than the double-sided window member 30 from the viewpoint of strength. Further, even when used as a fitting or a door, the core material 10 can be configured so as to fill all the places other than the double-sided window member 30.

As the surface plate 20, a material used as a surface material for fittings and furniture can be used, such as a decorative plywood in which a sheet having wood grain or the like printed on the plywood is attached, a veneer, a plate material, a board, or the like. The surface plate 20 is fixed to both sides of the core material 10 with an adhesive, nails, screws, or the like to form the surface of the flash panel. The two surface plates 20 are provided with an opening 25, to which the double-sided window member 30 is attached.

Next, the double-sided window member 30 used for the flash panel of the present invention will be described. FIG. 4 is a cross-sectional view of the window portion of the flash panel 1 along the line AA'of FIG. 3, and FIG. 5 is a cross-sectional view of the double-sided window member along the line AA'. The double-sided window member 30 is attached to the opening 25 of the two surface plates 20. The double-sided window member 30 is composed of two window plates 32 forming the surfaces on both sides of the double-sided window member 30, and a frame member 31 sandwiched between the window plates 32. The frame member 31 extends around the opening 25 along the shape of the opening 25 of the surface plate. The frame member 31 will have a cavity 33 between the window plates 32, 32 on both sides. When the flash panel 1 is viewed from the front, as shown in FIG. 3a, the cavity 33 corresponds to the size and shape of the opening 25 of the surface plate 20 and is equal in size or equal to the opening 25. It is configured to be larger than the opening 25. With this configuration, when the assembled flash panel 1 is viewed from the front, the frame member 31 is not visible in the opening 25, and the opening 25 of the surface plate 20 and the double-sided window member 30 are used for fittings and furniture. It can function as a window.

The frame material 31 can be manufactured from materials such as cardboard, corrugated cardboard, styrofoam, urethane foam, wood, and other metals such as aluminum.

The window plates 32 attached to both sides of the frame material 31 can be formed of an acrylic resin plate or glass, and function as a transparent window. For example, when the frame material 31 is a corrugated cardboard material and the window plate 32 is an acrylic resin, the frame material 31 and the window plate 32 can be fixed with a hot melt hot glue-urethane resin adhesive. ..

As shown in FIGS. 4 and 5, the window plate 32 of the double-sided window member 30 is provided with a notch recess 34 at a joint portion with the surface plate 20. The cutout recess 34 of the window plate 32 is provided all around the opening 25 along the shape of the opening 25 of the surface plate 20. At the time of assembly, the surface plates 20 on both sides are configured to be positioned with the double-sided window member 30 sandwiched in the notch recesses 34. In the example of FIG. 4, the height of the notch recess 34 (the depth of the notch) is equal to or about 1 to 2 mm larger than the thickness of the surface plate 30, whereby the outer surface of the surface plate 20 is formed. And the outer surface of the window plate 32 of the double-sided window member 30 can be located on the same surface on both sides of the flash panel. The notch recess 34 does not necessarily have to be provided on the front circumference of the window plate 32. For example, when the opening 25 is square, it is possible to provide notch recesses only at the positions of the upper side and the lower side of the opening, or only at the positions of the left side and the right side. In these cases, the frame member 31 may be provided on the entire circumference of the opening, or may be provided only on the back surface of the notch recess.

The two surface plates 20 hold the double-sided window member 30 with the notch recess 34 of the window plate 32 sandwiched around the entire circumference of the opening 25, so that the notch of the window plate 32 is not used. The recess 34 and the surface plate 34 can be connected to each other. That is, in the present invention, the double-sided window member 30 can be attached to the flash panel without using an adhesive or a fixing device.

In the embodiment shown in FIG. 4, it is also possible to connect the notched recess 34 of the window plate 32 and the surface plate 20 with an adhesive or the like. When the window plate 32 is an acrylic plate and the surface plate 20 is a decorative plywood, for example, a silylated urethane resin-based adhesive can be used. However, the acrylic plate expands due to heat and humidity, and the surface plate also expands and contracts due to humidity. Therefore, when the window plate 32 and the surface plate 20 are completely fixed, the sizes of the window plate and the surface plate change. Problems such as peeling of the joints and cracks in the window plate and surface plate may occur. Therefore, considering the expansion and contraction of the acrylic plate and the surface plate due to changes in temperature and humidity, it is possible to attach the double-sided window member to the flash panel without completely fixing it without using adhesives or fixing devices. preferable. In the example of FIG. 4, the opening 25 and the window plate 32 are configured to have a clearance on the outer surface because the opening 25 is slightly larger than the area of the window plate 32 other than the notch recess. .. By providing this clearance without completely fixing the double-sided window member 30 to the window plate 32, the size of the window plate 30 and the surface plate 32 can be changed due to humidity or the like, and the joint portion can be peeled off or cracked. It is possible to avoid the problem.

