Fire extinguishing member installation structure, distribution box, and fire extinguishing member device

Abstract

To provide a fire-extinguishing member installation structure capable of suppressing delay in extinguishing fire, a distribution box and a fire-extinguishing member device.SOLUTION: A fire-extinguishing member installation structure includes a device K disposed in a housing space S defined inside a distribution box 11. A metal heat conducting part 43 is disposed above the device K in the housing space S. The heat conducting part 43 includes a heat-receiving surface 15a along an upper wall surface 43b located above the device K. A fire-extinguishing member 50 for generating fire-extinguishing gas or fire-extinguishing liquid in response to heat is disposed in the housing space S. The fire-extinguishing member 50 is a separate body from the heat conducting part 43, and the fire-extinguishing member 50 is connected to the heat conducting part 43 such that the heat of the heat conducting part 43 is transferred to the fire-extinguishing member 50.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a fire extinguishing member installation structure, a distribution box, and a fire extinguishing member device. [Background technology]

[0002] BACKGROUND ART Distribution boxes placed indoors or outdoors house devices such as outlets, breakers, terminal blocks, repeaters, electrical components, and boosters (see, for example, Patent Document 1). Furthermore, a fire extinguishing device is installed inside the distribution box (see, for example, Patent Document 2). The fire extinguishing device of Patent Document 2 has a first container, a thermal expansion agent sealed in the first container, a second container housed in the first container, and a plug member provided in a part of the second container. A fire extinguishing agent is sealed inside the second container. The second container is deformed by the pressure applied when the thermal expansion agent expands due to heat. The plug member opens to spray the fire extinguishing agent when the thermal expansion agent is overheated to a predetermined temperature that leads to the outbreak of a fire.

[0003] The fire extinguisher is housed inside a television set, which is an example of a distribution box. The fire extinguisher is also arranged with the plug member facing the equipment that could be the source of a fire. When the equipment housed inside the television set overheats due to heat generation from the equipment, the thermal expansion agent expands due to the overheating. When the temperature of the equipment rises to a temperature that is linked to the equipment's fire temperature and the thermal expansion agent overheats, the second container is pressed and deformed by the pressure force caused by the expansion of the thermal expansion agent. The plug member is then pressurized by the extinguishing agent and pulverized. As a result, the extinguishing agent is sprayed toward the equipment, and if the equipment catches fire, the equipment is extinguished. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 5058949 [Patent Document 2] Patent No. 2718444 Summary of the Invention [Problem to be solved by the invention]

[0005] However, there are multiple pieces of equipment inside the distribution box that could potentially catch fire. Therefore, in a distribution box equipped with the fire extinguishing device of Patent Document 2, if the part of the fire extinguishing device that reacts to overheating and the location where the extinguishing agent is ejected are far from the equipment that has caught fire, there is a risk that extinguishing the fire will be delayed. [Means for solving the problem]

[0006] A fire extinguishing member installation structure for solving the above problems has equipment placed in a storage space defined inside a distribution box, and a metal heat conduction part placed above the equipment in the storage space, and the heat conduction part has a heat receiving surface that follows the surface of the inner surface of the distribution box facing the storage space that is located above the equipment, and a fire extinguishing member that generates a fire extinguishing gas or a fire extinguishing liquid in response to heat is placed in the storage space, and the fire extinguishing member is separate from the heat conduction part and is connected to the heat conduction part so that the heat from the heat conduction part is transferred to the fire extinguishing member.

[0007] In the fire extinguishing member installation structure, the fire extinguishing member may be arranged on a part of the heat receiving surface, and the heat receiving surface other than the part where the fire extinguishing member is arranged may be exposed to the accommodation space.

[0008] In the fire extinguishing member installation structure, the heat conducting portion may be disposed above the equipment, between the equipment and the inner surface of the distribution box, and away from the inner surface of the distribution box. In the fire extinguishing member installation structure, the heat receiving surface may cover the entire surface of the inner surface of the distribution box facing the accommodation space, the surface being located above the equipment.

[0009] In the fire extinguishing member installation structure, it is preferable that a plurality of the fire extinguishing members are arranged side by side on the heat receiving surface. In the fire extinguishing member installation structure, a portion of the fire extinguishing member may be arranged so as to overlap the equipment in a plan view of the equipment seen from above.

[0010] Regarding the fire extinguishing member installation structure, the distribution box has an inlet that connects the storage space with the outside of the distribution box, and the gap between the inlet and the wiring and piping material introduced into the storage space from the outside of the distribution box through the inlet is reduced by a gap filling member.

[0011] A fire extinguishing member installation structure for solving the above problems has equipment placed in a storage space defined inside a distribution box, and a metal heat conduction part placed above the equipment in the storage space, and the heat conduction part has a heat receiving surface that is along the surface of the inner surface of the distribution box facing the storage space that is located above the equipment, and a fire extinguishing member that generates a fire extinguishing gas or a fire extinguishing liquid in response to heat is placed in the storage space, and the fire extinguishing member is affixed to a part of the heat receiving surface, and the area of ​​the part of the heat receiving surface to which the fire extinguishing member is affixed that is exposed to the storage space other than the part to which the fire extinguishing member is affixed is larger than the area of ​​the part of the heat receiving surface to which the fire extinguishing member is affixed.

[0012] A distribution box that solves the above problems is a distribution box that has an internal storage space defined for arranging equipment, and has a metal heat-conducting part that is arranged along the surface of the inner surface of the distribution box that faces the storage space, which is above the equipment that is to be placed in the storage space, and the heat-conducting part has a heat-receiving surface that is along the surface of the inner surface of the distribution box that faces the storage space, which is located above the equipment, and has a fire-extinguishing member in the storage space that generates a fire-extinguishing gas or fire-extinguishing liquid in response to heat, and the fire-extinguishing member is separate from the heat-conducting part and is arranged on a part of the heat-receiving surface, and all of the heat-receiving surface except for the part where the fire-extinguishing member is arranged is exposed to the storage space.

[0013] A distribution box that solves the above problems is a distribution box that has an internal storage space defined for arranging equipment, and has a metal heat conduction part that is arranged in the storage space, and the heat conduction part has a heat receiving surface that covers the entirety of at least one of the inner surfaces of the distribution box that faces the storage space, and has a fire extinguishing member in the storage space that generates a fire extinguishing gas or a fire extinguishing liquid in response to heat, and the fire extinguishing member is separate from the heat conduction part and is thermally coupled to the heat conduction part so that the heat from the heat conduction part is transferred to the fire extinguishing member.

