Information disk

Abstract

To provide an information panel having a rational structure capable of achieving both fire resistance and radio wave transmissivity.SOLUTION: An information panel 1 disclosed in the present application includes a metal box body 2 whose front face is open and a door body 4 that is openably and closably mounted on the front face. The door body 4 is formed by combining a door frame 41 made of metal with a door face material 44 having both radio wave transmissivity and fire resistance. A rear window unit 28 is provided on a back wall 21 of the box body 2, a wooden device mounting plate 3 is mounted inside of the back wall 21, and a peripheral edge unit of the device mounting plate 3 and the rear window unit 28 is sealed with a thermally expandable fireproof material 51 interposed therebetween. A portion where a knock-out hole 29 for wiring insertion is formed on a peripheral wall of the box body 2 is covered with a thermally expandable fireproof material 52 on the entire outer surface of the peripheral wall.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The invention disclosed in this application relates to a box-shaped information panel that consolidates and stores connection devices, power sources, wiring, etc. of various information and communication facilities, and more specifically, to an information panel with improved fire resistance of the box body. [Background technology]

[0002] In recent years, communication equipment such as the Internet and residential LANs, and information equipment such as multifunction televisions have come to be widely used in homes. As a result, the types of connection devices that interconnect these pieces of equipment and power supply units that supply power to them have increased, and the wiring that connects them has also become more complex. Box-shaped information panels such as those disclosed in Patent Documents 1 to 7 are provided as terminal equipment that consolidates such connection devices, power supply units, wiring, etc., and there are an increasing number of cases in which such information panels are installed in private homes.

[0003] Such information panels generally have a box body with an open front and a door or lid body attached to the front in an openable manner, and are installed by embedding the box body in an opening formed in a wall. A wooden or resin equipment mounting plate is attached to the inside of the rear wall of the box body, and various devices can be fixed to the equipment mounting plate with screws or the like in any layout. A connection terminal box for communication equipment and multiple power outlets are also attached to the equipment mounting plate in advance. A large number of knockout holes are formed in the peripheral wall of the box body in advance to allow various wires to pass through, and wires connected to external devices are drawn into the inside of the box body from the space inside the wall. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2009-071257 A [Patent Document 2] JP 2010-104073 A [Patent Document 3] JP 2012-134246 A [Patent Document 4] JP 2018-074036 A [Patent Document 5] JP 2011-035294 A [Patent Document 6] JP 2013-207828 A [Patent Document 7] JP 2019-165163 A Summary of the Invention [Problem to be solved by the invention]

[0005] In the information boards disclosed in Patent Documents 1-4 of the background art, the main part of the box for storing the devices is made of resin, and in the information board disclosed in Patent Document 5, the main part of the box is a composite structure of resin and metal. However, an inner wall structure in which an opening is formed in the wall and a resin box is embedded cannot ensure the necessary fire resistance (quasi-fireproof structure as defined by the Building Standards Act, or 15-minute fire resistance of the ministerial ordinance quasi-fireproof structure equivalent thereto). Therefore, the information boards disclosed in Patent Documents 6 and 7 attempt to improve fire resistance by making the box out of metal.

[0006] However, in recent years, the number of devices that use wireless communication functions such as Wi-Fi and Bluetooth has been increasing, so when using a metal box that is not transparent to radio waves, it becomes necessary to install only the wireless communication equipment on the outside of the box.

[0007] To address this issue, the information panel disclosed in Patent Document 7 has a box (equipment storage unit) embedded in the wall and a door attached to its front opening made of metal to ensure fire resistance, and also has a shelf on the front side (inside the room) of the door on which a wireless LAN router and other equipment are attached, and the shelf is covered with a plastic cover to achieve radio wave transparency. However, with this configuration, the cover added to the front of the door protrudes into the room, damaging the aesthetic appearance of the wall. Also, while wireless signals can reach the front side of the door, they cannot reach the back side of the box, i.e., the room on the opposite side of the wall, so there is room for improvement in this regard as well.