Further, as shown in the embodiment of FIG. 6, a notch recess 21 is also provided inside the surface plate 20 connected to the window plate 32, and the notch recess 34 of the window plate 32 and the notch recess 21 of the surface plate 20 are provided. The double-sided window member 30 and the surface plate 20 can be engaged with each other. In this case, the height of the notch recess 21 of the surface plate (the depth of the notch recess 21) is the thickness of the window plate 32 at the portion where the notch recess 34 is provided (the window plate 32 other than the notch recess 34). By making it substantially equal to (thickness), the outer surfaces of the surface plate 20 and the window plate 32 can be arranged on the same plane.

In the example of FIG. 6, the notch recess 34 of the window plate 32 and the notch recess 21 of the surface plate 20 may be joined by using an adhesive, but as described above, the acrylic plate and the surface plate may be joined. From the viewpoint of expansion and contraction, it is desirable to join the notch recess 34 and the notch recess 21 without using an adhesive or a fixing device.

As shown in FIG. 3b, the core material 10 is arranged so as to surround the double-sided window member 30. The double-sided window member 30 and the core material 10 around the double-sided window member 30 are arranged apart from each other, and a gap 33 of about 10 to 50 mm is formed between the frame material 31 of the double-sided window member 30 and the core material 10 shown in FIG. Exists. Here, as shown in FIG. 4, the thickness of the double-sided window member 30 in the region where the notch recess 34 is provided is equal to the thickness of the surrounding core material 10 between the two surface plates 20. It is configured in. By keeping the gap between the frame material 31 and the core material 10 within 50 mm and making the thickness of the double-sided window member 30 in the region where the notch recess 34 is provided equal to the thickness of the surrounding core material 10. The double-sided window member 30 can be stably held by the surrounding core material 10 and the double-sided surface plates 20 so as not to move, without using fixing tools or adhesives. It will be possible.

In order to stably fix the double-sided window member 30, a part of the frame member 31 of the double-sided window member 30 may be fixed to the core material 10 extending below the frame member 30 with an adhesive or the like. However, as described above, the acrylic plate, the core material, and the surface plate expand and contract due to the influence of temperature and humidity. In order to cope with such expansion and contraction due to temperature and humidity, the frame material 31 of the double-sided window member 30 is not brought into contact with the core material 10 at all, and the core is formed around the entire circumference of the frame material 31 of the double-sided window member 30. It is preferable that the structure is such that there is a gap 33 between the material 10 and the material 10.

With these configurations, the double-sided window member 30 is sandwiched and held by the surface plates 20 on both sides without using an adhesive or a fixing device, and is stably held between the two surface plates 20. Will be.

The frame member 31 is attached so as to be hidden outside the opening 25 of the surface plate 20 so that the frame member 31 cannot be seen when the window of the flash panel 1 is viewed from the front. Further, it is preferable to attach a decorative tape 35 similar to the design of the surface plate 20 to the inner end of the frame member 31 of the double-sided window member 30 that can be seen from the outside of the flash panel 1.

Further, the frame member 31 is configured to extend to the region where the notch recess 34 of the surface plate 32 is located. Since the door and the sliding door are opened and closed many times to apply an impact, it is preferable that the thin portion of the window plate 32 (the portion having the notch recess 34) is entirely reinforced by the frame material 31.

The cavity 33 of the double-sided window member 30 is sealed by the double-sided window plate 32 and the frame member 31. In order to prevent the inside of the double-sided window from becoming cloudy due to humidity, and to prevent the acrylic plate and wood from expanding due to humidity, vents are provided in the frame material 31, the inside of the frame material 31 and the core material 10 and the frame. The dry material may be arranged in the gap 40 between the material 31 and the material 31.