[0014] The fire extinguishing device for solving the above problems is a fire extinguishing device that is placed in an accommodation space of a distribution box that has an accommodation space defined inside for arranging equipment, and includes: a heat-conducting member that has a fixing part for fixing to the distribution box and a metal heat-conducting part with a heat-receiving surface that receives heat when the equipment inside the distribution box catches fire; and a fire extinguishing member that is thermally coupled to the heat-conducting part and generates extinguishing gas or extinguishing liquid in response to the heat when the equipment catches fire, wherein the fire extinguishing member is separate from the heat-conducting part and is thermally coupled to the heat-conducting part so that the heat from the heat-conducting part is transferred to the fire extinguishing member. [Effects of the Invention]

[0015] According to the present invention, delays in fire extinguishing can be suppressed. [Brief explanation of the drawings]

[0016] [Figure 1] 1 is an exploded perspective view showing a distribution box and a fire extinguishing member device according to a first embodiment. [Figure 2] FIG. 2 is a perspective view showing a distribution box and a fire extinguishing member device of the fire extinguishing member installation structure. [Figure 3] FIG. [Figure 4] FIG. [Figure 5] 5 is a cross-sectional view of the fire extinguishing member installation structure taken along line 5-5 in FIG. 4. [Figure 6] 6 is a cross-sectional view of the fire extinguishing member installation structure taken along line 6-6 in FIG. 4. [Figure 7]FIG. [Figure 8] An enlarged view showing the inlet and cable. [Figure 9] FIG. 10 is a cross-sectional view showing the state in which the equipment is extinguished. [Figure 10] FIG. 10 is an exploded perspective view showing a distribution box and a fire extinguishing member device according to a second embodiment. [Figure 11] FIG. 10 is a cross-sectional view showing the inside of a distribution box of a fire extinguishing member installation structure according to a second embodiment. [Figure 12] FIG. 6 is a plan view showing a fire extinguishing member installation structure according to a second embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0017] (First embodiment) A first embodiment of a fire extinguishing member installation structure, a distribution box, and a fire extinguishing member device will be described below with reference to FIGS.

[0018] As shown in FIG. 1, FIG. 2, FIG. 3 or FIG. 4, the fire extinguishing member installation structure includes a distribution box 11. The distribution box 11 accommodates a device K. The distribution box 11 includes a box body 12 that is open on one side, and a lid 30 that opens and closes the box body 12. The distribution box 11 is used as a temporary box that accommodates a device K that supplies power during temporary construction. In this case, examples of the device K include a switch and a breaker. The distribution box 11 is also installed on a pole, a utility pole, or the exterior wall of a building. In this case, the distribution box 11 is placed outdoors and is used as a storage box that accommodates a device K such as a booster. The distribution box 11 of this embodiment is installed on a pole 70. Electrical wiring (not shown) is connected to the device K. The distribution box 11 is installed with the box body 12 facing forward.

[0019] The box body 12 is made of synthetic resin. The box body 12 has a rectangular flat rear wall 13 and a rectangular frame-like peripheral wall 14 that protrudes from the edge of the rear wall 13. The box body 12 has four mounting holes (not shown) in the rear wall 13. Each mounting hole is located near a corner of the rear wall 13. The four mounting holes are for attaching an equipment fixing plate 35 to the rear wall 13.

[0020] The distribution box 11 includes an equipment fixing plate 35 fixed to the rear wall 13. The equipment fixing plate 35 is a rectangular plate. One surface of the equipment fixing plate 35 in the thickness direction is a contact surface 35a, and the other surface of the equipment fixing plate 35 in the thickness direction is a fixing surface 35b. The equipment fixing plate 35 has four through holes 35c. Tapping screws 36 that pass through each through hole 35c of the equipment fixing plate 35 are forcibly screwed into the mounting holes. By forcibly screwing the tapping screws 36 into the rear wall 13, the equipment fixing plate 35 is fixed to the rear wall 13 with the contact surface 35a in contact with the rear wall 13. The fixing surface 35b of the equipment fixing plate 35 faces the side of the box body 12 opposite the rear wall 13.

[0021] The peripheral wall 14 is composed of an upper wall 15, a lower wall 16, a left wall 17, and a right wall 18. The upper wall 15, the lower wall 16, the left wall 17, and the right wall 18 are rectangular plate-shaped. The box body 12 has an accommodation space S in the space defined by the rear wall 13 and the peripheral walls 14. The box body 12 is open on the side opposite the rear wall 13. The distribution box 11 is installed so that the upper wall 15 of the box body 12 is positioned vertically above the lower wall 16. The upper wall 15 and the lower wall 16 face each other in the vertical direction Y. The left wall 17 and the right wall 18 face each other in the horizontal direction X.

[0022] The surface of the upper wall 15 facing the storage space S is referred to as the upper wall surface 15a. The surface of the lower wall 16 facing the storage space S is referred to as the lower wall surface 16a. The surface of the left wall 17 facing the storage space S is referred to as the left wall surface 17a. The surface of the right wall 18 facing the storage space S is referred to as the right wall surface 18a. The upper wall surface 15a, the lower wall surface 16a, the left wall surface 17a, and the right wall surface 18a are rectangular. The length of the straight line connecting the upper wall surface 15a and the lower wall surface 16a at the shortest distance is referred to as the vertical length L1. The vertical length L1 is the distance between the upper wall surface 15a and the lower wall surface 16a along the vertical direction Y.

[0023] The length of the straight line connecting the left wall surface 17a and the right wall surface 18a at the shortest distance is defined as the horizontal length L2. The horizontal length L2 is the distance between the left wall surface 17a and the right wall surface 18a along the horizontal direction X. In addition, the direction of the box main body 12 that is perpendicular to the vertical direction Y and the horizontal direction X is defined as the depth direction Z. The dimension of the box main body 12 in the depth direction Z is defined as the depth length L3. The depth length L3 is the shortest dimension from the opening edge of the box main body 12 to the rear wall 13.

[0024] The lid 30 is made of synthetic resin. The lid 30 is integrated with the right wall 18 via a hinge mechanism (not shown) so as to be able to be opened and closed freely. The position where the lid 30 is integrated via the hinge mechanism may be the upper wall 15, the lower wall 16, or the left wall 17 other than the right wall 18.

[0025] As shown in Figure 3 or Figure 5, the lid body 30 is in a closed position to close the storage space S. When the lid body 30 is placed in the closed position, the lid body 30 closes the box body 12. When the box body 12 is closed by the lid body 30, a closed storage space S is defined inside the distribution box 11. The surface of the lid body 30 that faces the storage space S is referred to as the inner surface 30a. The inner surface of the back wall 13 of the box body 12, the upper wall surface 15a, the lower wall surface 16a, the left wall surface 17a, the right wall surface 18a, and the inner surface 30a of the lid body 30 are the inner surfaces of the distribution box 11 that face the storage space S.

[0026] 2 or 4, the storage space S can be opened by rotating the lid 30 from the closed position via the hinge mechanism 31. When the lid 30 is in the fully open position, the entire storage space S is open toward the front of the box body 12.

[0027] The top wall 15 of the box body 12 is provided with a canopy 19. The box body 12 is provided with inlets 20 on the back wall 13 and bottom wall 16. The inlets 20 are holes for drawing wiring and piping materials into the box body 12. The inlets 20 communicate between the storage space S and the outside of the distribution box 11. The inlets 20, through which wiring and piping materials are not drawn, are blocked by blocking members 21. When drawing wiring and piping materials into the box body 12 through the inlets 20, the blocking members 21 are removed from the box body 12.

[0028] The fire extinguishing member installation structure and distribution box 11 includes a fire extinguishing member device 40 disposed in the accommodation space S. As shown in Figures 1, 2, 4, and 5, the fire extinguishing device 40 includes a heat-conducting member 41 arranged in the storage space S, and a fire extinguishing member 50 thermally coupled to a heat-conducting portion 43 provided in the heat-conducting member 41.

[0029] The heat conduction member 41 is made of a metal plate. The heat conduction member 41 integrally includes a rectangular plate-shaped fixing portion 42 and a rectangular plate-shaped heat conduction portion 43. The fixing portion 42 has a contact surface 42a on a first surface in the plate thickness direction. The contact surface 42a is a flat surface. The fixing portion 42 has an exposed surface 42b on a second surface in the plate thickness direction. The exposed surface 42b is a flat surface. The fixing portion 42 has a plurality of fixing holes 42c. The fixing holes 42c penetrate the fixing portion 42 in the plate thickness direction.