[0008] The invention disclosed in this application has been made in consideration of the circumstances described above, and aims to provide an information panel with a rational structure that can achieve both fire resistance and radio wave transparency. [Means for solving the problem]

[0009] In order to achieve the above-mentioned objective, the information panel of the invention disclosed in this application has a basic configuration comprising a metal box body with an open front and a door body that is attached to the front of the box body in an openable and closable manner, the door body being formed by combining a metal door frame with a front window portion and a door panel material that covers the front window portion and is both radio wave transparent and fire resistant.

[0010] Furthermore, the information panel of the invention disclosed in this application employs an additional configuration in which a rear window is provided on the rear wall of the box body, a wooden equipment mounting plate is attached to the inside of the rear wall, and the equipment mounting plate and the peripheral edge of the rear window are sealed with a thermally expandable fireproof material sandwiched between them.

[0011] The door body can be configured so that it is formed by overlapping a door panel material of a size sufficient to cover the front window portion on the back side of a door frame in which the front window portion is formed, and the door panel material is held in place via a retaining edge material attached to the back side of the door frame along the periphery of the front window portion.

[0012] Furthermore, a composite plate material in which a heat-expandable fire-resistant material is sandwiched between two resin plates can be suitably used for the door surface material. In addition, the information panel of the invention disclosed in this application adopts an additional configuration in which a knockout hole for inserting wiring is formed in the peripheral wall of the box body, and the outer surface of the peripheral wall in which the knockout hole is formed is covered over its entire surface with a heat-expandable fire-resistant material.

[0013] It is more preferable that the thermally expandable fireproof material be stretched so as to be bent in an L-shape and cover the area from the peripheral wall in which the knockout hole is formed to the peripheral edge portion of the back wall.

[0014] In addition, the information panel of the invention disclosed in the present application adopts the following additional configuration: a heat dissipation slit is formed in the door frame, a slit back cover is attached to the back side of the area in which the heat dissipation slit is formed with a gap between it and the door frame, a second heat dissipation slit is formed in the slit back cover at a position not facing the heat dissipation slit in the front-to-rear direction, and a heat-expandable fire-resistant material is filled in the peripheral portion between the door frame and the slit back cover. Effect of the Invention

[0015] According to the information panel configured as described above, the fire resistance of the information panel can be improved without impairing radio wave transparency, and the spread of fire can be delayed. [Brief description of the drawings]

[0016] [Figure 1] 1 is a perspective view showing the overall shape of an information board according to an embodiment of the invention disclosed in the present application. [Diagram 2] FIG. 4 is a front view of the information panel with the door body removed. [Diagram 3] FIG. [Figure 4] 2 is a vertical cross-sectional view taken along the line A-A' of the information board. FIG. [Diagram 5] 4 is an enlarged cross-sectional view showing a state in which a conduit connector is inserted into the top surface portion of the information panel. FIG. [Figure 6] 1A is a partial cross-sectional view taken along line B-B' of a ventilation slit formed in a door frame of the information panel, and FIG. 1B is a partial front view taken along line C-C'. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0017] Hereinafter, embodiments of the invention disclosed in this application will be described with reference to the drawings. In the following, when describing the relative positions of parts and members and the directions of their operations, the up-down direction (height direction), left-right direction (width direction), and front-rear direction (depth direction) will be specified based on the state in which the information panel installed on the wall is viewed from inside the room.

[0018] 1 to 6 show an information board according to an embodiment of the invention disclosed in the present application. This information board 1 comprises a metal box body 2 with an open front and a door body 4 attached to the front so as to be able to open and close. The reference dimensions of the information board 1 according to the exemplary embodiment are approximately 60 cm wide, approximately 70 cm high, and approximately 12 cm deep.