The window of the present invention can have various shapes and sizes as shown in FIG. In FIG. 7a, a square double-sided window is realized by using a square double-sided window member. In FIG. 7, a triangular double-sided window member is used to realize a triangular double-sided window. In the case of a square double-sided window member, one side can be designed to be about 100 to 500 mm.

The double-sided window member 30 of the present invention will be described in more detail. FIG. 8 is a frame member 31 of the double-sided window member 30. Here, the frame member 31 of the square double-sided window member as shown in FIG. 7a is shown. The frame member 31 is substantially equal to the size and shape of the opening 25 of the surface plate 20, or slightly larger than the opening 25. In other words, the frame member 31 is arranged between the two surface plates so as to extend around the opening 25 of the surface plate 20.

FIG. 9 shows a double-sided window member 30 in which window plates 32 are attached to both sides of the frame member 31. The window plate 32 is attached so as to cover at least the cavity 33 of the frame member 31. The window plate 32 may be configured to have substantially the same size and shape as the outside of the frame member 31, or may be configured to be larger than the frame member 31 as shown in FIG. Further, when the frame member 31 is attached to the core member 10 and fixed, the window plate 32 may be configured to be slightly smaller than the outer shape of the frame member 31. Further, as described above, a notch recess 34 is provided at the peripheral edge of the surface plate 32 where the window plate 32 is joined to the surface plate 20. When the double-sided window member 30 is attached to the flash panel, the portion provided with the notch recess 34 is covered with the surface plate 20, and the inner portion of the window plate 32 other than the notch recess 34 is the flash panel 1. It becomes the area of the window.

A method for manufacturing a flash panel having a double-sided window member of the present invention will be described with reference to FIG. 3b. As shown in FIG. 3b, openings 25 are provided in the two surface plates 20 before the surface plate 20 is attached to the core material 10. In the step of attaching the two surface plates having the openings 25 to both sides of the core material 10 which is the frame of the flash panel, the double-sided window member 30 is sandwiched between the two surface plates 20. That is, the step of attaching the two surface plates 20 to the core material 10 and the step of attaching the double-sided window member 30 to the opening 25 are performed at the same time. Here, the surface plate 20 is brought into contact with the notched recess of the window plate 32 of the double-sided window member 34 so that the outer surface of the window plate 32 of the double-sided window member 30 is flush with the outer surface of the surface plate 20. Place in. The surface plate 20 can be attached to and fixed to the core material 10 with an adhesive, nails, screws, screws, or the like.

By sandwiching and holding the notched recess 34 of the double-sided window member 30 between the two surface plates 20, it is possible to stably hold the double-sided window member 30 without using an adhesive. Here, by forming the opening 25 slightly larger than the portion of the window plate 32 excluding the notch recess 34, the opening 25 is formed between the surface plate 20 and the portion of the window plate 32 excluding the notch recess 34. Clearance can be provided. By providing this clearance and not fixing the surface plate 32 and the notch recess 34, it is possible to cope with the change in size of the window plate 32 and the surface plate 20 due to humidity or the like as described above.

As a matter of course, in the method of the present invention, an adhesive may be used between the window plate 32 and the surface plate 20 of the double-sided window member 30, or a part of the frame material 31 of the double-sided window member 30 may be used as a core material around the adhesive. It is also possible to fix it with an adhesive or the like.

As described above, in the manufacturing method of the present invention, the double-sided window member 30 can be attached at the same time in the step of attaching the surface plate 20 to the core material 10. Therefore, it is possible to manufacture a flash panel with a double-sided window without significantly changing the manufacturing process of a conventional flash panel or adding many steps for mounting a window. Further, since the independent double-sided window member 30 is used, there is no need for a step of adjusting the position of the window on the front surface and the back surface.

Further, since the double-sided window member 30 can be attached without using an adhesive or a fixing device, there is no need for a time for drying the adhesive or a step for attaching the fixing device.

According to the present invention, the window member can be fixed to the flash panel without the need for a molding material or the like, and the outer surface of the window member and the outer surface of the surface plate are configured on the same surface without steps on both sides. Is possible.

Further, the flash panel with a double-sided window of the present invention can be configured by attaching a double-sided window member in the manufacturing process of the conventional flash panel without significantly changing the manufacturing process of the conventional flash panel. Therefore, a large number of steps for attaching the window member are not required in addition to the conventional flash panel manufacturing process.