[0030] The heat conduction part 43 has an outer surface 43a on a first surface in the plate thickness direction. The outer surface 43a is a flat surface. The outer surface 43a is continuous with the contact surface 42a of the fixed part 42. The contact surface 42a of the fixed part 42 and the outer surface 43a of the heat conduction part 43 are perpendicular to each other. The heat conduction part 43 has a heat receiving surface 43b on a second surface in the plate thickness direction. The heat receiving surface 43b is a flat rectangular surface. The heat receiving surface 43b is continuous with the exposed surface 42b of the fixed part 42. The exposed surface 42b of the fixed part 42 and the heat receiving surface 43b of the heat conduction part 43 are perpendicular to each other.

[0031] When the heat conduction member 41 is viewed from the contact surface 42a or the exposed surface 42b, the heat conduction member 41 has a rectangular shape. The dimension of the short side of the heat conduction member 41 when viewed from the contact surface 42a or the exposed surface 42b is defined as a first dimension W1. The first dimension W1 of the heat conduction member 41 is much smaller than the vertical length L1 of the box body 12.

[0032] The dimension of the long side of the heat conducting member 41 when viewed from the contact surface 42a or the exposed surface 42b is defined as a second dimension W2 of the heat conducting member 41. The second dimension W2 of the heat conducting member 41 is slightly smaller than the horizontal length L2 of the box body 12.

[0033] 6, the dimension of the short side of the heat conduction member 41 when viewed from the outer surface 43a or the heat receiving surface 43b is defined as a third dimension W3 of the heat conduction member 41. The third dimension W3 of the heat conduction member 41 is slightly smaller than the depth length L3 of the box body 12. Therefore, the area of ​​the heat receiving surface 43b, which is the second surface of the heat conduction part 43, is smaller than the area of ​​the upper wall surface 15a of the upper wall 15.

[0034] 4, the heat-conducting member 41 is fixed to the box body 12 by fixing the fixing portion 42 to the equipment fixing plate 35. More specifically, fixing screws 44 inserted into fixing holes 42c of the fixing portion 42 are forcibly screwed into the equipment fixing plate 35, thereby fixing the heat-conducting member 41 to the box body 12. A gap is formed between the outer surface 43a of the heat-conducting portion 43 and the upper wall surface 15a. Furthermore, the gap between the outer surface 43a of the heat-conducting portion 43 and the upper wall surface 15a is constant in the horizontal direction X.

[0035] 6, when the heat receiving surface 43b is viewed from inside the storage space S, the long sides of the heat receiving surface 43b extend in the horizontal direction X, and the short sides of the heat receiving surface 43b extend in the depth direction Z. One of the pair of long sides of the heat receiving surface 43b extends near and parallel to the long side of the pair of long sides of the upper wall surface 15a that is closer to the opening, and the other extends near and along the long side of the upper wall surface 15a that is closer to the rear wall 13. One of the pair of short sides of the heat receiving surface 43b extends along the short side of the pair of short sides of the upper wall surface 15a that is closer to the left wall surface 17a, and the other extends along the short side closer to the right wall surface 18a.

[0036] When the heat conduction part 43 and the upper wall 15 are viewed from inside the accommodation space S, the heat conduction part 43 covers the entire upper wall surface 15a. Note that "covering the entire upper wall surface 15a" not only means covering the entire upper wall surface 15a, but also includes a case where, in a plan view of the heat conduction part 43 and the upper wall 15 viewed from the accommodation space S side, the heat conduction part 43 covers almost the entire upper wall surface 15a, with part of the upper wall surface 15a being visible.

[0037] The fire extinguishing member 50 generates a fire extinguishing gas or a fire extinguishing liquid in response to heat generated when the equipment K disposed in the accommodation space S catches fire. As shown in FIG. 7, the fire extinguishing member 50 is sheet-shaped. The fire extinguishing member 50 includes a sheet-shaped exterior material 51 and a fire extinguishing agent 52 sealed in the exterior material 51. Note that FIG. 7 is a cross-sectional view of the fire extinguishing member 50, but the hatching of the exterior material 51 has been omitted for better visibility. The exterior material 51 is formed of a synthetic resin film. The film has a thickness of about 0.5 to 3 mm and is preferably made of a polyolefin having a melting point of 110 to 160°C, such as polyethylene, cross-linked polyethylene, or polypropylene. A frame 53 may be disposed within the exterior material 51. The frame 53 is made of, for example, polyethylene. The frame 53 is rectangular. The frame 53 ensures a filling space for the fire extinguishing agent 52 within the exterior material 51.

[0038] The extinguishing agent 52 may be, for example, an electrically insulating gas, such as a halide extinguishing agent. Alternatively, the extinguishing agent 52 may be liquid at room temperature and vaporize when heated during a fire. That is, the extinguishing agent 52 generates an extinguishing gas in response to heat. Alternatively, the extinguishing agent 52 may be liquefied during a fire by heating to generate an extinguishing liquid. The generated extinguishing gas or extinguishing liquid is heavier than air. Therefore, the generated extinguishing gas or extinguishing liquid falls downward from the heat-receiving surface 43b of the heat-conducting portion 43.

[0039] The fire extinguishing member 50 has an adhesive surface 50a on one surface in the thickness direction, which adheres the fire extinguishing member 50 to the heat-receiving surface 43b. As shown in Fig. 2 or 6, the area of ​​the adhesive surface 50a is smaller than the area of ​​the heat-receiving surface 43b so that the adhesive surface 50a can be attached to multiple locations on the heat-receiving surface 43b. Two fire extinguishing members 50 are attached to the heat-receiving surface 43b. The fire extinguishing members 50 have a reactive surface 50b on the surface opposite the adhesive surface 50a in the thickness direction. The area of ​​the reactive surface 50b is smaller than the area of ​​the heat-receiving surface 43b.

[0040] Each fire extinguishing member 50 is attached to the heat-receiving surface 43b with the long sides of the attachment surface 50a and the reaction surface 50b extending in the long side direction of the heat-receiving surface 43b. The two fire extinguishing members 50 are attached to the heat-receiving surface 43b with a gap between them in the long side direction of the heat-receiving surface 43b. The heat-receiving surface 43b is exposed to the interior of the storage space S except for the portions where the two fire extinguishing members 50 are attached. Of the two fire extinguishing members 50, the fire extinguishing member 50 closer to the left wall 17 is referred to as the first fire extinguishing member 501, and the fire extinguishing member 50 closer to the right wall 18 is referred to as the second fire extinguishing member 502.

[0041] Next, a fire extinguishing member installation structure including the distribution box 11 and the fire extinguishing member device 40 will be described. As shown in Fig. 5, the distribution box 11 is fixed to the pole 70. The distribution box 11 is fixed to the pole 70 by band B, but the method of fixing the distribution box 11 to the pole 70 may be other than band B.

[0042] As shown in FIG. 2 or 4 , in the distribution box 11, when the cover 30 is rotated by the hinge mechanism 31 and positioned in the open position, the entire storage space S is opened forward. Furthermore, the fixing surface 35b of the equipment fixing plate 35 faces forward from the storage space S. An equipment K is arranged in the storage space S. The equipment K is fixed to the equipment fixing plate 35. In this embodiment, two equipment K are fixed to the equipment fixing plate 35. One of the equipment K, a first equipment K1, is fixed closer to the left wall 17 of the equipment fixing plate 35, and the other, a second equipment K2, is fixed closer to the right wall 18 of the equipment fixing plate 35. The first equipment K1 has larger dimensions in the depth direction Z, vertical direction Y, and horizontal direction X than the second equipment K2.