[0019] The back wall 21 and the four peripheral walls (top wall 22, left and right side walls 23, bottom wall 24) of the box 2 are formed by bending and joining steel plates having a sufficient fire resistance thickness (approximately 1.2 mm or more as a guideline). A step 25 is formed at the periphery of the front opening, folded inward, and a front frame 26 made of steel plate and having a Z-shaped cross section is attached in front of the step 25 via a front frame mounting bracket 27. The box 2 is installed on the wall surface with an interior wall material W such as gypsum board sandwiched between the front frame 26 and the step 25.

[0020] A rear window portion 28 is formed in the rear wall 21 of the box body 2. In the illustrated embodiment, the rear window portions 28 each having a horizontally long rectangular shape are disposed at two positions, one above the other, as shown in Fig. 3. The opening area of ​​the rear window portions 28 in the two positions combined occupies at least ¼ of the area of ​​the rear wall 21.

[0021] An equipment mounting plate 3, which is slightly smaller than the back wall 21, is attached to the inside of the back wall 21. The equipment mounting plate 3 is made of a wooden board about 25 mm thick, which is thicker than conventional boards, so that it can withstand flames in the event of a fire for more than 15 minutes. As shown in the enlarged view in FIG. 3, the equipment mounting plate 3 is fixed by inserting mounting bolts 32 inserted from the back side of the back wall 21 into mounting holes 31 formed in the four corners of the equipment mounting plate 3 and fastening flange nuts 33 from the front side. This mounting bolt is first fixed so as to sandwich the back wall 21 by the flange nut 34 on the back side, so that a countersunk hole 35 is formed in the mounting hole 31 of the equipment mounting plate 3 to avoid interference with the flange nut 34 on the back side. In this way, by forming the countersunk hole 35 on the back side of the equipment mounting plate 3, it is possible to overlap the back wall 21 of the box body 2 and the equipment mounting plate 3 without any gaps.

[0022] In the invention disclosed in this application, a thermally expandable fireproof material 51 is sandwiched in this gap to ensure fire resistance on the back side. The thermally expandable fireproof material 51 is a sheet-shaped molding made of a thermally expandable resin composition made by mixing butyl rubber or epoxy resin with a phosphorus compound, thermally expandable graphite, inorganic filler, etc., and foams when heated by fire, expanding to a thickness of 10 to 30 times, thereby exhibiting heat insulation. Since this thermally expandable resin composition itself has adhesiveness, it is often used in a form in which a non-adhesive non-combustible material layer made of aluminum glass cloth (ALGC) or a carbon fiber sheet is laminated on one or both sides of the sheet-shaped molding, but a double-sided adhesive material without a non-combustible material layer can be suitably used between the back wall 21 and the equipment mounting plate 3. By sandwiching this heat-expandable fire-resistant material 51 as a gasket in the gap between the equipment mounting plate 3 and the peripheral portion of the rear window portion 28, the equipment mounting plate 3 and the peripheral portion of the rear window portion 28 are sealed, and it is possible to prevent air (oxygen) from flowing into the box 2 through the gap in the event of a fire and causing combustion inside the box 2, or to prevent flames inside the room from passing through the box 2 and erupting into the wall. In the illustrated embodiment, the heat-expandable fire-resistant material 51 is stretched over the area where the equipment mounting plate 3 and the rear wall 21 overlap, but the heat-expandable fire-resistant material 51 may be stretched over the entire back surface of the equipment mounting plate 3.

[0023] Terminal boxes 61 for telephone lines and optical communication lines, a switching hub 62, a multi-port power outlet 63, a mount base 64 for cable ties that bundle wires, etc. are attached in advance in appropriate positions on the front surface of the equipment mounting plate 3. Using these, for example, boosters and distributors 65 that amplify television signals, converters 66 and terminators 67 that connect various communication lines to communication devices, wireless LAN routers 68 and other devices, as well as power adapters for these devices, can be attached in a desired layout. In addition, in Fig. 2, a ground terminal 69 is attached to the right side of the equipment mounting plate 3, in the corner of the box body 2.