Further, in the present invention, by using the double-sided window member, it is not necessary to accurately align the positions of the windows on the front surface and the back surface as compared with the process in which the windows are attached one side at a time.

Further, the double-sided window member of the present invention is provided with a clearance between the double-sided window member and the opening of the surface plate, and is held by being sandwiched between the two surface plates without being completely fixed by an adhesive or the like. It is possible to prevent peeling and cracking of joints in response to expansion and contraction of acrylic plates and wood due to changes in temperature.

Therefore, according to the present invention, it is possible to quickly and cost-effectively manufacture a flash panel with a double-sided window without significantly changing the conventional flash panel manufacturing process, and the work efficiency is greatly improved. .. Further, it is possible to avoid the problem of expansion / contraction due to heat and humidity that may occur when the acrylic plate is completely fixed to the surface plate.

Although the flash panel of the present invention has been described in detail with reference to the drawings, the flash panel having the double-sided window member according to the present invention is not limited to the illustrated embodiment. Those skilled in the art should understand that the double-sided window member of the present invention can be modified without departing from the scope of the present invention shown in the claims.

1 Flash panel 10 Core material 20 Surface plate 21 Surface plate notch recess 25 Opening 30 Double-sided window member 31 Frame material 32 Window plate 33 Cavity 34 Window plate notch recess 35 Decorative tape 40 Gap

Claims (8)

A double-sided window member for flash panels
A frame material with cavities that correspond to the shape and size of the flash panel window,
It is provided with two window plates attached to the frame material so as to sandwich the frame material and cover the entire cavity.
A double-sided window member for a flash panel, characterized in that a notched recess is provided in at least a part of a peripheral edge portion of the window plate to which the double-sided window member is attached to the flash panel. In flash panels for interior fittings and furniture
The core material that will be the frame of the flash panel,
A surface plate having an opening for a window, the two surface plates attached to both sides of the core material, and
A double-sided window member attached to the opening, the frame material formed so as to have a cavity corresponding to the shape and size of the opening, and the frame material sandwiching the frame material so as to cover the entire cavity. A double-sided window member having two window plates attached to the frame material.
Notch recesses are provided in at least a part of the peripheral edge portion of the two window plates to be joined to the surface plate.
The two surface plates are attached to the core material so as to sandwich and hold the double-sided window member, and the surface plates engage with the notched recesses of the window plate to form an outer surface of the surface plate and the surface plate. A flash panel characterized in that the outer surface of a double-sided window member extends on the same surface on both sides. In the flash panel according to claim 2, the opening of the surface plate is formed to be slightly larger than the portion of the window plate excluding the notch recess, and the surface plate and the window plate are cut. A flash panel characterized in that the notch recesses are not fixed to each other. In the flash panel according to claim 2 or 3, the core material is arranged around the double-sided window member between two surface plates, and the core material around the double-sided window member and the frame of the double-sided window member. A flash panel characterized by having a gap between the material and the material. The flash panel according to claim 4, wherein the flash panel has the gap around the entire periphery of the double-sided window member. In the flash panel according to any one of claims 2 to 5, the thickness of the double-sided window member in the region where the notch recess is provided is equal to the thickness of the core material between the two face plates. A flash panel that features that. In the method of manufacturing flash panels with double-sided windows
A step of attaching two surface plates having openings to both sides of the core material, including a step of attaching the two surface plates so as to sandwich and hold the double-sided window member around the openings.
The double-sided window member was attached to the frame material so as to have a cavity corresponding to the shape and size of the opening and to cover the entire cavity with the frame material interposed therebetween. It has two window boards and
Notch recesses are provided in at least a part of the peripheral edge portion of the two window plates to be joined to the surface plate.
In the step of attaching the two surface plates to the core material, the surface plate is engaged with the notched recess of the window plate, and the outer surface of the surface plate and the outer surface of the double-sided window member are placed on both sides. A method characterized by arranging them on the same surface. In the method according to claim 7, the opening of the surface plate is formed to be slightly larger than the portion of the window plate excluding the notch recess, and the surface plate and the notch recess of the window plate are formed. A method characterized in that the windows are not fixed to each other.

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