[0043] In a plan view of the first device K1 and the second device K2 from above, the upper end surface K1a of the first device K1 and the upper end surface K2a of the second device K2 are rectangular. A fire extinguishing device 40 is disposed in the accommodation space S. As shown in FIG. 5 or 6, the heat conduction section 43 of the fire extinguishing device 40 is disposed above the first device K1 and the second device K2 disposed in the accommodation space S. The heat conduction section 43 covers the entire upper end surface K1a of the first device K1 and the upper end surface K2a of the second device K2 from above. The heat receiving surface 43b is located along the upper wall surface 15a, which is an inner surface facing the accommodation space S and is located above the first device K1 and the second device K2. The area of ​​the heat receiving surface 43b is larger than the area of ​​the upper end surface K1a of the first device K1 in a plan view and the area of ​​the upper end surface K2a of the second device K2 in a plan view.

[0044] The heat receiving surface 43b is larger in the horizontal direction X and the depth direction Z than the upper end surface K1a of the first device K1. Similarly, the heat receiving surface 43b is larger in the horizontal direction X and the depth direction Z than the upper end surface K2a of the second device K2. In a plan view of the distribution box 11 seen from above, the upper end surface K1a of the first device K1 and the upper end surface K2a of the second device K2 are located at positions closer to the rear wall 13 in the depth direction Z than the tip edge of the heat conducting section 43.

[0045] 4, the heat receiving surface 43b and the upper end surfaces K1a, K2a are parallel to each other. A distance T1 from the heat receiving surface 43b to the upper end surface K1a of the first device K1 along the vertical direction Y is equal to a distance T2 from the heat receiving surface 43b to the upper end surface K2a of the second device K2 along the vertical direction Y. Note that, when the device K is fixed to the device fixing plate 35, the distance T1 and the distance T2 may be different.

[0046] A first fire extinguishing member 501 is disposed on a portion of the heat-receiving surface 43b, and a second fire extinguishing member 502 is disposed on the other portion of the heat-receiving surface 43b. The first fire extinguishing member 501 is disposed above the first device K1. The second fire extinguishing member 502 is disposed above the second device K2. The reactive surface 50b of the first fire extinguishing member 501 is parallel to the upper end surface K1a of the first device K1. The reactive surface 50b of the second fire extinguishing member 502 is parallel to the upper end surface K2a of the second device K2. A distance T3 from the reactive surface 50b of the first fire extinguishing member 501 to the upper end surface K1a of the first device K1 along the vertical direction Y is equal to a distance T4 from the reactive surface 50b of the second fire extinguishing member 502 to the upper end surface K2a of the second device K2 along the vertical direction Y.

[0047] 6, in a plan view of the distribution box 11, a portion of the first fire extinguishing member 501 near the rear wall 13 overlaps with the upper end surface K1a of the first device K1. Therefore, a portion of the reactive surface 50b of the first fire extinguishing member 501 faces the upper end surface K1a of the first device K1 in the vertical direction Y. On the other hand, in a plan view of the distribution box 11, the second fire extinguishing member 502 does not overlap with the upper end surface K2a of the second device K2. Therefore, the reactive surface 50b of the second fire extinguishing member 502 does not face the upper end surface K2a of the second device K2 in the vertical direction Y. The second device K2 is disposed closer to the rear wall 13 than the second fire extinguishing member 502 and is separated from it in the depth direction Z.

[0048] 8, a cable 60 serving as a wiring / piping material is connected to the first device K1 and the second device K2. The cable 60 is connected to each of the first device K1 and the second device K2.

[0049] The cable 60 connected to the first device K1 is drawn into the storage space S through an inlet 20 in the rear wall 13. The cable 60 connected to the second device K2 is drawn into the storage space S through an inlet 20 different from the inlet 20 through which the cable 60 connected to the first device K1 is drawn. A gap filling member 63 is filled into the gap between the inner peripheral edge of the inlet 20 and the outer peripheral surface of the cable 60 to close the gap. Examples of the gap filling member 63 include putty and mortar. Alternatively, adhesive tape may be attached to the rear wall 13 and the cable 60 to cover the gap.

[0050] Next, the operation of the fire extinguishing member installation structure, the distribution box 11, and the fire extinguishing member device 40 will be described. 9, when a fire starts in the first device K1, if the location of the fire faces the first fire extinguishing member 501 in the vertical direction Y, the reactive surface 50b of the first fire extinguishing member 501 receives heat from the location of the fire and is heated. When the location of the fire faces the heat-receiving surface 43b in the vertical direction Y, the heat-receiving surface 43b receives heat from the location of the fire and is heated. When a fire starts in the second device K2, the second device K2 faces the heat-receiving surface 43b in the vertical direction Y, and therefore the heat-receiving surface 43b receives heat from the location of the fire and is heated.

[0051] Therefore, even if either the first device K1 or the second device K2 catches fire and the fire extinguishing member 50 is distant from the fire location in the horizontal direction X and the depth direction Z, the heat from the fire location can be received by the heat-receiving surface 43b. The heat is quickly conducted to the entire heat-conducting portion 43. As a result, the heat from the heat-conducting portion 43 is quickly conducted to the first fire extinguishing member 501 and the second fire extinguishing member 502. When the temperatures of the first fire extinguishing member 501 and the second fire extinguishing member 502 exceed the melting point of the exterior covering material 51, the exterior covering material 51 melts, and extinguishing gas or extinguishing liquid is generated from the extinguishing agent 52. The generated extinguishing gas or extinguishing liquid falls below the heat-receiving surface 43b and is sprayed onto the first device K1 and the second device K2. As a result, the fire in either the first device K1 or the second device K2, which is the source of the fire, is extinguished by the extinguishing gas or extinguishing liquid.

[0052] According to the first embodiment, the following effects can be obtained. (1-1) In the fire extinguishing member installation structure, the heat-receiving surface 43b is disposed above the first device K1 and the second device K2, and the first fire extinguishing member 501 and the second fire extinguishing member 502 are disposed on a portion of the heat-receiving surface 43b. Therefore, even if either the first device K1 or the second device K2 catches fire and the first fire extinguishing member 501 and the second fire extinguishing member 502 are disposed away from the location of the fire, the heat-receiving surface 43b receives the heat resulting from the ignition and can quickly heat the heat-conducting portion 43. As a result, the first fire extinguishing member 501 and the second fire extinguishing member 502 can generate fire-extinguishing gas or fire-extinguishing liquid, eliminating delays in fire extinguishing.

[0053] (1-2) The heat conduction unit 43 is arranged along the upper wall surface 15a of the distribution box 11. The upper wall surface 15a is the inner surface of the upper wall 15 that defines the storage space S and is the surface facing the storage space S. The first device K1 and the second device K2 are arranged in the storage space S. Therefore, by arranging the heat conduction unit 43 along the upper wall surface 15a, the entire upper end surfaces K1a, K2a can be covered from above by the heat receiving surface 43b. As a result, even if a fire occurs in either the first device K1 or the second device K2, the heat associated with the ignition can be received by the heat receiving surface 43b.