[0024] To connect the devices inside the box 2 with external devices, a large number of knockout holes (punched holes) 29 for inserting wiring are formed in advance in the top wall 22 of the box 2. Appropriate positions of these knockout holes 29 are punched out as necessary, and a resin conduit connector 71 as shown in Fig. 5 is attached thereto. A resin flexible conduit (CD pipe, PF pipe, etc.) 72 is connected to the outside of this conduit connector 71, and wiring (not shown) is drawn into the box 2 through this flexible conduit 72.

[0025] In order to improve the fire resistance of the wiring insertion portion, in this invention, almost the entire surface of the top wall 22 including the knockout hole 29 is covered in advance with a thermally expandable fire-resistant material 52. This thermally expandable fire-resistant material 52 is formed by laminating a non-adhesive non-combustible material layer (not shown) made of aluminum glass cloth on one side of a sheet-like molding made of a thermally expandable resin composition, and the other side (adhesive side) on which the non-combustible material layer is not laminated is stretched and fixed to the box body 2. The adhesive used in general adhesive tapes and the like is flammable and may cause flames when heated, but by stretching the thermally expandable fire-resistant material 52 on the box body 2 by its own adhesive force, it is possible to make it less likely to cause flames.

[0026] The thermally expandable fire-resistant material 52 extends from the top wall 22 toward the rear wall 21, bends in an L-shape, and is stretched so as to continuously cover the area from the top wall 22 to the periphery of the rear wall 21 within a range of several centimeters in width. When the electrical conduit connector 71 is attached to the knockout hole 29, the edge of the thermally expandable fire-resistant material 52 broken when the knockout hole 29 is punched is pushed into the punched hole to be tightly attached to the outer circumferential surface of the electrical conduit connector 71. In the event of a fire, the thermally expandable fire-resistant material 52 stretched on the top wall 22 expands upward and tends to peel off from the top wall 22, but by laminating an aluminum glass cloth with small expansion and contraction on one side of the thermally expandable fire-resistant material 52, stretching the thermally expandable fire-resistant material 52 in an L-shape over the rear wall 21, and further pushing and fixing it into the box body 2 from around the electrical conduit connector 71, it is possible to suppress the thermally expandable fire-resistant material 52 from expanding upward and floating up from the top wall 22. This makes it possible to prevent flammable gas generated inside the box 2 in the event of a fire from leaking out of the box 2 through the cuts in the knockout holes 29 or around the electrical conduit connector 71 and catching fire.

[0027] The door body 4 is attached so as to be able to open outward by hinge-joining a metal door frame 41 that fits into the front frame 26 of the box body 2 to one side edge of the front frame 26. The door frame 41 of the illustrated embodiment is formed by bending and joining a steel plate having a sufficient fire resistance thickness (approximately 1.2 mm or more as a guideline) like the box body 2. The door frame 41 has a front window part 42 that is approximately rectangular when viewed from the front, which is hollowed out approximately at its center. The opening area of ​​the front window part 42 occupies at least 1 / 3 of the entire area of ​​the door frame 41. A heat dissipation slit 43 is formed above and below the front window part 42. The illustrated heat dissipation slit 43 has a shape in which a vertically long opening is continuous at a uniform height in the horizontal direction, sandwiching a non-opening part having approximately the same width as the opening width.

[0028] The front window 42 formed in the door frame 41 is covered by overlapping a door panel 44 (not shown in FIG. 1) that is slightly larger than the front window 42 on the back side. A material that is both radio wave transparent and fire resistant is used for this door panel 44. In the illustrated embodiment, a sandwich-structure composite plate material is used in which a thermally expandable fire-resistant material 53 is sandwiched between two acrylic resin plates 45. Both acrylic resin plates 45 have the same thickness (approximately 3 mm). A double-sided adhesive material can be suitably used for the thermally expandable fire-resistant material 53, similar to the material installed in the gap between the rear wall 21 of the box body 2 and the equipment mounting plate 3.