[0054] (1-3) The first fire extinguishing member 501 and the second fire extinguishing member 502 are disposed on the heat-receiving surface 43b. Therefore, depending on the location of ignition, the first fire extinguishing member 501 and the second fire extinguishing member 502 can be directly heated by heat from the location of ignition. Compared to a case in which the first fire extinguishing member 501 and the second fire extinguishing member 502 are disposed on the outer surface 43a of the heat conduction part 43, which is opposite to the heat-receiving surface 43b, the first fire extinguishing member 501 and the second fire extinguishing member 502 are more likely to be heated.

[0055] (1-4) The first fire extinguishing member 501 and the second fire extinguishing member 502 are arranged side by side on the heat-receiving surface 43b in the horizontal direction X. For example, compared to when only one fire extinguishing member 50 is arranged on the heat-receiving surface 43b, the range in which the fire can be extinguished by the fire extinguishing member 50 can be expanded, thereby improving the fire extinguishing performance.

[0056] (1-5) When the extinguishing agent 52 of the extinguishing member 50 reacts to heat, it generates an extinguishing gas or extinguishing liquid that is heavier than air. The first extinguishing member 501 is disposed above the first device K1, and the second extinguishing member 502 is disposed above the second device K2. Therefore, when the extinguishing gas or extinguishing liquid is generated from the extinguishing member 50, the extinguishing gas or extinguishing liquid can be sprayed from above the location of the fire. Therefore, the extinguishing member 50 can efficiently extinguish the fire.

[0057] (1-6) A gap between the inner peripheral edge of the inlet 20 and the outer peripheral surface of the cable 60 is filled with a gap filler 63, and the gap is reduced by the gap filler 63. Therefore, compared to when the gap is not filled with the gap filler 63, the amount of air entering the storage space S through the inlet 20 can be reduced, thereby suppressing the spread of a fire. In particular, when extinguishing gas is generated from the fire extinguishing member 50, the extinguishing gas is prevented from leaking to the outside of the distribution box 11 through the inlet 20, and the inside of the distribution box 11 can be filled with the extinguishing gas. Furthermore, by preventing the extinguishing gas from leaking to the outside of the distribution box 11 through the inlet 20, the inside of the distribution box 11 can be filled with the extinguishing gas until the lid 30 is opened to expose the storage space S, and once the fire is extinguished, self-ignition due to high temperature can be suppressed.

[0058] (1-7) The distribution box 11 and the fire extinguishing device 40 are integrated in advance, and the heat-conducting member 41 and the fire extinguishing member 50 are arranged in the storage space S of the distribution box 11. Therefore, a fire extinguishing member installation structure can be constructed simply by placing the equipment K on the distribution box 11 fixed to the pole 70. For example, compared to a case where the heat-conducting member 41 and the fire extinguishing member 50 are separately arranged as the fire extinguishing member device 40 on a distribution box 11 having only the box body 12 and the lid 30, the fire extinguishing member installation structure can be constructed more easily.

[0059] (1-8) The fire extinguishing member 50 is sheet-shaped and has, on one surface in the thickness direction, an adhesive surface 50a to be attached to the heat-receiving surface 43b. The area of ​​the adhesive surface 50a is smaller than the area of ​​the heat-receiving surface 43b so that the adhesive surface 50a can be attached to multiple points on the heat-receiving surface 43b. Therefore, the first fire extinguishing member 501 and the second fire extinguishing member 502 can be attached to the heat-receiving surface 43b.

[0060] (1-9) Since the fire extinguishing member 50 has the adhering surface 50a, the fire extinguishing member 50 can be easily adhered to the heat-receiving surface 43b, which makes it easy to construct a fire extinguishing member installation structure. (Second embodiment) Next, a second embodiment of a fire extinguishing member installation structure, a distribution box, and a fire extinguishing member device will be described with reference to Figures 10 to 12. Note that the second embodiment is configured by simply modifying the distribution box of the first embodiment, and therefore detailed descriptions of similar parts will be omitted.

[0061] 10 to 12, the fire extinguishing member installation structure includes a distribution box 71. The distribution box 71 includes a box body 72 that is open on one side. The distribution box 71 is installed with the box body 72 facing upward.

[0062] The box body 72 is made of synthetic resin. The box body 72 includes a rectangular bottom wall 73 and a rectangular frame-like peripheral wall 74 that protrudes from the edge of the bottom wall 73. An equipment fixing plate 35 is fixed to the bottom wall 73 of the box body 72. Although not shown in detail, the equipment fixing plate 35 is fixed to the bottom wall 73 by threading tapping screws 36 inserted into through holes into mounting holes provided in the bottom wall 73.

[0063] The box body 72 has bosses 69 protruding from the four corners of the bottom wall 73. Each of the four bosses 69 has a boss hole 69a recessed from the upper end surface. The boss holes 69a are female threaded. The peripheral wall 74 is composed of a first side wall 75, a second side wall 76, a third side wall 77, and a fourth side wall 78. The box body 72 has a storage space S in the space surrounded by the bottom wall 73 and the peripheral wall 74. The storage space S is open on the side opposite the bottom wall 73.

[0064] The surface of the first side wall 75 facing the storage space S is referred to as the first side surface 75a. The surface of the second side wall 76 facing the storage space S is referred to as the second side surface 76a. The surface of the third side wall 77 facing the storage space S is referred to as the third side surface 77a. The surface of the fourth side wall 78 facing the storage space S is referred to as the fourth side surface 78a. The first side surface 75a and the second side surface 76a face each other in the first direction N1, and the third side surface 77a and the fourth side surface 78a face each other in the second direction N2.

[0065] The shortest distance between the first side surface 75a and the second side surface 76a is defined as the first length. The first length is the distance between the first side surface 75a and the second side surface 76a along the first direction N1. The shortest distance between the third side surface 77a and the fourth side surface 78a is defined as the second length. The second length is the distance between the third side surface 77a and the fourth side surface 78a along the second direction N2.

[0066] In addition, in the box body 72, a direction perpendicular to the first direction N1 and the second direction N2 is defined as a third direction N3. The dimension of the box body 72 in the third direction N3 is defined as a third length. The third length is the shortest dimension from the opening edge of the box body 72 to the bottom wall 73.

[0067] The distribution box 71 has a lid 80 that closes the storage space S. The lid 80 is made of synthetic resin. The lid 80 is in the shape of a square plate. The lid 80 has screw holes 81 at its four corners. The lid 80 is fixed to the box body 72 by threading screws 82 inserted into the screw holes 81 into the boss holes 69a of the box body 72.

[0068] The storage space S is closed by the lid 80, thereby defining a closed storage space S inside the distribution box 71. The lid 80 has an inner surface 80a on one side in the thickness direction and an outer surface 80b on the other side in the thickness direction. The first side surface 75a, the second side surface 76a, the third side surface 77a, the fourth side surface 78a, and the inner surface 80a of the lid 80 are inner surfaces of the distribution box 71 that face the storage space S.

[0069] The fire extinguishing member installation structure includes a fire extinguishing member device (90) arranged in the housing space (S) of the distribution box (71). The fire extinguishing device 90 includes a heat-conducting member 91 fixed to the cover 80 of the distribution box 71 and a fire extinguishing member 50 thermally coupled to the heat-conducting member 91 .

[0070] The heat conducting member 91 is a rectangular metal plate. The heat conducting member 91 has a contact surface 91a on a first surface in the plate thickness direction. The contact surface 91a is flat. The heat conducting member 91 has a heat receiving surface 91b on a second surface in the plate thickness direction. The heat receiving surface 91b has a flat rectangular shape. The heat conducting member 91 has fixing holes 91c as fixing portions at its four corners. In the second embodiment, the portions of the heat conducting member 91 other than the fixing holes 91c form the heat conducting portion.

[0071] The dimension of the heat conducting member 91 in the first direction N1 is defined as a first dimension W1. The first dimension W1 of the heat conducting member 91 is slightly smaller than the first length of the box body 72. The dimension of the heat conducting member 91 in the second direction N2 is defined as a second dimension W2. The second dimension W2 of the heat conducting member 91 is slightly smaller than the second length of the box body 72. The area of ​​the heat receiving surface 91b of the heat conducting member 91 is slightly smaller than the area of ​​the inner surface 80a of the lid 80.

[0072] The heat-conducting member 91 is fixed to the lid body 80 with a contact surface 91a in contact with an inner surface 80a of the lid body 80. More specifically, fixing screws 94 inserted into fixing holes 91c of the heat-conducting member 91 are forcibly screwed into the lid body 80, thereby fixing the heat-conducting member 91 to the lid body 80.

[0073] In a plan view of the heat conduction member 91 and the lid 80 seen from inside the accommodation space S, the heat conduction member 91 covers the entire inner surface 80a of the lid 80. Note that "covering the entire inner surface 80a" not only means covering the entire inner surface 80a, but also includes a case where, in a plan view of the heat conduction member 91 and the lid 80 seen from the accommodation space S side, the heat conduction member 91 covers almost the entire inner surface 80a and part of the inner surface 80a is visible.

[0074] Two fire extinguishing members 50 are attached to the heat-receiving surface 91b of the heat-conducting member 91. The area of ​​the reactive surface 50b of each fire extinguishing member 50 is smaller than the area of ​​the heat-receiving surface 91b. Each fire extinguishing member 50 is attached to the heat-receiving surface 91b with the long sides of the attachment surface 50a and reactive surface 50b extending in the first direction N1 of the heat-receiving surface 91b. The two fire extinguishing members 50 are attached to the heat-receiving surface 91b with an interval between them in the second direction N2 of the heat-receiving surface 91b.

[0075] The heat-receiving surface 91b is exposed to the accommodation space S except for the portions where the two fire extinguishing members 50 are attached. Of the two fire extinguishing members 50, the fire extinguishing member 50 closer to the third side wall 77 is referred to as the first fire extinguishing member 501, and the fire extinguishing member 50 closer to the fourth side wall 78 is referred to as the second fire extinguishing member 502.

[0076] Next, a fire extinguishing member installation structure including the distribution box 71 and the fire extinguishing member device 90 will be described. The distribution box 71 is installed on a concrete foundation or on a ceiling. In the second embodiment, the distribution box 71 is installed on a concrete foundation.

[0077] In the distribution box 71, when the lid 80 is removed from the box body 12, the entire storage space S is opened upward. Furthermore, the fixing surface 35b of the equipment fixing plate 35 faces upward from the storage space S. An equipment K is arranged in the storage space S. The equipment K is fixed to the equipment fixing plate 35. In this embodiment, one equipment K is fixed to the equipment fixing plate 35. The equipment K is fixed to the center of the equipment fixing plate 35. In a plan view of the equipment K seen from above, the upper end surface Ka of the equipment K has a rectangular shape with long sides extending in the first direction N1.

[0078] A fire extinguishing device 90 is disposed in the accommodation space S. A heat conducting member 91 of the fire extinguishing device 90 is disposed above a device K disposed in the accommodation space S. The heat conducting member 91 covers the entire upper end surface Ka of the device K from above. The heat receiving surface 91b is along the inner surface 80a of the lid body 80 located above the device K, among the inner surfaces facing the accommodation space S. The area of ​​the heat receiving surface 91b is larger than the area of ​​the upper end surface Ka of the device K.

[0079] The heat receiving surface 91b is larger in the first direction N1 and the second direction N2 than the upper end surface Ka of the device K. In a plan view of the distribution box 71 seen from above, the upper end surface Ka of the device K is located at a position further inward than the outer edge of the heat receiving surface 91b.

[0080] The heat-receiving surface 91b and the upper end surface Ka are parallel to each other. A first fire extinguishing member 501 is disposed on a part of the heat-receiving surface 91b, and a second fire extinguishing member 502 is disposed on the other part of the heat-receiving surface 91b. The first fire extinguishing member 501 and the second fire extinguishing member 502 are disposed above the device K.

[0081] In a plan view of the distribution box 71, the device K is arranged between the first fire extinguishing member 501 and the second fire extinguishing member 502 in the second direction N2. Therefore, the first fire extinguishing member 501 and the second fire extinguishing member 502 do not overlap with the upper end surface Ka of the device K in the third direction N3. A cable (not shown) is connected to the device K. An electric conduit (not shown) is connected to the distribution box 71. The cable is wired inside the electric conduit.

[0082] Next, the operation of the fire extinguishing member installation structure, the distribution box 71, and the fire extinguishing member device 90 will be described. When a fire breaks out from device K, the location of the fire does not face first fire extinguishing member 501 or second fire extinguishing member 502 in the vertical direction Y, but faces heat-receiving surface 91b. Therefore, heat-receiving surface 91b is heated by receiving heat from the location of the fire.

[0083] Therefore, even if the appliance K catches fire and the fire extinguishing member 50 is far from the location of the fire, the heat-receiving surface 91b can receive the heat from the location of the fire. The heat is quickly conducted throughout the heat-conducting member 91. As a result, the heat from the heat-conducting member 91 is quickly conducted to the first fire extinguishing member 501 and the second fire extinguishing member 502. When the temperatures of the first fire extinguishing member 501 and the second fire extinguishing member 502 exceed the melting point of the exterior covering material 51, the exterior covering material 51 melts, and an extinguishing gas or an extinguishing liquid is generated from the extinguishing agent 52. The generated extinguishing gas or extinguishing liquid falls below the heat-receiving surface 91b and is sprayed onto the appliance K. As a result, the appliance K, which is the source of the fire, is extinguished by the extinguishing gas or extinguishing liquid.

[0084] Therefore, according to the second embodiment, in addition to the effects (1-1) to (1-9) described in the first embodiment, the following effects can be obtained. (2-1) By fixing the heat-conducting member 91 of the fire extinguishing member apparatus 90 to the inner surface 80a of the lid 80, the heat-conducting member 91, the first fire extinguishing member 501, and the second fire extinguishing member 502 can be integrated into the lid 80. Then, by fixing the lid 80 to the box body 72 to close the accommodation space S, the fire extinguishing member apparatus 90 can be placed in the accommodation space S. Therefore, a fire extinguishing member installation structure can be constructed simply by placing the device K in the distribution box 71 and constructing the distribution box 71. For example, the fire extinguishing member installation structure can be constructed more easily than when the heat-conducting member 91 and the fire extinguishing member 50 are separately placed in a distribution box 71 that only has the box body 72 and the lid 80.

[0085] This embodiment can be modified as follows: This embodiment and the following modifications can be combined and implemented within the scope of technical compatibility. The fire extinguishing member 50 does not have to have the adhesive surface 50a. In this case, the fire extinguishing member 50 may be attached to the heat-receiving surfaces 43b, 91b with an adhesive or may be attached to the heat-receiving surfaces 43b, 91b with adhesive tape.