[0029] The door panel 44 is held in place via a retaining edge material 46 attached to the back surface of the front window portion 42. The retaining edge material is formed, for example, by bending a steel plate into a Z-shaped cross section, and is joined to the back surface of the door frame 41 so as to follow at least two edges, including the upper and lower edges, of the periphery surrounding the front window portion 42.

[0030] The acrylic resin plate 45 alone cannot withstand the heat of fire, but by overlapping it with the thermally expandable fire-resistant material 53, the fire resistance is improved. However, if the thermally expandable fire-resistant material 53 is simply attached to the back surface of the acrylic resin plate 45, it will expand toward the inside of the box body 2 in the event of a fire, peel off from the acrylic resin plate 45, and fall into the box body 2. Therefore, the thermally expandable fire-resistant material 53 is sandwiched between two acrylic resin plates 45 from the front and back, and the periphery is further held down by the pressing edge material 46, thereby improving the shape retention of the thermally expandable fire-resistant material 53. In this way, it is possible to achieve both radio wave permeability and fire resistance of the door body 4.

[0031] A slit back cover 8 is attached to the back side of the heat dissipation slit 43 formed in the door frame 41. As shown in Figs. 4 and 6, the slit back cover 8 is a member including a substantially rectangular front plate portion 81 that is slightly larger than the area in which the heat dissipation slit 43 is formed, a peripheral wall portion 82 that surrounds the four periphery of the front plate portion 81, and a protruding edge portion 83 that extends outward from the front edge of the peripheral wall portion 82. The protruding edge portion 83 is joined to the back surface of the door frame 41, and a gap corresponding to the depth of the peripheral wall portion 82 is maintained between the front plate portion 81 and the door frame 41. A second heat dissipation slit 84 that has substantially the same shape as the heat dissipation slit 43 formed in the door frame 41 is formed in the front plate portion 81. However, the second heat dissipation slit 84 is arranged with the positions of the openings of the second heat dissipation slit 84 shifted to the side so that the second heat dissipation slit 84 does not face the heat dissipation slit 43 of the door frame 41 in the front-rear direction when viewed from the front. Then, a heat-expandable fire-resistant material 54 is filled between the door frame 41 and the slit back cover 8 along the peripheral wall portion 82 so as to surround the area where the heat dissipation slits 43 and the second heat dissipation slits 84 are formed. In the event of a fire, this heat-expandable fire-resistant material 54 expands to fill the gap between the door frame 41 and the slit back cover 8, blocking ventilation through the heat dissipation slits 43. Thus, fire resistance is ensured even in the area where the heat dissipation slits 43 are formed.

[0032] As explained so far, the information panel 1 of the invention disclosed in this application employs a door panel material 44 that combines radio wave permeability and fire resistance as part of a metal door body 4, a rear window portion 28 that is permeable to radio waves is provided on the rear surface of the metal box body 2, the rear window portion 28 and the equipment mounting plate 3 are sealed via a heat-expandable fire-resistant material 51, and the wiring insertion point of the peripheral wall is covered on the entire outer surface of the peripheral wall with a heat-expandable fire-resistant material 52. By adopting this configuration, it is possible to achieve both radio wave permeability in the front-to-rear direction and improved fire resistance.

[0033] The technical scope of the invention disclosed in this application should not be interpreted as being limited by the illustrated embodiments, but should be interpreted conceptually based on the claims. When implementing the invention disclosed in this application, the shape, structure, material, quantity, joining form, relative positional relationship, etc. of components not specifically specified in the claims can be appropriately modified within a range in which the same or better effects as those of the illustrated embodiments can be obtained.