[0086] In the first embodiment, the heat-conducting member 41 may be arranged along at least one of the bottom wall surface 16 a, the left wall surface 17 a, the right wall surface 18 a of the box body 12, and the inner surface 30 a of the lid body 30, and a heat-receiving surface may be provided along at least one of the surfaces 16 a, 17 a, 18 a, 30 a.

[0087] In the second embodiment, the heat-conducting member 91 may be arranged along at least one of the first side surface 75 a, the second side surface 76 a, the third side surface 77 a, and the fourth side surface 78 a of the box body 72, and a heat-receiving surface may be provided along at least one of the surfaces 75 a, 76 a, 77 a, and 78 a.

[0088] In each embodiment, the gap between the inlet 20 and the cable 60 does not need to be closed as long as it is reduced by the gap filling member 63. The extinguishing gas or liquid generated from the extinguishing agent 52 may be lighter than air.

[0089] In each embodiment, only one fire extinguishing member 50 may be disposed on the heat-receiving surface 43b, 91b. In this case, the area of ​​the adhesive surface 50a of the fire extinguishing member 50 may be equal to the area of ​​the heat-receiving surface 43b, 91b so that the fire extinguishing member 50 covers the entire heat-receiving surface 43b, 91b. Alternatively, the area of ​​the adhesive surface 50a of the fire extinguishing member 50 may be smaller than the area of ​​the heat-receiving surface 43b, 91b so that the fire extinguishing member 50 covers only a part of the heat-receiving surface 43b, 91b.

[0090] In each embodiment, when a plurality of fire extinguishing members 50 are arranged on the heat-receiving surfaces 43b and 91b, the plurality of fire extinguishing members 50 may be arranged without any gaps between them so as to cover the entire heat-receiving surfaces 43b and 91b.

[0091] Three or more fire extinguishing members 50 may be arranged on the heat-receiving surfaces 43b and 91b, or only one fire extinguishing member 50 may be arranged on each of the heat-receiving surfaces 43b and 91b. In the first embodiment, the first fire extinguishing member 501 may be disposed on the heat-receiving surface 43b so as not to overlap with the upper end surface K1a of the first device K1 in the vertical direction Y in a plan view. On the other hand, the second fire extinguishing member 502 may be disposed on the heat-receiving surface 43b so as to overlap with at least a portion of the upper end surface K2a of the second device K2 in the vertical direction Y in a plan view.

[0092] Alternatively, in the first embodiment, the first fire extinguishing member 501 may be arranged on the heat receiving surface 43b so as to overlap in the vertical direction Y with at least a portion of the upper end surface K1a of the first equipment K1 in a planar view, and the second fire extinguishing member 502 may also be arranged on the heat receiving surface 43b so as to overlap in the vertical direction Y with at least a portion of the upper end surface K2a of the second equipment K2 in a planar view.

[0093] In the second embodiment, at least one of the first fire extinguishing member 501 and the second fire extinguishing member 502 may be disposed on the heat-receiving surface 91b so as to overlap part of the upper end surface Ka of the device K in the vertical direction Y in a plan view.

[0094] In the first embodiment, the fire extinguishing member 50 may be disposed on the outer surface 43 a of the heat conducting portion 43 . In the first embodiment, the fire extinguishing members 50 may be attached to the inner surface of the peripheral wall 14. In this case, the fire extinguishing members 50 and the heat conducting portions 43 are thermally coupled by, for example, a metal plate. The heat conducting portions 43 along the upper wall surface 15a of the upper wall 15 and the fire extinguishing members 50 arranged on the heat receiving surface 43b may or may not be provided.

[0095] In the second embodiment, the fire extinguishing member 50 may be attached to the inner surface of the peripheral wall 74. In this case, the fire extinguishing member 50 and the heat conducting member 91 are thermally coupled by, for example, a metal plate. The heat conducting member 91 along the inner surface 80a of the lid 80 and the fire extinguishing member 50 arranged on the heat receiving surface 91b may or may not be provided.

[0096] In the first embodiment, as long as the heat conducting portion 43 of the heat conducting member 41 can be arranged along the upper wall surface 15a of the upper wall 15, the fixing portion 42 may be fixed to any one of the peripheral walls 14 instead of the device fixing plate 35.

[0097] In the second embodiment, the heat-conducting member 91 may have a plate-shaped fixing portion that is perpendicular to the heat-conducting member 91. In this case, the fixing portion of the heat-conducting member 91 is fixed to one of the peripheral walls 74.

[0098] In the first embodiment, the outer surface 43 a and the contact surface 42 a, and the heat-receiving surface 43 b and the exposed surface 42 b of the heat-conducting part 43 and the fixing part 42 do not have to be perpendicular to each other. In this case, the heat-receiving surface 43 b of the heat-conducting part 43 is inclined with respect to the upper wall surface 15 a of the upper wall 15.

[0099] In each embodiment, the device fixing plate 35 may be omitted. In this case, in the first embodiment, the device K is fixed directly to the rear wall 13, and in the second embodiment, the device K is fixed directly to the bottom wall 73.

[0100] In the first embodiment, there is a gap between the outer surface 43a of the heat conduction portion 43 and the upper wall surface 15a of the upper wall 15, but the outer surface 43a of the heat conduction portion 43 and the upper wall surface 15a of the upper wall 15 may be in contact with each other.

[0101] In the first embodiment, the distribution box 11 and the fire extinguishing member apparatus 40 are separate bodies. To construct the fire extinguishing member installation structure, first, the distribution box 11 is installed on the pole 70 so that the upper wall 15 of the box body 12 is positioned above the lower wall 16 in the vertical direction Y. Then, the fire extinguishing member apparatus 40 is placed in the accommodation space S so that the heat receiving surface 43b is positioned above the equipment K placed in the accommodation space S. Then, the fixing portion 42 of the heat conducting member 41 of the fire extinguishing member apparatus 40 is fixed to the box body 12, and the heat receiving surface 43b is positioned along the upper wall surface 15a and above the equipment K, thereby constructing the fire extinguishing member installation structure. With this configuration, it is sufficient to position the heat receiving surface 43b directly above the equipment K placed in the accommodation space S, making it easy to construct a fire extinguishing member installation structure that has the function of receiving heat on the heat receiving surface 43b in the event of a fire.

[0102] In addition, after the distribution box 11 is installed on the pole 70, the fire extinguishing device 40 may be placed in the storage space S, and then the equipment K may be placed in the storage space S so that the equipment K is placed below the heat receiving surface 43b.

[0103] The gap filling member 63 is not limited to being filled into the gap so as to contact the inner circumferential surface of the inlet 20 of the distribution box 11. For example, it may be inside a protective tube such as a conduit connected to the distribution box 11, or inside a connector connecting the distribution box 11 and the protective tube.

[0104] In the first embodiment, the third dimension W3 of the heat-conducting member 41 is slightly smaller than the depth L3 of the box body 12, but this is not limiting. If the lid 30 has a recessed shape, the third dimension W3 may be larger than the depth L3. In this case, the heat-conducting portion 43 of the heat-conducting member 41 extends beyond the edge of the opening of the box body 12 and into the inside of the lid 30.

[0105] In the first embodiment, the fixing portion 42 of the heat-conducting member 41 may be fixed to the equipment fixing plate 35 by a method other than the tapping screw 36, for example, by adhesive or adhesive tape. In the second embodiment, the heat-conducting member 91 may be fixed to the lid 80 by a method other than the fixing screw 94, for example, by adhesive or adhesive tape.

[0106] In the first embodiment, the vertical length L1, horizontal length L2, and depth length L3 of the distribution box 11 may be changed to change the volume of the distribution box 11. Similarly, in the second embodiment, the volume of the distribution box 71 may be changed. In this case, the number of fire extinguishing members 50 may be increased or decreased in accordance with the change in the volume of the distribution boxes 11 and 71.

[0107] The technical ideas that can be understood from the above-described embodiment and modified examples will be described. [Appendix 1] The equipment is arranged in a storage space defined inside the distribution box, a metal heat conducting part is disposed above the device in the accommodation space; the heat conducting portion has a heat receiving surface that is along a surface of the inner surface of the distribution box that faces the housing space and is located above the device, a fire extinguishing member that generates a fire extinguishing gas or a fire extinguishing liquid in response to heat is disposed in the storage space; The fire extinguishing member installation structure is characterized in that the fire extinguishing member is disposed on a part of the heat receiving surface.

[0108] [Appendix 2] The equipment is arranged in a storage space defined inside the distribution box, a metal heat conducting part is disposed above the device in the accommodation space; The heat conducting unit has a heat receiving surface having an area larger than an area of ​​the device in a plan view of the device seen from above, and the heat receiving surface is disposed above the device; a fire extinguishing member that generates a fire extinguishing gas or a fire extinguishing liquid in response to heat is disposed in the storage space; The fire extinguishing member installation structure is characterized in that the fire extinguishing member is thermally coupled to the heat conducting part.

[0109] [Appendix 3] A distribution box having an accommodation space defined therein for arranging equipment, a metal heat-conducting part disposed along a surface of the inner surface of the distribution box facing the storage space that is above the device disposed in the storage space, the heat conducting portion has a heat receiving surface that is along a surface of the inner surface of the distribution box that faces the accommodation space and is located above the device, The storage space has a fire extinguishing member that generates a fire extinguishing gas or a fire extinguishing liquid in response to heat, The distribution box is characterized in that the fire extinguishing member is disposed on a part of the heat receiving surface.

[0110] [Appendix 4] A distribution box having an accommodation space defined therein for arranging equipment, a metal heat conducting part disposed in the accommodation space; the heat conducting portion has a heat receiving surface that entirely covers at least one of the inner surfaces of the distribution box that faces the housing space, The storage space has a fire extinguishing member that generates a fire extinguishing gas or a fire extinguishing liquid in response to heat, The fire extinguishing member is thermally coupled to the heat conducting portion.

[0111] [Appendix 5] A fire extinguishing member device to be placed in an accommodation space of a distribution box, the accommodation space being defined inside the distribution box for arranging equipment, a heat-conducting member having a fixing portion for fixing to the distribution box and a metal heat-conducting portion having a heat-receiving surface that receives heat when the device inside the distribution box ignites; a fire extinguishing member that is thermally coupled to the heat conducting portion and generates a fire extinguishing gas or a fire extinguishing liquid in response to heat generated when the equipment catches fire. [Explanation of symbols]

[0112] K...equipment, K1...first equipment, K2...second equipment, Ka, K1a, K2a...upper end surface, S...storage space, 11, 71...distribution box, 20...inlet, 40, 90...fire extinguishing member device, 41...heat conductive member, 42...fixing portion, 43...heat conductive portion, 43b, 91b...heat receiving surface, 50...fire extinguishing member, 50a...adhesion surface, 60...cable as wiring / piping material, 63...gap filling member, 91...heat conductive member constituting the heat conductive portion, 91c...fixing hole as fixing portion, 501...first fire extinguishing member, 502...second fire extinguishing member.

Claims

1. The equipment is arranged in a storage space defined inside the distribution box, a metal heat conducting part is disposed above the device in the accommodation space; the heat conducting portion has a heat receiving surface that is along a surface of the inner surface of the distribution box that faces the housing space and is located above the device, a fire extinguishing member that generates a fire extinguishing gas or a fire extinguishing liquid in response to heat is disposed in the storage space; The fire extinguishing member is separate from the heat conducting part, A fire extinguishing member installation structure, characterized in that the fire extinguishing member is connected to the heat conducting portion so that heat from the heat conducting portion is transferred to the fire extinguishing member.

2. 2. The fire extinguishing member installation structure according to claim 1, wherein the fire extinguishing member is disposed on a portion of the heat receiving surface, and the heat receiving surface other than the portion where the fire extinguishing member is disposed is exposed to the accommodation space.

3. 3. The fire extinguishing member installation structure according to claim 1, wherein the heat conduction section is disposed above the equipment, between the equipment and the inner surface of the distribution box, and spaced apart from the inner surface of the distribution box.

4. A fire extinguishing member installation structure as described in any one of claims 1 to 3, wherein the heat receiving surface covers the entire surface of the inner surface of the distribution box facing the storage space that is located above the equipment.

5. The fire extinguishing member installation structure according to any one of claims 1 to 4, wherein a plurality of the fire extinguishing members are arranged side by side on the heat receiving surface.

6. A fire extinguishing member installation structure according to any one of claims 1 to 5, wherein a portion of the fire extinguishing member is arranged so as to overlap the equipment in a plan view of the equipment from above.

7. A fire extinguishing member installation structure as described in any one of claims 1 to 6, wherein the distribution box has an inlet that connects the storage space with the outside of the distribution box, and the gap between the inlet and the wiring / piping material introduced into the storage space from the outside of the distribution box through the inlet is reduced by a gap filling member.

8. A distribution box having an accommodation space defined therein for arranging equipment, a metal heat-conducting part disposed along a surface of the inner surface of the distribution box facing the storage space that is above the device disposed in the storage space, the heat conducting portion has a heat receiving surface that is along a surface of the inner surface of the distribution box that faces the accommodation space and is located above the device, The storage space includes a fire extinguishing member that generates a fire extinguishing gas or a fire extinguishing liquid in response to heat, and the fire extinguishing member is separate from the heat conducting part, The fire extinguishing member is disposed on a portion of the heat receiving surface, and the heat receiving surface other than the portion where the fire extinguishing member is disposed is exposed to the storage space.

9. A distribution box having an accommodation space defined therein for arranging equipment, a metal heat conducting part disposed in the accommodation space; the heat conducting portion has a heat receiving surface that entirely covers at least one of the inner surfaces of the distribution box that faces the housing space, The storage space includes a fire extinguishing member that generates a fire extinguishing gas or a fire extinguishing liquid in response to heat, and the fire extinguishing member is separate from the heat conducting part, The fire extinguishing member is thermally coupled to the heat conducting portion so that heat from the heat conducting portion is transferred to the fire extinguishing member.

10. A fire extinguishing member device to be placed in an accommodation space of a distribution box, the accommodation space being defined inside the distribution box for arranging equipment, a heat-conducting member having a fixing portion for fixing to the distribution box and a metal heat-conducting portion having a heat-receiving surface that receives heat when the device inside the distribution box ignites; a fire extinguishing member that is thermally coupled to the heat conducting portion and generates a fire extinguishing gas or a fire extinguishing liquid in response to heat generated when the equipment catches fire; The fire extinguishing member is separate from the heat conducting part, 10. A fire extinguishing device, wherein the fire extinguishing member is thermally coupled to the heat conducting portion so that heat from the heat conducting portion is transferred to the fire extinguishing member.

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