[0034] For example, in the invention disclosed in the present application, the opening and closing method of the door body 4 is not particularly limited, so that the door body 4 may be opened and closed in the vertical direction or may be separated from the box body 2. In addition, for example, gypsum board may be used as the door surface material 44 that has both radio wave permeability and fire resistance. The retaining edge material 46 that holds the door surface material 44 may be attached along the four edges of the front window portion 42. The rear window portion 28 formed in the rear wall 21 of the box body 2 may be an opening at one location. The knockout hole 29 for inserting wiring may be formed in the side wall 23 or bottom wall 24 of the box body 2. The thermally expandable fireproof material may be stretched in other appropriate locations according to the shapes of the box body 2 and the door body 4. The types and layout of the devices to be attached inside the box body 2 are also arbitrary. [Industrial Applicability]

[0035] The invention disclosed in this application can be widely used in places where information panels are installed on walls inside ordinary houses and other buildings. [Explanation of symbols]

[0036] 1 Information board 2 box body 21 Back wall 22 Ceiling Wall 23 Side wall 24 Bottom wall 25 Step part 26 Front Frame 27 Front frame mounting bracket 28 Rear window 29 Knockout hole 3 Equipment mounting plate 31 Mounting hole 32 Mounting bolt 33 Flange nut 34 Flange nut 35 Counterbore 4 Door body 41 Door Frame 42 Front window 43 Heat dissipation slit 44 Door surface material 45 Acrylic resin plate 46 Edge material 51 Thermally expandable refractory materials 52 Thermally expandable fireproofing material 53 Thermal expandable fireproofing materials 54 Thermal expandable fireproofing materials 61 Terminal box 62 Switching Hub 63 Power Outlet 64 Mount Base 65 Distributor 66 Conversion Device 67 Terminal device 68 Wireless LAN Router 69 Ground terminal 71 Conduit connector 72 Flexible conduit 8 Slit back cover 81 Front plate part 82 Peripheral wall section 83 Overhang edge 84 Second heat dissipation slit W Interior wall material

Claims

1. The device comprises a metal box having an open front and a door attached to the front of the box in an openable and closable manner, The door body is formed by combining a metal door frame having a front window portion and a door surface material that has both radio wave permeability and fire resistance and covers the front window portion, A rear window portion is provided on the rear wall of the box body, A wooden equipment mounting plate is attached to the inside of the back wall, The equipment mounting plate and the peripheral edge of the rear window are sealed with a heat-expandable fireproof material sandwiched therebetween. An information board characterized by the above.

2. The device comprises a metal box having an open front and a door attached to the front of the box in an openable and closable manner, The door body is formed by combining a metal door frame having a front window portion and a door surface material that has both radio wave permeability and fire resistance and covers the front window portion, The door panel is a composite plate material in which a heat-expandable fire-resistant material is sandwiched between two resin plates. An information board characterized by the above.

3. The device comprises a metal box having an open front and a door attached to the front of the box in an openable and closable manner, The door body is formed by combining a metal door frame having a front window portion and a door surface material that has both radio wave permeability and fire resistance and covers the front window portion, A knockout hole for inserting wiring is formed in the peripheral wall of the box body, The outer surface of the peripheral wall in which the knockout hole is formed is covered entirely with a heat expandable fireproof material. An information board characterized by the above.

4. In the information board according to claim 3, The thermally expandable fireproof material is stretched so as to be bent in an L-shape from the peripheral wall in which the knockout hole is formed to the peripheral edge portion of the back wall of the box body and cover the area. An information board characterized by the above.

5. The device comprises a metal box having an open front and a door attached to the front of the box in an openable and closable manner, The door body is formed by combining a metal door frame having a front window portion and a door surface material that has both radio wave permeability and fire resistance and covers the front window portion, The door frame is formed with a heat dissipation slit, A slit rear cover is attached to the rear side of the area where the heat dissipation slit is formed, with a gap between the slit rear cover and the door frame, The slit rear cover is formed with a second heat dissipation slit at a position not facing the heat dissipation slit in the front-rear direction, The peripheral portion between the door frame and the slit back cover is filled with a heat-expandable fire-resistant material. An information board characterized by the above.

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